63
import cPickle as pickle
70
import cPickle as pickle
64
73
import multiprocessing
70
85
import dbus.service
87
from gi.repository import GLib
73
88
from dbus.mainloop.glib import DBusGMainLoop
76
91
import xml.dom.minidom
94
if sys.version_info.major == 2:
98
# Add collections.abc.Callable if it does not exist
100
collections.abc.Callable
101
except AttributeError:
103
Callable = collections.Callable
104
collections.abc = abc
107
# Add shlex.quote if it does not exist
110
except AttributeError:
111
shlex.quote = re.escape
113
# Show warnings by default
114
if not sys.warnoptions:
116
warnings.simplefilter("default")
118
# Try to find the value of SO_BINDTODEVICE:
120
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
121
# newer, and it is also the most natural place for it:
81
122
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
82
123
except AttributeError:
125
# This is where SO_BINDTODEVICE was up to and including Python
84
127
from IN import SO_BINDTODEVICE
85
128
except ImportError:
86
SO_BINDTODEVICE = None
129
# In Python 2.7 it seems to have been removed entirely.
130
# Try running the C preprocessor:
132
cc = subprocess.Popen(["cc", "--language=c", "-E",
134
stdin=subprocess.PIPE,
135
stdout=subprocess.PIPE)
136
stdout = cc.communicate(
137
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
138
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
139
except (OSError, ValueError, IndexError):
141
SO_BINDTODEVICE = None
143
if sys.version_info < (3, 2):
144
configparser.Configparser = configparser.SafeConfigParser
89
147
stored_state_file = "clients.pickle"
91
149
logger = logging.getLogger()
92
syslogger = (logging.handlers.SysLogHandler
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
94
address = str("/dev/log")))
150
logging.captureWarnings(True) # Show warnings via the logging system
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
154
if_nametoindex = ctypes.cdll.LoadLibrary(
155
ctypes.util.find_library("c")).if_nametoindex
100
156
except (OSError, AttributeError):
101
158
def if_nametoindex(interface):
102
159
"Get an interface index the hard way, i.e. using fcntl()"
103
160
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
161
with contextlib.closing(socket.socket()) as s:
105
162
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
108
interface_index = struct.unpack(str("I"),
163
struct.pack(b"16s16x", interface))
164
interface_index = struct.unpack("I", ifreq[16:20])[0]
110
165
return interface_index
113
def initlogger(level=logging.WARNING):
168
def copy_function(func):
169
"""Make a copy of a function"""
170
if sys.version_info.major == 2:
171
return types.FunctionType(func.func_code,
177
return types.FunctionType(func.__code__,
184
def initlogger(debug, level=logging.WARNING):
114
185
"""init logger and add loglevel"""
188
syslogger = (logging.handlers.SysLogHandler(
189
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
116
191
syslogger.setFormatter(logging.Formatter
117
192
('Mandos [%(process)d]: %(levelname)s:'
119
194
logger.addHandler(syslogger)
121
console = logging.StreamHandler()
122
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
126
logger.addHandler(console)
197
console = logging.StreamHandler()
198
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
202
logger.addHandler(console)
127
203
logger.setLevel(level)
166
255
os.rmdir(self.tempdir)
167
256
self.tempdir = None
169
258
def password_encode(self, password):
170
259
# Passphrase can not be empty and can not contain newlines or
171
260
# NUL bytes. So we prefix it and hex encode it.
172
return b"mandos" + binascii.hexlify(password)
261
encoded = b"mandos" + binascii.hexlify(password)
262
if len(encoded) > 2048:
263
# GnuPG can't handle long passwords, so encode differently
264
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
265
.replace(b"\n", b"\\n")
266
.replace(b"\0", b"\\x00"))
174
269
def encrypt(self, data, password):
175
self.gnupg.passphrase = self.password_encode(password)
176
with open(os.devnull) as devnull:
178
proc = self.gnupg.run(['--symmetric'],
179
create_fhs=['stdin', 'stdout'],
180
attach_fhs={'stderr': devnull})
181
with contextlib.closing(proc.handles['stdin']) as f:
183
with contextlib.closing(proc.handles['stdout']) as f:
184
ciphertext = f.read()
188
self.gnupg.passphrase = None
270
passphrase = self.password_encode(password)
271
with tempfile.NamedTemporaryFile(
272
dir=self.tempdir) as passfile:
273
passfile.write(passphrase)
275
proc = subprocess.Popen([self.gpg, '--symmetric',
279
stdin=subprocess.PIPE,
280
stdout=subprocess.PIPE,
281
stderr=subprocess.PIPE)
282
ciphertext, err = proc.communicate(input=data)
283
if proc.returncode != 0:
189
285
return ciphertext
191
287
def decrypt(self, data, password):
192
self.gnupg.passphrase = self.password_encode(password)
193
with open(os.devnull) as devnull:
195
proc = self.gnupg.run(['--decrypt'],
196
create_fhs=['stdin', 'stdout'],
197
attach_fhs={'stderr': devnull})
198
with contextlib.closing(proc.handles['stdin'] ) as f:
200
with contextlib.closing(proc.handles['stdout']) as f:
201
decrypted_plaintext = f.read()
205
self.gnupg.passphrase = None
288
passphrase = self.password_encode(password)
289
with tempfile.NamedTemporaryFile(
290
dir=self.tempdir) as passfile:
291
passfile.write(passphrase)
293
proc = subprocess.Popen([self.gpg, '--decrypt',
297
stdin=subprocess.PIPE,
298
stdout=subprocess.PIPE,
299
stderr=subprocess.PIPE)
300
decrypted_plaintext, err = proc.communicate(input=data)
301
if proc.returncode != 0:
206
303
return decrypted_plaintext
306
# Pretend that we have an Avahi module
308
"""This isn't so much a class as it is a module-like namespace."""
309
IF_UNSPEC = -1 # avahi-common/address.h
310
PROTO_UNSPEC = -1 # avahi-common/address.h
311
PROTO_INET = 0 # avahi-common/address.h
312
PROTO_INET6 = 1 # avahi-common/address.h
313
DBUS_NAME = "org.freedesktop.Avahi"
314
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
315
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
316
DBUS_PATH_SERVER = "/"
319
def string_array_to_txt_array(t):
320
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
321
for s in t), signature="ay")
322
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
323
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
324
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
325
SERVER_INVALID = 0 # avahi-common/defs.h
326
SERVER_REGISTERING = 1 # avahi-common/defs.h
327
SERVER_RUNNING = 2 # avahi-common/defs.h
328
SERVER_COLLISION = 3 # avahi-common/defs.h
329
SERVER_FAILURE = 4 # avahi-common/defs.h
210
332
class AvahiError(Exception):
211
333
def __init__(self, value, *args, **kwargs):
212
334
self.value = value
213
super(AvahiError, self).__init__(value, *args, **kwargs)
214
def __unicode__(self):
215
return unicode(repr(self.value))
335
return super(AvahiError, self).__init__(value, *args,
217
339
class AvahiServiceError(AvahiError):
220
343
class AvahiGroupError(AvahiError):
224
class AvahiService(object):
225
348
"""An Avahi (Zeroconf) service.
228
351
interface: integer; avahi.IF_UNSPEC or an interface index.
229
352
Used to optionally bind to the specified interface.
230
353
name: string; Example: 'Mandos'
231
354
type: string; Example: '_mandos._tcp'.
232
See <http://www.dns-sd.org/ServiceTypes.html>
355
See <https://www.iana.org/assignments/service-names-port-numbers>
233
356
port: integer; what port to announce
234
357
TXT: list of strings; TXT record for the service
235
358
domain: string; Domain to publish on, default to .local if empty.
364
517
follow_name_owner_changes=True),
365
518
avahi.DBUS_INTERFACE_SERVER)
366
519
self.server.connect_to_signal("StateChanged",
367
self.server_state_changed)
520
self.server_state_changed)
368
521
self.server_state_changed(self.server.GetState())
370
524
class AvahiServiceToSyslog(AvahiService):
525
def rename(self, *args, **kwargs):
372
526
"""Add the new name to the syslog messages"""
373
ret = AvahiService.rename(self)
374
syslogger.setFormatter(logging.Formatter
375
('Mandos (%s) [%%(process)d]:'
376
' %%(levelname)s: %%(message)s'
527
ret = super(AvahiServiceToSyslog, self).rename(*args,
529
syslogger.setFormatter(logging.Formatter(
530
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
380
def timedelta_to_milliseconds(td):
381
"Convert a datetime.timedelta() to milliseconds"
382
return ((td.days * 24 * 60 * 60 * 1000)
383
+ (td.seconds * 1000)
384
+ (td.microseconds // 1000))
386
class Client(object):
535
# Pretend that we have a GnuTLS module
537
"""This isn't so much a class as it is a module-like namespace."""
539
library = ctypes.util.find_library("gnutls")
541
library = ctypes.util.find_library("gnutls-deb0")
542
_library = ctypes.cdll.LoadLibrary(library)
545
# Unless otherwise indicated, the constants and types below are
546
# all from the gnutls/gnutls.h C header file.
557
E_NO_CERTIFICATE_FOUND = -49
562
KEYID_USE_SHA256 = 1 # gnutls/x509.h
563
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
566
class session_int(ctypes.Structure):
568
session_t = ctypes.POINTER(session_int)
570
class certificate_credentials_st(ctypes.Structure):
572
certificate_credentials_t = ctypes.POINTER(
573
certificate_credentials_st)
574
certificate_type_t = ctypes.c_int
576
class datum_t(ctypes.Structure):
577
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
578
('size', ctypes.c_uint)]
580
class openpgp_crt_int(ctypes.Structure):
582
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
583
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
584
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
585
credentials_type_t = ctypes.c_int
586
transport_ptr_t = ctypes.c_void_p
587
close_request_t = ctypes.c_int
590
class Error(Exception):
591
def __init__(self, message=None, code=None, args=()):
592
# Default usage is by a message string, but if a return
593
# code is passed, convert it to a string with
596
if message is None and code is not None:
597
message = gnutls.strerror(code)
598
return super(gnutls.Error, self).__init__(
601
class CertificateSecurityError(Error):
607
self._c_object = gnutls.certificate_credentials_t()
608
gnutls.certificate_allocate_credentials(
609
ctypes.byref(self._c_object))
610
self.type = gnutls.CRD_CERTIFICATE
613
gnutls.certificate_free_credentials(self._c_object)
616
def __init__(self, socket, credentials=None):
617
self._c_object = gnutls.session_t()
618
gnutls_flags = gnutls.CLIENT
619
if gnutls.check_version(b"3.5.6"):
620
gnutls_flags |= gnutls.NO_TICKETS
622
gnutls_flags |= gnutls.ENABLE_RAWPK
623
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
625
gnutls.set_default_priority(self._c_object)
626
gnutls.transport_set_ptr(self._c_object, socket.fileno())
627
gnutls.handshake_set_private_extensions(self._c_object,
630
if credentials is None:
631
credentials = gnutls.Credentials()
632
gnutls.credentials_set(self._c_object, credentials.type,
633
ctypes.cast(credentials._c_object,
635
self.credentials = credentials
638
gnutls.deinit(self._c_object)
641
return gnutls.handshake(self._c_object)
643
def send(self, data):
647
data_len -= gnutls.record_send(self._c_object,
652
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
654
# Error handling functions
655
def _error_code(result):
656
"""A function to raise exceptions on errors, suitable
657
for the 'restype' attribute on ctypes functions"""
660
if result == gnutls.E_NO_CERTIFICATE_FOUND:
661
raise gnutls.CertificateSecurityError(code=result)
662
raise gnutls.Error(code=result)
664
def _retry_on_error(result, func, arguments):
665
"""A function to retry on some errors, suitable
666
for the 'errcheck' attribute on ctypes functions"""
668
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
669
return _error_code(result)
670
result = func(*arguments)
673
# Unless otherwise indicated, the function declarations below are
674
# all from the gnutls/gnutls.h C header file.
677
priority_set_direct = _library.gnutls_priority_set_direct
678
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
679
ctypes.POINTER(ctypes.c_char_p)]
680
priority_set_direct.restype = _error_code
682
init = _library.gnutls_init
683
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
684
init.restype = _error_code
686
set_default_priority = _library.gnutls_set_default_priority
687
set_default_priority.argtypes = [session_t]
688
set_default_priority.restype = _error_code
690
record_send = _library.gnutls_record_send
691
record_send.argtypes = [session_t, ctypes.c_void_p,
693
record_send.restype = ctypes.c_ssize_t
694
record_send.errcheck = _retry_on_error
696
certificate_allocate_credentials = (
697
_library.gnutls_certificate_allocate_credentials)
698
certificate_allocate_credentials.argtypes = [
699
ctypes.POINTER(certificate_credentials_t)]
700
certificate_allocate_credentials.restype = _error_code
702
certificate_free_credentials = (
703
_library.gnutls_certificate_free_credentials)
704
certificate_free_credentials.argtypes = [
705
certificate_credentials_t]
706
certificate_free_credentials.restype = None
708
handshake_set_private_extensions = (
709
_library.gnutls_handshake_set_private_extensions)
710
handshake_set_private_extensions.argtypes = [session_t,
712
handshake_set_private_extensions.restype = None
714
credentials_set = _library.gnutls_credentials_set
715
credentials_set.argtypes = [session_t, credentials_type_t,
717
credentials_set.restype = _error_code
719
strerror = _library.gnutls_strerror
720
strerror.argtypes = [ctypes.c_int]
721
strerror.restype = ctypes.c_char_p
723
certificate_type_get = _library.gnutls_certificate_type_get
724
certificate_type_get.argtypes = [session_t]
725
certificate_type_get.restype = _error_code
727
certificate_get_peers = _library.gnutls_certificate_get_peers
728
certificate_get_peers.argtypes = [session_t,
729
ctypes.POINTER(ctypes.c_uint)]
730
certificate_get_peers.restype = ctypes.POINTER(datum_t)
732
global_set_log_level = _library.gnutls_global_set_log_level
733
global_set_log_level.argtypes = [ctypes.c_int]
734
global_set_log_level.restype = None
736
global_set_log_function = _library.gnutls_global_set_log_function
737
global_set_log_function.argtypes = [log_func]
738
global_set_log_function.restype = None
740
deinit = _library.gnutls_deinit
741
deinit.argtypes = [session_t]
742
deinit.restype = None
744
handshake = _library.gnutls_handshake
745
handshake.argtypes = [session_t]
746
handshake.restype = _error_code
747
handshake.errcheck = _retry_on_error
749
transport_set_ptr = _library.gnutls_transport_set_ptr
750
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
751
transport_set_ptr.restype = None
753
bye = _library.gnutls_bye
754
bye.argtypes = [session_t, close_request_t]
755
bye.restype = _error_code
756
bye.errcheck = _retry_on_error
758
check_version = _library.gnutls_check_version
759
check_version.argtypes = [ctypes.c_char_p]
760
check_version.restype = ctypes.c_char_p
762
_need_version = b"3.3.0"
763
if check_version(_need_version) is None:
764
raise self.Error("Needs GnuTLS {} or later"
765
.format(_need_version))
767
_tls_rawpk_version = b"3.6.6"
768
has_rawpk = bool(check_version(_tls_rawpk_version))
772
class pubkey_st(ctypes.Structure):
774
pubkey_t = ctypes.POINTER(pubkey_st)
776
x509_crt_fmt_t = ctypes.c_int
778
# All the function declarations below are from
780
pubkey_init = _library.gnutls_pubkey_init
781
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
782
pubkey_init.restype = _error_code
784
pubkey_import = _library.gnutls_pubkey_import
785
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
787
pubkey_import.restype = _error_code
789
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
790
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
791
ctypes.POINTER(ctypes.c_ubyte),
792
ctypes.POINTER(ctypes.c_size_t)]
793
pubkey_get_key_id.restype = _error_code
795
pubkey_deinit = _library.gnutls_pubkey_deinit
796
pubkey_deinit.argtypes = [pubkey_t]
797
pubkey_deinit.restype = None
799
# All the function declarations below are from
802
openpgp_crt_init = _library.gnutls_openpgp_crt_init
803
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
804
openpgp_crt_init.restype = _error_code
806
openpgp_crt_import = _library.gnutls_openpgp_crt_import
807
openpgp_crt_import.argtypes = [openpgp_crt_t,
808
ctypes.POINTER(datum_t),
810
openpgp_crt_import.restype = _error_code
812
openpgp_crt_verify_self = \
813
_library.gnutls_openpgp_crt_verify_self
814
openpgp_crt_verify_self.argtypes = [
817
ctypes.POINTER(ctypes.c_uint),
819
openpgp_crt_verify_self.restype = _error_code
821
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
822
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
823
openpgp_crt_deinit.restype = None
825
openpgp_crt_get_fingerprint = (
826
_library.gnutls_openpgp_crt_get_fingerprint)
827
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
831
openpgp_crt_get_fingerprint.restype = _error_code
833
if check_version(b"3.6.4"):
834
certificate_type_get2 = _library.gnutls_certificate_type_get2
835
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
836
certificate_type_get2.restype = _error_code
838
# Remove non-public functions
839
del _error_code, _retry_on_error
842
def call_pipe(connection, # : multiprocessing.Connection
843
func, *args, **kwargs):
844
"""This function is meant to be called by multiprocessing.Process
846
This function runs func(*args, **kwargs), and writes the resulting
847
return value on the provided multiprocessing.Connection.
849
connection.send(func(*args, **kwargs))
387
854
"""A representation of a client host served by this server.
390
857
approved: bool(); 'None' if not yet approved/disapproved
391
858
approval_delay: datetime.timedelta(); Time to wait for approval
392
859
approval_duration: datetime.timedelta(); Duration of one approval
393
checker: subprocess.Popen(); a running checker process used
394
to see if the client lives.
395
'None' if no process is running.
396
checker_callback_tag: a gobject event source tag, or None
860
checker: multiprocessing.Process(); a running checker process used
861
to see if the client lives. 'None' if no process is
863
checker_callback_tag: a GLib event source tag, or None
397
864
checker_command: string; External command which is run to check
398
865
if client lives. %() expansions are done at
399
866
runtime with vars(self) as dict, so that for
400
867
instance %(name)s can be used in the command.
401
checker_initiator_tag: a gobject event source tag, or None
868
checker_initiator_tag: a GLib event source tag, or None
402
869
created: datetime.datetime(); (UTC) object creation
403
870
client_structure: Object describing what attributes a client has
404
871
and is used for storing the client at exit
405
872
current_checker_command: string; current running checker_command
406
disable_initiator_tag: a gobject event source tag, or None
873
disable_initiator_tag: a GLib event source tag, or None
408
875
fingerprint: string (40 or 32 hexadecimal digits); used to
409
uniquely identify the client
876
uniquely identify an OpenPGP client
877
key_id: string (64 hexadecimal digits); used to uniquely identify
878
a client using raw public keys
410
879
host: string; available for use by the checker command
411
880
interval: datetime.timedelta(); How often to start a new checker
412
881
last_approval_request: datetime.datetime(); (UTC) or None
413
882
last_checked_ok: datetime.datetime(); (UTC) or None
415
883
last_checker_status: integer between 0 and 255 reflecting exit
416
884
status of last checker. -1 reflects crashed
885
checker, -2 means no checker completed yet.
886
last_checker_signal: The signal which killed the last checker, if
887
last_checker_status is -1
418
888
last_enabled: datetime.datetime(); (UTC) or None
419
889
name: string; from the config file, used in log messages and
420
890
D-Bus identifiers
421
891
secret: bytestring; sent verbatim (over TLS) to client
422
892
timeout: datetime.timedelta(); How long from last_checked_ok
423
893
until this client is disabled
424
extended_timeout: extra long timeout when password has been sent
894
extended_timeout: extra long timeout when secret has been sent
425
895
runtime_expansions: Allowed attributes for runtime expansion.
426
896
expires: datetime.datetime(); time (UTC) when a client will be
427
897
disabled, or None
898
server_settings: The server_settings dict from main()
430
901
runtime_expansions = ("approval_delay", "approval_duration",
431
"created", "enabled", "fingerprint",
432
"host", "interval", "last_checked_ok",
902
"created", "enabled", "expires", "key_id",
903
"fingerprint", "host", "interval",
904
"last_approval_request", "last_checked_ok",
433
905
"last_enabled", "name", "timeout")
434
client_defaults = { "timeout": "5m",
435
"extended_timeout": "15m",
437
"checker": "fping -q -- %%(host)s",
439
"approval_delay": "0s",
440
"approval_duration": "1s",
441
"approved_by_default": "True",
445
def timeout_milliseconds(self):
446
"Return the 'timeout' attribute in milliseconds"
447
return timedelta_to_milliseconds(self.timeout)
449
def extended_timeout_milliseconds(self):
450
"Return the 'extended_timeout' attribute in milliseconds"
451
return timedelta_to_milliseconds(self.extended_timeout)
453
def interval_milliseconds(self):
454
"Return the 'interval' attribute in milliseconds"
455
return timedelta_to_milliseconds(self.interval)
457
def approval_delay_milliseconds(self):
458
return timedelta_to_milliseconds(self.approval_delay)
908
"extended_timeout": "PT15M",
910
"checker": "fping -q -- %%(host)s",
912
"approval_delay": "PT0S",
913
"approval_duration": "PT1S",
914
"approved_by_default": "True",
461
919
def config_parser(config):
462
""" Construct a new dict of client settings of this form:
920
"""Construct a new dict of client settings of this form:
463
921
{ client_name: {setting_name: value, ...}, ...}
464
with exceptions for any special settings as defined above"""
922
with exceptions for any special settings as defined above.
923
NOTE: Must be a pure function. Must return the same result
924
value given the same arguments.
466
927
for client_name in config.sections():
467
928
section = dict(config.items(client_name))
468
929
client = settings[client_name] = {}
470
931
client["host"] = section["host"]
471
932
# Reformat values from string types to Python types
472
933
client["approved_by_default"] = config.getboolean(
473
934
client_name, "approved_by_default")
474
client["enabled"] = config.getboolean(client_name, "enabled")
935
client["enabled"] = config.getboolean(client_name,
938
# Uppercase and remove spaces from key_id and fingerprint
939
# for later comparison purposes with return value from the
940
# key_id() and fingerprint() functions
941
client["key_id"] = (section.get("key_id", "").upper()
476
943
client["fingerprint"] = (section["fingerprint"].upper()
477
944
.replace(" ", ""))
478
945
if "secret" in section:
479
client["secret"] = section["secret"].decode("base64")
946
client["secret"] = codecs.decode(section["secret"]
480
949
elif "secfile" in section:
481
950
with open(os.path.expanduser(os.path.expandvars
482
951
(section["secfile"])),
483
952
"rb") as secfile:
484
953
client["secret"] = secfile.read()
486
raise TypeError("No secret or secfile for section %s"
955
raise TypeError("No secret or secfile for section {}"
488
957
client["timeout"] = string_to_delta(section["timeout"])
489
958
client["extended_timeout"] = string_to_delta(
490
959
section["extended_timeout"])
532
1002
self.current_checker_command = None
533
1003
self.approved = None
534
1004
self.approvals_pending = 0
535
self.changedstate = (multiprocessing_manager
536
.Condition(multiprocessing_manager
538
self.client_structure = [attr for attr in
539
self.__dict__.iterkeys()
1005
self.changedstate = multiprocessing_manager.Condition(
1006
multiprocessing_manager.Lock())
1007
self.client_structure = [attr
1008
for attr in self.__dict__.keys()
540
1009
if not attr.startswith("_")]
541
1010
self.client_structure.append("client_structure")
543
for name, t in inspect.getmembers(type(self),
1012
for name, t in inspect.getmembers(
1013
type(self), lambda obj: isinstance(obj, property)):
547
1014
if not name.startswith("_"):
548
1015
self.client_structure.append(name)
550
1017
# Send notice to process children that client state has changed
551
1018
def send_changedstate(self):
552
1019
with self.changedstate:
553
1020
self.changedstate.notify_all()
555
1022
def enable(self):
556
1023
"""Start this client's checker and timeout hooks"""
557
1024
if getattr(self, "enabled", False):
558
1025
# Already enabled
560
self.send_changedstate()
561
1027
self.expires = datetime.datetime.utcnow() + self.timeout
562
1028
self.enabled = True
563
1029
self.last_enabled = datetime.datetime.utcnow()
564
1030
self.init_checker()
1031
self.send_changedstate()
566
1033
def disable(self, quiet=True):
567
1034
"""Disable this client."""
568
1035
if not getattr(self, "enabled", False):
571
self.send_changedstate()
573
1038
logger.info("Disabling client %s", self.name)
574
if getattr(self, "disable_initiator_tag", False):
575
gobject.source_remove(self.disable_initiator_tag)
1039
if getattr(self, "disable_initiator_tag", None) is not None:
1040
GLib.source_remove(self.disable_initiator_tag)
576
1041
self.disable_initiator_tag = None
577
1042
self.expires = None
578
if getattr(self, "checker_initiator_tag", False):
579
gobject.source_remove(self.checker_initiator_tag)
1043
if getattr(self, "checker_initiator_tag", None) is not None:
1044
GLib.source_remove(self.checker_initiator_tag)
580
1045
self.checker_initiator_tag = None
581
1046
self.stop_checker()
582
1047
self.enabled = False
583
# Do not run this again if called by a gobject.timeout_add
1049
self.send_changedstate()
1050
# Do not run this again if called by a GLib.timeout_add
586
1053
def __del__(self):
589
1056
def init_checker(self):
590
1057
# Schedule a new checker to be started an 'interval' from now,
591
1058
# and every interval from then on.
592
self.checker_initiator_tag = (gobject.timeout_add
593
(self.interval_milliseconds(),
1059
if self.checker_initiator_tag is not None:
1060
GLib.source_remove(self.checker_initiator_tag)
1061
self.checker_initiator_tag = GLib.timeout_add(
1062
random.randrange(int(self.interval.total_seconds() * 1000
595
1065
# Schedule a disable() when 'timeout' has passed
596
self.disable_initiator_tag = (gobject.timeout_add
597
(self.timeout_milliseconds(),
1066
if self.disable_initiator_tag is not None:
1067
GLib.source_remove(self.disable_initiator_tag)
1068
self.disable_initiator_tag = GLib.timeout_add(
1069
int(self.timeout.total_seconds() * 1000), self.disable)
599
1070
# Also start a new checker *right now*.
600
1071
self.start_checker()
602
def checker_callback(self, pid, condition, command):
1073
def checker_callback(self, source, condition, connection,
603
1075
"""The checker has completed, so take appropriate actions."""
1076
# Read return code from connection (see call_pipe)
1077
returncode = connection.recv()
1079
if self.checker is not None:
604
1081
self.checker_callback_tag = None
605
1082
self.checker = None
606
if os.WIFEXITED(condition):
607
self.last_checker_status = os.WEXITSTATUS(condition)
1085
self.last_checker_status = returncode
1086
self.last_checker_signal = None
608
1087
if self.last_checker_status == 0:
609
1088
logger.info("Checker for %(name)s succeeded",
611
1090
self.checked_ok()
613
logger.info("Checker for %(name)s failed",
1092
logger.info("Checker for %(name)s failed", vars(self))
616
1094
self.last_checker_status = -1
1095
self.last_checker_signal = -returncode
617
1096
logger.warning("Checker for %(name)s crashed?",
620
def checked_ok(self, timeout=None):
621
"""Bump up the timeout for this client.
623
This should only be called when the client has been seen,
1100
def checked_ok(self):
1101
"""Assert that the client has been seen, alive and well."""
1102
self.last_checked_ok = datetime.datetime.utcnow()
1103
self.last_checker_status = 0
1104
self.last_checker_signal = None
1107
def bump_timeout(self, timeout=None):
1108
"""Bump up the timeout for this client."""
626
1109
if timeout is None:
627
1110
timeout = self.timeout
628
self.last_checked_ok = datetime.datetime.utcnow()
629
1111
if self.disable_initiator_tag is not None:
630
gobject.source_remove(self.disable_initiator_tag)
1112
GLib.source_remove(self.disable_initiator_tag)
1113
self.disable_initiator_tag = None
631
1114
if getattr(self, "enabled", False):
632
self.disable_initiator_tag = (gobject.timeout_add
633
(timedelta_to_milliseconds
634
(timeout), self.disable))
1115
self.disable_initiator_tag = GLib.timeout_add(
1116
int(timeout.total_seconds() * 1000), self.disable)
635
1117
self.expires = datetime.datetime.utcnow() + timeout
637
1119
def need_approval(self):
638
1120
self.last_approval_request = datetime.datetime.utcnow()
640
1122
def start_checker(self):
641
1123
"""Start a new checker subprocess if one is not running.
643
1125
If a checker already exists, leave it running and do
645
1127
# The reason for not killing a running checker is that if we
646
# did that, then if a checker (for some reason) started
647
# running slowly and taking more than 'interval' time, the
648
# client would inevitably timeout, since no checker would get
649
# a chance to run to completion. If we instead leave running
1128
# did that, and if a checker (for some reason) started running
1129
# slowly and taking more than 'interval' time, then the client
1130
# would inevitably timeout, since no checker would get a
1131
# chance to run to completion. If we instead leave running
650
1132
# checkers alone, the checker would have to take more time
651
1133
# than 'timeout' for the client to be disabled, which is as it
654
# If a checker exists, make sure it is not a zombie
656
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
657
except (AttributeError, OSError) as error:
658
if (isinstance(error, OSError)
659
and error.errno != errno.ECHILD):
663
logger.warning("Checker was a zombie")
664
gobject.source_remove(self.checker_callback_tag)
665
self.checker_callback(pid, status,
666
self.current_checker_command)
1136
if self.checker is not None and not self.checker.is_alive():
1137
logger.warning("Checker was not alive; joining")
667
1140
# Start a new checker if needed
668
1141
if self.checker is None:
1142
# Escape attributes for the shell
1144
attr: shlex.quote(str(getattr(self, attr)))
1145
for attr in self.runtime_expansions}
670
# In case checker_command has exactly one % operator
671
command = self.checker_command % self.host
673
# Escape attributes for the shell
674
escaped_attrs = dict(
676
re.escape(unicode(str(getattr(self, attr, "")),
680
self.runtime_expansions)
683
command = self.checker_command % escaped_attrs
684
except TypeError as error:
685
logger.error('Could not format string "%s":'
686
' %s', self.checker_command, error)
687
return True # Try again later
1147
command = self.checker_command % escaped_attrs
1148
except TypeError as error:
1149
logger.error('Could not format string "%s"',
1150
self.checker_command,
1152
return True # Try again later
688
1153
self.current_checker_command = command
690
logger.info("Starting checker %r for %s",
692
# We don't need to redirect stdout and stderr, since
693
# in normal mode, that is already done by daemon(),
694
# and in debug mode we don't want to. (Stdin is
695
# always replaced by /dev/null.)
696
self.checker = subprocess.Popen(command,
699
self.checker_callback_tag = (gobject.child_watch_add
701
self.checker_callback,
703
# The checker may have completed before the gobject
704
# watch was added. Check for this.
705
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
707
gobject.source_remove(self.checker_callback_tag)
708
self.checker_callback(pid, status, command)
709
except OSError as error:
710
logger.error("Failed to start subprocess: %s",
712
# Re-run this periodically if run by gobject.timeout_add
1154
logger.info("Starting checker %r for %s", command,
1156
# We don't need to redirect stdout and stderr, since
1157
# in normal mode, that is already done by daemon(),
1158
# and in debug mode we don't want to. (Stdin is
1159
# always replaced by /dev/null.)
1160
# The exception is when not debugging but nevertheless
1161
# running in the foreground; use the previously
1163
popen_args = {"close_fds": True,
1166
if (not self.server_settings["debug"]
1167
and self.server_settings["foreground"]):
1168
popen_args.update({"stdout": wnull,
1170
pipe = multiprocessing.Pipe(duplex=False)
1171
self.checker = multiprocessing.Process(
1173
args=(pipe[1], subprocess.call, command),
1175
self.checker.start()
1176
self.checker_callback_tag = GLib.io_add_watch(
1177
GLib.IOChannel.unix_new(pipe[0].fileno()),
1178
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
1179
self.checker_callback, pipe[0], command)
1180
# Re-run this periodically if run by GLib.timeout_add
715
1183
def stop_checker(self):
716
1184
"""Force the checker process, if any, to stop."""
717
1185
if self.checker_callback_tag:
718
gobject.source_remove(self.checker_callback_tag)
1186
GLib.source_remove(self.checker_callback_tag)
719
1187
self.checker_callback_tag = None
720
1188
if getattr(self, "checker", None) is None:
722
1190
logger.debug("Stopping checker for %(name)s", vars(self))
724
os.kill(self.checker.pid, signal.SIGTERM)
726
#if self.checker.poll() is None:
727
# os.kill(self.checker.pid, signal.SIGKILL)
728
except OSError as error:
729
if error.errno != errno.ESRCH: # No such process
1191
self.checker.terminate()
731
1192
self.checker = None
734
def dbus_service_property(dbus_interface, signature="v",
735
access="readwrite", byte_arrays=False):
1195
def dbus_service_property(dbus_interface,
736
1199
"""Decorators for marking methods of a DBusObjectWithProperties to
737
1200
become properties on the D-Bus.
739
1202
The decorated method will be called with no arguments by "Get"
740
1203
and with one argument by "Set".
742
1205
The parameters, where they are supported, are the same as
743
1206
dbus.service.method, except there is only "signature", since the
744
1207
type from Get() and the type sent to Set() is the same.
783
class DBusObjectWithProperties(dbus.service.Object):
1290
class DBusObjectWithAnnotations(dbus.service.Object):
1291
"""A D-Bus object with annotations.
1293
Classes inheriting from this can use the dbus_annotations
1294
decorator to add annotations to methods or signals.
1298
def _is_dbus_thing(thing):
1299
"""Returns a function testing if an attribute is a D-Bus thing
1301
If called like _is_dbus_thing("method") it returns a function
1302
suitable for use as predicate to inspect.getmembers().
1304
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1307
def _get_all_dbus_things(self, thing):
1308
"""Returns a generator of (name, attribute) pairs
1310
return ((getattr(athing.__get__(self), "_dbus_name", name),
1311
athing.__get__(self))
1312
for cls in self.__class__.__mro__
1314
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1316
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1318
path_keyword='object_path',
1319
connection_keyword='connection')
1320
def Introspect(self, object_path, connection):
1321
"""Overloading of standard D-Bus method.
1323
Inserts annotation tags on methods and signals.
1325
xmlstring = dbus.service.Object.Introspect(self, object_path,
1328
document = xml.dom.minidom.parseString(xmlstring)
1330
for if_tag in document.getElementsByTagName("interface"):
1331
# Add annotation tags
1332
for typ in ("method", "signal"):
1333
for tag in if_tag.getElementsByTagName(typ):
1335
for name, prop in (self.
1336
_get_all_dbus_things(typ)):
1337
if (name == tag.getAttribute("name")
1338
and prop._dbus_interface
1339
== if_tag.getAttribute("name")):
1340
annots.update(getattr(
1341
prop, "_dbus_annotations", {}))
1342
for name, value in annots.items():
1343
ann_tag = document.createElement(
1345
ann_tag.setAttribute("name", name)
1346
ann_tag.setAttribute("value", value)
1347
tag.appendChild(ann_tag)
1348
# Add interface annotation tags
1349
for annotation, value in dict(
1350
itertools.chain.from_iterable(
1351
annotations().items()
1352
for name, annotations
1353
in self._get_all_dbus_things("interface")
1354
if name == if_tag.getAttribute("name")
1356
ann_tag = document.createElement("annotation")
1357
ann_tag.setAttribute("name", annotation)
1358
ann_tag.setAttribute("value", value)
1359
if_tag.appendChild(ann_tag)
1360
# Fix argument name for the Introspect method itself
1361
if (if_tag.getAttribute("name")
1362
== dbus.INTROSPECTABLE_IFACE):
1363
for cn in if_tag.getElementsByTagName("method"):
1364
if cn.getAttribute("name") == "Introspect":
1365
for arg in cn.getElementsByTagName("arg"):
1366
if (arg.getAttribute("direction")
1368
arg.setAttribute("name",
1370
xmlstring = document.toxml("utf-8")
1372
except (AttributeError, xml.dom.DOMException,
1373
xml.parsers.expat.ExpatError) as error:
1374
logger.error("Failed to override Introspection method",
1379
class DBusObjectWithProperties(DBusObjectWithAnnotations):
784
1380
"""A D-Bus object with properties.
786
1382
Classes inheriting from this can use the dbus_service_property
787
1383
decorator to expose methods as D-Bus properties. It exposes the
788
1384
standard Get(), Set(), and GetAll() methods on the D-Bus.
792
def _is_dbus_property(obj):
793
return getattr(obj, "_dbus_is_property", False)
795
def _get_all_dbus_properties(self):
796
"""Returns a generator of (name, attribute) pairs
798
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
799
for cls in self.__class__.__mro__
801
inspect.getmembers(cls, self._is_dbus_property))
803
1387
def _get_dbus_property(self, interface_name, property_name):
804
1388
"""Returns a bound method if one exists which is a D-Bus
805
1389
property with the specified name and interface.
807
for cls in self.__class__.__mro__:
808
for name, value in (inspect.getmembers
809
(cls, self._is_dbus_property)):
1391
for cls in self.__class__.__mro__:
1392
for name, value in inspect.getmembers(
1393
cls, self._is_dbus_thing("property")):
810
1394
if (value._dbus_name == property_name
811
1395
and value._dbus_interface == interface_name):
812
1396
return value.__get__(self)
814
1398
# No such property
815
raise DBusPropertyNotFound(self.dbus_object_path + ":"
816
+ interface_name + "."
819
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1399
raise DBusPropertyNotFound("{}:{}.{}".format(
1400
self.dbus_object_path, interface_name, property_name))
1403
def _get_all_interface_names(cls):
1404
"""Get a sequence of all interfaces supported by an object"""
1405
return (name for name in set(getattr(getattr(x, attr),
1406
"_dbus_interface", None)
1407
for x in (inspect.getmro(cls))
1409
if name is not None)
1411
@dbus.service.method(dbus.PROPERTIES_IFACE,
820
1413
out_signature="v")
821
1414
def Get(self, interface_name, property_name):
822
1415
"""Standard D-Bus property Get() method, see D-Bus standard.
914
1539
except (AttributeError, xml.dom.DOMException,
915
1540
xml.parsers.expat.ExpatError) as error:
916
1541
logger.error("Failed to override Introspection method",
921
def datetime_to_dbus (dt, variant_level=0):
1547
dbus.OBJECT_MANAGER_IFACE
1548
except AttributeError:
1549
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1552
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1553
"""A D-Bus object with an ObjectManager.
1555
Classes inheriting from this exposes the standard
1556
GetManagedObjects call and the InterfacesAdded and
1557
InterfacesRemoved signals on the standard
1558
"org.freedesktop.DBus.ObjectManager" interface.
1560
Note: No signals are sent automatically; they must be sent
1563
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1564
out_signature="a{oa{sa{sv}}}")
1565
def GetManagedObjects(self):
1566
"""This function must be overridden"""
1567
raise NotImplementedError()
1569
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1570
signature="oa{sa{sv}}")
1571
def InterfacesAdded(self, object_path, interfaces_and_properties):
1574
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1575
def InterfacesRemoved(self, object_path, interfaces):
1578
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1580
path_keyword='object_path',
1581
connection_keyword='connection')
1582
def Introspect(self, object_path, connection):
1583
"""Overloading of standard D-Bus method.
1585
Override return argument name of GetManagedObjects to be
1586
"objpath_interfaces_and_properties"
1588
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1592
document = xml.dom.minidom.parseString(xmlstring)
1594
for if_tag in document.getElementsByTagName("interface"):
1595
# Fix argument name for the GetManagedObjects method
1596
if (if_tag.getAttribute("name")
1597
== dbus.OBJECT_MANAGER_IFACE):
1598
for cn in if_tag.getElementsByTagName("method"):
1599
if (cn.getAttribute("name")
1600
== "GetManagedObjects"):
1601
for arg in cn.getElementsByTagName("arg"):
1602
if (arg.getAttribute("direction")
1606
"objpath_interfaces"
1608
xmlstring = document.toxml("utf-8")
1610
except (AttributeError, xml.dom.DOMException,
1611
xml.parsers.expat.ExpatError) as error:
1612
logger.error("Failed to override Introspection method",
1617
def datetime_to_dbus(dt, variant_level=0):
922
1618
"""Convert a UTC datetime.datetime() to a D-Bus type."""
924
return dbus.String("", variant_level = variant_level)
925
return dbus.String(dt.isoformat(),
926
variant_level=variant_level)
929
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
931
"""Applied to an empty subclass of a D-Bus object, this metaclass
932
will add additional D-Bus attributes matching a certain pattern.
1620
return dbus.String("", variant_level=variant_level)
1621
return dbus.String(dt.isoformat(), variant_level=variant_level)
1624
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1625
"""A class decorator; applied to a subclass of
1626
dbus.service.Object, it will add alternate D-Bus attributes with
1627
interface names according to the "alt_interface_names" mapping.
1630
@alternate_dbus_interfaces({"org.example.Interface":
1631
"net.example.AlternateInterface"})
1632
class SampleDBusObject(dbus.service.Object):
1633
@dbus.service.method("org.example.Interface")
1634
def SampleDBusMethod():
1637
The above "SampleDBusMethod" on "SampleDBusObject" will be
1638
reachable via two interfaces: "org.example.Interface" and
1639
"net.example.AlternateInterface", the latter of which will have
1640
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1641
"true", unless "deprecate" is passed with a False value.
1643
This works for methods and signals, and also for D-Bus properties
1644
(from DBusObjectWithProperties) and interfaces (from the
1645
dbus_interface_annotations decorator).
934
def __new__(mcs, name, bases, attr):
935
# Go through all the base classes which could have D-Bus
936
# methods, signals, or properties in them
937
for base in (b for b in bases
938
if issubclass(b, dbus.service.Object)):
939
# Go though all attributes of the base class
940
for attrname, attribute in inspect.getmembers(base):
1649
for orig_interface_name, alt_interface_name in (
1650
alt_interface_names.items()):
1652
interface_names = set()
1653
# Go though all attributes of the class
1654
for attrname, attribute in inspect.getmembers(cls):
941
1655
# Ignore non-D-Bus attributes, and D-Bus attributes
942
1656
# with the wrong interface name
943
1657
if (not hasattr(attribute, "_dbus_interface")
944
or not attribute._dbus_interface
945
.startswith("se.recompile.Mandos")):
1658
or not attribute._dbus_interface.startswith(
1659
orig_interface_name)):
947
1661
# Create an alternate D-Bus interface name based on
948
1662
# the current name
949
alt_interface = (attribute._dbus_interface
950
.replace("se.recompile.Mandos",
951
"se.bsnet.fukt.Mandos"))
1663
alt_interface = attribute._dbus_interface.replace(
1664
orig_interface_name, alt_interface_name)
1665
interface_names.add(alt_interface)
952
1666
# Is this a D-Bus signal?
953
1667
if getattr(attribute, "_dbus_is_signal", False):
954
# Extract the original non-method function by
956
nonmethod_func = (dict(
1668
# Extract the original non-method undecorated
1669
# function by black magic
1670
if sys.version_info.major == 2:
1671
nonmethod_func = (dict(
957
1672
zip(attribute.func_code.co_freevars,
958
attribute.__closure__))["func"]
1673
attribute.__closure__))
1674
["func"].cell_contents)
1676
nonmethod_func = (dict(
1677
zip(attribute.__code__.co_freevars,
1678
attribute.__closure__))
1679
["func"].cell_contents)
960
1680
# Create a new, but exactly alike, function
961
1681
# object, and decorate it to be a new D-Bus signal
962
1682
# with the alternate D-Bus interface name
963
new_function = (dbus.service.signal
965
attribute._dbus_signature)
967
nonmethod_func.func_code,
968
nonmethod_func.func_globals,
969
nonmethod_func.func_name,
970
nonmethod_func.func_defaults,
971
nonmethod_func.func_closure)))
1683
new_function = copy_function(nonmethod_func)
1684
new_function = (dbus.service.signal(
1686
attribute._dbus_signature)(new_function))
1687
# Copy annotations, if any
1689
new_function._dbus_annotations = dict(
1690
attribute._dbus_annotations)
1691
except AttributeError:
972
1694
# Define a creator of a function to call both the
973
# old and new functions, so both the old and new
974
# signals gets sent when the function is called
1695
# original and alternate functions, so both the
1696
# original and alternate signals gets sent when
1697
# the function is called
975
1698
def fixscope(func1, func2):
976
1699
"""This function is a scope container to pass
977
1700
func1 and func2 to the "call_both" function
978
1701
outside of its arguments"""
1703
@functools.wraps(func2)
979
1704
def call_both(*args, **kwargs):
980
1705
"""This function will emit two D-Bus
981
1706
signals by calling func1 and func2"""
982
1707
func1(*args, **kwargs)
983
1708
func2(*args, **kwargs)
1709
# Make wrapper function look like a D-Bus
1711
for name, attr in inspect.getmembers(func2):
1712
if name.startswith("_dbus_"):
1713
setattr(call_both, name, attr)
984
1715
return call_both
985
1716
# Create the "call_both" function and add it to
987
attr[attrname] = fixscope(attribute,
1718
attr[attrname] = fixscope(attribute, new_function)
989
1719
# Is this a D-Bus method?
990
1720
elif getattr(attribute, "_dbus_is_method", False):
991
1721
# Create a new, but exactly alike, function
992
1722
# object. Decorate it to be a new D-Bus method
993
1723
# with the alternate D-Bus interface name. Add it
995
attr[attrname] = (dbus.service.method
997
attribute._dbus_in_signature,
998
attribute._dbus_out_signature)
1000
(attribute.func_code,
1001
attribute.func_globals,
1002
attribute.func_name,
1003
attribute.func_defaults,
1004
attribute.func_closure)))
1726
dbus.service.method(
1728
attribute._dbus_in_signature,
1729
attribute._dbus_out_signature)
1730
(copy_function(attribute)))
1731
# Copy annotations, if any
1733
attr[attrname]._dbus_annotations = dict(
1734
attribute._dbus_annotations)
1735
except AttributeError:
1005
1737
# Is this a D-Bus property?
1006
1738
elif getattr(attribute, "_dbus_is_property", False):
1007
1739
# Create a new, but exactly alike, function
1008
1740
# object, and decorate it to be a new D-Bus
1009
1741
# property with the alternate D-Bus interface
1010
1742
# name. Add it to the class.
1011
attr[attrname] = (dbus_service_property
1013
attribute._dbus_signature,
1014
attribute._dbus_access,
1016
._dbus_get_args_options
1019
(attribute.func_code,
1020
attribute.func_globals,
1021
attribute.func_name,
1022
attribute.func_defaults,
1023
attribute.func_closure)))
1024
return type.__new__(mcs, name, bases, attr)
1743
attr[attrname] = (dbus_service_property(
1744
alt_interface, attribute._dbus_signature,
1745
attribute._dbus_access,
1746
attribute._dbus_get_args_options
1748
(copy_function(attribute)))
1749
# Copy annotations, if any
1751
attr[attrname]._dbus_annotations = dict(
1752
attribute._dbus_annotations)
1753
except AttributeError:
1755
# Is this a D-Bus interface?
1756
elif getattr(attribute, "_dbus_is_interface", False):
1757
# Create a new, but exactly alike, function
1758
# object. Decorate it to be a new D-Bus interface
1759
# with the alternate D-Bus interface name. Add it
1762
dbus_interface_annotations(alt_interface)
1763
(copy_function(attribute)))
1765
# Deprecate all alternate interfaces
1766
iname = "_AlternateDBusNames_interface_annotation{}"
1767
for interface_name in interface_names:
1769
@dbus_interface_annotations(interface_name)
1771
return {"org.freedesktop.DBus.Deprecated":
1773
# Find an unused name
1774
for aname in (iname.format(i)
1775
for i in itertools.count()):
1776
if aname not in attr:
1780
# Replace the class with a new subclass of it with
1781
# methods, signals, etc. as created above.
1782
if sys.version_info.major == 2:
1783
cls = type(b"{}Alternate".format(cls.__name__),
1786
cls = type("{}Alternate".format(cls.__name__),
1793
@alternate_dbus_interfaces({"se.recompile.Mandos":
1794
"se.bsnet.fukt.Mandos"})
1027
1795
class ClientDBus(Client, DBusObjectWithProperties):
1028
1796
"""A Client class using D-Bus
1031
1799
dbus_object_path: dbus.ObjectPath
1032
1800
bus: dbus.SystemBus()
1035
1803
runtime_expansions = (Client.runtime_expansions
1036
+ ("dbus_object_path",))
1804
+ ("dbus_object_path", ))
1806
_interface = "se.recompile.Mandos.Client"
1038
1808
# dbus.service.Object doesn't use super(), so we can't either.
1040
def __init__(self, bus = None, *args, **kwargs):
1810
def __init__(self, bus=None, *args, **kwargs):
1042
1812
Client.__init__(self, *args, **kwargs)
1044
self._approvals_pending = 0
1045
1813
# Only now, when this client is initialized, can it show up on
1047
client_object_name = unicode(self.name).translate(
1815
client_object_name = str(self.name).translate(
1048
1816
{ord("."): ord("_"),
1049
1817
ord("-"): ord("_")})
1050
self.dbus_object_path = (dbus.ObjectPath
1051
("/clients/" + client_object_name))
1818
self.dbus_object_path = dbus.ObjectPath(
1819
"/clients/" + client_object_name)
1052
1820
DBusObjectWithProperties.__init__(self, self.bus,
1053
1821
self.dbus_object_path)
1055
def notifychangeproperty(transform_func,
1056
dbus_name, type_func=lambda x: x,
1823
def notifychangeproperty(transform_func, dbus_name,
1824
type_func=lambda x: x,
1826
invalidate_only=False,
1827
_interface=_interface):
1058
1828
""" Modify a variable so that it's a property which announces
1059
1829
its changes to DBus.
1061
1831
transform_fun: Function that takes a value and a variant_level
1062
1832
and transforms it to a D-Bus type.
1063
1833
dbus_name: D-Bus name of the variable
1065
1835
to the D-Bus. Default: no transform
1066
1836
variant_level: D-Bus variant level. Default: 1
1068
attrname = "_{0}".format(dbus_name)
1838
attrname = "_{}".format(dbus_name)
1069
1840
def setter(self, value):
1070
1841
if hasattr(self, "dbus_object_path"):
1071
1842
if (not hasattr(self, attrname) or
1072
1843
type_func(getattr(self, attrname, None))
1073
1844
!= type_func(value)):
1074
dbus_value = transform_func(type_func(value),
1077
self.PropertyChanged(dbus.String(dbus_name),
1846
self.PropertiesChanged(
1847
_interface, dbus.Dictionary(),
1848
dbus.Array((dbus_name, )))
1850
dbus_value = transform_func(
1852
variant_level=variant_level)
1853
self.PropertyChanged(dbus.String(dbus_name),
1855
self.PropertiesChanged(
1857
dbus.Dictionary({dbus.String(dbus_name):
1079
1860
setattr(self, attrname, value)
1081
1862
return property(lambda self: getattr(self, attrname), setter)
1084
1864
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1085
1865
approvals_pending = notifychangeproperty(dbus.Boolean,
1086
1866
"ApprovalPending",
1088
1868
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1089
1869
last_enabled = notifychangeproperty(datetime_to_dbus,
1091
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1092
type_func = lambda checker:
1093
checker is not None)
1871
checker = notifychangeproperty(
1872
dbus.Boolean, "CheckerRunning",
1873
type_func=lambda checker: checker is not None)
1094
1874
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1095
1875
"LastCheckedOK")
1876
last_checker_status = notifychangeproperty(dbus.Int16,
1877
"LastCheckerStatus")
1096
1878
last_approval_request = notifychangeproperty(
1097
1879
datetime_to_dbus, "LastApprovalRequest")
1098
1880
approved_by_default = notifychangeproperty(dbus.Boolean,
1099
1881
"ApprovedByDefault")
1100
approval_delay = notifychangeproperty(dbus.UInt64,
1103
timedelta_to_milliseconds)
1882
approval_delay = notifychangeproperty(
1883
dbus.UInt64, "ApprovalDelay",
1884
type_func=lambda td: td.total_seconds() * 1000)
1104
1885
approval_duration = notifychangeproperty(
1105
1886
dbus.UInt64, "ApprovalDuration",
1106
type_func = timedelta_to_milliseconds)
1887
type_func=lambda td: td.total_seconds() * 1000)
1107
1888
host = notifychangeproperty(dbus.String, "Host")
1108
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1110
timedelta_to_milliseconds)
1889
timeout = notifychangeproperty(
1890
dbus.UInt64, "Timeout",
1891
type_func=lambda td: td.total_seconds() * 1000)
1111
1892
extended_timeout = notifychangeproperty(
1112
1893
dbus.UInt64, "ExtendedTimeout",
1113
type_func = timedelta_to_milliseconds)
1114
interval = notifychangeproperty(dbus.UInt64,
1117
timedelta_to_milliseconds)
1894
type_func=lambda td: td.total_seconds() * 1000)
1895
interval = notifychangeproperty(
1896
dbus.UInt64, "Interval",
1897
type_func=lambda td: td.total_seconds() * 1000)
1118
1898
checker_command = notifychangeproperty(dbus.String, "Checker")
1899
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1900
invalidate_only=True)
1120
1902
del notifychangeproperty
1122
1904
def __del__(self, *args, **kwargs):
1124
1906
self.remove_from_connection()
1204
1985
server to mandos-client
1208
1989
# Rejected - signal
1209
1990
@dbus.service.signal(_interface, signature="s")
1210
1991
def Rejected(self, reason):
1214
1995
# NeedApproval - signal
1215
1996
@dbus.service.signal(_interface, signature="tb")
1216
1997
def NeedApproval(self, timeout, default):
1218
1999
return self.need_approval()
1220
# NeRwequest - signal
1221
@dbus.service.signal(_interface, signature="s")
1222
def NewRequest(self, ip):
1224
Is sent after a client request a password.
1230
2003
# Approve - method
1231
2004
@dbus.service.method(_interface, in_signature="b")
1232
2005
def Approve(self, value):
1233
2006
self.approve(value)
1235
2008
# CheckedOK - method
1236
2009
@dbus.service.method(_interface)
1237
2010
def CheckedOK(self):
1238
2011
self.checked_ok()
1240
2013
# Enable - method
2014
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1241
2015
@dbus.service.method(_interface)
1242
2016
def Enable(self):
1246
2020
# StartChecker - method
2021
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1247
2022
@dbus.service.method(_interface)
1248
2023
def StartChecker(self):
1250
2025
self.start_checker()
1252
2027
# Disable - method
2028
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1253
2029
@dbus.service.method(_interface)
1254
2030
def Disable(self):
1258
2034
# StopChecker - method
2035
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1259
2036
@dbus.service.method(_interface)
1260
2037
def StopChecker(self):
1261
2038
self.stop_checker()
1265
2042
# ApprovalPending - property
1266
2043
@dbus_service_property(_interface, signature="b", access="read")
1267
2044
def ApprovalPending_dbus_property(self):
1268
2045
return dbus.Boolean(bool(self.approvals_pending))
1270
2047
# ApprovedByDefault - property
1271
@dbus_service_property(_interface, signature="b",
2048
@dbus_service_property(_interface,
1272
2050
access="readwrite")
1273
2051
def ApprovedByDefault_dbus_property(self, value=None):
1274
2052
if value is None: # get
1275
2053
return dbus.Boolean(self.approved_by_default)
1276
2054
self.approved_by_default = bool(value)
1278
2056
# ApprovalDelay - property
1279
@dbus_service_property(_interface, signature="t",
2057
@dbus_service_property(_interface,
1280
2059
access="readwrite")
1281
2060
def ApprovalDelay_dbus_property(self, value=None):
1282
2061
if value is None: # get
1283
return dbus.UInt64(self.approval_delay_milliseconds())
2062
return dbus.UInt64(self.approval_delay.total_seconds()
1284
2064
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1286
2066
# ApprovalDuration - property
1287
@dbus_service_property(_interface, signature="t",
2067
@dbus_service_property(_interface,
1288
2069
access="readwrite")
1289
2070
def ApprovalDuration_dbus_property(self, value=None):
1290
2071
if value is None: # get
1291
return dbus.UInt64(timedelta_to_milliseconds(
1292
self.approval_duration))
2072
return dbus.UInt64(self.approval_duration.total_seconds()
1293
2074
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1295
2076
# Name - property
2078
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1296
2079
@dbus_service_property(_interface, signature="s", access="read")
1297
2080
def Name_dbus_property(self):
1298
2081
return dbus.String(self.name)
2085
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2086
@dbus_service_property(_interface, signature="s", access="read")
2087
def KeyID_dbus_property(self):
2088
return dbus.String(self.key_id)
1300
2090
# Fingerprint - property
2092
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1301
2093
@dbus_service_property(_interface, signature="s", access="read")
1302
2094
def Fingerprint_dbus_property(self):
1303
2095
return dbus.String(self.fingerprint)
1305
2097
# Host - property
1306
@dbus_service_property(_interface, signature="s",
2098
@dbus_service_property(_interface,
1307
2100
access="readwrite")
1308
2101
def Host_dbus_property(self, value=None):
1309
2102
if value is None: # get
1310
2103
return dbus.String(self.host)
1311
self.host = unicode(value)
2104
self.host = str(value)
1313
2106
# Created - property
2108
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1314
2109
@dbus_service_property(_interface, signature="s", access="read")
1315
2110
def Created_dbus_property(self):
1316
2111
return datetime_to_dbus(self.created)
1318
2113
# LastEnabled - property
1319
2114
@dbus_service_property(_interface, signature="s", access="read")
1320
2115
def LastEnabled_dbus_property(self):
1321
2116
return datetime_to_dbus(self.last_enabled)
1323
2118
# Enabled - property
1324
@dbus_service_property(_interface, signature="b",
2119
@dbus_service_property(_interface,
1325
2121
access="readwrite")
1326
2122
def Enabled_dbus_property(self, value=None):
1327
2123
if value is None: # get
1334
2130
# LastCheckedOK - property
1335
@dbus_service_property(_interface, signature="s",
2131
@dbus_service_property(_interface,
1336
2133
access="readwrite")
1337
2134
def LastCheckedOK_dbus_property(self, value=None):
1338
2135
if value is not None:
1339
2136
self.checked_ok()
1341
2138
return datetime_to_dbus(self.last_checked_ok)
2140
# LastCheckerStatus - property
2141
@dbus_service_property(_interface, signature="n", access="read")
2142
def LastCheckerStatus_dbus_property(self):
2143
return dbus.Int16(self.last_checker_status)
1343
2145
# Expires - property
1344
2146
@dbus_service_property(_interface, signature="s", access="read")
1345
2147
def Expires_dbus_property(self):
1346
2148
return datetime_to_dbus(self.expires)
1348
2150
# LastApprovalRequest - property
1349
2151
@dbus_service_property(_interface, signature="s", access="read")
1350
2152
def LastApprovalRequest_dbus_property(self):
1351
2153
return datetime_to_dbus(self.last_approval_request)
1353
2155
# Timeout - property
1354
@dbus_service_property(_interface, signature="t",
2156
@dbus_service_property(_interface,
1355
2158
access="readwrite")
1356
2159
def Timeout_dbus_property(self, value=None):
1357
2160
if value is None: # get
1358
return dbus.UInt64(self.timeout_milliseconds())
2161
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2162
old_timeout = self.timeout
1359
2163
self.timeout = datetime.timedelta(0, 0, 0, value)
1360
if getattr(self, "disable_initiator_tag", None) is None:
1362
# Reschedule timeout
1363
gobject.source_remove(self.disable_initiator_tag)
1364
self.disable_initiator_tag = None
1366
time_to_die = timedelta_to_milliseconds((self
1371
if time_to_die <= 0:
1372
# The timeout has passed
1375
self.expires = (datetime.datetime.utcnow()
1376
+ datetime.timedelta(milliseconds =
1378
self.disable_initiator_tag = (gobject.timeout_add
1379
(time_to_die, self.disable))
2164
# Reschedule disabling
2166
now = datetime.datetime.utcnow()
2167
self.expires += self.timeout - old_timeout
2168
if self.expires <= now:
2169
# The timeout has passed
2172
if (getattr(self, "disable_initiator_tag", None)
2175
GLib.source_remove(self.disable_initiator_tag)
2176
self.disable_initiator_tag = GLib.timeout_add(
2177
int((self.expires - now).total_seconds() * 1000),
1381
2180
# ExtendedTimeout - property
1382
@dbus_service_property(_interface, signature="t",
2181
@dbus_service_property(_interface,
1383
2183
access="readwrite")
1384
2184
def ExtendedTimeout_dbus_property(self, value=None):
1385
2185
if value is None: # get
1386
return dbus.UInt64(self.extended_timeout_milliseconds())
2186
return dbus.UInt64(self.extended_timeout.total_seconds()
1387
2188
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1389
2190
# Interval - property
1390
@dbus_service_property(_interface, signature="t",
2191
@dbus_service_property(_interface,
1391
2193
access="readwrite")
1392
2194
def Interval_dbus_property(self, value=None):
1393
2195
if value is None: # get
1394
return dbus.UInt64(self.interval_milliseconds())
2196
return dbus.UInt64(self.interval.total_seconds() * 1000)
1395
2197
self.interval = datetime.timedelta(0, 0, 0, value)
1396
2198
if getattr(self, "checker_initiator_tag", None) is None:
1398
2200
if self.enabled:
1399
2201
# Reschedule checker run
1400
gobject.source_remove(self.checker_initiator_tag)
1401
self.checker_initiator_tag = (gobject.timeout_add
1402
(value, self.start_checker))
1403
self.start_checker() # Start one now, too
2202
GLib.source_remove(self.checker_initiator_tag)
2203
self.checker_initiator_tag = GLib.timeout_add(
2204
value, self.start_checker)
2205
self.start_checker() # Start one now, too
1405
2207
# Checker - property
1406
@dbus_service_property(_interface, signature="s",
2208
@dbus_service_property(_interface,
1407
2210
access="readwrite")
1408
2211
def Checker_dbus_property(self, value=None):
1409
2212
if value is None: # get
1410
2213
return dbus.String(self.checker_command)
1411
self.checker_command = unicode(value)
2214
self.checker_command = str(value)
1413
2216
# CheckerRunning - property
1414
@dbus_service_property(_interface, signature="b",
2217
@dbus_service_property(_interface,
1415
2219
access="readwrite")
1416
2220
def CheckerRunning_dbus_property(self, value=None):
1417
2221
if value is None: # get
1450
2262
if data[0] == 'data':
1452
2264
if data[0] == 'function':
1453
2266
def func(*args, **kwargs):
1454
2267
self._pipe.send(('funcall', name, args, kwargs))
1455
2268
return self._pipe.recv()[1]
1458
2272
def __setattr__(self, name, value):
1459
2273
if name == '_pipe':
1460
2274
return super(ProxyClient, self).__setattr__(name, value)
1461
2275
self._pipe.send(('setattr', name, value))
1464
class ClientDBusTransitional(ClientDBus):
1465
__metaclass__ = AlternateDBusNamesMetaclass
1468
2278
class ClientHandler(socketserver.BaseRequestHandler, object):
1469
2279
"""A class to handle client connections.
1471
2281
Instantiated once for each connection to handle it.
1472
2282
Note: This will run in its own forked process."""
1474
2284
def handle(self):
1475
2285
with contextlib.closing(self.server.child_pipe) as child_pipe:
1476
2286
logger.info("TCP connection from: %s",
1477
unicode(self.client_address))
2287
str(self.client_address))
1478
2288
logger.debug("Pipe FD: %d",
1479
2289
self.server.child_pipe.fileno())
1481
session = (gnutls.connection
1482
.ClientSession(self.request,
1484
.X509Credentials()))
1486
# Note: gnutls.connection.X509Credentials is really a
1487
# generic GnuTLS certificate credentials object so long as
1488
# no X.509 keys are added to it. Therefore, we can use it
1489
# here despite using OpenPGP certificates.
1491
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1492
# "+AES-256-CBC", "+SHA1",
1493
# "+COMP-NULL", "+CTYPE-OPENPGP",
2291
session = gnutls.ClientSession(self.request)
2293
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2294
# "+AES-256-CBC", "+SHA1",
2295
# "+COMP-NULL", "+CTYPE-OPENPGP",
1495
2297
# Use a fallback default, since this MUST be set.
1496
2298
priority = self.server.gnutls_priority
1497
2299
if priority is None:
1498
2300
priority = "NORMAL"
1499
(gnutls.library.functions
1500
.gnutls_priority_set_direct(session._c_object,
2301
gnutls.priority_set_direct(session._c_object,
2302
priority.encode("utf-8"),
1503
2305
# Start communication using the Mandos protocol
1504
2306
# Get protocol number
1505
2307
line = self.request.makefile().readline()
1506
2308
logger.debug("Protocol version: %r", line)
1508
2310
if int(line.strip().split()[0]) > 1:
2311
raise RuntimeError(line)
1510
2312
except (ValueError, IndexError, RuntimeError) as error:
1511
2313
logger.error("Unknown protocol version: %s", error)
1514
2316
# Start GnuTLS connection
1516
2318
session.handshake()
1517
except gnutls.errors.GNUTLSError as error:
2319
except gnutls.Error as error:
1518
2320
logger.warning("Handshake failed: %s", error)
1519
2321
# Do not run session.bye() here: the session is not
1520
2322
# established. Just abandon the request.
1522
2324
logger.debug("Handshake succeeded")
1524
2326
approval_required = False
1527
fpr = self.fingerprint(self.peer_certificate
1530
gnutls.errors.GNUTLSError) as error:
1531
logger.warning("Bad certificate: %s", error)
1533
logger.debug("Fingerprint: %s", fpr)
1536
client = ProxyClient(child_pipe, fpr,
2328
if gnutls.has_rawpk:
2331
key_id = self.key_id(
2332
self.peer_certificate(session))
2333
except (TypeError, gnutls.Error) as error:
2334
logger.warning("Bad certificate: %s", error)
2336
logger.debug("Key ID: %s", key_id)
2341
fpr = self.fingerprint(
2342
self.peer_certificate(session))
2343
except (TypeError, gnutls.Error) as error:
2344
logger.warning("Bad certificate: %s", error)
2346
logger.debug("Fingerprint: %s", fpr)
2349
client = ProxyClient(child_pipe, key_id, fpr,
1537
2350
self.client_address)
1538
2351
except KeyError:
1541
if self.server.use_dbus:
1543
client.NewRequest(str(self.client_address))
1545
2354
if client.approval_delay:
1546
2355
delay = client.approval_delay
1547
2356
client.approvals_pending += 1
1548
2357
approval_required = True
1551
2360
if not client.enabled:
1552
2361
logger.info("Client %s is disabled",
1554
2363
if self.server.use_dbus:
1555
2364
# Emit D-Bus signal
1556
2365
client.Rejected("Disabled")
1559
2368
if client.approved or not client.approval_delay:
1560
#We are approved or approval is disabled
2369
# We are approved or approval is disabled
1562
2371
elif client.approved is None:
1563
2372
logger.info("Client %s needs approval",
1598
2405
delay -= time2 - time
1601
while sent_size < len(client.secret):
1603
sent = session.send(client.secret[sent_size:])
1604
except gnutls.errors.GNUTLSError as error:
1605
logger.warning("gnutls send failed")
1607
logger.debug("Sent: %d, remaining: %d",
1608
sent, len(client.secret)
1609
- (sent_size + sent))
2408
session.send(client.secret)
2409
except gnutls.Error as error:
2410
logger.warning("gnutls send failed",
1612
2414
logger.info("Sending secret to %s", client.name)
1613
2415
# bump the timeout using extended_timeout
1614
client.checked_ok(client.extended_timeout)
2416
client.bump_timeout(client.extended_timeout)
1615
2417
if self.server.use_dbus:
1616
2418
# Emit D-Bus signal
1617
2419
client.GotSecret()
1620
2422
if approval_required:
1621
2423
client.approvals_pending -= 1
1624
except gnutls.errors.GNUTLSError as error:
1625
logger.warning("GnuTLS bye failed")
2426
except gnutls.Error as error:
2427
logger.warning("GnuTLS bye failed",
1628
2431
def peer_certificate(session):
1629
"Return the peer's OpenPGP certificate as a bytestring"
1630
# If not an OpenPGP certificate...
1631
if (gnutls.library.functions
1632
.gnutls_certificate_type_get(session._c_object)
1633
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1634
# ...do the normal thing
1635
return session.peer_certificate
2432
"Return the peer's certificate as a bytestring"
2434
cert_type = gnutls.certificate_type_get2(session._c_object,
2436
except AttributeError:
2437
cert_type = gnutls.certificate_type_get(session._c_object)
2438
if gnutls.has_rawpk:
2439
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2441
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2442
# If not a valid certificate type...
2443
if cert_type not in valid_cert_types:
2444
logger.info("Cert type %r not in %r", cert_type,
2446
# ...return invalid data
1636
2448
list_size = ctypes.c_uint(1)
1637
cert_list = (gnutls.library.functions
1638
.gnutls_certificate_get_peers
2449
cert_list = (gnutls.certificate_get_peers
1639
2450
(session._c_object, ctypes.byref(list_size)))
1640
2451
if not bool(cert_list) and list_size.value != 0:
1641
raise gnutls.errors.GNUTLSError("error getting peer"
2452
raise gnutls.Error("error getting peer certificate")
1643
2453
if list_size.value == 0:
1645
2455
cert = cert_list[0]
1646
2456
return ctypes.string_at(cert.data, cert.size)
2459
def key_id(certificate):
2460
"Convert a certificate bytestring to a hexdigit key ID"
2461
# New GnuTLS "datum" with the public key
2462
datum = gnutls.datum_t(
2463
ctypes.cast(ctypes.c_char_p(certificate),
2464
ctypes.POINTER(ctypes.c_ubyte)),
2465
ctypes.c_uint(len(certificate)))
2466
# XXX all these need to be created in the gnutls "module"
2467
# New empty GnuTLS certificate
2468
pubkey = gnutls.pubkey_t()
2469
gnutls.pubkey_init(ctypes.byref(pubkey))
2470
# Import the raw public key into the certificate
2471
gnutls.pubkey_import(pubkey,
2472
ctypes.byref(datum),
2473
gnutls.X509_FMT_DER)
2474
# New buffer for the key ID
2475
buf = ctypes.create_string_buffer(32)
2476
buf_len = ctypes.c_size_t(len(buf))
2477
# Get the key ID from the raw public key into the buffer
2478
gnutls.pubkey_get_key_id(
2480
gnutls.KEYID_USE_SHA256,
2481
ctypes.cast(ctypes.byref(buf),
2482
ctypes.POINTER(ctypes.c_ubyte)),
2483
ctypes.byref(buf_len))
2484
# Deinit the certificate
2485
gnutls.pubkey_deinit(pubkey)
2487
# Convert the buffer to a Python bytestring
2488
key_id = ctypes.string_at(buf, buf_len.value)
2489
# Convert the bytestring to hexadecimal notation
2490
hex_key_id = binascii.hexlify(key_id).upper()
1649
2494
def fingerprint(openpgp):
1650
2495
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1651
2496
# New GnuTLS "datum" with the OpenPGP public key
1652
datum = (gnutls.library.types
1653
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1656
ctypes.c_uint(len(openpgp))))
2497
datum = gnutls.datum_t(
2498
ctypes.cast(ctypes.c_char_p(openpgp),
2499
ctypes.POINTER(ctypes.c_ubyte)),
2500
ctypes.c_uint(len(openpgp)))
1657
2501
# New empty GnuTLS certificate
1658
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1659
(gnutls.library.functions
1660
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2502
crt = gnutls.openpgp_crt_t()
2503
gnutls.openpgp_crt_init(ctypes.byref(crt))
1661
2504
# Import the OpenPGP public key into the certificate
1662
(gnutls.library.functions
1663
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1664
gnutls.library.constants
1665
.GNUTLS_OPENPGP_FMT_RAW))
2505
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2506
gnutls.OPENPGP_FMT_RAW)
1666
2507
# Verify the self signature in the key
1667
2508
crtverify = ctypes.c_uint()
1668
(gnutls.library.functions
1669
.gnutls_openpgp_crt_verify_self(crt, 0,
1670
ctypes.byref(crtverify)))
2509
gnutls.openpgp_crt_verify_self(crt, 0,
2510
ctypes.byref(crtverify))
1671
2511
if crtverify.value != 0:
1672
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1673
raise (gnutls.errors.CertificateSecurityError
2512
gnutls.openpgp_crt_deinit(crt)
2513
raise gnutls.CertificateSecurityError(code
1675
2515
# New buffer for the fingerprint
1676
2516
buf = ctypes.create_string_buffer(20)
1677
2517
buf_len = ctypes.c_size_t()
1678
2518
# Get the fingerprint from the certificate into the buffer
1679
(gnutls.library.functions
1680
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1681
ctypes.byref(buf_len)))
2519
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2520
ctypes.byref(buf_len))
1682
2521
# Deinit the certificate
1683
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2522
gnutls.openpgp_crt_deinit(crt)
1684
2523
# Convert the buffer to a Python bytestring
1685
2524
fpr = ctypes.string_at(buf, buf_len.value)
1686
2525
# Convert the bytestring to hexadecimal notation
1691
class MultiprocessingMixIn(object):
2530
class MultiprocessingMixIn:
1692
2531
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1693
2533
def sub_process_main(self, request, address):
1695
2535
self.finish_request(request, address)
1696
2536
except Exception:
1697
2537
self.handle_error(request, address)
1698
2538
self.close_request(request)
1700
2540
def process_request(self, request, address):
1701
2541
"""Start a new process to process the request."""
1702
proc = multiprocessing.Process(target = self.sub_process_main,
2542
proc = multiprocessing.Process(target=self.sub_process_main,
2543
args=(request, address))
1709
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2548
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
1710
2549
""" adds a pipe to the MixIn """
1711
2551
def process_request(self, request, client_address):
1712
2552
"""Overrides and wraps the original process_request().
1714
2554
This function creates a new pipe in self.pipe
1716
2556
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1718
2558
proc = MultiprocessingMixIn.process_request(self, request,
1719
2559
client_address)
1720
2560
self.child_pipe.close()
1721
2561
self.add_pipe(parent_pipe, proc)
1723
2563
def add_pipe(self, parent_pipe, proc):
1724
2564
"""Dummy function; override as necessary"""
1725
raise NotImplementedError
2565
raise NotImplementedError()
1728
2568
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1729
socketserver.TCPServer, object):
2569
socketserver.TCPServer):
1730
2570
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1733
2573
enabled: Boolean; whether this server is activated yet
1734
2574
interface: None or a network interface name (string)
1735
2575
use_ipv6: Boolean; to use IPv6 or not
1737
2578
def __init__(self, server_address, RequestHandlerClass,
1738
interface=None, use_ipv6=True):
2582
"""If socketfd is set, use that file descriptor instead of
2583
creating a new one with socket.socket().
1739
2585
self.interface = interface
1741
2587
self.address_family = socket.AF_INET6
2588
if socketfd is not None:
2589
# Save the file descriptor
2590
self.socketfd = socketfd
2591
# Save the original socket.socket() function
2592
self.socket_socket = socket.socket
2594
# To implement --socket, we monkey patch socket.socket.
2596
# (When socketserver.TCPServer is a new-style class, we
2597
# could make self.socket into a property instead of monkey
2598
# patching socket.socket.)
2600
# Create a one-time-only replacement for socket.socket()
2601
@functools.wraps(socket.socket)
2602
def socket_wrapper(*args, **kwargs):
2603
# Restore original function so subsequent calls are
2605
socket.socket = self.socket_socket
2606
del self.socket_socket
2607
# This time only, return a new socket object from the
2608
# saved file descriptor.
2609
return socket.fromfd(self.socketfd, *args, **kwargs)
2610
# Replace socket.socket() function with wrapper
2611
socket.socket = socket_wrapper
2612
# The socketserver.TCPServer.__init__ will call
2613
# socket.socket(), which might be our replacement,
2614
# socket_wrapper(), if socketfd was set.
1742
2615
socketserver.TCPServer.__init__(self, server_address,
1743
2616
RequestHandlerClass)
1744
2618
def server_bind(self):
1745
2619
"""This overrides the normal server_bind() function
1746
2620
to bind to an interface if one was specified, and also NOT to
1747
2621
bind to an address or port if they were not specified."""
2622
global SO_BINDTODEVICE
1748
2623
if self.interface is not None:
1749
2624
if SO_BINDTODEVICE is None:
1750
logger.error("SO_BINDTODEVICE does not exist;"
1751
" cannot bind to interface %s",
1755
self.socket.setsockopt(socket.SOL_SOCKET,
1759
except socket.error as error:
1760
if error[0] == errno.EPERM:
1761
logger.error("No permission to"
1762
" bind to interface %s",
1764
elif error[0] == errno.ENOPROTOOPT:
1765
logger.error("SO_BINDTODEVICE not available;"
1766
" cannot bind to interface %s",
2625
# Fall back to a hard-coded value which seems to be
2627
logger.warning("SO_BINDTODEVICE not found, trying 25")
2628
SO_BINDTODEVICE = 25
2630
self.socket.setsockopt(
2631
socket.SOL_SOCKET, SO_BINDTODEVICE,
2632
(self.interface + "\0").encode("utf-8"))
2633
except socket.error as error:
2634
if error.errno == errno.EPERM:
2635
logger.error("No permission to bind to"
2636
" interface %s", self.interface)
2637
elif error.errno == errno.ENOPROTOOPT:
2638
logger.error("SO_BINDTODEVICE not available;"
2639
" cannot bind to interface %s",
2641
elif error.errno == errno.ENODEV:
2642
logger.error("Interface %s does not exist,"
2643
" cannot bind", self.interface)
1770
2646
# Only bind(2) the socket if we really need to.
1771
2647
if self.server_address[0] or self.server_address[1]:
2648
if self.server_address[1]:
2649
self.allow_reuse_address = True
1772
2650
if not self.server_address[0]:
1773
2651
if self.address_family == socket.AF_INET6:
1774
any_address = "::" # in6addr_any
2652
any_address = "::" # in6addr_any
1776
any_address = socket.INADDR_ANY
2654
any_address = "0.0.0.0" # INADDR_ANY
1777
2655
self.server_address = (any_address,
1778
2656
self.server_address[1])
1779
2657
elif not self.server_address[1]:
1780
self.server_address = (self.server_address[0],
2658
self.server_address = (self.server_address[0], 0)
1782
2659
# if self.interface:
1783
2660
# self.server_address = (self.server_address[0],
1887
2765
funcname = request[1]
1888
2766
args = request[2]
1889
2767
kwargs = request[3]
1891
2769
parent_pipe.send(('data', getattr(client_object,
1892
2770
funcname)(*args,
1895
2773
if command == 'getattr':
1896
2774
attrname = request[1]
1897
if callable(client_object.__getattribute__(attrname)):
1898
parent_pipe.send(('function',))
2775
if isinstance(client_object.__getattribute__(attrname),
2776
collections.abc.Callable):
2777
parent_pipe.send(('function', ))
1900
parent_pipe.send(('data', client_object
1901
.__getattribute__(attrname)))
2780
'data', client_object.__getattribute__(attrname)))
1903
2782
if command == 'setattr':
1904
2783
attrname = request[1]
1905
2784
value = request[2]
1906
2785
setattr(client_object, attrname, value)
2790
def rfc3339_duration_to_delta(duration):
2791
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2793
>>> timedelta = datetime.timedelta
2794
>>> rfc3339_duration_to_delta("P7D") == timedelta(7)
2796
>>> rfc3339_duration_to_delta("PT60S") == timedelta(0, 60)
2798
>>> rfc3339_duration_to_delta("PT60M") == timedelta(0, 3600)
2800
>>> rfc3339_duration_to_delta("PT24H") == timedelta(1)
2802
>>> rfc3339_duration_to_delta("P1W") == timedelta(7)
2804
>>> rfc3339_duration_to_delta("PT5M30S") == timedelta(0, 330)
2806
>>> rfc3339_duration_to_delta("P1DT3M20S") == timedelta(1, 200)
2811
# Parsing an RFC 3339 duration with regular expressions is not
2812
# possible - there would have to be multiple places for the same
2813
# values, like seconds. The current code, while more esoteric, is
2814
# cleaner without depending on a parsing library. If Python had a
2815
# built-in library for parsing we would use it, but we'd like to
2816
# avoid excessive use of external libraries.
2818
# New type for defining tokens, syntax, and semantics all-in-one
2819
Token = collections.namedtuple("Token", (
2820
"regexp", # To match token; if "value" is not None, must have
2821
# a "group" containing digits
2822
"value", # datetime.timedelta or None
2823
"followers")) # Tokens valid after this token
2824
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2825
# the "duration" ABNF definition in RFC 3339, Appendix A.
2826
token_end = Token(re.compile(r"$"), None, frozenset())
2827
token_second = Token(re.compile(r"(\d+)S"),
2828
datetime.timedelta(seconds=1),
2829
frozenset((token_end, )))
2830
token_minute = Token(re.compile(r"(\d+)M"),
2831
datetime.timedelta(minutes=1),
2832
frozenset((token_second, token_end)))
2833
token_hour = Token(re.compile(r"(\d+)H"),
2834
datetime.timedelta(hours=1),
2835
frozenset((token_minute, token_end)))
2836
token_time = Token(re.compile(r"T"),
2838
frozenset((token_hour, token_minute,
2840
token_day = Token(re.compile(r"(\d+)D"),
2841
datetime.timedelta(days=1),
2842
frozenset((token_time, token_end)))
2843
token_month = Token(re.compile(r"(\d+)M"),
2844
datetime.timedelta(weeks=4),
2845
frozenset((token_day, token_end)))
2846
token_year = Token(re.compile(r"(\d+)Y"),
2847
datetime.timedelta(weeks=52),
2848
frozenset((token_month, token_end)))
2849
token_week = Token(re.compile(r"(\d+)W"),
2850
datetime.timedelta(weeks=1),
2851
frozenset((token_end, )))
2852
token_duration = Token(re.compile(r"P"), None,
2853
frozenset((token_year, token_month,
2854
token_day, token_time,
2856
# Define starting values:
2858
value = datetime.timedelta()
2860
# Following valid tokens
2861
followers = frozenset((token_duration, ))
2862
# String left to parse
2864
# Loop until end token is found
2865
while found_token is not token_end:
2866
# Search for any currently valid tokens
2867
for token in followers:
2868
match = token.regexp.match(s)
2869
if match is not None:
2871
if token.value is not None:
2872
# Value found, parse digits
2873
factor = int(match.group(1), 10)
2874
# Add to value so far
2875
value += factor * token.value
2876
# Strip token from string
2877
s = token.regexp.sub("", s, 1)
2880
# Set valid next tokens
2881
followers = found_token.followers
2884
# No currently valid tokens were found
2885
raise ValueError("Invalid RFC 3339 duration: {!r}"
1911
2891
def string_to_delta(interval):
1912
2892
"""Parse a string and return a datetime.timedelta
1914
>>> string_to_delta('7d')
1915
datetime.timedelta(7)
1916
>>> string_to_delta('60s')
1917
datetime.timedelta(0, 60)
1918
>>> string_to_delta('60m')
1919
datetime.timedelta(0, 3600)
1920
>>> string_to_delta('24h')
1921
datetime.timedelta(1)
1922
>>> string_to_delta('1w')
1923
datetime.timedelta(7)
1924
>>> string_to_delta('5m 30s')
1925
datetime.timedelta(0, 330)
2894
>>> string_to_delta('7d') == datetime.timedelta(7)
2896
>>> string_to_delta('60s') == datetime.timedelta(0, 60)
2898
>>> string_to_delta('60m') == datetime.timedelta(0, 3600)
2900
>>> string_to_delta('24h') == datetime.timedelta(1)
2902
>>> string_to_delta('1w') == datetime.timedelta(7)
2904
>>> string_to_delta('5m 30s') == datetime.timedelta(0, 330)
2909
return rfc3339_duration_to_delta(interval)
1927
2913
timevalue = datetime.timedelta(0)
1928
2914
for s in interval.split():
1930
suffix = unicode(s[-1])
1931
2917
value = int(s[:-1])
1932
2918
if suffix == "d":
1933
2919
delta = datetime.timedelta(value)
2005
2991
parser.add_argument("--no-dbus", action="store_false",
2006
2992
dest="use_dbus", help="Do not provide D-Bus"
2007
" system bus interface")
2993
" system bus interface", default=None)
2008
2994
parser.add_argument("--no-ipv6", action="store_false",
2009
dest="use_ipv6", help="Do not use IPv6")
2995
dest="use_ipv6", help="Do not use IPv6",
2010
2997
parser.add_argument("--no-restore", action="store_false",
2011
2998
dest="restore", help="Do not restore stored"
2999
" state", default=None)
3000
parser.add_argument("--socket", type=int,
3001
help="Specify a file descriptor to a network"
3002
" socket to use instead of creating one")
2013
3003
parser.add_argument("--statedir", metavar="DIR",
2014
3004
help="Directory to save/restore state in")
3005
parser.add_argument("--foreground", action="store_true",
3006
help="Run in foreground", default=None)
3007
parser.add_argument("--no-zeroconf", action="store_false",
3008
dest="zeroconf", help="Do not use Zeroconf",
2016
3011
options = parser.parse_args()
2023
3013
# Default values for config file for server-global settings
2024
server_defaults = { "interface": "",
2029
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2030
"servicename": "Mandos",
2035
"statedir": "/var/lib/mandos"
3014
if gnutls.has_rawpk:
3015
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
3016
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
3018
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
3019
":+SIGN-DSA-SHA256")
3020
server_defaults = {"interface": "",
3024
"priority": priority,
3025
"servicename": "Mandos",
3031
"statedir": "/var/lib/mandos",
3032
"foreground": "False",
2038
3037
# Parse config file for server-global settings
2039
server_config = configparser.SafeConfigParser(server_defaults)
3038
server_config = configparser.ConfigParser(server_defaults)
2040
3039
del server_defaults
2041
server_config.read(os.path.join(options.configdir,
2043
# Convert the SafeConfigParser object to a dict
3040
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3041
# Convert the ConfigParser object to a dict
2044
3042
server_settings = server_config.defaults()
2045
3043
# Use the appropriate methods on the non-string config options
2046
for option in ("debug", "use_dbus", "use_ipv6"):
3044
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3045
"foreground", "zeroconf"):
2047
3046
server_settings[option] = server_config.getboolean("DEFAULT",
2049
3048
if server_settings["port"]:
2050
3049
server_settings["port"] = server_config.getint("DEFAULT",
3051
if server_settings["socket"]:
3052
server_settings["socket"] = server_config.getint("DEFAULT",
3054
# Later, stdin will, and stdout and stderr might, be dup'ed
3055
# over with an opened os.devnull. But we don't want this to
3056
# happen with a supplied network socket.
3057
if 0 <= server_settings["socket"] <= 2:
3058
server_settings["socket"] = os.dup(server_settings
2052
3060
del server_config
2054
3062
# Override the settings from the config file with command line
2055
3063
# options, if set.
2056
3064
for option in ("interface", "address", "port", "debug",
2057
"priority", "servicename", "configdir",
2058
"use_dbus", "use_ipv6", "debuglevel", "restore",
3065
"priority", "servicename", "configdir", "use_dbus",
3066
"use_ipv6", "debuglevel", "restore", "statedir",
3067
"socket", "foreground", "zeroconf"):
2060
3068
value = getattr(options, option)
2061
3069
if value is not None:
2062
3070
server_settings[option] = value
2064
3072
# Force all strings to be unicode
2065
3073
for option in server_settings.keys():
2066
if type(server_settings[option]) is str:
2067
server_settings[option] = unicode(server_settings[option])
3074
if isinstance(server_settings[option], bytes):
3075
server_settings[option] = (server_settings[option]
3077
# Force all boolean options to be boolean
3078
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3079
"foreground", "zeroconf"):
3080
server_settings[option] = bool(server_settings[option])
3081
# Debug implies foreground
3082
if server_settings["debug"]:
3083
server_settings["foreground"] = True
2068
3084
# Now we have our good server settings in "server_settings"
2070
3086
##################################################################
3088
if (not server_settings["zeroconf"]
3089
and not (server_settings["port"]
3090
or server_settings["socket"] != "")):
3091
parser.error("Needs port or socket to work without Zeroconf")
2072
3093
# For convenience
2073
3094
debug = server_settings["debug"]
2074
3095
debuglevel = server_settings["debuglevel"]
2076
3097
use_ipv6 = server_settings["use_ipv6"]
2077
3098
stored_state_path = os.path.join(server_settings["statedir"],
2078
3099
stored_state_file)
3100
foreground = server_settings["foreground"]
3101
zeroconf = server_settings["zeroconf"]
2081
initlogger(logging.DEBUG)
3104
initlogger(debug, logging.DEBUG)
2083
3106
if not debuglevel:
2086
3109
level = getattr(logging, debuglevel.upper())
3110
initlogger(debug, level)
2089
3112
if server_settings["servicename"] != "Mandos":
2090
syslogger.setFormatter(logging.Formatter
2091
('Mandos (%s) [%%(process)d]:'
2092
' %%(levelname)s: %%(message)s'
2093
% server_settings["servicename"]))
3113
syslogger.setFormatter(
3114
logging.Formatter('Mandos ({}) [%(process)d]:'
3115
' %(levelname)s: %(message)s'.format(
3116
server_settings["servicename"])))
2095
3118
# Parse config file with clients
2096
client_config = configparser.SafeConfigParser(Client.client_defaults)
3119
client_config = configparser.ConfigParser(Client.client_defaults)
2097
3120
client_config.read(os.path.join(server_settings["configdir"],
2098
3121
"clients.conf"))
2100
3123
global mandos_dbus_service
2101
3124
mandos_dbus_service = None
2103
tcp_server = MandosServer((server_settings["address"],
2104
server_settings["port"]),
2106
interface=(server_settings["interface"]
2110
server_settings["priority"],
2113
pidfilename = "/var/run/mandos.pid"
2115
pidfile = open(pidfilename, "w")
2117
logger.error("Could not open file %r", pidfilename)
2120
uid = pwd.getpwnam("_mandos").pw_uid
2121
gid = pwd.getpwnam("_mandos").pw_gid
2124
uid = pwd.getpwnam("mandos").pw_uid
2125
gid = pwd.getpwnam("mandos").pw_gid
3127
if server_settings["socket"] != "":
3128
socketfd = server_settings["socket"]
3129
tcp_server = MandosServer(
3130
(server_settings["address"], server_settings["port"]),
3132
interface=(server_settings["interface"] or None),
3134
gnutls_priority=server_settings["priority"],
3138
pidfilename = "/run/mandos.pid"
3139
if not os.path.isdir("/run/."):
3140
pidfilename = "/var/run/mandos.pid"
3143
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3144
except IOError as e:
3145
logger.error("Could not open file %r", pidfilename,
3148
for name, group in (("_mandos", "_mandos"),
3149
("mandos", "mandos"),
3150
("nobody", "nogroup")):
3152
uid = pwd.getpwnam(name).pw_uid
3153
gid = pwd.getpwnam(group).pw_gid
2126
3155
except KeyError:
2128
uid = pwd.getpwnam("nobody").pw_uid
2129
gid = pwd.getpwnam("nobody").pw_gid
3164
logger.debug("Did setuid/setgid to {}:{}".format(uid,
2136
3166
except OSError as error:
2137
if error[0] != errno.EPERM:
3167
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3168
.format(uid, gid, os.strerror(error.errno)))
3169
if error.errno != errno.EPERM:
2141
3173
# Enable all possible GnuTLS debugging
2143
3175
# "Use a log level over 10 to enable all debugging options."
2144
3176
# - GnuTLS manual
2145
gnutls.library.functions.gnutls_global_set_log_level(11)
2147
@gnutls.library.types.gnutls_log_func
3177
gnutls.global_set_log_level(11)
2148
3180
def debug_gnutls(level, string):
2149
3181
logger.debug("GnuTLS: %s", string[:-1])
2151
(gnutls.library.functions
2152
.gnutls_global_set_log_function(debug_gnutls))
3183
gnutls.global_set_log_function(debug_gnutls)
2154
3185
# Redirect stdin so all checkers get /dev/null
2155
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3186
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2156
3187
os.dup2(null, sys.stdin.fileno())
2160
# No console logging
2161
logger.removeHandler(console)
2163
3191
# Need to fork before connecting to D-Bus
2165
3193
# Close all input and output, do double fork, etc.
3196
if gi.version_info < (3, 10, 2):
3197
# multiprocessing will use threads, so before we use GLib we
3198
# need to inform GLib that threads will be used.
2168
3201
global main_loop
2169
3202
# From the Avahi example code
2170
DBusGMainLoop(set_as_default=True )
2171
main_loop = gobject.MainLoop()
3203
DBusGMainLoop(set_as_default=True)
3204
main_loop = GLib.MainLoop()
2172
3205
bus = dbus.SystemBus()
2173
3206
# End of Avahi example code
2176
3209
bus_name = dbus.service.BusName("se.recompile.Mandos",
2177
bus, do_not_queue=True)
2178
old_bus_name = (dbus.service.BusName
2179
("se.bsnet.fukt.Mandos", bus,
2181
except dbus.exceptions.NameExistsException as e:
2182
logger.error(unicode(e) + ", disabling D-Bus")
3212
old_bus_name = dbus.service.BusName(
3213
"se.bsnet.fukt.Mandos", bus,
3215
except dbus.exceptions.DBusException as e:
3216
logger.error("Disabling D-Bus:", exc_info=e)
2183
3217
use_dbus = False
2184
3218
server_settings["use_dbus"] = False
2185
3219
tcp_server.use_dbus = False
2186
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2187
service = AvahiServiceToSyslog(name =
2188
server_settings["servicename"],
2189
servicetype = "_mandos._tcp",
2190
protocol = protocol, bus = bus)
2191
if server_settings["interface"]:
2192
service.interface = (if_nametoindex
2193
(str(server_settings["interface"])))
3221
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3222
service = AvahiServiceToSyslog(
3223
name=server_settings["servicename"],
3224
servicetype="_mandos._tcp",
3227
if server_settings["interface"]:
3228
service.interface = if_nametoindex(
3229
server_settings["interface"].encode("utf-8"))
2195
3231
global multiprocessing_manager
2196
3232
multiprocessing_manager = multiprocessing.Manager()
2198
3234
client_class = Client
2200
client_class = functools.partial(ClientDBusTransitional,
3236
client_class = functools.partial(ClientDBus, bus=bus)
2203
3238
client_settings = Client.config_parser(client_config)
2204
3239
old_client_settings = {}
2205
3240
clients_data = {}
3242
# This is used to redirect stdout and stderr for checker processes
3244
wnull = open(os.devnull, "w") # A writable /dev/null
3245
# Only used if server is running in foreground but not in debug
3247
if debug or not foreground:
2207
3250
# Get client data and settings from last running state.
2208
3251
if server_settings["restore"]:
2210
3253
with open(stored_state_path, "rb") as stored_state:
2211
clients_data, old_client_settings = (pickle.load
3254
if sys.version_info.major == 2:
3255
clients_data, old_client_settings = pickle.load(
3258
bytes_clients_data, bytes_old_client_settings = (
3259
pickle.load(stored_state, encoding="bytes"))
3260
# Fix bytes to strings
3263
clients_data = {(key.decode("utf-8")
3264
if isinstance(key, bytes)
3267
bytes_clients_data.items()}
3268
del bytes_clients_data
3269
for key in clients_data:
3270
value = {(k.decode("utf-8")
3271
if isinstance(k, bytes) else k): v
3273
clients_data[key].items()}
3274
clients_data[key] = value
3276
value["client_structure"] = [
3278
if isinstance(s, bytes)
3280
value["client_structure"]]
3281
# .name, .host, and .checker_command
3282
for k in ("name", "host", "checker_command"):
3283
if isinstance(value[k], bytes):
3284
value[k] = value[k].decode("utf-8")
3285
if "key_id" not in value:
3286
value["key_id"] = ""
3287
elif "fingerprint" not in value:
3288
value["fingerprint"] = ""
3289
# old_client_settings
3291
old_client_settings = {
3292
(key.decode("utf-8")
3293
if isinstance(key, bytes)
3296
bytes_old_client_settings.items()}
3297
del bytes_old_client_settings
3298
# .host and .checker_command
3299
for value in old_client_settings.values():
3300
for attribute in ("host", "checker_command"):
3301
if isinstance(value[attribute], bytes):
3302
value[attribute] = (value[attribute]
2213
3304
os.remove(stored_state_path)
2214
3305
except IOError as e:
2215
logger.warning("Could not load persistent state: {0}"
2217
if e.errno != errno.ENOENT:
3306
if e.errno == errno.ENOENT:
3307
logger.warning("Could not load persistent state:"
3308
" {}".format(os.strerror(e.errno)))
3310
logger.critical("Could not load persistent state:",
3313
except EOFError as e:
3314
logger.warning("Could not load persistent state: "
2220
3318
with PGPEngine() as pgp:
2221
for client_name, client in clients_data.iteritems():
3319
for client_name, client in clients_data.items():
3320
# Skip removed clients
3321
if client_name not in client_settings:
2222
3324
# Decide which value to use after restoring saved state.
2223
3325
# We have three different values: Old config file,
2224
3326
# new config file, and saved state.
2229
3331
# For each value in new config, check if it
2230
3332
# differs from the old config value (Except for
2231
3333
# the "secret" attribute)
2232
if (name != "secret" and
2233
value != old_client_settings[client_name]
3334
if (name != "secret"
3336
old_client_settings[client_name][name])):
2235
3337
client[name] = value
2236
3338
except KeyError:
2239
3341
# Clients who has passed its expire date can still be
2240
# enabled if its last checker was successful. Clients
2241
# whose checker failed before we stored its state is
2242
# assumed to have failed all checkers during downtime.
3342
# enabled if its last checker was successful. A Client
3343
# whose checker succeeded before we stored its state is
3344
# assumed to have successfully run all checkers during
2243
3346
if client["enabled"]:
2244
3347
if datetime.datetime.utcnow() >= client["expires"]:
2245
3348
if not client["last_checked_ok"]:
2246
3349
logger.warning(
2247
"disabling client {0} - Client never "
2248
"performed a successfull checker"
2249
.format(client["name"]))
3350
"disabling client {} - Client never "
3351
"performed a successful checker".format(
2250
3353
client["enabled"] = False
2251
3354
elif client["last_checker_status"] != 0:
2252
3355
logger.warning(
2253
"disabling client {0} - Client "
2254
"last checker failed with error code {1}"
2255
.format(client["name"],
2256
client["last_checker_status"]))
3356
"disabling client {} - Client last"
3357
" checker failed with error code"
3360
client["last_checker_status"]))
2257
3361
client["enabled"] = False
2259
client["expires"] = (datetime.datetime
2261
+ client["timeout"])
3363
client["expires"] = (
3364
datetime.datetime.utcnow()
3365
+ client["timeout"])
3366
logger.debug("Last checker succeeded,"
3367
" keeping {} enabled".format(
2264
client["secret"] = (
2265
pgp.decrypt(client["encrypted_secret"],
2266
client_settings[client_name]
3370
client["secret"] = pgp.decrypt(
3371
client["encrypted_secret"],
3372
client_settings[client_name]["secret"])
2268
3373
except PGPError:
2269
3374
# If decryption fails, we use secret from new settings
2270
logger.debug("Failed to decrypt {0} old secret"
2271
.format(client_name))
2272
client["secret"] = (
2273
client_settings[client_name]["secret"])
3375
logger.debug("Failed to decrypt {} old secret".format(
3377
client["secret"] = (client_settings[client_name]
2276
3380
# Add/remove clients based on new changes made to config
2277
for client_name in set(old_client_settings) - set(client_settings):
3381
for client_name in (set(old_client_settings)
3382
- set(client_settings)):
2278
3383
del clients_data[client_name]
2279
for client_name in set(client_settings) - set(old_client_settings):
3384
for client_name in (set(client_settings)
3385
- set(old_client_settings)):
2280
3386
clients_data[client_name] = client_settings[client_name]
2282
# Create clients all clients
2283
for client_name, client in clients_data.iteritems():
3388
# Create all client objects
3389
for client_name, client in clients_data.items():
2284
3390
tcp_server.clients[client_name] = client_class(
2285
name = client_name, settings = client)
3393
server_settings=server_settings)
2287
3395
if not tcp_server.clients:
2288
3396
logger.warning("No clients defined")
2294
pidfile.write(str(pid) + "\n".encode("utf-8"))
2297
logger.error("Could not write to file %r with PID %d",
2300
# "pidfile" was never created
3399
if pidfile is not None:
3403
print(pid, file=pidfile)
3405
logger.error("Could not write to file %r with PID %d",
2302
3408
del pidfilename
2303
signal.signal(signal.SIGINT, signal.SIG_IGN)
2305
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2306
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3410
for termsig in (signal.SIGHUP, signal.SIGTERM):
3411
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3412
lambda: main_loop.quit() and False)
2309
class MandosDBusService(dbus.service.Object):
3416
@alternate_dbus_interfaces(
3417
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3418
class MandosDBusService(DBusObjectWithObjectManager):
2310
3419
"""A D-Bus proxy object"""
2311
3421
def __init__(self):
2312
3422
dbus.service.Object.__init__(self, bus, "/")
2313
3424
_interface = "se.recompile.Mandos"
2315
3426
@dbus.service.signal(_interface, signature="o")
2316
3427
def ClientAdded(self, objpath):
2320
3431
@dbus.service.signal(_interface, signature="ss")
2321
def ClientNotFound(self, fingerprint, address):
3432
def ClientNotFound(self, key_id, address):
3436
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2325
3438
@dbus.service.signal(_interface, signature="os")
2326
3439
def ClientRemoved(self, objpath, name):
3443
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2330
3445
@dbus.service.method(_interface, out_signature="ao")
2331
3446
def GetAllClients(self):
2333
return dbus.Array(c.dbus_object_path
2335
tcp_server.clients.itervalues())
3448
return dbus.Array(c.dbus_object_path for c in
3449
tcp_server.clients.values())
3451
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2337
3453
@dbus.service.method(_interface,
2338
3454
out_signature="a{oa{sv}}")
2339
3455
def GetAllClientsWithProperties(self):
2341
3457
return dbus.Dictionary(
2342
((c.dbus_object_path, c.GetAll(""))
2343
for c in tcp_server.clients.itervalues()),
3458
{c.dbus_object_path: c.GetAll(
3459
"se.recompile.Mandos.Client")
3460
for c in tcp_server.clients.values()},
2344
3461
signature="oa{sv}")
2346
3463
@dbus.service.method(_interface, in_signature="o")
2347
3464
def RemoveClient(self, object_path):
2349
for c in tcp_server.clients.itervalues():
3466
for c in tcp_server.clients.values():
2350
3467
if c.dbus_object_path == object_path:
2351
3468
del tcp_server.clients[c.name]
2352
3469
c.remove_from_connection()
2353
# Don't signal anything except ClientRemoved
3470
# Don't signal the disabling
2354
3471
c.disable(quiet=True)
2356
self.ClientRemoved(object_path, c.name)
3472
# Emit D-Bus signal for removal
3473
self.client_removed_signal(c)
2358
3475
raise KeyError(object_path)
2362
class MandosDBusServiceTransitional(MandosDBusService):
2363
__metaclass__ = AlternateDBusNamesMetaclass
2364
mandos_dbus_service = MandosDBusServiceTransitional()
3479
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3480
out_signature="a{oa{sa{sv}}}")
3481
def GetManagedObjects(self):
3483
return dbus.Dictionary(
3484
{client.dbus_object_path:
3486
{interface: client.GetAll(interface)
3488
client._get_all_interface_names()})
3489
for client in tcp_server.clients.values()})
3491
def client_added_signal(self, client):
3492
"""Send the new standard signal and the old signal"""
3494
# New standard signal
3495
self.InterfacesAdded(
3496
client.dbus_object_path,
3498
{interface: client.GetAll(interface)
3500
client._get_all_interface_names()}))
3502
self.ClientAdded(client.dbus_object_path)
3504
def client_removed_signal(self, client):
3505
"""Send the new standard signal and the old signal"""
3507
# New standard signal
3508
self.InterfacesRemoved(
3509
client.dbus_object_path,
3510
client._get_all_interface_names())
3512
self.ClientRemoved(client.dbus_object_path,
3515
mandos_dbus_service = MandosDBusService()
3517
# Save modules to variables to exempt the modules from being
3518
# unloaded before the function registered with atexit() is run.
3519
mp = multiprocessing
2367
3523
"Cleanup function; run on exit"
2370
multiprocessing.active_children()
3527
mp.active_children()
2371
3529
if not (tcp_server.clients or client_settings):
2374
3532
# Store client before exiting. Secrets are encrypted with key
2375
3533
# based on what config file has. If config file is
2376
3534
# removed/edited, old secret will thus be unrecovable.
2378
3536
with PGPEngine() as pgp:
2379
for client in tcp_server.clients.itervalues():
3537
for client in tcp_server.clients.values():
2380
3538
key = client_settings[client.name]["secret"]
2381
3539
client.encrypted_secret = pgp.encrypt(client.secret,
2383
3541
client_dict = {}
2385
3543
# A list of attributes that can not be pickled
2387
exclude = set(("bus", "changedstate", "secret",
2389
for name, typ in (inspect.getmembers
2390
(dbus.service.Object)):
3545
exclude = {"bus", "changedstate", "secret",
3546
"checker", "server_settings"}
3547
for name, typ in inspect.getmembers(dbus.service
2391
3549
exclude.add(name)
2393
3551
client_dict["encrypted_secret"] = (client
2394
3552
.encrypted_secret)
2395
3553
for attr in client.client_structure:
2396
3554
if attr not in exclude:
2397
3555
client_dict[attr] = getattr(client, attr)
2399
3557
clients[client.name] = client_dict
2400
3558
del client_settings[client.name]["secret"]
2403
with os.fdopen(os.open(stored_state_path,
2404
os.O_CREAT|os.O_WRONLY|os.O_TRUNC,
2405
0600), "wb") as stored_state:
2406
pickle.dump((clients, client_settings), stored_state)
3561
with tempfile.NamedTemporaryFile(
3565
dir=os.path.dirname(stored_state_path),
3566
delete=False) as stored_state:
3567
pickle.dump((clients, client_settings), stored_state,
3569
tempname = stored_state.name
3570
os.rename(tempname, stored_state_path)
2407
3571
except (IOError, OSError) as e:
2408
logger.warning("Could not save persistent state: {0}"
2410
if e.errno not in (errno.ENOENT, errno.EACCES):
3577
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3578
logger.warning("Could not save persistent state: {}"
3579
.format(os.strerror(e.errno)))
3581
logger.warning("Could not save persistent state:",
2413
3585
# Delete all clients, and settings from config
2414
3586
while tcp_server.clients:
2415
3587
name, client = tcp_server.clients.popitem()
2417
3589
client.remove_from_connection()
2418
# Don't signal anything except ClientRemoved
3590
# Don't signal the disabling
2419
3591
client.disable(quiet=True)
3592
# Emit D-Bus signal for removal
2422
mandos_dbus_service.ClientRemoved(client
3594
mandos_dbus_service.client_removed_signal(client)
2425
3595
client_settings.clear()
2427
3597
atexit.register(cleanup)
2429
for client in tcp_server.clients.itervalues():
3599
for client in tcp_server.clients.values():
2432
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3601
# Emit D-Bus signal for adding
3602
mandos_dbus_service.client_added_signal(client)
2433
3603
# Need to initiate checking of clients
2434
3604
if client.enabled:
2435
3605
client.init_checker()
2437
3607
tcp_server.enable()
2438
3608
tcp_server.server_activate()
2440
3610
# Find out what port we got
2441
service.port = tcp_server.socket.getsockname()[1]
3612
service.port = tcp_server.socket.getsockname()[1]
2443
3614
logger.info("Now listening on address %r, port %d,"
2444
" flowinfo %d, scope_id %d"
2445
% tcp_server.socket.getsockname())
3615
" flowinfo %d, scope_id %d",
3616
*tcp_server.socket.getsockname())
2447
logger.info("Now listening on address %r, port %d"
2448
% tcp_server.socket.getsockname())
2450
#service.interface = tcp_server.socket.getsockname()[3]
3618
logger.info("Now listening on address %r, port %d",
3619
*tcp_server.socket.getsockname())
3621
# service.interface = tcp_server.socket.getsockname()[3]
2453
# From the Avahi example code
2456
except dbus.exceptions.DBusException as error:
2457
logger.critical("DBusException: %s", error)
2460
# End of Avahi example code
2462
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2463
lambda *args, **kwargs:
2464
(tcp_server.handle_request
2465
(*args[2:], **kwargs) or True))
3625
# From the Avahi example code
3628
except dbus.exceptions.DBusException as error:
3629
logger.critical("D-Bus Exception", exc_info=error)
3632
# End of Avahi example code
3635
GLib.IOChannel.unix_new(tcp_server.fileno()),
3636
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
3637
lambda *args, **kwargs: (tcp_server.handle_request
3638
(*args[2:], **kwargs) or True))
2467
3640
logger.debug("Starting main loop")
2468
3641
main_loop.run()
2469
3642
except AvahiError as error:
2470
logger.critical("AvahiError: %s", error)
3643
logger.critical("Avahi Error", exc_info=error)
2473
3646
except KeyboardInterrupt: