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
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11
# "AvahiService" class, and some lines in "main".
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13
# Everything else is
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# 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 © 2008-2012 Teddy Hogeborn
15
# Copyright © 2008-2012 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
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# 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.
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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/>.
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# along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
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# Contact the authors at <mandos@recompile.se>.
35
34
from __future__ import (division, absolute_import, print_function,
39
from future_builtins import *
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from future_builtins import *
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import SocketServer as socketserver
39
import SocketServer as socketserver
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import ConfigParser as configparser
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import gnutls.connection
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import gnutls.library.functions
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import gnutls.library.constants
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import gnutls.library.types
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import ConfigParser as configparser
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import cPickle as pickle
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import cPickle as pickle
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66
import multiprocessing
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74
import dbus.service
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from gi.repository import GLib
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77
from dbus.mainloop.glib import DBusGMainLoop
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80
import xml.dom.minidom
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if sys.version_info.major == 2:
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# Add collections.abc.Callable if it does not exist
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collections.abc.Callable
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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")
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# Try to find the value of SO_BINDTODEVICE:
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# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
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# newer, and it is also the most natural place for it:
122
85
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
123
86
except AttributeError:
125
# This is where SO_BINDTODEVICE was up to and including Python
127
88
from IN import SO_BINDTODEVICE
128
89
except ImportError:
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# 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",
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE)
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stdout = cc.communicate(
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"#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):
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configparser.Configparser = configparser.SafeConfigParser
90
SO_BINDTODEVICE = None
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93
stored_state_file = "clients.pickle"
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95
logger = logging.getLogger()
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logging.captureWarnings(True) # Show warnings via the logging system
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syslogger = (logging.handlers.SysLogHandler
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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = str("/dev/log")))
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if_nametoindex = ctypes.cdll.LoadLibrary(
155
ctypes.util.find_library("c")).if_nametoindex
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if_nametoindex = (ctypes.cdll.LoadLibrary
102
(ctypes.util.find_library("c"))
156
104
except (OSError, AttributeError):
158
105
def if_nametoindex(interface):
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"Get an interface index the hard way, i.e. using fcntl()"
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107
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
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108
with contextlib.closing(socket.socket()) as s:
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109
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
163
struct.pack(b"16s16x", interface))
164
interface_index = struct.unpack("I", ifreq[16:20])[0]
110
struct.pack(str("16s16x"),
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interface_index = struct.unpack(str("I"),
165
114
return interface_index
168
def copy_function(func):
169
"""Make a copy of a function"""
170
if sys.version_info.major == 2:
171
return types.FunctionType(func.func_code,
177
return types.FunctionType(func.__code__,
184
117
def initlogger(debug, level=logging.WARNING):
185
118
"""init logger and add loglevel"""
188
syslogger = (logging.handlers.SysLogHandler(
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facility=logging.handlers.SysLogHandler.LOG_DAEMON,
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syslogger.setFormatter(logging.Formatter
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121
('Mandos [%(process)d]: %(levelname)s:'
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123
logger.addHandler(syslogger)
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126
console = logging.StreamHandler()
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127
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
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172
os.rmdir(self.tempdir)
256
173
self.tempdir = None
258
175
def password_encode(self, password):
259
176
# Passphrase can not be empty and can not contain newlines or
260
177
# NUL bytes. So we prefix it and hex encode it.
261
encoded = b"mandos" + binascii.hexlify(password)
262
if len(encoded) > 2048:
263
# GnuPG can't handle long passwords, so encode differently
264
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
265
.replace(b"\n", b"\\n")
266
.replace(b"\0", b"\\x00"))
178
return b"mandos" + binascii.hexlify(password)
269
180
def encrypt(self, data, password):
270
passphrase = self.password_encode(password)
271
with tempfile.NamedTemporaryFile(
272
dir=self.tempdir) as passfile:
273
passfile.write(passphrase)
275
proc = subprocess.Popen([self.gpg, '--symmetric',
279
stdin=subprocess.PIPE,
280
stdout=subprocess.PIPE,
281
stderr=subprocess.PIPE)
282
ciphertext, err = proc.communicate(input=data)
283
if proc.returncode != 0:
181
self.gnupg.passphrase = self.password_encode(password)
182
with open(os.devnull, "w") as devnull:
184
proc = self.gnupg.run(['--symmetric'],
185
create_fhs=['stdin', 'stdout'],
186
attach_fhs={'stderr': devnull})
187
with contextlib.closing(proc.handles['stdin']) as f:
189
with contextlib.closing(proc.handles['stdout']) as f:
190
ciphertext = f.read()
194
self.gnupg.passphrase = None
285
195
return ciphertext
287
197
def decrypt(self, data, password):
288
passphrase = self.password_encode(password)
289
with tempfile.NamedTemporaryFile(
290
dir=self.tempdir) as passfile:
291
passfile.write(passphrase)
293
proc = subprocess.Popen([self.gpg, '--decrypt',
297
stdin=subprocess.PIPE,
298
stdout=subprocess.PIPE,
299
stderr=subprocess.PIPE)
300
decrypted_plaintext, err = proc.communicate(input=data)
301
if proc.returncode != 0:
198
self.gnupg.passphrase = self.password_encode(password)
199
with open(os.devnull, "w") as devnull:
201
proc = self.gnupg.run(['--decrypt'],
202
create_fhs=['stdin', 'stdout'],
203
attach_fhs={'stderr': devnull})
204
with contextlib.closing(proc.handles['stdin']) as f:
206
with contextlib.closing(proc.handles['stdout']) as f:
207
decrypted_plaintext = f.read()
211
self.gnupg.passphrase = None
303
212
return decrypted_plaintext
306
# 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
313
DBUS_NAME = "org.freedesktop.Avahi"
314
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
315
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
316
DBUS_PATH_SERVER = "/"
319
def string_array_to_txt_array(t):
320
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
321
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
332
215
class AvahiError(Exception):
333
216
def __init__(self, value, *args, **kwargs):
334
217
self.value = value
335
return super(AvahiError, self).__init__(value, *args,
218
super(AvahiError, self).__init__(value, *args, **kwargs)
219
def __unicode__(self):
220
return unicode(repr(self.value))
339
222
class AvahiServiceError(AvahiError):
343
225
class AvahiGroupError(AvahiError):
229
class AvahiService(object):
348
230
"""An Avahi (Zeroconf) service.
351
233
interface: integer; avahi.IF_UNSPEC or an interface index.
352
234
Used to optionally bind to the specified interface.
353
235
name: string; Example: 'Mandos'
354
236
type: string; Example: '_mandos._tcp'.
355
See <https://www.iana.org/assignments/service-names-port-numbers>
237
See <http://www.dns-sd.org/ServiceTypes.html>
356
238
port: integer; what port to announce
357
239
TXT: list of strings; TXT record for the service
358
240
domain: string; Domain to publish on, default to .local if empty.
517
377
follow_name_owner_changes=True),
518
378
avahi.DBUS_INTERFACE_SERVER)
519
379
self.server.connect_to_signal("StateChanged",
520
self.server_state_changed)
380
self.server_state_changed)
521
381
self.server_state_changed(self.server.GetState())
524
384
class AvahiServiceToSyslog(AvahiService):
525
def rename(self, *args, **kwargs):
526
386
"""Add the new name to the syslog messages"""
527
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
528
syslogger.setFormatter(logging.Formatter(
529
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
387
ret = AvahiService.rename(self)
388
syslogger.setFormatter(logging.Formatter
389
('Mandos ({0}) [%(process)d]:'
390
' %(levelname)s: %(message)s'
534
# Pretend that we have a GnuTLS module
536
"""This isn't so much a class as it is a module-like namespace."""
538
library = ctypes.util.find_library("gnutls")
540
library = ctypes.util.find_library("gnutls-deb0")
541
_library = ctypes.cdll.LoadLibrary(library)
544
# Unless otherwise indicated, the constants and types below are
545
# all from the gnutls/gnutls.h C header file.
556
E_NO_CERTIFICATE_FOUND = -49
561
KEYID_USE_SHA256 = 1 # gnutls/x509.h
562
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
565
class session_int(ctypes.Structure):
567
session_t = ctypes.POINTER(session_int)
569
class certificate_credentials_st(ctypes.Structure):
571
certificate_credentials_t = ctypes.POINTER(
572
certificate_credentials_st)
573
certificate_type_t = ctypes.c_int
575
class datum_t(ctypes.Structure):
576
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
577
('size', ctypes.c_uint)]
579
class openpgp_crt_int(ctypes.Structure):
581
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
582
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
583
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
584
credentials_type_t = ctypes.c_int
585
transport_ptr_t = ctypes.c_void_p
586
close_request_t = ctypes.c_int
589
class Error(Exception):
590
def __init__(self, message=None, code=None, args=()):
591
# Default usage is by a message string, but if a return
592
# code is passed, convert it to a string with
595
if message is None and code is not None:
596
message = gnutls.strerror(code)
597
return super(gnutls.Error, self).__init__(
600
class CertificateSecurityError(Error):
606
self._c_object = gnutls.certificate_credentials_t()
607
gnutls.certificate_allocate_credentials(
608
ctypes.byref(self._c_object))
609
self.type = gnutls.CRD_CERTIFICATE
612
gnutls.certificate_free_credentials(self._c_object)
615
def __init__(self, socket, credentials=None):
616
self._c_object = gnutls.session_t()
617
gnutls_flags = gnutls.CLIENT
618
if gnutls.check_version(b"3.5.6"):
619
gnutls_flags |= gnutls.NO_TICKETS
621
gnutls_flags |= gnutls.ENABLE_RAWPK
622
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
624
gnutls.set_default_priority(self._c_object)
625
gnutls.transport_set_ptr(self._c_object, socket.fileno())
626
gnutls.handshake_set_private_extensions(self._c_object,
629
if credentials is None:
630
credentials = gnutls.Credentials()
631
gnutls.credentials_set(self._c_object, credentials.type,
632
ctypes.cast(credentials._c_object,
634
self.credentials = credentials
637
gnutls.deinit(self._c_object)
640
return gnutls.handshake(self._c_object)
642
def send(self, data):
646
data_len -= gnutls.record_send(self._c_object,
651
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
653
# Error handling functions
654
def _error_code(result):
655
"""A function to raise exceptions on errors, suitable
656
for the 'restype' attribute on ctypes functions"""
659
if result == gnutls.E_NO_CERTIFICATE_FOUND:
660
raise gnutls.CertificateSecurityError(code=result)
661
raise gnutls.Error(code=result)
663
def _retry_on_error(result, func, arguments):
664
"""A function to retry on some errors, suitable
665
for the 'errcheck' attribute on ctypes functions"""
667
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
668
return _error_code(result)
669
result = func(*arguments)
672
# Unless otherwise indicated, the function declarations below are
673
# all from the gnutls/gnutls.h C header file.
676
priority_set_direct = _library.gnutls_priority_set_direct
677
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
678
ctypes.POINTER(ctypes.c_char_p)]
679
priority_set_direct.restype = _error_code
681
init = _library.gnutls_init
682
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
683
init.restype = _error_code
685
set_default_priority = _library.gnutls_set_default_priority
686
set_default_priority.argtypes = [session_t]
687
set_default_priority.restype = _error_code
689
record_send = _library.gnutls_record_send
690
record_send.argtypes = [session_t, ctypes.c_void_p,
692
record_send.restype = ctypes.c_ssize_t
693
record_send.errcheck = _retry_on_error
695
certificate_allocate_credentials = (
696
_library.gnutls_certificate_allocate_credentials)
697
certificate_allocate_credentials.argtypes = [
698
ctypes.POINTER(certificate_credentials_t)]
699
certificate_allocate_credentials.restype = _error_code
701
certificate_free_credentials = (
702
_library.gnutls_certificate_free_credentials)
703
certificate_free_credentials.argtypes = [
704
certificate_credentials_t]
705
certificate_free_credentials.restype = None
707
handshake_set_private_extensions = (
708
_library.gnutls_handshake_set_private_extensions)
709
handshake_set_private_extensions.argtypes = [session_t,
711
handshake_set_private_extensions.restype = None
713
credentials_set = _library.gnutls_credentials_set
714
credentials_set.argtypes = [session_t, credentials_type_t,
716
credentials_set.restype = _error_code
718
strerror = _library.gnutls_strerror
719
strerror.argtypes = [ctypes.c_int]
720
strerror.restype = ctypes.c_char_p
722
certificate_type_get = _library.gnutls_certificate_type_get
723
certificate_type_get.argtypes = [session_t]
724
certificate_type_get.restype = _error_code
726
certificate_get_peers = _library.gnutls_certificate_get_peers
727
certificate_get_peers.argtypes = [session_t,
728
ctypes.POINTER(ctypes.c_uint)]
729
certificate_get_peers.restype = ctypes.POINTER(datum_t)
731
global_set_log_level = _library.gnutls_global_set_log_level
732
global_set_log_level.argtypes = [ctypes.c_int]
733
global_set_log_level.restype = None
735
global_set_log_function = _library.gnutls_global_set_log_function
736
global_set_log_function.argtypes = [log_func]
737
global_set_log_function.restype = None
739
deinit = _library.gnutls_deinit
740
deinit.argtypes = [session_t]
741
deinit.restype = None
743
handshake = _library.gnutls_handshake
744
handshake.argtypes = [session_t]
745
handshake.restype = _error_code
746
handshake.errcheck = _retry_on_error
748
transport_set_ptr = _library.gnutls_transport_set_ptr
749
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
750
transport_set_ptr.restype = None
752
bye = _library.gnutls_bye
753
bye.argtypes = [session_t, close_request_t]
754
bye.restype = _error_code
755
bye.errcheck = _retry_on_error
757
check_version = _library.gnutls_check_version
758
check_version.argtypes = [ctypes.c_char_p]
759
check_version.restype = ctypes.c_char_p
761
_need_version = b"3.3.0"
762
if check_version(_need_version) is None:
763
raise self.Error("Needs GnuTLS {} or later"
764
.format(_need_version))
766
_tls_rawpk_version = b"3.6.6"
767
has_rawpk = bool(check_version(_tls_rawpk_version))
771
class pubkey_st(ctypes.Structure):
773
pubkey_t = ctypes.POINTER(pubkey_st)
775
x509_crt_fmt_t = ctypes.c_int
777
# All the function declarations below are from gnutls/abstract.h
778
pubkey_init = _library.gnutls_pubkey_init
779
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
780
pubkey_init.restype = _error_code
782
pubkey_import = _library.gnutls_pubkey_import
783
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
785
pubkey_import.restype = _error_code
787
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
788
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
789
ctypes.POINTER(ctypes.c_ubyte),
790
ctypes.POINTER(ctypes.c_size_t)]
791
pubkey_get_key_id.restype = _error_code
793
pubkey_deinit = _library.gnutls_pubkey_deinit
794
pubkey_deinit.argtypes = [pubkey_t]
795
pubkey_deinit.restype = None
797
# All the function declarations below are from gnutls/openpgp.h
799
openpgp_crt_init = _library.gnutls_openpgp_crt_init
800
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
801
openpgp_crt_init.restype = _error_code
803
openpgp_crt_import = _library.gnutls_openpgp_crt_import
804
openpgp_crt_import.argtypes = [openpgp_crt_t,
805
ctypes.POINTER(datum_t),
807
openpgp_crt_import.restype = _error_code
809
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
810
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
811
ctypes.POINTER(ctypes.c_uint)]
812
openpgp_crt_verify_self.restype = _error_code
814
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
815
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
816
openpgp_crt_deinit.restype = None
818
openpgp_crt_get_fingerprint = (
819
_library.gnutls_openpgp_crt_get_fingerprint)
820
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
824
openpgp_crt_get_fingerprint.restype = _error_code
826
if check_version(b"3.6.4"):
827
certificate_type_get2 = _library.gnutls_certificate_type_get2
828
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
829
certificate_type_get2.restype = _error_code
831
# Remove non-public functions
832
del _error_code, _retry_on_error
835
def call_pipe(connection, # : multiprocessing.Connection
836
func, *args, **kwargs):
837
"""This function is meant to be called by multiprocessing.Process
839
This function runs func(*args, **kwargs), and writes the resulting
840
return value on the provided multiprocessing.Connection.
842
connection.send(func(*args, **kwargs))
395
def timedelta_to_milliseconds(td):
396
"Convert a datetime.timedelta() to milliseconds"
397
return ((td.days * 24 * 60 * 60 * 1000)
398
+ (td.seconds * 1000)
399
+ (td.microseconds // 1000))
402
class Client(object):
847
403
"""A representation of a client host served by this server.
850
406
approved: bool(); 'None' if not yet approved/disapproved
851
407
approval_delay: datetime.timedelta(); Time to wait for approval
852
408
approval_duration: datetime.timedelta(); Duration of one approval
853
checker: multiprocessing.Process(); a running checker process used
854
to see if the client lives. 'None' if no process is
856
checker_callback_tag: a GLib event source tag, or None
409
checker: subprocess.Popen(); a running checker process used
410
to see if the client lives.
411
'None' if no process is running.
412
checker_callback_tag: a gobject event source tag, or None
857
413
checker_command: string; External command which is run to check
858
414
if client lives. %() expansions are done at
859
415
runtime with vars(self) as dict, so that for
860
416
instance %(name)s can be used in the command.
861
checker_initiator_tag: a GLib event source tag, or None
417
checker_initiator_tag: a gobject event source tag, or None
862
418
created: datetime.datetime(); (UTC) object creation
863
419
client_structure: Object describing what attributes a client has
864
420
and is used for storing the client at exit
865
421
current_checker_command: string; current running checker_command
866
disable_initiator_tag: a GLib event source tag, or None
422
disable_initiator_tag: a gobject event source tag, or None
868
424
fingerprint: string (40 or 32 hexadecimal digits); used to
869
uniquely identify an OpenPGP client
870
key_id: string (64 hexadecimal digits); used to uniquely identify
871
a client using raw public keys
425
uniquely identify the client
872
426
host: string; available for use by the checker command
873
427
interval: datetime.timedelta(); How often to start a new checker
874
428
last_approval_request: datetime.datetime(); (UTC) or None
1031
591
logger.info("Disabling client %s", self.name)
1032
592
if getattr(self, "disable_initiator_tag", None) is not None:
1033
GLib.source_remove(self.disable_initiator_tag)
593
gobject.source_remove(self.disable_initiator_tag)
1034
594
self.disable_initiator_tag = None
1035
595
self.expires = None
1036
596
if getattr(self, "checker_initiator_tag", None) is not None:
1037
GLib.source_remove(self.checker_initiator_tag)
597
gobject.source_remove(self.checker_initiator_tag)
1038
598
self.checker_initiator_tag = None
1039
599
self.stop_checker()
1040
600
self.enabled = False
1042
602
self.send_changedstate()
1043
# Do not run this again if called by a GLib.timeout_add
603
# Do not run this again if called by a gobject.timeout_add
1046
606
def __del__(self):
1049
609
def init_checker(self):
1050
610
# Schedule a new checker to be started an 'interval' from now,
1051
611
# and every interval from then on.
1052
612
if self.checker_initiator_tag is not None:
1053
GLib.source_remove(self.checker_initiator_tag)
1054
self.checker_initiator_tag = GLib.timeout_add(
1055
random.randrange(int(self.interval.total_seconds() * 1000
613
gobject.source_remove(self.checker_initiator_tag)
614
self.checker_initiator_tag = (gobject.timeout_add
615
(self.interval_milliseconds(),
1058
617
# Schedule a disable() when 'timeout' has passed
1059
618
if self.disable_initiator_tag is not None:
1060
GLib.source_remove(self.disable_initiator_tag)
1061
self.disable_initiator_tag = GLib.timeout_add(
1062
int(self.timeout.total_seconds() * 1000), self.disable)
619
gobject.source_remove(self.disable_initiator_tag)
620
self.disable_initiator_tag = (gobject.timeout_add
621
(self.timeout_milliseconds(),
1063
623
# Also start a new checker *right now*.
1064
624
self.start_checker()
1066
def checker_callback(self, source, condition, connection,
626
def checker_callback(self, pid, condition, command):
1068
627
"""The checker has completed, so take appropriate actions."""
1069
# Read return code from connection (see call_pipe)
1070
returncode = connection.recv()
1072
if self.checker is not None:
1074
628
self.checker_callback_tag = None
1075
629
self.checker = None
1078
self.last_checker_status = returncode
1079
self.last_checker_signal = None
630
if os.WIFEXITED(condition):
631
self.last_checker_status = os.WEXITSTATUS(condition)
1080
632
if self.last_checker_status == 0:
1081
633
logger.info("Checker for %(name)s succeeded",
1083
635
self.checked_ok()
1085
logger.info("Checker for %(name)s failed", vars(self))
637
logger.info("Checker for %(name)s failed",
1087
640
self.last_checker_status = -1
1088
self.last_checker_signal = -returncode
1089
641
logger.warning("Checker for %(name)s crashed?",
1093
644
def checked_ok(self):
1094
645
"""Assert that the client has been seen, alive and well."""
1095
646
self.last_checked_ok = datetime.datetime.utcnow()
1096
647
self.last_checker_status = 0
1097
self.last_checker_signal = None
1098
648
self.bump_timeout()
1100
650
def bump_timeout(self, timeout=None):
1101
651
"""Bump up the timeout for this client."""
1102
652
if timeout is None:
1103
653
timeout = self.timeout
1104
654
if self.disable_initiator_tag is not None:
1105
GLib.source_remove(self.disable_initiator_tag)
655
gobject.source_remove(self.disable_initiator_tag)
1106
656
self.disable_initiator_tag = None
1107
657
if getattr(self, "enabled", False):
1108
self.disable_initiator_tag = GLib.timeout_add(
1109
int(timeout.total_seconds() * 1000), self.disable)
658
self.disable_initiator_tag = (gobject.timeout_add
659
(timedelta_to_milliseconds
660
(timeout), self.disable))
1110
661
self.expires = datetime.datetime.utcnow() + timeout
1112
663
def need_approval(self):
1113
664
self.last_approval_request = datetime.datetime.utcnow()
1115
666
def start_checker(self):
1116
667
"""Start a new checker subprocess if one is not running.
1118
669
If a checker already exists, leave it running and do
1120
671
# The reason for not killing a running checker is that if we
1125
676
# checkers alone, the checker would have to take more time
1126
677
# than 'timeout' for the client to be disabled, which is as it
1129
if self.checker is not None and not self.checker.is_alive():
1130
logger.warning("Checker was not alive; joining")
680
# If a checker exists, make sure it is not a zombie
682
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
683
except (AttributeError, OSError) as error:
684
if (isinstance(error, OSError)
685
and error.errno != errno.ECHILD):
689
logger.warning("Checker was a zombie")
690
gobject.source_remove(self.checker_callback_tag)
691
self.checker_callback(pid, status,
692
self.current_checker_command)
1133
693
# Start a new checker if needed
1134
694
if self.checker is None:
1135
695
# Escape attributes for the shell
1137
attr: shlex.quote(str(getattr(self, attr)))
1138
for attr in self.runtime_expansions}
696
escaped_attrs = dict(
697
(attr, re.escape(unicode(getattr(self, attr))))
699
self.runtime_expansions)
1140
701
command = self.checker_command % escaped_attrs
1141
702
except TypeError as error:
1142
703
logger.error('Could not format string "%s"',
1143
self.checker_command,
704
self.checker_command, exc_info=error)
705
return True # Try again later
706
self.current_checker_command = command
708
logger.info("Starting checker %r for %s",
710
# We don't need to redirect stdout and stderr, since
711
# in normal mode, that is already done by daemon(),
712
# and in debug mode we don't want to. (Stdin is
713
# always replaced by /dev/null.)
714
self.checker = subprocess.Popen(command,
717
except OSError as error:
718
logger.error("Failed to start subprocess",
1145
return True # Try again later
1146
self.current_checker_command = command
1147
logger.info("Starting checker %r for %s", command,
1149
# We don't need to redirect stdout and stderr, since
1150
# in normal mode, that is already done by daemon(),
1151
# and in debug mode we don't want to. (Stdin is
1152
# always replaced by /dev/null.)
1153
# The exception is when not debugging but nevertheless
1154
# running in the foreground; use the previously
1156
popen_args = {"close_fds": True,
1159
if (not self.server_settings["debug"]
1160
and self.server_settings["foreground"]):
1161
popen_args.update({"stdout": wnull,
1163
pipe = multiprocessing.Pipe(duplex=False)
1164
self.checker = multiprocessing.Process(
1166
args=(pipe[1], subprocess.call, command),
1168
self.checker.start()
1169
self.checker_callback_tag = GLib.io_add_watch(
1170
GLib.IOChannel.unix_new(pipe[0].fileno()),
1171
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
1172
self.checker_callback, pipe[0], command)
1173
# Re-run this periodically if run by GLib.timeout_add
721
self.checker_callback_tag = (gobject.child_watch_add
723
self.checker_callback,
725
# The checker may have completed before the gobject
726
# watch was added. Check for this.
728
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
729
except OSError as error:
730
if error.errno == errno.ECHILD:
731
# This should never happen
732
logger.error("Child process vanished",
737
gobject.source_remove(self.checker_callback_tag)
738
self.checker_callback(pid, status, command)
739
# Re-run this periodically if run by gobject.timeout_add
1176
742
def stop_checker(self):
1177
743
"""Force the checker process, if any, to stop."""
1178
744
if self.checker_callback_tag:
1179
GLib.source_remove(self.checker_callback_tag)
745
gobject.source_remove(self.checker_callback_tag)
1180
746
self.checker_callback_tag = None
1181
747
if getattr(self, "checker", None) is None:
1183
749
logger.debug("Stopping checker for %(name)s", vars(self))
1184
self.checker.terminate()
751
self.checker.terminate()
753
#if self.checker.poll() is None:
754
# self.checker.kill()
755
except OSError as error:
756
if error.errno != errno.ESRCH: # No such process
1185
758
self.checker = None
1188
def dbus_service_property(dbus_interface,
761
def dbus_service_property(dbus_interface, signature="v",
762
access="readwrite", byte_arrays=False):
1192
763
"""Decorators for marking methods of a DBusObjectWithProperties to
1193
764
become properties on the D-Bus.
1195
766
The decorated method will be called with no arguments by "Get"
1196
767
and with one argument by "Set".
1198
769
The parameters, where they are supported, are the same as
1199
770
dbus.service.method, except there is only "signature", since the
1200
771
type from Get() and the type sent to Set() is the same.
1283
class DBusObjectWithAnnotations(dbus.service.Object):
1284
"""A D-Bus object with annotations.
1286
Classes inheriting from this can use the dbus_annotations
1287
decorator to add annotations to methods or signals.
847
class DBusObjectWithProperties(dbus.service.Object):
848
"""A D-Bus object with properties.
850
Classes inheriting from this can use the dbus_service_property
851
decorator to expose methods as D-Bus properties. It exposes the
852
standard Get(), Set(), and GetAll() methods on the D-Bus.
1291
856
def _is_dbus_thing(thing):
1292
857
"""Returns a function testing if an attribute is a D-Bus thing
1294
859
If called like _is_dbus_thing("method") it returns a function
1295
860
suitable for use as predicate to inspect.getmembers().
1297
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
862
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
1300
865
def _get_all_dbus_things(self, thing):
1301
866
"""Returns a generator of (name, attribute) pairs
1303
return ((getattr(athing.__get__(self), "_dbus_name", name),
868
return ((getattr(athing.__get__(self), "_dbus_name",
1304
870
athing.__get__(self))
1305
871
for cls in self.__class__.__mro__
1306
872
for name, athing in
1307
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1309
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1311
path_keyword='object_path',
1312
connection_keyword='connection')
1313
def Introspect(self, object_path, connection):
1314
"""Overloading of standard D-Bus method.
1316
Inserts annotation tags on methods and signals.
1318
xmlstring = dbus.service.Object.Introspect(self, object_path,
1321
document = xml.dom.minidom.parseString(xmlstring)
1323
for if_tag in document.getElementsByTagName("interface"):
1324
# Add annotation tags
1325
for typ in ("method", "signal"):
1326
for tag in if_tag.getElementsByTagName(typ):
1328
for name, prop in (self.
1329
_get_all_dbus_things(typ)):
1330
if (name == tag.getAttribute("name")
1331
and prop._dbus_interface
1332
== if_tag.getAttribute("name")):
1333
annots.update(getattr(
1334
prop, "_dbus_annotations", {}))
1335
for name, value in annots.items():
1336
ann_tag = document.createElement(
1338
ann_tag.setAttribute("name", name)
1339
ann_tag.setAttribute("value", value)
1340
tag.appendChild(ann_tag)
1341
# Add interface annotation tags
1342
for annotation, value in dict(
1343
itertools.chain.from_iterable(
1344
annotations().items()
1345
for name, annotations
1346
in self._get_all_dbus_things("interface")
1347
if name == if_tag.getAttribute("name")
1349
ann_tag = document.createElement("annotation")
1350
ann_tag.setAttribute("name", annotation)
1351
ann_tag.setAttribute("value", value)
1352
if_tag.appendChild(ann_tag)
1353
# Fix argument name for the Introspect method itself
1354
if (if_tag.getAttribute("name")
1355
== dbus.INTROSPECTABLE_IFACE):
1356
for cn in if_tag.getElementsByTagName("method"):
1357
if cn.getAttribute("name") == "Introspect":
1358
for arg in cn.getElementsByTagName("arg"):
1359
if (arg.getAttribute("direction")
1361
arg.setAttribute("name",
1363
xmlstring = document.toxml("utf-8")
1365
except (AttributeError, xml.dom.DOMException,
1366
xml.parsers.expat.ExpatError) as error:
1367
logger.error("Failed to override Introspection method",
1372
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1373
"""A D-Bus object with properties.
1375
Classes inheriting from this can use the dbus_service_property
1376
decorator to expose methods as D-Bus properties. It exposes the
1377
standard Get(), Set(), and GetAll() methods on the D-Bus.
873
inspect.getmembers(cls,
874
self._is_dbus_thing(thing)))
1380
876
def _get_dbus_property(self, interface_name, property_name):
1381
877
"""Returns a bound method if one exists which is a D-Bus
1382
878
property with the specified name and interface.
1384
for cls in self.__class__.__mro__:
1385
for name, value in inspect.getmembers(
1386
cls, self._is_dbus_thing("property")):
880
for cls in self.__class__.__mro__:
881
for name, value in (inspect.getmembers
883
self._is_dbus_thing("property"))):
1387
884
if (value._dbus_name == property_name
1388
885
and value._dbus_interface == interface_name):
1389
886
return value.__get__(self)
1391
888
# No such property
1392
raise DBusPropertyNotFound("{}:{}.{}".format(
1393
self.dbus_object_path, interface_name, property_name))
1396
def _get_all_interface_names(cls):
1397
"""Get a sequence of all interfaces supported by an object"""
1398
return (name for name in set(getattr(getattr(x, attr),
1399
"_dbus_interface", None)
1400
for x in (inspect.getmro(cls))
1402
if name is not None)
1404
@dbus.service.method(dbus.PROPERTIES_IFACE,
889
raise DBusPropertyNotFound(self.dbus_object_path + ":"
890
+ interface_name + "."
893
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1406
894
out_signature="v")
1407
895
def Get(self, interface_name, property_name):
1408
896
"""Standard D-Bus property Get() method, see D-Bus standard.
1536
1026
return xmlstring
1540
dbus.OBJECT_MANAGER_IFACE
1541
except AttributeError:
1542
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1545
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1546
"""A D-Bus object with an ObjectManager.
1548
Classes inheriting from this exposes the standard
1549
GetManagedObjects call and the InterfacesAdded and
1550
InterfacesRemoved signals on the standard
1551
"org.freedesktop.DBus.ObjectManager" interface.
1553
Note: No signals are sent automatically; they must be sent
1556
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1557
out_signature="a{oa{sa{sv}}}")
1558
def GetManagedObjects(self):
1559
"""This function must be overridden"""
1560
raise NotImplementedError()
1562
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1563
signature="oa{sa{sv}}")
1564
def InterfacesAdded(self, object_path, interfaces_and_properties):
1567
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1568
def InterfacesRemoved(self, object_path, interfaces):
1571
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1573
path_keyword='object_path',
1574
connection_keyword='connection')
1575
def Introspect(self, object_path, connection):
1576
"""Overloading of standard D-Bus method.
1578
Override return argument name of GetManagedObjects to be
1579
"objpath_interfaces_and_properties"
1581
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1585
document = xml.dom.minidom.parseString(xmlstring)
1587
for if_tag in document.getElementsByTagName("interface"):
1588
# Fix argument name for the GetManagedObjects method
1589
if (if_tag.getAttribute("name")
1590
== dbus.OBJECT_MANAGER_IFACE):
1591
for cn in if_tag.getElementsByTagName("method"):
1592
if (cn.getAttribute("name")
1593
== "GetManagedObjects"):
1594
for arg in cn.getElementsByTagName("arg"):
1595
if (arg.getAttribute("direction")
1599
"objpath_interfaces"
1601
xmlstring = document.toxml("utf-8")
1603
except (AttributeError, xml.dom.DOMException,
1604
xml.parsers.expat.ExpatError) as error:
1605
logger.error("Failed to override Introspection method",
1610
1029
def datetime_to_dbus(dt, variant_level=0):
1611
1030
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1613
return dbus.String("", variant_level=variant_level)
1614
return dbus.String(dt.isoformat(), variant_level=variant_level)
1032
return dbus.String("", variant_level = variant_level)
1033
return dbus.String(dt.isoformat(),
1034
variant_level=variant_level)
1617
1037
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1978
1390
server to mandos-client
1982
1394
# Rejected - signal
1983
1395
@dbus.service.signal(_interface, signature="s")
1984
1396
def Rejected(self, reason):
1988
1400
# NeedApproval - signal
1989
1401
@dbus.service.signal(_interface, signature="tb")
1990
1402
def NeedApproval(self, timeout, default):
1992
1404
return self.need_approval()
1996
1408
# Approve - method
1997
1409
@dbus.service.method(_interface, in_signature="b")
1998
1410
def Approve(self, value):
1999
1411
self.approve(value)
2001
1413
# CheckedOK - method
2002
1414
@dbus.service.method(_interface)
2003
1415
def CheckedOK(self):
2004
1416
self.checked_ok()
2006
1418
# Enable - method
2007
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2008
1419
@dbus.service.method(_interface)
2009
1420
def Enable(self):
2013
1424
# StartChecker - method
2014
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2015
1425
@dbus.service.method(_interface)
2016
1426
def StartChecker(self):
2018
1428
self.start_checker()
2020
1430
# Disable - method
2021
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2022
1431
@dbus.service.method(_interface)
2023
1432
def Disable(self):
2027
1436
# StopChecker - method
2028
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2029
1437
@dbus.service.method(_interface)
2030
1438
def StopChecker(self):
2031
1439
self.stop_checker()
2035
1443
# ApprovalPending - property
2036
1444
@dbus_service_property(_interface, signature="b", access="read")
2037
1445
def ApprovalPending_dbus_property(self):
2038
1446
return dbus.Boolean(bool(self.approvals_pending))
2040
1448
# ApprovedByDefault - property
2041
@dbus_service_property(_interface,
1449
@dbus_service_property(_interface, signature="b",
2043
1450
access="readwrite")
2044
1451
def ApprovedByDefault_dbus_property(self, value=None):
2045
1452
if value is None: # get
2046
1453
return dbus.Boolean(self.approved_by_default)
2047
1454
self.approved_by_default = bool(value)
2049
1456
# ApprovalDelay - property
2050
@dbus_service_property(_interface,
1457
@dbus_service_property(_interface, signature="t",
2052
1458
access="readwrite")
2053
1459
def ApprovalDelay_dbus_property(self, value=None):
2054
1460
if value is None: # get
2055
return dbus.UInt64(self.approval_delay.total_seconds()
1461
return dbus.UInt64(self.approval_delay_milliseconds())
2057
1462
self.approval_delay = datetime.timedelta(0, 0, 0, value)
2059
1464
# ApprovalDuration - property
2060
@dbus_service_property(_interface,
1465
@dbus_service_property(_interface, signature="t",
2062
1466
access="readwrite")
2063
1467
def ApprovalDuration_dbus_property(self, value=None):
2064
1468
if value is None: # get
2065
return dbus.UInt64(self.approval_duration.total_seconds()
1469
return dbus.UInt64(timedelta_to_milliseconds(
1470
self.approval_duration))
2067
1471
self.approval_duration = datetime.timedelta(0, 0, 0, value)
2069
1473
# Name - property
2071
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2072
1474
@dbus_service_property(_interface, signature="s", access="read")
2073
1475
def Name_dbus_property(self):
2074
1476
return dbus.String(self.name)
2078
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2079
@dbus_service_property(_interface, signature="s", access="read")
2080
def KeyID_dbus_property(self):
2081
return dbus.String(self.key_id)
2083
1478
# Fingerprint - property
2085
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2086
1479
@dbus_service_property(_interface, signature="s", access="read")
2087
1480
def Fingerprint_dbus_property(self):
2088
1481
return dbus.String(self.fingerprint)
2090
1483
# Host - property
2091
@dbus_service_property(_interface,
1484
@dbus_service_property(_interface, signature="s",
2093
1485
access="readwrite")
2094
1486
def Host_dbus_property(self, value=None):
2095
1487
if value is None: # get
2096
1488
return dbus.String(self.host)
2097
self.host = str(value)
1489
self.host = unicode(value)
2099
1491
# Created - property
2101
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2102
1492
@dbus_service_property(_interface, signature="s", access="read")
2103
1493
def Created_dbus_property(self):
2104
1494
return datetime_to_dbus(self.created)
2106
1496
# LastEnabled - property
2107
1497
@dbus_service_property(_interface, signature="s", access="read")
2108
1498
def LastEnabled_dbus_property(self):
2109
1499
return datetime_to_dbus(self.last_enabled)
2111
1501
# Enabled - property
2112
@dbus_service_property(_interface,
1502
@dbus_service_property(_interface, signature="b",
2114
1503
access="readwrite")
2115
1504
def Enabled_dbus_property(self, value=None):
2116
1505
if value is None: # get
2165
1553
if (getattr(self, "disable_initiator_tag", None)
2168
GLib.source_remove(self.disable_initiator_tag)
2169
self.disable_initiator_tag = GLib.timeout_add(
2170
int((self.expires - now).total_seconds() * 1000),
1556
gobject.source_remove(self.disable_initiator_tag)
1557
self.disable_initiator_tag = (
1558
gobject.timeout_add(
1559
timedelta_to_milliseconds(self.expires - now),
2173
1562
# ExtendedTimeout - property
2174
@dbus_service_property(_interface,
1563
@dbus_service_property(_interface, signature="t",
2176
1564
access="readwrite")
2177
1565
def ExtendedTimeout_dbus_property(self, value=None):
2178
1566
if value is None: # get
2179
return dbus.UInt64(self.extended_timeout.total_seconds()
1567
return dbus.UInt64(self.extended_timeout_milliseconds())
2181
1568
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2183
1570
# Interval - property
2184
@dbus_service_property(_interface,
1571
@dbus_service_property(_interface, signature="t",
2186
1572
access="readwrite")
2187
1573
def Interval_dbus_property(self, value=None):
2188
1574
if value is None: # get
2189
return dbus.UInt64(self.interval.total_seconds() * 1000)
1575
return dbus.UInt64(self.interval_milliseconds())
2190
1576
self.interval = datetime.timedelta(0, 0, 0, value)
2191
1577
if getattr(self, "checker_initiator_tag", None) is None:
2193
1579
if self.enabled:
2194
1580
# Reschedule checker run
2195
GLib.source_remove(self.checker_initiator_tag)
2196
self.checker_initiator_tag = GLib.timeout_add(
2197
value, self.start_checker)
2198
self.start_checker() # Start one now, too
1581
gobject.source_remove(self.checker_initiator_tag)
1582
self.checker_initiator_tag = (gobject.timeout_add
1583
(value, self.start_checker))
1584
self.start_checker() # Start one now, too
2200
1586
# Checker - property
2201
@dbus_service_property(_interface,
1587
@dbus_service_property(_interface, signature="s",
2203
1588
access="readwrite")
2204
1589
def Checker_dbus_property(self, value=None):
2205
1590
if value is None: # get
2206
1591
return dbus.String(self.checker_command)
2207
self.checker_command = str(value)
1592
self.checker_command = unicode(value)
2209
1594
# CheckerRunning - property
2210
@dbus_service_property(_interface,
1595
@dbus_service_property(_interface, signature="b",
2212
1596
access="readwrite")
2213
1597
def CheckerRunning_dbus_property(self, value=None):
2214
1598
if value is None: # get
2271
1645
class ClientHandler(socketserver.BaseRequestHandler, object):
2272
1646
"""A class to handle client connections.
2274
1648
Instantiated once for each connection to handle it.
2275
1649
Note: This will run in its own forked process."""
2277
1651
def handle(self):
2278
1652
with contextlib.closing(self.server.child_pipe) as child_pipe:
2279
1653
logger.info("TCP connection from: %s",
2280
str(self.client_address))
1654
unicode(self.client_address))
2281
1655
logger.debug("Pipe FD: %d",
2282
1656
self.server.child_pipe.fileno())
2284
session = gnutls.ClientSession(self.request)
2286
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2287
# "+AES-256-CBC", "+SHA1",
2288
# "+COMP-NULL", "+CTYPE-OPENPGP",
1658
session = (gnutls.connection
1659
.ClientSession(self.request,
1661
.X509Credentials()))
1663
# Note: gnutls.connection.X509Credentials is really a
1664
# generic GnuTLS certificate credentials object so long as
1665
# no X.509 keys are added to it. Therefore, we can use it
1666
# here despite using OpenPGP certificates.
1668
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1669
# "+AES-256-CBC", "+SHA1",
1670
# "+COMP-NULL", "+CTYPE-OPENPGP",
2290
1672
# Use a fallback default, since this MUST be set.
2291
1673
priority = self.server.gnutls_priority
2292
1674
if priority is None:
2293
1675
priority = "NORMAL"
2294
gnutls.priority_set_direct(session._c_object,
2295
priority.encode("utf-8"),
1676
(gnutls.library.functions
1677
.gnutls_priority_set_direct(session._c_object,
2298
1680
# Start communication using the Mandos protocol
2299
1681
# Get protocol number
2300
1682
line = self.request.makefile().readline()
2301
1683
logger.debug("Protocol version: %r", line)
2303
1685
if int(line.strip().split()[0]) > 1:
2304
raise RuntimeError(line)
2305
1687
except (ValueError, IndexError, RuntimeError) as error:
2306
1688
logger.error("Unknown protocol version: %s", error)
2309
1691
# Start GnuTLS connection
2311
1693
session.handshake()
2312
except gnutls.Error as error:
1694
except gnutls.errors.GNUTLSError as error:
2313
1695
logger.warning("Handshake failed: %s", error)
2314
1696
# Do not run session.bye() here: the session is not
2315
1697
# established. Just abandon the request.
2317
1699
logger.debug("Handshake succeeded")
2319
1701
approval_required = False
2321
if gnutls.has_rawpk:
2324
key_id = self.key_id(
2325
self.peer_certificate(session))
2326
except (TypeError, gnutls.Error) as error:
2327
logger.warning("Bad certificate: %s", error)
2329
logger.debug("Key ID: %s", key_id)
2334
fpr = self.fingerprint(
2335
self.peer_certificate(session))
2336
except (TypeError, gnutls.Error) as error:
2337
logger.warning("Bad certificate: %s", error)
2339
logger.debug("Fingerprint: %s", fpr)
2342
client = ProxyClient(child_pipe, key_id, fpr,
1704
fpr = self.fingerprint(self.peer_certificate
1707
gnutls.errors.GNUTLSError) as error:
1708
logger.warning("Bad certificate: %s", error)
1710
logger.debug("Fingerprint: %s", fpr)
1713
client = ProxyClient(child_pipe, fpr,
2343
1714
self.client_address)
2344
1715
except KeyError:
2347
1718
if client.approval_delay:
2348
1719
delay = client.approval_delay
2349
1720
client.approvals_pending += 1
2350
1721
approval_required = True
2353
1724
if not client.enabled:
2354
1725
logger.info("Client %s is disabled",
2356
1727
if self.server.use_dbus:
2357
1728
# Emit D-Bus signal
2358
1729
client.Rejected("Disabled")
2361
1732
if client.approved or not client.approval_delay:
2362
# We are approved or approval is disabled
1733
#We are approved or approval is disabled
2364
1735
elif client.approved is None:
2365
1736
logger.info("Client %s needs approval",
2398
1771
delay -= time2 - time
2401
session.send(client.secret)
2402
except gnutls.Error as error:
2403
logger.warning("gnutls send failed",
1774
while sent_size < len(client.secret):
1776
sent = session.send(client.secret[sent_size:])
1777
except gnutls.errors.GNUTLSError as error:
1778
logger.warning("gnutls send failed",
1781
logger.debug("Sent: %d, remaining: %d",
1782
sent, len(client.secret)
1783
- (sent_size + sent))
2407
1786
logger.info("Sending secret to %s", client.name)
2408
1787
# bump the timeout using extended_timeout
2409
1788
client.bump_timeout(client.extended_timeout)
2410
1789
if self.server.use_dbus:
2411
1790
# Emit D-Bus signal
2412
1791
client.GotSecret()
2415
1794
if approval_required:
2416
1795
client.approvals_pending -= 1
2419
except gnutls.Error as error:
1798
except gnutls.errors.GNUTLSError as error:
2420
1799
logger.warning("GnuTLS bye failed",
2421
1800
exc_info=error)
2424
1803
def peer_certificate(session):
2425
"Return the peer's certificate as a bytestring"
2427
cert_type = gnutls.certificate_type_get2(session._c_object,
2429
except AttributeError:
2430
cert_type = gnutls.certificate_type_get(session._c_object)
2431
if gnutls.has_rawpk:
2432
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2434
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2435
# If not a valid certificate type...
2436
if cert_type not in valid_cert_types:
2437
logger.info("Cert type %r not in %r", cert_type,
2439
# ...return invalid data
1804
"Return the peer's OpenPGP certificate as a bytestring"
1805
# If not an OpenPGP certificate...
1806
if (gnutls.library.functions
1807
.gnutls_certificate_type_get(session._c_object)
1808
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1809
# ...do the normal thing
1810
return session.peer_certificate
2441
1811
list_size = ctypes.c_uint(1)
2442
cert_list = (gnutls.certificate_get_peers
1812
cert_list = (gnutls.library.functions
1813
.gnutls_certificate_get_peers
2443
1814
(session._c_object, ctypes.byref(list_size)))
2444
1815
if not bool(cert_list) and list_size.value != 0:
2445
raise gnutls.Error("error getting peer certificate")
1816
raise gnutls.errors.GNUTLSError("error getting peer"
2446
1818
if list_size.value == 0:
2448
1820
cert = cert_list[0]
2449
1821
return ctypes.string_at(cert.data, cert.size)
2452
def key_id(certificate):
2453
"Convert a certificate bytestring to a hexdigit key ID"
2454
# New GnuTLS "datum" with the public key
2455
datum = gnutls.datum_t(
2456
ctypes.cast(ctypes.c_char_p(certificate),
2457
ctypes.POINTER(ctypes.c_ubyte)),
2458
ctypes.c_uint(len(certificate)))
2459
# XXX all these need to be created in the gnutls "module"
2460
# New empty GnuTLS certificate
2461
pubkey = gnutls.pubkey_t()
2462
gnutls.pubkey_init(ctypes.byref(pubkey))
2463
# Import the raw public key into the certificate
2464
gnutls.pubkey_import(pubkey,
2465
ctypes.byref(datum),
2466
gnutls.X509_FMT_DER)
2467
# New buffer for the key ID
2468
buf = ctypes.create_string_buffer(32)
2469
buf_len = ctypes.c_size_t(len(buf))
2470
# Get the key ID from the raw public key into the buffer
2471
gnutls.pubkey_get_key_id(pubkey,
2472
gnutls.KEYID_USE_SHA256,
2473
ctypes.cast(ctypes.byref(buf),
2474
ctypes.POINTER(ctypes.c_ubyte)),
2475
ctypes.byref(buf_len))
2476
# Deinit the certificate
2477
gnutls.pubkey_deinit(pubkey)
2479
# Convert the buffer to a Python bytestring
2480
key_id = ctypes.string_at(buf, buf_len.value)
2481
# Convert the bytestring to hexadecimal notation
2482
hex_key_id = binascii.hexlify(key_id).upper()
2486
1824
def fingerprint(openpgp):
2487
1825
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2488
1826
# New GnuTLS "datum" with the OpenPGP public key
2489
datum = gnutls.datum_t(
2490
ctypes.cast(ctypes.c_char_p(openpgp),
2491
ctypes.POINTER(ctypes.c_ubyte)),
2492
ctypes.c_uint(len(openpgp)))
1827
datum = (gnutls.library.types
1828
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1831
ctypes.c_uint(len(openpgp))))
2493
1832
# New empty GnuTLS certificate
2494
crt = gnutls.openpgp_crt_t()
2495
gnutls.openpgp_crt_init(ctypes.byref(crt))
1833
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1834
(gnutls.library.functions
1835
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2496
1836
# Import the OpenPGP public key into the certificate
2497
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2498
gnutls.OPENPGP_FMT_RAW)
1837
(gnutls.library.functions
1838
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1839
gnutls.library.constants
1840
.GNUTLS_OPENPGP_FMT_RAW))
2499
1841
# Verify the self signature in the key
2500
1842
crtverify = ctypes.c_uint()
2501
gnutls.openpgp_crt_verify_self(crt, 0,
2502
ctypes.byref(crtverify))
1843
(gnutls.library.functions
1844
.gnutls_openpgp_crt_verify_self(crt, 0,
1845
ctypes.byref(crtverify)))
2503
1846
if crtverify.value != 0:
2504
gnutls.openpgp_crt_deinit(crt)
2505
raise gnutls.CertificateSecurityError(code
1847
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1848
raise (gnutls.errors.CertificateSecurityError
2507
1850
# New buffer for the fingerprint
2508
1851
buf = ctypes.create_string_buffer(20)
2509
1852
buf_len = ctypes.c_size_t()
2510
1853
# Get the fingerprint from the certificate into the buffer
2511
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2512
ctypes.byref(buf_len))
1854
(gnutls.library.functions
1855
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1856
ctypes.byref(buf_len)))
2513
1857
# Deinit the certificate
2514
gnutls.openpgp_crt_deinit(crt)
1858
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2515
1859
# Convert the buffer to a Python bytestring
2516
1860
fpr = ctypes.string_at(buf, buf_len.value)
2517
1861
# Convert the bytestring to hexadecimal notation
2606
1944
# socket_wrapper(), if socketfd was set.
2607
1945
socketserver.TCPServer.__init__(self, server_address,
2608
1946
RequestHandlerClass)
2610
1948
def server_bind(self):
2611
1949
"""This overrides the normal server_bind() function
2612
1950
to bind to an interface if one was specified, and also NOT to
2613
1951
bind to an address or port if they were not specified."""
2614
global SO_BINDTODEVICE
2615
1952
if self.interface is not None:
2616
1953
if SO_BINDTODEVICE is None:
2617
# Fall back to a hard-coded value which seems to be
2619
logger.warning("SO_BINDTODEVICE not found, trying 25")
2620
SO_BINDTODEVICE = 25
2622
self.socket.setsockopt(
2623
socket.SOL_SOCKET, SO_BINDTODEVICE,
2624
(self.interface + "\0").encode("utf-8"))
2625
except socket.error as error:
2626
if error.errno == errno.EPERM:
2627
logger.error("No permission to bind to"
2628
" interface %s", self.interface)
2629
elif error.errno == errno.ENOPROTOOPT:
2630
logger.error("SO_BINDTODEVICE not available;"
2631
" cannot bind to interface %s",
2633
elif error.errno == errno.ENODEV:
2634
logger.error("Interface %s does not exist,"
2635
" cannot bind", self.interface)
1954
logger.error("SO_BINDTODEVICE does not exist;"
1955
" cannot bind to interface %s",
1959
self.socket.setsockopt(socket.SOL_SOCKET,
1961
str(self.interface + '\0'))
1962
except socket.error as error:
1963
if error.errno == errno.EPERM:
1964
logger.error("No permission to bind to"
1965
" interface %s", self.interface)
1966
elif error.errno == errno.ENOPROTOOPT:
1967
logger.error("SO_BINDTODEVICE not available;"
1968
" cannot bind to interface %s",
1970
elif error.errno == errno.ENODEV:
1971
logger.error("Interface %s does not exist,"
1972
" cannot bind", self.interface)
2638
1975
# Only bind(2) the socket if we really need to.
2639
1976
if self.server_address[0] or self.server_address[1]:
2640
if self.server_address[1]:
2641
self.allow_reuse_address = True
2642
1977
if not self.server_address[0]:
2643
1978
if self.address_family == socket.AF_INET6:
2644
any_address = "::" # in6addr_any
1979
any_address = "::" # in6addr_any
2646
any_address = "0.0.0.0" # INADDR_ANY
1981
any_address = socket.INADDR_ANY
2647
1982
self.server_address = (any_address,
2648
1983
self.server_address[1])
2649
1984
elif not self.server_address[1]:
2650
self.server_address = (self.server_address[0], 0)
1985
self.server_address = (self.server_address[0],
2651
1987
# if self.interface:
2652
1988
# self.server_address = (self.server_address[0],
2683
2014
self.gnutls_priority = gnutls_priority
2684
2015
IPv6_TCPServer.__init__(self, server_address,
2685
2016
RequestHandlerClass,
2686
interface=interface,
2017
interface = interface,
2018
use_ipv6 = use_ipv6,
2019
socketfd = socketfd)
2690
2020
def server_activate(self):
2691
2021
if self.enabled:
2692
2022
return socketserver.TCPServer.server_activate(self)
2694
2024
def enable(self):
2695
2025
self.enabled = True
2697
2027
def add_pipe(self, parent_pipe, proc):
2698
2028
# Call "handle_ipc" for both data and EOF events
2700
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2701
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2702
functools.partial(self.handle_ipc,
2703
parent_pipe=parent_pipe,
2706
def handle_ipc(self, source, condition,
2709
client_object=None):
2029
gobject.io_add_watch(parent_pipe.fileno(),
2030
gobject.IO_IN | gobject.IO_HUP,
2031
functools.partial(self.handle_ipc,
2036
def handle_ipc(self, source, condition, parent_pipe=None,
2037
proc = None, client_object=None):
2710
2038
# error, or the other end of multiprocessing.Pipe has closed
2711
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2039
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2712
2040
# Wait for other process to exit
2716
2044
# Read a request from the child
2717
2045
request = parent_pipe.recv()
2718
2046
command = request[0]
2720
2048
if command == 'init':
2721
key_id = request[1].decode("ascii")
2722
fpr = request[2].decode("ascii")
2723
address = request[3]
2725
for c in self.clients.values():
2726
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2728
if key_id and c.key_id == key_id:
2731
if fpr and c.fingerprint == fpr:
2050
address = request[2]
2052
for c in self.clients.itervalues():
2053
if c.fingerprint == fpr:
2735
logger.info("Client not found for key ID: %s, address"
2736
": %s", key_id or fpr, address)
2057
logger.info("Client not found for fingerprint: %s, ad"
2058
"dress: %s", fpr, address)
2737
2059
if self.use_dbus:
2738
2060
# Emit D-Bus signal
2739
mandos_dbus_service.ClientNotFound(key_id or fpr,
2061
mandos_dbus_service.ClientNotFound(fpr,
2741
2063
parent_pipe.send(False)
2745
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2746
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2747
functools.partial(self.handle_ipc,
2748
parent_pipe=parent_pipe,
2750
client_object=client))
2066
gobject.io_add_watch(parent_pipe.fileno(),
2067
gobject.IO_IN | gobject.IO_HUP,
2068
functools.partial(self.handle_ipc,
2751
2074
parent_pipe.send(True)
2752
2075
# remove the old hook in favor of the new above hook on
2756
2079
funcname = request[1]
2757
2080
args = request[2]
2758
2081
kwargs = request[3]
2760
2083
parent_pipe.send(('data', getattr(client_object,
2761
2084
funcname)(*args,
2764
2087
if command == 'getattr':
2765
2088
attrname = request[1]
2766
if isinstance(client_object.__getattribute__(attrname),
2767
collections.abc.Callable):
2768
parent_pipe.send(('function', ))
2089
if callable(client_object.__getattribute__(attrname)):
2090
parent_pipe.send(('function',))
2771
'data', client_object.__getattribute__(attrname)))
2092
parent_pipe.send(('data', client_object
2093
.__getattribute__(attrname)))
2773
2095
if command == 'setattr':
2774
2096
attrname = request[1]
2775
2097
value = request[2]
2776
2098
setattr(client_object, attrname, value)
2781
2103
def rfc3339_duration_to_delta(duration):
2782
2104
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2784
>>> rfc3339_duration_to_delta("P7D") == datetime.timedelta(7)
2786
>>> rfc3339_duration_to_delta("PT60S") == datetime.timedelta(0, 60)
2788
>>> rfc3339_duration_to_delta("PT60M") == datetime.timedelta(0, 3600)
2790
>>> rfc3339_duration_to_delta("PT24H") == datetime.timedelta(1)
2792
>>> rfc3339_duration_to_delta("P1W") == datetime.timedelta(7)
2794
>>> rfc3339_duration_to_delta("PT5M30S") == datetime.timedelta(0, 330)
2796
>>> rfc3339_duration_to_delta("P1DT3M20S") == datetime.timedelta(1, 200)
2106
>>> rfc3339_duration_to_delta("P7D")
2107
datetime.timedelta(7)
2108
>>> rfc3339_duration_to_delta("PT60S")
2109
datetime.timedelta(0, 60)
2110
>>> rfc3339_duration_to_delta("PT60M")
2111
datetime.timedelta(0, 3600)
2112
>>> rfc3339_duration_to_delta("PT24H")
2113
datetime.timedelta(1)
2114
>>> rfc3339_duration_to_delta("P1W")
2115
datetime.timedelta(7)
2116
>>> rfc3339_duration_to_delta("PT5M30S")
2117
datetime.timedelta(0, 330)
2118
>>> rfc3339_duration_to_delta("P1DT3M20S")
2119
datetime.timedelta(1, 200)
2800
2122
# Parsing an RFC 3339 duration with regular expressions is not
2801
2123
# possible - there would have to be multiple places for the same
2802
2124
# values, like seconds. The current code, while more esoteric, is
2803
2125
# cleaner without depending on a parsing library. If Python had a
2804
2126
# built-in library for parsing we would use it, but we'd like to
2805
2127
# avoid excessive use of external libraries.
2807
2129
# New type for defining tokens, syntax, and semantics all-in-one
2808
Token = collections.namedtuple("Token", (
2809
"regexp", # To match token; if "value" is not None, must have
2810
# a "group" containing digits
2811
"value", # datetime.timedelta or None
2812
"followers")) # Tokens valid after this token
2130
Token = collections.namedtuple("Token",
2131
("regexp", # To match token; if
2132
# "value" is not None,
2133
# must have a "group"
2135
"value", # datetime.timedelta or
2137
"followers")) # Tokens valid after
2813
2139
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2814
2140
# the "duration" ABNF definition in RFC 3339, Appendix A.
2815
2141
token_end = Token(re.compile(r"$"), None, frozenset())
2816
2142
token_second = Token(re.compile(r"(\d+)S"),
2817
2143
datetime.timedelta(seconds=1),
2818
frozenset((token_end, )))
2144
frozenset((token_end,)))
2819
2145
token_minute = Token(re.compile(r"(\d+)M"),
2820
2146
datetime.timedelta(minutes=1),
2821
2147
frozenset((token_second, token_end)))
2980
2303
parser.add_argument("--no-dbus", action="store_false",
2981
2304
dest="use_dbus", help="Do not provide D-Bus"
2982
" system bus interface", default=None)
2305
" system bus interface")
2983
2306
parser.add_argument("--no-ipv6", action="store_false",
2984
dest="use_ipv6", help="Do not use IPv6",
2307
dest="use_ipv6", help="Do not use IPv6")
2986
2308
parser.add_argument("--no-restore", action="store_false",
2987
2309
dest="restore", help="Do not restore stored"
2988
" state", default=None)
2989
2311
parser.add_argument("--socket", type=int,
2990
2312
help="Specify a file descriptor to a network"
2991
2313
" socket to use instead of creating one")
2992
2314
parser.add_argument("--statedir", metavar="DIR",
2993
2315
help="Directory to save/restore state in")
2994
2316
parser.add_argument("--foreground", action="store_true",
2995
help="Run in foreground", default=None)
2996
parser.add_argument("--no-zeroconf", action="store_false",
2997
dest="zeroconf", help="Do not use Zeroconf",
2317
help="Run in foreground")
3000
2319
options = parser.parse_args()
3002
2326
# Default values for config file for server-global settings
3003
if gnutls.has_rawpk:
3004
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
3005
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
3007
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
3008
":+SIGN-DSA-SHA256")
3009
server_defaults = {"interface": "",
3013
"priority": priority,
3014
"servicename": "Mandos",
3020
"statedir": "/var/lib/mandos",
3021
"foreground": "False",
2327
server_defaults = { "interface": "",
2332
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2333
"servicename": "Mandos",
2339
"statedir": "/var/lib/mandos",
2340
"foreground": "False",
3026
2343
# Parse config file for server-global settings
3027
server_config = configparser.ConfigParser(server_defaults)
2344
server_config = configparser.SafeConfigParser(server_defaults)
3028
2345
del server_defaults
3029
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3030
# Convert the ConfigParser object to a dict
2346
server_config.read(os.path.join(options.configdir,
2348
# Convert the SafeConfigParser object to a dict
3031
2349
server_settings = server_config.defaults()
3032
2350
# Use the appropriate methods on the non-string config options
3033
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3034
"foreground", "zeroconf"):
2351
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
3035
2352
server_settings[option] = server_config.getboolean("DEFAULT",
3037
2354
if server_settings["port"]:
3153
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3155
2456
except OSError as error:
3156
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3157
.format(uid, gid, os.strerror(error.errno)))
3158
2457
if error.errno != errno.EPERM:
3162
2461
# Enable all possible GnuTLS debugging
3164
2463
# "Use a log level over 10 to enable all debugging options."
3165
2464
# - GnuTLS manual
3166
gnutls.global_set_log_level(11)
2465
gnutls.library.functions.gnutls_global_set_log_level(11)
2467
@gnutls.library.types.gnutls_log_func
3169
2468
def debug_gnutls(level, string):
3170
2469
logger.debug("GnuTLS: %s", string[:-1])
3172
gnutls.global_set_log_function(debug_gnutls)
2471
(gnutls.library.functions
2472
.gnutls_global_set_log_function(debug_gnutls))
3174
2474
# Redirect stdin so all checkers get /dev/null
3175
2475
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
3176
2476
os.dup2(null, sys.stdin.fileno())
3180
2480
# Need to fork before connecting to D-Bus
3181
2481
if not foreground:
3182
2482
# Close all input and output, do double fork, etc.
3185
if gi.version_info < (3, 10, 2):
3186
# multiprocessing will use threads, so before we use GLib we
3187
# need to inform GLib that threads will be used.
2485
# multiprocessing will use threads, so before we use gobject we
2486
# need to inform gobject that threads will be used.
2487
gobject.threads_init()
3190
2489
global main_loop
3191
2490
# From the Avahi example code
3192
2491
DBusGMainLoop(set_as_default=True)
3193
main_loop = GLib.MainLoop()
2492
main_loop = gobject.MainLoop()
3194
2493
bus = dbus.SystemBus()
3195
2494
# End of Avahi example code
3198
2497
bus_name = dbus.service.BusName("se.recompile.Mandos",
3201
old_bus_name = dbus.service.BusName(
3202
"se.bsnet.fukt.Mandos", bus,
3204
except dbus.exceptions.DBusException as e:
2498
bus, do_not_queue=True)
2499
old_bus_name = (dbus.service.BusName
2500
("se.bsnet.fukt.Mandos", bus,
2502
except dbus.exceptions.NameExistsException as e:
3205
2503
logger.error("Disabling D-Bus:", exc_info=e)
3206
2504
use_dbus = False
3207
2505
server_settings["use_dbus"] = False
3208
2506
tcp_server.use_dbus = False
3210
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3211
service = AvahiServiceToSyslog(
3212
name=server_settings["servicename"],
3213
servicetype="_mandos._tcp",
3216
if server_settings["interface"]:
3217
service.interface = if_nametoindex(
3218
server_settings["interface"].encode("utf-8"))
2507
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2508
service = AvahiServiceToSyslog(name =
2509
server_settings["servicename"],
2510
servicetype = "_mandos._tcp",
2511
protocol = protocol, bus = bus)
2512
if server_settings["interface"]:
2513
service.interface = (if_nametoindex
2514
(str(server_settings["interface"])))
3220
2516
global multiprocessing_manager
3221
2517
multiprocessing_manager = multiprocessing.Manager()
3223
2519
client_class = Client
3225
client_class = functools.partial(ClientDBus, bus=bus)
2521
client_class = functools.partial(ClientDBus, bus = bus)
3227
2523
client_settings = Client.config_parser(client_config)
3228
2524
old_client_settings = {}
3229
2525
clients_data = {}
3231
# This is used to redirect stdout and stderr for checker processes
3233
wnull = open(os.devnull, "w") # A writable /dev/null
3234
# Only used if server is running in foreground but not in debug
3236
if debug or not foreground:
3239
2527
# Get client data and settings from last running state.
3240
2528
if server_settings["restore"]:
3242
2530
with open(stored_state_path, "rb") as stored_state:
3243
if sys.version_info.major == 2:
3244
clients_data, old_client_settings = pickle.load(
3247
bytes_clients_data, bytes_old_client_settings = (
3248
pickle.load(stored_state, encoding="bytes"))
3249
# Fix bytes to strings
3252
clients_data = {(key.decode("utf-8")
3253
if isinstance(key, bytes)
3256
bytes_clients_data.items()}
3257
del bytes_clients_data
3258
for key in clients_data:
3259
value = {(k.decode("utf-8")
3260
if isinstance(k, bytes) else k): v
3262
clients_data[key].items()}
3263
clients_data[key] = value
3265
value["client_structure"] = [
3267
if isinstance(s, bytes)
3269
value["client_structure"]]
3270
# .name, .host, and .checker_command
3271
for k in ("name", "host", "checker_command"):
3272
if isinstance(value[k], bytes):
3273
value[k] = value[k].decode("utf-8")
3274
if "key_id" not in value:
3275
value["key_id"] = ""
3276
elif "fingerprint" not in value:
3277
value["fingerprint"] = ""
3278
# old_client_settings
3280
old_client_settings = {
3281
(key.decode("utf-8")
3282
if isinstance(key, bytes)
3285
bytes_old_client_settings.items()}
3286
del bytes_old_client_settings
3287
# .host and .checker_command
3288
for value in old_client_settings.values():
3289
for attribute in ("host", "checker_command"):
3290
if isinstance(value[attribute], bytes):
3291
value[attribute] = (value[attribute]
2531
clients_data, old_client_settings = (pickle.load
3293
2533
os.remove(stored_state_path)
3294
2534
except IOError as e:
3295
2535
if e.errno == errno.ENOENT:
3296
logger.warning("Could not load persistent state:"
3297
" {}".format(os.strerror(e.errno)))
2536
logger.warning("Could not load persistent state: {0}"
2537
.format(os.strerror(e.errno)))
3299
2539
logger.critical("Could not load persistent state:",
3302
2542
except EOFError as e:
3303
2543
logger.warning("Could not load persistent state: "
2544
"EOFError:", exc_info=e)
3307
2546
with PGPEngine() as pgp:
3308
for client_name, client in clients_data.items():
3309
# Skip removed clients
3310
if client_name not in client_settings:
2547
for client_name, client in clients_data.iteritems():
3313
2548
# Decide which value to use after restoring saved state.
3314
2549
# We have three different values: Old config file,
3315
2550
# new config file, and saved state.
3373
2608
for client_name in (set(client_settings)
3374
2609
- set(old_client_settings)):
3375
2610
clients_data[client_name] = client_settings[client_name]
3377
2612
# Create all client objects
3378
for client_name, client in clients_data.items():
2613
for client_name, client in clients_data.iteritems():
3379
2614
tcp_server.clients[client_name] = client_class(
3382
server_settings=server_settings)
2615
name = client_name, settings = client)
3384
2617
if not tcp_server.clients:
3385
2618
logger.warning("No clients defined")
3387
2620
if not foreground:
3388
2621
if pidfile is not None:
3392
print(pid, file=pidfile)
2625
pidfile.write(str(pid) + "\n".encode("utf-8"))
3393
2626
except IOError:
3394
2627
logger.error("Could not write to file %r with PID %d",
3395
2628
pidfilename, pid)
3397
2630
del pidfilename
3399
for termsig in (signal.SIGHUP, signal.SIGTERM):
3400
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3401
lambda: main_loop.quit() and False)
2632
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2633
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3405
@alternate_dbus_interfaces(
3406
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3407
class MandosDBusService(DBusObjectWithObjectManager):
2636
@alternate_dbus_interfaces({"se.recompile.Mandos":
2637
"se.bsnet.fukt.Mandos"})
2638
class MandosDBusService(DBusObjectWithProperties):
3408
2639
"""A D-Bus proxy object"""
3410
2640
def __init__(self):
3411
2641
dbus.service.Object.__init__(self, bus, "/")
3413
2642
_interface = "se.recompile.Mandos"
2644
@dbus_interface_annotations(_interface)
2646
return { "org.freedesktop.DBus.Property"
2647
".EmitsChangedSignal":
3415
2650
@dbus.service.signal(_interface, signature="o")
3416
2651
def ClientAdded(self, objpath):
3420
2655
@dbus.service.signal(_interface, signature="ss")
3421
def ClientNotFound(self, key_id, address):
2656
def ClientNotFound(self, fingerprint, address):
3425
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3427
2660
@dbus.service.signal(_interface, signature="os")
3428
2661
def ClientRemoved(self, objpath, name):
3432
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3434
2665
@dbus.service.method(_interface, out_signature="ao")
3435
2666
def GetAllClients(self):
3437
return dbus.Array(c.dbus_object_path for c in
3438
tcp_server.clients.values())
3440
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2668
return dbus.Array(c.dbus_object_path
2670
tcp_server.clients.itervalues())
3442
2672
@dbus.service.method(_interface,
3443
2673
out_signature="a{oa{sv}}")
3444
2674
def GetAllClientsWithProperties(self):
3446
2676
return dbus.Dictionary(
3447
{c.dbus_object_path: c.GetAll(
3448
"se.recompile.Mandos.Client")
3449
for c in tcp_server.clients.values()},
2677
((c.dbus_object_path, c.GetAll(""))
2678
for c in tcp_server.clients.itervalues()),
3450
2679
signature="oa{sv}")
3452
2681
@dbus.service.method(_interface, in_signature="o")
3453
2682
def RemoveClient(self, object_path):
3455
for c in tcp_server.clients.values():
2684
for c in tcp_server.clients.itervalues():
3456
2685
if c.dbus_object_path == object_path:
3457
2686
del tcp_server.clients[c.name]
3458
2687
c.remove_from_connection()
3459
# Don't signal the disabling
2688
# Don't signal anything except ClientRemoved
3460
2689
c.disable(quiet=True)
3461
# Emit D-Bus signal for removal
3462
self.client_removed_signal(c)
2691
self.ClientRemoved(object_path, c.name)
3464
2693
raise KeyError(object_path)
3468
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3469
out_signature="a{oa{sa{sv}}}")
3470
def GetManagedObjects(self):
3472
return dbus.Dictionary(
3473
{client.dbus_object_path:
3475
{interface: client.GetAll(interface)
3477
client._get_all_interface_names()})
3478
for client in tcp_server.clients.values()})
3480
def client_added_signal(self, client):
3481
"""Send the new standard signal and the old signal"""
3483
# New standard signal
3484
self.InterfacesAdded(
3485
client.dbus_object_path,
3487
{interface: client.GetAll(interface)
3489
client._get_all_interface_names()}))
3491
self.ClientAdded(client.dbus_object_path)
3493
def client_removed_signal(self, client):
3494
"""Send the new standard signal and the old signal"""
3496
# New standard signal
3497
self.InterfacesRemoved(
3498
client.dbus_object_path,
3499
client._get_all_interface_names())
3501
self.ClientRemoved(client.dbus_object_path,
3504
2697
mandos_dbus_service = MandosDBusService()
3506
# Save modules to variables to exempt the modules from being
3507
# unloaded before the function registered with atexit() is run.
3508
mp = multiprocessing
3512
2700
"Cleanup function; run on exit"
3516
mp.active_children()
2703
multiprocessing.active_children()
3518
2704
if not (tcp_server.clients or client_settings):
3521
2707
# Store client before exiting. Secrets are encrypted with key
3522
2708
# based on what config file has. If config file is
3523
2709
# removed/edited, old secret will thus be unrecovable.
3525
2711
with PGPEngine() as pgp:
3526
for client in tcp_server.clients.values():
2712
for client in tcp_server.clients.itervalues():
3527
2713
key = client_settings[client.name]["secret"]
3528
2714
client.encrypted_secret = pgp.encrypt(client.secret,
3530
2716
client_dict = {}
3532
2718
# A list of attributes that can not be pickled
3534
exclude = {"bus", "changedstate", "secret",
3535
"checker", "server_settings"}
3536
for name, typ in inspect.getmembers(dbus.service
2720
exclude = set(("bus", "changedstate", "secret",
2722
for name, typ in (inspect.getmembers
2723
(dbus.service.Object)):
3538
2724
exclude.add(name)
3540
2726
client_dict["encrypted_secret"] = (client
3541
2727
.encrypted_secret)
3542
2728
for attr in client.client_structure:
3543
2729
if attr not in exclude:
3544
2730
client_dict[attr] = getattr(client, attr)
3546
2732
clients[client.name] = client_dict
3547
2733
del client_settings[client.name]["secret"]
3550
with tempfile.NamedTemporaryFile(
3554
dir=os.path.dirname(stored_state_path),
3555
delete=False) as stored_state:
3556
pickle.dump((clients, client_settings), stored_state,
3558
tempname = stored_state.name
2736
with (tempfile.NamedTemporaryFile
2737
(mode='wb', suffix=".pickle", prefix='clients-',
2738
dir=os.path.dirname(stored_state_path),
2739
delete=False)) as stored_state:
2740
pickle.dump((clients, client_settings), stored_state)
2741
tempname=stored_state.name
3559
2742
os.rename(tempname, stored_state_path)
3560
2743
except (IOError, OSError) as e: