/mandos/trunk : revision 518.2.3

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

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#

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# Everything else is

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#

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

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

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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import SocketServer as socketserver

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import socket

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import argparse

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import types

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import binascii

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import tempfile

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import itertools

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import dbus

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import dbus.service

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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 = "1.4.1"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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return interface_index

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

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def initlogger(level=logging.WARNING):

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"""init logger and add loglevel"""

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syslogger.setFormatter(logging.Formatter

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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console.setFormatter(logging.Formatter('%(asctime)s %(name)s'

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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console = logging.StreamHandler()

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console.setFormatter(logging.Formatter('%(asctime)s %(name)s'

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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"""Exception if encryption/decryption fails"""

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class CryptoError(Exception):

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pass

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class PGPEngine(object):

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class Crypto(object):

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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self.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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'--quiet'])

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def __enter__(self):

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return self

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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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with open(os.devnull) as devnull:

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try:

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

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

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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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raise CryptoError(e)

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self.gnupg.passphrase = None

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return ciphertext

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def decrypt(self, data, password):

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

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with open(os.devnull, "w") as devnull:

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with open(os.devnull) as devnull:

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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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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raise CryptoError(e)

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self.gnupg.passphrase = None

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return decrypted_plaintext

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class AvahiError(Exception):

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

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self.value = value

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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unicode(error))

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

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.format(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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def cleanup(self):

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

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if self.group is not None:

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pass

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self.group = None

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self.remove()

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

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

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

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

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else:

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

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def activate(self):

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

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if self.server is None:

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self.server_state_changed)

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

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class AvahiServiceToSyslog(AvahiService):

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def rename(self):

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

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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

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

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.format(self.name)))

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

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

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% self.name))

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return ret

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def timedelta_to_milliseconds(td):

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def _timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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class Client(object):

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

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Attributes:

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

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

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

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

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

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

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

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

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, -2 means no checker completed yet.

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checker, or None.

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

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

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D-Bus identifiers

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

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

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until this client is disabled

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extended_timeout: extra long timeout when secret has been sent

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extended_timeout: extra long timeout when password has been sent

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runtime_expansions: Allowed attributes for runtime expansion.

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

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disabled, or None

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

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

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

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

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"extended_timeout": "15m",

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"interval": "2m",

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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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"approved_by_default": "True",

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"enabled": "True",

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}

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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.timeout)

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return _timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.extended_timeout)

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return _timedelta_to_milliseconds(self.extended_timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return timedelta_to_milliseconds(self.interval)

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return _timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

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

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

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with exceptions for any special settings as defined above.

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

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value given the same arguments.

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"""

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settings = {}

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for client_name in config.sections():

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section = dict(config.items(client_name))

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client = settings[client_name] = {}

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

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# Reformat values from string types to Python types

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client["approved_by_default"] = config.getboolean(

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client_name, "approved_by_default")

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

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"enabled")

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

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.replace(" ", ""))

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if "secret" in section:

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

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elif "secfile" in section:

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

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(section["secfile"])),

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"rb") as secfile:

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

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else:

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

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.format(section))

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

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client["extended_timeout"] = string_to_delta(

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section["extended_timeout"])

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

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client["approval_delay"] = string_to_delta(

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section["approval_delay"])

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client["approval_duration"] = string_to_delta(

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section["approval_duration"])

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

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client["last_approval_request"] = None

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client["last_checked_ok"] = None

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client["last_checker_status"] = -2

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return settings

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

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return _timedelta_to_milliseconds(self.approval_delay)

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

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

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

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attribute."""

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self.name = name

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# adding all client settings

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for setting, value in settings.iteritems():

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setattr(self, setting, value)

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if self.enabled:

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if not hasattr(self, "last_enabled"):

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self.last_enabled = datetime.datetime.utcnow()

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if not hasattr(self, "expires"):

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

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+ self.timeout)

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else:

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self.last_enabled = None

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self.expires = None

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if config is None:

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config = {}

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

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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the fingerprint()

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# function

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

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.replace(" ", ""))

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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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if "secret" in config:

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

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elif "secfile" in config:

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

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(config["secfile"])),

469

"rb") as secfile:

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self.secret = secfile.read()

471

else:

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

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% self.name)

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

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self.created = datetime.datetime.utcnow()

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

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self.last_approval_request = None

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if self.enabled:

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self.last_enabled = datetime.datetime.utcnow()

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else:

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self.last_enabled = None

482

self.last_checked_ok = None

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self.last_checker_status = None

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

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self.extended_timeout = string_to_delta(config

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["extended_timeout"])

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

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self.checker = None

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self.checker_initiator_tag = None

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self.disable_initiator_tag = None

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if self.enabled:

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

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else:

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self.expires = None

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self.checker_callback_tag = None

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self.checker_command = config["checker"]

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self.current_checker_command = None

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self.approved = None

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self._approved = None

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

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True)

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self.approvals_pending = 0

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self.approval_delay = string_to_delta(

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config["approval_delay"])

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self.approval_duration = string_to_delta(

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config["approval_duration"])

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self.changedstate = (multiprocessing_manager

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.Condition(multiprocessing_manager

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.Lock()))

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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

579

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self.enabled = True

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self.last_enabled = datetime.datetime.utcnow()

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self.init_checker()

582

self.send_changedstate()

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def disable(self, quiet=True):

585

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"""Disable this client."""

586

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

587

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return False

588

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if not quiet:

542

self.send_changedstate()

543

if not quiet:

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

590

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

545

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

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gobject.source_remove(self.disable_initiator_tag)

592

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self.disable_initiator_tag = None

593

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self.expires = None

594

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

549

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

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gobject.source_remove(self.checker_initiator_tag)

596

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self.checker_initiator_tag = None

597

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self.stop_checker()

598

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self.enabled = False

599

if not quiet:

600

self.send_changedstate()

601

554

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

602

555

return False

603

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607

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def init_checker(self):

608

561

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

609

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# and every interval from then on.

610

if self.checker_initiator_tag is not None:

611

gobject.source_remove(self.checker_initiator_tag)

612

563

self.checker_initiator_tag = (gobject.timeout_add

613

564

(self.interval_milliseconds(),

614

565

self.start_checker))

615

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

616

if self.disable_initiator_tag is not None:

617

gobject.source_remove(self.disable_initiator_tag)

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567

self.disable_initiator_tag = (gobject.timeout_add

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(self.timeout_milliseconds(),

620

569

self.disable))

626

575

self.checker_callback_tag = None

627

576

self.checker = None

628

577

if os.WIFEXITED(condition):

629

self.last_checker_status = os.WEXITSTATUS(condition)

578

self.last_checker_status = os.WEXITSTATUS(condition)

630

579

if self.last_checker_status == 0:

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580

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

632

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vars(self))

639

588

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

640

589

vars(self))

641

590

642

def checked_ok(self):

643

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

644

self.last_checked_ok = datetime.datetime.utcnow()

645

self.last_checker_status = 0

646

self.bump_timeout()

647

648

def bump_timeout(self, timeout=None):

649

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

591

def checked_ok(self, timeout=None):

592

"""Bump up the timeout for this client.

593

594

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

595

alive and well.

596

"""

650

597

if timeout is None:

651

598

timeout = self.timeout

599

self.last_checked_ok = datetime.datetime.utcnow()

652

600

if self.disable_initiator_tag is not None:

653

601

gobject.source_remove(self.disable_initiator_tag)

654

self.disable_initiator_tag = None

655

602

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

656

603

self.disable_initiator_tag = (gobject.timeout_add

657

(timedelta_to_milliseconds

604

(_timedelta_to_milliseconds

658

605

(timeout), self.disable))

659

606

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

660

607

667

614

If a checker already exists, leave it running and do

668

615

nothing."""

669

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

670

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

671

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

672

# would inevitably timeout, since no checker would get a

673

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

617

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

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

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# client would inevitably timeout, since no checker would get

620

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

674

621

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

675

622

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

676

623

# should be.

706

653

try:

707

654

command = self.checker_command % escaped_attrs

708

655

except TypeError as error:

709

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

710

self.checker_command, exc_info=error)

656

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

657

' %s', self.checker_command, error)

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658

return True # Try again later

712

659

self.current_checker_command = command

713

660

try:

731

678

gobject.source_remove(self.checker_callback_tag)

732

679

self.checker_callback(pid, status, command)

733

680

except OSError as error:

734

logger.error("Failed to start subprocess",

735

exc_info=error)

681

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

682

error)

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683

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

737

684

return True

738

685

745

692

return

746

693

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

747

694

try:

748

self.checker.terminate()

695

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

749

696

#time.sleep(0.5)

750

697

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

751

# self.checker.kill()

698

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

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699

except OSError as error:

753

700

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

754

701

raise

771

718

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

772

719

if byte_arrays and signature != "ay":

773

720

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

774

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

721

" signature %r" % signature)

775

722

def decorator(func):

776

723

func._dbus_is_property = True

777

724

func._dbus_interface = dbus_interface

785

732

return decorator

786

733

787

734

788

def dbus_interface_annotations(dbus_interface):

789

"""Decorator for marking functions returning interface annotations

790

791

Usage:

792

793

@dbus_interface_annotations("org.example.Interface")

794

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

795

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

796

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

797

"false"}

798

"""

799

def decorator(func):

800

func._dbus_is_interface = True

801

func._dbus_interface = dbus_interface

802

func._dbus_name = dbus_interface

803

return func

804

return decorator

805

806

807

def dbus_annotations(annotations):

808

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

809

Usage:

810

811

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

812

access="r")

813

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

814

"org.freedesktop.DBus.Property."

815

"EmitsChangedSignal": "false"})

816

def Property_dbus_property(self):

817

return dbus.Boolean(False)

818

"""

819

def decorator(func):

820

func._dbus_annotations = annotations

821

return func

822

return decorator

823

824

825

735

class DBusPropertyException(dbus.exceptions.DBusException):

826

736

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

827

737

"""

850

760

"""

851

761

852

762

@staticmethod

853

def _is_dbus_thing(thing):

854

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

855

856

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

857

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

858

"""

859

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

860

False)

763

def _is_dbus_property(obj):

764

return getattr(obj, "_dbus_is_property", False)

861

765

862

def _get_all_dbus_things(self, thing):

766

def _get_all_dbus_properties(self):

863

767

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

864

768

"""

865

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

866

name),

867

athing.__get__(self))

769

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

868

770

for cls in self.__class__.__mro__

869

for name, athing in

870

inspect.getmembers(cls,

871

self._is_dbus_thing(thing)))

771

for name, prop in

772

inspect.getmembers(cls, self._is_dbus_property))

872

773

873

774

def _get_dbus_property(self, interface_name, property_name):

874

775

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

876

777

"""

877

778

for cls in self.__class__.__mro__:

878

779

for name, value in (inspect.getmembers

879

(cls,

880

self._is_dbus_thing("property"))):

780

(cls, self._is_dbus_property)):

881

781

if (value._dbus_name == property_name

882

782

and value._dbus_interface == interface_name):

883

783

return value.__get__(self)

912

812

# signatures other than "ay".

913

813

if prop._dbus_signature != "ay":

914

814

raise ValueError

915

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

916

for byte in value))

815

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

816

for byte in value))

917

817

prop(value)

918

818

919

819

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

925

825

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

926

826

"""

927

827

properties = {}

928

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

828

for name, prop in self._get_all_dbus_properties():

929

829

if (interface_name

930

830

and interface_name != prop._dbus_interface):

931

831

# Interface non-empty but did not match

946

846

path_keyword='object_path',

947

847

connection_keyword='connection')

948

848

def Introspect(self, object_path, connection):

949

"""Overloading of standard D-Bus method.

950

951

Inserts property tags and interface annotation tags.

849

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

952

850

"""

953

851

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

954

852

connection)

961

859

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

962

860

return e

963

861

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

964

# Add property tags

965

862

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

966

863

for name, prop

967

in self._get_all_dbus_things("property")

864

in self._get_all_dbus_properties()

968

865

if prop._dbus_interface

969

866

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

970

867

if_tag.appendChild(tag)

971

# Add annotation tags

972

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

973

for tag in if_tag.getElementsByTagName(typ):

974

annots = dict()

975

for name, prop in (self.

976

_get_all_dbus_things(typ)):

977

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

978

and prop._dbus_interface

979

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

980

annots.update(getattr

981

(prop,

982

"_dbus_annotations",

983

{}))

984

for name, value in annots.iteritems():

985

ann_tag = document.createElement(

986

"annotation")

987

ann_tag.setAttribute("name", name)

988

ann_tag.setAttribute("value", value)

989

tag.appendChild(ann_tag)

990

# Add interface annotation tags

991

for annotation, value in dict(

992

itertools.chain.from_iterable(

993

annotations().iteritems()

994

for name, annotations in

995

self._get_all_dbus_things("interface")

996

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

997

)).iteritems():

998

ann_tag = document.createElement("annotation")

999

ann_tag.setAttribute("name", annotation)

1000

ann_tag.setAttribute("value", value)

1001

if_tag.appendChild(ann_tag)

1002

868

# Add the names to the return values for the

1003

869

# "org.freedesktop.DBus.Properties" methods

1004

870

if (if_tag.getAttribute("name")

1019

885

except (AttributeError, xml.dom.DOMException,

1020

886

xml.parsers.expat.ExpatError) as error:

1021

887

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

1022

exc_info=error)

888

error)

1023

889

return xmlstring

1024

890

1025

891

1031

897

variant_level=variant_level)

1032

898

1033

899

1034

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1035

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

1036

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

1037

interface names according to the "alt_interface_names" mapping.

1038

Usage:

1039

1040

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

1041

"net.example.AlternateInterface"})

1042

class SampleDBusObject(dbus.service.Object):

1043

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

1044

def SampleDBusMethod():

1045

pass

1046

1047

The above "SampleDBusMethod" on "SampleDBusObject" will be

1048

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

1049

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

1050

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

1051

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

1052

1053

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

1054

(from DBusObjectWithProperties) and interfaces (from the

1055

dbus_interface_annotations decorator).

900

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

901

.__metaclass__):

902

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

903

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

1056

904

"""

1057

def wrapper(cls):

1058

for orig_interface_name, alt_interface_name in (

1059

alt_interface_names.iteritems()):

1060

attr = {}

1061

interface_names = set()

1062

# Go though all attributes of the class

1063

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

905

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

906

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

907

# methods, signals, or properties in them

908

for base in (b for b in bases

909

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

910

# Go though all attributes of the base class

911

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

1064

912

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

1065

913

# with the wrong interface name

1066

914

if (not hasattr(attribute, "_dbus_interface")

1067

915

or not attribute._dbus_interface

1068

.startswith(orig_interface_name)):

916

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

1069

917

continue

1070

918

# Create an alternate D-Bus interface name based on

1071

919

# the current name

1072

920

alt_interface = (attribute._dbus_interface

1073

.replace(orig_interface_name,

1074

alt_interface_name))

1075

interface_names.add(alt_interface)

921

.replace("se.recompile.Mandos",

922

"se.bsnet.fukt.Mandos"))

1076

923

# Is this a D-Bus signal?

1077

924

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

1078

925

# Extract the original non-method function by

1093

940

nonmethod_func.func_name,

1094

941

nonmethod_func.func_defaults,

1095

942

nonmethod_func.func_closure)))

1096

# Copy annotations, if any

1097

try:

1098

new_function._dbus_annotations = (

1099

dict(attribute._dbus_annotations))

1100

except AttributeError:

1101

pass

1102

943

# Define a creator of a function to call both the

1103

# original and alternate functions, so both the

1104

# original and alternate signals gets sent when

1105

# the function is called

944

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

945

# signals gets sent when the function is called

1106

946

def fixscope(func1, func2):

1107

947

"""This function is a scope container to pass

1108

948

func1 and func2 to the "call_both" function

1115

955

return call_both

1116

956

# Create the "call_both" function and add it to

1117

957

# the class

1118

attr[attrname] = fixscope(attribute, new_function)

958

attr[attrname] = fixscope(attribute,

959

new_function)

1119

960

# Is this a D-Bus method?

1120

961

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

1121

962

# Create a new, but exactly alike, function

1132

973

attribute.func_name,

1133

974

attribute.func_defaults,

1134

975

attribute.func_closure)))

1135

# Copy annotations, if any

1136

try:

1137

attr[attrname]._dbus_annotations = (

1138

dict(attribute._dbus_annotations))

1139

except AttributeError:

1140

pass

1141

976

# Is this a D-Bus property?

1142

977

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

1143

978

# Create a new, but exactly alike, function

1157

992

attribute.func_name,

1158

993

attribute.func_defaults,

1159

994

attribute.func_closure)))

1160

# Copy annotations, if any

1161

try:

1162

attr[attrname]._dbus_annotations = (

1163

dict(attribute._dbus_annotations))

1164

except AttributeError:

1165

pass

1166

# Is this a D-Bus interface?

1167

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

1168

# Create a new, but exactly alike, function

1169

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

1170

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

1171

# to the class.

1172

attr[attrname] = (dbus_interface_annotations

1173

(alt_interface)

1174

(types.FunctionType

1175

(attribute.func_code,

1176

attribute.func_globals,

1177

attribute.func_name,

1178

attribute.func_defaults,

1179

attribute.func_closure)))

1180

if deprecate:

1181

# Deprecate all alternate interfaces

1182

iname="_AlternateDBusNames_interface_annotation{0}"

1183

for interface_name in interface_names:

1184

@dbus_interface_annotations(interface_name)

1185

def func(self):

1186

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

1187

"true" }

1188

# Find an unused name

1189

for aname in (iname.format(i)

1190

for i in itertools.count()):

1191

if aname not in attr:

1192

attr[aname] = func

1193

break

1194

if interface_names:

1195

# Replace the class with a new subclass of it with

1196

# methods, signals, etc. as created above.

1197

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

1198

(cls,), attr)

1199

return cls

1200

return wrapper

1201

1202

1203

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

1204

"se.bsnet.fukt.Mandos"})

995

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

996

997

1205

998

class ClientDBus(Client, DBusObjectWithProperties):

1206

999

"""A Client class using D-Bus

1207

1000

1218

1011

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

1219

1012

self.bus = bus

1220

1013

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

1014

1015

self._approvals_pending = 0

1221

1016

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

1222

1017

# the D-Bus

1223

1018

client_object_name = unicode(self.name).translate(

1227

1022

("/clients/" + client_object_name))

1228

1023

DBusObjectWithProperties.__init__(self, self.bus,

1229

1024

self.dbus_object_path)

1230

1025

1231

1026

def notifychangeproperty(transform_func,

1232

1027

dbus_name, type_func=lambda x: x,

1233

1028

variant_level=1):

1256

1051

1257

1052

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

1258

1053

1054

1259

1055

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1260

1056

approvals_pending = notifychangeproperty(dbus.Boolean,

1261

1057

"ApprovalPending",

1268

1064

checker is not None)

1269

1065

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1270

1066

"LastCheckedOK")

1271

last_checker_status = notifychangeproperty(dbus.Int16,

1272

"LastCheckerStatus")

1273

1067

last_approval_request = notifychangeproperty(

1274

1068

datetime_to_dbus, "LastApprovalRequest")

1275

1069

approved_by_default = notifychangeproperty(dbus.Boolean,

1276

1070

"ApprovedByDefault")

1277

approval_delay = notifychangeproperty(dbus.UInt64,

1071

approval_delay = notifychangeproperty(dbus.UInt16,

1278

1072

"ApprovalDelay",

1279

1073

type_func =

1280

timedelta_to_milliseconds)

1074

_timedelta_to_milliseconds)

1281

1075

approval_duration = notifychangeproperty(

1282

dbus.UInt64, "ApprovalDuration",

1283

type_func = timedelta_to_milliseconds)

1076

dbus.UInt16, "ApprovalDuration",

1077

type_func = _timedelta_to_milliseconds)

1284

1078

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

1285

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

1079

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

1286

1080

type_func =

1287

timedelta_to_milliseconds)

1081

_timedelta_to_milliseconds)

1288

1082

extended_timeout = notifychangeproperty(

1289

dbus.UInt64, "ExtendedTimeout",

1290

type_func = timedelta_to_milliseconds)

1291

interval = notifychangeproperty(dbus.UInt64,

1083

dbus.UInt16, "ExtendedTimeout",

1084

type_func = _timedelta_to_milliseconds)

1085

interval = notifychangeproperty(dbus.UInt16,

1292

1086

"Interval",

1293

1087

type_func =

1294

timedelta_to_milliseconds)

1088

_timedelta_to_milliseconds)

1295

1089

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

1296

1090

1297

1091

del notifychangeproperty

1339

1133

return r

1340

1134

1341

1135

def _reset_approved(self):

1342

self.approved = None

1136

self._approved = None

1343

1137

return False

1344

1138

1345

1139

def approve(self, value=True):

1346

self.approved = value

1347

gobject.timeout_add(timedelta_to_milliseconds

1140

self.send_changedstate()

1141

self._approved = value

1142

gobject.timeout_add(_timedelta_to_milliseconds

1348

1143

(self.approval_duration),

1349

1144

self._reset_approved)

1350

self.send_changedstate()

1145

1351

1146

1352

1147

## D-Bus methods, signals & properties

1353

1148

_interface = "se.recompile.Mandos.Client"

1354

1149

1355

## Interfaces

1356

1357

@dbus_interface_annotations(_interface)

1358

def _foo(self):

1359

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

1360

"false"}

1361

1362

1150

## Signals

1363

1151

1364

1152

# CheckerCompleted - signal

1400

1188

"D-Bus signal"

1401

1189

return self.need_approval()

1402

1190

1191

# NeRwequest - signal

1192

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

1193

def NewRequest(self, ip):

1194

"""D-Bus signal

1195

Is sent after a client request a password.

1196

"""

1197

pass

1198

1403

1199

## Methods

1404

1200

1405

1201

# Approve - method

1463

1259

access="readwrite")

1464

1260

def ApprovalDuration_dbus_property(self, value=None):

1465

1261

if value is None: # get

1466

return dbus.UInt64(timedelta_to_milliseconds(

1262

return dbus.UInt64(_timedelta_to_milliseconds(

1467

1263

self.approval_duration))

1468

1264

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

1469

1265

1483

1279

def Host_dbus_property(self, value=None):

1484

1280

if value is None: # get

1485

1281

return dbus.String(self.host)

1486

self.host = unicode(value)

1282

self.host = value

1487

1283

1488

1284

# Created - property

1489

1285

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

1515

1311

return

1516

1312

return datetime_to_dbus(self.last_checked_ok)

1517

1313

1518

# LastCheckerStatus - property

1519

@dbus_service_property(_interface, signature="n",

1520

access="read")

1521

def LastCheckerStatus_dbus_property(self):

1522

return dbus.Int16(self.last_checker_status)

1523

1524

1314

# Expires - property

1525

1315

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

1526

1316

def Expires_dbus_property(self):

1537

1327

def Timeout_dbus_property(self, value=None):

1538

1328

if value is None: # get

1539

1329

return dbus.UInt64(self.timeout_milliseconds())

1540

old_timeout = self.timeout

1541

1330

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

1542

# Reschedule disabling

1543

if self.enabled:

1544

now = datetime.datetime.utcnow()

1545

self.expires += self.timeout - old_timeout

1546

if self.expires <= now:

1547

# The timeout has passed

1548

self.disable()

1549

else:

1550

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

1551

is None):

1552

return

1553

gobject.source_remove(self.disable_initiator_tag)

1554

self.disable_initiator_tag = (

1555

gobject.timeout_add(

1556

timedelta_to_milliseconds(self.expires - now),

1557

self.disable))

1331

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

1332

return

1333

# Reschedule timeout

1334

gobject.source_remove(self.disable_initiator_tag)

1335

self.disable_initiator_tag = None

1336

self.expires = None

1337

time_to_die = _timedelta_to_milliseconds((self

1338

.last_checked_ok

1339

+ self.timeout)

1340

- datetime.datetime

1341

.utcnow())

1342

if time_to_die <= 0:

1343

# The timeout has passed

1344

self.disable()

1345

else:

1346

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

1347

+ datetime.timedelta(milliseconds =

1348

time_to_die))

1349

self.disable_initiator_tag = (gobject.timeout_add

1350

(time_to_die, self.disable))

1558

1351

1559

1352

# ExtendedTimeout - property

1560

1353

@dbus_service_property(_interface, signature="t",

1586

1379

def Checker_dbus_property(self, value=None):

1587

1380

if value is None: # get

1588

1381

return dbus.String(self.checker_command)

1589

self.checker_command = unicode(value)

1382

self.checker_command = value

1590

1383

1591

1384

# CheckerRunning - property

1592

1385

@dbus_service_property(_interface, signature="b",

1621

1414

raise KeyError()

1622

1415

1623

1416

def __getattribute__(self, name):

1624

if name == '_pipe':

1417

if(name == '_pipe'):

1625

1418

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

1626

1419

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

1627

1420

data = self._pipe.recv()

1634

1427

return func

1635

1428

1636

1429

def __setattr__(self, name, value):

1637

if name == '_pipe':

1430

if(name == '_pipe'):

1638

1431

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

1639

1432

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

1640

1433

1641

1434

1435

class ClientDBusTransitional(ClientDBus):

1436

__metaclass__ = AlternateDBusNamesMetaclass

1437

1438

1642

1439

class ClientHandler(socketserver.BaseRequestHandler, object):

1643

1440

"""A class to handle client connections.

1644

1441

1705

1502

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

1706

1503

return

1707

1504

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

1505

if self.server.use_dbus:

1506

# Emit D-Bus signal

1507

client.NewRequest(str(self.client_address))

1708

1508

1709

1509

try:

1710

1510

client = ProxyClient(child_pipe, fpr,

1726

1526

client.Rejected("Disabled")

1727

1527

return

1728

1528

1729

if client.approved or not client.approval_delay:

1529

if client._approved or not client.approval_delay:

1730

1530

#We are approved or approval is disabled

1731

1531

break

1732

elif client.approved is None:

1532

elif client._approved is None:

1733

1533

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

1734

1534

client.name)

1735

1535

if self.server.use_dbus:

1748

1548

#wait until timeout or approved

1749

1549

time = datetime.datetime.now()

1750

1550

client.changedstate.acquire()

1751

client.changedstate.wait(

1752

float(timedelta_to_milliseconds(delay)

1753

/ 1000))

1551

(client.changedstate.wait

1552

(float(client._timedelta_to_milliseconds(delay)

1553

/ 1000)))

1754

1554

client.changedstate.release()

1755

1555

time2 = datetime.datetime.now()

1756

1556

if (time2 - time) >= delay:

1772

1572

try:

1773

1573

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

1774

1574

except gnutls.errors.GNUTLSError as error:

1775

logger.warning("gnutls send failed",

1776

exc_info=error)

1575

logger.warning("gnutls send failed")

1777

1576

return

1778

1577

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

1779

1578

sent, len(client.secret)

1782

1581

1783

1582

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

1784

1583

# bump the timeout using extended_timeout

1785

client.bump_timeout(client.extended_timeout)

1584

client.checked_ok(client.extended_timeout)

1786

1585

if self.server.use_dbus:

1787

1586

# Emit D-Bus signal

1788

1587

client.GotSecret()

1793

1592

try:

1794

1593

session.bye()

1795

1594

except gnutls.errors.GNUTLSError as error:

1796

logger.warning("GnuTLS bye failed",

1797

exc_info=error)

1595

logger.warning("GnuTLS bye failed")

1798

1596

1799

1597

@staticmethod

1800

1598

def peer_certificate(session):

1865

1663

def sub_process_main(self, request, address):

1866

1664

try:

1867

1665

self.finish_request(request, address)

1868

except Exception:

1666

except:

1869

1667

self.handle_error(request, address)

1870

1668

self.close_request(request)

1871

1669

1872

1670

def process_request(self, request, address):

1873

1671

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

1874

1672

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

1875

args = (request, address))

1673

args = (request,

1674

address))

1876

1675

proc.start()

1877

1676

return proc

1878

1677

1928

1727

str(self.interface

1929

1728

+ '\0'))

1930

1729

except socket.error as error:

1931

if error.errno == errno.EPERM:

1730

if error[0] == errno.EPERM:

1932

1731

logger.error("No permission to"

1933

1732

" bind to interface %s",

1934

1733

self.interface)

1935

elif error.errno == errno.ENOPROTOOPT:

1734

elif error[0] == errno.ENOPROTOOPT:

1936

1735

logger.error("SO_BINDTODEVICE not available;"

1937

1736

" cannot bind to interface %s",

1938

1737

self.interface)

1939

elif error.errno == errno.ENODEV:

1940

logger.error("Interface %s does not"

1941

" exist, cannot bind",

1942

self.interface)

1943

1738

else:

1944

1739

raise

1945

1740

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

2004

1799

2005

1800

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

2006

1801

proc = None, client_object=None):

1802

condition_names = {

1803

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

1804

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

1805

# blocking).

1806

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

1807

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

1808

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

1809

# broken, usually for pipes and

1810

# sockets).

1811

}

1812

conditions_string = ' | '.join(name

1813

for cond, name in

1814

condition_names.iteritems()

1815

if cond & condition)

2007

1816

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

2008

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

1817

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

2009

1818

# Wait for other process to exit

2010

1819

proc.join()

2011

1820

return False

2101

1910

elif suffix == "w":

2102

1911

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

2103

1912

else:

2104

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

2105

.format(suffix))

1913

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

2106

1914

except (ValueError, IndexError) as e:

2107

1915

raise ValueError(*(e.args))

2108

1916

timevalue += delta

2122

1930

sys.exit()

2123

1931

if not noclose:

2124

1932

# Close all standard open file descriptors

2125

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

1933

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

2126

1934

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

2127

1935

raise OSError(errno.ENODEV,

2128

"{0} not a character device"

2129

.format(os.devnull))

1936

"%s not a character device"

1937

% os.path.devnull)

2130

1938

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

2131

1939

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

2132

1940

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

2141

1949

2142

1950

parser = argparse.ArgumentParser()

2143

1951

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

2144

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

1952

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

2145

1953

help="show version number and exit")

2146

1954

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

2147

1955

help="Bind to interface IF")

2240

2048

stored_state_file)

2241

2049

2242

2050

if debug:

2243

initlogger(debug, logging.DEBUG)

2051

initlogger(logging.DEBUG)

2244

2052

else:

2245

2053

if not debuglevel:

2246

initlogger(debug)

2054

initlogger()

2247

2055

else:

2248

2056

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

2249

initlogger(debug, level)

2057

initlogger(level)

2250

2058

2251

2059

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

2252

2060

syslogger.setFormatter(logging.Formatter

2253

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

2254

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

2255

.format(server_settings

2256

["servicename"])))

2061

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

2062

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

2063

% server_settings["servicename"]))

2257

2064

2258

2065

# Parse config file with clients

2259

client_config = configparser.SafeConfigParser(Client

2260

.client_defaults)

2066

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

2067

"extended_timeout": "15m",

2068

"interval": "2m",

2069

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

2070

"host": "",

2071

"approval_delay": "0s",

2072

"approval_duration": "1s",

2073

}

2074

client_config = configparser.SafeConfigParser(client_defaults)

2261

2075

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

2262

2076

"clients.conf"))

2263

2077

2277

2091

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

2278

2092

try:

2279

2093

pidfile = open(pidfilename, "w")

2280

except IOError as e:

2281

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

2282

exc_info=e)

2094

except IOError:

2095

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

2283

2096

2284

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

2097

try:

2098

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

2099

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

2100

except KeyError:

2285

2101

try:

2286

uid = pwd.getpwnam(name).pw_uid

2287

gid = pwd.getpwnam(name).pw_gid

2288

break

2102

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

2103

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

2289

2104

except KeyError:

2290

continue

2291

else:

2292

uid = 65534

2293

gid = 65534

2105

try:

2106

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

2107

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

2108

except KeyError:

2109

uid = 65534

2110

gid = 65534

2294

2111

try:

2295

2112

os.setgid(gid)

2296

2113

os.setuid(uid)

2313

2130

.gnutls_global_set_log_function(debug_gnutls))

2314

2131

2315

2132

# Redirect stdin so all checkers get /dev/null

2316

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

2133

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

2317

2134

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

2318

2135

if null > 2:

2319

2136

os.close(null)

2137

else:

2138

# No console logging

2139

logger.removeHandler(console)

2320

2140

2321

2141

# Need to fork before connecting to D-Bus

2322

2142

if not debug:

2323

2143

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

2324

2144

daemon()

2325

2145

2326

gobject.threads_init()

2327

2328

2146

global main_loop

2329

2147

# From the Avahi example code

2330

DBusGMainLoop(set_as_default=True)

2148

DBusGMainLoop(set_as_default=True )

2331

2149

main_loop = gobject.MainLoop()

2332

2150

bus = dbus.SystemBus()

2333

2151

# End of Avahi example code

2339

2157

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

2340

2158

do_not_queue=True))

2341

2159

except dbus.exceptions.NameExistsException as e:

2342

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

2160

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

2343

2161

use_dbus = False

2344

2162

server_settings["use_dbus"] = False

2345

2163

tcp_server.use_dbus = False

2357

2175

2358

2176

client_class = Client

2359

2177

if use_dbus:

2360

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

2361

2362

client_settings = Client.config_parser(client_config)

2178

client_class = functools.partial(ClientDBusTransitional,

2179

bus = bus)

2180

2181

special_settings = {

2182

# Some settings need to be accessd by special methods;

2183

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

2184

"approved_by_default":

2185

lambda section:

2186

client_config.getboolean(section, "approved_by_default"),

2187

"enabled":

2188

lambda section:

2189

client_config.getboolean(section, "enabled"),

2190

}

2191

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

2192

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

2193

# with exceptions for any special settings as defined above

2194

client_settings = dict((clientname,

2195

dict((setting,

2196

(value

2197

if setting not in special_settings

2198

else special_settings[setting]

2199

(clientname)))

2200

for setting, value in

2201

client_config.items(clientname)))

2202

for clientname in client_config.sections())

2203

2363

2204

old_client_settings = {}

2364

clients_data = {}

2205

clients_data = []

2365

2206

2366

2207

# Get client data and settings from last running state.

2367

2208

if server_settings["restore"]:

2371

2212

(stored_state))

2372

2213

os.remove(stored_state_path)

2373

2214

except IOError as e:

2374

if e.errno == errno.ENOENT:

2375

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

2376

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

2377

else:

2378

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

2379

exc_info=e)

2215

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

2216

.format(e))

2217

if e.errno != errno.ENOENT:

2380

2218

raise

2381

except EOFError as e:

2382

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

2383

"EOFError:", exc_info=e)

2384

2219

2385

with PGPEngine() as pgp:

2386

for client_name, client in clients_data.iteritems():

2220

with Crypto() as crypt:

2221

for client in clients_data:

2222

client_name = client["name"]

2223

2387

2224

# Decide which value to use after restoring saved state.

2388

2225

# We have three different values: Old config file,

2389

2226

# new config file, and saved state.

2397

2234

if (name != "secret" and

2398

2235

value != old_client_settings[client_name]

2399

2236

[name]):

2400

client[name] = value

2237

setattr(client, name, value)

2401

2238

except KeyError:

2402

2239

pass

2403

2240

2404

2241

# Clients who has passed its expire date can still be

2405

# enabled if its last checker was successful. Clients

2406

# whose checker succeeded before we stored its state is

2407

# assumed to have successfully run all checkers during

2408

# downtime.

2409

if client["enabled"]:

2410

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

2411

if not client["last_checked_ok"]:

2412

logger.warning(

2413

"disabling client {0} - Client never "

2414

"performed a successful checker"

2415

.format(client_name))

2416

client["enabled"] = False

2417

elif client["last_checker_status"] != 0:

2418

logger.warning(

2419

"disabling client {0} - Client "

2420

"last checker failed with error code {1}"

2421

.format(client_name,

2422

client["last_checker_status"]))

2242

# enabled if its last checker was sucessful. Clients

2243

# whose checker failed before we stored its state is

2244

# assumed to have failed all checkers during downtime.

2245

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

2246

if ((datetime.datetime.utcnow()

2247

- client["last_checked_ok"])

2248

> client["interval"]):

2249

if client["last_checker_status"] != 0:

2423

2250

client["enabled"] = False

2424

2251

else:

2425

2252

client["expires"] = (datetime.datetime

2426

2253

.utcnow()

2427

2254

+ client["timeout"])

2428

logger.debug("Last checker succeeded,"

2429

" keeping {0} enabled"

2430

.format(client_name))

2255

2256

client["changedstate"] = (multiprocessing_manager

2257

.Condition

2258

(multiprocessing_manager

2259

.Lock()))

2260

if use_dbus:

2261

new_client = (ClientDBusTransitional.__new__

2262

(ClientDBusTransitional))

2263

tcp_server.clients[client_name] = new_client

2264

new_client.bus = bus

2265

for name, value in client.iteritems():

2266

setattr(new_client, name, value)

2267

client_object_name = unicode(client_name).translate(

2268

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

2269

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

2270

new_client.dbus_object_path = (dbus.ObjectPath

2271

("/clients/"

2272

+ client_object_name))

2273

DBusObjectWithProperties.__init__(new_client,

2274

new_client.bus,

2275

new_client

2276

.dbus_object_path)

2277

else:

2278

tcp_server.clients[client_name] = (Client.__new__

2279

(Client))

2280

for name, value in client.iteritems():

2281

setattr(tcp_server.clients[client_name],

2282

name, value)

2283

2431

2284

try:

2432

client["secret"] = (

2433

pgp.decrypt(client["encrypted_secret"],

2434

client_settings[client_name]

2435

["secret"]))

2436

except PGPError:

2285

tcp_server.clients[client_name].secret = (

2286

crypt.decrypt(tcp_server.clients[client_name]

2287

.encrypted_secret,

2288

client_settings[client_name]

2289

["secret"]))

2290

except CryptoError:

2437

2291

# If decryption fails, we use secret from new settings

2438

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

2439

.format(client_name))

2440

client["secret"] = (

2292

tcp_server.clients[client_name].secret = (

2441

2293

client_settings[client_name]["secret"])

2442

2294

2443

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

2444

for client_name in (set(old_client_settings)

2445

- set(client_settings)):

2446

del clients_data[client_name]

2447

for client_name in (set(client_settings)

2448

- set(old_client_settings)):

2449

clients_data[client_name] = client_settings[client_name]

2450

2451

# Create all client objects

2452

for client_name, client in clients_data.iteritems():

2453

tcp_server.clients[client_name] = client_class(

2454

name = client_name, settings = client)

2295

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

2296

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

2297

del tcp_server.clients[clientname]

2298

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

2299

tcp_server.clients[clientname] = (client_class(name

2300

= clientname,

2301

config =

2302

client_settings

2303

[clientname]))

2455

2304

2456

2305

if not tcp_server.clients:

2457

2306

logger.warning("No clients defined")

2458

2307

2459

2308

if not debug:

2460

2309

try:

2461

2310

with pidfile:

2469

2318

# "pidfile" was never created

2470

2319

pass

2471

2320

del pidfilename

2321

2472

2322

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

2473

2323

2474

2324

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

2475

2325

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

2476

2326

2477

2327

if use_dbus:

2478

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

2479

"se.bsnet.fukt.Mandos"})

2480

class MandosDBusService(DBusObjectWithProperties):

2328

class MandosDBusService(dbus.service.Object):

2481

2329

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

2482

2330

def __init__(self):

2483

2331

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

2484

2332

_interface = "se.recompile.Mandos"

2485

2333

2486

@dbus_interface_annotations(_interface)

2487

def _foo(self):

2488

return { "org.freedesktop.DBus.Property"

2489

".EmitsChangedSignal":

2490

"false"}

2491

2492

2334

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

2493

2335

def ClientAdded(self, objpath):

2494

2336

"D-Bus signal"

2536

2378

2537

2379

del _interface

2538

2380

2539

mandos_dbus_service = MandosDBusService()

2381

class MandosDBusServiceTransitional(MandosDBusService):

2382

__metaclass__ = AlternateDBusNamesMetaclass

2383

mandos_dbus_service = MandosDBusServiceTransitional()

2540

2384

2541

2385

def cleanup():

2542

2386

"Cleanup function; run on exit"

2549

2393

# Store client before exiting. Secrets are encrypted with key

2550

2394

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

2551

2395

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

2552

clients = {}

2553

with PGPEngine() as pgp:

2396

clients = []

2397

with Crypto() as crypt:

2554

2398

for client in tcp_server.clients.itervalues():

2555

2399

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

2556

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

2557

key)

2400

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

2401

key)

2558

2402

client_dict = {}

2559

2403

2560

# A list of attributes that can not be pickled

2561

# + secret.

2562

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

2563

"checker"))

2404

# A list of attributes that will not be stored when

2405

# shutting down.

2406

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

2564

2407

for name, typ in (inspect.getmembers

2565

2408

(dbus.service.Object)):

2566

2409

exclude.add(name)

2571

2414

if attr not in exclude:

2572

2415

client_dict[attr] = getattr(client, attr)

2573

2416

2574

clients[client.name] = client_dict

2417

clients.append(client_dict)

2575

2418

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

2576

2419

2577

2420

try:

2578

with (tempfile.NamedTemporaryFile

2579

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

2580

dir=os.path.dirname(stored_state_path),

2581

delete=False)) as stored_state:

2421

with os.fdopen(os.open(stored_state_path,

2422

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

2423

0600), "wb") as stored_state:

2582

2424

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

2583

tempname=stored_state.name

2584

os.rename(tempname, stored_state_path)

2585

2425

except (IOError, OSError) as e:

2586

if not debug:

2587

try:

2588

os.remove(tempname)

2589

except NameError:

2590

pass

2591

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

2592

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

2593

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

2594

else:

2595

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

2596

exc_info=e)

2597

raise e

2426

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

2427

.format(e))

2428

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

2429

raise

2598

2430

2599

2431

# Delete all clients, and settings from config

2600

2432

while tcp_server.clients:

2627

2459

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

2628

2460

if use_ipv6:

2629

2461

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

2630

" flowinfo %d, scope_id %d",

2631

*tcp_server.socket.getsockname())

2462

" flowinfo %d, scope_id %d"

2463

% tcp_server.socket.getsockname())

2632

2464

else: # IPv4

2633

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

2634

*tcp_server.socket.getsockname())

2465

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

2466

% tcp_server.socket.getsockname())

2635

2467

2636

2468

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

2637

2469

2640

2472

try:

2641

2473

service.activate()

2642

2474

except dbus.exceptions.DBusException as error:

2643

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

2475

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

2644

2476

cleanup()

2645

2477

sys.exit(1)

2646

2478

# End of Avahi example code

2653

2485

logger.debug("Starting main loop")

2654

2486

main_loop.run()

2655

2487

except AvahiError as error:

2656

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

2488

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

2657

2489

cleanup()

2658

2490

sys.exit(1)

2659

2491

except KeyboardInterrupt:

2664

2496

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

2665

2497

cleanup()

2666

2498

2499

2667

2500

if __name__ == '__main__':

2668

2501

main()