/mandos/trunk : revision 499

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

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#

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# Everything else is

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#

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

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

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# along with this program. If not, see

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

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#

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

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

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import SocketServer as socketserver

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import socket

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import argparse

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import datetime

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import errno

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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try:

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import gobject

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except ImportError:

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from gi.repository import GObject as gobject

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import gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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except ImportError:

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.3"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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

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return interface_index

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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version = "1.3.1"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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class AvahiError(Exception):

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

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self.value = value

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

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**kwargs)

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

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def __unicode__(self):

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return unicode(repr(self.value))

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self, remove=True):

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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158

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")

311

self.name = str(

312

self.server.GetAlternativeServiceName(self.name))

313

self.rename_count += 1

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

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

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self.name)

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if remove:

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self.remove()

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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if (error.get_dbus_name()

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

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

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return self.rename(remove=False)

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else:

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

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self.cleanup()

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os._exit(1)

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

174

self.cleanup()

175

os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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179

if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self.entry_group_state_changed))

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'StateChanged', self .entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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205

self.group.Commit()

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361

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def entry_group_state_changed(self, state, error):

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

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

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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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str(error))

373

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

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217

unicode(error))

218

raise AvahiGroupError("State changed: %s"

219

% unicode(error))

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def cleanup(self):

376

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

377

222

if self.group is not None:

378

223

try:

379

224

self.group.Free()

380

225

except (dbus.exceptions.UnknownMethodException,

381

dbus.exceptions.DBusException):

226

dbus.exceptions.DBusException) as e:

382

227

pass

383

228

self.group = None

384

229

self.remove()

385

386

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

387

231

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

388

232

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

389

bad_states = {

390

avahi.SERVER_INVALID: "Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

392

avahi.SERVER_COLLISION: "Zeroconf server name collision",

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avahi.SERVER_FAILURE: "Zeroconf server failure",

394

}

233

bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

235

avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

238

avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

395

240

if state in bad_states:

396

241

if bad_states[state] is not None:

397

242

if error is None:

400

245

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

401

246

self.cleanup()

402

247

elif state == avahi.SERVER_RUNNING:

403

try:

404

self.add()

405

except dbus.exceptions.DBusException as error:

406

if (error.get_dbus_name()

407

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

408

logger.info("Local Zeroconf service name"

409

" collision.")

410

return self.rename(remove=False)

411

else:

412

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

413

self.cleanup()

414

os._exit(1)

248

self.add()

415

249

else:

416

250

if error is None:

417

251

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

418

252

else:

419

253

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

420

421

254

def activate(self):

422

255

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

423

256

if self.server is None:

427

260

follow_name_owner_changes=True),

428

261

avahi.DBUS_INTERFACE_SERVER)

429

262

self.server.connect_to_signal("StateChanged",

430

self.server_state_changed)

263

self.server_state_changed)

431

264

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

432

265

433

266

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

708

267

class Client(object):

709

268

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

710

269

711

270

Attributes:

712

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

271

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

713

272

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

714

273

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

715

274

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

722

281

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

723

282

checker_initiator_tag: a gobject event source tag, or None

724

283

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

725

client_structure: Object describing what attributes a client has

726

and is used for storing the client at exit

727

284

current_checker_command: string; current running checker_command

285

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

728

286

disable_initiator_tag: a gobject event source tag, or None

729

287

enabled: bool()

730

288

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

733

291

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

734

292

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

735

293

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

736

last_checker_status: integer between 0 and 255 reflecting exit

737

status of last checker. -1 reflects crashed

738

checker, -2 means no checker completed yet.

739

last_checker_signal: The signal which killed the last checker, if

740

last_checker_status is -1

741

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

294

last_enabled: datetime.datetime(); (UTC)

742

295

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

743

296

D-Bus identifiers

744

297

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

745

298

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

746

299

until this client is disabled

747

extended_timeout: extra long timeout when secret has been sent

300

extended_timeout: extra long timeout when password has been sent

748

301

runtime_expansions: Allowed attributes for runtime expansion.

749

302

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

750

303

disabled, or None

751

server_settings: The server_settings dict from main()

752

304

"""

753

305

754

306

runtime_expansions = ("approval_delay", "approval_duration",

755

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

756

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

757

"last_approval_request", "last_checked_ok",

307

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

308

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

758

309

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

759

client_defaults = {

760

"timeout": "PT5M",

761

"extended_timeout": "PT15M",

762

"interval": "PT2M",

763

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

764

"host": "",

765

"approval_delay": "PT0S",

766

"approval_duration": "PT1S",

767

"approved_by_default": "True",

768

"enabled": "True",

769

}

770

310

771

311

@staticmethod

772

def config_parser(config):

773

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

774

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

775

with exceptions for any special settings as defined above.

776

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

777

value given the same arguments.

778

"""

779

settings = {}

780

for client_name in config.sections():

781

section = dict(config.items(client_name))

782

client = settings[client_name] = {}

783

784

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

785

# Reformat values from string types to Python types

786

client["approved_by_default"] = config.getboolean(

787

client_name, "approved_by_default")

788

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

789

"enabled")

790

791

# Uppercase and remove spaces from fingerprint for later

792

# comparison purposes with return value from the

793

# fingerprint() function

794

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

795

.replace(" ", ""))

796

if "secret" in section:

797

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

798

elif "secfile" in section:

799

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

800

(section["secfile"])),

801

"rb") as secfile:

802

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

803

else:

804

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

805

.format(section))

806

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

807

client["extended_timeout"] = string_to_delta(

808

section["extended_timeout"])

809

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

810

client["approval_delay"] = string_to_delta(

811

section["approval_delay"])

812

client["approval_duration"] = string_to_delta(

813

section["approval_duration"])

814

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

815

client["last_approval_request"] = None

816

client["last_checked_ok"] = None

817

client["last_checker_status"] = -2

818

819

return settings

820

821

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

312

def _timedelta_to_milliseconds(td):

313

"Convert a datetime.timedelta() to milliseconds"

314

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

315

+ (td.seconds * 1000)

316

+ (td.microseconds // 1000))

317

318

def timeout_milliseconds(self):

319

"Return the 'timeout' attribute in milliseconds"

320

return self._timedelta_to_milliseconds(self.timeout)

321

322

def extended_timeout_milliseconds(self):

323

"Return the 'extended_timeout' attribute in milliseconds"

324

return self._timedelta_to_milliseconds(self.extended_timeout)

325

326

def interval_milliseconds(self):

327

"Return the 'interval' attribute in milliseconds"

328

return self._timedelta_to_milliseconds(self.interval)

329

330

def approval_delay_milliseconds(self):

331

return self._timedelta_to_milliseconds(self.approval_delay)

332

333

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

334

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

335

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

336

attribute."""

822

337

self.name = name

823

if server_settings is None:

824

server_settings = {}

825

self.server_settings = server_settings

826

# adding all client settings

827

for setting, value in settings.items():

828

setattr(self, setting, value)

829

830

if self.enabled:

831

if not hasattr(self, "last_enabled"):

832

self.last_enabled = datetime.datetime.utcnow()

833

if not hasattr(self, "expires"):

834

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

835

+ self.timeout)

836

else:

837

self.last_enabled = None

838

self.expires = None

839

338

if config is None:

339

config = {}

840

340

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

341

# Uppercase and remove spaces from fingerprint for later

342

# comparison purposes with return value from the fingerprint()

343

# function

344

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

345

.replace(" ", ""))

841

346

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

842

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

843

datetime.datetime.utcnow())

844

845

# attributes specific for this server instance

347

if "secret" in config:

348

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

349

elif "secfile" in config:

350

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

351

(config["secfile"])),

352

"rb") as secfile:

353

self.secret = secfile.read()

354

else:

355

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

356

% self.name)

357

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

358

self.created = datetime.datetime.utcnow()

359

self.enabled = False

360

self.last_approval_request = None

361

self.last_enabled = None

362

self.last_checked_ok = None

363

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

364

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

365

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

366

self.disable_hook = disable_hook

846

367

self.checker = None

847

368

self.checker_initiator_tag = None

848

369

self.disable_initiator_tag = None

370

self.expires = None

849

371

self.checker_callback_tag = None

372

self.checker_command = config["checker"]

850

373

self.current_checker_command = None

851

self.approved = None

374

self.last_connect = None

375

self._approved = None

376

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

377

True)

852

378

self.approvals_pending = 0

853

self.changedstate = multiprocessing_manager.Condition(

854

multiprocessing_manager.Lock())

855

self.client_structure = [attr

856

for attr in self.__dict__.iterkeys()

857

if not attr.startswith("_")]

858

self.client_structure.append("client_structure")

859

860

for name, t in inspect.getmembers(

861

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

862

if not name.startswith("_"):

863

self.client_structure.append(name)

379

self.approval_delay = string_to_delta(

380

config["approval_delay"])

381

self.approval_duration = string_to_delta(

382

config["approval_duration"])

383

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

864

384

865

# Send notice to process children that client state has changed

866

385

def send_changedstate(self):

867

with self.changedstate:

868

self.changedstate.notify_all()

869

386

self.changedstate.acquire()

387

self.changedstate.notify_all()

388

self.changedstate.release()

389

870

390

def enable(self):

871

391

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

872

392

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

873

393

# Already enabled

874

394

return

395

self.send_changedstate()

396

self.last_enabled = datetime.datetime.utcnow()

397

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

398

# and every interval from then on.

399

self.checker_initiator_tag = (gobject.timeout_add

400

(self.interval_milliseconds(),

401

self.start_checker))

402

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

875

403

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

404

self.disable_initiator_tag = (gobject.timeout_add

405

(self.timeout_milliseconds(),

406

self.disable))

876

407

self.enabled = True

877

self.last_enabled = datetime.datetime.utcnow()

878

self.init_checker()

879

self.send_changedstate()

408

# Also start a new checker *right now*.

409

self.start_checker()

880

410

881

411

def disable(self, quiet=True):

882

412

"""Disable this client."""

883

413

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

884

414

return False

885

415

if not quiet:

416

self.send_changedstate()

417

if not quiet:

886

418

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

887

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

419

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

888

420

gobject.source_remove(self.disable_initiator_tag)

889

421

self.disable_initiator_tag = None

890

422

self.expires = None

891

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

423

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

892

424

gobject.source_remove(self.checker_initiator_tag)

893

425

self.checker_initiator_tag = None

894

426

self.stop_checker()

427

if self.disable_hook:

428

self.disable_hook(self)

895

429

self.enabled = False

896

if not quiet:

897

self.send_changedstate()

898

430

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

899

431

return False

900

432

901

433

def __del__(self):

434

self.disable_hook = None

902

435

self.disable()

903

436

904

def init_checker(self):

905

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

906

# and every interval from then on.

907

if self.checker_initiator_tag is not None:

908

gobject.source_remove(self.checker_initiator_tag)

909

self.checker_initiator_tag = gobject.timeout_add(

910

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

911

self.start_checker)

912

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

913

if self.disable_initiator_tag is not None:

914

gobject.source_remove(self.disable_initiator_tag)

915

self.disable_initiator_tag = gobject.timeout_add(

916

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

917

# Also start a new checker *right now*.

918

self.start_checker()

919

920

def checker_callback(self, source, condition, connection,

921

command):

437

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

922

438

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

923

439

self.checker_callback_tag = None

924

440

self.checker = None

925

# Read return code from connection (see call_pipe)

926

returncode = connection.recv()

927

connection.close()

928

929

if returncode >= 0:

930

self.last_checker_status = returncode

931

self.last_checker_signal = None

932

if self.last_checker_status == 0:

441

if os.WIFEXITED(condition):

442

exitstatus = os.WEXITSTATUS(condition)

443

if exitstatus == 0:

933

444

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

934

445

vars(self))

935

446

self.checked_ok()

936

447

else:

937

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

448

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

449

vars(self))

938

450

else:

939

self.last_checker_status = -1

940

self.last_checker_signal = -returncode

941

451

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

942

452

vars(self))

943

return False

944

945

def checked_ok(self):

946

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

947

self.last_checked_ok = datetime.datetime.utcnow()

948

self.last_checker_status = 0

949

self.last_checker_signal = None

950

self.bump_timeout()

951

952

def bump_timeout(self, timeout=None):

953

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

453

454

def checked_ok(self, timeout=None):

455

"""Bump up the timeout for this client.

456

457

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

458

alive and well.

459

"""

954

460

if timeout is None:

955

461

timeout = self.timeout

956

if self.disable_initiator_tag is not None:

957

gobject.source_remove(self.disable_initiator_tag)

958

self.disable_initiator_tag = None

959

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

960

self.disable_initiator_tag = gobject.timeout_add(

961

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

962

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

462

self.last_checked_ok = datetime.datetime.utcnow()

463

gobject.source_remove(self.disable_initiator_tag)

464

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

465

self.disable_initiator_tag = (gobject.timeout_add

466

(self._timedelta_to_milliseconds(timeout),

467

self.disable))

963

468

964

469

def need_approval(self):

965

470

self.last_approval_request = datetime.datetime.utcnow()

970

475

If a checker already exists, leave it running and do

971

476

nothing."""

972

477

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

973

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

974

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

975

# would inevitably timeout, since no checker would get a

976

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

478

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

479

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

480

# client would inevitably timeout, since no checker would get

481

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

977

482

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

978

483

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

979

484

# should be.

980

485

981

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

982

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

983

self.checker.join()

984

self.checker = None

486

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

487

try:

488

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

489

except (AttributeError, OSError) as error:

490

if (isinstance(error, OSError)

491

and error.errno != errno.ECHILD):

492

raise error

493

else:

494

if pid:

495

logger.warning("Checker was a zombie")

496

gobject.source_remove(self.checker_callback_tag)

497

self.checker_callback(pid, status,

498

self.current_checker_command)

985

499

# Start a new checker if needed

986

500

if self.checker is None:

987

# Escape attributes for the shell

988

escaped_attrs = {

989

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

990

for attr in self.runtime_expansions }

991

501

try:

992

command = self.checker_command % escaped_attrs

993

except TypeError as error:

994

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

995

self.checker_command,

996

exc_info=error)

997

return True # Try again later

502

# In case checker_command has exactly one % operator

503

command = self.checker_command % self.host

504

except TypeError:

505

# Escape attributes for the shell

506

escaped_attrs = dict(

507

(attr,

508

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

509

errors=

510

'replace')))

511

for attr in

512

self.runtime_expansions)

513

514

try:

515

command = self.checker_command % escaped_attrs

516

except TypeError as error:

517

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

518

' %s', self.checker_command, error)

519

return True # Try again later

998

520

self.current_checker_command = command

999

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

1000

self.name)

1001

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

1002

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

1003

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

1004

# always replaced by /dev/null.)

1005

# The exception is when not debugging but nevertheless

1006

# running in the foreground; use the previously

1007

# created wnull.

1008

popen_args = { "close_fds": True,

1009

"shell": True,

1010

"cwd": "/" }

1011

if (not self.server_settings["debug"]

1012

and self.server_settings["foreground"]):

1013

popen_args.update({"stdout": wnull,

1014

"stderr": wnull })

1015

pipe = multiprocessing.Pipe(duplex = False)

1016

self.checker = multiprocessing.Process(

1017

target = call_pipe,

1018

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

1019

kwargs = popen_args)

1020

self.checker.start()

1021

self.checker_callback_tag = gobject.io_add_watch(

1022

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

1023

self.checker_callback, pipe[0], command)

521

try:

522

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

523

command, self.name)

524

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

525

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

526

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

527

# always replaced by /dev/null.)

528

self.checker = subprocess.Popen(command,

529

close_fds=True,

530

shell=True, cwd="/")

531

self.checker_callback_tag = (gobject.child_watch_add

532

(self.checker.pid,

533

self.checker_callback,

534

data=command))

535

# The checker may have completed before the gobject

536

# watch was added. Check for this.

537

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

538

if pid:

539

gobject.source_remove(self.checker_callback_tag)

540

self.checker_callback(pid, status, command)

541

except OSError as error:

542

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

543

error)

1024

544

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

1025

545

return True

1026

546

1032

552

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

1033

553

return

1034

554

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

1035

self.checker.terminate()

555

try:

556

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

557

#time.sleep(0.5)

558

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

559

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

560

except OSError as error:

561

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

562

raise

1036

563

self.checker = None

1037

564

1038

1039

def dbus_service_property(dbus_interface,

1040

signature="v",

1041

access="readwrite",

1042

byte_arrays=False):

565

def dbus_service_property(dbus_interface, signature="v",

566

access="readwrite", byte_arrays=False):

1043

567

"""Decorators for marking methods of a DBusObjectWithProperties to

1044

568

become properties on the D-Bus.

1045

569

1054

578

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

1055

579

if byte_arrays and signature != "ay":

1056

580

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

1057

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

1058

581

" signature %r" % signature)

1059

582

def decorator(func):

1060

583

func._dbus_is_property = True

1061

584

func._dbus_interface = dbus_interface

1066

589

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

1067

590

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1068

591

return func

1069

1070

return decorator

1071

1072

1073

def dbus_interface_annotations(dbus_interface):

1074

"""Decorator for marking functions returning interface annotations

1075

1076

Usage:

1077

1078

@dbus_interface_annotations("org.example.Interface")

1079

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

1080

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

1081

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

1082

"false"}

1083

"""

1084

1085

def decorator(func):

1086

func._dbus_is_interface = True

1087

func._dbus_interface = dbus_interface

1088

func._dbus_name = dbus_interface

1089

return func

1090

1091

return decorator

1092

1093

1094

def dbus_annotations(annotations):

1095

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

1096

Usage:

1097

1098

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

1099

"org.freedesktop.DBus.Property."

1100

"EmitsChangedSignal": "false"})

1101

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

1102

access="r")

1103

def Property_dbus_property(self):

1104

return dbus.Boolean(False)

1105

1106

See also the DBusObjectWithAnnotations class.

1107

"""

1108

1109

def decorator(func):

1110

func._dbus_annotations = annotations

1111

return func

1112

1113

592

return decorator

1114

593

1115

594

1116

595

class DBusPropertyException(dbus.exceptions.DBusException):

1117

596

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

1118

597

"""

1119

pass

598

def __unicode__(self):

599

return unicode(str(self))

1120

600

1121

601

1122

602

class DBusPropertyAccessException(DBusPropertyException):

1131

611

pass

1132

612

1133

613

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):

614

class DBusObjectWithProperties(dbus.service.Object):

1224

615

"""A D-Bus object with properties.

1225

616

1226

617

Classes inheriting from this can use the dbus_service_property

1227

618

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

1228

619

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

1229

620

"""

1230

621

622

@staticmethod

623

def _is_dbus_property(obj):

624

return getattr(obj, "_dbus_is_property", False)

625

626

def _get_all_dbus_properties(self):

627

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

628

"""

629

return ((prop._dbus_name, prop)

630

for name, prop in

631

inspect.getmembers(self, self._is_dbus_property))

632

1231

633

def _get_dbus_property(self, interface_name, property_name):

1232

634

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

1233

635

property with the specified name and interface.

1234

636

"""

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

637

for name in (property_name,

638

property_name + "_dbus_property"):

639

prop = getattr(self, name, None)

640

if (prop is None

641

or not self._is_dbus_property(prop)

642

or prop._dbus_name != property_name

643

or (interface_name and prop._dbus_interface

644

and interface_name != prop._dbus_interface)):

645

continue

646

return prop

1242

647

# No such property

1243

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

1244

self.dbus_object_path, interface_name, property_name))

1245

1246

@classmethod

1247

def _get_all_interface_names(cls):

1248

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

1249

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

1250

"_dbus_interface", None)

1251

for x in (inspect.getmro(cls))

1252

for attr in dir(x))

1253

if name is not None)

1254

1255

@dbus.service.method(dbus.PROPERTIES_IFACE,

1256

in_signature="ss",

648

raise DBusPropertyNotFound(self.dbus_object_path + ":"

649

+ interface_name + "."

650

+ property_name)

651

652

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

1257

653

out_signature="v")

1258

654

def Get(self, interface_name, property_name):

1259

655

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

1277

673

# The byte_arrays option is not supported yet on

1278

674

# signatures other than "ay".

1279

675

if prop._dbus_signature != "ay":

1280

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

1281

"'ay' signature {!r}"

1282

.format(prop._dbus_signature))

1283

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

1284

for byte in value))

676

raise ValueError

677

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

678

for byte in value))

1285

679

prop(value)

1286

680

1287

@dbus.service.method(dbus.PROPERTIES_IFACE,

1288

in_signature="s",

681

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

1289

682

out_signature="a{sv}")

1290

683

def GetAll(self, interface_name):

1291

684

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

1292

685

standard.

1293

686

1294

687

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

1295

688

"""

1296

properties = {}

1297

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

689

all = {}

690

for name, prop in self._get_all_dbus_properties():

1298

691

if (interface_name

1299

692

and interface_name != prop._dbus_interface):

1300

693

# Interface non-empty but did not match

1304

697

continue

1305

698

value = prop()

1306

699

if not hasattr(value, "variant_level"):

1307

properties[name] = value

700

all[name] = value

1308

701

continue

1309

properties[name] = type(value)(

1310

value, variant_level = value.variant_level + 1)

1311

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

1312

1313

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

1314

def PropertiesChanged(self, interface_name, changed_properties,

1315

invalidated_properties):

1316

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

1317

standard.

1318

"""

1319

pass

702

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

703

value.variant_level+1)

704

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

1320

705

1321

706

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1322

707

out_signature="s",

1323

708

path_keyword='object_path',

1324

709

connection_keyword='connection')

1325

710

def Introspect(self, object_path, connection):

1326

"""Overloading of standard D-Bus method.

1327

1328

Inserts property tags and interface annotation tags.

711

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

1329

712

"""

1330

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1331

object_path,

1332

connection)

713

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

714

connection)

1333

715

try:

1334

716

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

1335

1336

717

def make_tag(document, name, prop):

1337

718

e = document.createElement("property")

1338

719

e.setAttribute("name", name)

1339

720

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

1340

721

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

1341

722

return e

1342

1343

723

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

1344

# Add property tags

1345

724

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

1346

725

for name, prop

1347

in self._get_all_dbus_things("property")

726

in self._get_all_dbus_properties()

1348

727

if prop._dbus_interface

1349

728

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

1350

729

if_tag.appendChild(tag)

1351

# Add annotation tags for properties

1352

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

1353

annots = dict()

1354

for name, prop in self._get_all_dbus_things(

1355

"property"):

1356

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

1357

and prop._dbus_interface

1358

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

1359

annots.update(getattr(

1360

prop, "_dbus_annotations", {}))

1361

for name, value in annots.items():

1362

ann_tag = document.createElement(

1363

"annotation")

1364

ann_tag.setAttribute("name", name)

1365

ann_tag.setAttribute("value", value)

1366

tag.appendChild(ann_tag)

1367

730

# Add the names to the return values for the

1368

731

# "org.freedesktop.DBus.Properties" methods

1369

732

if (if_tag.getAttribute("name")

1384

747

except (AttributeError, xml.dom.DOMException,

1385

748

xml.parsers.expat.ExpatError) as error:

1386

749

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"})

750

error)

751

return xmlstring

752

753

1654

754

class ClientDBus(Client, DBusObjectWithProperties):

1655

755

"""A Client class using D-Bus

1656

756

1660

760

"""

1661

761

1662

762

runtime_expansions = (Client.runtime_expansions

1663

+ ("dbus_object_path", ))

1664

1665

_interface = "se.recompile.Mandos.Client"

763

+ ("dbus_object_path",))

1666

764

1667

765

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

1668

766

1669

767

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

768

self._approvals_pending = 0

1670

769

self.bus = bus

1671

770

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

1672

771

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

1673

772

# the D-Bus

1674

client_object_name = str(self.name).translate(

773

client_object_name = unicode(self.name).translate(

1675

774

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

1676

775

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

1677

self.dbus_object_path = dbus.ObjectPath(

1678

"/clients/" + client_object_name)

776

self.dbus_object_path = (dbus.ObjectPath

777

("/clients/" + client_object_name))

1679

778

DBusObjectWithProperties.__init__(self, self.bus,

1680

779

self.dbus_object_path)

1681

1682

def notifychangeproperty(transform_func, dbus_name,

1683

type_func=lambda x: x,

1684

variant_level=1,

1685

invalidate_only=False,

1686

_interface=_interface):

1687

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

1688

its changes to DBus.

1689

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

780

def _set_expires(self, value):

781

old_value = getattr(self, "_expires", None)

782

self._expires = value

783

if hasattr(self, "dbus_object_path") and old_value != value:

784

dbus_time = (self._datetime_to_dbus(self._expires,

785

variant_level=1))

786

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

787

dbus_time)

788

expires = property(lambda self: self._expires, _set_expires)

789

del _set_expires

790

791

def _get_approvals_pending(self):

792

return self._approvals_pending

793

def _set_approvals_pending(self, value):

794

old_value = self._approvals_pending

795

self._approvals_pending = value

796

bval = bool(value)

797

if (hasattr(self, "dbus_object_path")

798

and bval is not bool(old_value)):

799

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

800

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

801

dbus_bool)

802

803

approvals_pending = property(_get_approvals_pending,

804

_set_approvals_pending)

805

del _get_approvals_pending, _set_approvals_pending

806

807

@staticmethod

808

def _datetime_to_dbus(dt, variant_level=0):

809

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

810

if dt is None:

811

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

812

return dbus.String(dt.isoformat(),

813

variant_level=variant_level)

814

815

def enable(self):

816

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

817

r = Client.enable(self)

818

if oldstate != self.enabled:

819

# Emit D-Bus signals

820

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

821

dbus.Boolean(True, variant_level=1))

822

self.PropertyChanged(

823

dbus.String("LastEnabled"),

824

self._datetime_to_dbus(self.last_enabled,

825

variant_level=1))

826

return r

827

828

def disable(self, quiet = False):

829

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

830

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

831

if not quiet and oldstate != self.enabled:

832

# Emit D-Bus signal

833

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

834

dbus.Boolean(False, variant_level=1))

835

return r

1762

836

1763

837

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

1764

838

try:

1769

843

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

1770

844

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

1771

845

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:

846

def checker_callback(self, pid, condition, command,

847

*args, **kwargs):

848

self.checker_callback_tag = None

849

self.checker = None

850

# Emit D-Bus signal

851

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

852

dbus.Boolean(False, variant_level=1))

853

if os.WIFEXITED(condition):

854

exitstatus = os.WEXITSTATUS(condition)

1779

855

# Emit D-Bus signal

1780

856

self.CheckerCompleted(dbus.Int16(exitstatus),

1781

# This is specific to GNU libC

1782

dbus.Int64(exitstatus << 8),

857

dbus.Int64(condition),

1783

858

dbus.String(command))

1784

859

else:

1785

860

# Emit D-Bus signal

1786

861

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

1787

dbus.Int64(

1788

# This is specific to GNU libC

1789

(exitstatus << 8)

1790

| self.last_checker_signal),

862

dbus.Int64(condition),

1791

863

dbus.String(command))

1792

return ret

864

865

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

866

*args, **kwargs)

867

868

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

869

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

870

# Emit D-Bus signal

871

self.PropertyChanged(

872

dbus.String("LastCheckedOK"),

873

(self._datetime_to_dbus(self.last_checked_ok,

874

variant_level=1)))

875

876

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

877

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

878

# Emit D-Bus signal

879

self.PropertyChanged(

880

dbus.String("LastApprovalRequest"),

881

(self._datetime_to_dbus(self.last_approval_request,

882

variant_level=1)))

883

return r

1793

884

1794

885

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

1795

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

886

old_checker = self.checker

887

if self.checker is not None:

888

old_checker_pid = self.checker.pid

889

else:

890

old_checker_pid = None

1796

891

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

1797

892

# Only if new checker process was started

1798

893

if (self.checker is not None

1799

894

and old_checker_pid != self.checker.pid):

1800

895

# Emit D-Bus signal

1801

896

self.CheckerStarted(self.current_checker_command)

897

self.PropertyChanged(

898

dbus.String("CheckerRunning"),

899

dbus.Boolean(True, variant_level=1))

1802

900

return r

1803

901

902

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

903

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

904

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

905

if (old_checker is not None

906

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

907

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

908

dbus.Boolean(False, variant_level=1))

909

return r

910

1804

911

def _reset_approved(self):

1805

self.approved = None

912

self._approved = None

1806

913

return False

1807

914

1808

915

def approve(self, value=True):

1809

self.approved = value

1810

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

1811

* 1000), self._reset_approved)

1812

916

self.send_changedstate()

917

self._approved = value

918

gobject.timeout_add(self._timedelta_to_milliseconds

919

(self.approval_duration),

920

self._reset_approved)

921

1813

922

1814

923

## D-Bus methods, signals & properties

1815

1816

## Interfaces

924

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

1817

925

1818

926

## Signals

1819

927

1830

938

pass

1831

939

1832

940

# PropertyChanged - signal

1833

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

1834

941

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

1835

942

def PropertyChanged(self, property, value):

1836

943

"D-Bus signal"

1870

977

self.checked_ok()

1871

978

1872

979

# Enable - method

1873

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

1874

980

@dbus.service.method(_interface)

1875

981

def Enable(self):

1876

982

"D-Bus method"

1877

983

self.enable()

1878

984

1879

985

# StartChecker - method

1880

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

1881

986

@dbus.service.method(_interface)

1882

987

def StartChecker(self):

1883

988

"D-Bus method"

1884

989

self.start_checker()

1885

990

1886

991

# Disable - method

1887

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

1888

992

@dbus.service.method(_interface)

1889

993

def Disable(self):

1890

994

"D-Bus method"

1891

995

self.disable()

1892

996

1893

997

# StopChecker - method

1894

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

1895

998

@dbus.service.method(_interface)

1896

999

def StopChecker(self):

1897

1000

self.stop_checker()

1904

1007

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

1905

1008

1906

1009

# ApprovedByDefault - property

1907

@dbus_service_property(_interface,

1908

signature="b",

1010

@dbus_service_property(_interface, signature="b",

1909

1011

access="readwrite")

1910

1012

def ApprovedByDefault_dbus_property(self, value=None):

1911

1013

if value is None: # get

1912

1014

return dbus.Boolean(self.approved_by_default)

1015

old_value = self.approved_by_default

1913

1016

self.approved_by_default = bool(value)

1017

# Emit D-Bus signal

1018

if old_value != self.approved_by_default:

1019

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

1020

dbus.Boolean(value, variant_level=1))

1914

1021

1915

1022

# ApprovalDelay - property

1916

@dbus_service_property(_interface,

1917

signature="t",

1023

@dbus_service_property(_interface, signature="t",

1918

1024

access="readwrite")

1919

1025

def ApprovalDelay_dbus_property(self, value=None):

1920

1026

if value is None: # get

1921

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

1922

* 1000)

1027

return dbus.UInt64(self.approval_delay_milliseconds())

1028

old_value = self.approval_delay

1923

1029

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

1030

# Emit D-Bus signal

1031

if old_value != self.approval_delay:

1032

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

1033

dbus.UInt64(value, variant_level=1))

1924

1034

1925

1035

# ApprovalDuration - property

1926

@dbus_service_property(_interface,

1927

signature="t",

1036

@dbus_service_property(_interface, signature="t",

1928

1037

access="readwrite")

1929

1038

def ApprovalDuration_dbus_property(self, value=None):

1930

1039

if value is None: # get

1931

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

1932

* 1000)

1040

return dbus.UInt64(self._timedelta_to_milliseconds(

1041

self.approval_duration))

1042

old_value = self.approval_duration

1933

1043

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

1044

# Emit D-Bus signal

1045

if old_value != self.approval_duration:

1046

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

1047

dbus.UInt64(value, variant_level=1))

1934

1048

1935

1049

# Name - property

1936

@dbus_annotations(

1937

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

1938

1050

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

1939

1051

def Name_dbus_property(self):

1940

1052

return dbus.String(self.name)

1941

1053

1942

1054

# Fingerprint - property

1943

@dbus_annotations(

1944

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

1945

1055

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

1946

1056

def Fingerprint_dbus_property(self):

1947

1057

return dbus.String(self.fingerprint)

1948

1058

1949

1059

# Host - property

1950

@dbus_service_property(_interface,

1951

signature="s",

1060

@dbus_service_property(_interface, signature="s",

1952

1061

access="readwrite")

1953

1062

def Host_dbus_property(self, value=None):

1954

1063

if value is None: # get

1955

1064

return dbus.String(self.host)

1956

self.host = str(value)

1065

old_value = self.host

1066

self.host = value

1067

# Emit D-Bus signal

1068

if old_value != self.host:

1069

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

1070

dbus.String(value, variant_level=1))

1957

1071

1958

1072

# Created - property

1959

@dbus_annotations(

1960

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

1961

1073

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

1962

1074

def Created_dbus_property(self):

1963

return datetime_to_dbus(self.created)

1075

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

1964

1076

1965

1077

# LastEnabled - property

1966

1078

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

1967

1079

def LastEnabled_dbus_property(self):

1968

return datetime_to_dbus(self.last_enabled)

1080

return self._datetime_to_dbus(self.last_enabled)

1969

1081

1970

1082

# Enabled - property

1971

@dbus_service_property(_interface,

1972

signature="b",

1083

@dbus_service_property(_interface, signature="b",

1973

1084

access="readwrite")

1974

1085

def Enabled_dbus_property(self, value=None):

1975

1086

if value is None: # get

1980

1091

self.disable()

1981

1092

1982

1093

# LastCheckedOK - property

1983

@dbus_service_property(_interface,

1984

signature="s",

1094

@dbus_service_property(_interface, signature="s",

1985

1095

access="readwrite")

1986

1096

def LastCheckedOK_dbus_property(self, value=None):

1987

1097

if value is not None:

1988

1098

self.checked_ok()

1989

1099

return

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)

1100

return self._datetime_to_dbus(self.last_checked_ok)

1996

1101

1997

1102

# Expires - property

1998

1103

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

1999

1104

def Expires_dbus_property(self):

2000

return datetime_to_dbus(self.expires)

1105

return self._datetime_to_dbus(self.expires)

2001

1106

2002

1107

# LastApprovalRequest - property

2003

1108

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

2004

1109

def LastApprovalRequest_dbus_property(self):

2005

return datetime_to_dbus(self.last_approval_request)

1110

return self._datetime_to_dbus(self.last_approval_request)

2006

1111

2007

1112

# Timeout - property

2008

@dbus_service_property(_interface,

2009

signature="t",

1113

@dbus_service_property(_interface, signature="t",

2010

1114

access="readwrite")

2011

1115

def Timeout_dbus_property(self, value=None):

2012

1116

if value is None: # get

2013

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

2014

old_timeout = self.timeout

1117

return dbus.UInt64(self.timeout_milliseconds())

1118

old_value = self.timeout

2015

1119

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

2016

# Reschedule disabling

2017

if self.enabled:

2018

now = datetime.datetime.utcnow()

2019

self.expires += self.timeout - old_timeout

2020

if self.expires <= now:

2021

# The timeout has passed

2022

self.disable()

2023

else:

2024

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

2025

is None):

2026

return

2027

gobject.source_remove(self.disable_initiator_tag)

2028

self.disable_initiator_tag = gobject.timeout_add(

2029

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

2030

self.disable)

2031

1120

# Emit D-Bus signal

1121

if old_value != self.timeout:

1122

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

1123

dbus.UInt64(value, variant_level=1))

1124

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

1125

return

1126

# Reschedule timeout

1127

gobject.source_remove(self.disable_initiator_tag)

1128

self.disable_initiator_tag = None

1129

self.expires = None

1130

time_to_die = (self.

1131

_timedelta_to_milliseconds((self

1132

.last_checked_ok

1133

+ self.timeout)

1134

- datetime.datetime

1135

.utcnow()))

1136

if time_to_die <= 0:

1137

# The timeout has passed

1138

self.disable()

1139

else:

1140

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

1141

+ datetime.timedelta(milliseconds = time_to_die))

1142

self.disable_initiator_tag = (gobject.timeout_add

1143

(time_to_die, self.disable))

1144

2032

1145

# ExtendedTimeout - property

2033

@dbus_service_property(_interface,

2034

signature="t",

1146

@dbus_service_property(_interface, signature="t",

2035

1147

access="readwrite")

2036

1148

def ExtendedTimeout_dbus_property(self, value=None):

2037

1149

if value is None: # get

2038

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

2039

* 1000)

1150

return dbus.UInt64(self.extended_timeout_milliseconds())

1151

old_value = self.extended_timeout

2040

1152

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

2041

1153

# Emit D-Bus signal

1154

if old_value != self.extended_timeout:

1155

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

1156

dbus.UInt64(value, variant_level=1))

1157

2042

1158

# Interval - property

2043

@dbus_service_property(_interface,

2044

signature="t",

1159

@dbus_service_property(_interface, signature="t",

2045

1160

access="readwrite")

2046

1161

def Interval_dbus_property(self, value=None):

2047

1162

if value is None: # get

2048

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

1163

return dbus.UInt64(self.interval_milliseconds())

1164

old_value = self.interval

2049

1165

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

1166

# Emit D-Bus signal

1167

if old_value != self.interval:

1168

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

1169

dbus.UInt64(value, variant_level=1))

2050

1170

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

2051

1171

return

2052

if self.enabled:

2053

# Reschedule checker run

2054

gobject.source_remove(self.checker_initiator_tag)

2055

self.checker_initiator_tag = gobject.timeout_add(

2056

value, self.start_checker)

2057

self.start_checker() # Start one now, too

2058

1172

# Reschedule checker run

1173

gobject.source_remove(self.checker_initiator_tag)

1174

self.checker_initiator_tag = (gobject.timeout_add

1175

(value, self.start_checker))

1176

self.start_checker() # Start one now, too

1177

2059

1178

# Checker - property

2060

@dbus_service_property(_interface,

2061

signature="s",

1179

@dbus_service_property(_interface, signature="s",

2062

1180

access="readwrite")

2063

1181

def Checker_dbus_property(self, value=None):

2064

1182

if value is None: # get

2065

1183

return dbus.String(self.checker_command)

2066

self.checker_command = str(value)

1184

old_value = self.checker_command

1185

self.checker_command = value

1186

# Emit D-Bus signal

1187

if old_value != self.checker_command:

1188

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

1189

dbus.String(self.checker_command,

1190

variant_level=1))

2067

1191

2068

1192

# CheckerRunning - property

2069

@dbus_service_property(_interface,

2070

signature="b",

1193

@dbus_service_property(_interface, signature="b",

2071

1194

access="readwrite")

2072

1195

def CheckerRunning_dbus_property(self, value=None):

2073

1196

if value is None: # get

2078

1201

self.stop_checker()

2079

1202

2080

1203

# ObjectPath - property

2081

@dbus_annotations(

2082

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

2083

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

2084

1204

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

2085

1205

def ObjectPath_dbus_property(self):

2086

1206

return self.dbus_object_path # is already a dbus.ObjectPath

2087

1207

2088

1208

# Secret = property

2089

@dbus_annotations(

2090

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

2091

"invalidates"})

2092

@dbus_service_property(_interface,

2093

signature="ay",

2094

access="write",

2095

byte_arrays=True)

1209

@dbus_service_property(_interface, signature="ay",

1210

access="write", byte_arrays=True)

2096

1211

def Secret_dbus_property(self, value):

2097

self.secret = bytes(value)

1212

self.secret = str(value)

2098

1213

2099

1214

del _interface

2100

1215

2104

1219

self._pipe = child_pipe

2105

1220

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

2106

1221

if not self._pipe.recv():

2107

raise KeyError(fpr)

2108

1222

raise KeyError()

1223

2109

1224

def __getattribute__(self, name):

2110

if name == '_pipe':

1225

if(name == '_pipe'):

2111

1226

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

2112

1227

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

2113

1228

data = self._pipe.recv()

2114

1229

if data[0] == 'data':

2115

1230

return data[1]

2116

1231

if data[0] == 'function':

2117

2118

1232

def func(*args, **kwargs):

2119

1233

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

2120

1234

return self._pipe.recv()[1]

2121

2122

1235

return func

2123

1236

2124

1237

def __setattr__(self, name, value):

2125

if name == '_pipe':

1238

if(name == '_pipe'):

2126

1239

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

2127

1240

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

2128

1241

2136

1249

def handle(self):

2137

1250

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

2138

1251

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

2139

str(self.client_address))

1252

unicode(self.client_address))

2140

1253

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

2141

1254

self.server.child_pipe.fileno())

2142

2143

session = gnutls.ClientSession(self.request)

2144

1255

1256

session = (gnutls.connection

1257

.ClientSession(self.request,

1258

gnutls.connection

1259

.X509Credentials()))

1260

1261

# Note: gnutls.connection.X509Credentials is really a

1262

# generic GnuTLS certificate credentials object so long as

1263

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

1264

# here despite using OpenPGP certificates.

1265

2145

1266

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

2146

1267

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

2147

1268

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

2150

1271

priority = self.server.gnutls_priority

2151

1272

if priority is None:

2152

1273

priority = "NORMAL"

2153

gnutls.priority_set_direct(session._c_object, priority,

2154

None)

2155

1274

(gnutls.library.functions

1275

.gnutls_priority_set_direct(session._c_object,

1276

priority, None))

1277

2156

1278

# Start communication using the Mandos protocol

2157

1279

# Get protocol number

2158

1280

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

2159

1281

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

2160

1282

try:

2161

1283

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

2162

raise RuntimeError(line)

1284

raise RuntimeError

2163

1285

except (ValueError, IndexError, RuntimeError) as error:

2164

1286

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

2165

1287

return

2166

1288

2167

1289

# Start GnuTLS connection

2168

1290

try:

2169

1291

session.handshake()

2170

except gnutls.Error as error:

1292

except gnutls.errors.GNUTLSError as error:

2171

1293

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

2172

1294

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

2173

1295

# established. Just abandon the request.

2174

1296

return

2175

1297

logger.debug("Handshake succeeded")

2176

1298

2177

1299

approval_required = False

2178

1300

try:

2179

1301

try:

2180

fpr = self.fingerprint(

2181

self.peer_certificate(session))

2182

except (TypeError, gnutls.Error) as error:

1302

fpr = self.fingerprint(self.peer_certificate

1303

(session))

1304

except (TypeError,

1305

gnutls.errors.GNUTLSError) as error:

2183

1306

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

2184

1307

return

2185

1308

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

2186

1309

2187

1310

try:

2188

1311

client = ProxyClient(child_pipe, fpr,

2189

1312

self.client_address)

2198

1321

while True:

2199

1322

if not client.enabled:

2200

1323

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

2201

client.name)

1324

client.name)

2202

1325

if self.server.use_dbus:

2203

1326

# Emit D-Bus signal

2204

client.Rejected("Disabled")

1327

client.Rejected("Disabled")

2205

1328

return

2206

1329

2207

if client.approved or not client.approval_delay:

1330

if client._approved or not client.approval_delay:

2208

1331

#We are approved or approval is disabled

2209

1332

break

2210

elif client.approved is None:

1333

elif client._approved is None:

2211

1334

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

2212

1335

client.name)

2213

1336

if self.server.use_dbus:

2214

1337

# Emit D-Bus signal

2215

1338

client.NeedApproval(

2216

client.approval_delay.total_seconds()

2217

* 1000, client.approved_by_default)

1339

client.approval_delay_milliseconds(),

1340

client.approved_by_default)

2218

1341

else:

2219

1342

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

2220

1343

client.name)

2224

1347

return

2225

1348

2226

1349

#wait until timeout or approved

1350

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

2227

1351

time = datetime.datetime.now()

2228

1352

client.changedstate.acquire()

2229

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

1353

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

2230

1354

client.changedstate.release()

2231

1355

time2 = datetime.datetime.now()

2232

1356

if (time2 - time) >= delay:

2243

1367

else:

2244

1368

delay -= time2 - time

2245

1369

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

1370

sent_size = 0

1371

while sent_size < len(client.secret):

1372

try:

1373

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

1374

except gnutls.errors.GNUTLSError as error:

1375

logger.warning("gnutls send failed")

1376

return

1377

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

1378

sent, len(client.secret)

1379

- (sent_size + sent))

1380

sent_size += sent

1381

2253

1382

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

2254

# bump the timeout using extended_timeout

2255

client.bump_timeout(client.extended_timeout)

1383

# bump the timeout as if seen

1384

client.checked_ok(client.extended_timeout)

2256

1385

if self.server.use_dbus:

2257

1386

# Emit D-Bus signal

2258

1387

client.GotSecret()

2262

1391

client.approvals_pending -= 1

2263

1392

try:

2264

1393

session.bye()

2265

except gnutls.Error as error:

2266

logger.warning("GnuTLS bye failed",

2267

exc_info=error)

1394

except gnutls.errors.GNUTLSError as error:

1395

logger.warning("GnuTLS bye failed")

2268

1396

2269

1397

@staticmethod

2270

1398

def peer_certificate(session):

2271

1399

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

2272

1400

# If not an OpenPGP certificate...

2273

if (gnutls.certificate_type_get(session._c_object)

2274

!= gnutls.CRT_OPENPGP):

2275

# ...return invalid data

2276

return b""

1401

if (gnutls.library.functions

1402

.gnutls_certificate_type_get(session._c_object)

1403

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1404

# ...do the normal thing

1405

return session.peer_certificate

2277

1406

list_size = ctypes.c_uint(1)

2278

cert_list = (gnutls.certificate_get_peers

1407

cert_list = (gnutls.library.functions

1408

.gnutls_certificate_get_peers

2279

1409

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

2280

1410

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

2281

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

1411

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

1412

" certificate")

2282

1413

if list_size.value == 0:

2283

1414

return None

2284

1415

cert = cert_list[0]

2288

1419

def fingerprint(openpgp):

2289

1420

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2290

1421

# New GnuTLS "datum" with the OpenPGP public key

2291

datum = gnutls.datum_t(

2292

ctypes.cast(ctypes.c_char_p(openpgp),

2293

ctypes.POINTER(ctypes.c_ubyte)),

2294

ctypes.c_uint(len(openpgp)))

1422

datum = (gnutls.library.types

1423

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

1424

ctypes.POINTER

1425

(ctypes.c_ubyte)),

1426

ctypes.c_uint(len(openpgp))))

2295

1427

# New empty GnuTLS certificate

2296

crt = gnutls.openpgp_crt_t()

2297

gnutls.openpgp_crt_init(ctypes.byref(crt))

1428

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1429

(gnutls.library.functions

1430

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2298

1431

# Import the OpenPGP public key into the certificate

2299

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

2300

gnutls.OPENPGP_FMT_RAW)

1432

(gnutls.library.functions

1433

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

1434

gnutls.library.constants

1435

.GNUTLS_OPENPGP_FMT_RAW))

2301

1436

# Verify the self signature in the key

2302

1437

crtverify = ctypes.c_uint()

2303

gnutls.openpgp_crt_verify_self(crt, 0,

2304

ctypes.byref(crtverify))

1438

(gnutls.library.functions

1439

.gnutls_openpgp_crt_verify_self(crt, 0,

1440

ctypes.byref(crtverify)))

2305

1441

if crtverify.value != 0:

2306

gnutls.openpgp_crt_deinit(crt)

2307

raise gnutls.CertificateSecurityError("Verify failed")

1442

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1443

raise (gnutls.errors.CertificateSecurityError

1444

("Verify failed"))

2308

1445

# New buffer for the fingerprint

2309

1446

buf = ctypes.create_string_buffer(20)

2310

1447

buf_len = ctypes.c_size_t()

2311

1448

# Get the fingerprint from the certificate into the buffer

2312

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

2313

ctypes.byref(buf_len))

1449

(gnutls.library.functions

1450

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

1451

ctypes.byref(buf_len)))

2314

1452

# Deinit the certificate

2315

gnutls.openpgp_crt_deinit(crt)

1453

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2316

1454

# Convert the buffer to a Python bytestring

2317

1455

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

2318

1456

# Convert the bytestring to hexadecimal notation

2319

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

1457

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

2320

1458

return hex_fpr

2321

1459

2322

1460

2323

1461

class MultiprocessingMixIn(object):

2324

1462

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

2325

2326

1463

def sub_process_main(self, request, address):

2327

1464

try:

2328

1465

self.finish_request(request, address)

2329

except Exception:

1466

except:

2330

1467

self.handle_error(request, address)

2331

1468

self.close_request(request)

2332

1469

2333

1470

def process_request(self, request, address):

2334

1471

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

2335

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

2336

args = (request, address))

2337

proc.start()

2338

return proc

2339

1472

multiprocessing.Process(target = self.sub_process_main,

1473

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

2340

1474

2341

1475

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2342

1476

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

2343

2344

1477

def process_request(self, request, client_address):

2345

1478

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

2346

1479

2347

1480

This function creates a new pipe in self.pipe

2348

1481

"""

2349

1482

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2350

2351

proc = MultiprocessingMixIn.process_request(self, request,

2352

client_address)

1483

1484

super(MultiprocessingMixInWithPipe,

1485

self).process_request(request, client_address)

2353

1486

self.child_pipe.close()

2354

self.add_pipe(parent_pipe, proc)

2355

2356

def add_pipe(self, parent_pipe, proc):

1487

self.add_pipe(parent_pipe)

1488

1489

def add_pipe(self, parent_pipe):

2357

1490

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

2358

raise NotImplementedError()

2359

1491

raise NotImplementedError

2360

1492

2361

1493

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2362

1494

socketserver.TCPServer, object):

2367

1499

interface: None or a network interface name (string)

2368

1500

use_ipv6: Boolean; to use IPv6 or not

2369

1501

"""

2370

2371

1502

def __init__(self, server_address, RequestHandlerClass,

2372

interface=None,

2373

use_ipv6=True,

2374

socketfd=None):

2375

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

2376

creating a new one with socket.socket().

2377

"""

1503

interface=None, use_ipv6=True):

2378

1504

self.interface = interface

2379

1505

if use_ipv6:

2380

1506

self.address_family = socket.AF_INET6

2381

if socketfd is not None:

2382

# Save the file descriptor

2383

self.socketfd = socketfd

2384

# Save the original socket.socket() function

2385

self.socket_socket = socket.socket

2386

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

2387

#

2388

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

2389

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

2390

# patching socket.socket.)

2391

#

2392

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

2393

@functools.wraps(socket.socket)

2394

def socket_wrapper(*args, **kwargs):

2395

# Restore original function so subsequent calls are

2396

# not affected.

2397

socket.socket = self.socket_socket

2398

del self.socket_socket

2399

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

2400

# saved file descriptor.

2401

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

2402

# Replace socket.socket() function with wrapper

2403

socket.socket = socket_wrapper

2404

# The socketserver.TCPServer.__init__ will call

2405

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

2406

# socket_wrapper(), if socketfd was set.

2407

1507

socketserver.TCPServer.__init__(self, server_address,

2408

1508

RequestHandlerClass)

2409

2410

1509

def server_bind(self):

2411

1510

"""This overrides the normal server_bind() function

2412

1511

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

2418

1517

self.interface)

2419

1518

else:

2420

1519

try:

2421

self.socket.setsockopt(

2422

socket.SOL_SOCKET, SO_BINDTODEVICE,

2423

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

1520

self.socket.setsockopt(socket.SOL_SOCKET,

1521

SO_BINDTODEVICE,

1522

str(self.interface

1523

+ '\0'))

2424

1524

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:

1525

if error[0] == errno.EPERM:

1526

logger.error("No permission to"

1527

" bind to interface %s",

1528

self.interface)

1529

elif error[0] == errno.ENOPROTOOPT:

2429

1530

logger.error("SO_BINDTODEVICE not available;"

2430

1531

" cannot bind to interface %s",

2431

1532

self.interface)

2432

elif error.errno == errno.ENODEV:

2433

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

2434

" cannot bind", self.interface)

2435

1533

else:

2436

1534

raise

2437

1535

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

2440

1538

if self.address_family == socket.AF_INET6:

2441

1539

any_address = "::" # in6addr_any

2442

1540

else:

2443

any_address = "0.0.0.0" # INADDR_ANY

1541

any_address = socket.INADDR_ANY

2444

1542

self.server_address = (any_address,

2445

1543

self.server_address[1])

2446

1544

elif not self.server_address[1]:

2447

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

1545

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

1546

0)

2448

1547

# if self.interface:

2449

1548

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

2450

1549

# 0, # port

2464

1563

2465

1564

Assumes a gobject.MainLoop event loop.

2466

1565

"""

2467

2468

1566

def __init__(self, server_address, RequestHandlerClass,

2469

interface=None,

2470

use_ipv6=True,

2471

clients=None,

2472

gnutls_priority=None,

2473

use_dbus=True,

2474

socketfd=None):

1567

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

1568

gnutls_priority=None, use_dbus=True):

2475

1569

self.enabled = False

2476

1570

self.clients = clients

2477

1571

if self.clients is None:

2478

self.clients = {}

1572

self.clients = set()

2479

1573

self.use_dbus = use_dbus

2480

1574

self.gnutls_priority = gnutls_priority

2481

1575

IPv6_TCPServer.__init__(self, server_address,

2482

1576

RequestHandlerClass,

2483

1577

interface = interface,

2484

use_ipv6 = use_ipv6,

2485

socketfd = socketfd)

2486

1578

use_ipv6 = use_ipv6)

2487

1579

def server_activate(self):

2488

1580

if self.enabled:

2489

1581

return socketserver.TCPServer.server_activate(self)

2490

2491

1582

def enable(self):

2492

1583

self.enabled = True

2493

2494

def add_pipe(self, parent_pipe, proc):

1584

def add_pipe(self, parent_pipe):

2495

1585

# Call "handle_ipc" for both data and EOF events

2496

gobject.io_add_watch(

2497

parent_pipe.fileno(),

2498

gobject.IO_IN | gobject.IO_HUP,

2499

functools.partial(self.handle_ipc,

2500

parent_pipe = parent_pipe,

2501

proc = proc))

2502

2503

def handle_ipc(self, source, condition,

2504

parent_pipe=None,

2505

proc = None,

1586

gobject.io_add_watch(parent_pipe.fileno(),

1587

gobject.IO_IN | gobject.IO_HUP,

1588

functools.partial(self.handle_ipc,

1589

parent_pipe = parent_pipe))

1590

1591

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

2506

1592

client_object=None):

2507

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

2508

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

2509

# Wait for other process to exit

2510

proc.join()

1593

condition_names = {

1594

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

1595

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

1596

# blocking).

1597

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

1598

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

1599

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

1600

# broken, usually for pipes and

1601

# sockets).

1602

}

1603

conditions_string = ' | '.join(name

1604

for cond, name in

1605

condition_names.iteritems()

1606

if cond & condition)

1607

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

1608

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

2511

1609

return False

2512

1610

2513

1611

# Read a request from the child

2518

1616

fpr = request[1]

2519

1617

address = request[2]

2520

1618

2521

for c in self.clients.itervalues():

1619

for c in self.clients:

2522

1620

if c.fingerprint == fpr:

2523

1621

client = c

2524

1622

break

2527

1625

"dress: %s", fpr, address)

2528

1626

if self.use_dbus:

2529

1627

# Emit D-Bus signal

2530

mandos_dbus_service.ClientNotFound(fpr,

2531

address[0])

1628

mandos_dbus_service.ClientNotFound(fpr, address[0])

2532

1629

parent_pipe.send(False)

2533

1630

return False

2534

1631

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))

1632

gobject.io_add_watch(parent_pipe.fileno(),

1633

gobject.IO_IN | gobject.IO_HUP,

1634

functools.partial(self.handle_ipc,

1635

parent_pipe = parent_pipe,

1636

client_object = client))

2542

1637

parent_pipe.send(True)

2543

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

2544

# same fileno

1638

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

2545

1639

return False

2546

1640

if command == 'funcall':

2547

1641

funcname = request[1]

2548

1642

args = request[2]

2549

1643

kwargs = request[3]

2550

1644

2551

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

2552

funcname)(*args,

2553

**kwargs)))

2554

1645

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

1646

2555

1647

if command == 'getattr':

2556

1648

attrname = request[1]

2557

if isinstance(client_object.__getattribute__(attrname),

2558

collections.Callable):

2559

parent_pipe.send(('function', ))

1649

if callable(client_object.__getattribute__(attrname)):

1650

parent_pipe.send(('function',))

2560

1651

else:

2561

parent_pipe.send((

2562

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

1652

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

2563

1653

2564

1654

if command == 'setattr':

2565

1655

attrname = request[1]

2566

1656

value = request[2]

2567

1657

setattr(client_object, attrname, value)

2568

1658

2569

1659

return True

2570

1660

2571

1661

2572

def rfc3339_duration_to_delta(duration):

2573

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

2574

2575

>>> rfc3339_duration_to_delta("P7D")

2576

datetime.timedelta(7)

2577

>>> rfc3339_duration_to_delta("PT60S")

2578

datetime.timedelta(0, 60)

2579

>>> rfc3339_duration_to_delta("PT60M")

2580

datetime.timedelta(0, 3600)

2581

>>> rfc3339_duration_to_delta("PT24H")

2582

datetime.timedelta(1)

2583

>>> rfc3339_duration_to_delta("P1W")

2584

datetime.timedelta(7)

2585

>>> rfc3339_duration_to_delta("PT5M30S")

2586

datetime.timedelta(0, 330)

2587

>>> rfc3339_duration_to_delta("P1DT3M20S")

2588

datetime.timedelta(1, 200)

2589

"""

2590

2591

# Parsing an RFC 3339 duration with regular expressions is not

2592

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

2593

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

2594

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

2595

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

2596

# avoid excessive use of external libraries.

2597

2598

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

2599

Token = collections.namedtuple("Token", (

2600

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

2601

# a "group" containing digits

2602

"value", # datetime.timedelta or None

2603

"followers")) # Tokens valid after this token

2604

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

2605

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

2606

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

2607

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

2608

datetime.timedelta(seconds=1),

2609

frozenset((token_end, )))

2610

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

2611

datetime.timedelta(minutes=1),

2612

frozenset((token_second, token_end)))

2613

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

2614

datetime.timedelta(hours=1),

2615

frozenset((token_minute, token_end)))

2616

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

2617

None,

2618

frozenset((token_hour, token_minute,

2619

token_second)))

2620

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

2621

datetime.timedelta(days=1),

2622

frozenset((token_time, token_end)))

2623

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

2624

datetime.timedelta(weeks=4),

2625

frozenset((token_day, token_end)))

2626

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

2627

datetime.timedelta(weeks=52),

2628

frozenset((token_month, token_end)))

2629

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

2630

datetime.timedelta(weeks=1),

2631

frozenset((token_end, )))

2632

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

2633

frozenset((token_year, token_month,

2634

token_day, token_time,

2635

token_week)))

2636

# Define starting values

2637

value = datetime.timedelta() # Value so far

2638

found_token = None

2639

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

2640

s = duration # String left to parse

2641

# Loop until end token is found

2642

while found_token is not token_end:

2643

# Search for any currently valid tokens

2644

for token in followers:

2645

match = token.regexp.match(s)

2646

if match is not None:

2647

# Token found

2648

if token.value is not None:

2649

# Value found, parse digits

2650

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

2651

# Add to value so far

2652

value += factor * token.value

2653

# Strip token from string

2654

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

2655

# Go to found token

2656

found_token = token

2657

# Set valid next tokens

2658

followers = found_token.followers

2659

break

2660

else:

2661

# No currently valid tokens were found

2662

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

2663

.format(duration))

2664

# End token found

2665

return value

2666

2667

2668

1662

def string_to_delta(interval):

2669

1663

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

2670

1664

2681

1675

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

2682

1676

datetime.timedelta(0, 330)

2683

1677

"""

2684

2685

try:

2686

return rfc3339_duration_to_delta(interval)

2687

except ValueError:

2688

pass

2689

2690

1678

timevalue = datetime.timedelta(0)

2691

1679

for s in interval.split():

2692

1680

try:

2693

suffix = s[-1]

1681

suffix = unicode(s[-1])

2694

1682

value = int(s[:-1])

2695

1683

if suffix == "d":

2696

1684

delta = datetime.timedelta(value)

2703

1691

elif suffix == "w":

2704

1692

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

2705

1693

else:

2706

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

2707

except IndexError as e:

1694

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

1695

except (ValueError, IndexError) as e:

2708

1696

raise ValueError(*(e.args))

2709

1697

timevalue += delta

2710

1698

return timevalue

2711

1699

2712

1700

1701

def if_nametoindex(interface):

1702

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

1703

1704

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

1705

global if_nametoindex

1706

try:

1707

if_nametoindex = (ctypes.cdll.LoadLibrary

1708

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

1709

.if_nametoindex)

1710

except (OSError, AttributeError):

1711

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

1712

def if_nametoindex(interface):

1713

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

1714

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

1715

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

1716

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1717

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

1718

interface))

1719

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

1720

ifreq[16:20])[0]

1721

return interface_index

1722

return if_nametoindex(interface)

1723

1724

2713

1725

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

2714

1726

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

2715

1727

2723

1735

sys.exit()

2724

1736

if not noclose:

2725

1737

# Close all standard open file descriptors

2726

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

1738

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

2727

1739

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

2728

1740

raise OSError(errno.ENODEV,

2729

"{} not a character device"

2730

.format(os.devnull))

1741

"%s not a character device"

1742

% os.path.devnull)

2731

1743

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

2732

1744

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

2733

1745

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

2742

1754

2743

1755

parser = argparse.ArgumentParser()

2744

1756

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

2745

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

1757

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

2746

1758

help="show version number and exit")

2747

1759

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

2748

1760

help="Bind to interface IF")

2754

1766

help="Run self-test")

2755

1767

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

2756

1768

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

2757

" to terminal", default=None)

1769

" to terminal")

2758

1770

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

2759

1771

help="Debug level for stdout output")

2760

1772

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

2767

1779

" files")

2768

1780

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

2769

1781

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

2770

" system bus interface", default=None)

1782

" system bus interface")

2771

1783

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

2772

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

2773

default=None)

2774

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

2775

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

2776

" state", default=None)

2777

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

2778

help="Specify a file descriptor to a network"

2779

" socket to use instead of creating one")

2780

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

2781

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

2782

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

2783

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

2784

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

2785

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

2786

default=None)

2787

1784

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

2788

1785

options = parser.parse_args()

2789

1786

2790

1787

if options.check:

2791

1788

import doctest

2792

fail_count, test_count = doctest.testmod()

2793

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

1789

doctest.testmod()

1790

sys.exit()

2794

1791

2795

1792

# Default values for config file for server-global settings

2796

1793

server_defaults = { "interface": "",

2798

1795

"port": "",

2799

1796

"debug": "False",

2800

1797

"priority":

2801

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

2802

":+SIGN-DSA-SHA256",

1798

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

2803

1799

"servicename": "Mandos",

2804

1800

"use_dbus": "True",

2805

1801

"use_ipv6": "True",

2806

1802

"debuglevel": "",

2807

"restore": "True",

2808

"socket": "",

2809

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

2810

"foreground": "False",

2811

"zeroconf": "True",

2812

}

1803

}

2813

1804

2814

1805

# Parse config file for server-global settings

2815

1806

server_config = configparser.SafeConfigParser(server_defaults)

2816

1807

del server_defaults

2817

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

1808

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

1809

"mandos.conf"))

2818

1810

# Convert the SafeConfigParser object to a dict

2819

1811

server_settings = server_config.defaults()

2820

1812

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

2821

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

1813

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

2822

1814

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

2823

1815

option)

2824

1816

if server_settings["port"]:

2825

1817

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

2826

1818

"port")

2827

if server_settings["socket"]:

2828

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

2829

"socket")

2830

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

2831

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

2832

# happen with a supplied network socket.

2833

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

2834

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

2835

["socket"])

2836

1819

del server_config

2837

1820

2838

1821

# Override the settings from the config file with command line

2839

1822

# options, if set.

2840

1823

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

2841

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

2842

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

2843

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

1824

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

1825

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

2844

1826

value = getattr(options, option)

2845

1827

if value is not None:

2846

1828

server_settings[option] = value

2847

1829

del options

2848

1830

# Force all strings to be unicode

2849

1831

for option in server_settings.keys():

2850

if isinstance(server_settings[option], bytes):

2851

server_settings[option] = (server_settings[option]

2852

.decode("utf-8"))

2853

# Force all boolean options to be boolean

2854

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

2855

"foreground", "zeroconf"):

2856

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

2857

# Debug implies foreground

2858

if server_settings["debug"]:

2859

server_settings["foreground"] = True

1832

if type(server_settings[option]) is str:

1833

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

2860

1834

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

2861

1835

2862

1836

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

2863

1837

2864

if (not server_settings["zeroconf"]

2865

and not (server_settings["port"]

2866

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

2867

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

2868

2869

1838

# For convenience

2870

1839

debug = server_settings["debug"]

2871

1840

debuglevel = server_settings["debuglevel"]

2872

1841

use_dbus = server_settings["use_dbus"]

2873

1842

use_ipv6 = server_settings["use_ipv6"]

2874

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

2875

stored_state_file)

2876

foreground = server_settings["foreground"]

2877

zeroconf = server_settings["zeroconf"]

2878

2879

if debug:

2880

initlogger(debug, logging.DEBUG)

2881

else:

2882

if not debuglevel:

2883

initlogger(debug)

2884

else:

2885

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

2886

initlogger(debug, level)

2887

1843

2888

1844

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

2889

syslogger.setFormatter(

2890

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

2891

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

2892

server_settings["servicename"])))

1845

syslogger.setFormatter(logging.Formatter

1846

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

1847

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

1848

% server_settings["servicename"]))

2893

1849

2894

1850

# Parse config file with clients

2895

client_config = configparser.SafeConfigParser(Client

2896

.client_defaults)

1851

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

1852

"extended_timeout": "15m",

1853

"interval": "2m",

1854

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

1855

"host": "",

1856

"approval_delay": "0s",

1857

"approval_duration": "1s",

1858

}

1859

client_config = configparser.SafeConfigParser(client_defaults)

2897

1860

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

2898

1861

"clients.conf"))

2899

1862

2900

1863

global mandos_dbus_service

2901

1864

mandos_dbus_service = None

2902

1865

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

1866

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

1867

server_settings["port"]),

1868

ClientHandler,

1869

interface=(server_settings["interface"]

1870

or None),

1871

use_ipv6=use_ipv6,

1872

gnutls_priority=

1873

server_settings["priority"],

1874

use_dbus=use_dbus)

1875

if not debug:

1876

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

2919

1877

try:

2920

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

2921

except IOError as e:

2922

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

2923

exc_info=e)

1878

pidfile = open(pidfilename, "w")

1879

except IOError:

1880

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

2924

1881

2925

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

2926

("mandos", "mandos"),

2927

("nobody", "nogroup")):

1882

try:

1883

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

1884

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

1885

except KeyError:

2928

1886

try:

2929

uid = pwd.getpwnam(name).pw_uid

2930

gid = pwd.getpwnam(group).pw_gid

2931

break

1887

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

1888

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

2932

1889

except KeyError:

2933

continue

2934

else:

2935

uid = 65534

2936

gid = 65534

1890

try:

1891

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

1892

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

1893

except KeyError:

1894

uid = 65534

1895

gid = 65534

2937

1896

try:

2938

1897

os.setgid(gid)

2939

1898

os.setuid(uid)

2940

1899

except OSError as error:

2941

if error.errno != errno.EPERM:

2942

raise

1900

if error[0] != errno.EPERM:

1901

raise error

2943

1902

1903

if not debug and not debuglevel:

1904

syslogger.setLevel(logging.WARNING)

1905

console.setLevel(logging.WARNING)

1906

if debuglevel:

1907

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

1908

syslogger.setLevel(level)

1909

console.setLevel(level)

1910

2944

1911

if debug:

2945

1912

# Enable all possible GnuTLS debugging

2946

1913

2947

1914

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

2948

1915

# - GnuTLS manual

2949

gnutls.global_set_log_level(11)

1916

gnutls.library.functions.gnutls_global_set_log_level(11)

2950

1917

2951

@gnutls.log_func

1918

@gnutls.library.types.gnutls_log_func

2952

1919

def debug_gnutls(level, string):

2953

1920

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

2954

1921

2955

gnutls.global_set_log_function(debug_gnutls)

1922

(gnutls.library.functions

1923

.gnutls_global_set_log_function(debug_gnutls))

2956

1924

2957

1925

# Redirect stdin so all checkers get /dev/null

2958

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

1926

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

2959

1927

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

2960

1928

if null > 2:

2961

1929

os.close(null)

1930

else:

1931

# No console logging

1932

logger.removeHandler(console)

2962

1933

2963

1934

# Need to fork before connecting to D-Bus

2964

if not foreground:

1935

if not debug:

2965

1936

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

2966

1937

daemon()

2967

1938

2968

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

2969

# need to inform gobject that threads will be used.

2970

gobject.threads_init()

2971

2972

1939

global main_loop

2973

1940

# From the Avahi example code

2974

DBusGMainLoop(set_as_default=True)

1941

DBusGMainLoop(set_as_default=True )

2975

1942

main_loop = gobject.MainLoop()

2976

1943

bus = dbus.SystemBus()

2977

1944

# End of Avahi example code

2978

1945

if use_dbus:

2979

1946

try:

2980

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

2981

bus,

2982

do_not_queue=True)

2983

old_bus_name = dbus.service.BusName(

2984

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

2985

do_not_queue=True)

2986

except dbus.exceptions.DBusException as e:

2987

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

1947

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

1948

bus, do_not_queue=True)

1949

except dbus.exceptions.NameExistsException as e:

1950

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

2988

1951

use_dbus = False

2989

1952

server_settings["use_dbus"] = False

2990

1953

tcp_server.use_dbus = False

2991

if zeroconf:

2992

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2993

service = AvahiServiceToSyslog(

2994

name = server_settings["servicename"],

2995

servicetype = "_mandos._tcp",

2996

protocol = protocol,

2997

bus = bus)

2998

if server_settings["interface"]:

2999

service.interface = if_nametoindex(

3000

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

1954

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1955

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

1956

servicetype = "_mandos._tcp",

1957

protocol = protocol, bus = bus)

1958

if server_settings["interface"]:

1959

service.interface = (if_nametoindex

1960

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

3001

1961

3002

1962

global multiprocessing_manager

3003

1963

multiprocessing_manager = multiprocessing.Manager()

3005

1965

client_class = Client

3006

1966

if use_dbus:

3007

1967

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

3008

3009

client_settings = Client.config_parser(client_config)

3010

old_client_settings = {}

3011

clients_data = {}

3012

3013

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

3014

global wnull

3015

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

3016

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

3017

# mode

3018

if debug or not foreground:

3019

wnull.close()

3020

3021

# Get client data and settings from last running state.

3022

if server_settings["restore"]:

3023

try:

3024

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

3025

clients_data, old_client_settings = pickle.load(

3026

stored_state)

3027

os.remove(stored_state_path)

3028

except IOError as e:

3029

if e.errno == errno.ENOENT:

3030

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

3031

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

3032

else:

3033

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

3034

exc_info=e)

3035

raise

3036

except EOFError as e:

3037

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

3038

"EOFError:",

3039

exc_info=e)

3040

3041

with PGPEngine() as pgp:

3042

for client_name, client in clients_data.items():

3043

# Skip removed clients

3044

if client_name not in client_settings:

3045

continue

3046

3047

# Decide which value to use after restoring saved state.

3048

# We have three different values: Old config file,

3049

# new config file, and saved state.

3050

# New config value takes precedence if it differs from old

3051

# config value, otherwise use saved state.

3052

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

3053

try:

3054

# For each value in new config, check if it

3055

# differs from the old config value (Except for

3056

# the "secret" attribute)

3057

if (name != "secret"

3058

and (value !=

3059

old_client_settings[client_name][name])):

3060

client[name] = value

3061

except KeyError:

3062

pass

3063

3064

# Clients who has passed its expire date can still be

3065

# enabled if its last checker was successful. A Client

3066

# whose checker succeeded before we stored its state is

3067

# assumed to have successfully run all checkers during

3068

# downtime.

3069

if client["enabled"]:

3070

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

3071

if not client["last_checked_ok"]:

3072

logger.warning(

3073

"disabling client {} - Client never "

3074

"performed a successful checker".format(

3075

client_name))

3076

client["enabled"] = False

3077

elif client["last_checker_status"] != 0:

3078

logger.warning(

3079

"disabling client {} - Client last"

3080

" checker failed with error code"

3081

" {}".format(

3082

client_name,

3083

client["last_checker_status"]))

3084

client["enabled"] = False

3085

else:

3086

client["expires"] = (

3087

datetime.datetime.utcnow()

3088

+ client["timeout"])

3089

logger.debug("Last checker succeeded,"

3090

" keeping {} enabled".format(

3091

client_name))

1968

def client_config_items(config, section):

1969

special_settings = {

1970

"approved_by_default":

1971

lambda: config.getboolean(section,

1972

"approved_by_default"),

1973

}

1974

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

3092

1975

try:

3093

client["secret"] = pgp.decrypt(

3094

client["encrypted_secret"],

3095

client_settings[client_name]["secret"])

3096

except PGPError:

3097

# If decryption fails, we use secret from new settings

3098

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

3099

client_name))

3100

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

3101

["secret"])

3102

3103

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

3104

for client_name in (set(old_client_settings)

3105

- set(client_settings)):

3106

del clients_data[client_name]

3107

for client_name in (set(client_settings)

3108

- set(old_client_settings)):

3109

clients_data[client_name] = client_settings[client_name]

3110

3111

# Create all client objects

3112

for client_name, client in clients_data.items():

3113

tcp_server.clients[client_name] = client_class(

3114

name = client_name,

3115

settings = client,

3116

server_settings = server_settings)

3117

1976

yield (name, special_settings[name]())

1977

except KeyError:

1978

yield (name, value)

1979

1980

tcp_server.clients.update(set(

1981

client_class(name = section,

1982

config= dict(client_config_items(

1983

client_config, section)))

1984

for section in client_config.sections()))

3118

1985

if not tcp_server.clients:

3119

1986

logger.warning("No clients defined")

3120

3121

if not foreground:

3122

if pidfile is not None:

3123

pid = os.getpid()

3124

try:

3125

with pidfile:

3126

print(pid, file=pidfile)

3127

except IOError:

3128

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

3129

pidfilename, pid)

3130

del pidfile

1987

1988

if not debug:

1989

try:

1990

with pidfile:

1991

pid = os.getpid()

1992

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

1993

del pidfile

1994

except IOError:

1995

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

1996

pidfilename, pid)

1997

except NameError:

1998

# "pidfile" was never created

1999

pass

3131

2000

del pidfilename

3132

2001

2002

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

2003

3133

2004

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

3134

2005

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

3135

2006

3136

2007

if use_dbus:

3137

3138

@alternate_dbus_interfaces(

3139

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

3140

class MandosDBusService(DBusObjectWithObjectManager):

2008

class MandosDBusService(dbus.service.Object):

3141

2009

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

3142

3143

2010

def __init__(self):

3144

2011

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

3145

3146

_interface = "se.recompile.Mandos"

2012

_interface = "se.bsnet.fukt.Mandos"

3147

2013

3148

2014

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

3149

2015

def ClientAdded(self, objpath):

3155

2021

"D-Bus signal"

3156

2022

pass

3157

2023

3158

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

3159

"true"})

3160

2024

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

3161

2025

def ClientRemoved(self, objpath, name):

3162

2026

"D-Bus signal"

3163

2027

pass

3164

2028

3165

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

3166

"true"})

3167

2029

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

3168

2030

def GetAllClients(self):

3169

2031

"D-Bus method"

3170

return dbus.Array(c.dbus_object_path for c in

3171

tcp_server.clients.itervalues())

2032

return dbus.Array(c.dbus_object_path

2033

for c in tcp_server.clients)

3172

2034

3173

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

3174

"true"})

3175

2035

@dbus.service.method(_interface,

3176

2036

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

3177

2037

def GetAllClientsWithProperties(self):

3178

2038

"D-Bus method"

3179

2039

return dbus.Dictionary(

3180

{ c.dbus_object_path: c.GetAll(

3181

"se.recompile.Mandos.Client")

3182

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

2040

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

2041

for c in tcp_server.clients),

3183

2042

signature="oa{sv}")

3184

2043

3185

2044

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

3186

2045

def RemoveClient(self, object_path):

3187

2046

"D-Bus method"

3188

for c in tcp_server.clients.itervalues():

2047

for c in tcp_server.clients:

3189

2048

if c.dbus_object_path == object_path:

3190

del tcp_server.clients[c.name]

2049

tcp_server.clients.remove(c)

3191

2050

c.remove_from_connection()

3192

# Don't signal the disabling

2051

# Don't signal anything except ClientRemoved

3193

2052

c.disable(quiet=True)

3194

# Emit D-Bus signal for removal

3195

self.client_removed_signal(c)

2053

# Emit D-Bus signal

2054

self.ClientRemoved(object_path, c.name)

3196

2055

return

3197

2056

raise KeyError(object_path)

3198

2057

3199

2058

del _interface

3200

3201

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3202

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

3203

def GetManagedObjects(self):

3204

"""D-Bus method"""

3205

return dbus.Dictionary(

3206

{ client.dbus_object_path:

3207

dbus.Dictionary(

3208

{ interface: client.GetAll(interface)

3209

for interface in

3210

client._get_all_interface_names()})

3211

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

3212

3213

def client_added_signal(self, client):

3214

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

3215

if use_dbus:

3216

# New standard signal

3217

self.InterfacesAdded(

3218

client.dbus_object_path,

3219

dbus.Dictionary(

3220

{ interface: client.GetAll(interface)

3221

for interface in

3222

client._get_all_interface_names()}))

3223

# Old signal

3224

self.ClientAdded(client.dbus_object_path)

3225

3226

def client_removed_signal(self, client):

3227

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

3228

if use_dbus:

3229

# New standard signal

3230

self.InterfacesRemoved(

3231

client.dbus_object_path,

3232

client._get_all_interface_names())

3233

# Old signal

3234

self.ClientRemoved(client.dbus_object_path,

3235

client.name)

3236

2059

3237

2060

mandos_dbus_service = MandosDBusService()

3238

2061

3239

2062

def cleanup():

3240

2063

"Cleanup function; run on exit"

3241

if zeroconf:

3242

service.cleanup()

3243

3244

multiprocessing.active_children()

3245

wnull.close()

3246

if not (tcp_server.clients or client_settings):

3247

return

3248

3249

# Store client before exiting. Secrets are encrypted with key

3250

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

3251

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

3252

clients = {}

3253

with PGPEngine() as pgp:

3254

for client in tcp_server.clients.itervalues():

3255

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

3256

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

3257

key)

3258

client_dict = {}

3259

3260

# A list of attributes that can not be pickled

3261

# + secret.

3262

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

3263

"checker", "server_settings" }

3264

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

3265

.Object):

3266

exclude.add(name)

3267

3268

client_dict["encrypted_secret"] = (client

3269

.encrypted_secret)

3270

for attr in client.client_structure:

3271

if attr not in exclude:

3272

client_dict[attr] = getattr(client, attr)

3273

3274

clients[client.name] = client_dict

3275

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

3276

3277

try:

3278

with tempfile.NamedTemporaryFile(

3279

mode='wb',

3280

suffix=".pickle",

3281

prefix='clients-',

3282

dir=os.path.dirname(stored_state_path),

3283

delete=False) as stored_state:

3284

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

3285

tempname = stored_state.name

3286

os.rename(tempname, stored_state_path)

3287

except (IOError, OSError) as e:

3288

if not debug:

3289

try:

3290

os.remove(tempname)

3291

except NameError:

3292

pass

3293

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

3294

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

3295

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

3296

else:

3297

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

3298

exc_info=e)

3299

raise

3300

3301

# Delete all clients, and settings from config

2064

service.cleanup()

2065

3302

2066

while tcp_server.clients:

3303

name, client = tcp_server.clients.popitem()

2067

client = tcp_server.clients.pop()

3304

2068

if use_dbus:

3305

2069

client.remove_from_connection()

3306

# Don't signal the disabling

2070

client.disable_hook = None

2071

# Don't signal anything except ClientRemoved

3307

2072

client.disable(quiet=True)

3308

# Emit D-Bus signal for removal

3309

2073

if use_dbus:

3310

mandos_dbus_service.client_removed_signal(client)

3311

client_settings.clear()

2074

# Emit D-Bus signal

2075

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2076

client.name)

3312

2077

3313

2078

atexit.register(cleanup)

3314

2079

3315

for client in tcp_server.clients.itervalues():

2080

for client in tcp_server.clients:

3316

2081

if use_dbus:

3317

# Emit D-Bus signal for adding

3318

mandos_dbus_service.client_added_signal(client)

3319

# Need to initiate checking of clients

3320

if client.enabled:

3321

client.init_checker()

2082

# Emit D-Bus signal

2083

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2084

client.enable()

3322

2085

3323

2086

tcp_server.enable()

3324

2087

tcp_server.server_activate()

3325

2088

3326

2089

# Find out what port we got

3327

if zeroconf:

3328

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

2090

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

3329

2091

if use_ipv6:

3330

2092

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

3331

" flowinfo %d, scope_id %d",

3332

*tcp_server.socket.getsockname())

2093

" flowinfo %d, scope_id %d"

2094

% tcp_server.socket.getsockname())

3333

2095

else: # IPv4

3334

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

3335

*tcp_server.socket.getsockname())

2096

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

2097

% tcp_server.socket.getsockname())

3336

2098

3337

2099

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

3338

2100

3339

2101

try:

3340

if zeroconf:

3341

# From the Avahi example code

3342

try:

3343

service.activate()

3344

except dbus.exceptions.DBusException as error:

3345

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

3346

cleanup()

3347

sys.exit(1)

3348

# End of Avahi example code

2102

# From the Avahi example code

2103

try:

2104

service.activate()

2105

except dbus.exceptions.DBusException as error:

2106

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

2107

cleanup()

2108

sys.exit(1)

2109

# End of Avahi example code

3349

2110

3350

2111

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

3351

2112

lambda *args, **kwargs:

3355

2116

logger.debug("Starting main loop")

3356

2117

main_loop.run()

3357

2118

except AvahiError as error:

3358

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

2119

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

3359

2120

cleanup()

3360

2121

sys.exit(1)

3361

2122

except KeyboardInterrupt:

3366

2127

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

3367

2128

cleanup()

3368

2129

3369

3370

2130

if __name__ == '__main__':

3371

2131

main()