70
import cPickle as pickle
63
import cPickle as pickle
73
64
import multiprocessing
85
71
import dbus.service
87
from gi.repository import GLib
88
74
from dbus.mainloop.glib import DBusGMainLoop
91
77
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:
122
82
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
123
83
except AttributeError:
125
# This is where SO_BINDTODEVICE was up to and including Python
127
85
from IN import SO_BINDTODEVICE
128
86
except ImportError:
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
87
SO_BINDTODEVICE = None
147
90
stored_state_file = "clients.pickle"
149
92
logger = logging.getLogger()
150
logging.captureWarnings(True) # Show warnings via the logging system
93
syslogger = (logging.handlers.SysLogHandler
94
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
95
address = str("/dev/log")))
154
if_nametoindex = ctypes.cdll.LoadLibrary(
155
ctypes.util.find_library("c")).if_nametoindex
98
if_nametoindex = (ctypes.cdll.LoadLibrary
99
(ctypes.util.find_library("c"))
156
101
except (OSError, AttributeError):
158
102
def if_nametoindex(interface):
159
103
"Get an interface index the hard way, i.e. using fcntl()"
160
104
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
161
105
with contextlib.closing(socket.socket()) as s:
162
106
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
163
struct.pack(b"16s16x", interface))
164
interface_index = struct.unpack("I", ifreq[16:20])[0]
107
struct.pack(str("16s16x"),
109
interface_index = struct.unpack(str("I"),
165
111
return interface_index
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
114
def initlogger(debug, level=logging.WARNING):
185
115
"""init logger and add loglevel"""
188
syslogger = (logging.handlers.SysLogHandler(
189
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
191
117
syslogger.setFormatter(logging.Formatter
192
118
('Mandos [%(process)d]: %(levelname)s:'
194
120
logger.addHandler(syslogger)
197
123
console = logging.StreamHandler()
198
124
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
255
169
os.rmdir(self.tempdir)
256
170
self.tempdir = None
258
172
def password_encode(self, password):
259
173
# Passphrase can not be empty and can not contain newlines or
260
174
# NUL bytes. So we prefix it and hex encode it.
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"))
175
return b"mandos" + binascii.hexlify(password)
269
177
def encrypt(self, data, password):
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:
178
self.gnupg.passphrase = self.password_encode(password)
179
with open(os.devnull, "w") as devnull:
181
proc = self.gnupg.run(['--symmetric'],
182
create_fhs=['stdin', 'stdout'],
183
attach_fhs={'stderr': devnull})
184
with contextlib.closing(proc.handles['stdin']) as f:
186
with contextlib.closing(proc.handles['stdout']) as f:
187
ciphertext = f.read()
191
self.gnupg.passphrase = None
285
192
return ciphertext
287
194
def decrypt(self, data, password):
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:
195
self.gnupg.passphrase = self.password_encode(password)
196
with open(os.devnull, "w") as devnull:
198
proc = self.gnupg.run(['--decrypt'],
199
create_fhs=['stdin', 'stdout'],
200
attach_fhs={'stderr': devnull})
201
with contextlib.closing(proc.handles['stdin']) as f:
203
with contextlib.closing(proc.handles['stdout']) as f:
204
decrypted_plaintext = f.read()
208
self.gnupg.passphrase = None
303
209
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
332
212
class AvahiError(Exception):
333
213
def __init__(self, value, *args, **kwargs):
334
214
self.value = value
335
return super(AvahiError, self).__init__(value, *args,
215
super(AvahiError, self).__init__(value, *args, **kwargs)
216
def __unicode__(self):
217
return unicode(repr(self.value))
339
219
class AvahiServiceError(AvahiError):
343
222
class AvahiGroupError(AvahiError):
226
class AvahiService(object):
348
227
"""An Avahi (Zeroconf) service.
351
230
interface: integer; avahi.IF_UNSPEC or an interface index.
352
231
Used to optionally bind to the specified interface.
353
232
name: string; Example: 'Mandos'
354
233
type: string; Example: '_mandos._tcp'.
355
See <https://www.iana.org/assignments/service-names-port-numbers>
234
See <http://www.dns-sd.org/ServiceTypes.html>
356
235
port: integer; what port to announce
357
236
TXT: list of strings; TXT record for the service
358
237
domain: string; Domain to publish on, default to .local if empty.
517
374
follow_name_owner_changes=True),
518
375
avahi.DBUS_INTERFACE_SERVER)
519
376
self.server.connect_to_signal("StateChanged",
520
self.server_state_changed)
377
self.server_state_changed)
521
378
self.server_state_changed(self.server.GetState())
524
380
class AvahiServiceToSyslog(AvahiService):
525
def rename(self, *args, **kwargs):
526
382
"""Add the new name to the syslog messages"""
527
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
528
syslogger.setFormatter(logging.Formatter(
529
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
383
ret = AvahiService.rename(self)
384
syslogger.setFormatter(logging.Formatter
385
('Mandos ({0}) [%(process)d]:'
386
' %(levelname)s: %(message)s'
534
# Pretend that we have a GnuTLS module
536
"""This isn't so much a class as it is a module-like namespace."""
538
library = ctypes.util.find_library("gnutls")
540
library = ctypes.util.find_library("gnutls-deb0")
541
_library = ctypes.cdll.LoadLibrary(library)
544
# Unless otherwise indicated, the constants and types below are
545
# all from the gnutls/gnutls.h C header file.
556
E_NO_CERTIFICATE_FOUND = -49
561
KEYID_USE_SHA256 = 1 # gnutls/x509.h
562
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
565
class session_int(ctypes.Structure):
567
session_t = ctypes.POINTER(session_int)
569
class certificate_credentials_st(ctypes.Structure):
571
certificate_credentials_t = ctypes.POINTER(
572
certificate_credentials_st)
573
certificate_type_t = ctypes.c_int
575
class datum_t(ctypes.Structure):
576
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
577
('size', ctypes.c_uint)]
579
class openpgp_crt_int(ctypes.Structure):
581
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
582
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
583
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
584
credentials_type_t = ctypes.c_int
585
transport_ptr_t = ctypes.c_void_p
586
close_request_t = ctypes.c_int
589
class Error(Exception):
590
def __init__(self, message=None, code=None, args=()):
591
# Default usage is by a message string, but if a return
592
# code is passed, convert it to a string with
595
if message is None and code is not None:
596
message = gnutls.strerror(code)
597
return super(gnutls.Error, self).__init__(
600
class CertificateSecurityError(Error):
606
self._c_object = gnutls.certificate_credentials_t()
607
gnutls.certificate_allocate_credentials(
608
ctypes.byref(self._c_object))
609
self.type = gnutls.CRD_CERTIFICATE
612
gnutls.certificate_free_credentials(self._c_object)
615
def __init__(self, socket, credentials=None):
616
self._c_object = gnutls.session_t()
617
gnutls_flags = gnutls.CLIENT
618
if gnutls.check_version(b"3.5.6"):
619
gnutls_flags |= gnutls.NO_TICKETS
621
gnutls_flags |= gnutls.ENABLE_RAWPK
622
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
624
gnutls.set_default_priority(self._c_object)
625
gnutls.transport_set_ptr(self._c_object, socket.fileno())
626
gnutls.handshake_set_private_extensions(self._c_object,
629
if credentials is None:
630
credentials = gnutls.Credentials()
631
gnutls.credentials_set(self._c_object, credentials.type,
632
ctypes.cast(credentials._c_object,
634
self.credentials = credentials
637
gnutls.deinit(self._c_object)
640
return gnutls.handshake(self._c_object)
642
def send(self, data):
646
data_len -= gnutls.record_send(self._c_object,
651
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
653
# Error handling functions
654
def _error_code(result):
655
"""A function to raise exceptions on errors, suitable
656
for the 'restype' attribute on ctypes functions"""
659
if result == gnutls.E_NO_CERTIFICATE_FOUND:
660
raise gnutls.CertificateSecurityError(code=result)
661
raise gnutls.Error(code=result)
663
def _retry_on_error(result, func, arguments):
664
"""A function to retry on some errors, suitable
665
for the 'errcheck' attribute on ctypes functions"""
667
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
668
return _error_code(result)
669
result = func(*arguments)
672
# Unless otherwise indicated, the function declarations below are
673
# all from the gnutls/gnutls.h C header file.
676
priority_set_direct = _library.gnutls_priority_set_direct
677
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
678
ctypes.POINTER(ctypes.c_char_p)]
679
priority_set_direct.restype = _error_code
681
init = _library.gnutls_init
682
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
683
init.restype = _error_code
685
set_default_priority = _library.gnutls_set_default_priority
686
set_default_priority.argtypes = [session_t]
687
set_default_priority.restype = _error_code
689
record_send = _library.gnutls_record_send
690
record_send.argtypes = [session_t, ctypes.c_void_p,
692
record_send.restype = ctypes.c_ssize_t
693
record_send.errcheck = _retry_on_error
695
certificate_allocate_credentials = (
696
_library.gnutls_certificate_allocate_credentials)
697
certificate_allocate_credentials.argtypes = [
698
ctypes.POINTER(certificate_credentials_t)]
699
certificate_allocate_credentials.restype = _error_code
701
certificate_free_credentials = (
702
_library.gnutls_certificate_free_credentials)
703
certificate_free_credentials.argtypes = [
704
certificate_credentials_t]
705
certificate_free_credentials.restype = None
707
handshake_set_private_extensions = (
708
_library.gnutls_handshake_set_private_extensions)
709
handshake_set_private_extensions.argtypes = [session_t,
711
handshake_set_private_extensions.restype = None
713
credentials_set = _library.gnutls_credentials_set
714
credentials_set.argtypes = [session_t, credentials_type_t,
716
credentials_set.restype = _error_code
718
strerror = _library.gnutls_strerror
719
strerror.argtypes = [ctypes.c_int]
720
strerror.restype = ctypes.c_char_p
722
certificate_type_get = _library.gnutls_certificate_type_get
723
certificate_type_get.argtypes = [session_t]
724
certificate_type_get.restype = _error_code
726
certificate_get_peers = _library.gnutls_certificate_get_peers
727
certificate_get_peers.argtypes = [session_t,
728
ctypes.POINTER(ctypes.c_uint)]
729
certificate_get_peers.restype = ctypes.POINTER(datum_t)
731
global_set_log_level = _library.gnutls_global_set_log_level
732
global_set_log_level.argtypes = [ctypes.c_int]
733
global_set_log_level.restype = None
735
global_set_log_function = _library.gnutls_global_set_log_function
736
global_set_log_function.argtypes = [log_func]
737
global_set_log_function.restype = None
739
deinit = _library.gnutls_deinit
740
deinit.argtypes = [session_t]
741
deinit.restype = None
743
handshake = _library.gnutls_handshake
744
handshake.argtypes = [session_t]
745
handshake.restype = _error_code
746
handshake.errcheck = _retry_on_error
748
transport_set_ptr = _library.gnutls_transport_set_ptr
749
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
750
transport_set_ptr.restype = None
752
bye = _library.gnutls_bye
753
bye.argtypes = [session_t, close_request_t]
754
bye.restype = _error_code
755
bye.errcheck = _retry_on_error
757
check_version = _library.gnutls_check_version
758
check_version.argtypes = [ctypes.c_char_p]
759
check_version.restype = ctypes.c_char_p
761
_need_version = b"3.3.0"
762
if check_version(_need_version) is None:
763
raise self.Error("Needs GnuTLS {} or later"
764
.format(_need_version))
766
_tls_rawpk_version = b"3.6.6"
767
has_rawpk = bool(check_version(_tls_rawpk_version))
771
class pubkey_st(ctypes.Structure):
773
pubkey_t = ctypes.POINTER(pubkey_st)
775
x509_crt_fmt_t = ctypes.c_int
777
# All the function declarations below are from gnutls/abstract.h
778
pubkey_init = _library.gnutls_pubkey_init
779
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
780
pubkey_init.restype = _error_code
782
pubkey_import = _library.gnutls_pubkey_import
783
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
785
pubkey_import.restype = _error_code
787
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
788
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
789
ctypes.POINTER(ctypes.c_ubyte),
790
ctypes.POINTER(ctypes.c_size_t)]
791
pubkey_get_key_id.restype = _error_code
793
pubkey_deinit = _library.gnutls_pubkey_deinit
794
pubkey_deinit.argtypes = [pubkey_t]
795
pubkey_deinit.restype = None
797
# All the function declarations below are from gnutls/openpgp.h
799
openpgp_crt_init = _library.gnutls_openpgp_crt_init
800
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
801
openpgp_crt_init.restype = _error_code
803
openpgp_crt_import = _library.gnutls_openpgp_crt_import
804
openpgp_crt_import.argtypes = [openpgp_crt_t,
805
ctypes.POINTER(datum_t),
807
openpgp_crt_import.restype = _error_code
809
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
810
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
811
ctypes.POINTER(ctypes.c_uint)]
812
openpgp_crt_verify_self.restype = _error_code
814
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
815
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
816
openpgp_crt_deinit.restype = None
818
openpgp_crt_get_fingerprint = (
819
_library.gnutls_openpgp_crt_get_fingerprint)
820
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
824
openpgp_crt_get_fingerprint.restype = _error_code
826
if check_version(b"3.6.4"):
827
certificate_type_get2 = _library.gnutls_certificate_type_get2
828
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
829
certificate_type_get2.restype = _error_code
831
# Remove non-public functions
832
del _error_code, _retry_on_error
835
def call_pipe(connection, # : multiprocessing.Connection
836
func, *args, **kwargs):
837
"""This function is meant to be called by multiprocessing.Process
839
This function runs func(*args, **kwargs), and writes the resulting
840
return value on the provided multiprocessing.Connection.
842
connection.send(func(*args, **kwargs))
390
def timedelta_to_milliseconds(td):
391
"Convert a datetime.timedelta() to milliseconds"
392
return ((td.days * 24 * 60 * 60 * 1000)
393
+ (td.seconds * 1000)
394
+ (td.microseconds // 1000))
396
class Client(object):
847
397
"""A representation of a client host served by this server.
850
400
approved: bool(); 'None' if not yet approved/disapproved
851
401
approval_delay: datetime.timedelta(); Time to wait for approval
852
402
approval_duration: datetime.timedelta(); Duration of one approval
853
checker: multiprocessing.Process(); a running checker process used
854
to see if the client lives. 'None' if no process is
856
checker_callback_tag: a GLib event source tag, or None
403
checker: subprocess.Popen(); a running checker process used
404
to see if the client lives.
405
'None' if no process is running.
406
checker_callback_tag: a gobject event source tag, or None
857
407
checker_command: string; External command which is run to check
858
408
if client lives. %() expansions are done at
859
409
runtime with vars(self) as dict, so that for
860
410
instance %(name)s can be used in the command.
861
checker_initiator_tag: a GLib event source tag, or None
411
checker_initiator_tag: a gobject event source tag, or None
862
412
created: datetime.datetime(); (UTC) object creation
863
413
client_structure: Object describing what attributes a client has
864
414
and is used for storing the client at exit
865
415
current_checker_command: string; current running checker_command
866
disable_initiator_tag: a GLib event source tag, or None
416
disable_initiator_tag: a gobject event source tag, or None
868
418
fingerprint: string (40 or 32 hexadecimal digits); used to
869
uniquely identify an OpenPGP client
870
key_id: string (64 hexadecimal digits); used to uniquely identify
871
a client using raw public keys
419
uniquely identify the client
872
420
host: string; available for use by the checker command
873
421
interval: datetime.timedelta(); How often to start a new checker
874
422
last_approval_request: datetime.datetime(); (UTC) or None
995
545
self.current_checker_command = None
996
546
self.approved = None
997
547
self.approvals_pending = 0
998
self.changedstate = multiprocessing_manager.Condition(
999
multiprocessing_manager.Lock())
1000
self.client_structure = [attr
1001
for attr in self.__dict__.keys()
548
self.changedstate = (multiprocessing_manager
549
.Condition(multiprocessing_manager
551
self.client_structure = [attr for attr in
552
self.__dict__.iterkeys()
1002
553
if not attr.startswith("_")]
1003
554
self.client_structure.append("client_structure")
1005
for name, t in inspect.getmembers(
1006
type(self), lambda obj: isinstance(obj, property)):
556
for name, t in inspect.getmembers(type(self),
1007
560
if not name.startswith("_"):
1008
561
self.client_structure.append(name)
1010
563
# Send notice to process children that client state has changed
1011
564
def send_changedstate(self):
1012
565
with self.changedstate:
1013
566
self.changedstate.notify_all()
1015
568
def enable(self):
1016
569
"""Start this client's checker and timeout hooks"""
1017
570
if getattr(self, "enabled", False):
1018
571
# Already enabled
573
self.send_changedstate()
1020
574
self.expires = datetime.datetime.utcnow() + self.timeout
1021
575
self.enabled = True
1022
576
self.last_enabled = datetime.datetime.utcnow()
1023
577
self.init_checker()
1024
self.send_changedstate()
1026
579
def disable(self, quiet=True):
1027
580
"""Disable this client."""
1028
581
if not getattr(self, "enabled", False):
584
self.send_changedstate()
1031
586
logger.info("Disabling client %s", self.name)
1032
if getattr(self, "disable_initiator_tag", None) is not None:
1033
GLib.source_remove(self.disable_initiator_tag)
587
if getattr(self, "disable_initiator_tag", False):
588
gobject.source_remove(self.disable_initiator_tag)
1034
589
self.disable_initiator_tag = None
1035
590
self.expires = None
1036
if getattr(self, "checker_initiator_tag", None) is not None:
1037
GLib.source_remove(self.checker_initiator_tag)
591
if getattr(self, "checker_initiator_tag", False):
592
gobject.source_remove(self.checker_initiator_tag)
1038
593
self.checker_initiator_tag = None
1039
594
self.stop_checker()
1040
595
self.enabled = False
1042
self.send_changedstate()
1043
# Do not run this again if called by a GLib.timeout_add
596
# Do not run this again if called by a gobject.timeout_add
1046
599
def __del__(self):
1049
602
def init_checker(self):
1050
603
# Schedule a new checker to be started an 'interval' from now,
1051
604
# and every interval from then on.
1052
if self.checker_initiator_tag is not None:
1053
GLib.source_remove(self.checker_initiator_tag)
1054
self.checker_initiator_tag = GLib.timeout_add(
1055
random.randrange(int(self.interval.total_seconds() * 1000
605
self.checker_initiator_tag = (gobject.timeout_add
606
(self.interval_milliseconds(),
1058
608
# Schedule a disable() when 'timeout' has passed
1059
if self.disable_initiator_tag is not None:
1060
GLib.source_remove(self.disable_initiator_tag)
1061
self.disable_initiator_tag = GLib.timeout_add(
1062
int(self.timeout.total_seconds() * 1000), self.disable)
609
self.disable_initiator_tag = (gobject.timeout_add
610
(self.timeout_milliseconds(),
1063
612
# Also start a new checker *right now*.
1064
613
self.start_checker()
1066
def checker_callback(self, source, condition, connection,
615
def checker_callback(self, pid, condition, command):
1068
616
"""The checker has completed, so take appropriate actions."""
1069
# Read return code from connection (see call_pipe)
1070
returncode = connection.recv()
1072
if self.checker is not None:
1074
617
self.checker_callback_tag = None
1075
618
self.checker = None
1078
self.last_checker_status = returncode
1079
self.last_checker_signal = None
619
if os.WIFEXITED(condition):
620
self.last_checker_status = os.WEXITSTATUS(condition)
1080
621
if self.last_checker_status == 0:
1081
622
logger.info("Checker for %(name)s succeeded",
1083
624
self.checked_ok()
1085
logger.info("Checker for %(name)s failed", vars(self))
626
logger.info("Checker for %(name)s failed",
1087
629
self.last_checker_status = -1
1088
self.last_checker_signal = -returncode
1089
630
logger.warning("Checker for %(name)s crashed?",
1093
633
def checked_ok(self):
1094
634
"""Assert that the client has been seen, alive and well."""
1095
635
self.last_checked_ok = datetime.datetime.utcnow()
1096
636
self.last_checker_status = 0
1097
self.last_checker_signal = None
1098
637
self.bump_timeout()
1100
639
def bump_timeout(self, timeout=None):
1101
640
"""Bump up the timeout for this client."""
1102
641
if timeout is None:
1103
642
timeout = self.timeout
1104
643
if self.disable_initiator_tag is not None:
1105
GLib.source_remove(self.disable_initiator_tag)
1106
self.disable_initiator_tag = None
644
gobject.source_remove(self.disable_initiator_tag)
1107
645
if getattr(self, "enabled", False):
1108
self.disable_initiator_tag = GLib.timeout_add(
1109
int(timeout.total_seconds() * 1000), self.disable)
646
self.disable_initiator_tag = (gobject.timeout_add
647
(timedelta_to_milliseconds
648
(timeout), self.disable))
1110
649
self.expires = datetime.datetime.utcnow() + timeout
1112
651
def need_approval(self):
1113
652
self.last_approval_request = datetime.datetime.utcnow()
1115
654
def start_checker(self):
1116
655
"""Start a new checker subprocess if one is not running.
1118
657
If a checker already exists, leave it running and do
1120
659
# The reason for not killing a running checker is that if we
1121
# did that, and if a checker (for some reason) started running
1122
# slowly and taking more than 'interval' time, then the client
1123
# would inevitably timeout, since no checker would get a
1124
# chance to run to completion. If we instead leave running
660
# did that, then if a checker (for some reason) started
661
# running slowly and taking more than 'interval' time, the
662
# client would inevitably timeout, since no checker would get
663
# a chance to run to completion. If we instead leave running
1125
664
# checkers alone, the checker would have to take more time
1126
665
# than 'timeout' for the client to be disabled, which is as it
1129
if self.checker is not None and not self.checker.is_alive():
1130
logger.warning("Checker was not alive; joining")
668
# If a checker exists, make sure it is not a zombie
670
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
671
except (AttributeError, OSError) as error:
672
if (isinstance(error, OSError)
673
and error.errno != errno.ECHILD):
677
logger.warning("Checker was a zombie")
678
gobject.source_remove(self.checker_callback_tag)
679
self.checker_callback(pid, status,
680
self.current_checker_command)
1133
681
# Start a new checker if needed
1134
682
if self.checker is None:
1135
# Escape attributes for the shell
1137
attr: shlex.quote(str(getattr(self, attr)))
1138
for attr in self.runtime_expansions}
1140
command = self.checker_command % escaped_attrs
1141
except TypeError as error:
1142
logger.error('Could not format string "%s"',
1143
self.checker_command,
684
# In case checker_command has exactly one % operator
685
command = self.checker_command % self.host
687
# Escape attributes for the shell
688
escaped_attrs = dict(
690
re.escape(unicode(str(getattr(self, attr, "")),
694
self.runtime_expansions)
697
command = self.checker_command % escaped_attrs
698
except TypeError as error:
699
logger.error('Could not format string "%s"',
700
self.checker_command, exc_info=error)
701
return True # Try again later
702
self.current_checker_command = command
704
logger.info("Starting checker %r for %s",
706
# We don't need to redirect stdout and stderr, since
707
# in normal mode, that is already done by daemon(),
708
# and in debug mode we don't want to. (Stdin is
709
# always replaced by /dev/null.)
710
self.checker = subprocess.Popen(command,
713
self.checker_callback_tag = (gobject.child_watch_add
715
self.checker_callback,
717
# The checker may have completed before the gobject
718
# watch was added. Check for this.
719
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
721
gobject.source_remove(self.checker_callback_tag)
722
self.checker_callback(pid, status, command)
723
except OSError as error:
724
logger.error("Failed to start subprocess",
1145
return True # Try again later
1146
self.current_checker_command = command
1147
logger.info("Starting checker %r for %s", command,
1149
# We don't need to redirect stdout and stderr, since
1150
# in normal mode, that is already done by daemon(),
1151
# and in debug mode we don't want to. (Stdin is
1152
# always replaced by /dev/null.)
1153
# The exception is when not debugging but nevertheless
1154
# running in the foreground; use the previously
1156
popen_args = {"close_fds": True,
1159
if (not self.server_settings["debug"]
1160
and self.server_settings["foreground"]):
1161
popen_args.update({"stdout": wnull,
1163
pipe = multiprocessing.Pipe(duplex=False)
1164
self.checker = multiprocessing.Process(
1166
args=(pipe[1], subprocess.call, command),
1168
self.checker.start()
1169
self.checker_callback_tag = GLib.io_add_watch(
1170
GLib.IOChannel.unix_new(pipe[0].fileno()),
1171
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
1172
self.checker_callback, pipe[0], command)
1173
# Re-run this periodically if run by GLib.timeout_add
726
# Re-run this periodically if run by gobject.timeout_add
1176
729
def stop_checker(self):
1177
730
"""Force the checker process, if any, to stop."""
1178
731
if self.checker_callback_tag:
1179
GLib.source_remove(self.checker_callback_tag)
732
gobject.source_remove(self.checker_callback_tag)
1180
733
self.checker_callback_tag = None
1181
734
if getattr(self, "checker", None) is None:
1183
736
logger.debug("Stopping checker for %(name)s", vars(self))
1184
self.checker.terminate()
738
self.checker.terminate()
740
#if self.checker.poll() is None:
741
# self.checker.kill()
742
except OSError as error:
743
if error.errno != errno.ESRCH: # No such process
1185
745
self.checker = None
1188
def dbus_service_property(dbus_interface,
748
def dbus_service_property(dbus_interface, signature="v",
749
access="readwrite", byte_arrays=False):
1192
750
"""Decorators for marking methods of a DBusObjectWithProperties to
1193
751
become properties on the D-Bus.
1195
753
The decorated method will be called with no arguments by "Get"
1196
754
and with one argument by "Set".
1198
756
The parameters, where they are supported, are the same as
1199
757
dbus.service.method, except there is only "signature", since the
1200
758
type from Get() and the type sent to Set() is the same.
1283
class DBusObjectWithAnnotations(dbus.service.Object):
1284
"""A D-Bus object with annotations.
1286
Classes inheriting from this can use the dbus_annotations
1287
decorator to add annotations to methods or signals.
834
class DBusObjectWithProperties(dbus.service.Object):
835
"""A D-Bus object with properties.
837
Classes inheriting from this can use the dbus_service_property
838
decorator to expose methods as D-Bus properties. It exposes the
839
standard Get(), Set(), and GetAll() methods on the D-Bus.
1291
843
def _is_dbus_thing(thing):
1292
844
"""Returns a function testing if an attribute is a D-Bus thing
1294
846
If called like _is_dbus_thing("method") it returns a function
1295
847
suitable for use as predicate to inspect.getmembers().
1297
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
849
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
1300
852
def _get_all_dbus_things(self, thing):
1301
853
"""Returns a generator of (name, attribute) pairs
1303
return ((getattr(athing.__get__(self), "_dbus_name", name),
855
return ((getattr(athing.__get__(self), "_dbus_name",
1304
857
athing.__get__(self))
1305
858
for cls in self.__class__.__mro__
1306
859
for name, athing in
1307
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1309
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1311
path_keyword='object_path',
1312
connection_keyword='connection')
1313
def Introspect(self, object_path, connection):
1314
"""Overloading of standard D-Bus method.
1316
Inserts annotation tags on methods and signals.
1318
xmlstring = dbus.service.Object.Introspect(self, object_path,
1321
document = xml.dom.minidom.parseString(xmlstring)
1323
for if_tag in document.getElementsByTagName("interface"):
1324
# Add annotation tags
1325
for typ in ("method", "signal"):
1326
for tag in if_tag.getElementsByTagName(typ):
1328
for name, prop in (self.
1329
_get_all_dbus_things(typ)):
1330
if (name == tag.getAttribute("name")
1331
and prop._dbus_interface
1332
== if_tag.getAttribute("name")):
1333
annots.update(getattr(
1334
prop, "_dbus_annotations", {}))
1335
for name, value in annots.items():
1336
ann_tag = document.createElement(
1338
ann_tag.setAttribute("name", name)
1339
ann_tag.setAttribute("value", value)
1340
tag.appendChild(ann_tag)
1341
# Add interface annotation tags
1342
for annotation, value in dict(
1343
itertools.chain.from_iterable(
1344
annotations().items()
1345
for name, annotations
1346
in self._get_all_dbus_things("interface")
1347
if name == if_tag.getAttribute("name")
1349
ann_tag = document.createElement("annotation")
1350
ann_tag.setAttribute("name", annotation)
1351
ann_tag.setAttribute("value", value)
1352
if_tag.appendChild(ann_tag)
1353
# Fix argument name for the Introspect method itself
1354
if (if_tag.getAttribute("name")
1355
== dbus.INTROSPECTABLE_IFACE):
1356
for cn in if_tag.getElementsByTagName("method"):
1357
if cn.getAttribute("name") == "Introspect":
1358
for arg in cn.getElementsByTagName("arg"):
1359
if (arg.getAttribute("direction")
1361
arg.setAttribute("name",
1363
xmlstring = document.toxml("utf-8")
1365
except (AttributeError, xml.dom.DOMException,
1366
xml.parsers.expat.ExpatError) as error:
1367
logger.error("Failed to override Introspection method",
1372
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1373
"""A D-Bus object with properties.
1375
Classes inheriting from this can use the dbus_service_property
1376
decorator to expose methods as D-Bus properties. It exposes the
1377
standard Get(), Set(), and GetAll() methods on the D-Bus.
860
inspect.getmembers(cls,
861
self._is_dbus_thing(thing)))
1380
863
def _get_dbus_property(self, interface_name, property_name):
1381
864
"""Returns a bound method if one exists which is a D-Bus
1382
865
property with the specified name and interface.
1384
for cls in self.__class__.__mro__:
1385
for name, value in inspect.getmembers(
1386
cls, self._is_dbus_thing("property")):
867
for cls in self.__class__.__mro__:
868
for name, value in (inspect.getmembers
870
self._is_dbus_thing("property"))):
1387
871
if (value._dbus_name == property_name
1388
872
and value._dbus_interface == interface_name):
1389
873
return value.__get__(self)
1391
875
# No such property
1392
raise DBusPropertyNotFound("{}:{}.{}".format(
1393
self.dbus_object_path, interface_name, property_name))
1396
def _get_all_interface_names(cls):
1397
"""Get a sequence of all interfaces supported by an object"""
1398
return (name for name in set(getattr(getattr(x, attr),
1399
"_dbus_interface", None)
1400
for x in (inspect.getmro(cls))
1402
if name is not None)
1404
@dbus.service.method(dbus.PROPERTIES_IFACE,
876
raise DBusPropertyNotFound(self.dbus_object_path + ":"
877
+ interface_name + "."
880
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1406
881
out_signature="v")
1407
882
def Get(self, interface_name, property_name):
1408
883
"""Standard D-Bus property Get() method, see D-Bus standard.
1536
1013
return xmlstring
1540
dbus.OBJECT_MANAGER_IFACE
1541
except AttributeError:
1542
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1545
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1546
"""A D-Bus object with an ObjectManager.
1548
Classes inheriting from this exposes the standard
1549
GetManagedObjects call and the InterfacesAdded and
1550
InterfacesRemoved signals on the standard
1551
"org.freedesktop.DBus.ObjectManager" interface.
1553
Note: No signals are sent automatically; they must be sent
1556
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1557
out_signature="a{oa{sa{sv}}}")
1558
def GetManagedObjects(self):
1559
"""This function must be overridden"""
1560
raise NotImplementedError()
1562
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1563
signature="oa{sa{sv}}")
1564
def InterfacesAdded(self, object_path, interfaces_and_properties):
1567
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1568
def InterfacesRemoved(self, object_path, interfaces):
1571
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1573
path_keyword='object_path',
1574
connection_keyword='connection')
1575
def Introspect(self, object_path, connection):
1576
"""Overloading of standard D-Bus method.
1578
Override return argument name of GetManagedObjects to be
1579
"objpath_interfaces_and_properties"
1581
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1585
document = xml.dom.minidom.parseString(xmlstring)
1587
for if_tag in document.getElementsByTagName("interface"):
1588
# Fix argument name for the GetManagedObjects method
1589
if (if_tag.getAttribute("name")
1590
== dbus.OBJECT_MANAGER_IFACE):
1591
for cn in if_tag.getElementsByTagName("method"):
1592
if (cn.getAttribute("name")
1593
== "GetManagedObjects"):
1594
for arg in cn.getElementsByTagName("arg"):
1595
if (arg.getAttribute("direction")
1599
"objpath_interfaces"
1601
xmlstring = document.toxml("utf-8")
1603
except (AttributeError, xml.dom.DOMException,
1604
xml.parsers.expat.ExpatError) as error:
1605
logger.error("Failed to override Introspection method",
1610
def datetime_to_dbus(dt, variant_level=0):
1016
def datetime_to_dbus (dt, variant_level=0):
1611
1017
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1613
return dbus.String("", variant_level=variant_level)
1614
return dbus.String(dt.isoformat(), variant_level=variant_level)
1019
return dbus.String("", variant_level = variant_level)
1020
return dbus.String(dt.isoformat(),
1021
variant_level=variant_level)
1617
1024
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1978
1377
server to mandos-client
1982
1381
# Rejected - signal
1983
1382
@dbus.service.signal(_interface, signature="s")
1984
1383
def Rejected(self, reason):
1988
1387
# NeedApproval - signal
1989
1388
@dbus.service.signal(_interface, signature="tb")
1990
1389
def NeedApproval(self, timeout, default):
1992
1391
return self.need_approval()
1996
1395
# Approve - method
1997
1396
@dbus.service.method(_interface, in_signature="b")
1998
1397
def Approve(self, value):
1999
1398
self.approve(value)
2001
1400
# CheckedOK - method
2002
1401
@dbus.service.method(_interface)
2003
1402
def CheckedOK(self):
2004
1403
self.checked_ok()
2006
1405
# Enable - method
2007
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2008
1406
@dbus.service.method(_interface)
2009
1407
def Enable(self):
2013
1411
# StartChecker - method
2014
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2015
1412
@dbus.service.method(_interface)
2016
1413
def StartChecker(self):
2018
1415
self.start_checker()
2020
1417
# Disable - method
2021
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2022
1418
@dbus.service.method(_interface)
2023
1419
def Disable(self):
2027
1423
# StopChecker - method
2028
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2029
1424
@dbus.service.method(_interface)
2030
1425
def StopChecker(self):
2031
1426
self.stop_checker()
2035
1430
# ApprovalPending - property
2036
1431
@dbus_service_property(_interface, signature="b", access="read")
2037
1432
def ApprovalPending_dbus_property(self):
2038
1433
return dbus.Boolean(bool(self.approvals_pending))
2040
1435
# ApprovedByDefault - property
2041
@dbus_service_property(_interface,
1436
@dbus_service_property(_interface, signature="b",
2043
1437
access="readwrite")
2044
1438
def ApprovedByDefault_dbus_property(self, value=None):
2045
1439
if value is None: # get
2046
1440
return dbus.Boolean(self.approved_by_default)
2047
1441
self.approved_by_default = bool(value)
2049
1443
# ApprovalDelay - property
2050
@dbus_service_property(_interface,
1444
@dbus_service_property(_interface, signature="t",
2052
1445
access="readwrite")
2053
1446
def ApprovalDelay_dbus_property(self, value=None):
2054
1447
if value is None: # get
2055
return dbus.UInt64(self.approval_delay.total_seconds()
1448
return dbus.UInt64(self.approval_delay_milliseconds())
2057
1449
self.approval_delay = datetime.timedelta(0, 0, 0, value)
2059
1451
# ApprovalDuration - property
2060
@dbus_service_property(_interface,
1452
@dbus_service_property(_interface, signature="t",
2062
1453
access="readwrite")
2063
1454
def ApprovalDuration_dbus_property(self, value=None):
2064
1455
if value is None: # get
2065
return dbus.UInt64(self.approval_duration.total_seconds()
1456
return dbus.UInt64(timedelta_to_milliseconds(
1457
self.approval_duration))
2067
1458
self.approval_duration = datetime.timedelta(0, 0, 0, value)
2069
1460
# Name - property
2071
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2072
1461
@dbus_service_property(_interface, signature="s", access="read")
2073
1462
def Name_dbus_property(self):
2074
1463
return dbus.String(self.name)
2078
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2079
@dbus_service_property(_interface, signature="s", access="read")
2080
def KeyID_dbus_property(self):
2081
return dbus.String(self.key_id)
2083
1465
# Fingerprint - property
2085
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2086
1466
@dbus_service_property(_interface, signature="s", access="read")
2087
1467
def Fingerprint_dbus_property(self):
2088
1468
return dbus.String(self.fingerprint)
2090
1470
# Host - property
2091
@dbus_service_property(_interface,
1471
@dbus_service_property(_interface, signature="s",
2093
1472
access="readwrite")
2094
1473
def Host_dbus_property(self, value=None):
2095
1474
if value is None: # get
2096
1475
return dbus.String(self.host)
2097
self.host = str(value)
1476
self.host = unicode(value)
2099
1478
# Created - property
2101
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2102
1479
@dbus_service_property(_interface, signature="s", access="read")
2103
1480
def Created_dbus_property(self):
2104
1481
return datetime_to_dbus(self.created)
2106
1483
# LastEnabled - property
2107
1484
@dbus_service_property(_interface, signature="s", access="read")
2108
1485
def LastEnabled_dbus_property(self):
2109
1486
return datetime_to_dbus(self.last_enabled)
2111
1488
# Enabled - property
2112
@dbus_service_property(_interface,
1489
@dbus_service_property(_interface, signature="b",
2114
1490
access="readwrite")
2115
1491
def Enabled_dbus_property(self, value=None):
2116
1492
if value is None: # get
2123
1499
# LastCheckedOK - property
2124
@dbus_service_property(_interface,
1500
@dbus_service_property(_interface, signature="s",
2126
1501
access="readwrite")
2127
1502
def LastCheckedOK_dbus_property(self, value=None):
2128
1503
if value is not None:
2129
1504
self.checked_ok()
2131
1506
return datetime_to_dbus(self.last_checked_ok)
2133
1508
# LastCheckerStatus - property
2134
@dbus_service_property(_interface, signature="n", access="read")
1509
@dbus_service_property(_interface, signature="n",
2135
1511
def LastCheckerStatus_dbus_property(self):
2136
1512
return dbus.Int16(self.last_checker_status)
2138
1514
# Expires - property
2139
1515
@dbus_service_property(_interface, signature="s", access="read")
2140
1516
def Expires_dbus_property(self):
2141
1517
return datetime_to_dbus(self.expires)
2143
1519
# LastApprovalRequest - property
2144
1520
@dbus_service_property(_interface, signature="s", access="read")
2145
1521
def LastApprovalRequest_dbus_property(self):
2146
1522
return datetime_to_dbus(self.last_approval_request)
2148
1524
# Timeout - property
2149
@dbus_service_property(_interface,
1525
@dbus_service_property(_interface, signature="t",
2151
1526
access="readwrite")
2152
1527
def Timeout_dbus_property(self, value=None):
2153
1528
if value is None: # get
2154
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2155
old_timeout = self.timeout
1529
return dbus.UInt64(self.timeout_milliseconds())
2156
1530
self.timeout = datetime.timedelta(0, 0, 0, value)
2157
# Reschedule disabling
1531
# Reschedule timeout
2158
1532
if self.enabled:
2159
1533
now = datetime.datetime.utcnow()
2160
self.expires += self.timeout - old_timeout
2161
if self.expires <= now:
1534
time_to_die = timedelta_to_milliseconds(
1535
(self.last_checked_ok + self.timeout) - now)
1536
if time_to_die <= 0:
2162
1537
# The timeout has passed
1540
self.expires = (now +
1541
datetime.timedelta(milliseconds =
2165
1543
if (getattr(self, "disable_initiator_tag", None)
2168
GLib.source_remove(self.disable_initiator_tag)
2169
self.disable_initiator_tag = GLib.timeout_add(
2170
int((self.expires - now).total_seconds() * 1000),
1546
gobject.source_remove(self.disable_initiator_tag)
1547
self.disable_initiator_tag = (gobject.timeout_add
2173
1551
# ExtendedTimeout - property
2174
@dbus_service_property(_interface,
1552
@dbus_service_property(_interface, signature="t",
2176
1553
access="readwrite")
2177
1554
def ExtendedTimeout_dbus_property(self, value=None):
2178
1555
if value is None: # get
2179
return dbus.UInt64(self.extended_timeout.total_seconds()
1556
return dbus.UInt64(self.extended_timeout_milliseconds())
2181
1557
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2183
1559
# Interval - property
2184
@dbus_service_property(_interface,
1560
@dbus_service_property(_interface, signature="t",
2186
1561
access="readwrite")
2187
1562
def Interval_dbus_property(self, value=None):
2188
1563
if value is None: # get
2189
return dbus.UInt64(self.interval.total_seconds() * 1000)
1564
return dbus.UInt64(self.interval_milliseconds())
2190
1565
self.interval = datetime.timedelta(0, 0, 0, value)
2191
1566
if getattr(self, "checker_initiator_tag", None) is None:
2193
1568
if self.enabled:
2194
1569
# Reschedule checker run
2195
GLib.source_remove(self.checker_initiator_tag)
2196
self.checker_initiator_tag = GLib.timeout_add(
2197
value, self.start_checker)
2198
self.start_checker() # Start one now, too
1570
gobject.source_remove(self.checker_initiator_tag)
1571
self.checker_initiator_tag = (gobject.timeout_add
1572
(value, self.start_checker))
1573
self.start_checker() # Start one now, too
2200
1575
# Checker - property
2201
@dbus_service_property(_interface,
1576
@dbus_service_property(_interface, signature="s",
2203
1577
access="readwrite")
2204
1578
def Checker_dbus_property(self, value=None):
2205
1579
if value is None: # get
2206
1580
return dbus.String(self.checker_command)
2207
self.checker_command = str(value)
1581
self.checker_command = unicode(value)
2209
1583
# CheckerRunning - property
2210
@dbus_service_property(_interface,
1584
@dbus_service_property(_interface, signature="b",
2212
1585
access="readwrite")
2213
1586
def CheckerRunning_dbus_property(self, value=None):
2214
1587
if value is None: # get
2271
1634
class ClientHandler(socketserver.BaseRequestHandler, object):
2272
1635
"""A class to handle client connections.
2274
1637
Instantiated once for each connection to handle it.
2275
1638
Note: This will run in its own forked process."""
2277
1640
def handle(self):
2278
1641
with contextlib.closing(self.server.child_pipe) as child_pipe:
2279
1642
logger.info("TCP connection from: %s",
2280
str(self.client_address))
1643
unicode(self.client_address))
2281
1644
logger.debug("Pipe FD: %d",
2282
1645
self.server.child_pipe.fileno())
2284
session = gnutls.ClientSession(self.request)
2286
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2287
# "+AES-256-CBC", "+SHA1",
2288
# "+COMP-NULL", "+CTYPE-OPENPGP",
1647
session = (gnutls.connection
1648
.ClientSession(self.request,
1650
.X509Credentials()))
1652
# Note: gnutls.connection.X509Credentials is really a
1653
# generic GnuTLS certificate credentials object so long as
1654
# no X.509 keys are added to it. Therefore, we can use it
1655
# here despite using OpenPGP certificates.
1657
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1658
# "+AES-256-CBC", "+SHA1",
1659
# "+COMP-NULL", "+CTYPE-OPENPGP",
2290
1661
# Use a fallback default, since this MUST be set.
2291
1662
priority = self.server.gnutls_priority
2292
1663
if priority is None:
2293
1664
priority = "NORMAL"
2294
gnutls.priority_set_direct(session._c_object,
2295
priority.encode("utf-8"),
1665
(gnutls.library.functions
1666
.gnutls_priority_set_direct(session._c_object,
2298
1669
# Start communication using the Mandos protocol
2299
1670
# Get protocol number
2300
1671
line = self.request.makefile().readline()
2301
1672
logger.debug("Protocol version: %r", line)
2303
1674
if int(line.strip().split()[0]) > 1:
2304
raise RuntimeError(line)
2305
1676
except (ValueError, IndexError, RuntimeError) as error:
2306
1677
logger.error("Unknown protocol version: %s", error)
2309
1680
# Start GnuTLS connection
2311
1682
session.handshake()
2312
except gnutls.Error as error:
1683
except gnutls.errors.GNUTLSError as error:
2313
1684
logger.warning("Handshake failed: %s", error)
2314
1685
# Do not run session.bye() here: the session is not
2315
1686
# established. Just abandon the request.
2317
1688
logger.debug("Handshake succeeded")
2319
1690
approval_required = False
2321
if gnutls.has_rawpk:
2324
key_id = self.key_id(
2325
self.peer_certificate(session))
2326
except (TypeError, gnutls.Error) as error:
2327
logger.warning("Bad certificate: %s", error)
2329
logger.debug("Key ID: %s", key_id)
2334
fpr = self.fingerprint(
2335
self.peer_certificate(session))
2336
except (TypeError, gnutls.Error) as error:
2337
logger.warning("Bad certificate: %s", error)
2339
logger.debug("Fingerprint: %s", fpr)
2342
client = ProxyClient(child_pipe, key_id, fpr,
1693
fpr = self.fingerprint(self.peer_certificate
1696
gnutls.errors.GNUTLSError) as error:
1697
logger.warning("Bad certificate: %s", error)
1699
logger.debug("Fingerprint: %s", fpr)
1702
client = ProxyClient(child_pipe, fpr,
2343
1703
self.client_address)
2344
1704
except KeyError:
2347
1707
if client.approval_delay:
2348
1708
delay = client.approval_delay
2349
1709
client.approvals_pending += 1
2350
1710
approval_required = True
2353
1713
if not client.enabled:
2354
1714
logger.info("Client %s is disabled",
2356
1716
if self.server.use_dbus:
2357
1717
# Emit D-Bus signal
2358
1718
client.Rejected("Disabled")
2361
1721
if client.approved or not client.approval_delay:
2362
# We are approved or approval is disabled
1722
#We are approved or approval is disabled
2364
1724
elif client.approved is None:
2365
1725
logger.info("Client %s needs approval",
2398
1760
delay -= time2 - time
2401
session.send(client.secret)
2402
except gnutls.Error as error:
2403
logger.warning("gnutls send failed",
1763
while sent_size < len(client.secret):
1765
sent = session.send(client.secret[sent_size:])
1766
except gnutls.errors.GNUTLSError as error:
1767
logger.warning("gnutls send failed",
1770
logger.debug("Sent: %d, remaining: %d",
1771
sent, len(client.secret)
1772
- (sent_size + sent))
2407
1775
logger.info("Sending secret to %s", client.name)
2408
1776
# bump the timeout using extended_timeout
2409
1777
client.bump_timeout(client.extended_timeout)
2410
1778
if self.server.use_dbus:
2411
1779
# Emit D-Bus signal
2412
1780
client.GotSecret()
2415
1783
if approval_required:
2416
1784
client.approvals_pending -= 1
2419
except gnutls.Error as error:
1787
except gnutls.errors.GNUTLSError as error:
2420
1788
logger.warning("GnuTLS bye failed",
2421
1789
exc_info=error)
2424
1792
def peer_certificate(session):
2425
"Return the peer's certificate as a bytestring"
2427
cert_type = gnutls.certificate_type_get2(session._c_object,
2429
except AttributeError:
2430
cert_type = gnutls.certificate_type_get(session._c_object)
2431
if gnutls.has_rawpk:
2432
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2434
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2435
# If not a valid certificate type...
2436
if cert_type not in valid_cert_types:
2437
logger.info("Cert type %r not in %r", cert_type,
2439
# ...return invalid data
1793
"Return the peer's OpenPGP certificate as a bytestring"
1794
# If not an OpenPGP certificate...
1795
if (gnutls.library.functions
1796
.gnutls_certificate_type_get(session._c_object)
1797
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1798
# ...do the normal thing
1799
return session.peer_certificate
2441
1800
list_size = ctypes.c_uint(1)
2442
cert_list = (gnutls.certificate_get_peers
1801
cert_list = (gnutls.library.functions
1802
.gnutls_certificate_get_peers
2443
1803
(session._c_object, ctypes.byref(list_size)))
2444
1804
if not bool(cert_list) and list_size.value != 0:
2445
raise gnutls.Error("error getting peer certificate")
1805
raise gnutls.errors.GNUTLSError("error getting peer"
2446
1807
if list_size.value == 0:
2448
1809
cert = cert_list[0]
2449
1810
return ctypes.string_at(cert.data, cert.size)
2452
def key_id(certificate):
2453
"Convert a certificate bytestring to a hexdigit key ID"
2454
# New GnuTLS "datum" with the public key
2455
datum = gnutls.datum_t(
2456
ctypes.cast(ctypes.c_char_p(certificate),
2457
ctypes.POINTER(ctypes.c_ubyte)),
2458
ctypes.c_uint(len(certificate)))
2459
# XXX all these need to be created in the gnutls "module"
2460
# New empty GnuTLS certificate
2461
pubkey = gnutls.pubkey_t()
2462
gnutls.pubkey_init(ctypes.byref(pubkey))
2463
# Import the raw public key into the certificate
2464
gnutls.pubkey_import(pubkey,
2465
ctypes.byref(datum),
2466
gnutls.X509_FMT_DER)
2467
# New buffer for the key ID
2468
buf = ctypes.create_string_buffer(32)
2469
buf_len = ctypes.c_size_t(len(buf))
2470
# Get the key ID from the raw public key into the buffer
2471
gnutls.pubkey_get_key_id(pubkey,
2472
gnutls.KEYID_USE_SHA256,
2473
ctypes.cast(ctypes.byref(buf),
2474
ctypes.POINTER(ctypes.c_ubyte)),
2475
ctypes.byref(buf_len))
2476
# Deinit the certificate
2477
gnutls.pubkey_deinit(pubkey)
2479
# Convert the buffer to a Python bytestring
2480
key_id = ctypes.string_at(buf, buf_len.value)
2481
# Convert the bytestring to hexadecimal notation
2482
hex_key_id = binascii.hexlify(key_id).upper()
2486
1813
def fingerprint(openpgp):
2487
1814
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2488
1815
# New GnuTLS "datum" with the OpenPGP public key
2489
datum = gnutls.datum_t(
2490
ctypes.cast(ctypes.c_char_p(openpgp),
2491
ctypes.POINTER(ctypes.c_ubyte)),
2492
ctypes.c_uint(len(openpgp)))
1816
datum = (gnutls.library.types
1817
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1820
ctypes.c_uint(len(openpgp))))
2493
1821
# New empty GnuTLS certificate
2494
crt = gnutls.openpgp_crt_t()
2495
gnutls.openpgp_crt_init(ctypes.byref(crt))
1822
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1823
(gnutls.library.functions
1824
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2496
1825
# Import the OpenPGP public key into the certificate
2497
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2498
gnutls.OPENPGP_FMT_RAW)
1826
(gnutls.library.functions
1827
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1828
gnutls.library.constants
1829
.GNUTLS_OPENPGP_FMT_RAW))
2499
1830
# Verify the self signature in the key
2500
1831
crtverify = ctypes.c_uint()
2501
gnutls.openpgp_crt_verify_self(crt, 0,
2502
ctypes.byref(crtverify))
1832
(gnutls.library.functions
1833
.gnutls_openpgp_crt_verify_self(crt, 0,
1834
ctypes.byref(crtverify)))
2503
1835
if crtverify.value != 0:
2504
gnutls.openpgp_crt_deinit(crt)
2505
raise gnutls.CertificateSecurityError(code
1836
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1837
raise (gnutls.errors.CertificateSecurityError
2507
1839
# New buffer for the fingerprint
2508
1840
buf = ctypes.create_string_buffer(20)
2509
1841
buf_len = ctypes.c_size_t()
2510
1842
# Get the fingerprint from the certificate into the buffer
2511
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2512
ctypes.byref(buf_len))
1843
(gnutls.library.functions
1844
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1845
ctypes.byref(buf_len)))
2513
1846
# Deinit the certificate
2514
gnutls.openpgp_crt_deinit(crt)
1847
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2515
1848
# Convert the buffer to a Python bytestring
2516
1849
fpr = ctypes.string_at(buf, buf_len.value)
2517
1850
# Convert the bytestring to hexadecimal notation
2522
class MultiprocessingMixIn:
1855
class MultiprocessingMixIn(object):
2523
1856
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2525
1857
def sub_process_main(self, request, address):
2527
1859
self.finish_request(request, address)
2528
1860
except Exception:
2529
1861
self.handle_error(request, address)
2530
1862
self.close_request(request)
2532
1864
def process_request(self, request, address):
2533
1865
"""Start a new process to process the request."""
2534
proc = multiprocessing.Process(target=self.sub_process_main,
2535
args=(request, address))
1866
proc = multiprocessing.Process(target = self.sub_process_main,
2540
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
1873
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2541
1874
""" adds a pipe to the MixIn """
2543
1875
def process_request(self, request, client_address):
2544
1876
"""Overrides and wraps the original process_request().
2546
1878
This function creates a new pipe in self.pipe
2548
1880
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2550
1882
proc = MultiprocessingMixIn.process_request(self, request,
2551
1883
client_address)
2552
1884
self.child_pipe.close()
2553
1885
self.add_pipe(parent_pipe, proc)
2555
1887
def add_pipe(self, parent_pipe, proc):
2556
1888
"""Dummy function; override as necessary"""
2557
raise NotImplementedError()
1889
raise NotImplementedError
2560
1892
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2561
socketserver.TCPServer):
1893
socketserver.TCPServer, object):
2562
1894
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2565
1897
enabled: Boolean; whether this server is activated yet
2566
1898
interface: None or a network interface name (string)
2567
1899
use_ipv6: Boolean; to use IPv6 or not
2570
1901
def __init__(self, server_address, RequestHandlerClass,
2574
"""If socketfd is set, use that file descriptor instead of
2575
creating a new one with socket.socket().
1902
interface=None, use_ipv6=True):
2577
1903
self.interface = interface
2579
1905
self.address_family = socket.AF_INET6
2580
if socketfd is not None:
2581
# Save the file descriptor
2582
self.socketfd = socketfd
2583
# Save the original socket.socket() function
2584
self.socket_socket = socket.socket
2586
# To implement --socket, we monkey patch socket.socket.
2588
# (When socketserver.TCPServer is a new-style class, we
2589
# could make self.socket into a property instead of monkey
2590
# patching socket.socket.)
2592
# Create a one-time-only replacement for socket.socket()
2593
@functools.wraps(socket.socket)
2594
def socket_wrapper(*args, **kwargs):
2595
# Restore original function so subsequent calls are
2597
socket.socket = self.socket_socket
2598
del self.socket_socket
2599
# This time only, return a new socket object from the
2600
# saved file descriptor.
2601
return socket.fromfd(self.socketfd, *args, **kwargs)
2602
# Replace socket.socket() function with wrapper
2603
socket.socket = socket_wrapper
2604
# The socketserver.TCPServer.__init__ will call
2605
# socket.socket(), which might be our replacement,
2606
# socket_wrapper(), if socketfd was set.
2607
1906
socketserver.TCPServer.__init__(self, server_address,
2608
1907
RequestHandlerClass)
2610
1908
def server_bind(self):
2611
1909
"""This overrides the normal server_bind() function
2612
1910
to bind to an interface if one was specified, and also NOT to
2613
1911
bind to an address or port if they were not specified."""
2614
global SO_BINDTODEVICE
2615
1912
if self.interface is not None:
2616
1913
if SO_BINDTODEVICE is None:
2617
# Fall back to a hard-coded value which seems to be
2619
logger.warning("SO_BINDTODEVICE not found, trying 25")
2620
SO_BINDTODEVICE = 25
2622
self.socket.setsockopt(
2623
socket.SOL_SOCKET, SO_BINDTODEVICE,
2624
(self.interface + "\0").encode("utf-8"))
2625
except socket.error as error:
2626
if error.errno == errno.EPERM:
2627
logger.error("No permission to bind to"
2628
" interface %s", self.interface)
2629
elif error.errno == errno.ENOPROTOOPT:
2630
logger.error("SO_BINDTODEVICE not available;"
2631
" cannot bind to interface %s",
2633
elif error.errno == errno.ENODEV:
2634
logger.error("Interface %s does not exist,"
2635
" cannot bind", self.interface)
1914
logger.error("SO_BINDTODEVICE does not exist;"
1915
" cannot bind to interface %s",
1919
self.socket.setsockopt(socket.SOL_SOCKET,
1923
except socket.error as error:
1924
if error[0] == errno.EPERM:
1925
logger.error("No permission to"
1926
" bind to interface %s",
1928
elif error[0] == errno.ENOPROTOOPT:
1929
logger.error("SO_BINDTODEVICE not available;"
1930
" cannot bind to interface %s",
2638
1934
# Only bind(2) the socket if we really need to.
2639
1935
if self.server_address[0] or self.server_address[1]:
2640
if self.server_address[1]:
2641
self.allow_reuse_address = True
2642
1936
if not self.server_address[0]:
2643
1937
if self.address_family == socket.AF_INET6:
2644
any_address = "::" # in6addr_any
1938
any_address = "::" # in6addr_any
2646
any_address = "0.0.0.0" # INADDR_ANY
1940
any_address = socket.INADDR_ANY
2647
1941
self.server_address = (any_address,
2648
1942
self.server_address[1])
2649
1943
elif not self.server_address[1]:
2650
self.server_address = (self.server_address[0], 0)
1944
self.server_address = (self.server_address[0],
2651
1946
# if self.interface:
2652
1947
# self.server_address = (self.server_address[0],
2683
1973
self.gnutls_priority = gnutls_priority
2684
1974
IPv6_TCPServer.__init__(self, server_address,
2685
1975
RequestHandlerClass,
2686
interface=interface,
1976
interface = interface,
1977
use_ipv6 = use_ipv6)
2690
1978
def server_activate(self):
2691
1979
if self.enabled:
2692
1980
return socketserver.TCPServer.server_activate(self)
2694
1982
def enable(self):
2695
1983
self.enabled = True
2697
1985
def add_pipe(self, parent_pipe, proc):
2698
1986
# Call "handle_ipc" for both data and EOF events
2700
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2701
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2702
functools.partial(self.handle_ipc,
2703
parent_pipe=parent_pipe,
2706
def handle_ipc(self, source, condition,
2709
client_object=None):
1987
gobject.io_add_watch(parent_pipe.fileno(),
1988
gobject.IO_IN | gobject.IO_HUP,
1989
functools.partial(self.handle_ipc,
1994
def handle_ipc(self, source, condition, parent_pipe=None,
1995
proc = None, client_object=None):
1997
gobject.IO_IN: "IN", # There is data to read.
1998
gobject.IO_OUT: "OUT", # Data can be written (without
2000
gobject.IO_PRI: "PRI", # There is urgent data to read.
2001
gobject.IO_ERR: "ERR", # Error condition.
2002
gobject.IO_HUP: "HUP" # Hung up (the connection has been
2003
# broken, usually for pipes and
2006
conditions_string = ' | '.join(name
2008
condition_names.iteritems()
2009
if cond & condition)
2710
2010
# error, or the other end of multiprocessing.Pipe has closed
2711
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2011
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2712
2012
# Wait for other process to exit
2716
2016
# Read a request from the child
2717
2017
request = parent_pipe.recv()
2718
2018
command = request[0]
2720
2020
if command == 'init':
2721
key_id = request[1].decode("ascii")
2722
fpr = request[2].decode("ascii")
2723
address = request[3]
2725
for c in self.clients.values():
2726
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2728
if key_id and c.key_id == key_id:
2731
if fpr and c.fingerprint == fpr:
2022
address = request[2]
2024
for c in self.clients.itervalues():
2025
if c.fingerprint == fpr:
2735
logger.info("Client not found for key ID: %s, address"
2736
": %s", key_id or fpr, address)
2029
logger.info("Client not found for fingerprint: %s, ad"
2030
"dress: %s", fpr, address)
2737
2031
if self.use_dbus:
2738
2032
# Emit D-Bus signal
2739
mandos_dbus_service.ClientNotFound(key_id or fpr,
2033
mandos_dbus_service.ClientNotFound(fpr,
2741
2035
parent_pipe.send(False)
2745
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2746
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2747
functools.partial(self.handle_ipc,
2748
parent_pipe=parent_pipe,
2750
client_object=client))
2038
gobject.io_add_watch(parent_pipe.fileno(),
2039
gobject.IO_IN | gobject.IO_HUP,
2040
functools.partial(self.handle_ipc,
2751
2046
parent_pipe.send(True)
2752
2047
# remove the old hook in favor of the new above hook on
2756
2051
funcname = request[1]
2757
2052
args = request[2]
2758
2053
kwargs = request[3]
2760
2055
parent_pipe.send(('data', getattr(client_object,
2761
2056
funcname)(*args,
2764
2059
if command == 'getattr':
2765
2060
attrname = request[1]
2766
if isinstance(client_object.__getattribute__(attrname),
2767
collections.abc.Callable):
2768
parent_pipe.send(('function', ))
2061
if callable(client_object.__getattribute__(attrname)):
2062
parent_pipe.send(('function',))
2771
'data', client_object.__getattribute__(attrname)))
2064
parent_pipe.send(('data', client_object
2065
.__getattribute__(attrname)))
2773
2067
if command == 'setattr':
2774
2068
attrname = request[1]
2775
2069
value = request[2]
2776
2070
setattr(client_object, attrname, value)
2781
def rfc3339_duration_to_delta(duration):
2782
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2784
>>> rfc3339_duration_to_delta("P7D") == datetime.timedelta(7)
2786
>>> rfc3339_duration_to_delta("PT60S") == datetime.timedelta(0, 60)
2788
>>> rfc3339_duration_to_delta("PT60M") == datetime.timedelta(0, 3600)
2790
>>> rfc3339_duration_to_delta("PT24H") == datetime.timedelta(1)
2792
>>> rfc3339_duration_to_delta("P1W") == datetime.timedelta(7)
2794
>>> rfc3339_duration_to_delta("PT5M30S") == datetime.timedelta(0, 330)
2796
>>> rfc3339_duration_to_delta("P1DT3M20S") == datetime.timedelta(1, 200)
2800
# Parsing an RFC 3339 duration with regular expressions is not
2801
# possible - there would have to be multiple places for the same
2802
# values, like seconds. The current code, while more esoteric, is
2803
# cleaner without depending on a parsing library. If Python had a
2804
# built-in library for parsing we would use it, but we'd like to
2805
# avoid excessive use of external libraries.
2807
# New type for defining tokens, syntax, and semantics all-in-one
2808
Token = collections.namedtuple("Token", (
2809
"regexp", # To match token; if "value" is not None, must have
2810
# a "group" containing digits
2811
"value", # datetime.timedelta or None
2812
"followers")) # Tokens valid after this token
2813
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2814
# the "duration" ABNF definition in RFC 3339, Appendix A.
2815
token_end = Token(re.compile(r"$"), None, frozenset())
2816
token_second = Token(re.compile(r"(\d+)S"),
2817
datetime.timedelta(seconds=1),
2818
frozenset((token_end, )))
2819
token_minute = Token(re.compile(r"(\d+)M"),
2820
datetime.timedelta(minutes=1),
2821
frozenset((token_second, token_end)))
2822
token_hour = Token(re.compile(r"(\d+)H"),
2823
datetime.timedelta(hours=1),
2824
frozenset((token_minute, token_end)))
2825
token_time = Token(re.compile(r"T"),
2827
frozenset((token_hour, token_minute,
2829
token_day = Token(re.compile(r"(\d+)D"),
2830
datetime.timedelta(days=1),
2831
frozenset((token_time, token_end)))
2832
token_month = Token(re.compile(r"(\d+)M"),
2833
datetime.timedelta(weeks=4),
2834
frozenset((token_day, token_end)))
2835
token_year = Token(re.compile(r"(\d+)Y"),
2836
datetime.timedelta(weeks=52),
2837
frozenset((token_month, token_end)))
2838
token_week = Token(re.compile(r"(\d+)W"),
2839
datetime.timedelta(weeks=1),
2840
frozenset((token_end, )))
2841
token_duration = Token(re.compile(r"P"), None,
2842
frozenset((token_year, token_month,
2843
token_day, token_time,
2845
# Define starting values:
2847
value = datetime.timedelta()
2849
# Following valid tokens
2850
followers = frozenset((token_duration, ))
2851
# String left to parse
2853
# Loop until end token is found
2854
while found_token is not token_end:
2855
# Search for any currently valid tokens
2856
for token in followers:
2857
match = token.regexp.match(s)
2858
if match is not None:
2860
if token.value is not None:
2861
# Value found, parse digits
2862
factor = int(match.group(1), 10)
2863
# Add to value so far
2864
value += factor * token.value
2865
# Strip token from string
2866
s = token.regexp.sub("", s, 1)
2869
# Set valid next tokens
2870
followers = found_token.followers
2873
# No currently valid tokens were found
2874
raise ValueError("Invalid RFC 3339 duration: {!r}"
2880
2075
def string_to_delta(interval):
2881
2076
"""Parse a string and return a datetime.timedelta
2883
>>> string_to_delta('7d') == datetime.timedelta(7)
2885
>>> string_to_delta('60s') == datetime.timedelta(0, 60)
2887
>>> string_to_delta('60m') == datetime.timedelta(0, 3600)
2889
>>> string_to_delta('24h') == datetime.timedelta(1)
2891
>>> string_to_delta('1w') == datetime.timedelta(7)
2893
>>> string_to_delta('5m 30s') == datetime.timedelta(0, 330)
2078
>>> string_to_delta('7d')
2079
datetime.timedelta(7)
2080
>>> string_to_delta('60s')
2081
datetime.timedelta(0, 60)
2082
>>> string_to_delta('60m')
2083
datetime.timedelta(0, 3600)
2084
>>> string_to_delta('24h')
2085
datetime.timedelta(1)
2086
>>> string_to_delta('1w')
2087
datetime.timedelta(7)
2088
>>> string_to_delta('5m 30s')
2089
datetime.timedelta(0, 330)
2898
return rfc3339_duration_to_delta(interval)
2902
2091
timevalue = datetime.timedelta(0)
2903
2092
for s in interval.split():
2094
suffix = unicode(s[-1])
2906
2095
value = int(s[:-1])
2907
2096
if suffix == "d":
2908
2097
delta = datetime.timedelta(value)
2980
2170
parser.add_argument("--no-dbus", action="store_false",
2981
2171
dest="use_dbus", help="Do not provide D-Bus"
2982
" system bus interface", default=None)
2172
" system bus interface")
2983
2173
parser.add_argument("--no-ipv6", action="store_false",
2984
dest="use_ipv6", help="Do not use IPv6",
2174
dest="use_ipv6", help="Do not use IPv6")
2986
2175
parser.add_argument("--no-restore", action="store_false",
2987
2176
dest="restore", help="Do not restore stored"
2988
" state", default=None)
2989
parser.add_argument("--socket", type=int,
2990
help="Specify a file descriptor to a network"
2991
" socket to use instead of creating one")
2992
2178
parser.add_argument("--statedir", metavar="DIR",
2993
2179
help="Directory to save/restore state in")
2994
parser.add_argument("--foreground", action="store_true",
2995
help="Run in foreground", default=None)
2996
parser.add_argument("--no-zeroconf", action="store_false",
2997
dest="zeroconf", help="Do not use Zeroconf",
3000
2181
options = parser.parse_args()
3002
2188
# Default values for config file for server-global settings
3003
if gnutls.has_rawpk:
3004
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
3005
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
3007
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
3008
":+SIGN-DSA-SHA256")
3009
server_defaults = {"interface": "",
3013
"priority": priority,
3014
"servicename": "Mandos",
3020
"statedir": "/var/lib/mandos",
3021
"foreground": "False",
2189
server_defaults = { "interface": "",
2194
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2195
"servicename": "Mandos",
2200
"statedir": "/var/lib/mandos"
3026
2203
# Parse config file for server-global settings
3027
server_config = configparser.ConfigParser(server_defaults)
2204
server_config = configparser.SafeConfigParser(server_defaults)
3028
2205
del server_defaults
3029
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3030
# Convert the ConfigParser object to a dict
2206
server_config.read(os.path.join(options.configdir,
2208
# Convert the SafeConfigParser object to a dict
3031
2209
server_settings = server_config.defaults()
3032
2210
# Use the appropriate methods on the non-string config options
3033
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3034
"foreground", "zeroconf"):
2211
for option in ("debug", "use_dbus", "use_ipv6"):
3035
2212
server_settings[option] = server_config.getboolean("DEFAULT",
3037
2214
if server_settings["port"]:
3038
2215
server_settings["port"] = server_config.getint("DEFAULT",
3040
if server_settings["socket"]:
3041
server_settings["socket"] = server_config.getint("DEFAULT",
3043
# Later, stdin will, and stdout and stderr might, be dup'ed
3044
# over with an opened os.devnull. But we don't want this to
3045
# happen with a supplied network socket.
3046
if 0 <= server_settings["socket"] <= 2:
3047
server_settings["socket"] = os.dup(server_settings
3049
2217
del server_config
3051
2219
# Override the settings from the config file with command line
3052
2220
# options, if set.
3053
2221
for option in ("interface", "address", "port", "debug",
3054
"priority", "servicename", "configdir", "use_dbus",
3055
"use_ipv6", "debuglevel", "restore", "statedir",
3056
"socket", "foreground", "zeroconf"):
2222
"priority", "servicename", "configdir",
2223
"use_dbus", "use_ipv6", "debuglevel", "restore",
3057
2225
value = getattr(options, option)
3058
2226
if value is not None:
3059
2227
server_settings[option] = value
3061
2229
# Force all strings to be unicode
3062
2230
for option in server_settings.keys():
3063
if isinstance(server_settings[option], bytes):
3064
server_settings[option] = (server_settings[option]
3066
# Force all boolean options to be boolean
3067
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3068
"foreground", "zeroconf"):
3069
server_settings[option] = bool(server_settings[option])
3070
# Debug implies foreground
3071
if server_settings["debug"]:
3072
server_settings["foreground"] = True
2231
if type(server_settings[option]) is str:
2232
server_settings[option] = unicode(server_settings[option])
3073
2233
# Now we have our good server settings in "server_settings"
3075
2235
##################################################################
3077
if (not server_settings["zeroconf"]
3078
and not (server_settings["port"]
3079
or server_settings["socket"] != "")):
3080
parser.error("Needs port or socket to work without Zeroconf")
3082
2237
# For convenience
3083
2238
debug = server_settings["debug"]
3084
2239
debuglevel = server_settings["debuglevel"]
3153
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3155
2300
except OSError as error:
3156
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3157
.format(uid, gid, os.strerror(error.errno)))
3158
if error.errno != errno.EPERM:
2301
if error[0] != errno.EPERM:
3162
2305
# Enable all possible GnuTLS debugging
3164
2307
# "Use a log level over 10 to enable all debugging options."
3165
2308
# - GnuTLS manual
3166
gnutls.global_set_log_level(11)
2309
gnutls.library.functions.gnutls_global_set_log_level(11)
2311
@gnutls.library.types.gnutls_log_func
3169
2312
def debug_gnutls(level, string):
3170
2313
logger.debug("GnuTLS: %s", string[:-1])
3172
gnutls.global_set_log_function(debug_gnutls)
2315
(gnutls.library.functions
2316
.gnutls_global_set_log_function(debug_gnutls))
3174
2318
# Redirect stdin so all checkers get /dev/null
3175
2319
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
3176
2320
os.dup2(null, sys.stdin.fileno())
3180
2324
# Need to fork before connecting to D-Bus
3182
2326
# Close all input and output, do double fork, etc.
3185
if gi.version_info < (3, 10, 2):
3186
# multiprocessing will use threads, so before we use GLib we
3187
# need to inform GLib that threads will be used.
2329
gobject.threads_init()
3190
2331
global main_loop
3191
2332
# From the Avahi example code
3192
2333
DBusGMainLoop(set_as_default=True)
3193
main_loop = GLib.MainLoop()
2334
main_loop = gobject.MainLoop()
3194
2335
bus = dbus.SystemBus()
3195
2336
# End of Avahi example code
3198
2339
bus_name = dbus.service.BusName("se.recompile.Mandos",
3201
old_bus_name = dbus.service.BusName(
3202
"se.bsnet.fukt.Mandos", bus,
3204
except dbus.exceptions.DBusException as e:
2340
bus, do_not_queue=True)
2341
old_bus_name = (dbus.service.BusName
2342
("se.bsnet.fukt.Mandos", bus,
2344
except dbus.exceptions.NameExistsException as e:
3205
2345
logger.error("Disabling D-Bus:", exc_info=e)
3206
2346
use_dbus = False
3207
2347
server_settings["use_dbus"] = False
3208
2348
tcp_server.use_dbus = False
3210
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3211
service = AvahiServiceToSyslog(
3212
name=server_settings["servicename"],
3213
servicetype="_mandos._tcp",
3216
if server_settings["interface"]:
3217
service.interface = if_nametoindex(
3218
server_settings["interface"].encode("utf-8"))
2349
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2350
service = AvahiServiceToSyslog(name =
2351
server_settings["servicename"],
2352
servicetype = "_mandos._tcp",
2353
protocol = protocol, bus = bus)
2354
if server_settings["interface"]:
2355
service.interface = (if_nametoindex
2356
(str(server_settings["interface"])))
3220
2358
global multiprocessing_manager
3221
2359
multiprocessing_manager = multiprocessing.Manager()
3223
2361
client_class = Client
3225
client_class = functools.partial(ClientDBus, bus=bus)
2363
client_class = functools.partial(ClientDBus, bus = bus)
3227
2365
client_settings = Client.config_parser(client_config)
3228
2366
old_client_settings = {}
3229
2367
clients_data = {}
3231
# This is used to redirect stdout and stderr for checker processes
3233
wnull = open(os.devnull, "w") # A writable /dev/null
3234
# Only used if server is running in foreground but not in debug
3236
if debug or not foreground:
3239
2369
# Get client data and settings from last running state.
3240
2370
if server_settings["restore"]:
3242
2372
with open(stored_state_path, "rb") as stored_state:
3243
if sys.version_info.major == 2:
3244
clients_data, old_client_settings = pickle.load(
3247
bytes_clients_data, bytes_old_client_settings = (
3248
pickle.load(stored_state, encoding="bytes"))
3249
# Fix bytes to strings
3252
clients_data = {(key.decode("utf-8")
3253
if isinstance(key, bytes)
3256
bytes_clients_data.items()}
3257
del bytes_clients_data
3258
for key in clients_data:
3259
value = {(k.decode("utf-8")
3260
if isinstance(k, bytes) else k): v
3262
clients_data[key].items()}
3263
clients_data[key] = value
3265
value["client_structure"] = [
3267
if isinstance(s, bytes)
3269
value["client_structure"]]
3270
# .name, .host, and .checker_command
3271
for k in ("name", "host", "checker_command"):
3272
if isinstance(value[k], bytes):
3273
value[k] = value[k].decode("utf-8")
3274
if "key_id" not in value:
3275
value["key_id"] = ""
3276
elif "fingerprint" not in value:
3277
value["fingerprint"] = ""
3278
# old_client_settings
3280
old_client_settings = {
3281
(key.decode("utf-8")
3282
if isinstance(key, bytes)
3285
bytes_old_client_settings.items()}
3286
del bytes_old_client_settings
3287
# .host and .checker_command
3288
for value in old_client_settings.values():
3289
for attribute in ("host", "checker_command"):
3290
if isinstance(value[attribute], bytes):
3291
value[attribute] = (value[attribute]
2373
clients_data, old_client_settings = (pickle.load
3293
2375
os.remove(stored_state_path)
3294
2376
except IOError as e:
3295
2377
if e.errno == errno.ENOENT:
3296
logger.warning("Could not load persistent state:"
3297
" {}".format(os.strerror(e.errno)))
2378
logger.warning("Could not load persistent state: {0}"
2379
.format(os.strerror(e.errno)))
3299
2381
logger.critical("Could not load persistent state:",
3302
2384
except EOFError as e:
3303
2385
logger.warning("Could not load persistent state: "
2386
"EOFError:", exc_info=e)
3307
2388
with PGPEngine() as pgp:
3308
for client_name, client in clients_data.items():
3309
# Skip removed clients
3310
if client_name not in client_settings:
2389
for client_name, client in clients_data.iteritems():
3313
2390
# Decide which value to use after restoring saved state.
3314
2391
# We have three different values: Old config file,
3315
2392
# new config file, and saved state.
3373
2450
for client_name in (set(client_settings)
3374
2451
- set(old_client_settings)):
3375
2452
clients_data[client_name] = client_settings[client_name]
3377
2454
# Create all client objects
3378
for client_name, client in clients_data.items():
2455
for client_name, client in clients_data.iteritems():
3379
2456
tcp_server.clients[client_name] = client_class(
3382
server_settings=server_settings)
2457
name = client_name, settings = client)
3384
2459
if not tcp_server.clients:
3385
2460
logger.warning("No clients defined")
3388
if pidfile is not None:
3392
print(pid, file=pidfile)
3394
logger.error("Could not write to file %r with PID %d",
2466
pidfile.write(str(pid) + "\n".encode("utf-8"))
2469
logger.error("Could not write to file %r with PID %d",
2472
# "pidfile" was never created
3397
2474
del pidfilename
3399
for termsig in (signal.SIGHUP, signal.SIGTERM):
3400
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3401
lambda: main_loop.quit() and False)
2475
signal.signal(signal.SIGINT, signal.SIG_IGN)
2477
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2478
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3405
@alternate_dbus_interfaces(
3406
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3407
class MandosDBusService(DBusObjectWithObjectManager):
2481
@alternate_dbus_interfaces({"se.recompile.Mandos":
2482
"se.bsnet.fukt.Mandos"})
2483
class MandosDBusService(DBusObjectWithProperties):
3408
2484
"""A D-Bus proxy object"""
3410
2485
def __init__(self):
3411
2486
dbus.service.Object.__init__(self, bus, "/")
3413
2487
_interface = "se.recompile.Mandos"
2489
@dbus_interface_annotations(_interface)
2491
return { "org.freedesktop.DBus.Property"
2492
".EmitsChangedSignal":
3415
2495
@dbus.service.signal(_interface, signature="o")
3416
2496
def ClientAdded(self, objpath):
3420
2500
@dbus.service.signal(_interface, signature="ss")
3421
def ClientNotFound(self, key_id, address):
2501
def ClientNotFound(self, fingerprint, address):
3425
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3427
2505
@dbus.service.signal(_interface, signature="os")
3428
2506
def ClientRemoved(self, objpath, name):
3432
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3434
2510
@dbus.service.method(_interface, out_signature="ao")
3435
2511
def GetAllClients(self):
3437
return dbus.Array(c.dbus_object_path for c in
3438
tcp_server.clients.values())
3440
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2513
return dbus.Array(c.dbus_object_path
2515
tcp_server.clients.itervalues())
3442
2517
@dbus.service.method(_interface,
3443
2518
out_signature="a{oa{sv}}")
3444
2519
def GetAllClientsWithProperties(self):
3446
2521
return dbus.Dictionary(
3447
{c.dbus_object_path: c.GetAll(
3448
"se.recompile.Mandos.Client")
3449
for c in tcp_server.clients.values()},
2522
((c.dbus_object_path, c.GetAll(""))
2523
for c in tcp_server.clients.itervalues()),
3450
2524
signature="oa{sv}")
3452
2526
@dbus.service.method(_interface, in_signature="o")
3453
2527
def RemoveClient(self, object_path):
3455
for c in tcp_server.clients.values():
2529
for c in tcp_server.clients.itervalues():
3456
2530
if c.dbus_object_path == object_path:
3457
2531
del tcp_server.clients[c.name]
3458
2532
c.remove_from_connection()
3459
# Don't signal the disabling
2533
# Don't signal anything except ClientRemoved
3460
2534
c.disable(quiet=True)
3461
# Emit D-Bus signal for removal
3462
self.client_removed_signal(c)
2536
self.ClientRemoved(object_path, c.name)
3464
2538
raise KeyError(object_path)
3468
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3469
out_signature="a{oa{sa{sv}}}")
3470
def GetManagedObjects(self):
3472
return dbus.Dictionary(
3473
{client.dbus_object_path:
3475
{interface: client.GetAll(interface)
3477
client._get_all_interface_names()})
3478
for client in tcp_server.clients.values()})
3480
def client_added_signal(self, client):
3481
"""Send the new standard signal and the old signal"""
3483
# New standard signal
3484
self.InterfacesAdded(
3485
client.dbus_object_path,
3487
{interface: client.GetAll(interface)
3489
client._get_all_interface_names()}))
3491
self.ClientAdded(client.dbus_object_path)
3493
def client_removed_signal(self, client):
3494
"""Send the new standard signal and the old signal"""
3496
# New standard signal
3497
self.InterfacesRemoved(
3498
client.dbus_object_path,
3499
client._get_all_interface_names())
3501
self.ClientRemoved(client.dbus_object_path,
3504
2542
mandos_dbus_service = MandosDBusService()
3506
# Save modules to variables to exempt the modules from being
3507
# unloaded before the function registered with atexit() is run.
3508
mp = multiprocessing
3512
2545
"Cleanup function; run on exit"
3516
mp.active_children()
2548
multiprocessing.active_children()
3518
2549
if not (tcp_server.clients or client_settings):
3521
2552
# Store client before exiting. Secrets are encrypted with key
3522
2553
# based on what config file has. If config file is
3523
2554
# removed/edited, old secret will thus be unrecovable.
3525
2556
with PGPEngine() as pgp:
3526
for client in tcp_server.clients.values():
2557
for client in tcp_server.clients.itervalues():
3527
2558
key = client_settings[client.name]["secret"]
3528
2559
client.encrypted_secret = pgp.encrypt(client.secret,
3530
2561
client_dict = {}
3532
2563
# A list of attributes that can not be pickled
3534
exclude = {"bus", "changedstate", "secret",
3535
"checker", "server_settings"}
3536
for name, typ in inspect.getmembers(dbus.service
2565
exclude = set(("bus", "changedstate", "secret",
2567
for name, typ in (inspect.getmembers
2568
(dbus.service.Object)):
3538
2569
exclude.add(name)
3540
2571
client_dict["encrypted_secret"] = (client
3541
2572
.encrypted_secret)
3542
2573
for attr in client.client_structure:
3543
2574
if attr not in exclude:
3544
2575
client_dict[attr] = getattr(client, attr)
3546
2577
clients[client.name] = client_dict
3547
2578
del client_settings[client.name]["secret"]
3550
with tempfile.NamedTemporaryFile(
3554
dir=os.path.dirname(stored_state_path),
3555
delete=False) as stored_state:
3556
pickle.dump((clients, client_settings), stored_state,
3558
tempname = stored_state.name
2581
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2584
(stored_state_path))
2585
with os.fdopen(tempfd, "wb") as stored_state:
2586
pickle.dump((clients, client_settings), stored_state)
3559
2587
os.rename(tempname, stored_state_path)
3560
2588
except (IOError, OSError) as e: