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- Committer: Teddy Hogeborn
- Date: 2010-10-02 17:41:05 UTC
- mto: (24.1.169 mandos)
- mto: This revision was merged to the branch mainline in revision 453.
- Revision ID: teddy@fukt.bsnet.se-20101002174105-xfqa0j8y1puvedo3
* debian/source/format: New; contains "3.0 (quilt)".
- files added:
- DBUS-API
- debian/source
- files modified:
- .bzrignore
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
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# methods "add", "remove", "server_state_changed",
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# "entry_group_state_changed", "cleanup", and "activate" in the
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# "AvahiService" class, and some lines in "main".
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12
#
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# Everything else is
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# Copyright © 2008,2009 Teddy Hogeborn
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# Copyright © 2008,2009 Björn Påhlsson
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# Copyright © 2008-2010 Teddy Hogeborn
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# Copyright © 2008-2010 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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18
# it under the terms of the GNU General Public License as published by
33
33
34
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from __future__ import division, with_statement, absolute_import
35
35
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import SocketServer
36
import SocketServer as socketserver
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import socket
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import optparse
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import datetime
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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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57
import pwd
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from contextlib import closing
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import contextlib
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import struct
60
import fcntl
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import functools
62
import cPickle as pickle
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import multiprocessing
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64
61
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import dbus
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import dbus.service
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69
from dbus.mainloop.glib import DBusGMainLoop
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70
import ctypes
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import ctypes.util
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version = "1.0.5"
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logger = logging.Logger('mandos')
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import xml.dom.minidom
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import inspect
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75
try:
76
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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83
84
version = "1.2"
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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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90
address = "/dev/log"))
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91
syslogger.setFormatter(logging.Formatter
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('Mandos [%(process)d]: %(levelname)s:'
77
' %(message)s'))
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(u'Mandos [%(process)d]: %(levelname)s:'
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u' %(message)s'))
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94
logger.addHandler(syslogger)
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95
80
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console = logging.StreamHandler()
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
' %(levelname)s: %(message)s'))
97
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
98
u' %(levelname)s:'
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u' %(message)s'))
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logger.addHandler(console)
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101
85
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class AvahiError(Exception):
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115
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class AvahiService(object):
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"""An Avahi (Zeroconf) service.
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Attributes:
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120
interface: integer; avahi.IF_UNSPEC or an interface index.
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Used to optionally bind to the specified interface.
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name: string; Example: 'Mandos'
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type: string; Example: '_mandos._tcp'.
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name: string; Example: u'Mandos'
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type: string; Example: u'_mandos._tcp'.
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See <http://www.dns-sd.org/ServiceTypes.html>
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port: integer; what port to announce
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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
"""
115
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def __init__(self, interface = avahi.IF_UNSPEC, name = None,
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137
servicetype = None, port = None, TXT = None,
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domain = "", host = "", max_renames = 32768):
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domain = u"", host = u"", max_renames = 32768,
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protocol = avahi.PROTO_UNSPEC, bus = None):
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self.interface = interface
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self.name = name
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self.type = servicetype
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146
self.host = host
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self.rename_count = 0
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148
self.max_renames = max_renames
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self.protocol = protocol
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self.group = None # our entry group
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self.server = None
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self.bus = bus
127
153
def rename(self):
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154
"""Derived from the Avahi example code"""
129
155
if self.rename_count >= self.max_renames:
131
157
u" after %i retries, exiting.",
132
158
self.rename_count)
133
159
raise AvahiServiceError(u"Too many renames")
134
self.name = server.GetAlternativeServiceName(self.name)
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self.name = unicode(self.server.GetAlternativeServiceName(self.name))
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161
logger.info(u"Changing Zeroconf service name to %r ...",
136
str(self.name))
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self.name)
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syslogger.setFormatter(logging.Formatter
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('Mandos (%s): %%(levelname)s:'
139
' %%(message)s' % self.name))
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(u'Mandos (%s) [%%(process)d]:'
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u' %%(levelname)s: %%(message)s'
166
% self.name))
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self.remove()
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self.add()
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try:
169
self.add()
170
except dbus.exceptions.DBusException, error:
171
logger.critical(u"DBusException: %s", error)
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self.cleanup()
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os._exit(1)
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174
self.rename_count += 1
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175
def remove(self):
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"""Derived from the Avahi example code"""
145
if group is not None:
146
group.Reset()
177
if self.group is not None:
178
self.group.Reset()
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def add(self):
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"""Derived from the Avahi example code"""
149
global group
150
if group is None:
151
group = dbus.Interface(bus.get_object
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(avahi.DBUS_NAME,
153
server.EntryGroupNew()),
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avahi.DBUS_INTERFACE_ENTRY_GROUP)
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group.connect_to_signal('StateChanged',
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entry_group_state_changed)
181
if self.group is None:
182
self.group = dbus.Interface(
183
self.bus.get_object(avahi.DBUS_NAME,
184
self.server.EntryGroupNew()),
185
avahi.DBUS_INTERFACE_ENTRY_GROUP)
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self.group.connect_to_signal('StateChanged',
187
self
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.entry_group_state_changed)
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logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
158
service.name, service.type)
159
group.AddService(
160
self.interface, # interface
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avahi.PROTO_INET6, # protocol
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dbus.UInt32(0), # flags
163
self.name, self.type,
164
self.domain, self.host,
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dbus.UInt16(self.port),
166
avahi.string_array_to_txt_array(self.TXT))
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group.Commit()
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# From the Avahi example code:
170
group = None # our entry group
171
# End of Avahi example code
172
173
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def _datetime_to_dbus(dt, variant_level=0):
175
"""Convert a UTC datetime.datetime() to a D-Bus type."""
176
return dbus.String(dt.isoformat(), variant_level=variant_level)
177
178
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class Client(dbus.service.Object):
190
self.name, self.type)
191
self.group.AddService(
192
self.interface,
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self.protocol,
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dbus.UInt32(0), # flags
195
self.name, self.type,
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self.domain, self.host,
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dbus.UInt16(self.port),
198
avahi.string_array_to_txt_array(self.TXT))
199
self.group.Commit()
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def entry_group_state_changed(self, state, error):
201
"""Derived from the Avahi example code"""
202
logger.debug(u"Avahi entry group state change: %i", state)
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204
if state == avahi.ENTRY_GROUP_ESTABLISHED:
205
logger.debug(u"Zeroconf service established.")
206
elif state == avahi.ENTRY_GROUP_COLLISION:
207
logger.warning(u"Zeroconf service name collision.")
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self.rename()
209
elif state == avahi.ENTRY_GROUP_FAILURE:
210
logger.critical(u"Avahi: Error in group state changed %s",
211
unicode(error))
212
raise AvahiGroupError(u"State changed: %s"
213
% unicode(error))
214
def cleanup(self):
215
"""Derived from the Avahi example code"""
216
if self.group is not None:
217
self.group.Free()
218
self.group = None
219
def server_state_changed(self, state):
220
"""Derived from the Avahi example code"""
221
logger.debug(u"Avahi server state change: %i", state)
222
if state == avahi.SERVER_COLLISION:
223
logger.error(u"Zeroconf server name collision")
224
self.remove()
225
elif state == avahi.SERVER_RUNNING:
226
self.add()
227
def activate(self):
228
"""Derived from the Avahi example code"""
229
if self.server is None:
230
self.server = dbus.Interface(
231
self.bus.get_object(avahi.DBUS_NAME,
232
avahi.DBUS_PATH_SERVER),
233
avahi.DBUS_INTERFACE_SERVER)
234
self.server.connect_to_signal(u"StateChanged",
235
self.server_state_changed)
236
self.server_state_changed(self.server.GetState())
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238
239
class Client(object):
180
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"""A representation of a client host served by this server.
241
181
242
Attributes:
182
name: string; from the config file, used in log messages and
183
D-Bus identifiers
243
_approved: bool(); 'None' if not yet approved/disapproved
244
approval_delay: datetime.timedelta(); Time to wait for approval
245
approval_duration: datetime.timedelta(); Duration of one approval
246
checker: subprocess.Popen(); a running checker process used
247
to see if the client lives.
248
'None' if no process is running.
249
checker_callback_tag: a gobject event source tag, or None
250
checker_command: string; External command which is run to check
251
if client lives. %() expansions are done at
252
runtime with vars(self) as dict, so that for
253
instance %(name)s can be used in the command.
254
checker_initiator_tag: a gobject event source tag, or None
255
created: datetime.datetime(); (UTC) object creation
256
current_checker_command: string; current running checker_command
257
disable_hook: If set, called by disable() as disable_hook(self)
258
disable_initiator_tag: a gobject event source tag, or None
259
enabled: bool()
184
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fingerprint: string (40 or 32 hexadecimal digits); used to
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uniquely identify the client
186
secret: bytestring; sent verbatim (over TLS) to client
187
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host: string; available for use by the checker command
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created: datetime.datetime(); (UTC) object creation
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interval: datetime.timedelta(); How often to start a new checker
264
last_approval_request: datetime.datetime(); (UTC) or None
265
last_checked_ok: datetime.datetime(); (UTC) or None
189
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last_enabled: datetime.datetime(); (UTC)
190
enabled: bool()
191
last_checked_ok: datetime.datetime(); (UTC) or None
267
name: string; from the config file, used in log messages and
268
D-Bus identifiers
269
secret: bytestring; sent verbatim (over TLS) to client
192
270
timeout: datetime.timedelta(); How long from last_checked_ok
193
until this client is invalid
194
interval: datetime.timedelta(); How often to start a new checker
195
disable_hook: If set, called by disable() as disable_hook(self)
196
checker: subprocess.Popen(); a running checker process used
197
to see if the client lives.
198
'None' if no process is running.
199
checker_initiator_tag: a gobject event source tag, or None
200
disable_initiator_tag: - '' -
201
checker_callback_tag: - '' -
202
checker_command: string; External command which is run to check if
203
client lives. %() expansions are done at
204
runtime with vars(self) as dict, so that for
205
instance %(name)s can be used in the command.
206
use_dbus: bool(); Whether to provide D-Bus interface and signals
207
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
271
until this client is disabled
272
runtime_expansions: Allowed attributes for runtime expansion.
208
273
"""
274
275
runtime_expansions = (u"approval_delay", u"approval_duration",
276
u"created", u"enabled", u"fingerprint",
277
u"host", u"interval", u"last_checked_ok",
278
u"last_enabled", u"name", u"timeout")
279
280
@staticmethod
281
def _timedelta_to_milliseconds(td):
282
"Convert a datetime.timedelta() to milliseconds"
283
return ((td.days * 24 * 60 * 60 * 1000)
284
+ (td.seconds * 1000)
285
+ (td.microseconds // 1000))
286
209
287
def timeout_milliseconds(self):
210
288
"Return the 'timeout' attribute in milliseconds"
211
return ((self.timeout.days * 24 * 60 * 60 * 1000)
212
+ (self.timeout.seconds * 1000)
213
+ (self.timeout.microseconds // 1000))
289
return self._timedelta_to_milliseconds(self.timeout)
214
290
215
291
def interval_milliseconds(self):
216
292
"Return the 'interval' attribute in milliseconds"
217
return ((self.interval.days * 24 * 60 * 60 * 1000)
218
+ (self.interval.seconds * 1000)
219
+ (self.interval.microseconds // 1000))
293
return self._timedelta_to_milliseconds(self.interval)
294
295
def approval_delay_milliseconds(self):
296
return self._timedelta_to_milliseconds(self.approval_delay)
220
297
221
def __init__(self, name = None, disable_hook=None, config=None,
222
use_dbus=True):
298
def __init__(self, name = None, disable_hook=None, config=None):
223
299
"""Note: the 'checker' key in 'config' sets the
224
300
'checker_command' attribute and *not* the 'checker'
225
301
attribute."""
227
303
if config is None:
228
304
config = {}
229
305
logger.debug(u"Creating client %r", self.name)
230
self.use_dbus = False # During __init__
231
306
# Uppercase and remove spaces from fingerprint for later
232
307
# comparison purposes with return value from the fingerprint()
233
308
# function
234
self.fingerprint = (config["fingerprint"].upper()
309
self.fingerprint = (config[u"fingerprint"].upper()
235
310
.replace(u" ", u""))
236
311
logger.debug(u" Fingerprint: %s", self.fingerprint)
237
if "secret" in config:
238
self.secret = config["secret"].decode(u"base64")
239
elif "secfile" in config:
240
with closing(open(os.path.expanduser
241
(os.path.expandvars
242
(config["secfile"])))) as secfile:
312
if u"secret" in config:
313
self.secret = config[u"secret"].decode(u"base64")
314
elif u"secfile" in config:
315
with open(os.path.expanduser(os.path.expandvars
316
(config[u"secfile"])),
317
"rb") as secfile:
243
318
self.secret = secfile.read()
244
319
else:
245
320
raise TypeError(u"No secret or secfile for client %s"
246
321
% self.name)
247
self.host = config.get("host", "")
322
self.host = config.get(u"host", u"")
248
323
self.created = datetime.datetime.utcnow()
249
324
self.enabled = False
325
self.last_approval_request = None
250
326
self.last_enabled = None
251
327
self.last_checked_ok = None
252
self.timeout = string_to_delta(config["timeout"])
253
self.interval = string_to_delta(config["interval"])
328
self.timeout = string_to_delta(config[u"timeout"])
329
self.interval = string_to_delta(config[u"interval"])
254
330
self.disable_hook = disable_hook
255
331
self.checker = None
256
332
self.checker_initiator_tag = None
257
333
self.disable_initiator_tag = None
258
334
self.checker_callback_tag = None
259
self.checker_command = config["checker"]
335
self.checker_command = config[u"checker"]
336
self.current_checker_command = None
260
337
self.last_connect = None
261
# Only now, when this client is initialized, can it show up on
262
# the D-Bus
263
self.use_dbus = use_dbus
264
if self.use_dbus:
265
self.dbus_object_path = (dbus.ObjectPath
266
("/clients/"
267
+ self.name.replace(".", "_")))
268
dbus.service.Object.__init__(self, bus,
269
self.dbus_object_path)
338
self._approved = None
339
self.approved_by_default = config.get(u"approved_by_default",
340
True)
341
self.approvals_pending = 0
342
self.approval_delay = string_to_delta(
343
config[u"approval_delay"])
344
self.approval_duration = string_to_delta(
345
config[u"approval_duration"])
346
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
270
347
348
def send_changedstate(self):
349
self.changedstate.acquire()
350
self.changedstate.notify_all()
351
self.changedstate.release()
352
271
353
def enable(self):
272
354
"""Start this client's checker and timeout hooks"""
355
if getattr(self, u"enabled", False):
356
# Already enabled
357
return
358
self.send_changedstate()
273
359
self.last_enabled = datetime.datetime.utcnow()
274
360
# Schedule a new checker to be started an 'interval' from now,
275
361
# and every interval from then on.
276
362
self.checker_initiator_tag = (gobject.timeout_add
277
363
(self.interval_milliseconds(),
278
364
self.start_checker))
279
# Also start a new checker *right now*.
280
self.start_checker()
281
365
# Schedule a disable() when 'timeout' has passed
282
366
self.disable_initiator_tag = (gobject.timeout_add
283
367
(self.timeout_milliseconds(),
284
368
self.disable))
285
369
self.enabled = True
286
if self.use_dbus:
287
# Emit D-Bus signals
288
self.PropertyChanged(dbus.String(u"enabled"),
289
dbus.Boolean(True, variant_level=1))
290
self.PropertyChanged(dbus.String(u"last_enabled"),
291
(_datetime_to_dbus(self.last_enabled,
292
variant_level=1)))
370
# Also start a new checker *right now*.
371
self.start_checker()
293
372
294
def disable(self):
373
def disable(self, quiet=True):
295
374
"""Disable this client."""
296
375
if not getattr(self, "enabled", False):
297
376
return False
298
logger.info(u"Disabling client %s", self.name)
299
if getattr(self, "disable_initiator_tag", False):
377
if not quiet:
378
self.send_changedstate()
379
if not quiet:
380
logger.info(u"Disabling client %s", self.name)
381
if getattr(self, u"disable_initiator_tag", False):
300
382
gobject.source_remove(self.disable_initiator_tag)
301
383
self.disable_initiator_tag = None
302
if getattr(self, "checker_initiator_tag", False):
384
if getattr(self, u"checker_initiator_tag", False):
303
385
gobject.source_remove(self.checker_initiator_tag)
304
386
self.checker_initiator_tag = None
305
387
self.stop_checker()
306
388
if self.disable_hook:
307
389
self.disable_hook(self)
308
390
self.enabled = False
309
if self.use_dbus:
310
# Emit D-Bus signal
311
self.PropertyChanged(dbus.String(u"enabled"),
312
dbus.Boolean(False, variant_level=1))
313
391
# Do not run this again if called by a gobject.timeout_add
314
392
return False
315
393
321
399
"""The checker has completed, so take appropriate actions."""
322
400
self.checker_callback_tag = None
323
401
self.checker = None
324
if self.use_dbus:
325
# Emit D-Bus signal
326
self.PropertyChanged(dbus.String(u"checker_running"),
327
dbus.Boolean(False, variant_level=1))
328
402
if os.WIFEXITED(condition):
329
403
exitstatus = os.WEXITSTATUS(condition)
330
404
if exitstatus == 0:
334
408
else:
335
409
logger.info(u"Checker for %(name)s failed",
336
410
vars(self))
337
if self.use_dbus:
338
# Emit D-Bus signal
339
self.CheckerCompleted(dbus.Int16(exitstatus),
340
dbus.Int64(condition),
341
dbus.String(command))
342
411
else:
343
412
logger.warning(u"Checker for %(name)s crashed?",
344
413
vars(self))
345
if self.use_dbus:
346
# Emit D-Bus signal
347
self.CheckerCompleted(dbus.Int16(-1),
348
dbus.Int64(condition),
349
dbus.String(command))
350
414
351
415
def checked_ok(self):
352
416
"""Bump up the timeout for this client.
417
353
418
This should only be called when the client has been seen,
354
419
alive and well.
355
420
"""
358
423
self.disable_initiator_tag = (gobject.timeout_add
359
424
(self.timeout_milliseconds(),
360
425
self.disable))
361
if self.use_dbus:
362
# Emit D-Bus signal
363
self.PropertyChanged(
364
dbus.String(u"last_checked_ok"),
365
(_datetime_to_dbus(self.last_checked_ok,
366
variant_level=1)))
426
427
def need_approval(self):
428
self.last_approval_request = datetime.datetime.utcnow()
367
429
368
430
def start_checker(self):
369
431
"""Start a new checker subprocess if one is not running.
432
370
433
If a checker already exists, leave it running and do
371
434
nothing."""
372
435
# The reason for not killing a running checker is that if we
375
438
# client would inevitably timeout, since no checker would get
376
439
# a chance to run to completion. If we instead leave running
377
440
# checkers alone, the checker would have to take more time
378
# than 'timeout' for the client to be declared invalid, which
379
# is as it should be.
441
# than 'timeout' for the client to be disabled, which is as it
442
# should be.
443
444
# If a checker exists, make sure it is not a zombie
445
try:
446
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
447
except (AttributeError, OSError), error:
448
if (isinstance(error, OSError)
449
and error.errno != errno.ECHILD):
450
raise error
451
else:
452
if pid:
453
logger.warning(u"Checker was a zombie")
454
gobject.source_remove(self.checker_callback_tag)
455
self.checker_callback(pid, status,
456
self.current_checker_command)
457
# Start a new checker if needed
380
458
if self.checker is None:
381
459
try:
382
460
# In case checker_command has exactly one % operator
383
461
command = self.checker_command % self.host
384
462
except TypeError:
385
463
# Escape attributes for the shell
386
escaped_attrs = dict((key, re.escape(str(val)))
387
for key, val in
388
vars(self).iteritems())
464
escaped_attrs = dict(
465
(attr,
466
re.escape(unicode(str(getattr(self, attr, u"")),
467
errors=
468
u'replace')))
469
for attr in
470
self.runtime_expansions)
471
389
472
try:
390
473
command = self.checker_command % escaped_attrs
391
474
except TypeError, error:
392
475
logger.error(u'Could not format string "%s":'
393
476
u' %s', self.checker_command, error)
394
477
return True # Try again later
478
self.current_checker_command = command
395
479
try:
396
480
logger.info(u"Starting checker %r for %s",
397
481
command, self.name)
401
485
# always replaced by /dev/null.)
402
486
self.checker = subprocess.Popen(command,
403
487
close_fds=True,
404
shell=True, cwd="/")
405
if self.use_dbus:
406
# Emit D-Bus signal
407
self.CheckerStarted(command)
408
self.PropertyChanged(
409
dbus.String("checker_running"),
410
dbus.Boolean(True, variant_level=1))
488
shell=True, cwd=u"/")
411
489
self.checker_callback_tag = (gobject.child_watch_add
412
490
(self.checker.pid,
413
491
self.checker_callback,
429
507
if self.checker_callback_tag:
430
508
gobject.source_remove(self.checker_callback_tag)
431
509
self.checker_callback_tag = None
432
if getattr(self, "checker", None) is None:
510
if getattr(self, u"checker", None) is None:
433
511
return
434
512
logger.debug(u"Stopping checker for %(name)s", vars(self))
435
513
try:
436
514
os.kill(self.checker.pid, signal.SIGTERM)
437
#os.sleep(0.5)
515
#time.sleep(0.5)
438
516
#if self.checker.poll() is None:
439
517
# os.kill(self.checker.pid, signal.SIGKILL)
440
518
except OSError, error:
441
519
if error.errno != errno.ESRCH: # No such process
442
520
raise
443
521
self.checker = None
444
if self.use_dbus:
445
self.PropertyChanged(dbus.String(u"checker_running"),
446
dbus.Boolean(False, variant_level=1))
447
448
def still_valid(self):
449
"""Has the timeout not yet passed for this client?"""
450
if not getattr(self, "enabled", False):
451
return False
452
now = datetime.datetime.utcnow()
453
if self.last_checked_ok is None:
454
return now < (self.created + self.timeout)
455
else:
456
return now < (self.last_checked_ok + self.timeout)
457
458
## D-Bus methods & signals
522
523
def dbus_service_property(dbus_interface, signature=u"v",
524
access=u"readwrite", byte_arrays=False):
525
"""Decorators for marking methods of a DBusObjectWithProperties to
526
become properties on the D-Bus.
527
528
The decorated method will be called with no arguments by "Get"
529
and with one argument by "Set".
530
531
The parameters, where they are supported, are the same as
532
dbus.service.method, except there is only "signature", since the
533
type from Get() and the type sent to Set() is the same.
534
"""
535
# Encoding deeply encoded byte arrays is not supported yet by the
536
# "Set" method, so we fail early here:
537
if byte_arrays and signature != u"ay":
538
raise ValueError(u"Byte arrays not supported for non-'ay'"
539
u" signature %r" % signature)
540
def decorator(func):
541
func._dbus_is_property = True
542
func._dbus_interface = dbus_interface
543
func._dbus_signature = signature
544
func._dbus_access = access
545
func._dbus_name = func.__name__
546
if func._dbus_name.endswith(u"_dbus_property"):
547
func._dbus_name = func._dbus_name[:-14]
548
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
549
return func
550
return decorator
551
552
553
class DBusPropertyException(dbus.exceptions.DBusException):
554
"""A base class for D-Bus property-related exceptions
555
"""
556
def __unicode__(self):
557
return unicode(str(self))
558
559
560
class DBusPropertyAccessException(DBusPropertyException):
561
"""A property's access permissions disallows an operation.
562
"""
563
pass
564
565
566
class DBusPropertyNotFound(DBusPropertyException):
567
"""An attempt was made to access a non-existing property.
568
"""
569
pass
570
571
572
class DBusObjectWithProperties(dbus.service.Object):
573
"""A D-Bus object with properties.
574
575
Classes inheriting from this can use the dbus_service_property
576
decorator to expose methods as D-Bus properties. It exposes the
577
standard Get(), Set(), and GetAll() methods on the D-Bus.
578
"""
579
580
@staticmethod
581
def _is_dbus_property(obj):
582
return getattr(obj, u"_dbus_is_property", False)
583
584
def _get_all_dbus_properties(self):
585
"""Returns a generator of (name, attribute) pairs
586
"""
587
return ((prop._dbus_name, prop)
588
for name, prop in
589
inspect.getmembers(self, self._is_dbus_property))
590
591
def _get_dbus_property(self, interface_name, property_name):
592
"""Returns a bound method if one exists which is a D-Bus
593
property with the specified name and interface.
594
"""
595
for name in (property_name,
596
property_name + u"_dbus_property"):
597
prop = getattr(self, name, None)
598
if (prop is None
599
or not self._is_dbus_property(prop)
600
or prop._dbus_name != property_name
601
or (interface_name and prop._dbus_interface
602
and interface_name != prop._dbus_interface)):
603
continue
604
return prop
605
# No such property
606
raise DBusPropertyNotFound(self.dbus_object_path + u":"
607
+ interface_name + u"."
608
+ property_name)
609
610
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
611
out_signature=u"v")
612
def Get(self, interface_name, property_name):
613
"""Standard D-Bus property Get() method, see D-Bus standard.
614
"""
615
prop = self._get_dbus_property(interface_name, property_name)
616
if prop._dbus_access == u"write":
617
raise DBusPropertyAccessException(property_name)
618
value = prop()
619
if not hasattr(value, u"variant_level"):
620
return value
621
return type(value)(value, variant_level=value.variant_level+1)
622
623
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
624
def Set(self, interface_name, property_name, value):
625
"""Standard D-Bus property Set() method, see D-Bus standard.
626
"""
627
prop = self._get_dbus_property(interface_name, property_name)
628
if prop._dbus_access == u"read":
629
raise DBusPropertyAccessException(property_name)
630
if prop._dbus_get_args_options[u"byte_arrays"]:
631
# The byte_arrays option is not supported yet on
632
# signatures other than "ay".
633
if prop._dbus_signature != u"ay":
634
raise ValueError
635
value = dbus.ByteArray(''.join(unichr(byte)
636
for byte in value))
637
prop(value)
638
639
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
640
out_signature=u"a{sv}")
641
def GetAll(self, interface_name):
642
"""Standard D-Bus property GetAll() method, see D-Bus
643
standard.
644
645
Note: Will not include properties with access="write".
646
"""
647
all = {}
648
for name, prop in self._get_all_dbus_properties():
649
if (interface_name
650
and interface_name != prop._dbus_interface):
651
# Interface non-empty but did not match
652
continue
653
# Ignore write-only properties
654
if prop._dbus_access == u"write":
655
continue
656
value = prop()
657
if not hasattr(value, u"variant_level"):
658
all[name] = value
659
continue
660
all[name] = type(value)(value, variant_level=
661
value.variant_level+1)
662
return dbus.Dictionary(all, signature=u"sv")
663
664
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
665
out_signature=u"s",
666
path_keyword='object_path',
667
connection_keyword='connection')
668
def Introspect(self, object_path, connection):
669
"""Standard D-Bus method, overloaded to insert property tags.
670
"""
671
xmlstring = dbus.service.Object.Introspect(self, object_path,
672
connection)
673
try:
674
document = xml.dom.minidom.parseString(xmlstring)
675
def make_tag(document, name, prop):
676
e = document.createElement(u"property")
677
e.setAttribute(u"name", name)
678
e.setAttribute(u"type", prop._dbus_signature)
679
e.setAttribute(u"access", prop._dbus_access)
680
return e
681
for if_tag in document.getElementsByTagName(u"interface"):
682
for tag in (make_tag(document, name, prop)
683
for name, prop
684
in self._get_all_dbus_properties()
685
if prop._dbus_interface
686
== if_tag.getAttribute(u"name")):
687
if_tag.appendChild(tag)
688
# Add the names to the return values for the
689
# "org.freedesktop.DBus.Properties" methods
690
if (if_tag.getAttribute(u"name")
691
== u"org.freedesktop.DBus.Properties"):
692
for cn in if_tag.getElementsByTagName(u"method"):
693
if cn.getAttribute(u"name") == u"Get":
694
for arg in cn.getElementsByTagName(u"arg"):
695
if (arg.getAttribute(u"direction")
696
== u"out"):
697
arg.setAttribute(u"name", u"value")
698
elif cn.getAttribute(u"name") == u"GetAll":
699
for arg in cn.getElementsByTagName(u"arg"):
700
if (arg.getAttribute(u"direction")
701
== u"out"):
702
arg.setAttribute(u"name", u"props")
703
xmlstring = document.toxml(u"utf-8")
704
document.unlink()
705
except (AttributeError, xml.dom.DOMException,
706
xml.parsers.expat.ExpatError), error:
707
logger.error(u"Failed to override Introspection method",
708
error)
709
return xmlstring
710
711
712
class ClientDBus(Client, DBusObjectWithProperties):
713
"""A Client class using D-Bus
714
715
Attributes:
716
dbus_object_path: dbus.ObjectPath
717
bus: dbus.SystemBus()
718
"""
719
720
runtime_expansions = (Client.runtime_expansions
721
+ (u"dbus_object_path",))
722
723
# dbus.service.Object doesn't use super(), so we can't either.
724
725
def __init__(self, bus = None, *args, **kwargs):
726
self._approvals_pending = 0
727
self.bus = bus
728
Client.__init__(self, *args, **kwargs)
729
# Only now, when this client is initialized, can it show up on
730
# the D-Bus
731
client_object_name = unicode(self.name).translate(
732
{ord(u"."): ord(u"_"),
733
ord(u"-"): ord(u"_")})
734
self.dbus_object_path = (dbus.ObjectPath
735
(u"/clients/" + client_object_name))
736
DBusObjectWithProperties.__init__(self, self.bus,
737
self.dbus_object_path)
738
739
def _get_approvals_pending(self):
740
return self._approvals_pending
741
def _set_approvals_pending(self, value):
742
old_value = self._approvals_pending
743
self._approvals_pending = value
744
bval = bool(value)
745
if (hasattr(self, "dbus_object_path")
746
and bval is not bool(old_value)):
747
dbus_bool = dbus.Boolean(bval, variant_level=1)
748
self.PropertyChanged(dbus.String(u"ApprovalPending"),
749
dbus_bool)
750
751
approvals_pending = property(_get_approvals_pending,
752
_set_approvals_pending)
753
del _get_approvals_pending, _set_approvals_pending
754
755
@staticmethod
756
def _datetime_to_dbus(dt, variant_level=0):
757
"""Convert a UTC datetime.datetime() to a D-Bus type."""
758
return dbus.String(dt.isoformat(),
759
variant_level=variant_level)
760
761
def enable(self):
762
oldstate = getattr(self, u"enabled", False)
763
r = Client.enable(self)
764
if oldstate != self.enabled:
765
# Emit D-Bus signals
766
self.PropertyChanged(dbus.String(u"Enabled"),
767
dbus.Boolean(True, variant_level=1))
768
self.PropertyChanged(
769
dbus.String(u"LastEnabled"),
770
self._datetime_to_dbus(self.last_enabled,
771
variant_level=1))
772
return r
773
774
def disable(self, quiet = False):
775
oldstate = getattr(self, u"enabled", False)
776
r = Client.disable(self, quiet=quiet)
777
if not quiet and oldstate != self.enabled:
778
# Emit D-Bus signal
779
self.PropertyChanged(dbus.String(u"Enabled"),
780
dbus.Boolean(False, variant_level=1))
781
return r
782
783
def __del__(self, *args, **kwargs):
784
try:
785
self.remove_from_connection()
786
except LookupError:
787
pass
788
if hasattr(DBusObjectWithProperties, u"__del__"):
789
DBusObjectWithProperties.__del__(self, *args, **kwargs)
790
Client.__del__(self, *args, **kwargs)
791
792
def checker_callback(self, pid, condition, command,
793
*args, **kwargs):
794
self.checker_callback_tag = None
795
self.checker = None
796
# Emit D-Bus signal
797
self.PropertyChanged(dbus.String(u"CheckerRunning"),
798
dbus.Boolean(False, variant_level=1))
799
if os.WIFEXITED(condition):
800
exitstatus = os.WEXITSTATUS(condition)
801
# Emit D-Bus signal
802
self.CheckerCompleted(dbus.Int16(exitstatus),
803
dbus.Int64(condition),
804
dbus.String(command))
805
else:
806
# Emit D-Bus signal
807
self.CheckerCompleted(dbus.Int16(-1),
808
dbus.Int64(condition),
809
dbus.String(command))
810
811
return Client.checker_callback(self, pid, condition, command,
812
*args, **kwargs)
813
814
def checked_ok(self, *args, **kwargs):
815
r = Client.checked_ok(self, *args, **kwargs)
816
# Emit D-Bus signal
817
self.PropertyChanged(
818
dbus.String(u"LastCheckedOK"),
819
(self._datetime_to_dbus(self.last_checked_ok,
820
variant_level=1)))
821
return r
822
823
def need_approval(self, *args, **kwargs):
824
r = Client.need_approval(self, *args, **kwargs)
825
# Emit D-Bus signal
826
self.PropertyChanged(
827
dbus.String(u"LastApprovalRequest"),
828
(self._datetime_to_dbus(self.last_approval_request,
829
variant_level=1)))
830
return r
831
832
def start_checker(self, *args, **kwargs):
833
old_checker = self.checker
834
if self.checker is not None:
835
old_checker_pid = self.checker.pid
836
else:
837
old_checker_pid = None
838
r = Client.start_checker(self, *args, **kwargs)
839
# Only if new checker process was started
840
if (self.checker is not None
841
and old_checker_pid != self.checker.pid):
842
# Emit D-Bus signal
843
self.CheckerStarted(self.current_checker_command)
844
self.PropertyChanged(
845
dbus.String(u"CheckerRunning"),
846
dbus.Boolean(True, variant_level=1))
847
return r
848
849
def stop_checker(self, *args, **kwargs):
850
old_checker = getattr(self, u"checker", None)
851
r = Client.stop_checker(self, *args, **kwargs)
852
if (old_checker is not None
853
and getattr(self, u"checker", None) is None):
854
self.PropertyChanged(dbus.String(u"CheckerRunning"),
855
dbus.Boolean(False, variant_level=1))
856
return r
857
858
def _reset_approved(self):
859
self._approved = None
860
return False
861
862
def approve(self, value=True):
863
self.send_changedstate()
864
self._approved = value
865
gobject.timeout_add(self._timedelta_to_milliseconds
866
(self.approval_duration),
867
self._reset_approved)
868
869
870
## D-Bus methods, signals & properties
459
871
_interface = u"se.bsnet.fukt.Mandos.Client"
460
872
461
# CheckedOK - method
462
CheckedOK = dbus.service.method(_interface)(checked_ok)
463
CheckedOK.__name__ = "CheckedOK"
873
## Signals
464
874
465
875
# CheckerCompleted - signal
466
@dbus.service.signal(_interface, signature="nxs")
876
@dbus.service.signal(_interface, signature=u"nxs")
467
877
def CheckerCompleted(self, exitcode, waitstatus, command):
468
878
"D-Bus signal"
469
879
pass
470
880
471
881
# CheckerStarted - signal
472
@dbus.service.signal(_interface, signature="s")
882
@dbus.service.signal(_interface, signature=u"s")
473
883
def CheckerStarted(self, command):
474
884
"D-Bus signal"
475
885
pass
476
886
477
# GetAllProperties - method
478
@dbus.service.method(_interface, out_signature="a{sv}")
479
def GetAllProperties(self):
480
"D-Bus method"
481
return dbus.Dictionary({
482
dbus.String("name"):
483
dbus.String(self.name, variant_level=1),
484
dbus.String("fingerprint"):
485
dbus.String(self.fingerprint, variant_level=1),
486
dbus.String("host"):
487
dbus.String(self.host, variant_level=1),
488
dbus.String("created"):
489
_datetime_to_dbus(self.created, variant_level=1),
490
dbus.String("last_enabled"):
491
(_datetime_to_dbus(self.last_enabled,
492
variant_level=1)
493
if self.last_enabled is not None
494
else dbus.Boolean(False, variant_level=1)),
495
dbus.String("enabled"):
496
dbus.Boolean(self.enabled, variant_level=1),
497
dbus.String("last_checked_ok"):
498
(_datetime_to_dbus(self.last_checked_ok,
499
variant_level=1)
500
if self.last_checked_ok is not None
501
else dbus.Boolean (False, variant_level=1)),
502
dbus.String("timeout"):
503
dbus.UInt64(self.timeout_milliseconds(),
504
variant_level=1),
505
dbus.String("interval"):
506
dbus.UInt64(self.interval_milliseconds(),
507
variant_level=1),
508
dbus.String("checker"):
509
dbus.String(self.checker_command,
510
variant_level=1),
511
dbus.String("checker_running"):
512
dbus.Boolean(self.checker is not None,
513
variant_level=1),
514
dbus.String("object_path"):
515
dbus.ObjectPath(self.dbus_object_path,
516
variant_level=1)
517
}, signature="sv")
518
519
# IsStillValid - method
520
IsStillValid = (dbus.service.method(_interface, out_signature="b")
521
(still_valid))
522
IsStillValid.__name__ = "IsStillValid"
523
524
887
# PropertyChanged - signal
525
@dbus.service.signal(_interface, signature="sv")
888
@dbus.service.signal(_interface, signature=u"sv")
526
889
def PropertyChanged(self, property, value):
527
890
"D-Bus signal"
528
891
pass
529
892
530
# SetChecker - method
531
@dbus.service.method(_interface, in_signature="s")
532
def SetChecker(self, checker):
533
"D-Bus setter method"
534
self.checker_command = checker
535
# Emit D-Bus signal
536
self.PropertyChanged(dbus.String(u"checker"),
537
dbus.String(self.checker_command,
538
variant_level=1))
539
540
# SetHost - method
541
@dbus.service.method(_interface, in_signature="s")
542
def SetHost(self, host):
543
"D-Bus setter method"
544
self.host = host
545
# Emit D-Bus signal
546
self.PropertyChanged(dbus.String(u"host"),
547
dbus.String(self.host, variant_level=1))
548
549
# SetInterval - method
550
@dbus.service.method(_interface, in_signature="t")
551
def SetInterval(self, milliseconds):
552
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
553
# Emit D-Bus signal
554
self.PropertyChanged(dbus.String(u"interval"),
555
(dbus.UInt64(self.interval_milliseconds(),
556
variant_level=1)))
557
558
# SetSecret - method
559
@dbus.service.method(_interface, in_signature="ay",
560
byte_arrays=True)
561
def SetSecret(self, secret):
562
"D-Bus setter method"
563
self.secret = str(secret)
564
565
# SetTimeout - method
566
@dbus.service.method(_interface, in_signature="t")
567
def SetTimeout(self, milliseconds):
568
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
569
# Emit D-Bus signal
570
self.PropertyChanged(dbus.String(u"timeout"),
571
(dbus.UInt64(self.timeout_milliseconds(),
572
variant_level=1)))
893
# GotSecret - signal
894
@dbus.service.signal(_interface)
895
def GotSecret(self):
896
"""D-Bus signal
897
Is sent after a successful transfer of secret from the Mandos
898
server to mandos-client
899
"""
900
pass
901
902
# Rejected - signal
903
@dbus.service.signal(_interface, signature=u"s")
904
def Rejected(self, reason):
905
"D-Bus signal"
906
pass
907
908
# NeedApproval - signal
909
@dbus.service.signal(_interface, signature=u"tb")
910
def NeedApproval(self, timeout, default):
911
"D-Bus signal"
912
return self.need_approval()
913
914
## Methods
915
916
# Approve - method
917
@dbus.service.method(_interface, in_signature=u"b")
918
def Approve(self, value):
919
self.approve(value)
920
921
# CheckedOK - method
922
@dbus.service.method(_interface)
923
def CheckedOK(self):
924
return self.checked_ok()
573
925
574
926
# Enable - method
575
Enable = dbus.service.method(_interface)(enable)
576
Enable.__name__ = "Enable"
927
@dbus.service.method(_interface)
928
def Enable(self):
929
"D-Bus method"
930
self.enable()
577
931
578
932
# StartChecker - method
579
933
@dbus.service.method(_interface)
588
942
self.disable()
589
943
590
944
# StopChecker - method
591
StopChecker = dbus.service.method(_interface)(stop_checker)
592
StopChecker.__name__ = "StopChecker"
945
@dbus.service.method(_interface)
946
def StopChecker(self):
947
self.stop_checker()
948
949
## Properties
950
951
# ApprovalPending - property
952
@dbus_service_property(_interface, signature=u"b", access=u"read")
953
def ApprovalPending_dbus_property(self):
954
return dbus.Boolean(bool(self.approvals_pending))
955
956
# ApprovedByDefault - property
957
@dbus_service_property(_interface, signature=u"b",
958
access=u"readwrite")
959
def ApprovedByDefault_dbus_property(self, value=None):
960
if value is None: # get
961
return dbus.Boolean(self.approved_by_default)
962
self.approved_by_default = bool(value)
963
# Emit D-Bus signal
964
self.PropertyChanged(dbus.String(u"ApprovedByDefault"),
965
dbus.Boolean(value, variant_level=1))
966
967
# ApprovalDelay - property
968
@dbus_service_property(_interface, signature=u"t",
969
access=u"readwrite")
970
def ApprovalDelay_dbus_property(self, value=None):
971
if value is None: # get
972
return dbus.UInt64(self.approval_delay_milliseconds())
973
self.approval_delay = datetime.timedelta(0, 0, 0, value)
974
# Emit D-Bus signal
975
self.PropertyChanged(dbus.String(u"ApprovalDelay"),
976
dbus.UInt64(value, variant_level=1))
977
978
# ApprovalDuration - property
979
@dbus_service_property(_interface, signature=u"t",
980
access=u"readwrite")
981
def ApprovalDuration_dbus_property(self, value=None):
982
if value is None: # get
983
return dbus.UInt64(self._timedelta_to_milliseconds(
984
self.approval_duration))
985
self.approval_duration = datetime.timedelta(0, 0, 0, value)
986
# Emit D-Bus signal
987
self.PropertyChanged(dbus.String(u"ApprovalDuration"),
988
dbus.UInt64(value, variant_level=1))
989
990
# Name - property
991
@dbus_service_property(_interface, signature=u"s", access=u"read")
992
def Name_dbus_property(self):
993
return dbus.String(self.name)
994
995
# Fingerprint - property
996
@dbus_service_property(_interface, signature=u"s", access=u"read")
997
def Fingerprint_dbus_property(self):
998
return dbus.String(self.fingerprint)
999
1000
# Host - property
1001
@dbus_service_property(_interface, signature=u"s",
1002
access=u"readwrite")
1003
def Host_dbus_property(self, value=None):
1004
if value is None: # get
1005
return dbus.String(self.host)
1006
self.host = value
1007
# Emit D-Bus signal
1008
self.PropertyChanged(dbus.String(u"Host"),
1009
dbus.String(value, variant_level=1))
1010
1011
# Created - property
1012
@dbus_service_property(_interface, signature=u"s", access=u"read")
1013
def Created_dbus_property(self):
1014
return dbus.String(self._datetime_to_dbus(self.created))
1015
1016
# LastEnabled - property
1017
@dbus_service_property(_interface, signature=u"s", access=u"read")
1018
def LastEnabled_dbus_property(self):
1019
if self.last_enabled is None:
1020
return dbus.String(u"")
1021
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1022
1023
# Enabled - property
1024
@dbus_service_property(_interface, signature=u"b",
1025
access=u"readwrite")
1026
def Enabled_dbus_property(self, value=None):
1027
if value is None: # get
1028
return dbus.Boolean(self.enabled)
1029
if value:
1030
self.enable()
1031
else:
1032
self.disable()
1033
1034
# LastCheckedOK - property
1035
@dbus_service_property(_interface, signature=u"s",
1036
access=u"readwrite")
1037
def LastCheckedOK_dbus_property(self, value=None):
1038
if value is not None:
1039
self.checked_ok()
1040
return
1041
if self.last_checked_ok is None:
1042
return dbus.String(u"")
1043
return dbus.String(self._datetime_to_dbus(self
1044
.last_checked_ok))
1045
1046
# LastApprovalRequest - property
1047
@dbus_service_property(_interface, signature=u"s", access=u"read")
1048
def LastApprovalRequest_dbus_property(self):
1049
if self.last_approval_request is None:
1050
return dbus.String(u"")
1051
return dbus.String(self.
1052
_datetime_to_dbus(self
1053
.last_approval_request))
1054
1055
# Timeout - property
1056
@dbus_service_property(_interface, signature=u"t",
1057
access=u"readwrite")
1058
def Timeout_dbus_property(self, value=None):
1059
if value is None: # get
1060
return dbus.UInt64(self.timeout_milliseconds())
1061
self.timeout = datetime.timedelta(0, 0, 0, value)
1062
# Emit D-Bus signal
1063
self.PropertyChanged(dbus.String(u"Timeout"),
1064
dbus.UInt64(value, variant_level=1))
1065
if getattr(self, u"disable_initiator_tag", None) is None:
1066
return
1067
# Reschedule timeout
1068
gobject.source_remove(self.disable_initiator_tag)
1069
self.disable_initiator_tag = None
1070
time_to_die = (self.
1071
_timedelta_to_milliseconds((self
1072
.last_checked_ok
1073
+ self.timeout)
1074
- datetime.datetime
1075
.utcnow()))
1076
if time_to_die <= 0:
1077
# The timeout has passed
1078
self.disable()
1079
else:
1080
self.disable_initiator_tag = (gobject.timeout_add
1081
(time_to_die, self.disable))
1082
1083
# Interval - property
1084
@dbus_service_property(_interface, signature=u"t",
1085
access=u"readwrite")
1086
def Interval_dbus_property(self, value=None):
1087
if value is None: # get
1088
return dbus.UInt64(self.interval_milliseconds())
1089
self.interval = datetime.timedelta(0, 0, 0, value)
1090
# Emit D-Bus signal
1091
self.PropertyChanged(dbus.String(u"Interval"),
1092
dbus.UInt64(value, variant_level=1))
1093
if getattr(self, u"checker_initiator_tag", None) is None:
1094
return
1095
# Reschedule checker run
1096
gobject.source_remove(self.checker_initiator_tag)
1097
self.checker_initiator_tag = (gobject.timeout_add
1098
(value, self.start_checker))
1099
self.start_checker() # Start one now, too
1100
1101
# Checker - property
1102
@dbus_service_property(_interface, signature=u"s",
1103
access=u"readwrite")
1104
def Checker_dbus_property(self, value=None):
1105
if value is None: # get
1106
return dbus.String(self.checker_command)
1107
self.checker_command = value
1108
# Emit D-Bus signal
1109
self.PropertyChanged(dbus.String(u"Checker"),
1110
dbus.String(self.checker_command,
1111
variant_level=1))
1112
1113
# CheckerRunning - property
1114
@dbus_service_property(_interface, signature=u"b",
1115
access=u"readwrite")
1116
def CheckerRunning_dbus_property(self, value=None):
1117
if value is None: # get
1118
return dbus.Boolean(self.checker is not None)
1119
if value:
1120
self.start_checker()
1121
else:
1122
self.stop_checker()
1123
1124
# ObjectPath - property
1125
@dbus_service_property(_interface, signature=u"o", access=u"read")
1126
def ObjectPath_dbus_property(self):
1127
return self.dbus_object_path # is already a dbus.ObjectPath
1128
1129
# Secret = property
1130
@dbus_service_property(_interface, signature=u"ay",
1131
access=u"write", byte_arrays=True)
1132
def Secret_dbus_property(self, value):
1133
self.secret = str(value)
593
1134
594
1135
del _interface
595
1136
596
1137
597
def peer_certificate(session):
598
"Return the peer's OpenPGP certificate as a bytestring"
599
# If not an OpenPGP certificate...
600
if (gnutls.library.functions
601
.gnutls_certificate_type_get(session._c_object)
602
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
603
# ...do the normal thing
604
return session.peer_certificate
605
list_size = ctypes.c_uint(1)
606
cert_list = (gnutls.library.functions
607
.gnutls_certificate_get_peers
608
(session._c_object, ctypes.byref(list_size)))
609
if not bool(cert_list) and list_size.value != 0:
610
raise gnutls.errors.GNUTLSError("error getting peer"
611
" certificate")
612
if list_size.value == 0:
613
return None
614
cert = cert_list[0]
615
return ctypes.string_at(cert.data, cert.size)
616
617
618
def fingerprint(openpgp):
619
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
620
# New GnuTLS "datum" with the OpenPGP public key
621
datum = (gnutls.library.types
622
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
623
ctypes.POINTER
624
(ctypes.c_ubyte)),
625
ctypes.c_uint(len(openpgp))))
626
# New empty GnuTLS certificate
627
crt = gnutls.library.types.gnutls_openpgp_crt_t()
628
(gnutls.library.functions
629
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
630
# Import the OpenPGP public key into the certificate
631
(gnutls.library.functions
632
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
633
gnutls.library.constants
634
.GNUTLS_OPENPGP_FMT_RAW))
635
# Verify the self signature in the key
636
crtverify = ctypes.c_uint()
637
(gnutls.library.functions
638
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
639
if crtverify.value != 0:
640
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
641
raise gnutls.errors.CertificateSecurityError("Verify failed")
642
# New buffer for the fingerprint
643
buf = ctypes.create_string_buffer(20)
644
buf_len = ctypes.c_size_t()
645
# Get the fingerprint from the certificate into the buffer
646
(gnutls.library.functions
647
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
648
ctypes.byref(buf_len)))
649
# Deinit the certificate
650
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
651
# Convert the buffer to a Python bytestring
652
fpr = ctypes.string_at(buf, buf_len.value)
653
# Convert the bytestring to hexadecimal notation
654
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
655
return hex_fpr
656
657
658
class TCP_handler(SocketServer.BaseRequestHandler, object):
659
"""A TCP request handler class.
660
Instantiated by IPv6_TCPServer for each request to handle it.
1138
class ProxyClient(object):
1139
def __init__(self, child_pipe, fpr, address):
1140
self._pipe = child_pipe
1141
self._pipe.send(('init', fpr, address))
1142
if not self._pipe.recv():
1143
raise KeyError()
1144
1145
def __getattribute__(self, name):
1146
if(name == '_pipe'):
1147
return super(ProxyClient, self).__getattribute__(name)
1148
self._pipe.send(('getattr', name))
1149
data = self._pipe.recv()
1150
if data[0] == 'data':
1151
return data[1]
1152
if data[0] == 'function':
1153
def func(*args, **kwargs):
1154
self._pipe.send(('funcall', name, args, kwargs))
1155
return self._pipe.recv()[1]
1156
return func
1157
1158
def __setattr__(self, name, value):
1159
if(name == '_pipe'):
1160
return super(ProxyClient, self).__setattr__(name, value)
1161
self._pipe.send(('setattr', name, value))
1162
1163
1164
class ClientHandler(socketserver.BaseRequestHandler, object):
1165
"""A class to handle client connections.
1166
1167
Instantiated once for each connection to handle it.
661
1168
Note: This will run in its own forked process."""
662
1169
663
1170
def handle(self):
664
logger.info(u"TCP connection from: %s",
665
unicode(self.client_address))
666
session = (gnutls.connection
667
.ClientSession(self.request,
668
gnutls.connection
669
.X509Credentials()))
670
671
line = self.request.makefile().readline()
672
logger.debug(u"Protocol version: %r", line)
673
try:
674
if int(line.strip().split()[0]) > 1:
675
raise RuntimeError
676
except (ValueError, IndexError, RuntimeError), error:
677
logger.error(u"Unknown protocol version: %s", error)
678
return
679
680
# Note: gnutls.connection.X509Credentials is really a generic
681
# GnuTLS certificate credentials object so long as no X.509
682
# keys are added to it. Therefore, we can use it here despite
683
# using OpenPGP certificates.
684
685
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
686
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
687
# "+DHE-DSS"))
688
# Use a fallback default, since this MUST be set.
689
priority = self.server.settings.get("priority", "NORMAL")
690
(gnutls.library.functions
691
.gnutls_priority_set_direct(session._c_object,
692
priority, None))
693
694
try:
695
session.handshake()
696
except gnutls.errors.GNUTLSError, error:
697
logger.warning(u"Handshake failed: %s", error)
698
# Do not run session.bye() here: the session is not
699
# established. Just abandon the request.
700
return
701
logger.debug(u"Handshake succeeded")
702
try:
703
fpr = fingerprint(peer_certificate(session))
704
except (TypeError, gnutls.errors.GNUTLSError), error:
705
logger.warning(u"Bad certificate: %s", error)
706
session.bye()
707
return
708
logger.debug(u"Fingerprint: %s", fpr)
709
710
for c in self.server.clients:
711
if c.fingerprint == fpr:
712
client = c
713
break
714
else:
715
logger.warning(u"Client not found for fingerprint: %s",
716
fpr)
717
session.bye()
718
return
719
# Have to check if client.still_valid(), since it is possible
720
# that the client timed out while establishing the GnuTLS
721
# session.
722
if not client.still_valid():
723
logger.warning(u"Client %(name)s is invalid",
724
vars(client))
725
session.bye()
726
return
727
## This won't work here, since we're in a fork.
728
# client.checked_ok()
729
sent_size = 0
730
while sent_size < len(client.secret):
731
sent = session.send(client.secret[sent_size:])
732
logger.debug(u"Sent: %d, remaining: %d",
733
sent, len(client.secret)
734
- (sent_size + sent))
735
sent_size += sent
736
session.bye()
737
738
739
class IPv6_TCPServer(SocketServer.ForkingMixIn,
740
SocketServer.TCPServer, object):
741
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1171
with contextlib.closing(self.server.child_pipe) as child_pipe:
1172
logger.info(u"TCP connection from: %s",
1173
unicode(self.client_address))
1174
logger.debug(u"Pipe FD: %d",
1175
self.server.child_pipe.fileno())
1176
1177
session = (gnutls.connection
1178
.ClientSession(self.request,
1179
gnutls.connection
1180
.X509Credentials()))
1181
1182
# Note: gnutls.connection.X509Credentials is really a
1183
# generic GnuTLS certificate credentials object so long as
1184
# no X.509 keys are added to it. Therefore, we can use it
1185
# here despite using OpenPGP certificates.
1186
1187
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1188
# u"+AES-256-CBC", u"+SHA1",
1189
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1190
# u"+DHE-DSS"))
1191
# Use a fallback default, since this MUST be set.
1192
priority = self.server.gnutls_priority
1193
if priority is None:
1194
priority = u"NORMAL"
1195
(gnutls.library.functions
1196
.gnutls_priority_set_direct(session._c_object,
1197
priority, None))
1198
1199
# Start communication using the Mandos protocol
1200
# Get protocol number
1201
line = self.request.makefile().readline()
1202
logger.debug(u"Protocol version: %r", line)
1203
try:
1204
if int(line.strip().split()[0]) > 1:
1205
raise RuntimeError
1206
except (ValueError, IndexError, RuntimeError), error:
1207
logger.error(u"Unknown protocol version: %s", error)
1208
return
1209
1210
# Start GnuTLS connection
1211
try:
1212
session.handshake()
1213
except gnutls.errors.GNUTLSError, error:
1214
logger.warning(u"Handshake failed: %s", error)
1215
# Do not run session.bye() here: the session is not
1216
# established. Just abandon the request.
1217
return
1218
logger.debug(u"Handshake succeeded")
1219
1220
approval_required = False
1221
try:
1222
try:
1223
fpr = self.fingerprint(self.peer_certificate
1224
(session))
1225
except (TypeError, gnutls.errors.GNUTLSError), error:
1226
logger.warning(u"Bad certificate: %s", error)
1227
return
1228
logger.debug(u"Fingerprint: %s", fpr)
1229
1230
try:
1231
client = ProxyClient(child_pipe, fpr,
1232
self.client_address)
1233
except KeyError:
1234
return
1235
1236
if client.approval_delay:
1237
delay = client.approval_delay
1238
client.approvals_pending += 1
1239
approval_required = True
1240
1241
while True:
1242
if not client.enabled:
1243
logger.warning(u"Client %s is disabled",
1244
client.name)
1245
if self.server.use_dbus:
1246
# Emit D-Bus signal
1247
client.Rejected("Disabled")
1248
return
1249
1250
if client._approved or not client.approval_delay:
1251
#We are approved or approval is disabled
1252
break
1253
elif client._approved is None:
1254
logger.info(u"Client %s needs approval",
1255
client.name)
1256
if self.server.use_dbus:
1257
# Emit D-Bus signal
1258
client.NeedApproval(
1259
client.approval_delay_milliseconds(),
1260
client.approved_by_default)
1261
else:
1262
logger.warning(u"Client %s was not approved",
1263
client.name)
1264
if self.server.use_dbus:
1265
# Emit D-Bus signal
1266
client.Rejected("Denied")
1267
return
1268
1269
#wait until timeout or approved
1270
#x = float(client._timedelta_to_milliseconds(delay))
1271
time = datetime.datetime.now()
1272
client.changedstate.acquire()
1273
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1274
client.changedstate.release()
1275
time2 = datetime.datetime.now()
1276
if (time2 - time) >= delay:
1277
if not client.approved_by_default:
1278
logger.warning("Client %s timed out while"
1279
" waiting for approval",
1280
client.name)
1281
if self.server.use_dbus:
1282
# Emit D-Bus signal
1283
client.Rejected("Approval timed out")
1284
return
1285
else:
1286
break
1287
else:
1288
delay -= time2 - time
1289
1290
sent_size = 0
1291
while sent_size < len(client.secret):
1292
try:
1293
sent = session.send(client.secret[sent_size:])
1294
except (gnutls.errors.GNUTLSError), error:
1295
logger.warning("gnutls send failed")
1296
return
1297
logger.debug(u"Sent: %d, remaining: %d",
1298
sent, len(client.secret)
1299
- (sent_size + sent))
1300
sent_size += sent
1301
1302
logger.info(u"Sending secret to %s", client.name)
1303
# bump the timeout as if seen
1304
client.checked_ok()
1305
if self.server.use_dbus:
1306
# Emit D-Bus signal
1307
client.GotSecret()
1308
1309
finally:
1310
if approval_required:
1311
client.approvals_pending -= 1
1312
try:
1313
session.bye()
1314
except (gnutls.errors.GNUTLSError), error:
1315
logger.warning("GnuTLS bye failed")
1316
1317
@staticmethod
1318
def peer_certificate(session):
1319
"Return the peer's OpenPGP certificate as a bytestring"
1320
# If not an OpenPGP certificate...
1321
if (gnutls.library.functions
1322
.gnutls_certificate_type_get(session._c_object)
1323
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1324
# ...do the normal thing
1325
return session.peer_certificate
1326
list_size = ctypes.c_uint(1)
1327
cert_list = (gnutls.library.functions
1328
.gnutls_certificate_get_peers
1329
(session._c_object, ctypes.byref(list_size)))
1330
if not bool(cert_list) and list_size.value != 0:
1331
raise gnutls.errors.GNUTLSError(u"error getting peer"
1332
u" certificate")
1333
if list_size.value == 0:
1334
return None
1335
cert = cert_list[0]
1336
return ctypes.string_at(cert.data, cert.size)
1337
1338
@staticmethod
1339
def fingerprint(openpgp):
1340
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1341
# New GnuTLS "datum" with the OpenPGP public key
1342
datum = (gnutls.library.types
1343
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1344
ctypes.POINTER
1345
(ctypes.c_ubyte)),
1346
ctypes.c_uint(len(openpgp))))
1347
# New empty GnuTLS certificate
1348
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1349
(gnutls.library.functions
1350
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1351
# Import the OpenPGP public key into the certificate
1352
(gnutls.library.functions
1353
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1354
gnutls.library.constants
1355
.GNUTLS_OPENPGP_FMT_RAW))
1356
# Verify the self signature in the key
1357
crtverify = ctypes.c_uint()
1358
(gnutls.library.functions
1359
.gnutls_openpgp_crt_verify_self(crt, 0,
1360
ctypes.byref(crtverify)))
1361
if crtverify.value != 0:
1362
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1363
raise (gnutls.errors.CertificateSecurityError
1364
(u"Verify failed"))
1365
# New buffer for the fingerprint
1366
buf = ctypes.create_string_buffer(20)
1367
buf_len = ctypes.c_size_t()
1368
# Get the fingerprint from the certificate into the buffer
1369
(gnutls.library.functions
1370
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1371
ctypes.byref(buf_len)))
1372
# Deinit the certificate
1373
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1374
# Convert the buffer to a Python bytestring
1375
fpr = ctypes.string_at(buf, buf_len.value)
1376
# Convert the bytestring to hexadecimal notation
1377
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1378
return hex_fpr
1379
1380
1381
class MultiprocessingMixIn(object):
1382
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1383
def sub_process_main(self, request, address):
1384
try:
1385
self.finish_request(request, address)
1386
except:
1387
self.handle_error(request, address)
1388
self.close_request(request)
1389
1390
def process_request(self, request, address):
1391
"""Start a new process to process the request."""
1392
multiprocessing.Process(target = self.sub_process_main,
1393
args = (request, address)).start()
1394
1395
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1396
""" adds a pipe to the MixIn """
1397
def process_request(self, request, client_address):
1398
"""Overrides and wraps the original process_request().
1399
1400
This function creates a new pipe in self.pipe
1401
"""
1402
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1403
1404
super(MultiprocessingMixInWithPipe,
1405
self).process_request(request, client_address)
1406
self.child_pipe.close()
1407
self.add_pipe(parent_pipe)
1408
1409
def add_pipe(self, parent_pipe):
1410
"""Dummy function; override as necessary"""
1411
pass
1412
1413
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1414
socketserver.TCPServer, object):
1415
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1416
742
1417
Attributes:
743
settings: Server settings
744
clients: Set() of Client objects
745
1418
enabled: Boolean; whether this server is activated yet
1419
interface: None or a network interface name (string)
1420
use_ipv6: Boolean; to use IPv6 or not
746
1421
"""
747
address_family = socket.AF_INET6
748
def __init__(self, *args, **kwargs):
749
if "settings" in kwargs:
750
self.settings = kwargs["settings"]
751
del kwargs["settings"]
752
if "clients" in kwargs:
753
self.clients = kwargs["clients"]
754
del kwargs["clients"]
755
self.enabled = False
756
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1422
def __init__(self, server_address, RequestHandlerClass,
1423
interface=None, use_ipv6=True):
1424
self.interface = interface
1425
if use_ipv6:
1426
self.address_family = socket.AF_INET6
1427
socketserver.TCPServer.__init__(self, server_address,
1428
RequestHandlerClass)
757
1429
def server_bind(self):
758
1430
"""This overrides the normal server_bind() function
759
1431
to bind to an interface if one was specified, and also NOT to
760
1432
bind to an address or port if they were not specified."""
761
if self.settings["interface"]:
762
# 25 is from /usr/include/asm-i486/socket.h
763
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
764
try:
765
self.socket.setsockopt(socket.SOL_SOCKET,
766
SO_BINDTODEVICE,
767
self.settings["interface"])
768
except socket.error, error:
769
if error[0] == errno.EPERM:
770
logger.error(u"No permission to"
771
u" bind to interface %s",
772
self.settings["interface"])
773
else:
774
raise
1433
if self.interface is not None:
1434
if SO_BINDTODEVICE is None:
1435
logger.error(u"SO_BINDTODEVICE does not exist;"
1436
u" cannot bind to interface %s",
1437
self.interface)
1438
else:
1439
try:
1440
self.socket.setsockopt(socket.SOL_SOCKET,
1441
SO_BINDTODEVICE,
1442
str(self.interface
1443
+ u'\0'))
1444
except socket.error, error:
1445
if error[0] == errno.EPERM:
1446
logger.error(u"No permission to"
1447
u" bind to interface %s",
1448
self.interface)
1449
elif error[0] == errno.ENOPROTOOPT:
1450
logger.error(u"SO_BINDTODEVICE not available;"
1451
u" cannot bind to interface %s",
1452
self.interface)
1453
else:
1454
raise
775
1455
# Only bind(2) the socket if we really need to.
776
1456
if self.server_address[0] or self.server_address[1]:
777
1457
if not self.server_address[0]:
778
in6addr_any = "::"
779
self.server_address = (in6addr_any,
1458
if self.address_family == socket.AF_INET6:
1459
any_address = u"::" # in6addr_any
1460
else:
1461
any_address = socket.INADDR_ANY
1462
self.server_address = (any_address,
780
1463
self.server_address[1])
781
1464
elif not self.server_address[1]:
782
1465
self.server_address = (self.server_address[0],
783
1466
0)
784
# if self.settings["interface"]:
1467
# if self.interface:
785
1468
# self.server_address = (self.server_address[0],
786
1469
# 0, # port
787
1470
# 0, # flowinfo
788
1471
# if_nametoindex
789
# (self.settings
790
# ["interface"]))
791
return super(IPv6_TCPServer, self).server_bind()
1472
# (self.interface))
1473
return socketserver.TCPServer.server_bind(self)
1474
1475
1476
class MandosServer(IPv6_TCPServer):
1477
"""Mandos server.
1478
1479
Attributes:
1480
clients: set of Client objects
1481
gnutls_priority GnuTLS priority string
1482
use_dbus: Boolean; to emit D-Bus signals or not
1483
1484
Assumes a gobject.MainLoop event loop.
1485
"""
1486
def __init__(self, server_address, RequestHandlerClass,
1487
interface=None, use_ipv6=True, clients=None,
1488
gnutls_priority=None, use_dbus=True):
1489
self.enabled = False
1490
self.clients = clients
1491
if self.clients is None:
1492
self.clients = set()
1493
self.use_dbus = use_dbus
1494
self.gnutls_priority = gnutls_priority
1495
IPv6_TCPServer.__init__(self, server_address,
1496
RequestHandlerClass,
1497
interface = interface,
1498
use_ipv6 = use_ipv6)
792
1499
def server_activate(self):
793
1500
if self.enabled:
794
return super(IPv6_TCPServer, self).server_activate()
1501
return socketserver.TCPServer.server_activate(self)
795
1502
def enable(self):
796
1503
self.enabled = True
1504
def add_pipe(self, parent_pipe):
1505
# Call "handle_ipc" for both data and EOF events
1506
gobject.io_add_watch(parent_pipe.fileno(),
1507
gobject.IO_IN | gobject.IO_HUP,
1508
functools.partial(self.handle_ipc,
1509
parent_pipe = parent_pipe))
1510
1511
def handle_ipc(self, source, condition, parent_pipe=None,
1512
client_object=None):
1513
condition_names = {
1514
gobject.IO_IN: u"IN", # There is data to read.
1515
gobject.IO_OUT: u"OUT", # Data can be written (without
1516
# blocking).
1517
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1518
gobject.IO_ERR: u"ERR", # Error condition.
1519
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1520
# broken, usually for pipes and
1521
# sockets).
1522
}
1523
conditions_string = ' | '.join(name
1524
for cond, name in
1525
condition_names.iteritems()
1526
if cond & condition)
1527
# error or the other end of multiprocessing.Pipe has closed
1528
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1529
return False
1530
1531
# Read a request from the child
1532
request = parent_pipe.recv()
1533
command = request[0]
1534
1535
if command == 'init':
1536
fpr = request[1]
1537
address = request[2]
1538
1539
for c in self.clients:
1540
if c.fingerprint == fpr:
1541
client = c
1542
break
1543
else:
1544
logger.warning(u"Client not found for fingerprint: %s, ad"
1545
u"dress: %s", fpr, address)
1546
if self.use_dbus:
1547
# Emit D-Bus signal
1548
mandos_dbus_service.ClientNotFound(fpr, address[0])
1549
parent_pipe.send(False)
1550
return False
1551
1552
gobject.io_add_watch(parent_pipe.fileno(),
1553
gobject.IO_IN | gobject.IO_HUP,
1554
functools.partial(self.handle_ipc,
1555
parent_pipe = parent_pipe,
1556
client_object = client))
1557
parent_pipe.send(True)
1558
# remove the old hook in favor of the new above hook on same fileno
1559
return False
1560
if command == 'funcall':
1561
funcname = request[1]
1562
args = request[2]
1563
kwargs = request[3]
1564
1565
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1566
1567
if command == 'getattr':
1568
attrname = request[1]
1569
if callable(client_object.__getattribute__(attrname)):
1570
parent_pipe.send(('function',))
1571
else:
1572
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1573
1574
if command == 'setattr':
1575
attrname = request[1]
1576
value = request[2]
1577
setattr(client_object, attrname, value)
1578
1579
return True
797
1580
798
1581
799
1582
def string_to_delta(interval):
800
1583
"""Parse a string and return a datetime.timedelta
801
1584
802
>>> string_to_delta('7d')
1585
>>> string_to_delta(u'7d')
803
1586
datetime.timedelta(7)
804
>>> string_to_delta('60s')
1587
>>> string_to_delta(u'60s')
805
1588
datetime.timedelta(0, 60)
806
>>> string_to_delta('60m')
1589
>>> string_to_delta(u'60m')
807
1590
datetime.timedelta(0, 3600)
808
>>> string_to_delta('24h')
1591
>>> string_to_delta(u'24h')
809
1592
datetime.timedelta(1)
810
1593
>>> string_to_delta(u'1w')
811
1594
datetime.timedelta(7)
812
>>> string_to_delta('5m 30s')
1595
>>> string_to_delta(u'5m 30s')
813
1596
datetime.timedelta(0, 330)
814
1597
"""
815
1598
timevalue = datetime.timedelta(0)
828
1611
elif suffix == u"w":
829
1612
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
830
1613
else:
831
raise ValueError
832
except (ValueError, IndexError):
833
raise ValueError
1614
raise ValueError(u"Unknown suffix %r" % suffix)
1615
except (ValueError, IndexError), e:
1616
raise ValueError(e.message)
834
1617
timevalue += delta
835
1618
return timevalue
836
1619
837
1620
838
def server_state_changed(state):
839
"""Derived from the Avahi example code"""
840
if state == avahi.SERVER_COLLISION:
841
logger.error(u"Zeroconf server name collision")
842
service.remove()
843
elif state == avahi.SERVER_RUNNING:
844
service.add()
845
846
847
def entry_group_state_changed(state, error):
848
"""Derived from the Avahi example code"""
849
logger.debug(u"Avahi state change: %i", state)
850
851
if state == avahi.ENTRY_GROUP_ESTABLISHED:
852
logger.debug(u"Zeroconf service established.")
853
elif state == avahi.ENTRY_GROUP_COLLISION:
854
logger.warning(u"Zeroconf service name collision.")
855
service.rename()
856
elif state == avahi.ENTRY_GROUP_FAILURE:
857
logger.critical(u"Avahi: Error in group state changed %s",
858
unicode(error))
859
raise AvahiGroupError(u"State changed: %s" % unicode(error))
860
861
1621
def if_nametoindex(interface):
862
"""Call the C function if_nametoindex(), or equivalent"""
1622
"""Call the C function if_nametoindex(), or equivalent
1623
1624
Note: This function cannot accept a unicode string."""
863
1625
global if_nametoindex
864
1626
try:
865
1627
if_nametoindex = (ctypes.cdll.LoadLibrary
866
(ctypes.util.find_library("c"))
1628
(ctypes.util.find_library(u"c"))
867
1629
.if_nametoindex)
868
1630
except (OSError, AttributeError):
869
if "struct" not in sys.modules:
870
import struct
871
if "fcntl" not in sys.modules:
872
import fcntl
1631
logger.warning(u"Doing if_nametoindex the hard way")
873
1632
def if_nametoindex(interface):
874
1633
"Get an interface index the hard way, i.e. using fcntl()"
875
1634
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
876
with closing(socket.socket()) as s:
1635
with contextlib.closing(socket.socket()) as s:
877
1636
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
878
struct.pack("16s16x", interface))
879
interface_index = struct.unpack("I", ifreq[16:20])[0]
1637
struct.pack(str(u"16s16x"),
1638
interface))
1639
interface_index = struct.unpack(str(u"I"),
1640
ifreq[16:20])[0]
880
1641
return interface_index
881
1642
return if_nametoindex(interface)
882
1643
883
1644
884
1645
def daemon(nochdir = False, noclose = False):
885
1646
"""See daemon(3). Standard BSD Unix function.
1647
886
1648
This should really exist as os.daemon, but it doesn't (yet)."""
887
1649
if os.fork():
888
1650
sys.exit()
889
1651
os.setsid()
890
1652
if not nochdir:
891
os.chdir("/")
1653
os.chdir(u"/")
892
1654
if os.fork():
893
1655
sys.exit()
894
1656
if not noclose:
896
1658
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
897
1659
if not stat.S_ISCHR(os.fstat(null).st_mode):
898
1660
raise OSError(errno.ENODEV,
899
"/dev/null not a character device")
1661
u"%s not a character device"
1662
% os.path.devnull)
900
1663
os.dup2(null, sys.stdin.fileno())
901
1664
os.dup2(null, sys.stdout.fileno())
902
1665
os.dup2(null, sys.stderr.fileno())
905
1668
906
1669
907
1670
def main():
1671
1672
##################################################################
1673
# Parsing of options, both command line and config file
1674
908
1675
parser = optparse.OptionParser(version = "%%prog %s" % version)
909
parser.add_option("-i", "--interface", type="string",
910
metavar="IF", help="Bind to interface IF")
911
parser.add_option("-a", "--address", type="string",
912
help="Address to listen for requests on")
913
parser.add_option("-p", "--port", type="int",
914
help="Port number to receive requests on")
915
parser.add_option("--check", action="store_true",
916
help="Run self-test")
917
parser.add_option("--debug", action="store_true",
918
help="Debug mode; run in foreground and log to"
919
" terminal")
920
parser.add_option("--priority", type="string", help="GnuTLS"
921
" priority string (see GnuTLS documentation)")
922
parser.add_option("--servicename", type="string", metavar="NAME",
923
help="Zeroconf service name")
924
parser.add_option("--configdir", type="string",
925
default="/etc/mandos", metavar="DIR",
926
help="Directory to search for configuration"
927
" files")
928
parser.add_option("--no-dbus", action="store_false",
929
dest="use_dbus",
930
help="Do not provide D-Bus system bus"
931
" interface")
1676
parser.add_option("-i", u"--interface", type=u"string",
1677
metavar="IF", help=u"Bind to interface IF")
1678
parser.add_option("-a", u"--address", type=u"string",
1679
help=u"Address to listen for requests on")
1680
parser.add_option("-p", u"--port", type=u"int",
1681
help=u"Port number to receive requests on")
1682
parser.add_option("--check", action=u"store_true",
1683
help=u"Run self-test")
1684
parser.add_option("--debug", action=u"store_true",
1685
help=u"Debug mode; run in foreground and log to"
1686
u" terminal")
1687
parser.add_option("--debuglevel", type=u"string", metavar="LEVEL",
1688
help=u"Debug level for stdout output")
1689
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1690
u" priority string (see GnuTLS documentation)")
1691
parser.add_option("--servicename", type=u"string",
1692
metavar=u"NAME", help=u"Zeroconf service name")
1693
parser.add_option("--configdir", type=u"string",
1694
default=u"/etc/mandos", metavar=u"DIR",
1695
help=u"Directory to search for configuration"
1696
u" files")
1697
parser.add_option("--no-dbus", action=u"store_false",
1698
dest=u"use_dbus", help=u"Do not provide D-Bus"
1699
u" system bus interface")
1700
parser.add_option("--no-ipv6", action=u"store_false",
1701
dest=u"use_ipv6", help=u"Do not use IPv6")
932
1702
options = parser.parse_args()[0]
933
1703
934
1704
if options.check:
937
1707
sys.exit()
938
1708
939
1709
# Default values for config file for server-global settings
940
server_defaults = { "interface": "",
941
"address": "",
942
"port": "",
943
"debug": "False",
944
"priority":
945
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
946
"servicename": "Mandos",
947
"use_dbus": "True",
1710
server_defaults = { u"interface": u"",
1711
u"address": u"",
1712
u"port": u"",
1713
u"debug": u"False",
1714
u"priority":
1715
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1716
u"servicename": u"Mandos",
1717
u"use_dbus": u"True",
1718
u"use_ipv6": u"True",
1719
u"debuglevel": u"",
948
1720
}
949
1721
950
1722
# Parse config file for server-global settings
951
server_config = ConfigParser.SafeConfigParser(server_defaults)
1723
server_config = configparser.SafeConfigParser(server_defaults)
952
1724
del server_defaults
953
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1725
server_config.read(os.path.join(options.configdir,
1726
u"mandos.conf"))
954
1727
# Convert the SafeConfigParser object to a dict
955
1728
server_settings = server_config.defaults()
956
1729
# Use the appropriate methods on the non-string config options
957
server_settings["debug"] = server_config.getboolean("DEFAULT",
958
"debug")
959
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
960
"use_dbus")
1730
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1731
server_settings[option] = server_config.getboolean(u"DEFAULT",
1732
option)
961
1733
if server_settings["port"]:
962
server_settings["port"] = server_config.getint("DEFAULT",
963
"port")
1734
server_settings["port"] = server_config.getint(u"DEFAULT",
1735
u"port")
964
1736
del server_config
965
1737
966
1738
# Override the settings from the config file with command line
967
1739
# options, if set.
968
for option in ("interface", "address", "port", "debug",
969
"priority", "servicename", "configdir",
970
"use_dbus"):
1740
for option in (u"interface", u"address", u"port", u"debug",
1741
u"priority", u"servicename", u"configdir",
1742
u"use_dbus", u"use_ipv6", u"debuglevel"):
971
1743
value = getattr(options, option)
972
1744
if value is not None:
973
1745
server_settings[option] = value
974
1746
del options
1747
# Force all strings to be unicode
1748
for option in server_settings.keys():
1749
if type(server_settings[option]) is str:
1750
server_settings[option] = unicode(server_settings[option])
975
1751
# Now we have our good server settings in "server_settings"
976
1752
1753
##################################################################
1754
977
1755
# For convenience
978
debug = server_settings["debug"]
979
use_dbus = server_settings["use_dbus"]
980
981
if not debug:
982
syslogger.setLevel(logging.WARNING)
983
console.setLevel(logging.WARNING)
984
985
if server_settings["servicename"] != "Mandos":
1756
debug = server_settings[u"debug"]
1757
debuglevel = server_settings[u"debuglevel"]
1758
use_dbus = server_settings[u"use_dbus"]
1759
use_ipv6 = server_settings[u"use_ipv6"]
1760
1761
if server_settings[u"servicename"] != u"Mandos":
986
1762
syslogger.setFormatter(logging.Formatter
987
('Mandos (%s): %%(levelname)s:'
988
' %%(message)s'
989
% server_settings["servicename"]))
1763
(u'Mandos (%s) [%%(process)d]:'
1764
u' %%(levelname)s: %%(message)s'
1765
% server_settings[u"servicename"]))
990
1766
991
1767
# Parse config file with clients
992
client_defaults = { "timeout": "1h",
993
"interval": "5m",
994
"checker": "fping -q -- %%(host)s",
995
"host": "",
1768
client_defaults = { u"timeout": u"1h",
1769
u"interval": u"5m",
1770
u"checker": u"fping -q -- %%(host)s",
1771
u"host": u"",
1772
u"approval_delay": u"0s",
1773
u"approval_duration": u"1s",
996
1774
}
997
client_config = ConfigParser.SafeConfigParser(client_defaults)
998
client_config.read(os.path.join(server_settings["configdir"],
999
"clients.conf"))
1000
1001
clients = Set()
1002
tcp_server = IPv6_TCPServer((server_settings["address"],
1003
server_settings["port"]),
1004
TCP_handler,
1005
settings=server_settings,
1006
clients=clients)
1007
pidfilename = "/var/run/mandos.pid"
1008
try:
1009
pidfile = open(pidfilename, "w")
1010
except IOError:
1011
logger.error("Could not open file %r", pidfilename)
1012
1013
try:
1014
uid = pwd.getpwnam("_mandos").pw_uid
1015
gid = pwd.getpwnam("_mandos").pw_gid
1775
client_config = configparser.SafeConfigParser(client_defaults)
1776
client_config.read(os.path.join(server_settings[u"configdir"],
1777
u"clients.conf"))
1778
1779
global mandos_dbus_service
1780
mandos_dbus_service = None
1781
1782
tcp_server = MandosServer((server_settings[u"address"],
1783
server_settings[u"port"]),
1784
ClientHandler,
1785
interface=(server_settings[u"interface"]
1786
or None),
1787
use_ipv6=use_ipv6,
1788
gnutls_priority=
1789
server_settings[u"priority"],
1790
use_dbus=use_dbus)
1791
if not debug:
1792
pidfilename = u"/var/run/mandos.pid"
1793
try:
1794
pidfile = open(pidfilename, u"w")
1795
except IOError:
1796
logger.error(u"Could not open file %r", pidfilename)
1797
1798
try:
1799
uid = pwd.getpwnam(u"_mandos").pw_uid
1800
gid = pwd.getpwnam(u"_mandos").pw_gid
1016
1801
except KeyError:
1017
1802
try:
1018
uid = pwd.getpwnam("mandos").pw_uid
1019
gid = pwd.getpwnam("mandos").pw_gid
1803
uid = pwd.getpwnam(u"mandos").pw_uid
1804
gid = pwd.getpwnam(u"mandos").pw_gid
1020
1805
except KeyError:
1021
1806
try:
1022
uid = pwd.getpwnam("nobody").pw_uid
1023
gid = pwd.getpwnam("nogroup").pw_gid
1807
uid = pwd.getpwnam(u"nobody").pw_uid
1808
gid = pwd.getpwnam(u"nobody").pw_gid
1024
1809
except KeyError:
1025
1810
uid = 65534
1026
1811
gid = 65534
1031
1816
if error[0] != errno.EPERM:
1032
1817
raise error
1033
1818
1034
# Enable all possible GnuTLS debugging
1819
if not debug and not debuglevel:
1820
syslogger.setLevel(logging.WARNING)
1821
console.setLevel(logging.WARNING)
1822
if debuglevel:
1823
level = getattr(logging, debuglevel.upper())
1824
syslogger.setLevel(level)
1825
console.setLevel(level)
1826
1035
1827
if debug:
1828
# Enable all possible GnuTLS debugging
1829
1036
1830
# "Use a log level over 10 to enable all debugging options."
1037
1831
# - GnuTLS manual
1038
1832
gnutls.library.functions.gnutls_global_set_log_level(11)
1039
1833
1040
1834
@gnutls.library.types.gnutls_log_func
1041
1835
def debug_gnutls(level, string):
1042
logger.debug("GnuTLS: %s", string[:-1])
1836
logger.debug(u"GnuTLS: %s", string[:-1])
1043
1837
1044
1838
(gnutls.library.functions
1045
1839
.gnutls_global_set_log_function(debug_gnutls))
1840
1841
# Redirect stdin so all checkers get /dev/null
1842
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1843
os.dup2(null, sys.stdin.fileno())
1844
if null > 2:
1845
os.close(null)
1846
else:
1847
# No console logging
1848
logger.removeHandler(console)
1046
1849
1047
global service
1048
service = AvahiService(name = server_settings["servicename"],
1049
servicetype = "_mandos._tcp", )
1050
if server_settings["interface"]:
1051
service.interface = (if_nametoindex
1052
(server_settings["interface"]))
1053
1850
1054
1851
global main_loop
1055
global bus
1056
global server
1057
1852
# From the Avahi example code
1058
1853
DBusGMainLoop(set_as_default=True )
1059
1854
main_loop = gobject.MainLoop()
1060
1855
bus = dbus.SystemBus()
1061
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1062
avahi.DBUS_PATH_SERVER),
1063
avahi.DBUS_INTERFACE_SERVER)
1064
1856
# End of Avahi example code
1065
1857
if use_dbus:
1066
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1067
1068
clients.update(Set(Client(name = section,
1069
config
1070
= dict(client_config.items(section)),
1071
use_dbus = use_dbus)
1072
for section in client_config.sections()))
1073
if not clients:
1074
logger.warning(u"No clients defined")
1075
1076
if debug:
1077
# Redirect stdin so all checkers get /dev/null
1078
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1079
os.dup2(null, sys.stdin.fileno())
1080
if null > 2:
1081
os.close(null)
1082
else:
1083
# No console logging
1084
logger.removeHandler(console)
1858
try:
1859
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1860
bus, do_not_queue=True)
1861
except dbus.exceptions.NameExistsException, e:
1862
logger.error(unicode(e) + u", disabling D-Bus")
1863
use_dbus = False
1864
server_settings[u"use_dbus"] = False
1865
tcp_server.use_dbus = False
1866
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1867
service = AvahiService(name = server_settings[u"servicename"],
1868
servicetype = u"_mandos._tcp",
1869
protocol = protocol, bus = bus)
1870
if server_settings["interface"]:
1871
service.interface = (if_nametoindex
1872
(str(server_settings[u"interface"])))
1873
1874
if not debug:
1085
1875
# Close all input and output, do double fork, etc.
1086
1876
daemon()
1087
1088
try:
1089
pid = os.getpid()
1090
pidfile.write(str(pid) + "\n")
1091
pidfile.close()
1092
del pidfile
1093
except IOError:
1094
logger.error(u"Could not write to file %r with PID %d",
1095
pidfilename, pid)
1096
except NameError:
1097
# "pidfile" was never created
1098
pass
1099
del pidfilename
1100
1101
def cleanup():
1102
"Cleanup function; run on exit"
1103
global group
1104
# From the Avahi example code
1105
if not group is None:
1106
group.Free()
1107
group = None
1108
# End of Avahi example code
1109
1110
while clients:
1111
client = clients.pop()
1112
client.disable_hook = None
1113
client.disable()
1114
1115
atexit.register(cleanup)
1116
1877
1878
global multiprocessing_manager
1879
multiprocessing_manager = multiprocessing.Manager()
1880
1881
client_class = Client
1882
if use_dbus:
1883
client_class = functools.partial(ClientDBus, bus = bus)
1884
def client_config_items(config, section):
1885
special_settings = {
1886
"approved_by_default":
1887
lambda: config.getboolean(section,
1888
"approved_by_default"),
1889
}
1890
for name, value in config.items(section):
1891
try:
1892
yield (name, special_settings[name]())
1893
except KeyError:
1894
yield (name, value)
1895
1896
tcp_server.clients.update(set(
1897
client_class(name = section,
1898
config= dict(client_config_items(
1899
client_config, section)))
1900
for section in client_config.sections()))
1901
if not tcp_server.clients:
1902
logger.warning(u"No clients defined")
1903
1117
1904
if not debug:
1905
try:
1906
with pidfile:
1907
pid = os.getpid()
1908
pidfile.write(str(pid) + "\n")
1909
del pidfile
1910
except IOError:
1911
logger.error(u"Could not write to file %r with PID %d",
1912
pidfilename, pid)
1913
except NameError:
1914
# "pidfile" was never created
1915
pass
1916
del pidfilename
1917
1118
1918
signal.signal(signal.SIGINT, signal.SIG_IGN)
1919
1119
1920
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1120
1921
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1121
1922
1122
1923
if use_dbus:
1123
class MandosServer(dbus.service.Object):
1924
class MandosDBusService(dbus.service.Object):
1124
1925
"""A D-Bus proxy object"""
1125
1926
def __init__(self):
1126
dbus.service.Object.__init__(self, bus, "/")
1927
dbus.service.Object.__init__(self, bus, u"/")
1127
1928
_interface = u"se.bsnet.fukt.Mandos"
1128
1929
1129
@dbus.service.signal(_interface, signature="oa{sv}")
1130
def ClientAdded(self, objpath, properties):
1131
"D-Bus signal"
1132
pass
1133
1134
@dbus.service.signal(_interface, signature="os")
1930
@dbus.service.signal(_interface, signature=u"o")
1931
def ClientAdded(self, objpath):
1932
"D-Bus signal"
1933
pass
1934
1935
@dbus.service.signal(_interface, signature=u"ss")
1936
def ClientNotFound(self, fingerprint, address):
1937
"D-Bus signal"
1938
pass
1939
1940
@dbus.service.signal(_interface, signature=u"os")
1135
1941
def ClientRemoved(self, objpath, name):
1136
1942
"D-Bus signal"
1137
1943
pass
1138
1944
1139
@dbus.service.method(_interface, out_signature="ao")
1945
@dbus.service.method(_interface, out_signature=u"ao")
1140
1946
def GetAllClients(self):
1141
1947
"D-Bus method"
1142
return dbus.Array(c.dbus_object_path for c in clients)
1948
return dbus.Array(c.dbus_object_path
1949
for c in tcp_server.clients)
1143
1950
1144
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1951
@dbus.service.method(_interface,
1952
out_signature=u"a{oa{sv}}")
1145
1953
def GetAllClientsWithProperties(self):
1146
1954
"D-Bus method"
1147
1955
return dbus.Dictionary(
1148
((c.dbus_object_path, c.GetAllProperties())
1149
for c in clients),
1150
signature="oa{sv}")
1956
((c.dbus_object_path, c.GetAll(u""))
1957
for c in tcp_server.clients),
1958
signature=u"oa{sv}")
1151
1959
1152
@dbus.service.method(_interface, in_signature="o")
1960
@dbus.service.method(_interface, in_signature=u"o")
1153
1961
def RemoveClient(self, object_path):
1154
1962
"D-Bus method"
1155
for c in clients:
1963
for c in tcp_server.clients:
1156
1964
if c.dbus_object_path == object_path:
1157
clients.remove(c)
1965
tcp_server.clients.remove(c)
1966
c.remove_from_connection()
1158
1967
# Don't signal anything except ClientRemoved
1159
c.use_dbus = False
1160
c.disable()
1968
c.disable(quiet=True)
1161
1969
# Emit D-Bus signal
1162
1970
self.ClientRemoved(object_path, c.name)
1163
1971
return
1164
raise KeyError
1972
raise KeyError(object_path)
1165
1973
1166
1974
del _interface
1167
1975
1168
mandos_server = MandosServer()
1169
1170
for client in clients:
1976
mandos_dbus_service = MandosDBusService()
1977
1978
def cleanup():
1979
"Cleanup function; run on exit"
1980
service.cleanup()
1981
1982
while tcp_server.clients:
1983
client = tcp_server.clients.pop()
1984
if use_dbus:
1985
client.remove_from_connection()
1986
client.disable_hook = None
1987
# Don't signal anything except ClientRemoved
1988
client.disable(quiet=True)
1989
if use_dbus:
1990
# Emit D-Bus signal
1991
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1992
client.name)
1993
1994
atexit.register(cleanup)
1995
1996
for client in tcp_server.clients:
1171
1997
if use_dbus:
1172
1998
# Emit D-Bus signal
1173
mandos_server.ClientAdded(client.dbus_object_path,
1174
client.GetAllProperties())
1999
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1175
2000
client.enable()
1176
2001
1177
2002
tcp_server.enable()
1179
2004
1180
2005
# Find out what port we got
1181
2006
service.port = tcp_server.socket.getsockname()[1]
1182
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1183
u" scope_id %d" % tcp_server.socket.getsockname())
2007
if use_ipv6:
2008
logger.info(u"Now listening on address %r, port %d,"
2009
" flowinfo %d, scope_id %d"
2010
% tcp_server.socket.getsockname())
2011
else: # IPv4
2012
logger.info(u"Now listening on address %r, port %d"
2013
% tcp_server.socket.getsockname())
1184
2014
1185
2015
#service.interface = tcp_server.socket.getsockname()[3]
1186
2016
1187
2017
try:
1188
2018
# From the Avahi example code
1189
server.connect_to_signal("StateChanged", server_state_changed)
1190
2019
try:
1191
server_state_changed(server.GetState())
2020
service.activate()
1192
2021
except dbus.exceptions.DBusException, error:
1193
2022
logger.critical(u"DBusException: %s", error)
2023
cleanup()
1194
2024
sys.exit(1)
1195
2025
# End of Avahi example code
1196
2026
1203
2033
main_loop.run()
1204
2034
except AvahiError, error:
1205
2035
logger.critical(u"AvahiError: %s", error)
2036
cleanup()
1206
2037
sys.exit(1)
1207
2038
except KeyboardInterrupt:
1208
2039
if debug:
1209
2040
print >> sys.stderr
1210
logger.debug("Server received KeyboardInterrupt")
1211
logger.debug("Server exiting")
2041
logger.debug(u"Server received KeyboardInterrupt")
2042
logger.debug(u"Server exiting")
2043
# Must run before the D-Bus bus name gets deregistered
2044
cleanup()
1212
2045
1213
2046
if __name__ == '__main__':
1214
2047
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0