/mandos/trunk : revision 518.2.3

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

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#

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# Everything else is

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#

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

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

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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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 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 dbus

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import dbus.service

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.6.5"

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version = "1.4.1"

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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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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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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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return interface_index

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

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def initlogger(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 =

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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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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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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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class CryptoError(Exception):

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pass

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class PGPEngine(object):

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class Crypto(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.gnupg = GnuPGInterface.GnuPG()

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

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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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self.gnupg.options.extra_args.extend(['--force-mdc',

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'--quiet'])

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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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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 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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return b"mandos" + binascii.hexlify(password)

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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(dir=self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen(['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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self.gnupg.passphrase = self.password_encode(password)

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with open(os.devnull) as devnull:

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try:

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proc = self.gnupg.run(['--symmetric'],

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create_fhs=['stdin', 'stdout'],

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attach_fhs={'stderr': devnull})

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with contextlib.closing(proc.handles['stdin']) as f:

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f.write(data)

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with contextlib.closing(proc.handles['stdout']) as f:

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise CryptoError(e)

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self.gnupg.passphrase = None

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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(dir = self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen(['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

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= data)

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if proc.returncode != 0:

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raise PGPError(err)

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self.gnupg.passphrase = self.password_encode(password)

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with open(os.devnull) as devnull:

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try:

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proc = self.gnupg.run(['--decrypt'],

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create_fhs=['stdin', 'stdout'],

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attach_fhs={'stderr': devnull})

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with contextlib.closing(proc.handles['stdin'] ) as f:

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f.write(data)

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with contextlib.closing(proc.handles['stdout']) as f:

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise CryptoError(e)

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self.gnupg.passphrase = None

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return decrypted_plaintext

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class AvahiError(Exception):

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

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self.value = value

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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, 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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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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unicode(error))

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raise AvahiGroupError("State changed: {0!s}"

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.format(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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def cleanup(self):

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

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if self.group is not None:

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pass

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self.group = None

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self.remove()

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

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

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

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

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else:

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

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def activate(self):

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

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if self.server is None:

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self.server_state_changed)

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

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class AvahiServiceToSyslog(AvahiService):

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def rename(self):

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

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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('Mandos ({0}) [%(process)d]:'

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

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.format(self.name)))

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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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return ret

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def timedelta_to_milliseconds(td):

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def _timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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class Client(object):

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

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Attributes:

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

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

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

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

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

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

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

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

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, -2 means no checker completed yet.

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checker, or None.

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

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

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D-Bus identifiers

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

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

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until this client is disabled

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extended_timeout: extra long timeout when secret has been sent

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extended_timeout: extra long timeout when password has been sent

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runtime_expansions: Allowed attributes for runtime expansion.

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

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disabled, or None

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server_settings: The server_settings dict from main()

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

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

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"last_approval_request", "last_checked_ok",

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

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

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

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client_defaults = { "timeout": "PT5M",

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"extended_timeout": "PT15M",

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"interval": "PT2M",

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

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"host": "",

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"approval_delay": "PT0S",

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"approval_duration": "PT1S",

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"approved_by_default": "True",

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"enabled": "True",

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}

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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.timeout)

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return _timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.extended_timeout)

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return _timedelta_to_milliseconds(self.extended_timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return timedelta_to_milliseconds(self.interval)

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return _timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

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

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

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with exceptions for any special settings as defined above.

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

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value given the same arguments.

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"""

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settings = {}

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for client_name in config.sections():

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section = dict(config.items(client_name))

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client = settings[client_name] = {}

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

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# Reformat values from string types to Python types

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client["approved_by_default"] = config.getboolean(

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client_name, "approved_by_default")

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

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"enabled")

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

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.replace(" ", ""))

508

if "secret" in section:

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

510

elif "secfile" in section:

511

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

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(section["secfile"])),

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"rb") as secfile:

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

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else:

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raise TypeError("No secret or secfile for section {0}"

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.format(section))

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

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client["extended_timeout"] = string_to_delta(

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section["extended_timeout"])

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

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client["approval_delay"] = string_to_delta(

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section["approval_delay"])

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client["approval_duration"] = string_to_delta(

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section["approval_duration"])

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

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client["last_approval_request"] = None

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client["last_checked_ok"] = None

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client["last_checker_status"] = -2

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return settings

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

448

return _timedelta_to_milliseconds(self.approval_delay)

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

451

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

452

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

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attribute."""

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self.name = name

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if server_settings is None:

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server_settings = {}

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self.server_settings = server_settings

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# adding all client settings

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for setting, value in settings.iteritems():

540

setattr(self, setting, value)

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if self.enabled:

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if not hasattr(self, "last_enabled"):

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self.last_enabled = datetime.datetime.utcnow()

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if not hasattr(self, "expires"):

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

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+ self.timeout)

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else:

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self.last_enabled = None

550

self.expires = None

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if config is None:

456

config = {}

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

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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the fingerprint()

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# function

461

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

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.replace(" ", ""))

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

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

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datetime.datetime.utcnow())

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# attributes specific for this server instance

464

if "secret" in config:

465

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

466

elif "secfile" in config:

467

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

468

(config["secfile"])),

469

"rb") as secfile:

470

self.secret = secfile.read()

471

else:

472

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

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% self.name)

474

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

475

self.created = datetime.datetime.utcnow()

476

self.enabled = config.get("enabled", True)

477

self.last_approval_request = None

478

if self.enabled:

479

self.last_enabled = datetime.datetime.utcnow()

480

else:

481

self.last_enabled = None

482

self.last_checked_ok = None

483

self.last_checker_status = None

484

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

485

self.extended_timeout = string_to_delta(config

486

["extended_timeout"])

487

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

561

488

self.checker = None

562

489

self.checker_initiator_tag = None

563

490

self.disable_initiator_tag = None

491

if self.enabled:

492

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

493

else:

494

self.expires = None

564

495

self.checker_callback_tag = None

496

self.checker_command = config["checker"]

565

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self.current_checker_command = None

566

self.approved = None

498

self._approved = None

499

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

500

True)

567

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self.approvals_pending = 0

502

self.approval_delay = string_to_delta(

503

config["approval_delay"])

504

self.approval_duration = string_to_delta(

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config["approval_duration"])

568

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self.changedstate = (multiprocessing_manager

569

507

.Condition(multiprocessing_manager

570

508

.Lock()))

590

528

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

591

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# Already enabled

592

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return

531

self.send_changedstate()

593

532

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

594

533

self.enabled = True

595

534

self.last_enabled = datetime.datetime.utcnow()

596

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self.init_checker()

597

self.send_changedstate()

598

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def disable(self, quiet=True):

600

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"""Disable this client."""

601

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

602

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return False

603

541

if not quiet:

542

self.send_changedstate()

543

if not quiet:

604

544

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

605

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

545

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

606

546

gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = None

608

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self.expires = None

609

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

549

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

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gobject.source_remove(self.checker_initiator_tag)

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self.checker_initiator_tag = None

612

552

self.stop_checker()

613

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self.enabled = False

614

if not quiet:

615

self.send_changedstate()

616

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

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return False

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def init_checker(self):

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561

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

624

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# and every interval from then on.

625

if self.checker_initiator_tag is not None:

626

gobject.source_remove(self.checker_initiator_tag)

627

563

self.checker_initiator_tag = (gobject.timeout_add

628

564

(self.interval_milliseconds(),

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self.start_checker))

630

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

631

if self.disable_initiator_tag is not None:

632

gobject.source_remove(self.disable_initiator_tag)

633

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self.disable_initiator_tag = (gobject.timeout_add

634

568

(self.timeout_milliseconds(),

635

569

self.disable))

641

575

self.checker_callback_tag = None

642

576

self.checker = None

643

577

if os.WIFEXITED(condition):

644

self.last_checker_status = os.WEXITSTATUS(condition)

578

self.last_checker_status = os.WEXITSTATUS(condition)

645

579

if self.last_checker_status == 0:

646

580

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

647

581

vars(self))

654

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

655

589

vars(self))

656

590

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def checked_ok(self):

658

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

659

self.last_checked_ok = datetime.datetime.utcnow()

660

self.last_checker_status = 0

661

self.bump_timeout()

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663

def bump_timeout(self, timeout=None):

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

591

def checked_ok(self, timeout=None):

592

"""Bump up the timeout for this client.

593

594

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

595

alive and well.

596

"""

665

597

if timeout is None:

666

598

timeout = self.timeout

599

self.last_checked_ok = datetime.datetime.utcnow()

667

600

if self.disable_initiator_tag is not None:

668

601

gobject.source_remove(self.disable_initiator_tag)

669

self.disable_initiator_tag = None

670

602

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

671

603

self.disable_initiator_tag = (gobject.timeout_add

672

(timedelta_to_milliseconds

604

(_timedelta_to_milliseconds

673

605

(timeout), self.disable))

674

606

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

675

607

682

614

If a checker already exists, leave it running and do

683

615

nothing."""

684

616

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

685

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

686

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

687

# would inevitably timeout, since no checker would get a

688

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

617

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

618

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

619

# client would inevitably timeout, since no checker would get

620

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

689

621

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

690

622

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

691

623

# should be.

693

625

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

694

626

try:

695

627

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

696

except AttributeError:

697

pass

698

except OSError as error:

699

if error.errno != errno.ECHILD:

700

raise

628

except (AttributeError, OSError) as error:

629

if (isinstance(error, OSError)

630

and error.errno != errno.ECHILD):

631

raise error

701

632

else:

702

633

if pid:

703

634

logger.warning("Checker was a zombie")

706

637

self.current_checker_command)

707

638

# Start a new checker if needed

708

639

if self.checker is None:

709

# Escape attributes for the shell

710

escaped_attrs = dict(

711

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

712

for attr in

713

self.runtime_expansions)

714

640

try:

715

command = self.checker_command % escaped_attrs

716

except TypeError as error:

717

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

718

self.checker_command, exc_info=error)

719

return True # Try again later

641

# In case checker_command has exactly one % operator

642

command = self.checker_command % self.host

643

except TypeError:

644

# Escape attributes for the shell

645

escaped_attrs = dict(

646

(attr,

647

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

648

errors=

649

'replace')))

650

for attr in

651

self.runtime_expansions)

652

653

try:

654

command = self.checker_command % escaped_attrs

655

except TypeError as error:

656

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

657

' %s', self.checker_command, error)

658

return True # Try again later

720

659

self.current_checker_command = command

721

660

try:

722

661

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

725

664

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

726

665

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

727

666

# always replaced by /dev/null.)

728

# The exception is when not debugging but nevertheless

729

# running in the foreground; use the previously

730

# created wnull.

731

popen_args = {}

732

if (not self.server_settings["debug"]

733

and self.server_settings["foreground"]):

734

popen_args.update({"stdout": wnull,

735

"stderr": wnull })

736

667

self.checker = subprocess.Popen(command,

737

668

close_fds=True,

738

shell=True, cwd="/",

739

**popen_args)

740

except OSError as error:

741

logger.error("Failed to start subprocess",

742

exc_info=error)

743

return True

744

self.checker_callback_tag = (gobject.child_watch_add

745

(self.checker.pid,

746

self.checker_callback,

747

data=command))

748

# The checker may have completed before the gobject

749

# watch was added. Check for this.

750

try:

669

shell=True, cwd="/")

670

self.checker_callback_tag = (gobject.child_watch_add

671

(self.checker.pid,

672

self.checker_callback,

673

data=command))

674

# The checker may have completed before the gobject

675

# watch was added. Check for this.

751

676

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

677

if pid:

678

gobject.source_remove(self.checker_callback_tag)

679

self.checker_callback(pid, status, command)

752

680

except OSError as error:

753

if error.errno == errno.ECHILD:

754

# This should never happen

755

logger.error("Child process vanished",

756

exc_info=error)

757

return True

758

raise

759

if pid:

760

gobject.source_remove(self.checker_callback_tag)

761

self.checker_callback(pid, status, command)

681

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

682

error)

762

683

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

763

684

return True

764

685

771

692

return

772

693

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

773

694

try:

774

self.checker.terminate()

695

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

775

696

#time.sleep(0.5)

776

697

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

777

# self.checker.kill()

698

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

778

699

except OSError as error:

779

700

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

780

701

raise

797

718

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

798

719

if byte_arrays and signature != "ay":

799

720

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

800

" signature {0!r}".format(signature))

721

" signature %r" % signature)

801

722

def decorator(func):

802

723

func._dbus_is_property = True

803

724

func._dbus_interface = dbus_interface

811

732

return decorator

812

733

813

734

814

def dbus_interface_annotations(dbus_interface):

815

"""Decorator for marking functions returning interface annotations

816

817

Usage:

818

819

@dbus_interface_annotations("org.example.Interface")

820

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

821

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

822

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

823

"false"}

824

"""

825

def decorator(func):

826

func._dbus_is_interface = True

827

func._dbus_interface = dbus_interface

828

func._dbus_name = dbus_interface

829

return func

830

return decorator

831

832

833

def dbus_annotations(annotations):

834

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

835

Usage:

836

837

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

838

access="r")

839

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

840

"org.freedesktop.DBus.Property."

841

"EmitsChangedSignal": "false"})

842

def Property_dbus_property(self):

843

return dbus.Boolean(False)

844

"""

845

def decorator(func):

846

func._dbus_annotations = annotations

847

return func

848

return decorator

849

850

851

735

class DBusPropertyException(dbus.exceptions.DBusException):

852

736

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

853

737

"""

876

760

"""

877

761

878

762

@staticmethod

879

def _is_dbus_thing(thing):

880

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

881

882

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

883

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

884

"""

885

return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),

886

False)

763

def _is_dbus_property(obj):

764

return getattr(obj, "_dbus_is_property", False)

887

765

888

def _get_all_dbus_things(self, thing):

766

def _get_all_dbus_properties(self):

889

767

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

890

768

"""

891

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

892

name),

893

athing.__get__(self))

769

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

894

770

for cls in self.__class__.__mro__

895

for name, athing in

896

inspect.getmembers(cls,

897

self._is_dbus_thing(thing)))

771

for name, prop in

772

inspect.getmembers(cls, self._is_dbus_property))

898

773

899

774

def _get_dbus_property(self, interface_name, property_name):

900

775

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

902

777

"""

903

778

for cls in self.__class__.__mro__:

904

779

for name, value in (inspect.getmembers

905

(cls,

906

self._is_dbus_thing("property"))):

780

(cls, self._is_dbus_property)):

907

781

if (value._dbus_name == property_name

908

782

and value._dbus_interface == interface_name):

909

783

return value.__get__(self)

937

811

# The byte_arrays option is not supported yet on

938

812

# signatures other than "ay".

939

813

if prop._dbus_signature != "ay":

940

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

941

"'ay' signature {0!r}"

942

.format(prop._dbus_signature))

943

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

944

for byte in value))

814

raise ValueError

815

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

816

for byte in value))

945

817

prop(value)

946

818

947

819

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

953

825

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

954

826

"""

955

827

properties = {}

956

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

828

for name, prop in self._get_all_dbus_properties():

957

829

if (interface_name

958

830

and interface_name != prop._dbus_interface):

959

831

# Interface non-empty but did not match

974

846

path_keyword='object_path',

975

847

connection_keyword='connection')

976

848

def Introspect(self, object_path, connection):

977

"""Overloading of standard D-Bus method.

978

979

Inserts property tags and interface annotation tags.

849

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

980

850

"""

981

851

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

982

852

connection)

989

859

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

990

860

return e

991

861

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

992

# Add property tags

993

862

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

994

863

for name, prop

995

in self._get_all_dbus_things("property")

864

in self._get_all_dbus_properties()

996

865

if prop._dbus_interface

997

866

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

998

867

if_tag.appendChild(tag)

999

# Add annotation tags

1000

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

1001

for tag in if_tag.getElementsByTagName(typ):

1002

annots = dict()

1003

for name, prop in (self.

1004

_get_all_dbus_things(typ)):

1005

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

1006

and prop._dbus_interface

1007

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

1008

annots.update(getattr

1009

(prop,

1010

"_dbus_annotations",

1011

{}))

1012

for name, value in annots.iteritems():

1013

ann_tag = document.createElement(

1014

"annotation")

1015

ann_tag.setAttribute("name", name)

1016

ann_tag.setAttribute("value", value)

1017

tag.appendChild(ann_tag)

1018

# Add interface annotation tags

1019

for annotation, value in dict(

1020

itertools.chain.from_iterable(

1021

annotations().iteritems()

1022

for name, annotations in

1023

self._get_all_dbus_things("interface")

1024

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

1025

)).iteritems():

1026

ann_tag = document.createElement("annotation")

1027

ann_tag.setAttribute("name", annotation)

1028

ann_tag.setAttribute("value", value)

1029

if_tag.appendChild(ann_tag)

1030

868

# Add the names to the return values for the

1031

869

# "org.freedesktop.DBus.Properties" methods

1032

870

if (if_tag.getAttribute("name")

1047

885

except (AttributeError, xml.dom.DOMException,

1048

886

xml.parsers.expat.ExpatError) as error:

1049

887

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

1050

exc_info=error)

888

error)

1051

889

return xmlstring

1052

890

1053

891

1054

def datetime_to_dbus(dt, variant_level=0):

892

def datetime_to_dbus (dt, variant_level=0):

1055

893

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

1056

894

if dt is None:

1057

895

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

1059

897

variant_level=variant_level)

1060

898

1061

899

1062

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1063

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

1064

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

1065

interface names according to the "alt_interface_names" mapping.

1066

Usage:

1067

1068

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

1069

"net.example.AlternateInterface"})

1070

class SampleDBusObject(dbus.service.Object):

1071

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

1072

def SampleDBusMethod():

1073

pass

1074

1075

The above "SampleDBusMethod" on "SampleDBusObject" will be

1076

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

1077

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

1078

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

1079

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

1080

1081

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

1082

(from DBusObjectWithProperties) and interfaces (from the

1083

dbus_interface_annotations decorator).

900

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

901

.__metaclass__):

902

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

903

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

1084

904

"""

1085

def wrapper(cls):

1086

for orig_interface_name, alt_interface_name in (

1087

alt_interface_names.iteritems()):

1088

attr = {}

1089

interface_names = set()

1090

# Go though all attributes of the class

1091

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

905

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

906

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

907

# methods, signals, or properties in them

908

for base in (b for b in bases

909

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

910

# Go though all attributes of the base class

911

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

1092

912

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

1093

913

# with the wrong interface name

1094

914

if (not hasattr(attribute, "_dbus_interface")

1095

915

or not attribute._dbus_interface

1096

.startswith(orig_interface_name)):

916

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

1097

917

continue

1098

918

# Create an alternate D-Bus interface name based on

1099

919

# the current name

1100

920

alt_interface = (attribute._dbus_interface

1101

.replace(orig_interface_name,

1102

alt_interface_name))

1103

interface_names.add(alt_interface)

921

.replace("se.recompile.Mandos",

922

"se.bsnet.fukt.Mandos"))

1104

923

# Is this a D-Bus signal?

1105

924

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

1106

# Extract the original non-method undecorated

1107

# function by black magic

925

# Extract the original non-method function by

926

# black magic

1108

927

nonmethod_func = (dict(

1109

928

zip(attribute.func_code.co_freevars,

1110

929

attribute.__closure__))["func"]

1121

940

nonmethod_func.func_name,

1122

941

nonmethod_func.func_defaults,

1123

942

nonmethod_func.func_closure)))

1124

# Copy annotations, if any

1125

try:

1126

new_function._dbus_annotations = (

1127

dict(attribute._dbus_annotations))

1128

except AttributeError:

1129

pass

1130

943

# Define a creator of a function to call both the

1131

# original and alternate functions, so both the

1132

# original and alternate signals gets sent when

1133

# the function is called

944

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

945

# signals gets sent when the function is called

1134

946

def fixscope(func1, func2):

1135

947

"""This function is a scope container to pass

1136

948

func1 and func2 to the "call_both" function

1143

955

return call_both

1144

956

# Create the "call_both" function and add it to

1145

957

# the class

1146

attr[attrname] = fixscope(attribute, new_function)

958

attr[attrname] = fixscope(attribute,

959

new_function)

1147

960

# Is this a D-Bus method?

1148

961

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

1149

962

# Create a new, but exactly alike, function

1160

973

attribute.func_name,

1161

974

attribute.func_defaults,

1162

975

attribute.func_closure)))

1163

# Copy annotations, if any

1164

try:

1165

attr[attrname]._dbus_annotations = (

1166

dict(attribute._dbus_annotations))

1167

except AttributeError:

1168

pass

1169

976

# Is this a D-Bus property?

1170

977

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

1171

978

# Create a new, but exactly alike, function

1185

992

attribute.func_name,

1186

993

attribute.func_defaults,

1187

994

attribute.func_closure)))

1188

# Copy annotations, if any

1189

try:

1190

attr[attrname]._dbus_annotations = (

1191

dict(attribute._dbus_annotations))

1192

except AttributeError:

1193

pass

1194

# Is this a D-Bus interface?

1195

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

1196

# Create a new, but exactly alike, function

1197

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

1198

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

1199

# to the class.

1200

attr[attrname] = (dbus_interface_annotations

1201

(alt_interface)

1202

(types.FunctionType

1203

(attribute.func_code,

1204

attribute.func_globals,

1205

attribute.func_name,

1206

attribute.func_defaults,

1207

attribute.func_closure)))

1208

if deprecate:

1209

# Deprecate all alternate interfaces

1210

iname="_AlternateDBusNames_interface_annotation{0}"

1211

for interface_name in interface_names:

1212

@dbus_interface_annotations(interface_name)

1213

def func(self):

1214

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

1215

"true" }

1216

# Find an unused name

1217

for aname in (iname.format(i)

1218

for i in itertools.count()):

1219

if aname not in attr:

1220

attr[aname] = func

1221

break

1222

if interface_names:

1223

# Replace the class with a new subclass of it with

1224

# methods, signals, etc. as created above.

1225

cls = type(b"{0}Alternate".format(cls.__name__),

1226

(cls,), attr)

1227

return cls

1228

return wrapper

1229

1230

1231

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

1232

"se.bsnet.fukt.Mandos"})

995

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

996

997

1233

998

class ClientDBus(Client, DBusObjectWithProperties):

1234

999

"""A Client class using D-Bus

1235

1000

1246

1011

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

1247

1012

self.bus = bus

1248

1013

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

1014

1015

self._approvals_pending = 0

1249

1016

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

1250

1017

# the D-Bus

1251

1018

client_object_name = unicode(self.name).translate(

1255

1022

("/clients/" + client_object_name))

1256

1023

DBusObjectWithProperties.__init__(self, self.bus,

1257

1024

self.dbus_object_path)

1258

1025

1259

1026

def notifychangeproperty(transform_func,

1260

1027

dbus_name, type_func=lambda x: x,

1261

1028

variant_level=1):

1284

1051

1285

1052

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

1286

1053

1054

1287

1055

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1288

1056

approvals_pending = notifychangeproperty(dbus.Boolean,

1289

1057

"ApprovalPending",

1296

1064

checker is not None)

1297

1065

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1298

1066

"LastCheckedOK")

1299

last_checker_status = notifychangeproperty(dbus.Int16,

1300

"LastCheckerStatus")

1301

1067

last_approval_request = notifychangeproperty(

1302

1068

datetime_to_dbus, "LastApprovalRequest")

1303

1069

approved_by_default = notifychangeproperty(dbus.Boolean,

1304

1070

"ApprovedByDefault")

1305

approval_delay = notifychangeproperty(dbus.UInt64,

1071

approval_delay = notifychangeproperty(dbus.UInt16,

1306

1072

"ApprovalDelay",

1307

1073

type_func =

1308

timedelta_to_milliseconds)

1074

_timedelta_to_milliseconds)

1309

1075

approval_duration = notifychangeproperty(

1310

dbus.UInt64, "ApprovalDuration",

1311

type_func = timedelta_to_milliseconds)

1076

dbus.UInt16, "ApprovalDuration",

1077

type_func = _timedelta_to_milliseconds)

1312

1078

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

1313

timeout = notifychangeproperty(dbus.UInt64, "Timeout",

1079

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

1314

1080

type_func =

1315

timedelta_to_milliseconds)

1081

_timedelta_to_milliseconds)

1316

1082

extended_timeout = notifychangeproperty(

1317

dbus.UInt64, "ExtendedTimeout",

1318

type_func = timedelta_to_milliseconds)

1319

interval = notifychangeproperty(dbus.UInt64,

1083

dbus.UInt16, "ExtendedTimeout",

1084

type_func = _timedelta_to_milliseconds)

1085

interval = notifychangeproperty(dbus.UInt16,

1320

1086

"Interval",

1321

1087

type_func =

1322

timedelta_to_milliseconds)

1088

_timedelta_to_milliseconds)

1323

1089

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

1324

1090

1325

1091

del notifychangeproperty

1353

1119

*args, **kwargs)

1354

1120

1355

1121

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

1356

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

1122

old_checker = self.checker

1123

if self.checker is not None:

1124

old_checker_pid = self.checker.pid

1125

else:

1126

old_checker_pid = None

1357

1127

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

1358

1128

# Only if new checker process was started

1359

1129

if (self.checker is not None

1363

1133

return r

1364

1134

1365

1135

def _reset_approved(self):

1366

self.approved = None

1136

self._approved = None

1367

1137

return False

1368

1138

1369

1139

def approve(self, value=True):

1370

self.approved = value

1371

gobject.timeout_add(timedelta_to_milliseconds

1140

self.send_changedstate()

1141

self._approved = value

1142

gobject.timeout_add(_timedelta_to_milliseconds

1372

1143

(self.approval_duration),

1373

1144

self._reset_approved)

1374

self.send_changedstate()

1145

1375

1146

1376

1147

## D-Bus methods, signals & properties

1377

1148

_interface = "se.recompile.Mandos.Client"

1378

1149

1379

## Interfaces

1380

1381

@dbus_interface_annotations(_interface)

1382

def _foo(self):

1383

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

1384

"false"}

1385

1386

1150

## Signals

1387

1151

1388

1152

# CheckerCompleted - signal

1424

1188

"D-Bus signal"

1425

1189

return self.need_approval()

1426

1190

1191

# NeRwequest - signal

1192

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

1193

def NewRequest(self, ip):

1194

"""D-Bus signal

1195

Is sent after a client request a password.

1196

"""

1197

pass

1198

1427

1199

## Methods

1428

1200

1429

1201

# Approve - method

1487

1259

access="readwrite")

1488

1260

def ApprovalDuration_dbus_property(self, value=None):

1489

1261

if value is None: # get

1490

return dbus.UInt64(timedelta_to_milliseconds(

1262

return dbus.UInt64(_timedelta_to_milliseconds(

1491

1263

self.approval_duration))

1492

1264

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

1493

1265

1507

1279

def Host_dbus_property(self, value=None):

1508

1280

if value is None: # get

1509

1281

return dbus.String(self.host)

1510

self.host = unicode(value)

1282

self.host = value

1511

1283

1512

1284

# Created - property

1513

1285

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

1539

1311

return

1540

1312

return datetime_to_dbus(self.last_checked_ok)

1541

1313

1542

# LastCheckerStatus - property

1543

@dbus_service_property(_interface, signature="n",

1544

access="read")

1545

def LastCheckerStatus_dbus_property(self):

1546

return dbus.Int16(self.last_checker_status)

1547

1548

1314

# Expires - property

1549

1315

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

1550

1316

def Expires_dbus_property(self):

1561

1327

def Timeout_dbus_property(self, value=None):

1562

1328

if value is None: # get

1563

1329

return dbus.UInt64(self.timeout_milliseconds())

1564

old_timeout = self.timeout

1565

1330

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

1566

# Reschedule disabling

1567

if self.enabled:

1568

now = datetime.datetime.utcnow()

1569

self.expires += self.timeout - old_timeout

1570

if self.expires <= now:

1571

# The timeout has passed

1572

self.disable()

1573

else:

1574

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

1575

is None):

1576

return

1577

gobject.source_remove(self.disable_initiator_tag)

1578

self.disable_initiator_tag = (

1579

gobject.timeout_add(

1580

timedelta_to_milliseconds(self.expires - now),

1581

self.disable))

1331

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

1332

return

1333

# Reschedule timeout

1334

gobject.source_remove(self.disable_initiator_tag)

1335

self.disable_initiator_tag = None

1336

self.expires = None

1337

time_to_die = _timedelta_to_milliseconds((self

1338

.last_checked_ok

1339

+ self.timeout)

1340

- datetime.datetime

1341

.utcnow())

1342

if time_to_die <= 0:

1343

# The timeout has passed

1344

self.disable()

1345

else:

1346

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

1347

+ datetime.timedelta(milliseconds =

1348

time_to_die))

1349

self.disable_initiator_tag = (gobject.timeout_add

1350

(time_to_die, self.disable))

1582

1351

1583

1352

# ExtendedTimeout - property

1584

1353

@dbus_service_property(_interface, signature="t",

1610

1379

def Checker_dbus_property(self, value=None):

1611

1380

if value is None: # get

1612

1381

return dbus.String(self.checker_command)

1613

self.checker_command = unicode(value)

1382

self.checker_command = value

1614

1383

1615

1384

# CheckerRunning - property

1616

1385

@dbus_service_property(_interface, signature="b",

1645

1414

raise KeyError()

1646

1415

1647

1416

def __getattribute__(self, name):

1648

if name == '_pipe':

1417

if(name == '_pipe'):

1649

1418

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

1650

1419

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

1651

1420

data = self._pipe.recv()

1658

1427

return func

1659

1428

1660

1429

def __setattr__(self, name, value):

1661

if name == '_pipe':

1430

if(name == '_pipe'):

1662

1431

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

1663

1432

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

1664

1433

1665

1434

1435

class ClientDBusTransitional(ClientDBus):

1436

__metaclass__ = AlternateDBusNamesMetaclass

1437

1438

1666

1439

class ClientHandler(socketserver.BaseRequestHandler, object):

1667

1440

"""A class to handle client connections.

1668

1441

1704

1477

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

1705

1478

try:

1706

1479

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

1707

raise RuntimeError(line)

1480

raise RuntimeError

1708

1481

except (ValueError, IndexError, RuntimeError) as error:

1709

1482

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

1710

1483

return

1729

1502

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

1730

1503

return

1731

1504

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

1505

if self.server.use_dbus:

1506

# Emit D-Bus signal

1507

client.NewRequest(str(self.client_address))

1732

1508

1733

1509

try:

1734

1510

client = ProxyClient(child_pipe, fpr,

1750

1526

client.Rejected("Disabled")

1751

1527

return

1752

1528

1753

if client.approved or not client.approval_delay:

1529

if client._approved or not client.approval_delay:

1754

1530

#We are approved or approval is disabled

1755

1531

break

1756

elif client.approved is None:

1532

elif client._approved is None:

1757

1533

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

1758

1534

client.name)

1759

1535

if self.server.use_dbus:

1772

1548

#wait until timeout or approved

1773

1549

time = datetime.datetime.now()

1774

1550

client.changedstate.acquire()

1775

client.changedstate.wait(

1776

float(timedelta_to_milliseconds(delay)

1777

/ 1000))

1551

(client.changedstate.wait

1552

(float(client._timedelta_to_milliseconds(delay)

1553

/ 1000)))

1778

1554

client.changedstate.release()

1779

1555

time2 = datetime.datetime.now()

1780

1556

if (time2 - time) >= delay:

1796

1572

try:

1797

1573

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

1798

1574

except gnutls.errors.GNUTLSError as error:

1799

logger.warning("gnutls send failed",

1800

exc_info=error)

1575

logger.warning("gnutls send failed")

1801

1576

return

1802

1577

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

1803

1578

sent, len(client.secret)

1806

1581

1807

1582

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

1808

1583

# bump the timeout using extended_timeout

1809

client.bump_timeout(client.extended_timeout)

1584

client.checked_ok(client.extended_timeout)

1810

1585

if self.server.use_dbus:

1811

1586

# Emit D-Bus signal

1812

1587

client.GotSecret()

1817

1592

try:

1818

1593

session.bye()

1819

1594

except gnutls.errors.GNUTLSError as error:

1820

logger.warning("GnuTLS bye failed",

1821

exc_info=error)

1595

logger.warning("GnuTLS bye failed")

1822

1596

1823

1597

@staticmethod

1824

1598

def peer_certificate(session):

1889

1663

def sub_process_main(self, request, address):

1890

1664

try:

1891

1665

self.finish_request(request, address)

1892

except Exception:

1666

except:

1893

1667

self.handle_error(request, address)

1894

1668

self.close_request(request)

1895

1669

1896

1670

def process_request(self, request, address):

1897

1671

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

1898

1672

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

1899

args = (request, address))

1673

args = (request,

1674

address))

1900

1675

proc.start()

1901

1676

return proc

1902

1677

1917

1692

1918

1693

def add_pipe(self, parent_pipe, proc):

1919

1694

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

1920

raise NotImplementedError()

1695

raise NotImplementedError

1921

1696

1922

1697

1923

1698

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1930

1705

use_ipv6: Boolean; to use IPv6 or not

1931

1706

"""

1932

1707

def __init__(self, server_address, RequestHandlerClass,

1933

interface=None, use_ipv6=True, socketfd=None):

1934

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

1935

creating a new one with socket.socket().

1936

"""

1708

interface=None, use_ipv6=True):

1937

1709

self.interface = interface

1938

1710

if use_ipv6:

1939

1711

self.address_family = socket.AF_INET6

1940

if socketfd is not None:

1941

# Save the file descriptor

1942

self.socketfd = socketfd

1943

# Save the original socket.socket() function

1944

self.socket_socket = socket.socket

1945

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

1946

#

1947

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

1948

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

1949

# patching socket.socket.)

1950

#

1951

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

1952

@functools.wraps(socket.socket)

1953

def socket_wrapper(*args, **kwargs):

1954

# Restore original function so subsequent calls are

1955

# not affected.

1956

socket.socket = self.socket_socket

1957

del self.socket_socket

1958

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

1959

# saved file descriptor.

1960

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

1961

# Replace socket.socket() function with wrapper

1962

socket.socket = socket_wrapper

1963

# The socketserver.TCPServer.__init__ will call

1964

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

1965

# socket_wrapper(), if socketfd was set.

1966

1712

socketserver.TCPServer.__init__(self, server_address,

1967

1713

RequestHandlerClass)

1968

1969

1714

def server_bind(self):

1970

1715

"""This overrides the normal server_bind() function

1971

1716

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

1979

1724

try:

1980

1725

self.socket.setsockopt(socket.SOL_SOCKET,

1981

1726

SO_BINDTODEVICE,

1982

str(self.interface + '\0'))

1727

str(self.interface

1728

+ '\0'))

1983

1729

except socket.error as error:

1984

if error.errno == errno.EPERM:

1985

logger.error("No permission to bind to"

1986

" interface %s", self.interface)

1987

elif error.errno == errno.ENOPROTOOPT:

1730

if error[0] == errno.EPERM:

1731

logger.error("No permission to"

1732

" bind to interface %s",

1733

self.interface)

1734

elif error[0] == errno.ENOPROTOOPT:

1988

1735

logger.error("SO_BINDTODEVICE not available;"

1989

1736

" cannot bind to interface %s",

1990

1737

self.interface)

1991

elif error.errno == errno.ENODEV:

1992

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

1993

" cannot bind", self.interface)

1994

1738

else:

1995

1739

raise

1996

1740

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

1999

1743

if self.address_family == socket.AF_INET6:

2000

1744

any_address = "::" # in6addr_any

2001

1745

else:

2002

any_address = "0.0.0.0" # INADDR_ANY

1746

any_address = socket.INADDR_ANY

2003

1747

self.server_address = (any_address,

2004

1748

self.server_address[1])

2005

1749

elif not self.server_address[1]:

2026

1770

"""

2027

1771

def __init__(self, server_address, RequestHandlerClass,

2028

1772

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

2029

gnutls_priority=None, use_dbus=True, socketfd=None):

1773

gnutls_priority=None, use_dbus=True):

2030

1774

self.enabled = False

2031

1775

self.clients = clients

2032

1776

if self.clients is None:

2036

1780

IPv6_TCPServer.__init__(self, server_address,

2037

1781

RequestHandlerClass,

2038

1782

interface = interface,

2039

use_ipv6 = use_ipv6,

2040

socketfd = socketfd)

1783

use_ipv6 = use_ipv6)

2041

1784

def server_activate(self):

2042

1785

if self.enabled:

2043

1786

return socketserver.TCPServer.server_activate(self)

2056

1799

2057

1800

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

2058

1801

proc = None, client_object=None):

1802

condition_names = {

1803

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

1804

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

1805

# blocking).

1806

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

1807

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

1808

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

1809

# broken, usually for pipes and

1810

# sockets).

1811

}

1812

conditions_string = ' | '.join(name

1813

for cond, name in

1814

condition_names.iteritems()

1815

if cond & condition)

2059

1816

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

2060

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

1817

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

2061

1818

# Wait for other process to exit

2062

1819

proc.join()

2063

1820

return False

2121

1878

return True

2122

1879

2123

1880

2124

def rfc3339_duration_to_delta(duration):

2125

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

2126

2127

>>> rfc3339_duration_to_delta("P7D")

2128

datetime.timedelta(7)

2129

>>> rfc3339_duration_to_delta("PT60S")

2130

datetime.timedelta(0, 60)

2131

>>> rfc3339_duration_to_delta("PT60M")

2132

datetime.timedelta(0, 3600)

2133

>>> rfc3339_duration_to_delta("PT24H")

2134

datetime.timedelta(1)

2135

>>> rfc3339_duration_to_delta("P1W")

2136

datetime.timedelta(7)

2137

>>> rfc3339_duration_to_delta("PT5M30S")

2138

datetime.timedelta(0, 330)

2139

>>> rfc3339_duration_to_delta("P1DT3M20S")

2140

datetime.timedelta(1, 200)

2141

"""

2142

2143

# Parsing an RFC 3339 duration with regular expressions is not

2144

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

2145

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

2146

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

2147

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

2148

# avoid excessive use of external libraries.

2149

2150

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

2151

Token = collections.namedtuple("Token",

2152

("regexp", # To match token; if

2153

# "value" is not None,

2154

# must have a "group"

2155

# containing digits

2156

"value", # datetime.timedelta or

2157

# None

2158

"followers")) # Tokens valid after

2159

# this token

2160

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

2161

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

2162

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

2163

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

2164

datetime.timedelta(seconds=1),

2165

frozenset((token_end,)))

2166

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

2167

datetime.timedelta(minutes=1),

2168

frozenset((token_second, token_end)))

2169

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

2170

datetime.timedelta(hours=1),

2171

frozenset((token_minute, token_end)))

2172

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

2173

None,

2174

frozenset((token_hour, token_minute,

2175

token_second)))

2176

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

2177

datetime.timedelta(days=1),

2178

frozenset((token_time, token_end)))

2179

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

2180

datetime.timedelta(weeks=4),

2181

frozenset((token_day, token_end)))

2182

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

2183

datetime.timedelta(weeks=52),

2184

frozenset((token_month, token_end)))

2185

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

2186

datetime.timedelta(weeks=1),

2187

frozenset((token_end,)))

2188

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

2189

frozenset((token_year, token_month,

2190

token_day, token_time,

2191

token_week))),

2192

# Define starting values

2193

value = datetime.timedelta() # Value so far

2194

found_token = None

2195

followers = frozenset(token_duration,) # Following valid tokens

2196

s = duration # String left to parse

2197

# Loop until end token is found

2198

while found_token is not token_end:

2199

# Search for any currently valid tokens

2200

for token in followers:

2201

match = token.regexp.match(s)

2202

if match is not None:

2203

# Token found

2204

if token.value is not None:

2205

# Value found, parse digits

2206

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

2207

# Add to value so far

2208

value += factor * token.value

2209

# Strip token from string

2210

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

2211

# Go to found token

2212

found_token = token

2213

# Set valid next tokens

2214

followers = found_token.followers

2215

break

2216

else:

2217

# No currently valid tokens were found

2218

raise ValueError("Invalid RFC 3339 duration")

2219

# End token found

2220

return value

2221

2222

2223

1881

def string_to_delta(interval):

2224

1882

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

2225

1883

2236

1894

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

2237

1895

datetime.timedelta(0, 330)

2238

1896

"""

2239

2240

try:

2241

return rfc3339_duration_to_delta(interval)

2242

except ValueError:

2243

pass

2244

2245

1897

timevalue = datetime.timedelta(0)

2246

1898

for s in interval.split():

2247

1899

try:

2258

1910

elif suffix == "w":

2259

1911

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

2260

1912

else:

2261

raise ValueError("Unknown suffix {0!r}"

2262

.format(suffix))

2263

except IndexError as e:

1913

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

1914

except (ValueError, IndexError) as e:

2264

1915

raise ValueError(*(e.args))

2265

1916

timevalue += delta

2266

1917

return timevalue

2279

1930

sys.exit()

2280

1931

if not noclose:

2281

1932

# Close all standard open file descriptors

2282

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

1933

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

2283

1934

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

2284

1935

raise OSError(errno.ENODEV,

2285

"{0} not a character device"

2286

.format(os.devnull))

1936

"%s not a character device"

1937

% os.path.devnull)

2287

1938

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

2288

1939

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

2289

1940

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

2298

1949

2299

1950

parser = argparse.ArgumentParser()

2300

1951

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

2301

version = "%(prog)s {0}".format(version),

1952

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

2302

1953

help="show version number and exit")

2303

1954

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

2304

1955

help="Bind to interface IF")

2310

1961

help="Run self-test")

2311

1962

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

2312

1963

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

2313

" to terminal", default=None)

1964

" to terminal")

2314

1965

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

2315

1966

help="Debug level for stdout output")

2316

1967

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

2323

1974

" files")

2324

1975

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

2325

1976

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

2326

" system bus interface", default=None)

1977

" system bus interface")

2327

1978

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

2328

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

2329

default=None)

1979

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

2330

1980

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

2331

1981

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

2332

" state", default=None)

2333

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

2334

help="Specify a file descriptor to a network"

2335

" socket to use instead of creating one")

1982

" state")

2336

1983

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

2337

1984

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

2338

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

2339

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

2340

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

2341

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

2342

default=None)

2343

1985

2344

1986

options = parser.parse_args()

2345

1987

2346

1988

if options.check:

2347

1989

import doctest

2348

fail_count, test_count = doctest.testmod()

2349

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

1990

doctest.testmod()

1991

sys.exit()

2350

1992

2351

1993

# Default values for config file for server-global settings

2352

1994

server_defaults = { "interface": "",

2354

1996

"port": "",

2355

1997

"debug": "False",

2356

1998

"priority":

2357

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

1999

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

2358

2000

"servicename": "Mandos",

2359

2001

"use_dbus": "True",

2360

2002

"use_ipv6": "True",

2361

2003

"debuglevel": "",

2362

2004

"restore": "True",

2363

"socket": "",

2364

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

2365

"foreground": "False",

2366

"zeroconf": "True",

2005

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

2367

2006

}

2368

2007

2369

2008

# Parse config file for server-global settings

2374

2013

# Convert the SafeConfigParser object to a dict

2375

2014

server_settings = server_config.defaults()

2376

2015

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

2377

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

2016

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

2378

2017

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

2379

2018

option)

2380

2019

if server_settings["port"]:

2381

2020

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

2382

2021

"port")

2383

if server_settings["socket"]:

2384

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

2385

"socket")

2386

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

2387

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

2388

# happen with a supplied network socket.

2389

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

2390

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

2391

["socket"])

2392

2022

del server_config

2393

2023

2394

2024

# Override the settings from the config file with command line

2396

2026

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

2397

2027

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

2398

2028

"use_dbus", "use_ipv6", "debuglevel", "restore",

2399

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

2029

"statedir"):

2400

2030

value = getattr(options, option)

2401

2031

if value is not None:

2402

2032

server_settings[option] = value

2405

2035

for option in server_settings.keys():

2406

2036

if type(server_settings[option]) is str:

2407

2037

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

2408

# Force all boolean options to be boolean

2409

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

2410

"foreground", "zeroconf"):

2411

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

2412

# Debug implies foreground

2413

if server_settings["debug"]:

2414

server_settings["foreground"] = True

2415

2038

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

2416

2039

2417

2040

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

2418

2041

2419

if (not server_settings["zeroconf"] and

2420

not (server_settings["port"]

2421

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

2422

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

2423

" Zeroconf")

2424

2425

2042

# For convenience

2426

2043

debug = server_settings["debug"]

2427

2044

debuglevel = server_settings["debuglevel"]

2429

2046

use_ipv6 = server_settings["use_ipv6"]

2430

2047

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

2431

2048

stored_state_file)

2432

foreground = server_settings["foreground"]

2433

zeroconf = server_settings["zeroconf"]

2434

2049

2435

2050

if debug:

2436

initlogger(debug, logging.DEBUG)

2051

initlogger(logging.DEBUG)

2437

2052

else:

2438

2053

if not debuglevel:

2439

initlogger(debug)

2054

initlogger()

2440

2055

else:

2441

2056

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

2442

initlogger(debug, level)

2057

initlogger(level)

2443

2058

2444

2059

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

2445

2060

syslogger.setFormatter(logging.Formatter

2446

('Mandos ({0}) [%(process)d]:'

2447

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

2448

.format(server_settings

2449

["servicename"])))

2061

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

2062

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

2063

% server_settings["servicename"]))

2450

2064

2451

2065

# Parse config file with clients

2452

client_config = configparser.SafeConfigParser(Client

2453

.client_defaults)

2066

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

2067

"extended_timeout": "15m",

2068

"interval": "2m",

2069

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

2070

"host": "",

2071

"approval_delay": "0s",

2072

"approval_duration": "1s",

2073

}

2074

client_config = configparser.SafeConfigParser(client_defaults)

2454

2075

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

2455

2076

"clients.conf"))

2456

2077

2457

2078

global mandos_dbus_service

2458

2079

mandos_dbus_service = None

2459

2080

2460

socketfd = None

2461

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

2462

socketfd = server_settings["socket"]

2463

2081

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

2464

2082

server_settings["port"]),

2465

2083

ClientHandler,

2468

2086

use_ipv6=use_ipv6,

2469

2087

gnutls_priority=

2470

2088

server_settings["priority"],

2471

use_dbus=use_dbus,

2472

socketfd=socketfd)

2473

if not foreground:

2474

pidfilename = "/run/mandos.pid"

2475

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

2476

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

2477

pidfile = None

2089

use_dbus=use_dbus)

2090

if not debug:

2091

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

2478

2092

try:

2479

2093

pidfile = open(pidfilename, "w")

2480

except IOError as e:

2481

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

2482

exc_info=e)

2094

except IOError:

2095

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

2483

2096

2484

for name in ("_mandos", "mandos", "nobody"):

2097

try:

2098

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

2099

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

2100

except KeyError:

2485

2101

try:

2486

uid = pwd.getpwnam(name).pw_uid

2487

gid = pwd.getpwnam(name).pw_gid

2488

break

2102

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

2103

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

2489

2104

except KeyError:

2490

continue

2491

else:

2492

uid = 65534

2493

gid = 65534

2105

try:

2106

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

2107

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

2108

except KeyError:

2109

uid = 65534

2110

gid = 65534

2494

2111

try:

2495

2112

os.setgid(gid)

2496

2113

os.setuid(uid)

2497

2114

except OSError as error:

2498

if error.errno != errno.EPERM:

2499

raise

2115

if error[0] != errno.EPERM:

2116

raise error

2500

2117

2501

2118

if debug:

2502

2119

# Enable all possible GnuTLS debugging

2513

2130

.gnutls_global_set_log_function(debug_gnutls))

2514

2131

2515

2132

# Redirect stdin so all checkers get /dev/null

2516

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

2133

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

2517

2134

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

2518

2135

if null > 2:

2519

2136

os.close(null)

2137

else:

2138

# No console logging

2139

logger.removeHandler(console)

2520

2140

2521

2141

# Need to fork before connecting to D-Bus

2522

if not foreground:

2142

if not debug:

2523

2143

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

2524

2144

daemon()

2525

2145

2526

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

2527

# need to inform gobject that threads will be used.

2528

gobject.threads_init()

2529

2530

2146

global main_loop

2531

2147

# From the Avahi example code

2532

DBusGMainLoop(set_as_default=True)

2148

DBusGMainLoop(set_as_default=True )

2533

2149

main_loop = gobject.MainLoop()

2534

2150

bus = dbus.SystemBus()

2535

2151

# End of Avahi example code

2541

2157

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

2542

2158

do_not_queue=True))

2543

2159

except dbus.exceptions.NameExistsException as e:

2544

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

2160

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

2545

2161

use_dbus = False

2546

2162

server_settings["use_dbus"] = False

2547

2163

tcp_server.use_dbus = False

2548

if zeroconf:

2549

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2550

service = AvahiServiceToSyslog(name =

2551

server_settings["servicename"],

2552

servicetype = "_mandos._tcp",

2553

protocol = protocol, bus = bus)

2554

if server_settings["interface"]:

2555

service.interface = (if_nametoindex

2556

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

2164

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2165

service = AvahiServiceToSyslog(name =

2166

server_settings["servicename"],

2167

servicetype = "_mandos._tcp",

2168

protocol = protocol, bus = bus)

2169

if server_settings["interface"]:

2170

service.interface = (if_nametoindex

2171

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

2557

2172

2558

2173

global multiprocessing_manager

2559

2174

multiprocessing_manager = multiprocessing.Manager()

2560

2175

2561

2176

client_class = Client

2562

2177

if use_dbus:

2563

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

2564

2565

client_settings = Client.config_parser(client_config)

2178

client_class = functools.partial(ClientDBusTransitional,

2179

bus = bus)

2180

2181

special_settings = {

2182

# Some settings need to be accessd by special methods;

2183

# booleans need .getboolean(), etc. Here is a list of them:

2184

"approved_by_default":

2185

lambda section:

2186

client_config.getboolean(section, "approved_by_default"),

2187

"enabled":

2188

lambda section:

2189

client_config.getboolean(section, "enabled"),

2190

}

2191

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

2192

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

2193

# with exceptions for any special settings as defined above

2194

client_settings = dict((clientname,

2195

dict((setting,

2196

(value

2197

if setting not in special_settings

2198

else special_settings[setting]

2199

(clientname)))

2200

for setting, value in

2201

client_config.items(clientname)))

2202

for clientname in client_config.sections())

2203

2566

2204

old_client_settings = {}

2567

clients_data = {}

2568

2569

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

2570

global wnull

2571

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

2572

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

2573

# mode

2574

if debug or not foreground:

2575

wnull.close()

2205

clients_data = []

2576

2206

2577

2207

# Get client data and settings from last running state.

2578

2208

if server_settings["restore"]:

2582

2212

(stored_state))

2583

2213

os.remove(stored_state_path)

2584

2214

except IOError as e:

2585

if e.errno == errno.ENOENT:

2586

logger.warning("Could not load persistent state: {0}"

2587

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

2588

else:

2589

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

2590

exc_info=e)

2215

logger.warning("Could not load persistent state: {0}"

2216

.format(e))

2217

if e.errno != errno.ENOENT:

2591

2218

raise

2592

except EOFError as e:

2593

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

2594

"EOFError:", exc_info=e)

2595

2219

2596

with PGPEngine() as pgp:

2597

for client_name, client in clients_data.iteritems():

2598

# Skip removed clients

2599

if client_name not in client_settings:

2600

continue

2220

with Crypto() as crypt:

2221

for client in clients_data:

2222

client_name = client["name"]

2601

2223

2602

2224

# Decide which value to use after restoring saved state.

2603

2225

# We have three different values: Old config file,

2612

2234

if (name != "secret" and

2613

2235

value != old_client_settings[client_name]

2614

2236

[name]):

2615

client[name] = value

2237

setattr(client, name, value)

2616

2238

except KeyError:

2617

2239

pass

2618

2240

2619

2241

# Clients who has passed its expire date can still be

2620

# enabled if its last checker was successful. Clients

2621

# whose checker succeeded before we stored its state is

2622

# assumed to have successfully run all checkers during

2623

# downtime.

2624

if client["enabled"]:

2625

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

2626

if not client["last_checked_ok"]:

2627

logger.warning(

2628

"disabling client {0} - Client never "

2629

"performed a successful checker"

2630

.format(client_name))

2631

client["enabled"] = False

2632

elif client["last_checker_status"] != 0:

2633

logger.warning(

2634

"disabling client {0} - Client "

2635

"last checker failed with error code {1}"

2636

.format(client_name,

2637

client["last_checker_status"]))

2242

# enabled if its last checker was sucessful. Clients

2243

# whose checker failed before we stored its state is

2244

# assumed to have failed all checkers during downtime.

2245

if client["enabled"] and client["last_checked_ok"]:

2246

if ((datetime.datetime.utcnow()

2247

- client["last_checked_ok"])

2248

> client["interval"]):

2249

if client["last_checker_status"] != 0:

2638

2250

client["enabled"] = False

2639

2251

else:

2640

2252

client["expires"] = (datetime.datetime

2641

2253

.utcnow()

2642

2254

+ client["timeout"])

2643

logger.debug("Last checker succeeded,"

2644

" keeping {0} enabled"

2645

.format(client_name))

2255

2256

client["changedstate"] = (multiprocessing_manager

2257

.Condition

2258

(multiprocessing_manager

2259

.Lock()))

2260

if use_dbus:

2261

new_client = (ClientDBusTransitional.__new__

2262

(ClientDBusTransitional))

2263

tcp_server.clients[client_name] = new_client

2264

new_client.bus = bus

2265

for name, value in client.iteritems():

2266

setattr(new_client, name, value)

2267

client_object_name = unicode(client_name).translate(

2268

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

2269

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

2270

new_client.dbus_object_path = (dbus.ObjectPath

2271

("/clients/"

2272

+ client_object_name))

2273

DBusObjectWithProperties.__init__(new_client,

2274

new_client.bus,

2275

new_client

2276

.dbus_object_path)

2277

else:

2278

tcp_server.clients[client_name] = (Client.__new__

2279

(Client))

2280

for name, value in client.iteritems():

2281

setattr(tcp_server.clients[client_name],

2282

name, value)

2283

2646

2284

try:

2647

client["secret"] = (

2648

pgp.decrypt(client["encrypted_secret"],

2649

client_settings[client_name]

2650

["secret"]))

2651

except PGPError:

2285

tcp_server.clients[client_name].secret = (

2286

crypt.decrypt(tcp_server.clients[client_name]

2287

.encrypted_secret,

2288

client_settings[client_name]

2289

["secret"]))

2290

except CryptoError:

2652

2291

# If decryption fails, we use secret from new settings

2653

logger.debug("Failed to decrypt {0} old secret"

2654

.format(client_name))

2655

client["secret"] = (

2292

tcp_server.clients[client_name].secret = (

2656

2293

client_settings[client_name]["secret"])

2657

2294

2658

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

2659

for client_name in (set(old_client_settings)

2660

- set(client_settings)):

2661

del clients_data[client_name]

2662

for client_name in (set(client_settings)

2663

- set(old_client_settings)):

2664

clients_data[client_name] = client_settings[client_name]

2665

2666

# Create all client objects

2667

for client_name, client in clients_data.iteritems():

2668

tcp_server.clients[client_name] = client_class(

2669

name = client_name, settings = client,

2670

server_settings = server_settings)

2295

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

2296

for clientname in set(old_client_settings) - set(client_settings):

2297

del tcp_server.clients[clientname]

2298

for clientname in set(client_settings) - set(old_client_settings):

2299

tcp_server.clients[clientname] = (client_class(name

2300

= clientname,

2301

config =

2302

client_settings

2303

[clientname]))

2671

2304

2672

2305

if not tcp_server.clients:

2673

2306

logger.warning("No clients defined")

2674

2675

if not foreground:

2676

if pidfile is not None:

2677

try:

2678

with pidfile:

2679

pid = os.getpid()

2680

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

2681

except IOError:

2682

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

2683

pidfilename, pid)

2684

del pidfile

2307

2308

if not debug:

2309

try:

2310

with pidfile:

2311

pid = os.getpid()

2312

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

2313

del pidfile

2314

except IOError:

2315

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

2316

pidfilename, pid)

2317

except NameError:

2318

# "pidfile" was never created

2319

pass

2685

2320

del pidfilename

2321

2322

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

2686

2323

2687

2324

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

2688

2325

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

2689

2326

2690

2327

if use_dbus:

2691

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

2692

"se.bsnet.fukt.Mandos"})

2693

class MandosDBusService(DBusObjectWithProperties):

2328

class MandosDBusService(dbus.service.Object):

2694

2329

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

2695

2330

def __init__(self):

2696

2331

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

2697

2332

_interface = "se.recompile.Mandos"

2698

2333

2699

@dbus_interface_annotations(_interface)

2700

def _foo(self):

2701

return { "org.freedesktop.DBus.Property"

2702

".EmitsChangedSignal":

2703

"false"}

2704

2705

2334

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

2706

2335

def ClientAdded(self, objpath):

2707

2336

"D-Bus signal"

2749

2378

2750

2379

del _interface

2751

2380

2752

mandos_dbus_service = MandosDBusService()

2381

class MandosDBusServiceTransitional(MandosDBusService):

2382

__metaclass__ = AlternateDBusNamesMetaclass

2383

mandos_dbus_service = MandosDBusServiceTransitional()

2753

2384

2754

2385

def cleanup():

2755

2386

"Cleanup function; run on exit"

2756

if zeroconf:

2757

service.cleanup()

2387

service.cleanup()

2758

2388

2759

2389

multiprocessing.active_children()

2760

wnull.close()

2761

2390

if not (tcp_server.clients or client_settings):

2762

2391

return

2763

2392

2764

2393

# Store client before exiting. Secrets are encrypted with key

2765

2394

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

2766

2395

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

2767

clients = {}

2768

with PGPEngine() as pgp:

2396

clients = []

2397

with Crypto() as crypt:

2769

2398

for client in tcp_server.clients.itervalues():

2770

2399

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

2771

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

2772

key)

2400

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

2401

key)

2773

2402

client_dict = {}

2774

2403

2775

# A list of attributes that can not be pickled

2776

# + secret.

2777

exclude = set(("bus", "changedstate", "secret",

2778

"checker", "server_settings"))

2404

# A list of attributes that will not be stored when

2405

# shutting down.

2406

exclude = set(("bus", "changedstate", "secret"))

2779

2407

for name, typ in (inspect.getmembers

2780

2408

(dbus.service.Object)):

2781

2409

exclude.add(name)

2786

2414

if attr not in exclude:

2787

2415

client_dict[attr] = getattr(client, attr)

2788

2416

2789

clients[client.name] = client_dict

2417

clients.append(client_dict)

2790

2418

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

2791

2419

2792

2420

try:

2793

with (tempfile.NamedTemporaryFile

2794

(mode='wb', suffix=".pickle", prefix='clients-',

2795

dir=os.path.dirname(stored_state_path),

2796

delete=False)) as stored_state:

2421

with os.fdopen(os.open(stored_state_path,

2422

os.O_CREAT|os.O_WRONLY|os.O_TRUNC,

2423

0600), "wb") as stored_state:

2797

2424

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

2798

tempname=stored_state.name

2799

os.rename(tempname, stored_state_path)

2800

2425

except (IOError, OSError) as e:

2801

if not debug:

2802

try:

2803

os.remove(tempname)

2804

except NameError:

2805

pass

2806

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

2807

logger.warning("Could not save persistent state: {0}"

2808

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

2809

else:

2810

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

2811

exc_info=e)

2426

logger.warning("Could not save persistent state: {0}"

2427

.format(e))

2428

if e.errno not in (errno.ENOENT, errno.EACCES):

2812

2429

raise

2813

2430

2814

2431

# Delete all clients, and settings from config

2839

2456

tcp_server.server_activate()

2840

2457

2841

2458

# Find out what port we got

2842

if zeroconf:

2843

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

2459

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

2844

2460

if use_ipv6:

2845

2461

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

2846

" flowinfo %d, scope_id %d",

2847

*tcp_server.socket.getsockname())

2462

" flowinfo %d, scope_id %d"

2463

% tcp_server.socket.getsockname())

2848

2464

else: # IPv4

2849

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

2850

*tcp_server.socket.getsockname())

2465

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

2466

% tcp_server.socket.getsockname())

2851

2467

2852

2468

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

2853

2469

2854

2470

try:

2855

if zeroconf:

2856

# From the Avahi example code

2857

try:

2858

service.activate()

2859

except dbus.exceptions.DBusException as error:

2860

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

2861

cleanup()

2862

sys.exit(1)

2863

# End of Avahi example code

2471

# From the Avahi example code

2472

try:

2473

service.activate()

2474

except dbus.exceptions.DBusException as error:

2475

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

2476

cleanup()

2477

sys.exit(1)

2478

# End of Avahi example code

2864

2479

2865

2480

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

2866

2481

lambda *args, **kwargs:

2870

2485

logger.debug("Starting main loop")

2871

2486

main_loop.run()

2872

2487

except AvahiError as error:

2873

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

2488

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

2874

2489

cleanup()

2875

2490

sys.exit(1)

2876

2491

except KeyboardInterrupt:

2881

2496

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

2882

2497

cleanup()

2883

2498

2499

2884

2500

if __name__ == '__main__':

2885

2501

main()