/mandos/release : revision 237.7.195

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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 = "1.6.2"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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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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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: {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:

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self.send_changedstate()

582

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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609

self.stop_checker()

592

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self.enabled = False

611

if not quiet:

612

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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619

def init_checker(self):

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

601

621

# and every interval from then on.

622

if self.checker_initiator_tag is not None:

623

gobject.source_remove(self.checker_initiator_tag)

602

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self.checker_initiator_tag = (gobject.timeout_add

603

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(self.interval_milliseconds(),

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self.start_checker))

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

628

if self.disable_initiator_tag is not None:

629

gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = (gobject.timeout_add

607

631

(self.timeout_milliseconds(),

608

632

self.disable))

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663

timeout = self.timeout

640

664

if self.disable_initiator_tag is not None:

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665

gobject.source_remove(self.disable_initiator_tag)

666

self.disable_initiator_tag = None

642

667

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

643

668

self.disable_initiator_tag = (gobject.timeout_add

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669

(timedelta_to_milliseconds

654

679

If a checker already exists, leave it running and do

655

680

nothing."""

656

681

# 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

682

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

683

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

684

# would inevitably timeout, since no checker would get a

685

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

661

686

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

662

687

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

663

688

# should be.

665

690

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

666

691

try:

667

692

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

693

except AttributeError:

694

pass

695

except OSError as error:

696

if error.errno != errno.ECHILD:

697

raise

672

698

else:

673

699

if pid:

674

700

logger.warning("Checker was a zombie")

677

703

self.current_checker_command)

678

704

# Start a new checker if needed

679

705

if self.checker is None:

706

# Escape attributes for the shell

707

escaped_attrs = dict(

708

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

709

for attr in

710

self.runtime_expansions)

680

711

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

' %s', self.checker_command, error)

698

return True # Try again later

712

command = self.checker_command % escaped_attrs

713

except TypeError as error:

714

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

715

self.checker_command, exc_info=error)

716

return True # Try again later

699

717

self.current_checker_command = command

700

718

try:

701

719

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

704

722

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

705

723

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

706

724

# always replaced by /dev/null.)

725

# The exception is when not debugging but nevertheless

726

# running in the foreground; use the previously

727

# created wnull.

728

popen_args = {}

729

if (not self.server_settings["debug"]

730

and self.server_settings["foreground"]):

731

popen_args.update({"stdout": wnull,

732

"stderr": wnull })

707

733

self.checker = subprocess.Popen(command,

708

734

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.

735

shell=True, cwd="/",

736

**popen_args)

737

except OSError as error:

738

logger.error("Failed to start subprocess",

739

exc_info=error)

740

return True

741

self.checker_callback_tag = (gobject.child_watch_add

742

(self.checker.pid,

743

self.checker_callback,

744

data=command))

745

# The checker may have completed before the gobject

746

# watch was added. Check for this.

747

try:

716

748

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)

720

749

except OSError as error:

721

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

722

error)

750

if error.errno == errno.ECHILD:

751

# This should never happen

752

logger.error("Child process vanished",

753

exc_info=error)

754

return True

755

raise

756

if pid:

757

gobject.source_remove(self.checker_callback_tag)

758

self.checker_callback(pid, status, command)

723

759

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

724

760

return True

725

761

732

768

return

733

769

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

734

770

try:

735

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

771

self.checker.terminate()

736

772

#time.sleep(0.5)

737

773

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

738

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

774

# self.checker.kill()

739

775

except OSError as error:

740

776

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

741

777

raise

758

794

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

759

795

if byte_arrays and signature != "ay":

760

796

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

761

" signature %r" % signature)

797

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

762

798

def decorator(func):

763

799

func._dbus_is_property = True

764

800

func._dbus_interface = dbus_interface

773

809

774

810

775

811

def dbus_interface_annotations(dbus_interface):

776

"""Decorator for marking functions returning interface annotations.

812

"""Decorator for marking functions returning interface annotations

777

813

778

814

Usage:

779

815

791

827

return decorator

792

828

793

829

830

def dbus_annotations(annotations):

831

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

832

Usage:

833

834

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

835

access="r")

836

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

837

"org.freedesktop.DBus.Property."

838

"EmitsChangedSignal": "false"})

839

def Property_dbus_property(self):

840

return dbus.Boolean(False)

841

"""

842

def decorator(func):

843

func._dbus_annotations = annotations

844

return func

845

return decorator

846

847

794

848

class DBusPropertyException(dbus.exceptions.DBusException):

795

849

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

796

850

"""

831

885

def _get_all_dbus_things(self, thing):

832

886

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

833

887

"""

834

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

888

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

889

name),

835

890

athing.__get__(self))

836

891

for cls in self.__class__.__mro__

837

892

for name, athing in

936

991

if prop._dbus_interface

937

992

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

938

993

if_tag.appendChild(tag)

994

# Add annotation tags

995

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

996

for tag in if_tag.getElementsByTagName(typ):

997

annots = dict()

998

for name, prop in (self.

999

_get_all_dbus_things(typ)):

1000

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

1001

and prop._dbus_interface

1002

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

1003

annots.update(getattr

1004

(prop,

1005

"_dbus_annotations",

1006

{}))

1007

for name, value in annots.iteritems():

1008

ann_tag = document.createElement(

1009

"annotation")

1010

ann_tag.setAttribute("name", name)

1011

ann_tag.setAttribute("value", value)

1012

tag.appendChild(ann_tag)

939

1013

# Add interface annotation tags

940

1014

for annotation, value in dict(

941

itertools.chain(

942

*(annotations().iteritems()

943

for name, annotations in

944

self._get_all_dbus_things("interface")

945

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

946

))).iteritems():

947

attr_tag = document.createElement("annotation")

948

attr_tag.setAttribute("name", annotation)

949

attr_tag.setAttribute("value", value)

950

if_tag.appendChild(attr_tag)

1015

itertools.chain.from_iterable(

1016

annotations().iteritems()

1017

for name, annotations in

1018

self._get_all_dbus_things("interface")

1019

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

1020

)).iteritems():

1021

ann_tag = document.createElement("annotation")

1022

ann_tag.setAttribute("name", annotation)

1023

ann_tag.setAttribute("value", value)

1024

if_tag.appendChild(ann_tag)

951

1025

# Add the names to the return values for the

952

1026

# "org.freedesktop.DBus.Properties" methods

953

1027

if (if_tag.getAttribute("name")

968

1042

except (AttributeError, xml.dom.DOMException,

969

1043

xml.parsers.expat.ExpatError) as error:

970

1044

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

971

error)

1045

exc_info=error)

972

1046

return xmlstring

973

1047

974

1048

975

def datetime_to_dbus (dt, variant_level=0):

1049

def datetime_to_dbus(dt, variant_level=0):

976

1050

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

977

1051

if dt is None:

978

1052

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

980

1054

variant_level=variant_level)

981

1055

982

1056

983

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

984

.__metaclass__):

985

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

986

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

1057

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1058

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

1059

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

1060

interface names according to the "alt_interface_names" mapping.

1061

Usage:

1062

1063

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

1064

"net.example.AlternateInterface"})

1065

class SampleDBusObject(dbus.service.Object):

1066

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

1067

def SampleDBusMethod():

1068

pass

1069

1070

The above "SampleDBusMethod" on "SampleDBusObject" will be

1071

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

1072

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

1073

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

1074

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

1075

1076

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

1077

(from DBusObjectWithProperties) and interfaces (from the

1078

dbus_interface_annotations decorator).

987

1079

"""

988

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

989

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

990

# methods, signals, or properties in them

991

old_interface_names = []

992

for base in (b for b in bases

993

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

994

# Go though all attributes of the base class

995

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

1080

def wrapper(cls):

1081

for orig_interface_name, alt_interface_name in (

1082

alt_interface_names.iteritems()):

1083

attr = {}

1084

interface_names = set()

1085

# Go though all attributes of the class

1086

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

996

1087

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

997

1088

# with the wrong interface name

998

1089

if (not hasattr(attribute, "_dbus_interface")

999

1090

or not attribute._dbus_interface

1000

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

1091

.startswith(orig_interface_name)):

1001

1092

continue

1002

1093

# Create an alternate D-Bus interface name based on

1003

1094

# the current name

1004

1095

alt_interface = (attribute._dbus_interface

1005

.replace("se.recompile.Mandos",

1006

"se.bsnet.fukt.Mandos"))

1007

if alt_interface != attribute._dbus_interface:

1008

old_interface_names.append(alt_interface)

1096

.replace(orig_interface_name,

1097

alt_interface_name))

1098

interface_names.add(alt_interface)

1009

1099

# Is this a D-Bus signal?

1010

1100

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

1011

# Extract the original non-method function by

1012

# black magic

1101

# Extract the original non-method undecorated

1102

# function by black magic

1013

1103

nonmethod_func = (dict(

1014

1104

zip(attribute.func_code.co_freevars,

1015

1105

attribute.__closure__))["func"]

1026

1116

nonmethod_func.func_name,

1027

1117

nonmethod_func.func_defaults,

1028

1118

nonmethod_func.func_closure)))

1119

# Copy annotations, if any

1120

try:

1121

new_function._dbus_annotations = (

1122

dict(attribute._dbus_annotations))

1123

except AttributeError:

1124

pass

1029

1125

# Define a creator of a function to call both the

1030

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

1031

# signals gets sent when the function is called

1126

# original and alternate functions, so both the

1127

# original and alternate signals gets sent when

1128

# the function is called

1032

1129

def fixscope(func1, func2):

1033

1130

"""This function is a scope container to pass

1034

1131

func1 and func2 to the "call_both" function

1041

1138

return call_both

1042

1139

# Create the "call_both" function and add it to

1043

1140

# the class

1044

attr[attrname] = fixscope(attribute,

1045

new_function)

1141

attr[attrname] = fixscope(attribute, new_function)

1046

1142

# Is this a D-Bus method?

1047

1143

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

1048

1144

# Create a new, but exactly alike, function

1059

1155

attribute.func_name,

1060

1156

attribute.func_defaults,

1061

1157

attribute.func_closure)))

1158

# Copy annotations, if any

1159

try:

1160

attr[attrname]._dbus_annotations = (

1161

dict(attribute._dbus_annotations))

1162

except AttributeError:

1163

pass

1062

1164

# Is this a D-Bus property?

1063

1165

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

1064

1166

# Create a new, but exactly alike, function

1078

1180

attribute.func_name,

1079

1181

attribute.func_defaults,

1080

1182

attribute.func_closure)))

1183

# Copy annotations, if any

1184

try:

1185

attr[attrname]._dbus_annotations = (

1186

dict(attribute._dbus_annotations))

1187

except AttributeError:

1188

pass

1081

1189

# Is this a D-Bus interface?

1082

1190

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

1083

1191

# Create a new, but exactly alike, function

1092

1200

attribute.func_name,

1093

1201

attribute.func_defaults,

1094

1202

attribute.func_closure)))

1095

# Deprecate all old interfaces

1096

basename="_AlternateDBusNamesMetaclass_interface_annotation{0}"

1097

for old_interface_name in old_interface_names:

1098

@dbus_interface_annotations(old_interface_name)

1099

def func(self):

1100

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

1101

# Find an unused name

1102

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

1103

itertools.count()):

1104

if aname not in attr:

1105

attr[aname] = func

1106

break

1107

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

1108

1109

1203

if deprecate:

1204

# Deprecate all alternate interfaces

1205

iname="_AlternateDBusNames_interface_annotation{0}"

1206

for interface_name in interface_names:

1207

@dbus_interface_annotations(interface_name)

1208

def func(self):

1209

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

1210

"true" }

1211

# Find an unused name

1212

for aname in (iname.format(i)

1213

for i in itertools.count()):

1214

if aname not in attr:

1215

attr[aname] = func

1216

break

1217

if interface_names:

1218

# Replace the class with a new subclass of it with

1219

# methods, signals, etc. as created above.

1220

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

1221

(cls,), attr)

1222

return cls

1223

return wrapper

1224

1225

1226

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

1227

"se.bsnet.fukt.Mandos"})

1110

1228

class ClientDBus(Client, DBusObjectWithProperties):

1111

1229

"""A Client class using D-Bus

1112

1230

1132

1250

("/clients/" + client_object_name))

1133

1251

DBusObjectWithProperties.__init__(self, self.bus,

1134

1252

self.dbus_object_path)

1135

1253

1136

1254

def notifychangeproperty(transform_func,

1137

1255

dbus_name, type_func=lambda x: x,

1138

1256

variant_level=1):

1161

1279

1162

1280

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

1163

1281

1164

1165

1282

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1166

1283

approvals_pending = notifychangeproperty(dbus.Boolean,

1167

1284

"ApprovalPending",

1249

1366

return False

1250

1367

1251

1368

def approve(self, value=True):

1252

self.send_changedstate()

1253

1369

self.approved = value

1254

1370

gobject.timeout_add(timedelta_to_milliseconds

1255

1371

(self.approval_duration),

1256

1372

self._reset_approved)

1257

1373

self.send_changedstate()

1258

1374

1259

1375

## D-Bus methods, signals & properties

1260

1376

_interface = "se.recompile.Mandos.Client"

1444

1560

def Timeout_dbus_property(self, value=None):

1445

1561

if value is None: # get

1446

1562

return dbus.UInt64(self.timeout_milliseconds())

1563

old_timeout = self.timeout

1447

1564

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

1448

# Reschedule timeout

1565

# Reschedule disabling

1449

1566

if self.enabled:

1450

1567

now = datetime.datetime.utcnow()

1451

time_to_die = timedelta_to_milliseconds(

1452

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

1453

if time_to_die <= 0:

1568

self.expires += self.timeout - old_timeout

1569

if self.expires <= now:

1454

1570

# The timeout has passed

1455

1571

self.disable()

1456

1572

else:

1457

self.expires = (now +

1458

datetime.timedelta(milliseconds =

1459

time_to_die))

1460

1573

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

1461

1574

is None):

1462

1575

return

1463

1576

gobject.source_remove(self.disable_initiator_tag)

1464

self.disable_initiator_tag = (gobject.timeout_add

1465

(time_to_die,

1466

self.disable))

1577

self.disable_initiator_tag = (

1578

gobject.timeout_add(

1579

timedelta_to_milliseconds(self.expires - now),

1580

self.disable))

1467

1581

1468

1582

# ExtendedTimeout - property

1469

1583

@dbus_service_property(_interface, signature="t",

1548

1662

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

1549

1663

1550

1664

1551

class ClientDBusTransitional(ClientDBus):

1552

__metaclass__ = AlternateDBusNamesMetaclass

1553

1554

1555

1665

class ClientHandler(socketserver.BaseRequestHandler, object):

1556

1666

"""A class to handle client connections.

1557

1667

1593

1703

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

1594

1704

try:

1595

1705

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

1596

raise RuntimeError

1706

raise RuntimeError(line)

1597

1707

except (ValueError, IndexError, RuntimeError) as error:

1598

1708

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

1599

1709

return

1661

1771

#wait until timeout or approved

1662

1772

time = datetime.datetime.now()

1663

1773

client.changedstate.acquire()

1664

(client.changedstate.wait

1665

(float(client.timedelta_to_milliseconds(delay)

1666

/ 1000)))

1774

client.changedstate.wait(

1775

float(timedelta_to_milliseconds(delay)

1776

/ 1000))

1667

1777

client.changedstate.release()

1668

1778

time2 = datetime.datetime.now()

1669

1779

if (time2 - time) >= delay:

1685

1795

try:

1686

1796

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

1687

1797

except gnutls.errors.GNUTLSError as error:

1688

logger.warning("gnutls send failed")

1798

logger.warning("gnutls send failed",

1799

exc_info=error)

1689

1800

return

1690

1801

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

1691

1802

sent, len(client.secret)

1705

1816

try:

1706

1817

session.bye()

1707

1818

except gnutls.errors.GNUTLSError as error:

1708

logger.warning("GnuTLS bye failed")

1819

logger.warning("GnuTLS bye failed",

1820

exc_info=error)

1709

1821

1710

1822

@staticmethod

1711

1823

def peer_certificate(session):

1783

1895

def process_request(self, request, address):

1784

1896

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

1785

1897

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

1786

args = (request,

1787

address))

1898

args = (request, address))

1788

1899

proc.start()

1789

1900

return proc

1790

1901

1805

1916

1806

1917

def add_pipe(self, parent_pipe, proc):

1807

1918

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

1808

raise NotImplementedError

1919

raise NotImplementedError()

1809

1920

1810

1921

1811

1922

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1818

1929

use_ipv6: Boolean; to use IPv6 or not

1819

1930

"""

1820

1931

def __init__(self, server_address, RequestHandlerClass,

1821

interface=None, use_ipv6=True):

1932

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

1933

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

1934

creating a new one with socket.socket().

1935

"""

1822

1936

self.interface = interface

1823

1937

if use_ipv6:

1824

1938

self.address_family = socket.AF_INET6

1939

if socketfd is not None:

1940

# Save the file descriptor

1941

self.socketfd = socketfd

1942

# Save the original socket.socket() function

1943

self.socket_socket = socket.socket

1944

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

1945

#

1946

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

1947

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

1948

# patching socket.socket.)

1949

#

1950

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

1951

@functools.wraps(socket.socket)

1952

def socket_wrapper(*args, **kwargs):

1953

# Restore original function so subsequent calls are

1954

# not affected.

1955

socket.socket = self.socket_socket

1956

del self.socket_socket

1957

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

1958

# saved file descriptor.

1959

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

1960

# Replace socket.socket() function with wrapper

1961

socket.socket = socket_wrapper

1962

# The socketserver.TCPServer.__init__ will call

1963

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

1964

# socket_wrapper(), if socketfd was set.

1825

1965

socketserver.TCPServer.__init__(self, server_address,

1826

1966

RequestHandlerClass)

1967

1827

1968

def server_bind(self):

1828

1969

"""This overrides the normal server_bind() function

1829

1970

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

1837

1978

try:

1838

1979

self.socket.setsockopt(socket.SOL_SOCKET,

1839

1980

SO_BINDTODEVICE,

1840

str(self.interface

1841

+ '\0'))

1981

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

1842

1982

except socket.error as error:

1843

if error[0] == errno.EPERM:

1844

logger.error("No permission to"

1845

" bind to interface %s",

1846

self.interface)

1847

elif error[0] == errno.ENOPROTOOPT:

1983

if error.errno == errno.EPERM:

1984

logger.error("No permission to bind to"

1985

" interface %s", self.interface)

1986

elif error.errno == errno.ENOPROTOOPT:

1848

1987

logger.error("SO_BINDTODEVICE not available;"

1849

1988

" cannot bind to interface %s",

1850

1989

self.interface)

1990

elif error.errno == errno.ENODEV:

1991

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

1992

" cannot bind", self.interface)

1851

1993

else:

1852

1994

raise

1853

1995

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

1856

1998

if self.address_family == socket.AF_INET6:

1857

1999

any_address = "::" # in6addr_any

1858

2000

else:

1859

any_address = socket.INADDR_ANY

2001

any_address = "0.0.0.0" # INADDR_ANY

1860

2002

self.server_address = (any_address,

1861

2003

self.server_address[1])

1862

2004

elif not self.server_address[1]:

1883

2025

"""

1884

2026

def __init__(self, server_address, RequestHandlerClass,

1885

2027

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

1886

gnutls_priority=None, use_dbus=True):

2028

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

1887

2029

self.enabled = False

1888

2030

self.clients = clients

1889

2031

if self.clients is None:

1893

2035

IPv6_TCPServer.__init__(self, server_address,

1894

2036

RequestHandlerClass,

1895

2037

interface = interface,

1896

use_ipv6 = use_ipv6)

2038

use_ipv6 = use_ipv6,

2039

socketfd = socketfd)

1897

2040

def server_activate(self):

1898

2041

if self.enabled:

1899

2042

return socketserver.TCPServer.server_activate(self)

1912

2055

1913

2056

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

1914

2057

proc = None, client_object=None):

1915

condition_names = {

1916

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

1917

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

1918

# blocking).

1919

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

1920

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

1921

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

1922

# broken, usually for pipes and

1923

# sockets).

1924

}

1925

conditions_string = ' | '.join(name

1926

for cond, name in

1927

condition_names.iteritems()

1928

if cond & condition)

1929

2058

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

1930

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

2059

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

1931

2060

# Wait for other process to exit

1932

2061

proc.join()

1933

2062

return False

1991

2120

return True

1992

2121

1993

2122

2123

def rfc3339_duration_to_delta(duration):

2124

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

2125

2126

>>> rfc3339_duration_to_delta("P7D")

2127

datetime.timedelta(7)

2128

>>> rfc3339_duration_to_delta("PT60S")

2129

datetime.timedelta(0, 60)

2130

>>> rfc3339_duration_to_delta("PT60M")

2131

datetime.timedelta(0, 3600)

2132

>>> rfc3339_duration_to_delta("PT24H")

2133

datetime.timedelta(1)

2134

>>> rfc3339_duration_to_delta("P1W")

2135

datetime.timedelta(7)

2136

>>> rfc3339_duration_to_delta("PT5M30S")

2137

datetime.timedelta(0, 330)

2138

>>> rfc3339_duration_to_delta("P1DT3M20S")

2139

datetime.timedelta(1, 200)

2140

"""

2141

2142

# Parsing an RFC 3339 duration with regular expressions is not

2143

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

2144

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

2145

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

2146

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

2147

# avoid excessive use of external libraries.

2148

2149

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

2150

Token = collections.namedtuple("Token",

2151

("regexp", # To match token; if

2152

# "value" is not None,

2153

# must have a "group"

2154

# containing digits

2155

"value", # datetime.timedelta or

2156

# None

2157

"followers")) # Tokens valid after

2158

# this token

2159

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

2160

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

2161

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

2162

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

2163

datetime.timedelta(seconds=1),

2164

frozenset((token_end,)))

2165

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

2166

datetime.timedelta(minutes=1),

2167

frozenset((token_second, token_end)))

2168

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

2169

datetime.timedelta(hours=1),

2170

frozenset((token_minute, token_end)))

2171

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

2172

None,

2173

frozenset((token_hour, token_minute,

2174

token_second)))

2175

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

2176

datetime.timedelta(days=1),

2177

frozenset((token_time, token_end)))

2178

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

2179

datetime.timedelta(weeks=4),

2180

frozenset((token_day, token_end)))

2181

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

2182

datetime.timedelta(weeks=52),

2183

frozenset((token_month, token_end)))

2184

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

2185

datetime.timedelta(weeks=1),

2186

frozenset((token_end,)))

2187

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

2188

frozenset((token_year, token_month,

2189

token_day, token_time,

2190

token_week))),

2191

# Define starting values

2192

value = datetime.timedelta() # Value so far

2193

found_token = None

2194

followers = frozenset(token_duration,) # Following valid tokens

2195

s = duration # String left to parse

2196

# Loop until end token is found

2197

while found_token is not token_end:

2198

# Search for any currently valid tokens

2199

for token in followers:

2200

match = token.regexp.match(s)

2201

if match is not None:

2202

# Token found

2203

if token.value is not None:

2204

# Value found, parse digits

2205

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

2206

# Add to value so far

2207

value += factor * token.value

2208

# Strip token from string

2209

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

2210

# Go to found token

2211

found_token = token

2212

# Set valid next tokens

2213

followers = found_token.followers

2214

break

2215

else:

2216

# No currently valid tokens were found

2217

raise ValueError("Invalid RFC 3339 duration")

2218

# End token found

2219

return value

2220

2221

1994

2222

def string_to_delta(interval):

1995

2223

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

1996

2224

2007

2235

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

2008

2236

datetime.timedelta(0, 330)

2009

2237

"""

2238

2239

try:

2240

return rfc3339_duration_to_delta(interval)

2241

except ValueError:

2242

pass

2243

2010

2244

timevalue = datetime.timedelta(0)

2011

2245

for s in interval.split():

2012

2246

try:

2023

2257

elif suffix == "w":

2024

2258

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

2025

2259

else:

2026

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

2027

except (ValueError, IndexError) as e:

2260

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

2261

.format(suffix))

2262

except IndexError as e:

2028

2263

raise ValueError(*(e.args))

2029

2264

timevalue += delta

2030

2265

return timevalue

2046

2281

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

2047

2282

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

2048

2283

raise OSError(errno.ENODEV,

2049

"%s not a character device"

2050

% os.devnull)

2284

"{0} not a character device"

2285

.format(os.devnull))

2051

2286

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

2052

2287

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

2053

2288

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

2062

2297

2063

2298

parser = argparse.ArgumentParser()

2064

2299

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

2065

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

2300

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

2066

2301

help="show version number and exit")

2067

2302

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

2068

2303

help="Bind to interface IF")

2074

2309

help="Run self-test")

2075

2310

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

2076

2311

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

2077

" to terminal")

2312

" to terminal", default=None)

2078

2313

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

2079

2314

help="Debug level for stdout output")

2080

2315

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

2087

2322

" files")

2088

2323

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

2089

2324

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

2090

" system bus interface")

2325

" system bus interface", default=None)

2091

2326

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

2092

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

2327

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

2328

default=None)

2093

2329

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

2094

2330

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

2095

" state")

2331

" state", default=None)

2332

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

2333

help="Specify a file descriptor to a network"

2334

" socket to use instead of creating one")

2096

2335

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

2097

2336

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

2337

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

2338

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

2098

2339

2099

2340

options = parser.parse_args()

2100

2341

2109

2350

"port": "",

2110

2351

"debug": "False",

2111

2352

"priority":

2112

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

2353

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

2113

2354

"servicename": "Mandos",

2114

2355

"use_dbus": "True",

2115

2356

"use_ipv6": "True",

2116

2357

"debuglevel": "",

2117

2358

"restore": "True",

2118

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

2359

"socket": "",

2360

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

2361

"foreground": "False",

2119

2362

}

2120

2363

2121

2364

# Parse config file for server-global settings

2126

2369

# Convert the SafeConfigParser object to a dict

2127

2370

server_settings = server_config.defaults()

2128

2371

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

2129

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

2372

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

2130

2373

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

2131

2374

option)

2132

2375

if server_settings["port"]:

2133

2376

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

2134

2377

"port")

2378

if server_settings["socket"]:

2379

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

2380

"socket")

2381

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

2382

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

2383

# happen with a supplied network socket.

2384

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

2385

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

2386

["socket"])

2135

2387

del server_config

2136

2388

2137

2389

# Override the settings from the config file with command line

2139

2391

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

2140

2392

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

2141

2393

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

2142

"statedir"):

2394

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

2143

2395

value = getattr(options, option)

2144

2396

if value is not None:

2145

2397

server_settings[option] = value

2148

2400

for option in server_settings.keys():

2149

2401

if type(server_settings[option]) is str:

2150

2402

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

2403

# Force all boolean options to be boolean

2404

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

2405

"foreground"):

2406

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

2407

# Debug implies foreground

2408

if server_settings["debug"]:

2409

server_settings["foreground"] = True

2151

2410

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

2152

2411

2153

2412

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

2159

2418

use_ipv6 = server_settings["use_ipv6"]

2160

2419

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

2161

2420

stored_state_file)

2421

foreground = server_settings["foreground"]

2162

2422

2163

2423

if debug:

2164

2424

initlogger(debug, logging.DEBUG)

2171

2431

2172

2432

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

2173

2433

syslogger.setFormatter(logging.Formatter

2174

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

2175

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

2176

% server_settings["servicename"]))

2434

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

2435

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

2436

.format(server_settings

2437

["servicename"])))

2177

2438

2178

2439

# Parse config file with clients

2179

2440

client_config = configparser.SafeConfigParser(Client

2192

2453

use_ipv6=use_ipv6,

2193

2454

gnutls_priority=

2194

2455

server_settings["priority"],

2195

use_dbus=use_dbus)

2196

if not debug:

2197

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

2456

use_dbus=use_dbus,

2457

socketfd=(server_settings["socket"]

2458

or None))

2459

if not foreground:

2460

pidfilename = "/run/mandos.pid"

2461

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

2462

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

2463

pidfile = None

2198

2464

try:

2199

2465

pidfile = open(pidfilename, "w")

2200

except IOError:

2201

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

2466

except IOError as e:

2467

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

2468

exc_info=e)

2202

2469

2203

try:

2204

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

2205

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

2206

except KeyError:

2470

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

2207

2471

try:

2208

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

2209

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

2472

uid = pwd.getpwnam(name).pw_uid

2473

gid = pwd.getpwnam(name).pw_gid

2474

break

2210

2475

except KeyError:

2211

try:

2212

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

2213

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

2214

except KeyError:

2215

uid = 65534

2216

gid = 65534

2476

continue

2477

else:

2478

uid = 65534

2479

gid = 65534

2217

2480

try:

2218

2481

os.setgid(gid)

2219

2482

os.setuid(uid)

2220

2483

except OSError as error:

2221

if error[0] != errno.EPERM:

2222

raise error

2484

if error.errno != errno.EPERM:

2485

raise

2223

2486

2224

2487

if debug:

2225

2488

# Enable all possible GnuTLS debugging

2242

2505

os.close(null)

2243

2506

2244

2507

# Need to fork before connecting to D-Bus

2245

if not debug:

2508

if not foreground:

2246

2509

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

2247

2510

daemon()

2248

2511

2512

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

2513

# need to inform gobject that threads will be used.

2249

2514

gobject.threads_init()

2250

2515

2251

2516

global main_loop

2262

2527

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

2263

2528

do_not_queue=True))

2264

2529

except dbus.exceptions.NameExistsException as e:

2265

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

2530

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

2266

2531

use_dbus = False

2267

2532

server_settings["use_dbus"] = False

2268

2533

tcp_server.use_dbus = False

2280

2545

2281

2546

client_class = Client

2282

2547

if use_dbus:

2283

client_class = functools.partial(ClientDBusTransitional,

2284

bus = bus)

2548

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

2285

2549

2286

2550

client_settings = Client.config_parser(client_config)

2287

2551

old_client_settings = {}

2288

2552

clients_data = {}

2289

2553

2554

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

2555

global wnull

2556

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

2557

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

2558

# mode

2559

if debug or not foreground:

2560

wnull.close()

2561

2290

2562

# Get client data and settings from last running state.

2291

2563

if server_settings["restore"]:

2292

2564

try:

2295

2567

(stored_state))

2296

2568

os.remove(stored_state_path)

2297

2569

except IOError as e:

2298

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

2299

.format(e))

2300

if e.errno != errno.ENOENT:

2570

if e.errno == errno.ENOENT:

2571

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

2572

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

2573

else:

2574

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

2575

exc_info=e)

2301

2576

raise

2302

2577

except EOFError as e:

2303

2578

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

2304

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

2579

"EOFError:", exc_info=e)

2305

2580

2306

2581

with PGPEngine() as pgp:

2307

2582

for client_name, client in clients_data.iteritems():

2583

# Skip removed clients

2584

if client_name not in client_settings:

2585

continue

2586

2308

2587

# Decide which value to use after restoring saved state.

2309

2588

# We have three different values: Old config file,

2310

2589

# new config file, and saved state.

2360

2639

.format(client_name))

2361

2640

client["secret"] = (

2362

2641

client_settings[client_name]["secret"])

2363

2364

2642

2365

2643

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

2366

2644

for client_name in (set(old_client_settings)

2369

2647

for client_name in (set(client_settings)

2370

2648

- set(old_client_settings)):

2371

2649

clients_data[client_name] = client_settings[client_name]

2372

2650

2373

2651

# Create all client objects

2374

2652

for client_name, client in clients_data.iteritems():

2375

2653

tcp_server.clients[client_name] = client_class(

2376

name = client_name, settings = client)

2654

name = client_name, settings = client,

2655

server_settings = server_settings)

2377

2656

2378

2657

if not tcp_server.clients:

2379

2658

logger.warning("No clients defined")

2380

2381

if not debug:

2382

try:

2383

with pidfile:

2384

pid = os.getpid()

2385

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

2386

del pidfile

2387

except IOError:

2388

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

2389

pidfilename, pid)

2390

except NameError:

2391

# "pidfile" was never created

2392

pass

2659

2660

if not foreground:

2661

if pidfile is not None:

2662

try:

2663

with pidfile:

2664

pid = os.getpid()

2665

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

2666

except IOError:

2667

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

2668

pidfilename, pid)

2669

del pidfile

2393

2670

del pidfilename

2394

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

2395

2671

2396

2672

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

2397

2673

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

2398

2674

2399

2675

if use_dbus:

2676

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

2677

"se.bsnet.fukt.Mandos"})

2400

2678

class MandosDBusService(DBusObjectWithProperties):

2401

2679

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

2402

2680

def __init__(self):

2456

2734

2457

2735

del _interface

2458

2736

2459

class MandosDBusServiceTransitional(MandosDBusService):

2460

__metaclass__ = AlternateDBusNamesMetaclass

2461

mandos_dbus_service = MandosDBusServiceTransitional()

2737

mandos_dbus_service = MandosDBusService()

2462

2738

2463

2739

def cleanup():

2464

2740

"Cleanup function; run on exit"

2465

2741

service.cleanup()

2466

2742

2467

2743

multiprocessing.active_children()

2744

wnull.close()

2468

2745

if not (tcp_server.clients or client_settings):

2469

2746

return

2470

2747

2482

2759

# A list of attributes that can not be pickled

2483

2760

# + secret.

2484

2761

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

2485

"checker"))

2762

"checker", "server_settings"))

2486

2763

for name, typ in (inspect.getmembers

2487

2764

(dbus.service.Object)):

2488

2765

exclude.add(name)

2497

2774

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

2498

2775

2499

2776

try:

2500

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

2501

prefix="clients-",

2502

dir=os.path.dirname

2503

(stored_state_path))

2504

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

2777

with (tempfile.NamedTemporaryFile

2778

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

2779

dir=os.path.dirname(stored_state_path),

2780

delete=False)) as stored_state:

2505

2781

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

2782

tempname=stored_state.name

2506

2783

os.rename(tempname, stored_state_path)

2507

2784

except (IOError, OSError) as e:

2508

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

2509

.format(e))

2510

2785

if not debug:

2511

2786

try:

2512

2787

os.remove(tempname)

2513

2788

except NameError:

2514

2789

pass

2515

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

2516

errno.EEXIST)):

2517

raise e

2790

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

2791

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

2792

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

2793

else:

2794

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

2795

exc_info=e)

2796

raise

2518

2797

2519

2798

# Delete all clients, and settings from config

2520

2799

while tcp_server.clients:

2547

2826

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

2548

2827

if use_ipv6:

2549

2828

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

2550

" flowinfo %d, scope_id %d"

2551

% tcp_server.socket.getsockname())

2829

" flowinfo %d, scope_id %d",

2830

*tcp_server.socket.getsockname())

2552

2831

else: # IPv4

2553

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

2554

% tcp_server.socket.getsockname())

2832

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

2833

*tcp_server.socket.getsockname())

2555

2834

2556

2835

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

2557

2836

2560

2839

try:

2561

2840

service.activate()

2562

2841

except dbus.exceptions.DBusException as error:

2563

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

2842

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

2564

2843

cleanup()

2565

2844

sys.exit(1)

2566

2845

# End of Avahi example code

2573

2852

logger.debug("Starting main loop")

2574

2853

main_loop.run()

2575

2854

except AvahiError as error:

2576

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

2855

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

2577

2856

cleanup()

2578

2857

sys.exit(1)

2579

2858

except KeyboardInterrupt: