/mandos/release : revision 302

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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 = "1.5.3"

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version = "1.6.0"

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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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"""

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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["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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timeout = self.timeout

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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

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escaped_attrs = dict(

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(attr,

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

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errors=

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'replace')))

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for attr in

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self.runtime_expansions)

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try:

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command = self.checker_command % escaped_attrs

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except TypeError as error:

695

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

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' %s', self.checker_command, error)

697

return True # Try again later

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command = self.checker_command % escaped_attrs

701

except TypeError as error:

702

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

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self.checker_command, exc_info=error)

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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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)

716

if pid:

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gobject.source_remove(self.checker_callback_tag)

718

self.checker_callback(pid, status, command)

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except OSError as error:

720

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

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error)

717

logger.error("Failed to start subprocess",

718

exc_info=error)

719

self.checker_callback_tag = (gobject.child_watch_add

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(self.checker.pid,

721

self.checker_callback,

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data=command))

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# The checker may have completed before the gobject

724

# watch was added. Check for this.

725

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

726

if pid:

727

gobject.source_remove(self.checker_callback_tag)

728

self.checker_callback(pid, status, command)

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

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return True

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738

return

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

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try:

734

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:

737

# 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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raise

757

764

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

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765

if byte_arrays and signature != "ay":

759

766

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

760

" signature %r" % signature)

767

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

761

768

def decorator(func):

762

769

func._dbus_is_property = True

763

770

func._dbus_interface = dbus_interface

771

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return decorator

772

779

773

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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

774

818

class DBusPropertyException(dbus.exceptions.DBusException):

775

819

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

776

820

"""

799

843

"""

800

844

801

845

@staticmethod

802

def _is_dbus_property(obj):

803

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)

804

854

805

def _get_all_dbus_properties(self):

855

def _get_all_dbus_things(self, thing):

806

856

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

807

857

"""

808

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

858

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

859

name),

860

athing.__get__(self))

809

861

for cls in self.__class__.__mro__

810

for name, prop in

811

inspect.getmembers(cls, self._is_dbus_property))

862

for name, athing in

863

inspect.getmembers(cls,

864

self._is_dbus_thing(thing)))

812

865

813

866

def _get_dbus_property(self, interface_name, property_name):

814

867

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

816

869

"""

817

870

for cls in self.__class__.__mro__:

818

871

for name, value in (inspect.getmembers

819

(cls, self._is_dbus_property)):

872

(cls,

873

self._is_dbus_thing("property"))):

820

874

if (value._dbus_name == property_name

821

875

and value._dbus_interface == interface_name):

822

876

return value.__get__(self)

864

918

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

865

919

"""

866

920

properties = {}

867

for name, prop in self._get_all_dbus_properties():

921

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

868

922

if (interface_name

869

923

and interface_name != prop._dbus_interface):

870

924

# Interface non-empty but did not match

885

939

path_keyword='object_path',

886

940

connection_keyword='connection')

887

941

def Introspect(self, object_path, connection):

888

"""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.

889

945

"""

890

946

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

891

947

connection)

898

954

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

899

955

return e

900

956

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

957

# Add property tags

901

958

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

902

959

for name, prop

903

in self._get_all_dbus_properties()

960

in self._get_all_dbus_things("property")

904

961

if prop._dbus_interface

905

962

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

906

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)

907

995

# Add the names to the return values for the

908

996

# "org.freedesktop.DBus.Properties" methods

909

997

if (if_tag.getAttribute("name")

924

1012

except (AttributeError, xml.dom.DOMException,

925

1013

xml.parsers.expat.ExpatError) as error:

926

1014

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

927

error)

1015

exc_info=error)

928

1016

return xmlstring

929

1017

930

1018

931

def datetime_to_dbus (dt, variant_level=0):

1019

def datetime_to_dbus(dt, variant_level=0):

932

1020

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

933

1021

if dt is None:

934

1022

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

936

1024

variant_level=variant_level)

937

1025

938

1026

939

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

940

.__metaclass__):

941

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

942

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).

943

1049

"""

944

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

945

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

946

# methods, signals, or properties in them

947

for base in (b for b in bases

948

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

949

# Go though all attributes of the base class

950

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):

951

1057

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

952

1058

# with the wrong interface name

953

1059

if (not hasattr(attribute, "_dbus_interface")

954

1060

or not attribute._dbus_interface

955

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

1061

.startswith(orig_interface_name)):

956

1062

continue

957

1063

# Create an alternate D-Bus interface name based on

958

1064

# the current name

959

1065

alt_interface = (attribute._dbus_interface

960

.replace("se.recompile.Mandos",

961

"se.bsnet.fukt.Mandos"))

1066

.replace(orig_interface_name,

1067

alt_interface_name))

1068

interface_names.add(alt_interface)

962

1069

# Is this a D-Bus signal?

963

1070

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

964

1071

# Extract the original non-method function by

979

1086

nonmethod_func.func_name,

980

1087

nonmethod_func.func_defaults,

981

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

982

1095

# Define a creator of a function to call both the

983

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

984

# 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

985

1099

def fixscope(func1, func2):

986

1100

"""This function is a scope container to pass

987

1101

func1 and func2 to the "call_both" function

994

1108

return call_both

995

1109

# Create the "call_both" function and add it to

996

1110

# the class

997

attr[attrname] = fixscope(attribute,

998

new_function)

1111

attr[attrname] = fixscope(attribute, new_function)

999

1112

# Is this a D-Bus method?

1000

1113

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

1001

1114

# Create a new, but exactly alike, function

1012

1125

attribute.func_name,

1013

1126

attribute.func_defaults,

1014

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

1015

1134

# Is this a D-Bus property?

1016

1135

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

1017

1136

# Create a new, but exactly alike, function

1031

1150

attribute.func_name,

1032

1151

attribute.func_defaults,

1033

1152

attribute.func_closure)))

1034

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

1035

1036

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"})

1037

1198

class ClientDBus(Client, DBusObjectWithProperties):

1038

1199

"""A Client class using D-Bus

1039

1200

1059

1220

("/clients/" + client_object_name))

1060

1221

DBusObjectWithProperties.__init__(self, self.bus,

1061

1222

self.dbus_object_path)

1062

1223

1063

1224

def notifychangeproperty(transform_func,

1064

1225

dbus_name, type_func=lambda x: x,

1065

1226

variant_level=1):

1088

1249

1089

1250

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

1090

1251

1091

1092

1252

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1093

1253

approvals_pending = notifychangeproperty(dbus.Boolean,

1094

1254

"ApprovalPending",

1176

1336

return False

1177

1337

1178

1338

def approve(self, value=True):

1179

self.send_changedstate()

1180

1339

self.approved = value

1181

1340

gobject.timeout_add(timedelta_to_milliseconds

1182

1341

(self.approval_duration),

1183

1342

self._reset_approved)

1184

1343

self.send_changedstate()

1185

1344

1186

1345

## D-Bus methods, signals & properties

1187

1346

_interface = "se.recompile.Mandos.Client"

1188

1347

1348

## Interfaces

1349

1350

@dbus_interface_annotations(_interface)

1351

def _foo(self):

1352

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

1353

"false"}

1354

1189

1355

## Signals

1190

1356

1191

1357

# CheckerCompleted - signal

1364

1530

def Timeout_dbus_property(self, value=None):

1365

1531

if value is None: # get

1366

1532

return dbus.UInt64(self.timeout_milliseconds())

1533

old_timeout = self.timeout

1367

1534

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

1368

# Reschedule timeout

1535

# Reschedule disabling

1369

1536

if self.enabled:

1370

1537

now = datetime.datetime.utcnow()

1371

time_to_die = timedelta_to_milliseconds(

1372

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

1373

if time_to_die <= 0:

1538

self.expires += self.timeout - old_timeout

1539

if self.expires <= now:

1374

1540

# The timeout has passed

1375

1541

self.disable()

1376

1542

else:

1377

self.expires = (now +

1378

datetime.timedelta(milliseconds =

1379

time_to_die))

1380

1543

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

1381

1544

is None):

1382

1545

return

1383

1546

gobject.source_remove(self.disable_initiator_tag)

1384

self.disable_initiator_tag = (gobject.timeout_add

1385

(time_to_die,

1386

self.disable))

1547

self.disable_initiator_tag = (

1548

gobject.timeout_add(

1549

timedelta_to_milliseconds(self.expires - now),

1550

self.disable))

1387

1551

1388

1552

# ExtendedTimeout - property

1389

1553

@dbus_service_property(_interface, signature="t",

1468

1632

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

1469

1633

1470

1634

1471

class ClientDBusTransitional(ClientDBus):

1472

__metaclass__ = AlternateDBusNamesMetaclass

1473

1474

1475

1635

class ClientHandler(socketserver.BaseRequestHandler, object):

1476

1636

"""A class to handle client connections.

1477

1637

1581

1741

#wait until timeout or approved

1582

1742

time = datetime.datetime.now()

1583

1743

client.changedstate.acquire()

1584

(client.changedstate.wait

1585

(float(client.timedelta_to_milliseconds(delay)

1586

/ 1000)))

1744

client.changedstate.wait(

1745

float(timedelta_to_milliseconds(delay)

1746

/ 1000))

1587

1747

client.changedstate.release()

1588

1748

time2 = datetime.datetime.now()

1589

1749

if (time2 - time) >= delay:

1605

1765

try:

1606

1766

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

1607

1767

except gnutls.errors.GNUTLSError as error:

1608

logger.warning("gnutls send failed")

1768

logger.warning("gnutls send failed",

1769

exc_info=error)

1609

1770

return

1610

1771

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

1611

1772

sent, len(client.secret)

1625

1786

try:

1626

1787

session.bye()

1627

1788

except gnutls.errors.GNUTLSError as error:

1628

logger.warning("GnuTLS bye failed")

1789

logger.warning("GnuTLS bye failed",

1790

exc_info=error)

1629

1791

1630

1792

@staticmethod

1631

1793

def peer_certificate(session):

1703

1865

def process_request(self, request, address):

1704

1866

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

1705

1867

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

1706

args = (request,

1707

address))

1868

args = (request, address))

1708

1869

proc.start()

1709

1870

return proc

1710

1871

1738

1899

use_ipv6: Boolean; to use IPv6 or not

1739

1900

"""

1740

1901

def __init__(self, server_address, RequestHandlerClass,

1741

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

"""

1742

1906

self.interface = interface

1743

1907

if use_ipv6:

1744

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.

1745

1935

socketserver.TCPServer.__init__(self, server_address,

1746

1936

RequestHandlerClass)

1937

1747

1938

def server_bind(self):

1748

1939

"""This overrides the normal server_bind() function

1749

1940

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

1757

1948

try:

1758

1949

self.socket.setsockopt(socket.SOL_SOCKET,

1759

1950

SO_BINDTODEVICE,

1760

str(self.interface

1761

+ '\0'))

1951

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

1762

1952

except socket.error as error:

1763

if error[0] == errno.EPERM:

1764

logger.error("No permission to"

1765

" bind to interface %s",

1766

self.interface)

1767

elif error[0] == errno.ENOPROTOOPT:

1953

if error.errno == errno.EPERM:

1954

logger.error("No permission to bind to"

1955

" interface %s", self.interface)

1956

elif error.errno == errno.ENOPROTOOPT:

1768

1957

logger.error("SO_BINDTODEVICE not available;"

1769

1958

" cannot bind to interface %s",

1770

1959

self.interface)

1960

elif error.errno == errno.ENODEV:

1961

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

1962

" cannot bind", self.interface)

1771

1963

else:

1772

1964

raise

1773

1965

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

1803

1995

"""

1804

1996

def __init__(self, server_address, RequestHandlerClass,

1805

1997

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

1806

gnutls_priority=None, use_dbus=True):

1998

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

1807

1999

self.enabled = False

1808

2000

self.clients = clients

1809

2001

if self.clients is None:

1813

2005

IPv6_TCPServer.__init__(self, server_address,

1814

2006

RequestHandlerClass,

1815

2007

interface = interface,

1816

use_ipv6 = use_ipv6)

2008

use_ipv6 = use_ipv6,

2009

socketfd = socketfd)

1817

2010

def server_activate(self):

1818

2011

if self.enabled:

1819

2012

return socketserver.TCPServer.server_activate(self)

1832

2025

1833

2026

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

1834

2027

proc = None, client_object=None):

1835

condition_names = {

1836

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

1837

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

1838

# blocking).

1839

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

1840

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

1841

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

1842

# broken, usually for pipes and

1843

# sockets).

1844

}

1845

conditions_string = ' | '.join(name

1846

for cond, name in

1847

condition_names.iteritems()

1848

if cond & condition)

1849

2028

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

1850

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

2029

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

1851

2030

# Wait for other process to exit

1852

2031

proc.join()

1853

2032

return False

1943

2122

elif suffix == "w":

1944

2123

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

1945

2124

else:

1946

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

2125

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

2126

.format(suffix))

1947

2127

except (ValueError, IndexError) as e:

1948

2128

raise ValueError(*(e.args))

1949

2129

timevalue += delta

1963

2143

sys.exit()

1964

2144

if not noclose:

1965

2145

# Close all standard open file descriptors

1966

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

2146

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

1967

2147

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

1968

2148

raise OSError(errno.ENODEV,

1969

"%s not a character device"

1970

% os.path.devnull)

2149

"{0} not a character device"

2150

.format(os.devnull))

1971

2151

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

1972

2152

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

1973

2153

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

1982

2162

1983

2163

parser = argparse.ArgumentParser()

1984

2164

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

1985

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

2165

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

1986

2166

help="show version number and exit")

1987

2167

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

1988

2168

help="Bind to interface IF")

2013

2193

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

2014

2194

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

2015

2195

" state")

2196

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

2197

help="Specify a file descriptor to a network"

2198

" socket to use instead of creating one")

2016

2199

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

2017

2200

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

2201

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

2202

help="Run in foreground")

2018

2203

2019

2204

options = parser.parse_args()

2020

2205

2035

2220

"use_ipv6": "True",

2036

2221

"debuglevel": "",

2037

2222

"restore": "True",

2038

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

2223

"socket": "",

2224

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

2225

"foreground": "False",

2039

2226

}

2040

2227

2041

2228

# Parse config file for server-global settings

2046

2233

# Convert the SafeConfigParser object to a dict

2047

2234

server_settings = server_config.defaults()

2048

2235

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

2049

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

2236

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

2050

2237

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

2051

2238

option)

2052

2239

if server_settings["port"]:

2053

2240

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

2054

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"])

2055

2251

del server_config

2056

2252

2057

2253

# Override the settings from the config file with command line

2059

2255

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

2060

2256

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

2061

2257

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

2062

"statedir"):

2258

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

2063

2259

value = getattr(options, option)

2064

2260

if value is not None:

2065

2261

server_settings[option] = value

2068

2264

for option in server_settings.keys():

2069

2265

if type(server_settings[option]) is str:

2070

2266

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

2267

# Debug implies foreground

2268

if server_settings["debug"]:

2269

server_settings["foreground"] = True

2071

2270

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

2072

2271

2073

2272

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

2079

2278

use_ipv6 = server_settings["use_ipv6"]

2080

2279

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

2081

2280

stored_state_file)

2281

foreground = server_settings["foreground"]

2082

2282

2083

2283

if debug:

2084

2284

initlogger(debug, logging.DEBUG)

2091

2291

2092

2292

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

2093

2293

syslogger.setFormatter(logging.Formatter

2094

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

2095

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

2096

% server_settings["servicename"]))

2294

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

2295

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

2296

.format(server_settings

2297

["servicename"])))

2097

2298

2098

2299

# Parse config file with clients

2099

2300

client_config = configparser.SafeConfigParser(Client

2112

2313

use_ipv6=use_ipv6,

2113

2314

gnutls_priority=

2114

2315

server_settings["priority"],

2115

use_dbus=use_dbus)

2116

if not debug:

2316

use_dbus=use_dbus,

2317

socketfd=(server_settings["socket"]

2318

or None))

2319

if not foreground:

2117

2320

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

2321

pidfile = None

2118

2322

try:

2119

2323

pidfile = open(pidfilename, "w")

2120

except IOError:

2121

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

2324

except IOError as e:

2325

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

2326

exc_info=e)

2122

2327

2123

try:

2124

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

2125

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

2126

except KeyError:

2328

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

2127

2329

try:

2128

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

2129

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

2330

uid = pwd.getpwnam(name).pw_uid

2331

gid = pwd.getpwnam(name).pw_gid

2332

break

2130

2333

except KeyError:

2131

try:

2132

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

2133

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

2134

except KeyError:

2135

uid = 65534

2136

gid = 65534

2334

continue

2335

else:

2336

uid = 65534

2337

gid = 65534

2137

2338

try:

2138

2339

os.setgid(gid)

2139

2340

os.setuid(uid)

2140

2341

except OSError as error:

2141

if error[0] != errno.EPERM:

2342

if error.errno != errno.EPERM:

2142

2343

raise error

2143

2344

2144

2345

if debug:

2156

2357

.gnutls_global_set_log_function(debug_gnutls))

2157

2358

2158

2359

# Redirect stdin so all checkers get /dev/null

2159

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

2360

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

2160

2361

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

2161

2362

if null > 2:

2162

2363

os.close(null)

2163

2364

2164

2365

# Need to fork before connecting to D-Bus

2165

if not debug:

2366

if not foreground:

2166

2367

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

2167

2368

daemon()

2168

2369

2370

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

2371

# need to inform gobject that threads will be used.

2169

2372

gobject.threads_init()

2170

2373

2171

2374

global main_loop

2172

2375

# From the Avahi example code

2173

DBusGMainLoop(set_as_default=True )

2376

DBusGMainLoop(set_as_default=True)

2174

2377

main_loop = gobject.MainLoop()

2175

2378

bus = dbus.SystemBus()

2176

2379

# End of Avahi example code

2182

2385

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

2183

2386

do_not_queue=True))

2184

2387

except dbus.exceptions.NameExistsException as e:

2185

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

2388

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

2186

2389

use_dbus = False

2187

2390

server_settings["use_dbus"] = False

2188

2391

tcp_server.use_dbus = False

2200

2403

2201

2404

client_class = Client

2202

2405

if use_dbus:

2203

client_class = functools.partial(ClientDBusTransitional,

2204

bus = bus)

2406

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

2205

2407

2206

2408

client_settings = Client.config_parser(client_config)

2207

2409

old_client_settings = {}

2215

2417

(stored_state))

2216

2418

os.remove(stored_state_path)

2217

2419

except IOError as e:

2218

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

2219

.format(e))

2220

if e.errno != errno.ENOENT:

2420

if e.errno == errno.ENOENT:

2421

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

2422

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

2423

else:

2424

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

2425

exc_info=e)

2221

2426

raise

2222

2427

except EOFError as e:

2223

2428

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

2224

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

2429

"EOFError:", exc_info=e)

2225

2430

2226

2431

with PGPEngine() as pgp:

2227

2432

for client_name, client in clients_data.iteritems():

2280

2485

.format(client_name))

2281

2486

client["secret"] = (

2282

2487

client_settings[client_name]["secret"])

2283

2284

2488

2285

2489

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

2286

2490

for client_name in (set(old_client_settings)

2289

2493

for client_name in (set(client_settings)

2290

2494

- set(old_client_settings)):

2291

2495

clients_data[client_name] = client_settings[client_name]

2292

2496

2293

2497

# Create all client objects

2294

2498

for client_name, client in clients_data.iteritems():

2295

2499

tcp_server.clients[client_name] = client_class(

2297

2501

2298

2502

if not tcp_server.clients:

2299

2503

logger.warning("No clients defined")

2300

2301

if not debug:

2302

try:

2303

with pidfile:

2304

pid = os.getpid()

2305

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

2306

del pidfile

2307

except IOError:

2308

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

2309

pidfilename, pid)

2310

except NameError:

2311

# "pidfile" was never created

2312

pass

2504

2505

if not foreground:

2506

if pidfile is not None:

2507

try:

2508

with pidfile:

2509

pid = os.getpid()

2510

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

2511

except IOError:

2512

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

2513

pidfilename, pid)

2514

del pidfile

2313

2515

del pidfilename

2314

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

2315

2516

2316

2517

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

2317

2518

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

2318

2519

2319

2520

if use_dbus:

2320

class MandosDBusService(dbus.service.Object):

2521

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

2522

"se.bsnet.fukt.Mandos"})

2523

class MandosDBusService(DBusObjectWithProperties):

2321

2524

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

2322

2525

def __init__(self):

2323

2526

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

2324

2527

_interface = "se.recompile.Mandos"

2325

2528

2529

@dbus_interface_annotations(_interface)

2530

def _foo(self):

2531

return { "org.freedesktop.DBus.Property"

2532

".EmitsChangedSignal":

2533

"false"}

2534

2326

2535

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

2327

2536

def ClientAdded(self, objpath):

2328

2537

"D-Bus signal"

2370

2579

2371

2580

del _interface

2372

2581

2373

class MandosDBusServiceTransitional(MandosDBusService):

2374

__metaclass__ = AlternateDBusNamesMetaclass

2375

mandos_dbus_service = MandosDBusServiceTransitional()

2582

mandos_dbus_service = MandosDBusService()

2376

2583

2377

2584

def cleanup():

2378

2585

"Cleanup function; run on exit"

2411

2618

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

2412

2619

2413

2620

try:

2414

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

2415

prefix="clients-",

2416

dir=os.path.dirname

2417

(stored_state_path))

2418

with os.fdopen(tempfd, "wb") as stored_state:

2621

with (tempfile.NamedTemporaryFile

2622

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

2623

dir=os.path.dirname(stored_state_path),

2624

delete=False)) as stored_state:

2419

2625

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

2626

tempname=stored_state.name

2420

2627

os.rename(tempname, stored_state_path)

2421

2628

except (IOError, OSError) as e:

2422

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

2423

.format(e))

2424

2629

if not debug:

2425

2630

try:

2426

2631

os.remove(tempname)

2427

2632

except NameError:

2428

2633

pass

2429

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

2430

errno.EEXIST)):

2634

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

2635

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

2636

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

2637

else:

2638

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

2639

exc_info=e)

2431

2640

raise e

2432

2641

2433

2642

# Delete all clients, and settings from config

2461

2670

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

2462

2671

if use_ipv6:

2463

2672

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

2464

" flowinfo %d, scope_id %d"

2465

% tcp_server.socket.getsockname())

2673

" flowinfo %d, scope_id %d",

2674

*tcp_server.socket.getsockname())

2466

2675

else: # IPv4

2467

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

2468

% tcp_server.socket.getsockname())

2676

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

2677

*tcp_server.socket.getsockname())

2469

2678

2470

2679

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

2471

2680

2474

2683

try:

2475

2684

service.activate()

2476

2685

except dbus.exceptions.DBusException as error:

2477

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

2686

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

2478

2687

cleanup()

2479

2688

sys.exit(1)

2480

2689

# End of Avahi example code

2487

2696

logger.debug("Starting main loop")

2488

2697

main_loop.run()

2489

2698

except AvahiError as error:

2490

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

2699

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

2491

2700

cleanup()

2492

2701

sys.exit(1)

2493

2702

except KeyboardInterrupt: