/mandos/trunk : revision 830

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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@fukt.bsnet.se>.

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# Contact the authors at <mandos@recompile.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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import SocketServer as socketserver

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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 socket

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import argparse

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import datetime

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import errno

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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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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 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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import cPickle as pickle

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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 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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import gobject

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import avahi

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from gi.repository import GLib

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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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version = "1.3.1"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.5"

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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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class AvahiError(Exception):

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

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self.value = value

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

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**kwargs)

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

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

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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, 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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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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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):

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def rename(self, remove=True):

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

157

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

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

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self.name)

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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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if remove:

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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:

173

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

174

self.cleanup()

175

os._exit(1)

176

self.rename_count += 1

360

if (error.get_dbus_name()

361

== "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()

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os._exit(1)

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def remove(self):

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

179

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if self.entry_group_state_changed_match is not None:

181

373

self.entry_group_state_changed_match = None

182

374

if self.group is not None:

183

375

self.group.Reset()

376

184

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def add(self):

185

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

186

379

self.remove()

191

384

avahi.DBUS_INTERFACE_ENTRY_GROUP)

192

385

self.entry_group_state_changed_match = (

193

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self.group.connect_to_signal(

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'StateChanged', self .entry_group_state_changed))

387

'StateChanged', self.entry_group_state_changed))

195

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

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self.name, self.type)

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390

self.group.AddService(

203

396

dbus.UInt16(self.port),

204

397

avahi.string_array_to_txt_array(self.TXT))

205

398

self.group.Commit()

399

206

400

def entry_group_state_changed(self, state, error):

207

401

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

208

402

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

214

408

self.rename()

215

409

elif state == avahi.ENTRY_GROUP_FAILURE:

216

410

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

217

unicode(error))

218

raise AvahiGroupError("State changed: %s"

219

% unicode(error))

411

str(error))

412

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

413

220

414

def cleanup(self):

221

415

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

222

416

if self.group is not None:

223

417

try:

224

418

self.group.Free()

225

419

except (dbus.exceptions.UnknownMethodException,

226

dbus.exceptions.DBusException) as e:

420

dbus.exceptions.DBusException):

227

421

pass

228

422

self.group = None

229

423

self.remove()

424

230

425

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

231

426

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

232

427

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

233

bad_states = { avahi.SERVER_INVALID:

234

"Zeroconf server invalid",

235

avahi.SERVER_REGISTERING: None,

236

avahi.SERVER_COLLISION:

237

"Zeroconf server name collision",

238

avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

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

}

240

434

if state in bad_states:

241

435

if bad_states[state] is not None:

242

436

if error is None:

245

439

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

246

440

self.cleanup()

247

441

elif state == avahi.SERVER_RUNNING:

248

self.add()

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)

249

454

else:

250

455

if error is None:

251

456

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

252

457

else:

253

458

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

459

254

460

def activate(self):

255

461

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

256

462

if self.server is None:

260

466

follow_name_owner_changes=True),

261

467

avahi.DBUS_INTERFACE_SERVER)

262

468

self.server.connect_to_signal("StateChanged",

263

self.server_state_changed)

469

self.server_state_changed)

264

470

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

265

471

266

472

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

267

747

class Client(object):

268

748

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

269

749

270

750

Attributes:

271

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

751

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

272

752

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

273

753

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

274

754

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

275

755

to see if the client lives.

276

756

'None' if no process is running.

277

checker_callback_tag: a gobject event source tag, or None

757

checker_callback_tag: a GLib event source tag, or None

278

758

checker_command: string; External command which is run to check

279

759

if client lives. %() expansions are done at

280

760

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

281

761

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

282

checker_initiator_tag: a gobject event source tag, or None

762

checker_initiator_tag: a GLib event source tag, or None

283

763

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

284

766

current_checker_command: string; current running checker_command

285

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

286

disable_initiator_tag: a gobject event source tag, or None

767

disable_initiator_tag: a GLib event source tag, or None

287

768

enabled: bool()

288

769

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

289

770

uniquely identify the client

291

772

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

292

773

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

293

774

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

294

last_enabled: datetime.datetime(); (UTC)

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

295

781

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

296

782

D-Bus identifiers

297

783

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

298

784

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

299

785

until this client is disabled

786

extended_timeout: extra long timeout when secret has been sent

300

787

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()

301

791

"""

302

792

303

793

runtime_expansions = ("approval_delay", "approval_duration",

304

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

305

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

794

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

795

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

796

"last_approval_request", "last_checked_ok",

306

797

"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

}

307

809

308

810

@staticmethod

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."""

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):

330

863

self.name = name

331

if config is None:

332

config = {}

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

333

881

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(" ", ""))

339

882

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

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

883

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

884

datetime.datetime.utcnow())

885

886

# attributes specific for this server instance

359

887

self.checker = None

360

888

self.checker_initiator_tag = None

361

889

self.disable_initiator_tag = None

362

890

self.checker_callback_tag = None

363

self.checker_command = config["checker"]

364

891

self.current_checker_command = None

365

self.last_connect = None

366

self._approved = None

367

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

368

True)

892

self.approved = None

369

893

self.approvals_pending = 0

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())

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)

375

905

906

# Send notice to process children that client state has changed

376

907

def send_changedstate(self):

377

self.changedstate.acquire()

378

self.changedstate.notify_all()

379

self.changedstate.release()

380

908

with self.changedstate:

909

self.changedstate.notify_all()

910

381

911

def enable(self):

382

912

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

383

913

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

384

914

# Already enabled

385

915

return

386

self.send_changedstate()

916

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

917

self.enabled = True

387

918

self.last_enabled = datetime.datetime.utcnow()

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()

919

self.init_checker()

920

self.send_changedstate()

400

921

401

922

def disable(self, quiet=True):

402

923

"""Disable this client."""

403

924

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

404

925

return False

405

926

if not quiet:

406

self.send_changedstate()

407

if not quiet:

408

927

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

409

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

410

gobject.source_remove(self.disable_initiator_tag)

928

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

929

GLib.source_remove(self.disable_initiator_tag)

411

930

self.disable_initiator_tag = None

412

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

413

gobject.source_remove(self.checker_initiator_tag)

931

self.expires = None

932

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

933

GLib.source_remove(self.checker_initiator_tag)

414

934

self.checker_initiator_tag = None

415

935

self.stop_checker()

416

if self.disable_hook:

417

self.disable_hook(self)

418

936

self.enabled = False

419

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

937

if not quiet:

938

self.send_changedstate()

939

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

420

940

return False

421

941

422

942

def __del__(self):

423

self.disable_hook = None

424

943

self.disable()

425

944

426

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

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):

427

963

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

428

964

self.checker_callback_tag = None

429

965

self.checker = None

430

if os.WIFEXITED(condition):

431

exitstatus = os.WEXITSTATUS(condition)

432

if exitstatus == 0:

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:

433

974

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

434

975

vars(self))

435

976

self.checked_ok()

436

977

else:

437

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

438

vars(self))

978

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

439

979

else:

980

self.last_checker_status = -1

981

self.last_checker_signal = -returncode

440

982

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

441

983

vars(self))

984

return False

442

985

443

986

def checked_ok(self):

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

"""

987

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

449

988

self.last_checked_ok = datetime.datetime.utcnow()

450

gobject.source_remove(self.disable_initiator_tag)

451

self.disable_initiator_tag = (gobject.timeout_add

452

(self.timeout_milliseconds(),

453

self.disable))

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

454

1004

455

1005

def need_approval(self):

456

1006

self.last_approval_request = datetime.datetime.utcnow()

461

1011

If a checker already exists, leave it running and do

462

1012

nothing."""

463

1013

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

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

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

468

1018

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

469

1019

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

470

1020

# should be.

471

1021

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)

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

485

1026

# Start a new checker if needed

486

1027

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 }

487

1032

try:

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

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

506

1039

self.current_checker_command = command

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

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

531

1066

return True

532

1067

533

1068

def stop_checker(self):

534

1069

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

535

1070

if self.checker_callback_tag:

536

gobject.source_remove(self.checker_callback_tag)

1071

GLib.source_remove(self.checker_callback_tag)

537

1072

self.checker_callback_tag = None

538

1073

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

539

1074

return

540

1075

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

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

1076

self.checker.terminate()

549

1077

self.checker = None

550

1078

551

def dbus_service_property(dbus_interface, signature="v",

552

access="readwrite", byte_arrays=False):

1079

1080

def dbus_service_property(dbus_interface,

1081

signature="v",

1082

access="readwrite",

1083

byte_arrays=False):

553

1084

"""Decorators for marking methods of a DBusObjectWithProperties to

554

1085

become properties on the D-Bus.

555

1086

564

1095

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

565

1096

if byte_arrays and signature != "ay":

566

1097

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

567

" signature %r" % signature)

1098

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

1099

568

1100

def decorator(func):

569

1101

func._dbus_is_property = True

570

1102

func._dbus_interface = dbus_interface

575

1107

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

576

1108

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

577

1109

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

578

1154

return decorator

579

1155

580

1156

581

1157

class DBusPropertyException(dbus.exceptions.DBusException):

582

1158

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

583

1159

"""

584

def __unicode__(self):

585

return unicode(str(self))

1160

pass

586

1161

587

1162

588

1163

class DBusPropertyAccessException(DBusPropertyException):

597

1172

pass

598

1173

599

1174

600

class DBusObjectWithProperties(dbus.service.Object):

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):

601

1265

"""A D-Bus object with properties.

602

1266

603

1267

Classes inheriting from this can use the dbus_service_property

604

1268

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

605

1269

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

606

1270

"""

607

1271

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

619

1272

def _get_dbus_property(self, interface_name, property_name):

620

1273

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

621

1274

property with the specified name and interface.

622

1275

"""

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

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

633

1283

# No such property

634

raise DBusPropertyNotFound(self.dbus_object_path + ":"

635

+ interface_name + "."

636

+ property_name)

637

638

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

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",

639

1298

out_signature="v")

640

1299

def Get(self, interface_name, property_name):

641

1300

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

659

1318

# The byte_arrays option is not supported yet on

660

1319

# signatures other than "ay".

661

1320

if prop._dbus_signature != "ay":

662

raise ValueError

663

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

664

for byte in value))

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))

665

1326

prop(value)

666

1327

667

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

1328

@dbus.service.method(dbus.PROPERTIES_IFACE,

1329

in_signature="s",

668

1330

out_signature="a{sv}")

669

1331

def GetAll(self, interface_name):

670

1332

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

671

1333

standard.

672

1334

673

1335

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

674

1336

"""

675

all = {}

676

for name, prop in self._get_all_dbus_properties():

1337

properties = {}

1338

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

677

1339

if (interface_name

678

1340

and interface_name != prop._dbus_interface):

679

1341

# Interface non-empty but did not match

683

1345

continue

684

1346

value = prop()

685

1347

if not hasattr(value, "variant_level"):

686

all[name] = value

1348

properties[name] = value

687

1349

continue

688

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

689

value.variant_level+1)

690

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

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

691

1361

692

1362

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

693

1363

out_signature="s",

694

1364

path_keyword='object_path',

695

1365

connection_keyword='connection')

696

1366

def Introspect(self, object_path, connection):

697

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

1367

"""Overloading of standard D-Bus method.

1368

1369

Inserts property tags and interface annotation tags.

698

1370

"""

699

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

700

connection)

1371

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1372

object_path,

1373

connection)

701

1374

try:

702

1375

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

1376

703

1377

def make_tag(document, name, prop):

704

1378

e = document.createElement("property")

705

1379

e.setAttribute("name", name)

706

1380

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

707

1381

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

708

1382

return e

1383

709

1384

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

1385

# Add property tags

710

1386

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

711

1387

for name, prop

712

in self._get_all_dbus_properties()

1388

in self._get_all_dbus_things("property")

713

1389

if prop._dbus_interface

714

1390

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

715

1391

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)

716

1408

# Add the names to the return values for the

717

1409

# "org.freedesktop.DBus.Properties" methods

718

1410

if (if_tag.getAttribute("name")

733

1425

except (AttributeError, xml.dom.DOMException,

734

1426

xml.parsers.expat.ExpatError) as error:

735

1427

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

736

error)

737

return xmlstring

738

739

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"})

740

1676

class ClientDBus(Client, DBusObjectWithProperties):

741

1677

"""A Client class using D-Bus

742

1678

746

1682

"""

747

1683

748

1684

runtime_expansions = (Client.runtime_expansions

749

+ ("dbus_object_path",))

1685

+ ("dbus_object_path", ))

1686

1687

_interface = "se.recompile.Mandos.Client"

750

1688

751

1689

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

752

1690

753

1691

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

754

self._approvals_pending = 0

755

1692

self.bus = bus

756

1693

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

757

1694

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

758

1695

# the D-Bus

759

client_object_name = unicode(self.name).translate(

1696

client_object_name = str(self.name).translate(

760

1697

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

761

1698

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

762

self.dbus_object_path = (dbus.ObjectPath

763

("/clients/" + client_object_name))

1699

self.dbus_object_path = dbus.ObjectPath(

1700

"/clients/" + client_object_name)

764

1701

DBusObjectWithProperties.__init__(self, self.bus,

765

1702

self.dbus_object_path)

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

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

810

1784

811

1785

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

812

1786

try:

817

1791

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

818

1792

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

819

1793

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)

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:

829

1801

# Emit D-Bus signal

830

1802

self.CheckerCompleted(dbus.Int16(exitstatus),

831

dbus.Int64(condition),

1803

# This is specific to GNU libC

1804

dbus.Int64(exitstatus << 8),

832

1805

dbus.String(command))

833

1806

else:

834

1807

# Emit D-Bus signal

835

1808

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

836

dbus.Int64(condition),

1809

dbus.Int64(

1810

# This is specific to GNU libC

1811

(exitstatus << 8)

1812

| self.last_checker_signal),

837

1813

dbus.String(command))

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

1814

return ret

858

1815

859

1816

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

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

1817

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

865

1818

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

866

1819

# Only if new checker process was started

867

1820

if (self.checker is not None

868

1821

and old_checker_pid != self.checker.pid):

869

1822

# Emit D-Bus signal

870

1823

self.CheckerStarted(self.current_checker_command)

871

self.PropertyChanged(

872

dbus.String("CheckerRunning"),

873

dbus.Boolean(True, variant_level=1))

874

1824

return r

875

1825

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

885

1826

def _reset_approved(self):

886

self._approved = None

1827

self.approved = None

887

1828

return False

888

1829

889

1830

def approve(self, value=True):

1831

self.approved = value

1832

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

1833

* 1000), self._reset_approved)

890

1834

self.send_changedstate()

891

self._approved = value

892

gobject.timeout_add(self._timedelta_to_milliseconds

893

(self.approval_duration),

894

self._reset_approved)

895

896

1835

897

1836

## D-Bus methods, signals & properties

898

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

1837

1838

## Interfaces

899

1839

900

1840

## Signals

901

1841

912

1852

pass

913

1853

914

1854

# PropertyChanged - signal

1855

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

915

1856

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

916

1857

def PropertyChanged(self, property, value):

917

1858

"D-Bus signal"

951

1892

self.checked_ok()

952

1893

953

1894

# Enable - method

1895

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

954

1896

@dbus.service.method(_interface)

955

1897

def Enable(self):

956

1898

"D-Bus method"

957

1899

self.enable()

958

1900

959

1901

# StartChecker - method

1902

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

960

1903

@dbus.service.method(_interface)

961

1904

def StartChecker(self):

962

1905

"D-Bus method"

963

1906

self.start_checker()

964

1907

965

1908

# Disable - method

1909

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

966

1910

@dbus.service.method(_interface)

967

1911

def Disable(self):

968

1912

"D-Bus method"

969

1913

self.disable()

970

1914

971

1915

# StopChecker - method

1916

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

972

1917

@dbus.service.method(_interface)

973

1918

def StopChecker(self):

974

1919

self.stop_checker()

981

1926

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

982

1927

983

1928

# ApprovedByDefault - property

984

@dbus_service_property(_interface, signature="b",

1929

@dbus_service_property(_interface,

1930

signature="b",

985

1931

access="readwrite")

986

1932

def ApprovedByDefault_dbus_property(self, value=None):

987

1933

if value is None: # get

988

1934

return dbus.Boolean(self.approved_by_default)

989

1935

self.approved_by_default = bool(value)

990

# Emit D-Bus signal

991

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

992

dbus.Boolean(value, variant_level=1))

993

1936

994

1937

# ApprovalDelay - property

995

@dbus_service_property(_interface, signature="t",

1938

@dbus_service_property(_interface,

1939

signature="t",

996

1940

access="readwrite")

997

1941

def ApprovalDelay_dbus_property(self, value=None):

998

1942

if value is None: # get

999

return dbus.UInt64(self.approval_delay_milliseconds())

1943

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

1944

* 1000)

1000

1945

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))

1004

1946

1005

1947

# ApprovalDuration - property

1006

@dbus_service_property(_interface, signature="t",

1948

@dbus_service_property(_interface,

1949

signature="t",

1007

1950

access="readwrite")

1008

1951

def ApprovalDuration_dbus_property(self, value=None):

1009

1952

if value is None: # get

1010

return dbus.UInt64(self._timedelta_to_milliseconds(

1011

self.approval_duration))

1953

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

1954

* 1000)

1012

1955

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))

1016

1956

1017

1957

# Name - property

1958

@dbus_annotations(

1959

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

1018

1960

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

1019

1961

def Name_dbus_property(self):

1020

1962

return dbus.String(self.name)

1021

1963

1022

1964

# Fingerprint - property

1965

@dbus_annotations(

1966

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

1023

1967

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

1024

1968

def Fingerprint_dbus_property(self):

1025

1969

return dbus.String(self.fingerprint)

1026

1970

1027

1971

# Host - property

1028

@dbus_service_property(_interface, signature="s",

1972

@dbus_service_property(_interface,

1973

signature="s",

1029

1974

access="readwrite")

1030

1975

def Host_dbus_property(self, value=None):

1031

1976

if value is None: # get

1032

1977

return dbus.String(self.host)

1033

self.host = value

1034

# Emit D-Bus signal

1035

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

1036

dbus.String(value, variant_level=1))

1978

self.host = str(value)

1037

1979

1038

1980

# Created - property

1981

@dbus_annotations(

1982

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

1039

1983

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

1040

1984

def Created_dbus_property(self):

1041

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

1985

return datetime_to_dbus(self.created)

1042

1986

1043

1987

# LastEnabled - property

1044

1988

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

1045

1989

def LastEnabled_dbus_property(self):

1046

if self.last_enabled is None:

1047

return dbus.String("")

1048

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

1990

return datetime_to_dbus(self.last_enabled)

1049

1991

1050

1992

# Enabled - property

1051

@dbus_service_property(_interface, signature="b",

1993

@dbus_service_property(_interface,

1994

signature="b",

1052

1995

access="readwrite")

1053

1996

def Enabled_dbus_property(self, value=None):

1054

1997

if value is None: # get

1059

2002

self.disable()

1060

2003

1061

2004

# LastCheckedOK - property

1062

@dbus_service_property(_interface, signature="s",

2005

@dbus_service_property(_interface,

2006

signature="s",

1063

2007

access="readwrite")

1064

2008

def LastCheckedOK_dbus_property(self, value=None):

1065

2009

if value is not None:

1066

2010

self.checked_ok()

1067

2011

return

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))

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)

1072

2023

1073

2024

# LastApprovalRequest - property

1074

2025

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

1075

2026

def LastApprovalRequest_dbus_property(self):

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))

2027

return datetime_to_dbus(self.last_approval_request)

1081

2028

1082

2029

# Timeout - property

1083

@dbus_service_property(_interface, signature="t",

2030

@dbus_service_property(_interface,

2031

signature="t",

1084

2032

access="readwrite")

1085

2033

def Timeout_dbus_property(self, value=None):

1086

2034

if value is None: # get

1087

return dbus.UInt64(self.timeout_milliseconds())

2035

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

2036

old_timeout = self.timeout

1088

2037

self.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))

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)

1109

2063

1110

2064

# Interval - property

1111

@dbus_service_property(_interface, signature="t",

2065

@dbus_service_property(_interface,

2066

signature="t",

1112

2067

access="readwrite")

1113

2068

def Interval_dbus_property(self, value=None):

1114

2069

if value is None: # get

1115

return dbus.UInt64(self.interval_milliseconds())

2070

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

1116

2071

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))

1120

2072

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

1121

2073

return

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

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

1128

2081

# Checker - property

1129

@dbus_service_property(_interface, signature="s",

2082

@dbus_service_property(_interface,

2083

signature="s",

1130

2084

access="readwrite")

1131

2085

def Checker_dbus_property(self, value=None):

1132

2086

if value is None: # get

1133

2087

return dbus.String(self.checker_command)

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))

2088

self.checker_command = str(value)

1139

2089

1140

2090

# CheckerRunning - property

1141

@dbus_service_property(_interface, signature="b",

2091

@dbus_service_property(_interface,

2092

signature="b",

1142

2093

access="readwrite")

1143

2094

def CheckerRunning_dbus_property(self, value=None):

1144

2095

if value is None: # get

1149

2100

self.stop_checker()

1150

2101

1151

2102

# ObjectPath - property

2103

@dbus_annotations(

2104

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

2105

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

1152

2106

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

1153

2107

def ObjectPath_dbus_property(self):

1154

2108

return self.dbus_object_path # is already a dbus.ObjectPath

1155

2109

1156

2110

# Secret = property

1157

@dbus_service_property(_interface, signature="ay",

1158

access="write", byte_arrays=True)

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)

1159

2118

def Secret_dbus_property(self, value):

1160

self.secret = str(value)

2119

self.secret = bytes(value)

1161

2120

1162

2121

del _interface

1163

2122

1167

2126

self._pipe = child_pipe

1168

2127

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

1169

2128

if not self._pipe.recv():

1170

raise KeyError()

1171

2129

raise KeyError(fpr)

2130

1172

2131

def __getattribute__(self, name):

1173

if(name == '_pipe'):

2132

if name == '_pipe':

1174

2133

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

1175

2134

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

1176

2135

data = self._pipe.recv()

1177

2136

if data[0] == 'data':

1178

2137

return data[1]

1179

2138

if data[0] == 'function':

2139

1180

2140

def func(*args, **kwargs):

1181

2141

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

1182

2142

return self._pipe.recv()[1]

2143

1183

2144

return func

1184

2145

1185

2146

def __setattr__(self, name, value):

1186

if(name == '_pipe'):

2147

if name == '_pipe':

1187

2148

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

1188

2149

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

1189

2150

1197

2158

def handle(self):

1198

2159

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

1199

2160

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

1200

unicode(self.client_address))

2161

str(self.client_address))

1201

2162

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

1202

2163

self.server.child_pipe.fileno())

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

2164

2165

session = gnutls.ClientSession(self.request)

2166

1214

2167

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

1215

2168

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

1216

2169

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

1219

2172

priority = self.server.gnutls_priority

1220

2173

if priority is None:

1221

2174

priority = "NORMAL"

1222

(gnutls.library.functions

1223

.gnutls_priority_set_direct(session._c_object,

1224

priority, None))

1225

2175

gnutls.priority_set_direct(session._c_object, priority,

2176

None)

2177

1226

2178

# Start communication using the Mandos protocol

1227

2179

# Get protocol number

1228

2180

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

1229

2181

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

1230

2182

try:

1231

2183

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

1232

raise RuntimeError

2184

raise RuntimeError(line)

1233

2185

except (ValueError, IndexError, RuntimeError) as error:

1234

2186

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

1235

2187

return

1236

2188

1237

2189

# Start GnuTLS connection

1238

2190

try:

1239

2191

session.handshake()

1240

except gnutls.errors.GNUTLSError as error:

2192

except gnutls.Error as error:

1241

2193

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

1242

2194

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

1243

2195

# established. Just abandon the request.

1244

2196

return

1245

2197

logger.debug("Handshake succeeded")

1246

2198

1247

2199

approval_required = False

1248

2200

try:

1249

2201

try:

1250

fpr = self.fingerprint(self.peer_certificate

1251

(session))

1252

except (TypeError,

1253

gnutls.errors.GNUTLSError) as error:

2202

fpr = self.fingerprint(

2203

self.peer_certificate(session))

2204

except (TypeError, gnutls.Error) as error:

1254

2205

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

1255

2206

return

1256

2207

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

1257

2208

1258

2209

try:

1259

2210

client = ProxyClient(child_pipe, fpr,

1260

2211

self.client_address)

1269

2220

while True:

1270

2221

if not client.enabled:

1271

2222

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

1272

client.name)

2223

client.name)

1273

2224

if self.server.use_dbus:

1274

2225

# Emit D-Bus signal

1275

client.Rejected("Disabled")

2226

client.Rejected("Disabled")

1276

2227

return

1277

2228

1278

if client._approved or not client.approval_delay:

2229

if client.approved or not client.approval_delay:

1279

2230

#We are approved or approval is disabled

1280

2231

break

1281

elif client._approved is None:

2232

elif client.approved is None:

1282

2233

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

1283

2234

client.name)

1284

2235

if self.server.use_dbus:

1285

2236

# Emit D-Bus signal

1286

2237

client.NeedApproval(

1287

client.approval_delay_milliseconds(),

1288

client.approved_by_default)

2238

client.approval_delay.total_seconds()

2239

* 1000, client.approved_by_default)

1289

2240

else:

1290

2241

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

1291

2242

client.name)

1295

2246

return

1296

2247

1297

2248

#wait until timeout or approved

1298

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

1299

2249

time = datetime.datetime.now()

1300

2250

client.changedstate.acquire()

1301

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

2251

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

1302

2252

client.changedstate.release()

1303

2253

time2 = datetime.datetime.now()

1304

2254

if (time2 - time) >= delay:

1315

2265

else:

1316

2266

delay -= time2 - time

1317

2267

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

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

1330

2275

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

1331

# bump the timeout as if seen

1332

client.checked_ok()

2276

# bump the timeout using extended_timeout

2277

client.bump_timeout(client.extended_timeout)

1333

2278

if self.server.use_dbus:

1334

2279

# Emit D-Bus signal

1335

2280

client.GotSecret()

1339

2284

client.approvals_pending -= 1

1340

2285

try:

1341

2286

session.bye()

1342

except gnutls.errors.GNUTLSError as error:

1343

logger.warning("GnuTLS bye failed")

2287

except gnutls.Error as error:

2288

logger.warning("GnuTLS bye failed",

2289

exc_info=error)

1344

2290

1345

2291

@staticmethod

1346

2292

def peer_certificate(session):

1347

2293

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

1348

2294

# If not an OpenPGP certificate...

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

2295

if (gnutls.certificate_type_get(session._c_object)

2296

!= gnutls.CRT_OPENPGP):

2297

# ...return invalid data

2298

return b""

1354

2299

list_size = ctypes.c_uint(1)

1355

cert_list = (gnutls.library.functions

1356

.gnutls_certificate_get_peers

2300

cert_list = (gnutls.certificate_get_peers

1357

2301

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

1358

2302

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

1359

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

1360

" certificate")

2303

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

1361

2304

if list_size.value == 0:

1362

2305

return None

1363

2306

cert = cert_list[0]

1367

2310

def fingerprint(openpgp):

1368

2311

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1369

2312

# New GnuTLS "datum" with the OpenPGP public key

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))))

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)))

1375

2317

# New empty GnuTLS certificate

1376

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1377

(gnutls.library.functions

1378

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2318

crt = gnutls.openpgp_crt_t()

2319

gnutls.openpgp_crt_init(ctypes.byref(crt))

1379

2320

# Import the OpenPGP public key into the certificate

1380

(gnutls.library.functions

1381

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

1382

gnutls.library.constants

1383

.GNUTLS_OPENPGP_FMT_RAW))

2321

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

2322

gnutls.OPENPGP_FMT_RAW)

1384

2323

# Verify the self signature in the key

1385

2324

crtverify = ctypes.c_uint()

1386

(gnutls.library.functions

1387

.gnutls_openpgp_crt_verify_self(crt, 0,

1388

ctypes.byref(crtverify)))

2325

gnutls.openpgp_crt_verify_self(crt, 0,

2326

ctypes.byref(crtverify))

1389

2327

if crtverify.value != 0:

1390

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1391

raise (gnutls.errors.CertificateSecurityError

1392

("Verify failed"))

2328

gnutls.openpgp_crt_deinit(crt)

2329

raise gnutls.CertificateSecurityError("Verify failed")

1393

2330

# New buffer for the fingerprint

1394

2331

buf = ctypes.create_string_buffer(20)

1395

2332

buf_len = ctypes.c_size_t()

1396

2333

# Get the fingerprint from the certificate into the buffer

1397

(gnutls.library.functions

1398

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

1399

ctypes.byref(buf_len)))

2334

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

2335

ctypes.byref(buf_len))

1400

2336

# Deinit the certificate

1401

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2337

gnutls.openpgp_crt_deinit(crt)

1402

2338

# Convert the buffer to a Python bytestring

1403

2339

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

1404

2340

# Convert the bytestring to hexadecimal notation

1405

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

2341

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

1406

2342

return hex_fpr

1407

2343

1408

2344

1409

2345

class MultiprocessingMixIn(object):

1410

2346

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

2347

1411

2348

def sub_process_main(self, request, address):

1412

2349

try:

1413

2350

self.finish_request(request, address)

1414

except:

2351

except Exception:

1415

2352

self.handle_error(request, address)

1416

2353

self.close_request(request)

1417

2354

1418

2355

def process_request(self, request, address):

1419

2356

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

1420

multiprocessing.Process(target = self.sub_process_main,

1421

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

2357

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

2358

args = (request, address))

2359

proc.start()

2360

return proc

2361

1422

2362

1423

2363

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1424

2364

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

2365

1425

2366

def process_request(self, request, client_address):

1426

2367

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

1427

2368

1428

2369

This function creates a new pipe in self.pipe

1429

2370

"""

1430

2371

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1431

1432

super(MultiprocessingMixInWithPipe,

1433

self).process_request(request, client_address)

2372

2373

proc = MultiprocessingMixIn.process_request(self, request,

2374

client_address)

1434

2375

self.child_pipe.close()

1435

self.add_pipe(parent_pipe)

1436

1437

def add_pipe(self, parent_pipe):

2376

self.add_pipe(parent_pipe, proc)

2377

2378

def add_pipe(self, parent_pipe, proc):

1438

2379

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

1439

raise NotImplementedError

2380

raise NotImplementedError()

2381

1440

2382

1441

2383

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1442

2384

socketserver.TCPServer, object):

1447

2389

interface: None or a network interface name (string)

1448

2390

use_ipv6: Boolean; to use IPv6 or not

1449

2391

"""

2392

1450

2393

def __init__(self, server_address, RequestHandlerClass,

1451

interface=None, use_ipv6=True):

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

"""

1452

2400

self.interface = interface

1453

2401

if use_ipv6:

1454

2402

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.

1455

2429

socketserver.TCPServer.__init__(self, server_address,

1456

2430

RequestHandlerClass)

2431

1457

2432

def server_bind(self):

1458

2433

"""This overrides the normal server_bind() function

1459

2434

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

1465

2440

self.interface)

1466

2441

else:

1467

2442

try:

1468

self.socket.setsockopt(socket.SOL_SOCKET,

1469

SO_BINDTODEVICE,

1470

str(self.interface

1471

+ '\0'))

2443

self.socket.setsockopt(

2444

socket.SOL_SOCKET, SO_BINDTODEVICE,

2445

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

1472

2446

except socket.error as error:

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:

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:

1478

2451

logger.error("SO_BINDTODEVICE not available;"

1479

2452

" cannot bind to interface %s",

1480

2453

self.interface)

2454

elif error.errno == errno.ENODEV:

2455

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

2456

" cannot bind", self.interface)

1481

2457

else:

1482

2458

raise

1483

2459

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

1486

2462

if self.address_family == socket.AF_INET6:

1487

2463

any_address = "::" # in6addr_any

1488

2464

else:

1489

any_address = socket.INADDR_ANY

2465

any_address = "0.0.0.0" # INADDR_ANY

1490

2466

self.server_address = (any_address,

1491

2467

self.server_address[1])

1492

2468

elif not self.server_address[1]:

1493

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

1494

0)

2469

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

1495

2470

# if self.interface:

1496

2471

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

1497

2472

# 0, # port

1509

2484

gnutls_priority GnuTLS priority string

1510

2485

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

1511

2486

1512

Assumes a gobject.MainLoop event loop.

2487

Assumes a GLib.MainLoop event loop.

1513

2488

"""

2489

1514

2490

def __init__(self, server_address, RequestHandlerClass,

1515

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

1516

gnutls_priority=None, use_dbus=True):

2491

interface=None,

2492

use_ipv6=True,

2493

clients=None,

2494

gnutls_priority=None,

2495

use_dbus=True,

2496

socketfd=None):

1517

2497

self.enabled = False

1518

2498

self.clients = clients

1519

2499

if self.clients is None:

1520

self.clients = set()

2500

self.clients = {}

1521

2501

self.use_dbus = use_dbus

1522

2502

self.gnutls_priority = gnutls_priority

1523

2503

IPv6_TCPServer.__init__(self, server_address,

1524

2504

RequestHandlerClass,

1525

2505

interface = interface,

1526

use_ipv6 = use_ipv6)

2506

use_ipv6 = use_ipv6,

2507

socketfd = socketfd)

2508

1527

2509

def server_activate(self):

1528

2510

if self.enabled:

1529

2511

return socketserver.TCPServer.server_activate(self)

2512

1530

2513

def enable(self):

1531

2514

self.enabled = True

1532

def add_pipe(self, parent_pipe):

2515

2516

def add_pipe(self, parent_pipe, proc):

1533

2517

# Call "handle_ipc" for both data and EOF events

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,

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,

1540

2528

client_object=None):

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):

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()

1557

2533

return False

1558

2534

1559

2535

# Read a request from the child

1564

2540

fpr = request[1]

1565

2541

address = request[2]

1566

2542

1567

for c in self.clients:

2543

for c in self.clients.values():

1568

2544

if c.fingerprint == fpr:

1569

2545

client = c

1570

2546

break

1573

2549

"dress: %s", fpr, address)

1574

2550

if self.use_dbus:

1575

2551

# Emit D-Bus signal

1576

mandos_dbus_service.ClientNotFound(fpr, address[0])

2552

mandos_dbus_service.ClientNotFound(fpr,

2553

address[0])

1577

2554

parent_pipe.send(False)

1578

2555

return False

1579

2556

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))

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))

1585

2564

parent_pipe.send(True)

1586

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

2565

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

2566

# same fileno

1587

2567

return False

1588

2568

if command == 'funcall':

1589

2569

funcname = request[1]

1590

2570

args = request[2]

1591

2571

kwargs = request[3]

1592

2572

1593

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

1594

2573

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

2574

funcname)(*args,

2575

**kwargs)))

2576

1595

2577

if command == 'getattr':

1596

2578

attrname = request[1]

1597

if callable(client_object.__getattribute__(attrname)):

1598

parent_pipe.send(('function',))

2579

if isinstance(client_object.__getattribute__(attrname),

2580

collections.Callable):

2581

parent_pipe.send(('function', ))

1599

2582

else:

1600

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

2583

parent_pipe.send((

2584

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

1601

2585

1602

2586

if command == 'setattr':

1603

2587

attrname = request[1]

1604

2588

value = request[2]

1605

2589

setattr(client_object, attrname, value)

1606

2590

1607

2591

return True

1608

2592

1609

2593

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

1610

2690

def string_to_delta(interval):

1611

2691

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

1612

2692

1623

2703

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

1624

2704

datetime.timedelta(0, 330)

1625

2705

"""

2706

2707

try:

2708

return rfc3339_duration_to_delta(interval)

2709

except ValueError:

2710

pass

2711

1626

2712

timevalue = datetime.timedelta(0)

1627

2713

for s in interval.split():

1628

2714

try:

1629

suffix = unicode(s[-1])

2715

suffix = s[-1]

1630

2716

value = int(s[:-1])

1631

2717

if suffix == "d":

1632

2718

delta = datetime.timedelta(value)

1639

2725

elif suffix == "w":

1640

2726

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

1641

2727

else:

1642

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

1643

except (ValueError, IndexError) as e:

2728

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

2729

except IndexError as e:

1644

2730

raise ValueError(*(e.args))

1645

2731

timevalue += delta

1646

2732

return timevalue

1647

2733

1648

2734

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

1673

2735

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

1674

2736

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

1675

2737

1683

2745

sys.exit()

1684

2746

if not noclose:

1685

2747

# Close all standard open file descriptors

1686

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

2748

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

1687

2749

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

1688

2750

raise OSError(errno.ENODEV,

1689

"%s not a character device"

1690

% os.path.devnull)

2751

"{} not a character device"

2752

.format(os.devnull))

1691

2753

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

1692

2754

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

1693

2755

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

1702

2764

1703

2765

parser = argparse.ArgumentParser()

1704

2766

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

1705

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

2767

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

1706

2768

help="show version number and exit")

1707

2769

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

1708

2770

help="Bind to interface IF")

1714

2776

help="Run self-test")

1715

2777

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

1716

2778

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

1717

" to terminal")

2779

" to terminal", default=None)

1718

2780

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

1719

2781

help="Debug level for stdout output")

1720

2782

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

1727

2789

" files")

1728

2790

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

1729

2791

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

1730

" system bus interface")

2792

" system bus interface", default=None)

1731

2793

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

1732

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

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

1733

2810

options = parser.parse_args()

1734

2811

1735

2812

if options.check:

1736

2813

import doctest

1737

doctest.testmod()

1738

sys.exit()

2814

fail_count, test_count = doctest.testmod()

2815

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

1739

2816

1740

2817

# Default values for config file for server-global settings

1741

2818

server_defaults = { "interface": "",

1743

2820

"port": "",

1744

2821

"debug": "False",

1745

2822

"priority":

1746

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

2823

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

2824

":+SIGN-DSA-SHA256",

1747

2825

"servicename": "Mandos",

1748

2826

"use_dbus": "True",

1749

2827

"use_ipv6": "True",

1750

2828

"debuglevel": "",

1751

}

2829

"restore": "True",

2830

"socket": "",

2831

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

2832

"foreground": "False",

2833

"zeroconf": "True",

2834

}

1752

2835

1753

2836

# Parse config file for server-global settings

1754

2837

server_config = configparser.SafeConfigParser(server_defaults)

1755

2838

del server_defaults

1756

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

1757

"mandos.conf"))

2839

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

1758

2840

# Convert the SafeConfigParser object to a dict

1759

2841

server_settings = server_config.defaults()

1760

2842

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

1761

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

2843

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

1762

2844

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

1763

2845

option)

1764

2846

if server_settings["port"]:

1765

2847

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

1766

2848

"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"])

1767

2858

del server_config

1768

2859

1769

2860

# Override the settings from the config file with command line

1770

2861

# options, if set.

1771

2862

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

1772

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

1773

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

2863

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

2864

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

2865

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

1774

2866

value = getattr(options, option)

1775

2867

if value is not None:

1776

2868

server_settings[option] = value

1777

2869

del options

1778

2870

# Force all strings to be unicode

1779

2871

for option in server_settings.keys():

1780

if type(server_settings[option]) is str:

1781

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

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

1782

2882

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

1783

2883

1784

2884

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

1785

2885

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

1786

2891

# For convenience

1787

2892

debug = server_settings["debug"]

1788

2893

debuglevel = server_settings["debuglevel"]

1789

2894

use_dbus = server_settings["use_dbus"]

1790

2895

use_ipv6 = server_settings["use_ipv6"]

1791

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

1792

2910

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

1793

syslogger.setFormatter(logging.Formatter

1794

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

1795

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

1796

% server_settings["servicename"]))

2911

syslogger.setFormatter(

2912

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

2913

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

2914

server_settings["servicename"])))

1797

2915

1798

2916

# Parse config file with clients

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)

2917

client_config = configparser.SafeConfigParser(Client

2918

.client_defaults)

1807

2919

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

1808

2920

"clients.conf"))

1809

2921

1810

2922

global mandos_dbus_service

1811

2923

mandos_dbus_service = None

1812

2924

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"

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

1824

2941

try:

1825

pidfile = open(pidfilename, "w")

1826

except IOError:

1827

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

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)

1828

2946

1829

try:

1830

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

1831

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

1832

except KeyError:

2947

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

2948

("mandos", "mandos"),

2949

("nobody", "nogroup")):

1833

2950

try:

1834

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

1835

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

2951

uid = pwd.getpwnam(name).pw_uid

2952

gid = pwd.getpwnam(group).pw_gid

2953

break

1836

2954

except KeyError:

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

2955

continue

2956

else:

2957

uid = 65534

2958

gid = 65534

1843

2959

try:

1844

2960

os.setgid(gid)

1845

2961

os.setuid(uid)

2962

if debug:

2963

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

2964

gid))

1846

2965

except OSError as error:

1847

if error[0] != errno.EPERM:

1848

raise 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

1849

2970

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

1858

2971

if debug:

1859

2972

# Enable all possible GnuTLS debugging

1860

2973

1861

2974

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

1862

2975

# - GnuTLS manual

1863

gnutls.library.functions.gnutls_global_set_log_level(11)

2976

gnutls.global_set_log_level(11)

1864

2977

1865

@gnutls.library.types.gnutls_log_func

2978

@gnutls.log_func

1866

2979

def debug_gnutls(level, string):

1867

2980

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

1868

2981

1869

(gnutls.library.functions

1870

.gnutls_global_set_log_function(debug_gnutls))

2982

gnutls.global_set_log_function(debug_gnutls)

1871

2983

1872

2984

# Redirect stdin so all checkers get /dev/null

1873

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

2985

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

1874

2986

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

1875

2987

if null > 2:

1876

2988

os.close(null)

1877

else:

1878

# No console logging

1879

logger.removeHandler(console)

1880

2989

1881

2990

# Need to fork before connecting to D-Bus

1882

if not debug:

2991

if not foreground:

1883

2992

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

1884

2993

daemon()

1885

2994

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

1886

2999

global main_loop

1887

3000

# From the Avahi example code

1888

DBusGMainLoop(set_as_default=True )

1889

main_loop = gobject.MainLoop()

3001

DBusGMainLoop(set_as_default=True)

3002

main_loop = GLib.MainLoop()

1890

3003

bus = dbus.SystemBus()

1891

3004

# End of Avahi example code

1892

3005

if use_dbus:

1893

3006

try:

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")

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)

1898

3015

use_dbus = False

1899

3016

server_settings["use_dbus"] = False

1900

3017

tcp_server.use_dbus = False

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"])))

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"))

1908

3028

1909

3029

global multiprocessing_manager

1910

3030

multiprocessing_manager = multiprocessing.Manager()

1912

3032

client_class = Client

1913

3033

if use_dbus:

1914

3034

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

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):

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))

1922

3162

try:

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()))

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

1932

3188

if not tcp_server.clients:

1933

3189

logger.warning("No clients defined")

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

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

1947

3201

del pidfilename

1948

1949

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

1950

3202

1951

3203

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

1952

3204

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

1953

3205

1954

3206

if use_dbus:

1955

class MandosDBusService(dbus.service.Object):

3207

3208

@alternate_dbus_interfaces(

3209

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

3210

class MandosDBusService(DBusObjectWithObjectManager):

1956

3211

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

3212

1957

3213

def __init__(self):

1958

3214

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

1959

_interface = "se.bsnet.fukt.Mandos"

3215

3216

_interface = "se.recompile.Mandos"

1960

3217

1961

3218

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

1962

3219

def ClientAdded(self, objpath):

1968

3225

"D-Bus signal"

1969

3226

pass

1970

3227

3228

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

3229

"true"})

1971

3230

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

1972

3231

def ClientRemoved(self, objpath, name):

1973

3232

"D-Bus signal"

1974

3233

pass

1975

3234

3235

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

3236

"true"})

1976

3237

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

1977

3238

def GetAllClients(self):

1978

3239

"D-Bus method"

1979

return dbus.Array(c.dbus_object_path

1980

for c in tcp_server.clients)

3240

return dbus.Array(c.dbus_object_path for c in

3241

tcp_server.clients.values())

1981

3242

3243

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

3244

"true"})

1982

3245

@dbus.service.method(_interface,

1983

3246

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

1984

3247

def GetAllClientsWithProperties(self):

1985

3248

"D-Bus method"

1986

3249

return dbus.Dictionary(

1987

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

1988

for c in tcp_server.clients),

3250

{ c.dbus_object_path: c.GetAll(

3251

"se.recompile.Mandos.Client")

3252

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

1989

3253

signature="oa{sv}")

1990

3254

1991

3255

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

1992

3256

def RemoveClient(self, object_path):

1993

3257

"D-Bus method"

1994

for c in tcp_server.clients:

3258

for c in tcp_server.clients.values():

1995

3259

if c.dbus_object_path == object_path:

1996

tcp_server.clients.remove(c)

3260

del tcp_server.clients[c.name]

1997

3261

c.remove_from_connection()

1998

# Don't signal anything except ClientRemoved

3262

# Don't signal the disabling

1999

3263

c.disable(quiet=True)

2000

# Emit D-Bus signal

2001

self.ClientRemoved(object_path, c.name)

3264

# Emit D-Bus signal for removal

3265

self.client_removed_signal(c)

2002

3266

return

2003

3267

raise KeyError(object_path)

2004

3268

2005

3269

del _interface

3270

3271

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3272

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

3273

def GetManagedObjects(self):

3274

"""D-Bus method"""

3275

return dbus.Dictionary(

3276

{ client.dbus_object_path:

3277

dbus.Dictionary(

3278

{ interface: client.GetAll(interface)

3279

for interface in

3280

client._get_all_interface_names()})

3281

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

3282

3283

def client_added_signal(self, client):

3284

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

3285

if use_dbus:

3286

# New standard signal

3287

self.InterfacesAdded(

3288

client.dbus_object_path,

3289

dbus.Dictionary(

3290

{ interface: client.GetAll(interface)

3291

for interface in

3292

client._get_all_interface_names()}))

3293

# Old signal

3294

self.ClientAdded(client.dbus_object_path)

3295

3296

def client_removed_signal(self, client):

3297

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

3298

if use_dbus:

3299

# New standard signal

3300

self.InterfacesRemoved(

3301

client.dbus_object_path,

3302

client._get_all_interface_names())

3303

# Old signal

3304

self.ClientRemoved(client.dbus_object_path,

3305

client.name)

2006

3306

2007

3307

mandos_dbus_service = MandosDBusService()

2008

3308

2009

3309

def cleanup():

2010

3310

"Cleanup function; run on exit"

2011

service.cleanup()

2012

3311

if zeroconf:

3312

service.cleanup()

3313

3314

multiprocessing.active_children()

3315

wnull.close()

3316

if not (tcp_server.clients or client_settings):

3317

return

3318

3319

# Store client before exiting. Secrets are encrypted with key

3320

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

3321

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

3322

clients = {}

3323

with PGPEngine() as pgp:

3324

for client in tcp_server.clients.values():

3325

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

3326

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

3327

key)

3328

client_dict = {}

3329

3330

# A list of attributes that can not be pickled

3331

# + secret.

3332

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

3333

"checker", "server_settings" }

3334

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

3335

.Object):

3336

exclude.add(name)

3337

3338

client_dict["encrypted_secret"] = (client

3339

.encrypted_secret)

3340

for attr in client.client_structure:

3341

if attr not in exclude:

3342

client_dict[attr] = getattr(client, attr)

3343

3344

clients[client.name] = client_dict

3345

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

3346

3347

try:

3348

with tempfile.NamedTemporaryFile(

3349

mode='wb',

3350

suffix=".pickle",

3351

prefix='clients-',

3352

dir=os.path.dirname(stored_state_path),

3353

delete=False) as stored_state:

3354

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

3355

protocol = 2)

3356

tempname = stored_state.name

3357

os.rename(tempname, stored_state_path)

3358

except (IOError, OSError) as e:

3359

if not debug:

3360

try:

3361

os.remove(tempname)

3362

except NameError:

3363

pass

3364

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

3365

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

3366

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

3367

else:

3368

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

3369

exc_info=e)

3370

raise

3371

3372

# Delete all clients, and settings from config

2013

3373

while tcp_server.clients:

2014

client = tcp_server.clients.pop()

3374

name, client = tcp_server.clients.popitem()

2015

3375

if use_dbus:

2016

3376

client.remove_from_connection()

2017

client.disable_hook = None

2018

# Don't signal anything except ClientRemoved

3377

# Don't signal the disabling

2019

3378

client.disable(quiet=True)

3379

# Emit D-Bus signal for removal

2020

3380

if use_dbus:

2021

# Emit D-Bus signal

2022

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2023

client.name)

3381

mandos_dbus_service.client_removed_signal(client)

3382

client_settings.clear()

2024

3383

2025

3384

atexit.register(cleanup)

2026

3385

2027

for client in tcp_server.clients:

3386

for client in tcp_server.clients.values():

2028

3387

if use_dbus:

2029

# Emit D-Bus signal

2030

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2031

client.enable()

3388

# Emit D-Bus signal for adding

3389

mandos_dbus_service.client_added_signal(client)

3390

# Need to initiate checking of clients

3391

if client.enabled:

3392

client.init_checker()

2032

3393

2033

3394

tcp_server.enable()

2034

3395

tcp_server.server_activate()

2035

3396

2036

3397

# Find out what port we got

2037

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

3398

if zeroconf:

3399

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

2038

3400

if use_ipv6:

2039

3401

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

2040

" flowinfo %d, scope_id %d"

2041

% tcp_server.socket.getsockname())

3402

" flowinfo %d, scope_id %d",

3403

*tcp_server.socket.getsockname())

2042

3404

else: # IPv4

2043

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

2044

% tcp_server.socket.getsockname())

3405

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

3406

*tcp_server.socket.getsockname())

2045

3407

2046

3408

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

2047

3409

2048

3410

try:

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

3411

if zeroconf:

3412

# From the Avahi example code

3413

try:

3414

service.activate()

3415

except dbus.exceptions.DBusException as error:

3416

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

3417

cleanup()

3418

sys.exit(1)

3419

# End of Avahi example code

2057

3420

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))

3421

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

3422

lambda *args, **kwargs:

3423

(tcp_server.handle_request

3424

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

2062

3425

2063

3426

logger.debug("Starting main loop")

2064

3427

main_loop.run()

2065

3428

except AvahiError as error:

2066

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

3429

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

2067

3430

cleanup()

2068

3431

sys.exit(1)

2069

3432

except KeyboardInterrupt:

2074

3437

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

2075

3438

cleanup()

2076

3439

3440

2077

3441

if __name__ == '__main__':

2078

3442

main()