70
import cPickle as pickle
63
import cPickle as pickle
73
64
import multiprocessing
82
68
import dbus.service
84
from gi.repository import GLib
85
71
from dbus.mainloop.glib import DBusGMainLoop
88
74
import xml.dom.minidom
91
if sys.version_info.major == 2:
94
# Try to find the value of SO_BINDTODEVICE:
96
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
97
# newer, and it is also the most natural place for it:
98
78
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
99
79
except AttributeError:
101
# This is where SO_BINDTODEVICE was up to and including Python
103
81
from IN import SO_BINDTODEVICE
104
82
except ImportError:
105
# In Python 2.7 it seems to have been removed entirely.
106
# Try running the C preprocessor:
108
cc = subprocess.Popen(["cc", "--language=c", "-E",
110
stdin=subprocess.PIPE,
111
stdout=subprocess.PIPE)
112
stdout = cc.communicate(
113
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
114
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
115
except (OSError, ValueError, IndexError):
117
SO_BINDTODEVICE = None
119
if sys.version_info.major == 2:
122
if sys.version_info < (3, 2):
123
configparser.Configparser = configparser.SafeConfigParser
126
stored_state_file = "clients.pickle"
128
logger = logging.getLogger()
132
if_nametoindex = ctypes.cdll.LoadLibrary(
133
ctypes.util.find_library("c")).if_nametoindex
134
except (OSError, AttributeError):
136
def if_nametoindex(interface):
137
"Get an interface index the hard way, i.e. using fcntl()"
138
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
139
with contextlib.closing(socket.socket()) as s:
140
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
141
struct.pack(b"16s16x", interface))
142
interface_index = struct.unpack("I", ifreq[16:20])[0]
143
return interface_index
146
def copy_function(func):
147
"""Make a copy of a function"""
148
if sys.version_info.major == 2:
149
return types.FunctionType(func.func_code,
155
return types.FunctionType(func.__code__,
162
def initlogger(debug, level=logging.WARNING):
163
"""init logger and add loglevel"""
166
syslogger = (logging.handlers.SysLogHandler(
167
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
169
syslogger.setFormatter(logging.Formatter
170
('Mandos [%(process)d]: %(levelname)s:'
172
logger.addHandler(syslogger)
175
console = logging.StreamHandler()
176
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
180
logger.addHandler(console)
181
logger.setLevel(level)
184
class PGPError(Exception):
185
"""Exception if encryption/decryption fails"""
190
"""A simple class for OpenPGP symmetric encryption & decryption"""
193
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
196
output = subprocess.check_output(["gpgconf"])
197
for line in output.splitlines():
198
name, text, path = line.split(b":")
203
if e.errno != errno.ENOENT:
205
self.gnupgargs = ['--batch',
206
'--homedir', self.tempdir,
209
# Only GPG version 1 has the --no-use-agent option.
210
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
211
self.gnupgargs.append("--no-use-agent")
216
def __exit__(self, exc_type, exc_value, traceback):
224
if self.tempdir is not None:
225
# Delete contents of tempdir
226
for root, dirs, files in os.walk(self.tempdir,
228
for filename in files:
229
os.remove(os.path.join(root, filename))
231
os.rmdir(os.path.join(root, dirname))
233
os.rmdir(self.tempdir)
236
def password_encode(self, password):
237
# Passphrase can not be empty and can not contain newlines or
238
# NUL bytes. So we prefix it and hex encode it.
239
encoded = b"mandos" + binascii.hexlify(password)
240
if len(encoded) > 2048:
241
# GnuPG can't handle long passwords, so encode differently
242
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
243
.replace(b"\n", b"\\n")
244
.replace(b"\0", b"\\x00"))
247
def encrypt(self, data, password):
248
passphrase = self.password_encode(password)
249
with tempfile.NamedTemporaryFile(
250
dir=self.tempdir) as passfile:
251
passfile.write(passphrase)
253
proc = subprocess.Popen([self.gpg, '--symmetric',
257
stdin=subprocess.PIPE,
258
stdout=subprocess.PIPE,
259
stderr=subprocess.PIPE)
260
ciphertext, err = proc.communicate(input=data)
261
if proc.returncode != 0:
265
def decrypt(self, data, password):
266
passphrase = self.password_encode(password)
267
with tempfile.NamedTemporaryFile(
268
dir=self.tempdir) as passfile:
269
passfile.write(passphrase)
271
proc = subprocess.Popen([self.gpg, '--decrypt',
275
stdin=subprocess.PIPE,
276
stdout=subprocess.PIPE,
277
stderr=subprocess.PIPE)
278
decrypted_plaintext, err = proc.communicate(input=data)
279
if proc.returncode != 0:
281
return decrypted_plaintext
284
# Pretend that we have an Avahi module
286
"""This isn't so much a class as it is a module-like namespace."""
287
IF_UNSPEC = -1 # avahi-common/address.h
288
PROTO_UNSPEC = -1 # avahi-common/address.h
289
PROTO_INET = 0 # avahi-common/address.h
290
PROTO_INET6 = 1 # avahi-common/address.h
291
DBUS_NAME = "org.freedesktop.Avahi"
292
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
293
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
294
DBUS_PATH_SERVER = "/"
297
def string_array_to_txt_array(t):
298
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
299
for s in t), signature="ay")
300
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
301
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
302
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
303
SERVER_INVALID = 0 # avahi-common/defs.h
304
SERVER_REGISTERING = 1 # avahi-common/defs.h
305
SERVER_RUNNING = 2 # avahi-common/defs.h
306
SERVER_COLLISION = 3 # avahi-common/defs.h
307
SERVER_FAILURE = 4 # avahi-common/defs.h
83
SO_BINDTODEVICE = None
88
#logger = logging.getLogger('mandos')
89
logger = logging.Logger('mandos')
90
syslogger = (logging.handlers.SysLogHandler
91
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
92
address = str("/dev/log")))
93
syslogger.setFormatter(logging.Formatter
94
('Mandos [%(process)d]: %(levelname)s:'
96
logger.addHandler(syslogger)
98
console = logging.StreamHandler()
99
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
102
logger.addHandler(console)
310
104
class AvahiError(Exception):
311
105
def __init__(self, value, *args, **kwargs):
312
106
self.value = value
313
return super(AvahiError, self).__init__(value, *args,
107
super(AvahiError, self).__init__(value, *args, **kwargs)
108
def __unicode__(self):
109
return unicode(repr(self.value))
317
111
class AvahiServiceError(AvahiError):
321
114
class AvahiGroupError(AvahiError):
118
class AvahiService(object):
326
119
"""An Avahi (Zeroconf) service.
329
122
interface: integer; avahi.IF_UNSPEC or an interface index.
330
123
Used to optionally bind to the specified interface.
331
124
name: string; Example: 'Mandos'
332
125
type: string; Example: '_mandos._tcp'.
333
See <https://www.iana.org/assignments/service-names-port-numbers>
126
See <http://www.dns-sd.org/ServiceTypes.html>
334
127
port: integer; what port to announce
335
128
TXT: list of strings; TXT record for the service
336
129
domain: string; Domain to publish on, default to .local if empty.
495
262
follow_name_owner_changes=True),
496
263
avahi.DBUS_INTERFACE_SERVER)
497
264
self.server.connect_to_signal("StateChanged",
498
self.server_state_changed)
265
self.server_state_changed)
499
266
self.server_state_changed(self.server.GetState())
502
class AvahiServiceToSyslog(AvahiService):
503
def rename(self, *args, **kwargs):
504
"""Add the new name to the syslog messages"""
505
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
506
syslogger.setFormatter(logging.Formatter(
507
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
512
# Pretend that we have a GnuTLS module
514
"""This isn't so much a class as it is a module-like namespace."""
516
library = ctypes.util.find_library("gnutls")
518
library = ctypes.util.find_library("gnutls-deb0")
519
_library = ctypes.cdll.LoadLibrary(library)
522
# Unless otherwise indicated, the constants and types below are
523
# all from the gnutls/gnutls.h C header file.
534
E_NO_CERTIFICATE_FOUND = -49
539
KEYID_USE_SHA256 = 1 # gnutls/x509.h
540
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
543
class session_int(ctypes.Structure):
545
session_t = ctypes.POINTER(session_int)
547
class certificate_credentials_st(ctypes.Structure):
549
certificate_credentials_t = ctypes.POINTER(
550
certificate_credentials_st)
551
certificate_type_t = ctypes.c_int
553
class datum_t(ctypes.Structure):
554
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
555
('size', ctypes.c_uint)]
557
class openpgp_crt_int(ctypes.Structure):
559
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
560
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
561
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
562
credentials_type_t = ctypes.c_int
563
transport_ptr_t = ctypes.c_void_p
564
close_request_t = ctypes.c_int
567
class Error(Exception):
568
def __init__(self, message=None, code=None, args=()):
569
# Default usage is by a message string, but if a return
570
# code is passed, convert it to a string with
573
if message is None and code is not None:
574
message = gnutls.strerror(code)
575
return super(gnutls.Error, self).__init__(
578
class CertificateSecurityError(Error):
584
self._c_object = gnutls.certificate_credentials_t()
585
gnutls.certificate_allocate_credentials(
586
ctypes.byref(self._c_object))
587
self.type = gnutls.CRD_CERTIFICATE
590
gnutls.certificate_free_credentials(self._c_object)
593
def __init__(self, socket, credentials=None):
594
self._c_object = gnutls.session_t()
595
gnutls_flags = gnutls.CLIENT
596
if gnutls.check_version(b"3.5.6"):
597
gnutls_flags |= gnutls.NO_TICKETS
599
gnutls_flags |= gnutls.ENABLE_RAWPK
600
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
602
gnutls.set_default_priority(self._c_object)
603
gnutls.transport_set_ptr(self._c_object, socket.fileno())
604
gnutls.handshake_set_private_extensions(self._c_object,
607
if credentials is None:
608
credentials = gnutls.Credentials()
609
gnutls.credentials_set(self._c_object, credentials.type,
610
ctypes.cast(credentials._c_object,
612
self.credentials = credentials
615
gnutls.deinit(self._c_object)
618
return gnutls.handshake(self._c_object)
620
def send(self, data):
624
data_len -= gnutls.record_send(self._c_object,
629
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
631
# Error handling functions
632
def _error_code(result):
633
"""A function to raise exceptions on errors, suitable
634
for the 'restype' attribute on ctypes functions"""
637
if result == gnutls.E_NO_CERTIFICATE_FOUND:
638
raise gnutls.CertificateSecurityError(code=result)
639
raise gnutls.Error(code=result)
641
def _retry_on_error(result, func, arguments):
642
"""A function to retry on some errors, suitable
643
for the 'errcheck' attribute on ctypes functions"""
645
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
646
return _error_code(result)
647
result = func(*arguments)
650
# Unless otherwise indicated, the function declarations below are
651
# all from the gnutls/gnutls.h C header file.
654
priority_set_direct = _library.gnutls_priority_set_direct
655
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
656
ctypes.POINTER(ctypes.c_char_p)]
657
priority_set_direct.restype = _error_code
659
init = _library.gnutls_init
660
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
661
init.restype = _error_code
663
set_default_priority = _library.gnutls_set_default_priority
664
set_default_priority.argtypes = [session_t]
665
set_default_priority.restype = _error_code
667
record_send = _library.gnutls_record_send
668
record_send.argtypes = [session_t, ctypes.c_void_p,
670
record_send.restype = ctypes.c_ssize_t
671
record_send.errcheck = _retry_on_error
673
certificate_allocate_credentials = (
674
_library.gnutls_certificate_allocate_credentials)
675
certificate_allocate_credentials.argtypes = [
676
ctypes.POINTER(certificate_credentials_t)]
677
certificate_allocate_credentials.restype = _error_code
679
certificate_free_credentials = (
680
_library.gnutls_certificate_free_credentials)
681
certificate_free_credentials.argtypes = [
682
certificate_credentials_t]
683
certificate_free_credentials.restype = None
685
handshake_set_private_extensions = (
686
_library.gnutls_handshake_set_private_extensions)
687
handshake_set_private_extensions.argtypes = [session_t,
689
handshake_set_private_extensions.restype = None
691
credentials_set = _library.gnutls_credentials_set
692
credentials_set.argtypes = [session_t, credentials_type_t,
694
credentials_set.restype = _error_code
696
strerror = _library.gnutls_strerror
697
strerror.argtypes = [ctypes.c_int]
698
strerror.restype = ctypes.c_char_p
700
certificate_type_get = _library.gnutls_certificate_type_get
701
certificate_type_get.argtypes = [session_t]
702
certificate_type_get.restype = _error_code
704
certificate_get_peers = _library.gnutls_certificate_get_peers
705
certificate_get_peers.argtypes = [session_t,
706
ctypes.POINTER(ctypes.c_uint)]
707
certificate_get_peers.restype = ctypes.POINTER(datum_t)
709
global_set_log_level = _library.gnutls_global_set_log_level
710
global_set_log_level.argtypes = [ctypes.c_int]
711
global_set_log_level.restype = None
713
global_set_log_function = _library.gnutls_global_set_log_function
714
global_set_log_function.argtypes = [log_func]
715
global_set_log_function.restype = None
717
deinit = _library.gnutls_deinit
718
deinit.argtypes = [session_t]
719
deinit.restype = None
721
handshake = _library.gnutls_handshake
722
handshake.argtypes = [session_t]
723
handshake.restype = _error_code
724
handshake.errcheck = _retry_on_error
726
transport_set_ptr = _library.gnutls_transport_set_ptr
727
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
728
transport_set_ptr.restype = None
730
bye = _library.gnutls_bye
731
bye.argtypes = [session_t, close_request_t]
732
bye.restype = _error_code
733
bye.errcheck = _retry_on_error
735
check_version = _library.gnutls_check_version
736
check_version.argtypes = [ctypes.c_char_p]
737
check_version.restype = ctypes.c_char_p
739
_need_version = b"3.3.0"
740
if check_version(_need_version) is None:
741
raise self.Error("Needs GnuTLS {} or later"
742
.format(_need_version))
744
_tls_rawpk_version = b"3.6.6"
745
has_rawpk = bool(check_version(_tls_rawpk_version))
749
class pubkey_st(ctypes.Structure):
751
pubkey_t = ctypes.POINTER(pubkey_st)
753
x509_crt_fmt_t = ctypes.c_int
755
# All the function declarations below are from gnutls/abstract.h
756
pubkey_init = _library.gnutls_pubkey_init
757
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
758
pubkey_init.restype = _error_code
760
pubkey_import = _library.gnutls_pubkey_import
761
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
763
pubkey_import.restype = _error_code
765
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
766
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
767
ctypes.POINTER(ctypes.c_ubyte),
768
ctypes.POINTER(ctypes.c_size_t)]
769
pubkey_get_key_id.restype = _error_code
771
pubkey_deinit = _library.gnutls_pubkey_deinit
772
pubkey_deinit.argtypes = [pubkey_t]
773
pubkey_deinit.restype = None
775
# All the function declarations below are from gnutls/openpgp.h
777
openpgp_crt_init = _library.gnutls_openpgp_crt_init
778
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
779
openpgp_crt_init.restype = _error_code
781
openpgp_crt_import = _library.gnutls_openpgp_crt_import
782
openpgp_crt_import.argtypes = [openpgp_crt_t,
783
ctypes.POINTER(datum_t),
785
openpgp_crt_import.restype = _error_code
787
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
788
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
789
ctypes.POINTER(ctypes.c_uint)]
790
openpgp_crt_verify_self.restype = _error_code
792
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
793
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
794
openpgp_crt_deinit.restype = None
796
openpgp_crt_get_fingerprint = (
797
_library.gnutls_openpgp_crt_get_fingerprint)
798
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
802
openpgp_crt_get_fingerprint.restype = _error_code
804
if check_version(b"3.6.4"):
805
certificate_type_get2 = _library.gnutls_certificate_type_get2
806
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
807
certificate_type_get2.restype = _error_code
809
# Remove non-public functions
810
del _error_code, _retry_on_error
813
def call_pipe(connection, # : multiprocessing.Connection
814
func, *args, **kwargs):
815
"""This function is meant to be called by multiprocessing.Process
817
This function runs func(*args, **kwargs), and writes the resulting
818
return value on the provided multiprocessing.Connection.
820
connection.send(func(*args, **kwargs))
269
def _timedelta_to_milliseconds(td):
270
"Convert a datetime.timedelta() to milliseconds"
271
return ((td.days * 24 * 60 * 60 * 1000)
272
+ (td.seconds * 1000)
273
+ (td.microseconds // 1000))
275
class Client(object):
825
276
"""A representation of a client host served by this server.
828
approved: bool(); 'None' if not yet approved/disapproved
279
_approved: bool(); 'None' if not yet approved/disapproved
829
280
approval_delay: datetime.timedelta(); Time to wait for approval
830
281
approval_duration: datetime.timedelta(); Duration of one approval
831
checker: multiprocessing.Process(); a running checker process used
832
to see if the client lives. 'None' if no process is
834
checker_callback_tag: a GLib event source tag, or None
282
checker: subprocess.Popen(); a running checker process used
283
to see if the client lives.
284
'None' if no process is running.
285
checker_callback_tag: a gobject event source tag, or None
835
286
checker_command: string; External command which is run to check
836
287
if client lives. %() expansions are done at
837
288
runtime with vars(self) as dict, so that for
838
289
instance %(name)s can be used in the command.
839
checker_initiator_tag: a GLib event source tag, or None
290
checker_initiator_tag: a gobject event source tag, or None
840
291
created: datetime.datetime(); (UTC) object creation
841
client_structure: Object describing what attributes a client has
842
and is used for storing the client at exit
843
292
current_checker_command: string; current running checker_command
844
disable_initiator_tag: a GLib event source tag, or None
293
disable_hook: If set, called by disable() as disable_hook(self)
294
disable_initiator_tag: a gobject event source tag, or None
846
296
fingerprint: string (40 or 32 hexadecimal digits); used to
847
uniquely identify an OpenPGP client
848
key_id: string (64 hexadecimal digits); used to uniquely identify
849
a client using raw public keys
297
uniquely identify the client
850
298
host: string; available for use by the checker command
851
299
interval: datetime.timedelta(); How often to start a new checker
852
300
last_approval_request: datetime.datetime(); (UTC) or None
853
301
last_checked_ok: datetime.datetime(); (UTC) or None
854
last_checker_status: integer between 0 and 255 reflecting exit
855
status of last checker. -1 reflects crashed
856
checker, -2 means no checker completed yet.
857
last_checker_signal: The signal which killed the last checker, if
858
last_checker_status is -1
859
last_enabled: datetime.datetime(); (UTC) or None
302
last_enabled: datetime.datetime(); (UTC)
860
303
name: string; from the config file, used in log messages and
861
304
D-Bus identifiers
862
305
secret: bytestring; sent verbatim (over TLS) to client
863
306
timeout: datetime.timedelta(); How long from last_checked_ok
864
307
until this client is disabled
865
extended_timeout: extra long timeout when secret has been sent
308
extended_timeout: extra long timeout when password has been sent
866
309
runtime_expansions: Allowed attributes for runtime expansion.
867
310
expires: datetime.datetime(); time (UTC) when a client will be
868
311
disabled, or None
869
server_settings: The server_settings dict from main()
872
314
runtime_expansions = ("approval_delay", "approval_duration",
873
"created", "enabled", "expires", "key_id",
874
"fingerprint", "host", "interval",
875
"last_approval_request", "last_checked_ok",
315
"created", "enabled", "fingerprint",
316
"host", "interval", "last_checked_ok",
876
317
"last_enabled", "name", "timeout")
879
"extended_timeout": "PT15M",
881
"checker": "fping -q -- %%(host)s",
883
"approval_delay": "PT0S",
884
"approval_duration": "PT1S",
885
"approved_by_default": "True",
890
def config_parser(config):
891
"""Construct a new dict of client settings of this form:
892
{ client_name: {setting_name: value, ...}, ...}
893
with exceptions for any special settings as defined above.
894
NOTE: Must be a pure function. Must return the same result
895
value given the same arguments.
898
for client_name in config.sections():
899
section = dict(config.items(client_name))
900
client = settings[client_name] = {}
902
client["host"] = section["host"]
903
# Reformat values from string types to Python types
904
client["approved_by_default"] = config.getboolean(
905
client_name, "approved_by_default")
906
client["enabled"] = config.getboolean(client_name,
909
# Uppercase and remove spaces from key_id and fingerprint
910
# for later comparison purposes with return value from the
911
# key_id() and fingerprint() functions
912
client["key_id"] = (section.get("key_id", "").upper()
914
client["fingerprint"] = (section["fingerprint"].upper()
916
if "secret" in section:
917
client["secret"] = codecs.decode(section["secret"]
920
elif "secfile" in section:
921
with open(os.path.expanduser(os.path.expandvars
922
(section["secfile"])),
924
client["secret"] = secfile.read()
926
raise TypeError("No secret or secfile for section {}"
928
client["timeout"] = string_to_delta(section["timeout"])
929
client["extended_timeout"] = string_to_delta(
930
section["extended_timeout"])
931
client["interval"] = string_to_delta(section["interval"])
932
client["approval_delay"] = string_to_delta(
933
section["approval_delay"])
934
client["approval_duration"] = string_to_delta(
935
section["approval_duration"])
936
client["checker_command"] = section["checker"]
937
client["last_approval_request"] = None
938
client["last_checked_ok"] = None
939
client["last_checker_status"] = -2
943
def __init__(self, settings, name=None, server_settings=None):
319
def timeout_milliseconds(self):
320
"Return the 'timeout' attribute in milliseconds"
321
return _timedelta_to_milliseconds(self.timeout)
323
def extended_timeout_milliseconds(self):
324
"Return the 'extended_timeout' attribute in milliseconds"
325
return _timedelta_to_milliseconds(self.extended_timeout)
327
def interval_milliseconds(self):
328
"Return the 'interval' attribute in milliseconds"
329
return _timedelta_to_milliseconds(self.interval)
331
def approval_delay_milliseconds(self):
332
return _timedelta_to_milliseconds(self.approval_delay)
334
def __init__(self, name = None, disable_hook=None, config=None):
335
"""Note: the 'checker' key in 'config' sets the
336
'checker_command' attribute and *not* the 'checker'
945
if server_settings is None:
947
self.server_settings = server_settings
948
# adding all client settings
949
for setting, value in settings.items():
950
setattr(self, setting, value)
953
if not hasattr(self, "last_enabled"):
954
self.last_enabled = datetime.datetime.utcnow()
955
if not hasattr(self, "expires"):
956
self.expires = (datetime.datetime.utcnow()
959
self.last_enabled = None
962
341
logger.debug("Creating client %r", self.name)
963
logger.debug(" Key ID: %s", self.key_id)
342
# Uppercase and remove spaces from fingerprint for later
343
# comparison purposes with return value from the fingerprint()
345
self.fingerprint = (config["fingerprint"].upper()
964
347
logger.debug(" Fingerprint: %s", self.fingerprint)
965
self.created = settings.get("created",
966
datetime.datetime.utcnow())
968
# attributes specific for this server instance
348
if "secret" in config:
349
self.secret = config["secret"].decode("base64")
350
elif "secfile" in config:
351
with open(os.path.expanduser(os.path.expandvars
352
(config["secfile"])),
354
self.secret = secfile.read()
356
raise TypeError("No secret or secfile for client %s"
358
self.host = config.get("host", "")
359
self.created = datetime.datetime.utcnow()
361
self.last_approval_request = None
362
self.last_enabled = None
363
self.last_checked_ok = None
364
self.timeout = string_to_delta(config["timeout"])
365
self.extended_timeout = string_to_delta(config
366
["extended_timeout"])
367
self.interval = string_to_delta(config["interval"])
368
self.disable_hook = disable_hook
969
369
self.checker = None
970
370
self.checker_initiator_tag = None
971
371
self.disable_initiator_tag = None
972
373
self.checker_callback_tag = None
374
self.checker_command = config["checker"]
973
375
self.current_checker_command = None
376
self.last_connect = None
377
self._approved = None
378
self.approved_by_default = config.get("approved_by_default",
975
380
self.approvals_pending = 0
976
self.changedstate = multiprocessing_manager.Condition(
977
multiprocessing_manager.Lock())
978
self.client_structure = [attr
979
for attr in self.__dict__.keys()
980
if not attr.startswith("_")]
981
self.client_structure.append("client_structure")
983
for name, t in inspect.getmembers(
984
type(self), lambda obj: isinstance(obj, property)):
985
if not name.startswith("_"):
986
self.client_structure.append(name)
988
# Send notice to process children that client state has changed
381
self.approval_delay = string_to_delta(
382
config["approval_delay"])
383
self.approval_duration = string_to_delta(
384
config["approval_duration"])
385
self.changedstate = (multiprocessing_manager
386
.Condition(multiprocessing_manager
989
389
def send_changedstate(self):
990
with self.changedstate:
991
self.changedstate.notify_all()
390
self.changedstate.acquire()
391
self.changedstate.notify_all()
392
self.changedstate.release()
993
394
def enable(self):
994
395
"""Start this client's checker and timeout hooks"""
995
396
if getattr(self, "enabled", False):
996
397
# Already enabled
399
self.send_changedstate()
400
# Schedule a new checker to be started an 'interval' from now,
401
# and every interval from then on.
402
self.checker_initiator_tag = (gobject.timeout_add
403
(self.interval_milliseconds(),
405
# Schedule a disable() when 'timeout' has passed
998
406
self.expires = datetime.datetime.utcnow() + self.timeout
407
self.disable_initiator_tag = (gobject.timeout_add
408
(self.timeout_milliseconds(),
999
410
self.enabled = True
1000
411
self.last_enabled = datetime.datetime.utcnow()
1002
self.send_changedstate()
412
# Also start a new checker *right now*.
1004
415
def disable(self, quiet=True):
1005
416
"""Disable this client."""
1006
417
if not getattr(self, "enabled", False):
420
self.send_changedstate()
1009
422
logger.info("Disabling client %s", self.name)
1010
if getattr(self, "disable_initiator_tag", None) is not None:
1011
GLib.source_remove(self.disable_initiator_tag)
423
if getattr(self, "disable_initiator_tag", False):
424
gobject.source_remove(self.disable_initiator_tag)
1012
425
self.disable_initiator_tag = None
1013
426
self.expires = None
1014
if getattr(self, "checker_initiator_tag", None) is not None:
1015
GLib.source_remove(self.checker_initiator_tag)
427
if getattr(self, "checker_initiator_tag", False):
428
gobject.source_remove(self.checker_initiator_tag)
1016
429
self.checker_initiator_tag = None
1017
430
self.stop_checker()
431
if self.disable_hook:
432
self.disable_hook(self)
1018
433
self.enabled = False
1020
self.send_changedstate()
1021
# Do not run this again if called by a GLib.timeout_add
434
# Do not run this again if called by a gobject.timeout_add
1024
437
def __del__(self):
438
self.disable_hook = None
1027
def init_checker(self):
1028
# Schedule a new checker to be started an 'interval' from now,
1029
# and every interval from then on.
1030
if self.checker_initiator_tag is not None:
1031
GLib.source_remove(self.checker_initiator_tag)
1032
self.checker_initiator_tag = GLib.timeout_add(
1033
int(self.interval.total_seconds() * 1000),
1035
# Schedule a disable() when 'timeout' has passed
1036
if self.disable_initiator_tag is not None:
1037
GLib.source_remove(self.disable_initiator_tag)
1038
self.disable_initiator_tag = GLib.timeout_add(
1039
int(self.timeout.total_seconds() * 1000), self.disable)
1040
# Also start a new checker *right now*.
1041
self.start_checker()
1043
def checker_callback(self, source, condition, connection,
441
def checker_callback(self, pid, condition, command):
1045
442
"""The checker has completed, so take appropriate actions."""
1046
# Read return code from connection (see call_pipe)
1047
returncode = connection.recv()
1050
443
self.checker_callback_tag = None
1051
444
self.checker = None
1054
self.last_checker_status = returncode
1055
self.last_checker_signal = None
1056
if self.last_checker_status == 0:
445
if os.WIFEXITED(condition):
446
exitstatus = os.WEXITSTATUS(condition)
1057
448
logger.info("Checker for %(name)s succeeded",
1059
450
self.checked_ok()
1061
logger.info("Checker for %(name)s failed", vars(self))
452
logger.info("Checker for %(name)s failed",
1063
self.last_checker_status = -1
1064
self.last_checker_signal = -returncode
1065
455
logger.warning("Checker for %(name)s crashed?",
1069
def checked_ok(self):
1070
"""Assert that the client has been seen, alive and well."""
1071
self.last_checked_ok = datetime.datetime.utcnow()
1072
self.last_checker_status = 0
1073
self.last_checker_signal = None
1076
def bump_timeout(self, timeout=None):
1077
"""Bump up the timeout for this client."""
458
def checked_ok(self, timeout=None):
459
"""Bump up the timeout for this client.
461
This should only be called when the client has been seen,
1078
464
if timeout is None:
1079
465
timeout = self.timeout
1080
if self.disable_initiator_tag is not None:
1081
GLib.source_remove(self.disable_initiator_tag)
1082
self.disable_initiator_tag = None
1083
if getattr(self, "enabled", False):
1084
self.disable_initiator_tag = GLib.timeout_add(
1085
int(timeout.total_seconds() * 1000), self.disable)
1086
self.expires = datetime.datetime.utcnow() + timeout
466
self.last_checked_ok = datetime.datetime.utcnow()
467
gobject.source_remove(self.disable_initiator_tag)
468
self.disable_initiator_tag = (gobject.timeout_add
469
(_timedelta_to_milliseconds
470
(timeout), self.disable))
471
self.expires = datetime.datetime.utcnow() + timeout
1088
473
def need_approval(self):
1089
474
self.last_approval_request = datetime.datetime.utcnow()
1091
476
def start_checker(self):
1092
477
"""Start a new checker subprocess if one is not running.
1094
479
If a checker already exists, leave it running and do
1096
481
# The reason for not killing a running checker is that if we
1097
# did that, and if a checker (for some reason) started running
1098
# slowly and taking more than 'interval' time, then the client
1099
# would inevitably timeout, since no checker would get a
1100
# chance to run to completion. If we instead leave running
482
# did that, then if a checker (for some reason) started
483
# running slowly and taking more than 'interval' time, the
484
# client would inevitably timeout, since no checker would get
485
# a chance to run to completion. If we instead leave running
1101
486
# checkers alone, the checker would have to take more time
1102
487
# than 'timeout' for the client to be disabled, which is as it
1105
if self.checker is not None and not self.checker.is_alive():
1106
logger.warning("Checker was not alive; joining")
490
# If a checker exists, make sure it is not a zombie
492
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
493
except (AttributeError, OSError) as error:
494
if (isinstance(error, OSError)
495
and error.errno != errno.ECHILD):
499
logger.warning("Checker was a zombie")
500
gobject.source_remove(self.checker_callback_tag)
501
self.checker_callback(pid, status,
502
self.current_checker_command)
1109
503
# Start a new checker if needed
1110
504
if self.checker is None:
1111
# Escape attributes for the shell
1113
attr: re.escape(str(getattr(self, attr)))
1114
for attr in self.runtime_expansions}
1116
command = self.checker_command % escaped_attrs
1117
except TypeError as error:
1118
logger.error('Could not format string "%s"',
1119
self.checker_command,
1121
return True # Try again later
506
# In case checker_command has exactly one % operator
507
command = self.checker_command % self.host
509
# Escape attributes for the shell
510
escaped_attrs = dict(
512
re.escape(unicode(str(getattr(self, attr, "")),
516
self.runtime_expansions)
519
command = self.checker_command % escaped_attrs
520
except TypeError as error:
521
logger.error('Could not format string "%s":'
522
' %s', self.checker_command, error)
523
return True # Try again later
1122
524
self.current_checker_command = command
1123
logger.info("Starting checker %r for %s", command,
1125
# We don't need to redirect stdout and stderr, since
1126
# in normal mode, that is already done by daemon(),
1127
# and in debug mode we don't want to. (Stdin is
1128
# always replaced by /dev/null.)
1129
# The exception is when not debugging but nevertheless
1130
# running in the foreground; use the previously
1132
popen_args = {"close_fds": True,
1135
if (not self.server_settings["debug"]
1136
and self.server_settings["foreground"]):
1137
popen_args.update({"stdout": wnull,
1139
pipe = multiprocessing.Pipe(duplex=False)
1140
self.checker = multiprocessing.Process(
1142
args=(pipe[1], subprocess.call, command),
1144
self.checker.start()
1145
self.checker_callback_tag = GLib.io_add_watch(
1146
pipe[0].fileno(), GLib.IO_IN,
1147
self.checker_callback, pipe[0], command)
1148
# Re-run this periodically if run by GLib.timeout_add
526
logger.info("Starting checker %r for %s",
528
# We don't need to redirect stdout and stderr, since
529
# in normal mode, that is already done by daemon(),
530
# and in debug mode we don't want to. (Stdin is
531
# always replaced by /dev/null.)
532
self.checker = subprocess.Popen(command,
535
self.checker_callback_tag = (gobject.child_watch_add
537
self.checker_callback,
539
# The checker may have completed before the gobject
540
# watch was added. Check for this.
541
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
543
gobject.source_remove(self.checker_callback_tag)
544
self.checker_callback(pid, status, command)
545
except OSError as error:
546
logger.error("Failed to start subprocess: %s",
548
# Re-run this periodically if run by gobject.timeout_add
1151
551
def stop_checker(self):
1152
552
"""Force the checker process, if any, to stop."""
1153
553
if self.checker_callback_tag:
1154
GLib.source_remove(self.checker_callback_tag)
554
gobject.source_remove(self.checker_callback_tag)
1155
555
self.checker_callback_tag = None
1156
556
if getattr(self, "checker", None) is None:
1158
558
logger.debug("Stopping checker for %(name)s", vars(self))
1159
self.checker.terminate()
560
os.kill(self.checker.pid, signal.SIGTERM)
562
#if self.checker.poll() is None:
563
# os.kill(self.checker.pid, signal.SIGKILL)
564
except OSError as error:
565
if error.errno != errno.ESRCH: # No such process
1160
567
self.checker = None
1163
def dbus_service_property(dbus_interface,
570
def dbus_service_property(dbus_interface, signature="v",
571
access="readwrite", byte_arrays=False):
1167
572
"""Decorators for marking methods of a DBusObjectWithProperties to
1168
573
become properties on the D-Bus.
1170
575
The decorated method will be called with no arguments by "Get"
1171
576
and with one argument by "Set".
1173
578
The parameters, where they are supported, are the same as
1174
579
dbus.service.method, except there is only "signature", since the
1175
580
type from Get() and the type sent to Set() is the same.
1508
750
except (AttributeError, xml.dom.DOMException,
1509
751
xml.parsers.expat.ExpatError) as error:
1510
752
logger.error("Failed to override Introspection method",
1516
dbus.OBJECT_MANAGER_IFACE
1517
except AttributeError:
1518
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1521
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1522
"""A D-Bus object with an ObjectManager.
1524
Classes inheriting from this exposes the standard
1525
GetManagedObjects call and the InterfacesAdded and
1526
InterfacesRemoved signals on the standard
1527
"org.freedesktop.DBus.ObjectManager" interface.
1529
Note: No signals are sent automatically; they must be sent
1532
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1533
out_signature="a{oa{sa{sv}}}")
1534
def GetManagedObjects(self):
1535
"""This function must be overridden"""
1536
raise NotImplementedError()
1538
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1539
signature="oa{sa{sv}}")
1540
def InterfacesAdded(self, object_path, interfaces_and_properties):
1543
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1544
def InterfacesRemoved(self, object_path, interfaces):
1547
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1549
path_keyword='object_path',
1550
connection_keyword='connection')
1551
def Introspect(self, object_path, connection):
1552
"""Overloading of standard D-Bus method.
1554
Override return argument name of GetManagedObjects to be
1555
"objpath_interfaces_and_properties"
1557
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1561
document = xml.dom.minidom.parseString(xmlstring)
1563
for if_tag in document.getElementsByTagName("interface"):
1564
# Fix argument name for the GetManagedObjects method
1565
if (if_tag.getAttribute("name")
1566
== dbus.OBJECT_MANAGER_IFACE):
1567
for cn in if_tag.getElementsByTagName("method"):
1568
if (cn.getAttribute("name")
1569
== "GetManagedObjects"):
1570
for arg in cn.getElementsByTagName("arg"):
1571
if (arg.getAttribute("direction")
1575
"objpath_interfaces"
1577
xmlstring = document.toxml("utf-8")
1579
except (AttributeError, xml.dom.DOMException,
1580
xml.parsers.expat.ExpatError) as error:
1581
logger.error("Failed to override Introspection method",
1586
def datetime_to_dbus(dt, variant_level=0):
757
def datetime_to_dbus (dt, variant_level=0):
1587
758
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1589
return dbus.String("", variant_level=variant_level)
1590
return dbus.String(dt.isoformat(), variant_level=variant_level)
1593
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1594
"""A class decorator; applied to a subclass of
1595
dbus.service.Object, it will add alternate D-Bus attributes with
1596
interface names according to the "alt_interface_names" mapping.
1599
@alternate_dbus_interfaces({"org.example.Interface":
1600
"net.example.AlternateInterface"})
1601
class SampleDBusObject(dbus.service.Object):
1602
@dbus.service.method("org.example.Interface")
1603
def SampleDBusMethod():
1606
The above "SampleDBusMethod" on "SampleDBusObject" will be
1607
reachable via two interfaces: "org.example.Interface" and
1608
"net.example.AlternateInterface", the latter of which will have
1609
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1610
"true", unless "deprecate" is passed with a False value.
1612
This works for methods and signals, and also for D-Bus properties
1613
(from DBusObjectWithProperties) and interfaces (from the
1614
dbus_interface_annotations decorator).
760
return dbus.String("", variant_level = variant_level)
761
return dbus.String(dt.isoformat(),
762
variant_level=variant_level)
764
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
766
"""Applied to an empty subclass of a D-Bus object, this metaclass
767
will add additional D-Bus attributes matching a certain pattern.
1618
for orig_interface_name, alt_interface_name in (
1619
alt_interface_names.items()):
1621
interface_names = set()
1622
# Go though all attributes of the class
1623
for attrname, attribute in inspect.getmembers(cls):
769
def __new__(mcs, name, bases, attr):
770
# Go through all the base classes which could have D-Bus
771
# methods, signals, or properties in them
772
for base in (b for b in bases
773
if issubclass(b, dbus.service.Object)):
774
# Go though all attributes of the base class
775
for attrname, attribute in inspect.getmembers(base):
1624
776
# Ignore non-D-Bus attributes, and D-Bus attributes
1625
777
# with the wrong interface name
1626
778
if (not hasattr(attribute, "_dbus_interface")
1627
or not attribute._dbus_interface.startswith(
1628
orig_interface_name)):
779
or not attribute._dbus_interface
780
.startswith("se.recompile.Mandos")):
1630
782
# Create an alternate D-Bus interface name based on
1631
783
# the current name
1632
alt_interface = attribute._dbus_interface.replace(
1633
orig_interface_name, alt_interface_name)
1634
interface_names.add(alt_interface)
784
alt_interface = (attribute._dbus_interface
785
.replace("se.recompile.Mandos",
786
"se.bsnet.fukt.Mandos"))
1635
787
# Is this a D-Bus signal?
1636
788
if getattr(attribute, "_dbus_is_signal", False):
1637
# Extract the original non-method undecorated
1638
# function by black magic
1639
if sys.version_info.major == 2:
1640
nonmethod_func = (dict(
789
# Extract the original non-method function by
791
nonmethod_func = (dict(
1641
792
zip(attribute.func_code.co_freevars,
1642
attribute.__closure__))
1643
["func"].cell_contents)
1645
nonmethod_func = (dict(
1646
zip(attribute.__code__.co_freevars,
1647
attribute.__closure__))
1648
["func"].cell_contents)
793
attribute.__closure__))["func"]
1649
795
# Create a new, but exactly alike, function
1650
796
# object, and decorate it to be a new D-Bus signal
1651
797
# with the alternate D-Bus interface name
1652
new_function = copy_function(nonmethod_func)
1653
new_function = (dbus.service.signal(
1655
attribute._dbus_signature)(new_function))
1656
# Copy annotations, if any
1658
new_function._dbus_annotations = dict(
1659
attribute._dbus_annotations)
1660
except AttributeError:
798
new_function = (dbus.service.signal
800
attribute._dbus_signature)
802
nonmethod_func.func_code,
803
nonmethod_func.func_globals,
804
nonmethod_func.func_name,
805
nonmethod_func.func_defaults,
806
nonmethod_func.func_closure)))
1663
807
# Define a creator of a function to call both the
1664
# original and alternate functions, so both the
1665
# original and alternate signals gets sent when
1666
# the function is called
808
# old and new functions, so both the old and new
809
# signals gets sent when the function is called
1667
810
def fixscope(func1, func2):
1668
811
"""This function is a scope container to pass
1669
812
func1 and func2 to the "call_both" function
1670
813
outside of its arguments"""
1672
@functools.wraps(func2)
1673
814
def call_both(*args, **kwargs):
1674
815
"""This function will emit two D-Bus
1675
816
signals by calling func1 and func2"""
1676
817
func1(*args, **kwargs)
1677
818
func2(*args, **kwargs)
1678
# Make wrapper function look like a D-Bus
1680
for name, attr in inspect.getmembers(func2):
1681
if name.startswith("_dbus_"):
1682
setattr(call_both, name, attr)
1684
819
return call_both
1685
820
# Create the "call_both" function and add it to
1687
attr[attrname] = fixscope(attribute, new_function)
822
attr[attrname] = fixscope(attribute,
1688
824
# Is this a D-Bus method?
1689
825
elif getattr(attribute, "_dbus_is_method", False):
1690
826
# Create a new, but exactly alike, function
1691
827
# object. Decorate it to be a new D-Bus method
1692
828
# with the alternate D-Bus interface name. Add it
1695
dbus.service.method(
1697
attribute._dbus_in_signature,
1698
attribute._dbus_out_signature)
1699
(copy_function(attribute)))
1700
# Copy annotations, if any
1702
attr[attrname]._dbus_annotations = dict(
1703
attribute._dbus_annotations)
1704
except AttributeError:
830
attr[attrname] = (dbus.service.method
832
attribute._dbus_in_signature,
833
attribute._dbus_out_signature)
835
(attribute.func_code,
836
attribute.func_globals,
838
attribute.func_defaults,
839
attribute.func_closure)))
1706
840
# Is this a D-Bus property?
1707
841
elif getattr(attribute, "_dbus_is_property", False):
1708
842
# Create a new, but exactly alike, function
1709
843
# object, and decorate it to be a new D-Bus
1710
844
# property with the alternate D-Bus interface
1711
845
# name. Add it to the class.
1712
attr[attrname] = (dbus_service_property(
1713
alt_interface, attribute._dbus_signature,
1714
attribute._dbus_access,
1715
attribute._dbus_get_args_options
1717
(copy_function(attribute)))
1718
# Copy annotations, if any
1720
attr[attrname]._dbus_annotations = dict(
1721
attribute._dbus_annotations)
1722
except AttributeError:
1724
# Is this a D-Bus interface?
1725
elif getattr(attribute, "_dbus_is_interface", False):
1726
# Create a new, but exactly alike, function
1727
# object. Decorate it to be a new D-Bus interface
1728
# with the alternate D-Bus interface name. Add it
1731
dbus_interface_annotations(alt_interface)
1732
(copy_function(attribute)))
1734
# Deprecate all alternate interfaces
1735
iname = "_AlternateDBusNames_interface_annotation{}"
1736
for interface_name in interface_names:
1738
@dbus_interface_annotations(interface_name)
1740
return {"org.freedesktop.DBus.Deprecated":
1742
# Find an unused name
1743
for aname in (iname.format(i)
1744
for i in itertools.count()):
1745
if aname not in attr:
1749
# Replace the class with a new subclass of it with
1750
# methods, signals, etc. as created above.
1751
if sys.version_info.major == 2:
1752
cls = type(b"{}Alternate".format(cls.__name__),
1755
cls = type("{}Alternate".format(cls.__name__),
1762
@alternate_dbus_interfaces({"se.recompile.Mandos":
1763
"se.bsnet.fukt.Mandos"})
846
attr[attrname] = (dbus_service_property
848
attribute._dbus_signature,
849
attribute._dbus_access,
851
._dbus_get_args_options
854
(attribute.func_code,
855
attribute.func_globals,
857
attribute.func_defaults,
858
attribute.func_closure)))
859
return type.__new__(mcs, name, bases, attr)
1764
861
class ClientDBus(Client, DBusObjectWithProperties):
1765
862
"""A Client class using D-Bus
1768
865
dbus_object_path: dbus.ObjectPath
1769
866
bus: dbus.SystemBus()
1772
869
runtime_expansions = (Client.runtime_expansions
1773
+ ("dbus_object_path", ))
1775
_interface = "se.recompile.Mandos.Client"
870
+ ("dbus_object_path",))
1777
872
# dbus.service.Object doesn't use super(), so we can't either.
1779
def __init__(self, bus=None, *args, **kwargs):
874
def __init__(self, bus = None, *args, **kwargs):
875
self._approvals_pending = 0
1781
877
Client.__init__(self, *args, **kwargs)
1782
878
# Only now, when this client is initialized, can it show up on
1784
client_object_name = str(self.name).translate(
880
client_object_name = unicode(self.name).translate(
1785
881
{ord("."): ord("_"),
1786
882
ord("-"): ord("_")})
1787
self.dbus_object_path = dbus.ObjectPath(
1788
"/clients/" + client_object_name)
883
self.dbus_object_path = (dbus.ObjectPath
884
("/clients/" + client_object_name))
1789
885
DBusObjectWithProperties.__init__(self, self.bus,
1790
886
self.dbus_object_path)
1792
def notifychangeproperty(transform_func, dbus_name,
1793
type_func=lambda x: x,
1795
invalidate_only=False,
1796
_interface=_interface):
888
def notifychangeproperty(transform_func,
889
dbus_name, type_func=lambda x: x,
1797
891
""" Modify a variable so that it's a property which announces
1798
892
its changes to DBus.
1800
transform_fun: Function that takes a value and a variant_level
1801
and transforms it to a D-Bus type.
894
transform_fun: Function that takes a value and transforms it
1802
896
dbus_name: D-Bus name of the variable
1803
897
type_func: Function that transform the value before sending it
1804
898
to the D-Bus. Default: no transform
1805
899
variant_level: D-Bus variant level. Default: 1
1807
attrname = "_{}".format(dbus_name)
901
attrname = "_{0}".format(dbus_name)
1809
902
def setter(self, value):
1810
903
if hasattr(self, "dbus_object_path"):
1811
904
if (not hasattr(self, attrname) or
1812
905
type_func(getattr(self, attrname, None))
1813
906
!= type_func(value)):
1815
self.PropertiesChanged(
1816
_interface, dbus.Dictionary(),
1817
dbus.Array((dbus_name, )))
1819
dbus_value = transform_func(
1821
variant_level=variant_level)
1822
self.PropertyChanged(dbus.String(dbus_name),
1824
self.PropertiesChanged(
1826
dbus.Dictionary({dbus.String(dbus_name):
907
dbus_value = transform_func(type_func(value),
909
self.PropertyChanged(dbus.String(dbus_name),
1829
911
setattr(self, attrname, value)
1831
913
return property(lambda self: getattr(self, attrname), setter)
1833
916
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1834
917
approvals_pending = notifychangeproperty(dbus.Boolean,
1835
918
"ApprovalPending",
1837
920
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1838
921
last_enabled = notifychangeproperty(datetime_to_dbus,
1840
checker = notifychangeproperty(
1841
dbus.Boolean, "CheckerRunning",
1842
type_func=lambda checker: checker is not None)
923
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
924
type_func = lambda checker:
1843
926
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1844
927
"LastCheckedOK")
1845
last_checker_status = notifychangeproperty(dbus.Int16,
1846
"LastCheckerStatus")
1847
928
last_approval_request = notifychangeproperty(
1848
929
datetime_to_dbus, "LastApprovalRequest")
1849
930
approved_by_default = notifychangeproperty(dbus.Boolean,
1850
931
"ApprovedByDefault")
1851
approval_delay = notifychangeproperty(
1852
dbus.UInt64, "ApprovalDelay",
1853
type_func=lambda td: td.total_seconds() * 1000)
932
approval_delay = notifychangeproperty(dbus.UInt16,
935
_timedelta_to_milliseconds)
1854
936
approval_duration = notifychangeproperty(
1855
dbus.UInt64, "ApprovalDuration",
1856
type_func=lambda td: td.total_seconds() * 1000)
937
dbus.UInt16, "ApprovalDuration",
938
type_func = _timedelta_to_milliseconds)
1857
939
host = notifychangeproperty(dbus.String, "Host")
1858
timeout = notifychangeproperty(
1859
dbus.UInt64, "Timeout",
1860
type_func=lambda td: td.total_seconds() * 1000)
940
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
942
_timedelta_to_milliseconds)
1861
943
extended_timeout = notifychangeproperty(
1862
dbus.UInt64, "ExtendedTimeout",
1863
type_func=lambda td: td.total_seconds() * 1000)
1864
interval = notifychangeproperty(
1865
dbus.UInt64, "Interval",
1866
type_func=lambda td: td.total_seconds() * 1000)
944
dbus.UInt16, "ExtendedTimeout",
945
type_func = _timedelta_to_milliseconds)
946
interval = notifychangeproperty(dbus.UInt16,
949
_timedelta_to_milliseconds)
1867
950
checker_command = notifychangeproperty(dbus.String, "Checker")
1868
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1869
invalidate_only=True)
1871
952
del notifychangeproperty
1873
954
def __del__(self, *args, **kwargs):
1875
956
self.remove_from_connection()
2193
1244
self.start_checker()
2195
1246
self.stop_checker()
2197
1248
# ObjectPath - property
2199
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2200
"org.freedesktop.DBus.Deprecated": "true"})
2201
1249
@dbus_service_property(_interface, signature="o", access="read")
2202
1250
def ObjectPath_dbus_property(self):
2203
return self.dbus_object_path # is already a dbus.ObjectPath
1251
return self.dbus_object_path # is already a dbus.ObjectPath
2205
1253
# Secret = property
2207
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2209
@dbus_service_property(_interface,
1254
@dbus_service_property(_interface, signature="ay",
1255
access="write", byte_arrays=True)
2213
1256
def Secret_dbus_property(self, value):
2214
self.secret = bytes(value)
1257
self.secret = str(value)
2220
def __init__(self, child_pipe, key_id, fpr, address):
1262
class ProxyClient(object):
1263
def __init__(self, child_pipe, fpr, address):
2221
1264
self._pipe = child_pipe
2222
self._pipe.send(('init', key_id, fpr, address))
1265
self._pipe.send(('init', fpr, address))
2223
1266
if not self._pipe.recv():
2224
raise KeyError(key_id or fpr)
2226
1269
def __getattribute__(self, name):
1270
if(name == '_pipe'):
2228
1271
return super(ProxyClient, self).__getattribute__(name)
2229
1272
self._pipe.send(('getattr', name))
2230
1273
data = self._pipe.recv()
2231
1274
if data[0] == 'data':
2233
1276
if data[0] == 'function':
2235
1277
def func(*args, **kwargs):
2236
1278
self._pipe.send(('funcall', name, args, kwargs))
2237
1279
return self._pipe.recv()[1]
2241
1282
def __setattr__(self, name, value):
1283
if(name == '_pipe'):
2243
1284
return super(ProxyClient, self).__setattr__(name, value)
2244
1285
self._pipe.send(('setattr', name, value))
1287
class ClientDBusTransitional(ClientDBus):
1288
__metaclass__ = AlternateDBusNamesMetaclass
2247
1290
class ClientHandler(socketserver.BaseRequestHandler, object):
2248
1291
"""A class to handle client connections.
2250
1293
Instantiated once for each connection to handle it.
2251
1294
Note: This will run in its own forked process."""
2253
1296
def handle(self):
2254
1297
with contextlib.closing(self.server.child_pipe) as child_pipe:
2255
1298
logger.info("TCP connection from: %s",
2256
str(self.client_address))
1299
unicode(self.client_address))
2257
1300
logger.debug("Pipe FD: %d",
2258
1301
self.server.child_pipe.fileno())
2260
session = gnutls.ClientSession(self.request)
2262
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2263
# "+AES-256-CBC", "+SHA1",
2264
# "+COMP-NULL", "+CTYPE-OPENPGP",
1303
session = (gnutls.connection
1304
.ClientSession(self.request,
1306
.X509Credentials()))
1308
# Note: gnutls.connection.X509Credentials is really a
1309
# generic GnuTLS certificate credentials object so long as
1310
# no X.509 keys are added to it. Therefore, we can use it
1311
# here despite using OpenPGP certificates.
1313
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1314
# "+AES-256-CBC", "+SHA1",
1315
# "+COMP-NULL", "+CTYPE-OPENPGP",
2266
1317
# Use a fallback default, since this MUST be set.
2267
1318
priority = self.server.gnutls_priority
2268
1319
if priority is None:
2269
1320
priority = "NORMAL"
2270
gnutls.priority_set_direct(session._c_object,
2271
priority.encode("utf-8"),
1321
(gnutls.library.functions
1322
.gnutls_priority_set_direct(session._c_object,
2274
1325
# Start communication using the Mandos protocol
2275
1326
# Get protocol number
2276
1327
line = self.request.makefile().readline()
2277
1328
logger.debug("Protocol version: %r", line)
2279
1330
if int(line.strip().split()[0]) > 1:
2280
raise RuntimeError(line)
2281
1332
except (ValueError, IndexError, RuntimeError) as error:
2282
1333
logger.error("Unknown protocol version: %s", error)
2285
1336
# Start GnuTLS connection
2287
1338
session.handshake()
2288
except gnutls.Error as error:
1339
except gnutls.errors.GNUTLSError as error:
2289
1340
logger.warning("Handshake failed: %s", error)
2290
1341
# Do not run session.bye() here: the session is not
2291
1342
# established. Just abandon the request.
2293
1344
logger.debug("Handshake succeeded")
2295
1346
approval_required = False
2297
if gnutls.has_rawpk:
2300
key_id = self.key_id(
2301
self.peer_certificate(session))
2302
except (TypeError, gnutls.Error) as error:
2303
logger.warning("Bad certificate: %s", error)
2305
logger.debug("Key ID: %s", key_id)
2310
fpr = self.fingerprint(
2311
self.peer_certificate(session))
2312
except (TypeError, gnutls.Error) as error:
2313
logger.warning("Bad certificate: %s", error)
2315
logger.debug("Fingerprint: %s", fpr)
2318
client = ProxyClient(child_pipe, key_id, fpr,
1349
fpr = self.fingerprint(self.peer_certificate
1352
gnutls.errors.GNUTLSError) as error:
1353
logger.warning("Bad certificate: %s", error)
1355
logger.debug("Fingerprint: %s", fpr)
1358
client = ProxyClient(child_pipe, fpr,
2319
1359
self.client_address)
2320
1360
except KeyError:
2323
1363
if client.approval_delay:
2324
1364
delay = client.approval_delay
2325
1365
client.approvals_pending += 1
2326
1366
approval_required = True
2329
1369
if not client.enabled:
2330
1370
logger.info("Client %s is disabled",
2332
1372
if self.server.use_dbus:
2333
1373
# Emit D-Bus signal
2334
1374
client.Rejected("Disabled")
2337
if client.approved or not client.approval_delay:
2338
# We are approved or approval is disabled
1377
if client._approved or not client.approval_delay:
1378
#We are approved or approval is disabled
2340
elif client.approved is None:
1380
elif client._approved is None:
2341
1381
logger.info("Client %s needs approval",
2343
1383
if self.server.use_dbus:
2344
1384
# Emit D-Bus signal
2345
1385
client.NeedApproval(
2346
client.approval_delay.total_seconds()
2347
* 1000, client.approved_by_default)
1386
client.approval_delay_milliseconds(),
1387
client.approved_by_default)
2349
1389
logger.warning("Client %s was not approved",
2374
1416
delay -= time2 - time
2377
session.send(client.secret)
2378
except gnutls.Error as error:
2379
logger.warning("gnutls send failed",
1419
while sent_size < len(client.secret):
1421
sent = session.send(client.secret[sent_size:])
1422
except gnutls.errors.GNUTLSError as error:
1423
logger.warning("gnutls send failed")
1425
logger.debug("Sent: %d, remaining: %d",
1426
sent, len(client.secret)
1427
- (sent_size + sent))
2383
1430
logger.info("Sending secret to %s", client.name)
2384
1431
# bump the timeout using extended_timeout
2385
client.bump_timeout(client.extended_timeout)
1432
client.checked_ok(client.extended_timeout)
2386
1433
if self.server.use_dbus:
2387
1434
# Emit D-Bus signal
2388
1435
client.GotSecret()
2391
1438
if approval_required:
2392
1439
client.approvals_pending -= 1
2395
except gnutls.Error as error:
2396
logger.warning("GnuTLS bye failed",
1442
except gnutls.errors.GNUTLSError as error:
1443
logger.warning("GnuTLS bye failed")
2400
1446
def peer_certificate(session):
2401
"Return the peer's certificate as a bytestring"
2403
cert_type = gnutls.certificate_type_get2(session._c_object,
2405
except AttributeError:
2406
cert_type = gnutls.certificate_type_get(session._c_object)
2407
if gnutls.has_rawpk:
2408
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2410
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2411
# If not a valid certificate type...
2412
if cert_type not in valid_cert_types:
2413
logger.info("Cert type %r not in %r", cert_type,
2415
# ...return invalid data
1447
"Return the peer's OpenPGP certificate as a bytestring"
1448
# If not an OpenPGP certificate...
1449
if (gnutls.library.functions
1450
.gnutls_certificate_type_get(session._c_object)
1451
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1452
# ...do the normal thing
1453
return session.peer_certificate
2417
1454
list_size = ctypes.c_uint(1)
2418
cert_list = (gnutls.certificate_get_peers
1455
cert_list = (gnutls.library.functions
1456
.gnutls_certificate_get_peers
2419
1457
(session._c_object, ctypes.byref(list_size)))
2420
1458
if not bool(cert_list) and list_size.value != 0:
2421
raise gnutls.Error("error getting peer certificate")
1459
raise gnutls.errors.GNUTLSError("error getting peer"
2422
1461
if list_size.value == 0:
2424
1463
cert = cert_list[0]
2425
1464
return ctypes.string_at(cert.data, cert.size)
2428
def key_id(certificate):
2429
"Convert a certificate bytestring to a hexdigit key ID"
2430
# New GnuTLS "datum" with the public key
2431
datum = gnutls.datum_t(
2432
ctypes.cast(ctypes.c_char_p(certificate),
2433
ctypes.POINTER(ctypes.c_ubyte)),
2434
ctypes.c_uint(len(certificate)))
2435
# XXX all these need to be created in the gnutls "module"
2436
# New empty GnuTLS certificate
2437
pubkey = gnutls.pubkey_t()
2438
gnutls.pubkey_init(ctypes.byref(pubkey))
2439
# Import the raw public key into the certificate
2440
gnutls.pubkey_import(pubkey,
2441
ctypes.byref(datum),
2442
gnutls.X509_FMT_DER)
2443
# New buffer for the key ID
2444
buf = ctypes.create_string_buffer(32)
2445
buf_len = ctypes.c_size_t(len(buf))
2446
# Get the key ID from the raw public key into the buffer
2447
gnutls.pubkey_get_key_id(pubkey,
2448
gnutls.KEYID_USE_SHA256,
2449
ctypes.cast(ctypes.byref(buf),
2450
ctypes.POINTER(ctypes.c_ubyte)),
2451
ctypes.byref(buf_len))
2452
# Deinit the certificate
2453
gnutls.pubkey_deinit(pubkey)
2455
# Convert the buffer to a Python bytestring
2456
key_id = ctypes.string_at(buf, buf_len.value)
2457
# Convert the bytestring to hexadecimal notation
2458
hex_key_id = binascii.hexlify(key_id).upper()
2462
1467
def fingerprint(openpgp):
2463
1468
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2464
1469
# New GnuTLS "datum" with the OpenPGP public key
2465
datum = gnutls.datum_t(
2466
ctypes.cast(ctypes.c_char_p(openpgp),
2467
ctypes.POINTER(ctypes.c_ubyte)),
2468
ctypes.c_uint(len(openpgp)))
1470
datum = (gnutls.library.types
1471
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1474
ctypes.c_uint(len(openpgp))))
2469
1475
# New empty GnuTLS certificate
2470
crt = gnutls.openpgp_crt_t()
2471
gnutls.openpgp_crt_init(ctypes.byref(crt))
1476
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1477
(gnutls.library.functions
1478
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2472
1479
# Import the OpenPGP public key into the certificate
2473
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2474
gnutls.OPENPGP_FMT_RAW)
1480
(gnutls.library.functions
1481
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1482
gnutls.library.constants
1483
.GNUTLS_OPENPGP_FMT_RAW))
2475
1484
# Verify the self signature in the key
2476
1485
crtverify = ctypes.c_uint()
2477
gnutls.openpgp_crt_verify_self(crt, 0,
2478
ctypes.byref(crtverify))
1486
(gnutls.library.functions
1487
.gnutls_openpgp_crt_verify_self(crt, 0,
1488
ctypes.byref(crtverify)))
2479
1489
if crtverify.value != 0:
2480
gnutls.openpgp_crt_deinit(crt)
2481
raise gnutls.CertificateSecurityError(code
1490
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1491
raise (gnutls.errors.CertificateSecurityError
2483
1493
# New buffer for the fingerprint
2484
1494
buf = ctypes.create_string_buffer(20)
2485
1495
buf_len = ctypes.c_size_t()
2486
1496
# Get the fingerprint from the certificate into the buffer
2487
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2488
ctypes.byref(buf_len))
1497
(gnutls.library.functions
1498
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1499
ctypes.byref(buf_len)))
2489
1500
# Deinit the certificate
2490
gnutls.openpgp_crt_deinit(crt)
1501
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2491
1502
# Convert the buffer to a Python bytestring
2492
1503
fpr = ctypes.string_at(buf, buf_len.value)
2493
1504
# Convert the bytestring to hexadecimal notation
2494
hex_fpr = binascii.hexlify(fpr).upper()
1505
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2498
class MultiprocessingMixIn:
1509
class MultiprocessingMixIn(object):
2499
1510
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2501
1511
def sub_process_main(self, request, address):
2503
1513
self.finish_request(request, address)
2505
1515
self.handle_error(request, address)
2506
1516
self.close_request(request)
2508
1518
def process_request(self, request, address):
2509
1519
"""Start a new process to process the request."""
2510
proc = multiprocessing.Process(target=self.sub_process_main,
2511
args=(request, address))
1520
proc = multiprocessing.Process(target = self.sub_process_main,
2516
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
1527
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2517
1528
""" adds a pipe to the MixIn """
2519
1529
def process_request(self, request, client_address):
2520
1530
"""Overrides and wraps the original process_request().
2522
1532
This function creates a new pipe in self.pipe
2524
1534
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2526
1536
proc = MultiprocessingMixIn.process_request(self, request,
2527
1537
client_address)
2528
1538
self.child_pipe.close()
2529
1539
self.add_pipe(parent_pipe, proc)
2531
1541
def add_pipe(self, parent_pipe, proc):
2532
1542
"""Dummy function; override as necessary"""
2533
raise NotImplementedError()
1543
raise NotImplementedError
2536
1546
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2537
socketserver.TCPServer):
1547
socketserver.TCPServer, object):
2538
1548
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2541
1551
enabled: Boolean; whether this server is activated yet
2542
1552
interface: None or a network interface name (string)
2543
1553
use_ipv6: Boolean; to use IPv6 or not
2546
1555
def __init__(self, server_address, RequestHandlerClass,
2550
"""If socketfd is set, use that file descriptor instead of
2551
creating a new one with socket.socket().
1556
interface=None, use_ipv6=True):
2553
1557
self.interface = interface
2555
1559
self.address_family = socket.AF_INET6
2556
if socketfd is not None:
2557
# Save the file descriptor
2558
self.socketfd = socketfd
2559
# Save the original socket.socket() function
2560
self.socket_socket = socket.socket
2562
# To implement --socket, we monkey patch socket.socket.
2564
# (When socketserver.TCPServer is a new-style class, we
2565
# could make self.socket into a property instead of monkey
2566
# patching socket.socket.)
2568
# Create a one-time-only replacement for socket.socket()
2569
@functools.wraps(socket.socket)
2570
def socket_wrapper(*args, **kwargs):
2571
# Restore original function so subsequent calls are
2573
socket.socket = self.socket_socket
2574
del self.socket_socket
2575
# This time only, return a new socket object from the
2576
# saved file descriptor.
2577
return socket.fromfd(self.socketfd, *args, **kwargs)
2578
# Replace socket.socket() function with wrapper
2579
socket.socket = socket_wrapper
2580
# The socketserver.TCPServer.__init__ will call
2581
# socket.socket(), which might be our replacement,
2582
# socket_wrapper(), if socketfd was set.
2583
1560
socketserver.TCPServer.__init__(self, server_address,
2584
1561
RequestHandlerClass)
2586
1562
def server_bind(self):
2587
1563
"""This overrides the normal server_bind() function
2588
1564
to bind to an interface if one was specified, and also NOT to
2589
1565
bind to an address or port if they were not specified."""
2590
global SO_BINDTODEVICE
2591
1566
if self.interface is not None:
2592
1567
if SO_BINDTODEVICE is None:
2593
# Fall back to a hard-coded value which seems to be
2595
logger.warning("SO_BINDTODEVICE not found, trying 25")
2596
SO_BINDTODEVICE = 25
2598
self.socket.setsockopt(
2599
socket.SOL_SOCKET, SO_BINDTODEVICE,
2600
(self.interface + "\0").encode("utf-8"))
2601
except socket.error as error:
2602
if error.errno == errno.EPERM:
2603
logger.error("No permission to bind to"
2604
" interface %s", self.interface)
2605
elif error.errno == errno.ENOPROTOOPT:
2606
logger.error("SO_BINDTODEVICE not available;"
2607
" cannot bind to interface %s",
2609
elif error.errno == errno.ENODEV:
2610
logger.error("Interface %s does not exist,"
2611
" cannot bind", self.interface)
1568
logger.error("SO_BINDTODEVICE does not exist;"
1569
" cannot bind to interface %s",
1573
self.socket.setsockopt(socket.SOL_SOCKET,
1577
except socket.error as error:
1578
if error[0] == errno.EPERM:
1579
logger.error("No permission to"
1580
" bind to interface %s",
1582
elif error[0] == errno.ENOPROTOOPT:
1583
logger.error("SO_BINDTODEVICE not available;"
1584
" cannot bind to interface %s",
2614
1588
# Only bind(2) the socket if we really need to.
2615
1589
if self.server_address[0] or self.server_address[1]:
2616
if self.server_address[1]:
2617
self.allow_reuse_address = True
2618
1590
if not self.server_address[0]:
2619
1591
if self.address_family == socket.AF_INET6:
2620
any_address = "::" # in6addr_any
1592
any_address = "::" # in6addr_any
2622
any_address = "0.0.0.0" # INADDR_ANY
1594
any_address = socket.INADDR_ANY
2623
1595
self.server_address = (any_address,
2624
1596
self.server_address[1])
2625
1597
elif not self.server_address[1]:
2626
self.server_address = (self.server_address[0], 0)
1598
self.server_address = (self.server_address[0],
2627
1600
# if self.interface:
2628
1601
# self.server_address = (self.server_address[0],
2956
1847
parser.add_argument("--no-dbus", action="store_false",
2957
1848
dest="use_dbus", help="Do not provide D-Bus"
2958
" system bus interface", default=None)
1849
" system bus interface")
2959
1850
parser.add_argument("--no-ipv6", action="store_false",
2960
dest="use_ipv6", help="Do not use IPv6",
2962
parser.add_argument("--no-restore", action="store_false",
2963
dest="restore", help="Do not restore stored"
2964
" state", default=None)
2965
parser.add_argument("--socket", type=int,
2966
help="Specify a file descriptor to a network"
2967
" socket to use instead of creating one")
2968
parser.add_argument("--statedir", metavar="DIR",
2969
help="Directory to save/restore state in")
2970
parser.add_argument("--foreground", action="store_true",
2971
help="Run in foreground", default=None)
2972
parser.add_argument("--no-zeroconf", action="store_false",
2973
dest="zeroconf", help="Do not use Zeroconf",
1851
dest="use_ipv6", help="Do not use IPv6")
2976
1852
options = parser.parse_args()
2978
1854
if options.check:
2980
fail_count, test_count = doctest.testmod()
2981
sys.exit(os.EX_OK if fail_count == 0 else 1)
2983
1859
# Default values for config file for server-global settings
2984
if gnutls.has_rawpk:
2985
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2986
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2988
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2989
":+SIGN-DSA-SHA256")
2990
server_defaults = {"interface": "",
2994
"priority": priority,
2995
"servicename": "Mandos",
3001
"statedir": "/var/lib/mandos",
3002
"foreground": "False",
1860
server_defaults = { "interface": "",
1865
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1866
"servicename": "Mandos",
3007
1872
# Parse config file for server-global settings
3008
server_config = configparser.ConfigParser(server_defaults)
1873
server_config = configparser.SafeConfigParser(server_defaults)
3009
1874
del server_defaults
3010
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3011
# Convert the ConfigParser object to a dict
1875
server_config.read(os.path.join(options.configdir,
1877
# Convert the SafeConfigParser object to a dict
3012
1878
server_settings = server_config.defaults()
3013
1879
# Use the appropriate methods on the non-string config options
3014
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3015
"foreground", "zeroconf"):
1880
for option in ("debug", "use_dbus", "use_ipv6"):
3016
1881
server_settings[option] = server_config.getboolean("DEFAULT",
3018
1883
if server_settings["port"]:
3019
1884
server_settings["port"] = server_config.getint("DEFAULT",
3021
if server_settings["socket"]:
3022
server_settings["socket"] = server_config.getint("DEFAULT",
3024
# Later, stdin will, and stdout and stderr might, be dup'ed
3025
# over with an opened os.devnull. But we don't want this to
3026
# happen with a supplied network socket.
3027
if 0 <= server_settings["socket"] <= 2:
3028
server_settings["socket"] = os.dup(server_settings
3030
1886
del server_config
3032
1888
# Override the settings from the config file with command line
3033
1889
# options, if set.
3034
1890
for option in ("interface", "address", "port", "debug",
3035
"priority", "servicename", "configdir", "use_dbus",
3036
"use_ipv6", "debuglevel", "restore", "statedir",
3037
"socket", "foreground", "zeroconf"):
1891
"priority", "servicename", "configdir",
1892
"use_dbus", "use_ipv6", "debuglevel"):
3038
1893
value = getattr(options, option)
3039
1894
if value is not None:
3040
1895
server_settings[option] = value
3042
1897
# Force all strings to be unicode
3043
1898
for option in server_settings.keys():
3044
if isinstance(server_settings[option], bytes):
3045
server_settings[option] = (server_settings[option]
3047
# Force all boolean options to be boolean
3048
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3049
"foreground", "zeroconf"):
3050
server_settings[option] = bool(server_settings[option])
3051
# Debug implies foreground
3052
if server_settings["debug"]:
3053
server_settings["foreground"] = True
1899
if type(server_settings[option]) is str:
1900
server_settings[option] = unicode(server_settings[option])
3054
1901
# Now we have our good server settings in "server_settings"
3056
1903
##################################################################
3058
if (not server_settings["zeroconf"]
3059
and not (server_settings["port"]
3060
or server_settings["socket"] != "")):
3061
parser.error("Needs port or socket to work without Zeroconf")
3063
1905
# For convenience
3064
1906
debug = server_settings["debug"]
3065
1907
debuglevel = server_settings["debuglevel"]
3066
1908
use_dbus = server_settings["use_dbus"]
3067
1909
use_ipv6 = server_settings["use_ipv6"]
3068
stored_state_path = os.path.join(server_settings["statedir"],
3070
foreground = server_settings["foreground"]
3071
zeroconf = server_settings["zeroconf"]
3074
initlogger(debug, logging.DEBUG)
3079
level = getattr(logging, debuglevel.upper())
3080
initlogger(debug, level)
3082
1911
if server_settings["servicename"] != "Mandos":
3083
syslogger.setFormatter(
3084
logging.Formatter('Mandos ({}) [%(process)d]:'
3085
' %(levelname)s: %(message)s'.format(
3086
server_settings["servicename"])))
1912
syslogger.setFormatter(logging.Formatter
1913
('Mandos (%s) [%%(process)d]:'
1914
' %%(levelname)s: %%(message)s'
1915
% server_settings["servicename"]))
3088
1917
# Parse config file with clients
3089
client_config = configparser.ConfigParser(Client.client_defaults)
1918
client_defaults = { "timeout": "5m",
1919
"extended_timeout": "15m",
1921
"checker": "fping -q -- %%(host)s",
1923
"approval_delay": "0s",
1924
"approval_duration": "1s",
1926
client_config = configparser.SafeConfigParser(client_defaults)
3090
1927
client_config.read(os.path.join(server_settings["configdir"],
3091
1928
"clients.conf"))
3093
1930
global mandos_dbus_service
3094
1931
mandos_dbus_service = None
3097
if server_settings["socket"] != "":
3098
socketfd = server_settings["socket"]
3099
tcp_server = MandosServer(
3100
(server_settings["address"], server_settings["port"]),
3102
interface=(server_settings["interface"] or None),
3104
gnutls_priority=server_settings["priority"],
3108
pidfilename = "/run/mandos.pid"
3109
if not os.path.isdir("/run/."):
3110
pidfilename = "/var/run/mandos.pid"
3113
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3114
except IOError as e:
3115
logger.error("Could not open file %r", pidfilename,
3118
for name, group in (("_mandos", "_mandos"),
3119
("mandos", "mandos"),
3120
("nobody", "nogroup")):
3122
uid = pwd.getpwnam(name).pw_uid
3123
gid = pwd.getpwnam(group).pw_gid
1933
tcp_server = MandosServer((server_settings["address"],
1934
server_settings["port"]),
1936
interface=(server_settings["interface"]
1940
server_settings["priority"],
1943
pidfilename = "/var/run/mandos.pid"
1945
pidfile = open(pidfilename, "w")
1947
logger.error("Could not open file %r", pidfilename)
1950
uid = pwd.getpwnam("_mandos").pw_uid
1951
gid = pwd.getpwnam("_mandos").pw_gid
1954
uid = pwd.getpwnam("mandos").pw_uid
1955
gid = pwd.getpwnam("mandos").pw_gid
3125
1956
except KeyError:
1958
uid = pwd.getpwnam("nobody").pw_uid
1959
gid = pwd.getpwnam("nobody").pw_gid
3134
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3136
1966
except OSError as error:
3137
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3138
.format(uid, gid, os.strerror(error.errno)))
3139
if error.errno != errno.EPERM:
1967
if error[0] != errno.EPERM:
1970
if not debug and not debuglevel:
1971
syslogger.setLevel(logging.WARNING)
1972
console.setLevel(logging.WARNING)
1974
level = getattr(logging, debuglevel.upper())
1975
syslogger.setLevel(level)
1976
console.setLevel(level)
3143
1979
# Enable all possible GnuTLS debugging
3145
1981
# "Use a log level over 10 to enable all debugging options."
3146
1982
# - GnuTLS manual
3147
gnutls.global_set_log_level(11)
1983
gnutls.library.functions.gnutls_global_set_log_level(11)
1985
@gnutls.library.types.gnutls_log_func
3150
1986
def debug_gnutls(level, string):
3151
1987
logger.debug("GnuTLS: %s", string[:-1])
3153
gnutls.global_set_log_function(debug_gnutls)
1989
(gnutls.library.functions
1990
.gnutls_global_set_log_function(debug_gnutls))
3155
1992
# Redirect stdin so all checkers get /dev/null
3156
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1993
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3157
1994
os.dup2(null, sys.stdin.fileno())
1998
# No console logging
1999
logger.removeHandler(console)
3161
2001
# Need to fork before connecting to D-Bus
3163
2003
# Close all input and output, do double fork, etc.
3166
if gi.version_info < (3, 10, 2):
3167
# multiprocessing will use threads, so before we use GLib we
3168
# need to inform GLib that threads will be used.
3171
2006
global main_loop
3172
2007
# From the Avahi example code
3173
DBusGMainLoop(set_as_default=True)
3174
main_loop = GLib.MainLoop()
2008
DBusGMainLoop(set_as_default=True )
2009
main_loop = gobject.MainLoop()
3175
2010
bus = dbus.SystemBus()
3176
2011
# End of Avahi example code
3179
2014
bus_name = dbus.service.BusName("se.recompile.Mandos",
3182
old_bus_name = dbus.service.BusName(
3183
"se.bsnet.fukt.Mandos", bus,
3185
except dbus.exceptions.DBusException as e:
3186
logger.error("Disabling D-Bus:", exc_info=e)
2015
bus, do_not_queue=True)
2016
old_bus_name = (dbus.service.BusName
2017
("se.bsnet.fukt.Mandos", bus,
2019
except dbus.exceptions.NameExistsException as e:
2020
logger.error(unicode(e) + ", disabling D-Bus")
3187
2021
use_dbus = False
3188
2022
server_settings["use_dbus"] = False
3189
2023
tcp_server.use_dbus = False
3191
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3192
service = AvahiServiceToSyslog(
3193
name=server_settings["servicename"],
3194
servicetype="_mandos._tcp",
3197
if server_settings["interface"]:
3198
service.interface = if_nametoindex(
3199
server_settings["interface"].encode("utf-8"))
2024
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2025
service = AvahiService(name = server_settings["servicename"],
2026
servicetype = "_mandos._tcp",
2027
protocol = protocol, bus = bus)
2028
if server_settings["interface"]:
2029
service.interface = (if_nametoindex
2030
(str(server_settings["interface"])))
3201
2032
global multiprocessing_manager
3202
2033
multiprocessing_manager = multiprocessing.Manager()
3204
2035
client_class = Client
3206
client_class = functools.partial(ClientDBus, bus=bus)
3208
client_settings = Client.config_parser(client_config)
3209
old_client_settings = {}
3212
# This is used to redirect stdout and stderr for checker processes
3214
wnull = open(os.devnull, "w") # A writable /dev/null
3215
# Only used if server is running in foreground but not in debug
3217
if debug or not foreground:
3220
# Get client data and settings from last running state.
3221
if server_settings["restore"]:
3223
with open(stored_state_path, "rb") as stored_state:
3224
if sys.version_info.major == 2:
3225
clients_data, old_client_settings = pickle.load(
3228
bytes_clients_data, bytes_old_client_settings = (
3229
pickle.load(stored_state, encoding="bytes"))
3230
# Fix bytes to strings
3233
clients_data = {(key.decode("utf-8")
3234
if isinstance(key, bytes)
3237
bytes_clients_data.items()}
3238
del bytes_clients_data
3239
for key in clients_data:
3240
value = {(k.decode("utf-8")
3241
if isinstance(k, bytes) else k): v
3243
clients_data[key].items()}
3244
clients_data[key] = value
3246
value["client_structure"] = [
3248
if isinstance(s, bytes)
3250
value["client_structure"]]
3252
for k in ("name", "host"):
3253
if isinstance(value[k], bytes):
3254
value[k] = value[k].decode("utf-8")
3255
if "key_id" not in value:
3256
value["key_id"] = ""
3257
elif "fingerprint" not in value:
3258
value["fingerprint"] = ""
3259
# old_client_settings
3261
old_client_settings = {
3262
(key.decode("utf-8")
3263
if isinstance(key, bytes)
3266
bytes_old_client_settings.items()}
3267
del bytes_old_client_settings
3269
for value in old_client_settings.values():
3270
if isinstance(value["host"], bytes):
3271
value["host"] = (value["host"]
3273
os.remove(stored_state_path)
3274
except IOError as e:
3275
if e.errno == errno.ENOENT:
3276
logger.warning("Could not load persistent state:"
3277
" {}".format(os.strerror(e.errno)))
3279
logger.critical("Could not load persistent state:",
3282
except EOFError as e:
3283
logger.warning("Could not load persistent state: "
3287
with PGPEngine() as pgp:
3288
for client_name, client in clients_data.items():
3289
# Skip removed clients
3290
if client_name not in client_settings:
3293
# Decide which value to use after restoring saved state.
3294
# We have three different values: Old config file,
3295
# new config file, and saved state.
3296
# New config value takes precedence if it differs from old
3297
# config value, otherwise use saved state.
3298
for name, value in client_settings[client_name].items():
3300
# For each value in new config, check if it
3301
# differs from the old config value (Except for
3302
# the "secret" attribute)
3303
if (name != "secret"
3305
old_client_settings[client_name][name])):
3306
client[name] = value
3310
# Clients who has passed its expire date can still be
3311
# enabled if its last checker was successful. A Client
3312
# whose checker succeeded before we stored its state is
3313
# assumed to have successfully run all checkers during
3315
if client["enabled"]:
3316
if datetime.datetime.utcnow() >= client["expires"]:
3317
if not client["last_checked_ok"]:
3319
"disabling client {} - Client never "
3320
"performed a successful checker".format(
3322
client["enabled"] = False
3323
elif client["last_checker_status"] != 0:
3325
"disabling client {} - Client last"
3326
" checker failed with error code"
3329
client["last_checker_status"]))
3330
client["enabled"] = False
3332
client["expires"] = (
3333
datetime.datetime.utcnow()
3334
+ client["timeout"])
3335
logger.debug("Last checker succeeded,"
3336
" keeping {} enabled".format(
2037
client_class = functools.partial(ClientDBusTransitional,
2039
def client_config_items(config, section):
2040
special_settings = {
2041
"approved_by_default":
2042
lambda: config.getboolean(section,
2043
"approved_by_default"),
2045
for name, value in config.items(section):
3339
client["secret"] = pgp.decrypt(
3340
client["encrypted_secret"],
3341
client_settings[client_name]["secret"])
3343
# If decryption fails, we use secret from new settings
3344
logger.debug("Failed to decrypt {} old secret".format(
3346
client["secret"] = (client_settings[client_name]
3349
# Add/remove clients based on new changes made to config
3350
for client_name in (set(old_client_settings)
3351
- set(client_settings)):
3352
del clients_data[client_name]
3353
for client_name in (set(client_settings)
3354
- set(old_client_settings)):
3355
clients_data[client_name] = client_settings[client_name]
3357
# Create all client objects
3358
for client_name, client in clients_data.items():
3359
tcp_server.clients[client_name] = client_class(
3362
server_settings=server_settings)
2047
yield (name, special_settings[name]())
2051
tcp_server.clients.update(set(
2052
client_class(name = section,
2053
config= dict(client_config_items(
2054
client_config, section)))
2055
for section in client_config.sections()))
3364
2056
if not tcp_server.clients:
3365
2057
logger.warning("No clients defined")
3368
if pidfile is not None:
3372
print(pid, file=pidfile)
3374
logger.error("Could not write to file %r with PID %d",
2063
pidfile.write(str(pid) + "\n".encode("utf-8"))
2066
logger.error("Could not write to file %r with PID %d",
2069
# "pidfile" was never created
3377
2071
del pidfilename
3379
for termsig in (signal.SIGHUP, signal.SIGTERM):
3380
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3381
lambda: main_loop.quit() and False)
2073
signal.signal(signal.SIGINT, signal.SIG_IGN)
2075
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2076
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3385
@alternate_dbus_interfaces(
3386
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3387
class MandosDBusService(DBusObjectWithObjectManager):
2079
class MandosDBusService(dbus.service.Object):
3388
2080
"""A D-Bus proxy object"""
3390
2081
def __init__(self):
3391
2082
dbus.service.Object.__init__(self, bus, "/")
3393
2083
_interface = "se.recompile.Mandos"
3395
2085
@dbus.service.signal(_interface, signature="o")
3396
2086
def ClientAdded(self, objpath):
3400
2090
@dbus.service.signal(_interface, signature="ss")
3401
def ClientNotFound(self, key_id, address):
2091
def ClientNotFound(self, fingerprint, address):
3405
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3407
2095
@dbus.service.signal(_interface, signature="os")
3408
2096
def ClientRemoved(self, objpath, name):
3412
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3414
2100
@dbus.service.method(_interface, out_signature="ao")
3415
2101
def GetAllClients(self):
3417
return dbus.Array(c.dbus_object_path for c in
3418
tcp_server.clients.values())
3420
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2103
return dbus.Array(c.dbus_object_path
2104
for c in tcp_server.clients)
3422
2106
@dbus.service.method(_interface,
3423
2107
out_signature="a{oa{sv}}")
3424
2108
def GetAllClientsWithProperties(self):
3426
2110
return dbus.Dictionary(
3427
{c.dbus_object_path: c.GetAll(
3428
"se.recompile.Mandos.Client")
3429
for c in tcp_server.clients.values()},
2111
((c.dbus_object_path, c.GetAll(""))
2112
for c in tcp_server.clients),
3430
2113
signature="oa{sv}")
3432
2115
@dbus.service.method(_interface, in_signature="o")
3433
2116
def RemoveClient(self, object_path):
3435
for c in tcp_server.clients.values():
2118
for c in tcp_server.clients:
3436
2119
if c.dbus_object_path == object_path:
3437
del tcp_server.clients[c.name]
2120
tcp_server.clients.remove(c)
3438
2121
c.remove_from_connection()
3439
# Don't signal the disabling
2122
# Don't signal anything except ClientRemoved
3440
2123
c.disable(quiet=True)
3441
# Emit D-Bus signal for removal
3442
self.client_removed_signal(c)
2125
self.ClientRemoved(object_path, c.name)
3444
2127
raise KeyError(object_path)
3448
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3449
out_signature="a{oa{sa{sv}}}")
3450
def GetManagedObjects(self):
3452
return dbus.Dictionary(
3453
{client.dbus_object_path:
3455
{interface: client.GetAll(interface)
3457
client._get_all_interface_names()})
3458
for client in tcp_server.clients.values()})
3460
def client_added_signal(self, client):
3461
"""Send the new standard signal and the old signal"""
3463
# New standard signal
3464
self.InterfacesAdded(
3465
client.dbus_object_path,
3467
{interface: client.GetAll(interface)
3469
client._get_all_interface_names()}))
3471
self.ClientAdded(client.dbus_object_path)
3473
def client_removed_signal(self, client):
3474
"""Send the new standard signal and the old signal"""
3476
# New standard signal
3477
self.InterfacesRemoved(
3478
client.dbus_object_path,
3479
client._get_all_interface_names())
3481
self.ClientRemoved(client.dbus_object_path,
3484
mandos_dbus_service = MandosDBusService()
3486
# Save modules to variables to exempt the modules from being
3487
# unloaded before the function registered with atexit() is run.
3488
mp = multiprocessing
2131
class MandosDBusServiceTransitional(MandosDBusService):
2132
__metaclass__ = AlternateDBusNamesMetaclass
2133
mandos_dbus_service = MandosDBusServiceTransitional()
3492
2136
"Cleanup function; run on exit"
3496
mp.active_children()
3498
if not (tcp_server.clients or client_settings):
3501
# Store client before exiting. Secrets are encrypted with key
3502
# based on what config file has. If config file is
3503
# removed/edited, old secret will thus be unrecovable.
3505
with PGPEngine() as pgp:
3506
for client in tcp_server.clients.values():
3507
key = client_settings[client.name]["secret"]
3508
client.encrypted_secret = pgp.encrypt(client.secret,
3512
# A list of attributes that can not be pickled
3514
exclude = {"bus", "changedstate", "secret",
3515
"checker", "server_settings"}
3516
for name, typ in inspect.getmembers(dbus.service
3520
client_dict["encrypted_secret"] = (client
3522
for attr in client.client_structure:
3523
if attr not in exclude:
3524
client_dict[attr] = getattr(client, attr)
3526
clients[client.name] = client_dict
3527
del client_settings[client.name]["secret"]
3530
with tempfile.NamedTemporaryFile(
3534
dir=os.path.dirname(stored_state_path),
3535
delete=False) as stored_state:
3536
pickle.dump((clients, client_settings), stored_state,
3538
tempname = stored_state.name
3539
os.rename(tempname, stored_state_path)
3540
except (IOError, OSError) as e:
3546
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3547
logger.warning("Could not save persistent state: {}"
3548
.format(os.strerror(e.errno)))
3550
logger.warning("Could not save persistent state:",
3554
# Delete all clients, and settings from config
2139
multiprocessing.active_children()
3555
2140
while tcp_server.clients:
3556
name, client = tcp_server.clients.popitem()
2141
client = tcp_server.clients.pop()
3558
2143
client.remove_from_connection()
3559
# Don't signal the disabling
2144
client.disable_hook = None
2145
# Don't signal anything except ClientRemoved
3560
2146
client.disable(quiet=True)
3561
# Emit D-Bus signal for removal
3563
mandos_dbus_service.client_removed_signal(client)
3564
client_settings.clear()
2149
mandos_dbus_service.ClientRemoved(client
3566
2153
atexit.register(cleanup)
3568
for client in tcp_server.clients.values():
2155
for client in tcp_server.clients:
3570
# Emit D-Bus signal for adding
3571
mandos_dbus_service.client_added_signal(client)
3572
# Need to initiate checking of clients
3574
client.init_checker()
2158
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3576
2161
tcp_server.enable()
3577
2162
tcp_server.server_activate()
3579
2164
# Find out what port we got
3581
service.port = tcp_server.socket.getsockname()[1]
2165
service.port = tcp_server.socket.getsockname()[1]
3583
2167
logger.info("Now listening on address %r, port %d,"
3584
" flowinfo %d, scope_id %d",
3585
*tcp_server.socket.getsockname())
2168
" flowinfo %d, scope_id %d"
2169
% tcp_server.socket.getsockname())
3587
logger.info("Now listening on address %r, port %d",
3588
*tcp_server.socket.getsockname())
3590
# service.interface = tcp_server.socket.getsockname()[3]
2171
logger.info("Now listening on address %r, port %d"
2172
% tcp_server.socket.getsockname())
2174
#service.interface = tcp_server.socket.getsockname()[3]
3594
# From the Avahi example code
3597
except dbus.exceptions.DBusException as error:
3598
logger.critical("D-Bus Exception", exc_info=error)
3601
# End of Avahi example code
3603
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3604
lambda *args, **kwargs:
3605
(tcp_server.handle_request
3606
(*args[2:], **kwargs) or True))
2177
# From the Avahi example code
2180
except dbus.exceptions.DBusException as error:
2181
logger.critical("DBusException: %s", error)
2184
# End of Avahi example code
2186
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2187
lambda *args, **kwargs:
2188
(tcp_server.handle_request
2189
(*args[2:], **kwargs) or True))
3608
2191
logger.debug("Starting main loop")
3609
2192
main_loop.run()
3610
2193
except AvahiError as error:
3611
logger.critical("Avahi Error", exc_info=error)
2194
logger.critical("AvahiError: %s", error)
3614
2197
except KeyboardInterrupt: