63
import cPickle as pickle
70
import cPickle as pickle
64
73
import multiprocessing
70
82
import dbus.service
83
from gi.repository import GLib
73
84
from dbus.mainloop.glib import DBusGMainLoop
76
87
import xml.dom.minidom
90
# Try to find the value of SO_BINDTODEVICE:
92
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
93
# newer, and it is also the most natural place for it:
81
94
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
82
95
except AttributeError:
97
# This is where SO_BINDTODEVICE was up to and including Python
84
99
from IN import SO_BINDTODEVICE
85
100
except ImportError:
86
SO_BINDTODEVICE = None
101
# In Python 2.7 it seems to have been removed entirely.
102
# Try running the C preprocessor:
104
cc = subprocess.Popen(["cc", "--language=c", "-E",
106
stdin=subprocess.PIPE,
107
stdout=subprocess.PIPE)
108
stdout = cc.communicate(
109
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
110
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
111
except (OSError, ValueError, IndexError):
113
SO_BINDTODEVICE = None
115
if sys.version_info.major == 2:
89
119
stored_state_file = "clients.pickle"
91
121
logger = logging.getLogger()
92
syslogger = (logging.handlers.SysLogHandler
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
94
address = str("/dev/log")))
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
125
if_nametoindex = ctypes.cdll.LoadLibrary(
126
ctypes.util.find_library("c")).if_nametoindex
100
127
except (OSError, AttributeError):
101
129
def if_nametoindex(interface):
102
130
"Get an interface index the hard way, i.e. using fcntl()"
103
131
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
132
with contextlib.closing(socket.socket()) as s:
105
133
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
108
interface_index = struct.unpack(str("I"),
134
struct.pack(b"16s16x", interface))
135
interface_index = struct.unpack("I", ifreq[16:20])[0]
110
136
return interface_index
113
def initlogger(level=logging.WARNING):
139
def copy_function(func):
140
"""Make a copy of a function"""
141
if sys.version_info.major == 2:
142
return types.FunctionType(func.func_code,
148
return types.FunctionType(func.__code__,
155
def initlogger(debug, level=logging.WARNING):
114
156
"""init logger and add loglevel"""
159
syslogger = (logging.handlers.SysLogHandler(
160
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
116
162
syslogger.setFormatter(logging.Formatter
117
163
('Mandos [%(process)d]: %(levelname)s:'
119
165
logger.addHandler(syslogger)
121
console = logging.StreamHandler()
122
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
126
logger.addHandler(console)
168
console = logging.StreamHandler()
169
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
173
logger.addHandler(console)
127
174
logger.setLevel(level)
166
226
os.rmdir(self.tempdir)
167
227
self.tempdir = None
169
229
def password_encode(self, password):
170
230
# Passphrase can not be empty and can not contain newlines or
171
231
# NUL bytes. So we prefix it and hex encode it.
172
return b"mandos" + binascii.hexlify(password)
232
encoded = b"mandos" + binascii.hexlify(password)
233
if len(encoded) > 2048:
234
# GnuPG can't handle long passwords, so encode differently
235
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
236
.replace(b"\n", b"\\n")
237
.replace(b"\0", b"\\x00"))
174
240
def encrypt(self, data, password):
175
self.gnupg.passphrase = self.password_encode(password)
176
with open(os.devnull) as devnull:
178
proc = self.gnupg.run(['--symmetric'],
179
create_fhs=['stdin', 'stdout'],
180
attach_fhs={'stderr': devnull})
181
with contextlib.closing(proc.handles['stdin']) as f:
183
with contextlib.closing(proc.handles['stdout']) as f:
184
ciphertext = f.read()
188
self.gnupg.passphrase = None
241
passphrase = self.password_encode(password)
242
with tempfile.NamedTemporaryFile(
243
dir=self.tempdir) as passfile:
244
passfile.write(passphrase)
246
proc = subprocess.Popen([self.gpg, '--symmetric',
250
stdin=subprocess.PIPE,
251
stdout=subprocess.PIPE,
252
stderr=subprocess.PIPE)
253
ciphertext, err = proc.communicate(input=data)
254
if proc.returncode != 0:
189
256
return ciphertext
191
258
def decrypt(self, data, password):
192
self.gnupg.passphrase = self.password_encode(password)
193
with open(os.devnull) as devnull:
195
proc = self.gnupg.run(['--decrypt'],
196
create_fhs=['stdin', 'stdout'],
197
attach_fhs={'stderr': devnull})
198
with contextlib.closing(proc.handles['stdin'] ) as f:
200
with contextlib.closing(proc.handles['stdout']) as f:
201
decrypted_plaintext = f.read()
205
self.gnupg.passphrase = None
259
passphrase = self.password_encode(password)
260
with tempfile.NamedTemporaryFile(
261
dir=self.tempdir) as passfile:
262
passfile.write(passphrase)
264
proc = subprocess.Popen([self.gpg, '--decrypt',
268
stdin=subprocess.PIPE,
269
stdout=subprocess.PIPE,
270
stderr=subprocess.PIPE)
271
decrypted_plaintext, err = proc.communicate(input=data)
272
if proc.returncode != 0:
206
274
return decrypted_plaintext
277
# Pretend that we have an Avahi module
279
"""This isn't so much a class as it is a module-like namespace.
280
It is instantiated once, and simulates having an Avahi module."""
281
IF_UNSPEC = -1 # avahi-common/address.h
282
PROTO_UNSPEC = -1 # avahi-common/address.h
283
PROTO_INET = 0 # avahi-common/address.h
284
PROTO_INET6 = 1 # avahi-common/address.h
285
DBUS_NAME = "org.freedesktop.Avahi"
286
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
287
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
288
DBUS_PATH_SERVER = "/"
290
def string_array_to_txt_array(self, t):
291
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
292
for s in t), signature="ay")
293
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
294
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
295
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
296
SERVER_INVALID = 0 # avahi-common/defs.h
297
SERVER_REGISTERING = 1 # avahi-common/defs.h
298
SERVER_RUNNING = 2 # avahi-common/defs.h
299
SERVER_COLLISION = 3 # avahi-common/defs.h
300
SERVER_FAILURE = 4 # avahi-common/defs.h
210
304
class AvahiError(Exception):
211
305
def __init__(self, value, *args, **kwargs):
212
306
self.value = value
213
super(AvahiError, self).__init__(value, *args, **kwargs)
214
def __unicode__(self):
215
return unicode(repr(self.value))
307
return super(AvahiError, self).__init__(value, *args,
217
311
class AvahiServiceError(AvahiError):
220
315
class AvahiGroupError(AvahiError):
224
319
class AvahiService(object):
225
320
"""An Avahi (Zeroconf) service.
228
323
interface: integer; avahi.IF_UNSPEC or an interface index.
229
324
Used to optionally bind to the specified interface.
230
325
name: string; Example: 'Mandos'
231
326
type: string; Example: '_mandos._tcp'.
232
See <http://www.dns-sd.org/ServiceTypes.html>
327
See <https://www.iana.org/assignments/service-names-port-numbers>
233
328
port: integer; what port to announce
234
329
TXT: list of strings; TXT record for the service
235
330
domain: string; Domain to publish on, default to .local if empty.
364
489
follow_name_owner_changes=True),
365
490
avahi.DBUS_INTERFACE_SERVER)
366
491
self.server.connect_to_signal("StateChanged",
367
self.server_state_changed)
492
self.server_state_changed)
368
493
self.server_state_changed(self.server.GetState())
370
496
class AvahiServiceToSyslog(AvahiService):
497
def rename(self, *args, **kwargs):
372
498
"""Add the new name to the syslog messages"""
373
ret = AvahiService.rename(self)
374
syslogger.setFormatter(logging.Formatter
375
('Mandos (%s) [%%(process)d]:'
376
' %%(levelname)s: %%(message)s'
499
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
500
syslogger.setFormatter(logging.Formatter(
501
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
380
def timedelta_to_milliseconds(td):
381
"Convert a datetime.timedelta() to milliseconds"
382
return ((td.days * 24 * 60 * 60 * 1000)
383
+ (td.seconds * 1000)
384
+ (td.microseconds // 1000))
506
# Pretend that we have a GnuTLS module
507
class GnuTLS(object):
508
"""This isn't so much a class as it is a module-like namespace.
509
It is instantiated once, and simulates having a GnuTLS module."""
511
library = ctypes.util.find_library("gnutls")
513
library = ctypes.util.find_library("gnutls-deb0")
514
_library = ctypes.cdll.LoadLibrary(library)
516
_need_version = b"3.3.0"
517
_tls_rawpk_version = b"3.6.6"
520
# Need to use "self" here, since this method is called before
521
# the assignment to the "gnutls" global variable happens.
522
if self.check_version(self._need_version) is None:
523
raise self.Error("Needs GnuTLS {} or later"
524
.format(self._need_version))
526
# Unless otherwise indicated, the constants and types below are
527
# all from the gnutls/gnutls.h C header file.
538
E_NO_CERTIFICATE_FOUND = -49
543
KEYID_USE_SHA256 = 1 # gnutls/x509.h
544
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
547
class session_int(ctypes.Structure):
549
session_t = ctypes.POINTER(session_int)
551
class certificate_credentials_st(ctypes.Structure):
553
certificate_credentials_t = ctypes.POINTER(
554
certificate_credentials_st)
555
certificate_type_t = ctypes.c_int
557
class datum_t(ctypes.Structure):
558
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
559
('size', ctypes.c_uint)]
561
class openpgp_crt_int(ctypes.Structure):
563
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
564
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
565
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
566
credentials_type_t = ctypes.c_int
567
transport_ptr_t = ctypes.c_void_p
568
close_request_t = ctypes.c_int
571
class Error(Exception):
572
# We need to use the class name "GnuTLS" here, since this
573
# exception might be raised from within GnuTLS.__init__,
574
# which is called before the assignment to the "gnutls"
575
# global variable has happened.
576
def __init__(self, message=None, code=None, args=()):
577
# Default usage is by a message string, but if a return
578
# code is passed, convert it to a string with
581
if message is None and code is not None:
582
message = GnuTLS.strerror(code)
583
return super(GnuTLS.Error, self).__init__(
586
class CertificateSecurityError(Error):
590
class Credentials(object):
592
self._c_object = gnutls.certificate_credentials_t()
593
gnutls.certificate_allocate_credentials(
594
ctypes.byref(self._c_object))
595
self.type = gnutls.CRD_CERTIFICATE
598
gnutls.certificate_free_credentials(self._c_object)
600
class ClientSession(object):
601
def __init__(self, socket, credentials=None):
602
self._c_object = gnutls.session_t()
603
gnutls_flags = gnutls.CLIENT
604
if gnutls.check_version("3.5.6"):
605
gnutls_flags |= gnutls.NO_TICKETS
607
gnutls_flags |= gnutls.ENABLE_RAWPK
608
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
610
gnutls.set_default_priority(self._c_object)
611
gnutls.transport_set_ptr(self._c_object, socket.fileno())
612
gnutls.handshake_set_private_extensions(self._c_object,
615
if credentials is None:
616
credentials = gnutls.Credentials()
617
gnutls.credentials_set(self._c_object, credentials.type,
618
ctypes.cast(credentials._c_object,
620
self.credentials = credentials
623
gnutls.deinit(self._c_object)
626
return gnutls.handshake(self._c_object)
628
def send(self, data):
632
data_len -= gnutls.record_send(self._c_object,
637
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
639
# Error handling functions
640
def _error_code(result):
641
"""A function to raise exceptions on errors, suitable
642
for the 'restype' attribute on ctypes functions"""
645
if result == gnutls.E_NO_CERTIFICATE_FOUND:
646
raise gnutls.CertificateSecurityError(code=result)
647
raise gnutls.Error(code=result)
649
def _retry_on_error(result, func, arguments):
650
"""A function to retry on some errors, suitable
651
for the 'errcheck' attribute on ctypes functions"""
653
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
654
return _error_code(result)
655
result = func(*arguments)
658
# Unless otherwise indicated, the function declarations below are
659
# all from the gnutls/gnutls.h C header file.
662
priority_set_direct = _library.gnutls_priority_set_direct
663
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
664
ctypes.POINTER(ctypes.c_char_p)]
665
priority_set_direct.restype = _error_code
667
init = _library.gnutls_init
668
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
669
init.restype = _error_code
671
set_default_priority = _library.gnutls_set_default_priority
672
set_default_priority.argtypes = [session_t]
673
set_default_priority.restype = _error_code
675
record_send = _library.gnutls_record_send
676
record_send.argtypes = [session_t, ctypes.c_void_p,
678
record_send.restype = ctypes.c_ssize_t
679
record_send.errcheck = _retry_on_error
681
certificate_allocate_credentials = (
682
_library.gnutls_certificate_allocate_credentials)
683
certificate_allocate_credentials.argtypes = [
684
ctypes.POINTER(certificate_credentials_t)]
685
certificate_allocate_credentials.restype = _error_code
687
certificate_free_credentials = (
688
_library.gnutls_certificate_free_credentials)
689
certificate_free_credentials.argtypes = [
690
certificate_credentials_t]
691
certificate_free_credentials.restype = None
693
handshake_set_private_extensions = (
694
_library.gnutls_handshake_set_private_extensions)
695
handshake_set_private_extensions.argtypes = [session_t,
697
handshake_set_private_extensions.restype = None
699
credentials_set = _library.gnutls_credentials_set
700
credentials_set.argtypes = [session_t, credentials_type_t,
702
credentials_set.restype = _error_code
704
strerror = _library.gnutls_strerror
705
strerror.argtypes = [ctypes.c_int]
706
strerror.restype = ctypes.c_char_p
708
certificate_type_get = _library.gnutls_certificate_type_get
709
certificate_type_get.argtypes = [session_t]
710
certificate_type_get.restype = _error_code
712
certificate_get_peers = _library.gnutls_certificate_get_peers
713
certificate_get_peers.argtypes = [session_t,
714
ctypes.POINTER(ctypes.c_uint)]
715
certificate_get_peers.restype = ctypes.POINTER(datum_t)
717
global_set_log_level = _library.gnutls_global_set_log_level
718
global_set_log_level.argtypes = [ctypes.c_int]
719
global_set_log_level.restype = None
721
global_set_log_function = _library.gnutls_global_set_log_function
722
global_set_log_function.argtypes = [log_func]
723
global_set_log_function.restype = None
725
deinit = _library.gnutls_deinit
726
deinit.argtypes = [session_t]
727
deinit.restype = None
729
handshake = _library.gnutls_handshake
730
handshake.argtypes = [session_t]
731
handshake.restype = _error_code
732
handshake.errcheck = _retry_on_error
734
transport_set_ptr = _library.gnutls_transport_set_ptr
735
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
736
transport_set_ptr.restype = None
738
bye = _library.gnutls_bye
739
bye.argtypes = [session_t, close_request_t]
740
bye.restype = _error_code
741
bye.errcheck = _retry_on_error
743
check_version = _library.gnutls_check_version
744
check_version.argtypes = [ctypes.c_char_p]
745
check_version.restype = ctypes.c_char_p
747
has_rawpk = bool(check_version(_tls_rawpk_version))
751
class pubkey_st(ctypes.Structure):
753
pubkey_t = ctypes.POINTER(pubkey_st)
755
x509_crt_fmt_t = ctypes.c_int
757
# All the function declarations below are from gnutls/abstract.h
758
pubkey_init = _library.gnutls_pubkey_init
759
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
760
pubkey_init.restype = _error_code
762
pubkey_import = _library.gnutls_pubkey_import
763
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
765
pubkey_import.restype = _error_code
767
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
768
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
769
ctypes.POINTER(ctypes.c_ubyte),
770
ctypes.POINTER(ctypes.c_size_t)]
771
pubkey_get_key_id.restype = _error_code
773
pubkey_deinit = _library.gnutls_pubkey_deinit
774
pubkey_deinit.argtypes = [pubkey_t]
775
pubkey_deinit.restype = None
777
# All the function declarations below are from gnutls/openpgp.h
779
openpgp_crt_init = _library.gnutls_openpgp_crt_init
780
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
781
openpgp_crt_init.restype = _error_code
783
openpgp_crt_import = _library.gnutls_openpgp_crt_import
784
openpgp_crt_import.argtypes = [openpgp_crt_t,
785
ctypes.POINTER(datum_t),
787
openpgp_crt_import.restype = _error_code
789
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
790
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
791
ctypes.POINTER(ctypes.c_uint)]
792
openpgp_crt_verify_self.restype = _error_code
794
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
795
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
796
openpgp_crt_deinit.restype = None
798
openpgp_crt_get_fingerprint = (
799
_library.gnutls_openpgp_crt_get_fingerprint)
800
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
804
openpgp_crt_get_fingerprint.restype = _error_code
806
if check_version("3.6.4"):
807
certificate_type_get2 = _library.gnutls_certificate_type_get2
808
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
809
certificate_type_get2.restype = _error_code
811
# Remove non-public functions
812
del _error_code, _retry_on_error
813
# Create the global "gnutls" object, simulating a module
817
def call_pipe(connection, # : multiprocessing.Connection
818
func, *args, **kwargs):
819
"""This function is meant to be called by multiprocessing.Process
821
This function runs func(*args, **kwargs), and writes the resulting
822
return value on the provided multiprocessing.Connection.
824
connection.send(func(*args, **kwargs))
386
828
class Client(object):
387
829
"""A representation of a client host served by this server.
390
832
approved: bool(); 'None' if not yet approved/disapproved
391
833
approval_delay: datetime.timedelta(); Time to wait for approval
393
835
checker: subprocess.Popen(); a running checker process used
394
836
to see if the client lives.
395
837
'None' if no process is running.
396
checker_callback_tag: a gobject event source tag, or None
838
checker_callback_tag: a GLib event source tag, or None
397
839
checker_command: string; External command which is run to check
398
840
if client lives. %() expansions are done at
399
841
runtime with vars(self) as dict, so that for
400
842
instance %(name)s can be used in the command.
401
checker_initiator_tag: a gobject event source tag, or None
843
checker_initiator_tag: a GLib event source tag, or None
402
844
created: datetime.datetime(); (UTC) object creation
403
845
client_structure: Object describing what attributes a client has
404
846
and is used for storing the client at exit
405
847
current_checker_command: string; current running checker_command
406
disable_initiator_tag: a gobject event source tag, or None
848
disable_initiator_tag: a GLib event source tag, or None
408
850
fingerprint: string (40 or 32 hexadecimal digits); used to
409
uniquely identify the client
851
uniquely identify an OpenPGP client
852
key_id: string (64 hexadecimal digits); used to uniquely identify
853
a client using raw public keys
410
854
host: string; available for use by the checker command
411
855
interval: datetime.timedelta(); How often to start a new checker
412
856
last_approval_request: datetime.datetime(); (UTC) or None
413
857
last_checked_ok: datetime.datetime(); (UTC) or None
414
858
last_checker_status: integer between 0 and 255 reflecting exit
415
859
status of last checker. -1 reflects crashed
860
checker, -2 means no checker completed yet.
861
last_checker_signal: The signal which killed the last checker, if
862
last_checker_status is -1
417
863
last_enabled: datetime.datetime(); (UTC) or None
418
864
name: string; from the config file, used in log messages and
419
865
D-Bus identifiers
420
866
secret: bytestring; sent verbatim (over TLS) to client
421
867
timeout: datetime.timedelta(); How long from last_checked_ok
422
868
until this client is disabled
423
extended_timeout: extra long timeout when password has been sent
869
extended_timeout: extra long timeout when secret has been sent
424
870
runtime_expansions: Allowed attributes for runtime expansion.
425
871
expires: datetime.datetime(); time (UTC) when a client will be
426
872
disabled, or None
873
server_settings: The server_settings dict from main()
429
876
runtime_expansions = ("approval_delay", "approval_duration",
430
"created", "enabled", "fingerprint",
431
"host", "interval", "last_checked_ok",
877
"created", "enabled", "expires", "key_id",
878
"fingerprint", "host", "interval",
879
"last_approval_request", "last_checked_ok",
432
880
"last_enabled", "name", "timeout")
433
client_defaults = { "timeout": "5m",
434
"extended_timeout": "15m",
436
"checker": "fping -q -- %%(host)s",
438
"approval_delay": "0s",
439
"approval_duration": "1s",
440
"approved_by_default": "True",
444
def timeout_milliseconds(self):
445
"Return the 'timeout' attribute in milliseconds"
446
return timedelta_to_milliseconds(self.timeout)
448
def extended_timeout_milliseconds(self):
449
"Return the 'extended_timeout' attribute in milliseconds"
450
return timedelta_to_milliseconds(self.extended_timeout)
452
def interval_milliseconds(self):
453
"Return the 'interval' attribute in milliseconds"
454
return timedelta_to_milliseconds(self.interval)
456
def approval_delay_milliseconds(self):
457
return timedelta_to_milliseconds(self.approval_delay)
883
"extended_timeout": "PT15M",
885
"checker": "fping -q -- %%(host)s",
887
"approval_delay": "PT0S",
888
"approval_duration": "PT1S",
889
"approved_by_default": "True",
460
894
def config_parser(config):
461
""" Construct a new dict of client settings of this form:
895
"""Construct a new dict of client settings of this form:
462
896
{ client_name: {setting_name: value, ...}, ...}
463
with exceptions for any special settings as defined above"""
897
with exceptions for any special settings as defined above.
898
NOTE: Must be a pure function. Must return the same result
899
value given the same arguments.
465
902
for client_name in config.sections():
466
903
section = dict(config.items(client_name))
467
904
client = settings[client_name] = {}
469
906
client["host"] = section["host"]
470
907
# Reformat values from string types to Python types
471
908
client["approved_by_default"] = config.getboolean(
472
909
client_name, "approved_by_default")
473
client["enabled"] = config.getboolean(client_name, "enabled")
910
client["enabled"] = config.getboolean(client_name,
913
# Uppercase and remove spaces from key_id and fingerprint
914
# for later comparison purposes with return value from the
915
# key_id() and fingerprint() functions
916
client["key_id"] = (section.get("key_id", "").upper()
475
918
client["fingerprint"] = (section["fingerprint"].upper()
476
919
.replace(" ", ""))
477
920
if "secret" in section:
478
client["secret"] = section["secret"].decode("base64")
921
client["secret"] = codecs.decode(section["secret"]
479
924
elif "secfile" in section:
480
925
with open(os.path.expanduser(os.path.expandvars
481
926
(section["secfile"])),
482
927
"rb") as secfile:
483
928
client["secret"] = secfile.read()
485
raise TypeError("No secret or secfile for section %s"
930
raise TypeError("No secret or secfile for section {}"
487
932
client["timeout"] = string_to_delta(section["timeout"])
488
933
client["extended_timeout"] = string_to_delta(
489
934
section["extended_timeout"])
531
977
self.current_checker_command = None
532
978
self.approved = None
533
979
self.approvals_pending = 0
534
self.changedstate = (multiprocessing_manager
535
.Condition(multiprocessing_manager
537
self.client_structure = [attr for attr in
538
self.__dict__.iterkeys()
980
self.changedstate = multiprocessing_manager.Condition(
981
multiprocessing_manager.Lock())
982
self.client_structure = [attr
983
for attr in self.__dict__.keys()
539
984
if not attr.startswith("_")]
540
985
self.client_structure.append("client_structure")
542
for name, t in inspect.getmembers(type(self),
987
for name, t in inspect.getmembers(
988
type(self), lambda obj: isinstance(obj, property)):
546
989
if not name.startswith("_"):
547
990
self.client_structure.append(name)
549
992
# Send notice to process children that client state has changed
550
993
def send_changedstate(self):
551
994
with self.changedstate:
552
995
self.changedstate.notify_all()
554
997
def enable(self):
555
998
"""Start this client's checker and timeout hooks"""
556
999
if getattr(self, "enabled", False):
557
1000
# Already enabled
559
self.send_changedstate()
560
1002
self.expires = datetime.datetime.utcnow() + self.timeout
561
1003
self.enabled = True
562
1004
self.last_enabled = datetime.datetime.utcnow()
563
1005
self.init_checker()
1006
self.send_changedstate()
565
1008
def disable(self, quiet=True):
566
1009
"""Disable this client."""
567
1010
if not getattr(self, "enabled", False):
570
self.send_changedstate()
572
1013
logger.info("Disabling client %s", self.name)
573
if getattr(self, "disable_initiator_tag", False):
574
gobject.source_remove(self.disable_initiator_tag)
1014
if getattr(self, "disable_initiator_tag", None) is not None:
1015
GLib.source_remove(self.disable_initiator_tag)
575
1016
self.disable_initiator_tag = None
576
1017
self.expires = None
577
if getattr(self, "checker_initiator_tag", False):
578
gobject.source_remove(self.checker_initiator_tag)
1018
if getattr(self, "checker_initiator_tag", None) is not None:
1019
GLib.source_remove(self.checker_initiator_tag)
579
1020
self.checker_initiator_tag = None
580
1021
self.stop_checker()
581
1022
self.enabled = False
582
# Do not run this again if called by a gobject.timeout_add
1024
self.send_changedstate()
1025
# Do not run this again if called by a GLib.timeout_add
585
1028
def __del__(self):
588
1031
def init_checker(self):
589
1032
# Schedule a new checker to be started an 'interval' from now,
590
1033
# and every interval from then on.
591
self.checker_initiator_tag = (gobject.timeout_add
592
(self.interval_milliseconds(),
1034
if self.checker_initiator_tag is not None:
1035
GLib.source_remove(self.checker_initiator_tag)
1036
self.checker_initiator_tag = GLib.timeout_add(
1037
int(self.interval.total_seconds() * 1000),
594
1039
# Schedule a disable() when 'timeout' has passed
595
self.disable_initiator_tag = (gobject.timeout_add
596
(self.timeout_milliseconds(),
1040
if self.disable_initiator_tag is not None:
1041
GLib.source_remove(self.disable_initiator_tag)
1042
self.disable_initiator_tag = GLib.timeout_add(
1043
int(self.timeout.total_seconds() * 1000), self.disable)
598
1044
# Also start a new checker *right now*.
599
1045
self.start_checker()
601
def checker_callback(self, pid, condition, command):
1047
def checker_callback(self, source, condition, connection,
602
1049
"""The checker has completed, so take appropriate actions."""
603
1050
self.checker_callback_tag = None
604
1051
self.checker = None
605
if os.WIFEXITED(condition):
606
self.last_checker_status = os.WEXITSTATUS(condition)
1052
# Read return code from connection (see call_pipe)
1053
returncode = connection.recv()
1057
self.last_checker_status = returncode
1058
self.last_checker_signal = None
607
1059
if self.last_checker_status == 0:
608
1060
logger.info("Checker for %(name)s succeeded",
610
1062
self.checked_ok()
612
logger.info("Checker for %(name)s failed",
1064
logger.info("Checker for %(name)s failed", vars(self))
615
1066
self.last_checker_status = -1
1067
self.last_checker_signal = -returncode
616
1068
logger.warning("Checker for %(name)s crashed?",
619
def checked_ok(self, timeout=None):
620
"""Bump up the timeout for this client.
622
This should only be called when the client has been seen,
1072
def checked_ok(self):
1073
"""Assert that the client has been seen, alive and well."""
1074
self.last_checked_ok = datetime.datetime.utcnow()
1075
self.last_checker_status = 0
1076
self.last_checker_signal = None
1079
def bump_timeout(self, timeout=None):
1080
"""Bump up the timeout for this client."""
625
1081
if timeout is None:
626
1082
timeout = self.timeout
627
self.last_checked_ok = datetime.datetime.utcnow()
628
1083
if self.disable_initiator_tag is not None:
629
gobject.source_remove(self.disable_initiator_tag)
1084
GLib.source_remove(self.disable_initiator_tag)
1085
self.disable_initiator_tag = None
630
1086
if getattr(self, "enabled", False):
631
self.disable_initiator_tag = (gobject.timeout_add
632
(timedelta_to_milliseconds
633
(timeout), self.disable))
1087
self.disable_initiator_tag = GLib.timeout_add(
1088
int(timeout.total_seconds() * 1000), self.disable)
634
1089
self.expires = datetime.datetime.utcnow() + timeout
636
1091
def need_approval(self):
637
1092
self.last_approval_request = datetime.datetime.utcnow()
639
1094
def start_checker(self):
640
1095
"""Start a new checker subprocess if one is not running.
642
1097
If a checker already exists, leave it running and do
644
1099
# The reason for not killing a running checker is that if we
645
# did that, then if a checker (for some reason) started
646
# running slowly and taking more than 'interval' time, the
647
# client would inevitably timeout, since no checker would get
648
# a chance to run to completion. If we instead leave running
1100
# did that, and if a checker (for some reason) started running
1101
# slowly and taking more than 'interval' time, then the client
1102
# would inevitably timeout, since no checker would get a
1103
# chance to run to completion. If we instead leave running
649
1104
# checkers alone, the checker would have to take more time
650
1105
# than 'timeout' for the client to be disabled, which is as it
653
# If a checker exists, make sure it is not a zombie
655
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
656
except (AttributeError, OSError) as error:
657
if (isinstance(error, OSError)
658
and error.errno != errno.ECHILD):
662
logger.warning("Checker was a zombie")
663
gobject.source_remove(self.checker_callback_tag)
664
self.checker_callback(pid, status,
665
self.current_checker_command)
1108
if self.checker is not None and not self.checker.is_alive():
1109
logger.warning("Checker was not alive; joining")
666
1112
# Start a new checker if needed
667
1113
if self.checker is None:
1114
# Escape attributes for the shell
1116
attr: re.escape(str(getattr(self, attr)))
1117
for attr in self.runtime_expansions}
669
# In case checker_command has exactly one % operator
670
command = self.checker_command % self.host
672
# Escape attributes for the shell
673
escaped_attrs = dict(
675
re.escape(unicode(str(getattr(self, attr, "")),
679
self.runtime_expansions)
682
command = self.checker_command % escaped_attrs
683
except TypeError as error:
684
logger.error('Could not format string "%s":'
685
' %s', self.checker_command, error)
686
return True # Try again later
1119
command = self.checker_command % escaped_attrs
1120
except TypeError as error:
1121
logger.error('Could not format string "%s"',
1122
self.checker_command,
1124
return True # Try again later
687
1125
self.current_checker_command = command
689
logger.info("Starting checker %r for %s",
691
# We don't need to redirect stdout and stderr, since
692
# in normal mode, that is already done by daemon(),
693
# and in debug mode we don't want to. (Stdin is
694
# always replaced by /dev/null.)
695
self.checker = subprocess.Popen(command,
698
self.checker_callback_tag = (gobject.child_watch_add
700
self.checker_callback,
702
# The checker may have completed before the gobject
703
# watch was added. Check for this.
704
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
706
gobject.source_remove(self.checker_callback_tag)
707
self.checker_callback(pid, status, command)
708
except OSError as error:
709
logger.error("Failed to start subprocess: %s",
711
# Re-run this periodically if run by gobject.timeout_add
1126
logger.info("Starting checker %r for %s", command,
1128
# We don't need to redirect stdout and stderr, since
1129
# in normal mode, that is already done by daemon(),
1130
# and in debug mode we don't want to. (Stdin is
1131
# always replaced by /dev/null.)
1132
# The exception is when not debugging but nevertheless
1133
# running in the foreground; use the previously
1135
popen_args = {"close_fds": True,
1138
if (not self.server_settings["debug"]
1139
and self.server_settings["foreground"]):
1140
popen_args.update({"stdout": wnull,
1142
pipe = multiprocessing.Pipe(duplex=False)
1143
self.checker = multiprocessing.Process(
1145
args=(pipe[1], subprocess.call, command),
1147
self.checker.start()
1148
self.checker_callback_tag = GLib.io_add_watch(
1149
pipe[0].fileno(), GLib.IO_IN,
1150
self.checker_callback, pipe[0], command)
1151
# Re-run this periodically if run by GLib.timeout_add
714
1154
def stop_checker(self):
715
1155
"""Force the checker process, if any, to stop."""
716
1156
if self.checker_callback_tag:
717
gobject.source_remove(self.checker_callback_tag)
1157
GLib.source_remove(self.checker_callback_tag)
718
1158
self.checker_callback_tag = None
719
1159
if getattr(self, "checker", None) is None:
721
1161
logger.debug("Stopping checker for %(name)s", vars(self))
723
os.kill(self.checker.pid, signal.SIGTERM)
725
#if self.checker.poll() is None:
726
# os.kill(self.checker.pid, signal.SIGKILL)
727
except OSError as error:
728
if error.errno != errno.ESRCH: # No such process
1162
self.checker.terminate()
730
1163
self.checker = None
733
def dbus_service_property(dbus_interface, signature="v",
734
access="readwrite", byte_arrays=False):
1166
def dbus_service_property(dbus_interface,
735
1170
"""Decorators for marking methods of a DBusObjectWithProperties to
736
1171
become properties on the D-Bus.
738
1173
The decorated method will be called with no arguments by "Get"
739
1174
and with one argument by "Set".
741
1176
The parameters, where they are supported, are the same as
742
1177
dbus.service.method, except there is only "signature", since the
743
1178
type from Get() and the type sent to Set() is the same.
782
class DBusObjectWithProperties(dbus.service.Object):
1261
class DBusObjectWithAnnotations(dbus.service.Object):
1262
"""A D-Bus object with annotations.
1264
Classes inheriting from this can use the dbus_annotations
1265
decorator to add annotations to methods or signals.
1269
def _is_dbus_thing(thing):
1270
"""Returns a function testing if an attribute is a D-Bus thing
1272
If called like _is_dbus_thing("method") it returns a function
1273
suitable for use as predicate to inspect.getmembers().
1275
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1278
def _get_all_dbus_things(self, thing):
1279
"""Returns a generator of (name, attribute) pairs
1281
return ((getattr(athing.__get__(self), "_dbus_name", name),
1282
athing.__get__(self))
1283
for cls in self.__class__.__mro__
1285
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1287
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1289
path_keyword='object_path',
1290
connection_keyword='connection')
1291
def Introspect(self, object_path, connection):
1292
"""Overloading of standard D-Bus method.
1294
Inserts annotation tags on methods and signals.
1296
xmlstring = dbus.service.Object.Introspect(self, object_path,
1299
document = xml.dom.minidom.parseString(xmlstring)
1301
for if_tag in document.getElementsByTagName("interface"):
1302
# Add annotation tags
1303
for typ in ("method", "signal"):
1304
for tag in if_tag.getElementsByTagName(typ):
1306
for name, prop in (self.
1307
_get_all_dbus_things(typ)):
1308
if (name == tag.getAttribute("name")
1309
and prop._dbus_interface
1310
== if_tag.getAttribute("name")):
1311
annots.update(getattr(
1312
prop, "_dbus_annotations", {}))
1313
for name, value in annots.items():
1314
ann_tag = document.createElement(
1316
ann_tag.setAttribute("name", name)
1317
ann_tag.setAttribute("value", value)
1318
tag.appendChild(ann_tag)
1319
# Add interface annotation tags
1320
for annotation, value in dict(
1321
itertools.chain.from_iterable(
1322
annotations().items()
1323
for name, annotations
1324
in self._get_all_dbus_things("interface")
1325
if name == if_tag.getAttribute("name")
1327
ann_tag = document.createElement("annotation")
1328
ann_tag.setAttribute("name", annotation)
1329
ann_tag.setAttribute("value", value)
1330
if_tag.appendChild(ann_tag)
1331
# Fix argument name for the Introspect method itself
1332
if (if_tag.getAttribute("name")
1333
== dbus.INTROSPECTABLE_IFACE):
1334
for cn in if_tag.getElementsByTagName("method"):
1335
if cn.getAttribute("name") == "Introspect":
1336
for arg in cn.getElementsByTagName("arg"):
1337
if (arg.getAttribute("direction")
1339
arg.setAttribute("name",
1341
xmlstring = document.toxml("utf-8")
1343
except (AttributeError, xml.dom.DOMException,
1344
xml.parsers.expat.ExpatError) as error:
1345
logger.error("Failed to override Introspection method",
1350
class DBusObjectWithProperties(DBusObjectWithAnnotations):
783
1351
"""A D-Bus object with properties.
785
1353
Classes inheriting from this can use the dbus_service_property
786
1354
decorator to expose methods as D-Bus properties. It exposes the
787
1355
standard Get(), Set(), and GetAll() methods on the D-Bus.
791
def _is_dbus_property(obj):
792
return getattr(obj, "_dbus_is_property", False)
794
def _get_all_dbus_properties(self):
795
"""Returns a generator of (name, attribute) pairs
797
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
798
for cls in self.__class__.__mro__
800
inspect.getmembers(cls, self._is_dbus_property))
802
1358
def _get_dbus_property(self, interface_name, property_name):
803
1359
"""Returns a bound method if one exists which is a D-Bus
804
1360
property with the specified name and interface.
806
for cls in self.__class__.__mro__:
807
for name, value in (inspect.getmembers
808
(cls, self._is_dbus_property)):
1362
for cls in self.__class__.__mro__:
1363
for name, value in inspect.getmembers(
1364
cls, self._is_dbus_thing("property")):
809
1365
if (value._dbus_name == property_name
810
1366
and value._dbus_interface == interface_name):
811
1367
return value.__get__(self)
813
1369
# No such property
814
raise DBusPropertyNotFound(self.dbus_object_path + ":"
815
+ interface_name + "."
818
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1370
raise DBusPropertyNotFound("{}:{}.{}".format(
1371
self.dbus_object_path, interface_name, property_name))
1374
def _get_all_interface_names(cls):
1375
"""Get a sequence of all interfaces supported by an object"""
1376
return (name for name in set(getattr(getattr(x, attr),
1377
"_dbus_interface", None)
1378
for x in (inspect.getmro(cls))
1380
if name is not None)
1382
@dbus.service.method(dbus.PROPERTIES_IFACE,
819
1384
out_signature="v")
820
1385
def Get(self, interface_name, property_name):
821
1386
"""Standard D-Bus property Get() method, see D-Bus standard.
865
1433
if not hasattr(value, "variant_level"):
866
1434
properties[name] = value
868
properties[name] = type(value)(value, variant_level=
869
value.variant_level+1)
1436
properties[name] = type(value)(
1437
value, variant_level=value.variant_level + 1)
870
1438
return dbus.Dictionary(properties, signature="sv")
1440
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1441
def PropertiesChanged(self, interface_name, changed_properties,
1442
invalidated_properties):
1443
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
872
1448
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
873
1449
out_signature="s",
874
1450
path_keyword='object_path',
875
1451
connection_keyword='connection')
876
1452
def Introspect(self, object_path, connection):
877
"""Standard D-Bus method, overloaded to insert property tags.
1453
"""Overloading of standard D-Bus method.
1455
Inserts property tags and interface annotation tags.
879
xmlstring = dbus.service.Object.Introspect(self, object_path,
1457
xmlstring = DBusObjectWithAnnotations.Introspect(self,
882
1461
document = xml.dom.minidom.parseString(xmlstring)
883
1463
def make_tag(document, name, prop):
884
1464
e = document.createElement("property")
885
1465
e.setAttribute("name", name)
886
1466
e.setAttribute("type", prop._dbus_signature)
887
1467
e.setAttribute("access", prop._dbus_access)
889
1470
for if_tag in document.getElementsByTagName("interface"):
890
1472
for tag in (make_tag(document, name, prop)
892
in self._get_all_dbus_properties()
1474
in self._get_all_dbus_things("property")
893
1475
if prop._dbus_interface
894
1476
== if_tag.getAttribute("name")):
895
1477
if_tag.appendChild(tag)
1478
# Add annotation tags for properties
1479
for tag in if_tag.getElementsByTagName("property"):
1481
for name, prop in self._get_all_dbus_things(
1483
if (name == tag.getAttribute("name")
1484
and prop._dbus_interface
1485
== if_tag.getAttribute("name")):
1486
annots.update(getattr(
1487
prop, "_dbus_annotations", {}))
1488
for name, value in annots.items():
1489
ann_tag = document.createElement(
1491
ann_tag.setAttribute("name", name)
1492
ann_tag.setAttribute("value", value)
1493
tag.appendChild(ann_tag)
896
1494
# Add the names to the return values for the
897
1495
# "org.freedesktop.DBus.Properties" methods
898
1496
if (if_tag.getAttribute("name")
913
1511
except (AttributeError, xml.dom.DOMException,
914
1512
xml.parsers.expat.ExpatError) as error:
915
1513
logger.error("Failed to override Introspection method",
920
def datetime_to_dbus (dt, variant_level=0):
1519
dbus.OBJECT_MANAGER_IFACE
1520
except AttributeError:
1521
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1524
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1525
"""A D-Bus object with an ObjectManager.
1527
Classes inheriting from this exposes the standard
1528
GetManagedObjects call and the InterfacesAdded and
1529
InterfacesRemoved signals on the standard
1530
"org.freedesktop.DBus.ObjectManager" interface.
1532
Note: No signals are sent automatically; they must be sent
1535
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1536
out_signature="a{oa{sa{sv}}}")
1537
def GetManagedObjects(self):
1538
"""This function must be overridden"""
1539
raise NotImplementedError()
1541
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1542
signature="oa{sa{sv}}")
1543
def InterfacesAdded(self, object_path, interfaces_and_properties):
1546
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1547
def InterfacesRemoved(self, object_path, interfaces):
1550
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1552
path_keyword='object_path',
1553
connection_keyword='connection')
1554
def Introspect(self, object_path, connection):
1555
"""Overloading of standard D-Bus method.
1557
Override return argument name of GetManagedObjects to be
1558
"objpath_interfaces_and_properties"
1560
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1564
document = xml.dom.minidom.parseString(xmlstring)
1566
for if_tag in document.getElementsByTagName("interface"):
1567
# Fix argument name for the GetManagedObjects method
1568
if (if_tag.getAttribute("name")
1569
== dbus.OBJECT_MANAGER_IFACE):
1570
for cn in if_tag.getElementsByTagName("method"):
1571
if (cn.getAttribute("name")
1572
== "GetManagedObjects"):
1573
for arg in cn.getElementsByTagName("arg"):
1574
if (arg.getAttribute("direction")
1578
"objpath_interfaces"
1580
xmlstring = document.toxml("utf-8")
1582
except (AttributeError, xml.dom.DOMException,
1583
xml.parsers.expat.ExpatError) as error:
1584
logger.error("Failed to override Introspection method",
1589
def datetime_to_dbus(dt, variant_level=0):
921
1590
"""Convert a UTC datetime.datetime() to a D-Bus type."""
923
return dbus.String("", variant_level = variant_level)
924
return dbus.String(dt.isoformat(),
925
variant_level=variant_level)
928
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
930
"""Applied to an empty subclass of a D-Bus object, this metaclass
931
will add additional D-Bus attributes matching a certain pattern.
1592
return dbus.String("", variant_level=variant_level)
1593
return dbus.String(dt.isoformat(), variant_level=variant_level)
1596
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1597
"""A class decorator; applied to a subclass of
1598
dbus.service.Object, it will add alternate D-Bus attributes with
1599
interface names according to the "alt_interface_names" mapping.
1602
@alternate_dbus_interfaces({"org.example.Interface":
1603
"net.example.AlternateInterface"})
1604
class SampleDBusObject(dbus.service.Object):
1605
@dbus.service.method("org.example.Interface")
1606
def SampleDBusMethod():
1609
The above "SampleDBusMethod" on "SampleDBusObject" will be
1610
reachable via two interfaces: "org.example.Interface" and
1611
"net.example.AlternateInterface", the latter of which will have
1612
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1613
"true", unless "deprecate" is passed with a False value.
1615
This works for methods and signals, and also for D-Bus properties
1616
(from DBusObjectWithProperties) and interfaces (from the
1617
dbus_interface_annotations decorator).
933
def __new__(mcs, name, bases, attr):
934
# Go through all the base classes which could have D-Bus
935
# methods, signals, or properties in them
936
for base in (b for b in bases
937
if issubclass(b, dbus.service.Object)):
938
# Go though all attributes of the base class
939
for attrname, attribute in inspect.getmembers(base):
1621
for orig_interface_name, alt_interface_name in (
1622
alt_interface_names.items()):
1624
interface_names = set()
1625
# Go though all attributes of the class
1626
for attrname, attribute in inspect.getmembers(cls):
940
1627
# Ignore non-D-Bus attributes, and D-Bus attributes
941
1628
# with the wrong interface name
942
1629
if (not hasattr(attribute, "_dbus_interface")
943
or not attribute._dbus_interface
944
.startswith("se.recompile.Mandos")):
1630
or not attribute._dbus_interface.startswith(
1631
orig_interface_name)):
946
1633
# Create an alternate D-Bus interface name based on
947
1634
# the current name
948
alt_interface = (attribute._dbus_interface
949
.replace("se.recompile.Mandos",
950
"se.bsnet.fukt.Mandos"))
1635
alt_interface = attribute._dbus_interface.replace(
1636
orig_interface_name, alt_interface_name)
1637
interface_names.add(alt_interface)
951
1638
# Is this a D-Bus signal?
952
1639
if getattr(attribute, "_dbus_is_signal", False):
953
# Extract the original non-method function by
955
nonmethod_func = (dict(
1640
# Extract the original non-method undecorated
1641
# function by black magic
1642
if sys.version_info.major == 2:
1643
nonmethod_func = (dict(
956
1644
zip(attribute.func_code.co_freevars,
957
attribute.__closure__))["func"]
1645
attribute.__closure__))
1646
["func"].cell_contents)
1648
nonmethod_func = (dict(
1649
zip(attribute.__code__.co_freevars,
1650
attribute.__closure__))
1651
["func"].cell_contents)
959
1652
# Create a new, but exactly alike, function
960
1653
# object, and decorate it to be a new D-Bus signal
961
1654
# with the alternate D-Bus interface name
962
new_function = (dbus.service.signal
964
attribute._dbus_signature)
966
nonmethod_func.func_code,
967
nonmethod_func.func_globals,
968
nonmethod_func.func_name,
969
nonmethod_func.func_defaults,
970
nonmethod_func.func_closure)))
1655
new_function = copy_function(nonmethod_func)
1656
new_function = (dbus.service.signal(
1658
attribute._dbus_signature)(new_function))
1659
# Copy annotations, if any
1661
new_function._dbus_annotations = dict(
1662
attribute._dbus_annotations)
1663
except AttributeError:
971
1666
# Define a creator of a function to call both the
972
# old and new functions, so both the old and new
973
# signals gets sent when the function is called
1667
# original and alternate functions, so both the
1668
# original and alternate signals gets sent when
1669
# the function is called
974
1670
def fixscope(func1, func2):
975
1671
"""This function is a scope container to pass
976
1672
func1 and func2 to the "call_both" function
977
1673
outside of its arguments"""
1675
@functools.wraps(func2)
978
1676
def call_both(*args, **kwargs):
979
1677
"""This function will emit two D-Bus
980
1678
signals by calling func1 and func2"""
981
1679
func1(*args, **kwargs)
982
1680
func2(*args, **kwargs)
1681
# Make wrapper function look like a D-Bus
1683
for name, attr in inspect.getmembers(func2):
1684
if name.startswith("_dbus_"):
1685
setattr(call_both, name, attr)
983
1687
return call_both
984
1688
# Create the "call_both" function and add it to
986
attr[attrname] = fixscope(attribute,
1690
attr[attrname] = fixscope(attribute, new_function)
988
1691
# Is this a D-Bus method?
989
1692
elif getattr(attribute, "_dbus_is_method", False):
990
1693
# Create a new, but exactly alike, function
991
1694
# object. Decorate it to be a new D-Bus method
992
1695
# with the alternate D-Bus interface name. Add it
994
attr[attrname] = (dbus.service.method
996
attribute._dbus_in_signature,
997
attribute._dbus_out_signature)
999
(attribute.func_code,
1000
attribute.func_globals,
1001
attribute.func_name,
1002
attribute.func_defaults,
1003
attribute.func_closure)))
1698
dbus.service.method(
1700
attribute._dbus_in_signature,
1701
attribute._dbus_out_signature)
1702
(copy_function(attribute)))
1703
# Copy annotations, if any
1705
attr[attrname]._dbus_annotations = dict(
1706
attribute._dbus_annotations)
1707
except AttributeError:
1004
1709
# Is this a D-Bus property?
1005
1710
elif getattr(attribute, "_dbus_is_property", False):
1006
1711
# Create a new, but exactly alike, function
1007
1712
# object, and decorate it to be a new D-Bus
1008
1713
# property with the alternate D-Bus interface
1009
1714
# name. Add it to the class.
1010
attr[attrname] = (dbus_service_property
1012
attribute._dbus_signature,
1013
attribute._dbus_access,
1015
._dbus_get_args_options
1018
(attribute.func_code,
1019
attribute.func_globals,
1020
attribute.func_name,
1021
attribute.func_defaults,
1022
attribute.func_closure)))
1023
return type.__new__(mcs, name, bases, attr)
1715
attr[attrname] = (dbus_service_property(
1716
alt_interface, attribute._dbus_signature,
1717
attribute._dbus_access,
1718
attribute._dbus_get_args_options
1720
(copy_function(attribute)))
1721
# Copy annotations, if any
1723
attr[attrname]._dbus_annotations = dict(
1724
attribute._dbus_annotations)
1725
except AttributeError:
1727
# Is this a D-Bus interface?
1728
elif getattr(attribute, "_dbus_is_interface", False):
1729
# Create a new, but exactly alike, function
1730
# object. Decorate it to be a new D-Bus interface
1731
# with the alternate D-Bus interface name. Add it
1734
dbus_interface_annotations(alt_interface)
1735
(copy_function(attribute)))
1737
# Deprecate all alternate interfaces
1738
iname = "_AlternateDBusNames_interface_annotation{}"
1739
for interface_name in interface_names:
1741
@dbus_interface_annotations(interface_name)
1743
return {"org.freedesktop.DBus.Deprecated":
1745
# Find an unused name
1746
for aname in (iname.format(i)
1747
for i in itertools.count()):
1748
if aname not in attr:
1752
# Replace the class with a new subclass of it with
1753
# methods, signals, etc. as created above.
1754
if sys.version_info.major == 2:
1755
cls = type(b"{}Alternate".format(cls.__name__),
1758
cls = type("{}Alternate".format(cls.__name__),
1765
@alternate_dbus_interfaces({"se.recompile.Mandos":
1766
"se.bsnet.fukt.Mandos"})
1026
1767
class ClientDBus(Client, DBusObjectWithProperties):
1027
1768
"""A Client class using D-Bus
1030
1771
dbus_object_path: dbus.ObjectPath
1031
1772
bus: dbus.SystemBus()
1034
1775
runtime_expansions = (Client.runtime_expansions
1035
+ ("dbus_object_path",))
1776
+ ("dbus_object_path", ))
1778
_interface = "se.recompile.Mandos.Client"
1037
1780
# dbus.service.Object doesn't use super(), so we can't either.
1039
def __init__(self, bus = None, *args, **kwargs):
1782
def __init__(self, bus=None, *args, **kwargs):
1041
1784
Client.__init__(self, *args, **kwargs)
1042
self._approvals_pending = 0
1044
self._approvals_pending = 0
1045
1785
# Only now, when this client is initialized, can it show up on
1047
client_object_name = unicode(self.name).translate(
1787
client_object_name = str(self.name).translate(
1048
1788
{ord("."): ord("_"),
1049
1789
ord("-"): ord("_")})
1050
self.dbus_object_path = (dbus.ObjectPath
1051
("/clients/" + client_object_name))
1790
self.dbus_object_path = dbus.ObjectPath(
1791
"/clients/" + client_object_name)
1052
1792
DBusObjectWithProperties.__init__(self, self.bus,
1053
1793
self.dbus_object_path)
1055
def notifychangeproperty(transform_func,
1056
dbus_name, type_func=lambda x: x,
1795
def notifychangeproperty(transform_func, dbus_name,
1796
type_func=lambda x: x,
1798
invalidate_only=False,
1799
_interface=_interface):
1058
1800
""" Modify a variable so that it's a property which announces
1059
1801
its changes to DBus.
1061
1803
transform_fun: Function that takes a value and a variant_level
1062
1804
and transforms it to a D-Bus type.
1063
1805
dbus_name: D-Bus name of the variable
1065
1807
to the D-Bus. Default: no transform
1066
1808
variant_level: D-Bus variant level. Default: 1
1068
attrname = "_{0}".format(dbus_name)
1810
attrname = "_{}".format(dbus_name)
1069
1812
def setter(self, value):
1070
1813
if hasattr(self, "dbus_object_path"):
1071
1814
if (not hasattr(self, attrname) or
1072
1815
type_func(getattr(self, attrname, None))
1073
1816
!= type_func(value)):
1074
dbus_value = transform_func(type_func(value),
1077
self.PropertyChanged(dbus.String(dbus_name),
1818
self.PropertiesChanged(
1819
_interface, dbus.Dictionary(),
1820
dbus.Array((dbus_name, )))
1822
dbus_value = transform_func(
1824
variant_level=variant_level)
1825
self.PropertyChanged(dbus.String(dbus_name),
1827
self.PropertiesChanged(
1829
dbus.Dictionary({dbus.String(dbus_name):
1079
1832
setattr(self, attrname, value)
1081
1834
return property(lambda self: getattr(self, attrname), setter)
1084
1836
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1085
1837
approvals_pending = notifychangeproperty(dbus.Boolean,
1086
1838
"ApprovalPending",
1088
1840
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1089
1841
last_enabled = notifychangeproperty(datetime_to_dbus,
1091
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1092
type_func = lambda checker:
1093
checker is not None)
1843
checker = notifychangeproperty(
1844
dbus.Boolean, "CheckerRunning",
1845
type_func=lambda checker: checker is not None)
1094
1846
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1095
1847
"LastCheckedOK")
1848
last_checker_status = notifychangeproperty(dbus.Int16,
1849
"LastCheckerStatus")
1096
1850
last_approval_request = notifychangeproperty(
1097
1851
datetime_to_dbus, "LastApprovalRequest")
1098
1852
approved_by_default = notifychangeproperty(dbus.Boolean,
1099
1853
"ApprovedByDefault")
1100
approval_delay = notifychangeproperty(dbus.UInt64,
1103
timedelta_to_milliseconds)
1854
approval_delay = notifychangeproperty(
1855
dbus.UInt64, "ApprovalDelay",
1856
type_func=lambda td: td.total_seconds() * 1000)
1104
1857
approval_duration = notifychangeproperty(
1105
1858
dbus.UInt64, "ApprovalDuration",
1106
type_func = timedelta_to_milliseconds)
1859
type_func=lambda td: td.total_seconds() * 1000)
1107
1860
host = notifychangeproperty(dbus.String, "Host")
1108
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1110
timedelta_to_milliseconds)
1861
timeout = notifychangeproperty(
1862
dbus.UInt64, "Timeout",
1863
type_func=lambda td: td.total_seconds() * 1000)
1111
1864
extended_timeout = notifychangeproperty(
1112
1865
dbus.UInt64, "ExtendedTimeout",
1113
type_func = timedelta_to_milliseconds)
1114
interval = notifychangeproperty(dbus.UInt64,
1117
timedelta_to_milliseconds)
1866
type_func=lambda td: td.total_seconds() * 1000)
1867
interval = notifychangeproperty(
1868
dbus.UInt64, "Interval",
1869
type_func=lambda td: td.total_seconds() * 1000)
1118
1870
checker_command = notifychangeproperty(dbus.String, "Checker")
1871
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1872
invalidate_only=True)
1120
1874
del notifychangeproperty
1122
1876
def __del__(self, *args, **kwargs):
1124
1878
self.remove_from_connection()
1204
1957
server to mandos-client
1208
1961
# Rejected - signal
1209
1962
@dbus.service.signal(_interface, signature="s")
1210
1963
def Rejected(self, reason):
1214
1967
# NeedApproval - signal
1215
1968
@dbus.service.signal(_interface, signature="tb")
1216
1969
def NeedApproval(self, timeout, default):
1218
1971
return self.need_approval()
1220
# NeRwequest - signal
1221
@dbus.service.signal(_interface, signature="s")
1222
def NewRequest(self, ip):
1224
Is sent after a client request a password.
1230
1975
# Approve - method
1231
1976
@dbus.service.method(_interface, in_signature="b")
1232
1977
def Approve(self, value):
1233
1978
self.approve(value)
1235
1980
# CheckedOK - method
1236
1981
@dbus.service.method(_interface)
1237
1982
def CheckedOK(self):
1238
1983
self.checked_ok()
1240
1985
# Enable - method
1986
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1241
1987
@dbus.service.method(_interface)
1242
1988
def Enable(self):
1246
1992
# StartChecker - method
1993
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1247
1994
@dbus.service.method(_interface)
1248
1995
def StartChecker(self):
1250
1997
self.start_checker()
1252
1999
# Disable - method
2000
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1253
2001
@dbus.service.method(_interface)
1254
2002
def Disable(self):
1258
2006
# StopChecker - method
2007
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1259
2008
@dbus.service.method(_interface)
1260
2009
def StopChecker(self):
1261
2010
self.stop_checker()
1265
2014
# ApprovalPending - property
1266
2015
@dbus_service_property(_interface, signature="b", access="read")
1267
2016
def ApprovalPending_dbus_property(self):
1268
2017
return dbus.Boolean(bool(self.approvals_pending))
1270
2019
# ApprovedByDefault - property
1271
@dbus_service_property(_interface, signature="b",
2020
@dbus_service_property(_interface,
1272
2022
access="readwrite")
1273
2023
def ApprovedByDefault_dbus_property(self, value=None):
1274
2024
if value is None: # get
1275
2025
return dbus.Boolean(self.approved_by_default)
1276
2026
self.approved_by_default = bool(value)
1278
2028
# ApprovalDelay - property
1279
@dbus_service_property(_interface, signature="t",
2029
@dbus_service_property(_interface,
1280
2031
access="readwrite")
1281
2032
def ApprovalDelay_dbus_property(self, value=None):
1282
2033
if value is None: # get
1283
return dbus.UInt64(self.approval_delay_milliseconds())
2034
return dbus.UInt64(self.approval_delay.total_seconds()
1284
2036
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1286
2038
# ApprovalDuration - property
1287
@dbus_service_property(_interface, signature="t",
2039
@dbus_service_property(_interface,
1288
2041
access="readwrite")
1289
2042
def ApprovalDuration_dbus_property(self, value=None):
1290
2043
if value is None: # get
1291
return dbus.UInt64(timedelta_to_milliseconds(
1292
self.approval_duration))
2044
return dbus.UInt64(self.approval_duration.total_seconds()
1293
2046
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1295
2048
# Name - property
2050
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1296
2051
@dbus_service_property(_interface, signature="s", access="read")
1297
2052
def Name_dbus_property(self):
1298
2053
return dbus.String(self.name)
2057
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2058
@dbus_service_property(_interface, signature="s", access="read")
2059
def KeyID_dbus_property(self):
2060
return dbus.String(self.key_id)
1300
2062
# Fingerprint - property
2064
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1301
2065
@dbus_service_property(_interface, signature="s", access="read")
1302
2066
def Fingerprint_dbus_property(self):
1303
2067
return dbus.String(self.fingerprint)
1305
2069
# Host - property
1306
@dbus_service_property(_interface, signature="s",
2070
@dbus_service_property(_interface,
1307
2072
access="readwrite")
1308
2073
def Host_dbus_property(self, value=None):
1309
2074
if value is None: # get
1310
2075
return dbus.String(self.host)
1311
self.host = unicode(value)
2076
self.host = str(value)
1313
2078
# Created - property
2080
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1314
2081
@dbus_service_property(_interface, signature="s", access="read")
1315
2082
def Created_dbus_property(self):
1316
2083
return datetime_to_dbus(self.created)
1318
2085
# LastEnabled - property
1319
2086
@dbus_service_property(_interface, signature="s", access="read")
1320
2087
def LastEnabled_dbus_property(self):
1321
2088
return datetime_to_dbus(self.last_enabled)
1323
2090
# Enabled - property
1324
@dbus_service_property(_interface, signature="b",
2091
@dbus_service_property(_interface,
1325
2093
access="readwrite")
1326
2094
def Enabled_dbus_property(self, value=None):
1327
2095
if value is None: # get
1334
2102
# LastCheckedOK - property
1335
@dbus_service_property(_interface, signature="s",
2103
@dbus_service_property(_interface,
1336
2105
access="readwrite")
1337
2106
def LastCheckedOK_dbus_property(self, value=None):
1338
2107
if value is not None:
1339
2108
self.checked_ok()
1341
2110
return datetime_to_dbus(self.last_checked_ok)
2112
# LastCheckerStatus - property
2113
@dbus_service_property(_interface, signature="n", access="read")
2114
def LastCheckerStatus_dbus_property(self):
2115
return dbus.Int16(self.last_checker_status)
1343
2117
# Expires - property
1344
2118
@dbus_service_property(_interface, signature="s", access="read")
1345
2119
def Expires_dbus_property(self):
1346
2120
return datetime_to_dbus(self.expires)
1348
2122
# LastApprovalRequest - property
1349
2123
@dbus_service_property(_interface, signature="s", access="read")
1350
2124
def LastApprovalRequest_dbus_property(self):
1351
2125
return datetime_to_dbus(self.last_approval_request)
1353
2127
# Timeout - property
1354
@dbus_service_property(_interface, signature="t",
2128
@dbus_service_property(_interface,
1355
2130
access="readwrite")
1356
2131
def Timeout_dbus_property(self, value=None):
1357
2132
if value is None: # get
1358
return dbus.UInt64(self.timeout_milliseconds())
2133
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2134
old_timeout = self.timeout
1359
2135
self.timeout = datetime.timedelta(0, 0, 0, value)
1360
if getattr(self, "disable_initiator_tag", None) is None:
1362
# Reschedule timeout
1363
gobject.source_remove(self.disable_initiator_tag)
1364
self.disable_initiator_tag = None
1366
time_to_die = timedelta_to_milliseconds((self
1371
if time_to_die <= 0:
1372
# The timeout has passed
1375
self.expires = (datetime.datetime.utcnow()
1376
+ datetime.timedelta(milliseconds =
1378
self.disable_initiator_tag = (gobject.timeout_add
1379
(time_to_die, self.disable))
2136
# Reschedule disabling
2138
now = datetime.datetime.utcnow()
2139
self.expires += self.timeout - old_timeout
2140
if self.expires <= now:
2141
# The timeout has passed
2144
if (getattr(self, "disable_initiator_tag", None)
2147
GLib.source_remove(self.disable_initiator_tag)
2148
self.disable_initiator_tag = GLib.timeout_add(
2149
int((self.expires - now).total_seconds() * 1000),
1381
2152
# ExtendedTimeout - property
1382
@dbus_service_property(_interface, signature="t",
2153
@dbus_service_property(_interface,
1383
2155
access="readwrite")
1384
2156
def ExtendedTimeout_dbus_property(self, value=None):
1385
2157
if value is None: # get
1386
return dbus.UInt64(self.extended_timeout_milliseconds())
2158
return dbus.UInt64(self.extended_timeout.total_seconds()
1387
2160
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1389
2162
# Interval - property
1390
@dbus_service_property(_interface, signature="t",
2163
@dbus_service_property(_interface,
1391
2165
access="readwrite")
1392
2166
def Interval_dbus_property(self, value=None):
1393
2167
if value is None: # get
1394
return dbus.UInt64(self.interval_milliseconds())
2168
return dbus.UInt64(self.interval.total_seconds() * 1000)
1395
2169
self.interval = datetime.timedelta(0, 0, 0, value)
1396
2170
if getattr(self, "checker_initiator_tag", None) is None:
1398
2172
if self.enabled:
1399
2173
# Reschedule checker run
1400
gobject.source_remove(self.checker_initiator_tag)
1401
self.checker_initiator_tag = (gobject.timeout_add
1402
(value, self.start_checker))
1403
self.start_checker() # Start one now, too
2174
GLib.source_remove(self.checker_initiator_tag)
2175
self.checker_initiator_tag = GLib.timeout_add(
2176
value, self.start_checker)
2177
self.start_checker() # Start one now, too
1405
2179
# Checker - property
1406
@dbus_service_property(_interface, signature="s",
2180
@dbus_service_property(_interface,
1407
2182
access="readwrite")
1408
2183
def Checker_dbus_property(self, value=None):
1409
2184
if value is None: # get
1410
2185
return dbus.String(self.checker_command)
1411
self.checker_command = unicode(value)
2186
self.checker_command = str(value)
1413
2188
# CheckerRunning - property
1414
@dbus_service_property(_interface, signature="b",
2189
@dbus_service_property(_interface,
1415
2191
access="readwrite")
1416
2192
def CheckerRunning_dbus_property(self, value=None):
1417
2193
if value is None: # get
1450
2234
if data[0] == 'data':
1452
2236
if data[0] == 'function':
1453
2238
def func(*args, **kwargs):
1454
2239
self._pipe.send(('funcall', name, args, kwargs))
1455
2240
return self._pipe.recv()[1]
1458
2244
def __setattr__(self, name, value):
1459
2245
if name == '_pipe':
1460
2246
return super(ProxyClient, self).__setattr__(name, value)
1461
2247
self._pipe.send(('setattr', name, value))
1464
class ClientDBusTransitional(ClientDBus):
1465
__metaclass__ = AlternateDBusNamesMetaclass
1468
2250
class ClientHandler(socketserver.BaseRequestHandler, object):
1469
2251
"""A class to handle client connections.
1471
2253
Instantiated once for each connection to handle it.
1472
2254
Note: This will run in its own forked process."""
1474
2256
def handle(self):
1475
2257
with contextlib.closing(self.server.child_pipe) as child_pipe:
1476
2258
logger.info("TCP connection from: %s",
1477
unicode(self.client_address))
2259
str(self.client_address))
1478
2260
logger.debug("Pipe FD: %d",
1479
2261
self.server.child_pipe.fileno())
1481
session = (gnutls.connection
1482
.ClientSession(self.request,
1484
.X509Credentials()))
1486
# Note: gnutls.connection.X509Credentials is really a
1487
# generic GnuTLS certificate credentials object so long as
1488
# no X.509 keys are added to it. Therefore, we can use it
1489
# here despite using OpenPGP certificates.
1491
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1492
# "+AES-256-CBC", "+SHA1",
1493
# "+COMP-NULL", "+CTYPE-OPENPGP",
2263
session = gnutls.ClientSession(self.request)
2265
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2266
# "+AES-256-CBC", "+SHA1",
2267
# "+COMP-NULL", "+CTYPE-OPENPGP",
1495
2269
# Use a fallback default, since this MUST be set.
1496
2270
priority = self.server.gnutls_priority
1497
2271
if priority is None:
1498
2272
priority = "NORMAL"
1499
(gnutls.library.functions
1500
.gnutls_priority_set_direct(session._c_object,
2273
gnutls.priority_set_direct(session._c_object,
2274
priority.encode("utf-8"),
1503
2277
# Start communication using the Mandos protocol
1504
2278
# Get protocol number
1505
2279
line = self.request.makefile().readline()
1506
2280
logger.debug("Protocol version: %r", line)
1508
2282
if int(line.strip().split()[0]) > 1:
2283
raise RuntimeError(line)
1510
2284
except (ValueError, IndexError, RuntimeError) as error:
1511
2285
logger.error("Unknown protocol version: %s", error)
1514
2288
# Start GnuTLS connection
1516
2290
session.handshake()
1517
except gnutls.errors.GNUTLSError as error:
2291
except gnutls.Error as error:
1518
2292
logger.warning("Handshake failed: %s", error)
1519
2293
# Do not run session.bye() here: the session is not
1520
2294
# established. Just abandon the request.
1522
2296
logger.debug("Handshake succeeded")
1524
2298
approval_required = False
1527
fpr = self.fingerprint(self.peer_certificate
1530
gnutls.errors.GNUTLSError) as error:
1531
logger.warning("Bad certificate: %s", error)
1533
logger.debug("Fingerprint: %s", fpr)
1536
client = ProxyClient(child_pipe, fpr,
2300
if gnutls.has_rawpk:
2303
key_id = self.key_id(
2304
self.peer_certificate(session))
2305
except (TypeError, gnutls.Error) as error:
2306
logger.warning("Bad certificate: %s", error)
2308
logger.debug("Key ID: %s", key_id)
2313
fpr = self.fingerprint(
2314
self.peer_certificate(session))
2315
except (TypeError, gnutls.Error) as error:
2316
logger.warning("Bad certificate: %s", error)
2318
logger.debug("Fingerprint: %s", fpr)
2321
client = ProxyClient(child_pipe, key_id, fpr,
1537
2322
self.client_address)
1538
2323
except KeyError:
1541
if self.server.use_dbus:
1543
client.NewRequest(str(self.client_address))
1545
2326
if client.approval_delay:
1546
2327
delay = client.approval_delay
1547
2328
client.approvals_pending += 1
1548
2329
approval_required = True
1551
2332
if not client.enabled:
1552
2333
logger.info("Client %s is disabled",
1554
2335
if self.server.use_dbus:
1555
2336
# Emit D-Bus signal
1556
2337
client.Rejected("Disabled")
1559
2340
if client.approved or not client.approval_delay:
1560
#We are approved or approval is disabled
2341
# We are approved or approval is disabled
1562
2343
elif client.approved is None:
1563
2344
logger.info("Client %s needs approval",
1598
2377
delay -= time2 - time
1601
while sent_size < len(client.secret):
1603
sent = session.send(client.secret[sent_size:])
1604
except gnutls.errors.GNUTLSError as error:
1605
logger.warning("gnutls send failed")
1607
logger.debug("Sent: %d, remaining: %d",
1608
sent, len(client.secret)
1609
- (sent_size + sent))
2380
session.send(client.secret)
2381
except gnutls.Error as error:
2382
logger.warning("gnutls send failed",
1612
2386
logger.info("Sending secret to %s", client.name)
1613
2387
# bump the timeout using extended_timeout
1614
client.checked_ok(client.extended_timeout)
2388
client.bump_timeout(client.extended_timeout)
1615
2389
if self.server.use_dbus:
1616
2390
# Emit D-Bus signal
1617
2391
client.GotSecret()
1620
2394
if approval_required:
1621
2395
client.approvals_pending -= 1
1624
except gnutls.errors.GNUTLSError as error:
1625
logger.warning("GnuTLS bye failed")
2398
except gnutls.Error as error:
2399
logger.warning("GnuTLS bye failed",
1628
2403
def peer_certificate(session):
1629
"Return the peer's OpenPGP certificate as a bytestring"
1630
# If not an OpenPGP certificate...
1631
if (gnutls.library.functions
1632
.gnutls_certificate_type_get(session._c_object)
1633
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1634
# ...do the normal thing
1635
return session.peer_certificate
2404
"Return the peer's certificate as a bytestring"
2406
cert_type = gnutls.certificate_type_get2(session._c_object,
2408
except AttributeError:
2409
cert_type = gnutls.certificate_type_get(session._c_object)
2410
if gnutls.has_rawpk:
2411
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2413
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2414
# If not a valid certificate type...
2415
if cert_type not in valid_cert_types:
2416
logger.info("Cert type %r not in %r", cert_type,
2418
# ...return invalid data
1636
2420
list_size = ctypes.c_uint(1)
1637
cert_list = (gnutls.library.functions
1638
.gnutls_certificate_get_peers
2421
cert_list = (gnutls.certificate_get_peers
1639
2422
(session._c_object, ctypes.byref(list_size)))
1640
2423
if not bool(cert_list) and list_size.value != 0:
1641
raise gnutls.errors.GNUTLSError("error getting peer"
2424
raise gnutls.Error("error getting peer certificate")
1643
2425
if list_size.value == 0:
1645
2427
cert = cert_list[0]
1646
2428
return ctypes.string_at(cert.data, cert.size)
2431
def key_id(certificate):
2432
"Convert a certificate bytestring to a hexdigit key ID"
2433
# New GnuTLS "datum" with the public key
2434
datum = gnutls.datum_t(
2435
ctypes.cast(ctypes.c_char_p(certificate),
2436
ctypes.POINTER(ctypes.c_ubyte)),
2437
ctypes.c_uint(len(certificate)))
2438
# XXX all these need to be created in the gnutls "module"
2439
# New empty GnuTLS certificate
2440
pubkey = gnutls.pubkey_t()
2441
gnutls.pubkey_init(ctypes.byref(pubkey))
2442
# Import the raw public key into the certificate
2443
gnutls.pubkey_import(pubkey,
2444
ctypes.byref(datum),
2445
gnutls.X509_FMT_DER)
2446
# New buffer for the key ID
2447
buf = ctypes.create_string_buffer(32)
2448
buf_len = ctypes.c_size_t(len(buf))
2449
# Get the key ID from the raw public key into the buffer
2450
gnutls.pubkey_get_key_id(pubkey,
2451
gnutls.KEYID_USE_SHA256,
2452
ctypes.cast(ctypes.byref(buf),
2453
ctypes.POINTER(ctypes.c_ubyte)),
2454
ctypes.byref(buf_len))
2455
# Deinit the certificate
2456
gnutls.pubkey_deinit(pubkey)
2458
# Convert the buffer to a Python bytestring
2459
key_id = ctypes.string_at(buf, buf_len.value)
2460
# Convert the bytestring to hexadecimal notation
2461
hex_key_id = binascii.hexlify(key_id).upper()
1649
2465
def fingerprint(openpgp):
1650
2466
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1651
2467
# New GnuTLS "datum" with the OpenPGP public key
1652
datum = (gnutls.library.types
1653
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1656
ctypes.c_uint(len(openpgp))))
2468
datum = gnutls.datum_t(
2469
ctypes.cast(ctypes.c_char_p(openpgp),
2470
ctypes.POINTER(ctypes.c_ubyte)),
2471
ctypes.c_uint(len(openpgp)))
1657
2472
# New empty GnuTLS certificate
1658
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1659
(gnutls.library.functions
1660
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2473
crt = gnutls.openpgp_crt_t()
2474
gnutls.openpgp_crt_init(ctypes.byref(crt))
1661
2475
# Import the OpenPGP public key into the certificate
1662
(gnutls.library.functions
1663
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1664
gnutls.library.constants
1665
.GNUTLS_OPENPGP_FMT_RAW))
2476
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2477
gnutls.OPENPGP_FMT_RAW)
1666
2478
# Verify the self signature in the key
1667
2479
crtverify = ctypes.c_uint()
1668
(gnutls.library.functions
1669
.gnutls_openpgp_crt_verify_self(crt, 0,
1670
ctypes.byref(crtverify)))
2480
gnutls.openpgp_crt_verify_self(crt, 0,
2481
ctypes.byref(crtverify))
1671
2482
if crtverify.value != 0:
1672
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1673
raise (gnutls.errors.CertificateSecurityError
2483
gnutls.openpgp_crt_deinit(crt)
2484
raise gnutls.CertificateSecurityError(code
1675
2486
# New buffer for the fingerprint
1676
2487
buf = ctypes.create_string_buffer(20)
1677
2488
buf_len = ctypes.c_size_t()
1678
2489
# Get the fingerprint from the certificate into the buffer
1679
(gnutls.library.functions
1680
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1681
ctypes.byref(buf_len)))
2490
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2491
ctypes.byref(buf_len))
1682
2492
# Deinit the certificate
1683
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2493
gnutls.openpgp_crt_deinit(crt)
1684
2494
# Convert the buffer to a Python bytestring
1685
2495
fpr = ctypes.string_at(buf, buf_len.value)
1686
2496
# Convert the bytestring to hexadecimal notation
1691
2501
class MultiprocessingMixIn(object):
1692
2502
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1693
2504
def sub_process_main(self, request, address):
1695
2506
self.finish_request(request, address)
1696
2507
except Exception:
1697
2508
self.handle_error(request, address)
1698
2509
self.close_request(request)
1700
2511
def process_request(self, request, address):
1701
2512
"""Start a new process to process the request."""
1702
proc = multiprocessing.Process(target = self.sub_process_main,
2513
proc = multiprocessing.Process(target=self.sub_process_main,
2514
args=(request, address))
1709
2519
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1710
2520
""" adds a pipe to the MixIn """
1711
2522
def process_request(self, request, client_address):
1712
2523
"""Overrides and wraps the original process_request().
1714
2525
This function creates a new pipe in self.pipe
1716
2527
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1718
2529
proc = MultiprocessingMixIn.process_request(self, request,
1719
2530
client_address)
1720
2531
self.child_pipe.close()
1721
2532
self.add_pipe(parent_pipe, proc)
1723
2534
def add_pipe(self, parent_pipe, proc):
1724
2535
"""Dummy function; override as necessary"""
1725
raise NotImplementedError
2536
raise NotImplementedError()
1728
2539
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1729
2540
socketserver.TCPServer, object):
1730
2541
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1733
2544
enabled: Boolean; whether this server is activated yet
1734
2545
interface: None or a network interface name (string)
1735
2546
use_ipv6: Boolean; to use IPv6 or not
1737
2549
def __init__(self, server_address, RequestHandlerClass,
1738
interface=None, use_ipv6=True):
2553
"""If socketfd is set, use that file descriptor instead of
2554
creating a new one with socket.socket().
1739
2556
self.interface = interface
1741
2558
self.address_family = socket.AF_INET6
2559
if socketfd is not None:
2560
# Save the file descriptor
2561
self.socketfd = socketfd
2562
# Save the original socket.socket() function
2563
self.socket_socket = socket.socket
2565
# To implement --socket, we monkey patch socket.socket.
2567
# (When socketserver.TCPServer is a new-style class, we
2568
# could make self.socket into a property instead of monkey
2569
# patching socket.socket.)
2571
# Create a one-time-only replacement for socket.socket()
2572
@functools.wraps(socket.socket)
2573
def socket_wrapper(*args, **kwargs):
2574
# Restore original function so subsequent calls are
2576
socket.socket = self.socket_socket
2577
del self.socket_socket
2578
# This time only, return a new socket object from the
2579
# saved file descriptor.
2580
return socket.fromfd(self.socketfd, *args, **kwargs)
2581
# Replace socket.socket() function with wrapper
2582
socket.socket = socket_wrapper
2583
# The socketserver.TCPServer.__init__ will call
2584
# socket.socket(), which might be our replacement,
2585
# socket_wrapper(), if socketfd was set.
1742
2586
socketserver.TCPServer.__init__(self, server_address,
1743
2587
RequestHandlerClass)
1744
2589
def server_bind(self):
1745
2590
"""This overrides the normal server_bind() function
1746
2591
to bind to an interface if one was specified, and also NOT to
1747
2592
bind to an address or port if they were not specified."""
2593
global SO_BINDTODEVICE
1748
2594
if self.interface is not None:
1749
2595
if SO_BINDTODEVICE is None:
1750
logger.error("SO_BINDTODEVICE does not exist;"
1751
" cannot bind to interface %s",
1755
self.socket.setsockopt(socket.SOL_SOCKET,
1759
except socket.error as error:
1760
if error[0] == errno.EPERM:
1761
logger.error("No permission to"
1762
" bind to interface %s",
1764
elif error[0] == errno.ENOPROTOOPT:
1765
logger.error("SO_BINDTODEVICE not available;"
1766
" cannot bind to interface %s",
2596
# Fall back to a hard-coded value which seems to be
2598
logger.warning("SO_BINDTODEVICE not found, trying 25")
2599
SO_BINDTODEVICE = 25
2601
self.socket.setsockopt(
2602
socket.SOL_SOCKET, SO_BINDTODEVICE,
2603
(self.interface + "\0").encode("utf-8"))
2604
except socket.error as error:
2605
if error.errno == errno.EPERM:
2606
logger.error("No permission to bind to"
2607
" interface %s", self.interface)
2608
elif error.errno == errno.ENOPROTOOPT:
2609
logger.error("SO_BINDTODEVICE not available;"
2610
" cannot bind to interface %s",
2612
elif error.errno == errno.ENODEV:
2613
logger.error("Interface %s does not exist,"
2614
" cannot bind", self.interface)
1770
2617
# Only bind(2) the socket if we really need to.
1771
2618
if self.server_address[0] or self.server_address[1]:
1772
2619
if not self.server_address[0]:
1773
2620
if self.address_family == socket.AF_INET6:
1774
any_address = "::" # in6addr_any
2621
any_address = "::" # in6addr_any
1776
any_address = socket.INADDR_ANY
2623
any_address = "0.0.0.0" # INADDR_ANY
1777
2624
self.server_address = (any_address,
1778
2625
self.server_address[1])
1779
2626
elif not self.server_address[1]:
1780
self.server_address = (self.server_address[0],
2627
self.server_address = (self.server_address[0], 0)
1782
2628
# if self.interface:
1783
2629
# self.server_address = (self.server_address[0],
1809
2660
self.gnutls_priority = gnutls_priority
1810
2661
IPv6_TCPServer.__init__(self, server_address,
1811
2662
RequestHandlerClass,
1812
interface = interface,
1813
use_ipv6 = use_ipv6)
2663
interface=interface,
1814
2667
def server_activate(self):
1815
2668
if self.enabled:
1816
2669
return socketserver.TCPServer.server_activate(self)
1818
2671
def enable(self):
1819
2672
self.enabled = True
1821
2674
def add_pipe(self, parent_pipe, proc):
1822
2675
# Call "handle_ipc" for both data and EOF events
1823
gobject.io_add_watch(parent_pipe.fileno(),
1824
gobject.IO_IN | gobject.IO_HUP,
1825
functools.partial(self.handle_ipc,
1830
def handle_ipc(self, source, condition, parent_pipe=None,
1831
proc = None, client_object=None):
1833
gobject.IO_IN: "IN", # There is data to read.
1834
gobject.IO_OUT: "OUT", # Data can be written (without
1836
gobject.IO_PRI: "PRI", # There is urgent data to read.
1837
gobject.IO_ERR: "ERR", # Error condition.
1838
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1839
# broken, usually for pipes and
1842
conditions_string = ' | '.join(name
1844
condition_names.iteritems()
1845
if cond & condition)
2677
parent_pipe.fileno(),
2678
GLib.IO_IN | GLib.IO_HUP,
2679
functools.partial(self.handle_ipc,
2680
parent_pipe=parent_pipe,
2683
def handle_ipc(self, source, condition,
2686
client_object=None):
1846
2687
# error, or the other end of multiprocessing.Pipe has closed
1847
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2688
if condition & (GLib.IO_ERR | GLib.IO_HUP):
1848
2689
# Wait for other process to exit
1852
2693
# Read a request from the child
1853
2694
request = parent_pipe.recv()
1854
2695
command = request[0]
1856
2697
if command == 'init':
1858
address = request[2]
1860
for c in self.clients.itervalues():
1861
if c.fingerprint == fpr:
2698
key_id = request[1].decode("ascii")
2699
fpr = request[2].decode("ascii")
2700
address = request[3]
2702
for c in self.clients.values():
2703
if key_id and c.key_id == key_id:
2706
if fpr and c.fingerprint == fpr:
1865
logger.info("Client not found for fingerprint: %s, ad"
1866
"dress: %s", fpr, address)
2710
logger.info("Client not found for key ID: %s, address"
2711
": %s", key_id or fpr, address)
1867
2712
if self.use_dbus:
1868
2713
# Emit D-Bus signal
1869
mandos_dbus_service.ClientNotFound(fpr,
2714
mandos_dbus_service.ClientNotFound(key_id or fpr,
1871
2716
parent_pipe.send(False)
1874
gobject.io_add_watch(parent_pipe.fileno(),
1875
gobject.IO_IN | gobject.IO_HUP,
1876
functools.partial(self.handle_ipc,
2720
parent_pipe.fileno(),
2721
GLib.IO_IN | GLib.IO_HUP,
2722
functools.partial(self.handle_ipc,
2723
parent_pipe=parent_pipe,
2725
client_object=client))
1882
2726
parent_pipe.send(True)
1883
2727
# remove the old hook in favor of the new above hook on
1887
2731
funcname = request[1]
1888
2732
args = request[2]
1889
2733
kwargs = request[3]
1891
2735
parent_pipe.send(('data', getattr(client_object,
1892
2736
funcname)(*args,
1895
2739
if command == 'getattr':
1896
2740
attrname = request[1]
1897
if callable(client_object.__getattribute__(attrname)):
1898
parent_pipe.send(('function',))
2741
if isinstance(client_object.__getattribute__(attrname),
2742
collections.Callable):
2743
parent_pipe.send(('function', ))
1900
parent_pipe.send(('data', client_object
1901
.__getattribute__(attrname)))
2746
'data', client_object.__getattribute__(attrname)))
1903
2748
if command == 'setattr':
1904
2749
attrname = request[1]
1905
2750
value = request[2]
1906
2751
setattr(client_object, attrname, value)
2756
def rfc3339_duration_to_delta(duration):
2757
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2759
>>> rfc3339_duration_to_delta("P7D")
2760
datetime.timedelta(7)
2761
>>> rfc3339_duration_to_delta("PT60S")
2762
datetime.timedelta(0, 60)
2763
>>> rfc3339_duration_to_delta("PT60M")
2764
datetime.timedelta(0, 3600)
2765
>>> rfc3339_duration_to_delta("PT24H")
2766
datetime.timedelta(1)
2767
>>> rfc3339_duration_to_delta("P1W")
2768
datetime.timedelta(7)
2769
>>> rfc3339_duration_to_delta("PT5M30S")
2770
datetime.timedelta(0, 330)
2771
>>> rfc3339_duration_to_delta("P1DT3M20S")
2772
datetime.timedelta(1, 200)
2775
# Parsing an RFC 3339 duration with regular expressions is not
2776
# possible - there would have to be multiple places for the same
2777
# values, like seconds. The current code, while more esoteric, is
2778
# cleaner without depending on a parsing library. If Python had a
2779
# built-in library for parsing we would use it, but we'd like to
2780
# avoid excessive use of external libraries.
2782
# New type for defining tokens, syntax, and semantics all-in-one
2783
Token = collections.namedtuple("Token", (
2784
"regexp", # To match token; if "value" is not None, must have
2785
# a "group" containing digits
2786
"value", # datetime.timedelta or None
2787
"followers")) # Tokens valid after this token
2788
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2789
# the "duration" ABNF definition in RFC 3339, Appendix A.
2790
token_end = Token(re.compile(r"$"), None, frozenset())
2791
token_second = Token(re.compile(r"(\d+)S"),
2792
datetime.timedelta(seconds=1),
2793
frozenset((token_end, )))
2794
token_minute = Token(re.compile(r"(\d+)M"),
2795
datetime.timedelta(minutes=1),
2796
frozenset((token_second, token_end)))
2797
token_hour = Token(re.compile(r"(\d+)H"),
2798
datetime.timedelta(hours=1),
2799
frozenset((token_minute, token_end)))
2800
token_time = Token(re.compile(r"T"),
2802
frozenset((token_hour, token_minute,
2804
token_day = Token(re.compile(r"(\d+)D"),
2805
datetime.timedelta(days=1),
2806
frozenset((token_time, token_end)))
2807
token_month = Token(re.compile(r"(\d+)M"),
2808
datetime.timedelta(weeks=4),
2809
frozenset((token_day, token_end)))
2810
token_year = Token(re.compile(r"(\d+)Y"),
2811
datetime.timedelta(weeks=52),
2812
frozenset((token_month, token_end)))
2813
token_week = Token(re.compile(r"(\d+)W"),
2814
datetime.timedelta(weeks=1),
2815
frozenset((token_end, )))
2816
token_duration = Token(re.compile(r"P"), None,
2817
frozenset((token_year, token_month,
2818
token_day, token_time,
2820
# Define starting values:
2822
value = datetime.timedelta()
2824
# Following valid tokens
2825
followers = frozenset((token_duration, ))
2826
# String left to parse
2828
# Loop until end token is found
2829
while found_token is not token_end:
2830
# Search for any currently valid tokens
2831
for token in followers:
2832
match = token.regexp.match(s)
2833
if match is not None:
2835
if token.value is not None:
2836
# Value found, parse digits
2837
factor = int(match.group(1), 10)
2838
# Add to value so far
2839
value += factor * token.value
2840
# Strip token from string
2841
s = token.regexp.sub("", s, 1)
2844
# Set valid next tokens
2845
followers = found_token.followers
2848
# No currently valid tokens were found
2849
raise ValueError("Invalid RFC 3339 duration: {!r}"
1911
2855
def string_to_delta(interval):
1912
2856
"""Parse a string and return a datetime.timedelta
1914
2858
>>> string_to_delta('7d')
1915
2859
datetime.timedelta(7)
1916
2860
>>> string_to_delta('60s')
2005
2955
parser.add_argument("--no-dbus", action="store_false",
2006
2956
dest="use_dbus", help="Do not provide D-Bus"
2007
" system bus interface")
2957
" system bus interface", default=None)
2008
2958
parser.add_argument("--no-ipv6", action="store_false",
2009
dest="use_ipv6", help="Do not use IPv6")
2959
dest="use_ipv6", help="Do not use IPv6",
2010
2961
parser.add_argument("--no-restore", action="store_false",
2011
2962
dest="restore", help="Do not restore stored"
2963
" state", default=None)
2964
parser.add_argument("--socket", type=int,
2965
help="Specify a file descriptor to a network"
2966
" socket to use instead of creating one")
2013
2967
parser.add_argument("--statedir", metavar="DIR",
2014
2968
help="Directory to save/restore state in")
2969
parser.add_argument("--foreground", action="store_true",
2970
help="Run in foreground", default=None)
2971
parser.add_argument("--no-zeroconf", action="store_false",
2972
dest="zeroconf", help="Do not use Zeroconf",
2016
2975
options = parser.parse_args()
2018
2977
if options.check:
2979
fail_count, test_count = doctest.testmod()
2980
sys.exit(os.EX_OK if fail_count == 0 else 1)
2023
2982
# Default values for config file for server-global settings
2024
server_defaults = { "interface": "",
2029
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2030
"servicename": "Mandos",
2035
"statedir": "/var/lib/mandos"
2983
if gnutls.has_rawpk:
2984
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2985
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2987
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2988
":+SIGN-DSA-SHA256")
2989
server_defaults = {"interface": "",
2993
"priority": priority,
2994
"servicename": "Mandos",
3000
"statedir": "/var/lib/mandos",
3001
"foreground": "False",
2038
3006
# Parse config file for server-global settings
2039
3007
server_config = configparser.SafeConfigParser(server_defaults)
2040
3008
del server_defaults
2041
server_config.read(os.path.join(options.configdir,
3009
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2043
3010
# Convert the SafeConfigParser object to a dict
2044
3011
server_settings = server_config.defaults()
2045
3012
# Use the appropriate methods on the non-string config options
2046
for option in ("debug", "use_dbus", "use_ipv6"):
3013
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3014
"foreground", "zeroconf"):
2047
3015
server_settings[option] = server_config.getboolean("DEFAULT",
2049
3017
if server_settings["port"]:
2050
3018
server_settings["port"] = server_config.getint("DEFAULT",
3020
if server_settings["socket"]:
3021
server_settings["socket"] = server_config.getint("DEFAULT",
3023
# Later, stdin will, and stdout and stderr might, be dup'ed
3024
# over with an opened os.devnull. But we don't want this to
3025
# happen with a supplied network socket.
3026
if 0 <= server_settings["socket"] <= 2:
3027
server_settings["socket"] = os.dup(server_settings
2052
3029
del server_config
2054
3031
# Override the settings from the config file with command line
2055
3032
# options, if set.
2056
3033
for option in ("interface", "address", "port", "debug",
2057
"priority", "servicename", "configdir",
2058
"use_dbus", "use_ipv6", "debuglevel", "restore",
3034
"priority", "servicename", "configdir", "use_dbus",
3035
"use_ipv6", "debuglevel", "restore", "statedir",
3036
"socket", "foreground", "zeroconf"):
2060
3037
value = getattr(options, option)
2061
3038
if value is not None:
2062
3039
server_settings[option] = value
2064
3041
# Force all strings to be unicode
2065
3042
for option in server_settings.keys():
2066
if type(server_settings[option]) is str:
2067
server_settings[option] = unicode(server_settings[option])
3043
if isinstance(server_settings[option], bytes):
3044
server_settings[option] = (server_settings[option]
3046
# Force all boolean options to be boolean
3047
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3048
"foreground", "zeroconf"):
3049
server_settings[option] = bool(server_settings[option])
3050
# Debug implies foreground
3051
if server_settings["debug"]:
3052
server_settings["foreground"] = True
2068
3053
# Now we have our good server settings in "server_settings"
2070
3055
##################################################################
3057
if (not server_settings["zeroconf"]
3058
and not (server_settings["port"]
3059
or server_settings["socket"] != "")):
3060
parser.error("Needs port or socket to work without Zeroconf")
2072
3062
# For convenience
2073
3063
debug = server_settings["debug"]
2074
3064
debuglevel = server_settings["debuglevel"]
2076
3066
use_ipv6 = server_settings["use_ipv6"]
2077
3067
stored_state_path = os.path.join(server_settings["statedir"],
2078
3068
stored_state_file)
3069
foreground = server_settings["foreground"]
3070
zeroconf = server_settings["zeroconf"]
2081
initlogger(logging.DEBUG)
3073
initlogger(debug, logging.DEBUG)
2083
3075
if not debuglevel:
2086
3078
level = getattr(logging, debuglevel.upper())
3079
initlogger(debug, level)
2089
3081
if server_settings["servicename"] != "Mandos":
2090
syslogger.setFormatter(logging.Formatter
2091
('Mandos (%s) [%%(process)d]:'
2092
' %%(levelname)s: %%(message)s'
2093
% server_settings["servicename"]))
3082
syslogger.setFormatter(
3083
logging.Formatter('Mandos ({}) [%(process)d]:'
3084
' %(levelname)s: %(message)s'.format(
3085
server_settings["servicename"])))
2095
3087
# Parse config file with clients
2096
client_config = configparser.SafeConfigParser(Client.client_defaults)
3088
client_config = configparser.SafeConfigParser(Client
2097
3090
client_config.read(os.path.join(server_settings["configdir"],
2098
3091
"clients.conf"))
2100
3093
global mandos_dbus_service
2101
3094
mandos_dbus_service = None
2103
tcp_server = MandosServer((server_settings["address"],
2104
server_settings["port"]),
2106
interface=(server_settings["interface"]
2110
server_settings["priority"],
2113
pidfilename = "/var/run/mandos.pid"
2115
pidfile = open(pidfilename, "w")
2117
logger.error("Could not open file %r", pidfilename)
2120
uid = pwd.getpwnam("_mandos").pw_uid
2121
gid = pwd.getpwnam("_mandos").pw_gid
2124
uid = pwd.getpwnam("mandos").pw_uid
2125
gid = pwd.getpwnam("mandos").pw_gid
3097
if server_settings["socket"] != "":
3098
socketfd = server_settings["socket"]
3099
tcp_server = MandosServer(
3100
(server_settings["address"], server_settings["port"]),
3102
interface=(server_settings["interface"] or None),
3104
gnutls_priority=server_settings["priority"],
3108
pidfilename = "/run/mandos.pid"
3109
if not os.path.isdir("/run/."):
3110
pidfilename = "/var/run/mandos.pid"
3113
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3114
except IOError as e:
3115
logger.error("Could not open file %r", pidfilename,
3118
for name, group in (("_mandos", "_mandos"),
3119
("mandos", "mandos"),
3120
("nobody", "nogroup")):
3122
uid = pwd.getpwnam(name).pw_uid
3123
gid = pwd.getpwnam(group).pw_gid
2126
3125
except KeyError:
2128
uid = pwd.getpwnam("nobody").pw_uid
2129
gid = pwd.getpwnam("nobody").pw_gid
3134
logger.debug("Did setuid/setgid to {}:{}".format(uid,
2136
3136
except OSError as error:
2137
if error[0] != errno.EPERM:
3137
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3138
.format(uid, gid, os.strerror(error.errno)))
3139
if error.errno != errno.EPERM:
2141
3143
# Enable all possible GnuTLS debugging
2143
3145
# "Use a log level over 10 to enable all debugging options."
2144
3146
# - GnuTLS manual
2145
gnutls.library.functions.gnutls_global_set_log_level(11)
2147
@gnutls.library.types.gnutls_log_func
3147
gnutls.global_set_log_level(11)
2148
3150
def debug_gnutls(level, string):
2149
3151
logger.debug("GnuTLS: %s", string[:-1])
2151
(gnutls.library.functions
2152
.gnutls_global_set_log_function(debug_gnutls))
3153
gnutls.global_set_log_function(debug_gnutls)
2154
3155
# Redirect stdin so all checkers get /dev/null
2155
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3156
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2156
3157
os.dup2(null, sys.stdin.fileno())
2160
# No console logging
2161
logger.removeHandler(console)
2163
3161
# Need to fork before connecting to D-Bus
2165
3163
# Close all input and output, do double fork, etc.
3166
# multiprocessing will use threads, so before we use GLib we need
3167
# to inform GLib that threads will be used.
2168
3170
global main_loop
2169
3171
# From the Avahi example code
2170
DBusGMainLoop(set_as_default=True )
2171
main_loop = gobject.MainLoop()
3172
DBusGMainLoop(set_as_default=True)
3173
main_loop = GLib.MainLoop()
2172
3174
bus = dbus.SystemBus()
2173
3175
# End of Avahi example code
2176
3178
bus_name = dbus.service.BusName("se.recompile.Mandos",
2177
bus, do_not_queue=True)
2178
old_bus_name = (dbus.service.BusName
2179
("se.bsnet.fukt.Mandos", bus,
2181
except dbus.exceptions.NameExistsException as e:
2182
logger.error(unicode(e) + ", disabling D-Bus")
3181
old_bus_name = dbus.service.BusName(
3182
"se.bsnet.fukt.Mandos", bus,
3184
except dbus.exceptions.DBusException as e:
3185
logger.error("Disabling D-Bus:", exc_info=e)
2183
3186
use_dbus = False
2184
3187
server_settings["use_dbus"] = False
2185
3188
tcp_server.use_dbus = False
2186
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2187
service = AvahiServiceToSyslog(name =
2188
server_settings["servicename"],
2189
servicetype = "_mandos._tcp",
2190
protocol = protocol, bus = bus)
2191
if server_settings["interface"]:
2192
service.interface = (if_nametoindex
2193
(str(server_settings["interface"])))
3190
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3191
service = AvahiServiceToSyslog(
3192
name=server_settings["servicename"],
3193
servicetype="_mandos._tcp",
3196
if server_settings["interface"]:
3197
service.interface = if_nametoindex(
3198
server_settings["interface"].encode("utf-8"))
2195
3200
global multiprocessing_manager
2196
3201
multiprocessing_manager = multiprocessing.Manager()
2198
3203
client_class = Client
2200
client_class = functools.partial(ClientDBusTransitional,
3205
client_class = functools.partial(ClientDBus, bus=bus)
2203
3207
client_settings = Client.config_parser(client_config)
2204
3208
old_client_settings = {}
2205
3209
clients_data = {}
3211
# This is used to redirect stdout and stderr for checker processes
3213
wnull = open(os.devnull, "w") # A writable /dev/null
3214
# Only used if server is running in foreground but not in debug
3216
if debug or not foreground:
2207
3219
# Get client data and settings from last running state.
2208
3220
if server_settings["restore"]:
2210
3222
with open(stored_state_path, "rb") as stored_state:
2211
clients_data, old_client_settings = (pickle.load
3223
if sys.version_info.major == 2:
3224
clients_data, old_client_settings = pickle.load(
3227
bytes_clients_data, bytes_old_client_settings = (
3228
pickle.load(stored_state, encoding="bytes"))
3229
# Fix bytes to strings
3232
clients_data = {(key.decode("utf-8")
3233
if isinstance(key, bytes)
3236
bytes_clients_data.items()}
3237
del bytes_clients_data
3238
for key in clients_data:
3239
value = {(k.decode("utf-8")
3240
if isinstance(k, bytes) else k): v
3242
clients_data[key].items()}
3243
clients_data[key] = value
3245
value["client_structure"] = [
3247
if isinstance(s, bytes)
3249
value["client_structure"]]
3251
for k in ("name", "host"):
3252
if isinstance(value[k], bytes):
3253
value[k] = value[k].decode("utf-8")
3254
if not value.has_key("key_id"):
3255
value["key_id"] = ""
3256
elif not value.has_key("fingerprint"):
3257
value["fingerprint"] = ""
3258
# old_client_settings
3260
old_client_settings = {
3261
(key.decode("utf-8")
3262
if isinstance(key, bytes)
3265
bytes_old_client_settings.items()}
3266
del bytes_old_client_settings
3268
for value in old_client_settings.values():
3269
if isinstance(value["host"], bytes):
3270
value["host"] = (value["host"]
2213
3272
os.remove(stored_state_path)
2214
3273
except IOError as e:
2215
logger.warning("Could not load persistent state: {0}"
2217
if e.errno != errno.ENOENT:
3274
if e.errno == errno.ENOENT:
3275
logger.warning("Could not load persistent state:"
3276
" {}".format(os.strerror(e.errno)))
3278
logger.critical("Could not load persistent state:",
3281
except EOFError as e:
3282
logger.warning("Could not load persistent state: "
2220
3286
with PGPEngine() as pgp:
2221
for client_name, client in clients_data.iteritems():
3287
for client_name, client in clients_data.items():
3288
# Skip removed clients
3289
if client_name not in client_settings:
2222
3292
# Decide which value to use after restoring saved state.
2223
3293
# We have three different values: Old config file,
2224
3294
# new config file, and saved state.
2229
3299
# For each value in new config, check if it
2230
3300
# differs from the old config value (Except for
2231
3301
# the "secret" attribute)
2232
if (name != "secret" and
2233
value != old_client_settings[client_name]
3302
if (name != "secret"
3304
old_client_settings[client_name][name])):
2235
3305
client[name] = value
2236
3306
except KeyError:
2239
3309
# Clients who has passed its expire date can still be
2240
# enabled if its last checker was successful. Clients
2241
# whose checker failed before we stored its state is
2242
# assumed to have failed all checkers during downtime.
3310
# enabled if its last checker was successful. A Client
3311
# whose checker succeeded before we stored its state is
3312
# assumed to have successfully run all checkers during
2243
3314
if client["enabled"]:
2244
3315
if datetime.datetime.utcnow() >= client["expires"]:
2245
3316
if not client["last_checked_ok"]:
2246
3317
logger.warning(
2247
"disabling client {0} - Client never "
2248
"performed a successfull checker"
2249
.format(client["name"]))
3318
"disabling client {} - Client never "
3319
"performed a successful checker".format(
2250
3321
client["enabled"] = False
2251
3322
elif client["last_checker_status"] != 0:
2252
3323
logger.warning(
2253
"disabling client {0} - Client "
2254
"last checker failed with error code {1}"
2255
.format(client["name"],
2256
client["last_checker_status"]))
3324
"disabling client {} - Client last"
3325
" checker failed with error code"
3328
client["last_checker_status"]))
2257
3329
client["enabled"] = False
2259
client["expires"] = (datetime.datetime
2261
+ client["timeout"])
3331
client["expires"] = (
3332
datetime.datetime.utcnow()
3333
+ client["timeout"])
3334
logger.debug("Last checker succeeded,"
3335
" keeping {} enabled".format(
2264
client["secret"] = (
2265
pgp.decrypt(client["encrypted_secret"],
2266
client_settings[client_name]
3338
client["secret"] = pgp.decrypt(
3339
client["encrypted_secret"],
3340
client_settings[client_name]["secret"])
2268
3341
except PGPError:
2269
3342
# If decryption fails, we use secret from new settings
2270
logger.debug("Failed to decrypt {0} old secret"
2271
.format(client_name))
2272
client["secret"] = (
2273
client_settings[client_name]["secret"])
3343
logger.debug("Failed to decrypt {} old secret".format(
3345
client["secret"] = (client_settings[client_name]
2276
3348
# Add/remove clients based on new changes made to config
2277
for client_name in set(old_client_settings) - set(client_settings):
3349
for client_name in (set(old_client_settings)
3350
- set(client_settings)):
2278
3351
del clients_data[client_name]
2279
for client_name in set(client_settings) - set(old_client_settings):
3352
for client_name in (set(client_settings)
3353
- set(old_client_settings)):
2280
3354
clients_data[client_name] = client_settings[client_name]
2282
# Create clients all clients
2283
for client_name, client in clients_data.iteritems():
3356
# Create all client objects
3357
for client_name, client in clients_data.items():
2284
3358
tcp_server.clients[client_name] = client_class(
2285
name = client_name, settings = client)
3361
server_settings=server_settings)
2287
3363
if not tcp_server.clients:
2288
3364
logger.warning("No clients defined")
2294
pidfile.write(str(pid) + "\n".encode("utf-8"))
2297
logger.error("Could not write to file %r with PID %d",
2300
# "pidfile" was never created
3367
if pidfile is not None:
3371
print(pid, file=pidfile)
3373
logger.error("Could not write to file %r with PID %d",
2302
3376
del pidfilename
2303
signal.signal(signal.SIGINT, signal.SIG_IGN)
2305
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2306
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3378
for termsig in (signal.SIGHUP, signal.SIGTERM):
3379
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3380
lambda: main_loop.quit() and False)
2309
class MandosDBusService(dbus.service.Object):
3384
@alternate_dbus_interfaces(
3385
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3386
class MandosDBusService(DBusObjectWithObjectManager):
2310
3387
"""A D-Bus proxy object"""
2311
3389
def __init__(self):
2312
3390
dbus.service.Object.__init__(self, bus, "/")
2313
3392
_interface = "se.recompile.Mandos"
2315
3394
@dbus.service.signal(_interface, signature="o")
2316
3395
def ClientAdded(self, objpath):
2320
3399
@dbus.service.signal(_interface, signature="ss")
2321
def ClientNotFound(self, fingerprint, address):
3400
def ClientNotFound(self, key_id, address):
3404
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2325
3406
@dbus.service.signal(_interface, signature="os")
2326
3407
def ClientRemoved(self, objpath, name):
3411
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2330
3413
@dbus.service.method(_interface, out_signature="ao")
2331
3414
def GetAllClients(self):
2333
return dbus.Array(c.dbus_object_path
2335
tcp_server.clients.itervalues())
3416
return dbus.Array(c.dbus_object_path for c in
3417
tcp_server.clients.values())
3419
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2337
3421
@dbus.service.method(_interface,
2338
3422
out_signature="a{oa{sv}}")
2339
3423
def GetAllClientsWithProperties(self):
2341
3425
return dbus.Dictionary(
2342
((c.dbus_object_path, c.GetAll(""))
2343
for c in tcp_server.clients.itervalues()),
3426
{c.dbus_object_path: c.GetAll(
3427
"se.recompile.Mandos.Client")
3428
for c in tcp_server.clients.values()},
2344
3429
signature="oa{sv}")
2346
3431
@dbus.service.method(_interface, in_signature="o")
2347
3432
def RemoveClient(self, object_path):
2349
for c in tcp_server.clients.itervalues():
3434
for c in tcp_server.clients.values():
2350
3435
if c.dbus_object_path == object_path:
2351
3436
del tcp_server.clients[c.name]
2352
3437
c.remove_from_connection()
2353
# Don't signal anything except ClientRemoved
3438
# Don't signal the disabling
2354
3439
c.disable(quiet=True)
2356
self.ClientRemoved(object_path, c.name)
3440
# Emit D-Bus signal for removal
3441
self.client_removed_signal(c)
2358
3443
raise KeyError(object_path)
2362
class MandosDBusServiceTransitional(MandosDBusService):
2363
__metaclass__ = AlternateDBusNamesMetaclass
2364
mandos_dbus_service = MandosDBusServiceTransitional()
3447
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3448
out_signature="a{oa{sa{sv}}}")
3449
def GetManagedObjects(self):
3451
return dbus.Dictionary(
3452
{client.dbus_object_path:
3454
{interface: client.GetAll(interface)
3456
client._get_all_interface_names()})
3457
for client in tcp_server.clients.values()})
3459
def client_added_signal(self, client):
3460
"""Send the new standard signal and the old signal"""
3462
# New standard signal
3463
self.InterfacesAdded(
3464
client.dbus_object_path,
3466
{interface: client.GetAll(interface)
3468
client._get_all_interface_names()}))
3470
self.ClientAdded(client.dbus_object_path)
3472
def client_removed_signal(self, client):
3473
"""Send the new standard signal and the old signal"""
3475
# New standard signal
3476
self.InterfacesRemoved(
3477
client.dbus_object_path,
3478
client._get_all_interface_names())
3480
self.ClientRemoved(client.dbus_object_path,
3483
mandos_dbus_service = MandosDBusService()
3485
# Save modules to variables to exempt the modules from being
3486
# unloaded before the function registered with atexit() is run.
3487
mp = multiprocessing
2367
3491
"Cleanup function; run on exit"
2370
multiprocessing.active_children()
3495
mp.active_children()
2371
3497
if not (tcp_server.clients or client_settings):
2374
3500
# Store client before exiting. Secrets are encrypted with key
2375
3501
# based on what config file has. If config file is
2376
3502
# removed/edited, old secret will thus be unrecovable.
2378
3504
with PGPEngine() as pgp:
2379
for client in tcp_server.clients.itervalues():
3505
for client in tcp_server.clients.values():
2380
3506
key = client_settings[client.name]["secret"]
2381
3507
client.encrypted_secret = pgp.encrypt(client.secret,
2383
3509
client_dict = {}
2385
3511
# A list of attributes that can not be pickled
2387
exclude = set(("bus", "changedstate", "secret",
2389
for name, typ in (inspect.getmembers
2390
(dbus.service.Object)):
3513
exclude = {"bus", "changedstate", "secret",
3514
"checker", "server_settings"}
3515
for name, typ in inspect.getmembers(dbus.service
2391
3517
exclude.add(name)
2393
3519
client_dict["encrypted_secret"] = (client
2394
3520
.encrypted_secret)
2395
3521
for attr in client.client_structure:
2396
3522
if attr not in exclude:
2397
3523
client_dict[attr] = getattr(client, attr)
2399
3525
clients[client.name] = client_dict
2400
3526
del client_settings[client.name]["secret"]
2403
with os.fdopen(os.open(stored_state_path,
2404
os.O_CREAT|os.O_WRONLY|os.O_TRUNC,
2405
0600), "wb") as stored_state:
2406
pickle.dump((clients, client_settings), stored_state)
3529
with tempfile.NamedTemporaryFile(
3533
dir=os.path.dirname(stored_state_path),
3534
delete=False) as stored_state:
3535
pickle.dump((clients, client_settings), stored_state,
3537
tempname = stored_state.name
3538
os.rename(tempname, stored_state_path)
2407
3539
except (IOError, OSError) as e:
2408
logger.warning("Could not save persistent state: {0}"
2410
if e.errno not in (errno.ENOENT, errno.EACCES):
3545
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3546
logger.warning("Could not save persistent state: {}"
3547
.format(os.strerror(e.errno)))
3549
logger.warning("Could not save persistent state:",
2413
3553
# Delete all clients, and settings from config
2414
3554
while tcp_server.clients:
2415
3555
name, client = tcp_server.clients.popitem()
2417
3557
client.remove_from_connection()
2418
# Don't signal anything except ClientRemoved
3558
# Don't signal the disabling
2419
3559
client.disable(quiet=True)
3560
# Emit D-Bus signal for removal
2422
mandos_dbus_service.ClientRemoved(client
3562
mandos_dbus_service.client_removed_signal(client)
2425
3563
client_settings.clear()
2427
3565
atexit.register(cleanup)
2429
for client in tcp_server.clients.itervalues():
3567
for client in tcp_server.clients.values():
2432
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3569
# Emit D-Bus signal for adding
3570
mandos_dbus_service.client_added_signal(client)
2433
3571
# Need to initiate checking of clients
2434
3572
if client.enabled:
2435
3573
client.init_checker()
2437
3575
tcp_server.enable()
2438
3576
tcp_server.server_activate()
2440
3578
# Find out what port we got
2441
service.port = tcp_server.socket.getsockname()[1]
3580
service.port = tcp_server.socket.getsockname()[1]
2443
3582
logger.info("Now listening on address %r, port %d,"
2444
" flowinfo %d, scope_id %d"
2445
% tcp_server.socket.getsockname())
3583
" flowinfo %d, scope_id %d",
3584
*tcp_server.socket.getsockname())
2447
logger.info("Now listening on address %r, port %d"
2448
% tcp_server.socket.getsockname())
2450
#service.interface = tcp_server.socket.getsockname()[3]
3586
logger.info("Now listening on address %r, port %d",
3587
*tcp_server.socket.getsockname())
3589
# service.interface = tcp_server.socket.getsockname()[3]
2453
# From the Avahi example code
2456
except dbus.exceptions.DBusException as error:
2457
logger.critical("DBusException: %s", error)
2460
# End of Avahi example code
2462
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2463
lambda *args, **kwargs:
2464
(tcp_server.handle_request
2465
(*args[2:], **kwargs) or True))
3593
# From the Avahi example code
3596
except dbus.exceptions.DBusException as error:
3597
logger.critical("D-Bus Exception", exc_info=error)
3600
# End of Avahi example code
3602
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3603
lambda *args, **kwargs:
3604
(tcp_server.handle_request
3605
(*args[2:], **kwargs) or True))
2467
3607
logger.debug("Starting main loop")
2468
3608
main_loop.run()
2469
3609
except AvahiError as error:
2470
logger.critical("AvahiError: %s", error)
3610
logger.critical("Avahi Error", exc_info=error)
2473
3613
except KeyboardInterrupt: