2
# -*- mode: python; coding: utf-8 -*-
4
# Mandos server - give out binary blobs to connecting clients.
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", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
14
# Copyright © 2008-2016 Teddy Hogeborn
15
# Copyright © 2008-2016 Björn Påhlsson
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.
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.
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/>.
31
# Contact the authors at <mandos@recompile.se>.
34
from __future__ import (division, absolute_import, print_function,
38
from future_builtins import *
43
import SocketServer as socketserver
3
from __future__ import division
8
from optparse import OptionParser
51
import ConfigParser as configparser
12
import gnutls.connection
62
import logging.handlers
69
import cPickle as pickle
72
import multiprocessing
82
from gi.repository import GLib
83
from dbus.mainloop.glib import DBusGMainLoop
86
import xml.dom.minidom
89
# Try to find the value of SO_BINDTODEVICE:
91
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
92
# newer, and it is also the most natural place for it:
93
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
94
except AttributeError:
96
# This is where SO_BINDTODEVICE was up to and including Python
98
from IN import SO_BINDTODEVICE
100
# In Python 2.7 it seems to have been removed entirely.
101
# Try running the C preprocessor:
103
cc = subprocess.Popen(["cc", "--language=c", "-E",
105
stdin=subprocess.PIPE,
106
stdout=subprocess.PIPE)
107
stdout = cc.communicate(
108
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
109
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
110
except (OSError, ValueError, IndexError):
112
SO_BINDTODEVICE = None
114
if sys.version_info.major == 2:
118
stored_state_file = "clients.pickle"
120
logger = logging.getLogger()
124
if_nametoindex = ctypes.cdll.LoadLibrary(
125
ctypes.util.find_library("c")).if_nametoindex
126
except (OSError, AttributeError):
128
def if_nametoindex(interface):
129
"Get an interface index the hard way, i.e. using fcntl()"
130
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
131
with contextlib.closing(socket.socket()) as s:
132
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
133
struct.pack(b"16s16x", interface))
134
interface_index = struct.unpack("I", ifreq[16:20])[0]
135
return interface_index
138
def copy_function(func):
139
"""Make a copy of a function"""
140
if sys.version_info.major == 2:
141
return types.FunctionType(func.func_code,
147
return types.FunctionType(func.__code__,
154
def initlogger(debug, level=logging.WARNING):
155
"""init logger and add loglevel"""
158
syslogger = (logging.handlers.SysLogHandler(
159
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
160
address = "/dev/log"))
161
syslogger.setFormatter(logging.Formatter
162
('Mandos [%(process)d]: %(levelname)s:'
164
logger.addHandler(syslogger)
167
console = logging.StreamHandler()
168
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
172
logger.addHandler(console)
173
logger.setLevel(level)
176
class PGPError(Exception):
177
"""Exception if encryption/decryption fails"""
181
class PGPEngine(object):
182
"""A simple class for OpenPGP symmetric encryption & decryption"""
185
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
188
output = subprocess.check_output(["gpgconf"])
189
for line in output.splitlines():
190
name, text, path = line.split(b":")
195
if e.errno != errno.ENOENT:
197
self.gnupgargs = ['--batch',
198
'--homedir', self.tempdir,
201
# Only GPG version 1 has the --no-use-agent option.
202
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
203
self.gnupgargs.append("--no-use-agent")
208
def __exit__(self, exc_type, exc_value, traceback):
216
if self.tempdir is not None:
217
# Delete contents of tempdir
218
for root, dirs, files in os.walk(self.tempdir,
220
for filename in files:
221
os.remove(os.path.join(root, filename))
223
os.rmdir(os.path.join(root, dirname))
225
os.rmdir(self.tempdir)
228
def password_encode(self, password):
229
# Passphrase can not be empty and can not contain newlines or
230
# NUL bytes. So we prefix it and hex encode it.
231
encoded = b"mandos" + binascii.hexlify(password)
232
if len(encoded) > 2048:
233
# GnuPG can't handle long passwords, so encode differently
234
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
235
.replace(b"\n", b"\\n")
236
.replace(b"\0", b"\\x00"))
239
def encrypt(self, data, password):
240
passphrase = self.password_encode(password)
241
with tempfile.NamedTemporaryFile(
242
dir=self.tempdir) as passfile:
243
passfile.write(passphrase)
245
proc = subprocess.Popen([self.gpg, '--symmetric',
249
stdin = subprocess.PIPE,
250
stdout = subprocess.PIPE,
251
stderr = subprocess.PIPE)
252
ciphertext, err = proc.communicate(input = data)
253
if proc.returncode != 0:
257
def decrypt(self, data, password):
258
passphrase = self.password_encode(password)
259
with tempfile.NamedTemporaryFile(
260
dir = self.tempdir) as passfile:
261
passfile.write(passphrase)
263
proc = subprocess.Popen([self.gpg, '--decrypt',
267
stdin = subprocess.PIPE,
268
stdout = subprocess.PIPE,
269
stderr = subprocess.PIPE)
270
decrypted_plaintext, err = proc.communicate(input = data)
271
if proc.returncode != 0:
273
return decrypted_plaintext
275
# Pretend that we have an Avahi module
277
"""This isn't so much a class as it is a module-like namespace.
278
It is instantiated once, and simulates having an Avahi module."""
279
IF_UNSPEC = -1 # avahi-common/address.h
280
PROTO_UNSPEC = -1 # avahi-common/address.h
281
PROTO_INET = 0 # avahi-common/address.h
282
PROTO_INET6 = 1 # avahi-common/address.h
283
DBUS_NAME = "org.freedesktop.Avahi"
284
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
285
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
286
DBUS_PATH_SERVER = "/"
287
def string_array_to_txt_array(self, t):
288
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
289
for s in t), signature="ay")
290
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
291
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
292
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
293
SERVER_INVALID = 0 # avahi-common/defs.h
294
SERVER_REGISTERING = 1 # avahi-common/defs.h
295
SERVER_RUNNING = 2 # avahi-common/defs.h
296
SERVER_COLLISION = 3 # avahi-common/defs.h
297
SERVER_FAILURE = 4 # avahi-common/defs.h
300
class AvahiError(Exception):
301
def __init__(self, value, *args, **kwargs):
303
return super(AvahiError, self).__init__(value, *args,
307
class AvahiServiceError(AvahiError):
311
class AvahiGroupError(AvahiError):
315
class AvahiService(object):
316
"""An Avahi (Zeroconf) service.
319
interface: integer; avahi.IF_UNSPEC or an interface index.
320
Used to optionally bind to the specified interface.
321
name: string; Example: 'Mandos'
322
type: string; Example: '_mandos._tcp'.
323
See <https://www.iana.org/assignments/service-names-port-numbers>
324
port: integer; what port to announce
325
TXT: list of strings; TXT record for the service
326
domain: string; Domain to publish on, default to .local if empty.
327
host: string; Host to publish records for, default is localhost
328
max_renames: integer; maximum number of renames
329
rename_count: integer; counter so we only rename after collisions
330
a sensible number of times
331
group: D-Bus Entry Group
333
bus: dbus.SystemBus()
337
interface = avahi.IF_UNSPEC,
345
protocol = avahi.PROTO_UNSPEC,
347
self.interface = interface
349
self.type = servicetype
351
self.TXT = TXT if TXT is not None else []
354
self.rename_count = 0
355
self.max_renames = max_renames
356
self.protocol = protocol
357
self.group = None # our entry group
360
self.entry_group_state_changed_match = None
362
def rename(self, remove=True):
363
"""Derived from the Avahi example code"""
364
if self.rename_count >= self.max_renames:
365
logger.critical("No suitable Zeroconf service name found"
366
" after %i retries, exiting.",
368
raise AvahiServiceError("Too many renames")
370
self.server.GetAlternativeServiceName(self.name))
371
self.rename_count += 1
372
logger.info("Changing Zeroconf service name to %r ...",
378
except dbus.exceptions.DBusException as error:
379
if (error.get_dbus_name()
380
== "org.freedesktop.Avahi.CollisionError"):
381
logger.info("Local Zeroconf service name collision.")
382
return self.rename(remove=False)
384
logger.critical("D-Bus Exception", exc_info=error)
389
"""Derived from the Avahi example code"""
390
if self.entry_group_state_changed_match is not None:
391
self.entry_group_state_changed_match.remove()
392
self.entry_group_state_changed_match = None
393
if self.group is not None:
397
"""Derived from the Avahi example code"""
399
if self.group is None:
400
self.group = dbus.Interface(
401
self.bus.get_object(avahi.DBUS_NAME,
402
self.server.EntryGroupNew()),
403
avahi.DBUS_INTERFACE_ENTRY_GROUP)
404
self.entry_group_state_changed_match = (
405
self.group.connect_to_signal(
406
'StateChanged', self.entry_group_state_changed))
407
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
408
self.name, self.type)
409
self.group.AddService(
412
dbus.UInt32(0), # flags
413
self.name, self.type,
414
self.domain, self.host,
415
dbus.UInt16(self.port),
416
avahi.string_array_to_txt_array(self.TXT))
419
def entry_group_state_changed(self, state, error):
420
"""Derived from the Avahi example code"""
421
logger.debug("Avahi entry group state change: %i", state)
423
if state == avahi.ENTRY_GROUP_ESTABLISHED:
424
logger.debug("Zeroconf service established.")
425
elif state == avahi.ENTRY_GROUP_COLLISION:
426
logger.info("Zeroconf service name collision.")
428
elif state == avahi.ENTRY_GROUP_FAILURE:
429
logger.critical("Avahi: Error in group state changed %s",
431
raise AvahiGroupError("State changed: {!s}".format(error))
434
"""Derived from the Avahi example code"""
435
if self.group is not None:
438
except (dbus.exceptions.UnknownMethodException,
439
dbus.exceptions.DBusException):
444
def server_state_changed(self, state, error=None):
445
"""Derived from the Avahi example code"""
446
logger.debug("Avahi server state change: %i", state)
448
avahi.SERVER_INVALID: "Zeroconf server invalid",
449
avahi.SERVER_REGISTERING: None,
450
avahi.SERVER_COLLISION: "Zeroconf server name collision",
451
avahi.SERVER_FAILURE: "Zeroconf server failure",
453
if state in bad_states:
454
if bad_states[state] is not None:
456
logger.error(bad_states[state])
458
logger.error(bad_states[state] + ": %r", error)
460
elif state == avahi.SERVER_RUNNING:
463
except dbus.exceptions.DBusException as error:
464
if (error.get_dbus_name()
465
== "org.freedesktop.Avahi.CollisionError"):
466
logger.info("Local Zeroconf service name"
468
return self.rename(remove=False)
470
logger.critical("D-Bus Exception", exc_info=error)
475
logger.debug("Unknown state: %r", state)
477
logger.debug("Unknown state: %r: %r", state, error)
480
"""Derived from the Avahi example code"""
481
if self.server is None:
482
self.server = dbus.Interface(
483
self.bus.get_object(avahi.DBUS_NAME,
484
avahi.DBUS_PATH_SERVER,
485
follow_name_owner_changes=True),
486
avahi.DBUS_INTERFACE_SERVER)
487
self.server.connect_to_signal("StateChanged",
488
self.server_state_changed)
489
self.server_state_changed(self.server.GetState())
492
class AvahiServiceToSyslog(AvahiService):
493
def rename(self, *args, **kwargs):
494
"""Add the new name to the syslog messages"""
495
ret = AvahiService.rename(self, *args, **kwargs)
496
syslogger.setFormatter(logging.Formatter(
497
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
501
# Pretend that we have a GnuTLS module
502
class GnuTLS(object):
503
"""This isn't so much a class as it is a module-like namespace.
504
It is instantiated once, and simulates having a GnuTLS module."""
506
_library = ctypes.cdll.LoadLibrary(
507
ctypes.util.find_library("gnutls"))
508
_need_version = b"3.3.0"
510
# Need to use class name "GnuTLS" here, since this method is
511
# called before the assignment to the "gnutls" global variable
513
if GnuTLS.check_version(self._need_version) is None:
514
raise GnuTLS.Error("Needs GnuTLS {} or later"
515
.format(self._need_version))
517
# Unless otherwise indicated, the constants and types below are
518
# all from the gnutls/gnutls.h C header file.
528
E_NO_CERTIFICATE_FOUND = -49
529
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
532
class session_int(ctypes.Structure):
534
session_t = ctypes.POINTER(session_int)
535
class certificate_credentials_st(ctypes.Structure):
537
certificate_credentials_t = ctypes.POINTER(
538
certificate_credentials_st)
539
certificate_type_t = ctypes.c_int
540
class datum_t(ctypes.Structure):
541
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
542
('size', ctypes.c_uint)]
543
class openpgp_crt_int(ctypes.Structure):
545
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
546
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
547
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
548
credentials_type_t = ctypes.c_int
549
transport_ptr_t = ctypes.c_void_p
550
close_request_t = ctypes.c_int
553
class Error(Exception):
554
# We need to use the class name "GnuTLS" here, since this
555
# exception might be raised from within GnuTLS.__init__,
556
# which is called before the assignment to the "gnutls"
557
# global variable has happened.
558
def __init__(self, message = None, code = None, args=()):
559
# Default usage is by a message string, but if a return
560
# code is passed, convert it to a string with
563
if message is None and code is not None:
564
message = GnuTLS.strerror(code)
565
return super(GnuTLS.Error, self).__init__(
568
class CertificateSecurityError(Error):
572
class Credentials(object):
574
self._c_object = gnutls.certificate_credentials_t()
575
gnutls.certificate_allocate_credentials(
576
ctypes.byref(self._c_object))
577
self.type = gnutls.CRD_CERTIFICATE
580
gnutls.certificate_free_credentials(self._c_object)
582
class ClientSession(object):
583
def __init__(self, socket, credentials = None):
584
self._c_object = gnutls.session_t()
585
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
586
gnutls.set_default_priority(self._c_object)
587
gnutls.transport_set_ptr(self._c_object, socket.fileno())
588
gnutls.handshake_set_private_extensions(self._c_object,
591
if credentials is None:
592
credentials = gnutls.Credentials()
593
gnutls.credentials_set(self._c_object, credentials.type,
594
ctypes.cast(credentials._c_object,
596
self.credentials = credentials
599
gnutls.deinit(self._c_object)
602
return gnutls.handshake(self._c_object)
604
def send(self, data):
608
data_len -= gnutls.record_send(self._c_object,
613
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
615
# Error handling functions
616
def _error_code(result):
617
"""A function to raise exceptions on errors, suitable
618
for the 'restype' attribute on ctypes functions"""
621
if result == gnutls.E_NO_CERTIFICATE_FOUND:
622
raise gnutls.CertificateSecurityError(code = result)
623
raise gnutls.Error(code = result)
625
def _retry_on_error(result, func, arguments):
626
"""A function to retry on some errors, suitable
627
for the 'errcheck' attribute on ctypes functions"""
629
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
630
return _error_code(result)
631
result = func(*arguments)
634
# Unless otherwise indicated, the function declarations below are
635
# all from the gnutls/gnutls.h C header file.
638
priority_set_direct = _library.gnutls_priority_set_direct
639
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
640
ctypes.POINTER(ctypes.c_char_p)]
641
priority_set_direct.restype = _error_code
643
init = _library.gnutls_init
644
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
645
init.restype = _error_code
647
set_default_priority = _library.gnutls_set_default_priority
648
set_default_priority.argtypes = [session_t]
649
set_default_priority.restype = _error_code
651
record_send = _library.gnutls_record_send
652
record_send.argtypes = [session_t, ctypes.c_void_p,
654
record_send.restype = ctypes.c_ssize_t
655
record_send.errcheck = _retry_on_error
657
certificate_allocate_credentials = (
658
_library.gnutls_certificate_allocate_credentials)
659
certificate_allocate_credentials.argtypes = [
660
ctypes.POINTER(certificate_credentials_t)]
661
certificate_allocate_credentials.restype = _error_code
663
certificate_free_credentials = (
664
_library.gnutls_certificate_free_credentials)
665
certificate_free_credentials.argtypes = [certificate_credentials_t]
666
certificate_free_credentials.restype = None
668
handshake_set_private_extensions = (
669
_library.gnutls_handshake_set_private_extensions)
670
handshake_set_private_extensions.argtypes = [session_t,
672
handshake_set_private_extensions.restype = None
674
credentials_set = _library.gnutls_credentials_set
675
credentials_set.argtypes = [session_t, credentials_type_t,
677
credentials_set.restype = _error_code
679
strerror = _library.gnutls_strerror
680
strerror.argtypes = [ctypes.c_int]
681
strerror.restype = ctypes.c_char_p
683
certificate_type_get = _library.gnutls_certificate_type_get
684
certificate_type_get.argtypes = [session_t]
685
certificate_type_get.restype = _error_code
687
certificate_get_peers = _library.gnutls_certificate_get_peers
688
certificate_get_peers.argtypes = [session_t,
689
ctypes.POINTER(ctypes.c_uint)]
690
certificate_get_peers.restype = ctypes.POINTER(datum_t)
692
global_set_log_level = _library.gnutls_global_set_log_level
693
global_set_log_level.argtypes = [ctypes.c_int]
694
global_set_log_level.restype = None
696
global_set_log_function = _library.gnutls_global_set_log_function
697
global_set_log_function.argtypes = [log_func]
698
global_set_log_function.restype = None
700
deinit = _library.gnutls_deinit
701
deinit.argtypes = [session_t]
702
deinit.restype = None
704
handshake = _library.gnutls_handshake
705
handshake.argtypes = [session_t]
706
handshake.restype = _error_code
707
handshake.errcheck = _retry_on_error
709
transport_set_ptr = _library.gnutls_transport_set_ptr
710
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
711
transport_set_ptr.restype = None
713
bye = _library.gnutls_bye
714
bye.argtypes = [session_t, close_request_t]
715
bye.restype = _error_code
716
bye.errcheck = _retry_on_error
718
check_version = _library.gnutls_check_version
719
check_version.argtypes = [ctypes.c_char_p]
720
check_version.restype = ctypes.c_char_p
722
# All the function declarations below are from gnutls/openpgp.h
724
openpgp_crt_init = _library.gnutls_openpgp_crt_init
725
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
726
openpgp_crt_init.restype = _error_code
728
openpgp_crt_import = _library.gnutls_openpgp_crt_import
729
openpgp_crt_import.argtypes = [openpgp_crt_t,
730
ctypes.POINTER(datum_t),
732
openpgp_crt_import.restype = _error_code
734
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
735
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
736
ctypes.POINTER(ctypes.c_uint)]
737
openpgp_crt_verify_self.restype = _error_code
739
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
740
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
741
openpgp_crt_deinit.restype = None
743
openpgp_crt_get_fingerprint = (
744
_library.gnutls_openpgp_crt_get_fingerprint)
745
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
749
openpgp_crt_get_fingerprint.restype = _error_code
751
# Remove non-public functions
752
del _error_code, _retry_on_error
753
# Create the global "gnutls" object, simulating a module
756
def call_pipe(connection, # : multiprocessing.Connection
757
func, *args, **kwargs):
758
"""This function is meant to be called by multiprocessing.Process
760
This function runs func(*args, **kwargs), and writes the resulting
761
return value on the provided multiprocessing.Connection.
763
connection.send(func(*args, **kwargs))
766
22
class Client(object):
767
"""A representation of a client host served by this server.
770
approved: bool(); 'None' if not yet approved/disapproved
771
approval_delay: datetime.timedelta(); Time to wait for approval
772
approval_duration: datetime.timedelta(); Duration of one approval
773
checker: subprocess.Popen(); a running checker process used
774
to see if the client lives.
775
'None' if no process is running.
776
checker_callback_tag: a GLib event source tag, or None
777
checker_command: string; External command which is run to check
778
if client lives. %() expansions are done at
779
runtime with vars(self) as dict, so that for
780
instance %(name)s can be used in the command.
781
checker_initiator_tag: a GLib event source tag, or None
782
created: datetime.datetime(); (UTC) object creation
783
client_structure: Object describing what attributes a client has
784
and is used for storing the client at exit
785
current_checker_command: string; current running checker_command
786
disable_initiator_tag: a GLib event source tag, or None
788
fingerprint: string (40 or 32 hexadecimal digits); used to
789
uniquely identify the client
790
host: string; available for use by the checker command
791
interval: datetime.timedelta(); How often to start a new checker
792
last_approval_request: datetime.datetime(); (UTC) or None
793
last_checked_ok: datetime.datetime(); (UTC) or None
794
last_checker_status: integer between 0 and 255 reflecting exit
795
status of last checker. -1 reflects crashed
796
checker, -2 means no checker completed yet.
797
last_checker_signal: The signal which killed the last checker, if
798
last_checker_status is -1
799
last_enabled: datetime.datetime(); (UTC) or None
800
name: string; from the config file, used in log messages and
802
secret: bytestring; sent verbatim (over TLS) to client
803
timeout: datetime.timedelta(); How long from last_checked_ok
804
until this client is disabled
805
extended_timeout: extra long timeout when secret has been sent
806
runtime_expansions: Allowed attributes for runtime expansion.
807
expires: datetime.datetime(); time (UTC) when a client will be
809
server_settings: The server_settings dict from main()
812
runtime_expansions = ("approval_delay", "approval_duration",
813
"created", "enabled", "expires",
814
"fingerprint", "host", "interval",
815
"last_approval_request", "last_checked_ok",
816
"last_enabled", "name", "timeout")
819
"extended_timeout": "PT15M",
821
"checker": "fping -q -- %%(host)s",
823
"approval_delay": "PT0S",
824
"approval_duration": "PT1S",
825
"approved_by_default": "True",
830
def config_parser(config):
831
"""Construct a new dict of client settings of this form:
832
{ client_name: {setting_name: value, ...}, ...}
833
with exceptions for any special settings as defined above.
834
NOTE: Must be a pure function. Must return the same result
835
value given the same arguments.
838
for client_name in config.sections():
839
section = dict(config.items(client_name))
840
client = settings[client_name] = {}
842
client["host"] = section["host"]
843
# Reformat values from string types to Python types
844
client["approved_by_default"] = config.getboolean(
845
client_name, "approved_by_default")
846
client["enabled"] = config.getboolean(client_name,
849
# Uppercase and remove spaces from fingerprint for later
850
# comparison purposes with return value from the
851
# fingerprint() function
852
client["fingerprint"] = (section["fingerprint"].upper()
854
if "secret" in section:
855
client["secret"] = codecs.decode(section["secret"]
858
elif "secfile" in section:
859
with open(os.path.expanduser(os.path.expandvars
860
(section["secfile"])),
862
client["secret"] = secfile.read()
864
raise TypeError("No secret or secfile for section {}"
866
client["timeout"] = string_to_delta(section["timeout"])
867
client["extended_timeout"] = string_to_delta(
868
section["extended_timeout"])
869
client["interval"] = string_to_delta(section["interval"])
870
client["approval_delay"] = string_to_delta(
871
section["approval_delay"])
872
client["approval_duration"] = string_to_delta(
873
section["approval_duration"])
874
client["checker_command"] = section["checker"]
875
client["last_approval_request"] = None
876
client["last_checked_ok"] = None
877
client["last_checker_status"] = -2
881
def __init__(self, settings, name = None, server_settings=None):
23
def __init__(self, name=None, options=None, dn=None,
24
password=None, passfile=None, fqdn=None,
25
timeout=None, interval=-1):
883
if server_settings is None:
885
self.server_settings = server_settings
886
# adding all client settings
887
for setting, value in settings.items():
888
setattr(self, setting, value)
891
if not hasattr(self, "last_enabled"):
892
self.last_enabled = datetime.datetime.utcnow()
893
if not hasattr(self, "expires"):
894
self.expires = (datetime.datetime.utcnow()
897
self.last_enabled = None
900
logger.debug("Creating client %r", self.name)
901
logger.debug(" Fingerprint: %s", self.fingerprint)
902
self.created = settings.get("created",
903
datetime.datetime.utcnow())
905
# attributes specific for this server instance
907
self.checker_initiator_tag = None
908
self.disable_initiator_tag = None
909
self.checker_callback_tag = None
910
self.current_checker_command = None
912
self.approvals_pending = 0
913
self.changedstate = multiprocessing_manager.Condition(
914
multiprocessing_manager.Lock())
915
self.client_structure = [attr
916
for attr in self.__dict__.keys()
917
if not attr.startswith("_")]
918
self.client_structure.append("client_structure")
920
for name, t in inspect.getmembers(
921
type(self), lambda obj: isinstance(obj, property)):
922
if not name.startswith("_"):
923
self.client_structure.append(name)
925
# Send notice to process children that client state has changed
926
def send_changedstate(self):
927
with self.changedstate:
928
self.changedstate.notify_all()
931
"""Start this client's checker and timeout hooks"""
932
if getattr(self, "enabled", False):
935
self.expires = datetime.datetime.utcnow() + self.timeout
937
self.last_enabled = datetime.datetime.utcnow()
939
self.send_changedstate()
941
def disable(self, quiet=True):
942
"""Disable this client."""
943
if not getattr(self, "enabled", False):
946
logger.info("Disabling client %s", self.name)
947
if getattr(self, "disable_initiator_tag", None) is not None:
948
GLib.source_remove(self.disable_initiator_tag)
949
self.disable_initiator_tag = None
951
if getattr(self, "checker_initiator_tag", None) is not None:
952
GLib.source_remove(self.checker_initiator_tag)
953
self.checker_initiator_tag = None
957
self.send_changedstate()
958
# Do not run this again if called by a GLib.timeout_add
964
def init_checker(self):
965
# Schedule a new checker to be started an 'interval' from now,
966
# and every interval from then on.
967
if self.checker_initiator_tag is not None:
968
GLib.source_remove(self.checker_initiator_tag)
969
self.checker_initiator_tag = GLib.timeout_add(
970
int(self.interval.total_seconds() * 1000),
972
# Schedule a disable() when 'timeout' has passed
973
if self.disable_initiator_tag is not None:
974
GLib.source_remove(self.disable_initiator_tag)
975
self.disable_initiator_tag = GLib.timeout_add(
976
int(self.timeout.total_seconds() * 1000), self.disable)
977
# Also start a new checker *right now*.
980
def checker_callback(self, source, condition, connection,
982
"""The checker has completed, so take appropriate actions."""
983
self.checker_callback_tag = None
985
# Read return code from connection (see call_pipe)
986
returncode = connection.recv()
990
self.last_checker_status = returncode
991
self.last_checker_signal = None
992
if self.last_checker_status == 0:
993
logger.info("Checker for %(name)s succeeded",
997
logger.info("Checker for %(name)s failed", vars(self))
999
self.last_checker_status = -1
1000
self.last_checker_signal = -returncode
1001
logger.warning("Checker for %(name)s crashed?",
1005
def checked_ok(self):
1006
"""Assert that the client has been seen, alive and well."""
1007
self.last_checked_ok = datetime.datetime.utcnow()
1008
self.last_checker_status = 0
1009
self.last_checker_signal = None
1012
def bump_timeout(self, timeout=None):
1013
"""Bump up the timeout for this client."""
29
self.password = password
31
self.password = open(passfile).readall()
33
print "No Password or Passfile in client config file"
34
# raise RuntimeError XXX
35
self.password = "gazonk"
36
self.fqdn = fqdn # string
37
self.created = datetime.datetime.now()
38
self.last_seen = None # datetime.datetime()
1014
39
if timeout is None:
1015
timeout = self.timeout
1016
if self.disable_initiator_tag is not None:
1017
GLib.source_remove(self.disable_initiator_tag)
1018
self.disable_initiator_tag = None
1019
if getattr(self, "enabled", False):
1020
self.disable_initiator_tag = GLib.timeout_add(
1021
int(timeout.total_seconds() * 1000), self.disable)
1022
self.expires = datetime.datetime.utcnow() + timeout
1024
def need_approval(self):
1025
self.last_approval_request = datetime.datetime.utcnow()
40
timeout = options.timeout
41
self.timeout = timeout # datetime.timedelta()
43
interval = options.interval
45
interval = string_to_delta(interval)
46
self.interval = interval # datetime.timedelta()
47
self.next_check = datetime.datetime.now() # datetime.datetime()
48
# Note: next_check may be in the past if checker is not None
49
self.checker = None # or a subprocess.Popen()
50
def check_action(self):
51
"""The checker said something and might have completed.
52
Check if is has, and take appropriate actions."""
53
if self.checker.poll() is None:
54
# False alarm, no result yet
56
#print "Checker for %(name)s said nothing?" % vars(self)
58
now = datetime.datetime.now()
59
if self.checker.returncode == 0:
60
print "Checker for %(name)s succeeded" % vars(self)
63
print "Checker for %(name)s failed" % vars(self)
64
while self.next_check <= now:
65
self.next_check += self.interval
67
handle_request = check_action
1027
68
def start_checker(self):
1028
"""Start a new checker subprocess if one is not running.
1030
If a checker already exists, leave it running and do
1032
# The reason for not killing a running checker is that if we
1033
# did that, and if a checker (for some reason) started running
1034
# slowly and taking more than 'interval' time, then the client
1035
# would inevitably timeout, since no checker would get a
1036
# chance to run to completion. If we instead leave running
1037
# checkers alone, the checker would have to take more time
1038
# than 'timeout' for the client to be disabled, which is as it
1041
if self.checker is not None and not self.checker.is_alive():
1042
logger.warning("Checker was not alive; joining")
1045
# Start a new checker if needed
1046
if self.checker is None:
1047
# Escape attributes for the shell
1049
attr: re.escape(str(getattr(self, attr)))
1050
for attr in self.runtime_expansions }
1052
command = self.checker_command % escaped_attrs
1053
except TypeError as error:
1054
logger.error('Could not format string "%s"',
1055
self.checker_command,
1057
return True # Try again later
1058
self.current_checker_command = command
1059
logger.info("Starting checker %r for %s", command,
1061
# We don't need to redirect stdout and stderr, since
1062
# in normal mode, that is already done by daemon(),
1063
# and in debug mode we don't want to. (Stdin is
1064
# always replaced by /dev/null.)
1065
# The exception is when not debugging but nevertheless
1066
# running in the foreground; use the previously
1068
popen_args = { "close_fds": True,
1071
if (not self.server_settings["debug"]
1072
and self.server_settings["foreground"]):
1073
popen_args.update({"stdout": wnull,
1075
pipe = multiprocessing.Pipe(duplex = False)
1076
self.checker = multiprocessing.Process(
1078
args = (pipe[1], subprocess.call, command),
1079
kwargs = popen_args)
1080
self.checker.start()
1081
self.checker_callback_tag = GLib.io_add_watch(
1082
pipe[0].fileno(), GLib.IO_IN,
1083
self.checker_callback, pipe[0], command)
1084
# Re-run this periodically if run by GLib.timeout_add
71
self.checker = subprocess.Popen("sleep 10; fping -q -- %s"
72
% re.escape(self.fqdn),
73
stdout=subprocess.PIPE,
76
except subprocess.OSError, e:
77
print "Failed to start subprocess:", e
1087
78
def stop_checker(self):
1088
"""Force the checker process, if any, to stop."""
1089
if self.checker_callback_tag:
1090
GLib.source_remove(self.checker_callback_tag)
1091
self.checker_callback_tag = None
1092
if getattr(self, "checker", None) is None:
79
if self.checker is None:
1094
logger.debug("Stopping checker for %(name)s", vars(self))
1095
self.checker.terminate()
81
os.kill(self.checker.pid, signal.SIGTERM)
82
if self.checker.poll() is None:
83
os.kill(self.checker.pid, signal.SIGKILL)
1096
84
self.checker = None
1099
def dbus_service_property(dbus_interface,
1103
"""Decorators for marking methods of a DBusObjectWithProperties to
1104
become properties on the D-Bus.
1106
The decorated method will be called with no arguments by "Get"
1107
and with one argument by "Set".
1109
The parameters, where they are supported, are the same as
1110
dbus.service.method, except there is only "signature", since the
1111
type from Get() and the type sent to Set() is the same.
1113
# Encoding deeply encoded byte arrays is not supported yet by the
1114
# "Set" method, so we fail early here:
1115
if byte_arrays and signature != "ay":
1116
raise ValueError("Byte arrays not supported for non-'ay'"
1117
" signature {!r}".format(signature))
1119
def decorator(func):
1120
func._dbus_is_property = True
1121
func._dbus_interface = dbus_interface
1122
func._dbus_signature = signature
1123
func._dbus_access = access
1124
func._dbus_name = func.__name__
1125
if func._dbus_name.endswith("_dbus_property"):
1126
func._dbus_name = func._dbus_name[:-14]
1127
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
1133
def dbus_interface_annotations(dbus_interface):
1134
"""Decorator for marking functions returning interface annotations
1138
@dbus_interface_annotations("org.example.Interface")
1139
def _foo(self): # Function name does not matter
1140
return {"org.freedesktop.DBus.Deprecated": "true",
1141
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1145
def decorator(func):
1146
func._dbus_is_interface = True
1147
func._dbus_interface = dbus_interface
1148
func._dbus_name = dbus_interface
1154
def dbus_annotations(annotations):
1155
"""Decorator to annotate D-Bus methods, signals or properties
1158
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1159
"org.freedesktop.DBus.Property."
1160
"EmitsChangedSignal": "false"})
1161
@dbus_service_property("org.example.Interface", signature="b",
1163
def Property_dbus_property(self):
1164
return dbus.Boolean(False)
1166
See also the DBusObjectWithAnnotations class.
1169
def decorator(func):
1170
func._dbus_annotations = annotations
1176
class DBusPropertyException(dbus.exceptions.DBusException):
1177
"""A base class for D-Bus property-related exceptions
1182
class DBusPropertyAccessException(DBusPropertyException):
1183
"""A property's access permissions disallows an operation.
1188
class DBusPropertyNotFound(DBusPropertyException):
1189
"""An attempt was made to access a non-existing property.
1194
class DBusObjectWithAnnotations(dbus.service.Object):
1195
"""A D-Bus object with annotations.
1197
Classes inheriting from this can use the dbus_annotations
1198
decorator to add annotations to methods or signals.
1202
def _is_dbus_thing(thing):
1203
"""Returns a function testing if an attribute is a D-Bus thing
1205
If called like _is_dbus_thing("method") it returns a function
1206
suitable for use as predicate to inspect.getmembers().
1208
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1211
def _get_all_dbus_things(self, thing):
1212
"""Returns a generator of (name, attribute) pairs
1214
return ((getattr(athing.__get__(self), "_dbus_name", name),
1215
athing.__get__(self))
1216
for cls in self.__class__.__mro__
1218
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1220
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1221
out_signature = "s",
1222
path_keyword = 'object_path',
1223
connection_keyword = 'connection')
1224
def Introspect(self, object_path, connection):
1225
"""Overloading of standard D-Bus method.
1227
Inserts annotation tags on methods and signals.
1229
xmlstring = dbus.service.Object.Introspect(self, object_path,
1232
document = xml.dom.minidom.parseString(xmlstring)
1234
for if_tag in document.getElementsByTagName("interface"):
1235
# Add annotation tags
1236
for typ in ("method", "signal"):
1237
for tag in if_tag.getElementsByTagName(typ):
1239
for name, prop in (self.
1240
_get_all_dbus_things(typ)):
1241
if (name == tag.getAttribute("name")
1242
and prop._dbus_interface
1243
== if_tag.getAttribute("name")):
1244
annots.update(getattr(
1245
prop, "_dbus_annotations", {}))
1246
for name, value in annots.items():
1247
ann_tag = document.createElement(
1249
ann_tag.setAttribute("name", name)
1250
ann_tag.setAttribute("value", value)
1251
tag.appendChild(ann_tag)
1252
# Add interface annotation tags
1253
for annotation, value in dict(
1254
itertools.chain.from_iterable(
1255
annotations().items()
1256
for name, annotations
1257
in self._get_all_dbus_things("interface")
1258
if name == if_tag.getAttribute("name")
1260
ann_tag = document.createElement("annotation")
1261
ann_tag.setAttribute("name", annotation)
1262
ann_tag.setAttribute("value", value)
1263
if_tag.appendChild(ann_tag)
1264
# Fix argument name for the Introspect method itself
1265
if (if_tag.getAttribute("name")
1266
== dbus.INTROSPECTABLE_IFACE):
1267
for cn in if_tag.getElementsByTagName("method"):
1268
if cn.getAttribute("name") == "Introspect":
1269
for arg in cn.getElementsByTagName("arg"):
1270
if (arg.getAttribute("direction")
1272
arg.setAttribute("name",
1274
xmlstring = document.toxml("utf-8")
1276
except (AttributeError, xml.dom.DOMException,
1277
xml.parsers.expat.ExpatError) as error:
1278
logger.error("Failed to override Introspection method",
1283
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1284
"""A D-Bus object with properties.
1286
Classes inheriting from this can use the dbus_service_property
1287
decorator to expose methods as D-Bus properties. It exposes the
1288
standard Get(), Set(), and GetAll() methods on the D-Bus.
1291
def _get_dbus_property(self, interface_name, property_name):
1292
"""Returns a bound method if one exists which is a D-Bus
1293
property with the specified name and interface.
1295
for cls in self.__class__.__mro__:
1296
for name, value in inspect.getmembers(
1297
cls, self._is_dbus_thing("property")):
1298
if (value._dbus_name == property_name
1299
and value._dbus_interface == interface_name):
1300
return value.__get__(self)
1303
raise DBusPropertyNotFound("{}:{}.{}".format(
1304
self.dbus_object_path, interface_name, property_name))
1307
def _get_all_interface_names(cls):
1308
"""Get a sequence of all interfaces supported by an object"""
1309
return (name for name in set(getattr(getattr(x, attr),
1310
"_dbus_interface", None)
1311
for x in (inspect.getmro(cls))
1313
if name is not None)
1315
@dbus.service.method(dbus.PROPERTIES_IFACE,
1318
def Get(self, interface_name, property_name):
1319
"""Standard D-Bus property Get() method, see D-Bus standard.
1321
prop = self._get_dbus_property(interface_name, property_name)
1322
if prop._dbus_access == "write":
1323
raise DBusPropertyAccessException(property_name)
1325
if not hasattr(value, "variant_level"):
1327
return type(value)(value, variant_level=value.variant_level+1)
1329
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1330
def Set(self, interface_name, property_name, value):
1331
"""Standard D-Bus property Set() method, see D-Bus standard.
1333
prop = self._get_dbus_property(interface_name, property_name)
1334
if prop._dbus_access == "read":
1335
raise DBusPropertyAccessException(property_name)
1336
if prop._dbus_get_args_options["byte_arrays"]:
1337
# The byte_arrays option is not supported yet on
1338
# signatures other than "ay".
1339
if prop._dbus_signature != "ay":
1340
raise ValueError("Byte arrays not supported for non-"
1341
"'ay' signature {!r}"
1342
.format(prop._dbus_signature))
1343
value = dbus.ByteArray(b''.join(chr(byte)
1347
@dbus.service.method(dbus.PROPERTIES_IFACE,
1349
out_signature="a{sv}")
1350
def GetAll(self, interface_name):
1351
"""Standard D-Bus property GetAll() method, see D-Bus
1354
Note: Will not include properties with access="write".
1357
for name, prop in self._get_all_dbus_things("property"):
1359
and interface_name != prop._dbus_interface):
1360
# Interface non-empty but did not match
1362
# Ignore write-only properties
1363
if prop._dbus_access == "write":
1366
if not hasattr(value, "variant_level"):
1367
properties[name] = value
1369
properties[name] = type(value)(
1370
value, variant_level = value.variant_level + 1)
1371
return dbus.Dictionary(properties, signature="sv")
1373
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1374
def PropertiesChanged(self, interface_name, changed_properties,
1375
invalidated_properties):
1376
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1381
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1383
path_keyword='object_path',
1384
connection_keyword='connection')
1385
def Introspect(self, object_path, connection):
1386
"""Overloading of standard D-Bus method.
1388
Inserts property tags and interface annotation tags.
1390
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1394
document = xml.dom.minidom.parseString(xmlstring)
1396
def make_tag(document, name, prop):
1397
e = document.createElement("property")
1398
e.setAttribute("name", name)
1399
e.setAttribute("type", prop._dbus_signature)
1400
e.setAttribute("access", prop._dbus_access)
1403
for if_tag in document.getElementsByTagName("interface"):
1405
for tag in (make_tag(document, name, prop)
1407
in self._get_all_dbus_things("property")
1408
if prop._dbus_interface
1409
== if_tag.getAttribute("name")):
1410
if_tag.appendChild(tag)
1411
# Add annotation tags for properties
1412
for tag in if_tag.getElementsByTagName("property"):
1414
for name, prop in self._get_all_dbus_things(
1416
if (name == tag.getAttribute("name")
1417
and prop._dbus_interface
1418
== if_tag.getAttribute("name")):
1419
annots.update(getattr(
1420
prop, "_dbus_annotations", {}))
1421
for name, value in annots.items():
1422
ann_tag = document.createElement(
1424
ann_tag.setAttribute("name", name)
1425
ann_tag.setAttribute("value", value)
1426
tag.appendChild(ann_tag)
1427
# Add the names to the return values for the
1428
# "org.freedesktop.DBus.Properties" methods
1429
if (if_tag.getAttribute("name")
1430
== "org.freedesktop.DBus.Properties"):
1431
for cn in if_tag.getElementsByTagName("method"):
1432
if cn.getAttribute("name") == "Get":
1433
for arg in cn.getElementsByTagName("arg"):
1434
if (arg.getAttribute("direction")
1436
arg.setAttribute("name", "value")
1437
elif cn.getAttribute("name") == "GetAll":
1438
for arg in cn.getElementsByTagName("arg"):
1439
if (arg.getAttribute("direction")
1441
arg.setAttribute("name", "props")
1442
xmlstring = document.toxml("utf-8")
1444
except (AttributeError, xml.dom.DOMException,
1445
xml.parsers.expat.ExpatError) as error:
1446
logger.error("Failed to override Introspection method",
1451
dbus.OBJECT_MANAGER_IFACE
1452
except AttributeError:
1453
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1455
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1456
"""A D-Bus object with an ObjectManager.
1458
Classes inheriting from this exposes the standard
1459
GetManagedObjects call and the InterfacesAdded and
1460
InterfacesRemoved signals on the standard
1461
"org.freedesktop.DBus.ObjectManager" interface.
1463
Note: No signals are sent automatically; they must be sent
1466
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1467
out_signature = "a{oa{sa{sv}}}")
1468
def GetManagedObjects(self):
1469
"""This function must be overridden"""
1470
raise NotImplementedError()
1472
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1473
signature = "oa{sa{sv}}")
1474
def InterfacesAdded(self, object_path, interfaces_and_properties):
1477
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1478
def InterfacesRemoved(self, object_path, interfaces):
1481
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1482
out_signature = "s",
1483
path_keyword = 'object_path',
1484
connection_keyword = 'connection')
1485
def Introspect(self, object_path, connection):
1486
"""Overloading of standard D-Bus method.
1488
Override return argument name of GetManagedObjects to be
1489
"objpath_interfaces_and_properties"
1491
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1495
document = xml.dom.minidom.parseString(xmlstring)
1497
for if_tag in document.getElementsByTagName("interface"):
1498
# Fix argument name for the GetManagedObjects method
1499
if (if_tag.getAttribute("name")
1500
== dbus.OBJECT_MANAGER_IFACE):
1501
for cn in if_tag.getElementsByTagName("method"):
1502
if (cn.getAttribute("name")
1503
== "GetManagedObjects"):
1504
for arg in cn.getElementsByTagName("arg"):
1505
if (arg.getAttribute("direction")
1509
"objpath_interfaces"
1511
xmlstring = document.toxml("utf-8")
1513
except (AttributeError, xml.dom.DOMException,
1514
xml.parsers.expat.ExpatError) as error:
1515
logger.error("Failed to override Introspection method",
1519
def datetime_to_dbus(dt, variant_level=0):
1520
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1522
return dbus.String("", variant_level = variant_level)
1523
return dbus.String(dt.isoformat(), variant_level=variant_level)
1526
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1527
"""A class decorator; applied to a subclass of
1528
dbus.service.Object, it will add alternate D-Bus attributes with
1529
interface names according to the "alt_interface_names" mapping.
1532
@alternate_dbus_interfaces({"org.example.Interface":
1533
"net.example.AlternateInterface"})
1534
class SampleDBusObject(dbus.service.Object):
1535
@dbus.service.method("org.example.Interface")
1536
def SampleDBusMethod():
1539
The above "SampleDBusMethod" on "SampleDBusObject" will be
1540
reachable via two interfaces: "org.example.Interface" and
1541
"net.example.AlternateInterface", the latter of which will have
1542
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1543
"true", unless "deprecate" is passed with a False value.
1545
This works for methods and signals, and also for D-Bus properties
1546
(from DBusObjectWithProperties) and interfaces (from the
1547
dbus_interface_annotations decorator).
1551
for orig_interface_name, alt_interface_name in (
1552
alt_interface_names.items()):
1554
interface_names = set()
1555
# Go though all attributes of the class
1556
for attrname, attribute in inspect.getmembers(cls):
1557
# Ignore non-D-Bus attributes, and D-Bus attributes
1558
# with the wrong interface name
1559
if (not hasattr(attribute, "_dbus_interface")
1560
or not attribute._dbus_interface.startswith(
1561
orig_interface_name)):
1563
# Create an alternate D-Bus interface name based on
1565
alt_interface = attribute._dbus_interface.replace(
1566
orig_interface_name, alt_interface_name)
1567
interface_names.add(alt_interface)
1568
# Is this a D-Bus signal?
1569
if getattr(attribute, "_dbus_is_signal", False):
1570
# Extract the original non-method undecorated
1571
# function by black magic
1572
if sys.version_info.major == 2:
1573
nonmethod_func = (dict(
1574
zip(attribute.func_code.co_freevars,
1575
attribute.__closure__))
1576
["func"].cell_contents)
1578
nonmethod_func = (dict(
1579
zip(attribute.__code__.co_freevars,
1580
attribute.__closure__))
1581
["func"].cell_contents)
1582
# Create a new, but exactly alike, function
1583
# object, and decorate it to be a new D-Bus signal
1584
# with the alternate D-Bus interface name
1585
new_function = copy_function(nonmethod_func)
1586
new_function = (dbus.service.signal(
1588
attribute._dbus_signature)(new_function))
1589
# Copy annotations, if any
1591
new_function._dbus_annotations = dict(
1592
attribute._dbus_annotations)
1593
except AttributeError:
1595
# Define a creator of a function to call both the
1596
# original and alternate functions, so both the
1597
# original and alternate signals gets sent when
1598
# the function is called
1599
def fixscope(func1, func2):
1600
"""This function is a scope container to pass
1601
func1 and func2 to the "call_both" function
1602
outside of its arguments"""
1604
@functools.wraps(func2)
1605
def call_both(*args, **kwargs):
1606
"""This function will emit two D-Bus
1607
signals by calling func1 and func2"""
1608
func1(*args, **kwargs)
1609
func2(*args, **kwargs)
1610
# Make wrapper function look like a D-Bus signal
1611
for name, attr in inspect.getmembers(func2):
1612
if name.startswith("_dbus_"):
1613
setattr(call_both, name, attr)
1616
# Create the "call_both" function and add it to
1618
attr[attrname] = fixscope(attribute, new_function)
1619
# Is this a D-Bus method?
1620
elif getattr(attribute, "_dbus_is_method", False):
1621
# Create a new, but exactly alike, function
1622
# object. Decorate it to be a new D-Bus method
1623
# with the alternate D-Bus interface name. Add it
1626
dbus.service.method(
1628
attribute._dbus_in_signature,
1629
attribute._dbus_out_signature)
1630
(copy_function(attribute)))
1631
# Copy annotations, if any
1633
attr[attrname]._dbus_annotations = dict(
1634
attribute._dbus_annotations)
1635
except AttributeError:
1637
# Is this a D-Bus property?
1638
elif getattr(attribute, "_dbus_is_property", False):
1639
# Create a new, but exactly alike, function
1640
# object, and decorate it to be a new D-Bus
1641
# property with the alternate D-Bus interface
1642
# name. Add it to the class.
1643
attr[attrname] = (dbus_service_property(
1644
alt_interface, attribute._dbus_signature,
1645
attribute._dbus_access,
1646
attribute._dbus_get_args_options
1648
(copy_function(attribute)))
1649
# Copy annotations, if any
1651
attr[attrname]._dbus_annotations = dict(
1652
attribute._dbus_annotations)
1653
except AttributeError:
1655
# Is this a D-Bus interface?
1656
elif getattr(attribute, "_dbus_is_interface", False):
1657
# Create a new, but exactly alike, function
1658
# object. Decorate it to be a new D-Bus interface
1659
# with the alternate D-Bus interface name. Add it
1662
dbus_interface_annotations(alt_interface)
1663
(copy_function(attribute)))
1665
# Deprecate all alternate interfaces
1666
iname="_AlternateDBusNames_interface_annotation{}"
1667
for interface_name in interface_names:
1669
@dbus_interface_annotations(interface_name)
1671
return { "org.freedesktop.DBus.Deprecated":
1673
# Find an unused name
1674
for aname in (iname.format(i)
1675
for i in itertools.count()):
1676
if aname not in attr:
1680
# Replace the class with a new subclass of it with
1681
# methods, signals, etc. as created above.
1682
if sys.version_info.major == 2:
1683
cls = type(b"{}Alternate".format(cls.__name__),
1686
cls = type("{}Alternate".format(cls.__name__),
1693
@alternate_dbus_interfaces({"se.recompile.Mandos":
1694
"se.bsnet.fukt.Mandos"})
1695
class ClientDBus(Client, DBusObjectWithProperties):
1696
"""A Client class using D-Bus
1699
dbus_object_path: dbus.ObjectPath
1700
bus: dbus.SystemBus()
1703
runtime_expansions = (Client.runtime_expansions
1704
+ ("dbus_object_path", ))
1706
_interface = "se.recompile.Mandos.Client"
1708
# dbus.service.Object doesn't use super(), so we can't either.
1710
def __init__(self, bus = None, *args, **kwargs):
1712
Client.__init__(self, *args, **kwargs)
1713
# Only now, when this client is initialized, can it show up on
1715
client_object_name = str(self.name).translate(
1716
{ord("."): ord("_"),
1717
ord("-"): ord("_")})
1718
self.dbus_object_path = dbus.ObjectPath(
1719
"/clients/" + client_object_name)
1720
DBusObjectWithProperties.__init__(self, self.bus,
1721
self.dbus_object_path)
1723
def notifychangeproperty(transform_func, dbus_name,
1724
type_func=lambda x: x,
1726
invalidate_only=False,
1727
_interface=_interface):
1728
""" Modify a variable so that it's a property which announces
1729
its changes to DBus.
1731
transform_fun: Function that takes a value and a variant_level
1732
and transforms it to a D-Bus type.
1733
dbus_name: D-Bus name of the variable
1734
type_func: Function that transform the value before sending it
1735
to the D-Bus. Default: no transform
1736
variant_level: D-Bus variant level. Default: 1
1738
attrname = "_{}".format(dbus_name)
1740
def setter(self, value):
1741
if hasattr(self, "dbus_object_path"):
1742
if (not hasattr(self, attrname) or
1743
type_func(getattr(self, attrname, None))
1744
!= type_func(value)):
1746
self.PropertiesChanged(
1747
_interface, dbus.Dictionary(),
1748
dbus.Array((dbus_name, )))
1750
dbus_value = transform_func(
1752
variant_level = variant_level)
1753
self.PropertyChanged(dbus.String(dbus_name),
1755
self.PropertiesChanged(
1757
dbus.Dictionary({ dbus.String(dbus_name):
1760
setattr(self, attrname, value)
1762
return property(lambda self: getattr(self, attrname), setter)
1764
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1765
approvals_pending = notifychangeproperty(dbus.Boolean,
1768
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1769
last_enabled = notifychangeproperty(datetime_to_dbus,
1771
checker = notifychangeproperty(
1772
dbus.Boolean, "CheckerRunning",
1773
type_func = lambda checker: checker is not None)
1774
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1776
last_checker_status = notifychangeproperty(dbus.Int16,
1777
"LastCheckerStatus")
1778
last_approval_request = notifychangeproperty(
1779
datetime_to_dbus, "LastApprovalRequest")
1780
approved_by_default = notifychangeproperty(dbus.Boolean,
1781
"ApprovedByDefault")
1782
approval_delay = notifychangeproperty(
1783
dbus.UInt64, "ApprovalDelay",
1784
type_func = lambda td: td.total_seconds() * 1000)
1785
approval_duration = notifychangeproperty(
1786
dbus.UInt64, "ApprovalDuration",
1787
type_func = lambda td: td.total_seconds() * 1000)
1788
host = notifychangeproperty(dbus.String, "Host")
1789
timeout = notifychangeproperty(
1790
dbus.UInt64, "Timeout",
1791
type_func = lambda td: td.total_seconds() * 1000)
1792
extended_timeout = notifychangeproperty(
1793
dbus.UInt64, "ExtendedTimeout",
1794
type_func = lambda td: td.total_seconds() * 1000)
1795
interval = notifychangeproperty(
1796
dbus.UInt64, "Interval",
1797
type_func = lambda td: td.total_seconds() * 1000)
1798
checker_command = notifychangeproperty(dbus.String, "Checker")
1799
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1800
invalidate_only=True)
1802
del notifychangeproperty
1804
def __del__(self, *args, **kwargs):
1806
self.remove_from_connection()
1809
if hasattr(DBusObjectWithProperties, "__del__"):
1810
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1811
Client.__del__(self, *args, **kwargs)
1813
def checker_callback(self, source, condition,
1814
connection, command, *args, **kwargs):
1815
ret = Client.checker_callback(self, source, condition,
1816
connection, command, *args,
1818
exitstatus = self.last_checker_status
1821
self.CheckerCompleted(dbus.Int16(exitstatus),
1822
# This is specific to GNU libC
1823
dbus.Int64(exitstatus << 8),
1824
dbus.String(command))
1827
self.CheckerCompleted(dbus.Int16(-1),
1829
# This is specific to GNU libC
1831
| self.last_checker_signal),
1832
dbus.String(command))
1835
def start_checker(self, *args, **kwargs):
1836
old_checker_pid = getattr(self.checker, "pid", None)
1837
r = Client.start_checker(self, *args, **kwargs)
1838
# Only if new checker process was started
1839
if (self.checker is not None
1840
and old_checker_pid != self.checker.pid):
1842
self.CheckerStarted(self.current_checker_command)
1845
def _reset_approved(self):
1846
self.approved = None
1849
def approve(self, value=True):
1850
self.approved = value
1851
GLib.timeout_add(int(self.approval_duration.total_seconds()
1852
* 1000), self._reset_approved)
1853
self.send_changedstate()
1855
## D-Bus methods, signals & properties
1861
# CheckerCompleted - signal
1862
@dbus.service.signal(_interface, signature="nxs")
1863
def CheckerCompleted(self, exitcode, waitstatus, command):
1867
# CheckerStarted - signal
1868
@dbus.service.signal(_interface, signature="s")
1869
def CheckerStarted(self, command):
1873
# PropertyChanged - signal
1874
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1875
@dbus.service.signal(_interface, signature="sv")
1876
def PropertyChanged(self, property, value):
1880
# GotSecret - signal
1881
@dbus.service.signal(_interface)
1882
def GotSecret(self):
1884
Is sent after a successful transfer of secret from the Mandos
1885
server to mandos-client
1890
@dbus.service.signal(_interface, signature="s")
1891
def Rejected(self, reason):
1895
# NeedApproval - signal
1896
@dbus.service.signal(_interface, signature="tb")
1897
def NeedApproval(self, timeout, default):
1899
return self.need_approval()
1904
@dbus.service.method(_interface, in_signature="b")
1905
def Approve(self, value):
1908
# CheckedOK - method
1909
@dbus.service.method(_interface)
1910
def CheckedOK(self):
1914
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1915
@dbus.service.method(_interface)
1920
# StartChecker - method
1921
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1922
@dbus.service.method(_interface)
1923
def StartChecker(self):
1925
self.start_checker()
1928
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1929
@dbus.service.method(_interface)
1934
# StopChecker - method
1935
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1936
@dbus.service.method(_interface)
1937
def StopChecker(self):
1942
# ApprovalPending - property
1943
@dbus_service_property(_interface, signature="b", access="read")
1944
def ApprovalPending_dbus_property(self):
1945
return dbus.Boolean(bool(self.approvals_pending))
1947
# ApprovedByDefault - property
1948
@dbus_service_property(_interface,
1951
def ApprovedByDefault_dbus_property(self, value=None):
1952
if value is None: # get
1953
return dbus.Boolean(self.approved_by_default)
1954
self.approved_by_default = bool(value)
1956
# ApprovalDelay - property
1957
@dbus_service_property(_interface,
1960
def ApprovalDelay_dbus_property(self, value=None):
1961
if value is None: # get
1962
return dbus.UInt64(self.approval_delay.total_seconds()
1964
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1966
# ApprovalDuration - property
1967
@dbus_service_property(_interface,
1970
def ApprovalDuration_dbus_property(self, value=None):
1971
if value is None: # get
1972
return dbus.UInt64(self.approval_duration.total_seconds()
1974
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1978
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1979
@dbus_service_property(_interface, signature="s", access="read")
1980
def Name_dbus_property(self):
1981
return dbus.String(self.name)
1983
# Fingerprint - property
1985
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1986
@dbus_service_property(_interface, signature="s", access="read")
1987
def Fingerprint_dbus_property(self):
1988
return dbus.String(self.fingerprint)
1991
@dbus_service_property(_interface,
1994
def Host_dbus_property(self, value=None):
1995
if value is None: # get
1996
return dbus.String(self.host)
1997
self.host = str(value)
1999
# Created - property
2001
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2002
@dbus_service_property(_interface, signature="s", access="read")
2003
def Created_dbus_property(self):
2004
return datetime_to_dbus(self.created)
2006
# LastEnabled - property
2007
@dbus_service_property(_interface, signature="s", access="read")
2008
def LastEnabled_dbus_property(self):
2009
return datetime_to_dbus(self.last_enabled)
2011
# Enabled - property
2012
@dbus_service_property(_interface,
2015
def Enabled_dbus_property(self, value=None):
2016
if value is None: # get
2017
return dbus.Boolean(self.enabled)
2023
# LastCheckedOK - property
2024
@dbus_service_property(_interface,
2027
def LastCheckedOK_dbus_property(self, value=None):
2028
if value is not None:
2031
return datetime_to_dbus(self.last_checked_ok)
2033
# LastCheckerStatus - property
2034
@dbus_service_property(_interface, signature="n", access="read")
2035
def LastCheckerStatus_dbus_property(self):
2036
return dbus.Int16(self.last_checker_status)
2038
# Expires - property
2039
@dbus_service_property(_interface, signature="s", access="read")
2040
def Expires_dbus_property(self):
2041
return datetime_to_dbus(self.expires)
2043
# LastApprovalRequest - property
2044
@dbus_service_property(_interface, signature="s", access="read")
2045
def LastApprovalRequest_dbus_property(self):
2046
return datetime_to_dbus(self.last_approval_request)
2048
# Timeout - property
2049
@dbus_service_property(_interface,
2052
def Timeout_dbus_property(self, value=None):
2053
if value is None: # get
2054
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2055
old_timeout = self.timeout
2056
self.timeout = datetime.timedelta(0, 0, 0, value)
2057
# Reschedule disabling
2059
now = datetime.datetime.utcnow()
2060
self.expires += self.timeout - old_timeout
2061
if self.expires <= now:
2062
# The timeout has passed
2065
if (getattr(self, "disable_initiator_tag", None)
2068
GLib.source_remove(self.disable_initiator_tag)
2069
self.disable_initiator_tag = GLib.timeout_add(
2070
int((self.expires - now).total_seconds() * 1000),
2073
# ExtendedTimeout - property
2074
@dbus_service_property(_interface,
2077
def ExtendedTimeout_dbus_property(self, value=None):
2078
if value is None: # get
2079
return dbus.UInt64(self.extended_timeout.total_seconds()
2081
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2083
# Interval - property
2084
@dbus_service_property(_interface,
2087
def Interval_dbus_property(self, value=None):
2088
if value is None: # get
2089
return dbus.UInt64(self.interval.total_seconds() * 1000)
2090
self.interval = datetime.timedelta(0, 0, 0, value)
2091
if getattr(self, "checker_initiator_tag", None) is None:
2094
# Reschedule checker run
2095
GLib.source_remove(self.checker_initiator_tag)
2096
self.checker_initiator_tag = GLib.timeout_add(
2097
value, self.start_checker)
2098
self.start_checker() # Start one now, too
2100
# Checker - property
2101
@dbus_service_property(_interface,
2104
def Checker_dbus_property(self, value=None):
2105
if value is None: # get
2106
return dbus.String(self.checker_command)
2107
self.checker_command = str(value)
2109
# CheckerRunning - property
2110
@dbus_service_property(_interface,
2113
def CheckerRunning_dbus_property(self, value=None):
2114
if value is None: # get
2115
return dbus.Boolean(self.checker is not None)
2117
self.start_checker()
2121
# ObjectPath - property
2123
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2124
"org.freedesktop.DBus.Deprecated": "true"})
2125
@dbus_service_property(_interface, signature="o", access="read")
2126
def ObjectPath_dbus_property(self):
2127
return self.dbus_object_path # is already a dbus.ObjectPath
2131
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2133
@dbus_service_property(_interface,
2137
def Secret_dbus_property(self, value):
2138
self.secret = bytes(value)
2143
class ProxyClient(object):
2144
def __init__(self, child_pipe, fpr, address):
2145
self._pipe = child_pipe
2146
self._pipe.send(('init', fpr, address))
2147
if not self._pipe.recv():
2150
def __getattribute__(self, name):
2152
return super(ProxyClient, self).__getattribute__(name)
2153
self._pipe.send(('getattr', name))
2154
data = self._pipe.recv()
2155
if data[0] == 'data':
2157
if data[0] == 'function':
2159
def func(*args, **kwargs):
2160
self._pipe.send(('funcall', name, args, kwargs))
2161
return self._pipe.recv()[1]
2165
def __setattr__(self, name, value):
2167
return super(ProxyClient, self).__setattr__(name, value)
2168
self._pipe.send(('setattr', name, value))
2171
class ClientHandler(socketserver.BaseRequestHandler, object):
2172
"""A class to handle client connections.
2174
Instantiated once for each connection to handle it.
2175
Note: This will run in its own forked process."""
2178
with contextlib.closing(self.server.child_pipe) as child_pipe:
2179
logger.info("TCP connection from: %s",
2180
str(self.client_address))
2181
logger.debug("Pipe FD: %d",
2182
self.server.child_pipe.fileno())
2184
session = gnutls.ClientSession(self.request)
2186
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
2187
# "+AES-256-CBC", "+SHA1",
2188
# "+COMP-NULL", "+CTYPE-OPENPGP",
2190
# Use a fallback default, since this MUST be set.
2191
priority = self.server.gnutls_priority
2192
if priority is None:
2194
gnutls.priority_set_direct(session._c_object,
2195
priority.encode("utf-8"),
2198
# Start communication using the Mandos protocol
2199
# Get protocol number
2200
line = self.request.makefile().readline()
2201
logger.debug("Protocol version: %r", line)
2203
if int(line.strip().split()[0]) > 1:
2204
raise RuntimeError(line)
2205
except (ValueError, IndexError, RuntimeError) as error:
2206
logger.error("Unknown protocol version: %s", error)
2209
# Start GnuTLS connection
2212
except gnutls.Error as error:
2213
logger.warning("Handshake failed: %s", error)
2214
# Do not run session.bye() here: the session is not
2215
# established. Just abandon the request.
2217
logger.debug("Handshake succeeded")
2219
approval_required = False
2222
fpr = self.fingerprint(
2223
self.peer_certificate(session))
2224
except (TypeError, gnutls.Error) as error:
2225
logger.warning("Bad certificate: %s", error)
2227
logger.debug("Fingerprint: %s", fpr)
2230
client = ProxyClient(child_pipe, fpr,
2231
self.client_address)
2235
if client.approval_delay:
2236
delay = client.approval_delay
2237
client.approvals_pending += 1
2238
approval_required = True
2241
if not client.enabled:
2242
logger.info("Client %s is disabled",
2244
if self.server.use_dbus:
2246
client.Rejected("Disabled")
2249
if client.approved or not client.approval_delay:
2250
#We are approved or approval is disabled
2252
elif client.approved is None:
2253
logger.info("Client %s needs approval",
2255
if self.server.use_dbus:
2257
client.NeedApproval(
2258
client.approval_delay.total_seconds()
2259
* 1000, client.approved_by_default)
2261
logger.warning("Client %s was not approved",
2263
if self.server.use_dbus:
2265
client.Rejected("Denied")
2268
#wait until timeout or approved
2269
time = datetime.datetime.now()
2270
client.changedstate.acquire()
2271
client.changedstate.wait(delay.total_seconds())
2272
client.changedstate.release()
2273
time2 = datetime.datetime.now()
2274
if (time2 - time) >= delay:
2275
if not client.approved_by_default:
2276
logger.warning("Client %s timed out while"
2277
" waiting for approval",
2279
if self.server.use_dbus:
2281
client.Rejected("Approval timed out")
2286
delay -= time2 - time
2289
session.send(client.secret)
2290
except gnutls.Error as error:
2291
logger.warning("gnutls send failed",
2295
logger.info("Sending secret to %s", client.name)
2296
# bump the timeout using extended_timeout
2297
client.bump_timeout(client.extended_timeout)
2298
if self.server.use_dbus:
2303
if approval_required:
2304
client.approvals_pending -= 1
2307
except gnutls.Error as error:
2308
logger.warning("GnuTLS bye failed",
2312
def peer_certificate(session):
2313
"Return the peer's OpenPGP certificate as a bytestring"
2314
# If not an OpenPGP certificate...
2315
if (gnutls.certificate_type_get(session._c_object)
2316
!= gnutls.CRT_OPENPGP):
2317
# ...return invalid data
2319
list_size = ctypes.c_uint(1)
2320
cert_list = (gnutls.certificate_get_peers
2321
(session._c_object, ctypes.byref(list_size)))
2322
if not bool(cert_list) and list_size.value != 0:
2323
raise gnutls.Error("error getting peer certificate")
2324
if list_size.value == 0:
85
__del__ = stop_checker
87
if self.checker is None:
2327
return ctypes.string_at(cert.data, cert.size)
2330
def fingerprint(openpgp):
2331
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2332
# New GnuTLS "datum" with the OpenPGP public key
2333
datum = gnutls.datum_t(
2334
ctypes.cast(ctypes.c_char_p(openpgp),
2335
ctypes.POINTER(ctypes.c_ubyte)),
2336
ctypes.c_uint(len(openpgp)))
2337
# New empty GnuTLS certificate
2338
crt = gnutls.openpgp_crt_t()
2339
gnutls.openpgp_crt_init(ctypes.byref(crt))
2340
# Import the OpenPGP public key into the certificate
2341
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2342
gnutls.OPENPGP_FMT_RAW)
2343
# Verify the self signature in the key
2344
crtverify = ctypes.c_uint()
2345
gnutls.openpgp_crt_verify_self(crt, 0,
2346
ctypes.byref(crtverify))
2347
if crtverify.value != 0:
2348
gnutls.openpgp_crt_deinit(crt)
2349
raise gnutls.CertificateSecurityError("Verify failed")
2350
# New buffer for the fingerprint
2351
buf = ctypes.create_string_buffer(20)
2352
buf_len = ctypes.c_size_t()
2353
# Get the fingerprint from the certificate into the buffer
2354
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2355
ctypes.byref(buf_len))
2356
# Deinit the certificate
2357
gnutls.openpgp_crt_deinit(crt)
2358
# Convert the buffer to a Python bytestring
2359
fpr = ctypes.string_at(buf, buf_len.value)
2360
# Convert the bytestring to hexadecimal notation
2361
hex_fpr = binascii.hexlify(fpr).upper()
2365
class MultiprocessingMixIn(object):
2366
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2368
def sub_process_main(self, request, address):
2370
self.finish_request(request, address)
2372
self.handle_error(request, address)
2373
self.close_request(request)
2375
def process_request(self, request, address):
2376
"""Start a new process to process the request."""
2377
proc = multiprocessing.Process(target = self.sub_process_main,
2378
args = (request, address))
2383
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2384
""" adds a pipe to the MixIn """
2386
def process_request(self, request, client_address):
2387
"""Overrides and wraps the original process_request().
2389
This function creates a new pipe in self.pipe
2391
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2393
proc = MultiprocessingMixIn.process_request(self, request,
2395
self.child_pipe.close()
2396
self.add_pipe(parent_pipe, proc)
2398
def add_pipe(self, parent_pipe, proc):
2399
"""Dummy function; override as necessary"""
2400
raise NotImplementedError()
2403
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2404
socketserver.TCPServer, object):
2405
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2408
enabled: Boolean; whether this server is activated yet
2409
interface: None or a network interface name (string)
2410
use_ipv6: Boolean; to use IPv6 or not
2413
def __init__(self, server_address, RequestHandlerClass,
2417
"""If socketfd is set, use that file descriptor instead of
2418
creating a new one with socket.socket().
2420
self.interface = interface
2422
self.address_family = socket.AF_INET6
2423
if socketfd is not None:
2424
# Save the file descriptor
2425
self.socketfd = socketfd
2426
# Save the original socket.socket() function
2427
self.socket_socket = socket.socket
2428
# To implement --socket, we monkey patch socket.socket.
2430
# (When socketserver.TCPServer is a new-style class, we
2431
# could make self.socket into a property instead of monkey
2432
# patching socket.socket.)
2434
# Create a one-time-only replacement for socket.socket()
2435
@functools.wraps(socket.socket)
2436
def socket_wrapper(*args, **kwargs):
2437
# Restore original function so subsequent calls are
2439
socket.socket = self.socket_socket
2440
del self.socket_socket
2441
# This time only, return a new socket object from the
2442
# saved file descriptor.
2443
return socket.fromfd(self.socketfd, *args, **kwargs)
2444
# Replace socket.socket() function with wrapper
2445
socket.socket = socket_wrapper
2446
# The socketserver.TCPServer.__init__ will call
2447
# socket.socket(), which might be our replacement,
2448
# socket_wrapper(), if socketfd was set.
2449
socketserver.TCPServer.__init__(self, server_address,
2450
RequestHandlerClass)
2452
def server_bind(self):
2453
"""This overrides the normal server_bind() function
2454
to bind to an interface if one was specified, and also NOT to
2455
bind to an address or port if they were not specified."""
2456
global SO_BINDTODEVICE
2457
if self.interface is not None:
2458
if SO_BINDTODEVICE is None:
2459
# Fall back to a hard-coded value which seems to be
2461
logger.warning("SO_BINDTODEVICE not found, trying 25")
2462
SO_BINDTODEVICE = 25
2464
self.socket.setsockopt(
2465
socket.SOL_SOCKET, SO_BINDTODEVICE,
2466
(self.interface + "\0").encode("utf-8"))
2467
except socket.error as error:
2468
if error.errno == errno.EPERM:
2469
logger.error("No permission to bind to"
2470
" interface %s", self.interface)
2471
elif error.errno == errno.ENOPROTOOPT:
2472
logger.error("SO_BINDTODEVICE not available;"
2473
" cannot bind to interface %s",
2475
elif error.errno == errno.ENODEV:
2476
logger.error("Interface %s does not exist,"
2477
" cannot bind", self.interface)
2480
# Only bind(2) the socket if we really need to.
2481
if self.server_address[0] or self.server_address[1]:
2482
if not self.server_address[0]:
2483
if self.address_family == socket.AF_INET6:
2484
any_address = "::" # in6addr_any
2486
any_address = "0.0.0.0" # INADDR_ANY
2487
self.server_address = (any_address,
2488
self.server_address[1])
2489
elif not self.server_address[1]:
2490
self.server_address = (self.server_address[0], 0)
2491
# if self.interface:
2492
# self.server_address = (self.server_address[0],
2497
return socketserver.TCPServer.server_bind(self)
2500
class MandosServer(IPv6_TCPServer):
2504
clients: set of Client objects
2505
gnutls_priority GnuTLS priority string
2506
use_dbus: Boolean; to emit D-Bus signals or not
2508
Assumes a GLib.MainLoop event loop.
2511
def __init__(self, server_address, RequestHandlerClass,
2515
gnutls_priority=None,
2518
self.enabled = False
2519
self.clients = clients
2520
if self.clients is None:
2522
self.use_dbus = use_dbus
2523
self.gnutls_priority = gnutls_priority
2524
IPv6_TCPServer.__init__(self, server_address,
2525
RequestHandlerClass,
2526
interface = interface,
2527
use_ipv6 = use_ipv6,
2528
socketfd = socketfd)
2530
def server_activate(self):
2532
return socketserver.TCPServer.server_activate(self)
2537
def add_pipe(self, parent_pipe, proc):
2538
# Call "handle_ipc" for both data and EOF events
2540
parent_pipe.fileno(),
2541
GLib.IO_IN | GLib.IO_HUP,
2542
functools.partial(self.handle_ipc,
2543
parent_pipe = parent_pipe,
2546
def handle_ipc(self, source, condition,
2549
client_object=None):
2550
# error, or the other end of multiprocessing.Pipe has closed
2551
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2552
# Wait for other process to exit
2556
# Read a request from the child
2557
request = parent_pipe.recv()
2558
command = request[0]
2560
if command == 'init':
2562
address = request[2]
2564
for c in self.clients.values():
2565
if c.fingerprint == fpr:
2569
logger.info("Client not found for fingerprint: %s, ad"
2570
"dress: %s", fpr, address)
2573
mandos_dbus_service.ClientNotFound(fpr,
2575
parent_pipe.send(False)
2579
parent_pipe.fileno(),
2580
GLib.IO_IN | GLib.IO_HUP,
2581
functools.partial(self.handle_ipc,
2582
parent_pipe = parent_pipe,
2584
client_object = client))
2585
parent_pipe.send(True)
2586
# remove the old hook in favor of the new above hook on
2589
if command == 'funcall':
2590
funcname = request[1]
2594
parent_pipe.send(('data', getattr(client_object,
2598
if command == 'getattr':
2599
attrname = request[1]
2600
if isinstance(client_object.__getattribute__(attrname),
2601
collections.Callable):
2602
parent_pipe.send(('function', ))
2605
'data', client_object.__getattribute__(attrname)))
2607
if command == 'setattr':
2608
attrname = request[1]
2610
setattr(client_object, attrname, value)
2615
def rfc3339_duration_to_delta(duration):
2616
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2618
>>> rfc3339_duration_to_delta("P7D")
2619
datetime.timedelta(7)
2620
>>> rfc3339_duration_to_delta("PT60S")
2621
datetime.timedelta(0, 60)
2622
>>> rfc3339_duration_to_delta("PT60M")
2623
datetime.timedelta(0, 3600)
2624
>>> rfc3339_duration_to_delta("PT24H")
2625
datetime.timedelta(1)
2626
>>> rfc3339_duration_to_delta("P1W")
2627
datetime.timedelta(7)
2628
>>> rfc3339_duration_to_delta("PT5M30S")
2629
datetime.timedelta(0, 330)
2630
>>> rfc3339_duration_to_delta("P1DT3M20S")
2631
datetime.timedelta(1, 200)
2634
# Parsing an RFC 3339 duration with regular expressions is not
2635
# possible - there would have to be multiple places for the same
2636
# values, like seconds. The current code, while more esoteric, is
2637
# cleaner without depending on a parsing library. If Python had a
2638
# built-in library for parsing we would use it, but we'd like to
2639
# avoid excessive use of external libraries.
2641
# New type for defining tokens, syntax, and semantics all-in-one
2642
Token = collections.namedtuple("Token", (
2643
"regexp", # To match token; if "value" is not None, must have
2644
# a "group" containing digits
2645
"value", # datetime.timedelta or None
2646
"followers")) # Tokens valid after this token
2647
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2648
# the "duration" ABNF definition in RFC 3339, Appendix A.
2649
token_end = Token(re.compile(r"$"), None, frozenset())
2650
token_second = Token(re.compile(r"(\d+)S"),
2651
datetime.timedelta(seconds=1),
2652
frozenset((token_end, )))
2653
token_minute = Token(re.compile(r"(\d+)M"),
2654
datetime.timedelta(minutes=1),
2655
frozenset((token_second, token_end)))
2656
token_hour = Token(re.compile(r"(\d+)H"),
2657
datetime.timedelta(hours=1),
2658
frozenset((token_minute, token_end)))
2659
token_time = Token(re.compile(r"T"),
2661
frozenset((token_hour, token_minute,
2663
token_day = Token(re.compile(r"(\d+)D"),
2664
datetime.timedelta(days=1),
2665
frozenset((token_time, token_end)))
2666
token_month = Token(re.compile(r"(\d+)M"),
2667
datetime.timedelta(weeks=4),
2668
frozenset((token_day, token_end)))
2669
token_year = Token(re.compile(r"(\d+)Y"),
2670
datetime.timedelta(weeks=52),
2671
frozenset((token_month, token_end)))
2672
token_week = Token(re.compile(r"(\d+)W"),
2673
datetime.timedelta(weeks=1),
2674
frozenset((token_end, )))
2675
token_duration = Token(re.compile(r"P"), None,
2676
frozenset((token_year, token_month,
2677
token_day, token_time,
2679
# Define starting values
2680
value = datetime.timedelta() # Value so far
2682
followers = frozenset((token_duration, )) # Following valid tokens
2683
s = duration # String left to parse
2684
# Loop until end token is found
2685
while found_token is not token_end:
2686
# Search for any currently valid tokens
2687
for token in followers:
2688
match = token.regexp.match(s)
2689
if match is not None:
2691
if token.value is not None:
2692
# Value found, parse digits
2693
factor = int(match.group(1), 10)
2694
# Add to value so far
2695
value += factor * token.value
2696
# Strip token from string
2697
s = token.regexp.sub("", s, 1)
2700
# Set valid next tokens
2701
followers = found_token.followers
2704
# No currently valid tokens were found
2705
raise ValueError("Invalid RFC 3339 duration: {!r}"
89
return self.checker.stdout.fileno()
91
"""The time when something must be done about this client
92
May be in the past."""
93
if self.last_seen is None:
94
# This client has never been seen
95
next_timeout = self.created + self.timeout
97
next_timeout = self.last_seen + self.timeout
98
if self.checker is None:
99
return min(next_timeout, self.next_check)
102
def still_valid(self, now=None):
103
"""Has this client's timeout not passed?"""
105
now = datetime.datetime.now()
106
if self.last_seen is None:
107
return now < (self.created + self.timeout)
109
return now < (self.last_seen + self.timeout)
110
def it_is_time_to_check(self, now=None):
112
now = datetime.datetime.now()
113
return self.next_check <= now
116
class server_metaclass(type):
117
"Common behavior for the UDP and TCP server classes"
118
def __new__(cls, name, bases, attrs):
119
attrs["address_family"] = socket.AF_INET6
120
attrs["allow_reuse_address"] = True
121
def server_bind(self):
122
if self.options.interface:
123
if not hasattr(socket, "SO_BINDTODEVICE"):
124
# From /usr/include/asm-i486/socket.h
125
socket.SO_BINDTODEVICE = 25
127
self.socket.setsockopt(socket.SOL_SOCKET,
128
socket.SO_BINDTODEVICE,
129
self.options.interface)
130
except socket.error, error:
131
if error[0] == errno.EPERM:
132
print "Warning: No permission to bind to interface", \
133
self.options.interface
136
return super(type(self), self).server_bind()
137
attrs["server_bind"] = server_bind
138
def init(self, *args, **kwargs):
139
if "options" in kwargs:
140
self.options = kwargs["options"]
141
del kwargs["options"]
142
if "clients" in kwargs:
143
self.clients = kwargs["clients"]
144
del kwargs["clients"]
145
if "credentials" in kwargs:
146
self.credentials = kwargs["credentials"]
147
del kwargs["credentials"]
148
return super(type(self), self).__init__(*args, **kwargs)
149
attrs["__init__"] = init
150
return type.__new__(cls, name, bases, attrs)
153
class udp_handler(SocketServer.DatagramRequestHandler, object):
155
self.wfile.write("Polo")
156
print "UDP request answered"
159
class IPv6_UDPServer(SocketServer.UDPServer, object):
160
__metaclass__ = server_metaclass
161
def verify_request(self, request, client_address):
162
print "UDP request came"
163
return request[0] == "Marco"
166
class tcp_handler(SocketServer.BaseRequestHandler, object):
168
print "TCP request came"
169
print "Request:", self.request
170
print "Client Address:", self.client_address
171
print "Server:", self.server
172
session = gnutls.connection.ServerSession(self.request,
173
self.server.credentials)
175
if session.peer_certificate:
176
print "DN:", session.peer_certificate.subject
178
session.verify_peer()
179
except gnutls.errors.CertificateError, error:
180
print "Verify failed", error
184
session.send([client.password
185
for client in self.server.clients
187
session.peer_certificate.subject)][0])
189
session.send("gazonk")
194
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
195
__metaclass__ = server_metaclass
2711
198
def string_to_delta(interval):
2712
199
"""Parse a string and return a datetime.timedelta
2714
201
>>> string_to_delta('7d')
2715
202
datetime.timedelta(7)
2716
203
>>> string_to_delta('60s')
2719
206
datetime.timedelta(0, 3600)
2720
207
>>> string_to_delta('24h')
2721
208
datetime.timedelta(1)
2722
>>> string_to_delta('1w')
209
>>> string_to_delta(u'1w')
2723
210
datetime.timedelta(7)
2724
>>> string_to_delta('5m 30s')
2725
datetime.timedelta(0, 330)
2729
return rfc3339_duration_to_delta(interval)
2733
timevalue = datetime.timedelta(0)
2734
for s in interval.split():
2739
delta = datetime.timedelta(value)
2741
delta = datetime.timedelta(0, value)
2743
delta = datetime.timedelta(0, 0, 0, 0, value)
2745
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2747
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2749
raise ValueError("Unknown suffix {!r}".format(suffix))
2750
except IndexError as e:
2751
raise ValueError(*(e.args))
2756
def daemon(nochdir = False, noclose = False):
2757
"""See daemon(3). Standard BSD Unix function.
2759
This should really exist as os.daemon, but it doesn't (yet)."""
2768
# Close all standard open file descriptors
2769
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2770
if not stat.S_ISCHR(os.fstat(null).st_mode):
2771
raise OSError(errno.ENODEV,
2772
"{} not a character device"
2773
.format(os.devnull))
2774
os.dup2(null, sys.stdin.fileno())
2775
os.dup2(null, sys.stdout.fileno())
2776
os.dup2(null, sys.stderr.fileno())
213
suffix=unicode(interval[-1])
214
value=int(interval[:-1])
216
delta = datetime.timedelta(value)
218
delta = datetime.timedelta(0, value)
220
delta = datetime.timedelta(0, 0, 0, 0, value)
222
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
224
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
227
except (ValueError, IndexError):
2783
##################################################################
2784
# Parsing of options, both command line and config file
2786
parser = argparse.ArgumentParser()
2787
parser.add_argument("-v", "--version", action="version",
2788
version = "%(prog)s {}".format(version),
2789
help="show version number and exit")
2790
parser.add_argument("-i", "--interface", metavar="IF",
2791
help="Bind to interface IF")
2792
parser.add_argument("-a", "--address",
2793
help="Address to listen for requests on")
2794
parser.add_argument("-p", "--port", type=int,
2795
help="Port number to receive requests on")
2796
parser.add_argument("--check", action="store_true",
2797
help="Run self-test")
2798
parser.add_argument("--debug", action="store_true",
2799
help="Debug mode; run in foreground and log"
2800
" to terminal", default=None)
2801
parser.add_argument("--debuglevel", metavar="LEVEL",
2802
help="Debug level for stdout output")
2803
parser.add_argument("--priority", help="GnuTLS"
2804
" priority string (see GnuTLS documentation)")
2805
parser.add_argument("--servicename",
2806
metavar="NAME", help="Zeroconf service name")
2807
parser.add_argument("--configdir",
2808
default="/etc/mandos", metavar="DIR",
2809
help="Directory to search for configuration"
2811
parser.add_argument("--no-dbus", action="store_false",
2812
dest="use_dbus", help="Do not provide D-Bus"
2813
" system bus interface", default=None)
2814
parser.add_argument("--no-ipv6", action="store_false",
2815
dest="use_ipv6", help="Do not use IPv6",
2817
parser.add_argument("--no-restore", action="store_false",
2818
dest="restore", help="Do not restore stored"
2819
" state", default=None)
2820
parser.add_argument("--socket", type=int,
2821
help="Specify a file descriptor to a network"
2822
" socket to use instead of creating one")
2823
parser.add_argument("--statedir", metavar="DIR",
2824
help="Directory to save/restore state in")
2825
parser.add_argument("--foreground", action="store_true",
2826
help="Run in foreground", default=None)
2827
parser.add_argument("--no-zeroconf", action="store_false",
2828
dest="zeroconf", help="Do not use Zeroconf",
2831
options = parser.parse_args()
233
parser = OptionParser()
234
parser.add_option("-i", "--interface", type="string",
235
default="eth0", metavar="IF",
236
help="Interface to bind to")
237
parser.add_option("--cert", type="string", default="cert.pem",
239
help="Public key certificate to use")
240
parser.add_option("--key", type="string", default="key.pem",
242
help="Private key to use")
243
parser.add_option("--ca", type="string", default="ca.pem",
245
help="Certificate Authority certificate to use")
246
parser.add_option("--crl", type="string", default="crl.pem",
248
help="Certificate Revokation List to use")
249
parser.add_option("-p", "--port", type="int", default=49001,
250
help="Port number to receive requests on")
251
parser.add_option("--dh", type="int", metavar="BITS",
252
help="DH group to use")
253
parser.add_option("-t", "--timeout", type="string", # Parsed later
255
help="Amount of downtime allowed for clients")
256
parser.add_option("--interval", type="string", # Parsed later
258
help="How often to check that a client is up")
259
parser.add_option("--check", action="store_true", default=False,
260
help="Run self-test")
261
(options, args) = parser.parse_args()
2833
263
if options.check:
2835
fail_count, test_count = doctest.testmod()
2836
sys.exit(os.EX_OK if fail_count == 0 else 1)
2838
# Default values for config file for server-global settings
2839
server_defaults = { "interface": "",
2844
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2845
":+SIGN-DSA-SHA256",
2846
"servicename": "Mandos",
2852
"statedir": "/var/lib/mandos",
2853
"foreground": "False",
2857
# Parse config file for server-global settings
2858
server_config = configparser.SafeConfigParser(server_defaults)
2860
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2861
# Convert the SafeConfigParser object to a dict
2862
server_settings = server_config.defaults()
2863
# Use the appropriate methods on the non-string config options
2864
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2865
server_settings[option] = server_config.getboolean("DEFAULT",
2867
if server_settings["port"]:
2868
server_settings["port"] = server_config.getint("DEFAULT",
2870
if server_settings["socket"]:
2871
server_settings["socket"] = server_config.getint("DEFAULT",
2873
# Later, stdin will, and stdout and stderr might, be dup'ed
2874
# over with an opened os.devnull. But we don't want this to
2875
# happen with a supplied network socket.
2876
if 0 <= server_settings["socket"] <= 2:
2877
server_settings["socket"] = os.dup(server_settings
2881
# Override the settings from the config file with command line
2883
for option in ("interface", "address", "port", "debug",
2884
"priority", "servicename", "configdir", "use_dbus",
2885
"use_ipv6", "debuglevel", "restore", "statedir",
2886
"socket", "foreground", "zeroconf"):
2887
value = getattr(options, option)
2888
if value is not None:
2889
server_settings[option] = value
2891
# Force all strings to be unicode
2892
for option in server_settings.keys():
2893
if isinstance(server_settings[option], bytes):
2894
server_settings[option] = (server_settings[option]
2896
# Force all boolean options to be boolean
2897
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2898
"foreground", "zeroconf"):
2899
server_settings[option] = bool(server_settings[option])
2900
# Debug implies foreground
2901
if server_settings["debug"]:
2902
server_settings["foreground"] = True
2903
# Now we have our good server settings in "server_settings"
2905
##################################################################
2907
if (not server_settings["zeroconf"]
2908
and not (server_settings["port"]
2909
or server_settings["socket"] != "")):
2910
parser.error("Needs port or socket to work without Zeroconf")
2913
debug = server_settings["debug"]
2914
debuglevel = server_settings["debuglevel"]
2915
use_dbus = server_settings["use_dbus"]
2916
use_ipv6 = server_settings["use_ipv6"]
2917
stored_state_path = os.path.join(server_settings["statedir"],
2919
foreground = server_settings["foreground"]
2920
zeroconf = server_settings["zeroconf"]
2923
initlogger(debug, logging.DEBUG)
2928
level = getattr(logging, debuglevel.upper())
2929
initlogger(debug, level)
2931
if server_settings["servicename"] != "Mandos":
2932
syslogger.setFormatter(
2933
logging.Formatter('Mandos ({}) [%(process)d]:'
2934
' %(levelname)s: %(message)s'.format(
2935
server_settings["servicename"])))
2937
# Parse config file with clients
2938
client_config = configparser.SafeConfigParser(Client
2940
client_config.read(os.path.join(server_settings["configdir"],
2943
global mandos_dbus_service
2944
mandos_dbus_service = None
2947
if server_settings["socket"] != "":
2948
socketfd = server_settings["socket"]
2949
tcp_server = MandosServer(
2950
(server_settings["address"], server_settings["port"]),
2952
interface=(server_settings["interface"] or None),
2954
gnutls_priority=server_settings["priority"],
2958
pidfilename = "/run/mandos.pid"
2959
if not os.path.isdir("/run/."):
2960
pidfilename = "/var/run/mandos.pid"
2963
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2964
except IOError as e:
2965
logger.error("Could not open file %r", pidfilename,
2968
for name, group in (("_mandos", "_mandos"),
2969
("mandos", "mandos"),
2970
("nobody", "nogroup")):
2972
uid = pwd.getpwnam(name).pw_uid
2973
gid = pwd.getpwnam(group).pw_gid
2984
logger.debug("Did setuid/setgid to {}:{}".format(uid,
2986
except OSError as error:
2987
logger.warning("Failed to setuid/setgid to {}:{}: {}"
2988
.format(uid, gid, os.strerror(error.errno)))
2989
if error.errno != errno.EPERM:
2993
# Enable all possible GnuTLS debugging
2995
# "Use a log level over 10 to enable all debugging options."
2997
gnutls.global_set_log_level(11)
3000
def debug_gnutls(level, string):
3001
logger.debug("GnuTLS: %s", string[:-1])
3003
gnutls.global_set_log_function(debug_gnutls)
3005
# Redirect stdin so all checkers get /dev/null
3006
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
3007
os.dup2(null, sys.stdin.fileno())
3011
# Need to fork before connecting to D-Bus
3013
# Close all input and output, do double fork, etc.
3016
# multiprocessing will use threads, so before we use GLib we need
3017
# to inform GLib that threads will be used.
3021
# From the Avahi example code
3022
DBusGMainLoop(set_as_default=True)
3023
main_loop = GLib.MainLoop()
3024
bus = dbus.SystemBus()
3025
# End of Avahi example code
3028
bus_name = dbus.service.BusName("se.recompile.Mandos",
3031
old_bus_name = dbus.service.BusName(
3032
"se.bsnet.fukt.Mandos", bus,
3034
except dbus.exceptions.DBusException as e:
3035
logger.error("Disabling D-Bus:", exc_info=e)
3037
server_settings["use_dbus"] = False
3038
tcp_server.use_dbus = False
3040
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3041
service = AvahiServiceToSyslog(
3042
name = server_settings["servicename"],
3043
servicetype = "_mandos._tcp",
3044
protocol = protocol,
3046
if server_settings["interface"]:
3047
service.interface = if_nametoindex(
3048
server_settings["interface"].encode("utf-8"))
3050
global multiprocessing_manager
3051
multiprocessing_manager = multiprocessing.Manager()
3053
client_class = Client
3055
client_class = functools.partial(ClientDBus, bus = bus)
3057
client_settings = Client.config_parser(client_config)
3058
old_client_settings = {}
3061
# This is used to redirect stdout and stderr for checker processes
3063
wnull = open(os.devnull, "w") # A writable /dev/null
3064
# Only used if server is running in foreground but not in debug
3066
if debug or not foreground:
3069
# Get client data and settings from last running state.
3070
if server_settings["restore"]:
3072
with open(stored_state_path, "rb") as stored_state:
3073
if sys.version_info.major == 2:
3074
clients_data, old_client_settings = pickle.load(
3077
bytes_clients_data, bytes_old_client_settings = (
3078
pickle.load(stored_state, encoding = "bytes"))
3079
### Fix bytes to strings
3082
clients_data = { (key.decode("utf-8")
3083
if isinstance(key, bytes)
3086
bytes_clients_data.items() }
3087
del bytes_clients_data
3088
for key in clients_data:
3089
value = { (k.decode("utf-8")
3090
if isinstance(k, bytes) else k): v
3092
clients_data[key].items() }
3093
clients_data[key] = value
3095
value["client_structure"] = [
3097
if isinstance(s, bytes)
3099
value["client_structure"] ]
3101
for k in ("name", "host"):
3102
if isinstance(value[k], bytes):
3103
value[k] = value[k].decode("utf-8")
3104
## old_client_settings
3106
old_client_settings = {
3107
(key.decode("utf-8")
3108
if isinstance(key, bytes)
3111
bytes_old_client_settings.items() }
3112
del bytes_old_client_settings
3114
for value in old_client_settings.values():
3115
if isinstance(value["host"], bytes):
3116
value["host"] = (value["host"]
3118
os.remove(stored_state_path)
3119
except IOError as e:
3120
if e.errno == errno.ENOENT:
3121
logger.warning("Could not load persistent state:"
3122
" {}".format(os.strerror(e.errno)))
3124
logger.critical("Could not load persistent state:",
3127
except EOFError as e:
3128
logger.warning("Could not load persistent state: "
3132
with PGPEngine() as pgp:
3133
for client_name, client in clients_data.items():
3134
# Skip removed clients
3135
if client_name not in client_settings:
3138
# Decide which value to use after restoring saved state.
3139
# We have three different values: Old config file,
3140
# new config file, and saved state.
3141
# New config value takes precedence if it differs from old
3142
# config value, otherwise use saved state.
3143
for name, value in client_settings[client_name].items():
3145
# For each value in new config, check if it
3146
# differs from the old config value (Except for
3147
# the "secret" attribute)
3148
if (name != "secret"
3150
old_client_settings[client_name][name])):
3151
client[name] = value
3155
# Clients who has passed its expire date can still be
3156
# enabled if its last checker was successful. A Client
3157
# whose checker succeeded before we stored its state is
3158
# assumed to have successfully run all checkers during
3160
if client["enabled"]:
3161
if datetime.datetime.utcnow() >= client["expires"]:
3162
if not client["last_checked_ok"]:
3164
"disabling client {} - Client never "
3165
"performed a successful checker".format(
3167
client["enabled"] = False
3168
elif client["last_checker_status"] != 0:
3170
"disabling client {} - Client last"
3171
" checker failed with error code"
3174
client["last_checker_status"]))
3175
client["enabled"] = False
3177
client["expires"] = (
3178
datetime.datetime.utcnow()
3179
+ client["timeout"])
3180
logger.debug("Last checker succeeded,"
3181
" keeping {} enabled".format(
3184
client["secret"] = pgp.decrypt(
3185
client["encrypted_secret"],
3186
client_settings[client_name]["secret"])
3188
# If decryption fails, we use secret from new settings
3189
logger.debug("Failed to decrypt {} old secret".format(
3191
client["secret"] = (client_settings[client_name]
3194
# Add/remove clients based on new changes made to config
3195
for client_name in (set(old_client_settings)
3196
- set(client_settings)):
3197
del clients_data[client_name]
3198
for client_name in (set(client_settings)
3199
- set(old_client_settings)):
3200
clients_data[client_name] = client_settings[client_name]
3202
# Create all client objects
3203
for client_name, client in clients_data.items():
3204
tcp_server.clients[client_name] = client_class(
3207
server_settings = server_settings)
3209
if not tcp_server.clients:
3210
logger.warning("No clients defined")
3213
if pidfile is not None:
3217
print(pid, file=pidfile)
3219
logger.error("Could not write to file %r with PID %d",
3224
for termsig in (signal.SIGHUP, signal.SIGTERM):
3225
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3226
lambda: main_loop.quit() and False)
3230
@alternate_dbus_interfaces(
3231
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
3232
class MandosDBusService(DBusObjectWithObjectManager):
3233
"""A D-Bus proxy object"""
3236
dbus.service.Object.__init__(self, bus, "/")
3238
_interface = "se.recompile.Mandos"
3240
@dbus.service.signal(_interface, signature="o")
3241
def ClientAdded(self, objpath):
3245
@dbus.service.signal(_interface, signature="ss")
3246
def ClientNotFound(self, fingerprint, address):
3250
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3252
@dbus.service.signal(_interface, signature="os")
3253
def ClientRemoved(self, objpath, name):
3257
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3259
@dbus.service.method(_interface, out_signature="ao")
3260
def GetAllClients(self):
3262
return dbus.Array(c.dbus_object_path for c in
3263
tcp_server.clients.values())
3265
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3267
@dbus.service.method(_interface,
3268
out_signature="a{oa{sv}}")
3269
def GetAllClientsWithProperties(self):
3271
return dbus.Dictionary(
3272
{ c.dbus_object_path: c.GetAll(
3273
"se.recompile.Mandos.Client")
3274
for c in tcp_server.clients.values() },
3277
@dbus.service.method(_interface, in_signature="o")
3278
def RemoveClient(self, object_path):
3280
for c in tcp_server.clients.values():
3281
if c.dbus_object_path == object_path:
3282
del tcp_server.clients[c.name]
3283
c.remove_from_connection()
3284
# Don't signal the disabling
3285
c.disable(quiet=True)
3286
# Emit D-Bus signal for removal
3287
self.client_removed_signal(c)
3289
raise KeyError(object_path)
3293
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3294
out_signature = "a{oa{sa{sv}}}")
3295
def GetManagedObjects(self):
3297
return dbus.Dictionary(
3298
{ client.dbus_object_path:
3300
{ interface: client.GetAll(interface)
3302
client._get_all_interface_names()})
3303
for client in tcp_server.clients.values()})
3305
def client_added_signal(self, client):
3306
"""Send the new standard signal and the old signal"""
3308
# New standard signal
3309
self.InterfacesAdded(
3310
client.dbus_object_path,
3312
{ interface: client.GetAll(interface)
3314
client._get_all_interface_names()}))
3316
self.ClientAdded(client.dbus_object_path)
3318
def client_removed_signal(self, client):
3319
"""Send the new standard signal and the old signal"""
3321
# New standard signal
3322
self.InterfacesRemoved(
3323
client.dbus_object_path,
3324
client._get_all_interface_names())
3326
self.ClientRemoved(client.dbus_object_path,
3329
mandos_dbus_service = MandosDBusService()
3331
# Save modules to variables to exempt the modules from being
3332
# unloaded before the function registered with atexit() is run.
3333
mp = multiprocessing
3336
"Cleanup function; run on exit"
3340
mp.active_children()
3342
if not (tcp_server.clients or client_settings):
3345
# Store client before exiting. Secrets are encrypted with key
3346
# based on what config file has. If config file is
3347
# removed/edited, old secret will thus be unrecovable.
3349
with PGPEngine() as pgp:
3350
for client in tcp_server.clients.values():
3351
key = client_settings[client.name]["secret"]
3352
client.encrypted_secret = pgp.encrypt(client.secret,
3356
# A list of attributes that can not be pickled
3358
exclude = { "bus", "changedstate", "secret",
3359
"checker", "server_settings" }
3360
for name, typ in inspect.getmembers(dbus.service
3364
client_dict["encrypted_secret"] = (client
3366
for attr in client.client_structure:
3367
if attr not in exclude:
3368
client_dict[attr] = getattr(client, attr)
3370
clients[client.name] = client_dict
3371
del client_settings[client.name]["secret"]
3374
with tempfile.NamedTemporaryFile(
3378
dir=os.path.dirname(stored_state_path),
3379
delete=False) as stored_state:
3380
pickle.dump((clients, client_settings), stored_state,
3382
tempname = stored_state.name
3383
os.rename(tempname, stored_state_path)
3384
except (IOError, OSError) as e:
3390
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3391
logger.warning("Could not save persistent state: {}"
3392
.format(os.strerror(e.errno)))
3394
logger.warning("Could not save persistent state:",
3398
# Delete all clients, and settings from config
3399
while tcp_server.clients:
3400
name, client = tcp_server.clients.popitem()
3402
client.remove_from_connection()
3403
# Don't signal the disabling
3404
client.disable(quiet=True)
3405
# Emit D-Bus signal for removal
3407
mandos_dbus_service.client_removed_signal(client)
3408
client_settings.clear()
3410
atexit.register(cleanup)
3412
for client in tcp_server.clients.values():
3414
# Emit D-Bus signal for adding
3415
mandos_dbus_service.client_added_signal(client)
3416
# Need to initiate checking of clients
3418
client.init_checker()
3421
tcp_server.server_activate()
3423
# Find out what port we got
3425
service.port = tcp_server.socket.getsockname()[1]
3427
logger.info("Now listening on address %r, port %d,"
3428
" flowinfo %d, scope_id %d",
3429
*tcp_server.socket.getsockname())
3431
logger.info("Now listening on address %r, port %d",
3432
*tcp_server.socket.getsockname())
3434
#service.interface = tcp_server.socket.getsockname()[3]
3438
# From the Avahi example code
3441
except dbus.exceptions.DBusException as error:
3442
logger.critical("D-Bus Exception", exc_info=error)
3445
# End of Avahi example code
3447
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3448
lambda *args, **kwargs:
3449
(tcp_server.handle_request
3450
(*args[2:], **kwargs) or True))
3452
logger.debug("Starting main loop")
3454
except AvahiError as error:
3455
logger.critical("Avahi Error", exc_info=error)
3458
except KeyboardInterrupt:
3460
print("", file=sys.stderr)
3461
logger.debug("Server received KeyboardInterrupt")
3462
logger.debug("Server exiting")
3463
# Must run before the D-Bus bus name gets deregistered
3467
if __name__ == '__main__':
268
# Parse the time arguments
270
options.timeout = string_to_delta(options.timeout)
272
parser.error("option --timeout: Unparseable time")
275
options.interval = string_to_delta(options.interval)
277
parser.error("option --interval: Unparseable time")
279
cert = gnutls.crypto.X509Certificate(open(options.cert).read())
280
key = gnutls.crypto.X509PrivateKey(open(options.key).read())
281
ca = gnutls.crypto.X509Certificate(open(options.ca).read())
282
crl = gnutls.crypto.X509CRL(open(options.crl).read())
283
cred = gnutls.connection.X509Credentials(cert, key, [ca], [crl])
287
client_config_object = ConfigParser.SafeConfigParser(defaults)
288
client_config_object.read("mandos-clients.conf")
289
clients = Set(Client(name=section, options=options,
290
**(dict(client_config_object\
292
for section in client_config_object.sections())
295
udp_server = IPv6_UDPServer((in6addr_any, options.port),
299
tcp_server = IPv6_TCPServer((in6addr_any, options.port),
309
next_stop = min(client.next_stop() for client in clients)
310
now = datetime.datetime.now()
312
delay = next_stop - now
313
delay_seconds = (delay.days * 24 * 60 * 60
315
+ delay.microseconds / 1000000)
316
clients_with_checkers = tuple(client for client in
320
input_checks = (udp_server, tcp_server) \
321
+ clients_with_checkers
322
print "Waiting for network",
323
if clients_with_checkers:
324
print "and checkers for:",
325
for client in clients_with_checkers:
328
input, out, err = select.select(input_checks, (), (),
333
for client in clients:
334
if client.it_is_time_to_check(now=now) and \
335
client.checker is None:
336
print "Starting checker for client %(name)s" \
338
client.start_checker()
339
# delete timed-out clients
340
for client in clients.copy():
341
if not client.still_valid(now=now):
343
print "Removing client %(name)s" % vars(client)
344
clients.remove(client)
345
except KeyboardInterrupt:
349
for client in clients:
350
client.stop_checker()
353
if __name__ == "__main__":