63
import cPickle as pickle
70
import cPickle as pickle
64
73
import multiprocessing
68
82
import dbus.service
83
from gi.repository import GLib
71
84
from dbus.mainloop.glib import DBusGMainLoop
74
87
import xml.dom.minidom
90
# Try to find the value of SO_BINDTODEVICE:
92
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
93
# newer, and it is also the most natural place for it:
78
94
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
79
95
except AttributeError:
97
# This is where SO_BINDTODEVICE was up to and including Python
81
99
from IN import SO_BINDTODEVICE
82
100
except ImportError:
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)
101
# In Python 2.7 it seems to have been removed entirely.
102
# Try running the C preprocessor:
104
cc = subprocess.Popen(["cc", "--language=c", "-E",
106
stdin=subprocess.PIPE,
107
stdout=subprocess.PIPE)
108
stdout = cc.communicate(
109
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
110
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
111
except (OSError, ValueError, IndexError):
113
SO_BINDTODEVICE = None
115
if sys.version_info.major == 2:
119
stored_state_file = "clients.pickle"
121
logger = logging.getLogger()
125
if_nametoindex = ctypes.cdll.LoadLibrary(
126
ctypes.util.find_library("c")).if_nametoindex
127
except (OSError, AttributeError):
129
def if_nametoindex(interface):
130
"Get an interface index the hard way, i.e. using fcntl()"
131
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
132
with contextlib.closing(socket.socket()) as s:
133
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
134
struct.pack(b"16s16x", interface))
135
interface_index = struct.unpack("I", ifreq[16:20])[0]
136
return interface_index
139
def copy_function(func):
140
"""Make a copy of a function"""
141
if sys.version_info.major == 2:
142
return types.FunctionType(func.func_code,
148
return types.FunctionType(func.__code__,
155
def initlogger(debug, level=logging.WARNING):
156
"""init logger and add loglevel"""
159
syslogger = (logging.handlers.SysLogHandler(
160
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
162
syslogger.setFormatter(logging.Formatter
163
('Mandos [%(process)d]: %(levelname)s:'
165
logger.addHandler(syslogger)
168
console = logging.StreamHandler()
169
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
173
logger.addHandler(console)
174
logger.setLevel(level)
177
class PGPError(Exception):
178
"""Exception if encryption/decryption fails"""
182
class PGPEngine(object):
183
"""A simple class for OpenPGP symmetric encryption & decryption"""
186
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
189
output = subprocess.check_output(["gpgconf"])
190
for line in output.splitlines():
191
name, text, path = line.split(b":")
196
if e.errno != errno.ENOENT:
198
self.gnupgargs = ['--batch',
199
'--homedir', self.tempdir,
202
# Only GPG version 1 has the --no-use-agent option.
203
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
204
self.gnupgargs.append("--no-use-agent")
209
def __exit__(self, exc_type, exc_value, traceback):
217
if self.tempdir is not None:
218
# Delete contents of tempdir
219
for root, dirs, files in os.walk(self.tempdir,
221
for filename in files:
222
os.remove(os.path.join(root, filename))
224
os.rmdir(os.path.join(root, dirname))
226
os.rmdir(self.tempdir)
229
def password_encode(self, password):
230
# Passphrase can not be empty and can not contain newlines or
231
# NUL bytes. So we prefix it and hex encode it.
232
encoded = b"mandos" + binascii.hexlify(password)
233
if len(encoded) > 2048:
234
# GnuPG can't handle long passwords, so encode differently
235
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
236
.replace(b"\n", b"\\n")
237
.replace(b"\0", b"\\x00"))
240
def encrypt(self, data, password):
241
passphrase = self.password_encode(password)
242
with tempfile.NamedTemporaryFile(
243
dir=self.tempdir) as passfile:
244
passfile.write(passphrase)
246
proc = subprocess.Popen([self.gpg, '--symmetric',
250
stdin=subprocess.PIPE,
251
stdout=subprocess.PIPE,
252
stderr=subprocess.PIPE)
253
ciphertext, err = proc.communicate(input=data)
254
if proc.returncode != 0:
258
def decrypt(self, data, password):
259
passphrase = self.password_encode(password)
260
with tempfile.NamedTemporaryFile(
261
dir=self.tempdir) as passfile:
262
passfile.write(passphrase)
264
proc = subprocess.Popen([self.gpg, '--decrypt',
268
stdin=subprocess.PIPE,
269
stdout=subprocess.PIPE,
270
stderr=subprocess.PIPE)
271
decrypted_plaintext, err = proc.communicate(input=data)
272
if proc.returncode != 0:
274
return decrypted_plaintext
277
# Pretend that we have an Avahi module
279
"""This isn't so much a class as it is a module-like namespace.
280
It is instantiated once, and simulates having an Avahi module."""
281
IF_UNSPEC = -1 # avahi-common/address.h
282
PROTO_UNSPEC = -1 # avahi-common/address.h
283
PROTO_INET = 0 # avahi-common/address.h
284
PROTO_INET6 = 1 # avahi-common/address.h
285
DBUS_NAME = "org.freedesktop.Avahi"
286
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
287
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
288
DBUS_PATH_SERVER = "/"
290
def string_array_to_txt_array(self, t):
291
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
292
for s in t), signature="ay")
293
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
294
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
295
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
296
SERVER_INVALID = 0 # avahi-common/defs.h
297
SERVER_REGISTERING = 1 # avahi-common/defs.h
298
SERVER_RUNNING = 2 # avahi-common/defs.h
299
SERVER_COLLISION = 3 # avahi-common/defs.h
300
SERVER_FAILURE = 4 # avahi-common/defs.h
104
304
class AvahiError(Exception):
105
305
def __init__(self, value, *args, **kwargs):
106
306
self.value = value
107
super(AvahiError, self).__init__(value, *args, **kwargs)
108
def __unicode__(self):
109
return unicode(repr(self.value))
307
return super(AvahiError, self).__init__(value, *args,
111
311
class AvahiServiceError(AvahiError):
114
315
class AvahiGroupError(AvahiError):
118
319
class AvahiService(object):
119
320
"""An Avahi (Zeroconf) service.
122
323
interface: integer; avahi.IF_UNSPEC or an interface index.
123
324
Used to optionally bind to the specified interface.
124
325
name: string; Example: 'Mandos'
125
326
type: string; Example: '_mandos._tcp'.
126
See <http://www.dns-sd.org/ServiceTypes.html>
327
See <https://www.iana.org/assignments/service-names-port-numbers>
127
328
port: integer; what port to announce
128
329
TXT: list of strings; TXT record for the service
129
330
domain: string; Domain to publish on, default to .local if empty.
262
489
follow_name_owner_changes=True),
263
490
avahi.DBUS_INTERFACE_SERVER)
264
491
self.server.connect_to_signal("StateChanged",
265
self.server_state_changed)
492
self.server_state_changed)
266
493
self.server_state_changed(self.server.GetState())
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))
496
class AvahiServiceToSyslog(AvahiService):
497
def rename(self, *args, **kwargs):
498
"""Add the new name to the syslog messages"""
499
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
500
syslogger.setFormatter(logging.Formatter(
501
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
506
# Pretend that we have a GnuTLS module
507
class GnuTLS(object):
508
"""This isn't so much a class as it is a module-like namespace.
509
It is instantiated once, and simulates having a GnuTLS module."""
511
library = ctypes.util.find_library("gnutls")
513
library = ctypes.util.find_library("gnutls-deb0")
514
_library = ctypes.cdll.LoadLibrary(library)
516
_need_version = b"3.3.0"
517
_tls_rawpk_version = b"3.6.6"
520
# Need to use "self" here, since this method is called before
521
# the assignment to the "gnutls" global variable happens.
522
if self.check_version(self._need_version) is None:
523
raise self.Error("Needs GnuTLS {} or later"
524
.format(self._need_version))
526
# Unless otherwise indicated, the constants and types below are
527
# all from the gnutls/gnutls.h C header file.
538
E_NO_CERTIFICATE_FOUND = -49
543
KEYID_USE_SHA256 = 1 # gnutls/x509.h
544
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
547
class session_int(ctypes.Structure):
549
session_t = ctypes.POINTER(session_int)
551
class certificate_credentials_st(ctypes.Structure):
553
certificate_credentials_t = ctypes.POINTER(
554
certificate_credentials_st)
555
certificate_type_t = ctypes.c_int
557
class datum_t(ctypes.Structure):
558
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
559
('size', ctypes.c_uint)]
561
class openpgp_crt_int(ctypes.Structure):
563
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
564
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
565
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
566
credentials_type_t = ctypes.c_int
567
transport_ptr_t = ctypes.c_void_p
568
close_request_t = ctypes.c_int
571
class Error(Exception):
572
# We need to use the class name "GnuTLS" here, since this
573
# exception might be raised from within GnuTLS.__init__,
574
# which is called before the assignment to the "gnutls"
575
# global variable has happened.
576
def __init__(self, message=None, code=None, args=()):
577
# Default usage is by a message string, but if a return
578
# code is passed, convert it to a string with
581
if message is None and code is not None:
582
message = GnuTLS.strerror(code)
583
return super(GnuTLS.Error, self).__init__(
586
class CertificateSecurityError(Error):
590
class Credentials(object):
592
self._c_object = gnutls.certificate_credentials_t()
593
gnutls.certificate_allocate_credentials(
594
ctypes.byref(self._c_object))
595
self.type = gnutls.CRD_CERTIFICATE
598
gnutls.certificate_free_credentials(self._c_object)
600
class ClientSession(object):
601
def __init__(self, socket, credentials=None):
602
self._c_object = gnutls.session_t()
603
gnutls_flags = gnutls.CLIENT
604
if gnutls.check_version("3.5.6"):
605
gnutls_flags |= gnutls.NO_TICKETS
607
gnutls_flags |= gnutls.ENABLE_RAWPK
608
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
610
gnutls.set_default_priority(self._c_object)
611
gnutls.transport_set_ptr(self._c_object, socket.fileno())
612
gnutls.handshake_set_private_extensions(self._c_object,
615
if credentials is None:
616
credentials = gnutls.Credentials()
617
gnutls.credentials_set(self._c_object, credentials.type,
618
ctypes.cast(credentials._c_object,
620
self.credentials = credentials
623
gnutls.deinit(self._c_object)
626
return gnutls.handshake(self._c_object)
628
def send(self, data):
632
data_len -= gnutls.record_send(self._c_object,
637
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
639
# Error handling functions
640
def _error_code(result):
641
"""A function to raise exceptions on errors, suitable
642
for the 'restype' attribute on ctypes functions"""
645
if result == gnutls.E_NO_CERTIFICATE_FOUND:
646
raise gnutls.CertificateSecurityError(code=result)
647
raise gnutls.Error(code=result)
649
def _retry_on_error(result, func, arguments):
650
"""A function to retry on some errors, suitable
651
for the 'errcheck' attribute on ctypes functions"""
653
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
654
return _error_code(result)
655
result = func(*arguments)
658
# Unless otherwise indicated, the function declarations below are
659
# all from the gnutls/gnutls.h C header file.
662
priority_set_direct = _library.gnutls_priority_set_direct
663
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
664
ctypes.POINTER(ctypes.c_char_p)]
665
priority_set_direct.restype = _error_code
667
init = _library.gnutls_init
668
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
669
init.restype = _error_code
671
set_default_priority = _library.gnutls_set_default_priority
672
set_default_priority.argtypes = [session_t]
673
set_default_priority.restype = _error_code
675
record_send = _library.gnutls_record_send
676
record_send.argtypes = [session_t, ctypes.c_void_p,
678
record_send.restype = ctypes.c_ssize_t
679
record_send.errcheck = _retry_on_error
681
certificate_allocate_credentials = (
682
_library.gnutls_certificate_allocate_credentials)
683
certificate_allocate_credentials.argtypes = [
684
ctypes.POINTER(certificate_credentials_t)]
685
certificate_allocate_credentials.restype = _error_code
687
certificate_free_credentials = (
688
_library.gnutls_certificate_free_credentials)
689
certificate_free_credentials.argtypes = [
690
certificate_credentials_t]
691
certificate_free_credentials.restype = None
693
handshake_set_private_extensions = (
694
_library.gnutls_handshake_set_private_extensions)
695
handshake_set_private_extensions.argtypes = [session_t,
697
handshake_set_private_extensions.restype = None
699
credentials_set = _library.gnutls_credentials_set
700
credentials_set.argtypes = [session_t, credentials_type_t,
702
credentials_set.restype = _error_code
704
strerror = _library.gnutls_strerror
705
strerror.argtypes = [ctypes.c_int]
706
strerror.restype = ctypes.c_char_p
708
certificate_type_get = _library.gnutls_certificate_type_get
709
certificate_type_get.argtypes = [session_t]
710
certificate_type_get.restype = _error_code
712
certificate_get_peers = _library.gnutls_certificate_get_peers
713
certificate_get_peers.argtypes = [session_t,
714
ctypes.POINTER(ctypes.c_uint)]
715
certificate_get_peers.restype = ctypes.POINTER(datum_t)
717
global_set_log_level = _library.gnutls_global_set_log_level
718
global_set_log_level.argtypes = [ctypes.c_int]
719
global_set_log_level.restype = None
721
global_set_log_function = _library.gnutls_global_set_log_function
722
global_set_log_function.argtypes = [log_func]
723
global_set_log_function.restype = None
725
deinit = _library.gnutls_deinit
726
deinit.argtypes = [session_t]
727
deinit.restype = None
729
handshake = _library.gnutls_handshake
730
handshake.argtypes = [session_t]
731
handshake.restype = _error_code
732
handshake.errcheck = _retry_on_error
734
transport_set_ptr = _library.gnutls_transport_set_ptr
735
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
736
transport_set_ptr.restype = None
738
bye = _library.gnutls_bye
739
bye.argtypes = [session_t, close_request_t]
740
bye.restype = _error_code
741
bye.errcheck = _retry_on_error
743
check_version = _library.gnutls_check_version
744
check_version.argtypes = [ctypes.c_char_p]
745
check_version.restype = ctypes.c_char_p
747
has_rawpk = bool(check_version(_tls_rawpk_version))
751
class pubkey_st(ctypes.Structure):
753
pubkey_t = ctypes.POINTER(pubkey_st)
755
x509_crt_fmt_t = ctypes.c_int
757
# All the function declarations below are from gnutls/abstract.h
758
pubkey_init = _library.gnutls_pubkey_init
759
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
760
pubkey_init.restype = _error_code
762
pubkey_import = _library.gnutls_pubkey_import
763
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
765
pubkey_import.restype = _error_code
767
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
768
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
769
ctypes.POINTER(ctypes.c_ubyte),
770
ctypes.POINTER(ctypes.c_size_t)]
771
pubkey_get_key_id.restype = _error_code
773
pubkey_deinit = _library.gnutls_pubkey_deinit
774
pubkey_deinit.argtypes = [pubkey_t]
775
pubkey_deinit.restype = None
777
# All the function declarations below are from gnutls/openpgp.h
779
openpgp_crt_init = _library.gnutls_openpgp_crt_init
780
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
781
openpgp_crt_init.restype = _error_code
783
openpgp_crt_import = _library.gnutls_openpgp_crt_import
784
openpgp_crt_import.argtypes = [openpgp_crt_t,
785
ctypes.POINTER(datum_t),
787
openpgp_crt_import.restype = _error_code
789
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
790
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
791
ctypes.POINTER(ctypes.c_uint)]
792
openpgp_crt_verify_self.restype = _error_code
794
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
795
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
796
openpgp_crt_deinit.restype = None
798
openpgp_crt_get_fingerprint = (
799
_library.gnutls_openpgp_crt_get_fingerprint)
800
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
804
openpgp_crt_get_fingerprint.restype = _error_code
806
if check_version("3.6.4"):
807
certificate_type_get2 = _library.gnutls_certificate_type_get2
808
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
809
certificate_type_get2.restype = _error_code
811
# Remove non-public functions
812
del _error_code, _retry_on_error
813
# Create the global "gnutls" object, simulating a module
817
def call_pipe(connection, # : multiprocessing.Connection
818
func, *args, **kwargs):
819
"""This function is meant to be called by multiprocessing.Process
821
This function runs func(*args, **kwargs), and writes the resulting
822
return value on the provided multiprocessing.Connection.
824
connection.send(func(*args, **kwargs))
275
828
class Client(object):
276
829
"""A representation of a client host served by this server.
279
_approved: bool(); 'None' if not yet approved/disapproved
832
approved: bool(); 'None' if not yet approved/disapproved
280
833
approval_delay: datetime.timedelta(); Time to wait for approval
281
834
approval_duration: datetime.timedelta(); Duration of one approval
282
835
checker: subprocess.Popen(); a running checker process used
283
836
to see if the client lives.
284
837
'None' if no process is running.
285
checker_callback_tag: a gobject event source tag, or None
838
checker_callback_tag: a GLib event source tag, or None
286
839
checker_command: string; External command which is run to check
287
840
if client lives. %() expansions are done at
288
841
runtime with vars(self) as dict, so that for
289
842
instance %(name)s can be used in the command.
290
checker_initiator_tag: a gobject event source tag, or None
843
checker_initiator_tag: a GLib event source tag, or None
291
844
created: datetime.datetime(); (UTC) object creation
845
client_structure: Object describing what attributes a client has
846
and is used for storing the client at exit
292
847
current_checker_command: string; current running checker_command
293
disable_hook: If set, called by disable() as disable_hook(self)
294
disable_initiator_tag: a gobject event source tag, or None
848
disable_initiator_tag: a GLib event source tag, or None
296
850
fingerprint: string (40 or 32 hexadecimal digits); used to
297
uniquely identify the client
851
uniquely identify an OpenPGP client
852
key_id: string (64 hexadecimal digits); used to uniquely identify
853
a client using raw public keys
298
854
host: string; available for use by the checker command
299
855
interval: datetime.timedelta(); How often to start a new checker
300
856
last_approval_request: datetime.datetime(); (UTC) or None
301
857
last_checked_ok: datetime.datetime(); (UTC) or None
302
last_enabled: datetime.datetime(); (UTC)
858
last_checker_status: integer between 0 and 255 reflecting exit
859
status of last checker. -1 reflects crashed
860
checker, -2 means no checker completed yet.
861
last_checker_signal: The signal which killed the last checker, if
862
last_checker_status is -1
863
last_enabled: datetime.datetime(); (UTC) or None
303
864
name: string; from the config file, used in log messages and
304
865
D-Bus identifiers
305
866
secret: bytestring; sent verbatim (over TLS) to client
306
867
timeout: datetime.timedelta(); How long from last_checked_ok
307
868
until this client is disabled
308
extended_timeout: extra long timeout when password has been sent
869
extended_timeout: extra long timeout when secret has been sent
309
870
runtime_expansions: Allowed attributes for runtime expansion.
310
871
expires: datetime.datetime(); time (UTC) when a client will be
311
872
disabled, or None
873
server_settings: The server_settings dict from main()
314
876
runtime_expansions = ("approval_delay", "approval_duration",
315
"created", "enabled", "fingerprint",
316
"host", "interval", "last_checked_ok",
877
"created", "enabled", "expires", "key_id",
878
"fingerprint", "host", "interval",
879
"last_approval_request", "last_checked_ok",
317
880
"last_enabled", "name", "timeout")
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'
883
"extended_timeout": "PT15M",
885
"checker": "fping -q -- %%(host)s",
887
"approval_delay": "PT0S",
888
"approval_duration": "PT1S",
889
"approved_by_default": "True",
894
def config_parser(config):
895
"""Construct a new dict of client settings of this form:
896
{ client_name: {setting_name: value, ...}, ...}
897
with exceptions for any special settings as defined above.
898
NOTE: Must be a pure function. Must return the same result
899
value given the same arguments.
902
for client_name in config.sections():
903
section = dict(config.items(client_name))
904
client = settings[client_name] = {}
906
client["host"] = section["host"]
907
# Reformat values from string types to Python types
908
client["approved_by_default"] = config.getboolean(
909
client_name, "approved_by_default")
910
client["enabled"] = config.getboolean(client_name,
913
# Uppercase and remove spaces from key_id and fingerprint
914
# for later comparison purposes with return value from the
915
# key_id() and fingerprint() functions
916
client["key_id"] = (section.get("key_id", "").upper()
918
client["fingerprint"] = (section["fingerprint"].upper()
920
if "secret" in section:
921
client["secret"] = codecs.decode(section["secret"]
924
elif "secfile" in section:
925
with open(os.path.expanduser(os.path.expandvars
926
(section["secfile"])),
928
client["secret"] = secfile.read()
930
raise TypeError("No secret or secfile for section {}"
932
client["timeout"] = string_to_delta(section["timeout"])
933
client["extended_timeout"] = string_to_delta(
934
section["extended_timeout"])
935
client["interval"] = string_to_delta(section["interval"])
936
client["approval_delay"] = string_to_delta(
937
section["approval_delay"])
938
client["approval_duration"] = string_to_delta(
939
section["approval_duration"])
940
client["checker_command"] = section["checker"]
941
client["last_approval_request"] = None
942
client["last_checked_ok"] = None
943
client["last_checker_status"] = -2
947
def __init__(self, settings, name=None, server_settings=None):
949
if server_settings is None:
951
self.server_settings = server_settings
952
# adding all client settings
953
for setting, value in settings.items():
954
setattr(self, setting, value)
957
if not hasattr(self, "last_enabled"):
958
self.last_enabled = datetime.datetime.utcnow()
959
if not hasattr(self, "expires"):
960
self.expires = (datetime.datetime.utcnow()
963
self.last_enabled = None
341
966
logger.debug("Creating client %r", self.name)
342
# Uppercase and remove spaces from fingerprint for later
343
# comparison purposes with return value from the fingerprint()
345
self.fingerprint = (config["fingerprint"].upper()
967
logger.debug(" Key ID: %s", self.key_id)
347
968
logger.debug(" Fingerprint: %s", self.fingerprint)
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
self.created = settings.get("created",
970
datetime.datetime.utcnow())
972
# attributes specific for this server instance
369
973
self.checker = None
370
974
self.checker_initiator_tag = None
371
975
self.disable_initiator_tag = None
373
976
self.checker_callback_tag = None
374
self.checker_command = config["checker"]
375
977
self.current_checker_command = None
376
self.last_connect = None
377
self._approved = None
378
self.approved_by_default = config.get("approved_by_default",
380
979
self.approvals_pending = 0
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
980
self.changedstate = multiprocessing_manager.Condition(
981
multiprocessing_manager.Lock())
982
self.client_structure = [attr
983
for attr in self.__dict__.keys()
984
if not attr.startswith("_")]
985
self.client_structure.append("client_structure")
987
for name, t in inspect.getmembers(
988
type(self), lambda obj: isinstance(obj, property)):
989
if not name.startswith("_"):
990
self.client_structure.append(name)
992
# Send notice to process children that client state has changed
389
993
def send_changedstate(self):
390
self.changedstate.acquire()
391
self.changedstate.notify_all()
392
self.changedstate.release()
994
with self.changedstate:
995
self.changedstate.notify_all()
394
997
def enable(self):
395
998
"""Start this client's checker and timeout hooks"""
396
999
if getattr(self, "enabled", False):
397
1000
# 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
406
1002
self.expires = datetime.datetime.utcnow() + self.timeout
407
self.disable_initiator_tag = (gobject.timeout_add
408
(self.timeout_milliseconds(),
410
1003
self.enabled = True
411
1004
self.last_enabled = datetime.datetime.utcnow()
412
# Also start a new checker *right now*.
1006
self.send_changedstate()
415
1008
def disable(self, quiet=True):
416
1009
"""Disable this client."""
417
1010
if not getattr(self, "enabled", False):
420
self.send_changedstate()
422
1013
logger.info("Disabling client %s", self.name)
423
if getattr(self, "disable_initiator_tag", False):
424
gobject.source_remove(self.disable_initiator_tag)
1014
if getattr(self, "disable_initiator_tag", None) is not None:
1015
GLib.source_remove(self.disable_initiator_tag)
425
1016
self.disable_initiator_tag = None
426
1017
self.expires = None
427
if getattr(self, "checker_initiator_tag", False):
428
gobject.source_remove(self.checker_initiator_tag)
1018
if getattr(self, "checker_initiator_tag", None) is not None:
1019
GLib.source_remove(self.checker_initiator_tag)
429
1020
self.checker_initiator_tag = None
430
1021
self.stop_checker()
431
if self.disable_hook:
432
self.disable_hook(self)
433
1022
self.enabled = False
434
# Do not run this again if called by a gobject.timeout_add
1024
self.send_changedstate()
1025
# Do not run this again if called by a GLib.timeout_add
437
1028
def __del__(self):
438
self.disable_hook = None
441
def checker_callback(self, pid, condition, command):
1031
def init_checker(self):
1032
# Schedule a new checker to be started an 'interval' from now,
1033
# and every interval from then on.
1034
if self.checker_initiator_tag is not None:
1035
GLib.source_remove(self.checker_initiator_tag)
1036
self.checker_initiator_tag = GLib.timeout_add(
1037
int(self.interval.total_seconds() * 1000),
1039
# Schedule a disable() when 'timeout' has passed
1040
if self.disable_initiator_tag is not None:
1041
GLib.source_remove(self.disable_initiator_tag)
1042
self.disable_initiator_tag = GLib.timeout_add(
1043
int(self.timeout.total_seconds() * 1000), self.disable)
1044
# Also start a new checker *right now*.
1045
self.start_checker()
1047
def checker_callback(self, source, condition, connection,
442
1049
"""The checker has completed, so take appropriate actions."""
443
1050
self.checker_callback_tag = None
444
1051
self.checker = None
445
if os.WIFEXITED(condition):
446
exitstatus = os.WEXITSTATUS(condition)
1052
# Read return code from connection (see call_pipe)
1053
returncode = connection.recv()
1057
self.last_checker_status = returncode
1058
self.last_checker_signal = None
1059
if self.last_checker_status == 0:
448
1060
logger.info("Checker for %(name)s succeeded",
450
1062
self.checked_ok()
452
logger.info("Checker for %(name)s failed",
1064
logger.info("Checker for %(name)s failed", vars(self))
1066
self.last_checker_status = -1
1067
self.last_checker_signal = -returncode
455
1068
logger.warning("Checker for %(name)s crashed?",
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,
1072
def checked_ok(self):
1073
"""Assert that the client has been seen, alive and well."""
1074
self.last_checked_ok = datetime.datetime.utcnow()
1075
self.last_checker_status = 0
1076
self.last_checker_signal = None
1079
def bump_timeout(self, timeout=None):
1080
"""Bump up the timeout for this client."""
464
1081
if timeout is None:
465
1082
timeout = self.timeout
466
self.last_checked_ok = datetime.datetime.utcnow()
467
gobject.source_remove(self.disable_initiator_tag)
468
self.expires = datetime.datetime.utcnow() + timeout
469
self.disable_initiator_tag = (gobject.timeout_add
470
(_timedelta_to_milliseconds
471
(timeout), self.disable))
1083
if self.disable_initiator_tag is not None:
1084
GLib.source_remove(self.disable_initiator_tag)
1085
self.disable_initiator_tag = None
1086
if getattr(self, "enabled", False):
1087
self.disable_initiator_tag = GLib.timeout_add(
1088
int(timeout.total_seconds() * 1000), self.disable)
1089
self.expires = datetime.datetime.utcnow() + timeout
473
1091
def need_approval(self):
474
1092
self.last_approval_request = datetime.datetime.utcnow()
476
1094
def start_checker(self):
477
1095
"""Start a new checker subprocess if one is not running.
479
1097
If a checker already exists, leave it running and do
481
1099
# The reason for not killing a running checker is that if we
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
1100
# did that, and if a checker (for some reason) started running
1101
# slowly and taking more than 'interval' time, then the client
1102
# would inevitably timeout, since no checker would get a
1103
# chance to run to completion. If we instead leave running
486
1104
# checkers alone, the checker would have to take more time
487
1105
# than 'timeout' for the client to be disabled, which is as it
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)
1108
if self.checker is not None and not self.checker.is_alive():
1109
logger.warning("Checker was not alive; joining")
503
1112
# Start a new checker if needed
504
1113
if self.checker is None:
1114
# Escape attributes for the shell
1116
attr: re.escape(str(getattr(self, attr)))
1117
for attr in self.runtime_expansions}
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
1119
command = self.checker_command % escaped_attrs
1120
except TypeError as error:
1121
logger.error('Could not format string "%s"',
1122
self.checker_command,
1124
return True # Try again later
524
1125
self.current_checker_command = command
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
1126
logger.info("Starting checker %r for %s", command,
1128
# We don't need to redirect stdout and stderr, since
1129
# in normal mode, that is already done by daemon(),
1130
# and in debug mode we don't want to. (Stdin is
1131
# always replaced by /dev/null.)
1132
# The exception is when not debugging but nevertheless
1133
# running in the foreground; use the previously
1135
popen_args = {"close_fds": True,
1138
if (not self.server_settings["debug"]
1139
and self.server_settings["foreground"]):
1140
popen_args.update({"stdout": wnull,
1142
pipe = multiprocessing.Pipe(duplex=False)
1143
self.checker = multiprocessing.Process(
1145
args=(pipe[1], subprocess.call, command),
1147
self.checker.start()
1148
self.checker_callback_tag = GLib.io_add_watch(
1149
pipe[0].fileno(), GLib.IO_IN,
1150
self.checker_callback, pipe[0], command)
1151
# Re-run this periodically if run by GLib.timeout_add
551
1154
def stop_checker(self):
552
1155
"""Force the checker process, if any, to stop."""
553
1156
if self.checker_callback_tag:
554
gobject.source_remove(self.checker_callback_tag)
1157
GLib.source_remove(self.checker_callback_tag)
555
1158
self.checker_callback_tag = None
556
1159
if getattr(self, "checker", None) is None:
558
1161
logger.debug("Stopping checker for %(name)s", vars(self))
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
1162
self.checker.terminate()
567
1163
self.checker = None
570
def dbus_service_property(dbus_interface, signature="v",
571
access="readwrite", byte_arrays=False):
1166
def dbus_service_property(dbus_interface,
572
1170
"""Decorators for marking methods of a DBusObjectWithProperties to
573
1171
become properties on the D-Bus.
575
1173
The decorated method will be called with no arguments by "Get"
576
1174
and with one argument by "Set".
578
1176
The parameters, where they are supported, are the same as
579
1177
dbus.service.method, except there is only "signature", since the
580
1178
type from Get() and the type sent to Set() is the same.
750
1511
except (AttributeError, xml.dom.DOMException,
751
1512
xml.parsers.expat.ExpatError) as error:
752
1513
logger.error("Failed to override Introspection method",
757
def datetime_to_dbus (dt, variant_level=0):
1519
dbus.OBJECT_MANAGER_IFACE
1520
except AttributeError:
1521
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1524
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1525
"""A D-Bus object with an ObjectManager.
1527
Classes inheriting from this exposes the standard
1528
GetManagedObjects call and the InterfacesAdded and
1529
InterfacesRemoved signals on the standard
1530
"org.freedesktop.DBus.ObjectManager" interface.
1532
Note: No signals are sent automatically; they must be sent
1535
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1536
out_signature="a{oa{sa{sv}}}")
1537
def GetManagedObjects(self):
1538
"""This function must be overridden"""
1539
raise NotImplementedError()
1541
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1542
signature="oa{sa{sv}}")
1543
def InterfacesAdded(self, object_path, interfaces_and_properties):
1546
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1547
def InterfacesRemoved(self, object_path, interfaces):
1550
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1552
path_keyword='object_path',
1553
connection_keyword='connection')
1554
def Introspect(self, object_path, connection):
1555
"""Overloading of standard D-Bus method.
1557
Override return argument name of GetManagedObjects to be
1558
"objpath_interfaces_and_properties"
1560
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1564
document = xml.dom.minidom.parseString(xmlstring)
1566
for if_tag in document.getElementsByTagName("interface"):
1567
# Fix argument name for the GetManagedObjects method
1568
if (if_tag.getAttribute("name")
1569
== dbus.OBJECT_MANAGER_IFACE):
1570
for cn in if_tag.getElementsByTagName("method"):
1571
if (cn.getAttribute("name")
1572
== "GetManagedObjects"):
1573
for arg in cn.getElementsByTagName("arg"):
1574
if (arg.getAttribute("direction")
1578
"objpath_interfaces"
1580
xmlstring = document.toxml("utf-8")
1582
except (AttributeError, xml.dom.DOMException,
1583
xml.parsers.expat.ExpatError) as error:
1584
logger.error("Failed to override Introspection method",
1589
def datetime_to_dbus(dt, variant_level=0):
758
1590
"""Convert a UTC datetime.datetime() to a D-Bus type."""
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.
1592
return dbus.String("", variant_level=variant_level)
1593
return dbus.String(dt.isoformat(), variant_level=variant_level)
1596
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1597
"""A class decorator; applied to a subclass of
1598
dbus.service.Object, it will add alternate D-Bus attributes with
1599
interface names according to the "alt_interface_names" mapping.
1602
@alternate_dbus_interfaces({"org.example.Interface":
1603
"net.example.AlternateInterface"})
1604
class SampleDBusObject(dbus.service.Object):
1605
@dbus.service.method("org.example.Interface")
1606
def SampleDBusMethod():
1609
The above "SampleDBusMethod" on "SampleDBusObject" will be
1610
reachable via two interfaces: "org.example.Interface" and
1611
"net.example.AlternateInterface", the latter of which will have
1612
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1613
"true", unless "deprecate" is passed with a False value.
1615
This works for methods and signals, and also for D-Bus properties
1616
(from DBusObjectWithProperties) and interfaces (from the
1617
dbus_interface_annotations decorator).
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):
1621
for orig_interface_name, alt_interface_name in (
1622
alt_interface_names.items()):
1624
interface_names = set()
1625
# Go though all attributes of the class
1626
for attrname, attribute in inspect.getmembers(cls):
776
1627
# Ignore non-D-Bus attributes, and D-Bus attributes
777
1628
# with the wrong interface name
778
1629
if (not hasattr(attribute, "_dbus_interface")
779
or not attribute._dbus_interface
780
.startswith("se.recompile.Mandos")):
1630
or not attribute._dbus_interface.startswith(
1631
orig_interface_name)):
782
1633
# Create an alternate D-Bus interface name based on
783
1634
# the current name
784
alt_interface = (attribute._dbus_interface
785
.replace("se.recompile.Mandos",
786
"se.bsnet.fukt.Mandos"))
1635
alt_interface = attribute._dbus_interface.replace(
1636
orig_interface_name, alt_interface_name)
1637
interface_names.add(alt_interface)
787
1638
# Is this a D-Bus signal?
788
1639
if getattr(attribute, "_dbus_is_signal", False):
789
# Extract the original non-method function by
791
nonmethod_func = (dict(
1640
# Extract the original non-method undecorated
1641
# function by black magic
1642
if sys.version_info.major == 2:
1643
nonmethod_func = (dict(
792
1644
zip(attribute.func_code.co_freevars,
793
attribute.__closure__))["func"]
1645
attribute.__closure__))
1646
["func"].cell_contents)
1648
nonmethod_func = (dict(
1649
zip(attribute.__code__.co_freevars,
1650
attribute.__closure__))
1651
["func"].cell_contents)
795
1652
# Create a new, but exactly alike, function
796
1653
# object, and decorate it to be a new D-Bus signal
797
1654
# with the alternate D-Bus interface name
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)))
1655
new_function = copy_function(nonmethod_func)
1656
new_function = (dbus.service.signal(
1658
attribute._dbus_signature)(new_function))
1659
# Copy annotations, if any
1661
new_function._dbus_annotations = dict(
1662
attribute._dbus_annotations)
1663
except AttributeError:
807
1666
# Define a creator of a function to call both the
808
# old and new functions, so both the old and new
809
# signals gets sent when the function is called
1667
# original and alternate functions, so both the
1668
# original and alternate signals gets sent when
1669
# the function is called
810
1670
def fixscope(func1, func2):
811
1671
"""This function is a scope container to pass
812
1672
func1 and func2 to the "call_both" function
813
1673
outside of its arguments"""
1675
@functools.wraps(func2)
814
1676
def call_both(*args, **kwargs):
815
1677
"""This function will emit two D-Bus
816
1678
signals by calling func1 and func2"""
817
1679
func1(*args, **kwargs)
818
1680
func2(*args, **kwargs)
1681
# Make wrapper function look like a D-Bus
1683
for name, attr in inspect.getmembers(func2):
1684
if name.startswith("_dbus_"):
1685
setattr(call_both, name, attr)
819
1687
return call_both
820
1688
# Create the "call_both" function and add it to
822
attr[attrname] = fixscope(attribute,
1690
attr[attrname] = fixscope(attribute, new_function)
824
1691
# Is this a D-Bus method?
825
1692
elif getattr(attribute, "_dbus_is_method", False):
826
1693
# Create a new, but exactly alike, function
827
1694
# object. Decorate it to be a new D-Bus method
828
1695
# with the alternate D-Bus interface name. Add it
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)))
1698
dbus.service.method(
1700
attribute._dbus_in_signature,
1701
attribute._dbus_out_signature)
1702
(copy_function(attribute)))
1703
# Copy annotations, if any
1705
attr[attrname]._dbus_annotations = dict(
1706
attribute._dbus_annotations)
1707
except AttributeError:
840
1709
# Is this a D-Bus property?
841
1710
elif getattr(attribute, "_dbus_is_property", False):
842
1711
# Create a new, but exactly alike, function
843
1712
# object, and decorate it to be a new D-Bus
844
1713
# property with the alternate D-Bus interface
845
1714
# name. Add it to the class.
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)
1715
attr[attrname] = (dbus_service_property(
1716
alt_interface, attribute._dbus_signature,
1717
attribute._dbus_access,
1718
attribute._dbus_get_args_options
1720
(copy_function(attribute)))
1721
# Copy annotations, if any
1723
attr[attrname]._dbus_annotations = dict(
1724
attribute._dbus_annotations)
1725
except AttributeError:
1727
# Is this a D-Bus interface?
1728
elif getattr(attribute, "_dbus_is_interface", False):
1729
# Create a new, but exactly alike, function
1730
# object. Decorate it to be a new D-Bus interface
1731
# with the alternate D-Bus interface name. Add it
1734
dbus_interface_annotations(alt_interface)
1735
(copy_function(attribute)))
1737
# Deprecate all alternate interfaces
1738
iname = "_AlternateDBusNames_interface_annotation{}"
1739
for interface_name in interface_names:
1741
@dbus_interface_annotations(interface_name)
1743
return {"org.freedesktop.DBus.Deprecated":
1745
# Find an unused name
1746
for aname in (iname.format(i)
1747
for i in itertools.count()):
1748
if aname not in attr:
1752
# Replace the class with a new subclass of it with
1753
# methods, signals, etc. as created above.
1754
if sys.version_info.major == 2:
1755
cls = type(b"{}Alternate".format(cls.__name__),
1758
cls = type("{}Alternate".format(cls.__name__),
1765
@alternate_dbus_interfaces({"se.recompile.Mandos":
1766
"se.bsnet.fukt.Mandos"})
861
1767
class ClientDBus(Client, DBusObjectWithProperties):
862
1768
"""A Client class using D-Bus
865
1771
dbus_object_path: dbus.ObjectPath
866
1772
bus: dbus.SystemBus()
869
1775
runtime_expansions = (Client.runtime_expansions
870
+ ("dbus_object_path",))
1776
+ ("dbus_object_path", ))
1778
_interface = "se.recompile.Mandos.Client"
872
1780
# dbus.service.Object doesn't use super(), so we can't either.
874
def __init__(self, bus = None, *args, **kwargs):
875
self._approvals_pending = 0
1782
def __init__(self, bus=None, *args, **kwargs):
877
1784
Client.__init__(self, *args, **kwargs)
878
1785
# Only now, when this client is initialized, can it show up on
880
client_object_name = unicode(self.name).translate(
1787
client_object_name = str(self.name).translate(
881
1788
{ord("."): ord("_"),
882
1789
ord("-"): ord("_")})
883
self.dbus_object_path = (dbus.ObjectPath
884
("/clients/" + client_object_name))
1790
self.dbus_object_path = dbus.ObjectPath(
1791
"/clients/" + client_object_name)
885
1792
DBusObjectWithProperties.__init__(self, self.bus,
886
1793
self.dbus_object_path)
888
def notifychangeproperty(transform_func,
889
dbus_name, type_func=lambda x: x,
1795
def notifychangeproperty(transform_func, dbus_name,
1796
type_func=lambda x: x,
1798
invalidate_only=False,
1799
_interface=_interface):
891
1800
""" Modify a variable so that it's a property which announces
892
1801
its changes to DBus.
894
transform_fun: Function that takes a value and transforms it
1803
transform_fun: Function that takes a value and a variant_level
1804
and transforms it to a D-Bus type.
896
1805
dbus_name: D-Bus name of the variable
897
1806
type_func: Function that transform the value before sending it
898
1807
to the D-Bus. Default: no transform
899
1808
variant_level: D-Bus variant level. Default: 1
901
attrname = "_{0}".format(dbus_name)
1810
attrname = "_{}".format(dbus_name)
902
1812
def setter(self, value):
903
1813
if hasattr(self, "dbus_object_path"):
904
1814
if (not hasattr(self, attrname) or
905
1815
type_func(getattr(self, attrname, None))
906
1816
!= type_func(value)):
907
dbus_value = transform_func(type_func(value),
909
self.PropertyChanged(dbus.String(dbus_name),
1818
self.PropertiesChanged(
1819
_interface, dbus.Dictionary(),
1820
dbus.Array((dbus_name, )))
1822
dbus_value = transform_func(
1824
variant_level=variant_level)
1825
self.PropertyChanged(dbus.String(dbus_name),
1827
self.PropertiesChanged(
1829
dbus.Dictionary({dbus.String(dbus_name):
911
1832
setattr(self, attrname, value)
913
1834
return property(lambda self: getattr(self, attrname), setter)
916
1836
expires = notifychangeproperty(datetime_to_dbus, "Expires")
917
1837
approvals_pending = notifychangeproperty(dbus.Boolean,
918
1838
"ApprovalPending",
920
1840
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
921
1841
last_enabled = notifychangeproperty(datetime_to_dbus,
923
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
924
type_func = lambda checker:
1843
checker = notifychangeproperty(
1844
dbus.Boolean, "CheckerRunning",
1845
type_func=lambda checker: checker is not None)
926
1846
last_checked_ok = notifychangeproperty(datetime_to_dbus,
927
1847
"LastCheckedOK")
1848
last_checker_status = notifychangeproperty(dbus.Int16,
1849
"LastCheckerStatus")
928
1850
last_approval_request = notifychangeproperty(
929
1851
datetime_to_dbus, "LastApprovalRequest")
930
1852
approved_by_default = notifychangeproperty(dbus.Boolean,
931
1853
"ApprovedByDefault")
932
approval_delay = notifychangeproperty(dbus.UInt16,
935
_timedelta_to_milliseconds)
1854
approval_delay = notifychangeproperty(
1855
dbus.UInt64, "ApprovalDelay",
1856
type_func=lambda td: td.total_seconds() * 1000)
936
1857
approval_duration = notifychangeproperty(
937
dbus.UInt16, "ApprovalDuration",
938
type_func = _timedelta_to_milliseconds)
1858
dbus.UInt64, "ApprovalDuration",
1859
type_func=lambda td: td.total_seconds() * 1000)
939
1860
host = notifychangeproperty(dbus.String, "Host")
940
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
942
_timedelta_to_milliseconds)
1861
timeout = notifychangeproperty(
1862
dbus.UInt64, "Timeout",
1863
type_func=lambda td: td.total_seconds() * 1000)
943
1864
extended_timeout = notifychangeproperty(
944
dbus.UInt16, "ExtendedTimeout",
945
type_func = _timedelta_to_milliseconds)
946
interval = notifychangeproperty(dbus.UInt16,
949
_timedelta_to_milliseconds)
1865
dbus.UInt64, "ExtendedTimeout",
1866
type_func=lambda td: td.total_seconds() * 1000)
1867
interval = notifychangeproperty(
1868
dbus.UInt64, "Interval",
1869
type_func=lambda td: td.total_seconds() * 1000)
950
1870
checker_command = notifychangeproperty(dbus.String, "Checker")
1871
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1872
invalidate_only=True)
952
1874
del notifychangeproperty
954
1876
def __del__(self, *args, **kwargs):
956
1878
self.remove_from_connection()
1244
2196
self.start_checker()
1246
2198
self.stop_checker()
1248
2200
# ObjectPath - property
2202
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2203
"org.freedesktop.DBus.Deprecated": "true"})
1249
2204
@dbus_service_property(_interface, signature="o", access="read")
1250
2205
def ObjectPath_dbus_property(self):
1251
return self.dbus_object_path # is already a dbus.ObjectPath
2206
return self.dbus_object_path # is already a dbus.ObjectPath
1253
2208
# Secret = property
1254
@dbus_service_property(_interface, signature="ay",
1255
access="write", byte_arrays=True)
2210
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2212
@dbus_service_property(_interface,
1256
2216
def Secret_dbus_property(self, value):
1257
self.secret = str(value)
2217
self.secret = bytes(value)
1262
2222
class ProxyClient(object):
1263
def __init__(self, child_pipe, fpr, address):
2223
def __init__(self, child_pipe, key_id, fpr, address):
1264
2224
self._pipe = child_pipe
1265
self._pipe.send(('init', fpr, address))
2225
self._pipe.send(('init', key_id, fpr, address))
1266
2226
if not self._pipe.recv():
2227
raise KeyError(key_id or fpr)
1269
2229
def __getattribute__(self, name):
1270
if(name == '_pipe'):
1271
2231
return super(ProxyClient, self).__getattribute__(name)
1272
2232
self._pipe.send(('getattr', name))
1273
2233
data = self._pipe.recv()
1274
2234
if data[0] == 'data':
1276
2236
if data[0] == 'function':
1277
2238
def func(*args, **kwargs):
1278
2239
self._pipe.send(('funcall', name, args, kwargs))
1279
2240
return self._pipe.recv()[1]
1282
2244
def __setattr__(self, name, value):
1283
if(name == '_pipe'):
1284
2246
return super(ProxyClient, self).__setattr__(name, value)
1285
2247
self._pipe.send(('setattr', name, value))
1287
class ClientDBusTransitional(ClientDBus):
1288
__metaclass__ = AlternateDBusNamesMetaclass
1290
2250
class ClientHandler(socketserver.BaseRequestHandler, object):
1291
2251
"""A class to handle client connections.
1293
2253
Instantiated once for each connection to handle it.
1294
2254
Note: This will run in its own forked process."""
1296
2256
def handle(self):
1297
2257
with contextlib.closing(self.server.child_pipe) as child_pipe:
1298
2258
logger.info("TCP connection from: %s",
1299
unicode(self.client_address))
2259
str(self.client_address))
1300
2260
logger.debug("Pipe FD: %d",
1301
2261
self.server.child_pipe.fileno())
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",
2263
session = gnutls.ClientSession(self.request)
2265
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2266
# "+AES-256-CBC", "+SHA1",
2267
# "+COMP-NULL", "+CTYPE-OPENPGP",
1317
2269
# Use a fallback default, since this MUST be set.
1318
2270
priority = self.server.gnutls_priority
1319
2271
if priority is None:
1320
2272
priority = "NORMAL"
1321
(gnutls.library.functions
1322
.gnutls_priority_set_direct(session._c_object,
2273
gnutls.priority_set_direct(session._c_object,
2274
priority.encode("utf-8"),
1325
2277
# Start communication using the Mandos protocol
1326
2278
# Get protocol number
1327
2279
line = self.request.makefile().readline()
1328
2280
logger.debug("Protocol version: %r", line)
1330
2282
if int(line.strip().split()[0]) > 1:
2283
raise RuntimeError(line)
1332
2284
except (ValueError, IndexError, RuntimeError) as error:
1333
2285
logger.error("Unknown protocol version: %s", error)
1336
2288
# Start GnuTLS connection
1338
2290
session.handshake()
1339
except gnutls.errors.GNUTLSError as error:
2291
except gnutls.Error as error:
1340
2292
logger.warning("Handshake failed: %s", error)
1341
2293
# Do not run session.bye() here: the session is not
1342
2294
# established. Just abandon the request.
1344
2296
logger.debug("Handshake succeeded")
1346
2298
approval_required = False
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,
2300
if gnutls.has_rawpk:
2303
key_id = self.key_id(
2304
self.peer_certificate(session))
2305
except (TypeError, gnutls.Error) as error:
2306
logger.warning("Bad certificate: %s", error)
2308
logger.debug("Key ID: %s", key_id)
2313
fpr = self.fingerprint(
2314
self.peer_certificate(session))
2315
except (TypeError, gnutls.Error) as error:
2316
logger.warning("Bad certificate: %s", error)
2318
logger.debug("Fingerprint: %s", fpr)
2321
client = ProxyClient(child_pipe, key_id, fpr,
1359
2322
self.client_address)
1360
2323
except KeyError:
1363
2326
if client.approval_delay:
1364
2327
delay = client.approval_delay
1365
2328
client.approvals_pending += 1
1366
2329
approval_required = True
1369
2332
if not client.enabled:
1370
2333
logger.info("Client %s is disabled",
1372
2335
if self.server.use_dbus:
1373
2336
# Emit D-Bus signal
1374
2337
client.Rejected("Disabled")
1377
if client._approved or not client.approval_delay:
1378
#We are approved or approval is disabled
2340
if client.approved or not client.approval_delay:
2341
# We are approved or approval is disabled
1380
elif client._approved is None:
2343
elif client.approved is None:
1381
2344
logger.info("Client %s needs approval",
1383
2346
if self.server.use_dbus:
1384
2347
# Emit D-Bus signal
1385
2348
client.NeedApproval(
1386
client.approval_delay_milliseconds(),
1387
client.approved_by_default)
2349
client.approval_delay.total_seconds()
2350
* 1000, client.approved_by_default)
1389
2352
logger.warning("Client %s was not approved",
1418
2377
delay -= time2 - time
1421
while sent_size < len(client.secret):
1423
sent = session.send(client.secret[sent_size:])
1424
except gnutls.errors.GNUTLSError as error:
1425
logger.warning("gnutls send failed")
1427
logger.debug("Sent: %d, remaining: %d",
1428
sent, len(client.secret)
1429
- (sent_size + sent))
2380
session.send(client.secret)
2381
except gnutls.Error as error:
2382
logger.warning("gnutls send failed",
1432
2386
logger.info("Sending secret to %s", client.name)
1433
# bump the timeout as if seen
1434
client.checked_ok(client.extended_timeout)
2387
# bump the timeout using extended_timeout
2388
client.bump_timeout(client.extended_timeout)
1435
2389
if self.server.use_dbus:
1436
2390
# Emit D-Bus signal
1437
2391
client.GotSecret()
1440
2394
if approval_required:
1441
2395
client.approvals_pending -= 1
1444
except gnutls.errors.GNUTLSError as error:
1445
logger.warning("GnuTLS bye failed")
2398
except gnutls.Error as error:
2399
logger.warning("GnuTLS bye failed",
1448
2403
def peer_certificate(session):
1449
"Return the peer's OpenPGP certificate as a bytestring"
1450
# If not an OpenPGP certificate...
1451
if (gnutls.library.functions
1452
.gnutls_certificate_type_get(session._c_object)
1453
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1454
# ...do the normal thing
1455
return session.peer_certificate
2404
"Return the peer's certificate as a bytestring"
2406
cert_type = gnutls.certificate_type_get2(session._c_object,
2408
except AttributeError:
2409
cert_type = gnutls.certificate_type_get(session._c_object)
2410
if gnutls.has_rawpk:
2411
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2413
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2414
# If not a valid certificate type...
2415
if cert_type not in valid_cert_types:
2416
logger.info("Cert type %r not in %r", cert_type,
2418
# ...return invalid data
1456
2420
list_size = ctypes.c_uint(1)
1457
cert_list = (gnutls.library.functions
1458
.gnutls_certificate_get_peers
2421
cert_list = (gnutls.certificate_get_peers
1459
2422
(session._c_object, ctypes.byref(list_size)))
1460
2423
if not bool(cert_list) and list_size.value != 0:
1461
raise gnutls.errors.GNUTLSError("error getting peer"
2424
raise gnutls.Error("error getting peer certificate")
1463
2425
if list_size.value == 0:
1465
2427
cert = cert_list[0]
1466
2428
return ctypes.string_at(cert.data, cert.size)
2431
def key_id(certificate):
2432
"Convert a certificate bytestring to a hexdigit key ID"
2433
# New GnuTLS "datum" with the public key
2434
datum = gnutls.datum_t(
2435
ctypes.cast(ctypes.c_char_p(certificate),
2436
ctypes.POINTER(ctypes.c_ubyte)),
2437
ctypes.c_uint(len(certificate)))
2438
# XXX all these need to be created in the gnutls "module"
2439
# New empty GnuTLS certificate
2440
pubkey = gnutls.pubkey_t()
2441
gnutls.pubkey_init(ctypes.byref(pubkey))
2442
# Import the raw public key into the certificate
2443
gnutls.pubkey_import(pubkey,
2444
ctypes.byref(datum),
2445
gnutls.X509_FMT_DER)
2446
# New buffer for the key ID
2447
buf = ctypes.create_string_buffer(32)
2448
buf_len = ctypes.c_size_t(len(buf))
2449
# Get the key ID from the raw public key into the buffer
2450
gnutls.pubkey_get_key_id(pubkey,
2451
gnutls.KEYID_USE_SHA256,
2452
ctypes.cast(ctypes.byref(buf),
2453
ctypes.POINTER(ctypes.c_ubyte)),
2454
ctypes.byref(buf_len))
2455
# Deinit the certificate
2456
gnutls.pubkey_deinit(pubkey)
2458
# Convert the buffer to a Python bytestring
2459
key_id = ctypes.string_at(buf, buf_len.value)
2460
# Convert the bytestring to hexadecimal notation
2461
hex_key_id = binascii.hexlify(key_id).upper()
1469
2465
def fingerprint(openpgp):
1470
2466
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1471
2467
# New GnuTLS "datum" with the OpenPGP public key
1472
datum = (gnutls.library.types
1473
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1476
ctypes.c_uint(len(openpgp))))
2468
datum = gnutls.datum_t(
2469
ctypes.cast(ctypes.c_char_p(openpgp),
2470
ctypes.POINTER(ctypes.c_ubyte)),
2471
ctypes.c_uint(len(openpgp)))
1477
2472
# New empty GnuTLS certificate
1478
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1479
(gnutls.library.functions
1480
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2473
crt = gnutls.openpgp_crt_t()
2474
gnutls.openpgp_crt_init(ctypes.byref(crt))
1481
2475
# Import the OpenPGP public key into the certificate
1482
(gnutls.library.functions
1483
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1484
gnutls.library.constants
1485
.GNUTLS_OPENPGP_FMT_RAW))
2476
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2477
gnutls.OPENPGP_FMT_RAW)
1486
2478
# Verify the self signature in the key
1487
2479
crtverify = ctypes.c_uint()
1488
(gnutls.library.functions
1489
.gnutls_openpgp_crt_verify_self(crt, 0,
1490
ctypes.byref(crtverify)))
2480
gnutls.openpgp_crt_verify_self(crt, 0,
2481
ctypes.byref(crtverify))
1491
2482
if crtverify.value != 0:
1492
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1493
raise (gnutls.errors.CertificateSecurityError
2483
gnutls.openpgp_crt_deinit(crt)
2484
raise gnutls.CertificateSecurityError(code
1495
2486
# New buffer for the fingerprint
1496
2487
buf = ctypes.create_string_buffer(20)
1497
2488
buf_len = ctypes.c_size_t()
1498
2489
# Get the fingerprint from the certificate into the buffer
1499
(gnutls.library.functions
1500
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1501
ctypes.byref(buf_len)))
2490
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2491
ctypes.byref(buf_len))
1502
2492
# Deinit the certificate
1503
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2493
gnutls.openpgp_crt_deinit(crt)
1504
2494
# Convert the buffer to a Python bytestring
1505
2495
fpr = ctypes.string_at(buf, buf_len.value)
1506
2496
# Convert the bytestring to hexadecimal notation
1507
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2497
hex_fpr = binascii.hexlify(fpr).upper()
1511
2501
class MultiprocessingMixIn(object):
1512
2502
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1513
2504
def sub_process_main(self, request, address):
1515
2506
self.finish_request(request, address)
1517
2508
self.handle_error(request, address)
1518
2509
self.close_request(request)
1520
2511
def process_request(self, request, address):
1521
2512
"""Start a new process to process the request."""
1522
multiprocessing.Process(target = self.sub_process_main,
1523
args = (request, address)).start()
2513
proc = multiprocessing.Process(target=self.sub_process_main,
2514
args=(request, address))
1526
2519
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1527
2520
""" adds a pipe to the MixIn """
1528
2522
def process_request(self, request, client_address):
1529
2523
"""Overrides and wraps the original process_request().
1531
2525
This function creates a new pipe in self.pipe
1533
2527
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1535
super(MultiprocessingMixInWithPipe,
1536
self).process_request(request, client_address)
2529
proc = MultiprocessingMixIn.process_request(self, request,
1537
2531
self.child_pipe.close()
1538
self.add_pipe(parent_pipe)
1540
def add_pipe(self, parent_pipe):
2532
self.add_pipe(parent_pipe, proc)
2534
def add_pipe(self, parent_pipe, proc):
1541
2535
"""Dummy function; override as necessary"""
1542
raise NotImplementedError
2536
raise NotImplementedError()
1545
2539
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1546
2540
socketserver.TCPServer, object):
1547
2541
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1550
2544
enabled: Boolean; whether this server is activated yet
1551
2545
interface: None or a network interface name (string)
1552
2546
use_ipv6: Boolean; to use IPv6 or not
1554
2549
def __init__(self, server_address, RequestHandlerClass,
1555
interface=None, use_ipv6=True):
2553
"""If socketfd is set, use that file descriptor instead of
2554
creating a new one with socket.socket().
1556
2556
self.interface = interface
1558
2558
self.address_family = socket.AF_INET6
2559
if socketfd is not None:
2560
# Save the file descriptor
2561
self.socketfd = socketfd
2562
# Save the original socket.socket() function
2563
self.socket_socket = socket.socket
2565
# To implement --socket, we monkey patch socket.socket.
2567
# (When socketserver.TCPServer is a new-style class, we
2568
# could make self.socket into a property instead of monkey
2569
# patching socket.socket.)
2571
# Create a one-time-only replacement for socket.socket()
2572
@functools.wraps(socket.socket)
2573
def socket_wrapper(*args, **kwargs):
2574
# Restore original function so subsequent calls are
2576
socket.socket = self.socket_socket
2577
del self.socket_socket
2578
# This time only, return a new socket object from the
2579
# saved file descriptor.
2580
return socket.fromfd(self.socketfd, *args, **kwargs)
2581
# Replace socket.socket() function with wrapper
2582
socket.socket = socket_wrapper
2583
# The socketserver.TCPServer.__init__ will call
2584
# socket.socket(), which might be our replacement,
2585
# socket_wrapper(), if socketfd was set.
1559
2586
socketserver.TCPServer.__init__(self, server_address,
1560
2587
RequestHandlerClass)
1561
2589
def server_bind(self):
1562
2590
"""This overrides the normal server_bind() function
1563
2591
to bind to an interface if one was specified, and also NOT to
1564
2592
bind to an address or port if they were not specified."""
2593
global SO_BINDTODEVICE
1565
2594
if self.interface is not None:
1566
2595
if SO_BINDTODEVICE is None:
1567
logger.error("SO_BINDTODEVICE does not exist;"
1568
" cannot bind to interface %s",
1572
self.socket.setsockopt(socket.SOL_SOCKET,
1576
except socket.error as error:
1577
if error[0] == errno.EPERM:
1578
logger.error("No permission to"
1579
" bind to interface %s",
1581
elif error[0] == errno.ENOPROTOOPT:
1582
logger.error("SO_BINDTODEVICE not available;"
1583
" cannot bind to interface %s",
2596
# Fall back to a hard-coded value which seems to be
2598
logger.warning("SO_BINDTODEVICE not found, trying 25")
2599
SO_BINDTODEVICE = 25
2601
self.socket.setsockopt(
2602
socket.SOL_SOCKET, SO_BINDTODEVICE,
2603
(self.interface + "\0").encode("utf-8"))
2604
except socket.error as error:
2605
if error.errno == errno.EPERM:
2606
logger.error("No permission to bind to"
2607
" interface %s", self.interface)
2608
elif error.errno == errno.ENOPROTOOPT:
2609
logger.error("SO_BINDTODEVICE not available;"
2610
" cannot bind to interface %s",
2612
elif error.errno == errno.ENODEV:
2613
logger.error("Interface %s does not exist,"
2614
" cannot bind", self.interface)
1587
2617
# Only bind(2) the socket if we really need to.
1588
2618
if self.server_address[0] or self.server_address[1]:
1589
2619
if not self.server_address[0]:
1590
2620
if self.address_family == socket.AF_INET6:
1591
any_address = "::" # in6addr_any
2621
any_address = "::" # in6addr_any
1593
any_address = socket.INADDR_ANY
2623
any_address = "0.0.0.0" # INADDR_ANY
1594
2624
self.server_address = (any_address,
1595
2625
self.server_address[1])
1596
2626
elif not self.server_address[1]:
1597
self.server_address = (self.server_address[0],
2627
self.server_address = (self.server_address[0], 0)
1599
2628
# if self.interface:
1600
2629
# self.server_address = (self.server_address[0],
1840
2955
parser.add_argument("--no-dbus", action="store_false",
1841
2956
dest="use_dbus", help="Do not provide D-Bus"
1842
" system bus interface")
2957
" system bus interface", default=None)
1843
2958
parser.add_argument("--no-ipv6", action="store_false",
1844
dest="use_ipv6", help="Do not use IPv6")
2959
dest="use_ipv6", help="Do not use IPv6",
2961
parser.add_argument("--no-restore", action="store_false",
2962
dest="restore", help="Do not restore stored"
2963
" state", default=None)
2964
parser.add_argument("--socket", type=int,
2965
help="Specify a file descriptor to a network"
2966
" socket to use instead of creating one")
2967
parser.add_argument("--statedir", metavar="DIR",
2968
help="Directory to save/restore state in")
2969
parser.add_argument("--foreground", action="store_true",
2970
help="Run in foreground", default=None)
2971
parser.add_argument("--no-zeroconf", action="store_false",
2972
dest="zeroconf", help="Do not use Zeroconf",
1845
2975
options = parser.parse_args()
1847
2977
if options.check:
2979
fail_count, test_count = doctest.testmod()
2980
sys.exit(os.EX_OK if fail_count == 0 else 1)
1852
2982
# Default values for config file for server-global settings
1853
server_defaults = { "interface": "",
1858
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1859
"servicename": "Mandos",
2983
if gnutls.has_rawpk:
2984
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2985
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2987
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2988
":+SIGN-DSA-SHA256")
2989
server_defaults = {"interface": "",
2993
"priority": priority,
2994
"servicename": "Mandos",
3000
"statedir": "/var/lib/mandos",
3001
"foreground": "False",
1865
3006
# Parse config file for server-global settings
1866
3007
server_config = configparser.SafeConfigParser(server_defaults)
1867
3008
del server_defaults
1868
server_config.read(os.path.join(options.configdir,
3009
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1870
3010
# Convert the SafeConfigParser object to a dict
1871
3011
server_settings = server_config.defaults()
1872
3012
# Use the appropriate methods on the non-string config options
1873
for option in ("debug", "use_dbus", "use_ipv6"):
3013
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3014
"foreground", "zeroconf"):
1874
3015
server_settings[option] = server_config.getboolean("DEFAULT",
1876
3017
if server_settings["port"]:
1877
3018
server_settings["port"] = server_config.getint("DEFAULT",
3020
if server_settings["socket"]:
3021
server_settings["socket"] = server_config.getint("DEFAULT",
3023
# Later, stdin will, and stdout and stderr might, be dup'ed
3024
# over with an opened os.devnull. But we don't want this to
3025
# happen with a supplied network socket.
3026
if 0 <= server_settings["socket"] <= 2:
3027
server_settings["socket"] = os.dup(server_settings
1879
3029
del server_config
1881
3031
# Override the settings from the config file with command line
1882
3032
# options, if set.
1883
3033
for option in ("interface", "address", "port", "debug",
1884
"priority", "servicename", "configdir",
1885
"use_dbus", "use_ipv6", "debuglevel"):
3034
"priority", "servicename", "configdir", "use_dbus",
3035
"use_ipv6", "debuglevel", "restore", "statedir",
3036
"socket", "foreground", "zeroconf"):
1886
3037
value = getattr(options, option)
1887
3038
if value is not None:
1888
3039
server_settings[option] = value
1890
3041
# Force all strings to be unicode
1891
3042
for option in server_settings.keys():
1892
if type(server_settings[option]) is str:
1893
server_settings[option] = unicode(server_settings[option])
3043
if isinstance(server_settings[option], bytes):
3044
server_settings[option] = (server_settings[option]
3046
# Force all boolean options to be boolean
3047
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3048
"foreground", "zeroconf"):
3049
server_settings[option] = bool(server_settings[option])
3050
# Debug implies foreground
3051
if server_settings["debug"]:
3052
server_settings["foreground"] = True
1894
3053
# Now we have our good server settings in "server_settings"
1896
3055
##################################################################
3057
if (not server_settings["zeroconf"]
3058
and not (server_settings["port"]
3059
or server_settings["socket"] != "")):
3060
parser.error("Needs port or socket to work without Zeroconf")
1898
3062
# For convenience
1899
3063
debug = server_settings["debug"]
1900
3064
debuglevel = server_settings["debuglevel"]
1901
3065
use_dbus = server_settings["use_dbus"]
1902
3066
use_ipv6 = server_settings["use_ipv6"]
3067
stored_state_path = os.path.join(server_settings["statedir"],
3069
foreground = server_settings["foreground"]
3070
zeroconf = server_settings["zeroconf"]
3073
initlogger(debug, logging.DEBUG)
3078
level = getattr(logging, debuglevel.upper())
3079
initlogger(debug, level)
1904
3081
if server_settings["servicename"] != "Mandos":
1905
syslogger.setFormatter(logging.Formatter
1906
('Mandos (%s) [%%(process)d]:'
1907
' %%(levelname)s: %%(message)s'
1908
% server_settings["servicename"]))
3082
syslogger.setFormatter(
3083
logging.Formatter('Mandos ({}) [%(process)d]:'
3084
' %(levelname)s: %(message)s'.format(
3085
server_settings["servicename"])))
1910
3087
# Parse config file with clients
1911
client_defaults = { "timeout": "5m",
1912
"extended_timeout": "15m",
1914
"checker": "fping -q -- %%(host)s",
1916
"approval_delay": "0s",
1917
"approval_duration": "1s",
1919
client_config = configparser.SafeConfigParser(client_defaults)
3088
client_config = configparser.SafeConfigParser(Client
1920
3090
client_config.read(os.path.join(server_settings["configdir"],
1921
3091
"clients.conf"))
1923
3093
global mandos_dbus_service
1924
3094
mandos_dbus_service = None
1926
tcp_server = MandosServer((server_settings["address"],
1927
server_settings["port"]),
1929
interface=(server_settings["interface"]
1933
server_settings["priority"],
1936
pidfilename = "/var/run/mandos.pid"
1938
pidfile = open(pidfilename, "w")
1940
logger.error("Could not open file %r", pidfilename)
1943
uid = pwd.getpwnam("_mandos").pw_uid
1944
gid = pwd.getpwnam("_mandos").pw_gid
1947
uid = pwd.getpwnam("mandos").pw_uid
1948
gid = pwd.getpwnam("mandos").pw_gid
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
1949
3125
except KeyError:
1951
uid = pwd.getpwnam("nobody").pw_uid
1952
gid = pwd.getpwnam("nobody").pw_gid
3134
logger.debug("Did setuid/setgid to {}:{}".format(uid,
1959
3136
except OSError as error:
1960
if error[0] != errno.EPERM:
1963
if not debug and not debuglevel:
1964
syslogger.setLevel(logging.WARNING)
1965
console.setLevel(logging.WARNING)
1967
level = getattr(logging, debuglevel.upper())
1968
syslogger.setLevel(level)
1969
console.setLevel(level)
3137
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3138
.format(uid, gid, os.strerror(error.errno)))
3139
if error.errno != errno.EPERM:
1972
3143
# Enable all possible GnuTLS debugging
1974
3145
# "Use a log level over 10 to enable all debugging options."
1975
3146
# - GnuTLS manual
1976
gnutls.library.functions.gnutls_global_set_log_level(11)
1978
@gnutls.library.types.gnutls_log_func
3147
gnutls.global_set_log_level(11)
1979
3150
def debug_gnutls(level, string):
1980
3151
logger.debug("GnuTLS: %s", string[:-1])
1982
(gnutls.library.functions
1983
.gnutls_global_set_log_function(debug_gnutls))
3153
gnutls.global_set_log_function(debug_gnutls)
1985
3155
# Redirect stdin so all checkers get /dev/null
1986
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3156
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1987
3157
os.dup2(null, sys.stdin.fileno())
1991
# No console logging
1992
logger.removeHandler(console)
1994
3161
# Need to fork before connecting to D-Bus
1996
3163
# Close all input and output, do double fork, etc.
3166
# multiprocessing will use threads, so before we use GLib we need
3167
# to inform GLib that threads will be used.
1999
3170
global main_loop
2000
3171
# From the Avahi example code
2001
DBusGMainLoop(set_as_default=True )
2002
main_loop = gobject.MainLoop()
3172
DBusGMainLoop(set_as_default=True)
3173
main_loop = GLib.MainLoop()
2003
3174
bus = dbus.SystemBus()
2004
3175
# End of Avahi example code
2007
3178
bus_name = dbus.service.BusName("se.recompile.Mandos",
2008
bus, do_not_queue=True)
2009
old_bus_name = (dbus.service.BusName
2010
("se.bsnet.fukt.Mandos", bus,
2012
except dbus.exceptions.NameExistsException as e:
2013
logger.error(unicode(e) + ", disabling D-Bus")
3181
old_bus_name = dbus.service.BusName(
3182
"se.bsnet.fukt.Mandos", bus,
3184
except dbus.exceptions.DBusException as e:
3185
logger.error("Disabling D-Bus:", exc_info=e)
2014
3186
use_dbus = False
2015
3187
server_settings["use_dbus"] = False
2016
3188
tcp_server.use_dbus = False
2017
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2018
service = AvahiService(name = server_settings["servicename"],
2019
servicetype = "_mandos._tcp",
2020
protocol = protocol, bus = bus)
2021
if server_settings["interface"]:
2022
service.interface = (if_nametoindex
2023
(str(server_settings["interface"])))
3190
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3191
service = AvahiServiceToSyslog(
3192
name=server_settings["servicename"],
3193
servicetype="_mandos._tcp",
3196
if server_settings["interface"]:
3197
service.interface = if_nametoindex(
3198
server_settings["interface"].encode("utf-8"))
2025
3200
global multiprocessing_manager
2026
3201
multiprocessing_manager = multiprocessing.Manager()
2028
3203
client_class = Client
2030
client_class = functools.partial(ClientDBusTransitional,
2032
def client_config_items(config, section):
2033
special_settings = {
2034
"approved_by_default":
2035
lambda: config.getboolean(section,
2036
"approved_by_default"),
2038
for name, value in config.items(section):
3205
client_class = functools.partial(ClientDBus, bus=bus)
3207
client_settings = Client.config_parser(client_config)
3208
old_client_settings = {}
3211
# This is used to redirect stdout and stderr for checker processes
3213
wnull = open(os.devnull, "w") # A writable /dev/null
3214
# Only used if server is running in foreground but not in debug
3216
if debug or not foreground:
3219
# Get client data and settings from last running state.
3220
if server_settings["restore"]:
3222
with open(stored_state_path, "rb") as stored_state:
3223
if sys.version_info.major == 2:
3224
clients_data, old_client_settings = pickle.load(
3227
bytes_clients_data, bytes_old_client_settings = (
3228
pickle.load(stored_state, encoding="bytes"))
3229
# Fix bytes to strings
3232
clients_data = {(key.decode("utf-8")
3233
if isinstance(key, bytes)
3236
bytes_clients_data.items()}
3237
del bytes_clients_data
3238
for key in clients_data:
3239
value = {(k.decode("utf-8")
3240
if isinstance(k, bytes) else k): v
3242
clients_data[key].items()}
3243
clients_data[key] = value
3245
value["client_structure"] = [
3247
if isinstance(s, bytes)
3249
value["client_structure"]]
3251
for k in ("name", "host"):
3252
if isinstance(value[k], bytes):
3253
value[k] = value[k].decode("utf-8")
3254
if not value.has_key("key_id"):
3255
value["key_id"] = ""
3256
elif not value.has_key("fingerprint"):
3257
value["fingerprint"] = ""
3258
# old_client_settings
3260
old_client_settings = {
3261
(key.decode("utf-8")
3262
if isinstance(key, bytes)
3265
bytes_old_client_settings.items()}
3266
del bytes_old_client_settings
3268
for value in old_client_settings.values():
3269
if isinstance(value["host"], bytes):
3270
value["host"] = (value["host"]
3272
os.remove(stored_state_path)
3273
except IOError as e:
3274
if e.errno == errno.ENOENT:
3275
logger.warning("Could not load persistent state:"
3276
" {}".format(os.strerror(e.errno)))
3278
logger.critical("Could not load persistent state:",
3281
except EOFError as e:
3282
logger.warning("Could not load persistent state: "
3286
with PGPEngine() as pgp:
3287
for client_name, client in clients_data.items():
3288
# Skip removed clients
3289
if client_name not in client_settings:
3292
# Decide which value to use after restoring saved state.
3293
# We have three different values: Old config file,
3294
# new config file, and saved state.
3295
# New config value takes precedence if it differs from old
3296
# config value, otherwise use saved state.
3297
for name, value in client_settings[client_name].items():
3299
# For each value in new config, check if it
3300
# differs from the old config value (Except for
3301
# the "secret" attribute)
3302
if (name != "secret"
3304
old_client_settings[client_name][name])):
3305
client[name] = value
3309
# Clients who has passed its expire date can still be
3310
# enabled if its last checker was successful. A Client
3311
# whose checker succeeded before we stored its state is
3312
# assumed to have successfully run all checkers during
3314
if client["enabled"]:
3315
if datetime.datetime.utcnow() >= client["expires"]:
3316
if not client["last_checked_ok"]:
3318
"disabling client {} - Client never "
3319
"performed a successful checker".format(
3321
client["enabled"] = False
3322
elif client["last_checker_status"] != 0:
3324
"disabling client {} - Client last"
3325
" checker failed with error code"
3328
client["last_checker_status"]))
3329
client["enabled"] = False
3331
client["expires"] = (
3332
datetime.datetime.utcnow()
3333
+ client["timeout"])
3334
logger.debug("Last checker succeeded,"
3335
" keeping {} enabled".format(
2040
yield (name, special_settings[name]())
2044
tcp_server.clients.update(set(
2045
client_class(name = section,
2046
config= dict(client_config_items(
2047
client_config, section)))
2048
for section in client_config.sections()))
3338
client["secret"] = pgp.decrypt(
3339
client["encrypted_secret"],
3340
client_settings[client_name]["secret"])
3342
# If decryption fails, we use secret from new settings
3343
logger.debug("Failed to decrypt {} old secret".format(
3345
client["secret"] = (client_settings[client_name]
3348
# Add/remove clients based on new changes made to config
3349
for client_name in (set(old_client_settings)
3350
- set(client_settings)):
3351
del clients_data[client_name]
3352
for client_name in (set(client_settings)
3353
- set(old_client_settings)):
3354
clients_data[client_name] = client_settings[client_name]
3356
# Create all client objects
3357
for client_name, client in clients_data.items():
3358
tcp_server.clients[client_name] = client_class(
3361
server_settings=server_settings)
2049
3363
if not tcp_server.clients:
2050
3364
logger.warning("No clients defined")
2056
pidfile.write(str(pid) + "\n".encode("utf-8"))
2059
logger.error("Could not write to file %r with PID %d",
2062
# "pidfile" was never created
3367
if pidfile is not None:
3371
print(pid, file=pidfile)
3373
logger.error("Could not write to file %r with PID %d",
2064
3376
del pidfilename
2066
signal.signal(signal.SIGINT, signal.SIG_IGN)
2068
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2069
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3378
for termsig in (signal.SIGHUP, signal.SIGTERM):
3379
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3380
lambda: main_loop.quit() and False)
2072
class MandosDBusService(dbus.service.Object):
3384
@alternate_dbus_interfaces(
3385
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3386
class MandosDBusService(DBusObjectWithObjectManager):
2073
3387
"""A D-Bus proxy object"""
2074
3389
def __init__(self):
2075
3390
dbus.service.Object.__init__(self, bus, "/")
2076
3392
_interface = "se.recompile.Mandos"
2078
3394
@dbus.service.signal(_interface, signature="o")
2079
3395
def ClientAdded(self, objpath):
2083
3399
@dbus.service.signal(_interface, signature="ss")
2084
def ClientNotFound(self, fingerprint, address):
3400
def ClientNotFound(self, key_id, address):
3404
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2088
3406
@dbus.service.signal(_interface, signature="os")
2089
3407
def ClientRemoved(self, objpath, name):
3411
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2093
3413
@dbus.service.method(_interface, out_signature="ao")
2094
3414
def GetAllClients(self):
2096
return dbus.Array(c.dbus_object_path
2097
for c in tcp_server.clients)
3416
return dbus.Array(c.dbus_object_path for c in
3417
tcp_server.clients.values())
3419
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2099
3421
@dbus.service.method(_interface,
2100
3422
out_signature="a{oa{sv}}")
2101
3423
def GetAllClientsWithProperties(self):
2103
3425
return dbus.Dictionary(
2104
((c.dbus_object_path, c.GetAll(""))
2105
for c in tcp_server.clients),
3426
{c.dbus_object_path: c.GetAll(
3427
"se.recompile.Mandos.Client")
3428
for c in tcp_server.clients.values()},
2106
3429
signature="oa{sv}")
2108
3431
@dbus.service.method(_interface, in_signature="o")
2109
3432
def RemoveClient(self, object_path):
2111
for c in tcp_server.clients:
3434
for c in tcp_server.clients.values():
2112
3435
if c.dbus_object_path == object_path:
2113
tcp_server.clients.remove(c)
3436
del tcp_server.clients[c.name]
2114
3437
c.remove_from_connection()
2115
# Don't signal anything except ClientRemoved
3438
# Don't signal the disabling
2116
3439
c.disable(quiet=True)
2118
self.ClientRemoved(object_path, c.name)
3440
# Emit D-Bus signal for removal
3441
self.client_removed_signal(c)
2120
3443
raise KeyError(object_path)
2124
class MandosDBusServiceTransitional(MandosDBusService):
2125
__metaclass__ = AlternateDBusNamesMetaclass
2126
mandos_dbus_service = MandosDBusServiceTransitional()
3447
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3448
out_signature="a{oa{sa{sv}}}")
3449
def GetManagedObjects(self):
3451
return dbus.Dictionary(
3452
{client.dbus_object_path:
3454
{interface: client.GetAll(interface)
3456
client._get_all_interface_names()})
3457
for client in tcp_server.clients.values()})
3459
def client_added_signal(self, client):
3460
"""Send the new standard signal and the old signal"""
3462
# New standard signal
3463
self.InterfacesAdded(
3464
client.dbus_object_path,
3466
{interface: client.GetAll(interface)
3468
client._get_all_interface_names()}))
3470
self.ClientAdded(client.dbus_object_path)
3472
def client_removed_signal(self, client):
3473
"""Send the new standard signal and the old signal"""
3475
# New standard signal
3476
self.InterfacesRemoved(
3477
client.dbus_object_path,
3478
client._get_all_interface_names())
3480
self.ClientRemoved(client.dbus_object_path,
3483
mandos_dbus_service = MandosDBusService()
3485
# Save modules to variables to exempt the modules from being
3486
# unloaded before the function registered with atexit() is run.
3487
mp = multiprocessing
2129
3491
"Cleanup function; run on exit"
3495
mp.active_children()
3497
if not (tcp_server.clients or client_settings):
3500
# Store client before exiting. Secrets are encrypted with key
3501
# based on what config file has. If config file is
3502
# removed/edited, old secret will thus be unrecovable.
3504
with PGPEngine() as pgp:
3505
for client in tcp_server.clients.values():
3506
key = client_settings[client.name]["secret"]
3507
client.encrypted_secret = pgp.encrypt(client.secret,
3511
# A list of attributes that can not be pickled
3513
exclude = {"bus", "changedstate", "secret",
3514
"checker", "server_settings"}
3515
for name, typ in inspect.getmembers(dbus.service
3519
client_dict["encrypted_secret"] = (client
3521
for attr in client.client_structure:
3522
if attr not in exclude:
3523
client_dict[attr] = getattr(client, attr)
3525
clients[client.name] = client_dict
3526
del client_settings[client.name]["secret"]
3529
with tempfile.NamedTemporaryFile(
3533
dir=os.path.dirname(stored_state_path),
3534
delete=False) as stored_state:
3535
pickle.dump((clients, client_settings), stored_state,
3537
tempname = stored_state.name
3538
os.rename(tempname, stored_state_path)
3539
except (IOError, OSError) as e:
3545
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3546
logger.warning("Could not save persistent state: {}"
3547
.format(os.strerror(e.errno)))
3549
logger.warning("Could not save persistent state:",
3553
# Delete all clients, and settings from config
2132
3554
while tcp_server.clients:
2133
client = tcp_server.clients.pop()
3555
name, client = tcp_server.clients.popitem()
2135
3557
client.remove_from_connection()
2136
client.disable_hook = None
2137
# Don't signal anything except ClientRemoved
3558
# Don't signal the disabling
2138
3559
client.disable(quiet=True)
3560
# Emit D-Bus signal for removal
2141
mandos_dbus_service.ClientRemoved(client
3562
mandos_dbus_service.client_removed_signal(client)
3563
client_settings.clear()
2145
3565
atexit.register(cleanup)
2147
for client in tcp_server.clients:
3567
for client in tcp_server.clients.values():
2150
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3569
# Emit D-Bus signal for adding
3570
mandos_dbus_service.client_added_signal(client)
3571
# Need to initiate checking of clients
3573
client.init_checker()
2153
3575
tcp_server.enable()
2154
3576
tcp_server.server_activate()
2156
3578
# Find out what port we got
2157
service.port = tcp_server.socket.getsockname()[1]
3580
service.port = tcp_server.socket.getsockname()[1]
2159
3582
logger.info("Now listening on address %r, port %d,"
2160
" flowinfo %d, scope_id %d"
2161
% tcp_server.socket.getsockname())
3583
" flowinfo %d, scope_id %d",
3584
*tcp_server.socket.getsockname())
2163
logger.info("Now listening on address %r, port %d"
2164
% tcp_server.socket.getsockname())
2166
#service.interface = tcp_server.socket.getsockname()[3]
3586
logger.info("Now listening on address %r, port %d",
3587
*tcp_server.socket.getsockname())
3589
# service.interface = tcp_server.socket.getsockname()[3]
2169
# From the Avahi example code
2172
except dbus.exceptions.DBusException as error:
2173
logger.critical("DBusException: %s", error)
2176
# End of Avahi example code
2178
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2179
lambda *args, **kwargs:
2180
(tcp_server.handle_request
2181
(*args[2:], **kwargs) or True))
3593
# From the Avahi example code
3596
except dbus.exceptions.DBusException as error:
3597
logger.critical("D-Bus Exception", exc_info=error)
3600
# End of Avahi example code
3602
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3603
lambda *args, **kwargs:
3604
(tcp_server.handle_request
3605
(*args[2:], **kwargs) or True))
2183
3607
logger.debug("Starting main loop")
2184
3608
main_loop.run()
2185
3609
except AvahiError as error:
2186
logger.critical("AvahiError: %s", error)
3610
logger.critical("Avahi Error", exc_info=error)
2189
3613
except KeyboardInterrupt: