/mandos/trunk : revision 817

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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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import gobject

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except ImportError:

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from gi.repository 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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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.group = None # our entry group

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self.server = None

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self.bus = bus

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def rename(self):

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self.entry_group_state_changed_match = None

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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, 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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except dbus.exceptions.DBusException as error:

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if (error.get_dbus_name()

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

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

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return self.rename(remove=False)

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else:

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

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self.cleanup()

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os._exit(1)

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match.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"""

340

self.remove()

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if self.group is None:

183

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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.group.connect_to_signal('StateChanged',

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self

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.entry_group_state_changed)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self.entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

203

363

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

209

369

self.rename()

210

370

elif state == avahi.ENTRY_GROUP_FAILURE:

211

371

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

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unicode(error))

213

raise AvahiGroupError("State changed: %s"

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% unicode(error))

372

str(error))

373

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

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def cleanup(self):

216

376

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

217

377

if self.group is not None:

218

self.group.Free()

378

try:

379

self.group.Free()

380

except (dbus.exceptions.UnknownMethodException,

381

dbus.exceptions.DBusException):

382

pass

219

383

self.group = None

220

def server_state_changed(self, state):

384

self.remove()

385

386

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

221

387

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

222

388

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

223

if state == avahi.SERVER_COLLISION:

224

logger.error("Zeroconf server name collision")

225

self.remove()

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

}

395

if state in bad_states:

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()

226

402

elif state == avahi.SERVER_RUNNING:

227

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)

415

else:

416

if error is None:

417

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

418

else:

419

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

420

228

421

def activate(self):

229

422

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

230

423

if self.server is None:

231

424

self.server = dbus.Interface(

232

425

self.bus.get_object(avahi.DBUS_NAME,

233

avahi.DBUS_PATH_SERVER),

426

avahi.DBUS_PATH_SERVER,

427

follow_name_owner_changes=True),

234

428

avahi.DBUS_INTERFACE_SERVER)

235

429

self.server.connect_to_signal("StateChanged",

236

self.server_state_changed)

430

self.server_state_changed)

237

431

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

238

432

239

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

240

708

class Client(object):

241

709

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

242

710

243

711

Attributes:

244

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

712

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

245

713

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

246

714

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

247

715

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

254

722

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

255

723

checker_initiator_tag: a gobject event source tag, or None

256

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

257

727

current_checker_command: string; current running checker_command

258

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

259

728

disable_initiator_tag: a gobject event source tag, or None

260

729

enabled: bool()

261

730

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

264

733

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

265

734

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

266

735

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

267

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

268

742

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

269

743

D-Bus identifiers

270

744

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

271

745

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

272

746

until this client is disabled

747

extended_timeout: extra long timeout when secret has been sent

273

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()

274

752

"""

275

753

276

754

runtime_expansions = ("approval_delay", "approval_duration",

277

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

278

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

755

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

756

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

757

"last_approval_request", "last_checked_ok",

279

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

}

280

770

281

771

@staticmethod

282

def _timedelta_to_milliseconds(td):

283

"Convert a datetime.timedelta() to milliseconds"

284

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

285

+ (td.seconds * 1000)

286

+ (td.microseconds // 1000))

287

288

def timeout_milliseconds(self):

289

"Return the 'timeout' attribute in milliseconds"

290

return self._timedelta_to_milliseconds(self.timeout)

291

292

def interval_milliseconds(self):

293

"Return the 'interval' attribute in milliseconds"

294

return self._timedelta_to_milliseconds(self.interval)

295

296

def approval_delay_milliseconds(self):

297

return self._timedelta_to_milliseconds(self.approval_delay)

298

299

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

300

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

301

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

302

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):

303

822

self.name = name

304

if config is None:

305

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

306

840

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

307

# Uppercase and remove spaces from fingerprint for later

308

# comparison purposes with return value from the fingerprint()

309

# function

310

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

311

.replace(" ", ""))

312

841

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

313

if "secret" in config:

314

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

315

elif "secfile" in config:

316

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

317

(config["secfile"])),

318

"rb") as secfile:

319

self.secret = secfile.read()

320

else:

321

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

322

% self.name)

323

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

324

self.created = datetime.datetime.utcnow()

325

self.enabled = False

326

self.last_approval_request = None

327

self.last_enabled = None

328

self.last_checked_ok = None

329

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

330

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

331

self.disable_hook = disable_hook

842

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

843

datetime.datetime.utcnow())

844

845

# attributes specific for this server instance

332

846

self.checker = None

333

847

self.checker_initiator_tag = None

334

848

self.disable_initiator_tag = None

335

849

self.checker_callback_tag = None

336

self.checker_command = config["checker"]

337

850

self.current_checker_command = None

338

self.last_connect = None

339

self._approved = None

340

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

341

True)

851

self.approved = None

342

852

self.approvals_pending = 0

343

self.approval_delay = string_to_delta(

344

config["approval_delay"])

345

self.approval_duration = string_to_delta(

346

config["approval_duration"])

347

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)

348

864

865

# Send notice to process children that client state has changed

349

866

def send_changedstate(self):

350

self.changedstate.acquire()

351

self.changedstate.notify_all()

352

self.changedstate.release()

353

867

with self.changedstate:

868

self.changedstate.notify_all()

869

354

870

def enable(self):

355

871

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

356

872

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

357

873

# Already enabled

358

874

return

359

self.send_changedstate()

875

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

876

self.enabled = True

360

877

self.last_enabled = datetime.datetime.utcnow()

361

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

362

# and every interval from then on.

363

self.checker_initiator_tag = (gobject.timeout_add

364

(self.interval_milliseconds(),

365

self.start_checker))

366

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

367

self.disable_initiator_tag = (gobject.timeout_add

368

(self.timeout_milliseconds(),

369

self.disable))

370

self.enabled = True

371

# Also start a new checker *right now*.

372

self.start_checker()

878

self.init_checker()

879

self.send_changedstate()

373

880

374

881

def disable(self, quiet=True):

375

882

"""Disable this client."""

376

883

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

377

884

return False

378

885

if not quiet:

379

self.send_changedstate()

380

if not quiet:

381

886

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

382

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

887

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

383

888

gobject.source_remove(self.disable_initiator_tag)

384

889

self.disable_initiator_tag = None

385

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

890

self.expires = None

891

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

386

892

gobject.source_remove(self.checker_initiator_tag)

387

893

self.checker_initiator_tag = None

388

894

self.stop_checker()

389

if self.disable_hook:

390

self.disable_hook(self)

391

895

self.enabled = False

896

if not quiet:

897

self.send_changedstate()

392

898

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

393

899

return False

394

900

395

901

def __del__(self):

396

self.disable_hook = None

397

902

self.disable()

398

903

399

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):

400

922

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

401

923

self.checker_callback_tag = None

402

924

self.checker = None

403

if os.WIFEXITED(condition):

404

exitstatus = os.WEXITSTATUS(condition)

405

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:

406

933

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

407

934

vars(self))

408

935

self.checked_ok()

409

936

else:

410

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

411

vars(self))

937

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

412

938

else:

939

self.last_checker_status = -1

940

self.last_checker_signal = -returncode

413

941

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

414

942

vars(self))

943

return False

415

944

416

945

def checked_ok(self):

417

"""Bump up the timeout for this client.

418

419

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

420

alive and well.

421

"""

946

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

422

947

self.last_checked_ok = datetime.datetime.utcnow()

423

gobject.source_remove(self.disable_initiator_tag)

424

self.disable_initiator_tag = (gobject.timeout_add

425

(self.timeout_milliseconds(),

426

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

427

963

428

964

def need_approval(self):

429

965

self.last_approval_request = datetime.datetime.utcnow()

434

970

If a checker already exists, leave it running and do

435

971

nothing."""

436

972

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

437

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

438

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

439

# client would inevitably timeout, since no checker would get

440

# 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

441

977

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

442

978

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

443

979

# should be.

444

980

445

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

446

try:

447

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

448

except (AttributeError, OSError), error:

449

if (isinstance(error, OSError)

450

and error.errno != errno.ECHILD):

451

raise error

452

else:

453

if pid:

454

logger.warning("Checker was a zombie")

455

gobject.source_remove(self.checker_callback_tag)

456

self.checker_callback(pid, status,

457

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

458

985

# Start a new checker if needed

459

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 }

460

991

try:

461

# In case checker_command has exactly one % operator

462

command = self.checker_command % self.host

463

except TypeError:

464

# Escape attributes for the shell

465

escaped_attrs = dict(

466

(attr,

467

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

468

errors=

469

'replace')))

470

for attr in

471

self.runtime_expansions)

472

473

try:

474

command = self.checker_command % escaped_attrs

475

except TypeError, error:

476

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

477

' %s', self.checker_command, error)

478

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

479

998

self.current_checker_command = command

480

try:

481

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

482

command, self.name)

483

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

484

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

485

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

486

# always replaced by /dev/null.)

487

self.checker = subprocess.Popen(command,

488

close_fds=True,

489

shell=True, cwd="/")

490

self.checker_callback_tag = (gobject.child_watch_add

491

(self.checker.pid,

492

self.checker_callback,

493

data=command))

494

# The checker may have completed before the gobject

495

# watch was added. Check for this.

496

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

497

if pid:

498

gobject.source_remove(self.checker_callback_tag)

499

self.checker_callback(pid, status, command)

500

except OSError, error:

501

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

502

error)

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)

503

1024

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

504

1025

return True

505

1026

511

1032

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

512

1033

return

513

1034

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

514

try:

515

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

516

#time.sleep(0.5)

517

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

518

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

519

except OSError, error:

520

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

521

raise

1035

self.checker.terminate()

522

1036

self.checker = None

523

1037

524

def dbus_service_property(dbus_interface, signature="v",

525

access="readwrite", byte_arrays=False):

1038

1039

def dbus_service_property(dbus_interface,

1040

signature="v",

1041

access="readwrite",

1042

byte_arrays=False):

526

1043

"""Decorators for marking methods of a DBusObjectWithProperties to

527

1044

become properties on the D-Bus.

528

1045

537

1054

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

538

1055

if byte_arrays and signature != "ay":

539

1056

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

540

" signature %r" % signature)

1057

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

1058

541

1059

def decorator(func):

542

1060

func._dbus_is_property = True

543

1061

func._dbus_interface = dbus_interface

548

1066

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

549

1067

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

550

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

551

1113

return decorator

552

1114

553

1115

554

1116

class DBusPropertyException(dbus.exceptions.DBusException):

555

1117

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

556

1118

"""

557

def __unicode__(self):

558

return unicode(str(self))

1119

pass

559

1120

560

1121

561

1122

class DBusPropertyAccessException(DBusPropertyException):

570

1131

pass

571

1132

572

1133

573

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):

574

1224

"""A D-Bus object with properties.

575

1225

576

1226

Classes inheriting from this can use the dbus_service_property

577

1227

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

578

1228

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

579

1229

"""

580

1230

581

@staticmethod

582

def _is_dbus_property(obj):

583

return getattr(obj, "_dbus_is_property", False)

584

585

def _get_all_dbus_properties(self):

586

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

587

"""

588

return ((prop._dbus_name, prop)

589

for name, prop in

590

inspect.getmembers(self, self._is_dbus_property))

591

592

1231

def _get_dbus_property(self, interface_name, property_name):

593

1232

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

594

1233

property with the specified name and interface.

595

1234

"""

596

for name in (property_name,

597

property_name + "_dbus_property"):

598

prop = getattr(self, name, None)

599

if (prop is None

600

or not self._is_dbus_property(prop)

601

or prop._dbus_name != property_name

602

or (interface_name and prop._dbus_interface

603

and interface_name != prop._dbus_interface)):

604

continue

605

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

606

1242

# No such property

607

raise DBusPropertyNotFound(self.dbus_object_path + ":"

608

+ interface_name + "."

609

+ property_name)

610

611

@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",

612

1257

out_signature="v")

613

1258

def Get(self, interface_name, property_name):

614

1259

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

632

1277

# The byte_arrays option is not supported yet on

633

1278

# signatures other than "ay".

634

1279

if prop._dbus_signature != "ay":

635

raise ValueError

636

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

637

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))

638

1285

prop(value)

639

1286

640

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

1287

@dbus.service.method(dbus.PROPERTIES_IFACE,

1288

in_signature="s",

641

1289

out_signature="a{sv}")

642

1290

def GetAll(self, interface_name):

643

1291

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

644

1292

standard.

645

1293

646

1294

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

647

1295

"""

648

all = {}

649

for name, prop in self._get_all_dbus_properties():

1296

properties = {}

1297

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

650

1298

if (interface_name

651

1299

and interface_name != prop._dbus_interface):

652

1300

# Interface non-empty but did not match

656

1304

continue

657

1305

value = prop()

658

1306

if not hasattr(value, "variant_level"):

659

all[name] = value

1307

properties[name] = value

660

1308

continue

661

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

662

value.variant_level+1)

663

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

664

1320

665

1321

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

666

1322

out_signature="s",

667

1323

path_keyword='object_path',

668

1324

connection_keyword='connection')

669

1325

def Introspect(self, object_path, connection):

670

"""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.

671

1329

"""

672

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

673

connection)

1330

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1331

object_path,

1332

connection)

674

1333

try:

675

1334

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

1335

676

1336

def make_tag(document, name, prop):

677

1337

e = document.createElement("property")

678

1338

e.setAttribute("name", name)

679

1339

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

680

1340

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

681

1341

return e

1342

682

1343

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

1344

# Add property tags

683

1345

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

684

1346

for name, prop

685

in self._get_all_dbus_properties()

1347

in self._get_all_dbus_things("property")

686

1348

if prop._dbus_interface

687

1349

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

688

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)

689

1367

# Add the names to the return values for the

690

1368

# "org.freedesktop.DBus.Properties" methods

691

1369

if (if_tag.getAttribute("name")

704

1382

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

705

1383

document.unlink()

706

1384

except (AttributeError, xml.dom.DOMException,

707

xml.parsers.expat.ExpatError), error:

708

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

709

error)

710

return xmlstring

711

712

1385

xml.parsers.expat.ExpatError) as error:

1386

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

1387

exc_info=error)

1388

return xmlstring

1389

1390

try:

1391

dbus.OBJECT_MANAGER_IFACE

1392

except AttributeError:

1393

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

1394

1395

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1396

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

1397

1398

Classes inheriting from this exposes the standard

1399

GetManagedObjects call and the InterfacesAdded and

1400

InterfacesRemoved signals on the standard

1401

"org.freedesktop.DBus.ObjectManager" interface.

1402

1403

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

1404

manually.

1405

"""

1406

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1407

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

1408

def GetManagedObjects(self):

1409

"""This function must be overridden"""

1410

raise NotImplementedError()

1411

1412

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1413

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

1414

def InterfacesAdded(self, object_path, interfaces_and_properties):

1415

pass

1416

1417

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

1418

def InterfacesRemoved(self, object_path, interfaces):

1419

pass

1420

1421

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1422

out_signature = "s",

1423

path_keyword = 'object_path',

1424

connection_keyword = 'connection')

1425

def Introspect(self, object_path, connection):

1426

"""Overloading of standard D-Bus method.

1427

1428

Override return argument name of GetManagedObjects to be

1429

"objpath_interfaces_and_properties"

1430

"""

1431

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1432

object_path,

1433

connection)

1434

try:

1435

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

1436

1437

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

1438

# Fix argument name for the GetManagedObjects method

1439

if (if_tag.getAttribute("name")

1440

== dbus.OBJECT_MANAGER_IFACE):

1441

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

1442

if (cn.getAttribute("name")

1443

== "GetManagedObjects"):

1444

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

1445

if (arg.getAttribute("direction")

1446

== "out"):

1447

arg.setAttribute(

1448

"name",

1449

"objpath_interfaces"

1450

"_and_properties")

1451

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

1452

document.unlink()

1453

except (AttributeError, xml.dom.DOMException,

1454

xml.parsers.expat.ExpatError) as error:

1455

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

1456

exc_info = error)

1457

return xmlstring

1458

1459

def datetime_to_dbus(dt, variant_level=0):

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"})

713

1654

class ClientDBus(Client, DBusObjectWithProperties):

714

1655

"""A Client class using D-Bus

715

1656

719

1660

"""

720

1661

721

1662

runtime_expansions = (Client.runtime_expansions

722

+ ("dbus_object_path",))

1663

+ ("dbus_object_path", ))

1664

1665

_interface = "se.recompile.Mandos.Client"

723

1666

724

1667

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

725

1668

726

1669

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

727

self._approvals_pending = 0

728

1670

self.bus = bus

729

1671

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

730

1672

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

731

1673

# the D-Bus

732

client_object_name = unicode(self.name).translate(

1674

client_object_name = str(self.name).translate(

733

1675

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

734

1676

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

735

self.dbus_object_path = (dbus.ObjectPath

736

("/clients/" + client_object_name))

1677

self.dbus_object_path = dbus.ObjectPath(

1678

"/clients/" + client_object_name)

737

1679

DBusObjectWithProperties.__init__(self, self.bus,

738

1680

self.dbus_object_path)

739

740

def _get_approvals_pending(self):

741

return self._approvals_pending

742

def _set_approvals_pending(self, value):

743

old_value = self._approvals_pending

744

self._approvals_pending = value

745

bval = bool(value)

746

if (hasattr(self, "dbus_object_path")

747

and bval is not bool(old_value)):

748

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

749

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

750

dbus_bool)

751

752

approvals_pending = property(_get_approvals_pending,

753

_set_approvals_pending)

754

del _get_approvals_pending, _set_approvals_pending

755

756

@staticmethod

757

def _datetime_to_dbus(dt, variant_level=0):

758

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

759

return dbus.String(dt.isoformat(),

760

variant_level=variant_level)

761

762

def enable(self):

763

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

764

r = Client.enable(self)

765

if oldstate != self.enabled:

766

# Emit D-Bus signals

767

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

768

dbus.Boolean(True, variant_level=1))

769

self.PropertyChanged(

770

dbus.String("LastEnabled"),

771

self._datetime_to_dbus(self.last_enabled,

772

variant_level=1))

773

return r

774

775

def disable(self, quiet = False):

776

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

777

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

778

if not quiet and oldstate != self.enabled:

779

# Emit D-Bus signal

780

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

781

dbus.Boolean(False, variant_level=1))

782

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

783

1762

784

1763

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

785

1764

try:

790

1769

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

791

1770

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

792

1771

793

def checker_callback(self, pid, condition, command,

794

*args, **kwargs):

795

self.checker_callback_tag = None

796

self.checker = None

797

# Emit D-Bus signal

798

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

799

dbus.Boolean(False, variant_level=1))

800

if os.WIFEXITED(condition):

801

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:

802

1779

# Emit D-Bus signal

803

1780

self.CheckerCompleted(dbus.Int16(exitstatus),

804

dbus.Int64(condition),

1781

# This is specific to GNU libC

1782

dbus.Int64(exitstatus << 8),

805

1783

dbus.String(command))

806

1784

else:

807

1785

# Emit D-Bus signal

808

1786

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

809

dbus.Int64(condition),

1787

dbus.Int64(

1788

# This is specific to GNU libC

1789

(exitstatus << 8)

1790

| self.last_checker_signal),

810

1791

dbus.String(command))

811

812

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

813

*args, **kwargs)

814

815

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

816

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

817

# Emit D-Bus signal

818

self.PropertyChanged(

819

dbus.String("LastCheckedOK"),

820

(self._datetime_to_dbus(self.last_checked_ok,

821

variant_level=1)))

822

return r

823

824

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

825

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

826

# Emit D-Bus signal

827

self.PropertyChanged(

828

dbus.String("LastApprovalRequest"),

829

(self._datetime_to_dbus(self.last_approval_request,

830

variant_level=1)))

831

return r

1792

return ret

832

1793

833

1794

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

834

old_checker = self.checker

835

if self.checker is not None:

836

old_checker_pid = self.checker.pid

837

else:

838

old_checker_pid = None

1795

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

839

1796

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

840

1797

# Only if new checker process was started

841

1798

if (self.checker is not None

842

1799

and old_checker_pid != self.checker.pid):

843

1800

# Emit D-Bus signal

844

1801

self.CheckerStarted(self.current_checker_command)

845

self.PropertyChanged(

846

dbus.String("CheckerRunning"),

847

dbus.Boolean(True, variant_level=1))

848

1802

return r

849

1803

850

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

851

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

852

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

853

if (old_checker is not None

854

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

855

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

856

dbus.Boolean(False, variant_level=1))

857

return r

858

859

1804

def _reset_approved(self):

860

self._approved = None

1805

self.approved = None

861

1806

return False

862

1807

863

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)

864

1812

self.send_changedstate()

865

self._approved = value

866

gobject.timeout_add(self._timedelta_to_milliseconds

867

(self.approval_duration),

868

self._reset_approved)

869

870

1813

871

1814

## D-Bus methods, signals & properties

872

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

1815

1816

## Interfaces

873

1817

874

1818

## Signals

875

1819

886

1830

pass

887

1831

888

1832

# PropertyChanged - signal

1833

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

889

1834

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

890

1835

def PropertyChanged(self, property, value):

891

1836

"D-Bus signal"

922

1867

# CheckedOK - method

923

1868

@dbus.service.method(_interface)

924

1869

def CheckedOK(self):

925

return self.checked_ok()

1870

self.checked_ok()

926

1871

927

1872

# Enable - method

1873

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

928

1874

@dbus.service.method(_interface)

929

1875

def Enable(self):

930

1876

"D-Bus method"

931

1877

self.enable()

932

1878

933

1879

# StartChecker - method

1880

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

934

1881

@dbus.service.method(_interface)

935

1882

def StartChecker(self):

936

1883

"D-Bus method"

937

1884

self.start_checker()

938

1885

939

1886

# Disable - method

1887

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

940

1888

@dbus.service.method(_interface)

941

1889

def Disable(self):

942

1890

"D-Bus method"

943

1891

self.disable()

944

1892

945

1893

# StopChecker - method

1894

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

946

1895

@dbus.service.method(_interface)

947

1896

def StopChecker(self):

948

1897

self.stop_checker()

955

1904

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

956

1905

957

1906

# ApprovedByDefault - property

958

@dbus_service_property(_interface, signature="b",

1907

@dbus_service_property(_interface,

1908

signature="b",

959

1909

access="readwrite")

960

1910

def ApprovedByDefault_dbus_property(self, value=None):

961

1911

if value is None: # get

962

1912

return dbus.Boolean(self.approved_by_default)

963

1913

self.approved_by_default = bool(value)

964

# Emit D-Bus signal

965

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

966

dbus.Boolean(value, variant_level=1))

967

1914

968

1915

# ApprovalDelay - property

969

@dbus_service_property(_interface, signature="t",

1916

@dbus_service_property(_interface,

1917

signature="t",

970

1918

access="readwrite")

971

1919

def ApprovalDelay_dbus_property(self, value=None):

972

1920

if value is None: # get

973

return dbus.UInt64(self.approval_delay_milliseconds())

1921

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

1922

* 1000)

974

1923

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

975

# Emit D-Bus signal

976

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

977

dbus.UInt64(value, variant_level=1))

978

1924

979

1925

# ApprovalDuration - property

980

@dbus_service_property(_interface, signature="t",

1926

@dbus_service_property(_interface,

1927

signature="t",

981

1928

access="readwrite")

982

1929

def ApprovalDuration_dbus_property(self, value=None):

983

1930

if value is None: # get

984

return dbus.UInt64(self._timedelta_to_milliseconds(

985

self.approval_duration))

1931

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

1932

* 1000)

986

1933

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

987

# Emit D-Bus signal

988

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

989

dbus.UInt64(value, variant_level=1))

990

1934

991

1935

# Name - property

1936

@dbus_annotations(

1937

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

992

1938

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

993

1939

def Name_dbus_property(self):

994

1940

return dbus.String(self.name)

995

1941

996

1942

# Fingerprint - property

1943

@dbus_annotations(

1944

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

997

1945

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

998

1946

def Fingerprint_dbus_property(self):

999

1947

return dbus.String(self.fingerprint)

1000

1948

1001

1949

# Host - property

1002

@dbus_service_property(_interface, signature="s",

1950

@dbus_service_property(_interface,

1951

signature="s",

1003

1952

access="readwrite")

1004

1953

def Host_dbus_property(self, value=None):

1005

1954

if value is None: # get

1006

1955

return dbus.String(self.host)

1007

self.host = value

1008

# Emit D-Bus signal

1009

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

1010

dbus.String(value, variant_level=1))

1956

self.host = str(value)

1011

1957

1012

1958

# Created - property

1959

@dbus_annotations(

1960

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

1013

1961

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

1014

1962

def Created_dbus_property(self):

1015

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

1963

return datetime_to_dbus(self.created)

1016

1964

1017

1965

# LastEnabled - property

1018

1966

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

1019

1967

def LastEnabled_dbus_property(self):

1020

if self.last_enabled is None:

1021

return dbus.String("")

1022

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

1968

return datetime_to_dbus(self.last_enabled)

1023

1969

1024

1970

# Enabled - property

1025

@dbus_service_property(_interface, signature="b",

1971

@dbus_service_property(_interface,

1972

signature="b",

1026

1973

access="readwrite")

1027

1974

def Enabled_dbus_property(self, value=None):

1028

1975

if value is None: # get

1033

1980

self.disable()

1034

1981

1035

1982

# LastCheckedOK - property

1036

@dbus_service_property(_interface, signature="s",

1983

@dbus_service_property(_interface,

1984

signature="s",

1037

1985

access="readwrite")

1038

1986

def LastCheckedOK_dbus_property(self, value=None):

1039

1987

if value is not None:

1040

1988

self.checked_ok()

1041

1989

return

1042

if self.last_checked_ok is None:

1043

return dbus.String("")

1044

return dbus.String(self._datetime_to_dbus(self

1045

.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)

1046

2001

1047

2002

# LastApprovalRequest - property

1048

2003

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

1049

2004

def LastApprovalRequest_dbus_property(self):

1050

if self.last_approval_request is None:

1051

return dbus.String("")

1052

return dbus.String(self.

1053

_datetime_to_dbus(self

1054

.last_approval_request))

2005

return datetime_to_dbus(self.last_approval_request)

1055

2006

1056

2007

# Timeout - property

1057

@dbus_service_property(_interface, signature="t",

2008

@dbus_service_property(_interface,

2009

signature="t",

1058

2010

access="readwrite")

1059

2011

def Timeout_dbus_property(self, value=None):

1060

2012

if value is None: # get

1061

return dbus.UInt64(self.timeout_milliseconds())

2013

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

2014

old_timeout = self.timeout

1062

2015

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

1063

# Emit D-Bus signal

1064

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

1065

dbus.UInt64(value, variant_level=1))

1066

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

1067

return

1068

# Reschedule timeout

1069

gobject.source_remove(self.disable_initiator_tag)

1070

self.disable_initiator_tag = None

1071

time_to_die = (self.

1072

_timedelta_to_milliseconds((self

1073

.last_checked_ok

1074

+ self.timeout)

1075

- datetime.datetime

1076

.utcnow()))

1077

if time_to_die <= 0:

1078

# The timeout has passed

1079

self.disable()

1080

else:

1081

self.disable_initiator_tag = (gobject.timeout_add

1082

(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)

1083

2041

1084

2042

# Interval - property

1085

@dbus_service_property(_interface, signature="t",

2043

@dbus_service_property(_interface,

2044

signature="t",

1086

2045

access="readwrite")

1087

2046

def Interval_dbus_property(self, value=None):

1088

2047

if value is None: # get

1089

return dbus.UInt64(self.interval_milliseconds())

2048

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

1090

2049

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

1091

# Emit D-Bus signal

1092

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

1093

dbus.UInt64(value, variant_level=1))

1094

2050

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

1095

2051

return

1096

# Reschedule checker run

1097

gobject.source_remove(self.checker_initiator_tag)

1098

self.checker_initiator_tag = (gobject.timeout_add

1099

(value, self.start_checker))

1100

self.start_checker() # Start one now, too

1101

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

1102

2059

# Checker - property

1103

@dbus_service_property(_interface, signature="s",

2060

@dbus_service_property(_interface,

2061

signature="s",

1104

2062

access="readwrite")

1105

2063

def Checker_dbus_property(self, value=None):

1106

2064

if value is None: # get

1107

2065

return dbus.String(self.checker_command)

1108

self.checker_command = value

1109

# Emit D-Bus signal

1110

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

1111

dbus.String(self.checker_command,

1112

variant_level=1))

2066

self.checker_command = str(value)

1113

2067

1114

2068

# CheckerRunning - property

1115

@dbus_service_property(_interface, signature="b",

2069

@dbus_service_property(_interface,

2070

signature="b",

1116

2071

access="readwrite")

1117

2072

def CheckerRunning_dbus_property(self, value=None):

1118

2073

if value is None: # get

1123

2078

self.stop_checker()

1124

2079

1125

2080

# ObjectPath - property

2081

@dbus_annotations(

2082

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

2083

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

1126

2084

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

1127

2085

def ObjectPath_dbus_property(self):

1128

2086

return self.dbus_object_path # is already a dbus.ObjectPath

1129

2087

1130

2088

# Secret = property

1131

@dbus_service_property(_interface, signature="ay",

1132

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)

1133

2096

def Secret_dbus_property(self, value):

1134

self.secret = str(value)

2097

self.secret = bytes(value)

1135

2098

1136

2099

del _interface

1137

2100

1141

2104

self._pipe = child_pipe

1142

2105

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

1143

2106

if not self._pipe.recv():

1144

raise KeyError()

1145

2107

raise KeyError(fpr)

2108

1146

2109

def __getattribute__(self, name):

1147

if(name == '_pipe'):

2110

if name == '_pipe':

1148

2111

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

1149

2112

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

1150

2113

data = self._pipe.recv()

1151

2114

if data[0] == 'data':

1152

2115

return data[1]

1153

2116

if data[0] == 'function':

2117

1154

2118

def func(*args, **kwargs):

1155

2119

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

1156

2120

return self._pipe.recv()[1]

2121

1157

2122

return func

1158

2123

1159

2124

def __setattr__(self, name, value):

1160

if(name == '_pipe'):

2125

if name == '_pipe':

1161

2126

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

1162

2127

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

1163

2128

1171

2136

def handle(self):

1172

2137

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

1173

2138

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

1174

unicode(self.client_address))

2139

str(self.client_address))

1175

2140

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

1176

2141

self.server.child_pipe.fileno())

1177

1178

session = (gnutls.connection

1179

.ClientSession(self.request,

1180

gnutls.connection

1181

.X509Credentials()))

1182

1183

# Note: gnutls.connection.X509Credentials is really a

1184

# generic GnuTLS certificate credentials object so long as

1185

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

1186

# here despite using OpenPGP certificates.

1187

2142

2143

session = gnutls.ClientSession(self.request)

2144

1188

2145

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

1189

2146

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

1190

2147

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

1193

2150

priority = self.server.gnutls_priority

1194

2151

if priority is None:

1195

2152

priority = "NORMAL"

1196

(gnutls.library.functions

1197

.gnutls_priority_set_direct(session._c_object,

1198

priority, None))

1199

2153

gnutls.priority_set_direct(session._c_object, priority,

2154

None)

2155

1200

2156

# Start communication using the Mandos protocol

1201

2157

# Get protocol number

1202

2158

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

1203

2159

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

1204

2160

try:

1205

2161

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

1206

raise RuntimeError

1207

except (ValueError, IndexError, RuntimeError), error:

2162

raise RuntimeError(line)

2163

except (ValueError, IndexError, RuntimeError) as error:

1208

2164

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

1209

2165

return

1210

2166

1211

2167

# Start GnuTLS connection

1212

2168

try:

1213

2169

session.handshake()

1214

except gnutls.errors.GNUTLSError, error:

2170

except gnutls.Error as error:

1215

2171

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

1216

2172

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

1217

2173

# established. Just abandon the request.

1218

2174

return

1219

2175

logger.debug("Handshake succeeded")

1220

2176

1221

2177

approval_required = False

1222

2178

try:

1223

2179

try:

1224

fpr = self.fingerprint(self.peer_certificate

1225

(session))

1226

except (TypeError, gnutls.errors.GNUTLSError), error:

2180

fpr = self.fingerprint(

2181

self.peer_certificate(session))

2182

except (TypeError, gnutls.Error) as error:

1227

2183

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

1228

2184

return

1229

2185

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

1230

2186

1231

2187

try:

1232

2188

client = ProxyClient(child_pipe, fpr,

1233

2189

self.client_address)

1241

2197

1242

2198

while True:

1243

2199

if not client.enabled:

1244

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

1245

client.name)

2200

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

2201

client.name)

1246

2202

if self.server.use_dbus:

1247

2203

# Emit D-Bus signal

1248

client.Rejected("Disabled")

2204

client.Rejected("Disabled")

1249

2205

return

1250

2206

1251

if client._approved or not client.approval_delay:

2207

if client.approved or not client.approval_delay:

1252

2208

#We are approved or approval is disabled

1253

2209

break

1254

elif client._approved is None:

2210

elif client.approved is None:

1255

2211

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

1256

2212

client.name)

1257

2213

if self.server.use_dbus:

1258

2214

# Emit D-Bus signal

1259

2215

client.NeedApproval(

1260

client.approval_delay_milliseconds(),

1261

client.approved_by_default)

2216

client.approval_delay.total_seconds()

2217

* 1000, client.approved_by_default)

1262

2218

else:

1263

2219

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

1264

2220

client.name)

1268

2224

return

1269

2225

1270

2226

#wait until timeout or approved

1271

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

1272

2227

time = datetime.datetime.now()

1273

2228

client.changedstate.acquire()

1274

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

2229

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

1275

2230

client.changedstate.release()

1276

2231

time2 = datetime.datetime.now()

1277

2232

if (time2 - time) >= delay:

1288

2243

else:

1289

2244

delay -= time2 - time

1290

2245

1291

sent_size = 0

1292

while sent_size < len(client.secret):

1293

try:

1294

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

1295

except (gnutls.errors.GNUTLSError), error:

1296

logger.warning("gnutls send failed")

1297

return

1298

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

1299

sent, len(client.secret)

1300

- (sent_size + sent))

1301

sent_size += sent

1302

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

1303

2253

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

1304

# bump the timeout as if seen

1305

client.checked_ok()

2254

# bump the timeout using extended_timeout

2255

client.bump_timeout(client.extended_timeout)

1306

2256

if self.server.use_dbus:

1307

2257

# Emit D-Bus signal

1308

2258

client.GotSecret()

1312

2262

client.approvals_pending -= 1

1313

2263

try:

1314

2264

session.bye()

1315

except (gnutls.errors.GNUTLSError), error:

1316

logger.warning("GnuTLS bye failed")

2265

except gnutls.Error as error:

2266

logger.warning("GnuTLS bye failed",

2267

exc_info=error)

1317

2268

1318

2269

@staticmethod

1319

2270

def peer_certificate(session):

1320

2271

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

1321

2272

# If not an OpenPGP certificate...

1322

if (gnutls.library.functions

1323

.gnutls_certificate_type_get(session._c_object)

1324

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1325

# ...do the normal thing

1326

return session.peer_certificate

2273

if (gnutls.certificate_type_get(session._c_object)

2274

!= gnutls.CRT_OPENPGP):

2275

# ...return invalid data

2276

return b""

1327

2277

list_size = ctypes.c_uint(1)

1328

cert_list = (gnutls.library.functions

1329

.gnutls_certificate_get_peers

2278

cert_list = (gnutls.certificate_get_peers

1330

2279

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

1331

2280

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

1332

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

1333

" certificate")

2281

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

1334

2282

if list_size.value == 0:

1335

2283

return None

1336

2284

cert = cert_list[0]

1340

2288

def fingerprint(openpgp):

1341

2289

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1342

2290

# New GnuTLS "datum" with the OpenPGP public key

1343

datum = (gnutls.library.types

1344

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

1345

ctypes.POINTER

1346

(ctypes.c_ubyte)),

1347

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)))

1348

2295

# New empty GnuTLS certificate

1349

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1350

(gnutls.library.functions

1351

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2296

crt = gnutls.openpgp_crt_t()

2297

gnutls.openpgp_crt_init(ctypes.byref(crt))

1352

2298

# Import the OpenPGP public key into the certificate

1353

(gnutls.library.functions

1354

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

1355

gnutls.library.constants

1356

.GNUTLS_OPENPGP_FMT_RAW))

2299

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

2300

gnutls.OPENPGP_FMT_RAW)

1357

2301

# Verify the self signature in the key

1358

2302

crtverify = ctypes.c_uint()

1359

(gnutls.library.functions

1360

.gnutls_openpgp_crt_verify_self(crt, 0,

1361

ctypes.byref(crtverify)))

2303

gnutls.openpgp_crt_verify_self(crt, 0,

2304

ctypes.byref(crtverify))

1362

2305

if crtverify.value != 0:

1363

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1364

raise (gnutls.errors.CertificateSecurityError

1365

("Verify failed"))

2306

gnutls.openpgp_crt_deinit(crt)

2307

raise gnutls.CertificateSecurityError("Verify failed")

1366

2308

# New buffer for the fingerprint

1367

2309

buf = ctypes.create_string_buffer(20)

1368

2310

buf_len = ctypes.c_size_t()

1369

2311

# Get the fingerprint from the certificate into the buffer

1370

(gnutls.library.functions

1371

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

1372

ctypes.byref(buf_len)))

2312

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

2313

ctypes.byref(buf_len))

1373

2314

# Deinit the certificate

1374

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2315

gnutls.openpgp_crt_deinit(crt)

1375

2316

# Convert the buffer to a Python bytestring

1376

2317

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

1377

2318

# Convert the bytestring to hexadecimal notation

1378

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

2319

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

1379

2320

return hex_fpr

1380

2321

1381

2322

1382

2323

class MultiprocessingMixIn(object):

1383

2324

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

2325

1384

2326

def sub_process_main(self, request, address):

1385

2327

try:

1386

2328

self.finish_request(request, address)

1387

except:

2329

except Exception:

1388

2330

self.handle_error(request, address)

1389

2331

self.close_request(request)

1390

2332

1391

2333

def process_request(self, request, address):

1392

2334

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

1393

multiprocessing.Process(target = self.sub_process_main,

1394

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

2335

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

2336

args = (request, address))

2337

proc.start()

2338

return proc

2339

1395

2340

1396

2341

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1397

2342

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

2343

1398

2344

def process_request(self, request, client_address):

1399

2345

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

1400

2346

1401

2347

This function creates a new pipe in self.pipe

1402

2348

"""

1403

2349

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1404

1405

super(MultiprocessingMixInWithPipe,

1406

self).process_request(request, client_address)

2350

2351

proc = MultiprocessingMixIn.process_request(self, request,

2352

client_address)

1407

2353

self.child_pipe.close()

1408

self.add_pipe(parent_pipe)

1409

1410

def add_pipe(self, parent_pipe):

2354

self.add_pipe(parent_pipe, proc)

2355

2356

def add_pipe(self, parent_pipe, proc):

1411

2357

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

1412

raise NotImplementedError

2358

raise NotImplementedError()

2359

1413

2360

1414

2361

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1415

2362

socketserver.TCPServer, object):

1420

2367

interface: None or a network interface name (string)

1421

2368

use_ipv6: Boolean; to use IPv6 or not

1422

2369

"""

2370

1423

2371

def __init__(self, server_address, RequestHandlerClass,

1424

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

"""

1425

2378

self.interface = interface

1426

2379

if use_ipv6:

1427

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.

1428

2407

socketserver.TCPServer.__init__(self, server_address,

1429

2408

RequestHandlerClass)

2409

1430

2410

def server_bind(self):

1431

2411

"""This overrides the normal server_bind() function

1432

2412

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

1438

2418

self.interface)

1439

2419

else:

1440

2420

try:

1441

self.socket.setsockopt(socket.SOL_SOCKET,

1442

SO_BINDTODEVICE,

1443

str(self.interface

1444

+ '\0'))

1445

except socket.error, error:

1446

if error[0] == errno.EPERM:

1447

logger.error("No permission to"

1448

" bind to interface %s",

1449

self.interface)

1450

elif error[0] == errno.ENOPROTOOPT:

2421

self.socket.setsockopt(

2422

socket.SOL_SOCKET, SO_BINDTODEVICE,

2423

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

2424

except socket.error as error:

2425

if error.errno == errno.EPERM:

2426

logger.error("No permission to bind to"

2427

" interface %s", self.interface)

2428

elif error.errno == errno.ENOPROTOOPT:

1451

2429

logger.error("SO_BINDTODEVICE not available;"

1452

2430

" cannot bind to interface %s",

1453

2431

self.interface)

2432

elif error.errno == errno.ENODEV:

2433

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

2434

" cannot bind", self.interface)

1454

2435

else:

1455

2436

raise

1456

2437

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

1459

2440

if self.address_family == socket.AF_INET6:

1460

2441

any_address = "::" # in6addr_any

1461

2442

else:

1462

any_address = socket.INADDR_ANY

2443

any_address = "0.0.0.0" # INADDR_ANY

1463

2444

self.server_address = (any_address,

1464

2445

self.server_address[1])

1465

2446

elif not self.server_address[1]:

1466

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

1467

0)

2447

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

1468

2448

# if self.interface:

1469

2449

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

1470

2450

# 0, # port

1484

2464

1485

2465

Assumes a gobject.MainLoop event loop.

1486

2466

"""

2467

1487

2468

def __init__(self, server_address, RequestHandlerClass,

1488

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

1489

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):

1490

2475

self.enabled = False

1491

2476

self.clients = clients

1492

2477

if self.clients is None:

1493

self.clients = set()

2478

self.clients = {}

1494

2479

self.use_dbus = use_dbus

1495

2480

self.gnutls_priority = gnutls_priority

1496

2481

IPv6_TCPServer.__init__(self, server_address,

1497

2482

RequestHandlerClass,

1498

2483

interface = interface,

1499

use_ipv6 = use_ipv6)

2484

use_ipv6 = use_ipv6,

2485

socketfd = socketfd)

2486

1500

2487

def server_activate(self):

1501

2488

if self.enabled:

1502

2489

return socketserver.TCPServer.server_activate(self)

2490

1503

2491

def enable(self):

1504

2492

self.enabled = True

1505

def add_pipe(self, parent_pipe):

2493

2494

def add_pipe(self, parent_pipe, proc):

1506

2495

# Call "handle_ipc" for both data and EOF events

1507

gobject.io_add_watch(parent_pipe.fileno(),

1508

gobject.IO_IN | gobject.IO_HUP,

1509

functools.partial(self.handle_ipc,

1510

parent_pipe = parent_pipe))

1511

1512

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,

1513

2506

client_object=None):

1514

condition_names = {

1515

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

1516

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

1517

# blocking).

1518

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

1519

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

1520

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

1521

# broken, usually for pipes and

1522

# sockets).

1523

}

1524

conditions_string = ' | '.join(name

1525

for cond, name in

1526

condition_names.iteritems()

1527

if cond & condition)

1528

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

1529

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()

1530

2511

return False

1531

2512

1532

2513

# Read a request from the child

1537

2518

fpr = request[1]

1538

2519

address = request[2]

1539

2520

1540

for c in self.clients:

2521

for c in self.clients.itervalues():

1541

2522

if c.fingerprint == fpr:

1542

2523

client = c

1543

2524

break

1544

2525

else:

1545

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

1546

"dress: %s", fpr, address)

2526

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

2527

"dress: %s", fpr, address)

1547

2528

if self.use_dbus:

1548

2529

# Emit D-Bus signal

1549

mandos_dbus_service.ClientNotFound(fpr, address[0])

2530

mandos_dbus_service.ClientNotFound(fpr,

2531

address[0])

1550

2532

parent_pipe.send(False)

1551

2533

return False

1552

2534

1553

gobject.io_add_watch(parent_pipe.fileno(),

1554

gobject.IO_IN | gobject.IO_HUP,

1555

functools.partial(self.handle_ipc,

1556

parent_pipe = parent_pipe,

1557

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))

1558

2542

parent_pipe.send(True)

1559

# 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

1560

2545

return False

1561

2546

if command == 'funcall':

1562

2547

funcname = request[1]

1563

2548

args = request[2]

1564

2549

kwargs = request[3]

1565

2550

1566

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

1567

2551

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

2552

funcname)(*args,

2553

**kwargs)))

2554

1568

2555

if command == 'getattr':

1569

2556

attrname = request[1]

1570

if callable(client_object.__getattribute__(attrname)):

1571

parent_pipe.send(('function',))

2557

if isinstance(client_object.__getattribute__(attrname),

2558

collections.Callable):

2559

parent_pipe.send(('function', ))

1572

2560

else:

1573

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

2561

parent_pipe.send((

2562

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

1574

2563

1575

2564

if command == 'setattr':

1576

2565

attrname = request[1]

1577

2566

value = request[2]

1578

2567

setattr(client_object, attrname, value)

1579

2568

1580

2569

return True

1581

2570

1582

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

1583

2668

def string_to_delta(interval):

1584

2669

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

1585

2670

1596

2681

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

1597

2682

datetime.timedelta(0, 330)

1598

2683

"""

2684

2685

try:

2686

return rfc3339_duration_to_delta(interval)

2687

except ValueError:

2688

pass

2689

1599

2690

timevalue = datetime.timedelta(0)

1600

2691

for s in interval.split():

1601

2692

try:

1602

suffix = unicode(s[-1])

2693

suffix = s[-1]

1603

2694

value = int(s[:-1])

1604

2695

if suffix == "d":

1605

2696

delta = datetime.timedelta(value)

1612

2703

elif suffix == "w":

1613

2704

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

1614

2705

else:

1615

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

1616

except (ValueError, IndexError), e:

2706

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

2707

except IndexError as e:

1617

2708

raise ValueError(*(e.args))

1618

2709

timevalue += delta

1619

2710

return timevalue

1620

2711

1621

2712

1622

def if_nametoindex(interface):

1623

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

1624

1625

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

1626

global if_nametoindex

1627

try:

1628

if_nametoindex = (ctypes.cdll.LoadLibrary

1629

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

1630

.if_nametoindex)

1631

except (OSError, AttributeError):

1632

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

1633

def if_nametoindex(interface):

1634

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

1635

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

1636

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

1637

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1638

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

1639

interface))

1640

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

1641

ifreq[16:20])[0]

1642

return interface_index

1643

return if_nametoindex(interface)

1644

1645

1646

2713

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

1647

2714

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

1648

2715

1656

2723

sys.exit()

1657

2724

if not noclose:

1658

2725

# Close all standard open file descriptors

1659

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

2726

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

1660

2727

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

1661

2728

raise OSError(errno.ENODEV,

1662

"%s not a character device"

1663

% os.path.devnull)

2729

"{} not a character device"

2730

.format(os.devnull))

1664

2731

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

1665

2732

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

1666

2733

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

1675

2742

1676

2743

parser = argparse.ArgumentParser()

1677

2744

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

1678

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

2745

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

1679

2746

help="show version number and exit")

1680

2747

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

1681

2748

help="Bind to interface IF")

1687

2754

help="Run self-test")

1688

2755

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

1689

2756

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

1690

" to terminal")

2757

" to terminal", default=None)

1691

2758

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

1692

2759

help="Debug level for stdout output")

1693

2760

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

1700

2767

" files")

1701

2768

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

1702

2769

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

1703

" system bus interface")

2770

" system bus interface", default=None)

1704

2771

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

1705

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

1706

2788

options = parser.parse_args()

1707

2789

1708

2790

if options.check:

1709

2791

import doctest

1710

doctest.testmod()

1711

sys.exit()

2792

fail_count, test_count = doctest.testmod()

2793

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

1712

2794

1713

2795

# Default values for config file for server-global settings

1714

2796

server_defaults = { "interface": "",

1716

2798

"port": "",

1717

2799

"debug": "False",

1718

2800

"priority":

1719

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

2801

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

2802

":+SIGN-DSA-SHA256",

1720

2803

"servicename": "Mandos",

1721

2804

"use_dbus": "True",

1722

2805

"use_ipv6": "True",

1723

2806

"debuglevel": "",

1724

}

2807

"restore": "True",

2808

"socket": "",

2809

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

2810

"foreground": "False",

2811

"zeroconf": "True",

2812

}

1725

2813

1726

2814

# Parse config file for server-global settings

1727

2815

server_config = configparser.SafeConfigParser(server_defaults)

1728

2816

del server_defaults

1729

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

1730

"mandos.conf"))

2817

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

1731

2818

# Convert the SafeConfigParser object to a dict

1732

2819

server_settings = server_config.defaults()

1733

2820

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

1734

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

2821

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

1735

2822

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

1736

2823

option)

1737

2824

if server_settings["port"]:

1738

2825

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

1739

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"])

1740

2836

del server_config

1741

2837

1742

2838

# Override the settings from the config file with command line

1743

2839

# options, if set.

1744

2840

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

1745

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

1746

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

2841

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

2842

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

2843

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

1747

2844

value = getattr(options, option)

1748

2845

if value is not None:

1749

2846

server_settings[option] = value

1750

2847

del options

1751

2848

# Force all strings to be unicode

1752

2849

for option in server_settings.keys():

1753

if type(server_settings[option]) is str:

1754

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

1755

2860

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

1756

2861

1757

2862

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

1758

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

1759

2869

# For convenience

1760

2870

debug = server_settings["debug"]

1761

2871

debuglevel = server_settings["debuglevel"]

1762

2872

use_dbus = server_settings["use_dbus"]

1763

2873

use_ipv6 = server_settings["use_ipv6"]

1764

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

1765

2888

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

1766

syslogger.setFormatter(logging.Formatter

1767

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

1768

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

1769

% server_settings["servicename"]))

2889

syslogger.setFormatter(

2890

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

2891

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

2892

server_settings["servicename"])))

1770

2893

1771

2894

# Parse config file with clients

1772

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

1773

"interval": "5m",

1774

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

1775

"host": "",

1776

"approval_delay": "0s",

1777

"approval_duration": "1s",

1778

}

1779

client_config = configparser.SafeConfigParser(client_defaults)

2895

client_config = configparser.SafeConfigParser(Client

2896

.client_defaults)

1780

2897

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

1781

2898

"clients.conf"))

1782

2899

1783

2900

global mandos_dbus_service

1784

2901

mandos_dbus_service = None

1785

2902

1786

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

1787

server_settings["port"]),

1788

ClientHandler,

1789

interface=(server_settings["interface"]

1790

or None),

1791

use_ipv6=use_ipv6,

1792

gnutls_priority=

1793

server_settings["priority"],

1794

use_dbus=use_dbus)

1795

if not debug:

1796

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

1797

2919

try:

1798

pidfile = open(pidfilename, "w")

1799

except IOError:

1800

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)

1801

2924

1802

try:

1803

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

1804

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

1805

except KeyError:

2925

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

2926

("mandos", "mandos"),

2927

("nobody", "nogroup")):

1806

2928

try:

1807

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

1808

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

2929

uid = pwd.getpwnam(name).pw_uid

2930

gid = pwd.getpwnam(group).pw_gid

2931

break

1809

2932

except KeyError:

1810

try:

1811

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

1812

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

1813

except KeyError:

1814

uid = 65534

1815

gid = 65534

2933

continue

2934

else:

2935

uid = 65534

2936

gid = 65534

1816

2937

try:

1817

2938

os.setgid(gid)

1818

2939

os.setuid(uid)

1819

except OSError, error:

1820

if error[0] != errno.EPERM:

1821

raise error

2940

except OSError as error:

2941

if error.errno != errno.EPERM:

2942

raise

1822

2943

1823

if not debug and not debuglevel:

1824

syslogger.setLevel(logging.WARNING)

1825

console.setLevel(logging.WARNING)

1826

if debuglevel:

1827

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

1828

syslogger.setLevel(level)

1829

console.setLevel(level)

1830

1831

2944

if debug:

1832

2945

# Enable all possible GnuTLS debugging

1833

2946

1834

2947

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

1835

2948

# - GnuTLS manual

1836

gnutls.library.functions.gnutls_global_set_log_level(11)

2949

gnutls.global_set_log_level(11)

1837

2950

1838

@gnutls.library.types.gnutls_log_func

2951

@gnutls.log_func

1839

2952

def debug_gnutls(level, string):

1840

2953

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

1841

2954

1842

(gnutls.library.functions

1843

.gnutls_global_set_log_function(debug_gnutls))

2955

gnutls.global_set_log_function(debug_gnutls)

1844

2956

1845

2957

# Redirect stdin so all checkers get /dev/null

1846

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

2958

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

1847

2959

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

1848

2960

if null > 2:

1849

2961

os.close(null)

1850

else:

1851

# No console logging

1852

logger.removeHandler(console)

1853

2962

1854

2963

# Need to fork before connecting to D-Bus

1855

if not debug:

2964

if not foreground:

1856

2965

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

1857

2966

daemon()

1858

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

1859

2972

global main_loop

1860

2973

# From the Avahi example code

1861

DBusGMainLoop(set_as_default=True )

2974

DBusGMainLoop(set_as_default=True)

1862

2975

main_loop = gobject.MainLoop()

1863

2976

bus = dbus.SystemBus()

1864

2977

# End of Avahi example code

1865

2978

if use_dbus:

1866

2979

try:

1867

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

1868

bus, do_not_queue=True)

1869

except dbus.exceptions.NameExistsException, e:

1870

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)

1871

2988

use_dbus = False

1872

2989

server_settings["use_dbus"] = False

1873

2990

tcp_server.use_dbus = False

1874

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1875

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

1876

servicetype = "_mandos._tcp",

1877

protocol = protocol, bus = bus)

1878

if server_settings["interface"]:

1879

service.interface = (if_nametoindex

1880

(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"))

1881

3001

1882

3002

global multiprocessing_manager

1883

3003

multiprocessing_manager = multiprocessing.Manager()

1885

3005

client_class = Client

1886

3006

if use_dbus:

1887

3007

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

1888

def client_config_items(config, section):

1889

special_settings = {

1890

"approved_by_default":

1891

lambda: config.getboolean(section,

1892

"approved_by_default"),

1893

}

1894

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))

1895

3092

try:

1896

yield (name, special_settings[name]())

1897

except KeyError:

1898

yield (name, value)

1899

1900

tcp_server.clients.update(set(

1901

client_class(name = section,

1902

config= dict(client_config_items(

1903

client_config, section)))

1904

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

1905

3118

if not tcp_server.clients:

1906

3119

logger.warning("No clients defined")

1907

1908

if not debug:

1909

try:

1910

with pidfile:

1911

pid = os.getpid()

1912

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

1913

del pidfile

1914

except IOError:

1915

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

1916

pidfilename, pid)

1917

except NameError:

1918

# "pidfile" was never created

1919

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

1920

3131

del pidfilename

1921

1922

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

1923

3132

1924

3133

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

1925

3134

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

1926

3135

1927

3136

if use_dbus:

1928

class MandosDBusService(dbus.service.Object):

3137

3138

@alternate_dbus_interfaces(

3139

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

3140

class MandosDBusService(DBusObjectWithObjectManager):

1929

3141

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

3142

1930

3143

def __init__(self):

1931

3144

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

1932

_interface = "se.bsnet.fukt.Mandos"

3145

3146

_interface = "se.recompile.Mandos"

1933

3147

1934

3148

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

1935

3149

def ClientAdded(self, objpath):

1941

3155

"D-Bus signal"

1942

3156

pass

1943

3157

3158

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

3159

"true"})

1944

3160

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

1945

3161

def ClientRemoved(self, objpath, name):

1946

3162

"D-Bus signal"

1947

3163

pass

1948

3164

3165

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

3166

"true"})

1949

3167

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

1950

3168

def GetAllClients(self):

1951

3169

"D-Bus method"

1952

return dbus.Array(c.dbus_object_path

1953

for c in tcp_server.clients)

3170

return dbus.Array(c.dbus_object_path for c in

3171

tcp_server.clients.itervalues())

1954

3172

3173

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

3174

"true"})

1955

3175

@dbus.service.method(_interface,

1956

3176

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

1957

3177

def GetAllClientsWithProperties(self):

1958

3178

"D-Bus method"

1959

3179

return dbus.Dictionary(

1960

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

1961

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() },

1962

3183

signature="oa{sv}")

1963

3184

1964

3185

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

1965

3186

def RemoveClient(self, object_path):

1966

3187

"D-Bus method"

1967

for c in tcp_server.clients:

3188

for c in tcp_server.clients.itervalues():

1968

3189

if c.dbus_object_path == object_path:

1969

tcp_server.clients.remove(c)

3190

del tcp_server.clients[c.name]

1970

3191

c.remove_from_connection()

1971

# Don't signal anything except ClientRemoved

3192

# Don't signal the disabling

1972

3193

c.disable(quiet=True)

1973

# Emit D-Bus signal

1974

self.ClientRemoved(object_path, c.name)

3194

# Emit D-Bus signal for removal

3195

self.client_removed_signal(c)

1975

3196

return

1976

3197

raise KeyError(object_path)

1977

3198

1978

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)

1979

3236

1980

3237

mandos_dbus_service = MandosDBusService()

1981

3238

1982

3239

def cleanup():

1983

3240

"Cleanup function; run on exit"

1984

service.cleanup()

1985

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

1986

3302

while tcp_server.clients:

1987

client = tcp_server.clients.pop()

3303

name, client = tcp_server.clients.popitem()

1988

3304

if use_dbus:

1989

3305

client.remove_from_connection()

1990

client.disable_hook = None

1991

# Don't signal anything except ClientRemoved

3306

# Don't signal the disabling

1992

3307

client.disable(quiet=True)

3308

# Emit D-Bus signal for removal

1993

3309

if use_dbus:

1994

# Emit D-Bus signal

1995

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

1996

client.name)

3310

mandos_dbus_service.client_removed_signal(client)

3311

client_settings.clear()

1997

3312

1998

3313

atexit.register(cleanup)

1999

3314

2000

for client in tcp_server.clients:

3315

for client in tcp_server.clients.itervalues():

2001

3316

if use_dbus:

2002

# Emit D-Bus signal

2003

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2004

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()

2005

3322

2006

3323

tcp_server.enable()

2007

3324

tcp_server.server_activate()

2008

3325

2009

3326

# Find out what port we got

2010

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

3327

if zeroconf:

3328

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

2011

3329

if use_ipv6:

2012

3330

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

2013

" flowinfo %d, scope_id %d"

2014

% tcp_server.socket.getsockname())

3331

" flowinfo %d, scope_id %d",

3332

*tcp_server.socket.getsockname())

2015

3333

else: # IPv4

2016

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

2017

% tcp_server.socket.getsockname())

3334

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

3335

*tcp_server.socket.getsockname())

2018

3336

2019

3337

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

2020

3338

2021

3339

try:

2022

# From the Avahi example code

2023

try:

2024

service.activate()

2025

except dbus.exceptions.DBusException, error:

2026

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

2027

cleanup()

2028

sys.exit(1)

2029

# 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

2030

3349

2031

3350

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

2032

3351

lambda *args, **kwargs:

2035

3354

2036

3355

logger.debug("Starting main loop")

2037

3356

main_loop.run()

2038

except AvahiError, error:

2039

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

3357

except AvahiError as error:

3358

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

2040

3359

cleanup()

2041

3360

sys.exit(1)

2042

3361

except KeyboardInterrupt:

2047

3366

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

2048

3367

cleanup()

2049

3368

3369

2050

3370

if __name__ == '__main__':

2051

3371

main()