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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.getLogger(u'mandos')
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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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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 = unicode(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 entry group 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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logger.debug(u"Avahi server state change: %i", state)
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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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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._approved = None
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self.approved_by_default = config.get(u"approved_by_default",
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self.approvals_pending = 0
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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
467
# always replaced by /dev/null.)
468
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."""
489
if self.checker_callback_tag:
490
gobject.source_remove(self.checker_callback_tag)
491
self.checker_callback_tag = None
492
if getattr(self, u"checker", None) is None:
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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)
500
except OSError, error:
501
if error.errno != errno.ESRCH: # No such process
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def dbus_service_property(dbus_interface, signature=u"v",
506
access=u"readwrite", byte_arrays=False):
507
"""Decorators for marking methods of a DBusObjectWithProperties to
508
become properties on the D-Bus.
510
The decorated method will be called with no arguments by "Get"
511
and with one argument by "Set".
513
The parameters, where they are supported, are the same as
514
dbus.service.method, except there is only "signature", since the
515
type from Get() and the type sent to Set() is the same.
517
# Encoding deeply encoded byte arrays is not supported yet by the
518
# "Set" method, so we fail early here:
519
if byte_arrays and signature != u"ay":
520
raise ValueError(u"Byte arrays not supported for non-'ay'"
521
u" signature %r" % signature)
523
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]
530
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
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class DBusPropertyException(dbus.exceptions.DBusException):
536
"""A base class for D-Bus property-related exceptions
538
def __unicode__(self):
539
return unicode(str(self))
542
class DBusPropertyAccessException(DBusPropertyException):
543
"""A property's access permissions disallows an operation.
548
class DBusPropertyNotFound(DBusPropertyException):
549
"""An attempt was made to access a non-existing property.
554
class DBusObjectWithProperties(dbus.service.Object):
555
"""A D-Bus object with properties.
557
Classes inheriting from this can use the dbus_service_property
558
decorator to expose methods as D-Bus properties. It exposes the
559
standard Get(), Set(), and GetAll() methods on the D-Bus.
563
def _is_dbus_property(obj):
564
return getattr(obj, u"_dbus_is_property", False)
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def _get_all_dbus_properties(self):
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"""Returns a generator of (name, attribute) pairs
569
return ((prop._dbus_name, prop)
571
inspect.getmembers(self, self._is_dbus_property))
573
def _get_dbus_property(self, interface_name, property_name):
574
"""Returns a bound method if one exists which is a D-Bus
575
property with the specified name and interface.
577
for name in (property_name,
578
property_name + u"_dbus_property"):
579
prop = getattr(self, name, None)
581
or not self._is_dbus_property(prop)
582
or prop._dbus_name != property_name
583
or (interface_name and prop._dbus_interface
584
and interface_name != prop._dbus_interface)):
588
raise DBusPropertyNotFound(self.dbus_object_path + u":"
589
+ interface_name + u"."
592
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
594
def Get(self, interface_name, property_name):
595
"""Standard D-Bus property Get() method, see D-Bus standard.
597
prop = self._get_dbus_property(interface_name, property_name)
598
if prop._dbus_access == u"write":
599
raise DBusPropertyAccessException(property_name)
601
if not hasattr(value, u"variant_level"):
603
return type(value)(value, variant_level=value.variant_level+1)
605
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
606
def Set(self, interface_name, property_name, value):
607
"""Standard D-Bus property Set() method, see D-Bus standard.
609
prop = self._get_dbus_property(interface_name, property_name)
610
if prop._dbus_access == u"read":
611
raise DBusPropertyAccessException(property_name)
612
if prop._dbus_get_args_options[u"byte_arrays"]:
613
# The byte_arrays option is not supported yet on
614
# signatures other than "ay".
615
if prop._dbus_signature != u"ay":
617
value = dbus.ByteArray(''.join(unichr(byte)
621
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
622
out_signature=u"a{sv}")
623
def GetAll(self, interface_name):
624
"""Standard D-Bus property GetAll() method, see D-Bus
627
Note: Will not include properties with access="write".
630
for name, prop in self._get_all_dbus_properties():
632
and interface_name != prop._dbus_interface):
633
# Interface non-empty but did not match
635
# Ignore write-only properties
636
if prop._dbus_access == u"write":
639
if not hasattr(value, u"variant_level"):
642
all[name] = type(value)(value, variant_level=
643
value.variant_level+1)
644
return dbus.Dictionary(all, signature=u"sv")
646
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
648
path_keyword='object_path',
649
connection_keyword='connection')
650
def Introspect(self, object_path, connection):
651
"""Standard D-Bus method, overloaded to insert property tags.
653
xmlstring = dbus.service.Object.Introspect(self, object_path,
656
document = xml.dom.minidom.parseString(xmlstring)
657
def make_tag(document, name, prop):
658
e = document.createElement(u"property")
659
e.setAttribute(u"name", name)
660
e.setAttribute(u"type", prop._dbus_signature)
661
e.setAttribute(u"access", prop._dbus_access)
663
for if_tag in document.getElementsByTagName(u"interface"):
664
for tag in (make_tag(document, name, prop)
666
in self._get_all_dbus_properties()
667
if prop._dbus_interface
668
== if_tag.getAttribute(u"name")):
669
if_tag.appendChild(tag)
670
# Add the names to the return values for the
671
# "org.freedesktop.DBus.Properties" methods
672
if (if_tag.getAttribute(u"name")
673
== u"org.freedesktop.DBus.Properties"):
674
for cn in if_tag.getElementsByTagName(u"method"):
675
if cn.getAttribute(u"name") == u"Get":
676
for arg in cn.getElementsByTagName(u"arg"):
677
if (arg.getAttribute(u"direction")
679
arg.setAttribute(u"name", u"value")
680
elif cn.getAttribute(u"name") == u"GetAll":
681
for arg in cn.getElementsByTagName(u"arg"):
682
if (arg.getAttribute(u"direction")
684
arg.setAttribute(u"name", u"props")
685
xmlstring = document.toxml(u"utf-8")
687
except (AttributeError, xml.dom.DOMException,
688
xml.parsers.expat.ExpatError), error:
689
logger.error(u"Failed to override Introspection method",
694
class ClientDBus(Client, DBusObjectWithProperties):
695
"""A Client class using D-Bus
698
dbus_object_path: dbus.ObjectPath
699
bus: dbus.SystemBus()
701
# dbus.service.Object doesn't use super(), so we can't either.
703
def __init__(self, bus = None, *args, **kwargs):
704
self._approvals_pending = 0
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)
715
def _get_approvals_pending(self):
716
return self._approvals_pending
717
def _set_approvals_pending(self, value):
718
old_value = self._approvals_pending
719
self._approvals_pending = value
721
if (hasattr(self, "dbus_object_path")
722
and bval is not bool(old_value)):
723
dbus_bool = dbus.Boolean(bval, variant_level=1)
724
self.PropertyChanged(dbus.String(u"approved_pending"),
727
approvals_pending = property(_get_approvals_pending,
728
_set_approvals_pending)
729
del _get_approvals_pending, _set_approvals_pending
732
def _datetime_to_dbus(dt, variant_level=0):
733
"""Convert a UTC datetime.datetime() to a D-Bus type."""
734
return dbus.String(dt.isoformat(),
735
variant_level=variant_level)
738
oldstate = getattr(self, u"enabled", False)
739
r = Client.enable(self)
740
if oldstate != self.enabled:
742
self.PropertyChanged(dbus.String(u"enabled"),
743
dbus.Boolean(True, variant_level=1))
744
self.PropertyChanged(
745
dbus.String(u"last_enabled"),
746
self._datetime_to_dbus(self.last_enabled,
750
def disable(self, quiet = False):
751
oldstate = getattr(self, u"enabled", False)
752
r = Client.disable(self, quiet=quiet)
753
if not quiet and oldstate != self.enabled:
755
self.PropertyChanged(dbus.String(u"enabled"),
756
dbus.Boolean(False, variant_level=1))
759
def __del__(self, *args, **kwargs):
761
self.remove_from_connection()
764
if hasattr(DBusObjectWithProperties, u"__del__"):
765
DBusObjectWithProperties.__del__(self, *args, **kwargs)
766
Client.__del__(self, *args, **kwargs)
768
def checker_callback(self, pid, condition, command,
770
self.checker_callback_tag = None
773
self.PropertyChanged(dbus.String(u"checker_running"),
774
dbus.Boolean(False, variant_level=1))
775
if os.WIFEXITED(condition):
776
exitstatus = os.WEXITSTATUS(condition)
778
self.CheckerCompleted(dbus.Int16(exitstatus),
779
dbus.Int64(condition),
780
dbus.String(command))
783
self.CheckerCompleted(dbus.Int16(-1),
784
dbus.Int64(condition),
785
dbus.String(command))
787
return Client.checker_callback(self, pid, condition, command,
790
def checked_ok(self, *args, **kwargs):
791
r = Client.checked_ok(self, *args, **kwargs)
793
self.PropertyChanged(
794
dbus.String(u"last_checked_ok"),
795
(self._datetime_to_dbus(self.last_checked_ok,
799
def start_checker(self, *args, **kwargs):
800
old_checker = self.checker
801
if self.checker is not None:
802
old_checker_pid = self.checker.pid
804
old_checker_pid = None
805
r = Client.start_checker(self, *args, **kwargs)
806
# Only if new checker process was started
807
if (self.checker is not None
808
and old_checker_pid != self.checker.pid):
810
self.CheckerStarted(self.current_checker_command)
811
self.PropertyChanged(
812
dbus.String(u"checker_running"),
813
dbus.Boolean(True, variant_level=1))
816
def stop_checker(self, *args, **kwargs):
817
old_checker = getattr(self, u"checker", None)
818
r = Client.stop_checker(self, *args, **kwargs)
819
if (old_checker is not None
820
and getattr(self, u"checker", None) is None):
821
self.PropertyChanged(dbus.String(u"checker_running"),
822
dbus.Boolean(False, variant_level=1))
825
def _reset_approved(self):
826
self._approved = None
829
def approve(self, value=True):
830
self.send_changedstate()
831
self._approved = value
832
gobject.timeout_add(self._timedelta_to_milliseconds(self.approved_duration),
833
self._reset_approved)
836
## D-Bus methods, signals & properties
837
_interface = u"se.bsnet.fukt.Mandos.Client"
841
# CheckerCompleted - signal
842
@dbus.service.signal(_interface, signature=u"nxs")
843
def CheckerCompleted(self, exitcode, waitstatus, command):
847
# CheckerStarted - signal
848
@dbus.service.signal(_interface, signature=u"s")
849
def CheckerStarted(self, command):
853
# PropertyChanged - signal
854
@dbus.service.signal(_interface, signature=u"sv")
855
def PropertyChanged(self, property, value):
860
@dbus.service.signal(_interface)
863
Is sent after a successful transfer of secret from the Mandos
864
server to mandos-client
869
@dbus.service.signal(_interface, signature=u"s")
870
def Rejected(self, reason):
874
# NeedApproval - signal
875
@dbus.service.signal(_interface, signature=u"db")
876
def NeedApproval(self, timeout, default):
883
@dbus.service.method(_interface, in_signature=u"b")
884
def Approve(self, value):
888
@dbus.service.method(_interface)
890
return self.checked_ok()
893
@dbus.service.method(_interface)
898
# StartChecker - method
899
@dbus.service.method(_interface)
900
def StartChecker(self):
905
@dbus.service.method(_interface)
910
# StopChecker - method
911
@dbus.service.method(_interface)
912
def StopChecker(self):
917
# approved_pending - property
918
@dbus_service_property(_interface, signature=u"b", access=u"read")
919
def approved_pending_dbus_property(self):
920
return dbus.Boolean(bool(self.approvals_pending))
922
# approved_by_default - property
923
@dbus_service_property(_interface, signature=u"b",
925
def approved_by_default_dbus_property(self):
926
return dbus.Boolean(self.approved_by_default)
928
# approved_delay - property
929
@dbus_service_property(_interface, signature=u"t",
931
def approved_delay_dbus_property(self):
932
return dbus.UInt64(self.approved_delay_milliseconds())
934
# approved_duration - property
935
@dbus_service_property(_interface, signature=u"t",
937
def approved_duration_dbus_property(self):
938
return dbus.UInt64(self._timedelta_to_milliseconds(
939
self.approved_duration))
942
@dbus_service_property(_interface, signature=u"s", access=u"read")
943
def name_dbus_property(self):
944
return dbus.String(self.name)
946
# fingerprint - property
947
@dbus_service_property(_interface, signature=u"s", access=u"read")
948
def fingerprint_dbus_property(self):
949
return dbus.String(self.fingerprint)
952
@dbus_service_property(_interface, signature=u"s",
954
def host_dbus_property(self, value=None):
955
if value is None: # get
956
return dbus.String(self.host)
959
self.PropertyChanged(dbus.String(u"host"),
960
dbus.String(value, variant_level=1))
963
@dbus_service_property(_interface, signature=u"s", access=u"read")
964
def created_dbus_property(self):
965
return dbus.String(self._datetime_to_dbus(self.created))
967
# last_enabled - property
968
@dbus_service_property(_interface, signature=u"s", access=u"read")
969
def last_enabled_dbus_property(self):
970
if self.last_enabled is None:
971
return dbus.String(u"")
972
return dbus.String(self._datetime_to_dbus(self.last_enabled))
975
@dbus_service_property(_interface, signature=u"b",
977
def enabled_dbus_property(self, value=None):
978
if value is None: # get
979
return dbus.Boolean(self.enabled)
985
# last_checked_ok - property
986
@dbus_service_property(_interface, signature=u"s",
988
def last_checked_ok_dbus_property(self, value=None):
989
if value is not None:
992
if self.last_checked_ok is None:
993
return dbus.String(u"")
994
return dbus.String(self._datetime_to_dbus(self
998
@dbus_service_property(_interface, signature=u"t",
1000
def timeout_dbus_property(self, value=None):
1001
if value is None: # get
1002
return dbus.UInt64(self.timeout_milliseconds())
1003
self.timeout = datetime.timedelta(0, 0, 0, value)
1005
self.PropertyChanged(dbus.String(u"timeout"),
1006
dbus.UInt64(value, variant_level=1))
1007
if getattr(self, u"disable_initiator_tag", None) is None:
1009
# Reschedule timeout
1010
gobject.source_remove(self.disable_initiator_tag)
1011
self.disable_initiator_tag = None
1012
time_to_die = (self.
1013
_timedelta_to_milliseconds((self
1018
if time_to_die <= 0:
1019
# The timeout has passed
1022
self.disable_initiator_tag = (gobject.timeout_add
1023
(time_to_die, self.disable))
1025
# interval - property
1026
@dbus_service_property(_interface, signature=u"t",
1027
access=u"readwrite")
1028
def interval_dbus_property(self, value=None):
1029
if value is None: # get
1030
return dbus.UInt64(self.interval_milliseconds())
1031
self.interval = datetime.timedelta(0, 0, 0, value)
1033
self.PropertyChanged(dbus.String(u"interval"),
1034
dbus.UInt64(value, variant_level=1))
1035
if getattr(self, u"checker_initiator_tag", None) is None:
1037
# Reschedule checker run
1038
gobject.source_remove(self.checker_initiator_tag)
1039
self.checker_initiator_tag = (gobject.timeout_add
1040
(value, self.start_checker))
1041
self.start_checker() # Start one now, too
1043
# checker - property
1044
@dbus_service_property(_interface, signature=u"s",
1045
access=u"readwrite")
1046
def checker_dbus_property(self, value=None):
1047
if value is None: # get
1048
return dbus.String(self.checker_command)
1049
self.checker_command = value
1051
self.PropertyChanged(dbus.String(u"checker"),
1052
dbus.String(self.checker_command,
1055
# checker_running - property
1056
@dbus_service_property(_interface, signature=u"b",
1057
access=u"readwrite")
1058
def checker_running_dbus_property(self, value=None):
1059
if value is None: # get
1060
return dbus.Boolean(self.checker is not None)
1062
self.start_checker()
1066
# object_path - property
1067
@dbus_service_property(_interface, signature=u"o", access=u"read")
1068
def object_path_dbus_property(self):
1069
return self.dbus_object_path # is already a dbus.ObjectPath
1072
@dbus_service_property(_interface, signature=u"ay",
1073
access=u"write", byte_arrays=True)
1074
def secret_dbus_property(self, value):
1075
self.secret = str(value)
1080
class ProxyClient(object):
1081
def __init__(self, child_pipe, fpr, address):
1082
self._pipe = child_pipe
1083
self._pipe.send(('init', fpr, address))
1084
if not self._pipe.recv():
1087
def __getattribute__(self, name):
1088
if(name == '_pipe'):
1089
return super(ProxyClient, self).__getattribute__(name)
1090
self._pipe.send(('getattr', name))
1091
data = self._pipe.recv()
1092
if data[0] == 'data':
1094
if data[0] == 'function':
1095
def func(*args, **kwargs):
1096
self._pipe.send(('funcall', name, args, kwargs))
1097
return self._pipe.recv()[1]
1100
def __setattr__(self, name, value):
1101
if(name == '_pipe'):
1102
return super(ProxyClient, self).__setattr__(name, value)
1103
self._pipe.send(('setattr', name, value))
1106
class ClientHandler(socketserver.BaseRequestHandler, object):
1107
"""A class to handle client connections.
1109
Instantiated once for each connection to handle it.
1110
Note: This will run in its own forked process."""
1113
with contextlib.closing(self.server.child_pipe) as child_pipe:
1114
logger.info(u"TCP connection from: %s",
1115
unicode(self.client_address))
1116
logger.debug(u"Pipe FD: %d",
1117
self.server.child_pipe.fileno())
1119
session = (gnutls.connection
1120
.ClientSession(self.request,
1122
.X509Credentials()))
1124
# Note: gnutls.connection.X509Credentials is really a
1125
# generic GnuTLS certificate credentials object so long as
1126
# no X.509 keys are added to it. Therefore, we can use it
1127
# here despite using OpenPGP certificates.
1129
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1130
# u"+AES-256-CBC", u"+SHA1",
1131
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1133
# Use a fallback default, since this MUST be set.
1134
priority = self.server.gnutls_priority
1135
if priority is None:
1136
priority = u"NORMAL"
1137
(gnutls.library.functions
1138
.gnutls_priority_set_direct(session._c_object,
1141
# Start communication using the Mandos protocol
1142
# Get protocol number
1143
line = self.request.makefile().readline()
1144
logger.debug(u"Protocol version: %r", line)
1146
if int(line.strip().split()[0]) > 1:
1148
except (ValueError, IndexError, RuntimeError), error:
1149
logger.error(u"Unknown protocol version: %s", error)
1152
# Start GnuTLS connection
1155
except gnutls.errors.GNUTLSError, error:
1156
logger.warning(u"Handshake failed: %s", error)
1157
# Do not run session.bye() here: the session is not
1158
# established. Just abandon the request.
1160
logger.debug(u"Handshake succeeded")
1162
approval_required = False
1165
fpr = self.fingerprint(self.peer_certificate
1167
except (TypeError, gnutls.errors.GNUTLSError), error:
1168
logger.warning(u"Bad certificate: %s", error)
1170
logger.debug(u"Fingerprint: %s", fpr)
1173
client = ProxyClient(child_pipe, fpr,
1174
self.client_address)
1178
if client.approved_delay:
1179
delay = client.approved_delay
1180
client.approvals_pending += 1
1181
approval_required = True
1184
if not client.enabled:
1185
logger.warning(u"Client %s is disabled",
1187
if self.server.use_dbus:
1189
client.Rejected("Disabled")
1192
if client._approved or not client.approved_delay:
1193
#We are approved or approval is disabled
1195
elif client._approved is None:
1196
logger.info(u"Client %s need approval",
1198
if self.server.use_dbus:
1200
client.NeedApproval(
1201
client.approved_delay_milliseconds(),
1202
client.approved_by_default)
1204
logger.warning(u"Client %s was not approved",
1206
if self.server.use_dbus:
1208
client.Rejected("Disapproved")
1211
#wait until timeout or approved
1212
#x = float(client._timedelta_to_milliseconds(delay))
1213
time = datetime.datetime.now()
1214
client.changedstate.acquire()
1215
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1216
client.changedstate.release()
1217
time2 = datetime.datetime.now()
1218
if (time2 - time) >= delay:
1219
if not client.approved_by_default:
1220
logger.warning("Client %s timed out while"
1221
" waiting for approval",
1223
if self.server.use_dbus:
1225
client.Rejected("Time out")
1230
delay -= time2 - time
1233
while sent_size < len(client.secret):
1235
sent = session.send(client.secret[sent_size:])
1236
except (gnutls.errors.GNUTLSError), error:
1237
logger.warning("gnutls send failed")
1239
logger.debug(u"Sent: %d, remaining: %d",
1240
sent, len(client.secret)
1241
- (sent_size + sent))
1244
logger.info(u"Sending secret to %s", client.name)
1245
# bump the timeout as if seen
1247
if self.server.use_dbus:
1252
if approval_required:
1253
client.approvals_pending -= 1
1256
except (gnutls.errors.GNUTLSError), error:
1257
logger.warning("gnutls bye failed")
1260
def peer_certificate(session):
1261
"Return the peer's OpenPGP certificate as a bytestring"
1262
# If not an OpenPGP certificate...
1263
if (gnutls.library.functions
1264
.gnutls_certificate_type_get(session._c_object)
1265
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1266
# ...do the normal thing
1267
return session.peer_certificate
1268
list_size = ctypes.c_uint(1)
1269
cert_list = (gnutls.library.functions
1270
.gnutls_certificate_get_peers
1271
(session._c_object, ctypes.byref(list_size)))
1272
if not bool(cert_list) and list_size.value != 0:
1273
raise gnutls.errors.GNUTLSError(u"error getting peer"
1275
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:
1278
return ctypes.string_at(cert.data, cert.size)
1281
def fingerprint(openpgp):
1282
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1283
# New GnuTLS "datum" with the OpenPGP public key
1284
datum = (gnutls.library.types
1285
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1288
ctypes.c_uint(len(openpgp))))
1289
# New empty GnuTLS certificate
1290
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1291
(gnutls.library.functions
1292
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1293
# Import the OpenPGP public key into the certificate
1294
(gnutls.library.functions
1295
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1296
gnutls.library.constants
1297
.GNUTLS_OPENPGP_FMT_RAW))
1298
# Verify the self signature in the key
1299
crtverify = ctypes.c_uint()
1300
(gnutls.library.functions
1301
.gnutls_openpgp_crt_verify_self(crt, 0,
1302
ctypes.byref(crtverify)))
1303
if crtverify.value != 0:
1304
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1305
raise (gnutls.errors.CertificateSecurityError
1307
# New buffer for the fingerprint
1308
buf = ctypes.create_string_buffer(20)
1309
buf_len = ctypes.c_size_t()
1310
# Get the fingerprint from the certificate into the buffer
1311
(gnutls.library.functions
1312
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1313
ctypes.byref(buf_len)))
1314
# Deinit the certificate
1315
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1316
# Convert the buffer to a Python bytestring
1317
fpr = ctypes.string_at(buf, buf_len.value)
1318
# Convert the bytestring to hexadecimal notation
1319
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1323
class MultiprocessingMixIn(object):
1324
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1325
def sub_process_main(self, request, address):
1327
self.finish_request(request, address)
1329
self.handle_error(request, address)
1330
self.close_request(request)
1332
def process_request(self, request, address):
1333
"""Start a new process to process the request."""
1334
multiprocessing.Process(target = self.sub_process_main,
1335
args = (request, address)).start()
1337
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1338
""" adds a pipe to the MixIn """
1339
def process_request(self, request, client_address):
1340
"""Overrides and wraps the original process_request().
1342
This function creates a new pipe in self.pipe
1344
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1346
super(MultiprocessingMixInWithPipe,
1347
self).process_request(request, client_address)
1348
self.child_pipe.close()
1349
self.add_pipe(parent_pipe)
1351
def add_pipe(self, parent_pipe):
1352
"""Dummy function; override as necessary"""
1355
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1356
socketserver.TCPServer, object):
1357
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1360
enabled: Boolean; whether this server is activated yet
1361
interface: None or a network interface name (string)
1362
use_ipv6: Boolean; to use IPv6 or not
1364
def __init__(self, server_address, RequestHandlerClass,
1365
interface=None, use_ipv6=True):
1366
self.interface = interface
1368
self.address_family = socket.AF_INET6
1369
socketserver.TCPServer.__init__(self, server_address,
1370
RequestHandlerClass)
1371
def server_bind(self):
1372
"""This overrides the normal server_bind() function
1373
to bind to an interface if one was specified, and also NOT to
1374
bind to an address or port if they were not specified."""
1375
if self.interface is not None:
1376
if SO_BINDTODEVICE is None:
1377
logger.error(u"SO_BINDTODEVICE does not exist;"
1378
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
1382
104
self.socket.setsockopt(socket.SOL_SOCKET,
105
socket.SO_BINDTODEVICE,
106
self.options.interface)
1386
107
except socket.error, error:
1387
108
if error[0] == errno.EPERM:
1388
logger.error(u"No permission to"
1389
u" bind to interface %s",
1391
elif error[0] == errno.ENOPROTOOPT:
1392
logger.error(u"SO_BINDTODEVICE not available;"
1393
u" cannot bind to interface %s",
109
print "Warning: No permission to bind to interface", \
110
self.options.interface
1397
# Only bind(2) the socket if we really need to.
1398
if self.server_address[0] or self.server_address[1]:
1399
if not self.server_address[0]:
1400
if self.address_family == socket.AF_INET6:
1401
any_address = u"::" # in6addr_any
1403
any_address = socket.INADDR_ANY
1404
self.server_address = (any_address,
1405
self.server_address[1])
1406
elif not self.server_address[1]:
1407
self.server_address = (self.server_address[0],
1409
# if self.interface:
1410
# self.server_address = (self.server_address[0],
1415
return socketserver.TCPServer.server_bind(self)
1418
class MandosServer(IPv6_TCPServer):
1422
clients: set of Client objects
1423
gnutls_priority GnuTLS priority string
1424
use_dbus: Boolean; to emit D-Bus signals or not
1426
Assumes a gobject.MainLoop event loop.
1428
def __init__(self, server_address, RequestHandlerClass,
1429
interface=None, use_ipv6=True, clients=None,
1430
gnutls_priority=None, use_dbus=True):
1431
self.enabled = False
1432
self.clients = clients
1433
if self.clients is None:
1434
self.clients = set()
1435
self.use_dbus = use_dbus
1436
self.gnutls_priority = gnutls_priority
1437
IPv6_TCPServer.__init__(self, server_address,
1438
RequestHandlerClass,
1439
interface = interface,
1440
use_ipv6 = use_ipv6)
1441
def server_activate(self):
1443
return socketserver.TCPServer.server_activate(self)
1446
def add_pipe(self, parent_pipe):
1447
# Call "handle_ipc" for both data and EOF events
1448
gobject.io_add_watch(parent_pipe.fileno(),
1449
gobject.IO_IN | gobject.IO_HUP,
1450
functools.partial(self.handle_ipc,
1451
parent_pipe = parent_pipe))
1453
def handle_ipc(self, source, condition, parent_pipe=None,
1454
client_object=None):
1456
gobject.IO_IN: u"IN", # There is data to read.
1457
gobject.IO_OUT: u"OUT", # Data can be written (without
1459
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1460
gobject.IO_ERR: u"ERR", # Error condition.
1461
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1462
# broken, usually for pipes and
1465
conditions_string = ' | '.join(name
1467
condition_names.iteritems()
1468
if cond & condition)
1469
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1472
# error or the other end of multiprocessing.Pipe has closed
1473
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1476
# Read a request from the child
1477
request = parent_pipe.recv()
1478
logger.debug(u"IPC request: %s", repr(request))
1479
command = request[0]
1481
if command == 'init':
1483
address = request[2]
1485
for c in self.clients:
1486
if c.fingerprint == fpr:
1490
logger.warning(u"Client not found for fingerprint: %s, ad"
1491
u"dress: %s", fpr, address)
1494
mandos_dbus_service.ClientNotFound(fpr, address)
1495
parent_pipe.send(False)
1498
gobject.io_add_watch(parent_pipe.fileno(),
1499
gobject.IO_IN | gobject.IO_HUP,
1500
functools.partial(self.handle_ipc,
1501
parent_pipe = parent_pipe,
1502
client_object = client))
1503
parent_pipe.send(True)
1504
# remove the old hook in favor of the new above hook on same fileno
1506
if command == 'funcall':
1507
funcname = request[1]
1511
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1513
if command == 'getattr':
1514
attrname = request[1]
1515
if callable(client_object.__getattribute__(attrname)):
1516
parent_pipe.send(('function',))
1518
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1520
if command == 'setattr':
1521
attrname = request[1]
1523
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
1528
177
def string_to_delta(interval):
1529
178
"""Parse a string and return a datetime.timedelta
1531
>>> string_to_delta(u'7d')
180
>>> string_to_delta('7d')
1532
181
datetime.timedelta(7)
1533
>>> string_to_delta(u'60s')
182
>>> string_to_delta('60s')
1534
183
datetime.timedelta(0, 60)
1535
>>> string_to_delta(u'60m')
184
>>> string_to_delta('60m')
1536
185
datetime.timedelta(0, 3600)
1537
>>> string_to_delta(u'24h')
186
>>> string_to_delta('24h')
1538
187
datetime.timedelta(1)
1539
188
>>> string_to_delta(u'1w')
1540
189
datetime.timedelta(7)
1541
>>> string_to_delta(u'5m 30s')
1542
datetime.timedelta(0, 330)
1544
timevalue = datetime.timedelta(0)
1545
for s in interval.split():
1547
suffix = unicode(s[-1])
1550
delta = datetime.timedelta(value)
1551
elif suffix == u"s":
1552
delta = datetime.timedelta(0, value)
1553
elif suffix == u"m":
1554
delta = datetime.timedelta(0, 0, 0, 0, value)
1555
elif suffix == u"h":
1556
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1557
elif suffix == u"w":
1558
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1560
raise ValueError(u"Unknown suffix %r" % suffix)
1561
except (ValueError, IndexError), e:
1562
raise ValueError(e.message)
1567
def if_nametoindex(interface):
1568
"""Call the C function if_nametoindex(), or equivalent
1570
Note: This function cannot accept a unicode string."""
1571
global if_nametoindex
1573
if_nametoindex = (ctypes.cdll.LoadLibrary
1574
(ctypes.util.find_library(u"c"))
1576
except (OSError, AttributeError):
1577
logger.warning(u"Doing if_nametoindex the hard way")
1578
def if_nametoindex(interface):
1579
"Get an interface index the hard way, i.e. using fcntl()"
1580
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1581
with contextlib.closing(socket.socket()) as s:
1582
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1583
struct.pack(str(u"16s16x"),
1585
interface_index = struct.unpack(str(u"I"),
1587
return interface_index
1588
return if_nametoindex(interface)
1591
def daemon(nochdir = False, noclose = False):
1592
"""See daemon(3). Standard BSD Unix function.
1594
This should really exist as os.daemon, but it doesn't (yet)."""
1603
# Close all standard open file descriptors
1604
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1605
if not stat.S_ISCHR(os.fstat(null).st_mode):
1606
raise OSError(errno.ENODEV,
1607
u"%s not a character device"
1609
os.dup2(null, sys.stdin.fileno())
1610
os.dup2(null, sys.stdout.fileno())
1611
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):
1618
##################################################################
1619
# Parsing of options, both command line and config file
1621
parser = optparse.OptionParser(version = "%%prog %s" % version)
1622
parser.add_option("-i", u"--interface", type=u"string",
1623
metavar="IF", help=u"Bind to interface IF")
1624
parser.add_option("-a", u"--address", type=u"string",
1625
help=u"Address to listen for requests on")
1626
parser.add_option("-p", u"--port", type=u"int",
1627
help=u"Port number to receive requests on")
1628
parser.add_option("--check", action=u"store_true",
1629
help=u"Run self-test")
1630
parser.add_option("--debug", action=u"store_true",
1631
help=u"Debug mode; run in foreground and log to"
1633
parser.add_option("--debuglevel", type=u"string", metavar="Level",
1634
help=u"Debug level for stdout output")
1635
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1636
u" priority string (see GnuTLS documentation)")
1637
parser.add_option("--servicename", type=u"string",
1638
metavar=u"NAME", help=u"Zeroconf service name")
1639
parser.add_option("--configdir", type=u"string",
1640
default=u"/etc/mandos", metavar=u"DIR",
1641
help=u"Directory to search for configuration"
1643
parser.add_option("--no-dbus", action=u"store_false",
1644
dest=u"use_dbus", help=u"Do not provide D-Bus"
1645
u" system bus interface")
1646
parser.add_option("--no-ipv6", action=u"store_false",
1647
dest=u"use_ipv6", help=u"Do not use IPv6")
1648
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()
1650
242
if options.check:
1652
244
doctest.testmod()
1655
# Default values for config file for server-global settings
1656
server_defaults = { u"interface": u"",
1661
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1662
u"servicename": u"Mandos",
1663
u"use_dbus": u"True",
1664
u"use_ipv6": u"True",
1668
# Parse config file for server-global settings
1669
server_config = configparser.SafeConfigParser(server_defaults)
1671
server_config.read(os.path.join(options.configdir,
1673
# Convert the SafeConfigParser object to a dict
1674
server_settings = server_config.defaults()
1675
# Use the appropriate methods on the non-string config options
1676
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1677
server_settings[option] = server_config.getboolean(u"DEFAULT",
1679
if server_settings["port"]:
1680
server_settings["port"] = server_config.getint(u"DEFAULT",
1684
# Override the settings from the config file with command line
1686
for option in (u"interface", u"address", u"port", u"debug",
1687
u"priority", u"servicename", u"configdir",
1688
u"use_dbus", u"use_ipv6", u"debuglevel"):
1689
value = getattr(options, option)
1690
if value is not None:
1691
server_settings[option] = value
1693
# Force all strings to be unicode
1694
for option in server_settings.keys():
1695
if type(server_settings[option]) is str:
1696
server_settings[option] = unicode(server_settings[option])
1697
# Now we have our good server settings in "server_settings"
1699
##################################################################
1702
debug = server_settings[u"debug"]
1703
debuglevel = server_settings[u"debuglevel"]
1704
use_dbus = server_settings[u"use_dbus"]
1705
use_ipv6 = server_settings[u"use_ipv6"]
1707
if server_settings[u"servicename"] != u"Mandos":
1708
syslogger.setFormatter(logging.Formatter
1709
(u'Mandos (%s) [%%(process)d]:'
1710
u' %%(levelname)s: %%(message)s'
1711
% server_settings[u"servicename"]))
1713
# Parse config file with clients
1714
client_defaults = { u"timeout": u"1h",
1716
u"checker": u"fping -q -- %%(host)s",
1718
u"approved_delay": u"0s",
1719
u"approved_duration": u"1s",
1721
client_config = configparser.SafeConfigParser(client_defaults)
1722
client_config.read(os.path.join(server_settings[u"configdir"],
1725
global mandos_dbus_service
1726
mandos_dbus_service = None
1728
tcp_server = MandosServer((server_settings[u"address"],
1729
server_settings[u"port"]),
1731
interface=server_settings[u"interface"],
1734
server_settings[u"priority"],
1736
pidfilename = u"/var/run/mandos.pid"
1738
pidfile = open(pidfilename, u"w")
1740
logger.error(u"Could not open file %r", pidfilename)
1743
uid = pwd.getpwnam(u"_mandos").pw_uid
1744
gid = pwd.getpwnam(u"_mandos").pw_gid
1747
uid = pwd.getpwnam(u"mandos").pw_uid
1748
gid = pwd.getpwnam(u"mandos").pw_gid
1751
uid = pwd.getpwnam(u"nobody").pw_uid
1752
gid = pwd.getpwnam(u"nobody").pw_gid
1759
except OSError, error:
1760
if error[0] != errno.EPERM:
1763
# Enable all possible GnuTLS debugging
1766
if not debug and not debuglevel:
1767
syslogger.setLevel(logging.WARNING)
1768
console.setLevel(logging.WARNING)
1770
level = getattr(logging, debuglevel.upper())
1771
syslogger.setLevel(level)
1772
console.setLevel(level)
1775
# "Use a log level over 10 to enable all debugging options."
1777
gnutls.library.functions.gnutls_global_set_log_level(11)
1779
@gnutls.library.types.gnutls_log_func
1780
def debug_gnutls(level, string):
1781
logger.debug(u"GnuTLS: %s", string[:-1])
1783
(gnutls.library.functions
1784
.gnutls_global_set_log_function(debug_gnutls))
1786
# Redirect stdin so all checkers get /dev/null
1787
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1788
os.dup2(null, sys.stdin.fileno())
1792
# No console logging
1793
logger.removeHandler(console)
1797
# From the Avahi example code
1798
DBusGMainLoop(set_as_default=True )
1799
main_loop = gobject.MainLoop()
1800
bus = dbus.SystemBus()
1801
# End of Avahi example code
1804
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1805
bus, do_not_queue=True)
1806
except dbus.exceptions.NameExistsException, e:
1807
logger.error(unicode(e) + u", disabling D-Bus")
1809
server_settings[u"use_dbus"] = False
1810
tcp_server.use_dbus = False
1811
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1812
service = AvahiService(name = server_settings[u"servicename"],
1813
servicetype = u"_mandos._tcp",
1814
protocol = protocol, bus = bus)
1815
if server_settings["interface"]:
1816
service.interface = (if_nametoindex
1817
(str(server_settings[u"interface"])))
1820
# Close all input and output, do double fork, etc.
1823
global multiprocessing_manager
1824
multiprocessing_manager = multiprocessing.Manager()
1826
client_class = Client
1828
client_class = functools.partial(ClientDBus, bus = bus)
1829
def client_config_items(config, section):
1830
special_settings = {
1831
"approved_by_default":
1832
lambda: config.getboolean(section,
1833
"approved_by_default"),
1835
for name, value in config.items(section):
1837
yield (name, special_settings[name]())
1841
tcp_server.clients.update(set(
1842
client_class(name = section,
1843
config= dict(client_config_items(
1844
client_config, section)))
1845
for section in client_config.sections()))
1846
if not tcp_server.clients:
1847
logger.warning(u"No clients defined")
1852
pidfile.write(str(pid) + "\n")
1855
logger.error(u"Could not write to file %r with PID %d",
1858
# "pidfile" was never created
1863
signal.signal(signal.SIGINT, signal.SIG_IGN)
1864
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1865
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1868
class MandosDBusService(dbus.service.Object):
1869
"""A D-Bus proxy object"""
1871
dbus.service.Object.__init__(self, bus, u"/")
1872
_interface = u"se.bsnet.fukt.Mandos"
1874
@dbus.service.signal(_interface, signature=u"o")
1875
def ClientAdded(self, objpath):
1879
@dbus.service.signal(_interface, signature=u"ss")
1880
def ClientNotFound(self, fingerprint, address):
1884
@dbus.service.signal(_interface, signature=u"os")
1885
def ClientRemoved(self, objpath, name):
1889
@dbus.service.method(_interface, out_signature=u"ao")
1890
def GetAllClients(self):
1892
return dbus.Array(c.dbus_object_path
1893
for c in tcp_server.clients)
1895
@dbus.service.method(_interface,
1896
out_signature=u"a{oa{sv}}")
1897
def GetAllClientsWithProperties(self):
1899
return dbus.Dictionary(
1900
((c.dbus_object_path, c.GetAll(u""))
1901
for c in tcp_server.clients),
1902
signature=u"oa{sv}")
1904
@dbus.service.method(_interface, in_signature=u"o")
1905
def RemoveClient(self, object_path):
1907
for c in tcp_server.clients:
1908
if c.dbus_object_path == object_path:
1909
tcp_server.clients.remove(c)
1910
c.remove_from_connection()
1911
# Don't signal anything except ClientRemoved
1912
c.disable(quiet=True)
1914
self.ClientRemoved(object_path, c.name)
1916
raise KeyError(object_path)
1920
mandos_dbus_service = MandosDBusService()
1923
"Cleanup function; run on exit"
1926
while tcp_server.clients:
1927
client = tcp_server.clients.pop()
1929
client.remove_from_connection()
1930
client.disable_hook = None
1931
# Don't signal anything except ClientRemoved
1932
client.disable(quiet=True)
1935
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1938
atexit.register(cleanup)
1940
for client in tcp_server.clients:
1943
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1947
tcp_server.server_activate()
1949
# Find out what port we got
1950
service.port = tcp_server.socket.getsockname()[1]
1952
logger.info(u"Now listening on address %r, port %d,"
1953
" flowinfo %d, scope_id %d"
1954
% tcp_server.socket.getsockname())
1956
logger.info(u"Now listening on address %r, port %d"
1957
% tcp_server.socket.getsockname())
1959
#service.interface = tcp_server.socket.getsockname()[3]
1962
# From the Avahi example code
1965
except dbus.exceptions.DBusException, error:
1966
logger.critical(u"DBusException: %s", error)
1969
# End of Avahi example code
1971
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1972
lambda *args, **kwargs:
1973
(tcp_server.handle_request
1974
(*args[2:], **kwargs) or True))
1976
logger.debug(u"Starting main loop")
1978
except AvahiError, error:
1979
logger.critical(u"AvahiError: %s", error)
1982
except KeyboardInterrupt:
1985
logger.debug(u"Server received KeyboardInterrupt")
1986
logger.debug(u"Server exiting")
1987
# Must run before the D-Bus bus name gets deregistered
1990
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__":