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- Committer: Björn Påhlsson
- Date: 2008-08-09 04:42:39 UTC
- mto: (24.1.154 mandos) (237.4.3 mandos-release)
- mto: This revision was merged to the branch mainline in revision 53.
- Revision ID: belorn@braxen-20080809044239-a1ub3rvi88ydwvla
tally count of used symbols
return codes from functions checked.
return codes from functions checked.
- files added:
- network-protocol.txt
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugin-runner.c => mandos-client.c
- plugin-runner.xml => mandos-client.xml
- plugins.d/mandos-client.c => plugins.d/password-request.c
- plugins.d/mandos-client.xml => plugins.d/password-request.xml
- files modified:
- Makefile
added
removed
mandos
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# and some lines in "main".
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#
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# Everything else is
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# Copyright © 2008,2009 Teddy Hogeborn
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# Copyright © 2008,2009 Björn Påhlsson
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# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
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#
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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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# GNU General Public License for more details.
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#
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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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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# Contact the authors at <mandos@fukt.bsnet.se>.
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#
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from __future__ import division, with_statement, absolute_import
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from __future__ import division
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import SocketServer
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import socket
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import optparse
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import select
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from optparse import OptionParser
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import datetime
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import errno
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import gnutls.crypto
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import stat
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import logging
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import logging.handlers
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import pwd
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from contextlib import closing
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import dbus
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import dbus.service
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import gobject
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import avahi
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from dbus.mainloop.glib import DBusGMainLoop
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import ctypes
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import ctypes.util
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63
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version = "1.0.5"
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64
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logger = logging.Logger('mandos')
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syslogger = (logging.handlers.SysLogHandler
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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = "/dev/log"))
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syslogger.setFormatter(logging.Formatter
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('Mandos: %(levelname)s: %(message)s'))
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syslogger = logging.handlers.SysLogHandler\
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(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
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syslogger.setFormatter(logging.Formatter\
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('%(levelname)s: %(message)s'))
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logger.addHandler(syslogger)
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del syslogger
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console = logging.StreamHandler()
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console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
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' %(message)s'))
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logger.addHandler(console)
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73
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class AvahiError(Exception):
85
def __init__(self, value, *args, **kwargs):
75
def __init__(self, value):
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self.value = value
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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))
77
def __str__(self):
78
return repr(self.value)
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class AvahiServiceError(AvahiError):
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pass
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a sensible number of times
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"""
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def __init__(self, interface = avahi.IF_UNSPEC, name = None,
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servicetype = None, port = None, TXT = None,
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domain = "", host = "", max_renames = 32768):
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type = None, port = None, TXT = None, domain = "",
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host = "", max_renames = 12):
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self.interface = interface
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self.name = name
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self.type = servicetype
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self.type = type
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self.port = port
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self.TXT = TXT if TXT is not None else []
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if TXT is None:
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self.TXT = []
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else:
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self.TXT = TXT
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self.domain = domain
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self.host = host
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self.rename_count = 0
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self.max_renames = max_renames
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def rename(self):
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"""Derived from the Avahi example code"""
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if self.rename_count >= self.max_renames:
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logger.critical(u"No suitable Zeroconf service name found"
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u" after %i retries, exiting.",
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self.rename_count)
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raise AvahiServiceError(u"Too many renames")
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self.name = server.GetAlternativeServiceName(self.name)
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logger.info(u"Changing Zeroconf service name to %r ...",
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str(self.name))
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syslogger.setFormatter(logging.Formatter
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('Mandos (%s): %%(levelname)s:'
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' %%(message)s' % self.name))
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logger.critical(u"No suitable service name found after %i"
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u" retries, exiting.", rename_count)
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raise AvahiServiceError("Too many renames")
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name = server.GetAlternativeServiceName(name)
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logger.error(u"Changing name to %r ...", name)
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self.remove()
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self.add()
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self.rename_count += 1
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"""Derived from the Avahi example code"""
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global group
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if group is None:
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group = dbus.Interface(bus.get_object
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(avahi.DBUS_NAME,
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group = dbus.Interface\
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(bus.get_object(avahi.DBUS_NAME,
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server.EntryGroupNew()),
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avahi.DBUS_INTERFACE_ENTRY_GROUP)
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avahi.DBUS_INTERFACE_ENTRY_GROUP)
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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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logger.debug(u"Adding service '%s' of type '%s' ...",
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service.name, service.type)
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group.AddService(
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self.interface, # interface
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# End of Avahi example code
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def _datetime_to_dbus(dt, variant_level=0):
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"""Convert a UTC datetime.datetime() to a D-Bus type."""
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return dbus.String(dt.isoformat(), variant_level=variant_level)
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class Client(dbus.service.Object):
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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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Attributes:
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name: string; from the config file, used in log messages and
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D-Bus identifiers
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name: string; from the config file, used in log messages
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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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enabled: bool()
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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 invalid
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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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secret: bytestring; sent verbatim (over TLS) to client
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fqdn: string (FQDN); available for use by the checker command
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created: datetime.datetime(); object creation, not client host
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last_checked_ok: datetime.datetime() or None if not yet checked OK
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timeout: datetime.timedelta(); How long from last_checked_ok
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until this client is invalid
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interval: datetime.timedelta(); How often to start a new checker
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stop_hook: If set, called by stop() as stop_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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stop_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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use_dbus: bool(); Whether to provide D-Bus interface and signals
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dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
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Private attibutes:
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_timeout: Real variable for 'timeout'
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_interval: Real variable for 'interval'
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_timeout_milliseconds: Used when calling gobject.timeout_add()
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_interval_milliseconds: - '' -
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"""
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def timeout_milliseconds(self):
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"Return the 'timeout' attribute in milliseconds"
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return ((self.timeout.days * 24 * 60 * 60 * 1000)
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+ (self.timeout.seconds * 1000)
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+ (self.timeout.microseconds // 1000))
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def interval_milliseconds(self):
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"Return the 'interval' attribute in milliseconds"
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return ((self.interval.days * 24 * 60 * 60 * 1000)
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+ (self.interval.seconds * 1000)
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+ (self.interval.microseconds // 1000))
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def __init__(self, name = None, disable_hook=None, config=None,
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use_dbus=True):
189
def _set_timeout(self, timeout):
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"Setter function for 'timeout' attribute"
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self._timeout = timeout
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self._timeout_milliseconds = ((self.timeout.days
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* 24 * 60 * 60 * 1000)
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+ (self.timeout.seconds * 1000)
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+ (self.timeout.microseconds
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// 1000))
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timeout = property(lambda self: self._timeout,
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_set_timeout)
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del _set_timeout
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def _set_interval(self, interval):
201
"Setter function for 'interval' attribute"
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self._interval = interval
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self._interval_milliseconds = ((self.interval.days
204
* 24 * 60 * 60 * 1000)
205
+ (self.interval.seconds
206
* 1000)
207
+ (self.interval.microseconds
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// 1000))
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interval = property(lambda self: self._interval,
210
_set_interval)
211
del _set_interval
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def __init__(self, name = None, stop_hook=None, config={}):
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"""Note: the 'checker' key in 'config' sets the
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'checker_command' attribute and *not* the 'checker'
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attribute."""
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self.name = name
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if config is None:
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config = {}
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logger.debug(u"Creating client %r", self.name)
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self.use_dbus = use_dbus
230
if self.use_dbus:
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self.dbus_object_path = (dbus.ObjectPath
232
("/Mandos/clients/"
233
+ self.name.replace(".", "_")))
234
dbus.service.Object.__init__(self, bus,
235
self.dbus_object_path)
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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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# function
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self.fingerprint = (config["fingerprint"].upper()
240
.replace(u" ", u""))
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self.fingerprint = config["fingerprint"].upper()\
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.replace(u" ", u"")
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logger.debug(u" Fingerprint: %s", self.fingerprint)
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if "secret" in config:
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self.secret = config["secret"].decode(u"base64")
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elif "secfile" in config:
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with closing(open(os.path.expanduser
246
(os.path.expandvars
247
(config["secfile"])))) as secfile:
248
self.secret = secfile.read()
227
sf = open(config["secfile"])
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self.secret = sf.read()
229
sf.close()
249
230
else:
250
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raise TypeError(u"No secret or secfile for client %s"
251
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% self.name)
252
self.host = config.get("host", "")
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self.created = datetime.datetime.utcnow()
254
self.enabled = False
255
self.last_enabled = None
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self.fqdn = config.get("fqdn", "")
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self.created = datetime.datetime.now()
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self.last_checked_ok = None
257
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self.timeout = string_to_delta(config["timeout"])
258
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self.interval = string_to_delta(config["interval"])
259
self.disable_hook = disable_hook
238
self.stop_hook = stop_hook
260
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self.checker = None
261
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self.checker_initiator_tag = None
262
self.disable_initiator_tag = None
241
self.stop_initiator_tag = None
263
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self.checker_callback_tag = None
264
self.checker_command = config["checker"]
265
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def enable(self):
243
self.check_command = config["checker"]
244
def start(self):
267
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"""Start this client's checker and timeout hooks"""
268
self.last_enabled = datetime.datetime.utcnow()
269
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# Schedule a new checker to be started an 'interval' from now,
270
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# and every interval from then on.
271
self.checker_initiator_tag = (gobject.timeout_add
272
(self.interval_milliseconds(),
273
self.start_checker))
248
self.checker_initiator_tag = gobject.timeout_add\
249
(self._interval_milliseconds,
250
self.start_checker)
274
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# Also start a new checker *right now*.
275
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self.start_checker()
276
# Schedule a disable() when 'timeout' has passed
277
self.disable_initiator_tag = (gobject.timeout_add
278
(self.timeout_milliseconds(),
279
self.disable))
280
self.enabled = True
281
if self.use_dbus:
282
# Emit D-Bus signals
283
self.PropertyChanged(dbus.String(u"enabled"),
284
dbus.Boolean(True, variant_level=1))
285
self.PropertyChanged(dbus.String(u"last_enabled"),
286
(_datetime_to_dbus(self.last_enabled,
287
variant_level=1)))
288
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def disable(self):
290
"""Disable this client."""
291
if not getattr(self, "enabled", False):
253
# Schedule a stop() when 'timeout' has passed
254
self.stop_initiator_tag = gobject.timeout_add\
255
(self._timeout_milliseconds,
256
self.stop)
257
def stop(self):
258
"""Stop this client.
259
The possibility that a client might be restarted is left open,
260
but not currently used."""
261
# If this client doesn't have a secret, it is already stopped.
262
if self.secret:
263
logger.info(u"Stopping client %s", self.name)
264
self.secret = None
265
else:
292
266
return False
293
logger.info(u"Disabling client %s", self.name)
294
if getattr(self, "disable_initiator_tag", False):
295
gobject.source_remove(self.disable_initiator_tag)
296
self.disable_initiator_tag = None
267
if getattr(self, "stop_initiator_tag", False):
268
gobject.source_remove(self.stop_initiator_tag)
269
self.stop_initiator_tag = None
297
270
if getattr(self, "checker_initiator_tag", False):
298
271
gobject.source_remove(self.checker_initiator_tag)
299
272
self.checker_initiator_tag = None
300
273
self.stop_checker()
301
if self.disable_hook:
302
self.disable_hook(self)
303
self.enabled = False
304
if self.use_dbus:
305
# Emit D-Bus signal
306
self.PropertyChanged(dbus.String(u"enabled"),
307
dbus.Boolean(False, variant_level=1))
274
if self.stop_hook:
275
self.stop_hook(self)
308
276
# Do not run this again if called by a gobject.timeout_add
309
277
return False
310
311
278
def __del__(self):
312
self.disable_hook = None
313
self.disable()
314
315
def checker_callback(self, pid, condition, command):
279
self.stop_hook = None
280
self.stop()
281
def checker_callback(self, pid, condition):
316
282
"""The checker has completed, so take appropriate actions."""
283
now = datetime.datetime.now()
317
284
self.checker_callback_tag = None
318
285
self.checker = None
319
if self.use_dbus:
320
# Emit D-Bus signal
321
self.PropertyChanged(dbus.String(u"checker_running"),
322
dbus.Boolean(False, variant_level=1))
323
if (os.WIFEXITED(condition)
324
and (os.WEXITSTATUS(condition) == 0)):
286
if os.WIFEXITED(condition) \
287
and (os.WEXITSTATUS(condition) == 0):
325
288
logger.info(u"Checker for %(name)s succeeded",
326
289
vars(self))
327
if self.use_dbus:
328
# Emit D-Bus signal
329
self.CheckerCompleted(dbus.Boolean(True),
330
dbus.UInt16(condition),
331
dbus.String(command))
332
self.bump_timeout()
290
self.last_checked_ok = now
291
gobject.source_remove(self.stop_initiator_tag)
292
self.stop_initiator_tag = gobject.timeout_add\
293
(self._timeout_milliseconds,
294
self.stop)
333
295
elif not os.WIFEXITED(condition):
334
296
logger.warning(u"Checker for %(name)s crashed?",
335
297
vars(self))
336
if self.use_dbus:
337
# Emit D-Bus signal
338
self.CheckerCompleted(dbus.Boolean(False),
339
dbus.UInt16(condition),
340
dbus.String(command))
341
298
else:
342
299
logger.info(u"Checker for %(name)s failed",
343
300
vars(self))
344
if self.use_dbus:
345
# Emit D-Bus signal
346
self.CheckerCompleted(dbus.Boolean(False),
347
dbus.UInt16(condition),
348
dbus.String(command))
349
350
def bump_timeout(self):
351
"""Bump up the timeout for this client.
352
This should only be called when the client has been seen,
353
alive and well.
354
"""
355
self.last_checked_ok = datetime.datetime.utcnow()
356
gobject.source_remove(self.disable_initiator_tag)
357
self.disable_initiator_tag = (gobject.timeout_add
358
(self.timeout_milliseconds(),
359
self.disable))
360
if self.use_dbus:
361
# Emit D-Bus signal
362
self.PropertyChanged(
363
dbus.String(u"last_checked_ok"),
364
(_datetime_to_dbus(self.last_checked_ok,
365
variant_level=1)))
366
367
301
def start_checker(self):
368
302
"""Start a new checker subprocess if one is not running.
369
303
If a checker already exists, leave it running and do
378
312
# is as it should be.
379
313
if self.checker is None:
380
314
try:
381
# In case checker_command has exactly one % operator
382
command = self.checker_command % self.host
315
# In case check_command has exactly one % operator
316
command = self.check_command % self.fqdn
383
317
except TypeError:
384
318
# Escape attributes for the shell
385
319
escaped_attrs = dict((key, re.escape(str(val)))
386
320
for key, val in
387
321
vars(self).iteritems())
388
322
try:
389
command = self.checker_command % escaped_attrs
323
command = self.check_command % escaped_attrs
390
324
except TypeError, error:
391
325
logger.error(u'Could not format string "%s":'
392
u' %s', self.checker_command, error)
326
u' %s', self.check_command, error)
393
327
return True # Try again later
394
328
try:
395
329
logger.info(u"Starting checker %r for %s",
396
330
command, self.name)
397
# We don't need to redirect stdout and stderr, since
398
# in normal mode, that is already done by daemon(),
399
# and in debug mode we don't want to. (Stdin is
400
# always replaced by /dev/null.)
401
331
self.checker = subprocess.Popen(command,
402
332
close_fds=True,
403
333
shell=True, cwd="/")
404
if self.use_dbus:
405
# Emit D-Bus signal
406
self.CheckerStarted(command)
407
self.PropertyChanged(
408
dbus.String("checker_running"),
409
dbus.Boolean(True, variant_level=1))
410
self.checker_callback_tag = (gobject.child_watch_add
411
(self.checker.pid,
412
self.checker_callback,
413
data=command))
414
except OSError, error:
334
self.checker_callback_tag = gobject.child_watch_add\
335
(self.checker.pid,
336
self.checker_callback)
337
except subprocess.OSError, error:
415
338
logger.error(u"Failed to start subprocess: %s",
416
339
error)
417
340
# Re-run this periodically if run by gobject.timeout_add
418
341
return True
419
420
342
def stop_checker(self):
421
343
"""Force the checker process, if any, to stop."""
422
344
if self.checker_callback_tag:
424
346
self.checker_callback_tag = None
425
347
if getattr(self, "checker", None) is None:
426
348
return
427
logger.debug(u"Stopping checker for %(name)s", vars(self))
349
logger.debug("Stopping checker for %(name)s", vars(self))
428
350
try:
429
351
os.kill(self.checker.pid, signal.SIGTERM)
430
352
#os.sleep(0.5)
434
356
if error.errno != errno.ESRCH: # No such process
435
357
raise
436
358
self.checker = None
437
if self.use_dbus:
438
self.PropertyChanged(dbus.String(u"checker_running"),
439
dbus.Boolean(False, variant_level=1))
440
441
359
def still_valid(self):
442
360
"""Has the timeout not yet passed for this client?"""
443
if not getattr(self, "enabled", False):
444
return False
445
now = datetime.datetime.utcnow()
361
now = datetime.datetime.now()
446
362
if self.last_checked_ok is None:
447
363
return now < (self.created + self.timeout)
448
364
else:
449
365
return now < (self.last_checked_ok + self.timeout)
450
451
## D-Bus methods & signals
452
_interface = u"org.mandos_system.Mandos.Client"
453
454
# BumpTimeout - method
455
BumpTimeout = dbus.service.method(_interface)(bump_timeout)
456
BumpTimeout.__name__ = "BumpTimeout"
457
458
# CheckerCompleted - signal
459
@dbus.service.signal(_interface, signature="bqs")
460
def CheckerCompleted(self, success, condition, command):
461
"D-Bus signal"
462
pass
463
464
# CheckerStarted - signal
465
@dbus.service.signal(_interface, signature="s")
466
def CheckerStarted(self, command):
467
"D-Bus signal"
468
pass
469
470
# GetAllProperties - method
471
@dbus.service.method(_interface, out_signature="a{sv}")
472
def GetAllProperties(self):
473
"D-Bus method"
474
return dbus.Dictionary({
475
dbus.String("name"):
476
dbus.String(self.name, variant_level=1),
477
dbus.String("fingerprint"):
478
dbus.String(self.fingerprint, variant_level=1),
479
dbus.String("host"):
480
dbus.String(self.host, variant_level=1),
481
dbus.String("created"):
482
_datetime_to_dbus(self.created, variant_level=1),
483
dbus.String("last_enabled"):
484
(_datetime_to_dbus(self.last_enabled,
485
variant_level=1)
486
if self.last_enabled is not None
487
else dbus.Boolean(False, variant_level=1)),
488
dbus.String("enabled"):
489
dbus.Boolean(self.enabled, variant_level=1),
490
dbus.String("last_checked_ok"):
491
(_datetime_to_dbus(self.last_checked_ok,
492
variant_level=1)
493
if self.last_checked_ok is not None
494
else dbus.Boolean (False, variant_level=1)),
495
dbus.String("timeout"):
496
dbus.UInt64(self.timeout_milliseconds(),
497
variant_level=1),
498
dbus.String("interval"):
499
dbus.UInt64(self.interval_milliseconds(),
500
variant_level=1),
501
dbus.String("checker"):
502
dbus.String(self.checker_command,
503
variant_level=1),
504
dbus.String("checker_running"):
505
dbus.Boolean(self.checker is not None,
506
variant_level=1),
507
dbus.String("object_path"):
508
dbus.ObjectPath(self.dbus_object_path,
509
variant_level=1)
510
}, signature="sv")
511
512
# IsStillValid - method
513
IsStillValid = (dbus.service.method(_interface, out_signature="b")
514
(still_valid))
515
IsStillValid.__name__ = "IsStillValid"
516
517
# PropertyChanged - signal
518
@dbus.service.signal(_interface, signature="sv")
519
def PropertyChanged(self, property, value):
520
"D-Bus signal"
521
pass
522
523
# SetChecker - method
524
@dbus.service.method(_interface, in_signature="s")
525
def SetChecker(self, checker):
526
"D-Bus setter method"
527
self.checker_command = checker
528
# Emit D-Bus signal
529
self.PropertyChanged(dbus.String(u"checker"),
530
dbus.String(self.checker_command,
531
variant_level=1))
532
533
# SetHost - method
534
@dbus.service.method(_interface, in_signature="s")
535
def SetHost(self, host):
536
"D-Bus setter method"
537
self.host = host
538
# Emit D-Bus signal
539
self.PropertyChanged(dbus.String(u"host"),
540
dbus.String(self.host, variant_level=1))
541
542
# SetInterval - method
543
@dbus.service.method(_interface, in_signature="t")
544
def SetInterval(self, milliseconds):
545
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
546
# Emit D-Bus signal
547
self.PropertyChanged(dbus.String(u"interval"),
548
(dbus.UInt64(self.interval_milliseconds(),
549
variant_level=1)))
550
551
# SetSecret - method
552
@dbus.service.method(_interface, in_signature="ay",
553
byte_arrays=True)
554
def SetSecret(self, secret):
555
"D-Bus setter method"
556
self.secret = str(secret)
557
558
# SetTimeout - method
559
@dbus.service.method(_interface, in_signature="t")
560
def SetTimeout(self, milliseconds):
561
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
562
# Emit D-Bus signal
563
self.PropertyChanged(dbus.String(u"timeout"),
564
(dbus.UInt64(self.timeout_milliseconds(),
565
variant_level=1)))
566
567
# Enable - method
568
Enable = dbus.service.method(_interface)(enable)
569
Enable.__name__ = "Enable"
570
571
# StartChecker - method
572
@dbus.service.method(_interface)
573
def StartChecker(self):
574
"D-Bus method"
575
self.start_checker()
576
577
# Disable - method
578
@dbus.service.method(_interface)
579
def Disable(self):
580
"D-Bus method"
581
self.disable()
582
583
# StopChecker - method
584
StopChecker = dbus.service.method(_interface)(stop_checker)
585
StopChecker.__name__ = "StopChecker"
586
587
del _interface
588
366
589
367
590
368
def peer_certificate(session):
591
369
"Return the peer's OpenPGP certificate as a bytestring"
592
370
# If not an OpenPGP certificate...
593
if (gnutls.library.functions
594
.gnutls_certificate_type_get(session._c_object)
595
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
371
if gnutls.library.functions.gnutls_certificate_type_get\
372
(session._c_object) \
373
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
596
374
# ...do the normal thing
597
375
return session.peer_certificate
598
376
list_size = ctypes.c_uint()
599
cert_list = (gnutls.library.functions
600
.gnutls_certificate_get_peers
601
(session._c_object, ctypes.byref(list_size)))
377
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
378
(session._c_object, ctypes.byref(list_size))
602
379
if list_size.value == 0:
603
380
return None
604
381
cert = cert_list[0]
608
385
def fingerprint(openpgp):
609
386
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
610
387
# New GnuTLS "datum" with the OpenPGP public key
611
datum = (gnutls.library.types
612
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
613
ctypes.POINTER
614
(ctypes.c_ubyte)),
615
ctypes.c_uint(len(openpgp))))
388
datum = gnutls.library.types.gnutls_datum_t\
389
(ctypes.cast(ctypes.c_char_p(openpgp),
390
ctypes.POINTER(ctypes.c_ubyte)),
391
ctypes.c_uint(len(openpgp)))
616
392
# New empty GnuTLS certificate
617
393
crt = gnutls.library.types.gnutls_openpgp_crt_t()
618
(gnutls.library.functions
619
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
394
gnutls.library.functions.gnutls_openpgp_crt_init\
395
(ctypes.byref(crt))
620
396
# Import the OpenPGP public key into the certificate
621
(gnutls.library.functions
622
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
623
gnutls.library.constants
624
.GNUTLS_OPENPGP_FMT_RAW))
625
# Verify the self signature in the key
626
crtverify = ctypes.c_uint()
627
(gnutls.library.functions
628
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
629
if crtverify.value != 0:
630
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
631
raise gnutls.errors.CertificateSecurityError("Verify failed")
397
gnutls.library.functions.gnutls_openpgp_crt_import\
398
(crt, ctypes.byref(datum),
399
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
632
400
# New buffer for the fingerprint
633
buf = ctypes.create_string_buffer(20)
634
buf_len = ctypes.c_size_t()
401
buffer = ctypes.create_string_buffer(20)
402
buffer_length = ctypes.c_size_t()
635
403
# Get the fingerprint from the certificate into the buffer
636
(gnutls.library.functions
637
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
638
ctypes.byref(buf_len)))
404
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
405
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
639
406
# Deinit the certificate
640
407
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
641
408
# Convert the buffer to a Python bytestring
642
fpr = ctypes.string_at(buf, buf_len.value)
409
fpr = ctypes.string_at(buffer, buffer_length.value)
643
410
# Convert the bytestring to hexadecimal notation
644
411
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
645
412
return hex_fpr
646
413
647
414
648
class TCP_handler(SocketServer.BaseRequestHandler, object):
415
class tcp_handler(SocketServer.BaseRequestHandler, object):
649
416
"""A TCP request handler class.
650
417
Instantiated by IPv6_TCPServer for each request to handle it.
651
418
Note: This will run in its own forked process."""
652
419
653
420
def handle(self):
654
421
logger.info(u"TCP connection from: %s",
655
unicode(self.client_address))
656
session = (gnutls.connection
657
.ClientSession(self.request,
658
gnutls.connection
659
.X509Credentials()))
422
unicode(self.client_address))
423
session = gnutls.connection.ClientSession\
424
(self.request, gnutls.connection.X509Credentials())
660
425
661
426
line = self.request.makefile().readline()
662
427
logger.debug(u"Protocol version: %r", line)
675
440
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
676
441
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
677
442
# "+DHE-DSS"))
678
# Use a fallback default, since this MUST be set.
679
priority = self.server.settings.get("priority", "NORMAL")
680
(gnutls.library.functions
681
.gnutls_priority_set_direct(session._c_object,
682
priority, None))
443
priority = "NORMAL" # Fallback default, since this
444
# MUST be set.
445
if self.server.settings["priority"]:
446
priority = self.server.settings["priority"]
447
gnutls.library.functions.gnutls_priority_set_direct\
448
(session._c_object, priority, None);
683
449
684
450
try:
685
451
session.handshake()
695
461
session.bye()
696
462
return
697
463
logger.debug(u"Fingerprint: %s", fpr)
464
client = None
698
465
for c in self.server.clients:
699
466
if c.fingerprint == fpr:
700
467
client = c
701
468
break
702
else:
469
if not client:
703
470
logger.warning(u"Client not found for fingerprint: %s",
704
471
fpr)
705
472
session.bye()
712
479
vars(client))
713
480
session.bye()
714
481
return
715
## This won't work here, since we're in a fork.
716
# client.bump_timeout()
717
482
sent_size = 0
718
483
while sent_size < len(client.secret):
719
484
sent = session.send(client.secret[sent_size:])
724
489
session.bye()
725
490
726
491
727
class IPv6_TCPServer(SocketServer.ForkingMixIn,
728
SocketServer.TCPServer, object):
492
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
729
493
"""IPv6 TCP server. Accepts 'None' as address and/or port.
730
494
Attributes:
731
495
settings: Server settings
732
496
clients: Set() of Client objects
733
enabled: Boolean; whether this server is activated yet
734
497
"""
735
498
address_family = socket.AF_INET6
736
499
def __init__(self, *args, **kwargs):
740
503
if "clients" in kwargs:
741
504
self.clients = kwargs["clients"]
742
505
del kwargs["clients"]
743
self.enabled = False
744
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
506
return super(type(self), self).__init__(*args, **kwargs)
745
507
def server_bind(self):
746
508
"""This overrides the normal server_bind() function
747
509
to bind to an interface if one was specified, and also NOT to
776
538
# if_nametoindex
777
539
# (self.settings
778
540
# ["interface"]))
779
return super(IPv6_TCPServer, self).server_bind()
780
def server_activate(self):
781
if self.enabled:
782
return super(IPv6_TCPServer, self).server_activate()
783
def enable(self):
784
self.enabled = True
541
return super(type(self), self).server_bind()
785
542
786
543
787
544
def string_to_delta(interval):
797
554
datetime.timedelta(1)
798
555
>>> string_to_delta(u'1w')
799
556
datetime.timedelta(7)
800
>>> string_to_delta('5m 30s')
801
datetime.timedelta(0, 330)
802
557
"""
803
timevalue = datetime.timedelta(0)
804
for s in interval.split():
805
try:
806
suffix = unicode(s[-1])
807
value = int(s[:-1])
808
if suffix == u"d":
809
delta = datetime.timedelta(value)
810
elif suffix == u"s":
811
delta = datetime.timedelta(0, value)
812
elif suffix == u"m":
813
delta = datetime.timedelta(0, 0, 0, 0, value)
814
elif suffix == u"h":
815
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
816
elif suffix == u"w":
817
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
818
else:
819
raise ValueError
820
except (ValueError, IndexError):
558
try:
559
suffix=unicode(interval[-1])
560
value=int(interval[:-1])
561
if suffix == u"d":
562
delta = datetime.timedelta(value)
563
elif suffix == u"s":
564
delta = datetime.timedelta(0, value)
565
elif suffix == u"m":
566
delta = datetime.timedelta(0, 0, 0, 0, value)
567
elif suffix == u"h":
568
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
569
elif suffix == u"w":
570
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
571
else:
821
572
raise ValueError
822
timevalue += delta
823
return timevalue
573
except (ValueError, IndexError):
574
raise ValueError
575
return delta
824
576
825
577
826
578
def server_state_changed(state):
827
579
"""Derived from the Avahi example code"""
828
580
if state == avahi.SERVER_COLLISION:
829
logger.error(u"Zeroconf server name collision")
581
logger.error(u"Server name collision")
830
582
service.remove()
831
583
elif state == avahi.SERVER_RUNNING:
832
584
service.add()
834
586
835
587
def entry_group_state_changed(state, error):
836
588
"""Derived from the Avahi example code"""
837
logger.debug(u"Avahi state change: %i", state)
589
logger.debug(u"state change: %i", state)
838
590
839
591
if state == avahi.ENTRY_GROUP_ESTABLISHED:
840
logger.debug(u"Zeroconf service established.")
592
logger.debug(u"Service established.")
841
593
elif state == avahi.ENTRY_GROUP_COLLISION:
842
logger.warning(u"Zeroconf service name collision.")
594
logger.warning(u"Service name collision.")
843
595
service.rename()
844
596
elif state == avahi.ENTRY_GROUP_FAILURE:
845
logger.critical(u"Avahi: Error in group state changed %s",
597
logger.critical(u"Error in group state changed %s",
846
598
unicode(error))
847
raise AvahiGroupError(u"State changed: %s" % unicode(error))
599
raise AvahiGroupError("State changed: %s", str(error))
848
600
849
601
def if_nametoindex(interface):
850
602
"""Call the C function if_nametoindex(), or equivalent"""
851
603
global if_nametoindex
852
604
try:
853
if_nametoindex = (ctypes.cdll.LoadLibrary
854
(ctypes.util.find_library("c"))
855
.if_nametoindex)
605
if "ctypes.util" not in sys.modules:
606
import ctypes.util
607
if_nametoindex = ctypes.cdll.LoadLibrary\
608
(ctypes.util.find_library("c")).if_nametoindex
856
609
except (OSError, AttributeError):
857
610
if "struct" not in sys.modules:
858
611
import struct
861
614
def if_nametoindex(interface):
862
615
"Get an interface index the hard way, i.e. using fcntl()"
863
616
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
864
with closing(socket.socket()) as s:
865
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
866
struct.pack("16s16x", interface))
617
s = socket.socket()
618
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
619
struct.pack("16s16x", interface))
620
s.close()
867
621
interface_index = struct.unpack("I", ifreq[16:20])[0]
868
622
return interface_index
869
623
return if_nametoindex(interface)
893
647
894
648
895
649
def main():
896
parser = optparse.OptionParser(version = "%%prog %s" % version)
650
global main_loop_started
651
main_loop_started = False
652
653
parser = OptionParser()
897
654
parser.add_option("-i", "--interface", type="string",
898
655
metavar="IF", help="Bind to interface IF")
899
656
parser.add_option("-a", "--address", type="string",
900
657
help="Address to listen for requests on")
901
658
parser.add_option("-p", "--port", type="int",
902
659
help="Port number to receive requests on")
903
parser.add_option("--check", action="store_true",
660
parser.add_option("--check", action="store_true", default=False,
904
661
help="Run self-test")
905
662
parser.add_option("--debug", action="store_true",
906
663
help="Debug mode; run in foreground and log to"
913
670
default="/etc/mandos", metavar="DIR",
914
671
help="Directory to search for configuration"
915
672
" files")
916
parser.add_option("--no-dbus", action="store_false",
917
dest="use_dbus",
918
help="Do not provide D-Bus system bus"
919
" interface")
920
options = parser.parse_args()[0]
673
(options, args) = parser.parse_args()
921
674
922
675
if options.check:
923
676
import doctest
932
685
"priority":
933
686
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
934
687
"servicename": "Mandos",
935
"use_dbus": "True",
936
688
}
937
689
938
690
# Parse config file for server-global settings
939
691
server_config = ConfigParser.SafeConfigParser(server_defaults)
940
692
del server_defaults
941
693
server_config.read(os.path.join(options.configdir, "mandos.conf"))
694
server_section = "server"
942
695
# Convert the SafeConfigParser object to a dict
943
server_settings = server_config.defaults()
944
# Use getboolean on the boolean config options
945
server_settings["debug"] = (server_config.getboolean
946
("DEFAULT", "debug"))
947
server_settings["use_dbus"] = (server_config.getboolean
948
("DEFAULT", "use_dbus"))
696
server_settings = dict(server_config.items(server_section))
697
# Use getboolean on the boolean config option
698
server_settings["debug"] = server_config.getboolean\
699
(server_section, "debug")
949
700
del server_config
950
701
951
702
# Override the settings from the config file with command line
952
703
# options, if set.
953
704
for option in ("interface", "address", "port", "debug",
954
"priority", "servicename", "configdir",
955
"use_dbus"):
705
"priority", "servicename", "configdir"):
956
706
value = getattr(options, option)
957
707
if value is not None:
958
708
server_settings[option] = value
959
709
del options
960
710
# Now we have our good server settings in "server_settings"
961
711
962
# For convenience
963
debug = server_settings["debug"]
964
use_dbus = server_settings["use_dbus"]
965
966
if not debug:
967
syslogger.setLevel(logging.WARNING)
968
console.setLevel(logging.WARNING)
969
970
if server_settings["servicename"] != "Mandos":
971
syslogger.setFormatter(logging.Formatter
972
('Mandos (%s): %%(levelname)s:'
973
' %%(message)s'
974
% server_settings["servicename"]))
975
976
712
# Parse config file with clients
977
713
client_defaults = { "timeout": "1h",
978
714
"interval": "5m",
979
"checker": "fping -q -- %%(host)s",
980
"host": "",
715
"checker": "fping -q -- %%(fqdn)s",
981
716
}
982
717
client_config = ConfigParser.SafeConfigParser(client_defaults)
983
718
client_config.read(os.path.join(server_settings["configdir"],
984
719
"clients.conf"))
985
720
986
clients = Set()
987
tcp_server = IPv6_TCPServer((server_settings["address"],
988
server_settings["port"]),
989
TCP_handler,
990
settings=server_settings,
991
clients=clients)
992
pidfilename = "/var/run/mandos.pid"
993
try:
994
pidfile = open(pidfilename, "w")
995
except IOError, error:
996
logger.error("Could not open file %r", pidfilename)
997
998
try:
999
uid = pwd.getpwnam("_mandos").pw_uid
1000
gid = pwd.getpwnam("_mandos").pw_gid
1001
except KeyError:
1002
try:
1003
uid = pwd.getpwnam("mandos").pw_uid
1004
gid = pwd.getpwnam("mandos").pw_gid
1005
except KeyError:
1006
try:
1007
uid = pwd.getpwnam("nobody").pw_uid
1008
gid = pwd.getpwnam("nogroup").pw_gid
1009
except KeyError:
1010
uid = 65534
1011
gid = 65534
1012
try:
1013
os.setuid(uid)
1014
os.setgid(gid)
1015
except OSError, error:
1016
if error[0] != errno.EPERM:
1017
raise error
1018
1019
721
global service
1020
722
service = AvahiService(name = server_settings["servicename"],
1021
servicetype = "_mandos._tcp", )
723
type = "_mandos._tcp", );
1022
724
if server_settings["interface"]:
1023
service.interface = (if_nametoindex
1024
(server_settings["interface"]))
725
service.interface = if_nametoindex(server_settings["interface"])
1025
726
1026
727
global main_loop
1027
728
global bus
1030
731
DBusGMainLoop(set_as_default=True )
1031
732
main_loop = gobject.MainLoop()
1032
733
bus = dbus.SystemBus()
1033
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1034
avahi.DBUS_PATH_SERVER),
1035
avahi.DBUS_INTERFACE_SERVER)
734
server = dbus.Interface(
735
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
736
avahi.DBUS_INTERFACE_SERVER )
1036
737
# End of Avahi example code
1037
if use_dbus:
1038
bus_name = dbus.service.BusName(u"org.mandos-system.Mandos",
1039
bus)
738
739
debug = server_settings["debug"]
740
741
if debug:
742
console = logging.StreamHandler()
743
# console.setLevel(logging.DEBUG)
744
console.setFormatter(logging.Formatter\
745
('%(levelname)s: %(message)s'))
746
logger.addHandler(console)
747
del console
748
749
clients = Set()
750
def remove_from_clients(client):
751
clients.remove(client)
752
if not clients:
753
logger.critical(u"No clients left, exiting")
754
sys.exit()
1040
755
1041
756
clients.update(Set(Client(name = section,
757
stop_hook = remove_from_clients,
1042
758
config
1043
= dict(client_config.items(section)),
1044
use_dbus = use_dbus)
759
= dict(client_config.items(section)))
1045
760
for section in client_config.sections()))
1046
if not clients:
1047
logger.warning(u"No clients defined")
1048
761
1049
if debug:
1050
# Redirect stdin so all checkers get /dev/null
1051
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1052
os.dup2(null, sys.stdin.fileno())
1053
if null > 2:
1054
os.close(null)
1055
else:
1056
# No console logging
1057
logger.removeHandler(console)
1058
# Close all input and output, do double fork, etc.
762
if not debug:
1059
763
daemon()
1060
764
1061
try:
1062
pid = os.getpid()
1063
pidfile.write(str(pid) + "\n")
1064
pidfile.close()
1065
del pidfile
1066
except IOError:
1067
logger.error(u"Could not write to file %r with PID %d",
1068
pidfilename, pid)
1069
except NameError:
1070
# "pidfile" was never created
1071
pass
1072
del pidfilename
1073
1074
765
def cleanup():
1075
766
"Cleanup function; run on exit"
1076
767
global group
1082
773
1083
774
while clients:
1084
775
client = clients.pop()
1085
client.disable_hook = None
1086
client.disable()
776
client.stop_hook = None
777
client.stop()
1087
778
1088
779
atexit.register(cleanup)
1089
780
1092
783
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1093
784
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1094
785
1095
if use_dbus:
1096
class MandosServer(dbus.service.Object):
1097
"""A D-Bus proxy object"""
1098
def __init__(self):
1099
dbus.service.Object.__init__(self, bus,
1100
"/Mandos")
1101
_interface = u"org.mandos_system.Mandos"
1102
1103
@dbus.service.signal(_interface, signature="oa{sv}")
1104
def ClientAdded(self, objpath, properties):
1105
"D-Bus signal"
1106
pass
1107
1108
@dbus.service.signal(_interface, signature="os")
1109
def ClientRemoved(self, objpath, name):
1110
"D-Bus signal"
1111
pass
1112
1113
@dbus.service.method(_interface, out_signature="ao")
1114
def GetAllClients(self):
1115
return dbus.Array(c.dbus_object_path for c in clients)
1116
1117
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1118
def GetAllClientsWithProperties(self):
1119
return dbus.Dictionary(
1120
((c.dbus_object_path, c.GetAllProperties())
1121
for c in clients),
1122
signature="oa{sv}")
1123
1124
@dbus.service.method(_interface, in_signature="o")
1125
def RemoveClient(self, object_path):
1126
for c in clients:
1127
if c.dbus_object_path == object_path:
1128
clients.remove(c)
1129
# Don't signal anything except ClientRemoved
1130
c.use_dbus = False
1131
c.disable()
1132
# Emit D-Bus signal
1133
self.ClientRemoved(object_path, c.name)
1134
return
1135
raise KeyError
1136
1137
@dbus.service.method(_interface, in_signature="s")
1138
def RemoveClientByName(self, name):
1139
for c in clients:
1140
if c.name == name:
1141
clients.remove(c)
1142
# Don't signal anything except ClientRemoved
1143
c.use_dbus = False
1144
c.disable()
1145
# Emit D-Bus signal
1146
self.ClientRemoved(c.dbus_object_path, name)
1147
return
1148
raise KeyError
1149
1150
@dbus.service.method(_interface)
1151
def Quit(self):
1152
main_loop.quit()
1153
1154
del _interface
1155
1156
mandos_server = MandosServer()
1157
1158
786
for client in clients:
1159
if use_dbus:
1160
# Emit D-Bus signal
1161
mandos_server.ClientAdded(client.dbus_object_path,
1162
client.GetAllProperties())
1163
client.enable()
1164
1165
tcp_server.enable()
1166
tcp_server.server_activate()
1167
787
client.start()
788
789
tcp_server = IPv6_TCPServer((server_settings["address"],
790
server_settings["port"]),
791
tcp_handler,
792
settings=server_settings,
793
clients=clients)
1168
794
# Find out what port we got
1169
795
service.port = tcp_server.socket.getsockname()[1]
1170
796
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1184
810
1185
811
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1186
812
lambda *args, **kwargs:
1187
(tcp_server.handle_request
1188
(*args[2:], **kwargs) or True))
813
tcp_server.handle_request\
814
(*args[2:], **kwargs) or True)
1189
815
1190
logger.debug(u"Starting main loop")
816
logger.debug("Starting main loop")
817
main_loop_started = True
1191
818
main_loop.run()
1192
819
except AvahiError, error:
1193
logger.critical(u"AvahiError: %s", error)
820
logger.critical(u"AvahiError: %s" + unicode(error))
1194
821
sys.exit(1)
1195
822
except KeyboardInterrupt:
1196
823
if debug:
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