/mandos/trunk : revision 493

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

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#

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# Everything else is

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#

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

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

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# along with this program. If not, see

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

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#

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

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

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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try:

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from future_builtins import *

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except ImportError:

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pass

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import SocketServer as socketserver

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import socket

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import argparse

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import datetime

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import errno

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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from gi.repository import GLib

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import gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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# Try to find the value of SO_BINDTODEVICE:

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try:

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

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

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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

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# Try running the C preprocessor:

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try:

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

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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

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

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.10"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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

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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet']

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

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

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

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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# Pretend that we have an Avahi module

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class Avahi(object):

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

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

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

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

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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def string_array_to_txt_array(self, t):

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

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

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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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avahi = Avahi()

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SO_BINDTODEVICE = None

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version = "1.3.1"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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102

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class AvahiError(Exception):

301

104

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

302

105

self.value = value

303

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

304

**kwargs)

305

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

107

def __unicode__(self):

108

return unicode(repr(self.value))

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109

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

322

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

137

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

347

141

self.interface = interface

348

142

self.name = name

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self.type = servicetype

358

152

self.server = None

359

153

self.bus = bus

360

154

self.entry_group_state_changed_match = None

361

362

def rename(self, remove=True):

155

def rename(self):

363

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

364

157

if self.rename_count >= self.max_renames:

365

158

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

366

159

" after %i retries, exiting.",

367

160

self.rename_count)

368

161

raise AvahiServiceError("Too many renames")

369

self.name = str(

370

self.server.GetAlternativeServiceName(self.name))

371

self.rename_count += 1

162

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

372

163

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

373

164

self.name)

374

if remove:

375

self.remove()

165

syslogger.setFormatter(logging.Formatter

166

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

167

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

168

% self.name))

169

self.remove()

376

170

try:

377

171

self.add()

378

172

except dbus.exceptions.DBusException as error:

379

if (error.get_dbus_name()

380

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

381

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

382

return self.rename(remove=False)

383

else:

384

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

385

self.cleanup()

386

os._exit(1)

387

173

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

174

self.cleanup()

175

os._exit(1)

176

self.rename_count += 1

388

177

def remove(self):

389

178

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

390

179

if self.entry_group_state_changed_match is not None:

392

181

self.entry_group_state_changed_match = None

393

182

if self.group is not None:

394

183

self.group.Reset()

395

396

184

def add(self):

397

185

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

398

186

self.remove()

403

191

avahi.DBUS_INTERFACE_ENTRY_GROUP)

404

192

self.entry_group_state_changed_match = (

405

193

self.group.connect_to_signal(

406

'StateChanged', self.entry_group_state_changed))

194

'StateChanged', self .entry_group_state_changed))

407

195

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

408

196

self.name, self.type)

409

197

self.group.AddService(

415

203

dbus.UInt16(self.port),

416

204

avahi.string_array_to_txt_array(self.TXT))

417

205

self.group.Commit()

418

419

206

def entry_group_state_changed(self, state, error):

420

207

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

421

208

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

427

214

self.rename()

428

215

elif state == avahi.ENTRY_GROUP_FAILURE:

429

216

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

430

str(error))

431

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

432

217

unicode(error))

218

raise AvahiGroupError("State changed: %s"

219

% unicode(error))

433

220

def cleanup(self):

434

221

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

435

222

if self.group is not None:

436

223

try:

437

224

self.group.Free()

438

225

except (dbus.exceptions.UnknownMethodException,

439

dbus.exceptions.DBusException):

226

dbus.exceptions.DBusException) as e:

440

227

pass

441

228

self.group = None

442

229

self.remove()

443

444

230

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

445

231

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

446

232

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

447

bad_states = {

448

avahi.SERVER_INVALID: "Zeroconf server invalid",

449

avahi.SERVER_REGISTERING: None,

450

avahi.SERVER_COLLISION: "Zeroconf server name collision",

451

avahi.SERVER_FAILURE: "Zeroconf server failure",

452

}

233

bad_states = { avahi.SERVER_INVALID:

234

"Zeroconf server invalid",

235

avahi.SERVER_REGISTERING: None,

236

avahi.SERVER_COLLISION:

237

"Zeroconf server name collision",

238

avahi.SERVER_FAILURE:

239

"Zeroconf server failure" }

453

240

if state in bad_states:

454

241

if bad_states[state] is not None:

455

242

if error is None:

458

245

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

459

246

self.cleanup()

460

247

elif state == avahi.SERVER_RUNNING:

461

try:

462

self.add()

463

except dbus.exceptions.DBusException as error:

464

if (error.get_dbus_name()

465

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

466

logger.info("Local Zeroconf service name"

467

" collision.")

468

return self.rename(remove=False)

469

else:

470

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

471

self.cleanup()

472

os._exit(1)

248

self.add()

473

249

else:

474

250

if error is None:

475

251

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

476

252

else:

477

253

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

478

479

254

def activate(self):

480

255

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

481

256

if self.server is None:

485

260

follow_name_owner_changes=True),

486

261

avahi.DBUS_INTERFACE_SERVER)

487

262

self.server.connect_to_signal("StateChanged",

488

self.server_state_changed)

263

self.server_state_changed)

489

264

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

490

265

491

266

492

class AvahiServiceToSyslog(AvahiService):

493

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

494

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

495

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

496

syslogger.setFormatter(logging.Formatter(

497

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

498

.format(self.name)))

499

return ret

500

501

# Pretend that we have a GnuTLS module

502

class GnuTLS(object):

503

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

504

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

505

506

_library = ctypes.cdll.LoadLibrary(

507

ctypes.util.find_library("gnutls"))

508

_need_version = b"3.3.0"

509

def __init__(self):

510

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

511

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

512

# happens.

513

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

514

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

515

.format(self._need_version))

516

517

# Unless otherwise indicated, the constants and types below are

518

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

519

520

# Constants

521

E_SUCCESS = 0

522

E_INTERRUPTED = -52

523

E_AGAIN = -28

524

CRT_OPENPGP = 2

525

CLIENT = 2

526

SHUT_RDWR = 0

527

CRD_CERTIFICATE = 1

528

E_NO_CERTIFICATE_FOUND = -49

529

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

530

531

# Types

532

class session_int(ctypes.Structure):

533

_fields_ = []

534

session_t = ctypes.POINTER(session_int)

535

class certificate_credentials_st(ctypes.Structure):

536

_fields_ = []

537

certificate_credentials_t = ctypes.POINTER(

538

certificate_credentials_st)

539

certificate_type_t = ctypes.c_int

540

class datum_t(ctypes.Structure):

541

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

542

('size', ctypes.c_uint)]

543

class openpgp_crt_int(ctypes.Structure):

544

_fields_ = []

545

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

546

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

547

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

548

credentials_type_t = ctypes.c_int

549

transport_ptr_t = ctypes.c_void_p

550

close_request_t = ctypes.c_int

551

552

# Exceptions

553

class Error(Exception):

554

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

555

# exception might be raised from within GnuTLS.__init__,

556

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

557

# global variable has happened.

558

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

559

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

560

# code is passed, convert it to a string with

561

# gnutls.strerror()

562

self.code = code

563

if message is None and code is not None:

564

message = GnuTLS.strerror(code)

565

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

566

message, *args)

567

568

class CertificateSecurityError(Error):

569

pass

570

571

# Classes

572

class Credentials(object):

573

def __init__(self):

574

self._c_object = gnutls.certificate_credentials_t()

575

gnutls.certificate_allocate_credentials(

576

ctypes.byref(self._c_object))

577

self.type = gnutls.CRD_CERTIFICATE

578

579

def __del__(self):

580

gnutls.certificate_free_credentials(self._c_object)

581

582

class ClientSession(object):

583

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

584

self._c_object = gnutls.session_t()

585

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

586

gnutls.set_default_priority(self._c_object)

587

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

588

gnutls.handshake_set_private_extensions(self._c_object,

589

True)

590

self.socket = socket

591

if credentials is None:

592

credentials = gnutls.Credentials()

593

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

594

ctypes.cast(credentials._c_object,

595

ctypes.c_void_p))

596

self.credentials = credentials

597

598

def __del__(self):

599

gnutls.deinit(self._c_object)

600

601

def handshake(self):

602

return gnutls.handshake(self._c_object)

603

604

def send(self, data):

605

data = bytes(data)

606

data_len = len(data)

607

while data_len > 0:

608

data_len -= gnutls.record_send(self._c_object,

609

data[-data_len:],

610

data_len)

611

612

def bye(self):

613

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

614

615

# Error handling functions

616

def _error_code(result):

617

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

618

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

619

if result >= 0:

620

return result

621

if result == gnutls.E_NO_CERTIFICATE_FOUND:

622

raise gnutls.CertificateSecurityError(code = result)

623

raise gnutls.Error(code = result)

624

625

def _retry_on_error(result, func, arguments):

626

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

627

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

628

while result < 0:

629

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

630

return _error_code(result)

631

result = func(*arguments)

632

return result

633

634

# Unless otherwise indicated, the function declarations below are

635

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

636

637

# Functions

638

priority_set_direct = _library.gnutls_priority_set_direct

639

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

640

ctypes.POINTER(ctypes.c_char_p)]

641

priority_set_direct.restype = _error_code

642

643

init = _library.gnutls_init

644

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

645

init.restype = _error_code

646

647

set_default_priority = _library.gnutls_set_default_priority

648

set_default_priority.argtypes = [session_t]

649

set_default_priority.restype = _error_code

650

651

record_send = _library.gnutls_record_send

652

record_send.argtypes = [session_t, ctypes.c_void_p,

653

ctypes.c_size_t]

654

record_send.restype = ctypes.c_ssize_t

655

record_send.errcheck = _retry_on_error

656

657

certificate_allocate_credentials = (

658

_library.gnutls_certificate_allocate_credentials)

659

certificate_allocate_credentials.argtypes = [

660

ctypes.POINTER(certificate_credentials_t)]

661

certificate_allocate_credentials.restype = _error_code

662

663

certificate_free_credentials = (

664

_library.gnutls_certificate_free_credentials)

665

certificate_free_credentials.argtypes = [certificate_credentials_t]

666

certificate_free_credentials.restype = None

667

668

handshake_set_private_extensions = (

669

_library.gnutls_handshake_set_private_extensions)

670

handshake_set_private_extensions.argtypes = [session_t,

671

ctypes.c_int]

672

handshake_set_private_extensions.restype = None

673

674

credentials_set = _library.gnutls_credentials_set

675

credentials_set.argtypes = [session_t, credentials_type_t,

676

ctypes.c_void_p]

677

credentials_set.restype = _error_code

678

679

strerror = _library.gnutls_strerror

680

strerror.argtypes = [ctypes.c_int]

681

strerror.restype = ctypes.c_char_p

682

683

certificate_type_get = _library.gnutls_certificate_type_get

684

certificate_type_get.argtypes = [session_t]

685

certificate_type_get.restype = _error_code

686

687

certificate_get_peers = _library.gnutls_certificate_get_peers

688

certificate_get_peers.argtypes = [session_t,

689

ctypes.POINTER(ctypes.c_uint)]

690

certificate_get_peers.restype = ctypes.POINTER(datum_t)

691

692

global_set_log_level = _library.gnutls_global_set_log_level

693

global_set_log_level.argtypes = [ctypes.c_int]

694

global_set_log_level.restype = None

695

696

global_set_log_function = _library.gnutls_global_set_log_function

697

global_set_log_function.argtypes = [log_func]

698

global_set_log_function.restype = None

699

700

deinit = _library.gnutls_deinit

701

deinit.argtypes = [session_t]

702

deinit.restype = None

703

704

handshake = _library.gnutls_handshake

705

handshake.argtypes = [session_t]

706

handshake.restype = _error_code

707

handshake.errcheck = _retry_on_error

708

709

transport_set_ptr = _library.gnutls_transport_set_ptr

710

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

711

transport_set_ptr.restype = None

712

713

bye = _library.gnutls_bye

714

bye.argtypes = [session_t, close_request_t]

715

bye.restype = _error_code

716

bye.errcheck = _retry_on_error

717

718

check_version = _library.gnutls_check_version

719

check_version.argtypes = [ctypes.c_char_p]

720

check_version.restype = ctypes.c_char_p

721

722

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

723

724

openpgp_crt_init = _library.gnutls_openpgp_crt_init

725

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

726

openpgp_crt_init.restype = _error_code

727

728

openpgp_crt_import = _library.gnutls_openpgp_crt_import

729

openpgp_crt_import.argtypes = [openpgp_crt_t,

730

ctypes.POINTER(datum_t),

731

openpgp_crt_fmt_t]

732

openpgp_crt_import.restype = _error_code

733

734

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

735

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

736

ctypes.POINTER(ctypes.c_uint)]

737

openpgp_crt_verify_self.restype = _error_code

738

739

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

740

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

741

openpgp_crt_deinit.restype = None

742

743

openpgp_crt_get_fingerprint = (

744

_library.gnutls_openpgp_crt_get_fingerprint)

745

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

746

ctypes.c_void_p,

747

ctypes.POINTER(

748

ctypes.c_size_t)]

749

openpgp_crt_get_fingerprint.restype = _error_code

750

751

# Remove non-public functions

752

del _error_code, _retry_on_error

753

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

754

gnutls = GnuTLS()

755

756

def call_pipe(connection, # : multiprocessing.Connection

757

func, *args, **kwargs):

758

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

759

760

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

761

return value on the provided multiprocessing.Connection.

762

"""

763

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

764

connection.close()

765

766

267

class Client(object):

767

268

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

768

269

769

270

Attributes:

770

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

271

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

771

272

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

772

273

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

773

274

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

774

275

to see if the client lives.

775

276

'None' if no process is running.

776

checker_callback_tag: a GLib event source tag, or None

277

checker_callback_tag: a gobject event source tag, or None

777

278

checker_command: string; External command which is run to check

778

279

if client lives. %() expansions are done at

779

280

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

780

281

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

781

checker_initiator_tag: a GLib event source tag, or None

282

checker_initiator_tag: a gobject event source tag, or None

782

283

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

783

client_structure: Object describing what attributes a client has

784

and is used for storing the client at exit

785

284

current_checker_command: string; current running checker_command

786

disable_initiator_tag: a GLib event source tag, or None

285

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

286

disable_initiator_tag: a gobject event source tag, or None

787

287

enabled: bool()

788

288

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

789

289

uniquely identify the client

791

291

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

792

292

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

793

293

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

794

last_checker_status: integer between 0 and 255 reflecting exit

795

status of last checker. -1 reflects crashed

796

checker, -2 means no checker completed yet.

797

last_checker_signal: The signal which killed the last checker, if

798

last_checker_status is -1

799

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

294

last_enabled: datetime.datetime(); (UTC)

800

295

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

801

296

D-Bus identifiers

802

297

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

803

298

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

804

299

until this client is disabled

805

extended_timeout: extra long timeout when secret has been sent

806

300

runtime_expansions: Allowed attributes for runtime expansion.

807

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

808

disabled, or None

809

server_settings: The server_settings dict from main()

810

301

"""

811

302

812

303

runtime_expansions = ("approval_delay", "approval_duration",

813

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

814

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

815

"last_approval_request", "last_checked_ok",

304

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

305

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

816

306

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

817

client_defaults = {

818

"timeout": "PT5M",

819

"extended_timeout": "PT15M",

820

"interval": "PT2M",

821

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

822

"host": "",

823

"approval_delay": "PT0S",

824

"approval_duration": "PT1S",

825

"approved_by_default": "True",

826

"enabled": "True",

827

}

828

307

829

308

@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):

309

def _timedelta_to_milliseconds(td):

310

"Convert a datetime.timedelta() to milliseconds"

311

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

312

+ (td.seconds * 1000)

313

+ (td.microseconds // 1000))

314

315

def timeout_milliseconds(self):

316

"Return the 'timeout' attribute in milliseconds"

317

return self._timedelta_to_milliseconds(self.timeout)

318

319

def interval_milliseconds(self):

320

"Return the 'interval' attribute in milliseconds"

321

return self._timedelta_to_milliseconds(self.interval)

322

323

def approval_delay_milliseconds(self):

324

return self._timedelta_to_milliseconds(self.approval_delay)

325

326

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

327

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

328

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

329

attribute."""

882

330

self.name = name

883

if server_settings is None:

884

server_settings = {}

885

self.server_settings = server_settings

886

# adding all client settings

887

for setting, value in settings.items():

888

setattr(self, setting, value)

889

890

if self.enabled:

891

if not hasattr(self, "last_enabled"):

892

self.last_enabled = datetime.datetime.utcnow()

893

if not hasattr(self, "expires"):

894

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

895

+ self.timeout)

896

else:

897

self.last_enabled = None

898

self.expires = None

899

331

if config is None:

332

config = {}

900

333

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

334

# Uppercase and remove spaces from fingerprint for later

335

# comparison purposes with return value from the fingerprint()

336

# function

337

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

338

.replace(" ", ""))

901

339

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

902

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

903

datetime.datetime.utcnow())

904

905

# attributes specific for this server instance

340

if "secret" in config:

341

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

342

elif "secfile" in config:

343

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

344

(config["secfile"])),

345

"rb") as secfile:

346

self.secret = secfile.read()

347

else:

348

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

349

% self.name)

350

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

351

self.created = datetime.datetime.utcnow()

352

self.enabled = False

353

self.last_approval_request = None

354

self.last_enabled = None

355

self.last_checked_ok = None

356

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

357

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

358

self.disable_hook = disable_hook

906

359

self.checker = None

907

360

self.checker_initiator_tag = None

908

361

self.disable_initiator_tag = None

909

362

self.checker_callback_tag = None

363

self.checker_command = config["checker"]

910

364

self.current_checker_command = None

911

self.approved = None

365

self.last_connect = None

366

self._approved = None

367

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

368

True)

912

369

self.approvals_pending = 0

913

self.changedstate = multiprocessing_manager.Condition(

914

multiprocessing_manager.Lock())

915

self.client_structure = [attr

916

for attr in self.__dict__.keys()

917

if not attr.startswith("_")]

918

self.client_structure.append("client_structure")

919

920

for name, t in inspect.getmembers(

921

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

922

if not name.startswith("_"):

923

self.client_structure.append(name)

370

self.approval_delay = string_to_delta(

371

config["approval_delay"])

372

self.approval_duration = string_to_delta(

373

config["approval_duration"])

374

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

924

375

925

# Send notice to process children that client state has changed

926

376

def send_changedstate(self):

927

with self.changedstate:

928

self.changedstate.notify_all()

929

377

self.changedstate.acquire()

378

self.changedstate.notify_all()

379

self.changedstate.release()

380

930

381

def enable(self):

931

382

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

932

383

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

933

384

# Already enabled

934

385

return

935

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

936

self.enabled = True

386

self.send_changedstate()

937

387

self.last_enabled = datetime.datetime.utcnow()

938

self.init_checker()

939

self.send_changedstate()

388

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

389

# and every interval from then on.

390

self.checker_initiator_tag = (gobject.timeout_add

391

(self.interval_milliseconds(),

392

self.start_checker))

393

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

394

self.disable_initiator_tag = (gobject.timeout_add

395

(self.timeout_milliseconds(),

396

self.disable))

397

self.enabled = True

398

# Also start a new checker *right now*.

399

self.start_checker()

940

400

941

401

def disable(self, quiet=True):

942

402

"""Disable this client."""

943

403

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

944

404

return False

945

405

if not quiet:

406

self.send_changedstate()

407

if not quiet:

946

408

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

947

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

948

GLib.source_remove(self.disable_initiator_tag)

409

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

410

gobject.source_remove(self.disable_initiator_tag)

949

411

self.disable_initiator_tag = None

950

self.expires = None

951

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

952

GLib.source_remove(self.checker_initiator_tag)

412

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

413

gobject.source_remove(self.checker_initiator_tag)

953

414

self.checker_initiator_tag = None

954

415

self.stop_checker()

416

if self.disable_hook:

417

self.disable_hook(self)

955

418

self.enabled = False

956

if not quiet:

957

self.send_changedstate()

958

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

419

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

959

420

return False

960

421

961

422

def __del__(self):

423

self.disable_hook = None

962

424

self.disable()

963

425

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):

426

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

982

427

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

983

428

self.checker_callback_tag = None

984

429

self.checker = None

985

# Read return code from connection (see call_pipe)

986

returncode = connection.recv()

987

connection.close()

988

989

if returncode >= 0:

990

self.last_checker_status = returncode

991

self.last_checker_signal = None

992

if self.last_checker_status == 0:

430

if os.WIFEXITED(condition):

431

exitstatus = os.WEXITSTATUS(condition)

432

if exitstatus == 0:

993

433

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

994

434

vars(self))

995

435

self.checked_ok()

996

436

else:

997

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

437

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

438

vars(self))

998

439

else:

999

self.last_checker_status = -1

1000

self.last_checker_signal = -returncode

1001

440

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

1002

441

vars(self))

1003

return False

1004

442

1005

443

def checked_ok(self):

1006

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

444

"""Bump up the timeout for this client.

445

446

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

447

alive and well.

448

"""

1007

449

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."""

1014

if timeout is None:

1015

timeout = self.timeout

1016

if self.disable_initiator_tag is not None:

1017

GLib.source_remove(self.disable_initiator_tag)

1018

self.disable_initiator_tag = None

1019

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

1020

self.disable_initiator_tag = GLib.timeout_add(

1021

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

1022

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

450

gobject.source_remove(self.disable_initiator_tag)

451

self.disable_initiator_tag = (gobject.timeout_add

452

(self.timeout_milliseconds(),

453

self.disable))

1023

454

1024

455

def need_approval(self):

1025

456

self.last_approval_request = datetime.datetime.utcnow()

1030

461

If a checker already exists, leave it running and do

1031

462

nothing."""

1032

463

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

1033

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

1034

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

1035

# would inevitably timeout, since no checker would get a

1036

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

464

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

465

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

466

# client would inevitably timeout, since no checker would get

467

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

1037

468

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

1038

469

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

1039

470

# should be.

1040

471

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

472

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

473

try:

474

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

475

except (AttributeError, OSError) as error:

476

if (isinstance(error, OSError)

477

and error.errno != errno.ECHILD):

478

raise error

479

else:

480

if pid:

481

logger.warning("Checker was a zombie")

482

gobject.source_remove(self.checker_callback_tag)

483

self.checker_callback(pid, status,

484

self.current_checker_command)

1045

485

# Start a new checker if needed

1046

486

if self.checker is None:

1047

# Escape attributes for the shell

1048

escaped_attrs = {

1049

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

1050

for attr in self.runtime_expansions }

1051

487

try:

1052

command = self.checker_command % escaped_attrs

1053

except TypeError as error:

1054

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

1055

self.checker_command,

1056

exc_info=error)

1057

return True # Try again later

488

# In case checker_command has exactly one % operator

489

command = self.checker_command % self.host

490

except TypeError:

491

# Escape attributes for the shell

492

escaped_attrs = dict(

493

(attr,

494

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

495

errors=

496

'replace')))

497

for attr in

498

self.runtime_expansions)

499

500

try:

501

command = self.checker_command % escaped_attrs

502

except TypeError as error:

503

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

504

' %s', self.checker_command, error)

505

return True # Try again later

1058

506

self.current_checker_command = command

1059

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

1060

self.name)

1061

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

1062

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

1063

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

1064

# always replaced by /dev/null.)

1065

# The exception is when not debugging but nevertheless

1066

# running in the foreground; use the previously

1067

# created wnull.

1068

popen_args = { "close_fds": True,

1069

"shell": True,

1070

"cwd": "/" }

1071

if (not self.server_settings["debug"]

1072

and self.server_settings["foreground"]):

1073

popen_args.update({"stdout": wnull,

1074

"stderr": wnull })

1075

pipe = multiprocessing.Pipe(duplex = False)

1076

self.checker = multiprocessing.Process(

1077

target = call_pipe,

1078

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

1079

kwargs = popen_args)

1080

self.checker.start()

1081

self.checker_callback_tag = GLib.io_add_watch(

1082

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

1083

self.checker_callback, pipe[0], command)

1084

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

507

try:

508

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

509

command, self.name)

510

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

511

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

512

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

513

# always replaced by /dev/null.)

514

self.checker = subprocess.Popen(command,

515

close_fds=True,

516

shell=True, cwd="/")

517

self.checker_callback_tag = (gobject.child_watch_add

518

(self.checker.pid,

519

self.checker_callback,

520

data=command))

521

# The checker may have completed before the gobject

522

# watch was added. Check for this.

523

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

524

if pid:

525

gobject.source_remove(self.checker_callback_tag)

526

self.checker_callback(pid, status, command)

527

except OSError as error:

528

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

529

error)

530

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

1085

531

return True

1086

532

1087

533

def stop_checker(self):

1088

534

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

1089

535

if self.checker_callback_tag:

1090

GLib.source_remove(self.checker_callback_tag)

536

gobject.source_remove(self.checker_callback_tag)

1091

537

self.checker_callback_tag = None

1092

538

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

1093

539

return

1094

540

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

1095

self.checker.terminate()

541

try:

542

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

543

#time.sleep(0.5)

544

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

545

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

546

except OSError as error:

547

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

548

raise

1096

549

self.checker = None

1097

550

1098

1099

def dbus_service_property(dbus_interface,

1100

signature="v",

1101

access="readwrite",

1102

byte_arrays=False):

551

def dbus_service_property(dbus_interface, signature="v",

552

access="readwrite", byte_arrays=False):

1103

553

"""Decorators for marking methods of a DBusObjectWithProperties to

1104

554

become properties on the D-Bus.

1105

555

1114

564

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

1115

565

if byte_arrays and signature != "ay":

1116

566

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

1117

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

1118

567

" signature %r" % signature)

1119

568

def decorator(func):

1120

569

func._dbus_is_property = True

1121

570

func._dbus_interface = dbus_interface

1126

575

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

1127

576

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1128

577

return func

1129

1130

return decorator

1131

1132

1133

def dbus_interface_annotations(dbus_interface):

1134

"""Decorator for marking functions returning interface annotations

1135

1136

Usage:

1137

1138

@dbus_interface_annotations("org.example.Interface")

1139

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

1140

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

1141

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

1142

"false"}

1143

"""

1144

1145

def decorator(func):

1146

func._dbus_is_interface = True

1147

func._dbus_interface = dbus_interface

1148

func._dbus_name = dbus_interface

1149

return func

1150

1151

return decorator

1152

1153

1154

def dbus_annotations(annotations):

1155

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

1156

Usage:

1157

1158

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

1159

"org.freedesktop.DBus.Property."

1160

"EmitsChangedSignal": "false"})

1161

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

1162

access="r")

1163

def Property_dbus_property(self):

1164

return dbus.Boolean(False)

1165

1166

See also the DBusObjectWithAnnotations class.

1167

"""

1168

1169

def decorator(func):

1170

func._dbus_annotations = annotations

1171

return func

1172

1173

578

return decorator

1174

579

1175

580

1176

581

class DBusPropertyException(dbus.exceptions.DBusException):

1177

582

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

1178

583

"""

1179

pass

584

def __unicode__(self):

585

return unicode(str(self))

1180

586

1181

587

1182

588

class DBusPropertyAccessException(DBusPropertyException):

1191

597

pass

1192

598

1193

599

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):

600

class DBusObjectWithProperties(dbus.service.Object):

1284

601

"""A D-Bus object with properties.

1285

602

1286

603

Classes inheriting from this can use the dbus_service_property

1287

604

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

1288

605

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

1289

606

"""

1290

607

608

@staticmethod

609

def _is_dbus_property(obj):

610

return getattr(obj, "_dbus_is_property", False)

611

612

def _get_all_dbus_properties(self):

613

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

614

"""

615

return ((prop._dbus_name, prop)

616

for name, prop in

617

inspect.getmembers(self, self._is_dbus_property))

618

1291

619

def _get_dbus_property(self, interface_name, property_name):

1292

620

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

1293

621

property with the specified name and interface.

1294

622

"""

1295

for cls in self.__class__.__mro__:

1296

for name, value in inspect.getmembers(

1297

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

1298

if (value._dbus_name == property_name

1299

and value._dbus_interface == interface_name):

1300

return value.__get__(self)

1301

623

for name in (property_name,

624

property_name + "_dbus_property"):

625

prop = getattr(self, name, None)

626

if (prop is None

627

or not self._is_dbus_property(prop)

628

or prop._dbus_name != property_name

629

or (interface_name and prop._dbus_interface

630

and interface_name != prop._dbus_interface)):

631

continue

632

return prop

1302

633

# No such property

1303

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

1304

self.dbus_object_path, interface_name, property_name))

1305

1306

@classmethod

1307

def _get_all_interface_names(cls):

1308

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

1309

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

1310

"_dbus_interface", None)

1311

for x in (inspect.getmro(cls))

1312

for attr in dir(x))

1313

if name is not None)

1314

1315

@dbus.service.method(dbus.PROPERTIES_IFACE,

1316

in_signature="ss",

634

raise DBusPropertyNotFound(self.dbus_object_path + ":"

635

+ interface_name + "."

636

+ property_name)

637

638

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

1317

639

out_signature="v")

1318

640

def Get(self, interface_name, property_name):

1319

641

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

1337

659

# The byte_arrays option is not supported yet on

1338

660

# signatures other than "ay".

1339

661

if prop._dbus_signature != "ay":

1340

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

1341

"'ay' signature {!r}"

1342

.format(prop._dbus_signature))

1343

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

1344

for byte in value))

662

raise ValueError

663

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

664

for byte in value))

1345

665

prop(value)

1346

666

1347

@dbus.service.method(dbus.PROPERTIES_IFACE,

1348

in_signature="s",

667

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

1349

668

out_signature="a{sv}")

1350

669

def GetAll(self, interface_name):

1351

670

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

1352

671

standard.

1353

672

1354

673

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

1355

674

"""

1356

properties = {}

1357

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

675

all = {}

676

for name, prop in self._get_all_dbus_properties():

1358

677

if (interface_name

1359

678

and interface_name != prop._dbus_interface):

1360

679

# Interface non-empty but did not match

1364

683

continue

1365

684

value = prop()

1366

685

if not hasattr(value, "variant_level"):

1367

properties[name] = value

686

all[name] = value

1368

687

continue

1369

properties[name] = type(value)(

1370

value, variant_level = value.variant_level + 1)

1371

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

1372

1373

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

1374

def PropertiesChanged(self, interface_name, changed_properties,

1375

invalidated_properties):

1376

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

1377

standard.

1378

"""

1379

pass

688

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

689

value.variant_level+1)

690

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

1380

691

1381

692

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1382

693

out_signature="s",

1383

694

path_keyword='object_path',

1384

695

connection_keyword='connection')

1385

696

def Introspect(self, object_path, connection):

1386

"""Overloading of standard D-Bus method.

1387

1388

Inserts property tags and interface annotation tags.

697

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

1389

698

"""

1390

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1391

object_path,

1392

connection)

699

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

700

connection)

1393

701

try:

1394

702

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

1395

1396

703

def make_tag(document, name, prop):

1397

704

e = document.createElement("property")

1398

705

e.setAttribute("name", name)

1399

706

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

1400

707

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

1401

708

return e

1402

1403

709

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

1404

# Add property tags

1405

710

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

1406

711

for name, prop

1407

in self._get_all_dbus_things("property")

712

in self._get_all_dbus_properties()

1408

713

if prop._dbus_interface

1409

714

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

1410

715

if_tag.appendChild(tag)

1411

# Add annotation tags for properties

1412

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

1413

annots = dict()

1414

for name, prop in self._get_all_dbus_things(

1415

"property"):

1416

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

1417

and prop._dbus_interface

1418

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

1419

annots.update(getattr(

1420

prop, "_dbus_annotations", {}))

1421

for name, value in annots.items():

1422

ann_tag = document.createElement(

1423

"annotation")

1424

ann_tag.setAttribute("name", name)

1425

ann_tag.setAttribute("value", value)

1426

tag.appendChild(ann_tag)

1427

716

# Add the names to the return values for the

1428

717

# "org.freedesktop.DBus.Properties" methods

1429

718

if (if_tag.getAttribute("name")

1444

733

except (AttributeError, xml.dom.DOMException,

1445

734

xml.parsers.expat.ExpatError) as error:

1446

735

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

1447

exc_info=error)

1448

return xmlstring

1449

1450

try:

1451

dbus.OBJECT_MANAGER_IFACE

1452

except AttributeError:

1453

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

1454

1455

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1456

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

1457

1458

Classes inheriting from this exposes the standard

1459

GetManagedObjects call and the InterfacesAdded and

1460

InterfacesRemoved signals on the standard

1461

"org.freedesktop.DBus.ObjectManager" interface.

1462

1463

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

1464

manually.

1465

"""

1466

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1467

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

1468

def GetManagedObjects(self):

1469

"""This function must be overridden"""

1470

raise NotImplementedError()

1471

1472

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1473

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

1474

def InterfacesAdded(self, object_path, interfaces_and_properties):

1475

pass

1476

1477

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

1478

def InterfacesRemoved(self, object_path, interfaces):

1479

pass

1480

1481

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1482

out_signature = "s",

1483

path_keyword = 'object_path',

1484

connection_keyword = 'connection')

1485

def Introspect(self, object_path, connection):

1486

"""Overloading of standard D-Bus method.

1487

1488

Override return argument name of GetManagedObjects to be

1489

"objpath_interfaces_and_properties"

1490

"""

1491

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1492

object_path,

1493

connection)

1494

try:

1495

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

1496

1497

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

1498

# Fix argument name for the GetManagedObjects method

1499

if (if_tag.getAttribute("name")

1500

== dbus.OBJECT_MANAGER_IFACE):

1501

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

1502

if (cn.getAttribute("name")

1503

== "GetManagedObjects"):

1504

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

1505

if (arg.getAttribute("direction")

1506

== "out"):

1507

arg.setAttribute(

1508

"name",

1509

"objpath_interfaces"

1510

"_and_properties")

1511

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

1512

document.unlink()

1513

except (AttributeError, xml.dom.DOMException,

1514

xml.parsers.expat.ExpatError) as error:

1515

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

1516

exc_info = error)

1517

return xmlstring

1518

1519

def datetime_to_dbus(dt, variant_level=0):

1520

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

1521

if dt is None:

1522

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

1523

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

1524

1525

1526

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1527

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

1528

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

1529

interface names according to the "alt_interface_names" mapping.

1530

Usage:

1531

1532

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

1533

"net.example.AlternateInterface"})

1534

class SampleDBusObject(dbus.service.Object):

1535

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

1536

def SampleDBusMethod():

1537

pass

1538

1539

The above "SampleDBusMethod" on "SampleDBusObject" will be

1540

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

1541

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

1542

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

1543

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

1544

1545

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

1546

(from DBusObjectWithProperties) and interfaces (from the

1547

dbus_interface_annotations decorator).

1548

"""

1549

1550

def wrapper(cls):

1551

for orig_interface_name, alt_interface_name in (

1552

alt_interface_names.items()):

1553

attr = {}

1554

interface_names = set()

1555

# Go though all attributes of the class

1556

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

1557

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

1558

# with the wrong interface name

1559

if (not hasattr(attribute, "_dbus_interface")

1560

or not attribute._dbus_interface.startswith(

1561

orig_interface_name)):

1562

continue

1563

# Create an alternate D-Bus interface name based on

1564

# the current name

1565

alt_interface = attribute._dbus_interface.replace(

1566

orig_interface_name, alt_interface_name)

1567

interface_names.add(alt_interface)

1568

# Is this a D-Bus signal?

1569

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

1570

# Extract the original non-method undecorated

1571

# function by black magic

1572

if sys.version_info.major == 2:

1573

nonmethod_func = (dict(

1574

zip(attribute.func_code.co_freevars,

1575

attribute.__closure__))

1576

["func"].cell_contents)

1577

else:

1578

nonmethod_func = (dict(

1579

zip(attribute.__code__.co_freevars,

1580

attribute.__closure__))

1581

["func"].cell_contents)

1582

# Create a new, but exactly alike, function

1583

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

1584

# with the alternate D-Bus interface name

1585

new_function = copy_function(nonmethod_func)

1586

new_function = (dbus.service.signal(

1587

alt_interface,

1588

attribute._dbus_signature)(new_function))

1589

# Copy annotations, if any

1590

try:

1591

new_function._dbus_annotations = dict(

1592

attribute._dbus_annotations)

1593

except AttributeError:

1594

pass

1595

# Define a creator of a function to call both the

1596

# original and alternate functions, so both the

1597

# original and alternate signals gets sent when

1598

# the function is called

1599

def fixscope(func1, func2):

1600

"""This function is a scope container to pass

1601

func1 and func2 to the "call_both" function

1602

outside of its arguments"""

1603

1604

@functools.wraps(func2)

1605

def call_both(*args, **kwargs):

1606

"""This function will emit two D-Bus

1607

signals by calling func1 and func2"""

1608

func1(*args, **kwargs)

1609

func2(*args, **kwargs)

1610

# Make wrapper function look like a D-Bus signal

1611

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

1612

if name.startswith("_dbus_"):

1613

setattr(call_both, name, attr)

1614

1615

return call_both

1616

# Create the "call_both" function and add it to

1617

# the class

1618

attr[attrname] = fixscope(attribute, new_function)

1619

# Is this a D-Bus method?

1620

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

1621

# Create a new, but exactly alike, function

1622

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

1623

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

1624

# to the class.

1625

attr[attrname] = (

1626

dbus.service.method(

1627

alt_interface,

1628

attribute._dbus_in_signature,

1629

attribute._dbus_out_signature)

1630

(copy_function(attribute)))

1631

# Copy annotations, if any

1632

try:

1633

attr[attrname]._dbus_annotations = dict(

1634

attribute._dbus_annotations)

1635

except AttributeError:

1636

pass

1637

# Is this a D-Bus property?

1638

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

1639

# Create a new, but exactly alike, function

1640

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

1641

# property with the alternate D-Bus interface

1642

# name. Add it to the class.

1643

attr[attrname] = (dbus_service_property(

1644

alt_interface, attribute._dbus_signature,

1645

attribute._dbus_access,

1646

attribute._dbus_get_args_options

1647

["byte_arrays"])

1648

(copy_function(attribute)))

1649

# Copy annotations, if any

1650

try:

1651

attr[attrname]._dbus_annotations = dict(

1652

attribute._dbus_annotations)

1653

except AttributeError:

1654

pass

1655

# Is this a D-Bus interface?

1656

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

1657

# Create a new, but exactly alike, function

1658

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

1659

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

1660

# to the class.

1661

attr[attrname] = (

1662

dbus_interface_annotations(alt_interface)

1663

(copy_function(attribute)))

1664

if deprecate:

1665

# Deprecate all alternate interfaces

1666

iname="_AlternateDBusNames_interface_annotation{}"

1667

for interface_name in interface_names:

1668

1669

@dbus_interface_annotations(interface_name)

1670

def func(self):

1671

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

1672

"true" }

1673

# Find an unused name

1674

for aname in (iname.format(i)

1675

for i in itertools.count()):

1676

if aname not in attr:

1677

attr[aname] = func

1678

break

1679

if interface_names:

1680

# Replace the class with a new subclass of it with

1681

# methods, signals, etc. as created above.

1682

if sys.version_info.major == 2:

1683

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

1684

(cls, ), attr)

1685

else:

1686

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

1687

(cls, ), attr)

1688

return cls

1689

1690

return wrapper

1691

1692

1693

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

1694

"se.bsnet.fukt.Mandos"})

736

error)

737

return xmlstring

738

739

1695

740

class ClientDBus(Client, DBusObjectWithProperties):

1696

741

"""A Client class using D-Bus

1697

742

1701

746

"""

1702

747

1703

748

runtime_expansions = (Client.runtime_expansions

1704

+ ("dbus_object_path", ))

1705

1706

_interface = "se.recompile.Mandos.Client"

749

+ ("dbus_object_path",))

1707

750

1708

751

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

1709

752

1710

753

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

754

self._approvals_pending = 0

1711

755

self.bus = bus

1712

756

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

1713

757

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

1714

758

# the D-Bus

1715

client_object_name = str(self.name).translate(

759

client_object_name = unicode(self.name).translate(

1716

760

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

1717

761

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

1718

self.dbus_object_path = dbus.ObjectPath(

1719

"/clients/" + client_object_name)

762

self.dbus_object_path = (dbus.ObjectPath

763

("/clients/" + client_object_name))

1720

764

DBusObjectWithProperties.__init__(self, self.bus,

1721

765

self.dbus_object_path)

1722

1723

def notifychangeproperty(transform_func, dbus_name,

1724

type_func=lambda x: x,

1725

variant_level=1,

1726

invalidate_only=False,

1727

_interface=_interface):

1728

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

1729

its changes to DBus.

1730

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

1734

type_func: Function that transform the value before sending it

1735

to the D-Bus. Default: no transform

1736

variant_level: D-Bus variant level. Default: 1

1737

"""

1738

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

1739

1740

def setter(self, value):

1741

if hasattr(self, "dbus_object_path"):

1742

if (not hasattr(self, attrname) or

1743

type_func(getattr(self, attrname, None))

1744

!= type_func(value)):

1745

if invalidate_only:

1746

self.PropertiesChanged(

1747

_interface, dbus.Dictionary(),

1748

dbus.Array((dbus_name, )))

1749

else:

1750

dbus_value = transform_func(

1751

type_func(value),

1752

variant_level = variant_level)

1753

self.PropertyChanged(dbus.String(dbus_name),

1754

dbus_value)

1755

self.PropertiesChanged(

1756

_interface,

1757

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

1758

dbus_value }),

1759

dbus.Array())

1760

setattr(self, attrname, value)

1761

1762

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

1763

1764

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1765

approvals_pending = notifychangeproperty(dbus.Boolean,

1766

"ApprovalPending",

1767

type_func = bool)

1768

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

1769

last_enabled = notifychangeproperty(datetime_to_dbus,

1770

"LastEnabled")

1771

checker = notifychangeproperty(

1772

dbus.Boolean, "CheckerRunning",

1773

type_func = lambda checker: checker is not None)

1774

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1775

"LastCheckedOK")

1776

last_checker_status = notifychangeproperty(dbus.Int16,

1777

"LastCheckerStatus")

1778

last_approval_request = notifychangeproperty(

1779

datetime_to_dbus, "LastApprovalRequest")

1780

approved_by_default = notifychangeproperty(dbus.Boolean,

1781

"ApprovedByDefault")

1782

approval_delay = notifychangeproperty(

1783

dbus.UInt64, "ApprovalDelay",

1784

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

1785

approval_duration = notifychangeproperty(

1786

dbus.UInt64, "ApprovalDuration",

1787

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

1788

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

1789

timeout = notifychangeproperty(

1790

dbus.UInt64, "Timeout",

1791

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

1792

extended_timeout = notifychangeproperty(

1793

dbus.UInt64, "ExtendedTimeout",

1794

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

1795

interval = notifychangeproperty(

1796

dbus.UInt64, "Interval",

1797

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

1798

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

1799

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

1800

invalidate_only=True)

1801

1802

del notifychangeproperty

766

767

def _get_approvals_pending(self):

768

return self._approvals_pending

769

def _set_approvals_pending(self, value):

770

old_value = self._approvals_pending

771

self._approvals_pending = value

772

bval = bool(value)

773

if (hasattr(self, "dbus_object_path")

774

and bval is not bool(old_value)):

775

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

776

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

777

dbus_bool)

778

779

approvals_pending = property(_get_approvals_pending,

780

_set_approvals_pending)

781

del _get_approvals_pending, _set_approvals_pending

782

783

@staticmethod

784

def _datetime_to_dbus(dt, variant_level=0):

785

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

786

return dbus.String(dt.isoformat(),

787

variant_level=variant_level)

788

789

def enable(self):

790

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

791

r = Client.enable(self)

792

if oldstate != self.enabled:

793

# Emit D-Bus signals

794

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

795

dbus.Boolean(True, variant_level=1))

796

self.PropertyChanged(

797

dbus.String("LastEnabled"),

798

self._datetime_to_dbus(self.last_enabled,

799

variant_level=1))

800

return r

801

802

def disable(self, quiet = False):

803

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

804

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

805

if not quiet and oldstate != self.enabled:

806

# Emit D-Bus signal

807

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

808

dbus.Boolean(False, variant_level=1))

809

return r

1803

810

1804

811

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

1805

812

try:

1810

817

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

1811

818

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

1812

819

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:

820

def checker_callback(self, pid, condition, command,

821

*args, **kwargs):

822

self.checker_callback_tag = None

823

self.checker = None

824

# Emit D-Bus signal

825

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

826

dbus.Boolean(False, variant_level=1))

827

if os.WIFEXITED(condition):

828

exitstatus = os.WEXITSTATUS(condition)

1820

829

# Emit D-Bus signal

1821

830

self.CheckerCompleted(dbus.Int16(exitstatus),

1822

# This is specific to GNU libC

1823

dbus.Int64(exitstatus << 8),

831

dbus.Int64(condition),

1824

832

dbus.String(command))

1825

833

else:

1826

834

# Emit D-Bus signal

1827

835

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

1828

dbus.Int64(

1829

# This is specific to GNU libC

1830

(exitstatus << 8)

1831

| self.last_checker_signal),

836

dbus.Int64(condition),

1832

837

dbus.String(command))

1833

return ret

838

839

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

840

*args, **kwargs)

841

842

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

843

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

844

# Emit D-Bus signal

845

self.PropertyChanged(

846

dbus.String("LastCheckedOK"),

847

(self._datetime_to_dbus(self.last_checked_ok,

848

variant_level=1)))

849

850

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

851

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

852

# Emit D-Bus signal

853

self.PropertyChanged(

854

dbus.String("LastApprovalRequest"),

855

(self._datetime_to_dbus(self.last_approval_request,

856

variant_level=1)))

857

return r

1834

858

1835

859

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

1836

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

860

old_checker = self.checker

861

if self.checker is not None:

862

old_checker_pid = self.checker.pid

863

else:

864

old_checker_pid = None

1837

865

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

1838

866

# Only if new checker process was started

1839

867

if (self.checker is not None

1840

868

and old_checker_pid != self.checker.pid):

1841

869

# Emit D-Bus signal

1842

870

self.CheckerStarted(self.current_checker_command)

871

self.PropertyChanged(

872

dbus.String("CheckerRunning"),

873

dbus.Boolean(True, variant_level=1))

1843

874

return r

1844

875

876

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

877

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

878

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

879

if (old_checker is not None

880

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

881

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

882

dbus.Boolean(False, variant_level=1))

883

return r

884

1845

885

def _reset_approved(self):

1846

self.approved = None

886

self._approved = None

1847

887

return False

1848

888

1849

889

def approve(self, value=True):

1850

self.approved = value

1851

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

1852

* 1000), self._reset_approved)

1853

890

self.send_changedstate()

891

self._approved = value

892

gobject.timeout_add(self._timedelta_to_milliseconds

893

(self.approval_duration),

894

self._reset_approved)

895

1854

896

1855

897

## D-Bus methods, signals & properties

1856

1857

## Interfaces

898

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

1858

899

1859

900

## Signals

1860

901

1871

912

pass

1872

913

1873

914

# PropertyChanged - signal

1874

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

1875

915

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

1876

916

def PropertyChanged(self, property, value):

1877

917

"D-Bus signal"

1911

951

self.checked_ok()

1912

952

1913

953

# Enable - method

1914

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

1915

954

@dbus.service.method(_interface)

1916

955

def Enable(self):

1917

956

"D-Bus method"

1918

957

self.enable()

1919

958

1920

959

# StartChecker - method

1921

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

1922

960

@dbus.service.method(_interface)

1923

961

def StartChecker(self):

1924

962

"D-Bus method"

1925

963

self.start_checker()

1926

964

1927

965

# Disable - method

1928

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

1929

966

@dbus.service.method(_interface)

1930

967

def Disable(self):

1931

968

"D-Bus method"

1932

969

self.disable()

1933

970

1934

971

# StopChecker - method

1935

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

1936

972

@dbus.service.method(_interface)

1937

973

def StopChecker(self):

1938

974

self.stop_checker()

1945

981

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

1946

982

1947

983

# ApprovedByDefault - property

1948

@dbus_service_property(_interface,

1949

signature="b",

984

@dbus_service_property(_interface, signature="b",

1950

985

access="readwrite")

1951

986

def ApprovedByDefault_dbus_property(self, value=None):

1952

987

if value is None: # get

1953

988

return dbus.Boolean(self.approved_by_default)

1954

989

self.approved_by_default = bool(value)

990

# Emit D-Bus signal

991

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

992

dbus.Boolean(value, variant_level=1))

1955

993

1956

994

# ApprovalDelay - property

1957

@dbus_service_property(_interface,

1958

signature="t",

995

@dbus_service_property(_interface, signature="t",

1959

996

access="readwrite")

1960

997

def ApprovalDelay_dbus_property(self, value=None):

1961

998

if value is None: # get

1962

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

1963

* 1000)

999

return dbus.UInt64(self.approval_delay_milliseconds())

1964

1000

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

1001

# Emit D-Bus signal

1002

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

1003

dbus.UInt64(value, variant_level=1))

1965

1004

1966

1005

# ApprovalDuration - property

1967

@dbus_service_property(_interface,

1968

signature="t",

1006

@dbus_service_property(_interface, signature="t",

1969

1007

access="readwrite")

1970

1008

def ApprovalDuration_dbus_property(self, value=None):

1971

1009

if value is None: # get

1972

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

1973

* 1000)

1010

return dbus.UInt64(self._timedelta_to_milliseconds(

1011

self.approval_duration))

1974

1012

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

1013

# Emit D-Bus signal

1014

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

1015

dbus.UInt64(value, variant_level=1))

1975

1016

1976

1017

# Name - property

1977

@dbus_annotations(

1978

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

1979

1018

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

1980

1019

def Name_dbus_property(self):

1981

1020

return dbus.String(self.name)

1982

1021

1983

1022

# Fingerprint - property

1984

@dbus_annotations(

1985

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

1986

1023

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

1987

1024

def Fingerprint_dbus_property(self):

1988

1025

return dbus.String(self.fingerprint)

1989

1026

1990

1027

# Host - property

1991

@dbus_service_property(_interface,

1992

signature="s",

1028

@dbus_service_property(_interface, signature="s",

1993

1029

access="readwrite")

1994

1030

def Host_dbus_property(self, value=None):

1995

1031

if value is None: # get

1996

1032

return dbus.String(self.host)

1997

self.host = str(value)

1033

self.host = value

1034

# Emit D-Bus signal

1035

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

1036

dbus.String(value, variant_level=1))

1998

1037

1999

1038

# Created - property

2000

@dbus_annotations(

2001

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

2002

1039

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

2003

1040

def Created_dbus_property(self):

2004

return datetime_to_dbus(self.created)

1041

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

2005

1042

2006

1043

# LastEnabled - property

2007

1044

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

2008

1045

def LastEnabled_dbus_property(self):

2009

return datetime_to_dbus(self.last_enabled)

1046

if self.last_enabled is None:

1047

return dbus.String("")

1048

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

2010

1049

2011

1050

# Enabled - property

2012

@dbus_service_property(_interface,

2013

signature="b",

1051

@dbus_service_property(_interface, signature="b",

2014

1052

access="readwrite")

2015

1053

def Enabled_dbus_property(self, value=None):

2016

1054

if value is None: # get

2021

1059

self.disable()

2022

1060

2023

1061

# LastCheckedOK - property

2024

@dbus_service_property(_interface,

2025

signature="s",

1062

@dbus_service_property(_interface, signature="s",

2026

1063

access="readwrite")

2027

1064

def LastCheckedOK_dbus_property(self, value=None):

2028

1065

if value is not None:

2029

1066

self.checked_ok()

2030

1067

return

2031

return datetime_to_dbus(self.last_checked_ok)

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

2038

# Expires - property

2039

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

2040

def Expires_dbus_property(self):

2041

return datetime_to_dbus(self.expires)

1068

if self.last_checked_ok is None:

1069

return dbus.String("")

1070

return dbus.String(self._datetime_to_dbus(self

1071

.last_checked_ok))

2042

1072

2043

1073

# LastApprovalRequest - property

2044

1074

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

2045

1075

def LastApprovalRequest_dbus_property(self):

2046

return datetime_to_dbus(self.last_approval_request)

1076

if self.last_approval_request is None:

1077

return dbus.String("")

1078

return dbus.String(self.

1079

_datetime_to_dbus(self

1080

.last_approval_request))

2047

1081

2048

1082

# Timeout - property

2049

@dbus_service_property(_interface,

2050

signature="t",

1083

@dbus_service_property(_interface, signature="t",

2051

1084

access="readwrite")

2052

1085

def Timeout_dbus_property(self, value=None):

2053

1086

if value is None: # get

2054

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

2055

old_timeout = self.timeout

1087

return dbus.UInt64(self.timeout_milliseconds())

2056

1088

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

2057

# Reschedule disabling

2058

if self.enabled:

2059

now = datetime.datetime.utcnow()

2060

self.expires += self.timeout - old_timeout

2061

if self.expires <= now:

2062

# The timeout has passed

2063

self.disable()

2064

else:

2065

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

2066

is None):

2067

return

2068

GLib.source_remove(self.disable_initiator_tag)

2069

self.disable_initiator_tag = GLib.timeout_add(

2070

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

2071

self.disable)

2072

2073

# ExtendedTimeout - property

2074

@dbus_service_property(_interface,

2075

signature="t",

2076

access="readwrite")

2077

def ExtendedTimeout_dbus_property(self, value=None):

2078

if value is None: # get

2079

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

2080

* 1000)

2081

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

1089

# Emit D-Bus signal

1090

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

1091

dbus.UInt64(value, variant_level=1))

1092

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

1093

return

1094

# Reschedule timeout

1095

gobject.source_remove(self.disable_initiator_tag)

1096

self.disable_initiator_tag = None

1097

time_to_die = (self.

1098

_timedelta_to_milliseconds((self

1099

.last_checked_ok

1100

+ self.timeout)

1101

- datetime.datetime

1102

.utcnow()))

1103

if time_to_die <= 0:

1104

# The timeout has passed

1105

self.disable()

1106

else:

1107

self.disable_initiator_tag = (gobject.timeout_add

1108

(time_to_die, self.disable))

2082

1109

2083

1110

# Interval - property

2084

@dbus_service_property(_interface,

2085

signature="t",

1111

@dbus_service_property(_interface, signature="t",

2086

1112

access="readwrite")

2087

1113

def Interval_dbus_property(self, value=None):

2088

1114

if value is None: # get

2089

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

1115

return dbus.UInt64(self.interval_milliseconds())

2090

1116

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

1117

# Emit D-Bus signal

1118

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

1119

dbus.UInt64(value, variant_level=1))

2091

1120

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

2092

1121

return

2093

if self.enabled:

2094

# Reschedule checker run

2095

GLib.source_remove(self.checker_initiator_tag)

2096

self.checker_initiator_tag = GLib.timeout_add(

2097

value, self.start_checker)

2098

self.start_checker() # Start one now, too

2099

1122

# Reschedule checker run

1123

gobject.source_remove(self.checker_initiator_tag)

1124

self.checker_initiator_tag = (gobject.timeout_add

1125

(value, self.start_checker))

1126

self.start_checker() # Start one now, too

1127

2100

1128

# Checker - property

2101

@dbus_service_property(_interface,

2102

signature="s",

1129

@dbus_service_property(_interface, signature="s",

2103

1130

access="readwrite")

2104

1131

def Checker_dbus_property(self, value=None):

2105

1132

if value is None: # get

2106

1133

return dbus.String(self.checker_command)

2107

self.checker_command = str(value)

1134

self.checker_command = value

1135

# Emit D-Bus signal

1136

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

1137

dbus.String(self.checker_command,

1138

variant_level=1))

2108

1139

2109

1140

# CheckerRunning - property

2110

@dbus_service_property(_interface,

2111

signature="b",

1141

@dbus_service_property(_interface, signature="b",

2112

1142

access="readwrite")

2113

1143

def CheckerRunning_dbus_property(self, value=None):

2114

1144

if value is None: # get

2119

1149

self.stop_checker()

2120

1150

2121

1151

# ObjectPath - property

2122

@dbus_annotations(

2123

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

2124

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

2125

1152

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

2126

1153

def ObjectPath_dbus_property(self):

2127

1154

return self.dbus_object_path # is already a dbus.ObjectPath

2128

1155

2129

1156

# Secret = property

2130

@dbus_annotations(

2131

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

2132

"invalidates"})

2133

@dbus_service_property(_interface,

2134

signature="ay",

2135

access="write",

2136

byte_arrays=True)

1157

@dbus_service_property(_interface, signature="ay",

1158

access="write", byte_arrays=True)

2137

1159

def Secret_dbus_property(self, value):

2138

self.secret = bytes(value)

1160

self.secret = str(value)

2139

1161

2140

1162

del _interface

2141

1163

2145

1167

self._pipe = child_pipe

2146

1168

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

2147

1169

if not self._pipe.recv():

2148

raise KeyError(fpr)

2149

1170

raise KeyError()

1171

2150

1172

def __getattribute__(self, name):

2151

if name == '_pipe':

1173

if(name == '_pipe'):

2152

1174

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

2153

1175

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

2154

1176

data = self._pipe.recv()

2155

1177

if data[0] == 'data':

2156

1178

return data[1]

2157

1179

if data[0] == 'function':

2158

2159

1180

def func(*args, **kwargs):

2160

1181

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

2161

1182

return self._pipe.recv()[1]

2162

2163

1183

return func

2164

1184

2165

1185

def __setattr__(self, name, value):

2166

if name == '_pipe':

1186

if(name == '_pipe'):

2167

1187

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

2168

1188

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

2169

1189

2177

1197

def handle(self):

2178

1198

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

2179

1199

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

2180

str(self.client_address))

1200

unicode(self.client_address))

2181

1201

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

2182

1202

self.server.child_pipe.fileno())

2183

2184

session = gnutls.ClientSession(self.request)

2185

1203

1204

session = (gnutls.connection

1205

.ClientSession(self.request,

1206

gnutls.connection

1207

.X509Credentials()))

1208

1209

# Note: gnutls.connection.X509Credentials is really a

1210

# generic GnuTLS certificate credentials object so long as

1211

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

1212

# here despite using OpenPGP certificates.

1213

2186

1214

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

2187

1215

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

2188

1216

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

2191

1219

priority = self.server.gnutls_priority

2192

1220

if priority is None:

2193

1221

priority = "NORMAL"

2194

gnutls.priority_set_direct(session._c_object,

2195

priority.encode("utf-8"),

2196

None)

2197

1222

(gnutls.library.functions

1223

.gnutls_priority_set_direct(session._c_object,

1224

priority, None))

1225

2198

1226

# Start communication using the Mandos protocol

2199

1227

# Get protocol number

2200

1228

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

2201

1229

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

2202

1230

try:

2203

1231

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

2204

raise RuntimeError(line)

1232

raise RuntimeError

2205

1233

except (ValueError, IndexError, RuntimeError) as error:

2206

1234

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

2207

1235

return

2208

1236

2209

1237

# Start GnuTLS connection

2210

1238

try:

2211

1239

session.handshake()

2212

except gnutls.Error as error:

1240

except gnutls.errors.GNUTLSError as error:

2213

1241

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

2214

1242

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

2215

1243

# established. Just abandon the request.

2216

1244

return

2217

1245

logger.debug("Handshake succeeded")

2218

1246

2219

1247

approval_required = False

2220

1248

try:

2221

1249

try:

2222

fpr = self.fingerprint(

2223

self.peer_certificate(session))

2224

except (TypeError, gnutls.Error) as error:

1250

fpr = self.fingerprint(self.peer_certificate

1251

(session))

1252

except (TypeError,

1253

gnutls.errors.GNUTLSError) as error:

2225

1254

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

2226

1255

return

2227

1256

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

2228

1257

2229

1258

try:

2230

1259

client = ProxyClient(child_pipe, fpr,

2231

1260

self.client_address)

2240

1269

while True:

2241

1270

if not client.enabled:

2242

1271

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

2243

client.name)

1272

client.name)

2244

1273

if self.server.use_dbus:

2245

1274

# Emit D-Bus signal

2246

client.Rejected("Disabled")

1275

client.Rejected("Disabled")

2247

1276

return

2248

1277

2249

if client.approved or not client.approval_delay:

1278

if client._approved or not client.approval_delay:

2250

1279

#We are approved or approval is disabled

2251

1280

break

2252

elif client.approved is None:

1281

elif client._approved is None:

2253

1282

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

2254

1283

client.name)

2255

1284

if self.server.use_dbus:

2256

1285

# Emit D-Bus signal

2257

1286

client.NeedApproval(

2258

client.approval_delay.total_seconds()

2259

* 1000, client.approved_by_default)

1287

client.approval_delay_milliseconds(),

1288

client.approved_by_default)

2260

1289

else:

2261

1290

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

2262

1291

client.name)

2266

1295

return

2267

1296

2268

1297

#wait until timeout or approved

1298

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

2269

1299

time = datetime.datetime.now()

2270

1300

client.changedstate.acquire()

2271

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

1301

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

2272

1302

client.changedstate.release()

2273

1303

time2 = datetime.datetime.now()

2274

1304

if (time2 - time) >= delay:

2285

1315

else:

2286

1316

delay -= time2 - time

2287

1317

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

2294

1318

sent_size = 0

1319

while sent_size < len(client.secret):

1320

try:

1321

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

1322

except gnutls.errors.GNUTLSError as error:

1323

logger.warning("gnutls send failed")

1324

return

1325

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

1326

sent, len(client.secret)

1327

- (sent_size + sent))

1328

sent_size += sent

1329

2295

1330

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

2296

# bump the timeout using extended_timeout

2297

client.bump_timeout(client.extended_timeout)

1331

# bump the timeout as if seen

1332

client.checked_ok()

2298

1333

if self.server.use_dbus:

2299

1334

# Emit D-Bus signal

2300

1335

client.GotSecret()

2304

1339

client.approvals_pending -= 1

2305

1340

try:

2306

1341

session.bye()

2307

except gnutls.Error as error:

2308

logger.warning("GnuTLS bye failed",

2309

exc_info=error)

1342

except gnutls.errors.GNUTLSError as error:

1343

logger.warning("GnuTLS bye failed")

2310

1344

2311

1345

@staticmethod

2312

1346

def peer_certificate(session):

2313

1347

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

2314

1348

# If not an OpenPGP certificate...

2315

if (gnutls.certificate_type_get(session._c_object)

2316

!= gnutls.CRT_OPENPGP):

2317

# ...return invalid data

2318

return b""

1349

if (gnutls.library.functions

1350

.gnutls_certificate_type_get(session._c_object)

1351

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1352

# ...do the normal thing

1353

return session.peer_certificate

2319

1354

list_size = ctypes.c_uint(1)

2320

cert_list = (gnutls.certificate_get_peers

1355

cert_list = (gnutls.library.functions

1356

.gnutls_certificate_get_peers

2321

1357

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

2322

1358

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

2323

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

1359

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

1360

" certificate")

2324

1361

if list_size.value == 0:

2325

1362

return None

2326

1363

cert = cert_list[0]

2330

1367

def fingerprint(openpgp):

2331

1368

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2332

1369

# New GnuTLS "datum" with the OpenPGP public key

2333

datum = gnutls.datum_t(

2334

ctypes.cast(ctypes.c_char_p(openpgp),

2335

ctypes.POINTER(ctypes.c_ubyte)),

2336

ctypes.c_uint(len(openpgp)))

1370

datum = (gnutls.library.types

1371

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

1372

ctypes.POINTER

1373

(ctypes.c_ubyte)),

1374

ctypes.c_uint(len(openpgp))))

2337

1375

# New empty GnuTLS certificate

2338

crt = gnutls.openpgp_crt_t()

2339

gnutls.openpgp_crt_init(ctypes.byref(crt))

1376

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1377

(gnutls.library.functions

1378

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2340

1379

# Import the OpenPGP public key into the certificate

2341

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

2342

gnutls.OPENPGP_FMT_RAW)

1380

(gnutls.library.functions

1381

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

1382

gnutls.library.constants

1383

.GNUTLS_OPENPGP_FMT_RAW))

2343

1384

# Verify the self signature in the key

2344

1385

crtverify = ctypes.c_uint()

2345

gnutls.openpgp_crt_verify_self(crt, 0,

2346

ctypes.byref(crtverify))

1386

(gnutls.library.functions

1387

.gnutls_openpgp_crt_verify_self(crt, 0,

1388

ctypes.byref(crtverify)))

2347

1389

if crtverify.value != 0:

2348

gnutls.openpgp_crt_deinit(crt)

2349

raise gnutls.CertificateSecurityError("Verify failed")

1390

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1391

raise (gnutls.errors.CertificateSecurityError

1392

("Verify failed"))

2350

1393

# New buffer for the fingerprint

2351

1394

buf = ctypes.create_string_buffer(20)

2352

1395

buf_len = ctypes.c_size_t()

2353

1396

# Get the fingerprint from the certificate into the buffer

2354

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

2355

ctypes.byref(buf_len))

1397

(gnutls.library.functions

1398

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

1399

ctypes.byref(buf_len)))

2356

1400

# Deinit the certificate

2357

gnutls.openpgp_crt_deinit(crt)

1401

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2358

1402

# Convert the buffer to a Python bytestring

2359

1403

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

2360

1404

# Convert the bytestring to hexadecimal notation

2361

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

1405

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

2362

1406

return hex_fpr

2363

1407

2364

1408

2365

1409

class MultiprocessingMixIn(object):

2366

1410

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

2367

2368

1411

def sub_process_main(self, request, address):

2369

1412

try:

2370

1413

self.finish_request(request, address)

2371

except Exception:

1414

except:

2372

1415

self.handle_error(request, address)

2373

1416

self.close_request(request)

2374

1417

2375

1418

def process_request(self, request, address):

2376

1419

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

2377

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

2378

args = (request, address))

2379

proc.start()

2380

return proc

2381

1420

multiprocessing.Process(target = self.sub_process_main,

1421

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

2382

1422

2383

1423

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2384

1424

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

2385

2386

1425

def process_request(self, request, client_address):

2387

1426

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

2388

1427

2389

1428

This function creates a new pipe in self.pipe

2390

1429

"""

2391

1430

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2392

2393

proc = MultiprocessingMixIn.process_request(self, request,

2394

client_address)

1431

1432

super(MultiprocessingMixInWithPipe,

1433

self).process_request(request, client_address)

2395

1434

self.child_pipe.close()

2396

self.add_pipe(parent_pipe, proc)

2397

2398

def add_pipe(self, parent_pipe, proc):

1435

self.add_pipe(parent_pipe)

1436

1437

def add_pipe(self, parent_pipe):

2399

1438

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

2400

raise NotImplementedError()

2401

1439

raise NotImplementedError

2402

1440

2403

1441

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2404

1442

socketserver.TCPServer, object):

2409

1447

interface: None or a network interface name (string)

2410

1448

use_ipv6: Boolean; to use IPv6 or not

2411

1449

"""

2412

2413

1450

def __init__(self, server_address, RequestHandlerClass,

2414

interface=None,

2415

use_ipv6=True,

2416

socketfd=None):

2417

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

2418

creating a new one with socket.socket().

2419

"""

1451

interface=None, use_ipv6=True):

2420

1452

self.interface = interface

2421

1453

if use_ipv6:

2422

1454

self.address_family = socket.AF_INET6

2423

if socketfd is not None:

2424

# Save the file descriptor

2425

self.socketfd = socketfd

2426

# Save the original socket.socket() function

2427

self.socket_socket = socket.socket

2428

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

2429

#

2430

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

2431

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

2432

# patching socket.socket.)

2433

#

2434

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

2435

@functools.wraps(socket.socket)

2436

def socket_wrapper(*args, **kwargs):

2437

# Restore original function so subsequent calls are

2438

# not affected.

2439

socket.socket = self.socket_socket

2440

del self.socket_socket

2441

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

2442

# saved file descriptor.

2443

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

2444

# Replace socket.socket() function with wrapper

2445

socket.socket = socket_wrapper

2446

# The socketserver.TCPServer.__init__ will call

2447

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

2448

# socket_wrapper(), if socketfd was set.

2449

1455

socketserver.TCPServer.__init__(self, server_address,

2450

1456

RequestHandlerClass)

2451

2452

1457

def server_bind(self):

2453

1458

"""This overrides the normal server_bind() function

2454

1459

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

2455

1460

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

2456

global SO_BINDTODEVICE

2457

1461

if self.interface is not None:

2458

1462

if SO_BINDTODEVICE is None:

2459

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

2460

# common enough.

2461

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

2462

SO_BINDTODEVICE = 25

2463

try:

2464

self.socket.setsockopt(

2465

socket.SOL_SOCKET, SO_BINDTODEVICE,

2466

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

2467

except socket.error as error:

2468

if error.errno == errno.EPERM:

2469

logger.error("No permission to bind to"

2470

" interface %s", self.interface)

2471

elif error.errno == errno.ENOPROTOOPT:

2472

logger.error("SO_BINDTODEVICE not available;"

2473

" cannot bind to interface %s",

2474

self.interface)

2475

elif error.errno == errno.ENODEV:

2476

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

2477

" cannot bind", self.interface)

2478

else:

2479

raise

1463

logger.error("SO_BINDTODEVICE does not exist;"

1464

" cannot bind to interface %s",

1465

self.interface)

1466

else:

1467

try:

1468

self.socket.setsockopt(socket.SOL_SOCKET,

1469

SO_BINDTODEVICE,

1470

str(self.interface

1471

+ '\0'))

1472

except socket.error as error:

1473

if error[0] == errno.EPERM:

1474

logger.error("No permission to"

1475

" bind to interface %s",

1476

self.interface)

1477

elif error[0] == errno.ENOPROTOOPT:

1478

logger.error("SO_BINDTODEVICE not available;"

1479

" cannot bind to interface %s",

1480

self.interface)

1481

else:

1482

raise

2480

1483

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

2481

1484

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

2482

1485

if not self.server_address[0]:

2483

1486

if self.address_family == socket.AF_INET6:

2484

1487

any_address = "::" # in6addr_any

2485

1488

else:

2486

any_address = "0.0.0.0" # INADDR_ANY

1489

any_address = socket.INADDR_ANY

2487

1490

self.server_address = (any_address,

2488

1491

self.server_address[1])

2489

1492

elif not self.server_address[1]:

2490

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

1493

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

1494

0)

2491

1495

# if self.interface:

2492

1496

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

2493

1497

# 0, # port

2505

1509

gnutls_priority GnuTLS priority string

2506

1510

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

2507

1511

2508

Assumes a GLib.MainLoop event loop.

1512

Assumes a gobject.MainLoop event loop.

2509

1513

"""

2510

2511

1514

def __init__(self, server_address, RequestHandlerClass,

2512

interface=None,

2513

use_ipv6=True,

2514

clients=None,

2515

gnutls_priority=None,

2516

use_dbus=True,

2517

socketfd=None):

1515

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

1516

gnutls_priority=None, use_dbus=True):

2518

1517

self.enabled = False

2519

1518

self.clients = clients

2520

1519

if self.clients is None:

2521

self.clients = {}

1520

self.clients = set()

2522

1521

self.use_dbus = use_dbus

2523

1522

self.gnutls_priority = gnutls_priority

2524

1523

IPv6_TCPServer.__init__(self, server_address,

2525

1524

RequestHandlerClass,

2526

1525

interface = interface,

2527

use_ipv6 = use_ipv6,

2528

socketfd = socketfd)

2529

1526

use_ipv6 = use_ipv6)

2530

1527

def server_activate(self):

2531

1528

if self.enabled:

2532

1529

return socketserver.TCPServer.server_activate(self)

2533

2534

1530

def enable(self):

2535

1531

self.enabled = True

2536

2537

def add_pipe(self, parent_pipe, proc):

1532

def add_pipe(self, parent_pipe):

2538

1533

# Call "handle_ipc" for both data and EOF events

2539

GLib.io_add_watch(

2540

parent_pipe.fileno(),

2541

GLib.IO_IN | GLib.IO_HUP,

2542

functools.partial(self.handle_ipc,

2543

parent_pipe = parent_pipe,

2544

proc = proc))

2545

2546

def handle_ipc(self, source, condition,

2547

parent_pipe=None,

2548

proc = None,

1534

gobject.io_add_watch(parent_pipe.fileno(),

1535

gobject.IO_IN | gobject.IO_HUP,

1536

functools.partial(self.handle_ipc,

1537

parent_pipe = parent_pipe))

1538

1539

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

2549

1540

client_object=None):

2550

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

2551

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

2552

# Wait for other process to exit

2553

proc.join()

1541

condition_names = {

1542

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

1543

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

1544

# blocking).

1545

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

1546

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

1547

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

1548

# broken, usually for pipes and

1549

# sockets).

1550

}

1551

conditions_string = ' | '.join(name

1552

for cond, name in

1553

condition_names.iteritems()

1554

if cond & condition)

1555

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

1556

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

2554

1557

return False

2555

1558

2556

1559

# Read a request from the child

2561

1564

fpr = request[1]

2562

1565

address = request[2]

2563

1566

2564

for c in self.clients.values():

1567

for c in self.clients:

2565

1568

if c.fingerprint == fpr:

2566

1569

client = c

2567

1570

break

2570

1573

"dress: %s", fpr, address)

2571

1574

if self.use_dbus:

2572

1575

# Emit D-Bus signal

2573

mandos_dbus_service.ClientNotFound(fpr,

2574

address[0])

1576

mandos_dbus_service.ClientNotFound(fpr, address[0])

2575

1577

parent_pipe.send(False)

2576

1578

return False

2577

1579

2578

GLib.io_add_watch(

2579

parent_pipe.fileno(),

2580

GLib.IO_IN | GLib.IO_HUP,

2581

functools.partial(self.handle_ipc,

2582

parent_pipe = parent_pipe,

2583

proc = proc,

2584

client_object = client))

1580

gobject.io_add_watch(parent_pipe.fileno(),

1581

gobject.IO_IN | gobject.IO_HUP,

1582

functools.partial(self.handle_ipc,

1583

parent_pipe = parent_pipe,

1584

client_object = client))

2585

1585

parent_pipe.send(True)

2586

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

2587

# same fileno

1586

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

2588

1587

return False

2589

1588

if command == 'funcall':

2590

1589

funcname = request[1]

2591

1590

args = request[2]

2592

1591

kwargs = request[3]

2593

1592

2594

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

2595

funcname)(*args,

2596

**kwargs)))

2597

1593

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

1594

2598

1595

if command == 'getattr':

2599

1596

attrname = request[1]

2600

if isinstance(client_object.__getattribute__(attrname),

2601

collections.Callable):

2602

parent_pipe.send(('function', ))

1597

if callable(client_object.__getattribute__(attrname)):

1598

parent_pipe.send(('function',))

2603

1599

else:

2604

parent_pipe.send((

2605

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

1600

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

2606

1601

2607

1602

if command == 'setattr':

2608

1603

attrname = request[1]

2609

1604

value = request[2]

2610

1605

setattr(client_object, attrname, value)

2611

1606

2612

1607

return True

2613

1608

2614

1609

2615

def rfc3339_duration_to_delta(duration):

2616

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

2617

2618

>>> rfc3339_duration_to_delta("P7D")

2619

datetime.timedelta(7)

2620

>>> rfc3339_duration_to_delta("PT60S")

2621

datetime.timedelta(0, 60)

2622

>>> rfc3339_duration_to_delta("PT60M")

2623

datetime.timedelta(0, 3600)

2624

>>> rfc3339_duration_to_delta("PT24H")

2625

datetime.timedelta(1)

2626

>>> rfc3339_duration_to_delta("P1W")

2627

datetime.timedelta(7)

2628

>>> rfc3339_duration_to_delta("PT5M30S")

2629

datetime.timedelta(0, 330)

2630

>>> rfc3339_duration_to_delta("P1DT3M20S")

2631

datetime.timedelta(1, 200)

2632

"""

2633

2634

# Parsing an RFC 3339 duration with regular expressions is not

2635

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

2636

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

2637

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

2638

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

2639

# avoid excessive use of external libraries.

2640

2641

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

2642

Token = collections.namedtuple("Token", (

2643

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

2644

# a "group" containing digits

2645

"value", # datetime.timedelta or None

2646

"followers")) # Tokens valid after this token

2647

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

2648

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

2649

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

2650

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

2651

datetime.timedelta(seconds=1),

2652

frozenset((token_end, )))

2653

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

2654

datetime.timedelta(minutes=1),

2655

frozenset((token_second, token_end)))

2656

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

2657

datetime.timedelta(hours=1),

2658

frozenset((token_minute, token_end)))

2659

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

2660

None,

2661

frozenset((token_hour, token_minute,

2662

token_second)))

2663

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

2664

datetime.timedelta(days=1),

2665

frozenset((token_time, token_end)))

2666

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

2667

datetime.timedelta(weeks=4),

2668

frozenset((token_day, token_end)))

2669

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

2670

datetime.timedelta(weeks=52),

2671

frozenset((token_month, token_end)))

2672

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

2673

datetime.timedelta(weeks=1),

2674

frozenset((token_end, )))

2675

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

2676

frozenset((token_year, token_month,

2677

token_day, token_time,

2678

token_week)))

2679

# Define starting values

2680

value = datetime.timedelta() # Value so far

2681

found_token = None

2682

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

2683

s = duration # String left to parse

2684

# Loop until end token is found

2685

while found_token is not token_end:

2686

# Search for any currently valid tokens

2687

for token in followers:

2688

match = token.regexp.match(s)

2689

if match is not None:

2690

# Token found

2691

if token.value is not None:

2692

# Value found, parse digits

2693

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

2694

# Add to value so far

2695

value += factor * token.value

2696

# Strip token from string

2697

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

2698

# Go to found token

2699

found_token = token

2700

# Set valid next tokens

2701

followers = found_token.followers

2702

break

2703

else:

2704

# No currently valid tokens were found

2705

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

2706

.format(duration))

2707

# End token found

2708

return value

2709

2710

2711

1610

def string_to_delta(interval):

2712

1611

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

2713

1612

2724

1623

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

2725

1624

datetime.timedelta(0, 330)

2726

1625

"""

2727

2728

try:

2729

return rfc3339_duration_to_delta(interval)

2730

except ValueError:

2731

pass

2732

2733

1626

timevalue = datetime.timedelta(0)

2734

1627

for s in interval.split():

2735

1628

try:

2736

suffix = s[-1]

1629

suffix = unicode(s[-1])

2737

1630

value = int(s[:-1])

2738

1631

if suffix == "d":

2739

1632

delta = datetime.timedelta(value)

2746

1639

elif suffix == "w":

2747

1640

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

2748

1641

else:

2749

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

2750

except IndexError as e:

1642

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

1643

except (ValueError, IndexError) as e:

2751

1644

raise ValueError(*(e.args))

2752

1645

timevalue += delta

2753

1646

return timevalue

2754

1647

2755

1648

1649

def if_nametoindex(interface):

1650

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

1651

1652

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

1653

global if_nametoindex

1654

try:

1655

if_nametoindex = (ctypes.cdll.LoadLibrary

1656

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

1657

.if_nametoindex)

1658

except (OSError, AttributeError):

1659

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

1660

def if_nametoindex(interface):

1661

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

1662

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

1663

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

1664

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1665

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

1666

interface))

1667

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

1668

ifreq[16:20])[0]

1669

return interface_index

1670

return if_nametoindex(interface)

1671

1672

2756

1673

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

2757

1674

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

2758

1675

2766

1683

sys.exit()

2767

1684

if not noclose:

2768

1685

# Close all standard open file descriptors

2769

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

1686

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

2770

1687

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

2771

1688

raise OSError(errno.ENODEV,

2772

"{} not a character device"

2773

.format(os.devnull))

1689

"%s not a character device"

1690

% os.path.devnull)

2774

1691

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

2775

1692

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

2776

1693

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

2785

1702

2786

1703

parser = argparse.ArgumentParser()

2787

1704

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

2788

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

1705

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

2789

1706

help="show version number and exit")

2790

1707

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

2791

1708

help="Bind to interface IF")

2797

1714

help="Run self-test")

2798

1715

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

2799

1716

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

2800

" to terminal", default=None)

1717

" to terminal")

2801

1718

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

2802

1719

help="Debug level for stdout output")

2803

1720

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

2810

1727

" files")

2811

1728

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

2812

1729

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

2813

" system bus interface", default=None)

1730

" system bus interface")

2814

1731

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

2815

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

2816

default=None)

2817

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

2818

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

2819

" state", default=None)

2820

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

2821

help="Specify a file descriptor to a network"

2822

" socket to use instead of creating one")

2823

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

2824

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

2825

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

2826

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

2827

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

2828

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

2829

default=None)

2830

1732

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

2831

1733

options = parser.parse_args()

2832

1734

2833

1735

if options.check:

2834

1736

import doctest

2835

fail_count, test_count = doctest.testmod()

2836

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

1737

doctest.testmod()

1738

sys.exit()

2837

1739

2838

1740

# Default values for config file for server-global settings

2839

1741

server_defaults = { "interface": "",

2841

1743

"port": "",

2842

1744

"debug": "False",

2843

1745

"priority":

2844

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

2845

":+SIGN-DSA-SHA256",

1746

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

2846

1747

"servicename": "Mandos",

2847

1748

"use_dbus": "True",

2848

1749

"use_ipv6": "True",

2849

1750

"debuglevel": "",

2850

"restore": "True",

2851

"socket": "",

2852

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

2853

"foreground": "False",

2854

"zeroconf": "True",

2855

}

1751

}

2856

1752

2857

1753

# Parse config file for server-global settings

2858

1754

server_config = configparser.SafeConfigParser(server_defaults)

2859

1755

del server_defaults

2860

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

1756

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

1757

"mandos.conf"))

2861

1758

# Convert the SafeConfigParser object to a dict

2862

1759

server_settings = server_config.defaults()

2863

1760

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

2864

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

1761

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

2865

1762

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

2866

1763

option)

2867

1764

if server_settings["port"]:

2868

1765

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

2869

1766

"port")

2870

if server_settings["socket"]:

2871

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

2872

"socket")

2873

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

2874

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

2875

# happen with a supplied network socket.

2876

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

2877

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

2878

["socket"])

2879

1767

del server_config

2880

1768

2881

1769

# Override the settings from the config file with command line

2882

1770

# options, if set.

2883

1771

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

2884

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

2885

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

2886

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

1772

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

1773

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

2887

1774

value = getattr(options, option)

2888

1775

if value is not None:

2889

1776

server_settings[option] = value

2890

1777

del options

2891

1778

# Force all strings to be unicode

2892

1779

for option in server_settings.keys():

2893

if isinstance(server_settings[option], bytes):

2894

server_settings[option] = (server_settings[option]

2895

.decode("utf-8"))

2896

# Force all boolean options to be boolean

2897

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

2898

"foreground", "zeroconf"):

2899

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

2900

# Debug implies foreground

2901

if server_settings["debug"]:

2902

server_settings["foreground"] = True

1780

if type(server_settings[option]) is str:

1781

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

2903

1782

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

2904

1783

2905

1784

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

2906

1785

2907

if (not server_settings["zeroconf"]

2908

and not (server_settings["port"]

2909

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

2910

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

2911

2912

1786

# For convenience

2913

1787

debug = server_settings["debug"]

2914

1788

debuglevel = server_settings["debuglevel"]

2915

1789

use_dbus = server_settings["use_dbus"]

2916

1790

use_ipv6 = server_settings["use_ipv6"]

2917

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

2918

stored_state_file)

2919

foreground = server_settings["foreground"]

2920

zeroconf = server_settings["zeroconf"]

2921

2922

if debug:

2923

initlogger(debug, logging.DEBUG)

2924

else:

2925

if not debuglevel:

2926

initlogger(debug)

2927

else:

2928

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

2929

initlogger(debug, level)

2930

1791

2931

1792

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

2932

syslogger.setFormatter(

2933

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

2934

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

2935

server_settings["servicename"])))

1793

syslogger.setFormatter(logging.Formatter

1794

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

1795

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

1796

% server_settings["servicename"]))

2936

1797

2937

1798

# Parse config file with clients

2938

client_config = configparser.SafeConfigParser(Client

2939

.client_defaults)

1799

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

1800

"interval": "5m",

1801

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

1802

"host": "",

1803

"approval_delay": "0s",

1804

"approval_duration": "1s",

1805

}

1806

client_config = configparser.SafeConfigParser(client_defaults)

2940

1807

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

2941

1808

"clients.conf"))

2942

1809

2943

1810

global mandos_dbus_service

2944

1811

mandos_dbus_service = None

2945

1812

2946

socketfd = None

2947

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

2948

socketfd = server_settings["socket"]

2949

tcp_server = MandosServer(

2950

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

2951

ClientHandler,

2952

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

2953

use_ipv6=use_ipv6,

2954

gnutls_priority=server_settings["priority"],

2955

use_dbus=use_dbus,

2956

socketfd=socketfd)

2957

if not foreground:

2958

pidfilename = "/run/mandos.pid"

2959

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

2960

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

2961

pidfile = None

1813

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

1814

server_settings["port"]),

1815

ClientHandler,

1816

interface=(server_settings["interface"]

1817

or None),

1818

use_ipv6=use_ipv6,

1819

gnutls_priority=

1820

server_settings["priority"],

1821

use_dbus=use_dbus)

1822

if not debug:

1823

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

2962

1824

try:

2963

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

2964

except IOError as e:

2965

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

2966

exc_info=e)

1825

pidfile = open(pidfilename, "w")

1826

except IOError:

1827

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

2967

1828

2968

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

2969

("mandos", "mandos"),

2970

("nobody", "nogroup")):

1829

try:

1830

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

1831

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

1832

except KeyError:

2971

1833

try:

2972

uid = pwd.getpwnam(name).pw_uid

2973

gid = pwd.getpwnam(group).pw_gid

2974

break

1834

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

1835

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

2975

1836

except KeyError:

2976

continue

2977

else:

2978

uid = 65534

2979

gid = 65534

1837

try:

1838

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

1839

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

1840

except KeyError:

1841

uid = 65534

1842

gid = 65534

2980

1843

try:

2981

1844

os.setgid(gid)

2982

1845

os.setuid(uid)

2983

if debug:

2984

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

2985

gid))

2986

1846

except OSError as error:

2987

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

2988

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

2989

if error.errno != errno.EPERM:

2990

raise

1847

if error[0] != errno.EPERM:

1848

raise error

2991

1849

1850

if not debug and not debuglevel:

1851

syslogger.setLevel(logging.WARNING)

1852

console.setLevel(logging.WARNING)

1853

if debuglevel:

1854

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

1855

syslogger.setLevel(level)

1856

console.setLevel(level)

1857

2992

1858

if debug:

2993

1859

# Enable all possible GnuTLS debugging

2994

1860

2995

1861

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

2996

1862

# - GnuTLS manual

2997

gnutls.global_set_log_level(11)

1863

gnutls.library.functions.gnutls_global_set_log_level(11)

2998

1864

2999

@gnutls.log_func

1865

@gnutls.library.types.gnutls_log_func

3000

1866

def debug_gnutls(level, string):

3001

1867

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

3002

1868

3003

gnutls.global_set_log_function(debug_gnutls)

1869

(gnutls.library.functions

1870

.gnutls_global_set_log_function(debug_gnutls))

3004

1871

3005

1872

# Redirect stdin so all checkers get /dev/null

3006

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

1873

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

3007

1874

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

3008

1875

if null > 2:

3009

1876

os.close(null)

1877

else:

1878

# No console logging

1879

logger.removeHandler(console)

3010

1880

3011

1881

# Need to fork before connecting to D-Bus

3012

if not foreground:

1882

if not debug:

3013

1883

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

3014

1884

daemon()

3015

1885

3016

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

3017

# to inform GLib that threads will be used.

3018

GLib.threads_init()

3019

3020

1886

global main_loop

3021

1887

# From the Avahi example code

3022

DBusGMainLoop(set_as_default=True)

3023

main_loop = GLib.MainLoop()

1888

DBusGMainLoop(set_as_default=True )

1889

main_loop = gobject.MainLoop()

3024

1890

bus = dbus.SystemBus()

3025

1891

# End of Avahi example code

3026

1892

if use_dbus:

3027

1893

try:

3028

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

3029

bus,

3030

do_not_queue=True)

3031

old_bus_name = dbus.service.BusName(

3032

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

3033

do_not_queue=True)

3034

except dbus.exceptions.DBusException as e:

3035

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

1894

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

1895

bus, do_not_queue=True)

1896

except dbus.exceptions.NameExistsException as e:

1897

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

3036

1898

use_dbus = False

3037

1899

server_settings["use_dbus"] = False

3038

1900

tcp_server.use_dbus = False

3039

if zeroconf:

3040

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3041

service = AvahiServiceToSyslog(

3042

name = server_settings["servicename"],

3043

servicetype = "_mandos._tcp",

3044

protocol = protocol,

3045

bus = bus)

3046

if server_settings["interface"]:

3047

service.interface = if_nametoindex(

3048

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

1901

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1902

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

1903

servicetype = "_mandos._tcp",

1904

protocol = protocol, bus = bus)

1905

if server_settings["interface"]:

1906

service.interface = (if_nametoindex

1907

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

3049

1908

3050

1909

global multiprocessing_manager

3051

1910

multiprocessing_manager = multiprocessing.Manager()

3053

1912

client_class = Client

3054

1913

if use_dbus:

3055

1914

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

3056

3057

client_settings = Client.config_parser(client_config)

3058

old_client_settings = {}

3059

clients_data = {}

3060

3061

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

3062

global wnull

3063

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

3064

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

3065

# mode

3066

if debug or not foreground:

3067

wnull.close()

3068

3069

# Get client data and settings from last running state.

3070

if server_settings["restore"]:

3071

try:

3072

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

3073

if sys.version_info.major == 2:

3074

clients_data, old_client_settings = pickle.load(

3075

stored_state)

3076

else:

3077

bytes_clients_data, bytes_old_client_settings = (

3078

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

3079

### Fix bytes to strings

3080

## clients_data

3081

# .keys()

3082

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

3083

if isinstance(key, bytes)

3084

else key): value

3085

for key, value in

3086

bytes_clients_data.items() }

3087

del bytes_clients_data

3088

for key in clients_data:

3089

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

3090

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

3091

for k, v in

3092

clients_data[key].items() }

3093

clients_data[key] = value

3094

# .client_structure

3095

value["client_structure"] = [

3096

(s.decode("utf-8")

3097

if isinstance(s, bytes)

3098

else s) for s in

3099

value["client_structure"] ]

3100

# .name & .host

3101

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

3102

if isinstance(value[k], bytes):

3103

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

3104

## old_client_settings

3105

# .keys()

3106

old_client_settings = {

3107

(key.decode("utf-8")

3108

if isinstance(key, bytes)

3109

else key): value

3110

for key, value in

3111

bytes_old_client_settings.items() }

3112

del bytes_old_client_settings

3113

# .host

3114

for value in old_client_settings.values():

3115

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

3116

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

3117

.decode("utf-8"))

3118

os.remove(stored_state_path)

3119

except IOError as e:

3120

if e.errno == errno.ENOENT:

3121

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

3122

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

3123

else:

3124

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

3125

exc_info=e)

3126

raise

3127

except EOFError as e:

3128

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

3129

"EOFError:",

3130

exc_info=e)

3131

3132

with PGPEngine() as pgp:

3133

for client_name, client in clients_data.items():

3134

# Skip removed clients

3135

if client_name not in client_settings:

3136

continue

3137

3138

# Decide which value to use after restoring saved state.

3139

# We have three different values: Old config file,

3140

# new config file, and saved state.

3141

# New config value takes precedence if it differs from old

3142

# config value, otherwise use saved state.

3143

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

3144

try:

3145

# For each value in new config, check if it

3146

# differs from the old config value (Except for

3147

# the "secret" attribute)

3148

if (name != "secret"

3149

and (value !=

3150

old_client_settings[client_name][name])):

3151

client[name] = value

3152

except KeyError:

3153

pass

3154

3155

# Clients who has passed its expire date can still be

3156

# enabled if its last checker was successful. A Client

3157

# whose checker succeeded before we stored its state is

3158

# assumed to have successfully run all checkers during

3159

# downtime.

3160

if client["enabled"]:

3161

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

3162

if not client["last_checked_ok"]:

3163

logger.warning(

3164

"disabling client {} - Client never "

3165

"performed a successful checker".format(

3166

client_name))

3167

client["enabled"] = False

3168

elif client["last_checker_status"] != 0:

3169

logger.warning(

3170

"disabling client {} - Client last"

3171

" checker failed with error code"

3172

" {}".format(

3173

client_name,

3174

client["last_checker_status"]))

3175

client["enabled"] = False

3176

else:

3177

client["expires"] = (

3178

datetime.datetime.utcnow()

3179

+ client["timeout"])

3180

logger.debug("Last checker succeeded,"

3181

" keeping {} enabled".format(

3182

client_name))

1915

def client_config_items(config, section):

1916

special_settings = {

1917

"approved_by_default":

1918

lambda: config.getboolean(section,

1919

"approved_by_default"),

1920

}

1921

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

3183

1922

try:

3184

client["secret"] = pgp.decrypt(

3185

client["encrypted_secret"],

3186

client_settings[client_name]["secret"])

3187

except PGPError:

3188

# If decryption fails, we use secret from new settings

3189

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

3190

client_name))

3191

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

3192

["secret"])

3193

3194

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

3195

for client_name in (set(old_client_settings)

3196

- set(client_settings)):

3197

del clients_data[client_name]

3198

for client_name in (set(client_settings)

3199

- set(old_client_settings)):

3200

clients_data[client_name] = client_settings[client_name]

3201

3202

# Create all client objects

3203

for client_name, client in clients_data.items():

3204

tcp_server.clients[client_name] = client_class(

3205

name = client_name,

3206

settings = client,

3207

server_settings = server_settings)

3208

1923

yield (name, special_settings[name]())

1924

except KeyError:

1925

yield (name, value)

1926

1927

tcp_server.clients.update(set(

1928

client_class(name = section,

1929

config= dict(client_config_items(

1930

client_config, section)))

1931

for section in client_config.sections()))

3209

1932

if not tcp_server.clients:

3210

1933

logger.warning("No clients defined")

3211

3212

if not foreground:

3213

if pidfile is not None:

3214

pid = os.getpid()

3215

try:

3216

with pidfile:

3217

print(pid, file=pidfile)

3218

except IOError:

3219

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

3220

pidfilename, pid)

3221

del pidfile

1934

1935

if not debug:

1936

try:

1937

with pidfile:

1938

pid = os.getpid()

1939

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

1940

del pidfile

1941

except IOError:

1942

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

1943

pidfilename, pid)

1944

except NameError:

1945

# "pidfile" was never created

1946

pass

3222

1947

del pidfilename

3223

3224

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

3225

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3226

lambda: main_loop.quit() and False)

1948

1949

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

1950

1951

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

1952

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

3227

1953

3228

1954

if use_dbus:

3229

3230

@alternate_dbus_interfaces(

3231

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

3232

class MandosDBusService(DBusObjectWithObjectManager):

1955

class MandosDBusService(dbus.service.Object):

3233

1956

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

3234

3235

1957

def __init__(self):

3236

1958

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

3237

3238

_interface = "se.recompile.Mandos"

1959

_interface = "se.bsnet.fukt.Mandos"

3239

1960

3240

1961

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

3241

1962

def ClientAdded(self, objpath):

3247

1968

"D-Bus signal"

3248

1969

pass

3249

1970

3250

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

3251

"true"})

3252

1971

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

3253

1972

def ClientRemoved(self, objpath, name):

3254

1973

"D-Bus signal"

3255

1974

pass

3256

1975

3257

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

3258

"true"})

3259

1976

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

3260

1977

def GetAllClients(self):

3261

1978

"D-Bus method"

3262

return dbus.Array(c.dbus_object_path for c in

3263

tcp_server.clients.values())

1979

return dbus.Array(c.dbus_object_path

1980

for c in tcp_server.clients)

3264

1981

3265

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

3266

"true"})

3267

1982

@dbus.service.method(_interface,

3268

1983

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

3269

1984

def GetAllClientsWithProperties(self):

3270

1985

"D-Bus method"

3271

1986

return dbus.Dictionary(

3272

{ c.dbus_object_path: c.GetAll(

3273

"se.recompile.Mandos.Client")

3274

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

1987

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

1988

for c in tcp_server.clients),

3275

1989

signature="oa{sv}")

3276

1990

3277

1991

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

3278

1992

def RemoveClient(self, object_path):

3279

1993

"D-Bus method"

3280

for c in tcp_server.clients.values():

1994

for c in tcp_server.clients:

3281

1995

if c.dbus_object_path == object_path:

3282

del tcp_server.clients[c.name]

1996

tcp_server.clients.remove(c)

3283

1997

c.remove_from_connection()

3284

# Don't signal the disabling

1998

# Don't signal anything except ClientRemoved

3285

1999

c.disable(quiet=True)

3286

# Emit D-Bus signal for removal

3287

self.client_removed_signal(c)

2000

# Emit D-Bus signal

2001

self.ClientRemoved(object_path, c.name)

3288

2002

return

3289

2003

raise KeyError(object_path)

3290

2004

3291

2005

del _interface

3292

3293

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3294

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

3295

def GetManagedObjects(self):

3296

"""D-Bus method"""

3297

return dbus.Dictionary(

3298

{ client.dbus_object_path:

3299

dbus.Dictionary(

3300

{ interface: client.GetAll(interface)

3301

for interface in

3302

client._get_all_interface_names()})

3303

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

3304

3305

def client_added_signal(self, client):

3306

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

3307

if use_dbus:

3308

# New standard signal

3309

self.InterfacesAdded(

3310

client.dbus_object_path,

3311

dbus.Dictionary(

3312

{ interface: client.GetAll(interface)

3313

for interface in

3314

client._get_all_interface_names()}))

3315

# Old signal

3316

self.ClientAdded(client.dbus_object_path)

3317

3318

def client_removed_signal(self, client):

3319

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

3320

if use_dbus:

3321

# New standard signal

3322

self.InterfacesRemoved(

3323

client.dbus_object_path,

3324

client._get_all_interface_names())

3325

# Old signal

3326

self.ClientRemoved(client.dbus_object_path,

3327

client.name)

3328

2006

3329

2007

mandos_dbus_service = MandosDBusService()

3330

2008

3331

# Save modules to variables to exempt the modules from being

3332

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

3333

mp = multiprocessing

3334

wn = wnull

3335

2009

def cleanup():

3336

2010

"Cleanup function; run on exit"

3337

if zeroconf:

3338

service.cleanup()

3339

3340

mp.active_children()

3341

wn.close()

3342

if not (tcp_server.clients or client_settings):

3343

return

3344

3345

# Store client before exiting. Secrets are encrypted with key

3346

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

3347

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

3348

clients = {}

3349

with PGPEngine() as pgp:

3350

for client in tcp_server.clients.values():

3351

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

3352

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

3353

key)

3354

client_dict = {}

3355

3356

# A list of attributes that can not be pickled

3357

# + secret.

3358

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

3359

"checker", "server_settings" }

3360

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

3361

.Object):

3362

exclude.add(name)

3363

3364

client_dict["encrypted_secret"] = (client

3365

.encrypted_secret)

3366

for attr in client.client_structure:

3367

if attr not in exclude:

3368

client_dict[attr] = getattr(client, attr)

3369

3370

clients[client.name] = client_dict

3371

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

3372

3373

try:

3374

with tempfile.NamedTemporaryFile(

3375

mode='wb',

3376

suffix=".pickle",

3377

prefix='clients-',

3378

dir=os.path.dirname(stored_state_path),

3379

delete=False) as stored_state:

3380

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

3381

protocol = 2)

3382

tempname = stored_state.name

3383

os.rename(tempname, stored_state_path)

3384

except (IOError, OSError) as e:

3385

if not debug:

3386

try:

3387

os.remove(tempname)

3388

except NameError:

3389

pass

3390

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

3391

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

3392

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

3393

else:

3394

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

3395

exc_info=e)

3396

raise

3397

3398

# Delete all clients, and settings from config

2011

service.cleanup()

2012

3399

2013

while tcp_server.clients:

3400

name, client = tcp_server.clients.popitem()

2014

client = tcp_server.clients.pop()

3401

2015

if use_dbus:

3402

2016

client.remove_from_connection()

3403

# Don't signal the disabling

2017

client.disable_hook = None

2018

# Don't signal anything except ClientRemoved

3404

2019

client.disable(quiet=True)

3405

# Emit D-Bus signal for removal

3406

2020

if use_dbus:

3407

mandos_dbus_service.client_removed_signal(client)

3408

client_settings.clear()

2021

# Emit D-Bus signal

2022

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2023

client.name)

3409

2024

3410

2025

atexit.register(cleanup)

3411

2026

3412

for client in tcp_server.clients.values():

2027

for client in tcp_server.clients:

3413

2028

if use_dbus:

3414

# Emit D-Bus signal for adding

3415

mandos_dbus_service.client_added_signal(client)

3416

# Need to initiate checking of clients

3417

if client.enabled:

3418

client.init_checker()

2029

# Emit D-Bus signal

2030

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2031

client.enable()

3419

2032

3420

2033

tcp_server.enable()

3421

2034

tcp_server.server_activate()

3422

2035

3423

2036

# Find out what port we got

3424

if zeroconf:

3425

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

2037

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

3426

2038

if use_ipv6:

3427

2039

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

3428

" flowinfo %d, scope_id %d",

3429

*tcp_server.socket.getsockname())

2040

" flowinfo %d, scope_id %d"

2041

% tcp_server.socket.getsockname())

3430

2042

else: # IPv4

3431

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

3432

*tcp_server.socket.getsockname())

2043

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

2044

% tcp_server.socket.getsockname())

3433

2045

3434

2046

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

3435

2047

3436

2048

try:

3437

if zeroconf:

3438

# From the Avahi example code

3439

try:

3440

service.activate()

3441

except dbus.exceptions.DBusException as error:

3442

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

3443

cleanup()

3444

sys.exit(1)

3445

# End of Avahi example code

2049

# From the Avahi example code

2050

try:

2051

service.activate()

2052

except dbus.exceptions.DBusException as error:

2053

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

2054

cleanup()

2055

sys.exit(1)

2056

# End of Avahi example code

3446

2057

3447

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

3448

lambda *args, **kwargs:

3449

(tcp_server.handle_request

3450

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

2058

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

2059

lambda *args, **kwargs:

2060

(tcp_server.handle_request

2061

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

3451

2062

3452

2063

logger.debug("Starting main loop")

3453

2064

main_loop.run()

3454

2065

except AvahiError as error:

3455

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

2066

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

3456

2067

cleanup()

3457

2068

sys.exit(1)

3458

2069

except KeyboardInterrupt:

3463

2074

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

3464

2075

cleanup()

3465

2076

3466

3467

2077

if __name__ == '__main__':

3468

2078

main()