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- Committer: Björn Påhlsson
- Date: 2008-08-08 01:25:11 UTC
- mfrom: (47 mandos)
- mto: (24.1.154 mandos) (237.4.3 mandos-release)
- mto: This revision was merged to the branch mainline in revision 50.
- Revision ID: belorn@braxen-20080808012511-l6zhkmcp1geyaed0
merge
- files added:
- network-protocol.txt
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugin-runner.c => mandos-client.c
- plugins.d/mandos-client.c => plugins.d/password-request.c
- 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 Teddy Hogeborn
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# Copyright © 2008 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 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 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 = "1.0.2"
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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):
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def __init__(self, value):
86
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self.value = value
87
super(AvahiError, self).__init__()
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def __str__(self):
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return repr(self.value)
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79
112
101
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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119
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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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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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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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):
174
"""Convert a UTC datetime.datetime() to a D-Bus type."""
175
return dbus.String(dt.isoformat(), variant_level=variant_level)
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class Client(dbus.service.Object):
159
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
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name: string; from the config file, used in log messages
182
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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
190
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
198
disable_initiator_tag: - '' -
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stop_initiator_tag: - '' -
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checker_callback_tag: - '' -
200
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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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dbus_object_path: dbus.ObjectPath
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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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_interval_milliseconds: - '' -
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"""
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def _set_timeout(self, timeout):
212
"Setter function for the 'timeout' attribute"
190
"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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# Emit D-Bus signal
220
self.PropertyChanged(dbus.String(u"timeout"),
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(dbus.UInt64(self._timeout_milliseconds,
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variant_level=1)))
223
timeout = property(lambda self: self._timeout, _set_timeout)
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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):
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"Setter function for the 'interval' attribute"
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"Setter function for 'interval' attribute"
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self._interval = interval
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self._interval_milliseconds = ((self.interval.days
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* 24 * 60 * 60 * 1000)
232
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* 1000)
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+ (self.interval.microseconds
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// 1000))
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# Emit D-Bus signal
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self.PropertyChanged(dbus.String(u"interval"),
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(dbus.UInt64(self._interval_milliseconds,
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variant_level=1)))
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interval = property(lambda self: self._interval, _set_interval)
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interval = property(lambda self: self._interval,
210
_set_interval)
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del _set_interval
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def __init__(self, name = None, disable_hook=None, config=None):
212
def __init__(self, name = None, stop_hook=None, config={}):
243
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"""Note: the 'checker' key in 'config' sets the
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'checker_command' attribute and *not* the 'checker'
245
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attribute."""
246
self.dbus_object_path = (dbus.ObjectPath
247
("/Mandos/clients/"
248
+ name.replace(".", "_")))
249
dbus.service.Object.__init__(self, bus,
250
self.dbus_object_path)
251
if config is None:
252
config = {}
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self.name = name
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logger.debug(u"Creating client %r", self.name)
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218
# 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
258
self.fingerprint = (config["fingerprint"].upper()
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.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)
261
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if "secret" in config:
262
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self.secret = config["secret"].decode(u"base64")
263
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elif "secfile" in config:
264
with closing(open(os.path.expanduser
265
(os.path.expandvars
266
(config["secfile"])))) as secfile:
267
self.secret = secfile.read()
227
sf = open(config["secfile"])
228
self.secret = sf.read()
229
sf.close()
268
230
else:
269
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raise TypeError(u"No secret or secfile for client %s"
270
232
% self.name)
271
self.host = config.get("host", "")
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self.created = datetime.datetime.utcnow()
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self.enabled = False
274
self.last_enabled = None
233
self.fqdn = config.get("fqdn", "")
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self.created = datetime.datetime.now()
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self.last_checked_ok = None
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self.timeout = string_to_delta(config["timeout"])
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self.interval = string_to_delta(config["interval"])
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self.disable_hook = disable_hook
238
self.stop_hook = stop_hook
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self.checker = None
280
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self.checker_initiator_tag = None
281
self.disable_initiator_tag = None
241
self.stop_initiator_tag = None
282
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self.checker_callback_tag = None
283
self.checker_command = config["checker"]
284
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def enable(self):
243
self.check_command = config["checker"]
244
def start(self):
286
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"""Start this client's checker and timeout hooks"""
287
self.last_enabled = datetime.datetime.utcnow()
288
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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.
290
self.checker_initiator_tag = (gobject.timeout_add
291
(self._interval_milliseconds,
292
self.start_checker))
248
self.checker_initiator_tag = gobject.timeout_add\
249
(self._interval_milliseconds,
250
self.start_checker)
293
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# Also start a new checker *right now*.
294
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self.start_checker()
295
# Schedule a disable() when 'timeout' has passed
296
self.disable_initiator_tag = (gobject.timeout_add
297
(self._timeout_milliseconds,
298
self.disable))
299
self.enabled = True
300
# Emit D-Bus signal
301
self.PropertyChanged(dbus.String(u"enabled"),
302
dbus.Boolean(True, variant_level=1))
303
self.PropertyChanged(dbus.String(u"last_enabled"),
304
(_datetime_to_dbus(self.last_enabled,
305
variant_level=1)))
306
307
def disable(self):
308
"""Disable this client."""
309
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:
310
266
return False
311
logger.info(u"Disabling client %s", self.name)
312
if getattr(self, "disable_initiator_tag", False):
313
gobject.source_remove(self.disable_initiator_tag)
314
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
315
270
if getattr(self, "checker_initiator_tag", False):
316
271
gobject.source_remove(self.checker_initiator_tag)
317
272
self.checker_initiator_tag = None
318
273
self.stop_checker()
319
if self.disable_hook:
320
self.disable_hook(self)
321
self.enabled = False
322
# Emit D-Bus signal
323
self.PropertyChanged(dbus.String(u"enabled"),
324
dbus.Boolean(False, variant_level=1))
274
if self.stop_hook:
275
self.stop_hook(self)
325
276
# Do not run this again if called by a gobject.timeout_add
326
277
return False
327
328
278
def __del__(self):
329
self.disable_hook = None
330
self.disable()
331
332
def checker_callback(self, pid, condition, command):
279
self.stop_hook = None
280
self.stop()
281
def checker_callback(self, pid, condition):
333
282
"""The checker has completed, so take appropriate actions."""
283
now = datetime.datetime.now()
334
284
self.checker_callback_tag = None
335
285
self.checker = None
336
# Emit D-Bus signal
337
self.PropertyChanged(dbus.String(u"checker_running"),
338
dbus.Boolean(False, variant_level=1))
339
if (os.WIFEXITED(condition)
340
and (os.WEXITSTATUS(condition) == 0)):
286
if os.WIFEXITED(condition) \
287
and (os.WEXITSTATUS(condition) == 0):
341
288
logger.info(u"Checker for %(name)s succeeded",
342
289
vars(self))
343
# Emit D-Bus signal
344
self.CheckerCompleted(dbus.Boolean(True),
345
dbus.UInt16(condition),
346
dbus.String(command))
347
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)
348
295
elif not os.WIFEXITED(condition):
349
296
logger.warning(u"Checker for %(name)s crashed?",
350
297
vars(self))
351
# Emit D-Bus signal
352
self.CheckerCompleted(dbus.Boolean(False),
353
dbus.UInt16(condition),
354
dbus.String(command))
355
298
else:
356
299
logger.info(u"Checker for %(name)s failed",
357
300
vars(self))
358
# Emit D-Bus signal
359
self.CheckerCompleted(dbus.Boolean(False),
360
dbus.UInt16(condition),
361
dbus.String(command))
362
363
def bump_timeout(self):
364
"""Bump up the timeout for this client.
365
This should only be called when the client has been seen,
366
alive and well.
367
"""
368
self.last_checked_ok = datetime.datetime.utcnow()
369
gobject.source_remove(self.disable_initiator_tag)
370
self.disable_initiator_tag = (gobject.timeout_add
371
(self._timeout_milliseconds,
372
self.disable))
373
self.PropertyChanged(dbus.String(u"last_checked_ok"),
374
(_datetime_to_dbus(self.last_checked_ok,
375
variant_level=1)))
376
377
301
def start_checker(self):
378
302
"""Start a new checker subprocess if one is not running.
379
303
If a checker already exists, leave it running and do
388
312
# is as it should be.
389
313
if self.checker is None:
390
314
try:
391
# In case checker_command has exactly one % operator
392
command = self.checker_command % self.host
315
# In case check_command has exactly one % operator
316
command = self.check_command % self.fqdn
393
317
except TypeError:
394
318
# Escape attributes for the shell
395
319
escaped_attrs = dict((key, re.escape(str(val)))
396
320
for key, val in
397
321
vars(self).iteritems())
398
322
try:
399
command = self.checker_command % escaped_attrs
323
command = self.check_command % escaped_attrs
400
324
except TypeError, error:
401
325
logger.error(u'Could not format string "%s":'
402
u' %s', self.checker_command, error)
326
u' %s', self.check_command, error)
403
327
return True # Try again later
404
328
try:
405
329
logger.info(u"Starting checker %r for %s",
406
330
command, self.name)
407
# We don't need to redirect stdout and stderr, since
408
# in normal mode, that is already done by daemon(),
409
# and in debug mode we don't want to. (Stdin is
410
# always replaced by /dev/null.)
411
331
self.checker = subprocess.Popen(command,
412
332
close_fds=True,
413
333
shell=True, cwd="/")
414
# Emit D-Bus signal
415
self.CheckerStarted(command)
416
self.PropertyChanged(dbus.String("checker_running"),
417
dbus.Boolean(True, variant_level=1))
418
self.checker_callback_tag = (gobject.child_watch_add
419
(self.checker.pid,
420
self.checker_callback,
421
data=command))
422
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:
423
338
logger.error(u"Failed to start subprocess: %s",
424
339
error)
425
340
# Re-run this periodically if run by gobject.timeout_add
426
341
return True
427
428
342
def stop_checker(self):
429
343
"""Force the checker process, if any, to stop."""
430
344
if self.checker_callback_tag:
432
346
self.checker_callback_tag = None
433
347
if getattr(self, "checker", None) is None:
434
348
return
435
logger.debug(u"Stopping checker for %(name)s", vars(self))
349
logger.debug("Stopping checker for %(name)s", vars(self))
436
350
try:
437
351
os.kill(self.checker.pid, signal.SIGTERM)
438
352
#os.sleep(0.5)
442
356
if error.errno != errno.ESRCH: # No such process
443
357
raise
444
358
self.checker = None
445
self.PropertyChanged(dbus.String(u"checker_running"),
446
dbus.Boolean(False, variant_level=1))
447
448
359
def still_valid(self):
449
360
"""Has the timeout not yet passed for this client?"""
450
if not getattr(self, "enabled", False):
451
return False
452
now = datetime.datetime.utcnow()
361
now = datetime.datetime.now()
453
362
if self.last_checked_ok is None:
454
363
return now < (self.created + self.timeout)
455
364
else:
456
365
return now < (self.last_checked_ok + self.timeout)
457
458
## D-Bus methods & signals
459
_interface = u"org.mandos_system.Mandos.Client"
460
461
# BumpTimeout - method
462
BumpTimeout = dbus.service.method(_interface)(bump_timeout)
463
BumpTimeout.__name__ = "BumpTimeout"
464
465
# CheckerCompleted - signal
466
@dbus.service.signal(_interface, signature="bqs")
467
def CheckerCompleted(self, success, condition, command):
468
"D-Bus signal"
469
pass
470
471
# CheckerStarted - signal
472
@dbus.service.signal(_interface, signature="s")
473
def CheckerStarted(self, command):
474
"D-Bus signal"
475
pass
476
477
# GetAllProperties - method
478
@dbus.service.method(_interface, out_signature="a{sv}")
479
def GetAllProperties(self):
480
"D-Bus method"
481
return dbus.Dictionary({
482
dbus.String("name"):
483
dbus.String(self.name, variant_level=1),
484
dbus.String("fingerprint"):
485
dbus.String(self.fingerprint, variant_level=1),
486
dbus.String("host"):
487
dbus.String(self.host, variant_level=1),
488
dbus.String("created"):
489
_datetime_to_dbus(self.created, variant_level=1),
490
dbus.String("last_enabled"):
491
(_datetime_to_dbus(self.last_enabled,
492
variant_level=1)
493
if self.last_enabled is not None
494
else dbus.Boolean(False, variant_level=1)),
495
dbus.String("enabled"):
496
dbus.Boolean(self.enabled, variant_level=1),
497
dbus.String("last_checked_ok"):
498
(_datetime_to_dbus(self.last_checked_ok,
499
variant_level=1)
500
if self.last_checked_ok is not None
501
else dbus.Boolean (False, variant_level=1)),
502
dbus.String("timeout"):
503
dbus.UInt64(self._timeout_milliseconds,
504
variant_level=1),
505
dbus.String("interval"):
506
dbus.UInt64(self._interval_milliseconds,
507
variant_level=1),
508
dbus.String("checker"):
509
dbus.String(self.checker_command,
510
variant_level=1),
511
dbus.String("checker_running"):
512
dbus.Boolean(self.checker is not None,
513
variant_level=1),
514
}, signature="sv")
515
516
# IsStillValid - method
517
IsStillValid = (dbus.service.method(_interface, out_signature="b")
518
(still_valid))
519
IsStillValid.__name__ = "IsStillValid"
520
521
# PropertyChanged - signal
522
@dbus.service.signal(_interface, signature="sv")
523
def PropertyChanged(self, property, value):
524
"D-Bus signal"
525
pass
526
527
# SetChecker - method
528
@dbus.service.method(_interface, in_signature="s")
529
def SetChecker(self, checker):
530
"D-Bus setter method"
531
self.checker_command = checker
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
539
# SetInterval - method
540
@dbus.service.method(_interface, in_signature="t")
541
def SetInterval(self, milliseconds):
542
self.interval = datetime.timdeelta(0, 0, 0, milliseconds)
543
544
# SetSecret - method
545
@dbus.service.method(_interface, in_signature="ay",
546
byte_arrays=True)
547
def SetSecret(self, secret):
548
"D-Bus setter method"
549
self.secret = str(secret)
550
551
# SetTimeout - method
552
@dbus.service.method(_interface, in_signature="t")
553
def SetTimeout(self, milliseconds):
554
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
555
556
# Enable - method
557
Enable = dbus.service.method(_interface)(enable)
558
Enable.__name__ = "Enable"
559
560
# StartChecker - method
561
@dbus.service.method(_interface)
562
def StartChecker(self):
563
"D-Bus method"
564
self.start_checker()
565
566
# Disable - method
567
@dbus.service.method(_interface)
568
def Disable(self):
569
"D-Bus method"
570
self.disable()
571
572
# StopChecker - method
573
StopChecker = dbus.service.method(_interface)(stop_checker)
574
StopChecker.__name__ = "StopChecker"
575
576
del _interface
577
366
578
367
579
368
def peer_certificate(session):
580
369
"Return the peer's OpenPGP certificate as a bytestring"
581
370
# If not an OpenPGP certificate...
582
if (gnutls.library.functions
583
.gnutls_certificate_type_get(session._c_object)
584
!= 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:
585
374
# ...do the normal thing
586
375
return session.peer_certificate
587
376
list_size = ctypes.c_uint()
588
cert_list = (gnutls.library.functions
589
.gnutls_certificate_get_peers
590
(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))
591
379
if list_size.value == 0:
592
380
return None
593
381
cert = cert_list[0]
597
385
def fingerprint(openpgp):
598
386
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
599
387
# New GnuTLS "datum" with the OpenPGP public key
600
datum = (gnutls.library.types
601
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
602
ctypes.POINTER
603
(ctypes.c_ubyte)),
604
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)))
605
392
# New empty GnuTLS certificate
606
393
crt = gnutls.library.types.gnutls_openpgp_crt_t()
607
(gnutls.library.functions
608
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
394
gnutls.library.functions.gnutls_openpgp_crt_init\
395
(ctypes.byref(crt))
609
396
# Import the OpenPGP public key into the certificate
610
(gnutls.library.functions
611
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
612
gnutls.library.constants
613
.GNUTLS_OPENPGP_FMT_RAW))
614
# Verify the self signature in the key
615
crtverify = ctypes.c_uint()
616
(gnutls.library.functions
617
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
618
if crtverify.value != 0:
619
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
620
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)
621
400
# New buffer for the fingerprint
622
buf = ctypes.create_string_buffer(20)
623
buf_len = ctypes.c_size_t()
401
buffer = ctypes.create_string_buffer(20)
402
buffer_length = ctypes.c_size_t()
624
403
# Get the fingerprint from the certificate into the buffer
625
(gnutls.library.functions
626
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
627
ctypes.byref(buf_len)))
404
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
405
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
628
406
# Deinit the certificate
629
407
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
630
408
# Convert the buffer to a Python bytestring
631
fpr = ctypes.string_at(buf, buf_len.value)
409
fpr = ctypes.string_at(buffer, buffer_length.value)
632
410
# Convert the bytestring to hexadecimal notation
633
411
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
634
412
return hex_fpr
635
413
636
414
637
class TCP_handler(SocketServer.BaseRequestHandler, object):
415
class tcp_handler(SocketServer.BaseRequestHandler, object):
638
416
"""A TCP request handler class.
639
417
Instantiated by IPv6_TCPServer for each request to handle it.
640
418
Note: This will run in its own forked process."""
641
419
642
420
def handle(self):
643
421
logger.info(u"TCP connection from: %s",
644
unicode(self.client_address))
645
session = (gnutls.connection
646
.ClientSession(self.request,
647
gnutls.connection
648
.X509Credentials()))
422
unicode(self.client_address))
423
session = gnutls.connection.ClientSession\
424
(self.request, gnutls.connection.X509Credentials())
649
425
650
426
line = self.request.makefile().readline()
651
427
logger.debug(u"Protocol version: %r", line)
664
440
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
665
441
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
666
442
# "+DHE-DSS"))
667
# Use a fallback default, since this MUST be set.
668
priority = self.server.settings.get("priority", "NORMAL")
669
(gnutls.library.functions
670
.gnutls_priority_set_direct(session._c_object,
671
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);
672
449
673
450
try:
674
451
session.handshake()
684
461
session.bye()
685
462
return
686
463
logger.debug(u"Fingerprint: %s", fpr)
464
client = None
687
465
for c in self.server.clients:
688
466
if c.fingerprint == fpr:
689
467
client = c
690
468
break
691
else:
469
if not client:
692
470
logger.warning(u"Client not found for fingerprint: %s",
693
471
fpr)
694
472
session.bye()
701
479
vars(client))
702
480
session.bye()
703
481
return
704
## This won't work here, since we're in a fork.
705
# client.bump_timeout()
706
482
sent_size = 0
707
483
while sent_size < len(client.secret):
708
484
sent = session.send(client.secret[sent_size:])
713
489
session.bye()
714
490
715
491
716
class IPv6_TCPServer(SocketServer.ForkingMixIn,
717
SocketServer.TCPServer, object):
492
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
718
493
"""IPv6 TCP server. Accepts 'None' as address and/or port.
719
494
Attributes:
720
495
settings: Server settings
721
496
clients: Set() of Client objects
722
enabled: Boolean; whether this server is activated yet
723
497
"""
724
498
address_family = socket.AF_INET6
725
499
def __init__(self, *args, **kwargs):
729
503
if "clients" in kwargs:
730
504
self.clients = kwargs["clients"]
731
505
del kwargs["clients"]
732
self.enabled = False
733
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
506
return super(type(self), self).__init__(*args, **kwargs)
734
507
def server_bind(self):
735
508
"""This overrides the normal server_bind() function
736
509
to bind to an interface if one was specified, and also NOT to
755
528
in6addr_any = "::"
756
529
self.server_address = (in6addr_any,
757
530
self.server_address[1])
758
elif not self.server_address[1]:
531
elif self.server_address[1] is None:
759
532
self.server_address = (self.server_address[0],
760
533
0)
761
# if self.settings["interface"]:
762
# self.server_address = (self.server_address[0],
763
# 0, # port
764
# 0, # flowinfo
765
# if_nametoindex
766
# (self.settings
767
# ["interface"]))
768
return super(IPv6_TCPServer, self).server_bind()
769
def server_activate(self):
770
if self.enabled:
771
return super(IPv6_TCPServer, self).server_activate()
772
def enable(self):
773
self.enabled = True
534
return super(type(self), self).server_bind()
774
535
775
536
776
537
def string_to_delta(interval):
786
547
datetime.timedelta(1)
787
548
>>> string_to_delta(u'1w')
788
549
datetime.timedelta(7)
789
>>> string_to_delta('5m 30s')
790
datetime.timedelta(0, 330)
791
550
"""
792
timevalue = datetime.timedelta(0)
793
for s in interval.split():
794
try:
795
suffix = unicode(s[-1])
796
value = int(s[:-1])
797
if suffix == u"d":
798
delta = datetime.timedelta(value)
799
elif suffix == u"s":
800
delta = datetime.timedelta(0, value)
801
elif suffix == u"m":
802
delta = datetime.timedelta(0, 0, 0, 0, value)
803
elif suffix == u"h":
804
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
805
elif suffix == u"w":
806
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
807
else:
808
raise ValueError
809
except (ValueError, IndexError):
551
try:
552
suffix=unicode(interval[-1])
553
value=int(interval[:-1])
554
if suffix == u"d":
555
delta = datetime.timedelta(value)
556
elif suffix == u"s":
557
delta = datetime.timedelta(0, value)
558
elif suffix == u"m":
559
delta = datetime.timedelta(0, 0, 0, 0, value)
560
elif suffix == u"h":
561
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
562
elif suffix == u"w":
563
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
564
else:
810
565
raise ValueError
811
timevalue += delta
812
return timevalue
566
except (ValueError, IndexError):
567
raise ValueError
568
return delta
813
569
814
570
815
571
def server_state_changed(state):
816
572
"""Derived from the Avahi example code"""
817
573
if state == avahi.SERVER_COLLISION:
818
logger.error(u"Zeroconf server name collision")
574
logger.error(u"Server name collision")
819
575
service.remove()
820
576
elif state == avahi.SERVER_RUNNING:
821
577
service.add()
823
579
824
580
def entry_group_state_changed(state, error):
825
581
"""Derived from the Avahi example code"""
826
logger.debug(u"Avahi state change: %i", state)
582
logger.debug(u"state change: %i", state)
827
583
828
584
if state == avahi.ENTRY_GROUP_ESTABLISHED:
829
logger.debug(u"Zeroconf service established.")
585
logger.debug(u"Service established.")
830
586
elif state == avahi.ENTRY_GROUP_COLLISION:
831
logger.warning(u"Zeroconf service name collision.")
587
logger.warning(u"Service name collision.")
832
588
service.rename()
833
589
elif state == avahi.ENTRY_GROUP_FAILURE:
834
logger.critical(u"Avahi: Error in group state changed %s",
590
logger.critical(u"Error in group state changed %s",
835
591
unicode(error))
836
592
raise AvahiGroupError("State changed: %s", str(error))
837
593
839
595
"""Call the C function if_nametoindex(), or equivalent"""
840
596
global if_nametoindex
841
597
try:
842
if_nametoindex = (ctypes.cdll.LoadLibrary
843
(ctypes.util.find_library("c"))
844
.if_nametoindex)
598
if "ctypes.util" not in sys.modules:
599
import ctypes.util
600
if_nametoindex = ctypes.cdll.LoadLibrary\
601
(ctypes.util.find_library("c")).if_nametoindex
845
602
except (OSError, AttributeError):
846
603
if "struct" not in sys.modules:
847
604
import struct
850
607
def if_nametoindex(interface):
851
608
"Get an interface index the hard way, i.e. using fcntl()"
852
609
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
853
with closing(socket.socket()) as s:
854
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
855
struct.pack("16s16x", interface))
610
s = socket.socket()
611
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
612
struct.pack("16s16x", interface))
613
s.close()
856
614
interface_index = struct.unpack("I", ifreq[16:20])[0]
857
615
return interface_index
858
616
return if_nametoindex(interface)
882
640
883
641
884
642
def main():
885
parser = OptionParser(version = "%%prog %s" % version)
643
global main_loop_started
644
main_loop_started = False
645
646
parser = OptionParser()
886
647
parser.add_option("-i", "--interface", type="string",
887
648
metavar="IF", help="Bind to interface IF")
888
649
parser.add_option("-a", "--address", type="string",
891
652
help="Port number to receive requests on")
892
653
parser.add_option("--check", action="store_true", default=False,
893
654
help="Run self-test")
894
parser.add_option("--debug", action="store_true",
655
parser.add_option("--debug", action="store_true", default=False,
895
656
help="Debug mode; run in foreground and log to"
896
657
" terminal")
897
658
parser.add_option("--priority", type="string", help="GnuTLS"
902
663
default="/etc/mandos", metavar="DIR",
903
664
help="Directory to search for configuration"
904
665
" files")
905
options = parser.parse_args()[0]
666
(options, args) = parser.parse_args()
906
667
907
668
if options.check:
908
669
import doctest
923
684
server_config = ConfigParser.SafeConfigParser(server_defaults)
924
685
del server_defaults
925
686
server_config.read(os.path.join(options.configdir, "mandos.conf"))
687
server_section = "server"
926
688
# Convert the SafeConfigParser object to a dict
927
server_settings = server_config.defaults()
689
server_settings = dict(server_config.items(server_section))
928
690
# Use getboolean on the boolean config option
929
server_settings["debug"] = (server_config.getboolean
930
("DEFAULT", "debug"))
691
server_settings["debug"] = server_config.getboolean\
692
(server_section, "debug")
931
693
del server_config
932
694
933
695
# Override the settings from the config file with command line
940
702
del options
941
703
# Now we have our good server settings in "server_settings"
942
704
943
debug = server_settings["debug"]
944
945
if not debug:
946
syslogger.setLevel(logging.WARNING)
947
console.setLevel(logging.WARNING)
948
949
if server_settings["servicename"] != "Mandos":
950
syslogger.setFormatter(logging.Formatter
951
('Mandos (%s): %%(levelname)s:'
952
' %%(message)s'
953
% server_settings["servicename"]))
954
955
705
# Parse config file with clients
956
706
client_defaults = { "timeout": "1h",
957
707
"interval": "5m",
958
"checker": "fping -q -- %(host)s",
959
"host": "",
708
"checker": "fping -q -- %%(fqdn)s",
960
709
}
961
710
client_config = ConfigParser.SafeConfigParser(client_defaults)
962
711
client_config.read(os.path.join(server_settings["configdir"],
963
712
"clients.conf"))
964
713
965
clients = Set()
966
tcp_server = IPv6_TCPServer((server_settings["address"],
967
server_settings["port"]),
968
TCP_handler,
969
settings=server_settings,
970
clients=clients)
971
pidfilename = "/var/run/mandos.pid"
972
try:
973
pidfile = open(pidfilename, "w")
974
except IOError, error:
975
logger.error("Could not open file %r", pidfilename)
976
977
try:
978
uid = pwd.getpwnam("_mandos").pw_uid
979
except KeyError:
980
try:
981
uid = pwd.getpwnam("mandos").pw_uid
982
except KeyError:
983
try:
984
uid = pwd.getpwnam("nobody").pw_uid
985
except KeyError:
986
uid = 65534
987
try:
988
gid = pwd.getpwnam("_mandos").pw_gid
989
except KeyError:
990
try:
991
gid = pwd.getpwnam("mandos").pw_gid
992
except KeyError:
993
try:
994
gid = pwd.getpwnam("nogroup").pw_gid
995
except KeyError:
996
gid = 65534
997
try:
998
os.setuid(uid)
999
os.setgid(gid)
1000
except OSError, error:
1001
if error[0] != errno.EPERM:
1002
raise error
1003
1004
714
global service
1005
715
service = AvahiService(name = server_settings["servicename"],
1006
servicetype = "_mandos._tcp", )
716
type = "_mandos._tcp", );
1007
717
if server_settings["interface"]:
1008
service.interface = (if_nametoindex
1009
(server_settings["interface"]))
718
service.interface = if_nametoindex(server_settings["interface"])
1010
719
1011
720
global main_loop
1012
721
global bus
1015
724
DBusGMainLoop(set_as_default=True )
1016
725
main_loop = gobject.MainLoop()
1017
726
bus = dbus.SystemBus()
1018
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1019
avahi.DBUS_PATH_SERVER),
1020
avahi.DBUS_INTERFACE_SERVER)
727
server = dbus.Interface(
728
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
729
avahi.DBUS_INTERFACE_SERVER )
1021
730
# End of Avahi example code
1022
bus_name = dbus.service.BusName(u"org.mandos-system.Mandos", bus)
731
732
debug = server_settings["debug"]
733
734
if debug:
735
console = logging.StreamHandler()
736
# console.setLevel(logging.DEBUG)
737
console.setFormatter(logging.Formatter\
738
('%(levelname)s: %(message)s'))
739
logger.addHandler(console)
740
del console
741
742
clients = Set()
743
def remove_from_clients(client):
744
clients.remove(client)
745
if not clients:
746
logger.critical(u"No clients left, exiting")
747
sys.exit()
1023
748
1024
749
clients.update(Set(Client(name = section,
750
stop_hook = remove_from_clients,
1025
751
config
1026
752
= dict(client_config.items(section)))
1027
753
for section in client_config.sections()))
1028
if not clients:
1029
logger.critical(u"No clients defined")
1030
sys.exit(1)
1031
754
1032
if debug:
1033
# Redirect stdin so all checkers get /dev/null
1034
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1035
os.dup2(null, sys.stdin.fileno())
1036
if null > 2:
1037
os.close(null)
1038
else:
1039
# No console logging
1040
logger.removeHandler(console)
1041
# Close all input and output, do double fork, etc.
755
if not debug:
1042
756
daemon()
1043
757
1044
try:
1045
pid = os.getpid()
1046
pidfile.write(str(pid) + "\n")
1047
pidfile.close()
1048
del pidfile
1049
except IOError:
1050
logger.error(u"Could not write to file %r with PID %d",
1051
pidfilename, pid)
1052
except NameError:
1053
# "pidfile" was never created
1054
pass
1055
del pidfilename
1056
1057
758
def cleanup():
1058
759
"Cleanup function; run on exit"
1059
760
global group
1065
766
1066
767
while clients:
1067
768
client = clients.pop()
1068
client.disable_hook = None
1069
client.disable()
769
client.stop_hook = None
770
client.stop()
1070
771
1071
772
atexit.register(cleanup)
1072
773
1075
776
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1076
777
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1077
778
1078
class MandosServer(dbus.service.Object):
1079
"""A D-Bus proxy object"""
1080
def __init__(self):
1081
dbus.service.Object.__init__(self, bus,
1082
"/Mandos")
1083
_interface = u"org.mandos_system.Mandos"
1084
1085
@dbus.service.signal(_interface, signature="oa{sv}")
1086
def ClientAdded(self, objpath, properties):
1087
"D-Bus signal"
1088
pass
1089
1090
@dbus.service.signal(_interface, signature="o")
1091
def ClientRemoved(self, objpath):
1092
"D-Bus signal"
1093
pass
1094
1095
@dbus.service.method(_interface, out_signature="ao")
1096
def GetAllClients(self):
1097
return dbus.Array(c.dbus_object_path for c in clients)
1098
1099
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1100
def GetAllClientsWithProperties(self):
1101
return dbus.Dictionary(
1102
((c.dbus_object_path, c.GetAllProperties())
1103
for c in clients),
1104
signature="oa{sv}")
1105
1106
@dbus.service.method(_interface, in_signature="o")
1107
def RemoveClient(self, object_path):
1108
for c in clients:
1109
if c.dbus_object_path == object_path:
1110
c.disable()
1111
clients.remove(c)
1112
return
1113
raise KeyError
1114
1115
del _interface
1116
1117
mandos_server = MandosServer()
1118
1119
779
for client in clients:
1120
# Emit D-Bus signal
1121
mandos_server.ClientAdded(client.dbus_object_path,
1122
client.GetAllProperties())
1123
client.enable()
1124
1125
tcp_server.enable()
1126
tcp_server.server_activate()
1127
780
client.start()
781
782
tcp_server = IPv6_TCPServer((server_settings["address"],
783
server_settings["port"]),
784
tcp_handler,
785
settings=server_settings,
786
clients=clients)
1128
787
# Find out what port we got
1129
788
service.port = tcp_server.socket.getsockname()[1]
1130
789
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1144
803
1145
804
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1146
805
lambda *args, **kwargs:
1147
(tcp_server.handle_request
1148
(*args[2:], **kwargs) or True))
806
tcp_server.handle_request\
807
(*args[2:], **kwargs) or True)
1149
808
1150
logger.debug(u"Starting main loop")
809
logger.debug("Starting main loop")
810
main_loop_started = True
1151
811
main_loop.run()
1152
812
except AvahiError, error:
1153
813
logger.critical(u"AvahiError: %s" + unicode(error))
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0