62
56
import logging.handlers
58
from contextlib import closing
69
import cPickle as pickle
72
import multiprocessing
81
64
import dbus.service
82
from gi.repository import GLib
83
67
from dbus.mainloop.glib import DBusGMainLoop
86
70
import xml.dom.minidom
89
# Try to find the value of SO_BINDTODEVICE:
91
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
92
# newer, and it is also the most natural place for it:
93
74
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
94
75
except AttributeError:
96
# This is where SO_BINDTODEVICE was up to and including Python
98
77
from IN import SO_BINDTODEVICE
99
78
except ImportError:
100
# In Python 2.7 it seems to have been removed entirely.
101
# Try running the C preprocessor:
103
cc = subprocess.Popen(["cc", "--language=c", "-E",
105
stdin=subprocess.PIPE,
106
stdout=subprocess.PIPE)
107
stdout = cc.communicate(
108
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
109
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
110
except (OSError, ValueError, IndexError):
112
SO_BINDTODEVICE = None
114
if sys.version_info.major == 2:
118
stored_state_file = "clients.pickle"
120
logger = logging.getLogger()
124
if_nametoindex = ctypes.cdll.LoadLibrary(
125
ctypes.util.find_library("c")).if_nametoindex
126
except (OSError, AttributeError):
128
def if_nametoindex(interface):
129
"Get an interface index the hard way, i.e. using fcntl()"
130
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
131
with contextlib.closing(socket.socket()) as s:
132
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
133
struct.pack(b"16s16x", interface))
134
interface_index = struct.unpack("I", ifreq[16:20])[0]
135
return interface_index
138
def copy_function(func):
139
"""Make a copy of a function"""
140
if sys.version_info.major == 2:
141
return types.FunctionType(func.func_code,
147
return types.FunctionType(func.__code__,
154
def initlogger(debug, level=logging.WARNING):
155
"""init logger and add loglevel"""
158
syslogger = (logging.handlers.SysLogHandler(
159
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
160
address = "/dev/log"))
161
syslogger.setFormatter(logging.Formatter
162
('Mandos [%(process)d]: %(levelname)s:'
164
logger.addHandler(syslogger)
167
console = logging.StreamHandler()
168
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
172
logger.addHandler(console)
173
logger.setLevel(level)
176
class PGPError(Exception):
177
"""Exception if encryption/decryption fails"""
181
class PGPEngine(object):
182
"""A simple class for OpenPGP symmetric encryption & decryption"""
185
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
188
output = subprocess.check_output(["gpgconf"])
189
for line in output.splitlines():
190
name, text, path = line.split(b":")
195
if e.errno != errno.ENOENT:
197
self.gnupgargs = ['--batch',
198
'--homedir', self.tempdir,
201
# Only GPG version 1 has the --no-use-agent option.
202
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
203
self.gnupgargs.append("--no-use-agent")
208
def __exit__(self, exc_type, exc_value, traceback):
216
if self.tempdir is not None:
217
# Delete contents of tempdir
218
for root, dirs, files in os.walk(self.tempdir,
220
for filename in files:
221
os.remove(os.path.join(root, filename))
223
os.rmdir(os.path.join(root, dirname))
225
os.rmdir(self.tempdir)
228
def password_encode(self, password):
229
# Passphrase can not be empty and can not contain newlines or
230
# NUL bytes. So we prefix it and hex encode it.
231
encoded = b"mandos" + binascii.hexlify(password)
232
if len(encoded) > 2048:
233
# GnuPG can't handle long passwords, so encode differently
234
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
235
.replace(b"\n", b"\\n")
236
.replace(b"\0", b"\\x00"))
239
def encrypt(self, data, password):
240
passphrase = self.password_encode(password)
241
with tempfile.NamedTemporaryFile(
242
dir=self.tempdir) as passfile:
243
passfile.write(passphrase)
245
proc = subprocess.Popen([self.gpg, '--symmetric',
249
stdin = subprocess.PIPE,
250
stdout = subprocess.PIPE,
251
stderr = subprocess.PIPE)
252
ciphertext, err = proc.communicate(input = data)
253
if proc.returncode != 0:
257
def decrypt(self, data, password):
258
passphrase = self.password_encode(password)
259
with tempfile.NamedTemporaryFile(
260
dir = self.tempdir) as passfile:
261
passfile.write(passphrase)
263
proc = subprocess.Popen([self.gpg, '--decrypt',
267
stdin = subprocess.PIPE,
268
stdout = subprocess.PIPE,
269
stderr = subprocess.PIPE)
270
decrypted_plaintext, err = proc.communicate(input = data)
271
if proc.returncode != 0:
273
return decrypted_plaintext
275
# Pretend that we have an Avahi module
277
"""This isn't so much a class as it is a module-like namespace.
278
It is instantiated once, and simulates having an Avahi module."""
279
IF_UNSPEC = -1 # avahi-common/address.h
280
PROTO_UNSPEC = -1 # avahi-common/address.h
281
PROTO_INET = 0 # avahi-common/address.h
282
PROTO_INET6 = 1 # avahi-common/address.h
283
DBUS_NAME = "org.freedesktop.Avahi"
284
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
285
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
286
DBUS_PATH_SERVER = "/"
287
def string_array_to_txt_array(self, t):
288
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
289
for s in t), signature="ay")
290
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
291
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
292
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
293
SERVER_INVALID = 0 # avahi-common/defs.h
294
SERVER_REGISTERING = 1 # avahi-common/defs.h
295
SERVER_RUNNING = 2 # avahi-common/defs.h
296
SERVER_COLLISION = 3 # avahi-common/defs.h
297
SERVER_FAILURE = 4 # avahi-common/defs.h
79
SO_BINDTODEVICE = None
84
logger = logging.Logger(u'mandos')
85
syslogger = (logging.handlers.SysLogHandler
86
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
87
address = "/dev/log"))
88
syslogger.setFormatter(logging.Formatter
89
(u'Mandos [%(process)d]: %(levelname)s:'
91
logger.addHandler(syslogger)
93
console = logging.StreamHandler()
94
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
97
logger.addHandler(console)
300
99
class AvahiError(Exception):
301
100
def __init__(self, value, *args, **kwargs):
302
101
self.value = value
303
return super(AvahiError, self).__init__(value, *args,
102
super(AvahiError, self).__init__(value, *args, **kwargs)
103
def __unicode__(self):
104
return unicode(repr(self.value))
307
106
class AvahiServiceError(AvahiError):
311
109
class AvahiGroupError(AvahiError):
415
189
dbus.UInt16(self.port),
416
190
avahi.string_array_to_txt_array(self.TXT))
417
191
self.group.Commit()
419
192
def entry_group_state_changed(self, state, error):
420
193
"""Derived from the Avahi example code"""
421
logger.debug("Avahi entry group state change: %i", state)
194
logger.debug(u"Avahi state change: %i", state)
423
196
if state == avahi.ENTRY_GROUP_ESTABLISHED:
424
logger.debug("Zeroconf service established.")
197
logger.debug(u"Zeroconf service established.")
425
198
elif state == avahi.ENTRY_GROUP_COLLISION:
426
logger.info("Zeroconf service name collision.")
199
logger.warning(u"Zeroconf service name collision.")
428
201
elif state == avahi.ENTRY_GROUP_FAILURE:
429
logger.critical("Avahi: Error in group state changed %s",
431
raise AvahiGroupError("State changed: {!s}".format(error))
202
logger.critical(u"Avahi: Error in group state changed %s",
204
raise AvahiGroupError(u"State changed: %s"
433
206
def cleanup(self):
434
207
"""Derived from the Avahi example code"""
435
208
if self.group is not None:
438
except (dbus.exceptions.UnknownMethodException,
439
dbus.exceptions.DBusException):
441
210
self.group = None
444
def server_state_changed(self, state, error=None):
211
def server_state_changed(self, state):
445
212
"""Derived from the Avahi example code"""
446
logger.debug("Avahi server state change: %i", state)
448
avahi.SERVER_INVALID: "Zeroconf server invalid",
449
avahi.SERVER_REGISTERING: None,
450
avahi.SERVER_COLLISION: "Zeroconf server name collision",
451
avahi.SERVER_FAILURE: "Zeroconf server failure",
453
if state in bad_states:
454
if bad_states[state] is not None:
456
logger.error(bad_states[state])
458
logger.error(bad_states[state] + ": %r", error)
213
if state == avahi.SERVER_COLLISION:
214
logger.error(u"Zeroconf server name collision")
460
216
elif state == avahi.SERVER_RUNNING:
463
except dbus.exceptions.DBusException as error:
464
if (error.get_dbus_name()
465
== "org.freedesktop.Avahi.CollisionError"):
466
logger.info("Local Zeroconf service name"
468
return self.rename(remove=False)
470
logger.critical("D-Bus Exception", exc_info=error)
475
logger.debug("Unknown state: %r", state)
477
logger.debug("Unknown state: %r: %r", state, error)
479
218
def activate(self):
480
219
"""Derived from the Avahi example code"""
481
220
if self.server is None:
482
221
self.server = dbus.Interface(
483
222
self.bus.get_object(avahi.DBUS_NAME,
484
avahi.DBUS_PATH_SERVER,
485
follow_name_owner_changes=True),
223
avahi.DBUS_PATH_SERVER),
486
224
avahi.DBUS_INTERFACE_SERVER)
487
self.server.connect_to_signal("StateChanged",
488
self.server_state_changed)
225
self.server.connect_to_signal(u"StateChanged",
226
self.server_state_changed)
489
227
self.server_state_changed(self.server.GetState())
492
class AvahiServiceToSyslog(AvahiService):
493
def rename(self, *args, **kwargs):
494
"""Add the new name to the syslog messages"""
495
ret = AvahiService.rename(self, *args, **kwargs)
496
syslogger.setFormatter(logging.Formatter(
497
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
501
# Pretend that we have a GnuTLS module
502
class GnuTLS(object):
503
"""This isn't so much a class as it is a module-like namespace.
504
It is instantiated once, and simulates having a GnuTLS module."""
506
_library = ctypes.cdll.LoadLibrary(
507
ctypes.util.find_library("gnutls"))
508
_need_version = b"3.3.0"
510
# Need to use class name "GnuTLS" here, since this method is
511
# called before the assignment to the "gnutls" global variable
513
if GnuTLS.check_version(self._need_version) is None:
514
raise GnuTLS.Error("Needs GnuTLS {} or later"
515
.format(self._need_version))
517
# Unless otherwise indicated, the constants and types below are
518
# all from the gnutls/gnutls.h C header file.
528
E_NO_CERTIFICATE_FOUND = -49
529
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
532
class session_int(ctypes.Structure):
534
session_t = ctypes.POINTER(session_int)
535
class certificate_credentials_st(ctypes.Structure):
537
certificate_credentials_t = ctypes.POINTER(
538
certificate_credentials_st)
539
certificate_type_t = ctypes.c_int
540
class datum_t(ctypes.Structure):
541
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
542
('size', ctypes.c_uint)]
543
class openpgp_crt_int(ctypes.Structure):
545
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
546
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
547
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
548
credentials_type_t = ctypes.c_int
549
transport_ptr_t = ctypes.c_void_p
550
close_request_t = ctypes.c_int
553
class Error(Exception):
554
# We need to use the class name "GnuTLS" here, since this
555
# exception might be raised from within GnuTLS.__init__,
556
# which is called before the assignment to the "gnutls"
557
# global variable has happened.
558
def __init__(self, message = None, code = None, args=()):
559
# Default usage is by a message string, but if a return
560
# code is passed, convert it to a string with
563
if message is None and code is not None:
564
message = GnuTLS.strerror(code)
565
return super(GnuTLS.Error, self).__init__(
568
class CertificateSecurityError(Error):
572
class Credentials(object):
574
self._c_object = gnutls.certificate_credentials_t()
575
gnutls.certificate_allocate_credentials(
576
ctypes.byref(self._c_object))
577
self.type = gnutls.CRD_CERTIFICATE
580
gnutls.certificate_free_credentials(self._c_object)
582
class ClientSession(object):
583
def __init__(self, socket, credentials = None):
584
self._c_object = gnutls.session_t()
585
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
586
gnutls.set_default_priority(self._c_object)
587
gnutls.transport_set_ptr(self._c_object, socket.fileno())
588
gnutls.handshake_set_private_extensions(self._c_object,
591
if credentials is None:
592
credentials = gnutls.Credentials()
593
gnutls.credentials_set(self._c_object, credentials.type,
594
ctypes.cast(credentials._c_object,
596
self.credentials = credentials
599
gnutls.deinit(self._c_object)
602
return gnutls.handshake(self._c_object)
604
def send(self, data):
608
data_len -= gnutls.record_send(self._c_object,
613
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
615
# Error handling functions
616
def _error_code(result):
617
"""A function to raise exceptions on errors, suitable
618
for the 'restype' attribute on ctypes functions"""
621
if result == gnutls.E_NO_CERTIFICATE_FOUND:
622
raise gnutls.CertificateSecurityError(code = result)
623
raise gnutls.Error(code = result)
625
def _retry_on_error(result, func, arguments):
626
"""A function to retry on some errors, suitable
627
for the 'errcheck' attribute on ctypes functions"""
629
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
630
return _error_code(result)
631
result = func(*arguments)
634
# Unless otherwise indicated, the function declarations below are
635
# all from the gnutls/gnutls.h C header file.
638
priority_set_direct = _library.gnutls_priority_set_direct
639
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
640
ctypes.POINTER(ctypes.c_char_p)]
641
priority_set_direct.restype = _error_code
643
init = _library.gnutls_init
644
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
645
init.restype = _error_code
647
set_default_priority = _library.gnutls_set_default_priority
648
set_default_priority.argtypes = [session_t]
649
set_default_priority.restype = _error_code
651
record_send = _library.gnutls_record_send
652
record_send.argtypes = [session_t, ctypes.c_void_p,
654
record_send.restype = ctypes.c_ssize_t
655
record_send.errcheck = _retry_on_error
657
certificate_allocate_credentials = (
658
_library.gnutls_certificate_allocate_credentials)
659
certificate_allocate_credentials.argtypes = [
660
ctypes.POINTER(certificate_credentials_t)]
661
certificate_allocate_credentials.restype = _error_code
663
certificate_free_credentials = (
664
_library.gnutls_certificate_free_credentials)
665
certificate_free_credentials.argtypes = [certificate_credentials_t]
666
certificate_free_credentials.restype = None
668
handshake_set_private_extensions = (
669
_library.gnutls_handshake_set_private_extensions)
670
handshake_set_private_extensions.argtypes = [session_t,
672
handshake_set_private_extensions.restype = None
674
credentials_set = _library.gnutls_credentials_set
675
credentials_set.argtypes = [session_t, credentials_type_t,
677
credentials_set.restype = _error_code
679
strerror = _library.gnutls_strerror
680
strerror.argtypes = [ctypes.c_int]
681
strerror.restype = ctypes.c_char_p
683
certificate_type_get = _library.gnutls_certificate_type_get
684
certificate_type_get.argtypes = [session_t]
685
certificate_type_get.restype = _error_code
687
certificate_get_peers = _library.gnutls_certificate_get_peers
688
certificate_get_peers.argtypes = [session_t,
689
ctypes.POINTER(ctypes.c_uint)]
690
certificate_get_peers.restype = ctypes.POINTER(datum_t)
692
global_set_log_level = _library.gnutls_global_set_log_level
693
global_set_log_level.argtypes = [ctypes.c_int]
694
global_set_log_level.restype = None
696
global_set_log_function = _library.gnutls_global_set_log_function
697
global_set_log_function.argtypes = [log_func]
698
global_set_log_function.restype = None
700
deinit = _library.gnutls_deinit
701
deinit.argtypes = [session_t]
702
deinit.restype = None
704
handshake = _library.gnutls_handshake
705
handshake.argtypes = [session_t]
706
handshake.restype = _error_code
707
handshake.errcheck = _retry_on_error
709
transport_set_ptr = _library.gnutls_transport_set_ptr
710
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
711
transport_set_ptr.restype = None
713
bye = _library.gnutls_bye
714
bye.argtypes = [session_t, close_request_t]
715
bye.restype = _error_code
716
bye.errcheck = _retry_on_error
718
check_version = _library.gnutls_check_version
719
check_version.argtypes = [ctypes.c_char_p]
720
check_version.restype = ctypes.c_char_p
722
# All the function declarations below are from gnutls/openpgp.h
724
openpgp_crt_init = _library.gnutls_openpgp_crt_init
725
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
726
openpgp_crt_init.restype = _error_code
728
openpgp_crt_import = _library.gnutls_openpgp_crt_import
729
openpgp_crt_import.argtypes = [openpgp_crt_t,
730
ctypes.POINTER(datum_t),
732
openpgp_crt_import.restype = _error_code
734
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
735
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
736
ctypes.POINTER(ctypes.c_uint)]
737
openpgp_crt_verify_self.restype = _error_code
739
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
740
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
741
openpgp_crt_deinit.restype = None
743
openpgp_crt_get_fingerprint = (
744
_library.gnutls_openpgp_crt_get_fingerprint)
745
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
749
openpgp_crt_get_fingerprint.restype = _error_code
751
# Remove non-public functions
752
del _error_code, _retry_on_error
753
# Create the global "gnutls" object, simulating a module
756
def call_pipe(connection, # : multiprocessing.Connection
757
func, *args, **kwargs):
758
"""This function is meant to be called by multiprocessing.Process
760
This function runs func(*args, **kwargs), and writes the resulting
761
return value on the provided multiprocessing.Connection.
763
connection.send(func(*args, **kwargs))
766
230
class Client(object):
767
231
"""A representation of a client host served by this server.
770
approved: bool(); 'None' if not yet approved/disapproved
771
approval_delay: datetime.timedelta(); Time to wait for approval
772
approval_duration: datetime.timedelta(); Duration of one approval
234
name: string; from the config file, used in log messages and
236
fingerprint: string (40 or 32 hexadecimal digits); used to
237
uniquely identify the client
238
secret: bytestring; sent verbatim (over TLS) to client
239
host: string; available for use by the checker command
240
created: datetime.datetime(); (UTC) object creation
241
last_enabled: datetime.datetime(); (UTC)
243
last_checked_ok: datetime.datetime(); (UTC) or None
244
timeout: datetime.timedelta(); How long from last_checked_ok
245
until this client is invalid
246
interval: datetime.timedelta(); How often to start a new checker
247
disable_hook: If set, called by disable() as disable_hook(self)
773
248
checker: subprocess.Popen(); a running checker process used
774
249
to see if the client lives.
775
250
'None' if no process is running.
776
checker_callback_tag: a GLib event source tag, or None
777
checker_command: string; External command which is run to check
778
if client lives. %() expansions are done at
251
checker_initiator_tag: a gobject event source tag, or None
252
disable_initiator_tag: - '' -
253
checker_callback_tag: - '' -
254
checker_command: string; External command which is run to check if
255
client lives. %() expansions are done at
779
256
runtime with vars(self) as dict, so that for
780
257
instance %(name)s can be used in the command.
781
checker_initiator_tag: a GLib event source tag, or None
782
created: datetime.datetime(); (UTC) object creation
783
client_structure: Object describing what attributes a client has
784
and is used for storing the client at exit
785
258
current_checker_command: string; current running checker_command
786
disable_initiator_tag: a GLib event source tag, or None
788
fingerprint: string (40 or 32 hexadecimal digits); used to
789
uniquely identify the client
790
host: string; available for use by the checker command
791
interval: datetime.timedelta(); How often to start a new checker
792
last_approval_request: datetime.datetime(); (UTC) or None
793
last_checked_ok: datetime.datetime(); (UTC) or None
794
last_checker_status: integer between 0 and 255 reflecting exit
795
status of last checker. -1 reflects crashed
796
checker, -2 means no checker completed yet.
797
last_checker_signal: The signal which killed the last checker, if
798
last_checker_status is -1
799
last_enabled: datetime.datetime(); (UTC) or None
800
name: string; from the config file, used in log messages and
802
secret: bytestring; sent verbatim (over TLS) to client
803
timeout: datetime.timedelta(); How long from last_checked_ok
804
until this client is disabled
805
extended_timeout: extra long timeout when secret has been sent
806
runtime_expansions: Allowed attributes for runtime expansion.
807
expires: datetime.datetime(); time (UTC) when a client will be
809
server_settings: The server_settings dict from main()
812
runtime_expansions = ("approval_delay", "approval_duration",
813
"created", "enabled", "expires",
814
"fingerprint", "host", "interval",
815
"last_approval_request", "last_checked_ok",
816
"last_enabled", "name", "timeout")
819
"extended_timeout": "PT15M",
821
"checker": "fping -q -- %%(host)s",
823
"approval_delay": "PT0S",
824
"approval_duration": "PT1S",
825
"approved_by_default": "True",
830
def config_parser(config):
831
"""Construct a new dict of client settings of this form:
832
{ client_name: {setting_name: value, ...}, ...}
833
with exceptions for any special settings as defined above.
834
NOTE: Must be a pure function. Must return the same result
835
value given the same arguments.
838
for client_name in config.sections():
839
section = dict(config.items(client_name))
840
client = settings[client_name] = {}
842
client["host"] = section["host"]
843
# Reformat values from string types to Python types
844
client["approved_by_default"] = config.getboolean(
845
client_name, "approved_by_default")
846
client["enabled"] = config.getboolean(client_name,
849
# Uppercase and remove spaces from fingerprint for later
850
# comparison purposes with return value from the
851
# fingerprint() function
852
client["fingerprint"] = (section["fingerprint"].upper()
854
if "secret" in section:
855
client["secret"] = codecs.decode(section["secret"]
858
elif "secfile" in section:
859
with open(os.path.expanduser(os.path.expandvars
860
(section["secfile"])),
862
client["secret"] = secfile.read()
864
raise TypeError("No secret or secfile for section {}"
866
client["timeout"] = string_to_delta(section["timeout"])
867
client["extended_timeout"] = string_to_delta(
868
section["extended_timeout"])
869
client["interval"] = string_to_delta(section["interval"])
870
client["approval_delay"] = string_to_delta(
871
section["approval_delay"])
872
client["approval_duration"] = string_to_delta(
873
section["approval_duration"])
874
client["checker_command"] = section["checker"]
875
client["last_approval_request"] = None
876
client["last_checked_ok"] = None
877
client["last_checker_status"] = -2
881
def __init__(self, settings, name = None, server_settings=None):
262
def _timedelta_to_milliseconds(td):
263
"Convert a datetime.timedelta() to milliseconds"
264
return ((td.days * 24 * 60 * 60 * 1000)
265
+ (td.seconds * 1000)
266
+ (td.microseconds // 1000))
268
def timeout_milliseconds(self):
269
"Return the 'timeout' attribute in milliseconds"
270
return self._timedelta_to_milliseconds(self.timeout)
272
def interval_milliseconds(self):
273
"Return the 'interval' attribute in milliseconds"
274
return self._timedelta_to_milliseconds(self.interval)
276
def __init__(self, name = None, disable_hook=None, config=None):
277
"""Note: the 'checker' key in 'config' sets the
278
'checker_command' attribute and *not* the 'checker'
883
if server_settings is None:
885
self.server_settings = server_settings
886
# adding all client settings
887
for setting, value in settings.items():
888
setattr(self, setting, value)
891
if not hasattr(self, "last_enabled"):
892
self.last_enabled = datetime.datetime.utcnow()
893
if not hasattr(self, "expires"):
894
self.expires = (datetime.datetime.utcnow()
283
logger.debug(u"Creating client %r", self.name)
284
# Uppercase and remove spaces from fingerprint for later
285
# comparison purposes with return value from the fingerprint()
287
self.fingerprint = (config[u"fingerprint"].upper()
289
logger.debug(u" Fingerprint: %s", self.fingerprint)
290
if u"secret" in config:
291
self.secret = config[u"secret"].decode(u"base64")
292
elif u"secfile" in config:
293
with closing(open(os.path.expanduser
295
(config[u"secfile"])),
297
self.secret = secfile.read()
897
self.last_enabled = None
900
logger.debug("Creating client %r", self.name)
901
logger.debug(" Fingerprint: %s", self.fingerprint)
902
self.created = settings.get("created",
903
datetime.datetime.utcnow())
905
# attributes specific for this server instance
299
raise TypeError(u"No secret or secfile for client %s"
301
self.host = config.get(u"host", u"")
302
self.created = datetime.datetime.utcnow()
304
self.last_enabled = None
305
self.last_checked_ok = None
306
self.timeout = string_to_delta(config[u"timeout"])
307
self.interval = string_to_delta(config[u"interval"])
308
self.disable_hook = disable_hook
906
309
self.checker = None
907
310
self.checker_initiator_tag = None
908
311
self.disable_initiator_tag = None
909
312
self.checker_callback_tag = None
313
self.checker_command = config[u"checker"]
910
314
self.current_checker_command = None
912
self.approvals_pending = 0
913
self.changedstate = multiprocessing_manager.Condition(
914
multiprocessing_manager.Lock())
915
self.client_structure = [attr
916
for attr in self.__dict__.keys()
917
if not attr.startswith("_")]
918
self.client_structure.append("client_structure")
920
for name, t in inspect.getmembers(
921
type(self), lambda obj: isinstance(obj, property)):
922
if not name.startswith("_"):
923
self.client_structure.append(name)
925
# Send notice to process children that client state has changed
926
def send_changedstate(self):
927
with self.changedstate:
928
self.changedstate.notify_all()
315
self.last_connect = None
930
317
def enable(self):
931
318
"""Start this client's checker and timeout hooks"""
932
if getattr(self, "enabled", False):
319
if getattr(self, u"enabled", False):
933
320
# Already enabled
935
self.expires = datetime.datetime.utcnow() + self.timeout
937
322
self.last_enabled = datetime.datetime.utcnow()
939
self.send_changedstate()
323
# Schedule a new checker to be started an 'interval' from now,
324
# and every interval from then on.
325
self.checker_initiator_tag = (gobject.timeout_add
326
(self.interval_milliseconds(),
328
# Schedule a disable() when 'timeout' has passed
329
self.disable_initiator_tag = (gobject.timeout_add
330
(self.timeout_milliseconds(),
333
# Also start a new checker *right now*.
941
336
def disable(self, quiet=True):
942
337
"""Disable this client."""
943
338
if not getattr(self, "enabled", False):
946
logger.info("Disabling client %s", self.name)
947
if getattr(self, "disable_initiator_tag", None) is not None:
948
GLib.source_remove(self.disable_initiator_tag)
341
logger.info(u"Disabling client %s", self.name)
342
if getattr(self, u"disable_initiator_tag", False):
343
gobject.source_remove(self.disable_initiator_tag)
949
344
self.disable_initiator_tag = None
951
if getattr(self, "checker_initiator_tag", None) is not None:
952
GLib.source_remove(self.checker_initiator_tag)
345
if getattr(self, u"checker_initiator_tag", False):
346
gobject.source_remove(self.checker_initiator_tag)
953
347
self.checker_initiator_tag = None
954
348
self.stop_checker()
349
if self.disable_hook:
350
self.disable_hook(self)
955
351
self.enabled = False
957
self.send_changedstate()
958
# Do not run this again if called by a GLib.timeout_add
352
# Do not run this again if called by a gobject.timeout_add
961
355
def __del__(self):
356
self.disable_hook = None
964
def init_checker(self):
965
# Schedule a new checker to be started an 'interval' from now,
966
# and every interval from then on.
967
if self.checker_initiator_tag is not None:
968
GLib.source_remove(self.checker_initiator_tag)
969
self.checker_initiator_tag = GLib.timeout_add(
970
int(self.interval.total_seconds() * 1000),
972
# Schedule a disable() when 'timeout' has passed
973
if self.disable_initiator_tag is not None:
974
GLib.source_remove(self.disable_initiator_tag)
975
self.disable_initiator_tag = GLib.timeout_add(
976
int(self.timeout.total_seconds() * 1000), self.disable)
977
# Also start a new checker *right now*.
980
def checker_callback(self, source, condition, connection,
359
def checker_callback(self, pid, condition, command):
982
360
"""The checker has completed, so take appropriate actions."""
983
361
self.checker_callback_tag = None
984
362
self.checker = None
985
# Read return code from connection (see call_pipe)
986
returncode = connection.recv()
990
self.last_checker_status = returncode
991
self.last_checker_signal = None
992
if self.last_checker_status == 0:
993
logger.info("Checker for %(name)s succeeded",
363
if os.WIFEXITED(condition):
364
exitstatus = os.WEXITSTATUS(condition)
366
logger.info(u"Checker for %(name)s succeeded",
995
368
self.checked_ok()
997
logger.info("Checker for %(name)s failed", vars(self))
370
logger.info(u"Checker for %(name)s failed",
999
self.last_checker_status = -1
1000
self.last_checker_signal = -returncode
1001
logger.warning("Checker for %(name)s crashed?",
373
logger.warning(u"Checker for %(name)s crashed?",
1005
376
def checked_ok(self):
1006
"""Assert that the client has been seen, alive and well."""
377
"""Bump up the timeout for this client.
379
This should only be called when the client has been seen,
1007
382
self.last_checked_ok = datetime.datetime.utcnow()
1008
self.last_checker_status = 0
1009
self.last_checker_signal = None
1012
def bump_timeout(self, timeout=None):
1013
"""Bump up the timeout for this client."""
1015
timeout = self.timeout
1016
if self.disable_initiator_tag is not None:
1017
GLib.source_remove(self.disable_initiator_tag)
1018
self.disable_initiator_tag = None
1019
if getattr(self, "enabled", False):
1020
self.disable_initiator_tag = GLib.timeout_add(
1021
int(timeout.total_seconds() * 1000), self.disable)
1022
self.expires = datetime.datetime.utcnow() + timeout
1024
def need_approval(self):
1025
self.last_approval_request = datetime.datetime.utcnow()
383
gobject.source_remove(self.disable_initiator_tag)
384
self.disable_initiator_tag = (gobject.timeout_add
385
(self.timeout_milliseconds(),
1027
388
def start_checker(self):
1028
389
"""Start a new checker subprocess if one is not running.
1030
391
If a checker already exists, leave it running and do
1032
393
# The reason for not killing a running checker is that if we
1033
# did that, and if a checker (for some reason) started running
1034
# slowly and taking more than 'interval' time, then the client
1035
# would inevitably timeout, since no checker would get a
1036
# chance to run to completion. If we instead leave running
394
# did that, then if a checker (for some reason) started
395
# running slowly and taking more than 'interval' time, the
396
# client would inevitably timeout, since no checker would get
397
# a chance to run to completion. If we instead leave running
1037
398
# checkers alone, the checker would have to take more time
1038
# than 'timeout' for the client to be disabled, which is as it
399
# than 'timeout' for the client to be declared invalid, which
400
# is as it should be.
1041
if self.checker is not None and not self.checker.is_alive():
1042
logger.warning("Checker was not alive; joining")
402
# If a checker exists, make sure it is not a zombie
404
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
405
except (AttributeError, OSError), error:
406
if (isinstance(error, OSError)
407
and error.errno != errno.ECHILD):
411
logger.warning(u"Checker was a zombie")
412
gobject.source_remove(self.checker_callback_tag)
413
self.checker_callback(pid, status,
414
self.current_checker_command)
1045
415
# Start a new checker if needed
1046
416
if self.checker is None:
1047
# Escape attributes for the shell
1049
attr: re.escape(str(getattr(self, attr)))
1050
for attr in self.runtime_expansions }
1052
command = self.checker_command % escaped_attrs
1053
except TypeError as error:
1054
logger.error('Could not format string "%s"',
1055
self.checker_command,
1057
return True # Try again later
418
# In case checker_command has exactly one % operator
419
command = self.checker_command % self.host
421
# Escape attributes for the shell
422
escaped_attrs = dict((key,
423
re.escape(unicode(str(val),
427
vars(self).iteritems())
429
command = self.checker_command % escaped_attrs
430
except TypeError, error:
431
logger.error(u'Could not format string "%s":'
432
u' %s', self.checker_command, error)
433
return True # Try again later
1058
434
self.current_checker_command = command
1059
logger.info("Starting checker %r for %s", command,
1061
# We don't need to redirect stdout and stderr, since
1062
# in normal mode, that is already done by daemon(),
1063
# and in debug mode we don't want to. (Stdin is
1064
# always replaced by /dev/null.)
1065
# The exception is when not debugging but nevertheless
1066
# running in the foreground; use the previously
1068
popen_args = { "close_fds": True,
1071
if (not self.server_settings["debug"]
1072
and self.server_settings["foreground"]):
1073
popen_args.update({"stdout": wnull,
1075
pipe = multiprocessing.Pipe(duplex = False)
1076
self.checker = multiprocessing.Process(
1078
args = (pipe[1], subprocess.call, command),
1079
kwargs = popen_args)
1080
self.checker.start()
1081
self.checker_callback_tag = GLib.io_add_watch(
1082
pipe[0].fileno(), GLib.IO_IN,
1083
self.checker_callback, pipe[0], command)
1084
# Re-run this periodically if run by GLib.timeout_add
436
logger.info(u"Starting checker %r for %s",
438
# We don't need to redirect stdout and stderr, since
439
# in normal mode, that is already done by daemon(),
440
# and in debug mode we don't want to. (Stdin is
441
# always replaced by /dev/null.)
442
self.checker = subprocess.Popen(command,
444
shell=True, cwd=u"/")
445
self.checker_callback_tag = (gobject.child_watch_add
447
self.checker_callback,
449
# The checker may have completed before the gobject
450
# watch was added. Check for this.
451
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
453
gobject.source_remove(self.checker_callback_tag)
454
self.checker_callback(pid, status, command)
455
except OSError, error:
456
logger.error(u"Failed to start subprocess: %s",
458
# Re-run this periodically if run by gobject.timeout_add
1087
461
def stop_checker(self):
1088
462
"""Force the checker process, if any, to stop."""
1089
463
if self.checker_callback_tag:
1090
GLib.source_remove(self.checker_callback_tag)
464
gobject.source_remove(self.checker_callback_tag)
1091
465
self.checker_callback_tag = None
1092
if getattr(self, "checker", None) is None:
466
if getattr(self, u"checker", None) is None:
1094
logger.debug("Stopping checker for %(name)s", vars(self))
1095
self.checker.terminate()
468
logger.debug(u"Stopping checker for %(name)s", vars(self))
470
os.kill(self.checker.pid, signal.SIGTERM)
472
#if self.checker.poll() is None:
473
# os.kill(self.checker.pid, signal.SIGKILL)
474
except OSError, error:
475
if error.errno != errno.ESRCH: # No such process
1096
477
self.checker = None
1099
def dbus_service_property(dbus_interface,
479
def still_valid(self):
480
"""Has the timeout not yet passed for this client?"""
481
if not getattr(self, u"enabled", False):
483
now = datetime.datetime.utcnow()
484
if self.last_checked_ok is None:
485
return now < (self.created + self.timeout)
487
return now < (self.last_checked_ok + self.timeout)
490
def dbus_service_property(dbus_interface, signature=u"v",
491
access=u"readwrite", byte_arrays=False):
1103
492
"""Decorators for marking methods of a DBusObjectWithProperties to
1104
493
become properties on the D-Bus.
1194
class DBusObjectWithAnnotations(dbus.service.Object):
1195
"""A D-Bus object with annotations.
1197
Classes inheriting from this can use the dbus_annotations
1198
decorator to add annotations to methods or signals.
1202
def _is_dbus_thing(thing):
1203
"""Returns a function testing if an attribute is a D-Bus thing
1205
If called like _is_dbus_thing("method") it returns a function
1206
suitable for use as predicate to inspect.getmembers().
1208
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1211
def _get_all_dbus_things(self, thing):
1212
"""Returns a generator of (name, attribute) pairs
1214
return ((getattr(athing.__get__(self), "_dbus_name", name),
1215
athing.__get__(self))
1216
for cls in self.__class__.__mro__
1218
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1220
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1221
out_signature = "s",
1222
path_keyword = 'object_path',
1223
connection_keyword = 'connection')
1224
def Introspect(self, object_path, connection):
1225
"""Overloading of standard D-Bus method.
1227
Inserts annotation tags on methods and signals.
1229
xmlstring = dbus.service.Object.Introspect(self, object_path,
1232
document = xml.dom.minidom.parseString(xmlstring)
1234
for if_tag in document.getElementsByTagName("interface"):
1235
# Add annotation tags
1236
for typ in ("method", "signal"):
1237
for tag in if_tag.getElementsByTagName(typ):
1239
for name, prop in (self.
1240
_get_all_dbus_things(typ)):
1241
if (name == tag.getAttribute("name")
1242
and prop._dbus_interface
1243
== if_tag.getAttribute("name")):
1244
annots.update(getattr(
1245
prop, "_dbus_annotations", {}))
1246
for name, value in annots.items():
1247
ann_tag = document.createElement(
1249
ann_tag.setAttribute("name", name)
1250
ann_tag.setAttribute("value", value)
1251
tag.appendChild(ann_tag)
1252
# Add interface annotation tags
1253
for annotation, value in dict(
1254
itertools.chain.from_iterable(
1255
annotations().items()
1256
for name, annotations
1257
in self._get_all_dbus_things("interface")
1258
if name == if_tag.getAttribute("name")
1260
ann_tag = document.createElement("annotation")
1261
ann_tag.setAttribute("name", annotation)
1262
ann_tag.setAttribute("value", value)
1263
if_tag.appendChild(ann_tag)
1264
# Fix argument name for the Introspect method itself
1265
if (if_tag.getAttribute("name")
1266
== dbus.INTROSPECTABLE_IFACE):
1267
for cn in if_tag.getElementsByTagName("method"):
1268
if cn.getAttribute("name") == "Introspect":
1269
for arg in cn.getElementsByTagName("arg"):
1270
if (arg.getAttribute("direction")
1272
arg.setAttribute("name",
1274
xmlstring = document.toxml("utf-8")
1276
except (AttributeError, xml.dom.DOMException,
1277
xml.parsers.expat.ExpatError) as error:
1278
logger.error("Failed to override Introspection method",
1283
class DBusObjectWithProperties(DBusObjectWithAnnotations):
534
class DBusObjectWithProperties(dbus.service.Object):
1284
535
"""A D-Bus object with properties.
1286
537
Classes inheriting from this can use the dbus_service_property
1287
538
decorator to expose methods as D-Bus properties. It exposes the
1288
539
standard Get(), Set(), and GetAll() methods on the D-Bus.
543
def _is_dbus_property(obj):
544
return getattr(obj, u"_dbus_is_property", False)
546
def _get_all_dbus_properties(self):
547
"""Returns a generator of (name, attribute) pairs
549
return ((prop._dbus_name, prop)
551
inspect.getmembers(self, self._is_dbus_property))
1291
553
def _get_dbus_property(self, interface_name, property_name):
1292
554
"""Returns a bound method if one exists which is a D-Bus
1293
555
property with the specified name and interface.
1295
for cls in self.__class__.__mro__:
1296
for name, value in inspect.getmembers(
1297
cls, self._is_dbus_thing("property")):
1298
if (value._dbus_name == property_name
1299
and value._dbus_interface == interface_name):
1300
return value.__get__(self)
557
for name in (property_name,
558
property_name + u"_dbus_property"):
559
prop = getattr(self, name, None)
561
or not self._is_dbus_property(prop)
562
or prop._dbus_name != property_name
563
or (interface_name and prop._dbus_interface
564
and interface_name != prop._dbus_interface)):
1302
567
# No such property
1303
raise DBusPropertyNotFound("{}:{}.{}".format(
1304
self.dbus_object_path, interface_name, property_name))
1307
def _get_all_interface_names(cls):
1308
"""Get a sequence of all interfaces supported by an object"""
1309
return (name for name in set(getattr(getattr(x, attr),
1310
"_dbus_interface", None)
1311
for x in (inspect.getmro(cls))
1313
if name is not None)
1315
@dbus.service.method(dbus.PROPERTIES_IFACE,
568
raise DBusPropertyNotFound(self.dbus_object_path + u":"
569
+ interface_name + u"."
572
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
1318
574
def Get(self, interface_name, property_name):
1319
575
"""Standard D-Bus property Get() method, see D-Bus standard.
1321
577
prop = self._get_dbus_property(interface_name, property_name)
1322
if prop._dbus_access == "write":
578
if prop._dbus_access == u"write":
1323
579
raise DBusPropertyAccessException(property_name)
1325
if not hasattr(value, "variant_level"):
581
if not hasattr(value, u"variant_level"):
1327
583
return type(value)(value, variant_level=value.variant_level+1)
1329
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
585
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
1330
586
def Set(self, interface_name, property_name, value):
1331
587
"""Standard D-Bus property Set() method, see D-Bus standard.
1333
589
prop = self._get_dbus_property(interface_name, property_name)
1334
if prop._dbus_access == "read":
590
if prop._dbus_access == u"read":
1335
591
raise DBusPropertyAccessException(property_name)
1336
if prop._dbus_get_args_options["byte_arrays"]:
1337
# The byte_arrays option is not supported yet on
1338
# signatures other than "ay".
1339
if prop._dbus_signature != "ay":
1340
raise ValueError("Byte arrays not supported for non-"
1341
"'ay' signature {!r}"
1342
.format(prop._dbus_signature))
1343
value = dbus.ByteArray(b''.join(chr(byte)
592
if prop._dbus_get_args_options[u"byte_arrays"]:
593
value = dbus.ByteArray(''.join(unichr(byte)
1347
@dbus.service.method(dbus.PROPERTIES_IFACE,
1349
out_signature="a{sv}")
597
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
598
out_signature=u"a{sv}")
1350
599
def GetAll(self, interface_name):
1351
600
"""Standard D-Bus property GetAll() method, see D-Bus
1354
603
Note: Will not include properties with access="write".
1357
for name, prop in self._get_all_dbus_things("property"):
606
for name, prop in self._get_all_dbus_properties():
1358
607
if (interface_name
1359
608
and interface_name != prop._dbus_interface):
1360
609
# Interface non-empty but did not match
1362
611
# Ignore write-only properties
1363
if prop._dbus_access == "write":
612
if prop._dbus_access == u"write":
1366
if not hasattr(value, "variant_level"):
1367
properties[name] = value
615
if not hasattr(value, u"variant_level"):
1369
properties[name] = type(value)(
1370
value, variant_level = value.variant_level + 1)
1371
return dbus.Dictionary(properties, signature="sv")
1373
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1374
def PropertiesChanged(self, interface_name, changed_properties,
1375
invalidated_properties):
1376
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
618
all[name] = type(value)(value, variant_level=
619
value.variant_level+1)
620
return dbus.Dictionary(all, signature=u"sv")
1381
622
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1383
624
path_keyword='object_path',
1384
625
connection_keyword='connection')
1385
626
def Introspect(self, object_path, connection):
1386
"""Overloading of standard D-Bus method.
1388
Inserts property tags and interface annotation tags.
627
"""Standard D-Bus method, overloaded to insert property tags.
1390
xmlstring = DBusObjectWithAnnotations.Introspect(self,
629
xmlstring = dbus.service.Object.Introspect(self, object_path,
1394
632
document = xml.dom.minidom.parseString(xmlstring)
1396
633
def make_tag(document, name, prop):
1397
e = document.createElement("property")
1398
e.setAttribute("name", name)
1399
e.setAttribute("type", prop._dbus_signature)
1400
e.setAttribute("access", prop._dbus_access)
634
e = document.createElement(u"property")
635
e.setAttribute(u"name", name)
636
e.setAttribute(u"type", prop._dbus_signature)
637
e.setAttribute(u"access", prop._dbus_access)
1403
for if_tag in document.getElementsByTagName("interface"):
639
for if_tag in document.getElementsByTagName(u"interface"):
1405
640
for tag in (make_tag(document, name, prop)
1407
in self._get_all_dbus_things("property")
642
in self._get_all_dbus_properties()
1408
643
if prop._dbus_interface
1409
== if_tag.getAttribute("name")):
644
== if_tag.getAttribute(u"name")):
1410
645
if_tag.appendChild(tag)
1411
# Add annotation tags for properties
1412
for tag in if_tag.getElementsByTagName("property"):
1414
for name, prop in self._get_all_dbus_things(
1416
if (name == tag.getAttribute("name")
1417
and prop._dbus_interface
1418
== if_tag.getAttribute("name")):
1419
annots.update(getattr(
1420
prop, "_dbus_annotations", {}))
1421
for name, value in annots.items():
1422
ann_tag = document.createElement(
1424
ann_tag.setAttribute("name", name)
1425
ann_tag.setAttribute("value", value)
1426
tag.appendChild(ann_tag)
1427
646
# Add the names to the return values for the
1428
647
# "org.freedesktop.DBus.Properties" methods
1429
if (if_tag.getAttribute("name")
1430
== "org.freedesktop.DBus.Properties"):
1431
for cn in if_tag.getElementsByTagName("method"):
1432
if cn.getAttribute("name") == "Get":
1433
for arg in cn.getElementsByTagName("arg"):
1434
if (arg.getAttribute("direction")
1436
arg.setAttribute("name", "value")
1437
elif cn.getAttribute("name") == "GetAll":
1438
for arg in cn.getElementsByTagName("arg"):
1439
if (arg.getAttribute("direction")
1441
arg.setAttribute("name", "props")
1442
xmlstring = document.toxml("utf-8")
1444
except (AttributeError, xml.dom.DOMException,
1445
xml.parsers.expat.ExpatError) as error:
1446
logger.error("Failed to override Introspection method",
1451
dbus.OBJECT_MANAGER_IFACE
1452
except AttributeError:
1453
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1455
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1456
"""A D-Bus object with an ObjectManager.
1458
Classes inheriting from this exposes the standard
1459
GetManagedObjects call and the InterfacesAdded and
1460
InterfacesRemoved signals on the standard
1461
"org.freedesktop.DBus.ObjectManager" interface.
1463
Note: No signals are sent automatically; they must be sent
1466
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1467
out_signature = "a{oa{sa{sv}}}")
1468
def GetManagedObjects(self):
1469
"""This function must be overridden"""
1470
raise NotImplementedError()
1472
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1473
signature = "oa{sa{sv}}")
1474
def InterfacesAdded(self, object_path, interfaces_and_properties):
1477
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1478
def InterfacesRemoved(self, object_path, interfaces):
1481
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1482
out_signature = "s",
1483
path_keyword = 'object_path',
1484
connection_keyword = 'connection')
1485
def Introspect(self, object_path, connection):
1486
"""Overloading of standard D-Bus method.
1488
Override return argument name of GetManagedObjects to be
1489
"objpath_interfaces_and_properties"
1491
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1495
document = xml.dom.minidom.parseString(xmlstring)
1497
for if_tag in document.getElementsByTagName("interface"):
1498
# Fix argument name for the GetManagedObjects method
1499
if (if_tag.getAttribute("name")
1500
== dbus.OBJECT_MANAGER_IFACE):
1501
for cn in if_tag.getElementsByTagName("method"):
1502
if (cn.getAttribute("name")
1503
== "GetManagedObjects"):
1504
for arg in cn.getElementsByTagName("arg"):
1505
if (arg.getAttribute("direction")
1509
"objpath_interfaces"
1511
xmlstring = document.toxml("utf-8")
1513
except (AttributeError, xml.dom.DOMException,
1514
xml.parsers.expat.ExpatError) as error:
1515
logger.error("Failed to override Introspection method",
1519
def datetime_to_dbus(dt, variant_level=0):
1520
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1522
return dbus.String("", variant_level = variant_level)
1523
return dbus.String(dt.isoformat(), variant_level=variant_level)
1526
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1527
"""A class decorator; applied to a subclass of
1528
dbus.service.Object, it will add alternate D-Bus attributes with
1529
interface names according to the "alt_interface_names" mapping.
1532
@alternate_dbus_interfaces({"org.example.Interface":
1533
"net.example.AlternateInterface"})
1534
class SampleDBusObject(dbus.service.Object):
1535
@dbus.service.method("org.example.Interface")
1536
def SampleDBusMethod():
1539
The above "SampleDBusMethod" on "SampleDBusObject" will be
1540
reachable via two interfaces: "org.example.Interface" and
1541
"net.example.AlternateInterface", the latter of which will have
1542
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1543
"true", unless "deprecate" is passed with a False value.
1545
This works for methods and signals, and also for D-Bus properties
1546
(from DBusObjectWithProperties) and interfaces (from the
1547
dbus_interface_annotations decorator).
1551
for orig_interface_name, alt_interface_name in (
1552
alt_interface_names.items()):
1554
interface_names = set()
1555
# Go though all attributes of the class
1556
for attrname, attribute in inspect.getmembers(cls):
1557
# Ignore non-D-Bus attributes, and D-Bus attributes
1558
# with the wrong interface name
1559
if (not hasattr(attribute, "_dbus_interface")
1560
or not attribute._dbus_interface.startswith(
1561
orig_interface_name)):
1563
# Create an alternate D-Bus interface name based on
1565
alt_interface = attribute._dbus_interface.replace(
1566
orig_interface_name, alt_interface_name)
1567
interface_names.add(alt_interface)
1568
# Is this a D-Bus signal?
1569
if getattr(attribute, "_dbus_is_signal", False):
1570
# Extract the original non-method undecorated
1571
# function by black magic
1572
if sys.version_info.major == 2:
1573
nonmethod_func = (dict(
1574
zip(attribute.func_code.co_freevars,
1575
attribute.__closure__))
1576
["func"].cell_contents)
1578
nonmethod_func = (dict(
1579
zip(attribute.__code__.co_freevars,
1580
attribute.__closure__))
1581
["func"].cell_contents)
1582
# Create a new, but exactly alike, function
1583
# object, and decorate it to be a new D-Bus signal
1584
# with the alternate D-Bus interface name
1585
new_function = copy_function(nonmethod_func)
1586
new_function = (dbus.service.signal(
1588
attribute._dbus_signature)(new_function))
1589
# Copy annotations, if any
1591
new_function._dbus_annotations = dict(
1592
attribute._dbus_annotations)
1593
except AttributeError:
1595
# Define a creator of a function to call both the
1596
# original and alternate functions, so both the
1597
# original and alternate signals gets sent when
1598
# the function is called
1599
def fixscope(func1, func2):
1600
"""This function is a scope container to pass
1601
func1 and func2 to the "call_both" function
1602
outside of its arguments"""
1604
@functools.wraps(func2)
1605
def call_both(*args, **kwargs):
1606
"""This function will emit two D-Bus
1607
signals by calling func1 and func2"""
1608
func1(*args, **kwargs)
1609
func2(*args, **kwargs)
1610
# Make wrapper function look like a D-Bus signal
1611
for name, attr in inspect.getmembers(func2):
1612
if name.startswith("_dbus_"):
1613
setattr(call_both, name, attr)
1616
# Create the "call_both" function and add it to
1618
attr[attrname] = fixscope(attribute, new_function)
1619
# Is this a D-Bus method?
1620
elif getattr(attribute, "_dbus_is_method", False):
1621
# Create a new, but exactly alike, function
1622
# object. Decorate it to be a new D-Bus method
1623
# with the alternate D-Bus interface name. Add it
1626
dbus.service.method(
1628
attribute._dbus_in_signature,
1629
attribute._dbus_out_signature)
1630
(copy_function(attribute)))
1631
# Copy annotations, if any
1633
attr[attrname]._dbus_annotations = dict(
1634
attribute._dbus_annotations)
1635
except AttributeError:
1637
# Is this a D-Bus property?
1638
elif getattr(attribute, "_dbus_is_property", False):
1639
# Create a new, but exactly alike, function
1640
# object, and decorate it to be a new D-Bus
1641
# property with the alternate D-Bus interface
1642
# name. Add it to the class.
1643
attr[attrname] = (dbus_service_property(
1644
alt_interface, attribute._dbus_signature,
1645
attribute._dbus_access,
1646
attribute._dbus_get_args_options
1648
(copy_function(attribute)))
1649
# Copy annotations, if any
1651
attr[attrname]._dbus_annotations = dict(
1652
attribute._dbus_annotations)
1653
except AttributeError:
1655
# Is this a D-Bus interface?
1656
elif getattr(attribute, "_dbus_is_interface", False):
1657
# Create a new, but exactly alike, function
1658
# object. Decorate it to be a new D-Bus interface
1659
# with the alternate D-Bus interface name. Add it
1662
dbus_interface_annotations(alt_interface)
1663
(copy_function(attribute)))
1665
# Deprecate all alternate interfaces
1666
iname="_AlternateDBusNames_interface_annotation{}"
1667
for interface_name in interface_names:
1669
@dbus_interface_annotations(interface_name)
1671
return { "org.freedesktop.DBus.Deprecated":
1673
# Find an unused name
1674
for aname in (iname.format(i)
1675
for i in itertools.count()):
1676
if aname not in attr:
1680
# Replace the class with a new subclass of it with
1681
# methods, signals, etc. as created above.
1682
if sys.version_info.major == 2:
1683
cls = type(b"{}Alternate".format(cls.__name__),
1686
cls = type("{}Alternate".format(cls.__name__),
1693
@alternate_dbus_interfaces({"se.recompile.Mandos":
1694
"se.bsnet.fukt.Mandos"})
648
if (if_tag.getAttribute(u"name")
649
== u"org.freedesktop.DBus.Properties"):
650
for cn in if_tag.getElementsByTagName(u"method"):
651
if cn.getAttribute(u"name") == u"Get":
652
for arg in cn.getElementsByTagName(u"arg"):
653
if (arg.getAttribute(u"direction")
655
arg.setAttribute(u"name", u"value")
656
elif cn.getAttribute(u"name") == u"GetAll":
657
for arg in cn.getElementsByTagName(u"arg"):
658
if (arg.getAttribute(u"direction")
660
arg.setAttribute(u"name", u"props")
661
xmlstring = document.toxml(u"utf-8")
663
except (AttributeError, xml.dom.DOMException,
664
xml.parsers.expat.ExpatError), error:
665
logger.error(u"Failed to override Introspection method",
1695
670
class ClientDBus(Client, DBusObjectWithProperties):
1696
671
"""A Client class using D-Bus
1712
681
Client.__init__(self, *args, **kwargs)
1713
682
# Only now, when this client is initialized, can it show up on
1715
client_object_name = str(self.name).translate(
1716
{ord("."): ord("_"),
1717
ord("-"): ord("_")})
1718
self.dbus_object_path = dbus.ObjectPath(
1719
"/clients/" + client_object_name)
684
self.dbus_object_path = (dbus.ObjectPath
686
+ self.name.replace(u".", u"_")))
1720
687
DBusObjectWithProperties.__init__(self, self.bus,
1721
688
self.dbus_object_path)
1723
def notifychangeproperty(transform_func, dbus_name,
1724
type_func=lambda x: x,
1726
invalidate_only=False,
1727
_interface=_interface):
1728
""" Modify a variable so that it's a property which announces
1729
its changes to DBus.
1731
transform_fun: Function that takes a value and a variant_level
1732
and transforms it to a D-Bus type.
1733
dbus_name: D-Bus name of the variable
1734
type_func: Function that transform the value before sending it
1735
to the D-Bus. Default: no transform
1736
variant_level: D-Bus variant level. Default: 1
1738
attrname = "_{}".format(dbus_name)
1740
def setter(self, value):
1741
if hasattr(self, "dbus_object_path"):
1742
if (not hasattr(self, attrname) or
1743
type_func(getattr(self, attrname, None))
1744
!= type_func(value)):
1746
self.PropertiesChanged(
1747
_interface, dbus.Dictionary(),
1748
dbus.Array((dbus_name, )))
1750
dbus_value = transform_func(
1752
variant_level = variant_level)
1753
self.PropertyChanged(dbus.String(dbus_name),
1755
self.PropertiesChanged(
1757
dbus.Dictionary({ dbus.String(dbus_name):
1760
setattr(self, attrname, value)
1762
return property(lambda self: getattr(self, attrname), setter)
1764
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1765
approvals_pending = notifychangeproperty(dbus.Boolean,
1768
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1769
last_enabled = notifychangeproperty(datetime_to_dbus,
1771
checker = notifychangeproperty(
1772
dbus.Boolean, "CheckerRunning",
1773
type_func = lambda checker: checker is not None)
1774
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1776
last_checker_status = notifychangeproperty(dbus.Int16,
1777
"LastCheckerStatus")
1778
last_approval_request = notifychangeproperty(
1779
datetime_to_dbus, "LastApprovalRequest")
1780
approved_by_default = notifychangeproperty(dbus.Boolean,
1781
"ApprovedByDefault")
1782
approval_delay = notifychangeproperty(
1783
dbus.UInt64, "ApprovalDelay",
1784
type_func = lambda td: td.total_seconds() * 1000)
1785
approval_duration = notifychangeproperty(
1786
dbus.UInt64, "ApprovalDuration",
1787
type_func = lambda td: td.total_seconds() * 1000)
1788
host = notifychangeproperty(dbus.String, "Host")
1789
timeout = notifychangeproperty(
1790
dbus.UInt64, "Timeout",
1791
type_func = lambda td: td.total_seconds() * 1000)
1792
extended_timeout = notifychangeproperty(
1793
dbus.UInt64, "ExtendedTimeout",
1794
type_func = lambda td: td.total_seconds() * 1000)
1795
interval = notifychangeproperty(
1796
dbus.UInt64, "Interval",
1797
type_func = lambda td: td.total_seconds() * 1000)
1798
checker_command = notifychangeproperty(dbus.String, "Checker")
1799
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1800
invalidate_only=True)
1802
del notifychangeproperty
691
def _datetime_to_dbus(dt, variant_level=0):
692
"""Convert a UTC datetime.datetime() to a D-Bus type."""
693
return dbus.String(dt.isoformat(),
694
variant_level=variant_level)
697
oldstate = getattr(self, u"enabled", False)
698
r = Client.enable(self)
699
if oldstate != self.enabled:
701
self.PropertyChanged(dbus.String(u"enabled"),
702
dbus.Boolean(True, variant_level=1))
703
self.PropertyChanged(
704
dbus.String(u"last_enabled"),
705
self._datetime_to_dbus(self.last_enabled,
709
def disable(self, quiet = False):
710
oldstate = getattr(self, u"enabled", False)
711
r = Client.disable(self, quiet=quiet)
712
if not quiet and oldstate != self.enabled:
714
self.PropertyChanged(dbus.String(u"enabled"),
715
dbus.Boolean(False, variant_level=1))
1804
718
def __del__(self, *args, **kwargs):
1806
720
self.remove_from_connection()
1807
721
except LookupError:
1809
if hasattr(DBusObjectWithProperties, "__del__"):
723
if hasattr(DBusObjectWithProperties, u"__del__"):
1810
724
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1811
725
Client.__del__(self, *args, **kwargs)
1813
def checker_callback(self, source, condition,
1814
connection, command, *args, **kwargs):
1815
ret = Client.checker_callback(self, source, condition,
1816
connection, command, *args,
1818
exitstatus = self.last_checker_status
727
def checker_callback(self, pid, condition, command,
729
self.checker_callback_tag = None
732
self.PropertyChanged(dbus.String(u"checker_running"),
733
dbus.Boolean(False, variant_level=1))
734
if os.WIFEXITED(condition):
735
exitstatus = os.WEXITSTATUS(condition)
1820
736
# Emit D-Bus signal
1821
737
self.CheckerCompleted(dbus.Int16(exitstatus),
1822
# This is specific to GNU libC
1823
dbus.Int64(exitstatus << 8),
738
dbus.Int64(condition),
1824
739
dbus.String(command))
1826
741
# Emit D-Bus signal
1827
742
self.CheckerCompleted(dbus.Int16(-1),
1829
# This is specific to GNU libC
1831
| self.last_checker_signal),
743
dbus.Int64(condition),
1832
744
dbus.String(command))
746
return Client.checker_callback(self, pid, condition, command,
749
def checked_ok(self, *args, **kwargs):
750
r = Client.checked_ok(self, *args, **kwargs)
752
self.PropertyChanged(
753
dbus.String(u"last_checked_ok"),
754
(self._datetime_to_dbus(self.last_checked_ok,
1835
758
def start_checker(self, *args, **kwargs):
1836
old_checker_pid = getattr(self.checker, "pid", None)
759
old_checker = self.checker
760
if self.checker is not None:
761
old_checker_pid = self.checker.pid
763
old_checker_pid = None
1837
764
r = Client.start_checker(self, *args, **kwargs)
1838
765
# Only if new checker process was started
1839
766
if (self.checker is not None
1840
767
and old_checker_pid != self.checker.pid):
1841
768
# Emit D-Bus signal
1842
769
self.CheckerStarted(self.current_checker_command)
1845
def _reset_approved(self):
1846
self.approved = None
1849
def approve(self, value=True):
1850
self.approved = value
1851
GLib.timeout_add(int(self.approval_duration.total_seconds()
1852
* 1000), self._reset_approved)
1853
self.send_changedstate()
1855
## D-Bus methods, signals & properties
770
self.PropertyChanged(
771
dbus.String(u"checker_running"),
772
dbus.Boolean(True, variant_level=1))
775
def stop_checker(self, *args, **kwargs):
776
old_checker = getattr(self, u"checker", None)
777
r = Client.stop_checker(self, *args, **kwargs)
778
if (old_checker is not None
779
and getattr(self, u"checker", None) is None):
780
self.PropertyChanged(dbus.String(u"checker_running"),
781
dbus.Boolean(False, variant_level=1))
784
## D-Bus methods & signals
785
_interface = u"se.bsnet.fukt.Mandos.Client"
788
@dbus.service.method(_interface)
790
return self.checked_ok()
1861
792
# CheckerCompleted - signal
1862
@dbus.service.signal(_interface, signature="nxs")
793
@dbus.service.signal(_interface, signature=u"nxs")
1863
794
def CheckerCompleted(self, exitcode, waitstatus, command):
1867
798
# CheckerStarted - signal
1868
@dbus.service.signal(_interface, signature="s")
799
@dbus.service.signal(_interface, signature=u"s")
1869
800
def CheckerStarted(self, command):
1873
804
# PropertyChanged - signal
1874
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1875
@dbus.service.signal(_interface, signature="sv")
805
@dbus.service.signal(_interface, signature=u"sv")
1876
806
def PropertyChanged(self, property, value):
2175
988
Note: This will run in its own forked process."""
2177
990
def handle(self):
2178
with contextlib.closing(self.server.child_pipe) as child_pipe:
2179
logger.info("TCP connection from: %s",
2180
str(self.client_address))
2181
logger.debug("Pipe FD: %d",
2182
self.server.child_pipe.fileno())
2184
session = gnutls.ClientSession(self.request)
2186
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
2187
# "+AES-256-CBC", "+SHA1",
2188
# "+COMP-NULL", "+CTYPE-OPENPGP",
991
logger.info(u"TCP connection from: %s",
992
unicode(self.client_address))
993
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
994
# Open IPC pipe to parent process
995
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
996
session = (gnutls.connection
997
.ClientSession(self.request,
1001
line = self.request.makefile().readline()
1002
logger.debug(u"Protocol version: %r", line)
1004
if int(line.strip().split()[0]) > 1:
1006
except (ValueError, IndexError, RuntimeError), error:
1007
logger.error(u"Unknown protocol version: %s", error)
1010
# Note: gnutls.connection.X509Credentials is really a
1011
# generic GnuTLS certificate credentials object so long as
1012
# no X.509 keys are added to it. Therefore, we can use it
1013
# here despite using OpenPGP certificates.
1015
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1016
# u"+AES-256-CBC", u"+SHA1",
1017
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
2190
1019
# Use a fallback default, since this MUST be set.
2191
1020
priority = self.server.gnutls_priority
2192
1021
if priority is None:
2194
gnutls.priority_set_direct(session._c_object,
2195
priority.encode("utf-8"),
2198
# Start communication using the Mandos protocol
2199
# Get protocol number
2200
line = self.request.makefile().readline()
2201
logger.debug("Protocol version: %r", line)
2203
if int(line.strip().split()[0]) > 1:
2204
raise RuntimeError(line)
2205
except (ValueError, IndexError, RuntimeError) as error:
2206
logger.error("Unknown protocol version: %s", error)
2209
# Start GnuTLS connection
1022
priority = u"NORMAL"
1023
(gnutls.library.functions
1024
.gnutls_priority_set_direct(session._c_object,
2211
1028
session.handshake()
2212
except gnutls.Error as error:
2213
logger.warning("Handshake failed: %s", error)
1029
except gnutls.errors.GNUTLSError, error:
1030
logger.warning(u"Handshake failed: %s", error)
2214
1031
# Do not run session.bye() here: the session is not
2215
1032
# established. Just abandon the request.
2217
logger.debug("Handshake succeeded")
2219
approval_required = False
1034
logger.debug(u"Handshake succeeded")
2222
fpr = self.fingerprint(
2223
self.peer_certificate(session))
2224
except (TypeError, gnutls.Error) as error:
2225
logger.warning("Bad certificate: %s", error)
2227
logger.debug("Fingerprint: %s", fpr)
2230
client = ProxyClient(child_pipe, fpr,
2231
self.client_address)
2235
if client.approval_delay:
2236
delay = client.approval_delay
2237
client.approvals_pending += 1
2238
approval_required = True
2241
if not client.enabled:
2242
logger.info("Client %s is disabled",
2244
if self.server.use_dbus:
2246
client.Rejected("Disabled")
2249
if client.approved or not client.approval_delay:
2250
#We are approved or approval is disabled
2252
elif client.approved is None:
2253
logger.info("Client %s needs approval",
2255
if self.server.use_dbus:
2257
client.NeedApproval(
2258
client.approval_delay.total_seconds()
2259
* 1000, client.approved_by_default)
2261
logger.warning("Client %s was not approved",
2263
if self.server.use_dbus:
2265
client.Rejected("Denied")
2268
#wait until timeout or approved
2269
time = datetime.datetime.now()
2270
client.changedstate.acquire()
2271
client.changedstate.wait(delay.total_seconds())
2272
client.changedstate.release()
2273
time2 = datetime.datetime.now()
2274
if (time2 - time) >= delay:
2275
if not client.approved_by_default:
2276
logger.warning("Client %s timed out while"
2277
" waiting for approval",
2279
if self.server.use_dbus:
2281
client.Rejected("Approval timed out")
2286
delay -= time2 - time
2289
session.send(client.secret)
2290
except gnutls.Error as error:
2291
logger.warning("gnutls send failed",
2295
logger.info("Sending secret to %s", client.name)
2296
# bump the timeout using extended_timeout
2297
client.bump_timeout(client.extended_timeout)
2298
if self.server.use_dbus:
1036
fpr = self.fingerprint(self.peer_certificate(session))
1037
except (TypeError, gnutls.errors.GNUTLSError), error:
1038
logger.warning(u"Bad certificate: %s", error)
1041
logger.debug(u"Fingerprint: %s", fpr)
2303
if approval_required:
2304
client.approvals_pending -= 1
2307
except gnutls.Error as error:
2308
logger.warning("GnuTLS bye failed",
1043
for c in self.server.clients:
1044
if c.fingerprint == fpr:
1048
ipc.write(u"NOTFOUND %s %s\n"
1049
% (fpr, unicode(self.client_address)))
1052
# Have to check if client.still_valid(), since it is
1053
# possible that the client timed out while establishing
1054
# the GnuTLS session.
1055
if not client.still_valid():
1056
ipc.write(u"INVALID %s\n" % client.name)
1059
ipc.write(u"SENDING %s\n" % client.name)
1061
while sent_size < len(client.secret):
1062
sent = session.send(client.secret[sent_size:])
1063
logger.debug(u"Sent: %d, remaining: %d",
1064
sent, len(client.secret)
1065
- (sent_size + sent))
2312
1070
def peer_certificate(session):
2313
1071
"Return the peer's OpenPGP certificate as a bytestring"
2314
1072
# If not an OpenPGP certificate...
2315
if (gnutls.certificate_type_get(session._c_object)
2316
!= gnutls.CRT_OPENPGP):
2317
# ...return invalid data
1073
if (gnutls.library.functions
1074
.gnutls_certificate_type_get(session._c_object)
1075
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1076
# ...do the normal thing
1077
return session.peer_certificate
2319
1078
list_size = ctypes.c_uint(1)
2320
cert_list = (gnutls.certificate_get_peers
1079
cert_list = (gnutls.library.functions
1080
.gnutls_certificate_get_peers
2321
1081
(session._c_object, ctypes.byref(list_size)))
2322
1082
if not bool(cert_list) and list_size.value != 0:
2323
raise gnutls.Error("error getting peer certificate")
1083
raise gnutls.errors.GNUTLSError(u"error getting peer"
2324
1085
if list_size.value == 0:
2326
1087
cert = cert_list[0]
2504
1218
gnutls_priority GnuTLS priority string
2505
1219
use_dbus: Boolean; to emit D-Bus signals or not
2507
Assumes a GLib.MainLoop event loop.
1221
Assumes a gobject.MainLoop event loop.
2510
1223
def __init__(self, server_address, RequestHandlerClass,
2514
gnutls_priority=None,
1224
interface=None, use_ipv6=True, clients=None,
1225
gnutls_priority=None, use_dbus=True):
2517
1226
self.enabled = False
2518
1227
self.clients = clients
2519
1228
if self.clients is None:
1229
self.clients = set()
2521
1230
self.use_dbus = use_dbus
2522
1231
self.gnutls_priority = gnutls_priority
2523
1232
IPv6_TCPServer.__init__(self, server_address,
2524
1233
RequestHandlerClass,
2525
1234
interface = interface,
2526
use_ipv6 = use_ipv6,
2527
socketfd = socketfd)
1235
use_ipv6 = use_ipv6)
2529
1236
def server_activate(self):
2530
1237
if self.enabled:
2531
1238
return socketserver.TCPServer.server_activate(self)
2533
1239
def enable(self):
2534
1240
self.enabled = True
2536
def add_pipe(self, parent_pipe, proc):
1241
def add_pipe(self, pipe):
2537
1242
# Call "handle_ipc" for both data and EOF events
2539
parent_pipe.fileno(),
2540
GLib.IO_IN | GLib.IO_HUP,
2541
functools.partial(self.handle_ipc,
2542
parent_pipe = parent_pipe,
2545
def handle_ipc(self, source, condition,
2548
client_object=None):
2549
# error, or the other end of multiprocessing.Pipe has closed
2550
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2551
# Wait for other process to exit
2555
# Read a request from the child
2556
request = parent_pipe.recv()
2557
command = request[0]
2559
if command == 'init':
2561
address = request[2]
2563
for c in self.clients.values():
2564
if c.fingerprint == fpr:
2568
logger.info("Client not found for fingerprint: %s, ad"
2569
"dress: %s", fpr, address)
2572
mandos_dbus_service.ClientNotFound(fpr,
2574
parent_pipe.send(False)
2578
parent_pipe.fileno(),
2579
GLib.IO_IN | GLib.IO_HUP,
2580
functools.partial(self.handle_ipc,
2581
parent_pipe = parent_pipe,
2583
client_object = client))
2584
parent_pipe.send(True)
2585
# remove the old hook in favor of the new above hook on
2588
if command == 'funcall':
2589
funcname = request[1]
2593
parent_pipe.send(('data', getattr(client_object,
2597
if command == 'getattr':
2598
attrname = request[1]
2599
if isinstance(client_object.__getattribute__(attrname),
2600
collections.Callable):
2601
parent_pipe.send(('function', ))
2604
'data', client_object.__getattribute__(attrname)))
2606
if command == 'setattr':
2607
attrname = request[1]
2609
setattr(client_object, attrname, value)
1243
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1245
def handle_ipc(self, source, condition, file_objects={}):
1247
gobject.IO_IN: u"IN", # There is data to read.
1248
gobject.IO_OUT: u"OUT", # Data can be written (without
1250
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1251
gobject.IO_ERR: u"ERR", # Error condition.
1252
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1253
# broken, usually for pipes and
1256
conditions_string = ' | '.join(name
1258
condition_names.iteritems()
1259
if cond & condition)
1260
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1263
# Turn the pipe file descriptor into a Python file object
1264
if source not in file_objects:
1265
file_objects[source] = os.fdopen(source, u"r", 1)
1267
# Read a line from the file object
1268
cmdline = file_objects[source].readline()
1269
if not cmdline: # Empty line means end of file
1270
# close the IPC pipe
1271
file_objects[source].close()
1272
del file_objects[source]
1274
# Stop calling this function
1277
logger.debug(u"IPC command: %r", cmdline)
1279
# Parse and act on command
1280
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1282
if cmd == u"NOTFOUND":
1283
fpr, address = args.split(None, 1)
1284
logger.warning(u"Client not found for fingerprint: %s, ad"
1285
u"dress: %s", fpr, address)
1288
mandos_dbus_service.ClientNotFound(fpr, address)
1289
elif cmd == u"INVALID":
1290
for client in self.clients:
1291
if client.name == args:
1292
logger.warning(u"Client %s is invalid", args)
1298
logger.error(u"Unknown client %s is invalid", args)
1299
elif cmd == u"SENDING":
1300
for client in self.clients:
1301
if client.name == args:
1302
logger.info(u"Sending secret to %s", client.name)
1309
logger.error(u"Sending secret to unknown client %s",
1312
logger.error(u"Unknown IPC command: %r", cmdline)
1314
# Keep calling this function
2614
def rfc3339_duration_to_delta(duration):
2615
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2617
>>> rfc3339_duration_to_delta("P7D")
2618
datetime.timedelta(7)
2619
>>> rfc3339_duration_to_delta("PT60S")
2620
datetime.timedelta(0, 60)
2621
>>> rfc3339_duration_to_delta("PT60M")
2622
datetime.timedelta(0, 3600)
2623
>>> rfc3339_duration_to_delta("PT24H")
2624
datetime.timedelta(1)
2625
>>> rfc3339_duration_to_delta("P1W")
2626
datetime.timedelta(7)
2627
>>> rfc3339_duration_to_delta("PT5M30S")
2628
datetime.timedelta(0, 330)
2629
>>> rfc3339_duration_to_delta("P1DT3M20S")
2630
datetime.timedelta(1, 200)
2633
# Parsing an RFC 3339 duration with regular expressions is not
2634
# possible - there would have to be multiple places for the same
2635
# values, like seconds. The current code, while more esoteric, is
2636
# cleaner without depending on a parsing library. If Python had a
2637
# built-in library for parsing we would use it, but we'd like to
2638
# avoid excessive use of external libraries.
2640
# New type for defining tokens, syntax, and semantics all-in-one
2641
Token = collections.namedtuple("Token", (
2642
"regexp", # To match token; if "value" is not None, must have
2643
# a "group" containing digits
2644
"value", # datetime.timedelta or None
2645
"followers")) # Tokens valid after this token
2646
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2647
# the "duration" ABNF definition in RFC 3339, Appendix A.
2648
token_end = Token(re.compile(r"$"), None, frozenset())
2649
token_second = Token(re.compile(r"(\d+)S"),
2650
datetime.timedelta(seconds=1),
2651
frozenset((token_end, )))
2652
token_minute = Token(re.compile(r"(\d+)M"),
2653
datetime.timedelta(minutes=1),
2654
frozenset((token_second, token_end)))
2655
token_hour = Token(re.compile(r"(\d+)H"),
2656
datetime.timedelta(hours=1),
2657
frozenset((token_minute, token_end)))
2658
token_time = Token(re.compile(r"T"),
2660
frozenset((token_hour, token_minute,
2662
token_day = Token(re.compile(r"(\d+)D"),
2663
datetime.timedelta(days=1),
2664
frozenset((token_time, token_end)))
2665
token_month = Token(re.compile(r"(\d+)M"),
2666
datetime.timedelta(weeks=4),
2667
frozenset((token_day, token_end)))
2668
token_year = Token(re.compile(r"(\d+)Y"),
2669
datetime.timedelta(weeks=52),
2670
frozenset((token_month, token_end)))
2671
token_week = Token(re.compile(r"(\d+)W"),
2672
datetime.timedelta(weeks=1),
2673
frozenset((token_end, )))
2674
token_duration = Token(re.compile(r"P"), None,
2675
frozenset((token_year, token_month,
2676
token_day, token_time,
2678
# Define starting values
2679
value = datetime.timedelta() # Value so far
2681
followers = frozenset((token_duration, )) # Following valid tokens
2682
s = duration # String left to parse
2683
# Loop until end token is found
2684
while found_token is not token_end:
2685
# Search for any currently valid tokens
2686
for token in followers:
2687
match = token.regexp.match(s)
2688
if match is not None:
2690
if token.value is not None:
2691
# Value found, parse digits
2692
factor = int(match.group(1), 10)
2693
# Add to value so far
2694
value += factor * token.value
2695
# Strip token from string
2696
s = token.regexp.sub("", s, 1)
2699
# Set valid next tokens
2700
followers = found_token.followers
2703
# No currently valid tokens were found
2704
raise ValueError("Invalid RFC 3339 duration: {!r}"
2710
1318
def string_to_delta(interval):
2711
1319
"""Parse a string and return a datetime.timedelta
2713
>>> string_to_delta('7d')
1321
>>> string_to_delta(u'7d')
2714
1322
datetime.timedelta(7)
2715
>>> string_to_delta('60s')
1323
>>> string_to_delta(u'60s')
2716
1324
datetime.timedelta(0, 60)
2717
>>> string_to_delta('60m')
1325
>>> string_to_delta(u'60m')
2718
1326
datetime.timedelta(0, 3600)
2719
>>> string_to_delta('24h')
1327
>>> string_to_delta(u'24h')
2720
1328
datetime.timedelta(1)
2721
>>> string_to_delta('1w')
1329
>>> string_to_delta(u'1w')
2722
1330
datetime.timedelta(7)
2723
>>> string_to_delta('5m 30s')
1331
>>> string_to_delta(u'5m 30s')
2724
1332
datetime.timedelta(0, 330)
2728
return rfc3339_duration_to_delta(interval)
2732
1334
timevalue = datetime.timedelta(0)
2733
1335
for s in interval.split():
1337
suffix = unicode(s[-1])
2736
1338
value = int(s[:-1])
2738
1340
delta = datetime.timedelta(value)
1341
elif suffix == u"s":
2740
1342
delta = datetime.timedelta(0, value)
1343
elif suffix == u"m":
2742
1344
delta = datetime.timedelta(0, 0, 0, 0, value)
1345
elif suffix == u"h":
2744
1346
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1347
elif suffix == u"w":
2746
1348
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2748
raise ValueError("Unknown suffix {!r}".format(suffix))
2749
except IndexError as e:
2750
raise ValueError(*(e.args))
1350
raise ValueError(u"Unknown suffix %r" % suffix)
1351
except (ValueError, IndexError), e:
1352
raise ValueError(e.message)
2751
1353
timevalue += delta
2752
1354
return timevalue
1357
def if_nametoindex(interface):
1358
"""Call the C function if_nametoindex(), or equivalent
1360
Note: This function cannot accept a unicode string."""
1361
global if_nametoindex
1363
if_nametoindex = (ctypes.cdll.LoadLibrary
1364
(ctypes.util.find_library(u"c"))
1366
except (OSError, AttributeError):
1367
logger.warning(u"Doing if_nametoindex the hard way")
1368
def if_nametoindex(interface):
1369
"Get an interface index the hard way, i.e. using fcntl()"
1370
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1371
with closing(socket.socket()) as s:
1372
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1373
struct.pack(str(u"16s16x"),
1375
interface_index = struct.unpack(str(u"I"),
1377
return interface_index
1378
return if_nametoindex(interface)
2755
1381
def daemon(nochdir = False, noclose = False):
2756
1382
"""See daemon(3). Standard BSD Unix function.
2782
1408
##################################################################
2783
1409
# Parsing of options, both command line and config file
2785
parser = argparse.ArgumentParser()
2786
parser.add_argument("-v", "--version", action="version",
2787
version = "%(prog)s {}".format(version),
2788
help="show version number and exit")
2789
parser.add_argument("-i", "--interface", metavar="IF",
2790
help="Bind to interface IF")
2791
parser.add_argument("-a", "--address",
2792
help="Address to listen for requests on")
2793
parser.add_argument("-p", "--port", type=int,
2794
help="Port number to receive requests on")
2795
parser.add_argument("--check", action="store_true",
2796
help="Run self-test")
2797
parser.add_argument("--debug", action="store_true",
2798
help="Debug mode; run in foreground and log"
2799
" to terminal", default=None)
2800
parser.add_argument("--debuglevel", metavar="LEVEL",
2801
help="Debug level for stdout output")
2802
parser.add_argument("--priority", help="GnuTLS"
2803
" priority string (see GnuTLS documentation)")
2804
parser.add_argument("--servicename",
2805
metavar="NAME", help="Zeroconf service name")
2806
parser.add_argument("--configdir",
2807
default="/etc/mandos", metavar="DIR",
2808
help="Directory to search for configuration"
2810
parser.add_argument("--no-dbus", action="store_false",
2811
dest="use_dbus", help="Do not provide D-Bus"
2812
" system bus interface", default=None)
2813
parser.add_argument("--no-ipv6", action="store_false",
2814
dest="use_ipv6", help="Do not use IPv6",
2816
parser.add_argument("--no-restore", action="store_false",
2817
dest="restore", help="Do not restore stored"
2818
" state", default=None)
2819
parser.add_argument("--socket", type=int,
2820
help="Specify a file descriptor to a network"
2821
" socket to use instead of creating one")
2822
parser.add_argument("--statedir", metavar="DIR",
2823
help="Directory to save/restore state in")
2824
parser.add_argument("--foreground", action="store_true",
2825
help="Run in foreground", default=None)
2826
parser.add_argument("--no-zeroconf", action="store_false",
2827
dest="zeroconf", help="Do not use Zeroconf",
2830
options = parser.parse_args()
1411
parser = optparse.OptionParser(version = "%%prog %s" % version)
1412
parser.add_option("-i", u"--interface", type=u"string",
1413
metavar="IF", help=u"Bind to interface IF")
1414
parser.add_option("-a", u"--address", type=u"string",
1415
help=u"Address to listen for requests on")
1416
parser.add_option("-p", u"--port", type=u"int",
1417
help=u"Port number to receive requests on")
1418
parser.add_option("--check", action=u"store_true",
1419
help=u"Run self-test")
1420
parser.add_option("--debug", action=u"store_true",
1421
help=u"Debug mode; run in foreground and log to"
1423
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1424
u" priority string (see GnuTLS documentation)")
1425
parser.add_option("--servicename", type=u"string",
1426
metavar=u"NAME", help=u"Zeroconf service name")
1427
parser.add_option("--configdir", type=u"string",
1428
default=u"/etc/mandos", metavar=u"DIR",
1429
help=u"Directory to search for configuration"
1431
parser.add_option("--no-dbus", action=u"store_false",
1432
dest=u"use_dbus", help=u"Do not provide D-Bus"
1433
u" system bus interface")
1434
parser.add_option("--no-ipv6", action=u"store_false",
1435
dest=u"use_ipv6", help=u"Do not use IPv6")
1436
options = parser.parse_args()[0]
2832
1438
if options.check:
2834
fail_count, test_count = doctest.testmod()
2835
sys.exit(os.EX_OK if fail_count == 0 else 1)
2837
1443
# Default values for config file for server-global settings
2838
server_defaults = { "interface": "",
2843
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2844
":+SIGN-DSA-SHA256",
2845
"servicename": "Mandos",
2851
"statedir": "/var/lib/mandos",
2852
"foreground": "False",
1444
server_defaults = { u"interface": u"",
1449
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1450
u"servicename": u"Mandos",
1451
u"use_dbus": u"True",
1452
u"use_ipv6": u"True",
2856
1455
# Parse config file for server-global settings
2857
1456
server_config = configparser.SafeConfigParser(server_defaults)
2858
1457
del server_defaults
2859
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1458
server_config.read(os.path.join(options.configdir,
2860
1460
# Convert the SafeConfigParser object to a dict
2861
1461
server_settings = server_config.defaults()
2862
1462
# Use the appropriate methods on the non-string config options
2863
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2864
server_settings[option] = server_config.getboolean("DEFAULT",
1463
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1464
server_settings[option] = server_config.getboolean(u"DEFAULT",
2866
1466
if server_settings["port"]:
2867
server_settings["port"] = server_config.getint("DEFAULT",
2869
if server_settings["socket"]:
2870
server_settings["socket"] = server_config.getint("DEFAULT",
2872
# Later, stdin will, and stdout and stderr might, be dup'ed
2873
# over with an opened os.devnull. But we don't want this to
2874
# happen with a supplied network socket.
2875
if 0 <= server_settings["socket"] <= 2:
2876
server_settings["socket"] = os.dup(server_settings
1467
server_settings["port"] = server_config.getint(u"DEFAULT",
2878
1469
del server_config
2880
1471
# Override the settings from the config file with command line
2881
1472
# options, if set.
2882
for option in ("interface", "address", "port", "debug",
2883
"priority", "servicename", "configdir", "use_dbus",
2884
"use_ipv6", "debuglevel", "restore", "statedir",
2885
"socket", "foreground", "zeroconf"):
1473
for option in (u"interface", u"address", u"port", u"debug",
1474
u"priority", u"servicename", u"configdir",
1475
u"use_dbus", u"use_ipv6"):
2886
1476
value = getattr(options, option)
2887
1477
if value is not None:
2888
1478
server_settings[option] = value
2890
1480
# Force all strings to be unicode
2891
1481
for option in server_settings.keys():
2892
if isinstance(server_settings[option], bytes):
2893
server_settings[option] = (server_settings[option]
2895
# Force all boolean options to be boolean
2896
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2897
"foreground", "zeroconf"):
2898
server_settings[option] = bool(server_settings[option])
2899
# Debug implies foreground
2900
if server_settings["debug"]:
2901
server_settings["foreground"] = True
1482
if type(server_settings[option]) is str:
1483
server_settings[option] = unicode(server_settings[option])
2902
1484
# Now we have our good server settings in "server_settings"
2904
1486
##################################################################
2906
if (not server_settings["zeroconf"]
2907
and not (server_settings["port"]
2908
or server_settings["socket"] != "")):
2909
parser.error("Needs port or socket to work without Zeroconf")
2911
1488
# For convenience
2912
debug = server_settings["debug"]
2913
debuglevel = server_settings["debuglevel"]
2914
use_dbus = server_settings["use_dbus"]
2915
use_ipv6 = server_settings["use_ipv6"]
2916
stored_state_path = os.path.join(server_settings["statedir"],
2918
foreground = server_settings["foreground"]
2919
zeroconf = server_settings["zeroconf"]
2922
initlogger(debug, logging.DEBUG)
2927
level = getattr(logging, debuglevel.upper())
2928
initlogger(debug, level)
2930
if server_settings["servicename"] != "Mandos":
2931
syslogger.setFormatter(
2932
logging.Formatter('Mandos ({}) [%(process)d]:'
2933
' %(levelname)s: %(message)s'.format(
2934
server_settings["servicename"])))
1489
debug = server_settings[u"debug"]
1490
use_dbus = server_settings[u"use_dbus"]
1491
use_ipv6 = server_settings[u"use_ipv6"]
1494
syslogger.setLevel(logging.WARNING)
1495
console.setLevel(logging.WARNING)
1497
if server_settings[u"servicename"] != u"Mandos":
1498
syslogger.setFormatter(logging.Formatter
1499
(u'Mandos (%s) [%%(process)d]:'
1500
u' %%(levelname)s: %%(message)s'
1501
% server_settings[u"servicename"]))
2936
1503
# Parse config file with clients
2937
client_config = configparser.SafeConfigParser(Client
2939
client_config.read(os.path.join(server_settings["configdir"],
1504
client_defaults = { u"timeout": u"1h",
1506
u"checker": u"fping -q -- %%(host)s",
1509
client_config = configparser.SafeConfigParser(client_defaults)
1510
client_config.read(os.path.join(server_settings[u"configdir"],
2942
1513
global mandos_dbus_service
2943
1514
mandos_dbus_service = None
2946
if server_settings["socket"] != "":
2947
socketfd = server_settings["socket"]
2948
tcp_server = MandosServer(
2949
(server_settings["address"], server_settings["port"]),
2951
interface=(server_settings["interface"] or None),
2953
gnutls_priority=server_settings["priority"],
2957
pidfilename = "/run/mandos.pid"
2958
if not os.path.isdir("/run/."):
2959
pidfilename = "/var/run/mandos.pid"
2962
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2963
except IOError as e:
2964
logger.error("Could not open file %r", pidfilename,
1516
tcp_server = MandosServer((server_settings[u"address"],
1517
server_settings[u"port"]),
1519
interface=server_settings[u"interface"],
1522
server_settings[u"priority"],
1524
pidfilename = u"/var/run/mandos.pid"
1526
pidfile = open(pidfilename, u"w")
1528
logger.error(u"Could not open file %r", pidfilename)
2967
for name, group in (("_mandos", "_mandos"),
2968
("mandos", "mandos"),
2969
("nobody", "nogroup")):
1531
uid = pwd.getpwnam(u"_mandos").pw_uid
1532
gid = pwd.getpwnam(u"_mandos").pw_gid
2971
uid = pwd.getpwnam(name).pw_uid
2972
gid = pwd.getpwnam(group).pw_gid
1535
uid = pwd.getpwnam(u"mandos").pw_uid
1536
gid = pwd.getpwnam(u"mandos").pw_gid
2974
1537
except KeyError:
1539
uid = pwd.getpwnam(u"nobody").pw_uid
1540
gid = pwd.getpwnam(u"nobody").pw_gid
2983
logger.debug("Did setuid/setgid to {}:{}".format(uid,
2985
except OSError as error:
2986
logger.warning("Failed to setuid/setgid to {}:{}: {}"
2987
.format(uid, gid, os.strerror(error.errno)))
2988
if error.errno != errno.EPERM:
1547
except OSError, error:
1548
if error[0] != errno.EPERM:
1551
# Enable all possible GnuTLS debugging
2992
# Enable all possible GnuTLS debugging
2994
1553
# "Use a log level over 10 to enable all debugging options."
2995
1554
# - GnuTLS manual
2996
gnutls.global_set_log_level(11)
1555
gnutls.library.functions.gnutls_global_set_log_level(11)
1557
@gnutls.library.types.gnutls_log_func
2999
1558
def debug_gnutls(level, string):
3000
logger.debug("GnuTLS: %s", string[:-1])
3002
gnutls.global_set_log_function(debug_gnutls)
3004
# Redirect stdin so all checkers get /dev/null
3005
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
3006
os.dup2(null, sys.stdin.fileno())
3010
# Need to fork before connecting to D-Bus
3012
# Close all input and output, do double fork, etc.
3015
# multiprocessing will use threads, so before we use GLib we need
3016
# to inform GLib that threads will be used.
1559
logger.debug(u"GnuTLS: %s", string[:-1])
1561
(gnutls.library.functions
1562
.gnutls_global_set_log_function(debug_gnutls))
3019
1564
global main_loop
3020
1565
# From the Avahi example code
3021
DBusGMainLoop(set_as_default=True)
3022
main_loop = GLib.MainLoop()
1566
DBusGMainLoop(set_as_default=True )
1567
main_loop = gobject.MainLoop()
3023
1568
bus = dbus.SystemBus()
3024
1569
# End of Avahi example code
3027
bus_name = dbus.service.BusName("se.recompile.Mandos",
3030
old_bus_name = dbus.service.BusName(
3031
"se.bsnet.fukt.Mandos", bus,
3033
except dbus.exceptions.DBusException as e:
3034
logger.error("Disabling D-Bus:", exc_info=e)
1572
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1573
bus, do_not_queue=True)
1574
except dbus.exceptions.NameExistsException, e:
1575
logger.error(unicode(e) + u", disabling D-Bus")
3035
1576
use_dbus = False
3036
server_settings["use_dbus"] = False
1577
server_settings[u"use_dbus"] = False
3037
1578
tcp_server.use_dbus = False
3039
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3040
service = AvahiServiceToSyslog(
3041
name = server_settings["servicename"],
3042
servicetype = "_mandos._tcp",
3043
protocol = protocol,
3045
if server_settings["interface"]:
3046
service.interface = if_nametoindex(
3047
server_settings["interface"].encode("utf-8"))
3049
global multiprocessing_manager
3050
multiprocessing_manager = multiprocessing.Manager()
1579
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1580
service = AvahiService(name = server_settings[u"servicename"],
1581
servicetype = u"_mandos._tcp",
1582
protocol = protocol, bus = bus)
1583
if server_settings["interface"]:
1584
service.interface = (if_nametoindex
1585
(str(server_settings[u"interface"])))
3052
1587
client_class = Client
3054
1589
client_class = functools.partial(ClientDBus, bus = bus)
3056
client_settings = Client.config_parser(client_config)
3057
old_client_settings = {}
3060
# This is used to redirect stdout and stderr for checker processes
3062
wnull = open(os.devnull, "w") # A writable /dev/null
3063
# Only used if server is running in foreground but not in debug
3065
if debug or not foreground:
3068
# Get client data and settings from last running state.
3069
if server_settings["restore"]:
3071
with open(stored_state_path, "rb") as stored_state:
3072
if sys.version_info.major == 2:
3073
clients_data, old_client_settings = pickle.load(
3076
bytes_clients_data, bytes_old_client_settings = (
3077
pickle.load(stored_state, encoding = "bytes"))
3078
### Fix bytes to strings
3081
clients_data = { (key.decode("utf-8")
3082
if isinstance(key, bytes)
3085
bytes_clients_data.items() }
3086
del bytes_clients_data
3087
for key in clients_data:
3088
value = { (k.decode("utf-8")
3089
if isinstance(k, bytes) else k): v
3091
clients_data[key].items() }
3092
clients_data[key] = value
3094
value["client_structure"] = [
3096
if isinstance(s, bytes)
3098
value["client_structure"] ]
3100
for k in ("name", "host"):
3101
if isinstance(value[k], bytes):
3102
value[k] = value[k].decode("utf-8")
3103
## old_client_settings
3105
old_client_settings = {
3106
(key.decode("utf-8")
3107
if isinstance(key, bytes)
3110
bytes_old_client_settings.items() }
3111
del bytes_old_client_settings
3113
for value in old_client_settings.values():
3114
if isinstance(value["host"], bytes):
3115
value["host"] = (value["host"]
3117
os.remove(stored_state_path)
3118
except IOError as e:
3119
if e.errno == errno.ENOENT:
3120
logger.warning("Could not load persistent state:"
3121
" {}".format(os.strerror(e.errno)))
3123
logger.critical("Could not load persistent state:",
3126
except EOFError as e:
3127
logger.warning("Could not load persistent state: "
3131
with PGPEngine() as pgp:
3132
for client_name, client in clients_data.items():
3133
# Skip removed clients
3134
if client_name not in client_settings:
3137
# Decide which value to use after restoring saved state.
3138
# We have three different values: Old config file,
3139
# new config file, and saved state.
3140
# New config value takes precedence if it differs from old
3141
# config value, otherwise use saved state.
3142
for name, value in client_settings[client_name].items():
3144
# For each value in new config, check if it
3145
# differs from the old config value (Except for
3146
# the "secret" attribute)
3147
if (name != "secret"
3149
old_client_settings[client_name][name])):
3150
client[name] = value
3154
# Clients who has passed its expire date can still be
3155
# enabled if its last checker was successful. A Client
3156
# whose checker succeeded before we stored its state is
3157
# assumed to have successfully run all checkers during
3159
if client["enabled"]:
3160
if datetime.datetime.utcnow() >= client["expires"]:
3161
if not client["last_checked_ok"]:
3163
"disabling client {} - Client never "
3164
"performed a successful checker".format(
3166
client["enabled"] = False
3167
elif client["last_checker_status"] != 0:
3169
"disabling client {} - Client last"
3170
" checker failed with error code"
3173
client["last_checker_status"]))
3174
client["enabled"] = False
3176
client["expires"] = (
3177
datetime.datetime.utcnow()
3178
+ client["timeout"])
3179
logger.debug("Last checker succeeded,"
3180
" keeping {} enabled".format(
3183
client["secret"] = pgp.decrypt(
3184
client["encrypted_secret"],
3185
client_settings[client_name]["secret"])
3187
# If decryption fails, we use secret from new settings
3188
logger.debug("Failed to decrypt {} old secret".format(
3190
client["secret"] = (client_settings[client_name]
3193
# Add/remove clients based on new changes made to config
3194
for client_name in (set(old_client_settings)
3195
- set(client_settings)):
3196
del clients_data[client_name]
3197
for client_name in (set(client_settings)
3198
- set(old_client_settings)):
3199
clients_data[client_name] = client_settings[client_name]
3201
# Create all client objects
3202
for client_name, client in clients_data.items():
3203
tcp_server.clients[client_name] = client_class(
3206
server_settings = server_settings)
1590
tcp_server.clients.update(set(
1591
client_class(name = section,
1592
config= dict(client_config.items(section)))
1593
for section in client_config.sections()))
3208
1594
if not tcp_server.clients:
3209
logger.warning("No clients defined")
3212
if pidfile is not None:
1595
logger.warning(u"No clients defined")
1598
# Redirect stdin so all checkers get /dev/null
1599
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1600
os.dup2(null, sys.stdin.fileno())
1604
# No console logging
1605
logger.removeHandler(console)
1606
# Close all input and output, do double fork, etc.
1610
with closing(pidfile):
3213
1611
pid = os.getpid()
3216
print(pid, file=pidfile)
3218
logger.error("Could not write to file %r with PID %d",
1612
pidfile.write(str(pid) + "\n")
1615
logger.error(u"Could not write to file %r with PID %d",
1618
# "pidfile" was never created
3223
for termsig in (signal.SIGHUP, signal.SIGTERM):
3224
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3225
lambda: main_loop.quit() and False)
1623
signal.signal(signal.SIGINT, signal.SIG_IGN)
1624
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1625
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3229
@alternate_dbus_interfaces(
3230
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
3231
class MandosDBusService(DBusObjectWithObjectManager):
1628
class MandosDBusService(dbus.service.Object):
3232
1629
"""A D-Bus proxy object"""
3234
1630
def __init__(self):
3235
dbus.service.Object.__init__(self, bus, "/")
3237
_interface = "se.recompile.Mandos"
3239
@dbus.service.signal(_interface, signature="o")
3240
def ClientAdded(self, objpath):
1631
dbus.service.Object.__init__(self, bus, u"/")
1632
_interface = u"se.bsnet.fukt.Mandos"
1634
@dbus.service.signal(_interface, signature=u"oa{sv}")
1635
def ClientAdded(self, objpath, properties):
3244
@dbus.service.signal(_interface, signature="ss")
1639
@dbus.service.signal(_interface, signature=u"ss")
3245
1640
def ClientNotFound(self, fingerprint, address):
3249
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3251
@dbus.service.signal(_interface, signature="os")
1644
@dbus.service.signal(_interface, signature=u"os")
3252
1645
def ClientRemoved(self, objpath, name):
3256
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3258
@dbus.service.method(_interface, out_signature="ao")
1649
@dbus.service.method(_interface, out_signature=u"ao")
3259
1650
def GetAllClients(self):
3261
return dbus.Array(c.dbus_object_path for c in
3262
tcp_server.clients.values())
1652
return dbus.Array(c.dbus_object_path
1653
for c in tcp_server.clients)
3264
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3266
1655
@dbus.service.method(_interface,
3267
out_signature="a{oa{sv}}")
1656
out_signature=u"a{oa{sv}}")
3268
1657
def GetAllClientsWithProperties(self):
3270
1659
return dbus.Dictionary(
3271
{ c.dbus_object_path: c.GetAll(
3272
"se.recompile.Mandos.Client")
3273
for c in tcp_server.clients.values() },
1660
((c.dbus_object_path, c.GetAll(u""))
1661
for c in tcp_server.clients),
1662
signature=u"oa{sv}")
3276
@dbus.service.method(_interface, in_signature="o")
1664
@dbus.service.method(_interface, in_signature=u"o")
3277
1665
def RemoveClient(self, object_path):
3279
for c in tcp_server.clients.values():
1667
for c in tcp_server.clients:
3280
1668
if c.dbus_object_path == object_path:
3281
del tcp_server.clients[c.name]
1669
tcp_server.clients.remove(c)
3282
1670
c.remove_from_connection()
3283
# Don't signal the disabling
1671
# Don't signal anything except ClientRemoved
3284
1672
c.disable(quiet=True)
3285
# Emit D-Bus signal for removal
3286
self.client_removed_signal(c)
1674
self.ClientRemoved(object_path, c.name)
3288
1676
raise KeyError(object_path)
3292
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3293
out_signature = "a{oa{sa{sv}}}")
3294
def GetManagedObjects(self):
3296
return dbus.Dictionary(
3297
{ client.dbus_object_path:
3299
{ interface: client.GetAll(interface)
3301
client._get_all_interface_names()})
3302
for client in tcp_server.clients.values()})
3304
def client_added_signal(self, client):
3305
"""Send the new standard signal and the old signal"""
3307
# New standard signal
3308
self.InterfacesAdded(
3309
client.dbus_object_path,
3311
{ interface: client.GetAll(interface)
3313
client._get_all_interface_names()}))
3315
self.ClientAdded(client.dbus_object_path)
3317
def client_removed_signal(self, client):
3318
"""Send the new standard signal and the old signal"""
3320
# New standard signal
3321
self.InterfacesRemoved(
3322
client.dbus_object_path,
3323
client._get_all_interface_names())
3325
self.ClientRemoved(client.dbus_object_path,
3328
1680
mandos_dbus_service = MandosDBusService()
3330
# Save modules to variables to exempt the modules from being
3331
# unloaded before the function registered with atexit() is run.
3332
mp = multiprocessing
3335
1683
"Cleanup function; run on exit"
3339
mp.active_children()
3341
if not (tcp_server.clients or client_settings):
3344
# Store client before exiting. Secrets are encrypted with key
3345
# based on what config file has. If config file is
3346
# removed/edited, old secret will thus be unrecovable.
3348
with PGPEngine() as pgp:
3349
for client in tcp_server.clients.values():
3350
key = client_settings[client.name]["secret"]
3351
client.encrypted_secret = pgp.encrypt(client.secret,
3355
# A list of attributes that can not be pickled
3357
exclude = { "bus", "changedstate", "secret",
3358
"checker", "server_settings" }
3359
for name, typ in inspect.getmembers(dbus.service
3363
client_dict["encrypted_secret"] = (client
3365
for attr in client.client_structure:
3366
if attr not in exclude:
3367
client_dict[attr] = getattr(client, attr)
3369
clients[client.name] = client_dict
3370
del client_settings[client.name]["secret"]
3373
with tempfile.NamedTemporaryFile(
3377
dir=os.path.dirname(stored_state_path),
3378
delete=False) as stored_state:
3379
pickle.dump((clients, client_settings), stored_state,
3381
tempname = stored_state.name
3382
os.rename(tempname, stored_state_path)
3383
except (IOError, OSError) as e:
3389
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3390
logger.warning("Could not save persistent state: {}"
3391
.format(os.strerror(e.errno)))
3393
logger.warning("Could not save persistent state:",
3397
# Delete all clients, and settings from config
3398
1686
while tcp_server.clients:
3399
name, client = tcp_server.clients.popitem()
1687
client = tcp_server.clients.pop()
3401
1689
client.remove_from_connection()
3402
# Don't signal the disabling
1690
client.disable_hook = None
1691
# Don't signal anything except ClientRemoved
3403
1692
client.disable(quiet=True)
3404
# Emit D-Bus signal for removal
3406
mandos_dbus_service.client_removed_signal(client)
3407
client_settings.clear()
1695
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
3409
1698
atexit.register(cleanup)
3411
for client in tcp_server.clients.values():
1700
for client in tcp_server.clients:
3413
# Emit D-Bus signal for adding
3414
mandos_dbus_service.client_added_signal(client)
3415
# Need to initiate checking of clients
3417
client.init_checker()
1703
mandos_dbus_service.ClientAdded(client.dbus_object_path,
3419
1707
tcp_server.enable()
3420
1708
tcp_server.server_activate()
3422
1710
# Find out what port we got
3424
service.port = tcp_server.socket.getsockname()[1]
1711
service.port = tcp_server.socket.getsockname()[1]
3426
logger.info("Now listening on address %r, port %d,"
3427
" flowinfo %d, scope_id %d",
3428
*tcp_server.socket.getsockname())
1713
logger.info(u"Now listening on address %r, port %d,"
1714
" flowinfo %d, scope_id %d"
1715
% tcp_server.socket.getsockname())
3430
logger.info("Now listening on address %r, port %d",
3431
*tcp_server.socket.getsockname())
1717
logger.info(u"Now listening on address %r, port %d"
1718
% tcp_server.socket.getsockname())
3433
1720
#service.interface = tcp_server.socket.getsockname()[3]
3437
# From the Avahi example code
3440
except dbus.exceptions.DBusException as error:
3441
logger.critical("D-Bus Exception", exc_info=error)
3444
# End of Avahi example code
3446
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3447
lambda *args, **kwargs:
3448
(tcp_server.handle_request
3449
(*args[2:], **kwargs) or True))
3451
logger.debug("Starting main loop")
1723
# From the Avahi example code
1726
except dbus.exceptions.DBusException, error:
1727
logger.critical(u"DBusException: %s", error)
1730
# End of Avahi example code
1732
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1733
lambda *args, **kwargs:
1734
(tcp_server.handle_request
1735
(*args[2:], **kwargs) or True))
1737
logger.debug(u"Starting main loop")
3452
1738
main_loop.run()
3453
except AvahiError as error:
3454
logger.critical("Avahi Error", exc_info=error)
1739
except AvahiError, error:
1740
logger.critical(u"AvahiError: %s", error)
3457
1743
except KeyboardInterrupt:
3459
print("", file=sys.stderr)
3460
logger.debug("Server received KeyboardInterrupt")
3461
logger.debug("Server exiting")
1746
logger.debug(u"Server received KeyboardInterrupt")
1747
logger.debug(u"Server exiting")
3462
1748
# Must run before the D-Bus bus name gets deregistered
3466
1751
if __name__ == '__main__':