/mandos/release : revision 237.7.146

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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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class CryptoError(Exception):

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class PGPError(Exception):

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

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pass

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class Crypto(object):

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class PGPEngine(object):

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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self.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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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise CryptoError(e)

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raise PGPError(e)

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self.gnupg.passphrase = None

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return ciphertext

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def decrypt(self, data, password):

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

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with open(os.devnull) 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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proc.wait()

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except IOError as e:

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raise CryptoError(e)

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raise PGPError(e)

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self.gnupg.passphrase = None

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return decrypted_plaintext

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class AvahiError(Exception):

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

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self.value = value

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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logger.critical("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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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, 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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"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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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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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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self.name = name

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if config is None:

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config = {}

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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"].upper()

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.replace(" ", ""))

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

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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.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

489

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self.checker_initiator_tag = None

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self.disable_initiator_tag = None

491

if self.enabled:

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

493

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.get("approved_by_default",

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True)

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self.approved = None

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self.approvals_pending = 0

502

self.approval_delay = string_to_delta(

503

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

507

555

.Condition(multiprocessing_manager

508

556

.Lock()))

528

576

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

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# Already enabled

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return

531

self.send_changedstate()

532

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

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self.enabled = True

534

581

self.last_enabled = datetime.datetime.utcnow()

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self.init_checker()

583

self.send_changedstate()

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584

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def disable(self, quiet=True):

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"""Disable this client."""

539

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

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return False

541

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if not quiet:

542

self.send_changedstate()

543

if not quiet:

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590

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

545

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

591

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

548

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self.expires = None

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

595

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

550

596

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

600

if not quiet:

601

self.send_changedstate()

554

602

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

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return False

556

604

560

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def init_checker(self):

561

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

562

610

# and every interval from then on.

611

if self.checker_initiator_tag is not None:

612

gobject.source_remove(self.checker_initiator_tag)

563

613

self.checker_initiator_tag = (gobject.timeout_add

564

614

(self.interval_milliseconds(),

565

615

self.start_checker))

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616

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

617

if self.disable_initiator_tag is not None:

618

gobject.source_remove(self.disable_initiator_tag)

567

619

self.disable_initiator_tag = (gobject.timeout_add

568

620

(self.timeout_milliseconds(),

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621

self.disable))

575

627

self.checker_callback_tag = None

576

628

self.checker = None

577

629

if os.WIFEXITED(condition):

578

self.last_checker_status = os.WEXITSTATUS(condition)

630

self.last_checker_status = os.WEXITSTATUS(condition)

579

631

if self.last_checker_status == 0:

580

632

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

581

633

vars(self))

588

640

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

589

641

vars(self))

590

642

591

def checked_ok(self, timeout=None):

592

"""Bump up the timeout for this client.

593

594

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

595

alive and well.

596

"""

643

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

647

self.bump_timeout()

648

649

def bump_timeout(self, timeout=None):

650

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

597

651

if timeout is None:

598

652

timeout = self.timeout

599

self.last_checked_ok = datetime.datetime.utcnow()

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653

if self.disable_initiator_tag is not None:

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654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = None

602

656

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

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self.disable_initiator_tag = (gobject.timeout_add

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(_timedelta_to_milliseconds

658

(timedelta_to_milliseconds

605

659

(timeout), self.disable))

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660

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

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661

614

668

If a checker already exists, leave it running and do

615

669

nothing."""

616

670

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

617

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

618

# 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

639

693

if self.checker is None:

694

# Escape attributes for the shell

695

escaped_attrs = dict(

696

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

697

for attr in

698

self.runtime_expansions)

640

699

try:

641

# In case checker_command has exactly one % operator

642

command = self.checker_command % self.host

643

except TypeError:

644

# Escape attributes for the shell

645

escaped_attrs = dict(

646

(attr,

647

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

648

errors=

649

'replace')))

650

for attr in

651

self.runtime_expansions)

652

653

try:

654

command = self.checker_command % escaped_attrs

655

except TypeError as error:

656

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

657

' %s', self.checker_command, error)

658

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

659

705

self.current_checker_command = command

660

706

try:

661

707

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

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713

self.checker = subprocess.Popen(command,

668

714

close_fds=True,

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715

shell=True, cwd="/")

670

self.checker_callback_tag = (gobject.child_watch_add

671

(self.checker.pid,

672

self.checker_callback,

673

data=command))

674

# The checker may have completed before the gobject

675

# watch was added. Check for this.

676

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

677

if pid:

678

gobject.source_remove(self.checker_callback_tag)

679

self.checker_callback(pid, status, command)

680

716

except OSError as error:

681

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

682

error)

717

logger.error("Failed to start subprocess",

718

exc_info=error)

719

self.checker_callback_tag = (gobject.child_watch_add

720

(self.checker.pid,

721

self.checker_callback,

722

data=command))

723

# 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)

683

729

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

684

730

return True

685

731

692

738

return

693

739

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

694

740

try:

695

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

741

self.checker.terminate()

696

742

#time.sleep(0.5)

697

743

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

698

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

744

# self.checker.kill()

699

745

except OSError as error:

700

746

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

701

747

raise

718

764

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

719

765

if byte_arrays and signature != "ay":

720

766

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

721

" signature %r" % signature)

767

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

722

768

def decorator(func):

723

769

func._dbus_is_property = True

724

770

func._dbus_interface = dbus_interface

732

778

return decorator

733

779

734

780

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

735

818

class DBusPropertyException(dbus.exceptions.DBusException):

736

819

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

737

820

"""

760

843

"""

761

844

762

845

@staticmethod

763

def _is_dbus_property(obj):

764

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)

765

854

766

def _get_all_dbus_properties(self):

855

def _get_all_dbus_things(self, thing):

767

856

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

768

857

"""

769

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

858

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

859

name),

860

athing.__get__(self))

770

861

for cls in self.__class__.__mro__

771

for name, prop in

772

inspect.getmembers(cls, self._is_dbus_property))

862

for name, athing in

863

inspect.getmembers(cls,

864

self._is_dbus_thing(thing)))

773

865

774

866

def _get_dbus_property(self, interface_name, property_name):

775

867

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

777

869

"""

778

870

for cls in self.__class__.__mro__:

779

871

for name, value in (inspect.getmembers

780

(cls, self._is_dbus_property)):

872

(cls,

873

self._is_dbus_thing("property"))):

781

874

if (value._dbus_name == property_name

782

875

and value._dbus_interface == interface_name):

783

876

return value.__get__(self)

812

905

# signatures other than "ay".

813

906

if prop._dbus_signature != "ay":

814

907

raise ValueError

815

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

816

for byte in value))

908

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

909

for byte in value))

817

910

prop(value)

818

911

819

912

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

825

918

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

826

919

"""

827

920

properties = {}

828

for name, prop in self._get_all_dbus_properties():

921

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

829

922

if (interface_name

830

923

and interface_name != prop._dbus_interface):

831

924

# Interface non-empty but did not match

846

939

path_keyword='object_path',

847

940

connection_keyword='connection')

848

941

def Introspect(self, object_path, connection):

849

"""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.

850

945

"""

851

946

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

852

947

connection)

859

954

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

860

955

return e

861

956

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

957

# Add property tags

862

958

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

863

959

for name, prop

864

in self._get_all_dbus_properties()

960

in self._get_all_dbus_things("property")

865

961

if prop._dbus_interface

866

962

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

867

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)

868

995

# Add the names to the return values for the

869

996

# "org.freedesktop.DBus.Properties" methods

870

997

if (if_tag.getAttribute("name")

885

1012

except (AttributeError, xml.dom.DOMException,

886

1013

xml.parsers.expat.ExpatError) as error:

887

1014

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

888

error)

1015

exc_info=error)

889

1016

return xmlstring

890

1017

891

1018

892

def datetime_to_dbus (dt, variant_level=0):

1019

def datetime_to_dbus(dt, variant_level=0):

893

1020

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

894

1021

if dt is None:

895

1022

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

897

1024

variant_level=variant_level)

898

1025

899

1026

900

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

901

.__metaclass__):

902

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

903

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

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).

904

1049

"""

905

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

906

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

907

# methods, signals, or properties in them

908

for base in (b for b in bases

909

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

910

# Go though all attributes of the base class

911

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

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):

912

1057

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

913

1058

# with the wrong interface name

914

1059

if (not hasattr(attribute, "_dbus_interface")

915

1060

or not attribute._dbus_interface

916

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

1061

.startswith(orig_interface_name)):

917

1062

continue

918

1063

# Create an alternate D-Bus interface name based on

919

1064

# the current name

920

1065

alt_interface = (attribute._dbus_interface

921

.replace("se.recompile.Mandos",

922

"se.bsnet.fukt.Mandos"))

1066

.replace(orig_interface_name,

1067

alt_interface_name))

1068

interface_names.add(alt_interface)

923

1069

# Is this a D-Bus signal?

924

1070

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

925

1071

# Extract the original non-method function by

940

1086

nonmethod_func.func_name,

941

1087

nonmethod_func.func_defaults,

942

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

943

1095

# Define a creator of a function to call both the

944

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

945

# 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

946

1099

def fixscope(func1, func2):

947

1100

"""This function is a scope container to pass

948

1101

func1 and func2 to the "call_both" function

955

1108

return call_both

956

1109

# Create the "call_both" function and add it to

957

1110

# the class

958

attr[attrname] = fixscope(attribute,

959

new_function)

1111

attr[attrname] = fixscope(attribute, new_function)

960

1112

# Is this a D-Bus method?

961

1113

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

962

1114

# Create a new, but exactly alike, function

973

1125

attribute.func_name,

974

1126

attribute.func_defaults,

975

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

976

1134

# Is this a D-Bus property?

977

1135

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

978

1136

# Create a new, but exactly alike, function

992

1150

attribute.func_name,

993

1151

attribute.func_defaults,

994

1152

attribute.func_closure)))

995

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

996

997

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"})

998

1198

class ClientDBus(Client, DBusObjectWithProperties):

999

1199

"""A Client class using D-Bus

1000

1200

1011

1211

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

1012

1212

self.bus = bus

1013

1213

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

1014

1015

self._approvals_pending = 0

1016

1214

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

1017

1215

# the D-Bus

1018

1216

client_object_name = unicode(self.name).translate(

1022

1220

("/clients/" + client_object_name))

1023

1221

DBusObjectWithProperties.__init__(self, self.bus,

1024

1222

self.dbus_object_path)

1025

1223

1026

1224

def notifychangeproperty(transform_func,

1027

1225

dbus_name, type_func=lambda x: x,

1028

1226

variant_level=1):

1051

1249

1052

1250

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

1053

1251

1054

1055

1252

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1056

1253

approvals_pending = notifychangeproperty(dbus.Boolean,

1057

1254

"ApprovalPending",

1064

1261

checker is not None)

1065

1262

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1066

1263

"LastCheckedOK")

1264

last_checker_status = notifychangeproperty(dbus.Int16,

1265

"LastCheckerStatus")

1067

1266

last_approval_request = notifychangeproperty(

1068

1267

datetime_to_dbus, "LastApprovalRequest")

1069

1268

approved_by_default = notifychangeproperty(dbus.Boolean,

1070

1269

"ApprovedByDefault")

1071

approval_delay = notifychangeproperty(dbus.UInt16,

1270

approval_delay = notifychangeproperty(dbus.UInt64,

1072

1271

"ApprovalDelay",

1073

1272

type_func =

1074

_timedelta_to_milliseconds)

1273

timedelta_to_milliseconds)

1075

1274

approval_duration = notifychangeproperty(

1076

dbus.UInt16, "ApprovalDuration",

1077

type_func = _timedelta_to_milliseconds)

1275

dbus.UInt64, "ApprovalDuration",

1276

type_func = timedelta_to_milliseconds)

1078

1277

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

1079

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

1278

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

1080

1279

type_func =

1081

_timedelta_to_milliseconds)

1280

timedelta_to_milliseconds)

1082

1281

extended_timeout = notifychangeproperty(

1083

dbus.UInt16, "ExtendedTimeout",

1084

type_func = _timedelta_to_milliseconds)

1085

interval = notifychangeproperty(dbus.UInt16,

1282

dbus.UInt64, "ExtendedTimeout",

1283

type_func = timedelta_to_milliseconds)

1284

interval = notifychangeproperty(dbus.UInt64,

1086

1285

"Interval",

1087

1286

type_func =

1088

_timedelta_to_milliseconds)

1287

timedelta_to_milliseconds)

1089

1288

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

1090

1289

1091

1290

del notifychangeproperty

1133

1332

return r

1134

1333

1135

1334

def _reset_approved(self):

1136

self._approved = None

1335

self.approved = None

1137

1336

return False

1138

1337

1139

1338

def approve(self, value=True):

1140

self.send_changedstate()

1141

self._approved = value

1142

gobject.timeout_add(_timedelta_to_milliseconds

1339

self.approved = value

1340

gobject.timeout_add(timedelta_to_milliseconds

1143

1341

(self.approval_duration),

1144

1342

self._reset_approved)

1145

1343

self.send_changedstate()

1146

1344

1147

1345

## D-Bus methods, signals & properties

1148

1346

_interface = "se.recompile.Mandos.Client"

1149

1347

1348

## Interfaces

1349

1350

@dbus_interface_annotations(_interface)

1351

def _foo(self):

1352

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

1353

"false"}

1354

1150

1355

## Signals

1151

1356

1152

1357

# CheckerCompleted - signal

1188

1393

"D-Bus signal"

1189

1394

return self.need_approval()

1190

1395

1191

# NeRwequest - signal

1192

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

1193

def NewRequest(self, ip):

1194

"""D-Bus signal

1195

Is sent after a client request a password.

1196

"""

1197

pass

1198

1199

1396

## Methods

1200

1397

1201

1398

# Approve - method

1259

1456

access="readwrite")

1260

1457

def ApprovalDuration_dbus_property(self, value=None):

1261

1458

if value is None: # get

1262

return dbus.UInt64(_timedelta_to_milliseconds(

1459

return dbus.UInt64(timedelta_to_milliseconds(

1263

1460

self.approval_duration))

1264

1461

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

1265

1462

1279

1476

def Host_dbus_property(self, value=None):

1280

1477

if value is None: # get

1281

1478

return dbus.String(self.host)

1282

self.host = value

1479

self.host = unicode(value)

1283

1480

1284

1481

# Created - property

1285

1482

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

1311

1508

return

1312

1509

return datetime_to_dbus(self.last_checked_ok)

1313

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

1314

1517

# Expires - property

1315

1518

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

1316

1519

def Expires_dbus_property(self):

1327

1530

def Timeout_dbus_property(self, value=None):

1328

1531

if value is None: # get

1329

1532

return dbus.UInt64(self.timeout_milliseconds())

1533

old_timeout = self.timeout

1330

1534

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

1331

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

1332

return

1333

# Reschedule timeout

1334

gobject.source_remove(self.disable_initiator_tag)

1335

self.disable_initiator_tag = None

1336

self.expires = None

1337

time_to_die = _timedelta_to_milliseconds((self

1338

.last_checked_ok

1339

+ self.timeout)

1340

- datetime.datetime

1341

.utcnow())

1342

if time_to_die <= 0:

1343

# The timeout has passed

1344

self.disable()

1345

else:

1346

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

1347

+ datetime.timedelta(milliseconds =

1348

time_to_die))

1349

self.disable_initiator_tag = (gobject.timeout_add

1350

(time_to_die, self.disable))

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))

1351

1551

1352

1552

# ExtendedTimeout - property

1353

1553

@dbus_service_property(_interface, signature="t",

1379

1579

def Checker_dbus_property(self, value=None):

1380

1580

if value is None: # get

1381

1581

return dbus.String(self.checker_command)

1382

self.checker_command = value

1582

self.checker_command = unicode(value)

1383

1583

1384

1584

# CheckerRunning - property

1385

1585

@dbus_service_property(_interface, signature="b",

1414

1614

raise KeyError()

1415

1615

1416

1616

def __getattribute__(self, name):

1417

if(name == '_pipe'):

1617

if name == '_pipe':

1418

1618

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

1419

1619

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

1420

1620

data = self._pipe.recv()

1427

1627

return func

1428

1628

1429

1629

def __setattr__(self, name, value):

1430

if(name == '_pipe'):

1630

if name == '_pipe':

1431

1631

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

1432

1632

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

1433

1633

1434

1634

1435

class ClientDBusTransitional(ClientDBus):

1436

__metaclass__ = AlternateDBusNamesMetaclass

1437

1438

1439

1635

class ClientHandler(socketserver.BaseRequestHandler, object):

1440

1636

"""A class to handle client connections.

1441

1637

1502

1698

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

1503

1699

return

1504

1700

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

1505

if self.server.use_dbus:

1506

# Emit D-Bus signal

1507

client.NewRequest(str(self.client_address))

1508

1701

1509

1702

try:

1510

1703

client = ProxyClient(child_pipe, fpr,

1526

1719

client.Rejected("Disabled")

1527

1720

return

1528

1721

1529

if client._approved or not client.approval_delay:

1722

if client.approved or not client.approval_delay:

1530

1723

#We are approved or approval is disabled

1531

1724

break

1532

elif client._approved is None:

1725

elif client.approved is None:

1533

1726

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

1534

1727

client.name)

1535

1728

if self.server.use_dbus:

1548

1741

#wait until timeout or approved

1549

1742

time = datetime.datetime.now()

1550

1743

client.changedstate.acquire()

1551

(client.changedstate.wait

1552

(float(client._timedelta_to_milliseconds(delay)

1553

/ 1000)))

1744

client.changedstate.wait(

1745

float(timedelta_to_milliseconds(delay)

1746

/ 1000))

1554

1747

client.changedstate.release()

1555

1748

time2 = datetime.datetime.now()

1556

1749

if (time2 - time) >= delay:

1572

1765

try:

1573

1766

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

1574

1767

except gnutls.errors.GNUTLSError as error:

1575

logger.warning("gnutls send failed")

1768

logger.warning("gnutls send failed",

1769

exc_info=error)

1576

1770

return

1577

1771

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

1578

1772

sent, len(client.secret)

1581

1775

1582

1776

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

1583

1777

# bump the timeout using extended_timeout

1584

client.checked_ok(client.extended_timeout)

1778

client.bump_timeout(client.extended_timeout)

1585

1779

if self.server.use_dbus:

1586

1780

# Emit D-Bus signal

1587

1781

client.GotSecret()

1592

1786

try:

1593

1787

session.bye()

1594

1788

except gnutls.errors.GNUTLSError as error:

1595

logger.warning("GnuTLS bye failed")

1789

logger.warning("GnuTLS bye failed",

1790

exc_info=error)

1596

1791

1597

1792

@staticmethod

1598

1793

def peer_certificate(session):

1663

1858

def sub_process_main(self, request, address):

1664

1859

try:

1665

1860

self.finish_request(request, address)

1666

except:

1861

except Exception:

1667

1862

self.handle_error(request, address)

1668

1863

self.close_request(request)

1669

1864

1670

1865

def process_request(self, request, address):

1671

1866

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

1672

1867

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

1673

args = (request,

1674

address))

1868

args = (request, address))

1675

1869

proc.start()

1676

1870

return proc

1677

1871

1705

1899

use_ipv6: Boolean; to use IPv6 or not

1706

1900

"""

1707

1901

def __init__(self, server_address, RequestHandlerClass,

1708

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

"""

1709

1906

self.interface = interface

1710

1907

if use_ipv6:

1711

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.

1712

1935

socketserver.TCPServer.__init__(self, server_address,

1713

1936

RequestHandlerClass)

1937

1714

1938

def server_bind(self):

1715

1939

"""This overrides the normal server_bind() function

1716

1940

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

1727

1951

str(self.interface

1728

1952

+ '\0'))

1729

1953

except socket.error as error:

1730

if error[0] == errno.EPERM:

1954

if error.errno == errno.EPERM:

1731

1955

logger.error("No permission to"

1732

1956

" bind to interface %s",

1733

1957

self.interface)

1734

elif error[0] == errno.ENOPROTOOPT:

1958

elif error.errno == errno.ENOPROTOOPT:

1735

1959

logger.error("SO_BINDTODEVICE not available;"

1736

1960

" cannot bind to interface %s",

1737

1961

self.interface)

1962

elif error.errno == errno.ENODEV:

1963

logger.error("Interface %s does not"

1964

" exist, cannot bind",

1965

self.interface)

1738

1966

else:

1739

1967

raise

1740

1968

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

1770

1998

"""

1771

1999

def __init__(self, server_address, RequestHandlerClass,

1772

2000

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

1773

gnutls_priority=None, use_dbus=True):

2001

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

1774

2002

self.enabled = False

1775

2003

self.clients = clients

1776

2004

if self.clients is None:

1780

2008

IPv6_TCPServer.__init__(self, server_address,

1781

2009

RequestHandlerClass,

1782

2010

interface = interface,

1783

use_ipv6 = use_ipv6)

2011

use_ipv6 = use_ipv6,

2012

socketfd = socketfd)

1784

2013

def server_activate(self):

1785

2014

if self.enabled:

1786

2015

return socketserver.TCPServer.server_activate(self)

1799

2028

1800

2029

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

1801

2030

proc = None, client_object=None):

1802

condition_names = {

1803

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

1804

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

1805

# blocking).

1806

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

1807

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

1808

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

1809

# broken, usually for pipes and

1810

# sockets).

1811

}

1812

conditions_string = ' | '.join(name

1813

for cond, name in

1814

condition_names.iteritems()

1815

if cond & condition)

1816

2031

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

1817

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

2032

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

1818

2033

# Wait for other process to exit

1819

2034

proc.join()

1820

2035

return False

1910

2125

elif suffix == "w":

1911

2126

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

1912

2127

else:

1913

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

2128

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

2129

.format(suffix))

1914

2130

except (ValueError, IndexError) as e:

1915

2131

raise ValueError(*(e.args))

1916

2132

timevalue += delta

1930

2146

sys.exit()

1931

2147

if not noclose:

1932

2148

# Close all standard open file descriptors

1933

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

2149

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

1934

2150

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

1935

2151

raise OSError(errno.ENODEV,

1936

"%s not a character device"

1937

% os.path.devnull)

2152

"{0} not a character device"

2153

.format(os.devnull))

1938

2154

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

1939

2155

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

1940

2156

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

1949

2165

1950

2166

parser = argparse.ArgumentParser()

1951

2167

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

1952

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

2168

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

1953

2169

help="show version number and exit")

1954

2170

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

1955

2171

help="Bind to interface IF")

1980

2196

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

1981

2197

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

1982

2198

" 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")

1983

2202

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

1984

2203

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

1985

2204

2002

2221

"use_ipv6": "True",

2003

2222

"debuglevel": "",

2004

2223

"restore": "True",

2224

"socket": "",

2005

2225

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

2006

2226

}

2007

2227

2019

2239

if server_settings["port"]:

2020

2240

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

2021

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"])

2022

2251

del server_config

2023

2252

2024

2253

# Override the settings from the config file with command line

2026

2255

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

2027

2256

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

2028

2257

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

2029

"statedir"):

2258

"statedir", "socket"):

2030

2259

value = getattr(options, option)

2031

2260

if value is not None:

2032

2261

server_settings[option] = value

2048

2277

stored_state_file)

2049

2278

2050

2279

if debug:

2051

initlogger(logging.DEBUG)

2280

initlogger(debug, logging.DEBUG)

2052

2281

else:

2053

2282

if not debuglevel:

2054

initlogger()

2283

initlogger(debug)

2055

2284

else:

2056

2285

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

2057

initlogger(level)

2286

initlogger(debug, level)

2058

2287

2059

2288

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

2060

2289

syslogger.setFormatter(logging.Formatter

2061

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

2062

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

2063

% server_settings["servicename"]))

2290

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

2291

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

2292

.format(server_settings

2293

["servicename"])))

2064

2294

2065

2295

# Parse config file with clients

2066

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

2067

"extended_timeout": "15m",

2068

"interval": "2m",

2069

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

2070

"host": "",

2071

"approval_delay": "0s",

2072

"approval_duration": "1s",

2073

}

2074

client_config = configparser.SafeConfigParser(client_defaults)

2296

client_config = configparser.SafeConfigParser(Client

2297

.client_defaults)

2075

2298

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

2076

2299

"clients.conf"))

2077

2300

2086

2309

use_ipv6=use_ipv6,

2087

2310

gnutls_priority=

2088

2311

server_settings["priority"],

2089

use_dbus=use_dbus)

2312

use_dbus=use_dbus,

2313

socketfd=(server_settings["socket"]

2314

or None))

2090

2315

if not debug:

2091

2316

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

2092

2317

try:

2093

2318

pidfile = open(pidfilename, "w")

2094

except IOError:

2095

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

2319

except IOError as e:

2320

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

2321

exc_info=e)

2096

2322

2097

try:

2098

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

2099

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

2100

except KeyError:

2323

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

2101

2324

try:

2102

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

2103

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

2325

uid = pwd.getpwnam(name).pw_uid

2326

gid = pwd.getpwnam(name).pw_gid

2327

break

2104

2328

except KeyError:

2105

try:

2106

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

2107

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

2108

except KeyError:

2109

uid = 65534

2110

gid = 65534

2329

continue

2330

else:

2331

uid = 65534

2332

gid = 65534

2111

2333

try:

2112

2334

os.setgid(gid)

2113

2335

os.setuid(uid)

2114

2336

except OSError as error:

2115

if error[0] != errno.EPERM:

2337

if error.errno != errno.EPERM:

2116

2338

raise error

2117

2339

2118

2340

if debug:

2130

2352

.gnutls_global_set_log_function(debug_gnutls))

2131

2353

2132

2354

# Redirect stdin so all checkers get /dev/null

2133

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

2355

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

2134

2356

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

2135

2357

if null > 2:

2136

2358

os.close(null)

2137

else:

2138

# No console logging

2139

logger.removeHandler(console)

2140

2359

2141

2360

# Need to fork before connecting to D-Bus

2142

2361

if not debug:

2143

2362

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

2144

2363

daemon()

2145

2364

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

2146

2369

global main_loop

2147

2370

# From the Avahi example code

2148

DBusGMainLoop(set_as_default=True )

2371

DBusGMainLoop(set_as_default=True)

2149

2372

main_loop = gobject.MainLoop()

2150

2373

bus = dbus.SystemBus()

2151

2374

# End of Avahi example code

2157

2380

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

2158

2381

do_not_queue=True))

2159

2382

except dbus.exceptions.NameExistsException as e:

2160

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

2383

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

2161

2384

use_dbus = False

2162

2385

server_settings["use_dbus"] = False

2163

2386

tcp_server.use_dbus = False

2175

2398

2176

2399

client_class = Client

2177

2400

if use_dbus:

2178

client_class = functools.partial(ClientDBusTransitional,

2179

bus = bus)

2180

2181

special_settings = {

2182

# Some settings need to be accessd by special methods;

2183

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

2184

"approved_by_default":

2185

lambda section:

2186

client_config.getboolean(section, "approved_by_default"),

2187

"enabled":

2188

lambda section:

2189

client_config.getboolean(section, "enabled"),

2190

}

2191

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

2192

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

2193

# with exceptions for any special settings as defined above

2194

client_settings = dict((clientname,

2195

dict((setting,

2196

(value

2197

if setting not in special_settings

2198

else special_settings[setting]

2199

(clientname)))

2200

for setting, value in

2201

client_config.items(clientname)))

2202

for clientname in client_config.sections())

2203

2401

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

2402

2403

client_settings = Client.config_parser(client_config)

2204

2404

old_client_settings = {}

2205

clients_data = []

2405

clients_data = {}

2206

2406

2207

2407

# Get client data and settings from last running state.

2208

2408

if server_settings["restore"]:

2212

2412

(stored_state))

2213

2413

os.remove(stored_state_path)

2214

2414

except IOError as e:

2215

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

2216

.format(e))

2217

if e.errno != errno.ENOENT:

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)

2218

2421

raise

2422

except EOFError as e:

2423

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

2424

"EOFError:", exc_info=e)

2219

2425

2220

with Crypto() as crypt:

2221

for client in clients_data:

2222

client_name = client["name"]

2223

2426

with PGPEngine() as pgp:

2427

for client_name, client in clients_data.iteritems():

2224

2428

# Decide which value to use after restoring saved state.

2225

2429

# We have three different values: Old config file,

2226

2430

# new config file, and saved state.

2234

2438

if (name != "secret" and

2235

2439

value != old_client_settings[client_name]

2236

2440

[name]):

2237

setattr(client, name, value)

2441

client[name] = value

2238

2442

except KeyError:

2239

2443

pass

2240

2444

2241

2445

# Clients who has passed its expire date can still be

2242

# enabled if its last checker was sucessful. Clients

2243

# whose checker failed before we stored its state is

2244

# assumed to have failed all checkers during downtime.

2245

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

2246

if ((datetime.datetime.utcnow()

2247

- client["last_checked_ok"])

2248

> client["interval"]):

2249

if client["last_checker_status"] != 0:

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"]))

2250

2464

client["enabled"] = False

2251

2465

else:

2252

2466

client["expires"] = (datetime.datetime

2253

2467

.utcnow()

2254

2468

+ client["timeout"])

2255

2256

client["changedstate"] = (multiprocessing_manager

2257

.Condition

2258

(multiprocessing_manager

2259

.Lock()))

2260

if use_dbus:

2261

new_client = (ClientDBusTransitional.__new__

2262

(ClientDBusTransitional))

2263

tcp_server.clients[client_name] = new_client

2264

new_client.bus = bus

2265

for name, value in client.iteritems():

2266

setattr(new_client, name, value)

2267

client_object_name = unicode(client_name).translate(

2268

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

2269

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

2270

new_client.dbus_object_path = (dbus.ObjectPath

2271

("/clients/"

2272

+ client_object_name))

2273

DBusObjectWithProperties.__init__(new_client,

2274

new_client.bus,

2275

new_client

2276

.dbus_object_path)

2277

else:

2278

tcp_server.clients[client_name] = (Client.__new__

2279

(Client))

2280

for name, value in client.iteritems():

2281

setattr(tcp_server.clients[client_name],

2282

name, value)

2283

2469

logger.debug("Last checker succeeded,"

2470

" keeping {0} enabled"

2471

.format(client_name))

2284

2472

try:

2285

tcp_server.clients[client_name].secret = (

2286

crypt.decrypt(tcp_server.clients[client_name]

2287

.encrypted_secret,

2288

client_settings[client_name]

2289

["secret"]))

2290

except CryptoError:

2473

client["secret"] = (

2474

pgp.decrypt(client["encrypted_secret"],

2475

client_settings[client_name]

2476

["secret"]))

2477

except PGPError:

2291

2478

# If decryption fails, we use secret from new settings

2292

tcp_server.clients[client_name].secret = (

2479

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

2480

.format(client_name))

2481

client["secret"] = (

2293

2482

client_settings[client_name]["secret"])

2294

2483

2295

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

2296

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

2297

del tcp_server.clients[clientname]

2298

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

2299

tcp_server.clients[clientname] = (client_class(name

2300

= clientname,

2301

config =

2302

client_settings

2303

[clientname]))

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)

2304

2496

2305

2497

if not tcp_server.clients:

2306

2498

logger.warning("No clients defined")

2307

2499

2308

2500

if not debug:

2309

2501

try:

2310

2502

with pidfile:

2318

2510

# "pidfile" was never created

2319

2511

pass

2320

2512

del pidfilename

2321

2322

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

2323

2513

2324

2514

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

2325

2515

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

2326

2516

2327

2517

if use_dbus:

2328

class MandosDBusService(dbus.service.Object):

2518

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

2519

"se.bsnet.fukt.Mandos"})

2520

class MandosDBusService(DBusObjectWithProperties):

2329

2521

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

2330

2522

def __init__(self):

2331

2523

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

2332

2524

_interface = "se.recompile.Mandos"

2333

2525

2526

@dbus_interface_annotations(_interface)

2527

def _foo(self):

2528

return { "org.freedesktop.DBus.Property"

2529

".EmitsChangedSignal":

2530

"false"}

2531

2334

2532

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

2335

2533

def ClientAdded(self, objpath):

2336

2534

"D-Bus signal"

2378

2576

2379

2577

del _interface

2380

2578

2381

class MandosDBusServiceTransitional(MandosDBusService):

2382

__metaclass__ = AlternateDBusNamesMetaclass

2383

mandos_dbus_service = MandosDBusServiceTransitional()

2579

mandos_dbus_service = MandosDBusService()

2384

2580

2385

2581

def cleanup():

2386

2582

"Cleanup function; run on exit"

2393

2589

# Store client before exiting. Secrets are encrypted with key

2394

2590

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

2395

2591

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

2396

clients = []

2397

with Crypto() as crypt:

2592

clients = {}

2593

with PGPEngine() as pgp:

2398

2594

for client in tcp_server.clients.itervalues():

2399

2595

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

2400

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

2401

key)

2596

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

2597

key)

2402

2598

client_dict = {}

2403

2599

2404

# A list of attributes that will not be stored when

2405

# shutting down.

2406

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

2600

# A list of attributes that can not be pickled

2601

# + secret.

2602

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

2603

"checker"))

2407

2604

for name, typ in (inspect.getmembers

2408

2605

(dbus.service.Object)):

2409

2606

exclude.add(name)

2414

2611

if attr not in exclude:

2415

2612

client_dict[attr] = getattr(client, attr)

2416

2613

2417

clients.append(client_dict)

2614

clients[client.name] = client_dict

2418

2615

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

2419

2616

2420

2617

try:

2421

with os.fdopen(os.open(stored_state_path,

2422

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

2423

0600), "wb") as stored_state:

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:

2424

2622

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

2623

tempname=stored_state.name

2624

os.rename(tempname, stored_state_path)

2425

2625

except (IOError, OSError) as e:

2426

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

2427

.format(e))

2428

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

2429

raise

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

2430

2638

2431

2639

# Delete all clients, and settings from config

2432

2640

while tcp_server.clients:

2459

2667

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

2460

2668

if use_ipv6:

2461

2669

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

2462

" flowinfo %d, scope_id %d"

2463

% tcp_server.socket.getsockname())

2670

" flowinfo %d, scope_id %d",

2671

*tcp_server.socket.getsockname())

2464

2672

else: # IPv4

2465

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

2466

% tcp_server.socket.getsockname())

2673

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

2674

*tcp_server.socket.getsockname())

2467

2675

2468

2676

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

2469

2677

2472

2680

try:

2473

2681

service.activate()

2474

2682

except dbus.exceptions.DBusException as error:

2475

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

2683

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

2476

2684

cleanup()

2477

2685

sys.exit(1)

2478

2686

# End of Avahi example code

2485

2693

logger.debug("Starting main loop")

2486

2694

main_loop.run()

2487

2695

except AvahiError as error:

2488

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

2696

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

2489

2697

cleanup()

2490

2698

sys.exit(1)

2491

2699

except KeyboardInterrupt:

2496

2704

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

2497

2705

cleanup()

2498

2706

2499

2500

2707

if __name__ == '__main__':

2501

2708

main()