/mandos/release : revision 237.7.154

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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 = "1.4.1"

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version = "1.5.5"

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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(level=logging.WARNING):

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def initlogger(debug, 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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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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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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logger.setLevel(level)

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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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'--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 encrypt(self, data, password):

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

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with open(os.devnull) as devnull:

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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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def decrypt(self, data, password):

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

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with open(os.devnull) as devnull:

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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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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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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("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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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, or None.

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checker, -2 means no checker completed yet.

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

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

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D-Bus identifiers

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

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

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until this client is disabled

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extended_timeout: extra long timeout when password has been sent

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extended_timeout: extra long timeout when secret has been sent

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runtime_expansions: Allowed attributes for runtime expansion.

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

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disabled, or None

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"""

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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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def approval_delay_milliseconds(self):

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

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

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

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

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with exceptions for any special settings as defined above"""

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with exceptions for any special settings as defined above.

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

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value given the same arguments.

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"""

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settings = {}

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for client_name in config.sections():

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section = dict(config.items(client_name))

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client = settings[client_name] = {}

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# Default copying each value from config to new dict

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for setting, value in section.iteritems():

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client[setting] = value

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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, "enabled")

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

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"enabled")

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

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.replace(" ", ""))

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"rb") as secfile:

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

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else:

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

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% section)

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raise TypeError("No secret or secfile for section {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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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, config, 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):

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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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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"]

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

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self.secret = config["secret"]

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self.host = config["host"]

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self.created = datetime.datetime.utcnow()

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self.enabled = config["enabled"]

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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

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self.last_checked_ok = None

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self.last_checker_status = None

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self.timeout = config["timeout"]

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self.extended_timeout = config["extended_timeout"]

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self.interval = config["interval"]

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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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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_by_default = config["approved_by_default"]

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self.approvals_pending = 0

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self.approval_delay = config["approval_delay"]

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self.approval_duration = 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

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self.enabled = True

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self.last_enabled = datetime.datetime.utcnow()

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self.init_checker()

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self.send_changedstate()

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def disable(self, quiet=True):

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"""Disable this client."""

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

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return False

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if not quiet:

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self.send_changedstate()

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if not quiet:

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

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

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

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gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = None

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self.expires = None

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

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

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gobject.source_remove(self.checker_initiator_tag)

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self.checker_initiator_tag = None

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self.stop_checker()

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self.enabled = False

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if not quiet:

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self.send_changedstate()

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

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return False

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def init_checker(self):

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

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# and every interval from then on.

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if self.checker_initiator_tag is not None:

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gobject.source_remove(self.checker_initiator_tag)

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self.checker_initiator_tag = (gobject.timeout_add

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(self.interval_milliseconds(),

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self.start_checker))

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

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if self.disable_initiator_tag is not None:

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gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = (gobject.timeout_add

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(self.timeout_milliseconds(),

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self.disable))

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

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vars(self))

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def checked_ok(self, timeout=None):

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"""Bump up the timeout for this client.

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

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alive and well.

633

"""

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def checked_ok(self):

644

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

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self.last_checked_ok = datetime.datetime.utcnow()

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self.last_checker_status = 0

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self.bump_timeout()

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def bump_timeout(self, timeout=None):

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

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if timeout is None:

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timeout = self.timeout

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self.last_checked_ok = datetime.datetime.utcnow()

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if self.disable_initiator_tag is not None:

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gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = None

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

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self.disable_initiator_tag = (gobject.timeout_add

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(timedelta_to_milliseconds

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If a checker already exists, leave it running and do

652

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nothing."""

653

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

654

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

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

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# client would inevitably timeout, since no checker would get

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

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

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

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# would inevitably timeout, since no checker would get a

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

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

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

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# should be.

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self.current_checker_command)

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# Start a new checker if needed

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if self.checker is None:

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# Escape attributes for the shell

695

escaped_attrs = dict(

696

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

697

for attr in

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self.runtime_expansions)

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699

try:

678

# In case checker_command has exactly one % operator

679

command = self.checker_command % self.host

680

except TypeError:

681

# Escape attributes for the shell

682

escaped_attrs = dict(

683

(attr,

684

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

685

errors=

686

'replace')))

687

for attr in

688

self.runtime_expansions)

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690

try:

691

command = self.checker_command % escaped_attrs

692

except TypeError as error:

693

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

694

' %s', self.checker_command, error)

695

return True # Try again later

700

command = self.checker_command % escaped_attrs

701

except TypeError as error:

702

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

703

self.checker_command, exc_info=error)

704

return True # Try again later

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705

self.current_checker_command = command

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706

try:

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707

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

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713

self.checker = subprocess.Popen(command,

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714

close_fds=True,

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shell=True, cwd="/")

707

self.checker_callback_tag = (gobject.child_watch_add

708

(self.checker.pid,

709

self.checker_callback,

710

data=command))

711

# The checker may have completed before the gobject

712

# watch was added. Check for this.

713

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

714

if pid:

715

gobject.source_remove(self.checker_callback_tag)

716

self.checker_callback(pid, status, command)

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except OSError as error:

718

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

719

error)

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logger.error("Failed to start subprocess",

718

exc_info=error)

719

self.checker_callback_tag = (gobject.child_watch_add

720

(self.checker.pid,

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self.checker_callback,

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data=command))

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# The checker may have completed before the gobject

724

# watch was added. Check for this.

725

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

726

if pid:

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gobject.source_remove(self.checker_callback_tag)

728

self.checker_callback(pid, status, command)

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

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return True

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738

return

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

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try:

732

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

741

self.checker.terminate()

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#time.sleep(0.5)

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

735

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

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# self.checker.kill()

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745

except OSError as error:

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746

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

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raise

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764

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

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if byte_arrays and signature != "ay":

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766

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

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" signature %r" % signature)

767

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

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768

def decorator(func):

760

769

func._dbus_is_property = True

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770

func._dbus_interface = dbus_interface

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return decorator

770

779

771

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781

def dbus_interface_annotations(dbus_interface):

782

"""Decorator for marking functions returning interface annotations

783

784

Usage:

785

786

@dbus_interface_annotations("org.example.Interface")

787

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

788

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

789

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

790

"false"}

791

"""

792

def decorator(func):

793

func._dbus_is_interface = True

794

func._dbus_interface = dbus_interface

795

func._dbus_name = dbus_interface

796

return func

797

return decorator

798

799

800

def dbus_annotations(annotations):

801

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

802

Usage:

803

804

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

805

access="r")

806

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

807

"org.freedesktop.DBus.Property."

808

"EmitsChangedSignal": "false"})

809

def Property_dbus_property(self):

810

return dbus.Boolean(False)

811

"""

812

def decorator(func):

813

func._dbus_annotations = annotations

814

return func

815

return decorator

816

817

772

818

class DBusPropertyException(dbus.exceptions.DBusException):

773

819

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

774

820

"""

797

843

"""

798

844

799

845

@staticmethod

800

def _is_dbus_property(obj):

801

return getattr(obj, "_dbus_is_property", False)

846

def _is_dbus_thing(thing):

847

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

848

849

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

850

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

851

"""

852

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

853

False)

802

854

803

def _get_all_dbus_properties(self):

855

def _get_all_dbus_things(self, thing):

804

856

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

805

857

"""

806

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

858

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

859

name),

860

athing.__get__(self))

807

861

for cls in self.__class__.__mro__

808

for name, prop in

809

inspect.getmembers(cls, self._is_dbus_property))

862

for name, athing in

863

inspect.getmembers(cls,

864

self._is_dbus_thing(thing)))

810

865

811

866

def _get_dbus_property(self, interface_name, property_name):

812

867

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

814

869

"""

815

870

for cls in self.__class__.__mro__:

816

871

for name, value in (inspect.getmembers

817

(cls, self._is_dbus_property)):

872

(cls,

873

self._is_dbus_thing("property"))):

818

874

if (value._dbus_name == property_name

819

875

and value._dbus_interface == interface_name):

820

876

return value.__get__(self)

849

905

# signatures other than "ay".

850

906

if prop._dbus_signature != "ay":

851

907

raise ValueError

852

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

853

for byte in value))

908

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

909

for byte in value))

854

910

prop(value)

855

911

856

912

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

862

918

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

863

919

"""

864

920

properties = {}

865

for name, prop in self._get_all_dbus_properties():

921

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

866

922

if (interface_name

867

923

and interface_name != prop._dbus_interface):

868

924

# Interface non-empty but did not match

883

939

path_keyword='object_path',

884

940

connection_keyword='connection')

885

941

def Introspect(self, object_path, connection):

886

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

942

"""Overloading of standard D-Bus method.

943

944

Inserts property tags and interface annotation tags.

887

945

"""

888

946

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

889

947

connection)

896

954

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

897

955

return e

898

956

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

957

# Add property tags

899

958

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

900

959

for name, prop

901

in self._get_all_dbus_properties()

960

in self._get_all_dbus_things("property")

902

961

if prop._dbus_interface

903

962

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

904

963

if_tag.appendChild(tag)

964

# Add annotation tags

965

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

966

for tag in if_tag.getElementsByTagName(typ):

967

annots = dict()

968

for name, prop in (self.

969

_get_all_dbus_things(typ)):

970

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

971

and prop._dbus_interface

972

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

973

annots.update(getattr

974

(prop,

975

"_dbus_annotations",

976

{}))

977

for name, value in annots.iteritems():

978

ann_tag = document.createElement(

979

"annotation")

980

ann_tag.setAttribute("name", name)

981

ann_tag.setAttribute("value", value)

982

tag.appendChild(ann_tag)

983

# Add interface annotation tags

984

for annotation, value in dict(

985

itertools.chain.from_iterable(

986

annotations().iteritems()

987

for name, annotations in

988

self._get_all_dbus_things("interface")

989

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

990

)).iteritems():

991

ann_tag = document.createElement("annotation")

992

ann_tag.setAttribute("name", annotation)

993

ann_tag.setAttribute("value", value)

994

if_tag.appendChild(ann_tag)

905

995

# Add the names to the return values for the

906

996

# "org.freedesktop.DBus.Properties" methods

907

997

if (if_tag.getAttribute("name")

922

1012

except (AttributeError, xml.dom.DOMException,

923

1013

xml.parsers.expat.ExpatError) as error:

924

1014

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

925

error)

1015

exc_info=error)

926

1016

return xmlstring

927

1017

928

1018

929

def datetime_to_dbus (dt, variant_level=0):

1019

def datetime_to_dbus(dt, variant_level=0):

930

1020

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

931

1021

if dt is None:

932

1022

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

934

1024

variant_level=variant_level)

935

1025

936

1026

937

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

938

.__metaclass__):

939

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

940

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

1027

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1028

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

1029

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

1030

interface names according to the "alt_interface_names" mapping.

1031

Usage:

1032

1033

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

1034

"net.example.AlternateInterface"})

1035

class SampleDBusObject(dbus.service.Object):

1036

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

1037

def SampleDBusMethod():

1038

pass

1039

1040

The above "SampleDBusMethod" on "SampleDBusObject" will be

1041

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

1042

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

1043

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

1044

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

1045

1046

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

1047

(from DBusObjectWithProperties) and interfaces (from the

1048

dbus_interface_annotations decorator).

941

1049

"""

942

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

943

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

944

# methods, signals, or properties in them

945

for base in (b for b in bases

946

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

947

# Go though all attributes of the base class

948

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

1050

def wrapper(cls):

1051

for orig_interface_name, alt_interface_name in (

1052

alt_interface_names.iteritems()):

1053

attr = {}

1054

interface_names = set()

1055

# Go though all attributes of the class

1056

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

949

1057

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

950

1058

# with the wrong interface name

951

1059

if (not hasattr(attribute, "_dbus_interface")

952

1060

or not attribute._dbus_interface

953

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

1061

.startswith(orig_interface_name)):

954

1062

continue

955

1063

# Create an alternate D-Bus interface name based on

956

1064

# the current name

957

1065

alt_interface = (attribute._dbus_interface

958

.replace("se.recompile.Mandos",

959

"se.bsnet.fukt.Mandos"))

1066

.replace(orig_interface_name,

1067

alt_interface_name))

1068

interface_names.add(alt_interface)

960

1069

# Is this a D-Bus signal?

961

1070

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

962

1071

# Extract the original non-method function by

977

1086

nonmethod_func.func_name,

978

1087

nonmethod_func.func_defaults,

979

1088

nonmethod_func.func_closure)))

1089

# Copy annotations, if any

1090

try:

1091

new_function._dbus_annotations = (

1092

dict(attribute._dbus_annotations))

1093

except AttributeError:

1094

pass

980

1095

# Define a creator of a function to call both the

981

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

982

# signals gets sent when the function is called

1096

# original and alternate functions, so both the

1097

# original and alternate signals gets sent when

1098

# the function is called

983

1099

def fixscope(func1, func2):

984

1100

"""This function is a scope container to pass

985

1101

func1 and func2 to the "call_both" function

992

1108

return call_both

993

1109

# Create the "call_both" function and add it to

994

1110

# the class

995

attr[attrname] = fixscope(attribute,

996

new_function)

1111

attr[attrname] = fixscope(attribute, new_function)

997

1112

# Is this a D-Bus method?

998

1113

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

999

1114

# Create a new, but exactly alike, function

1010

1125

attribute.func_name,

1011

1126

attribute.func_defaults,

1012

1127

attribute.func_closure)))

1128

# Copy annotations, if any

1129

try:

1130

attr[attrname]._dbus_annotations = (

1131

dict(attribute._dbus_annotations))

1132

except AttributeError:

1133

pass

1013

1134

# Is this a D-Bus property?

1014

1135

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

1015

1136

# Create a new, but exactly alike, function

1029

1150

attribute.func_name,

1030

1151

attribute.func_defaults,

1031

1152

attribute.func_closure)))

1032

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

1033

1034

1153

# Copy annotations, if any

1154

try:

1155

attr[attrname]._dbus_annotations = (

1156

dict(attribute._dbus_annotations))

1157

except AttributeError:

1158

pass

1159

# Is this a D-Bus interface?

1160

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

1161

# Create a new, but exactly alike, function

1162

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

1163

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

1164

# to the class.

1165

attr[attrname] = (dbus_interface_annotations

1166

(alt_interface)

1167

(types.FunctionType

1168

(attribute.func_code,

1169

attribute.func_globals,

1170

attribute.func_name,

1171

attribute.func_defaults,

1172

attribute.func_closure)))

1173

if deprecate:

1174

# Deprecate all alternate interfaces

1175

iname="_AlternateDBusNames_interface_annotation{0}"

1176

for interface_name in interface_names:

1177

@dbus_interface_annotations(interface_name)

1178

def func(self):

1179

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

1180

"true" }

1181

# Find an unused name

1182

for aname in (iname.format(i)

1183

for i in itertools.count()):

1184

if aname not in attr:

1185

attr[aname] = func

1186

break

1187

if interface_names:

1188

# Replace the class with a new subclass of it with

1189

# methods, signals, etc. as created above.

1190

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

1191

(cls,), attr)

1192

return cls

1193

return wrapper

1194

1195

1196

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

1197

"se.bsnet.fukt.Mandos"})

1035

1198

class ClientDBus(Client, DBusObjectWithProperties):

1036

1199

"""A Client class using D-Bus

1037

1200

1048

1211

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

1049

1212

self.bus = bus

1050

1213

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

1051

1052

self._approvals_pending = 0

1053

1214

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

1054

1215

# the D-Bus

1055

1216

client_object_name = unicode(self.name).translate(

1059

1220

("/clients/" + client_object_name))

1060

1221

DBusObjectWithProperties.__init__(self, self.bus,

1061

1222

self.dbus_object_path)

1062

1223

1063

1224

def notifychangeproperty(transform_func,

1064

1225

dbus_name, type_func=lambda x: x,

1065

1226

variant_level=1):

1088

1249

1089

1250

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

1090

1251

1091

1092

1252

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1093

1253

approvals_pending = notifychangeproperty(dbus.Boolean,

1094

1254

"ApprovalPending",

1101

1261

checker is not None)

1102

1262

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1103

1263

"LastCheckedOK")

1264

last_checker_status = notifychangeproperty(dbus.Int16,

1265

"LastCheckerStatus")

1104

1266

last_approval_request = notifychangeproperty(

1105

1267

datetime_to_dbus, "LastApprovalRequest")

1106

1268

approved_by_default = notifychangeproperty(dbus.Boolean,

1174

1336

return False

1175

1337

1176

1338

def approve(self, value=True):

1177

self.send_changedstate()

1178

1339

self.approved = value

1179

1340

gobject.timeout_add(timedelta_to_milliseconds

1180

1341

(self.approval_duration),

1181

1342

self._reset_approved)

1182

1343

self.send_changedstate()

1183

1344

1184

1345

## D-Bus methods, signals & properties

1185

1346

_interface = "se.recompile.Mandos.Client"

1186

1347

1348

## Interfaces

1349

1350

@dbus_interface_annotations(_interface)

1351

def _foo(self):

1352

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

1353

"false"}

1354

1187

1355

## Signals

1188

1356

1189

1357

# CheckerCompleted - signal

1225

1393

"D-Bus signal"

1226

1394

return self.need_approval()

1227

1395

1228

# NeRwequest - signal

1229

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

1230

def NewRequest(self, ip):

1231

"""D-Bus signal

1232

Is sent after a client request a password.

1233

"""

1234

pass

1235

1236

1396

## Methods

1237

1397

1238

1398

# Approve - method

1348

1508

return

1349

1509

return datetime_to_dbus(self.last_checked_ok)

1350

1510

1511

# LastCheckerStatus - property

1512

@dbus_service_property(_interface, signature="n",

1513

access="read")

1514

def LastCheckerStatus_dbus_property(self):

1515

return dbus.Int16(self.last_checker_status)

1516

1351

1517

# Expires - property

1352

1518

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

1353

1519

def Expires_dbus_property(self):

1364

1530

def Timeout_dbus_property(self, value=None):

1365

1531

if value is None: # get

1366

1532

return dbus.UInt64(self.timeout_milliseconds())

1533

old_timeout = self.timeout

1367

1534

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

1368

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

1369

return

1370

# Reschedule timeout

1371

gobject.source_remove(self.disable_initiator_tag)

1372

self.disable_initiator_tag = None

1373

self.expires = None

1374

time_to_die = timedelta_to_milliseconds((self

1375

.last_checked_ok

1376

+ self.timeout)

1377

- datetime.datetime

1378

.utcnow())

1379

if time_to_die <= 0:

1380

# The timeout has passed

1381

self.disable()

1382

else:

1383

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

1384

+ datetime.timedelta(milliseconds =

1385

time_to_die))

1386

self.disable_initiator_tag = (gobject.timeout_add

1387

(time_to_die, self.disable))

1535

# Reschedule disabling

1536

if self.enabled:

1537

now = datetime.datetime.utcnow()

1538

self.expires += self.timeout - old_timeout

1539

if self.expires <= now:

1540

# The timeout has passed

1541

self.disable()

1542

else:

1543

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

1544

is None):

1545

return

1546

gobject.source_remove(self.disable_initiator_tag)

1547

self.disable_initiator_tag = (

1548

gobject.timeout_add(

1549

timedelta_to_milliseconds(self.expires - now),

1550

self.disable))

1388

1551

1389

1552

# ExtendedTimeout - property

1390

1553

@dbus_service_property(_interface, signature="t",

1469

1632

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

1470

1633

1471

1634

1472

class ClientDBusTransitional(ClientDBus):

1473

__metaclass__ = AlternateDBusNamesMetaclass

1474

1475

1476

1635

class ClientHandler(socketserver.BaseRequestHandler, object):

1477

1636

"""A class to handle client connections.

1478

1637

1546

1705

except KeyError:

1547

1706

return

1548

1707

1549

if self.server.use_dbus:

1550

# Emit D-Bus signal

1551

client.NewRequest(str(self.client_address))

1552

1553

1708

if client.approval_delay:

1554

1709

delay = client.approval_delay

1555

1710

client.approvals_pending += 1

1586

1741

#wait until timeout or approved

1587

1742

time = datetime.datetime.now()

1588

1743

client.changedstate.acquire()

1589

(client.changedstate.wait

1590

(float(client.timedelta_to_milliseconds(delay)

1591

/ 1000)))

1744

client.changedstate.wait(

1745

float(timedelta_to_milliseconds(delay)

1746

/ 1000))

1592

1747

client.changedstate.release()

1593

1748

time2 = datetime.datetime.now()

1594

1749

if (time2 - time) >= delay:

1610

1765

try:

1611

1766

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

1612

1767

except gnutls.errors.GNUTLSError as error:

1613

logger.warning("gnutls send failed")

1768

logger.warning("gnutls send failed",

1769

exc_info=error)

1614

1770

return

1615

1771

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

1616

1772

sent, len(client.secret)

1619

1775

1620

1776

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

1621

1777

# bump the timeout using extended_timeout

1622

client.checked_ok(client.extended_timeout)

1778

client.bump_timeout(client.extended_timeout)

1623

1779

if self.server.use_dbus:

1624

1780

# Emit D-Bus signal

1625

1781

client.GotSecret()

1630

1786

try:

1631

1787

session.bye()

1632

1788

except gnutls.errors.GNUTLSError as error:

1633

logger.warning("GnuTLS bye failed")

1789

logger.warning("GnuTLS bye failed",

1790

exc_info=error)

1634

1791

1635

1792

@staticmethod

1636

1793

def peer_certificate(session):

1708

1865

def process_request(self, request, address):

1709

1866

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

1710

1867

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

1711

args = (request,

1712

address))

1868

args = (request, address))

1713

1869

proc.start()

1714

1870

return proc

1715

1871

1743

1899

use_ipv6: Boolean; to use IPv6 or not

1744

1900

"""

1745

1901

def __init__(self, server_address, RequestHandlerClass,

1746

interface=None, use_ipv6=True):

1902

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

1903

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

1904

creating a new one with socket.socket().

1905

"""

1747

1906

self.interface = interface

1748

1907

if use_ipv6:

1749

1908

self.address_family = socket.AF_INET6

1909

if socketfd is not None:

1910

# Save the file descriptor

1911

self.socketfd = socketfd

1912

# Save the original socket.socket() function

1913

self.socket_socket = socket.socket

1914

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

1915

#

1916

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

1917

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

1918

# patching socket.socket.)

1919

#

1920

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

1921

@functools.wraps(socket.socket)

1922

def socket_wrapper(*args, **kwargs):

1923

# Restore original function so subsequent calls are

1924

# not affected.

1925

socket.socket = self.socket_socket

1926

del self.socket_socket

1927

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

1928

# saved file descriptor.

1929

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

1930

# Replace socket.socket() function with wrapper

1931

socket.socket = socket_wrapper

1932

# The socketserver.TCPServer.__init__ will call

1933

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

1934

# socket_wrapper(), if socketfd was set.

1750

1935

socketserver.TCPServer.__init__(self, server_address,

1751

1936

RequestHandlerClass)

1937

1752

1938

def server_bind(self):

1753

1939

"""This overrides the normal server_bind() function

1754

1940

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

1762

1948

try:

1763

1949

self.socket.setsockopt(socket.SOL_SOCKET,

1764

1950

SO_BINDTODEVICE,

1765

str(self.interface

1766

+ '\0'))

1951

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

1767

1952

except socket.error as error:

1768

if error[0] == errno.EPERM:

1769

logger.error("No permission to"

1770

" bind to interface %s",

1771

self.interface)

1772

elif error[0] == errno.ENOPROTOOPT:

1953

if error.errno == errno.EPERM:

1954

logger.error("No permission to bind to"

1955

" interface %s", self.interface)

1956

elif error.errno == errno.ENOPROTOOPT:

1773

1957

logger.error("SO_BINDTODEVICE not available;"

1774

1958

" cannot bind to interface %s",

1775

1959

self.interface)

1960

elif error.errno == errno.ENODEV:

1961

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

1962

" cannot bind", self.interface)

1776

1963

else:

1777

1964

raise

1778

1965

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

1808

1995

"""

1809

1996

def __init__(self, server_address, RequestHandlerClass,

1810

1997

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

1811

gnutls_priority=None, use_dbus=True):

1998

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

1812

1999

self.enabled = False

1813

2000

self.clients = clients

1814

2001

if self.clients is None:

1818

2005

IPv6_TCPServer.__init__(self, server_address,

1819

2006

RequestHandlerClass,

1820

2007

interface = interface,

1821

use_ipv6 = use_ipv6)

2008

use_ipv6 = use_ipv6,

2009

socketfd = socketfd)

1822

2010

def server_activate(self):

1823

2011

if self.enabled:

1824

2012

return socketserver.TCPServer.server_activate(self)

1837

2025

1838

2026

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

1839

2027

proc = None, client_object=None):

1840

condition_names = {

1841

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

1842

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

1843

# blocking).

1844

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

1845

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

1846

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

1847

# broken, usually for pipes and

1848

# sockets).

1849

}

1850

conditions_string = ' | '.join(name

1851

for cond, name in

1852

condition_names.iteritems()

1853

if cond & condition)

1854

2028

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

1855

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

2029

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

1856

2030

# Wait for other process to exit

1857

2031

proc.join()

1858

2032

return False

1948

2122

elif suffix == "w":

1949

2123

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

1950

2124

else:

1951

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

2125

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

2126

.format(suffix))

1952

2127

except (ValueError, IndexError) as e:

1953

2128

raise ValueError(*(e.args))

1954

2129

timevalue += delta

1968

2143

sys.exit()

1969

2144

if not noclose:

1970

2145

# Close all standard open file descriptors

1971

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

2146

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

1972

2147

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

1973

2148

raise OSError(errno.ENODEV,

1974

"%s not a character device"

1975

% os.path.devnull)

2149

"{0} not a character device"

2150

.format(os.devnull))

1976

2151

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

1977

2152

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

1978

2153

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

1987

2162

1988

2163

parser = argparse.ArgumentParser()

1989

2164

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

1990

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

2165

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

1991

2166

help="show version number and exit")

1992

2167

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

1993

2168

help="Bind to interface IF")

2018

2193

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

2019

2194

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

2020

2195

" state")

2196

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

2197

help="Specify a file descriptor to a network"

2198

" socket to use instead of creating one")

2021

2199

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

2022

2200

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

2201

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

2202

help="Run in foreground")

2023

2203

2024

2204

options = parser.parse_args()

2025

2205

2040

2220

"use_ipv6": "True",

2041

2221

"debuglevel": "",

2042

2222

"restore": "True",

2043

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

2223

"socket": "",

2224

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

2225

"foreground": "False",

2044

2226

}

2045

2227

2046

2228

# Parse config file for server-global settings

2051

2233

# Convert the SafeConfigParser object to a dict

2052

2234

server_settings = server_config.defaults()

2053

2235

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

2054

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

2236

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

2055

2237

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

2056

2238

option)

2057

2239

if server_settings["port"]:

2058

2240

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

2059

2241

"port")

2242

if server_settings["socket"]:

2243

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

2244

"socket")

2245

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

2246

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

2247

# happen with a supplied network socket.

2248

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

2249

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

2250

["socket"])

2060

2251

del server_config

2061

2252

2062

2253

# Override the settings from the config file with command line

2064

2255

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

2065

2256

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

2066

2257

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

2067

"statedir"):

2258

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

2068

2259

value = getattr(options, option)

2069

2260

if value is not None:

2070

2261

server_settings[option] = value

2073

2264

for option in server_settings.keys():

2074

2265

if type(server_settings[option]) is str:

2075

2266

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

2267

# Debug implies foreground

2268

if server_settings["debug"]:

2269

server_settings["foreground"] = True

2076

2270

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

2077

2271

2078

2272

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

2084

2278

use_ipv6 = server_settings["use_ipv6"]

2085

2279

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

2086

2280

stored_state_file)

2281

foreground = server_settings["foreground"]

2087

2282

2088

2283

if debug:

2089

initlogger(logging.DEBUG)

2284

initlogger(debug, logging.DEBUG)

2090

2285

else:

2091

2286

if not debuglevel:

2092

initlogger()

2287

initlogger(debug)

2093

2288

else:

2094

2289

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

2095

initlogger(level)

2290

initlogger(debug, level)

2096

2291

2097

2292

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

2098

2293

syslogger.setFormatter(logging.Formatter

2099

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

2100

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

2101

% server_settings["servicename"]))

2294

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

2295

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

2296

.format(server_settings

2297

["servicename"])))

2102

2298

2103

2299

# Parse config file with clients

2104

client_config = configparser.SafeConfigParser(Client.client_defaults)

2300

client_config = configparser.SafeConfigParser(Client

2301

.client_defaults)

2105

2302

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

2106

2303

"clients.conf"))

2107

2304

2116

2313

use_ipv6=use_ipv6,

2117

2314

gnutls_priority=

2118

2315

server_settings["priority"],

2119

use_dbus=use_dbus)

2120

if not debug:

2316

use_dbus=use_dbus,

2317

socketfd=(server_settings["socket"]

2318

or None))

2319

if not foreground:

2121

2320

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

2321

pidfile = None

2122

2322

try:

2123

2323

pidfile = open(pidfilename, "w")

2124

except IOError:

2125

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

2324

except IOError as e:

2325

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

2326

exc_info=e)

2126

2327

2127

try:

2128

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

2129

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

2130

except KeyError:

2328

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

2131

2329

try:

2132

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

2133

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

2330

uid = pwd.getpwnam(name).pw_uid

2331

gid = pwd.getpwnam(name).pw_gid

2332

break

2134

2333

except KeyError:

2135

try:

2136

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

2137

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

2138

except KeyError:

2139

uid = 65534

2140

gid = 65534

2334

continue

2335

else:

2336

uid = 65534

2337

gid = 65534

2141

2338

try:

2142

2339

os.setgid(gid)

2143

2340

os.setuid(uid)

2144

2341

except OSError as error:

2145

if error[0] != errno.EPERM:

2342

if error.errno != errno.EPERM:

2146

2343

raise error

2147

2344

2148

2345

if debug:

2160

2357

.gnutls_global_set_log_function(debug_gnutls))

2161

2358

2162

2359

# Redirect stdin so all checkers get /dev/null

2163

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

2360

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

2164

2361

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

2165

2362

if null > 2:

2166

2363

os.close(null)

2167

else:

2168

# No console logging

2169

logger.removeHandler(console)

2170

2364

2171

2365

# Need to fork before connecting to D-Bus

2172

if not debug:

2366

if not foreground:

2173

2367

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

2174

2368

daemon()

2175

2369

2370

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

2371

# need to inform gobject that threads will be used.

2372

gobject.threads_init()

2373

2176

2374

global main_loop

2177

2375

# From the Avahi example code

2178

DBusGMainLoop(set_as_default=True )

2376

DBusGMainLoop(set_as_default=True)

2179

2377

main_loop = gobject.MainLoop()

2180

2378

bus = dbus.SystemBus()

2181

2379

# End of Avahi example code

2187

2385

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

2188

2386

do_not_queue=True))

2189

2387

except dbus.exceptions.NameExistsException as e:

2190

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

2388

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

2191

2389

use_dbus = False

2192

2390

server_settings["use_dbus"] = False

2193

2391

tcp_server.use_dbus = False

2205

2403

2206

2404

client_class = Client

2207

2405

if use_dbus:

2208

client_class = functools.partial(ClientDBusTransitional,

2209

bus = bus)

2406

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

2210

2407

2211

2408

client_settings = Client.config_parser(client_config)

2212

2409

old_client_settings = {}

2213

clients_data = []

2410

clients_data = {}

2214

2411

2215

2412

# Get client data and settings from last running state.

2216

2413

if server_settings["restore"]:

2220

2417

(stored_state))

2221

2418

os.remove(stored_state_path)

2222

2419

except IOError as e:

2223

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

2224

.format(e))

2225

if e.errno != errno.ENOENT:

2420

if e.errno == errno.ENOENT:

2421

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

2422

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

2423

else:

2424

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

2425

exc_info=e)

2226

2426

raise

2427

except EOFError as e:

2428

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

2429

"EOFError:", exc_info=e)

2227

2430

2228

2431

with PGPEngine() as pgp:

2229

for client in clients_data:

2230

client_name = client["name"]

2231

2432

for client_name, client in clients_data.iteritems():

2232

2433

# Decide which value to use after restoring saved state.

2233

2434

# We have three different values: Old config file,

2234

2435

# new config file, and saved state.

2248

2449

2249

2450

# Clients who has passed its expire date can still be

2250

2451

# enabled if its last checker was successful. Clients

2251

# whose checker failed before we stored its state is

2252

# assumed to have failed all checkers during downtime.

2452

# whose checker succeeded before we stored its state is

2453

# assumed to have successfully run all checkers during

2454

# downtime.

2253

2455

if client["enabled"]:

2254

2456

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

2255

2457

if not client["last_checked_ok"]:

2256

2458

logger.warning(

2257

2459

"disabling client {0} - Client never "

2258

"performed a successfull checker"

2259

.format(client["name"]))

2460

"performed a successful checker"

2461

.format(client_name))

2260

2462

client["enabled"] = False

2261

2463

elif client["last_checker_status"] != 0:

2262

2464

logger.warning(

2263

2465

"disabling client {0} - Client "

2264

2466

"last checker failed with error code {1}"

2265

.format(client["name"],

2467

.format(client_name,

2266

2468

client["last_checker_status"]))

2267

2469

client["enabled"] = False

2268

2470

else:

2269

2471

client["expires"] = (datetime.datetime

2270

2472

.utcnow()

2271

2473

+ client["timeout"])

2272

2273

client["changedstate"] = (multiprocessing_manager

2274

.Condition

2275

(multiprocessing_manager

2276

.Lock()))

2277

client["checker"] = None

2278

if use_dbus:

2279

new_client = (ClientDBusTransitional.__new__

2280

(ClientDBusTransitional))

2281

tcp_server.clients[client_name] = new_client

2282

new_client.bus = bus

2283

for name, value in client.iteritems():

2284

setattr(new_client, name, value)

2285

client_object_name = unicode(client_name).translate(

2286

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

2287

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

2288

new_client.dbus_object_path = (dbus.ObjectPath

2289

("/clients/"

2290

+ client_object_name))

2291

DBusObjectWithProperties.__init__(new_client,

2292

new_client.bus,

2293

new_client

2294

.dbus_object_path)

2295

else:

2296

tcp_server.clients[client_name] = (Client.__new__

2297

(Client))

2298

for name, value in client.iteritems():

2299

setattr(tcp_server.clients[client_name],

2300

name, value)

2301

2474

logger.debug("Last checker succeeded,"

2475

" keeping {0} enabled"

2476

.format(client_name))

2302

2477

try:

2303

tcp_server.clients[client_name].secret = (

2304

pgp.decrypt(tcp_server.clients[client_name]

2305

.encrypted_secret,

2478

client["secret"] = (

2479

pgp.decrypt(client["encrypted_secret"],

2306

2480

client_settings[client_name]

2307

2481

["secret"]))

2308

2482

except PGPError:

2309

2483

# If decryption fails, we use secret from new settings

2310

2484

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

2311

2485

.format(client_name))

2312

tcp_server.clients[client_name].secret = (

2486

client["secret"] = (

2313

2487

client_settings[client_name]["secret"])

2314

2488

2315

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

2316

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

2317

del tcp_server.clients[clientname]

2318

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

2319

tcp_server.clients[clientname] = (client_class(name = clientname,

2320

config =

2321

client_settings

2322

[clientname]))

2489

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

2490

for client_name in (set(old_client_settings)

2491

- set(client_settings)):

2492

del clients_data[client_name]

2493

for client_name in (set(client_settings)

2494

- set(old_client_settings)):

2495

clients_data[client_name] = client_settings[client_name]

2496

2497

# Create all client objects

2498

for client_name, client in clients_data.iteritems():

2499

tcp_server.clients[client_name] = client_class(

2500

name = client_name, settings = client)

2323

2501

2324

2502

if not tcp_server.clients:

2325

2503

logger.warning("No clients defined")

2326

2327

if not debug:

2328

try:

2329

with pidfile:

2330

pid = os.getpid()

2331

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

2332

del pidfile

2333

except IOError:

2334

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

2335

pidfilename, pid)

2336

except NameError:

2337

# "pidfile" was never created

2338

pass

2504

2505

if not foreground:

2506

if pidfile is not None:

2507

try:

2508

with pidfile:

2509

pid = os.getpid()

2510

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

2511

except IOError:

2512

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

2513

pidfilename, pid)

2514

del pidfile

2339

2515

del pidfilename

2340

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

2341

2516

2342

2517

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

2343

2518

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

2344

2519

2345

2520

if use_dbus:

2346

class MandosDBusService(dbus.service.Object):

2521

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

2522

"se.bsnet.fukt.Mandos"})

2523

class MandosDBusService(DBusObjectWithProperties):

2347

2524

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

2348

2525

def __init__(self):

2349

2526

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

2350

2527

_interface = "se.recompile.Mandos"

2351

2528

2529

@dbus_interface_annotations(_interface)

2530

def _foo(self):

2531

return { "org.freedesktop.DBus.Property"

2532

".EmitsChangedSignal":

2533

"false"}

2534

2352

2535

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

2353

2536

def ClientAdded(self, objpath):

2354

2537

"D-Bus signal"

2396

2579

2397

2580

del _interface

2398

2581

2399

class MandosDBusServiceTransitional(MandosDBusService):

2400

__metaclass__ = AlternateDBusNamesMetaclass

2401

mandos_dbus_service = MandosDBusServiceTransitional()

2582

mandos_dbus_service = MandosDBusService()

2402

2583

2403

2584

def cleanup():

2404

2585

"Cleanup function; run on exit"

2411

2592

# Store client before exiting. Secrets are encrypted with key

2412

2593

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

2413

2594

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

2414

clients = []

2595

clients = {}

2415

2596

with PGPEngine() as pgp:

2416

2597

for client in tcp_server.clients.itervalues():

2417

2598

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

2419

2600

key)

2420

2601

client_dict = {}

2421

2602

2422

# A list of attributes that will not be stored when

2423

# shutting down.

2603

# A list of attributes that can not be pickled

2604

# + secret.

2424

2605

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

2425

2606

"checker"))

2426

2607

for name, typ in (inspect.getmembers

2433

2614

if attr not in exclude:

2434

2615

client_dict[attr] = getattr(client, attr)

2435

2616

2436

clients.append(client_dict)

2617

clients[client.name] = client_dict

2437

2618

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

2438

2619

2439

2620

try:

2440

with os.fdopen(os.open(stored_state_path,

2441

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

2442

0600), "wb") as stored_state:

2621

with (tempfile.NamedTemporaryFile

2622

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

2623

dir=os.path.dirname(stored_state_path),

2624

delete=False)) as stored_state:

2443

2625

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

2626

tempname=stored_state.name

2627

os.rename(tempname, stored_state_path)

2444

2628

except (IOError, OSError) as e:

2445

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

2446

.format(e))

2447

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

2448

raise

2629

if not debug:

2630

try:

2631

os.remove(tempname)

2632

except NameError:

2633

pass

2634

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

2635

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

2636

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

2637

else:

2638

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

2639

exc_info=e)

2640

raise e

2449

2641

2450

2642

# Delete all clients, and settings from config

2451

2643

while tcp_server.clients:

2478

2670

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

2479

2671

if use_ipv6:

2480

2672

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

2481

" flowinfo %d, scope_id %d"

2482

% tcp_server.socket.getsockname())

2673

" flowinfo %d, scope_id %d",

2674

*tcp_server.socket.getsockname())

2483

2675

else: # IPv4

2484

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

2485

% tcp_server.socket.getsockname())

2676

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

2677

*tcp_server.socket.getsockname())

2486

2678

2487

2679

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

2488

2680

2491

2683

try:

2492

2684

service.activate()

2493

2685

except dbus.exceptions.DBusException as error:

2494

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

2686

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

2495

2687

cleanup()

2496

2688

sys.exit(1)

2497

2689

# End of Avahi example code

2504

2696

logger.debug("Starting main loop")

2505

2697

main_loop.run()

2506

2698

except AvahiError as error:

2507

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

2699

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

2508

2700

cleanup()

2509

2701

sys.exit(1)

2510

2702

except KeyboardInterrupt: