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# -*- 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.
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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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# <http://avahi.org/wiki/PythonPublishExample>. This includes the
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# methods "add", "remove", "server_state_changed",
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# "entry_group_state_changed", "cleanup", and "activate" in the
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# "AvahiService" class, and some lines in "main".
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# 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
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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
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# Copyright © 2008-2014 Björn Påhlsson
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# 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
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19
# the Free Software Foundation, either version 3 of the License, or
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20
# (at your option) any later version.
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# 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,
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# 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
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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
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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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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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+ 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
271
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,
281
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
292
"""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 = "/"
303
def string_array_to_txt_array(t):
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return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
305
for s in t), signature="ay")
306
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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def __init__(self, value, *args, **kwargs):
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self.value = value
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return super(AvahiError, self).__init__(value, *args,
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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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399
class AvahiServiceToSyslog(AvahiService):
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def rename(self, *args, **kwargs):
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"""Add the new name to the syslog messages"""
511
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
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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, *args, **kwargs)
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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
520
"""This isn't so much a class as it is a module-like namespace."""
522
library = ctypes.util.find_library("gnutls")
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library = ctypes.util.find_library("gnutls-deb0")
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_library = ctypes.cdll.LoadLibrary(library)
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# Unless otherwise indicated, the constants and types below are
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# all from the gnutls/gnutls.h C header file.
540
E_NO_CERTIFICATE_FOUND = -49
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KEYID_USE_SHA256 = 1 # gnutls/x509.h
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OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
549
class session_int(ctypes.Structure):
551
session_t = ctypes.POINTER(session_int)
553
class certificate_credentials_st(ctypes.Structure):
555
certificate_credentials_t = ctypes.POINTER(
556
certificate_credentials_st)
557
certificate_type_t = ctypes.c_int
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class datum_t(ctypes.Structure):
560
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
561
('size', ctypes.c_uint)]
563
class openpgp_crt_int(ctypes.Structure):
565
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
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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)
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credentials_type_t = ctypes.c_int
569
transport_ptr_t = ctypes.c_void_p
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close_request_t = ctypes.c_int
573
class Error(Exception):
574
def __init__(self, message=None, code=None, args=()):
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# Default usage is by a message string, but if a return
576
# code is passed, convert it to a string with
579
if message is None and code is not None:
580
message = gnutls.strerror(code)
581
return super(gnutls.Error, self).__init__(
584
class CertificateSecurityError(Error):
590
self._c_object = gnutls.certificate_credentials_t()
591
gnutls.certificate_allocate_credentials(
592
ctypes.byref(self._c_object))
593
self.type = gnutls.CRD_CERTIFICATE
596
gnutls.certificate_free_credentials(self._c_object)
599
def __init__(self, socket, credentials=None):
600
self._c_object = gnutls.session_t()
601
gnutls_flags = gnutls.CLIENT
602
if gnutls.check_version(b"3.5.6"):
603
gnutls_flags |= gnutls.NO_TICKETS
605
gnutls_flags |= gnutls.ENABLE_RAWPK
606
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
608
gnutls.set_default_priority(self._c_object)
609
gnutls.transport_set_ptr(self._c_object, socket.fileno())
610
gnutls.handshake_set_private_extensions(self._c_object,
613
if credentials is None:
614
credentials = gnutls.Credentials()
615
gnutls.credentials_set(self._c_object, credentials.type,
616
ctypes.cast(credentials._c_object,
618
self.credentials = credentials
621
gnutls.deinit(self._c_object)
624
return gnutls.handshake(self._c_object)
626
def send(self, data):
630
data_len -= gnutls.record_send(self._c_object,
635
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
637
# Error handling functions
638
def _error_code(result):
639
"""A function to raise exceptions on errors, suitable
640
for the 'restype' attribute on ctypes functions"""
643
if result == gnutls.E_NO_CERTIFICATE_FOUND:
644
raise gnutls.CertificateSecurityError(code=result)
645
raise gnutls.Error(code=result)
647
def _retry_on_error(result, func, arguments):
648
"""A function to retry on some errors, suitable
649
for the 'errcheck' attribute on ctypes functions"""
651
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
652
return _error_code(result)
653
result = func(*arguments)
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# Unless otherwise indicated, the function declarations below are
657
# all from the gnutls/gnutls.h C header file.
660
priority_set_direct = _library.gnutls_priority_set_direct
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priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
662
ctypes.POINTER(ctypes.c_char_p)]
663
priority_set_direct.restype = _error_code
665
init = _library.gnutls_init
666
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
667
init.restype = _error_code
669
set_default_priority = _library.gnutls_set_default_priority
670
set_default_priority.argtypes = [session_t]
671
set_default_priority.restype = _error_code
673
record_send = _library.gnutls_record_send
674
record_send.argtypes = [session_t, ctypes.c_void_p,
676
record_send.restype = ctypes.c_ssize_t
677
record_send.errcheck = _retry_on_error
679
certificate_allocate_credentials = (
680
_library.gnutls_certificate_allocate_credentials)
681
certificate_allocate_credentials.argtypes = [
682
ctypes.POINTER(certificate_credentials_t)]
683
certificate_allocate_credentials.restype = _error_code
685
certificate_free_credentials = (
686
_library.gnutls_certificate_free_credentials)
687
certificate_free_credentials.argtypes = [
688
certificate_credentials_t]
689
certificate_free_credentials.restype = None
691
handshake_set_private_extensions = (
692
_library.gnutls_handshake_set_private_extensions)
693
handshake_set_private_extensions.argtypes = [session_t,
695
handshake_set_private_extensions.restype = None
697
credentials_set = _library.gnutls_credentials_set
698
credentials_set.argtypes = [session_t, credentials_type_t,
700
credentials_set.restype = _error_code
702
strerror = _library.gnutls_strerror
703
strerror.argtypes = [ctypes.c_int]
704
strerror.restype = ctypes.c_char_p
706
certificate_type_get = _library.gnutls_certificate_type_get
707
certificate_type_get.argtypes = [session_t]
708
certificate_type_get.restype = _error_code
710
certificate_get_peers = _library.gnutls_certificate_get_peers
711
certificate_get_peers.argtypes = [session_t,
712
ctypes.POINTER(ctypes.c_uint)]
713
certificate_get_peers.restype = ctypes.POINTER(datum_t)
715
global_set_log_level = _library.gnutls_global_set_log_level
716
global_set_log_level.argtypes = [ctypes.c_int]
717
global_set_log_level.restype = None
719
global_set_log_function = _library.gnutls_global_set_log_function
720
global_set_log_function.argtypes = [log_func]
721
global_set_log_function.restype = None
723
deinit = _library.gnutls_deinit
724
deinit.argtypes = [session_t]
725
deinit.restype = None
727
handshake = _library.gnutls_handshake
728
handshake.argtypes = [session_t]
729
handshake.restype = _error_code
730
handshake.errcheck = _retry_on_error
732
transport_set_ptr = _library.gnutls_transport_set_ptr
733
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
734
transport_set_ptr.restype = None
736
bye = _library.gnutls_bye
737
bye.argtypes = [session_t, close_request_t]
738
bye.restype = _error_code
739
bye.errcheck = _retry_on_error
741
check_version = _library.gnutls_check_version
742
check_version.argtypes = [ctypes.c_char_p]
743
check_version.restype = ctypes.c_char_p
745
_need_version = b"3.3.0"
746
if check_version(_need_version) is None:
747
raise self.Error("Needs GnuTLS {} or later"
748
.format(_need_version))
750
_tls_rawpk_version = b"3.6.6"
751
has_rawpk = bool(check_version(_tls_rawpk_version))
755
class pubkey_st(ctypes.Structure):
757
pubkey_t = ctypes.POINTER(pubkey_st)
759
x509_crt_fmt_t = ctypes.c_int
761
# All the function declarations below are from gnutls/abstract.h
762
pubkey_init = _library.gnutls_pubkey_init
763
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
764
pubkey_init.restype = _error_code
766
pubkey_import = _library.gnutls_pubkey_import
767
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
769
pubkey_import.restype = _error_code
771
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
772
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
773
ctypes.POINTER(ctypes.c_ubyte),
774
ctypes.POINTER(ctypes.c_size_t)]
775
pubkey_get_key_id.restype = _error_code
777
pubkey_deinit = _library.gnutls_pubkey_deinit
778
pubkey_deinit.argtypes = [pubkey_t]
779
pubkey_deinit.restype = None
781
# All the function declarations below are from gnutls/openpgp.h
783
openpgp_crt_init = _library.gnutls_openpgp_crt_init
784
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
785
openpgp_crt_init.restype = _error_code
787
openpgp_crt_import = _library.gnutls_openpgp_crt_import
788
openpgp_crt_import.argtypes = [openpgp_crt_t,
789
ctypes.POINTER(datum_t),
791
openpgp_crt_import.restype = _error_code
793
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
794
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
795
ctypes.POINTER(ctypes.c_uint)]
796
openpgp_crt_verify_self.restype = _error_code
798
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
799
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
800
openpgp_crt_deinit.restype = None
802
openpgp_crt_get_fingerprint = (
803
_library.gnutls_openpgp_crt_get_fingerprint)
804
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
808
openpgp_crt_get_fingerprint.restype = _error_code
810
if check_version(b"3.6.4"):
811
certificate_type_get2 = _library.gnutls_certificate_type_get2
812
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
813
certificate_type_get2.restype = _error_code
815
# Remove non-public functions
816
del _error_code, _retry_on_error
819
def call_pipe(connection, # : multiprocessing.Connection
820
func, *args, **kwargs):
821
"""This function is meant to be called by multiprocessing.Process
823
This function runs func(*args, **kwargs), and writes the resulting
824
return value on the provided multiprocessing.Connection.
826
connection.send(func(*args, **kwargs))
410
class Client(object):
831
411
"""A representation of a client host served by this server.
834
414
approved: bool(); 'None' if not yet approved/disapproved
835
415
approval_delay: datetime.timedelta(); Time to wait for approval
836
416
approval_duration: datetime.timedelta(); Duration of one approval
837
checker: multiprocessing.Process(); a running checker process used
838
to see if the client lives. 'None' if no process is
840
checker_callback_tag: a GLib event source tag, or None
417
checker: subprocess.Popen(); a running checker process used
418
to see if the client lives.
419
'None' if no process is running.
420
checker_callback_tag: a gobject event source tag, or None
841
421
checker_command: string; External command which is run to check
842
422
if client lives. %() expansions are done at
843
423
runtime with vars(self) as dict, so that for
844
424
instance %(name)s can be used in the command.
845
checker_initiator_tag: a GLib event source tag, or None
425
checker_initiator_tag: a gobject event source tag, or None
846
426
created: datetime.datetime(); (UTC) object creation
847
427
client_structure: Object describing what attributes a client has
848
428
and is used for storing the client at exit
849
429
current_checker_command: string; current running checker_command
850
disable_initiator_tag: a GLib event source tag, or None
430
disable_initiator_tag: a gobject event source tag, or None
852
432
fingerprint: string (40 or 32 hexadecimal digits); used to
853
uniquely identify an OpenPGP client
854
key_id: string (64 hexadecimal digits); used to uniquely identify
855
a client using raw public keys
433
uniquely identify the client
856
434
host: string; available for use by the checker command
857
435
interval: datetime.timedelta(); How often to start a new checker
858
436
last_approval_request: datetime.datetime(); (UTC) or None
1015
588
logger.info("Disabling client %s", self.name)
1016
589
if getattr(self, "disable_initiator_tag", None) is not None:
1017
GLib.source_remove(self.disable_initiator_tag)
590
gobject.source_remove(self.disable_initiator_tag)
1018
591
self.disable_initiator_tag = None
1019
592
self.expires = None
1020
593
if getattr(self, "checker_initiator_tag", None) is not None:
1021
GLib.source_remove(self.checker_initiator_tag)
594
gobject.source_remove(self.checker_initiator_tag)
1022
595
self.checker_initiator_tag = None
1023
596
self.stop_checker()
1024
597
self.enabled = False
1026
599
self.send_changedstate()
1027
# Do not run this again if called by a GLib.timeout_add
600
# Do not run this again if called by a gobject.timeout_add
1030
603
def __del__(self):
1033
606
def init_checker(self):
1034
607
# Schedule a new checker to be started an 'interval' from now,
1035
608
# and every interval from then on.
1036
609
if self.checker_initiator_tag is not None:
1037
GLib.source_remove(self.checker_initiator_tag)
1038
self.checker_initiator_tag = GLib.timeout_add(
1039
random.randrange(int(self.interval.total_seconds() * 1000
610
gobject.source_remove(self.checker_initiator_tag)
611
self.checker_initiator_tag = (gobject.timeout_add
613
.total_seconds() * 1000),
1042
615
# Schedule a disable() when 'timeout' has passed
1043
616
if self.disable_initiator_tag is not None:
1044
GLib.source_remove(self.disable_initiator_tag)
1045
self.disable_initiator_tag = GLib.timeout_add(
1046
int(self.timeout.total_seconds() * 1000), self.disable)
617
gobject.source_remove(self.disable_initiator_tag)
618
self.disable_initiator_tag = (gobject.timeout_add
620
.total_seconds() * 1000),
1047
622
# Also start a new checker *right now*.
1048
623
self.start_checker()
1050
def checker_callback(self, source, condition, connection,
625
def checker_callback(self, pid, condition, command):
1052
626
"""The checker has completed, so take appropriate actions."""
1053
# Read return code from connection (see call_pipe)
1054
returncode = connection.recv()
1056
if self.checker is not None:
1058
627
self.checker_callback_tag = None
1059
628
self.checker = None
1062
self.last_checker_status = returncode
1063
self.last_checker_signal = None
629
if os.WIFEXITED(condition):
630
self.last_checker_status = os.WEXITSTATUS(condition)
1064
631
if self.last_checker_status == 0:
1065
632
logger.info("Checker for %(name)s succeeded",
1067
634
self.checked_ok()
1069
logger.info("Checker for %(name)s failed", vars(self))
636
logger.info("Checker for %(name)s failed",
1071
639
self.last_checker_status = -1
1072
self.last_checker_signal = -returncode
1073
640
logger.warning("Checker for %(name)s crashed?",
1077
643
def checked_ok(self):
1078
644
"""Assert that the client has been seen, alive and well."""
1079
645
self.last_checked_ok = datetime.datetime.utcnow()
1080
646
self.last_checker_status = 0
1081
self.last_checker_signal = None
1082
647
self.bump_timeout()
1084
649
def bump_timeout(self, timeout=None):
1085
650
"""Bump up the timeout for this client."""
1086
651
if timeout is None:
1087
652
timeout = self.timeout
1088
653
if self.disable_initiator_tag is not None:
1089
GLib.source_remove(self.disable_initiator_tag)
654
gobject.source_remove(self.disable_initiator_tag)
1090
655
self.disable_initiator_tag = None
1091
656
if getattr(self, "enabled", False):
1092
self.disable_initiator_tag = GLib.timeout_add(
1093
int(timeout.total_seconds() * 1000), self.disable)
657
self.disable_initiator_tag = (gobject.timeout_add
658
(int(timeout.total_seconds()
659
* 1000), self.disable))
1094
660
self.expires = datetime.datetime.utcnow() + timeout
1096
662
def need_approval(self):
1097
663
self.last_approval_request = datetime.datetime.utcnow()
1099
665
def start_checker(self):
1100
666
"""Start a new checker subprocess if one is not running.
1102
668
If a checker already exists, leave it running and do
1104
670
# The reason for not killing a running checker is that if we
1109
675
# checkers alone, the checker would have to take more time
1110
676
# than 'timeout' for the client to be disabled, which is as it
1113
if self.checker is not None and not self.checker.is_alive():
1114
logger.warning("Checker was not alive; joining")
679
# If a checker exists, make sure it is not a zombie
681
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
682
except AttributeError:
684
except OSError as error:
685
if error.errno != errno.ECHILD:
689
logger.warning("Checker was a zombie")
690
gobject.source_remove(self.checker_callback_tag)
691
self.checker_callback(pid, status,
692
self.current_checker_command)
1117
693
# Start a new checker if needed
1118
694
if self.checker is None:
1119
695
# Escape attributes for the shell
1121
attr: re.escape(str(getattr(self, attr)))
1122
for attr in self.runtime_expansions}
696
escaped_attrs = { attr:
697
re.escape(str(getattr(self, attr)))
698
for attr in self.runtime_expansions }
1124
700
command = self.checker_command % escaped_attrs
1125
701
except TypeError as error:
1126
702
logger.error('Could not format string "%s"',
1127
self.checker_command,
703
self.checker_command, exc_info=error)
704
return True # Try again later
705
self.current_checker_command = command
707
logger.info("Starting checker %r for %s",
709
# We don't need to redirect stdout and stderr, since
710
# in normal mode, that is already done by daemon(),
711
# and in debug mode we don't want to. (Stdin is
712
# always replaced by /dev/null.)
713
# The exception is when not debugging but nevertheless
714
# running in the foreground; use the previously
717
if (not self.server_settings["debug"]
718
and self.server_settings["foreground"]):
719
popen_args.update({"stdout": wnull,
721
self.checker = subprocess.Popen(command,
725
except OSError as error:
726
logger.error("Failed to start subprocess",
1129
return True # Try again later
1130
self.current_checker_command = command
1131
logger.info("Starting checker %r for %s", command,
1133
# We don't need to redirect stdout and stderr, since
1134
# in normal mode, that is already done by daemon(),
1135
# and in debug mode we don't want to. (Stdin is
1136
# always replaced by /dev/null.)
1137
# The exception is when not debugging but nevertheless
1138
# running in the foreground; use the previously
1140
popen_args = {"close_fds": True,
1143
if (not self.server_settings["debug"]
1144
and self.server_settings["foreground"]):
1145
popen_args.update({"stdout": wnull,
1147
pipe = multiprocessing.Pipe(duplex=False)
1148
self.checker = multiprocessing.Process(
1150
args=(pipe[1], subprocess.call, command),
1152
self.checker.start()
1153
self.checker_callback_tag = GLib.io_add_watch(
1154
GLib.IOChannel.unix_new(pipe[0].fileno()),
1155
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
1156
self.checker_callback, pipe[0], command)
1157
# Re-run this periodically if run by GLib.timeout_add
729
self.checker_callback_tag = (gobject.child_watch_add
731
self.checker_callback,
733
# The checker may have completed before the gobject
734
# watch was added. Check for this.
736
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
737
except OSError as error:
738
if error.errno == errno.ECHILD:
739
# This should never happen
740
logger.error("Child process vanished",
745
gobject.source_remove(self.checker_callback_tag)
746
self.checker_callback(pid, status, command)
747
# Re-run this periodically if run by gobject.timeout_add
1160
750
def stop_checker(self):
1161
751
"""Force the checker process, if any, to stop."""
1162
752
if self.checker_callback_tag:
1163
GLib.source_remove(self.checker_callback_tag)
753
gobject.source_remove(self.checker_callback_tag)
1164
754
self.checker_callback_tag = None
1165
755
if getattr(self, "checker", None) is None:
1167
757
logger.debug("Stopping checker for %(name)s", vars(self))
1168
self.checker.terminate()
759
self.checker.terminate()
761
#if self.checker.poll() is None:
762
# self.checker.kill()
763
except OSError as error:
764
if error.errno != errno.ESRCH: # No such process
1169
766
self.checker = None
1172
def dbus_service_property(dbus_interface,
769
def dbus_service_property(dbus_interface, signature="v",
770
access="readwrite", byte_arrays=False):
1176
771
"""Decorators for marking methods of a DBusObjectWithProperties to
1177
772
become properties on the D-Bus.
1179
774
The decorated method will be called with no arguments by "Get"
1180
775
and with one argument by "Set".
1182
777
The parameters, where they are supported, are the same as
1183
778
dbus.service.method, except there is only "signature", since the
1184
779
type from Get() and the type sent to Set() is the same.
1267
class DBusObjectWithAnnotations(dbus.service.Object):
1268
"""A D-Bus object with annotations.
1270
Classes inheriting from this can use the dbus_annotations
1271
decorator to add annotations to methods or signals.
853
class DBusObjectWithProperties(dbus.service.Object):
854
"""A D-Bus object with properties.
856
Classes inheriting from this can use the dbus_service_property
857
decorator to expose methods as D-Bus properties. It exposes the
858
standard Get(), Set(), and GetAll() methods on the D-Bus.
1275
862
def _is_dbus_thing(thing):
1276
863
"""Returns a function testing if an attribute is a D-Bus thing
1278
865
If called like _is_dbus_thing("method") it returns a function
1279
866
suitable for use as predicate to inspect.getmembers().
1281
868
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1284
871
def _get_all_dbus_things(self, thing):
1285
872
"""Returns a generator of (name, attribute) pairs
1287
return ((getattr(athing.__get__(self), "_dbus_name", name),
874
return ((getattr(athing.__get__(self), "_dbus_name",
1288
876
athing.__get__(self))
1289
877
for cls in self.__class__.__mro__
1290
878
for name, athing in
1291
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1293
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1295
path_keyword='object_path',
1296
connection_keyword='connection')
1297
def Introspect(self, object_path, connection):
1298
"""Overloading of standard D-Bus method.
1300
Inserts annotation tags on methods and signals.
1302
xmlstring = dbus.service.Object.Introspect(self, object_path,
1305
document = xml.dom.minidom.parseString(xmlstring)
1307
for if_tag in document.getElementsByTagName("interface"):
1308
# Add annotation tags
1309
for typ in ("method", "signal"):
1310
for tag in if_tag.getElementsByTagName(typ):
1312
for name, prop in (self.
1313
_get_all_dbus_things(typ)):
1314
if (name == tag.getAttribute("name")
1315
and prop._dbus_interface
1316
== if_tag.getAttribute("name")):
1317
annots.update(getattr(
1318
prop, "_dbus_annotations", {}))
1319
for name, value in annots.items():
1320
ann_tag = document.createElement(
1322
ann_tag.setAttribute("name", name)
1323
ann_tag.setAttribute("value", value)
1324
tag.appendChild(ann_tag)
1325
# Add interface annotation tags
1326
for annotation, value in dict(
1327
itertools.chain.from_iterable(
1328
annotations().items()
1329
for name, annotations
1330
in self._get_all_dbus_things("interface")
1331
if name == if_tag.getAttribute("name")
1333
ann_tag = document.createElement("annotation")
1334
ann_tag.setAttribute("name", annotation)
1335
ann_tag.setAttribute("value", value)
1336
if_tag.appendChild(ann_tag)
1337
# Fix argument name for the Introspect method itself
1338
if (if_tag.getAttribute("name")
1339
== dbus.INTROSPECTABLE_IFACE):
1340
for cn in if_tag.getElementsByTagName("method"):
1341
if cn.getAttribute("name") == "Introspect":
1342
for arg in cn.getElementsByTagName("arg"):
1343
if (arg.getAttribute("direction")
1345
arg.setAttribute("name",
1347
xmlstring = document.toxml("utf-8")
1349
except (AttributeError, xml.dom.DOMException,
1350
xml.parsers.expat.ExpatError) as error:
1351
logger.error("Failed to override Introspection method",
1356
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1357
"""A D-Bus object with properties.
1359
Classes inheriting from this can use the dbus_service_property
1360
decorator to expose methods as D-Bus properties. It exposes the
1361
standard Get(), Set(), and GetAll() methods on the D-Bus.
879
inspect.getmembers(cls,
880
self._is_dbus_thing(thing)))
1364
882
def _get_dbus_property(self, interface_name, property_name):
1365
883
"""Returns a bound method if one exists which is a D-Bus
1366
884
property with the specified name and interface.
1368
for cls in self.__class__.__mro__:
1369
for name, value in inspect.getmembers(
1370
cls, self._is_dbus_thing("property")):
886
for cls in self.__class__.__mro__:
887
for name, value in (inspect.getmembers
889
self._is_dbus_thing("property"))):
1371
890
if (value._dbus_name == property_name
1372
891
and value._dbus_interface == interface_name):
1373
892
return value.__get__(self)
1375
894
# No such property
1376
raise DBusPropertyNotFound("{}:{}.{}".format(
1377
self.dbus_object_path, interface_name, property_name))
1380
def _get_all_interface_names(cls):
1381
"""Get a sequence of all interfaces supported by an object"""
1382
return (name for name in set(getattr(getattr(x, attr),
1383
"_dbus_interface", None)
1384
for x in (inspect.getmro(cls))
1386
if name is not None)
1388
@dbus.service.method(dbus.PROPERTIES_IFACE,
895
raise DBusPropertyNotFound(self.dbus_object_path + ":"
896
+ interface_name + "."
899
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1390
900
out_signature="v")
1391
901
def Get(self, interface_name, property_name):
1392
902
"""Standard D-Bus property Get() method, see D-Bus standard.
1520
1042
return xmlstring
1524
dbus.OBJECT_MANAGER_IFACE
1525
except AttributeError:
1526
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1529
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1530
"""A D-Bus object with an ObjectManager.
1532
Classes inheriting from this exposes the standard
1533
GetManagedObjects call and the InterfacesAdded and
1534
InterfacesRemoved signals on the standard
1535
"org.freedesktop.DBus.ObjectManager" interface.
1537
Note: No signals are sent automatically; they must be sent
1540
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1541
out_signature="a{oa{sa{sv}}}")
1542
def GetManagedObjects(self):
1543
"""This function must be overridden"""
1544
raise NotImplementedError()
1546
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1547
signature="oa{sa{sv}}")
1548
def InterfacesAdded(self, object_path, interfaces_and_properties):
1551
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1552
def InterfacesRemoved(self, object_path, interfaces):
1555
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1557
path_keyword='object_path',
1558
connection_keyword='connection')
1559
def Introspect(self, object_path, connection):
1560
"""Overloading of standard D-Bus method.
1562
Override return argument name of GetManagedObjects to be
1563
"objpath_interfaces_and_properties"
1565
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1569
document = xml.dom.minidom.parseString(xmlstring)
1571
for if_tag in document.getElementsByTagName("interface"):
1572
# Fix argument name for the GetManagedObjects method
1573
if (if_tag.getAttribute("name")
1574
== dbus.OBJECT_MANAGER_IFACE):
1575
for cn in if_tag.getElementsByTagName("method"):
1576
if (cn.getAttribute("name")
1577
== "GetManagedObjects"):
1578
for arg in cn.getElementsByTagName("arg"):
1579
if (arg.getAttribute("direction")
1583
"objpath_interfaces"
1585
xmlstring = document.toxml("utf-8")
1587
except (AttributeError, xml.dom.DOMException,
1588
xml.parsers.expat.ExpatError) as error:
1589
logger.error("Failed to override Introspection method",
1594
1045
def datetime_to_dbus(dt, variant_level=0):
1595
1046
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1597
return dbus.String("", variant_level=variant_level)
1598
return dbus.String(dt.isoformat(), variant_level=variant_level)
1048
return dbus.String("", variant_level = variant_level)
1049
return dbus.String(dt.isoformat(),
1050
variant_level=variant_level)
1601
1053
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1962
1413
server to mandos-client
1966
1417
# Rejected - signal
1967
1418
@dbus.service.signal(_interface, signature="s")
1968
1419
def Rejected(self, reason):
1972
1423
# NeedApproval - signal
1973
1424
@dbus.service.signal(_interface, signature="tb")
1974
1425
def NeedApproval(self, timeout, default):
1976
1427
return self.need_approval()
1980
1431
# Approve - method
1981
1432
@dbus.service.method(_interface, in_signature="b")
1982
1433
def Approve(self, value):
1983
1434
self.approve(value)
1985
1436
# CheckedOK - method
1986
1437
@dbus.service.method(_interface)
1987
1438
def CheckedOK(self):
1988
1439
self.checked_ok()
1990
1441
# Enable - method
1991
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1992
1442
@dbus.service.method(_interface)
1993
1443
def Enable(self):
1997
1447
# StartChecker - method
1998
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1999
1448
@dbus.service.method(_interface)
2000
1449
def StartChecker(self):
2002
1451
self.start_checker()
2004
1453
# Disable - method
2005
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2006
1454
@dbus.service.method(_interface)
2007
1455
def Disable(self):
2011
1459
# StopChecker - method
2012
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2013
1460
@dbus.service.method(_interface)
2014
1461
def StopChecker(self):
2015
1462
self.stop_checker()
2019
1466
# ApprovalPending - property
2020
1467
@dbus_service_property(_interface, signature="b", access="read")
2021
1468
def ApprovalPending_dbus_property(self):
2022
1469
return dbus.Boolean(bool(self.approvals_pending))
2024
1471
# ApprovedByDefault - property
2025
@dbus_service_property(_interface,
1472
@dbus_service_property(_interface, signature="b",
2027
1473
access="readwrite")
2028
1474
def ApprovedByDefault_dbus_property(self, value=None):
2029
1475
if value is None: # get
2030
1476
return dbus.Boolean(self.approved_by_default)
2031
1477
self.approved_by_default = bool(value)
2033
1479
# ApprovalDelay - property
2034
@dbus_service_property(_interface,
1480
@dbus_service_property(_interface, signature="t",
2036
1481
access="readwrite")
2037
1482
def ApprovalDelay_dbus_property(self, value=None):
2038
1483
if value is None: # get
2039
1484
return dbus.UInt64(self.approval_delay.total_seconds()
2041
1486
self.approval_delay = datetime.timedelta(0, 0, 0, value)
2043
1488
# ApprovalDuration - property
2044
@dbus_service_property(_interface,
1489
@dbus_service_property(_interface, signature="t",
2046
1490
access="readwrite")
2047
1491
def ApprovalDuration_dbus_property(self, value=None):
2048
1492
if value is None: # get
2049
1493
return dbus.UInt64(self.approval_duration.total_seconds()
2051
1495
self.approval_duration = datetime.timedelta(0, 0, 0, value)
2053
1497
# Name - property
2055
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2056
1498
@dbus_service_property(_interface, signature="s", access="read")
2057
1499
def Name_dbus_property(self):
2058
1500
return dbus.String(self.name)
2062
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2063
@dbus_service_property(_interface, signature="s", access="read")
2064
def KeyID_dbus_property(self):
2065
return dbus.String(self.key_id)
2067
1502
# Fingerprint - property
2069
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2070
1503
@dbus_service_property(_interface, signature="s", access="read")
2071
1504
def Fingerprint_dbus_property(self):
2072
1505
return dbus.String(self.fingerprint)
2074
1507
# Host - property
2075
@dbus_service_property(_interface,
1508
@dbus_service_property(_interface, signature="s",
2077
1509
access="readwrite")
2078
1510
def Host_dbus_property(self, value=None):
2079
1511
if value is None: # get
2080
1512
return dbus.String(self.host)
2081
1513
self.host = str(value)
2083
1515
# Created - property
2085
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2086
1516
@dbus_service_property(_interface, signature="s", access="read")
2087
1517
def Created_dbus_property(self):
2088
1518
return datetime_to_dbus(self.created)
2090
1520
# LastEnabled - property
2091
1521
@dbus_service_property(_interface, signature="s", access="read")
2092
1522
def LastEnabled_dbus_property(self):
2093
1523
return datetime_to_dbus(self.last_enabled)
2095
1525
# Enabled - property
2096
@dbus_service_property(_interface,
1526
@dbus_service_property(_interface, signature="b",
2098
1527
access="readwrite")
2099
1528
def Enabled_dbus_property(self, value=None):
2100
1529
if value is None: # get
2382
1794
delay -= time2 - time
2385
session.send(client.secret)
2386
except gnutls.Error as error:
2387
logger.warning("gnutls send failed",
1797
while sent_size < len(client.secret):
1799
sent = session.send(client.secret[sent_size:])
1800
except gnutls.errors.GNUTLSError as error:
1801
logger.warning("gnutls send failed",
1804
logger.debug("Sent: %d, remaining: %d",
1805
sent, len(client.secret)
1806
- (sent_size + sent))
2391
1809
logger.info("Sending secret to %s", client.name)
2392
1810
# bump the timeout using extended_timeout
2393
1811
client.bump_timeout(client.extended_timeout)
2394
1812
if self.server.use_dbus:
2395
1813
# Emit D-Bus signal
2396
1814
client.GotSecret()
2399
1817
if approval_required:
2400
1818
client.approvals_pending -= 1
2403
except gnutls.Error as error:
1821
except gnutls.errors.GNUTLSError as error:
2404
1822
logger.warning("GnuTLS bye failed",
2405
1823
exc_info=error)
2408
1826
def peer_certificate(session):
2409
"Return the peer's certificate as a bytestring"
2411
cert_type = gnutls.certificate_type_get2(session._c_object,
2413
except AttributeError:
2414
cert_type = gnutls.certificate_type_get(session._c_object)
2415
if gnutls.has_rawpk:
2416
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2418
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2419
# If not a valid certificate type...
2420
if cert_type not in valid_cert_types:
2421
logger.info("Cert type %r not in %r", cert_type,
2423
# ...return invalid data
1827
"Return the peer's OpenPGP certificate as a bytestring"
1828
# If not an OpenPGP certificate...
1829
if (gnutls.library.functions
1830
.gnutls_certificate_type_get(session._c_object)
1831
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1832
# ...do the normal thing
1833
return session.peer_certificate
2425
1834
list_size = ctypes.c_uint(1)
2426
cert_list = (gnutls.certificate_get_peers
1835
cert_list = (gnutls.library.functions
1836
.gnutls_certificate_get_peers
2427
1837
(session._c_object, ctypes.byref(list_size)))
2428
1838
if not bool(cert_list) and list_size.value != 0:
2429
raise gnutls.Error("error getting peer certificate")
1839
raise gnutls.errors.GNUTLSError("error getting peer"
2430
1841
if list_size.value == 0:
2432
1843
cert = cert_list[0]
2433
1844
return ctypes.string_at(cert.data, cert.size)
2436
def key_id(certificate):
2437
"Convert a certificate bytestring to a hexdigit key ID"
2438
# New GnuTLS "datum" with the public key
2439
datum = gnutls.datum_t(
2440
ctypes.cast(ctypes.c_char_p(certificate),
2441
ctypes.POINTER(ctypes.c_ubyte)),
2442
ctypes.c_uint(len(certificate)))
2443
# XXX all these need to be created in the gnutls "module"
2444
# New empty GnuTLS certificate
2445
pubkey = gnutls.pubkey_t()
2446
gnutls.pubkey_init(ctypes.byref(pubkey))
2447
# Import the raw public key into the certificate
2448
gnutls.pubkey_import(pubkey,
2449
ctypes.byref(datum),
2450
gnutls.X509_FMT_DER)
2451
# New buffer for the key ID
2452
buf = ctypes.create_string_buffer(32)
2453
buf_len = ctypes.c_size_t(len(buf))
2454
# Get the key ID from the raw public key into the buffer
2455
gnutls.pubkey_get_key_id(pubkey,
2456
gnutls.KEYID_USE_SHA256,
2457
ctypes.cast(ctypes.byref(buf),
2458
ctypes.POINTER(ctypes.c_ubyte)),
2459
ctypes.byref(buf_len))
2460
# Deinit the certificate
2461
gnutls.pubkey_deinit(pubkey)
2463
# Convert the buffer to a Python bytestring
2464
key_id = ctypes.string_at(buf, buf_len.value)
2465
# Convert the bytestring to hexadecimal notation
2466
hex_key_id = binascii.hexlify(key_id).upper()
2470
1847
def fingerprint(openpgp):
2471
1848
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2472
1849
# New GnuTLS "datum" with the OpenPGP public key
2473
datum = gnutls.datum_t(
2474
ctypes.cast(ctypes.c_char_p(openpgp),
2475
ctypes.POINTER(ctypes.c_ubyte)),
2476
ctypes.c_uint(len(openpgp)))
1850
datum = (gnutls.library.types
1851
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1854
ctypes.c_uint(len(openpgp))))
2477
1855
# New empty GnuTLS certificate
2478
crt = gnutls.openpgp_crt_t()
2479
gnutls.openpgp_crt_init(ctypes.byref(crt))
1856
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1857
(gnutls.library.functions
1858
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2480
1859
# Import the OpenPGP public key into the certificate
2481
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2482
gnutls.OPENPGP_FMT_RAW)
1860
(gnutls.library.functions
1861
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1862
gnutls.library.constants
1863
.GNUTLS_OPENPGP_FMT_RAW))
2483
1864
# Verify the self signature in the key
2484
1865
crtverify = ctypes.c_uint()
2485
gnutls.openpgp_crt_verify_self(crt, 0,
2486
ctypes.byref(crtverify))
1866
(gnutls.library.functions
1867
.gnutls_openpgp_crt_verify_self(crt, 0,
1868
ctypes.byref(crtverify)))
2487
1869
if crtverify.value != 0:
2488
gnutls.openpgp_crt_deinit(crt)
2489
raise gnutls.CertificateSecurityError(code
1870
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1871
raise (gnutls.errors.CertificateSecurityError
2491
1873
# New buffer for the fingerprint
2492
1874
buf = ctypes.create_string_buffer(20)
2493
1875
buf_len = ctypes.c_size_t()
2494
1876
# Get the fingerprint from the certificate into the buffer
2495
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2496
ctypes.byref(buf_len))
1877
(gnutls.library.functions
1878
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1879
ctypes.byref(buf_len)))
2497
1880
# Deinit the certificate
2498
gnutls.openpgp_crt_deinit(crt)
1881
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2499
1882
# Convert the buffer to a Python bytestring
2500
1883
fpr = ctypes.string_at(buf, buf_len.value)
2501
1884
# Convert the bytestring to hexadecimal notation
2590
1967
# socket_wrapper(), if socketfd was set.
2591
1968
socketserver.TCPServer.__init__(self, server_address,
2592
1969
RequestHandlerClass)
2594
1971
def server_bind(self):
2595
1972
"""This overrides the normal server_bind() function
2596
1973
to bind to an interface if one was specified, and also NOT to
2597
1974
bind to an address or port if they were not specified."""
2598
global SO_BINDTODEVICE
2599
1975
if self.interface is not None:
2600
1976
if SO_BINDTODEVICE is None:
2601
# Fall back to a hard-coded value which seems to be
2603
logger.warning("SO_BINDTODEVICE not found, trying 25")
2604
SO_BINDTODEVICE = 25
2606
self.socket.setsockopt(
2607
socket.SOL_SOCKET, SO_BINDTODEVICE,
2608
(self.interface + "\0").encode("utf-8"))
2609
except socket.error as error:
2610
if error.errno == errno.EPERM:
2611
logger.error("No permission to bind to"
2612
" interface %s", self.interface)
2613
elif error.errno == errno.ENOPROTOOPT:
2614
logger.error("SO_BINDTODEVICE not available;"
2615
" cannot bind to interface %s",
2617
elif error.errno == errno.ENODEV:
2618
logger.error("Interface %s does not exist,"
2619
" cannot bind", self.interface)
1977
logger.error("SO_BINDTODEVICE does not exist;"
1978
" cannot bind to interface %s",
1982
self.socket.setsockopt(socket.SOL_SOCKET,
1984
(self.interface + "\0")
1986
except socket.error as error:
1987
if error.errno == errno.EPERM:
1988
logger.error("No permission to bind to"
1989
" interface %s", self.interface)
1990
elif error.errno == errno.ENOPROTOOPT:
1991
logger.error("SO_BINDTODEVICE not available;"
1992
" cannot bind to interface %s",
1994
elif error.errno == errno.ENODEV:
1995
logger.error("Interface %s does not exist,"
1996
" cannot bind", self.interface)
2622
1999
# Only bind(2) the socket if we really need to.
2623
2000
if self.server_address[0] or self.server_address[1]:
2624
if self.server_address[1]:
2625
self.allow_reuse_address = True
2626
2001
if not self.server_address[0]:
2627
2002
if self.address_family == socket.AF_INET6:
2628
any_address = "::" # in6addr_any
2003
any_address = "::" # in6addr_any
2630
any_address = "0.0.0.0" # INADDR_ANY
2005
any_address = "0.0.0.0" # INADDR_ANY
2631
2006
self.server_address = (any_address,
2632
2007
self.server_address[1])
2633
2008
elif not self.server_address[1]:
2634
self.server_address = (self.server_address[0], 0)
2009
self.server_address = (self.server_address[0],
2635
2011
# if self.interface:
2636
2012
# self.server_address = (self.server_address[0],
2667
2038
self.gnutls_priority = gnutls_priority
2668
2039
IPv6_TCPServer.__init__(self, server_address,
2669
2040
RequestHandlerClass,
2670
interface=interface,
2041
interface = interface,
2042
use_ipv6 = use_ipv6,
2043
socketfd = socketfd)
2674
2044
def server_activate(self):
2675
2045
if self.enabled:
2676
2046
return socketserver.TCPServer.server_activate(self)
2678
2048
def enable(self):
2679
2049
self.enabled = True
2681
2051
def add_pipe(self, parent_pipe, proc):
2682
2052
# Call "handle_ipc" for both data and EOF events
2684
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2685
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2686
functools.partial(self.handle_ipc,
2687
parent_pipe=parent_pipe,
2690
def handle_ipc(self, source, condition,
2693
client_object=None):
2053
gobject.io_add_watch(parent_pipe.fileno(),
2054
gobject.IO_IN | gobject.IO_HUP,
2055
functools.partial(self.handle_ipc,
2060
def handle_ipc(self, source, condition, parent_pipe=None,
2061
proc = None, client_object=None):
2694
2062
# error, or the other end of multiprocessing.Pipe has closed
2695
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2063
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2696
2064
# Wait for other process to exit
2700
2068
# Read a request from the child
2701
2069
request = parent_pipe.recv()
2702
2070
command = request[0]
2704
2072
if command == 'init':
2705
key_id = request[1].decode("ascii")
2706
fpr = request[2].decode("ascii")
2707
address = request[3]
2709
for c in self.clients.values():
2710
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2712
if key_id and c.key_id == key_id:
2715
if fpr and c.fingerprint == fpr:
2074
address = request[2]
2076
for c in self.clients.itervalues():
2077
if c.fingerprint == fpr:
2719
logger.info("Client not found for key ID: %s, address"
2720
": %s", key_id or fpr, address)
2081
logger.info("Client not found for fingerprint: %s, ad"
2082
"dress: %s", fpr, address)
2721
2083
if self.use_dbus:
2722
2084
# Emit D-Bus signal
2723
mandos_dbus_service.ClientNotFound(key_id or fpr,
2085
mandos_dbus_service.ClientNotFound(fpr,
2725
2087
parent_pipe.send(False)
2729
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2730
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2731
functools.partial(self.handle_ipc,
2732
parent_pipe=parent_pipe,
2734
client_object=client))
2090
gobject.io_add_watch(parent_pipe.fileno(),
2091
gobject.IO_IN | gobject.IO_HUP,
2092
functools.partial(self.handle_ipc,
2735
2098
parent_pipe.send(True)
2736
2099
# remove the old hook in favor of the new above hook on
2740
2103
funcname = request[1]
2741
2104
args = request[2]
2742
2105
kwargs = request[3]
2744
2107
parent_pipe.send(('data', getattr(client_object,
2745
2108
funcname)(*args,
2748
2111
if command == 'getattr':
2749
2112
attrname = request[1]
2750
if isinstance(client_object.__getattribute__(attrname),
2751
collections.Callable):
2752
parent_pipe.send(('function', ))
2113
if callable(client_object.__getattribute__(attrname)):
2114
parent_pipe.send(('function',))
2755
'data', client_object.__getattribute__(attrname)))
2116
parent_pipe.send(('data', client_object
2117
.__getattribute__(attrname)))
2757
2119
if command == 'setattr':
2758
2120
attrname = request[1]
2759
2121
value = request[2]
2760
2122
setattr(client_object, attrname, value)
2765
2127
def rfc3339_duration_to_delta(duration):
2766
2128
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2768
>>> rfc3339_duration_to_delta("P7D") == datetime.timedelta(7)
2770
>>> rfc3339_duration_to_delta("PT60S") == datetime.timedelta(0, 60)
2772
>>> rfc3339_duration_to_delta("PT60M") == datetime.timedelta(0, 3600)
2774
>>> rfc3339_duration_to_delta("PT24H") == datetime.timedelta(1)
2776
>>> rfc3339_duration_to_delta("P1W") == datetime.timedelta(7)
2778
>>> rfc3339_duration_to_delta("PT5M30S") == datetime.timedelta(0, 330)
2780
>>> rfc3339_duration_to_delta("P1DT3M20S") == datetime.timedelta(1, 200)
2130
>>> rfc3339_duration_to_delta("P7D")
2131
datetime.timedelta(7)
2132
>>> rfc3339_duration_to_delta("PT60S")
2133
datetime.timedelta(0, 60)
2134
>>> rfc3339_duration_to_delta("PT60M")
2135
datetime.timedelta(0, 3600)
2136
>>> rfc3339_duration_to_delta("PT24H")
2137
datetime.timedelta(1)
2138
>>> rfc3339_duration_to_delta("P1W")
2139
datetime.timedelta(7)
2140
>>> rfc3339_duration_to_delta("PT5M30S")
2141
datetime.timedelta(0, 330)
2142
>>> rfc3339_duration_to_delta("P1DT3M20S")
2143
datetime.timedelta(1, 200)
2784
2146
# Parsing an RFC 3339 duration with regular expressions is not
2785
2147
# possible - there would have to be multiple places for the same
2786
2148
# values, like seconds. The current code, while more esoteric, is
2787
2149
# cleaner without depending on a parsing library. If Python had a
2788
2150
# built-in library for parsing we would use it, but we'd like to
2789
2151
# avoid excessive use of external libraries.
2791
2153
# New type for defining tokens, syntax, and semantics all-in-one
2792
Token = collections.namedtuple("Token", (
2793
"regexp", # To match token; if "value" is not None, must have
2794
# a "group" containing digits
2795
"value", # datetime.timedelta or None
2796
"followers")) # Tokens valid after this token
2154
Token = collections.namedtuple("Token",
2155
("regexp", # To match token; if
2156
# "value" is not None,
2157
# must have a "group"
2159
"value", # datetime.timedelta or
2161
"followers")) # Tokens valid after
2797
2163
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2798
2164
# the "duration" ABNF definition in RFC 3339, Appendix A.
2799
2165
token_end = Token(re.compile(r"$"), None, frozenset())
2800
2166
token_second = Token(re.compile(r"(\d+)S"),
2801
2167
datetime.timedelta(seconds=1),
2802
frozenset((token_end, )))
2168
frozenset((token_end,)))
2803
2169
token_minute = Token(re.compile(r"(\d+)M"),
2804
2170
datetime.timedelta(minutes=1),
2805
2171
frozenset((token_second, token_end)))
3137
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3139
2501
except OSError as error:
3140
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3141
.format(uid, gid, os.strerror(error.errno)))
3142
2502
if error.errno != errno.EPERM:
3146
2506
# Enable all possible GnuTLS debugging
3148
2508
# "Use a log level over 10 to enable all debugging options."
3149
2509
# - GnuTLS manual
3150
gnutls.global_set_log_level(11)
2510
gnutls.library.functions.gnutls_global_set_log_level(11)
2512
@gnutls.library.types.gnutls_log_func
3153
2513
def debug_gnutls(level, string):
3154
2514
logger.debug("GnuTLS: %s", string[:-1])
3156
gnutls.global_set_log_function(debug_gnutls)
2516
(gnutls.library.functions
2517
.gnutls_global_set_log_function(debug_gnutls))
3158
2519
# Redirect stdin so all checkers get /dev/null
3159
2520
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
3160
2521
os.dup2(null, sys.stdin.fileno())
3164
2525
# Need to fork before connecting to D-Bus
3165
2526
if not foreground:
3166
2527
# Close all input and output, do double fork, etc.
3169
if gi.version_info < (3, 10, 2):
3170
# multiprocessing will use threads, so before we use GLib we
3171
# need to inform GLib that threads will be used.
2530
# multiprocessing will use threads, so before we use gobject we
2531
# need to inform gobject that threads will be used.
2532
gobject.threads_init()
3174
2534
global main_loop
3175
2535
# From the Avahi example code
3176
2536
DBusGMainLoop(set_as_default=True)
3177
main_loop = GLib.MainLoop()
2537
main_loop = gobject.MainLoop()
3178
2538
bus = dbus.SystemBus()
3179
2539
# End of Avahi example code
3182
2542
bus_name = dbus.service.BusName("se.recompile.Mandos",
3185
old_bus_name = dbus.service.BusName(
3186
"se.bsnet.fukt.Mandos", bus,
3188
except dbus.exceptions.DBusException as e:
2543
bus, do_not_queue=True)
2544
old_bus_name = (dbus.service.BusName
2545
("se.bsnet.fukt.Mandos", bus,
2547
except dbus.exceptions.NameExistsException as e:
3189
2548
logger.error("Disabling D-Bus:", exc_info=e)
3190
2549
use_dbus = False
3191
2550
server_settings["use_dbus"] = False
3192
2551
tcp_server.use_dbus = False
3194
2553
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3195
service = AvahiServiceToSyslog(
3196
name=server_settings["servicename"],
3197
servicetype="_mandos._tcp",
2554
service = AvahiServiceToSyslog(name =
2555
server_settings["servicename"],
2556
servicetype = "_mandos._tcp",
2557
protocol = protocol, bus = bus)
3200
2558
if server_settings["interface"]:
3201
service.interface = if_nametoindex(
3202
server_settings["interface"].encode("utf-8"))
2559
service.interface = (if_nametoindex
2560
(server_settings["interface"]
3204
2563
global multiprocessing_manager
3205
2564
multiprocessing_manager = multiprocessing.Manager()
3207
2566
client_class = Client
3209
client_class = functools.partial(ClientDBus, bus=bus)
2568
client_class = functools.partial(ClientDBus, bus = bus)
3211
2570
client_settings = Client.config_parser(client_config)
3212
2571
old_client_settings = {}
3213
2572
clients_data = {}
3215
2574
# This is used to redirect stdout and stderr for checker processes
3217
wnull = open(os.devnull, "w") # A writable /dev/null
2576
wnull = open(os.devnull, "w") # A writable /dev/null
3218
2577
# Only used if server is running in foreground but not in debug
3220
2579
if debug or not foreground:
3223
2582
# Get client data and settings from last running state.
3224
2583
if server_settings["restore"]:
3226
2585
with open(stored_state_path, "rb") as stored_state:
3227
if sys.version_info.major == 2:
3228
clients_data, old_client_settings = pickle.load(
3231
bytes_clients_data, bytes_old_client_settings = (
3232
pickle.load(stored_state, encoding="bytes"))
3233
# Fix bytes to strings
3236
clients_data = {(key.decode("utf-8")
3237
if isinstance(key, bytes)
3240
bytes_clients_data.items()}
3241
del bytes_clients_data
3242
for key in clients_data:
3243
value = {(k.decode("utf-8")
3244
if isinstance(k, bytes) else k): v
3246
clients_data[key].items()}
3247
clients_data[key] = value
3249
value["client_structure"] = [
3251
if isinstance(s, bytes)
3253
value["client_structure"]]
3254
# .name, .host, and .checker_command
3255
for k in ("name", "host", "checker_command"):
3256
if isinstance(value[k], bytes):
3257
value[k] = value[k].decode("utf-8")
3258
if "key_id" not in value:
3259
value["key_id"] = ""
3260
elif "fingerprint" not in value:
3261
value["fingerprint"] = ""
3262
# old_client_settings
3264
old_client_settings = {
3265
(key.decode("utf-8")
3266
if isinstance(key, bytes)
3269
bytes_old_client_settings.items()}
3270
del bytes_old_client_settings
3271
# .host and .checker_command
3272
for value in old_client_settings.values():
3273
for attribute in ("host", "checker_command"):
3274
if isinstance(value[attribute], bytes):
3275
value[attribute] = (value[attribute]
2586
clients_data, old_client_settings = (pickle.load
3277
2588
os.remove(stored_state_path)
3278
2589
except IOError as e:
3279
2590
if e.errno == errno.ENOENT:
3280
logger.warning("Could not load persistent state:"
3281
" {}".format(os.strerror(e.errno)))
2591
logger.warning("Could not load persistent state: {}"
2592
.format(os.strerror(e.errno)))
3283
2594
logger.critical("Could not load persistent state:",
3286
2597
except EOFError as e:
3287
2598
logger.warning("Could not load persistent state: "
2599
"EOFError:", exc_info=e)
3291
2601
with PGPEngine() as pgp:
3292
2602
for client_name, client in clients_data.items():
3293
2603
# Skip removed clients
3294
2604
if client_name not in client_settings:
3297
2607
# Decide which value to use after restoring saved state.
3298
2608
# We have three different values: Old config file,
3299
2609
# new config file, and saved state.
3357
2667
for client_name in (set(client_settings)
3358
2668
- set(old_client_settings)):
3359
2669
clients_data[client_name] = client_settings[client_name]
3361
2671
# Create all client objects
3362
2672
for client_name, client in clients_data.items():
3363
2673
tcp_server.clients[client_name] = client_class(
3366
server_settings=server_settings)
2674
name = client_name, settings = client,
2675
server_settings = server_settings)
3368
2677
if not tcp_server.clients:
3369
2678
logger.warning("No clients defined")
3371
2680
if not foreground:
3372
2681
if pidfile is not None:
3376
print(pid, file=pidfile)
2685
pidfile.write("{}\n".format(pid).encode("utf-8"))
3377
2686
except IOError:
3378
2687
logger.error("Could not write to file %r with PID %d",
3379
2688
pidfilename, pid)
3381
2690
del pidfilename
3383
for termsig in (signal.SIGHUP, signal.SIGTERM):
3384
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3385
lambda: main_loop.quit() and False)
2692
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2693
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3389
@alternate_dbus_interfaces(
3390
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3391
class MandosDBusService(DBusObjectWithObjectManager):
2696
@alternate_dbus_interfaces({"se.recompile.Mandos":
2697
"se.bsnet.fukt.Mandos"})
2698
class MandosDBusService(DBusObjectWithProperties):
3392
2699
"""A D-Bus proxy object"""
3394
2700
def __init__(self):
3395
2701
dbus.service.Object.__init__(self, bus, "/")
3397
2702
_interface = "se.recompile.Mandos"
2704
@dbus_interface_annotations(_interface)
2706
return { "org.freedesktop.DBus.Property"
2707
".EmitsChangedSignal":
3399
2710
@dbus.service.signal(_interface, signature="o")
3400
2711
def ClientAdded(self, objpath):
3404
2715
@dbus.service.signal(_interface, signature="ss")
3405
def ClientNotFound(self, key_id, address):
2716
def ClientNotFound(self, fingerprint, address):
3409
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3411
2720
@dbus.service.signal(_interface, signature="os")
3412
2721
def ClientRemoved(self, objpath, name):
3416
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3418
2725
@dbus.service.method(_interface, out_signature="ao")
3419
2726
def GetAllClients(self):
3421
return dbus.Array(c.dbus_object_path for c in
3422
tcp_server.clients.values())
3424
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2728
return dbus.Array(c.dbus_object_path
2730
tcp_server.clients.itervalues())
3426
2732
@dbus.service.method(_interface,
3427
2733
out_signature="a{oa{sv}}")
3428
2734
def GetAllClientsWithProperties(self):
3430
2736
return dbus.Dictionary(
3431
{c.dbus_object_path: c.GetAll(
3432
"se.recompile.Mandos.Client")
3433
for c in tcp_server.clients.values()},
2737
{ c.dbus_object_path: c.GetAll("")
2738
for c in tcp_server.clients.itervalues() },
3434
2739
signature="oa{sv}")
3436
2741
@dbus.service.method(_interface, in_signature="o")
3437
2742
def RemoveClient(self, object_path):
3439
for c in tcp_server.clients.values():
2744
for c in tcp_server.clients.itervalues():
3440
2745
if c.dbus_object_path == object_path:
3441
2746
del tcp_server.clients[c.name]
3442
2747
c.remove_from_connection()
3443
# Don't signal the disabling
2748
# Don't signal anything except ClientRemoved
3444
2749
c.disable(quiet=True)
3445
# Emit D-Bus signal for removal
3446
self.client_removed_signal(c)
2751
self.ClientRemoved(object_path, c.name)
3448
2753
raise KeyError(object_path)
3452
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3453
out_signature="a{oa{sa{sv}}}")
3454
def GetManagedObjects(self):
3456
return dbus.Dictionary(
3457
{client.dbus_object_path:
3459
{interface: client.GetAll(interface)
3461
client._get_all_interface_names()})
3462
for client in tcp_server.clients.values()})
3464
def client_added_signal(self, client):
3465
"""Send the new standard signal and the old signal"""
3467
# New standard signal
3468
self.InterfacesAdded(
3469
client.dbus_object_path,
3471
{interface: client.GetAll(interface)
3473
client._get_all_interface_names()}))
3475
self.ClientAdded(client.dbus_object_path)
3477
def client_removed_signal(self, client):
3478
"""Send the new standard signal and the old signal"""
3480
# New standard signal
3481
self.InterfacesRemoved(
3482
client.dbus_object_path,
3483
client._get_all_interface_names())
3485
self.ClientRemoved(client.dbus_object_path,
3488
2757
mandos_dbus_service = MandosDBusService()
3490
# Save modules to variables to exempt the modules from being
3491
# unloaded before the function registered with atexit() is run.
3492
mp = multiprocessing
3496
2760
"Cleanup function; run on exit"
3498
2762
service.cleanup()
3500
mp.active_children()
2764
multiprocessing.active_children()
3502
2766
if not (tcp_server.clients or client_settings):
3505
2769
# Store client before exiting. Secrets are encrypted with key
3506
2770
# based on what config file has. If config file is
3507
2771
# removed/edited, old secret will thus be unrecovable.
3509
2773
with PGPEngine() as pgp:
3510
for client in tcp_server.clients.values():
2774
for client in tcp_server.clients.itervalues():
3511
2775
key = client_settings[client.name]["secret"]
3512
2776
client.encrypted_secret = pgp.encrypt(client.secret,
3514
2778
client_dict = {}
3516
2780
# A list of attributes that can not be pickled
3518
exclude = {"bus", "changedstate", "secret",
3519
"checker", "server_settings"}
3520
for name, typ in inspect.getmembers(dbus.service
2782
exclude = { "bus", "changedstate", "secret",
2783
"checker", "server_settings" }
2784
for name, typ in (inspect.getmembers
2785
(dbus.service.Object)):
3522
2786
exclude.add(name)
3524
2788
client_dict["encrypted_secret"] = (client
3525
2789
.encrypted_secret)
3526
2790
for attr in client.client_structure:
3527
2791
if attr not in exclude:
3528
2792
client_dict[attr] = getattr(client, attr)
3530
2794
clients[client.name] = client_dict
3531
2795
del client_settings[client.name]["secret"]
3534
with tempfile.NamedTemporaryFile(
3538
dir=os.path.dirname(stored_state_path),
3539
delete=False) as stored_state:
3540
pickle.dump((clients, client_settings), stored_state,
3542
tempname = stored_state.name
2798
with (tempfile.NamedTemporaryFile
2799
(mode='wb', suffix=".pickle", prefix='clients-',
2800
dir=os.path.dirname(stored_state_path),
2801
delete=False)) as stored_state:
2802
pickle.dump((clients, client_settings), stored_state)
2803
tempname=stored_state.name
3543
2804
os.rename(tempname, stored_state_path)
3544
2805
except (IOError, OSError) as e: