/mandos/trunk : revision 595

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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import SocketServer as socketserver

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import socket

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import argparse

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import types

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import binascii

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import tempfile

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import itertools

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import dbus

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import dbus.service

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.5.1"

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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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def __enter__(self):

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return self

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def __exit__ (self, exc_type, exc_value, traceback):

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def __exit__(self, exc_type, exc_value, traceback):

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self._cleanup()

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return False

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def encrypt(self, data, password):

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

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with open(os.devnull) as devnull:

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

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try:

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

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

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def decrypt(self, data, password):

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

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with open(os.devnull) as devnull:

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

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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

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f.write(data)

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

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decrypted_plaintext = f.read()

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return decrypted_plaintext

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class AvahiError(Exception):

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

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self.value = value

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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unicode(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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

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.format(error))

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def cleanup(self):

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

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if self.group is not None:

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pass

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self.group = None

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self.remove()

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

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

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

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

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else:

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

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def activate(self):

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

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if self.server is None:

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self.server_state_changed)

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

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class AvahiServiceToSyslog(AvahiService):

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def rename(self):

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

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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

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

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.format(self.name)))

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return ret

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def timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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class Client(object):

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

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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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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

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

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"created", "enabled", "expires",

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"fingerprint", "host", "interval",

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"last_approval_request", "last_checked_ok",

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

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

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"extended_timeout": "15m",

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def approval_delay_milliseconds(self):

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

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

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

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

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datetime.datetime.utcnow())

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# attributes specific for this server instance

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self.checker = None

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self.checker_initiator_tag = None

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

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# Already enabled

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return

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self.send_changedstate()

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

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self.enabled = True

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self.last_enabled = datetime.datetime.utcnow()

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self.init_checker()

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self.send_changedstate()

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def disable(self, quiet=True):

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"""Disable this client."""

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

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return False

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if not quiet:

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self.send_changedstate()

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if not quiet:

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

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

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

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gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = None

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self.expires = None

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

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

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gobject.source_remove(self.checker_initiator_tag)

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self.checker_initiator_tag = None

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self.stop_checker()

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self.enabled = False

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if not quiet:

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self.send_changedstate()

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

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return False

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def init_checker(self):

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

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# and every interval from then on.

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if self.checker_initiator_tag is not None:

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gobject.source_remove(self.checker_initiator_tag)

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self.checker_initiator_tag = (gobject.timeout_add

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(self.interval_milliseconds(),

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self.start_checker))

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

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if self.disable_initiator_tag is not None:

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gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = (gobject.timeout_add

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(self.timeout_milliseconds(),

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self.disable))

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

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vars(self))

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def checked_ok(self, timeout=None):

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"""Bump up the timeout for this client.

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

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alive and well.

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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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self.disable_initiator_tag = None

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

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self.disable_initiator_tag = (gobject.timeout_add

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(timedelta_to_milliseconds

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If a checker already exists, leave it running and do

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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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self.current_checker_command)

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# Start a new checker if needed

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if self.checker is None:

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# Escape attributes for the shell

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escaped_attrs = dict(

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

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for attr in

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self.runtime_expansions)

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try:

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# In case checker_command has exactly one % operator

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command = self.checker_command % self.host

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except TypeError:

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# Escape attributes for the shell

683

escaped_attrs = dict(

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(attr,

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

686

errors=

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'replace')))

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for attr in

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self.runtime_expansions)

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try:

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command = self.checker_command % escaped_attrs

693

except TypeError as error:

694

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

695

' %s', self.checker_command, error)

696

return True # Try again later

700

command = self.checker_command % escaped_attrs

701

except TypeError as error:

702

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

703

self.checker_command, exc_info=error)

704

return True # Try again later

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self.current_checker_command = command

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try:

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

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713

self.checker = subprocess.Popen(command,

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close_fds=True,

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shell=True, cwd="/")

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self.checker_callback_tag = (gobject.child_watch_add

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(self.checker.pid,

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self.checker_callback,

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data=command))

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# The checker may have completed before the gobject

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# watch was added. Check for this.

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

715

if pid:

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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:

719

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

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error)

717

logger.error("Failed to start subprocess",

718

exc_info=error)

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self.checker_callback_tag = (gobject.child_watch_add

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(self.checker.pid,

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self.checker_callback,

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data=command))

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# The checker may have completed before the gobject

724

# watch was added. Check for this.

725

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

726

if pid:

727

gobject.source_remove(self.checker_callback_tag)

728

self.checker_callback(pid, status, command)

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

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return True

723

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730

738

return

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739

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

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try:

733

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

741

self.checker.terminate()

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742

#time.sleep(0.5)

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

736

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

744

# self.checker.kill()

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except OSError as error:

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746

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

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747

raise

756

764

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

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if byte_arrays and signature != "ay":

758

766

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

759

" signature %r" % signature)

767

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

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768

def decorator(func):

761

769

func._dbus_is_property = True

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func._dbus_interface = dbus_interface

770

778

return decorator

771

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781

def dbus_interface_annotations(dbus_interface):

782

"""Decorator for marking functions returning interface annotations

783

784

Usage:

785

786

@dbus_interface_annotations("org.example.Interface")

787

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

788

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

789

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

790

"false"}

791

"""

792

def decorator(func):

793

func._dbus_is_interface = True

794

func._dbus_interface = dbus_interface

795

func._dbus_name = dbus_interface

796

return func

797

return decorator

798

799

800

def dbus_annotations(annotations):

801

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

802

Usage:

803

804

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

805

access="r")

806

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

807

"org.freedesktop.DBus.Property."

808

"EmitsChangedSignal": "false"})

809

def Property_dbus_property(self):

810

return dbus.Boolean(False)

811

"""

812

def decorator(func):

813

func._dbus_annotations = annotations

814

return func

815

return decorator

816

817

773

818

class DBusPropertyException(dbus.exceptions.DBusException):

774

819

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

775

820

"""

798

843

"""

799

844

800

845

@staticmethod

801

def _is_dbus_property(obj):

802

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)

803

854

804

def _get_all_dbus_properties(self):

855

def _get_all_dbus_things(self, thing):

805

856

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

806

857

"""

807

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

858

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

859

name),

860

athing.__get__(self))

808

861

for cls in self.__class__.__mro__

809

for name, prop in

810

inspect.getmembers(cls, self._is_dbus_property))

862

for name, athing in

863

inspect.getmembers(cls,

864

self._is_dbus_thing(thing)))

811

865

812

866

def _get_dbus_property(self, interface_name, property_name):

813

867

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

815

869

"""

816

870

for cls in self.__class__.__mro__:

817

871

for name, value in (inspect.getmembers

818

(cls, self._is_dbus_property)):

872

(cls,

873

self._is_dbus_thing("property"))):

819

874

if (value._dbus_name == property_name

820

875

and value._dbus_interface == interface_name):

821

876

return value.__get__(self)

863

918

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

864

919

"""

865

920

properties = {}

866

for name, prop in self._get_all_dbus_properties():

921

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

867

922

if (interface_name

868

923

and interface_name != prop._dbus_interface):

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924

# Interface non-empty but did not match

884

939

path_keyword='object_path',

885

940

connection_keyword='connection')

886

941

def Introspect(self, object_path, connection):

887

"""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.

888

945

"""

889

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

890

947

connection)

897

954

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

898

955

return e

899

956

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

957

# Add property tags

900

958

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

901

959

for name, prop

902

in self._get_all_dbus_properties()

960

in self._get_all_dbus_things("property")

903

961

if prop._dbus_interface

904

962

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

905

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)

906

995

# Add the names to the return values for the

907

996

# "org.freedesktop.DBus.Properties" methods

908

997

if (if_tag.getAttribute("name")

923

1012

except (AttributeError, xml.dom.DOMException,

924

1013

xml.parsers.expat.ExpatError) as error:

925

1014

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

926

error)

1015

exc_info=error)

927

1016

return xmlstring

928

1017

929

1018

930

def datetime_to_dbus (dt, variant_level=0):

1019

def datetime_to_dbus(dt, variant_level=0):

931

1020

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

932

1021

if dt is None:

933

1022

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

935

1024

variant_level=variant_level)

936

1025

937

1026

938

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

939

.__metaclass__):

940

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

941

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).

942

1049

"""

943

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

944

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

945

# methods, signals, or properties in them

946

for base in (b for b in bases

947

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

948

# Go though all attributes of the base class

949

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):

950

1057

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

951

1058

# with the wrong interface name

952

1059

if (not hasattr(attribute, "_dbus_interface")

953

1060

or not attribute._dbus_interface

954

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

1061

.startswith(orig_interface_name)):

955

1062

continue

956

1063

# Create an alternate D-Bus interface name based on

957

1064

# the current name

958

1065

alt_interface = (attribute._dbus_interface

959

.replace("se.recompile.Mandos",

960

"se.bsnet.fukt.Mandos"))

1066

.replace(orig_interface_name,

1067

alt_interface_name))

1068

interface_names.add(alt_interface)

961

1069

# Is this a D-Bus signal?

962

1070

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

963

1071

# Extract the original non-method function by

978

1086

nonmethod_func.func_name,

979

1087

nonmethod_func.func_defaults,

980

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

981

1095

# Define a creator of a function to call both the

982

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

983

# 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

984

1099

def fixscope(func1, func2):

985

1100

"""This function is a scope container to pass

986

1101

func1 and func2 to the "call_both" function

993

1108

return call_both

994

1109

# Create the "call_both" function and add it to

995

1110

# the class

996

attr[attrname] = fixscope(attribute,

997

new_function)

1111

attr[attrname] = fixscope(attribute, new_function)

998

1112

# Is this a D-Bus method?

999

1113

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

1000

1114

# Create a new, but exactly alike, function

1011

1125

attribute.func_name,

1012

1126

attribute.func_defaults,

1013

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

1014

1134

# Is this a D-Bus property?

1015

1135

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

1016

1136

# Create a new, but exactly alike, function

1030

1150

attribute.func_name,

1031

1151

attribute.func_defaults,

1032

1152

attribute.func_closure)))

1033

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

1034

1035

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"})

1036

1198

class ClientDBus(Client, DBusObjectWithProperties):

1037

1199

"""A Client class using D-Bus

1038

1200

1058

1220

("/clients/" + client_object_name))

1059

1221

DBusObjectWithProperties.__init__(self, self.bus,

1060

1222

self.dbus_object_path)

1061

1223

1062

1224

def notifychangeproperty(transform_func,

1063

1225

dbus_name, type_func=lambda x: x,

1064

1226

variant_level=1):

1087

1249

1088

1250

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

1089

1251

1090

1091

1252

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1092

1253

approvals_pending = notifychangeproperty(dbus.Boolean,

1093

1254

"ApprovalPending",

1100

1261

checker is not None)

1101

1262

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1102

1263

"LastCheckedOK")

1264

last_checker_status = notifychangeproperty(dbus.Int16,

1265

"LastCheckerStatus")

1103

1266

last_approval_request = notifychangeproperty(

1104

1267

datetime_to_dbus, "LastApprovalRequest")

1105

1268

approved_by_default = notifychangeproperty(dbus.Boolean,

1173

1336

return False

1174

1337

1175

1338

def approve(self, value=True):

1176

self.send_changedstate()

1177

1339

self.approved = value

1178

1340

gobject.timeout_add(timedelta_to_milliseconds

1179

1341

(self.approval_duration),

1180

1342

self._reset_approved)

1181

1343

self.send_changedstate()

1182

1344

1183

1345

## D-Bus methods, signals & properties

1184

1346

_interface = "se.recompile.Mandos.Client"

1185

1347

1348

## Interfaces

1349

1350

@dbus_interface_annotations(_interface)

1351

def _foo(self):

1352

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

1353

"false"}

1354

1186

1355

## Signals

1187

1356

1188

1357

# CheckerCompleted - signal

1339

1508

return

1340

1509

return datetime_to_dbus(self.last_checked_ok)

1341

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

1342

1517

# Expires - property

1343

1518

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

1344

1519

def Expires_dbus_property(self):

1355

1530

def Timeout_dbus_property(self, value=None):

1356

1531

if value is None: # get

1357

1532

return dbus.UInt64(self.timeout_milliseconds())

1533

old_timeout = self.timeout

1358

1534

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

1359

# Reschedule timeout

1535

# Reschedule disabling

1360

1536

if self.enabled:

1361

1537

now = datetime.datetime.utcnow()

1362

time_to_die = timedelta_to_milliseconds(

1363

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

1364

if time_to_die <= 0:

1538

self.expires += self.timeout - old_timeout

1539

if self.expires <= now:

1365

1540

# The timeout has passed

1366

1541

self.disable()

1367

1542

else:

1368

self.expires = (now +

1369

datetime.timedelta(milliseconds =

1370

time_to_die))

1371

1543

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

1372

1544

is None):

1373

1545

return

1374

1546

gobject.source_remove(self.disable_initiator_tag)

1375

self.disable_initiator_tag = (gobject.timeout_add

1376

(time_to_die,

1377

self.disable))

1547

self.disable_initiator_tag = (

1548

gobject.timeout_add(

1549

timedelta_to_milliseconds(self.expires - now),

1550

self.disable))

1378

1551

1379

1552

# ExtendedTimeout - property

1380

1553

@dbus_service_property(_interface, signature="t",

1459

1632

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

1460

1633

1461

1634

1462

class ClientDBusTransitional(ClientDBus):

1463

__metaclass__ = AlternateDBusNamesMetaclass

1464

1465

1466

1635

class ClientHandler(socketserver.BaseRequestHandler, object):

1467

1636

"""A class to handle client connections.

1468

1637

1572

1741

#wait until timeout or approved

1573

1742

time = datetime.datetime.now()

1574

1743

client.changedstate.acquire()

1575

(client.changedstate.wait

1576

(float(client.timedelta_to_milliseconds(delay)

1577

/ 1000)))

1744

client.changedstate.wait(

1745

float(timedelta_to_milliseconds(delay)

1746

/ 1000))

1578

1747

client.changedstate.release()

1579

1748

time2 = datetime.datetime.now()

1580

1749

if (time2 - time) >= delay:

1596

1765

try:

1597

1766

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

1598

1767

except gnutls.errors.GNUTLSError as error:

1599

logger.warning("gnutls send failed")

1768

logger.warning("gnutls send failed",

1769

exc_info=error)

1600

1770

return

1601

1771

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

1602

1772

sent, len(client.secret)

1605

1775

1606

1776

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

1607

1777

# bump the timeout using extended_timeout

1608

client.checked_ok(client.extended_timeout)

1778

client.bump_timeout(client.extended_timeout)

1609

1779

if self.server.use_dbus:

1610

1780

# Emit D-Bus signal

1611

1781

client.GotSecret()

1616

1786

try:

1617

1787

session.bye()

1618

1788

except gnutls.errors.GNUTLSError as error:

1619

logger.warning("GnuTLS bye failed")

1789

logger.warning("GnuTLS bye failed",

1790

exc_info=error)

1620

1791

1621

1792

@staticmethod

1622

1793

def peer_certificate(session):

1694

1865

def process_request(self, request, address):

1695

1866

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

1696

1867

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

1697

args = (request,

1698

address))

1868

args = (request, address))

1699

1869

proc.start()

1700

1870

return proc

1701

1871

1729

1899

use_ipv6: Boolean; to use IPv6 or not

1730

1900

"""

1731

1901

def __init__(self, server_address, RequestHandlerClass,

1732

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

"""

1733

1906

self.interface = interface

1734

1907

if use_ipv6:

1735

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.

1736

1935

socketserver.TCPServer.__init__(self, server_address,

1737

1936

RequestHandlerClass)

1937

1738

1938

def server_bind(self):

1739

1939

"""This overrides the normal server_bind() function

1740

1940

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

1751

1951

str(self.interface

1752

1952

+ '\0'))

1753

1953

except socket.error as error:

1754

if error[0] == errno.EPERM:

1954

if error.errno == errno.EPERM:

1755

1955

logger.error("No permission to"

1756

1956

" bind to interface %s",

1757

1957

self.interface)

1758

elif error[0] == errno.ENOPROTOOPT:

1958

elif error.errno == errno.ENOPROTOOPT:

1759

1959

logger.error("SO_BINDTODEVICE not available;"

1760

1960

" cannot bind to interface %s",

1761

1961

self.interface)

1962

elif error.errno == errno.ENODEV:

1963

logger.error("Interface %s does not"

1964

" exist, cannot bind",

1965

self.interface)

1762

1966

else:

1763

1967

raise

1764

1968

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

1794

1998

"""

1795

1999

def __init__(self, server_address, RequestHandlerClass,

1796

2000

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

1797

gnutls_priority=None, use_dbus=True):

2001

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

1798

2002

self.enabled = False

1799

2003

self.clients = clients

1800

2004

if self.clients is None:

1804

2008

IPv6_TCPServer.__init__(self, server_address,

1805

2009

RequestHandlerClass,

1806

2010

interface = interface,

1807

use_ipv6 = use_ipv6)

2011

use_ipv6 = use_ipv6,

2012

socketfd = socketfd)

1808

2013

def server_activate(self):

1809

2014

if self.enabled:

1810

2015

return socketserver.TCPServer.server_activate(self)

1823

2028

1824

2029

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

1825

2030

proc = None, client_object=None):

1826

condition_names = {

1827

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

1828

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

1829

# blocking).

1830

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

1831

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

1832

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

1833

# broken, usually for pipes and

1834

# sockets).

1835

}

1836

conditions_string = ' | '.join(name

1837

for cond, name in

1838

condition_names.iteritems()

1839

if cond & condition)

1840

2031

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

1841

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

2032

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

1842

2033

# Wait for other process to exit

1843

2034

proc.join()

1844

2035

return False

1934

2125

elif suffix == "w":

1935

2126

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

1936

2127

else:

1937

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

2128

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

2129

.format(suffix))

1938

2130

except (ValueError, IndexError) as e:

1939

2131

raise ValueError(*(e.args))

1940

2132

timevalue += delta

1954

2146

sys.exit()

1955

2147

if not noclose:

1956

2148

# Close all standard open file descriptors

1957

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

2149

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

1958

2150

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

1959

2151

raise OSError(errno.ENODEV,

1960

"%s not a character device"

1961

% os.path.devnull)

2152

"{0} not a character device"

2153

.format(os.devnull))

1962

2154

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

1963

2155

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

1964

2156

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

1973

2165

1974

2166

parser = argparse.ArgumentParser()

1975

2167

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

1976

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

2168

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

1977

2169

help="show version number and exit")

1978

2170

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

1979

2171

help="Bind to interface IF")

2004

2196

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

2005

2197

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

2006

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")

2007

2202

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

2008

2203

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

2009

2204

2026

2221

"use_ipv6": "True",

2027

2222

"debuglevel": "",

2028

2223

"restore": "True",

2224

"socket": "",

2029

2225

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

2030

2226

}

2031

2227

2043

2239

if server_settings["port"]:

2044

2240

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

2045

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"])

2046

2251

del server_config

2047

2252

2048

2253

# Override the settings from the config file with command line

2050

2255

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

2051

2256

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

2052

2257

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

2053

"statedir"):

2258

"statedir", "socket"):

2054

2259

value = getattr(options, option)

2055

2260

if value is not None:

2056

2261

server_settings[option] = value

2082

2287

2083

2288

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

2084

2289

syslogger.setFormatter(logging.Formatter

2085

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

2086

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

2087

% server_settings["servicename"]))

2290

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

2291

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

2292

.format(server_settings

2293

["servicename"])))

2088

2294

2089

2295

# Parse config file with clients

2090

2296

client_config = configparser.SafeConfigParser(Client

2103

2309

use_ipv6=use_ipv6,

2104

2310

gnutls_priority=

2105

2311

server_settings["priority"],

2106

use_dbus=use_dbus)

2312

use_dbus=use_dbus,

2313

socketfd=(server_settings["socket"]

2314

or None))

2107

2315

if not debug:

2108

2316

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

2109

2317

try:

2110

2318

pidfile = open(pidfilename, "w")

2111

except IOError:

2112

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)

2113

2322

2114

try:

2115

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

2116

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

2117

except KeyError:

2323

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

2118

2324

try:

2119

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

2120

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

2325

uid = pwd.getpwnam(name).pw_uid

2326

gid = pwd.getpwnam(name).pw_gid

2327

break

2121

2328

except KeyError:

2122

try:

2123

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

2124

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

2125

except KeyError:

2126

uid = 65534

2127

gid = 65534

2329

continue

2330

else:

2331

uid = 65534

2332

gid = 65534

2128

2333

try:

2129

2334

os.setgid(gid)

2130

2335

os.setuid(uid)

2131

2336

except OSError as error:

2132

if error[0] != errno.EPERM:

2337

if error.errno != errno.EPERM:

2133

2338

raise error

2134

2339

2135

2340

if debug:

2147

2352

.gnutls_global_set_log_function(debug_gnutls))

2148

2353

2149

2354

# Redirect stdin so all checkers get /dev/null

2150

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

2355

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

2151

2356

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

2152

2357

if null > 2:

2153

2358

os.close(null)

2157

2362

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

2158

2363

daemon()

2159

2364

2365

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

2366

# need to inform gobject that threads will be used.

2160

2367

gobject.threads_init()

2161

2368

2162

2369

global main_loop

2163

2370

# From the Avahi example code

2164

DBusGMainLoop(set_as_default=True )

2371

DBusGMainLoop(set_as_default=True)

2165

2372

main_loop = gobject.MainLoop()

2166

2373

bus = dbus.SystemBus()

2167

2374

# End of Avahi example code

2173

2380

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

2174

2381

do_not_queue=True))

2175

2382

except dbus.exceptions.NameExistsException as e:

2176

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

2383

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

2177

2384

use_dbus = False

2178

2385

server_settings["use_dbus"] = False

2179

2386

tcp_server.use_dbus = False

2191

2398

2192

2399

client_class = Client

2193

2400

if use_dbus:

2194

client_class = functools.partial(ClientDBusTransitional,

2195

bus = bus)

2401

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

2196

2402

2197

2403

client_settings = Client.config_parser(client_config)

2198

2404

old_client_settings = {}

2206

2412

(stored_state))

2207

2413

os.remove(stored_state_path)

2208

2414

except IOError as e:

2209

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

2210

.format(e))

2211

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)

2212

2421

raise

2213

2422

except EOFError as e:

2214

2423

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

2215

"EOFError: {0}".format(e))

2424

"EOFError:", exc_info=e)

2216

2425

2217

2426

with PGPEngine() as pgp:

2218

2427

for client_name, client in clients_data.iteritems():

2271

2480

.format(client_name))

2272

2481

client["secret"] = (

2273

2482

client_settings[client_name]["secret"])

2274

2275

2483

2276

2484

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

2277

2485

for client_name in (set(old_client_settings)

2280

2488

for client_name in (set(client_settings)

2281

2489

- set(old_client_settings)):

2282

2490

clients_data[client_name] = client_settings[client_name]

2283

2491

2284

2492

# Create all client objects

2285

2493

for client_name, client in clients_data.iteritems():

2286

2494

tcp_server.clients[client_name] = client_class(

2288

2496

2289

2497

if not tcp_server.clients:

2290

2498

logger.warning("No clients defined")

2291

2499

2292

2500

if not debug:

2293

2501

try:

2294

2502

with pidfile:

2302

2510

# "pidfile" was never created

2303

2511

pass

2304

2512

del pidfilename

2305

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

2306

2513

2307

2514

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

2308

2515

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

2309

2516

2310

2517

if use_dbus:

2311

class MandosDBusService(dbus.service.Object):

2518

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

2519

"se.bsnet.fukt.Mandos"})

2520

class MandosDBusService(DBusObjectWithProperties):

2312

2521

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

2313

2522

def __init__(self):

2314

2523

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

2315

2524

_interface = "se.recompile.Mandos"

2316

2525

2526

@dbus_interface_annotations(_interface)

2527

def _foo(self):

2528

return { "org.freedesktop.DBus.Property"

2529

".EmitsChangedSignal":

2530

"false"}

2531

2317

2532

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

2318

2533

def ClientAdded(self, objpath):

2319

2534

"D-Bus signal"

2361

2576

2362

2577

del _interface

2363

2578

2364

class MandosDBusServiceTransitional(MandosDBusService):

2365

__metaclass__ = AlternateDBusNamesMetaclass

2366

mandos_dbus_service = MandosDBusServiceTransitional()

2579

mandos_dbus_service = MandosDBusService()

2367

2580

2368

2581

def cleanup():

2369

2582

"Cleanup function; run on exit"

2402

2615

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

2403

2616

2404

2617

try:

2405

tempfd, tempname = tempfile.mkstemp(suffix=".pickle",

2406

prefix="clients-",

2407

dir=os.path.dirname

2408

(stored_state_path))

2409

with os.fdopen(tempfd, "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:

2410

2622

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

2623

tempname=stored_state.name

2411

2624

os.rename(tempname, stored_state_path)

2412

2625

except (IOError, OSError) as e:

2413

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

2414

.format(e))

2415

2626

if not debug:

2416

2627

try:

2417

2628

os.remove(tempname)

2418

2629

except NameError:

2419

2630

pass

2420

if e.errno not in set((errno.ENOENT, errno.EACCES,

2421

errno.EEXIST)):

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)

2422

2637

raise e

2423

2638

2424

2639

# Delete all clients, and settings from config

2452

2667

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

2453

2668

if use_ipv6:

2454

2669

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

2455

" flowinfo %d, scope_id %d"

2456

% tcp_server.socket.getsockname())

2670

" flowinfo %d, scope_id %d",

2671

*tcp_server.socket.getsockname())

2457

2672

else: # IPv4

2458

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

2459

% tcp_server.socket.getsockname())

2673

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

2674

*tcp_server.socket.getsockname())

2460

2675

2461

2676

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

2462

2677

2465

2680

try:

2466

2681

service.activate()

2467

2682

except dbus.exceptions.DBusException as error:

2468

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

2683

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

2469

2684

cleanup()

2470

2685

sys.exit(1)

2471

2686

# End of Avahi example code

2478

2693

logger.debug("Starting main loop")

2479

2694

main_loop.run()

2480

2695

except AvahiError as error:

2481

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

2696

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

2482

2697

cleanup()

2483

2698

sys.exit(1)

2484

2699

except KeyboardInterrupt: