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# -*- mode: python; coding: utf-8 -*-
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# Mandos server - give out binary blobs to connecting clients.
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# This program is partly derived from an example program for an Avahi
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# service publisher, downloaded from
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# <http://avahi.org/wiki/PythonPublishExample>. This includes the
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# methods "add", "remove", "server_state_changed",
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# "entry_group_state_changed", "cleanup", and "activate" in the
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# "AvahiService" class, and some lines in "main".
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# Copyright © 2008-2011 Teddy Hogeborn
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# Copyright © 2008-2011 Björn Påhlsson
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
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# Contact the authors at <mandos@fukt.bsnet.se>.
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from __future__ import (division, absolute_import, print_function,
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import SocketServer as socketserver
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from optparse import OptionParser
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import gnutls.crypto
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import gnutls.connection
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import gnutls.errors
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import gnutls.library.functions
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import gnutls.library.constants
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import gnutls.library.types
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import ConfigParser as configparser
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import logging.handlers
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import cPickle as pickle
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import multiprocessing
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from dbus.mainloop.glib import DBusGMainLoop
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import xml.dom.minidom
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SO_BINDTODEVICE = socket.SO_BINDTODEVICE
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except AttributeError:
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from IN import SO_BINDTODEVICE
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SO_BINDTODEVICE = None
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#logger = logging.getLogger('mandos')
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logger = logging.Logger('mandos')
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syslogger = (logging.handlers.SysLogHandler
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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = str("/dev/log")))
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syslogger.setFormatter(logging.Formatter
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('Mandos [%(process)d]: %(levelname)s:'
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logger.addHandler(syslogger)
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console = logging.StreamHandler()
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console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
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logger.addHandler(console)
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class AvahiError(Exception):
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def __init__(self, value, *args, **kwargs):
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super(AvahiError, self).__init__(value, *args, **kwargs)
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def __unicode__(self):
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return unicode(repr(self.value))
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class AvahiServiceError(AvahiError):
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class AvahiGroupError(AvahiError):
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class AvahiService(object):
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"""An Avahi (Zeroconf) service.
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interface: integer; avahi.IF_UNSPEC or an interface index.
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Used to optionally bind to the specified interface.
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name: string; Example: 'Mandos'
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type: string; Example: '_mandos._tcp'.
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See <http://www.dns-sd.org/ServiceTypes.html>
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port: integer; what port to announce
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TXT: list of strings; TXT record for the service
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domain: string; Domain to publish on, default to .local if empty.
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host: string; Host to publish records for, default is localhost
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max_renames: integer; maximum number of renames
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rename_count: integer; counter so we only rename after collisions
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a sensible number of times
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group: D-Bus Entry Group
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bus: dbus.SystemBus()
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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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protocol = avahi.PROTO_UNSPEC, bus = None):
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self.interface = interface
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self.type = servicetype
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self.TXT = TXT if TXT is not None else []
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self.rename_count = 0
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self.max_renames = max_renames
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self.protocol = protocol
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self.group = None # our entry group
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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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logger.critical("No suitable Zeroconf service name found"
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" after %i retries, exiting.",
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raise AvahiServiceError("Too many renames")
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self.name = unicode(self.server.GetAlternativeServiceName(self.name))
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logger.info("Changing Zeroconf service name to %r ...",
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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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except dbus.exceptions.DBusException, error:
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logger.critical("DBusException: %s", error)
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self.rename_count += 1
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"""Derived from the Avahi example code"""
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if self.group is not None:
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"""Derived from the Avahi example code"""
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if self.group is None:
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self.group = dbus.Interface(
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self.bus.get_object(avahi.DBUS_NAME,
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self.server.EntryGroupNew()),
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avahi.DBUS_INTERFACE_ENTRY_GROUP)
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self.group.connect_to_signal('StateChanged',
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.entry_group_state_changed)
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logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
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self.name, self.type)
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self.group.AddService(
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dbus.UInt32(0), # flags
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self.name, self.type,
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self.domain, self.host,
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dbus.UInt16(self.port),
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avahi.string_array_to_txt_array(self.TXT))
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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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if state == avahi.ENTRY_GROUP_ESTABLISHED:
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logger.debug("Zeroconf service established.")
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elif state == avahi.ENTRY_GROUP_COLLISION:
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logger.info("Zeroconf service name collision.")
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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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raise AvahiGroupError("State changed: %s"
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"""Derived from the Avahi example code"""
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if self.group is not None:
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def server_state_changed(self, state):
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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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if state == avahi.SERVER_COLLISION:
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logger.error("Zeroconf server name collision")
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elif state == avahi.SERVER_RUNNING:
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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 = dbus.Interface(
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self.bus.get_object(avahi.DBUS_NAME,
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avahi.DBUS_PATH_SERVER),
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avahi.DBUS_INTERFACE_SERVER)
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self.server.connect_to_signal("StateChanged",
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self.server_state_changed)
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self.server_state_changed(self.server.GetState())
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class Client(object):
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def __init__(self, name=None, options=None, dn=None,
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password=None, passfile=None, fqdn=None,
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timeout=None, interval=-1):
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"""A representation of a client host served by this server.
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_approved: bool(); 'None' if not yet approved/disapproved
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approval_delay: datetime.timedelta(); Time to wait for approval
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approval_duration: datetime.timedelta(); Duration of one approval
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checker: subprocess.Popen(); a running checker process used
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to see if the client lives.
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'None' if no process is running.
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checker_callback_tag: a gobject event source tag, or None
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checker_command: string; External command which is run to check
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if client lives. %() expansions are done at
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runtime with vars(self) as dict, so that for
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instance %(name)s can be used in the command.
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checker_initiator_tag: a gobject event source tag, or None
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created: datetime.datetime(); (UTC) object creation
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current_checker_command: string; current running checker_command
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disable_hook: If set, called by disable() as disable_hook(self)
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disable_initiator_tag: a gobject event source tag, or None
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fingerprint: string (40 or 32 hexadecimal digits); used to
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uniquely identify the client
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host: string; available for use by the checker command
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interval: datetime.timedelta(); How often to start a new checker
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last_approval_request: datetime.datetime(); (UTC) or None
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last_checked_ok: datetime.datetime(); (UTC) or None
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last_enabled: datetime.datetime(); (UTC)
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name: string; from the config file, used in log messages and
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secret: bytestring; sent verbatim (over TLS) to client
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timeout: datetime.timedelta(); How long from last_checked_ok
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until this client is disabled
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runtime_expansions: Allowed attributes for runtime expansion.
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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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"last_enabled", "name", "timeout")
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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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def timeout_milliseconds(self):
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"Return the 'timeout' attribute in milliseconds"
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return self._timedelta_to_milliseconds(self.timeout)
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def interval_milliseconds(self):
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"Return the 'interval' attribute in milliseconds"
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return self._timedelta_to_milliseconds(self.interval)
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def approval_delay_milliseconds(self):
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return self._timedelta_to_milliseconds(self.approval_delay)
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def __init__(self, name = None, disable_hook=None, config=None):
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"""Note: the 'checker' key in 'config' sets the
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'checker_command' attribute and *not* the 'checker'
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self.password = password
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self.password = open(passfile).readall()
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print "No Password or Passfile in client config file"
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# raise RuntimeError XXX
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self.password = "gazonk"
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self.created = datetime.datetime.now()
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timeout = options.timeout
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self.timeout = timeout
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interval = options.interval
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self.interval = interval
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self.next_check = datetime.datetime.now()
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class server_metaclass(type):
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"Common behavior for the UDP and TCP server classes"
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def __new__(cls, name, bases, attrs):
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attrs["address_family"] = socket.AF_INET6
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attrs["allow_reuse_address"] = True
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def server_bind(self):
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if self.options.interface:
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if not hasattr(socket, "SO_BINDTODEVICE"):
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# From /usr/include/asm-i486/socket.h
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socket.SO_BINDTODEVICE = 25
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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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self.fingerprint = (config["fingerprint"].upper()
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logger.debug(" Fingerprint: %s", self.fingerprint)
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if "secret" in config:
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self.secret = config["secret"].decode("base64")
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elif "secfile" in config:
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with open(os.path.expanduser(os.path.expandvars
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(config["secfile"])),
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self.secret = secfile.read()
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raise TypeError("No secret or secfile for client %s"
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self.host = config.get("host", "")
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self.created = datetime.datetime.utcnow()
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self.last_approval_request = None
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self.last_enabled = None
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self.last_checked_ok = None
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self.timeout = string_to_delta(config["timeout"])
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self.interval = string_to_delta(config["interval"])
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self.disable_hook = disable_hook
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self.checker_initiator_tag = None
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self.disable_initiator_tag = None
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self.checker_callback_tag = None
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self.checker_command = config["checker"]
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self.current_checker_command = None
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self.last_connect = None
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self._approved = None
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self.approved_by_default = config.get("approved_by_default",
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self.approvals_pending = 0
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self.approval_delay = string_to_delta(
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config["approval_delay"])
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self.approval_duration = string_to_delta(
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config["approval_duration"])
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self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
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def send_changedstate(self):
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self.changedstate.acquire()
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self.changedstate.notify_all()
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self.changedstate.release()
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"""Start this client's checker and timeout hooks"""
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if getattr(self, "enabled", False):
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self.send_changedstate()
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self.last_enabled = datetime.datetime.utcnow()
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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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self.checker_initiator_tag = (gobject.timeout_add
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(self.interval_milliseconds(),
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# Schedule a disable() when 'timeout' has passed
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self.disable_initiator_tag = (gobject.timeout_add
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(self.timeout_milliseconds(),
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# Also start a new checker *right now*.
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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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self.send_changedstate()
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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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gobject.source_remove(self.disable_initiator_tag)
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self.disable_initiator_tag = None
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if getattr(self, "checker_initiator_tag", False):
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gobject.source_remove(self.checker_initiator_tag)
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self.checker_initiator_tag = None
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if self.disable_hook:
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self.disable_hook(self)
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# Do not run this again if called by a gobject.timeout_add
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self.disable_hook = None
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def checker_callback(self, pid, condition, command):
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"""The checker has completed, so take appropriate actions."""
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self.checker_callback_tag = None
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if os.WIFEXITED(condition):
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exitstatus = os.WEXITSTATUS(condition)
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logger.info("Checker for %(name)s succeeded",
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logger.info("Checker for %(name)s failed",
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logger.warning("Checker for %(name)s crashed?",
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def checked_ok(self):
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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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self.last_checked_ok = datetime.datetime.utcnow()
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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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def need_approval(self):
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self.last_approval_request = datetime.datetime.utcnow()
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def start_checker(self):
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"""Start a new checker subprocess if one is not running.
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If a checker already exists, leave it running and do
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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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# 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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# If a checker exists, make sure it is not a zombie
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pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
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except (AttributeError, OSError), error:
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if (isinstance(error, OSError)
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and error.errno != errno.ECHILD):
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logger.warning("Checker was a zombie")
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gobject.source_remove(self.checker_callback_tag)
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self.checker_callback(pid, status,
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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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# In case checker_command has exactly one % operator
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command = self.checker_command % self.host
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# Escape attributes for the shell
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escaped_attrs = dict(
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re.escape(unicode(str(getattr(self, attr, "")),
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self.runtime_expansions)
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command = self.checker_command % escaped_attrs
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except TypeError, error:
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logger.error('Could not format string "%s":'
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' %s', self.checker_command, error)
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return True # Try again later
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self.current_checker_command = command
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logger.info("Starting checker %r for %s",
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# We don't need to redirect stdout and stderr, since
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# in normal mode, that is already done by daemon(),
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# and in debug mode we don't want to. (Stdin is
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# always replaced by /dev/null.)
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self.checker = subprocess.Popen(command,
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self.checker_callback_tag = (gobject.child_watch_add
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self.checker_callback,
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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)
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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, error:
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logger.error("Failed to start subprocess: %s",
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# Re-run this periodically if run by gobject.timeout_add
506
def stop_checker(self):
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"""Force the checker process, if any, to stop."""
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if self.checker_callback_tag:
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gobject.source_remove(self.checker_callback_tag)
510
self.checker_callback_tag = None
511
if getattr(self, "checker", None) is None:
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logger.debug("Stopping checker for %(name)s", vars(self))
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os.kill(self.checker.pid, signal.SIGTERM)
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#if self.checker.poll() is None:
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# os.kill(self.checker.pid, signal.SIGKILL)
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except OSError, error:
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if error.errno != errno.ESRCH: # No such process
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def dbus_service_property(dbus_interface, signature="v",
525
access="readwrite", byte_arrays=False):
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"""Decorators for marking methods of a DBusObjectWithProperties to
527
become properties on the D-Bus.
529
The decorated method will be called with no arguments by "Get"
530
and with one argument by "Set".
532
The parameters, where they are supported, are the same as
533
dbus.service.method, except there is only "signature", since the
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type from Get() and the type sent to Set() is the same.
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# Encoding deeply encoded byte arrays is not supported yet by the
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# "Set" method, so we fail early here:
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if byte_arrays and signature != "ay":
539
raise ValueError("Byte arrays not supported for non-'ay'"
540
" signature %r" % signature)
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func._dbus_is_property = True
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func._dbus_interface = dbus_interface
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func._dbus_signature = signature
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func._dbus_access = access
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func._dbus_name = func.__name__
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if func._dbus_name.endswith("_dbus_property"):
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func._dbus_name = func._dbus_name[:-14]
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func._dbus_get_args_options = {'byte_arrays': byte_arrays }
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class DBusPropertyException(dbus.exceptions.DBusException):
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"""A base class for D-Bus property-related exceptions
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def __unicode__(self):
558
return unicode(str(self))
561
class DBusPropertyAccessException(DBusPropertyException):
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"""A property's access permissions disallows an operation.
567
class DBusPropertyNotFound(DBusPropertyException):
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"""An attempt was made to access a non-existing property.
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class DBusObjectWithProperties(dbus.service.Object):
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"""A D-Bus object with properties.
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Classes inheriting from this can use the dbus_service_property
577
decorator to expose methods as D-Bus properties. It exposes the
578
standard Get(), Set(), and GetAll() methods on the D-Bus.
582
def _is_dbus_property(obj):
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return getattr(obj, "_dbus_is_property", False)
585
def _get_all_dbus_properties(self):
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"""Returns a generator of (name, attribute) pairs
588
return ((prop._dbus_name, prop)
590
inspect.getmembers(self, self._is_dbus_property))
592
def _get_dbus_property(self, interface_name, property_name):
593
"""Returns a bound method if one exists which is a D-Bus
594
property with the specified name and interface.
596
for name in (property_name,
597
property_name + "_dbus_property"):
598
prop = getattr(self, name, None)
600
or not self._is_dbus_property(prop)
601
or prop._dbus_name != property_name
602
or (interface_name and prop._dbus_interface
603
and interface_name != prop._dbus_interface)):
607
raise DBusPropertyNotFound(self.dbus_object_path + ":"
608
+ interface_name + "."
611
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
613
def Get(self, interface_name, property_name):
614
"""Standard D-Bus property Get() method, see D-Bus standard.
616
prop = self._get_dbus_property(interface_name, property_name)
617
if prop._dbus_access == "write":
618
raise DBusPropertyAccessException(property_name)
620
if not hasattr(value, "variant_level"):
622
return type(value)(value, variant_level=value.variant_level+1)
624
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
625
def Set(self, interface_name, property_name, value):
626
"""Standard D-Bus property Set() method, see D-Bus standard.
628
prop = self._get_dbus_property(interface_name, property_name)
629
if prop._dbus_access == "read":
630
raise DBusPropertyAccessException(property_name)
631
if prop._dbus_get_args_options["byte_arrays"]:
632
# The byte_arrays option is not supported yet on
633
# signatures other than "ay".
634
if prop._dbus_signature != "ay":
636
value = dbus.ByteArray(''.join(unichr(byte)
640
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
641
out_signature="a{sv}")
642
def GetAll(self, interface_name):
643
"""Standard D-Bus property GetAll() method, see D-Bus
646
Note: Will not include properties with access="write".
649
for name, prop in self._get_all_dbus_properties():
651
and interface_name != prop._dbus_interface):
652
# Interface non-empty but did not match
654
# Ignore write-only properties
655
if prop._dbus_access == "write":
658
if not hasattr(value, "variant_level"):
661
all[name] = type(value)(value, variant_level=
662
value.variant_level+1)
663
return dbus.Dictionary(all, signature="sv")
665
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
667
path_keyword='object_path',
668
connection_keyword='connection')
669
def Introspect(self, object_path, connection):
670
"""Standard D-Bus method, overloaded to insert property tags.
672
xmlstring = dbus.service.Object.Introspect(self, object_path,
675
document = xml.dom.minidom.parseString(xmlstring)
676
def make_tag(document, name, prop):
677
e = document.createElement("property")
678
e.setAttribute("name", name)
679
e.setAttribute("type", prop._dbus_signature)
680
e.setAttribute("access", prop._dbus_access)
682
for if_tag in document.getElementsByTagName("interface"):
683
for tag in (make_tag(document, name, prop)
685
in self._get_all_dbus_properties()
686
if prop._dbus_interface
687
== if_tag.getAttribute("name")):
688
if_tag.appendChild(tag)
689
# Add the names to the return values for the
690
# "org.freedesktop.DBus.Properties" methods
691
if (if_tag.getAttribute("name")
692
== "org.freedesktop.DBus.Properties"):
693
for cn in if_tag.getElementsByTagName("method"):
694
if cn.getAttribute("name") == "Get":
695
for arg in cn.getElementsByTagName("arg"):
696
if (arg.getAttribute("direction")
698
arg.setAttribute("name", "value")
699
elif cn.getAttribute("name") == "GetAll":
700
for arg in cn.getElementsByTagName("arg"):
701
if (arg.getAttribute("direction")
703
arg.setAttribute("name", "props")
704
xmlstring = document.toxml("utf-8")
706
except (AttributeError, xml.dom.DOMException,
707
xml.parsers.expat.ExpatError), error:
708
logger.error("Failed to override Introspection method",
713
class ClientDBus(Client, DBusObjectWithProperties):
714
"""A Client class using D-Bus
717
dbus_object_path: dbus.ObjectPath
718
bus: dbus.SystemBus()
721
runtime_expansions = (Client.runtime_expansions
722
+ ("dbus_object_path",))
724
# dbus.service.Object doesn't use super(), so we can't either.
726
def __init__(self, bus = None, *args, **kwargs):
727
self._approvals_pending = 0
729
Client.__init__(self, *args, **kwargs)
730
# Only now, when this client is initialized, can it show up on
732
client_object_name = unicode(self.name).translate(
735
self.dbus_object_path = (dbus.ObjectPath
736
("/clients/" + client_object_name))
737
DBusObjectWithProperties.__init__(self, self.bus,
738
self.dbus_object_path)
740
def _get_approvals_pending(self):
741
return self._approvals_pending
742
def _set_approvals_pending(self, value):
743
old_value = self._approvals_pending
744
self._approvals_pending = value
746
if (hasattr(self, "dbus_object_path")
747
and bval is not bool(old_value)):
748
dbus_bool = dbus.Boolean(bval, variant_level=1)
749
self.PropertyChanged(dbus.String("ApprovalPending"),
752
approvals_pending = property(_get_approvals_pending,
753
_set_approvals_pending)
754
del _get_approvals_pending, _set_approvals_pending
757
def _datetime_to_dbus(dt, variant_level=0):
758
"""Convert a UTC datetime.datetime() to a D-Bus type."""
759
return dbus.String(dt.isoformat(),
760
variant_level=variant_level)
763
oldstate = getattr(self, "enabled", False)
764
r = Client.enable(self)
765
if oldstate != self.enabled:
767
self.PropertyChanged(dbus.String("Enabled"),
768
dbus.Boolean(True, variant_level=1))
769
self.PropertyChanged(
770
dbus.String("LastEnabled"),
771
self._datetime_to_dbus(self.last_enabled,
775
def disable(self, quiet = False):
776
oldstate = getattr(self, "enabled", False)
777
r = Client.disable(self, quiet=quiet)
778
if not quiet and oldstate != self.enabled:
780
self.PropertyChanged(dbus.String("Enabled"),
781
dbus.Boolean(False, variant_level=1))
784
def __del__(self, *args, **kwargs):
786
self.remove_from_connection()
789
if hasattr(DBusObjectWithProperties, "__del__"):
790
DBusObjectWithProperties.__del__(self, *args, **kwargs)
791
Client.__del__(self, *args, **kwargs)
793
def checker_callback(self, pid, condition, command,
795
self.checker_callback_tag = None
798
self.PropertyChanged(dbus.String("CheckerRunning"),
799
dbus.Boolean(False, variant_level=1))
800
if os.WIFEXITED(condition):
801
exitstatus = os.WEXITSTATUS(condition)
803
self.CheckerCompleted(dbus.Int16(exitstatus),
804
dbus.Int64(condition),
805
dbus.String(command))
808
self.CheckerCompleted(dbus.Int16(-1),
809
dbus.Int64(condition),
810
dbus.String(command))
812
return Client.checker_callback(self, pid, condition, command,
815
def checked_ok(self, *args, **kwargs):
816
r = Client.checked_ok(self, *args, **kwargs)
818
self.PropertyChanged(
819
dbus.String("LastCheckedOK"),
820
(self._datetime_to_dbus(self.last_checked_ok,
824
def need_approval(self, *args, **kwargs):
825
r = Client.need_approval(self, *args, **kwargs)
827
self.PropertyChanged(
828
dbus.String("LastApprovalRequest"),
829
(self._datetime_to_dbus(self.last_approval_request,
833
def start_checker(self, *args, **kwargs):
834
old_checker = self.checker
835
if self.checker is not None:
836
old_checker_pid = self.checker.pid
838
old_checker_pid = None
839
r = Client.start_checker(self, *args, **kwargs)
840
# Only if new checker process was started
841
if (self.checker is not None
842
and old_checker_pid != self.checker.pid):
844
self.CheckerStarted(self.current_checker_command)
845
self.PropertyChanged(
846
dbus.String("CheckerRunning"),
847
dbus.Boolean(True, variant_level=1))
850
def stop_checker(self, *args, **kwargs):
851
old_checker = getattr(self, "checker", None)
852
r = Client.stop_checker(self, *args, **kwargs)
853
if (old_checker is not None
854
and getattr(self, "checker", None) is None):
855
self.PropertyChanged(dbus.String("CheckerRunning"),
856
dbus.Boolean(False, variant_level=1))
859
def _reset_approved(self):
860
self._approved = None
863
def approve(self, value=True):
864
self.send_changedstate()
865
self._approved = value
866
gobject.timeout_add(self._timedelta_to_milliseconds
867
(self.approval_duration),
868
self._reset_approved)
871
## D-Bus methods, signals & properties
872
_interface = "se.bsnet.fukt.Mandos.Client"
876
# CheckerCompleted - signal
877
@dbus.service.signal(_interface, signature="nxs")
878
def CheckerCompleted(self, exitcode, waitstatus, command):
882
# CheckerStarted - signal
883
@dbus.service.signal(_interface, signature="s")
884
def CheckerStarted(self, command):
888
# PropertyChanged - signal
889
@dbus.service.signal(_interface, signature="sv")
890
def PropertyChanged(self, property, value):
895
@dbus.service.signal(_interface)
898
Is sent after a successful transfer of secret from the Mandos
899
server to mandos-client
904
@dbus.service.signal(_interface, signature="s")
905
def Rejected(self, reason):
909
# NeedApproval - signal
910
@dbus.service.signal(_interface, signature="tb")
911
def NeedApproval(self, timeout, default):
913
return self.need_approval()
918
@dbus.service.method(_interface, in_signature="b")
919
def Approve(self, value):
923
@dbus.service.method(_interface)
925
return self.checked_ok()
928
@dbus.service.method(_interface)
933
# StartChecker - method
934
@dbus.service.method(_interface)
935
def StartChecker(self):
940
@dbus.service.method(_interface)
945
# StopChecker - method
946
@dbus.service.method(_interface)
947
def StopChecker(self):
952
# ApprovalPending - property
953
@dbus_service_property(_interface, signature="b", access="read")
954
def ApprovalPending_dbus_property(self):
955
return dbus.Boolean(bool(self.approvals_pending))
957
# ApprovedByDefault - property
958
@dbus_service_property(_interface, signature="b",
960
def ApprovedByDefault_dbus_property(self, value=None):
961
if value is None: # get
962
return dbus.Boolean(self.approved_by_default)
963
self.approved_by_default = bool(value)
965
self.PropertyChanged(dbus.String("ApprovedByDefault"),
966
dbus.Boolean(value, variant_level=1))
968
# ApprovalDelay - property
969
@dbus_service_property(_interface, signature="t",
971
def ApprovalDelay_dbus_property(self, value=None):
972
if value is None: # get
973
return dbus.UInt64(self.approval_delay_milliseconds())
974
self.approval_delay = datetime.timedelta(0, 0, 0, value)
976
self.PropertyChanged(dbus.String("ApprovalDelay"),
977
dbus.UInt64(value, variant_level=1))
979
# ApprovalDuration - property
980
@dbus_service_property(_interface, signature="t",
982
def ApprovalDuration_dbus_property(self, value=None):
983
if value is None: # get
984
return dbus.UInt64(self._timedelta_to_milliseconds(
985
self.approval_duration))
986
self.approval_duration = datetime.timedelta(0, 0, 0, value)
988
self.PropertyChanged(dbus.String("ApprovalDuration"),
989
dbus.UInt64(value, variant_level=1))
992
@dbus_service_property(_interface, signature="s", access="read")
993
def Name_dbus_property(self):
994
return dbus.String(self.name)
996
# Fingerprint - property
997
@dbus_service_property(_interface, signature="s", access="read")
998
def Fingerprint_dbus_property(self):
999
return dbus.String(self.fingerprint)
1002
@dbus_service_property(_interface, signature="s",
1004
def Host_dbus_property(self, value=None):
1005
if value is None: # get
1006
return dbus.String(self.host)
1009
self.PropertyChanged(dbus.String("Host"),
1010
dbus.String(value, variant_level=1))
1012
# Created - property
1013
@dbus_service_property(_interface, signature="s", access="read")
1014
def Created_dbus_property(self):
1015
return dbus.String(self._datetime_to_dbus(self.created))
1017
# LastEnabled - property
1018
@dbus_service_property(_interface, signature="s", access="read")
1019
def LastEnabled_dbus_property(self):
1020
if self.last_enabled is None:
1021
return dbus.String("")
1022
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1024
# Enabled - property
1025
@dbus_service_property(_interface, signature="b",
1027
def Enabled_dbus_property(self, value=None):
1028
if value is None: # get
1029
return dbus.Boolean(self.enabled)
1035
# LastCheckedOK - property
1036
@dbus_service_property(_interface, signature="s",
1038
def LastCheckedOK_dbus_property(self, value=None):
1039
if value is not None:
1042
if self.last_checked_ok is None:
1043
return dbus.String("")
1044
return dbus.String(self._datetime_to_dbus(self
1047
# LastApprovalRequest - property
1048
@dbus_service_property(_interface, signature="s", access="read")
1049
def LastApprovalRequest_dbus_property(self):
1050
if self.last_approval_request is None:
1051
return dbus.String("")
1052
return dbus.String(self.
1053
_datetime_to_dbus(self
1054
.last_approval_request))
1056
# Timeout - property
1057
@dbus_service_property(_interface, signature="t",
1059
def Timeout_dbus_property(self, value=None):
1060
if value is None: # get
1061
return dbus.UInt64(self.timeout_milliseconds())
1062
self.timeout = datetime.timedelta(0, 0, 0, value)
1064
self.PropertyChanged(dbus.String("Timeout"),
1065
dbus.UInt64(value, variant_level=1))
1066
if getattr(self, "disable_initiator_tag", None) is None:
1068
# Reschedule timeout
1069
gobject.source_remove(self.disable_initiator_tag)
1070
self.disable_initiator_tag = None
1071
time_to_die = (self.
1072
_timedelta_to_milliseconds((self
1077
if time_to_die <= 0:
1078
# The timeout has passed
1081
self.disable_initiator_tag = (gobject.timeout_add
1082
(time_to_die, self.disable))
1084
# Interval - property
1085
@dbus_service_property(_interface, signature="t",
1087
def Interval_dbus_property(self, value=None):
1088
if value is None: # get
1089
return dbus.UInt64(self.interval_milliseconds())
1090
self.interval = datetime.timedelta(0, 0, 0, value)
1092
self.PropertyChanged(dbus.String("Interval"),
1093
dbus.UInt64(value, variant_level=1))
1094
if getattr(self, "checker_initiator_tag", None) is None:
1096
# Reschedule checker run
1097
gobject.source_remove(self.checker_initiator_tag)
1098
self.checker_initiator_tag = (gobject.timeout_add
1099
(value, self.start_checker))
1100
self.start_checker() # Start one now, too
1102
# Checker - property
1103
@dbus_service_property(_interface, signature="s",
1105
def Checker_dbus_property(self, value=None):
1106
if value is None: # get
1107
return dbus.String(self.checker_command)
1108
self.checker_command = value
1110
self.PropertyChanged(dbus.String("Checker"),
1111
dbus.String(self.checker_command,
1114
# CheckerRunning - property
1115
@dbus_service_property(_interface, signature="b",
1117
def CheckerRunning_dbus_property(self, value=None):
1118
if value is None: # get
1119
return dbus.Boolean(self.checker is not None)
1121
self.start_checker()
1125
# ObjectPath - property
1126
@dbus_service_property(_interface, signature="o", access="read")
1127
def ObjectPath_dbus_property(self):
1128
return self.dbus_object_path # is already a dbus.ObjectPath
1131
@dbus_service_property(_interface, signature="ay",
1132
access="write", byte_arrays=True)
1133
def Secret_dbus_property(self, value):
1134
self.secret = str(value)
1139
class ProxyClient(object):
1140
def __init__(self, child_pipe, fpr, address):
1141
self._pipe = child_pipe
1142
self._pipe.send(('init', fpr, address))
1143
if not self._pipe.recv():
1146
def __getattribute__(self, name):
1147
if(name == '_pipe'):
1148
return super(ProxyClient, self).__getattribute__(name)
1149
self._pipe.send(('getattr', name))
1150
data = self._pipe.recv()
1151
if data[0] == 'data':
1153
if data[0] == 'function':
1154
def func(*args, **kwargs):
1155
self._pipe.send(('funcall', name, args, kwargs))
1156
return self._pipe.recv()[1]
1159
def __setattr__(self, name, value):
1160
if(name == '_pipe'):
1161
return super(ProxyClient, self).__setattr__(name, value)
1162
self._pipe.send(('setattr', name, value))
1165
class ClientHandler(socketserver.BaseRequestHandler, object):
1166
"""A class to handle client connections.
1168
Instantiated once for each connection to handle it.
1169
Note: This will run in its own forked process."""
1172
with contextlib.closing(self.server.child_pipe) as child_pipe:
1173
logger.info("TCP connection from: %s",
1174
unicode(self.client_address))
1175
logger.debug("Pipe FD: %d",
1176
self.server.child_pipe.fileno())
1178
session = (gnutls.connection
1179
.ClientSession(self.request,
1181
.X509Credentials()))
1183
# Note: gnutls.connection.X509Credentials is really a
1184
# generic GnuTLS certificate credentials object so long as
1185
# no X.509 keys are added to it. Therefore, we can use it
1186
# here despite using OpenPGP certificates.
1188
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1189
# "+AES-256-CBC", "+SHA1",
1190
# "+COMP-NULL", "+CTYPE-OPENPGP",
1192
# Use a fallback default, since this MUST be set.
1193
priority = self.server.gnutls_priority
1194
if priority is None:
1196
(gnutls.library.functions
1197
.gnutls_priority_set_direct(session._c_object,
1200
# Start communication using the Mandos protocol
1201
# Get protocol number
1202
line = self.request.makefile().readline()
1203
logger.debug("Protocol version: %r", line)
1205
if int(line.strip().split()[0]) > 1:
1207
except (ValueError, IndexError, RuntimeError), error:
1208
logger.error("Unknown protocol version: %s", error)
1211
# Start GnuTLS connection
1214
except gnutls.errors.GNUTLSError, error:
1215
logger.warning("Handshake failed: %s", error)
1216
# Do not run session.bye() here: the session is not
1217
# established. Just abandon the request.
1219
logger.debug("Handshake succeeded")
1221
approval_required = False
1224
fpr = self.fingerprint(self.peer_certificate
1226
except (TypeError, gnutls.errors.GNUTLSError), error:
1227
logger.warning("Bad certificate: %s", error)
1229
logger.debug("Fingerprint: %s", fpr)
1232
client = ProxyClient(child_pipe, fpr,
1233
self.client_address)
1237
if client.approval_delay:
1238
delay = client.approval_delay
1239
client.approvals_pending += 1
1240
approval_required = True
1243
if not client.enabled:
1244
logger.warning("Client %s is disabled",
1246
if self.server.use_dbus:
1248
client.Rejected("Disabled")
1251
if client._approved or not client.approval_delay:
1252
#We are approved or approval is disabled
1254
elif client._approved is None:
1255
logger.info("Client %s needs approval",
1257
if self.server.use_dbus:
1259
client.NeedApproval(
1260
client.approval_delay_milliseconds(),
1261
client.approved_by_default)
1263
logger.warning("Client %s was not approved",
1265
if self.server.use_dbus:
1267
client.Rejected("Denied")
1270
#wait until timeout or approved
1271
#x = float(client._timedelta_to_milliseconds(delay))
1272
time = datetime.datetime.now()
1273
client.changedstate.acquire()
1274
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1275
client.changedstate.release()
1276
time2 = datetime.datetime.now()
1277
if (time2 - time) >= delay:
1278
if not client.approved_by_default:
1279
logger.warning("Client %s timed out while"
1280
" waiting for approval",
1282
if self.server.use_dbus:
1284
client.Rejected("Approval timed out")
1289
delay -= time2 - time
1292
while sent_size < len(client.secret):
1294
sent = session.send(client.secret[sent_size:])
1295
except (gnutls.errors.GNUTLSError), error:
1296
logger.warning("gnutls send failed")
1298
logger.debug("Sent: %d, remaining: %d",
1299
sent, len(client.secret)
1300
- (sent_size + sent))
1303
logger.info("Sending secret to %s", client.name)
1304
# bump the timeout as if seen
1306
if self.server.use_dbus:
1311
if approval_required:
1312
client.approvals_pending -= 1
1315
except (gnutls.errors.GNUTLSError), error:
1316
logger.warning("GnuTLS bye failed")
1319
def peer_certificate(session):
1320
"Return the peer's OpenPGP certificate as a bytestring"
1321
# If not an OpenPGP certificate...
1322
if (gnutls.library.functions
1323
.gnutls_certificate_type_get(session._c_object)
1324
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1325
# ...do the normal thing
1326
return session.peer_certificate
1327
list_size = ctypes.c_uint(1)
1328
cert_list = (gnutls.library.functions
1329
.gnutls_certificate_get_peers
1330
(session._c_object, ctypes.byref(list_size)))
1331
if not bool(cert_list) and list_size.value != 0:
1332
raise gnutls.errors.GNUTLSError("error getting peer"
1334
if list_size.value == 0:
1337
return ctypes.string_at(cert.data, cert.size)
1340
def fingerprint(openpgp):
1341
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1342
# New GnuTLS "datum" with the OpenPGP public key
1343
datum = (gnutls.library.types
1344
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1347
ctypes.c_uint(len(openpgp))))
1348
# New empty GnuTLS certificate
1349
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1350
(gnutls.library.functions
1351
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1352
# Import the OpenPGP public key into the certificate
1353
(gnutls.library.functions
1354
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1355
gnutls.library.constants
1356
.GNUTLS_OPENPGP_FMT_RAW))
1357
# Verify the self signature in the key
1358
crtverify = ctypes.c_uint()
1359
(gnutls.library.functions
1360
.gnutls_openpgp_crt_verify_self(crt, 0,
1361
ctypes.byref(crtverify)))
1362
if crtverify.value != 0:
1363
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1364
raise (gnutls.errors.CertificateSecurityError
1366
# New buffer for the fingerprint
1367
buf = ctypes.create_string_buffer(20)
1368
buf_len = ctypes.c_size_t()
1369
# Get the fingerprint from the certificate into the buffer
1370
(gnutls.library.functions
1371
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1372
ctypes.byref(buf_len)))
1373
# Deinit the certificate
1374
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1375
# Convert the buffer to a Python bytestring
1376
fpr = ctypes.string_at(buf, buf_len.value)
1377
# Convert the bytestring to hexadecimal notation
1378
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1382
class MultiprocessingMixIn(object):
1383
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1384
def sub_process_main(self, request, address):
1386
self.finish_request(request, address)
1388
self.handle_error(request, address)
1389
self.close_request(request)
1391
def process_request(self, request, address):
1392
"""Start a new process to process the request."""
1393
multiprocessing.Process(target = self.sub_process_main,
1394
args = (request, address)).start()
1396
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1397
""" adds a pipe to the MixIn """
1398
def process_request(self, request, client_address):
1399
"""Overrides and wraps the original process_request().
1401
This function creates a new pipe in self.pipe
1403
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1405
super(MultiprocessingMixInWithPipe,
1406
self).process_request(request, client_address)
1407
self.child_pipe.close()
1408
self.add_pipe(parent_pipe)
1410
def add_pipe(self, parent_pipe):
1411
"""Dummy function; override as necessary"""
1412
raise NotImplementedError
1414
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1415
socketserver.TCPServer, object):
1416
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1419
enabled: Boolean; whether this server is activated yet
1420
interface: None or a network interface name (string)
1421
use_ipv6: Boolean; to use IPv6 or not
1423
def __init__(self, server_address, RequestHandlerClass,
1424
interface=None, use_ipv6=True):
1425
self.interface = interface
1427
self.address_family = socket.AF_INET6
1428
socketserver.TCPServer.__init__(self, server_address,
1429
RequestHandlerClass)
1430
def server_bind(self):
1431
"""This overrides the normal server_bind() function
1432
to bind to an interface if one was specified, and also NOT to
1433
bind to an address or port if they were not specified."""
1434
if self.interface is not None:
1435
if SO_BINDTODEVICE is None:
1436
logger.error("SO_BINDTODEVICE does not exist;"
1437
" cannot bind to interface %s",
53
1441
self.socket.setsockopt(socket.SOL_SOCKET,
54
socket.SO_BINDTODEVICE,
55
self.options.interface)
56
1445
except socket.error, error:
57
1446
if error[0] == errno.EPERM:
58
print "Warning: No permission to bind to interface", \
59
self.options.interface
1447
logger.error("No permission to"
1448
" bind to interface %s",
1450
elif error[0] == errno.ENOPROTOOPT:
1451
logger.error("SO_BINDTODEVICE not available;"
1452
" cannot bind to interface %s",
62
return super(type(self), self).server_bind()
63
attrs["server_bind"] = server_bind
64
def init(self, *args, **kwargs):
65
if "options" in kwargs:
66
self.options = kwargs["options"]
68
if "clients" in kwargs:
69
self.clients = kwargs["clients"]
71
if "credentials" in kwargs:
72
self.credentials = kwargs["credentials"]
73
del kwargs["credentials"]
74
return super(type(self), self).__init__(*args, **kwargs)
75
attrs["__init__"] = init
76
return type.__new__(cls, name, bases, attrs)
79
class udp_handler(SocketServer.DatagramRequestHandler, object):
81
self.wfile.write("Polo")
82
print "UDP request answered"
85
class IPv6_UDPServer(SocketServer.UDPServer, object):
86
__metaclass__ = server_metaclass
87
def verify_request(self, request, client_address):
88
print "UDP request came"
89
return request[0] == "Marco"
92
class tcp_handler(SocketServer.BaseRequestHandler, object):
94
print "TCP request came"
95
print "Request:", self.request
96
print "Client Address:", self.client_address
97
print "Server:", self.server
98
session = gnutls.connection.ServerSession(self.request,
99
self.server.credentials)
101
if session.peer_certificate:
102
print "DN:", session.peer_certificate.subject
104
session.verify_peer()
105
except gnutls.errors.CertificateError, error:
106
print "Verify failed", error
110
session.send(dict((client.dn, client.password)
111
for client in self.server.clients)
112
[session.peer_certificate.subject])
114
session.send("gazonk")
119
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
120
__metaclass__ = server_metaclass
121
request_queue_size = 1024
1456
# Only bind(2) the socket if we really need to.
1457
if self.server_address[0] or self.server_address[1]:
1458
if not self.server_address[0]:
1459
if self.address_family == socket.AF_INET6:
1460
any_address = "::" # in6addr_any
1462
any_address = socket.INADDR_ANY
1463
self.server_address = (any_address,
1464
self.server_address[1])
1465
elif not self.server_address[1]:
1466
self.server_address = (self.server_address[0],
1468
# if self.interface:
1469
# self.server_address = (self.server_address[0],
1474
return socketserver.TCPServer.server_bind(self)
1477
class MandosServer(IPv6_TCPServer):
1481
clients: set of Client objects
1482
gnutls_priority GnuTLS priority string
1483
use_dbus: Boolean; to emit D-Bus signals or not
1485
Assumes a gobject.MainLoop event loop.
1487
def __init__(self, server_address, RequestHandlerClass,
1488
interface=None, use_ipv6=True, clients=None,
1489
gnutls_priority=None, use_dbus=True):
1490
self.enabled = False
1491
self.clients = clients
1492
if self.clients is None:
1493
self.clients = set()
1494
self.use_dbus = use_dbus
1495
self.gnutls_priority = gnutls_priority
1496
IPv6_TCPServer.__init__(self, server_address,
1497
RequestHandlerClass,
1498
interface = interface,
1499
use_ipv6 = use_ipv6)
1500
def server_activate(self):
1502
return socketserver.TCPServer.server_activate(self)
1505
def add_pipe(self, parent_pipe):
1506
# Call "handle_ipc" for both data and EOF events
1507
gobject.io_add_watch(parent_pipe.fileno(),
1508
gobject.IO_IN | gobject.IO_HUP,
1509
functools.partial(self.handle_ipc,
1510
parent_pipe = parent_pipe))
1512
def handle_ipc(self, source, condition, parent_pipe=None,
1513
client_object=None):
1515
gobject.IO_IN: "IN", # There is data to read.
1516
gobject.IO_OUT: "OUT", # Data can be written (without
1518
gobject.IO_PRI: "PRI", # There is urgent data to read.
1519
gobject.IO_ERR: "ERR", # Error condition.
1520
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1521
# broken, usually for pipes and
1524
conditions_string = ' | '.join(name
1526
condition_names.iteritems()
1527
if cond & condition)
1528
# error or the other end of multiprocessing.Pipe has closed
1529
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1532
# Read a request from the child
1533
request = parent_pipe.recv()
1534
command = request[0]
1536
if command == 'init':
1538
address = request[2]
1540
for c in self.clients:
1541
if c.fingerprint == fpr:
1545
logger.warning("Client not found for fingerprint: %s, ad"
1546
"dress: %s", fpr, address)
1549
mandos_dbus_service.ClientNotFound(fpr, address[0])
1550
parent_pipe.send(False)
1553
gobject.io_add_watch(parent_pipe.fileno(),
1554
gobject.IO_IN | gobject.IO_HUP,
1555
functools.partial(self.handle_ipc,
1556
parent_pipe = parent_pipe,
1557
client_object = client))
1558
parent_pipe.send(True)
1559
# remove the old hook in favor of the new above hook on same fileno
1561
if command == 'funcall':
1562
funcname = request[1]
1566
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1568
if command == 'getattr':
1569
attrname = request[1]
1570
if callable(client_object.__getattribute__(attrname)):
1571
parent_pipe.send(('function',))
1573
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1575
if command == 'setattr':
1576
attrname = request[1]
1578
setattr(client_object, attrname, value)
128
1583
def string_to_delta(interval):
129
1584
"""Parse a string and return a datetime.timedelta
131
1586
>>> string_to_delta('7d')
132
1587
datetime.timedelta(7)
133
1588
>>> string_to_delta('60s')
136
1591
datetime.timedelta(0, 3600)
137
1592
>>> string_to_delta('24h')
138
1593
datetime.timedelta(1)
139
>>> string_to_delta(u'1w')
1594
>>> string_to_delta('1w')
140
1595
datetime.timedelta(7)
1596
>>> string_to_delta('5m 30s')
1597
datetime.timedelta(0, 330)
1599
timevalue = datetime.timedelta(0)
1600
for s in interval.split():
1602
suffix = unicode(s[-1])
1605
delta = datetime.timedelta(value)
1607
delta = datetime.timedelta(0, value)
1609
delta = datetime.timedelta(0, 0, 0, 0, value)
1611
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1613
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1615
raise ValueError("Unknown suffix %r" % suffix)
1616
except (ValueError, IndexError), e:
1617
raise ValueError(*(e.args))
1622
def if_nametoindex(interface):
1623
"""Call the C function if_nametoindex(), or equivalent
1625
Note: This function cannot accept a unicode string."""
1626
global if_nametoindex
143
suffix=unicode(interval[-1])
144
value=int(interval[:-1])
146
delta = datetime.timedelta(value)
148
delta = datetime.timedelta(0, value)
150
delta = datetime.timedelta(0, 0, 0, 0, value)
152
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
154
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
157
except (ValueError, IndexError):
1628
if_nametoindex = (ctypes.cdll.LoadLibrary
1629
(ctypes.util.find_library("c"))
1631
except (OSError, AttributeError):
1632
logger.warning("Doing if_nametoindex the hard way")
1633
def if_nametoindex(interface):
1634
"Get an interface index the hard way, i.e. using fcntl()"
1635
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1636
with contextlib.closing(socket.socket()) as s:
1637
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1638
struct.pack(str("16s16x"),
1640
interface_index = struct.unpack(str("I"),
1642
return interface_index
1643
return if_nametoindex(interface)
1646
def daemon(nochdir = False, noclose = False):
1647
"""See daemon(3). Standard BSD Unix function.
1649
This should really exist as os.daemon, but it doesn't (yet)."""
1658
# Close all standard open file descriptors
1659
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1660
if not stat.S_ISCHR(os.fstat(null).st_mode):
1661
raise OSError(errno.ENODEV,
1662
"%s not a character device"
1664
os.dup2(null, sys.stdin.fileno())
1665
os.dup2(null, sys.stdout.fileno())
1666
os.dup2(null, sys.stderr.fileno())
162
parser = OptionParser()
163
parser.add_option("-i", "--interface", type="string",
164
default="eth0", metavar="IF",
165
help="Interface to bind to")
166
parser.add_option("--cert", type="string", default="cert.pem",
168
help="Public key certificate to use")
169
parser.add_option("--key", type="string", default="key.pem",
171
help="Private key to use")
172
parser.add_option("--ca", type="string", default="ca.pem",
174
help="Certificate Authority certificate to use")
175
parser.add_option("--crl", type="string", default="crl.pem",
177
help="Certificate Revokation List to use")
178
parser.add_option("-p", "--port", type="int", default=49001,
179
help="Port number to receive requests on")
180
parser.add_option("--dh", type="int", metavar="BITS",
181
help="DH group to use")
182
parser.add_option("-t", "--timeout", type="string", # Parsed later
184
help="Amount of downtime allowed for clients")
185
parser.add_option("--interval", type="string", # Parsed later
187
help="How often to check that a client is up")
188
parser.add_option("--check", action="store_true", default=False,
189
help="Run self-test")
190
(options, args) = parser.parse_args()
1673
##################################################################
1674
# Parsing of options, both command line and config file
1676
parser = argparse.ArgumentParser()
1677
parser.add_argument("-v", "--version", action="version",
1678
version = "%%(prog)s %s" % version,
1679
help="show version number and exit")
1680
parser.add_argument("-i", "--interface", metavar="IF",
1681
help="Bind to interface IF")
1682
parser.add_argument("-a", "--address",
1683
help="Address to listen for requests on")
1684
parser.add_argument("-p", "--port", type=int,
1685
help="Port number to receive requests on")
1686
parser.add_argument("--check", action="store_true",
1687
help="Run self-test")
1688
parser.add_argument("--debug", action="store_true",
1689
help="Debug mode; run in foreground and log"
1691
parser.add_argument("--debuglevel", metavar="LEVEL",
1692
help="Debug level for stdout output")
1693
parser.add_argument("--priority", help="GnuTLS"
1694
" priority string (see GnuTLS documentation)")
1695
parser.add_argument("--servicename",
1696
metavar="NAME", help="Zeroconf service name")
1697
parser.add_argument("--configdir",
1698
default="/etc/mandos", metavar="DIR",
1699
help="Directory to search for configuration"
1701
parser.add_argument("--no-dbus", action="store_false",
1702
dest="use_dbus", help="Do not provide D-Bus"
1703
" system bus interface")
1704
parser.add_argument("--no-ipv6", action="store_false",
1705
dest="use_ipv6", help="Do not use IPv6")
1706
options = parser.parse_args()
192
1708
if options.check:
194
1710
doctest.testmod()
197
# Parse the time arguments
199
options.timeout = string_to_delta(options.timeout)
201
parser.error("option --timeout: Unparseable time")
204
options.interval = string_to_delta(options.interval)
206
parser.error("option --interval: Unparseable time")
208
cert = gnutls.crypto.X509Certificate(open(options.cert).read())
209
key = gnutls.crypto.X509PrivateKey(open(options.key).read())
210
ca = gnutls.crypto.X509Certificate(open(options.ca).read())
211
crl = gnutls.crypto.X509CRL(open(options.crl).read())
212
cred = gnutls.connection.X509Credentials(cert, key, [ca], [crl])
216
client_config_object = ConfigParser.SafeConfigParser(defaults)
217
client_config_object.read("mandos-clients.conf")
218
clients = [Client(name=section, options=options,
219
**(dict(client_config_object.items(section))))
220
for section in client_config_object.sections()]
222
udp_server = IPv6_UDPServer((in6addr_any, options.port),
226
tcp_server = IPv6_TCPServer((in6addr_any, options.port),
233
in_, out, err = select.select((udp_server,
236
server.handle_request()
239
if __name__ == "__main__":
1713
# Default values for config file for server-global settings
1714
server_defaults = { "interface": "",
1719
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1720
"servicename": "Mandos",
1726
# Parse config file for server-global settings
1727
server_config = configparser.SafeConfigParser(server_defaults)
1729
server_config.read(os.path.join(options.configdir,
1731
# Convert the SafeConfigParser object to a dict
1732
server_settings = server_config.defaults()
1733
# Use the appropriate methods on the non-string config options
1734
for option in ("debug", "use_dbus", "use_ipv6"):
1735
server_settings[option] = server_config.getboolean("DEFAULT",
1737
if server_settings["port"]:
1738
server_settings["port"] = server_config.getint("DEFAULT",
1742
# Override the settings from the config file with command line
1744
for option in ("interface", "address", "port", "debug",
1745
"priority", "servicename", "configdir",
1746
"use_dbus", "use_ipv6", "debuglevel"):
1747
value = getattr(options, option)
1748
if value is not None:
1749
server_settings[option] = value
1751
# Force all strings to be unicode
1752
for option in server_settings.keys():
1753
if type(server_settings[option]) is str:
1754
server_settings[option] = unicode(server_settings[option])
1755
# Now we have our good server settings in "server_settings"
1757
##################################################################
1760
debug = server_settings["debug"]
1761
debuglevel = server_settings["debuglevel"]
1762
use_dbus = server_settings["use_dbus"]
1763
use_ipv6 = server_settings["use_ipv6"]
1765
if server_settings["servicename"] != "Mandos":
1766
syslogger.setFormatter(logging.Formatter
1767
('Mandos (%s) [%%(process)d]:'
1768
' %%(levelname)s: %%(message)s'
1769
% server_settings["servicename"]))
1771
# Parse config file with clients
1772
client_defaults = { "timeout": "1h",
1774
"checker": "fping -q -- %%(host)s",
1776
"approval_delay": "0s",
1777
"approval_duration": "1s",
1779
client_config = configparser.SafeConfigParser(client_defaults)
1780
client_config.read(os.path.join(server_settings["configdir"],
1783
global mandos_dbus_service
1784
mandos_dbus_service = None
1786
tcp_server = MandosServer((server_settings["address"],
1787
server_settings["port"]),
1789
interface=(server_settings["interface"]
1793
server_settings["priority"],
1796
pidfilename = "/var/run/mandos.pid"
1798
pidfile = open(pidfilename, "w")
1800
logger.error("Could not open file %r", pidfilename)
1803
uid = pwd.getpwnam("_mandos").pw_uid
1804
gid = pwd.getpwnam("_mandos").pw_gid
1807
uid = pwd.getpwnam("mandos").pw_uid
1808
gid = pwd.getpwnam("mandos").pw_gid
1811
uid = pwd.getpwnam("nobody").pw_uid
1812
gid = pwd.getpwnam("nobody").pw_gid
1819
except OSError, error:
1820
if error[0] != errno.EPERM:
1823
if not debug and not debuglevel:
1824
syslogger.setLevel(logging.WARNING)
1825
console.setLevel(logging.WARNING)
1827
level = getattr(logging, debuglevel.upper())
1828
syslogger.setLevel(level)
1829
console.setLevel(level)
1832
# Enable all possible GnuTLS debugging
1834
# "Use a log level over 10 to enable all debugging options."
1836
gnutls.library.functions.gnutls_global_set_log_level(11)
1838
@gnutls.library.types.gnutls_log_func
1839
def debug_gnutls(level, string):
1840
logger.debug("GnuTLS: %s", string[:-1])
1842
(gnutls.library.functions
1843
.gnutls_global_set_log_function(debug_gnutls))
1845
# Redirect stdin so all checkers get /dev/null
1846
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1847
os.dup2(null, sys.stdin.fileno())
1851
# No console logging
1852
logger.removeHandler(console)
1854
# Need to fork before connecting to D-Bus
1856
# Close all input and output, do double fork, etc.
1860
# From the Avahi example code
1861
DBusGMainLoop(set_as_default=True )
1862
main_loop = gobject.MainLoop()
1863
bus = dbus.SystemBus()
1864
# End of Avahi example code
1867
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1868
bus, do_not_queue=True)
1869
except dbus.exceptions.NameExistsException, e:
1870
logger.error(unicode(e) + ", disabling D-Bus")
1872
server_settings["use_dbus"] = False
1873
tcp_server.use_dbus = False
1874
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1875
service = AvahiService(name = server_settings["servicename"],
1876
servicetype = "_mandos._tcp",
1877
protocol = protocol, bus = bus)
1878
if server_settings["interface"]:
1879
service.interface = (if_nametoindex
1880
(str(server_settings["interface"])))
1882
global multiprocessing_manager
1883
multiprocessing_manager = multiprocessing.Manager()
1885
client_class = Client
1887
client_class = functools.partial(ClientDBus, bus = bus)
1888
def client_config_items(config, section):
1889
special_settings = {
1890
"approved_by_default":
1891
lambda: config.getboolean(section,
1892
"approved_by_default"),
1894
for name, value in config.items(section):
1896
yield (name, special_settings[name]())
1900
tcp_server.clients.update(set(
1901
client_class(name = section,
1902
config= dict(client_config_items(
1903
client_config, section)))
1904
for section in client_config.sections()))
1905
if not tcp_server.clients:
1906
logger.warning("No clients defined")
1912
pidfile.write(str(pid) + "\n".encode("utf-8"))
1915
logger.error("Could not write to file %r with PID %d",
1918
# "pidfile" was never created
1922
signal.signal(signal.SIGINT, signal.SIG_IGN)
1924
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1925
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1928
class MandosDBusService(dbus.service.Object):
1929
"""A D-Bus proxy object"""
1931
dbus.service.Object.__init__(self, bus, "/")
1932
_interface = "se.bsnet.fukt.Mandos"
1934
@dbus.service.signal(_interface, signature="o")
1935
def ClientAdded(self, objpath):
1939
@dbus.service.signal(_interface, signature="ss")
1940
def ClientNotFound(self, fingerprint, address):
1944
@dbus.service.signal(_interface, signature="os")
1945
def ClientRemoved(self, objpath, name):
1949
@dbus.service.method(_interface, out_signature="ao")
1950
def GetAllClients(self):
1952
return dbus.Array(c.dbus_object_path
1953
for c in tcp_server.clients)
1955
@dbus.service.method(_interface,
1956
out_signature="a{oa{sv}}")
1957
def GetAllClientsWithProperties(self):
1959
return dbus.Dictionary(
1960
((c.dbus_object_path, c.GetAll(""))
1961
for c in tcp_server.clients),
1964
@dbus.service.method(_interface, in_signature="o")
1965
def RemoveClient(self, object_path):
1967
for c in tcp_server.clients:
1968
if c.dbus_object_path == object_path:
1969
tcp_server.clients.remove(c)
1970
c.remove_from_connection()
1971
# Don't signal anything except ClientRemoved
1972
c.disable(quiet=True)
1974
self.ClientRemoved(object_path, c.name)
1976
raise KeyError(object_path)
1980
mandos_dbus_service = MandosDBusService()
1983
"Cleanup function; run on exit"
1986
while tcp_server.clients:
1987
client = tcp_server.clients.pop()
1989
client.remove_from_connection()
1990
client.disable_hook = None
1991
# Don't signal anything except ClientRemoved
1992
client.disable(quiet=True)
1995
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1998
atexit.register(cleanup)
2000
for client in tcp_server.clients:
2003
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2007
tcp_server.server_activate()
2009
# Find out what port we got
2010
service.port = tcp_server.socket.getsockname()[1]
2012
logger.info("Now listening on address %r, port %d,"
2013
" flowinfo %d, scope_id %d"
2014
% tcp_server.socket.getsockname())
2016
logger.info("Now listening on address %r, port %d"
2017
% tcp_server.socket.getsockname())
2019
#service.interface = tcp_server.socket.getsockname()[3]
2022
# From the Avahi example code
2025
except dbus.exceptions.DBusException, error:
2026
logger.critical("DBusException: %s", error)
2029
# End of Avahi example code
2031
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2032
lambda *args, **kwargs:
2033
(tcp_server.handle_request
2034
(*args[2:], **kwargs) or True))
2036
logger.debug("Starting main loop")
2038
except AvahiError, error:
2039
logger.critical("AvahiError: %s", error)
2042
except KeyboardInterrupt:
2044
print("", file=sys.stderr)
2045
logger.debug("Server received KeyboardInterrupt")
2046
logger.debug("Server exiting")
2047
# Must run before the D-Bus bus name gets deregistered
2050
if __name__ == '__main__':