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- Committer: teddy at bsnet
- Date: 2010-09-23 20:14:08 UTC
- Revision ID: teddy@fukt.bsnet.se-20100923201408-4vcvjmml000fr8y5
* Makefile (DOCS): Added "plymouth.8mandos".
(install-server): Also install "mandos-monitor.8" and
"mandos-ctl.8".
(install-client-nokey): Also install "plymouth.8mandos".
(uninstall-server): Also remove "mandos-monitor.8" and
"mandos-ctl.8".
(uninstall-client): Also remove "plymouth.8mandos".
* plugins.d/plymouth.xml: New.
(install-server): Also install "mandos-monitor.8" and
"mandos-ctl.8".
(install-client-nokey): Also install "plymouth.8mandos".
(uninstall-server): Also remove "mandos-monitor.8" and
"mandos-ctl.8".
(uninstall-client): Also remove "plymouth.8mandos".
* plugins.d/plymouth.xml: New.
- files added:
- DBUS-API
- files removed:
- debian/mandos-client.config
- files renamed:
- mandos-list => mandos-ctl
- files modified:
- INSTALL
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".
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008 Teddy Hogeborn
15
# Copyright © 2008 Björn Påhlsson
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
16
16
#
17
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# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
33
33
34
34
from __future__ import division, with_statement, absolute_import
35
35
36
import SocketServer
36
import SocketServer as socketserver
37
37
import socket
38
from optparse import OptionParser
38
import optparse
39
39
import datetime
40
40
import errno
41
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import gnutls.crypto
44
44
import gnutls.library.functions
45
45
import gnutls.library.constants
46
46
import gnutls.library.types
47
import ConfigParser
47
import ConfigParser as configparser
48
48
import sys
49
49
import re
50
50
import os
51
51
import signal
52
from sets import Set
53
52
import subprocess
54
53
import atexit
55
54
import stat
56
55
import logging
57
56
import logging.handlers
58
57
import pwd
59
from contextlib import closing
58
import contextlib
59
import struct
60
import fcntl
61
import functools
62
import cPickle as pickle
63
import multiprocessing
60
64
61
65
import dbus
62
66
import dbus.service
65
69
from dbus.mainloop.glib import DBusGMainLoop
66
70
import ctypes
67
71
import ctypes.util
68
69
version = "1.0.2"
70
71
logger = logging.Logger('mandos')
72
import xml.dom.minidom
73
import inspect
74
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
82
83
84
version = "1.0.14"
85
86
#logger = logging.getLogger(u'mandos')
87
logger = logging.Logger(u'mandos')
72
88
syslogger = (logging.handlers.SysLogHandler
73
89
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
90
address = "/dev/log"))
75
91
syslogger.setFormatter(logging.Formatter
76
('Mandos: %(levelname)s: %(message)s'))
92
(u'Mandos [%(process)d]: %(levelname)s:'
93
u' %(message)s'))
77
94
logger.addHandler(syslogger)
78
95
79
96
console = logging.StreamHandler()
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
81
' %(message)s'))
97
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
98
u' %(levelname)s:'
99
u' %(message)s'))
82
100
logger.addHandler(console)
83
101
84
102
class AvahiError(Exception):
85
def __init__(self, value):
103
def __init__(self, value, *args, **kwargs):
86
104
self.value = value
87
super(AvahiError, self).__init__()
88
def __str__(self):
89
return repr(self.value)
105
super(AvahiError, self).__init__(value, *args, **kwargs)
106
def __unicode__(self):
107
return unicode(repr(self.value))
90
108
91
109
class AvahiServiceError(AvahiError):
92
110
pass
97
115
98
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class AvahiService(object):
99
117
"""An Avahi (Zeroconf) service.
118
100
119
Attributes:
101
120
interface: integer; avahi.IF_UNSPEC or an interface index.
102
121
Used to optionally bind to the specified interface.
103
name: string; Example: 'Mandos'
104
type: string; Example: '_mandos._tcp'.
122
name: string; Example: u'Mandos'
123
type: string; Example: u'_mandos._tcp'.
105
124
See <http://www.dns-sd.org/ServiceTypes.html>
106
125
port: integer; what port to announce
107
126
TXT: list of strings; TXT record for the service
110
129
max_renames: integer; maximum number of renames
111
130
rename_count: integer; counter so we only rename after collisions
112
131
a sensible number of times
132
group: D-Bus Entry Group
133
server: D-Bus Server
134
bus: dbus.SystemBus()
113
135
"""
114
136
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
137
servicetype = None, port = None, TXT = None,
116
domain = "", host = "", max_renames = 32768):
138
domain = u"", host = u"", max_renames = 32768,
139
protocol = avahi.PROTO_UNSPEC, bus = None):
117
140
self.interface = interface
118
141
self.name = name
119
142
self.type = servicetype
123
146
self.host = host
124
147
self.rename_count = 0
125
148
self.max_renames = max_renames
149
self.protocol = protocol
150
self.group = None # our entry group
151
self.server = None
152
self.bus = bus
126
153
def rename(self):
127
154
"""Derived from the Avahi example code"""
128
155
if self.rename_count >= self.max_renames:
129
156
logger.critical(u"No suitable Zeroconf service name found"
130
157
u" after %i retries, exiting.",
131
158
self.rename_count)
132
raise AvahiServiceError("Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
159
raise AvahiServiceError(u"Too many renames")
160
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
134
161
logger.info(u"Changing Zeroconf service name to %r ...",
135
str(self.name))
162
self.name)
136
163
syslogger.setFormatter(logging.Formatter
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
164
(u'Mandos (%s) [%%(process)d]:'
165
u' %%(levelname)s: %%(message)s'
166
% self.name))
139
167
self.remove()
140
self.add()
168
try:
169
self.add()
170
except dbus.exceptions.DBusException, error:
171
logger.critical(u"DBusException: %s", error)
172
self.cleanup()
173
os._exit(1)
141
174
self.rename_count += 1
142
175
def remove(self):
143
176
"""Derived from the Avahi example code"""
144
if group is not None:
145
group.Reset()
177
if self.group is not None:
178
self.group.Reset()
146
179
def add(self):
147
180
"""Derived from the Avahi example code"""
148
global group
149
if group is None:
150
group = dbus.Interface(bus.get_object
151
(avahi.DBUS_NAME,
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
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)
186
self.group.connect_to_signal('StateChanged',
187
self
188
.entry_group_state_changed)
156
189
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
157
service.name, service.type)
158
group.AddService(
159
self.interface, # interface
160
avahi.PROTO_INET6, # protocol
161
dbus.UInt32(0), # flags
162
self.name, self.type,
163
self.domain, self.host,
164
dbus.UInt16(self.port),
165
avahi.string_array_to_txt_array(self.TXT))
166
group.Commit()
167
168
# From the Avahi example code:
169
group = None # our entry group
170
# End of Avahi example code
171
172
173
def _datetime_to_dbus(dt, variant_level=0):
174
"""Convert a UTC datetime.datetime() to a D-Bus type."""
175
return dbus.String(dt.isoformat(), variant_level=variant_level)
176
177
178
class Client(dbus.service.Object):
190
self.name, self.type)
191
self.group.AddService(
192
self.interface,
193
self.protocol,
194
dbus.UInt32(0), # flags
195
self.name, self.type,
196
self.domain, self.host,
197
dbus.UInt16(self.port),
198
avahi.string_array_to_txt_array(self.TXT))
199
self.group.Commit()
200
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)
203
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.")
208
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())
237
238
239
class Client(object):
179
240
"""A representation of a client host served by this server.
241
180
242
Attributes:
181
name: string; from the config file, used in log messages
243
name: string; from the config file, used in log messages and
244
D-Bus identifiers
182
245
fingerprint: string (40 or 32 hexadecimal digits); used to
183
246
uniquely identify the client
184
247
secret: bytestring; sent verbatim (over TLS) to client
188
251
enabled: bool()
189
252
last_checked_ok: datetime.datetime(); (UTC) or None
190
253
timeout: datetime.timedelta(); How long from last_checked_ok
191
until this client is invalid
254
until this client is disabled
192
255
interval: datetime.timedelta(); How often to start a new checker
193
256
disable_hook: If set, called by disable() as disable_hook(self)
194
257
checker: subprocess.Popen(); a running checker process used
195
258
to see if the client lives.
196
259
'None' if no process is running.
197
260
checker_initiator_tag: a gobject event source tag, or None
198
disable_initiator_tag: - '' -
261
disable_initiator_tag: - '' -
199
262
checker_callback_tag: - '' -
200
263
checker_command: string; External command which is run to check if
201
264
client lives. %() expansions are done at
202
265
runtime with vars(self) as dict, so that for
203
266
instance %(name)s can be used in the command.
204
dbus_object_path: dbus.ObjectPath
205
Private attibutes:
206
_timeout: Real variable for 'timeout'
207
_interval: Real variable for 'interval'
208
_timeout_milliseconds: Used when calling gobject.timeout_add()
209
_interval_milliseconds: - '' -
267
current_checker_command: string; current running checker_command
268
approval_delay: datetime.timedelta(); Time to wait for approval
269
_approved: bool(); 'None' if not yet approved/disapproved
270
approval_duration: datetime.timedelta(); Duration of one approval
210
271
"""
211
def _set_timeout(self, timeout):
212
"Setter function for the 'timeout' attribute"
213
self._timeout = timeout
214
self._timeout_milliseconds = ((self.timeout.days
215
* 24 * 60 * 60 * 1000)
216
+ (self.timeout.seconds * 1000)
217
+ (self.timeout.microseconds
218
// 1000))
219
# Emit D-Bus signal
220
self.PropertyChanged(dbus.String(u"timeout"),
221
(dbus.UInt64(self._timeout_milliseconds,
222
variant_level=1)))
223
timeout = property(lambda self: self._timeout, _set_timeout)
224
del _set_timeout
225
226
def _set_interval(self, interval):
227
"Setter function for the 'interval' attribute"
228
self._interval = interval
229
self._interval_milliseconds = ((self.interval.days
230
* 24 * 60 * 60 * 1000)
231
+ (self.interval.seconds
232
* 1000)
233
+ (self.interval.microseconds
234
// 1000))
235
# Emit D-Bus signal
236
self.PropertyChanged(dbus.String(u"interval"),
237
(dbus.UInt64(self._interval_milliseconds,
238
variant_level=1)))
239
interval = property(lambda self: self._interval, _set_interval)
240
del _set_interval
272
273
@staticmethod
274
def _timedelta_to_milliseconds(td):
275
"Convert a datetime.timedelta() to milliseconds"
276
return ((td.days * 24 * 60 * 60 * 1000)
277
+ (td.seconds * 1000)
278
+ (td.microseconds // 1000))
279
280
def timeout_milliseconds(self):
281
"Return the 'timeout' attribute in milliseconds"
282
return self._timedelta_to_milliseconds(self.timeout)
283
284
def interval_milliseconds(self):
285
"Return the 'interval' attribute in milliseconds"
286
return self._timedelta_to_milliseconds(self.interval)
287
288
def approval_delay_milliseconds(self):
289
return self._timedelta_to_milliseconds(self.approval_delay)
241
290
242
291
def __init__(self, name = None, disable_hook=None, config=None):
243
292
"""Note: the 'checker' key in 'config' sets the
244
293
'checker_command' attribute and *not* the 'checker'
245
294
attribute."""
246
self.dbus_object_path = (dbus.ObjectPath
247
("/Mandos/clients/"
248
+ name.replace(".", "_")))
249
dbus.service.Object.__init__(self, bus,
250
self.dbus_object_path)
295
self.name = name
251
296
if config is None:
252
297
config = {}
253
self.name = name
254
298
logger.debug(u"Creating client %r", self.name)
255
299
# Uppercase and remove spaces from fingerprint for later
256
300
# comparison purposes with return value from the fingerprint()
257
301
# function
258
self.fingerprint = (config["fingerprint"].upper()
302
self.fingerprint = (config[u"fingerprint"].upper()
259
303
.replace(u" ", u""))
260
304
logger.debug(u" Fingerprint: %s", self.fingerprint)
261
if "secret" in config:
262
self.secret = config["secret"].decode(u"base64")
263
elif "secfile" in config:
264
with closing(open(os.path.expanduser
265
(os.path.expandvars
266
(config["secfile"])))) as secfile:
305
if u"secret" in config:
306
self.secret = config[u"secret"].decode(u"base64")
307
elif u"secfile" in config:
308
with open(os.path.expanduser(os.path.expandvars
309
(config[u"secfile"])),
310
"rb") as secfile:
267
311
self.secret = secfile.read()
268
312
else:
269
313
raise TypeError(u"No secret or secfile for client %s"
270
314
% self.name)
271
self.host = config.get("host", "")
315
self.host = config.get(u"host", u"")
272
316
self.created = datetime.datetime.utcnow()
273
317
self.enabled = False
274
318
self.last_enabled = None
275
319
self.last_checked_ok = None
276
self.timeout = string_to_delta(config["timeout"])
277
self.interval = string_to_delta(config["interval"])
320
self.timeout = string_to_delta(config[u"timeout"])
321
self.interval = string_to_delta(config[u"interval"])
278
322
self.disable_hook = disable_hook
279
323
self.checker = None
280
324
self.checker_initiator_tag = None
281
325
self.disable_initiator_tag = None
282
326
self.checker_callback_tag = None
283
self.checker_command = config["checker"]
327
self.checker_command = config[u"checker"]
328
self.current_checker_command = None
329
self.last_connect = None
330
self._approved = None
331
self.approved_by_default = config.get(u"approved_by_default",
332
True)
333
self.approvals_pending = 0
334
self.approval_delay = string_to_delta(
335
config[u"approval_delay"])
336
self.approval_duration = string_to_delta(
337
config[u"approval_duration"])
338
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
284
339
340
def send_changedstate(self):
341
self.changedstate.acquire()
342
self.changedstate.notify_all()
343
self.changedstate.release()
344
285
345
def enable(self):
286
346
"""Start this client's checker and timeout hooks"""
347
if getattr(self, u"enabled", False):
348
# Already enabled
349
return
350
self.send_changedstate()
287
351
self.last_enabled = datetime.datetime.utcnow()
288
352
# Schedule a new checker to be started an 'interval' from now,
289
353
# and every interval from then on.
290
354
self.checker_initiator_tag = (gobject.timeout_add
291
(self._interval_milliseconds,
355
(self.interval_milliseconds(),
292
356
self.start_checker))
293
# Also start a new checker *right now*.
294
self.start_checker()
295
357
# Schedule a disable() when 'timeout' has passed
296
358
self.disable_initiator_tag = (gobject.timeout_add
297
(self._timeout_milliseconds,
359
(self.timeout_milliseconds(),
298
360
self.disable))
299
361
self.enabled = True
300
# Emit D-Bus signal
301
self.PropertyChanged(dbus.String(u"enabled"),
302
dbus.Boolean(True, variant_level=1))
303
self.PropertyChanged(dbus.String(u"last_enabled"),
304
(_datetime_to_dbus(self.last_enabled,
305
variant_level=1)))
362
# Also start a new checker *right now*.
363
self.start_checker()
306
364
307
def disable(self):
365
def disable(self, quiet=True):
308
366
"""Disable this client."""
309
367
if not getattr(self, "enabled", False):
310
368
return False
311
logger.info(u"Disabling client %s", self.name)
312
if getattr(self, "disable_initiator_tag", False):
369
if not quiet:
370
self.send_changedstate()
371
if not quiet:
372
logger.info(u"Disabling client %s", self.name)
373
if getattr(self, u"disable_initiator_tag", False):
313
374
gobject.source_remove(self.disable_initiator_tag)
314
375
self.disable_initiator_tag = None
315
if getattr(self, "checker_initiator_tag", False):
376
if getattr(self, u"checker_initiator_tag", False):
316
377
gobject.source_remove(self.checker_initiator_tag)
317
378
self.checker_initiator_tag = None
318
379
self.stop_checker()
319
380
if self.disable_hook:
320
381
self.disable_hook(self)
321
382
self.enabled = False
322
# Emit D-Bus signal
323
self.PropertyChanged(dbus.String(u"enabled"),
324
dbus.Boolean(False, variant_level=1))
325
383
# Do not run this again if called by a gobject.timeout_add
326
384
return False
327
385
333
391
"""The checker has completed, so take appropriate actions."""
334
392
self.checker_callback_tag = None
335
393
self.checker = None
336
# Emit D-Bus signal
337
self.PropertyChanged(dbus.String(u"checker_running"),
338
dbus.Boolean(False, variant_level=1))
339
if (os.WIFEXITED(condition)
340
and (os.WEXITSTATUS(condition) == 0)):
341
logger.info(u"Checker for %(name)s succeeded",
342
vars(self))
343
# Emit D-Bus signal
344
self.CheckerCompleted(dbus.Boolean(True),
345
dbus.UInt16(condition),
346
dbus.String(command))
347
self.bump_timeout()
348
elif not os.WIFEXITED(condition):
394
if os.WIFEXITED(condition):
395
exitstatus = os.WEXITSTATUS(condition)
396
if exitstatus == 0:
397
logger.info(u"Checker for %(name)s succeeded",
398
vars(self))
399
self.checked_ok()
400
else:
401
logger.info(u"Checker for %(name)s failed",
402
vars(self))
403
else:
349
404
logger.warning(u"Checker for %(name)s crashed?",
350
405
vars(self))
351
# Emit D-Bus signal
352
self.CheckerCompleted(dbus.Boolean(False),
353
dbus.UInt16(condition),
354
dbus.String(command))
355
else:
356
logger.info(u"Checker for %(name)s failed",
357
vars(self))
358
# Emit D-Bus signal
359
self.CheckerCompleted(dbus.Boolean(False),
360
dbus.UInt16(condition),
361
dbus.String(command))
362
406
363
def bump_timeout(self):
407
def checked_ok(self):
364
408
"""Bump up the timeout for this client.
409
365
410
This should only be called when the client has been seen,
366
411
alive and well.
367
412
"""
368
413
self.last_checked_ok = datetime.datetime.utcnow()
369
414
gobject.source_remove(self.disable_initiator_tag)
370
415
self.disable_initiator_tag = (gobject.timeout_add
371
(self._timeout_milliseconds,
416
(self.timeout_milliseconds(),
372
417
self.disable))
373
self.PropertyChanged(dbus.String(u"last_checked_ok"),
374
(_datetime_to_dbus(self.last_checked_ok,
375
variant_level=1)))
376
418
377
419
def start_checker(self):
378
420
"""Start a new checker subprocess if one is not running.
421
379
422
If a checker already exists, leave it running and do
380
423
nothing."""
381
424
# The reason for not killing a running checker is that if we
384
427
# client would inevitably timeout, since no checker would get
385
428
# a chance to run to completion. If we instead leave running
386
429
# checkers alone, the checker would have to take more time
387
# than 'timeout' for the client to be declared invalid, which
388
# is as it should be.
430
# than 'timeout' for the client to be disabled, which is as it
431
# should be.
432
433
# If a checker exists, make sure it is not a zombie
434
try:
435
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
436
except (AttributeError, OSError), error:
437
if (isinstance(error, OSError)
438
and error.errno != errno.ECHILD):
439
raise error
440
else:
441
if pid:
442
logger.warning(u"Checker was a zombie")
443
gobject.source_remove(self.checker_callback_tag)
444
self.checker_callback(pid, status,
445
self.current_checker_command)
446
# Start a new checker if needed
389
447
if self.checker is None:
390
448
try:
391
449
# In case checker_command has exactly one % operator
392
450
command = self.checker_command % self.host
393
451
except TypeError:
394
452
# Escape attributes for the shell
395
escaped_attrs = dict((key, re.escape(str(val)))
453
escaped_attrs = dict((key,
454
re.escape(unicode(str(val),
455
errors=
456
u'replace')))
396
457
for key, val in
397
458
vars(self).iteritems())
398
459
try:
401
462
logger.error(u'Could not format string "%s":'
402
463
u' %s', self.checker_command, error)
403
464
return True # Try again later
465
self.current_checker_command = command
404
466
try:
405
467
logger.info(u"Starting checker %r for %s",
406
468
command, self.name)
410
472
# always replaced by /dev/null.)
411
473
self.checker = subprocess.Popen(command,
412
474
close_fds=True,
413
shell=True, cwd="/")
414
# Emit D-Bus signal
415
self.CheckerStarted(command)
416
self.PropertyChanged(dbus.String("checker_running"),
417
dbus.Boolean(True, variant_level=1))
475
shell=True, cwd=u"/")
418
476
self.checker_callback_tag = (gobject.child_watch_add
419
477
(self.checker.pid,
420
478
self.checker_callback,
421
479
data=command))
480
# The checker may have completed before the gobject
481
# watch was added. Check for this.
482
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
483
if pid:
484
gobject.source_remove(self.checker_callback_tag)
485
self.checker_callback(pid, status, command)
422
486
except OSError, error:
423
487
logger.error(u"Failed to start subprocess: %s",
424
488
error)
430
494
if self.checker_callback_tag:
431
495
gobject.source_remove(self.checker_callback_tag)
432
496
self.checker_callback_tag = None
433
if getattr(self, "checker", None) is None:
497
if getattr(self, u"checker", None) is None:
434
498
return
435
499
logger.debug(u"Stopping checker for %(name)s", vars(self))
436
500
try:
437
501
os.kill(self.checker.pid, signal.SIGTERM)
438
#os.sleep(0.5)
502
#time.sleep(0.5)
439
503
#if self.checker.poll() is None:
440
504
# os.kill(self.checker.pid, signal.SIGKILL)
441
505
except OSError, error:
442
506
if error.errno != errno.ESRCH: # No such process
443
507
raise
444
508
self.checker = None
445
self.PropertyChanged(dbus.String(u"checker_running"),
509
510
def dbus_service_property(dbus_interface, signature=u"v",
511
access=u"readwrite", byte_arrays=False):
512
"""Decorators for marking methods of a DBusObjectWithProperties to
513
become properties on the D-Bus.
514
515
The decorated method will be called with no arguments by "Get"
516
and with one argument by "Set".
517
518
The parameters, where they are supported, are the same as
519
dbus.service.method, except there is only "signature", since the
520
type from Get() and the type sent to Set() is the same.
521
"""
522
# Encoding deeply encoded byte arrays is not supported yet by the
523
# "Set" method, so we fail early here:
524
if byte_arrays and signature != u"ay":
525
raise ValueError(u"Byte arrays not supported for non-'ay'"
526
u" signature %r" % signature)
527
def decorator(func):
528
func._dbus_is_property = True
529
func._dbus_interface = dbus_interface
530
func._dbus_signature = signature
531
func._dbus_access = access
532
func._dbus_name = func.__name__
533
if func._dbus_name.endswith(u"_dbus_property"):
534
func._dbus_name = func._dbus_name[:-14]
535
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
536
return func
537
return decorator
538
539
540
class DBusPropertyException(dbus.exceptions.DBusException):
541
"""A base class for D-Bus property-related exceptions
542
"""
543
def __unicode__(self):
544
return unicode(str(self))
545
546
547
class DBusPropertyAccessException(DBusPropertyException):
548
"""A property's access permissions disallows an operation.
549
"""
550
pass
551
552
553
class DBusPropertyNotFound(DBusPropertyException):
554
"""An attempt was made to access a non-existing property.
555
"""
556
pass
557
558
559
class DBusObjectWithProperties(dbus.service.Object):
560
"""A D-Bus object with properties.
561
562
Classes inheriting from this can use the dbus_service_property
563
decorator to expose methods as D-Bus properties. It exposes the
564
standard Get(), Set(), and GetAll() methods on the D-Bus.
565
"""
566
567
@staticmethod
568
def _is_dbus_property(obj):
569
return getattr(obj, u"_dbus_is_property", False)
570
571
def _get_all_dbus_properties(self):
572
"""Returns a generator of (name, attribute) pairs
573
"""
574
return ((prop._dbus_name, prop)
575
for name, prop in
576
inspect.getmembers(self, self._is_dbus_property))
577
578
def _get_dbus_property(self, interface_name, property_name):
579
"""Returns a bound method if one exists which is a D-Bus
580
property with the specified name and interface.
581
"""
582
for name in (property_name,
583
property_name + u"_dbus_property"):
584
prop = getattr(self, name, None)
585
if (prop is None
586
or not self._is_dbus_property(prop)
587
or prop._dbus_name != property_name
588
or (interface_name and prop._dbus_interface
589
and interface_name != prop._dbus_interface)):
590
continue
591
return prop
592
# No such property
593
raise DBusPropertyNotFound(self.dbus_object_path + u":"
594
+ interface_name + u"."
595
+ property_name)
596
597
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
598
out_signature=u"v")
599
def Get(self, interface_name, property_name):
600
"""Standard D-Bus property Get() method, see D-Bus standard.
601
"""
602
prop = self._get_dbus_property(interface_name, property_name)
603
if prop._dbus_access == u"write":
604
raise DBusPropertyAccessException(property_name)
605
value = prop()
606
if not hasattr(value, u"variant_level"):
607
return value
608
return type(value)(value, variant_level=value.variant_level+1)
609
610
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
611
def Set(self, interface_name, property_name, value):
612
"""Standard D-Bus property Set() method, see D-Bus standard.
613
"""
614
prop = self._get_dbus_property(interface_name, property_name)
615
if prop._dbus_access == u"read":
616
raise DBusPropertyAccessException(property_name)
617
if prop._dbus_get_args_options[u"byte_arrays"]:
618
# The byte_arrays option is not supported yet on
619
# signatures other than "ay".
620
if prop._dbus_signature != u"ay":
621
raise ValueError
622
value = dbus.ByteArray(''.join(unichr(byte)
623
for byte in value))
624
prop(value)
625
626
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
627
out_signature=u"a{sv}")
628
def GetAll(self, interface_name):
629
"""Standard D-Bus property GetAll() method, see D-Bus
630
standard.
631
632
Note: Will not include properties with access="write".
633
"""
634
all = {}
635
for name, prop in self._get_all_dbus_properties():
636
if (interface_name
637
and interface_name != prop._dbus_interface):
638
# Interface non-empty but did not match
639
continue
640
# Ignore write-only properties
641
if prop._dbus_access == u"write":
642
continue
643
value = prop()
644
if not hasattr(value, u"variant_level"):
645
all[name] = value
646
continue
647
all[name] = type(value)(value, variant_level=
648
value.variant_level+1)
649
return dbus.Dictionary(all, signature=u"sv")
650
651
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
652
out_signature=u"s",
653
path_keyword='object_path',
654
connection_keyword='connection')
655
def Introspect(self, object_path, connection):
656
"""Standard D-Bus method, overloaded to insert property tags.
657
"""
658
xmlstring = dbus.service.Object.Introspect(self, object_path,
659
connection)
660
try:
661
document = xml.dom.minidom.parseString(xmlstring)
662
def make_tag(document, name, prop):
663
e = document.createElement(u"property")
664
e.setAttribute(u"name", name)
665
e.setAttribute(u"type", prop._dbus_signature)
666
e.setAttribute(u"access", prop._dbus_access)
667
return e
668
for if_tag in document.getElementsByTagName(u"interface"):
669
for tag in (make_tag(document, name, prop)
670
for name, prop
671
in self._get_all_dbus_properties()
672
if prop._dbus_interface
673
== if_tag.getAttribute(u"name")):
674
if_tag.appendChild(tag)
675
# Add the names to the return values for the
676
# "org.freedesktop.DBus.Properties" methods
677
if (if_tag.getAttribute(u"name")
678
== u"org.freedesktop.DBus.Properties"):
679
for cn in if_tag.getElementsByTagName(u"method"):
680
if cn.getAttribute(u"name") == u"Get":
681
for arg in cn.getElementsByTagName(u"arg"):
682
if (arg.getAttribute(u"direction")
683
== u"out"):
684
arg.setAttribute(u"name", u"value")
685
elif cn.getAttribute(u"name") == u"GetAll":
686
for arg in cn.getElementsByTagName(u"arg"):
687
if (arg.getAttribute(u"direction")
688
== u"out"):
689
arg.setAttribute(u"name", u"props")
690
xmlstring = document.toxml(u"utf-8")
691
document.unlink()
692
except (AttributeError, xml.dom.DOMException,
693
xml.parsers.expat.ExpatError), error:
694
logger.error(u"Failed to override Introspection method",
695
error)
696
return xmlstring
697
698
699
class ClientDBus(Client, DBusObjectWithProperties):
700
"""A Client class using D-Bus
701
702
Attributes:
703
dbus_object_path: dbus.ObjectPath
704
bus: dbus.SystemBus()
705
"""
706
# dbus.service.Object doesn't use super(), so we can't either.
707
708
def __init__(self, bus = None, *args, **kwargs):
709
self._approvals_pending = 0
710
self.bus = bus
711
Client.__init__(self, *args, **kwargs)
712
# Only now, when this client is initialized, can it show up on
713
# the D-Bus
714
self.dbus_object_path = (dbus.ObjectPath
715
(u"/clients/"
716
+ self.name.replace(u".", u"_")))
717
DBusObjectWithProperties.__init__(self, self.bus,
718
self.dbus_object_path)
719
720
def _get_approvals_pending(self):
721
return self._approvals_pending
722
def _set_approvals_pending(self, value):
723
old_value = self._approvals_pending
724
self._approvals_pending = value
725
bval = bool(value)
726
if (hasattr(self, "dbus_object_path")
727
and bval is not bool(old_value)):
728
dbus_bool = dbus.Boolean(bval, variant_level=1)
729
self.PropertyChanged(dbus.String(u"ApprovalPending"),
730
dbus_bool)
731
732
approvals_pending = property(_get_approvals_pending,
733
_set_approvals_pending)
734
del _get_approvals_pending, _set_approvals_pending
735
736
@staticmethod
737
def _datetime_to_dbus(dt, variant_level=0):
738
"""Convert a UTC datetime.datetime() to a D-Bus type."""
739
return dbus.String(dt.isoformat(),
740
variant_level=variant_level)
741
742
def enable(self):
743
oldstate = getattr(self, u"enabled", False)
744
r = Client.enable(self)
745
if oldstate != self.enabled:
746
# Emit D-Bus signals
747
self.PropertyChanged(dbus.String(u"Enabled"),
748
dbus.Boolean(True, variant_level=1))
749
self.PropertyChanged(
750
dbus.String(u"LastEnabled"),
751
self._datetime_to_dbus(self.last_enabled,
752
variant_level=1))
753
return r
754
755
def disable(self, quiet = False):
756
oldstate = getattr(self, u"enabled", False)
757
r = Client.disable(self, quiet=quiet)
758
if not quiet and oldstate != self.enabled:
759
# Emit D-Bus signal
760
self.PropertyChanged(dbus.String(u"Enabled"),
761
dbus.Boolean(False, variant_level=1))
762
return r
763
764
def __del__(self, *args, **kwargs):
765
try:
766
self.remove_from_connection()
767
except LookupError:
768
pass
769
if hasattr(DBusObjectWithProperties, u"__del__"):
770
DBusObjectWithProperties.__del__(self, *args, **kwargs)
771
Client.__del__(self, *args, **kwargs)
772
773
def checker_callback(self, pid, condition, command,
774
*args, **kwargs):
775
self.checker_callback_tag = None
776
self.checker = None
777
# Emit D-Bus signal
778
self.PropertyChanged(dbus.String(u"CheckerRunning"),
446
779
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
459
_interface = u"org.mandos_system.Mandos.Client"
460
461
# BumpTimeout - method
462
BumpTimeout = dbus.service.method(_interface)(bump_timeout)
463
BumpTimeout.__name__ = "BumpTimeout"
780
if os.WIFEXITED(condition):
781
exitstatus = os.WEXITSTATUS(condition)
782
# Emit D-Bus signal
783
self.CheckerCompleted(dbus.Int16(exitstatus),
784
dbus.Int64(condition),
785
dbus.String(command))
786
else:
787
# Emit D-Bus signal
788
self.CheckerCompleted(dbus.Int16(-1),
789
dbus.Int64(condition),
790
dbus.String(command))
791
792
return Client.checker_callback(self, pid, condition, command,
793
*args, **kwargs)
794
795
def checked_ok(self, *args, **kwargs):
796
r = Client.checked_ok(self, *args, **kwargs)
797
# Emit D-Bus signal
798
self.PropertyChanged(
799
dbus.String(u"LastCheckedOK"),
800
(self._datetime_to_dbus(self.last_checked_ok,
801
variant_level=1)))
802
return r
803
804
def start_checker(self, *args, **kwargs):
805
old_checker = self.checker
806
if self.checker is not None:
807
old_checker_pid = self.checker.pid
808
else:
809
old_checker_pid = None
810
r = Client.start_checker(self, *args, **kwargs)
811
# Only if new checker process was started
812
if (self.checker is not None
813
and old_checker_pid != self.checker.pid):
814
# Emit D-Bus signal
815
self.CheckerStarted(self.current_checker_command)
816
self.PropertyChanged(
817
dbus.String(u"CheckerRunning"),
818
dbus.Boolean(True, variant_level=1))
819
return r
820
821
def stop_checker(self, *args, **kwargs):
822
old_checker = getattr(self, u"checker", None)
823
r = Client.stop_checker(self, *args, **kwargs)
824
if (old_checker is not None
825
and getattr(self, u"checker", None) is None):
826
self.PropertyChanged(dbus.String(u"CheckerRunning"),
827
dbus.Boolean(False, variant_level=1))
828
return r
829
830
def _reset_approved(self):
831
self._approved = None
832
return False
833
834
def approve(self, value=True):
835
self.send_changedstate()
836
self._approved = value
837
gobject.timeout_add(self._timedelta_to_milliseconds
838
(self.approval_duration),
839
self._reset_approved)
840
841
842
## D-Bus methods, signals & properties
843
_interface = u"se.bsnet.fukt.Mandos.Client"
844
845
## Signals
464
846
465
847
# CheckerCompleted - signal
466
@dbus.service.signal(_interface, signature="bqs")
467
def CheckerCompleted(self, success, condition, command):
848
@dbus.service.signal(_interface, signature=u"nxs")
849
def CheckerCompleted(self, exitcode, waitstatus, command):
468
850
"D-Bus signal"
469
851
pass
470
852
471
853
# CheckerStarted - signal
472
@dbus.service.signal(_interface, signature="s")
854
@dbus.service.signal(_interface, signature=u"s")
473
855
def CheckerStarted(self, command):
474
856
"D-Bus signal"
475
857
pass
476
858
477
# GetAllProperties - method
478
@dbus.service.method(_interface, out_signature="a{sv}")
479
def GetAllProperties(self):
480
"D-Bus method"
481
return dbus.Dictionary({
482
dbus.String("name"):
483
dbus.String(self.name, variant_level=1),
484
dbus.String("fingerprint"):
485
dbus.String(self.fingerprint, variant_level=1),
486
dbus.String("host"):
487
dbus.String(self.host, variant_level=1),
488
dbus.String("created"):
489
_datetime_to_dbus(self.created, variant_level=1),
490
dbus.String("last_enabled"):
491
(_datetime_to_dbus(self.last_enabled,
492
variant_level=1)
493
if self.last_enabled is not None
494
else dbus.Boolean(False, variant_level=1)),
495
dbus.String("enabled"):
496
dbus.Boolean(self.enabled, variant_level=1),
497
dbus.String("last_checked_ok"):
498
(_datetime_to_dbus(self.last_checked_ok,
499
variant_level=1)
500
if self.last_checked_ok is not None
501
else dbus.Boolean (False, variant_level=1)),
502
dbus.String("timeout"):
503
dbus.UInt64(self._timeout_milliseconds,
504
variant_level=1),
505
dbus.String("interval"):
506
dbus.UInt64(self._interval_milliseconds,
507
variant_level=1),
508
dbus.String("checker"):
509
dbus.String(self.checker_command,
510
variant_level=1),
511
dbus.String("checker_running"):
512
dbus.Boolean(self.checker is not None,
513
variant_level=1),
514
}, signature="sv")
515
516
# IsStillValid - method
517
IsStillValid = (dbus.service.method(_interface, out_signature="b")
518
(still_valid))
519
IsStillValid.__name__ = "IsStillValid"
520
521
859
# PropertyChanged - signal
522
@dbus.service.signal(_interface, signature="sv")
860
@dbus.service.signal(_interface, signature=u"sv")
523
861
def PropertyChanged(self, property, value):
524
862
"D-Bus signal"
525
863
pass
526
864
527
# SetChecker - method
528
@dbus.service.method(_interface, in_signature="s")
529
def SetChecker(self, checker):
530
"D-Bus setter method"
531
self.checker_command = checker
532
533
# SetHost - method
534
@dbus.service.method(_interface, in_signature="s")
535
def SetHost(self, host):
536
"D-Bus setter method"
537
self.host = host
538
539
# SetInterval - method
540
@dbus.service.method(_interface, in_signature="t")
541
def SetInterval(self, milliseconds):
542
self.interval = datetime.timdeelta(0, 0, 0, milliseconds)
543
544
# SetSecret - method
545
@dbus.service.method(_interface, in_signature="ay",
546
byte_arrays=True)
547
def SetSecret(self, secret):
548
"D-Bus setter method"
549
self.secret = str(secret)
550
551
# SetTimeout - method
552
@dbus.service.method(_interface, in_signature="t")
553
def SetTimeout(self, milliseconds):
554
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
865
# GotSecret - signal
866
@dbus.service.signal(_interface)
867
def GotSecret(self):
868
"""D-Bus signal
869
Is sent after a successful transfer of secret from the Mandos
870
server to mandos-client
871
"""
872
pass
873
874
# Rejected - signal
875
@dbus.service.signal(_interface, signature=u"s")
876
def Rejected(self, reason):
877
"D-Bus signal"
878
pass
879
880
# NeedApproval - signal
881
@dbus.service.signal(_interface, signature=u"tb")
882
def NeedApproval(self, timeout, default):
883
"D-Bus signal"
884
pass
885
886
## Methods
887
888
# Approve - method
889
@dbus.service.method(_interface, in_signature=u"b")
890
def Approve(self, value):
891
self.approve(value)
892
893
# CheckedOK - method
894
@dbus.service.method(_interface)
895
def CheckedOK(self):
896
return self.checked_ok()
555
897
556
898
# Enable - method
557
Enable = dbus.service.method(_interface)(enable)
558
Enable.__name__ = "Enable"
899
@dbus.service.method(_interface)
900
def Enable(self):
901
"D-Bus method"
902
self.enable()
559
903
560
904
# StartChecker - method
561
905
@dbus.service.method(_interface)
570
914
self.disable()
571
915
572
916
# StopChecker - method
573
StopChecker = dbus.service.method(_interface)(stop_checker)
574
StopChecker.__name__ = "StopChecker"
917
@dbus.service.method(_interface)
918
def StopChecker(self):
919
self.stop_checker()
920
921
## Properties
922
923
# ApprovalPending - property
924
@dbus_service_property(_interface, signature=u"b", access=u"read")
925
def ApprovalPending_dbus_property(self):
926
return dbus.Boolean(bool(self.approvals_pending))
927
928
# ApprovedByDefault - property
929
@dbus_service_property(_interface, signature=u"b",
930
access=u"readwrite")
931
def ApprovedByDefault_dbus_property(self, value=None):
932
if value is None: # get
933
return dbus.Boolean(self.approved_by_default)
934
self.approved_by_default = bool(value)
935
# Emit D-Bus signal
936
self.PropertyChanged(dbus.String(u"ApprovedByDefault"),
937
dbus.Boolean(value, variant_level=1))
938
939
# ApprovalDelay - property
940
@dbus_service_property(_interface, signature=u"t",
941
access=u"readwrite")
942
def ApprovalDelay_dbus_property(self, value=None):
943
if value is None: # get
944
return dbus.UInt64(self.approval_delay_milliseconds())
945
self.approval_delay = datetime.timedelta(0, 0, 0, value)
946
# Emit D-Bus signal
947
self.PropertyChanged(dbus.String(u"ApprovalDelay"),
948
dbus.UInt64(value, variant_level=1))
949
950
# ApprovalDuration - property
951
@dbus_service_property(_interface, signature=u"t",
952
access=u"readwrite")
953
def ApprovalDuration_dbus_property(self, value=None):
954
if value is None: # get
955
return dbus.UInt64(self._timedelta_to_milliseconds(
956
self.approval_duration))
957
self.approval_duration = datetime.timedelta(0, 0, 0, value)
958
# Emit D-Bus signal
959
self.PropertyChanged(dbus.String(u"ApprovalDuration"),
960
dbus.UInt64(value, variant_level=1))
961
962
# Name - property
963
@dbus_service_property(_interface, signature=u"s", access=u"read")
964
def Name_dbus_property(self):
965
return dbus.String(self.name)
966
967
# Fingerprint - property
968
@dbus_service_property(_interface, signature=u"s", access=u"read")
969
def Fingerprint_dbus_property(self):
970
return dbus.String(self.fingerprint)
971
972
# Host - property
973
@dbus_service_property(_interface, signature=u"s",
974
access=u"readwrite")
975
def Host_dbus_property(self, value=None):
976
if value is None: # get
977
return dbus.String(self.host)
978
self.host = value
979
# Emit D-Bus signal
980
self.PropertyChanged(dbus.String(u"Host"),
981
dbus.String(value, variant_level=1))
982
983
# Created - property
984
@dbus_service_property(_interface, signature=u"s", access=u"read")
985
def Created_dbus_property(self):
986
return dbus.String(self._datetime_to_dbus(self.created))
987
988
# LastEnabled - property
989
@dbus_service_property(_interface, signature=u"s", access=u"read")
990
def LastEnabled_dbus_property(self):
991
if self.last_enabled is None:
992
return dbus.String(u"")
993
return dbus.String(self._datetime_to_dbus(self.last_enabled))
994
995
# Enabled - property
996
@dbus_service_property(_interface, signature=u"b",
997
access=u"readwrite")
998
def Enabled_dbus_property(self, value=None):
999
if value is None: # get
1000
return dbus.Boolean(self.enabled)
1001
if value:
1002
self.enable()
1003
else:
1004
self.disable()
1005
1006
# LastCheckedOK - property
1007
@dbus_service_property(_interface, signature=u"s",
1008
access=u"readwrite")
1009
def LastCheckedOK_dbus_property(self, value=None):
1010
if value is not None:
1011
self.checked_ok()
1012
return
1013
if self.last_checked_ok is None:
1014
return dbus.String(u"")
1015
return dbus.String(self._datetime_to_dbus(self
1016
.last_checked_ok))
1017
1018
# Timeout - property
1019
@dbus_service_property(_interface, signature=u"t",
1020
access=u"readwrite")
1021
def Timeout_dbus_property(self, value=None):
1022
if value is None: # get
1023
return dbus.UInt64(self.timeout_milliseconds())
1024
self.timeout = datetime.timedelta(0, 0, 0, value)
1025
# Emit D-Bus signal
1026
self.PropertyChanged(dbus.String(u"Timeout"),
1027
dbus.UInt64(value, variant_level=1))
1028
if getattr(self, u"disable_initiator_tag", None) is None:
1029
return
1030
# Reschedule timeout
1031
gobject.source_remove(self.disable_initiator_tag)
1032
self.disable_initiator_tag = None
1033
time_to_die = (self.
1034
_timedelta_to_milliseconds((self
1035
.last_checked_ok
1036
+ self.timeout)
1037
- datetime.datetime
1038
.utcnow()))
1039
if time_to_die <= 0:
1040
# The timeout has passed
1041
self.disable()
1042
else:
1043
self.disable_initiator_tag = (gobject.timeout_add
1044
(time_to_die, self.disable))
1045
1046
# Interval - property
1047
@dbus_service_property(_interface, signature=u"t",
1048
access=u"readwrite")
1049
def Interval_dbus_property(self, value=None):
1050
if value is None: # get
1051
return dbus.UInt64(self.interval_milliseconds())
1052
self.interval = datetime.timedelta(0, 0, 0, value)
1053
# Emit D-Bus signal
1054
self.PropertyChanged(dbus.String(u"Interval"),
1055
dbus.UInt64(value, variant_level=1))
1056
if getattr(self, u"checker_initiator_tag", None) is None:
1057
return
1058
# Reschedule checker run
1059
gobject.source_remove(self.checker_initiator_tag)
1060
self.checker_initiator_tag = (gobject.timeout_add
1061
(value, self.start_checker))
1062
self.start_checker() # Start one now, too
1063
1064
# Checker - property
1065
@dbus_service_property(_interface, signature=u"s",
1066
access=u"readwrite")
1067
def Checker_dbus_property(self, value=None):
1068
if value is None: # get
1069
return dbus.String(self.checker_command)
1070
self.checker_command = value
1071
# Emit D-Bus signal
1072
self.PropertyChanged(dbus.String(u"Checker"),
1073
dbus.String(self.checker_command,
1074
variant_level=1))
1075
1076
# CheckerRunning - property
1077
@dbus_service_property(_interface, signature=u"b",
1078
access=u"readwrite")
1079
def CheckerRunning_dbus_property(self, value=None):
1080
if value is None: # get
1081
return dbus.Boolean(self.checker is not None)
1082
if value:
1083
self.start_checker()
1084
else:
1085
self.stop_checker()
1086
1087
# ObjectPath - property
1088
@dbus_service_property(_interface, signature=u"o", access=u"read")
1089
def ObjectPath_dbus_property(self):
1090
return self.dbus_object_path # is already a dbus.ObjectPath
1091
1092
# Secret = property
1093
@dbus_service_property(_interface, signature=u"ay",
1094
access=u"write", byte_arrays=True)
1095
def Secret_dbus_property(self, value):
1096
self.secret = str(value)
575
1097
576
1098
del _interface
577
1099
578
1100
579
def peer_certificate(session):
580
"Return the peer's OpenPGP certificate as a bytestring"
581
# If not an OpenPGP certificate...
582
if (gnutls.library.functions
583
.gnutls_certificate_type_get(session._c_object)
584
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
585
# ...do the normal thing
586
return session.peer_certificate
587
list_size = ctypes.c_uint()
588
cert_list = (gnutls.library.functions
589
.gnutls_certificate_get_peers
590
(session._c_object, ctypes.byref(list_size)))
591
if list_size.value == 0:
592
return None
593
cert = cert_list[0]
594
return ctypes.string_at(cert.data, cert.size)
595
596
597
def fingerprint(openpgp):
598
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
599
# New GnuTLS "datum" with the OpenPGP public key
600
datum = (gnutls.library.types
601
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
602
ctypes.POINTER
603
(ctypes.c_ubyte)),
604
ctypes.c_uint(len(openpgp))))
605
# New empty GnuTLS certificate
606
crt = gnutls.library.types.gnutls_openpgp_crt_t()
607
(gnutls.library.functions
608
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
609
# Import the OpenPGP public key into the certificate
610
(gnutls.library.functions
611
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
612
gnutls.library.constants
613
.GNUTLS_OPENPGP_FMT_RAW))
614
# Verify the self signature in the key
615
crtverify = ctypes.c_uint()
616
(gnutls.library.functions
617
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
618
if crtverify.value != 0:
619
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
620
raise gnutls.errors.CertificateSecurityError("Verify failed")
621
# New buffer for the fingerprint
622
buf = ctypes.create_string_buffer(20)
623
buf_len = ctypes.c_size_t()
624
# Get the fingerprint from the certificate into the buffer
625
(gnutls.library.functions
626
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
627
ctypes.byref(buf_len)))
628
# Deinit the certificate
629
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
630
# Convert the buffer to a Python bytestring
631
fpr = ctypes.string_at(buf, buf_len.value)
632
# Convert the bytestring to hexadecimal notation
633
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
634
return hex_fpr
635
636
637
class TCP_handler(SocketServer.BaseRequestHandler, object):
638
"""A TCP request handler class.
639
Instantiated by IPv6_TCPServer for each request to handle it.
1101
class ProxyClient(object):
1102
def __init__(self, child_pipe, fpr, address):
1103
self._pipe = child_pipe
1104
self._pipe.send(('init', fpr, address))
1105
if not self._pipe.recv():
1106
raise KeyError()
1107
1108
def __getattribute__(self, name):
1109
if(name == '_pipe'):
1110
return super(ProxyClient, self).__getattribute__(name)
1111
self._pipe.send(('getattr', name))
1112
data = self._pipe.recv()
1113
if data[0] == 'data':
1114
return data[1]
1115
if data[0] == 'function':
1116
def func(*args, **kwargs):
1117
self._pipe.send(('funcall', name, args, kwargs))
1118
return self._pipe.recv()[1]
1119
return func
1120
1121
def __setattr__(self, name, value):
1122
if(name == '_pipe'):
1123
return super(ProxyClient, self).__setattr__(name, value)
1124
self._pipe.send(('setattr', name, value))
1125
1126
1127
class ClientHandler(socketserver.BaseRequestHandler, object):
1128
"""A class to handle client connections.
1129
1130
Instantiated once for each connection to handle it.
640
1131
Note: This will run in its own forked process."""
641
1132
642
1133
def handle(self):
643
logger.info(u"TCP connection from: %s",
644
unicode(self.client_address))
645
session = (gnutls.connection
646
.ClientSession(self.request,
647
gnutls.connection
648
.X509Credentials()))
649
650
line = self.request.makefile().readline()
651
logger.debug(u"Protocol version: %r", line)
652
try:
653
if int(line.strip().split()[0]) > 1:
654
raise RuntimeError
655
except (ValueError, IndexError, RuntimeError), error:
656
logger.error(u"Unknown protocol version: %s", error)
657
return
658
659
# Note: gnutls.connection.X509Credentials is really a generic
660
# GnuTLS certificate credentials object so long as no X.509
661
# keys are added to it. Therefore, we can use it here despite
662
# using OpenPGP certificates.
663
664
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
665
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
666
# "+DHE-DSS"))
667
# Use a fallback default, since this MUST be set.
668
priority = self.server.settings.get("priority", "NORMAL")
669
(gnutls.library.functions
670
.gnutls_priority_set_direct(session._c_object,
671
priority, None))
672
673
try:
674
session.handshake()
675
except gnutls.errors.GNUTLSError, error:
676
logger.warning(u"Handshake failed: %s", error)
677
# Do not run session.bye() here: the session is not
678
# established. Just abandon the request.
679
return
680
try:
681
fpr = fingerprint(peer_certificate(session))
682
except (TypeError, gnutls.errors.GNUTLSError), error:
683
logger.warning(u"Bad certificate: %s", error)
684
session.bye()
685
return
686
logger.debug(u"Fingerprint: %s", fpr)
687
for c in self.server.clients:
688
if c.fingerprint == fpr:
689
client = c
690
break
691
else:
692
logger.warning(u"Client not found for fingerprint: %s",
693
fpr)
694
session.bye()
695
return
696
# Have to check if client.still_valid(), since it is possible
697
# that the client timed out while establishing the GnuTLS
698
# session.
699
if not client.still_valid():
700
logger.warning(u"Client %(name)s is invalid",
701
vars(client))
702
session.bye()
703
return
704
## This won't work here, since we're in a fork.
705
# client.bump_timeout()
706
sent_size = 0
707
while sent_size < len(client.secret):
708
sent = session.send(client.secret[sent_size:])
709
logger.debug(u"Sent: %d, remaining: %d",
710
sent, len(client.secret)
711
- (sent_size + sent))
712
sent_size += sent
713
session.bye()
714
715
716
class IPv6_TCPServer(SocketServer.ForkingMixIn,
717
SocketServer.TCPServer, object):
718
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1134
with contextlib.closing(self.server.child_pipe) as child_pipe:
1135
logger.info(u"TCP connection from: %s",
1136
unicode(self.client_address))
1137
logger.debug(u"Pipe FD: %d",
1138
self.server.child_pipe.fileno())
1139
1140
session = (gnutls.connection
1141
.ClientSession(self.request,
1142
gnutls.connection
1143
.X509Credentials()))
1144
1145
# Note: gnutls.connection.X509Credentials is really a
1146
# generic GnuTLS certificate credentials object so long as
1147
# no X.509 keys are added to it. Therefore, we can use it
1148
# here despite using OpenPGP certificates.
1149
1150
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1151
# u"+AES-256-CBC", u"+SHA1",
1152
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1153
# u"+DHE-DSS"))
1154
# Use a fallback default, since this MUST be set.
1155
priority = self.server.gnutls_priority
1156
if priority is None:
1157
priority = u"NORMAL"
1158
(gnutls.library.functions
1159
.gnutls_priority_set_direct(session._c_object,
1160
priority, None))
1161
1162
# Start communication using the Mandos protocol
1163
# Get protocol number
1164
line = self.request.makefile().readline()
1165
logger.debug(u"Protocol version: %r", line)
1166
try:
1167
if int(line.strip().split()[0]) > 1:
1168
raise RuntimeError
1169
except (ValueError, IndexError, RuntimeError), error:
1170
logger.error(u"Unknown protocol version: %s", error)
1171
return
1172
1173
# Start GnuTLS connection
1174
try:
1175
session.handshake()
1176
except gnutls.errors.GNUTLSError, error:
1177
logger.warning(u"Handshake failed: %s", error)
1178
# Do not run session.bye() here: the session is not
1179
# established. Just abandon the request.
1180
return
1181
logger.debug(u"Handshake succeeded")
1182
1183
approval_required = False
1184
try:
1185
try:
1186
fpr = self.fingerprint(self.peer_certificate
1187
(session))
1188
except (TypeError, gnutls.errors.GNUTLSError), error:
1189
logger.warning(u"Bad certificate: %s", error)
1190
return
1191
logger.debug(u"Fingerprint: %s", fpr)
1192
1193
try:
1194
client = ProxyClient(child_pipe, fpr,
1195
self.client_address)
1196
except KeyError:
1197
return
1198
1199
if client.approval_delay:
1200
delay = client.approval_delay
1201
client.approvals_pending += 1
1202
approval_required = True
1203
1204
while True:
1205
if not client.enabled:
1206
logger.warning(u"Client %s is disabled",
1207
client.name)
1208
if self.server.use_dbus:
1209
# Emit D-Bus signal
1210
client.Rejected("Disabled")
1211
return
1212
1213
if client._approved or not client.approval_delay:
1214
#We are approved or approval is disabled
1215
break
1216
elif client._approved is None:
1217
logger.info(u"Client %s needs approval",
1218
client.name)
1219
if self.server.use_dbus:
1220
# Emit D-Bus signal
1221
client.NeedApproval(
1222
client.approval_delay_milliseconds(),
1223
client.approved_by_default)
1224
else:
1225
logger.warning(u"Client %s was not approved",
1226
client.name)
1227
if self.server.use_dbus:
1228
# Emit D-Bus signal
1229
client.Rejected("Denied")
1230
return
1231
1232
#wait until timeout or approved
1233
#x = float(client._timedelta_to_milliseconds(delay))
1234
time = datetime.datetime.now()
1235
client.changedstate.acquire()
1236
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1237
client.changedstate.release()
1238
time2 = datetime.datetime.now()
1239
if (time2 - time) >= delay:
1240
if not client.approved_by_default:
1241
logger.warning("Client %s timed out while"
1242
" waiting for approval",
1243
client.name)
1244
if self.server.use_dbus:
1245
# Emit D-Bus signal
1246
client.Rejected("Approval timed out")
1247
return
1248
else:
1249
break
1250
else:
1251
delay -= time2 - time
1252
1253
sent_size = 0
1254
while sent_size < len(client.secret):
1255
try:
1256
sent = session.send(client.secret[sent_size:])
1257
except (gnutls.errors.GNUTLSError), error:
1258
logger.warning("gnutls send failed")
1259
return
1260
logger.debug(u"Sent: %d, remaining: %d",
1261
sent, len(client.secret)
1262
- (sent_size + sent))
1263
sent_size += sent
1264
1265
logger.info(u"Sending secret to %s", client.name)
1266
# bump the timeout as if seen
1267
client.checked_ok()
1268
if self.server.use_dbus:
1269
# Emit D-Bus signal
1270
client.GotSecret()
1271
1272
finally:
1273
if approval_required:
1274
client.approvals_pending -= 1
1275
try:
1276
session.bye()
1277
except (gnutls.errors.GNUTLSError), error:
1278
logger.warning("GnuTLS bye failed")
1279
1280
@staticmethod
1281
def peer_certificate(session):
1282
"Return the peer's OpenPGP certificate as a bytestring"
1283
# If not an OpenPGP certificate...
1284
if (gnutls.library.functions
1285
.gnutls_certificate_type_get(session._c_object)
1286
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1287
# ...do the normal thing
1288
return session.peer_certificate
1289
list_size = ctypes.c_uint(1)
1290
cert_list = (gnutls.library.functions
1291
.gnutls_certificate_get_peers
1292
(session._c_object, ctypes.byref(list_size)))
1293
if not bool(cert_list) and list_size.value != 0:
1294
raise gnutls.errors.GNUTLSError(u"error getting peer"
1295
u" certificate")
1296
if list_size.value == 0:
1297
return None
1298
cert = cert_list[0]
1299
return ctypes.string_at(cert.data, cert.size)
1300
1301
@staticmethod
1302
def fingerprint(openpgp):
1303
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1304
# New GnuTLS "datum" with the OpenPGP public key
1305
datum = (gnutls.library.types
1306
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1307
ctypes.POINTER
1308
(ctypes.c_ubyte)),
1309
ctypes.c_uint(len(openpgp))))
1310
# New empty GnuTLS certificate
1311
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1312
(gnutls.library.functions
1313
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1314
# Import the OpenPGP public key into the certificate
1315
(gnutls.library.functions
1316
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1317
gnutls.library.constants
1318
.GNUTLS_OPENPGP_FMT_RAW))
1319
# Verify the self signature in the key
1320
crtverify = ctypes.c_uint()
1321
(gnutls.library.functions
1322
.gnutls_openpgp_crt_verify_self(crt, 0,
1323
ctypes.byref(crtverify)))
1324
if crtverify.value != 0:
1325
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1326
raise (gnutls.errors.CertificateSecurityError
1327
(u"Verify failed"))
1328
# New buffer for the fingerprint
1329
buf = ctypes.create_string_buffer(20)
1330
buf_len = ctypes.c_size_t()
1331
# Get the fingerprint from the certificate into the buffer
1332
(gnutls.library.functions
1333
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1334
ctypes.byref(buf_len)))
1335
# Deinit the certificate
1336
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1337
# Convert the buffer to a Python bytestring
1338
fpr = ctypes.string_at(buf, buf_len.value)
1339
# Convert the bytestring to hexadecimal notation
1340
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1341
return hex_fpr
1342
1343
1344
class MultiprocessingMixIn(object):
1345
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1346
def sub_process_main(self, request, address):
1347
try:
1348
self.finish_request(request, address)
1349
except:
1350
self.handle_error(request, address)
1351
self.close_request(request)
1352
1353
def process_request(self, request, address):
1354
"""Start a new process to process the request."""
1355
multiprocessing.Process(target = self.sub_process_main,
1356
args = (request, address)).start()
1357
1358
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1359
""" adds a pipe to the MixIn """
1360
def process_request(self, request, client_address):
1361
"""Overrides and wraps the original process_request().
1362
1363
This function creates a new pipe in self.pipe
1364
"""
1365
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1366
1367
super(MultiprocessingMixInWithPipe,
1368
self).process_request(request, client_address)
1369
self.child_pipe.close()
1370
self.add_pipe(parent_pipe)
1371
1372
def add_pipe(self, parent_pipe):
1373
"""Dummy function; override as necessary"""
1374
pass
1375
1376
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1377
socketserver.TCPServer, object):
1378
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1379
719
1380
Attributes:
720
settings: Server settings
721
clients: Set() of Client objects
722
1381
enabled: Boolean; whether this server is activated yet
1382
interface: None or a network interface name (string)
1383
use_ipv6: Boolean; to use IPv6 or not
723
1384
"""
724
address_family = socket.AF_INET6
725
def __init__(self, *args, **kwargs):
726
if "settings" in kwargs:
727
self.settings = kwargs["settings"]
728
del kwargs["settings"]
729
if "clients" in kwargs:
730
self.clients = kwargs["clients"]
731
del kwargs["clients"]
732
self.enabled = False
733
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1385
def __init__(self, server_address, RequestHandlerClass,
1386
interface=None, use_ipv6=True):
1387
self.interface = interface
1388
if use_ipv6:
1389
self.address_family = socket.AF_INET6
1390
socketserver.TCPServer.__init__(self, server_address,
1391
RequestHandlerClass)
734
1392
def server_bind(self):
735
1393
"""This overrides the normal server_bind() function
736
1394
to bind to an interface if one was specified, and also NOT to
737
1395
bind to an address or port if they were not specified."""
738
if self.settings["interface"]:
739
# 25 is from /usr/include/asm-i486/socket.h
740
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
741
try:
742
self.socket.setsockopt(socket.SOL_SOCKET,
743
SO_BINDTODEVICE,
744
self.settings["interface"])
745
except socket.error, error:
746
if error[0] == errno.EPERM:
747
logger.error(u"No permission to"
748
u" bind to interface %s",
749
self.settings["interface"])
750
else:
751
raise error
1396
if self.interface is not None:
1397
if SO_BINDTODEVICE is None:
1398
logger.error(u"SO_BINDTODEVICE does not exist;"
1399
u" cannot bind to interface %s",
1400
self.interface)
1401
else:
1402
try:
1403
self.socket.setsockopt(socket.SOL_SOCKET,
1404
SO_BINDTODEVICE,
1405
str(self.interface
1406
+ u'\0'))
1407
except socket.error, error:
1408
if error[0] == errno.EPERM:
1409
logger.error(u"No permission to"
1410
u" bind to interface %s",
1411
self.interface)
1412
elif error[0] == errno.ENOPROTOOPT:
1413
logger.error(u"SO_BINDTODEVICE not available;"
1414
u" cannot bind to interface %s",
1415
self.interface)
1416
else:
1417
raise
752
1418
# Only bind(2) the socket if we really need to.
753
1419
if self.server_address[0] or self.server_address[1]:
754
1420
if not self.server_address[0]:
755
in6addr_any = "::"
756
self.server_address = (in6addr_any,
1421
if self.address_family == socket.AF_INET6:
1422
any_address = u"::" # in6addr_any
1423
else:
1424
any_address = socket.INADDR_ANY
1425
self.server_address = (any_address,
757
1426
self.server_address[1])
758
1427
elif not self.server_address[1]:
759
1428
self.server_address = (self.server_address[0],
760
1429
0)
761
# if self.settings["interface"]:
1430
# if self.interface:
762
1431
# self.server_address = (self.server_address[0],
763
1432
# 0, # port
764
1433
# 0, # flowinfo
765
1434
# if_nametoindex
766
# (self.settings
767
# ["interface"]))
768
return super(IPv6_TCPServer, self).server_bind()
1435
# (self.interface))
1436
return socketserver.TCPServer.server_bind(self)
1437
1438
1439
class MandosServer(IPv6_TCPServer):
1440
"""Mandos server.
1441
1442
Attributes:
1443
clients: set of Client objects
1444
gnutls_priority GnuTLS priority string
1445
use_dbus: Boolean; to emit D-Bus signals or not
1446
1447
Assumes a gobject.MainLoop event loop.
1448
"""
1449
def __init__(self, server_address, RequestHandlerClass,
1450
interface=None, use_ipv6=True, clients=None,
1451
gnutls_priority=None, use_dbus=True):
1452
self.enabled = False
1453
self.clients = clients
1454
if self.clients is None:
1455
self.clients = set()
1456
self.use_dbus = use_dbus
1457
self.gnutls_priority = gnutls_priority
1458
IPv6_TCPServer.__init__(self, server_address,
1459
RequestHandlerClass,
1460
interface = interface,
1461
use_ipv6 = use_ipv6)
769
1462
def server_activate(self):
770
1463
if self.enabled:
771
return super(IPv6_TCPServer, self).server_activate()
1464
return socketserver.TCPServer.server_activate(self)
772
1465
def enable(self):
773
1466
self.enabled = True
1467
def add_pipe(self, parent_pipe):
1468
# Call "handle_ipc" for both data and EOF events
1469
gobject.io_add_watch(parent_pipe.fileno(),
1470
gobject.IO_IN | gobject.IO_HUP,
1471
functools.partial(self.handle_ipc,
1472
parent_pipe = parent_pipe))
1473
1474
def handle_ipc(self, source, condition, parent_pipe=None,
1475
client_object=None):
1476
condition_names = {
1477
gobject.IO_IN: u"IN", # There is data to read.
1478
gobject.IO_OUT: u"OUT", # Data can be written (without
1479
# blocking).
1480
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1481
gobject.IO_ERR: u"ERR", # Error condition.
1482
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1483
# broken, usually for pipes and
1484
# sockets).
1485
}
1486
conditions_string = ' | '.join(name
1487
for cond, name in
1488
condition_names.iteritems()
1489
if cond & condition)
1490
# error or the other end of multiprocessing.Pipe has closed
1491
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1492
return False
1493
1494
# Read a request from the child
1495
request = parent_pipe.recv()
1496
command = request[0]
1497
1498
if command == 'init':
1499
fpr = request[1]
1500
address = request[2]
1501
1502
for c in self.clients:
1503
if c.fingerprint == fpr:
1504
client = c
1505
break
1506
else:
1507
logger.warning(u"Client not found for fingerprint: %s, ad"
1508
u"dress: %s", fpr, address)
1509
if self.use_dbus:
1510
# Emit D-Bus signal
1511
mandos_dbus_service.ClientNotFound(fpr, address)
1512
parent_pipe.send(False)
1513
return False
1514
1515
gobject.io_add_watch(parent_pipe.fileno(),
1516
gobject.IO_IN | gobject.IO_HUP,
1517
functools.partial(self.handle_ipc,
1518
parent_pipe = parent_pipe,
1519
client_object = client))
1520
parent_pipe.send(True)
1521
# remove the old hook in favor of the new above hook on same fileno
1522
return False
1523
if command == 'funcall':
1524
funcname = request[1]
1525
args = request[2]
1526
kwargs = request[3]
1527
1528
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1529
1530
if command == 'getattr':
1531
attrname = request[1]
1532
if callable(client_object.__getattribute__(attrname)):
1533
parent_pipe.send(('function',))
1534
else:
1535
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1536
1537
if command == 'setattr':
1538
attrname = request[1]
1539
value = request[2]
1540
setattr(client_object, attrname, value)
1541
1542
return True
774
1543
775
1544
776
1545
def string_to_delta(interval):
777
1546
"""Parse a string and return a datetime.timedelta
778
779
>>> string_to_delta('7d')
1547
1548
>>> string_to_delta(u'7d')
780
1549
datetime.timedelta(7)
781
>>> string_to_delta('60s')
1550
>>> string_to_delta(u'60s')
782
1551
datetime.timedelta(0, 60)
783
>>> string_to_delta('60m')
1552
>>> string_to_delta(u'60m')
784
1553
datetime.timedelta(0, 3600)
785
>>> string_to_delta('24h')
1554
>>> string_to_delta(u'24h')
786
1555
datetime.timedelta(1)
787
1556
>>> string_to_delta(u'1w')
788
1557
datetime.timedelta(7)
789
>>> string_to_delta('5m 30s')
1558
>>> string_to_delta(u'5m 30s')
790
1559
datetime.timedelta(0, 330)
791
1560
"""
792
1561
timevalue = datetime.timedelta(0)
805
1574
elif suffix == u"w":
806
1575
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
807
1576
else:
808
raise ValueError
809
except (ValueError, IndexError):
810
raise ValueError
1577
raise ValueError(u"Unknown suffix %r" % suffix)
1578
except (ValueError, IndexError), e:
1579
raise ValueError(e.message)
811
1580
timevalue += delta
812
1581
return timevalue
813
1582
814
1583
815
def server_state_changed(state):
816
"""Derived from the Avahi example code"""
817
if state == avahi.SERVER_COLLISION:
818
logger.error(u"Zeroconf server name collision")
819
service.remove()
820
elif state == avahi.SERVER_RUNNING:
821
service.add()
822
823
824
def entry_group_state_changed(state, error):
825
"""Derived from the Avahi example code"""
826
logger.debug(u"Avahi state change: %i", state)
827
828
if state == avahi.ENTRY_GROUP_ESTABLISHED:
829
logger.debug(u"Zeroconf service established.")
830
elif state == avahi.ENTRY_GROUP_COLLISION:
831
logger.warning(u"Zeroconf service name collision.")
832
service.rename()
833
elif state == avahi.ENTRY_GROUP_FAILURE:
834
logger.critical(u"Avahi: Error in group state changed %s",
835
unicode(error))
836
raise AvahiGroupError("State changed: %s", str(error))
837
838
1584
def if_nametoindex(interface):
839
"""Call the C function if_nametoindex(), or equivalent"""
1585
"""Call the C function if_nametoindex(), or equivalent
1586
1587
Note: This function cannot accept a unicode string."""
840
1588
global if_nametoindex
841
1589
try:
842
1590
if_nametoindex = (ctypes.cdll.LoadLibrary
843
(ctypes.util.find_library("c"))
1591
(ctypes.util.find_library(u"c"))
844
1592
.if_nametoindex)
845
1593
except (OSError, AttributeError):
846
if "struct" not in sys.modules:
847
import struct
848
if "fcntl" not in sys.modules:
849
import fcntl
1594
logger.warning(u"Doing if_nametoindex the hard way")
850
1595
def if_nametoindex(interface):
851
1596
"Get an interface index the hard way, i.e. using fcntl()"
852
1597
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
853
with closing(socket.socket()) as s:
1598
with contextlib.closing(socket.socket()) as s:
854
1599
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
855
struct.pack("16s16x", interface))
856
interface_index = struct.unpack("I", ifreq[16:20])[0]
1600
struct.pack(str(u"16s16x"),
1601
interface))
1602
interface_index = struct.unpack(str(u"I"),
1603
ifreq[16:20])[0]
857
1604
return interface_index
858
1605
return if_nametoindex(interface)
859
1606
860
1607
861
1608
def daemon(nochdir = False, noclose = False):
862
1609
"""See daemon(3). Standard BSD Unix function.
1610
863
1611
This should really exist as os.daemon, but it doesn't (yet)."""
864
1612
if os.fork():
865
1613
sys.exit()
866
1614
os.setsid()
867
1615
if not nochdir:
868
os.chdir("/")
1616
os.chdir(u"/")
869
1617
if os.fork():
870
1618
sys.exit()
871
1619
if not noclose:
873
1621
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
874
1622
if not stat.S_ISCHR(os.fstat(null).st_mode):
875
1623
raise OSError(errno.ENODEV,
876
"/dev/null not a character device")
1624
u"%s not a character device"
1625
% os.path.devnull)
877
1626
os.dup2(null, sys.stdin.fileno())
878
1627
os.dup2(null, sys.stdout.fileno())
879
1628
os.dup2(null, sys.stderr.fileno())
882
1631
883
1632
884
1633
def main():
885
parser = OptionParser(version = "%%prog %s" % version)
886
parser.add_option("-i", "--interface", type="string",
887
metavar="IF", help="Bind to interface IF")
888
parser.add_option("-a", "--address", type="string",
889
help="Address to listen for requests on")
890
parser.add_option("-p", "--port", type="int",
891
help="Port number to receive requests on")
892
parser.add_option("--check", action="store_true", default=False,
893
help="Run self-test")
894
parser.add_option("--debug", action="store_true",
895
help="Debug mode; run in foreground and log to"
896
" terminal")
897
parser.add_option("--priority", type="string", help="GnuTLS"
898
" priority string (see GnuTLS documentation)")
899
parser.add_option("--servicename", type="string", metavar="NAME",
900
help="Zeroconf service name")
901
parser.add_option("--configdir", type="string",
902
default="/etc/mandos", metavar="DIR",
903
help="Directory to search for configuration"
904
" files")
1634
1635
##################################################################
1636
# Parsing of options, both command line and config file
1637
1638
parser = optparse.OptionParser(version = "%%prog %s" % version)
1639
parser.add_option("-i", u"--interface", type=u"string",
1640
metavar="IF", help=u"Bind to interface IF")
1641
parser.add_option("-a", u"--address", type=u"string",
1642
help=u"Address to listen for requests on")
1643
parser.add_option("-p", u"--port", type=u"int",
1644
help=u"Port number to receive requests on")
1645
parser.add_option("--check", action=u"store_true",
1646
help=u"Run self-test")
1647
parser.add_option("--debug", action=u"store_true",
1648
help=u"Debug mode; run in foreground and log to"
1649
u" terminal")
1650
parser.add_option("--debuglevel", type=u"string", metavar="Level",
1651
help=u"Debug level for stdout output")
1652
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1653
u" priority string (see GnuTLS documentation)")
1654
parser.add_option("--servicename", type=u"string",
1655
metavar=u"NAME", help=u"Zeroconf service name")
1656
parser.add_option("--configdir", type=u"string",
1657
default=u"/etc/mandos", metavar=u"DIR",
1658
help=u"Directory to search for configuration"
1659
u" files")
1660
parser.add_option("--no-dbus", action=u"store_false",
1661
dest=u"use_dbus", help=u"Do not provide D-Bus"
1662
u" system bus interface")
1663
parser.add_option("--no-ipv6", action=u"store_false",
1664
dest=u"use_ipv6", help=u"Do not use IPv6")
905
1665
options = parser.parse_args()[0]
906
1666
907
1667
if options.check:
910
1670
sys.exit()
911
1671
912
1672
# Default values for config file for server-global settings
913
server_defaults = { "interface": "",
914
"address": "",
915
"port": "",
916
"debug": "False",
917
"priority":
918
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
919
"servicename": "Mandos",
1673
server_defaults = { u"interface": u"",
1674
u"address": u"",
1675
u"port": u"",
1676
u"debug": u"False",
1677
u"priority":
1678
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1679
u"servicename": u"Mandos",
1680
u"use_dbus": u"True",
1681
u"use_ipv6": u"True",
1682
u"debuglevel": u"",
920
1683
}
921
1684
922
1685
# Parse config file for server-global settings
923
server_config = ConfigParser.SafeConfigParser(server_defaults)
1686
server_config = configparser.SafeConfigParser(server_defaults)
924
1687
del server_defaults
925
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1688
server_config.read(os.path.join(options.configdir,
1689
u"mandos.conf"))
926
1690
# Convert the SafeConfigParser object to a dict
927
1691
server_settings = server_config.defaults()
928
# Use getboolean on the boolean config option
929
server_settings["debug"] = (server_config.getboolean
930
("DEFAULT", "debug"))
1692
# Use the appropriate methods on the non-string config options
1693
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1694
server_settings[option] = server_config.getboolean(u"DEFAULT",
1695
option)
1696
if server_settings["port"]:
1697
server_settings["port"] = server_config.getint(u"DEFAULT",
1698
u"port")
931
1699
del server_config
932
1700
933
1701
# Override the settings from the config file with command line
934
1702
# options, if set.
935
for option in ("interface", "address", "port", "debug",
936
"priority", "servicename", "configdir"):
1703
for option in (u"interface", u"address", u"port", u"debug",
1704
u"priority", u"servicename", u"configdir",
1705
u"use_dbus", u"use_ipv6", u"debuglevel"):
937
1706
value = getattr(options, option)
938
1707
if value is not None:
939
1708
server_settings[option] = value
940
1709
del options
1710
# Force all strings to be unicode
1711
for option in server_settings.keys():
1712
if type(server_settings[option]) is str:
1713
server_settings[option] = unicode(server_settings[option])
941
1714
# Now we have our good server settings in "server_settings"
942
1715
943
debug = server_settings["debug"]
944
945
if not debug:
946
syslogger.setLevel(logging.WARNING)
947
console.setLevel(logging.WARNING)
948
949
if server_settings["servicename"] != "Mandos":
1716
##################################################################
1717
1718
# For convenience
1719
debug = server_settings[u"debug"]
1720
debuglevel = server_settings[u"debuglevel"]
1721
use_dbus = server_settings[u"use_dbus"]
1722
use_ipv6 = server_settings[u"use_ipv6"]
1723
1724
if server_settings[u"servicename"] != u"Mandos":
950
1725
syslogger.setFormatter(logging.Formatter
951
('Mandos (%s): %%(levelname)s:'
952
' %%(message)s'
953
% server_settings["servicename"]))
1726
(u'Mandos (%s) [%%(process)d]:'
1727
u' %%(levelname)s: %%(message)s'
1728
% server_settings[u"servicename"]))
954
1729
955
1730
# Parse config file with clients
956
client_defaults = { "timeout": "1h",
957
"interval": "5m",
958
"checker": "fping -q -- %(host)s",
959
"host": "",
1731
client_defaults = { u"timeout": u"1h",
1732
u"interval": u"5m",
1733
u"checker": u"fping -q -- %%(host)s",
1734
u"host": u"",
1735
u"approval_delay": u"0s",
1736
u"approval_duration": u"1s",
960
1737
}
961
client_config = ConfigParser.SafeConfigParser(client_defaults)
962
client_config.read(os.path.join(server_settings["configdir"],
963
"clients.conf"))
964
965
clients = Set()
966
tcp_server = IPv6_TCPServer((server_settings["address"],
967
server_settings["port"]),
968
TCP_handler,
969
settings=server_settings,
970
clients=clients)
971
pidfilename = "/var/run/mandos.pid"
972
try:
973
pidfile = open(pidfilename, "w")
974
except IOError, error:
975
logger.error("Could not open file %r", pidfilename)
976
977
try:
978
uid = pwd.getpwnam("_mandos").pw_uid
1738
client_config = configparser.SafeConfigParser(client_defaults)
1739
client_config.read(os.path.join(server_settings[u"configdir"],
1740
u"clients.conf"))
1741
1742
global mandos_dbus_service
1743
mandos_dbus_service = None
1744
1745
tcp_server = MandosServer((server_settings[u"address"],
1746
server_settings[u"port"]),
1747
ClientHandler,
1748
interface=(server_settings[u"interface"]
1749
or None),
1750
use_ipv6=use_ipv6,
1751
gnutls_priority=
1752
server_settings[u"priority"],
1753
use_dbus=use_dbus)
1754
pidfilename = u"/var/run/mandos.pid"
1755
try:
1756
pidfile = open(pidfilename, u"w")
1757
except IOError:
1758
logger.error(u"Could not open file %r", pidfilename)
1759
1760
try:
1761
uid = pwd.getpwnam(u"_mandos").pw_uid
1762
gid = pwd.getpwnam(u"_mandos").pw_gid
979
1763
except KeyError:
980
1764
try:
981
uid = pwd.getpwnam("mandos").pw_uid
1765
uid = pwd.getpwnam(u"mandos").pw_uid
1766
gid = pwd.getpwnam(u"mandos").pw_gid
982
1767
except KeyError:
983
1768
try:
984
uid = pwd.getpwnam("nobody").pw_uid
1769
uid = pwd.getpwnam(u"nobody").pw_uid
1770
gid = pwd.getpwnam(u"nobody").pw_gid
985
1771
except KeyError:
986
1772
uid = 65534
987
try:
988
gid = pwd.getpwnam("_mandos").pw_gid
989
except KeyError:
990
try:
991
gid = pwd.getpwnam("mandos").pw_gid
992
except KeyError:
993
try:
994
gid = pwd.getpwnam("nogroup").pw_gid
995
except KeyError:
996
1773
gid = 65534
997
1774
try:
1775
os.setgid(gid)
998
1776
os.setuid(uid)
999
os.setgid(gid)
1000
1777
except OSError, error:
1001
1778
if error[0] != errno.EPERM:
1002
1779
raise error
1003
1780
1004
global service
1005
service = AvahiService(name = server_settings["servicename"],
1006
servicetype = "_mandos._tcp", )
1007
if server_settings["interface"]:
1008
service.interface = (if_nametoindex
1009
(server_settings["interface"]))
1781
if not debug and not debuglevel:
1782
syslogger.setLevel(logging.WARNING)
1783
console.setLevel(logging.WARNING)
1784
if debuglevel:
1785
level = getattr(logging, debuglevel.upper())
1786
syslogger.setLevel(level)
1787
console.setLevel(level)
1788
1789
if debug:
1790
# Enable all possible GnuTLS debugging
1791
1792
# "Use a log level over 10 to enable all debugging options."
1793
# - GnuTLS manual
1794
gnutls.library.functions.gnutls_global_set_log_level(11)
1795
1796
@gnutls.library.types.gnutls_log_func
1797
def debug_gnutls(level, string):
1798
logger.debug(u"GnuTLS: %s", string[:-1])
1799
1800
(gnutls.library.functions
1801
.gnutls_global_set_log_function(debug_gnutls))
1802
1803
# Redirect stdin so all checkers get /dev/null
1804
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1805
os.dup2(null, sys.stdin.fileno())
1806
if null > 2:
1807
os.close(null)
1808
else:
1809
# No console logging
1810
logger.removeHandler(console)
1811
1010
1812
1011
1813
global main_loop
1012
global bus
1013
global server
1014
1814
# From the Avahi example code
1015
1815
DBusGMainLoop(set_as_default=True )
1016
1816
main_loop = gobject.MainLoop()
1017
1817
bus = dbus.SystemBus()
1018
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1019
avahi.DBUS_PATH_SERVER),
1020
avahi.DBUS_INTERFACE_SERVER)
1021
1818
# End of Avahi example code
1022
bus_name = dbus.service.BusName(u"org.mandos-system.Mandos", bus)
1023
1024
clients.update(Set(Client(name = section,
1025
config
1026
= dict(client_config.items(section)))
1027
for section in client_config.sections()))
1028
if not clients:
1029
logger.critical(u"No clients defined")
1030
sys.exit(1)
1031
1032
if debug:
1033
# Redirect stdin so all checkers get /dev/null
1034
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1035
os.dup2(null, sys.stdin.fileno())
1036
if null > 2:
1037
os.close(null)
1038
else:
1039
# No console logging
1040
logger.removeHandler(console)
1819
if use_dbus:
1820
try:
1821
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1822
bus, do_not_queue=True)
1823
except dbus.exceptions.NameExistsException, e:
1824
logger.error(unicode(e) + u", disabling D-Bus")
1825
use_dbus = False
1826
server_settings[u"use_dbus"] = False
1827
tcp_server.use_dbus = False
1828
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1829
service = AvahiService(name = server_settings[u"servicename"],
1830
servicetype = u"_mandos._tcp",
1831
protocol = protocol, bus = bus)
1832
if server_settings["interface"]:
1833
service.interface = (if_nametoindex
1834
(str(server_settings[u"interface"])))
1835
1836
if not debug:
1041
1837
# Close all input and output, do double fork, etc.
1042
1838
daemon()
1043
1839
1840
global multiprocessing_manager
1841
multiprocessing_manager = multiprocessing.Manager()
1842
1843
client_class = Client
1844
if use_dbus:
1845
client_class = functools.partial(ClientDBus, bus = bus)
1846
def client_config_items(config, section):
1847
special_settings = {
1848
"approved_by_default":
1849
lambda: config.getboolean(section,
1850
"approved_by_default"),
1851
}
1852
for name, value in config.items(section):
1853
try:
1854
yield (name, special_settings[name]())
1855
except KeyError:
1856
yield (name, value)
1857
1858
tcp_server.clients.update(set(
1859
client_class(name = section,
1860
config= dict(client_config_items(
1861
client_config, section)))
1862
for section in client_config.sections()))
1863
if not tcp_server.clients:
1864
logger.warning(u"No clients defined")
1865
1044
1866
try:
1045
pid = os.getpid()
1046
pidfile.write(str(pid) + "\n")
1047
pidfile.close()
1867
with pidfile:
1868
pid = os.getpid()
1869
pidfile.write(str(pid) + "\n")
1048
1870
del pidfile
1049
1871
except IOError:
1050
1872
logger.error(u"Could not write to file %r with PID %d",
1054
1876
pass
1055
1877
del pidfilename
1056
1878
1879
if not debug:
1880
signal.signal(signal.SIGINT, signal.SIG_IGN)
1881
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1882
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1883
1884
if use_dbus:
1885
class MandosDBusService(dbus.service.Object):
1886
"""A D-Bus proxy object"""
1887
def __init__(self):
1888
dbus.service.Object.__init__(self, bus, u"/")
1889
_interface = u"se.bsnet.fukt.Mandos"
1890
1891
@dbus.service.signal(_interface, signature=u"o")
1892
def ClientAdded(self, objpath):
1893
"D-Bus signal"
1894
pass
1895
1896
@dbus.service.signal(_interface, signature=u"ss")
1897
def ClientNotFound(self, fingerprint, address):
1898
"D-Bus signal"
1899
pass
1900
1901
@dbus.service.signal(_interface, signature=u"os")
1902
def ClientRemoved(self, objpath, name):
1903
"D-Bus signal"
1904
pass
1905
1906
@dbus.service.method(_interface, out_signature=u"ao")
1907
def GetAllClients(self):
1908
"D-Bus method"
1909
return dbus.Array(c.dbus_object_path
1910
for c in tcp_server.clients)
1911
1912
@dbus.service.method(_interface,
1913
out_signature=u"a{oa{sv}}")
1914
def GetAllClientsWithProperties(self):
1915
"D-Bus method"
1916
return dbus.Dictionary(
1917
((c.dbus_object_path, c.GetAll(u""))
1918
for c in tcp_server.clients),
1919
signature=u"oa{sv}")
1920
1921
@dbus.service.method(_interface, in_signature=u"o")
1922
def RemoveClient(self, object_path):
1923
"D-Bus method"
1924
for c in tcp_server.clients:
1925
if c.dbus_object_path == object_path:
1926
tcp_server.clients.remove(c)
1927
c.remove_from_connection()
1928
# Don't signal anything except ClientRemoved
1929
c.disable(quiet=True)
1930
# Emit D-Bus signal
1931
self.ClientRemoved(object_path, c.name)
1932
return
1933
raise KeyError(object_path)
1934
1935
del _interface
1936
1937
mandos_dbus_service = MandosDBusService()
1938
1057
1939
def cleanup():
1058
1940
"Cleanup function; run on exit"
1059
global group
1060
# From the Avahi example code
1061
if not group is None:
1062
group.Free()
1063
group = None
1064
# End of Avahi example code
1941
service.cleanup()
1065
1942
1066
while clients:
1067
client = clients.pop()
1943
while tcp_server.clients:
1944
client = tcp_server.clients.pop()
1945
if use_dbus:
1946
client.remove_from_connection()
1068
1947
client.disable_hook = None
1069
client.disable()
1948
# Don't signal anything except ClientRemoved
1949
client.disable(quiet=True)
1950
if use_dbus:
1951
# Emit D-Bus signal
1952
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1953
client.name)
1070
1954
1071
1955
atexit.register(cleanup)
1072
1956
1073
if not debug:
1074
signal.signal(signal.SIGINT, signal.SIG_IGN)
1075
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1076
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1077
1078
class MandosServer(dbus.service.Object):
1079
"""A D-Bus proxy object"""
1080
def __init__(self):
1081
dbus.service.Object.__init__(self, bus,
1082
"/Mandos")
1083
_interface = u"org.mandos_system.Mandos"
1084
1085
@dbus.service.signal(_interface, signature="oa{sv}")
1086
def ClientAdded(self, objpath, properties):
1087
"D-Bus signal"
1088
pass
1089
1090
@dbus.service.signal(_interface, signature="o")
1091
def ClientRemoved(self, objpath):
1092
"D-Bus signal"
1093
pass
1094
1095
@dbus.service.method(_interface, out_signature="ao")
1096
def GetAllClients(self):
1097
return dbus.Array(c.dbus_object_path for c in clients)
1098
1099
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1100
def GetAllClientsWithProperties(self):
1101
return dbus.Dictionary(
1102
((c.dbus_object_path, c.GetAllProperties())
1103
for c in clients),
1104
signature="oa{sv}")
1105
1106
@dbus.service.method(_interface, in_signature="o")
1107
def RemoveClient(self, object_path):
1108
for c in clients:
1109
if c.dbus_object_path == object_path:
1110
c.disable()
1111
clients.remove(c)
1112
return
1113
raise KeyError
1114
1115
del _interface
1116
1117
mandos_server = MandosServer()
1118
1119
for client in clients:
1120
# Emit D-Bus signal
1121
mandos_server.ClientAdded(client.dbus_object_path,
1122
client.GetAllProperties())
1957
for client in tcp_server.clients:
1958
if use_dbus:
1959
# Emit D-Bus signal
1960
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1123
1961
client.enable()
1124
1962
1125
1963
tcp_server.enable()
1127
1965
1128
1966
# Find out what port we got
1129
1967
service.port = tcp_server.socket.getsockname()[1]
1130
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1131
u" scope_id %d" % tcp_server.socket.getsockname())
1968
if use_ipv6:
1969
logger.info(u"Now listening on address %r, port %d,"
1970
" flowinfo %d, scope_id %d"
1971
% tcp_server.socket.getsockname())
1972
else: # IPv4
1973
logger.info(u"Now listening on address %r, port %d"
1974
% tcp_server.socket.getsockname())
1132
1975
1133
1976
#service.interface = tcp_server.socket.getsockname()[3]
1134
1977
1135
1978
try:
1136
1979
# From the Avahi example code
1137
server.connect_to_signal("StateChanged", server_state_changed)
1138
1980
try:
1139
server_state_changed(server.GetState())
1981
service.activate()
1140
1982
except dbus.exceptions.DBusException, error:
1141
1983
logger.critical(u"DBusException: %s", error)
1984
cleanup()
1142
1985
sys.exit(1)
1143
1986
# End of Avahi example code
1144
1987
1150
1993
logger.debug(u"Starting main loop")
1151
1994
main_loop.run()
1152
1995
except AvahiError, error:
1153
logger.critical(u"AvahiError: %s" + unicode(error))
1996
logger.critical(u"AvahiError: %s", error)
1997
cleanup()
1154
1998
sys.exit(1)
1155
1999
except KeyboardInterrupt:
1156
2000
if debug:
1157
print
2001
print >> sys.stderr
2002
logger.debug(u"Server received KeyboardInterrupt")
2003
logger.debug(u"Server exiting")
2004
# Must run before the D-Bus bus name gets deregistered
2005
cleanup()
1158
2006
1159
2007
if __name__ == '__main__':
1160
2008
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0