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 © 2008-2019 Teddy Hogeborn
15
# Copyright © 2008-2019 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
90
import xml.dom.minidom
93
if sys.version_info.major == 2:
97
# Add collections.abc.Callable if it does not exist
99
collections.abc.Callable
100
except AttributeError:
102
Callable = collections.Callable
103
collections.abc = abc
106
# Show warnings by default
107
if not sys.warnoptions:
109
warnings.simplefilter("default")
111
# Try to find the value of SO_BINDTODEVICE:
113
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
114
# newer, and it is also the most natural place for it:
90
115
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
91
116
except AttributeError:
118
# This is where SO_BINDTODEVICE was up to and including Python
93
120
from IN import SO_BINDTODEVICE
94
121
except ImportError:
95
SO_BINDTODEVICE = None
97
if sys.version_info.major == 2:
122
# In Python 2.7 it seems to have been removed entirely.
123
# Try running the C preprocessor:
125
cc = subprocess.Popen(["cc", "--language=c", "-E",
127
stdin=subprocess.PIPE,
128
stdout=subprocess.PIPE)
129
stdout = cc.communicate(
130
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
131
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
132
except (OSError, ValueError, IndexError):
134
SO_BINDTODEVICE = None
136
if sys.version_info < (3, 2):
137
configparser.Configparser = configparser.SafeConfigParser
101
140
stored_state_file = "clients.pickle"
103
142
logger = logging.getLogger()
143
logging.captureWarnings(True) # Show warnings via the logging system
107
147
if_nametoindex = ctypes.cdll.LoadLibrary(
108
148
ctypes.util.find_library("c")).if_nametoindex
109
149
except (OSError, AttributeError):
111
151
def if_nametoindex(interface):
112
152
"Get an interface index the hard way, i.e. using fcntl()"
113
153
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
227
269
'--passphrase-file',
229
271
+ self.gnupgargs,
230
stdin = subprocess.PIPE,
231
stdout = subprocess.PIPE,
232
stderr = subprocess.PIPE)
233
ciphertext, err = proc.communicate(input = data)
272
stdin=subprocess.PIPE,
273
stdout=subprocess.PIPE,
274
stderr=subprocess.PIPE)
275
ciphertext, err = proc.communicate(input=data)
234
276
if proc.returncode != 0:
235
277
raise PGPError(err)
236
278
return ciphertext
238
280
def decrypt(self, data, password):
239
281
passphrase = self.password_encode(password)
240
282
with tempfile.NamedTemporaryFile(
241
dir = self.tempdir) as passfile:
283
dir=self.tempdir) as passfile:
242
284
passfile.write(passphrase)
244
286
proc = subprocess.Popen([self.gpg, '--decrypt',
245
287
'--passphrase-file',
247
289
+ self.gnupgargs,
248
stdin = subprocess.PIPE,
249
stdout = subprocess.PIPE,
250
stderr = subprocess.PIPE)
251
decrypted_plaintext, err = proc.communicate(input = data)
290
stdin=subprocess.PIPE,
291
stdout=subprocess.PIPE,
292
stderr=subprocess.PIPE)
293
decrypted_plaintext, err = proc.communicate(input=data)
252
294
if proc.returncode != 0:
253
295
raise PGPError(err)
254
296
return decrypted_plaintext
256
299
# 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
301
"""This isn't so much a class as it is a module-like namespace."""
302
IF_UNSPEC = -1 # avahi-common/address.h
303
PROTO_UNSPEC = -1 # avahi-common/address.h
304
PROTO_INET = 0 # avahi-common/address.h
305
PROTO_INET6 = 1 # avahi-common/address.h
264
306
DBUS_NAME = "org.freedesktop.Avahi"
265
307
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
266
308
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
267
309
DBUS_PATH_SERVER = "/"
268
def string_array_to_txt_array(self, t):
312
def string_array_to_txt_array(t):
269
313
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
270
314
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
315
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
316
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
317
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
318
SERVER_INVALID = 0 # avahi-common/defs.h
319
SERVER_REGISTERING = 1 # avahi-common/defs.h
320
SERVER_RUNNING = 2 # avahi-common/defs.h
321
SERVER_COLLISION = 3 # avahi-common/defs.h
322
SERVER_FAILURE = 4 # avahi-common/defs.h
281
325
class AvahiError(Exception):
282
326
def __init__(self, value, *args, **kwargs):
473
517
class AvahiServiceToSyslog(AvahiService):
474
518
def rename(self, *args, **kwargs):
475
519
"""Add the new name to the syslog messages"""
476
ret = AvahiService.rename(self, *args, **kwargs)
520
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
477
521
syslogger.setFormatter(logging.Formatter(
478
522
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
479
523
.format(self.name)))
482
527
# 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))
529
"""This isn't so much a class as it is a module-like namespace."""
531
library = ctypes.util.find_library("gnutls")
533
library = ctypes.util.find_library("gnutls-deb0")
534
_library = ctypes.cdll.LoadLibrary(library)
498
537
# Unless otherwise indicated, the constants and types below are
499
538
# all from the gnutls/gnutls.h C header file.
503
542
E_INTERRUPTED = -52
508
548
CRD_CERTIFICATE = 1
509
549
E_NO_CERTIFICATE_FOUND = -49
554
KEYID_USE_SHA256 = 1 # gnutls/x509.h
510
555
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
513
558
class session_int(ctypes.Structure):
515
560
session_t = ctypes.POINTER(session_int)
516
562
class certificate_credentials_st(ctypes.Structure):
518
564
certificate_credentials_t = ctypes.POINTER(
519
565
certificate_credentials_st)
520
566
certificate_type_t = ctypes.c_int
521
568
class datum_t(ctypes.Structure):
522
569
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
523
570
('size', ctypes.c_uint)]
524
572
class openpgp_crt_int(ctypes.Structure):
526
574
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
527
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
575
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
528
576
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
529
577
credentials_type_t = ctypes.c_int
530
578
transport_ptr_t = ctypes.c_void_p
531
579
close_request_t = ctypes.c_int
534
582
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=()):
583
def __init__(self, message=None, code=None, args=()):
540
584
# Default usage is by a message string, but if a return
541
585
# code is passed, convert it to a string with
542
586
# gnutls.strerror()
544
588
if message is None and code is not None:
545
message = GnuTLS.strerror(code)
546
return super(GnuTLS.Error, self).__init__(
589
message = gnutls.strerror(code)
590
return super(gnutls.Error, self).__init__(
549
593
class CertificateSecurityError(Error):
553
class Credentials(object):
554
598
def __init__(self):
555
599
self._c_object = gnutls.certificate_credentials_t()
556
600
gnutls.certificate_allocate_credentials(
557
601
ctypes.byref(self._c_object))
558
602
self.type = gnutls.CRD_CERTIFICATE
560
604
def __del__(self):
561
605
gnutls.certificate_free_credentials(self._c_object)
563
class ClientSession(object):
564
def __init__(self, socket, credentials = None):
608
def __init__(self, socket, credentials=None):
565
609
self._c_object = gnutls.session_t()
566
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
610
gnutls_flags = gnutls.CLIENT
611
if gnutls.check_version(b"3.5.6"):
612
gnutls_flags |= gnutls.NO_TICKETS
614
gnutls_flags |= gnutls.ENABLE_RAWPK
615
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
567
617
gnutls.set_default_priority(self._c_object)
568
618
gnutls.transport_set_ptr(self._c_object, socket.fileno())
569
619
gnutls.handshake_set_private_extensions(self._c_object,
611
661
return _error_code(result)
612
662
result = func(*arguments)
615
665
# Unless otherwise indicated, the function declarations below are
616
666
# all from the gnutls/gnutls.h C header file.
619
669
priority_set_direct = _library.gnutls_priority_set_direct
620
670
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
621
671
ctypes.POINTER(ctypes.c_char_p)]
622
672
priority_set_direct.restype = _error_code
624
674
init = _library.gnutls_init
625
675
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
626
676
init.restype = _error_code
628
678
set_default_priority = _library.gnutls_set_default_priority
629
679
set_default_priority.argtypes = [session_t]
630
680
set_default_priority.restype = _error_code
632
682
record_send = _library.gnutls_record_send
633
683
record_send.argtypes = [session_t, ctypes.c_void_p,
635
685
record_send.restype = ctypes.c_ssize_t
636
686
record_send.errcheck = _retry_on_error
638
688
certificate_allocate_credentials = (
639
689
_library.gnutls_certificate_allocate_credentials)
640
690
certificate_allocate_credentials.argtypes = [
641
691
ctypes.POINTER(certificate_credentials_t)]
642
692
certificate_allocate_credentials.restype = _error_code
644
694
certificate_free_credentials = (
645
695
_library.gnutls_certificate_free_credentials)
646
certificate_free_credentials.argtypes = [certificate_credentials_t]
696
certificate_free_credentials.argtypes = [
697
certificate_credentials_t]
647
698
certificate_free_credentials.restype = None
649
700
handshake_set_private_extensions = (
650
701
_library.gnutls_handshake_set_private_extensions)
651
702
handshake_set_private_extensions.argtypes = [session_t,
653
704
handshake_set_private_extensions.restype = None
655
706
credentials_set = _library.gnutls_credentials_set
656
707
credentials_set.argtypes = [session_t, credentials_type_t,
658
709
credentials_set.restype = _error_code
660
711
strerror = _library.gnutls_strerror
661
712
strerror.argtypes = [ctypes.c_int]
662
713
strerror.restype = ctypes.c_char_p
664
715
certificate_type_get = _library.gnutls_certificate_type_get
665
716
certificate_type_get.argtypes = [session_t]
666
717
certificate_type_get.restype = _error_code
668
719
certificate_get_peers = _library.gnutls_certificate_get_peers
669
720
certificate_get_peers.argtypes = [session_t,
670
721
ctypes.POINTER(ctypes.c_uint)]
671
722
certificate_get_peers.restype = ctypes.POINTER(datum_t)
673
724
global_set_log_level = _library.gnutls_global_set_log_level
674
725
global_set_log_level.argtypes = [ctypes.c_int]
675
726
global_set_log_level.restype = None
677
728
global_set_log_function = _library.gnutls_global_set_log_function
678
729
global_set_log_function.argtypes = [log_func]
679
730
global_set_log_function.restype = None
681
732
deinit = _library.gnutls_deinit
682
733
deinit.argtypes = [session_t]
683
734
deinit.restype = None
685
736
handshake = _library.gnutls_handshake
686
737
handshake.argtypes = [session_t]
687
738
handshake.restype = _error_code
688
739
handshake.errcheck = _retry_on_error
690
741
transport_set_ptr = _library.gnutls_transport_set_ptr
691
742
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
692
743
transport_set_ptr.restype = None
694
745
bye = _library.gnutls_bye
695
746
bye.argtypes = [session_t, close_request_t]
696
747
bye.restype = _error_code
697
748
bye.errcheck = _retry_on_error
699
750
check_version = _library.gnutls_check_version
700
751
check_version.argtypes = [ctypes.c_char_p]
701
752
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
754
_need_version = b"3.3.0"
755
if check_version(_need_version) is None:
756
raise self.Error("Needs GnuTLS {} or later"
757
.format(_need_version))
759
_tls_rawpk_version = b"3.6.6"
760
has_rawpk = bool(check_version(_tls_rawpk_version))
764
class pubkey_st(ctypes.Structure):
766
pubkey_t = ctypes.POINTER(pubkey_st)
768
x509_crt_fmt_t = ctypes.c_int
770
# All the function declarations below are from gnutls/abstract.h
771
pubkey_init = _library.gnutls_pubkey_init
772
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
773
pubkey_init.restype = _error_code
775
pubkey_import = _library.gnutls_pubkey_import
776
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
778
pubkey_import.restype = _error_code
780
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
781
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
782
ctypes.POINTER(ctypes.c_ubyte),
783
ctypes.POINTER(ctypes.c_size_t)]
784
pubkey_get_key_id.restype = _error_code
786
pubkey_deinit = _library.gnutls_pubkey_deinit
787
pubkey_deinit.argtypes = [pubkey_t]
788
pubkey_deinit.restype = None
790
# All the function declarations below are from gnutls/openpgp.h
792
openpgp_crt_init = _library.gnutls_openpgp_crt_init
793
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
794
openpgp_crt_init.restype = _error_code
796
openpgp_crt_import = _library.gnutls_openpgp_crt_import
797
openpgp_crt_import.argtypes = [openpgp_crt_t,
798
ctypes.POINTER(datum_t),
800
openpgp_crt_import.restype = _error_code
802
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
803
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
804
ctypes.POINTER(ctypes.c_uint)]
805
openpgp_crt_verify_self.restype = _error_code
807
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
808
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
809
openpgp_crt_deinit.restype = None
811
openpgp_crt_get_fingerprint = (
812
_library.gnutls_openpgp_crt_get_fingerprint)
813
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
817
openpgp_crt_get_fingerprint.restype = _error_code
819
if check_version(b"3.6.4"):
820
certificate_type_get2 = _library.gnutls_certificate_type_get2
821
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
822
certificate_type_get2.restype = _error_code
732
824
# Remove non-public functions
733
825
del _error_code, _retry_on_error
734
# Create the global "gnutls" object, simulating a module
737
828
def call_pipe(connection, # : multiprocessing.Connection
738
829
func, *args, **kwargs):
739
830
"""This function is meant to be called by multiprocessing.Process
741
832
This function runs func(*args, **kwargs), and writes the resulting
742
833
return value on the provided multiprocessing.Connection.
744
835
connection.send(func(*args, **kwargs))
745
836
connection.close()
747
class Client(object):
748
840
"""A representation of a client host served by this server.
751
843
approved: bool(); 'None' if not yet approved/disapproved
752
844
approval_delay: datetime.timedelta(); Time to wait for approval
753
845
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.
846
checker: multiprocessing.Process(); a running checker process used
847
to see if the client lives. 'None' if no process is
757
849
checker_callback_tag: a GLib event source tag, or None
758
850
checker_command: string; External command which is run to check
759
851
if client lives. %() expansions are done at
1428
1528
exc_info=error)
1429
1529
return xmlstring
1432
1533
dbus.OBJECT_MANAGER_IFACE
1433
1534
except AttributeError:
1434
1535
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1436
1538
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1437
1539
"""A D-Bus object with an ObjectManager.
1439
1541
Classes inheriting from this exposes the standard
1440
1542
GetManagedObjects call and the InterfacesAdded and
1441
1543
InterfacesRemoved signals on the standard
1442
1544
"org.freedesktop.DBus.ObjectManager" interface.
1444
1546
Note: No signals are sent automatically; they must be sent
1447
1549
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1448
out_signature = "a{oa{sa{sv}}}")
1550
out_signature="a{oa{sa{sv}}}")
1449
1551
def GetManagedObjects(self):
1450
1552
"""This function must be overridden"""
1451
1553
raise NotImplementedError()
1453
1555
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1454
signature = "oa{sa{sv}}")
1556
signature="oa{sa{sv}}")
1455
1557
def InterfacesAdded(self, object_path, interfaces_and_properties):
1458
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1560
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1459
1561
def InterfacesRemoved(self, object_path, interfaces):
1462
1564
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1463
out_signature = "s",
1464
path_keyword = 'object_path',
1465
connection_keyword = 'connection')
1566
path_keyword='object_path',
1567
connection_keyword='connection')
1466
1568
def Introspect(self, object_path, connection):
1467
1569
"""Overloading of standard D-Bus method.
1469
1571
Override return argument name of GetManagedObjects to be
1470
1572
"objpath_interfaces_and_properties"
2152
2264
class ClientHandler(socketserver.BaseRequestHandler, object):
2153
2265
"""A class to handle client connections.
2155
2267
Instantiated once for each connection to handle it.
2156
2268
Note: This will run in its own forked process."""
2158
2270
def handle(self):
2159
2271
with contextlib.closing(self.server.child_pipe) as child_pipe:
2160
2272
logger.info("TCP connection from: %s",
2161
2273
str(self.client_address))
2162
2274
logger.debug("Pipe FD: %d",
2163
2275
self.server.child_pipe.fileno())
2165
2277
session = gnutls.ClientSession(self.request)
2167
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
2168
# "+AES-256-CBC", "+SHA1",
2169
# "+COMP-NULL", "+CTYPE-OPENPGP",
2279
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2280
# "+AES-256-CBC", "+SHA1",
2281
# "+COMP-NULL", "+CTYPE-OPENPGP",
2171
2283
# Use a fallback default, since this MUST be set.
2172
2284
priority = self.server.gnutls_priority
2173
2285
if priority is None:
2174
2286
priority = "NORMAL"
2175
gnutls.priority_set_direct(session._c_object, priority,
2287
gnutls.priority_set_direct(session._c_object,
2288
priority.encode("utf-8"),
2178
2291
# Start communication using the Mandos protocol
2179
2292
# Get protocol number
2180
2293
line = self.request.makefile().readline()
2345
class MultiprocessingMixIn(object):
2515
class MultiprocessingMixIn:
2346
2516
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2348
2518
def sub_process_main(self, request, address):
2350
2520
self.finish_request(request, address)
2351
2521
except Exception:
2352
2522
self.handle_error(request, address)
2353
2523
self.close_request(request)
2355
2525
def process_request(self, request, address):
2356
2526
"""Start a new process to process the request."""
2357
proc = multiprocessing.Process(target = self.sub_process_main,
2358
args = (request, address))
2527
proc = multiprocessing.Process(target=self.sub_process_main,
2528
args=(request, address))
2363
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2533
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
2364
2534
""" adds a pipe to the MixIn """
2366
2536
def process_request(self, request, client_address):
2367
2537
"""Overrides and wraps the original process_request().
2369
2539
This function creates a new pipe in self.pipe
2371
2541
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2373
2543
proc = MultiprocessingMixIn.process_request(self, request,
2374
2544
client_address)
2375
2545
self.child_pipe.close()
2376
2546
self.add_pipe(parent_pipe, proc)
2378
2548
def add_pipe(self, parent_pipe, proc):
2379
2549
"""Dummy function; override as necessary"""
2380
2550
raise NotImplementedError()
2383
2553
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2384
socketserver.TCPServer, object):
2554
socketserver.TCPServer):
2385
2555
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2388
2558
enabled: Boolean; whether this server is activated yet
2389
2559
interface: None or a network interface name (string)
2390
2560
use_ipv6: Boolean; to use IPv6 or not
2393
2563
def __init__(self, server_address, RequestHandlerClass,
2394
2564
interface=None,
2428
2599
# socket_wrapper(), if socketfd was set.
2429
2600
socketserver.TCPServer.__init__(self, server_address,
2430
2601
RequestHandlerClass)
2432
2603
def server_bind(self):
2433
2604
"""This overrides the normal server_bind() function
2434
2605
to bind to an interface if one was specified, and also NOT to
2435
2606
bind to an address or port if they were not specified."""
2607
global SO_BINDTODEVICE
2436
2608
if self.interface is not None:
2437
2609
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)
2610
# Fall back to a hard-coded value which seems to be
2612
logger.warning("SO_BINDTODEVICE not found, trying 25")
2613
SO_BINDTODEVICE = 25
2615
self.socket.setsockopt(
2616
socket.SOL_SOCKET, SO_BINDTODEVICE,
2617
(self.interface + "\0").encode("utf-8"))
2618
except socket.error as error:
2619
if error.errno == errno.EPERM:
2620
logger.error("No permission to bind to"
2621
" interface %s", self.interface)
2622
elif error.errno == errno.ENOPROTOOPT:
2623
logger.error("SO_BINDTODEVICE not available;"
2624
" cannot bind to interface %s",
2626
elif error.errno == errno.ENODEV:
2627
logger.error("Interface %s does not exist,"
2628
" cannot bind", self.interface)
2459
2631
# Only bind(2) the socket if we really need to.
2460
2632
if self.server_address[0] or self.server_address[1]:
2633
if self.server_address[1]:
2634
self.allow_reuse_address = True
2461
2635
if not self.server_address[0]:
2462
2636
if self.address_family == socket.AF_INET6:
2463
any_address = "::" # in6addr_any
2637
any_address = "::" # in6addr_any
2465
any_address = "0.0.0.0" # INADDR_ANY
2639
any_address = "0.0.0.0" # INADDR_ANY
2466
2640
self.server_address = (any_address,
2467
2641
self.server_address[1])
2468
2642
elif not self.server_address[1]:
2502
2676
self.gnutls_priority = gnutls_priority
2503
2677
IPv6_TCPServer.__init__(self, server_address,
2504
2678
RequestHandlerClass,
2505
interface = interface,
2506
use_ipv6 = use_ipv6,
2507
socketfd = socketfd)
2679
interface=interface,
2509
2683
def server_activate(self):
2510
2684
if self.enabled:
2511
2685
return socketserver.TCPServer.server_activate(self)
2513
2687
def enable(self):
2514
2688
self.enabled = True
2516
2690
def add_pipe(self, parent_pipe, proc):
2517
2691
# Call "handle_ipc" for both data and EOF events
2518
2692
GLib.io_add_watch(
2519
parent_pipe.fileno(),
2520
GLib.IO_IN | GLib.IO_HUP,
2693
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2694
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2521
2695
functools.partial(self.handle_ipc,
2522
parent_pipe = parent_pipe,
2696
parent_pipe=parent_pipe,
2525
2699
def handle_ipc(self, source, condition,
2526
2700
parent_pipe=None,
2528
2702
client_object=None):
2529
2703
# error, or the other end of multiprocessing.Pipe has closed
2530
2704
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2531
2705
# Wait for other process to exit
2535
2709
# Read a request from the child
2536
2710
request = parent_pipe.recv()
2537
2711
command = request[0]
2539
2713
if command == 'init':
2541
address = request[2]
2714
key_id = request[1].decode("ascii")
2715
fpr = request[2].decode("ascii")
2716
address = request[3]
2543
2718
for c in self.clients.values():
2544
if c.fingerprint == fpr:
2719
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2721
if key_id and c.key_id == key_id:
2724
if fpr and c.fingerprint == fpr:
2548
logger.info("Client not found for fingerprint: %s, ad"
2549
"dress: %s", fpr, address)
2728
logger.info("Client not found for key ID: %s, address"
2729
": %s", key_id or fpr, address)
2550
2730
if self.use_dbus:
2551
2731
# Emit D-Bus signal
2552
mandos_dbus_service.ClientNotFound(fpr,
2732
mandos_dbus_service.ClientNotFound(key_id or fpr,
2554
2734
parent_pipe.send(False)
2557
2737
GLib.io_add_watch(
2558
parent_pipe.fileno(),
2559
GLib.IO_IN | GLib.IO_HUP,
2738
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2739
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2560
2740
functools.partial(self.handle_ipc,
2561
parent_pipe = parent_pipe,
2563
client_object = client))
2741
parent_pipe=parent_pipe,
2743
client_object=client))
2564
2744
parent_pipe.send(True)
2565
2745
# remove the old hook in favor of the new above hook on
2569
2749
funcname = request[1]
2570
2750
args = request[2]
2571
2751
kwargs = request[3]
2573
2753
parent_pipe.send(('data', getattr(client_object,
2574
2754
funcname)(*args,
2577
2757
if command == 'getattr':
2578
2758
attrname = request[1]
2579
2759
if isinstance(client_object.__getattribute__(attrname),
2580
collections.Callable):
2760
collections.abc.Callable):
2581
2761
parent_pipe.send(('function', ))
2583
2763
parent_pipe.send((
2584
2764
'data', client_object.__getattribute__(attrname)))
2586
2766
if command == 'setattr':
2587
2767
attrname = request[1]
2588
2768
value = request[2]
2589
2769
setattr(client_object, attrname, value)
2594
2774
def rfc3339_duration_to_delta(duration):
2595
2775
"""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)
2777
>>> rfc3339_duration_to_delta("P7D") == datetime.timedelta(7)
2779
>>> rfc3339_duration_to_delta("PT60S") == datetime.timedelta(0, 60)
2781
>>> rfc3339_duration_to_delta("PT60M") == datetime.timedelta(0, 3600)
2783
>>> rfc3339_duration_to_delta("PT24H") == datetime.timedelta(1)
2785
>>> rfc3339_duration_to_delta("P1W") == datetime.timedelta(7)
2787
>>> rfc3339_duration_to_delta("PT5M30S") == datetime.timedelta(0, 330)
2789
>>> rfc3339_duration_to_delta("P1DT3M20S") == datetime.timedelta(1, 200)
2613
2793
# Parsing an RFC 3339 duration with regular expressions is not
2614
2794
# possible - there would have to be multiple places for the same
2615
2795
# values, like seconds. The current code, while more esoteric, is
2616
2796
# cleaner without depending on a parsing library. If Python had a
2617
2797
# built-in library for parsing we would use it, but we'd like to
2618
2798
# avoid excessive use of external libraries.
2620
2800
# New type for defining tokens, syntax, and semantics all-in-one
2621
2801
Token = collections.namedtuple("Token", (
2622
2802
"regexp", # To match token; if "value" is not None, must have
2806
2989
parser.add_argument("--no-zeroconf", action="store_false",
2807
2990
dest="zeroconf", help="Do not use Zeroconf",
2810
2993
options = parser.parse_args()
2814
fail_count, test_count = doctest.testmod()
2815
sys.exit(os.EX_OK if fail_count == 0 else 1)
2817
2995
# 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",
2996
if gnutls.has_rawpk:
2997
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2998
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
3000
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
3001
":+SIGN-DSA-SHA256")
3002
server_defaults = {"interface": "",
3006
"priority": priority,
3007
"servicename": "Mandos",
3013
"statedir": "/var/lib/mandos",
3014
"foreground": "False",
2836
3019
# Parse config file for server-global settings
2837
server_config = configparser.SafeConfigParser(server_defaults)
3020
server_config = configparser.ConfigParser(server_defaults)
2838
3021
del server_defaults
2839
3022
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2840
# Convert the SafeConfigParser object to a dict
3023
# Convert the ConfigParser object to a dict
2841
3024
server_settings = server_config.defaults()
2842
3025
# Use the appropriate methods on the non-string config options
2843
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
3026
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3027
"foreground", "zeroconf"):
2844
3028
server_settings[option] = server_config.getboolean("DEFAULT",
2846
3030
if server_settings["port"]:
3019
3203
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3020
3204
service = AvahiServiceToSyslog(
3021
name = server_settings["servicename"],
3022
servicetype = "_mandos._tcp",
3023
protocol = protocol,
3205
name=server_settings["servicename"],
3206
servicetype="_mandos._tcp",
3025
3209
if server_settings["interface"]:
3026
3210
service.interface = if_nametoindex(
3027
3211
server_settings["interface"].encode("utf-8"))
3029
3213
global multiprocessing_manager
3030
3214
multiprocessing_manager = multiprocessing.Manager()
3032
3216
client_class = Client
3034
client_class = functools.partial(ClientDBus, bus = bus)
3218
client_class = functools.partial(ClientDBus, bus=bus)
3036
3220
client_settings = Client.config_parser(client_config)
3037
3221
old_client_settings = {}
3038
3222
clients_data = {}
3040
3224
# This is used to redirect stdout and stderr for checker processes
3042
wnull = open(os.devnull, "w") # A writable /dev/null
3226
wnull = open(os.devnull, "w") # A writable /dev/null
3043
3227
# Only used if server is running in foreground but not in debug
3045
3229
if debug or not foreground:
3048
3232
# Get client data and settings from last running state.
3049
3233
if server_settings["restore"]:
3051
3235
with open(stored_state_path, "rb") as stored_state:
3052
if sys.version_info.major == 2:
3236
if sys.version_info.major == 2:
3053
3237
clients_data, old_client_settings = pickle.load(
3056
3240
bytes_clients_data, bytes_old_client_settings = (
3057
pickle.load(stored_state, encoding = "bytes"))
3058
### Fix bytes to strings
3241
pickle.load(stored_state, encoding="bytes"))
3242
# Fix bytes to strings
3061
clients_data = { (key.decode("utf-8")
3062
if isinstance(key, bytes)
3065
bytes_clients_data.items() }
3245
clients_data = {(key.decode("utf-8")
3246
if isinstance(key, bytes)
3249
bytes_clients_data.items()}
3066
3250
del bytes_clients_data
3067
3251
for key in clients_data:
3068
value = { (k.decode("utf-8")
3069
if isinstance(k, bytes) else k): v
3071
clients_data[key].items() }
3252
value = {(k.decode("utf-8")
3253
if isinstance(k, bytes) else k): v
3255
clients_data[key].items()}
3072
3256
clients_data[key] = value
3073
3257
# .client_structure
3074
3258
value["client_structure"] = [
3075
3259
(s.decode("utf-8")
3076
3260
if isinstance(s, bytes)
3077
3261
else s) for s in
3078
value["client_structure"] ]
3080
for k in ("name", "host"):
3262
value["client_structure"]]
3263
# .name, .host, and .checker_command
3264
for k in ("name", "host", "checker_command"):
3081
3265
if isinstance(value[k], bytes):
3082
3266
value[k] = value[k].decode("utf-8")
3083
## old_client_settings
3267
if "key_id" not in value:
3268
value["key_id"] = ""
3269
elif "fingerprint" not in value:
3270
value["fingerprint"] = ""
3271
# old_client_settings
3085
3273
old_client_settings = {
3086
3274
(key.decode("utf-8")
3087
3275
if isinstance(key, bytes)
3088
3276
else key): value
3089
3277
for key, value in
3090
bytes_old_client_settings.items() }
3278
bytes_old_client_settings.items()}
3091
3279
del bytes_old_client_settings
3280
# .host and .checker_command
3093
3281
for value in old_client_settings.values():
3094
if isinstance(value["host"], bytes):
3095
value["host"] = (value["host"]
3282
for attribute in ("host", "checker_command"):
3283
if isinstance(value[attribute], bytes):
3284
value[attribute] = (value[attribute]
3097
3286
os.remove(stored_state_path)
3098
3287
except IOError as e:
3099
3288
if e.errno == errno.ENOENT:
3199
3388
pidfilename, pid)
3201
3390
del pidfilename
3203
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
3204
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3392
for termsig in (signal.SIGHUP, signal.SIGTERM):
3393
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3394
lambda: main_loop.quit() and False)
3208
3398
@alternate_dbus_interfaces(
3209
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
3399
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3210
3400
class MandosDBusService(DBusObjectWithObjectManager):
3211
3401
"""A D-Bus proxy object"""
3213
3403
def __init__(self):
3214
3404
dbus.service.Object.__init__(self, bus, "/")
3216
3406
_interface = "se.recompile.Mandos"
3218
3408
@dbus.service.signal(_interface, signature="o")
3219
3409
def ClientAdded(self, objpath):
3223
3413
@dbus.service.signal(_interface, signature="ss")
3224
def ClientNotFound(self, fingerprint, address):
3414
def ClientNotFound(self, key_id, address):
3228
3418
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3230
3420
@dbus.service.signal(_interface, signature="os")
3231
3421
def ClientRemoved(self, objpath, name):
3235
3425
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3237
3427
@dbus.service.method(_interface, out_signature="ao")