/mandos/release : revision 237.7.127

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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 = "1.5.3"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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return interface_index

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def initlogger(level=logging.WARNING):

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

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"""init logger and add loglevel"""

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syslogger.setFormatter(logging.Formatter

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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self.gnupg.options.extra_args.extend(['--force-mdc',

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'--quiet'])

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'--quiet',

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'--no-use-agent'])

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def __enter__(self):

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return self

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def encrypt(self, data, password):

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

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with open(os.devnull) as devnull:

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

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try:

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

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

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def decrypt(self, data, password):

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

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with open(os.devnull) as devnull:

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

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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

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f.write(data)

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

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decrypted_plaintext = f.read()

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return decrypted_plaintext

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class AvahiError(Exception):

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

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self.value = value

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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unicode(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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

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.format(error))

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def cleanup(self):

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

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if self.group is not None:

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pass

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self.group = None

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self.remove()

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

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

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

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

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else:

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

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def activate(self):

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

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if self.server is None:

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"""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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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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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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def approval_delay_milliseconds(self):

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

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

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

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

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

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with exceptions for any special settings as defined above.

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

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value given the same arguments.

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"""

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settings = {}

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for client_name in config.sections():

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section = dict(config.items(client_name))

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# Reformat values from string types to Python types

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client["approved_by_default"] = config.getboolean(

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client_name, "approved_by_default")

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

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

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"enabled")

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

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.replace(" ", ""))

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"rb") as secfile:

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

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else:

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

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% section)

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

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.format(section))

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

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client["extended_timeout"] = string_to_delta(

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section["extended_timeout"])

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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"] = None

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if client["enabled"]:

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client["last_enabled"] = datetime.datetime.utcnow()

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client["expires"] = (datetime.datetime.utcnow()

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+ client["timeout"])

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else:

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client["last_enabled"] = None

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client["expires"] = 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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"""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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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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logger.debug(" Fingerprint: %s", self.fingerprint)

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self.created = settings.get("created", datetime.datetime.utcnow())

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self.created = settings.get("created",

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datetime.datetime.utcnow())

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# attributes specific for this server instance

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self.checker = None

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self.checker_initiator_tag = None

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

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vars(self))

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def checked_ok(self, timeout=None):

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"""Bump up the timeout for this client.

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

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alive and well.

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"""

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def checked_ok(self):

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

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self.last_checked_ok = datetime.datetime.utcnow()

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self.last_checker_status = 0

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self.bump_timeout()

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def bump_timeout(self, timeout=None):

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

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if timeout is None:

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timeout = self.timeout

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self.last_checked_ok = datetime.datetime.utcnow()

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if self.disable_initiator_tag is not None:

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gobject.source_remove(self.disable_initiator_tag)

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

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If a checker already exists, leave it running and do

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nothing."""

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

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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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# 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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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":'

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' %s', self.checker_command, error)

701

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

702

self.checker_command, exc_info=error)

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return True # Try again later

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self.current_checker_command = command

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try:

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gobject.source_remove(self.checker_callback_tag)

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self.checker_callback(pid, status, command)

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except OSError as error:

709

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

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error)

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logger.error("Failed to start subprocess",

727

exc_info=error)

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

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return True

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return

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

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try:

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

740

self.checker.terminate()

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741

#time.sleep(0.5)

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

726

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

743

# self.checker.kill()

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744

except OSError as error:

728

745

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

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raise

746

763

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

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764

if byte_arrays and signature != "ay":

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765

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

749

" signature %r" % signature)

766

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

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767

def decorator(func):

751

768

func._dbus_is_property = True

752

769

func._dbus_interface = dbus_interface

760

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return decorator

761

778

762

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def dbus_interface_annotations(dbus_interface):

781

"""Decorator for marking functions returning interface annotations

782

783

Usage:

784

785

@dbus_interface_annotations("org.example.Interface")

786

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

787

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

788

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

789

"false"}

790

"""

791

def decorator(func):

792

func._dbus_is_interface = True

793

func._dbus_interface = dbus_interface

794

func._dbus_name = dbus_interface

795

return func

796

return decorator

797

798

799

def dbus_annotations(annotations):

800

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

801

Usage:

802

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

804

access="r")

805

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

806

"org.freedesktop.DBus.Property."

807

"EmitsChangedSignal": "false"})

808

def Property_dbus_property(self):

809

return dbus.Boolean(False)

810

"""

811

def decorator(func):

812

func._dbus_annotations = annotations

813

return func

814

return decorator

815

816

763

817

class DBusPropertyException(dbus.exceptions.DBusException):

764

818

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

765

819

"""

788

842

"""

789

843

790

844

@staticmethod

791

def _is_dbus_property(obj):

792

return getattr(obj, "_dbus_is_property", False)

845

def _is_dbus_thing(thing):

846

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

847

848

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

849

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

850

"""

851

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

852

False)

793

853

794

def _get_all_dbus_properties(self):

854

def _get_all_dbus_things(self, thing):

795

855

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

796

856

"""

797

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

857

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

858

name),

859

athing.__get__(self))

798

860

for cls in self.__class__.__mro__

799

for name, prop in

800

inspect.getmembers(cls, self._is_dbus_property))

861

for name, athing in

862

inspect.getmembers(cls,

863

self._is_dbus_thing(thing)))

801

864

802

865

def _get_dbus_property(self, interface_name, property_name):

803

866

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

805

868

"""

806

869

for cls in self.__class__.__mro__:

807

870

for name, value in (inspect.getmembers

808

(cls, self._is_dbus_property)):

871

(cls,

872

self._is_dbus_thing("property"))):

809

873

if (value._dbus_name == property_name

810

874

and value._dbus_interface == interface_name):

811

875

return value.__get__(self)

840

904

# signatures other than "ay".

841

905

if prop._dbus_signature != "ay":

842

906

raise ValueError

843

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

844

for byte in value))

907

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

908

for byte in value))

845

909

prop(value)

846

910

847

911

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

853

917

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

854

918

"""

855

919

properties = {}

856

for name, prop in self._get_all_dbus_properties():

920

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

857

921

if (interface_name

858

922

and interface_name != prop._dbus_interface):

859

923

# Interface non-empty but did not match

874

938

path_keyword='object_path',

875

939

connection_keyword='connection')

876

940

def Introspect(self, object_path, connection):

877

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

941

"""Overloading of standard D-Bus method.

942

943

Inserts property tags and interface annotation tags.

878

944

"""

879

945

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

880

946

connection)

887

953

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

888

954

return e

889

955

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

956

# Add property tags

890

957

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

891

958

for name, prop

892

in self._get_all_dbus_properties()

959

in self._get_all_dbus_things("property")

893

960

if prop._dbus_interface

894

961

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

895

962

if_tag.appendChild(tag)

963

# Add annotation tags

964

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

965

for tag in if_tag.getElementsByTagName(typ):

966

annots = dict()

967

for name, prop in (self.

968

_get_all_dbus_things(typ)):

969

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

970

and prop._dbus_interface

971

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

972

annots.update(getattr

973

(prop,

974

"_dbus_annotations",

975

{}))

976

for name, value in annots.iteritems():

977

ann_tag = document.createElement(

978

"annotation")

979

ann_tag.setAttribute("name", name)

980

ann_tag.setAttribute("value", value)

981

tag.appendChild(ann_tag)

982

# Add interface annotation tags

983

for annotation, value in dict(

984

itertools.chain.from_iterable(

985

annotations().iteritems()

986

for name, annotations in

987

self._get_all_dbus_things("interface")

988

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

989

)).iteritems():

990

ann_tag = document.createElement("annotation")

991

ann_tag.setAttribute("name", annotation)

992

ann_tag.setAttribute("value", value)

993

if_tag.appendChild(ann_tag)

896

994

# Add the names to the return values for the

897

995

# "org.freedesktop.DBus.Properties" methods

898

996

if (if_tag.getAttribute("name")

913

1011

except (AttributeError, xml.dom.DOMException,

914

1012

xml.parsers.expat.ExpatError) as error:

915

1013

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

916

error)

1014

exc_info=error)

917

1015

return xmlstring

918

1016

919

1017

925

1023

variant_level=variant_level)

926

1024

927

1025

928

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

929

.__metaclass__):

930

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

931

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

1026

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1027

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

1028

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

1029

interface names according to the "alt_interface_names" mapping.

1030

Usage:

1031

1032

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

1033

"net.example.AlternateInterface"})

1034

class SampleDBusObject(dbus.service.Object):

1035

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

1036

def SampleDBusMethod():

1037

pass

1038

1039

The above "SampleDBusMethod" on "SampleDBusObject" will be

1040

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

1041

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

1042

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

1043

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

1044

1045

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

1046

(from DBusObjectWithProperties) and interfaces (from the

1047

dbus_interface_annotations decorator).

932

1048

"""

933

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

934

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

935

# methods, signals, or properties in them

936

for base in (b for b in bases

937

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

938

# Go though all attributes of the base class

939

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

1049

def wrapper(cls):

1050

for orig_interface_name, alt_interface_name in (

1051

alt_interface_names.iteritems()):

1052

attr = {}

1053

interface_names = set()

1054

# Go though all attributes of the class

1055

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

940

1056

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

941

1057

# with the wrong interface name

942

1058

if (not hasattr(attribute, "_dbus_interface")

943

1059

or not attribute._dbus_interface

944

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

1060

.startswith(orig_interface_name)):

945

1061

continue

946

1062

# Create an alternate D-Bus interface name based on

947

1063

# the current name

948

1064

alt_interface = (attribute._dbus_interface

949

.replace("se.recompile.Mandos",

950

"se.bsnet.fukt.Mandos"))

1065

.replace(orig_interface_name,

1066

alt_interface_name))

1067

interface_names.add(alt_interface)

951

1068

# Is this a D-Bus signal?

952

1069

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

953

1070

# Extract the original non-method function by

968

1085

nonmethod_func.func_name,

969

1086

nonmethod_func.func_defaults,

970

1087

nonmethod_func.func_closure)))

1088

# Copy annotations, if any

1089

try:

1090

new_function._dbus_annotations = (

1091

dict(attribute._dbus_annotations))

1092

except AttributeError:

1093

pass

971

1094

# Define a creator of a function to call both the

972

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

973

# signals gets sent when the function is called

1095

# original and alternate functions, so both the

1096

# original and alternate signals gets sent when

1097

# the function is called

974

1098

def fixscope(func1, func2):

975

1099

"""This function is a scope container to pass

976

1100

func1 and func2 to the "call_both" function

983

1107

return call_both

984

1108

# Create the "call_both" function and add it to

985

1109

# the class

986

attr[attrname] = fixscope(attribute,

987

new_function)

1110

attr[attrname] = fixscope(attribute, new_function)

988

1111

# Is this a D-Bus method?

989

1112

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

990

1113

# Create a new, but exactly alike, function

1001

1124

attribute.func_name,

1002

1125

attribute.func_defaults,

1003

1126

attribute.func_closure)))

1127

# Copy annotations, if any

1128

try:

1129

attr[attrname]._dbus_annotations = (

1130

dict(attribute._dbus_annotations))

1131

except AttributeError:

1132

pass

1004

1133

# Is this a D-Bus property?

1005

1134

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

1006

1135

# Create a new, but exactly alike, function

1020

1149

attribute.func_name,

1021

1150

attribute.func_defaults,

1022

1151

attribute.func_closure)))

1023

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

1024

1025

1152

# Copy annotations, if any

1153

try:

1154

attr[attrname]._dbus_annotations = (

1155

dict(attribute._dbus_annotations))

1156

except AttributeError:

1157

pass

1158

# Is this a D-Bus interface?

1159

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

1160

# Create a new, but exactly alike, function

1161

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

1162

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

1163

# to the class.

1164

attr[attrname] = (dbus_interface_annotations

1165

(alt_interface)

1166

(types.FunctionType

1167

(attribute.func_code,

1168

attribute.func_globals,

1169

attribute.func_name,

1170

attribute.func_defaults,

1171

attribute.func_closure)))

1172

if deprecate:

1173

# Deprecate all alternate interfaces

1174

iname="_AlternateDBusNames_interface_annotation{0}"

1175

for interface_name in interface_names:

1176

@dbus_interface_annotations(interface_name)

1177

def func(self):

1178

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

1179

"true" }

1180

# Find an unused name

1181

for aname in (iname.format(i)

1182

for i in itertools.count()):

1183

if aname not in attr:

1184

attr[aname] = func

1185

break

1186

if interface_names:

1187

# Replace the class with a new subclass of it with

1188

# methods, signals, etc. as created above.

1189

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

1190

(cls,), attr)

1191

return cls

1192

return wrapper

1193

1194

1195

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

1196

"se.bsnet.fukt.Mandos"})

1026

1197

class ClientDBus(Client, DBusObjectWithProperties):

1027

1198

"""A Client class using D-Bus

1028

1199

1039

1210

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

1040

1211

self.bus = bus

1041

1212

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

1042

self._approvals_pending = 0

1043

1044

self._approvals_pending = 0

1045

1213

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

1046

1214

# the D-Bus

1047

1215

client_object_name = unicode(self.name).translate(

1051

1219

("/clients/" + client_object_name))

1052

1220

DBusObjectWithProperties.__init__(self, self.bus,

1053

1221

self.dbus_object_path)

1054

1222

1055

1223

def notifychangeproperty(transform_func,

1056

1224

dbus_name, type_func=lambda x: x,

1057

1225

variant_level=1):

1080

1248

1081

1249

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

1082

1250

1083

1084

1251

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1085

1252

approvals_pending = notifychangeproperty(dbus.Boolean,

1086

1253

"ApprovalPending",

1093

1260

checker is not None)

1094

1261

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1095

1262

"LastCheckedOK")

1263

last_checker_status = notifychangeproperty(dbus.Int16,

1264

"LastCheckerStatus")

1096

1265

last_approval_request = notifychangeproperty(

1097

1266

datetime_to_dbus, "LastApprovalRequest")

1098

1267

approved_by_default = notifychangeproperty(dbus.Boolean,

1172

1341

(self.approval_duration),

1173

1342

self._reset_approved)

1174

1343

1175

1176

1344

## D-Bus methods, signals & properties

1177

1345

_interface = "se.recompile.Mandos.Client"

1178

1346

1347

## Interfaces

1348

1349

@dbus_interface_annotations(_interface)

1350

def _foo(self):

1351

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

1352

"false"}

1353

1179

1354

## Signals

1180

1355

1181

1356

# CheckerCompleted - signal

1217

1392

"D-Bus signal"

1218

1393

return self.need_approval()

1219

1394

1220

# NeRwequest - signal

1221

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

1222

def NewRequest(self, ip):

1223

"""D-Bus signal

1224

Is sent after a client request a password.

1225

"""

1226

pass

1227

1228

1395

## Methods

1229

1396

1230

1397

# Approve - method

1340

1507

return

1341

1508

return datetime_to_dbus(self.last_checked_ok)

1342

1509

1510

# LastCheckerStatus - property

1511

@dbus_service_property(_interface, signature="n",

1512

access="read")

1513

def LastCheckerStatus_dbus_property(self):

1514

return dbus.Int16(self.last_checker_status)

1515

1343

1516

# Expires - property

1344

1517

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

1345

1518

def Expires_dbus_property(self):

1357

1530

if value is None: # get

1358

1531

return dbus.UInt64(self.timeout_milliseconds())

1359

1532

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

1360

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

1361

return

1362

1533

# Reschedule timeout

1363

gobject.source_remove(self.disable_initiator_tag)

1364

self.disable_initiator_tag = None

1365

self.expires = None

1366

time_to_die = timedelta_to_milliseconds((self

1367

.last_checked_ok

1368

+ self.timeout)

1369

- datetime.datetime

1370

.utcnow())

1371

if time_to_die <= 0:

1372

# The timeout has passed

1373

self.disable()

1374

else:

1375

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

1376

+ datetime.timedelta(milliseconds =

1377

time_to_die))

1378

self.disable_initiator_tag = (gobject.timeout_add

1379

(time_to_die, self.disable))

1534

if self.enabled:

1535

now = datetime.datetime.utcnow()

1536

time_to_die = timedelta_to_milliseconds(

1537

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

1538

if time_to_die <= 0:

1539

# The timeout has passed

1540

self.disable()

1541

else:

1542

self.expires = (now +

1543

datetime.timedelta(milliseconds =

1544

time_to_die))

1545

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

1546

is None):

1547

return

1548

gobject.source_remove(self.disable_initiator_tag)

1549

self.disable_initiator_tag = (gobject.timeout_add

1550

(time_to_die,

1551

self.disable))

1380

1552

1381

1553

# ExtendedTimeout - property

1382

1554

@dbus_service_property(_interface, signature="t",

1461

1633

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

1462

1634

1463

1635

1464

class ClientDBusTransitional(ClientDBus):

1465

__metaclass__ = AlternateDBusNamesMetaclass

1466

1467

1468

1636

class ClientHandler(socketserver.BaseRequestHandler, object):

1469

1637

"""A class to handle client connections.

1470

1638

1538

1706

except KeyError:

1539

1707

return

1540

1708

1541

if self.server.use_dbus:

1542

# Emit D-Bus signal

1543

client.NewRequest(str(self.client_address))

1544

1545

1709

if client.approval_delay:

1546

1710

delay = client.approval_delay

1547

1711

client.approvals_pending += 1

1602

1766

try:

1603

1767

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

1604

1768

except gnutls.errors.GNUTLSError as error:

1605

logger.warning("gnutls send failed")

1769

logger.warning("gnutls send failed",

1770

exc_info=error)

1606

1771

return

1607

1772

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

1608

1773

sent, len(client.secret)

1611

1776

1612

1777

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

1613

1778

# bump the timeout using extended_timeout

1614

client.checked_ok(client.extended_timeout)

1779

client.bump_timeout(client.extended_timeout)

1615

1780

if self.server.use_dbus:

1616

1781

# Emit D-Bus signal

1617

1782

client.GotSecret()

1622

1787

try:

1623

1788

session.bye()

1624

1789

except gnutls.errors.GNUTLSError as error:

1625

logger.warning("GnuTLS bye failed")

1790

logger.warning("GnuTLS bye failed",

1791

exc_info=error)

1626

1792

1627

1793

@staticmethod

1628

1794

def peer_certificate(session):

1700

1866

def process_request(self, request, address):

1701

1867

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

1702

1868

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

1703

args = (request,

1704

address))

1869

args = (request, address))

1705

1870

proc.start()

1706

1871

return proc

1707

1872

1829

1994

1830

1995

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

1831

1996

proc = None, client_object=None):

1832

condition_names = {

1833

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

1834

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

1835

# blocking).

1836

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

1837

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

1838

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

1839

# broken, usually for pipes and

1840

# sockets).

1841

}

1842

conditions_string = ' | '.join(name

1843

for cond, name in

1844

condition_names.iteritems()

1845

if cond & condition)

1846

1997

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

1847

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

1998

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

1848

1999

# Wait for other process to exit

1849

2000

proc.join()

1850

2001

return False

1940

2091

elif suffix == "w":

1941

2092

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

1942

2093

else:

1943

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

2094

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

2095

.format(suffix))

1944

2096

except (ValueError, IndexError) as e:

1945

2097

raise ValueError(*(e.args))

1946

2098

timevalue += delta

1960

2112

sys.exit()

1961

2113

if not noclose:

1962

2114

# Close all standard open file descriptors

1963

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

2115

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

1964

2116

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

1965

2117

raise OSError(errno.ENODEV,

1966

"%s not a character device"

1967

% os.path.devnull)

2118

"{0} not a character device"

2119

.format(os.devnull))

1968

2120

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

1969

2121

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

1970

2122

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

1979

2131

1980

2132

parser = argparse.ArgumentParser()

1981

2133

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

1982

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

2134

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

1983

2135

help="show version number and exit")

1984

2136

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

1985

2137

help="Bind to interface IF")

2078

2230

stored_state_file)

2079

2231

2080

2232

if debug:

2081

initlogger(logging.DEBUG)

2233

initlogger(debug, logging.DEBUG)

2082

2234

else:

2083

2235

if not debuglevel:

2084

initlogger()

2236

initlogger(debug)

2085

2237

else:

2086

2238

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

2087

initlogger(level)

2239

initlogger(debug, level)

2088

2240

2089

2241

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

2090

2242

syslogger.setFormatter(logging.Formatter

2091

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

2092

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

2093

% server_settings["servicename"]))

2243

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

2244

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

2245

.format(server_settings

2246

["servicename"])))

2094

2247

2095

2248

# Parse config file with clients

2096

client_config = configparser.SafeConfigParser(Client.client_defaults)

2249

client_config = configparser.SafeConfigParser(Client

2250

.client_defaults)

2097

2251

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

2098

2252

"clients.conf"))

2099

2253

2113

2267

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

2114

2268

try:

2115

2269

pidfile = open(pidfilename, "w")

2116

except IOError:

2117

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

2270

except IOError as e:

2271

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

2272

exc_info=e)

2118

2273

2119

try:

2120

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

2121

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

2122

except KeyError:

2274

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

2123

2275

try:

2124

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

2125

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

2276

uid = pwd.getpwnam(name).pw_uid

2277

gid = pwd.getpwnam(name).pw_gid

2278

break

2126

2279

except KeyError:

2127

try:

2128

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

2129

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

2130

except KeyError:

2131

uid = 65534

2132

gid = 65534

2280

continue

2281

else:

2282

uid = 65534

2283

gid = 65534

2133

2284

try:

2134

2285

os.setgid(gid)

2135

2286

os.setuid(uid)

2152

2303

.gnutls_global_set_log_function(debug_gnutls))

2153

2304

2154

2305

# Redirect stdin so all checkers get /dev/null

2155

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

2306

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

2156

2307

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

2157

2308

if null > 2:

2158

2309

os.close(null)

2159

else:

2160

# No console logging

2161

logger.removeHandler(console)

2162

2310

2163

2311

# Need to fork before connecting to D-Bus

2164

2312

if not debug:

2165

2313

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

2166

2314

daemon()

2167

2315

2316

gobject.threads_init()

2317

2168

2318

global main_loop

2169

2319

# From the Avahi example code

2170

DBusGMainLoop(set_as_default=True )

2320

DBusGMainLoop(set_as_default=True)

2171

2321

main_loop = gobject.MainLoop()

2172

2322

bus = dbus.SystemBus()

2173

2323

# End of Avahi example code

2179

2329

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

2180

2330

do_not_queue=True))

2181

2331

except dbus.exceptions.NameExistsException as e:

2182

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

2332

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

2183

2333

use_dbus = False

2184

2334

server_settings["use_dbus"] = False

2185

2335

tcp_server.use_dbus = False

2197

2347

2198

2348

client_class = Client

2199

2349

if use_dbus:

2200

client_class = functools.partial(ClientDBusTransitional,

2201

bus = bus)

2350

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

2202

2351

2203

2352

client_settings = Client.config_parser(client_config)

2204

2353

old_client_settings = {}

2212

2361

(stored_state))

2213

2362

os.remove(stored_state_path)

2214

2363

except IOError as e:

2215

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

2216

.format(e))

2217

if e.errno != errno.ENOENT:

2364

if e.errno == errno.ENOENT:

2365

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

2366

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

2367

else:

2368

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

2369

exc_info=e)

2218

2370

raise

2371

except EOFError as e:

2372

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

2373

"EOFError:", exc_info=e)

2219

2374

2220

2375

with PGPEngine() as pgp:

2221

2376

for client_name, client in clients_data.iteritems():

2238

2393

2239

2394

# Clients who has passed its expire date can still be

2240

2395

# enabled if its last checker was successful. Clients

2241

# whose checker failed before we stored its state is

2242

# assumed to have failed all checkers during downtime.

2396

# whose checker succeeded before we stored its state is

2397

# assumed to have successfully run all checkers during

2398

# downtime.

2243

2399

if client["enabled"]:

2244

2400

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

2245

2401

if not client["last_checked_ok"]:

2246

2402

logger.warning(

2247

2403

"disabling client {0} - Client never "

2248

"performed a successfull checker"

2249

.format(client["name"]))

2404

"performed a successful checker"

2405

.format(client_name))

2250

2406

client["enabled"] = False

2251

2407

elif client["last_checker_status"] != 0:

2252

2408

logger.warning(

2253

2409

"disabling client {0} - Client "

2254

2410

"last checker failed with error code {1}"

2255

.format(client["name"],

2411

.format(client_name,

2256

2412

client["last_checker_status"]))

2257

2413

client["enabled"] = False

2258

2414

else:

2259

2415

client["expires"] = (datetime.datetime

2260

2416

.utcnow()

2261

2417

+ client["timeout"])

2262

2418

logger.debug("Last checker succeeded,"

2419

" keeping {0} enabled"

2420

.format(client_name))

2263

2421

try:

2264

2422

client["secret"] = (

2265

2423

pgp.decrypt(client["encrypted_secret"],

2271

2429

.format(client_name))

2272

2430

client["secret"] = (

2273

2431

client_settings[client_name]["secret"])

2274

2275

2432

2276

2433

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

2277

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

2434

for client_name in (set(old_client_settings)

2435

- set(client_settings)):

2278

2436

del clients_data[client_name]

2279

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

2437

for client_name in (set(client_settings)

2438

- set(old_client_settings)):

2280

2439

clients_data[client_name] = client_settings[client_name]

2281

2282

# Create clients all clients

2440

2441

# Create all client objects

2283

2442

for client_name, client in clients_data.iteritems():

2284

2443

tcp_server.clients[client_name] = client_class(

2285

2444

name = client_name, settings = client)

2286

2445

2287

2446

if not tcp_server.clients:

2288

2447

logger.warning("No clients defined")

2289

2448

2290

2449

if not debug:

2291

2450

try:

2292

2451

with pidfile:

2306

2465

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

2307

2466

2308

2467

if use_dbus:

2309

class MandosDBusService(dbus.service.Object):

2468

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

2469

"se.bsnet.fukt.Mandos"})

2470

class MandosDBusService(DBusObjectWithProperties):

2310

2471

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

2311

2472

def __init__(self):

2312

2473

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

2313

2474

_interface = "se.recompile.Mandos"

2314

2475

2476

@dbus_interface_annotations(_interface)

2477

def _foo(self):

2478

return { "org.freedesktop.DBus.Property"

2479

".EmitsChangedSignal":

2480

"false"}

2481

2315

2482

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

2316

2483

def ClientAdded(self, objpath):

2317

2484

"D-Bus signal"

2359

2526

2360

2527

del _interface

2361

2528

2362

class MandosDBusServiceTransitional(MandosDBusService):

2363

__metaclass__ = AlternateDBusNamesMetaclass

2364

mandos_dbus_service = MandosDBusServiceTransitional()

2529

mandos_dbus_service = MandosDBusService()

2365

2530

2366

2531

def cleanup():

2367

2532

"Cleanup function; run on exit"

2400

2565

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

2401

2566

2402

2567

try:

2403

with os.fdopen(os.open(stored_state_path,

2404

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

2405

0600), "wb") as stored_state:

2568

with (tempfile.NamedTemporaryFile

2569

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

2570

dir=os.path.dirname(stored_state_path),

2571

delete=False)) as stored_state:

2406

2572

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

2573

tempname=stored_state.name

2574

os.rename(tempname, stored_state_path)

2407

2575

except (IOError, OSError) as e:

2408

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

2409

.format(e))

2410

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

2411

raise

2576

if not debug:

2577

try:

2578

os.remove(tempname)

2579

except NameError:

2580

pass

2581

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

2582

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

2583

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

2584

else:

2585

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

2586

exc_info=e)

2587

raise e

2412

2588

2413

2589

# Delete all clients, and settings from config

2414

2590

while tcp_server.clients:

2441

2617

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

2442

2618

if use_ipv6:

2443

2619

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

2444

" flowinfo %d, scope_id %d"

2445

% tcp_server.socket.getsockname())

2620

" flowinfo %d, scope_id %d",

2621

*tcp_server.socket.getsockname())

2446

2622

else: # IPv4

2447

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

2448

% tcp_server.socket.getsockname())

2623

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

2624

*tcp_server.socket.getsockname())

2449

2625

2450

2626

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

2451

2627

2454

2630

try:

2455

2631

service.activate()

2456

2632

except dbus.exceptions.DBusException as error:

2457

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

2633

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

2458

2634

cleanup()

2459

2635

sys.exit(1)

2460

2636

# End of Avahi example code

2467

2643

logger.debug("Starting main loop")

2468

2644

main_loop.run()

2469

2645

except AvahiError as error:

2470

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

2646

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

2471

2647

cleanup()

2472

2648

sys.exit(1)

2473

2649

except KeyboardInterrupt: