/mandos/release : revision 237.7.203

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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 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 = "1.5.3"

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version = "1.6.3"

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

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"""init logger and add loglevel"""

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syslogger = (logging.handlers.SysLogHandler

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(facility =

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logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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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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'--no-use-agent'])

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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, "w") 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, "w") 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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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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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: {0!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 ({0}) [%(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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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 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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"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 {0}"

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.format(section))

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

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client["extended_timeout"] = string_to_delta(

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section["extended_timeout"])

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client["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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setattr(self, setting, value)

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

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

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datetime.datetime.utcnow())

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# attributes specific for this server instance

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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:

581

self.send_changedstate()

582

if not quiet:

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603

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

584

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

604

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

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605

gobject.source_remove(self.disable_initiator_tag)

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606

self.disable_initiator_tag = None

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607

self.expires = None

588

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

608

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

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gobject.source_remove(self.checker_initiator_tag)

590

610

self.checker_initiator_tag = None

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611

self.stop_checker()

592

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self.enabled = False

613

if not quiet:

614

self.send_changedstate()

593

615

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

594

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return False

595

617

599

621

def init_checker(self):

600

622

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

601

623

# and every interval from then on.

624

if self.checker_initiator_tag is not None:

625

gobject.source_remove(self.checker_initiator_tag)

602

626

self.checker_initiator_tag = (gobject.timeout_add

603

627

(self.interval_milliseconds(),

604

628

self.start_checker))

605

629

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

630

if self.disable_initiator_tag is not None:

631

gobject.source_remove(self.disable_initiator_tag)

606

632

self.disable_initiator_tag = (gobject.timeout_add

607

633

(self.timeout_milliseconds(),

608

634

self.disable))

639

665

timeout = self.timeout

640

666

if self.disable_initiator_tag is not None:

641

667

gobject.source_remove(self.disable_initiator_tag)

668

self.disable_initiator_tag = None

642

669

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

643

670

self.disable_initiator_tag = (gobject.timeout_add

644

671

(timedelta_to_milliseconds

654

681

If a checker already exists, leave it running and do

655

682

nothing."""

656

683

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

657

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

658

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

659

# client would inevitably timeout, since no checker would get

660

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

684

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

685

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

686

# would inevitably timeout, since no checker would get a

687

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

661

688

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

662

689

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

663

690

# should be.

665

692

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

666

693

try:

667

694

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

668

except (AttributeError, OSError) as error:

669

if (isinstance(error, OSError)

670

and error.errno != errno.ECHILD):

671

raise error

695

except AttributeError:

696

pass

697

except OSError as error:

698

if error.errno != errno.ECHILD:

699

raise

672

700

else:

673

701

if pid:

674

702

logger.warning("Checker was a zombie")

677

705

self.current_checker_command)

678

706

# Start a new checker if needed

679

707

if self.checker is None:

708

# Escape attributes for the shell

709

escaped_attrs = dict(

710

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

711

for attr in

712

self.runtime_expansions)

680

713

try:

681

# In case checker_command has exactly one % operator

682

command = self.checker_command % self.host

683

except TypeError:

684

# Escape attributes for the shell

685

escaped_attrs = dict(

686

(attr,

687

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

688

errors=

689

'replace')))

690

for attr in

691

self.runtime_expansions)

692

693

try:

694

command = self.checker_command % escaped_attrs

695

except TypeError as error:

696

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

697

self.checker_command, exc_info=error)

698

return True # Try again later

714

command = self.checker_command % escaped_attrs

715

except TypeError as error:

716

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

717

self.checker_command, exc_info=error)

718

return True # Try again later

699

719

self.current_checker_command = command

700

720

try:

701

721

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

704

724

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

705

725

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

706

726

# always replaced by /dev/null.)

727

# The exception is when not debugging but nevertheless

728

# running in the foreground; use the previously

729

# created wnull.

730

popen_args = {}

731

if (not self.server_settings["debug"]

732

and self.server_settings["foreground"]):

733

popen_args.update({"stdout": wnull,

734

"stderr": wnull })

707

735

self.checker = subprocess.Popen(command,

708

736

close_fds=True,

709

shell=True, cwd="/")

710

self.checker_callback_tag = (gobject.child_watch_add

711

(self.checker.pid,

712

self.checker_callback,

713

data=command))

714

# The checker may have completed before the gobject

715

# watch was added. Check for this.

716

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

717

if pid:

718

gobject.source_remove(self.checker_callback_tag)

719

self.checker_callback(pid, status, command)

737

shell=True, cwd="/",

738

**popen_args)

720

739

except OSError as error:

721

740

logger.error("Failed to start subprocess",

722

741

exc_info=error)

742

return True

743

self.checker_callback_tag = (gobject.child_watch_add

744

(self.checker.pid,

745

self.checker_callback,

746

data=command))

747

# The checker may have completed before the gobject

748

# watch was added. Check for this.

749

try:

750

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

751

except OSError as error:

752

if error.errno == errno.ECHILD:

753

# This should never happen

754

logger.error("Child process vanished",

755

exc_info=error)

756

return True

757

raise

758

if pid:

759

gobject.source_remove(self.checker_callback_tag)

760

self.checker_callback(pid, status, command)

723

761

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

724

762

return True

725

763

758

796

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

759

797

if byte_arrays and signature != "ay":

760

798

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

761

" signature %r" % signature)

799

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

762

800

def decorator(func):

763

801

func._dbus_is_property = True

764

802

func._dbus_interface = dbus_interface

773

811

774

812

775

813

def dbus_interface_annotations(dbus_interface):

776

"""Decorator for marking functions returning interface annotations.

814

"""Decorator for marking functions returning interface annotations

777

815

778

816

Usage:

779

817

898

936

# The byte_arrays option is not supported yet on

899

937

# signatures other than "ay".

900

938

if prop._dbus_signature != "ay":

901

raise ValueError

939

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

940

"'ay' signature {0!r}"

941

.format(prop._dbus_signature))

902

942

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

903

943

for byte in value))

904

944

prop(value)

976

1016

tag.appendChild(ann_tag)

977

1017

# Add interface annotation tags

978

1018

for annotation, value in dict(

979

itertools.chain(

980

*(annotations().iteritems()

981

for name, annotations in

982

self._get_all_dbus_things("interface")

983

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

984

))).iteritems():

1019

itertools.chain.from_iterable(

1020

annotations().iteritems()

1021

for name, annotations in

1022

self._get_all_dbus_things("interface")

1023

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

1024

)).iteritems():

985

1025

ann_tag = document.createElement("annotation")

986

1026

ann_tag.setAttribute("name", annotation)

987

1027

ann_tag.setAttribute("value", value)

1010

1050

return xmlstring

1011

1051

1012

1052

1013

def datetime_to_dbus (dt, variant_level=0):

1053

def datetime_to_dbus(dt, variant_level=0):

1014

1054

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

1015

1055

if dt is None:

1016

1056

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

1018

1058

variant_level=variant_level)

1019

1059

1020

1060

1021

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

1022

.__metaclass__):

1023

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

1024

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

1061

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1062

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

1063

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

1064

interface names according to the "alt_interface_names" mapping.

1065

Usage:

1066

1067

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

1068

"net.example.AlternateInterface"})

1069

class SampleDBusObject(dbus.service.Object):

1070

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

1071

def SampleDBusMethod():

1072

pass

1073

1074

The above "SampleDBusMethod" on "SampleDBusObject" will be

1075

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

1076

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

1077

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

1078

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

1079

1080

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

1081

(from DBusObjectWithProperties) and interfaces (from the

1082

dbus_interface_annotations decorator).

1025

1083

"""

1026

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

1027

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

1028

# methods, signals, or properties in them

1029

old_interface_names = []

1030

for base in (b for b in bases

1031

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

1032

# Go though all attributes of the base class

1033

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

1084

def wrapper(cls):

1085

for orig_interface_name, alt_interface_name in (

1086

alt_interface_names.iteritems()):

1087

attr = {}

1088

interface_names = set()

1089

# Go though all attributes of the class

1090

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

1034

1091

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

1035

1092

# with the wrong interface name

1036

1093

if (not hasattr(attribute, "_dbus_interface")

1037

1094

or not attribute._dbus_interface

1038

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

1095

.startswith(orig_interface_name)):

1039

1096

continue

1040

1097

# Create an alternate D-Bus interface name based on

1041

1098

# the current name

1042

1099

alt_interface = (attribute._dbus_interface

1043

.replace("se.recompile.Mandos",

1044

"se.bsnet.fukt.Mandos"))

1045

if alt_interface != attribute._dbus_interface:

1046

old_interface_names.append(alt_interface)

1100

.replace(orig_interface_name,

1101

alt_interface_name))

1102

interface_names.add(alt_interface)

1047

1103

# Is this a D-Bus signal?

1048

1104

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

1049

# Extract the original non-method function by

1050

# black magic

1105

# Extract the original non-method undecorated

1106

# function by black magic

1051

1107

nonmethod_func = (dict(

1052

1108

zip(attribute.func_code.co_freevars,

1053

1109

attribute.__closure__))["func"]

1071

1127

except AttributeError:

1072

1128

pass

1073

1129

# Define a creator of a function to call both the

1074

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

1075

# signals gets sent when the function is called

1130

# original and alternate functions, so both the

1131

# original and alternate signals gets sent when

1132

# the function is called

1076

1133

def fixscope(func1, func2):

1077

1134

"""This function is a scope container to pass

1078

1135

func1 and func2 to the "call_both" function

1085

1142

return call_both

1086

1143

# Create the "call_both" function and add it to

1087

1144

# the class

1088

attr[attrname] = fixscope(attribute,

1089

new_function)

1145

attr[attrname] = fixscope(attribute, new_function)

1090

1146

# Is this a D-Bus method?

1091

1147

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

1092

1148

# Create a new, but exactly alike, function

1148

1204

attribute.func_name,

1149

1205

attribute.func_defaults,

1150

1206

attribute.func_closure)))

1151

# Deprecate all old interfaces

1152

basename="_AlternateDBusNamesMetaclass_interface_annotation{0}"

1153

for old_interface_name in old_interface_names:

1154

@dbus_interface_annotations(old_interface_name)

1155

def func(self):

1156

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

1157

# Find an unused name

1158

for aname in (basename.format(i) for i in

1159

itertools.count()):

1160

if aname not in attr:

1161

attr[aname] = func

1162

break

1163

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

1164

1165

1207

if deprecate:

1208

# Deprecate all alternate interfaces

1209

iname="_AlternateDBusNames_interface_annotation{0}"

1210

for interface_name in interface_names:

1211

@dbus_interface_annotations(interface_name)

1212

def func(self):

1213

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

1214

"true" }

1215

# Find an unused name

1216

for aname in (iname.format(i)

1217

for i in itertools.count()):

1218

if aname not in attr:

1219

attr[aname] = func

1220

break

1221

if interface_names:

1222

# Replace the class with a new subclass of it with

1223

# methods, signals, etc. as created above.

1224

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

1225

(cls,), attr)

1226

return cls

1227

return wrapper

1228

1229

1230

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

1231

"se.bsnet.fukt.Mandos"})

1166

1232

class ClientDBus(Client, DBusObjectWithProperties):

1167

1233

"""A Client class using D-Bus

1168

1234

1188

1254

("/clients/" + client_object_name))

1189

1255

DBusObjectWithProperties.__init__(self, self.bus,

1190

1256

self.dbus_object_path)

1191

1257

1192

1258

def notifychangeproperty(transform_func,

1193

1259

dbus_name, type_func=lambda x: x,

1194

1260

variant_level=1):

1217

1283

1218

1284

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

1219

1285

1220

1221

1286

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1222

1287

approvals_pending = notifychangeproperty(dbus.Boolean,

1223

1288

"ApprovalPending",

1305

1370

return False

1306

1371

1307

1372

def approve(self, value=True):

1308

self.send_changedstate()

1309

1373

self.approved = value

1310

1374

gobject.timeout_add(timedelta_to_milliseconds

1311

1375

(self.approval_duration),

1312

1376

self._reset_approved)

1313

1377

self.send_changedstate()

1314

1378

1315

1379

## D-Bus methods, signals & properties

1316

1380

_interface = "se.recompile.Mandos.Client"

1500

1564

def Timeout_dbus_property(self, value=None):

1501

1565

if value is None: # get

1502

1566

return dbus.UInt64(self.timeout_milliseconds())

1567

old_timeout = self.timeout

1503

1568

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

1504

# Reschedule timeout

1569

# Reschedule disabling

1505

1570

if self.enabled:

1506

1571

now = datetime.datetime.utcnow()

1507

time_to_die = timedelta_to_milliseconds(

1508

(self.last_checked_ok + self.timeout) - now)

1509

if time_to_die <= 0:

1572

self.expires += self.timeout - old_timeout

1573

if self.expires <= now:

1510

1574

# The timeout has passed

1511

1575

self.disable()

1512

1576

else:

1513

self.expires = (now +

1514

datetime.timedelta(milliseconds =

1515

time_to_die))

1516

1577

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

1517

1578

is None):

1518

1579

return

1519

1580

gobject.source_remove(self.disable_initiator_tag)

1520

self.disable_initiator_tag = (gobject.timeout_add

1521

(time_to_die,

1522

self.disable))

1581

self.disable_initiator_tag = (

1582

gobject.timeout_add(

1583

timedelta_to_milliseconds(self.expires - now),

1584

self.disable))

1523

1585

1524

1586

# ExtendedTimeout - property

1525

1587

@dbus_service_property(_interface, signature="t",

1604

1666

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

1605

1667

1606

1668

1607

class ClientDBusTransitional(ClientDBus):

1608

__metaclass__ = AlternateDBusNamesMetaclass

1609

1610

1611

1669

class ClientHandler(socketserver.BaseRequestHandler, object):

1612

1670

"""A class to handle client connections.

1613

1671

1649

1707

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

1650

1708

try:

1651

1709

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

1652

raise RuntimeError

1710

raise RuntimeError(line)

1653

1711

except (ValueError, IndexError, RuntimeError) as error:

1654

1712

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

1655

1713

return

1717

1775

#wait until timeout or approved

1718

1776

time = datetime.datetime.now()

1719

1777

client.changedstate.acquire()

1720

(client.changedstate.wait

1721

(float(client.timedelta_to_milliseconds(delay)

1722

/ 1000)))

1778

client.changedstate.wait(

1779

float(timedelta_to_milliseconds(delay)

1780

/ 1000))

1723

1781

client.changedstate.release()

1724

1782

time2 = datetime.datetime.now()

1725

1783

if (time2 - time) >= delay:

1741

1799

try:

1742

1800

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

1743

1801

except gnutls.errors.GNUTLSError as error:

1744

logger.warning("gnutls send failed")

1802

logger.warning("gnutls send failed",

1803

exc_info=error)

1745

1804

return

1746

1805

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

1747

1806

sent, len(client.secret)

1761

1820

try:

1762

1821

session.bye()

1763

1822

except gnutls.errors.GNUTLSError as error:

1764

logger.warning("GnuTLS bye failed")

1823

logger.warning("GnuTLS bye failed",

1824

exc_info=error)

1765

1825

1766

1826

@staticmethod

1767

1827

def peer_certificate(session):

1839

1899

def process_request(self, request, address):

1840

1900

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

1841

1901

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

1842

args = (request,

1843

address))

1902

args = (request, address))

1844

1903

proc.start()

1845

1904

return proc

1846

1905

1861

1920

1862

1921

def add_pipe(self, parent_pipe, proc):

1863

1922

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

1864

raise NotImplementedError

1923

raise NotImplementedError()

1865

1924

1866

1925

1867

1926

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1874

1933

use_ipv6: Boolean; to use IPv6 or not

1875

1934

"""

1876

1935

def __init__(self, server_address, RequestHandlerClass,

1877

interface=None, use_ipv6=True):

1936

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

1937

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

1938

creating a new one with socket.socket().

1939

"""

1878

1940

self.interface = interface

1879

1941

if use_ipv6:

1880

1942

self.address_family = socket.AF_INET6

1943

if socketfd is not None:

1944

# Save the file descriptor

1945

self.socketfd = socketfd

1946

# Save the original socket.socket() function

1947

self.socket_socket = socket.socket

1948

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

1949

#

1950

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

1951

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

1952

# patching socket.socket.)

1953

#

1954

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

1955

@functools.wraps(socket.socket)

1956

def socket_wrapper(*args, **kwargs):

1957

# Restore original function so subsequent calls are

1958

# not affected.

1959

socket.socket = self.socket_socket

1960

del self.socket_socket

1961

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

1962

# saved file descriptor.

1963

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

1964

# Replace socket.socket() function with wrapper

1965

socket.socket = socket_wrapper

1966

# The socketserver.TCPServer.__init__ will call

1967

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

1968

# socket_wrapper(), if socketfd was set.

1881

1969

socketserver.TCPServer.__init__(self, server_address,

1882

1970

RequestHandlerClass)

1971

1883

1972

def server_bind(self):

1884

1973

"""This overrides the normal server_bind() function

1885

1974

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

1893

1982

try:

1894

1983

self.socket.setsockopt(socket.SOL_SOCKET,

1895

1984

SO_BINDTODEVICE,

1896

str(self.interface

1897

+ '\0'))

1985

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

1898

1986

except socket.error as error:

1899

if error[0] == errno.EPERM:

1900

logger.error("No permission to"

1901

" bind to interface %s",

1902

self.interface)

1903

elif error[0] == errno.ENOPROTOOPT:

1987

if error.errno == errno.EPERM:

1988

logger.error("No permission to bind to"

1989

" interface %s", self.interface)

1990

elif error.errno == errno.ENOPROTOOPT:

1904

1991

logger.error("SO_BINDTODEVICE not available;"

1905

1992

" cannot bind to interface %s",

1906

1993

self.interface)

1994

elif error.errno == errno.ENODEV:

1995

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

1996

" cannot bind", self.interface)

1907

1997

else:

1908

1998

raise

1909

1999

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

1912

2002

if self.address_family == socket.AF_INET6:

1913

2003

any_address = "::" # in6addr_any

1914

2004

else:

1915

any_address = socket.INADDR_ANY

2005

any_address = "0.0.0.0" # INADDR_ANY

1916

2006

self.server_address = (any_address,

1917

2007

self.server_address[1])

1918

2008

elif not self.server_address[1]:

1939

2029

"""

1940

2030

def __init__(self, server_address, RequestHandlerClass,

1941

2031

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

1942

gnutls_priority=None, use_dbus=True):

2032

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

1943

2033

self.enabled = False

1944

2034

self.clients = clients

1945

2035

if self.clients is None:

1949

2039

IPv6_TCPServer.__init__(self, server_address,

1950

2040

RequestHandlerClass,

1951

2041

interface = interface,

1952

use_ipv6 = use_ipv6)

2042

use_ipv6 = use_ipv6,

2043

socketfd = socketfd)

1953

2044

def server_activate(self):

1954

2045

if self.enabled:

1955

2046

return socketserver.TCPServer.server_activate(self)

1968

2059

1969

2060

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

1970

2061

proc = None, client_object=None):

1971

condition_names = {

1972

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

1973

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

1974

# blocking).

1975

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

1976

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

1977

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

1978

# broken, usually for pipes and

1979

# sockets).

1980

}

1981

conditions_string = ' | '.join(name

1982

for cond, name in

1983

condition_names.iteritems()

1984

if cond & condition)

1985

2062

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

1986

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

2063

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

1987

2064

# Wait for other process to exit

1988

2065

proc.join()

1989

2066

return False

2047

2124

return True

2048

2125

2049

2126

2127

def rfc3339_duration_to_delta(duration):

2128

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

2129

2130

>>> rfc3339_duration_to_delta("P7D")

2131

datetime.timedelta(7)

2132

>>> rfc3339_duration_to_delta("PT60S")

2133

datetime.timedelta(0, 60)

2134

>>> rfc3339_duration_to_delta("PT60M")

2135

datetime.timedelta(0, 3600)

2136

>>> rfc3339_duration_to_delta("PT24H")

2137

datetime.timedelta(1)

2138

>>> rfc3339_duration_to_delta("P1W")

2139

datetime.timedelta(7)

2140

>>> rfc3339_duration_to_delta("PT5M30S")

2141

datetime.timedelta(0, 330)

2142

>>> rfc3339_duration_to_delta("P1DT3M20S")

2143

datetime.timedelta(1, 200)

2144

"""

2145

2146

# Parsing an RFC 3339 duration with regular expressions is not

2147

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

2148

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

2149

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

2150

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

2151

# avoid excessive use of external libraries.

2152

2153

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

2154

Token = collections.namedtuple("Token",

2155

("regexp", # To match token; if

2156

# "value" is not None,

2157

# must have a "group"

2158

# containing digits

2159

"value", # datetime.timedelta or

2160

# None

2161

"followers")) # Tokens valid after

2162

# this token

2163

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

2164

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

2165

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

2166

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

2167

datetime.timedelta(seconds=1),

2168

frozenset((token_end,)))

2169

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

2170

datetime.timedelta(minutes=1),

2171

frozenset((token_second, token_end)))

2172

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

2173

datetime.timedelta(hours=1),

2174

frozenset((token_minute, token_end)))

2175

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

2176

None,

2177

frozenset((token_hour, token_minute,

2178

token_second)))

2179

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

2180

datetime.timedelta(days=1),

2181

frozenset((token_time, token_end)))

2182

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

2183

datetime.timedelta(weeks=4),

2184

frozenset((token_day, token_end)))

2185

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

2186

datetime.timedelta(weeks=52),

2187

frozenset((token_month, token_end)))

2188

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

2189

datetime.timedelta(weeks=1),

2190

frozenset((token_end,)))

2191

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

2192

frozenset((token_year, token_month,

2193

token_day, token_time,

2194

token_week))),

2195

# Define starting values

2196

value = datetime.timedelta() # Value so far

2197

found_token = None

2198

followers = frozenset(token_duration,) # Following valid tokens

2199

s = duration # String left to parse

2200

# Loop until end token is found

2201

while found_token is not token_end:

2202

# Search for any currently valid tokens

2203

for token in followers:

2204

match = token.regexp.match(s)

2205

if match is not None:

2206

# Token found

2207

if token.value is not None:

2208

# Value found, parse digits

2209

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

2210

# Add to value so far

2211

value += factor * token.value

2212

# Strip token from string

2213

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

2214

# Go to found token

2215

found_token = token

2216

# Set valid next tokens

2217

followers = found_token.followers

2218

break

2219

else:

2220

# No currently valid tokens were found

2221

raise ValueError("Invalid RFC 3339 duration")

2222

# End token found

2223

return value

2224

2225

2050

2226

def string_to_delta(interval):

2051

2227

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

2052

2228

2063

2239

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

2064

2240

datetime.timedelta(0, 330)

2065

2241

"""

2242

2243

try:

2244

return rfc3339_duration_to_delta(interval)

2245

except ValueError:

2246

pass

2247

2066

2248

timevalue = datetime.timedelta(0)

2067

2249

for s in interval.split():

2068

2250

try:

2079

2261

elif suffix == "w":

2080

2262

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

2081

2263

else:

2082

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

2083

except (ValueError, IndexError) as e:

2264

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

2265

.format(suffix))

2266

except IndexError as e:

2084

2267

raise ValueError(*(e.args))

2085

2268

timevalue += delta

2086

2269

return timevalue

2102

2285

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

2103

2286

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

2104

2287

raise OSError(errno.ENODEV,

2105

"%s not a character device"

2106

% os.devnull)

2288

"{0} not a character device"

2289

.format(os.devnull))

2107

2290

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

2108

2291

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

2109

2292

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

2118

2301

2119

2302

parser = argparse.ArgumentParser()

2120

2303

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

2121

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

2304

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

2122

2305

help="show version number and exit")

2123

2306

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

2124

2307

help="Bind to interface IF")

2130

2313

help="Run self-test")

2131

2314

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

2132

2315

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

2133

" to terminal")

2316

" to terminal", default=None)

2134

2317

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

2135

2318

help="Debug level for stdout output")

2136

2319

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

2143

2326

" files")

2144

2327

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

2145

2328

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

2146

" system bus interface")

2329

" system bus interface", default=None)

2147

2330

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

2148

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

2331

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

2332

default=None)

2149

2333

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

2150

2334

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

2151

" state")

2335

" state", default=None)

2336

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

2337

help="Specify a file descriptor to a network"

2338

" socket to use instead of creating one")

2152

2339

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

2153

2340

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

2341

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

2342

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

2154

2343

2155

2344

options = parser.parse_args()

2156

2345

2157

2346

if options.check:

2158

2347

import doctest

2159

doctest.testmod()

2160

sys.exit()

2348

fail_count, test_count = doctest.testmod()

2349

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

2161

2350

2162

2351

# Default values for config file for server-global settings

2163

2352

server_defaults = { "interface": "",

2165

2354

"port": "",

2166

2355

"debug": "False",

2167

2356

"priority":

2168

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

2357

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

2169

2358

"servicename": "Mandos",

2170

2359

"use_dbus": "True",

2171

2360

"use_ipv6": "True",

2172

2361

"debuglevel": "",

2173

2362

"restore": "True",

2174

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

2363

"socket": "",

2364

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

2365

"foreground": "False",

2175

2366

}

2176

2367

2177

2368

# Parse config file for server-global settings

2182

2373

# Convert the SafeConfigParser object to a dict

2183

2374

server_settings = server_config.defaults()

2184

2375

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

2185

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

2376

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

2186

2377

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

2187

2378

option)

2188

2379

if server_settings["port"]:

2189

2380

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

2190

2381

"port")

2382

if server_settings["socket"]:

2383

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

2384

"socket")

2385

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

2386

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

2387

# happen with a supplied network socket.

2388

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

2389

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

2390

["socket"])

2191

2391

del server_config

2192

2392

2193

2393

# Override the settings from the config file with command line

2195

2395

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

2196

2396

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

2197

2397

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

2198

"statedir"):

2398

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

2199

2399

value = getattr(options, option)

2200

2400

if value is not None:

2201

2401

server_settings[option] = value

2204

2404

for option in server_settings.keys():

2205

2405

if type(server_settings[option]) is str:

2206

2406

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

2407

# Force all boolean options to be boolean

2408

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

2409

"foreground"):

2410

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

2411

# Debug implies foreground

2412

if server_settings["debug"]:

2413

server_settings["foreground"] = True

2207

2414

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

2208

2415

2209

2416

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

2215

2422

use_ipv6 = server_settings["use_ipv6"]

2216

2423

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

2217

2424

stored_state_file)

2425

foreground = server_settings["foreground"]

2218

2426

2219

2427

if debug:

2220

2428

initlogger(debug, logging.DEBUG)

2227

2435

2228

2436

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

2229

2437

syslogger.setFormatter(logging.Formatter

2230

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

2231

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

2232

% server_settings["servicename"]))

2438

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

2439

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

2440

.format(server_settings

2441

["servicename"])))

2233

2442

2234

2443

# Parse config file with clients

2235

2444

client_config = configparser.SafeConfigParser(Client

2248

2457

use_ipv6=use_ipv6,

2249

2458

gnutls_priority=

2250

2459

server_settings["priority"],

2251

use_dbus=use_dbus)

2252

if not debug:

2253

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

2460

use_dbus=use_dbus,

2461

socketfd=(server_settings["socket"]

2462

or None))

2463

if not foreground:

2464

pidfilename = "/run/mandos.pid"

2465

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

2466

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

2467

pidfile = None

2254

2468

try:

2255

2469

pidfile = open(pidfilename, "w")

2256

except IOError:

2257

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

2470

except IOError as e:

2471

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

2472

exc_info=e)

2258

2473

2259

try:

2260

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

2261

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

2262

except KeyError:

2474

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

2263

2475

try:

2264

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

2265

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

2476

uid = pwd.getpwnam(name).pw_uid

2477

gid = pwd.getpwnam(name).pw_gid

2478

break

2266

2479

except KeyError:

2267

try:

2268

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

2269

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

2270

except KeyError:

2271

uid = 65534

2272

gid = 65534

2480

continue

2481

else:

2482

uid = 65534

2483

gid = 65534

2273

2484

try:

2274

2485

os.setgid(gid)

2275

2486

os.setuid(uid)

2276

2487

except OSError as error:

2277

if error[0] != errno.EPERM:

2278

raise error

2488

if error.errno != errno.EPERM:

2489

raise

2279

2490

2280

2491

if debug:

2281

2492

# Enable all possible GnuTLS debugging

2298

2509

os.close(null)

2299

2510

2300

2511

# Need to fork before connecting to D-Bus

2301

if not debug:

2512

if not foreground:

2302

2513

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

2303

2514

daemon()

2304

2515

2516

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

2517

# need to inform gobject that threads will be used.

2305

2518

gobject.threads_init()

2306

2519

2307

2520

global main_loop

2318

2531

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

2319

2532

do_not_queue=True))

2320

2533

except dbus.exceptions.NameExistsException as e:

2321

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

2534

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

2322

2535

use_dbus = False

2323

2536

server_settings["use_dbus"] = False

2324

2537

tcp_server.use_dbus = False

2336

2549

2337

2550

client_class = Client

2338

2551

if use_dbus:

2339

client_class = functools.partial(ClientDBusTransitional,

2340

bus = bus)

2552

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

2341

2553

2342

2554

client_settings = Client.config_parser(client_config)

2343

2555

old_client_settings = {}

2344

2556

clients_data = {}

2345

2557

2558

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

2559

global wnull

2560

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

2561

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

2562

# mode

2563

if debug or not foreground:

2564

wnull.close()

2565

2346

2566

# Get client data and settings from last running state.

2347

2567

if server_settings["restore"]:

2348

2568

try:

2351

2571

(stored_state))

2352

2572

os.remove(stored_state_path)

2353

2573

except IOError as e:

2354

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

2355

.format(e))

2356

if e.errno != errno.ENOENT:

2574

if e.errno == errno.ENOENT:

2575

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

2576

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

2577

else:

2578

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

2579

exc_info=e)

2357

2580

raise

2358

2581

except EOFError as e:

2359

2582

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

2360

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

2583

"EOFError:", exc_info=e)

2361

2584

2362

2585

with PGPEngine() as pgp:

2363

2586

for client_name, client in clients_data.iteritems():

2587

# Skip removed clients

2588

if client_name not in client_settings:

2589

continue

2590

2364

2591

# Decide which value to use after restoring saved state.

2365

2592

# We have three different values: Old config file,

2366

2593

# new config file, and saved state.

2416

2643

.format(client_name))

2417

2644

client["secret"] = (

2418

2645

client_settings[client_name]["secret"])

2419

2420

2646

2421

2647

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

2422

2648

for client_name in (set(old_client_settings)

2425

2651

for client_name in (set(client_settings)

2426

2652

- set(old_client_settings)):

2427

2653

clients_data[client_name] = client_settings[client_name]

2428

2654

2429

2655

# Create all client objects

2430

2656

for client_name, client in clients_data.iteritems():

2431

2657

tcp_server.clients[client_name] = client_class(

2432

name = client_name, settings = client)

2658

name = client_name, settings = client,

2659

server_settings = server_settings)

2433

2660

2434

2661

if not tcp_server.clients:

2435

2662

logger.warning("No clients defined")

2436

2437

if not debug:

2438

try:

2439

with pidfile:

2440

pid = os.getpid()

2441

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

2442

del pidfile

2443

except IOError:

2444

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

2445

pidfilename, pid)

2446

except NameError:

2447

# "pidfile" was never created

2448

pass

2663

2664

if not foreground:

2665

if pidfile is not None:

2666

try:

2667

with pidfile:

2668

pid = os.getpid()

2669

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

2670

except IOError:

2671

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

2672

pidfilename, pid)

2673

del pidfile

2449

2674

del pidfilename

2450

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

2451

2675

2452

2676

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

2453

2677

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

2454

2678

2455

2679

if use_dbus:

2680

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

2681

"se.bsnet.fukt.Mandos"})

2456

2682

class MandosDBusService(DBusObjectWithProperties):

2457

2683

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

2458

2684

def __init__(self):

2512

2738

2513

2739

del _interface

2514

2740

2515

class MandosDBusServiceTransitional(MandosDBusService):

2516

__metaclass__ = AlternateDBusNamesMetaclass

2517

mandos_dbus_service = MandosDBusServiceTransitional()

2741

mandos_dbus_service = MandosDBusService()

2518

2742

2519

2743

def cleanup():

2520

2744

"Cleanup function; run on exit"

2521

2745

service.cleanup()

2522

2746

2523

2747

multiprocessing.active_children()

2748

wnull.close()

2524

2749

if not (tcp_server.clients or client_settings):

2525

2750

return

2526

2751

2538

2763

# A list of attributes that can not be pickled

2539

2764

# + secret.

2540

2765

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

2541

"checker"))

2766

"checker", "server_settings"))

2542

2767

for name, typ in (inspect.getmembers

2543

2768

(dbus.service.Object)):

2544

2769

exclude.add(name)

2553

2778

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

2554

2779

2555

2780

try:

2556

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

2557

prefix="clients-",

2558

dir=os.path.dirname

2559

(stored_state_path))

2560

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

2781

with (tempfile.NamedTemporaryFile

2782

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

2783

dir=os.path.dirname(stored_state_path),

2784

delete=False)) as stored_state:

2561

2785

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

2786

tempname=stored_state.name

2562

2787

os.rename(tempname, stored_state_path)

2563

2788

except (IOError, OSError) as e:

2564

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

2565

.format(e))

2566

2789

if not debug:

2567

2790

try:

2568

2791

os.remove(tempname)

2569

2792

except NameError:

2570

2793

pass

2571

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

2572

errno.EEXIST)):

2573

raise e

2794

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

2795

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

2796

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

2797

else:

2798

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

2799

exc_info=e)

2800

raise

2574

2801

2575

2802

# Delete all clients, and settings from config

2576

2803

while tcp_server.clients:

2603

2830

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

2604

2831

if use_ipv6:

2605

2832

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

2606

" flowinfo %d, scope_id %d"

2607

% tcp_server.socket.getsockname())

2833

" flowinfo %d, scope_id %d",

2834

*tcp_server.socket.getsockname())

2608

2835

else: # IPv4

2609

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

2610

% tcp_server.socket.getsockname())

2836

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

2837

*tcp_server.socket.getsockname())

2611

2838

2612

2839

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

2613

2840