/mandos/release : revision 237.7.34

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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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except ImportError:

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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 = "1.7.7"

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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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'--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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version = "1.3.0"

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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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class AvahiError(Exception):

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

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self.value = value

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

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**kwargs)

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

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def __unicode__(self):

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return unicode(repr(self.value))

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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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):

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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):

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self.interface = interface

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self.name = name

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self.type = servicetype

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self, remove=True):

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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

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

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self.name)

355

if remove:

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self.remove()

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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if (error.get_dbus_name()

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

362

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

363

return self.rename(remove=False)

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else:

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

366

self.cleanup()

367

os._exit(1)

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

174

self.cleanup()

175

os._exit(1)

176

self.rename_count += 1

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def remove(self):

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

371

179

if self.entry_group_state_changed_match is not None:

373

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self.entry_group_state_changed_match = None

374

182

if self.group is not None:

375

183

self.group.Reset()

376

377

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def add(self):

378

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

379

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self.remove()

384

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

385

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self.entry_group_state_changed))

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'StateChanged', self .entry_group_state_changed))

388

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

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self.name, self.type)

390

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self.group.AddService(

396

203

dbus.UInt16(self.port),

397

204

avahi.string_array_to_txt_array(self.TXT))

398

205

self.group.Commit()

399

400

206

def entry_group_state_changed(self, state, error):

401

207

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

402

208

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

408

214

self.rename()

409

215

elif state == avahi.ENTRY_GROUP_FAILURE:

410

216

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

411

str(error))

412

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

413

217

unicode(error))

218

raise AvahiGroupError("State changed: %s"

219

% unicode(error))

414

220

def cleanup(self):

415

221

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

416

222

if self.group is not None:

417

223

try:

418

224

self.group.Free()

419

225

except (dbus.exceptions.UnknownMethodException,

420

dbus.exceptions.DBusException):

226

dbus.exceptions.DBusException) as e:

421

227

pass

422

228

self.group = None

423

229

self.remove()

424

425

230

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

426

231

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

427

232

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

428

bad_states = {

429

avahi.SERVER_INVALID: "Zeroconf server invalid",

430

avahi.SERVER_REGISTERING: None,

431

avahi.SERVER_COLLISION: "Zeroconf server name collision",

432

avahi.SERVER_FAILURE: "Zeroconf server failure",

433

}

233

bad_states = { avahi.SERVER_INVALID:

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"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" }

434

240

if state in bad_states:

435

241

if bad_states[state] is not None:

436

242

if error is None:

439

245

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

440

246

self.cleanup()

441

247

elif state == avahi.SERVER_RUNNING:

442

try:

443

self.add()

444

except dbus.exceptions.DBusException as error:

445

if (error.get_dbus_name()

446

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

447

logger.info("Local Zeroconf service name"

448

" collision.")

449

return self.rename(remove=False)

450

else:

451

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

452

self.cleanup()

453

os._exit(1)

248

self.add()

454

249

else:

455

250

if error is None:

456

251

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

457

252

else:

458

253

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

459

460

254

def activate(self):

461

255

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

462

256

if self.server is None:

466

260

follow_name_owner_changes=True),

467

261

avahi.DBUS_INTERFACE_SERVER)

468

262

self.server.connect_to_signal("StateChanged",

469

self.server_state_changed)

263

self.server_state_changed)

470

264

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

471

265

472

266

473

class AvahiServiceToSyslog(AvahiService):

474

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

475

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

476

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

477

syslogger.setFormatter(logging.Formatter(

478

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

479

.format(self.name)))

480

return ret

481

482

# Pretend that we have a GnuTLS module

483

class GnuTLS(object):

484

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

485

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

486

487

_library = ctypes.cdll.LoadLibrary(

488

ctypes.util.find_library("gnutls"))

489

_need_version = b"3.3.0"

490

def __init__(self):

491

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

492

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

493

# happens.

494

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

495

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

496

.format(self._need_version))

497

498

# Unless otherwise indicated, the constants and types below are

499

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

500

501

# Constants

502

E_SUCCESS = 0

503

E_INTERRUPTED = -52

504

E_AGAIN = -28

505

CRT_OPENPGP = 2

506

CLIENT = 2

507

SHUT_RDWR = 0

508

CRD_CERTIFICATE = 1

509

E_NO_CERTIFICATE_FOUND = -49

510

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

511

512

# Types

513

class session_int(ctypes.Structure):

514

_fields_ = []

515

session_t = ctypes.POINTER(session_int)

516

class certificate_credentials_st(ctypes.Structure):

517

_fields_ = []

518

certificate_credentials_t = ctypes.POINTER(

519

certificate_credentials_st)

520

certificate_type_t = ctypes.c_int

521

class datum_t(ctypes.Structure):

522

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

523

('size', ctypes.c_uint)]

524

class openpgp_crt_int(ctypes.Structure):

525

_fields_ = []

526

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

527

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

528

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

529

credentials_type_t = ctypes.c_int

530

transport_ptr_t = ctypes.c_void_p

531

close_request_t = ctypes.c_int

532

533

# Exceptions

534

class Error(Exception):

535

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

536

# exception might be raised from within GnuTLS.__init__,

537

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

538

# global variable has happened.

539

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

540

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

541

# code is passed, convert it to a string with

542

# gnutls.strerror()

543

self.code = code

544

if message is None and code is not None:

545

message = GnuTLS.strerror(code)

546

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

547

message, *args)

548

549

class CertificateSecurityError(Error):

550

pass

551

552

# Classes

553

class Credentials(object):

554

def __init__(self):

555

self._c_object = gnutls.certificate_credentials_t()

556

gnutls.certificate_allocate_credentials(

557

ctypes.byref(self._c_object))

558

self.type = gnutls.CRD_CERTIFICATE

559

560

def __del__(self):

561

gnutls.certificate_free_credentials(self._c_object)

562

563

class ClientSession(object):

564

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

565

self._c_object = gnutls.session_t()

566

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

567

gnutls.set_default_priority(self._c_object)

568

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

569

gnutls.handshake_set_private_extensions(self._c_object,

570

True)

571

self.socket = socket

572

if credentials is None:

573

credentials = gnutls.Credentials()

574

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

575

ctypes.cast(credentials._c_object,

576

ctypes.c_void_p))

577

self.credentials = credentials

578

579

def __del__(self):

580

gnutls.deinit(self._c_object)

581

582

def handshake(self):

583

return gnutls.handshake(self._c_object)

584

585

def send(self, data):

586

data = bytes(data)

587

data_len = len(data)

588

while data_len > 0:

589

data_len -= gnutls.record_send(self._c_object,

590

data[-data_len:],

591

data_len)

592

593

def bye(self):

594

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

595

596

# Error handling functions

597

def _error_code(result):

598

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

599

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

600

if result >= 0:

601

return result

602

if result == gnutls.E_NO_CERTIFICATE_FOUND:

603

raise gnutls.CertificateSecurityError(code = result)

604

raise gnutls.Error(code = result)

605

606

def _retry_on_error(result, func, arguments):

607

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

608

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

609

while result < 0:

610

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

611

return _error_code(result)

612

result = func(*arguments)

613

return result

614

615

# Unless otherwise indicated, the function declarations below are

616

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

617

618

# Functions

619

priority_set_direct = _library.gnutls_priority_set_direct

620

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

621

ctypes.POINTER(ctypes.c_char_p)]

622

priority_set_direct.restype = _error_code

623

624

init = _library.gnutls_init

625

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

626

init.restype = _error_code

627

628

set_default_priority = _library.gnutls_set_default_priority

629

set_default_priority.argtypes = [session_t]

630

set_default_priority.restype = _error_code

631

632

record_send = _library.gnutls_record_send

633

record_send.argtypes = [session_t, ctypes.c_void_p,

634

ctypes.c_size_t]

635

record_send.restype = ctypes.c_ssize_t

636

record_send.errcheck = _retry_on_error

637

638

certificate_allocate_credentials = (

639

_library.gnutls_certificate_allocate_credentials)

640

certificate_allocate_credentials.argtypes = [

641

ctypes.POINTER(certificate_credentials_t)]

642

certificate_allocate_credentials.restype = _error_code

643

644

certificate_free_credentials = (

645

_library.gnutls_certificate_free_credentials)

646

certificate_free_credentials.argtypes = [certificate_credentials_t]

647

certificate_free_credentials.restype = None

648

649

handshake_set_private_extensions = (

650

_library.gnutls_handshake_set_private_extensions)

651

handshake_set_private_extensions.argtypes = [session_t,

652

ctypes.c_int]

653

handshake_set_private_extensions.restype = None

654

655

credentials_set = _library.gnutls_credentials_set

656

credentials_set.argtypes = [session_t, credentials_type_t,

657

ctypes.c_void_p]

658

credentials_set.restype = _error_code

659

660

strerror = _library.gnutls_strerror

661

strerror.argtypes = [ctypes.c_int]

662

strerror.restype = ctypes.c_char_p

663

664

certificate_type_get = _library.gnutls_certificate_type_get

665

certificate_type_get.argtypes = [session_t]

666

certificate_type_get.restype = _error_code

667

668

certificate_get_peers = _library.gnutls_certificate_get_peers

669

certificate_get_peers.argtypes = [session_t,

670

ctypes.POINTER(ctypes.c_uint)]

671

certificate_get_peers.restype = ctypes.POINTER(datum_t)

672

673

global_set_log_level = _library.gnutls_global_set_log_level

674

global_set_log_level.argtypes = [ctypes.c_int]

675

global_set_log_level.restype = None

676

677

global_set_log_function = _library.gnutls_global_set_log_function

678

global_set_log_function.argtypes = [log_func]

679

global_set_log_function.restype = None

680

681

deinit = _library.gnutls_deinit

682

deinit.argtypes = [session_t]

683

deinit.restype = None

684

685

handshake = _library.gnutls_handshake

686

handshake.argtypes = [session_t]

687

handshake.restype = _error_code

688

handshake.errcheck = _retry_on_error

689

690

transport_set_ptr = _library.gnutls_transport_set_ptr

691

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

692

transport_set_ptr.restype = None

693

694

bye = _library.gnutls_bye

695

bye.argtypes = [session_t, close_request_t]

696

bye.restype = _error_code

697

bye.errcheck = _retry_on_error

698

699

check_version = _library.gnutls_check_version

700

check_version.argtypes = [ctypes.c_char_p]

701

check_version.restype = ctypes.c_char_p

702

703

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

704

705

openpgp_crt_init = _library.gnutls_openpgp_crt_init

706

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

707

openpgp_crt_init.restype = _error_code

708

709

openpgp_crt_import = _library.gnutls_openpgp_crt_import

710

openpgp_crt_import.argtypes = [openpgp_crt_t,

711

ctypes.POINTER(datum_t),

712

openpgp_crt_fmt_t]

713

openpgp_crt_import.restype = _error_code

714

715

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

716

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

717

ctypes.POINTER(ctypes.c_uint)]

718

openpgp_crt_verify_self.restype = _error_code

719

720

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

721

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

722

openpgp_crt_deinit.restype = None

723

724

openpgp_crt_get_fingerprint = (

725

_library.gnutls_openpgp_crt_get_fingerprint)

726

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

727

ctypes.c_void_p,

728

ctypes.POINTER(

729

ctypes.c_size_t)]

730

openpgp_crt_get_fingerprint.restype = _error_code

731

732

# Remove non-public functions

733

del _error_code, _retry_on_error

734

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

735

gnutls = GnuTLS()

736

737

def call_pipe(connection, # : multiprocessing.Connection

738

func, *args, **kwargs):

739

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

740

741

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

742

return value on the provided multiprocessing.Connection.

743

"""

744

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

745

connection.close()

746

747

267

class Client(object):

748

268

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

749

269

750

270

Attributes:

751

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

271

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

752

272

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

753

273

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

754

274

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

755

275

to see if the client lives.

756

276

'None' if no process is running.

757

checker_callback_tag: a GLib event source tag, or None

277

checker_callback_tag: a gobject event source tag, or None

758

278

checker_command: string; External command which is run to check

759

279

if client lives. %() expansions are done at

760

280

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

761

281

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

762

checker_initiator_tag: a GLib event source tag, or None

282

checker_initiator_tag: a gobject event source tag, or None

763

283

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

764

client_structure: Object describing what attributes a client has

765

and is used for storing the client at exit

766

284

current_checker_command: string; current running checker_command

767

disable_initiator_tag: a GLib event source tag, or None

285

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

286

disable_initiator_tag: a gobject event source tag, or None

768

287

enabled: bool()

769

288

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

770

289

uniquely identify the client

772

291

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

773

292

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

774

293

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

775

last_checker_status: integer between 0 and 255 reflecting exit

776

status of last checker. -1 reflects crashed

777

checker, -2 means no checker completed yet.

778

last_checker_signal: The signal which killed the last checker, if

779

last_checker_status is -1

780

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

294

last_enabled: datetime.datetime(); (UTC)

781

295

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

782

296

D-Bus identifiers

783

297

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

784

298

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

785

299

until this client is disabled

786

extended_timeout: extra long timeout when secret has been sent

787

300

runtime_expansions: Allowed attributes for runtime expansion.

788

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

789

disabled, or None

790

server_settings: The server_settings dict from main()

791

301

"""

792

302

793

303

runtime_expansions = ("approval_delay", "approval_duration",

794

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

795

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

796

"last_approval_request", "last_checked_ok",

304

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

305

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

797

306

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

798

client_defaults = {

799

"timeout": "PT5M",

800

"extended_timeout": "PT15M",

801

"interval": "PT2M",

802

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

803

"host": "",

804

"approval_delay": "PT0S",

805

"approval_duration": "PT1S",

806

"approved_by_default": "True",

807

"enabled": "True",

808

}

809

307

810

308

@staticmethod

811

def config_parser(config):

812

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

813

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

814

with exceptions for any special settings as defined above.

815

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

816

value given the same arguments.

817

"""

818

settings = {}

819

for client_name in config.sections():

820

section = dict(config.items(client_name))

821

client = settings[client_name] = {}

822

823

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

824

# Reformat values from string types to Python types

825

client["approved_by_default"] = config.getboolean(

826

client_name, "approved_by_default")

827

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

828

"enabled")

829

830

# Uppercase and remove spaces from fingerprint for later

831

# comparison purposes with return value from the

832

# fingerprint() function

833

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

834

.replace(" ", ""))

835

if "secret" in section:

836

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

837

.encode("utf-8"),

838

"base64")

839

elif "secfile" in section:

840

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

841

(section["secfile"])),

842

"rb") as secfile:

843

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

844

else:

845

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

846

.format(section))

847

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

848

client["extended_timeout"] = string_to_delta(

849

section["extended_timeout"])

850

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

851

client["approval_delay"] = string_to_delta(

852

section["approval_delay"])

853

client["approval_duration"] = string_to_delta(

854

section["approval_duration"])

855

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

856

client["last_approval_request"] = None

857

client["last_checked_ok"] = None

858

client["last_checker_status"] = -2

859

860

return settings

861

862

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

309

def _timedelta_to_milliseconds(td):

310

"Convert a datetime.timedelta() to milliseconds"

311

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

312

+ (td.seconds * 1000)

313

+ (td.microseconds // 1000))

314

315

def timeout_milliseconds(self):

316

"Return the 'timeout' attribute in milliseconds"

317

return self._timedelta_to_milliseconds(self.timeout)

318

319

def interval_milliseconds(self):

320

"Return the 'interval' attribute in milliseconds"

321

return self._timedelta_to_milliseconds(self.interval)

322

323

def approval_delay_milliseconds(self):

324

return self._timedelta_to_milliseconds(self.approval_delay)

325

326

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

327

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

328

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

329

attribute."""

863

330

self.name = name

864

if server_settings is None:

865

server_settings = {}

866

self.server_settings = server_settings

867

# adding all client settings

868

for setting, value in settings.items():

869

setattr(self, setting, value)

870

871

if self.enabled:

872

if not hasattr(self, "last_enabled"):

873

self.last_enabled = datetime.datetime.utcnow()

874

if not hasattr(self, "expires"):

875

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

876

+ self.timeout)

877

else:

878

self.last_enabled = None

879

self.expires = None

880

331

if config is None:

332

config = {}

881

333

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

334

# Uppercase and remove spaces from fingerprint for later

335

# comparison purposes with return value from the fingerprint()

336

# function

337

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

338

.replace(" ", ""))

882

339

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

883

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

884

datetime.datetime.utcnow())

885

886

# attributes specific for this server instance

340

if "secret" in config:

341

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

342

elif "secfile" in config:

343

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

344

(config["secfile"])),

345

"rb") as secfile:

346

self.secret = secfile.read()

347

else:

348

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

349

% self.name)

350

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

351

self.created = datetime.datetime.utcnow()

352

self.enabled = False

353

self.last_approval_request = None

354

self.last_enabled = None

355

self.last_checked_ok = None

356

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

357

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

358

self.disable_hook = disable_hook

887

359

self.checker = None

888

360

self.checker_initiator_tag = None

889

361

self.disable_initiator_tag = None

890

362

self.checker_callback_tag = None

363

self.checker_command = config["checker"]

891

364

self.current_checker_command = None

892

self.approved = None

365

self.last_connect = None

366

self._approved = None

367

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

368

True)

893

369

self.approvals_pending = 0

894

self.changedstate = multiprocessing_manager.Condition(

895

multiprocessing_manager.Lock())

896

self.client_structure = [attr

897

for attr in self.__dict__.keys()

898

if not attr.startswith("_")]

899

self.client_structure.append("client_structure")

900

901

for name, t in inspect.getmembers(

902

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

903

if not name.startswith("_"):

904

self.client_structure.append(name)

370

self.approval_delay = string_to_delta(

371

config["approval_delay"])

372

self.approval_duration = string_to_delta(

373

config["approval_duration"])

374

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

905

375

906

# Send notice to process children that client state has changed

907

376

def send_changedstate(self):

908

with self.changedstate:

909

self.changedstate.notify_all()

910

377

self.changedstate.acquire()

378

self.changedstate.notify_all()

379

self.changedstate.release()

380

911

381

def enable(self):

912

382

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

913

383

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

914

384

# Already enabled

915

385

return

916

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

917

self.enabled = True

386

self.send_changedstate()

918

387

self.last_enabled = datetime.datetime.utcnow()

919

self.init_checker()

920

self.send_changedstate()

388

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

389

# and every interval from then on.

390

self.checker_initiator_tag = (gobject.timeout_add

391

(self.interval_milliseconds(),

392

self.start_checker))

393

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

394

self.disable_initiator_tag = (gobject.timeout_add

395

(self.timeout_milliseconds(),

396

self.disable))

397

self.enabled = True

398

# Also start a new checker *right now*.

399

self.start_checker()

921

400

922

401

def disable(self, quiet=True):

923

402

"""Disable this client."""

924

403

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

925

404

return False

926

405

if not quiet:

406

self.send_changedstate()

407

if not quiet:

927

408

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

928

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

929

GLib.source_remove(self.disable_initiator_tag)

409

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

410

gobject.source_remove(self.disable_initiator_tag)

930

411

self.disable_initiator_tag = None

931

self.expires = None

932

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

933

GLib.source_remove(self.checker_initiator_tag)

412

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

413

gobject.source_remove(self.checker_initiator_tag)

934

414

self.checker_initiator_tag = None

935

415

self.stop_checker()

416

if self.disable_hook:

417

self.disable_hook(self)

936

418

self.enabled = False

937

if not quiet:

938

self.send_changedstate()

939

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

419

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

940

420

return False

941

421

942

422

def __del__(self):

423

self.disable_hook = None

943

424

self.disable()

944

425

945

def init_checker(self):

946

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

947

# and every interval from then on.

948

if self.checker_initiator_tag is not None:

949

GLib.source_remove(self.checker_initiator_tag)

950

self.checker_initiator_tag = GLib.timeout_add(

951

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

952

self.start_checker)

953

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

954

if self.disable_initiator_tag is not None:

955

GLib.source_remove(self.disable_initiator_tag)

956

self.disable_initiator_tag = GLib.timeout_add(

957

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

958

# Also start a new checker *right now*.

959

self.start_checker()

960

961

def checker_callback(self, source, condition, connection,

962

command):

426

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

963

427

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

964

428

self.checker_callback_tag = None

965

429

self.checker = None

966

# Read return code from connection (see call_pipe)

967

returncode = connection.recv()

968

connection.close()

969

970

if returncode >= 0:

971

self.last_checker_status = returncode

972

self.last_checker_signal = None

973

if self.last_checker_status == 0:

430

if os.WIFEXITED(condition):

431

exitstatus = os.WEXITSTATUS(condition)

432

if exitstatus == 0:

974

433

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

975

434

vars(self))

976

435

self.checked_ok()

977

436

else:

978

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

437

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

438

vars(self))

979

439

else:

980

self.last_checker_status = -1

981

self.last_checker_signal = -returncode

982

440

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

983

441

vars(self))

984

return False

985

442

986

443

def checked_ok(self):

987

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

444

"""Bump up the timeout for this client.

445

446

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

447

alive and well.

448

"""

988

449

self.last_checked_ok = datetime.datetime.utcnow()

989

self.last_checker_status = 0

990

self.last_checker_signal = None

991

self.bump_timeout()

992

993

def bump_timeout(self, timeout=None):

994

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

995

if timeout is None:

996

timeout = self.timeout

997

if self.disable_initiator_tag is not None:

998

GLib.source_remove(self.disable_initiator_tag)

999

self.disable_initiator_tag = None

1000

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

1001

self.disable_initiator_tag = GLib.timeout_add(

1002

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

1003

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

450

gobject.source_remove(self.disable_initiator_tag)

451

self.disable_initiator_tag = (gobject.timeout_add

452

(self.timeout_milliseconds(),

453

self.disable))

1004

454

1005

455

def need_approval(self):

1006

456

self.last_approval_request = datetime.datetime.utcnow()

1011

461

If a checker already exists, leave it running and do

1012

462

nothing."""

1013

463

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

1014

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

1015

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

1016

# would inevitably timeout, since no checker would get a

1017

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

464

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

465

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

466

# client would inevitably timeout, since no checker would get

467

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

1018

468

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

1019

469

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

1020

470

# should be.

1021

471

1022

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

1023

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

1024

self.checker.join()

1025

self.checker = None

472

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

473

try:

474

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

475

except (AttributeError, OSError) as error:

476

if (isinstance(error, OSError)

477

and error.errno != errno.ECHILD):

478

raise error

479

else:

480

if pid:

481

logger.warning("Checker was a zombie")

482

gobject.source_remove(self.checker_callback_tag)

483

self.checker_callback(pid, status,

484

self.current_checker_command)

1026

485

# Start a new checker if needed

1027

486

if self.checker is None:

1028

# Escape attributes for the shell

1029

escaped_attrs = {

1030

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

1031

for attr in self.runtime_expansions }

1032

487

try:

1033

command = self.checker_command % escaped_attrs

1034

except TypeError as error:

1035

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

1036

self.checker_command,

1037

exc_info=error)

1038

return True # Try again later

488

# In case checker_command has exactly one % operator

489

command = self.checker_command % self.host

490

except TypeError:

491

# Escape attributes for the shell

492

escaped_attrs = dict(

493

(attr,

494

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

495

errors=

496

'replace')))

497

for attr in

498

self.runtime_expansions)

499

500

try:

501

command = self.checker_command % escaped_attrs

502

except TypeError as error:

503

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

504

' %s', self.checker_command, error)

505

return True # Try again later

1039

506

self.current_checker_command = command

1040

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

1041

self.name)

1042

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

1043

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

1044

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

1045

# always replaced by /dev/null.)

1046

# The exception is when not debugging but nevertheless

1047

# running in the foreground; use the previously

1048

# created wnull.

1049

popen_args = { "close_fds": True,

1050

"shell": True,

1051

"cwd": "/" }

1052

if (not self.server_settings["debug"]

1053

and self.server_settings["foreground"]):

1054

popen_args.update({"stdout": wnull,

1055

"stderr": wnull })

1056

pipe = multiprocessing.Pipe(duplex = False)

1057

self.checker = multiprocessing.Process(

1058

target = call_pipe,

1059

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

1060

kwargs = popen_args)

1061

self.checker.start()

1062

self.checker_callback_tag = GLib.io_add_watch(

1063

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

1064

self.checker_callback, pipe[0], command)

1065

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

507

try:

508

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

509

command, self.name)

510

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

511

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

512

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

513

# always replaced by /dev/null.)

514

self.checker = subprocess.Popen(command,

515

close_fds=True,

516

shell=True, cwd="/")

517

self.checker_callback_tag = (gobject.child_watch_add

518

(self.checker.pid,

519

self.checker_callback,

520

data=command))

521

# The checker may have completed before the gobject

522

# watch was added. Check for this.

523

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

524

if pid:

525

gobject.source_remove(self.checker_callback_tag)

526

self.checker_callback(pid, status, command)

527

except OSError as error:

528

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

529

error)

530

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

1066

531

return True

1067

532

1068

533

def stop_checker(self):

1069

534

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

1070

535

if self.checker_callback_tag:

1071

GLib.source_remove(self.checker_callback_tag)

536

gobject.source_remove(self.checker_callback_tag)

1072

537

self.checker_callback_tag = None

1073

538

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

1074

539

return

1075

540

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

1076

self.checker.terminate()

541

try:

542

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

543

#time.sleep(0.5)

544

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

545

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

546

except OSError as error:

547

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

548

raise

1077

549

self.checker = None

1078

550

1079

1080

def dbus_service_property(dbus_interface,

1081

signature="v",

1082

access="readwrite",

1083

byte_arrays=False):

551

def dbus_service_property(dbus_interface, signature="v",

552

access="readwrite", byte_arrays=False):

1084

553

"""Decorators for marking methods of a DBusObjectWithProperties to

1085

554

become properties on the D-Bus.

1086

555

1095

564

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

1096

565

if byte_arrays and signature != "ay":

1097

566

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

1098

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

1099

567

" signature %r" % signature)

1100

568

def decorator(func):

1101

569

func._dbus_is_property = True

1102

570

func._dbus_interface = dbus_interface

1107

575

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

1108

576

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1109

577

return func

1110

1111

return decorator

1112

1113

1114

def dbus_interface_annotations(dbus_interface):

1115

"""Decorator for marking functions returning interface annotations

1116

1117

Usage:

1118

1119

@dbus_interface_annotations("org.example.Interface")

1120

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

1121

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

1122

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

1123

"false"}

1124

"""

1125

1126

def decorator(func):

1127

func._dbus_is_interface = True

1128

func._dbus_interface = dbus_interface

1129

func._dbus_name = dbus_interface

1130

return func

1131

1132

return decorator

1133

1134

1135

def dbus_annotations(annotations):

1136

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

1137

Usage:

1138

1139

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

1140

"org.freedesktop.DBus.Property."

1141

"EmitsChangedSignal": "false"})

1142

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

1143

access="r")

1144

def Property_dbus_property(self):

1145

return dbus.Boolean(False)

1146

1147

See also the DBusObjectWithAnnotations class.

1148

"""

1149

1150

def decorator(func):

1151

func._dbus_annotations = annotations

1152

return func

1153

1154

578

return decorator

1155

579

1156

580

1157

581

class DBusPropertyException(dbus.exceptions.DBusException):

1158

582

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

1159

583

"""

1160

pass

584

def __unicode__(self):

585

return unicode(str(self))

1161

586

1162

587

1163

588

class DBusPropertyAccessException(DBusPropertyException):

1172

597

pass

1173

598

1174

599

1175

class DBusObjectWithAnnotations(dbus.service.Object):

1176

"""A D-Bus object with annotations.

1177

1178

Classes inheriting from this can use the dbus_annotations

1179

decorator to add annotations to methods or signals.

1180

"""

1181

1182

@staticmethod

1183

def _is_dbus_thing(thing):

1184

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

1185

1186

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

1187

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

1188

"""

1189

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

1190

False)

1191

1192

def _get_all_dbus_things(self, thing):

1193

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

1194

"""

1195

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

1196

athing.__get__(self))

1197

for cls in self.__class__.__mro__

1198

for name, athing in

1199

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

1200

1201

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1202

out_signature = "s",

1203

path_keyword = 'object_path',

1204

connection_keyword = 'connection')

1205

def Introspect(self, object_path, connection):

1206

"""Overloading of standard D-Bus method.

1207

1208

Inserts annotation tags on methods and signals.

1209

"""

1210

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

1211

connection)

1212

try:

1213

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

1214

1215

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

1216

# Add annotation tags

1217

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

1218

for tag in if_tag.getElementsByTagName(typ):

1219

annots = dict()

1220

for name, prop in (self.

1221

_get_all_dbus_things(typ)):

1222

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

1223

and prop._dbus_interface

1224

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

1225

annots.update(getattr(

1226

prop, "_dbus_annotations", {}))

1227

for name, value in annots.items():

1228

ann_tag = document.createElement(

1229

"annotation")

1230

ann_tag.setAttribute("name", name)

1231

ann_tag.setAttribute("value", value)

1232

tag.appendChild(ann_tag)

1233

# Add interface annotation tags

1234

for annotation, value in dict(

1235

itertools.chain.from_iterable(

1236

annotations().items()

1237

for name, annotations

1238

in self._get_all_dbus_things("interface")

1239

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

1240

)).items():

1241

ann_tag = document.createElement("annotation")

1242

ann_tag.setAttribute("name", annotation)

1243

ann_tag.setAttribute("value", value)

1244

if_tag.appendChild(ann_tag)

1245

# Fix argument name for the Introspect method itself

1246

if (if_tag.getAttribute("name")

1247

== dbus.INTROSPECTABLE_IFACE):

1248

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

1249

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

1250

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

1251

if (arg.getAttribute("direction")

1252

== "out"):

1253

arg.setAttribute("name",

1254

"xml_data")

1255

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

1256

document.unlink()

1257

except (AttributeError, xml.dom.DOMException,

1258

xml.parsers.expat.ExpatError) as error:

1259

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

1260

exc_info=error)

1261

return xmlstring

1262

1263

1264

class DBusObjectWithProperties(DBusObjectWithAnnotations):

600

class DBusObjectWithProperties(dbus.service.Object):

1265

601

"""A D-Bus object with properties.

1266

602

1267

603

Classes inheriting from this can use the dbus_service_property

1268

604

decorator to expose methods as D-Bus properties. It exposes the

1269

605

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

1270

606

"""

1271

607

608

@staticmethod

609

def _is_dbus_property(obj):

610

return getattr(obj, "_dbus_is_property", False)

611

612

def _get_all_dbus_properties(self):

613

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

614

"""

615

return ((prop._dbus_name, prop)

616

for name, prop in

617

inspect.getmembers(self, self._is_dbus_property))

618

1272

619

def _get_dbus_property(self, interface_name, property_name):

1273

620

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

1274

621

property with the specified name and interface.

1275

622

"""

1276

for cls in self.__class__.__mro__:

1277

for name, value in inspect.getmembers(

1278

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

1279

if (value._dbus_name == property_name

1280

and value._dbus_interface == interface_name):

1281

return value.__get__(self)

1282

623

for name in (property_name,

624

property_name + "_dbus_property"):

625

prop = getattr(self, name, None)

626

if (prop is None

627

or not self._is_dbus_property(prop)

628

or prop._dbus_name != property_name

629

or (interface_name and prop._dbus_interface

630

and interface_name != prop._dbus_interface)):

631

continue

632

return prop

1283

633

# No such property

1284

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

1285

self.dbus_object_path, interface_name, property_name))

1286

1287

@classmethod

1288

def _get_all_interface_names(cls):

1289

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

1290

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

1291

"_dbus_interface", None)

1292

for x in (inspect.getmro(cls))

1293

for attr in dir(x))

1294

if name is not None)

1295

1296

@dbus.service.method(dbus.PROPERTIES_IFACE,

1297

in_signature="ss",

634

raise DBusPropertyNotFound(self.dbus_object_path + ":"

635

+ interface_name + "."

636

+ property_name)

637

638

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

1298

639

out_signature="v")

1299

640

def Get(self, interface_name, property_name):

1300

641

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

1318

659

# The byte_arrays option is not supported yet on

1319

660

# signatures other than "ay".

1320

661

if prop._dbus_signature != "ay":

1321

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

1322

"'ay' signature {!r}"

1323

.format(prop._dbus_signature))

1324

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

1325

for byte in value))

662

raise ValueError

663

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

664

for byte in value))

1326

665

prop(value)

1327

666

1328

@dbus.service.method(dbus.PROPERTIES_IFACE,

1329

in_signature="s",

667

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

1330

668

out_signature="a{sv}")

1331

669

def GetAll(self, interface_name):

1332

670

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

1333

671

standard.

1334

672

1335

673

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

1336

674

"""

1337

properties = {}

1338

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

675

all = {}

676

for name, prop in self._get_all_dbus_properties():

1339

677

if (interface_name

1340

678

and interface_name != prop._dbus_interface):

1341

679

# Interface non-empty but did not match

1345

683

continue

1346

684

value = prop()

1347

685

if not hasattr(value, "variant_level"):

1348

properties[name] = value

686

all[name] = value

1349

687

continue

1350

properties[name] = type(value)(

1351

value, variant_level = value.variant_level + 1)

1352

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

1353

1354

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

1355

def PropertiesChanged(self, interface_name, changed_properties,

1356

invalidated_properties):

1357

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

1358

standard.

1359

"""

1360

pass

688

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

689

value.variant_level+1)

690

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

1361

691

1362

692

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1363

693

out_signature="s",

1364

694

path_keyword='object_path',

1365

695

connection_keyword='connection')

1366

696

def Introspect(self, object_path, connection):

1367

"""Overloading of standard D-Bus method.

1368

1369

Inserts property tags and interface annotation tags.

697

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

1370

698

"""

1371

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1372

object_path,

1373

connection)

699

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

700

connection)

1374

701

try:

1375

702

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

1376

1377

703

def make_tag(document, name, prop):

1378

704

e = document.createElement("property")

1379

705

e.setAttribute("name", name)

1380

706

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

1381

707

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

1382

708

return e

1383

1384

709

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

1385

# Add property tags

1386

710

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

1387

711

for name, prop

1388

in self._get_all_dbus_things("property")

712

in self._get_all_dbus_properties()

1389

713

if prop._dbus_interface

1390

714

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

1391

715

if_tag.appendChild(tag)

1392

# Add annotation tags for properties

1393

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

1394

annots = dict()

1395

for name, prop in self._get_all_dbus_things(

1396

"property"):

1397

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

1398

and prop._dbus_interface

1399

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

1400

annots.update(getattr(

1401

prop, "_dbus_annotations", {}))

1402

for name, value in annots.items():

1403

ann_tag = document.createElement(

1404

"annotation")

1405

ann_tag.setAttribute("name", name)

1406

ann_tag.setAttribute("value", value)

1407

tag.appendChild(ann_tag)

1408

716

# Add the names to the return values for the

1409

717

# "org.freedesktop.DBus.Properties" methods

1410

718

if (if_tag.getAttribute("name")

1425

733

except (AttributeError, xml.dom.DOMException,

1426

734

xml.parsers.expat.ExpatError) as error:

1427

735

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

1428

exc_info=error)

1429

return xmlstring

1430

1431

try:

1432

dbus.OBJECT_MANAGER_IFACE

1433

except AttributeError:

1434

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

1435

1436

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1437

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

1438

1439

Classes inheriting from this exposes the standard

1440

GetManagedObjects call and the InterfacesAdded and

1441

InterfacesRemoved signals on the standard

1442

"org.freedesktop.DBus.ObjectManager" interface.

1443

1444

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

1445

manually.

1446

"""

1447

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1448

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

1449

def GetManagedObjects(self):

1450

"""This function must be overridden"""

1451

raise NotImplementedError()

1452

1453

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1454

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

1455

def InterfacesAdded(self, object_path, interfaces_and_properties):

1456

pass

1457

1458

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

1459

def InterfacesRemoved(self, object_path, interfaces):

1460

pass

1461

1462

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1463

out_signature = "s",

1464

path_keyword = 'object_path',

1465

connection_keyword = 'connection')

1466

def Introspect(self, object_path, connection):

1467

"""Overloading of standard D-Bus method.

1468

1469

Override return argument name of GetManagedObjects to be

1470

"objpath_interfaces_and_properties"

1471

"""

1472

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1473

object_path,

1474

connection)

1475

try:

1476

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

1477

1478

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

1479

# Fix argument name for the GetManagedObjects method

1480

if (if_tag.getAttribute("name")

1481

== dbus.OBJECT_MANAGER_IFACE):

1482

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

1483

if (cn.getAttribute("name")

1484

== "GetManagedObjects"):

1485

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

1486

if (arg.getAttribute("direction")

1487

== "out"):

1488

arg.setAttribute(

1489

"name",

1490

"objpath_interfaces"

1491

"_and_properties")

1492

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

1493

document.unlink()

1494

except (AttributeError, xml.dom.DOMException,

1495

xml.parsers.expat.ExpatError) as error:

1496

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

1497

exc_info = error)

1498

return xmlstring

1499

1500

def datetime_to_dbus(dt, variant_level=0):

1501

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

1502

if dt is None:

1503

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

1504

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

1505

1506

1507

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1508

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

1509

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

1510

interface names according to the "alt_interface_names" mapping.

1511

Usage:

1512

1513

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

1514

"net.example.AlternateInterface"})

1515

class SampleDBusObject(dbus.service.Object):

1516

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

1517

def SampleDBusMethod():

1518

pass

1519

1520

The above "SampleDBusMethod" on "SampleDBusObject" will be

1521

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

1522

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

1523

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

1524

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

1525

1526

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

1527

(from DBusObjectWithProperties) and interfaces (from the

1528

dbus_interface_annotations decorator).

1529

"""

1530

1531

def wrapper(cls):

1532

for orig_interface_name, alt_interface_name in (

1533

alt_interface_names.items()):

1534

attr = {}

1535

interface_names = set()

1536

# Go though all attributes of the class

1537

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

1538

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

1539

# with the wrong interface name

1540

if (not hasattr(attribute, "_dbus_interface")

1541

or not attribute._dbus_interface.startswith(

1542

orig_interface_name)):

1543

continue

1544

# Create an alternate D-Bus interface name based on

1545

# the current name

1546

alt_interface = attribute._dbus_interface.replace(

1547

orig_interface_name, alt_interface_name)

1548

interface_names.add(alt_interface)

1549

# Is this a D-Bus signal?

1550

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

1551

# Extract the original non-method undecorated

1552

# function by black magic

1553

if sys.version_info.major == 2:

1554

nonmethod_func = (dict(

1555

zip(attribute.func_code.co_freevars,

1556

attribute.__closure__))

1557

["func"].cell_contents)

1558

else:

1559

nonmethod_func = (dict(

1560

zip(attribute.__code__.co_freevars,

1561

attribute.__closure__))

1562

["func"].cell_contents)

1563

# Create a new, but exactly alike, function

1564

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

1565

# with the alternate D-Bus interface name

1566

new_function = copy_function(nonmethod_func)

1567

new_function = (dbus.service.signal(

1568

alt_interface,

1569

attribute._dbus_signature)(new_function))

1570

# Copy annotations, if any

1571

try:

1572

new_function._dbus_annotations = dict(

1573

attribute._dbus_annotations)

1574

except AttributeError:

1575

pass

1576

# Define a creator of a function to call both the

1577

# original and alternate functions, so both the

1578

# original and alternate signals gets sent when

1579

# the function is called

1580

def fixscope(func1, func2):

1581

"""This function is a scope container to pass

1582

func1 and func2 to the "call_both" function

1583

outside of its arguments"""

1584

1585

@functools.wraps(func2)

1586

def call_both(*args, **kwargs):

1587

"""This function will emit two D-Bus

1588

signals by calling func1 and func2"""

1589

func1(*args, **kwargs)

1590

func2(*args, **kwargs)

1591

# Make wrapper function look like a D-Bus signal

1592

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

1593

if name.startswith("_dbus_"):

1594

setattr(call_both, name, attr)

1595

1596

return call_both

1597

# Create the "call_both" function and add it to

1598

# the class

1599

attr[attrname] = fixscope(attribute, new_function)

1600

# Is this a D-Bus method?

1601

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

1602

# Create a new, but exactly alike, function

1603

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

1604

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

1605

# to the class.

1606

attr[attrname] = (

1607

dbus.service.method(

1608

alt_interface,

1609

attribute._dbus_in_signature,

1610

attribute._dbus_out_signature)

1611

(copy_function(attribute)))

1612

# Copy annotations, if any

1613

try:

1614

attr[attrname]._dbus_annotations = dict(

1615

attribute._dbus_annotations)

1616

except AttributeError:

1617

pass

1618

# Is this a D-Bus property?

1619

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

1620

# Create a new, but exactly alike, function

1621

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

1622

# property with the alternate D-Bus interface

1623

# name. Add it to the class.

1624

attr[attrname] = (dbus_service_property(

1625

alt_interface, attribute._dbus_signature,

1626

attribute._dbus_access,

1627

attribute._dbus_get_args_options

1628

["byte_arrays"])

1629

(copy_function(attribute)))

1630

# Copy annotations, if any

1631

try:

1632

attr[attrname]._dbus_annotations = dict(

1633

attribute._dbus_annotations)

1634

except AttributeError:

1635

pass

1636

# Is this a D-Bus interface?

1637

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

1638

# Create a new, but exactly alike, function

1639

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

1640

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

1641

# to the class.

1642

attr[attrname] = (

1643

dbus_interface_annotations(alt_interface)

1644

(copy_function(attribute)))

1645

if deprecate:

1646

# Deprecate all alternate interfaces

1647

iname="_AlternateDBusNames_interface_annotation{}"

1648

for interface_name in interface_names:

1649

1650

@dbus_interface_annotations(interface_name)

1651

def func(self):

1652

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

1653

"true" }

1654

# Find an unused name

1655

for aname in (iname.format(i)

1656

for i in itertools.count()):

1657

if aname not in attr:

1658

attr[aname] = func

1659

break

1660

if interface_names:

1661

# Replace the class with a new subclass of it with

1662

# methods, signals, etc. as created above.

1663

if sys.version_info.major == 2:

1664

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

1665

(cls, ), attr)

1666

else:

1667

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

1668

(cls, ), attr)

1669

return cls

1670

1671

return wrapper

1672

1673

1674

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

1675

"se.bsnet.fukt.Mandos"})

736

error)

737

return xmlstring

738

739

1676

740

class ClientDBus(Client, DBusObjectWithProperties):

1677

741

"""A Client class using D-Bus

1678

742

1682

746

"""

1683

747

1684

748

runtime_expansions = (Client.runtime_expansions

1685

+ ("dbus_object_path", ))

1686

1687

_interface = "se.recompile.Mandos.Client"

749

+ ("dbus_object_path",))

1688

750

1689

751

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

1690

752

1691

753

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

754

self._approvals_pending = 0

1692

755

self.bus = bus

1693

756

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

1694

757

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

1695

758

# the D-Bus

1696

client_object_name = str(self.name).translate(

759

client_object_name = unicode(self.name).translate(

1697

760

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

1698

761

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

1699

self.dbus_object_path = dbus.ObjectPath(

1700

"/clients/" + client_object_name)

762

self.dbus_object_path = (dbus.ObjectPath

763

("/clients/" + client_object_name))

1701

764

DBusObjectWithProperties.__init__(self, self.bus,

1702

765

self.dbus_object_path)

1703

1704

def notifychangeproperty(transform_func, dbus_name,

1705

type_func=lambda x: x,

1706

variant_level=1,

1707

invalidate_only=False,

1708

_interface=_interface):

1709

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

1710

its changes to DBus.

1711

1712

transform_fun: Function that takes a value and a variant_level

1713

and transforms it to a D-Bus type.

1714

dbus_name: D-Bus name of the variable

1715

type_func: Function that transform the value before sending it

1716

to the D-Bus. Default: no transform

1717

variant_level: D-Bus variant level. Default: 1

1718

"""

1719

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

1720

1721

def setter(self, value):

1722

if hasattr(self, "dbus_object_path"):

1723

if (not hasattr(self, attrname) or

1724

type_func(getattr(self, attrname, None))

1725

!= type_func(value)):

1726

if invalidate_only:

1727

self.PropertiesChanged(

1728

_interface, dbus.Dictionary(),

1729

dbus.Array((dbus_name, )))

1730

else:

1731

dbus_value = transform_func(

1732

type_func(value),

1733

variant_level = variant_level)

1734

self.PropertyChanged(dbus.String(dbus_name),

1735

dbus_value)

1736

self.PropertiesChanged(

1737

_interface,

1738

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

1739

dbus_value }),

1740

dbus.Array())

1741

setattr(self, attrname, value)

1742

1743

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

1744

1745

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1746

approvals_pending = notifychangeproperty(dbus.Boolean,

1747

"ApprovalPending",

1748

type_func = bool)

1749

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

1750

last_enabled = notifychangeproperty(datetime_to_dbus,

1751

"LastEnabled")

1752

checker = notifychangeproperty(

1753

dbus.Boolean, "CheckerRunning",

1754

type_func = lambda checker: checker is not None)

1755

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1756

"LastCheckedOK")

1757

last_checker_status = notifychangeproperty(dbus.Int16,

1758

"LastCheckerStatus")

1759

last_approval_request = notifychangeproperty(

1760

datetime_to_dbus, "LastApprovalRequest")

1761

approved_by_default = notifychangeproperty(dbus.Boolean,

1762

"ApprovedByDefault")

1763

approval_delay = notifychangeproperty(

1764

dbus.UInt64, "ApprovalDelay",

1765

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

1766

approval_duration = notifychangeproperty(

1767

dbus.UInt64, "ApprovalDuration",

1768

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

1769

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

1770

timeout = notifychangeproperty(

1771

dbus.UInt64, "Timeout",

1772

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

1773

extended_timeout = notifychangeproperty(

1774

dbus.UInt64, "ExtendedTimeout",

1775

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

1776

interval = notifychangeproperty(

1777

dbus.UInt64, "Interval",

1778

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

1779

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

1780

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

1781

invalidate_only=True)

1782

1783

del notifychangeproperty

766

767

def _get_approvals_pending(self):

768

return self._approvals_pending

769

def _set_approvals_pending(self, value):

770

old_value = self._approvals_pending

771

self._approvals_pending = value

772

bval = bool(value)

773

if (hasattr(self, "dbus_object_path")

774

and bval is not bool(old_value)):

775

dbus_bool = dbus.Boolean(bval, variant_level=1)

776

self.PropertyChanged(dbus.String("ApprovalPending"),

777

dbus_bool)

778

779

approvals_pending = property(_get_approvals_pending,

780

_set_approvals_pending)

781

del _get_approvals_pending, _set_approvals_pending

782

783

@staticmethod

784

def _datetime_to_dbus(dt, variant_level=0):

785

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

786

return dbus.String(dt.isoformat(),

787

variant_level=variant_level)

788

789

def enable(self):

790

oldstate = getattr(self, "enabled", False)

791

r = Client.enable(self)

792

if oldstate != self.enabled:

793

# Emit D-Bus signals

794

self.PropertyChanged(dbus.String("Enabled"),

795

dbus.Boolean(True, variant_level=1))

796

self.PropertyChanged(

797

dbus.String("LastEnabled"),

798

self._datetime_to_dbus(self.last_enabled,

799

variant_level=1))

800

return r

801

802

def disable(self, quiet = False):

803

oldstate = getattr(self, "enabled", False)

804

r = Client.disable(self, quiet=quiet)

805

if not quiet and oldstate != self.enabled:

806

# Emit D-Bus signal

807

self.PropertyChanged(dbus.String("Enabled"),

808

dbus.Boolean(False, variant_level=1))

809

return r

1784

810

1785

811

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

1786

812

try:

1791

817

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

1792

818

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

1793

819

1794

def checker_callback(self, source, condition,

1795

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

1796

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

1797

connection, command, *args,

1798

**kwargs)

1799

exitstatus = self.last_checker_status

1800

if exitstatus >= 0:

820

def checker_callback(self, pid, condition, command,

821

*args, **kwargs):

822

self.checker_callback_tag = None

823

self.checker = None

824

# Emit D-Bus signal

825

self.PropertyChanged(dbus.String("CheckerRunning"),

826

dbus.Boolean(False, variant_level=1))

827

if os.WIFEXITED(condition):

828

exitstatus = os.WEXITSTATUS(condition)

1801

829

# Emit D-Bus signal

1802

830

self.CheckerCompleted(dbus.Int16(exitstatus),

1803

# This is specific to GNU libC

1804

dbus.Int64(exitstatus << 8),

831

dbus.Int64(condition),

1805

832

dbus.String(command))

1806

833

else:

1807

834

# Emit D-Bus signal

1808

835

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

1809

dbus.Int64(

1810

# This is specific to GNU libC

1811

(exitstatus << 8)

1812

| self.last_checker_signal),

836

dbus.Int64(condition),

1813

837

dbus.String(command))

1814

return ret

838

839

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

840

*args, **kwargs)

841

842

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

843

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

844

# Emit D-Bus signal

845

self.PropertyChanged(

846

dbus.String("LastCheckedOK"),

847

(self._datetime_to_dbus(self.last_checked_ok,

848

variant_level=1)))

849

850

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

851

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

852

# Emit D-Bus signal

853

self.PropertyChanged(

854

dbus.String("LastApprovalRequest"),

855

(self._datetime_to_dbus(self.last_approval_request,

856

variant_level=1)))

857

return r

1815

858

1816

859

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

1817

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

860

old_checker = self.checker

861

if self.checker is not None:

862

old_checker_pid = self.checker.pid

863

else:

864

old_checker_pid = None

1818

865

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

1819

866

# Only if new checker process was started

1820

867

if (self.checker is not None

1821

868

and old_checker_pid != self.checker.pid):

1822

869

# Emit D-Bus signal

1823

870

self.CheckerStarted(self.current_checker_command)

871

self.PropertyChanged(

872

dbus.String("CheckerRunning"),

873

dbus.Boolean(True, variant_level=1))

1824

874

return r

1825

875

876

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

877

old_checker = getattr(self, "checker", None)

878

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

879

if (old_checker is not None

880

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

881

self.PropertyChanged(dbus.String("CheckerRunning"),

882

dbus.Boolean(False, variant_level=1))

883

return r

884

1826

885

def _reset_approved(self):

1827

self.approved = None

886

self._approved = None

1828

887

return False

1829

888

1830

889

def approve(self, value=True):

1831

self.approved = value

1832

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

1833

* 1000), self._reset_approved)

1834

890

self.send_changedstate()

891

self._approved = value

892

gobject.timeout_add(self._timedelta_to_milliseconds

893

(self.approval_duration),

894

self._reset_approved)

895

1835

896

1836

897

## D-Bus methods, signals & properties

1837

1838

## Interfaces

898

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

1839

899

1840

900

## Signals

1841

901

1852

912

pass

1853

913

1854

914

# PropertyChanged - signal

1855

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

1856

915

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

1857

916

def PropertyChanged(self, property, value):

1858

917

"D-Bus signal"

1892

951

self.checked_ok()

1893

952

1894

953

# Enable - method

1895

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

1896

954

@dbus.service.method(_interface)

1897

955

def Enable(self):

1898

956

"D-Bus method"

1899

957

self.enable()

1900

958

1901

959

# StartChecker - method

1902

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

1903

960

@dbus.service.method(_interface)

1904

961

def StartChecker(self):

1905

962

"D-Bus method"

1906

963

self.start_checker()

1907

964

1908

965

# Disable - method

1909

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

1910

966

@dbus.service.method(_interface)

1911

967

def Disable(self):

1912

968

"D-Bus method"

1913

969

self.disable()

1914

970

1915

971

# StopChecker - method

1916

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

1917

972

@dbus.service.method(_interface)

1918

973

def StopChecker(self):

1919

974

self.stop_checker()

1926

981

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

1927

982

1928

983

# ApprovedByDefault - property

1929

@dbus_service_property(_interface,

1930

signature="b",

984

@dbus_service_property(_interface, signature="b",

1931

985

access="readwrite")

1932

986

def ApprovedByDefault_dbus_property(self, value=None):

1933

987

if value is None: # get

1934

988

return dbus.Boolean(self.approved_by_default)

1935

989

self.approved_by_default = bool(value)

990

# Emit D-Bus signal

991

self.PropertyChanged(dbus.String("ApprovedByDefault"),

992

dbus.Boolean(value, variant_level=1))

1936

993

1937

994

# ApprovalDelay - property

1938

@dbus_service_property(_interface,

1939

signature="t",

995

@dbus_service_property(_interface, signature="t",

1940

996

access="readwrite")

1941

997

def ApprovalDelay_dbus_property(self, value=None):

1942

998

if value is None: # get

1943

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

1944

* 1000)

999

return dbus.UInt64(self.approval_delay_milliseconds())

1945

1000

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

1001

# Emit D-Bus signal

1002

self.PropertyChanged(dbus.String("ApprovalDelay"),

1003

dbus.UInt64(value, variant_level=1))

1946

1004

1947

1005

# ApprovalDuration - property

1948

@dbus_service_property(_interface,

1949

signature="t",

1006

@dbus_service_property(_interface, signature="t",

1950

1007

access="readwrite")

1951

1008

def ApprovalDuration_dbus_property(self, value=None):

1952

1009

if value is None: # get

1953

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

1954

* 1000)

1010

return dbus.UInt64(self._timedelta_to_milliseconds(

1011

self.approval_duration))

1955

1012

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

1013

# Emit D-Bus signal

1014

self.PropertyChanged(dbus.String("ApprovalDuration"),

1015

dbus.UInt64(value, variant_level=1))

1956

1016

1957

1017

# Name - property

1958

@dbus_annotations(

1959

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

1960

1018

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

1961

1019

def Name_dbus_property(self):

1962

1020

return dbus.String(self.name)

1963

1021

1964

1022

# Fingerprint - property

1965

@dbus_annotations(

1966

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

1967

1023

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

1968

1024

def Fingerprint_dbus_property(self):

1969

1025

return dbus.String(self.fingerprint)

1970

1026

1971

1027

# Host - property

1972

@dbus_service_property(_interface,

1973

signature="s",

1028

@dbus_service_property(_interface, signature="s",

1974

1029

access="readwrite")

1975

1030

def Host_dbus_property(self, value=None):

1976

1031

if value is None: # get

1977

1032

return dbus.String(self.host)

1978

self.host = str(value)

1033

self.host = value

1034

# Emit D-Bus signal

1035

self.PropertyChanged(dbus.String("Host"),

1036

dbus.String(value, variant_level=1))

1979

1037

1980

1038

# Created - property

1981

@dbus_annotations(

1982

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

1983

1039

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

1984

1040

def Created_dbus_property(self):

1985

return datetime_to_dbus(self.created)

1041

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

1986

1042

1987

1043

# LastEnabled - property

1988

1044

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

1989

1045

def LastEnabled_dbus_property(self):

1990

return datetime_to_dbus(self.last_enabled)

1046

if self.last_enabled is None:

1047

return dbus.String("")

1048

return dbus.String(self._datetime_to_dbus(self.last_enabled))

1991

1049

1992

1050

# Enabled - property

1993

@dbus_service_property(_interface,

1994

signature="b",

1051

@dbus_service_property(_interface, signature="b",

1995

1052

access="readwrite")

1996

1053

def Enabled_dbus_property(self, value=None):

1997

1054

if value is None: # get

2002

1059

self.disable()

2003

1060

2004

1061

# LastCheckedOK - property

2005

@dbus_service_property(_interface,

2006

signature="s",

1062

@dbus_service_property(_interface, signature="s",

2007

1063

access="readwrite")

2008

1064

def LastCheckedOK_dbus_property(self, value=None):

2009

1065

if value is not None:

2010

1066

self.checked_ok()

2011

1067

return

2012

return datetime_to_dbus(self.last_checked_ok)

2013

2014

# LastCheckerStatus - property

2015

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

2016

def LastCheckerStatus_dbus_property(self):

2017

return dbus.Int16(self.last_checker_status)

2018

2019

# Expires - property

2020

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

2021

def Expires_dbus_property(self):

2022

return datetime_to_dbus(self.expires)

1068

if self.last_checked_ok is None:

1069

return dbus.String("")

1070

return dbus.String(self._datetime_to_dbus(self

1071

.last_checked_ok))

2023

1072

2024

1073

# LastApprovalRequest - property

2025

1074

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

2026

1075

def LastApprovalRequest_dbus_property(self):

2027

return datetime_to_dbus(self.last_approval_request)

1076

if self.last_approval_request is None:

1077

return dbus.String("")

1078

return dbus.String(self.

1079

_datetime_to_dbus(self

1080

.last_approval_request))

2028

1081

2029

1082

# Timeout - property

2030

@dbus_service_property(_interface,

2031

signature="t",

1083

@dbus_service_property(_interface, signature="t",

2032

1084

access="readwrite")

2033

1085

def Timeout_dbus_property(self, value=None):

2034

1086

if value is None: # get

2035

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

2036

old_timeout = self.timeout

1087

return dbus.UInt64(self.timeout_milliseconds())

2037

1088

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

2038

# Reschedule disabling

2039

if self.enabled:

2040

now = datetime.datetime.utcnow()

2041

self.expires += self.timeout - old_timeout

2042

if self.expires <= now:

2043

# The timeout has passed

2044

self.disable()

2045

else:

2046

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

2047

is None):

2048

return

2049

GLib.source_remove(self.disable_initiator_tag)

2050

self.disable_initiator_tag = GLib.timeout_add(

2051

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

2052

self.disable)

2053

2054

# ExtendedTimeout - property

2055

@dbus_service_property(_interface,

2056

signature="t",

2057

access="readwrite")

2058

def ExtendedTimeout_dbus_property(self, value=None):

2059

if value is None: # get

2060

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

2061

* 1000)

2062

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

1089

# Emit D-Bus signal

1090

self.PropertyChanged(dbus.String("Timeout"),

1091

dbus.UInt64(value, variant_level=1))

1092

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

1093

return

1094

# Reschedule timeout

1095

gobject.source_remove(self.disable_initiator_tag)

1096

self.disable_initiator_tag = None

1097

time_to_die = (self.

1098

_timedelta_to_milliseconds((self

1099

.last_checked_ok

1100

+ self.timeout)

1101

- datetime.datetime

1102

.utcnow()))

1103

if time_to_die <= 0:

1104

# The timeout has passed

1105

self.disable()

1106

else:

1107

self.disable_initiator_tag = (gobject.timeout_add

1108

(time_to_die, self.disable))

2063

1109

2064

1110

# Interval - property

2065

@dbus_service_property(_interface,

2066

signature="t",

1111

@dbus_service_property(_interface, signature="t",

2067

1112

access="readwrite")

2068

1113

def Interval_dbus_property(self, value=None):

2069

1114

if value is None: # get

2070

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

1115

return dbus.UInt64(self.interval_milliseconds())

2071

1116

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

1117

# Emit D-Bus signal

1118

self.PropertyChanged(dbus.String("Interval"),

1119

dbus.UInt64(value, variant_level=1))

2072

1120

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

2073

1121

return

2074

if self.enabled:

2075

# Reschedule checker run

2076

GLib.source_remove(self.checker_initiator_tag)

2077

self.checker_initiator_tag = GLib.timeout_add(

2078

value, self.start_checker)

2079

self.start_checker() # Start one now, too

2080

1122

# Reschedule checker run

1123

gobject.source_remove(self.checker_initiator_tag)

1124

self.checker_initiator_tag = (gobject.timeout_add

1125

(value, self.start_checker))

1126

self.start_checker() # Start one now, too

1127

2081

1128

# Checker - property

2082

@dbus_service_property(_interface,

2083

signature="s",

1129

@dbus_service_property(_interface, signature="s",

2084

1130

access="readwrite")

2085

1131

def Checker_dbus_property(self, value=None):

2086

1132

if value is None: # get

2087

1133

return dbus.String(self.checker_command)

2088

self.checker_command = str(value)

1134

self.checker_command = value

1135

# Emit D-Bus signal

1136

self.PropertyChanged(dbus.String("Checker"),

1137

dbus.String(self.checker_command,

1138

variant_level=1))

2089

1139

2090

1140

# CheckerRunning - property

2091

@dbus_service_property(_interface,

2092

signature="b",

1141

@dbus_service_property(_interface, signature="b",

2093

1142

access="readwrite")

2094

1143

def CheckerRunning_dbus_property(self, value=None):

2095

1144

if value is None: # get

2100

1149

self.stop_checker()

2101

1150

2102

1151

# ObjectPath - property

2103

@dbus_annotations(

2104

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

2105

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

2106

1152

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

2107

1153

def ObjectPath_dbus_property(self):

2108

1154

return self.dbus_object_path # is already a dbus.ObjectPath

2109

1155

2110

1156

# Secret = property

2111

@dbus_annotations(

2112

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

2113

"invalidates"})

2114

@dbus_service_property(_interface,

2115

signature="ay",

2116

access="write",

2117

byte_arrays=True)

1157

@dbus_service_property(_interface, signature="ay",

1158

access="write", byte_arrays=True)

2118

1159

def Secret_dbus_property(self, value):

2119

self.secret = bytes(value)

1160

self.secret = str(value)

2120

1161

2121

1162

del _interface

2122

1163

2126

1167

self._pipe = child_pipe

2127

1168

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

2128

1169

if not self._pipe.recv():

2129

raise KeyError(fpr)

2130

1170

raise KeyError()

1171

2131

1172

def __getattribute__(self, name):

2132

if name == '_pipe':

1173

if(name == '_pipe'):

2133

1174

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

2134

1175

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

2135

1176

data = self._pipe.recv()

2136

1177

if data[0] == 'data':

2137

1178

return data[1]

2138

1179

if data[0] == 'function':

2139

2140

1180

def func(*args, **kwargs):

2141

1181

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

2142

1182

return self._pipe.recv()[1]

2143

2144

1183

return func

2145

1184

2146

1185

def __setattr__(self, name, value):

2147

if name == '_pipe':

1186

if(name == '_pipe'):

2148

1187

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

2149

1188

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

2150

1189

2158

1197

def handle(self):

2159

1198

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

2160

1199

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

2161

str(self.client_address))

1200

unicode(self.client_address))

2162

1201

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

2163

1202

self.server.child_pipe.fileno())

2164

2165

session = gnutls.ClientSession(self.request)

2166

1203

1204

session = (gnutls.connection

1205

.ClientSession(self.request,

1206

gnutls.connection

1207

.X509Credentials()))

1208

1209

# Note: gnutls.connection.X509Credentials is really a

1210

# generic GnuTLS certificate credentials object so long as

1211

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

1212

# here despite using OpenPGP certificates.

1213

2167

1214

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

2168

1215

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

2169

1216

# "+COMP-NULL", "+CTYPE-OPENPGP",

2172

1219

priority = self.server.gnutls_priority

2173

1220

if priority is None:

2174

1221

priority = "NORMAL"

2175

gnutls.priority_set_direct(session._c_object, priority,

2176

None)

2177

1222

(gnutls.library.functions

1223

.gnutls_priority_set_direct(session._c_object,

1224

priority, None))

1225

2178

1226

# Start communication using the Mandos protocol

2179

1227

# Get protocol number

2180

1228

line = self.request.makefile().readline()

2181

1229

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

2182

1230

try:

2183

1231

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

2184

raise RuntimeError(line)

1232

raise RuntimeError

2185

1233

except (ValueError, IndexError, RuntimeError) as error:

2186

1234

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

2187

1235

return

2188

1236

2189

1237

# Start GnuTLS connection

2190

1238

try:

2191

1239

session.handshake()

2192

except gnutls.Error as error:

1240

except gnutls.errors.GNUTLSError as error:

2193

1241

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

2194

1242

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

2195

1243

# established. Just abandon the request.

2196

1244

return

2197

1245

logger.debug("Handshake succeeded")

2198

1246

2199

1247

approval_required = False

2200

1248

try:

2201

1249

try:

2202

fpr = self.fingerprint(

2203

self.peer_certificate(session))

2204

except (TypeError, gnutls.Error) as error:

1250

fpr = self.fingerprint(self.peer_certificate

1251

(session))

1252

except (TypeError,

1253

gnutls.errors.GNUTLSError) as error:

2205

1254

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

2206

1255

return

2207

1256

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

2208

1257

2209

1258

try:

2210

1259

client = ProxyClient(child_pipe, fpr,

2211

1260

self.client_address)

2220

1269

while True:

2221

1270

if not client.enabled:

2222

1271

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

2223

client.name)

1272

client.name)

2224

1273

if self.server.use_dbus:

2225

1274

# Emit D-Bus signal

2226

client.Rejected("Disabled")

1275

client.Rejected("Disabled")

2227

1276

return

2228

1277

2229

if client.approved or not client.approval_delay:

1278

if client._approved or not client.approval_delay:

2230

1279

#We are approved or approval is disabled

2231

1280

break

2232

elif client.approved is None:

1281

elif client._approved is None:

2233

1282

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

2234

1283

client.name)

2235

1284

if self.server.use_dbus:

2236

1285

# Emit D-Bus signal

2237

1286

client.NeedApproval(

2238

client.approval_delay.total_seconds()

2239

* 1000, client.approved_by_default)

1287

client.approval_delay_milliseconds(),

1288

client.approved_by_default)

2240

1289

else:

2241

1290

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

2242

1291

client.name)

2246

1295

return

2247

1296

2248

1297

#wait until timeout or approved

1298

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

2249

1299

time = datetime.datetime.now()

2250

1300

client.changedstate.acquire()

2251

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

1301

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

2252

1302

client.changedstate.release()

2253

1303

time2 = datetime.datetime.now()

2254

1304

if (time2 - time) >= delay:

2265

1315

else:

2266

1316

delay -= time2 - time

2267

1317

2268

try:

2269

session.send(client.secret)

2270

except gnutls.Error as error:

2271

logger.warning("gnutls send failed",

2272

exc_info = error)

2273

return

2274

1318

sent_size = 0

1319

while sent_size < len(client.secret):

1320

try:

1321

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

1322

except gnutls.errors.GNUTLSError as error:

1323

logger.warning("gnutls send failed")

1324

return

1325

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

1326

sent, len(client.secret)

1327

- (sent_size + sent))

1328

sent_size += sent

1329

2275

1330

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

2276

# bump the timeout using extended_timeout

2277

client.bump_timeout(client.extended_timeout)

1331

# bump the timeout as if seen

1332

client.checked_ok()

2278

1333

if self.server.use_dbus:

2279

1334

# Emit D-Bus signal

2280

1335

client.GotSecret()

2284

1339

client.approvals_pending -= 1

2285

1340

try:

2286

1341

session.bye()

2287

except gnutls.Error as error:

2288

logger.warning("GnuTLS bye failed",

2289

exc_info=error)

1342

except gnutls.errors.GNUTLSError as error:

1343

logger.warning("GnuTLS bye failed")

2290

1344

2291

1345

@staticmethod

2292

1346

def peer_certificate(session):

2293

1347

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

2294

1348

# If not an OpenPGP certificate...

2295

if (gnutls.certificate_type_get(session._c_object)

2296

!= gnutls.CRT_OPENPGP):

2297

# ...return invalid data

2298

return b""

1349

if (gnutls.library.functions

1350

.gnutls_certificate_type_get(session._c_object)

1351

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1352

# ...do the normal thing

1353

return session.peer_certificate

2299

1354

list_size = ctypes.c_uint(1)

2300

cert_list = (gnutls.certificate_get_peers

1355

cert_list = (gnutls.library.functions

1356

.gnutls_certificate_get_peers

2301

1357

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

2302

1358

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

2303

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

1359

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

1360

" certificate")

2304

1361

if list_size.value == 0:

2305

1362

return None

2306

1363

cert = cert_list[0]

2310

1367

def fingerprint(openpgp):

2311

1368

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2312

1369

# New GnuTLS "datum" with the OpenPGP public key

2313

datum = gnutls.datum_t(

2314

ctypes.cast(ctypes.c_char_p(openpgp),

2315

ctypes.POINTER(ctypes.c_ubyte)),

2316

ctypes.c_uint(len(openpgp)))

1370

datum = (gnutls.library.types

1371

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

1372

ctypes.POINTER

1373

(ctypes.c_ubyte)),

1374

ctypes.c_uint(len(openpgp))))

2317

1375

# New empty GnuTLS certificate

2318

crt = gnutls.openpgp_crt_t()

2319

gnutls.openpgp_crt_init(ctypes.byref(crt))

1376

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1377

(gnutls.library.functions

1378

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2320

1379

# Import the OpenPGP public key into the certificate

2321

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

2322

gnutls.OPENPGP_FMT_RAW)

1380

(gnutls.library.functions

1381

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

1382

gnutls.library.constants

1383

.GNUTLS_OPENPGP_FMT_RAW))

2323

1384

# Verify the self signature in the key

2324

1385

crtverify = ctypes.c_uint()

2325

gnutls.openpgp_crt_verify_self(crt, 0,

2326

ctypes.byref(crtverify))

1386

(gnutls.library.functions

1387

.gnutls_openpgp_crt_verify_self(crt, 0,

1388

ctypes.byref(crtverify)))

2327

1389

if crtverify.value != 0:

2328

gnutls.openpgp_crt_deinit(crt)

2329

raise gnutls.CertificateSecurityError("Verify failed")

1390

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1391

raise (gnutls.errors.CertificateSecurityError

1392

("Verify failed"))

2330

1393

# New buffer for the fingerprint

2331

1394

buf = ctypes.create_string_buffer(20)

2332

1395

buf_len = ctypes.c_size_t()

2333

1396

# Get the fingerprint from the certificate into the buffer

2334

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

2335

ctypes.byref(buf_len))

1397

(gnutls.library.functions

1398

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

1399

ctypes.byref(buf_len)))

2336

1400

# Deinit the certificate

2337

gnutls.openpgp_crt_deinit(crt)

1401

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2338

1402

# Convert the buffer to a Python bytestring

2339

1403

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

2340

1404

# Convert the bytestring to hexadecimal notation

2341

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

1405

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

2342

1406

return hex_fpr

2343

1407

2344

1408

2345

1409

class MultiprocessingMixIn(object):

2346

1410

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

2347

2348

1411

def sub_process_main(self, request, address):

2349

1412

try:

2350

1413

self.finish_request(request, address)

2351

except Exception:

1414

except:

2352

1415

self.handle_error(request, address)

2353

1416

self.close_request(request)

2354

1417

2355

1418

def process_request(self, request, address):

2356

1419

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

2357

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

2358

args = (request, address))

2359

proc.start()

2360

return proc

2361

1420

multiprocessing.Process(target = self.sub_process_main,

1421

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

2362

1422

2363

1423

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2364

1424

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

2365

2366

1425

def process_request(self, request, client_address):

2367

1426

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

2368

1427

2369

1428

This function creates a new pipe in self.pipe

2370

1429

"""

2371

1430

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2372

2373

proc = MultiprocessingMixIn.process_request(self, request,

2374

client_address)

1431

1432

super(MultiprocessingMixInWithPipe,

1433

self).process_request(request, client_address)

2375

1434

self.child_pipe.close()

2376

self.add_pipe(parent_pipe, proc)

2377

2378

def add_pipe(self, parent_pipe, proc):

1435

self.add_pipe(parent_pipe)

1436

1437

def add_pipe(self, parent_pipe):

2379

1438

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

2380

raise NotImplementedError()

2381

1439

raise NotImplementedError

2382

1440

2383

1441

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2384

1442

socketserver.TCPServer, object):

2389

1447

interface: None or a network interface name (string)

2390

1448

use_ipv6: Boolean; to use IPv6 or not

2391

1449

"""

2392

2393

1450

def __init__(self, server_address, RequestHandlerClass,

2394

interface=None,

2395

use_ipv6=True,

2396

socketfd=None):

2397

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

2398

creating a new one with socket.socket().

2399

"""

1451

interface=None, use_ipv6=True):

2400

1452

self.interface = interface

2401

1453

if use_ipv6:

2402

1454

self.address_family = socket.AF_INET6

2403

if socketfd is not None:

2404

# Save the file descriptor

2405

self.socketfd = socketfd

2406

# Save the original socket.socket() function

2407

self.socket_socket = socket.socket

2408

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

2409

#

2410

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

2411

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

2412

# patching socket.socket.)

2413

#

2414

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

2415

@functools.wraps(socket.socket)

2416

def socket_wrapper(*args, **kwargs):

2417

# Restore original function so subsequent calls are

2418

# not affected.

2419

socket.socket = self.socket_socket

2420

del self.socket_socket

2421

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

2422

# saved file descriptor.

2423

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

2424

# Replace socket.socket() function with wrapper

2425

socket.socket = socket_wrapper

2426

# The socketserver.TCPServer.__init__ will call

2427

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

2428

# socket_wrapper(), if socketfd was set.

2429

1455

socketserver.TCPServer.__init__(self, server_address,

2430

1456

RequestHandlerClass)

2431

2432

1457

def server_bind(self):

2433

1458

"""This overrides the normal server_bind() function

2434

1459

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

2440

1465

self.interface)

2441

1466

else:

2442

1467

try:

2443

self.socket.setsockopt(

2444

socket.SOL_SOCKET, SO_BINDTODEVICE,

2445

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

1468

self.socket.setsockopt(socket.SOL_SOCKET,

1469

SO_BINDTODEVICE,

1470

str(self.interface

1471

+ '\0'))

2446

1472

except socket.error as error:

2447

if error.errno == errno.EPERM:

2448

logger.error("No permission to bind to"

2449

" interface %s", self.interface)

2450

elif error.errno == errno.ENOPROTOOPT:

1473

if error[0] == errno.EPERM:

1474

logger.error("No permission to"

1475

" bind to interface %s",

1476

self.interface)

1477

elif error[0] == errno.ENOPROTOOPT:

2451

1478

logger.error("SO_BINDTODEVICE not available;"

2452

1479

" cannot bind to interface %s",

2453

1480

self.interface)

2454

elif error.errno == errno.ENODEV:

2455

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

2456

" cannot bind", self.interface)

2457

1481

else:

2458

1482

raise

2459

1483

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

2462

1486

if self.address_family == socket.AF_INET6:

2463

1487

any_address = "::" # in6addr_any

2464

1488

else:

2465

any_address = "0.0.0.0" # INADDR_ANY

1489

any_address = socket.INADDR_ANY

2466

1490

self.server_address = (any_address,

2467

1491

self.server_address[1])

2468

1492

elif not self.server_address[1]:

2469

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

1493

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

1494

0)

2470

1495

# if self.interface:

2471

1496

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

2472

1497

# 0, # port

2484

1509

gnutls_priority GnuTLS priority string

2485

1510

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

2486

1511

2487

Assumes a GLib.MainLoop event loop.

1512

Assumes a gobject.MainLoop event loop.

2488

1513

"""

2489

2490

1514

def __init__(self, server_address, RequestHandlerClass,

2491

interface=None,

2492

use_ipv6=True,

2493

clients=None,

2494

gnutls_priority=None,

2495

use_dbus=True,

2496

socketfd=None):

1515

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

1516

gnutls_priority=None, use_dbus=True):

2497

1517

self.enabled = False

2498

1518

self.clients = clients

2499

1519

if self.clients is None:

2500

self.clients = {}

1520

self.clients = set()

2501

1521

self.use_dbus = use_dbus

2502

1522

self.gnutls_priority = gnutls_priority

2503

1523

IPv6_TCPServer.__init__(self, server_address,

2504

1524

RequestHandlerClass,

2505

1525

interface = interface,

2506

use_ipv6 = use_ipv6,

2507

socketfd = socketfd)

2508

1526

use_ipv6 = use_ipv6)

2509

1527

def server_activate(self):

2510

1528

if self.enabled:

2511

1529

return socketserver.TCPServer.server_activate(self)

2512

2513

1530

def enable(self):

2514

1531

self.enabled = True

2515

2516

def add_pipe(self, parent_pipe, proc):

1532

def add_pipe(self, parent_pipe):

2517

1533

# Call "handle_ipc" for both data and EOF events

2518

GLib.io_add_watch(

2519

parent_pipe.fileno(),

2520

GLib.IO_IN | GLib.IO_HUP,

2521

functools.partial(self.handle_ipc,

2522

parent_pipe = parent_pipe,

2523

proc = proc))

2524

2525

def handle_ipc(self, source, condition,

2526

parent_pipe=None,

2527

proc = None,

1534

gobject.io_add_watch(parent_pipe.fileno(),

1535

gobject.IO_IN | gobject.IO_HUP,

1536

functools.partial(self.handle_ipc,

1537

parent_pipe = parent_pipe))

1538

1539

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

2528

1540

client_object=None):

2529

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

2530

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

2531

# Wait for other process to exit

2532

proc.join()

1541

condition_names = {

1542

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

1543

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

1544

# blocking).

1545

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

1546

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

1547

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

1548

# broken, usually for pipes and

1549

# sockets).

1550

}

1551

conditions_string = ' | '.join(name

1552

for cond, name in

1553

condition_names.iteritems()

1554

if cond & condition)

1555

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

1556

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

2533

1557

return False

2534

1558

2535

1559

# Read a request from the child

2540

1564

fpr = request[1]

2541

1565

address = request[2]

2542

1566

2543

for c in self.clients.values():

1567

for c in self.clients:

2544

1568

if c.fingerprint == fpr:

2545

1569

client = c

2546

1570

break

2549

1573

"dress: %s", fpr, address)

2550

1574

if self.use_dbus:

2551

1575

# Emit D-Bus signal

2552

mandos_dbus_service.ClientNotFound(fpr,

2553

address[0])

1576

mandos_dbus_service.ClientNotFound(fpr, address[0])

2554

1577

parent_pipe.send(False)

2555

1578

return False

2556

1579

2557

GLib.io_add_watch(

2558

parent_pipe.fileno(),

2559

GLib.IO_IN | GLib.IO_HUP,

2560

functools.partial(self.handle_ipc,

2561

parent_pipe = parent_pipe,

2562

proc = proc,

2563

client_object = client))

1580

gobject.io_add_watch(parent_pipe.fileno(),

1581

gobject.IO_IN | gobject.IO_HUP,

1582

functools.partial(self.handle_ipc,

1583

parent_pipe = parent_pipe,

1584

client_object = client))

2564

1585

parent_pipe.send(True)

2565

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

2566

# same fileno

1586

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

2567

1587

return False

2568

1588

if command == 'funcall':

2569

1589

funcname = request[1]

2570

1590

args = request[2]

2571

1591

kwargs = request[3]

2572

1592

2573

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

2574

funcname)(*args,

2575

**kwargs)))

2576

1593

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

1594

2577

1595

if command == 'getattr':

2578

1596

attrname = request[1]

2579

if isinstance(client_object.__getattribute__(attrname),

2580

collections.Callable):

2581

parent_pipe.send(('function', ))

1597

if callable(client_object.__getattribute__(attrname)):

1598

parent_pipe.send(('function',))

2582

1599

else:

2583

parent_pipe.send((

2584

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

1600

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

2585

1601

2586

1602

if command == 'setattr':

2587

1603

attrname = request[1]

2588

1604

value = request[2]

2589

1605

setattr(client_object, attrname, value)

2590

1606

2591

1607

return True

2592

1608

2593

1609

2594

def rfc3339_duration_to_delta(duration):

2595

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

2596

2597

>>> rfc3339_duration_to_delta("P7D")

2598

datetime.timedelta(7)

2599

>>> rfc3339_duration_to_delta("PT60S")

2600

datetime.timedelta(0, 60)

2601

>>> rfc3339_duration_to_delta("PT60M")

2602

datetime.timedelta(0, 3600)

2603

>>> rfc3339_duration_to_delta("PT24H")

2604

datetime.timedelta(1)

2605

>>> rfc3339_duration_to_delta("P1W")

2606

datetime.timedelta(7)

2607

>>> rfc3339_duration_to_delta("PT5M30S")

2608

datetime.timedelta(0, 330)

2609

>>> rfc3339_duration_to_delta("P1DT3M20S")

2610

datetime.timedelta(1, 200)

2611

"""

2612

2613

# Parsing an RFC 3339 duration with regular expressions is not

2614

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

2615

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

2616

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

2617

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

2618

# avoid excessive use of external libraries.

2619

2620

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

2621

Token = collections.namedtuple("Token", (

2622

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

2623

# a "group" containing digits

2624

"value", # datetime.timedelta or None

2625

"followers")) # Tokens valid after this token

2626

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

2627

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

2628

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

2629

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

2630

datetime.timedelta(seconds=1),

2631

frozenset((token_end, )))

2632

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

2633

datetime.timedelta(minutes=1),

2634

frozenset((token_second, token_end)))

2635

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

2636

datetime.timedelta(hours=1),

2637

frozenset((token_minute, token_end)))

2638

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

2639

None,

2640

frozenset((token_hour, token_minute,

2641

token_second)))

2642

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

2643

datetime.timedelta(days=1),

2644

frozenset((token_time, token_end)))

2645

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

2646

datetime.timedelta(weeks=4),

2647

frozenset((token_day, token_end)))

2648

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

2649

datetime.timedelta(weeks=52),

2650

frozenset((token_month, token_end)))

2651

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

2652

datetime.timedelta(weeks=1),

2653

frozenset((token_end, )))

2654

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

2655

frozenset((token_year, token_month,

2656

token_day, token_time,

2657

token_week)))

2658

# Define starting values

2659

value = datetime.timedelta() # Value so far

2660

found_token = None

2661

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

2662

s = duration # String left to parse

2663

# Loop until end token is found

2664

while found_token is not token_end:

2665

# Search for any currently valid tokens

2666

for token in followers:

2667

match = token.regexp.match(s)

2668

if match is not None:

2669

# Token found

2670

if token.value is not None:

2671

# Value found, parse digits

2672

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

2673

# Add to value so far

2674

value += factor * token.value

2675

# Strip token from string

2676

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

2677

# Go to found token

2678

found_token = token

2679

# Set valid next tokens

2680

followers = found_token.followers

2681

break

2682

else:

2683

# No currently valid tokens were found

2684

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

2685

.format(duration))

2686

# End token found

2687

return value

2688

2689

2690

1610

def string_to_delta(interval):

2691

1611

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

2692

1612

2703

1623

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

2704

1624

datetime.timedelta(0, 330)

2705

1625

"""

2706

2707

try:

2708

return rfc3339_duration_to_delta(interval)

2709

except ValueError:

2710

pass

2711

2712

1626

timevalue = datetime.timedelta(0)

2713

1627

for s in interval.split():

2714

1628

try:

2715

suffix = s[-1]

1629

suffix = unicode(s[-1])

2716

1630

value = int(s[:-1])

2717

1631

if suffix == "d":

2718

1632

delta = datetime.timedelta(value)

2725

1639

elif suffix == "w":

2726

1640

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

2727

1641

else:

2728

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

2729

except IndexError as e:

1642

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

1643

except (ValueError, IndexError) as e:

2730

1644

raise ValueError(*(e.args))

2731

1645

timevalue += delta

2732

1646

return timevalue

2733

1647

2734

1648

1649

def if_nametoindex(interface):

1650

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

1651

1652

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

1653

global if_nametoindex

1654

try:

1655

if_nametoindex = (ctypes.cdll.LoadLibrary

1656

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

1657

.if_nametoindex)

1658

except (OSError, AttributeError):

1659

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

1660

def if_nametoindex(interface):

1661

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

1662

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

1663

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

1664

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1665

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

1666

interface))

1667

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

1668

ifreq[16:20])[0]

1669

return interface_index

1670

return if_nametoindex(interface)

1671

1672

2735

1673

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

2736

1674

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

2737

1675

2745

1683

sys.exit()

2746

1684

if not noclose:

2747

1685

# Close all standard open file descriptors

2748

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

1686

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

2749

1687

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

2750

1688

raise OSError(errno.ENODEV,

2751

"{} not a character device"

2752

.format(os.devnull))

1689

"%s not a character device"

1690

% os.path.devnull)

2753

1691

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

2754

1692

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

2755

1693

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

2764

1702

2765

1703

parser = argparse.ArgumentParser()

2766

1704

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

2767

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

1705

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

2768

1706

help="show version number and exit")

2769

1707

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

2770

1708

help="Bind to interface IF")

2776

1714

help="Run self-test")

2777

1715

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

2778

1716

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

2779

" to terminal", default=None)

1717

" to terminal")

2780

1718

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

2781

1719

help="Debug level for stdout output")

2782

1720

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

2789

1727

" files")

2790

1728

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

2791

1729

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

2792

" system bus interface", default=None)

1730

" system bus interface")

2793

1731

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

2794

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

2795

default=None)

2796

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

2797

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

2798

" state", default=None)

2799

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

2800

help="Specify a file descriptor to a network"

2801

" socket to use instead of creating one")

2802

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

2803

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

2804

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

2805

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

2806

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

2807

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

2808

default=None)

2809

1732

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

2810

1733

options = parser.parse_args()

2811

1734

2812

1735

if options.check:

2813

1736

import doctest

2814

fail_count, test_count = doctest.testmod()

2815

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

1737

doctest.testmod()

1738

sys.exit()

2816

1739

2817

1740

# Default values for config file for server-global settings

2818

1741

server_defaults = { "interface": "",

2820

1743

"port": "",

2821

1744

"debug": "False",

2822

1745

"priority":

2823

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

2824

":+SIGN-DSA-SHA256",

1746

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

2825

1747

"servicename": "Mandos",

2826

1748

"use_dbus": "True",

2827

1749

"use_ipv6": "True",

2828

1750

"debuglevel": "",

2829

"restore": "True",

2830

"socket": "",

2831

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

2832

"foreground": "False",

2833

"zeroconf": "True",

2834

}

1751

}

2835

1752

2836

1753

# Parse config file for server-global settings

2837

1754

server_config = configparser.SafeConfigParser(server_defaults)

2838

1755

del server_defaults

2839

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

1756

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

1757

"mandos.conf"))

2840

1758

# Convert the SafeConfigParser object to a dict

2841

1759

server_settings = server_config.defaults()

2842

1760

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

2843

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

1761

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

2844

1762

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

2845

1763

option)

2846

1764

if server_settings["port"]:

2847

1765

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

2848

1766

"port")

2849

if server_settings["socket"]:

2850

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

2851

"socket")

2852

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

2853

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

2854

# happen with a supplied network socket.

2855

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

2856

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

2857

["socket"])

2858

1767

del server_config

2859

1768

2860

1769

# Override the settings from the config file with command line

2861

1770

# options, if set.

2862

1771

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

2863

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

2864

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

2865

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

1772

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

1773

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

2866

1774

value = getattr(options, option)

2867

1775

if value is not None:

2868

1776

server_settings[option] = value

2869

1777

del options

2870

1778

# Force all strings to be unicode

2871

1779

for option in server_settings.keys():

2872

if isinstance(server_settings[option], bytes):

2873

server_settings[option] = (server_settings[option]

2874

.decode("utf-8"))

2875

# Force all boolean options to be boolean

2876

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

2877

"foreground", "zeroconf"):

2878

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

2879

# Debug implies foreground

2880

if server_settings["debug"]:

2881

server_settings["foreground"] = True

1780

if type(server_settings[option]) is str:

1781

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

2882

1782

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

2883

1783

2884

1784

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

2885

1785

2886

if (not server_settings["zeroconf"]

2887

and not (server_settings["port"]

2888

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

2889

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

2890

2891

1786

# For convenience

2892

1787

debug = server_settings["debug"]

2893

1788

debuglevel = server_settings["debuglevel"]

2894

1789

use_dbus = server_settings["use_dbus"]

2895

1790

use_ipv6 = server_settings["use_ipv6"]

2896

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

2897

stored_state_file)

2898

foreground = server_settings["foreground"]

2899

zeroconf = server_settings["zeroconf"]

2900

2901

if debug:

2902

initlogger(debug, logging.DEBUG)

2903

else:

2904

if not debuglevel:

2905

initlogger(debug)

2906

else:

2907

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

2908

initlogger(debug, level)

2909

1791

2910

1792

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

2911

syslogger.setFormatter(

2912

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

2913

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

2914

server_settings["servicename"])))

1793

syslogger.setFormatter(logging.Formatter

1794

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

1795

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

1796

% server_settings["servicename"]))

2915

1797

2916

1798

# Parse config file with clients

2917

client_config = configparser.SafeConfigParser(Client

2918

.client_defaults)

1799

client_defaults = { "timeout": "1h",

1800

"interval": "5m",

1801

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

1802

"host": "",

1803

"approval_delay": "0s",

1804

"approval_duration": "1s",

1805

}

1806

client_config = configparser.SafeConfigParser(client_defaults)

2919

1807

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

2920

1808

"clients.conf"))

2921

1809

2922

1810

global mandos_dbus_service

2923

1811

mandos_dbus_service = None

2924

1812

2925

socketfd = None

2926

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

2927

socketfd = server_settings["socket"]

2928

tcp_server = MandosServer(

2929

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

2930

ClientHandler,

2931

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

2932

use_ipv6=use_ipv6,

2933

gnutls_priority=server_settings["priority"],

2934

use_dbus=use_dbus,

2935

socketfd=socketfd)

2936

if not foreground:

2937

pidfilename = "/run/mandos.pid"

2938

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

2939

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

2940

pidfile = None

1813

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

1814

server_settings["port"]),

1815

ClientHandler,

1816

interface=(server_settings["interface"]

1817

or None),

1818

use_ipv6=use_ipv6,

1819

gnutls_priority=

1820

server_settings["priority"],

1821

use_dbus=use_dbus)

1822

if not debug:

1823

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

2941

1824

try:

2942

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

2943

except IOError as e:

2944

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

2945

exc_info=e)

1825

pidfile = open(pidfilename, "w")

1826

except IOError:

1827

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

2946

1828

2947

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

2948

("mandos", "mandos"),

2949

("nobody", "nogroup")):

1829

try:

1830

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

1831

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

1832

except KeyError:

2950

1833

try:

2951

uid = pwd.getpwnam(name).pw_uid

2952

gid = pwd.getpwnam(group).pw_gid

2953

break

1834

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

1835

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

2954

1836

except KeyError:

2955

continue

2956

else:

2957

uid = 65534

2958

gid = 65534

1837

try:

1838

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

1839

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

1840

except KeyError:

1841

uid = 65534

1842

gid = 65534

2959

1843

try:

2960

1844

os.setgid(gid)

2961

1845

os.setuid(uid)

2962

if debug:

2963

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

2964

gid))

2965

1846

except OSError as error:

2966

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

2967

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

2968

if error.errno != errno.EPERM:

2969

raise

1847

if error[0] != errno.EPERM:

1848

raise error

2970

1849

1850

if not debug and not debuglevel:

1851

syslogger.setLevel(logging.WARNING)

1852

console.setLevel(logging.WARNING)

1853

if debuglevel:

1854

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

1855

syslogger.setLevel(level)

1856

console.setLevel(level)

1857

2971

1858

if debug:

2972

1859

# Enable all possible GnuTLS debugging

2973

1860

2974

1861

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

2975

1862

# - GnuTLS manual

2976

gnutls.global_set_log_level(11)

1863

gnutls.library.functions.gnutls_global_set_log_level(11)

2977

1864

2978

@gnutls.log_func

1865

@gnutls.library.types.gnutls_log_func

2979

1866

def debug_gnutls(level, string):

2980

1867

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

2981

1868

2982

gnutls.global_set_log_function(debug_gnutls)

1869

(gnutls.library.functions

1870

.gnutls_global_set_log_function(debug_gnutls))

2983

1871

2984

1872

# Redirect stdin so all checkers get /dev/null

2985

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

1873

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

2986

1874

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

2987

1875

if null > 2:

2988

1876

os.close(null)

1877

else:

1878

# No console logging

1879

logger.removeHandler(console)

2989

1880

2990

1881

# Need to fork before connecting to D-Bus

2991

if not foreground:

1882

if not debug:

2992

1883

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

2993

1884

daemon()

2994

1885

2995

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

2996

# to inform GLib that threads will be used.

2997

GLib.threads_init()

2998

2999

1886

global main_loop

3000

1887

# From the Avahi example code

3001

DBusGMainLoop(set_as_default=True)

3002

main_loop = GLib.MainLoop()

1888

DBusGMainLoop(set_as_default=True )

1889

main_loop = gobject.MainLoop()

3003

1890

bus = dbus.SystemBus()

3004

1891

# End of Avahi example code

3005

1892

if use_dbus:

3006

1893

try:

3007

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

3008

bus,

3009

do_not_queue=True)

3010

old_bus_name = dbus.service.BusName(

3011

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

3012

do_not_queue=True)

3013

except dbus.exceptions.DBusException as e:

3014

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

1894

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

1895

bus, do_not_queue=True)

1896

except dbus.exceptions.NameExistsException as e:

1897

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

3015

1898

use_dbus = False

3016

1899

server_settings["use_dbus"] = False

3017

1900

tcp_server.use_dbus = False

3018

if zeroconf:

3019

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3020

service = AvahiServiceToSyslog(

3021

name = server_settings["servicename"],

3022

servicetype = "_mandos._tcp",

3023

protocol = protocol,

3024

bus = bus)

3025

if server_settings["interface"]:

3026

service.interface = if_nametoindex(

3027

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

1901

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1902

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

1903

servicetype = "_mandos._tcp",

1904

protocol = protocol, bus = bus)

1905

if server_settings["interface"]:

1906

service.interface = (if_nametoindex

1907

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

3028

1908

3029

1909

global multiprocessing_manager

3030

1910

multiprocessing_manager = multiprocessing.Manager()

3032

1912

client_class = Client

3033

1913

if use_dbus:

3034

1914

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

3035

3036

client_settings = Client.config_parser(client_config)

3037

old_client_settings = {}

3038

clients_data = {}

3039

3040

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

3041

global wnull

3042

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

3043

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

3044

# mode

3045

if debug or not foreground:

3046

wnull.close()

3047

3048

# Get client data and settings from last running state.

3049

if server_settings["restore"]:

3050

try:

3051

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

3052

if sys.version_info.major == 2:

3053

clients_data, old_client_settings = pickle.load(

3054

stored_state)

3055

else:

3056

bytes_clients_data, bytes_old_client_settings = (

3057

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

3058

### Fix bytes to strings

3059

## clients_data

3060

# .keys()

3061

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

3062

if isinstance(key, bytes)

3063

else key): value

3064

for key, value in

3065

bytes_clients_data.items() }

3066

del bytes_clients_data

3067

for key in clients_data:

3068

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

3069

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

3070

for k, v in

3071

clients_data[key].items() }

3072

clients_data[key] = value

3073

# .client_structure

3074

value["client_structure"] = [

3075

(s.decode("utf-8")

3076

if isinstance(s, bytes)

3077

else s) for s in

3078

value["client_structure"] ]

3079

# .name & .host

3080

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

3081

if isinstance(value[k], bytes):

3082

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

3083

## old_client_settings

3084

# .keys()

3085

old_client_settings = {

3086

(key.decode("utf-8")

3087

if isinstance(key, bytes)

3088

else key): value

3089

for key, value in

3090

bytes_old_client_settings.items() }

3091

del bytes_old_client_settings

3092

# .host

3093

for value in old_client_settings.values():

3094

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

3095

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

3096

.decode("utf-8"))

3097

os.remove(stored_state_path)

3098

except IOError as e:

3099

if e.errno == errno.ENOENT:

3100

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

3101

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

3102

else:

3103

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

3104

exc_info=e)

3105

raise

3106

except EOFError as e:

3107

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

3108

"EOFError:",

3109

exc_info=e)

3110

3111

with PGPEngine() as pgp:

3112

for client_name, client in clients_data.items():

3113

# Skip removed clients

3114

if client_name not in client_settings:

3115

continue

3116

3117

# Decide which value to use after restoring saved state.

3118

# We have three different values: Old config file,

3119

# new config file, and saved state.

3120

# New config value takes precedence if it differs from old

3121

# config value, otherwise use saved state.

3122

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

3123

try:

3124

# For each value in new config, check if it

3125

# differs from the old config value (Except for

3126

# the "secret" attribute)

3127

if (name != "secret"

3128

and (value !=

3129

old_client_settings[client_name][name])):

3130

client[name] = value

3131

except KeyError:

3132

pass

3133

3134

# Clients who has passed its expire date can still be

3135

# enabled if its last checker was successful. A Client

3136

# whose checker succeeded before we stored its state is

3137

# assumed to have successfully run all checkers during

3138

# downtime.

3139

if client["enabled"]:

3140

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

3141

if not client["last_checked_ok"]:

3142

logger.warning(

3143

"disabling client {} - Client never "

3144

"performed a successful checker".format(

3145

client_name))

3146

client["enabled"] = False

3147

elif client["last_checker_status"] != 0:

3148

logger.warning(

3149

"disabling client {} - Client last"

3150

" checker failed with error code"

3151

" {}".format(

3152

client_name,

3153

client["last_checker_status"]))

3154

client["enabled"] = False

3155

else:

3156

client["expires"] = (

3157

datetime.datetime.utcnow()

3158

+ client["timeout"])

3159

logger.debug("Last checker succeeded,"

3160

" keeping {} enabled".format(

3161

client_name))

1915

def client_config_items(config, section):

1916

special_settings = {

1917

"approved_by_default":

1918

lambda: config.getboolean(section,

1919

"approved_by_default"),

1920

}

1921

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

3162

1922

try:

3163

client["secret"] = pgp.decrypt(

3164

client["encrypted_secret"],

3165

client_settings[client_name]["secret"])

3166

except PGPError:

3167

# If decryption fails, we use secret from new settings

3168

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

3169

client_name))

3170

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

3171

["secret"])

3172

3173

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

3174

for client_name in (set(old_client_settings)

3175

- set(client_settings)):

3176

del clients_data[client_name]

3177

for client_name in (set(client_settings)

3178

- set(old_client_settings)):

3179

clients_data[client_name] = client_settings[client_name]

3180

3181

# Create all client objects

3182

for client_name, client in clients_data.items():

3183

tcp_server.clients[client_name] = client_class(

3184

name = client_name,

3185

settings = client,

3186

server_settings = server_settings)

3187

1923

yield (name, special_settings[name]())

1924

except KeyError:

1925

yield (name, value)

1926

1927

tcp_server.clients.update(set(

1928

client_class(name = section,

1929

config= dict(client_config_items(

1930

client_config, section)))

1931

for section in client_config.sections()))

3188

1932

if not tcp_server.clients:

3189

1933

logger.warning("No clients defined")

3190

3191

if not foreground:

3192

if pidfile is not None:

3193

pid = os.getpid()

3194

try:

3195

with pidfile:

3196

print(pid, file=pidfile)

3197

except IOError:

3198

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

3199

pidfilename, pid)

3200

del pidfile

1934

1935

if not debug:

1936

try:

1937

with pidfile:

1938

pid = os.getpid()

1939

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

1940

del pidfile

1941

except IOError:

1942

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

1943

pidfilename, pid)

1944

except NameError:

1945

# "pidfile" was never created

1946

pass

3201

1947

del pidfilename

3202

3203

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

3204

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3205

lambda: main_loop.quit() and False)

1948

1949

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

1950

1951

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

1952

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

3206

1953

3207

1954

if use_dbus:

3208

3209

@alternate_dbus_interfaces(

3210

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

3211

class MandosDBusService(DBusObjectWithObjectManager):

1955

class MandosDBusService(dbus.service.Object):

3212

1956

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

3213

3214

1957

def __init__(self):

3215

1958

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

3216

3217

_interface = "se.recompile.Mandos"

1959

_interface = "se.bsnet.fukt.Mandos"

3218

1960

3219

1961

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

3220

1962

def ClientAdded(self, objpath):

3226

1968

"D-Bus signal"

3227

1969

pass

3228

1970

3229

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

3230

"true"})

3231

1971

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

3232

1972

def ClientRemoved(self, objpath, name):

3233

1973

"D-Bus signal"

3234

1974

pass

3235

1975

3236

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

3237

"true"})

3238

1976

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

3239

1977

def GetAllClients(self):

3240

1978

"D-Bus method"

3241

return dbus.Array(c.dbus_object_path for c in

3242

tcp_server.clients.values())

1979

return dbus.Array(c.dbus_object_path

1980

for c in tcp_server.clients)

3243

1981

3244

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

3245

"true"})

3246

1982

@dbus.service.method(_interface,

3247

1983

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

3248

1984

def GetAllClientsWithProperties(self):

3249

1985

"D-Bus method"

3250

1986

return dbus.Dictionary(

3251

{ c.dbus_object_path: c.GetAll(

3252

"se.recompile.Mandos.Client")

3253

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

1987

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

1988

for c in tcp_server.clients),

3254

1989

signature="oa{sv}")

3255

1990

3256

1991

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

3257

1992

def RemoveClient(self, object_path):

3258

1993

"D-Bus method"

3259

for c in tcp_server.clients.values():

1994

for c in tcp_server.clients:

3260

1995

if c.dbus_object_path == object_path:

3261

del tcp_server.clients[c.name]

1996

tcp_server.clients.remove(c)

3262

1997

c.remove_from_connection()

3263

# Don't signal the disabling

1998

# Don't signal anything except ClientRemoved

3264

1999

c.disable(quiet=True)

3265

# Emit D-Bus signal for removal

3266

self.client_removed_signal(c)

2000

# Emit D-Bus signal

2001

self.ClientRemoved(object_path, c.name)

3267

2002

return

3268

2003

raise KeyError(object_path)

3269

2004

3270

2005

del _interface

3271

3272

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3273

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

3274

def GetManagedObjects(self):

3275

"""D-Bus method"""

3276

return dbus.Dictionary(

3277

{ client.dbus_object_path:

3278

dbus.Dictionary(

3279

{ interface: client.GetAll(interface)

3280

for interface in

3281

client._get_all_interface_names()})

3282

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

3283

3284

def client_added_signal(self, client):

3285

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

3286

if use_dbus:

3287

# New standard signal

3288

self.InterfacesAdded(

3289

client.dbus_object_path,

3290

dbus.Dictionary(

3291

{ interface: client.GetAll(interface)

3292

for interface in

3293

client._get_all_interface_names()}))

3294

# Old signal

3295

self.ClientAdded(client.dbus_object_path)

3296

3297

def client_removed_signal(self, client):

3298

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

3299

if use_dbus:

3300

# New standard signal

3301

self.InterfacesRemoved(

3302

client.dbus_object_path,

3303

client._get_all_interface_names())

3304

# Old signal

3305

self.ClientRemoved(client.dbus_object_path,

3306

client.name)

3307

2006

3308

2007

mandos_dbus_service = MandosDBusService()

3309

2008

3310

2009

def cleanup():

3311

2010

"Cleanup function; run on exit"

3312

if zeroconf:

3313

service.cleanup()

3314

3315

multiprocessing.active_children()

3316

wnull.close()

3317

if not (tcp_server.clients or client_settings):

3318

return

3319

3320

# Store client before exiting. Secrets are encrypted with key

3321

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

3322

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

3323

clients = {}

3324

with PGPEngine() as pgp:

3325

for client in tcp_server.clients.values():

3326

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

3327

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

3328

key)

3329

client_dict = {}

3330

3331

# A list of attributes that can not be pickled

3332

# + secret.

3333

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

3334

"checker", "server_settings" }

3335

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

3336

.Object):

3337

exclude.add(name)

3338

3339

client_dict["encrypted_secret"] = (client

3340

.encrypted_secret)

3341

for attr in client.client_structure:

3342

if attr not in exclude:

3343

client_dict[attr] = getattr(client, attr)

3344

3345

clients[client.name] = client_dict

3346

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

3347

3348

try:

3349

with tempfile.NamedTemporaryFile(

3350

mode='wb',

3351

suffix=".pickle",

3352

prefix='clients-',

3353

dir=os.path.dirname(stored_state_path),

3354

delete=False) as stored_state:

3355

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

3356

protocol = 2)

3357

tempname = stored_state.name

3358

os.rename(tempname, stored_state_path)

3359

except (IOError, OSError) as e:

3360

if not debug:

3361

try:

3362

os.remove(tempname)

3363

except NameError:

3364

pass

3365

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

3366

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

3367

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

3368

else:

3369

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

3370

exc_info=e)

3371

raise

3372

3373

# Delete all clients, and settings from config

2011

service.cleanup()

2012

3374

2013

while tcp_server.clients:

3375

name, client = tcp_server.clients.popitem()

2014

client = tcp_server.clients.pop()

3376

2015

if use_dbus:

3377

2016

client.remove_from_connection()

3378

# Don't signal the disabling

2017

client.disable_hook = None

2018

# Don't signal anything except ClientRemoved

3379

2019

client.disable(quiet=True)

3380

# Emit D-Bus signal for removal

3381

2020

if use_dbus:

3382

mandos_dbus_service.client_removed_signal(client)

3383

client_settings.clear()

2021

# Emit D-Bus signal

2022

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2023

client.name)

3384

2024

3385

2025

atexit.register(cleanup)

3386

2026

3387

for client in tcp_server.clients.values():

2027

for client in tcp_server.clients:

3388

2028

if use_dbus:

3389

# Emit D-Bus signal for adding

3390

mandos_dbus_service.client_added_signal(client)

3391

# Need to initiate checking of clients

3392

if client.enabled:

3393

client.init_checker()

2029

# Emit D-Bus signal

2030

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2031

client.enable()

3394

2032

3395

2033

tcp_server.enable()

3396

2034

tcp_server.server_activate()

3397

2035

3398

2036

# Find out what port we got

3399

if zeroconf:

3400

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

2037

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

3401

2038

if use_ipv6:

3402

2039

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

3403

" flowinfo %d, scope_id %d",

3404

*tcp_server.socket.getsockname())

2040

" flowinfo %d, scope_id %d"

2041

% tcp_server.socket.getsockname())

3405

2042

else: # IPv4

3406

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

3407

*tcp_server.socket.getsockname())

2043

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

2044

% tcp_server.socket.getsockname())

3408

2045

3409

2046

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

3410

2047

3411

2048

try:

3412

if zeroconf:

3413

# From the Avahi example code

3414

try:

3415

service.activate()

3416

except dbus.exceptions.DBusException as error:

3417

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

3418

cleanup()

3419

sys.exit(1)

3420

# End of Avahi example code

2049

# From the Avahi example code

2050

try:

2051

service.activate()

2052

except dbus.exceptions.DBusException as error:

2053

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

2054

cleanup()

2055

sys.exit(1)

2056

# End of Avahi example code

3421

2057

3422

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

3423

lambda *args, **kwargs:

3424

(tcp_server.handle_request

3425

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

2058

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

2059

lambda *args, **kwargs:

2060

(tcp_server.handle_request

2061

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

3426

2062

3427

2063

logger.debug("Starting main loop")

3428

2064

main_loop.run()

3429

2065

except AvahiError as error:

3430

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

2066

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

3431

2067

cleanup()

3432

2068

sys.exit(1)

3433

2069

except KeyboardInterrupt:

3438

2074

# Must run before the D-Bus bus name gets deregistered

3439

2075

cleanup()

3440

2076

3441

3442

2077

if __name__ == '__main__':

3443

2078

main()