/mandos/trunk : revision 482

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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 = "1.3.0"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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102

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class AvahiError(Exception):

301

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

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self.value = value

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

304

**kwargs)

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

107

def __unicode__(self):

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return unicode(repr(self.value))

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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

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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

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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

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('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"""

179

if self.group is not None:

180

try:

181

self.group.Free()

182

except (dbus.exceptions.UnknownMethodException,

183

dbus.exceptions.DBusException) as e:

184

pass

185

self.group = None

390

186

if self.entry_group_state_changed_match is not None:

391

187

self.entry_group_state_changed_match.remove()

392

188

self.entry_group_state_changed_match = None

393

if self.group is not None:

394

self.group.Reset()

395

396

189

def add(self):

397

190

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

398

191

self.remove()

399

if self.group is None:

400

self.group = dbus.Interface(

401

self.bus.get_object(avahi.DBUS_NAME,

402

self.server.EntryGroupNew()),

403

avahi.DBUS_INTERFACE_ENTRY_GROUP)

192

self.group = dbus.Interface(

193

self.bus.get_object(avahi.DBUS_NAME,

194

self.server.EntryGroupNew(),

195

follow_name_owner_changes=True),

196

avahi.DBUS_INTERFACE_ENTRY_GROUP)

404

197

self.entry_group_state_changed_match = (

405

198

self.group.connect_to_signal(

406

'StateChanged', self.entry_group_state_changed))

199

'StateChanged', self .entry_group_state_changed))

407

200

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

408

201

self.name, self.type)

409

202

self.group.AddService(

415

208

dbus.UInt16(self.port),

416

209

avahi.string_array_to_txt_array(self.TXT))

417

210

self.group.Commit()

418

419

211

def entry_group_state_changed(self, state, error):

420

212

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

421

213

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

427

219

self.rename()

428

220

elif state == avahi.ENTRY_GROUP_FAILURE:

429

221

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

430

str(error))

431

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

432

222

unicode(error))

223

raise AvahiGroupError("State changed: %s"

224

% unicode(error))

433

225

def cleanup(self):

434

226

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

435

if self.group is not None:

436

try:

437

self.group.Free()

438

except (dbus.exceptions.UnknownMethodException,

439

dbus.exceptions.DBusException):

440

pass

441

self.group = None

442

227

self.remove()

443

444

228

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

445

229

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

446

230

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

}

231

bad_states = { avahi.SERVER_INVALID:

232

"Zeroconf server invalid",

233

avahi.SERVER_REGISTERING: None,

234

avahi.SERVER_COLLISION:

235

"Zeroconf server name collision",

236

avahi.SERVER_FAILURE:

237

"Zeroconf server failure" }

453

238

if state in bad_states:

454

if bad_states[state] is not None:

455

if error is None:

456

logger.error(bad_states[state])

457

else:

458

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

459

self.cleanup()

239

if bad_states[state]:

240

logger.error(bad_states[state])

241

self.remove()

460

242

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)

243

self.add()

473

244

else:

474

if error is None:

475

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

476

else:

477

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

478

245

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

479

246

def activate(self):

480

247

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

481

248

if self.server is None:

485

252

follow_name_owner_changes=True),

486

253

avahi.DBUS_INTERFACE_SERVER)

487

254

self.server.connect_to_signal("StateChanged",

488

self.server_state_changed)

255

self.server_state_changed)

489

256

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

490

257

491

258

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

259

class Client(object):

767

260

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

768

261

769

262

Attributes:

770

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

263

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

771

264

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

772

265

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

773

266

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

774

267

to see if the client lives.

775

268

'None' if no process is running.

776

checker_callback_tag: a GLib event source tag, or None

269

checker_callback_tag: a gobject event source tag, or None

777

270

checker_command: string; External command which is run to check

778

271

if client lives. %() expansions are done at

779

272

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

780

273

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

781

checker_initiator_tag: a GLib event source tag, or None

274

checker_initiator_tag: a gobject event source tag, or None

782

275

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

276

current_checker_command: string; current running checker_command

786

disable_initiator_tag: a GLib event source tag, or None

277

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

278

disable_initiator_tag: a gobject event source tag, or None

787

279

enabled: bool()

788

280

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

789

281

uniquely identify the client

791

283

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

792

284

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

793

285

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

286

last_enabled: datetime.datetime(); (UTC)

800

287

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

801

288

D-Bus identifiers

802

289

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

803

290

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

804

291

until this client is disabled

805

extended_timeout: extra long timeout when secret has been sent

806

292

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

293

"""

811

294

812

295

runtime_expansions = ("approval_delay", "approval_duration",

813

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

814

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

815

"last_approval_request", "last_checked_ok",

296

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

297

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

816

298

"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

299

829

300

@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):

301

def _timedelta_to_milliseconds(td):

302

"Convert a datetime.timedelta() to milliseconds"

303

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

304

+ (td.seconds * 1000)

305

+ (td.microseconds // 1000))

306

307

def timeout_milliseconds(self):

308

"Return the 'timeout' attribute in milliseconds"

309

return self._timedelta_to_milliseconds(self.timeout)

310

311

def interval_milliseconds(self):

312

"Return the 'interval' attribute in milliseconds"

313

return self._timedelta_to_milliseconds(self.interval)

314

315

def approval_delay_milliseconds(self):

316

return self._timedelta_to_milliseconds(self.approval_delay)

317

318

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

319

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

320

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

321

attribute."""

882

322

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

323

if config is None:

324

config = {}

900

325

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

326

# Uppercase and remove spaces from fingerprint for later

327

# comparison purposes with return value from the fingerprint()

328

# function

329

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

330

.replace(" ", ""))

901

331

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

902

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

903

datetime.datetime.utcnow())

904

905

# attributes specific for this server instance

332

if "secret" in config:

333

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

334

elif "secfile" in config:

335

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

336

(config["secfile"])),

337

"rb") as secfile:

338

self.secret = secfile.read()

339

else:

340

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

341

% self.name)

342

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

343

self.created = datetime.datetime.utcnow()

344

self.enabled = False

345

self.last_approval_request = None

346

self.last_enabled = None

347

self.last_checked_ok = None

348

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

349

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

350

self.disable_hook = disable_hook

906

351

self.checker = None

907

352

self.checker_initiator_tag = None

908

353

self.disable_initiator_tag = None

909

354

self.checker_callback_tag = None

355

self.checker_command = config["checker"]

910

356

self.current_checker_command = None

911

self.approved = None

357

self.last_connect = None

358

self._approved = None

359

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

360

True)

912

361

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)

362

self.approval_delay = string_to_delta(

363

config["approval_delay"])

364

self.approval_duration = string_to_delta(

365

config["approval_duration"])

366

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

924

367

925

# Send notice to process children that client state has changed

926

368

def send_changedstate(self):

927

with self.changedstate:

928

self.changedstate.notify_all()

929

369

self.changedstate.acquire()

370

self.changedstate.notify_all()

371

self.changedstate.release()

372

930

373

def enable(self):

931

374

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

932

375

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

933

376

# Already enabled

934

377

return

935

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

936

self.enabled = True

378

self.send_changedstate()

937

379

self.last_enabled = datetime.datetime.utcnow()

938

self.init_checker()

939

self.send_changedstate()

380

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

381

# and every interval from then on.

382

self.checker_initiator_tag = (gobject.timeout_add

383

(self.interval_milliseconds(),

384

self.start_checker))

385

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

386

self.disable_initiator_tag = (gobject.timeout_add

387

(self.timeout_milliseconds(),

388

self.disable))

389

self.enabled = True

390

# Also start a new checker *right now*.

391

self.start_checker()

940

392

941

393

def disable(self, quiet=True):

942

394

"""Disable this client."""

943

395

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

944

396

return False

945

397

if not quiet:

398

self.send_changedstate()

399

if not quiet:

946

400

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)

401

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

402

gobject.source_remove(self.disable_initiator_tag)

949

403

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)

404

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

405

gobject.source_remove(self.checker_initiator_tag)

953

406

self.checker_initiator_tag = None

954

407

self.stop_checker()

408

if self.disable_hook:

409

self.disable_hook(self)

955

410

self.enabled = False

956

if not quiet:

957

self.send_changedstate()

958

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

411

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

959

412

return False

960

413

961

414

def __del__(self):

415

self.disable_hook = None

962

416

self.disable()

963

417

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):

418

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

982

419

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

983

420

self.checker_callback_tag = None

984

421

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:

422

if os.WIFEXITED(condition):

423

exitstatus = os.WEXITSTATUS(condition)

424

if exitstatus == 0:

993

425

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

994

426

vars(self))

995

427

self.checked_ok()

996

428

else:

997

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

429

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

430

vars(self))

998

431

else:

999

self.last_checker_status = -1

1000

self.last_checker_signal = -returncode

1001

432

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

1002

433

vars(self))

1003

return False

1004

434

1005

435

def checked_ok(self):

1006

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

436

"""Bump up the timeout for this client.

437

438

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

439

alive and well.

440

"""

1007

441

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

442

gobject.source_remove(self.disable_initiator_tag)

443

self.disable_initiator_tag = (gobject.timeout_add

444

(self.timeout_milliseconds(),

445

self.disable))

1023

446

1024

447

def need_approval(self):

1025

448

self.last_approval_request = datetime.datetime.utcnow()

1030

453

If a checker already exists, leave it running and do

1031

454

nothing."""

1032

455

# 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

456

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

457

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

458

# client would inevitably timeout, since no checker would get

459

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

1037

460

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

1038

461

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

1039

462

# should be.

1040

463

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

464

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

465

try:

466

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

467

except (AttributeError, OSError) as error:

468

if (isinstance(error, OSError)

469

and error.errno != errno.ECHILD):

470

raise error

471

else:

472

if pid:

473

logger.warning("Checker was a zombie")

474

gobject.source_remove(self.checker_callback_tag)

475

self.checker_callback(pid, status,

476

self.current_checker_command)

1045

477

# Start a new checker if needed

1046

478

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

479

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

480

# In case checker_command has exactly one % operator

481

command = self.checker_command % self.host

482

except TypeError:

483

# Escape attributes for the shell

484

escaped_attrs = dict(

485

(attr,

486

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

487

errors=

488

'replace')))

489

for attr in

490

self.runtime_expansions)

491

492

try:

493

command = self.checker_command % escaped_attrs

494

except TypeError as error:

495

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

496

' %s', self.checker_command, error)

497

return True # Try again later

1058

498

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

499

try:

500

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

501

command, self.name)

502

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

503

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

504

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

505

# always replaced by /dev/null.)

506

self.checker = subprocess.Popen(command,

507

close_fds=True,

508

shell=True, cwd="/")

509

self.checker_callback_tag = (gobject.child_watch_add

510

(self.checker.pid,

511

self.checker_callback,

512

data=command))

513

# The checker may have completed before the gobject

514

# watch was added. Check for this.

515

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

516

if pid:

517

gobject.source_remove(self.checker_callback_tag)

518

self.checker_callback(pid, status, command)

519

except OSError as error:

520

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

521

error)

522

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

1085

523

return True

1086

524

1087

525

def stop_checker(self):

1088

526

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

1089

527

if self.checker_callback_tag:

1090

GLib.source_remove(self.checker_callback_tag)

528

gobject.source_remove(self.checker_callback_tag)

1091

529

self.checker_callback_tag = None

1092

530

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

1093

531

return

1094

532

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

1095

self.checker.terminate()

533

try:

534

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

535

#time.sleep(0.5)

536

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

537

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

538

except OSError as error:

539

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

540

raise

1096

541

self.checker = None

1097

542

1098

1099

def dbus_service_property(dbus_interface,

1100

signature="v",

1101

access="readwrite",

1102

byte_arrays=False):

543

def dbus_service_property(dbus_interface, signature="v",

544

access="readwrite", byte_arrays=False):

1103

545

"""Decorators for marking methods of a DBusObjectWithProperties to

1104

546

become properties on the D-Bus.

1105

547

1114

556

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

1115

557

if byte_arrays and signature != "ay":

1116

558

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

1117

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

1118

559

" signature %r" % signature)

1119

560

def decorator(func):

1120

561

func._dbus_is_property = True

1121

562

func._dbus_interface = dbus_interface

1126

567

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

1127

568

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1128

569

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

570

return decorator

1174

571

1175

572

1176

573

class DBusPropertyException(dbus.exceptions.DBusException):

1177

574

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

1178

575

"""

1179

pass

576

def __unicode__(self):

577

return unicode(str(self))

1180

578

1181

579

1182

580

class DBusPropertyAccessException(DBusPropertyException):

1191

589

pass

1192

590

1193

591

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):

592

class DBusObjectWithProperties(dbus.service.Object):

1284

593

"""A D-Bus object with properties.

1285

594

1286

595

Classes inheriting from this can use the dbus_service_property

1287

596

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

1288

597

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

1289

598

"""

1290

599

600

@staticmethod

601

def _is_dbus_property(obj):

602

return getattr(obj, "_dbus_is_property", False)

603

604

def _get_all_dbus_properties(self):

605

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

606

"""

607

return ((prop._dbus_name, prop)

608

for name, prop in

609

inspect.getmembers(self, self._is_dbus_property))

610

1291

611

def _get_dbus_property(self, interface_name, property_name):

1292

612

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

1293

613

property with the specified name and interface.

1294

614

"""

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

615

for name in (property_name,

616

property_name + "_dbus_property"):

617

prop = getattr(self, name, None)

618

if (prop is None

619

or not self._is_dbus_property(prop)

620

or prop._dbus_name != property_name

621

or (interface_name and prop._dbus_interface

622

and interface_name != prop._dbus_interface)):

623

continue

624

return prop

1302

625

# 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",

626

raise DBusPropertyNotFound(self.dbus_object_path + ":"

627

+ interface_name + "."

628

+ property_name)

629

630

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

1317

631

out_signature="v")

1318

632

def Get(self, interface_name, property_name):

1319

633

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

1337

651

# The byte_arrays option is not supported yet on

1338

652

# signatures other than "ay".

1339

653

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))

654

raise ValueError

655

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

656

for byte in value))

1345

657

prop(value)

1346

658

1347

@dbus.service.method(dbus.PROPERTIES_IFACE,

1348

in_signature="s",

659

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

1349

660

out_signature="a{sv}")

1350

661

def GetAll(self, interface_name):

1351

662

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

1352

663

standard.

1353

664

1354

665

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

1355

666

"""

1356

properties = {}

1357

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

667

all = {}

668

for name, prop in self._get_all_dbus_properties():

1358

669

if (interface_name

1359

670

and interface_name != prop._dbus_interface):

1360

671

# Interface non-empty but did not match

1364

675

continue

1365

676

value = prop()

1366

677

if not hasattr(value, "variant_level"):

1367

properties[name] = value

678

all[name] = value

1368

679

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

680

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

681

value.variant_level+1)

682

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

1380

683

1381

684

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1382

685

out_signature="s",

1383

686

path_keyword='object_path',

1384

687

connection_keyword='connection')

1385

688

def Introspect(self, object_path, connection):

1386

"""Overloading of standard D-Bus method.

1387

1388

Inserts property tags and interface annotation tags.

689

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

1389

690

"""

1390

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1391

object_path,

1392

connection)

691

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

692

connection)

1393

693

try:

1394

694

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

1395

1396

695

def make_tag(document, name, prop):

1397

696

e = document.createElement("property")

1398

697

e.setAttribute("name", name)

1399

698

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

1400

699

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

1401

700

return e

1402

1403

701

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

1404

# Add property tags

1405

702

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

1406

703

for name, prop

1407

in self._get_all_dbus_things("property")

704

in self._get_all_dbus_properties()

1408

705

if prop._dbus_interface

1409

706

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

1410

707

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

708

# Add the names to the return values for the

1428

709

# "org.freedesktop.DBus.Properties" methods

1429

710

if (if_tag.getAttribute("name")

1444

725

except (AttributeError, xml.dom.DOMException,

1445

726

xml.parsers.expat.ExpatError) as error:

1446

727

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"})

728

error)

729

return xmlstring

730

731

1695

732

class ClientDBus(Client, DBusObjectWithProperties):

1696

733

"""A Client class using D-Bus

1697

734

1701

738

"""

1702

739

1703

740

runtime_expansions = (Client.runtime_expansions

1704

+ ("dbus_object_path", ))

1705

1706

_interface = "se.recompile.Mandos.Client"

741

+ ("dbus_object_path",))

1707

742

1708

743

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

1709

744

1710

745

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

746

self._approvals_pending = 0

1711

747

self.bus = bus

1712

748

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

1713

749

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

1714

750

# the D-Bus

1715

client_object_name = str(self.name).translate(

751

client_object_name = unicode(self.name).translate(

1716

752

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

1717

753

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

1718

self.dbus_object_path = dbus.ObjectPath(

1719

"/clients/" + client_object_name)

754

self.dbus_object_path = (dbus.ObjectPath

755

("/clients/" + client_object_name))

1720

756

DBusObjectWithProperties.__init__(self, self.bus,

1721

757

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

758

759

def _get_approvals_pending(self):

760

return self._approvals_pending

761

def _set_approvals_pending(self, value):

762

old_value = self._approvals_pending

763

self._approvals_pending = value

764

bval = bool(value)

765

if (hasattr(self, "dbus_object_path")

766

and bval is not bool(old_value)):

767

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

768

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

769

dbus_bool)

770

771

approvals_pending = property(_get_approvals_pending,

772

_set_approvals_pending)

773

del _get_approvals_pending, _set_approvals_pending

774

775

@staticmethod

776

def _datetime_to_dbus(dt, variant_level=0):

777

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

778

return dbus.String(dt.isoformat(),

779

variant_level=variant_level)

780

781

def enable(self):

782

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

783

r = Client.enable(self)

784

if oldstate != self.enabled:

785

# Emit D-Bus signals

786

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

787

dbus.Boolean(True, variant_level=1))

788

self.PropertyChanged(

789

dbus.String("LastEnabled"),

790

self._datetime_to_dbus(self.last_enabled,

791

variant_level=1))

792

return r

793

794

def disable(self, quiet = False):

795

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

796

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

797

if not quiet and oldstate != self.enabled:

798

# Emit D-Bus signal

799

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

800

dbus.Boolean(False, variant_level=1))

801

return r

1803

802

1804

803

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

1805

804

try:

1810

809

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

1811

810

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

1812

811

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:

812

def checker_callback(self, pid, condition, command,

813

*args, **kwargs):

814

self.checker_callback_tag = None

815

self.checker = None

816

# Emit D-Bus signal

817

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

818

dbus.Boolean(False, variant_level=1))

819

if os.WIFEXITED(condition):

820

exitstatus = os.WEXITSTATUS(condition)

1820

821

# Emit D-Bus signal

1821

822

self.CheckerCompleted(dbus.Int16(exitstatus),

1822

# This is specific to GNU libC

1823

dbus.Int64(exitstatus << 8),

823

dbus.Int64(condition),

1824

824

dbus.String(command))

1825

825

else:

1826

826

# Emit D-Bus signal

1827

827

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

1828

dbus.Int64(

1829

# This is specific to GNU libC

1830

(exitstatus << 8)

1831

| self.last_checker_signal),

828

dbus.Int64(condition),

1832

829

dbus.String(command))

1833

return ret

830

831

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

832

*args, **kwargs)

833

834

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

835

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

836

# Emit D-Bus signal

837

self.PropertyChanged(

838

dbus.String("LastCheckedOK"),

839

(self._datetime_to_dbus(self.last_checked_ok,

840

variant_level=1)))

841

842

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

843

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

844

# Emit D-Bus signal

845

self.PropertyChanged(

846

dbus.String("LastApprovalRequest"),

847

(self._datetime_to_dbus(self.last_approval_request,

848

variant_level=1)))

849

return r

1834

850

1835

851

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

1836

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

852

old_checker = self.checker

853

if self.checker is not None:

854

old_checker_pid = self.checker.pid

855

else:

856

old_checker_pid = None

1837

857

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

1838

858

# Only if new checker process was started

1839

859

if (self.checker is not None

1840

860

and old_checker_pid != self.checker.pid):

1841

861

# Emit D-Bus signal

1842

862

self.CheckerStarted(self.current_checker_command)

863

self.PropertyChanged(

864

dbus.String("CheckerRunning"),

865

dbus.Boolean(True, variant_level=1))

1843

866

return r

1844

867

868

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

869

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

870

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

871

if (old_checker is not None

872

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

873

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

874

dbus.Boolean(False, variant_level=1))

875

return r

876

1845

877

def _reset_approved(self):

1846

self.approved = None

878

self._approved = None

1847

879

return False

1848

880

1849

881

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

882

self.send_changedstate()

883

self._approved = value

884

gobject.timeout_add(self._timedelta_to_milliseconds

885

(self.approval_duration),

886

self._reset_approved)

887

1854

888

1855

889

## D-Bus methods, signals & properties

1856

1857

## Interfaces

890

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

1858

891

1859

892

## Signals

1860

893

1871

904

pass

1872

905

1873

906

# PropertyChanged - signal

1874

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

1875

907

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

1876

908

def PropertyChanged(self, property, value):

1877

909

"D-Bus signal"

1911

943

self.checked_ok()

1912

944

1913

945

# Enable - method

1914

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

1915

946

@dbus.service.method(_interface)

1916

947

def Enable(self):

1917

948

"D-Bus method"

1918

949

self.enable()

1919

950

1920

951

# StartChecker - method

1921

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

1922

952

@dbus.service.method(_interface)

1923

953

def StartChecker(self):

1924

954

"D-Bus method"

1925

955

self.start_checker()

1926

956

1927

957

# Disable - method

1928

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

1929

958

@dbus.service.method(_interface)

1930

959

def Disable(self):

1931

960

"D-Bus method"

1932

961

self.disable()

1933

962

1934

963

# StopChecker - method

1935

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

1936

964

@dbus.service.method(_interface)

1937

965

def StopChecker(self):

1938

966

self.stop_checker()

1945

973

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

1946

974

1947

975

# ApprovedByDefault - property

1948

@dbus_service_property(_interface,

1949

signature="b",

976

@dbus_service_property(_interface, signature="b",

1950

977

access="readwrite")

1951

978

def ApprovedByDefault_dbus_property(self, value=None):

1952

979

if value is None: # get

1953

980

return dbus.Boolean(self.approved_by_default)

1954

981

self.approved_by_default = bool(value)

982

# Emit D-Bus signal

983

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

984

dbus.Boolean(value, variant_level=1))

1955

985

1956

986

# ApprovalDelay - property

1957

@dbus_service_property(_interface,

1958

signature="t",

987

@dbus_service_property(_interface, signature="t",

1959

988

access="readwrite")

1960

989

def ApprovalDelay_dbus_property(self, value=None):

1961

990

if value is None: # get

1962

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

1963

* 1000)

991

return dbus.UInt64(self.approval_delay_milliseconds())

1964

992

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

993

# Emit D-Bus signal

994

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

995

dbus.UInt64(value, variant_level=1))

1965

996

1966

997

# ApprovalDuration - property

1967

@dbus_service_property(_interface,

1968

signature="t",

998

@dbus_service_property(_interface, signature="t",

1969

999

access="readwrite")

1970

1000

def ApprovalDuration_dbus_property(self, value=None):

1971

1001

if value is None: # get

1972

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

1973

* 1000)

1002

return dbus.UInt64(self._timedelta_to_milliseconds(

1003

self.approval_duration))

1974

1004

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

1005

# Emit D-Bus signal

1006

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

1007

dbus.UInt64(value, variant_level=1))

1975

1008

1976

1009

# Name - property

1977

@dbus_annotations(

1978

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

1979

1010

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

1980

1011

def Name_dbus_property(self):

1981

1012

return dbus.String(self.name)

1982

1013

1983

1014

# Fingerprint - property

1984

@dbus_annotations(

1985

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

1986

1015

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

1987

1016

def Fingerprint_dbus_property(self):

1988

1017

return dbus.String(self.fingerprint)

1989

1018

1990

1019

# Host - property

1991

@dbus_service_property(_interface,

1992

signature="s",

1020

@dbus_service_property(_interface, signature="s",

1993

1021

access="readwrite")

1994

1022

def Host_dbus_property(self, value=None):

1995

1023

if value is None: # get

1996

1024

return dbus.String(self.host)

1997

self.host = str(value)

1025

self.host = value

1026

# Emit D-Bus signal

1027

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

1028

dbus.String(value, variant_level=1))

1998

1029

1999

1030

# Created - property

2000

@dbus_annotations(

2001

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

2002

1031

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

2003

1032

def Created_dbus_property(self):

2004

return datetime_to_dbus(self.created)

1033

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

2005

1034

2006

1035

# LastEnabled - property

2007

1036

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

2008

1037

def LastEnabled_dbus_property(self):

2009

return datetime_to_dbus(self.last_enabled)

1038

if self.last_enabled is None:

1039

return dbus.String("")

1040

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

2010

1041

2011

1042

# Enabled - property

2012

@dbus_service_property(_interface,

2013

signature="b",

1043

@dbus_service_property(_interface, signature="b",

2014

1044

access="readwrite")

2015

1045

def Enabled_dbus_property(self, value=None):

2016

1046

if value is None: # get

2021

1051

self.disable()

2022

1052

2023

1053

# LastCheckedOK - property

2024

@dbus_service_property(_interface,

2025

signature="s",

1054

@dbus_service_property(_interface, signature="s",

2026

1055

access="readwrite")

2027

1056

def LastCheckedOK_dbus_property(self, value=None):

2028

1057

if value is not None:

2029

1058

self.checked_ok()

2030

1059

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)

1060

if self.last_checked_ok is None:

1061

return dbus.String("")

1062

return dbus.String(self._datetime_to_dbus(self

1063

.last_checked_ok))

2042

1064

2043

1065

# LastApprovalRequest - property

2044

1066

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

2045

1067

def LastApprovalRequest_dbus_property(self):

2046

return datetime_to_dbus(self.last_approval_request)

1068

if self.last_approval_request is None:

1069

return dbus.String("")

1070

return dbus.String(self.

1071

_datetime_to_dbus(self

1072

.last_approval_request))

2047

1073

2048

1074

# Timeout - property

2049

@dbus_service_property(_interface,

2050

signature="t",

1075

@dbus_service_property(_interface, signature="t",

2051

1076

access="readwrite")

2052

1077

def Timeout_dbus_property(self, value=None):

2053

1078

if value is None: # get

2054

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

2055

old_timeout = self.timeout

1079

return dbus.UInt64(self.timeout_milliseconds())

2056

1080

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)

1081

# Emit D-Bus signal

1082

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

1083

dbus.UInt64(value, variant_level=1))

1084

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

1085

return

1086

# Reschedule timeout

1087

gobject.source_remove(self.disable_initiator_tag)

1088

self.disable_initiator_tag = None

1089

time_to_die = (self.

1090

_timedelta_to_milliseconds((self

1091

.last_checked_ok

1092

+ self.timeout)

1093

- datetime.datetime

1094

.utcnow()))

1095

if time_to_die <= 0:

1096

# The timeout has passed

1097

self.disable()

1098

else:

1099

self.disable_initiator_tag = (gobject.timeout_add

1100

(time_to_die, self.disable))

2082

1101

2083

1102

# Interval - property

2084

@dbus_service_property(_interface,

2085

signature="t",

1103

@dbus_service_property(_interface, signature="t",

2086

1104

access="readwrite")

2087

1105

def Interval_dbus_property(self, value=None):

2088

1106

if value is None: # get

2089

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

1107

return dbus.UInt64(self.interval_milliseconds())

2090

1108

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

1109

# Emit D-Bus signal

1110

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

1111

dbus.UInt64(value, variant_level=1))

2091

1112

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

2092

1113

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

1114

# Reschedule checker run

1115

gobject.source_remove(self.checker_initiator_tag)

1116

self.checker_initiator_tag = (gobject.timeout_add

1117

(value, self.start_checker))

1118

self.start_checker() # Start one now, too

1119

2100

1120

# Checker - property

2101

@dbus_service_property(_interface,

2102

signature="s",

1121

@dbus_service_property(_interface, signature="s",

2103

1122

access="readwrite")

2104

1123

def Checker_dbus_property(self, value=None):

2105

1124

if value is None: # get

2106

1125

return dbus.String(self.checker_command)

2107

self.checker_command = str(value)

1126

self.checker_command = value

1127

# Emit D-Bus signal

1128

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

1129

dbus.String(self.checker_command,

1130

variant_level=1))

2108

1131

2109

1132

# CheckerRunning - property

2110

@dbus_service_property(_interface,

2111

signature="b",

1133

@dbus_service_property(_interface, signature="b",

2112

1134

access="readwrite")

2113

1135

def CheckerRunning_dbus_property(self, value=None):

2114

1136

if value is None: # get

2119

1141

self.stop_checker()

2120

1142

2121

1143

# ObjectPath - property

2122

@dbus_annotations(

2123

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

2124

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

2125

1144

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

2126

1145

def ObjectPath_dbus_property(self):

2127

1146

return self.dbus_object_path # is already a dbus.ObjectPath

2128

1147

2129

1148

# 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)

1149

@dbus_service_property(_interface, signature="ay",

1150

access="write", byte_arrays=True)

2137

1151

def Secret_dbus_property(self, value):

2138

self.secret = bytes(value)

1152

self.secret = str(value)

2139

1153

2140

1154

del _interface

2141

1155

2145

1159

self._pipe = child_pipe

2146

1160

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

2147

1161

if not self._pipe.recv():

2148

raise KeyError(fpr)

2149

1162

raise KeyError()

1163

2150

1164

def __getattribute__(self, name):

2151

if name == '_pipe':

1165

if(name == '_pipe'):

2152

1166

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

2153

1167

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

2154

1168

data = self._pipe.recv()

2155

1169

if data[0] == 'data':

2156

1170

return data[1]

2157

1171

if data[0] == 'function':

2158

2159

1172

def func(*args, **kwargs):

2160

1173

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

2161

1174

return self._pipe.recv()[1]

2162

2163

1175

return func

2164

1176

2165

1177

def __setattr__(self, name, value):

2166

if name == '_pipe':

1178

if(name == '_pipe'):

2167

1179

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

2168

1180

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

2169

1181

2177

1189

def handle(self):

2178

1190

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

2179

1191

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

2180

str(self.client_address))

1192

unicode(self.client_address))

2181

1193

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

2182

1194

self.server.child_pipe.fileno())

2183

2184

session = gnutls.ClientSession(self.request)

2185

1195

1196

session = (gnutls.connection

1197

.ClientSession(self.request,

1198

gnutls.connection

1199

.X509Credentials()))

1200

1201

# Note: gnutls.connection.X509Credentials is really a

1202

# generic GnuTLS certificate credentials object so long as

1203

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

1204

# here despite using OpenPGP certificates.

1205

2186

1206

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

2187

1207

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

2188

1208

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

2191

1211

priority = self.server.gnutls_priority

2192

1212

if priority is None:

2193

1213

priority = "NORMAL"

2194

gnutls.priority_set_direct(session._c_object,

2195

priority.encode("utf-8"),

2196

None)

2197

1214

(gnutls.library.functions

1215

.gnutls_priority_set_direct(session._c_object,

1216

priority, None))

1217

2198

1218

# Start communication using the Mandos protocol

2199

1219

# Get protocol number

2200

1220

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

2201

1221

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

2202

1222

try:

2203

1223

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

2204

raise RuntimeError(line)

1224

raise RuntimeError

2205

1225

except (ValueError, IndexError, RuntimeError) as error:

2206

1226

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

2207

1227

return

2208

1228

2209

1229

# Start GnuTLS connection

2210

1230

try:

2211

1231

session.handshake()

2212

except gnutls.Error as error:

1232

except gnutls.errors.GNUTLSError as error:

2213

1233

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

2214

1234

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

2215

1235

# established. Just abandon the request.

2216

1236

return

2217

1237

logger.debug("Handshake succeeded")

2218

1238

2219

1239

approval_required = False

2220

1240

try:

2221

1241

try:

2222

fpr = self.fingerprint(

2223

self.peer_certificate(session))

2224

except (TypeError, gnutls.Error) as error:

1242

fpr = self.fingerprint(self.peer_certificate

1243

(session))

1244

except (TypeError,

1245

gnutls.errors.GNUTLSError) as error:

2225

1246

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

2226

1247

return

2227

1248

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

2228

1249

2229

1250

try:

2230

1251

client = ProxyClient(child_pipe, fpr,

2231

1252

self.client_address)

2239

1260

2240

1261

while True:

2241

1262

if not client.enabled:

2242

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

2243

client.name)

1263

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

1264

client.name)

2244

1265

if self.server.use_dbus:

2245

1266

# Emit D-Bus signal

2246

client.Rejected("Disabled")

1267

client.Rejected("Disabled")

2247

1268

return

2248

1269

2249

if client.approved or not client.approval_delay:

1270

if client._approved or not client.approval_delay:

2250

1271

#We are approved or approval is disabled

2251

1272

break

2252

elif client.approved is None:

1273

elif client._approved is None:

2253

1274

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

2254

1275

client.name)

2255

1276

if self.server.use_dbus:

2256

1277

# Emit D-Bus signal

2257

1278

client.NeedApproval(

2258

client.approval_delay.total_seconds()

2259

* 1000, client.approved_by_default)

1279

client.approval_delay_milliseconds(),

1280

client.approved_by_default)

2260

1281

else:

2261

1282

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

2262

1283

client.name)

2266

1287

return

2267

1288

2268

1289

#wait until timeout or approved

1290

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

2269

1291

time = datetime.datetime.now()

2270

1292

client.changedstate.acquire()

2271

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

1293

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

2272

1294

client.changedstate.release()

2273

1295

time2 = datetime.datetime.now()

2274

1296

if (time2 - time) >= delay:

2285

1307

else:

2286

1308

delay -= time2 - time

2287

1309

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

1310

sent_size = 0

1311

while sent_size < len(client.secret):

1312

try:

1313

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

1314

except gnutls.errors.GNUTLSError as error:

1315

logger.warning("gnutls send failed")

1316

return

1317

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

1318

sent, len(client.secret)

1319

- (sent_size + sent))

1320

sent_size += sent

1321

2295

1322

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

2296

# bump the timeout using extended_timeout

2297

client.bump_timeout(client.extended_timeout)

1323

# bump the timeout as if seen

1324

client.checked_ok()

2298

1325

if self.server.use_dbus:

2299

1326

# Emit D-Bus signal

2300

1327

client.GotSecret()

2304

1331

client.approvals_pending -= 1

2305

1332

try:

2306

1333

session.bye()

2307

except gnutls.Error as error:

2308

logger.warning("GnuTLS bye failed",

2309

exc_info=error)

1334

except gnutls.errors.GNUTLSError as error:

1335

logger.warning("GnuTLS bye failed")

2310

1336

2311

1337

@staticmethod

2312

1338

def peer_certificate(session):

2313

1339

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

2314

1340

# 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""

1341

if (gnutls.library.functions

1342

.gnutls_certificate_type_get(session._c_object)

1343

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1344

# ...do the normal thing

1345

return session.peer_certificate

2319

1346

list_size = ctypes.c_uint(1)

2320

cert_list = (gnutls.certificate_get_peers

1347

cert_list = (gnutls.library.functions

1348

.gnutls_certificate_get_peers

2321

1349

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

2322

1350

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

2323

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

1351

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

1352

" certificate")

2324

1353

if list_size.value == 0:

2325

1354

return None

2326

1355

cert = cert_list[0]

2330

1359

def fingerprint(openpgp):

2331

1360

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2332

1361

# 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)))

1362

datum = (gnutls.library.types

1363

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

1364

ctypes.POINTER

1365

(ctypes.c_ubyte)),

1366

ctypes.c_uint(len(openpgp))))

2337

1367

# New empty GnuTLS certificate

2338

crt = gnutls.openpgp_crt_t()

2339

gnutls.openpgp_crt_init(ctypes.byref(crt))

1368

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1369

(gnutls.library.functions

1370

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2340

1371

# Import the OpenPGP public key into the certificate

2341

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

2342

gnutls.OPENPGP_FMT_RAW)

1372

(gnutls.library.functions

1373

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

1374

gnutls.library.constants

1375

.GNUTLS_OPENPGP_FMT_RAW))

2343

1376

# Verify the self signature in the key

2344

1377

crtverify = ctypes.c_uint()

2345

gnutls.openpgp_crt_verify_self(crt, 0,

2346

ctypes.byref(crtverify))

1378

(gnutls.library.functions

1379

.gnutls_openpgp_crt_verify_self(crt, 0,

1380

ctypes.byref(crtverify)))

2347

1381

if crtverify.value != 0:

2348

gnutls.openpgp_crt_deinit(crt)

2349

raise gnutls.CertificateSecurityError("Verify failed")

1382

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1383

raise (gnutls.errors.CertificateSecurityError

1384

("Verify failed"))

2350

1385

# New buffer for the fingerprint

2351

1386

buf = ctypes.create_string_buffer(20)

2352

1387

buf_len = ctypes.c_size_t()

2353

1388

# Get the fingerprint from the certificate into the buffer

2354

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

2355

ctypes.byref(buf_len))

1389

(gnutls.library.functions

1390

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

1391

ctypes.byref(buf_len)))

2356

1392

# Deinit the certificate

2357

gnutls.openpgp_crt_deinit(crt)

1393

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2358

1394

# Convert the buffer to a Python bytestring

2359

1395

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

2360

1396

# Convert the bytestring to hexadecimal notation

2361

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

1397

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

2362

1398

return hex_fpr

2363

1399

2364

1400

2365

1401

class MultiprocessingMixIn(object):

2366

1402

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

2367

2368

1403

def sub_process_main(self, request, address):

2369

1404

try:

2370

1405

self.finish_request(request, address)

2371

except Exception:

1406

except:

2372

1407

self.handle_error(request, address)

2373

1408

self.close_request(request)

2374

1409

2375

1410

def process_request(self, request, address):

2376

1411

"""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

1412

multiprocessing.Process(target = self.sub_process_main,

1413

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

2382

1414

2383

1415

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2384

1416

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

2385

2386

1417

def process_request(self, request, client_address):

2387

1418

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

2388

1419

2389

1420

This function creates a new pipe in self.pipe

2390

1421

"""

2391

1422

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2392

2393

proc = MultiprocessingMixIn.process_request(self, request,

2394

client_address)

1423

1424

super(MultiprocessingMixInWithPipe,

1425

self).process_request(request, client_address)

2395

1426

self.child_pipe.close()

2396

self.add_pipe(parent_pipe, proc)

2397

2398

def add_pipe(self, parent_pipe, proc):

1427

self.add_pipe(parent_pipe)

1428

1429

def add_pipe(self, parent_pipe):

2399

1430

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

2400

raise NotImplementedError()

2401

1431

raise NotImplementedError

2402

1432

2403

1433

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2404

1434

socketserver.TCPServer, object):

2409

1439

interface: None or a network interface name (string)

2410

1440

use_ipv6: Boolean; to use IPv6 or not

2411

1441

"""

2412

2413

1442

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

"""

1443

interface=None, use_ipv6=True):

2420

1444

self.interface = interface

2421

1445

if use_ipv6:

2422

1446

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

1447

socketserver.TCPServer.__init__(self, server_address,

2450

1448

RequestHandlerClass)

2451

2452

1449

def server_bind(self):

2453

1450

"""This overrides the normal server_bind() function

2454

1451

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

2455

1452

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

2456

global SO_BINDTODEVICE

2457

1453

if self.interface is not None:

2458

1454

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

1455

logger.error("SO_BINDTODEVICE does not exist;"

1456

" cannot bind to interface %s",

1457

self.interface)

1458

else:

1459

try:

1460

self.socket.setsockopt(socket.SOL_SOCKET,

1461

SO_BINDTODEVICE,

1462

str(self.interface

1463

+ '\0'))

1464

except socket.error as error:

1465

if error[0] == errno.EPERM:

1466

logger.error("No permission to"

1467

" bind to interface %s",

1468

self.interface)

1469

elif error[0] == errno.ENOPROTOOPT:

1470

logger.error("SO_BINDTODEVICE not available;"

1471

" cannot bind to interface %s",

1472

self.interface)

1473

else:

1474

raise

2480

1475

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

2481

1476

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

2482

1477

if not self.server_address[0]:

2483

1478

if self.address_family == socket.AF_INET6:

2484

1479

any_address = "::" # in6addr_any

2485

1480

else:

2486

any_address = "0.0.0.0" # INADDR_ANY

1481

any_address = socket.INADDR_ANY

2487

1482

self.server_address = (any_address,

2488

1483

self.server_address[1])

2489

1484

elif not self.server_address[1]:

2490

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

1485

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

1486

0)

2491

1487

# if self.interface:

2492

1488

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

2493

1489

# 0, # port

2505

1501

gnutls_priority GnuTLS priority string

2506

1502

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

2507

1503

2508

Assumes a GLib.MainLoop event loop.

1504

Assumes a gobject.MainLoop event loop.

2509

1505

"""

2510

2511

1506

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):

1507

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

1508

gnutls_priority=None, use_dbus=True):

2518

1509

self.enabled = False

2519

1510

self.clients = clients

2520

1511

if self.clients is None:

2521

self.clients = {}

1512

self.clients = set()

2522

1513

self.use_dbus = use_dbus

2523

1514

self.gnutls_priority = gnutls_priority

2524

1515

IPv6_TCPServer.__init__(self, server_address,

2525

1516

RequestHandlerClass,

2526

1517

interface = interface,

2527

use_ipv6 = use_ipv6,

2528

socketfd = socketfd)

2529

1518

use_ipv6 = use_ipv6)

2530

1519

def server_activate(self):

2531

1520

if self.enabled:

2532

1521

return socketserver.TCPServer.server_activate(self)

2533

2534

1522

def enable(self):

2535

1523

self.enabled = True

2536

2537

def add_pipe(self, parent_pipe, proc):

1524

def add_pipe(self, parent_pipe):

2538

1525

# 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,

1526

gobject.io_add_watch(parent_pipe.fileno(),

1527

gobject.IO_IN | gobject.IO_HUP,

1528

functools.partial(self.handle_ipc,

1529

parent_pipe = parent_pipe))

1530

1531

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

2549

1532

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()

1533

condition_names = {

1534

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

1535

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

1536

# blocking).

1537

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

1538

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

1539

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

1540

# broken, usually for pipes and

1541

# sockets).

1542

}

1543

conditions_string = ' | '.join(name

1544

for cond, name in

1545

condition_names.iteritems()

1546

if cond & condition)

1547

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

1548

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

2554

1549

return False

2555

1550

2556

1551

# Read a request from the child

2561

1556

fpr = request[1]

2562

1557

address = request[2]

2563

1558

2564

for c in self.clients.values():

1559

for c in self.clients:

2565

1560

if c.fingerprint == fpr:

2566

1561

client = c

2567

1562

break

2568

1563

else:

2569

logger.info("Client not found for fingerprint: %s, ad"

2570

"dress: %s", fpr, address)

1564

logger.warning("Client not found for fingerprint: %s, ad"

1565

"dress: %s", fpr, address)

2571

1566

if self.use_dbus:

2572

1567

# Emit D-Bus signal

2573

mandos_dbus_service.ClientNotFound(fpr,

2574

address[0])

1568

mandos_dbus_service.ClientNotFound(fpr, address[0])

2575

1569

parent_pipe.send(False)

2576

1570

return False

2577

1571

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))

1572

gobject.io_add_watch(parent_pipe.fileno(),

1573

gobject.IO_IN | gobject.IO_HUP,

1574

functools.partial(self.handle_ipc,

1575

parent_pipe = parent_pipe,

1576

client_object = client))

2585

1577

parent_pipe.send(True)

2586

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

2587

# same fileno

1578

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

2588

1579

return False

2589

1580

if command == 'funcall':

2590

1581

funcname = request[1]

2591

1582

args = request[2]

2592

1583

kwargs = request[3]

2593

1584

2594

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

2595

funcname)(*args,

2596

**kwargs)))

2597

1585

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

1586

2598

1587

if command == 'getattr':

2599

1588

attrname = request[1]

2600

if isinstance(client_object.__getattribute__(attrname),

2601

collections.Callable):

2602

parent_pipe.send(('function', ))

1589

if callable(client_object.__getattribute__(attrname)):

1590

parent_pipe.send(('function',))

2603

1591

else:

2604

parent_pipe.send((

2605

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

1592

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

2606

1593

2607

1594

if command == 'setattr':

2608

1595

attrname = request[1]

2609

1596

value = request[2]

2610

1597

setattr(client_object, attrname, value)

2611

1598

2612

1599

return True

2613

1600

2614

1601

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

1602

def string_to_delta(interval):

2712

1603

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

2713

1604

2724

1615

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

2725

1616

datetime.timedelta(0, 330)

2726

1617

"""

2727

2728

try:

2729

return rfc3339_duration_to_delta(interval)

2730

except ValueError:

2731

pass

2732

2733

1618

timevalue = datetime.timedelta(0)

2734

1619

for s in interval.split():

2735

1620

try:

2736

suffix = s[-1]

1621

suffix = unicode(s[-1])

2737

1622

value = int(s[:-1])

2738

1623

if suffix == "d":

2739

1624

delta = datetime.timedelta(value)

2746

1631

elif suffix == "w":

2747

1632

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

2748

1633

else:

2749

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

2750

except IndexError as e:

1634

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

1635

except (ValueError, IndexError) as e:

2751

1636

raise ValueError(*(e.args))

2752

1637

timevalue += delta

2753

1638

return timevalue

2754

1639

2755

1640

1641

def if_nametoindex(interface):

1642

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

1643

1644

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

1645

global if_nametoindex

1646

try:

1647

if_nametoindex = (ctypes.cdll.LoadLibrary

1648

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

1649

.if_nametoindex)

1650

except (OSError, AttributeError):

1651

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

1652

def if_nametoindex(interface):

1653

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

1654

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

1655

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

1656

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1657

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

1658

interface))

1659

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

1660

ifreq[16:20])[0]

1661

return interface_index

1662

return if_nametoindex(interface)

1663

1664

2756

1665

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

2757

1666

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

2758

1667

2766

1675

sys.exit()

2767

1676

if not noclose:

2768

1677

# Close all standard open file descriptors

2769

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

1678

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

2770

1679

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

2771

1680

raise OSError(errno.ENODEV,

2772

"{} not a character device"

2773

.format(os.devnull))

1681

"%s not a character device"

1682

% os.path.devnull)

2774

1683

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

2775

1684

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

2776

1685

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

2785

1694

2786

1695

parser = argparse.ArgumentParser()

2787

1696

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

2788

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

1697

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

2789

1698

help="show version number and exit")

2790

1699

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

2791

1700

help="Bind to interface IF")

2797

1706

help="Run self-test")

2798

1707

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

2799

1708

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

2800

" to terminal", default=None)

1709

" to terminal")

2801

1710

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

2802

1711

help="Debug level for stdout output")

2803

1712

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

2810

1719

" files")

2811

1720

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

2812

1721

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

2813

" system bus interface", default=None)

1722

" system bus interface")

2814

1723

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

1724

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

2831

1725

options = parser.parse_args()

2832

1726

2833

1727

if options.check:

2834

1728

import doctest

2835

fail_count, test_count = doctest.testmod()

2836

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

1729

doctest.testmod()

1730

sys.exit()

2837

1731

2838

1732

# Default values for config file for server-global settings

2839

1733

server_defaults = { "interface": "",

2841

1735

"port": "",

2842

1736

"debug": "False",

2843

1737

"priority":

2844

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

2845

":+SIGN-DSA-SHA256",

1738

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

2846

1739

"servicename": "Mandos",

2847

1740

"use_dbus": "True",

2848

1741

"use_ipv6": "True",

2849

1742

"debuglevel": "",

2850

"restore": "True",

2851

"socket": "",

2852

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

2853

"foreground": "False",

2854

"zeroconf": "True",

2855

}

1743

}

2856

1744

2857

1745

# Parse config file for server-global settings

2858

1746

server_config = configparser.SafeConfigParser(server_defaults)

2859

1747

del server_defaults

2860

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

1748

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

1749

"mandos.conf"))

2861

1750

# Convert the SafeConfigParser object to a dict

2862

1751

server_settings = server_config.defaults()

2863

1752

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

2864

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

1753

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

2865

1754

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

2866

1755

option)

2867

1756

if server_settings["port"]:

2868

1757

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

2869

1758

"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

1759

del server_config

2880

1760

2881

1761

# Override the settings from the config file with command line

2882

1762

# options, if set.

2883

1763

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

2884

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

2885

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

2886

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

1764

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

1765

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

2887

1766

value = getattr(options, option)

2888

1767

if value is not None:

2889

1768

server_settings[option] = value

2890

1769

del options

2891

1770

# Force all strings to be unicode

2892

1771

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

1772

if type(server_settings[option]) is str:

1773

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

2903

1774

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

2904

1775

2905

1776

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

2906

1777

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

1778

# For convenience

2913

1779

debug = server_settings["debug"]

2914

1780

debuglevel = server_settings["debuglevel"]

2915

1781

use_dbus = server_settings["use_dbus"]

2916

1782

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

1783

2931

1784

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

2932

syslogger.setFormatter(

2933

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

2934

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

2935

server_settings["servicename"])))

1785

syslogger.setFormatter(logging.Formatter

1786

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

1787

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

1788

% server_settings["servicename"]))

2936

1789

2937

1790

# Parse config file with clients

2938

client_config = configparser.SafeConfigParser(Client

2939

.client_defaults)

1791

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

1792

"interval": "5m",

1793

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

1794

"host": "",

1795

"approval_delay": "0s",

1796

"approval_duration": "1s",

1797

}

1798

client_config = configparser.SafeConfigParser(client_defaults)

2940

1799

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

2941

1800

"clients.conf"))

2942

1801

2943

1802

global mandos_dbus_service

2944

1803

mandos_dbus_service = None

2945

1804

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

1805

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

1806

server_settings["port"]),

1807

ClientHandler,

1808

interface=(server_settings["interface"]

1809

or None),

1810

use_ipv6=use_ipv6,

1811

gnutls_priority=

1812

server_settings["priority"],

1813

use_dbus=use_dbus)

1814

if not debug:

1815

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

2962

1816

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)

1817

pidfile = open(pidfilename, "w")

1818

except IOError:

1819

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

2967

1820

2968

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

2969

("mandos", "mandos"),

2970

("nobody", "nogroup")):

1821

try:

1822

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

1823

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

1824

except KeyError:

2971

1825

try:

2972

uid = pwd.getpwnam(name).pw_uid

2973

gid = pwd.getpwnam(group).pw_gid

2974

break

1826

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

1827

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

2975

1828

except KeyError:

2976

continue

2977

else:

2978

uid = 65534

2979

gid = 65534

1829

try:

1830

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

1831

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

1832

except KeyError:

1833

uid = 65534

1834

gid = 65534

2980

1835

try:

2981

1836

os.setgid(gid)

2982

1837

os.setuid(uid)

2983

if debug:

2984

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

2985

gid))

2986

1838

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

1839

if error[0] != errno.EPERM:

1840

raise error

2991

1841

1842

if not debug and not debuglevel:

1843

syslogger.setLevel(logging.WARNING)

1844

console.setLevel(logging.WARNING)

1845

if debuglevel:

1846

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

1847

syslogger.setLevel(level)

1848

console.setLevel(level)

1849

2992

1850

if debug:

2993

1851

# Enable all possible GnuTLS debugging

2994

1852

2995

1853

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

2996

1854

# - GnuTLS manual

2997

gnutls.global_set_log_level(11)

1855

gnutls.library.functions.gnutls_global_set_log_level(11)

2998

1856

2999

@gnutls.log_func

1857

@gnutls.library.types.gnutls_log_func

3000

1858

def debug_gnutls(level, string):

3001

1859

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

3002

1860

3003

gnutls.global_set_log_function(debug_gnutls)

1861

(gnutls.library.functions

1862

.gnutls_global_set_log_function(debug_gnutls))

3004

1863

3005

1864

# Redirect stdin so all checkers get /dev/null

3006

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

1865

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

3007

1866

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

3008

1867

if null > 2:

3009

1868

os.close(null)

1869

else:

1870

# No console logging

1871

logger.removeHandler(console)

3010

1872

3011

1873

# Need to fork before connecting to D-Bus

3012

if not foreground:

1874

if not debug:

3013

1875

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

3014

1876

daemon()

3015

1877

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

1878

global main_loop

3021

1879

# From the Avahi example code

3022

DBusGMainLoop(set_as_default=True)

3023

main_loop = GLib.MainLoop()

1880

DBusGMainLoop(set_as_default=True )

1881

main_loop = gobject.MainLoop()

3024

1882

bus = dbus.SystemBus()

3025

1883

# End of Avahi example code

3026

1884

if use_dbus:

3027

1885

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)

1886

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

1887

bus, do_not_queue=True)

1888

except dbus.exceptions.NameExistsException as e:

1889

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

3036

1890

use_dbus = False

3037

1891

server_settings["use_dbus"] = False

3038

1892

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"))

1893

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1894

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

1895

servicetype = "_mandos._tcp",

1896

protocol = protocol, bus = bus)

1897

if server_settings["interface"]:

1898

service.interface = (if_nametoindex

1899

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

3049

1900

3050

1901

global multiprocessing_manager

3051

1902

multiprocessing_manager = multiprocessing.Manager()

3053

1904

client_class = Client

3054

1905

if use_dbus:

3055

1906

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))

1907

def client_config_items(config, section):

1908

special_settings = {

1909

"approved_by_default":

1910

lambda: config.getboolean(section,

1911

"approved_by_default"),

1912

}

1913

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

3183

1914

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

1915

yield (name, special_settings[name]())

1916

except KeyError:

1917

yield (name, value)

1918

1919

tcp_server.clients.update(set(

1920

client_class(name = section,

1921

config= dict(client_config_items(

1922

client_config, section)))

1923

for section in client_config.sections()))

3209

1924

if not tcp_server.clients:

3210

1925

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

1926

1927

if not debug:

1928

try:

1929

with pidfile:

1930

pid = os.getpid()

1931

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

1932

del pidfile

1933

except IOError:

1934

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

1935

pidfilename, pid)

1936

except NameError:

1937

# "pidfile" was never created

1938

pass

3222

1939

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)

1940

1941

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

1942

1943

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

1944

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

3227

1945

3228

1946

if use_dbus:

3229

3230

@alternate_dbus_interfaces(

3231

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

3232

class MandosDBusService(DBusObjectWithObjectManager):

1947

class MandosDBusService(dbus.service.Object):

3233

1948

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

3234

3235

1949

def __init__(self):

3236

1950

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

3237

3238

_interface = "se.recompile.Mandos"

1951

_interface = "se.bsnet.fukt.Mandos"

3239

1952

3240

1953

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

3241

1954

def ClientAdded(self, objpath):

3247

1960

"D-Bus signal"

3248

1961

pass

3249

1962

3250

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

3251

"true"})

3252

1963

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

3253

1964

def ClientRemoved(self, objpath, name):

3254

1965

"D-Bus signal"

3255

1966

pass

3256

1967

3257

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

3258

"true"})

3259

1968

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

3260

1969

def GetAllClients(self):

3261

1970

"D-Bus method"

3262

return dbus.Array(c.dbus_object_path for c in

3263

tcp_server.clients.values())

1971

return dbus.Array(c.dbus_object_path

1972

for c in tcp_server.clients)

3264

1973

3265

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

3266

"true"})

3267

1974

@dbus.service.method(_interface,

3268

1975

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

3269

1976

def GetAllClientsWithProperties(self):

3270

1977

"D-Bus method"

3271

1978

return dbus.Dictionary(

3272

{ c.dbus_object_path: c.GetAll(

3273

"se.recompile.Mandos.Client")

3274

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

1979

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

1980

for c in tcp_server.clients),

3275

1981

signature="oa{sv}")

3276

1982

3277

1983

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

3278

1984

def RemoveClient(self, object_path):

3279

1985

"D-Bus method"

3280

for c in tcp_server.clients.values():

1986

for c in tcp_server.clients:

3281

1987

if c.dbus_object_path == object_path:

3282

del tcp_server.clients[c.name]

1988

tcp_server.clients.remove(c)

3283

1989

c.remove_from_connection()

3284

# Don't signal the disabling

1990

# Don't signal anything except ClientRemoved

3285

1991

c.disable(quiet=True)

3286

# Emit D-Bus signal for removal

3287

self.client_removed_signal(c)

1992

# Emit D-Bus signal

1993

self.ClientRemoved(object_path, c.name)

3288

1994

return

3289

1995

raise KeyError(object_path)

3290

1996

3291

1997

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

1998

3329

1999

mandos_dbus_service = MandosDBusService()

3330

2000

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

2001

def cleanup():

3336

2002

"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

2003

service.cleanup()

2004

3399

2005

while tcp_server.clients:

3400

name, client = tcp_server.clients.popitem()

2006

client = tcp_server.clients.pop()

3401

2007

if use_dbus:

3402

2008

client.remove_from_connection()

3403

# Don't signal the disabling

2009

client.disable_hook = None

2010

# Don't signal anything except ClientRemoved

3404

2011

client.disable(quiet=True)

3405

# Emit D-Bus signal for removal

3406

2012

if use_dbus:

3407

mandos_dbus_service.client_removed_signal(client)

3408

client_settings.clear()

2013

# Emit D-Bus signal

2014

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2015

client.name)

3409

2016

3410

2017

atexit.register(cleanup)

3411

2018

3412

for client in tcp_server.clients.values():

2019

for client in tcp_server.clients:

3413

2020

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()

2021

# Emit D-Bus signal

2022

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2023

client.enable()

3419

2024

3420

2025

tcp_server.enable()

3421

2026

tcp_server.server_activate()

3422

2027

3423

2028

# Find out what port we got

3424

if zeroconf:

3425

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

2029

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

3426

2030

if use_ipv6:

3427

2031

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

3428

" flowinfo %d, scope_id %d",

3429

*tcp_server.socket.getsockname())

2032

" flowinfo %d, scope_id %d"

2033

% tcp_server.socket.getsockname())

3430

2034

else: # IPv4

3431

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

3432

*tcp_server.socket.getsockname())

2035

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

2036

% tcp_server.socket.getsockname())

3433

2037

3434

2038

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

3435

2039

3436

2040

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

2041

# From the Avahi example code

2042

try:

2043

service.activate()

2044

except dbus.exceptions.DBusException as error:

2045

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

2046

cleanup()

2047

sys.exit(1)

2048

# End of Avahi example code

3446

2049

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))

2050

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

2051

lambda *args, **kwargs:

2052

(tcp_server.handle_request

2053

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

3451

2054

3452

2055

logger.debug("Starting main loop")

3453

2056

main_loop.run()

3454

2057

except AvahiError as error:

3455

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

2058

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

3456

2059

cleanup()

3457

2060

sys.exit(1)

3458

2061

except KeyboardInterrupt:

3463

2066

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

3464

2067

cleanup()

3465

2068

3466

3467

2069

if __name__ == '__main__':

3468

2070

main()