/mandos/trunk : revision 24.1.186

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

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#

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# Everything else is

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#

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

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

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# along with this program. If not, see

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

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#

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

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

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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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 SocketServer as socketserver

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import socket

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import argparse

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import datetime

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import errno

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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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 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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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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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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class AvahiError(Exception):

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

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self.value = value

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

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**kwargs)

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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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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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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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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, remove=True):

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def rename(self):

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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 = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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

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

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self.name)

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if remove:

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self.remove()

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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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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

175

self.cleanup()

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os._exit(1)

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self.rename_count += 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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361

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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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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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str(error))

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

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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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def cleanup(self):

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

377

223

if self.group is not None:

378

224

try:

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225

self.group.Free()

380

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except (dbus.exceptions.UnknownMethodException,

381

dbus.exceptions.DBusException):

227

dbus.exceptions.DBusException) as e:

382

228

pass

383

229

self.group = None

384

230

self.remove()

385

386

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

387

232

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

388

233

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

389

bad_states = {

390

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",

394

}

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",

239

avahi.SERVER_FAILURE:

240

"Zeroconf server failure" }

395

241

if state in bad_states:

396

242

if bad_states[state] is not None:

397

243

if error is None:

400

246

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

401

247

self.cleanup()

402

248

elif state == avahi.SERVER_RUNNING:

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)

249

self.add()

415

250

else:

416

251

if error is None:

417

252

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

418

253

else:

419

254

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

420

421

255

def activate(self):

422

256

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

423

257

if self.server is None:

427

261

follow_name_owner_changes=True),

428

262

avahi.DBUS_INTERFACE_SERVER)

429

263

self.server.connect_to_signal("StateChanged",

430

self.server_state_changed)

264

self.server_state_changed)

431

265

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

432

266

433

267

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

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

708

274

class Client(object):

709

275

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

710

276

711

277

Attributes:

712

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

278

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

713

279

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

714

280

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

715

281

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

716

282

to see if the client lives.

717

283

'None' if no process is running.

718

checker_callback_tag: a GObject event source tag, or None

284

checker_callback_tag: a gobject event source tag, or None

719

285

checker_command: string; External command which is run to check

720

286

if client lives. %() expansions are done at

721

287

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

722

288

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

723

checker_initiator_tag: a GObject event source tag, or None

289

checker_initiator_tag: a gobject event source tag, or None

724

290

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

727

291

current_checker_command: string; current running checker_command

728

disable_initiator_tag: a GObject event source tag, or None

292

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

293

disable_initiator_tag: a gobject event source tag, or None

729

294

enabled: bool()

730

295

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

731

296

uniquely identify the client

733

298

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

734

299

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

735

300

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

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

301

last_enabled: datetime.datetime(); (UTC)

742

302

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

743

303

D-Bus identifiers

744

304

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

745

305

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

746

306

until this client is disabled

747

extended_timeout: extra long timeout when secret has been sent

307

extended_timeout: extra long timeout when password has been sent

748

308

runtime_expansions: Allowed attributes for runtime expansion.

749

309

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

750

310

disabled, or None

751

server_settings: The server_settings dict from main()

752

311

"""

753

312

754

313

runtime_expansions = ("approval_delay", "approval_duration",

755

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

756

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

757

"last_approval_request", "last_checked_ok",

314

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

315

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

758

316

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

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):

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."""

822

337

self.name = name

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

338

if config is None:

339

config = {}

840

340

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(" ", ""))

841

346

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

842

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

843

datetime.datetime.utcnow())

844

845

# attributes specific for this server instance

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

846

367

self.checker = None

847

368

self.checker_initiator_tag = None

848

369

self.disable_initiator_tag = None

370

self.expires = None

849

371

self.checker_callback_tag = None

372

self.checker_command = config["checker"]

850

373

self.current_checker_command = None

851

self.approved = None

374

self.last_connect = None

375

self._approved = None

376

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

377

True)

852

378

self.approvals_pending = 0

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)

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())

864

384

865

# Send notice to process children that client state has changed

866

385

def send_changedstate(self):

867

with self.changedstate:

868

self.changedstate.notify_all()

869

386

self.changedstate.acquire()

387

self.changedstate.notify_all()

388

self.changedstate.release()

389

870

390

def enable(self):

871

391

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

872

392

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

873

393

# Already enabled

874

394

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

875

402

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

403

self.disable_initiator_tag = (gobject.timeout_add

404

(self.timeout_milliseconds(),

405

self.disable))

876

406

self.enabled = True

877

407

self.last_enabled = datetime.datetime.utcnow()

878

self.init_checker()

879

self.send_changedstate()

408

# Also start a new checker *right now*.

409

self.start_checker()

880

410

881

411

def disable(self, quiet=True):

882

412

"""Disable this client."""

883

413

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

884

414

return False

885

415

if not quiet:

416

self.send_changedstate()

417

if not quiet:

886

418

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

887

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

888

GObject.source_remove(self.disable_initiator_tag)

419

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

420

gobject.source_remove(self.disable_initiator_tag)

889

421

self.disable_initiator_tag = None

890

422

self.expires = None

891

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

892

GObject.source_remove(self.checker_initiator_tag)

423

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

424

gobject.source_remove(self.checker_initiator_tag)

893

425

self.checker_initiator_tag = None

894

426

self.stop_checker()

427

if self.disable_hook:

428

self.disable_hook(self)

895

429

self.enabled = False

896

if not quiet:

897

self.send_changedstate()

898

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

430

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

899

431

return False

900

432

901

433

def __del__(self):

434

self.disable_hook = None

902

435

self.disable()

903

436

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):

437

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

922

438

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

923

439

self.checker_callback_tag = None

924

440

self.checker = None

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:

441

if os.WIFEXITED(condition):

442

exitstatus = os.WEXITSTATUS(condition)

443

if exitstatus == 0:

933

444

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

934

445

vars(self))

935

446

self.checked_ok()

936

447

else:

937

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

448

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

449

vars(self))

938

450

else:

939

self.last_checker_status = -1

940

self.last_checker_signal = -returncode

941

451

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

942

452

vars(self))

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."""

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

"""

954

460

if timeout is None:

955

461

timeout = self.timeout

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

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))

963

468

964

469

def need_approval(self):

965

470

self.last_approval_request = datetime.datetime.utcnow()

970

475

If a checker already exists, leave it running and do

971

476

nothing."""

972

477

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

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

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

977

482

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

978

483

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

979

484

# should be.

980

485

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

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)

985

499

# Start a new checker if needed

986

500

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 }

991

501

try:

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

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

998

520

self.current_checker_command = command

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

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

1025

545

return True

1026

546

1027

547

def stop_checker(self):

1028

548

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

1029

549

if self.checker_callback_tag:

1030

GObject.source_remove(self.checker_callback_tag)

550

gobject.source_remove(self.checker_callback_tag)

1031

551

self.checker_callback_tag = None

1032

552

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

1033

553

return

1034

554

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

1035

self.checker.terminate()

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

1036

563

self.checker = None

1037

564

1038

565

1039

def dbus_service_property(dbus_interface,

1040

signature="v",

1041

access="readwrite",

1042

byte_arrays=False):

566

def dbus_service_property(dbus_interface, signature="v",

567

access="readwrite", byte_arrays=False):

1043

568

"""Decorators for marking methods of a DBusObjectWithProperties to

1044

569

become properties on the D-Bus.

1045

570

1054

579

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

1055

580

if byte_arrays and signature != "ay":

1056

581

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

1057

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

1058

582

" signature %r" % signature)

1059

583

def decorator(func):

1060

584

func._dbus_is_property = True

1061

585

func._dbus_interface = dbus_interface

1066

590

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

1067

591

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1068

592

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

1113

593

return decorator

1114

594

1115

595

1116

596

class DBusPropertyException(dbus.exceptions.DBusException):

1117

597

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

1118

598

"""

1119

pass

599

def __unicode__(self):

600

return unicode(str(self))

1120

601

1121

602

1122

603

class DBusPropertyAccessException(DBusPropertyException):

1131

612

pass

1132

613

1133

614

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):

615

class DBusObjectWithProperties(dbus.service.Object):

1224

616

"""A D-Bus object with properties.

1225

617

1226

618

Classes inheriting from this can use the dbus_service_property

1228

620

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

1229

621

"""

1230

622

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

1231

634

def _get_dbus_property(self, interface_name, property_name):

1232

635

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

1233

636

property with the specified name and interface.

1234

637

"""

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):

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:

1240

641

return value.__get__(self)

1241

642

1242

643

# No such property

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",

644

raise DBusPropertyNotFound(self.dbus_object_path + ":"

645

+ interface_name + "."

646

+ property_name)

647

648

649

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

1257

650

out_signature="v")

1258

651

def Get(self, interface_name, property_name):

1259

652

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

1277

670

# The byte_arrays option is not supported yet on

1278

671

# signatures other than "ay".

1279

672

if prop._dbus_signature != "ay":

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))

673

raise ValueError

674

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

675

for byte in value))

1285

676

prop(value)

1286

677

1287

@dbus.service.method(dbus.PROPERTIES_IFACE,

1288

in_signature="s",

678

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

1289

679

out_signature="a{sv}")

1290

680

def GetAll(self, interface_name):

1291

681

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

1293

683

1294

684

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

1295

685

"""

1296

properties = {}

1297

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

686

all = {}

687

for name, prop in self._get_all_dbus_properties():

1298

688

if (interface_name

1299

689

and interface_name != prop._dbus_interface):

1300

690

# Interface non-empty but did not match

1304

694

continue

1305

695

value = prop()

1306

696

if not hasattr(value, "variant_level"):

1307

properties[name] = value

697

all[name] = value

1308

698

continue

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

699

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

700

value.variant_level+1)

701

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

1320

702

1321

703

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1322

704

out_signature="s",

1323

705

path_keyword='object_path',

1324

706

connection_keyword='connection')

1325

707

def Introspect(self, object_path, connection):

1326

"""Overloading of standard D-Bus method.

1327

1328

Inserts property tags and interface annotation tags.

708

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

1329

709

"""

1330

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1331

object_path,

1332

connection)

710

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

711

connection)

1333

712

try:

1334

713

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

1335

1336

714

def make_tag(document, name, prop):

1337

715

e = document.createElement("property")

1338

716

e.setAttribute("name", name)

1339

717

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

1340

718

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

1341

719

return e

1342

1343

720

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

1344

# Add property tags

1345

721

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

1346

722

for name, prop

1347

in self._get_all_dbus_things("property")

723

in self._get_all_dbus_properties()

1348

724

if prop._dbus_interface

1349

725

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

1350

726

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)

1367

727

# Add the names to the return values for the

1368

728

# "org.freedesktop.DBus.Properties" methods

1369

729

if (if_tag.getAttribute("name")

1384

744

except (AttributeError, xml.dom.DOMException,

1385

745

xml.parsers.expat.ExpatError) as error:

1386

746

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

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):

747

error)

748

return xmlstring

749

750

751

def datetime_to_dbus (dt, variant_level=0):

1460

752

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

1461

753

if dt is None:

1462

754

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

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).

1488

"""

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):

1497

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

1498

# with the wrong interface name

1499

if (not hasattr(attribute, "_dbus_interface")

1500

or not attribute._dbus_interface.startswith(

1501

orig_interface_name)):

1502

continue

1503

# Create an alternate D-Bus interface name based on

1504

# the current name

1505

alt_interface = attribute._dbus_interface.replace(

1506

orig_interface_name, alt_interface_name)

1507

interface_names.add(alt_interface)

1508

# Is this a D-Bus signal?

1509

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

1510

if sys.version_info.major == 2:

1511

# Extract the original non-method undecorated

1512

# function by black magic

1513

nonmethod_func = (dict(

1514

zip(attribute.func_code.co_freevars,

1515

attribute.__closure__))

1516

["func"].cell_contents)

1517

else:

1518

nonmethod_func = attribute

1519

# Create a new, but exactly alike, function

1520

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

1521

# with the alternate D-Bus interface name

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

1545

# Define a creator of a function to call both the

1546

# original and alternate functions, so both the

1547

# original and alternate signals gets sent when

1548

# the function is called

1549

def fixscope(func1, func2):

1550

"""This function is a scope container to pass

1551

func1 and func2 to the "call_both" function

1552

outside of its arguments"""

1553

1554

@functools.wraps(func2)

1555

def call_both(*args, **kwargs):

1556

"""This function will emit two D-Bus

1557

signals by calling func1 and func2"""

1558

func1(*args, **kwargs)

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

1565

return call_both

1566

# Create the "call_both" function and add it to

1567

# the class

1568

attr[attrname] = fixscope(attribute, new_function)

1569

# Is this a D-Bus method?

1570

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

1571

# Create a new, but exactly alike, function

1572

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

1573

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

1574

# to the class.

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

1591

# Is this a D-Bus property?

1592

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

1593

# Create a new, but exactly alike, function

1594

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

1595

# property with the alternate D-Bus interface

1596

# name. Add it to the class.

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"})

755

return dbus.String(dt.isoformat(),

756

variant_level=variant_level)

757

758

class transitional_dbus_metaclass(DBusObjectWithProperties.__metaclass__):

759

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

760

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

761

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

762

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

763

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

764

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

765

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

766

newfunc = types.FunctionType(unwrappedfunc.func_code,

767

unwrappedfunc.func_globals,

768

unwrappedfunc.func_name,

769

unwrappedfunc.func_defaults,

770

unwrappedfunc.func_closure)

771

new_dbusfunc = dbus.service.signal(

772

new_interface, old_dbusobj._dbus_signature)(newfunc)

773

attr["_transitional_" + attrname] = new_dbusfunc

774

775

def fixscope(func1, func2):

776

def newcall(*args, **kwargs):

777

func1(*args, **kwargs)

778

func2(*args, **kwargs)

779

return newcall

780

781

attr[attrname] = fixscope(old_dbusobj, new_dbusfunc)

782

783

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

784

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

785

new_dbusfunc = (dbus.service.method

786

(new_interface,

787

old_dbusobj._dbus_in_signature,

788

old_dbusobj._dbus_out_signature)

789

(types.FunctionType

790

(old_dbusobj.func_code,

791

old_dbusobj.func_globals,

792

old_dbusobj.func_name,

793

old_dbusobj.func_defaults,

794

old_dbusobj.func_closure)))

795

796

attr[attrname] = new_dbusfunc

797

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

798

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

799

new_dbusfunc = (dbus_service_property

800

(new_interface,

801

old_dbusobj._dbus_signature,

802

old_dbusobj._dbus_access,

803

old_dbusobj._dbus_get_args_options["byte_arrays"])

804

(types.FunctionType

805

(old_dbusobj.func_code,

806

old_dbusobj.func_globals,

807

old_dbusobj.func_name,

808

old_dbusobj.func_defaults,

809

old_dbusobj.func_closure)))

810

811

attr[attrname] = new_dbusfunc

812

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

813

1654

814

class ClientDBus(Client, DBusObjectWithProperties):

1655

815

"""A Client class using D-Bus

1656

816

1660

820

"""

1661

821

1662

822

runtime_expansions = (Client.runtime_expansions

1663

+ ("dbus_object_path", ))

1664

1665

_interface = "se.recompile.Mandos.Client"

823

+ ("dbus_object_path",))

1666

824

1667

825

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

1668

826

1669

827

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

828

self._approvals_pending = 0

1670

829

self.bus = bus

1671

830

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

1672

831

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

1673

832

# the D-Bus

1674

client_object_name = str(self.name).translate(

833

client_object_name = unicode(self.name).translate(

1675

834

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

1676

835

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

1677

self.dbus_object_path = dbus.ObjectPath(

1678

"/clients/" + client_object_name)

836

self.dbus_object_path = (dbus.ObjectPath

837

("/clients/" + client_object_name))

1679

838

DBusObjectWithProperties.__init__(self, self.bus,

1680

839

self.dbus_object_path)

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):

1687

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

1688

its changes to DBus.

1689

840

1690

transform_fun: Function that takes a value and a variant_level

1691

and transforms it to a D-Bus type.

1692

dbus_name: D-Bus name of the variable

841

def notifychangeproperty(transform_func,

842

dbus_name, type_func=lambda x: x,

843

variant_level=1):

844

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

845

changes to DBus.

846

transform_fun: Function that takes a value and transform it to

847

DBus type.

848

dbus_name: DBus name of the variable

1693

849

type_func: Function that transform the value before sending it

1694

to the D-Bus. Default: no transform

1695

variant_level: D-Bus variant level. Default: 1

850

to DBus

851

variant_level: DBus variant level. default: 1

1696

852

"""

1697

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

1698

853

real_value = [None,]

1699

854

def setter(self, value):

855

old_value = real_value[0]

856

real_value[0] = value

1700

857

if hasattr(self, "dbus_object_path"):

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)

858

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

859

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

860

variant_level)

861

self.PropertyChanged(dbus.String(dbus_name),

862

dbus_value)

1720

863

1721

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

864

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

865

1722

866

1723

867

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1724

868

approvals_pending = notifychangeproperty(dbus.Boolean,

1727

871

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

1728

872

last_enabled = notifychangeproperty(datetime_to_dbus,

1729

873

"LastEnabled")

1730

checker = notifychangeproperty(

1731

dbus.Boolean, "CheckerRunning",

1732

type_func = lambda checker: checker is not None)

874

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

875

type_func = lambda checker: checker is not None)

1733

876

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1734

877

"LastCheckedOK")

1735

last_checker_status = notifychangeproperty(dbus.Int16,

1736

"LastCheckerStatus")

1737

last_approval_request = notifychangeproperty(

1738

datetime_to_dbus, "LastApprovalRequest")

878

last_approval_request = notifychangeproperty(datetime_to_dbus,

879

"LastApprovalRequest")

1739

880

approved_by_default = notifychangeproperty(dbus.Boolean,

1740

881

"ApprovedByDefault")

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)

882

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

883

type_func = _timedelta_to_milliseconds)

884

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

885

type_func = _timedelta_to_milliseconds)

1747

886

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

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)

887

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

888

type_func = _timedelta_to_milliseconds)

889

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

890

type_func = _timedelta_to_milliseconds)

891

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

892

type_func = _timedelta_to_milliseconds)

1757

893

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

1758

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

1759

invalidate_only=True)

1760

894

1761

895

del notifychangeproperty

1762

896

1769

903

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

1770

904

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

1771

905

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:

906

def checker_callback(self, pid, condition, command,

907

*args, **kwargs):

908

self.checker_callback_tag = None

909

self.checker = None

910

if os.WIFEXITED(condition):

911

exitstatus = os.WEXITSTATUS(condition)

1779

912

# Emit D-Bus signal

1780

913

self.CheckerCompleted(dbus.Int16(exitstatus),

1781

# This is specific to GNU libC

1782

dbus.Int64(exitstatus << 8),

914

dbus.Int64(condition),

1783

915

dbus.String(command))

1784

916

else:

1785

917

# Emit D-Bus signal

1786

918

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

1787

dbus.Int64(

1788

# This is specific to GNU libC

1789

(exitstatus << 8)

1790

| self.last_checker_signal),

919

dbus.Int64(condition),

1791

920

dbus.String(command))

1792

return ret

921

922

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

923

*args, **kwargs)

1793

924

1794

925

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

1795

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

926

old_checker = self.checker

927

if self.checker is not None:

928

old_checker_pid = self.checker.pid

929

else:

930

old_checker_pid = None

1796

931

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

1797

932

# Only if new checker process was started

1798

933

if (self.checker is not None

1802

937

return r

1803

938

1804

939

def _reset_approved(self):

1805

self.approved = None

940

self._approved = None

1806

941

return False

1807

942

1808

943

def approve(self, value=True):

1809

self.approved = value

1810

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

1811

* 1000), self._reset_approved)

1812

944

self.send_changedstate()

945

self._approved = value

946

gobject.timeout_add(_timedelta_to_milliseconds

947

(self.approval_duration),

948

self._reset_approved)

949

1813

950

1814

951

## D-Bus methods, signals & properties

1815

1816

## Interfaces

1817

952

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

953

1818

954

## Signals

1819

955

1820

956

# CheckerCompleted - signal

1830

966

pass

1831

967

1832

968

# PropertyChanged - signal

1833

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

1834

969

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

1835

970

def PropertyChanged(self, property, value):

1836

971

"D-Bus signal"

1870

1005

self.checked_ok()

1871

1006

1872

1007

# Enable - method

1873

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

1874

1008

@dbus.service.method(_interface)

1875

1009

def Enable(self):

1876

1010

"D-Bus method"

1877

1011

self.enable()

1878

1012

1879

1013

# StartChecker - method

1880

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

1881

1014

@dbus.service.method(_interface)

1882

1015

def StartChecker(self):

1883

1016

"D-Bus method"

1884

1017

self.start_checker()

1885

1018

1886

1019

# Disable - method

1887

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

1888

1020

@dbus.service.method(_interface)

1889

1021

def Disable(self):

1890

1022

"D-Bus method"

1891

1023

self.disable()

1892

1024

1893

1025

# StopChecker - method

1894

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

1895

1026

@dbus.service.method(_interface)

1896

1027

def StopChecker(self):

1897

1028

self.stop_checker()

1904

1035

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

1905

1036

1906

1037

# ApprovedByDefault - property

1907

@dbus_service_property(_interface,

1908

signature="b",

1038

@dbus_service_property(_interface, signature="b",

1909

1039

access="readwrite")

1910

1040

def ApprovedByDefault_dbus_property(self, value=None):

1911

1041

if value is None: # get

1913

1043

self.approved_by_default = bool(value)

1914

1044

1915

1045

# ApprovalDelay - property

1916

@dbus_service_property(_interface,

1917

signature="t",

1046

@dbus_service_property(_interface, signature="t",

1918

1047

access="readwrite")

1919

1048

def ApprovalDelay_dbus_property(self, value=None):

1920

1049

if value is None: # get

1921

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

1922

* 1000)

1050

return dbus.UInt64(self.approval_delay_milliseconds())

1923

1051

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

1924

1052

1925

1053

# ApprovalDuration - property

1926

@dbus_service_property(_interface,

1927

signature="t",

1054

@dbus_service_property(_interface, signature="t",

1928

1055

access="readwrite")

1929

1056

def ApprovalDuration_dbus_property(self, value=None):

1930

1057

if value is None: # get

1931

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

1932

* 1000)

1058

return dbus.UInt64(_timedelta_to_milliseconds(

1059

self.approval_duration))

1933

1060

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

1934

1061

1935

1062

# Name - property

1936

@dbus_annotations(

1937

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

1938

1063

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

1939

1064

def Name_dbus_property(self):

1940

1065

return dbus.String(self.name)

1941

1066

1942

1067

# Fingerprint - property

1943

@dbus_annotations(

1944

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

1945

1068

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

1946

1069

def Fingerprint_dbus_property(self):

1947

1070

return dbus.String(self.fingerprint)

1948

1071

1949

1072

# Host - property

1950

@dbus_service_property(_interface,

1951

signature="s",

1073

@dbus_service_property(_interface, signature="s",

1952

1074

access="readwrite")

1953

1075

def Host_dbus_property(self, value=None):

1954

1076

if value is None: # get

1955

1077

return dbus.String(self.host)

1956

self.host = str(value)

1078

self.host = value

1957

1079

1958

1080

# Created - property

1959

@dbus_annotations(

1960

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

1961

1081

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

1962

1082

def Created_dbus_property(self):

1963

return datetime_to_dbus(self.created)

1083

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

1964

1084

1965

1085

# LastEnabled - property

1966

1086

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

1968

1088

return datetime_to_dbus(self.last_enabled)

1969

1089

1970

1090

# Enabled - property

1971

@dbus_service_property(_interface,

1972

signature="b",

1091

@dbus_service_property(_interface, signature="b",

1973

1092

access="readwrite")

1974

1093

def Enabled_dbus_property(self, value=None):

1975

1094

if value is None: # get

1980

1099

self.disable()

1981

1100

1982

1101

# LastCheckedOK - property

1983

@dbus_service_property(_interface,

1984

signature="s",

1102

@dbus_service_property(_interface, signature="s",

1985

1103

access="readwrite")

1986

1104

def LastCheckedOK_dbus_property(self, value=None):

1987

1105

if value is not None:

1989

1107

return

1990

1108

return datetime_to_dbus(self.last_checked_ok)

1991

1109

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

1997

1110

# Expires - property

1998

1111

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

1999

1112

def Expires_dbus_property(self):

2005

1118

return datetime_to_dbus(self.last_approval_request)

2006

1119

2007

1120

# Timeout - property

2008

@dbus_service_property(_interface,

2009

signature="t",

1121

@dbus_service_property(_interface, signature="t",

2010

1122

access="readwrite")

2011

1123

def Timeout_dbus_property(self, value=None):

2012

1124

if value is None: # get

2013

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

2014

old_timeout = self.timeout

1125

return dbus.UInt64(self.timeout_milliseconds())

2015

1126

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

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)

1127

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

1128

return

1129

# Reschedule timeout

1130

gobject.source_remove(self.disable_initiator_tag)

1131

self.disable_initiator_tag = None

1132

self.expires = None

1133

time_to_die = (self.

1134

_timedelta_to_milliseconds((self

1135

.last_checked_ok

1136

+ self.timeout)

1137

- datetime.datetime

1138

.utcnow()))

1139

if time_to_die <= 0:

1140

# The timeout has passed

1141

self.disable()

1142

else:

1143

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

1144

+ datetime.timedelta(milliseconds = time_to_die))

1145

self.disable_initiator_tag = (gobject.timeout_add

1146

(time_to_die, self.disable))

2031

1147

2032

1148

# ExtendedTimeout - property

2033

@dbus_service_property(_interface,

2034

signature="t",

1149

@dbus_service_property(_interface, signature="t",

2035

1150

access="readwrite")

2036

1151

def ExtendedTimeout_dbus_property(self, value=None):

2037

1152

if value is None: # get

2038

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

2039

* 1000)

1153

return dbus.UInt64(self.extended_timeout_milliseconds())

2040

1154

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

2041

1155

2042

1156

# Interval - property

2043

@dbus_service_property(_interface,

2044

signature="t",

1157

@dbus_service_property(_interface, signature="t",

2045

1158

access="readwrite")

2046

1159

def Interval_dbus_property(self, value=None):

2047

1160

if value is None: # get

2048

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

1161

return dbus.UInt64(self.interval_milliseconds())

2049

1162

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

2050

1163

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

2051

1164

return

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

1165

# Reschedule checker run

1166

gobject.source_remove(self.checker_initiator_tag)

1167

self.checker_initiator_tag = (gobject.timeout_add

1168

(value, self.start_checker))

1169

self.start_checker() # Start one now, too

2058

1170

2059

1171

# Checker - property

2060

@dbus_service_property(_interface,

2061

signature="s",

1172

@dbus_service_property(_interface, signature="s",

2062

1173

access="readwrite")

2063

1174

def Checker_dbus_property(self, value=None):

2064

1175

if value is None: # get

2065

1176

return dbus.String(self.checker_command)

2066

self.checker_command = str(value)

1177

self.checker_command = value

2067

1178

2068

1179

# CheckerRunning - property

2069

@dbus_service_property(_interface,

2070

signature="b",

1180

@dbus_service_property(_interface, signature="b",

2071

1181

access="readwrite")

2072

1182

def CheckerRunning_dbus_property(self, value=None):

2073

1183

if value is None: # get

2078

1188

self.stop_checker()

2079

1189

2080

1190

# ObjectPath - property

2081

@dbus_annotations(

2082

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

2083

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

2084

1191

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

2085

1192

def ObjectPath_dbus_property(self):

2086

1193

return self.dbus_object_path # is already a dbus.ObjectPath

2087

1194

2088

1195

# Secret = property

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)

1196

@dbus_service_property(_interface, signature="ay",

1197

access="write", byte_arrays=True)

2096

1198

def Secret_dbus_property(self, value):

2097

self.secret = bytes(value)

1199

self.secret = str(value)

2098

1200

2099

1201

del _interface

2100

1202

2104

1206

self._pipe = child_pipe

2105

1207

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

2106

1208

if not self._pipe.recv():

2107

raise KeyError(fpr)

1209

raise KeyError()

2108

1210

2109

1211

def __getattribute__(self, name):

2110

if name == '_pipe':

1212

if(name == '_pipe'):

2111

1213

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

2112

1214

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

2113

1215

data = self._pipe.recv()

2114

1216

if data[0] == 'data':

2115

1217

return data[1]

2116

1218

if data[0] == 'function':

2117

2118

1219

def func(*args, **kwargs):

2119

1220

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

2120

1221

return self._pipe.recv()[1]

2121

2122

1222

return func

2123

1223

2124

1224

def __setattr__(self, name, value):

2125

if name == '_pipe':

1225

if(name == '_pipe'):

2126

1226

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

2127

1227

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

2128

1228

1229

class ClientDBusTransitional(ClientDBus):

1230

__metaclass__ = transitional_dbus_metaclass

2129

1231

2130

1232

class ClientHandler(socketserver.BaseRequestHandler, object):

2131

1233

"""A class to handle client connections.

2136

1238

def handle(self):

2137

1239

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

2138

1240

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

2139

str(self.client_address))

1241

unicode(self.client_address))

2140

1242

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

2141

1243

self.server.child_pipe.fileno())

2142

1244

2143

session = gnutls.ClientSession(self.request)

1245

session = (gnutls.connection

1246

.ClientSession(self.request,

1247

gnutls.connection

1248

.X509Credentials()))

1249

1250

# Note: gnutls.connection.X509Credentials is really a

1251

# generic GnuTLS certificate credentials object so long as

1252

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

1253

# here despite using OpenPGP certificates.

2144

1254

2145

1255

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

2146

1256

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

2150

1260

priority = self.server.gnutls_priority

2151

1261

if priority is None:

2152

1262

priority = "NORMAL"

2153

gnutls.priority_set_direct(session._c_object, priority,

2154

None)

1263

(gnutls.library.functions

1264

.gnutls_priority_set_direct(session._c_object,

1265

priority, None))

2155

1266

2156

1267

# Start communication using the Mandos protocol

2157

1268

# Get protocol number

2159

1270

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

2160

1271

try:

2161

1272

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

2162

raise RuntimeError(line)

1273

raise RuntimeError

2163

1274

except (ValueError, IndexError, RuntimeError) as error:

2164

1275

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

2165

1276

return

2167

1278

# Start GnuTLS connection

2168

1279

try:

2169

1280

session.handshake()

2170

except gnutls.Error as error:

1281

except gnutls.errors.GNUTLSError as error:

2171

1282

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

2172

1283

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

2173

1284

# established. Just abandon the request.

2177

1288

approval_required = False

2178

1289

try:

2179

1290

try:

2180

fpr = self.fingerprint(

2181

self.peer_certificate(session))

2182

except (TypeError, gnutls.Error) as error:

1291

fpr = self.fingerprint(self.peer_certificate

1292

(session))

1293

except (TypeError,

1294

gnutls.errors.GNUTLSError) as error:

2183

1295

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

2184

1296

return

2185

1297

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

2198

1310

while True:

2199

1311

if not client.enabled:

2200

1312

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

2201

client.name)

1313

client.name)

2202

1314

if self.server.use_dbus:

2203

1315

# Emit D-Bus signal

2204

client.Rejected("Disabled")

1316

client.Rejected("Disabled")

2205

1317

return

2206

1318

2207

if client.approved or not client.approval_delay:

1319

if client._approved or not client.approval_delay:

2208

1320

#We are approved or approval is disabled

2209

1321

break

2210

elif client.approved is None:

1322

elif client._approved is None:

2211

1323

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

2212

1324

client.name)

2213

1325

if self.server.use_dbus:

2214

1326

# Emit D-Bus signal

2215

1327

client.NeedApproval(

2216

client.approval_delay.total_seconds()

2217

* 1000, client.approved_by_default)

1328

client.approval_delay_milliseconds(),

1329

client.approved_by_default)

2218

1330

else:

2219

1331

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

2220

1332

client.name)

2224

1336

return

2225

1337

2226

1338

#wait until timeout or approved

1339

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

2227

1340

time = datetime.datetime.now()

2228

1341

client.changedstate.acquire()

2229

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

1342

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

2230

1343

client.changedstate.release()

2231

1344

time2 = datetime.datetime.now()

2232

1345

if (time2 - time) >= delay:

2243

1356

else:

2244

1357

delay -= time2 - time

2245

1358

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

1359

sent_size = 0

1360

while sent_size < len(client.secret):

1361

try:

1362

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

1363

except gnutls.errors.GNUTLSError as error:

1364

logger.warning("gnutls send failed")

1365

return

1366

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

1367

sent, len(client.secret)

1368

- (sent_size + sent))

1369

sent_size += sent

2252

1370

2253

1371

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

2254

# bump the timeout using extended_timeout

2255

client.bump_timeout(client.extended_timeout)

1372

# bump the timeout as if seen

1373

client.checked_ok(client.extended_timeout)

2256

1374

if self.server.use_dbus:

2257

1375

# Emit D-Bus signal

2258

1376

client.GotSecret()

2262

1380

client.approvals_pending -= 1

2263

1381

try:

2264

1382

session.bye()

2265

except gnutls.Error as error:

2266

logger.warning("GnuTLS bye failed",

2267

exc_info=error)

1383

except gnutls.errors.GNUTLSError as error:

1384

logger.warning("GnuTLS bye failed")

2268

1385

2269

1386

@staticmethod

2270

1387

def peer_certificate(session):

2271

1388

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

2272

1389

# If not an OpenPGP certificate...

2273

if (gnutls.certificate_type_get(session._c_object)

2274

!= gnutls.CRT_OPENPGP):

2275

# ...return invalid data

2276

return b""

1390

if (gnutls.library.functions

1391

.gnutls_certificate_type_get(session._c_object)

1392

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1393

# ...do the normal thing

1394

return session.peer_certificate

2277

1395

list_size = ctypes.c_uint(1)

2278

cert_list = (gnutls.certificate_get_peers

1396

cert_list = (gnutls.library.functions

1397

.gnutls_certificate_get_peers

2279

1398

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

2280

1399

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

2281

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

1400

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

1401

" certificate")

2282

1402

if list_size.value == 0:

2283

1403

return None

2284

1404

cert = cert_list[0]

2288

1408

def fingerprint(openpgp):

2289

1409

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2290

1410

# New GnuTLS "datum" with the OpenPGP public key

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)))

1411

datum = (gnutls.library.types

1412

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

1413

ctypes.POINTER

1414

(ctypes.c_ubyte)),

1415

ctypes.c_uint(len(openpgp))))

2295

1416

# New empty GnuTLS certificate

2296

crt = gnutls.openpgp_crt_t()

2297

gnutls.openpgp_crt_init(ctypes.byref(crt))

1417

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1418

(gnutls.library.functions

1419

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2298

1420

# Import the OpenPGP public key into the certificate

2299

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

2300

gnutls.OPENPGP_FMT_RAW)

1421

(gnutls.library.functions

1422

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

1423

gnutls.library.constants

1424

.GNUTLS_OPENPGP_FMT_RAW))

2301

1425

# Verify the self signature in the key

2302

1426

crtverify = ctypes.c_uint()

2303

gnutls.openpgp_crt_verify_self(crt, 0,

2304

ctypes.byref(crtverify))

1427

(gnutls.library.functions

1428

.gnutls_openpgp_crt_verify_self(crt, 0,

1429

ctypes.byref(crtverify)))

2305

1430

if crtverify.value != 0:

2306

gnutls.openpgp_crt_deinit(crt)

2307

raise gnutls.CertificateSecurityError("Verify failed")

1431

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1432

raise (gnutls.errors.CertificateSecurityError

1433

("Verify failed"))

2308

1434

# New buffer for the fingerprint

2309

1435

buf = ctypes.create_string_buffer(20)

2310

1436

buf_len = ctypes.c_size_t()

2311

1437

# Get the fingerprint from the certificate into the buffer

2312

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

2313

ctypes.byref(buf_len))

1438

(gnutls.library.functions

1439

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

1440

ctypes.byref(buf_len)))

2314

1441

# Deinit the certificate

2315

gnutls.openpgp_crt_deinit(crt)

1442

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2316

1443

# Convert the buffer to a Python bytestring

2317

1444

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

2318

1445

# Convert the bytestring to hexadecimal notation

2319

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

1446

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

2320

1447

return hex_fpr

2321

1448

2322

1449

2323

1450

class MultiprocessingMixIn(object):

2324

1451

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

2325

2326

1452

def sub_process_main(self, request, address):

2327

1453

try:

2328

1454

self.finish_request(request, address)

2329

except Exception:

1455

except:

2330

1456

self.handle_error(request, address)

2331

1457

self.close_request(request)

2332

1458

2333

1459

def process_request(self, request, address):

2334

1460

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

2335

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

2336

args = (request, address))

2337

proc.start()

2338

return proc

1461

multiprocessing.Process(target = self.sub_process_main,

1462

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

2339

1463

2340

1464

2341

1465

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2342

1466

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

2343

2344

1467

def process_request(self, request, client_address):

2345

1468

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

2346

1469

2348

1471

"""

2349

1472

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2350

1473

2351

proc = MultiprocessingMixIn.process_request(self, request,

2352

client_address)

1474

super(MultiprocessingMixInWithPipe,

1475

self).process_request(request, client_address)

2353

1476

self.child_pipe.close()

2354

self.add_pipe(parent_pipe, proc)

1477

self.add_pipe(parent_pipe)

2355

1478

2356

def add_pipe(self, parent_pipe, proc):

1479

def add_pipe(self, parent_pipe):

2357

1480

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

2358

raise NotImplementedError()

1481

raise NotImplementedError

2359

1482

2360

1483

2361

1484

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2367

1490

interface: None or a network interface name (string)

2368

1491

use_ipv6: Boolean; to use IPv6 or not

2369

1492

"""

2370

2371

1493

def __init__(self, server_address, RequestHandlerClass,

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

"""

1494

interface=None, use_ipv6=True):

2378

1495

self.interface = interface

2379

1496

if use_ipv6:

2380

1497

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.

2407

1498

socketserver.TCPServer.__init__(self, server_address,

2408

1499

RequestHandlerClass)

2409

2410

1500

def server_bind(self):

2411

1501

"""This overrides the normal server_bind() function

2412

1502

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

2418

1508

self.interface)

2419

1509

else:

2420

1510

try:

2421

self.socket.setsockopt(

2422

socket.SOL_SOCKET, SO_BINDTODEVICE,

2423

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

1511

self.socket.setsockopt(socket.SOL_SOCKET,

1512

SO_BINDTODEVICE,

1513

str(self.interface

1514

+ '\0'))

2424

1515

except socket.error as error:

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:

1516

if error[0] == errno.EPERM:

1517

logger.error("No permission to"

1518

" bind to interface %s",

1519

self.interface)

1520

elif error[0] == errno.ENOPROTOOPT:

2429

1521

logger.error("SO_BINDTODEVICE not available;"

2430

1522

" cannot bind to interface %s",

2431

1523

self.interface)

2432

elif error.errno == errno.ENODEV:

2433

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

2434

" cannot bind", self.interface)

2435

1524

else:

2436

1525

raise

2437

1526

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

2440

1529

if self.address_family == socket.AF_INET6:

2441

1530

any_address = "::" # in6addr_any

2442

1531

else:

2443

any_address = "0.0.0.0" # INADDR_ANY

1532

any_address = socket.INADDR_ANY

2444

1533

self.server_address = (any_address,

2445

1534

self.server_address[1])

2446

1535

elif not self.server_address[1]:

2447

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

1536

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

1537

0)

2448

1538

# if self.interface:

2449

1539

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

2450

1540

# 0, # port

2462

1552

gnutls_priority GnuTLS priority string

2463

1553

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

2464

1554

2465

Assumes a GObject.MainLoop event loop.

1555

Assumes a gobject.MainLoop event loop.

2466

1556

"""

2467

2468

1557

def __init__(self, server_address, RequestHandlerClass,

2469

interface=None,

2470

use_ipv6=True,

2471

clients=None,

2472

gnutls_priority=None,

2473

use_dbus=True,

2474

socketfd=None):

1558

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

1559

gnutls_priority=None, use_dbus=True):

2475

1560

self.enabled = False

2476

1561

self.clients = clients

2477

1562

if self.clients is None:

2478

self.clients = {}

1563

self.clients = set()

2479

1564

self.use_dbus = use_dbus

2480

1565

self.gnutls_priority = gnutls_priority

2481

1566

IPv6_TCPServer.__init__(self, server_address,

2482

1567

RequestHandlerClass,

2483

1568

interface = interface,

2484

use_ipv6 = use_ipv6,

2485

socketfd = socketfd)

2486

1569

use_ipv6 = use_ipv6)

2487

1570

def server_activate(self):

2488

1571

if self.enabled:

2489

1572

return socketserver.TCPServer.server_activate(self)

2490

2491

1573

def enable(self):

2492

1574

self.enabled = True

2493

2494

def add_pipe(self, parent_pipe, proc):

1575

def add_pipe(self, parent_pipe):

2495

1576

# Call "handle_ipc" for both data and EOF events

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,

1577

gobject.io_add_watch(parent_pipe.fileno(),

1578

gobject.IO_IN | gobject.IO_HUP,

1579

functools.partial(self.handle_ipc,

1580

parent_pipe = parent_pipe))

1581

1582

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

2506

1583

client_object=None):

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()

1584

condition_names = {

1585

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

1586

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

1587

# blocking).

1588

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

1589

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

1590

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

1591

# broken, usually for pipes and

1592

# sockets).

1593

}

1594

conditions_string = ' | '.join(name

1595

for cond, name in

1596

condition_names.iteritems()

1597

if cond & condition)

1598

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

1599

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

2511

1600

return False

2512

1601

2513

1602

# Read a request from the child

2518

1607

fpr = request[1]

2519

1608

address = request[2]

2520

1609

2521

for c in self.clients.itervalues():

1610

for c in self.clients:

2522

1611

if c.fingerprint == fpr:

2523

1612

client = c

2524

1613

break

2527

1616

"dress: %s", fpr, address)

2528

1617

if self.use_dbus:

2529

1618

# Emit D-Bus signal

2530

mandos_dbus_service.ClientNotFound(fpr,

2531

address[0])

1619

mandos_dbus_service.ClientNotFound(fpr, address[0])

2532

1620

parent_pipe.send(False)

2533

1621

return False

2534

1622

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))

1623

gobject.io_add_watch(parent_pipe.fileno(),

1624

gobject.IO_IN | gobject.IO_HUP,

1625

functools.partial(self.handle_ipc,

1626

parent_pipe = parent_pipe,

1627

client_object = client))

2542

1628

parent_pipe.send(True)

2543

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

2544

# same fileno

1629

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

2545

1630

return False

2546

1631

if command == 'funcall':

2547

1632

funcname = request[1]

2548

1633

args = request[2]

2549

1634

kwargs = request[3]

2550

1635

2551

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

2552

funcname)(*args,

2553

**kwargs)))

1636

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

2554

1637

2555

1638

if command == 'getattr':

2556

1639

attrname = request[1]

2557

if isinstance(client_object.__getattribute__(attrname),

2558

collections.Callable):

2559

parent_pipe.send(('function', ))

1640

if callable(client_object.__getattribute__(attrname)):

1641

parent_pipe.send(('function',))

2560

1642

else:

2561

parent_pipe.send((

2562

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

1643

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

2563

1644

2564

1645

if command == 'setattr':

2565

1646

attrname = request[1]

2569

1650

return True

2570

1651

2571

1652

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

2668

1653

def string_to_delta(interval):

2669

1654

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

2670

1655

2681

1666

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

2682

1667

datetime.timedelta(0, 330)

2683

1668

"""

2684

2685

try:

2686

return rfc3339_duration_to_delta(interval)

2687

except ValueError:

2688

pass

2689

2690

1669

timevalue = datetime.timedelta(0)

2691

1670

for s in interval.split():

2692

1671

try:

2693

suffix = s[-1]

1672

suffix = unicode(s[-1])

2694

1673

value = int(s[:-1])

2695

1674

if suffix == "d":

2696

1675

delta = datetime.timedelta(value)

2703

1682

elif suffix == "w":

2704

1683

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

2705

1684

else:

2706

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

2707

except IndexError as e:

1685

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

1686

except (ValueError, IndexError) as e:

2708

1687

raise ValueError(*(e.args))

2709

1688

timevalue += delta

2710

1689

return timevalue

2711

1690

2712

1691

1692

def if_nametoindex(interface):

1693

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

1694

1695

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

1696

global if_nametoindex

1697

try:

1698

if_nametoindex = (ctypes.cdll.LoadLibrary

1699

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

1700

.if_nametoindex)

1701

except (OSError, AttributeError):

1702

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

1703

def if_nametoindex(interface):

1704

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

1705

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

1706

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

1707

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1708

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

1709

interface))

1710

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

1711

ifreq[16:20])[0]

1712

return interface_index

1713

return if_nametoindex(interface)

1714

1715

2713

1716

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

2714

1717

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

2715

1718

2723

1726

sys.exit()

2724

1727

if not noclose:

2725

1728

# Close all standard open file descriptors

2726

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

1729

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

2727

1730

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

2728

1731

raise OSError(errno.ENODEV,

2729

"{} not a character device"

2730

.format(os.devnull))

1732

"%s not a character device"

1733

% os.path.devnull)

2731

1734

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

2732

1735

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

2733

1736

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

2742

1745

2743

1746

parser = argparse.ArgumentParser()

2744

1747

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

2745

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

1748

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

2746

1749

help="show version number and exit")

2747

1750

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

2748

1751

help="Bind to interface IF")

2754

1757

help="Run self-test")

2755

1758

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

2756

1759

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

2757

" to terminal", default=None)

1760

" to terminal")

2758

1761

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

2759

1762

help="Debug level for stdout output")

2760

1763

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

2767

1770

" files")

2768

1771

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

2769

1772

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

2770

" system bus interface", default=None)

1773

" system bus interface")

2771

1774

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

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

1775

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

2788

1776

options = parser.parse_args()

2789

1777

2790

1778

if options.check:

2791

1779

import doctest

2792

fail_count, test_count = doctest.testmod()

2793

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

1780

doctest.testmod()

1781

sys.exit()

2794

1782

2795

1783

# Default values for config file for server-global settings

2796

1784

server_defaults = { "interface": "",

2798

1786

"port": "",

2799

1787

"debug": "False",

2800

1788

"priority":

2801

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

2802

":+SIGN-DSA-SHA256",

1789

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

2803

1790

"servicename": "Mandos",

2804

1791

"use_dbus": "True",

2805

1792

"use_ipv6": "True",

2806

1793

"debuglevel": "",

2807

"restore": "True",

2808

"socket": "",

2809

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

2810

"foreground": "False",

2811

"zeroconf": "True",

2812

}

1794

}

2813

1795

2814

1796

# Parse config file for server-global settings

2815

1797

server_config = configparser.SafeConfigParser(server_defaults)

2816

1798

del server_defaults

2817

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

1799

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

1800

"mandos.conf"))

2818

1801

# Convert the SafeConfigParser object to a dict

2819

1802

server_settings = server_config.defaults()

2820

1803

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

2821

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

1804

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

2822

1805

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

2823

1806

option)

2824

1807

if server_settings["port"]:

2825

1808

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

2826

1809

"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"])

2836

1810

del server_config

2837

1811

2838

1812

# Override the settings from the config file with command line

2839

1813

# options, if set.

2840

1814

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

2841

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

2842

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

2843

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

1815

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

1816

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

2844

1817

value = getattr(options, option)

2845

1818

if value is not None:

2846

1819

server_settings[option] = value

2847

1820

del options

2848

1821

# Force all strings to be unicode

2849

1822

for option in server_settings.keys():

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

1823

if type(server_settings[option]) is str:

1824

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

2860

1825

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

2861

1826

2862

1827

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

2863

1828

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

2869

1829

# For convenience

2870

1830

debug = server_settings["debug"]

2871

1831

debuglevel = server_settings["debuglevel"]

2872

1832

use_dbus = server_settings["use_dbus"]

2873

1833

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)

2887

1834

2888

1835

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

2889

syslogger.setFormatter(

2890

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

2891

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

2892

server_settings["servicename"])))

1836

syslogger.setFormatter(logging.Formatter

1837

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

1838

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

1839

% server_settings["servicename"]))

2893

1840

2894

1841

# Parse config file with clients

2895

client_config = configparser.SafeConfigParser(Client

2896

.client_defaults)

1842

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

1843

"extended_timeout": "15m",

1844

"interval": "2m",

1845

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

1846

"host": "",

1847

"approval_delay": "0s",

1848

"approval_duration": "1s",

1849

}

1850

client_config = configparser.SafeConfigParser(client_defaults)

2897

1851

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

2898

1852

"clients.conf"))

2899

1853

2900

1854

global mandos_dbus_service

2901

1855

mandos_dbus_service = None

2902

1856

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

1857

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

1858

server_settings["port"]),

1859

ClientHandler,

1860

interface=(server_settings["interface"]

1861

or None),

1862

use_ipv6=use_ipv6,

1863

gnutls_priority=

1864

server_settings["priority"],

1865

use_dbus=use_dbus)

1866

if not debug:

1867

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

2919

1868

try:

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)

1869

pidfile = open(pidfilename, "w")

1870

except IOError:

1871

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

2924

1872

2925

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

2926

("mandos", "mandos"),

2927

("nobody", "nogroup")):

1873

try:

1874

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

1875

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

1876

except KeyError:

2928

1877

try:

2929

uid = pwd.getpwnam(name).pw_uid

2930

gid = pwd.getpwnam(group).pw_gid

2931

break

1878

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

1879

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

2932

1880

except KeyError:

2933

continue

2934

else:

2935

uid = 65534

2936

gid = 65534

1881

try:

1882

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

1883

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

1884

except KeyError:

1885

uid = 65534

1886

gid = 65534

2937

1887

try:

2938

1888

os.setgid(gid)

2939

1889

os.setuid(uid)

2940

1890

except OSError as error:

2941

if error.errno != errno.EPERM:

2942

raise

1891

if error[0] != errno.EPERM:

1892

raise error

1893

1894

if not debug and not debuglevel:

1895

syslogger.setLevel(logging.WARNING)

1896

console.setLevel(logging.WARNING)

1897

if debuglevel:

1898

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

1899

syslogger.setLevel(level)

1900

console.setLevel(level)

2943

1901

2944

1902

if debug:

2945

1903

# Enable all possible GnuTLS debugging

2946

1904

2947

1905

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

2948

1906

# - GnuTLS manual

2949

gnutls.global_set_log_level(11)

1907

gnutls.library.functions.gnutls_global_set_log_level(11)

2950

1908

2951

@gnutls.log_func

1909

@gnutls.library.types.gnutls_log_func

2952

1910

def debug_gnutls(level, string):

2953

1911

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

2954

1912

2955

gnutls.global_set_log_function(debug_gnutls)

1913

(gnutls.library.functions

1914

.gnutls_global_set_log_function(debug_gnutls))

2956

1915

2957

1916

# Redirect stdin so all checkers get /dev/null

2958

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

1917

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

2959

1918

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

2960

1919

if null > 2:

2961

1920

os.close(null)

1921

else:

1922

# No console logging

1923

logger.removeHandler(console)

2962

1924

2963

1925

# Need to fork before connecting to D-Bus

2964

if not foreground:

1926

if not debug:

2965

1927

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

2966

1928

daemon()

2967

1929

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

2972

1930

global main_loop

2973

1931

# From the Avahi example code

2974

DBusGMainLoop(set_as_default=True)

2975

main_loop = GObject.MainLoop()

1932

DBusGMainLoop(set_as_default=True )

1933

main_loop = gobject.MainLoop()

2976

1934

bus = dbus.SystemBus()

2977

1935

# End of Avahi example code

2978

1936

if use_dbus:

2979

1937

try:

2980

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

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)

1938

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

1939

bus, do_not_queue=True)

1940

bus_name2 = dbus.service.BusName("se.recompile.Mandos",

1941

bus, do_not_queue=True)

1942

except dbus.exceptions.NameExistsException as e:

1943

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

2988

1944

use_dbus = False

2989

1945

server_settings["use_dbus"] = False

2990

1946

tcp_server.use_dbus = False

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"))

1947

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1948

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

1949

servicetype = "_mandos._tcp",

1950

protocol = protocol, bus = bus)

1951

if server_settings["interface"]:

1952

service.interface = (if_nametoindex

1953

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

3001

1954

3002

1955

global multiprocessing_manager

3003

1956

multiprocessing_manager = multiprocessing.Manager()

3004

1957

3005

1958

client_class = Client

3006

1959

if use_dbus:

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))

1960

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

1961

def client_config_items(config, section):

1962

special_settings = {

1963

"approved_by_default":

1964

lambda: config.getboolean(section,

1965

"approved_by_default"),

1966

}

1967

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

3092

1968

try:

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

1969

yield (name, special_settings[name]())

1970

except KeyError:

1971

yield (name, value)

1972

1973

tcp_server.clients.update(set(

1974

client_class(name = section,

1975

config= dict(client_config_items(

1976

client_config, section)))

1977

for section in client_config.sections()))

3118

1978

if not tcp_server.clients:

3119

1979

logger.warning("No clients defined")

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

1980

1981

if not debug:

1982

try:

1983

with pidfile:

1984

pid = os.getpid()

1985

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

1986

del pidfile

1987

except IOError:

1988

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

1989

pidfilename, pid)

1990

except NameError:

1991

# "pidfile" was never created

1992

pass

3131

1993

del pidfilename

1994

1995

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

3132

1996

3133

1997

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

3134

1998

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

3135

1999

3136

2000

if use_dbus:

3137

3138

@alternate_dbus_interfaces(

3139

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

3140

class MandosDBusService(DBusObjectWithObjectManager):

2001

class MandosDBusService(dbus.service.Object):

3141

2002

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

3142

3143

2003

def __init__(self):

3144

2004

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

3145

3146

_interface = "se.recompile.Mandos"

2005

_interface = "se.bsnet.fukt.Mandos"

3147

2006

3148

2007

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

3149

2008

def ClientAdded(self, objpath):

3155

2014

"D-Bus signal"

3156

2015

pass

3157

2016

3158

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

3159

"true"})

3160

2017

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

3161

2018

def ClientRemoved(self, objpath, name):

3162

2019

"D-Bus signal"

3163

2020

pass

3164

2021

3165

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

3166

"true"})

3167

2022

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

3168

2023

def GetAllClients(self):

3169

2024

"D-Bus method"

3170

return dbus.Array(c.dbus_object_path for c in

3171

tcp_server.clients.itervalues())

2025

return dbus.Array(c.dbus_object_path

2026

for c in tcp_server.clients)

3172

2027

3173

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

3174

"true"})

3175

2028

@dbus.service.method(_interface,

3176

2029

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

3177

2030

def GetAllClientsWithProperties(self):

3178

2031

"D-Bus method"

3179

2032

return dbus.Dictionary(

3180

{ c.dbus_object_path: c.GetAll(

3181

"se.recompile.Mandos.Client")

3182

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

2033

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

2034

for c in tcp_server.clients),

3183

2035

signature="oa{sv}")

3184

2036

3185

2037

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

3186

2038

def RemoveClient(self, object_path):

3187

2039

"D-Bus method"

3188

for c in tcp_server.clients.itervalues():

2040

for c in tcp_server.clients:

3189

2041

if c.dbus_object_path == object_path:

3190

del tcp_server.clients[c.name]

2042

tcp_server.clients.remove(c)

3191

2043

c.remove_from_connection()

3192

# Don't signal the disabling

2044

# Don't signal anything except ClientRemoved

3193

2045

c.disable(quiet=True)

3194

# Emit D-Bus signal for removal

3195

self.client_removed_signal(c)

2046

# Emit D-Bus signal

2047

self.ClientRemoved(object_path, c.name)

3196

2048

return

3197

2049

raise KeyError(object_path)

3198

2050

3199

2051

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)

3236

2052

3237

mandos_dbus_service = MandosDBusService()

2053

class MandosDBusServiceTransitional(MandosDBusService):

2054

__metaclass__ = transitional_dbus_metaclass

2055

mandos_dbus_service = MandosDBusServiceTransitional()

3238

2056

3239

2057

def cleanup():

3240

2058

"Cleanup function; run on exit"

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

2059

service.cleanup()

2060

3302

2061

while tcp_server.clients:

3303

name, client = tcp_server.clients.popitem()

2062

client = tcp_server.clients.pop()

3304

2063

if use_dbus:

3305

2064

client.remove_from_connection()

3306

# Don't signal the disabling

2065

client.disable_hook = None

2066

# Don't signal anything except ClientRemoved

3307

2067

client.disable(quiet=True)

3308

# Emit D-Bus signal for removal

3309

2068

if use_dbus:

3310

mandos_dbus_service.client_removed_signal(client)

3311

client_settings.clear()

2069

# Emit D-Bus signal

2070

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2071

client.name)

3312

2072

3313

2073

atexit.register(cleanup)

3314

2074

3315

for client in tcp_server.clients.itervalues():

2075

for client in tcp_server.clients:

3316

2076

if use_dbus:

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()

2077

# Emit D-Bus signal

2078

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2079

client.enable()

3322

2080

3323

2081

tcp_server.enable()

3324

2082

tcp_server.server_activate()

3325

2083

3326

2084

# Find out what port we got

3327

if zeroconf:

3328

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

2085

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

3329

2086

if use_ipv6:

3330

2087

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

3331

" flowinfo %d, scope_id %d",

3332

*tcp_server.socket.getsockname())

2088

" flowinfo %d, scope_id %d"

2089

% tcp_server.socket.getsockname())

3333

2090

else: # IPv4

3334

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

3335

*tcp_server.socket.getsockname())

2091

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

2092

% tcp_server.socket.getsockname())

3336

2093

3337

2094

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

3338

2095

3339

2096

try:

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

2097

# From the Avahi example code

2098

try:

2099

service.activate()

2100

except dbus.exceptions.DBusException as error:

2101

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

2102

cleanup()

2103

sys.exit(1)

2104

# End of Avahi example code

3349

2105

3350

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

2106

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

3351

2107

lambda *args, **kwargs:

3352

2108

(tcp_server.handle_request

3353

2109

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

3355

2111

logger.debug("Starting main loop")

3356

2112

main_loop.run()

3357

2113

except AvahiError as error:

3358

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

2114

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

3359

2115

cleanup()

3360

2116

sys.exit(1)

3361

2117

except KeyboardInterrupt: