/mandos/release : revision 237.7.370

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

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#

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# Everything else is

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#

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

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

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# along with this program. If not, see

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

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#

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

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

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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import SocketServer as socketserver

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from future_builtins import *

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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import gobject

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try:

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from gi.repository import GObject

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except ImportError:

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import gobject as GObject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.3.0"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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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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112

def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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

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return interface_index

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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class AvahiError(Exception):

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

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self.value = value

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

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def __unicode__(self):

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return unicode(repr(self.value))

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

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**kwargs)

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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def rename(self, remove=True):

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

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if self.rename_count >= self.max_renames:

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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

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self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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self.remove()

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if remove:

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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if (error.get_dbus_name()

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

323

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

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return self.rename(remove=False)

325

else:

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

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self.cleanup()

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os._exit(1)

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def remove(self):

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

179

if self.group is not None:

180

try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException) as e:

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pass

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self.group = None

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match.remove()

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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"""

191

340

self.remove()

192

self.group = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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self.server.EntryGroupNew(),

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follow_name_owner_changes=True),

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

341

if self.group is None:

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self.group = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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self.server.EntryGroupNew()),

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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))

348

'StateChanged', self.entry_group_state_changed))

200

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

201

350

self.name, self.type)

202

351

self.group.AddService(

208

357

dbus.UInt16(self.port),

209

358

avahi.string_array_to_txt_array(self.TXT))

210

359

self.group.Commit()

360

211

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def entry_group_state_changed(self, state, error):

212

362

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

213

363

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

219

369

self.rename()

220

370

elif state == avahi.ENTRY_GROUP_FAILURE:

221

371

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

222

unicode(error))

223

raise AvahiGroupError("State changed: %s"

224

% unicode(error))

372

str(error))

373

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

374

225

375

def cleanup(self):

226

376

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

377

if self.group is not None:

378

try:

379

self.group.Free()

380

except (dbus.exceptions.UnknownMethodException,

381

dbus.exceptions.DBusException):

382

pass

383

self.group = None

227

384

self.remove()

385

228

386

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

229

387

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

230

388

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

231

bad_states = { avahi.SERVER_INVALID:

232

"Zeroconf server invalid",

233

avahi.SERVER_REGISTERING: None,

234

avahi.SERVER_COLLISION:

235

"Zeroconf server name collision",

236

avahi.SERVER_FAILURE:

237

"Zeroconf server failure" }

389

bad_states = {

390

avahi.SERVER_INVALID: "Zeroconf server invalid",

391

avahi.SERVER_REGISTERING: None,

392

avahi.SERVER_COLLISION: "Zeroconf server name collision",

393

avahi.SERVER_FAILURE: "Zeroconf server failure",

394

}

238

395

if state in bad_states:

239

if bad_states[state]:

240

logger.error(bad_states[state])

241

self.remove()

396

if bad_states[state] is not None:

397

if error is None:

398

logger.error(bad_states[state])

399

else:

400

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

401

self.cleanup()

242

402

elif state == avahi.SERVER_RUNNING:

243

self.add()

403

try:

404

self.add()

405

except dbus.exceptions.DBusException as error:

406

if (error.get_dbus_name()

407

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

408

logger.info("Local Zeroconf service name"

409

" collision.")

410

return self.rename(remove=False)

411

else:

412

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

413

self.cleanup()

414

os._exit(1)

244

415

else:

245

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

416

if error is None:

417

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

418

else:

419

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

420

246

421

def activate(self):

247

422

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

248

423

if self.server is None:

252

427

follow_name_owner_changes=True),

253

428

avahi.DBUS_INTERFACE_SERVER)

254

429

self.server.connect_to_signal("StateChanged",

255

self.server_state_changed)

430

self.server_state_changed)

256

431

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

257

432

258

433

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

259

708

class Client(object):

260

709

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

261

710

262

711

Attributes:

263

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

712

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

264

713

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

265

714

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

266

715

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

267

716

to see if the client lives.

268

717

'None' if no process is running.

269

checker_callback_tag: a gobject event source tag, or None

718

checker_callback_tag: a GObject event source tag, or None

270

719

checker_command: string; External command which is run to check

271

720

if client lives. %() expansions are done at

272

721

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

273

722

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

274

checker_initiator_tag: a gobject event source tag, or None

723

checker_initiator_tag: a GObject event source tag, or None

275

724

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

725

client_structure: Object describing what attributes a client has

726

and is used for storing the client at exit

276

727

current_checker_command: string; current running checker_command

277

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

278

disable_initiator_tag: a gobject event source tag, or None

728

disable_initiator_tag: a GObject event source tag, or None

279

729

enabled: bool()

280

730

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

281

731

uniquely identify the client

283

733

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

284

734

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

285

735

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

286

last_enabled: datetime.datetime(); (UTC)

736

last_checker_status: integer between 0 and 255 reflecting exit

737

status of last checker. -1 reflects crashed

738

checker, -2 means no checker completed yet.

739

last_checker_signal: The signal which killed the last checker, if

740

last_checker_status is -1

741

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

287

742

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

288

743

D-Bus identifiers

289

744

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

290

745

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

291

746

until this client is disabled

747

extended_timeout: extra long timeout when secret has been sent

292

748

runtime_expansions: Allowed attributes for runtime expansion.

749

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

750

disabled, or None

751

server_settings: The server_settings dict from main()

293

752

"""

294

753

295

754

runtime_expansions = ("approval_delay", "approval_duration",

296

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

297

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

755

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

756

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

757

"last_approval_request", "last_checked_ok",

298

758

"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

}

299

770

300

771

@staticmethod

301

def _timedelta_to_milliseconds(td):

302

"Convert a datetime.timedelta() to milliseconds"

303

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

304

+ (td.seconds * 1000)

305

+ (td.microseconds // 1000))

306

307

def timeout_milliseconds(self):

308

"Return the 'timeout' attribute in milliseconds"

309

return self._timedelta_to_milliseconds(self.timeout)

310

311

def interval_milliseconds(self):

312

"Return the 'interval' attribute in milliseconds"

313

return self._timedelta_to_milliseconds(self.interval)

314

315

def approval_delay_milliseconds(self):

316

return self._timedelta_to_milliseconds(self.approval_delay)

317

318

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

319

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

320

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

321

attribute."""

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):

322

822

self.name = name

323

if config is None:

324

config = {}

823

if server_settings is None:

824

server_settings = {}

825

self.server_settings = server_settings

826

# adding all client settings

827

for setting, value in settings.items():

828

setattr(self, setting, value)

829

830

if self.enabled:

831

if not hasattr(self, "last_enabled"):

832

self.last_enabled = datetime.datetime.utcnow()

833

if not hasattr(self, "expires"):

834

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

835

+ self.timeout)

836

else:

837

self.last_enabled = None

838

self.expires = None

839

325

840

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

326

# Uppercase and remove spaces from fingerprint for later

327

# comparison purposes with return value from the fingerprint()

328

# function

329

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

330

.replace(" ", ""))

331

841

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

332

if "secret" in config:

333

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

334

elif "secfile" in config:

335

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

336

(config["secfile"])),

337

"rb") as secfile:

338

self.secret = secfile.read()

339

else:

340

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

341

% self.name)

342

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

343

self.created = datetime.datetime.utcnow()

344

self.enabled = False

345

self.last_approval_request = None

346

self.last_enabled = None

347

self.last_checked_ok = None

348

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

349

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

350

self.disable_hook = disable_hook

842

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

843

datetime.datetime.utcnow())

844

845

# attributes specific for this server instance

351

846

self.checker = None

352

847

self.checker_initiator_tag = None

353

848

self.disable_initiator_tag = None

354

849

self.checker_callback_tag = None

355

self.checker_command = config["checker"]

356

850

self.current_checker_command = None

357

self.last_connect = None

358

self._approved = None

359

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

360

True)

851

self.approved = None

361

852

self.approvals_pending = 0

362

self.approval_delay = string_to_delta(

363

config["approval_delay"])

364

self.approval_duration = string_to_delta(

365

config["approval_duration"])

366

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

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)

367

864

865

# Send notice to process children that client state has changed

368

866

def send_changedstate(self):

369

self.changedstate.acquire()

370

self.changedstate.notify_all()

371

self.changedstate.release()

372

867

with self.changedstate:

868

self.changedstate.notify_all()

869

373

870

def enable(self):

374

871

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

375

872

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

376

873

# Already enabled

377

874

return

378

self.send_changedstate()

875

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

876

self.enabled = True

379

877

self.last_enabled = datetime.datetime.utcnow()

380

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

381

# and every interval from then on.

382

self.checker_initiator_tag = (gobject.timeout_add

383

(self.interval_milliseconds(),

384

self.start_checker))

385

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

386

self.disable_initiator_tag = (gobject.timeout_add

387

(self.timeout_milliseconds(),

388

self.disable))

389

self.enabled = True

390

# Also start a new checker *right now*.

391

self.start_checker()

878

self.init_checker()

879

self.send_changedstate()

392

880

393

881

def disable(self, quiet=True):

394

882

"""Disable this client."""

395

883

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

396

884

return False

397

885

if not quiet:

398

self.send_changedstate()

399

if not quiet:

400

886

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

401

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

402

gobject.source_remove(self.disable_initiator_tag)

887

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

888

GObject.source_remove(self.disable_initiator_tag)

403

889

self.disable_initiator_tag = None

404

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

405

gobject.source_remove(self.checker_initiator_tag)

890

self.expires = None

891

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

892

GObject.source_remove(self.checker_initiator_tag)

406

893

self.checker_initiator_tag = None

407

894

self.stop_checker()

408

if self.disable_hook:

409

self.disable_hook(self)

410

895

self.enabled = False

411

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

896

if not quiet:

897

self.send_changedstate()

898

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

412

899

return False

413

900

414

901

def __del__(self):

415

self.disable_hook = None

416

902

self.disable()

417

903

418

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

904

def init_checker(self):

905

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

906

# and every interval from then on.

907

if self.checker_initiator_tag is not None:

908

GObject.source_remove(self.checker_initiator_tag)

909

self.checker_initiator_tag = GObject.timeout_add(

910

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

911

self.start_checker)

912

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

913

if self.disable_initiator_tag is not None:

914

GObject.source_remove(self.disable_initiator_tag)

915

self.disable_initiator_tag = GObject.timeout_add(

916

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

917

# Also start a new checker *right now*.

918

self.start_checker()

919

920

def checker_callback(self, source, condition, connection,

921

command):

419

922

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

420

923

self.checker_callback_tag = None

421

924

self.checker = None

422

if os.WIFEXITED(condition):

423

exitstatus = os.WEXITSTATUS(condition)

424

if exitstatus == 0:

925

# Read return code from connection (see call_pipe)

926

returncode = connection.recv()

927

connection.close()

928

929

if returncode >= 0:

930

self.last_checker_status = returncode

931

self.last_checker_signal = None

932

if self.last_checker_status == 0:

425

933

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

426

934

vars(self))

427

935

self.checked_ok()

428

936

else:

429

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

430

vars(self))

937

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

431

938

else:

939

self.last_checker_status = -1

940

self.last_checker_signal = -returncode

432

941

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

433

942

vars(self))

943

return False

434

944

435

945

def checked_ok(self):

436

"""Bump up the timeout for this client.

437

438

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

439

alive and well.

440

"""

946

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

441

947

self.last_checked_ok = datetime.datetime.utcnow()

442

gobject.source_remove(self.disable_initiator_tag)

443

self.disable_initiator_tag = (gobject.timeout_add

444

(self.timeout_milliseconds(),

445

self.disable))

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."""

954

if timeout is None:

955

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

446

963

447

964

def need_approval(self):

448

965

self.last_approval_request = datetime.datetime.utcnow()

453

970

If a checker already exists, leave it running and do

454

971

nothing."""

455

972

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

456

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

457

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

458

# client would inevitably timeout, since no checker would get

459

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

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

460

977

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

461

978

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

462

979

# should be.

463

980

464

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

465

try:

466

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

467

except (AttributeError, OSError) as error:

468

if (isinstance(error, OSError)

469

and error.errno != errno.ECHILD):

470

raise error

471

else:

472

if pid:

473

logger.warning("Checker was a zombie")

474

gobject.source_remove(self.checker_callback_tag)

475

self.checker_callback(pid, status,

476

self.current_checker_command)

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

477

985

# Start a new checker if needed

478

986

if self.checker is None:

987

# Escape attributes for the shell

988

escaped_attrs = {

989

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

990

for attr in self.runtime_expansions }

479

991

try:

480

# In case checker_command has exactly one % operator

481

command = self.checker_command % self.host

482

except TypeError:

483

# Escape attributes for the shell

484

escaped_attrs = dict(

485

(attr,

486

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

487

errors=

488

'replace')))

489

for attr in

490

self.runtime_expansions)

491

492

try:

493

command = self.checker_command % escaped_attrs

494

except TypeError as error:

495

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

496

' %s', self.checker_command, error)

497

return True # Try again later

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

498

998

self.current_checker_command = command

499

try:

500

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

501

command, self.name)

502

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

503

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

504

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

505

# always replaced by /dev/null.)

506

self.checker = subprocess.Popen(command,

507

close_fds=True,

508

shell=True, cwd="/")

509

self.checker_callback_tag = (gobject.child_watch_add

510

(self.checker.pid,

511

self.checker_callback,

512

data=command))

513

# The checker may have completed before the gobject

514

# watch was added. Check for this.

515

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

516

if pid:

517

gobject.source_remove(self.checker_callback_tag)

518

self.checker_callback(pid, status, command)

519

except OSError as error:

520

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

521

error)

522

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

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

523

1025

return True

524

1026

525

1027

def stop_checker(self):

526

1028

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

527

1029

if self.checker_callback_tag:

528

gobject.source_remove(self.checker_callback_tag)

1030

GObject.source_remove(self.checker_callback_tag)

529

1031

self.checker_callback_tag = None

530

1032

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

531

1033

return

532

1034

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

533

try:

534

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

535

#time.sleep(0.5)

536

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

537

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

538

except OSError as error:

539

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

540

raise

1035

self.checker.terminate()

541

1036

self.checker = None

542

1037

543

def dbus_service_property(dbus_interface, signature="v",

544

access="readwrite", byte_arrays=False):

1038

1039

def dbus_service_property(dbus_interface,

1040

signature="v",

1041

access="readwrite",

1042

byte_arrays=False):

545

1043

"""Decorators for marking methods of a DBusObjectWithProperties to

546

1044

become properties on the D-Bus.

547

1045

556

1054

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

557

1055

if byte_arrays and signature != "ay":

558

1056

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

559

" signature %r" % signature)

1057

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

1058

560

1059

def decorator(func):

561

1060

func._dbus_is_property = True

562

1061

func._dbus_interface = dbus_interface

567

1066

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

568

1067

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

569

1068

return func

1069

1070

return decorator

1071

1072

1073

def dbus_interface_annotations(dbus_interface):

1074

"""Decorator for marking functions returning interface annotations

1075

1076

Usage:

1077

1078

@dbus_interface_annotations("org.example.Interface")

1079

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

1080

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

1081

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

1082

"false"}

1083

"""

1084

1085

def decorator(func):

1086

func._dbus_is_interface = True

1087

func._dbus_interface = dbus_interface

1088

func._dbus_name = dbus_interface

1089

return func

1090

1091

return decorator

1092

1093

1094

def dbus_annotations(annotations):

1095

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

1096

Usage:

1097

1098

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

1099

"org.freedesktop.DBus.Property."

1100

"EmitsChangedSignal": "false"})

1101

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

1102

access="r")

1103

def Property_dbus_property(self):

1104

return dbus.Boolean(False)

1105

1106

See also the DBusObjectWithAnnotations class.

1107

"""

1108

1109

def decorator(func):

1110

func._dbus_annotations = annotations

1111

return func

1112

570

1113

return decorator

571

1114

572

1115

573

1116

class DBusPropertyException(dbus.exceptions.DBusException):

574

1117

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

575

1118

"""

576

def __unicode__(self):

577

return unicode(str(self))

1119

pass

578

1120

579

1121

580

1122

class DBusPropertyAccessException(DBusPropertyException):

589

1131

pass

590

1132

591

1133

592

class DBusObjectWithProperties(dbus.service.Object):

1134

class DBusObjectWithAnnotations(dbus.service.Object):

1135

"""A D-Bus object with annotations.

1136

1137

Classes inheriting from this can use the dbus_annotations

1138

decorator to add annotations to methods or signals.

1139

"""

1140

1141

@staticmethod

1142

def _is_dbus_thing(thing):

1143

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

1144

1145

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

1146

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

1147

"""

1148

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

1149

False)

1150

1151

def _get_all_dbus_things(self, thing):

1152

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

1153

"""

1154

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

1155

athing.__get__(self))

1156

for cls in self.__class__.__mro__

1157

for name, athing in

1158

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

1159

1160

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1161

out_signature = "s",

1162

path_keyword = 'object_path',

1163

connection_keyword = 'connection')

1164

def Introspect(self, object_path, connection):

1165

"""Overloading of standard D-Bus method.

1166

1167

Inserts annotation tags on methods and signals.

1168

"""

1169

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

1170

connection)

1171

try:

1172

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

1173

1174

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

1175

# Add annotation tags

1176

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

1177

for tag in if_tag.getElementsByTagName(typ):

1178

annots = dict()

1179

for name, prop in (self.

1180

_get_all_dbus_things(typ)):

1181

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

1182

and prop._dbus_interface

1183

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

1184

annots.update(getattr(

1185

prop, "_dbus_annotations", {}))

1186

for name, value in annots.items():

1187

ann_tag = document.createElement(

1188

"annotation")

1189

ann_tag.setAttribute("name", name)

1190

ann_tag.setAttribute("value", value)

1191

tag.appendChild(ann_tag)

1192

# Add interface annotation tags

1193

for annotation, value in dict(

1194

itertools.chain.from_iterable(

1195

annotations().items()

1196

for name, annotations

1197

in self._get_all_dbus_things("interface")

1198

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

1199

)).items():

1200

ann_tag = document.createElement("annotation")

1201

ann_tag.setAttribute("name", annotation)

1202

ann_tag.setAttribute("value", value)

1203

if_tag.appendChild(ann_tag)

1204

# Fix argument name for the Introspect method itself

1205

if (if_tag.getAttribute("name")

1206

== dbus.INTROSPECTABLE_IFACE):

1207

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

1208

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

1209

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

1210

if (arg.getAttribute("direction")

1211

== "out"):

1212

arg.setAttribute("name",

1213

"xml_data")

1214

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

1215

document.unlink()

1216

except (AttributeError, xml.dom.DOMException,

1217

xml.parsers.expat.ExpatError) as error:

1218

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

1219

exc_info=error)

1220

return xmlstring

1221

1222

1223

class DBusObjectWithProperties(DBusObjectWithAnnotations):

593

1224

"""A D-Bus object with properties.

594

1225

595

1226

Classes inheriting from this can use the dbus_service_property

596

1227

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

597

1228

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

598

1229

"""

599

1230

600

@staticmethod

601

def _is_dbus_property(obj):

602

return getattr(obj, "_dbus_is_property", False)

603

604

def _get_all_dbus_properties(self):

605

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

606

"""

607

return ((prop._dbus_name, prop)

608

for name, prop in

609

inspect.getmembers(self, self._is_dbus_property))

610

611

1231

def _get_dbus_property(self, interface_name, property_name):

612

1232

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

613

1233

property with the specified name and interface.

614

1234

"""

615

for name in (property_name,

616

property_name + "_dbus_property"):

617

prop = getattr(self, name, None)

618

if (prop is None

619

or not self._is_dbus_property(prop)

620

or prop._dbus_name != property_name

621

or (interface_name and prop._dbus_interface

622

and interface_name != prop._dbus_interface)):

623

continue

624

return prop

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):

1240

return value.__get__(self)

1241

625

1242

# No such property

626

raise DBusPropertyNotFound(self.dbus_object_path + ":"

627

+ interface_name + "."

628

+ property_name)

629

630

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

1243

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

1244

self.dbus_object_path, interface_name, property_name))

1245

1246

@classmethod

1247

def _get_all_interface_names(cls):

1248

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

1249

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

1250

"_dbus_interface", None)

1251

for x in (inspect.getmro(cls))

1252

for attr in dir(x))

1253

if name is not None)

1254

1255

@dbus.service.method(dbus.PROPERTIES_IFACE,

1256

in_signature="ss",

631

1257

out_signature="v")

632

1258

def Get(self, interface_name, property_name):

633

1259

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

651

1277

# The byte_arrays option is not supported yet on

652

1278

# signatures other than "ay".

653

1279

if prop._dbus_signature != "ay":

654

raise ValueError

655

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

656

for byte in value))

1280

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

1281

"'ay' signature {!r}"

1282

.format(prop._dbus_signature))

1283

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

1284

for byte in value))

657

1285

prop(value)

658

1286

659

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

1287

@dbus.service.method(dbus.PROPERTIES_IFACE,

1288

in_signature="s",

660

1289

out_signature="a{sv}")

661

1290

def GetAll(self, interface_name):

662

1291

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

663

1292

standard.

664

1293

665

1294

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

666

1295

"""

667

all = {}

668

for name, prop in self._get_all_dbus_properties():

1296

properties = {}

1297

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

669

1298

if (interface_name

670

1299

and interface_name != prop._dbus_interface):

671

1300

# Interface non-empty but did not match

675

1304

continue

676

1305

value = prop()

677

1306

if not hasattr(value, "variant_level"):

678

all[name] = value

1307

properties[name] = value

679

1308

continue

680

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

681

value.variant_level+1)

682

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

1309

properties[name] = type(value)(

1310

value, variant_level = value.variant_level + 1)

1311

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

1312

1313

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

1314

def PropertiesChanged(self, interface_name, changed_properties,

1315

invalidated_properties):

1316

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

1317

standard.

1318

"""

1319

pass

683

1320

684

1321

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

685

1322

out_signature="s",

686

1323

path_keyword='object_path',

687

1324

connection_keyword='connection')

688

1325

def Introspect(self, object_path, connection):

689

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

1326

"""Overloading of standard D-Bus method.

1327

1328

Inserts property tags and interface annotation tags.

690

1329

"""

691

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

692

connection)

1330

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1331

object_path,

1332

connection)

693

1333

try:

694

1334

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

1335

695

1336

def make_tag(document, name, prop):

696

1337

e = document.createElement("property")

697

1338

e.setAttribute("name", name)

698

1339

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

699

1340

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

700

1341

return e

1342

701

1343

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

1344

# Add property tags

702

1345

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

703

1346

for name, prop

704

in self._get_all_dbus_properties()

1347

in self._get_all_dbus_things("property")

705

1348

if prop._dbus_interface

706

1349

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

707

1350

if_tag.appendChild(tag)

1351

# Add annotation tags for properties

1352

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

1353

annots = dict()

1354

for name, prop in self._get_all_dbus_things(

1355

"property"):

1356

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

1357

and prop._dbus_interface

1358

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

1359

annots.update(getattr(

1360

prop, "_dbus_annotations", {}))

1361

for name, value in annots.items():

1362

ann_tag = document.createElement(

1363

"annotation")

1364

ann_tag.setAttribute("name", name)

1365

ann_tag.setAttribute("value", value)

1366

tag.appendChild(ann_tag)

708

1367

# Add the names to the return values for the

709

1368

# "org.freedesktop.DBus.Properties" methods

710

1369

if (if_tag.getAttribute("name")

725

1384

except (AttributeError, xml.dom.DOMException,

726

1385

xml.parsers.expat.ExpatError) as error:

727

1386

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

728

error)

729

return xmlstring

730

731

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):

1460

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

1461

if dt is None:

1462

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"})

732

1654

class ClientDBus(Client, DBusObjectWithProperties):

733

1655

"""A Client class using D-Bus

734

1656

738

1660

"""

739

1661

740

1662

runtime_expansions = (Client.runtime_expansions

741

+ ("dbus_object_path",))

1663

+ ("dbus_object_path", ))

1664

1665

_interface = "se.recompile.Mandos.Client"

742

1666

743

1667

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

744

1668

745

1669

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

746

self._approvals_pending = 0

747

1670

self.bus = bus

748

1671

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

749

1672

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

750

1673

# the D-Bus

751

client_object_name = unicode(self.name).translate(

1674

client_object_name = str(self.name).translate(

752

1675

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

753

1676

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

754

self.dbus_object_path = (dbus.ObjectPath

755

("/clients/" + client_object_name))

1677

self.dbus_object_path = dbus.ObjectPath(

1678

"/clients/" + client_object_name)

756

1679

DBusObjectWithProperties.__init__(self, self.bus,

757

1680

self.dbus_object_path)

758

759

def _get_approvals_pending(self):

760

return self._approvals_pending

761

def _set_approvals_pending(self, value):

762

old_value = self._approvals_pending

763

self._approvals_pending = value

764

bval = bool(value)

765

if (hasattr(self, "dbus_object_path")

766

and bval is not bool(old_value)):

767

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

768

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

769

dbus_bool)

770

771

approvals_pending = property(_get_approvals_pending,

772

_set_approvals_pending)

773

del _get_approvals_pending, _set_approvals_pending

774

775

@staticmethod

776

def _datetime_to_dbus(dt, variant_level=0):

777

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

778

return dbus.String(dt.isoformat(),

779

variant_level=variant_level)

780

781

def enable(self):

782

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

783

r = Client.enable(self)

784

if oldstate != self.enabled:

785

# Emit D-Bus signals

786

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

787

dbus.Boolean(True, variant_level=1))

788

self.PropertyChanged(

789

dbus.String("LastEnabled"),

790

self._datetime_to_dbus(self.last_enabled,

791

variant_level=1))

792

return r

793

794

def disable(self, quiet = False):

795

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

796

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

797

if not quiet and oldstate != self.enabled:

798

# Emit D-Bus signal

799

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

800

dbus.Boolean(False, variant_level=1))

801

return r

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

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

1693

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

1696

"""

1697

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

1698

1699

def setter(self, value):

1700

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)

1720

1721

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

1722

1723

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1724

approvals_pending = notifychangeproperty(dbus.Boolean,

1725

"ApprovalPending",

1726

type_func = bool)

1727

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

1728

last_enabled = notifychangeproperty(datetime_to_dbus,

1729

"LastEnabled")

1730

checker = notifychangeproperty(

1731

dbus.Boolean, "CheckerRunning",

1732

type_func = lambda checker: checker is not None)

1733

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1734

"LastCheckedOK")

1735

last_checker_status = notifychangeproperty(dbus.Int16,

1736

"LastCheckerStatus")

1737

last_approval_request = notifychangeproperty(

1738

datetime_to_dbus, "LastApprovalRequest")

1739

approved_by_default = notifychangeproperty(dbus.Boolean,

1740

"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)

1747

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)

1757

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

1758

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

1759

invalidate_only=True)

1760

1761

del notifychangeproperty

802

1762

803

1763

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

804

1764

try:

809

1769

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

810

1770

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

811

1771

812

def checker_callback(self, pid, condition, command,

813

*args, **kwargs):

814

self.checker_callback_tag = None

815

self.checker = None

816

# Emit D-Bus signal

817

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

818

dbus.Boolean(False, variant_level=1))

819

if os.WIFEXITED(condition):

820

exitstatus = os.WEXITSTATUS(condition)

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:

821

1779

# Emit D-Bus signal

822

1780

self.CheckerCompleted(dbus.Int16(exitstatus),

823

dbus.Int64(condition),

1781

# This is specific to GNU libC

1782

dbus.Int64(exitstatus << 8),

824

1783

dbus.String(command))

825

1784

else:

826

1785

# Emit D-Bus signal

827

1786

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

828

dbus.Int64(condition),

1787

dbus.Int64(

1788

# This is specific to GNU libC

1789

(exitstatus << 8)

1790

| self.last_checker_signal),

829

1791

dbus.String(command))

830

831

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

832

*args, **kwargs)

833

834

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

835

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

836

# Emit D-Bus signal

837

self.PropertyChanged(

838

dbus.String("LastCheckedOK"),

839

(self._datetime_to_dbus(self.last_checked_ok,

840

variant_level=1)))

841

842

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

843

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

844

# Emit D-Bus signal

845

self.PropertyChanged(

846

dbus.String("LastApprovalRequest"),

847

(self._datetime_to_dbus(self.last_approval_request,

848

variant_level=1)))

849

return r

1792

return ret

850

1793

851

1794

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

852

old_checker = self.checker

853

if self.checker is not None:

854

old_checker_pid = self.checker.pid

855

else:

856

old_checker_pid = None

1795

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

857

1796

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

858

1797

# Only if new checker process was started

859

1798

if (self.checker is not None

860

1799

and old_checker_pid != self.checker.pid):

861

1800

# Emit D-Bus signal

862

1801

self.CheckerStarted(self.current_checker_command)

863

self.PropertyChanged(

864

dbus.String("CheckerRunning"),

865

dbus.Boolean(True, variant_level=1))

866

1802

return r

867

1803

868

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

869

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

870

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

871

if (old_checker is not None

872

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

873

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

874

dbus.Boolean(False, variant_level=1))

875

return r

876

877

1804

def _reset_approved(self):

878

self._approved = None

1805

self.approved = None

879

1806

return False

880

1807

881

1808

def approve(self, value=True):

1809

self.approved = value

1810

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

1811

* 1000), self._reset_approved)

882

1812

self.send_changedstate()

883

self._approved = value

884

gobject.timeout_add(self._timedelta_to_milliseconds

885

(self.approval_duration),

886

self._reset_approved)

887

888

1813

889

1814

## D-Bus methods, signals & properties

890

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

1815

1816

## Interfaces

891

1817

892

1818

## Signals

893

1819

904

1830

pass

905

1831

906

1832

# PropertyChanged - signal

1833

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

907

1834

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

908

1835

def PropertyChanged(self, property, value):

909

1836

"D-Bus signal"

943

1870

self.checked_ok()

944

1871

945

1872

# Enable - method

1873

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

946

1874

@dbus.service.method(_interface)

947

1875

def Enable(self):

948

1876

"D-Bus method"

949

1877

self.enable()

950

1878

951

1879

# StartChecker - method

1880

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

952

1881

@dbus.service.method(_interface)

953

1882

def StartChecker(self):

954

1883

"D-Bus method"

955

1884

self.start_checker()

956

1885

957

1886

# Disable - method

1887

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

958

1888

@dbus.service.method(_interface)

959

1889

def Disable(self):

960

1890

"D-Bus method"

961

1891

self.disable()

962

1892

963

1893

# StopChecker - method

1894

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

964

1895

@dbus.service.method(_interface)

965

1896

def StopChecker(self):

966

1897

self.stop_checker()

973

1904

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

974

1905

975

1906

# ApprovedByDefault - property

976

@dbus_service_property(_interface, signature="b",

1907

@dbus_service_property(_interface,

1908

signature="b",

977

1909

access="readwrite")

978

1910

def ApprovedByDefault_dbus_property(self, value=None):

979

1911

if value is None: # get

980

1912

return dbus.Boolean(self.approved_by_default)

981

1913

self.approved_by_default = bool(value)

982

# Emit D-Bus signal

983

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

984

dbus.Boolean(value, variant_level=1))

985

1914

986

1915

# ApprovalDelay - property

987

@dbus_service_property(_interface, signature="t",

1916

@dbus_service_property(_interface,

1917

signature="t",

988

1918

access="readwrite")

989

1919

def ApprovalDelay_dbus_property(self, value=None):

990

1920

if value is None: # get

991

return dbus.UInt64(self.approval_delay_milliseconds())

1921

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

1922

* 1000)

992

1923

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

993

# Emit D-Bus signal

994

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

995

dbus.UInt64(value, variant_level=1))

996

1924

997

1925

# ApprovalDuration - property

998

@dbus_service_property(_interface, signature="t",

1926

@dbus_service_property(_interface,

1927

signature="t",

999

1928

access="readwrite")

1000

1929

def ApprovalDuration_dbus_property(self, value=None):

1001

1930

if value is None: # get

1002

return dbus.UInt64(self._timedelta_to_milliseconds(

1003

self.approval_duration))

1931

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

1932

* 1000)

1004

1933

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

1005

# Emit D-Bus signal

1006

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

1007

dbus.UInt64(value, variant_level=1))

1008

1934

1009

1935

# Name - property

1936

@dbus_annotations(

1937

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

1010

1938

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

1011

1939

def Name_dbus_property(self):

1012

1940

return dbus.String(self.name)

1013

1941

1014

1942

# Fingerprint - property

1943

@dbus_annotations(

1944

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

1015

1945

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

1016

1946

def Fingerprint_dbus_property(self):

1017

1947

return dbus.String(self.fingerprint)

1018

1948

1019

1949

# Host - property

1020

@dbus_service_property(_interface, signature="s",

1950

@dbus_service_property(_interface,

1951

signature="s",

1021

1952

access="readwrite")

1022

1953

def Host_dbus_property(self, value=None):

1023

1954

if value is None: # get

1024

1955

return dbus.String(self.host)

1025

self.host = value

1026

# Emit D-Bus signal

1027

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

1028

dbus.String(value, variant_level=1))

1956

self.host = str(value)

1029

1957

1030

1958

# Created - property

1959

@dbus_annotations(

1960

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

1031

1961

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

1032

1962

def Created_dbus_property(self):

1033

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

1963

return datetime_to_dbus(self.created)

1034

1964

1035

1965

# LastEnabled - property

1036

1966

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

1037

1967

def LastEnabled_dbus_property(self):

1038

if self.last_enabled is None:

1039

return dbus.String("")

1040

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

1968

return datetime_to_dbus(self.last_enabled)

1041

1969

1042

1970

# Enabled - property

1043

@dbus_service_property(_interface, signature="b",

1971

@dbus_service_property(_interface,

1972

signature="b",

1044

1973

access="readwrite")

1045

1974

def Enabled_dbus_property(self, value=None):

1046

1975

if value is None: # get

1051

1980

self.disable()

1052

1981

1053

1982

# LastCheckedOK - property

1054

@dbus_service_property(_interface, signature="s",

1983

@dbus_service_property(_interface,

1984

signature="s",

1055

1985

access="readwrite")

1056

1986

def LastCheckedOK_dbus_property(self, value=None):

1057

1987

if value is not None:

1058

1988

self.checked_ok()

1059

1989

return

1060

if self.last_checked_ok is None:

1061

return dbus.String("")

1062

return dbus.String(self._datetime_to_dbus(self

1063

.last_checked_ok))

1990

return datetime_to_dbus(self.last_checked_ok)

1991

1992

# LastCheckerStatus - property

1993

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

1994

def LastCheckerStatus_dbus_property(self):

1995

return dbus.Int16(self.last_checker_status)

1996

1997

# Expires - property

1998

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

1999

def Expires_dbus_property(self):

2000

return datetime_to_dbus(self.expires)

1064

2001

1065

2002

# LastApprovalRequest - property

1066

2003

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

1067

2004

def LastApprovalRequest_dbus_property(self):

1068

if self.last_approval_request is None:

1069

return dbus.String("")

1070

return dbus.String(self.

1071

_datetime_to_dbus(self

1072

.last_approval_request))

2005

return datetime_to_dbus(self.last_approval_request)

1073

2006

1074

2007

# Timeout - property

1075

@dbus_service_property(_interface, signature="t",

2008

@dbus_service_property(_interface,

2009

signature="t",

1076

2010

access="readwrite")

1077

2011

def Timeout_dbus_property(self, value=None):

1078

2012

if value is None: # get

1079

return dbus.UInt64(self.timeout_milliseconds())

2013

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

2014

old_timeout = self.timeout

1080

2015

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

1081

# Emit D-Bus signal

1082

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

1083

dbus.UInt64(value, variant_level=1))

1084

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

1085

return

1086

# Reschedule timeout

1087

gobject.source_remove(self.disable_initiator_tag)

1088

self.disable_initiator_tag = None

1089

time_to_die = (self.

1090

_timedelta_to_milliseconds((self

1091

.last_checked_ok

1092

+ self.timeout)

1093

- datetime.datetime

1094

.utcnow()))

1095

if time_to_die <= 0:

1096

# The timeout has passed

1097

self.disable()

1098

else:

1099

self.disable_initiator_tag = (gobject.timeout_add

1100

(time_to_die, self.disable))

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)

2031

2032

# ExtendedTimeout - property

2033

@dbus_service_property(_interface,

2034

signature="t",

2035

access="readwrite")

2036

def ExtendedTimeout_dbus_property(self, value=None):

2037

if value is None: # get

2038

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

2039

* 1000)

2040

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

1101

2041

1102

2042

# Interval - property

1103

@dbus_service_property(_interface, signature="t",

2043

@dbus_service_property(_interface,

2044

signature="t",

1104

2045

access="readwrite")

1105

2046

def Interval_dbus_property(self, value=None):

1106

2047

if value is None: # get

1107

return dbus.UInt64(self.interval_milliseconds())

2048

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

1108

2049

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

1109

# Emit D-Bus signal

1110

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

1111

dbus.UInt64(value, variant_level=1))

1112

2050

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

1113

2051

return

1114

# Reschedule checker run

1115

gobject.source_remove(self.checker_initiator_tag)

1116

self.checker_initiator_tag = (gobject.timeout_add

1117

(value, self.start_checker))

1118

self.start_checker() # Start one now, too

1119

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

2058

1120

2059

# Checker - property

1121

@dbus_service_property(_interface, signature="s",

2060

@dbus_service_property(_interface,

2061

signature="s",

1122

2062

access="readwrite")

1123

2063

def Checker_dbus_property(self, value=None):

1124

2064

if value is None: # get

1125

2065

return dbus.String(self.checker_command)

1126

self.checker_command = value

1127

# Emit D-Bus signal

1128

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

1129

dbus.String(self.checker_command,

1130

variant_level=1))

2066

self.checker_command = str(value)

1131

2067

1132

2068

# CheckerRunning - property

1133

@dbus_service_property(_interface, signature="b",

2069

@dbus_service_property(_interface,

2070

signature="b",

1134

2071

access="readwrite")

1135

2072

def CheckerRunning_dbus_property(self, value=None):

1136

2073

if value is None: # get

1141

2078

self.stop_checker()

1142

2079

1143

2080

# ObjectPath - property

2081

@dbus_annotations(

2082

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

2083

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

1144

2084

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

1145

2085

def ObjectPath_dbus_property(self):

1146

2086

return self.dbus_object_path # is already a dbus.ObjectPath

1147

2087

1148

2088

# Secret = property

1149

@dbus_service_property(_interface, signature="ay",

1150

access="write", byte_arrays=True)

2089

@dbus_annotations(

2090

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

2091

"invalidates"})

2092

@dbus_service_property(_interface,

2093

signature="ay",

2094

access="write",

2095

byte_arrays=True)

1151

2096

def Secret_dbus_property(self, value):

1152

self.secret = str(value)

2097

self.secret = bytes(value)

1153

2098

1154

2099

del _interface

1155

2100

1159

2104

self._pipe = child_pipe

1160

2105

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

1161

2106

if not self._pipe.recv():

1162

raise KeyError()

1163

2107

raise KeyError(fpr)

2108

1164

2109

def __getattribute__(self, name):

1165

if(name == '_pipe'):

2110

if name == '_pipe':

1166

2111

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

1167

2112

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

1168

2113

data = self._pipe.recv()

1169

2114

if data[0] == 'data':

1170

2115

return data[1]

1171

2116

if data[0] == 'function':

2117

1172

2118

def func(*args, **kwargs):

1173

2119

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

1174

2120

return self._pipe.recv()[1]

2121

1175

2122

return func

1176

2123

1177

2124

def __setattr__(self, name, value):

1178

if(name == '_pipe'):

2125

if name == '_pipe':

1179

2126

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

1180

2127

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

1181

2128

1189

2136

def handle(self):

1190

2137

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

1191

2138

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

1192

unicode(self.client_address))

2139

str(self.client_address))

1193

2140

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

1194

2141

self.server.child_pipe.fileno())

1195

1196

session = (gnutls.connection

1197

.ClientSession(self.request,

1198

gnutls.connection

1199

.X509Credentials()))

1200

1201

# Note: gnutls.connection.X509Credentials is really a

1202

# generic GnuTLS certificate credentials object so long as

1203

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

1204

# here despite using OpenPGP certificates.

1205

2142

2143

session = gnutls.ClientSession(self.request)

2144

1206

2145

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

1207

2146

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

1208

2147

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

1211

2150

priority = self.server.gnutls_priority

1212

2151

if priority is None:

1213

2152

priority = "NORMAL"

1214

(gnutls.library.functions

1215

.gnutls_priority_set_direct(session._c_object,

1216

priority, None))

1217

2153

gnutls.priority_set_direct(session._c_object, priority,

2154

None)

2155

1218

2156

# Start communication using the Mandos protocol

1219

2157

# Get protocol number

1220

2158

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

1221

2159

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

1222

2160

try:

1223

2161

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

1224

raise RuntimeError

2162

raise RuntimeError(line)

1225

2163

except (ValueError, IndexError, RuntimeError) as error:

1226

2164

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

1227

2165

return

1228

2166

1229

2167

# Start GnuTLS connection

1230

2168

try:

1231

2169

session.handshake()

1232

except gnutls.errors.GNUTLSError as error:

2170

except gnutls.Error as error:

1233

2171

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

1234

2172

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

1235

2173

# established. Just abandon the request.

1236

2174

return

1237

2175

logger.debug("Handshake succeeded")

1238

2176

1239

2177

approval_required = False

1240

2178

try:

1241

2179

try:

1242

fpr = self.fingerprint(self.peer_certificate

1243

(session))

1244

except (TypeError,

1245

gnutls.errors.GNUTLSError) as error:

2180

fpr = self.fingerprint(

2181

self.peer_certificate(session))

2182

except (TypeError, gnutls.Error) as error:

1246

2183

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

1247

2184

return

1248

2185

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

1249

2186

1250

2187

try:

1251

2188

client = ProxyClient(child_pipe, fpr,

1252

2189

self.client_address)

1260

2197

1261

2198

while True:

1262

2199

if not client.enabled:

1263

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

1264

client.name)

2200

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

2201

client.name)

1265

2202

if self.server.use_dbus:

1266

2203

# Emit D-Bus signal

1267

client.Rejected("Disabled")

2204

client.Rejected("Disabled")

1268

2205

return

1269

2206

1270

if client._approved or not client.approval_delay:

2207

if client.approved or not client.approval_delay:

1271

2208

#We are approved or approval is disabled

1272

2209

break

1273

elif client._approved is None:

2210

elif client.approved is None:

1274

2211

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

1275

2212

client.name)

1276

2213

if self.server.use_dbus:

1277

2214

# Emit D-Bus signal

1278

2215

client.NeedApproval(

1279

client.approval_delay_milliseconds(),

1280

client.approved_by_default)

2216

client.approval_delay.total_seconds()

2217

* 1000, client.approved_by_default)

1281

2218

else:

1282

2219

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

1283

2220

client.name)

1287

2224

return

1288

2225

1289

2226

#wait until timeout or approved

1290

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

1291

2227

time = datetime.datetime.now()

1292

2228

client.changedstate.acquire()

1293

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

2229

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

1294

2230

client.changedstate.release()

1295

2231

time2 = datetime.datetime.now()

1296

2232

if (time2 - time) >= delay:

1307

2243

else:

1308

2244

delay -= time2 - time

1309

2245

1310

sent_size = 0

1311

while sent_size < len(client.secret):

1312

try:

1313

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

1314

except gnutls.errors.GNUTLSError as error:

1315

logger.warning("gnutls send failed")

1316

return

1317

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

1318

sent, len(client.secret)

1319

- (sent_size + sent))

1320

sent_size += sent

1321

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

2252

1322

2253

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

1323

# bump the timeout as if seen

1324

client.checked_ok()

2254

# bump the timeout using extended_timeout

2255

client.bump_timeout(client.extended_timeout)

1325

2256

if self.server.use_dbus:

1326

2257

# Emit D-Bus signal

1327

2258

client.GotSecret()

1331

2262

client.approvals_pending -= 1

1332

2263

try:

1333

2264

session.bye()

1334

except gnutls.errors.GNUTLSError as error:

1335

logger.warning("GnuTLS bye failed")

2265

except gnutls.Error as error:

2266

logger.warning("GnuTLS bye failed",

2267

exc_info=error)

1336

2268

1337

2269

@staticmethod

1338

2270

def peer_certificate(session):

1339

2271

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

1340

2272

# If not an OpenPGP certificate...

1341

if (gnutls.library.functions

1342

.gnutls_certificate_type_get(session._c_object)

1343

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1344

# ...do the normal thing

1345

return session.peer_certificate

2273

if (gnutls.certificate_type_get(session._c_object)

2274

!= gnutls.CRT_OPENPGP):

2275

# ...return invalid data

2276

return b""

1346

2277

list_size = ctypes.c_uint(1)

1347

cert_list = (gnutls.library.functions

1348

.gnutls_certificate_get_peers

2278

cert_list = (gnutls.certificate_get_peers

1349

2279

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

1350

2280

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

1351

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

1352

" certificate")

2281

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

1353

2282

if list_size.value == 0:

1354

2283

return None

1355

2284

cert = cert_list[0]

1359

2288

def fingerprint(openpgp):

1360

2289

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1361

2290

# New GnuTLS "datum" with the OpenPGP public key

1362

datum = (gnutls.library.types

1363

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

1364

ctypes.POINTER

1365

(ctypes.c_ubyte)),

1366

ctypes.c_uint(len(openpgp))))

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)))

1367

2295

# New empty GnuTLS certificate

1368

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1369

(gnutls.library.functions

1370

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2296

crt = gnutls.openpgp_crt_t()

2297

gnutls.openpgp_crt_init(ctypes.byref(crt))

1371

2298

# Import the OpenPGP public key into the certificate

1372

(gnutls.library.functions

1373

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

1374

gnutls.library.constants

1375

.GNUTLS_OPENPGP_FMT_RAW))

2299

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

2300

gnutls.OPENPGP_FMT_RAW)

1376

2301

# Verify the self signature in the key

1377

2302

crtverify = ctypes.c_uint()

1378

(gnutls.library.functions

1379

.gnutls_openpgp_crt_verify_self(crt, 0,

1380

ctypes.byref(crtverify)))

2303

gnutls.openpgp_crt_verify_self(crt, 0,

2304

ctypes.byref(crtverify))

1381

2305

if crtverify.value != 0:

1382

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1383

raise (gnutls.errors.CertificateSecurityError

1384

("Verify failed"))

2306

gnutls.openpgp_crt_deinit(crt)

2307

raise gnutls.CertificateSecurityError("Verify failed")

1385

2308

# New buffer for the fingerprint

1386

2309

buf = ctypes.create_string_buffer(20)

1387

2310

buf_len = ctypes.c_size_t()

1388

2311

# Get the fingerprint from the certificate into the buffer

1389

(gnutls.library.functions

1390

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

1391

ctypes.byref(buf_len)))

2312

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

2313

ctypes.byref(buf_len))

1392

2314

# Deinit the certificate

1393

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2315

gnutls.openpgp_crt_deinit(crt)

1394

2316

# Convert the buffer to a Python bytestring

1395

2317

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

1396

2318

# Convert the bytestring to hexadecimal notation

1397

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

2319

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

1398

2320

return hex_fpr

1399

2321

1400

2322

1401

2323

class MultiprocessingMixIn(object):

1402

2324

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

2325

1403

2326

def sub_process_main(self, request, address):

1404

2327

try:

1405

2328

self.finish_request(request, address)

1406

except:

2329

except Exception:

1407

2330

self.handle_error(request, address)

1408

2331

self.close_request(request)

1409

2332

1410

2333

def process_request(self, request, address):

1411

2334

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

1412

multiprocessing.Process(target = self.sub_process_main,

1413

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

2335

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

2336

args = (request, address))

2337

proc.start()

2338

return proc

2339

1414

2340

1415

2341

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1416

2342

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

2343

1417

2344

def process_request(self, request, client_address):

1418

2345

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

1419

2346

1420

2347

This function creates a new pipe in self.pipe

1421

2348

"""

1422

2349

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1423

1424

super(MultiprocessingMixInWithPipe,

1425

self).process_request(request, client_address)

2350

2351

proc = MultiprocessingMixIn.process_request(self, request,

2352

client_address)

1426

2353

self.child_pipe.close()

1427

self.add_pipe(parent_pipe)

1428

1429

def add_pipe(self, parent_pipe):

2354

self.add_pipe(parent_pipe, proc)

2355

2356

def add_pipe(self, parent_pipe, proc):

1430

2357

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

1431

raise NotImplementedError

2358

raise NotImplementedError()

2359

1432

2360

1433

2361

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1434

2362

socketserver.TCPServer, object):

1439

2367

interface: None or a network interface name (string)

1440

2368

use_ipv6: Boolean; to use IPv6 or not

1441

2369

"""

2370

1442

2371

def __init__(self, server_address, RequestHandlerClass,

1443

interface=None, use_ipv6=True):

2372

interface=None,

2373

use_ipv6=True,

2374

socketfd=None):

2375

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

2376

creating a new one with socket.socket().

2377

"""

1444

2378

self.interface = interface

1445

2379

if use_ipv6:

1446

2380

self.address_family = socket.AF_INET6

2381

if socketfd is not None:

2382

# Save the file descriptor

2383

self.socketfd = socketfd

2384

# Save the original socket.socket() function

2385

self.socket_socket = socket.socket

2386

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

2387

#

2388

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

2389

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

2390

# patching socket.socket.)

2391

#

2392

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

2393

@functools.wraps(socket.socket)

2394

def socket_wrapper(*args, **kwargs):

2395

# Restore original function so subsequent calls are

2396

# not affected.

2397

socket.socket = self.socket_socket

2398

del self.socket_socket

2399

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

2400

# saved file descriptor.

2401

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

2402

# Replace socket.socket() function with wrapper

2403

socket.socket = socket_wrapper

2404

# The socketserver.TCPServer.__init__ will call

2405

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

2406

# socket_wrapper(), if socketfd was set.

1447

2407

socketserver.TCPServer.__init__(self, server_address,

1448

2408

RequestHandlerClass)

2409

1449

2410

def server_bind(self):

1450

2411

"""This overrides the normal server_bind() function

1451

2412

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

1457

2418

self.interface)

1458

2419

else:

1459

2420

try:

1460

self.socket.setsockopt(socket.SOL_SOCKET,

1461

SO_BINDTODEVICE,

1462

str(self.interface

1463

+ '\0'))

2421

self.socket.setsockopt(

2422

socket.SOL_SOCKET, SO_BINDTODEVICE,

2423

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

1464

2424

except socket.error as error:

1465

if error[0] == errno.EPERM:

1466

logger.error("No permission to"

1467

" bind to interface %s",

1468

self.interface)

1469

elif error[0] == errno.ENOPROTOOPT:

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:

1470

2429

logger.error("SO_BINDTODEVICE not available;"

1471

2430

" cannot bind to interface %s",

1472

2431

self.interface)

2432

elif error.errno == errno.ENODEV:

2433

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

2434

" cannot bind", self.interface)

1473

2435

else:

1474

2436

raise

1475

2437

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

1478

2440

if self.address_family == socket.AF_INET6:

1479

2441

any_address = "::" # in6addr_any

1480

2442

else:

1481

any_address = socket.INADDR_ANY

2443

any_address = "0.0.0.0" # INADDR_ANY

1482

2444

self.server_address = (any_address,

1483

2445

self.server_address[1])

1484

2446

elif not self.server_address[1]:

1485

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

1486

0)

2447

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

1487

2448

# if self.interface:

1488

2449

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

1489

2450

# 0, # port

1501

2462

gnutls_priority GnuTLS priority string

1502

2463

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

1503

2464

1504

Assumes a gobject.MainLoop event loop.

2465

Assumes a GObject.MainLoop event loop.

1505

2466

"""

2467

1506

2468

def __init__(self, server_address, RequestHandlerClass,

1507

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

1508

gnutls_priority=None, use_dbus=True):

2469

interface=None,

2470

use_ipv6=True,

2471

clients=None,

2472

gnutls_priority=None,

2473

use_dbus=True,

2474

socketfd=None):

1509

2475

self.enabled = False

1510

2476

self.clients = clients

1511

2477

if self.clients is None:

1512

self.clients = set()

2478

self.clients = {}

1513

2479

self.use_dbus = use_dbus

1514

2480

self.gnutls_priority = gnutls_priority

1515

2481

IPv6_TCPServer.__init__(self, server_address,

1516

2482

RequestHandlerClass,

1517

2483

interface = interface,

1518

use_ipv6 = use_ipv6)

2484

use_ipv6 = use_ipv6,

2485

socketfd = socketfd)

2486

1519

2487

def server_activate(self):

1520

2488

if self.enabled:

1521

2489

return socketserver.TCPServer.server_activate(self)

2490

1522

2491

def enable(self):

1523

2492

self.enabled = True

1524

def add_pipe(self, parent_pipe):

2493

2494

def add_pipe(self, parent_pipe, proc):

1525

2495

# Call "handle_ipc" for both data and EOF events

1526

gobject.io_add_watch(parent_pipe.fileno(),

1527

gobject.IO_IN | gobject.IO_HUP,

1528

functools.partial(self.handle_ipc,

1529

parent_pipe = parent_pipe))

1530

1531

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

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,

1532

2506

client_object=None):

1533

condition_names = {

1534

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

1535

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

1536

# blocking).

1537

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

1538

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

1539

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

1540

# broken, usually for pipes and

1541

# sockets).

1542

}

1543

conditions_string = ' | '.join(name

1544

for cond, name in

1545

condition_names.iteritems()

1546

if cond & condition)

1547

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

1548

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

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()

1549

2511

return False

1550

2512

1551

2513

# Read a request from the child

1556

2518

fpr = request[1]

1557

2519

address = request[2]

1558

2520

1559

for c in self.clients:

2521

for c in self.clients.itervalues():

1560

2522

if c.fingerprint == fpr:

1561

2523

client = c

1562

2524

break

1563

2525

else:

1564

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

1565

"dress: %s", fpr, address)

2526

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

2527

"dress: %s", fpr, address)

1566

2528

if self.use_dbus:

1567

2529

# Emit D-Bus signal

1568

mandos_dbus_service.ClientNotFound(fpr, address[0])

2530

mandos_dbus_service.ClientNotFound(fpr,

2531

address[0])

1569

2532

parent_pipe.send(False)

1570

2533

return False

1571

2534

1572

gobject.io_add_watch(parent_pipe.fileno(),

1573

gobject.IO_IN | gobject.IO_HUP,

1574

functools.partial(self.handle_ipc,

1575

parent_pipe = parent_pipe,

1576

client_object = client))

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))

1577

2542

parent_pipe.send(True)

1578

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

2543

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

2544

# same fileno

1579

2545

return False

1580

2546

if command == 'funcall':

1581

2547

funcname = request[1]

1582

2548

args = request[2]

1583

2549

kwargs = request[3]

1584

2550

1585

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

1586

2551

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

2552

funcname)(*args,

2553

**kwargs)))

2554

1587

2555

if command == 'getattr':

1588

2556

attrname = request[1]

1589

if callable(client_object.__getattribute__(attrname)):

1590

parent_pipe.send(('function',))

2557

if isinstance(client_object.__getattribute__(attrname),

2558

collections.Callable):

2559

parent_pipe.send(('function', ))

1591

2560

else:

1592

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

2561

parent_pipe.send((

2562

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

1593

2563

1594

2564

if command == 'setattr':

1595

2565

attrname = request[1]

1596

2566

value = request[2]

1597

2567

setattr(client_object, attrname, value)

1598

2568

1599

2569

return True

1600

2570

1601

2571

2572

def rfc3339_duration_to_delta(duration):

2573

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

2574

2575

>>> rfc3339_duration_to_delta("P7D")

2576

datetime.timedelta(7)

2577

>>> rfc3339_duration_to_delta("PT60S")

2578

datetime.timedelta(0, 60)

2579

>>> rfc3339_duration_to_delta("PT60M")

2580

datetime.timedelta(0, 3600)

2581

>>> rfc3339_duration_to_delta("PT24H")

2582

datetime.timedelta(1)

2583

>>> rfc3339_duration_to_delta("P1W")

2584

datetime.timedelta(7)

2585

>>> rfc3339_duration_to_delta("PT5M30S")

2586

datetime.timedelta(0, 330)

2587

>>> rfc3339_duration_to_delta("P1DT3M20S")

2588

datetime.timedelta(1, 200)

2589

"""

2590

2591

# Parsing an RFC 3339 duration with regular expressions is not

2592

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

2593

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

2594

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

2595

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

2596

# avoid excessive use of external libraries.

2597

2598

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

2599

Token = collections.namedtuple("Token", (

2600

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

2601

# a "group" containing digits

2602

"value", # datetime.timedelta or None

2603

"followers")) # Tokens valid after this token

2604

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

2605

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

2606

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

2607

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

2608

datetime.timedelta(seconds=1),

2609

frozenset((token_end, )))

2610

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

2611

datetime.timedelta(minutes=1),

2612

frozenset((token_second, token_end)))

2613

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

2614

datetime.timedelta(hours=1),

2615

frozenset((token_minute, token_end)))

2616

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

2617

None,

2618

frozenset((token_hour, token_minute,

2619

token_second)))

2620

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

2621

datetime.timedelta(days=1),

2622

frozenset((token_time, token_end)))

2623

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

2624

datetime.timedelta(weeks=4),

2625

frozenset((token_day, token_end)))

2626

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

2627

datetime.timedelta(weeks=52),

2628

frozenset((token_month, token_end)))

2629

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

2630

datetime.timedelta(weeks=1),

2631

frozenset((token_end, )))

2632

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

2633

frozenset((token_year, token_month,

2634

token_day, token_time,

2635

token_week)))

2636

# Define starting values

2637

value = datetime.timedelta() # Value so far

2638

found_token = None

2639

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

2640

s = duration # String left to parse

2641

# Loop until end token is found

2642

while found_token is not token_end:

2643

# Search for any currently valid tokens

2644

for token in followers:

2645

match = token.regexp.match(s)

2646

if match is not None:

2647

# Token found

2648

if token.value is not None:

2649

# Value found, parse digits

2650

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

2651

# Add to value so far

2652

value += factor * token.value

2653

# Strip token from string

2654

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

2655

# Go to found token

2656

found_token = token

2657

# Set valid next tokens

2658

followers = found_token.followers

2659

break

2660

else:

2661

# No currently valid tokens were found

2662

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

2663

.format(duration))

2664

# End token found

2665

return value

2666

2667

1602

2668

def string_to_delta(interval):

1603

2669

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

1604

2670

1615

2681

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

1616

2682

datetime.timedelta(0, 330)

1617

2683

"""

2684

2685

try:

2686

return rfc3339_duration_to_delta(interval)

2687

except ValueError:

2688

pass

2689

1618

2690

timevalue = datetime.timedelta(0)

1619

2691

for s in interval.split():

1620

2692

try:

1621

suffix = unicode(s[-1])

2693

suffix = s[-1]

1622

2694

value = int(s[:-1])

1623

2695

if suffix == "d":

1624

2696

delta = datetime.timedelta(value)

1631

2703

elif suffix == "w":

1632

2704

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

1633

2705

else:

1634

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

1635

except (ValueError, IndexError) as e:

2706

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

2707

except IndexError as e:

1636

2708

raise ValueError(*(e.args))

1637

2709

timevalue += delta

1638

2710

return timevalue

1639

2711

1640

2712

1641

def if_nametoindex(interface):

1642

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

1643

1644

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

1645

global if_nametoindex

1646

try:

1647

if_nametoindex = (ctypes.cdll.LoadLibrary

1648

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

1649

.if_nametoindex)

1650

except (OSError, AttributeError):

1651

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

1652

def if_nametoindex(interface):

1653

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

1654

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

1655

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

1656

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1657

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

1658

interface))

1659

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

1660

ifreq[16:20])[0]

1661

return interface_index

1662

return if_nametoindex(interface)

1663

1664

1665

2713

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

1666

2714

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

1667

2715

1675

2723

sys.exit()

1676

2724

if not noclose:

1677

2725

# Close all standard open file descriptors

1678

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

2726

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

1679

2727

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

1680

2728

raise OSError(errno.ENODEV,

1681

"%s not a character device"

1682

% os.path.devnull)

2729

"{} not a character device"

2730

.format(os.devnull))

1683

2731

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

1684

2732

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

1685

2733

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

1694

2742

1695

2743

parser = argparse.ArgumentParser()

1696

2744

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

1697

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

2745

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

1698

2746

help="show version number and exit")

1699

2747

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

1700

2748

help="Bind to interface IF")

1706

2754

help="Run self-test")

1707

2755

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

1708

2756

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

1709

" to terminal")

2757

" to terminal", default=None)

1710

2758

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

1711

2759

help="Debug level for stdout output")

1712

2760

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

1719

2767

" files")

1720

2768

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

1721

2769

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

1722

" system bus interface")

2770

" system bus interface", default=None)

1723

2771

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

1724

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

2772

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

2773

default=None)

2774

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

2775

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

2776

" state", default=None)

2777

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

2778

help="Specify a file descriptor to a network"

2779

" socket to use instead of creating one")

2780

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

2781

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

2782

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

2783

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

2784

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

2785

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

2786

default=None)

2787

1725

2788

options = parser.parse_args()

1726

2789

1727

2790

if options.check:

1728

2791

import doctest

1729

doctest.testmod()

1730

sys.exit()

2792

fail_count, test_count = doctest.testmod()

2793

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

1731

2794

1732

2795

# Default values for config file for server-global settings

1733

2796

server_defaults = { "interface": "",

1735

2798

"port": "",

1736

2799

"debug": "False",

1737

2800

"priority":

1738

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

2801

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

2802

":+SIGN-DSA-SHA256",

1739

2803

"servicename": "Mandos",

1740

2804

"use_dbus": "True",

1741

2805

"use_ipv6": "True",

1742

2806

"debuglevel": "",

1743

}

2807

"restore": "True",

2808

"socket": "",

2809

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

2810

"foreground": "False",

2811

"zeroconf": "True",

2812

}

1744

2813

1745

2814

# Parse config file for server-global settings

1746

2815

server_config = configparser.SafeConfigParser(server_defaults)

1747

2816

del server_defaults

1748

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

1749

"mandos.conf"))

2817

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

1750

2818

# Convert the SafeConfigParser object to a dict

1751

2819

server_settings = server_config.defaults()

1752

2820

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

1753

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

2821

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

1754

2822

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

1755

2823

option)

1756

2824

if server_settings["port"]:

1757

2825

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

1758

2826

"port")

2827

if server_settings["socket"]:

2828

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

2829

"socket")

2830

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

2831

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

2832

# happen with a supplied network socket.

2833

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

2834

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

2835

["socket"])

1759

2836

del server_config

1760

2837

1761

2838

# Override the settings from the config file with command line

1762

2839

# options, if set.

1763

2840

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

1764

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

1765

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

2841

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

2842

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

2843

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

1766

2844

value = getattr(options, option)

1767

2845

if value is not None:

1768

2846

server_settings[option] = value

1769

2847

del options

1770

2848

# Force all strings to be unicode

1771

2849

for option in server_settings.keys():

1772

if type(server_settings[option]) is str:

1773

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

2850

if isinstance(server_settings[option], bytes):

2851

server_settings[option] = (server_settings[option]

2852

.decode("utf-8"))

2853

# Force all boolean options to be boolean

2854

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

2855

"foreground", "zeroconf"):

2856

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

2857

# Debug implies foreground

2858

if server_settings["debug"]:

2859

server_settings["foreground"] = True

1774

2860

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

1775

2861

1776

2862

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

1777

2863

2864

if (not server_settings["zeroconf"]

2865

and not (server_settings["port"]

2866

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

2867

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

2868

1778

2869

# For convenience

1779

2870

debug = server_settings["debug"]

1780

2871

debuglevel = server_settings["debuglevel"]

1781

2872

use_dbus = server_settings["use_dbus"]

1782

2873

use_ipv6 = server_settings["use_ipv6"]

1783

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

1784

2888

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

1785

syslogger.setFormatter(logging.Formatter

1786

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

1787

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

1788

% server_settings["servicename"]))

2889

syslogger.setFormatter(

2890

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

2891

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

2892

server_settings["servicename"])))

1789

2893

1790

2894

# Parse config file with clients

1791

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

1792

"interval": "5m",

1793

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

1794

"host": "",

1795

"approval_delay": "0s",

1796

"approval_duration": "1s",

1797

}

1798

client_config = configparser.SafeConfigParser(client_defaults)

2895

client_config = configparser.SafeConfigParser(Client

2896

.client_defaults)

1799

2897

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

1800

2898

"clients.conf"))

1801

2899

1802

2900

global mandos_dbus_service

1803

2901

mandos_dbus_service = None

1804

2902

1805

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

1806

server_settings["port"]),

1807

ClientHandler,

1808

interface=(server_settings["interface"]

1809

or None),

1810

use_ipv6=use_ipv6,

1811

gnutls_priority=

1812

server_settings["priority"],

1813

use_dbus=use_dbus)

1814

if not debug:

1815

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

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

1816

2919

try:

1817

pidfile = open(pidfilename, "w")

1818

except IOError:

1819

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

2920

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

2921

except IOError as e:

2922

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

2923

exc_info=e)

1820

2924

1821

try:

1822

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

1823

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

1824

except KeyError:

2925

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

2926

("mandos", "mandos"),

2927

("nobody", "nogroup")):

1825

2928

try:

1826

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

1827

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

2929

uid = pwd.getpwnam(name).pw_uid

2930

gid = pwd.getpwnam(group).pw_gid

2931

break

1828

2932

except KeyError:

1829

try:

1830

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

1831

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

1832

except KeyError:

1833

uid = 65534

1834

gid = 65534

2933

continue

2934

else:

2935

uid = 65534

2936

gid = 65534

1835

2937

try:

1836

2938

os.setgid(gid)

1837

2939

os.setuid(uid)

1838

2940

except OSError as error:

1839

if error[0] != errno.EPERM:

1840

raise error

2941

if error.errno != errno.EPERM:

2942

raise

1841

2943

1842

if not debug and not debuglevel:

1843

syslogger.setLevel(logging.WARNING)

1844

console.setLevel(logging.WARNING)

1845

if debuglevel:

1846

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

1847

syslogger.setLevel(level)

1848

console.setLevel(level)

1849

1850

2944

if debug:

1851

2945

# Enable all possible GnuTLS debugging

1852

2946

1853

2947

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

1854

2948

# - GnuTLS manual

1855

gnutls.library.functions.gnutls_global_set_log_level(11)

2949

gnutls.global_set_log_level(11)

1856

2950

1857

@gnutls.library.types.gnutls_log_func

2951

@gnutls.log_func

1858

2952

def debug_gnutls(level, string):

1859

2953

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

1860

2954

1861

(gnutls.library.functions

1862

.gnutls_global_set_log_function(debug_gnutls))

2955

gnutls.global_set_log_function(debug_gnutls)

1863

2956

1864

2957

# Redirect stdin so all checkers get /dev/null

1865

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

2958

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

1866

2959

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

1867

2960

if null > 2:

1868

2961

os.close(null)

1869

else:

1870

# No console logging

1871

logger.removeHandler(console)

1872

2962

1873

2963

# Need to fork before connecting to D-Bus

1874

if not debug:

2964

if not foreground:

1875

2965

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

1876

2966

daemon()

1877

2967

2968

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

2969

# need to inform GObject that threads will be used.

2970

GObject.threads_init()

2971

1878

2972

global main_loop

1879

2973

# From the Avahi example code

1880

DBusGMainLoop(set_as_default=True )

1881

main_loop = gobject.MainLoop()

2974

DBusGMainLoop(set_as_default=True)

2975

main_loop = GObject.MainLoop()

1882

2976

bus = dbus.SystemBus()

1883

2977

# End of Avahi example code

1884

2978

if use_dbus:

1885

2979

try:

1886

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

1887

bus, do_not_queue=True)

1888

except dbus.exceptions.NameExistsException as e:

1889

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

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)

1890

2988

use_dbus = False

1891

2989

server_settings["use_dbus"] = False

1892

2990

tcp_server.use_dbus = False

1893

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1894

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

1895

servicetype = "_mandos._tcp",

1896

protocol = protocol, bus = bus)

1897

if server_settings["interface"]:

1898

service.interface = (if_nametoindex

1899

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

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"))

1900

3001

1901

3002

global multiprocessing_manager

1902

3003

multiprocessing_manager = multiprocessing.Manager()

1904

3005

client_class = Client

1905

3006

if use_dbus:

1906

3007

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

1907

def client_config_items(config, section):

1908

special_settings = {

1909

"approved_by_default":

1910

lambda: config.getboolean(section,

1911

"approved_by_default"),

1912

}

1913

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

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))

1914

3092

try:

1915

yield (name, special_settings[name]())

1916

except KeyError:

1917

yield (name, value)

1918

1919

tcp_server.clients.update(set(

1920

client_class(name = section,

1921

config= dict(client_config_items(

1922

client_config, section)))

1923

for section in client_config.sections()))

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

1924

3118

if not tcp_server.clients:

1925

3119

logger.warning("No clients defined")

1926

1927

if not debug:

1928

try:

1929

with pidfile:

1930

pid = os.getpid()

1931

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

1932

del pidfile

1933

except IOError:

1934

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

1935

pidfilename, pid)

1936

except NameError:

1937

# "pidfile" was never created

1938

pass

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

1939

3131

del pidfilename

1940

1941

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

1942

3132

1943

3133

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

1944

3134

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

1945

3135

1946

3136

if use_dbus:

1947

class MandosDBusService(dbus.service.Object):

3137

3138

@alternate_dbus_interfaces(

3139

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

3140

class MandosDBusService(DBusObjectWithObjectManager):

1948

3141

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

3142

1949

3143

def __init__(self):

1950

3144

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

1951

_interface = "se.bsnet.fukt.Mandos"

3145

3146

_interface = "se.recompile.Mandos"

1952

3147

1953

3148

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

1954

3149

def ClientAdded(self, objpath):

1960

3155

"D-Bus signal"

1961

3156

pass

1962

3157

3158

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

3159

"true"})

1963

3160

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

1964

3161

def ClientRemoved(self, objpath, name):

1965

3162

"D-Bus signal"

1966

3163

pass

1967

3164

3165

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

3166

"true"})

1968

3167

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

1969

3168

def GetAllClients(self):

1970

3169

"D-Bus method"

1971

return dbus.Array(c.dbus_object_path

1972

for c in tcp_server.clients)

3170

return dbus.Array(c.dbus_object_path for c in

3171

tcp_server.clients.itervalues())

1973

3172

3173

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

3174

"true"})

1974

3175

@dbus.service.method(_interface,

1975

3176

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

1976

3177

def GetAllClientsWithProperties(self):

1977

3178

"D-Bus method"

1978

3179

return dbus.Dictionary(

1979

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

1980

for c in tcp_server.clients),

3180

{ c.dbus_object_path: c.GetAll(

3181

"se.recompile.Mandos.Client")

3182

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

1981

3183

signature="oa{sv}")

1982

3184

1983

3185

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

1984

3186

def RemoveClient(self, object_path):

1985

3187

"D-Bus method"

1986

for c in tcp_server.clients:

3188

for c in tcp_server.clients.itervalues():

1987

3189

if c.dbus_object_path == object_path:

1988

tcp_server.clients.remove(c)

3190

del tcp_server.clients[c.name]

1989

3191

c.remove_from_connection()

1990

# Don't signal anything except ClientRemoved

3192

# Don't signal the disabling

1991

3193

c.disable(quiet=True)

1992

# Emit D-Bus signal

1993

self.ClientRemoved(object_path, c.name)

3194

# Emit D-Bus signal for removal

3195

self.client_removed_signal(c)

1994

3196

return

1995

3197

raise KeyError(object_path)

1996

3198

1997

3199

del _interface

3200

3201

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3202

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

3203

def GetManagedObjects(self):

3204

"""D-Bus method"""

3205

return dbus.Dictionary(

3206

{ client.dbus_object_path:

3207

dbus.Dictionary(

3208

{ interface: client.GetAll(interface)

3209

for interface in

3210

client._get_all_interface_names()})

3211

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

3212

3213

def client_added_signal(self, client):

3214

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

3215

if use_dbus:

3216

# New standard signal

3217

self.InterfacesAdded(

3218

client.dbus_object_path,

3219

dbus.Dictionary(

3220

{ interface: client.GetAll(interface)

3221

for interface in

3222

client._get_all_interface_names()}))

3223

# Old signal

3224

self.ClientAdded(client.dbus_object_path)

3225

3226

def client_removed_signal(self, client):

3227

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

3228

if use_dbus:

3229

# New standard signal

3230

self.InterfacesRemoved(

3231

client.dbus_object_path,

3232

client._get_all_interface_names())

3233

# Old signal

3234

self.ClientRemoved(client.dbus_object_path,

3235

client.name)

1998

3236

1999

3237

mandos_dbus_service = MandosDBusService()

2000

3238

2001

3239

def cleanup():

2002

3240

"Cleanup function; run on exit"

2003

service.cleanup()

2004

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

2005

3302

while tcp_server.clients:

2006

client = tcp_server.clients.pop()

3303

name, client = tcp_server.clients.popitem()

2007

3304

if use_dbus:

2008

3305

client.remove_from_connection()

2009

client.disable_hook = None

2010

# Don't signal anything except ClientRemoved

3306

# Don't signal the disabling

2011

3307

client.disable(quiet=True)

3308

# Emit D-Bus signal for removal

2012

3309

if use_dbus:

2013

# Emit D-Bus signal

2014

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2015

client.name)

3310

mandos_dbus_service.client_removed_signal(client)

3311

client_settings.clear()

2016

3312

2017

3313

atexit.register(cleanup)

2018

3314

2019

for client in tcp_server.clients:

3315

for client in tcp_server.clients.itervalues():

2020

3316

if use_dbus:

2021

# Emit D-Bus signal

2022

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2023

client.enable()

3317

# Emit D-Bus signal for adding

3318

mandos_dbus_service.client_added_signal(client)

3319

# Need to initiate checking of clients

3320

if client.enabled:

3321

client.init_checker()

2024

3322

2025

3323

tcp_server.enable()

2026

3324

tcp_server.server_activate()

2027

3325

2028

3326

# Find out what port we got

2029

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

3327

if zeroconf:

3328

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

2030

3329

if use_ipv6:

2031

3330

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

2032

" flowinfo %d, scope_id %d"

2033

% tcp_server.socket.getsockname())

3331

" flowinfo %d, scope_id %d",

3332

*tcp_server.socket.getsockname())

2034

3333

else: # IPv4

2035

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

2036

% tcp_server.socket.getsockname())

3334

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

3335

*tcp_server.socket.getsockname())

2037

3336

2038

3337

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

2039

3338

2040

3339

try:

2041

# From the Avahi example code

2042

try:

2043

service.activate()

2044

except dbus.exceptions.DBusException as error:

2045

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

2046

cleanup()

2047

sys.exit(1)

2048

# End of Avahi example code

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

2049

3349

2050

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

3350

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

2051

3351

lambda *args, **kwargs:

2052

3352

(tcp_server.handle_request

2053

3353

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

2055

3355

logger.debug("Starting main loop")

2056

3356

main_loop.run()

2057

3357

except AvahiError as error:

2058

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

3358

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

2059

3359

cleanup()

2060

3360

sys.exit(1)

2061

3361

except KeyboardInterrupt:

2066

3366

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

2067

3367

cleanup()

2068

3368

3369

2069

3370

if __name__ == '__main__':

2070

3371

main()