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- Committer: Björn Påhlsson
- Date: 2010-09-07 18:48:56 UTC
- mto: (237.7.1 mandos)
- mto: This revision was merged to the branch mainline in revision 270.
- Revision ID: belorn@fukt.bsnet.se-20100907184856-waz6cvxbm7ranha2
added the actually plugin file for plymouth
- files added:
- .bzr-builddeb
- debian
- debian/po
- files removed:
- network-protocol.txt
- files renamed:
- mandos-client.c => plugin-runner.c
- mandos-client.xml => plugin-runner.xml
- plugins.d/password-request.c => plugins.d/mandos-client.c
- plugins.d/password-request.xml => plugins.d/mandos-client.xml
- files modified:
- Makefile
added
removed
mandos
6
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",
10
# "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
24
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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 <http://www.gnu.org/licenses/>.
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# along with this program. If not, see
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# <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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33
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from __future__ import division
34
from __future__ import division, with_statement, absolute_import
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35
34
import SocketServer
36
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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64
58
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import dbus
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import dbus.service
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import gobject
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68
import avahi
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from dbus.mainloop.glib import DBusGMainLoop
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70
import ctypes
63
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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
73
import inspect
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75
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.getLogger(u'mandos')
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logger = logging.Logger(u'mandos')
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syslogger = (logging.handlers.SysLogHandler
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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = "/dev/log"))
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syslogger.setFormatter(logging.Formatter
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(u'Mandos [%(process)d]: %(levelname)s:'
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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(u'%(name)s [%(process)d]:'
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u' %(levelname)s:'
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u' %(message)s'))
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logger.addHandler(console)
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class AvahiError(Exception):
75
def __init__(self, value):
103
def __init__(self, value, *args, **kwargs):
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self.value = value
77
def __str__(self):
78
return repr(self.value)
105
super(AvahiError, self).__init__(value, *args, **kwargs)
106
def __unicode__(self):
107
return unicode(repr(self.value))
79
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80
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class AvahiServiceError(AvahiError):
81
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pass
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class AvahiService(object):
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"""An Avahi (Zeroconf) service.
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89
119
Attributes:
90
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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.
92
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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126
TXT: list of strings; TXT record for the service
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129
max_renames: integer; maximum number of renames
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rename_count: integer; counter so we only rename after collisions
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131
a sensible number of times
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group: D-Bus Entry Group
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server: D-Bus Server
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bus: dbus.SystemBus()
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135
"""
103
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def __init__(self, interface = avahi.IF_UNSPEC, name = None,
104
type = None, port = None, TXT = None, domain = "",
105
host = "", max_renames = 32768):
137
servicetype = None, port = None, TXT = None,
138
domain = u"", host = u"", max_renames = 32768,
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protocol = avahi.PROTO_UNSPEC, bus = None):
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self.interface = interface
107
141
self.name = name
108
self.type = type
142
self.type = servicetype
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143
self.port = port
110
if TXT is None:
111
self.TXT = []
112
else:
113
self.TXT = TXT
144
self.TXT = TXT if TXT is not None else []
114
145
self.domain = domain
115
146
self.host = host
116
147
self.rename_count = 0
148
self.max_renames = max_renames
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self.protocol = protocol
150
self.group = None # our entry group
151
self.server = None
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self.bus = bus
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153
def rename(self):
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"""Derived from the Avahi example code"""
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if self.rename_count >= self.max_renames:
120
logger.critical(u"No suitable service name found after %i"
121
u" retries, exiting.", rename_count)
122
raise AvahiServiceError("Too many renames")
123
name = server.GetAlternativeServiceName(name)
124
logger.error(u"Changing name to %r ...", name)
125
syslogger.setFormatter(logging.Formatter\
126
('Mandos (%s): %%(levelname)s:'
127
' %%(message)s' % name))
156
logger.critical(u"No suitable Zeroconf service name found"
157
u" after %i retries, exiting.",
158
self.rename_count)
159
raise AvahiServiceError(u"Too many renames")
160
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
161
logger.info(u"Changing Zeroconf service name to %r ...",
162
self.name)
163
syslogger.setFormatter(logging.Formatter
164
(u'Mandos (%s) [%%(process)d]:'
165
u' %%(levelname)s: %%(message)s'
166
% self.name))
128
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self.remove()
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168
self.add()
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self.rename_count += 1
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170
def remove(self):
132
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"""Derived from the Avahi example code"""
133
if group is not None:
134
group.Reset()
172
if self.group is not None:
173
self.group.Reset()
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174
def add(self):
136
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"""Derived from the Avahi example code"""
137
global group
138
if group is None:
139
group = dbus.Interface\
140
(bus.get_object(avahi.DBUS_NAME,
141
server.EntryGroupNew()),
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avahi.DBUS_INTERFACE_ENTRY_GROUP)
143
group.connect_to_signal('StateChanged',
144
entry_group_state_changed)
145
logger.debug(u"Adding service '%s' of type '%s' ...",
146
service.name, service.type)
147
group.AddService(
148
self.interface, # interface
149
avahi.PROTO_INET6, # protocol
150
dbus.UInt32(0), # flags
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self.name, self.type,
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self.domain, self.host,
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dbus.UInt16(self.port),
154
avahi.string_array_to_txt_array(self.TXT))
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group.Commit()
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157
# From the Avahi example code:
158
group = None # our entry group
159
# End of Avahi example code
176
if self.group is None:
177
self.group = dbus.Interface(
178
self.bus.get_object(avahi.DBUS_NAME,
179
self.server.EntryGroupNew()),
180
avahi.DBUS_INTERFACE_ENTRY_GROUP)
181
self.group.connect_to_signal('StateChanged',
182
self
183
.entry_group_state_changed)
184
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
185
self.name, self.type)
186
self.group.AddService(
187
self.interface,
188
self.protocol,
189
dbus.UInt32(0), # flags
190
self.name, self.type,
191
self.domain, self.host,
192
dbus.UInt16(self.port),
193
avahi.string_array_to_txt_array(self.TXT))
194
self.group.Commit()
195
def entry_group_state_changed(self, state, error):
196
"""Derived from the Avahi example code"""
197
logger.debug(u"Avahi entry group state change: %i", state)
198
199
if state == avahi.ENTRY_GROUP_ESTABLISHED:
200
logger.debug(u"Zeroconf service established.")
201
elif state == avahi.ENTRY_GROUP_COLLISION:
202
logger.warning(u"Zeroconf service name collision.")
203
self.rename()
204
elif state == avahi.ENTRY_GROUP_FAILURE:
205
logger.critical(u"Avahi: Error in group state changed %s",
206
unicode(error))
207
raise AvahiGroupError(u"State changed: %s"
208
% unicode(error))
209
def cleanup(self):
210
"""Derived from the Avahi example code"""
211
if self.group is not None:
212
self.group.Free()
213
self.group = None
214
def server_state_changed(self, state):
215
"""Derived from the Avahi example code"""
216
logger.debug(u"Avahi server state change: %i", state)
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",
230
self.server_state_changed)
231
self.server_state_changed(self.server.GetState())
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232
161
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162
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class Client(object):
163
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"""A representation of a client host served by this server.
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164
237
Attributes:
165
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
166
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fingerprint: string (40 or 32 hexadecimal digits); used to
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241
uniquely identify the client
168
secret: bytestring; sent verbatim (over TLS) to client
169
host: string; available for use by the checker command
170
created: datetime.datetime(); object creation, not client host
171
last_checked_ok: datetime.datetime() or None if not yet checked OK
172
timeout: datetime.timedelta(); How long from last_checked_ok
173
until this client is invalid
174
interval: datetime.timedelta(); How often to start a new checker
175
stop_hook: If set, called by stop() as stop_hook(self)
176
checker: subprocess.Popen(); a running checker process used
177
to see if the client lives.
178
'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
244
created: datetime.datetime(); (UTC) object creation
245
last_enabled: datetime.datetime(); (UTC)
246
enabled: bool()
247
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.
179
255
checker_initiator_tag: a gobject event source tag, or None
180
stop_initiator_tag: - '' -
256
disable_initiator_tag: - '' -
181
257
checker_callback_tag: - '' -
182
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checker_command: string; External command which is run to check if
183
259
client lives. %() expansions are done at
184
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runtime with vars(self) as dict, so that for
185
261
instance %(name)s can be used in the command.
186
Private attibutes:
187
_timeout: Real variable for 'timeout'
188
_interval: Real variable for 'interval'
189
_timeout_milliseconds: Used when calling gobject.timeout_add()
190
_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
191
266
"""
192
def _set_timeout(self, timeout):
193
"Setter function for 'timeout' attribute"
194
self._timeout = timeout
195
self._timeout_milliseconds = ((self.timeout.days
196
* 24 * 60 * 60 * 1000)
197
+ (self.timeout.seconds * 1000)
198
+ (self.timeout.microseconds
199
// 1000))
200
timeout = property(lambda self: self._timeout,
201
_set_timeout)
202
del _set_timeout
203
def _set_interval(self, interval):
204
"Setter function for 'interval' attribute"
205
self._interval = interval
206
self._interval_milliseconds = ((self.interval.days
207
* 24 * 60 * 60 * 1000)
208
+ (self.interval.seconds
209
* 1000)
210
+ (self.interval.microseconds
211
// 1000))
212
interval = property(lambda self: self._interval,
213
_set_interval)
214
del _set_interval
215
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):
216
287
"""Note: the 'checker' key in 'config' sets the
217
288
'checker_command' attribute and *not* the 'checker'
218
289
attribute."""
219
290
self.name = name
291
if config is None:
292
config = {}
220
293
logger.debug(u"Creating client %r", self.name)
221
294
# Uppercase and remove spaces from fingerprint for later
222
295
# comparison purposes with return value from the fingerprint()
223
296
# function
224
self.fingerprint = config["fingerprint"].upper()\
225
.replace(u" ", u"")
297
self.fingerprint = (config[u"fingerprint"].upper()
298
.replace(u" ", u""))
226
299
logger.debug(u" Fingerprint: %s", self.fingerprint)
227
if "secret" in config:
228
self.secret = config["secret"].decode(u"base64")
229
elif "secfile" in config:
230
sf = open(config["secfile"])
231
self.secret = sf.read()
232
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()
233
307
else:
234
308
raise TypeError(u"No secret or secfile for client %s"
235
309
% self.name)
236
self.host = config.get("host", "")
237
self.created = datetime.datetime.now()
310
self.host = config.get(u"host", u"")
311
self.created = datetime.datetime.utcnow()
312
self.enabled = False
313
self.last_enabled = None
238
314
self.last_checked_ok = None
239
self.timeout = string_to_delta(config["timeout"])
240
self.interval = string_to_delta(config["interval"])
241
self.stop_hook = stop_hook
315
self.timeout = string_to_delta(config[u"timeout"])
316
self.interval = string_to_delta(config[u"interval"])
317
self.disable_hook = disable_hook
242
318
self.checker = None
243
319
self.checker_initiator_tag = None
244
self.stop_initiator_tag = None
320
self.disable_initiator_tag = None
245
321
self.checker_callback_tag = None
246
self.check_command = config["checker"]
247
def start(self):
322
self.checker_command = config[u"checker"]
323
self.current_checker_command = None
324
self.last_connect = None
325
self._approved = None
326
self.approved_by_default = config.get(u"approved_by_default",
327
True)
328
self.approvals_pending = 0
329
self.approved_delay = string_to_delta(
330
config[u"approved_delay"])
331
self.approved_duration = string_to_delta(
332
config[u"approved_duration"])
333
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
334
335
def send_changedstate(self):
336
self.changedstate.acquire()
337
self.changedstate.notify_all()
338
self.changedstate.release()
339
340
def enable(self):
248
341
"""Start this client's checker and timeout hooks"""
342
if getattr(self, u"enabled", False):
343
# Already enabled
344
return
345
self.send_changedstate()
346
self.last_enabled = datetime.datetime.utcnow()
249
347
# Schedule a new checker to be started an 'interval' from now,
250
348
# and every interval from then on.
251
self.checker_initiator_tag = gobject.timeout_add\
252
(self._interval_milliseconds,
253
self.start_checker)
349
self.checker_initiator_tag = (gobject.timeout_add
350
(self.interval_milliseconds(),
351
self.start_checker))
352
# Schedule a disable() when 'timeout' has passed
353
self.disable_initiator_tag = (gobject.timeout_add
354
(self.timeout_milliseconds(),
355
self.disable))
356
self.enabled = True
254
357
# Also start a new checker *right now*.
255
358
self.start_checker()
256
# Schedule a stop() when 'timeout' has passed
257
self.stop_initiator_tag = gobject.timeout_add\
258
(self._timeout_milliseconds,
259
self.stop)
260
def stop(self):
261
"""Stop this client.
262
The possibility that a client might be restarted is left open,
263
but not currently used."""
264
# If this client doesn't have a secret, it is already stopped.
265
if hasattr(self, "secret") and self.secret:
266
logger.info(u"Stopping client %s", self.name)
267
self.secret = None
268
else:
359
360
def disable(self, quiet=True):
361
"""Disable this client."""
362
if not getattr(self, "enabled", False):
269
363
return False
270
if getattr(self, "stop_initiator_tag", False):
271
gobject.source_remove(self.stop_initiator_tag)
272
self.stop_initiator_tag = None
273
if getattr(self, "checker_initiator_tag", False):
364
if not quiet:
365
self.send_changedstate()
366
if not quiet:
367
logger.info(u"Disabling client %s", self.name)
368
if getattr(self, u"disable_initiator_tag", False):
369
gobject.source_remove(self.disable_initiator_tag)
370
self.disable_initiator_tag = None
371
if getattr(self, u"checker_initiator_tag", False):
274
372
gobject.source_remove(self.checker_initiator_tag)
275
373
self.checker_initiator_tag = None
276
374
self.stop_checker()
277
if self.stop_hook:
278
self.stop_hook(self)
375
if self.disable_hook:
376
self.disable_hook(self)
377
self.enabled = False
279
378
# Do not run this again if called by a gobject.timeout_add
280
379
return False
380
281
381
def __del__(self):
282
self.stop_hook = None
283
self.stop()
284
def checker_callback(self, pid, condition):
382
self.disable_hook = None
383
self.disable()
384
385
def checker_callback(self, pid, condition, command):
285
386
"""The checker has completed, so take appropriate actions."""
286
now = datetime.datetime.now()
287
387
self.checker_callback_tag = None
288
388
self.checker = None
289
if os.WIFEXITED(condition) \
290
and (os.WEXITSTATUS(condition) == 0):
291
logger.info(u"Checker for %(name)s succeeded",
292
vars(self))
293
self.last_checked_ok = now
294
gobject.source_remove(self.stop_initiator_tag)
295
self.stop_initiator_tag = gobject.timeout_add\
296
(self._timeout_milliseconds,
297
self.stop)
298
elif not os.WIFEXITED(condition):
389
if os.WIFEXITED(condition):
390
exitstatus = os.WEXITSTATUS(condition)
391
if exitstatus == 0:
392
logger.info(u"Checker for %(name)s succeeded",
393
vars(self))
394
self.checked_ok()
395
else:
396
logger.info(u"Checker for %(name)s failed",
397
vars(self))
398
else:
299
399
logger.warning(u"Checker for %(name)s crashed?",
300
400
vars(self))
301
else:
302
logger.info(u"Checker for %(name)s failed",
303
vars(self))
401
402
def checked_ok(self):
403
"""Bump up the timeout for this client.
404
405
This should only be called when the client has been seen,
406
alive and well.
407
"""
408
self.last_checked_ok = datetime.datetime.utcnow()
409
gobject.source_remove(self.disable_initiator_tag)
410
self.disable_initiator_tag = (gobject.timeout_add
411
(self.timeout_milliseconds(),
412
self.disable))
413
304
414
def start_checker(self):
305
415
"""Start a new checker subprocess if one is not running.
416
306
417
If a checker already exists, leave it running and do
307
418
nothing."""
308
419
# The reason for not killing a running checker is that if we
311
422
# client would inevitably timeout, since no checker would get
312
423
# a chance to run to completion. If we instead leave running
313
424
# checkers alone, the checker would have to take more time
314
# than 'timeout' for the client to be declared invalid, which
315
# is as it should be.
425
# than 'timeout' for the client to be disabled, which is as it
426
# should be.
427
428
# If a checker exists, make sure it is not a zombie
429
try:
430
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
431
except (AttributeError, OSError), error:
432
if (isinstance(error, OSError)
433
and error.errno != errno.ECHILD):
434
raise error
435
else:
436
if pid:
437
logger.warning(u"Checker was a zombie")
438
gobject.source_remove(self.checker_callback_tag)
439
self.checker_callback(pid, status,
440
self.current_checker_command)
441
# Start a new checker if needed
316
442
if self.checker is None:
317
443
try:
318
# In case check_command has exactly one % operator
319
command = self.check_command % self.host
444
# In case checker_command has exactly one % operator
445
command = self.checker_command % self.host
320
446
except TypeError:
321
447
# Escape attributes for the shell
322
escaped_attrs = dict((key, re.escape(str(val)))
448
escaped_attrs = dict((key,
449
re.escape(unicode(str(val),
450
errors=
451
u'replace')))
323
452
for key, val in
324
453
vars(self).iteritems())
325
454
try:
326
command = self.check_command % escaped_attrs
455
command = self.checker_command % escaped_attrs
327
456
except TypeError, error:
328
457
logger.error(u'Could not format string "%s":'
329
u' %s', self.check_command, error)
458
u' %s', self.checker_command, error)
330
459
return True # Try again later
460
self.current_checker_command = command
331
461
try:
332
462
logger.info(u"Starting checker %r for %s",
333
463
command, self.name)
464
# We don't need to redirect stdout and stderr, since
465
# in normal mode, that is already done by daemon(),
466
# and in debug mode we don't want to. (Stdin is
467
# always replaced by /dev/null.)
334
468
self.checker = subprocess.Popen(command,
335
469
close_fds=True,
336
shell=True, cwd="/")
337
self.checker_callback_tag = gobject.child_watch_add\
338
(self.checker.pid,
339
self.checker_callback)
340
except subprocess.OSError, error:
470
shell=True, cwd=u"/")
471
self.checker_callback_tag = (gobject.child_watch_add
472
(self.checker.pid,
473
self.checker_callback,
474
data=command))
475
# The checker may have completed before the gobject
476
# watch was added. Check for this.
477
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
478
if pid:
479
gobject.source_remove(self.checker_callback_tag)
480
self.checker_callback(pid, status, command)
481
except OSError, error:
341
482
logger.error(u"Failed to start subprocess: %s",
342
483
error)
343
484
# Re-run this periodically if run by gobject.timeout_add
344
485
return True
486
345
487
def stop_checker(self):
346
488
"""Force the checker process, if any, to stop."""
347
489
if self.checker_callback_tag:
348
490
gobject.source_remove(self.checker_callback_tag)
349
491
self.checker_callback_tag = None
350
if getattr(self, "checker", None) is None:
492
if getattr(self, u"checker", None) is None:
351
493
return
352
494
logger.debug(u"Stopping checker for %(name)s", vars(self))
353
495
try:
354
496
os.kill(self.checker.pid, signal.SIGTERM)
355
#os.sleep(0.5)
497
#time.sleep(0.5)
356
498
#if self.checker.poll() is None:
357
499
# os.kill(self.checker.pid, signal.SIGKILL)
358
500
except OSError, error:
359
501
if error.errno != errno.ESRCH: # No such process
360
502
raise
361
503
self.checker = None
362
def still_valid(self):
363
"""Has the timeout not yet passed for this client?"""
364
now = datetime.datetime.now()
504
505
def dbus_service_property(dbus_interface, signature=u"v",
506
access=u"readwrite", byte_arrays=False):
507
"""Decorators for marking methods of a DBusObjectWithProperties to
508
become properties on the D-Bus.
509
510
The decorated method will be called with no arguments by "Get"
511
and with one argument by "Set".
512
513
The parameters, where they are supported, are the same as
514
dbus.service.method, except there is only "signature", since the
515
type from Get() and the type sent to Set() is the same.
516
"""
517
# Encoding deeply encoded byte arrays is not supported yet by the
518
# "Set" method, so we fail early here:
519
if byte_arrays and signature != u"ay":
520
raise ValueError(u"Byte arrays not supported for non-'ay'"
521
u" signature %r" % signature)
522
def decorator(func):
523
func._dbus_is_property = True
524
func._dbus_interface = dbus_interface
525
func._dbus_signature = signature
526
func._dbus_access = access
527
func._dbus_name = func.__name__
528
if func._dbus_name.endswith(u"_dbus_property"):
529
func._dbus_name = func._dbus_name[:-14]
530
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
531
return func
532
return decorator
533
534
535
class DBusPropertyException(dbus.exceptions.DBusException):
536
"""A base class for D-Bus property-related exceptions
537
"""
538
def __unicode__(self):
539
return unicode(str(self))
540
541
542
class DBusPropertyAccessException(DBusPropertyException):
543
"""A property's access permissions disallows an operation.
544
"""
545
pass
546
547
548
class DBusPropertyNotFound(DBusPropertyException):
549
"""An attempt was made to access a non-existing property.
550
"""
551
pass
552
553
554
class DBusObjectWithProperties(dbus.service.Object):
555
"""A D-Bus object with properties.
556
557
Classes inheriting from this can use the dbus_service_property
558
decorator to expose methods as D-Bus properties. It exposes the
559
standard Get(), Set(), and GetAll() methods on the D-Bus.
560
"""
561
562
@staticmethod
563
def _is_dbus_property(obj):
564
return getattr(obj, u"_dbus_is_property", False)
565
566
def _get_all_dbus_properties(self):
567
"""Returns a generator of (name, attribute) pairs
568
"""
569
return ((prop._dbus_name, prop)
570
for name, prop in
571
inspect.getmembers(self, self._is_dbus_property))
572
573
def _get_dbus_property(self, interface_name, property_name):
574
"""Returns a bound method if one exists which is a D-Bus
575
property with the specified name and interface.
576
"""
577
for name in (property_name,
578
property_name + u"_dbus_property"):
579
prop = getattr(self, name, None)
580
if (prop is None
581
or not self._is_dbus_property(prop)
582
or prop._dbus_name != property_name
583
or (interface_name and prop._dbus_interface
584
and interface_name != prop._dbus_interface)):
585
continue
586
return prop
587
# No such property
588
raise DBusPropertyNotFound(self.dbus_object_path + u":"
589
+ interface_name + u"."
590
+ property_name)
591
592
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
593
out_signature=u"v")
594
def Get(self, interface_name, property_name):
595
"""Standard D-Bus property Get() method, see D-Bus standard.
596
"""
597
prop = self._get_dbus_property(interface_name, property_name)
598
if prop._dbus_access == u"write":
599
raise DBusPropertyAccessException(property_name)
600
value = prop()
601
if not hasattr(value, u"variant_level"):
602
return value
603
return type(value)(value, variant_level=value.variant_level+1)
604
605
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
606
def Set(self, interface_name, property_name, value):
607
"""Standard D-Bus property Set() method, see D-Bus standard.
608
"""
609
prop = self._get_dbus_property(interface_name, property_name)
610
if prop._dbus_access == u"read":
611
raise DBusPropertyAccessException(property_name)
612
if prop._dbus_get_args_options[u"byte_arrays"]:
613
# The byte_arrays option is not supported yet on
614
# signatures other than "ay".
615
if prop._dbus_signature != u"ay":
616
raise ValueError
617
value = dbus.ByteArray(''.join(unichr(byte)
618
for byte in value))
619
prop(value)
620
621
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
622
out_signature=u"a{sv}")
623
def GetAll(self, interface_name):
624
"""Standard D-Bus property GetAll() method, see D-Bus
625
standard.
626
627
Note: Will not include properties with access="write".
628
"""
629
all = {}
630
for name, prop in self._get_all_dbus_properties():
631
if (interface_name
632
and interface_name != prop._dbus_interface):
633
# Interface non-empty but did not match
634
continue
635
# Ignore write-only properties
636
if prop._dbus_access == u"write":
637
continue
638
value = prop()
639
if not hasattr(value, u"variant_level"):
640
all[name] = value
641
continue
642
all[name] = type(value)(value, variant_level=
643
value.variant_level+1)
644
return dbus.Dictionary(all, signature=u"sv")
645
646
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
647
out_signature=u"s",
648
path_keyword='object_path',
649
connection_keyword='connection')
650
def Introspect(self, object_path, connection):
651
"""Standard D-Bus method, overloaded to insert property tags.
652
"""
653
xmlstring = dbus.service.Object.Introspect(self, object_path,
654
connection)
655
try:
656
document = xml.dom.minidom.parseString(xmlstring)
657
def make_tag(document, name, prop):
658
e = document.createElement(u"property")
659
e.setAttribute(u"name", name)
660
e.setAttribute(u"type", prop._dbus_signature)
661
e.setAttribute(u"access", prop._dbus_access)
662
return e
663
for if_tag in document.getElementsByTagName(u"interface"):
664
for tag in (make_tag(document, name, prop)
665
for name, prop
666
in self._get_all_dbus_properties()
667
if prop._dbus_interface
668
== if_tag.getAttribute(u"name")):
669
if_tag.appendChild(tag)
670
# Add the names to the return values for the
671
# "org.freedesktop.DBus.Properties" methods
672
if (if_tag.getAttribute(u"name")
673
== u"org.freedesktop.DBus.Properties"):
674
for cn in if_tag.getElementsByTagName(u"method"):
675
if cn.getAttribute(u"name") == u"Get":
676
for arg in cn.getElementsByTagName(u"arg"):
677
if (arg.getAttribute(u"direction")
678
== u"out"):
679
arg.setAttribute(u"name", u"value")
680
elif cn.getAttribute(u"name") == u"GetAll":
681
for arg in cn.getElementsByTagName(u"arg"):
682
if (arg.getAttribute(u"direction")
683
== u"out"):
684
arg.setAttribute(u"name", u"props")
685
xmlstring = document.toxml(u"utf-8")
686
document.unlink()
687
except (AttributeError, xml.dom.DOMException,
688
xml.parsers.expat.ExpatError), error:
689
logger.error(u"Failed to override Introspection method",
690
error)
691
return xmlstring
692
693
694
class ClientDBus(Client, DBusObjectWithProperties):
695
"""A Client class using D-Bus
696
697
Attributes:
698
dbus_object_path: dbus.ObjectPath
699
bus: dbus.SystemBus()
700
"""
701
# dbus.service.Object doesn't use super(), so we can't either.
702
703
def __init__(self, bus = None, *args, **kwargs):
704
self._approvals_pending = 0
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
def _get_approvals_pending(self):
716
return self._approvals_pending
717
def _set_approvals_pending(self, value):
718
old_value = self._approvals_pending
719
self._approvals_pending = value
720
bval = bool(value)
721
if (hasattr(self, "dbus_object_path")
722
and bval is not bool(old_value)):
723
dbus_bool = dbus.Boolean(bval, variant_level=1)
724
self.PropertyChanged(dbus.String(u"approved_pending"),
725
dbus_bool)
726
727
approvals_pending = property(_get_approvals_pending,
728
_set_approvals_pending)
729
del _get_approvals_pending, _set_approvals_pending
730
731
@staticmethod
732
def _datetime_to_dbus(dt, variant_level=0):
733
"""Convert a UTC datetime.datetime() to a D-Bus type."""
734
return dbus.String(dt.isoformat(),
735
variant_level=variant_level)
736
737
def enable(self):
738
oldstate = getattr(self, u"enabled", False)
739
r = Client.enable(self)
740
if oldstate != self.enabled:
741
# Emit D-Bus signals
742
self.PropertyChanged(dbus.String(u"enabled"),
743
dbus.Boolean(True, variant_level=1))
744
self.PropertyChanged(
745
dbus.String(u"last_enabled"),
746
self._datetime_to_dbus(self.last_enabled,
747
variant_level=1))
748
return r
749
750
def disable(self, quiet = False):
751
oldstate = getattr(self, u"enabled", False)
752
r = Client.disable(self, quiet=quiet)
753
if not quiet and oldstate != self.enabled:
754
# Emit D-Bus signal
755
self.PropertyChanged(dbus.String(u"enabled"),
756
dbus.Boolean(False, variant_level=1))
757
return r
758
759
def __del__(self, *args, **kwargs):
760
try:
761
self.remove_from_connection()
762
except LookupError:
763
pass
764
if hasattr(DBusObjectWithProperties, u"__del__"):
765
DBusObjectWithProperties.__del__(self, *args, **kwargs)
766
Client.__del__(self, *args, **kwargs)
767
768
def checker_callback(self, pid, condition, command,
769
*args, **kwargs):
770
self.checker_callback_tag = None
771
self.checker = None
772
# Emit D-Bus signal
773
self.PropertyChanged(dbus.String(u"checker_running"),
774
dbus.Boolean(False, variant_level=1))
775
if os.WIFEXITED(condition):
776
exitstatus = os.WEXITSTATUS(condition)
777
# Emit D-Bus signal
778
self.CheckerCompleted(dbus.Int16(exitstatus),
779
dbus.Int64(condition),
780
dbus.String(command))
781
else:
782
# Emit D-Bus signal
783
self.CheckerCompleted(dbus.Int16(-1),
784
dbus.Int64(condition),
785
dbus.String(command))
786
787
return Client.checker_callback(self, pid, condition, command,
788
*args, **kwargs)
789
790
def checked_ok(self, *args, **kwargs):
791
r = Client.checked_ok(self, *args, **kwargs)
792
# Emit D-Bus signal
793
self.PropertyChanged(
794
dbus.String(u"last_checked_ok"),
795
(self._datetime_to_dbus(self.last_checked_ok,
796
variant_level=1)))
797
return r
798
799
def start_checker(self, *args, **kwargs):
800
old_checker = self.checker
801
if self.checker is not None:
802
old_checker_pid = self.checker.pid
803
else:
804
old_checker_pid = None
805
r = Client.start_checker(self, *args, **kwargs)
806
# Only if new checker process was started
807
if (self.checker is not None
808
and old_checker_pid != self.checker.pid):
809
# Emit D-Bus signal
810
self.CheckerStarted(self.current_checker_command)
811
self.PropertyChanged(
812
dbus.String(u"checker_running"),
813
dbus.Boolean(True, variant_level=1))
814
return r
815
816
def stop_checker(self, *args, **kwargs):
817
old_checker = getattr(self, u"checker", None)
818
r = Client.stop_checker(self, *args, **kwargs)
819
if (old_checker is not None
820
and getattr(self, u"checker", None) is None):
821
self.PropertyChanged(dbus.String(u"checker_running"),
822
dbus.Boolean(False, variant_level=1))
823
return r
824
825
def _reset_approved(self):
826
self._approved = None
827
return False
828
829
def approve(self, value=True):
830
self.send_changedstate()
831
self._approved = value
832
gobject.timeout_add(self._timedelta_to_milliseconds(self.approved_duration),
833
self._reset_approved)
834
835
836
## D-Bus methods, signals & properties
837
_interface = u"se.bsnet.fukt.Mandos.Client"
838
839
## Signals
840
841
# CheckerCompleted - signal
842
@dbus.service.signal(_interface, signature=u"nxs")
843
def CheckerCompleted(self, exitcode, waitstatus, command):
844
"D-Bus signal"
845
pass
846
847
# CheckerStarted - signal
848
@dbus.service.signal(_interface, signature=u"s")
849
def CheckerStarted(self, command):
850
"D-Bus signal"
851
pass
852
853
# PropertyChanged - signal
854
@dbus.service.signal(_interface, signature=u"sv")
855
def PropertyChanged(self, property, value):
856
"D-Bus signal"
857
pass
858
859
# GotSecret - signal
860
@dbus.service.signal(_interface)
861
def GotSecret(self):
862
"""D-Bus signal
863
Is sent after a successful transfer of secret from the Mandos
864
server to mandos-client
865
"""
866
pass
867
868
# Rejected - signal
869
@dbus.service.signal(_interface, signature=u"s")
870
def Rejected(self, reason):
871
"D-Bus signal"
872
pass
873
874
# NeedApproval - signal
875
@dbus.service.signal(_interface, signature=u"db")
876
def NeedApproval(self, timeout, default):
877
"D-Bus signal"
878
pass
879
880
## Methods
881
882
# Approve - method
883
@dbus.service.method(_interface, in_signature=u"b")
884
def Approve(self, value):
885
self.approve(value)
886
887
# CheckedOK - method
888
@dbus.service.method(_interface)
889
def CheckedOK(self):
890
return self.checked_ok()
891
892
# Enable - method
893
@dbus.service.method(_interface)
894
def Enable(self):
895
"D-Bus method"
896
self.enable()
897
898
# StartChecker - method
899
@dbus.service.method(_interface)
900
def StartChecker(self):
901
"D-Bus method"
902
self.start_checker()
903
904
# Disable - method
905
@dbus.service.method(_interface)
906
def Disable(self):
907
"D-Bus method"
908
self.disable()
909
910
# StopChecker - method
911
@dbus.service.method(_interface)
912
def StopChecker(self):
913
self.stop_checker()
914
915
## Properties
916
917
# approved_pending - property
918
@dbus_service_property(_interface, signature=u"b", access=u"read")
919
def approved_pending_dbus_property(self):
920
return dbus.Boolean(bool(self.approvals_pending))
921
922
# approved_by_default - property
923
@dbus_service_property(_interface, signature=u"b",
924
access=u"readwrite")
925
def approved_by_default_dbus_property(self):
926
return dbus.Boolean(self.approved_by_default)
927
928
# approved_delay - property
929
@dbus_service_property(_interface, signature=u"t",
930
access=u"readwrite")
931
def approved_delay_dbus_property(self):
932
return dbus.UInt64(self.approved_delay_milliseconds())
933
934
# approved_duration - property
935
@dbus_service_property(_interface, signature=u"t",
936
access=u"readwrite")
937
def approved_duration_dbus_property(self):
938
return dbus.UInt64(self._timedelta_to_milliseconds(
939
self.approved_duration))
940
941
# name - property
942
@dbus_service_property(_interface, signature=u"s", access=u"read")
943
def name_dbus_property(self):
944
return dbus.String(self.name)
945
946
# fingerprint - property
947
@dbus_service_property(_interface, signature=u"s", access=u"read")
948
def fingerprint_dbus_property(self):
949
return dbus.String(self.fingerprint)
950
951
# host - property
952
@dbus_service_property(_interface, signature=u"s",
953
access=u"readwrite")
954
def host_dbus_property(self, value=None):
955
if value is None: # get
956
return dbus.String(self.host)
957
self.host = value
958
# Emit D-Bus signal
959
self.PropertyChanged(dbus.String(u"host"),
960
dbus.String(value, variant_level=1))
961
962
# created - property
963
@dbus_service_property(_interface, signature=u"s", access=u"read")
964
def created_dbus_property(self):
965
return dbus.String(self._datetime_to_dbus(self.created))
966
967
# last_enabled - property
968
@dbus_service_property(_interface, signature=u"s", access=u"read")
969
def last_enabled_dbus_property(self):
970
if self.last_enabled is None:
971
return dbus.String(u"")
972
return dbus.String(self._datetime_to_dbus(self.last_enabled))
973
974
# enabled - property
975
@dbus_service_property(_interface, signature=u"b",
976
access=u"readwrite")
977
def enabled_dbus_property(self, value=None):
978
if value is None: # get
979
return dbus.Boolean(self.enabled)
980
if value:
981
self.enable()
982
else:
983
self.disable()
984
985
# last_checked_ok - property
986
@dbus_service_property(_interface, signature=u"s",
987
access=u"readwrite")
988
def last_checked_ok_dbus_property(self, value=None):
989
if value is not None:
990
self.checked_ok()
991
return
365
992
if self.last_checked_ok is None:
366
return now < (self.created + self.timeout)
367
else:
368
return now < (self.last_checked_ok + self.timeout)
369
370
371
def peer_certificate(session):
372
"Return the peer's OpenPGP certificate as a bytestring"
373
# If not an OpenPGP certificate...
374
if gnutls.library.functions.gnutls_certificate_type_get\
375
(session._c_object) \
376
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
377
# ...do the normal thing
378
return session.peer_certificate
379
list_size = ctypes.c_uint()
380
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
381
(session._c_object, ctypes.byref(list_size))
382
if list_size.value == 0:
383
return None
384
cert = cert_list[0]
385
return ctypes.string_at(cert.data, cert.size)
386
387
388
def fingerprint(openpgp):
389
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
390
# New GnuTLS "datum" with the OpenPGP public key
391
datum = gnutls.library.types.gnutls_datum_t\
392
(ctypes.cast(ctypes.c_char_p(openpgp),
393
ctypes.POINTER(ctypes.c_ubyte)),
394
ctypes.c_uint(len(openpgp)))
395
# New empty GnuTLS certificate
396
crt = gnutls.library.types.gnutls_openpgp_crt_t()
397
gnutls.library.functions.gnutls_openpgp_crt_init\
398
(ctypes.byref(crt))
399
# Import the OpenPGP public key into the certificate
400
gnutls.library.functions.gnutls_openpgp_crt_import\
401
(crt, ctypes.byref(datum),
402
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
403
# New buffer for the fingerprint
404
buffer = ctypes.create_string_buffer(20)
405
buffer_length = ctypes.c_size_t()
406
# Get the fingerprint from the certificate into the buffer
407
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
408
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
409
# Deinit the certificate
410
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
411
# Convert the buffer to a Python bytestring
412
fpr = ctypes.string_at(buffer, buffer_length.value)
413
# Convert the bytestring to hexadecimal notation
414
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
415
return hex_fpr
416
417
418
class tcp_handler(SocketServer.BaseRequestHandler, object):
419
"""A TCP request handler class.
420
Instantiated by IPv6_TCPServer for each request to handle it.
993
return dbus.String(u"")
994
return dbus.String(self._datetime_to_dbus(self
995
.last_checked_ok))
996
997
# timeout - property
998
@dbus_service_property(_interface, signature=u"t",
999
access=u"readwrite")
1000
def timeout_dbus_property(self, value=None):
1001
if value is None: # get
1002
return dbus.UInt64(self.timeout_milliseconds())
1003
self.timeout = datetime.timedelta(0, 0, 0, value)
1004
# Emit D-Bus signal
1005
self.PropertyChanged(dbus.String(u"timeout"),
1006
dbus.UInt64(value, variant_level=1))
1007
if getattr(self, u"disable_initiator_tag", None) is None:
1008
return
1009
# Reschedule timeout
1010
gobject.source_remove(self.disable_initiator_tag)
1011
self.disable_initiator_tag = None
1012
time_to_die = (self.
1013
_timedelta_to_milliseconds((self
1014
.last_checked_ok
1015
+ self.timeout)
1016
- datetime.datetime
1017
.utcnow()))
1018
if time_to_die <= 0:
1019
# The timeout has passed
1020
self.disable()
1021
else:
1022
self.disable_initiator_tag = (gobject.timeout_add
1023
(time_to_die, self.disable))
1024
1025
# interval - property
1026
@dbus_service_property(_interface, signature=u"t",
1027
access=u"readwrite")
1028
def interval_dbus_property(self, value=None):
1029
if value is None: # get
1030
return dbus.UInt64(self.interval_milliseconds())
1031
self.interval = datetime.timedelta(0, 0, 0, value)
1032
# Emit D-Bus signal
1033
self.PropertyChanged(dbus.String(u"interval"),
1034
dbus.UInt64(value, variant_level=1))
1035
if getattr(self, u"checker_initiator_tag", None) is None:
1036
return
1037
# Reschedule checker run
1038
gobject.source_remove(self.checker_initiator_tag)
1039
self.checker_initiator_tag = (gobject.timeout_add
1040
(value, self.start_checker))
1041
self.start_checker() # Start one now, too
1042
1043
# checker - property
1044
@dbus_service_property(_interface, signature=u"s",
1045
access=u"readwrite")
1046
def checker_dbus_property(self, value=None):
1047
if value is None: # get
1048
return dbus.String(self.checker_command)
1049
self.checker_command = value
1050
# Emit D-Bus signal
1051
self.PropertyChanged(dbus.String(u"checker"),
1052
dbus.String(self.checker_command,
1053
variant_level=1))
1054
1055
# checker_running - property
1056
@dbus_service_property(_interface, signature=u"b",
1057
access=u"readwrite")
1058
def checker_running_dbus_property(self, value=None):
1059
if value is None: # get
1060
return dbus.Boolean(self.checker is not None)
1061
if value:
1062
self.start_checker()
1063
else:
1064
self.stop_checker()
1065
1066
# object_path - property
1067
@dbus_service_property(_interface, signature=u"o", access=u"read")
1068
def object_path_dbus_property(self):
1069
return self.dbus_object_path # is already a dbus.ObjectPath
1070
1071
# secret = property
1072
@dbus_service_property(_interface, signature=u"ay",
1073
access=u"write", byte_arrays=True)
1074
def secret_dbus_property(self, value):
1075
self.secret = str(value)
1076
1077
del _interface
1078
1079
1080
class ProxyClient(object):
1081
def __init__(self, child_pipe, fpr, address):
1082
self._pipe = child_pipe
1083
self._pipe.send(('init', fpr, address))
1084
if not self._pipe.recv():
1085
raise KeyError()
1086
1087
def __getattribute__(self, name):
1088
if(name == '_pipe'):
1089
return super(ProxyClient, self).__getattribute__(name)
1090
self._pipe.send(('getattr', name))
1091
data = self._pipe.recv()
1092
if data[0] == 'data':
1093
return data[1]
1094
if data[0] == 'function':
1095
def func(*args, **kwargs):
1096
self._pipe.send(('funcall', name, args, kwargs))
1097
return self._pipe.recv()[1]
1098
return func
1099
1100
def __setattr__(self, name, value):
1101
if(name == '_pipe'):
1102
return super(ProxyClient, self).__setattr__(name, value)
1103
self._pipe.send(('setattr', name, value))
1104
1105
1106
class ClientHandler(socketserver.BaseRequestHandler, object):
1107
"""A class to handle client connections.
1108
1109
Instantiated once for each connection to handle it.
421
1110
Note: This will run in its own forked process."""
422
1111
423
1112
def handle(self):
424
logger.info(u"TCP connection from: %s",
425
unicode(self.client_address))
426
session = gnutls.connection.ClientSession\
427
(self.request, gnutls.connection.X509Credentials())
428
429
line = self.request.makefile().readline()
430
logger.debug(u"Protocol version: %r", line)
431
try:
432
if int(line.strip().split()[0]) > 1:
433
raise RuntimeError
434
except (ValueError, IndexError, RuntimeError), error:
435
logger.error(u"Unknown protocol version: %s", error)
436
return
437
438
# Note: gnutls.connection.X509Credentials is really a generic
439
# GnuTLS certificate credentials object so long as no X.509
440
# keys are added to it. Therefore, we can use it here despite
441
# using OpenPGP certificates.
442
443
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
444
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
445
# "+DHE-DSS"))
446
priority = "NORMAL" # Fallback default, since this
447
# MUST be set.
448
if self.server.settings["priority"]:
449
priority = self.server.settings["priority"]
450
gnutls.library.functions.gnutls_priority_set_direct\
451
(session._c_object, priority, None);
452
453
try:
454
session.handshake()
455
except gnutls.errors.GNUTLSError, error:
456
logger.warning(u"Handshake failed: %s", error)
457
# Do not run session.bye() here: the session is not
458
# established. Just abandon the request.
459
return
460
try:
461
fpr = fingerprint(peer_certificate(session))
462
except (TypeError, gnutls.errors.GNUTLSError), error:
463
logger.warning(u"Bad certificate: %s", error)
464
session.bye()
465
return
466
logger.debug(u"Fingerprint: %s", fpr)
467
client = None
468
for c in self.server.clients:
469
if c.fingerprint == fpr:
470
client = c
471
break
472
if not client:
473
logger.warning(u"Client not found for fingerprint: %s",
474
fpr)
475
session.bye()
476
return
477
# Have to check if client.still_valid(), since it is possible
478
# that the client timed out while establishing the GnuTLS
479
# session.
480
if not client.still_valid():
481
logger.warning(u"Client %(name)s is invalid",
482
vars(client))
483
session.bye()
484
return
485
sent_size = 0
486
while sent_size < len(client.secret):
487
sent = session.send(client.secret[sent_size:])
488
logger.debug(u"Sent: %d, remaining: %d",
489
sent, len(client.secret)
490
- (sent_size + sent))
491
sent_size += sent
492
session.bye()
493
494
495
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
496
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1113
with contextlib.closing(self.server.child_pipe) as child_pipe:
1114
logger.info(u"TCP connection from: %s",
1115
unicode(self.client_address))
1116
logger.debug(u"Pipe FD: %d",
1117
self.server.child_pipe.fileno())
1118
1119
session = (gnutls.connection
1120
.ClientSession(self.request,
1121
gnutls.connection
1122
.X509Credentials()))
1123
1124
# Note: gnutls.connection.X509Credentials is really a
1125
# generic GnuTLS certificate credentials object so long as
1126
# no X.509 keys are added to it. Therefore, we can use it
1127
# here despite using OpenPGP certificates.
1128
1129
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1130
# u"+AES-256-CBC", u"+SHA1",
1131
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1132
# u"+DHE-DSS"))
1133
# Use a fallback default, since this MUST be set.
1134
priority = self.server.gnutls_priority
1135
if priority is None:
1136
priority = u"NORMAL"
1137
(gnutls.library.functions
1138
.gnutls_priority_set_direct(session._c_object,
1139
priority, None))
1140
1141
# Start communication using the Mandos protocol
1142
# Get protocol number
1143
line = self.request.makefile().readline()
1144
logger.debug(u"Protocol version: %r", line)
1145
try:
1146
if int(line.strip().split()[0]) > 1:
1147
raise RuntimeError
1148
except (ValueError, IndexError, RuntimeError), error:
1149
logger.error(u"Unknown protocol version: %s", error)
1150
return
1151
1152
# Start GnuTLS connection
1153
try:
1154
session.handshake()
1155
except gnutls.errors.GNUTLSError, error:
1156
logger.warning(u"Handshake failed: %s", error)
1157
# Do not run session.bye() here: the session is not
1158
# established. Just abandon the request.
1159
return
1160
logger.debug(u"Handshake succeeded")
1161
1162
approval_required = False
1163
try:
1164
try:
1165
fpr = self.fingerprint(self.peer_certificate
1166
(session))
1167
except (TypeError, gnutls.errors.GNUTLSError), error:
1168
logger.warning(u"Bad certificate: %s", error)
1169
return
1170
logger.debug(u"Fingerprint: %s", fpr)
1171
1172
try:
1173
client = ProxyClient(child_pipe, fpr,
1174
self.client_address)
1175
except KeyError:
1176
return
1177
1178
if client.approved_delay:
1179
delay = client.approved_delay
1180
client.approvals_pending += 1
1181
approval_required = True
1182
1183
while True:
1184
if not client.enabled:
1185
logger.warning(u"Client %s is disabled",
1186
client.name)
1187
if self.server.use_dbus:
1188
# Emit D-Bus signal
1189
client.Rejected("Disabled")
1190
return
1191
1192
if client._approved or not client.approved_delay:
1193
#We are approved or approval is disabled
1194
break
1195
elif client._approved is None:
1196
logger.info(u"Client %s need approval",
1197
client.name)
1198
if self.server.use_dbus:
1199
# Emit D-Bus signal
1200
client.NeedApproval(
1201
client.approved_delay_milliseconds(),
1202
client.approved_by_default)
1203
else:
1204
logger.warning(u"Client %s was not approved",
1205
client.name)
1206
if self.server.use_dbus:
1207
# Emit D-Bus signal
1208
client.Rejected("Disapproved")
1209
return
1210
1211
#wait until timeout or approved
1212
#x = float(client._timedelta_to_milliseconds(delay))
1213
time = datetime.datetime.now()
1214
client.changedstate.acquire()
1215
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1216
client.changedstate.release()
1217
time2 = datetime.datetime.now()
1218
if (time2 - time) >= delay:
1219
if not client.approved_by_default:
1220
logger.warning("Client %s timed out while"
1221
" waiting for approval",
1222
client.name)
1223
if self.server.use_dbus:
1224
# Emit D-Bus signal
1225
client.Rejected("Time out")
1226
return
1227
else:
1228
break
1229
else:
1230
delay -= time2 - time
1231
1232
sent_size = 0
1233
while sent_size < len(client.secret):
1234
try:
1235
sent = session.send(client.secret[sent_size:])
1236
except (gnutls.errors.GNUTLSError), error:
1237
logger.warning("gnutls send failed")
1238
return
1239
logger.debug(u"Sent: %d, remaining: %d",
1240
sent, len(client.secret)
1241
- (sent_size + sent))
1242
sent_size += sent
1243
1244
logger.info(u"Sending secret to %s", client.name)
1245
# bump the timeout as if seen
1246
client.checked_ok()
1247
if self.server.use_dbus:
1248
# Emit D-Bus signal
1249
client.GotSecret()
1250
1251
finally:
1252
if approval_required:
1253
client.approvals_pending -= 1
1254
try:
1255
session.bye()
1256
except (gnutls.errors.GNUTLSError), error:
1257
logger.warning("gnutls bye failed")
1258
1259
@staticmethod
1260
def peer_certificate(session):
1261
"Return the peer's OpenPGP certificate as a bytestring"
1262
# If not an OpenPGP certificate...
1263
if (gnutls.library.functions
1264
.gnutls_certificate_type_get(session._c_object)
1265
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1266
# ...do the normal thing
1267
return session.peer_certificate
1268
list_size = ctypes.c_uint(1)
1269
cert_list = (gnutls.library.functions
1270
.gnutls_certificate_get_peers
1271
(session._c_object, ctypes.byref(list_size)))
1272
if not bool(cert_list) and list_size.value != 0:
1273
raise gnutls.errors.GNUTLSError(u"error getting peer"
1274
u" certificate")
1275
if list_size.value == 0:
1276
return None
1277
cert = cert_list[0]
1278
return ctypes.string_at(cert.data, cert.size)
1279
1280
@staticmethod
1281
def fingerprint(openpgp):
1282
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1283
# New GnuTLS "datum" with the OpenPGP public key
1284
datum = (gnutls.library.types
1285
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1286
ctypes.POINTER
1287
(ctypes.c_ubyte)),
1288
ctypes.c_uint(len(openpgp))))
1289
# New empty GnuTLS certificate
1290
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1291
(gnutls.library.functions
1292
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1293
# Import the OpenPGP public key into the certificate
1294
(gnutls.library.functions
1295
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1296
gnutls.library.constants
1297
.GNUTLS_OPENPGP_FMT_RAW))
1298
# Verify the self signature in the key
1299
crtverify = ctypes.c_uint()
1300
(gnutls.library.functions
1301
.gnutls_openpgp_crt_verify_self(crt, 0,
1302
ctypes.byref(crtverify)))
1303
if crtverify.value != 0:
1304
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1305
raise (gnutls.errors.CertificateSecurityError
1306
(u"Verify failed"))
1307
# New buffer for the fingerprint
1308
buf = ctypes.create_string_buffer(20)
1309
buf_len = ctypes.c_size_t()
1310
# Get the fingerprint from the certificate into the buffer
1311
(gnutls.library.functions
1312
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1313
ctypes.byref(buf_len)))
1314
# Deinit the certificate
1315
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1316
# Convert the buffer to a Python bytestring
1317
fpr = ctypes.string_at(buf, buf_len.value)
1318
# Convert the bytestring to hexadecimal notation
1319
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1320
return hex_fpr
1321
1322
1323
class MultiprocessingMixIn(object):
1324
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1325
def sub_process_main(self, request, address):
1326
try:
1327
self.finish_request(request, address)
1328
except:
1329
self.handle_error(request, address)
1330
self.close_request(request)
1331
1332
def process_request(self, request, address):
1333
"""Start a new process to process the request."""
1334
multiprocessing.Process(target = self.sub_process_main,
1335
args = (request, address)).start()
1336
1337
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1338
""" adds a pipe to the MixIn """
1339
def process_request(self, request, client_address):
1340
"""Overrides and wraps the original process_request().
1341
1342
This function creates a new pipe in self.pipe
1343
"""
1344
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1345
1346
super(MultiprocessingMixInWithPipe,
1347
self).process_request(request, client_address)
1348
self.child_pipe.close()
1349
self.add_pipe(parent_pipe)
1350
1351
def add_pipe(self, parent_pipe):
1352
"""Dummy function; override as necessary"""
1353
pass
1354
1355
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1356
socketserver.TCPServer, object):
1357
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1358
497
1359
Attributes:
498
settings: Server settings
499
clients: Set() of Client objects
1360
enabled: Boolean; whether this server is activated yet
1361
interface: None or a network interface name (string)
1362
use_ipv6: Boolean; to use IPv6 or not
500
1363
"""
501
address_family = socket.AF_INET6
502
def __init__(self, *args, **kwargs):
503
if "settings" in kwargs:
504
self.settings = kwargs["settings"]
505
del kwargs["settings"]
506
if "clients" in kwargs:
507
self.clients = kwargs["clients"]
508
del kwargs["clients"]
509
return super(type(self), self).__init__(*args, **kwargs)
1364
def __init__(self, server_address, RequestHandlerClass,
1365
interface=None, use_ipv6=True):
1366
self.interface = interface
1367
if use_ipv6:
1368
self.address_family = socket.AF_INET6
1369
socketserver.TCPServer.__init__(self, server_address,
1370
RequestHandlerClass)
510
1371
def server_bind(self):
511
1372
"""This overrides the normal server_bind() function
512
1373
to bind to an interface if one was specified, and also NOT to
513
1374
bind to an address or port if they were not specified."""
514
if self.settings["interface"]:
515
# 25 is from /usr/include/asm-i486/socket.h
516
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
517
try:
518
self.socket.setsockopt(socket.SOL_SOCKET,
519
SO_BINDTODEVICE,
520
self.settings["interface"])
521
except socket.error, error:
522
if error[0] == errno.EPERM:
523
logger.error(u"No permission to"
524
u" bind to interface %s",
525
self.settings["interface"])
526
else:
527
raise error
1375
if self.interface is not None:
1376
if SO_BINDTODEVICE is None:
1377
logger.error(u"SO_BINDTODEVICE does not exist;"
1378
u" cannot bind to interface %s",
1379
self.interface)
1380
else:
1381
try:
1382
self.socket.setsockopt(socket.SOL_SOCKET,
1383
SO_BINDTODEVICE,
1384
str(self.interface
1385
+ u'\0'))
1386
except socket.error, error:
1387
if error[0] == errno.EPERM:
1388
logger.error(u"No permission to"
1389
u" bind to interface %s",
1390
self.interface)
1391
elif error[0] == errno.ENOPROTOOPT:
1392
logger.error(u"SO_BINDTODEVICE not available;"
1393
u" cannot bind to interface %s",
1394
self.interface)
1395
else:
1396
raise
528
1397
# Only bind(2) the socket if we really need to.
529
1398
if self.server_address[0] or self.server_address[1]:
530
1399
if not self.server_address[0]:
531
in6addr_any = "::"
532
self.server_address = (in6addr_any,
1400
if self.address_family == socket.AF_INET6:
1401
any_address = u"::" # in6addr_any
1402
else:
1403
any_address = socket.INADDR_ANY
1404
self.server_address = (any_address,
533
1405
self.server_address[1])
534
1406
elif not self.server_address[1]:
535
1407
self.server_address = (self.server_address[0],
536
1408
0)
537
# if self.settings["interface"]:
1409
# if self.interface:
538
1410
# self.server_address = (self.server_address[0],
539
1411
# 0, # port
540
1412
# 0, # flowinfo
541
1413
# if_nametoindex
542
# (self.settings
543
# ["interface"]))
544
return super(type(self), self).server_bind()
1414
# (self.interface))
1415
return socketserver.TCPServer.server_bind(self)
1416
1417
1418
class MandosServer(IPv6_TCPServer):
1419
"""Mandos server.
1420
1421
Attributes:
1422
clients: set of Client objects
1423
gnutls_priority GnuTLS priority string
1424
use_dbus: Boolean; to emit D-Bus signals or not
1425
1426
Assumes a gobject.MainLoop event loop.
1427
"""
1428
def __init__(self, server_address, RequestHandlerClass,
1429
interface=None, use_ipv6=True, clients=None,
1430
gnutls_priority=None, use_dbus=True):
1431
self.enabled = False
1432
self.clients = clients
1433
if self.clients is None:
1434
self.clients = set()
1435
self.use_dbus = use_dbus
1436
self.gnutls_priority = gnutls_priority
1437
IPv6_TCPServer.__init__(self, server_address,
1438
RequestHandlerClass,
1439
interface = interface,
1440
use_ipv6 = use_ipv6)
1441
def server_activate(self):
1442
if self.enabled:
1443
return socketserver.TCPServer.server_activate(self)
1444
def enable(self):
1445
self.enabled = True
1446
def add_pipe(self, parent_pipe):
1447
# Call "handle_ipc" for both data and EOF events
1448
gobject.io_add_watch(parent_pipe.fileno(),
1449
gobject.IO_IN | gobject.IO_HUP,
1450
functools.partial(self.handle_ipc,
1451
parent_pipe = parent_pipe))
1452
1453
def handle_ipc(self, source, condition, parent_pipe=None,
1454
client_object=None):
1455
condition_names = {
1456
gobject.IO_IN: u"IN", # There is data to read.
1457
gobject.IO_OUT: u"OUT", # Data can be written (without
1458
# blocking).
1459
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1460
gobject.IO_ERR: u"ERR", # Error condition.
1461
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1462
# broken, usually for pipes and
1463
# sockets).
1464
}
1465
conditions_string = ' | '.join(name
1466
for cond, name in
1467
condition_names.iteritems()
1468
if cond & condition)
1469
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1470
conditions_string)
1471
1472
# error or the other end of multiprocessing.Pipe has closed
1473
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1474
return False
1475
1476
# Read a request from the child
1477
request = parent_pipe.recv()
1478
logger.debug(u"IPC request: %s", repr(request))
1479
command = request[0]
1480
1481
if command == 'init':
1482
fpr = request[1]
1483
address = request[2]
1484
1485
for c in self.clients:
1486
if c.fingerprint == fpr:
1487
client = c
1488
break
1489
else:
1490
logger.warning(u"Client not found for fingerprint: %s, ad"
1491
u"dress: %s", fpr, address)
1492
if self.use_dbus:
1493
# Emit D-Bus signal
1494
mandos_dbus_service.ClientNotFound(fpr, address)
1495
parent_pipe.send(False)
1496
return False
1497
1498
gobject.io_add_watch(parent_pipe.fileno(),
1499
gobject.IO_IN | gobject.IO_HUP,
1500
functools.partial(self.handle_ipc,
1501
parent_pipe = parent_pipe,
1502
client_object = client))
1503
parent_pipe.send(True)
1504
# remove the old hook in favor of the new above hook on same fileno
1505
return False
1506
if command == 'funcall':
1507
funcname = request[1]
1508
args = request[2]
1509
kwargs = request[3]
1510
1511
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1512
1513
if command == 'getattr':
1514
attrname = request[1]
1515
if callable(client_object.__getattribute__(attrname)):
1516
parent_pipe.send(('function',))
1517
else:
1518
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1519
1520
if command == 'setattr':
1521
attrname = request[1]
1522
value = request[2]
1523
setattr(client_object, attrname, value)
1524
1525
return True
545
1526
546
1527
547
1528
def string_to_delta(interval):
548
1529
"""Parse a string and return a datetime.timedelta
549
550
>>> string_to_delta('7d')
1530
1531
>>> string_to_delta(u'7d')
551
1532
datetime.timedelta(7)
552
>>> string_to_delta('60s')
1533
>>> string_to_delta(u'60s')
553
1534
datetime.timedelta(0, 60)
554
>>> string_to_delta('60m')
1535
>>> string_to_delta(u'60m')
555
1536
datetime.timedelta(0, 3600)
556
>>> string_to_delta('24h')
1537
>>> string_to_delta(u'24h')
557
1538
datetime.timedelta(1)
558
1539
>>> string_to_delta(u'1w')
559
1540
datetime.timedelta(7)
1541
>>> string_to_delta(u'5m 30s')
1542
datetime.timedelta(0, 330)
560
1543
"""
561
try:
562
suffix=unicode(interval[-1])
563
value=int(interval[:-1])
564
if suffix == u"d":
565
delta = datetime.timedelta(value)
566
elif suffix == u"s":
567
delta = datetime.timedelta(0, value)
568
elif suffix == u"m":
569
delta = datetime.timedelta(0, 0, 0, 0, value)
570
elif suffix == u"h":
571
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
572
elif suffix == u"w":
573
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
574
else:
575
raise ValueError
576
except (ValueError, IndexError):
577
raise ValueError
578
return delta
579
580
581
def server_state_changed(state):
582
"""Derived from the Avahi example code"""
583
if state == avahi.SERVER_COLLISION:
584
logger.error(u"Server name collision")
585
service.remove()
586
elif state == avahi.SERVER_RUNNING:
587
service.add()
588
589
590
def entry_group_state_changed(state, error):
591
"""Derived from the Avahi example code"""
592
logger.debug(u"state change: %i", state)
593
594
if state == avahi.ENTRY_GROUP_ESTABLISHED:
595
logger.debug(u"Service established.")
596
elif state == avahi.ENTRY_GROUP_COLLISION:
597
logger.warning(u"Service name collision.")
598
service.rename()
599
elif state == avahi.ENTRY_GROUP_FAILURE:
600
logger.critical(u"Error in group state changed %s",
601
unicode(error))
602
raise AvahiGroupError("State changed: %s", str(error))
1544
timevalue = datetime.timedelta(0)
1545
for s in interval.split():
1546
try:
1547
suffix = unicode(s[-1])
1548
value = int(s[:-1])
1549
if suffix == u"d":
1550
delta = datetime.timedelta(value)
1551
elif suffix == u"s":
1552
delta = datetime.timedelta(0, value)
1553
elif suffix == u"m":
1554
delta = datetime.timedelta(0, 0, 0, 0, value)
1555
elif suffix == u"h":
1556
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1557
elif suffix == u"w":
1558
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1559
else:
1560
raise ValueError(u"Unknown suffix %r" % suffix)
1561
except (ValueError, IndexError), e:
1562
raise ValueError(e.message)
1563
timevalue += delta
1564
return timevalue
1565
603
1566
604
1567
def if_nametoindex(interface):
605
"""Call the C function if_nametoindex(), or equivalent"""
1568
"""Call the C function if_nametoindex(), or equivalent
1569
1570
Note: This function cannot accept a unicode string."""
606
1571
global if_nametoindex
607
1572
try:
608
if "ctypes.util" not in sys.modules:
609
import ctypes.util
610
if_nametoindex = ctypes.cdll.LoadLibrary\
611
(ctypes.util.find_library("c")).if_nametoindex
1573
if_nametoindex = (ctypes.cdll.LoadLibrary
1574
(ctypes.util.find_library(u"c"))
1575
.if_nametoindex)
612
1576
except (OSError, AttributeError):
613
if "struct" not in sys.modules:
614
import struct
615
if "fcntl" not in sys.modules:
616
import fcntl
1577
logger.warning(u"Doing if_nametoindex the hard way")
617
1578
def if_nametoindex(interface):
618
1579
"Get an interface index the hard way, i.e. using fcntl()"
619
1580
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
620
s = socket.socket()
621
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
622
struct.pack("16s16x", interface))
623
s.close()
624
interface_index = struct.unpack("I", ifreq[16:20])[0]
1581
with contextlib.closing(socket.socket()) as s:
1582
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1583
struct.pack(str(u"16s16x"),
1584
interface))
1585
interface_index = struct.unpack(str(u"I"),
1586
ifreq[16:20])[0]
625
1587
return interface_index
626
1588
return if_nametoindex(interface)
627
1589
628
1590
629
1591
def daemon(nochdir = False, noclose = False):
630
1592
"""See daemon(3). Standard BSD Unix function.
1593
631
1594
This should really exist as os.daemon, but it doesn't (yet)."""
632
1595
if os.fork():
633
1596
sys.exit()
634
1597
os.setsid()
635
1598
if not nochdir:
636
os.chdir("/")
1599
os.chdir(u"/")
637
1600
if os.fork():
638
1601
sys.exit()
639
1602
if not noclose:
641
1604
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
642
1605
if not stat.S_ISCHR(os.fstat(null).st_mode):
643
1606
raise OSError(errno.ENODEV,
644
"/dev/null not a character device")
1607
u"%s not a character device"
1608
% os.path.devnull)
645
1609
os.dup2(null, sys.stdin.fileno())
646
1610
os.dup2(null, sys.stdout.fileno())
647
1611
os.dup2(null, sys.stderr.fileno())
650
1614
651
1615
652
1616
def main():
653
global main_loop_started
654
main_loop_started = False
655
656
parser = OptionParser()
657
parser.add_option("-i", "--interface", type="string",
658
metavar="IF", help="Bind to interface IF")
659
parser.add_option("-a", "--address", type="string",
660
help="Address to listen for requests on")
661
parser.add_option("-p", "--port", type="int",
662
help="Port number to receive requests on")
663
parser.add_option("--check", action="store_true", default=False,
664
help="Run self-test")
665
parser.add_option("--debug", action="store_true",
666
help="Debug mode; run in foreground and log to"
667
" terminal")
668
parser.add_option("--priority", type="string", help="GnuTLS"
669
" priority string (see GnuTLS documentation)")
670
parser.add_option("--servicename", type="string", metavar="NAME",
671
help="Zeroconf service name")
672
parser.add_option("--configdir", type="string",
673
default="/etc/mandos", metavar="DIR",
674
help="Directory to search for configuration"
675
" files")
676
(options, args) = parser.parse_args()
1617
1618
##################################################################
1619
# Parsing of options, both command line and config file
1620
1621
parser = optparse.OptionParser(version = "%%prog %s" % version)
1622
parser.add_option("-i", u"--interface", type=u"string",
1623
metavar="IF", help=u"Bind to interface IF")
1624
parser.add_option("-a", u"--address", type=u"string",
1625
help=u"Address to listen for requests on")
1626
parser.add_option("-p", u"--port", type=u"int",
1627
help=u"Port number to receive requests on")
1628
parser.add_option("--check", action=u"store_true",
1629
help=u"Run self-test")
1630
parser.add_option("--debug", action=u"store_true",
1631
help=u"Debug mode; run in foreground and log to"
1632
u" terminal")
1633
parser.add_option("--debuglevel", type=u"string", metavar="Level",
1634
help=u"Debug level for stdout output")
1635
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1636
u" priority string (see GnuTLS documentation)")
1637
parser.add_option("--servicename", type=u"string",
1638
metavar=u"NAME", help=u"Zeroconf service name")
1639
parser.add_option("--configdir", type=u"string",
1640
default=u"/etc/mandos", metavar=u"DIR",
1641
help=u"Directory to search for configuration"
1642
u" files")
1643
parser.add_option("--no-dbus", action=u"store_false",
1644
dest=u"use_dbus", help=u"Do not provide D-Bus"
1645
u" system bus interface")
1646
parser.add_option("--no-ipv6", action=u"store_false",
1647
dest=u"use_ipv6", help=u"Do not use IPv6")
1648
options = parser.parse_args()[0]
677
1649
678
1650
if options.check:
679
1651
import doctest
681
1653
sys.exit()
682
1654
683
1655
# Default values for config file for server-global settings
684
server_defaults = { "interface": "",
685
"address": "",
686
"port": "",
687
"debug": "False",
688
"priority":
689
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
690
"servicename": "Mandos",
1656
server_defaults = { u"interface": u"",
1657
u"address": u"",
1658
u"port": u"",
1659
u"debug": u"False",
1660
u"priority":
1661
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1662
u"servicename": u"Mandos",
1663
u"use_dbus": u"True",
1664
u"use_ipv6": u"True",
1665
u"debuglevel": u"",
691
1666
}
692
1667
693
1668
# Parse config file for server-global settings
694
server_config = ConfigParser.SafeConfigParser(server_defaults)
1669
server_config = configparser.SafeConfigParser(server_defaults)
695
1670
del server_defaults
696
server_config.read(os.path.join(options.configdir, "mandos.conf"))
697
server_section = "server"
1671
server_config.read(os.path.join(options.configdir,
1672
u"mandos.conf"))
698
1673
# Convert the SafeConfigParser object to a dict
699
server_settings = dict(server_config.items(server_section))
700
# Use getboolean on the boolean config option
701
server_settings["debug"] = server_config.getboolean\
702
(server_section, "debug")
1674
server_settings = server_config.defaults()
1675
# Use the appropriate methods on the non-string config options
1676
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1677
server_settings[option] = server_config.getboolean(u"DEFAULT",
1678
option)
1679
if server_settings["port"]:
1680
server_settings["port"] = server_config.getint(u"DEFAULT",
1681
u"port")
703
1682
del server_config
704
1683
705
1684
# Override the settings from the config file with command line
706
1685
# options, if set.
707
for option in ("interface", "address", "port", "debug",
708
"priority", "servicename", "configdir"):
1686
for option in (u"interface", u"address", u"port", u"debug",
1687
u"priority", u"servicename", u"configdir",
1688
u"use_dbus", u"use_ipv6", u"debuglevel"):
709
1689
value = getattr(options, option)
710
1690
if value is not None:
711
1691
server_settings[option] = value
712
1692
del options
1693
# Force all strings to be unicode
1694
for option in server_settings.keys():
1695
if type(server_settings[option]) is str:
1696
server_settings[option] = unicode(server_settings[option])
713
1697
# Now we have our good server settings in "server_settings"
714
1698
715
debug = server_settings["debug"]
716
717
if not debug:
1699
##################################################################
1700
1701
# For convenience
1702
debug = server_settings[u"debug"]
1703
debuglevel = server_settings[u"debuglevel"]
1704
use_dbus = server_settings[u"use_dbus"]
1705
use_ipv6 = server_settings[u"use_ipv6"]
1706
1707
if server_settings[u"servicename"] != u"Mandos":
1708
syslogger.setFormatter(logging.Formatter
1709
(u'Mandos (%s) [%%(process)d]:'
1710
u' %%(levelname)s: %%(message)s'
1711
% server_settings[u"servicename"]))
1712
1713
# Parse config file with clients
1714
client_defaults = { u"timeout": u"1h",
1715
u"interval": u"5m",
1716
u"checker": u"fping -q -- %%(host)s",
1717
u"host": u"",
1718
u"approved_delay": u"0s",
1719
u"approved_duration": u"1s",
1720
}
1721
client_config = configparser.SafeConfigParser(client_defaults)
1722
client_config.read(os.path.join(server_settings[u"configdir"],
1723
u"clients.conf"))
1724
1725
global mandos_dbus_service
1726
mandos_dbus_service = None
1727
1728
tcp_server = MandosServer((server_settings[u"address"],
1729
server_settings[u"port"]),
1730
ClientHandler,
1731
interface=server_settings[u"interface"],
1732
use_ipv6=use_ipv6,
1733
gnutls_priority=
1734
server_settings[u"priority"],
1735
use_dbus=use_dbus)
1736
pidfilename = u"/var/run/mandos.pid"
1737
try:
1738
pidfile = open(pidfilename, u"w")
1739
except IOError:
1740
logger.error(u"Could not open file %r", pidfilename)
1741
1742
try:
1743
uid = pwd.getpwnam(u"_mandos").pw_uid
1744
gid = pwd.getpwnam(u"_mandos").pw_gid
1745
except KeyError:
1746
try:
1747
uid = pwd.getpwnam(u"mandos").pw_uid
1748
gid = pwd.getpwnam(u"mandos").pw_gid
1749
except KeyError:
1750
try:
1751
uid = pwd.getpwnam(u"nobody").pw_uid
1752
gid = pwd.getpwnam(u"nobody").pw_gid
1753
except KeyError:
1754
uid = 65534
1755
gid = 65534
1756
try:
1757
os.setgid(gid)
1758
os.setuid(uid)
1759
except OSError, error:
1760
if error[0] != errno.EPERM:
1761
raise error
1762
1763
# Enable all possible GnuTLS debugging
1764
1765
1766
if not debug and not debuglevel:
718
1767
syslogger.setLevel(logging.WARNING)
719
720
if server_settings["servicename"] != "Mandos":
721
syslogger.setFormatter(logging.Formatter\
722
('Mandos (%s): %%(levelname)s:'
723
' %%(message)s'
724
% server_settings["servicename"]))
725
726
# Parse config file with clients
727
client_defaults = { "timeout": "1h",
728
"interval": "5m",
729
"checker": "fping -q -- %%(host)s",
730
}
731
client_config = ConfigParser.SafeConfigParser(client_defaults)
732
client_config.read(os.path.join(server_settings["configdir"],
733
"clients.conf"))
734
735
global service
736
service = AvahiService(name = server_settings["servicename"],
737
type = "_mandos._tcp", );
738
if server_settings["interface"]:
739
service.interface = if_nametoindex(server_settings["interface"])
1768
console.setLevel(logging.WARNING)
1769
if debuglevel:
1770
level = getattr(logging, debuglevel.upper())
1771
syslogger.setLevel(level)
1772
console.setLevel(level)
1773
1774
if debug:
1775
# "Use a log level over 10 to enable all debugging options."
1776
# - GnuTLS manual
1777
gnutls.library.functions.gnutls_global_set_log_level(11)
1778
1779
@gnutls.library.types.gnutls_log_func
1780
def debug_gnutls(level, string):
1781
logger.debug(u"GnuTLS: %s", string[:-1])
1782
1783
(gnutls.library.functions
1784
.gnutls_global_set_log_function(debug_gnutls))
1785
1786
# Redirect stdin so all checkers get /dev/null
1787
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1788
os.dup2(null, sys.stdin.fileno())
1789
if null > 2:
1790
os.close(null)
1791
else:
1792
# No console logging
1793
logger.removeHandler(console)
1794
740
1795
741
1796
global main_loop
742
global bus
743
global server
744
1797
# From the Avahi example code
745
1798
DBusGMainLoop(set_as_default=True )
746
1799
main_loop = gobject.MainLoop()
747
1800
bus = dbus.SystemBus()
748
server = dbus.Interface(
749
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
750
avahi.DBUS_INTERFACE_SERVER )
751
1801
# End of Avahi example code
752
753
if debug:
754
console = logging.StreamHandler()
755
# console.setLevel(logging.DEBUG)
756
console.setFormatter(logging.Formatter\
757
('%(levelname)s: %(message)s'))
758
logger.addHandler(console)
759
del console
760
761
clients = Set()
762
def remove_from_clients(client):
763
clients.remove(client)
764
if not clients:
765
logger.critical(u"No clients left, exiting")
766
sys.exit()
767
768
clients.update(Set(Client(name = section,
769
stop_hook = remove_from_clients,
770
config
771
= dict(client_config.items(section)))
772
for section in client_config.sections()))
773
if not clients:
774
logger.critical(u"No clients defined")
775
sys.exit(1)
776
1802
if use_dbus:
1803
try:
1804
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1805
bus, do_not_queue=True)
1806
except dbus.exceptions.NameExistsException, e:
1807
logger.error(unicode(e) + u", disabling D-Bus")
1808
use_dbus = False
1809
server_settings[u"use_dbus"] = False
1810
tcp_server.use_dbus = False
1811
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1812
service = AvahiService(name = server_settings[u"servicename"],
1813
servicetype = u"_mandos._tcp",
1814
protocol = protocol, bus = bus)
1815
if server_settings["interface"]:
1816
service.interface = (if_nametoindex
1817
(str(server_settings[u"interface"])))
1818
777
1819
if not debug:
1820
# Close all input and output, do double fork, etc.
778
1821
daemon()
779
780
pidfilename = "/var/run/mandos/mandos.pid"
781
pid = os.getpid()
1822
1823
global multiprocessing_manager
1824
multiprocessing_manager = multiprocessing.Manager()
1825
1826
client_class = Client
1827
if use_dbus:
1828
client_class = functools.partial(ClientDBus, bus = bus)
1829
def client_config_items(config, section):
1830
special_settings = {
1831
"approved_by_default":
1832
lambda: config.getboolean(section,
1833
"approved_by_default"),
1834
}
1835
for name, value in config.items(section):
1836
try:
1837
yield (name, special_settings[name]())
1838
except KeyError:
1839
yield (name, value)
1840
1841
tcp_server.clients.update(set(
1842
client_class(name = section,
1843
config= dict(client_config_items(
1844
client_config, section)))
1845
for section in client_config.sections()))
1846
if not tcp_server.clients:
1847
logger.warning(u"No clients defined")
1848
782
1849
try:
783
pidfile = open(pidfilename, "w")
784
pidfile.write(str(pid) + "\n")
785
pidfile.close()
1850
with pidfile:
1851
pid = os.getpid()
1852
pidfile.write(str(pid) + "\n")
786
1853
del pidfile
787
except IOError, err:
788
logger.error(u"Could not write %s file with PID %d",
789
pidfilename, os.getpid())
1854
except IOError:
1855
logger.error(u"Could not write to file %r with PID %d",
1856
pidfilename, pid)
1857
except NameError:
1858
# "pidfile" was never created
1859
pass
1860
del pidfilename
1861
1862
if not debug:
1863
signal.signal(signal.SIGINT, signal.SIG_IGN)
1864
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1865
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1866
1867
if use_dbus:
1868
class MandosDBusService(dbus.service.Object):
1869
"""A D-Bus proxy object"""
1870
def __init__(self):
1871
dbus.service.Object.__init__(self, bus, u"/")
1872
_interface = u"se.bsnet.fukt.Mandos"
1873
1874
@dbus.service.signal(_interface, signature=u"o")
1875
def ClientAdded(self, objpath):
1876
"D-Bus signal"
1877
pass
1878
1879
@dbus.service.signal(_interface, signature=u"ss")
1880
def ClientNotFound(self, fingerprint, address):
1881
"D-Bus signal"
1882
pass
1883
1884
@dbus.service.signal(_interface, signature=u"os")
1885
def ClientRemoved(self, objpath, name):
1886
"D-Bus signal"
1887
pass
1888
1889
@dbus.service.method(_interface, out_signature=u"ao")
1890
def GetAllClients(self):
1891
"D-Bus method"
1892
return dbus.Array(c.dbus_object_path
1893
for c in tcp_server.clients)
1894
1895
@dbus.service.method(_interface,
1896
out_signature=u"a{oa{sv}}")
1897
def GetAllClientsWithProperties(self):
1898
"D-Bus method"
1899
return dbus.Dictionary(
1900
((c.dbus_object_path, c.GetAll(u""))
1901
for c in tcp_server.clients),
1902
signature=u"oa{sv}")
1903
1904
@dbus.service.method(_interface, in_signature=u"o")
1905
def RemoveClient(self, object_path):
1906
"D-Bus method"
1907
for c in tcp_server.clients:
1908
if c.dbus_object_path == object_path:
1909
tcp_server.clients.remove(c)
1910
c.remove_from_connection()
1911
# Don't signal anything except ClientRemoved
1912
c.disable(quiet=True)
1913
# Emit D-Bus signal
1914
self.ClientRemoved(object_path, c.name)
1915
return
1916
raise KeyError(object_path)
1917
1918
del _interface
1919
1920
mandos_dbus_service = MandosDBusService()
790
1921
791
1922
def cleanup():
792
1923
"Cleanup function; run on exit"
793
global group
794
# From the Avahi example code
795
if not group is None:
796
group.Free()
797
group = None
798
# End of Avahi example code
1924
service.cleanup()
799
1925
800
while clients:
801
client = clients.pop()
802
client.stop_hook = None
803
client.stop()
1926
while tcp_server.clients:
1927
client = tcp_server.clients.pop()
1928
if use_dbus:
1929
client.remove_from_connection()
1930
client.disable_hook = None
1931
# Don't signal anything except ClientRemoved
1932
client.disable(quiet=True)
1933
if use_dbus:
1934
# Emit D-Bus signal
1935
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1936
client.name)
804
1937
805
1938
atexit.register(cleanup)
806
1939
807
if not debug:
808
signal.signal(signal.SIGINT, signal.SIG_IGN)
809
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
810
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
811
812
for client in clients:
813
client.start()
814
815
tcp_server = IPv6_TCPServer((server_settings["address"],
816
server_settings["port"]),
817
tcp_handler,
818
settings=server_settings,
819
clients=clients)
1940
for client in tcp_server.clients:
1941
if use_dbus:
1942
# Emit D-Bus signal
1943
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1944
client.enable()
1945
1946
tcp_server.enable()
1947
tcp_server.server_activate()
1948
820
1949
# Find out what port we got
821
1950
service.port = tcp_server.socket.getsockname()[1]
822
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
823
u" scope_id %d" % tcp_server.socket.getsockname())
1951
if use_ipv6:
1952
logger.info(u"Now listening on address %r, port %d,"
1953
" flowinfo %d, scope_id %d"
1954
% tcp_server.socket.getsockname())
1955
else: # IPv4
1956
logger.info(u"Now listening on address %r, port %d"
1957
% tcp_server.socket.getsockname())
824
1958
825
1959
#service.interface = tcp_server.socket.getsockname()[3]
826
1960
827
1961
try:
828
1962
# From the Avahi example code
829
server.connect_to_signal("StateChanged", server_state_changed)
830
1963
try:
831
server_state_changed(server.GetState())
1964
service.activate()
832
1965
except dbus.exceptions.DBusException, error:
833
1966
logger.critical(u"DBusException: %s", error)
1967
cleanup()
834
1968
sys.exit(1)
835
1969
# End of Avahi example code
836
1970
837
1971
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
838
1972
lambda *args, **kwargs:
839
tcp_server.handle_request\
840
(*args[2:], **kwargs) or True)
1973
(tcp_server.handle_request
1974
(*args[2:], **kwargs) or True))
841
1975
842
1976
logger.debug(u"Starting main loop")
843
main_loop_started = True
844
1977
main_loop.run()
845
1978
except AvahiError, error:
846
logger.critical(u"AvahiError: %s" + unicode(error))
1979
logger.critical(u"AvahiError: %s", error)
1980
cleanup()
847
1981
sys.exit(1)
848
1982
except KeyboardInterrupt:
849
1983
if debug:
850
print
1984
print >> sys.stderr
1985
logger.debug(u"Server received KeyboardInterrupt")
1986
logger.debug(u"Server exiting")
1987
# Must run before the D-Bus bus name gets deregistered
1988
cleanup()
851
1989
852
1990
if __name__ == '__main__':
853
1991
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0