/mandos/trunk : revision 504

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# "AvahiService" class, and some lines in "main".

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#

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# Everything else is

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#

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# This program is free software: you can redistribute it and/or modify

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# it under the terms of the GNU General Public License as published by

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# along with this program. If not, see

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# <http://www.gnu.org/licenses/>.

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#

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# Contact the authors at <mandos@recompile.se>.

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# Contact the authors at <mandos@fukt.bsnet.se>.

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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try:

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from future_builtins import *

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except ImportError:

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pass

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import SocketServer as socketserver

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import socket

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import argparse

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import datetime

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import errno

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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from gi.repository import GLib

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import gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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# Try to find the value of SO_BINDTODEVICE:

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try:

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# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and

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# newer, and it is also the most natural place for it:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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# In Python 2.7 it seems to have been removed entirely.

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# Try running the C preprocessor:

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try:

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cc = subprocess.Popen(["cc", "--language=c", "-E",

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]

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SO_BINDTODEVICE = int(stdout.splitlines()[-1])

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.9"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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ctypes.util.find_library("c")).if_nametoindex

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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"Get an interface index the hard way, i.e. using fcntl()"

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SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h

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with contextlib.closing(socket.socket()) as s:

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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struct.pack(b"16s16x", interface))

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interface_index = struct.unpack("I", ifreq[16:20])[0]

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return interface_index

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def copy_function(func):

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"""Make a copy of a function"""

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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def initlogger(debug, level=logging.WARNING):

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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('Mandos [%(process)d]: %(levelname)s:'

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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console.setFormatter(logging.Formatter('%(asctime)s %(name)s'

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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"""Exception if encryption/decryption fails"""

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pass

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class PGPEngine(object):

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"""A simple class for OpenPGP symmetric encryption & decryption"""

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def __init__(self):

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self.tempdir = tempfile.mkdtemp(prefix="mandos-")

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self.gpg = "gpg"

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try:

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output = subprocess.check_output(["gpgconf"])

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for line in output.splitlines():

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name, text, path = line.split(b":")

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet']

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# Only GPG version 1 has the --no-use-agent option.

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if self.gpg == "gpg" or self.gpg.endswith("/gpg"):

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self.gnupgargs.append("--no-use-agent")

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def __enter__(self):

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return self

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def __exit__(self, exc_type, exc_value, traceback):

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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for root, dirs, files in os.walk(self.tempdir,

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topdown = False):

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for filename in files:

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os.remove(os.path.join(root, filename))

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for dirname in dirs:

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os.rmdir(os.path.join(root, dirname))

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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# Passphrase can not be empty and can not contain newlines or

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# NUL bytes. So we prefix it and hex encode it.

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encoded = b"mandos" + binascii.hexlify(password)

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if len(encoded) > 2048:

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# GnuPG can't handle long passwords, so encode differently

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encoded = (b"mandos" + password.replace(b"\\", b"\\\\")

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.replace(b"\n", b"\\n")

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.replace(b"\0", b"\\x00"))

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen([self.gpg, '--symmetric',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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ciphertext, err = proc.communicate(input = data)

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen([self.gpg, '--decrypt',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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decrypted_plaintext, err = proc.communicate(input = data)

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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# Pretend that we have an Avahi module

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class Avahi(object):

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"""This isn't so much a class as it is a module-like namespace.

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It is instantiated once, and simulates having an Avahi module."""

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IF_UNSPEC = -1 # avahi-common/address.h

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PROTO_UNSPEC = -1 # avahi-common/address.h

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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def string_array_to_txt_array(self, t):

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return dbus.Array((dbus.ByteArray(s.encode("utf-8"))

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for s in t), signature="ay")

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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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avahi = Avahi()

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SO_BINDTODEVICE = None

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version = "1.3.1"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = str("/dev/log")))

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syslogger.setFormatter(logging.Formatter

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('Mandos [%(process)d]: %(levelname)s:'

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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102

300

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class AvahiError(Exception):

301

104

def __init__(self, value, *args, **kwargs):

302

105

self.value = value

303

return super(AvahiError, self).__init__(value, *args,

304

**kwargs)

305

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super(AvahiError, self).__init__(value, *args, **kwargs)

107

def __unicode__(self):

108

return unicode(repr(self.value))

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109

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class AvahiServiceError(AvahiError):

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111

pass

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class AvahiGroupError(AvahiError):

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pass

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115

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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type: string; Example: '_mandos._tcp'.

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See <https://www.iana.org/assignments/service-names-port-numbers>

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See <http://www.dns-sd.org/ServiceTypes.html>

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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domain: string; Domain to publish on, default to .local if empty.

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

137

def __init__(self, interface = avahi.IF_UNSPEC, name = None,

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servicetype = None, port = None, TXT = None,

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domain = "", host = "", max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC, bus = None):

347

141

self.interface = interface

348

142

self.name = name

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self.type = servicetype

358

152

self.server = None

359

153

self.bus = bus

360

154

self.entry_group_state_changed_match = None

361

362

def rename(self, remove=True):

155

def rename(self):

363

156

"""Derived from the Avahi example code"""

364

157

if self.rename_count >= self.max_renames:

365

158

logger.critical("No suitable Zeroconf service name found"

366

159

" after %i retries, exiting.",

367

160

self.rename_count)

368

161

raise AvahiServiceError("Too many renames")

369

self.name = str(

370

self.server.GetAlternativeServiceName(self.name))

371

self.rename_count += 1

162

self.name = unicode(self.server.GetAlternativeServiceName(self.name))

372

163

logger.info("Changing Zeroconf service name to %r ...",

373

164

self.name)

374

if remove:

375

self.remove()

165

syslogger.setFormatter(logging.Formatter

166

('Mandos (%s) [%%(process)d]:'

167

' %%(levelname)s: %%(message)s'

168

% self.name))

169

self.remove()

376

170

try:

377

171

self.add()

378

172

except dbus.exceptions.DBusException as error:

379

if (error.get_dbus_name()

380

== "org.freedesktop.Avahi.CollisionError"):

381

logger.info("Local Zeroconf service name collision.")

382

return self.rename(remove=False)

383

else:

384

logger.critical("D-Bus Exception", exc_info=error)

385

self.cleanup()

386

os._exit(1)

387

173

logger.critical("DBusException: %s", error)

174

self.cleanup()

175

os._exit(1)

176

self.rename_count += 1

388

177

def remove(self):

389

178

"""Derived from the Avahi example code"""

390

179

if self.entry_group_state_changed_match is not None:

392

181

self.entry_group_state_changed_match = None

393

182

if self.group is not None:

394

183

self.group.Reset()

395

396

184

def add(self):

397

185

"""Derived from the Avahi example code"""

398

186

self.remove()

403

191

avahi.DBUS_INTERFACE_ENTRY_GROUP)

404

192

self.entry_group_state_changed_match = (

405

193

self.group.connect_to_signal(

406

'StateChanged', self.entry_group_state_changed))

194

'StateChanged', self .entry_group_state_changed))

407

195

logger.debug("Adding Zeroconf service '%s' of type '%s' ...",

408

196

self.name, self.type)

409

197

self.group.AddService(

415

203

dbus.UInt16(self.port),

416

204

avahi.string_array_to_txt_array(self.TXT))

417

205

self.group.Commit()

418

419

206

def entry_group_state_changed(self, state, error):

420

207

"""Derived from the Avahi example code"""

421

208

logger.debug("Avahi entry group state change: %i", state)

427

214

self.rename()

428

215

elif state == avahi.ENTRY_GROUP_FAILURE:

429

216

logger.critical("Avahi: Error in group state changed %s",

430

str(error))

431

raise AvahiGroupError("State changed: {!s}".format(error))

432

217

unicode(error))

218

raise AvahiGroupError("State changed: %s"

219

% unicode(error))

433

220

def cleanup(self):

434

221

"""Derived from the Avahi example code"""

435

222

if self.group is not None:

436

223

try:

437

224

self.group.Free()

438

225

except (dbus.exceptions.UnknownMethodException,

439

dbus.exceptions.DBusException):

226

dbus.exceptions.DBusException) as e:

440

227

pass

441

228

self.group = None

442

229

self.remove()

443

444

230

def server_state_changed(self, state, error=None):

445

231

"""Derived from the Avahi example code"""

446

232

logger.debug("Avahi server state change: %i", state)

447

bad_states = {

448

avahi.SERVER_INVALID: "Zeroconf server invalid",

449

avahi.SERVER_REGISTERING: None,

450

avahi.SERVER_COLLISION: "Zeroconf server name collision",

451

avahi.SERVER_FAILURE: "Zeroconf server failure",

452

}

233

bad_states = { avahi.SERVER_INVALID:

234

"Zeroconf server invalid",

235

avahi.SERVER_REGISTERING: None,

236

avahi.SERVER_COLLISION:

237

"Zeroconf server name collision",

238

avahi.SERVER_FAILURE:

239

"Zeroconf server failure" }

453

240

if state in bad_states:

454

241

if bad_states[state] is not None:

455

242

if error is None:

458

245

logger.error(bad_states[state] + ": %r", error)

459

246

self.cleanup()

460

247

elif state == avahi.SERVER_RUNNING:

461

try:

462

self.add()

463

except dbus.exceptions.DBusException as error:

464

if (error.get_dbus_name()

465

== "org.freedesktop.Avahi.CollisionError"):

466

logger.info("Local Zeroconf service name"

467

" collision.")

468

return self.rename(remove=False)

469

else:

470

logger.critical("D-Bus Exception", exc_info=error)

471

self.cleanup()

472

os._exit(1)

248

self.add()

473

249

else:

474

250

if error is None:

475

251

logger.debug("Unknown state: %r", state)

476

252

else:

477

253

logger.debug("Unknown state: %r: %r", state, error)

478

479

254

def activate(self):

480

255

"""Derived from the Avahi example code"""

481

256

if self.server is None:

485

260

follow_name_owner_changes=True),

486

261

avahi.DBUS_INTERFACE_SERVER)

487

262

self.server.connect_to_signal("StateChanged",

488

self.server_state_changed)

263

self.server_state_changed)

489

264

self.server_state_changed(self.server.GetState())

490

265

491

266

492

class AvahiServiceToSyslog(AvahiService):

493

def rename(self, *args, **kwargs):

494

"""Add the new name to the syslog messages"""

495

ret = AvahiService.rename(self, *args, **kwargs)

496

syslogger.setFormatter(logging.Formatter(

497

'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'

498

.format(self.name)))

499

return ret

500

501

# Pretend that we have a GnuTLS module

502

class GnuTLS(object):

503

"""This isn't so much a class as it is a module-like namespace.

504

It is instantiated once, and simulates having a GnuTLS module."""

505

506

_library = ctypes.cdll.LoadLibrary(

507

ctypes.util.find_library("gnutls"))

508

_need_version = b"3.3.0"

509

def __init__(self):

510

# Need to use class name "GnuTLS" here, since this method is

511

# called before the assignment to the "gnutls" global variable

512

# happens.

513

if GnuTLS.check_version(self._need_version) is None:

514

raise GnuTLS.Error("Needs GnuTLS {} or later"

515

.format(self._need_version))

516

517

# Unless otherwise indicated, the constants and types below are

518

# all from the gnutls/gnutls.h C header file.

519

520

# Constants

521

E_SUCCESS = 0

522

E_INTERRUPTED = -52

523

E_AGAIN = -28

524

CRT_OPENPGP = 2

525

CLIENT = 2

526

SHUT_RDWR = 0

527

CRD_CERTIFICATE = 1

528

E_NO_CERTIFICATE_FOUND = -49

529

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

530

531

# Types

532

class session_int(ctypes.Structure):

533

_fields_ = []

534

session_t = ctypes.POINTER(session_int)

535

class certificate_credentials_st(ctypes.Structure):

536

_fields_ = []

537

certificate_credentials_t = ctypes.POINTER(

538

certificate_credentials_st)

539

certificate_type_t = ctypes.c_int

540

class datum_t(ctypes.Structure):

541

_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),

542

('size', ctypes.c_uint)]

543

class openpgp_crt_int(ctypes.Structure):

544

_fields_ = []

545

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

546

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

547

log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)

548

credentials_type_t = ctypes.c_int

549

transport_ptr_t = ctypes.c_void_p

550

close_request_t = ctypes.c_int

551

552

# Exceptions

553

class Error(Exception):

554

# We need to use the class name "GnuTLS" here, since this

555

# exception might be raised from within GnuTLS.__init__,

556

# which is called before the assignment to the "gnutls"

557

# global variable has happened.

558

def __init__(self, message = None, code = None, args=()):

559

# Default usage is by a message string, but if a return

560

# code is passed, convert it to a string with

561

# gnutls.strerror()

562

self.code = code

563

if message is None and code is not None:

564

message = GnuTLS.strerror(code)

565

return super(GnuTLS.Error, self).__init__(

566

message, *args)

567

568

class CertificateSecurityError(Error):

569

pass

570

571

# Classes

572

class Credentials(object):

573

def __init__(self):

574

self._c_object = gnutls.certificate_credentials_t()

575

gnutls.certificate_allocate_credentials(

576

ctypes.byref(self._c_object))

577

self.type = gnutls.CRD_CERTIFICATE

578

579

def __del__(self):

580

gnutls.certificate_free_credentials(self._c_object)

581

582

class ClientSession(object):

583

def __init__(self, socket, credentials = None):

584

self._c_object = gnutls.session_t()

585

gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)

586

gnutls.set_default_priority(self._c_object)

587

gnutls.transport_set_ptr(self._c_object, socket.fileno())

588

gnutls.handshake_set_private_extensions(self._c_object,

589

True)

590

self.socket = socket

591

if credentials is None:

592

credentials = gnutls.Credentials()

593

gnutls.credentials_set(self._c_object, credentials.type,

594

ctypes.cast(credentials._c_object,

595

ctypes.c_void_p))

596

self.credentials = credentials

597

598

def __del__(self):

599

gnutls.deinit(self._c_object)

600

601

def handshake(self):

602

return gnutls.handshake(self._c_object)

603

604

def send(self, data):

605

data = bytes(data)

606

data_len = len(data)

607

while data_len > 0:

608

data_len -= gnutls.record_send(self._c_object,

609

data[-data_len:],

610

data_len)

611

612

def bye(self):

613

return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)

614

615

# Error handling functions

616

def _error_code(result):

617

"""A function to raise exceptions on errors, suitable

618

for the 'restype' attribute on ctypes functions"""

619

if result >= 0:

620

return result

621

if result == gnutls.E_NO_CERTIFICATE_FOUND:

622

raise gnutls.CertificateSecurityError(code = result)

623

raise gnutls.Error(code = result)

624

625

def _retry_on_error(result, func, arguments):

626

"""A function to retry on some errors, suitable

627

for the 'errcheck' attribute on ctypes functions"""

628

while result < 0:

629

if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):

630

return _error_code(result)

631

result = func(*arguments)

632

return result

633

634

# Unless otherwise indicated, the function declarations below are

635

# all from the gnutls/gnutls.h C header file.

636

637

# Functions

638

priority_set_direct = _library.gnutls_priority_set_direct

639

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

640

ctypes.POINTER(ctypes.c_char_p)]

641

priority_set_direct.restype = _error_code

642

643

init = _library.gnutls_init

644

init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]

645

init.restype = _error_code

646

647

set_default_priority = _library.gnutls_set_default_priority

648

set_default_priority.argtypes = [session_t]

649

set_default_priority.restype = _error_code

650

651

record_send = _library.gnutls_record_send

652

record_send.argtypes = [session_t, ctypes.c_void_p,

653

ctypes.c_size_t]

654

record_send.restype = ctypes.c_ssize_t

655

record_send.errcheck = _retry_on_error

656

657

certificate_allocate_credentials = (

658

_library.gnutls_certificate_allocate_credentials)

659

certificate_allocate_credentials.argtypes = [

660

ctypes.POINTER(certificate_credentials_t)]

661

certificate_allocate_credentials.restype = _error_code

662

663

certificate_free_credentials = (

664

_library.gnutls_certificate_free_credentials)

665

certificate_free_credentials.argtypes = [certificate_credentials_t]

666

certificate_free_credentials.restype = None

667

668

handshake_set_private_extensions = (

669

_library.gnutls_handshake_set_private_extensions)

670

handshake_set_private_extensions.argtypes = [session_t,

671

ctypes.c_int]

672

handshake_set_private_extensions.restype = None

673

674

credentials_set = _library.gnutls_credentials_set

675

credentials_set.argtypes = [session_t, credentials_type_t,

676

ctypes.c_void_p]

677

credentials_set.restype = _error_code

678

679

strerror = _library.gnutls_strerror

680

strerror.argtypes = [ctypes.c_int]

681

strerror.restype = ctypes.c_char_p

682

683

certificate_type_get = _library.gnutls_certificate_type_get

684

certificate_type_get.argtypes = [session_t]

685

certificate_type_get.restype = _error_code

686

687

certificate_get_peers = _library.gnutls_certificate_get_peers

688

certificate_get_peers.argtypes = [session_t,

689

ctypes.POINTER(ctypes.c_uint)]

690

certificate_get_peers.restype = ctypes.POINTER(datum_t)

691

692

global_set_log_level = _library.gnutls_global_set_log_level

693

global_set_log_level.argtypes = [ctypes.c_int]

694

global_set_log_level.restype = None

695

696

global_set_log_function = _library.gnutls_global_set_log_function

697

global_set_log_function.argtypes = [log_func]

698

global_set_log_function.restype = None

699

700

deinit = _library.gnutls_deinit

701

deinit.argtypes = [session_t]

702

deinit.restype = None

703

704

handshake = _library.gnutls_handshake

705

handshake.argtypes = [session_t]

706

handshake.restype = _error_code

707

handshake.errcheck = _retry_on_error

708

709

transport_set_ptr = _library.gnutls_transport_set_ptr

710

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

711

transport_set_ptr.restype = None

712

713

bye = _library.gnutls_bye

714

bye.argtypes = [session_t, close_request_t]

715

bye.restype = _error_code

716

bye.errcheck = _retry_on_error

717

718

check_version = _library.gnutls_check_version

719

check_version.argtypes = [ctypes.c_char_p]

720

check_version.restype = ctypes.c_char_p

721

722

# All the function declarations below are from gnutls/openpgp.h

723

724

openpgp_crt_init = _library.gnutls_openpgp_crt_init

725

openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]

726

openpgp_crt_init.restype = _error_code

727

728

openpgp_crt_import = _library.gnutls_openpgp_crt_import

729

openpgp_crt_import.argtypes = [openpgp_crt_t,

730

ctypes.POINTER(datum_t),

731

openpgp_crt_fmt_t]

732

openpgp_crt_import.restype = _error_code

733

734

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

735

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

736

ctypes.POINTER(ctypes.c_uint)]

737

openpgp_crt_verify_self.restype = _error_code

738

739

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

740

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

741

openpgp_crt_deinit.restype = None

742

743

openpgp_crt_get_fingerprint = (

744

_library.gnutls_openpgp_crt_get_fingerprint)

745

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

746

ctypes.c_void_p,

747

ctypes.POINTER(

748

ctypes.c_size_t)]

749

openpgp_crt_get_fingerprint.restype = _error_code

750

751

# Remove non-public functions

752

del _error_code, _retry_on_error

753

# Create the global "gnutls" object, simulating a module

754

gnutls = GnuTLS()

755

756

def call_pipe(connection, # : multiprocessing.Connection

757

func, *args, **kwargs):

758

"""This function is meant to be called by multiprocessing.Process

759

760

This function runs func(*args, **kwargs), and writes the resulting

761

return value on the provided multiprocessing.Connection.

762

"""

763

connection.send(func(*args, **kwargs))

764

connection.close()

765

267

def _timedelta_to_milliseconds(td):

268

"Convert a datetime.timedelta() to milliseconds"

269

return ((td.days * 24 * 60 * 60 * 1000)

270

+ (td.seconds * 1000)

271

+ (td.microseconds // 1000))

272

766

273

class Client(object):

767

274

"""A representation of a client host served by this server.

768

275

769

276

Attributes:

770

approved: bool(); 'None' if not yet approved/disapproved

277

_approved: bool(); 'None' if not yet approved/disapproved

771

278

approval_delay: datetime.timedelta(); Time to wait for approval

772

279

approval_duration: datetime.timedelta(); Duration of one approval

773

280

checker: subprocess.Popen(); a running checker process used

774

281

to see if the client lives.

775

282

'None' if no process is running.

776

checker_callback_tag: a GLib event source tag, or None

283

checker_callback_tag: a gobject event source tag, or None

777

284

checker_command: string; External command which is run to check

778

285

if client lives. %() expansions are done at

779

286

runtime with vars(self) as dict, so that for

780

287

instance %(name)s can be used in the command.

781

checker_initiator_tag: a GLib event source tag, or None

288

checker_initiator_tag: a gobject event source tag, or None

782

289

created: datetime.datetime(); (UTC) object creation

783

client_structure: Object describing what attributes a client has

784

and is used for storing the client at exit

785

290

current_checker_command: string; current running checker_command

786

disable_initiator_tag: a GLib event source tag, or None

291

disable_hook: If set, called by disable() as disable_hook(self)

292

disable_initiator_tag: a gobject event source tag, or None

787

293

enabled: bool()

788

294

fingerprint: string (40 or 32 hexadecimal digits); used to

789

295

uniquely identify the client

791

297

interval: datetime.timedelta(); How often to start a new checker

792

298

last_approval_request: datetime.datetime(); (UTC) or None

793

299

last_checked_ok: datetime.datetime(); (UTC) or None

794

last_checker_status: integer between 0 and 255 reflecting exit

795

status of last checker. -1 reflects crashed

796

checker, -2 means no checker completed yet.

797

last_checker_signal: The signal which killed the last checker, if

798

last_checker_status is -1

799

last_enabled: datetime.datetime(); (UTC) or None

300

last_enabled: datetime.datetime(); (UTC)

800

301

name: string; from the config file, used in log messages and

801

302

D-Bus identifiers

802

303

secret: bytestring; sent verbatim (over TLS) to client

803

304

timeout: datetime.timedelta(); How long from last_checked_ok

804

305

until this client is disabled

805

extended_timeout: extra long timeout when secret has been sent

306

extended_timeout: extra long timeout when password has been sent

806

307

runtime_expansions: Allowed attributes for runtime expansion.

807

308

expires: datetime.datetime(); time (UTC) when a client will be

808

309

disabled, or None

809

server_settings: The server_settings dict from main()

810

310

"""

811

311

812

312

runtime_expansions = ("approval_delay", "approval_duration",

813

"created", "enabled", "expires",

814

"fingerprint", "host", "interval",

815

"last_approval_request", "last_checked_ok",

313

"created", "enabled", "fingerprint",

314

"host", "interval", "last_checked_ok",

816

315

"last_enabled", "name", "timeout")

817

client_defaults = {

818

"timeout": "PT5M",

819

"extended_timeout": "PT15M",

820

"interval": "PT2M",

821

"checker": "fping -q -- %%(host)s",

822

"host": "",

823

"approval_delay": "PT0S",

824

"approval_duration": "PT1S",

825

"approved_by_default": "True",

826

"enabled": "True",

827

}

828

829

@staticmethod

830

def config_parser(config):

831

"""Construct a new dict of client settings of this form:

832

{ client_name: {setting_name: value, ...}, ...}

833

with exceptions for any special settings as defined above.

834

NOTE: Must be a pure function. Must return the same result

835

value given the same arguments.

836

"""

837

settings = {}

838

for client_name in config.sections():

839

section = dict(config.items(client_name))

840

client = settings[client_name] = {}

841

842

client["host"] = section["host"]

843

# Reformat values from string types to Python types

844

client["approved_by_default"] = config.getboolean(

845

client_name, "approved_by_default")

846

client["enabled"] = config.getboolean(client_name,

847

"enabled")

848

849

# Uppercase and remove spaces from fingerprint for later

850

# comparison purposes with return value from the

851

# fingerprint() function

852

client["fingerprint"] = (section["fingerprint"].upper()

853

.replace(" ", ""))

854

if "secret" in section:

855

client["secret"] = codecs.decode(section["secret"]

856

.encode("utf-8"),

857

"base64")

858

elif "secfile" in section:

859

with open(os.path.expanduser(os.path.expandvars

860

(section["secfile"])),

861

"rb") as secfile:

862

client["secret"] = secfile.read()

863

else:

864

raise TypeError("No secret or secfile for section {}"

865

.format(section))

866

client["timeout"] = string_to_delta(section["timeout"])

867

client["extended_timeout"] = string_to_delta(

868

section["extended_timeout"])

869

client["interval"] = string_to_delta(section["interval"])

870

client["approval_delay"] = string_to_delta(

871

section["approval_delay"])

872

client["approval_duration"] = string_to_delta(

873

section["approval_duration"])

874

client["checker_command"] = section["checker"]

875

client["last_approval_request"] = None

876

client["last_checked_ok"] = None

877

client["last_checker_status"] = -2

878

879

return settings

880

881

def __init__(self, settings, name = None, server_settings=None):

316

317

def timeout_milliseconds(self):

318

"Return the 'timeout' attribute in milliseconds"

319

return _timedelta_to_milliseconds(self.timeout)

320

321

def extended_timeout_milliseconds(self):

322

"Return the 'extended_timeout' attribute in milliseconds"

323

return _timedelta_to_milliseconds(self.extended_timeout)

324

325

def interval_milliseconds(self):

326

"Return the 'interval' attribute in milliseconds"

327

return _timedelta_to_milliseconds(self.interval)

328

329

def approval_delay_milliseconds(self):

330

return _timedelta_to_milliseconds(self.approval_delay)

331

332

def __init__(self, name = None, disable_hook=None, config=None):

333

"""Note: the 'checker' key in 'config' sets the

334

'checker_command' attribute and *not* the 'checker'

335

attribute."""

882

336

self.name = name

883

if server_settings is None:

884

server_settings = {}

885

self.server_settings = server_settings

886

# adding all client settings

887

for setting, value in settings.items():

888

setattr(self, setting, value)

889

890

if self.enabled:

891

if not hasattr(self, "last_enabled"):

892

self.last_enabled = datetime.datetime.utcnow()

893

if not hasattr(self, "expires"):

894

self.expires = (datetime.datetime.utcnow()

895

+ self.timeout)

896

else:

897

self.last_enabled = None

898

self.expires = None

899

337

if config is None:

338

config = {}

900

339

logger.debug("Creating client %r", self.name)

340

# Uppercase and remove spaces from fingerprint for later

341

# comparison purposes with return value from the fingerprint()

342

# function

343

self.fingerprint = (config["fingerprint"].upper()

344

.replace(" ", ""))

901

345

logger.debug(" Fingerprint: %s", self.fingerprint)

902

self.created = settings.get("created",

903

datetime.datetime.utcnow())

904

905

# attributes specific for this server instance

346

if "secret" in config:

347

self.secret = config["secret"].decode("base64")

348

elif "secfile" in config:

349

with open(os.path.expanduser(os.path.expandvars

350

(config["secfile"])),

351

"rb") as secfile:

352

self.secret = secfile.read()

353

else:

354

raise TypeError("No secret or secfile for client %s"

355

% self.name)

356

self.host = config.get("host", "")

357

self.created = datetime.datetime.utcnow()

358

self.enabled = False

359

self.last_approval_request = None

360

self.last_enabled = None

361

self.last_checked_ok = None

362

self.timeout = string_to_delta(config["timeout"])

363

self.extended_timeout = string_to_delta(config["extended_timeout"])

364

self.interval = string_to_delta(config["interval"])

365

self.disable_hook = disable_hook

906

366

self.checker = None

907

367

self.checker_initiator_tag = None

908

368

self.disable_initiator_tag = None

369

self.expires = None

909

370

self.checker_callback_tag = None

371

self.checker_command = config["checker"]

910

372

self.current_checker_command = None

911

self.approved = None

373

self.last_connect = None

374

self._approved = None

375

self.approved_by_default = config.get("approved_by_default",

376

True)

912

377

self.approvals_pending = 0

913

self.changedstate = multiprocessing_manager.Condition(

914

multiprocessing_manager.Lock())

915

self.client_structure = [attr

916

for attr in self.__dict__.keys()

917

if not attr.startswith("_")]

918

self.client_structure.append("client_structure")

919

920

for name, t in inspect.getmembers(

921

type(self), lambda obj: isinstance(obj, property)):

922

if not name.startswith("_"):

923

self.client_structure.append(name)

378

self.approval_delay = string_to_delta(

379

config["approval_delay"])

380

self.approval_duration = string_to_delta(

381

config["approval_duration"])

382

self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())

924

383

925

# Send notice to process children that client state has changed

926

384

def send_changedstate(self):

927

with self.changedstate:

928

self.changedstate.notify_all()

929

385

self.changedstate.acquire()

386

self.changedstate.notify_all()

387

self.changedstate.release()

388

930

389

def enable(self):

931

390

"""Start this client's checker and timeout hooks"""

932

391

if getattr(self, "enabled", False):

933

392

# Already enabled

934

393

return

394

self.send_changedstate()

395

# Schedule a new checker to be started an 'interval' from now,

396

# and every interval from then on.

397

self.checker_initiator_tag = (gobject.timeout_add

398

(self.interval_milliseconds(),

399

self.start_checker))

400

# Schedule a disable() when 'timeout' has passed

935

401

self.expires = datetime.datetime.utcnow() + self.timeout

402

self.disable_initiator_tag = (gobject.timeout_add

403

(self.timeout_milliseconds(),

404

self.disable))

936

405

self.enabled = True

937

406

self.last_enabled = datetime.datetime.utcnow()

938

self.init_checker()

939

self.send_changedstate()

407

# Also start a new checker *right now*.

408

self.start_checker()

940

409

941

410

def disable(self, quiet=True):

942

411

"""Disable this client."""

943

412

if not getattr(self, "enabled", False):

944

413

return False

945

414

if not quiet:

415

self.send_changedstate()

416

if not quiet:

946

417

logger.info("Disabling client %s", self.name)

947

if getattr(self, "disable_initiator_tag", None) is not None:

948

GLib.source_remove(self.disable_initiator_tag)

418

if getattr(self, "disable_initiator_tag", False):

419

gobject.source_remove(self.disable_initiator_tag)

949

420

self.disable_initiator_tag = None

950

421

self.expires = None

951

if getattr(self, "checker_initiator_tag", None) is not None:

952

GLib.source_remove(self.checker_initiator_tag)

422

if getattr(self, "checker_initiator_tag", False):

423

gobject.source_remove(self.checker_initiator_tag)

953

424

self.checker_initiator_tag = None

954

425

self.stop_checker()

426

if self.disable_hook:

427

self.disable_hook(self)

955

428

self.enabled = False

956

if not quiet:

957

self.send_changedstate()

958

# Do not run this again if called by a GLib.timeout_add

429

# Do not run this again if called by a gobject.timeout_add

959

430

return False

960

431

961

432

def __del__(self):

433

self.disable_hook = None

962

434

self.disable()

963

435

964

def init_checker(self):

965

# Schedule a new checker to be started an 'interval' from now,

966

# and every interval from then on.

967

if self.checker_initiator_tag is not None:

968

GLib.source_remove(self.checker_initiator_tag)

969

self.checker_initiator_tag = GLib.timeout_add(

970

int(self.interval.total_seconds() * 1000),

971

self.start_checker)

972

# Schedule a disable() when 'timeout' has passed

973

if self.disable_initiator_tag is not None:

974

GLib.source_remove(self.disable_initiator_tag)

975

self.disable_initiator_tag = GLib.timeout_add(

976

int(self.timeout.total_seconds() * 1000), self.disable)

977

# Also start a new checker *right now*.

978

self.start_checker()

979

980

def checker_callback(self, source, condition, connection,

981

command):

436

def checker_callback(self, pid, condition, command):

982

437

"""The checker has completed, so take appropriate actions."""

983

438

self.checker_callback_tag = None

984

439

self.checker = None

985

# Read return code from connection (see call_pipe)

986

returncode = connection.recv()

987

connection.close()

988

989

if returncode >= 0:

990

self.last_checker_status = returncode

991

self.last_checker_signal = None

992

if self.last_checker_status == 0:

440

if os.WIFEXITED(condition):

441

exitstatus = os.WEXITSTATUS(condition)

442

if exitstatus == 0:

993

443

logger.info("Checker for %(name)s succeeded",

994

444

vars(self))

995

445

self.checked_ok()

996

446

else:

997

logger.info("Checker for %(name)s failed", vars(self))

447

logger.info("Checker for %(name)s failed",

448

vars(self))

998

449

else:

999

self.last_checker_status = -1

1000

self.last_checker_signal = -returncode

1001

450

logger.warning("Checker for %(name)s crashed?",

1002

451

vars(self))

1003

return False

1004

1005

def checked_ok(self):

1006

"""Assert that the client has been seen, alive and well."""

1007

self.last_checked_ok = datetime.datetime.utcnow()

1008

self.last_checker_status = 0

1009

self.last_checker_signal = None

1010

self.bump_timeout()

1011

1012

def bump_timeout(self, timeout=None):

1013

"""Bump up the timeout for this client."""

452

453

def checked_ok(self, timeout=None):

454

"""Bump up the timeout for this client.

455

456

This should only be called when the client has been seen,

457

alive and well.

458

"""

1014

459

if timeout is None:

1015

460

timeout = self.timeout

1016

if self.disable_initiator_tag is not None:

1017

GLib.source_remove(self.disable_initiator_tag)

1018

self.disable_initiator_tag = None

1019

if getattr(self, "enabled", False):

1020

self.disable_initiator_tag = GLib.timeout_add(

1021

int(timeout.total_seconds() * 1000), self.disable)

1022

self.expires = datetime.datetime.utcnow() + timeout

461

self.last_checked_ok = datetime.datetime.utcnow()

462

gobject.source_remove(self.disable_initiator_tag)

463

self.expires = datetime.datetime.utcnow() + timeout

464

self.disable_initiator_tag = (gobject.timeout_add

465

(_timedelta_to_milliseconds(timeout),

466

self.disable))

1023

467

1024

468

def need_approval(self):

1025

469

self.last_approval_request = datetime.datetime.utcnow()

1030

474

If a checker already exists, leave it running and do

1031

475

nothing."""

1032

476

# The reason for not killing a running checker is that if we

1033

# did that, and if a checker (for some reason) started running

1034

# slowly and taking more than 'interval' time, then the client

1035

# would inevitably timeout, since no checker would get a

1036

# chance to run to completion. If we instead leave running

477

# did that, then if a checker (for some reason) started

478

# running slowly and taking more than 'interval' time, the

479

# client would inevitably timeout, since no checker would get

480

# a chance to run to completion. If we instead leave running

1037

481

# checkers alone, the checker would have to take more time

1038

482

# than 'timeout' for the client to be disabled, which is as it

1039

483

# should be.

1040

484

1041

if self.checker is not None and not self.checker.is_alive():

1042

logger.warning("Checker was not alive; joining")

1043

self.checker.join()

1044

self.checker = None

485

# If a checker exists, make sure it is not a zombie

486

try:

487

pid, status = os.waitpid(self.checker.pid, os.WNOHANG)

488

except (AttributeError, OSError) as error:

489

if (isinstance(error, OSError)

490

and error.errno != errno.ECHILD):

491

raise error

492

else:

493

if pid:

494

logger.warning("Checker was a zombie")

495

gobject.source_remove(self.checker_callback_tag)

496

self.checker_callback(pid, status,

497

self.current_checker_command)

1045

498

# Start a new checker if needed

1046

499

if self.checker is None:

1047

# Escape attributes for the shell

1048

escaped_attrs = {

1049

attr: re.escape(str(getattr(self, attr)))

1050

for attr in self.runtime_expansions }

1051

500

try:

1052

command = self.checker_command % escaped_attrs

1053

except TypeError as error:

1054

logger.error('Could not format string "%s"',

1055

self.checker_command,

1056

exc_info=error)

1057

return True # Try again later

501

# In case checker_command has exactly one % operator

502

command = self.checker_command % self.host

503

except TypeError:

504

# Escape attributes for the shell

505

escaped_attrs = dict(

506

(attr,

507

re.escape(unicode(str(getattr(self, attr, "")),

508

errors=

509

'replace')))

510

for attr in

511

self.runtime_expansions)

512

513

try:

514

command = self.checker_command % escaped_attrs

515

except TypeError as error:

516

logger.error('Could not format string "%s":'

517

' %s', self.checker_command, error)

518

return True # Try again later

1058

519

self.current_checker_command = command

1059

logger.info("Starting checker %r for %s", command,

1060

self.name)

1061

# We don't need to redirect stdout and stderr, since

1062

# in normal mode, that is already done by daemon(),

1063

# and in debug mode we don't want to. (Stdin is

1064

# always replaced by /dev/null.)

1065

# The exception is when not debugging but nevertheless

1066

# running in the foreground; use the previously

1067

# created wnull.

1068

popen_args = { "close_fds": True,

1069

"shell": True,

1070

"cwd": "/" }

1071

if (not self.server_settings["debug"]

1072

and self.server_settings["foreground"]):

1073

popen_args.update({"stdout": wnull,

1074

"stderr": wnull })

1075

pipe = multiprocessing.Pipe(duplex = False)

1076

self.checker = multiprocessing.Process(

1077

target = call_pipe,

1078

args = (pipe[1], subprocess.call, command),

1079

kwargs = popen_args)

1080

self.checker.start()

1081

self.checker_callback_tag = GLib.io_add_watch(

1082

pipe[0].fileno(), GLib.IO_IN,

1083

self.checker_callback, pipe[0], command)

1084

# Re-run this periodically if run by GLib.timeout_add

520

try:

521

logger.info("Starting checker %r for %s",

522

command, self.name)

523

# We don't need to redirect stdout and stderr, since

524

# in normal mode, that is already done by daemon(),

525

# and in debug mode we don't want to. (Stdin is

526

# always replaced by /dev/null.)

527

self.checker = subprocess.Popen(command,

528

close_fds=True,

529

shell=True, cwd="/")

530

self.checker_callback_tag = (gobject.child_watch_add

531

(self.checker.pid,

532

self.checker_callback,

533

data=command))

534

# The checker may have completed before the gobject

535

# watch was added. Check for this.

536

pid, status = os.waitpid(self.checker.pid, os.WNOHANG)

537

if pid:

538

gobject.source_remove(self.checker_callback_tag)

539

self.checker_callback(pid, status, command)

540

except OSError as error:

541

logger.error("Failed to start subprocess: %s",

542

error)

543

# Re-run this periodically if run by gobject.timeout_add

1085

544

return True

1086

545

1087

546

def stop_checker(self):

1088

547

"""Force the checker process, if any, to stop."""

1089

548

if self.checker_callback_tag:

1090

GLib.source_remove(self.checker_callback_tag)

549

gobject.source_remove(self.checker_callback_tag)

1091

550

self.checker_callback_tag = None

1092

551

if getattr(self, "checker", None) is None:

1093

552

return

1094

553

logger.debug("Stopping checker for %(name)s", vars(self))

1095

self.checker.terminate()

554

try:

555

os.kill(self.checker.pid, signal.SIGTERM)

556

#time.sleep(0.5)

557

#if self.checker.poll() is None:

558

# os.kill(self.checker.pid, signal.SIGKILL)

559

except OSError as error:

560

if error.errno != errno.ESRCH: # No such process

561

raise

1096

562

self.checker = None

1097

563

1098

564

1099

def dbus_service_property(dbus_interface,

1100

signature="v",

1101

access="readwrite",

1102

byte_arrays=False):

565

def dbus_service_property(dbus_interface, signature="v",

566

access="readwrite", byte_arrays=False):

1103

567

"""Decorators for marking methods of a DBusObjectWithProperties to

1104

568

become properties on the D-Bus.

1105

569

1114

578

# "Set" method, so we fail early here:

1115

579

if byte_arrays and signature != "ay":

1116

580

raise ValueError("Byte arrays not supported for non-'ay'"

1117

" signature {!r}".format(signature))

1118

581

" signature %r" % signature)

1119

582

def decorator(func):

1120

583

func._dbus_is_property = True

1121

584

func._dbus_interface = dbus_interface

1126

589

func._dbus_name = func._dbus_name[:-14]

1127

590

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1128

591

return func

1129

1130

return decorator

1131

1132

1133

def dbus_interface_annotations(dbus_interface):

1134

"""Decorator for marking functions returning interface annotations

1135

1136

Usage:

1137

1138

@dbus_interface_annotations("org.example.Interface")

1139

def _foo(self): # Function name does not matter

1140

return {"org.freedesktop.DBus.Deprecated": "true",

1141

"org.freedesktop.DBus.Property.EmitsChangedSignal":

1142

"false"}

1143

"""

1144

1145

def decorator(func):

1146

func._dbus_is_interface = True

1147

func._dbus_interface = dbus_interface

1148

func._dbus_name = dbus_interface

1149

return func

1150

1151

return decorator

1152

1153

1154

def dbus_annotations(annotations):

1155

"""Decorator to annotate D-Bus methods, signals or properties

1156

Usage:

1157

1158

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",

1159

"org.freedesktop.DBus.Property."

1160

"EmitsChangedSignal": "false"})

1161

@dbus_service_property("org.example.Interface", signature="b",

1162

access="r")

1163

def Property_dbus_property(self):

1164

return dbus.Boolean(False)

1165

1166

See also the DBusObjectWithAnnotations class.

1167

"""

1168

1169

def decorator(func):

1170

func._dbus_annotations = annotations

1171

return func

1172

1173

592

return decorator

1174

593

1175

594

1176

595

class DBusPropertyException(dbus.exceptions.DBusException):

1177

596

"""A base class for D-Bus property-related exceptions

1178

597

"""

1179

pass

598

def __unicode__(self):

599

return unicode(str(self))

1180

600

1181

601

1182

602

class DBusPropertyAccessException(DBusPropertyException):

1191

611

pass

1192

612

1193

613

1194

class DBusObjectWithAnnotations(dbus.service.Object):

1195

"""A D-Bus object with annotations.

1196

1197

Classes inheriting from this can use the dbus_annotations

1198

decorator to add annotations to methods or signals.

1199

"""

1200

1201

@staticmethod

1202

def _is_dbus_thing(thing):

1203

"""Returns a function testing if an attribute is a D-Bus thing

1204

1205

If called like _is_dbus_thing("method") it returns a function

1206

suitable for use as predicate to inspect.getmembers().

1207

"""

1208

return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),

1209

False)

1210

1211

def _get_all_dbus_things(self, thing):

1212

"""Returns a generator of (name, attribute) pairs

1213

"""

1214

return ((getattr(athing.__get__(self), "_dbus_name", name),

1215

athing.__get__(self))

1216

for cls in self.__class__.__mro__

1217

for name, athing in

1218

inspect.getmembers(cls, self._is_dbus_thing(thing)))

1219

1220

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1221

out_signature = "s",

1222

path_keyword = 'object_path',

1223

connection_keyword = 'connection')

1224

def Introspect(self, object_path, connection):

1225

"""Overloading of standard D-Bus method.

1226

1227

Inserts annotation tags on methods and signals.

1228

"""

1229

xmlstring = dbus.service.Object.Introspect(self, object_path,

1230

connection)

1231

try:

1232

document = xml.dom.minidom.parseString(xmlstring)

1233

1234

for if_tag in document.getElementsByTagName("interface"):

1235

# Add annotation tags

1236

for typ in ("method", "signal"):

1237

for tag in if_tag.getElementsByTagName(typ):

1238

annots = dict()

1239

for name, prop in (self.

1240

_get_all_dbus_things(typ)):

1241

if (name == tag.getAttribute("name")

1242

and prop._dbus_interface

1243

== if_tag.getAttribute("name")):

1244

annots.update(getattr(

1245

prop, "_dbus_annotations", {}))

1246

for name, value in annots.items():

1247

ann_tag = document.createElement(

1248

"annotation")

1249

ann_tag.setAttribute("name", name)

1250

ann_tag.setAttribute("value", value)

1251

tag.appendChild(ann_tag)

1252

# Add interface annotation tags

1253

for annotation, value in dict(

1254

itertools.chain.from_iterable(

1255

annotations().items()

1256

for name, annotations

1257

in self._get_all_dbus_things("interface")

1258

if name == if_tag.getAttribute("name")

1259

)).items():

1260

ann_tag = document.createElement("annotation")

1261

ann_tag.setAttribute("name", annotation)

1262

ann_tag.setAttribute("value", value)

1263

if_tag.appendChild(ann_tag)

1264

# Fix argument name for the Introspect method itself

1265

if (if_tag.getAttribute("name")

1266

== dbus.INTROSPECTABLE_IFACE):

1267

for cn in if_tag.getElementsByTagName("method"):

1268

if cn.getAttribute("name") == "Introspect":

1269

for arg in cn.getElementsByTagName("arg"):

1270

if (arg.getAttribute("direction")

1271

== "out"):

1272

arg.setAttribute("name",

1273

"xml_data")

1274

xmlstring = document.toxml("utf-8")

1275

document.unlink()

1276

except (AttributeError, xml.dom.DOMException,

1277

xml.parsers.expat.ExpatError) as error:

1278

logger.error("Failed to override Introspection method",

1279

exc_info=error)

1280

return xmlstring

1281

1282

1283

class DBusObjectWithProperties(DBusObjectWithAnnotations):

614

class DBusObjectWithProperties(dbus.service.Object):

1284

615

"""A D-Bus object with properties.

1285

616

1286

617

Classes inheriting from this can use the dbus_service_property

1288

619

standard Get(), Set(), and GetAll() methods on the D-Bus.

1289

620

"""

1290

621

622

@staticmethod

623

def _is_dbus_property(obj):

624

return getattr(obj, "_dbus_is_property", False)

625

626

def _get_all_dbus_properties(self):

627

"""Returns a generator of (name, attribute) pairs

628

"""

629

return ((prop._dbus_name, prop)

630

for name, prop in

631

inspect.getmembers(self, self._is_dbus_property))

632

1291

633

def _get_dbus_property(self, interface_name, property_name):

1292

634

"""Returns a bound method if one exists which is a D-Bus

1293

635

property with the specified name and interface.

1294

636

"""

1295

for cls in self.__class__.__mro__:

1296

for name, value in inspect.getmembers(

1297

cls, self._is_dbus_thing("property")):

1298

if (value._dbus_name == property_name

1299

and value._dbus_interface == interface_name):

1300

return value.__get__(self)

1301

637

for name in (property_name,

638

property_name + "_dbus_property"):

639

prop = getattr(self, name, None)

640

if (prop is None

641

or not self._is_dbus_property(prop)

642

or prop._dbus_name != property_name

643

or (interface_name and prop._dbus_interface

644

and interface_name != prop._dbus_interface)):

645

continue

646

return prop

1302

647

# No such property

1303

raise DBusPropertyNotFound("{}:{}.{}".format(

1304

self.dbus_object_path, interface_name, property_name))

1305

1306

@classmethod

1307

def _get_all_interface_names(cls):

1308

"""Get a sequence of all interfaces supported by an object"""

1309

return (name for name in set(getattr(getattr(x, attr),

1310

"_dbus_interface", None)

1311

for x in (inspect.getmro(cls))

1312

for attr in dir(x))

1313

if name is not None)

1314

1315

@dbus.service.method(dbus.PROPERTIES_IFACE,

1316

in_signature="ss",

648

raise DBusPropertyNotFound(self.dbus_object_path + ":"

649

+ interface_name + "."

650

+ property_name)

651

652

@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",

1317

653

out_signature="v")

1318

654

def Get(self, interface_name, property_name):

1319

655

"""Standard D-Bus property Get() method, see D-Bus standard.

1337

673

# The byte_arrays option is not supported yet on

1338

674

# signatures other than "ay".

1339

675

if prop._dbus_signature != "ay":

1340

raise ValueError("Byte arrays not supported for non-"

1341

"'ay' signature {!r}"

1342

.format(prop._dbus_signature))

1343

value = dbus.ByteArray(b''.join(chr(byte)

1344

for byte in value))

676

raise ValueError

677

value = dbus.ByteArray(''.join(unichr(byte)

678

for byte in value))

1345

679

prop(value)

1346

680

1347

@dbus.service.method(dbus.PROPERTIES_IFACE,

1348

in_signature="s",

681

@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",

1349

682

out_signature="a{sv}")

1350

683

def GetAll(self, interface_name):

1351

684

"""Standard D-Bus property GetAll() method, see D-Bus

1353

686

1354

687

Note: Will not include properties with access="write".

1355

688

"""

1356

properties = {}

1357

for name, prop in self._get_all_dbus_things("property"):

689

all = {}

690

for name, prop in self._get_all_dbus_properties():

1358

691

if (interface_name

1359

692

and interface_name != prop._dbus_interface):

1360

693

# Interface non-empty but did not match

1364

697

continue

1365

698

value = prop()

1366

699

if not hasattr(value, "variant_level"):

1367

properties[name] = value

700

all[name] = value

1368

701

continue

1369

properties[name] = type(value)(

1370

value, variant_level = value.variant_level + 1)

1371

return dbus.Dictionary(properties, signature="sv")

1372

1373

@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")

1374

def PropertiesChanged(self, interface_name, changed_properties,

1375

invalidated_properties):

1376

"""Standard D-Bus PropertiesChanged() signal, see D-Bus

1377

standard.

1378

"""

1379

pass

702

all[name] = type(value)(value, variant_level=

703

value.variant_level+1)

704

return dbus.Dictionary(all, signature="sv")

1380

705

1381

706

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1382

707

out_signature="s",

1383

708

path_keyword='object_path',

1384

709

connection_keyword='connection')

1385

710

def Introspect(self, object_path, connection):

1386

"""Overloading of standard D-Bus method.

1387

1388

Inserts property tags and interface annotation tags.

711

"""Standard D-Bus method, overloaded to insert property tags.

1389

712

"""

1390

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1391

object_path,

1392

connection)

713

xmlstring = dbus.service.Object.Introspect(self, object_path,

714

connection)

1393

715

try:

1394

716

document = xml.dom.minidom.parseString(xmlstring)

1395

1396

717

def make_tag(document, name, prop):

1397

718

e = document.createElement("property")

1398

719

e.setAttribute("name", name)

1399

720

e.setAttribute("type", prop._dbus_signature)

1400

721

e.setAttribute("access", prop._dbus_access)

1401

722

return e

1402

1403

723

for if_tag in document.getElementsByTagName("interface"):

1404

# Add property tags

1405

724

for tag in (make_tag(document, name, prop)

1406

725

for name, prop

1407

in self._get_all_dbus_things("property")

726

in self._get_all_dbus_properties()

1408

727

if prop._dbus_interface

1409

728

== if_tag.getAttribute("name")):

1410

729

if_tag.appendChild(tag)

1411

# Add annotation tags for properties

1412

for tag in if_tag.getElementsByTagName("property"):

1413

annots = dict()

1414

for name, prop in self._get_all_dbus_things(

1415

"property"):

1416

if (name == tag.getAttribute("name")

1417

and prop._dbus_interface

1418

== if_tag.getAttribute("name")):

1419

annots.update(getattr(

1420

prop, "_dbus_annotations", {}))

1421

for name, value in annots.items():

1422

ann_tag = document.createElement(

1423

"annotation")

1424

ann_tag.setAttribute("name", name)

1425

ann_tag.setAttribute("value", value)

1426

tag.appendChild(ann_tag)

1427

730

# Add the names to the return values for the

1428

731

# "org.freedesktop.DBus.Properties" methods

1429

732

if (if_tag.getAttribute("name")

1444

747

except (AttributeError, xml.dom.DOMException,

1445

748

xml.parsers.expat.ExpatError) as error:

1446

749

logger.error("Failed to override Introspection method",

1447

exc_info=error)

1448

return xmlstring

1449

1450

try:

1451

dbus.OBJECT_MANAGER_IFACE

1452

except AttributeError:

1453

dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"

1454

1455

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1456

"""A D-Bus object with an ObjectManager.

1457

1458

Classes inheriting from this exposes the standard

1459

GetManagedObjects call and the InterfacesAdded and

1460

InterfacesRemoved signals on the standard

1461

"org.freedesktop.DBus.ObjectManager" interface.

1462

1463

Note: No signals are sent automatically; they must be sent

1464

manually.

1465

"""

1466

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1467

out_signature = "a{oa{sa{sv}}}")

1468

def GetManagedObjects(self):

1469

"""This function must be overridden"""

1470

raise NotImplementedError()

1471

1472

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1473

signature = "oa{sa{sv}}")

1474

def InterfacesAdded(self, object_path, interfaces_and_properties):

1475

pass

1476

1477

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")

1478

def InterfacesRemoved(self, object_path, interfaces):

1479

pass

1480

1481

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1482

out_signature = "s",

1483

path_keyword = 'object_path',

1484

connection_keyword = 'connection')

1485

def Introspect(self, object_path, connection):

1486

"""Overloading of standard D-Bus method.

1487

1488

Override return argument name of GetManagedObjects to be

1489

"objpath_interfaces_and_properties"

1490

"""

1491

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1492

object_path,

1493

connection)

1494

try:

1495

document = xml.dom.minidom.parseString(xmlstring)

1496

1497

for if_tag in document.getElementsByTagName("interface"):

1498

# Fix argument name for the GetManagedObjects method

1499

if (if_tag.getAttribute("name")

1500

== dbus.OBJECT_MANAGER_IFACE):

1501

for cn in if_tag.getElementsByTagName("method"):

1502

if (cn.getAttribute("name")

1503

== "GetManagedObjects"):

1504

for arg in cn.getElementsByTagName("arg"):

1505

if (arg.getAttribute("direction")

1506

== "out"):

1507

arg.setAttribute(

1508

"name",

1509

"objpath_interfaces"

1510

"_and_properties")

1511

xmlstring = document.toxml("utf-8")

1512

document.unlink()

1513

except (AttributeError, xml.dom.DOMException,

1514

xml.parsers.expat.ExpatError) as error:

1515

logger.error("Failed to override Introspection method",

1516

exc_info = error)

1517

return xmlstring

1518

1519

def datetime_to_dbus(dt, variant_level=0):

750

error)

751

return xmlstring

752

753

754

def datetime_to_dbus (dt, variant_level=0):

1520

755

"""Convert a UTC datetime.datetime() to a D-Bus type."""

1521

756

if dt is None:

1522

757

return dbus.String("", variant_level = variant_level)

1523

return dbus.String(dt.isoformat(), variant_level=variant_level)

1524

1525

1526

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1527

"""A class decorator; applied to a subclass of

1528

dbus.service.Object, it will add alternate D-Bus attributes with

1529

interface names according to the "alt_interface_names" mapping.

1530

Usage:

1531

1532

@alternate_dbus_interfaces({"org.example.Interface":

1533

"net.example.AlternateInterface"})

1534

class SampleDBusObject(dbus.service.Object):

1535

@dbus.service.method("org.example.Interface")

1536

def SampleDBusMethod():

1537

pass

1538

1539

The above "SampleDBusMethod" on "SampleDBusObject" will be

1540

reachable via two interfaces: "org.example.Interface" and

1541

"net.example.AlternateInterface", the latter of which will have

1542

its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to

1543

"true", unless "deprecate" is passed with a False value.

1544

1545

This works for methods and signals, and also for D-Bus properties

1546

(from DBusObjectWithProperties) and interfaces (from the

1547

dbus_interface_annotations decorator).

1548

"""

1549

1550

def wrapper(cls):

1551

for orig_interface_name, alt_interface_name in (

1552

alt_interface_names.items()):

1553

attr = {}

1554

interface_names = set()

1555

# Go though all attributes of the class

1556

for attrname, attribute in inspect.getmembers(cls):

1557

# Ignore non-D-Bus attributes, and D-Bus attributes

1558

# with the wrong interface name

1559

if (not hasattr(attribute, "_dbus_interface")

1560

or not attribute._dbus_interface.startswith(

1561

orig_interface_name)):

1562

continue

1563

# Create an alternate D-Bus interface name based on

1564

# the current name

1565

alt_interface = attribute._dbus_interface.replace(

1566

orig_interface_name, alt_interface_name)

1567

interface_names.add(alt_interface)

1568

# Is this a D-Bus signal?

1569

if getattr(attribute, "_dbus_is_signal", False):

1570

# Extract the original non-method undecorated

1571

# function by black magic

1572

if sys.version_info.major == 2:

1573

nonmethod_func = (dict(

1574

zip(attribute.func_code.co_freevars,

1575

attribute.__closure__))

1576

["func"].cell_contents)

1577

else:

1578

nonmethod_func = (dict(

1579

zip(attribute.__code__.co_freevars,

1580

attribute.__closure__))

1581

["func"].cell_contents)

1582

# Create a new, but exactly alike, function

1583

# object, and decorate it to be a new D-Bus signal

1584

# with the alternate D-Bus interface name

1585

new_function = copy_function(nonmethod_func)

1586

new_function = (dbus.service.signal(

1587

alt_interface,

1588

attribute._dbus_signature)(new_function))

1589

# Copy annotations, if any

1590

try:

1591

new_function._dbus_annotations = dict(

1592

attribute._dbus_annotations)

1593

except AttributeError:

1594

pass

1595

# Define a creator of a function to call both the

1596

# original and alternate functions, so both the

1597

# original and alternate signals gets sent when

1598

# the function is called

1599

def fixscope(func1, func2):

1600

"""This function is a scope container to pass

1601

func1 and func2 to the "call_both" function

1602

outside of its arguments"""

1603

1604

@functools.wraps(func2)

1605

def call_both(*args, **kwargs):

1606

"""This function will emit two D-Bus

1607

signals by calling func1 and func2"""

1608

func1(*args, **kwargs)

1609

func2(*args, **kwargs)

1610

# Make wrapper function look like a D-Bus signal

1611

for name, attr in inspect.getmembers(func2):

1612

if name.startswith("_dbus_"):

1613

setattr(call_both, name, attr)

1614

1615

return call_both

1616

# Create the "call_both" function and add it to

1617

# the class

1618

attr[attrname] = fixscope(attribute, new_function)

1619

# Is this a D-Bus method?

1620

elif getattr(attribute, "_dbus_is_method", False):

1621

# Create a new, but exactly alike, function

1622

# object. Decorate it to be a new D-Bus method

1623

# with the alternate D-Bus interface name. Add it

1624

# to the class.

1625

attr[attrname] = (

1626

dbus.service.method(

1627

alt_interface,

1628

attribute._dbus_in_signature,

1629

attribute._dbus_out_signature)

1630

(copy_function(attribute)))

1631

# Copy annotations, if any

1632

try:

1633

attr[attrname]._dbus_annotations = dict(

1634

attribute._dbus_annotations)

1635

except AttributeError:

1636

pass

1637

# Is this a D-Bus property?

1638

elif getattr(attribute, "_dbus_is_property", False):

1639

# Create a new, but exactly alike, function

1640

# object, and decorate it to be a new D-Bus

1641

# property with the alternate D-Bus interface

1642

# name. Add it to the class.

1643

attr[attrname] = (dbus_service_property(

1644

alt_interface, attribute._dbus_signature,

1645

attribute._dbus_access,

1646

attribute._dbus_get_args_options

1647

["byte_arrays"])

1648

(copy_function(attribute)))

1649

# Copy annotations, if any

1650

try:

1651

attr[attrname]._dbus_annotations = dict(

1652

attribute._dbus_annotations)

1653

except AttributeError:

1654

pass

1655

# Is this a D-Bus interface?

1656

elif getattr(attribute, "_dbus_is_interface", False):

1657

# Create a new, but exactly alike, function

1658

# object. Decorate it to be a new D-Bus interface

1659

# with the alternate D-Bus interface name. Add it

1660

# to the class.

1661

attr[attrname] = (

1662

dbus_interface_annotations(alt_interface)

1663

(copy_function(attribute)))

1664

if deprecate:

1665

# Deprecate all alternate interfaces

1666

iname="_AlternateDBusNames_interface_annotation{}"

1667

for interface_name in interface_names:

1668

1669

@dbus_interface_annotations(interface_name)

1670

def func(self):

1671

return { "org.freedesktop.DBus.Deprecated":

1672

"true" }

1673

# Find an unused name

1674

for aname in (iname.format(i)

1675

for i in itertools.count()):

1676

if aname not in attr:

1677

attr[aname] = func

1678

break

1679

if interface_names:

1680

# Replace the class with a new subclass of it with

1681

# methods, signals, etc. as created above.

1682

if sys.version_info.major == 2:

1683

cls = type(b"{}Alternate".format(cls.__name__),

1684

(cls, ), attr)

1685

else:

1686

cls = type("{}Alternate".format(cls.__name__),

1687

(cls, ), attr)

1688

return cls

1689

1690

return wrapper

1691

1692

1693

@alternate_dbus_interfaces({"se.recompile.Mandos":

1694

"se.bsnet.fukt.Mandos"})

758

return dbus.String(dt.isoformat(),

759

variant_level=variant_level)

760

761

1695

762

class ClientDBus(Client, DBusObjectWithProperties):

1696

763

"""A Client class using D-Bus

1697

764

1701

768

"""

1702

769

1703

770

runtime_expansions = (Client.runtime_expansions

1704

+ ("dbus_object_path", ))

1705

1706

_interface = "se.recompile.Mandos.Client"

771

+ ("dbus_object_path",))

1707

772

1708

773

# dbus.service.Object doesn't use super(), so we can't either.

1709

774

1710

775

def __init__(self, bus = None, *args, **kwargs):

776

self._approvals_pending = 0

1711

777

self.bus = bus

1712

778

Client.__init__(self, *args, **kwargs)

1713

779

# Only now, when this client is initialized, can it show up on

1714

780

# the D-Bus

1715

client_object_name = str(self.name).translate(

781

client_object_name = unicode(self.name).translate(

1716

782

{ord("."): ord("_"),

1717

783

ord("-"): ord("_")})

1718

self.dbus_object_path = dbus.ObjectPath(

1719

"/clients/" + client_object_name)

784

self.dbus_object_path = (dbus.ObjectPath

785

("/clients/" + client_object_name))

1720

786

DBusObjectWithProperties.__init__(self, self.bus,

1721

787

self.dbus_object_path)

1722

1723

def notifychangeproperty(transform_func, dbus_name,

1724

type_func=lambda x: x,

1725

variant_level=1,

1726

invalidate_only=False,

1727

_interface=_interface):

1728

""" Modify a variable so that it's a property which announces

1729

its changes to DBus.

1730

788

1731

transform_fun: Function that takes a value and a variant_level

1732

and transforms it to a D-Bus type.

1733

dbus_name: D-Bus name of the variable

789

def notifychangeproperty(transform_func,

790

dbus_name, type_func=lambda x: x,

791

variant_level=1):

792

""" Modify a variable so that its a property that announce its

793

changes to DBus.

794

transform_fun: Function that takes a value and transform it to

795

DBus type.

796

dbus_name: DBus name of the variable

1734

797

type_func: Function that transform the value before sending it

1735

to the D-Bus. Default: no transform

1736

variant_level: D-Bus variant level. Default: 1

798

to DBus

799

variant_level: DBus variant level. default: 1

1737

800

"""

1738

attrname = "_{}".format(dbus_name)

1739

801

real_value = [None,]

1740

802

def setter(self, value):

803

old_value = real_value[0]

804

real_value[0] = value

1741

805

if hasattr(self, "dbus_object_path"):

1742

if (not hasattr(self, attrname) or

1743

type_func(getattr(self, attrname, None))

1744

!= type_func(value)):

1745

if invalidate_only:

1746

self.PropertiesChanged(

1747

_interface, dbus.Dictionary(),

1748

dbus.Array((dbus_name, )))

1749

else:

1750

dbus_value = transform_func(

1751

type_func(value),

1752

variant_level = variant_level)

1753

self.PropertyChanged(dbus.String(dbus_name),

1754

dbus_value)

1755

self.PropertiesChanged(

1756

_interface,

1757

dbus.Dictionary({ dbus.String(dbus_name):

1758

dbus_value }),

1759

dbus.Array())

1760

setattr(self, attrname, value)

806

if type_func(old_value) != type_func(real_value[0]):

807

dbus_value = transform_func(type_func(real_value[0]),

808

variant_level)

809

self.PropertyChanged(dbus.String(dbus_name),

810

dbus_value)

1761

811

1762

return property(lambda self: getattr(self, attrname), setter)

812

return property(lambda self: real_value[0], setter)

813

1763

814

1764

815

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1765

816

approvals_pending = notifychangeproperty(dbus.Boolean,

1768

819

enabled = notifychangeproperty(dbus.Boolean, "Enabled")

1769

820

last_enabled = notifychangeproperty(datetime_to_dbus,

1770

821

"LastEnabled")

1771

checker = notifychangeproperty(

1772

dbus.Boolean, "CheckerRunning",

1773

type_func = lambda checker: checker is not None)

822

checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",

823

type_func = lambda checker: checker is not None)

1774

824

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1775

825

"LastCheckedOK")

1776

last_checker_status = notifychangeproperty(dbus.Int16,

1777

"LastCheckerStatus")

1778

last_approval_request = notifychangeproperty(

1779

datetime_to_dbus, "LastApprovalRequest")

826

last_approval_request = notifychangeproperty(datetime_to_dbus,

827

"LastApprovalRequest")

1780

828

approved_by_default = notifychangeproperty(dbus.Boolean,

1781

829

"ApprovedByDefault")

1782

approval_delay = notifychangeproperty(

1783

dbus.UInt64, "ApprovalDelay",

1784

type_func = lambda td: td.total_seconds() * 1000)

1785

approval_duration = notifychangeproperty(

1786

dbus.UInt64, "ApprovalDuration",

1787

type_func = lambda td: td.total_seconds() * 1000)

830

approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",

831

type_func = _timedelta_to_milliseconds)

832

approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",

833

type_func = _timedelta_to_milliseconds)

1788

834

host = notifychangeproperty(dbus.String, "Host")

1789

timeout = notifychangeproperty(

1790

dbus.UInt64, "Timeout",

1791

type_func = lambda td: td.total_seconds() * 1000)

1792

extended_timeout = notifychangeproperty(

1793

dbus.UInt64, "ExtendedTimeout",

1794

type_func = lambda td: td.total_seconds() * 1000)

1795

interval = notifychangeproperty(

1796

dbus.UInt64, "Interval",

1797

type_func = lambda td: td.total_seconds() * 1000)

835

timeout = notifychangeproperty(dbus.UInt16, "Timeout",

836

type_func = _timedelta_to_milliseconds)

837

extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",

838

type_func = _timedelta_to_milliseconds)

839

interval = notifychangeproperty(dbus.UInt16, "Interval",

840

type_func = _timedelta_to_milliseconds)

1798

841

checker_command = notifychangeproperty(dbus.String, "Checker")

1799

secret = notifychangeproperty(dbus.ByteArray, "Secret",

1800

invalidate_only=True)

1801

842

1802

843

del notifychangeproperty

1803

844

1810

851

DBusObjectWithProperties.__del__(self, *args, **kwargs)

1811

852

Client.__del__(self, *args, **kwargs)

1812

853

1813

def checker_callback(self, source, condition,

1814

connection, command, *args, **kwargs):

1815

ret = Client.checker_callback(self, source, condition,

1816

connection, command, *args,

1817

**kwargs)

1818

exitstatus = self.last_checker_status

1819

if exitstatus >= 0:

854

def checker_callback(self, pid, condition, command,

855

*args, **kwargs):

856

self.checker_callback_tag = None

857

self.checker = None

858

if os.WIFEXITED(condition):

859

exitstatus = os.WEXITSTATUS(condition)

1820

860

# Emit D-Bus signal

1821

861

self.CheckerCompleted(dbus.Int16(exitstatus),

1822

# This is specific to GNU libC

1823

dbus.Int64(exitstatus << 8),

862

dbus.Int64(condition),

1824

863

dbus.String(command))

1825

864

else:

1826

865

# Emit D-Bus signal

1827

866

self.CheckerCompleted(dbus.Int16(-1),

1828

dbus.Int64(

1829

# This is specific to GNU libC

1830

(exitstatus << 8)

1831

| self.last_checker_signal),

867

dbus.Int64(condition),

1832

868

dbus.String(command))

1833

return ret

869

870

return Client.checker_callback(self, pid, condition, command,

871

*args, **kwargs)

1834

872

1835

873

def start_checker(self, *args, **kwargs):

1836

old_checker_pid = getattr(self.checker, "pid", None)

874

old_checker = self.checker

875

if self.checker is not None:

876

old_checker_pid = self.checker.pid

877

else:

878

old_checker_pid = None

1837

879

r = Client.start_checker(self, *args, **kwargs)

1838

880

# Only if new checker process was started

1839

881

if (self.checker is not None

1843

885

return r

1844

886

1845

887

def _reset_approved(self):

1846

self.approved = None

888

self._approved = None

1847

889

return False

1848

890

1849

891

def approve(self, value=True):

1850

self.approved = value

1851

GLib.timeout_add(int(self.approval_duration.total_seconds()

1852

* 1000), self._reset_approved)

1853

892

self.send_changedstate()

893

self._approved = value

894

gobject.timeout_add(_timedelta_to_milliseconds

895

(self.approval_duration),

896

self._reset_approved)

897

1854

898

1855

899

## D-Bus methods, signals & properties

1856

1857

## Interfaces

900

_interface = "se.bsnet.fukt.Mandos.Client"

1858

901

1859

902

## Signals

1860

903

1871

914

pass

1872

915

1873

916

# PropertyChanged - signal

1874

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1875

917

@dbus.service.signal(_interface, signature="sv")

1876

918

def PropertyChanged(self, property, value):

1877

919

"D-Bus signal"

1911

953

self.checked_ok()

1912

954

1913

955

# Enable - method

1914

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1915

956

@dbus.service.method(_interface)

1916

957

def Enable(self):

1917

958

"D-Bus method"

1918

959

self.enable()

1919

960

1920

961

# StartChecker - method

1921

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1922

962

@dbus.service.method(_interface)

1923

963

def StartChecker(self):

1924

964

"D-Bus method"

1925

965

self.start_checker()

1926

966

1927

967

# Disable - method

1928

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1929

968

@dbus.service.method(_interface)

1930

969

def Disable(self):

1931

970

"D-Bus method"

1932

971

self.disable()

1933

972

1934

973

# StopChecker - method

1935

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1936

974

@dbus.service.method(_interface)

1937

975

def StopChecker(self):

1938

976

self.stop_checker()

1945

983

return dbus.Boolean(bool(self.approvals_pending))

1946

984

1947

985

# ApprovedByDefault - property

1948

@dbus_service_property(_interface,

1949

signature="b",

986

@dbus_service_property(_interface, signature="b",

1950

987

access="readwrite")

1951

988

def ApprovedByDefault_dbus_property(self, value=None):

1952

989

if value is None: # get

1954

991

self.approved_by_default = bool(value)

1955

992

1956

993

# ApprovalDelay - property

1957

@dbus_service_property(_interface,

1958

signature="t",

994

@dbus_service_property(_interface, signature="t",

1959

995

access="readwrite")

1960

996

def ApprovalDelay_dbus_property(self, value=None):

1961

997

if value is None: # get

1962

return dbus.UInt64(self.approval_delay.total_seconds()

1963

* 1000)

998

return dbus.UInt64(self.approval_delay_milliseconds())

1964

999

self.approval_delay = datetime.timedelta(0, 0, 0, value)

1965

1000

1966

1001

# ApprovalDuration - property

1967

@dbus_service_property(_interface,

1968

signature="t",

1002

@dbus_service_property(_interface, signature="t",

1969

1003

access="readwrite")

1970

1004

def ApprovalDuration_dbus_property(self, value=None):

1971

1005

if value is None: # get

1972

return dbus.UInt64(self.approval_duration.total_seconds()

1973

* 1000)

1006

return dbus.UInt64(_timedelta_to_milliseconds(

1007

self.approval_duration))

1974

1008

self.approval_duration = datetime.timedelta(0, 0, 0, value)

1975

1009

1976

1010

# Name - property

1977

@dbus_annotations(

1978

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1979

1011

@dbus_service_property(_interface, signature="s", access="read")

1980

1012

def Name_dbus_property(self):

1981

1013

return dbus.String(self.name)

1982

1014

1983

1015

# Fingerprint - property

1984

@dbus_annotations(

1985

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1986

1016

@dbus_service_property(_interface, signature="s", access="read")

1987

1017

def Fingerprint_dbus_property(self):

1988

1018

return dbus.String(self.fingerprint)

1989

1019

1990

1020

# Host - property

1991

@dbus_service_property(_interface,

1992

signature="s",

1021

@dbus_service_property(_interface, signature="s",

1993

1022

access="readwrite")

1994

1023

def Host_dbus_property(self, value=None):

1995

1024

if value is None: # get

1996

1025

return dbus.String(self.host)

1997

self.host = str(value)

1026

self.host = value

1998

1027

1999

1028

# Created - property

2000

@dbus_annotations(

2001

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

2002

1029

@dbus_service_property(_interface, signature="s", access="read")

2003

1030

def Created_dbus_property(self):

2004

return datetime_to_dbus(self.created)

1031

return dbus.String(datetime_to_dbus(self.created))

2005

1032

2006

1033

# LastEnabled - property

2007

1034

@dbus_service_property(_interface, signature="s", access="read")

2009

1036

return datetime_to_dbus(self.last_enabled)

2010

1037

2011

1038

# Enabled - property

2012

@dbus_service_property(_interface,

2013

signature="b",

1039

@dbus_service_property(_interface, signature="b",

2014

1040

access="readwrite")

2015

1041

def Enabled_dbus_property(self, value=None):

2016

1042

if value is None: # get

2021

1047

self.disable()

2022

1048

2023

1049

# LastCheckedOK - property

2024

@dbus_service_property(_interface,

2025

signature="s",

1050

@dbus_service_property(_interface, signature="s",

2026

1051

access="readwrite")

2027

1052

def LastCheckedOK_dbus_property(self, value=None):

2028

1053

if value is not None:

2030

1055

return

2031

1056

return datetime_to_dbus(self.last_checked_ok)

2032

1057

2033

# LastCheckerStatus - property

2034

@dbus_service_property(_interface, signature="n", access="read")

2035

def LastCheckerStatus_dbus_property(self):

2036

return dbus.Int16(self.last_checker_status)

2037

2038

1058

# Expires - property

2039

1059

@dbus_service_property(_interface, signature="s", access="read")

2040

1060

def Expires_dbus_property(self):

2046

1066

return datetime_to_dbus(self.last_approval_request)

2047

1067

2048

1068

# Timeout - property

2049

@dbus_service_property(_interface,

2050

signature="t",

1069

@dbus_service_property(_interface, signature="t",

2051

1070

access="readwrite")

2052

1071

def Timeout_dbus_property(self, value=None):

2053

1072

if value is None: # get

2054

return dbus.UInt64(self.timeout.total_seconds() * 1000)

2055

old_timeout = self.timeout

1073

return dbus.UInt64(self.timeout_milliseconds())

2056

1074

self.timeout = datetime.timedelta(0, 0, 0, value)

2057

# Reschedule disabling

2058

if self.enabled:

2059

now = datetime.datetime.utcnow()

2060

self.expires += self.timeout - old_timeout

2061

if self.expires <= now:

2062

# The timeout has passed

2063

self.disable()

2064

else:

2065

if (getattr(self, "disable_initiator_tag", None)

2066

is None):

2067

return

2068

GLib.source_remove(self.disable_initiator_tag)

2069

self.disable_initiator_tag = GLib.timeout_add(

2070

int((self.expires - now).total_seconds() * 1000),

2071

self.disable)

1075

if getattr(self, "disable_initiator_tag", None) is None:

1076

return

1077

# Reschedule timeout

1078

gobject.source_remove(self.disable_initiator_tag)

1079

self.disable_initiator_tag = None

1080

self.expires = None

1081

time_to_die = (self.

1082

_timedelta_to_milliseconds((self

1083

.last_checked_ok

1084

+ self.timeout)

1085

- datetime.datetime

1086

.utcnow()))

1087

if time_to_die <= 0:

1088

# The timeout has passed

1089

self.disable()

1090

else:

1091

self.expires = (datetime.datetime.utcnow()

1092

+ datetime.timedelta(milliseconds = time_to_die))

1093

self.disable_initiator_tag = (gobject.timeout_add

1094

(time_to_die, self.disable))

2072

1095

2073

1096

# ExtendedTimeout - property

2074

@dbus_service_property(_interface,

2075

signature="t",

1097

@dbus_service_property(_interface, signature="t",

2076

1098

access="readwrite")

2077

1099

def ExtendedTimeout_dbus_property(self, value=None):

2078

1100

if value is None: # get

2079

return dbus.UInt64(self.extended_timeout.total_seconds()

2080

* 1000)

1101

return dbus.UInt64(self.extended_timeout_milliseconds())

2081

1102

self.extended_timeout = datetime.timedelta(0, 0, 0, value)

2082

1103

2083

1104

# Interval - property

2084

@dbus_service_property(_interface,

2085

signature="t",

1105

@dbus_service_property(_interface, signature="t",

2086

1106

access="readwrite")

2087

1107

def Interval_dbus_property(self, value=None):

2088

1108

if value is None: # get

2089

return dbus.UInt64(self.interval.total_seconds() * 1000)

1109

return dbus.UInt64(self.interval_milliseconds())

2090

1110

self.interval = datetime.timedelta(0, 0, 0, value)

2091

1111

if getattr(self, "checker_initiator_tag", None) is None:

2092

1112

return

2093

if self.enabled:

2094

# Reschedule checker run

2095

GLib.source_remove(self.checker_initiator_tag)

2096

self.checker_initiator_tag = GLib.timeout_add(

2097

value, self.start_checker)

2098

self.start_checker() # Start one now, too

1113

# Reschedule checker run

1114

gobject.source_remove(self.checker_initiator_tag)

1115

self.checker_initiator_tag = (gobject.timeout_add

1116

(value, self.start_checker))

1117

self.start_checker() # Start one now, too

2099

1118

2100

1119

# Checker - property

2101

@dbus_service_property(_interface,

2102

signature="s",

1120

@dbus_service_property(_interface, signature="s",

2103

1121

access="readwrite")

2104

1122

def Checker_dbus_property(self, value=None):

2105

1123

if value is None: # get

2106

1124

return dbus.String(self.checker_command)

2107

self.checker_command = str(value)

1125

self.checker_command = value

2108

1126

2109

1127

# CheckerRunning - property

2110

@dbus_service_property(_interface,

2111

signature="b",

1128

@dbus_service_property(_interface, signature="b",

2112

1129

access="readwrite")

2113

1130

def CheckerRunning_dbus_property(self, value=None):

2114

1131

if value is None: # get

2119

1136

self.stop_checker()

2120

1137

2121

1138

# ObjectPath - property

2122

@dbus_annotations(

2123

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",

2124

"org.freedesktop.DBus.Deprecated": "true"})

2125

1139

@dbus_service_property(_interface, signature="o", access="read")

2126

1140

def ObjectPath_dbus_property(self):

2127

1141

return self.dbus_object_path # is already a dbus.ObjectPath

2128

1142

2129

1143

# Secret = property

2130

@dbus_annotations(

2131

{"org.freedesktop.DBus.Property.EmitsChangedSignal":

2132

"invalidates"})

2133

@dbus_service_property(_interface,

2134

signature="ay",

2135

access="write",

2136

byte_arrays=True)

1144

@dbus_service_property(_interface, signature="ay",

1145

access="write", byte_arrays=True)

2137

1146

def Secret_dbus_property(self, value):

2138

self.secret = bytes(value)

1147

self.secret = str(value)

2139

1148

2140

1149

del _interface

2141

1150

2145

1154

self._pipe = child_pipe

2146

1155

self._pipe.send(('init', fpr, address))

2147

1156

if not self._pipe.recv():

2148

raise KeyError(fpr)

1157

raise KeyError()

2149

1158

2150

1159

def __getattribute__(self, name):

2151

if name == '_pipe':

1160

if(name == '_pipe'):

2152

1161

return super(ProxyClient, self).__getattribute__(name)

2153

1162

self._pipe.send(('getattr', name))

2154

1163

data = self._pipe.recv()

2155

1164

if data[0] == 'data':

2156

1165

return data[1]

2157

1166

if data[0] == 'function':

2158

2159

1167

def func(*args, **kwargs):

2160

1168

self._pipe.send(('funcall', name, args, kwargs))

2161

1169

return self._pipe.recv()[1]

2162

2163

1170

return func

2164

1171

2165

1172

def __setattr__(self, name, value):

2166

if name == '_pipe':

1173

if(name == '_pipe'):

2167

1174

return super(ProxyClient, self).__setattr__(name, value)

2168

1175

self._pipe.send(('setattr', name, value))

2169

1176

2177

1184

def handle(self):

2178

1185

with contextlib.closing(self.server.child_pipe) as child_pipe:

2179

1186

logger.info("TCP connection from: %s",

2180

str(self.client_address))

1187

unicode(self.client_address))

2181

1188

logger.debug("Pipe FD: %d",

2182

1189

self.server.child_pipe.fileno())

2183

1190

2184

session = gnutls.ClientSession(self.request)

1191

session = (gnutls.connection

1192

.ClientSession(self.request,

1193

gnutls.connection

1194

.X509Credentials()))

1195

1196

# Note: gnutls.connection.X509Credentials is really a

1197

# generic GnuTLS certificate credentials object so long as

1198

# no X.509 keys are added to it. Therefore, we can use it

1199

# here despite using OpenPGP certificates.

2185

1200

2186

1201

#priority = ':'.join(("NONE", "+VERS-TLS1.1",

2187

1202

# "+AES-256-CBC", "+SHA1",

2191

1206

priority = self.server.gnutls_priority

2192

1207

if priority is None:

2193

1208

priority = "NORMAL"

2194

gnutls.priority_set_direct(session._c_object,

2195

priority.encode("utf-8"),

2196

None)

1209

(gnutls.library.functions

1210

.gnutls_priority_set_direct(session._c_object,

1211

priority, None))

2197

1212

2198

1213

# Start communication using the Mandos protocol

2199

1214

# Get protocol number

2201

1216

logger.debug("Protocol version: %r", line)

2202

1217

try:

2203

1218

if int(line.strip().split()[0]) > 1:

2204

raise RuntimeError(line)

1219

raise RuntimeError

2205

1220

except (ValueError, IndexError, RuntimeError) as error:

2206

1221

logger.error("Unknown protocol version: %s", error)

2207

1222

return

2209

1224

# Start GnuTLS connection

2210

1225

try:

2211

1226

session.handshake()

2212

except gnutls.Error as error:

1227

except gnutls.errors.GNUTLSError as error:

2213

1228

logger.warning("Handshake failed: %s", error)

2214

1229

# Do not run session.bye() here: the session is not

2215

1230

# established. Just abandon the request.

2219

1234

approval_required = False

2220

1235

try:

2221

1236

try:

2222

fpr = self.fingerprint(

2223

self.peer_certificate(session))

2224

except (TypeError, gnutls.Error) as error:

1237

fpr = self.fingerprint(self.peer_certificate

1238

(session))

1239

except (TypeError,

1240

gnutls.errors.GNUTLSError) as error:

2225

1241

logger.warning("Bad certificate: %s", error)

2226

1242

return

2227

1243

logger.debug("Fingerprint: %s", fpr)

2240

1256

while True:

2241

1257

if not client.enabled:

2242

1258

logger.info("Client %s is disabled",

2243

client.name)

1259

client.name)

2244

1260

if self.server.use_dbus:

2245

1261

# Emit D-Bus signal

2246

client.Rejected("Disabled")

1262

client.Rejected("Disabled")

2247

1263

return

2248

1264

2249

if client.approved or not client.approval_delay:

1265

if client._approved or not client.approval_delay:

2250

1266

#We are approved or approval is disabled

2251

1267

break

2252

elif client.approved is None:

1268

elif client._approved is None:

2253

1269

logger.info("Client %s needs approval",

2254

1270

client.name)

2255

1271

if self.server.use_dbus:

2256

1272

# Emit D-Bus signal

2257

1273

client.NeedApproval(

2258

client.approval_delay.total_seconds()

2259

* 1000, client.approved_by_default)

1274

client.approval_delay_milliseconds(),

1275

client.approved_by_default)

2260

1276

else:

2261

1277

logger.warning("Client %s was not approved",

2262

1278

client.name)

2266

1282

return

2267

1283

2268

1284

#wait until timeout or approved

1285

#x = float(client._timedelta_to_milliseconds(delay))

2269

1286

time = datetime.datetime.now()

2270

1287

client.changedstate.acquire()

2271

client.changedstate.wait(delay.total_seconds())

1288

client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))

2272

1289

client.changedstate.release()

2273

1290

time2 = datetime.datetime.now()

2274

1291

if (time2 - time) >= delay:

2285

1302

else:

2286

1303

delay -= time2 - time

2287

1304

2288

try:

2289

session.send(client.secret)

2290

except gnutls.Error as error:

2291

logger.warning("gnutls send failed",

2292

exc_info = error)

2293

return

1305

sent_size = 0

1306

while sent_size < len(client.secret):

1307

try:

1308

sent = session.send(client.secret[sent_size:])

1309

except gnutls.errors.GNUTLSError as error:

1310

logger.warning("gnutls send failed")

1311

return

1312

logger.debug("Sent: %d, remaining: %d",

1313

sent, len(client.secret)

1314

- (sent_size + sent))

1315

sent_size += sent

2294

1316

2295

1317

logger.info("Sending secret to %s", client.name)

2296

# bump the timeout using extended_timeout

2297

client.bump_timeout(client.extended_timeout)

1318

# bump the timeout as if seen

1319

client.checked_ok(client.extended_timeout)

2298

1320

if self.server.use_dbus:

2299

1321

# Emit D-Bus signal

2300

1322

client.GotSecret()

2304

1326

client.approvals_pending -= 1

2305

1327

try:

2306

1328

session.bye()

2307

except gnutls.Error as error:

2308

logger.warning("GnuTLS bye failed",

2309

exc_info=error)

1329

except gnutls.errors.GNUTLSError as error:

1330

logger.warning("GnuTLS bye failed")

2310

1331

2311

1332

@staticmethod

2312

1333

def peer_certificate(session):

2313

1334

"Return the peer's OpenPGP certificate as a bytestring"

2314

1335

# If not an OpenPGP certificate...

2315

if (gnutls.certificate_type_get(session._c_object)

2316

!= gnutls.CRT_OPENPGP):

2317

# ...return invalid data

2318

return b""

1336

if (gnutls.library.functions

1337

.gnutls_certificate_type_get(session._c_object)

1338

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1339

# ...do the normal thing

1340

return session.peer_certificate

2319

1341

list_size = ctypes.c_uint(1)

2320

cert_list = (gnutls.certificate_get_peers

1342

cert_list = (gnutls.library.functions

1343

.gnutls_certificate_get_peers

2321

1344

(session._c_object, ctypes.byref(list_size)))

2322

1345

if not bool(cert_list) and list_size.value != 0:

2323

raise gnutls.Error("error getting peer certificate")

1346

raise gnutls.errors.GNUTLSError("error getting peer"

1347

" certificate")

2324

1348

if list_size.value == 0:

2325

1349

return None

2326

1350

cert = cert_list[0]

2330

1354

def fingerprint(openpgp):

2331

1355

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2332

1356

# New GnuTLS "datum" with the OpenPGP public key

2333

datum = gnutls.datum_t(

2334

ctypes.cast(ctypes.c_char_p(openpgp),

2335

ctypes.POINTER(ctypes.c_ubyte)),

2336

ctypes.c_uint(len(openpgp)))

1357

datum = (gnutls.library.types

1358

.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),

1359

ctypes.POINTER

1360

(ctypes.c_ubyte)),

1361

ctypes.c_uint(len(openpgp))))

2337

1362

# New empty GnuTLS certificate

2338

crt = gnutls.openpgp_crt_t()

2339

gnutls.openpgp_crt_init(ctypes.byref(crt))

1363

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1364

(gnutls.library.functions

1365

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2340

1366

# Import the OpenPGP public key into the certificate

2341

gnutls.openpgp_crt_import(crt, ctypes.byref(datum),

2342

gnutls.OPENPGP_FMT_RAW)

1367

(gnutls.library.functions

1368

.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),

1369

gnutls.library.constants

1370

.GNUTLS_OPENPGP_FMT_RAW))

2343

1371

# Verify the self signature in the key

2344

1372

crtverify = ctypes.c_uint()

2345

gnutls.openpgp_crt_verify_self(crt, 0,

2346

ctypes.byref(crtverify))

1373

(gnutls.library.functions

1374

.gnutls_openpgp_crt_verify_self(crt, 0,

1375

ctypes.byref(crtverify)))

2347

1376

if crtverify.value != 0:

2348

gnutls.openpgp_crt_deinit(crt)

2349

raise gnutls.CertificateSecurityError("Verify failed")

1377

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1378

raise (gnutls.errors.CertificateSecurityError

1379

("Verify failed"))

2350

1380

# New buffer for the fingerprint

2351

1381

buf = ctypes.create_string_buffer(20)

2352

1382

buf_len = ctypes.c_size_t()

2353

1383

# Get the fingerprint from the certificate into the buffer

2354

gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),

2355

ctypes.byref(buf_len))

1384

(gnutls.library.functions

1385

.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),

1386

ctypes.byref(buf_len)))

2356

1387

# Deinit the certificate

2357

gnutls.openpgp_crt_deinit(crt)

1388

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2358

1389

# Convert the buffer to a Python bytestring

2359

1390

fpr = ctypes.string_at(buf, buf_len.value)

2360

1391

# Convert the bytestring to hexadecimal notation

2361

hex_fpr = binascii.hexlify(fpr).upper()

1392

hex_fpr = ''.join("%02X" % ord(char) for char in fpr)

2362

1393

return hex_fpr

2363

1394

2364

1395

2365

1396

class MultiprocessingMixIn(object):

2366

1397

"""Like socketserver.ThreadingMixIn, but with multiprocessing"""

2367

2368

1398

def sub_process_main(self, request, address):

2369

1399

try:

2370

1400

self.finish_request(request, address)

2371

except Exception:

1401

except:

2372

1402

self.handle_error(request, address)

2373

1403

self.close_request(request)

2374

1404

2375

1405

def process_request(self, request, address):

2376

1406

"""Start a new process to process the request."""

2377

proc = multiprocessing.Process(target = self.sub_process_main,

2378

args = (request, address))

2379

proc.start()

2380

return proc

1407

multiprocessing.Process(target = self.sub_process_main,

1408

args = (request, address)).start()

2381

1409

2382

1410

2383

1411

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2384

1412

""" adds a pipe to the MixIn """

2385

2386

1413

def process_request(self, request, client_address):

2387

1414

"""Overrides and wraps the original process_request().

2388

1415

2390

1417

"""

2391

1418

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2392

1419

2393

proc = MultiprocessingMixIn.process_request(self, request,

2394

client_address)

1420

super(MultiprocessingMixInWithPipe,

1421

self).process_request(request, client_address)

2395

1422

self.child_pipe.close()

2396

self.add_pipe(parent_pipe, proc)

1423

self.add_pipe(parent_pipe)

2397

1424

2398

def add_pipe(self, parent_pipe, proc):

1425

def add_pipe(self, parent_pipe):

2399

1426

"""Dummy function; override as necessary"""

2400

raise NotImplementedError()

1427

raise NotImplementedError

2401

1428

2402

1429

2403

1430

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2409

1436

interface: None or a network interface name (string)

2410

1437

use_ipv6: Boolean; to use IPv6 or not

2411

1438

"""

2412

2413

1439

def __init__(self, server_address, RequestHandlerClass,

2414

interface=None,

2415

use_ipv6=True,

2416

socketfd=None):

2417

"""If socketfd is set, use that file descriptor instead of

2418

creating a new one with socket.socket().

2419

"""

1440

interface=None, use_ipv6=True):

2420

1441

self.interface = interface

2421

1442

if use_ipv6:

2422

1443

self.address_family = socket.AF_INET6

2423

if socketfd is not None:

2424

# Save the file descriptor

2425

self.socketfd = socketfd

2426

# Save the original socket.socket() function

2427

self.socket_socket = socket.socket

2428

# To implement --socket, we monkey patch socket.socket.

2429

#

2430

# (When socketserver.TCPServer is a new-style class, we

2431

# could make self.socket into a property instead of monkey

2432

# patching socket.socket.)

2433

#

2434

# Create a one-time-only replacement for socket.socket()

2435

@functools.wraps(socket.socket)

2436

def socket_wrapper(*args, **kwargs):

2437

# Restore original function so subsequent calls are

2438

# not affected.

2439

socket.socket = self.socket_socket

2440

del self.socket_socket

2441

# This time only, return a new socket object from the

2442

# saved file descriptor.

2443

return socket.fromfd(self.socketfd, *args, **kwargs)

2444

# Replace socket.socket() function with wrapper

2445

socket.socket = socket_wrapper

2446

# The socketserver.TCPServer.__init__ will call

2447

# socket.socket(), which might be our replacement,

2448

# socket_wrapper(), if socketfd was set.

2449

1444

socketserver.TCPServer.__init__(self, server_address,

2450

1445

RequestHandlerClass)

2451

2452

1446

def server_bind(self):

2453

1447

"""This overrides the normal server_bind() function

2454

1448

to bind to an interface if one was specified, and also NOT to

2455

1449

bind to an address or port if they were not specified."""

2456

global SO_BINDTODEVICE

2457

1450

if self.interface is not None:

2458

1451

if SO_BINDTODEVICE is None:

2459

# Fall back to a hard-coded value which seems to be

2460

# common enough.

2461

logger.warning("SO_BINDTODEVICE not found, trying 25")

2462

SO_BINDTODEVICE = 25

2463

try:

2464

self.socket.setsockopt(

2465

socket.SOL_SOCKET, SO_BINDTODEVICE,

2466

(self.interface + "\0").encode("utf-8"))

2467

except socket.error as error:

2468

if error.errno == errno.EPERM:

2469

logger.error("No permission to bind to"

2470

" interface %s", self.interface)

2471

elif error.errno == errno.ENOPROTOOPT:

2472

logger.error("SO_BINDTODEVICE not available;"

2473

" cannot bind to interface %s",

2474

self.interface)

2475

elif error.errno == errno.ENODEV:

2476

logger.error("Interface %s does not exist,"

2477

" cannot bind", self.interface)

2478

else:

2479

raise

1452

logger.error("SO_BINDTODEVICE does not exist;"

1453

" cannot bind to interface %s",

1454

self.interface)

1455

else:

1456

try:

1457

self.socket.setsockopt(socket.SOL_SOCKET,

1458

SO_BINDTODEVICE,

1459

str(self.interface

1460

+ '\0'))

1461

except socket.error as error:

1462

if error[0] == errno.EPERM:

1463

logger.error("No permission to"

1464

" bind to interface %s",

1465

self.interface)

1466

elif error[0] == errno.ENOPROTOOPT:

1467

logger.error("SO_BINDTODEVICE not available;"

1468

" cannot bind to interface %s",

1469

self.interface)

1470

else:

1471

raise

2480

1472

# Only bind(2) the socket if we really need to.

2481

1473

if self.server_address[0] or self.server_address[1]:

2482

1474

if not self.server_address[0]:

2483

1475

if self.address_family == socket.AF_INET6:

2484

1476

any_address = "::" # in6addr_any

2485

1477

else:

2486

any_address = "0.0.0.0" # INADDR_ANY

1478

any_address = socket.INADDR_ANY

2487

1479

self.server_address = (any_address,

2488

1480

self.server_address[1])

2489

1481

elif not self.server_address[1]:

2490

self.server_address = (self.server_address[0], 0)

1482

self.server_address = (self.server_address[0],

1483

0)

2491

1484

# if self.interface:

2492

1485

# self.server_address = (self.server_address[0],

2493

1486

# 0, # port

2505

1498

gnutls_priority GnuTLS priority string

2506

1499

use_dbus: Boolean; to emit D-Bus signals or not

2507

1500

2508

Assumes a GLib.MainLoop event loop.

1501

Assumes a gobject.MainLoop event loop.

2509

1502

"""

2510

2511

1503

def __init__(self, server_address, RequestHandlerClass,

2512

interface=None,

2513

use_ipv6=True,

2514

clients=None,

2515

gnutls_priority=None,

2516

use_dbus=True,

2517

socketfd=None):

1504

interface=None, use_ipv6=True, clients=None,

1505

gnutls_priority=None, use_dbus=True):

2518

1506

self.enabled = False

2519

1507

self.clients = clients

2520

1508

if self.clients is None:

2521

self.clients = {}

1509

self.clients = set()

2522

1510

self.use_dbus = use_dbus

2523

1511

self.gnutls_priority = gnutls_priority

2524

1512

IPv6_TCPServer.__init__(self, server_address,

2525

1513

RequestHandlerClass,

2526

1514

interface = interface,

2527

use_ipv6 = use_ipv6,

2528

socketfd = socketfd)

2529

1515

use_ipv6 = use_ipv6)

2530

1516

def server_activate(self):

2531

1517

if self.enabled:

2532

1518

return socketserver.TCPServer.server_activate(self)

2533

2534

1519

def enable(self):

2535

1520

self.enabled = True

2536

2537

def add_pipe(self, parent_pipe, proc):

1521

def add_pipe(self, parent_pipe):

2538

1522

# Call "handle_ipc" for both data and EOF events

2539

GLib.io_add_watch(

2540

parent_pipe.fileno(),

2541

GLib.IO_IN | GLib.IO_HUP,

2542

functools.partial(self.handle_ipc,

2543

parent_pipe = parent_pipe,

2544

proc = proc))

2545

2546

def handle_ipc(self, source, condition,

2547

parent_pipe=None,

2548

proc = None,

1523

gobject.io_add_watch(parent_pipe.fileno(),

1524

gobject.IO_IN | gobject.IO_HUP,

1525

functools.partial(self.handle_ipc,

1526

parent_pipe = parent_pipe))

1527

1528

def handle_ipc(self, source, condition, parent_pipe=None,

2549

1529

client_object=None):

2550

# error, or the other end of multiprocessing.Pipe has closed

2551

if condition & (GLib.IO_ERR | GLib.IO_HUP):

2552

# Wait for other process to exit

2553

proc.join()

1530

condition_names = {

1531

gobject.IO_IN: "IN", # There is data to read.

1532

gobject.IO_OUT: "OUT", # Data can be written (without

1533

# blocking).

1534

gobject.IO_PRI: "PRI", # There is urgent data to read.

1535

gobject.IO_ERR: "ERR", # Error condition.

1536

gobject.IO_HUP: "HUP" # Hung up (the connection has been

1537

# broken, usually for pipes and

1538

# sockets).

1539

}

1540

conditions_string = ' | '.join(name

1541

for cond, name in

1542

condition_names.iteritems()

1543

if cond & condition)

1544

# error or the other end of multiprocessing.Pipe has closed

1545

if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):

2554

1546

return False

2555

1547

2556

1548

# Read a request from the child

2561

1553

fpr = request[1]

2562

1554

address = request[2]

2563

1555

2564

for c in self.clients.values():

1556

for c in self.clients:

2565

1557

if c.fingerprint == fpr:

2566

1558

client = c

2567

1559

break

2570

1562

"dress: %s", fpr, address)

2571

1563

if self.use_dbus:

2572

1564

# Emit D-Bus signal

2573

mandos_dbus_service.ClientNotFound(fpr,

2574

address[0])

1565

mandos_dbus_service.ClientNotFound(fpr, address[0])

2575

1566

parent_pipe.send(False)

2576

1567

return False

2577

1568

2578

GLib.io_add_watch(

2579

parent_pipe.fileno(),

2580

GLib.IO_IN | GLib.IO_HUP,

2581

functools.partial(self.handle_ipc,

2582

parent_pipe = parent_pipe,

2583

proc = proc,

2584

client_object = client))

1569

gobject.io_add_watch(parent_pipe.fileno(),

1570

gobject.IO_IN | gobject.IO_HUP,

1571

functools.partial(self.handle_ipc,

1572

parent_pipe = parent_pipe,

1573

client_object = client))

2585

1574

parent_pipe.send(True)

2586

# remove the old hook in favor of the new above hook on

2587

# same fileno

1575

# remove the old hook in favor of the new above hook on same fileno

2588

1576

return False

2589

1577

if command == 'funcall':

2590

1578

funcname = request[1]

2591

1579

args = request[2]

2592

1580

kwargs = request[3]

2593

1581

2594

parent_pipe.send(('data', getattr(client_object,

2595

funcname)(*args,

2596

**kwargs)))

1582

parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))

2597

1583

2598

1584

if command == 'getattr':

2599

1585

attrname = request[1]

2600

if isinstance(client_object.__getattribute__(attrname),

2601

collections.Callable):

2602

parent_pipe.send(('function', ))

1586

if callable(client_object.__getattribute__(attrname)):

1587

parent_pipe.send(('function',))

2603

1588

else:

2604

parent_pipe.send((

2605

'data', client_object.__getattribute__(attrname)))

1589

parent_pipe.send(('data', client_object.__getattribute__(attrname)))

2606

1590

2607

1591

if command == 'setattr':

2608

1592

attrname = request[1]

2612

1596

return True

2613

1597

2614

1598

2615

def rfc3339_duration_to_delta(duration):

2616

"""Parse an RFC 3339 "duration" and return a datetime.timedelta

2617

2618

>>> rfc3339_duration_to_delta("P7D")

2619

datetime.timedelta(7)

2620

>>> rfc3339_duration_to_delta("PT60S")

2621

datetime.timedelta(0, 60)

2622

>>> rfc3339_duration_to_delta("PT60M")

2623

datetime.timedelta(0, 3600)

2624

>>> rfc3339_duration_to_delta("PT24H")

2625

datetime.timedelta(1)

2626

>>> rfc3339_duration_to_delta("P1W")

2627

datetime.timedelta(7)

2628

>>> rfc3339_duration_to_delta("PT5M30S")

2629

datetime.timedelta(0, 330)

2630

>>> rfc3339_duration_to_delta("P1DT3M20S")

2631

datetime.timedelta(1, 200)

2632

"""

2633

2634

# Parsing an RFC 3339 duration with regular expressions is not

2635

# possible - there would have to be multiple places for the same

2636

# values, like seconds. The current code, while more esoteric, is

2637

# cleaner without depending on a parsing library. If Python had a

2638

# built-in library for parsing we would use it, but we'd like to

2639

# avoid excessive use of external libraries.

2640

2641

# New type for defining tokens, syntax, and semantics all-in-one

2642

Token = collections.namedtuple("Token", (

2643

"regexp", # To match token; if "value" is not None, must have

2644

# a "group" containing digits

2645

"value", # datetime.timedelta or None

2646

"followers")) # Tokens valid after this token

2647

# RFC 3339 "duration" tokens, syntax, and semantics; taken from

2648

# the "duration" ABNF definition in RFC 3339, Appendix A.

2649

token_end = Token(re.compile(r"$"), None, frozenset())

2650

token_second = Token(re.compile(r"(\d+)S"),

2651

datetime.timedelta(seconds=1),

2652

frozenset((token_end, )))

2653

token_minute = Token(re.compile(r"(\d+)M"),

2654

datetime.timedelta(minutes=1),

2655

frozenset((token_second, token_end)))

2656

token_hour = Token(re.compile(r"(\d+)H"),

2657

datetime.timedelta(hours=1),

2658

frozenset((token_minute, token_end)))

2659

token_time = Token(re.compile(r"T"),

2660

None,

2661

frozenset((token_hour, token_minute,

2662

token_second)))

2663

token_day = Token(re.compile(r"(\d+)D"),

2664

datetime.timedelta(days=1),

2665

frozenset((token_time, token_end)))

2666

token_month = Token(re.compile(r"(\d+)M"),

2667

datetime.timedelta(weeks=4),

2668

frozenset((token_day, token_end)))

2669

token_year = Token(re.compile(r"(\d+)Y"),

2670

datetime.timedelta(weeks=52),

2671

frozenset((token_month, token_end)))

2672

token_week = Token(re.compile(r"(\d+)W"),

2673

datetime.timedelta(weeks=1),

2674

frozenset((token_end, )))

2675

token_duration = Token(re.compile(r"P"), None,

2676

frozenset((token_year, token_month,

2677

token_day, token_time,

2678

token_week)))

2679

# Define starting values

2680

value = datetime.timedelta() # Value so far

2681

found_token = None

2682

followers = frozenset((token_duration, )) # Following valid tokens

2683

s = duration # String left to parse

2684

# Loop until end token is found

2685

while found_token is not token_end:

2686

# Search for any currently valid tokens

2687

for token in followers:

2688

match = token.regexp.match(s)

2689

if match is not None:

2690

# Token found

2691

if token.value is not None:

2692

# Value found, parse digits

2693

factor = int(match.group(1), 10)

2694

# Add to value so far

2695

value += factor * token.value

2696

# Strip token from string

2697

s = token.regexp.sub("", s, 1)

2698

# Go to found token

2699

found_token = token

2700

# Set valid next tokens

2701

followers = found_token.followers

2702

break

2703

else:

2704

# No currently valid tokens were found

2705

raise ValueError("Invalid RFC 3339 duration: {!r}"

2706

.format(duration))

2707

# End token found

2708

return value

2709

2710

2711

1599

def string_to_delta(interval):

2712

1600

"""Parse a string and return a datetime.timedelta

2713

1601

2724

1612

>>> string_to_delta('5m 30s')

2725

1613

datetime.timedelta(0, 330)

2726

1614

"""

2727

2728

try:

2729

return rfc3339_duration_to_delta(interval)

2730

except ValueError:

2731

pass

2732

2733

1615

timevalue = datetime.timedelta(0)

2734

1616

for s in interval.split():

2735

1617

try:

2736

suffix = s[-1]

1618

suffix = unicode(s[-1])

2737

1619

value = int(s[:-1])

2738

1620

if suffix == "d":

2739

1621

delta = datetime.timedelta(value)

2746

1628

elif suffix == "w":

2747

1629

delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)

2748

1630

else:

2749

raise ValueError("Unknown suffix {!r}".format(suffix))

2750

except IndexError as e:

1631

raise ValueError("Unknown suffix %r" % suffix)

1632

except (ValueError, IndexError) as e:

2751

1633

raise ValueError(*(e.args))

2752

1634

timevalue += delta

2753

1635

return timevalue

2754

1636

2755

1637

1638

def if_nametoindex(interface):

1639

"""Call the C function if_nametoindex(), or equivalent

1640

1641

Note: This function cannot accept a unicode string."""

1642

global if_nametoindex

1643

try:

1644

if_nametoindex = (ctypes.cdll.LoadLibrary

1645

(ctypes.util.find_library("c"))

1646

.if_nametoindex)

1647

except (OSError, AttributeError):

1648

logger.warning("Doing if_nametoindex the hard way")

1649

def if_nametoindex(interface):

1650

"Get an interface index the hard way, i.e. using fcntl()"

1651

SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h

1652

with contextlib.closing(socket.socket()) as s:

1653

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1654

struct.pack(str("16s16x"),

1655

interface))

1656

interface_index = struct.unpack(str("I"),

1657

ifreq[16:20])[0]

1658

return interface_index

1659

return if_nametoindex(interface)

1660

1661

2756

1662

def daemon(nochdir = False, noclose = False):

2757

1663

"""See daemon(3). Standard BSD Unix function.

2758

1664

2766

1672

sys.exit()

2767

1673

if not noclose:

2768

1674

# Close all standard open file descriptors

2769

null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)

1675

null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)

2770

1676

if not stat.S_ISCHR(os.fstat(null).st_mode):

2771

1677

raise OSError(errno.ENODEV,

2772

"{} not a character device"

2773

.format(os.devnull))

1678

"%s not a character device"

1679

% os.path.devnull)

2774

1680

os.dup2(null, sys.stdin.fileno())

2775

1681

os.dup2(null, sys.stdout.fileno())

2776

1682

os.dup2(null, sys.stderr.fileno())

2785

1691

2786

1692

parser = argparse.ArgumentParser()

2787

1693

parser.add_argument("-v", "--version", action="version",

2788

version = "%(prog)s {}".format(version),

1694

version = "%%(prog)s %s" % version,

2789

1695

help="show version number and exit")

2790

1696

parser.add_argument("-i", "--interface", metavar="IF",

2791

1697

help="Bind to interface IF")

2797

1703

help="Run self-test")

2798

1704

parser.add_argument("--debug", action="store_true",

2799

1705

help="Debug mode; run in foreground and log"

2800

" to terminal", default=None)

1706

" to terminal")

2801

1707

parser.add_argument("--debuglevel", metavar="LEVEL",

2802

1708

help="Debug level for stdout output")

2803

1709

parser.add_argument("--priority", help="GnuTLS"

2810

1716

" files")

2811

1717

parser.add_argument("--no-dbus", action="store_false",

2812

1718

dest="use_dbus", help="Do not provide D-Bus"

2813

" system bus interface", default=None)

1719

" system bus interface")

2814

1720

parser.add_argument("--no-ipv6", action="store_false",

2815

dest="use_ipv6", help="Do not use IPv6",

2816

default=None)

2817

parser.add_argument("--no-restore", action="store_false",

2818

dest="restore", help="Do not restore stored"

2819

" state", default=None)

2820

parser.add_argument("--socket", type=int,

2821

help="Specify a file descriptor to a network"

2822

" socket to use instead of creating one")

2823

parser.add_argument("--statedir", metavar="DIR",

2824

help="Directory to save/restore state in")

2825

parser.add_argument("--foreground", action="store_true",

2826

help="Run in foreground", default=None)

2827

parser.add_argument("--no-zeroconf", action="store_false",

2828

dest="zeroconf", help="Do not use Zeroconf",

2829

default=None)

2830

1721

dest="use_ipv6", help="Do not use IPv6")

2831

1722

options = parser.parse_args()

2832

1723

2833

1724

if options.check:

2834

1725

import doctest

2835

fail_count, test_count = doctest.testmod()

2836

sys.exit(os.EX_OK if fail_count == 0 else 1)

1726

doctest.testmod()

1727

sys.exit()

2837

1728

2838

1729

# Default values for config file for server-global settings

2839

1730

server_defaults = { "interface": "",

2841

1732

"port": "",

2842

1733

"debug": "False",

2843

1734

"priority":

2844

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"

2845

":+SIGN-DSA-SHA256",

1735

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",

2846

1736

"servicename": "Mandos",

2847

1737

"use_dbus": "True",

2848

1738

"use_ipv6": "True",

2849

1739

"debuglevel": "",

2850

"restore": "True",

2851

"socket": "",

2852

"statedir": "/var/lib/mandos",

2853

"foreground": "False",

2854

"zeroconf": "True",

2855

}

1740

}

2856

1741

2857

1742

# Parse config file for server-global settings

2858

1743

server_config = configparser.SafeConfigParser(server_defaults)

2859

1744

del server_defaults

2860

server_config.read(os.path.join(options.configdir, "mandos.conf"))

1745

server_config.read(os.path.join(options.configdir,

1746

"mandos.conf"))

2861

1747

# Convert the SafeConfigParser object to a dict

2862

1748

server_settings = server_config.defaults()

2863

1749

# Use the appropriate methods on the non-string config options

2864

for option in ("debug", "use_dbus", "use_ipv6", "foreground"):

1750

for option in ("debug", "use_dbus", "use_ipv6"):

2865

1751

server_settings[option] = server_config.getboolean("DEFAULT",

2866

1752

option)

2867

1753

if server_settings["port"]:

2868

1754

server_settings["port"] = server_config.getint("DEFAULT",

2869

1755

"port")

2870

if server_settings["socket"]:

2871

server_settings["socket"] = server_config.getint("DEFAULT",

2872

"socket")

2873

# Later, stdin will, and stdout and stderr might, be dup'ed

2874

# over with an opened os.devnull. But we don't want this to

2875

# happen with a supplied network socket.

2876

if 0 <= server_settings["socket"] <= 2:

2877

server_settings["socket"] = os.dup(server_settings

2878

["socket"])

2879

1756

del server_config

2880

1757

2881

1758

# Override the settings from the config file with command line

2882

1759

# options, if set.

2883

1760

for option in ("interface", "address", "port", "debug",

2884

"priority", "servicename", "configdir", "use_dbus",

2885

"use_ipv6", "debuglevel", "restore", "statedir",

2886

"socket", "foreground", "zeroconf"):

1761

"priority", "servicename", "configdir",

1762

"use_dbus", "use_ipv6", "debuglevel"):

2887

1763

value = getattr(options, option)

2888

1764

if value is not None:

2889

1765

server_settings[option] = value

2890

1766

del options

2891

1767

# Force all strings to be unicode

2892

1768

for option in server_settings.keys():

2893

if isinstance(server_settings[option], bytes):

2894

server_settings[option] = (server_settings[option]

2895

.decode("utf-8"))

2896

# Force all boolean options to be boolean

2897

for option in ("debug", "use_dbus", "use_ipv6", "restore",

2898

"foreground", "zeroconf"):

2899

server_settings[option] = bool(server_settings[option])

2900

# Debug implies foreground

2901

if server_settings["debug"]:

2902

server_settings["foreground"] = True

1769

if type(server_settings[option]) is str:

1770

server_settings[option] = unicode(server_settings[option])

2903

1771

# Now we have our good server settings in "server_settings"

2904

1772

2905

1773

##################################################################

2906

1774

2907

if (not server_settings["zeroconf"]

2908

and not (server_settings["port"]

2909

or server_settings["socket"] != "")):

2910

parser.error("Needs port or socket to work without Zeroconf")

2911

2912

1775

# For convenience

2913

1776

debug = server_settings["debug"]

2914

1777

debuglevel = server_settings["debuglevel"]

2915

1778

use_dbus = server_settings["use_dbus"]

2916

1779

use_ipv6 = server_settings["use_ipv6"]

2917

stored_state_path = os.path.join(server_settings["statedir"],

2918

stored_state_file)

2919

foreground = server_settings["foreground"]

2920

zeroconf = server_settings["zeroconf"]

2921

2922

if debug:

2923

initlogger(debug, logging.DEBUG)

2924

else:

2925

if not debuglevel:

2926

initlogger(debug)

2927

else:

2928

level = getattr(logging, debuglevel.upper())

2929

initlogger(debug, level)

2930

1780

2931

1781

if server_settings["servicename"] != "Mandos":

2932

syslogger.setFormatter(

2933

logging.Formatter('Mandos ({}) [%(process)d]:'

2934

' %(levelname)s: %(message)s'.format(

2935

server_settings["servicename"])))

1782

syslogger.setFormatter(logging.Formatter

1783

('Mandos (%s) [%%(process)d]:'

1784

' %%(levelname)s: %%(message)s'

1785

% server_settings["servicename"]))

2936

1786

2937

1787

# Parse config file with clients

2938

client_config = configparser.SafeConfigParser(Client

2939

.client_defaults)

1788

client_defaults = { "timeout": "5m",

1789

"extended_timeout": "15m",

1790

"interval": "2m",

1791

"checker": "fping -q -- %%(host)s",

1792

"host": "",

1793

"approval_delay": "0s",

1794

"approval_duration": "1s",

1795

}

1796

client_config = configparser.SafeConfigParser(client_defaults)

2940

1797

client_config.read(os.path.join(server_settings["configdir"],

2941

1798

"clients.conf"))

2942

1799

2943

1800

global mandos_dbus_service

2944

1801

mandos_dbus_service = None

2945

1802

2946

socketfd = None

2947

if server_settings["socket"] != "":

2948

socketfd = server_settings["socket"]

2949

tcp_server = MandosServer(

2950

(server_settings["address"], server_settings["port"]),

2951

ClientHandler,

2952

interface=(server_settings["interface"] or None),

2953

use_ipv6=use_ipv6,

2954

gnutls_priority=server_settings["priority"],

2955

use_dbus=use_dbus,

2956

socketfd=socketfd)

2957

if not foreground:

2958

pidfilename = "/run/mandos.pid"

2959

if not os.path.isdir("/run/."):

2960

pidfilename = "/var/run/mandos.pid"

2961

pidfile = None

1803

tcp_server = MandosServer((server_settings["address"],

1804

server_settings["port"]),

1805

ClientHandler,

1806

interface=(server_settings["interface"]

1807

or None),

1808

use_ipv6=use_ipv6,

1809

gnutls_priority=

1810

server_settings["priority"],

1811

use_dbus=use_dbus)

1812

if not debug:

1813

pidfilename = "/var/run/mandos.pid"

2962

1814

try:

2963

pidfile = codecs.open(pidfilename, "w", encoding="utf-8")

2964

except IOError as e:

2965

logger.error("Could not open file %r", pidfilename,

2966

exc_info=e)

1815

pidfile = open(pidfilename, "w")

1816

except IOError:

1817

logger.error("Could not open file %r", pidfilename)

2967

1818

2968

for name, group in (("_mandos", "_mandos"),

2969

("mandos", "mandos"),

2970

("nobody", "nogroup")):

1819

try:

1820

uid = pwd.getpwnam("_mandos").pw_uid

1821

gid = pwd.getpwnam("_mandos").pw_gid

1822

except KeyError:

2971

1823

try:

2972

uid = pwd.getpwnam(name).pw_uid

2973

gid = pwd.getpwnam(group).pw_gid

2974

break

1824

uid = pwd.getpwnam("mandos").pw_uid

1825

gid = pwd.getpwnam("mandos").pw_gid

2975

1826

except KeyError:

2976

continue

2977

else:

2978

uid = 65534

2979

gid = 65534

1827

try:

1828

uid = pwd.getpwnam("nobody").pw_uid

1829

gid = pwd.getpwnam("nobody").pw_gid

1830

except KeyError:

1831

uid = 65534

1832

gid = 65534

2980

1833

try:

2981

1834

os.setgid(gid)

2982

1835

os.setuid(uid)

2983

if debug:

2984

logger.debug("Did setuid/setgid to {}:{}".format(uid,

2985

gid))

2986

1836

except OSError as error:

2987

logger.warning("Failed to setuid/setgid to {}:{}: {}"

2988

.format(uid, gid, os.strerror(error.errno)))

2989

if error.errno != errno.EPERM:

2990

raise

1837

if error[0] != errno.EPERM:

1838

raise error

1839

1840

if not debug and not debuglevel:

1841

syslogger.setLevel(logging.WARNING)

1842

console.setLevel(logging.WARNING)

1843

if debuglevel:

1844

level = getattr(logging, debuglevel.upper())

1845

syslogger.setLevel(level)

1846

console.setLevel(level)

2991

1847

2992

1848

if debug:

2993

1849

# Enable all possible GnuTLS debugging

2994

1850

2995

1851

# "Use a log level over 10 to enable all debugging options."

2996

1852

# - GnuTLS manual

2997

gnutls.global_set_log_level(11)

1853

gnutls.library.functions.gnutls_global_set_log_level(11)

2998

1854

2999

@gnutls.log_func

1855

@gnutls.library.types.gnutls_log_func

3000

1856

def debug_gnutls(level, string):

3001

1857

logger.debug("GnuTLS: %s", string[:-1])

3002

1858

3003

gnutls.global_set_log_function(debug_gnutls)

1859

(gnutls.library.functions

1860

.gnutls_global_set_log_function(debug_gnutls))

3004

1861

3005

1862

# Redirect stdin so all checkers get /dev/null

3006

null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)

1863

null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)

3007

1864

os.dup2(null, sys.stdin.fileno())

3008

1865

if null > 2:

3009

1866

os.close(null)

1867

else:

1868

# No console logging

1869

logger.removeHandler(console)

3010

1870

3011

1871

# Need to fork before connecting to D-Bus

3012

if not foreground:

1872

if not debug:

3013

1873

# Close all input and output, do double fork, etc.

3014

1874

daemon()

3015

1875

3016

# multiprocessing will use threads, so before we use GLib we need

3017

# to inform GLib that threads will be used.

3018

GLib.threads_init()

3019

3020

1876

global main_loop

3021

1877

# From the Avahi example code

3022

DBusGMainLoop(set_as_default=True)

3023

main_loop = GLib.MainLoop()

1878

DBusGMainLoop(set_as_default=True )

1879

main_loop = gobject.MainLoop()

3024

1880

bus = dbus.SystemBus()

3025

1881

# End of Avahi example code

3026

1882

if use_dbus:

3027

1883

try:

3028

bus_name = dbus.service.BusName("se.recompile.Mandos",

3029

bus,

3030

do_not_queue=True)

3031

old_bus_name = dbus.service.BusName(

3032

"se.bsnet.fukt.Mandos", bus,

3033

do_not_queue=True)

3034

except dbus.exceptions.DBusException as e:

3035

logger.error("Disabling D-Bus:", exc_info=e)

1884

bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",

1885

bus, do_not_queue=True)

1886

except dbus.exceptions.NameExistsException as e:

1887

logger.error(unicode(e) + ", disabling D-Bus")

3036

1888

use_dbus = False

3037

1889

server_settings["use_dbus"] = False

3038

1890

tcp_server.use_dbus = False

3039

if zeroconf:

3040

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3041

service = AvahiServiceToSyslog(

3042

name = server_settings["servicename"],

3043

servicetype = "_mandos._tcp",

3044

protocol = protocol,

3045

bus = bus)

3046

if server_settings["interface"]:

3047

service.interface = if_nametoindex(

3048

server_settings["interface"].encode("utf-8"))

1891

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1892

service = AvahiService(name = server_settings["servicename"],

1893

servicetype = "_mandos._tcp",

1894

protocol = protocol, bus = bus)

1895

if server_settings["interface"]:

1896

service.interface = (if_nametoindex

1897

(str(server_settings["interface"])))

3049

1898

3050

1899

global multiprocessing_manager

3051

1900

multiprocessing_manager = multiprocessing.Manager()

3053

1902

client_class = Client

3054

1903

if use_dbus:

3055

1904

client_class = functools.partial(ClientDBus, bus = bus)

3056

3057

client_settings = Client.config_parser(client_config)

3058

old_client_settings = {}

3059

clients_data = {}

3060

3061

# This is used to redirect stdout and stderr for checker processes

3062

global wnull

3063

wnull = open(os.devnull, "w") # A writable /dev/null

3064

# Only used if server is running in foreground but not in debug

3065

# mode

3066

if debug or not foreground:

3067

wnull.close()

3068

3069

# Get client data and settings from last running state.

3070

if server_settings["restore"]:

3071

try:

3072

with open(stored_state_path, "rb") as stored_state:

3073

if sys.version_info.major == 2:

3074

clients_data, old_client_settings = pickle.load(

3075

stored_state)

3076

else:

3077

bytes_clients_data, bytes_old_client_settings = (

3078

pickle.load(stored_state, encoding = "bytes"))

3079

### Fix bytes to strings

3080

## clients_data

3081

# .keys()

3082

clients_data = { (key.decode("utf-8")

3083

if isinstance(key, bytes)

3084

else key): value

3085

for key, value in

3086

bytes_clients_data.items() }

3087

del bytes_clients_data

3088

for key in clients_data:

3089

value = { (k.decode("utf-8")

3090

if isinstance(k, bytes) else k): v

3091

for k, v in

3092

clients_data[key].items() }

3093

clients_data[key] = value

3094

# .client_structure

3095

value["client_structure"] = [

3096

(s.decode("utf-8")

3097

if isinstance(s, bytes)

3098

else s) for s in

3099

value["client_structure"] ]

3100

# .name & .host

3101

for k in ("name", "host"):

3102

if isinstance(value[k], bytes):

3103

value[k] = value[k].decode("utf-8")

3104

## old_client_settings

3105

# .keys()

3106

old_client_settings = {

3107

(key.decode("utf-8")

3108

if isinstance(key, bytes)

3109

else key): value

3110

for key, value in

3111

bytes_old_client_settings.items() }

3112

del bytes_old_client_settings

3113

# .host

3114

for value in old_client_settings.values():

3115

if isinstance(value["host"], bytes):

3116

value["host"] = (value["host"]

3117

.decode("utf-8"))

3118

os.remove(stored_state_path)

3119

except IOError as e:

3120

if e.errno == errno.ENOENT:

3121

logger.warning("Could not load persistent state:"

3122

" {}".format(os.strerror(e.errno)))

3123

else:

3124

logger.critical("Could not load persistent state:",

3125

exc_info=e)

3126

raise

3127

except EOFError as e:

3128

logger.warning("Could not load persistent state: "

3129

"EOFError:",

3130

exc_info=e)

3131

3132

with PGPEngine() as pgp:

3133

for client_name, client in clients_data.items():

3134

# Skip removed clients

3135

if client_name not in client_settings:

3136

continue

3137

3138

# Decide which value to use after restoring saved state.

3139

# We have three different values: Old config file,

3140

# new config file, and saved state.

3141

# New config value takes precedence if it differs from old

3142

# config value, otherwise use saved state.

3143

for name, value in client_settings[client_name].items():

3144

try:

3145

# For each value in new config, check if it

3146

# differs from the old config value (Except for

3147

# the "secret" attribute)

3148

if (name != "secret"

3149

and (value !=

3150

old_client_settings[client_name][name])):

3151

client[name] = value

3152

except KeyError:

3153

pass

3154

3155

# Clients who has passed its expire date can still be

3156

# enabled if its last checker was successful. A Client

3157

# whose checker succeeded before we stored its state is

3158

# assumed to have successfully run all checkers during

3159

# downtime.

3160

if client["enabled"]:

3161

if datetime.datetime.utcnow() >= client["expires"]:

3162

if not client["last_checked_ok"]:

3163

logger.warning(

3164

"disabling client {} - Client never "

3165

"performed a successful checker".format(

3166

client_name))

3167

client["enabled"] = False

3168

elif client["last_checker_status"] != 0:

3169

logger.warning(

3170

"disabling client {} - Client last"

3171

" checker failed with error code"

3172

" {}".format(

3173

client_name,

3174

client["last_checker_status"]))

3175

client["enabled"] = False

3176

else:

3177

client["expires"] = (

3178

datetime.datetime.utcnow()

3179

+ client["timeout"])

3180

logger.debug("Last checker succeeded,"

3181

" keeping {} enabled".format(

3182

client_name))

1905

def client_config_items(config, section):

1906

special_settings = {

1907

"approved_by_default":

1908

lambda: config.getboolean(section,

1909

"approved_by_default"),

1910

}

1911

for name, value in config.items(section):

3183

1912

try:

3184

client["secret"] = pgp.decrypt(

3185

client["encrypted_secret"],

3186

client_settings[client_name]["secret"])

3187

except PGPError:

3188

# If decryption fails, we use secret from new settings

3189

logger.debug("Failed to decrypt {} old secret".format(

3190

client_name))

3191

client["secret"] = (client_settings[client_name]

3192

["secret"])

3193

3194

# Add/remove clients based on new changes made to config

3195

for client_name in (set(old_client_settings)

3196

- set(client_settings)):

3197

del clients_data[client_name]

3198

for client_name in (set(client_settings)

3199

- set(old_client_settings)):

3200

clients_data[client_name] = client_settings[client_name]

3201

3202

# Create all client objects

3203

for client_name, client in clients_data.items():

3204

tcp_server.clients[client_name] = client_class(

3205

name = client_name,

3206

settings = client,

3207

server_settings = server_settings)

3208

1913

yield (name, special_settings[name]())

1914

except KeyError:

1915

yield (name, value)

1916

1917

tcp_server.clients.update(set(

1918

client_class(name = section,

1919

config= dict(client_config_items(

1920

client_config, section)))

1921

for section in client_config.sections()))

3209

1922

if not tcp_server.clients:

3210

1923

logger.warning("No clients defined")

3211

3212

if not foreground:

3213

if pidfile is not None:

3214

pid = os.getpid()

3215

try:

3216

with pidfile:

3217

print(pid, file=pidfile)

3218

except IOError:

3219

logger.error("Could not write to file %r with PID %d",

3220

pidfilename, pid)

3221

del pidfile

1924

1925

if not debug:

1926

try:

1927

with pidfile:

1928

pid = os.getpid()

1929

pidfile.write(str(pid) + "\n".encode("utf-8"))

1930

del pidfile

1931

except IOError:

1932

logger.error("Could not write to file %r with PID %d",

1933

pidfilename, pid)

1934

except NameError:

1935

# "pidfile" was never created

1936

pass

3222

1937

del pidfilename

1938

1939

signal.signal(signal.SIGINT, signal.SIG_IGN)

3223

1940

3224

for termsig in (signal.SIGHUP, signal.SIGTERM):

3225

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3226

lambda: main_loop.quit() and False)

1941

signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())

1942

signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())

3227

1943

3228

1944

if use_dbus:

3229

3230

@alternate_dbus_interfaces(

3231

{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })

3232

class MandosDBusService(DBusObjectWithObjectManager):

1945

class MandosDBusService(dbus.service.Object):

3233

1946

"""A D-Bus proxy object"""

3234

3235

1947

def __init__(self):

3236

1948

dbus.service.Object.__init__(self, bus, "/")

3237

3238

_interface = "se.recompile.Mandos"

1949

_interface = "se.bsnet.fukt.Mandos"

3239

1950

3240

1951

@dbus.service.signal(_interface, signature="o")

3241

1952

def ClientAdded(self, objpath):

3247

1958

"D-Bus signal"

3248

1959

pass

3249

1960

3250

@dbus_annotations({"org.freedesktop.DBus.Deprecated":

3251

"true"})

3252

1961

@dbus.service.signal(_interface, signature="os")

3253

1962

def ClientRemoved(self, objpath, name):

3254

1963

"D-Bus signal"

3255

1964

pass

3256

1965

3257

@dbus_annotations({"org.freedesktop.DBus.Deprecated":

3258

"true"})

3259

1966

@dbus.service.method(_interface, out_signature="ao")

3260

1967

def GetAllClients(self):

3261

1968

"D-Bus method"

3262

return dbus.Array(c.dbus_object_path for c in

3263

tcp_server.clients.values())

1969

return dbus.Array(c.dbus_object_path

1970

for c in tcp_server.clients)

3264

1971

3265

@dbus_annotations({"org.freedesktop.DBus.Deprecated":

3266

"true"})

3267

1972

@dbus.service.method(_interface,

3268

1973

out_signature="a{oa{sv}}")

3269

1974

def GetAllClientsWithProperties(self):

3270

1975

"D-Bus method"

3271

1976

return dbus.Dictionary(

3272

{ c.dbus_object_path: c.GetAll(

3273

"se.recompile.Mandos.Client")

3274

for c in tcp_server.clients.values() },

1977

((c.dbus_object_path, c.GetAll(""))

1978

for c in tcp_server.clients),

3275

1979

signature="oa{sv}")

3276

1980

3277

1981

@dbus.service.method(_interface, in_signature="o")

3278

1982

def RemoveClient(self, object_path):

3279

1983

"D-Bus method"

3280

for c in tcp_server.clients.values():

1984

for c in tcp_server.clients:

3281

1985

if c.dbus_object_path == object_path:

3282

del tcp_server.clients[c.name]

1986

tcp_server.clients.remove(c)

3283

1987

c.remove_from_connection()

3284

# Don't signal the disabling

1988

# Don't signal anything except ClientRemoved

3285

1989

c.disable(quiet=True)

3286

# Emit D-Bus signal for removal

3287

self.client_removed_signal(c)

1990

# Emit D-Bus signal

1991

self.ClientRemoved(object_path, c.name)

3288

1992

return

3289

1993

raise KeyError(object_path)

3290

1994

3291

1995

del _interface

3292

3293

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3294

out_signature = "a{oa{sa{sv}}}")

3295

def GetManagedObjects(self):

3296

"""D-Bus method"""

3297

return dbus.Dictionary(

3298

{ client.dbus_object_path:

3299

dbus.Dictionary(

3300

{ interface: client.GetAll(interface)

3301

for interface in

3302

client._get_all_interface_names()})

3303

for client in tcp_server.clients.values()})

3304

3305

def client_added_signal(self, client):

3306

"""Send the new standard signal and the old signal"""

3307

if use_dbus:

3308

# New standard signal

3309

self.InterfacesAdded(

3310

client.dbus_object_path,

3311

dbus.Dictionary(

3312

{ interface: client.GetAll(interface)

3313

for interface in

3314

client._get_all_interface_names()}))

3315

# Old signal

3316

self.ClientAdded(client.dbus_object_path)

3317

3318

def client_removed_signal(self, client):

3319

"""Send the new standard signal and the old signal"""

3320

if use_dbus:

3321

# New standard signal

3322

self.InterfacesRemoved(

3323

client.dbus_object_path,

3324

client._get_all_interface_names())

3325

# Old signal

3326

self.ClientRemoved(client.dbus_object_path,

3327

client.name)

3328

1996

3329

1997

mandos_dbus_service = MandosDBusService()

3330

1998

3331

# Save modules to variables to exempt the modules from being

3332

# unloaded before the function registered with atexit() is run.

3333

mp = multiprocessing

3334

wn = wnull

3335

1999

def cleanup():

3336

2000

"Cleanup function; run on exit"

3337

if zeroconf:

3338

service.cleanup()

3339

3340

mp.active_children()

3341

wn.close()

3342

if not (tcp_server.clients or client_settings):

3343

return

3344

3345

# Store client before exiting. Secrets are encrypted with key

3346

# based on what config file has. If config file is

3347

# removed/edited, old secret will thus be unrecovable.

3348

clients = {}

3349

with PGPEngine() as pgp:

3350

for client in tcp_server.clients.values():

3351

key = client_settings[client.name]["secret"]

3352

client.encrypted_secret = pgp.encrypt(client.secret,

3353

key)

3354

client_dict = {}

3355

3356

# A list of attributes that can not be pickled

3357

# + secret.

3358

exclude = { "bus", "changedstate", "secret",

3359

"checker", "server_settings" }

3360

for name, typ in inspect.getmembers(dbus.service

3361

.Object):

3362

exclude.add(name)

3363

3364

client_dict["encrypted_secret"] = (client

3365

.encrypted_secret)

3366

for attr in client.client_structure:

3367

if attr not in exclude:

3368

client_dict[attr] = getattr(client, attr)

3369

3370

clients[client.name] = client_dict

3371

del client_settings[client.name]["secret"]

3372

3373

try:

3374

with tempfile.NamedTemporaryFile(

3375

mode='wb',

3376

suffix=".pickle",

3377

prefix='clients-',

3378

dir=os.path.dirname(stored_state_path),

3379

delete=False) as stored_state:

3380

pickle.dump((clients, client_settings), stored_state,

3381

protocol = 2)

3382

tempname = stored_state.name

3383

os.rename(tempname, stored_state_path)

3384

except (IOError, OSError) as e:

3385

if not debug:

3386

try:

3387

os.remove(tempname)

3388

except NameError:

3389

pass

3390

if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):

3391

logger.warning("Could not save persistent state: {}"

3392

.format(os.strerror(e.errno)))

3393

else:

3394

logger.warning("Could not save persistent state:",

3395

exc_info=e)

3396

raise

3397

3398

# Delete all clients, and settings from config

2001

service.cleanup()

2002

3399

2003

while tcp_server.clients:

3400

name, client = tcp_server.clients.popitem()

2004

client = tcp_server.clients.pop()

3401

2005

if use_dbus:

3402

2006

client.remove_from_connection()

3403

# Don't signal the disabling

2007

client.disable_hook = None

2008

# Don't signal anything except ClientRemoved

3404

2009

client.disable(quiet=True)

3405

# Emit D-Bus signal for removal

3406

2010

if use_dbus:

3407

mandos_dbus_service.client_removed_signal(client)

3408

client_settings.clear()

2011

# Emit D-Bus signal

2012

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2013

client.name)

3409

2014

3410

2015

atexit.register(cleanup)

3411

2016

3412

for client in tcp_server.clients.values():

2017

for client in tcp_server.clients:

3413

2018

if use_dbus:

3414

# Emit D-Bus signal for adding

3415

mandos_dbus_service.client_added_signal(client)

3416

# Need to initiate checking of clients

3417

if client.enabled:

3418

client.init_checker()

2019

# Emit D-Bus signal

2020

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2021

client.enable()

3419

2022

3420

2023

tcp_server.enable()

3421

2024

tcp_server.server_activate()

3422

2025

3423

2026

# Find out what port we got

3424

if zeroconf:

3425

service.port = tcp_server.socket.getsockname()[1]

2027

service.port = tcp_server.socket.getsockname()[1]

3426

2028

if use_ipv6:

3427

2029

logger.info("Now listening on address %r, port %d,"

3428

" flowinfo %d, scope_id %d",

3429

*tcp_server.socket.getsockname())

2030

" flowinfo %d, scope_id %d"

2031

% tcp_server.socket.getsockname())

3430

2032

else: # IPv4

3431

logger.info("Now listening on address %r, port %d",

3432

*tcp_server.socket.getsockname())

2033

logger.info("Now listening on address %r, port %d"

2034

% tcp_server.socket.getsockname())

3433

2035

3434

2036

#service.interface = tcp_server.socket.getsockname()[3]

3435

2037

3436

2038

try:

3437

if zeroconf:

3438

# From the Avahi example code

3439

try:

3440

service.activate()

3441

except dbus.exceptions.DBusException as error:

3442

logger.critical("D-Bus Exception", exc_info=error)

3443

cleanup()

3444

sys.exit(1)

3445

# End of Avahi example code

2039

# From the Avahi example code

2040

try:

2041

service.activate()

2042

except dbus.exceptions.DBusException as error:

2043

logger.critical("DBusException: %s", error)

2044

cleanup()

2045

sys.exit(1)

2046

# End of Avahi example code

3446

2047

3447

GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,

3448

lambda *args, **kwargs:

3449

(tcp_server.handle_request

3450

(*args[2:], **kwargs) or True))

2048

gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,

2049

lambda *args, **kwargs:

2050

(tcp_server.handle_request

2051

(*args[2:], **kwargs) or True))

3451

2052

3452

2053

logger.debug("Starting main loop")

3453

2054

main_loop.run()

3454

2055

except AvahiError as error:

3455

logger.critical("Avahi Error", exc_info=error)

2056

logger.critical("AvahiError: %s", error)

3456

2057

cleanup()

3457

2058

sys.exit(1)

3458

2059

except KeyboardInterrupt: