/mandos/release : revision 237.7.392

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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 = "1.7.7"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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

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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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# Pretend that we have an Avahi module

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class Avahi(object):

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

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

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

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

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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def string_array_to_txt_array(self, t):

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

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

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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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avahi = Avahi()

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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"""

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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:

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

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self.cleanup()

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os._exit(1)

176

self.rename_count += 1

360

if (error.get_dbus_name()

361

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

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

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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()

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184

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def add(self):

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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 = (

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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

300

extended_timeout: extra long timeout when password has been sent

786

extended_timeout: extra long timeout when secret has been sent

301

787

runtime_expansions: Allowed attributes for runtime expansion.

302

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

788

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

303

789

disabled, or None

790

server_settings: The server_settings dict from main()

304

791

"""

305

792

306

793

runtime_expansions = ("approval_delay", "approval_duration",

307

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

308

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

794

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

795

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

796

"last_approval_request", "last_checked_ok",

309

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

}

310

809

311

810

@staticmethod

312

def _timedelta_to_milliseconds(td):

313

"Convert a datetime.timedelta() to milliseconds"

314

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

315

+ (td.seconds * 1000)

316

+ (td.microseconds // 1000))

317

318

def timeout_milliseconds(self):

319

"Return the 'timeout' attribute in milliseconds"

320

return self._timedelta_to_milliseconds(self.timeout)

321

322

def extended_timeout_milliseconds(self):

323

"Return the 'extended_timeout' attribute in milliseconds"

324

return self._timedelta_to_milliseconds(self.extended_timeout)

325

326

def interval_milliseconds(self):

327

"Return the 'interval' attribute in milliseconds"

328

return self._timedelta_to_milliseconds(self.interval)

329

330

def approval_delay_milliseconds(self):

331

return self._timedelta_to_milliseconds(self.approval_delay)

332

333

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

334

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

335

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

336

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):

337

863

self.name = name

338

if config is None:

339

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

340

881

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

341

# Uppercase and remove spaces from fingerprint for later

342

# comparison purposes with return value from the fingerprint()

343

# function

344

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

345

.replace(" ", ""))

346

882

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

347

if "secret" in config:

348

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

349

elif "secfile" in config:

350

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

351

(config["secfile"])),

352

"rb") as secfile:

353

self.secret = secfile.read()

354

else:

355

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

356

% self.name)

357

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

358

self.created = datetime.datetime.utcnow()

359

self.enabled = False

360

self.last_approval_request = None

361

self.last_enabled = None

362

self.last_checked_ok = None

363

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

364

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

365

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

366

self.disable_hook = disable_hook

883

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

884

datetime.datetime.utcnow())

885

886

# attributes specific for this server instance

367

887

self.checker = None

368

888

self.checker_initiator_tag = None

369

889

self.disable_initiator_tag = None

370

self.expires = None

371

890

self.checker_callback_tag = None

372

self.checker_command = config["checker"]

373

891

self.current_checker_command = None

374

self.last_connect = None

375

self._approved = None

376

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

377

True)

892

self.approved = None

378

893

self.approvals_pending = 0

379

self.approval_delay = string_to_delta(

380

config["approval_delay"])

381

self.approval_duration = string_to_delta(

382

config["approval_duration"])

383

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)

384

905

906

# Send notice to process children that client state has changed

385

907

def send_changedstate(self):

386

self.changedstate.acquire()

387

self.changedstate.notify_all()

388

self.changedstate.release()

389

908

with self.changedstate:

909

self.changedstate.notify_all()

910

390

911

def enable(self):

391

912

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

392

913

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

393

914

# Already enabled

394

915

return

395

self.send_changedstate()

916

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

917

self.enabled = True

396

918

self.last_enabled = datetime.datetime.utcnow()

397

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

398

# and every interval from then on.

399

self.checker_initiator_tag = (gobject.timeout_add

400

(self.interval_milliseconds(),

401

self.start_checker))

402

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

403

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

404

self.disable_initiator_tag = (gobject.timeout_add

405

(self.timeout_milliseconds(),

406

self.disable))

407

self.enabled = True

408

# Also start a new checker *right now*.

409

self.start_checker()

919

self.init_checker()

920

self.send_changedstate()

410

921

411

922

def disable(self, quiet=True):

412

923

"""Disable this client."""

413

924

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

414

925

return False

415

926

if not quiet:

416

self.send_changedstate()

417

if not quiet:

418

927

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

419

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

420

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)

421

930

self.disable_initiator_tag = None

422

931

self.expires = None

423

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

424

gobject.source_remove(self.checker_initiator_tag)

932

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

933

GLib.source_remove(self.checker_initiator_tag)

425

934

self.checker_initiator_tag = None

426

935

self.stop_checker()

427

if self.disable_hook:

428

self.disable_hook(self)

429

936

self.enabled = False

430

# 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

431

940

return False

432

941

433

942

def __del__(self):

434

self.disable_hook = None

435

943

self.disable()

436

944

437

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):

438

963

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

439

964

self.checker_callback_tag = None

440

965

self.checker = None

441

if os.WIFEXITED(condition):

442

exitstatus = os.WEXITSTATUS(condition)

443

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:

444

974

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

445

975

vars(self))

446

976

self.checked_ok()

447

977

else:

448

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

449

vars(self))

978

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

450

979

else:

980

self.last_checker_status = -1

981

self.last_checker_signal = -returncode

451

982

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

452

983

vars(self))

453

454

def checked_ok(self, timeout=None):

455

"""Bump up the timeout for this client.

456

457

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

458

alive and well.

459

"""

984

return False

985

986

def checked_ok(self):

987

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

988

self.last_checked_ok = datetime.datetime.utcnow()

989

self.last_checker_status = 0

990

self.last_checker_signal = None

991

self.bump_timeout()

992

993

def bump_timeout(self, timeout=None):

994

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

460

995

if timeout is None:

461

996

timeout = self.timeout

462

self.last_checked_ok = datetime.datetime.utcnow()

463

gobject.source_remove(self.disable_initiator_tag)

464

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

465

self.disable_initiator_tag = (gobject.timeout_add

466

(self._timedelta_to_milliseconds(timeout),

467

self.disable))

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

468

1004

469

1005

def need_approval(self):

470

1006

self.last_approval_request = datetime.datetime.utcnow()

475

1011

If a checker already exists, leave it running and do

476

1012

nothing."""

477

1013

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

478

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

479

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

480

# client would inevitably timeout, since no checker would get

481

# 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

482

1018

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

483

1019

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

484

1020

# should be.

485

1021

486

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

487

try:

488

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

489

except (AttributeError, OSError) as error:

490

if (isinstance(error, OSError)

491

and error.errno != errno.ECHILD):

492

raise error

493

else:

494

if pid:

495

logger.warning("Checker was a zombie")

496

gobject.source_remove(self.checker_callback_tag)

497

self.checker_callback(pid, status,

498

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

499

1026

# Start a new checker if needed

500

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 }

501

1032

try:

502

# In case checker_command has exactly one % operator

503

command = self.checker_command % self.host

504

except TypeError:

505

# Escape attributes for the shell

506

escaped_attrs = dict(

507

(attr,

508

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

509

errors=

510

'replace')))

511

for attr in

512

self.runtime_expansions)

513

514

try:

515

command = self.checker_command % escaped_attrs

516

except TypeError as error:

517

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

518

' %s', self.checker_command, error)

519

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

520

1039

self.current_checker_command = command

521

try:

522

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

523

command, self.name)

524

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

525

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

526

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

527

# always replaced by /dev/null.)

528

self.checker = subprocess.Popen(command,

529

close_fds=True,

530

shell=True, cwd="/")

531

self.checker_callback_tag = (gobject.child_watch_add

532

(self.checker.pid,

533

self.checker_callback,

534

data=command))

535

# The checker may have completed before the gobject

536

# watch was added. Check for this.

537

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

538

if pid:

539

gobject.source_remove(self.checker_callback_tag)

540

self.checker_callback(pid, status, command)

541

except OSError as error:

542

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

543

error)

544

# 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

545

1066

return True

546

1067

547

1068

def stop_checker(self):

548

1069

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

549

1070

if self.checker_callback_tag:

550

gobject.source_remove(self.checker_callback_tag)

1071

GLib.source_remove(self.checker_callback_tag)

551

1072

self.checker_callback_tag = None

552

1073

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

553

1074

return

554

1075

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

555

try:

556

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

557

#time.sleep(0.5)

558

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

559

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

560

except OSError as error:

561

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

562

raise

1076

self.checker.terminate()

563

1077

self.checker = None

564

1078

565

def dbus_service_property(dbus_interface, signature="v",

566

access="readwrite", byte_arrays=False):

1079

1080

def dbus_service_property(dbus_interface,

1081

signature="v",

1082

access="readwrite",

1083

byte_arrays=False):

567

1084

"""Decorators for marking methods of a DBusObjectWithProperties to

568

1085

become properties on the D-Bus.

569

1086

578

1095

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

579

1096

if byte_arrays and signature != "ay":

580

1097

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

581

" signature %r" % signature)

1098

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

1099

582

1100

def decorator(func):

583

1101

func._dbus_is_property = True

584

1102

func._dbus_interface = dbus_interface

589

1107

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

590

1108

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

591

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

592

1154

return decorator

593

1155

594

1156

595

1157

class DBusPropertyException(dbus.exceptions.DBusException):

596

1158

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

597

1159

"""

598

def __unicode__(self):

599

return unicode(str(self))

1160

pass

600

1161

601

1162

602

1163

class DBusPropertyAccessException(DBusPropertyException):

611

1172

pass

612

1173

613

1174

614

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):

615

1265

"""A D-Bus object with properties.

616

1266

617

1267

Classes inheriting from this can use the dbus_service_property

618

1268

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

619

1269

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

620

1270

"""

621

1271

622

@staticmethod

623

def _is_dbus_property(obj):

624

return getattr(obj, "_dbus_is_property", False)

625

626

def _get_all_dbus_properties(self):

627

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

628

"""

629

return ((prop._dbus_name, prop)

630

for name, prop in

631

inspect.getmembers(self, self._is_dbus_property))

632

633

1272

def _get_dbus_property(self, interface_name, property_name):

634

1273

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

635

1274

property with the specified name and interface.

636

1275

"""

637

for name in (property_name,

638

property_name + "_dbus_property"):

639

prop = getattr(self, name, None)

640

if (prop is None

641

or not self._is_dbus_property(prop)

642

or prop._dbus_name != property_name

643

or (interface_name and prop._dbus_interface

644

and interface_name != prop._dbus_interface)):

645

continue

646

return prop

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

647

1283

# No such property

648

raise DBusPropertyNotFound(self.dbus_object_path + ":"

649

+ interface_name + "."

650

+ property_name)

651

652

@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",

653

1298

out_signature="v")

654

1299

def Get(self, interface_name, property_name):

655

1300

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

673

1318

# The byte_arrays option is not supported yet on

674

1319

# signatures other than "ay".

675

1320

if prop._dbus_signature != "ay":

676

raise ValueError

677

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

678

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))

679

1326

prop(value)

680

1327

681

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

1328

@dbus.service.method(dbus.PROPERTIES_IFACE,

1329

in_signature="s",

682

1330

out_signature="a{sv}")

683

1331

def GetAll(self, interface_name):

684

1332

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

685

1333

standard.

686

1334

687

1335

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

688

1336

"""

689

all = {}

690

for name, prop in self._get_all_dbus_properties():

1337

properties = {}

1338

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

691

1339

if (interface_name

692

1340

and interface_name != prop._dbus_interface):

693

1341

# Interface non-empty but did not match

697

1345

continue

698

1346

value = prop()

699

1347

if not hasattr(value, "variant_level"):

700

all[name] = value

1348

properties[name] = value

701

1349

continue

702

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

703

value.variant_level+1)

704

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

705

1361

706

1362

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

707

1363

out_signature="s",

708

1364

path_keyword='object_path',

709

1365

connection_keyword='connection')

710

1366

def Introspect(self, object_path, connection):

711

"""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.

712

1370

"""

713

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

714

connection)

1371

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1372

object_path,

1373

connection)

715

1374

try:

716

1375

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

1376

717

1377

def make_tag(document, name, prop):

718

1378

e = document.createElement("property")

719

1379

e.setAttribute("name", name)

720

1380

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

721

1381

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

722

1382

return e

1383

723

1384

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

1385

# Add property tags

724

1386

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

725

1387

for name, prop

726

in self._get_all_dbus_properties()

1388

in self._get_all_dbus_things("property")

727

1389

if prop._dbus_interface

728

1390

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

729

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)

730

1408

# Add the names to the return values for the

731

1409

# "org.freedesktop.DBus.Properties" methods

732

1410

if (if_tag.getAttribute("name")

747

1425

except (AttributeError, xml.dom.DOMException,

748

1426

xml.parsers.expat.ExpatError) as error:

749

1427

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

750

error)

751

return xmlstring

752

753

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"})

754

1676

class ClientDBus(Client, DBusObjectWithProperties):

755

1677

"""A Client class using D-Bus

756

1678

760

1682

"""

761

1683

762

1684

runtime_expansions = (Client.runtime_expansions

763

+ ("dbus_object_path",))

1685

+ ("dbus_object_path", ))

1686

1687

_interface = "se.recompile.Mandos.Client"

764

1688

765

1689

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

766

1690

767

1691

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

768

self._approvals_pending = 0

769

1692

self.bus = bus

770

1693

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

771

1694

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

772

1695

# the D-Bus

773

client_object_name = unicode(self.name).translate(

1696

client_object_name = str(self.name).translate(

774

1697

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

775

1698

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

776

self.dbus_object_path = (dbus.ObjectPath

777

("/clients/" + client_object_name))

1699

self.dbus_object_path = dbus.ObjectPath(

1700

"/clients/" + client_object_name)

778

1701

DBusObjectWithProperties.__init__(self, self.bus,

779

1702

self.dbus_object_path)

780

def _set_expires(self, value):

781

old_value = getattr(self, "_expires", None)

782

self._expires = value

783

if hasattr(self, "dbus_object_path") and old_value != value:

784

dbus_time = (self._datetime_to_dbus(self._expires,

785

variant_level=1))

786

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

787

dbus_time)

788

expires = property(lambda self: self._expires, _set_expires)

789

del _set_expires

790

791

def _get_approvals_pending(self):

792

return self._approvals_pending

793

def _set_approvals_pending(self, value):

794

old_value = self._approvals_pending

795

self._approvals_pending = value

796

bval = bool(value)

797

if (hasattr(self, "dbus_object_path")

798

and bval is not bool(old_value)):

799

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

800

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

801

dbus_bool)

802

803

approvals_pending = property(_get_approvals_pending,

804

_set_approvals_pending)

805

del _get_approvals_pending, _set_approvals_pending

806

807

@staticmethod

808

def _datetime_to_dbus(dt, variant_level=0):

809

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

810

if dt is None:

811

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

812

return dbus.String(dt.isoformat(),

813

variant_level=variant_level)

814

815

def enable(self):

816

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

817

r = Client.enable(self)

818

if oldstate != self.enabled:

819

# Emit D-Bus signals

820

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

821

dbus.Boolean(True, variant_level=1))

822

self.PropertyChanged(

823

dbus.String("LastEnabled"),

824

self._datetime_to_dbus(self.last_enabled,

825

variant_level=1))

826

return r

827

828

def disable(self, quiet = False):

829

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

830

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

831

if not quiet and oldstate != self.enabled:

832

# Emit D-Bus signal

833

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

834

dbus.Boolean(False, variant_level=1))

835

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

836

1784

837

1785

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

838

1786

try:

843

1791

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

844

1792

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

845

1793

846

def checker_callback(self, pid, condition, command,

847

*args, **kwargs):

848

self.checker_callback_tag = None

849

self.checker = None

850

# Emit D-Bus signal

851

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

852

dbus.Boolean(False, variant_level=1))

853

if os.WIFEXITED(condition):

854

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:

855

1801

# Emit D-Bus signal

856

1802

self.CheckerCompleted(dbus.Int16(exitstatus),

857

dbus.Int64(condition),

1803

# This is specific to GNU libC

1804

dbus.Int64(exitstatus << 8),

858

1805

dbus.String(command))

859

1806

else:

860

1807

# Emit D-Bus signal

861

1808

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

862

dbus.Int64(condition),

1809

dbus.Int64(

1810

# This is specific to GNU libC

1811

(exitstatus << 8)

1812

| self.last_checker_signal),

863

1813

dbus.String(command))

864

865

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

866

*args, **kwargs)

867

868

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

869

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

870

# Emit D-Bus signal

871

self.PropertyChanged(

872

dbus.String("LastCheckedOK"),

873

(self._datetime_to_dbus(self.last_checked_ok,

874

variant_level=1)))

875

876

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

877

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

878

# Emit D-Bus signal

879

self.PropertyChanged(

880

dbus.String("LastApprovalRequest"),

881

(self._datetime_to_dbus(self.last_approval_request,

882

variant_level=1)))

883

return r

1814

return ret

884

1815

885

1816

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

886

old_checker = self.checker

887

if self.checker is not None:

888

old_checker_pid = self.checker.pid

889

else:

890

old_checker_pid = None

1817

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

891

1818

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

892

1819

# Only if new checker process was started

893

1820

if (self.checker is not None

894

1821

and old_checker_pid != self.checker.pid):

895

1822

# Emit D-Bus signal

896

1823

self.CheckerStarted(self.current_checker_command)

897

self.PropertyChanged(

898

dbus.String("CheckerRunning"),

899

dbus.Boolean(True, variant_level=1))

900

1824

return r

901

1825

902

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

903

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

904

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

905

if (old_checker is not None

906

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

907

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

908

dbus.Boolean(False, variant_level=1))

909

return r

910

911

1826

def _reset_approved(self):

912

self._approved = None

1827

self.approved = None

913

1828

return False

914

1829

915

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)

916

1834

self.send_changedstate()

917

self._approved = value

918

gobject.timeout_add(self._timedelta_to_milliseconds

919

(self.approval_duration),

920

self._reset_approved)

921

922

1835

923

1836

## D-Bus methods, signals & properties

924

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

1837

1838

## Interfaces

925

1839

926

1840

## Signals

927

1841

938

1852

pass

939

1853

940

1854

# PropertyChanged - signal

1855

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

941

1856

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

942

1857

def PropertyChanged(self, property, value):

943

1858

"D-Bus signal"

977

1892

self.checked_ok()

978

1893

979

1894

# Enable - method

1895

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

980

1896

@dbus.service.method(_interface)

981

1897

def Enable(self):

982

1898

"D-Bus method"

983

1899

self.enable()

984

1900

985

1901

# StartChecker - method

1902

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

986

1903

@dbus.service.method(_interface)

987

1904

def StartChecker(self):

988

1905

"D-Bus method"

989

1906

self.start_checker()

990

1907

991

1908

# Disable - method

1909

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

992

1910

@dbus.service.method(_interface)

993

1911

def Disable(self):

994

1912

"D-Bus method"

995

1913

self.disable()

996

1914

997

1915

# StopChecker - method

1916

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

998

1917

@dbus.service.method(_interface)

999

1918

def StopChecker(self):

1000

1919

self.stop_checker()

1007

1926

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

1008

1927

1009

1928

# ApprovedByDefault - property

1010

@dbus_service_property(_interface, signature="b",

1929

@dbus_service_property(_interface,

1930

signature="b",

1011

1931

access="readwrite")

1012

1932

def ApprovedByDefault_dbus_property(self, value=None):

1013

1933

if value is None: # get

1014

1934

return dbus.Boolean(self.approved_by_default)

1015

old_value = self.approved_by_default

1016

1935

self.approved_by_default = bool(value)

1017

# Emit D-Bus signal

1018

if old_value != self.approved_by_default:

1019

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

1020

dbus.Boolean(value, variant_level=1))

1021

1936

1022

1937

# ApprovalDelay - property

1023

@dbus_service_property(_interface, signature="t",

1938

@dbus_service_property(_interface,

1939

signature="t",

1024

1940

access="readwrite")

1025

1941

def ApprovalDelay_dbus_property(self, value=None):

1026

1942

if value is None: # get

1027

return dbus.UInt64(self.approval_delay_milliseconds())

1028

old_value = self.approval_delay

1943

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

1944

* 1000)

1029

1945

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

1030

# Emit D-Bus signal

1031

if old_value != self.approval_delay:

1032

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

1033

dbus.UInt64(value, variant_level=1))

1034

1946

1035

1947

# ApprovalDuration - property

1036

@dbus_service_property(_interface, signature="t",

1948

@dbus_service_property(_interface,

1949

signature="t",

1037

1950

access="readwrite")

1038

1951

def ApprovalDuration_dbus_property(self, value=None):

1039

1952

if value is None: # get

1040

return dbus.UInt64(self._timedelta_to_milliseconds(

1041

self.approval_duration))

1042

old_value = self.approval_duration

1953

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

1954

* 1000)

1043

1955

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

1044

# Emit D-Bus signal

1045

if old_value != self.approval_duration:

1046

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

1047

dbus.UInt64(value, variant_level=1))

1048

1956

1049

1957

# Name - property

1958

@dbus_annotations(

1959

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

1050

1960

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

1051

1961

def Name_dbus_property(self):

1052

1962

return dbus.String(self.name)

1053

1963

1054

1964

# Fingerprint - property

1965

@dbus_annotations(

1966

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

1055

1967

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

1056

1968

def Fingerprint_dbus_property(self):

1057

1969

return dbus.String(self.fingerprint)

1058

1970

1059

1971

# Host - property

1060

@dbus_service_property(_interface, signature="s",

1972

@dbus_service_property(_interface,

1973

signature="s",

1061

1974

access="readwrite")

1062

1975

def Host_dbus_property(self, value=None):

1063

1976

if value is None: # get

1064

1977

return dbus.String(self.host)

1065

old_value = self.host

1066

self.host = value

1067

# Emit D-Bus signal

1068

if old_value != self.host:

1069

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

1070

dbus.String(value, variant_level=1))

1978

self.host = str(value)

1071

1979

1072

1980

# Created - property

1981

@dbus_annotations(

1982

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

1073

1983

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

1074

1984

def Created_dbus_property(self):

1075

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

1985

return datetime_to_dbus(self.created)

1076

1986

1077

1987

# LastEnabled - property

1078

1988

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

1079

1989

def LastEnabled_dbus_property(self):

1080

return self._datetime_to_dbus(self.last_enabled)

1990

return datetime_to_dbus(self.last_enabled)

1081

1991

1082

1992

# Enabled - property

1083

@dbus_service_property(_interface, signature="b",

1993

@dbus_service_property(_interface,

1994

signature="b",

1084

1995

access="readwrite")

1085

1996

def Enabled_dbus_property(self, value=None):

1086

1997

if value is None: # get

1091

2002

self.disable()

1092

2003

1093

2004

# LastCheckedOK - property

1094

@dbus_service_property(_interface, signature="s",

2005

@dbus_service_property(_interface,

2006

signature="s",

1095

2007

access="readwrite")

1096

2008

def LastCheckedOK_dbus_property(self, value=None):

1097

2009

if value is not None:

1098

2010

self.checked_ok()

1099

2011

return

1100

return self._datetime_to_dbus(self.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)

1101

2018

1102

2019

# Expires - property

1103

2020

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

1104

2021

def Expires_dbus_property(self):

1105

return self._datetime_to_dbus(self.expires)

2022

return datetime_to_dbus(self.expires)

1106

2023

1107

2024

# LastApprovalRequest - property

1108

2025

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

1109

2026

def LastApprovalRequest_dbus_property(self):

1110

return self._datetime_to_dbus(self.last_approval_request)

2027

return datetime_to_dbus(self.last_approval_request)

1111

2028

1112

2029

# Timeout - property

1113

@dbus_service_property(_interface, signature="t",

2030

@dbus_service_property(_interface,

2031

signature="t",

1114

2032

access="readwrite")

1115

2033

def Timeout_dbus_property(self, value=None):

1116

2034

if value is None: # get

1117

return dbus.UInt64(self.timeout_milliseconds())

1118

old_value = self.timeout

2035

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

2036

old_timeout = self.timeout

1119

2037

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

1120

# Emit D-Bus signal

1121

if old_value != self.timeout:

1122

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

1123

dbus.UInt64(value, variant_level=1))

1124

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

1125

return

1126

# Reschedule timeout

1127

gobject.source_remove(self.disable_initiator_tag)

1128

self.disable_initiator_tag = None

1129

self.expires = None

1130

time_to_die = (self.

1131

_timedelta_to_milliseconds((self

1132

.last_checked_ok

1133

+ self.timeout)

1134

- datetime.datetime

1135

.utcnow()))

1136

if time_to_die <= 0:

1137

# The timeout has passed

1138

self.disable()

1139

else:

1140

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

1141

+ datetime.timedelta(milliseconds = time_to_die))

1142

self.disable_initiator_tag = (gobject.timeout_add

1143

(time_to_die, self.disable))

1144

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

1145

2054

# ExtendedTimeout - property

1146

@dbus_service_property(_interface, signature="t",

2055

@dbus_service_property(_interface,

2056

signature="t",

1147

2057

access="readwrite")

1148

2058

def ExtendedTimeout_dbus_property(self, value=None):

1149

2059

if value is None: # get

1150

return dbus.UInt64(self.extended_timeout_milliseconds())

1151

old_value = self.extended_timeout

2060

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

2061

* 1000)

1152

2062

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

1153

# Emit D-Bus signal

1154

if old_value != self.extended_timeout:

1155

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

1156

dbus.UInt64(value, variant_level=1))

1157

2063

1158

2064

# Interval - property

1159

@dbus_service_property(_interface, signature="t",

2065

@dbus_service_property(_interface,

2066

signature="t",

1160

2067

access="readwrite")

1161

2068

def Interval_dbus_property(self, value=None):

1162

2069

if value is None: # get

1163

return dbus.UInt64(self.interval_milliseconds())

1164

old_value = self.interval

2070

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

1165

2071

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

1166

# Emit D-Bus signal

1167

if old_value != self.interval:

1168

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

1169

dbus.UInt64(value, variant_level=1))

1170

2072

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

1171

2073

return

1172

# Reschedule checker run

1173

gobject.source_remove(self.checker_initiator_tag)

1174

self.checker_initiator_tag = (gobject.timeout_add

1175

(value, self.start_checker))

1176

self.start_checker() # Start one now, too

1177

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

1178

2081

# Checker - property

1179

@dbus_service_property(_interface, signature="s",

2082

@dbus_service_property(_interface,

2083

signature="s",

1180

2084

access="readwrite")

1181

2085

def Checker_dbus_property(self, value=None):

1182

2086

if value is None: # get

1183

2087

return dbus.String(self.checker_command)

1184

old_value = self.checker_command

1185

self.checker_command = value

1186

# Emit D-Bus signal

1187

if old_value != self.checker_command:

1188

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

1189

dbus.String(self.checker_command,

1190

variant_level=1))

2088

self.checker_command = str(value)

1191

2089

1192

2090

# CheckerRunning - property

1193

@dbus_service_property(_interface, signature="b",

2091

@dbus_service_property(_interface,

2092

signature="b",

1194

2093

access="readwrite")

1195

2094

def CheckerRunning_dbus_property(self, value=None):

1196

2095

if value is None: # get

1201

2100

self.stop_checker()

1202

2101

1203

2102

# ObjectPath - property

2103

@dbus_annotations(

2104

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

2105

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

1204

2106

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

1205

2107

def ObjectPath_dbus_property(self):

1206

2108

return self.dbus_object_path # is already a dbus.ObjectPath

1207

2109

1208

2110

# Secret = property

1209

@dbus_service_property(_interface, signature="ay",

1210

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)

1211

2118

def Secret_dbus_property(self, value):

1212

self.secret = str(value)

2119

self.secret = bytes(value)

1213

2120

1214

2121

del _interface

1215

2122

1219

2126

self._pipe = child_pipe

1220

2127

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

1221

2128

if not self._pipe.recv():

1222

raise KeyError()

1223

2129

raise KeyError(fpr)

2130

1224

2131

def __getattribute__(self, name):

1225

if(name == '_pipe'):

2132

if name == '_pipe':

1226

2133

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

1227

2134

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

1228

2135

data = self._pipe.recv()

1229

2136

if data[0] == 'data':

1230

2137

return data[1]

1231

2138

if data[0] == 'function':

2139

1232

2140

def func(*args, **kwargs):

1233

2141

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

1234

2142

return self._pipe.recv()[1]

2143

1235

2144

return func

1236

2145

1237

2146

def __setattr__(self, name, value):

1238

if(name == '_pipe'):

2147

if name == '_pipe':

1239

2148

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

1240

2149

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

1241

2150

1249

2158

def handle(self):

1250

2159

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

1251

2160

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

1252

unicode(self.client_address))

2161

str(self.client_address))

1253

2162

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

1254

2163

self.server.child_pipe.fileno())

1255

1256

session = (gnutls.connection

1257

.ClientSession(self.request,

1258

gnutls.connection

1259

.X509Credentials()))

1260

1261

# Note: gnutls.connection.X509Credentials is really a

1262

# generic GnuTLS certificate credentials object so long as

1263

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

1264

# here despite using OpenPGP certificates.

1265

2164

2165

session = gnutls.ClientSession(self.request)

2166

1266

2167

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

1267

2168

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

1268

2169

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

1271

2172

priority = self.server.gnutls_priority

1272

2173

if priority is None:

1273

2174

priority = "NORMAL"

1274

(gnutls.library.functions

1275

.gnutls_priority_set_direct(session._c_object,

1276

priority, None))

1277

2175

gnutls.priority_set_direct(session._c_object, priority,

2176

None)

2177

1278

2178

# Start communication using the Mandos protocol

1279

2179

# Get protocol number

1280

2180

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

1281

2181

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

1282

2182

try:

1283

2183

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

1284

raise RuntimeError

2184

raise RuntimeError(line)

1285

2185

except (ValueError, IndexError, RuntimeError) as error:

1286

2186

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

1287

2187

return

1288

2188

1289

2189

# Start GnuTLS connection

1290

2190

try:

1291

2191

session.handshake()

1292

except gnutls.errors.GNUTLSError as error:

2192

except gnutls.Error as error:

1293

2193

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

1294

2194

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

1295

2195

# established. Just abandon the request.

1296

2196

return

1297

2197

logger.debug("Handshake succeeded")

1298

2198

1299

2199

approval_required = False

1300

2200

try:

1301

2201

try:

1302

fpr = self.fingerprint(self.peer_certificate

1303

(session))

1304

except (TypeError,

1305

gnutls.errors.GNUTLSError) as error:

2202

fpr = self.fingerprint(

2203

self.peer_certificate(session))

2204

except (TypeError, gnutls.Error) as error:

1306

2205

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

1307

2206

return

1308

2207

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

1309

2208

1310

2209

try:

1311

2210

client = ProxyClient(child_pipe, fpr,

1312

2211

self.client_address)

1321

2220

while True:

1322

2221

if not client.enabled:

1323

2222

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

1324

client.name)

2223

client.name)

1325

2224

if self.server.use_dbus:

1326

2225

# Emit D-Bus signal

1327

client.Rejected("Disabled")

2226

client.Rejected("Disabled")

1328

2227

return

1329

2228

1330

if client._approved or not client.approval_delay:

2229

if client.approved or not client.approval_delay:

1331

2230

#We are approved or approval is disabled

1332

2231

break

1333

elif client._approved is None:

2232

elif client.approved is None:

1334

2233

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

1335

2234

client.name)

1336

2235

if self.server.use_dbus:

1337

2236

# Emit D-Bus signal

1338

2237

client.NeedApproval(

1339

client.approval_delay_milliseconds(),

1340

client.approved_by_default)

2238

client.approval_delay.total_seconds()

2239

* 1000, client.approved_by_default)

1341

2240

else:

1342

2241

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

1343

2242

client.name)

1347

2246

return

1348

2247

1349

2248

#wait until timeout or approved

1350

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

1351

2249

time = datetime.datetime.now()

1352

2250

client.changedstate.acquire()

1353

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

2251

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

1354

2252

client.changedstate.release()

1355

2253

time2 = datetime.datetime.now()

1356

2254

if (time2 - time) >= delay:

1367

2265

else:

1368

2266

delay -= time2 - time

1369

2267

1370

sent_size = 0

1371

while sent_size < len(client.secret):

1372

try:

1373

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

1374

except gnutls.errors.GNUTLSError as error:

1375

logger.warning("gnutls send failed")

1376

return

1377

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

1378

sent, len(client.secret)

1379

- (sent_size + sent))

1380

sent_size += sent

1381

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

1382

2275

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

1383

# bump the timeout as if seen

1384

client.checked_ok(client.extended_timeout)

2276

# bump the timeout using extended_timeout

2277

client.bump_timeout(client.extended_timeout)

1385

2278

if self.server.use_dbus:

1386

2279

# Emit D-Bus signal

1387

2280

client.GotSecret()

1391

2284

client.approvals_pending -= 1

1392

2285

try:

1393

2286

session.bye()

1394

except gnutls.errors.GNUTLSError as error:

1395

logger.warning("GnuTLS bye failed")

2287

except gnutls.Error as error:

2288

logger.warning("GnuTLS bye failed",

2289

exc_info=error)

1396

2290

1397

2291

@staticmethod

1398

2292

def peer_certificate(session):

1399

2293

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

1400

2294

# If not an OpenPGP certificate...

1401

if (gnutls.library.functions

1402

.gnutls_certificate_type_get(session._c_object)

1403

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1404

# ...do the normal thing

1405

return session.peer_certificate

2295

if (gnutls.certificate_type_get(session._c_object)

2296

!= gnutls.CRT_OPENPGP):

2297

# ...return invalid data

2298

return b""

1406

2299

list_size = ctypes.c_uint(1)

1407

cert_list = (gnutls.library.functions

1408

.gnutls_certificate_get_peers

2300

cert_list = (gnutls.certificate_get_peers

1409

2301

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

1410

2302

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

1411

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

1412

" certificate")

2303

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

1413

2304

if list_size.value == 0:

1414

2305

return None

1415

2306

cert = cert_list[0]

1419

2310

def fingerprint(openpgp):

1420

2311

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1421

2312

# New GnuTLS "datum" with the OpenPGP public key

1422

datum = (gnutls.library.types

1423

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

1424

ctypes.POINTER

1425

(ctypes.c_ubyte)),

1426

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)))

1427

2317

# New empty GnuTLS certificate

1428

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1429

(gnutls.library.functions

1430

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2318

crt = gnutls.openpgp_crt_t()

2319

gnutls.openpgp_crt_init(ctypes.byref(crt))

1431

2320

# Import the OpenPGP public key into the certificate

1432

(gnutls.library.functions

1433

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

1434

gnutls.library.constants

1435

.GNUTLS_OPENPGP_FMT_RAW))

2321

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

2322

gnutls.OPENPGP_FMT_RAW)

1436

2323

# Verify the self signature in the key

1437

2324

crtverify = ctypes.c_uint()

1438

(gnutls.library.functions

1439

.gnutls_openpgp_crt_verify_self(crt, 0,

1440

ctypes.byref(crtverify)))

2325

gnutls.openpgp_crt_verify_self(crt, 0,

2326

ctypes.byref(crtverify))

1441

2327

if crtverify.value != 0:

1442

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1443

raise (gnutls.errors.CertificateSecurityError

1444

("Verify failed"))

2328

gnutls.openpgp_crt_deinit(crt)

2329

raise gnutls.CertificateSecurityError("Verify failed")

1445

2330

# New buffer for the fingerprint

1446

2331

buf = ctypes.create_string_buffer(20)

1447

2332

buf_len = ctypes.c_size_t()

1448

2333

# Get the fingerprint from the certificate into the buffer

1449

(gnutls.library.functions

1450

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

1451

ctypes.byref(buf_len)))

2334

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

2335

ctypes.byref(buf_len))

1452

2336

# Deinit the certificate

1453

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2337

gnutls.openpgp_crt_deinit(crt)

1454

2338

# Convert the buffer to a Python bytestring

1455

2339

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

1456

2340

# Convert the bytestring to hexadecimal notation

1457

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

2341

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

1458

2342

return hex_fpr

1459

2343

1460

2344

1461

2345

class MultiprocessingMixIn(object):

1462

2346

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

2347

1463

2348

def sub_process_main(self, request, address):

1464

2349

try:

1465

2350

self.finish_request(request, address)

1466

except:

2351

except Exception:

1467

2352

self.handle_error(request, address)

1468

2353

self.close_request(request)

1469

2354

1470

2355

def process_request(self, request, address):

1471

2356

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

1472

multiprocessing.Process(target = self.sub_process_main,

1473

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

2357

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

2358

args = (request, address))

2359

proc.start()

2360

return proc

2361

1474

2362

1475

2363

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1476

2364

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

2365

1477

2366

def process_request(self, request, client_address):

1478

2367

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

1479

2368

1480

2369

This function creates a new pipe in self.pipe

1481

2370

"""

1482

2371

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1483

1484

super(MultiprocessingMixInWithPipe,

1485

self).process_request(request, client_address)

2372

2373

proc = MultiprocessingMixIn.process_request(self, request,

2374

client_address)

1486

2375

self.child_pipe.close()

1487

self.add_pipe(parent_pipe)

1488

1489

def add_pipe(self, parent_pipe):

2376

self.add_pipe(parent_pipe, proc)

2377

2378

def add_pipe(self, parent_pipe, proc):

1490

2379

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

1491

raise NotImplementedError

2380

raise NotImplementedError()

2381

1492

2382

1493

2383

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1494

2384

socketserver.TCPServer, object):

1499

2389

interface: None or a network interface name (string)

1500

2390

use_ipv6: Boolean; to use IPv6 or not

1501

2391

"""

2392

1502

2393

def __init__(self, server_address, RequestHandlerClass,

1503

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

"""

1504

2400

self.interface = interface

1505

2401

if use_ipv6:

1506

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.

1507

2429

socketserver.TCPServer.__init__(self, server_address,

1508

2430

RequestHandlerClass)

2431

1509

2432

def server_bind(self):

1510

2433

"""This overrides the normal server_bind() function

1511

2434

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

1517

2440

self.interface)

1518

2441

else:

1519

2442

try:

1520

self.socket.setsockopt(socket.SOL_SOCKET,

1521

SO_BINDTODEVICE,

1522

str(self.interface

1523

+ '\0'))

2443

self.socket.setsockopt(

2444

socket.SOL_SOCKET, SO_BINDTODEVICE,

2445

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

1524

2446

except socket.error as error:

1525

if error[0] == errno.EPERM:

1526

logger.error("No permission to"

1527

" bind to interface %s",

1528

self.interface)

1529

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:

1530

2451

logger.error("SO_BINDTODEVICE not available;"

1531

2452

" cannot bind to interface %s",

1532

2453

self.interface)

2454

elif error.errno == errno.ENODEV:

2455

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

2456

" cannot bind", self.interface)

1533

2457

else:

1534

2458

raise

1535

2459

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

1538

2462

if self.address_family == socket.AF_INET6:

1539

2463

any_address = "::" # in6addr_any

1540

2464

else:

1541

any_address = socket.INADDR_ANY

2465

any_address = "0.0.0.0" # INADDR_ANY

1542

2466

self.server_address = (any_address,

1543

2467

self.server_address[1])

1544

2468

elif not self.server_address[1]:

1545

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

1546

0)

2469

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

1547

2470

# if self.interface:

1548

2471

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

1549

2472

# 0, # port

1561

2484

gnutls_priority GnuTLS priority string

1562

2485

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

1563

2486

1564

Assumes a gobject.MainLoop event loop.

2487

Assumes a GLib.MainLoop event loop.

1565

2488

"""

2489

1566

2490

def __init__(self, server_address, RequestHandlerClass,

1567

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

1568

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):

1569

2497

self.enabled = False

1570

2498

self.clients = clients

1571

2499

if self.clients is None:

1572

self.clients = set()

2500

self.clients = {}

1573

2501

self.use_dbus = use_dbus

1574

2502

self.gnutls_priority = gnutls_priority

1575

2503

IPv6_TCPServer.__init__(self, server_address,

1576

2504

RequestHandlerClass,

1577

2505

interface = interface,

1578

use_ipv6 = use_ipv6)

2506

use_ipv6 = use_ipv6,

2507

socketfd = socketfd)

2508

1579

2509

def server_activate(self):

1580

2510

if self.enabled:

1581

2511

return socketserver.TCPServer.server_activate(self)

2512

1582

2513

def enable(self):

1583

2514

self.enabled = True

1584

def add_pipe(self, parent_pipe):

2515

2516

def add_pipe(self, parent_pipe, proc):

1585

2517

# Call "handle_ipc" for both data and EOF events

1586

gobject.io_add_watch(parent_pipe.fileno(),

1587

gobject.IO_IN | gobject.IO_HUP,

1588

functools.partial(self.handle_ipc,

1589

parent_pipe = parent_pipe))

1590

1591

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,

1592

2528

client_object=None):

1593

condition_names = {

1594

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

1595

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

1596

# blocking).

1597

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

1598

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

1599

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

1600

# broken, usually for pipes and

1601

# sockets).

1602

}

1603

conditions_string = ' | '.join(name

1604

for cond, name in

1605

condition_names.iteritems()

1606

if cond & condition)

1607

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

1608

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()

1609

2533

return False

1610

2534

1611

2535

# Read a request from the child

1616

2540

fpr = request[1]

1617

2541

address = request[2]

1618

2542

1619

for c in self.clients:

2543

for c in self.clients.values():

1620

2544

if c.fingerprint == fpr:

1621

2545

client = c

1622

2546

break

1625

2549

"dress: %s", fpr, address)

1626

2550

if self.use_dbus:

1627

2551

# Emit D-Bus signal

1628

mandos_dbus_service.ClientNotFound(fpr, address[0])

2552

mandos_dbus_service.ClientNotFound(fpr,

2553

address[0])

1629

2554

parent_pipe.send(False)

1630

2555

return False

1631

2556

1632

gobject.io_add_watch(parent_pipe.fileno(),

1633

gobject.IO_IN | gobject.IO_HUP,

1634

functools.partial(self.handle_ipc,

1635

parent_pipe = parent_pipe,

1636

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))

1637

2564

parent_pipe.send(True)

1638

# 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

1639

2567

return False

1640

2568

if command == 'funcall':

1641

2569

funcname = request[1]

1642

2570

args = request[2]

1643

2571

kwargs = request[3]

1644

2572

1645

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

1646

2573

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

2574

funcname)(*args,

2575

**kwargs)))

2576

1647

2577

if command == 'getattr':

1648

2578

attrname = request[1]

1649

if callable(client_object.__getattribute__(attrname)):

1650

parent_pipe.send(('function',))

2579

if isinstance(client_object.__getattribute__(attrname),

2580

collections.Callable):

2581

parent_pipe.send(('function', ))

1651

2582

else:

1652

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

2583

parent_pipe.send((

2584

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

1653

2585

1654

2586

if command == 'setattr':

1655

2587

attrname = request[1]

1656

2588

value = request[2]

1657

2589

setattr(client_object, attrname, value)

1658

2590

1659

2591

return True

1660

2592

1661

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

1662

2690

def string_to_delta(interval):

1663

2691

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

1664

2692

1675

2703

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

1676

2704

datetime.timedelta(0, 330)

1677

2705

"""

2706

2707

try:

2708

return rfc3339_duration_to_delta(interval)

2709

except ValueError:

2710

pass

2711

1678

2712

timevalue = datetime.timedelta(0)

1679

2713

for s in interval.split():

1680

2714

try:

1681

suffix = unicode(s[-1])

2715

suffix = s[-1]

1682

2716

value = int(s[:-1])

1683

2717

if suffix == "d":

1684

2718

delta = datetime.timedelta(value)

1691

2725

elif suffix == "w":

1692

2726

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

1693

2727

else:

1694

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

1695

except (ValueError, IndexError) as e:

2728

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

2729

except IndexError as e:

1696

2730

raise ValueError(*(e.args))

1697

2731

timevalue += delta

1698

2732

return timevalue

1699

2733

1700

2734

1701

def if_nametoindex(interface):

1702

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

1703

1704

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

1705

global if_nametoindex

1706

try:

1707

if_nametoindex = (ctypes.cdll.LoadLibrary

1708

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

1709

.if_nametoindex)

1710

except (OSError, AttributeError):

1711

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

1712

def if_nametoindex(interface):

1713

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

1714

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

1715

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

1716

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1717

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

1718

interface))

1719

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

1720

ifreq[16:20])[0]

1721

return interface_index

1722

return if_nametoindex(interface)

1723

1724

1725

2735

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

1726

2736

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

1727

2737

1735

2745

sys.exit()

1736

2746

if not noclose:

1737

2747

# Close all standard open file descriptors

1738

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

2748

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

1739

2749

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

1740

2750

raise OSError(errno.ENODEV,

1741

"%s not a character device"

1742

% os.path.devnull)

2751

"{} not a character device"

2752

.format(os.devnull))

1743

2753

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

1744

2754

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

1745

2755

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

1754

2764

1755

2765

parser = argparse.ArgumentParser()

1756

2766

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

1757

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

2767

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

1758

2768

help="show version number and exit")

1759

2769

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

1760

2770

help="Bind to interface IF")

1766

2776

help="Run self-test")

1767

2777

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

1768

2778

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

1769

" to terminal")

2779

" to terminal", default=None)

1770

2780

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

1771

2781

help="Debug level for stdout output")

1772

2782

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

1779

2789

" files")

1780

2790

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

1781

2791

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

1782

" system bus interface")

2792

" system bus interface", default=None)

1783

2793

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

1784

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

1785

2810

options = parser.parse_args()

1786

2811

1787

2812

if options.check:

1788

2813

import doctest

1789

doctest.testmod()

1790

sys.exit()

2814

fail_count, test_count = doctest.testmod()

2815

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

1791

2816

1792

2817

# Default values for config file for server-global settings

1793

2818

server_defaults = { "interface": "",

1795

2820

"port": "",

1796

2821

"debug": "False",

1797

2822

"priority":

1798

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

2823

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

2824

":+SIGN-DSA-SHA256",

1799

2825

"servicename": "Mandos",

1800

2826

"use_dbus": "True",

1801

2827

"use_ipv6": "True",

1802

2828

"debuglevel": "",

1803

}

2829

"restore": "True",

2830

"socket": "",

2831

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

2832

"foreground": "False",

2833

"zeroconf": "True",

2834

}

1804

2835

1805

2836

# Parse config file for server-global settings

1806

2837

server_config = configparser.SafeConfigParser(server_defaults)

1807

2838

del server_defaults

1808

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

1809

"mandos.conf"))

2839

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

1810

2840

# Convert the SafeConfigParser object to a dict

1811

2841

server_settings = server_config.defaults()

1812

2842

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

1813

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

2843

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

1814

2844

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

1815

2845

option)

1816

2846

if server_settings["port"]:

1817

2847

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

1818

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"])

1819

2858

del server_config

1820

2859

1821

2860

# Override the settings from the config file with command line

1822

2861

# options, if set.

1823

2862

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

1824

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

1825

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

2863

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

2864

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

2865

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

1826

2866

value = getattr(options, option)

1827

2867

if value is not None:

1828

2868

server_settings[option] = value

1829

2869

del options

1830

2870

# Force all strings to be unicode

1831

2871

for option in server_settings.keys():

1832

if type(server_settings[option]) is str:

1833

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

1834

2882

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

1835

2883

1836

2884

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

1837

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

1838

2891

# For convenience

1839

2892

debug = server_settings["debug"]

1840

2893

debuglevel = server_settings["debuglevel"]

1841

2894

use_dbus = server_settings["use_dbus"]

1842

2895

use_ipv6 = server_settings["use_ipv6"]

1843

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

1844

2910

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

1845

syslogger.setFormatter(logging.Formatter

1846

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

1847

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

1848

% server_settings["servicename"]))

2911

syslogger.setFormatter(

2912

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

2913

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

2914

server_settings["servicename"])))

1849

2915

1850

2916

# Parse config file with clients

1851

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

1852

"extended_timeout": "15m",

1853

"interval": "2m",

1854

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

1855

"host": "",

1856

"approval_delay": "0s",

1857

"approval_duration": "1s",

1858

}

1859

client_config = configparser.SafeConfigParser(client_defaults)

2917

client_config = configparser.SafeConfigParser(Client

2918

.client_defaults)

1860

2919

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

1861

2920

"clients.conf"))

1862

2921

1863

2922

global mandos_dbus_service

1864

2923

mandos_dbus_service = None

1865

2924

1866

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

1867

server_settings["port"]),

1868

ClientHandler,

1869

interface=(server_settings["interface"]

1870

or None),

1871

use_ipv6=use_ipv6,

1872

gnutls_priority=

1873

server_settings["priority"],

1874

use_dbus=use_dbus)

1875

if not debug:

1876

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

1877

2941

try:

1878

pidfile = open(pidfilename, "w")

1879

except IOError:

1880

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)

1881

2946

1882

try:

1883

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

1884

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

1885

except KeyError:

2947

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

2948

("mandos", "mandos"),

2949

("nobody", "nogroup")):

1886

2950

try:

1887

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

1888

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

2951

uid = pwd.getpwnam(name).pw_uid

2952

gid = pwd.getpwnam(group).pw_gid

2953

break

1889

2954

except KeyError:

1890

try:

1891

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

1892

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

1893

except KeyError:

1894

uid = 65534

1895

gid = 65534

2955

continue

2956

else:

2957

uid = 65534

2958

gid = 65534

1896

2959

try:

1897

2960

os.setgid(gid)

1898

2961

os.setuid(uid)

2962

if debug:

2963

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

2964

gid))

1899

2965

except OSError as error:

1900

if error[0] != errno.EPERM:

1901

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

1902

2970

1903

if not debug and not debuglevel:

1904

syslogger.setLevel(logging.WARNING)

1905

console.setLevel(logging.WARNING)

1906

if debuglevel:

1907

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

1908

syslogger.setLevel(level)

1909

console.setLevel(level)

1910

1911

2971

if debug:

1912

2972

# Enable all possible GnuTLS debugging

1913

2973

1914

2974

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

1915

2975

# - GnuTLS manual

1916

gnutls.library.functions.gnutls_global_set_log_level(11)

2976

gnutls.global_set_log_level(11)

1917

2977

1918

@gnutls.library.types.gnutls_log_func

2978

@gnutls.log_func

1919

2979

def debug_gnutls(level, string):

1920

2980

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

1921

2981

1922

(gnutls.library.functions

1923

.gnutls_global_set_log_function(debug_gnutls))

2982

gnutls.global_set_log_function(debug_gnutls)

1924

2983

1925

2984

# Redirect stdin so all checkers get /dev/null

1926

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

2985

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

1927

2986

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

1928

2987

if null > 2:

1929

2988

os.close(null)

1930

else:

1931

# No console logging

1932

logger.removeHandler(console)

1933

2989

1934

2990

# Need to fork before connecting to D-Bus

1935

if not debug:

2991

if not foreground:

1936

2992

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

1937

2993

daemon()

1938

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

1939

2999

global main_loop

1940

3000

# From the Avahi example code

1941

DBusGMainLoop(set_as_default=True )

1942

main_loop = gobject.MainLoop()

3001

DBusGMainLoop(set_as_default=True)

3002

main_loop = GLib.MainLoop()

1943

3003

bus = dbus.SystemBus()

1944

3004

# End of Avahi example code

1945

3005

if use_dbus:

1946

3006

try:

1947

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

1948

bus, do_not_queue=True)

1949

except dbus.exceptions.NameExistsException as e:

1950

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)

1951

3015

use_dbus = False

1952

3016

server_settings["use_dbus"] = False

1953

3017

tcp_server.use_dbus = False

1954

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1955

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

1956

servicetype = "_mandos._tcp",

1957

protocol = protocol, bus = bus)

1958

if server_settings["interface"]:

1959

service.interface = (if_nametoindex

1960

(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"))

1961

3028

1962

3029

global multiprocessing_manager

1963

3030

multiprocessing_manager = multiprocessing.Manager()

1965

3032

client_class = Client

1966

3033

if use_dbus:

1967

3034

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

1968

def client_config_items(config, section):

1969

special_settings = {

1970

"approved_by_default":

1971

lambda: config.getboolean(section,

1972

"approved_by_default"),

1973

}

1974

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))

1975

3162

try:

1976

yield (name, special_settings[name]())

1977

except KeyError:

1978

yield (name, value)

1979

1980

tcp_server.clients.update(set(

1981

client_class(name = section,

1982

config= dict(client_config_items(

1983

client_config, section)))

1984

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

1985

3188

if not tcp_server.clients:

1986

3189

logger.warning("No clients defined")

1987

1988

if not debug:

1989

try:

1990

with pidfile:

1991

pid = os.getpid()

1992

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

1993

del pidfile

1994

except IOError:

1995

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

1996

pidfilename, pid)

1997

except NameError:

1998

# "pidfile" was never created

1999

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

2000

3201

del pidfilename

3202

3203

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

3204

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3205

lambda: main_loop.quit() and False)

3206

3207

if use_dbus:

2001

3208

2002

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

2003

2004

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

2005

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

2006

2007

if use_dbus:

2008

class MandosDBusService(dbus.service.Object):

3209

@alternate_dbus_interfaces(

3210

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

3211

class MandosDBusService(DBusObjectWithObjectManager):

2009

3212

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

3213

2010

3214

def __init__(self):

2011

3215

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

2012

_interface = "se.bsnet.fukt.Mandos"

3216

3217

_interface = "se.recompile.Mandos"

2013

3218

2014

3219

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

2015

3220

def ClientAdded(self, objpath):

2021

3226

"D-Bus signal"

2022

3227

pass

2023

3228

3229

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

3230

"true"})

2024

3231

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

2025

3232

def ClientRemoved(self, objpath, name):

2026

3233

"D-Bus signal"

2027

3234

pass

2028

3235

3236

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

3237

"true"})

2029

3238

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

2030

3239

def GetAllClients(self):

2031

3240

"D-Bus method"

2032

return dbus.Array(c.dbus_object_path

2033

for c in tcp_server.clients)

3241

return dbus.Array(c.dbus_object_path for c in

3242

tcp_server.clients.values())

2034

3243

3244

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

3245

"true"})

2035

3246

@dbus.service.method(_interface,

2036

3247

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

2037

3248

def GetAllClientsWithProperties(self):

2038

3249

"D-Bus method"

2039

3250

return dbus.Dictionary(

2040

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

2041

for c in tcp_server.clients),

3251

{ c.dbus_object_path: c.GetAll(

3252

"se.recompile.Mandos.Client")

3253

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

2042

3254

signature="oa{sv}")

2043

3255

2044

3256

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

2045

3257

def RemoveClient(self, object_path):

2046

3258

"D-Bus method"

2047

for c in tcp_server.clients:

3259

for c in tcp_server.clients.values():

2048

3260

if c.dbus_object_path == object_path:

2049

tcp_server.clients.remove(c)

3261

del tcp_server.clients[c.name]

2050

3262

c.remove_from_connection()

2051

# Don't signal anything except ClientRemoved

3263

# Don't signal the disabling

2052

3264

c.disable(quiet=True)

2053

# Emit D-Bus signal

2054

self.ClientRemoved(object_path, c.name)

3265

# Emit D-Bus signal for removal

3266

self.client_removed_signal(c)

2055

3267

return

2056

3268

raise KeyError(object_path)

2057

3269

2058

3270

del _interface

3271

3272

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3273

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

3274

def GetManagedObjects(self):

3275

"""D-Bus method"""

3276

return dbus.Dictionary(

3277

{ client.dbus_object_path:

3278

dbus.Dictionary(

3279

{ interface: client.GetAll(interface)

3280

for interface in

3281

client._get_all_interface_names()})

3282

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

3283

3284

def client_added_signal(self, client):

3285

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

3286

if use_dbus:

3287

# New standard signal

3288

self.InterfacesAdded(

3289

client.dbus_object_path,

3290

dbus.Dictionary(

3291

{ interface: client.GetAll(interface)

3292

for interface in

3293

client._get_all_interface_names()}))

3294

# Old signal

3295

self.ClientAdded(client.dbus_object_path)

3296

3297

def client_removed_signal(self, client):

3298

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

3299

if use_dbus:

3300

# New standard signal

3301

self.InterfacesRemoved(

3302

client.dbus_object_path,

3303

client._get_all_interface_names())

3304

# Old signal

3305

self.ClientRemoved(client.dbus_object_path,

3306

client.name)

2059

3307

2060

3308

mandos_dbus_service = MandosDBusService()

2061

3309

2062

3310

def cleanup():

2063

3311

"Cleanup function; run on exit"

2064

service.cleanup()

2065

3312

if zeroconf:

3313

service.cleanup()

3314

3315

multiprocessing.active_children()

3316

wnull.close()

3317

if not (tcp_server.clients or client_settings):

3318

return

3319

3320

# Store client before exiting. Secrets are encrypted with key

3321

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

3322

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

3323

clients = {}

3324

with PGPEngine() as pgp:

3325

for client in tcp_server.clients.values():

3326

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

3327

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

3328

key)

3329

client_dict = {}

3330

3331

# A list of attributes that can not be pickled

3332

# + secret.

3333

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

3334

"checker", "server_settings" }

3335

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

3336

.Object):

3337

exclude.add(name)

3338

3339

client_dict["encrypted_secret"] = (client

3340

.encrypted_secret)

3341

for attr in client.client_structure:

3342

if attr not in exclude:

3343

client_dict[attr] = getattr(client, attr)

3344

3345

clients[client.name] = client_dict

3346

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

3347

3348

try:

3349

with tempfile.NamedTemporaryFile(

3350

mode='wb',

3351

suffix=".pickle",

3352

prefix='clients-',

3353

dir=os.path.dirname(stored_state_path),

3354

delete=False) as stored_state:

3355

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

3356

protocol = 2)

3357

tempname = stored_state.name

3358

os.rename(tempname, stored_state_path)

3359

except (IOError, OSError) as e:

3360

if not debug:

3361

try:

3362

os.remove(tempname)

3363

except NameError:

3364

pass

3365

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

3366

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

3367

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

3368

else:

3369

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

3370

exc_info=e)

3371

raise

3372

3373

# Delete all clients, and settings from config

2066

3374

while tcp_server.clients:

2067

client = tcp_server.clients.pop()

3375

name, client = tcp_server.clients.popitem()

2068

3376

if use_dbus:

2069

3377

client.remove_from_connection()

2070

client.disable_hook = None

2071

# Don't signal anything except ClientRemoved

3378

# Don't signal the disabling

2072

3379

client.disable(quiet=True)

3380

# Emit D-Bus signal for removal

2073

3381

if use_dbus:

2074

# Emit D-Bus signal

2075

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2076

client.name)

3382

mandos_dbus_service.client_removed_signal(client)

3383

client_settings.clear()

2077

3384

2078

3385

atexit.register(cleanup)

2079

3386

2080

for client in tcp_server.clients:

3387

for client in tcp_server.clients.values():

2081

3388

if use_dbus:

2082

# Emit D-Bus signal

2083

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2084

client.enable()

3389

# Emit D-Bus signal for adding

3390

mandos_dbus_service.client_added_signal(client)

3391

# Need to initiate checking of clients

3392

if client.enabled:

3393

client.init_checker()

2085

3394

2086

3395

tcp_server.enable()

2087

3396

tcp_server.server_activate()

2088

3397

2089

3398

# Find out what port we got

2090

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

3399

if zeroconf:

3400

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

2091

3401

if use_ipv6:

2092

3402

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

2093

" flowinfo %d, scope_id %d"

2094

% tcp_server.socket.getsockname())

3403

" flowinfo %d, scope_id %d",

3404

*tcp_server.socket.getsockname())

2095

3405

else: # IPv4

2096

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

2097

% tcp_server.socket.getsockname())

3406

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

3407

*tcp_server.socket.getsockname())

2098

3408

2099

3409

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

2100

3410

2101

3411

try:

2102

# From the Avahi example code

2103

try:

2104

service.activate()

2105

except dbus.exceptions.DBusException as error:

2106

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

2107

cleanup()

2108

sys.exit(1)

2109

# End of Avahi example code

3412

if zeroconf:

3413

# From the Avahi example code

3414

try:

3415

service.activate()

3416

except dbus.exceptions.DBusException as error:

3417

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

3418

cleanup()

3419

sys.exit(1)

3420

# End of Avahi example code

2110

3421

2111

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

2112

lambda *args, **kwargs:

2113

(tcp_server.handle_request

2114

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

3422

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

3423

lambda *args, **kwargs:

3424

(tcp_server.handle_request

3425

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

2115

3426

2116

3427

logger.debug("Starting main loop")

2117

3428

main_loop.run()

2118

3429

except AvahiError as error:

2119

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

3430

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

2120

3431

cleanup()

2121

3432

sys.exit(1)

2122

3433

except KeyboardInterrupt:

2127

3438

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

2128

3439

cleanup()

2129

3440

3441

2130

3442

if __name__ == '__main__':

2131

3443

main()