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 -*-
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4
# Mandos server - give out binary blobs to connecting clients.
6
6
# This program is partly derived from an example program for an Avahi
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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 © 2008-2020 Teddy Hogeborn
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# Copyright © 2008-2020 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
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# 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
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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,
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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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183
.replace(b"\n", b"\\n")
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.replace(b"\0", b"\\x00"))
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187
def encrypt(self, data, password):
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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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'--passphrase-file',
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196
+ 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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if proc.returncode != 0:
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raise PGPError(err)
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return ciphertext
287
205
def decrypt(self, data, password):
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206
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, '--decrypt',
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proc = subprocess.Popen(['gpg', '--decrypt',
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'--passphrase-file',
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+ 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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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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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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class AvahiError(Exception):
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226
def __init__(self, value, *args, **kwargs):
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227
self.value = value
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return super(AvahiError, self).__init__(value, *args,
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231
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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393
class AvahiServiceToSyslog(AvahiService):
525
def rename(self, *args, **kwargs):
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"""Add the new name to the syslog messages"""
527
ret = super(AvahiServiceToSyslog, self).rename(*args,
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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
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('Mandos ({}) [%(process)d]:'
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' %(levelname)s: %(message)s'
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# Pretend that we have a GnuTLS module
537
"""This isn't so much a class as it is a module-like namespace."""
539
library = ctypes.util.find_library("gnutls")
541
library = ctypes.util.find_library("gnutls-deb0")
542
_library = ctypes.cdll.LoadLibrary(library)
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# Unless otherwise indicated, the constants and types below are
546
# all from the gnutls/gnutls.h C header file.
557
E_NO_CERTIFICATE_FOUND = -49
562
KEYID_USE_SHA256 = 1 # gnutls/x509.h
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OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
566
class session_int(ctypes.Structure):
568
session_t = ctypes.POINTER(session_int)
570
class certificate_credentials_st(ctypes.Structure):
572
certificate_credentials_t = ctypes.POINTER(
573
certificate_credentials_st)
574
certificate_type_t = ctypes.c_int
576
class datum_t(ctypes.Structure):
577
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
578
('size', ctypes.c_uint)]
580
class openpgp_crt_int(ctypes.Structure):
582
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
583
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
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log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
585
credentials_type_t = ctypes.c_int
586
transport_ptr_t = ctypes.c_void_p
587
close_request_t = ctypes.c_int
590
class Error(Exception):
591
def __init__(self, message=None, code=None, args=()):
592
# Default usage is by a message string, but if a return
593
# code is passed, convert it to a string with
596
if message is None and code is not None:
597
message = gnutls.strerror(code)
598
return super(gnutls.Error, self).__init__(
601
class CertificateSecurityError(Error):
607
self._c_object = gnutls.certificate_credentials_t()
608
gnutls.certificate_allocate_credentials(
609
ctypes.byref(self._c_object))
610
self.type = gnutls.CRD_CERTIFICATE
613
gnutls.certificate_free_credentials(self._c_object)
616
def __init__(self, socket, credentials=None):
617
self._c_object = gnutls.session_t()
618
gnutls_flags = gnutls.CLIENT
619
if gnutls.check_version(b"3.5.6"):
620
gnutls_flags |= gnutls.NO_TICKETS
622
gnutls_flags |= gnutls.ENABLE_RAWPK
623
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
625
gnutls.set_default_priority(self._c_object)
626
gnutls.transport_set_ptr(self._c_object, socket.fileno())
627
gnutls.handshake_set_private_extensions(self._c_object,
630
if credentials is None:
631
credentials = gnutls.Credentials()
632
gnutls.credentials_set(self._c_object, credentials.type,
633
ctypes.cast(credentials._c_object,
635
self.credentials = credentials
638
gnutls.deinit(self._c_object)
641
return gnutls.handshake(self._c_object)
643
def send(self, data):
647
data_len -= gnutls.record_send(self._c_object,
652
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
654
# Error handling functions
655
def _error_code(result):
656
"""A function to raise exceptions on errors, suitable
657
for the 'restype' attribute on ctypes functions"""
660
if result == gnutls.E_NO_CERTIFICATE_FOUND:
661
raise gnutls.CertificateSecurityError(code=result)
662
raise gnutls.Error(code=result)
664
def _retry_on_error(result, func, arguments):
665
"""A function to retry on some errors, suitable
666
for the 'errcheck' attribute on ctypes functions"""
668
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
669
return _error_code(result)
670
result = func(*arguments)
673
# Unless otherwise indicated, the function declarations below are
674
# all from the gnutls/gnutls.h C header file.
677
priority_set_direct = _library.gnutls_priority_set_direct
678
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
679
ctypes.POINTER(ctypes.c_char_p)]
680
priority_set_direct.restype = _error_code
682
init = _library.gnutls_init
683
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
684
init.restype = _error_code
686
set_default_priority = _library.gnutls_set_default_priority
687
set_default_priority.argtypes = [session_t]
688
set_default_priority.restype = _error_code
690
record_send = _library.gnutls_record_send
691
record_send.argtypes = [session_t, ctypes.c_void_p,
693
record_send.restype = ctypes.c_ssize_t
694
record_send.errcheck = _retry_on_error
696
certificate_allocate_credentials = (
697
_library.gnutls_certificate_allocate_credentials)
698
certificate_allocate_credentials.argtypes = [
699
ctypes.POINTER(certificate_credentials_t)]
700
certificate_allocate_credentials.restype = _error_code
702
certificate_free_credentials = (
703
_library.gnutls_certificate_free_credentials)
704
certificate_free_credentials.argtypes = [
705
certificate_credentials_t]
706
certificate_free_credentials.restype = None
708
handshake_set_private_extensions = (
709
_library.gnutls_handshake_set_private_extensions)
710
handshake_set_private_extensions.argtypes = [session_t,
712
handshake_set_private_extensions.restype = None
714
credentials_set = _library.gnutls_credentials_set
715
credentials_set.argtypes = [session_t, credentials_type_t,
717
credentials_set.restype = _error_code
719
strerror = _library.gnutls_strerror
720
strerror.argtypes = [ctypes.c_int]
721
strerror.restype = ctypes.c_char_p
723
certificate_type_get = _library.gnutls_certificate_type_get
724
certificate_type_get.argtypes = [session_t]
725
certificate_type_get.restype = _error_code
727
certificate_get_peers = _library.gnutls_certificate_get_peers
728
certificate_get_peers.argtypes = [session_t,
729
ctypes.POINTER(ctypes.c_uint)]
730
certificate_get_peers.restype = ctypes.POINTER(datum_t)
732
global_set_log_level = _library.gnutls_global_set_log_level
733
global_set_log_level.argtypes = [ctypes.c_int]
734
global_set_log_level.restype = None
736
global_set_log_function = _library.gnutls_global_set_log_function
737
global_set_log_function.argtypes = [log_func]
738
global_set_log_function.restype = None
740
deinit = _library.gnutls_deinit
741
deinit.argtypes = [session_t]
742
deinit.restype = None
744
handshake = _library.gnutls_handshake
745
handshake.argtypes = [session_t]
746
handshake.restype = _error_code
747
handshake.errcheck = _retry_on_error
749
transport_set_ptr = _library.gnutls_transport_set_ptr
750
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
751
transport_set_ptr.restype = None
753
bye = _library.gnutls_bye
754
bye.argtypes = [session_t, close_request_t]
755
bye.restype = _error_code
756
bye.errcheck = _retry_on_error
758
check_version = _library.gnutls_check_version
759
check_version.argtypes = [ctypes.c_char_p]
760
check_version.restype = ctypes.c_char_p
762
_need_version = b"3.3.0"
763
if check_version(_need_version) is None:
764
raise self.Error("Needs GnuTLS {} or later"
765
.format(_need_version))
767
_tls_rawpk_version = b"3.6.6"
768
has_rawpk = bool(check_version(_tls_rawpk_version))
772
class pubkey_st(ctypes.Structure):
774
pubkey_t = ctypes.POINTER(pubkey_st)
776
x509_crt_fmt_t = ctypes.c_int
778
# All the function declarations below are from
780
pubkey_init = _library.gnutls_pubkey_init
781
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
782
pubkey_init.restype = _error_code
784
pubkey_import = _library.gnutls_pubkey_import
785
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
787
pubkey_import.restype = _error_code
789
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
790
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
791
ctypes.POINTER(ctypes.c_ubyte),
792
ctypes.POINTER(ctypes.c_size_t)]
793
pubkey_get_key_id.restype = _error_code
795
pubkey_deinit = _library.gnutls_pubkey_deinit
796
pubkey_deinit.argtypes = [pubkey_t]
797
pubkey_deinit.restype = None
799
# All the function declarations below are from
802
openpgp_crt_init = _library.gnutls_openpgp_crt_init
803
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
804
openpgp_crt_init.restype = _error_code
806
openpgp_crt_import = _library.gnutls_openpgp_crt_import
807
openpgp_crt_import.argtypes = [openpgp_crt_t,
808
ctypes.POINTER(datum_t),
810
openpgp_crt_import.restype = _error_code
812
openpgp_crt_verify_self = \
813
_library.gnutls_openpgp_crt_verify_self
814
openpgp_crt_verify_self.argtypes = [
817
ctypes.POINTER(ctypes.c_uint),
819
openpgp_crt_verify_self.restype = _error_code
821
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
822
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
823
openpgp_crt_deinit.restype = None
825
openpgp_crt_get_fingerprint = (
826
_library.gnutls_openpgp_crt_get_fingerprint)
827
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
831
openpgp_crt_get_fingerprint.restype = _error_code
833
if check_version(b"3.6.4"):
834
certificate_type_get2 = _library.gnutls_certificate_type_get2
835
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
836
certificate_type_get2.restype = _error_code
838
# Remove non-public functions
839
del _error_code, _retry_on_error
842
def call_pipe(connection, # : multiprocessing.Connection
843
func, *args, **kwargs):
844
"""This function is meant to be called by multiprocessing.Process
846
This function runs func(*args, **kwargs), and writes the resulting
847
return value on the provided multiprocessing.Connection.
849
connection.send(func(*args, **kwargs))
404
class Client(object):
854
405
"""A representation of a client host served by this server.
857
408
approved: bool(); 'None' if not yet approved/disapproved
858
409
approval_delay: datetime.timedelta(); Time to wait for approval
859
410
approval_duration: datetime.timedelta(); Duration of one approval
860
checker: multiprocessing.Process(); a running checker process used
861
to see if the client lives. 'None' if no process is
863
checker_callback_tag: a GLib event source tag, or None
411
checker: subprocess.Popen(); a running checker process used
412
to see if the client lives.
413
'None' if no process is running.
414
checker_callback_tag: a gobject event source tag, or None
864
415
checker_command: string; External command which is run to check
865
416
if client lives. %() expansions are done at
866
417
runtime with vars(self) as dict, so that for
867
418
instance %(name)s can be used in the command.
868
checker_initiator_tag: a GLib event source tag, or None
419
checker_initiator_tag: a gobject event source tag, or None
869
420
created: datetime.datetime(); (UTC) object creation
870
421
client_structure: Object describing what attributes a client has
871
422
and is used for storing the client at exit
872
423
current_checker_command: string; current running checker_command
873
disable_initiator_tag: a GLib event source tag, or None
424
disable_initiator_tag: a gobject event source tag, or None
875
426
fingerprint: string (40 or 32 hexadecimal digits); used to
876
uniquely identify an OpenPGP client
877
key_id: string (64 hexadecimal digits); used to uniquely identify
878
a client using raw public keys
427
uniquely identify the client
879
428
host: string; available for use by the checker command
880
429
interval: datetime.timedelta(); How often to start a new checker
881
430
last_approval_request: datetime.datetime(); (UTC) or None
1038
582
logger.info("Disabling client %s", self.name)
1039
583
if getattr(self, "disable_initiator_tag", None) is not None:
1040
GLib.source_remove(self.disable_initiator_tag)
584
gobject.source_remove(self.disable_initiator_tag)
1041
585
self.disable_initiator_tag = None
1042
586
self.expires = None
1043
587
if getattr(self, "checker_initiator_tag", None) is not None:
1044
GLib.source_remove(self.checker_initiator_tag)
588
gobject.source_remove(self.checker_initiator_tag)
1045
589
self.checker_initiator_tag = None
1046
590
self.stop_checker()
1047
591
self.enabled = False
1049
593
self.send_changedstate()
1050
# Do not run this again if called by a GLib.timeout_add
594
# Do not run this again if called by a gobject.timeout_add
1053
597
def __del__(self):
1056
600
def init_checker(self):
1057
601
# Schedule a new checker to be started an 'interval' from now,
1058
602
# and every interval from then on.
1059
603
if self.checker_initiator_tag is not None:
1060
GLib.source_remove(self.checker_initiator_tag)
1061
self.checker_initiator_tag = GLib.timeout_add(
1062
random.randrange(int(self.interval.total_seconds() * 1000
604
gobject.source_remove(self.checker_initiator_tag)
605
self.checker_initiator_tag = (gobject.timeout_add
607
.total_seconds() * 1000),
1065
609
# Schedule a disable() when 'timeout' has passed
1066
610
if self.disable_initiator_tag is not None:
1067
GLib.source_remove(self.disable_initiator_tag)
1068
self.disable_initiator_tag = GLib.timeout_add(
1069
int(self.timeout.total_seconds() * 1000), self.disable)
611
gobject.source_remove(self.disable_initiator_tag)
612
self.disable_initiator_tag = (gobject.timeout_add
614
.total_seconds() * 1000),
1070
616
# Also start a new checker *right now*.
1071
617
self.start_checker()
1073
def checker_callback(self, source, condition, connection,
619
def checker_callback(self, pid, condition, command):
1075
620
"""The checker has completed, so take appropriate actions."""
1076
# Read return code from connection (see call_pipe)
1077
returncode = connection.recv()
1079
if self.checker is not None:
1081
621
self.checker_callback_tag = None
1082
622
self.checker = None
1085
self.last_checker_status = returncode
1086
self.last_checker_signal = None
623
if os.WIFEXITED(condition):
624
self.last_checker_status = os.WEXITSTATUS(condition)
1087
625
if self.last_checker_status == 0:
1088
626
logger.info("Checker for %(name)s succeeded",
1090
628
self.checked_ok()
1092
logger.info("Checker for %(name)s failed", vars(self))
630
logger.info("Checker for %(name)s failed",
1094
633
self.last_checker_status = -1
1095
self.last_checker_signal = -returncode
1096
634
logger.warning("Checker for %(name)s crashed?",
1100
637
def checked_ok(self):
1101
638
"""Assert that the client has been seen, alive and well."""
1102
639
self.last_checked_ok = datetime.datetime.utcnow()
1103
640
self.last_checker_status = 0
1104
self.last_checker_signal = None
1105
641
self.bump_timeout()
1107
643
def bump_timeout(self, timeout=None):
1108
644
"""Bump up the timeout for this client."""
1109
645
if timeout is None:
1110
646
timeout = self.timeout
1111
647
if self.disable_initiator_tag is not None:
1112
GLib.source_remove(self.disable_initiator_tag)
648
gobject.source_remove(self.disable_initiator_tag)
1113
649
self.disable_initiator_tag = None
1114
650
if getattr(self, "enabled", False):
1115
self.disable_initiator_tag = GLib.timeout_add(
1116
int(timeout.total_seconds() * 1000), self.disable)
651
self.disable_initiator_tag = (gobject.timeout_add
652
(int(timeout.total_seconds()
653
* 1000), self.disable))
1117
654
self.expires = datetime.datetime.utcnow() + timeout
1119
656
def need_approval(self):
1120
657
self.last_approval_request = datetime.datetime.utcnow()
1122
659
def start_checker(self):
1123
660
"""Start a new checker subprocess if one is not running.
1125
662
If a checker already exists, leave it running and do
1127
664
# The reason for not killing a running checker is that if we
1132
669
# checkers alone, the checker would have to take more time
1133
670
# than 'timeout' for the client to be disabled, which is as it
1136
if self.checker is not None and not self.checker.is_alive():
1137
logger.warning("Checker was not alive; joining")
673
# If a checker exists, make sure it is not a zombie
675
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
676
except AttributeError:
678
except OSError as error:
679
if error.errno != errno.ECHILD:
683
logger.warning("Checker was a zombie")
684
gobject.source_remove(self.checker_callback_tag)
685
self.checker_callback(pid, status,
686
self.current_checker_command)
1140
687
# Start a new checker if needed
1141
688
if self.checker is None:
1142
689
# Escape attributes for the shell
1144
attr: shlex.quote(str(getattr(self, attr)))
1145
for attr in self.runtime_expansions}
690
escaped_attrs = { attr:
691
re.escape(str(getattr(self, attr)))
692
for attr in self.runtime_expansions }
1147
694
command = self.checker_command % escaped_attrs
1148
695
except TypeError as error:
1149
696
logger.error('Could not format string "%s"',
1150
self.checker_command,
697
self.checker_command, exc_info=error)
698
return True # Try again later
699
self.current_checker_command = command
701
logger.info("Starting checker %r for %s",
703
# We don't need to redirect stdout and stderr, since
704
# in normal mode, that is already done by daemon(),
705
# and in debug mode we don't want to. (Stdin is
706
# always replaced by /dev/null.)
707
# The exception is when not debugging but nevertheless
708
# running in the foreground; use the previously
711
if (not self.server_settings["debug"]
712
and self.server_settings["foreground"]):
713
popen_args.update({"stdout": wnull,
715
self.checker = subprocess.Popen(command,
719
except OSError as error:
720
logger.error("Failed to start subprocess",
1152
return True # Try again later
1153
self.current_checker_command = command
1154
logger.info("Starting checker %r for %s", command,
1156
# We don't need to redirect stdout and stderr, since
1157
# in normal mode, that is already done by daemon(),
1158
# and in debug mode we don't want to. (Stdin is
1159
# always replaced by /dev/null.)
1160
# The exception is when not debugging but nevertheless
1161
# running in the foreground; use the previously
1163
popen_args = {"close_fds": True,
1166
if (not self.server_settings["debug"]
1167
and self.server_settings["foreground"]):
1168
popen_args.update({"stdout": wnull,
1170
pipe = multiprocessing.Pipe(duplex=False)
1171
self.checker = multiprocessing.Process(
1173
args=(pipe[1], subprocess.call, command),
1175
self.checker.start()
1176
self.checker_callback_tag = GLib.io_add_watch(
1177
GLib.IOChannel.unix_new(pipe[0].fileno()),
1178
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
1179
self.checker_callback, pipe[0], command)
1180
# Re-run this periodically if run by GLib.timeout_add
723
self.checker_callback_tag = (gobject.child_watch_add
725
self.checker_callback,
727
# The checker may have completed before the gobject
728
# watch was added. Check for this.
730
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
731
except OSError as error:
732
if error.errno == errno.ECHILD:
733
# This should never happen
734
logger.error("Child process vanished",
739
gobject.source_remove(self.checker_callback_tag)
740
self.checker_callback(pid, status, command)
741
# Re-run this periodically if run by gobject.timeout_add
1183
744
def stop_checker(self):
1184
745
"""Force the checker process, if any, to stop."""
1185
746
if self.checker_callback_tag:
1186
GLib.source_remove(self.checker_callback_tag)
747
gobject.source_remove(self.checker_callback_tag)
1187
748
self.checker_callback_tag = None
1188
749
if getattr(self, "checker", None) is None:
1190
751
logger.debug("Stopping checker for %(name)s", vars(self))
1191
self.checker.terminate()
753
self.checker.terminate()
755
#if self.checker.poll() is None:
756
# self.checker.kill()
757
except OSError as error:
758
if error.errno != errno.ESRCH: # No such process
1192
760
self.checker = None
1195
def dbus_service_property(dbus_interface,
763
def dbus_service_property(dbus_interface, signature="v",
764
access="readwrite", byte_arrays=False):
1199
765
"""Decorators for marking methods of a DBusObjectWithProperties to
1200
766
become properties on the D-Bus.
1202
768
The decorated method will be called with no arguments by "Get"
1203
769
and with one argument by "Set".
1205
771
The parameters, where they are supported, are the same as
1206
772
dbus.service.method, except there is only "signature", since the
1207
773
type from Get() and the type sent to Set() is the same.
1290
class DBusObjectWithAnnotations(dbus.service.Object):
1291
"""A D-Bus object with annotations.
1293
Classes inheriting from this can use the dbus_annotations
1294
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.
1298
856
def _is_dbus_thing(thing):
1299
857
"""Returns a function testing if an attribute is a D-Bus thing
1301
859
If called like _is_dbus_thing("method") it returns a function
1302
860
suitable for use as predicate to inspect.getmembers().
1304
862
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1307
865
def _get_all_dbus_things(self, thing):
1308
866
"""Returns a generator of (name, attribute) pairs
1310
return ((getattr(athing.__get__(self), "_dbus_name", name),
868
return ((getattr(athing.__get__(self), "_dbus_name",
1311
870
athing.__get__(self))
1312
871
for cls in self.__class__.__mro__
1313
872
for name, athing in
1314
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1316
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1318
path_keyword='object_path',
1319
connection_keyword='connection')
1320
def Introspect(self, object_path, connection):
1321
"""Overloading of standard D-Bus method.
1323
Inserts annotation tags on methods and signals.
1325
xmlstring = dbus.service.Object.Introspect(self, object_path,
1328
document = xml.dom.minidom.parseString(xmlstring)
1330
for if_tag in document.getElementsByTagName("interface"):
1331
# Add annotation tags
1332
for typ in ("method", "signal"):
1333
for tag in if_tag.getElementsByTagName(typ):
1335
for name, prop in (self.
1336
_get_all_dbus_things(typ)):
1337
if (name == tag.getAttribute("name")
1338
and prop._dbus_interface
1339
== if_tag.getAttribute("name")):
1340
annots.update(getattr(
1341
prop, "_dbus_annotations", {}))
1342
for name, value in annots.items():
1343
ann_tag = document.createElement(
1345
ann_tag.setAttribute("name", name)
1346
ann_tag.setAttribute("value", value)
1347
tag.appendChild(ann_tag)
1348
# Add interface annotation tags
1349
for annotation, value in dict(
1350
itertools.chain.from_iterable(
1351
annotations().items()
1352
for name, annotations
1353
in self._get_all_dbus_things("interface")
1354
if name == if_tag.getAttribute("name")
1356
ann_tag = document.createElement("annotation")
1357
ann_tag.setAttribute("name", annotation)
1358
ann_tag.setAttribute("value", value)
1359
if_tag.appendChild(ann_tag)
1360
# Fix argument name for the Introspect method itself
1361
if (if_tag.getAttribute("name")
1362
== dbus.INTROSPECTABLE_IFACE):
1363
for cn in if_tag.getElementsByTagName("method"):
1364
if cn.getAttribute("name") == "Introspect":
1365
for arg in cn.getElementsByTagName("arg"):
1366
if (arg.getAttribute("direction")
1368
arg.setAttribute("name",
1370
xmlstring = document.toxml("utf-8")
1372
except (AttributeError, xml.dom.DOMException,
1373
xml.parsers.expat.ExpatError) as error:
1374
logger.error("Failed to override Introspection method",
1379
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1380
"""A D-Bus object with properties.
1382
Classes inheriting from this can use the dbus_service_property
1383
decorator to expose methods as D-Bus properties. It exposes the
1384
standard Get(), Set(), and GetAll() methods on the D-Bus.
873
inspect.getmembers(cls,
874
self._is_dbus_thing(thing)))
1387
876
def _get_dbus_property(self, interface_name, property_name):
1388
877
"""Returns a bound method if one exists which is a D-Bus
1389
878
property with the specified name and interface.
1391
for cls in self.__class__.__mro__:
1392
for name, value in inspect.getmembers(
1393
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"))):
1394
884
if (value._dbus_name == property_name
1395
885
and value._dbus_interface == interface_name):
1396
886
return value.__get__(self)
1398
888
# No such property
1399
raise DBusPropertyNotFound("{}:{}.{}".format(
1400
self.dbus_object_path, interface_name, property_name))
1403
def _get_all_interface_names(cls):
1404
"""Get a sequence of all interfaces supported by an object"""
1405
return (name for name in set(getattr(getattr(x, attr),
1406
"_dbus_interface", None)
1407
for x in (inspect.getmro(cls))
1409
if name is not None)
1411
@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",
1413
894
out_signature="v")
1414
895
def Get(self, interface_name, property_name):
1415
896
"""Standard D-Bus property Get() method, see D-Bus standard.
1543
1036
return xmlstring
1547
dbus.OBJECT_MANAGER_IFACE
1548
except AttributeError:
1549
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1552
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1553
"""A D-Bus object with an ObjectManager.
1555
Classes inheriting from this exposes the standard
1556
GetManagedObjects call and the InterfacesAdded and
1557
InterfacesRemoved signals on the standard
1558
"org.freedesktop.DBus.ObjectManager" interface.
1560
Note: No signals are sent automatically; they must be sent
1563
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1564
out_signature="a{oa{sa{sv}}}")
1565
def GetManagedObjects(self):
1566
"""This function must be overridden"""
1567
raise NotImplementedError()
1569
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1570
signature="oa{sa{sv}}")
1571
def InterfacesAdded(self, object_path, interfaces_and_properties):
1574
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1575
def InterfacesRemoved(self, object_path, interfaces):
1578
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1580
path_keyword='object_path',
1581
connection_keyword='connection')
1582
def Introspect(self, object_path, connection):
1583
"""Overloading of standard D-Bus method.
1585
Override return argument name of GetManagedObjects to be
1586
"objpath_interfaces_and_properties"
1588
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1592
document = xml.dom.minidom.parseString(xmlstring)
1594
for if_tag in document.getElementsByTagName("interface"):
1595
# Fix argument name for the GetManagedObjects method
1596
if (if_tag.getAttribute("name")
1597
== dbus.OBJECT_MANAGER_IFACE):
1598
for cn in if_tag.getElementsByTagName("method"):
1599
if (cn.getAttribute("name")
1600
== "GetManagedObjects"):
1601
for arg in cn.getElementsByTagName("arg"):
1602
if (arg.getAttribute("direction")
1606
"objpath_interfaces"
1608
xmlstring = document.toxml("utf-8")
1610
except (AttributeError, xml.dom.DOMException,
1611
xml.parsers.expat.ExpatError) as error:
1612
logger.error("Failed to override Introspection method",
1617
1039
def datetime_to_dbus(dt, variant_level=0):
1618
1040
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1620
return dbus.String("", variant_level=variant_level)
1621
return dbus.String(dt.isoformat(), variant_level=variant_level)
1042
return dbus.String("", variant_level = variant_level)
1043
return dbus.String(dt.isoformat(),
1044
variant_level=variant_level)
1624
1047
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1985
1407
server to mandos-client
1989
1411
# Rejected - signal
1990
1412
@dbus.service.signal(_interface, signature="s")
1991
1413
def Rejected(self, reason):
1995
1417
# NeedApproval - signal
1996
1418
@dbus.service.signal(_interface, signature="tb")
1997
1419
def NeedApproval(self, timeout, default):
1999
1421
return self.need_approval()
2003
1425
# Approve - method
2004
1426
@dbus.service.method(_interface, in_signature="b")
2005
1427
def Approve(self, value):
2006
1428
self.approve(value)
2008
1430
# CheckedOK - method
2009
1431
@dbus.service.method(_interface)
2010
1432
def CheckedOK(self):
2011
1433
self.checked_ok()
2013
1435
# Enable - method
2014
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2015
1436
@dbus.service.method(_interface)
2016
1437
def Enable(self):
2020
1441
# StartChecker - method
2021
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2022
1442
@dbus.service.method(_interface)
2023
1443
def StartChecker(self):
2025
1445
self.start_checker()
2027
1447
# Disable - method
2028
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2029
1448
@dbus.service.method(_interface)
2030
1449
def Disable(self):
2034
1453
# StopChecker - method
2035
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2036
1454
@dbus.service.method(_interface)
2037
1455
def StopChecker(self):
2038
1456
self.stop_checker()
2042
1460
# ApprovalPending - property
2043
1461
@dbus_service_property(_interface, signature="b", access="read")
2044
1462
def ApprovalPending_dbus_property(self):
2045
1463
return dbus.Boolean(bool(self.approvals_pending))
2047
1465
# ApprovedByDefault - property
2048
@dbus_service_property(_interface,
1466
@dbus_service_property(_interface, signature="b",
2050
1467
access="readwrite")
2051
1468
def ApprovedByDefault_dbus_property(self, value=None):
2052
1469
if value is None: # get
2053
1470
return dbus.Boolean(self.approved_by_default)
2054
1471
self.approved_by_default = bool(value)
2056
1473
# ApprovalDelay - property
2057
@dbus_service_property(_interface,
1474
@dbus_service_property(_interface, signature="t",
2059
1475
access="readwrite")
2060
1476
def ApprovalDelay_dbus_property(self, value=None):
2061
1477
if value is None: # get
2062
1478
return dbus.UInt64(self.approval_delay.total_seconds()
2064
1480
self.approval_delay = datetime.timedelta(0, 0, 0, value)
2066
1482
# ApprovalDuration - property
2067
@dbus_service_property(_interface,
1483
@dbus_service_property(_interface, signature="t",
2069
1484
access="readwrite")
2070
1485
def ApprovalDuration_dbus_property(self, value=None):
2071
1486
if value is None: # get
2072
1487
return dbus.UInt64(self.approval_duration.total_seconds()
2074
1489
self.approval_duration = datetime.timedelta(0, 0, 0, value)
2076
1491
# Name - property
2078
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2079
1492
@dbus_service_property(_interface, signature="s", access="read")
2080
1493
def Name_dbus_property(self):
2081
1494
return dbus.String(self.name)
2085
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2086
@dbus_service_property(_interface, signature="s", access="read")
2087
def KeyID_dbus_property(self):
2088
return dbus.String(self.key_id)
2090
1496
# Fingerprint - property
2092
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2093
1497
@dbus_service_property(_interface, signature="s", access="read")
2094
1498
def Fingerprint_dbus_property(self):
2095
1499
return dbus.String(self.fingerprint)
2097
1501
# Host - property
2098
@dbus_service_property(_interface,
1502
@dbus_service_property(_interface, signature="s",
2100
1503
access="readwrite")
2101
1504
def Host_dbus_property(self, value=None):
2102
1505
if value is None: # get
2103
1506
return dbus.String(self.host)
2104
1507
self.host = str(value)
2106
1509
# Created - property
2108
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2109
1510
@dbus_service_property(_interface, signature="s", access="read")
2110
1511
def Created_dbus_property(self):
2111
1512
return datetime_to_dbus(self.created)
2113
1514
# LastEnabled - property
2114
1515
@dbus_service_property(_interface, signature="s", access="read")
2115
1516
def LastEnabled_dbus_property(self):
2116
1517
return datetime_to_dbus(self.last_enabled)
2118
1519
# Enabled - property
2119
@dbus_service_property(_interface,
1520
@dbus_service_property(_interface, signature="b",
2121
1521
access="readwrite")
2122
1522
def Enabled_dbus_property(self, value=None):
2123
1523
if value is None: # get
2405
1788
delay -= time2 - time
2408
session.send(client.secret)
2409
except gnutls.Error as error:
2410
logger.warning("gnutls send failed",
1791
while sent_size < len(client.secret):
1793
sent = session.send(client.secret[sent_size:])
1794
except gnutls.errors.GNUTLSError as error:
1795
logger.warning("gnutls send failed",
1798
logger.debug("Sent: %d, remaining: %d",
1799
sent, len(client.secret)
1800
- (sent_size + sent))
2414
1803
logger.info("Sending secret to %s", client.name)
2415
1804
# bump the timeout using extended_timeout
2416
1805
client.bump_timeout(client.extended_timeout)
2417
1806
if self.server.use_dbus:
2418
1807
# Emit D-Bus signal
2419
1808
client.GotSecret()
2422
1811
if approval_required:
2423
1812
client.approvals_pending -= 1
2426
except gnutls.Error as error:
1815
except gnutls.errors.GNUTLSError as error:
2427
1816
logger.warning("GnuTLS bye failed",
2428
1817
exc_info=error)
2431
1820
def peer_certificate(session):
2432
"Return the peer's certificate as a bytestring"
2434
cert_type = gnutls.certificate_type_get2(session._c_object,
2436
except AttributeError:
2437
cert_type = gnutls.certificate_type_get(session._c_object)
2438
if gnutls.has_rawpk:
2439
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2441
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2442
# If not a valid certificate type...
2443
if cert_type not in valid_cert_types:
2444
logger.info("Cert type %r not in %r", cert_type,
2446
# ...return invalid data
1821
"Return the peer's OpenPGP certificate as a bytestring"
1822
# If not an OpenPGP certificate...
1823
if (gnutls.library.functions
1824
.gnutls_certificate_type_get(session._c_object)
1825
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1826
# ...do the normal thing
1827
return session.peer_certificate
2448
1828
list_size = ctypes.c_uint(1)
2449
cert_list = (gnutls.certificate_get_peers
1829
cert_list = (gnutls.library.functions
1830
.gnutls_certificate_get_peers
2450
1831
(session._c_object, ctypes.byref(list_size)))
2451
1832
if not bool(cert_list) and list_size.value != 0:
2452
raise gnutls.Error("error getting peer certificate")
1833
raise gnutls.errors.GNUTLSError("error getting peer"
2453
1835
if list_size.value == 0:
2455
1837
cert = cert_list[0]
2456
1838
return ctypes.string_at(cert.data, cert.size)
2459
def key_id(certificate):
2460
"Convert a certificate bytestring to a hexdigit key ID"
2461
# New GnuTLS "datum" with the public key
2462
datum = gnutls.datum_t(
2463
ctypes.cast(ctypes.c_char_p(certificate),
2464
ctypes.POINTER(ctypes.c_ubyte)),
2465
ctypes.c_uint(len(certificate)))
2466
# XXX all these need to be created in the gnutls "module"
2467
# New empty GnuTLS certificate
2468
pubkey = gnutls.pubkey_t()
2469
gnutls.pubkey_init(ctypes.byref(pubkey))
2470
# Import the raw public key into the certificate
2471
gnutls.pubkey_import(pubkey,
2472
ctypes.byref(datum),
2473
gnutls.X509_FMT_DER)
2474
# New buffer for the key ID
2475
buf = ctypes.create_string_buffer(32)
2476
buf_len = ctypes.c_size_t(len(buf))
2477
# Get the key ID from the raw public key into the buffer
2478
gnutls.pubkey_get_key_id(
2480
gnutls.KEYID_USE_SHA256,
2481
ctypes.cast(ctypes.byref(buf),
2482
ctypes.POINTER(ctypes.c_ubyte)),
2483
ctypes.byref(buf_len))
2484
# Deinit the certificate
2485
gnutls.pubkey_deinit(pubkey)
2487
# Convert the buffer to a Python bytestring
2488
key_id = ctypes.string_at(buf, buf_len.value)
2489
# Convert the bytestring to hexadecimal notation
2490
hex_key_id = binascii.hexlify(key_id).upper()
2494
1841
def fingerprint(openpgp):
2495
1842
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2496
1843
# New GnuTLS "datum" with the OpenPGP public key
2497
datum = gnutls.datum_t(
2498
ctypes.cast(ctypes.c_char_p(openpgp),
2499
ctypes.POINTER(ctypes.c_ubyte)),
2500
ctypes.c_uint(len(openpgp)))
1844
datum = (gnutls.library.types
1845
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1848
ctypes.c_uint(len(openpgp))))
2501
1849
# New empty GnuTLS certificate
2502
crt = gnutls.openpgp_crt_t()
2503
gnutls.openpgp_crt_init(ctypes.byref(crt))
1850
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1851
(gnutls.library.functions
1852
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2504
1853
# Import the OpenPGP public key into the certificate
2505
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2506
gnutls.OPENPGP_FMT_RAW)
1854
(gnutls.library.functions
1855
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1856
gnutls.library.constants
1857
.GNUTLS_OPENPGP_FMT_RAW))
2507
1858
# Verify the self signature in the key
2508
1859
crtverify = ctypes.c_uint()
2509
gnutls.openpgp_crt_verify_self(crt, 0,
2510
ctypes.byref(crtverify))
1860
(gnutls.library.functions
1861
.gnutls_openpgp_crt_verify_self(crt, 0,
1862
ctypes.byref(crtverify)))
2511
1863
if crtverify.value != 0:
2512
gnutls.openpgp_crt_deinit(crt)
2513
raise gnutls.CertificateSecurityError(code
1864
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1865
raise (gnutls.errors.CertificateSecurityError
2515
1867
# New buffer for the fingerprint
2516
1868
buf = ctypes.create_string_buffer(20)
2517
1869
buf_len = ctypes.c_size_t()
2518
1870
# Get the fingerprint from the certificate into the buffer
2519
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2520
ctypes.byref(buf_len))
1871
(gnutls.library.functions
1872
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1873
ctypes.byref(buf_len)))
2521
1874
# Deinit the certificate
2522
gnutls.openpgp_crt_deinit(crt)
1875
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2523
1876
# Convert the buffer to a Python bytestring
2524
1877
fpr = ctypes.string_at(buf, buf_len.value)
2525
1878
# Convert the bytestring to hexadecimal notation
2614
1961
# socket_wrapper(), if socketfd was set.
2615
1962
socketserver.TCPServer.__init__(self, server_address,
2616
1963
RequestHandlerClass)
2618
1965
def server_bind(self):
2619
1966
"""This overrides the normal server_bind() function
2620
1967
to bind to an interface if one was specified, and also NOT to
2621
1968
bind to an address or port if they were not specified."""
2622
global SO_BINDTODEVICE
2623
1969
if self.interface is not None:
2624
1970
if SO_BINDTODEVICE is None:
2625
# Fall back to a hard-coded value which seems to be
2627
logger.warning("SO_BINDTODEVICE not found, trying 25")
2628
SO_BINDTODEVICE = 25
2630
self.socket.setsockopt(
2631
socket.SOL_SOCKET, SO_BINDTODEVICE,
2632
(self.interface + "\0").encode("utf-8"))
2633
except socket.error as error:
2634
if error.errno == errno.EPERM:
2635
logger.error("No permission to bind to"
2636
" interface %s", self.interface)
2637
elif error.errno == errno.ENOPROTOOPT:
2638
logger.error("SO_BINDTODEVICE not available;"
2639
" cannot bind to interface %s",
2641
elif error.errno == errno.ENODEV:
2642
logger.error("Interface %s does not exist,"
2643
" cannot bind", self.interface)
1971
logger.error("SO_BINDTODEVICE does not exist;"
1972
" cannot bind to interface %s",
1976
self.socket.setsockopt(socket.SOL_SOCKET,
1978
(self.interface + "\0")
1980
except socket.error as error:
1981
if error.errno == errno.EPERM:
1982
logger.error("No permission to bind to"
1983
" interface %s", self.interface)
1984
elif error.errno == errno.ENOPROTOOPT:
1985
logger.error("SO_BINDTODEVICE not available;"
1986
" cannot bind to interface %s",
1988
elif error.errno == errno.ENODEV:
1989
logger.error("Interface %s does not exist,"
1990
" cannot bind", self.interface)
2646
1993
# Only bind(2) the socket if we really need to.
2647
1994
if self.server_address[0] or self.server_address[1]:
2648
if self.server_address[1]:
2649
self.allow_reuse_address = True
2650
1995
if not self.server_address[0]:
2651
1996
if self.address_family == socket.AF_INET6:
2652
any_address = "::" # in6addr_any
1997
any_address = "::" # in6addr_any
2654
any_address = "0.0.0.0" # INADDR_ANY
1999
any_address = "0.0.0.0" # INADDR_ANY
2655
2000
self.server_address = (any_address,
2656
2001
self.server_address[1])
2657
2002
elif not self.server_address[1]:
2658
self.server_address = (self.server_address[0], 0)
2003
self.server_address = (self.server_address[0],
2659
2005
# if self.interface:
2660
2006
# self.server_address = (self.server_address[0],
2691
2032
self.gnutls_priority = gnutls_priority
2692
2033
IPv6_TCPServer.__init__(self, server_address,
2693
2034
RequestHandlerClass,
2694
interface=interface,
2035
interface = interface,
2036
use_ipv6 = use_ipv6,
2037
socketfd = socketfd)
2698
2038
def server_activate(self):
2699
2039
if self.enabled:
2700
2040
return socketserver.TCPServer.server_activate(self)
2702
2042
def enable(self):
2703
2043
self.enabled = True
2705
2045
def add_pipe(self, parent_pipe, proc):
2706
2046
# Call "handle_ipc" for both data and EOF events
2708
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2709
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2710
functools.partial(self.handle_ipc,
2711
parent_pipe=parent_pipe,
2714
def handle_ipc(self, source, condition,
2717
client_object=None):
2047
gobject.io_add_watch(parent_pipe.fileno(),
2048
gobject.IO_IN | gobject.IO_HUP,
2049
functools.partial(self.handle_ipc,
2054
def handle_ipc(self, source, condition, parent_pipe=None,
2055
proc = None, client_object=None):
2718
2056
# error, or the other end of multiprocessing.Pipe has closed
2719
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2057
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2720
2058
# Wait for other process to exit
2724
2062
# Read a request from the child
2725
2063
request = parent_pipe.recv()
2726
2064
command = request[0]
2728
2066
if command == 'init':
2729
key_id = request[1].decode("ascii")
2730
fpr = request[2].decode("ascii")
2731
address = request[3]
2733
for c in self.clients.values():
2734
if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"
2735
"27AE41E4649B934CA495991B7852B855"):
2737
if key_id and c.key_id == key_id:
2740
if fpr and c.fingerprint == fpr:
2068
address = request[2]
2070
for c in self.clients.itervalues():
2071
if c.fingerprint == fpr:
2744
logger.info("Client not found for key ID: %s, address"
2745
": %s", key_id or fpr, address)
2075
logger.info("Client not found for fingerprint: %s, ad"
2076
"dress: %s", fpr, address)
2746
2077
if self.use_dbus:
2747
2078
# Emit D-Bus signal
2748
mandos_dbus_service.ClientNotFound(key_id or fpr,
2079
mandos_dbus_service.ClientNotFound(fpr,
2750
2081
parent_pipe.send(False)
2754
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2755
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2756
functools.partial(self.handle_ipc,
2757
parent_pipe=parent_pipe,
2759
client_object=client))
2084
gobject.io_add_watch(parent_pipe.fileno(),
2085
gobject.IO_IN | gobject.IO_HUP,
2086
functools.partial(self.handle_ipc,
2760
2092
parent_pipe.send(True)
2761
2093
# remove the old hook in favor of the new above hook on
2765
2097
funcname = request[1]
2766
2098
args = request[2]
2767
2099
kwargs = request[3]
2769
2101
parent_pipe.send(('data', getattr(client_object,
2770
2102
funcname)(*args,
2773
2105
if command == 'getattr':
2774
2106
attrname = request[1]
2775
if isinstance(client_object.__getattribute__(attrname),
2776
collections.abc.Callable):
2777
parent_pipe.send(('function', ))
2107
if callable(client_object.__getattribute__(attrname)):
2108
parent_pipe.send(('function',))
2780
'data', client_object.__getattribute__(attrname)))
2110
parent_pipe.send(('data', client_object
2111
.__getattribute__(attrname)))
2782
2113
if command == 'setattr':
2783
2114
attrname = request[1]
2784
2115
value = request[2]
2785
2116
setattr(client_object, attrname, value)
2790
2121
def rfc3339_duration_to_delta(duration):
2791
2122
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2793
>>> timedelta = datetime.timedelta
2794
>>> rfc3339_duration_to_delta("P7D") == timedelta(7)
2796
>>> rfc3339_duration_to_delta("PT60S") == timedelta(0, 60)
2798
>>> rfc3339_duration_to_delta("PT60M") == timedelta(0, 3600)
2800
>>> rfc3339_duration_to_delta("PT24H") == timedelta(1)
2802
>>> rfc3339_duration_to_delta("P1W") == timedelta(7)
2804
>>> rfc3339_duration_to_delta("PT5M30S") == timedelta(0, 330)
2806
>>> rfc3339_duration_to_delta("P1DT3M20S") == timedelta(1, 200)
2124
>>> rfc3339_duration_to_delta("P7D")
2125
datetime.timedelta(7)
2126
>>> rfc3339_duration_to_delta("PT60S")
2127
datetime.timedelta(0, 60)
2128
>>> rfc3339_duration_to_delta("PT60M")
2129
datetime.timedelta(0, 3600)
2130
>>> rfc3339_duration_to_delta("PT24H")
2131
datetime.timedelta(1)
2132
>>> rfc3339_duration_to_delta("P1W")
2133
datetime.timedelta(7)
2134
>>> rfc3339_duration_to_delta("PT5M30S")
2135
datetime.timedelta(0, 330)
2136
>>> rfc3339_duration_to_delta("P1DT3M20S")
2137
datetime.timedelta(1, 200)
2811
2140
# Parsing an RFC 3339 duration with regular expressions is not
2812
2141
# possible - there would have to be multiple places for the same
2813
2142
# values, like seconds. The current code, while more esoteric, is
2814
2143
# cleaner without depending on a parsing library. If Python had a
2815
2144
# built-in library for parsing we would use it, but we'd like to
2816
2145
# avoid excessive use of external libraries.
2818
2147
# New type for defining tokens, syntax, and semantics all-in-one
2819
Token = collections.namedtuple("Token", (
2820
"regexp", # To match token; if "value" is not None, must have
2821
# a "group" containing digits
2822
"value", # datetime.timedelta or None
2823
"followers")) # Tokens valid after this token
2148
Token = collections.namedtuple("Token",
2149
("regexp", # To match token; if
2150
# "value" is not None,
2151
# must have a "group"
2153
"value", # datetime.timedelta or
2155
"followers")) # Tokens valid after
2824
2157
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2825
2158
# the "duration" ABNF definition in RFC 3339, Appendix A.
2826
2159
token_end = Token(re.compile(r"$"), None, frozenset())
2827
2160
token_second = Token(re.compile(r"(\d+)S"),
2828
2161
datetime.timedelta(seconds=1),
2829
frozenset((token_end, )))
2162
frozenset((token_end,)))
2830
2163
token_minute = Token(re.compile(r"(\d+)M"),
2831
2164
datetime.timedelta(minutes=1),
2832
2165
frozenset((token_second, token_end)))
3164
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3166
2494
except OSError as error:
3167
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3168
.format(uid, gid, os.strerror(error.errno)))
3169
2495
if error.errno != errno.EPERM:
3173
2499
# Enable all possible GnuTLS debugging
3175
2501
# "Use a log level over 10 to enable all debugging options."
3176
2502
# - GnuTLS manual
3177
gnutls.global_set_log_level(11)
2503
gnutls.library.functions.gnutls_global_set_log_level(11)
2505
@gnutls.library.types.gnutls_log_func
3180
2506
def debug_gnutls(level, string):
3181
2507
logger.debug("GnuTLS: %s", string[:-1])
3183
gnutls.global_set_log_function(debug_gnutls)
2509
(gnutls.library.functions
2510
.gnutls_global_set_log_function(debug_gnutls))
3185
2512
# Redirect stdin so all checkers get /dev/null
3186
2513
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
3187
2514
os.dup2(null, sys.stdin.fileno())
3191
2518
# Need to fork before connecting to D-Bus
3192
2519
if not foreground:
3193
2520
# Close all input and output, do double fork, etc.
3196
if gi.version_info < (3, 10, 2):
3197
# multiprocessing will use threads, so before we use GLib we
3198
# need to inform GLib that threads will be used.
2523
# multiprocessing will use threads, so before we use gobject we
2524
# need to inform gobject that threads will be used.
2525
gobject.threads_init()
3201
2527
global main_loop
3202
2528
# From the Avahi example code
3203
2529
DBusGMainLoop(set_as_default=True)
3204
main_loop = GLib.MainLoop()
2530
main_loop = gobject.MainLoop()
3205
2531
bus = dbus.SystemBus()
3206
2532
# End of Avahi example code
3209
2535
bus_name = dbus.service.BusName("se.recompile.Mandos",
3212
old_bus_name = dbus.service.BusName(
3213
"se.bsnet.fukt.Mandos", bus,
3215
except dbus.exceptions.DBusException as e:
2536
bus, do_not_queue=True)
2537
old_bus_name = (dbus.service.BusName
2538
("se.bsnet.fukt.Mandos", bus,
2540
except dbus.exceptions.NameExistsException as e:
3216
2541
logger.error("Disabling D-Bus:", exc_info=e)
3217
2542
use_dbus = False
3218
2543
server_settings["use_dbus"] = False
3219
2544
tcp_server.use_dbus = False
3221
2546
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3222
service = AvahiServiceToSyslog(
3223
name=server_settings["servicename"],
3224
servicetype="_mandos._tcp",
2547
service = AvahiServiceToSyslog(name =
2548
server_settings["servicename"],
2549
servicetype = "_mandos._tcp",
2550
protocol = protocol, bus = bus)
3227
2551
if server_settings["interface"]:
3228
service.interface = if_nametoindex(
3229
server_settings["interface"].encode("utf-8"))
2552
service.interface = (if_nametoindex
2553
(server_settings["interface"]
3231
2556
global multiprocessing_manager
3232
2557
multiprocessing_manager = multiprocessing.Manager()
3234
2559
client_class = Client
3236
client_class = functools.partial(ClientDBus, bus=bus)
2561
client_class = functools.partial(ClientDBus, bus = bus)
3238
2563
client_settings = Client.config_parser(client_config)
3239
2564
old_client_settings = {}
3240
2565
clients_data = {}
3242
2567
# This is used to redirect stdout and stderr for checker processes
3244
wnull = open(os.devnull, "w") # A writable /dev/null
2569
wnull = open(os.devnull, "w") # A writable /dev/null
3245
2570
# Only used if server is running in foreground but not in debug
3247
2572
if debug or not foreground:
3250
2575
# Get client data and settings from last running state.
3251
2576
if server_settings["restore"]:
3253
2578
with open(stored_state_path, "rb") as stored_state:
3254
if sys.version_info.major == 2:
3255
clients_data, old_client_settings = pickle.load(
3258
bytes_clients_data, bytes_old_client_settings = (
3259
pickle.load(stored_state, encoding="bytes"))
3260
# Fix bytes to strings
3263
clients_data = {(key.decode("utf-8")
3264
if isinstance(key, bytes)
3267
bytes_clients_data.items()}
3268
del bytes_clients_data
3269
for key in clients_data:
3270
value = {(k.decode("utf-8")
3271
if isinstance(k, bytes) else k): v
3273
clients_data[key].items()}
3274
clients_data[key] = value
3276
value["client_structure"] = [
3278
if isinstance(s, bytes)
3280
value["client_structure"]]
3281
# .name, .host, and .checker_command
3282
for k in ("name", "host", "checker_command"):
3283
if isinstance(value[k], bytes):
3284
value[k] = value[k].decode("utf-8")
3285
if "key_id" not in value:
3286
value["key_id"] = ""
3287
elif "fingerprint" not in value:
3288
value["fingerprint"] = ""
3289
# old_client_settings
3291
old_client_settings = {
3292
(key.decode("utf-8")
3293
if isinstance(key, bytes)
3296
bytes_old_client_settings.items()}
3297
del bytes_old_client_settings
3298
# .host and .checker_command
3299
for value in old_client_settings.values():
3300
for attribute in ("host", "checker_command"):
3301
if isinstance(value[attribute], bytes):
3302
value[attribute] = (value[attribute]
2579
clients_data, old_client_settings = (pickle.load
3304
2581
os.remove(stored_state_path)
3305
2582
except IOError as e:
3306
2583
if e.errno == errno.ENOENT:
3307
logger.warning("Could not load persistent state:"
3308
" {}".format(os.strerror(e.errno)))
2584
logger.warning("Could not load persistent state: {}"
2585
.format(os.strerror(e.errno)))
3310
2587
logger.critical("Could not load persistent state:",
3313
2590
except EOFError as e:
3314
2591
logger.warning("Could not load persistent state: "
2592
"EOFError:", exc_info=e)
3318
2594
with PGPEngine() as pgp:
3319
2595
for client_name, client in clients_data.items():
3320
2596
# Skip removed clients
3321
2597
if client_name not in client_settings:
3324
2600
# Decide which value to use after restoring saved state.
3325
2601
# We have three different values: Old config file,
3326
2602
# new config file, and saved state.
3384
2660
for client_name in (set(client_settings)
3385
2661
- set(old_client_settings)):
3386
2662
clients_data[client_name] = client_settings[client_name]
3388
2664
# Create all client objects
3389
2665
for client_name, client in clients_data.items():
3390
2666
tcp_server.clients[client_name] = client_class(
3393
server_settings=server_settings)
2667
name = client_name, settings = client,
2668
server_settings = server_settings)
3395
2670
if not tcp_server.clients:
3396
2671
logger.warning("No clients defined")
3398
2673
if not foreground:
3399
2674
if pidfile is not None:
3403
print(pid, file=pidfile)
2678
pidfile.write("{}\n".format(pid).encode("utf-8"))
3404
2679
except IOError:
3405
2680
logger.error("Could not write to file %r with PID %d",
3406
2681
pidfilename, pid)
3408
2683
del pidfilename
3410
for termsig in (signal.SIGHUP, signal.SIGTERM):
3411
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3412
lambda: main_loop.quit() and False)
2685
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2686
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3416
@alternate_dbus_interfaces(
3417
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3418
class MandosDBusService(DBusObjectWithObjectManager):
2689
@alternate_dbus_interfaces({"se.recompile.Mandos":
2690
"se.bsnet.fukt.Mandos"})
2691
class MandosDBusService(DBusObjectWithProperties):
3419
2692
"""A D-Bus proxy object"""
3421
2693
def __init__(self):
3422
2694
dbus.service.Object.__init__(self, bus, "/")
3424
2695
_interface = "se.recompile.Mandos"
2697
@dbus_interface_annotations(_interface)
2699
return { "org.freedesktop.DBus.Property"
2700
".EmitsChangedSignal":
3426
2703
@dbus.service.signal(_interface, signature="o")
3427
2704
def ClientAdded(self, objpath):
3431
2708
@dbus.service.signal(_interface, signature="ss")
3432
def ClientNotFound(self, key_id, address):
2709
def ClientNotFound(self, fingerprint, address):
3436
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3438
2713
@dbus.service.signal(_interface, signature="os")
3439
2714
def ClientRemoved(self, objpath, name):
3443
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3445
2718
@dbus.service.method(_interface, out_signature="ao")
3446
2719
def GetAllClients(self):
3448
return dbus.Array(c.dbus_object_path for c in
3449
tcp_server.clients.values())
3451
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2721
return dbus.Array(c.dbus_object_path
2723
tcp_server.clients.itervalues())
3453
2725
@dbus.service.method(_interface,
3454
2726
out_signature="a{oa{sv}}")
3455
2727
def GetAllClientsWithProperties(self):
3457
2729
return dbus.Dictionary(
3458
{c.dbus_object_path: c.GetAll(
3459
"se.recompile.Mandos.Client")
3460
for c in tcp_server.clients.values()},
2730
{ c.dbus_object_path: c.GetAll("")
2731
for c in tcp_server.clients.itervalues() },
3461
2732
signature="oa{sv}")
3463
2734
@dbus.service.method(_interface, in_signature="o")
3464
2735
def RemoveClient(self, object_path):
3466
for c in tcp_server.clients.values():
2737
for c in tcp_server.clients.itervalues():
3467
2738
if c.dbus_object_path == object_path:
3468
2739
del tcp_server.clients[c.name]
3469
2740
c.remove_from_connection()
3470
# Don't signal the disabling
2741
# Don't signal anything except ClientRemoved
3471
2742
c.disable(quiet=True)
3472
# Emit D-Bus signal for removal
3473
self.client_removed_signal(c)
2744
self.ClientRemoved(object_path, c.name)
3475
2746
raise KeyError(object_path)
3479
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3480
out_signature="a{oa{sa{sv}}}")
3481
def GetManagedObjects(self):
3483
return dbus.Dictionary(
3484
{client.dbus_object_path:
3486
{interface: client.GetAll(interface)
3488
client._get_all_interface_names()})
3489
for client in tcp_server.clients.values()})
3491
def client_added_signal(self, client):
3492
"""Send the new standard signal and the old signal"""
3494
# New standard signal
3495
self.InterfacesAdded(
3496
client.dbus_object_path,
3498
{interface: client.GetAll(interface)
3500
client._get_all_interface_names()}))
3502
self.ClientAdded(client.dbus_object_path)
3504
def client_removed_signal(self, client):
3505
"""Send the new standard signal and the old signal"""
3507
# New standard signal
3508
self.InterfacesRemoved(
3509
client.dbus_object_path,
3510
client._get_all_interface_names())
3512
self.ClientRemoved(client.dbus_object_path,
3515
2750
mandos_dbus_service = MandosDBusService()
3517
# Save modules to variables to exempt the modules from being
3518
# unloaded before the function registered with atexit() is run.
3519
mp = multiprocessing
3523
2753
"Cleanup function; run on exit"
3525
2755
service.cleanup()
3527
mp.active_children()
2757
multiprocessing.active_children()
3529
2759
if not (tcp_server.clients or client_settings):
3532
2762
# Store client before exiting. Secrets are encrypted with key
3533
2763
# based on what config file has. If config file is
3534
2764
# removed/edited, old secret will thus be unrecovable.
3536
2766
with PGPEngine() as pgp:
3537
for client in tcp_server.clients.values():
2767
for client in tcp_server.clients.itervalues():
3538
2768
key = client_settings[client.name]["secret"]
3539
2769
client.encrypted_secret = pgp.encrypt(client.secret,
3541
2771
client_dict = {}
3543
2773
# A list of attributes that can not be pickled
3545
exclude = {"bus", "changedstate", "secret",
3546
"checker", "server_settings"}
3547
for name, typ in inspect.getmembers(dbus.service
2775
exclude = { "bus", "changedstate", "secret",
2776
"checker", "server_settings" }
2777
for name, typ in (inspect.getmembers
2778
(dbus.service.Object)):
3549
2779
exclude.add(name)
3551
2781
client_dict["encrypted_secret"] = (client
3552
2782
.encrypted_secret)
3553
2783
for attr in client.client_structure:
3554
2784
if attr not in exclude:
3555
2785
client_dict[attr] = getattr(client, attr)
3557
2787
clients[client.name] = client_dict
3558
2788
del client_settings[client.name]["secret"]
3561
with tempfile.NamedTemporaryFile(
3565
dir=os.path.dirname(stored_state_path),
3566
delete=False) as stored_state:
3567
pickle.dump((clients, client_settings), stored_state,
3569
tempname = stored_state.name
2791
with (tempfile.NamedTemporaryFile
2792
(mode='wb', suffix=".pickle", prefix='clients-',
2793
dir=os.path.dirname(stored_state_path),
2794
delete=False)) as stored_state:
2795
pickle.dump((clients, client_settings), stored_state)
2796
tempname=stored_state.name
3570
2797
os.rename(tempname, stored_state_path)
3571
2798
except (IOError, OSError) as e: