/mandos/trunk : revision 518.1.9

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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 = "1.5.5"

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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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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 __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, "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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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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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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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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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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"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"])),

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"rb") as secfile:

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self.secret = secfile.read()

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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

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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

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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", None) is not None:

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

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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", None) is not None:

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

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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()

602

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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,

610

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# and every interval from then on.

611

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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self.checker_callback_tag = None

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self.checker = None

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if os.WIFEXITED(condition):

630

self.last_checker_status = os.WEXITSTATUS(condition)

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self.last_checker_status = os.WEXITSTATUS(condition)

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if self.last_checker_status == 0:

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581

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

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vars(self))

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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):

644

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

645

self.last_checked_ok = datetime.datetime.utcnow()

646

self.last_checker_status = 0

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self.bump_timeout()

648

649

def bump_timeout(self, timeout=None):

650

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

592

def checked_ok(self, timeout=None):

593

"""Bump up the timeout for this client.

594

595

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

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alive and well.

597

"""

651

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if timeout is None:

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timeout = self.timeout

600

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)

655

self.disable_initiator_tag = None

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603

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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(_timedelta_to_milliseconds

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(timeout), self.disable))

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

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608

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615

If a checker already exists, leave it running and do

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616

nothing."""

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

671

# 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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# 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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# 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

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escaped_attrs = dict(

696

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

697

for attr in

698

self.runtime_expansions)

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641

try:

700

command = self.checker_command % escaped_attrs

701

except TypeError as error:

702

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

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self.checker_command, exc_info=error)

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return True # Try again later

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# In case checker_command has exactly one % operator

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command = self.checker_command % self.host

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except TypeError:

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# Escape attributes for the shell

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escaped_attrs = dict(

647

(attr,

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

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errors=

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'replace')))

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for attr in

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self.runtime_expansions)

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try:

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command = self.checker_command % escaped_attrs

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except TypeError as error:

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

658

' %s', self.checker_command, error)

659

return True # Try again later

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self.current_checker_command = command

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661

try:

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662

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

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self.checker = subprocess.Popen(command,

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669

close_fds=True,

715

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shell=True, cwd="/")

671

self.checker_callback_tag = (gobject.child_watch_add

672

(self.checker.pid,

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self.checker_callback,

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data=command))

675

# The checker may have completed before the gobject

676

# watch was added. Check for this.

677

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

678

if pid:

679

gobject.source_remove(self.checker_callback_tag)

680

self.checker_callback(pid, status, command)

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681

except OSError as error:

717

logger.error("Failed to start subprocess",

718

exc_info=error)

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self.checker_callback_tag = (gobject.child_watch_add

720

(self.checker.pid,

721

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:

727

gobject.source_remove(self.checker_callback_tag)

728

self.checker_callback(pid, status, command)

682

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

683

error)

729

684

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

730

685

return True

731

686

738

693

return

739

694

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

740

695

try:

741

self.checker.terminate()

696

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

742

697

#time.sleep(0.5)

743

698

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

744

# self.checker.kill()

699

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

745

700

except OSError as error:

746

701

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

747

702

raise

764

719

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

765

720

if byte_arrays and signature != "ay":

766

721

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

767

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

722

" signature %r" % signature)

768

723

def decorator(func):

769

724

func._dbus_is_property = True

770

725

func._dbus_interface = dbus_interface

778

733

return decorator

779

734

780

735

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

818

736

class DBusPropertyException(dbus.exceptions.DBusException):

819

737

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

820

738

"""

843

761

"""

844

762

845

763

@staticmethod

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)

764

def _is_dbus_property(obj):

765

return getattr(obj, "_dbus_is_property", False)

854

766

855

def _get_all_dbus_things(self, thing):

767

def _get_all_dbus_properties(self):

856

768

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

857

769

"""

858

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

859

name),

860

athing.__get__(self))

770

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

861

771

for cls in self.__class__.__mro__

862

for name, athing in

863

inspect.getmembers(cls,

864

self._is_dbus_thing(thing)))

772

for name, prop in

773

inspect.getmembers(cls, self._is_dbus_property))

865

774

866

775

def _get_dbus_property(self, interface_name, property_name):

867

776

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

869

778

"""

870

779

for cls in self.__class__.__mro__:

871

780

for name, value in (inspect.getmembers

872

(cls,

873

self._is_dbus_thing("property"))):

781

(cls, self._is_dbus_property)):

874

782

if (value._dbus_name == property_name

875

783

and value._dbus_interface == interface_name):

876

784

return value.__get__(self)

905

813

# signatures other than "ay".

906

814

if prop._dbus_signature != "ay":

907

815

raise ValueError

908

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

909

for byte in value))

816

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

817

for byte in value))

910

818

prop(value)

911

819

912

820

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

918

826

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

919

827

"""

920

828

properties = {}

921

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

829

for name, prop in self._get_all_dbus_properties():

922

830

if (interface_name

923

831

and interface_name != prop._dbus_interface):

924

832

# Interface non-empty but did not match

939

847

path_keyword='object_path',

940

848

connection_keyword='connection')

941

849

def Introspect(self, object_path, connection):

942

"""Overloading of standard D-Bus method.

943

944

Inserts property tags and interface annotation tags.

850

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

945

851

"""

946

852

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

947

853

connection)

954

860

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

955

861

return e

956

862

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

957

# Add property tags

958

863

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

959

864

for name, prop

960

in self._get_all_dbus_things("property")

865

in self._get_all_dbus_properties()

961

866

if prop._dbus_interface

962

867

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

963

868

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)

995

869

# Add the names to the return values for the

996

870

# "org.freedesktop.DBus.Properties" methods

997

871

if (if_tag.getAttribute("name")

1012

886

except (AttributeError, xml.dom.DOMException,

1013

887

xml.parsers.expat.ExpatError) as error:

1014

888

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

1015

exc_info=error)

889

error)

1016

890

return xmlstring

1017

891

1018

892

1019

def datetime_to_dbus(dt, variant_level=0):

893

def datetime_to_dbus (dt, variant_level=0):

1020

894

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

1021

895

if dt is None:

1022

896

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

1024

898

variant_level=variant_level)

1025

899

1026

900

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).

901

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

902

.__metaclass__):

903

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

904

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

1049

905

"""

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):

906

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

907

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

908

# methods, signals, or properties in them

909

for base in (b for b in bases

910

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

911

# Go though all attributes of the base class

912

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

1057

913

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

1058

914

# with the wrong interface name

1059

915

if (not hasattr(attribute, "_dbus_interface")

1060

916

or not attribute._dbus_interface

1061

.startswith(orig_interface_name)):

917

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

1062

918

continue

1063

919

# Create an alternate D-Bus interface name based on

1064

920

# the current name

1065

921

alt_interface = (attribute._dbus_interface

1066

.replace(orig_interface_name,

1067

alt_interface_name))

1068

interface_names.add(alt_interface)

922

.replace("se.recompile.Mandos",

923

"se.bsnet.fukt.Mandos"))

1069

924

# Is this a D-Bus signal?

1070

925

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

1071

926

# Extract the original non-method function by

1086

941

nonmethod_func.func_name,

1087

942

nonmethod_func.func_defaults,

1088

943

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

1095

944

# Define a creator of a function to call both the

1096

# original and alternate functions, so both the

1097

# original and alternate signals gets sent when

1098

# the function is called

945

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

946

# signals gets sent when the function is called

1099

947

def fixscope(func1, func2):

1100

948

"""This function is a scope container to pass

1101

949

func1 and func2 to the "call_both" function

1108

956

return call_both

1109

957

# Create the "call_both" function and add it to

1110

958

# the class

1111

attr[attrname] = fixscope(attribute, new_function)

959

attr[attrname] = fixscope(attribute,

960

new_function)

1112

961

# Is this a D-Bus method?

1113

962

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

1114

963

# Create a new, but exactly alike, function

1125

974

attribute.func_name,

1126

975

attribute.func_defaults,

1127

976

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

1134

977

# Is this a D-Bus property?

1135

978

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

1136

979

# Create a new, but exactly alike, function

1150

993

attribute.func_name,

1151

994

attribute.func_defaults,

1152

995

attribute.func_closure)))

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"})

996

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

997

998

1198

999

class ClientDBus(Client, DBusObjectWithProperties):

1199

1000

"""A Client class using D-Bus

1200

1001

1211

1012

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

1212

1013

self.bus = bus

1213

1014

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

1015

1016

self._approvals_pending = 0

1214

1017

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

1215

1018

# the D-Bus

1216

1019

client_object_name = unicode(self.name).translate(

1220

1023

("/clients/" + client_object_name))

1221

1024

DBusObjectWithProperties.__init__(self, self.bus,

1222

1025

self.dbus_object_path)

1223

1026

1224

1027

def notifychangeproperty(transform_func,

1225

1028

dbus_name, type_func=lambda x: x,

1226

1029

variant_level=1):

1249

1052

1250

1053

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

1251

1054

1055

1252

1056

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1253

1057

approvals_pending = notifychangeproperty(dbus.Boolean,

1254

1058

"ApprovalPending",

1261

1065

checker is not None)

1262

1066

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1263

1067

"LastCheckedOK")

1264

last_checker_status = notifychangeproperty(dbus.Int16,

1265

"LastCheckerStatus")

1266

1068

last_approval_request = notifychangeproperty(

1267

1069

datetime_to_dbus, "LastApprovalRequest")

1268

1070

approved_by_default = notifychangeproperty(dbus.Boolean,

1269

1071

"ApprovedByDefault")

1270

approval_delay = notifychangeproperty(dbus.UInt64,

1072

approval_delay = notifychangeproperty(dbus.UInt16,

1271

1073

"ApprovalDelay",

1272

1074

type_func =

1273

timedelta_to_milliseconds)

1075

_timedelta_to_milliseconds)

1274

1076

approval_duration = notifychangeproperty(

1275

dbus.UInt64, "ApprovalDuration",

1276

type_func = timedelta_to_milliseconds)

1077

dbus.UInt16, "ApprovalDuration",

1078

type_func = _timedelta_to_milliseconds)

1277

1079

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

1278

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

1080

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

1279

1081

type_func =

1280

timedelta_to_milliseconds)

1082

_timedelta_to_milliseconds)

1281

1083

extended_timeout = notifychangeproperty(

1282

dbus.UInt64, "ExtendedTimeout",

1283

type_func = timedelta_to_milliseconds)

1284

interval = notifychangeproperty(dbus.UInt64,

1084

dbus.UInt16, "ExtendedTimeout",

1085

type_func = _timedelta_to_milliseconds)

1086

interval = notifychangeproperty(dbus.UInt16,

1285

1087

"Interval",

1286

1088

type_func =

1287

timedelta_to_milliseconds)

1089

_timedelta_to_milliseconds)

1288

1090

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

1289

1091

1290

1092

del notifychangeproperty

1332

1134

return r

1333

1135

1334

1136

def _reset_approved(self):

1335

self.approved = None

1137

self._approved = None

1336

1138

return False

1337

1139

1338

1140

def approve(self, value=True):

1339

self.approved = value

1340

gobject.timeout_add(timedelta_to_milliseconds

1141

self.send_changedstate()

1142

self._approved = value

1143

gobject.timeout_add(_timedelta_to_milliseconds

1341

1144

(self.approval_duration),

1342

1145

self._reset_approved)

1343

self.send_changedstate()

1146

1344

1147

1345

1148

## D-Bus methods, signals & properties

1346

1149

_interface = "se.recompile.Mandos.Client"

1347

1150

1348

## Interfaces

1349

1350

@dbus_interface_annotations(_interface)

1351

def _foo(self):

1352

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

1353

"false"}

1354

1355

1151

## Signals

1356

1152

1357

1153

# CheckerCompleted - signal

1393

1189

"D-Bus signal"

1394

1190

return self.need_approval()

1395

1191

1192

# NeRwequest - signal

1193

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

1194

def NewRequest(self, ip):

1195

"""D-Bus signal

1196

Is sent after a client request a password.

1197

"""

1198

pass

1199

1396

1200

## Methods

1397

1201

1398

1202

# Approve - method

1456

1260

access="readwrite")

1457

1261

def ApprovalDuration_dbus_property(self, value=None):

1458

1262

if value is None: # get

1459

return dbus.UInt64(timedelta_to_milliseconds(

1263

return dbus.UInt64(_timedelta_to_milliseconds(

1460

1264

self.approval_duration))

1461

1265

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

1462

1266

1476

1280

def Host_dbus_property(self, value=None):

1477

1281

if value is None: # get

1478

1282

return dbus.String(self.host)

1479

self.host = unicode(value)

1283

self.host = value

1480

1284

1481

1285

# Created - property

1482

1286

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

1508

1312

return

1509

1313

return datetime_to_dbus(self.last_checked_ok)

1510

1314

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

1517

1315

# Expires - property

1518

1316

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

1519

1317

def Expires_dbus_property(self):

1530

1328

def Timeout_dbus_property(self, value=None):

1531

1329

if value is None: # get

1532

1330

return dbus.UInt64(self.timeout_milliseconds())

1533

old_timeout = self.timeout

1534

1331

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

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))

1332

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

1333

return

1334

# Reschedule timeout

1335

gobject.source_remove(self.disable_initiator_tag)

1336

self.disable_initiator_tag = None

1337

self.expires = None

1338

time_to_die = _timedelta_to_milliseconds((self

1339

.last_checked_ok

1340

+ self.timeout)

1341

- datetime.datetime

1342

.utcnow())

1343

if time_to_die <= 0:

1344

# The timeout has passed

1345

self.disable()

1346

else:

1347

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

1348

+ datetime.timedelta(milliseconds =

1349

time_to_die))

1350

self.disable_initiator_tag = (gobject.timeout_add

1351

(time_to_die, self.disable))

1551

1352

1552

1353

# ExtendedTimeout - property

1553

1354

@dbus_service_property(_interface, signature="t",

1579

1380

def Checker_dbus_property(self, value=None):

1580

1381

if value is None: # get

1581

1382

return dbus.String(self.checker_command)

1582

self.checker_command = unicode(value)

1383

self.checker_command = value

1583

1384

1584

1385

# CheckerRunning - property

1585

1386

@dbus_service_property(_interface, signature="b",

1614

1415

raise KeyError()

1615

1416

1616

1417

def __getattribute__(self, name):

1617

if name == '_pipe':

1418

if(name == '_pipe'):

1618

1419

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

1619

1420

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

1620

1421

data = self._pipe.recv()

1627

1428

return func

1628

1429

1629

1430

def __setattr__(self, name, value):

1630

if name == '_pipe':

1431

if(name == '_pipe'):

1631

1432

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

1632

1433

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

1633

1434

1634

1435

1436

class ClientDBusTransitional(ClientDBus):

1437

__metaclass__ = AlternateDBusNamesMetaclass

1438

1439

1635

1440

class ClientHandler(socketserver.BaseRequestHandler, object):

1636

1441

"""A class to handle client connections.

1637

1442

1698

1503

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

1699

1504

return

1700

1505

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

1506

if self.server.use_dbus:

1507

# Emit D-Bus signal

1508

client.NewRequest(str(self.client_address))

1701

1509

1702

1510

try:

1703

1511

client = ProxyClient(child_pipe, fpr,

1719

1527

client.Rejected("Disabled")

1720

1528

return

1721

1529

1722

if client.approved or not client.approval_delay:

1530

if client._approved or not client.approval_delay:

1723

1531

#We are approved or approval is disabled

1724

1532

break

1725

elif client.approved is None:

1533

elif client._approved is None:

1726

1534

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

1727

1535

client.name)

1728

1536

if self.server.use_dbus:

1741

1549

#wait until timeout or approved

1742

1550

time = datetime.datetime.now()

1743

1551

client.changedstate.acquire()

1744

client.changedstate.wait(

1745

float(timedelta_to_milliseconds(delay)

1746

/ 1000))

1552

(client.changedstate.wait

1553

(float(client._timedelta_to_milliseconds(delay)

1554

/ 1000)))

1747

1555

client.changedstate.release()

1748

1556

time2 = datetime.datetime.now()

1749

1557

if (time2 - time) >= delay:

1765

1573

try:

1766

1574

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

1767

1575

except gnutls.errors.GNUTLSError as error:

1768

logger.warning("gnutls send failed",

1769

exc_info=error)

1576

logger.warning("gnutls send failed")

1770

1577

return

1771

1578

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

1772

1579

sent, len(client.secret)

1775

1582

1776

1583

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

1777

1584

# bump the timeout using extended_timeout

1778

client.bump_timeout(client.extended_timeout)

1585

client.checked_ok(client.extended_timeout)

1779

1586

if self.server.use_dbus:

1780

1587

# Emit D-Bus signal

1781

1588

client.GotSecret()

1786

1593

try:

1787

1594

session.bye()

1788

1595

except gnutls.errors.GNUTLSError as error:

1789

logger.warning("GnuTLS bye failed",

1790

exc_info=error)

1596

logger.warning("GnuTLS bye failed")

1791

1597

1792

1598

@staticmethod

1793

1599

def peer_certificate(session):

1858

1664

def sub_process_main(self, request, address):

1859

1665

try:

1860

1666

self.finish_request(request, address)

1861

except Exception:

1667

except:

1862

1668

self.handle_error(request, address)

1863

1669

self.close_request(request)

1864

1670

1865

1671

def process_request(self, request, address):

1866

1672

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

1867

1673

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

1868

args = (request, address))

1674

args = (request,

1675

address))

1869

1676

proc.start()

1870

1677

return proc

1871

1678

1899

1706

use_ipv6: Boolean; to use IPv6 or not

1900

1707

"""

1901

1708

def __init__(self, server_address, RequestHandlerClass,

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

"""

1709

interface=None, use_ipv6=True):

1906

1710

self.interface = interface

1907

1711

if use_ipv6:

1908

1712

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.

1935

1713

socketserver.TCPServer.__init__(self, server_address,

1936

1714

RequestHandlerClass)

1937

1938

1715

def server_bind(self):

1939

1716

"""This overrides the normal server_bind() function

1940

1717

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

1951

1728

str(self.interface

1952

1729

+ '\0'))

1953

1730

except socket.error as error:

1954

if error.errno == errno.EPERM:

1731

if error[0] == errno.EPERM:

1955

1732

logger.error("No permission to"

1956

1733

" bind to interface %s",

1957

1734

self.interface)

1958

elif error.errno == errno.ENOPROTOOPT:

1735

elif error[0] == errno.ENOPROTOOPT:

1959

1736

logger.error("SO_BINDTODEVICE not available;"

1960

1737

" cannot bind to interface %s",

1961

1738

self.interface)

1962

elif error.errno == errno.ENODEV:

1963

logger.error("Interface %s does not"

1964

" exist, cannot bind",

1965

self.interface)

1966

1739

else:

1967

1740

raise

1968

1741

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

1998

1771

"""

1999

1772

def __init__(self, server_address, RequestHandlerClass,

2000

1773

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

2001

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

1774

gnutls_priority=None, use_dbus=True):

2002

1775

self.enabled = False

2003

1776

self.clients = clients

2004

1777

if self.clients is None:

2008

1781

IPv6_TCPServer.__init__(self, server_address,

2009

1782

RequestHandlerClass,

2010

1783

interface = interface,

2011

use_ipv6 = use_ipv6,

2012

socketfd = socketfd)

1784

use_ipv6 = use_ipv6)

2013

1785

def server_activate(self):

2014

1786

if self.enabled:

2015

1787

return socketserver.TCPServer.server_activate(self)

2028

1800

2029

1801

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

2030

1802

proc = None, client_object=None):

1803

condition_names = {

1804

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

1805

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

1806

# blocking).

1807

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

1808

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

1809

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

1810

# broken, usually for pipes and

1811

# sockets).

1812

}

1813

conditions_string = ' | '.join(name

1814

for cond, name in

1815

condition_names.iteritems()

1816

if cond & condition)

2031

1817

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

2032

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

1818

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

2033

1819

# Wait for other process to exit

2034

1820

proc.join()

2035

1821

return False

2125

1911

elif suffix == "w":

2126

1912

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

2127

1913

else:

2128

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

2129

.format(suffix))

1914

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

2130

1915

except (ValueError, IndexError) as e:

2131

1916

raise ValueError(*(e.args))

2132

1917

timevalue += delta

2146

1931

sys.exit()

2147

1932

if not noclose:

2148

1933

# Close all standard open file descriptors

2149

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

1934

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

2150

1935

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

2151

1936

raise OSError(errno.ENODEV,

2152

"{0} not a character device"

2153

.format(os.devnull))

1937

"%s not a character device"

1938

% os.path.devnull)

2154

1939

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

2155

1940

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

2156

1941

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

2165

1950

2166

1951

parser = argparse.ArgumentParser()

2167

1952

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

2168

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

1953

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

2169

1954

help="show version number and exit")

2170

1955

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

2171

1956

help="Bind to interface IF")

2196

1981

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

2197

1982

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

2198

1983

" state")

2199

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

2200

help="Specify a file descriptor to a network"

2201

" socket to use instead of creating one")

2202

1984

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

2203

1985

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

2204

1986

2221

2003

"use_ipv6": "True",

2222

2004

"debuglevel": "",

2223

2005

"restore": "True",

2224

"socket": "",

2225

2006

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

2226

2007

}

2227

2008

2239

2020

if server_settings["port"]:

2240

2021

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

2241

2022

"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"])

2251

2023

del server_config

2252

2024

2253

2025

# Override the settings from the config file with command line

2255

2027

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

2256

2028

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

2257

2029

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

2258

"statedir", "socket"):

2030

"statedir"):

2259

2031

value = getattr(options, option)

2260

2032

if value is not None:

2261

2033

server_settings[option] = value

2277

2049

stored_state_file)

2278

2050

2279

2051

if debug:

2280

initlogger(debug, logging.DEBUG)

2052

initlogger(logging.DEBUG)

2281

2053

else:

2282

2054

if not debuglevel:

2283

initlogger(debug)

2055

initlogger()

2284

2056

else:

2285

2057

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

2286

initlogger(debug, level)

2058

initlogger(level)

2287

2059

2288

2060

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

2289

2061

syslogger.setFormatter(logging.Formatter

2290

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

2291

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

2292

.format(server_settings

2293

["servicename"])))

2062

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

2063

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

2064

% server_settings["servicename"]))

2294

2065

2295

2066

# Parse config file with clients

2296

client_config = configparser.SafeConfigParser(Client

2297

.client_defaults)

2067

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

2068

"extended_timeout": "15m",

2069

"interval": "2m",

2070

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

2071

"host": "",

2072

"approval_delay": "0s",

2073

"approval_duration": "1s",

2074

}

2075

client_config = configparser.SafeConfigParser(client_defaults)

2298

2076

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

2299

2077

"clients.conf"))

2300

2078

2309

2087

use_ipv6=use_ipv6,

2310

2088

gnutls_priority=

2311

2089

server_settings["priority"],

2312

use_dbus=use_dbus,

2313

socketfd=(server_settings["socket"]

2314

or None))

2090

use_dbus=use_dbus)

2315

2091

if not debug:

2316

2092

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

2317

2093

try:

2318

2094

pidfile = open(pidfilename, "w")

2319

except IOError as e:

2320

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

2321

exc_info=e)

2095

except IOError:

2096

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

2322

2097

2323

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

2098

try:

2099

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

2100

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

2101

except KeyError:

2324

2102

try:

2325

uid = pwd.getpwnam(name).pw_uid

2326

gid = pwd.getpwnam(name).pw_gid

2327

break

2103

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

2104

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

2328

2105

except KeyError:

2329

continue

2330

else:

2331

uid = 65534

2332

gid = 65534

2106

try:

2107

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

2108

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

2109

except KeyError:

2110

uid = 65534

2111

gid = 65534

2333

2112

try:

2334

2113

os.setgid(gid)

2335

2114

os.setuid(uid)

2336

2115

except OSError as error:

2337

if error.errno != errno.EPERM:

2116

if error[0] != errno.EPERM:

2338

2117

raise error

2339

2118

2340

2119

if debug:

2352

2131

.gnutls_global_set_log_function(debug_gnutls))

2353

2132

2354

2133

# Redirect stdin so all checkers get /dev/null

2355

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

2134

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

2356

2135

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

2357

2136

if null > 2:

2358

2137

os.close(null)

2138

else:

2139

# No console logging

2140

logger.removeHandler(console)

2359

2141

2360

2142

# Need to fork before connecting to D-Bus

2361

2143

if not debug:

2362

2144

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

2363

2145

daemon()

2364

2146

2365

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

2366

# need to inform gobject that threads will be used.

2367

gobject.threads_init()

2368

2369

2147

global main_loop

2370

2148

# From the Avahi example code

2371

DBusGMainLoop(set_as_default=True)

2149

DBusGMainLoop(set_as_default=True )

2372

2150

main_loop = gobject.MainLoop()

2373

2151

bus = dbus.SystemBus()

2374

2152

# End of Avahi example code

2380

2158

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

2381

2159

do_not_queue=True))

2382

2160

except dbus.exceptions.NameExistsException as e:

2383

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

2161

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

2384

2162

use_dbus = False

2385

2163

server_settings["use_dbus"] = False

2386

2164

tcp_server.use_dbus = False

2398

2176

2399

2177

client_class = Client

2400

2178

if use_dbus:

2401

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

2402

2403

client_settings = Client.config_parser(client_config)

2179

client_class = functools.partial(ClientDBusTransitional,

2180

bus = bus)

2181

2182

special_settings = {

2183

# Some settings need to be accessd by special methods;

2184

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

2185

"approved_by_default":

2186

lambda section:

2187

client_config.getboolean(section, "approved_by_default"),

2188

"enabled":

2189

lambda section:

2190

client_config.getboolean(section, "enabled"),

2191

}

2192

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

2193

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

2194

# with exceptions for any special settings as defined above

2195

client_settings = dict((clientname,

2196

dict((setting,

2197

(value

2198

if setting not in special_settings

2199

else special_settings[setting]

2200

(clientname)))

2201

for setting, value in

2202

client_config.items(clientname)))

2203

for clientname in client_config.sections())

2204

2404

2205

old_client_settings = {}

2405

clients_data = {}

2206

clients_data = []

2406

2207

2407

2208

# Get client data and settings from last running state.

2408

2209

if server_settings["restore"]:

2412

2213

(stored_state))

2413

2214

os.remove(stored_state_path)

2414

2215

except IOError as e:

2415

if e.errno == errno.ENOENT:

2416

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

2417

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

2418

else:

2419

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

2420

exc_info=e)

2216

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

2217

.format(e))

2218

if e.errno != errno.ENOENT:

2421

2219

raise

2422

except EOFError as e:

2423

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

2424

"EOFError:", exc_info=e)

2425

2220

2426

2221

with PGPEngine() as pgp:

2427

for client_name, client in clients_data.iteritems():

2222

for client in clients_data:

2223

client_name = client["name"]

2224

2428

2225

# Decide which value to use after restoring saved state.

2429

2226

# We have three different values: Old config file,

2430

2227

# new config file, and saved state.

2438

2235

if (name != "secret" and

2439

2236

value != old_client_settings[client_name]

2440

2237

[name]):

2441

client[name] = value

2238

setattr(client, name, value)

2442

2239

except KeyError:

2443

2240

pass

2444

2241

2445

2242

# Clients who has passed its expire date can still be

2446

# enabled if its last checker was successful. Clients

2447

# whose checker succeeded before we stored its state is

2448

# assumed to have successfully run all checkers during

2449

# downtime.

2450

if client["enabled"]:

2451

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

2452

if not client["last_checked_ok"]:

2453

logger.warning(

2454

"disabling client {0} - Client never "

2455

"performed a successful checker"

2456

.format(client_name))

2457

client["enabled"] = False

2458

elif client["last_checker_status"] != 0:

2459

logger.warning(

2460

"disabling client {0} - Client "

2461

"last checker failed with error code {1}"

2462

.format(client_name,

2463

client["last_checker_status"]))

2243

# enabled if its last checker was sucessful. Clients

2244

# whose checker failed before we stored its state is

2245

# assumed to have failed all checkers during downtime.

2246

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

2247

if ((datetime.datetime.utcnow()

2248

- client["last_checked_ok"])

2249

> client["interval"]):

2250

if client["last_checker_status"] != 0:

2464

2251

client["enabled"] = False

2465

2252

else:

2466

2253

client["expires"] = (datetime.datetime

2467

2254

.utcnow()

2468

2255

+ client["timeout"])

2469

logger.debug("Last checker succeeded,"

2470

" keeping {0} enabled"

2471

.format(client_name))

2256

2257

client["changedstate"] = (multiprocessing_manager

2258

.Condition

2259

(multiprocessing_manager

2260

.Lock()))

2261

if use_dbus:

2262

new_client = (ClientDBusTransitional.__new__

2263

(ClientDBusTransitional))

2264

tcp_server.clients[client_name] = new_client

2265

new_client.bus = bus

2266

for name, value in client.iteritems():

2267

setattr(new_client, name, value)

2268

client_object_name = unicode(client_name).translate(

2269

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

2270

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

2271

new_client.dbus_object_path = (dbus.ObjectPath

2272

("/clients/"

2273

+ client_object_name))

2274

DBusObjectWithProperties.__init__(new_client,

2275

new_client.bus,

2276

new_client

2277

.dbus_object_path)

2278

else:

2279

tcp_server.clients[client_name] = (Client.__new__

2280

(Client))

2281

for name, value in client.iteritems():

2282

setattr(tcp_server.clients[client_name],

2283

name, value)

2284

2472

2285

try:

2473

client["secret"] = (

2474

pgp.decrypt(client["encrypted_secret"],

2286

tcp_server.clients[client_name].secret = (

2287

pgp.decrypt(tcp_server.clients[client_name]

2288

.encrypted_secret,

2475

2289

client_settings[client_name]

2476

2290

["secret"]))

2477

2291

except PGPError:

2478

2292

# If decryption fails, we use secret from new settings

2479

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

2480

.format(client_name))

2481

client["secret"] = (

2293

tcp_server.clients[client_name].secret = (

2482

2294

client_settings[client_name]["secret"])

2483

2295

2484

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

2485

for client_name in (set(old_client_settings)

2486

- set(client_settings)):

2487

del clients_data[client_name]

2488

for client_name in (set(client_settings)

2489

- set(old_client_settings)):

2490

clients_data[client_name] = client_settings[client_name]

2491

2492

# Create all client objects

2493

for client_name, client in clients_data.iteritems():

2494

tcp_server.clients[client_name] = client_class(

2495

name = client_name, settings = client)

2296

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

2297

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

2298

del tcp_server.clients[clientname]

2299

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

2300

tcp_server.clients[clientname] = (client_class(name

2301

= clientname,

2302

config =

2303

client_settings

2304

[clientname]))

2496

2305

2497

2306

if not tcp_server.clients:

2498

2307

logger.warning("No clients defined")

2499

2308

2500

2309

if not debug:

2501

2310

try:

2502

2311

with pidfile:

2510

2319

# "pidfile" was never created

2511

2320

pass

2512

2321

del pidfilename

2322

2323

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

2513

2324

2514

2325

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

2515

2326

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

2516

2327

2517

2328

if use_dbus:

2518

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

2519

"se.bsnet.fukt.Mandos"})

2520

class MandosDBusService(DBusObjectWithProperties):

2329

class MandosDBusService(dbus.service.Object):

2521

2330

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

2522

2331

def __init__(self):

2523

2332

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

2524

2333

_interface = "se.recompile.Mandos"

2525

2334

2526

@dbus_interface_annotations(_interface)

2527

def _foo(self):

2528

return { "org.freedesktop.DBus.Property"

2529

".EmitsChangedSignal":

2530

"false"}

2531

2532

2335

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

2533

2336

def ClientAdded(self, objpath):

2534

2337

"D-Bus signal"

2576

2379

2577

2380

del _interface

2578

2381

2579

mandos_dbus_service = MandosDBusService()

2382

class MandosDBusServiceTransitional(MandosDBusService):

2383

__metaclass__ = AlternateDBusNamesMetaclass

2384

mandos_dbus_service = MandosDBusServiceTransitional()

2580

2385

2581

2386

def cleanup():

2582

2387

"Cleanup function; run on exit"

2589

2394

# Store client before exiting. Secrets are encrypted with key

2590

2395

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

2591

2396

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

2592

clients = {}

2397

clients = []

2593

2398

with PGPEngine() as pgp:

2594

2399

for client in tcp_server.clients.itervalues():

2595

2400

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

2597

2402

key)

2598

2403

client_dict = {}

2599

2404

2600

# A list of attributes that can not be pickled

2601

# + secret.

2602

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

2603

"checker"))

2405

# A list of attributes that will not be stored when

2406

# shutting down.

2407

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

2604

2408

for name, typ in (inspect.getmembers

2605

2409

(dbus.service.Object)):

2606

2410

exclude.add(name)

2611

2415

if attr not in exclude:

2612

2416

client_dict[attr] = getattr(client, attr)

2613

2417

2614

clients[client.name] = client_dict

2418

clients.append(client_dict)

2615

2419

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

2616

2420

2617

2421

try:

2618

with (tempfile.NamedTemporaryFile

2619

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

2620

dir=os.path.dirname(stored_state_path),

2621

delete=False)) as stored_state:

2422

with os.fdopen(os.open(stored_state_path,

2423

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

2424

0600), "wb") as stored_state:

2622

2425

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

2623

tempname=stored_state.name

2624

os.rename(tempname, stored_state_path)

2625

2426

except (IOError, OSError) as e:

2626

if not debug:

2627

try:

2628

os.remove(tempname)

2629

except NameError:

2630

pass

2631

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

2632

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

2633

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

2634

else:

2635

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

2636

exc_info=e)

2637

raise e

2427

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

2428

.format(e))

2429

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

2430

raise

2638

2431

2639

2432

# Delete all clients, and settings from config

2640

2433

while tcp_server.clients:

2667

2460

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

2668

2461

if use_ipv6:

2669

2462

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

2670

" flowinfo %d, scope_id %d",

2671

*tcp_server.socket.getsockname())

2463

" flowinfo %d, scope_id %d"

2464

% tcp_server.socket.getsockname())

2672

2465

else: # IPv4

2673

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

2674

*tcp_server.socket.getsockname())

2466

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

2467

% tcp_server.socket.getsockname())

2675

2468

2676

2469

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

2677

2470

2680

2473

try:

2681

2474

service.activate()

2682

2475

except dbus.exceptions.DBusException as error:

2683

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

2476

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

2684

2477

cleanup()

2685

2478

sys.exit(1)

2686

2479

# End of Avahi example code

2693

2486

logger.debug("Starting main loop")

2694

2487

main_loop.run()

2695

2488

except AvahiError as error:

2696

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

2489

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

2697

2490

cleanup()

2698

2491

sys.exit(1)

2699

2492

except KeyboardInterrupt:

2704

2497

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

2705

2498

cleanup()

2706

2499

2500

2707

2501

if __name__ == '__main__':

2708

2502

main()