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