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- Committer: Björn Påhlsson
- Date: 2010-08-22 18:35:37 UTC
- mto: (24.1.154 mandos) (237.4.3 mandos-release)
- mto: This revision was merged to the branch mainline in revision 421.
- Revision ID: belorn@fukt.bsnet.se-20100822183537-6trr1puyjvk14ejg
* mandos: Added ClientDBus.approve_pending property. Exposed
approved_by_default, approved_delay, approved_duration as
D-Bus properties.
approved_by_default, approved_delay, approved_duration as
D-Bus properties.
- files added:
- .bzr-builddeb
- debian
- debian/po
- files removed:
- debian
- files modified:
- .bzrignore
added
removed
mandos
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6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
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8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
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# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
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# and some lines in "main".
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# methods "add", "remove", "server_state_changed",
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# "entry_group_state_changed", "cleanup", and "activate" in the
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# "AvahiService" class, and some lines in "main".
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#
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# Everything else is
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# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
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# Copyright © 2008,2009 Teddy Hogeborn
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# Copyright © 2008,2009 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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# Contact the authors at <mandos@fukt.bsnet.se>.
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#
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from __future__ import division
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from __future__ import division, with_statement, absolute_import
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import SocketServer
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import SocketServer as 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 optparse
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import datetime
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import errno
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import gnutls.crypto
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import gnutls.library.functions
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import gnutls.library.constants
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import gnutls.library.types
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import ConfigParser
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import ConfigParser as configparser
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import sys
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import re
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import os
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import signal
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from sets import Set
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import subprocess
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import atexit
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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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import contextlib
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import struct
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import fcntl
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import functools
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import cPickle as pickle
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import multiprocessing
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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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version = "1.0"
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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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import ctypes.util
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import xml.dom.minidom
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import inspect
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try:
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SO_BINDTODEVICE = socket.SO_BINDTODEVICE
77
except AttributeError:
78
try:
79
from IN import SO_BINDTODEVICE
80
except ImportError:
81
SO_BINDTODEVICE = None
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version = "1.0.14"
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logger = logging.Logger(u'mandos')
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syslogger = (logging.handlers.SysLogHandler
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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = "/dev/log"))
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syslogger.setFormatter(logging.Formatter
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(u'Mandos [%(process)d]: %(levelname)s:'
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u' %(message)s'))
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logger.addHandler(syslogger)
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console = logging.StreamHandler()
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console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
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' %(message)s'))
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console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
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u' %(levelname)s:'
98
u' %(message)s'))
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logger.addHandler(console)
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multiprocessing_manager = multiprocessing.Manager()
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class AvahiError(Exception):
82
def __init__(self, value):
104
def __init__(self, value, *args, **kwargs):
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105
self.value = value
84
def __str__(self):
85
return repr(self.value)
106
super(AvahiError, self).__init__(value, *args, **kwargs)
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def __unicode__(self):
108
return unicode(repr(self.value))
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class AvahiServiceError(AvahiError):
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pass
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class AvahiService(object):
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"""An Avahi (Zeroconf) service.
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Attributes:
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interface: integer; avahi.IF_UNSPEC or an interface index.
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Used to optionally bind to the specified interface.
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name: string; Example: 'Mandos'
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type: string; Example: '_mandos._tcp'.
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name: string; Example: u'Mandos'
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type: string; Example: u'_mandos._tcp'.
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See <http://www.dns-sd.org/ServiceTypes.html>
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port: integer; what port to announce
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TXT: list of strings; TXT record for the service
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max_renames: integer; maximum number of renames
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131
rename_count: integer; counter so we only rename after collisions
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132
a sensible number of times
133
group: D-Bus Entry Group
134
server: D-Bus Server
135
bus: dbus.SystemBus()
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136
"""
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def __init__(self, interface = avahi.IF_UNSPEC, name = None,
111
type = None, port = None, TXT = None, domain = "",
112
host = "", max_renames = 32768):
138
servicetype = None, port = None, TXT = None,
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domain = u"", host = u"", max_renames = 32768,
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protocol = avahi.PROTO_UNSPEC, bus = None):
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self.interface = interface
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142
self.name = name
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self.type = type
143
self.type = servicetype
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144
self.port = port
117
if TXT is None:
118
self.TXT = []
119
else:
120
self.TXT = TXT
145
self.TXT = TXT if TXT is not None else []
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self.domain = domain
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147
self.host = host
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148
self.rename_count = 0
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149
self.max_renames = max_renames
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self.protocol = protocol
151
self.group = None # our entry group
152
self.server = None
153
self.bus = bus
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154
def rename(self):
126
155
"""Derived from the Avahi example code"""
127
156
if self.rename_count >= self.max_renames:
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157
logger.critical(u"No suitable Zeroconf service name found"
129
158
u" after %i retries, exiting.",
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rename_count)
131
raise AvahiServiceError("Too many renames")
132
self.name = server.GetAlternativeServiceName(self.name)
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self.rename_count)
160
raise AvahiServiceError(u"Too many renames")
161
self.name = self.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\
136
('Mandos (%s): %%(levelname)s:'
137
' %%(message)s' % self.name))
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unicode(self.name))
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syslogger.setFormatter(logging.Formatter
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(u'Mandos (%s) [%%(process)d]:'
166
u' %%(levelname)s: %%(message)s'
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% self.name))
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168
self.remove()
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169
self.add()
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self.rename_count += 1
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171
def remove(self):
142
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"""Derived from the Avahi example code"""
143
if group is not None:
144
group.Reset()
173
if self.group is not None:
174
self.group.Reset()
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def add(self):
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"""Derived from the Avahi example code"""
147
global group
148
if group is None:
149
group = dbus.Interface\
150
(bus.get_object(avahi.DBUS_NAME,
151
server.EntryGroupNew()),
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avahi.DBUS_INTERFACE_ENTRY_GROUP)
153
group.connect_to_signal('StateChanged',
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entry_group_state_changed)
177
if self.group is None:
178
self.group = dbus.Interface(
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self.bus.get_object(avahi.DBUS_NAME,
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self.server.EntryGroupNew()),
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avahi.DBUS_INTERFACE_ENTRY_GROUP)
182
self.group.connect_to_signal('StateChanged',
183
self
184
.entry_group_state_changed)
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185
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
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service.name, service.type)
157
group.AddService(
158
self.interface, # interface
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avahi.PROTO_INET6, # protocol
160
dbus.UInt32(0), # flags
161
self.name, self.type,
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self.domain, self.host,
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dbus.UInt16(self.port),
164
avahi.string_array_to_txt_array(self.TXT))
165
group.Commit()
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# From the Avahi example code:
168
group = None # our entry group
169
# End of Avahi example code
186
self.name, self.type)
187
self.group.AddService(
188
self.interface,
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self.protocol,
190
dbus.UInt32(0), # flags
191
self.name, self.type,
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self.domain, self.host,
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dbus.UInt16(self.port),
194
avahi.string_array_to_txt_array(self.TXT))
195
self.group.Commit()
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def entry_group_state_changed(self, state, error):
197
"""Derived from the Avahi example code"""
198
logger.debug(u"Avahi state change: %i", state)
199
200
if state == avahi.ENTRY_GROUP_ESTABLISHED:
201
logger.debug(u"Zeroconf service established.")
202
elif state == avahi.ENTRY_GROUP_COLLISION:
203
logger.warning(u"Zeroconf service name collision.")
204
self.rename()
205
elif state == avahi.ENTRY_GROUP_FAILURE:
206
logger.critical(u"Avahi: Error in group state changed %s",
207
unicode(error))
208
raise AvahiGroupError(u"State changed: %s"
209
% unicode(error))
210
def cleanup(self):
211
"""Derived from the Avahi example code"""
212
if self.group is not None:
213
self.group.Free()
214
self.group = None
215
def server_state_changed(self, state):
216
"""Derived from the Avahi example code"""
217
if state == avahi.SERVER_COLLISION:
218
logger.error(u"Zeroconf server name collision")
219
self.remove()
220
elif state == avahi.SERVER_RUNNING:
221
self.add()
222
def activate(self):
223
"""Derived from the Avahi example code"""
224
if self.server is None:
225
self.server = dbus.Interface(
226
self.bus.get_object(avahi.DBUS_NAME,
227
avahi.DBUS_PATH_SERVER),
228
avahi.DBUS_INTERFACE_SERVER)
229
self.server.connect_to_signal(u"StateChanged",
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self.server_state_changed)
231
self.server_state_changed(self.server.GetState())
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172
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class Client(object):
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"""A representation of a client host served by this server.
236
174
237
Attributes:
175
name: string; from the config file, used in log messages
238
name: string; from the config file, used in log messages and
239
D-Bus identifiers
176
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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
179
host: string; 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
182
timeout: datetime.timedelta(); How long from last_checked_ok
183
until this client is invalid
184
interval: datetime.timedelta(); How often to start a new checker
185
stop_hook: If set, called by stop() as stop_hook(self)
186
checker: subprocess.Popen(); a running checker process used
187
to see if the client lives.
188
'None' if no process is running.
242
secret: bytestring; sent verbatim (over TLS) to client
243
host: string; available for use by the checker command
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created: datetime.datetime(); (UTC) object creation
245
last_enabled: datetime.datetime(); (UTC)
246
enabled: bool()
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last_checked_ok: datetime.datetime(); (UTC) or None
248
timeout: datetime.timedelta(); How long from last_checked_ok
249
until this client is disabled
250
interval: datetime.timedelta(); How often to start a new checker
251
disable_hook: If set, called by disable() as disable_hook(self)
252
checker: subprocess.Popen(); a running checker process used
253
to see if the client lives.
254
'None' if no process is running.
189
255
checker_initiator_tag: a gobject event source tag, or None
190
stop_initiator_tag: - '' -
256
disable_initiator_tag: - '' -
191
257
checker_callback_tag: - '' -
192
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checker_command: string; External command which is run to check if
193
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client lives. %() expansions are done at
194
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runtime with vars(self) as dict, so that for
195
261
instance %(name)s can be used in the command.
196
Private attibutes:
197
_timeout: Real variable for 'timeout'
198
_interval: Real variable for 'interval'
199
_timeout_milliseconds: Used when calling gobject.timeout_add()
200
_interval_milliseconds: - '' -
262
current_checker_command: string; current running checker_command
263
approved_delay: datetime.timedelta(); Time to wait for approval
264
_approved: bool(); 'None' if not yet approved/disapproved
265
approved_duration: datetime.timedelta(); Duration of one approval
201
266
"""
202
def _set_timeout(self, timeout):
203
"Setter function for 'timeout' attribute"
204
self._timeout = timeout
205
self._timeout_milliseconds = ((self.timeout.days
206
* 24 * 60 * 60 * 1000)
207
+ (self.timeout.seconds * 1000)
208
+ (self.timeout.microseconds
209
// 1000))
210
timeout = property(lambda self: self._timeout,
211
_set_timeout)
212
del _set_timeout
213
def _set_interval(self, interval):
214
"Setter function for 'interval' attribute"
215
self._interval = interval
216
self._interval_milliseconds = ((self.interval.days
217
* 24 * 60 * 60 * 1000)
218
+ (self.interval.seconds
219
* 1000)
220
+ (self.interval.microseconds
221
// 1000))
222
interval = property(lambda self: self._interval,
223
_set_interval)
224
del _set_interval
225
def __init__(self, name = None, stop_hook=None, config={}):
267
268
@staticmethod
269
def _timedelta_to_milliseconds(td):
270
"Convert a datetime.timedelta() to milliseconds"
271
return ((td.days * 24 * 60 * 60 * 1000)
272
+ (td.seconds * 1000)
273
+ (td.microseconds // 1000))
274
275
def timeout_milliseconds(self):
276
"Return the 'timeout' attribute in milliseconds"
277
return self._timedelta_to_milliseconds(self.timeout)
278
279
def interval_milliseconds(self):
280
"Return the 'interval' attribute in milliseconds"
281
return self._timedelta_to_milliseconds(self.interval)
282
283
def approved_delay_milliseconds(self):
284
return self._timedelta_to_milliseconds(self.approved_delay)
285
286
def __init__(self, name = None, disable_hook=None, config=None):
226
287
"""Note: the 'checker' key in 'config' sets the
227
288
'checker_command' attribute and *not* the 'checker'
228
289
attribute."""
229
290
self.name = name
291
if config is None:
292
config = {}
230
293
logger.debug(u"Creating client %r", self.name)
231
294
# Uppercase and remove spaces from fingerprint for later
232
295
# comparison purposes with return value from the fingerprint()
233
296
# function
234
self.fingerprint = config["fingerprint"].upper()\
235
.replace(u" ", u"")
297
self.fingerprint = (config[u"fingerprint"].upper()
298
.replace(u" ", u""))
236
299
logger.debug(u" Fingerprint: %s", self.fingerprint)
237
if "secret" in config:
238
self.secret = config["secret"].decode(u"base64")
239
elif "secfile" in config:
240
sf = open(config["secfile"])
241
self.secret = sf.read()
242
sf.close()
300
if u"secret" in config:
301
self.secret = config[u"secret"].decode(u"base64")
302
elif u"secfile" in config:
303
with open(os.path.expanduser(os.path.expandvars
304
(config[u"secfile"])),
305
"rb") as secfile:
306
self.secret = secfile.read()
243
307
else:
308
#XXX Need to allow secret on demand!
244
309
raise TypeError(u"No secret or secfile for client %s"
245
310
% self.name)
246
self.host = config.get("host", "")
247
self.created = datetime.datetime.now()
311
self.host = config.get(u"host", u"")
312
self.created = datetime.datetime.utcnow()
313
self.enabled = False
314
self.last_enabled = None
248
315
self.last_checked_ok = None
249
self.timeout = string_to_delta(config["timeout"])
250
self.interval = string_to_delta(config["interval"])
251
self.stop_hook = stop_hook
316
self.timeout = string_to_delta(config[u"timeout"])
317
self.interval = string_to_delta(config[u"interval"])
318
self.disable_hook = disable_hook
252
319
self.checker = None
253
320
self.checker_initiator_tag = None
254
self.stop_initiator_tag = None
321
self.disable_initiator_tag = None
255
322
self.checker_callback_tag = None
256
self.check_command = config["checker"]
257
def start(self):
323
self.checker_command = config[u"checker"]
324
self.current_checker_command = None
325
self.last_connect = None
326
self.approvals_pending = 0
327
self._approved = None
328
self.approved_by_default = config.get(u"approved_by_default",
329
False)
330
self.approved_delay = string_to_delta(
331
config[u"approved_delay"])
332
self.approved_duration = string_to_delta(
333
config[u"approved_duration"])
334
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
335
336
def send_changedstate(self):
337
self.changedstate.acquire()
338
self.changedstate.notify_all()
339
self.changedstate.release()
340
341
def enable(self):
258
342
"""Start this client's checker and timeout hooks"""
343
if getattr(self, u"enabled", False):
344
# Already enabled
345
return
346
self.send_changedstate()
347
self.last_enabled = datetime.datetime.utcnow()
259
348
# Schedule a new checker to be started an 'interval' from now,
260
349
# and every interval from then on.
261
self.checker_initiator_tag = gobject.timeout_add\
262
(self._interval_milliseconds,
263
self.start_checker)
350
self.checker_initiator_tag = (gobject.timeout_add
351
(self.interval_milliseconds(),
352
self.start_checker))
353
# Schedule a disable() when 'timeout' has passed
354
self.disable_initiator_tag = (gobject.timeout_add
355
(self.timeout_milliseconds(),
356
self.disable))
357
self.enabled = True
264
358
# Also start a new checker *right now*.
265
359
self.start_checker()
266
# Schedule a stop() when 'timeout' has passed
267
self.stop_initiator_tag = gobject.timeout_add\
268
(self._timeout_milliseconds,
269
self.stop)
270
def stop(self):
271
"""Stop this client.
272
The possibility that a client might be restarted is left open,
273
but not currently used."""
274
# If this client doesn't have a secret, it is already stopped.
275
if hasattr(self, "secret") and self.secret:
276
logger.info(u"Stopping client %s", self.name)
277
self.secret = None
278
else:
360
361
def disable(self, quiet=True):
362
"""Disable this client."""
363
if not getattr(self, "enabled", False):
279
364
return False
280
if getattr(self, "stop_initiator_tag", False):
281
gobject.source_remove(self.stop_initiator_tag)
282
self.stop_initiator_tag = None
283
if getattr(self, "checker_initiator_tag", False):
365
if not quiet:
366
self.send_changedstate()
367
if not quiet:
368
logger.info(u"Disabling client %s", self.name)
369
if getattr(self, u"disable_initiator_tag", False):
370
gobject.source_remove(self.disable_initiator_tag)
371
self.disable_initiator_tag = None
372
if getattr(self, u"checker_initiator_tag", False):
284
373
gobject.source_remove(self.checker_initiator_tag)
285
374
self.checker_initiator_tag = None
286
375
self.stop_checker()
287
if self.stop_hook:
288
self.stop_hook(self)
376
if self.disable_hook:
377
self.disable_hook(self)
378
self.enabled = False
289
379
# Do not run this again if called by a gobject.timeout_add
290
380
return False
381
291
382
def __del__(self):
292
self.stop_hook = None
293
self.stop()
294
def checker_callback(self, pid, condition):
383
self.disable_hook = None
384
self.disable()
385
386
def checker_callback(self, pid, condition, command):
295
387
"""The checker has completed, so take appropriate actions."""
296
now = datetime.datetime.now()
297
388
self.checker_callback_tag = None
298
389
self.checker = None
299
if os.WIFEXITED(condition) \
300
and (os.WEXITSTATUS(condition) == 0):
301
logger.info(u"Checker for %(name)s succeeded",
302
vars(self))
303
self.last_checked_ok = now
304
gobject.source_remove(self.stop_initiator_tag)
305
self.stop_initiator_tag = gobject.timeout_add\
306
(self._timeout_milliseconds,
307
self.stop)
308
elif not os.WIFEXITED(condition):
390
if os.WIFEXITED(condition):
391
exitstatus = os.WEXITSTATUS(condition)
392
if exitstatus == 0:
393
logger.info(u"Checker for %(name)s succeeded",
394
vars(self))
395
self.checked_ok()
396
else:
397
logger.info(u"Checker for %(name)s failed",
398
vars(self))
399
else:
309
400
logger.warning(u"Checker for %(name)s crashed?",
310
401
vars(self))
311
else:
312
logger.info(u"Checker for %(name)s failed",
313
vars(self))
402
403
def checked_ok(self):
404
"""Bump up the timeout for this client.
405
406
This should only be called when the client has been seen,
407
alive and well.
408
"""
409
self.last_checked_ok = datetime.datetime.utcnow()
410
gobject.source_remove(self.disable_initiator_tag)
411
self.disable_initiator_tag = (gobject.timeout_add
412
(self.timeout_milliseconds(),
413
self.disable))
414
314
415
def start_checker(self):
315
416
"""Start a new checker subprocess if one is not running.
417
316
418
If a checker already exists, leave it running and do
317
419
nothing."""
318
420
# The reason for not killing a running checker is that if we
321
423
# client would inevitably timeout, since no checker would get
322
424
# a chance to run to completion. If we instead leave running
323
425
# checkers alone, the checker would have to take more time
324
# than 'timeout' for the client to be declared invalid, which
325
# is as it should be.
426
# than 'timeout' for the client to be disabled, which is as it
427
# should be.
428
429
# If a checker exists, make sure it is not a zombie
430
try:
431
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
432
except (AttributeError, OSError), error:
433
if (isinstance(error, OSError)
434
and error.errno != errno.ECHILD):
435
raise error
436
else:
437
if pid:
438
logger.warning(u"Checker was a zombie")
439
gobject.source_remove(self.checker_callback_tag)
440
self.checker_callback(pid, status,
441
self.current_checker_command)
442
# Start a new checker if needed
326
443
if self.checker is None:
327
444
try:
328
# In case check_command has exactly one % operator
329
command = self.check_command % self.host
445
# In case checker_command has exactly one % operator
446
command = self.checker_command % self.host
330
447
except TypeError:
331
448
# Escape attributes for the shell
332
escaped_attrs = dict((key, re.escape(str(val)))
449
escaped_attrs = dict((key,
450
re.escape(unicode(str(val),
451
errors=
452
u'replace')))
333
453
for key, val in
334
454
vars(self).iteritems())
335
455
try:
336
command = self.check_command % escaped_attrs
456
command = self.checker_command % escaped_attrs
337
457
except TypeError, error:
338
458
logger.error(u'Could not format string "%s":'
339
u' %s', self.check_command, error)
459
u' %s', self.checker_command, error)
340
460
return True # Try again later
461
self.current_checker_command = command
341
462
try:
342
463
logger.info(u"Starting checker %r for %s",
343
464
command, self.name)
347
468
# always replaced by /dev/null.)
348
469
self.checker = subprocess.Popen(command,
349
470
close_fds=True,
350
shell=True, cwd="/")
351
self.checker_callback_tag = gobject.child_watch_add\
352
(self.checker.pid,
353
self.checker_callback)
471
shell=True, cwd=u"/")
472
self.checker_callback_tag = (gobject.child_watch_add
473
(self.checker.pid,
474
self.checker_callback,
475
data=command))
476
# The checker may have completed before the gobject
477
# watch was added. Check for this.
478
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
479
if pid:
480
gobject.source_remove(self.checker_callback_tag)
481
self.checker_callback(pid, status, command)
354
482
except OSError, error:
355
483
logger.error(u"Failed to start subprocess: %s",
356
484
error)
357
485
# Re-run this periodically if run by gobject.timeout_add
358
486
return True
487
359
488
def stop_checker(self):
360
489
"""Force the checker process, if any, to stop."""
361
490
if self.checker_callback_tag:
362
491
gobject.source_remove(self.checker_callback_tag)
363
492
self.checker_callback_tag = None
364
if getattr(self, "checker", None) is None:
493
if getattr(self, u"checker", None) is None:
365
494
return
366
495
logger.debug(u"Stopping checker for %(name)s", vars(self))
367
496
try:
368
497
os.kill(self.checker.pid, signal.SIGTERM)
369
#os.sleep(0.5)
498
#time.sleep(0.5)
370
499
#if self.checker.poll() is None:
371
500
# os.kill(self.checker.pid, signal.SIGKILL)
372
501
except OSError, error:
373
502
if error.errno != errno.ESRCH: # No such process
374
503
raise
375
504
self.checker = None
376
def still_valid(self):
377
"""Has the timeout not yet passed for this client?"""
378
now = datetime.datetime.now()
505
506
def dbus_service_property(dbus_interface, signature=u"v",
507
access=u"readwrite", byte_arrays=False):
508
"""Decorators for marking methods of a DBusObjectWithProperties to
509
become properties on the D-Bus.
510
511
The decorated method will be called with no arguments by "Get"
512
and with one argument by "Set".
513
514
The parameters, where they are supported, are the same as
515
dbus.service.method, except there is only "signature", since the
516
type from Get() and the type sent to Set() is the same.
517
"""
518
# Encoding deeply encoded byte arrays is not supported yet by the
519
# "Set" method, so we fail early here:
520
if byte_arrays and signature != u"ay":
521
raise ValueError(u"Byte arrays not supported for non-'ay'"
522
u" signature %r" % signature)
523
def decorator(func):
524
func._dbus_is_property = True
525
func._dbus_interface = dbus_interface
526
func._dbus_signature = signature
527
func._dbus_access = access
528
func._dbus_name = func.__name__
529
if func._dbus_name.endswith(u"_dbus_property"):
530
func._dbus_name = func._dbus_name[:-14]
531
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
532
return func
533
return decorator
534
535
536
class DBusPropertyException(dbus.exceptions.DBusException):
537
"""A base class for D-Bus property-related exceptions
538
"""
539
def __unicode__(self):
540
return unicode(str(self))
541
542
543
class DBusPropertyAccessException(DBusPropertyException):
544
"""A property's access permissions disallows an operation.
545
"""
546
pass
547
548
549
class DBusPropertyNotFound(DBusPropertyException):
550
"""An attempt was made to access a non-existing property.
551
"""
552
pass
553
554
555
class DBusObjectWithProperties(dbus.service.Object):
556
"""A D-Bus object with properties.
557
558
Classes inheriting from this can use the dbus_service_property
559
decorator to expose methods as D-Bus properties. It exposes the
560
standard Get(), Set(), and GetAll() methods on the D-Bus.
561
"""
562
563
@staticmethod
564
def _is_dbus_property(obj):
565
return getattr(obj, u"_dbus_is_property", False)
566
567
def _get_all_dbus_properties(self):
568
"""Returns a generator of (name, attribute) pairs
569
"""
570
return ((prop._dbus_name, prop)
571
for name, prop in
572
inspect.getmembers(self, self._is_dbus_property))
573
574
def _get_dbus_property(self, interface_name, property_name):
575
"""Returns a bound method if one exists which is a D-Bus
576
property with the specified name and interface.
577
"""
578
for name in (property_name,
579
property_name + u"_dbus_property"):
580
prop = getattr(self, name, None)
581
if (prop is None
582
or not self._is_dbus_property(prop)
583
or prop._dbus_name != property_name
584
or (interface_name and prop._dbus_interface
585
and interface_name != prop._dbus_interface)):
586
continue
587
return prop
588
# No such property
589
raise DBusPropertyNotFound(self.dbus_object_path + u":"
590
+ interface_name + u"."
591
+ property_name)
592
593
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
594
out_signature=u"v")
595
def Get(self, interface_name, property_name):
596
"""Standard D-Bus property Get() method, see D-Bus standard.
597
"""
598
prop = self._get_dbus_property(interface_name, property_name)
599
if prop._dbus_access == u"write":
600
raise DBusPropertyAccessException(property_name)
601
value = prop()
602
if not hasattr(value, u"variant_level"):
603
return value
604
return type(value)(value, variant_level=value.variant_level+1)
605
606
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
607
def Set(self, interface_name, property_name, value):
608
"""Standard D-Bus property Set() method, see D-Bus standard.
609
"""
610
prop = self._get_dbus_property(interface_name, property_name)
611
if prop._dbus_access == u"read":
612
raise DBusPropertyAccessException(property_name)
613
if prop._dbus_get_args_options[u"byte_arrays"]:
614
# The byte_arrays option is not supported yet on
615
# signatures other than "ay".
616
if prop._dbus_signature != u"ay":
617
raise ValueError
618
value = dbus.ByteArray(''.join(unichr(byte)
619
for byte in value))
620
prop(value)
621
622
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
623
out_signature=u"a{sv}")
624
def GetAll(self, interface_name):
625
"""Standard D-Bus property GetAll() method, see D-Bus
626
standard.
627
628
Note: Will not include properties with access="write".
629
"""
630
all = {}
631
for name, prop in self._get_all_dbus_properties():
632
if (interface_name
633
and interface_name != prop._dbus_interface):
634
# Interface non-empty but did not match
635
continue
636
# Ignore write-only properties
637
if prop._dbus_access == u"write":
638
continue
639
value = prop()
640
if not hasattr(value, u"variant_level"):
641
all[name] = value
642
continue
643
all[name] = type(value)(value, variant_level=
644
value.variant_level+1)
645
return dbus.Dictionary(all, signature=u"sv")
646
647
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
648
out_signature=u"s",
649
path_keyword='object_path',
650
connection_keyword='connection')
651
def Introspect(self, object_path, connection):
652
"""Standard D-Bus method, overloaded to insert property tags.
653
"""
654
xmlstring = dbus.service.Object.Introspect(self, object_path,
655
connection)
656
try:
657
document = xml.dom.minidom.parseString(xmlstring)
658
def make_tag(document, name, prop):
659
e = document.createElement(u"property")
660
e.setAttribute(u"name", name)
661
e.setAttribute(u"type", prop._dbus_signature)
662
e.setAttribute(u"access", prop._dbus_access)
663
return e
664
for if_tag in document.getElementsByTagName(u"interface"):
665
for tag in (make_tag(document, name, prop)
666
for name, prop
667
in self._get_all_dbus_properties()
668
if prop._dbus_interface
669
== if_tag.getAttribute(u"name")):
670
if_tag.appendChild(tag)
671
# Add the names to the return values for the
672
# "org.freedesktop.DBus.Properties" methods
673
if (if_tag.getAttribute(u"name")
674
== u"org.freedesktop.DBus.Properties"):
675
for cn in if_tag.getElementsByTagName(u"method"):
676
if cn.getAttribute(u"name") == u"Get":
677
for arg in cn.getElementsByTagName(u"arg"):
678
if (arg.getAttribute(u"direction")
679
== u"out"):
680
arg.setAttribute(u"name", u"value")
681
elif cn.getAttribute(u"name") == u"GetAll":
682
for arg in cn.getElementsByTagName(u"arg"):
683
if (arg.getAttribute(u"direction")
684
== u"out"):
685
arg.setAttribute(u"name", u"props")
686
xmlstring = document.toxml(u"utf-8")
687
document.unlink()
688
except (AttributeError, xml.dom.DOMException,
689
xml.parsers.expat.ExpatError), error:
690
logger.error(u"Failed to override Introspection method",
691
error)
692
return xmlstring
693
694
695
class ClientDBus(Client, DBusObjectWithProperties):
696
"""A Client class using D-Bus
697
698
Attributes:
699
dbus_object_path: dbus.ObjectPath
700
bus: dbus.SystemBus()
701
"""
702
# dbus.service.Object doesn't use super(), so we can't either.
703
704
def __init__(self, bus = None, *args, **kwargs):
705
self.bus = bus
706
Client.__init__(self, *args, **kwargs)
707
# Only now, when this client is initialized, can it show up on
708
# the D-Bus
709
self.dbus_object_path = (dbus.ObjectPath
710
(u"/clients/"
711
+ self.name.replace(u".", u"_")))
712
DBusObjectWithProperties.__init__(self, self.bus,
713
self.dbus_object_path)
714
715
@staticmethod
716
def _datetime_to_dbus(dt, variant_level=0):
717
"""Convert a UTC datetime.datetime() to a D-Bus type."""
718
return dbus.String(dt.isoformat(),
719
variant_level=variant_level)
720
721
def enable(self):
722
oldstate = getattr(self, u"enabled", False)
723
r = Client.enable(self)
724
if oldstate != self.enabled:
725
# Emit D-Bus signals
726
self.PropertyChanged(dbus.String(u"enabled"),
727
dbus.Boolean(True, variant_level=1))
728
self.PropertyChanged(
729
dbus.String(u"last_enabled"),
730
self._datetime_to_dbus(self.last_enabled,
731
variant_level=1))
732
return r
733
734
def disable(self, quiet = False):
735
oldstate = getattr(self, u"enabled", False)
736
r = Client.disable(self, quiet=quiet)
737
if not quiet and oldstate != self.enabled:
738
# Emit D-Bus signal
739
self.PropertyChanged(dbus.String(u"enabled"),
740
dbus.Boolean(False, variant_level=1))
741
return r
742
743
def __del__(self, *args, **kwargs):
744
try:
745
self.remove_from_connection()
746
except LookupError:
747
pass
748
if hasattr(DBusObjectWithProperties, u"__del__"):
749
DBusObjectWithProperties.__del__(self, *args, **kwargs)
750
Client.__del__(self, *args, **kwargs)
751
752
def checker_callback(self, pid, condition, command,
753
*args, **kwargs):
754
self.checker_callback_tag = None
755
self.checker = None
756
# Emit D-Bus signal
757
self.PropertyChanged(dbus.String(u"checker_running"),
758
dbus.Boolean(False, variant_level=1))
759
if os.WIFEXITED(condition):
760
exitstatus = os.WEXITSTATUS(condition)
761
# Emit D-Bus signal
762
self.CheckerCompleted(dbus.Int16(exitstatus),
763
dbus.Int64(condition),
764
dbus.String(command))
765
else:
766
# Emit D-Bus signal
767
self.CheckerCompleted(dbus.Int16(-1),
768
dbus.Int64(condition),
769
dbus.String(command))
770
771
return Client.checker_callback(self, pid, condition, command,
772
*args, **kwargs)
773
774
def checked_ok(self, *args, **kwargs):
775
r = Client.checked_ok(self, *args, **kwargs)
776
# Emit D-Bus signal
777
self.PropertyChanged(
778
dbus.String(u"last_checked_ok"),
779
(self._datetime_to_dbus(self.last_checked_ok,
780
variant_level=1)))
781
return r
782
783
def start_checker(self, *args, **kwargs):
784
old_checker = self.checker
785
if self.checker is not None:
786
old_checker_pid = self.checker.pid
787
else:
788
old_checker_pid = None
789
r = Client.start_checker(self, *args, **kwargs)
790
# Only if new checker process was started
791
if (self.checker is not None
792
and old_checker_pid != self.checker.pid):
793
# Emit D-Bus signal
794
self.CheckerStarted(self.current_checker_command)
795
self.PropertyChanged(
796
dbus.String(u"checker_running"),
797
dbus.Boolean(True, variant_level=1))
798
return r
799
800
def stop_checker(self, *args, **kwargs):
801
old_checker = getattr(self, u"checker", None)
802
r = Client.stop_checker(self, *args, **kwargs)
803
if (old_checker is not None
804
and getattr(self, u"checker", None) is None):
805
self.PropertyChanged(dbus.String(u"checker_running"),
806
dbus.Boolean(False, variant_level=1))
807
return r
808
809
def _reset_approved(self):
810
self._approved = None
811
return False
812
813
def approve(self, value=True):
814
self._approved = value
815
gobject.timeout_add(self._timedelta_to_milliseconds(self.approved_duration, self._reset_approved))
816
817
def approved_pending(self):
818
return self.approvals_pending > 0
819
820
821
## D-Bus methods, signals & properties
822
_interface = u"se.bsnet.fukt.Mandos.Client"
823
824
## Signals
825
826
# CheckerCompleted - signal
827
@dbus.service.signal(_interface, signature=u"nxs")
828
def CheckerCompleted(self, exitcode, waitstatus, command):
829
"D-Bus signal"
830
pass
831
832
# CheckerStarted - signal
833
@dbus.service.signal(_interface, signature=u"s")
834
def CheckerStarted(self, command):
835
"D-Bus signal"
836
pass
837
838
# PropertyChanged - signal
839
@dbus.service.signal(_interface, signature=u"sv")
840
def PropertyChanged(self, property, value):
841
"D-Bus signal"
842
pass
843
844
# GotSecret - signal
845
@dbus.service.signal(_interface)
846
def GotSecret(self):
847
"D-Bus signal"
848
pass
849
850
# Rejected - signal
851
@dbus.service.signal(_interface, signature=u"s")
852
def Rejected(self, reason):
853
"D-Bus signal"
854
pass
855
856
# NeedApproval - signal
857
@dbus.service.signal(_interface, signature=u"db")
858
def NeedApproval(self, timeout, default):
859
"D-Bus signal"
860
pass
861
862
## Methods
863
864
# Approve - method
865
@dbus.service.method(_interface, in_signature=u"b")
866
def Approve(self, value):
867
self.approve(value)
868
869
# CheckedOK - method
870
@dbus.service.method(_interface)
871
def CheckedOK(self):
872
return self.checked_ok()
873
874
# Enable - method
875
@dbus.service.method(_interface)
876
def Enable(self):
877
"D-Bus method"
878
self.enable()
879
880
# StartChecker - method
881
@dbus.service.method(_interface)
882
def StartChecker(self):
883
"D-Bus method"
884
self.start_checker()
885
886
# Disable - method
887
@dbus.service.method(_interface)
888
def Disable(self):
889
"D-Bus method"
890
self.disable()
891
892
# StopChecker - method
893
@dbus.service.method(_interface)
894
def StopChecker(self):
895
self.stop_checker()
896
897
## Properties
898
899
# approved_pending - property
900
@dbus_service_property(_interface, signature=u"b", access=u"read")
901
def approved_pending_dbus_property(self):
902
return dbus.Boolean(self.approved_pending())
903
904
# approved_by_default - property
905
@dbus_service_property(_interface, signature=u"b",
906
access=u"readwrite")
907
def approved_by_default_dbus_property(self):
908
return dbus.Boolean(self.approved_by_default)
909
910
# approved_delay - property
911
@dbus_service_property(_interface, signature=u"t",
912
access=u"readwrite")
913
def approved_delay_dbus_property(self):
914
return dbus.UInt64(self.approved_delay_milliseconds())
915
916
# approved_duration - property
917
@dbus_service_property(_interface, signature=u"t",
918
access=u"readwrite")
919
def approved_duration_dbus_property(self):
920
return dbus.UInt64(self._timedelta_to_milliseconds(
921
self.approved_duration))
922
923
# name - property
924
@dbus_service_property(_interface, signature=u"s", access=u"read")
925
def name_dbus_property(self):
926
return dbus.String(self.name)
927
928
# fingerprint - property
929
@dbus_service_property(_interface, signature=u"s", access=u"read")
930
def fingerprint_dbus_property(self):
931
return dbus.String(self.fingerprint)
932
933
# host - property
934
@dbus_service_property(_interface, signature=u"s",
935
access=u"readwrite")
936
def host_dbus_property(self, value=None):
937
if value is None: # get
938
return dbus.String(self.host)
939
self.host = value
940
# Emit D-Bus signal
941
self.PropertyChanged(dbus.String(u"host"),
942
dbus.String(value, variant_level=1))
943
944
# created - property
945
@dbus_service_property(_interface, signature=u"s", access=u"read")
946
def created_dbus_property(self):
947
return dbus.String(self._datetime_to_dbus(self.created))
948
949
# last_enabled - property
950
@dbus_service_property(_interface, signature=u"s", access=u"read")
951
def last_enabled_dbus_property(self):
952
if self.last_enabled is None:
953
return dbus.String(u"")
954
return dbus.String(self._datetime_to_dbus(self.last_enabled))
955
956
# enabled - property
957
@dbus_service_property(_interface, signature=u"b",
958
access=u"readwrite")
959
def enabled_dbus_property(self, value=None):
960
if value is None: # get
961
return dbus.Boolean(self.enabled)
962
if value:
963
self.enable()
964
else:
965
self.disable()
966
967
# last_checked_ok - property
968
@dbus_service_property(_interface, signature=u"s",
969
access=u"readwrite")
970
def last_checked_ok_dbus_property(self, value=None):
971
if value is not None:
972
self.checked_ok()
973
return
379
974
if self.last_checked_ok is None:
380
return now < (self.created + self.timeout)
381
else:
382
return now < (self.last_checked_ok + self.timeout)
383
384
385
def peer_certificate(session):
386
"Return the peer's OpenPGP certificate as a bytestring"
387
# If not an OpenPGP certificate...
388
if gnutls.library.functions.gnutls_certificate_type_get\
389
(session._c_object) \
390
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
391
# ...do the normal thing
392
return session.peer_certificate
393
list_size = ctypes.c_uint()
394
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
395
(session._c_object, ctypes.byref(list_size))
396
if list_size.value == 0:
397
return None
398
cert = cert_list[0]
399
return ctypes.string_at(cert.data, cert.size)
400
401
402
def fingerprint(openpgp):
403
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
404
# New GnuTLS "datum" with the OpenPGP public key
405
datum = gnutls.library.types.gnutls_datum_t\
406
(ctypes.cast(ctypes.c_char_p(openpgp),
407
ctypes.POINTER(ctypes.c_ubyte)),
408
ctypes.c_uint(len(openpgp)))
409
# New empty GnuTLS certificate
410
crt = gnutls.library.types.gnutls_openpgp_crt_t()
411
gnutls.library.functions.gnutls_openpgp_crt_init\
412
(ctypes.byref(crt))
413
# Import the OpenPGP public key into the certificate
414
gnutls.library.functions.gnutls_openpgp_crt_import\
415
(crt, ctypes.byref(datum),
416
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
417
# Verify the self signature in the key
418
crtverify = ctypes.c_uint();
419
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
420
(crt, 0, ctypes.byref(crtverify))
421
if crtverify.value != 0:
422
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
423
raise gnutls.errors.CertificateSecurityError("Verify failed")
424
# New buffer for the fingerprint
425
buffer = ctypes.create_string_buffer(20)
426
buffer_length = ctypes.c_size_t()
427
# Get the fingerprint from the certificate into the buffer
428
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
429
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
430
# Deinit the certificate
431
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
432
# Convert the buffer to a Python bytestring
433
fpr = ctypes.string_at(buffer, buffer_length.value)
434
# Convert the bytestring to hexadecimal notation
435
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
436
return hex_fpr
437
438
439
class tcp_handler(SocketServer.BaseRequestHandler, object):
440
"""A TCP request handler class.
441
Instantiated by IPv6_TCPServer for each request to handle it.
975
return dbus.String(u"")
976
return dbus.String(self._datetime_to_dbus(self
977
.last_checked_ok))
978
979
# timeout - property
980
@dbus_service_property(_interface, signature=u"t",
981
access=u"readwrite")
982
def timeout_dbus_property(self, value=None):
983
if value is None: # get
984
return dbus.UInt64(self.timeout_milliseconds())
985
self.timeout = datetime.timedelta(0, 0, 0, value)
986
# Emit D-Bus signal
987
self.PropertyChanged(dbus.String(u"timeout"),
988
dbus.UInt64(value, variant_level=1))
989
if getattr(self, u"disable_initiator_tag", None) is None:
990
return
991
# Reschedule timeout
992
gobject.source_remove(self.disable_initiator_tag)
993
self.disable_initiator_tag = None
994
time_to_die = (self.
995
_timedelta_to_milliseconds((self
996
.last_checked_ok
997
+ self.timeout)
998
- datetime.datetime
999
.utcnow()))
1000
if time_to_die <= 0:
1001
# The timeout has passed
1002
self.disable()
1003
else:
1004
self.disable_initiator_tag = (gobject.timeout_add
1005
(time_to_die, self.disable))
1006
1007
# interval - property
1008
@dbus_service_property(_interface, signature=u"t",
1009
access=u"readwrite")
1010
def interval_dbus_property(self, value=None):
1011
if value is None: # get
1012
return dbus.UInt64(self.interval_milliseconds())
1013
self.interval = datetime.timedelta(0, 0, 0, value)
1014
# Emit D-Bus signal
1015
self.PropertyChanged(dbus.String(u"interval"),
1016
dbus.UInt64(value, variant_level=1))
1017
if getattr(self, u"checker_initiator_tag", None) is None:
1018
return
1019
# Reschedule checker run
1020
gobject.source_remove(self.checker_initiator_tag)
1021
self.checker_initiator_tag = (gobject.timeout_add
1022
(value, self.start_checker))
1023
self.start_checker() # Start one now, too
1024
1025
# checker - property
1026
@dbus_service_property(_interface, signature=u"s",
1027
access=u"readwrite")
1028
def checker_dbus_property(self, value=None):
1029
if value is None: # get
1030
return dbus.String(self.checker_command)
1031
self.checker_command = value
1032
# Emit D-Bus signal
1033
self.PropertyChanged(dbus.String(u"checker"),
1034
dbus.String(self.checker_command,
1035
variant_level=1))
1036
1037
# checker_running - property
1038
@dbus_service_property(_interface, signature=u"b",
1039
access=u"readwrite")
1040
def checker_running_dbus_property(self, value=None):
1041
if value is None: # get
1042
return dbus.Boolean(self.checker is not None)
1043
if value:
1044
self.start_checker()
1045
else:
1046
self.stop_checker()
1047
1048
# object_path - property
1049
@dbus_service_property(_interface, signature=u"o", access=u"read")
1050
def object_path_dbus_property(self):
1051
return self.dbus_object_path # is already a dbus.ObjectPath
1052
1053
# secret = property
1054
@dbus_service_property(_interface, signature=u"ay",
1055
access=u"write", byte_arrays=True)
1056
def secret_dbus_property(self, value):
1057
self.secret = str(value)
1058
1059
del _interface
1060
1061
1062
class ProxyClient(object):
1063
def __init__(self, child_pipe, fpr, address):
1064
self._pipe = child_pipe
1065
self._pipe.send(('init', fpr, address))
1066
if not self._pipe.recv():
1067
raise KeyError()
1068
1069
def __getattribute__(self, name):
1070
if(name == '_pipe'):
1071
return super(ProxyClient, self).__getattribute__(name)
1072
self._pipe.send(('getattr', name))
1073
data = self._pipe.recv()
1074
if data[0] == 'data':
1075
return data[1]
1076
if data[0] == 'function':
1077
def func(*args, **kwargs):
1078
self._pipe.send(('funcall', name, args, kwargs))
1079
return self._pipe.recv()[1]
1080
return func
1081
1082
def __setattr__(self, name, value):
1083
if(name == '_pipe'):
1084
return super(ProxyClient, self).__setattr__(name, value)
1085
self._pipe.send(('setattr', name, value))
1086
1087
1088
class ClientHandler(socketserver.BaseRequestHandler, object):
1089
"""A class to handle client connections.
1090
1091
Instantiated once for each connection to handle it.
442
1092
Note: This will run in its own forked process."""
443
1093
444
1094
def handle(self):
445
logger.info(u"TCP connection from: %s",
446
unicode(self.client_address))
447
session = gnutls.connection.ClientSession\
448
(self.request, gnutls.connection.X509Credentials())
449
450
line = self.request.makefile().readline()
451
logger.debug(u"Protocol version: %r", line)
452
try:
453
if int(line.strip().split()[0]) > 1:
454
raise RuntimeError
455
except (ValueError, IndexError, RuntimeError), error:
456
logger.error(u"Unknown protocol version: %s", error)
457
return
458
459
# Note: gnutls.connection.X509Credentials is really a generic
460
# GnuTLS certificate credentials object so long as no X.509
461
# keys are added to it. Therefore, we can use it here despite
462
# using OpenPGP certificates.
463
464
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
465
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
466
# "+DHE-DSS"))
467
priority = "NORMAL" # Fallback default, since this
468
# MUST be set.
469
if self.server.settings["priority"]:
470
priority = self.server.settings["priority"]
471
gnutls.library.functions.gnutls_priority_set_direct\
472
(session._c_object, priority, None);
473
474
try:
475
session.handshake()
476
except gnutls.errors.GNUTLSError, error:
477
logger.warning(u"Handshake failed: %s", error)
478
# Do not run session.bye() here: the session is not
479
# established. Just abandon the request.
480
return
481
try:
482
fpr = fingerprint(peer_certificate(session))
483
except (TypeError, gnutls.errors.GNUTLSError), error:
484
logger.warning(u"Bad certificate: %s", error)
485
session.bye()
486
return
487
logger.debug(u"Fingerprint: %s", fpr)
488
client = None
489
for c in self.server.clients:
490
if c.fingerprint == fpr:
491
client = c
492
break
493
if not client:
494
logger.warning(u"Client not found for fingerprint: %s",
495
fpr)
496
session.bye()
497
return
498
# Have to check if client.still_valid(), since it is possible
499
# that the client timed out while establishing the GnuTLS
500
# session.
501
if not client.still_valid():
502
logger.warning(u"Client %(name)s is invalid",
503
vars(client))
504
session.bye()
505
return
506
sent_size = 0
507
while sent_size < len(client.secret):
508
sent = session.send(client.secret[sent_size:])
509
logger.debug(u"Sent: %d, remaining: %d",
510
sent, len(client.secret)
511
- (sent_size + sent))
512
sent_size += sent
513
session.bye()
514
515
516
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
517
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1095
with contextlib.closing(self.server.child_pipe) as child_pipe:
1096
logger.info(u"TCP connection from: %s",
1097
unicode(self.client_address))
1098
logger.debug(u"Pipe FD: %d",
1099
self.server.child_pipe.fileno())
1100
1101
session = (gnutls.connection
1102
.ClientSession(self.request,
1103
gnutls.connection
1104
.X509Credentials()))
1105
1106
# Note: gnutls.connection.X509Credentials is really a
1107
# generic GnuTLS certificate credentials object so long as
1108
# no X.509 keys are added to it. Therefore, we can use it
1109
# here despite using OpenPGP certificates.
1110
1111
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1112
# u"+AES-256-CBC", u"+SHA1",
1113
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1114
# u"+DHE-DSS"))
1115
# Use a fallback default, since this MUST be set.
1116
priority = self.server.gnutls_priority
1117
if priority is None:
1118
priority = u"NORMAL"
1119
(gnutls.library.functions
1120
.gnutls_priority_set_direct(session._c_object,
1121
priority, None))
1122
1123
# Start communication using the Mandos protocol
1124
# Get protocol number
1125
line = self.request.makefile().readline()
1126
logger.debug(u"Protocol version: %r", line)
1127
try:
1128
if int(line.strip().split()[0]) > 1:
1129
raise RuntimeError
1130
except (ValueError, IndexError, RuntimeError), error:
1131
logger.error(u"Unknown protocol version: %s", error)
1132
return
1133
1134
# Start GnuTLS connection
1135
try:
1136
session.handshake()
1137
except gnutls.errors.GNUTLSError, error:
1138
logger.warning(u"Handshake failed: %s", error)
1139
# Do not run session.bye() here: the session is not
1140
# established. Just abandon the request.
1141
return
1142
logger.debug(u"Handshake succeeded")
1143
1144
approval_required = False
1145
try:
1146
try:
1147
fpr = self.fingerprint(self.peer_certificate
1148
(session))
1149
except (TypeError, gnutls.errors.GNUTLSError), error:
1150
logger.warning(u"Bad certificate: %s", error)
1151
return
1152
logger.debug(u"Fingerprint: %s", fpr)
1153
1154
try:
1155
client = ProxyClient(child_pipe, fpr,
1156
self.client_address)
1157
except KeyError:
1158
return
1159
1160
if client.approved_delay:
1161
delay = client.approved_delay
1162
client.approvals_pending += 1
1163
approval_required = True
1164
1165
while True:
1166
if not client.enabled:
1167
logger.warning(u"Client %s is disabled",
1168
client.name)
1169
if self.server.use_dbus:
1170
# Emit D-Bus signal
1171
client.Rejected("Disabled")
1172
return
1173
1174
if client._approved or not client.approved_delay:
1175
#We are approved or approval is disabled
1176
break
1177
elif client._approved is None:
1178
logger.info(u"Client %s need approval",
1179
client.name)
1180
if self.server.use_dbus:
1181
# Emit D-Bus signal
1182
client.NeedApproval(
1183
client.approved_delay_milliseconds(),
1184
client.approved_by_default)
1185
else:
1186
logger.warning(u"Client %s was not approved",
1187
client.name)
1188
if self.server.use_dbus:
1189
# Emit D-Bus signal
1190
client.Rejected("Disapproved")
1191
return
1192
1193
#wait until timeout or approved
1194
#x = float(client._timedelta_to_milliseconds(delay))
1195
time = datetime.datetime.now()
1196
client.changedstate.acquire()
1197
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1198
client.changedstate.release()
1199
time2 = datetime.datetime.now()
1200
if (time2 - time) >= delay:
1201
if not client.approved_by_default:
1202
logger.warning("Client %s timed out while"
1203
" waiting for approval",
1204
client.name)
1205
if self.server.use_dbus:
1206
# Emit D-Bus signal
1207
client.Rejected("Time out")
1208
return
1209
else:
1210
break
1211
else:
1212
delay -= time2 - time
1213
1214
sent_size = 0
1215
while sent_size < len(client.secret):
1216
# XXX handle session exception
1217
sent = session.send(client.secret[sent_size:])
1218
logger.debug(u"Sent: %d, remaining: %d",
1219
sent, len(client.secret)
1220
- (sent_size + sent))
1221
sent_size += sent
1222
1223
logger.info(u"Sending secret to %s", client.name)
1224
# bump the timeout as if seen
1225
client.checked_ok()
1226
if self.server.use_dbus:
1227
# Emit D-Bus signal
1228
client.GotSecret()
1229
1230
finally:
1231
if approval_required:
1232
client.approvals_pending -= 1
1233
session.bye()
1234
1235
@staticmethod
1236
def peer_certificate(session):
1237
"Return the peer's OpenPGP certificate as a bytestring"
1238
# If not an OpenPGP certificate...
1239
if (gnutls.library.functions
1240
.gnutls_certificate_type_get(session._c_object)
1241
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1242
# ...do the normal thing
1243
return session.peer_certificate
1244
list_size = ctypes.c_uint(1)
1245
cert_list = (gnutls.library.functions
1246
.gnutls_certificate_get_peers
1247
(session._c_object, ctypes.byref(list_size)))
1248
if not bool(cert_list) and list_size.value != 0:
1249
raise gnutls.errors.GNUTLSError(u"error getting peer"
1250
u" certificate")
1251
if list_size.value == 0:
1252
return None
1253
cert = cert_list[0]
1254
return ctypes.string_at(cert.data, cert.size)
1255
1256
@staticmethod
1257
def fingerprint(openpgp):
1258
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1259
# New GnuTLS "datum" with the OpenPGP public key
1260
datum = (gnutls.library.types
1261
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1262
ctypes.POINTER
1263
(ctypes.c_ubyte)),
1264
ctypes.c_uint(len(openpgp))))
1265
# New empty GnuTLS certificate
1266
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1267
(gnutls.library.functions
1268
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1269
# Import the OpenPGP public key into the certificate
1270
(gnutls.library.functions
1271
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1272
gnutls.library.constants
1273
.GNUTLS_OPENPGP_FMT_RAW))
1274
# Verify the self signature in the key
1275
crtverify = ctypes.c_uint()
1276
(gnutls.library.functions
1277
.gnutls_openpgp_crt_verify_self(crt, 0,
1278
ctypes.byref(crtverify)))
1279
if crtverify.value != 0:
1280
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1281
raise (gnutls.errors.CertificateSecurityError
1282
(u"Verify failed"))
1283
# New buffer for the fingerprint
1284
buf = ctypes.create_string_buffer(20)
1285
buf_len = ctypes.c_size_t()
1286
# Get the fingerprint from the certificate into the buffer
1287
(gnutls.library.functions
1288
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1289
ctypes.byref(buf_len)))
1290
# Deinit the certificate
1291
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1292
# Convert the buffer to a Python bytestring
1293
fpr = ctypes.string_at(buf, buf_len.value)
1294
# Convert the bytestring to hexadecimal notation
1295
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1296
return hex_fpr
1297
1298
1299
class MultiprocessingMixIn(object):
1300
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1301
def sub_process_main(self, request, address):
1302
try:
1303
self.finish_request(request, address)
1304
except:
1305
self.handle_error(request, address)
1306
self.close_request(request)
1307
1308
def process_request(self, request, address):
1309
"""Start a new process to process the request."""
1310
multiprocessing.Process(target = self.sub_process_main,
1311
args = (request, address)).start()
1312
1313
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1314
""" adds a pipe to the MixIn """
1315
def process_request(self, request, client_address):
1316
"""Overrides and wraps the original process_request().
1317
1318
This function creates a new pipe in self.pipe
1319
"""
1320
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1321
1322
super(MultiprocessingMixInWithPipe,
1323
self).process_request(request, client_address)
1324
self.add_pipe(parent_pipe)
1325
def add_pipe(self, parent_pipe):
1326
"""Dummy function; override as necessary"""
1327
pass
1328
1329
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1330
socketserver.TCPServer, object):
1331
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1332
518
1333
Attributes:
519
settings: Server settings
520
clients: Set() of Client objects
521
1334
enabled: Boolean; whether this server is activated yet
1335
interface: None or a network interface name (string)
1336
use_ipv6: Boolean; to use IPv6 or not
522
1337
"""
523
address_family = socket.AF_INET6
524
def __init__(self, *args, **kwargs):
525
if "settings" in kwargs:
526
self.settings = kwargs["settings"]
527
del kwargs["settings"]
528
if "clients" in kwargs:
529
self.clients = kwargs["clients"]
530
del kwargs["clients"]
531
self.enabled = False
532
return super(type(self), self).__init__(*args, **kwargs)
1338
def __init__(self, server_address, RequestHandlerClass,
1339
interface=None, use_ipv6=True):
1340
self.interface = interface
1341
if use_ipv6:
1342
self.address_family = socket.AF_INET6
1343
socketserver.TCPServer.__init__(self, server_address,
1344
RequestHandlerClass)
533
1345
def server_bind(self):
534
1346
"""This overrides the normal server_bind() function
535
1347
to bind to an interface if one was specified, and also NOT to
536
1348
bind to an address or port if they were not specified."""
537
if self.settings["interface"]:
538
# 25 is from /usr/include/asm-i486/socket.h
539
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
540
try:
541
self.socket.setsockopt(socket.SOL_SOCKET,
542
SO_BINDTODEVICE,
543
self.settings["interface"])
544
except socket.error, error:
545
if error[0] == errno.EPERM:
546
logger.error(u"No permission to"
547
u" bind to interface %s",
548
self.settings["interface"])
549
else:
550
raise error
1349
if self.interface is not None:
1350
if SO_BINDTODEVICE is None:
1351
logger.error(u"SO_BINDTODEVICE does not exist;"
1352
u" cannot bind to interface %s",
1353
self.interface)
1354
else:
1355
try:
1356
self.socket.setsockopt(socket.SOL_SOCKET,
1357
SO_BINDTODEVICE,
1358
str(self.interface
1359
+ u'\0'))
1360
except socket.error, error:
1361
if error[0] == errno.EPERM:
1362
logger.error(u"No permission to"
1363
u" bind to interface %s",
1364
self.interface)
1365
elif error[0] == errno.ENOPROTOOPT:
1366
logger.error(u"SO_BINDTODEVICE not available;"
1367
u" cannot bind to interface %s",
1368
self.interface)
1369
else:
1370
raise
551
1371
# Only bind(2) the socket if we really need to.
552
1372
if self.server_address[0] or self.server_address[1]:
553
1373
if not self.server_address[0]:
554
in6addr_any = "::"
555
self.server_address = (in6addr_any,
1374
if self.address_family == socket.AF_INET6:
1375
any_address = u"::" # in6addr_any
1376
else:
1377
any_address = socket.INADDR_ANY
1378
self.server_address = (any_address,
556
1379
self.server_address[1])
557
1380
elif not self.server_address[1]:
558
1381
self.server_address = (self.server_address[0],
559
1382
0)
560
# if self.settings["interface"]:
1383
# if self.interface:
561
1384
# self.server_address = (self.server_address[0],
562
1385
# 0, # port
563
1386
# 0, # flowinfo
564
1387
# if_nametoindex
565
# (self.settings
566
# ["interface"]))
567
return super(type(self), self).server_bind()
1388
# (self.interface))
1389
return socketserver.TCPServer.server_bind(self)
1390
1391
1392
class MandosServer(IPv6_TCPServer):
1393
"""Mandos server.
1394
1395
Attributes:
1396
clients: set of Client objects
1397
gnutls_priority GnuTLS priority string
1398
use_dbus: Boolean; to emit D-Bus signals or not
1399
1400
Assumes a gobject.MainLoop event loop.
1401
"""
1402
def __init__(self, server_address, RequestHandlerClass,
1403
interface=None, use_ipv6=True, clients=None,
1404
gnutls_priority=None, use_dbus=True):
1405
self.enabled = False
1406
self.clients = clients
1407
if self.clients is None:
1408
self.clients = set()
1409
self.use_dbus = use_dbus
1410
self.gnutls_priority = gnutls_priority
1411
IPv6_TCPServer.__init__(self, server_address,
1412
RequestHandlerClass,
1413
interface = interface,
1414
use_ipv6 = use_ipv6)
568
1415
def server_activate(self):
569
1416
if self.enabled:
570
return super(type(self), self).server_activate()
1417
return socketserver.TCPServer.server_activate(self)
571
1418
def enable(self):
572
1419
self.enabled = True
1420
def add_pipe(self, parent_pipe):
1421
# Call "handle_ipc" for both data and EOF events
1422
gobject.io_add_watch(parent_pipe.fileno(),
1423
gobject.IO_IN | gobject.IO_HUP,
1424
functools.partial(self.handle_ipc,
1425
parent_pipe = parent_pipe))
1426
1427
def handle_ipc(self, source, condition, parent_pipe=None,
1428
client_object=None):
1429
condition_names = {
1430
gobject.IO_IN: u"IN", # There is data to read.
1431
gobject.IO_OUT: u"OUT", # Data can be written (without
1432
# blocking).
1433
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1434
gobject.IO_ERR: u"ERR", # Error condition.
1435
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1436
# broken, usually for pipes and
1437
# sockets).
1438
}
1439
conditions_string = ' | '.join(name
1440
for cond, name in
1441
condition_names.iteritems()
1442
if cond & condition)
1443
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1444
conditions_string)
1445
1446
# Read a request from the child
1447
request = parent_pipe.recv()
1448
command = request[0]
1449
1450
if command == 'init':
1451
fpr = request[1]
1452
address = request[2]
1453
1454
for c in self.clients:
1455
if c.fingerprint == fpr:
1456
client = c
1457
break
1458
else:
1459
logger.warning(u"Client not found for fingerprint: %s, ad"
1460
u"dress: %s", fpr, address)
1461
if self.use_dbus:
1462
# Emit D-Bus signal
1463
mandos_dbus_service.ClientNotFound(fpr, address)
1464
parent_pipe.send(False)
1465
return False
1466
1467
gobject.io_add_watch(parent_pipe.fileno(),
1468
gobject.IO_IN | gobject.IO_HUP,
1469
functools.partial(self.handle_ipc,
1470
parent_pipe = parent_pipe,
1471
client_object = client))
1472
parent_pipe.send(True)
1473
# remove the old hook in favor of the new above hook on same fileno
1474
return False
1475
if command == 'funcall':
1476
funcname = request[1]
1477
args = request[2]
1478
kwargs = request[3]
1479
1480
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1481
1482
if command == 'getattr':
1483
attrname = request[1]
1484
if callable(client_object.__getattribute__(attrname)):
1485
parent_pipe.send(('function',))
1486
else:
1487
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1488
1489
if command == 'setattr':
1490
attrname = request[1]
1491
value = request[2]
1492
setattr(client_object, attrname, value)
1493
1494
return True
573
1495
574
1496
575
1497
def string_to_delta(interval):
576
1498
"""Parse a string and return a datetime.timedelta
577
578
>>> string_to_delta('7d')
1499
1500
>>> string_to_delta(u'7d')
579
1501
datetime.timedelta(7)
580
>>> string_to_delta('60s')
1502
>>> string_to_delta(u'60s')
581
1503
datetime.timedelta(0, 60)
582
>>> string_to_delta('60m')
1504
>>> string_to_delta(u'60m')
583
1505
datetime.timedelta(0, 3600)
584
>>> string_to_delta('24h')
1506
>>> string_to_delta(u'24h')
585
1507
datetime.timedelta(1)
586
1508
>>> string_to_delta(u'1w')
587
1509
datetime.timedelta(7)
588
>>> string_to_delta('5m 30s')
1510
>>> string_to_delta(u'5m 30s')
589
1511
datetime.timedelta(0, 330)
590
1512
"""
591
1513
timevalue = datetime.timedelta(0)
592
1514
for s in interval.split():
593
1515
try:
594
suffix=unicode(s[-1])
595
value=int(s[:-1])
1516
suffix = unicode(s[-1])
1517
value = int(s[:-1])
596
1518
if suffix == u"d":
597
1519
delta = datetime.timedelta(value)
598
1520
elif suffix == u"s":
604
1526
elif suffix == u"w":
605
1527
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
606
1528
else:
607
raise ValueError
608
except (ValueError, IndexError):
609
raise ValueError
1529
raise ValueError(u"Unknown suffix %r" % suffix)
1530
except (ValueError, IndexError), e:
1531
raise ValueError(e.message)
610
1532
timevalue += delta
611
1533
return timevalue
612
1534
613
1535
614
def server_state_changed(state):
615
"""Derived from the Avahi example code"""
616
if state == avahi.SERVER_COLLISION:
617
logger.error(u"Zeroconf server name collision")
618
service.remove()
619
elif state == avahi.SERVER_RUNNING:
620
service.add()
621
622
623
def entry_group_state_changed(state, error):
624
"""Derived from the Avahi example code"""
625
logger.debug(u"Avahi state change: %i", state)
626
627
if state == avahi.ENTRY_GROUP_ESTABLISHED:
628
logger.debug(u"Zeroconf service established.")
629
elif state == avahi.ENTRY_GROUP_COLLISION:
630
logger.warning(u"Zeroconf service name collision.")
631
service.rename()
632
elif state == avahi.ENTRY_GROUP_FAILURE:
633
logger.critical(u"Avahi: Error in group state changed %s",
634
unicode(error))
635
raise AvahiGroupError("State changed: %s", str(error))
636
637
1536
def if_nametoindex(interface):
638
"""Call the C function if_nametoindex(), or equivalent"""
1537
"""Call the C function if_nametoindex(), or equivalent
1538
1539
Note: This function cannot accept a unicode string."""
639
1540
global if_nametoindex
640
1541
try:
641
if "ctypes.util" not in sys.modules:
642
import ctypes.util
643
if_nametoindex = ctypes.cdll.LoadLibrary\
644
(ctypes.util.find_library("c")).if_nametoindex
1542
if_nametoindex = (ctypes.cdll.LoadLibrary
1543
(ctypes.util.find_library(u"c"))
1544
.if_nametoindex)
645
1545
except (OSError, AttributeError):
646
if "struct" not in sys.modules:
647
import struct
648
if "fcntl" not in sys.modules:
649
import fcntl
1546
logger.warning(u"Doing if_nametoindex the hard way")
650
1547
def if_nametoindex(interface):
651
1548
"Get an interface index the hard way, i.e. using fcntl()"
652
1549
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
653
s = socket.socket()
654
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
655
struct.pack("16s16x", interface))
656
s.close()
657
interface_index = struct.unpack("I", ifreq[16:20])[0]
1550
with contextlib.closing(socket.socket()) as s:
1551
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1552
struct.pack(str(u"16s16x"),
1553
interface))
1554
interface_index = struct.unpack(str(u"I"),
1555
ifreq[16:20])[0]
658
1556
return interface_index
659
1557
return if_nametoindex(interface)
660
1558
661
1559
662
1560
def daemon(nochdir = False, noclose = False):
663
1561
"""See daemon(3). Standard BSD Unix function.
1562
664
1563
This should really exist as os.daemon, but it doesn't (yet)."""
665
1564
if os.fork():
666
1565
sys.exit()
667
1566
os.setsid()
668
1567
if not nochdir:
669
os.chdir("/")
1568
os.chdir(u"/")
670
1569
if os.fork():
671
1570
sys.exit()
672
1571
if not noclose:
674
1573
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
675
1574
if not stat.S_ISCHR(os.fstat(null).st_mode):
676
1575
raise OSError(errno.ENODEV,
677
"/dev/null not a character device")
1576
u"%s not a character device"
1577
% os.path.devnull)
678
1578
os.dup2(null, sys.stdin.fileno())
679
1579
os.dup2(null, sys.stdout.fileno())
680
1580
os.dup2(null, sys.stderr.fileno())
683
1583
684
1584
685
1585
def main():
686
global main_loop_started
687
main_loop_started = False
688
689
parser = OptionParser(version = "%%prog %s" % version)
690
parser.add_option("-i", "--interface", type="string",
691
metavar="IF", help="Bind to interface IF")
692
parser.add_option("-a", "--address", type="string",
693
help="Address to listen for requests on")
694
parser.add_option("-p", "--port", type="int",
695
help="Port number to receive requests on")
696
parser.add_option("--check", action="store_true", default=False,
697
help="Run self-test")
698
parser.add_option("--debug", action="store_true",
699
help="Debug mode; run in foreground and log to"
700
" terminal")
701
parser.add_option("--priority", type="string", help="GnuTLS"
702
" priority string (see GnuTLS documentation)")
703
parser.add_option("--servicename", type="string", metavar="NAME",
704
help="Zeroconf service name")
705
parser.add_option("--configdir", type="string",
706
default="/etc/mandos", metavar="DIR",
707
help="Directory to search for configuration"
708
" files")
709
(options, args) = parser.parse_args()
1586
1587
##################################################################
1588
# Parsing of options, both command line and config file
1589
1590
parser = optparse.OptionParser(version = "%%prog %s" % version)
1591
parser.add_option("-i", u"--interface", type=u"string",
1592
metavar="IF", help=u"Bind to interface IF")
1593
parser.add_option("-a", u"--address", type=u"string",
1594
help=u"Address to listen for requests on")
1595
parser.add_option("-p", u"--port", type=u"int",
1596
help=u"Port number to receive requests on")
1597
parser.add_option("--check", action=u"store_true",
1598
help=u"Run self-test")
1599
parser.add_option("--debug", action=u"store_true",
1600
help=u"Debug mode; run in foreground and log to"
1601
u" terminal")
1602
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1603
u" priority string (see GnuTLS documentation)")
1604
parser.add_option("--servicename", type=u"string",
1605
metavar=u"NAME", help=u"Zeroconf service name")
1606
parser.add_option("--configdir", type=u"string",
1607
default=u"/etc/mandos", metavar=u"DIR",
1608
help=u"Directory to search for configuration"
1609
u" files")
1610
parser.add_option("--no-dbus", action=u"store_false",
1611
dest=u"use_dbus", help=u"Do not provide D-Bus"
1612
u" system bus interface")
1613
parser.add_option("--no-ipv6", action=u"store_false",
1614
dest=u"use_ipv6", help=u"Do not use IPv6")
1615
options = parser.parse_args()[0]
710
1616
711
1617
if options.check:
712
1618
import doctest
714
1620
sys.exit()
715
1621
716
1622
# Default values for config file for server-global settings
717
server_defaults = { "interface": "",
718
"address": "",
719
"port": "",
720
"debug": "False",
721
"priority":
722
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
723
"servicename": "Mandos",
1623
server_defaults = { u"interface": u"",
1624
u"address": u"",
1625
u"port": u"",
1626
u"debug": u"False",
1627
u"priority":
1628
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1629
u"servicename": u"Mandos",
1630
u"use_dbus": u"True",
1631
u"use_ipv6": u"True",
724
1632
}
725
1633
726
1634
# Parse config file for server-global settings
727
server_config = ConfigParser.SafeConfigParser(server_defaults)
1635
server_config = configparser.SafeConfigParser(server_defaults)
728
1636
del server_defaults
729
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1637
server_config.read(os.path.join(options.configdir,
1638
u"mandos.conf"))
730
1639
# Convert the SafeConfigParser object to a dict
731
1640
server_settings = server_config.defaults()
732
# Use getboolean on the boolean config option
733
server_settings["debug"] = server_config.getboolean\
734
("DEFAULT", "debug")
1641
# Use the appropriate methods on the non-string config options
1642
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1643
server_settings[option] = server_config.getboolean(u"DEFAULT",
1644
option)
1645
if server_settings["port"]:
1646
server_settings["port"] = server_config.getint(u"DEFAULT",
1647
u"port")
735
1648
del server_config
736
1649
737
1650
# Override the settings from the config file with command line
738
1651
# options, if set.
739
for option in ("interface", "address", "port", "debug",
740
"priority", "servicename", "configdir"):
1652
for option in (u"interface", u"address", u"port", u"debug",
1653
u"priority", u"servicename", u"configdir",
1654
u"use_dbus", u"use_ipv6"):
741
1655
value = getattr(options, option)
742
1656
if value is not None:
743
1657
server_settings[option] = value
744
1658
del options
1659
# Force all strings to be unicode
1660
for option in server_settings.keys():
1661
if type(server_settings[option]) is str:
1662
server_settings[option] = unicode(server_settings[option])
745
1663
# Now we have our good server settings in "server_settings"
746
1664
747
debug = server_settings["debug"]
1665
##################################################################
1666
1667
# For convenience
1668
debug = server_settings[u"debug"]
1669
use_dbus = server_settings[u"use_dbus"]
1670
use_ipv6 = server_settings[u"use_ipv6"]
748
1671
749
1672
if not debug:
750
1673
syslogger.setLevel(logging.WARNING)
751
1674
console.setLevel(logging.WARNING)
752
1675
753
if server_settings["servicename"] != "Mandos":
754
syslogger.setFormatter(logging.Formatter\
755
('Mandos (%s): %%(levelname)s:'
756
' %%(message)s'
757
% server_settings["servicename"]))
1676
if server_settings[u"servicename"] != u"Mandos":
1677
syslogger.setFormatter(logging.Formatter
1678
(u'Mandos (%s) [%%(process)d]:'
1679
u' %%(levelname)s: %%(message)s'
1680
% server_settings[u"servicename"]))
758
1681
759
1682
# Parse config file with clients
760
client_defaults = { "timeout": "1h",
761
"interval": "5m",
762
"checker": "fping -q -- %(host)s",
763
"host": "",
1683
client_defaults = { u"timeout": u"1h",
1684
u"interval": u"5m",
1685
u"checker": u"fping -q -- %%(host)s",
1686
u"host": u"",
1687
u"approved_delay": u"5m",
1688
u"approved_duration": u"1s",
764
1689
}
765
client_config = ConfigParser.SafeConfigParser(client_defaults)
766
client_config.read(os.path.join(server_settings["configdir"],
767
"clients.conf"))
768
769
clients = Set()
770
tcp_server = IPv6_TCPServer((server_settings["address"],
771
server_settings["port"]),
772
tcp_handler,
773
settings=server_settings,
774
clients=clients)
775
pidfilename = "/var/run/mandos.pid"
776
try:
777
pidfile = open(pidfilename, "w")
778
except IOError, error:
779
logger.error("Could not open file %r", pidfilename)
780
781
uid = 65534
782
gid = 65534
783
try:
784
uid = pwd.getpwnam("mandos").pw_uid
785
except KeyError:
786
try:
787
uid = pwd.getpwnam("nobody").pw_uid
788
except KeyError:
789
pass
790
try:
791
gid = pwd.getpwnam("mandos").pw_gid
792
except KeyError:
793
try:
794
gid = pwd.getpwnam("nogroup").pw_gid
795
except KeyError:
796
pass
797
try:
1690
client_config = configparser.SafeConfigParser(client_defaults)
1691
client_config.read(os.path.join(server_settings[u"configdir"],
1692
u"clients.conf"))
1693
1694
global mandos_dbus_service
1695
mandos_dbus_service = None
1696
1697
tcp_server = MandosServer((server_settings[u"address"],
1698
server_settings[u"port"]),
1699
ClientHandler,
1700
interface=server_settings[u"interface"],
1701
use_ipv6=use_ipv6,
1702
gnutls_priority=
1703
server_settings[u"priority"],
1704
use_dbus=use_dbus)
1705
pidfilename = u"/var/run/mandos.pid"
1706
try:
1707
pidfile = open(pidfilename, u"w")
1708
except IOError:
1709
logger.error(u"Could not open file %r", pidfilename)
1710
1711
try:
1712
uid = pwd.getpwnam(u"_mandos").pw_uid
1713
gid = pwd.getpwnam(u"_mandos").pw_gid
1714
except KeyError:
1715
try:
1716
uid = pwd.getpwnam(u"mandos").pw_uid
1717
gid = pwd.getpwnam(u"mandos").pw_gid
1718
except KeyError:
1719
try:
1720
uid = pwd.getpwnam(u"nobody").pw_uid
1721
gid = pwd.getpwnam(u"nobody").pw_gid
1722
except KeyError:
1723
uid = 65534
1724
gid = 65534
1725
try:
1726
os.setgid(gid)
798
1727
os.setuid(uid)
799
os.setgid(gid)
800
1728
except OSError, error:
801
1729
if error[0] != errno.EPERM:
802
1730
raise error
803
1731
804
global service
805
service = AvahiService(name = server_settings["servicename"],
806
type = "_mandos._tcp", );
807
if server_settings["interface"]:
808
service.interface = if_nametoindex\
809
(server_settings["interface"])
1732
# Enable all possible GnuTLS debugging
1733
if debug:
1734
# "Use a log level over 10 to enable all debugging options."
1735
# - GnuTLS manual
1736
gnutls.library.functions.gnutls_global_set_log_level(11)
1737
1738
@gnutls.library.types.gnutls_log_func
1739
def debug_gnutls(level, string):
1740
logger.debug(u"GnuTLS: %s", string[:-1])
1741
1742
(gnutls.library.functions
1743
.gnutls_global_set_log_function(debug_gnutls))
810
1744
811
1745
global main_loop
812
global bus
813
global server
814
1746
# From the Avahi example code
815
1747
DBusGMainLoop(set_as_default=True )
816
1748
main_loop = gobject.MainLoop()
817
1749
bus = dbus.SystemBus()
818
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
819
avahi.DBUS_PATH_SERVER),
820
avahi.DBUS_INTERFACE_SERVER)
821
1750
# End of Avahi example code
822
823
def remove_from_clients(client):
824
clients.remove(client)
825
if not clients:
826
logger.critical(u"No clients left, exiting")
827
sys.exit()
828
829
clients.update(Set(Client(name = section,
830
stop_hook = remove_from_clients,
831
config
832
= dict(client_config.items(section)))
833
for section in client_config.sections()))
834
if not clients:
835
logger.critical(u"No clients defined")
836
sys.exit(1)
1751
if use_dbus:
1752
try:
1753
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1754
bus, do_not_queue=True)
1755
except dbus.exceptions.NameExistsException, e:
1756
logger.error(unicode(e) + u", disabling D-Bus")
1757
use_dbus = False
1758
server_settings[u"use_dbus"] = False
1759
tcp_server.use_dbus = False
1760
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1761
service = AvahiService(name = server_settings[u"servicename"],
1762
servicetype = u"_mandos._tcp",
1763
protocol = protocol, bus = bus)
1764
if server_settings["interface"]:
1765
service.interface = (if_nametoindex
1766
(str(server_settings[u"interface"])))
1767
1768
client_class = Client
1769
if use_dbus:
1770
client_class = functools.partial(ClientDBus, bus = bus)
1771
def client_config_items(config, section):
1772
special_settings = {
1773
"approved_by_default":
1774
lambda: config.getboolean(section,
1775
"approved_by_default"),
1776
}
1777
for name, value in config.items(section):
1778
try:
1779
yield (name, special_settings[name]())
1780
except KeyError:
1781
yield (name, value)
1782
1783
tcp_server.clients.update(set(
1784
client_class(name = section,
1785
config= dict(client_config_items(
1786
client_config, section)))
1787
for section in client_config.sections()))
1788
if not tcp_server.clients:
1789
logger.warning(u"No clients defined")
837
1790
838
1791
if debug:
839
1792
# Redirect stdin so all checkers get /dev/null
848
1801
daemon()
849
1802
850
1803
try:
851
pid = os.getpid()
852
pidfile.write(str(pid) + "\n")
853
pidfile.close()
1804
with pidfile:
1805
pid = os.getpid()
1806
pidfile.write(str(pid) + "\n")
854
1807
del pidfile
855
except IOError, err:
1808
except IOError:
856
1809
logger.error(u"Could not write to file %r with PID %d",
857
1810
pidfilename, pid)
858
1811
except NameError:
860
1813
pass
861
1814
del pidfilename
862
1815
1816
if not debug:
1817
signal.signal(signal.SIGINT, signal.SIG_IGN)
1818
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1819
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1820
1821
if use_dbus:
1822
class MandosDBusService(dbus.service.Object):
1823
"""A D-Bus proxy object"""
1824
def __init__(self):
1825
dbus.service.Object.__init__(self, bus, u"/")
1826
_interface = u"se.bsnet.fukt.Mandos"
1827
1828
@dbus.service.signal(_interface, signature=u"o")
1829
def ClientAdded(self, objpath):
1830
"D-Bus signal"
1831
pass
1832
1833
@dbus.service.signal(_interface, signature=u"ss")
1834
def ClientNotFound(self, fingerprint, address):
1835
"D-Bus signal"
1836
pass
1837
1838
@dbus.service.signal(_interface, signature=u"os")
1839
def ClientRemoved(self, objpath, name):
1840
"D-Bus signal"
1841
pass
1842
1843
@dbus.service.method(_interface, out_signature=u"ao")
1844
def GetAllClients(self):
1845
"D-Bus method"
1846
return dbus.Array(c.dbus_object_path
1847
for c in tcp_server.clients)
1848
1849
@dbus.service.method(_interface,
1850
out_signature=u"a{oa{sv}}")
1851
def GetAllClientsWithProperties(self):
1852
"D-Bus method"
1853
return dbus.Dictionary(
1854
((c.dbus_object_path, c.GetAll(u""))
1855
for c in tcp_server.clients),
1856
signature=u"oa{sv}")
1857
1858
@dbus.service.method(_interface, in_signature=u"o")
1859
def RemoveClient(self, object_path):
1860
"D-Bus method"
1861
for c in tcp_server.clients:
1862
if c.dbus_object_path == object_path:
1863
tcp_server.clients.remove(c)
1864
c.remove_from_connection()
1865
# Don't signal anything except ClientRemoved
1866
c.disable(quiet=True)
1867
# Emit D-Bus signal
1868
self.ClientRemoved(object_path, c.name)
1869
return
1870
raise KeyError(object_path)
1871
1872
del _interface
1873
1874
mandos_dbus_service = MandosDBusService()
1875
863
1876
def cleanup():
864
1877
"Cleanup function; run on exit"
865
global group
866
# From the Avahi example code
867
if not group is None:
868
group.Free()
869
group = None
870
# End of Avahi example code
1878
service.cleanup()
871
1879
872
while clients:
873
client = clients.pop()
874
client.stop_hook = None
875
client.stop()
1880
while tcp_server.clients:
1881
client = tcp_server.clients.pop()
1882
if use_dbus:
1883
client.remove_from_connection()
1884
client.disable_hook = None
1885
# Don't signal anything except ClientRemoved
1886
client.disable(quiet=True)
1887
if use_dbus:
1888
# Emit D-Bus signal
1889
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1890
client.name)
876
1891
877
1892
atexit.register(cleanup)
878
1893
879
if not debug:
880
signal.signal(signal.SIGINT, signal.SIG_IGN)
881
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
882
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
883
884
for client in clients:
885
client.start()
1894
for client in tcp_server.clients:
1895
if use_dbus:
1896
# Emit D-Bus signal
1897
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1898
client.enable()
886
1899
887
1900
tcp_server.enable()
888
1901
tcp_server.server_activate()
889
1902
890
1903
# Find out what port we got
891
1904
service.port = tcp_server.socket.getsockname()[1]
892
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
893
u" scope_id %d" % tcp_server.socket.getsockname())
1905
if use_ipv6:
1906
logger.info(u"Now listening on address %r, port %d,"
1907
" flowinfo %d, scope_id %d"
1908
% tcp_server.socket.getsockname())
1909
else: # IPv4
1910
logger.info(u"Now listening on address %r, port %d"
1911
% tcp_server.socket.getsockname())
894
1912
895
1913
#service.interface = tcp_server.socket.getsockname()[3]
896
1914
897
1915
try:
898
1916
# From the Avahi example code
899
server.connect_to_signal("StateChanged", server_state_changed)
900
1917
try:
901
server_state_changed(server.GetState())
1918
service.activate()
902
1919
except dbus.exceptions.DBusException, error:
903
1920
logger.critical(u"DBusException: %s", error)
1921
cleanup()
904
1922
sys.exit(1)
905
1923
# End of Avahi example code
906
1924
907
1925
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
908
1926
lambda *args, **kwargs:
909
tcp_server.handle_request\
910
(*args[2:], **kwargs) or True)
1927
(tcp_server.handle_request
1928
(*args[2:], **kwargs) or True))
911
1929
912
1930
logger.debug(u"Starting main loop")
913
main_loop_started = True
914
1931
main_loop.run()
915
1932
except AvahiError, error:
916
logger.critical(u"AvahiError: %s" + unicode(error))
1933
logger.critical(u"AvahiError: %s", error)
1934
cleanup()
917
1935
sys.exit(1)
918
1936
except KeyboardInterrupt:
919
1937
if debug:
920
print
1938
print >> sys.stderr
1939
logger.debug(u"Server received KeyboardInterrupt")
1940
logger.debug(u"Server exiting")
1941
# Must run before the D-Bus bus name gets deregistered
1942
cleanup()
921
1943
922
1944
if __name__ == '__main__':
923
1945
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0