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
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8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
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9
# methods "add", "remove", "server_state_changed",
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# "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 © 2008-2019 Teddy Hogeborn
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# Copyright © 2008-2019 Björn Påhlsson
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# This file is part of Mandos.
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# 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
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# Copyright © 2008-2014 Teddy Hogeborn
15
# Copyright © 2008-2014 Björn Påhlsson
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
21
19
# the Free Software Foundation, either version 3 of the License, or
22
20
# (at your option) any later version.
24
# Mandos is distributed in the hope that it will be useful, but
25
# WITHOUT ANY WARRANTY; without even the implied warranty of
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
26
24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27
25
# GNU General Public License for more details.
29
27
# You should have received a copy of the GNU General Public License
30
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
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# Contact the authors at <mandos@recompile.se>.
35
34
from __future__ import (division, absolute_import, print_function,
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from future_builtins import *
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from future_builtins import *
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import SocketServer as socketserver
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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
49
import gnutls.library.types
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import ConfigParser as configparser
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.replace(b"\n", b"\\n")
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.replace(b"\0", b"\\x00"))
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184
def encrypt(self, data, password):
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185
passphrase = self.password_encode(password)
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with tempfile.NamedTemporaryFile(
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dir=self.tempdir) as passfile:
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with tempfile.NamedTemporaryFile(dir=self.tempdir
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passfile.write(passphrase)
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proc = subprocess.Popen([self.gpg, '--symmetric',
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proc = subprocess.Popen(['gpg', '--symmetric',
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191
'--passphrase-file',
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193
+ self.gnupgargs,
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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ciphertext, err = proc.communicate(input=data)
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stdin = subprocess.PIPE,
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stdout = subprocess.PIPE,
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stderr = subprocess.PIPE)
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ciphertext, err = proc.communicate(input = data)
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198
if proc.returncode != 0:
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199
raise PGPError(err)
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return ciphertext
287
202
def decrypt(self, data, password):
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203
passphrase = self.password_encode(password)
289
with tempfile.NamedTemporaryFile(
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dir=self.tempdir) as passfile:
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with tempfile.NamedTemporaryFile(dir = self.tempdir
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passfile.write(passphrase)
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proc = subprocess.Popen([self.gpg, '--decrypt',
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proc = subprocess.Popen(['gpg', '--decrypt',
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'--passphrase-file',
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211
+ self.gnupgargs,
297
stdin=subprocess.PIPE,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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decrypted_plaintext, err = proc.communicate(input=data)
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stdin = subprocess.PIPE,
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stdout = subprocess.PIPE,
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stderr = subprocess.PIPE)
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decrypted_plaintext, err = proc.communicate(input
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217
if proc.returncode != 0:
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raise PGPError(err)
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return decrypted_plaintext
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# Pretend that we have an Avahi module
308
"""This isn't so much a class as it is a module-like namespace."""
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IF_UNSPEC = -1 # avahi-common/address.h
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PROTO_UNSPEC = -1 # avahi-common/address.h
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PROTO_INET = 0 # avahi-common/address.h
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PROTO_INET6 = 1 # avahi-common/address.h
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DBUS_NAME = "org.freedesktop.Avahi"
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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
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DBUS_PATH_SERVER = "/"
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def string_array_to_txt_array(t):
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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
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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
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SERVER_INVALID = 0 # avahi-common/defs.h
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SERVER_REGISTERING = 1 # avahi-common/defs.h
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SERVER_RUNNING = 2 # avahi-common/defs.h
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SERVER_COLLISION = 3 # avahi-common/defs.h
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SERVER_FAILURE = 4 # avahi-common/defs.h
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222
class AvahiError(Exception):
333
223
def __init__(self, value, *args, **kwargs):
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224
self.value = value
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return super(AvahiError, self).__init__(value, *args,
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228
class AvahiServiceError(AvahiError):
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class AvahiGroupError(AvahiError):
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class AvahiService(object):
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"""An Avahi (Zeroconf) service.
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interface: integer; avahi.IF_UNSPEC or an interface index.
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Used to optionally bind to the specified interface.
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follow_name_owner_changes=True),
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avahi.DBUS_INTERFACE_SERVER)
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self.server.connect_to_signal("StateChanged",
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self.server_state_changed)
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self.server_state_changed)
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self.server_state_changed(self.server.GetState())
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390
class AvahiServiceToSyslog(AvahiService):
525
def rename(self, *args, **kwargs):
526
392
"""Add the new name to the syslog messages"""
527
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
528
syslogger.setFormatter(logging.Formatter(
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'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
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ret = AvahiService.rename(self)
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syslogger.setFormatter(logging.Formatter
395
('Mandos ({}) [%(process)d]:'
396
' %(levelname)s: %(message)s'
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# 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")
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library = ctypes.util.find_library("gnutls-deb0")
541
_library = ctypes.cdll.LoadLibrary(library)
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# 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))
401
class Client(object):
847
402
"""A representation of a client host served by this server.
850
405
approved: bool(); 'None' if not yet approved/disapproved
851
406
approval_delay: datetime.timedelta(); Time to wait for approval
852
407
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
408
checker: subprocess.Popen(); a running checker process used
409
to see if the client lives.
410
'None' if no process is running.
411
checker_callback_tag: a gobject event source tag, or None
857
412
checker_command: string; External command which is run to check
858
413
if client lives. %() expansions are done at
859
414
runtime with vars(self) as dict, so that for
860
415
instance %(name)s can be used in the command.
861
checker_initiator_tag: a GLib event source tag, or None
416
checker_initiator_tag: a gobject event source tag, or None
862
417
created: datetime.datetime(); (UTC) object creation
863
418
client_structure: Object describing what attributes a client has
864
419
and is used for storing the client at exit
865
420
current_checker_command: string; current running checker_command
866
disable_initiator_tag: a GLib event source tag, or None
421
disable_initiator_tag: a gobject event source tag, or None
868
423
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
424
uniquely identify the client
872
425
host: string; available for use by the checker command
873
426
interval: datetime.timedelta(); How often to start a new checker
874
427
last_approval_request: datetime.datetime(); (UTC) or None
1031
579
logger.info("Disabling client %s", self.name)
1032
580
if getattr(self, "disable_initiator_tag", None) is not None:
1033
GLib.source_remove(self.disable_initiator_tag)
581
gobject.source_remove(self.disable_initiator_tag)
1034
582
self.disable_initiator_tag = None
1035
583
self.expires = None
1036
584
if getattr(self, "checker_initiator_tag", None) is not None:
1037
GLib.source_remove(self.checker_initiator_tag)
585
gobject.source_remove(self.checker_initiator_tag)
1038
586
self.checker_initiator_tag = None
1039
587
self.stop_checker()
1040
588
self.enabled = False
1042
590
self.send_changedstate()
1043
# Do not run this again if called by a GLib.timeout_add
591
# Do not run this again if called by a gobject.timeout_add
1046
594
def __del__(self):
1049
597
def init_checker(self):
1050
598
# Schedule a new checker to be started an 'interval' from now,
1051
599
# and every interval from then on.
1052
600
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
601
gobject.source_remove(self.checker_initiator_tag)
602
self.checker_initiator_tag = (gobject.timeout_add
604
.total_seconds() * 1000),
1058
606
# Schedule a disable() when 'timeout' has passed
1059
607
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)
608
gobject.source_remove(self.disable_initiator_tag)
609
self.disable_initiator_tag = (gobject.timeout_add
611
.total_seconds() * 1000),
1063
613
# Also start a new checker *right now*.
1064
614
self.start_checker()
1066
def checker_callback(self, source, condition, connection,
616
def checker_callback(self, pid, condition, command):
1068
617
"""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
618
self.checker_callback_tag = None
1075
619
self.checker = None
1078
self.last_checker_status = returncode
1079
self.last_checker_signal = None
620
if os.WIFEXITED(condition):
621
self.last_checker_status = os.WEXITSTATUS(condition)
1080
622
if self.last_checker_status == 0:
1081
623
logger.info("Checker for %(name)s succeeded",
1083
625
self.checked_ok()
1085
logger.info("Checker for %(name)s failed", vars(self))
627
logger.info("Checker for %(name)s failed",
1087
630
self.last_checker_status = -1
1088
self.last_checker_signal = -returncode
1089
631
logger.warning("Checker for %(name)s crashed?",
1093
634
def checked_ok(self):
1094
635
"""Assert that the client has been seen, alive and well."""
1095
636
self.last_checked_ok = datetime.datetime.utcnow()
1096
637
self.last_checker_status = 0
1097
self.last_checker_signal = None
1098
638
self.bump_timeout()
1100
640
def bump_timeout(self, timeout=None):
1101
641
"""Bump up the timeout for this client."""
1102
642
if timeout is None:
1103
643
timeout = self.timeout
1104
644
if self.disable_initiator_tag is not None:
1105
GLib.source_remove(self.disable_initiator_tag)
645
gobject.source_remove(self.disable_initiator_tag)
1106
646
self.disable_initiator_tag = None
1107
647
if getattr(self, "enabled", False):
1108
self.disable_initiator_tag = GLib.timeout_add(
1109
int(timeout.total_seconds() * 1000), self.disable)
648
self.disable_initiator_tag = (gobject.timeout_add
649
(int(timeout.total_seconds()
650
* 1000), self.disable))
1110
651
self.expires = datetime.datetime.utcnow() + timeout
1112
653
def need_approval(self):
1113
654
self.last_approval_request = datetime.datetime.utcnow()
1115
656
def start_checker(self):
1116
657
"""Start a new checker subprocess if one is not running.
1118
659
If a checker already exists, leave it running and do
1120
661
# The reason for not killing a running checker is that if we
1125
666
# checkers alone, the checker would have to take more time
1126
667
# 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")
670
# If a checker exists, make sure it is not a zombie
672
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
673
except AttributeError:
675
except OSError as error:
676
if error.errno != errno.ECHILD:
680
logger.warning("Checker was a zombie")
681
gobject.source_remove(self.checker_callback_tag)
682
self.checker_callback(pid, status,
683
self.current_checker_command)
1133
684
# Start a new checker if needed
1134
685
if self.checker is None:
1135
686
# Escape attributes for the shell
1137
attr: shlex.quote(str(getattr(self, attr)))
1138
for attr in self.runtime_expansions}
687
escaped_attrs = { attr:
688
re.escape(unicode(getattr(self,
690
for attr in self.runtime_expansions }
1140
692
command = self.checker_command % escaped_attrs
1141
693
except TypeError as error:
1142
694
logger.error('Could not format string "%s"',
1143
self.checker_command,
695
self.checker_command, exc_info=error)
696
return True # Try again later
697
self.current_checker_command = command
699
logger.info("Starting checker %r for %s",
701
# We don't need to redirect stdout and stderr, since
702
# in normal mode, that is already done by daemon(),
703
# and in debug mode we don't want to. (Stdin is
704
# always replaced by /dev/null.)
705
# The exception is when not debugging but nevertheless
706
# running in the foreground; use the previously
709
if (not self.server_settings["debug"]
710
and self.server_settings["foreground"]):
711
popen_args.update({"stdout": wnull,
713
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.
845
class DBusObjectWithProperties(dbus.service.Object):
846
"""A D-Bus object with properties.
848
Classes inheriting from this can use the dbus_service_property
849
decorator to expose methods as D-Bus properties. It exposes the
850
standard Get(), Set(), and GetAll() methods on the D-Bus.
1291
854
def _is_dbus_thing(thing):
1292
855
"""Returns a function testing if an attribute is a D-Bus thing
1294
857
If called like _is_dbus_thing("method") it returns a function
1295
858
suitable for use as predicate to inspect.getmembers().
1297
860
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1300
863
def _get_all_dbus_things(self, thing):
1301
864
"""Returns a generator of (name, attribute) pairs
1303
return ((getattr(athing.__get__(self), "_dbus_name", name),
866
return ((getattr(athing.__get__(self), "_dbus_name",
1304
868
athing.__get__(self))
1305
869
for cls in self.__class__.__mro__
1306
870
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.
871
inspect.getmembers(cls,
872
self._is_dbus_thing(thing)))
1380
874
def _get_dbus_property(self, interface_name, property_name):
1381
875
"""Returns a bound method if one exists which is a D-Bus
1382
876
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")):
878
for cls in self.__class__.__mro__:
879
for name, value in (inspect.getmembers
881
self._is_dbus_thing("property"))):
1387
882
if (value._dbus_name == property_name
1388
883
and value._dbus_interface == interface_name):
1389
884
return value.__get__(self)
1391
886
# 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,
887
raise DBusPropertyNotFound(self.dbus_object_path + ":"
888
+ interface_name + "."
891
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1406
892
out_signature="v")
1407
893
def Get(self, interface_name, property_name):
1408
894
"""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
1387
server to mandos-client
1982
1391
# Rejected - signal
1983
1392
@dbus.service.signal(_interface, signature="s")
1984
1393
def Rejected(self, reason):
1988
1397
# NeedApproval - signal
1989
1398
@dbus.service.signal(_interface, signature="tb")
1990
1399
def NeedApproval(self, timeout, default):
1992
1401
return self.need_approval()
1996
1405
# Approve - method
1997
1406
@dbus.service.method(_interface, in_signature="b")
1998
1407
def Approve(self, value):
1999
1408
self.approve(value)
2001
1410
# CheckedOK - method
2002
1411
@dbus.service.method(_interface)
2003
1412
def CheckedOK(self):
2004
1413
self.checked_ok()
2006
1415
# Enable - method
2007
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2008
1416
@dbus.service.method(_interface)
2009
1417
def Enable(self):
2013
1421
# StartChecker - method
2014
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2015
1422
@dbus.service.method(_interface)
2016
1423
def StartChecker(self):
2018
1425
self.start_checker()
2020
1427
# Disable - method
2021
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2022
1428
@dbus.service.method(_interface)
2023
1429
def Disable(self):
2027
1433
# StopChecker - method
2028
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2029
1434
@dbus.service.method(_interface)
2030
1435
def StopChecker(self):
2031
1436
self.stop_checker()
2035
1440
# ApprovalPending - property
2036
1441
@dbus_service_property(_interface, signature="b", access="read")
2037
1442
def ApprovalPending_dbus_property(self):
2038
1443
return dbus.Boolean(bool(self.approvals_pending))
2040
1445
# ApprovedByDefault - property
2041
@dbus_service_property(_interface,
1446
@dbus_service_property(_interface, signature="b",
2043
1447
access="readwrite")
2044
1448
def ApprovedByDefault_dbus_property(self, value=None):
2045
1449
if value is None: # get
2046
1450
return dbus.Boolean(self.approved_by_default)
2047
1451
self.approved_by_default = bool(value)
2049
1453
# ApprovalDelay - property
2050
@dbus_service_property(_interface,
1454
@dbus_service_property(_interface, signature="t",
2052
1455
access="readwrite")
2053
1456
def ApprovalDelay_dbus_property(self, value=None):
2054
1457
if value is None: # get
2055
1458
return dbus.UInt64(self.approval_delay.total_seconds()
2057
1460
self.approval_delay = datetime.timedelta(0, 0, 0, value)
2059
1462
# ApprovalDuration - property
2060
@dbus_service_property(_interface,
1463
@dbus_service_property(_interface, signature="t",
2062
1464
access="readwrite")
2063
1465
def ApprovalDuration_dbus_property(self, value=None):
2064
1466
if value is None: # get
2065
1467
return dbus.UInt64(self.approval_duration.total_seconds()
2067
1469
self.approval_duration = datetime.timedelta(0, 0, 0, value)
2069
1471
# Name - property
2071
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2072
1472
@dbus_service_property(_interface, signature="s", access="read")
2073
1473
def Name_dbus_property(self):
2074
1474
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
1476
# Fingerprint - property
2085
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2086
1477
@dbus_service_property(_interface, signature="s", access="read")
2087
1478
def Fingerprint_dbus_property(self):
2088
1479
return dbus.String(self.fingerprint)
2090
1481
# Host - property
2091
@dbus_service_property(_interface,
1482
@dbus_service_property(_interface, signature="s",
2093
1483
access="readwrite")
2094
1484
def Host_dbus_property(self, value=None):
2095
1485
if value is None: # get
2096
1486
return dbus.String(self.host)
2097
self.host = str(value)
1487
self.host = unicode(value)
2099
1489
# Created - property
2101
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2102
1490
@dbus_service_property(_interface, signature="s", access="read")
2103
1491
def Created_dbus_property(self):
2104
1492
return datetime_to_dbus(self.created)
2106
1494
# LastEnabled - property
2107
1495
@dbus_service_property(_interface, signature="s", access="read")
2108
1496
def LastEnabled_dbus_property(self):
2109
1497
return datetime_to_dbus(self.last_enabled)
2111
1499
# Enabled - property
2112
@dbus_service_property(_interface,
1500
@dbus_service_property(_interface, signature="b",
2114
1501
access="readwrite")
2115
1502
def Enabled_dbus_property(self, value=None):
2116
1503
if value is None: # get
2398
1768
delay -= time2 - time
2401
session.send(client.secret)
2402
except gnutls.Error as error:
2403
logger.warning("gnutls send failed",
1771
while sent_size < len(client.secret):
1773
sent = session.send(client.secret[sent_size:])
1774
except gnutls.errors.GNUTLSError as error:
1775
logger.warning("gnutls send failed",
1778
logger.debug("Sent: %d, remaining: %d",
1779
sent, len(client.secret)
1780
- (sent_size + sent))
2407
1783
logger.info("Sending secret to %s", client.name)
2408
1784
# bump the timeout using extended_timeout
2409
1785
client.bump_timeout(client.extended_timeout)
2410
1786
if self.server.use_dbus:
2411
1787
# Emit D-Bus signal
2412
1788
client.GotSecret()
2415
1791
if approval_required:
2416
1792
client.approvals_pending -= 1
2419
except gnutls.Error as error:
1795
except gnutls.errors.GNUTLSError as error:
2420
1796
logger.warning("GnuTLS bye failed",
2421
1797
exc_info=error)
2424
1800
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
1801
"Return the peer's OpenPGP certificate as a bytestring"
1802
# If not an OpenPGP certificate...
1803
if (gnutls.library.functions
1804
.gnutls_certificate_type_get(session._c_object)
1805
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1806
# ...do the normal thing
1807
return session.peer_certificate
2441
1808
list_size = ctypes.c_uint(1)
2442
cert_list = (gnutls.certificate_get_peers
1809
cert_list = (gnutls.library.functions
1810
.gnutls_certificate_get_peers
2443
1811
(session._c_object, ctypes.byref(list_size)))
2444
1812
if not bool(cert_list) and list_size.value != 0:
2445
raise gnutls.Error("error getting peer certificate")
1813
raise gnutls.errors.GNUTLSError("error getting peer"
2446
1815
if list_size.value == 0:
2448
1817
cert = cert_list[0]
2449
1818
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
1821
def fingerprint(openpgp):
2487
1822
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2488
1823
# 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)))
1824
datum = (gnutls.library.types
1825
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1828
ctypes.c_uint(len(openpgp))))
2493
1829
# New empty GnuTLS certificate
2494
crt = gnutls.openpgp_crt_t()
2495
gnutls.openpgp_crt_init(ctypes.byref(crt))
1830
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1831
(gnutls.library.functions
1832
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2496
1833
# Import the OpenPGP public key into the certificate
2497
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2498
gnutls.OPENPGP_FMT_RAW)
1834
(gnutls.library.functions
1835
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1836
gnutls.library.constants
1837
.GNUTLS_OPENPGP_FMT_RAW))
2499
1838
# Verify the self signature in the key
2500
1839
crtverify = ctypes.c_uint()
2501
gnutls.openpgp_crt_verify_self(crt, 0,
2502
ctypes.byref(crtverify))
1840
(gnutls.library.functions
1841
.gnutls_openpgp_crt_verify_self(crt, 0,
1842
ctypes.byref(crtverify)))
2503
1843
if crtverify.value != 0:
2504
gnutls.openpgp_crt_deinit(crt)
2505
raise gnutls.CertificateSecurityError(code
1844
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1845
raise (gnutls.errors.CertificateSecurityError
2507
1847
# New buffer for the fingerprint
2508
1848
buf = ctypes.create_string_buffer(20)
2509
1849
buf_len = ctypes.c_size_t()
2510
1850
# Get the fingerprint from the certificate into the buffer
2511
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2512
ctypes.byref(buf_len))
1851
(gnutls.library.functions
1852
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1853
ctypes.byref(buf_len)))
2513
1854
# Deinit the certificate
2514
gnutls.openpgp_crt_deinit(crt)
1855
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2515
1856
# Convert the buffer to a Python bytestring
2516
1857
fpr = ctypes.string_at(buf, buf_len.value)
2517
1858
# Convert the bytestring to hexadecimal notation
2606
1941
# socket_wrapper(), if socketfd was set.
2607
1942
socketserver.TCPServer.__init__(self, server_address,
2608
1943
RequestHandlerClass)
2610
1945
def server_bind(self):
2611
1946
"""This overrides the normal server_bind() function
2612
1947
to bind to an interface if one was specified, and also NOT to
2613
1948
bind to an address or port if they were not specified."""
2614
global SO_BINDTODEVICE
2615
1949
if self.interface is not None:
2616
1950
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)
1951
logger.error("SO_BINDTODEVICE does not exist;"
1952
" cannot bind to interface %s",
1956
self.socket.setsockopt(socket.SOL_SOCKET,
1958
(self.interface + "\0")
1960
except socket.error as error:
1961
if error.errno == errno.EPERM:
1962
logger.error("No permission to bind to"
1963
" interface %s", self.interface)
1964
elif error.errno == errno.ENOPROTOOPT:
1965
logger.error("SO_BINDTODEVICE not available;"
1966
" cannot bind to interface %s",
1968
elif error.errno == errno.ENODEV:
1969
logger.error("Interface %s does not exist,"
1970
" cannot bind", self.interface)
2638
1973
# Only bind(2) the socket if we really need to.
2639
1974
if self.server_address[0] or self.server_address[1]:
2640
if self.server_address[1]:
2641
self.allow_reuse_address = True
2642
1975
if not self.server_address[0]:
2643
1976
if self.address_family == socket.AF_INET6:
2644
any_address = "::" # in6addr_any
1977
any_address = "::" # in6addr_any
2646
any_address = "0.0.0.0" # INADDR_ANY
1979
any_address = "0.0.0.0" # INADDR_ANY
2647
1980
self.server_address = (any_address,
2648
1981
self.server_address[1])
2649
1982
elif not self.server_address[1]:
2650
self.server_address = (self.server_address[0], 0)
1983
self.server_address = (self.server_address[0],
2651
1985
# if self.interface:
2652
1986
# self.server_address = (self.server_address[0],
2683
2012
self.gnutls_priority = gnutls_priority
2684
2013
IPv6_TCPServer.__init__(self, server_address,
2685
2014
RequestHandlerClass,
2686
interface=interface,
2015
interface = interface,
2016
use_ipv6 = use_ipv6,
2017
socketfd = socketfd)
2690
2018
def server_activate(self):
2691
2019
if self.enabled:
2692
2020
return socketserver.TCPServer.server_activate(self)
2694
2022
def enable(self):
2695
2023
self.enabled = True
2697
2025
def add_pipe(self, parent_pipe, proc):
2698
2026
# 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):
2027
gobject.io_add_watch(parent_pipe.fileno(),
2028
gobject.IO_IN | gobject.IO_HUP,
2029
functools.partial(self.handle_ipc,
2034
def handle_ipc(self, source, condition, parent_pipe=None,
2035
proc = None, client_object=None):
2710
2036
# error, or the other end of multiprocessing.Pipe has closed
2711
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2037
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2712
2038
# Wait for other process to exit
2716
2042
# Read a request from the child
2717
2043
request = parent_pipe.recv()
2718
2044
command = request[0]
2720
2046
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:
2048
address = request[2]
2050
for c in self.clients.itervalues():
2051
if c.fingerprint == fpr:
2735
logger.info("Client not found for key ID: %s, address"
2736
": %s", key_id or fpr, address)
2055
logger.info("Client not found for fingerprint: %s, ad"
2056
"dress: %s", fpr, address)
2737
2057
if self.use_dbus:
2738
2058
# Emit D-Bus signal
2739
mandos_dbus_service.ClientNotFound(key_id or fpr,
2059
mandos_dbus_service.ClientNotFound(fpr,
2741
2061
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))
2064
gobject.io_add_watch(parent_pipe.fileno(),
2065
gobject.IO_IN | gobject.IO_HUP,
2066
functools.partial(self.handle_ipc,
2751
2072
parent_pipe.send(True)
2752
2073
# remove the old hook in favor of the new above hook on
2756
2077
funcname = request[1]
2757
2078
args = request[2]
2758
2079
kwargs = request[3]
2760
2081
parent_pipe.send(('data', getattr(client_object,
2761
2082
funcname)(*args,
2764
2085
if command == 'getattr':
2765
2086
attrname = request[1]
2766
if isinstance(client_object.__getattribute__(attrname),
2767
collections.abc.Callable):
2768
parent_pipe.send(('function', ))
2087
if callable(client_object.__getattribute__(attrname)):
2088
parent_pipe.send(('function',))
2771
'data', client_object.__getattribute__(attrname)))
2090
parent_pipe.send(('data', client_object
2091
.__getattribute__(attrname)))
2773
2093
if command == 'setattr':
2774
2094
attrname = request[1]
2775
2095
value = request[2]
2776
2096
setattr(client_object, attrname, value)
2781
2101
def rfc3339_duration_to_delta(duration):
2782
2102
"""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)
2104
>>> rfc3339_duration_to_delta("P7D")
2105
datetime.timedelta(7)
2106
>>> rfc3339_duration_to_delta("PT60S")
2107
datetime.timedelta(0, 60)
2108
>>> rfc3339_duration_to_delta("PT60M")
2109
datetime.timedelta(0, 3600)
2110
>>> rfc3339_duration_to_delta("PT24H")
2111
datetime.timedelta(1)
2112
>>> rfc3339_duration_to_delta("P1W")
2113
datetime.timedelta(7)
2114
>>> rfc3339_duration_to_delta("PT5M30S")
2115
datetime.timedelta(0, 330)
2116
>>> rfc3339_duration_to_delta("P1DT3M20S")
2117
datetime.timedelta(1, 200)
2800
2120
# Parsing an RFC 3339 duration with regular expressions is not
2801
2121
# possible - there would have to be multiple places for the same
2802
2122
# values, like seconds. The current code, while more esoteric, is
2803
2123
# cleaner without depending on a parsing library. If Python had a
2804
2124
# built-in library for parsing we would use it, but we'd like to
2805
2125
# avoid excessive use of external libraries.
2807
2127
# 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
2128
Token = collections.namedtuple("Token",
2129
("regexp", # To match token; if
2130
# "value" is not None,
2131
# must have a "group"
2133
"value", # datetime.timedelta or
2135
"followers")) # Tokens valid after
2813
2137
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2814
2138
# the "duration" ABNF definition in RFC 3339, Appendix A.
2815
2139
token_end = Token(re.compile(r"$"), None, frozenset())
2816
2140
token_second = Token(re.compile(r"(\d+)S"),
2817
2141
datetime.timedelta(seconds=1),
2818
frozenset((token_end, )))
2142
frozenset((token_end,)))
2819
2143
token_minute = Token(re.compile(r"(\d+)M"),
2820
2144
datetime.timedelta(minutes=1),
2821
2145
frozenset((token_second, token_end)))
3153
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3155
2474
except OSError as error:
3156
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3157
.format(uid, gid, os.strerror(error.errno)))
3158
2475
if error.errno != errno.EPERM:
3162
2479
# Enable all possible GnuTLS debugging
3164
2481
# "Use a log level over 10 to enable all debugging options."
3165
2482
# - GnuTLS manual
3166
gnutls.global_set_log_level(11)
2483
gnutls.library.functions.gnutls_global_set_log_level(11)
2485
@gnutls.library.types.gnutls_log_func
3169
2486
def debug_gnutls(level, string):
3170
2487
logger.debug("GnuTLS: %s", string[:-1])
3172
gnutls.global_set_log_function(debug_gnutls)
2489
(gnutls.library.functions
2490
.gnutls_global_set_log_function(debug_gnutls))
3174
2492
# Redirect stdin so all checkers get /dev/null
3175
2493
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
3176
2494
os.dup2(null, sys.stdin.fileno())
3180
2498
# Need to fork before connecting to D-Bus
3181
2499
if not foreground:
3182
2500
# 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.
2503
# multiprocessing will use threads, so before we use gobject we
2504
# need to inform gobject that threads will be used.
2505
gobject.threads_init()
3190
2507
global main_loop
3191
2508
# From the Avahi example code
3192
2509
DBusGMainLoop(set_as_default=True)
3193
main_loop = GLib.MainLoop()
2510
main_loop = gobject.MainLoop()
3194
2511
bus = dbus.SystemBus()
3195
2512
# End of Avahi example code
3198
2515
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:
2516
bus, do_not_queue=True)
2517
old_bus_name = (dbus.service.BusName
2518
("se.bsnet.fukt.Mandos", bus,
2520
except dbus.exceptions.NameExistsException as e:
3205
2521
logger.error("Disabling D-Bus:", exc_info=e)
3206
2522
use_dbus = False
3207
2523
server_settings["use_dbus"] = False
3208
2524
tcp_server.use_dbus = False
3210
2526
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3211
service = AvahiServiceToSyslog(
3212
name=server_settings["servicename"],
3213
servicetype="_mandos._tcp",
2527
service = AvahiServiceToSyslog(name =
2528
server_settings["servicename"],
2529
servicetype = "_mandos._tcp",
2530
protocol = protocol, bus = bus)
3216
2531
if server_settings["interface"]:
3217
service.interface = if_nametoindex(
3218
server_settings["interface"].encode("utf-8"))
2532
service.interface = (if_nametoindex
2533
(server_settings["interface"]
3220
2536
global multiprocessing_manager
3221
2537
multiprocessing_manager = multiprocessing.Manager()
3223
2539
client_class = Client
3225
client_class = functools.partial(ClientDBus, bus=bus)
2541
client_class = functools.partial(ClientDBus, bus = bus)
3227
2543
client_settings = Client.config_parser(client_config)
3228
2544
old_client_settings = {}
3229
2545
clients_data = {}
3231
2547
# This is used to redirect stdout and stderr for checker processes
3233
wnull = open(os.devnull, "w") # A writable /dev/null
2549
wnull = open(os.devnull, "w") # A writable /dev/null
3234
2550
# Only used if server is running in foreground but not in debug
3236
2552
if debug or not foreground:
3239
2555
# Get client data and settings from last running state.
3240
2556
if server_settings["restore"]:
3242
2558
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]
2559
clients_data, old_client_settings = (pickle.load
3293
2561
os.remove(stored_state_path)
3294
2562
except IOError as e:
3295
2563
if e.errno == errno.ENOENT:
3296
logger.warning("Could not load persistent state:"
3297
" {}".format(os.strerror(e.errno)))
2564
logger.warning("Could not load persistent state: {}"
2565
.format(os.strerror(e.errno)))
3299
2567
logger.critical("Could not load persistent state:",
3302
2570
except EOFError as e:
3303
2571
logger.warning("Could not load persistent state: "
2572
"EOFError:", exc_info=e)
3307
2574
with PGPEngine() as pgp:
3308
2575
for client_name, client in clients_data.items():
3309
2576
# Skip removed clients
3310
2577
if client_name not in client_settings:
3313
2580
# Decide which value to use after restoring saved state.
3314
2581
# We have three different values: Old config file,
3315
2582
# new config file, and saved state.
3373
2640
for client_name in (set(client_settings)
3374
2641
- set(old_client_settings)):
3375
2642
clients_data[client_name] = client_settings[client_name]
3377
2644
# Create all client objects
3378
2645
for client_name, client in clients_data.items():
3379
2646
tcp_server.clients[client_name] = client_class(
3382
server_settings=server_settings)
2647
name = client_name, settings = client,
2648
server_settings = server_settings)
3384
2650
if not tcp_server.clients:
3385
2651
logger.warning("No clients defined")
3387
2653
if not foreground:
3388
2654
if pidfile is not None:
3392
print(pid, file=pidfile)
2658
pidfile.write("{}\n".format(pid).encode("utf-8"))
3393
2659
except IOError:
3394
2660
logger.error("Could not write to file %r with PID %d",
3395
2661
pidfilename, pid)
3397
2663
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)
2665
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2666
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):
2669
@alternate_dbus_interfaces({"se.recompile.Mandos":
2670
"se.bsnet.fukt.Mandos"})
2671
class MandosDBusService(DBusObjectWithProperties):
3408
2672
"""A D-Bus proxy object"""
3410
2673
def __init__(self):
3411
2674
dbus.service.Object.__init__(self, bus, "/")
3413
2675
_interface = "se.recompile.Mandos"
2677
@dbus_interface_annotations(_interface)
2679
return { "org.freedesktop.DBus.Property"
2680
".EmitsChangedSignal":
3415
2683
@dbus.service.signal(_interface, signature="o")
3416
2684
def ClientAdded(self, objpath):
3420
2688
@dbus.service.signal(_interface, signature="ss")
3421
def ClientNotFound(self, key_id, address):
2689
def ClientNotFound(self, fingerprint, address):
3425
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3427
2693
@dbus.service.signal(_interface, signature="os")
3428
2694
def ClientRemoved(self, objpath, name):
3432
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3434
2698
@dbus.service.method(_interface, out_signature="ao")
3435
2699
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":
2701
return dbus.Array(c.dbus_object_path
2703
tcp_server.clients.itervalues())
3442
2705
@dbus.service.method(_interface,
3443
2706
out_signature="a{oa{sv}}")
3444
2707
def GetAllClientsWithProperties(self):
3446
2709
return dbus.Dictionary(
3447
{c.dbus_object_path: c.GetAll(
3448
"se.recompile.Mandos.Client")
3449
for c in tcp_server.clients.values()},
2710
((c.dbus_object_path, c.GetAll(""))
2711
for c in tcp_server.clients.itervalues()),
3450
2712
signature="oa{sv}")
3452
2714
@dbus.service.method(_interface, in_signature="o")
3453
2715
def RemoveClient(self, object_path):
3455
for c in tcp_server.clients.values():
2717
for c in tcp_server.clients.itervalues():
3456
2718
if c.dbus_object_path == object_path:
3457
2719
del tcp_server.clients[c.name]
3458
2720
c.remove_from_connection()
3459
# Don't signal the disabling
2721
# Don't signal anything except ClientRemoved
3460
2722
c.disable(quiet=True)
3461
# Emit D-Bus signal for removal
3462
self.client_removed_signal(c)
2724
self.ClientRemoved(object_path, c.name)
3464
2726
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
2730
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
2733
"Cleanup function; run on exit"
3514
2735
service.cleanup()
3516
mp.active_children()
2737
multiprocessing.active_children()
3518
2739
if not (tcp_server.clients or client_settings):
3521
2742
# Store client before exiting. Secrets are encrypted with key
3522
2743
# based on what config file has. If config file is
3523
2744
# removed/edited, old secret will thus be unrecovable.
3525
2746
with PGPEngine() as pgp:
3526
for client in tcp_server.clients.values():
2747
for client in tcp_server.clients.itervalues():
3527
2748
key = client_settings[client.name]["secret"]
3528
2749
client.encrypted_secret = pgp.encrypt(client.secret,
3530
2751
client_dict = {}
3532
2753
# 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
2755
exclude = { "bus", "changedstate", "secret",
2756
"checker", "server_settings" }
2757
for name, typ in (inspect.getmembers
2758
(dbus.service.Object)):
3538
2759
exclude.add(name)
3540
2761
client_dict["encrypted_secret"] = (client
3541
2762
.encrypted_secret)
3542
2763
for attr in client.client_structure:
3543
2764
if attr not in exclude:
3544
2765
client_dict[attr] = getattr(client, attr)
3546
2767
clients[client.name] = client_dict
3547
2768
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
2771
with (tempfile.NamedTemporaryFile
2772
(mode='wb', suffix=".pickle", prefix='clients-',
2773
dir=os.path.dirname(stored_state_path),
2774
delete=False)) as stored_state:
2775
pickle.dump((clients, client_settings), stored_state)
2776
tempname=stored_state.name
3559
2777
os.rename(tempname, stored_state_path)
3560
2778
except (IOError, OSError) as e: