65
import cPickle as pickle
70
import cPickle as pickle
66
73
import multiprocessing
73
82
import dbus.service
84
from gi.repository import GLib
76
85
from dbus.mainloop.glib import DBusGMainLoop
79
88
import xml.dom.minidom
91
# Try to find the value of SO_BINDTODEVICE:
93
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
94
# newer, and it is also the most natural place for it:
84
95
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
85
96
except AttributeError:
98
# This is where SO_BINDTODEVICE was up to and including Python
87
100
from IN import SO_BINDTODEVICE
88
101
except ImportError:
89
SO_BINDTODEVICE = None
102
# In Python 2.7 it seems to have been removed entirely.
103
# Try running the C preprocessor:
105
cc = subprocess.Popen(["cc", "--language=c", "-E",
107
stdin=subprocess.PIPE,
108
stdout=subprocess.PIPE)
109
stdout = cc.communicate(
110
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
111
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
112
except (OSError, ValueError, IndexError):
114
SO_BINDTODEVICE = None
116
if sys.version_info.major == 2:
119
if sys.version_info < (3, 2):
120
configparser.Configparser = configparser.SafeConfigParser
92
123
stored_state_file = "clients.pickle"
94
125
logger = logging.getLogger()
95
syslogger = (logging.handlers.SysLogHandler
96
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
97
address = str("/dev/log")))
100
if_nametoindex = (ctypes.cdll.LoadLibrary
101
(ctypes.util.find_library("c"))
129
if_nametoindex = ctypes.cdll.LoadLibrary(
130
ctypes.util.find_library("c")).if_nametoindex
103
131
except (OSError, AttributeError):
104
133
def if_nametoindex(interface):
105
134
"Get an interface index the hard way, i.e. using fcntl()"
106
135
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
107
136
with contextlib.closing(socket.socket()) as s:
108
137
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
109
struct.pack(str("16s16x"),
111
interface_index = struct.unpack(str("I"),
138
struct.pack(b"16s16x", interface))
139
interface_index = struct.unpack("I", ifreq[16:20])[0]
113
140
return interface_index
143
def copy_function(func):
144
"""Make a copy of a function"""
145
if sys.version_info.major == 2:
146
return types.FunctionType(func.func_code,
152
return types.FunctionType(func.__code__,
116
159
def initlogger(debug, level=logging.WARNING):
117
160
"""init logger and add loglevel"""
163
syslogger = (logging.handlers.SysLogHandler(
164
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
119
166
syslogger.setFormatter(logging.Formatter
120
167
('Mandos [%(process)d]: %(levelname)s:'
122
169
logger.addHandler(syslogger)
125
172
console = logging.StreamHandler()
126
173
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
171
230
os.rmdir(self.tempdir)
172
231
self.tempdir = None
174
233
def password_encode(self, password):
175
234
# Passphrase can not be empty and can not contain newlines or
176
235
# NUL bytes. So we prefix it and hex encode it.
177
return b"mandos" + binascii.hexlify(password)
236
encoded = b"mandos" + binascii.hexlify(password)
237
if len(encoded) > 2048:
238
# GnuPG can't handle long passwords, so encode differently
239
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
240
.replace(b"\n", b"\\n")
241
.replace(b"\0", b"\\x00"))
179
244
def encrypt(self, data, password):
180
self.gnupg.passphrase = self.password_encode(password)
181
with open(os.devnull, "w") as devnull:
183
proc = self.gnupg.run(['--symmetric'],
184
create_fhs=['stdin', 'stdout'],
185
attach_fhs={'stderr': devnull})
186
with contextlib.closing(proc.handles['stdin']) as f:
188
with contextlib.closing(proc.handles['stdout']) as f:
189
ciphertext = f.read()
193
self.gnupg.passphrase = None
245
passphrase = self.password_encode(password)
246
with tempfile.NamedTemporaryFile(
247
dir=self.tempdir) as passfile:
248
passfile.write(passphrase)
250
proc = subprocess.Popen([self.gpg, '--symmetric',
254
stdin=subprocess.PIPE,
255
stdout=subprocess.PIPE,
256
stderr=subprocess.PIPE)
257
ciphertext, err = proc.communicate(input=data)
258
if proc.returncode != 0:
194
260
return ciphertext
196
262
def decrypt(self, data, password):
197
self.gnupg.passphrase = self.password_encode(password)
198
with open(os.devnull, "w") as devnull:
200
proc = self.gnupg.run(['--decrypt'],
201
create_fhs=['stdin', 'stdout'],
202
attach_fhs={'stderr': devnull})
203
with contextlib.closing(proc.handles['stdin']) as f:
205
with contextlib.closing(proc.handles['stdout']) as f:
206
decrypted_plaintext = f.read()
210
self.gnupg.passphrase = None
263
passphrase = self.password_encode(password)
264
with tempfile.NamedTemporaryFile(
265
dir=self.tempdir) as passfile:
266
passfile.write(passphrase)
268
proc = subprocess.Popen([self.gpg, '--decrypt',
272
stdin=subprocess.PIPE,
273
stdout=subprocess.PIPE,
274
stderr=subprocess.PIPE)
275
decrypted_plaintext, err = proc.communicate(input=data)
276
if proc.returncode != 0:
211
278
return decrypted_plaintext
281
# Pretend that we have an Avahi module
283
"""This isn't so much a class as it is a module-like namespace."""
284
IF_UNSPEC = -1 # avahi-common/address.h
285
PROTO_UNSPEC = -1 # avahi-common/address.h
286
PROTO_INET = 0 # avahi-common/address.h
287
PROTO_INET6 = 1 # avahi-common/address.h
288
DBUS_NAME = "org.freedesktop.Avahi"
289
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
290
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
291
DBUS_PATH_SERVER = "/"
294
def string_array_to_txt_array(t):
295
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
296
for s in t), signature="ay")
297
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
298
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
299
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
300
SERVER_INVALID = 0 # avahi-common/defs.h
301
SERVER_REGISTERING = 1 # avahi-common/defs.h
302
SERVER_RUNNING = 2 # avahi-common/defs.h
303
SERVER_COLLISION = 3 # avahi-common/defs.h
304
SERVER_FAILURE = 4 # avahi-common/defs.h
214
307
class AvahiError(Exception):
215
308
def __init__(self, value, *args, **kwargs):
216
309
self.value = value
217
super(AvahiError, self).__init__(value, *args, **kwargs)
218
def __unicode__(self):
219
return unicode(repr(self.value))
310
return super(AvahiError, self).__init__(value, *args,
221
314
class AvahiServiceError(AvahiError):
224
318
class AvahiGroupError(AvahiError):
228
322
class AvahiService(object):
229
323
"""An Avahi (Zeroconf) service.
232
326
interface: integer; avahi.IF_UNSPEC or an interface index.
233
327
Used to optionally bind to the specified interface.
234
328
name: string; Example: 'Mandos'
235
329
type: string; Example: '_mandos._tcp'.
236
See <http://www.dns-sd.org/ServiceTypes.html>
330
See <https://www.iana.org/assignments/service-names-port-numbers>
237
331
port: integer; what port to announce
238
332
TXT: list of strings; TXT record for the service
239
333
domain: string; Domain to publish on, default to .local if empty.
376
492
follow_name_owner_changes=True),
377
493
avahi.DBUS_INTERFACE_SERVER)
378
494
self.server.connect_to_signal("StateChanged",
379
self.server_state_changed)
495
self.server_state_changed)
380
496
self.server_state_changed(self.server.GetState())
382
499
class AvahiServiceToSyslog(AvahiService):
500
def rename(self, *args, **kwargs):
384
501
"""Add the new name to the syslog messages"""
385
ret = AvahiService.rename(self)
386
syslogger.setFormatter(logging.Formatter
387
('Mandos ({0}) [%(process)d]:'
388
' %(levelname)s: %(message)s'
502
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
503
syslogger.setFormatter(logging.Formatter(
504
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
392
def timedelta_to_milliseconds(td):
393
"Convert a datetime.timedelta() to milliseconds"
394
return ((td.days * 24 * 60 * 60 * 1000)
395
+ (td.seconds * 1000)
396
+ (td.microseconds // 1000))
509
# Pretend that we have a GnuTLS module
510
class gnutls(object):
511
"""This isn't so much a class as it is a module-like namespace."""
513
library = ctypes.util.find_library("gnutls")
515
library = ctypes.util.find_library("gnutls-deb0")
516
_library = ctypes.cdll.LoadLibrary(library)
519
# Unless otherwise indicated, the constants and types below are
520
# all from the gnutls/gnutls.h C header file.
531
E_NO_CERTIFICATE_FOUND = -49
536
KEYID_USE_SHA256 = 1 # gnutls/x509.h
537
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
540
class session_int(ctypes.Structure):
542
session_t = ctypes.POINTER(session_int)
544
class certificate_credentials_st(ctypes.Structure):
546
certificate_credentials_t = ctypes.POINTER(
547
certificate_credentials_st)
548
certificate_type_t = ctypes.c_int
550
class datum_t(ctypes.Structure):
551
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
552
('size', ctypes.c_uint)]
554
class openpgp_crt_int(ctypes.Structure):
556
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
557
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
558
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
559
credentials_type_t = ctypes.c_int
560
transport_ptr_t = ctypes.c_void_p
561
close_request_t = ctypes.c_int
564
class Error(Exception):
565
def __init__(self, message=None, code=None, args=()):
566
# Default usage is by a message string, but if a return
567
# code is passed, convert it to a string with
570
if message is None and code is not None:
571
message = gnutls.strerror(code)
572
return super(gnutls.Error, self).__init__(
575
class CertificateSecurityError(Error):
579
class Credentials(object):
581
self._c_object = gnutls.certificate_credentials_t()
582
gnutls.certificate_allocate_credentials(
583
ctypes.byref(self._c_object))
584
self.type = gnutls.CRD_CERTIFICATE
587
gnutls.certificate_free_credentials(self._c_object)
589
class ClientSession(object):
590
def __init__(self, socket, credentials=None):
591
self._c_object = gnutls.session_t()
592
gnutls_flags = gnutls.CLIENT
593
if gnutls.check_version(b"3.5.6"):
594
gnutls_flags |= gnutls.NO_TICKETS
596
gnutls_flags |= gnutls.ENABLE_RAWPK
597
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
599
gnutls.set_default_priority(self._c_object)
600
gnutls.transport_set_ptr(self._c_object, socket.fileno())
601
gnutls.handshake_set_private_extensions(self._c_object,
604
if credentials is None:
605
credentials = gnutls.Credentials()
606
gnutls.credentials_set(self._c_object, credentials.type,
607
ctypes.cast(credentials._c_object,
609
self.credentials = credentials
612
gnutls.deinit(self._c_object)
615
return gnutls.handshake(self._c_object)
617
def send(self, data):
621
data_len -= gnutls.record_send(self._c_object,
626
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
628
# Error handling functions
629
def _error_code(result):
630
"""A function to raise exceptions on errors, suitable
631
for the 'restype' attribute on ctypes functions"""
634
if result == gnutls.E_NO_CERTIFICATE_FOUND:
635
raise gnutls.CertificateSecurityError(code=result)
636
raise gnutls.Error(code=result)
638
def _retry_on_error(result, func, arguments):
639
"""A function to retry on some errors, suitable
640
for the 'errcheck' attribute on ctypes functions"""
642
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
643
return _error_code(result)
644
result = func(*arguments)
647
# Unless otherwise indicated, the function declarations below are
648
# all from the gnutls/gnutls.h C header file.
651
priority_set_direct = _library.gnutls_priority_set_direct
652
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
653
ctypes.POINTER(ctypes.c_char_p)]
654
priority_set_direct.restype = _error_code
656
init = _library.gnutls_init
657
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
658
init.restype = _error_code
660
set_default_priority = _library.gnutls_set_default_priority
661
set_default_priority.argtypes = [session_t]
662
set_default_priority.restype = _error_code
664
record_send = _library.gnutls_record_send
665
record_send.argtypes = [session_t, ctypes.c_void_p,
667
record_send.restype = ctypes.c_ssize_t
668
record_send.errcheck = _retry_on_error
670
certificate_allocate_credentials = (
671
_library.gnutls_certificate_allocate_credentials)
672
certificate_allocate_credentials.argtypes = [
673
ctypes.POINTER(certificate_credentials_t)]
674
certificate_allocate_credentials.restype = _error_code
676
certificate_free_credentials = (
677
_library.gnutls_certificate_free_credentials)
678
certificate_free_credentials.argtypes = [
679
certificate_credentials_t]
680
certificate_free_credentials.restype = None
682
handshake_set_private_extensions = (
683
_library.gnutls_handshake_set_private_extensions)
684
handshake_set_private_extensions.argtypes = [session_t,
686
handshake_set_private_extensions.restype = None
688
credentials_set = _library.gnutls_credentials_set
689
credentials_set.argtypes = [session_t, credentials_type_t,
691
credentials_set.restype = _error_code
693
strerror = _library.gnutls_strerror
694
strerror.argtypes = [ctypes.c_int]
695
strerror.restype = ctypes.c_char_p
697
certificate_type_get = _library.gnutls_certificate_type_get
698
certificate_type_get.argtypes = [session_t]
699
certificate_type_get.restype = _error_code
701
certificate_get_peers = _library.gnutls_certificate_get_peers
702
certificate_get_peers.argtypes = [session_t,
703
ctypes.POINTER(ctypes.c_uint)]
704
certificate_get_peers.restype = ctypes.POINTER(datum_t)
706
global_set_log_level = _library.gnutls_global_set_log_level
707
global_set_log_level.argtypes = [ctypes.c_int]
708
global_set_log_level.restype = None
710
global_set_log_function = _library.gnutls_global_set_log_function
711
global_set_log_function.argtypes = [log_func]
712
global_set_log_function.restype = None
714
deinit = _library.gnutls_deinit
715
deinit.argtypes = [session_t]
716
deinit.restype = None
718
handshake = _library.gnutls_handshake
719
handshake.argtypes = [session_t]
720
handshake.restype = _error_code
721
handshake.errcheck = _retry_on_error
723
transport_set_ptr = _library.gnutls_transport_set_ptr
724
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
725
transport_set_ptr.restype = None
727
bye = _library.gnutls_bye
728
bye.argtypes = [session_t, close_request_t]
729
bye.restype = _error_code
730
bye.errcheck = _retry_on_error
732
check_version = _library.gnutls_check_version
733
check_version.argtypes = [ctypes.c_char_p]
734
check_version.restype = ctypes.c_char_p
736
_need_version = b"3.3.0"
737
if check_version(_need_version) is None:
738
raise self.Error("Needs GnuTLS {} or later"
739
.format(_need_version))
741
_tls_rawpk_version = b"3.6.6"
742
has_rawpk = bool(check_version(_tls_rawpk_version))
746
class pubkey_st(ctypes.Structure):
748
pubkey_t = ctypes.POINTER(pubkey_st)
750
x509_crt_fmt_t = ctypes.c_int
752
# All the function declarations below are from gnutls/abstract.h
753
pubkey_init = _library.gnutls_pubkey_init
754
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
755
pubkey_init.restype = _error_code
757
pubkey_import = _library.gnutls_pubkey_import
758
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
760
pubkey_import.restype = _error_code
762
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
763
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
764
ctypes.POINTER(ctypes.c_ubyte),
765
ctypes.POINTER(ctypes.c_size_t)]
766
pubkey_get_key_id.restype = _error_code
768
pubkey_deinit = _library.gnutls_pubkey_deinit
769
pubkey_deinit.argtypes = [pubkey_t]
770
pubkey_deinit.restype = None
772
# All the function declarations below are from gnutls/openpgp.h
774
openpgp_crt_init = _library.gnutls_openpgp_crt_init
775
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
776
openpgp_crt_init.restype = _error_code
778
openpgp_crt_import = _library.gnutls_openpgp_crt_import
779
openpgp_crt_import.argtypes = [openpgp_crt_t,
780
ctypes.POINTER(datum_t),
782
openpgp_crt_import.restype = _error_code
784
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
785
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
786
ctypes.POINTER(ctypes.c_uint)]
787
openpgp_crt_verify_self.restype = _error_code
789
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
790
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
791
openpgp_crt_deinit.restype = None
793
openpgp_crt_get_fingerprint = (
794
_library.gnutls_openpgp_crt_get_fingerprint)
795
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
799
openpgp_crt_get_fingerprint.restype = _error_code
801
if check_version(b"3.6.4"):
802
certificate_type_get2 = _library.gnutls_certificate_type_get2
803
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
804
certificate_type_get2.restype = _error_code
806
# Remove non-public functions
807
del _error_code, _retry_on_error
810
def call_pipe(connection, # : multiprocessing.Connection
811
func, *args, **kwargs):
812
"""This function is meant to be called by multiprocessing.Process
814
This function runs func(*args, **kwargs), and writes the resulting
815
return value on the provided multiprocessing.Connection.
817
connection.send(func(*args, **kwargs))
398
821
class Client(object):
399
822
"""A representation of a client host served by this server.
402
825
approved: bool(); 'None' if not yet approved/disapproved
403
826
approval_delay: datetime.timedelta(); Time to wait for approval
404
827
approval_duration: datetime.timedelta(); Duration of one approval
405
checker: subprocess.Popen(); a running checker process used
406
to see if the client lives.
407
'None' if no process is running.
408
checker_callback_tag: a gobject event source tag, or None
828
checker: multiprocessing.Process(); a running checker process used
829
to see if the client lives. 'None' if no process is
831
checker_callback_tag: a GLib event source tag, or None
409
832
checker_command: string; External command which is run to check
410
833
if client lives. %() expansions are done at
411
834
runtime with vars(self) as dict, so that for
412
835
instance %(name)s can be used in the command.
413
checker_initiator_tag: a gobject event source tag, or None
836
checker_initiator_tag: a GLib event source tag, or None
414
837
created: datetime.datetime(); (UTC) object creation
415
838
client_structure: Object describing what attributes a client has
416
839
and is used for storing the client at exit
417
840
current_checker_command: string; current running checker_command
418
disable_initiator_tag: a gobject event source tag, or None
841
disable_initiator_tag: a GLib event source tag, or None
420
843
fingerprint: string (40 or 32 hexadecimal digits); used to
421
uniquely identify the client
844
uniquely identify an OpenPGP client
845
key_id: string (64 hexadecimal digits); used to uniquely identify
846
a client using raw public keys
422
847
host: string; available for use by the checker command
423
848
interval: datetime.timedelta(); How often to start a new checker
424
849
last_approval_request: datetime.datetime(); (UTC) or None
586
1006
logger.info("Disabling client %s", self.name)
587
1007
if getattr(self, "disable_initiator_tag", None) is not None:
588
gobject.source_remove(self.disable_initiator_tag)
1008
GLib.source_remove(self.disable_initiator_tag)
589
1009
self.disable_initiator_tag = None
590
1010
self.expires = None
591
1011
if getattr(self, "checker_initiator_tag", None) is not None:
592
gobject.source_remove(self.checker_initiator_tag)
1012
GLib.source_remove(self.checker_initiator_tag)
593
1013
self.checker_initiator_tag = None
594
1014
self.stop_checker()
595
1015
self.enabled = False
597
1017
self.send_changedstate()
598
# Do not run this again if called by a gobject.timeout_add
1018
# Do not run this again if called by a GLib.timeout_add
601
1021
def __del__(self):
604
1024
def init_checker(self):
605
1025
# Schedule a new checker to be started an 'interval' from now,
606
1026
# and every interval from then on.
607
1027
if self.checker_initiator_tag is not None:
608
gobject.source_remove(self.checker_initiator_tag)
609
self.checker_initiator_tag = (gobject.timeout_add
610
(self.interval_milliseconds(),
1028
GLib.source_remove(self.checker_initiator_tag)
1029
self.checker_initiator_tag = GLib.timeout_add(
1030
int(self.interval.total_seconds() * 1000),
612
1032
# Schedule a disable() when 'timeout' has passed
613
1033
if self.disable_initiator_tag is not None:
614
gobject.source_remove(self.disable_initiator_tag)
615
self.disable_initiator_tag = (gobject.timeout_add
616
(self.timeout_milliseconds(),
1034
GLib.source_remove(self.disable_initiator_tag)
1035
self.disable_initiator_tag = GLib.timeout_add(
1036
int(self.timeout.total_seconds() * 1000), self.disable)
618
1037
# Also start a new checker *right now*.
619
1038
self.start_checker()
621
def checker_callback(self, pid, condition, command):
1040
def checker_callback(self, source, condition, connection,
622
1042
"""The checker has completed, so take appropriate actions."""
1043
# Read return code from connection (see call_pipe)
1044
returncode = connection.recv()
623
1047
self.checker_callback_tag = None
624
1048
self.checker = None
625
if os.WIFEXITED(condition):
626
self.last_checker_status = os.WEXITSTATUS(condition)
1051
self.last_checker_status = returncode
1052
self.last_checker_signal = None
627
1053
if self.last_checker_status == 0:
628
1054
logger.info("Checker for %(name)s succeeded",
630
1056
self.checked_ok()
632
logger.info("Checker for %(name)s failed",
1058
logger.info("Checker for %(name)s failed", vars(self))
635
1060
self.last_checker_status = -1
1061
self.last_checker_signal = -returncode
636
1062
logger.warning("Checker for %(name)s crashed?",
639
1066
def checked_ok(self):
640
1067
"""Assert that the client has been seen, alive and well."""
641
1068
self.last_checked_ok = datetime.datetime.utcnow()
642
1069
self.last_checker_status = 0
1070
self.last_checker_signal = None
643
1071
self.bump_timeout()
645
1073
def bump_timeout(self, timeout=None):
646
1074
"""Bump up the timeout for this client."""
647
1075
if timeout is None:
648
1076
timeout = self.timeout
649
1077
if self.disable_initiator_tag is not None:
650
gobject.source_remove(self.disable_initiator_tag)
1078
GLib.source_remove(self.disable_initiator_tag)
651
1079
self.disable_initiator_tag = None
652
1080
if getattr(self, "enabled", False):
653
self.disable_initiator_tag = (gobject.timeout_add
654
(timedelta_to_milliseconds
655
(timeout), self.disable))
1081
self.disable_initiator_tag = GLib.timeout_add(
1082
int(timeout.total_seconds() * 1000), self.disable)
656
1083
self.expires = datetime.datetime.utcnow() + timeout
658
1085
def need_approval(self):
659
1086
self.last_approval_request = datetime.datetime.utcnow()
661
1088
def start_checker(self):
662
1089
"""Start a new checker subprocess if one is not running.
664
1091
If a checker already exists, leave it running and do
666
1093
# The reason for not killing a running checker is that if we
671
1098
# checkers alone, the checker would have to take more time
672
1099
# than 'timeout' for the client to be disabled, which is as it
675
# If a checker exists, make sure it is not a zombie
677
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
678
except (AttributeError, OSError) as error:
679
if (isinstance(error, OSError)
680
and error.errno != errno.ECHILD):
684
logger.warning("Checker was a zombie")
685
gobject.source_remove(self.checker_callback_tag)
686
self.checker_callback(pid, status,
687
self.current_checker_command)
1102
if self.checker is not None and not self.checker.is_alive():
1103
logger.warning("Checker was not alive; joining")
688
1106
# Start a new checker if needed
689
1107
if self.checker is None:
1108
# Escape attributes for the shell
1110
attr: re.escape(str(getattr(self, attr)))
1111
for attr in self.runtime_expansions}
691
# In case checker_command has exactly one % operator
692
command = self.checker_command % self.host
694
# Escape attributes for the shell
695
escaped_attrs = dict(
697
re.escape(unicode(str(getattr(self, attr, "")),
701
self.runtime_expansions)
704
command = self.checker_command % escaped_attrs
705
except TypeError as error:
706
logger.error('Could not format string "%s"',
707
self.checker_command, exc_info=error)
708
return True # Try again later
1113
command = self.checker_command % escaped_attrs
1114
except TypeError as error:
1115
logger.error('Could not format string "%s"',
1116
self.checker_command,
1118
return True # Try again later
709
1119
self.current_checker_command = command
711
logger.info("Starting checker %r for %s",
713
# We don't need to redirect stdout and stderr, since
714
# in normal mode, that is already done by daemon(),
715
# and in debug mode we don't want to. (Stdin is
716
# always replaced by /dev/null.)
717
self.checker = subprocess.Popen(command,
720
self.checker_callback_tag = (gobject.child_watch_add
722
self.checker_callback,
724
# The checker may have completed before the gobject
725
# watch was added. Check for this.
726
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
728
gobject.source_remove(self.checker_callback_tag)
729
self.checker_callback(pid, status, command)
730
except OSError as error:
731
logger.error("Failed to start subprocess",
733
# Re-run this periodically if run by gobject.timeout_add
1120
logger.info("Starting checker %r for %s", command,
1122
# We don't need to redirect stdout and stderr, since
1123
# in normal mode, that is already done by daemon(),
1124
# and in debug mode we don't want to. (Stdin is
1125
# always replaced by /dev/null.)
1126
# The exception is when not debugging but nevertheless
1127
# running in the foreground; use the previously
1129
popen_args = {"close_fds": True,
1132
if (not self.server_settings["debug"]
1133
and self.server_settings["foreground"]):
1134
popen_args.update({"stdout": wnull,
1136
pipe = multiprocessing.Pipe(duplex=False)
1137
self.checker = multiprocessing.Process(
1139
args=(pipe[1], subprocess.call, command),
1141
self.checker.start()
1142
self.checker_callback_tag = GLib.io_add_watch(
1143
pipe[0].fileno(), GLib.IO_IN,
1144
self.checker_callback, pipe[0], command)
1145
# Re-run this periodically if run by GLib.timeout_add
736
1148
def stop_checker(self):
737
1149
"""Force the checker process, if any, to stop."""
738
1150
if self.checker_callback_tag:
739
gobject.source_remove(self.checker_callback_tag)
1151
GLib.source_remove(self.checker_callback_tag)
740
1152
self.checker_callback_tag = None
741
1153
if getattr(self, "checker", None) is None:
743
1155
logger.debug("Stopping checker for %(name)s", vars(self))
745
self.checker.terminate()
747
#if self.checker.poll() is None:
748
# self.checker.kill()
749
except OSError as error:
750
if error.errno != errno.ESRCH: # No such process
1156
self.checker.terminate()
752
1157
self.checker = None
755
def dbus_service_property(dbus_interface, signature="v",
756
access="readwrite", byte_arrays=False):
1160
def dbus_service_property(dbus_interface,
757
1164
"""Decorators for marking methods of a DBusObjectWithProperties to
758
1165
become properties on the D-Bus.
760
1167
The decorated method will be called with no arguments by "Get"
761
1168
and with one argument by "Set".
763
1170
The parameters, where they are supported, are the same as
764
1171
dbus.service.method, except there is only "signature", since the
765
1172
type from Get() and the type sent to Set() is the same.
841
class DBusObjectWithProperties(dbus.service.Object):
842
"""A D-Bus object with properties.
844
Classes inheriting from this can use the dbus_service_property
845
decorator to expose methods as D-Bus properties. It exposes the
846
standard Get(), Set(), and GetAll() methods on the D-Bus.
1255
class DBusObjectWithAnnotations(dbus.service.Object):
1256
"""A D-Bus object with annotations.
1258
Classes inheriting from this can use the dbus_annotations
1259
decorator to add annotations to methods or signals.
850
1263
def _is_dbus_thing(thing):
851
1264
"""Returns a function testing if an attribute is a D-Bus thing
853
1266
If called like _is_dbus_thing("method") it returns a function
854
1267
suitable for use as predicate to inspect.getmembers().
856
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
1269
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
859
1272
def _get_all_dbus_things(self, thing):
860
1273
"""Returns a generator of (name, attribute) pairs
862
return ((getattr(athing.__get__(self), "_dbus_name",
1275
return ((getattr(athing.__get__(self), "_dbus_name", name),
864
1276
athing.__get__(self))
865
1277
for cls in self.__class__.__mro__
866
1278
for name, athing in
867
inspect.getmembers(cls,
868
self._is_dbus_thing(thing)))
1279
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1281
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1283
path_keyword='object_path',
1284
connection_keyword='connection')
1285
def Introspect(self, object_path, connection):
1286
"""Overloading of standard D-Bus method.
1288
Inserts annotation tags on methods and signals.
1290
xmlstring = dbus.service.Object.Introspect(self, object_path,
1293
document = xml.dom.minidom.parseString(xmlstring)
1295
for if_tag in document.getElementsByTagName("interface"):
1296
# Add annotation tags
1297
for typ in ("method", "signal"):
1298
for tag in if_tag.getElementsByTagName(typ):
1300
for name, prop in (self.
1301
_get_all_dbus_things(typ)):
1302
if (name == tag.getAttribute("name")
1303
and prop._dbus_interface
1304
== if_tag.getAttribute("name")):
1305
annots.update(getattr(
1306
prop, "_dbus_annotations", {}))
1307
for name, value in annots.items():
1308
ann_tag = document.createElement(
1310
ann_tag.setAttribute("name", name)
1311
ann_tag.setAttribute("value", value)
1312
tag.appendChild(ann_tag)
1313
# Add interface annotation tags
1314
for annotation, value in dict(
1315
itertools.chain.from_iterable(
1316
annotations().items()
1317
for name, annotations
1318
in self._get_all_dbus_things("interface")
1319
if name == if_tag.getAttribute("name")
1321
ann_tag = document.createElement("annotation")
1322
ann_tag.setAttribute("name", annotation)
1323
ann_tag.setAttribute("value", value)
1324
if_tag.appendChild(ann_tag)
1325
# Fix argument name for the Introspect method itself
1326
if (if_tag.getAttribute("name")
1327
== dbus.INTROSPECTABLE_IFACE):
1328
for cn in if_tag.getElementsByTagName("method"):
1329
if cn.getAttribute("name") == "Introspect":
1330
for arg in cn.getElementsByTagName("arg"):
1331
if (arg.getAttribute("direction")
1333
arg.setAttribute("name",
1335
xmlstring = document.toxml("utf-8")
1337
except (AttributeError, xml.dom.DOMException,
1338
xml.parsers.expat.ExpatError) as error:
1339
logger.error("Failed to override Introspection method",
1344
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1345
"""A D-Bus object with properties.
1347
Classes inheriting from this can use the dbus_service_property
1348
decorator to expose methods as D-Bus properties. It exposes the
1349
standard Get(), Set(), and GetAll() methods on the D-Bus.
870
1352
def _get_dbus_property(self, interface_name, property_name):
871
1353
"""Returns a bound method if one exists which is a D-Bus
872
1354
property with the specified name and interface.
874
for cls in self.__class__.__mro__:
875
for name, value in (inspect.getmembers
877
self._is_dbus_thing("property"))):
1356
for cls in self.__class__.__mro__:
1357
for name, value in inspect.getmembers(
1358
cls, self._is_dbus_thing("property")):
878
1359
if (value._dbus_name == property_name
879
1360
and value._dbus_interface == interface_name):
880
1361
return value.__get__(self)
882
1363
# No such property
883
raise DBusPropertyNotFound(self.dbus_object_path + ":"
884
+ interface_name + "."
887
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1364
raise DBusPropertyNotFound("{}:{}.{}".format(
1365
self.dbus_object_path, interface_name, property_name))
1368
def _get_all_interface_names(cls):
1369
"""Get a sequence of all interfaces supported by an object"""
1370
return (name for name in set(getattr(getattr(x, attr),
1371
"_dbus_interface", None)
1372
for x in (inspect.getmro(cls))
1374
if name is not None)
1376
@dbus.service.method(dbus.PROPERTIES_IFACE,
888
1378
out_signature="v")
889
1379
def Get(self, interface_name, property_name):
890
1380
"""Standard D-Bus property Get() method, see D-Bus standard.
1020
1509
return xmlstring
1023
def datetime_to_dbus (dt, variant_level=0):
1513
dbus.OBJECT_MANAGER_IFACE
1514
except AttributeError:
1515
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1518
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1519
"""A D-Bus object with an ObjectManager.
1521
Classes inheriting from this exposes the standard
1522
GetManagedObjects call and the InterfacesAdded and
1523
InterfacesRemoved signals on the standard
1524
"org.freedesktop.DBus.ObjectManager" interface.
1526
Note: No signals are sent automatically; they must be sent
1529
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1530
out_signature="a{oa{sa{sv}}}")
1531
def GetManagedObjects(self):
1532
"""This function must be overridden"""
1533
raise NotImplementedError()
1535
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1536
signature="oa{sa{sv}}")
1537
def InterfacesAdded(self, object_path, interfaces_and_properties):
1540
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1541
def InterfacesRemoved(self, object_path, interfaces):
1544
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1546
path_keyword='object_path',
1547
connection_keyword='connection')
1548
def Introspect(self, object_path, connection):
1549
"""Overloading of standard D-Bus method.
1551
Override return argument name of GetManagedObjects to be
1552
"objpath_interfaces_and_properties"
1554
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1558
document = xml.dom.minidom.parseString(xmlstring)
1560
for if_tag in document.getElementsByTagName("interface"):
1561
# Fix argument name for the GetManagedObjects method
1562
if (if_tag.getAttribute("name")
1563
== dbus.OBJECT_MANAGER_IFACE):
1564
for cn in if_tag.getElementsByTagName("method"):
1565
if (cn.getAttribute("name")
1566
== "GetManagedObjects"):
1567
for arg in cn.getElementsByTagName("arg"):
1568
if (arg.getAttribute("direction")
1572
"objpath_interfaces"
1574
xmlstring = document.toxml("utf-8")
1576
except (AttributeError, xml.dom.DOMException,
1577
xml.parsers.expat.ExpatError) as error:
1578
logger.error("Failed to override Introspection method",
1583
def datetime_to_dbus(dt, variant_level=0):
1024
1584
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1026
return dbus.String("", variant_level = variant_level)
1027
return dbus.String(dt.isoformat(),
1028
variant_level=variant_level)
1586
return dbus.String("", variant_level=variant_level)
1587
return dbus.String(dt.isoformat(), variant_level=variant_level)
1031
1590
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1384
1951
server to mandos-client
1388
1955
# Rejected - signal
1389
1956
@dbus.service.signal(_interface, signature="s")
1390
1957
def Rejected(self, reason):
1394
1961
# NeedApproval - signal
1395
1962
@dbus.service.signal(_interface, signature="tb")
1396
1963
def NeedApproval(self, timeout, default):
1398
1965
return self.need_approval()
1402
1969
# Approve - method
1403
1970
@dbus.service.method(_interface, in_signature="b")
1404
1971
def Approve(self, value):
1405
1972
self.approve(value)
1407
1974
# CheckedOK - method
1408
1975
@dbus.service.method(_interface)
1409
1976
def CheckedOK(self):
1410
1977
self.checked_ok()
1412
1979
# Enable - method
1980
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1413
1981
@dbus.service.method(_interface)
1414
1982
def Enable(self):
1418
1986
# StartChecker - method
1987
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1419
1988
@dbus.service.method(_interface)
1420
1989
def StartChecker(self):
1422
1991
self.start_checker()
1424
1993
# Disable - method
1994
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1425
1995
@dbus.service.method(_interface)
1426
1996
def Disable(self):
1430
2000
# StopChecker - method
2001
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1431
2002
@dbus.service.method(_interface)
1432
2003
def StopChecker(self):
1433
2004
self.stop_checker()
1437
2008
# ApprovalPending - property
1438
2009
@dbus_service_property(_interface, signature="b", access="read")
1439
2010
def ApprovalPending_dbus_property(self):
1440
2011
return dbus.Boolean(bool(self.approvals_pending))
1442
2013
# ApprovedByDefault - property
1443
@dbus_service_property(_interface, signature="b",
2014
@dbus_service_property(_interface,
1444
2016
access="readwrite")
1445
2017
def ApprovedByDefault_dbus_property(self, value=None):
1446
2018
if value is None: # get
1447
2019
return dbus.Boolean(self.approved_by_default)
1448
2020
self.approved_by_default = bool(value)
1450
2022
# ApprovalDelay - property
1451
@dbus_service_property(_interface, signature="t",
2023
@dbus_service_property(_interface,
1452
2025
access="readwrite")
1453
2026
def ApprovalDelay_dbus_property(self, value=None):
1454
2027
if value is None: # get
1455
return dbus.UInt64(self.approval_delay_milliseconds())
2028
return dbus.UInt64(self.approval_delay.total_seconds()
1456
2030
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1458
2032
# ApprovalDuration - property
1459
@dbus_service_property(_interface, signature="t",
2033
@dbus_service_property(_interface,
1460
2035
access="readwrite")
1461
2036
def ApprovalDuration_dbus_property(self, value=None):
1462
2037
if value is None: # get
1463
return dbus.UInt64(timedelta_to_milliseconds(
1464
self.approval_duration))
2038
return dbus.UInt64(self.approval_duration.total_seconds()
1465
2040
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1467
2042
# Name - property
2044
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1468
2045
@dbus_service_property(_interface, signature="s", access="read")
1469
2046
def Name_dbus_property(self):
1470
2047
return dbus.String(self.name)
2051
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2052
@dbus_service_property(_interface, signature="s", access="read")
2053
def KeyID_dbus_property(self):
2054
return dbus.String(self.key_id)
1472
2056
# Fingerprint - property
2058
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1473
2059
@dbus_service_property(_interface, signature="s", access="read")
1474
2060
def Fingerprint_dbus_property(self):
1475
2061
return dbus.String(self.fingerprint)
1477
2063
# Host - property
1478
@dbus_service_property(_interface, signature="s",
2064
@dbus_service_property(_interface,
1479
2066
access="readwrite")
1480
2067
def Host_dbus_property(self, value=None):
1481
2068
if value is None: # get
1482
2069
return dbus.String(self.host)
1483
self.host = unicode(value)
2070
self.host = str(value)
1485
2072
# Created - property
2074
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1486
2075
@dbus_service_property(_interface, signature="s", access="read")
1487
2076
def Created_dbus_property(self):
1488
2077
return datetime_to_dbus(self.created)
1490
2079
# LastEnabled - property
1491
2080
@dbus_service_property(_interface, signature="s", access="read")
1492
2081
def LastEnabled_dbus_property(self):
1493
2082
return datetime_to_dbus(self.last_enabled)
1495
2084
# Enabled - property
1496
@dbus_service_property(_interface, signature="b",
2085
@dbus_service_property(_interface,
1497
2087
access="readwrite")
1498
2088
def Enabled_dbus_property(self, value=None):
1499
2089
if value is None: # get
1547
2138
if (getattr(self, "disable_initiator_tag", None)
1550
gobject.source_remove(self.disable_initiator_tag)
1551
self.disable_initiator_tag = (
1552
gobject.timeout_add(
1553
timedelta_to_milliseconds(self.expires - now),
2141
GLib.source_remove(self.disable_initiator_tag)
2142
self.disable_initiator_tag = GLib.timeout_add(
2143
int((self.expires - now).total_seconds() * 1000),
1556
2146
# ExtendedTimeout - property
1557
@dbus_service_property(_interface, signature="t",
2147
@dbus_service_property(_interface,
1558
2149
access="readwrite")
1559
2150
def ExtendedTimeout_dbus_property(self, value=None):
1560
2151
if value is None: # get
1561
return dbus.UInt64(self.extended_timeout_milliseconds())
2152
return dbus.UInt64(self.extended_timeout.total_seconds()
1562
2154
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1564
2156
# Interval - property
1565
@dbus_service_property(_interface, signature="t",
2157
@dbus_service_property(_interface,
1566
2159
access="readwrite")
1567
2160
def Interval_dbus_property(self, value=None):
1568
2161
if value is None: # get
1569
return dbus.UInt64(self.interval_milliseconds())
2162
return dbus.UInt64(self.interval.total_seconds() * 1000)
1570
2163
self.interval = datetime.timedelta(0, 0, 0, value)
1571
2164
if getattr(self, "checker_initiator_tag", None) is None:
1573
2166
if self.enabled:
1574
2167
# Reschedule checker run
1575
gobject.source_remove(self.checker_initiator_tag)
1576
self.checker_initiator_tag = (gobject.timeout_add
1577
(value, self.start_checker))
1578
self.start_checker() # Start one now, too
2168
GLib.source_remove(self.checker_initiator_tag)
2169
self.checker_initiator_tag = GLib.timeout_add(
2170
value, self.start_checker)
2171
self.start_checker() # Start one now, too
1580
2173
# Checker - property
1581
@dbus_service_property(_interface, signature="s",
2174
@dbus_service_property(_interface,
1582
2176
access="readwrite")
1583
2177
def Checker_dbus_property(self, value=None):
1584
2178
if value is None: # get
1585
2179
return dbus.String(self.checker_command)
1586
self.checker_command = unicode(value)
2180
self.checker_command = str(value)
1588
2182
# CheckerRunning - property
1589
@dbus_service_property(_interface, signature="b",
2183
@dbus_service_property(_interface,
1590
2185
access="readwrite")
1591
2186
def CheckerRunning_dbus_property(self, value=None):
1592
2187
if value is None: # get
1639
2244
class ClientHandler(socketserver.BaseRequestHandler, object):
1640
2245
"""A class to handle client connections.
1642
2247
Instantiated once for each connection to handle it.
1643
2248
Note: This will run in its own forked process."""
1645
2250
def handle(self):
1646
2251
with contextlib.closing(self.server.child_pipe) as child_pipe:
1647
2252
logger.info("TCP connection from: %s",
1648
unicode(self.client_address))
2253
str(self.client_address))
1649
2254
logger.debug("Pipe FD: %d",
1650
2255
self.server.child_pipe.fileno())
1652
session = (gnutls.connection
1653
.ClientSession(self.request,
1655
.X509Credentials()))
1657
# Note: gnutls.connection.X509Credentials is really a
1658
# generic GnuTLS certificate credentials object so long as
1659
# no X.509 keys are added to it. Therefore, we can use it
1660
# here despite using OpenPGP certificates.
1662
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1663
# "+AES-256-CBC", "+SHA1",
1664
# "+COMP-NULL", "+CTYPE-OPENPGP",
2257
session = gnutls.ClientSession(self.request)
2259
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2260
# "+AES-256-CBC", "+SHA1",
2261
# "+COMP-NULL", "+CTYPE-OPENPGP",
1666
2263
# Use a fallback default, since this MUST be set.
1667
2264
priority = self.server.gnutls_priority
1668
2265
if priority is None:
1669
2266
priority = "NORMAL"
1670
(gnutls.library.functions
1671
.gnutls_priority_set_direct(session._c_object,
2267
gnutls.priority_set_direct(session._c_object,
2268
priority.encode("utf-8"),
1674
2271
# Start communication using the Mandos protocol
1675
2272
# Get protocol number
1676
2273
line = self.request.makefile().readline()
1677
2274
logger.debug("Protocol version: %r", line)
1679
2276
if int(line.strip().split()[0]) > 1:
2277
raise RuntimeError(line)
1681
2278
except (ValueError, IndexError, RuntimeError) as error:
1682
2279
logger.error("Unknown protocol version: %s", error)
1685
2282
# Start GnuTLS connection
1687
2284
session.handshake()
1688
except gnutls.errors.GNUTLSError as error:
2285
except gnutls.Error as error:
1689
2286
logger.warning("Handshake failed: %s", error)
1690
2287
# Do not run session.bye() here: the session is not
1691
2288
# established. Just abandon the request.
1693
2290
logger.debug("Handshake succeeded")
1695
2292
approval_required = False
1698
fpr = self.fingerprint(self.peer_certificate
1701
gnutls.errors.GNUTLSError) as error:
1702
logger.warning("Bad certificate: %s", error)
1704
logger.debug("Fingerprint: %s", fpr)
1707
client = ProxyClient(child_pipe, fpr,
2294
if gnutls.has_rawpk:
2297
key_id = self.key_id(
2298
self.peer_certificate(session))
2299
except (TypeError, gnutls.Error) as error:
2300
logger.warning("Bad certificate: %s", error)
2302
logger.debug("Key ID: %s", key_id)
2307
fpr = self.fingerprint(
2308
self.peer_certificate(session))
2309
except (TypeError, gnutls.Error) as error:
2310
logger.warning("Bad certificate: %s", error)
2312
logger.debug("Fingerprint: %s", fpr)
2315
client = ProxyClient(child_pipe, key_id, fpr,
1708
2316
self.client_address)
1709
2317
except KeyError:
1712
2320
if client.approval_delay:
1713
2321
delay = client.approval_delay
1714
2322
client.approvals_pending += 1
1715
2323
approval_required = True
1718
2326
if not client.enabled:
1719
2327
logger.info("Client %s is disabled",
1721
2329
if self.server.use_dbus:
1722
2330
# Emit D-Bus signal
1723
2331
client.Rejected("Disabled")
1726
2334
if client.approved or not client.approval_delay:
1727
#We are approved or approval is disabled
2335
# We are approved or approval is disabled
1729
2337
elif client.approved is None:
1730
2338
logger.info("Client %s needs approval",
1765
2371
delay -= time2 - time
1768
while sent_size < len(client.secret):
1770
sent = session.send(client.secret[sent_size:])
1771
except gnutls.errors.GNUTLSError as error:
1772
logger.warning("gnutls send failed",
1775
logger.debug("Sent: %d, remaining: %d",
1776
sent, len(client.secret)
1777
- (sent_size + sent))
2374
session.send(client.secret)
2375
except gnutls.Error as error:
2376
logger.warning("gnutls send failed",
1780
2380
logger.info("Sending secret to %s", client.name)
1781
2381
# bump the timeout using extended_timeout
1782
2382
client.bump_timeout(client.extended_timeout)
1783
2383
if self.server.use_dbus:
1784
2384
# Emit D-Bus signal
1785
2385
client.GotSecret()
1788
2388
if approval_required:
1789
2389
client.approvals_pending -= 1
1792
except gnutls.errors.GNUTLSError as error:
2392
except gnutls.Error as error:
1793
2393
logger.warning("GnuTLS bye failed",
1794
2394
exc_info=error)
1797
2397
def peer_certificate(session):
1798
"Return the peer's OpenPGP certificate as a bytestring"
1799
# If not an OpenPGP certificate...
1800
if (gnutls.library.functions
1801
.gnutls_certificate_type_get(session._c_object)
1802
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1803
# ...do the normal thing
1804
return session.peer_certificate
2398
"Return the peer's certificate as a bytestring"
2400
cert_type = gnutls.certificate_type_get2(session._c_object,
2402
except AttributeError:
2403
cert_type = gnutls.certificate_type_get(session._c_object)
2404
if gnutls.has_rawpk:
2405
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2407
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2408
# If not a valid certificate type...
2409
if cert_type not in valid_cert_types:
2410
logger.info("Cert type %r not in %r", cert_type,
2412
# ...return invalid data
1805
2414
list_size = ctypes.c_uint(1)
1806
cert_list = (gnutls.library.functions
1807
.gnutls_certificate_get_peers
2415
cert_list = (gnutls.certificate_get_peers
1808
2416
(session._c_object, ctypes.byref(list_size)))
1809
2417
if not bool(cert_list) and list_size.value != 0:
1810
raise gnutls.errors.GNUTLSError("error getting peer"
2418
raise gnutls.Error("error getting peer certificate")
1812
2419
if list_size.value == 0:
1814
2421
cert = cert_list[0]
1815
2422
return ctypes.string_at(cert.data, cert.size)
2425
def key_id(certificate):
2426
"Convert a certificate bytestring to a hexdigit key ID"
2427
# New GnuTLS "datum" with the public key
2428
datum = gnutls.datum_t(
2429
ctypes.cast(ctypes.c_char_p(certificate),
2430
ctypes.POINTER(ctypes.c_ubyte)),
2431
ctypes.c_uint(len(certificate)))
2432
# XXX all these need to be created in the gnutls "module"
2433
# New empty GnuTLS certificate
2434
pubkey = gnutls.pubkey_t()
2435
gnutls.pubkey_init(ctypes.byref(pubkey))
2436
# Import the raw public key into the certificate
2437
gnutls.pubkey_import(pubkey,
2438
ctypes.byref(datum),
2439
gnutls.X509_FMT_DER)
2440
# New buffer for the key ID
2441
buf = ctypes.create_string_buffer(32)
2442
buf_len = ctypes.c_size_t(len(buf))
2443
# Get the key ID from the raw public key into the buffer
2444
gnutls.pubkey_get_key_id(pubkey,
2445
gnutls.KEYID_USE_SHA256,
2446
ctypes.cast(ctypes.byref(buf),
2447
ctypes.POINTER(ctypes.c_ubyte)),
2448
ctypes.byref(buf_len))
2449
# Deinit the certificate
2450
gnutls.pubkey_deinit(pubkey)
2452
# Convert the buffer to a Python bytestring
2453
key_id = ctypes.string_at(buf, buf_len.value)
2454
# Convert the bytestring to hexadecimal notation
2455
hex_key_id = binascii.hexlify(key_id).upper()
1818
2459
def fingerprint(openpgp):
1819
2460
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1820
2461
# New GnuTLS "datum" with the OpenPGP public key
1821
datum = (gnutls.library.types
1822
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1825
ctypes.c_uint(len(openpgp))))
2462
datum = gnutls.datum_t(
2463
ctypes.cast(ctypes.c_char_p(openpgp),
2464
ctypes.POINTER(ctypes.c_ubyte)),
2465
ctypes.c_uint(len(openpgp)))
1826
2466
# New empty GnuTLS certificate
1827
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1828
(gnutls.library.functions
1829
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2467
crt = gnutls.openpgp_crt_t()
2468
gnutls.openpgp_crt_init(ctypes.byref(crt))
1830
2469
# Import the OpenPGP public key into the certificate
1831
(gnutls.library.functions
1832
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1833
gnutls.library.constants
1834
.GNUTLS_OPENPGP_FMT_RAW))
2470
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2471
gnutls.OPENPGP_FMT_RAW)
1835
2472
# Verify the self signature in the key
1836
2473
crtverify = ctypes.c_uint()
1837
(gnutls.library.functions
1838
.gnutls_openpgp_crt_verify_self(crt, 0,
1839
ctypes.byref(crtverify)))
2474
gnutls.openpgp_crt_verify_self(crt, 0,
2475
ctypes.byref(crtverify))
1840
2476
if crtverify.value != 0:
1841
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1842
raise (gnutls.errors.CertificateSecurityError
2477
gnutls.openpgp_crt_deinit(crt)
2478
raise gnutls.CertificateSecurityError(code
1844
2480
# New buffer for the fingerprint
1845
2481
buf = ctypes.create_string_buffer(20)
1846
2482
buf_len = ctypes.c_size_t()
1847
2483
# Get the fingerprint from the certificate into the buffer
1848
(gnutls.library.functions
1849
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1850
ctypes.byref(buf_len)))
2484
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2485
ctypes.byref(buf_len))
1851
2486
# Deinit the certificate
1852
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2487
gnutls.openpgp_crt_deinit(crt)
1853
2488
# Convert the buffer to a Python bytestring
1854
2489
fpr = ctypes.string_at(buf, buf_len.value)
1855
2490
# Convert the bytestring to hexadecimal notation
1860
2495
class MultiprocessingMixIn(object):
1861
2496
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1862
2498
def sub_process_main(self, request, address):
1864
2500
self.finish_request(request, address)
1865
2501
except Exception:
1866
2502
self.handle_error(request, address)
1867
2503
self.close_request(request)
1869
2505
def process_request(self, request, address):
1870
2506
"""Start a new process to process the request."""
1871
proc = multiprocessing.Process(target = self.sub_process_main,
1872
args = (request, address))
2507
proc = multiprocessing.Process(target=self.sub_process_main,
2508
args=(request, address))
1877
2513
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1878
2514
""" adds a pipe to the MixIn """
1879
2516
def process_request(self, request, client_address):
1880
2517
"""Overrides and wraps the original process_request().
1882
2519
This function creates a new pipe in self.pipe
1884
2521
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1886
2523
proc = MultiprocessingMixIn.process_request(self, request,
1887
2524
client_address)
1888
2525
self.child_pipe.close()
1889
2526
self.add_pipe(parent_pipe, proc)
1891
2528
def add_pipe(self, parent_pipe, proc):
1892
2529
"""Dummy function; override as necessary"""
1893
raise NotImplementedError
2530
raise NotImplementedError()
1896
2533
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1897
2534
socketserver.TCPServer, object):
1898
2535
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1901
2538
enabled: Boolean; whether this server is activated yet
1902
2539
interface: None or a network interface name (string)
1903
2540
use_ipv6: Boolean; to use IPv6 or not
1905
2543
def __init__(self, server_address, RequestHandlerClass,
1906
interface=None, use_ipv6=True):
2547
"""If socketfd is set, use that file descriptor instead of
2548
creating a new one with socket.socket().
1907
2550
self.interface = interface
1909
2552
self.address_family = socket.AF_INET6
2553
if socketfd is not None:
2554
# Save the file descriptor
2555
self.socketfd = socketfd
2556
# Save the original socket.socket() function
2557
self.socket_socket = socket.socket
2559
# To implement --socket, we monkey patch socket.socket.
2561
# (When socketserver.TCPServer is a new-style class, we
2562
# could make self.socket into a property instead of monkey
2563
# patching socket.socket.)
2565
# Create a one-time-only replacement for socket.socket()
2566
@functools.wraps(socket.socket)
2567
def socket_wrapper(*args, **kwargs):
2568
# Restore original function so subsequent calls are
2570
socket.socket = self.socket_socket
2571
del self.socket_socket
2572
# This time only, return a new socket object from the
2573
# saved file descriptor.
2574
return socket.fromfd(self.socketfd, *args, **kwargs)
2575
# Replace socket.socket() function with wrapper
2576
socket.socket = socket_wrapper
2577
# The socketserver.TCPServer.__init__ will call
2578
# socket.socket(), which might be our replacement,
2579
# socket_wrapper(), if socketfd was set.
1910
2580
socketserver.TCPServer.__init__(self, server_address,
1911
2581
RequestHandlerClass)
1912
2583
def server_bind(self):
1913
2584
"""This overrides the normal server_bind() function
1914
2585
to bind to an interface if one was specified, and also NOT to
1915
2586
bind to an address or port if they were not specified."""
2587
global SO_BINDTODEVICE
1916
2588
if self.interface is not None:
1917
2589
if SO_BINDTODEVICE is None:
1918
logger.error("SO_BINDTODEVICE does not exist;"
1919
" cannot bind to interface %s",
1923
self.socket.setsockopt(socket.SOL_SOCKET,
1927
except socket.error as error:
1928
if error[0] == errno.EPERM:
1929
logger.error("No permission to"
1930
" bind to interface %s",
1932
elif error[0] == errno.ENOPROTOOPT:
1933
logger.error("SO_BINDTODEVICE not available;"
1934
" cannot bind to interface %s",
2590
# Fall back to a hard-coded value which seems to be
2592
logger.warning("SO_BINDTODEVICE not found, trying 25")
2593
SO_BINDTODEVICE = 25
2595
self.socket.setsockopt(
2596
socket.SOL_SOCKET, SO_BINDTODEVICE,
2597
(self.interface + "\0").encode("utf-8"))
2598
except socket.error as error:
2599
if error.errno == errno.EPERM:
2600
logger.error("No permission to bind to"
2601
" interface %s", self.interface)
2602
elif error.errno == errno.ENOPROTOOPT:
2603
logger.error("SO_BINDTODEVICE not available;"
2604
" cannot bind to interface %s",
2606
elif error.errno == errno.ENODEV:
2607
logger.error("Interface %s does not exist,"
2608
" cannot bind", self.interface)
1938
2611
# Only bind(2) the socket if we really need to.
1939
2612
if self.server_address[0] or self.server_address[1]:
2613
if self.server_address[1]:
2614
self.allow_reuse_address = True
1940
2615
if not self.server_address[0]:
1941
2616
if self.address_family == socket.AF_INET6:
1942
any_address = "::" # in6addr_any
2617
any_address = "::" # in6addr_any
1944
any_address = socket.INADDR_ANY
2619
any_address = "0.0.0.0" # INADDR_ANY
1945
2620
self.server_address = (any_address,
1946
2621
self.server_address[1])
1947
2622
elif not self.server_address[1]:
1948
self.server_address = (self.server_address[0],
2623
self.server_address = (self.server_address[0], 0)
1950
2624
# if self.interface:
1951
2625
# self.server_address = (self.server_address[0],
1977
2656
self.gnutls_priority = gnutls_priority
1978
2657
IPv6_TCPServer.__init__(self, server_address,
1979
2658
RequestHandlerClass,
1980
interface = interface,
1981
use_ipv6 = use_ipv6)
2659
interface=interface,
1982
2663
def server_activate(self):
1983
2664
if self.enabled:
1984
2665
return socketserver.TCPServer.server_activate(self)
1986
2667
def enable(self):
1987
2668
self.enabled = True
1989
2670
def add_pipe(self, parent_pipe, proc):
1990
2671
# Call "handle_ipc" for both data and EOF events
1991
gobject.io_add_watch(parent_pipe.fileno(),
1992
gobject.IO_IN | gobject.IO_HUP,
1993
functools.partial(self.handle_ipc,
1998
def handle_ipc(self, source, condition, parent_pipe=None,
1999
proc = None, client_object=None):
2673
parent_pipe.fileno(),
2674
GLib.IO_IN | GLib.IO_HUP,
2675
functools.partial(self.handle_ipc,
2676
parent_pipe=parent_pipe,
2679
def handle_ipc(self, source, condition,
2682
client_object=None):
2000
2683
# error, or the other end of multiprocessing.Pipe has closed
2001
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2684
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2002
2685
# Wait for other process to exit
2006
2689
# Read a request from the child
2007
2690
request = parent_pipe.recv()
2008
2691
command = request[0]
2010
2693
if command == 'init':
2012
address = request[2]
2014
for c in self.clients.itervalues():
2015
if c.fingerprint == fpr:
2694
key_id = request[1].decode("ascii")
2695
fpr = request[2].decode("ascii")
2696
address = request[3]
2698
for c in self.clients.values():
2699
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2701
if key_id and c.key_id == key_id:
2704
if fpr and c.fingerprint == fpr:
2019
logger.info("Client not found for fingerprint: %s, ad"
2020
"dress: %s", fpr, address)
2708
logger.info("Client not found for key ID: %s, address"
2709
": %s", key_id or fpr, address)
2021
2710
if self.use_dbus:
2022
2711
# Emit D-Bus signal
2023
mandos_dbus_service.ClientNotFound(fpr,
2712
mandos_dbus_service.ClientNotFound(key_id or fpr,
2025
2714
parent_pipe.send(False)
2028
gobject.io_add_watch(parent_pipe.fileno(),
2029
gobject.IO_IN | gobject.IO_HUP,
2030
functools.partial(self.handle_ipc,
2718
parent_pipe.fileno(),
2719
GLib.IO_IN | GLib.IO_HUP,
2720
functools.partial(self.handle_ipc,
2721
parent_pipe=parent_pipe,
2723
client_object=client))
2036
2724
parent_pipe.send(True)
2037
2725
# remove the old hook in favor of the new above hook on
2041
2729
funcname = request[1]
2042
2730
args = request[2]
2043
2731
kwargs = request[3]
2045
2733
parent_pipe.send(('data', getattr(client_object,
2046
2734
funcname)(*args,
2049
2737
if command == 'getattr':
2050
2738
attrname = request[1]
2051
if callable(client_object.__getattribute__(attrname)):
2052
parent_pipe.send(('function',))
2739
if isinstance(client_object.__getattribute__(attrname),
2740
collections.Callable):
2741
parent_pipe.send(('function', ))
2054
parent_pipe.send(('data', client_object
2055
.__getattribute__(attrname)))
2744
'data', client_object.__getattribute__(attrname)))
2057
2746
if command == 'setattr':
2058
2747
attrname = request[1]
2059
2748
value = request[2]
2060
2749
setattr(client_object, attrname, value)
2754
def rfc3339_duration_to_delta(duration):
2755
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2757
>>> rfc3339_duration_to_delta("P7D")
2758
datetime.timedelta(7)
2759
>>> rfc3339_duration_to_delta("PT60S")
2760
datetime.timedelta(0, 60)
2761
>>> rfc3339_duration_to_delta("PT60M")
2762
datetime.timedelta(0, 3600)
2763
>>> rfc3339_duration_to_delta("PT24H")
2764
datetime.timedelta(1)
2765
>>> rfc3339_duration_to_delta("P1W")
2766
datetime.timedelta(7)
2767
>>> rfc3339_duration_to_delta("PT5M30S")
2768
datetime.timedelta(0, 330)
2769
>>> rfc3339_duration_to_delta("P1DT3M20S")
2770
datetime.timedelta(1, 200)
2773
# Parsing an RFC 3339 duration with regular expressions is not
2774
# possible - there would have to be multiple places for the same
2775
# values, like seconds. The current code, while more esoteric, is
2776
# cleaner without depending on a parsing library. If Python had a
2777
# built-in library for parsing we would use it, but we'd like to
2778
# avoid excessive use of external libraries.
2780
# New type for defining tokens, syntax, and semantics all-in-one
2781
Token = collections.namedtuple("Token", (
2782
"regexp", # To match token; if "value" is not None, must have
2783
# a "group" containing digits
2784
"value", # datetime.timedelta or None
2785
"followers")) # Tokens valid after this token
2786
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2787
# the "duration" ABNF definition in RFC 3339, Appendix A.
2788
token_end = Token(re.compile(r"$"), None, frozenset())
2789
token_second = Token(re.compile(r"(\d+)S"),
2790
datetime.timedelta(seconds=1),
2791
frozenset((token_end, )))
2792
token_minute = Token(re.compile(r"(\d+)M"),
2793
datetime.timedelta(minutes=1),
2794
frozenset((token_second, token_end)))
2795
token_hour = Token(re.compile(r"(\d+)H"),
2796
datetime.timedelta(hours=1),
2797
frozenset((token_minute, token_end)))
2798
token_time = Token(re.compile(r"T"),
2800
frozenset((token_hour, token_minute,
2802
token_day = Token(re.compile(r"(\d+)D"),
2803
datetime.timedelta(days=1),
2804
frozenset((token_time, token_end)))
2805
token_month = Token(re.compile(r"(\d+)M"),
2806
datetime.timedelta(weeks=4),
2807
frozenset((token_day, token_end)))
2808
token_year = Token(re.compile(r"(\d+)Y"),
2809
datetime.timedelta(weeks=52),
2810
frozenset((token_month, token_end)))
2811
token_week = Token(re.compile(r"(\d+)W"),
2812
datetime.timedelta(weeks=1),
2813
frozenset((token_end, )))
2814
token_duration = Token(re.compile(r"P"), None,
2815
frozenset((token_year, token_month,
2816
token_day, token_time,
2818
# Define starting values:
2820
value = datetime.timedelta()
2822
# Following valid tokens
2823
followers = frozenset((token_duration, ))
2824
# String left to parse
2826
# Loop until end token is found
2827
while found_token is not token_end:
2828
# Search for any currently valid tokens
2829
for token in followers:
2830
match = token.regexp.match(s)
2831
if match is not None:
2833
if token.value is not None:
2834
# Value found, parse digits
2835
factor = int(match.group(1), 10)
2836
# Add to value so far
2837
value += factor * token.value
2838
# Strip token from string
2839
s = token.regexp.sub("", s, 1)
2842
# Set valid next tokens
2843
followers = found_token.followers
2846
# No currently valid tokens were found
2847
raise ValueError("Invalid RFC 3339 duration: {!r}"
2065
2853
def string_to_delta(interval):
2066
2854
"""Parse a string and return a datetime.timedelta
2068
2856
>>> string_to_delta('7d')
2069
2857
datetime.timedelta(7)
2070
2858
>>> string_to_delta('60s')
2160
2953
parser.add_argument("--no-dbus", action="store_false",
2161
2954
dest="use_dbus", help="Do not provide D-Bus"
2162
" system bus interface")
2955
" system bus interface", default=None)
2163
2956
parser.add_argument("--no-ipv6", action="store_false",
2164
dest="use_ipv6", help="Do not use IPv6")
2957
dest="use_ipv6", help="Do not use IPv6",
2165
2959
parser.add_argument("--no-restore", action="store_false",
2166
2960
dest="restore", help="Do not restore stored"
2961
" state", default=None)
2962
parser.add_argument("--socket", type=int,
2963
help="Specify a file descriptor to a network"
2964
" socket to use instead of creating one")
2168
2965
parser.add_argument("--statedir", metavar="DIR",
2169
2966
help="Directory to save/restore state in")
2967
parser.add_argument("--foreground", action="store_true",
2968
help="Run in foreground", default=None)
2969
parser.add_argument("--no-zeroconf", action="store_false",
2970
dest="zeroconf", help="Do not use Zeroconf",
2171
2973
options = parser.parse_args()
2173
2975
if options.check:
2977
fail_count, test_count = doctest.testmod()
2978
sys.exit(os.EX_OK if fail_count == 0 else 1)
2178
2980
# Default values for config file for server-global settings
2179
server_defaults = { "interface": "",
2184
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2185
"servicename": "Mandos",
2190
"statedir": "/var/lib/mandos"
2981
if gnutls.has_rawpk:
2982
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2983
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2985
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2986
":+SIGN-DSA-SHA256")
2987
server_defaults = {"interface": "",
2991
"priority": priority,
2992
"servicename": "Mandos",
2998
"statedir": "/var/lib/mandos",
2999
"foreground": "False",
2193
3004
# Parse config file for server-global settings
2194
server_config = configparser.SafeConfigParser(server_defaults)
3005
server_config = configparser.ConfigParser(server_defaults)
2195
3006
del server_defaults
2196
server_config.read(os.path.join(options.configdir,
2198
# Convert the SafeConfigParser object to a dict
3007
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3008
# Convert the ConfigParser object to a dict
2199
3009
server_settings = server_config.defaults()
2200
3010
# Use the appropriate methods on the non-string config options
2201
for option in ("debug", "use_dbus", "use_ipv6"):
3011
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3012
"foreground", "zeroconf"):
2202
3013
server_settings[option] = server_config.getboolean("DEFAULT",
2204
3015
if server_settings["port"]:
2205
3016
server_settings["port"] = server_config.getint("DEFAULT",
3018
if server_settings["socket"]:
3019
server_settings["socket"] = server_config.getint("DEFAULT",
3021
# Later, stdin will, and stdout and stderr might, be dup'ed
3022
# over with an opened os.devnull. But we don't want this to
3023
# happen with a supplied network socket.
3024
if 0 <= server_settings["socket"] <= 2:
3025
server_settings["socket"] = os.dup(server_settings
2207
3027
del server_config
2209
3029
# Override the settings from the config file with command line
2210
3030
# options, if set.
2211
3031
for option in ("interface", "address", "port", "debug",
2212
"priority", "servicename", "configdir",
2213
"use_dbus", "use_ipv6", "debuglevel", "restore",
3032
"priority", "servicename", "configdir", "use_dbus",
3033
"use_ipv6", "debuglevel", "restore", "statedir",
3034
"socket", "foreground", "zeroconf"):
2215
3035
value = getattr(options, option)
2216
3036
if value is not None:
2217
3037
server_settings[option] = value
2219
3039
# Force all strings to be unicode
2220
3040
for option in server_settings.keys():
2221
if type(server_settings[option]) is str:
2222
server_settings[option] = unicode(server_settings[option])
3041
if isinstance(server_settings[option], bytes):
3042
server_settings[option] = (server_settings[option]
3044
# Force all boolean options to be boolean
3045
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3046
"foreground", "zeroconf"):
3047
server_settings[option] = bool(server_settings[option])
3048
# Debug implies foreground
3049
if server_settings["debug"]:
3050
server_settings["foreground"] = True
2223
3051
# Now we have our good server settings in "server_settings"
2225
3053
##################################################################
3055
if (not server_settings["zeroconf"]
3056
and not (server_settings["port"]
3057
or server_settings["socket"] != "")):
3058
parser.error("Needs port or socket to work without Zeroconf")
2227
3060
# For convenience
2228
3061
debug = server_settings["debug"]
2229
3062
debuglevel = server_settings["debuglevel"]
3131
logger.debug("Did setuid/setgid to {}:{}".format(uid,
2290
3133
except OSError as error:
2291
if error[0] != errno.EPERM:
3134
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3135
.format(uid, gid, os.strerror(error.errno)))
3136
if error.errno != errno.EPERM:
2295
3140
# Enable all possible GnuTLS debugging
2297
3142
# "Use a log level over 10 to enable all debugging options."
2298
3143
# - GnuTLS manual
2299
gnutls.library.functions.gnutls_global_set_log_level(11)
2301
@gnutls.library.types.gnutls_log_func
3144
gnutls.global_set_log_level(11)
2302
3147
def debug_gnutls(level, string):
2303
3148
logger.debug("GnuTLS: %s", string[:-1])
2305
(gnutls.library.functions
2306
.gnutls_global_set_log_function(debug_gnutls))
3150
gnutls.global_set_log_function(debug_gnutls)
2308
3152
# Redirect stdin so all checkers get /dev/null
2309
3153
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2310
3154
os.dup2(null, sys.stdin.fileno())
2314
3158
# Need to fork before connecting to D-Bus
2316
3160
# Close all input and output, do double fork, etc.
2319
gobject.threads_init()
3163
if gi.version_info < (3, 10, 2):
3164
# multiprocessing will use threads, so before we use GLib we
3165
# need to inform GLib that threads will be used.
2321
3168
global main_loop
2322
3169
# From the Avahi example code
2323
3170
DBusGMainLoop(set_as_default=True)
2324
main_loop = gobject.MainLoop()
3171
main_loop = GLib.MainLoop()
2325
3172
bus = dbus.SystemBus()
2326
3173
# End of Avahi example code
2329
3176
bus_name = dbus.service.BusName("se.recompile.Mandos",
2330
bus, do_not_queue=True)
2331
old_bus_name = (dbus.service.BusName
2332
("se.bsnet.fukt.Mandos", bus,
2334
except dbus.exceptions.NameExistsException as e:
3179
old_bus_name = dbus.service.BusName(
3180
"se.bsnet.fukt.Mandos", bus,
3182
except dbus.exceptions.DBusException as e:
2335
3183
logger.error("Disabling D-Bus:", exc_info=e)
2336
3184
use_dbus = False
2337
3185
server_settings["use_dbus"] = False
2338
3186
tcp_server.use_dbus = False
2339
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2340
service = AvahiServiceToSyslog(name =
2341
server_settings["servicename"],
2342
servicetype = "_mandos._tcp",
2343
protocol = protocol, bus = bus)
2344
if server_settings["interface"]:
2345
service.interface = (if_nametoindex
2346
(str(server_settings["interface"])))
3188
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3189
service = AvahiServiceToSyslog(
3190
name=server_settings["servicename"],
3191
servicetype="_mandos._tcp",
3194
if server_settings["interface"]:
3195
service.interface = if_nametoindex(
3196
server_settings["interface"].encode("utf-8"))
2348
3198
global multiprocessing_manager
2349
3199
multiprocessing_manager = multiprocessing.Manager()
2351
3201
client_class = Client
2353
client_class = functools.partial(ClientDBus, bus = bus)
3203
client_class = functools.partial(ClientDBus, bus=bus)
2355
3205
client_settings = Client.config_parser(client_config)
2356
3206
old_client_settings = {}
2357
3207
clients_data = {}
3209
# This is used to redirect stdout and stderr for checker processes
3211
wnull = open(os.devnull, "w") # A writable /dev/null
3212
# Only used if server is running in foreground but not in debug
3214
if debug or not foreground:
2359
3217
# Get client data and settings from last running state.
2360
3218
if server_settings["restore"]:
2362
3220
with open(stored_state_path, "rb") as stored_state:
2363
clients_data, old_client_settings = (pickle.load
3221
if sys.version_info.major == 2:
3222
clients_data, old_client_settings = pickle.load(
3225
bytes_clients_data, bytes_old_client_settings = (
3226
pickle.load(stored_state, encoding="bytes"))
3227
# Fix bytes to strings
3230
clients_data = {(key.decode("utf-8")
3231
if isinstance(key, bytes)
3234
bytes_clients_data.items()}
3235
del bytes_clients_data
3236
for key in clients_data:
3237
value = {(k.decode("utf-8")
3238
if isinstance(k, bytes) else k): v
3240
clients_data[key].items()}
3241
clients_data[key] = value
3243
value["client_structure"] = [
3245
if isinstance(s, bytes)
3247
value["client_structure"]]
3249
for k in ("name", "host"):
3250
if isinstance(value[k], bytes):
3251
value[k] = value[k].decode("utf-8")
3252
if "key_id" not in value:
3253
value["key_id"] = ""
3254
elif "fingerprint" not in value:
3255
value["fingerprint"] = ""
3256
# old_client_settings
3258
old_client_settings = {
3259
(key.decode("utf-8")
3260
if isinstance(key, bytes)
3263
bytes_old_client_settings.items()}
3264
del bytes_old_client_settings
3266
for value in old_client_settings.values():
3267
if isinstance(value["host"], bytes):
3268
value["host"] = (value["host"]
2365
3270
os.remove(stored_state_path)
2366
3271
except IOError as e:
2367
3272
if e.errno == errno.ENOENT:
2368
logger.warning("Could not load persistent state: {0}"
2369
.format(os.strerror(e.errno)))
3273
logger.warning("Could not load persistent state:"
3274
" {}".format(os.strerror(e.errno)))
2371
3276
logger.critical("Could not load persistent state:",
2374
3279
except EOFError as e:
2375
3280
logger.warning("Could not load persistent state: "
2376
"EOFError:", exc_info=e)
2378
3284
with PGPEngine() as pgp:
2379
for client_name, client in clients_data.iteritems():
3285
for client_name, client in clients_data.items():
3286
# Skip removed clients
3287
if client_name not in client_settings:
2380
3290
# Decide which value to use after restoring saved state.
2381
3291
# We have three different values: Old config file,
2382
3292
# new config file, and saved state.
2440
3350
for client_name in (set(client_settings)
2441
3351
- set(old_client_settings)):
2442
3352
clients_data[client_name] = client_settings[client_name]
2444
3354
# Create all client objects
2445
for client_name, client in clients_data.iteritems():
3355
for client_name, client in clients_data.items():
2446
3356
tcp_server.clients[client_name] = client_class(
2447
name = client_name, settings = client)
3359
server_settings=server_settings)
2449
3361
if not tcp_server.clients:
2450
3362
logger.warning("No clients defined")
2456
pidfile.write(str(pid) + "\n".encode("utf-8"))
2459
logger.error("Could not write to file %r with PID %d",
2462
# "pidfile" was never created
3365
if pidfile is not None:
3369
print(pid, file=pidfile)
3371
logger.error("Could not write to file %r with PID %d",
2464
3374
del pidfilename
2465
signal.signal(signal.SIGINT, signal.SIG_IGN)
2467
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2468
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3376
for termsig in (signal.SIGHUP, signal.SIGTERM):
3377
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3378
lambda: main_loop.quit() and False)
2471
@alternate_dbus_interfaces({"se.recompile.Mandos":
2472
"se.bsnet.fukt.Mandos"})
2473
class MandosDBusService(DBusObjectWithProperties):
3382
@alternate_dbus_interfaces(
3383
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3384
class MandosDBusService(DBusObjectWithObjectManager):
2474
3385
"""A D-Bus proxy object"""
2475
3387
def __init__(self):
2476
3388
dbus.service.Object.__init__(self, bus, "/")
2477
3390
_interface = "se.recompile.Mandos"
2479
@dbus_interface_annotations(_interface)
2481
return { "org.freedesktop.DBus.Property"
2482
".EmitsChangedSignal":
2485
3392
@dbus.service.signal(_interface, signature="o")
2486
3393
def ClientAdded(self, objpath):
2490
3397
@dbus.service.signal(_interface, signature="ss")
2491
def ClientNotFound(self, fingerprint, address):
3398
def ClientNotFound(self, key_id, address):
3402
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2495
3404
@dbus.service.signal(_interface, signature="os")
2496
3405
def ClientRemoved(self, objpath, name):
3409
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2500
3411
@dbus.service.method(_interface, out_signature="ao")
2501
3412
def GetAllClients(self):
2503
return dbus.Array(c.dbus_object_path
2505
tcp_server.clients.itervalues())
3414
return dbus.Array(c.dbus_object_path for c in
3415
tcp_server.clients.values())
3417
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2507
3419
@dbus.service.method(_interface,
2508
3420
out_signature="a{oa{sv}}")
2509
3421
def GetAllClientsWithProperties(self):
2511
3423
return dbus.Dictionary(
2512
((c.dbus_object_path, c.GetAll(""))
2513
for c in tcp_server.clients.itervalues()),
3424
{c.dbus_object_path: c.GetAll(
3425
"se.recompile.Mandos.Client")
3426
for c in tcp_server.clients.values()},
2514
3427
signature="oa{sv}")
2516
3429
@dbus.service.method(_interface, in_signature="o")
2517
3430
def RemoveClient(self, object_path):
2519
for c in tcp_server.clients.itervalues():
3432
for c in tcp_server.clients.values():
2520
3433
if c.dbus_object_path == object_path:
2521
3434
del tcp_server.clients[c.name]
2522
3435
c.remove_from_connection()
2523
# Don't signal anything except ClientRemoved
3436
# Don't signal the disabling
2524
3437
c.disable(quiet=True)
2526
self.ClientRemoved(object_path, c.name)
3438
# Emit D-Bus signal for removal
3439
self.client_removed_signal(c)
2528
3441
raise KeyError(object_path)
3445
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3446
out_signature="a{oa{sa{sv}}}")
3447
def GetManagedObjects(self):
3449
return dbus.Dictionary(
3450
{client.dbus_object_path:
3452
{interface: client.GetAll(interface)
3454
client._get_all_interface_names()})
3455
for client in tcp_server.clients.values()})
3457
def client_added_signal(self, client):
3458
"""Send the new standard signal and the old signal"""
3460
# New standard signal
3461
self.InterfacesAdded(
3462
client.dbus_object_path,
3464
{interface: client.GetAll(interface)
3466
client._get_all_interface_names()}))
3468
self.ClientAdded(client.dbus_object_path)
3470
def client_removed_signal(self, client):
3471
"""Send the new standard signal and the old signal"""
3473
# New standard signal
3474
self.InterfacesRemoved(
3475
client.dbus_object_path,
3476
client._get_all_interface_names())
3478
self.ClientRemoved(client.dbus_object_path,
2532
3481
mandos_dbus_service = MandosDBusService()
3483
# Save modules to variables to exempt the modules from being
3484
# unloaded before the function registered with atexit() is run.
3485
mp = multiprocessing
2535
3489
"Cleanup function; run on exit"
2538
multiprocessing.active_children()
3493
mp.active_children()
2539
3495
if not (tcp_server.clients or client_settings):
2542
3498
# Store client before exiting. Secrets are encrypted with key
2543
3499
# based on what config file has. If config file is
2544
3500
# removed/edited, old secret will thus be unrecovable.
2546
3502
with PGPEngine() as pgp:
2547
for client in tcp_server.clients.itervalues():
3503
for client in tcp_server.clients.values():
2548
3504
key = client_settings[client.name]["secret"]
2549
3505
client.encrypted_secret = pgp.encrypt(client.secret,
2551
3507
client_dict = {}
2553
3509
# A list of attributes that can not be pickled
2555
exclude = set(("bus", "changedstate", "secret",
2557
for name, typ in (inspect.getmembers
2558
(dbus.service.Object)):
3511
exclude = {"bus", "changedstate", "secret",
3512
"checker", "server_settings"}
3513
for name, typ in inspect.getmembers(dbus.service
2559
3515
exclude.add(name)
2561
3517
client_dict["encrypted_secret"] = (client
2562
3518
.encrypted_secret)
2563
3519
for attr in client.client_structure:
2564
3520
if attr not in exclude:
2565
3521
client_dict[attr] = getattr(client, attr)
2567
3523
clients[client.name] = client_dict
2568
3524
del client_settings[client.name]["secret"]
2571
with (tempfile.NamedTemporaryFile
2572
(mode='wb', suffix=".pickle", prefix='clients-',
2573
dir=os.path.dirname(stored_state_path),
2574
delete=False)) as stored_state:
2575
pickle.dump((clients, client_settings), stored_state)
2576
tempname=stored_state.name
3527
with tempfile.NamedTemporaryFile(
3531
dir=os.path.dirname(stored_state_path),
3532
delete=False) as stored_state:
3533
pickle.dump((clients, client_settings), stored_state,
3535
tempname = stored_state.name
2577
3536
os.rename(tempname, stored_state_path)
2578
3537
except (IOError, OSError) as e: