/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 = "1.6.4"

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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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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(" ", ""))

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if "secret" in section:

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

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elif "secfile" in section:

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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):

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

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'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():

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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

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self.expires = None

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455

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

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

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.replace(" ", ""))

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463

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")

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elif "secfile" in config:

467

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

468

(config["secfile"])),

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"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)

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

475

self.created = datetime.datetime.utcnow()

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

477

self.last_approval_request = None

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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"])

560

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self.checker = None

561

489

self.checker_initiator_tag = None

562

490

self.disable_initiator_tag = None

491

if self.enabled:

492

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

493

else:

494

self.expires = None

563

495

self.checker_callback_tag = None

496

self.checker_command = config["checker"]

564

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self.current_checker_command = None

565

self.approved = None

498

self._approved = None

499

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

500

True)

566

501

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"])

567

506

self.changedstate = (multiprocessing_manager

568

507

.Condition(multiprocessing_manager

569

508

.Lock()))

589

528

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

590

529

# Already enabled

591

530

return

531

self.send_changedstate()

592

532

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

593

533

self.enabled = True

594

534

self.last_enabled = datetime.datetime.utcnow()

595

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self.init_checker()

596

self.send_changedstate()

597

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def disable(self, quiet=True):

599

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"""Disable this client."""

600

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

601

540

return False

602

541

if not quiet:

542

self.send_changedstate()

543

if not quiet:

603

544

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

604

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

545

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

605

546

gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = None

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self.expires = None

608

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)

610

551

self.checker_initiator_tag = None

611

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self.stop_checker()

612

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self.enabled = False

613

if not quiet:

614

self.send_changedstate()

615

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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):

622

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

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# and every interval from then on.

624

if self.checker_initiator_tag is not None:

625

gobject.source_remove(self.checker_initiator_tag)

626

563

self.checker_initiator_tag = (gobject.timeout_add

627

564

(self.interval_milliseconds(),

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self.start_checker))

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

630

if self.disable_initiator_tag is not None:

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gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = (gobject.timeout_add

633

568

(self.timeout_milliseconds(),

634

569

self.disable))

640

575

self.checker_callback_tag = None

641

576

self.checker = None

642

577

if os.WIFEXITED(condition):

643

self.last_checker_status = os.WEXITSTATUS(condition)

578

self.last_checker_status = os.WEXITSTATUS(condition)

644

579

if self.last_checker_status == 0:

645

580

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

646

581

vars(self))

653

588

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

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589

vars(self))

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590

656

def checked_ok(self):

657

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

658

self.last_checked_ok = datetime.datetime.utcnow()

659

self.last_checker_status = 0

660

self.bump_timeout()

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662

def bump_timeout(self, timeout=None):

663

"""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

"""

664

597

if timeout is None:

665

598

timeout = self.timeout

599

self.last_checked_ok = datetime.datetime.utcnow()

666

600

if self.disable_initiator_tag is not None:

667

601

gobject.source_remove(self.disable_initiator_tag)

668

self.disable_initiator_tag = None

669

602

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

670

603

self.disable_initiator_tag = (gobject.timeout_add

671

(timedelta_to_milliseconds

604

(_timedelta_to_milliseconds

672

605

(timeout), self.disable))

673

606

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

674

607

681

614

If a checker already exists, leave it running and do

682

615

nothing."""

683

616

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

684

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

685

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

686

# would inevitably timeout, since no checker would get a

687

# 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

688

621

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

689

622

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

690

623

# should be.

692

625

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

693

626

try:

694

627

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

695

except AttributeError:

696

pass

697

except OSError as error:

698

if error.errno != errno.ECHILD:

699

raise

628

except (AttributeError, OSError) as error:

629

if (isinstance(error, OSError)

630

and error.errno != errno.ECHILD):

631

raise error

700

632

else:

701

633

if pid:

702

634

logger.warning("Checker was a zombie")

705

637

self.current_checker_command)

706

638

# Start a new checker if needed

707

639

if self.checker is None:

708

# Escape attributes for the shell

709

escaped_attrs = dict(

710

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

711

for attr in

712

self.runtime_expansions)

713

640

try:

714

command = self.checker_command % escaped_attrs

715

except TypeError as error:

716

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

717

self.checker_command, exc_info=error)

718

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

719

659

self.current_checker_command = command

720

660

try:

721

661

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

724

664

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

725

665

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

726

666

# always replaced by /dev/null.)

727

# The exception is when not debugging but nevertheless

728

# running in the foreground; use the previously

729

# created wnull.

730

popen_args = {}

731

if (not self.server_settings["debug"]

732

and self.server_settings["foreground"]):

733

popen_args.update({"stdout": wnull,

734

"stderr": wnull })

735

667

self.checker = subprocess.Popen(command,

736

668

close_fds=True,

737

shell=True, cwd="/",

738

**popen_args)

739

except OSError as error:

740

logger.error("Failed to start subprocess",

741

exc_info=error)

742

return True

743

self.checker_callback_tag = (gobject.child_watch_add

744

(self.checker.pid,

745

self.checker_callback,

746

data=command))

747

# The checker may have completed before the gobject

748

# watch was added. Check for this.

749

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.

750

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)

751

680

except OSError as error:

752

if error.errno == errno.ECHILD:

753

# This should never happen

754

logger.error("Child process vanished",

755

exc_info=error)

756

return True

757

raise

758

if pid:

759

gobject.source_remove(self.checker_callback_tag)

760

self.checker_callback(pid, status, command)

681

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

682

error)

761

683

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

762

684

return True

763

685

770

692

return

771

693

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

772

694

try:

773

self.checker.terminate()

695

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

774

696

#time.sleep(0.5)

775

697

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

776

# self.checker.kill()

698

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

777

699

except OSError as error:

778

700

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

779

701

raise

796

718

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

797

719

if byte_arrays and signature != "ay":

798

720

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

799

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

721

" signature %r" % signature)

800

722

def decorator(func):

801

723

func._dbus_is_property = True

802

724

func._dbus_interface = dbus_interface

810

732

return decorator

811

733

812

734

813

def dbus_interface_annotations(dbus_interface):

814

"""Decorator for marking functions returning interface annotations

815

816

Usage:

817

818

@dbus_interface_annotations("org.example.Interface")

819

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

820

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

821

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

822

"false"}

823

"""

824

def decorator(func):

825

func._dbus_is_interface = True

826

func._dbus_interface = dbus_interface

827

func._dbus_name = dbus_interface

828

return func

829

return decorator

830

831

832

def dbus_annotations(annotations):

833

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

834

Usage:

835

836

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

837

access="r")

838

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

839

"org.freedesktop.DBus.Property."

840

"EmitsChangedSignal": "false"})

841

def Property_dbus_property(self):

842

return dbus.Boolean(False)

843

"""

844

def decorator(func):

845

func._dbus_annotations = annotations

846

return func

847

return decorator

848

849

850

735

class DBusPropertyException(dbus.exceptions.DBusException):

851

736

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

852

737

"""

875

760

"""

876

761

877

762

@staticmethod

878

def _is_dbus_thing(thing):

879

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

880

881

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

882

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

883

"""

884

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

885

False)

763

def _is_dbus_property(obj):

764

return getattr(obj, "_dbus_is_property", False)

886

765

887

def _get_all_dbus_things(self, thing):

766

def _get_all_dbus_properties(self):

888

767

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

889

768

"""

890

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

891

name),

892

athing.__get__(self))

769

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

893

770

for cls in self.__class__.__mro__

894

for name, athing in

895

inspect.getmembers(cls,

896

self._is_dbus_thing(thing)))

771

for name, prop in

772

inspect.getmembers(cls, self._is_dbus_property))

897

773

898

774

def _get_dbus_property(self, interface_name, property_name):

899

775

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

901

777

"""

902

778

for cls in self.__class__.__mro__:

903

779

for name, value in (inspect.getmembers

904

(cls,

905

self._is_dbus_thing("property"))):

780

(cls, self._is_dbus_property)):

906

781

if (value._dbus_name == property_name

907

782

and value._dbus_interface == interface_name):

908

783

return value.__get__(self)

936

811

# The byte_arrays option is not supported yet on

937

812

# signatures other than "ay".

938

813

if prop._dbus_signature != "ay":

939

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

940

"'ay' signature {0!r}"

941

.format(prop._dbus_signature))

942

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

943

for byte in value))

814

raise ValueError

815

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

816

for byte in value))

944

817

prop(value)

945

818

946

819

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

952

825

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

953

826

"""

954

827

properties = {}

955

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

828

for name, prop in self._get_all_dbus_properties():

956

829

if (interface_name

957

830

and interface_name != prop._dbus_interface):

958

831

# Interface non-empty but did not match

973

846

path_keyword='object_path',

974

847

connection_keyword='connection')

975

848

def Introspect(self, object_path, connection):

976

"""Overloading of standard D-Bus method.

977

978

Inserts property tags and interface annotation tags.

849

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

979

850

"""

980

851

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

981

852

connection)

988

859

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

989

860

return e

990

861

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

991

# Add property tags

992

862

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

993

863

for name, prop

994

in self._get_all_dbus_things("property")

864

in self._get_all_dbus_properties()

995

865

if prop._dbus_interface

996

866

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

997

867

if_tag.appendChild(tag)

998

# Add annotation tags

999

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

1000

for tag in if_tag.getElementsByTagName(typ):

1001

annots = dict()

1002

for name, prop in (self.

1003

_get_all_dbus_things(typ)):

1004

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

1005

and prop._dbus_interface

1006

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

1007

annots.update(getattr

1008

(prop,

1009

"_dbus_annotations",

1010

{}))

1011

for name, value in annots.iteritems():

1012

ann_tag = document.createElement(

1013

"annotation")

1014

ann_tag.setAttribute("name", name)

1015

ann_tag.setAttribute("value", value)

1016

tag.appendChild(ann_tag)

1017

# Add interface annotation tags

1018

for annotation, value in dict(

1019

itertools.chain.from_iterable(

1020

annotations().iteritems()

1021

for name, annotations in

1022

self._get_all_dbus_things("interface")

1023

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

1024

)).iteritems():

1025

ann_tag = document.createElement("annotation")

1026

ann_tag.setAttribute("name", annotation)

1027

ann_tag.setAttribute("value", value)

1028

if_tag.appendChild(ann_tag)

1029

868

# Add the names to the return values for the

1030

869

# "org.freedesktop.DBus.Properties" methods

1031

870

if (if_tag.getAttribute("name")

1046

885

except (AttributeError, xml.dom.DOMException,

1047

886

xml.parsers.expat.ExpatError) as error:

1048

887

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

1049

exc_info=error)

888

error)

1050

889

return xmlstring

1051

890

1052

891

1053

def datetime_to_dbus(dt, variant_level=0):

892

def datetime_to_dbus (dt, variant_level=0):

1054

893

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

1055

894

if dt is None:

1056

895

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

1058

897

variant_level=variant_level)

1059

898

1060

899

1061

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1062

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

1063

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

1064

interface names according to the "alt_interface_names" mapping.

1065

Usage:

1066

1067

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

1068

"net.example.AlternateInterface"})

1069

class SampleDBusObject(dbus.service.Object):

1070

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

1071

def SampleDBusMethod():

1072

pass

1073

1074

The above "SampleDBusMethod" on "SampleDBusObject" will be

1075

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

1076

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

1077

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

1078

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

1079

1080

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

1081

(from DBusObjectWithProperties) and interfaces (from the

1082

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.

1083

904

"""

1084

def wrapper(cls):

1085

for orig_interface_name, alt_interface_name in (

1086

alt_interface_names.iteritems()):

1087

attr = {}

1088

interface_names = set()

1089

# Go though all attributes of the class

1090

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):

1091

912

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

1092

913

# with the wrong interface name

1093

914

if (not hasattr(attribute, "_dbus_interface")

1094

915

or not attribute._dbus_interface

1095

.startswith(orig_interface_name)):

916

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

1096

917

continue

1097

918

# Create an alternate D-Bus interface name based on

1098

919

# the current name

1099

920

alt_interface = (attribute._dbus_interface

1100

.replace(orig_interface_name,

1101

alt_interface_name))

1102

interface_names.add(alt_interface)

921

.replace("se.recompile.Mandos",

922

"se.bsnet.fukt.Mandos"))

1103

923

# Is this a D-Bus signal?

1104

924

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

1105

# Extract the original non-method undecorated

1106

# function by black magic

925

# Extract the original non-method function by

926

# black magic

1107

927

nonmethod_func = (dict(

1108

928

zip(attribute.func_code.co_freevars,

1109

929

attribute.__closure__))["func"]

1120

940

nonmethod_func.func_name,

1121

941

nonmethod_func.func_defaults,

1122

942

nonmethod_func.func_closure)))

1123

# Copy annotations, if any

1124

try:

1125

new_function._dbus_annotations = (

1126

dict(attribute._dbus_annotations))

1127

except AttributeError:

1128

pass

1129

943

# Define a creator of a function to call both the

1130

# original and alternate functions, so both the

1131

# original and alternate signals gets sent when

1132

# the function is called

944

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

945

# signals gets sent when the function is called

1133

946

def fixscope(func1, func2):

1134

947

"""This function is a scope container to pass

1135

948

func1 and func2 to the "call_both" function

1142

955

return call_both

1143

956

# Create the "call_both" function and add it to

1144

957

# the class

1145

attr[attrname] = fixscope(attribute, new_function)

958

attr[attrname] = fixscope(attribute,

959

new_function)

1146

960

# Is this a D-Bus method?

1147

961

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

1148

962

# Create a new, but exactly alike, function

1159

973

attribute.func_name,

1160

974

attribute.func_defaults,

1161

975

attribute.func_closure)))

1162

# Copy annotations, if any

1163

try:

1164

attr[attrname]._dbus_annotations = (

1165

dict(attribute._dbus_annotations))

1166

except AttributeError:

1167

pass

1168

976

# Is this a D-Bus property?

1169

977

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

1170

978

# Create a new, but exactly alike, function

1184

992

attribute.func_name,

1185

993

attribute.func_defaults,

1186

994

attribute.func_closure)))

1187

# Copy annotations, if any

1188

try:

1189

attr[attrname]._dbus_annotations = (

1190

dict(attribute._dbus_annotations))

1191

except AttributeError:

1192

pass

1193

# Is this a D-Bus interface?

1194

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

1195

# Create a new, but exactly alike, function

1196

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

1197

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

1198

# to the class.

1199

attr[attrname] = (dbus_interface_annotations

1200

(alt_interface)

1201

(types.FunctionType

1202

(attribute.func_code,

1203

attribute.func_globals,

1204

attribute.func_name,

1205

attribute.func_defaults,

1206

attribute.func_closure)))

1207

if deprecate:

1208

# Deprecate all alternate interfaces

1209

iname="_AlternateDBusNames_interface_annotation{0}"

1210

for interface_name in interface_names:

1211

@dbus_interface_annotations(interface_name)

1212

def func(self):

1213

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

1214

"true" }

1215

# Find an unused name

1216

for aname in (iname.format(i)

1217

for i in itertools.count()):

1218

if aname not in attr:

1219

attr[aname] = func

1220

break

1221

if interface_names:

1222

# Replace the class with a new subclass of it with

1223

# methods, signals, etc. as created above.

1224

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

1225

(cls,), attr)

1226

return cls

1227

return wrapper

1228

1229

1230

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

1231

"se.bsnet.fukt.Mandos"})

995

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

996

997

1232

998

class ClientDBus(Client, DBusObjectWithProperties):

1233

999

"""A Client class using D-Bus

1234

1000

1245

1011

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

1246

1012

self.bus = bus

1247

1013

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

1014

1015

self._approvals_pending = 0

1248

1016

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

1249

1017

# the D-Bus

1250

1018

client_object_name = unicode(self.name).translate(

1254

1022

("/clients/" + client_object_name))

1255

1023

DBusObjectWithProperties.__init__(self, self.bus,

1256

1024

self.dbus_object_path)

1257

1025

1258

1026

def notifychangeproperty(transform_func,

1259

1027

dbus_name, type_func=lambda x: x,

1260

1028

variant_level=1):

1283

1051

1284

1052

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

1285

1053

1054

1286

1055

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1287

1056

approvals_pending = notifychangeproperty(dbus.Boolean,

1288

1057

"ApprovalPending",

1295

1064

checker is not None)

1296

1065

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1297

1066

"LastCheckedOK")

1298

last_checker_status = notifychangeproperty(dbus.Int16,

1299

"LastCheckerStatus")

1300

1067

last_approval_request = notifychangeproperty(

1301

1068

datetime_to_dbus, "LastApprovalRequest")

1302

1069

approved_by_default = notifychangeproperty(dbus.Boolean,

1303

1070

"ApprovedByDefault")

1304

approval_delay = notifychangeproperty(dbus.UInt64,

1071

approval_delay = notifychangeproperty(dbus.UInt16,

1305

1072

"ApprovalDelay",

1306

1073

type_func =

1307

timedelta_to_milliseconds)

1074

_timedelta_to_milliseconds)

1308

1075

approval_duration = notifychangeproperty(

1309

dbus.UInt64, "ApprovalDuration",

1310

type_func = timedelta_to_milliseconds)

1076

dbus.UInt16, "ApprovalDuration",

1077

type_func = _timedelta_to_milliseconds)

1311

1078

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

1312

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

1079

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

1313

1080

type_func =

1314

timedelta_to_milliseconds)

1081

_timedelta_to_milliseconds)

1315

1082

extended_timeout = notifychangeproperty(

1316

dbus.UInt64, "ExtendedTimeout",

1317

type_func = timedelta_to_milliseconds)

1318

interval = notifychangeproperty(dbus.UInt64,

1083

dbus.UInt16, "ExtendedTimeout",

1084

type_func = _timedelta_to_milliseconds)

1085

interval = notifychangeproperty(dbus.UInt16,

1319

1086

"Interval",

1320

1087

type_func =

1321

timedelta_to_milliseconds)

1088

_timedelta_to_milliseconds)

1322

1089

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

1323

1090

1324

1091

del notifychangeproperty

1352

1119

*args, **kwargs)

1353

1120

1354

1121

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

1355

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

1356

1127

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

1357

1128

# Only if new checker process was started

1358

1129

if (self.checker is not None

1362

1133

return r

1363

1134

1364

1135

def _reset_approved(self):

1365

self.approved = None

1136

self._approved = None

1366

1137

return False

1367

1138

1368

1139

def approve(self, value=True):

1369

self.approved = value

1370

gobject.timeout_add(timedelta_to_milliseconds

1140

self.send_changedstate()

1141

self._approved = value

1142

gobject.timeout_add(_timedelta_to_milliseconds

1371

1143

(self.approval_duration),

1372

1144

self._reset_approved)

1373

self.send_changedstate()

1145

1374

1146

1375

1147

## D-Bus methods, signals & properties

1376

1148

_interface = "se.recompile.Mandos.Client"

1377

1149

1378

## Interfaces

1379

1380

@dbus_interface_annotations(_interface)

1381

def _foo(self):

1382

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

1383

"false"}

1384

1385

1150

## Signals

1386

1151

1387

1152

# CheckerCompleted - signal

1423

1188

"D-Bus signal"

1424

1189

return self.need_approval()

1425

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

1426

1199

## Methods

1427

1200

1428

1201

# Approve - method

1486

1259

access="readwrite")

1487

1260

def ApprovalDuration_dbus_property(self, value=None):

1488

1261

if value is None: # get

1489

return dbus.UInt64(timedelta_to_milliseconds(

1262

return dbus.UInt64(_timedelta_to_milliseconds(

1490

1263

self.approval_duration))

1491

1264

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

1492

1265

1506

1279

def Host_dbus_property(self, value=None):

1507

1280

if value is None: # get

1508

1281

return dbus.String(self.host)

1509

self.host = unicode(value)

1282

self.host = value

1510

1283

1511

1284

# Created - property

1512

1285

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

1538

1311

return

1539

1312

return datetime_to_dbus(self.last_checked_ok)

1540

1313

1541

# LastCheckerStatus - property

1542

@dbus_service_property(_interface, signature="n",

1543

access="read")

1544

def LastCheckerStatus_dbus_property(self):

1545

return dbus.Int16(self.last_checker_status)

1546

1547

1314

# Expires - property

1548

1315

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

1549

1316

def Expires_dbus_property(self):

1560

1327

def Timeout_dbus_property(self, value=None):

1561

1328

if value is None: # get

1562

1329

return dbus.UInt64(self.timeout_milliseconds())

1563

old_timeout = self.timeout

1564

1330

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

1565

# Reschedule disabling

1566

if self.enabled:

1567

now = datetime.datetime.utcnow()

1568

self.expires += self.timeout - old_timeout

1569

if self.expires <= now:

1570

# The timeout has passed

1571

self.disable()

1572

else:

1573

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

1574

is None):

1575

return

1576

gobject.source_remove(self.disable_initiator_tag)

1577

self.disable_initiator_tag = (

1578

gobject.timeout_add(

1579

timedelta_to_milliseconds(self.expires - now),

1580

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))

1581

1351

1582

1352

# ExtendedTimeout - property

1583

1353

@dbus_service_property(_interface, signature="t",

1609

1379

def Checker_dbus_property(self, value=None):

1610

1380

if value is None: # get

1611

1381

return dbus.String(self.checker_command)

1612

self.checker_command = unicode(value)

1382

self.checker_command = value

1613

1383

1614

1384

# CheckerRunning - property

1615

1385

@dbus_service_property(_interface, signature="b",

1644

1414

raise KeyError()

1645

1415

1646

1416

def __getattribute__(self, name):

1647

if name == '_pipe':

1417

if(name == '_pipe'):

1648

1418

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

1649

1419

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

1650

1420

data = self._pipe.recv()

1657

1427

return func

1658

1428

1659

1429

def __setattr__(self, name, value):

1660

if name == '_pipe':

1430

if(name == '_pipe'):

1661

1431

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

1662

1432

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

1663

1433

1664

1434

1435

class ClientDBusTransitional(ClientDBus):

1436

__metaclass__ = AlternateDBusNamesMetaclass

1437

1438

1665

1439

class ClientHandler(socketserver.BaseRequestHandler, object):

1666

1440

"""A class to handle client connections.

1667

1441

1703

1477

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

1704

1478

try:

1705

1479

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

1706

raise RuntimeError(line)

1480

raise RuntimeError

1707

1481

except (ValueError, IndexError, RuntimeError) as error:

1708

1482

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

1709

1483

return

1728

1502

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

1729

1503

return

1730

1504

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

1505

if self.server.use_dbus:

1506

# Emit D-Bus signal

1507

client.NewRequest(str(self.client_address))

1731

1508

1732

1509

try:

1733

1510

client = ProxyClient(child_pipe, fpr,

1749

1526

client.Rejected("Disabled")

1750

1527

return

1751

1528

1752

if client.approved or not client.approval_delay:

1529

if client._approved or not client.approval_delay:

1753

1530

#We are approved or approval is disabled

1754

1531

break

1755

elif client.approved is None:

1532

elif client._approved is None:

1756

1533

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

1757

1534

client.name)

1758

1535

if self.server.use_dbus:

1771

1548

#wait until timeout or approved

1772

1549

time = datetime.datetime.now()

1773

1550

client.changedstate.acquire()

1774

client.changedstate.wait(

1775

float(timedelta_to_milliseconds(delay)

1776

/ 1000))

1551

(client.changedstate.wait

1552

(float(client._timedelta_to_milliseconds(delay)

1553

/ 1000)))

1777

1554

client.changedstate.release()

1778

1555

time2 = datetime.datetime.now()

1779

1556

if (time2 - time) >= delay:

1795

1572

try:

1796

1573

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

1797

1574

except gnutls.errors.GNUTLSError as error:

1798

logger.warning("gnutls send failed",

1799

exc_info=error)

1575

logger.warning("gnutls send failed")

1800

1576

return

1801

1577

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

1802

1578

sent, len(client.secret)

1805

1581

1806

1582

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

1807

1583

# bump the timeout using extended_timeout

1808

client.bump_timeout(client.extended_timeout)

1584

client.checked_ok(client.extended_timeout)

1809

1585

if self.server.use_dbus:

1810

1586

# Emit D-Bus signal

1811

1587

client.GotSecret()

1816

1592

try:

1817

1593

session.bye()

1818

1594

except gnutls.errors.GNUTLSError as error:

1819

logger.warning("GnuTLS bye failed",

1820

exc_info=error)

1595

logger.warning("GnuTLS bye failed")

1821

1596

1822

1597

@staticmethod

1823

1598

def peer_certificate(session):

1888

1663

def sub_process_main(self, request, address):

1889

1664

try:

1890

1665

self.finish_request(request, address)

1891

except Exception:

1666

except:

1892

1667

self.handle_error(request, address)

1893

1668

self.close_request(request)

1894

1669

1895

1670

def process_request(self, request, address):

1896

1671

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

1897

1672

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

1898

args = (request, address))

1673

args = (request,

1674

address))

1899

1675

proc.start()

1900

1676

return proc

1901

1677

1916

1692

1917

1693

def add_pipe(self, parent_pipe, proc):

1918

1694

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

1919

raise NotImplementedError()

1695

raise NotImplementedError

1920

1696

1921

1697

1922

1698

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1929

1705

use_ipv6: Boolean; to use IPv6 or not

1930

1706

"""

1931

1707

def __init__(self, server_address, RequestHandlerClass,

1932

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

1933

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

1934

creating a new one with socket.socket().

1935

"""

1708

interface=None, use_ipv6=True):

1936

1709

self.interface = interface

1937

1710

if use_ipv6:

1938

1711

self.address_family = socket.AF_INET6

1939

if socketfd is not None:

1940

# Save the file descriptor

1941

self.socketfd = socketfd

1942

# Save the original socket.socket() function

1943

self.socket_socket = socket.socket

1944

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

1945

#

1946

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

1947

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

1948

# patching socket.socket.)

1949

#

1950

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

1951

@functools.wraps(socket.socket)

1952

def socket_wrapper(*args, **kwargs):

1953

# Restore original function so subsequent calls are

1954

# not affected.

1955

socket.socket = self.socket_socket

1956

del self.socket_socket

1957

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

1958

# saved file descriptor.

1959

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

1960

# Replace socket.socket() function with wrapper

1961

socket.socket = socket_wrapper

1962

# The socketserver.TCPServer.__init__ will call

1963

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

1964

# socket_wrapper(), if socketfd was set.

1965

1712

socketserver.TCPServer.__init__(self, server_address,

1966

1713

RequestHandlerClass)

1967

1968

1714

def server_bind(self):

1969

1715

"""This overrides the normal server_bind() function

1970

1716

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

1978

1724

try:

1979

1725

self.socket.setsockopt(socket.SOL_SOCKET,

1980

1726

SO_BINDTODEVICE,

1981

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

1727

str(self.interface

1728

+ '\0'))

1982

1729

except socket.error as error:

1983

if error.errno == errno.EPERM:

1984

logger.error("No permission to bind to"

1985

" interface %s", self.interface)

1986

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:

1987

1735

logger.error("SO_BINDTODEVICE not available;"

1988

1736

" cannot bind to interface %s",

1989

1737

self.interface)

1990

elif error.errno == errno.ENODEV:

1991

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

1992

" cannot bind", self.interface)

1993

1738

else:

1994

1739

raise

1995

1740

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

1998

1743

if self.address_family == socket.AF_INET6:

1999

1744

any_address = "::" # in6addr_any

2000

1745

else:

2001

any_address = "0.0.0.0" # INADDR_ANY

1746

any_address = socket.INADDR_ANY

2002

1747

self.server_address = (any_address,

2003

1748

self.server_address[1])

2004

1749

elif not self.server_address[1]:

2025

1770

"""

2026

1771

def __init__(self, server_address, RequestHandlerClass,

2027

1772

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

2028

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

1773

gnutls_priority=None, use_dbus=True):

2029

1774

self.enabled = False

2030

1775

self.clients = clients

2031

1776

if self.clients is None:

2035

1780

IPv6_TCPServer.__init__(self, server_address,

2036

1781

RequestHandlerClass,

2037

1782

interface = interface,

2038

use_ipv6 = use_ipv6,

2039

socketfd = socketfd)

1783

use_ipv6 = use_ipv6)

2040

1784

def server_activate(self):

2041

1785

if self.enabled:

2042

1786

return socketserver.TCPServer.server_activate(self)

2055

1799

2056

1800

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

2057

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)

2058

1816

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

2059

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

1817

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

2060

1818

# Wait for other process to exit

2061

1819

proc.join()

2062

1820

return False

2120

1878

return True

2121

1879

2122

1880

2123

def rfc3339_duration_to_delta(duration):

2124

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

2125

2126

>>> rfc3339_duration_to_delta("P7D")

2127

datetime.timedelta(7)

2128

>>> rfc3339_duration_to_delta("PT60S")

2129

datetime.timedelta(0, 60)

2130

>>> rfc3339_duration_to_delta("PT60M")

2131

datetime.timedelta(0, 3600)

2132

>>> rfc3339_duration_to_delta("PT24H")

2133

datetime.timedelta(1)

2134

>>> rfc3339_duration_to_delta("P1W")

2135

datetime.timedelta(7)

2136

>>> rfc3339_duration_to_delta("PT5M30S")

2137

datetime.timedelta(0, 330)

2138

>>> rfc3339_duration_to_delta("P1DT3M20S")

2139

datetime.timedelta(1, 200)

2140

"""

2141

2142

# Parsing an RFC 3339 duration with regular expressions is not

2143

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

2144

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

2145

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

2146

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

2147

# avoid excessive use of external libraries.

2148

2149

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

2150

Token = collections.namedtuple("Token",

2151

("regexp", # To match token; if

2152

# "value" is not None,

2153

# must have a "group"

2154

# containing digits

2155

"value", # datetime.timedelta or

2156

# None

2157

"followers")) # Tokens valid after

2158

# this token

2159

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

2160

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

2161

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

2162

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

2163

datetime.timedelta(seconds=1),

2164

frozenset((token_end,)))

2165

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

2166

datetime.timedelta(minutes=1),

2167

frozenset((token_second, token_end)))

2168

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

2169

datetime.timedelta(hours=1),

2170

frozenset((token_minute, token_end)))

2171

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

2172

None,

2173

frozenset((token_hour, token_minute,

2174

token_second)))

2175

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

2176

datetime.timedelta(days=1),

2177

frozenset((token_time, token_end)))

2178

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

2179

datetime.timedelta(weeks=4),

2180

frozenset((token_day, token_end)))

2181

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

2182

datetime.timedelta(weeks=52),

2183

frozenset((token_month, token_end)))

2184

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

2185

datetime.timedelta(weeks=1),

2186

frozenset((token_end,)))

2187

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

2188

frozenset((token_year, token_month,

2189

token_day, token_time,

2190

token_week))),

2191

# Define starting values

2192

value = datetime.timedelta() # Value so far

2193

found_token = None

2194

followers = frozenset(token_duration,) # Following valid tokens

2195

s = duration # String left to parse

2196

# Loop until end token is found

2197

while found_token is not token_end:

2198

# Search for any currently valid tokens

2199

for token in followers:

2200

match = token.regexp.match(s)

2201

if match is not None:

2202

# Token found

2203

if token.value is not None:

2204

# Value found, parse digits

2205

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

2206

# Add to value so far

2207

value += factor * token.value

2208

# Strip token from string

2209

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

2210

# Go to found token

2211

found_token = token

2212

# Set valid next tokens

2213

followers = found_token.followers

2214

break

2215

else:

2216

# No currently valid tokens were found

2217

raise ValueError("Invalid RFC 3339 duration")

2218

# End token found

2219

return value

2220

2221

2222

1881

def string_to_delta(interval):

2223

1882

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

2224

1883

2235

1894

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

2236

1895

datetime.timedelta(0, 330)

2237

1896

"""

2238

2239

try:

2240

return rfc3339_duration_to_delta(interval)

2241

except ValueError:

2242

pass

2243

2244

1897

timevalue = datetime.timedelta(0)

2245

1898

for s in interval.split():

2246

1899

try:

2257

1910

elif suffix == "w":

2258

1911

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

2259

1912

else:

2260

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

2261

.format(suffix))

2262

except IndexError as e:

1913

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

1914

except (ValueError, IndexError) as e:

2263

1915

raise ValueError(*(e.args))

2264

1916

timevalue += delta

2265

1917

return timevalue

2278

1930

sys.exit()

2279

1931

if not noclose:

2280

1932

# Close all standard open file descriptors

2281

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

1933

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

2282

1934

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

2283

1935

raise OSError(errno.ENODEV,

2284

"{0} not a character device"

2285

.format(os.devnull))

1936

"%s not a character device"

1937

% os.path.devnull)

2286

1938

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

2287

1939

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

2288

1940

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

2297

1949

2298

1950

parser = argparse.ArgumentParser()

2299

1951

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

2300

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

1952

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

2301

1953

help="show version number and exit")

2302

1954

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

2303

1955

help="Bind to interface IF")

2309

1961

help="Run self-test")

2310

1962

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

2311

1963

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

2312

" to terminal", default=None)

1964

" to terminal")

2313

1965

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

2314

1966

help="Debug level for stdout output")

2315

1967

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

2322

1974

" files")

2323

1975

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

2324

1976

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

2325

" system bus interface", default=None)

1977

" system bus interface")

2326

1978

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

2327

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

2328

default=None)

1979

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

2329

1980

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

2330

1981

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

2331

" state", default=None)

2332

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

2333

help="Specify a file descriptor to a network"

2334

" socket to use instead of creating one")

1982

" state")

2335

1983

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

2336

1984

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

2337

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

2338

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

2339

1985

2340

1986

options = parser.parse_args()

2341

1987

2342

1988

if options.check:

2343

1989

import doctest

2344

fail_count, test_count = doctest.testmod()

2345

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

1990

doctest.testmod()

1991

sys.exit()

2346

1992

2347

1993

# Default values for config file for server-global settings

2348

1994

server_defaults = { "interface": "",

2350

1996

"port": "",

2351

1997

"debug": "False",

2352

1998

"priority":

2353

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

1999

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

2354

2000

"servicename": "Mandos",

2355

2001

"use_dbus": "True",

2356

2002

"use_ipv6": "True",

2357

2003

"debuglevel": "",

2358

2004

"restore": "True",

2359

"socket": "",

2360

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

2361

"foreground": "False",

2005

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

2362

2006

}

2363

2007

2364

2008

# Parse config file for server-global settings

2369

2013

# Convert the SafeConfigParser object to a dict

2370

2014

server_settings = server_config.defaults()

2371

2015

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

2372

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

2016

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

2373

2017

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

2374

2018

option)

2375

2019

if server_settings["port"]:

2376

2020

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

2377

2021

"port")

2378

if server_settings["socket"]:

2379

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

2380

"socket")

2381

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

2382

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

2383

# happen with a supplied network socket.

2384

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

2385

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

2386

["socket"])

2387

2022

del server_config

2388

2023

2389

2024

# Override the settings from the config file with command line

2391

2026

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

2392

2027

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

2393

2028

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

2394

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

2029

"statedir"):

2395

2030

value = getattr(options, option)

2396

2031

if value is not None:

2397

2032

server_settings[option] = value

2400

2035

for option in server_settings.keys():

2401

2036

if type(server_settings[option]) is str:

2402

2037

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

2403

# Force all boolean options to be boolean

2404

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

2405

"foreground"):

2406

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

2407

# Debug implies foreground

2408

if server_settings["debug"]:

2409

server_settings["foreground"] = True

2410

2038

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

2411

2039

2412

2040

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

2418

2046

use_ipv6 = server_settings["use_ipv6"]

2419

2047

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

2420

2048

stored_state_file)

2421

foreground = server_settings["foreground"]

2422

2049

2423

2050

if debug:

2424

initlogger(debug, logging.DEBUG)

2051

initlogger(logging.DEBUG)

2425

2052

else:

2426

2053

if not debuglevel:

2427

initlogger(debug)

2054

initlogger()

2428

2055

else:

2429

2056

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

2430

initlogger(debug, level)

2057

initlogger(level)

2431

2058

2432

2059

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

2433

2060

syslogger.setFormatter(logging.Formatter

2434

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

2435

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

2436

.format(server_settings

2437

["servicename"])))

2061

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

2062

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

2063

% server_settings["servicename"]))

2438

2064

2439

2065

# Parse config file with clients

2440

client_config = configparser.SafeConfigParser(Client

2441

.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)

2442

2075

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

2443

2076

"clients.conf"))

2444

2077

2453

2086

use_ipv6=use_ipv6,

2454

2087

gnutls_priority=

2455

2088

server_settings["priority"],

2456

use_dbus=use_dbus,

2457

socketfd=(server_settings["socket"]

2458

or None))

2459

if not foreground:

2460

pidfilename = "/run/mandos.pid"

2461

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

2462

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

2463

pidfile = None

2089

use_dbus=use_dbus)

2090

if not debug:

2091

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

2464

2092

try:

2465

2093

pidfile = open(pidfilename, "w")

2466

except IOError as e:

2467

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

2468

exc_info=e)

2094

except IOError:

2095

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

2469

2096

2470

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:

2471

2101

try:

2472

uid = pwd.getpwnam(name).pw_uid

2473

gid = pwd.getpwnam(name).pw_gid

2474

break

2102

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

2103

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

2475

2104

except KeyError:

2476

continue

2477

else:

2478

uid = 65534

2479

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

2480

2111

try:

2481

2112

os.setgid(gid)

2482

2113

os.setuid(uid)

2483

2114

except OSError as error:

2484

if error.errno != errno.EPERM:

2485

raise

2115

if error[0] != errno.EPERM:

2116

raise error

2486

2117

2487

2118

if debug:

2488

2119

# Enable all possible GnuTLS debugging

2499

2130

.gnutls_global_set_log_function(debug_gnutls))

2500

2131

2501

2132

# Redirect stdin so all checkers get /dev/null

2502

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

2133

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

2503

2134

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

2504

2135

if null > 2:

2505

2136

os.close(null)

2137

else:

2138

# No console logging

2139

logger.removeHandler(console)

2506

2140

2507

2141

# Need to fork before connecting to D-Bus

2508

if not foreground:

2142

if not debug:

2509

2143

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

2510

2144

daemon()

2511

2145

2512

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

2513

# need to inform gobject that threads will be used.

2514

gobject.threads_init()

2515

2516

2146

global main_loop

2517

2147

# From the Avahi example code

2518

DBusGMainLoop(set_as_default=True)

2148

DBusGMainLoop(set_as_default=True )

2519

2149

main_loop = gobject.MainLoop()

2520

2150

bus = dbus.SystemBus()

2521

2151

# End of Avahi example code

2527

2157

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

2528

2158

do_not_queue=True))

2529

2159

except dbus.exceptions.NameExistsException as e:

2530

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

2160

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

2531

2161

use_dbus = False

2532

2162

server_settings["use_dbus"] = False

2533

2163

tcp_server.use_dbus = False

2545

2175

2546

2176

client_class = Client

2547

2177

if use_dbus:

2548

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

2549

2550

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

2551

2204

old_client_settings = {}

2552

clients_data = {}

2553

2554

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

2555

global wnull

2556

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

2557

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

2558

# mode

2559

if debug or not foreground:

2560

wnull.close()

2205

clients_data = []

2561

2206

2562

2207

# Get client data and settings from last running state.

2563

2208

if server_settings["restore"]:

2567

2212

(stored_state))

2568

2213

os.remove(stored_state_path)

2569

2214

except IOError as e:

2570

if e.errno == errno.ENOENT:

2571

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

2572

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

2573

else:

2574

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

2575

exc_info=e)

2215

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

2216

.format(e))

2217

if e.errno != errno.ENOENT:

2576

2218

raise

2577

except EOFError as e:

2578

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

2579

"EOFError:", exc_info=e)

2580

2219

2581

with PGPEngine() as pgp:

2582

for client_name, client in clients_data.iteritems():

2583

# Skip removed clients

2584

if client_name not in client_settings:

2585

continue

2220

with Crypto() as crypt:

2221

for client in clients_data:

2222

client_name = client["name"]

2586

2223

2587

2224

# Decide which value to use after restoring saved state.

2588

2225

# We have three different values: Old config file,

2597

2234

if (name != "secret" and

2598

2235

value != old_client_settings[client_name]

2599

2236

[name]):

2600

client[name] = value

2237

setattr(client, name, value)

2601

2238

except KeyError:

2602

2239

pass

2603

2240

2604

2241

# Clients who has passed its expire date can still be

2605

# enabled if its last checker was successful. Clients

2606

# whose checker succeeded before we stored its state is

2607

# assumed to have successfully run all checkers during

2608

# downtime.

2609

if client["enabled"]:

2610

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

2611

if not client["last_checked_ok"]:

2612

logger.warning(

2613

"disabling client {0} - Client never "

2614

"performed a successful checker"

2615

.format(client_name))

2616

client["enabled"] = False

2617

elif client["last_checker_status"] != 0:

2618

logger.warning(

2619

"disabling client {0} - Client "

2620

"last checker failed with error code {1}"

2621

.format(client_name,

2622

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:

2623

2250

client["enabled"] = False

2624

2251

else:

2625

2252

client["expires"] = (datetime.datetime

2626

2253

.utcnow()

2627

2254

+ client["timeout"])

2628

logger.debug("Last checker succeeded,"

2629

" keeping {0} enabled"

2630

.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

2631

2284

try:

2632

client["secret"] = (

2633

pgp.decrypt(client["encrypted_secret"],

2634

client_settings[client_name]

2635

["secret"]))

2636

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:

2637

2291

# If decryption fails, we use secret from new settings

2638

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

2639

.format(client_name))

2640

client["secret"] = (

2292

tcp_server.clients[client_name].secret = (

2641

2293

client_settings[client_name]["secret"])

2642

2294

2643

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

2644

for client_name in (set(old_client_settings)

2645

- set(client_settings)):

2646

del clients_data[client_name]

2647

for client_name in (set(client_settings)

2648

- set(old_client_settings)):

2649

clients_data[client_name] = client_settings[client_name]

2650

2651

# Create all client objects

2652

for client_name, client in clients_data.iteritems():

2653

tcp_server.clients[client_name] = client_class(

2654

name = client_name, settings = client,

2655

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]))

2656

2304

2657

2305

if not tcp_server.clients:

2658

2306

logger.warning("No clients defined")

2659

2660

if not foreground:

2661

if pidfile is not None:

2662

try:

2663

with pidfile:

2664

pid = os.getpid()

2665

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

2666

except IOError:

2667

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

2668

pidfilename, pid)

2669

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

2670

2320

del pidfilename

2321

2322

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

2671

2323

2672

2324

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

2673

2325

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

2674

2326

2675

2327

if use_dbus:

2676

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

2677

"se.bsnet.fukt.Mandos"})

2678

class MandosDBusService(DBusObjectWithProperties):

2328

class MandosDBusService(dbus.service.Object):

2679

2329

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

2680

2330

def __init__(self):

2681

2331

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

2682

2332

_interface = "se.recompile.Mandos"

2683

2333

2684

@dbus_interface_annotations(_interface)

2685

def _foo(self):

2686

return { "org.freedesktop.DBus.Property"

2687

".EmitsChangedSignal":

2688

"false"}

2689

2690

2334

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

2691

2335

def ClientAdded(self, objpath):

2692

2336

"D-Bus signal"

2734

2378

2735

2379

del _interface

2736

2380

2737

mandos_dbus_service = MandosDBusService()

2381

class MandosDBusServiceTransitional(MandosDBusService):

2382

__metaclass__ = AlternateDBusNamesMetaclass

2383

mandos_dbus_service = MandosDBusServiceTransitional()

2738

2384

2739

2385

def cleanup():

2740

2386

"Cleanup function; run on exit"

2741

2387

service.cleanup()

2742

2388

2743

2389

multiprocessing.active_children()

2744

wnull.close()

2745

2390

if not (tcp_server.clients or client_settings):

2746

2391

return

2747

2392

2748

2393

# Store client before exiting. Secrets are encrypted with key

2749

2394

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

2750

2395

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

2751

clients = {}

2752

with PGPEngine() as pgp:

2396

clients = []

2397

with Crypto() as crypt:

2753

2398

for client in tcp_server.clients.itervalues():

2754

2399

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

2755

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

2756

key)

2400

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

2401

key)

2757

2402

client_dict = {}

2758

2403

2759

# A list of attributes that can not be pickled

2760

# + secret.

2761

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

2762

"checker", "server_settings"))

2404

# A list of attributes that will not be stored when

2405

# shutting down.

2406

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

2763

2407

for name, typ in (inspect.getmembers

2764

2408

(dbus.service.Object)):

2765

2409

exclude.add(name)

2770

2414

if attr not in exclude:

2771

2415

client_dict[attr] = getattr(client, attr)

2772

2416

2773

clients[client.name] = client_dict

2417

clients.append(client_dict)

2774

2418

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

2775

2419

2776

2420

try:

2777

with (tempfile.NamedTemporaryFile

2778

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

2779

dir=os.path.dirname(stored_state_path),

2780

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:

2781

2424

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

2782

tempname=stored_state.name

2783

os.rename(tempname, stored_state_path)

2784

2425

except (IOError, OSError) as e:

2785

if not debug:

2786

try:

2787

os.remove(tempname)

2788

except NameError:

2789

pass

2790

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

2791

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

2792

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

2793

else:

2794

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

2795

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):

2796

2429

raise

2797

2430

2798

2431

# Delete all clients, and settings from config

2826

2459

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

2827

2460

if use_ipv6:

2828

2461

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

2829

" flowinfo %d, scope_id %d",

2830

*tcp_server.socket.getsockname())

2462

" flowinfo %d, scope_id %d"

2463

% tcp_server.socket.getsockname())

2831

2464

else: # IPv4

2832

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

2833

*tcp_server.socket.getsockname())

2465

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

2466

% tcp_server.socket.getsockname())

2834

2467

2835

2468

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

2836

2469

2839

2472

try:

2840

2473

service.activate()

2841

2474

except dbus.exceptions.DBusException as error:

2842

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

2475

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

2843

2476

cleanup()

2844

2477

sys.exit(1)

2845

2478

# End of Avahi example code

2852

2485

logger.debug("Starting main loop")

2853

2486

main_loop.run()

2854

2487

except AvahiError as error:

2855

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

2488

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

2856

2489

cleanup()

2857

2490

sys.exit(1)

2858

2491

except KeyboardInterrupt:

2863

2496

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

2864

2497

cleanup()

2865

2498

2499

2866

2500

if __name__ == '__main__':

2867

2501

main()