2
# -*- mode: python; after-save-hook: (lambda () (let ((command (if (fboundp 'file-local-name) (file-local-name (buffer-file-name)) (or (file-remote-p (buffer-file-name) 'localname) (buffer-file-name))))) (if (= (progn (if (get-buffer "*Test*") (kill-buffer "*Test*")) (process-file-shell-command (format "%s --check" (shell-quote-argument command)) nil "*Test*")) 0) (let ((w (get-buffer-window "*Test*"))) (if w (delete-window w))) (progn (with-current-buffer "*Test*" (compilation-mode)) (display-buffer "*Test*" '(display-buffer-in-side-window)))))); coding: utf-8 -*-
2
# -*- mode: python; coding: utf-8 -*-
4
4
# Mandos server - give out binary blobs to connecting clients.
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
13
13
# Everything else is
14
# Copyright © 2008-2020 Teddy Hogeborn
15
# Copyright © 2008-2020 Björn Påhlsson
17
# This file is part of Mandos.
19
# Mandos is free software: you can redistribute it and/or modify it
20
# under the terms of the GNU General Public License as published by
14
# Copyright © 2008-2016 Teddy Hogeborn
15
# Copyright © 2008-2016 Björn Påhlsson
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
21
19
# the Free Software Foundation, either version 3 of the License, or
22
20
# (at your option) any later version.
24
# Mandos is distributed in the hope that it will be useful, but
25
# WITHOUT ANY WARRANTY; without even the implied warranty of
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
26
24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27
25
# GNU General Public License for more details.
29
27
# You should have received a copy of the GNU General Public License
30
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
32
31
# Contact the authors at <mandos@recompile.se>.
35
34
from __future__ import (division, absolute_import, print_function,
91
86
import xml.dom.minidom
94
if sys.version_info.major == 2:
98
# Add collections.abc.Callable if it does not exist
100
collections.abc.Callable
101
except AttributeError:
103
Callable = collections.Callable
104
collections.abc = abc
107
# Add shlex.quote if it does not exist
110
except AttributeError:
111
shlex.quote = re.escape
113
# Show warnings by default
114
if not sys.warnoptions:
116
warnings.simplefilter("default")
118
# Try to find the value of SO_BINDTODEVICE:
120
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
121
# newer, and it is also the most natural place for it:
122
90
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
123
91
except AttributeError:
125
# This is where SO_BINDTODEVICE was up to and including Python
127
93
from IN import SO_BINDTODEVICE
128
94
except ImportError:
129
# In Python 2.7 it seems to have been removed entirely.
130
# Try running the C preprocessor:
132
cc = subprocess.Popen(["cc", "--language=c", "-E",
134
stdin=subprocess.PIPE,
135
stdout=subprocess.PIPE)
136
stdout = cc.communicate(
137
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
138
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
139
except (OSError, ValueError, IndexError):
141
SO_BINDTODEVICE = None
143
if sys.version_info < (3, 2):
144
configparser.Configparser = configparser.SafeConfigParser
95
SO_BINDTODEVICE = None
97
if sys.version_info.major == 2:
147
101
stored_state_file = "clients.pickle"
149
103
logger = logging.getLogger()
150
logging.captureWarnings(True) # Show warnings via the logging system
154
107
if_nametoindex = ctypes.cdll.LoadLibrary(
155
108
ctypes.util.find_library("c")).if_nametoindex
156
109
except (OSError, AttributeError):
158
111
def if_nametoindex(interface):
159
112
"Get an interface index the hard way, i.e. using fcntl()"
160
113
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
276
227
'--passphrase-file',
278
229
+ self.gnupgargs,
279
stdin=subprocess.PIPE,
280
stdout=subprocess.PIPE,
281
stderr=subprocess.PIPE)
282
ciphertext, err = proc.communicate(input=data)
230
stdin = subprocess.PIPE,
231
stdout = subprocess.PIPE,
232
stderr = subprocess.PIPE)
233
ciphertext, err = proc.communicate(input = data)
283
234
if proc.returncode != 0:
284
235
raise PGPError(err)
285
236
return ciphertext
287
238
def decrypt(self, data, password):
288
239
passphrase = self.password_encode(password)
289
240
with tempfile.NamedTemporaryFile(
290
dir=self.tempdir) as passfile:
241
dir = self.tempdir) as passfile:
291
242
passfile.write(passphrase)
293
244
proc = subprocess.Popen([self.gpg, '--decrypt',
294
245
'--passphrase-file',
296
247
+ self.gnupgargs,
297
stdin=subprocess.PIPE,
298
stdout=subprocess.PIPE,
299
stderr=subprocess.PIPE)
300
decrypted_plaintext, err = proc.communicate(input=data)
248
stdin = subprocess.PIPE,
249
stdout = subprocess.PIPE,
250
stderr = subprocess.PIPE)
251
decrypted_plaintext, err = proc.communicate(input = data)
301
252
if proc.returncode != 0:
302
253
raise PGPError(err)
303
254
return decrypted_plaintext
306
256
# Pretend that we have an Avahi module
308
"""This isn't so much a class as it is a module-like namespace."""
309
IF_UNSPEC = -1 # avahi-common/address.h
310
PROTO_UNSPEC = -1 # avahi-common/address.h
311
PROTO_INET = 0 # avahi-common/address.h
312
PROTO_INET6 = 1 # avahi-common/address.h
258
"""This isn't so much a class as it is a module-like namespace.
259
It is instantiated once, and simulates having an Avahi module."""
260
IF_UNSPEC = -1 # avahi-common/address.h
261
PROTO_UNSPEC = -1 # avahi-common/address.h
262
PROTO_INET = 0 # avahi-common/address.h
263
PROTO_INET6 = 1 # avahi-common/address.h
313
264
DBUS_NAME = "org.freedesktop.Avahi"
314
265
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
315
266
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
316
267
DBUS_PATH_SERVER = "/"
319
def string_array_to_txt_array(t):
268
def string_array_to_txt_array(self, t):
320
269
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
321
270
for s in t), signature="ay")
322
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
323
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
324
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
325
SERVER_INVALID = 0 # avahi-common/defs.h
326
SERVER_REGISTERING = 1 # avahi-common/defs.h
327
SERVER_RUNNING = 2 # avahi-common/defs.h
328
SERVER_COLLISION = 3 # avahi-common/defs.h
329
SERVER_FAILURE = 4 # avahi-common/defs.h
271
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
272
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
273
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
274
SERVER_INVALID = 0 # avahi-common/defs.h
275
SERVER_REGISTERING = 1 # avahi-common/defs.h
276
SERVER_RUNNING = 2 # avahi-common/defs.h
277
SERVER_COLLISION = 3 # avahi-common/defs.h
278
SERVER_FAILURE = 4 # avahi-common/defs.h
332
281
class AvahiError(Exception):
333
282
def __init__(self, value, *args, **kwargs):
524
473
class AvahiServiceToSyslog(AvahiService):
525
474
def rename(self, *args, **kwargs):
526
475
"""Add the new name to the syslog messages"""
527
ret = super(AvahiServiceToSyslog, self).rename(*args,
476
ret = AvahiService.rename(self, *args, **kwargs)
529
477
syslogger.setFormatter(logging.Formatter(
530
478
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
531
479
.format(self.name)))
535
482
# Pretend that we have a GnuTLS module
537
"""This isn't so much a class as it is a module-like namespace."""
539
library = ctypes.util.find_library("gnutls")
541
library = ctypes.util.find_library("gnutls-deb0")
542
_library = ctypes.cdll.LoadLibrary(library)
483
class GnuTLS(object):
484
"""This isn't so much a class as it is a module-like namespace.
485
It is instantiated once, and simulates having a GnuTLS module."""
487
_library = ctypes.cdll.LoadLibrary(
488
ctypes.util.find_library("gnutls"))
489
_need_version = b"3.3.0"
491
# Need to use class name "GnuTLS" here, since this method is
492
# called before the assignment to the "gnutls" global variable
494
if GnuTLS.check_version(self._need_version) is None:
495
raise GnuTLS.Error("Needs GnuTLS {} or later"
496
.format(self._need_version))
545
498
# Unless otherwise indicated, the constants and types below are
546
499
# all from the gnutls/gnutls.h C header file.
550
503
E_INTERRUPTED = -52
556
508
CRD_CERTIFICATE = 1
557
509
E_NO_CERTIFICATE_FOUND = -49
562
KEYID_USE_SHA256 = 1 # gnutls/x509.h
563
510
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
566
513
class session_int(ctypes.Structure):
568
515
session_t = ctypes.POINTER(session_int)
570
516
class certificate_credentials_st(ctypes.Structure):
572
518
certificate_credentials_t = ctypes.POINTER(
573
519
certificate_credentials_st)
574
520
certificate_type_t = ctypes.c_int
576
521
class datum_t(ctypes.Structure):
577
522
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
578
523
('size', ctypes.c_uint)]
580
524
class openpgp_crt_int(ctypes.Structure):
582
526
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
583
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
527
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
584
528
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
585
529
credentials_type_t = ctypes.c_int
586
530
transport_ptr_t = ctypes.c_void_p
587
531
close_request_t = ctypes.c_int
590
534
class Error(Exception):
591
def __init__(self, message=None, code=None, args=()):
535
# We need to use the class name "GnuTLS" here, since this
536
# exception might be raised from within GnuTLS.__init__,
537
# which is called before the assignment to the "gnutls"
538
# global variable has happened.
539
def __init__(self, message = None, code = None, args=()):
592
540
# Default usage is by a message string, but if a return
593
541
# code is passed, convert it to a string with
594
542
# gnutls.strerror()
596
544
if message is None and code is not None:
597
message = gnutls.strerror(code)
598
return super(gnutls.Error, self).__init__(
545
message = GnuTLS.strerror(code)
546
return super(GnuTLS.Error, self).__init__(
601
549
class CertificateSecurityError(Error):
553
class Credentials(object):
606
554
def __init__(self):
607
555
self._c_object = gnutls.certificate_credentials_t()
608
556
gnutls.certificate_allocate_credentials(
609
557
ctypes.byref(self._c_object))
610
558
self.type = gnutls.CRD_CERTIFICATE
612
560
def __del__(self):
613
561
gnutls.certificate_free_credentials(self._c_object)
616
def __init__(self, socket, credentials=None):
563
class ClientSession(object):
564
def __init__(self, socket, credentials = None):
617
565
self._c_object = gnutls.session_t()
618
gnutls_flags = gnutls.CLIENT
619
if gnutls.check_version(b"3.5.6"):
620
gnutls_flags |= gnutls.NO_TICKETS
622
gnutls_flags |= gnutls.ENABLE_RAWPK
623
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
566
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
625
567
gnutls.set_default_priority(self._c_object)
626
568
gnutls.transport_set_ptr(self._c_object, socket.fileno())
627
569
gnutls.handshake_set_private_extensions(self._c_object,
670
611
return _error_code(result)
671
612
result = func(*arguments)
674
615
# Unless otherwise indicated, the function declarations below are
675
616
# all from the gnutls/gnutls.h C header file.
678
619
priority_set_direct = _library.gnutls_priority_set_direct
679
620
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
680
621
ctypes.POINTER(ctypes.c_char_p)]
681
622
priority_set_direct.restype = _error_code
683
624
init = _library.gnutls_init
684
625
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
685
626
init.restype = _error_code
687
628
set_default_priority = _library.gnutls_set_default_priority
688
629
set_default_priority.argtypes = [session_t]
689
630
set_default_priority.restype = _error_code
691
632
record_send = _library.gnutls_record_send
692
633
record_send.argtypes = [session_t, ctypes.c_void_p,
694
635
record_send.restype = ctypes.c_ssize_t
695
636
record_send.errcheck = _retry_on_error
697
638
certificate_allocate_credentials = (
698
639
_library.gnutls_certificate_allocate_credentials)
699
640
certificate_allocate_credentials.argtypes = [
700
641
ctypes.POINTER(certificate_credentials_t)]
701
642
certificate_allocate_credentials.restype = _error_code
703
644
certificate_free_credentials = (
704
645
_library.gnutls_certificate_free_credentials)
705
certificate_free_credentials.argtypes = [
706
certificate_credentials_t]
646
certificate_free_credentials.argtypes = [certificate_credentials_t]
707
647
certificate_free_credentials.restype = None
709
649
handshake_set_private_extensions = (
710
650
_library.gnutls_handshake_set_private_extensions)
711
651
handshake_set_private_extensions.argtypes = [session_t,
713
653
handshake_set_private_extensions.restype = None
715
655
credentials_set = _library.gnutls_credentials_set
716
656
credentials_set.argtypes = [session_t, credentials_type_t,
718
658
credentials_set.restype = _error_code
720
660
strerror = _library.gnutls_strerror
721
661
strerror.argtypes = [ctypes.c_int]
722
662
strerror.restype = ctypes.c_char_p
724
664
certificate_type_get = _library.gnutls_certificate_type_get
725
665
certificate_type_get.argtypes = [session_t]
726
666
certificate_type_get.restype = _error_code
728
668
certificate_get_peers = _library.gnutls_certificate_get_peers
729
669
certificate_get_peers.argtypes = [session_t,
730
670
ctypes.POINTER(ctypes.c_uint)]
731
671
certificate_get_peers.restype = ctypes.POINTER(datum_t)
733
673
global_set_log_level = _library.gnutls_global_set_log_level
734
674
global_set_log_level.argtypes = [ctypes.c_int]
735
675
global_set_log_level.restype = None
737
677
global_set_log_function = _library.gnutls_global_set_log_function
738
678
global_set_log_function.argtypes = [log_func]
739
679
global_set_log_function.restype = None
741
681
deinit = _library.gnutls_deinit
742
682
deinit.argtypes = [session_t]
743
683
deinit.restype = None
745
685
handshake = _library.gnutls_handshake
746
686
handshake.argtypes = [session_t]
747
687
handshake.restype = _error_code
748
688
handshake.errcheck = _retry_on_error
750
690
transport_set_ptr = _library.gnutls_transport_set_ptr
751
691
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
752
692
transport_set_ptr.restype = None
754
694
bye = _library.gnutls_bye
755
695
bye.argtypes = [session_t, close_request_t]
756
696
bye.restype = _error_code
757
697
bye.errcheck = _retry_on_error
759
699
check_version = _library.gnutls_check_version
760
700
check_version.argtypes = [ctypes.c_char_p]
761
701
check_version.restype = ctypes.c_char_p
763
_need_version = b"3.3.0"
764
if check_version(_need_version) is None:
765
raise self.Error("Needs GnuTLS {} or later"
766
.format(_need_version))
768
_tls_rawpk_version = b"3.6.6"
769
has_rawpk = bool(check_version(_tls_rawpk_version))
773
class pubkey_st(ctypes.Structure):
775
pubkey_t = ctypes.POINTER(pubkey_st)
777
x509_crt_fmt_t = ctypes.c_int
779
# All the function declarations below are from
781
pubkey_init = _library.gnutls_pubkey_init
782
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
783
pubkey_init.restype = _error_code
785
pubkey_import = _library.gnutls_pubkey_import
786
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
788
pubkey_import.restype = _error_code
790
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
791
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
792
ctypes.POINTER(ctypes.c_ubyte),
793
ctypes.POINTER(ctypes.c_size_t)]
794
pubkey_get_key_id.restype = _error_code
796
pubkey_deinit = _library.gnutls_pubkey_deinit
797
pubkey_deinit.argtypes = [pubkey_t]
798
pubkey_deinit.restype = None
800
# All the function declarations below are from
803
openpgp_crt_init = _library.gnutls_openpgp_crt_init
804
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
805
openpgp_crt_init.restype = _error_code
807
openpgp_crt_import = _library.gnutls_openpgp_crt_import
808
openpgp_crt_import.argtypes = [openpgp_crt_t,
809
ctypes.POINTER(datum_t),
811
openpgp_crt_import.restype = _error_code
813
openpgp_crt_verify_self = \
814
_library.gnutls_openpgp_crt_verify_self
815
openpgp_crt_verify_self.argtypes = [
818
ctypes.POINTER(ctypes.c_uint),
820
openpgp_crt_verify_self.restype = _error_code
822
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
823
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
824
openpgp_crt_deinit.restype = None
826
openpgp_crt_get_fingerprint = (
827
_library.gnutls_openpgp_crt_get_fingerprint)
828
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
832
openpgp_crt_get_fingerprint.restype = _error_code
834
if check_version(b"3.6.4"):
835
certificate_type_get2 = _library.gnutls_certificate_type_get2
836
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
837
certificate_type_get2.restype = _error_code
703
# All the function declarations below are from gnutls/openpgp.h
705
openpgp_crt_init = _library.gnutls_openpgp_crt_init
706
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
707
openpgp_crt_init.restype = _error_code
709
openpgp_crt_import = _library.gnutls_openpgp_crt_import
710
openpgp_crt_import.argtypes = [openpgp_crt_t,
711
ctypes.POINTER(datum_t),
713
openpgp_crt_import.restype = _error_code
715
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
716
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
717
ctypes.POINTER(ctypes.c_uint)]
718
openpgp_crt_verify_self.restype = _error_code
720
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
721
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
722
openpgp_crt_deinit.restype = None
724
openpgp_crt_get_fingerprint = (
725
_library.gnutls_openpgp_crt_get_fingerprint)
726
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
730
openpgp_crt_get_fingerprint.restype = _error_code
839
732
# Remove non-public functions
840
733
del _error_code, _retry_on_error
734
# Create the global "gnutls" object, simulating a module
843
737
def call_pipe(connection, # : multiprocessing.Connection
844
738
func, *args, **kwargs):
845
739
"""This function is meant to be called by multiprocessing.Process
847
741
This function runs func(*args, **kwargs), and writes the resulting
848
742
return value on the provided multiprocessing.Connection.
850
744
connection.send(func(*args, **kwargs))
851
745
connection.close()
747
class Client(object):
855
748
"""A representation of a client host served by this server.
858
751
approved: bool(); 'None' if not yet approved/disapproved
859
752
approval_delay: datetime.timedelta(); Time to wait for approval
860
753
approval_duration: datetime.timedelta(); Duration of one approval
861
checker: multiprocessing.Process(); a running checker process used
862
to see if the client lives. 'None' if no process is
754
checker: subprocess.Popen(); a running checker process used
755
to see if the client lives.
756
'None' if no process is running.
864
757
checker_callback_tag: a GLib event source tag, or None
865
758
checker_command: string; External command which is run to check
866
759
if client lives. %() expansions are done at
1543
1428
exc_info=error)
1544
1429
return xmlstring
1548
1432
dbus.OBJECT_MANAGER_IFACE
1549
1433
except AttributeError:
1550
1434
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1553
1436
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1554
1437
"""A D-Bus object with an ObjectManager.
1556
1439
Classes inheriting from this exposes the standard
1557
1440
GetManagedObjects call and the InterfacesAdded and
1558
1441
InterfacesRemoved signals on the standard
1559
1442
"org.freedesktop.DBus.ObjectManager" interface.
1561
1444
Note: No signals are sent automatically; they must be sent
1564
1447
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1565
out_signature="a{oa{sa{sv}}}")
1448
out_signature = "a{oa{sa{sv}}}")
1566
1449
def GetManagedObjects(self):
1567
1450
"""This function must be overridden"""
1568
1451
raise NotImplementedError()
1570
1453
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1571
signature="oa{sa{sv}}")
1454
signature = "oa{sa{sv}}")
1572
1455
def InterfacesAdded(self, object_path, interfaces_and_properties):
1575
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1458
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1576
1459
def InterfacesRemoved(self, object_path, interfaces):
1579
1462
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1581
path_keyword='object_path',
1582
connection_keyword='connection')
1463
out_signature = "s",
1464
path_keyword = 'object_path',
1465
connection_keyword = 'connection')
1583
1466
def Introspect(self, object_path, connection):
1584
1467
"""Overloading of standard D-Bus method.
1586
1469
Override return argument name of GetManagedObjects to be
1587
1470
"objpath_interfaces_and_properties"
2279
2152
class ClientHandler(socketserver.BaseRequestHandler, object):
2280
2153
"""A class to handle client connections.
2282
2155
Instantiated once for each connection to handle it.
2283
2156
Note: This will run in its own forked process."""
2285
2158
def handle(self):
2286
2159
with contextlib.closing(self.server.child_pipe) as child_pipe:
2287
2160
logger.info("TCP connection from: %s",
2288
2161
str(self.client_address))
2289
2162
logger.debug("Pipe FD: %d",
2290
2163
self.server.child_pipe.fileno())
2292
2165
session = gnutls.ClientSession(self.request)
2294
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2295
# "+AES-256-CBC", "+SHA1",
2296
# "+COMP-NULL", "+CTYPE-OPENPGP",
2167
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
2168
# "+AES-256-CBC", "+SHA1",
2169
# "+COMP-NULL", "+CTYPE-OPENPGP",
2298
2171
# Use a fallback default, since this MUST be set.
2299
2172
priority = self.server.gnutls_priority
2300
2173
if priority is None:
2301
2174
priority = "NORMAL"
2302
gnutls.priority_set_direct(session._c_object,
2303
priority.encode("utf-8"),
2175
gnutls.priority_set_direct(session._c_object, priority,
2306
2178
# Start communication using the Mandos protocol
2307
2179
# Get protocol number
2308
2180
line = self.request.makefile().readline()
2531
class MultiprocessingMixIn:
2345
class MultiprocessingMixIn(object):
2532
2346
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2534
2348
def sub_process_main(self, request, address):
2536
2350
self.finish_request(request, address)
2537
2351
except Exception:
2538
2352
self.handle_error(request, address)
2539
2353
self.close_request(request)
2541
2355
def process_request(self, request, address):
2542
2356
"""Start a new process to process the request."""
2543
proc = multiprocessing.Process(target=self.sub_process_main,
2544
args=(request, address))
2357
proc = multiprocessing.Process(target = self.sub_process_main,
2358
args = (request, address))
2549
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
2363
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2550
2364
""" adds a pipe to the MixIn """
2552
2366
def process_request(self, request, client_address):
2553
2367
"""Overrides and wraps the original process_request().
2555
2369
This function creates a new pipe in self.pipe
2557
2371
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2559
2373
proc = MultiprocessingMixIn.process_request(self, request,
2560
2374
client_address)
2561
2375
self.child_pipe.close()
2562
2376
self.add_pipe(parent_pipe, proc)
2564
2378
def add_pipe(self, parent_pipe, proc):
2565
2379
"""Dummy function; override as necessary"""
2566
2380
raise NotImplementedError()
2569
2383
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2570
socketserver.TCPServer):
2384
socketserver.TCPServer, object):
2571
2385
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2574
2388
enabled: Boolean; whether this server is activated yet
2575
2389
interface: None or a network interface name (string)
2576
2390
use_ipv6: Boolean; to use IPv6 or not
2579
2393
def __init__(self, server_address, RequestHandlerClass,
2580
2394
interface=None,
2615
2428
# socket_wrapper(), if socketfd was set.
2616
2429
socketserver.TCPServer.__init__(self, server_address,
2617
2430
RequestHandlerClass)
2619
2432
def server_bind(self):
2620
2433
"""This overrides the normal server_bind() function
2621
2434
to bind to an interface if one was specified, and also NOT to
2622
2435
bind to an address or port if they were not specified."""
2623
global SO_BINDTODEVICE
2624
2436
if self.interface is not None:
2625
2437
if SO_BINDTODEVICE is None:
2626
# Fall back to a hard-coded value which seems to be
2628
logger.warning("SO_BINDTODEVICE not found, trying 25")
2629
SO_BINDTODEVICE = 25
2631
self.socket.setsockopt(
2632
socket.SOL_SOCKET, SO_BINDTODEVICE,
2633
(self.interface + "\0").encode("utf-8"))
2634
except socket.error as error:
2635
if error.errno == errno.EPERM:
2636
logger.error("No permission to bind to"
2637
" interface %s", self.interface)
2638
elif error.errno == errno.ENOPROTOOPT:
2639
logger.error("SO_BINDTODEVICE not available;"
2640
" cannot bind to interface %s",
2642
elif error.errno == errno.ENODEV:
2643
logger.error("Interface %s does not exist,"
2644
" cannot bind", self.interface)
2438
logger.error("SO_BINDTODEVICE does not exist;"
2439
" cannot bind to interface %s",
2443
self.socket.setsockopt(
2444
socket.SOL_SOCKET, SO_BINDTODEVICE,
2445
(self.interface + "\0").encode("utf-8"))
2446
except socket.error as error:
2447
if error.errno == errno.EPERM:
2448
logger.error("No permission to bind to"
2449
" interface %s", self.interface)
2450
elif error.errno == errno.ENOPROTOOPT:
2451
logger.error("SO_BINDTODEVICE not available;"
2452
" cannot bind to interface %s",
2454
elif error.errno == errno.ENODEV:
2455
logger.error("Interface %s does not exist,"
2456
" cannot bind", self.interface)
2647
2459
# Only bind(2) the socket if we really need to.
2648
2460
if self.server_address[0] or self.server_address[1]:
2649
if self.server_address[1]:
2650
self.allow_reuse_address = True
2651
2461
if not self.server_address[0]:
2652
2462
if self.address_family == socket.AF_INET6:
2653
any_address = "::" # in6addr_any
2463
any_address = "::" # in6addr_any
2655
any_address = "0.0.0.0" # INADDR_ANY
2465
any_address = "0.0.0.0" # INADDR_ANY
2656
2466
self.server_address = (any_address,
2657
2467
self.server_address[1])
2658
2468
elif not self.server_address[1]:
2692
2502
self.gnutls_priority = gnutls_priority
2693
2503
IPv6_TCPServer.__init__(self, server_address,
2694
2504
RequestHandlerClass,
2695
interface=interface,
2505
interface = interface,
2506
use_ipv6 = use_ipv6,
2507
socketfd = socketfd)
2699
2509
def server_activate(self):
2700
2510
if self.enabled:
2701
2511
return socketserver.TCPServer.server_activate(self)
2703
2513
def enable(self):
2704
2514
self.enabled = True
2706
2516
def add_pipe(self, parent_pipe, proc):
2707
2517
# Call "handle_ipc" for both data and EOF events
2708
2518
GLib.io_add_watch(
2709
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2710
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2519
parent_pipe.fileno(),
2520
GLib.IO_IN | GLib.IO_HUP,
2711
2521
functools.partial(self.handle_ipc,
2712
parent_pipe=parent_pipe,
2522
parent_pipe = parent_pipe,
2715
2525
def handle_ipc(self, source, condition,
2716
2526
parent_pipe=None,
2718
2528
client_object=None):
2719
2529
# error, or the other end of multiprocessing.Pipe has closed
2720
2530
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2721
2531
# Wait for other process to exit
2725
2535
# Read a request from the child
2726
2536
request = parent_pipe.recv()
2727
2537
command = request[0]
2729
2539
if command == 'init':
2730
key_id = request[1].decode("ascii")
2731
fpr = request[2].decode("ascii")
2732
address = request[3]
2541
address = request[2]
2734
2543
for c in self.clients.values():
2735
if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"
2736
"27AE41E4649B934CA495991B7852B855"):
2738
if key_id and c.key_id == key_id:
2741
if fpr and c.fingerprint == fpr:
2544
if c.fingerprint == fpr:
2745
logger.info("Client not found for key ID: %s, address"
2746
": %s", key_id or fpr, address)
2548
logger.info("Client not found for fingerprint: %s, ad"
2549
"dress: %s", fpr, address)
2747
2550
if self.use_dbus:
2748
2551
# Emit D-Bus signal
2749
mandos_dbus_service.ClientNotFound(key_id or fpr,
2552
mandos_dbus_service.ClientNotFound(fpr,
2751
2554
parent_pipe.send(False)
2754
2557
GLib.io_add_watch(
2755
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2756
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2558
parent_pipe.fileno(),
2559
GLib.IO_IN | GLib.IO_HUP,
2757
2560
functools.partial(self.handle_ipc,
2758
parent_pipe=parent_pipe,
2760
client_object=client))
2561
parent_pipe = parent_pipe,
2563
client_object = client))
2761
2564
parent_pipe.send(True)
2762
2565
# remove the old hook in favor of the new above hook on
2766
2569
funcname = request[1]
2767
2570
args = request[2]
2768
2571
kwargs = request[3]
2770
2573
parent_pipe.send(('data', getattr(client_object,
2771
2574
funcname)(*args,
2774
2577
if command == 'getattr':
2775
2578
attrname = request[1]
2776
2579
if isinstance(client_object.__getattribute__(attrname),
2777
collections.abc.Callable):
2580
collections.Callable):
2778
2581
parent_pipe.send(('function', ))
2780
2583
parent_pipe.send((
2781
2584
'data', client_object.__getattribute__(attrname)))
2783
2586
if command == 'setattr':
2784
2587
attrname = request[1]
2785
2588
value = request[2]
2786
2589
setattr(client_object, attrname, value)
2791
2594
def rfc3339_duration_to_delta(duration):
2792
2595
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2794
>>> timedelta = datetime.timedelta
2795
>>> rfc3339_duration_to_delta("P7D") == timedelta(7)
2797
>>> rfc3339_duration_to_delta("PT60S") == timedelta(0, 60)
2799
>>> rfc3339_duration_to_delta("PT60M") == timedelta(0, 3600)
2801
>>> rfc3339_duration_to_delta("PT24H") == timedelta(1)
2803
>>> rfc3339_duration_to_delta("P1W") == timedelta(7)
2805
>>> rfc3339_duration_to_delta("PT5M30S") == timedelta(0, 330)
2807
>>> rfc3339_duration_to_delta("P1DT3M20S") == timedelta(1, 200)
2597
>>> rfc3339_duration_to_delta("P7D")
2598
datetime.timedelta(7)
2599
>>> rfc3339_duration_to_delta("PT60S")
2600
datetime.timedelta(0, 60)
2601
>>> rfc3339_duration_to_delta("PT60M")
2602
datetime.timedelta(0, 3600)
2603
>>> rfc3339_duration_to_delta("PT24H")
2604
datetime.timedelta(1)
2605
>>> rfc3339_duration_to_delta("P1W")
2606
datetime.timedelta(7)
2607
>>> rfc3339_duration_to_delta("PT5M30S")
2608
datetime.timedelta(0, 330)
2609
>>> rfc3339_duration_to_delta("P1DT3M20S")
2610
datetime.timedelta(1, 200)
2812
2613
# Parsing an RFC 3339 duration with regular expressions is not
2813
2614
# possible - there would have to be multiple places for the same
2814
2615
# values, like seconds. The current code, while more esoteric, is
2815
2616
# cleaner without depending on a parsing library. If Python had a
2816
2617
# built-in library for parsing we would use it, but we'd like to
2817
2618
# avoid excessive use of external libraries.
2819
2620
# New type for defining tokens, syntax, and semantics all-in-one
2820
2621
Token = collections.namedtuple("Token", (
2821
2622
"regexp", # To match token; if "value" is not None, must have
3008
2806
parser.add_argument("--no-zeroconf", action="store_false",
3009
2807
dest="zeroconf", help="Do not use Zeroconf",
3012
2810
options = parser.parse_args()
2814
fail_count, test_count = doctest.testmod()
2815
sys.exit(os.EX_OK if fail_count == 0 else 1)
3014
2817
# Default values for config file for server-global settings
3015
if gnutls.has_rawpk:
3016
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
3017
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
3019
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
3020
":+SIGN-DSA-SHA256")
3021
server_defaults = {"interface": "",
3025
"priority": priority,
3026
"servicename": "Mandos",
3032
"statedir": "/var/lib/mandos",
3033
"foreground": "False",
2818
server_defaults = { "interface": "",
2823
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2824
":+SIGN-DSA-SHA256",
2825
"servicename": "Mandos",
2831
"statedir": "/var/lib/mandos",
2832
"foreground": "False",
3038
2836
# Parse config file for server-global settings
3039
server_config = configparser.ConfigParser(server_defaults)
2837
server_config = configparser.SafeConfigParser(server_defaults)
3040
2838
del server_defaults
3041
2839
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3042
# Convert the ConfigParser object to a dict
2840
# Convert the SafeConfigParser object to a dict
3043
2841
server_settings = server_config.defaults()
3044
2842
# Use the appropriate methods on the non-string config options
3045
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3046
"foreground", "zeroconf"):
2843
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
3047
2844
server_settings[option] = server_config.getboolean("DEFAULT",
3049
2846
if server_settings["port"]:
3222
3019
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3223
3020
service = AvahiServiceToSyslog(
3224
name=server_settings["servicename"],
3225
servicetype="_mandos._tcp",
3021
name = server_settings["servicename"],
3022
servicetype = "_mandos._tcp",
3023
protocol = protocol,
3228
3025
if server_settings["interface"]:
3229
3026
service.interface = if_nametoindex(
3230
3027
server_settings["interface"].encode("utf-8"))
3232
3029
global multiprocessing_manager
3233
3030
multiprocessing_manager = multiprocessing.Manager()
3235
3032
client_class = Client
3237
client_class = functools.partial(ClientDBus, bus=bus)
3034
client_class = functools.partial(ClientDBus, bus = bus)
3239
3036
client_settings = Client.config_parser(client_config)
3240
3037
old_client_settings = {}
3241
3038
clients_data = {}
3243
3040
# This is used to redirect stdout and stderr for checker processes
3245
wnull = open(os.devnull, "w") # A writable /dev/null
3042
wnull = open(os.devnull, "w") # A writable /dev/null
3246
3043
# Only used if server is running in foreground but not in debug
3248
3045
if debug or not foreground:
3251
3048
# Get client data and settings from last running state.
3252
3049
if server_settings["restore"]:
3254
3051
with open(stored_state_path, "rb") as stored_state:
3255
if sys.version_info.major == 2:
3052
if sys.version_info.major == 2:
3256
3053
clients_data, old_client_settings = pickle.load(
3259
3056
bytes_clients_data, bytes_old_client_settings = (
3260
pickle.load(stored_state, encoding="bytes"))
3261
# Fix bytes to strings
3057
pickle.load(stored_state, encoding = "bytes"))
3058
### Fix bytes to strings
3264
clients_data = {(key.decode("utf-8")
3265
if isinstance(key, bytes)
3268
bytes_clients_data.items()}
3061
clients_data = { (key.decode("utf-8")
3062
if isinstance(key, bytes)
3065
bytes_clients_data.items() }
3269
3066
del bytes_clients_data
3270
3067
for key in clients_data:
3271
value = {(k.decode("utf-8")
3272
if isinstance(k, bytes) else k): v
3274
clients_data[key].items()}
3068
value = { (k.decode("utf-8")
3069
if isinstance(k, bytes) else k): v
3071
clients_data[key].items() }
3275
3072
clients_data[key] = value
3276
3073
# .client_structure
3277
3074
value["client_structure"] = [
3278
3075
(s.decode("utf-8")
3279
3076
if isinstance(s, bytes)
3280
3077
else s) for s in
3281
value["client_structure"]]
3282
# .name, .host, and .checker_command
3283
for k in ("name", "host", "checker_command"):
3078
value["client_structure"] ]
3080
for k in ("name", "host"):
3284
3081
if isinstance(value[k], bytes):
3285
3082
value[k] = value[k].decode("utf-8")
3286
if "key_id" not in value:
3287
value["key_id"] = ""
3288
elif "fingerprint" not in value:
3289
value["fingerprint"] = ""
3290
# old_client_settings
3083
## old_client_settings
3292
3085
old_client_settings = {
3293
3086
(key.decode("utf-8")
3294
3087
if isinstance(key, bytes)
3295
3088
else key): value
3296
3089
for key, value in
3297
bytes_old_client_settings.items()}
3090
bytes_old_client_settings.items() }
3298
3091
del bytes_old_client_settings
3299
# .host and .checker_command
3300
3093
for value in old_client_settings.values():
3301
for attribute in ("host", "checker_command"):
3302
if isinstance(value[attribute], bytes):
3303
value[attribute] = (value[attribute]
3094
if isinstance(value["host"], bytes):
3095
value["host"] = (value["host"]
3305
3097
os.remove(stored_state_path)
3306
3098
except IOError as e:
3307
3099
if e.errno == errno.ENOENT: