/mandos/trunk : revision 821

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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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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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import SocketServer as socketserver

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from future_builtins import *

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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import gobject

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try:

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from gi.repository import GObject

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except ImportError:

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import gobject as 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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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.3.1"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.3"

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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 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(":")

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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class AvahiError(Exception):

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

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self.value = value

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

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def __unicode__(self):

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return unicode(repr(self.value))

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

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**kwargs)

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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def rename(self, remove=True):

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

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if self.rename_count >= self.max_renames:

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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

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self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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self.remove()

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if remove:

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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if (error.get_dbus_name()

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

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

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return self.rename(remove=False)

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else:

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

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self.cleanup()

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os._exit(1)

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self .entry_group_state_changed))

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'StateChanged', self.entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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self.rename()

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370

elif state == avahi.ENTRY_GROUP_FAILURE:

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

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unicode(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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str(error))

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

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def cleanup(self):

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

223

377

if self.group is not None:

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378

try:

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379

self.group.Free()

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380

except (dbus.exceptions.UnknownMethodException,

227

dbus.exceptions.DBusException) as e:

381

dbus.exceptions.DBusException):

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pass

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self.group = None

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self.remove()

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

232

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

233

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

234

bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

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avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

389

bad_states = {

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avahi.SERVER_INVALID: "Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION: "Zeroconf server name collision",

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avahi.SERVER_FAILURE: "Zeroconf server failure",

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}

241

395

if state in bad_states:

242

396

if bad_states[state] is not None:

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397

if error is None:

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400

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

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401

self.cleanup()

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402

elif state == avahi.SERVER_RUNNING:

249

self.add()

403

try:

404

self.add()

405

except dbus.exceptions.DBusException as error:

406

if (error.get_dbus_name()

407

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

408

logger.info("Local Zeroconf service name"

409

" collision.")

410

return self.rename(remove=False)

411

else:

412

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

413

self.cleanup()

414

os._exit(1)

250

415

else:

251

416

if error is None:

252

417

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

253

418

else:

254

419

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

420

255

421

def activate(self):

256

422

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

257

423

if self.server is None:

261

427

follow_name_owner_changes=True),

262

428

avahi.DBUS_INTERFACE_SERVER)

263

429

self.server.connect_to_signal("StateChanged",

264

self.server_state_changed)

430

self.server_state_changed)

265

431

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

266

432

267

433

268

def _timedelta_to_milliseconds(td):

269

"Convert a datetime.timedelta() to milliseconds"

270

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

271

+ (td.seconds * 1000)

272

+ (td.microseconds // 1000))

273

434

class AvahiServiceToSyslog(AvahiService):

435

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

436

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

437

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

438

syslogger.setFormatter(logging.Formatter(

439

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

440

.format(self.name)))

441

return ret

442

443

# Pretend that we have a GnuTLS module

444

class GnuTLS(object):

445

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

446

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

447

448

_library = ctypes.cdll.LoadLibrary(

449

ctypes.util.find_library("gnutls"))

450

_need_version = "3.3.0"

451

def __init__(self):

452

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

453

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

454

# happens.

455

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

456

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

457

.format(self._need_version))

458

459

# Unless otherwise indicated, the constants and types below are

460

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

461

462

# Constants

463

E_SUCCESS = 0

464

E_INTERRUPTED = -52

465

E_AGAIN = -28

466

CRT_OPENPGP = 2

467

CLIENT = 2

468

SHUT_RDWR = 0

469

CRD_CERTIFICATE = 1

470

E_NO_CERTIFICATE_FOUND = -49

471

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

472

473

# Types

474

class session_int(ctypes.Structure):

475

_fields_ = []

476

session_t = ctypes.POINTER(session_int)

477

class certificate_credentials_st(ctypes.Structure):

478

_fields_ = []

479

certificate_credentials_t = ctypes.POINTER(

480

certificate_credentials_st)

481

certificate_type_t = ctypes.c_int

482

class datum_t(ctypes.Structure):

483

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

484

('size', ctypes.c_uint)]

485

class openpgp_crt_int(ctypes.Structure):

486

_fields_ = []

487

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

488

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

489

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

490

credentials_type_t = ctypes.c_int #

491

transport_ptr_t = ctypes.c_void_p

492

close_request_t = ctypes.c_int

493

494

# Exceptions

495

class Error(Exception):

496

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

497

# exception might be raised from within GnuTLS.__init__,

498

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

499

# global variable has happened.

500

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

501

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

502

# code is passed, convert it to a string with

503

# gnutls.strerror()

504

self.code = code

505

if message is None and code is not None:

506

message = GnuTLS.strerror(code)

507

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

508

message, *args)

509

510

class CertificateSecurityError(Error):

511

pass

512

513

# Classes

514

class Credentials(object):

515

def __init__(self):

516

self._c_object = gnutls.certificate_credentials_t()

517

gnutls.certificate_allocate_credentials(

518

ctypes.byref(self._c_object))

519

self.type = gnutls.CRD_CERTIFICATE

520

521

def __del__(self):

522

gnutls.certificate_free_credentials(self._c_object)

523

524

class ClientSession(object):

525

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

526

self._c_object = gnutls.session_t()

527

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

528

gnutls.set_default_priority(self._c_object)

529

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

530

gnutls.handshake_set_private_extensions(self._c_object,

531

True)

532

self.socket = socket

533

if credentials is None:

534

credentials = gnutls.Credentials()

535

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

536

ctypes.cast(credentials._c_object,

537

ctypes.c_void_p))

538

self.credentials = credentials

539

540

def __del__(self):

541

gnutls.deinit(self._c_object)

542

543

def handshake(self):

544

return gnutls.handshake(self._c_object)

545

546

def send(self, data):

547

data = bytes(data)

548

data_len = len(data)

549

while data_len > 0:

550

data_len -= gnutls.record_send(self._c_object,

551

data[-data_len:],

552

data_len)

553

554

def bye(self):

555

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

556

557

# Error handling functions

558

def _error_code(result):

559

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

560

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

561

if result >= 0:

562

return result

563

if result == gnutls.E_NO_CERTIFICATE_FOUND:

564

raise gnutls.CertificateSecurityError(code = result)

565

raise gnutls.Error(code = result)

566

567

def _retry_on_error(result, func, arguments):

568

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

569

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

570

while result < 0:

571

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

572

return _error_code(result)

573

result = func(*arguments)

574

return result

575

576

# Unless otherwise indicated, the function declarations below are

577

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

578

579

# Functions

580

priority_set_direct = _library.gnutls_priority_set_direct

581

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

582

ctypes.POINTER(ctypes.c_char_p)]

583

priority_set_direct.restype = _error_code

584

585

init = _library.gnutls_init

586

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

587

init.restype = _error_code

588

589

set_default_priority = _library.gnutls_set_default_priority

590

set_default_priority.argtypes = [session_t]

591

set_default_priority.restype = _error_code

592

593

record_send = _library.gnutls_record_send

594

record_send.argtypes = [session_t, ctypes.c_void_p,

595

ctypes.c_size_t]

596

record_send.restype = ctypes.c_ssize_t

597

record_send.errcheck = _retry_on_error

598

599

certificate_allocate_credentials = (

600

_library.gnutls_certificate_allocate_credentials)

601

certificate_allocate_credentials.argtypes = [

602

ctypes.POINTER(certificate_credentials_t)]

603

certificate_allocate_credentials.restype = _error_code

604

605

certificate_free_credentials = (

606

_library.gnutls_certificate_free_credentials)

607

certificate_free_credentials.argtypes = [certificate_credentials_t]

608

certificate_free_credentials.restype = None

609

610

handshake_set_private_extensions = (

611

_library.gnutls_handshake_set_private_extensions)

612

handshake_set_private_extensions.argtypes = [session_t,

613

ctypes.c_int]

614

handshake_set_private_extensions.restype = None

615

616

credentials_set = _library.gnutls_credentials_set

617

credentials_set.argtypes = [session_t, credentials_type_t,

618

ctypes.c_void_p]

619

credentials_set.restype = _error_code

620

621

strerror = _library.gnutls_strerror

622

strerror.argtypes = [ctypes.c_int]

623

strerror.restype = ctypes.c_char_p

624

625

certificate_type_get = _library.gnutls_certificate_type_get

626

certificate_type_get.argtypes = [session_t]

627

certificate_type_get.restype = _error_code

628

629

certificate_get_peers = _library.gnutls_certificate_get_peers

630

certificate_get_peers.argtypes = [session_t,

631

ctypes.POINTER(ctypes.c_uint)]

632

certificate_get_peers.restype = ctypes.POINTER(datum_t)

633

634

global_set_log_level = _library.gnutls_global_set_log_level

635

global_set_log_level.argtypes = [ctypes.c_int]

636

global_set_log_level.restype = None

637

638

global_set_log_function = _library.gnutls_global_set_log_function

639

global_set_log_function.argtypes = [log_func]

640

global_set_log_function.restype = None

641

642

deinit = _library.gnutls_deinit

643

deinit.argtypes = [session_t]

644

deinit.restype = None

645

646

handshake = _library.gnutls_handshake

647

handshake.argtypes = [session_t]

648

handshake.restype = _error_code

649

handshake.errcheck = _retry_on_error

650

651

transport_set_ptr = _library.gnutls_transport_set_ptr

652

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

653

transport_set_ptr.restype = None

654

655

bye = _library.gnutls_bye

656

bye.argtypes = [session_t, close_request_t]

657

bye.restype = _error_code

658

bye.errcheck = _retry_on_error

659

660

check_version = _library.gnutls_check_version

661

check_version.argtypes = [ctypes.c_char_p]

662

check_version.restype = ctypes.c_char_p

663

664

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

665

666

openpgp_crt_init = _library.gnutls_openpgp_crt_init

667

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

668

openpgp_crt_init.restype = _error_code

669

670

openpgp_crt_import = _library.gnutls_openpgp_crt_import

671

openpgp_crt_import.argtypes = [openpgp_crt_t,

672

ctypes.POINTER(datum_t),

673

openpgp_crt_fmt_t]

674

openpgp_crt_import.restype = _error_code

675

676

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

677

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

678

ctypes.POINTER(ctypes.c_uint)]

679

openpgp_crt_verify_self.restype = _error_code

680

681

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

682

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

683

openpgp_crt_deinit.restype = None

684

685

openpgp_crt_get_fingerprint = (

686

_library.gnutls_openpgp_crt_get_fingerprint)

687

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

688

ctypes.c_void_p,

689

ctypes.POINTER(

690

ctypes.c_size_t)]

691

openpgp_crt_get_fingerprint.restype = _error_code

692

693

# Remove non-public functions

694

del _error_code, _retry_on_error

695

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

696

gnutls = GnuTLS()

697

698

def call_pipe(connection, # : multiprocessing.Connection

699

func, *args, **kwargs):

700

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

701

702

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

703

return value on the provided multiprocessing.Connection.

704

"""

705

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

706

connection.close()

707

274

708

class Client(object):

275

709

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

276

710

277

711

Attributes:

278

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

712

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

279

713

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

280

714

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

281

715

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

282

716

to see if the client lives.

283

717

'None' if no process is running.

284

checker_callback_tag: a gobject event source tag, or None

718

checker_callback_tag: a GObject event source tag, or None

285

719

checker_command: string; External command which is run to check

286

720

if client lives. %() expansions are done at

287

721

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

288

722

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

289

checker_initiator_tag: a gobject event source tag, or None

723

checker_initiator_tag: a GObject event source tag, or None

290

724

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

725

client_structure: Object describing what attributes a client has

726

and is used for storing the client at exit

291

727

current_checker_command: string; current running checker_command

292

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

293

disable_initiator_tag: a gobject event source tag, or None

728

disable_initiator_tag: a GObject event source tag, or None

294

729

enabled: bool()

295

730

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

296

731

uniquely identify the client

298

733

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

299

734

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

300

735

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

301

last_enabled: datetime.datetime(); (UTC)

736

last_checker_status: integer between 0 and 255 reflecting exit

737

status of last checker. -1 reflects crashed

738

checker, -2 means no checker completed yet.

739

last_checker_signal: The signal which killed the last checker, if

740

last_checker_status is -1

741

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

302

742

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

303

743

D-Bus identifiers

304

744

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

305

745

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

306

746

until this client is disabled

307

extended_timeout: extra long timeout when password has been sent

747

extended_timeout: extra long timeout when secret has been sent

308

748

runtime_expansions: Allowed attributes for runtime expansion.

309

749

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

310

750

disabled, or None

751

server_settings: The server_settings dict from main()

311

752

"""

312

753

313

754

runtime_expansions = ("approval_delay", "approval_duration",

314

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

315

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

755

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

756

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

757

"last_approval_request", "last_checked_ok",

316

758

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

317

318

def timeout_milliseconds(self):

319

"Return the 'timeout' attribute in milliseconds"

320

return _timedelta_to_milliseconds(self.timeout)

321

322

def extended_timeout_milliseconds(self):

323

"Return the 'extended_timeout' attribute in milliseconds"

324

return _timedelta_to_milliseconds(self.extended_timeout)

325

326

def interval_milliseconds(self):

327

"Return the 'interval' attribute in milliseconds"

328

return _timedelta_to_milliseconds(self.interval)

329

330

def approval_delay_milliseconds(self):

331

return _timedelta_to_milliseconds(self.approval_delay)

332

333

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

334

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

335

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

336

attribute."""

759

client_defaults = {

760

"timeout": "PT5M",

761

"extended_timeout": "PT15M",

762

"interval": "PT2M",

763

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

764

"host": "",

765

"approval_delay": "PT0S",

766

"approval_duration": "PT1S",

767

"approved_by_default": "True",

768

"enabled": "True",

769

}

770

771

@staticmethod

772

def config_parser(config):

773

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

774

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

775

with exceptions for any special settings as defined above.

776

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

777

value given the same arguments.

778

"""

779

settings = {}

780

for client_name in config.sections():

781

section = dict(config.items(client_name))

782

client = settings[client_name] = {}

783

784

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

785

# Reformat values from string types to Python types

786

client["approved_by_default"] = config.getboolean(

787

client_name, "approved_by_default")

788

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

789

"enabled")

790

791

# Uppercase and remove spaces from fingerprint for later

792

# comparison purposes with return value from the

793

# fingerprint() function

794

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

795

.replace(" ", ""))

796

if "secret" in section:

797

client["secret"] = section["secret"].decode("base64")

798

elif "secfile" in section:

799

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

800

(section["secfile"])),

801

"rb") as secfile:

802

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

803

else:

804

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

805

.format(section))

806

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

807

client["extended_timeout"] = string_to_delta(

808

section["extended_timeout"])

809

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

810

client["approval_delay"] = string_to_delta(

811

section["approval_delay"])

812

client["approval_duration"] = string_to_delta(

813

section["approval_duration"])

814

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

815

client["last_approval_request"] = None

816

client["last_checked_ok"] = None

817

client["last_checker_status"] = -2

818

819

return settings

820

821

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

337

822

self.name = name

338

if config is None:

339

config = {}

823

if server_settings is None:

824

server_settings = {}

825

self.server_settings = server_settings

826

# adding all client settings

827

for setting, value in settings.items():

828

setattr(self, setting, value)

829

830

if self.enabled:

831

if not hasattr(self, "last_enabled"):

832

self.last_enabled = datetime.datetime.utcnow()

833

if not hasattr(self, "expires"):

834

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

835

+ self.timeout)

836

else:

837

self.last_enabled = None

838

self.expires = None

839

340

840

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

341

# Uppercase and remove spaces from fingerprint for later

342

# comparison purposes with return value from the fingerprint()

343

# function

344

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

345

.replace(" ", ""))

346

841

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

347

if "secret" in config:

348

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

349

elif "secfile" in config:

350

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

351

(config["secfile"])),

352

"rb") as secfile:

353

self.secret = secfile.read()

354

else:

355

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

356

% self.name)

357

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

358

self.created = datetime.datetime.utcnow()

359

self.enabled = False

360

self.last_approval_request = None

361

self.last_enabled = None

362

self.last_checked_ok = None

363

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

364

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

365

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

366

self.disable_hook = disable_hook

842

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

843

datetime.datetime.utcnow())

844

845

# attributes specific for this server instance

367

846

self.checker = None

368

847

self.checker_initiator_tag = None

369

848

self.disable_initiator_tag = None

370

self.expires = None

371

849

self.checker_callback_tag = None

372

self.checker_command = config["checker"]

373

850

self.current_checker_command = None

374

self.last_connect = None

375

self._approved = None

376

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

377

True)

851

self.approved = None

378

852

self.approvals_pending = 0

379

self.approval_delay = string_to_delta(

380

config["approval_delay"])

381

self.approval_duration = string_to_delta(

382

config["approval_duration"])

383

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

853

self.changedstate = multiprocessing_manager.Condition(

854

multiprocessing_manager.Lock())

855

self.client_structure = [attr

856

for attr in self.__dict__.iterkeys()

857

if not attr.startswith("_")]

858

self.client_structure.append("client_structure")

859

860

for name, t in inspect.getmembers(

861

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

862

if not name.startswith("_"):

863

self.client_structure.append(name)

384

864

865

# Send notice to process children that client state has changed

385

866

def send_changedstate(self):

386

self.changedstate.acquire()

387

self.changedstate.notify_all()

388

self.changedstate.release()

389

867

with self.changedstate:

868

self.changedstate.notify_all()

869

390

870

def enable(self):

391

871

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

392

872

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

393

873

# Already enabled

394

874

return

395

self.send_changedstate()

396

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

397

# and every interval from then on.

398

self.checker_initiator_tag = (gobject.timeout_add

399

(self.interval_milliseconds(),

400

self.start_checker))

401

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

402

875

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

403

self.disable_initiator_tag = (gobject.timeout_add

404

(self.timeout_milliseconds(),

405

self.disable))

406

876

self.enabled = True

407

877

self.last_enabled = datetime.datetime.utcnow()

408

# Also start a new checker *right now*.

409

self.start_checker()

878

self.init_checker()

879

self.send_changedstate()

410

880

411

881

def disable(self, quiet=True):

412

882

"""Disable this client."""

413

883

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

414

884

return False

415

885

if not quiet:

416

self.send_changedstate()

417

if not quiet:

418

886

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

419

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

420

gobject.source_remove(self.disable_initiator_tag)

887

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

888

GObject.source_remove(self.disable_initiator_tag)

421

889

self.disable_initiator_tag = None

422

890

self.expires = None

423

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

424

gobject.source_remove(self.checker_initiator_tag)

891

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

892

GObject.source_remove(self.checker_initiator_tag)

425

893

self.checker_initiator_tag = None

426

894

self.stop_checker()

427

if self.disable_hook:

428

self.disable_hook(self)

429

895

self.enabled = False

430

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

896

if not quiet:

897

self.send_changedstate()

898

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

431

899

return False

432

900

433

901

def __del__(self):

434

self.disable_hook = None

435

902

self.disable()

436

903

437

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

904

def init_checker(self):

905

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

906

# and every interval from then on.

907

if self.checker_initiator_tag is not None:

908

GObject.source_remove(self.checker_initiator_tag)

909

self.checker_initiator_tag = GObject.timeout_add(

910

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

911

self.start_checker)

912

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

913

if self.disable_initiator_tag is not None:

914

GObject.source_remove(self.disable_initiator_tag)

915

self.disable_initiator_tag = GObject.timeout_add(

916

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

917

# Also start a new checker *right now*.

918

self.start_checker()

919

920

def checker_callback(self, source, condition, connection,

921

command):

438

922

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

439

923

self.checker_callback_tag = None

440

924

self.checker = None

441

if os.WIFEXITED(condition):

442

exitstatus = os.WEXITSTATUS(condition)

443

if exitstatus == 0:

925

# Read return code from connection (see call_pipe)

926

returncode = connection.recv()

927

connection.close()

928

929

if returncode >= 0:

930

self.last_checker_status = returncode

931

self.last_checker_signal = None

932

if self.last_checker_status == 0:

444

933

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

445

934

vars(self))

446

935

self.checked_ok()

447

936

else:

448

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

449

vars(self))

937

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

450

938

else:

939

self.last_checker_status = -1

940

self.last_checker_signal = -returncode

451

941

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

452

942

vars(self))

453

454

def checked_ok(self, timeout=None):

455

"""Bump up the timeout for this client.

456

457

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

458

alive and well.

459

"""

943

return False

944

945

def checked_ok(self):

946

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

947

self.last_checked_ok = datetime.datetime.utcnow()

948

self.last_checker_status = 0

949

self.last_checker_signal = None

950

self.bump_timeout()

951

952

def bump_timeout(self, timeout=None):

953

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

460

954

if timeout is None:

461

955

timeout = self.timeout

462

self.last_checked_ok = datetime.datetime.utcnow()

463

gobject.source_remove(self.disable_initiator_tag)

464

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

465

self.disable_initiator_tag = (gobject.timeout_add

466

(_timedelta_to_milliseconds(timeout),

467

self.disable))

956

if self.disable_initiator_tag is not None:

957

GObject.source_remove(self.disable_initiator_tag)

958

self.disable_initiator_tag = None

959

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

960

self.disable_initiator_tag = GObject.timeout_add(

961

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

962

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

468

963

469

964

def need_approval(self):

470

965

self.last_approval_request = datetime.datetime.utcnow()

475

970

If a checker already exists, leave it running and do

476

971

nothing."""

477

972

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

478

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

479

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

480

# client would inevitably timeout, since no checker would get

481

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

973

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

974

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

975

# would inevitably timeout, since no checker would get a

976

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

482

977

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

483

978

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

484

979

# should be.

485

980

486

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

487

try:

488

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

489

except (AttributeError, OSError) as error:

490

if (isinstance(error, OSError)

491

and error.errno != errno.ECHILD):

492

raise error

493

else:

494

if pid:

495

logger.warning("Checker was a zombie")

496

gobject.source_remove(self.checker_callback_tag)

497

self.checker_callback(pid, status,

498

self.current_checker_command)

981

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

982

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

983

self.checker.join()

984

self.checker = None

499

985

# Start a new checker if needed

500

986

if self.checker is None:

987

# Escape attributes for the shell

988

escaped_attrs = {

989

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

990

for attr in self.runtime_expansions }

501

991

try:

502

# In case checker_command has exactly one % operator

503

command = self.checker_command % self.host

504

except TypeError:

505

# Escape attributes for the shell

506

escaped_attrs = dict(

507

(attr,

508

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

509

errors=

510

'replace')))

511

for attr in

512

self.runtime_expansions)

513

514

try:

515

command = self.checker_command % escaped_attrs

516

except TypeError as error:

517

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

518

' %s', self.checker_command, error)

519

return True # Try again later

992

command = self.checker_command % escaped_attrs

993

except TypeError as error:

994

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

995

self.checker_command,

996

exc_info=error)

997

return True # Try again later

520

998

self.current_checker_command = command

521

try:

522

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

523

command, self.name)

524

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

525

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

526

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

527

# always replaced by /dev/null.)

528

self.checker = subprocess.Popen(command,

529

close_fds=True,

530

shell=True, cwd="/")

531

self.checker_callback_tag = (gobject.child_watch_add

532

(self.checker.pid,

533

self.checker_callback,

534

data=command))

535

# The checker may have completed before the gobject

536

# watch was added. Check for this.

537

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

538

if pid:

539

gobject.source_remove(self.checker_callback_tag)

540

self.checker_callback(pid, status, command)

541

except OSError as error:

542

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

543

error)

544

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

999

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

1000

self.name)

1001

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

1002

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

1003

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

1004

# always replaced by /dev/null.)

1005

# The exception is when not debugging but nevertheless

1006

# running in the foreground; use the previously

1007

# created wnull.

1008

popen_args = { "close_fds": True,

1009

"shell": True,

1010

"cwd": "/" }

1011

if (not self.server_settings["debug"]

1012

and self.server_settings["foreground"]):

1013

popen_args.update({"stdout": wnull,

1014

"stderr": wnull })

1015

pipe = multiprocessing.Pipe(duplex = False)

1016

self.checker = multiprocessing.Process(

1017

target = call_pipe,

1018

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

1019

kwargs = popen_args)

1020

self.checker.start()

1021

self.checker_callback_tag = GObject.io_add_watch(

1022

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

1023

self.checker_callback, pipe[0], command)

1024

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

545

1025

return True

546

1026

547

1027

def stop_checker(self):

548

1028

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

549

1029

if self.checker_callback_tag:

550

gobject.source_remove(self.checker_callback_tag)

1030

GObject.source_remove(self.checker_callback_tag)

551

1031

self.checker_callback_tag = None

552

1032

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

553

1033

return

554

1034

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

555

try:

556

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

557

#time.sleep(0.5)

558

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

559

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

560

except OSError as error:

561

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

562

raise

1035

self.checker.terminate()

563

1036

self.checker = None

564

1037

565

1038

566

def dbus_service_property(dbus_interface, signature="v",

567

access="readwrite", byte_arrays=False):

1039

def dbus_service_property(dbus_interface,

1040

signature="v",

1041

access="readwrite",

1042

byte_arrays=False):

568

1043

"""Decorators for marking methods of a DBusObjectWithProperties to

569

1044

become properties on the D-Bus.

570

1045

579

1054

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

580

1055

if byte_arrays and signature != "ay":

581

1056

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

582

" signature %r" % signature)

1057

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

1058

583

1059

def decorator(func):

584

1060

func._dbus_is_property = True

585

1061

func._dbus_interface = dbus_interface

590

1066

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

591

1067

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

592

1068

return func

1069

1070

return decorator

1071

1072

1073

def dbus_interface_annotations(dbus_interface):

1074

"""Decorator for marking functions returning interface annotations

1075

1076

Usage:

1077

1078

@dbus_interface_annotations("org.example.Interface")

1079

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

1080

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

1081

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

1082

"false"}

1083

"""

1084

1085

def decorator(func):

1086

func._dbus_is_interface = True

1087

func._dbus_interface = dbus_interface

1088

func._dbus_name = dbus_interface

1089

return func

1090

1091

return decorator

1092

1093

1094

def dbus_annotations(annotations):

1095

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

1096

Usage:

1097

1098

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

1099

"org.freedesktop.DBus.Property."

1100

"EmitsChangedSignal": "false"})

1101

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

1102

access="r")

1103

def Property_dbus_property(self):

1104

return dbus.Boolean(False)

1105

1106

See also the DBusObjectWithAnnotations class.

1107

"""

1108

1109

def decorator(func):

1110

func._dbus_annotations = annotations

1111

return func

1112

593

1113

return decorator

594

1114

595

1115

596

1116

class DBusPropertyException(dbus.exceptions.DBusException):

597

1117

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

598

1118

"""

599

def __unicode__(self):

600

return unicode(str(self))

1119

pass

601

1120

602

1121

603

1122

class DBusPropertyAccessException(DBusPropertyException):

612

1131

pass

613

1132

614

1133

615

class DBusObjectWithProperties(dbus.service.Object):

1134

class DBusObjectWithAnnotations(dbus.service.Object):

1135

"""A D-Bus object with annotations.

1136

1137

Classes inheriting from this can use the dbus_annotations

1138

decorator to add annotations to methods or signals.

1139

"""

1140

1141

@staticmethod

1142

def _is_dbus_thing(thing):

1143

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

1144

1145

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

1146

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

1147

"""

1148

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

1149

False)

1150

1151

def _get_all_dbus_things(self, thing):

1152

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

1153

"""

1154

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

1155

athing.__get__(self))

1156

for cls in self.__class__.__mro__

1157

for name, athing in

1158

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

1159

1160

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1161

out_signature = "s",

1162

path_keyword = 'object_path',

1163

connection_keyword = 'connection')

1164

def Introspect(self, object_path, connection):

1165

"""Overloading of standard D-Bus method.

1166

1167

Inserts annotation tags on methods and signals.

1168

"""

1169

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

1170

connection)

1171

try:

1172

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

1173

1174

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

1175

# Add annotation tags

1176

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

1177

for tag in if_tag.getElementsByTagName(typ):

1178

annots = dict()

1179

for name, prop in (self.

1180

_get_all_dbus_things(typ)):

1181

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

1182

and prop._dbus_interface

1183

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

1184

annots.update(getattr(

1185

prop, "_dbus_annotations", {}))

1186

for name, value in annots.items():

1187

ann_tag = document.createElement(

1188

"annotation")

1189

ann_tag.setAttribute("name", name)

1190

ann_tag.setAttribute("value", value)

1191

tag.appendChild(ann_tag)

1192

# Add interface annotation tags

1193

for annotation, value in dict(

1194

itertools.chain.from_iterable(

1195

annotations().items()

1196

for name, annotations

1197

in self._get_all_dbus_things("interface")

1198

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

1199

)).items():

1200

ann_tag = document.createElement("annotation")

1201

ann_tag.setAttribute("name", annotation)

1202

ann_tag.setAttribute("value", value)

1203

if_tag.appendChild(ann_tag)

1204

# Fix argument name for the Introspect method itself

1205

if (if_tag.getAttribute("name")

1206

== dbus.INTROSPECTABLE_IFACE):

1207

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

1208

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

1209

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

1210

if (arg.getAttribute("direction")

1211

== "out"):

1212

arg.setAttribute("name",

1213

"xml_data")

1214

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

1215

document.unlink()

1216

except (AttributeError, xml.dom.DOMException,

1217

xml.parsers.expat.ExpatError) as error:

1218

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

1219

exc_info=error)

1220

return xmlstring

1221

1222

1223

class DBusObjectWithProperties(DBusObjectWithAnnotations):

616

1224

"""A D-Bus object with properties.

617

1225

618

1226

Classes inheriting from this can use the dbus_service_property

620

1228

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

621

1229

"""

622

1230

623

@staticmethod

624

def _is_dbus_property(obj):

625

return getattr(obj, "_dbus_is_property", False)

626

627

def _get_all_dbus_properties(self):

628

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

629

"""

630

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

631

for cls in self.__class__.__mro__

632

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

633

634

1231

def _get_dbus_property(self, interface_name, property_name):

635

1232

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

636

1233

property with the specified name and interface.

637

1234

"""

638

for cls in self.__class__.__mro__:

639

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

640

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

1235

for cls in self.__class__.__mro__:

1236

for name, value in inspect.getmembers(

1237

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

1238

if (value._dbus_name == property_name

1239

and value._dbus_interface == interface_name):

641

1240

return value.__get__(self)

642

1241

643

1242

# No such property

644

raise DBusPropertyNotFound(self.dbus_object_path + ":"

645

+ interface_name + "."

646

+ property_name)

647

648

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

1243

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

1244

self.dbus_object_path, interface_name, property_name))

1245

1246

@classmethod

1247

def _get_all_interface_names(cls):

1248

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

1249

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

1250

"_dbus_interface", None)

1251

for x in (inspect.getmro(cls))

1252

for attr in dir(x))

1253

if name is not None)

1254

1255

@dbus.service.method(dbus.PROPERTIES_IFACE,

1256

in_signature="ss",

649

1257

out_signature="v")

650

1258

def Get(self, interface_name, property_name):

651

1259

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

669

1277

# The byte_arrays option is not supported yet on

670

1278

# signatures other than "ay".

671

1279

if prop._dbus_signature != "ay":

672

raise ValueError

673

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

674

for byte in value))

1280

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

1281

"'ay' signature {!r}"

1282

.format(prop._dbus_signature))

1283

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

1284

for byte in value))

675

1285

prop(value)

676

1286

677

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

1287

@dbus.service.method(dbus.PROPERTIES_IFACE,

1288

in_signature="s",

678

1289

out_signature="a{sv}")

679

1290

def GetAll(self, interface_name):

680

1291

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

682

1293

683

1294

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

684

1295

"""

685

all = {}

686

for name, prop in self._get_all_dbus_properties():

1296

properties = {}

1297

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

687

1298

if (interface_name

688

1299

and interface_name != prop._dbus_interface):

689

1300

# Interface non-empty but did not match

693

1304

continue

694

1305

value = prop()

695

1306

if not hasattr(value, "variant_level"):

696

all[name] = value

1307

properties[name] = value

697

1308

continue

698

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

699

value.variant_level+1)

700

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

1309

properties[name] = type(value)(

1310

value, variant_level = value.variant_level + 1)

1311

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

1312

1313

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

1314

def PropertiesChanged(self, interface_name, changed_properties,

1315

invalidated_properties):

1316

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

1317

standard.

1318

"""

1319

pass

701

1320

702

1321

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

703

1322

out_signature="s",

704

1323

path_keyword='object_path',

705

1324

connection_keyword='connection')

706

1325

def Introspect(self, object_path, connection):

707

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

1326

"""Overloading of standard D-Bus method.

1327

1328

Inserts property tags and interface annotation tags.

708

1329

"""

709

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

710

connection)

1330

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1331

object_path,

1332

connection)

711

1333

try:

712

1334

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

1335

713

1336

def make_tag(document, name, prop):

714

1337

e = document.createElement("property")

715

1338

e.setAttribute("name", name)

716

1339

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

717

1340

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

718

1341

return e

1342

719

1343

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

1344

# Add property tags

720

1345

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

721

1346

for name, prop

722

in self._get_all_dbus_properties()

1347

in self._get_all_dbus_things("property")

723

1348

if prop._dbus_interface

724

1349

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

725

1350

if_tag.appendChild(tag)

1351

# Add annotation tags for properties

1352

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

1353

annots = dict()

1354

for name, prop in self._get_all_dbus_things(

1355

"property"):

1356

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

1357

and prop._dbus_interface

1358

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

1359

annots.update(getattr(

1360

prop, "_dbus_annotations", {}))

1361

for name, value in annots.items():

1362

ann_tag = document.createElement(

1363

"annotation")

1364

ann_tag.setAttribute("name", name)

1365

ann_tag.setAttribute("value", value)

1366

tag.appendChild(ann_tag)

726

1367

# Add the names to the return values for the

727

1368

# "org.freedesktop.DBus.Properties" methods

728

1369

if (if_tag.getAttribute("name")

743

1384

except (AttributeError, xml.dom.DOMException,

744

1385

xml.parsers.expat.ExpatError) as error:

745

1386

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

746

error)

747

return xmlstring

748

749

750

def datetime_to_dbus (dt, variant_level=0):

1387

exc_info=error)

1388

return xmlstring

1389

1390

try:

1391

dbus.OBJECT_MANAGER_IFACE

1392

except AttributeError:

1393

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

1394

1395

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1396

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

1397

1398

Classes inheriting from this exposes the standard

1399

GetManagedObjects call and the InterfacesAdded and

1400

InterfacesRemoved signals on the standard

1401

"org.freedesktop.DBus.ObjectManager" interface.

1402

1403

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

1404

manually.

1405

"""

1406

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1407

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

1408

def GetManagedObjects(self):

1409

"""This function must be overridden"""

1410

raise NotImplementedError()

1411

1412

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1413

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

1414

def InterfacesAdded(self, object_path, interfaces_and_properties):

1415

pass

1416

1417

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

1418

def InterfacesRemoved(self, object_path, interfaces):

1419

pass

1420

1421

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1422

out_signature = "s",

1423

path_keyword = 'object_path',

1424

connection_keyword = 'connection')

1425

def Introspect(self, object_path, connection):

1426

"""Overloading of standard D-Bus method.

1427

1428

Override return argument name of GetManagedObjects to be

1429

"objpath_interfaces_and_properties"

1430

"""

1431

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1432

object_path,

1433

connection)

1434

try:

1435

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

1436

1437

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

1438

# Fix argument name for the GetManagedObjects method

1439

if (if_tag.getAttribute("name")

1440

== dbus.OBJECT_MANAGER_IFACE):

1441

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

1442

if (cn.getAttribute("name")

1443

== "GetManagedObjects"):

1444

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

1445

if (arg.getAttribute("direction")

1446

== "out"):

1447

arg.setAttribute(

1448

"name",

1449

"objpath_interfaces"

1450

"_and_properties")

1451

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

1452

document.unlink()

1453

except (AttributeError, xml.dom.DOMException,

1454

xml.parsers.expat.ExpatError) as error:

1455

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

1456

exc_info = error)

1457

return xmlstring

1458

1459

def datetime_to_dbus(dt, variant_level=0):

751

1460

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

752

1461

if dt is None:

753

1462

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

754

return dbus.String(dt.isoformat(),

755

variant_level=variant_level)

756

757

class AlternateDBusNamesMetaclass(DBusObjectWithProperties.__metaclass__):

758

"""Applied to an empty subclass of a D-Bus object, this metaclass

759

will add additional D-Bus attributes matching a certain pattern.

1463

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

1464

1465

1466

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1467

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

1468

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

1469

interface names according to the "alt_interface_names" mapping.

1470

Usage:

1471

1472

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

1473

"net.example.AlternateInterface"})

1474

class SampleDBusObject(dbus.service.Object):

1475

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

1476

def SampleDBusMethod():

1477

pass

1478

1479

The above "SampleDBusMethod" on "SampleDBusObject" will be

1480

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

1481

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

1482

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

1483

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

1484

1485

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

1486

(from DBusObjectWithProperties) and interfaces (from the

1487

dbus_interface_annotations decorator).

760

1488

"""

761

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

762

# Go through all the base classes which could have D-Bus

763

# methods, signals, or properties in them

764

for base in (b for b in bases

765

if issubclass(b, dbus.service.Object)):

766

# Go though all attributes of the base class

767

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

1489

1490

def wrapper(cls):

1491

for orig_interface_name, alt_interface_name in (

1492

alt_interface_names.items()):

1493

attr = {}

1494

interface_names = set()

1495

# Go though all attributes of the class

1496

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

768

1497

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

769

1498

# with the wrong interface name

770

1499

if (not hasattr(attribute, "_dbus_interface")

771

or not attribute._dbus_interface

772

.startswith("se.recompile.Mandos")):

1500

or not attribute._dbus_interface.startswith(

1501

orig_interface_name)):

773

1502

continue

774

1503

# Create an alternate D-Bus interface name based on

775

1504

# the current name

776

alt_interface = (attribute._dbus_interface

777

.replace("se.recompile.Mandos",

778

"se.bsnet.fukt.Mandos"))

1505

alt_interface = attribute._dbus_interface.replace(

1506

orig_interface_name, alt_interface_name)

1507

interface_names.add(alt_interface)

779

1508

# Is this a D-Bus signal?

780

1509

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

781

# Extract the original non-method function by

782

# black magic

783

nonmethod_func = (dict(

1510

if sys.version_info.major == 2:

1511

# Extract the original non-method undecorated

1512

# function by black magic

1513

nonmethod_func = (dict(

784

1514

zip(attribute.func_code.co_freevars,

785

attribute.__closure__))["func"]

786

.cell_contents)

1515

attribute.__closure__))

1516

["func"].cell_contents)

1517

else:

1518

nonmethod_func = attribute

787

1519

# Create a new, but exactly alike, function

788

1520

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

789

1521

# with the alternate D-Bus interface name

790

new_function = (dbus.service.signal

791

(alt_interface,

792

attribute._dbus_signature)

793

(types.FunctionType(

794

nonmethod_func.func_code,

795

nonmethod_func.func_globals,

796

nonmethod_func.func_name,

797

nonmethod_func.func_defaults,

798

nonmethod_func.func_closure)))

1522

if sys.version_info.major == 2:

1523

new_function = types.FunctionType(

1524

nonmethod_func.func_code,

1525

nonmethod_func.func_globals,

1526

nonmethod_func.func_name,

1527

nonmethod_func.func_defaults,

1528

nonmethod_func.func_closure)

1529

else:

1530

new_function = types.FunctionType(

1531

nonmethod_func.__code__,

1532

nonmethod_func.__globals__,

1533

nonmethod_func.__name__,

1534

nonmethod_func.__defaults__,

1535

nonmethod_func.__closure__)

1536

new_function = (dbus.service.signal(

1537

alt_interface,

1538

attribute._dbus_signature)(new_function))

1539

# Copy annotations, if any

1540

try:

1541

new_function._dbus_annotations = dict(

1542

attribute._dbus_annotations)

1543

except AttributeError:

1544

pass

799

1545

# Define a creator of a function to call both the

800

# old and new functions, so both the old and new

801

# signals gets sent when the function is called

1546

# original and alternate functions, so both the

1547

# original and alternate signals gets sent when

1548

# the function is called

802

1549

def fixscope(func1, func2):

803

1550

"""This function is a scope container to pass

804

1551

func1 and func2 to the "call_both" function

805

1552

outside of its arguments"""

1553

1554

@functools.wraps(func2)

806

1555

def call_both(*args, **kwargs):

807

1556

"""This function will emit two D-Bus

808

1557

signals by calling func1 and func2"""

809

1558

func1(*args, **kwargs)

810

1559

func2(*args, **kwargs)

1560

# Make wrapper function look like a D-Bus signal

1561

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

1562

if name.startswith("_dbus_"):

1563

setattr(call_both, name, attr)

1564

811

1565

return call_both

812

1566

# Create the "call_both" function and add it to

813

1567

# the class

814

attr[attrname] = fixscope(attribute,

815

new_function)

1568

attr[attrname] = fixscope(attribute, new_function)

816

1569

# Is this a D-Bus method?

817

1570

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

818

1571

# Create a new, but exactly alike, function

819

1572

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

820

1573

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

821

1574

# to the class.

822

attr[attrname] = (dbus.service.method

823

(alt_interface,

824

attribute._dbus_in_signature,

825

attribute._dbus_out_signature)

826

(types.FunctionType

827

(attribute.func_code,

828

attribute.func_globals,

829

attribute.func_name,

830

attribute.func_defaults,

831

attribute.func_closure)))

1575

attr[attrname] = (

1576

dbus.service.method(

1577

alt_interface,

1578

attribute._dbus_in_signature,

1579

attribute._dbus_out_signature)

1580

(types.FunctionType(attribute.func_code,

1581

attribute.func_globals,

1582

attribute.func_name,

1583

attribute.func_defaults,

1584

attribute.func_closure)))

1585

# Copy annotations, if any

1586

try:

1587

attr[attrname]._dbus_annotations = dict(

1588

attribute._dbus_annotations)

1589

except AttributeError:

1590

pass

832

1591

# Is this a D-Bus property?

833

1592

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

834

1593

# Create a new, but exactly alike, function

835

1594

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

836

1595

# property with the alternate D-Bus interface

837

1596

# name. Add it to the class.

838

attr[attrname] = (dbus_service_property

839

(alt_interface,

840

attribute._dbus_signature,

841

attribute._dbus_access,

842

attribute

843

._dbus_get_args_options

844

["byte_arrays"])

845

(types.FunctionType

846

(attribute.func_code,

847

attribute.func_globals,

848

attribute.func_name,

849

attribute.func_defaults,

850

attribute.func_closure)))

851

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

852

1597

attr[attrname] = (dbus_service_property(

1598

alt_interface, attribute._dbus_signature,

1599

attribute._dbus_access,

1600

attribute._dbus_get_args_options

1601

["byte_arrays"])

1602

(types.FunctionType(

1603

attribute.func_code,

1604

attribute.func_globals,

1605

attribute.func_name,

1606

attribute.func_defaults,

1607

attribute.func_closure)))

1608

# Copy annotations, if any

1609

try:

1610

attr[attrname]._dbus_annotations = dict(

1611

attribute._dbus_annotations)

1612

except AttributeError:

1613

pass

1614

# Is this a D-Bus interface?

1615

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

1616

# Create a new, but exactly alike, function

1617

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

1618

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

1619

# to the class.

1620

attr[attrname] = (

1621

dbus_interface_annotations(alt_interface)

1622

(types.FunctionType(attribute.func_code,

1623

attribute.func_globals,

1624

attribute.func_name,

1625

attribute.func_defaults,

1626

attribute.func_closure)))

1627

if deprecate:

1628

# Deprecate all alternate interfaces

1629

iname="_AlternateDBusNames_interface_annotation{}"

1630

for interface_name in interface_names:

1631

1632

@dbus_interface_annotations(interface_name)

1633

def func(self):

1634

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

1635

"true" }

1636

# Find an unused name

1637

for aname in (iname.format(i)

1638

for i in itertools.count()):

1639

if aname not in attr:

1640

attr[aname] = func

1641

break

1642

if interface_names:

1643

# Replace the class with a new subclass of it with

1644

# methods, signals, etc. as created above.

1645

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

1646

(cls, ), attr)

1647

return cls

1648

1649

return wrapper

1650

1651

1652

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

1653

"se.bsnet.fukt.Mandos"})

853

1654

class ClientDBus(Client, DBusObjectWithProperties):

854

1655

"""A Client class using D-Bus

855

1656

859

1660

"""

860

1661

861

1662

runtime_expansions = (Client.runtime_expansions

862

+ ("dbus_object_path",))

1663

+ ("dbus_object_path", ))

1664

1665

_interface = "se.recompile.Mandos.Client"

863

1666

864

1667

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

865

1668

866

1669

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

867

self._approvals_pending = 0

868

1670

self.bus = bus

869

1671

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

870

1672

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

871

1673

# the D-Bus

872

client_object_name = unicode(self.name).translate(

1674

client_object_name = str(self.name).translate(

873

1675

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

874

1676

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

875

self.dbus_object_path = (dbus.ObjectPath

876

("/clients/" + client_object_name))

1677

self.dbus_object_path = dbus.ObjectPath(

1678

"/clients/" + client_object_name)

877

1679

DBusObjectWithProperties.__init__(self, self.bus,

878

1680

self.dbus_object_path)

879

880

def notifychangeproperty(transform_func,

881

dbus_name, type_func=lambda x: x,

882

variant_level=1):

1681

1682

def notifychangeproperty(transform_func, dbus_name,

1683

type_func=lambda x: x,

1684

variant_level=1,

1685

invalidate_only=False,

1686

_interface=_interface):

883

1687

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

884

1688

its changes to DBus.

885

886

transform_fun: Function that takes a value and transforms it

887

to a D-Bus type.

1689

1690

transform_fun: Function that takes a value and a variant_level

1691

and transforms it to a D-Bus type.

888

1692

dbus_name: D-Bus name of the variable

889

1693

type_func: Function that transform the value before sending it

890

1694

to the D-Bus. Default: no transform

891

1695

variant_level: D-Bus variant level. Default: 1

892

1696

"""

893

real_value = [None,]

1697

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

1698

894

1699

def setter(self, value):

895

old_value = real_value[0]

896

real_value[0] = value

897

1700

if hasattr(self, "dbus_object_path"):

898

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

899

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

900

variant_level)

901

self.PropertyChanged(dbus.String(dbus_name),

902

dbus_value)

1701

if (not hasattr(self, attrname) or

1702

type_func(getattr(self, attrname, None))

1703

!= type_func(value)):

1704

if invalidate_only:

1705

self.PropertiesChanged(

1706

_interface, dbus.Dictionary(),

1707

dbus.Array((dbus_name, )))

1708

else:

1709

dbus_value = transform_func(

1710

type_func(value),

1711

variant_level = variant_level)

1712

self.PropertyChanged(dbus.String(dbus_name),

1713

dbus_value)

1714

self.PropertiesChanged(

1715

_interface,

1716

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

1717

dbus_value }),

1718

dbus.Array())

1719

setattr(self, attrname, value)

903

1720

904

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

905

1721

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

906

1722

907

1723

expires = notifychangeproperty(datetime_to_dbus, "Expires")

908

1724

approvals_pending = notifychangeproperty(dbus.Boolean,

911

1727

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

912

1728

last_enabled = notifychangeproperty(datetime_to_dbus,

913

1729

"LastEnabled")

914

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

915

type_func = lambda checker: checker is not None)

1730

checker = notifychangeproperty(

1731

dbus.Boolean, "CheckerRunning",

1732

type_func = lambda checker: checker is not None)

916

1733

last_checked_ok = notifychangeproperty(datetime_to_dbus,

917

1734

"LastCheckedOK")

918

last_approval_request = notifychangeproperty(datetime_to_dbus,

919

"LastApprovalRequest")

1735

last_checker_status = notifychangeproperty(dbus.Int16,

1736

"LastCheckerStatus")

1737

last_approval_request = notifychangeproperty(

1738

datetime_to_dbus, "LastApprovalRequest")

920

1739

approved_by_default = notifychangeproperty(dbus.Boolean,

921

1740

"ApprovedByDefault")

922

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

923

type_func = _timedelta_to_milliseconds)

924

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

925

type_func = _timedelta_to_milliseconds)

1741

approval_delay = notifychangeproperty(

1742

dbus.UInt64, "ApprovalDelay",

1743

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

1744

approval_duration = notifychangeproperty(

1745

dbus.UInt64, "ApprovalDuration",

1746

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

926

1747

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

927

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

928

type_func = _timedelta_to_milliseconds)

929

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

930

type_func = _timedelta_to_milliseconds)

931

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

932

type_func = _timedelta_to_milliseconds)

1748

timeout = notifychangeproperty(

1749

dbus.UInt64, "Timeout",

1750

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

1751

extended_timeout = notifychangeproperty(

1752

dbus.UInt64, "ExtendedTimeout",

1753

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

1754

interval = notifychangeproperty(

1755

dbus.UInt64, "Interval",

1756

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

933

1757

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

1758

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

1759

invalidate_only=True)

934

1760

935

1761

del notifychangeproperty

936

1762

943

1769

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

944

1770

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

945

1771

946

def checker_callback(self, pid, condition, command,

947

*args, **kwargs):

948

self.checker_callback_tag = None

949

self.checker = None

950

if os.WIFEXITED(condition):

951

exitstatus = os.WEXITSTATUS(condition)

1772

def checker_callback(self, source, condition,

1773

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

1774

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

1775

connection, command, *args,

1776

**kwargs)

1777

exitstatus = self.last_checker_status

1778

if exitstatus >= 0:

952

1779

# Emit D-Bus signal

953

1780

self.CheckerCompleted(dbus.Int16(exitstatus),

954

dbus.Int64(condition),

1781

# This is specific to GNU libC

1782

dbus.Int64(exitstatus << 8),

955

1783

dbus.String(command))

956

1784

else:

957

1785

# Emit D-Bus signal

958

1786

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

959

dbus.Int64(condition),

1787

dbus.Int64(

1788

# This is specific to GNU libC

1789

(exitstatus << 8)

1790

| self.last_checker_signal),

960

1791

dbus.String(command))

961

962

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

963

*args, **kwargs)

1792

return ret

964

1793

965

1794

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

966

old_checker = self.checker

967

if self.checker is not None:

968

old_checker_pid = self.checker.pid

969

else:

970

old_checker_pid = None

1795

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

971

1796

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

972

1797

# Only if new checker process was started

973

1798

if (self.checker is not None

977

1802

return r

978

1803

979

1804

def _reset_approved(self):

980

self._approved = None

1805

self.approved = None

981

1806

return False

982

1807

983

1808

def approve(self, value=True):

1809

self.approved = value

1810

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

1811

* 1000), self._reset_approved)

984

1812

self.send_changedstate()

985

self._approved = value

986

gobject.timeout_add(_timedelta_to_milliseconds

987

(self.approval_duration),

988

self._reset_approved)

989

990

1813

991

1814

## D-Bus methods, signals & properties

992

_interface = "se.recompile.Mandos.Client"

1815

1816

## Interfaces

993

1817

994

1818

## Signals

995

1819

1006

1830

pass

1007

1831

1008

1832

# PropertyChanged - signal

1833

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

1009

1834

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

1010

1835

def PropertyChanged(self, property, value):

1011

1836

"D-Bus signal"

1045

1870

self.checked_ok()

1046

1871

1047

1872

# Enable - method

1873

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

1048

1874

@dbus.service.method(_interface)

1049

1875

def Enable(self):

1050

1876

"D-Bus method"

1051

1877

self.enable()

1052

1878

1053

1879

# StartChecker - method

1880

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

1054

1881

@dbus.service.method(_interface)

1055

1882

def StartChecker(self):

1056

1883

"D-Bus method"

1057

1884

self.start_checker()

1058

1885

1059

1886

# Disable - method

1887

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

1060

1888

@dbus.service.method(_interface)

1061

1889

def Disable(self):

1062

1890

"D-Bus method"

1063

1891

self.disable()

1064

1892

1065

1893

# StopChecker - method

1894

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

1066

1895

@dbus.service.method(_interface)

1067

1896

def StopChecker(self):

1068

1897

self.stop_checker()

1075

1904

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

1076

1905

1077

1906

# ApprovedByDefault - property

1078

@dbus_service_property(_interface, signature="b",

1907

@dbus_service_property(_interface,

1908

signature="b",

1079

1909

access="readwrite")

1080

1910

def ApprovedByDefault_dbus_property(self, value=None):

1081

1911

if value is None: # get

1083

1913

self.approved_by_default = bool(value)

1084

1914

1085

1915

# ApprovalDelay - property

1086

@dbus_service_property(_interface, signature="t",

1916

@dbus_service_property(_interface,

1917

signature="t",

1087

1918

access="readwrite")

1088

1919

def ApprovalDelay_dbus_property(self, value=None):

1089

1920

if value is None: # get

1090

return dbus.UInt64(self.approval_delay_milliseconds())

1921

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

1922

* 1000)

1091

1923

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

1092

1924

1093

1925

# ApprovalDuration - property

1094

@dbus_service_property(_interface, signature="t",

1926

@dbus_service_property(_interface,

1927

signature="t",

1095

1928

access="readwrite")

1096

1929

def ApprovalDuration_dbus_property(self, value=None):

1097

1930

if value is None: # get

1098

return dbus.UInt64(_timedelta_to_milliseconds(

1099

self.approval_duration))

1931

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

1932

* 1000)

1100

1933

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

1101

1934

1102

1935

# Name - property

1936

@dbus_annotations(

1937

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

1103

1938

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

1104

1939

def Name_dbus_property(self):

1105

1940

return dbus.String(self.name)

1106

1941

1107

1942

# Fingerprint - property

1943

@dbus_annotations(

1944

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

1108

1945

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

1109

1946

def Fingerprint_dbus_property(self):

1110

1947

return dbus.String(self.fingerprint)

1111

1948

1112

1949

# Host - property

1113

@dbus_service_property(_interface, signature="s",

1950

@dbus_service_property(_interface,

1951

signature="s",

1114

1952

access="readwrite")

1115

1953

def Host_dbus_property(self, value=None):

1116

1954

if value is None: # get

1117

1955

return dbus.String(self.host)

1118

self.host = value

1956

self.host = str(value)

1119

1957

1120

1958

# Created - property

1959

@dbus_annotations(

1960

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

1121

1961

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

1122

1962

def Created_dbus_property(self):

1123

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

1963

return datetime_to_dbus(self.created)

1124

1964

1125

1965

# LastEnabled - property

1126

1966

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

1128

1968

return datetime_to_dbus(self.last_enabled)

1129

1969

1130

1970

# Enabled - property

1131

@dbus_service_property(_interface, signature="b",

1971

@dbus_service_property(_interface,

1972

signature="b",

1132

1973

access="readwrite")

1133

1974

def Enabled_dbus_property(self, value=None):

1134

1975

if value is None: # get

1139

1980

self.disable()

1140

1981

1141

1982

# LastCheckedOK - property

1142

@dbus_service_property(_interface, signature="s",

1983

@dbus_service_property(_interface,

1984

signature="s",

1143

1985

access="readwrite")

1144

1986

def LastCheckedOK_dbus_property(self, value=None):

1145

1987

if value is not None:

1147

1989

return

1148

1990

return datetime_to_dbus(self.last_checked_ok)

1149

1991

1992

# LastCheckerStatus - property

1993

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

1994

def LastCheckerStatus_dbus_property(self):

1995

return dbus.Int16(self.last_checker_status)

1996

1150

1997

# Expires - property

1151

1998

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

1152

1999

def Expires_dbus_property(self):

1158

2005

return datetime_to_dbus(self.last_approval_request)

1159

2006

1160

2007

# Timeout - property

1161

@dbus_service_property(_interface, signature="t",

2008

@dbus_service_property(_interface,

2009

signature="t",

1162

2010

access="readwrite")

1163

2011

def Timeout_dbus_property(self, value=None):

1164

2012

if value is None: # get

1165

return dbus.UInt64(self.timeout_milliseconds())

2013

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

2014

old_timeout = self.timeout

1166

2015

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

1167

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

1168

return

1169

# Reschedule timeout

1170

gobject.source_remove(self.disable_initiator_tag)

1171

self.disable_initiator_tag = None

1172

self.expires = None

1173

time_to_die = (self.

1174

_timedelta_to_milliseconds((self

1175

.last_checked_ok

1176

+ self.timeout)

1177

- datetime.datetime

1178

.utcnow()))

1179

if time_to_die <= 0:

1180

# The timeout has passed

1181

self.disable()

1182

else:

1183

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

1184

+ datetime.timedelta(milliseconds = time_to_die))

1185

self.disable_initiator_tag = (gobject.timeout_add

1186

(time_to_die, self.disable))

2016

# Reschedule disabling

2017

if self.enabled:

2018

now = datetime.datetime.utcnow()

2019

self.expires += self.timeout - old_timeout

2020

if self.expires <= now:

2021

# The timeout has passed

2022

self.disable()

2023

else:

2024

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

2025

is None):

2026

return

2027

GObject.source_remove(self.disable_initiator_tag)

2028

self.disable_initiator_tag = GObject.timeout_add(

2029

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

2030

self.disable)

1187

2031

1188

2032

# ExtendedTimeout - property

1189

@dbus_service_property(_interface, signature="t",

2033

@dbus_service_property(_interface,

2034

signature="t",

1190

2035

access="readwrite")

1191

2036

def ExtendedTimeout_dbus_property(self, value=None):

1192

2037

if value is None: # get

1193

return dbus.UInt64(self.extended_timeout_milliseconds())

2038

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

2039

* 1000)

1194

2040

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

1195

2041

1196

2042

# Interval - property

1197

@dbus_service_property(_interface, signature="t",

2043

@dbus_service_property(_interface,

2044

signature="t",

1198

2045

access="readwrite")

1199

2046

def Interval_dbus_property(self, value=None):

1200

2047

if value is None: # get

1201

return dbus.UInt64(self.interval_milliseconds())

2048

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

1202

2049

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

1203

2050

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

1204

2051

return

1205

# Reschedule checker run

1206

gobject.source_remove(self.checker_initiator_tag)

1207

self.checker_initiator_tag = (gobject.timeout_add

1208

(value, self.start_checker))

1209

self.start_checker() # Start one now, too

2052

if self.enabled:

2053

# Reschedule checker run

2054

GObject.source_remove(self.checker_initiator_tag)

2055

self.checker_initiator_tag = GObject.timeout_add(

2056

value, self.start_checker)

2057

self.start_checker() # Start one now, too

1210

2058

1211

2059

# Checker - property

1212

@dbus_service_property(_interface, signature="s",

2060

@dbus_service_property(_interface,

2061

signature="s",

1213

2062

access="readwrite")

1214

2063

def Checker_dbus_property(self, value=None):

1215

2064

if value is None: # get

1216

2065

return dbus.String(self.checker_command)

1217

self.checker_command = value

2066

self.checker_command = str(value)

1218

2067

1219

2068

# CheckerRunning - property

1220

@dbus_service_property(_interface, signature="b",

2069

@dbus_service_property(_interface,

2070

signature="b",

1221

2071

access="readwrite")

1222

2072

def CheckerRunning_dbus_property(self, value=None):

1223

2073

if value is None: # get

1228

2078

self.stop_checker()

1229

2079

1230

2080

# ObjectPath - property

2081

@dbus_annotations(

2082

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

2083

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

1231

2084

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

1232

2085

def ObjectPath_dbus_property(self):

1233

2086

return self.dbus_object_path # is already a dbus.ObjectPath

1234

2087

1235

2088

# Secret = property

1236

@dbus_service_property(_interface, signature="ay",

1237

access="write", byte_arrays=True)

2089

@dbus_annotations(

2090

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

2091

"invalidates"})

2092

@dbus_service_property(_interface,

2093

signature="ay",

2094

access="write",

2095

byte_arrays=True)

1238

2096

def Secret_dbus_property(self, value):

1239

self.secret = str(value)

2097

self.secret = bytes(value)

1240

2098

1241

2099

del _interface

1242

2100

1246

2104

self._pipe = child_pipe

1247

2105

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

1248

2106

if not self._pipe.recv():

1249

raise KeyError()

2107

raise KeyError(fpr)

1250

2108

1251

2109

def __getattribute__(self, name):

1252

if(name == '_pipe'):

2110

if name == '_pipe':

1253

2111

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

1254

2112

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

1255

2113

data = self._pipe.recv()

1256

2114

if data[0] == 'data':

1257

2115

return data[1]

1258

2116

if data[0] == 'function':

2117

1259

2118

def func(*args, **kwargs):

1260

2119

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

1261

2120

return self._pipe.recv()[1]

2121

1262

2122

return func

1263

2123

1264

2124

def __setattr__(self, name, value):

1265

if(name == '_pipe'):

2125

if name == '_pipe':

1266

2126

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

1267

2127

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

1268

2128

1269

class ClientDBusTransitional(ClientDBus):

1270

__metaclass__ = AlternateDBusNamesMetaclass

1271

2129

1272

2130

class ClientHandler(socketserver.BaseRequestHandler, object):

1273

2131

"""A class to handle client connections.

1278

2136

def handle(self):

1279

2137

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

1280

2138

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

1281

unicode(self.client_address))

2139

str(self.client_address))

1282

2140

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

1283

2141

self.server.child_pipe.fileno())

1284

2142

1285

session = (gnutls.connection

1286

.ClientSession(self.request,

1287

gnutls.connection

1288

.X509Credentials()))

1289

1290

# Note: gnutls.connection.X509Credentials is really a

1291

# generic GnuTLS certificate credentials object so long as

1292

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

1293

# here despite using OpenPGP certificates.

2143

session = gnutls.ClientSession(self.request)

1294

2144

1295

2145

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

1296

2146

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

1300

2150

priority = self.server.gnutls_priority

1301

2151

if priority is None:

1302

2152

priority = "NORMAL"

1303

(gnutls.library.functions

1304

.gnutls_priority_set_direct(session._c_object,

1305

priority, None))

2153

gnutls.priority_set_direct(session._c_object, priority,

2154

None)

1306

2155

1307

2156

# Start communication using the Mandos protocol

1308

2157

# Get protocol number

1310

2159

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

1311

2160

try:

1312

2161

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

1313

raise RuntimeError

2162

raise RuntimeError(line)

1314

2163

except (ValueError, IndexError, RuntimeError) as error:

1315

2164

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

1316

2165

return

1318

2167

# Start GnuTLS connection

1319

2168

try:

1320

2169

session.handshake()

1321

except gnutls.errors.GNUTLSError as error:

2170

except gnutls.Error as error:

1322

2171

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

1323

2172

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

1324

2173

# established. Just abandon the request.

1328

2177

approval_required = False

1329

2178

try:

1330

2179

try:

1331

fpr = self.fingerprint(self.peer_certificate

1332

(session))

1333

except (TypeError,

1334

gnutls.errors.GNUTLSError) as error:

2180

fpr = self.fingerprint(

2181

self.peer_certificate(session))

2182

except (TypeError, gnutls.Error) as error:

1335

2183

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

1336

2184

return

1337

2185

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

1350

2198

while True:

1351

2199

if not client.enabled:

1352

2200

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

1353

client.name)

2201

client.name)

1354

2202

if self.server.use_dbus:

1355

2203

# Emit D-Bus signal

1356

client.Rejected("Disabled")

2204

client.Rejected("Disabled")

1357

2205

return

1358

2206

1359

if client._approved or not client.approval_delay:

2207

if client.approved or not client.approval_delay:

1360

2208

#We are approved or approval is disabled

1361

2209

break

1362

elif client._approved is None:

2210

elif client.approved is None:

1363

2211

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

1364

2212

client.name)

1365

2213

if self.server.use_dbus:

1366

2214

# Emit D-Bus signal

1367

2215

client.NeedApproval(

1368

client.approval_delay_milliseconds(),

1369

client.approved_by_default)

2216

client.approval_delay.total_seconds()

2217

* 1000, client.approved_by_default)

1370

2218

else:

1371

2219

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

1372

2220

client.name)

1376

2224

return

1377

2225

1378

2226

#wait until timeout or approved

1379

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

1380

2227

time = datetime.datetime.now()

1381

2228

client.changedstate.acquire()

1382

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

2229

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

1383

2230

client.changedstate.release()

1384

2231

time2 = datetime.datetime.now()

1385

2232

if (time2 - time) >= delay:

1396

2243

else:

1397

2244

delay -= time2 - time

1398

2245

1399

sent_size = 0

1400

while sent_size < len(client.secret):

1401

try:

1402

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

1403

except gnutls.errors.GNUTLSError as error:

1404

logger.warning("gnutls send failed")

1405

return

1406

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

1407

sent, len(client.secret)

1408

- (sent_size + sent))

1409

sent_size += sent

2246

try:

2247

session.send(client.secret)

2248

except gnutls.Error as error:

2249

logger.warning("gnutls send failed",

2250

exc_info = error)

2251

return

1410

2252

1411

2253

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

1412

# bump the timeout as if seen

1413

client.checked_ok(client.extended_timeout)

2254

# bump the timeout using extended_timeout

2255

client.bump_timeout(client.extended_timeout)

1414

2256

if self.server.use_dbus:

1415

2257

# Emit D-Bus signal

1416

2258

client.GotSecret()

1420

2262

client.approvals_pending -= 1

1421

2263

try:

1422

2264

session.bye()

1423

except gnutls.errors.GNUTLSError as error:

1424

logger.warning("GnuTLS bye failed")

2265

except gnutls.Error as error:

2266

logger.warning("GnuTLS bye failed",

2267

exc_info=error)

1425

2268

1426

2269

@staticmethod

1427

2270

def peer_certificate(session):

1428

2271

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

1429

2272

# If not an OpenPGP certificate...

1430

if (gnutls.library.functions

1431

.gnutls_certificate_type_get(session._c_object)

1432

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1433

# ...do the normal thing

1434

return session.peer_certificate

2273

if (gnutls.certificate_type_get(session._c_object)

2274

!= gnutls.CRT_OPENPGP):

2275

# ...return invalid data

2276

return b""

1435

2277

list_size = ctypes.c_uint(1)

1436

cert_list = (gnutls.library.functions

1437

.gnutls_certificate_get_peers

2278

cert_list = (gnutls.certificate_get_peers

1438

2279

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

1439

2280

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

1440

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

1441

" certificate")

2281

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

1442

2282

if list_size.value == 0:

1443

2283

return None

1444

2284

cert = cert_list[0]

1448

2288

def fingerprint(openpgp):

1449

2289

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1450

2290

# New GnuTLS "datum" with the OpenPGP public key

1451

datum = (gnutls.library.types

1452

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

1453

ctypes.POINTER

1454

(ctypes.c_ubyte)),

1455

ctypes.c_uint(len(openpgp))))

2291

datum = gnutls.datum_t(

2292

ctypes.cast(ctypes.c_char_p(openpgp),

2293

ctypes.POINTER(ctypes.c_ubyte)),

2294

ctypes.c_uint(len(openpgp)))

1456

2295

# New empty GnuTLS certificate

1457

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1458

(gnutls.library.functions

1459

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2296

crt = gnutls.openpgp_crt_t()

2297

gnutls.openpgp_crt_init(ctypes.byref(crt))

1460

2298

# Import the OpenPGP public key into the certificate

1461

(gnutls.library.functions

1462

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

1463

gnutls.library.constants

1464

.GNUTLS_OPENPGP_FMT_RAW))

2299

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

2300

gnutls.OPENPGP_FMT_RAW)

1465

2301

# Verify the self signature in the key

1466

2302

crtverify = ctypes.c_uint()

1467

(gnutls.library.functions

1468

.gnutls_openpgp_crt_verify_self(crt, 0,

1469

ctypes.byref(crtverify)))

2303

gnutls.openpgp_crt_verify_self(crt, 0,

2304

ctypes.byref(crtverify))

1470

2305

if crtverify.value != 0:

1471

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1472

raise (gnutls.errors.CertificateSecurityError

1473

("Verify failed"))

2306

gnutls.openpgp_crt_deinit(crt)

2307

raise gnutls.CertificateSecurityError("Verify failed")

1474

2308

# New buffer for the fingerprint

1475

2309

buf = ctypes.create_string_buffer(20)

1476

2310

buf_len = ctypes.c_size_t()

1477

2311

# Get the fingerprint from the certificate into the buffer

1478

(gnutls.library.functions

1479

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

1480

ctypes.byref(buf_len)))

2312

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

2313

ctypes.byref(buf_len))

1481

2314

# Deinit the certificate

1482

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2315

gnutls.openpgp_crt_deinit(crt)

1483

2316

# Convert the buffer to a Python bytestring

1484

2317

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

1485

2318

# Convert the bytestring to hexadecimal notation

1486

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

2319

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

1487

2320

return hex_fpr

1488

2321

1489

2322

1490

2323

class MultiprocessingMixIn(object):

1491

2324

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

2325

1492

2326

def sub_process_main(self, request, address):

1493

2327

try:

1494

2328

self.finish_request(request, address)

1495

except:

2329

except Exception:

1496

2330

self.handle_error(request, address)

1497

2331

self.close_request(request)

1498

2332

1499

2333

def process_request(self, request, address):

1500

2334

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

1501

multiprocessing.Process(target = self.sub_process_main,

1502

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

2335

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

2336

args = (request, address))

2337

proc.start()

2338

return proc

1503

2339

1504

2340

1505

2341

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1506

2342

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

2343

1507

2344

def process_request(self, request, client_address):

1508

2345

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

1509

2346

1511

2348

"""

1512

2349

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1513

2350

1514

super(MultiprocessingMixInWithPipe,

1515

self).process_request(request, client_address)

2351

proc = MultiprocessingMixIn.process_request(self, request,

2352

client_address)

1516

2353

self.child_pipe.close()

1517

self.add_pipe(parent_pipe)

2354

self.add_pipe(parent_pipe, proc)

1518

2355

1519

def add_pipe(self, parent_pipe):

2356

def add_pipe(self, parent_pipe, proc):

1520

2357

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

1521

raise NotImplementedError

2358

raise NotImplementedError()

1522

2359

1523

2360

1524

2361

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1530

2367

interface: None or a network interface name (string)

1531

2368

use_ipv6: Boolean; to use IPv6 or not

1532

2369

"""

2370

1533

2371

def __init__(self, server_address, RequestHandlerClass,

1534

interface=None, use_ipv6=True):

2372

interface=None,

2373

use_ipv6=True,

2374

socketfd=None):

2375

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

2376

creating a new one with socket.socket().

2377

"""

1535

2378

self.interface = interface

1536

2379

if use_ipv6:

1537

2380

self.address_family = socket.AF_INET6

2381

if socketfd is not None:

2382

# Save the file descriptor

2383

self.socketfd = socketfd

2384

# Save the original socket.socket() function

2385

self.socket_socket = socket.socket

2386

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

2387

#

2388

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

2389

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

2390

# patching socket.socket.)

2391

#

2392

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

2393

@functools.wraps(socket.socket)

2394

def socket_wrapper(*args, **kwargs):

2395

# Restore original function so subsequent calls are

2396

# not affected.

2397

socket.socket = self.socket_socket

2398

del self.socket_socket

2399

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

2400

# saved file descriptor.

2401

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

2402

# Replace socket.socket() function with wrapper

2403

socket.socket = socket_wrapper

2404

# The socketserver.TCPServer.__init__ will call

2405

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

2406

# socket_wrapper(), if socketfd was set.

1538

2407

socketserver.TCPServer.__init__(self, server_address,

1539

2408

RequestHandlerClass)

2409

1540

2410

def server_bind(self):

1541

2411

"""This overrides the normal server_bind() function

1542

2412

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

1548

2418

self.interface)

1549

2419

else:

1550

2420

try:

1551

self.socket.setsockopt(socket.SOL_SOCKET,

1552

SO_BINDTODEVICE,

1553

str(self.interface

1554

+ '\0'))

2421

self.socket.setsockopt(

2422

socket.SOL_SOCKET, SO_BINDTODEVICE,

2423

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

1555

2424

except socket.error as error:

1556

if error[0] == errno.EPERM:

1557

logger.error("No permission to"

1558

" bind to interface %s",

1559

self.interface)

1560

elif error[0] == errno.ENOPROTOOPT:

2425

if error.errno == errno.EPERM:

2426

logger.error("No permission to bind to"

2427

" interface %s", self.interface)

2428

elif error.errno == errno.ENOPROTOOPT:

1561

2429

logger.error("SO_BINDTODEVICE not available;"

1562

2430

" cannot bind to interface %s",

1563

2431

self.interface)

2432

elif error.errno == errno.ENODEV:

2433

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

2434

" cannot bind", self.interface)

1564

2435

else:

1565

2436

raise

1566

2437

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

1569

2440

if self.address_family == socket.AF_INET6:

1570

2441

any_address = "::" # in6addr_any

1571

2442

else:

1572

any_address = socket.INADDR_ANY

2443

any_address = "0.0.0.0" # INADDR_ANY

1573

2444

self.server_address = (any_address,

1574

2445

self.server_address[1])

1575

2446

elif not self.server_address[1]:

1576

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

1577

0)

2447

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

1578

2448

# if self.interface:

1579

2449

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

1580

2450

# 0, # port

1592

2462

gnutls_priority GnuTLS priority string

1593

2463

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

1594

2464

1595

Assumes a gobject.MainLoop event loop.

2465

Assumes a GObject.MainLoop event loop.

1596

2466

"""

2467

1597

2468

def __init__(self, server_address, RequestHandlerClass,

1598

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

1599

gnutls_priority=None, use_dbus=True):

2469

interface=None,

2470

use_ipv6=True,

2471

clients=None,

2472

gnutls_priority=None,

2473

use_dbus=True,

2474

socketfd=None):

1600

2475

self.enabled = False

1601

2476

self.clients = clients

1602

2477

if self.clients is None:

1603

self.clients = set()

2478

self.clients = {}

1604

2479

self.use_dbus = use_dbus

1605

2480

self.gnutls_priority = gnutls_priority

1606

2481

IPv6_TCPServer.__init__(self, server_address,

1607

2482

RequestHandlerClass,

1608

2483

interface = interface,

1609

use_ipv6 = use_ipv6)

2484

use_ipv6 = use_ipv6,

2485

socketfd = socketfd)

2486

1610

2487

def server_activate(self):

1611

2488

if self.enabled:

1612

2489

return socketserver.TCPServer.server_activate(self)

2490

1613

2491

def enable(self):

1614

2492

self.enabled = True

1615

def add_pipe(self, parent_pipe):

2493

2494

def add_pipe(self, parent_pipe, proc):

1616

2495

# Call "handle_ipc" for both data and EOF events

1617

gobject.io_add_watch(parent_pipe.fileno(),

1618

gobject.IO_IN | gobject.IO_HUP,

1619

functools.partial(self.handle_ipc,

1620

parent_pipe = parent_pipe))

1621

1622

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

2496

GObject.io_add_watch(

2497

parent_pipe.fileno(),

2498

GObject.IO_IN | GObject.IO_HUP,

2499

functools.partial(self.handle_ipc,

2500

parent_pipe = parent_pipe,

2501

proc = proc))

2502

2503

def handle_ipc(self, source, condition,

2504

parent_pipe=None,

2505

proc = None,

1623

2506

client_object=None):

1624

condition_names = {

1625

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

1626

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

1627

# blocking).

1628

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

1629

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

1630

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

1631

# broken, usually for pipes and

1632

# sockets).

1633

}

1634

conditions_string = ' | '.join(name

1635

for cond, name in

1636

condition_names.iteritems()

1637

if cond & condition)

1638

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

1639

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

2507

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

2508

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

2509

# Wait for other process to exit

2510

proc.join()

1640

2511

return False

1641

2512

1642

2513

# Read a request from the child

1647

2518

fpr = request[1]

1648

2519

address = request[2]

1649

2520

1650

for c in self.clients:

2521

for c in self.clients.itervalues():

1651

2522

if c.fingerprint == fpr:

1652

2523

client = c

1653

2524

break

1656

2527

"dress: %s", fpr, address)

1657

2528

if self.use_dbus:

1658

2529

# Emit D-Bus signal

1659

mandos_dbus_service.ClientNotFound(fpr, address[0])

2530

mandos_dbus_service.ClientNotFound(fpr,

2531

address[0])

1660

2532

parent_pipe.send(False)

1661

2533

return False

1662

2534

1663

gobject.io_add_watch(parent_pipe.fileno(),

1664

gobject.IO_IN | gobject.IO_HUP,

1665

functools.partial(self.handle_ipc,

1666

parent_pipe = parent_pipe,

1667

client_object = client))

2535

GObject.io_add_watch(

2536

parent_pipe.fileno(),

2537

GObject.IO_IN | GObject.IO_HUP,

2538

functools.partial(self.handle_ipc,

2539

parent_pipe = parent_pipe,

2540

proc = proc,

2541

client_object = client))

1668

2542

parent_pipe.send(True)

1669

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

2543

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

2544

# same fileno

1670

2545

return False

1671

2546

if command == 'funcall':

1672

2547

funcname = request[1]

1673

2548

args = request[2]

1674

2549

kwargs = request[3]

1675

2550

1676

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

2551

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

2552

funcname)(*args,

2553

**kwargs)))

1677

2554

1678

2555

if command == 'getattr':

1679

2556

attrname = request[1]

1680

if callable(client_object.__getattribute__(attrname)):

1681

parent_pipe.send(('function',))

2557

if isinstance(client_object.__getattribute__(attrname),

2558

collections.Callable):

2559

parent_pipe.send(('function', ))

1682

2560

else:

1683

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

2561

parent_pipe.send((

2562

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

1684

2563

1685

2564

if command == 'setattr':

1686

2565

attrname = request[1]

1690

2569

return True

1691

2570

1692

2571

2572

def rfc3339_duration_to_delta(duration):

2573

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

2574

2575

>>> rfc3339_duration_to_delta("P7D")

2576

datetime.timedelta(7)

2577

>>> rfc3339_duration_to_delta("PT60S")

2578

datetime.timedelta(0, 60)

2579

>>> rfc3339_duration_to_delta("PT60M")

2580

datetime.timedelta(0, 3600)

2581

>>> rfc3339_duration_to_delta("PT24H")

2582

datetime.timedelta(1)

2583

>>> rfc3339_duration_to_delta("P1W")

2584

datetime.timedelta(7)

2585

>>> rfc3339_duration_to_delta("PT5M30S")

2586

datetime.timedelta(0, 330)

2587

>>> rfc3339_duration_to_delta("P1DT3M20S")

2588

datetime.timedelta(1, 200)

2589

"""

2590

2591

# Parsing an RFC 3339 duration with regular expressions is not

2592

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

2593

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

2594

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

2595

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

2596

# avoid excessive use of external libraries.

2597

2598

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

2599

Token = collections.namedtuple("Token", (

2600

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

2601

# a "group" containing digits

2602

"value", # datetime.timedelta or None

2603

"followers")) # Tokens valid after this token

2604

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

2605

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

2606

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

2607

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

2608

datetime.timedelta(seconds=1),

2609

frozenset((token_end, )))

2610

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

2611

datetime.timedelta(minutes=1),

2612

frozenset((token_second, token_end)))

2613

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

2614

datetime.timedelta(hours=1),

2615

frozenset((token_minute, token_end)))

2616

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

2617

None,

2618

frozenset((token_hour, token_minute,

2619

token_second)))

2620

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

2621

datetime.timedelta(days=1),

2622

frozenset((token_time, token_end)))

2623

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

2624

datetime.timedelta(weeks=4),

2625

frozenset((token_day, token_end)))

2626

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

2627

datetime.timedelta(weeks=52),

2628

frozenset((token_month, token_end)))

2629

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

2630

datetime.timedelta(weeks=1),

2631

frozenset((token_end, )))

2632

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

2633

frozenset((token_year, token_month,

2634

token_day, token_time,

2635

token_week)))

2636

# Define starting values

2637

value = datetime.timedelta() # Value so far

2638

found_token = None

2639

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

2640

s = duration # String left to parse

2641

# Loop until end token is found

2642

while found_token is not token_end:

2643

# Search for any currently valid tokens

2644

for token in followers:

2645

match = token.regexp.match(s)

2646

if match is not None:

2647

# Token found

2648

if token.value is not None:

2649

# Value found, parse digits

2650

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

2651

# Add to value so far

2652

value += factor * token.value

2653

# Strip token from string

2654

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

2655

# Go to found token

2656

found_token = token

2657

# Set valid next tokens

2658

followers = found_token.followers

2659

break

2660

else:

2661

# No currently valid tokens were found

2662

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

2663

.format(duration))

2664

# End token found

2665

return value

2666

2667

1693

2668

def string_to_delta(interval):

1694

2669

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

1695

2670

1706

2681

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

1707

2682

datetime.timedelta(0, 330)

1708

2683

"""

2684

2685

try:

2686

return rfc3339_duration_to_delta(interval)

2687

except ValueError:

2688

pass

2689

1709

2690

timevalue = datetime.timedelta(0)

1710

2691

for s in interval.split():

1711

2692

try:

1712

suffix = unicode(s[-1])

2693

suffix = s[-1]

1713

2694

value = int(s[:-1])

1714

2695

if suffix == "d":

1715

2696

delta = datetime.timedelta(value)

1722

2703

elif suffix == "w":

1723

2704

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

1724

2705

else:

1725

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

1726

except (ValueError, IndexError) as e:

2706

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

2707

except IndexError as e:

1727

2708

raise ValueError(*(e.args))

1728

2709

timevalue += delta

1729

2710

return timevalue

1730

2711

1731

2712

1732

def if_nametoindex(interface):

1733

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

1734

1735

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

1736

global if_nametoindex

1737

try:

1738

if_nametoindex = (ctypes.cdll.LoadLibrary

1739

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

1740

.if_nametoindex)

1741

except (OSError, AttributeError):

1742

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

1743

def if_nametoindex(interface):

1744

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

1745

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

1746

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

1747

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1748

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

1749

interface))

1750

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

1751

ifreq[16:20])[0]

1752

return interface_index

1753

return if_nametoindex(interface)

1754

1755

1756

2713

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

1757

2714

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

1758

2715

1766

2723

sys.exit()

1767

2724

if not noclose:

1768

2725

# Close all standard open file descriptors

1769

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

2726

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

1770

2727

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

1771

2728

raise OSError(errno.ENODEV,

1772

"%s not a character device"

1773

% os.path.devnull)

2729

"{} not a character device"

2730

.format(os.devnull))

1774

2731

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

1775

2732

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

1776

2733

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

1785

2742

1786

2743

parser = argparse.ArgumentParser()

1787

2744

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

1788

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

2745

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

1789

2746

help="show version number and exit")

1790

2747

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

1791

2748

help="Bind to interface IF")

1797

2754

help="Run self-test")

1798

2755

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

1799

2756

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

1800

" to terminal")

2757

" to terminal", default=None)

1801

2758

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

1802

2759

help="Debug level for stdout output")

1803

2760

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

1810

2767

" files")

1811

2768

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

1812

2769

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

1813

" system bus interface")

2770

" system bus interface", default=None)

1814

2771

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

1815

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

2772

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

2773

default=None)

2774

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

2775

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

2776

" state", default=None)

2777

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

2778

help="Specify a file descriptor to a network"

2779

" socket to use instead of creating one")

2780

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

2781

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

2782

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

2783

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

2784

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

2785

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

2786

default=None)

2787

1816

2788

options = parser.parse_args()

1817

2789

1818

2790

if options.check:

1819

2791

import doctest

1820

doctest.testmod()

1821

sys.exit()

2792

fail_count, test_count = doctest.testmod()

2793

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

1822

2794

1823

2795

# Default values for config file for server-global settings

1824

2796

server_defaults = { "interface": "",

1826

2798

"port": "",

1827

2799

"debug": "False",

1828

2800

"priority":

1829

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

2801

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

2802

":+SIGN-DSA-SHA256",

1830

2803

"servicename": "Mandos",

1831

2804

"use_dbus": "True",

1832

2805

"use_ipv6": "True",

1833

2806

"debuglevel": "",

1834

}

2807

"restore": "True",

2808

"socket": "",

2809

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

2810

"foreground": "False",

2811

"zeroconf": "True",

2812

}

1835

2813

1836

2814

# Parse config file for server-global settings

1837

2815

server_config = configparser.SafeConfigParser(server_defaults)

1838

2816

del server_defaults

1839

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

1840

"mandos.conf"))

2817

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

1841

2818

# Convert the SafeConfigParser object to a dict

1842

2819

server_settings = server_config.defaults()

1843

2820

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

1844

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

2821

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

1845

2822

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

1846

2823

option)

1847

2824

if server_settings["port"]:

1848

2825

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

1849

2826

"port")

2827

if server_settings["socket"]:

2828

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

2829

"socket")

2830

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

2831

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

2832

# happen with a supplied network socket.

2833

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

2834

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

2835

["socket"])

1850

2836

del server_config

1851

2837

1852

2838

# Override the settings from the config file with command line

1853

2839

# options, if set.

1854

2840

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

1855

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

1856

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

2841

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

2842

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

2843

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

1857

2844

value = getattr(options, option)

1858

2845

if value is not None:

1859

2846

server_settings[option] = value

1860

2847

del options

1861

2848

# Force all strings to be unicode

1862

2849

for option in server_settings.keys():

1863

if type(server_settings[option]) is str:

1864

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

2850

if isinstance(server_settings[option], bytes):

2851

server_settings[option] = (server_settings[option]

2852

.decode("utf-8"))

2853

# Force all boolean options to be boolean

2854

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

2855

"foreground", "zeroconf"):

2856

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

2857

# Debug implies foreground

2858

if server_settings["debug"]:

2859

server_settings["foreground"] = True

1865

2860

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

1866

2861

1867

2862

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

1868

2863

2864

if (not server_settings["zeroconf"]

2865

and not (server_settings["port"]

2866

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

2867

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

2868

1869

2869

# For convenience

1870

2870

debug = server_settings["debug"]

1871

2871

debuglevel = server_settings["debuglevel"]

1872

2872

use_dbus = server_settings["use_dbus"]

1873

2873

use_ipv6 = server_settings["use_ipv6"]

2874

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

2875

stored_state_file)

2876

foreground = server_settings["foreground"]

2877

zeroconf = server_settings["zeroconf"]

2878

2879

if debug:

2880

initlogger(debug, logging.DEBUG)

2881

else:

2882

if not debuglevel:

2883

initlogger(debug)

2884

else:

2885

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

2886

initlogger(debug, level)

1874

2887

1875

2888

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

1876

syslogger.setFormatter(logging.Formatter

1877

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

1878

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

1879

% server_settings["servicename"]))

2889

syslogger.setFormatter(

2890

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

2891

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

2892

server_settings["servicename"])))

1880

2893

1881

2894

# Parse config file with clients

1882

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

1883

"extended_timeout": "15m",

1884

"interval": "2m",

1885

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

1886

"host": "",

1887

"approval_delay": "0s",

1888

"approval_duration": "1s",

1889

}

1890

client_config = configparser.SafeConfigParser(client_defaults)

2895

client_config = configparser.SafeConfigParser(Client

2896

.client_defaults)

1891

2897

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

1892

2898

"clients.conf"))

1893

2899

1894

2900

global mandos_dbus_service

1895

2901

mandos_dbus_service = None

1896

2902

1897

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

1898

server_settings["port"]),

1899

ClientHandler,

1900

interface=(server_settings["interface"]

1901

or None),

1902

use_ipv6=use_ipv6,

1903

gnutls_priority=

1904

server_settings["priority"],

1905

use_dbus=use_dbus)

1906

if not debug:

1907

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

2903

socketfd = None

2904

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

2905

socketfd = server_settings["socket"]

2906

tcp_server = MandosServer(

2907

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

2908

ClientHandler,

2909

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

2910

use_ipv6=use_ipv6,

2911

gnutls_priority=server_settings["priority"],

2912

use_dbus=use_dbus,

2913

socketfd=socketfd)

2914

if not foreground:

2915

pidfilename = "/run/mandos.pid"

2916

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

2917

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

2918

pidfile = None

1908

2919

try:

1909

pidfile = open(pidfilename, "w")

1910

except IOError:

1911

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

2920

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

2921

except IOError as e:

2922

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

2923

exc_info=e)

1912

2924

1913

try:

1914

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

1915

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

1916

except KeyError:

2925

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

2926

("mandos", "mandos"),

2927

("nobody", "nogroup")):

1917

2928

try:

1918

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

1919

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

2929

uid = pwd.getpwnam(name).pw_uid

2930

gid = pwd.getpwnam(group).pw_gid

2931

break

1920

2932

except KeyError:

1921

try:

1922

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

1923

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

1924

except KeyError:

1925

uid = 65534

1926

gid = 65534

2933

continue

2934

else:

2935

uid = 65534

2936

gid = 65534

1927

2937

try:

1928

2938

os.setgid(gid)

1929

2939

os.setuid(uid)

1930

2940

except OSError as error:

1931

if error[0] != errno.EPERM:

1932

raise error

1933

1934

if not debug and not debuglevel:

1935

syslogger.setLevel(logging.WARNING)

1936

console.setLevel(logging.WARNING)

1937

if debuglevel:

1938

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

1939

syslogger.setLevel(level)

1940

console.setLevel(level)

2941

if error.errno != errno.EPERM:

2942

raise

1941

2943

1942

2944

if debug:

1943

2945

# Enable all possible GnuTLS debugging

1944

2946

1945

2947

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

1946

2948

# - GnuTLS manual

1947

gnutls.library.functions.gnutls_global_set_log_level(11)

2949

gnutls.global_set_log_level(11)

1948

2950

1949

@gnutls.library.types.gnutls_log_func

2951

@gnutls.log_func

1950

2952

def debug_gnutls(level, string):

1951

2953

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

1952

2954

1953

(gnutls.library.functions

1954

.gnutls_global_set_log_function(debug_gnutls))

2955

gnutls.global_set_log_function(debug_gnutls)

1955

2956

1956

2957

# Redirect stdin so all checkers get /dev/null

1957

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

2958

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

1958

2959

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

1959

2960

if null > 2:

1960

2961

os.close(null)

1961

else:

1962

# No console logging

1963

logger.removeHandler(console)

1964

2962

1965

2963

# Need to fork before connecting to D-Bus

1966

if not debug:

2964

if not foreground:

1967

2965

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

1968

2966

daemon()

1969

2967

2968

# multiprocessing will use threads, so before we use GObject we

2969

# need to inform GObject that threads will be used.

2970

GObject.threads_init()

2971

1970

2972

global main_loop

1971

2973

# From the Avahi example code

1972

DBusGMainLoop(set_as_default=True )

1973

main_loop = gobject.MainLoop()

2974

DBusGMainLoop(set_as_default=True)

2975

main_loop = GObject.MainLoop()

1974

2976

bus = dbus.SystemBus()

1975

2977

# End of Avahi example code

1976

2978

if use_dbus:

1977

2979

try:

1978

2980

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

1979

bus, do_not_queue=True)

1980

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

1981

bus, do_not_queue=True)

1982

except dbus.exceptions.NameExistsException as e:

1983

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

2981

bus,

2982

do_not_queue=True)

2983

old_bus_name = dbus.service.BusName(

2984

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

2985

do_not_queue=True)

2986

except dbus.exceptions.DBusException as e:

2987

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

1984

2988

use_dbus = False

1985

2989

server_settings["use_dbus"] = False

1986

2990

tcp_server.use_dbus = False

1987

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1988

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

1989

servicetype = "_mandos._tcp",

1990

protocol = protocol, bus = bus)

1991

if server_settings["interface"]:

1992

service.interface = (if_nametoindex

1993

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

2991

if zeroconf:

2992

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2993

service = AvahiServiceToSyslog(

2994

name = server_settings["servicename"],

2995

servicetype = "_mandos._tcp",

2996

protocol = protocol,

2997

bus = bus)

2998

if server_settings["interface"]:

2999

service.interface = if_nametoindex(

3000

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

1994

3001

1995

3002

global multiprocessing_manager

1996

3003

multiprocessing_manager = multiprocessing.Manager()

1997

3004

1998

3005

client_class = Client

1999

3006

if use_dbus:

2000

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

2001

def client_config_items(config, section):

2002

special_settings = {

2003

"approved_by_default":

2004

lambda: config.getboolean(section,

2005

"approved_by_default"),

2006

}

2007

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

3007

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

3008

3009

client_settings = Client.config_parser(client_config)

3010

old_client_settings = {}

3011

clients_data = {}

3012

3013

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

3014

global wnull

3015

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

3016

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

3017

# mode

3018

if debug or not foreground:

3019

wnull.close()

3020

3021

# Get client data and settings from last running state.

3022

if server_settings["restore"]:

3023

try:

3024

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

3025

clients_data, old_client_settings = pickle.load(

3026

stored_state)

3027

os.remove(stored_state_path)

3028

except IOError as e:

3029

if e.errno == errno.ENOENT:

3030

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

3031

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

3032

else:

3033

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

3034

exc_info=e)

3035

raise

3036

except EOFError as e:

3037

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

3038

"EOFError:",

3039

exc_info=e)

3040

3041

with PGPEngine() as pgp:

3042

for client_name, client in clients_data.items():

3043

# Skip removed clients

3044

if client_name not in client_settings:

3045

continue

3046

3047

# Decide which value to use after restoring saved state.

3048

# We have three different values: Old config file,

3049

# new config file, and saved state.

3050

# New config value takes precedence if it differs from old

3051

# config value, otherwise use saved state.

3052

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

3053

try:

3054

# For each value in new config, check if it

3055

# differs from the old config value (Except for

3056

# the "secret" attribute)

3057

if (name != "secret"

3058

and (value !=

3059

old_client_settings[client_name][name])):

3060

client[name] = value

3061

except KeyError:

3062

pass

3063

3064

# Clients who has passed its expire date can still be

3065

# enabled if its last checker was successful. A Client

3066

# whose checker succeeded before we stored its state is

3067

# assumed to have successfully run all checkers during

3068

# downtime.

3069

if client["enabled"]:

3070

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

3071

if not client["last_checked_ok"]:

3072

logger.warning(

3073

"disabling client {} - Client never "

3074

"performed a successful checker".format(

3075

client_name))

3076

client["enabled"] = False

3077

elif client["last_checker_status"] != 0:

3078

logger.warning(

3079

"disabling client {} - Client last"

3080

" checker failed with error code"

3081

" {}".format(

3082

client_name,

3083

client["last_checker_status"]))

3084

client["enabled"] = False

3085

else:

3086

client["expires"] = (

3087

datetime.datetime.utcnow()

3088

+ client["timeout"])

3089

logger.debug("Last checker succeeded,"

3090

" keeping {} enabled".format(

3091

client_name))

2008

3092

try:

2009

yield (name, special_settings[name]())

2010

except KeyError:

2011

yield (name, value)

2012

2013

tcp_server.clients.update(set(

2014

client_class(name = section,

2015

config= dict(client_config_items(

2016

client_config, section)))

2017

for section in client_config.sections()))

3093

client["secret"] = pgp.decrypt(

3094

client["encrypted_secret"],

3095

client_settings[client_name]["secret"])

3096

except PGPError:

3097

# If decryption fails, we use secret from new settings

3098

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

3099

client_name))

3100

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

3101

["secret"])

3102

3103

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

3104

for client_name in (set(old_client_settings)

3105

- set(client_settings)):

3106

del clients_data[client_name]

3107

for client_name in (set(client_settings)

3108

- set(old_client_settings)):

3109

clients_data[client_name] = client_settings[client_name]

3110

3111

# Create all client objects

3112

for client_name, client in clients_data.items():

3113

tcp_server.clients[client_name] = client_class(

3114

name = client_name,

3115

settings = client,

3116

server_settings = server_settings)

3117

2018

3118

if not tcp_server.clients:

2019

3119

logger.warning("No clients defined")

2020

2021

if not debug:

2022

try:

2023

with pidfile:

2024

pid = os.getpid()

2025

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

2026

del pidfile

2027

except IOError:

2028

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

2029

pidfilename, pid)

2030

except NameError:

2031

# "pidfile" was never created

2032

pass

3120

3121

if not foreground:

3122

if pidfile is not None:

3123

pid = os.getpid()

3124

try:

3125

with pidfile:

3126

print(pid, file=pidfile)

3127

except IOError:

3128

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

3129

pidfilename, pid)

3130

del pidfile

2033

3131

del pidfilename

2034

2035

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

2036

3132

2037

3133

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

2038

3134

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

2039

3135

2040

3136

if use_dbus:

2041

class MandosDBusService(dbus.service.Object):

3137

3138

@alternate_dbus_interfaces(

3139

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

3140

class MandosDBusService(DBusObjectWithObjectManager):

2042

3141

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

3142

2043

3143

def __init__(self):

2044

3144

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

3145

2045

3146

_interface = "se.recompile.Mandos"

2046

3147

2047

3148

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

2054

3155

"D-Bus signal"

2055

3156

pass

2056

3157

3158

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

3159

"true"})

2057

3160

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

2058

3161

def ClientRemoved(self, objpath, name):

2059

3162

"D-Bus signal"

2060

3163

pass

2061

3164

3165

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

3166

"true"})

2062

3167

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

2063

3168

def GetAllClients(self):

2064

3169

"D-Bus method"

2065

return dbus.Array(c.dbus_object_path

2066

for c in tcp_server.clients)

3170

return dbus.Array(c.dbus_object_path for c in

3171

tcp_server.clients.itervalues())

2067

3172

3173

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

3174

"true"})

2068

3175

@dbus.service.method(_interface,

2069

3176

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

2070

3177

def GetAllClientsWithProperties(self):

2071

3178

"D-Bus method"

2072

3179

return dbus.Dictionary(

2073

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

2074

for c in tcp_server.clients),

3180

{ c.dbus_object_path: c.GetAll(

3181

"se.recompile.Mandos.Client")

3182

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

2075

3183

signature="oa{sv}")

2076

3184

2077

3185

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

2078

3186

def RemoveClient(self, object_path):

2079

3187

"D-Bus method"

2080

for c in tcp_server.clients:

3188

for c in tcp_server.clients.itervalues():

2081

3189

if c.dbus_object_path == object_path:

2082

tcp_server.clients.remove(c)

3190

del tcp_server.clients[c.name]

2083

3191

c.remove_from_connection()

2084

# Don't signal anything except ClientRemoved

3192

# Don't signal the disabling

2085

3193

c.disable(quiet=True)

2086

# Emit D-Bus signal

2087

self.ClientRemoved(object_path, c.name)

3194

# Emit D-Bus signal for removal

3195

self.client_removed_signal(c)

2088

3196

return

2089

3197

raise KeyError(object_path)

2090

3198

2091

3199

del _interface

3200

3201

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3202

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

3203

def GetManagedObjects(self):

3204

"""D-Bus method"""

3205

return dbus.Dictionary(

3206

{ client.dbus_object_path:

3207

dbus.Dictionary(

3208

{ interface: client.GetAll(interface)

3209

for interface in

3210

client._get_all_interface_names()})

3211

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

3212

3213

def client_added_signal(self, client):

3214

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

3215

if use_dbus:

3216

# New standard signal

3217

self.InterfacesAdded(

3218

client.dbus_object_path,

3219

dbus.Dictionary(

3220

{ interface: client.GetAll(interface)

3221

for interface in

3222

client._get_all_interface_names()}))

3223

# Old signal

3224

self.ClientAdded(client.dbus_object_path)

3225

3226

def client_removed_signal(self, client):

3227

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

3228

if use_dbus:

3229

# New standard signal

3230

self.InterfacesRemoved(

3231

client.dbus_object_path,

3232

client._get_all_interface_names())

3233

# Old signal

3234

self.ClientRemoved(client.dbus_object_path,

3235

client.name)

2092

3236

2093

class MandosDBusServiceTransitional(MandosDBusService):

2094

__metaclass__ = AlternateDBusNamesMetaclass

2095

mandos_dbus_service = MandosDBusServiceTransitional()

3237

mandos_dbus_service = MandosDBusService()

2096

3238

2097

3239

def cleanup():

2098

3240

"Cleanup function; run on exit"

2099

service.cleanup()

2100

3241

if zeroconf:

3242

service.cleanup()

3243

3244

multiprocessing.active_children()

3245

wnull.close()

3246

if not (tcp_server.clients or client_settings):

3247

return

3248

3249

# Store client before exiting. Secrets are encrypted with key

3250

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

3251

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

3252

clients = {}

3253

with PGPEngine() as pgp:

3254

for client in tcp_server.clients.itervalues():

3255

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

3256

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

3257

key)

3258

client_dict = {}

3259

3260

# A list of attributes that can not be pickled

3261

# + secret.

3262

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

3263

"checker", "server_settings" }

3264

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

3265

.Object):

3266

exclude.add(name)

3267

3268

client_dict["encrypted_secret"] = (client

3269

.encrypted_secret)

3270

for attr in client.client_structure:

3271

if attr not in exclude:

3272

client_dict[attr] = getattr(client, attr)

3273

3274

clients[client.name] = client_dict

3275

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

3276

3277

try:

3278

with tempfile.NamedTemporaryFile(

3279

mode='wb',

3280

suffix=".pickle",

3281

prefix='clients-',

3282

dir=os.path.dirname(stored_state_path),

3283

delete=False) as stored_state:

3284

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

3285

tempname = stored_state.name

3286

os.rename(tempname, stored_state_path)

3287

except (IOError, OSError) as e:

3288

if not debug:

3289

try:

3290

os.remove(tempname)

3291

except NameError:

3292

pass

3293

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

3294

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

3295

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

3296

else:

3297

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

3298

exc_info=e)

3299

raise

3300

3301

# Delete all clients, and settings from config

2101

3302

while tcp_server.clients:

2102

client = tcp_server.clients.pop()

3303

name, client = tcp_server.clients.popitem()

2103

3304

if use_dbus:

2104

3305

client.remove_from_connection()

2105

client.disable_hook = None

2106

# Don't signal anything except ClientRemoved

3306

# Don't signal the disabling

2107

3307

client.disable(quiet=True)

3308

# Emit D-Bus signal for removal

2108

3309

if use_dbus:

2109

# Emit D-Bus signal

2110

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2111

client.name)

3310

mandos_dbus_service.client_removed_signal(client)

3311

client_settings.clear()

2112

3312

2113

3313

atexit.register(cleanup)

2114

3314

2115

for client in tcp_server.clients:

3315

for client in tcp_server.clients.itervalues():

2116

3316

if use_dbus:

2117

# Emit D-Bus signal

2118

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2119

client.enable()

3317

# Emit D-Bus signal for adding

3318

mandos_dbus_service.client_added_signal(client)

3319

# Need to initiate checking of clients

3320

if client.enabled:

3321

client.init_checker()

2120

3322

2121

3323

tcp_server.enable()

2122

3324

tcp_server.server_activate()

2123

3325

2124

3326

# Find out what port we got

2125

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

3327

if zeroconf:

3328

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

2126

3329

if use_ipv6:

2127

3330

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

2128

" flowinfo %d, scope_id %d"

2129

% tcp_server.socket.getsockname())

3331

" flowinfo %d, scope_id %d",

3332

*tcp_server.socket.getsockname())

2130

3333

else: # IPv4

2131

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

2132

% tcp_server.socket.getsockname())

3334

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

3335

*tcp_server.socket.getsockname())

2133

3336

2134

3337

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

2135

3338

2136

3339

try:

2137

# From the Avahi example code

2138

try:

2139

service.activate()

2140

except dbus.exceptions.DBusException as error:

2141

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

2142

cleanup()

2143

sys.exit(1)

2144

# End of Avahi example code

3340

if zeroconf:

3341

# From the Avahi example code

3342

try:

3343

service.activate()

3344

except dbus.exceptions.DBusException as error:

3345

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

3346

cleanup()

3347

sys.exit(1)

3348

# End of Avahi example code

2145

3349

2146

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

3350

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

2147

3351

lambda *args, **kwargs:

2148

3352

(tcp_server.handle_request

2149

3353

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

2151

3355

logger.debug("Starting main loop")

2152

3356

main_loop.run()

2153

3357

except AvahiError as error:

2154

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

3358

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

2155

3359

cleanup()

2156

3360

sys.exit(1)

2157

3361

except KeyboardInterrupt: