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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 © 2008,2009 Teddy Hogeborn
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# Copyright © 2008,2009 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, with_statement, absolute_import
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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.Logger(u'mandos')
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syslogger = (logging.handlers.SysLogHandler
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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = "/dev/log"))
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syslogger.setFormatter(logging.Formatter
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(u'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(u'%(name)s [%(process)d]:'
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logger.addHandler(console)
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multiprocessing_manager = multiprocessing.Manager()
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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: u'Mandos'
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type: string; Example: u'_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 = u"", host = u"", 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(u"No suitable Zeroconf service name found"
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u" after %i retries, exiting.",
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raise AvahiServiceError(u"Too many renames")
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self.name = self.server.GetAlternativeServiceName(self.name)
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logger.info(u"Changing Zeroconf service name to %r ...",
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syslogger.setFormatter(logging.Formatter
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(u'Mandos (%s) [%%(process)d]:'
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u' %%(levelname)s: %%(message)s'
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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(u"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(u"Avahi state change: %i", state)
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if state == avahi.ENTRY_GROUP_ESTABLISHED:
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logger.debug(u"Zeroconf service established.")
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elif state == avahi.ENTRY_GROUP_COLLISION:
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logger.warning(u"Zeroconf service name collision.")
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elif state == avahi.ENTRY_GROUP_FAILURE:
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logger.critical(u"Avahi: Error in group state changed %s",
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raise AvahiGroupError(u"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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if state == avahi.SERVER_COLLISION:
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logger.error(u"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(u"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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"""A representation of a client host served by this server.
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name: string; from the config file, used in log messages and
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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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secret: bytestring; sent verbatim (over TLS) to client
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host: string; available for use by the checker command
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created: datetime.datetime(); (UTC) object creation
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last_enabled: datetime.datetime(); (UTC)
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last_checked_ok: datetime.datetime(); (UTC) or None
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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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interval: datetime.timedelta(); How often to start a new checker
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disable_hook: If set, called by disable() as disable_hook(self)
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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_initiator_tag: a gobject event source tag, or None
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disable_initiator_tag: - '' -
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checker_callback_tag: - '' -
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checker_command: string; External command which is run to check if
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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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current_checker_command: string; current running checker_command
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approved_delay: datetime.timedelta(); Time to wait for approval
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_approved: bool(); 'None' if not yet approved/disapproved
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approved_duration: datetime.timedelta(); Duration of one approval
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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 approved_delay_milliseconds(self):
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return self._timedelta_to_milliseconds(self.approved_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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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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logger.debug(u"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[u"fingerprint"].upper()
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logger.debug(u" Fingerprint: %s", self.fingerprint)
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if u"secret" in config:
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self.secret = config[u"secret"].decode(u"base64")
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elif u"secfile" in config:
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with open(os.path.expanduser(os.path.expandvars
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(config[u"secfile"])),
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self.secret = secfile.read()
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self.password = password
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self.password = open(passfile).readall()
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#XXX Need to allow secret on demand!
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raise TypeError(u"No secret or secfile for client %s"
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self.host = config.get(u"host", u"")
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self.created = datetime.datetime.utcnow()
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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[u"timeout"])
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self.interval = string_to_delta(config[u"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[u"checker"]
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self.current_checker_command = None
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self.last_connect = None
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self.approvals_pending = 0
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self._approved = None
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self.approved_by_default = config.get(u"approved_by_default",
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self.approved_delay = string_to_delta(
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config[u"approved_delay"])
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self.approved_duration = string_to_delta(
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config[u"approved_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, u"enabled", False):
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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.fqdn = fqdn # string
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self.created = datetime.datetime.now()
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self.last_seen = None # datetime.datetime()
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timeout = options.timeout
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self.timeout = timeout # datetime.timedelta()
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interval = options.interval
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self.interval = interval # datetime.timedelta()
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self.next_check = datetime.datetime.now() # datetime.datetime()
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self.checker = None # or a subprocess.Popen()
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def check_action(self, now=None):
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"""The checker said something and might have completed.
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Check if is has, and take appropriate actions."""
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if self.checker.poll() is None:
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# False alarm, no result yet
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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(u"Disabling client %s", self.name)
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if getattr(self, u"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, u"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(u"Checker for %(name)s succeeded",
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logger.info(u"Checker for %(name)s failed",
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logger.warning(u"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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now = datetime.datetime.now()
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if self.checker.returncode == 0:
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while self.next_check <= now:
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self.next_check += self.interval
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handle_request = check_action
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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(u"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((key,
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re.escape(unicode(str(val),
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vars(self).iteritems())
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command = self.checker_command % escaped_attrs
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except TypeError, error:
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logger.error(u'Could not format string "%s":'
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u' %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(u"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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shell=True, cwd=u"/")
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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(u"Failed to start subprocess: %s",
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# Re-run this periodically if run by gobject.timeout_add
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self.checker = subprocess.Popen("sleep 1; fping -q -- %s"
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% re.escape(self.fqdn),
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stdout=subprocess.PIPE,
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except subprocess.OSError, e:
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print "Failed to start subprocess:", e
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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:
491
gobject.source_remove(self.checker_callback_tag)
492
self.checker_callback_tag = None
493
if getattr(self, u"checker", None) is None:
495
logger.debug(u"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=u"v",
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access=u"readwrite", byte_arrays=False):
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"""Decorators for marking methods of a DBusObjectWithProperties to
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become properties on the D-Bus.
511
The decorated method will be called with no arguments by "Get"
512
and with one argument by "Set".
514
The parameters, where they are supported, are the same as
515
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
519
# "Set" method, so we fail early here:
520
if byte_arrays and signature != u"ay":
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raise ValueError(u"Byte arrays not supported for non-'ay'"
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u" 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(u"_dbus_property"):
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func._dbus_name = func._dbus_name[:-14]
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func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
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class DBusPropertyException(dbus.exceptions.DBusException):
537
"""A base class for D-Bus property-related exceptions
539
def __unicode__(self):
540
return unicode(str(self))
543
class DBusPropertyAccessException(DBusPropertyException):
544
"""A property's access permissions disallows an operation.
549
class DBusPropertyNotFound(DBusPropertyException):
550
"""An attempt was made to access a non-existing property.
555
class DBusObjectWithProperties(dbus.service.Object):
556
"""A D-Bus object with properties.
558
Classes inheriting from this can use the dbus_service_property
559
decorator to expose methods as D-Bus properties. It exposes the
560
standard Get(), Set(), and GetAll() methods on the D-Bus.
564
def _is_dbus_property(obj):
565
return getattr(obj, u"_dbus_is_property", False)
567
def _get_all_dbus_properties(self):
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"""Returns a generator of (name, attribute) pairs
570
return ((prop._dbus_name, prop)
572
inspect.getmembers(self, self._is_dbus_property))
574
def _get_dbus_property(self, interface_name, property_name):
575
"""Returns a bound method if one exists which is a D-Bus
576
property with the specified name and interface.
578
for name in (property_name,
579
property_name + u"_dbus_property"):
580
prop = getattr(self, name, None)
582
or not self._is_dbus_property(prop)
583
or prop._dbus_name != property_name
584
or (interface_name and prop._dbus_interface
585
and interface_name != prop._dbus_interface)):
589
raise DBusPropertyNotFound(self.dbus_object_path + u":"
590
+ interface_name + u"."
593
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
595
def Get(self, interface_name, property_name):
596
"""Standard D-Bus property Get() method, see D-Bus standard.
598
prop = self._get_dbus_property(interface_name, property_name)
599
if prop._dbus_access == u"write":
600
raise DBusPropertyAccessException(property_name)
602
if not hasattr(value, u"variant_level"):
604
return type(value)(value, variant_level=value.variant_level+1)
606
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
607
def Set(self, interface_name, property_name, value):
608
"""Standard D-Bus property Set() method, see D-Bus standard.
610
prop = self._get_dbus_property(interface_name, property_name)
611
if prop._dbus_access == u"read":
612
raise DBusPropertyAccessException(property_name)
613
if prop._dbus_get_args_options[u"byte_arrays"]:
614
# The byte_arrays option is not supported yet on
615
# signatures other than "ay".
616
if prop._dbus_signature != u"ay":
618
value = dbus.ByteArray(''.join(unichr(byte)
622
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
623
out_signature=u"a{sv}")
624
def GetAll(self, interface_name):
625
"""Standard D-Bus property GetAll() method, see D-Bus
628
Note: Will not include properties with access="write".
631
for name, prop in self._get_all_dbus_properties():
633
and interface_name != prop._dbus_interface):
634
# Interface non-empty but did not match
636
# Ignore write-only properties
637
if prop._dbus_access == u"write":
640
if not hasattr(value, u"variant_level"):
643
all[name] = type(value)(value, variant_level=
644
value.variant_level+1)
645
return dbus.Dictionary(all, signature=u"sv")
647
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
649
path_keyword='object_path',
650
connection_keyword='connection')
651
def Introspect(self, object_path, connection):
652
"""Standard D-Bus method, overloaded to insert property tags.
654
xmlstring = dbus.service.Object.Introspect(self, object_path,
657
document = xml.dom.minidom.parseString(xmlstring)
658
def make_tag(document, name, prop):
659
e = document.createElement(u"property")
660
e.setAttribute(u"name", name)
661
e.setAttribute(u"type", prop._dbus_signature)
662
e.setAttribute(u"access", prop._dbus_access)
664
for if_tag in document.getElementsByTagName(u"interface"):
665
for tag in (make_tag(document, name, prop)
667
in self._get_all_dbus_properties()
668
if prop._dbus_interface
669
== if_tag.getAttribute(u"name")):
670
if_tag.appendChild(tag)
671
# Add the names to the return values for the
672
# "org.freedesktop.DBus.Properties" methods
673
if (if_tag.getAttribute(u"name")
674
== u"org.freedesktop.DBus.Properties"):
675
for cn in if_tag.getElementsByTagName(u"method"):
676
if cn.getAttribute(u"name") == u"Get":
677
for arg in cn.getElementsByTagName(u"arg"):
678
if (arg.getAttribute(u"direction")
680
arg.setAttribute(u"name", u"value")
681
elif cn.getAttribute(u"name") == u"GetAll":
682
for arg in cn.getElementsByTagName(u"arg"):
683
if (arg.getAttribute(u"direction")
685
arg.setAttribute(u"name", u"props")
686
xmlstring = document.toxml(u"utf-8")
688
except (AttributeError, xml.dom.DOMException,
689
xml.parsers.expat.ExpatError), error:
690
logger.error(u"Failed to override Introspection method",
695
class ClientDBus(Client, DBusObjectWithProperties):
696
"""A Client class using D-Bus
699
dbus_object_path: dbus.ObjectPath
700
bus: dbus.SystemBus()
702
# dbus.service.Object doesn't use super(), so we can't either.
704
def __init__(self, bus = None, *args, **kwargs):
706
Client.__init__(self, *args, **kwargs)
707
# Only now, when this client is initialized, can it show up on
709
self.dbus_object_path = (dbus.ObjectPath
711
+ self.name.replace(u".", u"_")))
712
DBusObjectWithProperties.__init__(self, self.bus,
713
self.dbus_object_path)
716
def _datetime_to_dbus(dt, variant_level=0):
717
"""Convert a UTC datetime.datetime() to a D-Bus type."""
718
return dbus.String(dt.isoformat(),
719
variant_level=variant_level)
722
oldstate = getattr(self, u"enabled", False)
723
r = Client.enable(self)
724
if oldstate != self.enabled:
726
self.PropertyChanged(dbus.String(u"enabled"),
727
dbus.Boolean(True, variant_level=1))
728
self.PropertyChanged(
729
dbus.String(u"last_enabled"),
730
self._datetime_to_dbus(self.last_enabled,
734
def disable(self, quiet = False):
735
oldstate = getattr(self, u"enabled", False)
736
r = Client.disable(self, quiet=quiet)
737
if not quiet and oldstate != self.enabled:
739
self.PropertyChanged(dbus.String(u"enabled"),
740
dbus.Boolean(False, variant_level=1))
743
def __del__(self, *args, **kwargs):
745
self.remove_from_connection()
748
if hasattr(DBusObjectWithProperties, u"__del__"):
749
DBusObjectWithProperties.__del__(self, *args, **kwargs)
750
Client.__del__(self, *args, **kwargs)
752
def checker_callback(self, pid, condition, command,
754
self.checker_callback_tag = None
757
self.PropertyChanged(dbus.String(u"checker_running"),
758
dbus.Boolean(False, variant_level=1))
759
if os.WIFEXITED(condition):
760
exitstatus = os.WEXITSTATUS(condition)
762
self.CheckerCompleted(dbus.Int16(exitstatus),
763
dbus.Int64(condition),
764
dbus.String(command))
767
self.CheckerCompleted(dbus.Int16(-1),
768
dbus.Int64(condition),
769
dbus.String(command))
771
return Client.checker_callback(self, pid, condition, command,
774
def checked_ok(self, *args, **kwargs):
775
r = Client.checked_ok(self, *args, **kwargs)
777
self.PropertyChanged(
778
dbus.String(u"last_checked_ok"),
779
(self._datetime_to_dbus(self.last_checked_ok,
783
def start_checker(self, *args, **kwargs):
784
old_checker = self.checker
785
if self.checker is not None:
786
old_checker_pid = self.checker.pid
788
old_checker_pid = None
789
r = Client.start_checker(self, *args, **kwargs)
790
# Only if new checker process was started
791
if (self.checker is not None
792
and old_checker_pid != self.checker.pid):
794
self.CheckerStarted(self.current_checker_command)
795
self.PropertyChanged(
796
dbus.String(u"checker_running"),
797
dbus.Boolean(True, variant_level=1))
800
def stop_checker(self, *args, **kwargs):
801
old_checker = getattr(self, u"checker", None)
802
r = Client.stop_checker(self, *args, **kwargs)
803
if (old_checker is not None
804
and getattr(self, u"checker", None) is None):
805
self.PropertyChanged(dbus.String(u"checker_running"),
806
dbus.Boolean(False, variant_level=1))
809
def _reset_approved(self):
810
self._approved = None
813
def approve(self, value=True):
814
self._approved = value
815
gobject.timeout_add(self._timedelta_to_milliseconds(self.approved_duration, self._reset_approved))
817
def approved_pending(self):
818
return self.approvals_pending > 0
821
## D-Bus methods, signals & properties
822
_interface = u"se.bsnet.fukt.Mandos.Client"
826
# CheckerCompleted - signal
827
@dbus.service.signal(_interface, signature=u"nxs")
828
def CheckerCompleted(self, exitcode, waitstatus, command):
832
# CheckerStarted - signal
833
@dbus.service.signal(_interface, signature=u"s")
834
def CheckerStarted(self, command):
838
# PropertyChanged - signal
839
@dbus.service.signal(_interface, signature=u"sv")
840
def PropertyChanged(self, property, value):
845
@dbus.service.signal(_interface)
851
@dbus.service.signal(_interface, signature=u"s")
852
def Rejected(self, reason):
856
# NeedApproval - signal
857
@dbus.service.signal(_interface, signature=u"db")
858
def NeedApproval(self, timeout, default):
865
@dbus.service.method(_interface, in_signature=u"b")
866
def Approve(self, value):
870
@dbus.service.method(_interface)
872
return self.checked_ok()
875
@dbus.service.method(_interface)
880
# StartChecker - method
881
@dbus.service.method(_interface)
882
def StartChecker(self):
887
@dbus.service.method(_interface)
892
# StopChecker - method
893
@dbus.service.method(_interface)
894
def StopChecker(self):
899
# approved_pending - property
900
@dbus_service_property(_interface, signature=u"b", access=u"read")
901
def approved_pending_dbus_property(self):
902
return dbus.Boolean(self.approved_pending())
904
# approved_by_default - property
905
@dbus_service_property(_interface, signature=u"b",
907
def approved_by_default_dbus_property(self):
908
return dbus.Boolean(self.approved_by_default)
910
# approved_delay - property
911
@dbus_service_property(_interface, signature=u"t",
913
def approved_delay_dbus_property(self):
914
return dbus.UInt64(self.approved_delay_milliseconds())
916
# approved_duration - property
917
@dbus_service_property(_interface, signature=u"t",
919
def approved_duration_dbus_property(self):
920
return dbus.UInt64(self._timedelta_to_milliseconds(
921
self.approved_duration))
924
@dbus_service_property(_interface, signature=u"s", access=u"read")
925
def name_dbus_property(self):
926
return dbus.String(self.name)
928
# fingerprint - property
929
@dbus_service_property(_interface, signature=u"s", access=u"read")
930
def fingerprint_dbus_property(self):
931
return dbus.String(self.fingerprint)
934
@dbus_service_property(_interface, signature=u"s",
936
def host_dbus_property(self, value=None):
937
if value is None: # get
938
return dbus.String(self.host)
941
self.PropertyChanged(dbus.String(u"host"),
942
dbus.String(value, variant_level=1))
945
@dbus_service_property(_interface, signature=u"s", access=u"read")
946
def created_dbus_property(self):
947
return dbus.String(self._datetime_to_dbus(self.created))
949
# last_enabled - property
950
@dbus_service_property(_interface, signature=u"s", access=u"read")
951
def last_enabled_dbus_property(self):
952
if self.last_enabled is None:
953
return dbus.String(u"")
954
return dbus.String(self._datetime_to_dbus(self.last_enabled))
957
@dbus_service_property(_interface, signature=u"b",
959
def enabled_dbus_property(self, value=None):
960
if value is None: # get
961
return dbus.Boolean(self.enabled)
967
# last_checked_ok - property
968
@dbus_service_property(_interface, signature=u"s",
970
def last_checked_ok_dbus_property(self, value=None):
971
if value is not None:
974
if self.last_checked_ok is None:
975
return dbus.String(u"")
976
return dbus.String(self._datetime_to_dbus(self
980
@dbus_service_property(_interface, signature=u"t",
982
def timeout_dbus_property(self, value=None):
983
if value is None: # get
984
return dbus.UInt64(self.timeout_milliseconds())
985
self.timeout = datetime.timedelta(0, 0, 0, value)
987
self.PropertyChanged(dbus.String(u"timeout"),
988
dbus.UInt64(value, variant_level=1))
989
if getattr(self, u"disable_initiator_tag", None) is None:
992
gobject.source_remove(self.disable_initiator_tag)
993
self.disable_initiator_tag = None
995
_timedelta_to_milliseconds((self
1000
if time_to_die <= 0:
1001
# The timeout has passed
1004
self.disable_initiator_tag = (gobject.timeout_add
1005
(time_to_die, self.disable))
1007
# interval - property
1008
@dbus_service_property(_interface, signature=u"t",
1009
access=u"readwrite")
1010
def interval_dbus_property(self, value=None):
1011
if value is None: # get
1012
return dbus.UInt64(self.interval_milliseconds())
1013
self.interval = datetime.timedelta(0, 0, 0, value)
1015
self.PropertyChanged(dbus.String(u"interval"),
1016
dbus.UInt64(value, variant_level=1))
1017
if getattr(self, u"checker_initiator_tag", None) is None:
1019
# Reschedule checker run
1020
gobject.source_remove(self.checker_initiator_tag)
1021
self.checker_initiator_tag = (gobject.timeout_add
1022
(value, self.start_checker))
1023
self.start_checker() # Start one now, too
1025
# checker - property
1026
@dbus_service_property(_interface, signature=u"s",
1027
access=u"readwrite")
1028
def checker_dbus_property(self, value=None):
1029
if value is None: # get
1030
return dbus.String(self.checker_command)
1031
self.checker_command = value
1033
self.PropertyChanged(dbus.String(u"checker"),
1034
dbus.String(self.checker_command,
1037
# checker_running - property
1038
@dbus_service_property(_interface, signature=u"b",
1039
access=u"readwrite")
1040
def checker_running_dbus_property(self, value=None):
1041
if value is None: # get
1042
return dbus.Boolean(self.checker is not None)
1044
self.start_checker()
1048
# object_path - property
1049
@dbus_service_property(_interface, signature=u"o", access=u"read")
1050
def object_path_dbus_property(self):
1051
return self.dbus_object_path # is already a dbus.ObjectPath
1054
@dbus_service_property(_interface, signature=u"ay",
1055
access=u"write", byte_arrays=True)
1056
def secret_dbus_property(self, value):
1057
self.secret = str(value)
1062
class ProxyClient(object):
1063
def __init__(self, child_pipe, fpr, address):
1064
self._pipe = child_pipe
1065
self._pipe.send(('init', fpr, address))
1066
if not self._pipe.recv():
1069
def __getattribute__(self, name):
1070
if(name == '_pipe'):
1071
return super(ProxyClient, self).__getattribute__(name)
1072
self._pipe.send(('getattr', name))
1073
data = self._pipe.recv()
1074
if data[0] == 'data':
1076
if data[0] == 'function':
1077
def func(*args, **kwargs):
1078
self._pipe.send(('funcall', name, args, kwargs))
1079
return self._pipe.recv()[1]
1082
def __setattr__(self, name, value):
1083
if(name == '_pipe'):
1084
return super(ProxyClient, self).__setattr__(name, value)
1085
self._pipe.send(('setattr', name, value))
1088
class ClientHandler(socketserver.BaseRequestHandler, object):
1089
"""A class to handle client connections.
1091
Instantiated once for each connection to handle it.
1092
Note: This will run in its own forked process."""
1095
with contextlib.closing(self.server.child_pipe) as child_pipe:
1096
logger.info(u"TCP connection from: %s",
1097
unicode(self.client_address))
1098
logger.debug(u"Pipe FD: %d",
1099
self.server.child_pipe.fileno())
1101
session = (gnutls.connection
1102
.ClientSession(self.request,
1104
.X509Credentials()))
1106
# Note: gnutls.connection.X509Credentials is really a
1107
# generic GnuTLS certificate credentials object so long as
1108
# no X.509 keys are added to it. Therefore, we can use it
1109
# here despite using OpenPGP certificates.
1111
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1112
# u"+AES-256-CBC", u"+SHA1",
1113
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1115
# Use a fallback default, since this MUST be set.
1116
priority = self.server.gnutls_priority
1117
if priority is None:
1118
priority = u"NORMAL"
1119
(gnutls.library.functions
1120
.gnutls_priority_set_direct(session._c_object,
1123
# Start communication using the Mandos protocol
1124
# Get protocol number
1125
line = self.request.makefile().readline()
1126
logger.debug(u"Protocol version: %r", line)
1128
if int(line.strip().split()[0]) > 1:
1130
except (ValueError, IndexError, RuntimeError), error:
1131
logger.error(u"Unknown protocol version: %s", error)
1134
# Start GnuTLS connection
1137
except gnutls.errors.GNUTLSError, error:
1138
logger.warning(u"Handshake failed: %s", error)
1139
# Do not run session.bye() here: the session is not
1140
# established. Just abandon the request.
1142
logger.debug(u"Handshake succeeded")
1144
approval_required = False
1147
fpr = self.fingerprint(self.peer_certificate
1149
except (TypeError, gnutls.errors.GNUTLSError), error:
1150
logger.warning(u"Bad certificate: %s", error)
1152
logger.debug(u"Fingerprint: %s", fpr)
1155
client = ProxyClient(child_pipe, fpr,
1156
self.client_address)
1160
if client.approved_delay:
1161
delay = client.approved_delay
1162
client.approvals_pending += 1
1163
approval_required = True
1166
if not client.enabled:
1167
logger.warning(u"Client %s is disabled",
1169
if self.server.use_dbus:
1171
client.Rejected("Disabled")
1174
if client._approved or not client.approved_delay:
1175
#We are approved or approval is disabled
1177
elif client._approved is None:
1178
logger.info(u"Client %s need approval",
1180
if self.server.use_dbus:
1182
client.NeedApproval(
1183
client.approved_delay_milliseconds(),
1184
client.approved_by_default)
1186
logger.warning(u"Client %s was not approved",
1188
if self.server.use_dbus:
1190
client.Rejected("Disapproved")
1193
#wait until timeout or approved
1194
#x = float(client._timedelta_to_milliseconds(delay))
1195
time = datetime.datetime.now()
1196
client.changedstate.acquire()
1197
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1198
client.changedstate.release()
1199
time2 = datetime.datetime.now()
1200
if (time2 - time) >= delay:
1201
if not client.approved_by_default:
1202
logger.warning("Client %s timed out while"
1203
" waiting for approval",
1205
if self.server.use_dbus:
1207
client.Rejected("Time out")
1212
delay -= time2 - time
1215
while sent_size < len(client.secret):
1216
# XXX handle session exception
1217
sent = session.send(client.secret[sent_size:])
1218
logger.debug(u"Sent: %d, remaining: %d",
1219
sent, len(client.secret)
1220
- (sent_size + sent))
1223
logger.info(u"Sending secret to %s", client.name)
1224
# bump the timeout as if seen
1226
if self.server.use_dbus:
1231
if approval_required:
1232
client.approvals_pending -= 1
1236
def peer_certificate(session):
1237
"Return the peer's OpenPGP certificate as a bytestring"
1238
# If not an OpenPGP certificate...
1239
if (gnutls.library.functions
1240
.gnutls_certificate_type_get(session._c_object)
1241
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1242
# ...do the normal thing
1243
return session.peer_certificate
1244
list_size = ctypes.c_uint(1)
1245
cert_list = (gnutls.library.functions
1246
.gnutls_certificate_get_peers
1247
(session._c_object, ctypes.byref(list_size)))
1248
if not bool(cert_list) and list_size.value != 0:
1249
raise gnutls.errors.GNUTLSError(u"error getting peer"
1251
if list_size.value == 0:
68
if self.checker is None:
70
os.kill(self.checker.pid, signal.SIGTERM)
71
if self.checker.poll() is None:
72
os.kill(self.checker.pid, signal.SIGKILL)
74
__del__ = stop_checker
76
if self.checker is None:
1254
return ctypes.string_at(cert.data, cert.size)
1257
def fingerprint(openpgp):
1258
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1259
# New GnuTLS "datum" with the OpenPGP public key
1260
datum = (gnutls.library.types
1261
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1264
ctypes.c_uint(len(openpgp))))
1265
# New empty GnuTLS certificate
1266
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1267
(gnutls.library.functions
1268
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1269
# Import the OpenPGP public key into the certificate
1270
(gnutls.library.functions
1271
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1272
gnutls.library.constants
1273
.GNUTLS_OPENPGP_FMT_RAW))
1274
# Verify the self signature in the key
1275
crtverify = ctypes.c_uint()
1276
(gnutls.library.functions
1277
.gnutls_openpgp_crt_verify_self(crt, 0,
1278
ctypes.byref(crtverify)))
1279
if crtverify.value != 0:
1280
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1281
raise (gnutls.errors.CertificateSecurityError
1283
# New buffer for the fingerprint
1284
buf = ctypes.create_string_buffer(20)
1285
buf_len = ctypes.c_size_t()
1286
# Get the fingerprint from the certificate into the buffer
1287
(gnutls.library.functions
1288
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1289
ctypes.byref(buf_len)))
1290
# Deinit the certificate
1291
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1292
# Convert the buffer to a Python bytestring
1293
fpr = ctypes.string_at(buf, buf_len.value)
1294
# Convert the bytestring to hexadecimal notation
1295
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1299
class MultiprocessingMixIn(object):
1300
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1301
def sub_process_main(self, request, address):
1303
self.finish_request(request, address)
1305
self.handle_error(request, address)
1306
self.close_request(request)
1308
def process_request(self, request, address):
1309
"""Start a new process to process the request."""
1310
multiprocessing.Process(target = self.sub_process_main,
1311
args = (request, address)).start()
1313
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1314
""" adds a pipe to the MixIn """
1315
def process_request(self, request, client_address):
1316
"""Overrides and wraps the original process_request().
1318
This function creates a new pipe in self.pipe
1320
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1322
super(MultiprocessingMixInWithPipe,
1323
self).process_request(request, client_address)
1324
self.add_pipe(parent_pipe)
1325
def add_pipe(self, parent_pipe):
1326
"""Dummy function; override as necessary"""
1329
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1330
socketserver.TCPServer, object):
1331
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1334
enabled: Boolean; whether this server is activated yet
1335
interface: None or a network interface name (string)
1336
use_ipv6: Boolean; to use IPv6 or not
1338
def __init__(self, server_address, RequestHandlerClass,
1339
interface=None, use_ipv6=True):
1340
self.interface = interface
1342
self.address_family = socket.AF_INET6
1343
socketserver.TCPServer.__init__(self, server_address,
1344
RequestHandlerClass)
1345
def server_bind(self):
1346
"""This overrides the normal server_bind() function
1347
to bind to an interface if one was specified, and also NOT to
1348
bind to an address or port if they were not specified."""
1349
if self.interface is not None:
1350
if SO_BINDTODEVICE is None:
1351
logger.error(u"SO_BINDTODEVICE does not exist;"
1352
u" cannot bind to interface %s",
78
return self.checker.stdout.fileno()
80
"""The time when something must be done about this client"""
81
return min(self.last_seen + self.timeout, self.next_check)
82
def still_valid(self, now=None):
83
"""Has this client's timeout not passed?"""
85
now = datetime.datetime.now()
86
return now < (self.last_seen + timeout)
87
def it_is_time_to_check(self, now=None):
89
now = datetime.datetime.now()
90
return self.next_check <= now
93
class server_metaclass(type):
94
"Common behavior for the UDP and TCP server classes"
95
def __new__(cls, name, bases, attrs):
96
attrs["address_family"] = socket.AF_INET6
97
attrs["allow_reuse_address"] = True
98
def server_bind(self):
99
if self.options.interface:
100
if not hasattr(socket, "SO_BINDTODEVICE"):
101
# From /usr/include/asm-i486/socket.h
102
socket.SO_BINDTODEVICE = 25
1356
104
self.socket.setsockopt(socket.SOL_SOCKET,
105
socket.SO_BINDTODEVICE,
106
self.options.interface)
1360
107
except socket.error, error:
1361
108
if error[0] == errno.EPERM:
1362
logger.error(u"No permission to"
1363
u" bind to interface %s",
1365
elif error[0] == errno.ENOPROTOOPT:
1366
logger.error(u"SO_BINDTODEVICE not available;"
1367
u" cannot bind to interface %s",
109
print "Warning: No permission to bind to interface", \
110
self.options.interface
1371
# Only bind(2) the socket if we really need to.
1372
if self.server_address[0] or self.server_address[1]:
1373
if not self.server_address[0]:
1374
if self.address_family == socket.AF_INET6:
1375
any_address = u"::" # in6addr_any
1377
any_address = socket.INADDR_ANY
1378
self.server_address = (any_address,
1379
self.server_address[1])
1380
elif not self.server_address[1]:
1381
self.server_address = (self.server_address[0],
1383
# if self.interface:
1384
# self.server_address = (self.server_address[0],
1389
return socketserver.TCPServer.server_bind(self)
1392
class MandosServer(IPv6_TCPServer):
1396
clients: set of Client objects
1397
gnutls_priority GnuTLS priority string
1398
use_dbus: Boolean; to emit D-Bus signals or not
1400
Assumes a gobject.MainLoop event loop.
1402
def __init__(self, server_address, RequestHandlerClass,
1403
interface=None, use_ipv6=True, clients=None,
1404
gnutls_priority=None, use_dbus=True):
1405
self.enabled = False
1406
self.clients = clients
1407
if self.clients is None:
1408
self.clients = set()
1409
self.use_dbus = use_dbus
1410
self.gnutls_priority = gnutls_priority
1411
IPv6_TCPServer.__init__(self, server_address,
1412
RequestHandlerClass,
1413
interface = interface,
1414
use_ipv6 = use_ipv6)
1415
def server_activate(self):
1417
return socketserver.TCPServer.server_activate(self)
1420
def add_pipe(self, parent_pipe):
1421
# Call "handle_ipc" for both data and EOF events
1422
gobject.io_add_watch(parent_pipe.fileno(),
1423
gobject.IO_IN | gobject.IO_HUP,
1424
functools.partial(self.handle_ipc,
1425
parent_pipe = parent_pipe))
1427
def handle_ipc(self, source, condition, parent_pipe=None,
1428
client_object=None):
1430
gobject.IO_IN: u"IN", # There is data to read.
1431
gobject.IO_OUT: u"OUT", # Data can be written (without
1433
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1434
gobject.IO_ERR: u"ERR", # Error condition.
1435
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1436
# broken, usually for pipes and
1439
conditions_string = ' | '.join(name
1441
condition_names.iteritems()
1442
if cond & condition)
1443
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1446
# Read a request from the child
1447
request = parent_pipe.recv()
1448
command = request[0]
1450
if command == 'init':
1452
address = request[2]
1454
for c in self.clients:
1455
if c.fingerprint == fpr:
1459
logger.warning(u"Client not found for fingerprint: %s, ad"
1460
u"dress: %s", fpr, address)
1463
mandos_dbus_service.ClientNotFound(fpr, address)
1464
parent_pipe.send(False)
1467
gobject.io_add_watch(parent_pipe.fileno(),
1468
gobject.IO_IN | gobject.IO_HUP,
1469
functools.partial(self.handle_ipc,
1470
parent_pipe = parent_pipe,
1471
client_object = client))
1472
parent_pipe.send(True)
1473
# remove the old hook in favor of the new above hook on same fileno
1475
if command == 'funcall':
1476
funcname = request[1]
1480
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1482
if command == 'getattr':
1483
attrname = request[1]
1484
if callable(client_object.__getattribute__(attrname)):
1485
parent_pipe.send(('function',))
1487
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1489
if command == 'setattr':
1490
attrname = request[1]
1492
setattr(client_object, attrname, value)
113
return super(type(self), self).server_bind()
114
attrs["server_bind"] = server_bind
115
def init(self, *args, **kwargs):
116
if "options" in kwargs:
117
self.options = kwargs["options"]
118
del kwargs["options"]
119
if "clients" in kwargs:
120
self.clients = kwargs["clients"]
121
del kwargs["clients"]
122
if "credentials" in kwargs:
123
self.credentials = kwargs["credentials"]
124
del kwargs["credentials"]
125
return super(type(self), self).__init__(*args, **kwargs)
126
attrs["__init__"] = init
127
return type.__new__(cls, name, bases, attrs)
130
class udp_handler(SocketServer.DatagramRequestHandler, object):
132
self.wfile.write("Polo")
133
print "UDP request answered"
136
class IPv6_UDPServer(SocketServer.UDPServer, object):
137
__metaclass__ = server_metaclass
138
def verify_request(self, request, client_address):
139
print "UDP request came"
140
return request[0] == "Marco"
143
class tcp_handler(SocketServer.BaseRequestHandler, object):
145
print "TCP request came"
146
print "Request:", self.request
147
print "Client Address:", self.client_address
148
print "Server:", self.server
149
session = gnutls.connection.ServerSession(self.request,
150
self.server.credentials)
152
if session.peer_certificate:
153
print "DN:", session.peer_certificate.subject
155
session.verify_peer()
156
except gnutls.errors.CertificateError, error:
157
print "Verify failed", error
161
session.send(dict((client.dn, client.password)
162
for client in self.server.clients)
163
[session.peer_certificate.subject])
165
session.send("gazonk")
170
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
171
__metaclass__ = server_metaclass
172
request_queue_size = 1024
1497
177
def string_to_delta(interval):
1498
178
"""Parse a string and return a datetime.timedelta
1500
>>> string_to_delta(u'7d')
180
>>> string_to_delta('7d')
1501
181
datetime.timedelta(7)
1502
>>> string_to_delta(u'60s')
182
>>> string_to_delta('60s')
1503
183
datetime.timedelta(0, 60)
1504
>>> string_to_delta(u'60m')
184
>>> string_to_delta('60m')
1505
185
datetime.timedelta(0, 3600)
1506
>>> string_to_delta(u'24h')
186
>>> string_to_delta('24h')
1507
187
datetime.timedelta(1)
1508
188
>>> string_to_delta(u'1w')
1509
189
datetime.timedelta(7)
1510
>>> string_to_delta(u'5m 30s')
1511
datetime.timedelta(0, 330)
1513
timevalue = datetime.timedelta(0)
1514
for s in interval.split():
1516
suffix = unicode(s[-1])
1519
delta = datetime.timedelta(value)
1520
elif suffix == u"s":
1521
delta = datetime.timedelta(0, value)
1522
elif suffix == u"m":
1523
delta = datetime.timedelta(0, 0, 0, 0, value)
1524
elif suffix == u"h":
1525
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1526
elif suffix == u"w":
1527
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1529
raise ValueError(u"Unknown suffix %r" % suffix)
1530
except (ValueError, IndexError), e:
1531
raise ValueError(e.message)
1536
def if_nametoindex(interface):
1537
"""Call the C function if_nametoindex(), or equivalent
1539
Note: This function cannot accept a unicode string."""
1540
global if_nametoindex
1542
if_nametoindex = (ctypes.cdll.LoadLibrary
1543
(ctypes.util.find_library(u"c"))
1545
except (OSError, AttributeError):
1546
logger.warning(u"Doing if_nametoindex the hard way")
1547
def if_nametoindex(interface):
1548
"Get an interface index the hard way, i.e. using fcntl()"
1549
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1550
with contextlib.closing(socket.socket()) as s:
1551
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1552
struct.pack(str(u"16s16x"),
1554
interface_index = struct.unpack(str(u"I"),
1556
return interface_index
1557
return if_nametoindex(interface)
1560
def daemon(nochdir = False, noclose = False):
1561
"""See daemon(3). Standard BSD Unix function.
1563
This should really exist as os.daemon, but it doesn't (yet)."""
1572
# Close all standard open file descriptors
1573
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1574
if not stat.S_ISCHR(os.fstat(null).st_mode):
1575
raise OSError(errno.ENODEV,
1576
u"%s not a character device"
1578
os.dup2(null, sys.stdin.fileno())
1579
os.dup2(null, sys.stdout.fileno())
1580
os.dup2(null, sys.stderr.fileno())
192
suffix=unicode(interval[-1])
193
value=int(interval[:-1])
195
delta = datetime.timedelta(value)
197
delta = datetime.timedelta(0, value)
199
delta = datetime.timedelta(0, 0, 0, 0, value)
201
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
203
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
206
except (ValueError, IndexError):
1587
##################################################################
1588
# Parsing of options, both command line and config file
1590
parser = optparse.OptionParser(version = "%%prog %s" % version)
1591
parser.add_option("-i", u"--interface", type=u"string",
1592
metavar="IF", help=u"Bind to interface IF")
1593
parser.add_option("-a", u"--address", type=u"string",
1594
help=u"Address to listen for requests on")
1595
parser.add_option("-p", u"--port", type=u"int",
1596
help=u"Port number to receive requests on")
1597
parser.add_option("--check", action=u"store_true",
1598
help=u"Run self-test")
1599
parser.add_option("--debug", action=u"store_true",
1600
help=u"Debug mode; run in foreground and log to"
1602
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1603
u" priority string (see GnuTLS documentation)")
1604
parser.add_option("--servicename", type=u"string",
1605
metavar=u"NAME", help=u"Zeroconf service name")
1606
parser.add_option("--configdir", type=u"string",
1607
default=u"/etc/mandos", metavar=u"DIR",
1608
help=u"Directory to search for configuration"
1610
parser.add_option("--no-dbus", action=u"store_false",
1611
dest=u"use_dbus", help=u"Do not provide D-Bus"
1612
u" system bus interface")
1613
parser.add_option("--no-ipv6", action=u"store_false",
1614
dest=u"use_ipv6", help=u"Do not use IPv6")
1615
options = parser.parse_args()[0]
212
parser = OptionParser()
213
parser.add_option("-i", "--interface", type="string",
214
default="eth0", metavar="IF",
215
help="Interface to bind to")
216
parser.add_option("--cert", type="string", default="cert.pem",
218
help="Public key certificate to use")
219
parser.add_option("--key", type="string", default="key.pem",
221
help="Private key to use")
222
parser.add_option("--ca", type="string", default="ca.pem",
224
help="Certificate Authority certificate to use")
225
parser.add_option("--crl", type="string", default="crl.pem",
227
help="Certificate Revokation List to use")
228
parser.add_option("-p", "--port", type="int", default=49001,
229
help="Port number to receive requests on")
230
parser.add_option("--dh", type="int", metavar="BITS",
231
help="DH group to use")
232
parser.add_option("-t", "--timeout", type="string", # Parsed later
234
help="Amount of downtime allowed for clients")
235
parser.add_option("--interval", type="string", # Parsed later
237
help="How often to check that a client is up")
238
parser.add_option("--check", action="store_true", default=False,
239
help="Run self-test")
240
(options, args) = parser.parse_args()
1617
242
if options.check:
1619
244
doctest.testmod()
1622
# Default values for config file for server-global settings
1623
server_defaults = { u"interface": u"",
1628
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1629
u"servicename": u"Mandos",
1630
u"use_dbus": u"True",
1631
u"use_ipv6": u"True",
1634
# Parse config file for server-global settings
1635
server_config = configparser.SafeConfigParser(server_defaults)
1637
server_config.read(os.path.join(options.configdir,
1639
# Convert the SafeConfigParser object to a dict
1640
server_settings = server_config.defaults()
1641
# Use the appropriate methods on the non-string config options
1642
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1643
server_settings[option] = server_config.getboolean(u"DEFAULT",
1645
if server_settings["port"]:
1646
server_settings["port"] = server_config.getint(u"DEFAULT",
1650
# Override the settings from the config file with command line
1652
for option in (u"interface", u"address", u"port", u"debug",
1653
u"priority", u"servicename", u"configdir",
1654
u"use_dbus", u"use_ipv6"):
1655
value = getattr(options, option)
1656
if value is not None:
1657
server_settings[option] = value
1659
# Force all strings to be unicode
1660
for option in server_settings.keys():
1661
if type(server_settings[option]) is str:
1662
server_settings[option] = unicode(server_settings[option])
1663
# Now we have our good server settings in "server_settings"
1665
##################################################################
1668
debug = server_settings[u"debug"]
1669
use_dbus = server_settings[u"use_dbus"]
1670
use_ipv6 = server_settings[u"use_ipv6"]
1673
syslogger.setLevel(logging.WARNING)
1674
console.setLevel(logging.WARNING)
1676
if server_settings[u"servicename"] != u"Mandos":
1677
syslogger.setFormatter(logging.Formatter
1678
(u'Mandos (%s) [%%(process)d]:'
1679
u' %%(levelname)s: %%(message)s'
1680
% server_settings[u"servicename"]))
1682
# Parse config file with clients
1683
client_defaults = { u"timeout": u"1h",
1685
u"checker": u"fping -q -- %%(host)s",
1687
u"approved_delay": u"5m",
1688
u"approved_duration": u"1s",
1690
client_config = configparser.SafeConfigParser(client_defaults)
1691
client_config.read(os.path.join(server_settings[u"configdir"],
1694
global mandos_dbus_service
1695
mandos_dbus_service = None
1697
tcp_server = MandosServer((server_settings[u"address"],
1698
server_settings[u"port"]),
1700
interface=server_settings[u"interface"],
1703
server_settings[u"priority"],
1705
pidfilename = u"/var/run/mandos.pid"
1707
pidfile = open(pidfilename, u"w")
1709
logger.error(u"Could not open file %r", pidfilename)
1712
uid = pwd.getpwnam(u"_mandos").pw_uid
1713
gid = pwd.getpwnam(u"_mandos").pw_gid
1716
uid = pwd.getpwnam(u"mandos").pw_uid
1717
gid = pwd.getpwnam(u"mandos").pw_gid
1720
uid = pwd.getpwnam(u"nobody").pw_uid
1721
gid = pwd.getpwnam(u"nobody").pw_gid
1728
except OSError, error:
1729
if error[0] != errno.EPERM:
1732
# Enable all possible GnuTLS debugging
1734
# "Use a log level over 10 to enable all debugging options."
1736
gnutls.library.functions.gnutls_global_set_log_level(11)
1738
@gnutls.library.types.gnutls_log_func
1739
def debug_gnutls(level, string):
1740
logger.debug(u"GnuTLS: %s", string[:-1])
1742
(gnutls.library.functions
1743
.gnutls_global_set_log_function(debug_gnutls))
1746
# From the Avahi example code
1747
DBusGMainLoop(set_as_default=True )
1748
main_loop = gobject.MainLoop()
1749
bus = dbus.SystemBus()
1750
# End of Avahi example code
1753
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1754
bus, do_not_queue=True)
1755
except dbus.exceptions.NameExistsException, e:
1756
logger.error(unicode(e) + u", disabling D-Bus")
1758
server_settings[u"use_dbus"] = False
1759
tcp_server.use_dbus = False
1760
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1761
service = AvahiService(name = server_settings[u"servicename"],
1762
servicetype = u"_mandos._tcp",
1763
protocol = protocol, bus = bus)
1764
if server_settings["interface"]:
1765
service.interface = (if_nametoindex
1766
(str(server_settings[u"interface"])))
1768
client_class = Client
1770
client_class = functools.partial(ClientDBus, bus = bus)
1771
def client_config_items(config, section):
1772
special_settings = {
1773
"approved_by_default":
1774
lambda: config.getboolean(section,
1775
"approved_by_default"),
1777
for name, value in config.items(section):
1779
yield (name, special_settings[name]())
1783
tcp_server.clients.update(set(
1784
client_class(name = section,
1785
config= dict(client_config_items(
1786
client_config, section)))
1787
for section in client_config.sections()))
1788
if not tcp_server.clients:
1789
logger.warning(u"No clients defined")
1792
# Redirect stdin so all checkers get /dev/null
1793
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1794
os.dup2(null, sys.stdin.fileno())
1798
# No console logging
1799
logger.removeHandler(console)
1800
# Close all input and output, do double fork, etc.
1806
pidfile.write(str(pid) + "\n")
1809
logger.error(u"Could not write to file %r with PID %d",
1812
# "pidfile" was never created
1817
signal.signal(signal.SIGINT, signal.SIG_IGN)
1818
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1819
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1822
class MandosDBusService(dbus.service.Object):
1823
"""A D-Bus proxy object"""
1825
dbus.service.Object.__init__(self, bus, u"/")
1826
_interface = u"se.bsnet.fukt.Mandos"
1828
@dbus.service.signal(_interface, signature=u"o")
1829
def ClientAdded(self, objpath):
1833
@dbus.service.signal(_interface, signature=u"ss")
1834
def ClientNotFound(self, fingerprint, address):
1838
@dbus.service.signal(_interface, signature=u"os")
1839
def ClientRemoved(self, objpath, name):
1843
@dbus.service.method(_interface, out_signature=u"ao")
1844
def GetAllClients(self):
1846
return dbus.Array(c.dbus_object_path
1847
for c in tcp_server.clients)
1849
@dbus.service.method(_interface,
1850
out_signature=u"a{oa{sv}}")
1851
def GetAllClientsWithProperties(self):
1853
return dbus.Dictionary(
1854
((c.dbus_object_path, c.GetAll(u""))
1855
for c in tcp_server.clients),
1856
signature=u"oa{sv}")
1858
@dbus.service.method(_interface, in_signature=u"o")
1859
def RemoveClient(self, object_path):
1861
for c in tcp_server.clients:
1862
if c.dbus_object_path == object_path:
1863
tcp_server.clients.remove(c)
1864
c.remove_from_connection()
1865
# Don't signal anything except ClientRemoved
1866
c.disable(quiet=True)
1868
self.ClientRemoved(object_path, c.name)
1870
raise KeyError(object_path)
1874
mandos_dbus_service = MandosDBusService()
1877
"Cleanup function; run on exit"
1880
while tcp_server.clients:
1881
client = tcp_server.clients.pop()
1883
client.remove_from_connection()
1884
client.disable_hook = None
1885
# Don't signal anything except ClientRemoved
1886
client.disable(quiet=True)
1889
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1892
atexit.register(cleanup)
1894
for client in tcp_server.clients:
1897
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1901
tcp_server.server_activate()
1903
# Find out what port we got
1904
service.port = tcp_server.socket.getsockname()[1]
1906
logger.info(u"Now listening on address %r, port %d,"
1907
" flowinfo %d, scope_id %d"
1908
% tcp_server.socket.getsockname())
1910
logger.info(u"Now listening on address %r, port %d"
1911
% tcp_server.socket.getsockname())
1913
#service.interface = tcp_server.socket.getsockname()[3]
1916
# From the Avahi example code
1919
except dbus.exceptions.DBusException, error:
1920
logger.critical(u"DBusException: %s", error)
1923
# End of Avahi example code
1925
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1926
lambda *args, **kwargs:
1927
(tcp_server.handle_request
1928
(*args[2:], **kwargs) or True))
1930
logger.debug(u"Starting main loop")
1932
except AvahiError, error:
1933
logger.critical(u"AvahiError: %s", error)
1936
except KeyboardInterrupt:
1939
logger.debug(u"Server received KeyboardInterrupt")
1940
logger.debug(u"Server exiting")
1941
# Must run before the D-Bus bus name gets deregistered
1944
if __name__ == '__main__':
247
# Parse the time arguments
249
options.timeout = string_to_delta(options.timeout)
251
parser.error("option --timeout: Unparseable time")
254
options.interval = string_to_delta(options.interval)
256
parser.error("option --interval: Unparseable time")
258
cert = gnutls.crypto.X509Certificate(open(options.cert).read())
259
key = gnutls.crypto.X509PrivateKey(open(options.key).read())
260
ca = gnutls.crypto.X509Certificate(open(options.ca).read())
261
crl = gnutls.crypto.X509CRL(open(options.crl).read())
262
cred = gnutls.connection.X509Credentials(cert, key, [ca], [crl])
266
client_config_object = ConfigParser.SafeConfigParser(defaults)
267
client_config_object.read("mandos-clients.conf")
268
clients = [Client(name=section, options=options,
269
**(dict(client_config_object.items(section))))
270
for section in client_config_object.sections()]
272
udp_server = IPv6_UDPServer((in6addr_any, options.port),
276
tcp_server = IPv6_TCPServer((in6addr_any, options.port),
284
input, out, err = select.select((udp_server,
291
except KeyboardInterrupt:
295
for client in clients:
296
client.stop_checker()
299
if __name__ == "__main__":