/mandos/trunk : revision 729

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#!/usr/bin/python

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#!/usr/bin/python2.7

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# -*- mode: python; coding: utf-8 -*-

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#

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# Mandos server - give out binary blobs to connecting clients.

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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 = "1.4.1"

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version = "1.6.8"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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

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

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return interface_index

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler

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(facility =

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logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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class PGPEngine(object):

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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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 PGPError(e)

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self.gnupg.passphrase = None

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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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return ciphertext

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def decrypt(self, data, password):

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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 PGPError(e)

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self.gnupg.passphrase = None

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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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return decrypted_plaintext

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class AvahiError(Exception):

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

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self.value = value

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

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def __unicode__(self):

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return unicode(repr(self.value))

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

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**kwargs)

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class AvahiServiceError(AvahiError):

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pass

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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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("DBusException: %s", error)

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

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self.cleanup()

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os._exit(1)

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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: %s"

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% unicode(error))

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

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.format(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 (%s) [%%(process)d]:'

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

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% self.name))

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

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

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.format(self.name)))

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return ret

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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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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, or None.

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checker, -2 means no checker completed yet.

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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 password has been sent

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extended_timeout: extra long timeout when secret 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", "fingerprint",

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

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

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

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"extended_timeout": "15m",

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"interval": "2m",

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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": "0s",

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"approval_duration": "1s",

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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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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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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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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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"""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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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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# 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, "enabled")

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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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"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 %s"

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% section)

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

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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["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"] = None

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if client["enabled"]:

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client["last_enabled"] = datetime.datetime.utcnow()

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client["expires"] = (datetime.datetime.utcnow()

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+ client["timeout"])

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else:

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client["last_enabled"] = None

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client["expires"] = 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):

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

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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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for setting, value in settings.items():

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

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self.created = settings.get("created", datetime.datetime.utcnow())

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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

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self.checker = None

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self.checker_initiator_tag = None

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

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# Already enabled

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return

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self.send_changedstate()

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

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self.enabled = True

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self.last_enabled = datetime.datetime.utcnow()

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self.init_checker()

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self.send_changedstate()

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def disable(self, quiet=True):

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"""Disable this client."""

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

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return False

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if not quiet:

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self.send_changedstate()

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if not quiet:

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

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

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

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gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = None

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self.expires = None

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

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

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gobject.source_remove(self.checker_initiator_tag)

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self.checker_initiator_tag = None

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self.stop_checker()

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self.enabled = False

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if not quiet:

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self.send_changedstate()

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

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return False

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def init_checker(self):

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

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# and every interval from then on.

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if self.checker_initiator_tag is not None:

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gobject.source_remove(self.checker_initiator_tag)

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self.checker_initiator_tag = (gobject.timeout_add

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(self.interval_milliseconds(),

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(int(self.interval

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.total_seconds() * 1000),

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self.start_checker))

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

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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

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(self.timeout_milliseconds(),

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self.disable))

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(int(self.timeout

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.total_seconds() * 1000),

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self.disable))

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# Also start a new checker *right now*.

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self.start_checker()

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

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vars(self))

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def checked_ok(self, timeout=None):

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"""Bump up the timeout for this client.

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

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alive and well.

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"""

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def checked_ok(self):

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

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self.last_checked_ok = datetime.datetime.utcnow()

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self.last_checker_status = 0

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self.bump_timeout()

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def bump_timeout(self, timeout=None):

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

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if timeout is None:

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timeout = self.timeout

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self.last_checked_ok = datetime.datetime.utcnow()

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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 = None

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

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self.disable_initiator_tag = (gobject.timeout_add

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(timedelta_to_milliseconds

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(timeout), self.disable))

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(int(timeout.total_seconds()

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* 1000), self.disable))

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

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def need_approval(self):

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If a checker already exists, leave it running and do

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nothing."""

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

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

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

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# client would inevitably timeout, since no checker would get

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

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

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

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# would inevitably timeout, since no checker would get a

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

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

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

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# should be.

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

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try:

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

657

except (AttributeError, OSError) as error:

658

if (isinstance(error, OSError)

659

and error.errno != errno.ECHILD):

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raise error

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except AttributeError:

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pass

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except OSError as error:

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if error.errno != errno.ECHILD:

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raise

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else:

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if pid:

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logger.warning("Checker was a zombie")

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self.current_checker_command)

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# Start a new checker if needed

668

685

if self.checker is None:

686

# Escape attributes for the shell

687

escaped_attrs = { attr:

688

re.escape(unicode(getattr(self,

689

attr)))

690

for attr in self.runtime_expansions }

669

691

try:

670

# In case checker_command has exactly one % operator

671

command = self.checker_command % self.host

672

except TypeError:

673

# Escape attributes for the shell

674

escaped_attrs = dict(

675

(attr,

676

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

677

errors=

678

'replace')))

679

for attr in

680

self.runtime_expansions)

681

682

try:

683

command = self.checker_command % escaped_attrs

684

except TypeError as error:

685

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

686

' %s', self.checker_command, error)

687

return True # Try again later

692

command = self.checker_command % escaped_attrs

693

except TypeError as error:

694

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

695

self.checker_command, exc_info=error)

696

return True # Try again later

688

697

self.current_checker_command = command

689

698

try:

690

699

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

693

702

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

694

703

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

695

704

# always replaced by /dev/null.)

705

# The exception is when not debugging but nevertheless

706

# running in the foreground; use the previously

707

# created wnull.

708

popen_args = {}

709

if (not self.server_settings["debug"]

710

and self.server_settings["foreground"]):

711

popen_args.update({"stdout": wnull,

712

"stderr": wnull })

696

713

self.checker = subprocess.Popen(command,

697

714

close_fds=True,

698

shell=True, cwd="/")

699

self.checker_callback_tag = (gobject.child_watch_add

700

(self.checker.pid,

701

self.checker_callback,

702

data=command))

703

# The checker may have completed before the gobject

704

# watch was added. Check for this.

715

shell=True, cwd="/",

716

**popen_args)

717

except OSError as error:

718

logger.error("Failed to start subprocess",

719

exc_info=error)

720

return True

721

self.checker_callback_tag = (gobject.child_watch_add

722

(self.checker.pid,

723

self.checker_callback,

724

data=command))

725

# The checker may have completed before the gobject

726

# watch was added. Check for this.

727

try:

705

728

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

706

if pid:

707

gobject.source_remove(self.checker_callback_tag)

708

self.checker_callback(pid, status, command)

709

729

except OSError as error:

710

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

711

error)

730

if error.errno == errno.ECHILD:

731

# This should never happen

732

logger.error("Child process vanished",

733

exc_info=error)

734

return True

735

raise

736

if pid:

737

gobject.source_remove(self.checker_callback_tag)

738

self.checker_callback(pid, status, command)

712

739

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

713

740

return True

714

741

721

748

return

722

749

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

723

750

try:

724

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

751

self.checker.terminate()

725

752

#time.sleep(0.5)

726

753

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

727

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

754

# self.checker.kill()

728

755

except OSError as error:

729

756

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

730

757

raise

747

774

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

748

775

if byte_arrays and signature != "ay":

749

776

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

750

" signature %r" % signature)

777

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

751

778

def decorator(func):

752

779

func._dbus_is_property = True

753

780

func._dbus_interface = dbus_interface

761

788

return decorator

762

789

763

790

791

def dbus_interface_annotations(dbus_interface):

792

"""Decorator for marking functions returning interface annotations

793

794

Usage:

795

796

@dbus_interface_annotations("org.example.Interface")

797

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

798

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

799

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

800

"false"}

801

"""

802

def decorator(func):

803

func._dbus_is_interface = True

804

func._dbus_interface = dbus_interface

805

func._dbus_name = dbus_interface

806

return func

807

return decorator

808

809

810

def dbus_annotations(annotations):

811

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

812

Usage:

813

814

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

815

access="r")

816

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

817

"org.freedesktop.DBus.Property."

818

"EmitsChangedSignal": "false"})

819

def Property_dbus_property(self):

820

return dbus.Boolean(False)

821

"""

822

def decorator(func):

823

func._dbus_annotations = annotations

824

return func

825

return decorator

826

827

764

828

class DBusPropertyException(dbus.exceptions.DBusException):

765

829

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

766

830

"""

767

def __unicode__(self):

768

return unicode(str(self))

769

831

pass

770

832

771

833

class DBusPropertyAccessException(DBusPropertyException):

772

834

"""A property's access permissions disallows an operation.

789

851

"""

790

852

791

853

@staticmethod

792

def _is_dbus_property(obj):

793

return getattr(obj, "_dbus_is_property", False)

854

def _is_dbus_thing(thing):

855

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

856

857

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

858

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

859

"""

860

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

861

False)

794

862

795

def _get_all_dbus_properties(self):

863

def _get_all_dbus_things(self, thing):

796

864

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

797

865

"""

798

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

866

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

867

name),

868

athing.__get__(self))

799

869

for cls in self.__class__.__mro__

800

for name, prop in

801

inspect.getmembers(cls, self._is_dbus_property))

870

for name, athing in

871

inspect.getmembers(cls,

872

self._is_dbus_thing(thing)))

802

873

803

874

def _get_dbus_property(self, interface_name, property_name):

804

875

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

806

877

"""

807

878

for cls in self.__class__.__mro__:

808

879

for name, value in (inspect.getmembers

809

(cls, self._is_dbus_property)):

880

(cls,

881

self._is_dbus_thing("property"))):

810

882

if (value._dbus_name == property_name

811

883

and value._dbus_interface == interface_name):

812

884

return value.__get__(self)

840

912

# The byte_arrays option is not supported yet on

841

913

# signatures other than "ay".

842

914

if prop._dbus_signature != "ay":

843

raise ValueError

844

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

845

for byte in value))

915

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

916

"'ay' signature {!r}"

917

.format(prop._dbus_signature))

918

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

919

for byte in value))

846

920

prop(value)

847

921

848

922

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

854

928

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

855

929

"""

856

930

properties = {}

857

for name, prop in self._get_all_dbus_properties():

931

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

858

932

if (interface_name

859

933

and interface_name != prop._dbus_interface):

860

934

# Interface non-empty but did not match

875

949

path_keyword='object_path',

876

950

connection_keyword='connection')

877

951

def Introspect(self, object_path, connection):

878

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

952

"""Overloading of standard D-Bus method.

953

954

Inserts property tags and interface annotation tags.

879

955

"""

880

956

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

881

957

connection)

888

964

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

889

965

return e

890

966

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

967

# Add property tags

891

968

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

892

969

for name, prop

893

in self._get_all_dbus_properties()

970

in self._get_all_dbus_things("property")

894

971

if prop._dbus_interface

895

972

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

896

973

if_tag.appendChild(tag)

974

# Add annotation tags

975

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

976

for tag in if_tag.getElementsByTagName(typ):

977

annots = dict()

978

for name, prop in (self.

979

_get_all_dbus_things(typ)):

980

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

981

and prop._dbus_interface

982

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

983

annots.update(getattr

984

(prop,

985

"_dbus_annotations",

986

{}))

987

for name, value in annots.items():

988

ann_tag = document.createElement(

989

"annotation")

990

ann_tag.setAttribute("name", name)

991

ann_tag.setAttribute("value", value)

992

tag.appendChild(ann_tag)

993

# Add interface annotation tags

994

for annotation, value in dict(

995

itertools.chain.from_iterable(

996

annotations().items()

997

for name, annotations in

998

self._get_all_dbus_things("interface")

999

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

1000

)).items():

1001

ann_tag = document.createElement("annotation")

1002

ann_tag.setAttribute("name", annotation)

1003

ann_tag.setAttribute("value", value)

1004

if_tag.appendChild(ann_tag)

897

1005

# Add the names to the return values for the

898

1006

# "org.freedesktop.DBus.Properties" methods

899

1007

if (if_tag.getAttribute("name")

914

1022

except (AttributeError, xml.dom.DOMException,

915

1023

xml.parsers.expat.ExpatError) as error:

916

1024

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

917

error)

1025

exc_info=error)

918

1026

return xmlstring

919

1027

920

1028

921

def datetime_to_dbus (dt, variant_level=0):

1029

def datetime_to_dbus(dt, variant_level=0):

922

1030

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

923

1031

if dt is None:

924

1032

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

926

1034

variant_level=variant_level)

927

1035

928

1036

929

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

930

.__metaclass__):

931

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

932

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

1037

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1038

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

1039

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

1040

interface names according to the "alt_interface_names" mapping.

1041

Usage:

1042

1043

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

1044

"net.example.AlternateInterface"})

1045

class SampleDBusObject(dbus.service.Object):

1046

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

1047

def SampleDBusMethod():

1048

pass

1049

1050

The above "SampleDBusMethod" on "SampleDBusObject" will be

1051

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

1052

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

1053

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

1054

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

1055

1056

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

1057

(from DBusObjectWithProperties) and interfaces (from the

1058

dbus_interface_annotations decorator).

933

1059

"""

934

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

935

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

936

# methods, signals, or properties in them

937

for base in (b for b in bases

938

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

939

# Go though all attributes of the base class

940

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

1060

def wrapper(cls):

1061

for orig_interface_name, alt_interface_name in (

1062

alt_interface_names.items()):

1063

attr = {}

1064

interface_names = set()

1065

# Go though all attributes of the class

1066

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

941

1067

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

942

1068

# with the wrong interface name

943

1069

if (not hasattr(attribute, "_dbus_interface")

944

1070

or not attribute._dbus_interface

945

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

1071

.startswith(orig_interface_name)):

946

1072

continue

947

1073

# Create an alternate D-Bus interface name based on

948

1074

# the current name

949

1075

alt_interface = (attribute._dbus_interface

950

.replace("se.recompile.Mandos",

951

"se.bsnet.fukt.Mandos"))

1076

.replace(orig_interface_name,

1077

alt_interface_name))

1078

interface_names.add(alt_interface)

952

1079

# Is this a D-Bus signal?

953

1080

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

954

# Extract the original non-method function by

955

# black magic

1081

# Extract the original non-method undecorated

1082

# function by black magic

956

1083

nonmethod_func = (dict(

957

1084

zip(attribute.func_code.co_freevars,

958

1085

attribute.__closure__))["func"]

969

1096

nonmethod_func.func_name,

970

1097

nonmethod_func.func_defaults,

971

1098

nonmethod_func.func_closure)))

1099

# Copy annotations, if any

1100

try:

1101

new_function._dbus_annotations = (

1102

dict(attribute._dbus_annotations))

1103

except AttributeError:

1104

pass

972

1105

# Define a creator of a function to call both the

973

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

974

# signals gets sent when the function is called

1106

# original and alternate functions, so both the

1107

# original and alternate signals gets sent when

1108

# the function is called

975

1109

def fixscope(func1, func2):

976

1110

"""This function is a scope container to pass

977

1111

func1 and func2 to the "call_both" function

984

1118

return call_both

985

1119

# Create the "call_both" function and add it to

986

1120

# the class

987

attr[attrname] = fixscope(attribute,

988

new_function)

1121

attr[attrname] = fixscope(attribute, new_function)

989

1122

# Is this a D-Bus method?

990

1123

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

991

1124

# Create a new, but exactly alike, function

1002

1135

attribute.func_name,

1003

1136

attribute.func_defaults,

1004

1137

attribute.func_closure)))

1138

# Copy annotations, if any

1139

try:

1140

attr[attrname]._dbus_annotations = (

1141

dict(attribute._dbus_annotations))

1142

except AttributeError:

1143

pass

1005

1144

# Is this a D-Bus property?

1006

1145

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

1007

1146

# Create a new, but exactly alike, function

1021

1160

attribute.func_name,

1022

1161

attribute.func_defaults,

1023

1162

attribute.func_closure)))

1024

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

1025

1026

1163

# Copy annotations, if any

1164

try:

1165

attr[attrname]._dbus_annotations = (

1166

dict(attribute._dbus_annotations))

1167

except AttributeError:

1168

pass

1169

# Is this a D-Bus interface?

1170

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

1171

# Create a new, but exactly alike, function

1172

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

1173

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

1174

# to the class.

1175

attr[attrname] = (dbus_interface_annotations

1176

(alt_interface)

1177

(types.FunctionType

1178

(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1183

if deprecate:

1184

# Deprecate all alternate interfaces

1185

iname="_AlternateDBusNames_interface_annotation{}"

1186

for interface_name in interface_names:

1187

@dbus_interface_annotations(interface_name)

1188

def func(self):

1189

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

1190

"true" }

1191

# Find an unused name

1192

for aname in (iname.format(i)

1193

for i in itertools.count()):

1194

if aname not in attr:

1195

attr[aname] = func

1196

break

1197

if interface_names:

1198

# Replace the class with a new subclass of it with

1199

# methods, signals, etc. as created above.

1200

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

1201

(cls,), attr)

1202

return cls

1203

return wrapper

1204

1205

1206

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

1207

"se.bsnet.fukt.Mandos"})

1027

1208

class ClientDBus(Client, DBusObjectWithProperties):

1028

1209

"""A Client class using D-Bus

1029

1210

1040

1221

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

1041

1222

self.bus = bus

1042

1223

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

1043

self._approvals_pending = 0

1044

1045

self._approvals_pending = 0

1046

1224

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

1047

1225

# the D-Bus

1048

1226

client_object_name = unicode(self.name).translate(

1052

1230

("/clients/" + client_object_name))

1053

1231

DBusObjectWithProperties.__init__(self, self.bus,

1054

1232

self.dbus_object_path)

1055

1233

1056

1234

def notifychangeproperty(transform_func,

1057

1235

dbus_name, type_func=lambda x: x,

1058

1236

variant_level=1):

1066

1244

to the D-Bus. Default: no transform

1067

1245

variant_level: D-Bus variant level. Default: 1

1068

1246

"""

1069

attrname = "_{0}".format(dbus_name)

1247

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

1070

1248

def setter(self, value):

1071

1249

if hasattr(self, "dbus_object_path"):

1072

1250

if (not hasattr(self, attrname) or

1081

1259

1082

1260

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

1083

1261

1084

1085

1262

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1086

1263

approvals_pending = notifychangeproperty(dbus.Boolean,

1087

1264

"ApprovalPending",

1094

1271

checker is not None)

1095

1272

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1096

1273

"LastCheckedOK")

1274

last_checker_status = notifychangeproperty(dbus.Int16,

1275

"LastCheckerStatus")

1097

1276

last_approval_request = notifychangeproperty(

1098

1277

datetime_to_dbus, "LastApprovalRequest")

1099

1278

approved_by_default = notifychangeproperty(dbus.Boolean,

1101

1280

approval_delay = notifychangeproperty(dbus.UInt64,

1102

1281

"ApprovalDelay",

1103

1282

type_func =

1104

timedelta_to_milliseconds)

1283

lambda td: td.total_seconds()

1284

* 1000)

1105

1285

approval_duration = notifychangeproperty(

1106

1286

dbus.UInt64, "ApprovalDuration",

1107

type_func = timedelta_to_milliseconds)

1287

type_func = lambda td: td.total_seconds() * 1000)

1108

1288

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

1109

1289

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

1110

type_func =

1111

timedelta_to_milliseconds)

1290

type_func = lambda td:

1291

td.total_seconds() * 1000)

1112

1292

extended_timeout = notifychangeproperty(

1113

1293

dbus.UInt64, "ExtendedTimeout",

1114

type_func = timedelta_to_milliseconds)

1294

type_func = lambda td: td.total_seconds() * 1000)

1115

1295

interval = notifychangeproperty(dbus.UInt64,

1116

1296

"Interval",

1117

1297

type_func =

1118

timedelta_to_milliseconds)

1298

lambda td: td.total_seconds()

1299

* 1000)

1119

1300

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

1120

1301

1121

1302

del notifychangeproperty

1149

1330

*args, **kwargs)

1150

1331

1151

1332

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

1152

old_checker = self.checker

1153

if self.checker is not None:

1154

old_checker_pid = self.checker.pid

1155

else:

1156

old_checker_pid = None

1333

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

1157

1334

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

1158

1335

# Only if new checker process was started

1159

1336

if (self.checker is not None

1167

1344

return False

1168

1345

1169

1346

def approve(self, value=True):

1170

self.send_changedstate()

1171

1347

self.approved = value

1172

gobject.timeout_add(timedelta_to_milliseconds

1173

(self.approval_duration),

1174

self._reset_approved)

1175

1348

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

1349

* 1000), self._reset_approved)

1350

self.send_changedstate()

1176

1351

1177

1352

## D-Bus methods, signals & properties

1178

1353

_interface = "se.recompile.Mandos.Client"

1179

1354

1355

## Interfaces

1356

1357

@dbus_interface_annotations(_interface)

1358

def _foo(self):

1359

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

1360

"false"}

1361

1180

1362

## Signals

1181

1363

1182

1364

# CheckerCompleted - signal

1218

1400

"D-Bus signal"

1219

1401

return self.need_approval()

1220

1402

1221

# NeRwequest - signal

1222

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

1223

def NewRequest(self, ip):

1224

"""D-Bus signal

1225

Is sent after a client request a password.

1226

"""

1227

pass

1228

1229

1403

## Methods

1230

1404

1231

1405

# Approve - method

1281

1455

access="readwrite")

1282

1456

def ApprovalDelay_dbus_property(self, value=None):

1283

1457

if value is None: # get

1284

return dbus.UInt64(self.approval_delay_milliseconds())

1458

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

1459

* 1000)

1285

1460

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

1286

1461

1287

1462

# ApprovalDuration - property

1289

1464

access="readwrite")

1290

1465

def ApprovalDuration_dbus_property(self, value=None):

1291

1466

if value is None: # get

1292

return dbus.UInt64(timedelta_to_milliseconds(

1293

self.approval_duration))

1467

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

1468

* 1000)

1294

1469

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

1295

1470

1296

1471

# Name - property

1341

1516

return

1342

1517

return datetime_to_dbus(self.last_checked_ok)

1343

1518

1519

# LastCheckerStatus - property

1520

@dbus_service_property(_interface, signature="n",

1521

access="read")

1522

def LastCheckerStatus_dbus_property(self):

1523

return dbus.Int16(self.last_checker_status)

1524

1344

1525

# Expires - property

1345

1526

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

1346

1527

def Expires_dbus_property(self):

1356

1537

access="readwrite")

1357

1538

def Timeout_dbus_property(self, value=None):

1358

1539

if value is None: # get

1359

return dbus.UInt64(self.timeout_milliseconds())

1540

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

1541

old_timeout = self.timeout

1360

1542

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

1361

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

1362

return

1363

# Reschedule timeout

1364

gobject.source_remove(self.disable_initiator_tag)

1365

self.disable_initiator_tag = None

1366

self.expires = None

1367

time_to_die = timedelta_to_milliseconds((self

1368

.last_checked_ok

1369

+ self.timeout)

1370

- datetime.datetime

1371

.utcnow())

1372

if time_to_die <= 0:

1373

# The timeout has passed

1374

self.disable()

1375

else:

1376

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

1377

+ datetime.timedelta(milliseconds =

1378

time_to_die))

1379

self.disable_initiator_tag = (gobject.timeout_add

1380

(time_to_die, self.disable))

1543

# Reschedule disabling

1544

if self.enabled:

1545

now = datetime.datetime.utcnow()

1546

self.expires += self.timeout - old_timeout

1547

if self.expires <= now:

1548

# The timeout has passed

1549

self.disable()

1550

else:

1551

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

1552

is None):

1553

return

1554

gobject.source_remove(self.disable_initiator_tag)

1555

self.disable_initiator_tag = (

1556

gobject.timeout_add(

1557

int((self.expires - now).total_seconds()

1558

* 1000), self.disable))

1381

1559

1382

1560

# ExtendedTimeout - property

1383

1561

@dbus_service_property(_interface, signature="t",

1384

1562

access="readwrite")

1385

1563

def ExtendedTimeout_dbus_property(self, value=None):

1386

1564

if value is None: # get

1387

return dbus.UInt64(self.extended_timeout_milliseconds())

1565

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

1566

* 1000)

1388

1567

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

1389

1568

1390

1569

# Interval - property

1392

1571

access="readwrite")

1393

1572

def Interval_dbus_property(self, value=None):

1394

1573

if value is None: # get

1395

return dbus.UInt64(self.interval_milliseconds())

1574

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

1396

1575

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

1397

1576

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

1398

1577

return

1431

1610

@dbus_service_property(_interface, signature="ay",

1432

1611

access="write", byte_arrays=True)

1433

1612

def Secret_dbus_property(self, value):

1434

self.secret = str(value)

1613

self.secret = bytes(value)

1435

1614

1436

1615

del _interface

1437

1616

1462

1641

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

1463

1642

1464

1643

1465

class ClientDBusTransitional(ClientDBus):

1466

__metaclass__ = AlternateDBusNamesMetaclass

1467

1468

1469

1644

class ClientHandler(socketserver.BaseRequestHandler, object):

1470

1645

"""A class to handle client connections.

1471

1646

1507

1682

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

1508

1683

try:

1509

1684

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

1510

raise RuntimeError

1685

raise RuntimeError(line)

1511

1686

except (ValueError, IndexError, RuntimeError) as error:

1512

1687

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

1513

1688

return

1539

1714

except KeyError:

1540

1715

return

1541

1716

1542

if self.server.use_dbus:

1543

# Emit D-Bus signal

1544

client.NewRequest(str(self.client_address))

1545

1546

1717

if client.approval_delay:

1547

1718

delay = client.approval_delay

1548

1719

client.approvals_pending += 1

1566

1737

if self.server.use_dbus:

1567

1738

# Emit D-Bus signal

1568

1739

client.NeedApproval(

1569

client.approval_delay_milliseconds(),

1570

client.approved_by_default)

1740

client.approval_delay.total_seconds()

1741

* 1000, client.approved_by_default)

1571

1742

else:

1572

1743

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

1573

1744

client.name)

1579

1750

#wait until timeout or approved

1580

1751

time = datetime.datetime.now()

1581

1752

client.changedstate.acquire()

1582

(client.changedstate.wait

1583

(float(client.timedelta_to_milliseconds(delay)

1584

/ 1000)))

1753

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

1585

1754

client.changedstate.release()

1586

1755

time2 = datetime.datetime.now()

1587

1756

if (time2 - time) >= delay:

1603

1772

try:

1604

1773

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

1605

1774

except gnutls.errors.GNUTLSError as error:

1606

logger.warning("gnutls send failed")

1775

logger.warning("gnutls send failed",

1776

exc_info=error)

1607

1777

return

1608

1778

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

1609

1779

sent, len(client.secret)

1612

1782

1613

1783

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

1614

1784

# bump the timeout using extended_timeout

1615

client.checked_ok(client.extended_timeout)

1785

client.bump_timeout(client.extended_timeout)

1616

1786

if self.server.use_dbus:

1617

1787

# Emit D-Bus signal

1618

1788

client.GotSecret()

1623

1793

try:

1624

1794

session.bye()

1625

1795

except gnutls.errors.GNUTLSError as error:

1626

logger.warning("GnuTLS bye failed")

1796

logger.warning("GnuTLS bye failed",

1797

exc_info=error)

1627

1798

1628

1799

@staticmethod

1629

1800

def peer_certificate(session):

1701

1872

def process_request(self, request, address):

1702

1873

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

1703

1874

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

1704

args = (request,

1705

address))

1875

args = (request, address))

1706

1876

proc.start()

1707

1877

return proc

1708

1878

1723

1893

1724

1894

def add_pipe(self, parent_pipe, proc):

1725

1895

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

1726

raise NotImplementedError

1896

raise NotImplementedError()

1727

1897

1728

1898

1729

1899

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1736

1906

use_ipv6: Boolean; to use IPv6 or not

1737

1907

"""

1738

1908

def __init__(self, server_address, RequestHandlerClass,

1739

interface=None, use_ipv6=True):

1909

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

1910

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

1911

creating a new one with socket.socket().

1912

"""

1740

1913

self.interface = interface

1741

1914

if use_ipv6:

1742

1915

self.address_family = socket.AF_INET6

1916

if socketfd is not None:

1917

# Save the file descriptor

1918

self.socketfd = socketfd

1919

# Save the original socket.socket() function

1920

self.socket_socket = socket.socket

1921

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

1922

#

1923

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

1924

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

1925

# patching socket.socket.)

1926

#

1927

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

1928

@functools.wraps(socket.socket)

1929

def socket_wrapper(*args, **kwargs):

1930

# Restore original function so subsequent calls are

1931

# not affected.

1932

socket.socket = self.socket_socket

1933

del self.socket_socket

1934

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

1935

# saved file descriptor.

1936

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

1937

# Replace socket.socket() function with wrapper

1938

socket.socket = socket_wrapper

1939

# The socketserver.TCPServer.__init__ will call

1940

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

1941

# socket_wrapper(), if socketfd was set.

1743

1942

socketserver.TCPServer.__init__(self, server_address,

1744

1943

RequestHandlerClass)

1944

1745

1945

def server_bind(self):

1746

1946

"""This overrides the normal server_bind() function

1747

1947

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

1755

1955

try:

1756

1956

self.socket.setsockopt(socket.SOL_SOCKET,

1757

1957

SO_BINDTODEVICE,

1758

str(self.interface

1759

+ '\0'))

1958

(self.interface + "\0")

1959

.encode("utf-8"))

1760

1960

except socket.error as error:

1761

if error[0] == errno.EPERM:

1762

logger.error("No permission to"

1763

" bind to interface %s",

1764

self.interface)

1765

elif error[0] == errno.ENOPROTOOPT:

1961

if error.errno == errno.EPERM:

1962

logger.error("No permission to bind to"

1963

" interface %s", self.interface)

1964

elif error.errno == errno.ENOPROTOOPT:

1766

1965

logger.error("SO_BINDTODEVICE not available;"

1767

1966

" cannot bind to interface %s",

1768

1967

self.interface)

1968

elif error.errno == errno.ENODEV:

1969

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

1970

" cannot bind", self.interface)

1769

1971

else:

1770

1972

raise

1771

1973

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

1774

1976

if self.address_family == socket.AF_INET6:

1775

1977

any_address = "::" # in6addr_any

1776

1978

else:

1777

any_address = socket.INADDR_ANY

1979

any_address = "0.0.0.0" # INADDR_ANY

1778

1980

self.server_address = (any_address,

1779

1981

self.server_address[1])

1780

1982

elif not self.server_address[1]:

1801

2003

"""

1802

2004

def __init__(self, server_address, RequestHandlerClass,

1803

2005

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

1804

gnutls_priority=None, use_dbus=True):

2006

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

1805

2007

self.enabled = False

1806

2008

self.clients = clients

1807

2009

if self.clients is None:

1811

2013

IPv6_TCPServer.__init__(self, server_address,

1812

2014

RequestHandlerClass,

1813

2015

interface = interface,

1814

use_ipv6 = use_ipv6)

2016

use_ipv6 = use_ipv6,

2017

socketfd = socketfd)

1815

2018

def server_activate(self):

1816

2019

if self.enabled:

1817

2020

return socketserver.TCPServer.server_activate(self)

1830

2033

1831

2034

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

1832

2035

proc = None, client_object=None):

1833

condition_names = {

1834

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

1835

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

1836

# blocking).

1837

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

1838

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

1839

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

1840

# broken, usually for pipes and

1841

# sockets).

1842

}

1843

conditions_string = ' | '.join(name

1844

for cond, name in

1845

condition_names.iteritems()

1846

if cond & condition)

1847

2036

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

1848

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

2037

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

1849

2038

# Wait for other process to exit

1850

2039

proc.join()

1851

2040

return False

1909

2098

return True

1910

2099

1911

2100

2101

def rfc3339_duration_to_delta(duration):

2102

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

2103

2104

>>> rfc3339_duration_to_delta("P7D")

2105

datetime.timedelta(7)

2106

>>> rfc3339_duration_to_delta("PT60S")

2107

datetime.timedelta(0, 60)

2108

>>> rfc3339_duration_to_delta("PT60M")

2109

datetime.timedelta(0, 3600)

2110

>>> rfc3339_duration_to_delta("PT24H")

2111

datetime.timedelta(1)

2112

>>> rfc3339_duration_to_delta("P1W")

2113

datetime.timedelta(7)

2114

>>> rfc3339_duration_to_delta("PT5M30S")

2115

datetime.timedelta(0, 330)

2116

>>> rfc3339_duration_to_delta("P1DT3M20S")

2117

datetime.timedelta(1, 200)

2118

"""

2119

2120

# Parsing an RFC 3339 duration with regular expressions is not

2121

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

2122

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

2123

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

2124

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

2125

# avoid excessive use of external libraries.

2126

2127

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

2128

Token = collections.namedtuple("Token",

2129

("regexp", # To match token; if

2130

# "value" is not None,

2131

# must have a "group"

2132

# containing digits

2133

"value", # datetime.timedelta or

2134

# None

2135

"followers")) # Tokens valid after

2136

# this token

2137

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

2138

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

2139

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

2140

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

2141

datetime.timedelta(seconds=1),

2142

frozenset((token_end,)))

2143

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

2144

datetime.timedelta(minutes=1),

2145

frozenset((token_second, token_end)))

2146

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

2147

datetime.timedelta(hours=1),

2148

frozenset((token_minute, token_end)))

2149

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

2150

None,

2151

frozenset((token_hour, token_minute,

2152

token_second)))

2153

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

2154

datetime.timedelta(days=1),

2155

frozenset((token_time, token_end)))

2156

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

2157

datetime.timedelta(weeks=4),

2158

frozenset((token_day, token_end)))

2159

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

2160

datetime.timedelta(weeks=52),

2161

frozenset((token_month, token_end)))

2162

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

2163

datetime.timedelta(weeks=1),

2164

frozenset((token_end,)))

2165

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

2166

frozenset((token_year, token_month,

2167

token_day, token_time,

2168

token_week)))

2169

# Define starting values

2170

value = datetime.timedelta() # Value so far

2171

found_token = None

2172

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

2173

s = duration # String left to parse

2174

# Loop until end token is found

2175

while found_token is not token_end:

2176

# Search for any currently valid tokens

2177

for token in followers:

2178

match = token.regexp.match(s)

2179

if match is not None:

2180

# Token found

2181

if token.value is not None:

2182

# Value found, parse digits

2183

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

2184

# Add to value so far

2185

value += factor * token.value

2186

# Strip token from string

2187

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

2188

# Go to found token

2189

found_token = token

2190

# Set valid next tokens

2191

followers = found_token.followers

2192

break

2193

else:

2194

# No currently valid tokens were found

2195

raise ValueError("Invalid RFC 3339 duration")

2196

# End token found

2197

return value

2198

2199

1912

2200

def string_to_delta(interval):

1913

2201

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

1914

2202

1925

2213

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

1926

2214

datetime.timedelta(0, 330)

1927

2215

"""

2216

2217

try:

2218

return rfc3339_duration_to_delta(interval)

2219

except ValueError:

2220

pass

2221

1928

2222

timevalue = datetime.timedelta(0)

1929

2223

for s in interval.split():

1930

2224

try:

1931

suffix = unicode(s[-1])

2225

suffix = s[-1]

1932

2226

value = int(s[:-1])

1933

2227

if suffix == "d":

1934

2228

delta = datetime.timedelta(value)

1941

2235

elif suffix == "w":

1942

2236

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

1943

2237

else:

1944

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

1945

except (ValueError, IndexError) as e:

2238

raise ValueError("Unknown suffix {!r}"

2239

.format(suffix))

2240

except IndexError as e:

1946

2241

raise ValueError(*(e.args))

1947

2242

timevalue += delta

1948

2243

return timevalue

1961

2256

sys.exit()

1962

2257

if not noclose:

1963

2258

# Close all standard open file descriptors

1964

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

2259

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

1965

2260

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

1966

raise OSError(errno.ENODEV,

1967

"%s not a character device"

1968

% os.path.devnull)

2261

raise OSError(errno.ENODEV, "{} not a character device"

2262

.format(os.devnull))

1969

2263

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

1970

2264

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

1971

2265

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

1980

2274

1981

2275

parser = argparse.ArgumentParser()

1982

2276

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

1983

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

2277

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

1984

2278

help="show version number and exit")

1985

2279

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

1986

2280

help="Bind to interface IF")

1992

2286

help="Run self-test")

1993

2287

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

1994

2288

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

1995

" to terminal")

2289

" to terminal", default=None)

1996

2290

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

1997

2291

help="Debug level for stdout output")

1998

2292

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

2005

2299

" files")

2006

2300

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

2007

2301

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

2008

" system bus interface")

2302

" system bus interface", default=None)

2009

2303

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

2010

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

2304

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

2305

default=None)

2011

2306

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

2012

2307

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

2013

" state")

2308

" state", default=None)

2309

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

2310

help="Specify a file descriptor to a network"

2311

" socket to use instead of creating one")

2014

2312

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

2015

2313

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

2314

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

2315

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

2316

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

2317

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

2318

default=None)

2016

2319

2017

2320

options = parser.parse_args()

2018

2321

2019

2322

if options.check:

2020

2323

import doctest

2021

doctest.testmod()

2022

sys.exit()

2324

fail_count, test_count = doctest.testmod()

2325

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

2023

2326

2024

2327

# Default values for config file for server-global settings

2025

2328

server_defaults = { "interface": "",

2027

2330

"port": "",

2028

2331

"debug": "False",

2029

2332

"priority":

2030

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

2333

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

2031

2334

"servicename": "Mandos",

2032

2335

"use_dbus": "True",

2033

2336

"use_ipv6": "True",

2034

2337

"debuglevel": "",

2035

2338

"restore": "True",

2036

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

2339

"socket": "",

2340

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

2341

"foreground": "False",

2342

"zeroconf": "True",

2037

2343

}

2038

2344

2039

2345

# Parse config file for server-global settings

2044

2350

# Convert the SafeConfigParser object to a dict

2045

2351

server_settings = server_config.defaults()

2046

2352

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

2047

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

2353

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

2048

2354

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

2049

2355

option)

2050

2356

if server_settings["port"]:

2051

2357

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

2052

2358

"port")

2359

if server_settings["socket"]:

2360

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

2361

"socket")

2362

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

2363

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

2364

# happen with a supplied network socket.

2365

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

2366

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

2367

["socket"])

2053

2368

del server_config

2054

2369

2055

2370

# Override the settings from the config file with command line

2057

2372

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

2058

2373

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

2059

2374

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

2060

"statedir"):

2375

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

2061

2376

value = getattr(options, option)

2062

2377

if value is not None:

2063

2378

server_settings[option] = value

2064

2379

del options

2065

2380

# Force all strings to be unicode

2066

2381

for option in server_settings.keys():

2067

if type(server_settings[option]) is str:

2068

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

2382

if isinstance(server_settings[option], bytes):

2383

server_settings[option] = (server_settings[option]

2384

.decode("utf-8"))

2385

# Force all boolean options to be boolean

2386

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

2387

"foreground", "zeroconf"):

2388

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

2389

# Debug implies foreground

2390

if server_settings["debug"]:

2391

server_settings["foreground"] = True

2069

2392

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

2070

2393

2071

2394

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

2072

2395

2396

if (not server_settings["zeroconf"] and

2397

not (server_settings["port"]

2398

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

2399

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

2400

" Zeroconf")

2401

2073

2402

# For convenience

2074

2403

debug = server_settings["debug"]

2075

2404

debuglevel = server_settings["debuglevel"]

2077

2406

use_ipv6 = server_settings["use_ipv6"]

2078

2407

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

2079

2408

stored_state_file)

2409

foreground = server_settings["foreground"]

2410

zeroconf = server_settings["zeroconf"]

2080

2411

2081

2412

if debug:

2082

2413

initlogger(debug, logging.DEBUG)

2089

2420

2090

2421

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

2091

2422

syslogger.setFormatter(logging.Formatter

2092

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

2093

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

2094

% server_settings["servicename"]))

2423

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

2424

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

2425

.format(server_settings

2426

["servicename"])))

2095

2427

2096

2428

# Parse config file with clients

2097

client_config = configparser.SafeConfigParser(Client.client_defaults)

2429

client_config = configparser.SafeConfigParser(Client

2430

.client_defaults)

2098

2431

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

2099

2432

"clients.conf"))

2100

2433

2101

2434

global mandos_dbus_service

2102

2435

mandos_dbus_service = None

2103

2436

2437

socketfd = None

2438

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

2439

socketfd = server_settings["socket"]

2104

2440

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

2105

2441

server_settings["port"]),

2106

2442

ClientHandler,

2109

2445

use_ipv6=use_ipv6,

2110

2446

gnutls_priority=

2111

2447

server_settings["priority"],

2112

use_dbus=use_dbus)

2113

if not debug:

2114

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

2448

use_dbus=use_dbus,

2449

socketfd=socketfd)

2450

if not foreground:

2451

pidfilename = "/run/mandos.pid"

2452

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

2453

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

2454

pidfile = None

2115

2455

try:

2116

2456

pidfile = open(pidfilename, "w")

2117

except IOError:

2118

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

2457

except IOError as e:

2458

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

2459

exc_info=e)

2119

2460

2120

try:

2121

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

2122

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

2123

except KeyError:

2461

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

2124

2462

try:

2125

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

2126

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

2463

uid = pwd.getpwnam(name).pw_uid

2464

gid = pwd.getpwnam(name).pw_gid

2465

break

2127

2466

except KeyError:

2128

try:

2129

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

2130

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

2131

except KeyError:

2132

uid = 65534

2133

gid = 65534

2467

continue

2468

else:

2469

uid = 65534

2470

gid = 65534

2134

2471

try:

2135

2472

os.setgid(gid)

2136

2473

os.setuid(uid)

2137

2474

except OSError as error:

2138

if error[0] != errno.EPERM:

2139

raise error

2475

if error.errno != errno.EPERM:

2476

raise

2140

2477

2141

2478

if debug:

2142

2479

# Enable all possible GnuTLS debugging

2153

2490

.gnutls_global_set_log_function(debug_gnutls))

2154

2491

2155

2492

# Redirect stdin so all checkers get /dev/null

2156

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

2493

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

2157

2494

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

2158

2495

if null > 2:

2159

2496

os.close(null)

2160

2497

2161

2498

# Need to fork before connecting to D-Bus

2162

if not debug:

2499

if not foreground:

2163

2500

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

2164

2501

daemon()

2165

2502

2503

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

2504

# need to inform gobject that threads will be used.

2166

2505

gobject.threads_init()

2167

2506

2168

2507

global main_loop

2169

2508

# From the Avahi example code

2170

DBusGMainLoop(set_as_default=True )

2509

DBusGMainLoop(set_as_default=True)

2171

2510

main_loop = gobject.MainLoop()

2172

2511

bus = dbus.SystemBus()

2173

2512

# End of Avahi example code

2179

2518

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

2180

2519

do_not_queue=True))

2181

2520

except dbus.exceptions.NameExistsException as e:

2182

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

2521

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

2183

2522

use_dbus = False

2184

2523

server_settings["use_dbus"] = False

2185

2524

tcp_server.use_dbus = False

2186

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2187

service = AvahiServiceToSyslog(name =

2188

server_settings["servicename"],

2189

servicetype = "_mandos._tcp",

2190

protocol = protocol, bus = bus)

2191

if server_settings["interface"]:

2192

service.interface = (if_nametoindex

2193

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

2525

if zeroconf:

2526

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2527

service = AvahiServiceToSyslog(name =

2528

server_settings["servicename"],

2529

servicetype = "_mandos._tcp",

2530

protocol = protocol, bus = bus)

2531

if server_settings["interface"]:

2532

service.interface = (if_nametoindex

2533

(server_settings["interface"]

2534

.encode("utf-8")))

2194

2535

2195

2536

global multiprocessing_manager

2196

2537

multiprocessing_manager = multiprocessing.Manager()

2197

2538

2198

2539

client_class = Client

2199

2540

if use_dbus:

2200

client_class = functools.partial(ClientDBusTransitional,

2201

bus = bus)

2541

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

2202

2542

2203

2543

client_settings = Client.config_parser(client_config)

2204

2544

old_client_settings = {}

2205

2545

clients_data = {}

2206

2546

2547

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

2548

global wnull

2549

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

2550

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

2551

# mode

2552

if debug or not foreground:

2553

wnull.close()

2554

2207

2555

# Get client data and settings from last running state.

2208

2556

if server_settings["restore"]:

2209

2557

try:

2212

2560

(stored_state))

2213

2561

os.remove(stored_state_path)

2214

2562

except IOError as e:

2215

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

2216

.format(e))

2217

if e.errno != errno.ENOENT:

2563

if e.errno == errno.ENOENT:

2564

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

2565

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

2566

else:

2567

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

2568

exc_info=e)

2218

2569

raise

2219

2570

except EOFError as e:

2220

2571

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

2221

"EOFError: {0}".format(e))

2572

"EOFError:", exc_info=e)

2222

2573

2223

2574

with PGPEngine() as pgp:

2224

for client_name, client in clients_data.iteritems():

2575

for client_name, client in clients_data.items():

2576

# Skip removed clients

2577

if client_name not in client_settings:

2578

continue

2579

2225

2580

# Decide which value to use after restoring saved state.

2226

2581

# We have three different values: Old config file,

2227

2582

# new config file, and saved state.

2241

2596

2242

2597

# Clients who has passed its expire date can still be

2243

2598

# enabled if its last checker was successful. Clients

2244

# whose checker failed before we stored its state is

2245

# assumed to have failed all checkers during downtime.

2599

# whose checker succeeded before we stored its state is

2600

# assumed to have successfully run all checkers during

2601

# downtime.

2246

2602

if client["enabled"]:

2247

2603

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

2248

2604

if not client["last_checked_ok"]:

2249

2605

logger.warning(

2250

"disabling client {0} - Client never "

2251

"performed a successfull checker"

2252

.format(client["name"]))

2606

"disabling client {} - Client never "

2607

"performed a successful checker"

2608

.format(client_name))

2253

2609

client["enabled"] = False

2254

2610

elif client["last_checker_status"] != 0:

2255

2611

logger.warning(

2256

"disabling client {0} - Client "

2257

"last checker failed with error code {1}"

2258

.format(client["name"],

2612

"disabling client {} - Client last"

2613

" checker failed with error code {}"

2614

.format(client_name,

2259

2615

client["last_checker_status"]))

2260

2616

client["enabled"] = False

2261

2617

else:

2262

2618

client["expires"] = (datetime.datetime

2263

2619

.utcnow()

2264

2620

+ client["timeout"])

2265

2621

logger.debug("Last checker succeeded,"

2622

" keeping {} enabled"

2623

.format(client_name))

2266

2624

try:

2267

2625

client["secret"] = (

2268

2626

pgp.decrypt(client["encrypted_secret"],

2270

2628

["secret"]))

2271

2629

except PGPError:

2272

2630

# If decryption fails, we use secret from new settings

2273

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

2631

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

2274

2632

.format(client_name))

2275

2633

client["secret"] = (

2276

2634

client_settings[client_name]["secret"])

2277

2278

2635

2279

2636

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

2280

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

2637

for client_name in (set(old_client_settings)

2638

- set(client_settings)):

2281

2639

del clients_data[client_name]

2282

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

2640

for client_name in (set(client_settings)

2641

- set(old_client_settings)):

2283

2642

clients_data[client_name] = client_settings[client_name]

2284

2285

# Create clients all clients

2286

for client_name, client in clients_data.iteritems():

2643

2644

# Create all client objects

2645

for client_name, client in clients_data.items():

2287

2646

tcp_server.clients[client_name] = client_class(

2288

name = client_name, settings = client)

2647

name = client_name, settings = client,

2648

server_settings = server_settings)

2289

2649

2290

2650

if not tcp_server.clients:

2291

2651

logger.warning("No clients defined")

2292

2293

if not debug:

2294

try:

2295

with pidfile:

2296

pid = os.getpid()

2297

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

2298

del pidfile

2299

except IOError:

2300

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

2301

pidfilename, pid)

2302

except NameError:

2303

# "pidfile" was never created

2304

pass

2652

2653

if not foreground:

2654

if pidfile is not None:

2655

try:

2656

with pidfile:

2657

pid = os.getpid()

2658

pidfile.write("{}\n".format(pid).encode("utf-8"))

2659

except IOError:

2660

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

2661

pidfilename, pid)

2662

del pidfile

2305

2663

del pidfilename

2306

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

2307

2664

2308

2665

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

2309

2666

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

2310

2667

2311

2668

if use_dbus:

2312

class MandosDBusService(dbus.service.Object):

2669

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

2670

"se.bsnet.fukt.Mandos"})

2671

class MandosDBusService(DBusObjectWithProperties):

2313

2672

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

2314

2673

def __init__(self):

2315

2674

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

2316

2675

_interface = "se.recompile.Mandos"

2317

2676

2677

@dbus_interface_annotations(_interface)

2678

def _foo(self):

2679

return { "org.freedesktop.DBus.Property"

2680

".EmitsChangedSignal":

2681

"false"}

2682

2318

2683

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

2319

2684

def ClientAdded(self, objpath):

2320

2685

"D-Bus signal"

2362

2727

2363

2728

del _interface

2364

2729

2365

class MandosDBusServiceTransitional(MandosDBusService):

2366

__metaclass__ = AlternateDBusNamesMetaclass

2367

mandos_dbus_service = MandosDBusServiceTransitional()

2730

mandos_dbus_service = MandosDBusService()

2368

2731

2369

2732

def cleanup():

2370

2733

"Cleanup function; run on exit"

2371

service.cleanup()

2734

if zeroconf:

2735

service.cleanup()

2372

2736

2373

2737

multiprocessing.active_children()

2738

wnull.close()

2374

2739

if not (tcp_server.clients or client_settings):

2375

2740

return

2376

2741

2387

2752

2388

2753

# A list of attributes that can not be pickled

2389

2754

# + secret.

2390

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

2391

"checker"))

2755

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

2756

"checker", "server_settings" }

2392

2757

for name, typ in (inspect.getmembers

2393

2758

(dbus.service.Object)):

2394

2759

exclude.add(name)

2403

2768

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

2404

2769

2405

2770

try:

2406

tempfd, tempname = tempfile.mkstemp(suffix=".pickle",

2407

prefix="clients-",

2408

dir=os.path.dirname

2409

(stored_state_path))

2410

with os.fdopen(tempfd, "wb") as stored_state:

2771

with (tempfile.NamedTemporaryFile

2772

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

2773

dir=os.path.dirname(stored_state_path),

2774

delete=False)) as stored_state:

2411

2775

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

2776

tempname=stored_state.name

2412

2777

os.rename(tempname, stored_state_path)

2413

2778

except (IOError, OSError) as e:

2414

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

2415

.format(e))

2416

2779

if not debug:

2417

2780

try:

2418

2781

os.remove(tempname)

2419

2782

except NameError:

2420

2783

pass

2421

if e.errno not in set((errno.ENOENT, errno.EACCES,

2422

errno.EEXIST)):

2423

raise e

2784

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

2785

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

2786

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

2787

else:

2788

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

2789

exc_info=e)

2790

raise

2424

2791

2425

2792

# Delete all clients, and settings from config

2426

2793

while tcp_server.clients:

2450

2817

tcp_server.server_activate()

2451

2818

2452

2819

# Find out what port we got

2453

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

2820

if zeroconf:

2821

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

2454

2822

if use_ipv6:

2455

2823

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

2456

" flowinfo %d, scope_id %d"

2457

% tcp_server.socket.getsockname())

2824

" flowinfo %d, scope_id %d",

2825

*tcp_server.socket.getsockname())

2458

2826

else: # IPv4

2459

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

2460

% tcp_server.socket.getsockname())

2827

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

2828

*tcp_server.socket.getsockname())

2461

2829

2462

2830

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

2463

2831

2464

2832

try:

2465

# From the Avahi example code

2466

try:

2467

service.activate()

2468

except dbus.exceptions.DBusException as error:

2469

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

2470

cleanup()

2471

sys.exit(1)

2472

# End of Avahi example code

2833

if zeroconf:

2834

# From the Avahi example code

2835

try:

2836

service.activate()

2837

except dbus.exceptions.DBusException as error:

2838

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

2839

cleanup()

2840

sys.exit(1)

2841

# End of Avahi example code

2473

2842

2474

2843

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

2475

2844

lambda *args, **kwargs:

2479

2848

logger.debug("Starting main loop")

2480

2849

main_loop.run()

2481

2850

except AvahiError as error:

2482

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

2851

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

2483

2852

cleanup()

2484

2853

sys.exit(1)

2485

2854

except KeyboardInterrupt: