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- Committer: Björn Påhlsson
- Date: 2007-12-11 23:40:35 UTC
- Revision ID: belorn@braxen-20071211234035-m1nsu41vuzkak69h
Python based server
Added client configfile
Added client configfile
- files added:
- bad-ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- plugins.d
- files renamed:
- clients.conf => mandos-clients.conf
- mandos => server.py
- files modified:
- Makefile
added
removed
server.py
1
1
#!/usr/bin/python
2
# -*- mode: python; coding: utf-8 -*-
3
#
4
# Mandos server - give out binary blobs to connecting clients.
5
#
6
# This program is partly derived from an example program for an Avahi
7
# service publisher, downloaded from
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".
12
#
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
19
# the Free Software Foundation, either version 3 of the License, or
20
# (at your option) any later version.
21
#
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
# GNU General Public License for more details.
26
#
27
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
33
34
from __future__ import division, with_statement, absolute_import
35
2
36
3
import SocketServer
37
4
import socket
38
import optparse
5
import select
6
from optparse import OptionParser
39
7
import datetime
40
8
import errno
41
9
import gnutls.crypto
42
10
import gnutls.connection
43
11
import gnutls.errors
44
import gnutls.library.functions
45
import gnutls.library.constants
46
import gnutls.library.types
47
12
import ConfigParser
48
import sys
49
import re
50
import os
51
import signal
52
from sets import Set
53
import subprocess
54
import atexit
55
import stat
56
import logging
57
import logging.handlers
58
import pwd
59
from contextlib import closing
60
61
import dbus
62
import dbus.service
63
import gobject
64
import avahi
65
from dbus.mainloop.glib import DBusGMainLoop
66
import ctypes
67
import ctypes.util
68
69
version = "1.0.5"
70
71
logger = logging.Logger('mandos')
72
syslogger = (logging.handlers.SysLogHandler
73
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
address = "/dev/log"))
75
syslogger.setFormatter(logging.Formatter
76
('Mandos: %(levelname)s: %(message)s'))
77
logger.addHandler(syslogger)
78
79
console = logging.StreamHandler()
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
81
' %(message)s'))
82
logger.addHandler(console)
83
84
class AvahiError(Exception):
85
def __init__(self, value, *args, **kwargs):
86
self.value = value
87
super(AvahiError, self).__init__(value, *args, **kwargs)
88
def __unicode__(self):
89
return unicode(repr(self.value))
90
91
class AvahiServiceError(AvahiError):
92
pass
93
94
class AvahiGroupError(AvahiError):
95
pass
96
97
98
class AvahiService(object):
99
"""An Avahi (Zeroconf) service.
100
Attributes:
101
interface: integer; avahi.IF_UNSPEC or an interface index.
102
Used to optionally bind to the specified interface.
103
name: string; Example: 'Mandos'
104
type: string; Example: '_mandos._tcp'.
105
See <http://www.dns-sd.org/ServiceTypes.html>
106
port: integer; what port to announce
107
TXT: list of strings; TXT record for the service
108
domain: string; Domain to publish on, default to .local if empty.
109
host: string; Host to publish records for, default is localhost
110
max_renames: integer; maximum number of renames
111
rename_count: integer; counter so we only rename after collisions
112
a sensible number of times
113
"""
114
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
servicetype = None, port = None, TXT = None,
116
domain = "", host = "", max_renames = 32768):
117
self.interface = interface
118
self.name = name
119
self.type = servicetype
120
self.port = port
121
self.TXT = TXT if TXT is not None else []
122
self.domain = domain
123
self.host = host
124
self.rename_count = 0
125
self.max_renames = max_renames
126
def rename(self):
127
"""Derived from the Avahi example code"""
128
if self.rename_count >= self.max_renames:
129
logger.critical(u"No suitable Zeroconf service name found"
130
u" after %i retries, exiting.",
131
self.rename_count)
132
raise AvahiServiceError(u"Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
134
logger.info(u"Changing Zeroconf service name to %r ...",
135
str(self.name))
136
syslogger.setFormatter(logging.Formatter
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
139
self.remove()
140
self.add()
141
self.rename_count += 1
142
def remove(self):
143
"""Derived from the Avahi example code"""
144
if group is not None:
145
group.Reset()
146
def add(self):
147
"""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)
156
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):
179
"""A representation of a client host served by this server.
180
Attributes:
181
name: string; from the config file, used in log messages and
182
D-Bus identifiers
183
fingerprint: string (40 or 32 hexadecimal digits); used to
184
uniquely identify the client
185
secret: bytestring; sent verbatim (over TLS) to client
186
host: string; available for use by the checker command
187
created: datetime.datetime(); (UTC) object creation
188
last_enabled: datetime.datetime(); (UTC)
189
enabled: bool()
190
last_checked_ok: datetime.datetime(); (UTC) or None
191
timeout: datetime.timedelta(); How long from last_checked_ok
192
until this client is invalid
193
interval: datetime.timedelta(); How often to start a new checker
194
disable_hook: If set, called by disable() as disable_hook(self)
195
checker: subprocess.Popen(); a running checker process used
196
to see if the client lives.
197
'None' if no process is running.
198
checker_initiator_tag: a gobject event source tag, or None
199
disable_initiator_tag: - '' -
200
checker_callback_tag: - '' -
201
checker_command: string; External command which is run to check if
202
client lives. %() expansions are done at
203
runtime with vars(self) as dict, so that for
204
instance %(name)s can be used in the command.
205
use_dbus: bool(); Whether to provide D-Bus interface and signals
206
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
207
"""
208
def timeout_milliseconds(self):
209
"Return the 'timeout' attribute in milliseconds"
210
return ((self.timeout.days * 24 * 60 * 60 * 1000)
211
+ (self.timeout.seconds * 1000)
212
+ (self.timeout.microseconds // 1000))
213
214
def interval_milliseconds(self):
215
"Return the 'interval' attribute in milliseconds"
216
return ((self.interval.days * 24 * 60 * 60 * 1000)
217
+ (self.interval.seconds * 1000)
218
+ (self.interval.microseconds // 1000))
219
220
def __init__(self, name = None, disable_hook=None, config=None,
221
use_dbus=True):
222
"""Note: the 'checker' key in 'config' sets the
223
'checker_command' attribute and *not* the 'checker'
224
attribute."""
225
self.name = name
226
if config is None:
227
config = {}
228
logger.debug(u"Creating client %r", self.name)
229
self.use_dbus = False # During __init__
230
# Uppercase and remove spaces from fingerprint for later
231
# comparison purposes with return value from the fingerprint()
232
# function
233
self.fingerprint = (config["fingerprint"].upper()
234
.replace(u" ", u""))
235
logger.debug(u" Fingerprint: %s", self.fingerprint)
236
if "secret" in config:
237
self.secret = config["secret"].decode(u"base64")
238
elif "secfile" in config:
239
with closing(open(os.path.expanduser
240
(os.path.expandvars
241
(config["secfile"])))) as secfile:
242
self.secret = secfile.read()
243
else:
244
raise TypeError(u"No secret or secfile for client %s"
245
% self.name)
246
self.host = config.get("host", "")
247
self.created = datetime.datetime.utcnow()
248
self.enabled = False
249
self.last_enabled = None
250
self.last_checked_ok = None
251
self.timeout = string_to_delta(config["timeout"])
252
self.interval = string_to_delta(config["interval"])
253
self.disable_hook = disable_hook
254
self.checker = None
255
self.checker_initiator_tag = None
256
self.disable_initiator_tag = None
257
self.checker_callback_tag = None
258
self.checker_command = config["checker"]
259
self.last_connect = None
260
# Only now, when this client is initialized, can it show up on
261
# the D-Bus
262
self.use_dbus = use_dbus
263
if self.use_dbus:
264
self.dbus_object_path = (dbus.ObjectPath
265
("/clients/"
266
+ self.name.replace(".", "_")))
267
dbus.service.Object.__init__(self, bus,
268
self.dbus_object_path)
269
270
def enable(self):
271
"""Start this client's checker and timeout hooks"""
272
self.last_enabled = datetime.datetime.utcnow()
273
# Schedule a new checker to be started an 'interval' from now,
274
# and every interval from then on.
275
self.checker_initiator_tag = (gobject.timeout_add
276
(self.interval_milliseconds(),
277
self.start_checker))
278
# Also start a new checker *right now*.
279
self.start_checker()
280
# Schedule a disable() when 'timeout' has passed
281
self.disable_initiator_tag = (gobject.timeout_add
282
(self.timeout_milliseconds(),
283
self.disable))
284
self.enabled = True
285
if self.use_dbus:
286
# Emit D-Bus signals
287
self.PropertyChanged(dbus.String(u"enabled"),
288
dbus.Boolean(True, variant_level=1))
289
self.PropertyChanged(dbus.String(u"last_enabled"),
290
(_datetime_to_dbus(self.last_enabled,
291
variant_level=1)))
292
293
def disable(self):
294
"""Disable this client."""
295
if not getattr(self, "enabled", False):
296
return False
297
logger.info(u"Disabling client %s", self.name)
298
if getattr(self, "disable_initiator_tag", False):
299
gobject.source_remove(self.disable_initiator_tag)
300
self.disable_initiator_tag = None
301
if getattr(self, "checker_initiator_tag", False):
302
gobject.source_remove(self.checker_initiator_tag)
303
self.checker_initiator_tag = None
304
self.stop_checker()
305
if self.disable_hook:
306
self.disable_hook(self)
307
self.enabled = False
308
if self.use_dbus:
309
# Emit D-Bus signal
310
self.PropertyChanged(dbus.String(u"enabled"),
311
dbus.Boolean(False, variant_level=1))
312
# Do not run this again if called by a gobject.timeout_add
313
return False
314
315
def __del__(self):
316
self.disable_hook = None
317
self.disable()
318
319
def checker_callback(self, pid, condition, command):
320
"""The checker has completed, so take appropriate actions."""
321
self.checker_callback_tag = None
322
self.checker = None
323
if self.use_dbus:
324
# Emit D-Bus signal
325
self.PropertyChanged(dbus.String(u"checker_running"),
326
dbus.Boolean(False, variant_level=1))
327
if (os.WIFEXITED(condition)
328
and (os.WEXITSTATUS(condition) == 0)):
329
logger.info(u"Checker for %(name)s succeeded",
330
vars(self))
331
if self.use_dbus:
332
# Emit D-Bus signal
333
self.CheckerCompleted(dbus.Boolean(True),
334
dbus.UInt16(condition),
335
dbus.String(command))
336
self.bump_timeout()
337
elif not os.WIFEXITED(condition):
338
logger.warning(u"Checker for %(name)s crashed?",
339
vars(self))
340
if self.use_dbus:
341
# Emit D-Bus signal
342
self.CheckerCompleted(dbus.Boolean(False),
343
dbus.UInt16(condition),
344
dbus.String(command))
345
else:
346
logger.info(u"Checker for %(name)s failed",
347
vars(self))
348
if self.use_dbus:
349
# Emit D-Bus signal
350
self.CheckerCompleted(dbus.Boolean(False),
351
dbus.UInt16(condition),
352
dbus.String(command))
353
354
def bump_timeout(self):
355
"""Bump up the timeout for this client.
356
This should only be called when the client has been seen,
357
alive and well.
358
"""
359
self.last_checked_ok = datetime.datetime.utcnow()
360
gobject.source_remove(self.disable_initiator_tag)
361
self.disable_initiator_tag = (gobject.timeout_add
362
(self.timeout_milliseconds(),
363
self.disable))
364
if self.use_dbus:
365
# Emit D-Bus signal
366
self.PropertyChanged(
367
dbus.String(u"last_checked_ok"),
368
(_datetime_to_dbus(self.last_checked_ok,
369
variant_level=1)))
370
371
def start_checker(self):
372
"""Start a new checker subprocess if one is not running.
373
If a checker already exists, leave it running and do
374
nothing."""
375
# The reason for not killing a running checker is that if we
376
# did that, then if a checker (for some reason) started
377
# running slowly and taking more than 'interval' time, the
378
# client would inevitably timeout, since no checker would get
379
# a chance to run to completion. If we instead leave running
380
# checkers alone, the checker would have to take more time
381
# than 'timeout' for the client to be declared invalid, which
382
# is as it should be.
383
if self.checker is None:
384
try:
385
# In case checker_command has exactly one % operator
386
command = self.checker_command % self.host
387
except TypeError:
388
# Escape attributes for the shell
389
escaped_attrs = dict((key, re.escape(str(val)))
390
for key, val in
391
vars(self).iteritems())
392
try:
393
command = self.checker_command % escaped_attrs
394
except TypeError, error:
395
logger.error(u'Could not format string "%s":'
396
u' %s', self.checker_command, error)
397
return True # Try again later
398
try:
399
logger.info(u"Starting checker %r for %s",
400
command, self.name)
401
# We don't need to redirect stdout and stderr, since
402
# in normal mode, that is already done by daemon(),
403
# and in debug mode we don't want to. (Stdin is
404
# always replaced by /dev/null.)
405
self.checker = subprocess.Popen(command,
406
close_fds=True,
407
shell=True, cwd="/")
408
if self.use_dbus:
409
# Emit D-Bus signal
410
self.CheckerStarted(command)
411
self.PropertyChanged(
412
dbus.String("checker_running"),
413
dbus.Boolean(True, variant_level=1))
414
self.checker_callback_tag = (gobject.child_watch_add
415
(self.checker.pid,
416
self.checker_callback,
417
data=command))
418
except OSError, error:
419
logger.error(u"Failed to start subprocess: %s",
420
error)
421
# Re-run this periodically if run by gobject.timeout_add
422
return True
423
424
def stop_checker(self):
425
"""Force the checker process, if any, to stop."""
426
if self.checker_callback_tag:
427
gobject.source_remove(self.checker_callback_tag)
428
self.checker_callback_tag = None
429
if getattr(self, "checker", None) is None:
430
return
431
logger.debug(u"Stopping checker for %(name)s", vars(self))
432
try:
433
os.kill(self.checker.pid, signal.SIGTERM)
434
#os.sleep(0.5)
435
#if self.checker.poll() is None:
436
# os.kill(self.checker.pid, signal.SIGKILL)
437
except OSError, error:
438
if error.errno != errno.ESRCH: # No such process
439
raise
440
self.checker = None
441
if self.use_dbus:
442
self.PropertyChanged(dbus.String(u"checker_running"),
443
dbus.Boolean(False, variant_level=1))
444
445
def still_valid(self):
446
"""Has the timeout not yet passed for this client?"""
447
if not getattr(self, "enabled", False):
448
return False
449
now = datetime.datetime.utcnow()
450
if self.last_checked_ok is None:
451
return now < (self.created + self.timeout)
452
else:
453
return now < (self.last_checked_ok + self.timeout)
454
455
## D-Bus methods & signals
456
_interface = u"se.bsnet.fukt.Mandos.Client"
457
458
# BumpTimeout - method
459
BumpTimeout = dbus.service.method(_interface)(bump_timeout)
460
BumpTimeout.__name__ = "BumpTimeout"
461
462
# CheckerCompleted - signal
463
@dbus.service.signal(_interface, signature="bqs")
464
def CheckerCompleted(self, success, condition, command):
465
"D-Bus signal"
466
pass
467
468
# CheckerStarted - signal
469
@dbus.service.signal(_interface, signature="s")
470
def CheckerStarted(self, command):
471
"D-Bus signal"
472
pass
473
474
# GetAllProperties - method
475
@dbus.service.method(_interface, out_signature="a{sv}")
476
def GetAllProperties(self):
477
"D-Bus method"
478
return dbus.Dictionary({
479
dbus.String("name"):
480
dbus.String(self.name, variant_level=1),
481
dbus.String("fingerprint"):
482
dbus.String(self.fingerprint, variant_level=1),
483
dbus.String("host"):
484
dbus.String(self.host, variant_level=1),
485
dbus.String("created"):
486
_datetime_to_dbus(self.created, variant_level=1),
487
dbus.String("last_enabled"):
488
(_datetime_to_dbus(self.last_enabled,
489
variant_level=1)
490
if self.last_enabled is not None
491
else dbus.Boolean(False, variant_level=1)),
492
dbus.String("enabled"):
493
dbus.Boolean(self.enabled, variant_level=1),
494
dbus.String("last_checked_ok"):
495
(_datetime_to_dbus(self.last_checked_ok,
496
variant_level=1)
497
if self.last_checked_ok is not None
498
else dbus.Boolean (False, variant_level=1)),
499
dbus.String("timeout"):
500
dbus.UInt64(self.timeout_milliseconds(),
501
variant_level=1),
502
dbus.String("interval"):
503
dbus.UInt64(self.interval_milliseconds(),
504
variant_level=1),
505
dbus.String("checker"):
506
dbus.String(self.checker_command,
507
variant_level=1),
508
dbus.String("checker_running"):
509
dbus.Boolean(self.checker is not None,
510
variant_level=1),
511
dbus.String("object_path"):
512
dbus.ObjectPath(self.dbus_object_path,
513
variant_level=1)
514
}, signature="sv")
515
516
# IsStillValid - method
517
IsStillValid = (dbus.service.method(_interface, out_signature="b")
518
(still_valid))
519
IsStillValid.__name__ = "IsStillValid"
520
521
# PropertyChanged - signal
522
@dbus.service.signal(_interface, signature="sv")
523
def PropertyChanged(self, property, value):
524
"D-Bus signal"
525
pass
526
527
# SetChecker - method
528
@dbus.service.method(_interface, in_signature="s")
529
def SetChecker(self, checker):
530
"D-Bus setter method"
531
self.checker_command = checker
532
# Emit D-Bus signal
533
self.PropertyChanged(dbus.String(u"checker"),
534
dbus.String(self.checker_command,
535
variant_level=1))
536
537
# SetHost - method
538
@dbus.service.method(_interface, in_signature="s")
539
def SetHost(self, host):
540
"D-Bus setter method"
541
self.host = host
542
# Emit D-Bus signal
543
self.PropertyChanged(dbus.String(u"host"),
544
dbus.String(self.host, variant_level=1))
545
546
# SetInterval - method
547
@dbus.service.method(_interface, in_signature="t")
548
def SetInterval(self, milliseconds):
549
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
550
# Emit D-Bus signal
551
self.PropertyChanged(dbus.String(u"interval"),
552
(dbus.UInt64(self.interval_milliseconds(),
553
variant_level=1)))
554
555
# SetSecret - method
556
@dbus.service.method(_interface, in_signature="ay",
557
byte_arrays=True)
558
def SetSecret(self, secret):
559
"D-Bus setter method"
560
self.secret = str(secret)
561
562
# SetTimeout - method
563
@dbus.service.method(_interface, in_signature="t")
564
def SetTimeout(self, milliseconds):
565
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
566
# Emit D-Bus signal
567
self.PropertyChanged(dbus.String(u"timeout"),
568
(dbus.UInt64(self.timeout_milliseconds(),
569
variant_level=1)))
570
571
# Enable - method
572
Enable = dbus.service.method(_interface)(enable)
573
Enable.__name__ = "Enable"
574
575
# StartChecker - method
576
@dbus.service.method(_interface)
577
def StartChecker(self):
578
"D-Bus method"
579
self.start_checker()
580
581
# Disable - method
582
@dbus.service.method(_interface)
583
def Disable(self):
584
"D-Bus method"
585
self.disable()
586
587
# StopChecker - method
588
StopChecker = dbus.service.method(_interface)(stop_checker)
589
StopChecker.__name__ = "StopChecker"
590
591
del _interface
592
593
594
def peer_certificate(session):
595
"Return the peer's OpenPGP certificate as a bytestring"
596
# If not an OpenPGP certificate...
597
if (gnutls.library.functions
598
.gnutls_certificate_type_get(session._c_object)
599
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
600
# ...do the normal thing
601
return session.peer_certificate
602
list_size = ctypes.c_uint()
603
cert_list = (gnutls.library.functions
604
.gnutls_certificate_get_peers
605
(session._c_object, ctypes.byref(list_size)))
606
if list_size.value == 0:
607
return None
608
cert = cert_list[0]
609
return ctypes.string_at(cert.data, cert.size)
610
611
612
def fingerprint(openpgp):
613
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
614
# New GnuTLS "datum" with the OpenPGP public key
615
datum = (gnutls.library.types
616
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
617
ctypes.POINTER
618
(ctypes.c_ubyte)),
619
ctypes.c_uint(len(openpgp))))
620
# New empty GnuTLS certificate
621
crt = gnutls.library.types.gnutls_openpgp_crt_t()
622
(gnutls.library.functions
623
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
624
# Import the OpenPGP public key into the certificate
625
(gnutls.library.functions
626
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
627
gnutls.library.constants
628
.GNUTLS_OPENPGP_FMT_RAW))
629
# Verify the self signature in the key
630
crtverify = ctypes.c_uint()
631
(gnutls.library.functions
632
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
633
if crtverify.value != 0:
634
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
635
raise gnutls.errors.CertificateSecurityError("Verify failed")
636
# New buffer for the fingerprint
637
buf = ctypes.create_string_buffer(20)
638
buf_len = ctypes.c_size_t()
639
# Get the fingerprint from the certificate into the buffer
640
(gnutls.library.functions
641
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
642
ctypes.byref(buf_len)))
643
# Deinit the certificate
644
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
645
# Convert the buffer to a Python bytestring
646
fpr = ctypes.string_at(buf, buf_len.value)
647
# Convert the bytestring to hexadecimal notation
648
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
649
return hex_fpr
650
651
652
class TCP_handler(SocketServer.BaseRequestHandler, object):
653
"""A TCP request handler class.
654
Instantiated by IPv6_TCPServer for each request to handle it.
655
Note: This will run in its own forked process."""
656
657
def handle(self):
658
logger.info(u"TCP connection from: %s",
659
unicode(self.client_address))
660
session = (gnutls.connection
661
.ClientSession(self.request,
662
gnutls.connection
663
.X509Credentials()))
664
665
line = self.request.makefile().readline()
666
logger.debug(u"Protocol version: %r", line)
667
try:
668
if int(line.strip().split()[0]) > 1:
669
raise RuntimeError
670
except (ValueError, IndexError, RuntimeError), error:
671
logger.error(u"Unknown protocol version: %s", error)
672
return
673
674
# Note: gnutls.connection.X509Credentials is really a generic
675
# GnuTLS certificate credentials object so long as no X.509
676
# keys are added to it. Therefore, we can use it here despite
677
# using OpenPGP certificates.
678
679
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
680
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
681
# "+DHE-DSS"))
682
# Use a fallback default, since this MUST be set.
683
priority = self.server.settings.get("priority", "NORMAL")
684
(gnutls.library.functions
685
.gnutls_priority_set_direct(session._c_object,
686
priority, None))
687
688
try:
689
session.handshake()
690
except gnutls.errors.GNUTLSError, error:
691
logger.warning(u"Handshake failed: %s", error)
692
# Do not run session.bye() here: the session is not
693
# established. Just abandon the request.
694
return
695
try:
696
fpr = fingerprint(peer_certificate(session))
697
except (TypeError, gnutls.errors.GNUTLSError), error:
698
logger.warning(u"Bad certificate: %s", error)
699
session.bye()
700
return
701
logger.debug(u"Fingerprint: %s", fpr)
702
for c in self.server.clients:
703
if c.fingerprint == fpr:
704
client = c
705
break
706
else:
707
logger.warning(u"Client not found for fingerprint: %s",
708
fpr)
709
session.bye()
710
return
711
# Have to check if client.still_valid(), since it is possible
712
# that the client timed out while establishing the GnuTLS
713
# session.
714
if not client.still_valid():
715
logger.warning(u"Client %(name)s is invalid",
716
vars(client))
717
session.bye()
718
return
719
## This won't work here, since we're in a fork.
720
# client.bump_timeout()
721
sent_size = 0
722
while sent_size < len(client.secret):
723
sent = session.send(client.secret[sent_size:])
724
logger.debug(u"Sent: %d, remaining: %d",
725
sent, len(client.secret)
726
- (sent_size + sent))
727
sent_size += sent
13
14
class Client(object):
15
def __init__(self, name=None, dn=None, password=None,
16
passfile=None, fqdn=None, timeout=None,
17
interval=-1):
18
self.name = name
19
self.dn = dn
20
if password:
21
self.password = password
22
elif passfile:
23
self.password = open(passfile).readall()
24
else:
25
print "No Password or Passfile in client config file"
26
# raise RuntimeError XXX
27
self.password = "gazonk"
28
self.fqdn = fqdn
29
# self.created = ...
30
self.last_seen = None
31
if timeout is None:
32
timeout = self.server.options.timeout
33
self.timeout = timeout
34
if interval == -1:
35
interval = self.server.options.interval
36
self.interval = interval
37
38
def server_bind(self):
39
if self.options.interface:
40
if not hasattr(socket, "SO_BINDTODEVICE"):
41
# From /usr/include/asm-i486/socket.h
42
socket.SO_BINDTODEVICE = 25
43
try:
44
self.socket.setsockopt(socket.SOL_SOCKET,
45
socket.SO_BINDTODEVICE,
46
self.options.interface)
47
except socket.error, error:
48
if error[0] == errno.EPERM:
49
print "Warning: Denied permission to bind to interface", \
50
self.options.interface
51
else:
52
raise error
53
return super(type(self), self).server_bind()
54
55
56
def init_with_options(self, *args, **kwargs):
57
if "options" in kwargs:
58
self.options = kwargs["options"]
59
del kwargs["options"]
60
if "clients" in kwargs:
61
self.clients = kwargs["clients"]
62
del kwargs["clients"]
63
if "credentials" in kwargs:
64
self.credentials = kwargs["credentials"]
65
del kwargs["credentials"]
66
return super(type(self), self).__init__(*args, **kwargs)
67
68
69
class udp_handler(SocketServer.DatagramRequestHandler, object):
70
def handle(self):
71
self.wfile.write("Polo")
72
print "UDP request answered"
73
74
75
class IPv6_UDPServer(SocketServer.UDPServer, object):
76
__init__ = init_with_options
77
address_family = socket.AF_INET6
78
allow_reuse_address = True
79
server_bind = server_bind
80
def verify_request(self, request, client_address):
81
print "UDP request came"
82
return request[0] == "Marco"
83
84
85
class tcp_handler(SocketServer.BaseRequestHandler, object):
86
def handle(self):
87
print "TCP request came"
88
print "Request:", self.request
89
print "Client Address:", self.client_address
90
print "Server:", self.server
91
session = gnutls.connection.ServerSession(self.request,
92
self.server.credentials)
93
session.handshake()
94
if session.peer_certificate:
95
print "DN:", session.peer_certificate.subject
96
try:
97
session.verify_peer()
98
except gnutls.errors.CertificateError, error:
99
print "Verify failed", error
100
session.bye()
101
return
102
try:
103
session.send(dict((client.dn, client.password)
104
for client in self.server.clients)
105
[session.peer_certificate.subject])
106
except KeyError:
107
session.send("gazonk")
108
# Log maybe? XXX
728
109
session.bye()
729
110
730
731
class IPv6_TCPServer(SocketServer.ForkingMixIn,
732
SocketServer.TCPServer, object):
733
"""IPv6 TCP server. Accepts 'None' as address and/or port.
734
Attributes:
735
settings: Server settings
736
clients: Set() of Client objects
737
enabled: Boolean; whether this server is activated yet
738
"""
111
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
112
__init__ = init_with_options
739
113
address_family = socket.AF_INET6
740
def __init__(self, *args, **kwargs):
741
if "settings" in kwargs:
742
self.settings = kwargs["settings"]
743
del kwargs["settings"]
744
if "clients" in kwargs:
745
self.clients = kwargs["clients"]
746
del kwargs["clients"]
747
self.enabled = False
748
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
749
def server_bind(self):
750
"""This overrides the normal server_bind() function
751
to bind to an interface if one was specified, and also NOT to
752
bind to an address or port if they were not specified."""
753
if self.settings["interface"]:
754
# 25 is from /usr/include/asm-i486/socket.h
755
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
756
try:
757
self.socket.setsockopt(socket.SOL_SOCKET,
758
SO_BINDTODEVICE,
759
self.settings["interface"])
760
except socket.error, error:
761
if error[0] == errno.EPERM:
762
logger.error(u"No permission to"
763
u" bind to interface %s",
764
self.settings["interface"])
765
else:
766
raise error
767
# Only bind(2) the socket if we really need to.
768
if self.server_address[0] or self.server_address[1]:
769
if not self.server_address[0]:
770
in6addr_any = "::"
771
self.server_address = (in6addr_any,
772
self.server_address[1])
773
elif not self.server_address[1]:
774
self.server_address = (self.server_address[0],
775
0)
776
# if self.settings["interface"]:
777
# self.server_address = (self.server_address[0],
778
# 0, # port
779
# 0, # flowinfo
780
# if_nametoindex
781
# (self.settings
782
# ["interface"]))
783
return super(IPv6_TCPServer, self).server_bind()
784
def server_activate(self):
785
if self.enabled:
786
return super(IPv6_TCPServer, self).server_activate()
787
def enable(self):
788
self.enabled = True
789
790
791
def string_to_delta(interval):
792
"""Parse a string and return a datetime.timedelta
793
794
>>> string_to_delta('7d')
795
datetime.timedelta(7)
796
>>> string_to_delta('60s')
797
datetime.timedelta(0, 60)
798
>>> string_to_delta('60m')
799
datetime.timedelta(0, 3600)
800
>>> string_to_delta('24h')
801
datetime.timedelta(1)
802
>>> string_to_delta(u'1w')
803
datetime.timedelta(7)
804
>>> string_to_delta('5m 30s')
805
datetime.timedelta(0, 330)
806
"""
807
timevalue = datetime.timedelta(0)
808
for s in interval.split():
809
try:
810
suffix = unicode(s[-1])
811
value = int(s[:-1])
812
if suffix == u"d":
813
delta = datetime.timedelta(value)
814
elif suffix == u"s":
815
delta = datetime.timedelta(0, value)
816
elif suffix == u"m":
817
delta = datetime.timedelta(0, 0, 0, 0, value)
818
elif suffix == u"h":
819
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
820
elif suffix == u"w":
821
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
822
else:
823
raise ValueError
824
except (ValueError, IndexError):
825
raise ValueError
826
timevalue += delta
827
return timevalue
828
829
830
def server_state_changed(state):
831
"""Derived from the Avahi example code"""
832
if state == avahi.SERVER_COLLISION:
833
logger.error(u"Zeroconf server name collision")
834
service.remove()
835
elif state == avahi.SERVER_RUNNING:
836
service.add()
837
838
839
def entry_group_state_changed(state, error):
840
"""Derived from the Avahi example code"""
841
logger.debug(u"Avahi state change: %i", state)
842
843
if state == avahi.ENTRY_GROUP_ESTABLISHED:
844
logger.debug(u"Zeroconf service established.")
845
elif state == avahi.ENTRY_GROUP_COLLISION:
846
logger.warning(u"Zeroconf service name collision.")
847
service.rename()
848
elif state == avahi.ENTRY_GROUP_FAILURE:
849
logger.critical(u"Avahi: Error in group state changed %s",
850
unicode(error))
851
raise AvahiGroupError(u"State changed: %s" % unicode(error))
852
853
def if_nametoindex(interface):
854
"""Call the C function if_nametoindex(), or equivalent"""
855
global if_nametoindex
856
try:
857
if_nametoindex = (ctypes.cdll.LoadLibrary
858
(ctypes.util.find_library("c"))
859
.if_nametoindex)
860
except (OSError, AttributeError):
861
if "struct" not in sys.modules:
862
import struct
863
if "fcntl" not in sys.modules:
864
import fcntl
865
def if_nametoindex(interface):
866
"Get an interface index the hard way, i.e. using fcntl()"
867
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
868
with closing(socket.socket()) as s:
869
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
870
struct.pack("16s16x", interface))
871
interface_index = struct.unpack("I", ifreq[16:20])[0]
872
return interface_index
873
return if_nametoindex(interface)
874
875
876
def daemon(nochdir = False, noclose = False):
877
"""See daemon(3). Standard BSD Unix function.
878
This should really exist as os.daemon, but it doesn't (yet)."""
879
if os.fork():
880
sys.exit()
881
os.setsid()
882
if not nochdir:
883
os.chdir("/")
884
if os.fork():
885
sys.exit()
886
if not noclose:
887
# Close all standard open file descriptors
888
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
889
if not stat.S_ISCHR(os.fstat(null).st_mode):
890
raise OSError(errno.ENODEV,
891
"/dev/null not a character device")
892
os.dup2(null, sys.stdin.fileno())
893
os.dup2(null, sys.stdout.fileno())
894
os.dup2(null, sys.stderr.fileno())
895
if null > 2:
896
os.close(null)
897
114
allow_reuse_address = True
115
request_queue_size = 1024
116
server_bind = server_bind
117
118
119
in6addr_any = "::"
120
121
cred = None
898
122
899
123
def main():
900
parser = optparse.OptionParser(version = "%%prog %s" % version)
124
parser = OptionParser()
901
125
parser.add_option("-i", "--interface", type="string",
902
metavar="IF", help="Bind to interface IF")
903
parser.add_option("-a", "--address", type="string",
904
help="Address to listen for requests on")
905
parser.add_option("-p", "--port", type="int",
126
default="eth0", metavar="IF",
127
help="Interface to bind to")
128
parser.add_option("--cert", type="string", default="cert.pem",
129
metavar="FILE",
130
help="Public key certificate to use")
131
parser.add_option("--key", type="string", default="key.pem",
132
metavar="FILE",
133
help="Private key to use")
134
parser.add_option("--ca", type="string", default="ca.pem",
135
metavar="FILE",
136
help="Certificate Authority certificate to use")
137
parser.add_option("--crl", type="string", default="crl.pem",
138
metavar="FILE",
139
help="Certificate Revokation List to use")
140
parser.add_option("-p", "--port", type="int", default=49001,
906
141
help="Port number to receive requests on")
907
parser.add_option("--check", action="store_true",
908
help="Run self-test")
909
parser.add_option("--debug", action="store_true",
910
help="Debug mode; run in foreground and log to"
911
" terminal")
912
parser.add_option("--priority", type="string", help="GnuTLS"
913
" priority string (see GnuTLS documentation)")
914
parser.add_option("--servicename", type="string", metavar="NAME",
915
help="Zeroconf service name")
916
parser.add_option("--configdir", type="string",
917
default="/etc/mandos", metavar="DIR",
918
help="Directory to search for configuration"
919
" files")
920
parser.add_option("--no-dbus", action="store_false",
921
dest="use_dbus",
922
help="Do not provide D-Bus system bus"
923
" interface")
924
options = parser.parse_args()[0]
925
926
if options.check:
927
import doctest
928
doctest.testmod()
929
sys.exit()
930
931
# Default values for config file for server-global settings
932
server_defaults = { "interface": "",
933
"address": "",
934
"port": "",
935
"debug": "False",
936
"priority":
937
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
938
"servicename": "Mandos",
939
"use_dbus": "True",
940
}
941
942
# Parse config file for server-global settings
943
server_config = ConfigParser.SafeConfigParser(server_defaults)
944
del server_defaults
945
server_config.read(os.path.join(options.configdir, "mandos.conf"))
946
# Convert the SafeConfigParser object to a dict
947
server_settings = server_config.defaults()
948
# Use getboolean on the boolean config options
949
server_settings["debug"] = (server_config.getboolean
950
("DEFAULT", "debug"))
951
server_settings["use_dbus"] = (server_config.getboolean
952
("DEFAULT", "use_dbus"))
953
del server_config
954
955
# Override the settings from the config file with command line
956
# options, if set.
957
for option in ("interface", "address", "port", "debug",
958
"priority", "servicename", "configdir",
959
"use_dbus"):
960
value = getattr(options, option)
961
if value is not None:
962
server_settings[option] = value
963
del options
964
# Now we have our good server settings in "server_settings"
965
966
# For convenience
967
debug = server_settings["debug"]
968
use_dbus = server_settings["use_dbus"]
969
970
if not debug:
971
syslogger.setLevel(logging.WARNING)
972
console.setLevel(logging.WARNING)
973
974
if server_settings["servicename"] != "Mandos":
975
syslogger.setFormatter(logging.Formatter
976
('Mandos (%s): %%(levelname)s:'
977
' %%(message)s'
978
% server_settings["servicename"]))
979
980
# Parse config file with clients
981
client_defaults = { "timeout": "1h",
982
"interval": "5m",
983
"checker": "fping -q -- %%(host)s",
984
"host": "",
985
}
986
client_config = ConfigParser.SafeConfigParser(client_defaults)
987
client_config.read(os.path.join(server_settings["configdir"],
988
"clients.conf"))
989
990
clients = Set()
991
tcp_server = IPv6_TCPServer((server_settings["address"],
992
server_settings["port"]),
993
TCP_handler,
994
settings=server_settings,
995
clients=clients)
996
pidfilename = "/var/run/mandos.pid"
997
try:
998
pidfile = open(pidfilename, "w")
999
except IOError, error:
1000
logger.error("Could not open file %r", pidfilename)
1001
1002
try:
1003
uid = pwd.getpwnam("_mandos").pw_uid
1004
gid = pwd.getpwnam("_mandos").pw_gid
1005
except KeyError:
1006
try:
1007
uid = pwd.getpwnam("mandos").pw_uid
1008
gid = pwd.getpwnam("mandos").pw_gid
1009
except KeyError:
1010
try:
1011
uid = pwd.getpwnam("nobody").pw_uid
1012
gid = pwd.getpwnam("nogroup").pw_gid
1013
except KeyError:
1014
uid = 65534
1015
gid = 65534
1016
try:
1017
os.setuid(uid)
1018
os.setgid(gid)
1019
except OSError, error:
1020
if error[0] != errno.EPERM:
1021
raise error
1022
1023
global service
1024
service = AvahiService(name = server_settings["servicename"],
1025
servicetype = "_mandos._tcp", )
1026
if server_settings["interface"]:
1027
service.interface = (if_nametoindex
1028
(server_settings["interface"]))
1029
1030
global main_loop
1031
global bus
1032
global server
1033
# From the Avahi example code
1034
DBusGMainLoop(set_as_default=True )
1035
main_loop = gobject.MainLoop()
1036
bus = dbus.SystemBus()
1037
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1038
avahi.DBUS_PATH_SERVER),
1039
avahi.DBUS_INTERFACE_SERVER)
1040
# End of Avahi example code
1041
if use_dbus:
1042
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1043
1044
clients.update(Set(Client(name = section,
1045
config
1046
= dict(client_config.items(section)),
1047
use_dbus = use_dbus)
1048
for section in client_config.sections()))
1049
if not clients:
1050
logger.warning(u"No clients defined")
1051
1052
if debug:
1053
# Redirect stdin so all checkers get /dev/null
1054
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1055
os.dup2(null, sys.stdin.fileno())
1056
if null > 2:
1057
os.close(null)
1058
else:
1059
# No console logging
1060
logger.removeHandler(console)
1061
# Close all input and output, do double fork, etc.
1062
daemon()
1063
1064
try:
1065
pid = os.getpid()
1066
pidfile.write(str(pid) + "\n")
1067
pidfile.close()
1068
del pidfile
1069
except IOError:
1070
logger.error(u"Could not write to file %r with PID %d",
1071
pidfilename, pid)
1072
except NameError:
1073
# "pidfile" was never created
1074
pass
1075
del pidfilename
1076
1077
def cleanup():
1078
"Cleanup function; run on exit"
1079
global group
1080
# From the Avahi example code
1081
if not group is None:
1082
group.Free()
1083
group = None
1084
# End of Avahi example code
1085
1086
while clients:
1087
client = clients.pop()
1088
client.disable_hook = None
1089
client.disable()
1090
1091
atexit.register(cleanup)
1092
1093
if not debug:
1094
signal.signal(signal.SIGINT, signal.SIG_IGN)
1095
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1096
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1097
1098
if use_dbus:
1099
class MandosServer(dbus.service.Object):
1100
"""A D-Bus proxy object"""
1101
def __init__(self):
1102
dbus.service.Object.__init__(self, bus, "/")
1103
_interface = u"se.bsnet.fukt.Mandos"
1104
1105
@dbus.service.signal(_interface, signature="oa{sv}")
1106
def ClientAdded(self, objpath, properties):
1107
"D-Bus signal"
1108
pass
1109
1110
@dbus.service.signal(_interface, signature="os")
1111
def ClientRemoved(self, objpath, name):
1112
"D-Bus signal"
1113
pass
1114
1115
@dbus.service.method(_interface, out_signature="ao")
1116
def GetAllClients(self):
1117
return dbus.Array(c.dbus_object_path for c in clients)
1118
1119
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1120
def GetAllClientsWithProperties(self):
1121
return dbus.Dictionary(
1122
((c.dbus_object_path, c.GetAllProperties())
1123
for c in clients),
1124
signature="oa{sv}")
1125
1126
@dbus.service.method(_interface, in_signature="o")
1127
def RemoveClient(self, object_path):
1128
for c in clients:
1129
if c.dbus_object_path == object_path:
1130
clients.remove(c)
1131
# Don't signal anything except ClientRemoved
1132
c.use_dbus = False
1133
c.disable()
1134
# Emit D-Bus signal
1135
self.ClientRemoved(object_path, c.name)
1136
return
1137
raise KeyError
1138
1139
del _interface
1140
1141
mandos_server = MandosServer()
1142
1143
for client in clients:
1144
if use_dbus:
1145
# Emit D-Bus signal
1146
mandos_server.ClientAdded(client.dbus_object_path,
1147
client.GetAllProperties())
1148
client.enable()
1149
1150
tcp_server.enable()
1151
tcp_server.server_activate()
1152
1153
# Find out what port we got
1154
service.port = tcp_server.socket.getsockname()[1]
1155
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1156
u" scope_id %d" % tcp_server.socket.getsockname())
1157
1158
#service.interface = tcp_server.socket.getsockname()[3]
1159
1160
try:
1161
# From the Avahi example code
1162
server.connect_to_signal("StateChanged", server_state_changed)
1163
try:
1164
server_state_changed(server.GetState())
1165
except dbus.exceptions.DBusException, error:
1166
logger.critical(u"DBusException: %s", error)
1167
sys.exit(1)
1168
# End of Avahi example code
1169
1170
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1171
lambda *args, **kwargs:
1172
(tcp_server.handle_request
1173
(*args[2:], **kwargs) or True))
1174
1175
logger.debug(u"Starting main loop")
1176
main_loop.run()
1177
except AvahiError, error:
1178
logger.critical(u"AvahiError: %s", error)
1179
sys.exit(1)
1180
except KeyboardInterrupt:
1181
if debug:
1182
print
1183
1184
if __name__ == '__main__':
142
parser.add_option("--dh", type="int", metavar="BITS",
143
help="DH group to use")
144
parser.add_option("-t", "--timeout", type="string", # Parsed later
145
default="15m",
146
help="Amount of downtime allowed for clients")
147
(options, args) = parser.parse_args()
148
149
# Parse the time argument
150
try:
151
suffix=options.timeout[-1]
152
value=int(options.timeout[:-1])
153
if suffix == "d":
154
options.timeout = datetime.timedelta(value)
155
elif suffix == "s":
156
options.timeout = datetime.timedelta(0, value)
157
elif suffix == "m":
158
options.timeout = datetime.timedelta(0, 0, 0, 0, value)
159
elif suffix == "h":
160
options.timeout = datetime.timedelta(0, 0, 0, 0, 0, value)
161
elif suffix == "w":
162
options.timeout = datetime.timedelta(0, 0, 0, 0, 0, 0,
163
value)
164
else:
165
raise ValueError
166
except (ValueError, IndexError):
167
parser.error("option --timeout: Unparseable time")
168
169
cert = gnutls.crypto.X509Certificate(open(options.cert).read())
170
key = gnutls.crypto.X509PrivateKey(open(options.key).read())
171
ca = gnutls.crypto.X509Certificate(open(options.ca).read())
172
crl = gnutls.crypto.X509CRL(open(options.crl).read())
173
cred = gnutls.connection.X509Credentials(cert, key, [ca], [crl])
174
175
# Parse config file
176
defaults = {}
177
client_config_object = ConfigParser.SafeConfigParser(defaults)
178
client_config_object.read("mandos-clients.conf")
179
clients = [Client(name=section,
180
**(dict(client_config_object.items(section))))
181
for section in client_config_object.sections()]
182
183
udp_server = IPv6_UDPServer((in6addr_any, options.port),
184
udp_handler,
185
options=options)
186
187
tcp_server = IPv6_TCPServer((in6addr_any, options.port),
188
tcp_handler,
189
options=options,
190
clients=clients,
191
credentials=cred)
192
193
while True:
194
in_, out, err = select.select((udp_server,
195
tcp_server), (), ())
196
for server in in_:
197
server.handle_request()
198
199
200
if __name__ == "__main__":
1185
201
main()
202
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0