/mandos/trunk : revision 237.4.75

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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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import xml.dom.minidom

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import inspect

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# Try to find the value of SO_BINDTODEVICE:

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try:

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

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

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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

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# Try running the C preprocessor:

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try:

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

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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

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

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.7"

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

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

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

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

259

with tempfile.NamedTemporaryFile(

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dir = self.tempdir) as passfile:

261

passfile.write(passphrase)

262

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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299

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300

class AvahiError(Exception):

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301

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

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302

self.value = value

107

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

108

def __unicode__(self):

109

return unicode(repr(self.value))

303

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

304

**kwargs)

305

110

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111

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class AvahiServiceError(AvahiError):

112

308

pass

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309

310

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class AvahiGroupError(AvahiError):

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pass

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123

320

Used to optionally bind to the specified interface.

124

321

name: string; Example: 'Mandos'

125

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

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

323

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

129

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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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334

"""

138

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):

335

336

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

143

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self.name = name

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349

self.type = servicetype

153

358

self.server = None

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359

self.bus = bus

155

360

self.entry_group_state_changed_match = None

156

def rename(self):

361

362

def rename(self, remove=True):

157

363

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

158

364

if self.rename_count >= self.max_renames:

159

365

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

160

366

" after %i retries, exiting.",

161

367

self.rename_count)

162

368

raise AvahiServiceError("Too many renames")

163

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

369

self.name = str(

370

self.server.GetAlternativeServiceName(self.name))

371

self.rename_count += 1

164

372

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

165

373

self.name)

166

syslogger.setFormatter(logging.Formatter

167

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

168

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

169

% self.name))

170

self.remove()

374

if remove:

375

self.remove()

171

376

try:

172

377

self.add()

173

378

except dbus.exceptions.DBusException as error:

174

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

175

self.cleanup()

176

os._exit(1)

177

self.rename_count += 1

379

if (error.get_dbus_name()

380

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

381

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

382

return self.rename(remove=False)

383

else:

384

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

385

self.cleanup()

386

os._exit(1)

387

178

388

def remove(self):

179

389

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

180

390

if self.entry_group_state_changed_match is not None:

182

392

self.entry_group_state_changed_match = None

183

393

if self.group is not None:

184

394

self.group.Reset()

395

185

396

def add(self):

186

397

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

187

398

self.remove()

192

403

avahi.DBUS_INTERFACE_ENTRY_GROUP)

193

404

self.entry_group_state_changed_match = (

194

405

self.group.connect_to_signal(

195

'StateChanged', self .entry_group_state_changed))

406

'StateChanged', self.entry_group_state_changed))

196

407

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

197

408

self.name, self.type)

198

409

self.group.AddService(

204

415

dbus.UInt16(self.port),

205

416

avahi.string_array_to_txt_array(self.TXT))

206

417

self.group.Commit()

418

207

419

def entry_group_state_changed(self, state, error):

208

420

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

209

421

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

215

427

self.rename()

216

428

elif state == avahi.ENTRY_GROUP_FAILURE:

217

429

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

218

unicode(error))

219

raise AvahiGroupError("State changed: %s"

220

% unicode(error))

430

str(error))

431

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

432

221

433

def cleanup(self):

222

434

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

223

435

if self.group is not None:

224

436

try:

225

437

self.group.Free()

226

438

except (dbus.exceptions.UnknownMethodException,

227

dbus.exceptions.DBusException) as e:

439

dbus.exceptions.DBusException):

228

440

pass

229

441

self.group = None

230

442

self.remove()

443

231

444

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

232

445

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

233

446

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

234

bad_states = { avahi.SERVER_INVALID:

235

"Zeroconf server invalid",

236

avahi.SERVER_REGISTERING: None,

237

avahi.SERVER_COLLISION:

238

"Zeroconf server name collision",

239

avahi.SERVER_FAILURE:

240

"Zeroconf server failure" }

447

bad_states = {

448

avahi.SERVER_INVALID: "Zeroconf server invalid",

449

avahi.SERVER_REGISTERING: None,

450

avahi.SERVER_COLLISION: "Zeroconf server name collision",

451

avahi.SERVER_FAILURE: "Zeroconf server failure",

452

}

241

453

if state in bad_states:

242

454

if bad_states[state] is not None:

243

455

if error is None:

246

458

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

247

459

self.cleanup()

248

460

elif state == avahi.SERVER_RUNNING:

249

self.add()

461

try:

462

self.add()

463

except dbus.exceptions.DBusException as error:

464

if (error.get_dbus_name()

465

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

466

logger.info("Local Zeroconf service name"

467

" collision.")

468

return self.rename(remove=False)

469

else:

470

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

471

self.cleanup()

472

os._exit(1)

250

473

else:

251

474

if error is None:

252

475

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

253

476

else:

254

477

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

478

255

479

def activate(self):

256

480

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

257

481

if self.server is None:

261

485

follow_name_owner_changes=True),

262

486

avahi.DBUS_INTERFACE_SERVER)

263

487

self.server.connect_to_signal("StateChanged",

264

self.server_state_changed)

488

self.server_state_changed)

265

489

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

266

490

267

491

268

def _timedelta_to_milliseconds(td):

269

"Convert a datetime.timedelta() to milliseconds"

270

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

271

+ (td.seconds * 1000)

272

+ (td.microseconds // 1000))

273

492

class AvahiServiceToSyslog(AvahiService):

493

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

494

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

495

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

496

syslogger.setFormatter(logging.Formatter(

497

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

498

.format(self.name)))

499

return ret

500

501

# Pretend that we have a GnuTLS module

502

class GnuTLS(object):

503

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

504

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

505

506

_library = ctypes.cdll.LoadLibrary(

507

ctypes.util.find_library("gnutls"))

508

_need_version = b"3.3.0"

509

def __init__(self):

510

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

511

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

512

# happens.

513

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

514

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

515

.format(self._need_version))

516

517

# Unless otherwise indicated, the constants and types below are

518

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

519

520

# Constants

521

E_SUCCESS = 0

522

E_INTERRUPTED = -52

523

E_AGAIN = -28

524

CRT_OPENPGP = 2

525

CLIENT = 2

526

SHUT_RDWR = 0

527

CRD_CERTIFICATE = 1

528

E_NO_CERTIFICATE_FOUND = -49

529

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

530

531

# Types

532

class session_int(ctypes.Structure):

533

_fields_ = []

534

session_t = ctypes.POINTER(session_int)

535

class certificate_credentials_st(ctypes.Structure):

536

_fields_ = []

537

certificate_credentials_t = ctypes.POINTER(

538

certificate_credentials_st)

539

certificate_type_t = ctypes.c_int

540

class datum_t(ctypes.Structure):

541

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

542

('size', ctypes.c_uint)]

543

class openpgp_crt_int(ctypes.Structure):

544

_fields_ = []

545

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

546

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

547

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

548

credentials_type_t = ctypes.c_int

549

transport_ptr_t = ctypes.c_void_p

550

close_request_t = ctypes.c_int

551

552

# Exceptions

553

class Error(Exception):

554

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

555

# exception might be raised from within GnuTLS.__init__,

556

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

557

# global variable has happened.

558

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

559

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

560

# code is passed, convert it to a string with

561

# gnutls.strerror()

562

self.code = code

563

if message is None and code is not None:

564

message = GnuTLS.strerror(code)

565

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

566

message, *args)

567

568

class CertificateSecurityError(Error):

569

pass

570

571

# Classes

572

class Credentials(object):

573

def __init__(self):

574

self._c_object = gnutls.certificate_credentials_t()

575

gnutls.certificate_allocate_credentials(

576

ctypes.byref(self._c_object))

577

self.type = gnutls.CRD_CERTIFICATE

578

579

def __del__(self):

580

gnutls.certificate_free_credentials(self._c_object)

581

582

class ClientSession(object):

583

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

584

self._c_object = gnutls.session_t()

585

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

586

gnutls.set_default_priority(self._c_object)

587

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

588

gnutls.handshake_set_private_extensions(self._c_object,

589

True)

590

self.socket = socket

591

if credentials is None:

592

credentials = gnutls.Credentials()

593

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

594

ctypes.cast(credentials._c_object,

595

ctypes.c_void_p))

596

self.credentials = credentials

597

598

def __del__(self):

599

gnutls.deinit(self._c_object)

600

601

def handshake(self):

602

return gnutls.handshake(self._c_object)

603

604

def send(self, data):

605

data = bytes(data)

606

data_len = len(data)

607

while data_len > 0:

608

data_len -= gnutls.record_send(self._c_object,

609

data[-data_len:],

610

data_len)

611

612

def bye(self):

613

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

614

615

# Error handling functions

616

def _error_code(result):

617

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

618

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

619

if result >= 0:

620

return result

621

if result == gnutls.E_NO_CERTIFICATE_FOUND:

622

raise gnutls.CertificateSecurityError(code = result)

623

raise gnutls.Error(code = result)

624

625

def _retry_on_error(result, func, arguments):

626

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

627

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

628

while result < 0:

629

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

630

return _error_code(result)

631

result = func(*arguments)

632

return result

633

634

# Unless otherwise indicated, the function declarations below are

635

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

636

637

# Functions

638

priority_set_direct = _library.gnutls_priority_set_direct

639

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

640

ctypes.POINTER(ctypes.c_char_p)]

641

priority_set_direct.restype = _error_code

642

643

init = _library.gnutls_init

644

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

645

init.restype = _error_code

646

647

set_default_priority = _library.gnutls_set_default_priority

648

set_default_priority.argtypes = [session_t]

649

set_default_priority.restype = _error_code

650

651

record_send = _library.gnutls_record_send

652

record_send.argtypes = [session_t, ctypes.c_void_p,

653

ctypes.c_size_t]

654

record_send.restype = ctypes.c_ssize_t

655

record_send.errcheck = _retry_on_error

656

657

certificate_allocate_credentials = (

658

_library.gnutls_certificate_allocate_credentials)

659

certificate_allocate_credentials.argtypes = [

660

ctypes.POINTER(certificate_credentials_t)]

661

certificate_allocate_credentials.restype = _error_code

662

663

certificate_free_credentials = (

664

_library.gnutls_certificate_free_credentials)

665

certificate_free_credentials.argtypes = [certificate_credentials_t]

666

certificate_free_credentials.restype = None

667

668

handshake_set_private_extensions = (

669

_library.gnutls_handshake_set_private_extensions)

670

handshake_set_private_extensions.argtypes = [session_t,

671

ctypes.c_int]

672

handshake_set_private_extensions.restype = None

673

674

credentials_set = _library.gnutls_credentials_set

675

credentials_set.argtypes = [session_t, credentials_type_t,

676

ctypes.c_void_p]

677

credentials_set.restype = _error_code

678

679

strerror = _library.gnutls_strerror

680

strerror.argtypes = [ctypes.c_int]

681

strerror.restype = ctypes.c_char_p

682

683

certificate_type_get = _library.gnutls_certificate_type_get

684

certificate_type_get.argtypes = [session_t]

685

certificate_type_get.restype = _error_code

686

687

certificate_get_peers = _library.gnutls_certificate_get_peers

688

certificate_get_peers.argtypes = [session_t,

689

ctypes.POINTER(ctypes.c_uint)]

690

certificate_get_peers.restype = ctypes.POINTER(datum_t)

691

692

global_set_log_level = _library.gnutls_global_set_log_level

693

global_set_log_level.argtypes = [ctypes.c_int]

694

global_set_log_level.restype = None

695

696

global_set_log_function = _library.gnutls_global_set_log_function

697

global_set_log_function.argtypes = [log_func]

698

global_set_log_function.restype = None

699

700

deinit = _library.gnutls_deinit

701

deinit.argtypes = [session_t]

702

deinit.restype = None

703

704

handshake = _library.gnutls_handshake

705

handshake.argtypes = [session_t]

706

handshake.restype = _error_code

707

handshake.errcheck = _retry_on_error

708

709

transport_set_ptr = _library.gnutls_transport_set_ptr

710

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

711

transport_set_ptr.restype = None

712

713

bye = _library.gnutls_bye

714

bye.argtypes = [session_t, close_request_t]

715

bye.restype = _error_code

716

bye.errcheck = _retry_on_error

717

718

check_version = _library.gnutls_check_version

719

check_version.argtypes = [ctypes.c_char_p]

720

check_version.restype = ctypes.c_char_p

721

722

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

723

724

openpgp_crt_init = _library.gnutls_openpgp_crt_init

725

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

726

openpgp_crt_init.restype = _error_code

727

728

openpgp_crt_import = _library.gnutls_openpgp_crt_import

729

openpgp_crt_import.argtypes = [openpgp_crt_t,

730

ctypes.POINTER(datum_t),

731

openpgp_crt_fmt_t]

732

openpgp_crt_import.restype = _error_code

733

734

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

735

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

736

ctypes.POINTER(ctypes.c_uint)]

737

openpgp_crt_verify_self.restype = _error_code

738

739

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

740

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

741

openpgp_crt_deinit.restype = None

742

743

openpgp_crt_get_fingerprint = (

744

_library.gnutls_openpgp_crt_get_fingerprint)

745

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

746

ctypes.c_void_p,

747

ctypes.POINTER(

748

ctypes.c_size_t)]

749

openpgp_crt_get_fingerprint.restype = _error_code

750

751

# Remove non-public functions

752

del _error_code, _retry_on_error

753

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

754

gnutls = GnuTLS()

755

756

def call_pipe(connection, # : multiprocessing.Connection

757

func, *args, **kwargs):

758

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

759

760

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

761

return value on the provided multiprocessing.Connection.

762

"""

763

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

764

connection.close()

765

274

766

class Client(object):

275

767

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

276

768

277

769

Attributes:

278

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

770

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

279

771

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

280

772

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

281

773

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

282

774

to see if the client lives.

283

775

'None' if no process is running.

284

checker_callback_tag: a gobject event source tag, or None

776

checker_callback_tag: a GLib event source tag, or None

285

777

checker_command: string; External command which is run to check

286

778

if client lives. %() expansions are done at

287

779

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

288

780

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

289

checker_initiator_tag: a gobject event source tag, or None

781

checker_initiator_tag: a GLib event source tag, or None

290

782

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

783

client_structure: Object describing what attributes a client has

784

and is used for storing the client at exit

291

785

current_checker_command: string; current running checker_command

292

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

293

disable_initiator_tag: a gobject event source tag, or None

786

disable_initiator_tag: a GLib event source tag, or None

294

787

enabled: bool()

295

788

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

296

789

uniquely identify the client

298

791

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

299

792

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

300

793

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

301

last_enabled: datetime.datetime(); (UTC)

794

last_checker_status: integer between 0 and 255 reflecting exit

795

status of last checker. -1 reflects crashed

796

checker, -2 means no checker completed yet.

797

last_checker_signal: The signal which killed the last checker, if

798

last_checker_status is -1

799

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

302

800

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

303

801

D-Bus identifiers

304

802

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

305

803

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

306

804

until this client is disabled

307

extended_timeout: extra long timeout when password has been sent

805

extended_timeout: extra long timeout when secret has been sent

308

806

runtime_expansions: Allowed attributes for runtime expansion.

309

807

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

310

808

disabled, or None

809

server_settings: The server_settings dict from main()

311

810

"""

312

811

313

812

runtime_expansions = ("approval_delay", "approval_duration",

314

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

315

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

813

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

814

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

815

"last_approval_request", "last_checked_ok",

316

816

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

317

318

def timeout_milliseconds(self):

319

"Return the 'timeout' attribute in milliseconds"

320

return _timedelta_to_milliseconds(self.timeout)

321

322

def extended_timeout_milliseconds(self):

323

"Return the 'extended_timeout' attribute in milliseconds"

324

return _timedelta_to_milliseconds(self.extended_timeout)

325

326

def interval_milliseconds(self):

327

"Return the 'interval' attribute in milliseconds"

328

return _timedelta_to_milliseconds(self.interval)

329

330

def approval_delay_milliseconds(self):

331

return _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."""

817

client_defaults = {

818

"timeout": "PT5M",

819

"extended_timeout": "PT15M",

820

"interval": "PT2M",

821

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

822

"host": "",

823

"approval_delay": "PT0S",

824

"approval_duration": "PT1S",

825

"approved_by_default": "True",

826

"enabled": "True",

827

}

828

829

@staticmethod

830

def config_parser(config):

831

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

832

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

833

with exceptions for any special settings as defined above.

834

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

835

value given the same arguments.

836

"""

837

settings = {}

838

for client_name in config.sections():

839

section = dict(config.items(client_name))

840

client = settings[client_name] = {}

841

842

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

843

# Reformat values from string types to Python types

844

client["approved_by_default"] = config.getboolean(

845

client_name, "approved_by_default")

846

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

847

"enabled")

848

849

# Uppercase and remove spaces from fingerprint for later

850

# comparison purposes with return value from the

851

# fingerprint() function

852

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

853

.replace(" ", ""))

854

if "secret" in section:

855

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

856

.encode("utf-8"),

857

"base64")

858

elif "secfile" in section:

859

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

860

(section["secfile"])),

861

"rb") as secfile:

862

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

863

else:

864

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

865

.format(section))

866

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

867

client["extended_timeout"] = string_to_delta(

868

section["extended_timeout"])

869

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

870

client["approval_delay"] = string_to_delta(

871

section["approval_delay"])

872

client["approval_duration"] = string_to_delta(

873

section["approval_duration"])

874

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

875

client["last_approval_request"] = None

876

client["last_checked_ok"] = None

877

client["last_checker_status"] = -2

878

879

return settings

880

881

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

337

882

self.name = name

338

if config is None:

339

config = {}

883

if server_settings is None:

884

server_settings = {}

885

self.server_settings = server_settings

886

# adding all client settings

887

for setting, value in settings.items():

888

setattr(self, setting, value)

889

890

if self.enabled:

891

if not hasattr(self, "last_enabled"):

892

self.last_enabled = datetime.datetime.utcnow()

893

if not hasattr(self, "expires"):

894

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

895

+ self.timeout)

896

else:

897

self.last_enabled = None

898

self.expires = None

899

340

900

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

901

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

902

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

903

datetime.datetime.utcnow())

904

905

# attributes specific for this server instance

367

906

self.checker = None

368

907

self.checker_initiator_tag = None

369

908

self.disable_initiator_tag = None

370

self.expires = None

371

909

self.checker_callback_tag = None

372

self.checker_command = config["checker"]

373

910

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)

911

self.approved = None

378

912

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())

913

self.changedstate = multiprocessing_manager.Condition(

914

multiprocessing_manager.Lock())

915

self.client_structure = [attr

916

for attr in self.__dict__.keys()

917

if not attr.startswith("_")]

918

self.client_structure.append("client_structure")

919

920

for name, t in inspect.getmembers(

921

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

922

if not name.startswith("_"):

923

self.client_structure.append(name)

384

924

925

# Send notice to process children that client state has changed

385

926

def send_changedstate(self):

386

self.changedstate.acquire()

387

self.changedstate.notify_all()

388

self.changedstate.release()

389

927

with self.changedstate:

928

self.changedstate.notify_all()

929

390

930

def enable(self):

391

931

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

392

932

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

393

933

# Already enabled

394

934

return

395

self.send_changedstate()

396

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

397

# and every interval from then on.

398

self.checker_initiator_tag = (gobject.timeout_add

399

(self.interval_milliseconds(),

400

self.start_checker))

401

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

402

935

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

403

self.disable_initiator_tag = (gobject.timeout_add

404

(self.timeout_milliseconds(),

405

self.disable))

406

936

self.enabled = True

407

937

self.last_enabled = datetime.datetime.utcnow()

408

# Also start a new checker *right now*.

409

self.start_checker()

938

self.init_checker()

939

self.send_changedstate()

410

940

411

941

def disable(self, quiet=True):

412

942

"""Disable this client."""

413

943

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

414

944

return False

415

945

if not quiet:

416

self.send_changedstate()

417

if not quiet:

418

946

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

419

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

420

gobject.source_remove(self.disable_initiator_tag)

947

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

948

GLib.source_remove(self.disable_initiator_tag)

421

949

self.disable_initiator_tag = None

422

950

self.expires = None

423

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

424

gobject.source_remove(self.checker_initiator_tag)

951

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

952

GLib.source_remove(self.checker_initiator_tag)

425

953

self.checker_initiator_tag = None

426

954

self.stop_checker()

427

if self.disable_hook:

428

self.disable_hook(self)

429

955

self.enabled = False

430

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

956

if not quiet:

957

self.send_changedstate()

958

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

431

959

return False

432

960

433

961

def __del__(self):

434

self.disable_hook = None

435

962

self.disable()

436

963

437

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

964

def init_checker(self):

965

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

966

# and every interval from then on.

967

if self.checker_initiator_tag is not None:

968

GLib.source_remove(self.checker_initiator_tag)

969

self.checker_initiator_tag = GLib.timeout_add(

970

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

971

self.start_checker)

972

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

973

if self.disable_initiator_tag is not None:

974

GLib.source_remove(self.disable_initiator_tag)

975

self.disable_initiator_tag = GLib.timeout_add(

976

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

977

# Also start a new checker *right now*.

978

self.start_checker()

979

980

def checker_callback(self, source, condition, connection,

981

command):

438

982

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

439

983

self.checker_callback_tag = None

440

984

self.checker = None

441

if os.WIFEXITED(condition):

442

exitstatus = os.WEXITSTATUS(condition)

443

if exitstatus == 0:

985

# Read return code from connection (see call_pipe)

986

returncode = connection.recv()

987

connection.close()

988

989

if returncode >= 0:

990

self.last_checker_status = returncode

991

self.last_checker_signal = None

992

if self.last_checker_status == 0:

444

993

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

445

994

vars(self))

446

995

self.checked_ok()

447

996

else:

448

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

449

vars(self))

997

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

450

998

else:

999

self.last_checker_status = -1

1000

self.last_checker_signal = -returncode

451

1001

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

452

1002

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

"""

1003

return False

1004

1005

def checked_ok(self):

1006

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

1007

self.last_checked_ok = datetime.datetime.utcnow()

1008

self.last_checker_status = 0

1009

self.last_checker_signal = None

1010

self.bump_timeout()

1011

1012

def bump_timeout(self, timeout=None):

1013

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

460

1014

if timeout is None:

461

1015

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

(_timedelta_to_milliseconds(timeout),

467

self.disable))

1016

if self.disable_initiator_tag is not None:

1017

GLib.source_remove(self.disable_initiator_tag)

1018

self.disable_initiator_tag = None

1019

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

1020

self.disable_initiator_tag = GLib.timeout_add(

1021

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

1022

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

468

1023

469

1024

def need_approval(self):

470

1025

self.last_approval_request = datetime.datetime.utcnow()

475

1030

If a checker already exists, leave it running and do

476

1031

nothing."""

477

1032

# 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

1033

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

1034

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

1035

# would inevitably timeout, since no checker would get a

1036

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

482

1037

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

483

1038

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

484

1039

# should be.

485

1040

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)

1041

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

1042

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

1043

self.checker.join()

1044

self.checker = None

499

1045

# Start a new checker if needed

500

1046

if self.checker is None:

1047

# Escape attributes for the shell

1048

escaped_attrs = {

1049

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

1050

for attr in self.runtime_expansions }

501

1051

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

1052

command = self.checker_command % escaped_attrs

1053

except TypeError as error:

1054

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

1055

self.checker_command,

1056

exc_info=error)

1057

return True # Try again later

520

1058

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

1059

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

1060

self.name)

1061

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

1062

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

1063

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

1064

# always replaced by /dev/null.)

1065

# The exception is when not debugging but nevertheless

1066

# running in the foreground; use the previously

1067

# created wnull.

1068

popen_args = { "close_fds": True,

1069

"shell": True,

1070

"cwd": "/" }

1071

if (not self.server_settings["debug"]

1072

and self.server_settings["foreground"]):

1073

popen_args.update({"stdout": wnull,

1074

"stderr": wnull })

1075

pipe = multiprocessing.Pipe(duplex = False)

1076

self.checker = multiprocessing.Process(

1077

target = call_pipe,

1078

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

1079

kwargs = popen_args)

1080

self.checker.start()

1081

self.checker_callback_tag = GLib.io_add_watch(

1082

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

1083

self.checker_callback, pipe[0], command)

1084

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

545

1085

return True

546

1086

547

1087

def stop_checker(self):

548

1088

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

549

1089

if self.checker_callback_tag:

550

gobject.source_remove(self.checker_callback_tag)

1090

GLib.source_remove(self.checker_callback_tag)

551

1091

self.checker_callback_tag = None

552

1092

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

553

1093

return

554

1094

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

1095

self.checker.terminate()

563

1096

self.checker = None

564

1097

565

1098

566

def dbus_service_property(dbus_interface, signature="v",

567

access="readwrite", byte_arrays=False):

1099

def dbus_service_property(dbus_interface,

1100

signature="v",

1101

access="readwrite",

1102

byte_arrays=False):

568

1103

"""Decorators for marking methods of a DBusObjectWithProperties to

569

1104

become properties on the D-Bus.

570

1105

579

1114

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

580

1115

if byte_arrays and signature != "ay":

581

1116

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

582

" signature %r" % signature)

1117

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

1118

583

1119

def decorator(func):

584

1120

func._dbus_is_property = True

585

1121

func._dbus_interface = dbus_interface

590

1126

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

591

1127

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

592

1128

return func

1129

1130

return decorator

1131

1132

1133

def dbus_interface_annotations(dbus_interface):

1134

"""Decorator for marking functions returning interface annotations

1135

1136

Usage:

1137

1138

@dbus_interface_annotations("org.example.Interface")

1139

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

1140

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

1141

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

1142

"false"}

1143

"""

1144

1145

def decorator(func):

1146

func._dbus_is_interface = True

1147

func._dbus_interface = dbus_interface

1148

func._dbus_name = dbus_interface

1149

return func

1150

1151

return decorator

1152

1153

1154

def dbus_annotations(annotations):

1155

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

1156

Usage:

1157

1158

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

1159

"org.freedesktop.DBus.Property."

1160

"EmitsChangedSignal": "false"})

1161

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

1162

access="r")

1163

def Property_dbus_property(self):

1164

return dbus.Boolean(False)

1165

1166

See also the DBusObjectWithAnnotations class.

1167

"""

1168

1169

def decorator(func):

1170

func._dbus_annotations = annotations

1171

return func

1172

593

1173

return decorator

594

1174

595

1175

596

1176

class DBusPropertyException(dbus.exceptions.DBusException):

597

1177

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

598

1178

"""

599

def __unicode__(self):

600

return unicode(str(self))

1179

pass

601

1180

602

1181

603

1182

class DBusPropertyAccessException(DBusPropertyException):

612

1191

pass

613

1192

614

1193

615

class DBusObjectWithProperties(dbus.service.Object):

1194

class DBusObjectWithAnnotations(dbus.service.Object):

1195

"""A D-Bus object with annotations.

1196

1197

Classes inheriting from this can use the dbus_annotations

1198

decorator to add annotations to methods or signals.

1199

"""

1200

1201

@staticmethod

1202

def _is_dbus_thing(thing):

1203

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

1204

1205

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

1206

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

1207

"""

1208

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

1209

False)

1210

1211

def _get_all_dbus_things(self, thing):

1212

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

1213

"""

1214

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

1215

athing.__get__(self))

1216

for cls in self.__class__.__mro__

1217

for name, athing in

1218

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

1219

1220

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1221

out_signature = "s",

1222

path_keyword = 'object_path',

1223

connection_keyword = 'connection')

1224

def Introspect(self, object_path, connection):

1225

"""Overloading of standard D-Bus method.

1226

1227

Inserts annotation tags on methods and signals.

1228

"""

1229

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

1230

connection)

1231

try:

1232

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

1233

1234

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

1235

# Add annotation tags

1236

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

1237

for tag in if_tag.getElementsByTagName(typ):

1238

annots = dict()

1239

for name, prop in (self.

1240

_get_all_dbus_things(typ)):

1241

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

1242

and prop._dbus_interface

1243

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

1244

annots.update(getattr(

1245

prop, "_dbus_annotations", {}))

1246

for name, value in annots.items():

1247

ann_tag = document.createElement(

1248

"annotation")

1249

ann_tag.setAttribute("name", name)

1250

ann_tag.setAttribute("value", value)

1251

tag.appendChild(ann_tag)

1252

# Add interface annotation tags

1253

for annotation, value in dict(

1254

itertools.chain.from_iterable(

1255

annotations().items()

1256

for name, annotations

1257

in self._get_all_dbus_things("interface")

1258

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

1259

)).items():

1260

ann_tag = document.createElement("annotation")

1261

ann_tag.setAttribute("name", annotation)

1262

ann_tag.setAttribute("value", value)

1263

if_tag.appendChild(ann_tag)

1264

# Fix argument name for the Introspect method itself

1265

if (if_tag.getAttribute("name")

1266

== dbus.INTROSPECTABLE_IFACE):

1267

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

1268

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

1269

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

1270

if (arg.getAttribute("direction")

1271

== "out"):

1272

arg.setAttribute("name",

1273

"xml_data")

1274

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

1275

document.unlink()

1276

except (AttributeError, xml.dom.DOMException,

1277

xml.parsers.expat.ExpatError) as error:

1278

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

1279

exc_info=error)

1280

return xmlstring

1281

1282

1283

class DBusObjectWithProperties(DBusObjectWithAnnotations):

616

1284

"""A D-Bus object with properties.

617

1285

618

1286

Classes inheriting from this can use the dbus_service_property

620

1288

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

621

1289

"""

622

1290

623

@staticmethod

624

def _is_dbus_property(obj):

625

return getattr(obj, "_dbus_is_property", False)

626

627

def _get_all_dbus_properties(self):

628

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

629

"""

630

return ((prop.__get__(self)._dbus_name, prop.__get__(self))

631

for cls in self.__class__.__mro__

632

for name, prop in inspect.getmembers(cls, self._is_dbus_property))

633

634

1291

def _get_dbus_property(self, interface_name, property_name):

635

1292

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

636

1293

property with the specified name and interface.

637

1294

"""

638

for cls in self.__class__.__mro__:

639

for name, value in inspect.getmembers(cls, self._is_dbus_property):

640

if value._dbus_name == property_name and value._dbus_interface == interface_name:

1295

for cls in self.__class__.__mro__:

1296

for name, value in inspect.getmembers(

1297

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

1298

if (value._dbus_name == property_name

1299

and value._dbus_interface == interface_name):

641

1300

return value.__get__(self)

642

1301

643

1302

# No such property

644

raise DBusPropertyNotFound(self.dbus_object_path + ":"

645

+ interface_name + "."

646

+ property_name)

647

648

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

1303

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

1304

self.dbus_object_path, interface_name, property_name))

1305

1306

@classmethod

1307

def _get_all_interface_names(cls):

1308

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

1309

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

1310

"_dbus_interface", None)

1311

for x in (inspect.getmro(cls))

1312

for attr in dir(x))

1313

if name is not None)

1314

1315

@dbus.service.method(dbus.PROPERTIES_IFACE,

1316

in_signature="ss",

649

1317

out_signature="v")

650

1318

def Get(self, interface_name, property_name):

651

1319

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

669

1337

# The byte_arrays option is not supported yet on

670

1338

# signatures other than "ay".

671

1339

if prop._dbus_signature != "ay":

672

raise ValueError

673

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

674

for byte in value))

1340

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

1341

"'ay' signature {!r}"

1342

.format(prop._dbus_signature))

1343

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

1344

for byte in value))

675

1345

prop(value)

676

1346

677

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

1347

@dbus.service.method(dbus.PROPERTIES_IFACE,

1348

in_signature="s",

678

1349

out_signature="a{sv}")

679

1350

def GetAll(self, interface_name):

680

1351

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

682

1353

683

1354

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

684

1355

"""

685

all = {}

686

for name, prop in self._get_all_dbus_properties():

1356

properties = {}

1357

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

687

1358

if (interface_name

688

1359

and interface_name != prop._dbus_interface):

689

1360

# Interface non-empty but did not match

693

1364

continue

694

1365

value = prop()

695

1366

if not hasattr(value, "variant_level"):

696

all[name] = value

1367

properties[name] = value

697

1368

continue

698

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

699

value.variant_level+1)

700

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

1369

properties[name] = type(value)(

1370

value, variant_level = value.variant_level + 1)

1371

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

1372

1373

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

1374

def PropertiesChanged(self, interface_name, changed_properties,

1375

invalidated_properties):

1376

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

1377

standard.

1378

"""

1379

pass

701

1380

702

1381

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

703

1382

out_signature="s",

704

1383

path_keyword='object_path',

705

1384

connection_keyword='connection')

706

1385

def Introspect(self, object_path, connection):

707

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

1386

"""Overloading of standard D-Bus method.

1387

1388

Inserts property tags and interface annotation tags.

708

1389

"""

709

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

710

connection)

1390

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1391

object_path,

1392

connection)

711

1393

try:

712

1394

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

1395

713

1396

def make_tag(document, name, prop):

714

1397

e = document.createElement("property")

715

1398

e.setAttribute("name", name)

716

1399

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

717

1400

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

718

1401

return e

1402

719

1403

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

1404

# Add property tags

720

1405

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

721

1406

for name, prop

722

in self._get_all_dbus_properties()

1407

in self._get_all_dbus_things("property")

723

1408

if prop._dbus_interface

724

1409

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

725

1410

if_tag.appendChild(tag)

1411

# Add annotation tags for properties

1412

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

1413

annots = dict()

1414

for name, prop in self._get_all_dbus_things(

1415

"property"):

1416

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

1417

and prop._dbus_interface

1418

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

1419

annots.update(getattr(

1420

prop, "_dbus_annotations", {}))

1421

for name, value in annots.items():

1422

ann_tag = document.createElement(

1423

"annotation")

1424

ann_tag.setAttribute("name", name)

1425

ann_tag.setAttribute("value", value)

1426

tag.appendChild(ann_tag)

726

1427

# Add the names to the return values for the

727

1428

# "org.freedesktop.DBus.Properties" methods

728

1429

if (if_tag.getAttribute("name")

743

1444

except (AttributeError, xml.dom.DOMException,

744

1445

xml.parsers.expat.ExpatError) as error:

745

1446

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

746

error)

747

return xmlstring

748

749

750

def datetime_to_dbus (dt, variant_level=0):

1447

exc_info=error)

1448

return xmlstring

1449

1450

try:

1451

dbus.OBJECT_MANAGER_IFACE

1452

except AttributeError:

1453

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

1454

1455

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1456

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

1457

1458

Classes inheriting from this exposes the standard

1459

GetManagedObjects call and the InterfacesAdded and

1460

InterfacesRemoved signals on the standard

1461

"org.freedesktop.DBus.ObjectManager" interface.

1462

1463

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

1464

manually.

1465

"""

1466

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1467

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

1468

def GetManagedObjects(self):

1469

"""This function must be overridden"""

1470

raise NotImplementedError()

1471

1472

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1473

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

1474

def InterfacesAdded(self, object_path, interfaces_and_properties):

1475

pass

1476

1477

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

1478

def InterfacesRemoved(self, object_path, interfaces):

1479

pass

1480

1481

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1482

out_signature = "s",

1483

path_keyword = 'object_path',

1484

connection_keyword = 'connection')

1485

def Introspect(self, object_path, connection):

1486

"""Overloading of standard D-Bus method.

1487

1488

Override return argument name of GetManagedObjects to be

1489

"objpath_interfaces_and_properties"

1490

"""

1491

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1492

object_path,

1493

connection)

1494

try:

1495

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

1496

1497

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

1498

# Fix argument name for the GetManagedObjects method

1499

if (if_tag.getAttribute("name")

1500

== dbus.OBJECT_MANAGER_IFACE):

1501

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

1502

if (cn.getAttribute("name")

1503

== "GetManagedObjects"):

1504

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

1505

if (arg.getAttribute("direction")

1506

== "out"):

1507

arg.setAttribute(

1508

"name",

1509

"objpath_interfaces"

1510

"_and_properties")

1511

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

1512

document.unlink()

1513

except (AttributeError, xml.dom.DOMException,

1514

xml.parsers.expat.ExpatError) as error:

1515

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

1516

exc_info = error)

1517

return xmlstring

1518

1519

def datetime_to_dbus(dt, variant_level=0):

751

1520

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

752

1521

if dt is None:

753

1522

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

754

return dbus.String(dt.isoformat(),

755

variant_level=variant_level)

756

757

class transitional_dbus_metaclass(DBusObjectWithProperties.__metaclass__):

758

def __new__(mcs, name, bases, attr):

759

for attrname, old_dbusobj in inspect.getmembers(bases[0]):

760

new_interface = getattr(old_dbusobj, "_dbus_interface", "").replace("se.bsnet.fukt.", "se.recompile.")

761

if (getattr(old_dbusobj, "_dbus_is_signal", False)

762

and old_dbusobj._dbus_interface.startswith("se.bsnet.fukt.Mandos")):

763

unwrappedfunc = dict(zip(old_dbusobj.func_code.co_freevars,

764

old_dbusobj.__closure__))["func"].cell_contents

765

newfunc = types.FunctionType(unwrappedfunc.func_code,

766

unwrappedfunc.func_globals,

767

unwrappedfunc.func_name,

768

unwrappedfunc.func_defaults,

769

unwrappedfunc.func_closure)

770

new_dbusfunc = dbus.service.signal(

771

new_interface, old_dbusobj._dbus_signature)(newfunc)

772

attr["_transitional_" + attrname] = new_dbusfunc

773

774

def fixscope(func1, func2):

775

def newcall(*args, **kwargs):

776

func1(*args, **kwargs)

777

func2(*args, **kwargs)

778

return newcall

779

780

attr[attrname] = fixscope(old_dbusobj, new_dbusfunc)

781

782

elif (getattr(old_dbusobj, "_dbus_is_method", False)

783

and old_dbusobj._dbus_interface.startswith("se.bsnet.fukt.Mandos")):

784

new_dbusfunc = (dbus.service.method

785

(new_interface,

786

old_dbusobj._dbus_in_signature,

787

old_dbusobj._dbus_out_signature)

788

(types.FunctionType

789

(old_dbusobj.func_code,

790

old_dbusobj.func_globals,

791

old_dbusobj.func_name,

792

old_dbusobj.func_defaults,

793

old_dbusobj.func_closure)))

794

795

attr[attrname] = new_dbusfunc

796

elif (getattr(old_dbusobj, "_dbus_is_property", False)

797

and old_dbusobj._dbus_interface.startswith("se.bsnet.fukt.Mandos")):

798

new_dbusfunc = (dbus_service_property

799

(new_interface,

800

old_dbusobj._dbus_signature,

801

old_dbusobj._dbus_access,

802

old_dbusobj._dbus_get_args_options["byte_arrays"])

803

(types.FunctionType

804

(old_dbusobj.func_code,

805

old_dbusobj.func_globals,

806

old_dbusobj.func_name,

807

old_dbusobj.func_defaults,

808

old_dbusobj.func_closure)))

809

810

attr[attrname] = new_dbusfunc

811

return type.__new__(mcs, name, bases, attr)

812

1523

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

1524

1525

1526

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1527

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

1528

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

1529

interface names according to the "alt_interface_names" mapping.

1530

Usage:

1531

1532

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

1533

"net.example.AlternateInterface"})

1534

class SampleDBusObject(dbus.service.Object):

1535

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

1536

def SampleDBusMethod():

1537

pass

1538

1539

The above "SampleDBusMethod" on "SampleDBusObject" will be

1540

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

1541

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

1542

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

1543

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

1544

1545

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

1546

(from DBusObjectWithProperties) and interfaces (from the

1547

dbus_interface_annotations decorator).

1548

"""

1549

1550

def wrapper(cls):

1551

for orig_interface_name, alt_interface_name in (

1552

alt_interface_names.items()):

1553

attr = {}

1554

interface_names = set()

1555

# Go though all attributes of the class

1556

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

1557

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

1558

# with the wrong interface name

1559

if (not hasattr(attribute, "_dbus_interface")

1560

or not attribute._dbus_interface.startswith(

1561

orig_interface_name)):

1562

continue

1563

# Create an alternate D-Bus interface name based on

1564

# the current name

1565

alt_interface = attribute._dbus_interface.replace(

1566

orig_interface_name, alt_interface_name)

1567

interface_names.add(alt_interface)

1568

# Is this a D-Bus signal?

1569

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

1570

# Extract the original non-method undecorated

1571

# function by black magic

1572

if sys.version_info.major == 2:

1573

nonmethod_func = (dict(

1574

zip(attribute.func_code.co_freevars,

1575

attribute.__closure__))

1576

["func"].cell_contents)

1577

else:

1578

nonmethod_func = (dict(

1579

zip(attribute.__code__.co_freevars,

1580

attribute.__closure__))

1581

["func"].cell_contents)

1582

# Create a new, but exactly alike, function

1583

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

1584

# with the alternate D-Bus interface name

1585

new_function = copy_function(nonmethod_func)

1586

new_function = (dbus.service.signal(

1587

alt_interface,

1588

attribute._dbus_signature)(new_function))

1589

# Copy annotations, if any

1590

try:

1591

new_function._dbus_annotations = dict(

1592

attribute._dbus_annotations)

1593

except AttributeError:

1594

pass

1595

# Define a creator of a function to call both the

1596

# original and alternate functions, so both the

1597

# original and alternate signals gets sent when

1598

# the function is called

1599

def fixscope(func1, func2):

1600

"""This function is a scope container to pass

1601

func1 and func2 to the "call_both" function

1602

outside of its arguments"""

1603

1604

@functools.wraps(func2)

1605

def call_both(*args, **kwargs):

1606

"""This function will emit two D-Bus

1607

signals by calling func1 and func2"""

1608

func1(*args, **kwargs)

1609

func2(*args, **kwargs)

1610

# Make wrapper function look like a D-Bus signal

1611

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

1612

if name.startswith("_dbus_"):

1613

setattr(call_both, name, attr)

1614

1615

return call_both

1616

# Create the "call_both" function and add it to

1617

# the class

1618

attr[attrname] = fixscope(attribute, new_function)

1619

# Is this a D-Bus method?

1620

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

1621

# Create a new, but exactly alike, function

1622

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

1623

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

1624

# to the class.

1625

attr[attrname] = (

1626

dbus.service.method(

1627

alt_interface,

1628

attribute._dbus_in_signature,

1629

attribute._dbus_out_signature)

1630

(copy_function(attribute)))

1631

# Copy annotations, if any

1632

try:

1633

attr[attrname]._dbus_annotations = dict(

1634

attribute._dbus_annotations)

1635

except AttributeError:

1636

pass

1637

# Is this a D-Bus property?

1638

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

1639

# Create a new, but exactly alike, function

1640

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

1641

# property with the alternate D-Bus interface

1642

# name. Add it to the class.

1643

attr[attrname] = (dbus_service_property(

1644

alt_interface, attribute._dbus_signature,

1645

attribute._dbus_access,

1646

attribute._dbus_get_args_options

1647

["byte_arrays"])

1648

(copy_function(attribute)))

1649

# Copy annotations, if any

1650

try:

1651

attr[attrname]._dbus_annotations = dict(

1652

attribute._dbus_annotations)

1653

except AttributeError:

1654

pass

1655

# Is this a D-Bus interface?

1656

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

1657

# Create a new, but exactly alike, function

1658

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

1659

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

1660

# to the class.

1661

attr[attrname] = (

1662

dbus_interface_annotations(alt_interface)

1663

(copy_function(attribute)))

1664

if deprecate:

1665

# Deprecate all alternate interfaces

1666

iname="_AlternateDBusNames_interface_annotation{}"

1667

for interface_name in interface_names:

1668

1669

@dbus_interface_annotations(interface_name)

1670

def func(self):

1671

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

1672

"true" }

1673

# Find an unused name

1674

for aname in (iname.format(i)

1675

for i in itertools.count()):

1676

if aname not in attr:

1677

attr[aname] = func

1678

break

1679

if interface_names:

1680

# Replace the class with a new subclass of it with

1681

# methods, signals, etc. as created above.

1682

if sys.version_info.major == 2:

1683

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

1684

(cls, ), attr)

1685

else:

1686

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

1687

(cls, ), attr)

1688

return cls

1689

1690

return wrapper

1691

1692

1693

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

1694

"se.bsnet.fukt.Mandos"})

813

1695

class ClientDBus(Client, DBusObjectWithProperties):

814

1696

"""A Client class using D-Bus

815

1697

819

1701

"""

820

1702

821

1703

runtime_expansions = (Client.runtime_expansions

822

+ ("dbus_object_path",))

1704

+ ("dbus_object_path", ))

1705

1706

_interface = "se.recompile.Mandos.Client"

823

1707

824

1708

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

825

1709

826

1710

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

827

self._approvals_pending = 0

828

1711

self.bus = bus

829

1712

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

830

1713

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

831

1714

# the D-Bus

832

client_object_name = unicode(self.name).translate(

1715

client_object_name = str(self.name).translate(

833

1716

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

834

1717

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

835

self.dbus_object_path = (dbus.ObjectPath

836

("/clients/" + client_object_name))

1718

self.dbus_object_path = dbus.ObjectPath(

1719

"/clients/" + client_object_name)

837

1720

DBusObjectWithProperties.__init__(self, self.bus,

838

1721

self.dbus_object_path)

1722

1723

def notifychangeproperty(transform_func, dbus_name,

1724

type_func=lambda x: x,

1725

variant_level=1,

1726

invalidate_only=False,

1727

_interface=_interface):

1728

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

1729

its changes to DBus.

839

1730

840

def notifychangeproperty(transform_func,

841

dbus_name, type_func=lambda x: x,

842

variant_level=1):

843

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

844

changes to DBus.

845

transform_fun: Function that takes a value and transform it to

846

DBus type.

847

dbus_name: DBus name of the variable

1731

transform_fun: Function that takes a value and a variant_level

1732

and transforms it to a D-Bus type.

1733

dbus_name: D-Bus name of the variable

848

1734

type_func: Function that transform the value before sending it

849

to DBus

850

variant_level: DBus variant level. default: 1

1735

to the D-Bus. Default: no transform

1736

variant_level: D-Bus variant level. Default: 1

851

1737

"""

852

real_value = [None,]

1738

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

1739

853

1740

def setter(self, value):

854

old_value = real_value[0]

855

real_value[0] = value

856

1741

if hasattr(self, "dbus_object_path"):

857

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

858

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

859

variant_level)

860

self.PropertyChanged(dbus.String(dbus_name),

861

dbus_value)

1742

if (not hasattr(self, attrname) or

1743

type_func(getattr(self, attrname, None))

1744

!= type_func(value)):

1745

if invalidate_only:

1746

self.PropertiesChanged(

1747

_interface, dbus.Dictionary(),

1748

dbus.Array((dbus_name, )))

1749

else:

1750

dbus_value = transform_func(

1751

type_func(value),

1752

variant_level = variant_level)

1753

self.PropertyChanged(dbus.String(dbus_name),

1754

dbus_value)

1755

self.PropertiesChanged(

1756

_interface,

1757

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

1758

dbus_value }),

1759

dbus.Array())

1760

setattr(self, attrname, value)

862

1761

863

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

864

1762

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

865

1763

866

1764

expires = notifychangeproperty(datetime_to_dbus, "Expires")

867

1765

approvals_pending = notifychangeproperty(dbus.Boolean,

870

1768

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

871

1769

last_enabled = notifychangeproperty(datetime_to_dbus,

872

1770

"LastEnabled")

873

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

874

type_func = lambda checker: checker is not None)

1771

checker = notifychangeproperty(

1772

dbus.Boolean, "CheckerRunning",

1773

type_func = lambda checker: checker is not None)

875

1774

last_checked_ok = notifychangeproperty(datetime_to_dbus,

876

1775

"LastCheckedOK")

877

last_approval_request = notifychangeproperty(datetime_to_dbus,

878

"LastApprovalRequest")

1776

last_checker_status = notifychangeproperty(dbus.Int16,

1777

"LastCheckerStatus")

1778

last_approval_request = notifychangeproperty(

1779

datetime_to_dbus, "LastApprovalRequest")

879

1780

approved_by_default = notifychangeproperty(dbus.Boolean,

880

1781

"ApprovedByDefault")

881

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

882

type_func = _timedelta_to_milliseconds)

883

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

884

type_func = _timedelta_to_milliseconds)

1782

approval_delay = notifychangeproperty(

1783

dbus.UInt64, "ApprovalDelay",

1784

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

1785

approval_duration = notifychangeproperty(

1786

dbus.UInt64, "ApprovalDuration",

1787

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

885

1788

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

886

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

887

type_func = _timedelta_to_milliseconds)

888

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

889

type_func = _timedelta_to_milliseconds)

890

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

891

type_func = _timedelta_to_milliseconds)

1789

timeout = notifychangeproperty(

1790

dbus.UInt64, "Timeout",

1791

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

1792

extended_timeout = notifychangeproperty(

1793

dbus.UInt64, "ExtendedTimeout",

1794

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

1795

interval = notifychangeproperty(

1796

dbus.UInt64, "Interval",

1797

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

892

1798

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

1799

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

1800

invalidate_only=True)

893

1801

894

1802

del notifychangeproperty

895

1803

902

1810

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

903

1811

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

904

1812

905

def checker_callback(self, pid, condition, command,

906

*args, **kwargs):

907

self.checker_callback_tag = None

908

self.checker = None

909

if os.WIFEXITED(condition):

910

exitstatus = os.WEXITSTATUS(condition)

1813

def checker_callback(self, source, condition,

1814

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

1815

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

1816

connection, command, *args,

1817

**kwargs)

1818

exitstatus = self.last_checker_status

1819

if exitstatus >= 0:

911

1820

# Emit D-Bus signal

912

1821

self.CheckerCompleted(dbus.Int16(exitstatus),

913

dbus.Int64(condition),

1822

# This is specific to GNU libC

1823

dbus.Int64(exitstatus << 8),

914

1824

dbus.String(command))

915

1825

else:

916

1826

# Emit D-Bus signal

917

1827

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

918

dbus.Int64(condition),

1828

dbus.Int64(

1829

# This is specific to GNU libC

1830

(exitstatus << 8)

1831

| self.last_checker_signal),

919

1832

dbus.String(command))

920

921

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

922

*args, **kwargs)

1833

return ret

923

1834

924

1835

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

925

old_checker = self.checker

926

if self.checker is not None:

927

old_checker_pid = self.checker.pid

928

else:

929

old_checker_pid = None

1836

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

930

1837

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

931

1838

# Only if new checker process was started

932

1839

if (self.checker is not None

936

1843

return r

937

1844

938

1845

def _reset_approved(self):

939

self._approved = None

1846

self.approved = None

940

1847

return False

941

1848

942

1849

def approve(self, value=True):

1850

self.approved = value

1851

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

1852

* 1000), self._reset_approved)

943

1853

self.send_changedstate()

944

self._approved = value

945

gobject.timeout_add(_timedelta_to_milliseconds

946

(self.approval_duration),

947

self._reset_approved)

948

949

1854

950

1855

## D-Bus methods, signals & properties

951

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

1856

1857

## Interfaces

952

1858

953

1859

## Signals

954

1860

965

1871

pass

966

1872

967

1873

# PropertyChanged - signal

1874

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

968

1875

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

969

1876

def PropertyChanged(self, property, value):

970

1877

"D-Bus signal"

1004

1911

self.checked_ok()

1005

1912

1006

1913

# Enable - method

1914

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

1007

1915

@dbus.service.method(_interface)

1008

1916

def Enable(self):

1009

1917

"D-Bus method"

1010

1918

self.enable()

1011

1919

1012

1920

# StartChecker - method

1921

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

1013

1922

@dbus.service.method(_interface)

1014

1923

def StartChecker(self):

1015

1924

"D-Bus method"

1016

1925

self.start_checker()

1017

1926

1018

1927

# Disable - method

1928

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

1019

1929

@dbus.service.method(_interface)

1020

1930

def Disable(self):

1021

1931

"D-Bus method"

1022

1932

self.disable()

1023

1933

1024

1934

# StopChecker - method

1935

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

1025

1936

@dbus.service.method(_interface)

1026

1937

def StopChecker(self):

1027

1938

self.stop_checker()

1034

1945

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

1035

1946

1036

1947

# ApprovedByDefault - property

1037

@dbus_service_property(_interface, signature="b",

1948

@dbus_service_property(_interface,

1949

signature="b",

1038

1950

access="readwrite")

1039

1951

def ApprovedByDefault_dbus_property(self, value=None):

1040

1952

if value is None: # get

1042

1954

self.approved_by_default = bool(value)

1043

1955

1044

1956

# ApprovalDelay - property

1045

@dbus_service_property(_interface, signature="t",

1957

@dbus_service_property(_interface,

1958

signature="t",

1046

1959

access="readwrite")

1047

1960

def ApprovalDelay_dbus_property(self, value=None):

1048

1961

if value is None: # get

1049

return dbus.UInt64(self.approval_delay_milliseconds())

1962

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

1963

* 1000)

1050

1964

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

1051

1965

1052

1966

# ApprovalDuration - property

1053

@dbus_service_property(_interface, signature="t",

1967

@dbus_service_property(_interface,

1968

signature="t",

1054

1969

access="readwrite")

1055

1970

def ApprovalDuration_dbus_property(self, value=None):

1056

1971

if value is None: # get

1057

return dbus.UInt64(_timedelta_to_milliseconds(

1058

self.approval_duration))

1972

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

1973

* 1000)

1059

1974

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

1060

1975

1061

1976

# Name - property

1977

@dbus_annotations(

1978

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

1062

1979

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

1063

1980

def Name_dbus_property(self):

1064

1981

return dbus.String(self.name)

1065

1982

1066

1983

# Fingerprint - property

1984

@dbus_annotations(

1985

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

1067

1986

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

1068

1987

def Fingerprint_dbus_property(self):

1069

1988

return dbus.String(self.fingerprint)

1070

1989

1071

1990

# Host - property

1072

@dbus_service_property(_interface, signature="s",

1991

@dbus_service_property(_interface,

1992

signature="s",

1073

1993

access="readwrite")

1074

1994

def Host_dbus_property(self, value=None):

1075

1995

if value is None: # get

1076

1996

return dbus.String(self.host)

1077

self.host = value

1997

self.host = str(value)

1078

1998

1079

1999

# Created - property

2000

@dbus_annotations(

2001

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

1080

2002

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

1081

2003

def Created_dbus_property(self):

1082

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

2004

return datetime_to_dbus(self.created)

1083

2005

1084

2006

# LastEnabled - property

1085

2007

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

1087

2009

return datetime_to_dbus(self.last_enabled)

1088

2010

1089

2011

# Enabled - property

1090

@dbus_service_property(_interface, signature="b",

2012

@dbus_service_property(_interface,

2013

signature="b",

1091

2014

access="readwrite")

1092

2015

def Enabled_dbus_property(self, value=None):

1093

2016

if value is None: # get

1098

2021

self.disable()

1099

2022

1100

2023

# LastCheckedOK - property

1101

@dbus_service_property(_interface, signature="s",

2024

@dbus_service_property(_interface,

2025

signature="s",

1102

2026

access="readwrite")

1103

2027

def LastCheckedOK_dbus_property(self, value=None):

1104

2028

if value is not None:

1106

2030

return

1107

2031

return datetime_to_dbus(self.last_checked_ok)

1108

2032

2033

# LastCheckerStatus - property

2034

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

2035

def LastCheckerStatus_dbus_property(self):

2036

return dbus.Int16(self.last_checker_status)

2037

1109

2038

# Expires - property

1110

2039

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

1111

2040

def Expires_dbus_property(self):

1117

2046

return datetime_to_dbus(self.last_approval_request)

1118

2047

1119

2048

# Timeout - property

1120

@dbus_service_property(_interface, signature="t",

2049

@dbus_service_property(_interface,

2050

signature="t",

1121

2051

access="readwrite")

1122

2052

def Timeout_dbus_property(self, value=None):

1123

2053

if value is None: # get

1124

return dbus.UInt64(self.timeout_milliseconds())

2054

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

2055

old_timeout = self.timeout

1125

2056

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

1126

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

1127

return

1128

# Reschedule timeout

1129

gobject.source_remove(self.disable_initiator_tag)

1130

self.disable_initiator_tag = None

1131

self.expires = None

1132

time_to_die = (self.

1133

_timedelta_to_milliseconds((self

1134

.last_checked_ok

1135

+ self.timeout)

1136

- datetime.datetime

1137

.utcnow()))

1138

if time_to_die <= 0:

1139

# The timeout has passed

1140

self.disable()

1141

else:

1142

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

1143

+ datetime.timedelta(milliseconds = time_to_die))

1144

self.disable_initiator_tag = (gobject.timeout_add

1145

(time_to_die, self.disable))

2057

# Reschedule disabling

2058

if self.enabled:

2059

now = datetime.datetime.utcnow()

2060

self.expires += self.timeout - old_timeout

2061

if self.expires <= now:

2062

# The timeout has passed

2063

self.disable()

2064

else:

2065

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

2066

is None):

2067

return

2068

GLib.source_remove(self.disable_initiator_tag)

2069

self.disable_initiator_tag = GLib.timeout_add(

2070

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

2071

self.disable)

1146

2072

1147

2073

# ExtendedTimeout - property

1148

@dbus_service_property(_interface, signature="t",

2074

@dbus_service_property(_interface,

2075

signature="t",

1149

2076

access="readwrite")

1150

2077

def ExtendedTimeout_dbus_property(self, value=None):

1151

2078

if value is None: # get

1152

return dbus.UInt64(self.extended_timeout_milliseconds())

2079

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

2080

* 1000)

1153

2081

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

1154

2082

1155

2083

# Interval - property

1156

@dbus_service_property(_interface, signature="t",

2084

@dbus_service_property(_interface,

2085

signature="t",

1157

2086

access="readwrite")

1158

2087

def Interval_dbus_property(self, value=None):

1159

2088

if value is None: # get

1160

return dbus.UInt64(self.interval_milliseconds())

2089

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

1161

2090

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

1162

2091

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

1163

2092

return

1164

# Reschedule checker run

1165

gobject.source_remove(self.checker_initiator_tag)

1166

self.checker_initiator_tag = (gobject.timeout_add

1167

(value, self.start_checker))

1168

self.start_checker() # Start one now, too

2093

if self.enabled:

2094

# Reschedule checker run

2095

GLib.source_remove(self.checker_initiator_tag)

2096

self.checker_initiator_tag = GLib.timeout_add(

2097

value, self.start_checker)

2098

self.start_checker() # Start one now, too

1169

2099

1170

2100

# Checker - property

1171

@dbus_service_property(_interface, signature="s",

2101

@dbus_service_property(_interface,

2102

signature="s",

1172

2103

access="readwrite")

1173

2104

def Checker_dbus_property(self, value=None):

1174

2105

if value is None: # get

1175

2106

return dbus.String(self.checker_command)

1176

self.checker_command = value

2107

self.checker_command = str(value)

1177

2108

1178

2109

# CheckerRunning - property

1179

@dbus_service_property(_interface, signature="b",

2110

@dbus_service_property(_interface,

2111

signature="b",

1180

2112

access="readwrite")

1181

2113

def CheckerRunning_dbus_property(self, value=None):

1182

2114

if value is None: # get

1187

2119

self.stop_checker()

1188

2120

1189

2121

# ObjectPath - property

2122

@dbus_annotations(

2123

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

2124

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

1190

2125

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

1191

2126

def ObjectPath_dbus_property(self):

1192

2127

return self.dbus_object_path # is already a dbus.ObjectPath

1193

2128

1194

2129

# Secret = property

1195

@dbus_service_property(_interface, signature="ay",

1196

access="write", byte_arrays=True)

2130

@dbus_annotations(

2131

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

2132

"invalidates"})

2133

@dbus_service_property(_interface,

2134

signature="ay",

2135

access="write",

2136

byte_arrays=True)

1197

2137

def Secret_dbus_property(self, value):

1198

self.secret = str(value)

2138

self.secret = bytes(value)

1199

2139

1200

2140

del _interface

1201

2141

1205

2145

self._pipe = child_pipe

1206

2146

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

1207

2147

if not self._pipe.recv():

1208

raise KeyError()

2148

raise KeyError(fpr)

1209

2149

1210

2150

def __getattribute__(self, name):

1211

if(name == '_pipe'):

2151

if name == '_pipe':

1212

2152

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

1213

2153

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

1214

2154

data = self._pipe.recv()

1215

2155

if data[0] == 'data':

1216

2156

return data[1]

1217

2157

if data[0] == 'function':

2158

1218

2159

def func(*args, **kwargs):

1219

2160

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

1220

2161

return self._pipe.recv()[1]

2162

1221

2163

return func

1222

2164

1223

2165

def __setattr__(self, name, value):

1224

if(name == '_pipe'):

2166

if name == '_pipe':

1225

2167

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

1226

2168

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

1227

2169

1228

class ClientDBusTransitional(ClientDBus):

1229

__metaclass__ = transitional_dbus_metaclass

1230

2170

1231

2171

class ClientHandler(socketserver.BaseRequestHandler, object):

1232

2172

"""A class to handle client connections.

1237

2177

def handle(self):

1238

2178

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

1239

2179

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

1240

unicode(self.client_address))

2180

str(self.client_address))

1241

2181

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

1242

2182

self.server.child_pipe.fileno())

1243

2183

1244

session = (gnutls.connection

1245

.ClientSession(self.request,

1246

gnutls.connection

1247

.X509Credentials()))

1248

1249

# Note: gnutls.connection.X509Credentials is really a

1250

# generic GnuTLS certificate credentials object so long as

1251

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

1252

# here despite using OpenPGP certificates.

2184

session = gnutls.ClientSession(self.request)

1253

2185

1254

2186

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

1255

2187

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

1259

2191

priority = self.server.gnutls_priority

1260

2192

if priority is None:

1261

2193

priority = "NORMAL"

1262

(gnutls.library.functions

1263

.gnutls_priority_set_direct(session._c_object,

1264

priority, None))

2194

gnutls.priority_set_direct(session._c_object,

2195

priority.encode("utf-8"),

2196

None)

1265

2197

1266

2198

# Start communication using the Mandos protocol

1267

2199

# Get protocol number

1269

2201

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

1270

2202

try:

1271

2203

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

1272

raise RuntimeError

2204

raise RuntimeError(line)

1273

2205

except (ValueError, IndexError, RuntimeError) as error:

1274

2206

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

1275

2207

return

1277

2209

# Start GnuTLS connection

1278

2210

try:

1279

2211

session.handshake()

1280

except gnutls.errors.GNUTLSError as error:

2212

except gnutls.Error as error:

1281

2213

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

1282

2214

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

1283

2215

# established. Just abandon the request.

1287

2219

approval_required = False

1288

2220

try:

1289

2221

try:

1290

fpr = self.fingerprint(self.peer_certificate

1291

(session))

1292

except (TypeError,

1293

gnutls.errors.GNUTLSError) as error:

2222

fpr = self.fingerprint(

2223

self.peer_certificate(session))

2224

except (TypeError, gnutls.Error) as error:

1294

2225

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

1295

2226

return

1296

2227

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

1309

2240

while True:

1310

2241

if not client.enabled:

1311

2242

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

1312

client.name)

2243

client.name)

1313

2244

if self.server.use_dbus:

1314

2245

# Emit D-Bus signal

1315

client.Rejected("Disabled")

2246

client.Rejected("Disabled")

1316

2247

return

1317

2248

1318

if client._approved or not client.approval_delay:

2249

if client.approved or not client.approval_delay:

1319

2250

#We are approved or approval is disabled

1320

2251

break

1321

elif client._approved is None:

2252

elif client.approved is None:

1322

2253

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

1323

2254

client.name)

1324

2255

if self.server.use_dbus:

1325

2256

# Emit D-Bus signal

1326

2257

client.NeedApproval(

1327

client.approval_delay_milliseconds(),

1328

client.approved_by_default)

2258

client.approval_delay.total_seconds()

2259

* 1000, client.approved_by_default)

1329

2260

else:

1330

2261

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

1331

2262

client.name)

1335

2266

return

1336

2267

1337

2268

#wait until timeout or approved

1338

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

1339

2269

time = datetime.datetime.now()

1340

2270

client.changedstate.acquire()

1341

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

2271

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

1342

2272

client.changedstate.release()

1343

2273

time2 = datetime.datetime.now()

1344

2274

if (time2 - time) >= delay:

1355

2285

else:

1356

2286

delay -= time2 - time

1357

2287

1358

sent_size = 0

1359

while sent_size < len(client.secret):

1360

try:

1361

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

1362

except gnutls.errors.GNUTLSError as error:

1363

logger.warning("gnutls send failed")

1364

return

1365

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

1366

sent, len(client.secret)

1367

- (sent_size + sent))

1368

sent_size += sent

2288

try:

2289

session.send(client.secret)

2290

except gnutls.Error as error:

2291

logger.warning("gnutls send failed",

2292

exc_info = error)

2293

return

1369

2294

1370

2295

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

1371

# bump the timeout as if seen

1372

client.checked_ok(client.extended_timeout)

2296

# bump the timeout using extended_timeout

2297

client.bump_timeout(client.extended_timeout)

1373

2298

if self.server.use_dbus:

1374

2299

# Emit D-Bus signal

1375

2300

client.GotSecret()

1379

2304

client.approvals_pending -= 1

1380

2305

try:

1381

2306

session.bye()

1382

except gnutls.errors.GNUTLSError as error:

1383

logger.warning("GnuTLS bye failed")

2307

except gnutls.Error as error:

2308

logger.warning("GnuTLS bye failed",

2309

exc_info=error)

1384

2310

1385

2311

@staticmethod

1386

2312

def peer_certificate(session):

1387

2313

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

1388

2314

# If not an OpenPGP certificate...

1389

if (gnutls.library.functions

1390

.gnutls_certificate_type_get(session._c_object)

1391

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1392

# ...do the normal thing

1393

return session.peer_certificate

2315

if (gnutls.certificate_type_get(session._c_object)

2316

!= gnutls.CRT_OPENPGP):

2317

# ...return invalid data

2318

return b""

1394

2319

list_size = ctypes.c_uint(1)

1395

cert_list = (gnutls.library.functions

1396

.gnutls_certificate_get_peers

2320

cert_list = (gnutls.certificate_get_peers

1397

2321

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

1398

2322

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

1399

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

1400

" certificate")

2323

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

1401

2324

if list_size.value == 0:

1402

2325

return None

1403

2326

cert = cert_list[0]

1407

2330

def fingerprint(openpgp):

1408

2331

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1409

2332

# New GnuTLS "datum" with the OpenPGP public key

1410

datum = (gnutls.library.types

1411

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

1412

ctypes.POINTER

1413

(ctypes.c_ubyte)),

1414

ctypes.c_uint(len(openpgp))))

2333

datum = gnutls.datum_t(

2334

ctypes.cast(ctypes.c_char_p(openpgp),

2335

ctypes.POINTER(ctypes.c_ubyte)),

2336

ctypes.c_uint(len(openpgp)))

1415

2337

# New empty GnuTLS certificate

1416

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1417

(gnutls.library.functions

1418

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2338

crt = gnutls.openpgp_crt_t()

2339

gnutls.openpgp_crt_init(ctypes.byref(crt))

1419

2340

# Import the OpenPGP public key into the certificate

1420

(gnutls.library.functions

1421

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

1422

gnutls.library.constants

1423

.GNUTLS_OPENPGP_FMT_RAW))

2341

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

2342

gnutls.OPENPGP_FMT_RAW)

1424

2343

# Verify the self signature in the key

1425

2344

crtverify = ctypes.c_uint()

1426

(gnutls.library.functions

1427

.gnutls_openpgp_crt_verify_self(crt, 0,

1428

ctypes.byref(crtverify)))

2345

gnutls.openpgp_crt_verify_self(crt, 0,

2346

ctypes.byref(crtverify))

1429

2347

if crtverify.value != 0:

1430

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1431

raise (gnutls.errors.CertificateSecurityError

1432

("Verify failed"))

2348

gnutls.openpgp_crt_deinit(crt)

2349

raise gnutls.CertificateSecurityError("Verify failed")

1433

2350

# New buffer for the fingerprint

1434

2351

buf = ctypes.create_string_buffer(20)

1435

2352

buf_len = ctypes.c_size_t()

1436

2353

# Get the fingerprint from the certificate into the buffer

1437

(gnutls.library.functions

1438

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

1439

ctypes.byref(buf_len)))

2354

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

2355

ctypes.byref(buf_len))

1440

2356

# Deinit the certificate

1441

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2357

gnutls.openpgp_crt_deinit(crt)

1442

2358

# Convert the buffer to a Python bytestring

1443

2359

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

1444

2360

# Convert the bytestring to hexadecimal notation

1445

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

2361

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

1446

2362

return hex_fpr

1447

2363

1448

2364

1449

2365

class MultiprocessingMixIn(object):

1450

2366

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

2367

1451

2368

def sub_process_main(self, request, address):

1452

2369

try:

1453

2370

self.finish_request(request, address)

1454

except:

2371

except Exception:

1455

2372

self.handle_error(request, address)

1456

2373

self.close_request(request)

1457

2374

1458

2375

def process_request(self, request, address):

1459

2376

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

1460

multiprocessing.Process(target = self.sub_process_main,

1461

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

2377

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

2378

args = (request, address))

2379

proc.start()

2380

return proc

1462

2381

1463

2382

1464

2383

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1465

2384

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

2385

1466

2386

def process_request(self, request, client_address):

1467

2387

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

1468

2388

1470

2390

"""

1471

2391

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1472

2392

1473

super(MultiprocessingMixInWithPipe,

1474

self).process_request(request, client_address)

2393

proc = MultiprocessingMixIn.process_request(self, request,

2394

client_address)

1475

2395

self.child_pipe.close()

1476

self.add_pipe(parent_pipe)

2396

self.add_pipe(parent_pipe, proc)

1477

2397

1478

def add_pipe(self, parent_pipe):

2398

def add_pipe(self, parent_pipe, proc):

1479

2399

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

1480

raise NotImplementedError

2400

raise NotImplementedError()

1481

2401

1482

2402

1483

2403

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1489

2409

interface: None or a network interface name (string)

1490

2410

use_ipv6: Boolean; to use IPv6 or not

1491

2411

"""

2412

1492

2413

def __init__(self, server_address, RequestHandlerClass,

1493

interface=None, use_ipv6=True):

2414

interface=None,

2415

use_ipv6=True,

2416

socketfd=None):

2417

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

2418

creating a new one with socket.socket().

2419

"""

1494

2420

self.interface = interface

1495

2421

if use_ipv6:

1496

2422

self.address_family = socket.AF_INET6

2423

if socketfd is not None:

2424

# Save the file descriptor

2425

self.socketfd = socketfd

2426

# Save the original socket.socket() function

2427

self.socket_socket = socket.socket

2428

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

2429

#

2430

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

2431

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

2432

# patching socket.socket.)

2433

#

2434

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

2435

@functools.wraps(socket.socket)

2436

def socket_wrapper(*args, **kwargs):

2437

# Restore original function so subsequent calls are

2438

# not affected.

2439

socket.socket = self.socket_socket

2440

del self.socket_socket

2441

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

2442

# saved file descriptor.

2443

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

2444

# Replace socket.socket() function with wrapper

2445

socket.socket = socket_wrapper

2446

# The socketserver.TCPServer.__init__ will call

2447

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

2448

# socket_wrapper(), if socketfd was set.

1497

2449

socketserver.TCPServer.__init__(self, server_address,

1498

2450

RequestHandlerClass)

2451

1499

2452

def server_bind(self):

1500

2453

"""This overrides the normal server_bind() function

1501

2454

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

1502

2455

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

1503

2456

if self.interface is not None:

1504

2457

if SO_BINDTODEVICE is None:

1505

logger.error("SO_BINDTODEVICE does not exist;"

1506

" cannot bind to interface %s",

1507

self.interface)

1508

else:

1509

try:

1510

self.socket.setsockopt(socket.SOL_SOCKET,

1511

SO_BINDTODEVICE,

1512

str(self.interface

1513

+ '\0'))

1514

except socket.error as error:

1515

if error[0] == errno.EPERM:

1516

logger.error("No permission to"

1517

" bind to interface %s",

1518

self.interface)

1519

elif error[0] == errno.ENOPROTOOPT:

1520

logger.error("SO_BINDTODEVICE not available;"

1521

" cannot bind to interface %s",

1522

self.interface)

1523

else:

1524

raise

2458

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

2459

# common enough.

2460

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

2461

SO_BINDTODEVICE = 25

2462

try:

2463

self.socket.setsockopt(

2464

socket.SOL_SOCKET, SO_BINDTODEVICE,

2465

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

2466

except socket.error as error:

2467

if error.errno == errno.EPERM:

2468

logger.error("No permission to bind to"

2469

" interface %s", self.interface)

2470

elif error.errno == errno.ENOPROTOOPT:

2471

logger.error("SO_BINDTODEVICE not available;"

2472

" cannot bind to interface %s",

2473

self.interface)

2474

elif error.errno == errno.ENODEV:

2475

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

2476

" cannot bind", self.interface)

2477

else:

2478

raise

1525

2479

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

1526

2480

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

1527

2481

if not self.server_address[0]:

1528

2482

if self.address_family == socket.AF_INET6:

1529

2483

any_address = "::" # in6addr_any

1530

2484

else:

1531

any_address = socket.INADDR_ANY

2485

any_address = "0.0.0.0" # INADDR_ANY

1532

2486

self.server_address = (any_address,

1533

2487

self.server_address[1])

1534

2488

elif not self.server_address[1]:

1535

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

1536

0)

2489

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

1537

2490

# if self.interface:

1538

2491

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

1539

2492

# 0, # port

1551

2504

gnutls_priority GnuTLS priority string

1552

2505

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

1553

2506

1554

Assumes a gobject.MainLoop event loop.

2507

Assumes a GLib.MainLoop event loop.

1555

2508

"""

2509

1556

2510

def __init__(self, server_address, RequestHandlerClass,

1557

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

1558

gnutls_priority=None, use_dbus=True):

2511

interface=None,

2512

use_ipv6=True,

2513

clients=None,

2514

gnutls_priority=None,

2515

use_dbus=True,

2516

socketfd=None):

1559

2517

self.enabled = False

1560

2518

self.clients = clients

1561

2519

if self.clients is None:

1562

self.clients = set()

2520

self.clients = {}

1563

2521

self.use_dbus = use_dbus

1564

2522

self.gnutls_priority = gnutls_priority

1565

2523

IPv6_TCPServer.__init__(self, server_address,

1566

2524

RequestHandlerClass,

1567

2525

interface = interface,

1568

use_ipv6 = use_ipv6)

2526

use_ipv6 = use_ipv6,

2527

socketfd = socketfd)

2528

1569

2529

def server_activate(self):

1570

2530

if self.enabled:

1571

2531

return socketserver.TCPServer.server_activate(self)

2532

1572

2533

def enable(self):

1573

2534

self.enabled = True

1574

def add_pipe(self, parent_pipe):

2535

2536

def add_pipe(self, parent_pipe, proc):

1575

2537

# Call "handle_ipc" for both data and EOF events

1576

gobject.io_add_watch(parent_pipe.fileno(),

1577

gobject.IO_IN | gobject.IO_HUP,

1578

functools.partial(self.handle_ipc,

1579

parent_pipe = parent_pipe))

1580

1581

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

2538

GLib.io_add_watch(

2539

parent_pipe.fileno(),

2540

GLib.IO_IN | GLib.IO_HUP,

2541

functools.partial(self.handle_ipc,

2542

parent_pipe = parent_pipe,

2543

proc = proc))

2544

2545

def handle_ipc(self, source, condition,

2546

parent_pipe=None,

2547

proc = None,

1582

2548

client_object=None):

1583

condition_names = {

1584

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

1585

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

1586

# blocking).

1587

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

1588

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

1589

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

1590

# broken, usually for pipes and

1591

# sockets).

1592

}

1593

conditions_string = ' | '.join(name

1594

for cond, name in

1595

condition_names.iteritems()

1596

if cond & condition)

1597

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

1598

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

2549

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

2550

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

2551

# Wait for other process to exit

2552

proc.join()

1599

2553

return False

1600

2554

1601

2555

# Read a request from the child

1606

2560

fpr = request[1]

1607

2561

address = request[2]

1608

2562

1609

for c in self.clients:

2563

for c in self.clients.values():

1610

2564

if c.fingerprint == fpr:

1611

2565

client = c

1612

2566

break

1615

2569

"dress: %s", fpr, address)

1616

2570

if self.use_dbus:

1617

2571

# Emit D-Bus signal

1618

mandos_dbus_service.ClientNotFound(fpr, address[0])

2572

mandos_dbus_service.ClientNotFound(fpr,

2573

address[0])

1619

2574

parent_pipe.send(False)

1620

2575

return False

1621

2576

1622

gobject.io_add_watch(parent_pipe.fileno(),

1623

gobject.IO_IN | gobject.IO_HUP,

1624

functools.partial(self.handle_ipc,

1625

parent_pipe = parent_pipe,

1626

client_object = client))

2577

GLib.io_add_watch(

2578

parent_pipe.fileno(),

2579

GLib.IO_IN | GLib.IO_HUP,

2580

functools.partial(self.handle_ipc,

2581

parent_pipe = parent_pipe,

2582

proc = proc,

2583

client_object = client))

1627

2584

parent_pipe.send(True)

1628

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

2585

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

2586

# same fileno

1629

2587

return False

1630

2588

if command == 'funcall':

1631

2589

funcname = request[1]

1632

2590

args = request[2]

1633

2591

kwargs = request[3]

1634

2592

1635

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

2593

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

2594

funcname)(*args,

2595

**kwargs)))

1636

2596

1637

2597

if command == 'getattr':

1638

2598

attrname = request[1]

1639

if callable(client_object.__getattribute__(attrname)):

1640

parent_pipe.send(('function',))

2599

if isinstance(client_object.__getattribute__(attrname),

2600

collections.Callable):

2601

parent_pipe.send(('function', ))

1641

2602

else:

1642

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

2603

parent_pipe.send((

2604

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

1643

2605

1644

2606

if command == 'setattr':

1645

2607

attrname = request[1]

1649

2611

return True

1650

2612

1651

2613

2614

def rfc3339_duration_to_delta(duration):

2615

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

2616

2617

>>> rfc3339_duration_to_delta("P7D")

2618

datetime.timedelta(7)

2619

>>> rfc3339_duration_to_delta("PT60S")

2620

datetime.timedelta(0, 60)

2621

>>> rfc3339_duration_to_delta("PT60M")

2622

datetime.timedelta(0, 3600)

2623

>>> rfc3339_duration_to_delta("PT24H")

2624

datetime.timedelta(1)

2625

>>> rfc3339_duration_to_delta("P1W")

2626

datetime.timedelta(7)

2627

>>> rfc3339_duration_to_delta("PT5M30S")

2628

datetime.timedelta(0, 330)

2629

>>> rfc3339_duration_to_delta("P1DT3M20S")

2630

datetime.timedelta(1, 200)

2631

"""

2632

2633

# Parsing an RFC 3339 duration with regular expressions is not

2634

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

2635

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

2636

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

2637

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

2638

# avoid excessive use of external libraries.

2639

2640

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

2641

Token = collections.namedtuple("Token", (

2642

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

2643

# a "group" containing digits

2644

"value", # datetime.timedelta or None

2645

"followers")) # Tokens valid after this token

2646

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

2647

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

2648

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

2649

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

2650

datetime.timedelta(seconds=1),

2651

frozenset((token_end, )))

2652

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

2653

datetime.timedelta(minutes=1),

2654

frozenset((token_second, token_end)))

2655

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

2656

datetime.timedelta(hours=1),

2657

frozenset((token_minute, token_end)))

2658

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

2659

None,

2660

frozenset((token_hour, token_minute,

2661

token_second)))

2662

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

2663

datetime.timedelta(days=1),

2664

frozenset((token_time, token_end)))

2665

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

2666

datetime.timedelta(weeks=4),

2667

frozenset((token_day, token_end)))

2668

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

2669

datetime.timedelta(weeks=52),

2670

frozenset((token_month, token_end)))

2671

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

2672

datetime.timedelta(weeks=1),

2673

frozenset((token_end, )))

2674

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

2675

frozenset((token_year, token_month,

2676

token_day, token_time,

2677

token_week)))

2678

# Define starting values

2679

value = datetime.timedelta() # Value so far

2680

found_token = None

2681

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

2682

s = duration # String left to parse

2683

# Loop until end token is found

2684

while found_token is not token_end:

2685

# Search for any currently valid tokens

2686

for token in followers:

2687

match = token.regexp.match(s)

2688

if match is not None:

2689

# Token found

2690

if token.value is not None:

2691

# Value found, parse digits

2692

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

2693

# Add to value so far

2694

value += factor * token.value

2695

# Strip token from string

2696

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

2697

# Go to found token

2698

found_token = token

2699

# Set valid next tokens

2700

followers = found_token.followers

2701

break

2702

else:

2703

# No currently valid tokens were found

2704

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

2705

.format(duration))

2706

# End token found

2707

return value

2708

2709

1652

2710

def string_to_delta(interval):

1653

2711

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

1654

2712

1665

2723

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

1666

2724

datetime.timedelta(0, 330)

1667

2725

"""

2726

2727

try:

2728

return rfc3339_duration_to_delta(interval)

2729

except ValueError:

2730

pass

2731

1668

2732

timevalue = datetime.timedelta(0)

1669

2733

for s in interval.split():

1670

2734

try:

1671

suffix = unicode(s[-1])

2735

suffix = s[-1]

1672

2736

value = int(s[:-1])

1673

2737

if suffix == "d":

1674

2738

delta = datetime.timedelta(value)

1681

2745

elif suffix == "w":

1682

2746

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

1683

2747

else:

1684

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

1685

except (ValueError, IndexError) as e:

2748

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

2749

except IndexError as e:

1686

2750

raise ValueError(*(e.args))

1687

2751

timevalue += delta

1688

2752

return timevalue

1689

2753

1690

2754

1691

def if_nametoindex(interface):

1692

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

1693

1694

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

1695

global if_nametoindex

1696

try:

1697

if_nametoindex = (ctypes.cdll.LoadLibrary

1698

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

1699

.if_nametoindex)

1700

except (OSError, AttributeError):

1701

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

1702

def if_nametoindex(interface):

1703

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

1704

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

1705

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

1706

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1707

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

1708

interface))

1709

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

1710

ifreq[16:20])[0]

1711

return interface_index

1712

return if_nametoindex(interface)

1713

1714

1715

2755

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

1716

2756

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

1717

2757

1725

2765

sys.exit()

1726

2766

if not noclose:

1727

2767

# Close all standard open file descriptors

1728

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

2768

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

1729

2769

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

1730

2770

raise OSError(errno.ENODEV,

1731

"%s not a character device"

1732

% os.path.devnull)

2771

"{} not a character device"

2772

.format(os.devnull))

1733

2773

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

1734

2774

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

1735

2775

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

1744

2784

1745

2785

parser = argparse.ArgumentParser()

1746

2786

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

1747

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

2787

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

1748

2788

help="show version number and exit")

1749

2789

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

1750

2790

help="Bind to interface IF")

1756

2796

help="Run self-test")

1757

2797

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

1758

2798

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

1759

" to terminal")

2799

" to terminal", default=None)

1760

2800

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

1761

2801

help="Debug level for stdout output")

1762

2802

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

1769

2809

" files")

1770

2810

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

1771

2811

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

1772

" system bus interface")

2812

" system bus interface", default=None)

1773

2813

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

1774

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

2814

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

2815

default=None)

2816

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

2817

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

2818

" state", default=None)

2819

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

2820

help="Specify a file descriptor to a network"

2821

" socket to use instead of creating one")

2822

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

2823

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

2824

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

2825

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

2826

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

2827

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

2828

default=None)

2829

1775

2830

options = parser.parse_args()

1776

2831

1777

2832

if options.check:

1778

2833

import doctest

1779

doctest.testmod()

1780

sys.exit()

2834

fail_count, test_count = doctest.testmod()

2835

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

1781

2836

1782

2837

# Default values for config file for server-global settings

1783

2838

server_defaults = { "interface": "",

1785

2840

"port": "",

1786

2841

"debug": "False",

1787

2842

"priority":

1788

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

2843

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

2844

":+SIGN-DSA-SHA256",

1789

2845

"servicename": "Mandos",

1790

2846

"use_dbus": "True",

1791

2847

"use_ipv6": "True",

1792

2848

"debuglevel": "",

1793

}

2849

"restore": "True",

2850

"socket": "",

2851

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

2852

"foreground": "False",

2853

"zeroconf": "True",

2854

}

1794

2855

1795

2856

# Parse config file for server-global settings

1796

2857

server_config = configparser.SafeConfigParser(server_defaults)

1797

2858

del server_defaults

1798

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

1799

"mandos.conf"))

2859

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

1800

2860

# Convert the SafeConfigParser object to a dict

1801

2861

server_settings = server_config.defaults()

1802

2862

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

1803

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

2863

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

1804

2864

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

1805

2865

option)

1806

2866

if server_settings["port"]:

1807

2867

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

1808

2868

"port")

2869

if server_settings["socket"]:

2870

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

2871

"socket")

2872

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

2873

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

2874

# happen with a supplied network socket.

2875

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

2876

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

2877

["socket"])

1809

2878

del server_config

1810

2879

1811

2880

# Override the settings from the config file with command line

1812

2881

# options, if set.

1813

2882

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

1814

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

1815

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

2883

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

2884

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

2885

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

1816

2886

value = getattr(options, option)

1817

2887

if value is not None:

1818

2888

server_settings[option] = value

1819

2889

del options

1820

2890

# Force all strings to be unicode

1821

2891

for option in server_settings.keys():

1822

if type(server_settings[option]) is str:

1823

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

2892

if isinstance(server_settings[option], bytes):

2893

server_settings[option] = (server_settings[option]

2894

.decode("utf-8"))

2895

# Force all boolean options to be boolean

2896

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

2897

"foreground", "zeroconf"):

2898

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

2899

# Debug implies foreground

2900

if server_settings["debug"]:

2901

server_settings["foreground"] = True

1824

2902

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

1825

2903

1826

2904

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

1827

2905

2906

if (not server_settings["zeroconf"]

2907

and not (server_settings["port"]

2908

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

2909

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

2910

1828

2911

# For convenience

1829

2912

debug = server_settings["debug"]

1830

2913

debuglevel = server_settings["debuglevel"]

1831

2914

use_dbus = server_settings["use_dbus"]

1832

2915

use_ipv6 = server_settings["use_ipv6"]

2916

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

2917

stored_state_file)

2918

foreground = server_settings["foreground"]

2919

zeroconf = server_settings["zeroconf"]

2920

2921

if debug:

2922

initlogger(debug, logging.DEBUG)

2923

else:

2924

if not debuglevel:

2925

initlogger(debug)

2926

else:

2927

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

2928

initlogger(debug, level)

1833

2929

1834

2930

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

1835

syslogger.setFormatter(logging.Formatter

1836

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

1837

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

1838

% server_settings["servicename"]))

2931

syslogger.setFormatter(

2932

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

2933

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

2934

server_settings["servicename"])))

1839

2935

1840

2936

# Parse config file with clients

1841

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

1842

"extended_timeout": "15m",

1843

"interval": "2m",

1844

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

1845

"host": "",

1846

"approval_delay": "0s",

1847

"approval_duration": "1s",

1848

}

1849

client_config = configparser.SafeConfigParser(client_defaults)

2937

client_config = configparser.SafeConfigParser(Client

2938

.client_defaults)

1850

2939

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

1851

2940

"clients.conf"))

1852

2941

1853

2942

global mandos_dbus_service

1854

2943

mandos_dbus_service = None

1855

2944

1856

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

1857

server_settings["port"]),

1858

ClientHandler,

1859

interface=(server_settings["interface"]

1860

or None),

1861

use_ipv6=use_ipv6,

1862

gnutls_priority=

1863

server_settings["priority"],

1864

use_dbus=use_dbus)

1865

if not debug:

1866

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

2945

socketfd = None

2946

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

2947

socketfd = server_settings["socket"]

2948

tcp_server = MandosServer(

2949

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

2950

ClientHandler,

2951

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

2952

use_ipv6=use_ipv6,

2953

gnutls_priority=server_settings["priority"],

2954

use_dbus=use_dbus,

2955

socketfd=socketfd)

2956

if not foreground:

2957

pidfilename = "/run/mandos.pid"

2958

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

2959

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

2960

pidfile = None

1867

2961

try:

1868

pidfile = open(pidfilename, "w")

1869

except IOError:

1870

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

2962

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

2963

except IOError as e:

2964

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

2965

exc_info=e)

1871

2966

1872

try:

1873

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

1874

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

1875

except KeyError:

2967

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

2968

("mandos", "mandos"),

2969

("nobody", "nogroup")):

1876

2970

try:

1877

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

1878

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

2971

uid = pwd.getpwnam(name).pw_uid

2972

gid = pwd.getpwnam(group).pw_gid

2973

break

1879

2974

except KeyError:

1880

try:

1881

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

1882

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

1883

except KeyError:

1884

uid = 65534

1885

gid = 65534

2975

continue

2976

else:

2977

uid = 65534

2978

gid = 65534

1886

2979

try:

1887

2980

os.setgid(gid)

1888

2981

os.setuid(uid)

2982

if debug:

2983

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

2984

gid))

1889

2985

except OSError as error:

1890

if error[0] != errno.EPERM:

1891

raise error

1892

1893

if not debug and not debuglevel:

1894

syslogger.setLevel(logging.WARNING)

1895

console.setLevel(logging.WARNING)

1896

if debuglevel:

1897

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

1898

syslogger.setLevel(level)

1899

console.setLevel(level)

2986

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

2987

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

2988

if error.errno != errno.EPERM:

2989

raise

1900

2990

1901

2991

if debug:

1902

2992

# Enable all possible GnuTLS debugging

1903

2993

1904

2994

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

1905

2995

# - GnuTLS manual

1906

gnutls.library.functions.gnutls_global_set_log_level(11)

2996

gnutls.global_set_log_level(11)

1907

2997

1908

@gnutls.library.types.gnutls_log_func

2998

@gnutls.log_func

1909

2999

def debug_gnutls(level, string):

1910

3000

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

1911

3001

1912

(gnutls.library.functions

1913

.gnutls_global_set_log_function(debug_gnutls))

3002

gnutls.global_set_log_function(debug_gnutls)

1914

3003

1915

3004

# Redirect stdin so all checkers get /dev/null

1916

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

3005

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

1917

3006

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

1918

3007

if null > 2:

1919

3008

os.close(null)

1920

else:

1921

# No console logging

1922

logger.removeHandler(console)

1923

3009

1924

3010

# Need to fork before connecting to D-Bus

1925

if not debug:

3011

if not foreground:

1926

3012

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

1927

3013

daemon()

1928

3014

3015

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

3016

# to inform GLib that threads will be used.

3017

GLib.threads_init()

3018

1929

3019

global main_loop

1930

3020

# From the Avahi example code

1931

DBusGMainLoop(set_as_default=True )

1932

main_loop = gobject.MainLoop()

3021

DBusGMainLoop(set_as_default=True)

3022

main_loop = GLib.MainLoop()

1933

3023

bus = dbus.SystemBus()

1934

3024

# End of Avahi example code

1935

3025

if use_dbus:

1936

3026

try:

1937

3027

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

1938

bus, do_not_queue=True)

1939

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

1940

bus, do_not_queue=True)

1941

except dbus.exceptions.NameExistsException as e:

1942

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

3028

bus,

3029

do_not_queue=True)

3030

old_bus_name = dbus.service.BusName(

3031

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

3032

do_not_queue=True)

3033

except dbus.exceptions.DBusException as e:

3034

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

1943

3035

use_dbus = False

1944

3036

server_settings["use_dbus"] = False

1945

3037

tcp_server.use_dbus = False

1946

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1947

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

1948

servicetype = "_mandos._tcp",

1949

protocol = protocol, bus = bus)

1950

if server_settings["interface"]:

1951

service.interface = (if_nametoindex

1952

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

3038

if zeroconf:

3039

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3040

service = AvahiServiceToSyslog(

3041

name = server_settings["servicename"],

3042

servicetype = "_mandos._tcp",

3043

protocol = protocol,

3044

bus = bus)

3045

if server_settings["interface"]:

3046

service.interface = if_nametoindex(

3047

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

1953

3048

1954

3049

global multiprocessing_manager

1955

3050

multiprocessing_manager = multiprocessing.Manager()

1956

3051

1957

3052

client_class = Client

1958

3053

if use_dbus:

1959

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

1960

def client_config_items(config, section):

1961

special_settings = {

1962

"approved_by_default":

1963

lambda: config.getboolean(section,

1964

"approved_by_default"),

1965

}

1966

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

3054

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

3055

3056

client_settings = Client.config_parser(client_config)

3057

old_client_settings = {}

3058

clients_data = {}

3059

3060

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

3061

global wnull

3062

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

3063

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

3064

# mode

3065

if debug or not foreground:

3066

wnull.close()

3067

3068

# Get client data and settings from last running state.

3069

if server_settings["restore"]:

3070

try:

3071

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

3072

if sys.version_info.major == 2:

3073

clients_data, old_client_settings = pickle.load(

3074

stored_state)

3075

else:

3076

bytes_clients_data, bytes_old_client_settings = (

3077

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

3078

### Fix bytes to strings

3079

## clients_data

3080

# .keys()

3081

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

3082

if isinstance(key, bytes)

3083

else key): value

3084

for key, value in

3085

bytes_clients_data.items() }

3086

del bytes_clients_data

3087

for key in clients_data:

3088

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

3089

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

3090

for k, v in

3091

clients_data[key].items() }

3092

clients_data[key] = value

3093

# .client_structure

3094

value["client_structure"] = [

3095

(s.decode("utf-8")

3096

if isinstance(s, bytes)

3097

else s) for s in

3098

value["client_structure"] ]

3099

# .name & .host

3100

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

3101

if isinstance(value[k], bytes):

3102

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

3103

## old_client_settings

3104

# .keys()

3105

old_client_settings = {

3106

(key.decode("utf-8")

3107

if isinstance(key, bytes)

3108

else key): value

3109

for key, value in

3110

bytes_old_client_settings.items() }

3111

del bytes_old_client_settings

3112

# .host

3113

for value in old_client_settings.values():

3114

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

3115

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

3116

.decode("utf-8"))

3117

os.remove(stored_state_path)

3118

except IOError as e:

3119

if e.errno == errno.ENOENT:

3120

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

3121

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

3122

else:

3123

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

3124

exc_info=e)

3125

raise

3126

except EOFError as e:

3127

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

3128

"EOFError:",

3129

exc_info=e)

3130

3131

with PGPEngine() as pgp:

3132

for client_name, client in clients_data.items():

3133

# Skip removed clients

3134

if client_name not in client_settings:

3135

continue

3136

3137

# Decide which value to use after restoring saved state.

3138

# We have three different values: Old config file,

3139

# new config file, and saved state.

3140

# New config value takes precedence if it differs from old

3141

# config value, otherwise use saved state.

3142

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

3143

try:

3144

# For each value in new config, check if it

3145

# differs from the old config value (Except for

3146

# the "secret" attribute)

3147

if (name != "secret"

3148

and (value !=

3149

old_client_settings[client_name][name])):

3150

client[name] = value

3151

except KeyError:

3152

pass

3153

3154

# Clients who has passed its expire date can still be

3155

# enabled if its last checker was successful. A Client

3156

# whose checker succeeded before we stored its state is

3157

# assumed to have successfully run all checkers during

3158

# downtime.

3159

if client["enabled"]:

3160

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

3161

if not client["last_checked_ok"]:

3162

logger.warning(

3163

"disabling client {} - Client never "

3164

"performed a successful checker".format(

3165

client_name))

3166

client["enabled"] = False

3167

elif client["last_checker_status"] != 0:

3168

logger.warning(

3169

"disabling client {} - Client last"

3170

" checker failed with error code"

3171

" {}".format(

3172

client_name,

3173

client["last_checker_status"]))

3174

client["enabled"] = False

3175

else:

3176

client["expires"] = (

3177

datetime.datetime.utcnow()

3178

+ client["timeout"])

3179

logger.debug("Last checker succeeded,"

3180

" keeping {} enabled".format(

3181

client_name))

1967

3182

try:

1968

yield (name, special_settings[name]())

1969

except KeyError:

1970

yield (name, value)

1971

1972

tcp_server.clients.update(set(

1973

client_class(name = section,

1974

config= dict(client_config_items(

1975

client_config, section)))

1976

for section in client_config.sections()))

3183

client["secret"] = pgp.decrypt(

3184

client["encrypted_secret"],

3185

client_settings[client_name]["secret"])

3186

except PGPError:

3187

# If decryption fails, we use secret from new settings

3188

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

3189

client_name))

3190

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

3191

["secret"])

3192

3193

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

3194

for client_name in (set(old_client_settings)

3195

- set(client_settings)):

3196

del clients_data[client_name]

3197

for client_name in (set(client_settings)

3198

- set(old_client_settings)):

3199

clients_data[client_name] = client_settings[client_name]

3200

3201

# Create all client objects

3202

for client_name, client in clients_data.items():

3203

tcp_server.clients[client_name] = client_class(

3204

name = client_name,

3205

settings = client,

3206

server_settings = server_settings)

3207

1977

3208

if not tcp_server.clients:

1978

3209

logger.warning("No clients defined")

1979

1980

if not debug:

1981

try:

1982

with pidfile:

1983

pid = os.getpid()

1984

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

1985

del pidfile

1986

except IOError:

1987

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

1988

pidfilename, pid)

1989

except NameError:

1990

# "pidfile" was never created

1991

pass

3210

3211

if not foreground:

3212

if pidfile is not None:

3213

pid = os.getpid()

3214

try:

3215

with pidfile:

3216

print(pid, file=pidfile)

3217

except IOError:

3218

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

3219

pidfilename, pid)

3220

del pidfile

1992

3221

del pidfilename

3222

3223

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

3224

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3225

lambda: main_loop.quit() and False)

3226

3227

if use_dbus:

1993

3228

1994

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

1995

1996

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

1997

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

1998

1999

if use_dbus:

2000

class MandosDBusService(dbus.service.Object):

3229

@alternate_dbus_interfaces(

3230

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

3231

class MandosDBusService(DBusObjectWithObjectManager):

2001

3232

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

3233

2002

3234

def __init__(self):

2003

3235

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

2004

_interface = "se.bsnet.fukt.Mandos"

3236

3237

_interface = "se.recompile.Mandos"

2005

3238

2006

3239

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

2007

3240

def ClientAdded(self, objpath):

2013

3246

"D-Bus signal"

2014

3247

pass

2015

3248

3249

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

3250

"true"})

2016

3251

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

2017

3252

def ClientRemoved(self, objpath, name):

2018

3253

"D-Bus signal"

2019

3254

pass

2020

3255

3256

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

3257

"true"})

2021

3258

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

2022

3259

def GetAllClients(self):

2023

3260

"D-Bus method"

2024

return dbus.Array(c.dbus_object_path

2025

for c in tcp_server.clients)

3261

return dbus.Array(c.dbus_object_path for c in

3262

tcp_server.clients.values())

2026

3263

3264

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

3265

"true"})

2027

3266

@dbus.service.method(_interface,

2028

3267

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

2029

3268

def GetAllClientsWithProperties(self):

2030

3269

"D-Bus method"

2031

3270

return dbus.Dictionary(

2032

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

2033

for c in tcp_server.clients),

3271

{ c.dbus_object_path: c.GetAll(

3272

"se.recompile.Mandos.Client")

3273

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

2034

3274

signature="oa{sv}")

2035

3275

2036

3276

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

2037

3277

def RemoveClient(self, object_path):

2038

3278

"D-Bus method"

2039

for c in tcp_server.clients:

3279

for c in tcp_server.clients.values():

2040

3280

if c.dbus_object_path == object_path:

2041

tcp_server.clients.remove(c)

3281

del tcp_server.clients[c.name]

2042

3282

c.remove_from_connection()

2043

# Don't signal anything except ClientRemoved

3283

# Don't signal the disabling

2044

3284

c.disable(quiet=True)

2045

# Emit D-Bus signal

2046

self.ClientRemoved(object_path, c.name)

3285

# Emit D-Bus signal for removal

3286

self.client_removed_signal(c)

2047

3287

return

2048

3288

raise KeyError(object_path)

2049

3289

2050

3290

del _interface

3291

3292

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3293

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

3294

def GetManagedObjects(self):

3295

"""D-Bus method"""

3296

return dbus.Dictionary(

3297

{ client.dbus_object_path:

3298

dbus.Dictionary(

3299

{ interface: client.GetAll(interface)

3300

for interface in

3301

client._get_all_interface_names()})

3302

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

3303

3304

def client_added_signal(self, client):

3305

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

3306

if use_dbus:

3307

# New standard signal

3308

self.InterfacesAdded(

3309

client.dbus_object_path,

3310

dbus.Dictionary(

3311

{ interface: client.GetAll(interface)

3312

for interface in

3313

client._get_all_interface_names()}))

3314

# Old signal

3315

self.ClientAdded(client.dbus_object_path)

3316

3317

def client_removed_signal(self, client):

3318

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

3319

if use_dbus:

3320

# New standard signal

3321

self.InterfacesRemoved(

3322

client.dbus_object_path,

3323

client._get_all_interface_names())

3324

# Old signal

3325

self.ClientRemoved(client.dbus_object_path,

3326

client.name)

2051

3327

2052

class MandosDBusServiceTransitional(MandosDBusService):

2053

__metaclass__ = transitional_dbus_metaclass

2054

mandos_dbus_service = MandosDBusServiceTransitional()

3328

mandos_dbus_service = MandosDBusService()

2055

3329

3330

# Save modules to variables to exempt the modules from being

3331

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

3332

mp = multiprocessing

3333

wn = wnull

2056

3334

def cleanup():

2057

3335

"Cleanup function; run on exit"

2058

service.cleanup()

2059

3336

if zeroconf:

3337

service.cleanup()

3338

3339

mp.active_children()

3340

wn.close()

3341

if not (tcp_server.clients or client_settings):

3342

return

3343

3344

# Store client before exiting. Secrets are encrypted with key

3345

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

3346

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

3347

clients = {}

3348

with PGPEngine() as pgp:

3349

for client in tcp_server.clients.values():

3350

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

3351

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

3352

key)

3353

client_dict = {}

3354

3355

# A list of attributes that can not be pickled

3356

# + secret.

3357

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

3358

"checker", "server_settings" }

3359

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

3360

.Object):

3361

exclude.add(name)

3362

3363

client_dict["encrypted_secret"] = (client

3364

.encrypted_secret)

3365

for attr in client.client_structure:

3366

if attr not in exclude:

3367

client_dict[attr] = getattr(client, attr)

3368

3369

clients[client.name] = client_dict

3370

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

3371

3372

try:

3373

with tempfile.NamedTemporaryFile(

3374

mode='wb',

3375

suffix=".pickle",

3376

prefix='clients-',

3377

dir=os.path.dirname(stored_state_path),

3378

delete=False) as stored_state:

3379

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

3380

protocol = 2)

3381

tempname = stored_state.name

3382

os.rename(tempname, stored_state_path)

3383

except (IOError, OSError) as e:

3384

if not debug:

3385

try:

3386

os.remove(tempname)

3387

except NameError:

3388

pass

3389

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

3390

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

3391

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

3392

else:

3393

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

3394

exc_info=e)

3395

raise

3396

3397

# Delete all clients, and settings from config

2060

3398

while tcp_server.clients:

2061

client = tcp_server.clients.pop()

3399

name, client = tcp_server.clients.popitem()

2062

3400

if use_dbus:

2063

3401

client.remove_from_connection()

2064

client.disable_hook = None

2065

# Don't signal anything except ClientRemoved

3402

# Don't signal the disabling

2066

3403

client.disable(quiet=True)

3404

# Emit D-Bus signal for removal

2067

3405

if use_dbus:

2068

# Emit D-Bus signal

2069

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2070

client.name)

3406

mandos_dbus_service.client_removed_signal(client)

3407

client_settings.clear()

2071

3408

2072

3409

atexit.register(cleanup)

2073

3410

2074

for client in tcp_server.clients:

3411

for client in tcp_server.clients.values():

2075

3412

if use_dbus:

2076

# Emit D-Bus signal

2077

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2078

client.enable()

3413

# Emit D-Bus signal for adding

3414

mandos_dbus_service.client_added_signal(client)

3415

# Need to initiate checking of clients

3416

if client.enabled:

3417

client.init_checker()

2079

3418

2080

3419

tcp_server.enable()

2081

3420

tcp_server.server_activate()

2082

3421

2083

3422

# Find out what port we got

2084

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

3423

if zeroconf:

3424

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

2085

3425

if use_ipv6:

2086

3426

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

2087

" flowinfo %d, scope_id %d"

2088

% tcp_server.socket.getsockname())

3427

" flowinfo %d, scope_id %d",

3428

*tcp_server.socket.getsockname())

2089

3429

else: # IPv4

2090

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

2091

% tcp_server.socket.getsockname())

3430

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

3431

*tcp_server.socket.getsockname())

2092

3432

2093

3433

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

2094

3434

2095

3435

try:

2096

# From the Avahi example code

2097

try:

2098

service.activate()

2099

except dbus.exceptions.DBusException as error:

2100

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

2101

cleanup()

2102

sys.exit(1)

2103

# End of Avahi example code

3436

if zeroconf:

3437

# From the Avahi example code

3438

try:

3439

service.activate()

3440

except dbus.exceptions.DBusException as error:

3441

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

3442

cleanup()

3443

sys.exit(1)

3444

# End of Avahi example code

2104

3445

2105

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

2106

lambda *args, **kwargs:

2107

(tcp_server.handle_request

2108

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

3446

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

3447

lambda *args, **kwargs:

3448

(tcp_server.handle_request

3449

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

2109

3450

2110

3451

logger.debug("Starting main loop")

2111

3452

main_loop.run()

2112

3453

except AvahiError as error:

2113

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

3454

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

2114

3455

cleanup()

2115

3456

sys.exit(1)

2116

3457

except KeyboardInterrupt: