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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
15
# 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
21
19
# the Free Software Foundation, either version 3 of the License, or
22
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,
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>.
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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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.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
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205
def decrypt(self, data, password):
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206
passphrase = self.password_encode(password)
274
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
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"""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"))
306
for s in t), signature="ay")
307
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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class AvahiServiceToSyslog(AvahiService):
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def rename(self, *args, **kwargs):
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"""Add the new name to the syslog messages"""
512
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)
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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
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"""This isn't so much a class as it is a module-like namespace."""
523
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.
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E_NO_CERTIFICATE_FOUND = -49
546
KEYID_USE_SHA256 = 1 # gnutls/x509.h
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OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
550
class session_int(ctypes.Structure):
552
session_t = ctypes.POINTER(session_int)
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class certificate_credentials_st(ctypes.Structure):
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certificate_credentials_t = ctypes.POINTER(
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certificate_credentials_st)
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certificate_type_t = ctypes.c_int
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class datum_t(ctypes.Structure):
561
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
562
('size', ctypes.c_uint)]
564
class openpgp_crt_int(ctypes.Structure):
566
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
567
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
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transport_ptr_t = ctypes.c_void_p
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close_request_t = ctypes.c_int
574
class Error(Exception):
575
def __init__(self, message=None, code=None, args=()):
576
# Default usage is by a message string, but if a return
577
# code is passed, convert it to a string with
580
if message is None and code is not None:
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message = gnutls.strerror(code)
582
return super(gnutls.Error, self).__init__(
585
class CertificateSecurityError(Error):
591
self._c_object = gnutls.certificate_credentials_t()
592
gnutls.certificate_allocate_credentials(
593
ctypes.byref(self._c_object))
594
self.type = gnutls.CRD_CERTIFICATE
597
gnutls.certificate_free_credentials(self._c_object)
600
def __init__(self, socket, credentials=None):
601
self._c_object = gnutls.session_t()
602
gnutls_flags = gnutls.CLIENT
603
if gnutls.check_version(b"3.5.6"):
604
gnutls_flags |= gnutls.NO_TICKETS
606
gnutls_flags |= gnutls.ENABLE_RAWPK
607
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
609
gnutls.set_default_priority(self._c_object)
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gnutls.transport_set_ptr(self._c_object, socket.fileno())
611
gnutls.handshake_set_private_extensions(self._c_object,
614
if credentials is None:
615
credentials = gnutls.Credentials()
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gnutls.credentials_set(self._c_object, credentials.type,
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ctypes.cast(credentials._c_object,
619
self.credentials = credentials
622
gnutls.deinit(self._c_object)
625
return gnutls.handshake(self._c_object)
627
def send(self, data):
631
data_len -= gnutls.record_send(self._c_object,
636
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
638
# Error handling functions
639
def _error_code(result):
640
"""A function to raise exceptions on errors, suitable
641
for the 'restype' attribute on ctypes functions"""
644
if result == gnutls.E_NO_CERTIFICATE_FOUND:
645
raise gnutls.CertificateSecurityError(code=result)
646
raise gnutls.Error(code=result)
648
def _retry_on_error(result, func, arguments):
649
"""A function to retry on some errors, suitable
650
for the 'errcheck' attribute on ctypes functions"""
652
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
653
return _error_code(result)
654
result = func(*arguments)
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# Unless otherwise indicated, the function declarations below are
658
# all from the gnutls/gnutls.h C header file.
661
priority_set_direct = _library.gnutls_priority_set_direct
662
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
663
ctypes.POINTER(ctypes.c_char_p)]
664
priority_set_direct.restype = _error_code
666
init = _library.gnutls_init
667
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
668
init.restype = _error_code
670
set_default_priority = _library.gnutls_set_default_priority
671
set_default_priority.argtypes = [session_t]
672
set_default_priority.restype = _error_code
674
record_send = _library.gnutls_record_send
675
record_send.argtypes = [session_t, ctypes.c_void_p,
677
record_send.restype = ctypes.c_ssize_t
678
record_send.errcheck = _retry_on_error
680
certificate_allocate_credentials = (
681
_library.gnutls_certificate_allocate_credentials)
682
certificate_allocate_credentials.argtypes = [
683
ctypes.POINTER(certificate_credentials_t)]
684
certificate_allocate_credentials.restype = _error_code
686
certificate_free_credentials = (
687
_library.gnutls_certificate_free_credentials)
688
certificate_free_credentials.argtypes = [
689
certificate_credentials_t]
690
certificate_free_credentials.restype = None
692
handshake_set_private_extensions = (
693
_library.gnutls_handshake_set_private_extensions)
694
handshake_set_private_extensions.argtypes = [session_t,
696
handshake_set_private_extensions.restype = None
698
credentials_set = _library.gnutls_credentials_set
699
credentials_set.argtypes = [session_t, credentials_type_t,
701
credentials_set.restype = _error_code
703
strerror = _library.gnutls_strerror
704
strerror.argtypes = [ctypes.c_int]
705
strerror.restype = ctypes.c_char_p
707
certificate_type_get = _library.gnutls_certificate_type_get
708
certificate_type_get.argtypes = [session_t]
709
certificate_type_get.restype = _error_code
711
certificate_get_peers = _library.gnutls_certificate_get_peers
712
certificate_get_peers.argtypes = [session_t,
713
ctypes.POINTER(ctypes.c_uint)]
714
certificate_get_peers.restype = ctypes.POINTER(datum_t)
716
global_set_log_level = _library.gnutls_global_set_log_level
717
global_set_log_level.argtypes = [ctypes.c_int]
718
global_set_log_level.restype = None
720
global_set_log_function = _library.gnutls_global_set_log_function
721
global_set_log_function.argtypes = [log_func]
722
global_set_log_function.restype = None
724
deinit = _library.gnutls_deinit
725
deinit.argtypes = [session_t]
726
deinit.restype = None
728
handshake = _library.gnutls_handshake
729
handshake.argtypes = [session_t]
730
handshake.restype = _error_code
731
handshake.errcheck = _retry_on_error
733
transport_set_ptr = _library.gnutls_transport_set_ptr
734
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
735
transport_set_ptr.restype = None
737
bye = _library.gnutls_bye
738
bye.argtypes = [session_t, close_request_t]
739
bye.restype = _error_code
740
bye.errcheck = _retry_on_error
742
check_version = _library.gnutls_check_version
743
check_version.argtypes = [ctypes.c_char_p]
744
check_version.restype = ctypes.c_char_p
746
_need_version = b"3.3.0"
747
if check_version(_need_version) is None:
748
raise self.Error("Needs GnuTLS {} or later"
749
.format(_need_version))
751
_tls_rawpk_version = b"3.6.6"
752
has_rawpk = bool(check_version(_tls_rawpk_version))
756
class pubkey_st(ctypes.Structure):
758
pubkey_t = ctypes.POINTER(pubkey_st)
760
x509_crt_fmt_t = ctypes.c_int
762
# All the function declarations below are from gnutls/abstract.h
763
pubkey_init = _library.gnutls_pubkey_init
764
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
765
pubkey_init.restype = _error_code
767
pubkey_import = _library.gnutls_pubkey_import
768
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
770
pubkey_import.restype = _error_code
772
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
773
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
774
ctypes.POINTER(ctypes.c_ubyte),
775
ctypes.POINTER(ctypes.c_size_t)]
776
pubkey_get_key_id.restype = _error_code
778
pubkey_deinit = _library.gnutls_pubkey_deinit
779
pubkey_deinit.argtypes = [pubkey_t]
780
pubkey_deinit.restype = None
782
# All the function declarations below are from gnutls/openpgp.h
784
openpgp_crt_init = _library.gnutls_openpgp_crt_init
785
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
786
openpgp_crt_init.restype = _error_code
788
openpgp_crt_import = _library.gnutls_openpgp_crt_import
789
openpgp_crt_import.argtypes = [openpgp_crt_t,
790
ctypes.POINTER(datum_t),
792
openpgp_crt_import.restype = _error_code
794
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
795
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
796
ctypes.POINTER(ctypes.c_uint)]
797
openpgp_crt_verify_self.restype = _error_code
799
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
800
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
801
openpgp_crt_deinit.restype = None
803
openpgp_crt_get_fingerprint = (
804
_library.gnutls_openpgp_crt_get_fingerprint)
805
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
809
openpgp_crt_get_fingerprint.restype = _error_code
811
if check_version(b"3.6.4"):
812
certificate_type_get2 = _library.gnutls_certificate_type_get2
813
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
814
certificate_type_get2.restype = _error_code
816
# Remove non-public functions
817
del _error_code, _retry_on_error
820
def call_pipe(connection, # : multiprocessing.Connection
821
func, *args, **kwargs):
822
"""This function is meant to be called by multiprocessing.Process
824
This function runs func(*args, **kwargs), and writes the resulting
825
return value on the provided multiprocessing.Connection.
827
connection.send(func(*args, **kwargs))
404
class Client(object):
832
405
"""A representation of a client host served by this server.
835
408
approved: bool(); 'None' if not yet approved/disapproved
836
409
approval_delay: datetime.timedelta(); Time to wait for approval
837
410
approval_duration: datetime.timedelta(); Duration of one approval
838
checker: multiprocessing.Process(); a running checker process used
839
to see if the client lives. 'None' if no process is
841
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
842
415
checker_command: string; External command which is run to check
843
416
if client lives. %() expansions are done at
844
417
runtime with vars(self) as dict, so that for
845
418
instance %(name)s can be used in the command.
846
checker_initiator_tag: a GLib event source tag, or None
419
checker_initiator_tag: a gobject event source tag, or None
847
420
created: datetime.datetime(); (UTC) object creation
848
421
client_structure: Object describing what attributes a client has
849
422
and is used for storing the client at exit
850
423
current_checker_command: string; current running checker_command
851
disable_initiator_tag: a GLib event source tag, or None
424
disable_initiator_tag: a gobject event source tag, or None
853
426
fingerprint: string (40 or 32 hexadecimal digits); used to
854
uniquely identify an OpenPGP client
855
key_id: string (64 hexadecimal digits); used to uniquely identify
856
a client using raw public keys
427
uniquely identify the client
857
428
host: string; available for use by the checker command
858
429
interval: datetime.timedelta(); How often to start a new checker
859
430
last_approval_request: datetime.datetime(); (UTC) or None
1016
582
logger.info("Disabling client %s", self.name)
1017
583
if getattr(self, "disable_initiator_tag", None) is not None:
1018
GLib.source_remove(self.disable_initiator_tag)
584
gobject.source_remove(self.disable_initiator_tag)
1019
585
self.disable_initiator_tag = None
1020
586
self.expires = None
1021
587
if getattr(self, "checker_initiator_tag", None) is not None:
1022
GLib.source_remove(self.checker_initiator_tag)
588
gobject.source_remove(self.checker_initiator_tag)
1023
589
self.checker_initiator_tag = None
1024
590
self.stop_checker()
1025
591
self.enabled = False
1027
593
self.send_changedstate()
1028
# 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
1031
597
def __del__(self):
1034
600
def init_checker(self):
1035
601
# Schedule a new checker to be started an 'interval' from now,
1036
602
# and every interval from then on.
1037
603
if self.checker_initiator_tag is not None:
1038
GLib.source_remove(self.checker_initiator_tag)
1039
self.checker_initiator_tag = GLib.timeout_add(
1040
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),
1042
609
# Schedule a disable() when 'timeout' has passed
1043
610
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)
611
gobject.source_remove(self.disable_initiator_tag)
612
self.disable_initiator_tag = (gobject.timeout_add
614
.total_seconds() * 1000),
1047
616
# Also start a new checker *right now*.
1048
617
self.start_checker()
1050
def checker_callback(self, source, condition, connection,
619
def checker_callback(self, pid, condition, command):
1052
620
"""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
621
self.checker_callback_tag = None
1059
622
self.checker = None
1062
self.last_checker_status = returncode
1063
self.last_checker_signal = None
623
if os.WIFEXITED(condition):
624
self.last_checker_status = os.WEXITSTATUS(condition)
1064
625
if self.last_checker_status == 0:
1065
626
logger.info("Checker for %(name)s succeeded",
1067
628
self.checked_ok()
1069
logger.info("Checker for %(name)s failed", vars(self))
630
logger.info("Checker for %(name)s failed",
1071
633
self.last_checker_status = -1
1072
self.last_checker_signal = -returncode
1073
634
logger.warning("Checker for %(name)s crashed?",
1077
637
def checked_ok(self):
1078
638
"""Assert that the client has been seen, alive and well."""
1079
639
self.last_checked_ok = datetime.datetime.utcnow()
1080
640
self.last_checker_status = 0
1081
self.last_checker_signal = None
1082
641
self.bump_timeout()
1084
643
def bump_timeout(self, timeout=None):
1085
644
"""Bump up the timeout for this client."""
1086
645
if timeout is None:
1087
646
timeout = self.timeout
1088
647
if self.disable_initiator_tag is not None:
1089
GLib.source_remove(self.disable_initiator_tag)
648
gobject.source_remove(self.disable_initiator_tag)
1090
649
self.disable_initiator_tag = None
1091
650
if getattr(self, "enabled", False):
1092
self.disable_initiator_tag = GLib.timeout_add(
1093
int(timeout.total_seconds() * 1000), self.disable)
651
self.disable_initiator_tag = (gobject.timeout_add
652
(int(timeout.total_seconds()
653
* 1000), self.disable))
1094
654
self.expires = datetime.datetime.utcnow() + timeout
1096
656
def need_approval(self):
1097
657
self.last_approval_request = datetime.datetime.utcnow()
1099
659
def start_checker(self):
1100
660
"""Start a new checker subprocess if one is not running.
1102
662
If a checker already exists, leave it running and do
1104
664
# The reason for not killing a running checker is that if we
1109
669
# checkers alone, the checker would have to take more time
1110
670
# 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")
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)
1117
687
# Start a new checker if needed
1118
688
if self.checker is None:
1119
689
# Escape attributes for the shell
1121
attr: re.escape(str(getattr(self, attr)))
1122
for attr in self.runtime_expansions}
690
escaped_attrs = { attr:
691
re.escape(str(getattr(self, attr)))
692
for attr in self.runtime_expansions }
1124
694
command = self.checker_command % escaped_attrs
1125
695
except TypeError as error:
1126
696
logger.error('Could not format string "%s"',
1127
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",
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
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
1160
744
def stop_checker(self):
1161
745
"""Force the checker process, if any, to stop."""
1162
746
if self.checker_callback_tag:
1163
GLib.source_remove(self.checker_callback_tag)
747
gobject.source_remove(self.checker_callback_tag)
1164
748
self.checker_callback_tag = None
1165
749
if getattr(self, "checker", None) is None:
1167
751
logger.debug("Stopping checker for %(name)s", vars(self))
1168
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
1169
760
self.checker = None
1172
def dbus_service_property(dbus_interface,
763
def dbus_service_property(dbus_interface, signature="v",
764
access="readwrite", byte_arrays=False):
1176
765
"""Decorators for marking methods of a DBusObjectWithProperties to
1177
766
become properties on the D-Bus.
1179
768
The decorated method will be called with no arguments by "Get"
1180
769
and with one argument by "Set".
1182
771
The parameters, where they are supported, are the same as
1183
772
dbus.service.method, except there is only "signature", since the
1184
773
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.
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.
1275
856
def _is_dbus_thing(thing):
1276
857
"""Returns a function testing if an attribute is a D-Bus thing
1278
859
If called like _is_dbus_thing("method") it returns a function
1279
860
suitable for use as predicate to inspect.getmembers().
1281
862
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1284
865
def _get_all_dbus_things(self, thing):
1285
866
"""Returns a generator of (name, attribute) pairs
1287
return ((getattr(athing.__get__(self), "_dbus_name", name),
868
return ((getattr(athing.__get__(self), "_dbus_name",
1288
870
athing.__get__(self))
1289
871
for cls in self.__class__.__mro__
1290
872
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.
873
inspect.getmembers(cls,
874
self._is_dbus_thing(thing)))
1364
876
def _get_dbus_property(self, interface_name, property_name):
1365
877
"""Returns a bound method if one exists which is a D-Bus
1366
878
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")):
880
for cls in self.__class__.__mro__:
881
for name, value in (inspect.getmembers
883
self._is_dbus_thing("property"))):
1371
884
if (value._dbus_name == property_name
1372
885
and value._dbus_interface == interface_name):
1373
886
return value.__get__(self)
1375
888
# 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,
889
raise DBusPropertyNotFound(self.dbus_object_path + ":"
890
+ interface_name + "."
893
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1390
894
out_signature="v")
1391
895
def Get(self, interface_name, property_name):
1392
896
"""Standard D-Bus property Get() method, see D-Bus standard.
1521
1036
return xmlstring
1525
dbus.OBJECT_MANAGER_IFACE
1526
except AttributeError:
1527
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1530
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1531
"""A D-Bus object with an ObjectManager.
1533
Classes inheriting from this exposes the standard
1534
GetManagedObjects call and the InterfacesAdded and
1535
InterfacesRemoved signals on the standard
1536
"org.freedesktop.DBus.ObjectManager" interface.
1538
Note: No signals are sent automatically; they must be sent
1541
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1542
out_signature="a{oa{sa{sv}}}")
1543
def GetManagedObjects(self):
1544
"""This function must be overridden"""
1545
raise NotImplementedError()
1547
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1548
signature="oa{sa{sv}}")
1549
def InterfacesAdded(self, object_path, interfaces_and_properties):
1552
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1553
def InterfacesRemoved(self, object_path, interfaces):
1556
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1558
path_keyword='object_path',
1559
connection_keyword='connection')
1560
def Introspect(self, object_path, connection):
1561
"""Overloading of standard D-Bus method.
1563
Override return argument name of GetManagedObjects to be
1564
"objpath_interfaces_and_properties"
1566
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1570
document = xml.dom.minidom.parseString(xmlstring)
1572
for if_tag in document.getElementsByTagName("interface"):
1573
# Fix argument name for the GetManagedObjects method
1574
if (if_tag.getAttribute("name")
1575
== dbus.OBJECT_MANAGER_IFACE):
1576
for cn in if_tag.getElementsByTagName("method"):
1577
if (cn.getAttribute("name")
1578
== "GetManagedObjects"):
1579
for arg in cn.getElementsByTagName("arg"):
1580
if (arg.getAttribute("direction")
1584
"objpath_interfaces"
1586
xmlstring = document.toxml("utf-8")
1588
except (AttributeError, xml.dom.DOMException,
1589
xml.parsers.expat.ExpatError) as error:
1590
logger.error("Failed to override Introspection method",
1595
1039
def datetime_to_dbus(dt, variant_level=0):
1596
1040
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1598
return dbus.String("", variant_level=variant_level)
1599
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)
1602
1047
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1963
1407
server to mandos-client
1967
1411
# Rejected - signal
1968
1412
@dbus.service.signal(_interface, signature="s")
1969
1413
def Rejected(self, reason):
1973
1417
# NeedApproval - signal
1974
1418
@dbus.service.signal(_interface, signature="tb")
1975
1419
def NeedApproval(self, timeout, default):
1977
1421
return self.need_approval()
1981
1425
# Approve - method
1982
1426
@dbus.service.method(_interface, in_signature="b")
1983
1427
def Approve(self, value):
1984
1428
self.approve(value)
1986
1430
# CheckedOK - method
1987
1431
@dbus.service.method(_interface)
1988
1432
def CheckedOK(self):
1989
1433
self.checked_ok()
1991
1435
# Enable - method
1992
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1993
1436
@dbus.service.method(_interface)
1994
1437
def Enable(self):
1998
1441
# StartChecker - method
1999
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2000
1442
@dbus.service.method(_interface)
2001
1443
def StartChecker(self):
2003
1445
self.start_checker()
2005
1447
# Disable - method
2006
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2007
1448
@dbus.service.method(_interface)
2008
1449
def Disable(self):
2012
1453
# StopChecker - method
2013
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2014
1454
@dbus.service.method(_interface)
2015
1455
def StopChecker(self):
2016
1456
self.stop_checker()
2020
1460
# ApprovalPending - property
2021
1461
@dbus_service_property(_interface, signature="b", access="read")
2022
1462
def ApprovalPending_dbus_property(self):
2023
1463
return dbus.Boolean(bool(self.approvals_pending))
2025
1465
# ApprovedByDefault - property
2026
@dbus_service_property(_interface,
1466
@dbus_service_property(_interface, signature="b",
2028
1467
access="readwrite")
2029
1468
def ApprovedByDefault_dbus_property(self, value=None):
2030
1469
if value is None: # get
2031
1470
return dbus.Boolean(self.approved_by_default)
2032
1471
self.approved_by_default = bool(value)
2034
1473
# ApprovalDelay - property
2035
@dbus_service_property(_interface,
1474
@dbus_service_property(_interface, signature="t",
2037
1475
access="readwrite")
2038
1476
def ApprovalDelay_dbus_property(self, value=None):
2039
1477
if value is None: # get
2040
1478
return dbus.UInt64(self.approval_delay.total_seconds()
2042
1480
self.approval_delay = datetime.timedelta(0, 0, 0, value)
2044
1482
# ApprovalDuration - property
2045
@dbus_service_property(_interface,
1483
@dbus_service_property(_interface, signature="t",
2047
1484
access="readwrite")
2048
1485
def ApprovalDuration_dbus_property(self, value=None):
2049
1486
if value is None: # get
2050
1487
return dbus.UInt64(self.approval_duration.total_seconds()
2052
1489
self.approval_duration = datetime.timedelta(0, 0, 0, value)
2054
1491
# Name - property
2056
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2057
1492
@dbus_service_property(_interface, signature="s", access="read")
2058
1493
def Name_dbus_property(self):
2059
1494
return dbus.String(self.name)
2063
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2064
@dbus_service_property(_interface, signature="s", access="read")
2065
def KeyID_dbus_property(self):
2066
return dbus.String(self.key_id)
2068
1496
# Fingerprint - property
2070
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2071
1497
@dbus_service_property(_interface, signature="s", access="read")
2072
1498
def Fingerprint_dbus_property(self):
2073
1499
return dbus.String(self.fingerprint)
2075
1501
# Host - property
2076
@dbus_service_property(_interface,
1502
@dbus_service_property(_interface, signature="s",
2078
1503
access="readwrite")
2079
1504
def Host_dbus_property(self, value=None):
2080
1505
if value is None: # get
2081
1506
return dbus.String(self.host)
2082
1507
self.host = str(value)
2084
1509
# Created - property
2086
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2087
1510
@dbus_service_property(_interface, signature="s", access="read")
2088
1511
def Created_dbus_property(self):
2089
1512
return datetime_to_dbus(self.created)
2091
1514
# LastEnabled - property
2092
1515
@dbus_service_property(_interface, signature="s", access="read")
2093
1516
def LastEnabled_dbus_property(self):
2094
1517
return datetime_to_dbus(self.last_enabled)
2096
1519
# Enabled - property
2097
@dbus_service_property(_interface,
1520
@dbus_service_property(_interface, signature="b",
2099
1521
access="readwrite")
2100
1522
def Enabled_dbus_property(self, value=None):
2101
1523
if value is None: # get
2383
1788
delay -= time2 - time
2386
session.send(client.secret)
2387
except gnutls.Error as error:
2388
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))
2392
1803
logger.info("Sending secret to %s", client.name)
2393
1804
# bump the timeout using extended_timeout
2394
1805
client.bump_timeout(client.extended_timeout)
2395
1806
if self.server.use_dbus:
2396
1807
# Emit D-Bus signal
2397
1808
client.GotSecret()
2400
1811
if approval_required:
2401
1812
client.approvals_pending -= 1
2404
except gnutls.Error as error:
1815
except gnutls.errors.GNUTLSError as error:
2405
1816
logger.warning("GnuTLS bye failed",
2406
1817
exc_info=error)
2409
1820
def peer_certificate(session):
2410
"Return the peer's certificate as a bytestring"
2412
cert_type = gnutls.certificate_type_get2(session._c_object,
2414
except AttributeError:
2415
cert_type = gnutls.certificate_type_get(session._c_object)
2416
if gnutls.has_rawpk:
2417
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2419
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2420
# If not a valid certificate type...
2421
if cert_type not in valid_cert_types:
2422
logger.info("Cert type %r not in %r", cert_type,
2424
# ...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
2426
1828
list_size = ctypes.c_uint(1)
2427
cert_list = (gnutls.certificate_get_peers
1829
cert_list = (gnutls.library.functions
1830
.gnutls_certificate_get_peers
2428
1831
(session._c_object, ctypes.byref(list_size)))
2429
1832
if not bool(cert_list) and list_size.value != 0:
2430
raise gnutls.Error("error getting peer certificate")
1833
raise gnutls.errors.GNUTLSError("error getting peer"
2431
1835
if list_size.value == 0:
2433
1837
cert = cert_list[0]
2434
1838
return ctypes.string_at(cert.data, cert.size)
2437
def key_id(certificate):
2438
"Convert a certificate bytestring to a hexdigit key ID"
2439
# New GnuTLS "datum" with the public key
2440
datum = gnutls.datum_t(
2441
ctypes.cast(ctypes.c_char_p(certificate),
2442
ctypes.POINTER(ctypes.c_ubyte)),
2443
ctypes.c_uint(len(certificate)))
2444
# XXX all these need to be created in the gnutls "module"
2445
# New empty GnuTLS certificate
2446
pubkey = gnutls.pubkey_t()
2447
gnutls.pubkey_init(ctypes.byref(pubkey))
2448
# Import the raw public key into the certificate
2449
gnutls.pubkey_import(pubkey,
2450
ctypes.byref(datum),
2451
gnutls.X509_FMT_DER)
2452
# New buffer for the key ID
2453
buf = ctypes.create_string_buffer(32)
2454
buf_len = ctypes.c_size_t(len(buf))
2455
# Get the key ID from the raw public key into the buffer
2456
gnutls.pubkey_get_key_id(pubkey,
2457
gnutls.KEYID_USE_SHA256,
2458
ctypes.cast(ctypes.byref(buf),
2459
ctypes.POINTER(ctypes.c_ubyte)),
2460
ctypes.byref(buf_len))
2461
# Deinit the certificate
2462
gnutls.pubkey_deinit(pubkey)
2464
# Convert the buffer to a Python bytestring
2465
key_id = ctypes.string_at(buf, buf_len.value)
2466
# Convert the bytestring to hexadecimal notation
2467
hex_key_id = binascii.hexlify(key_id).upper()
2471
1841
def fingerprint(openpgp):
2472
1842
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2473
1843
# New GnuTLS "datum" with the OpenPGP public key
2474
datum = gnutls.datum_t(
2475
ctypes.cast(ctypes.c_char_p(openpgp),
2476
ctypes.POINTER(ctypes.c_ubyte)),
2477
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))))
2478
1849
# New empty GnuTLS certificate
2479
crt = gnutls.openpgp_crt_t()
2480
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)))
2481
1853
# Import the OpenPGP public key into the certificate
2482
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2483
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))
2484
1858
# Verify the self signature in the key
2485
1859
crtverify = ctypes.c_uint()
2486
gnutls.openpgp_crt_verify_self(crt, 0,
2487
ctypes.byref(crtverify))
1860
(gnutls.library.functions
1861
.gnutls_openpgp_crt_verify_self(crt, 0,
1862
ctypes.byref(crtverify)))
2488
1863
if crtverify.value != 0:
2489
gnutls.openpgp_crt_deinit(crt)
2490
raise gnutls.CertificateSecurityError(code
1864
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1865
raise (gnutls.errors.CertificateSecurityError
2492
1867
# New buffer for the fingerprint
2493
1868
buf = ctypes.create_string_buffer(20)
2494
1869
buf_len = ctypes.c_size_t()
2495
1870
# Get the fingerprint from the certificate into the buffer
2496
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2497
ctypes.byref(buf_len))
1871
(gnutls.library.functions
1872
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1873
ctypes.byref(buf_len)))
2498
1874
# Deinit the certificate
2499
gnutls.openpgp_crt_deinit(crt)
1875
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2500
1876
# Convert the buffer to a Python bytestring
2501
1877
fpr = ctypes.string_at(buf, buf_len.value)
2502
1878
# Convert the bytestring to hexadecimal notation
2591
1961
# socket_wrapper(), if socketfd was set.
2592
1962
socketserver.TCPServer.__init__(self, server_address,
2593
1963
RequestHandlerClass)
2595
1965
def server_bind(self):
2596
1966
"""This overrides the normal server_bind() function
2597
1967
to bind to an interface if one was specified, and also NOT to
2598
1968
bind to an address or port if they were not specified."""
2599
global SO_BINDTODEVICE
2600
1969
if self.interface is not None:
2601
1970
if SO_BINDTODEVICE is None:
2602
# Fall back to a hard-coded value which seems to be
2604
logger.warning("SO_BINDTODEVICE not found, trying 25")
2605
SO_BINDTODEVICE = 25
2607
self.socket.setsockopt(
2608
socket.SOL_SOCKET, SO_BINDTODEVICE,
2609
(self.interface + "\0").encode("utf-8"))
2610
except socket.error as error:
2611
if error.errno == errno.EPERM:
2612
logger.error("No permission to bind to"
2613
" interface %s", self.interface)
2614
elif error.errno == errno.ENOPROTOOPT:
2615
logger.error("SO_BINDTODEVICE not available;"
2616
" cannot bind to interface %s",
2618
elif error.errno == errno.ENODEV:
2619
logger.error("Interface %s does not exist,"
2620
" 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)
2623
1993
# Only bind(2) the socket if we really need to.
2624
1994
if self.server_address[0] or self.server_address[1]:
2625
if self.server_address[1]:
2626
self.allow_reuse_address = True
2627
1995
if not self.server_address[0]:
2628
1996
if self.address_family == socket.AF_INET6:
2629
any_address = "::" # in6addr_any
1997
any_address = "::" # in6addr_any
2631
any_address = "0.0.0.0" # INADDR_ANY
1999
any_address = "0.0.0.0" # INADDR_ANY
2632
2000
self.server_address = (any_address,
2633
2001
self.server_address[1])
2634
2002
elif not self.server_address[1]:
2635
self.server_address = (self.server_address[0], 0)
2003
self.server_address = (self.server_address[0],
2636
2005
# if self.interface:
2637
2006
# self.server_address = (self.server_address[0],
2668
2032
self.gnutls_priority = gnutls_priority
2669
2033
IPv6_TCPServer.__init__(self, server_address,
2670
2034
RequestHandlerClass,
2671
interface=interface,
2035
interface = interface,
2036
use_ipv6 = use_ipv6,
2037
socketfd = socketfd)
2675
2038
def server_activate(self):
2676
2039
if self.enabled:
2677
2040
return socketserver.TCPServer.server_activate(self)
2679
2042
def enable(self):
2680
2043
self.enabled = True
2682
2045
def add_pipe(self, parent_pipe, proc):
2683
2046
# Call "handle_ipc" for both data and EOF events
2685
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2686
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2687
functools.partial(self.handle_ipc,
2688
parent_pipe=parent_pipe,
2691
def handle_ipc(self, source, condition,
2694
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):
2695
2056
# error, or the other end of multiprocessing.Pipe has closed
2696
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2057
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2697
2058
# Wait for other process to exit
2701
2062
# Read a request from the child
2702
2063
request = parent_pipe.recv()
2703
2064
command = request[0]
2705
2066
if command == 'init':
2706
key_id = request[1].decode("ascii")
2707
fpr = request[2].decode("ascii")
2708
address = request[3]
2710
for c in self.clients.values():
2711
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2713
if key_id and c.key_id == key_id:
2716
if fpr and c.fingerprint == fpr:
2068
address = request[2]
2070
for c in self.clients.itervalues():
2071
if c.fingerprint == fpr:
2720
logger.info("Client not found for key ID: %s, address"
2721
": %s", key_id or fpr, address)
2075
logger.info("Client not found for fingerprint: %s, ad"
2076
"dress: %s", fpr, address)
2722
2077
if self.use_dbus:
2723
2078
# Emit D-Bus signal
2724
mandos_dbus_service.ClientNotFound(key_id or fpr,
2079
mandos_dbus_service.ClientNotFound(fpr,
2726
2081
parent_pipe.send(False)
2730
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2731
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2732
functools.partial(self.handle_ipc,
2733
parent_pipe=parent_pipe,
2735
client_object=client))
2084
gobject.io_add_watch(parent_pipe.fileno(),
2085
gobject.IO_IN | gobject.IO_HUP,
2086
functools.partial(self.handle_ipc,
2736
2092
parent_pipe.send(True)
2737
2093
# remove the old hook in favor of the new above hook on
2741
2097
funcname = request[1]
2742
2098
args = request[2]
2743
2099
kwargs = request[3]
2745
2101
parent_pipe.send(('data', getattr(client_object,
2746
2102
funcname)(*args,
2749
2105
if command == 'getattr':
2750
2106
attrname = request[1]
2751
if isinstance(client_object.__getattribute__(attrname),
2752
collections.Callable):
2753
parent_pipe.send(('function', ))
2107
if callable(client_object.__getattribute__(attrname)):
2108
parent_pipe.send(('function',))
2756
'data', client_object.__getattribute__(attrname)))
2110
parent_pipe.send(('data', client_object
2111
.__getattribute__(attrname)))
2758
2113
if command == 'setattr':
2759
2114
attrname = request[1]
2760
2115
value = request[2]
2761
2116
setattr(client_object, attrname, value)
2766
2121
def rfc3339_duration_to_delta(duration):
2767
2122
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2769
>>> rfc3339_duration_to_delta("P7D") == datetime.timedelta(7)
2771
>>> rfc3339_duration_to_delta("PT60S") == datetime.timedelta(0, 60)
2773
>>> rfc3339_duration_to_delta("PT60M") == datetime.timedelta(0, 3600)
2775
>>> rfc3339_duration_to_delta("PT24H") == datetime.timedelta(1)
2777
>>> rfc3339_duration_to_delta("P1W") == datetime.timedelta(7)
2779
>>> rfc3339_duration_to_delta("PT5M30S") == datetime.timedelta(0, 330)
2781
>>> rfc3339_duration_to_delta("P1DT3M20S") == datetime.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)
2785
2140
# Parsing an RFC 3339 duration with regular expressions is not
2786
2141
# possible - there would have to be multiple places for the same
2787
2142
# values, like seconds. The current code, while more esoteric, is
2788
2143
# cleaner without depending on a parsing library. If Python had a
2789
2144
# built-in library for parsing we would use it, but we'd like to
2790
2145
# avoid excessive use of external libraries.
2792
2147
# New type for defining tokens, syntax, and semantics all-in-one
2793
Token = collections.namedtuple("Token", (
2794
"regexp", # To match token; if "value" is not None, must have
2795
# a "group" containing digits
2796
"value", # datetime.timedelta or None
2797
"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
2798
2157
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2799
2158
# the "duration" ABNF definition in RFC 3339, Appendix A.
2800
2159
token_end = Token(re.compile(r"$"), None, frozenset())
2801
2160
token_second = Token(re.compile(r"(\d+)S"),
2802
2161
datetime.timedelta(seconds=1),
2803
frozenset((token_end, )))
2162
frozenset((token_end,)))
2804
2163
token_minute = Token(re.compile(r"(\d+)M"),
2805
2164
datetime.timedelta(minutes=1),
2806
2165
frozenset((token_second, token_end)))
3138
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3140
2494
except OSError as error:
3141
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3142
.format(uid, gid, os.strerror(error.errno)))
3143
2495
if error.errno != errno.EPERM:
3147
2499
# Enable all possible GnuTLS debugging
3149
2501
# "Use a log level over 10 to enable all debugging options."
3150
2502
# - GnuTLS manual
3151
gnutls.global_set_log_level(11)
2503
gnutls.library.functions.gnutls_global_set_log_level(11)
2505
@gnutls.library.types.gnutls_log_func
3154
2506
def debug_gnutls(level, string):
3155
2507
logger.debug("GnuTLS: %s", string[:-1])
3157
gnutls.global_set_log_function(debug_gnutls)
2509
(gnutls.library.functions
2510
.gnutls_global_set_log_function(debug_gnutls))
3159
2512
# Redirect stdin so all checkers get /dev/null
3160
2513
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
3161
2514
os.dup2(null, sys.stdin.fileno())
3165
2518
# Need to fork before connecting to D-Bus
3166
2519
if not foreground:
3167
2520
# Close all input and output, do double fork, etc.
3170
if gi.version_info < (3, 10, 2):
3171
# multiprocessing will use threads, so before we use GLib we
3172
# 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()
3175
2527
global main_loop
3176
2528
# From the Avahi example code
3177
2529
DBusGMainLoop(set_as_default=True)
3178
main_loop = GLib.MainLoop()
2530
main_loop = gobject.MainLoop()
3179
2531
bus = dbus.SystemBus()
3180
2532
# End of Avahi example code
3183
2535
bus_name = dbus.service.BusName("se.recompile.Mandos",
3186
old_bus_name = dbus.service.BusName(
3187
"se.bsnet.fukt.Mandos", bus,
3189
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:
3190
2541
logger.error("Disabling D-Bus:", exc_info=e)
3191
2542
use_dbus = False
3192
2543
server_settings["use_dbus"] = False
3193
2544
tcp_server.use_dbus = False
3195
2546
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3196
service = AvahiServiceToSyslog(
3197
name=server_settings["servicename"],
3198
servicetype="_mandos._tcp",
2547
service = AvahiServiceToSyslog(name =
2548
server_settings["servicename"],
2549
servicetype = "_mandos._tcp",
2550
protocol = protocol, bus = bus)
3201
2551
if server_settings["interface"]:
3202
service.interface = if_nametoindex(
3203
server_settings["interface"].encode("utf-8"))
2552
service.interface = (if_nametoindex
2553
(server_settings["interface"]
3205
2556
global multiprocessing_manager
3206
2557
multiprocessing_manager = multiprocessing.Manager()
3208
2559
client_class = Client
3210
client_class = functools.partial(ClientDBus, bus=bus)
2561
client_class = functools.partial(ClientDBus, bus = bus)
3212
2563
client_settings = Client.config_parser(client_config)
3213
2564
old_client_settings = {}
3214
2565
clients_data = {}
3216
2567
# This is used to redirect stdout and stderr for checker processes
3218
wnull = open(os.devnull, "w") # A writable /dev/null
2569
wnull = open(os.devnull, "w") # A writable /dev/null
3219
2570
# Only used if server is running in foreground but not in debug
3221
2572
if debug or not foreground:
3224
2575
# Get client data and settings from last running state.
3225
2576
if server_settings["restore"]:
3227
2578
with open(stored_state_path, "rb") as stored_state:
3228
if sys.version_info.major == 2:
3229
clients_data, old_client_settings = pickle.load(
3232
bytes_clients_data, bytes_old_client_settings = (
3233
pickle.load(stored_state, encoding="bytes"))
3234
# Fix bytes to strings
3237
clients_data = {(key.decode("utf-8")
3238
if isinstance(key, bytes)
3241
bytes_clients_data.items()}
3242
del bytes_clients_data
3243
for key in clients_data:
3244
value = {(k.decode("utf-8")
3245
if isinstance(k, bytes) else k): v
3247
clients_data[key].items()}
3248
clients_data[key] = value
3250
value["client_structure"] = [
3252
if isinstance(s, bytes)
3254
value["client_structure"]]
3255
# .name, .host, and .checker_command
3256
for k in ("name", "host", "checker_command"):
3257
if isinstance(value[k], bytes):
3258
value[k] = value[k].decode("utf-8")
3259
if "key_id" not in value:
3260
value["key_id"] = ""
3261
elif "fingerprint" not in value:
3262
value["fingerprint"] = ""
3263
# old_client_settings
3265
old_client_settings = {
3266
(key.decode("utf-8")
3267
if isinstance(key, bytes)
3270
bytes_old_client_settings.items()}
3271
del bytes_old_client_settings
3272
# .host and .checker_command
3273
for value in old_client_settings.values():
3274
for attribute in ("host", "checker_command"):
3275
if isinstance(value[attribute], bytes):
3276
value[attribute] = (value[attribute]
2579
clients_data, old_client_settings = (pickle.load
3278
2581
os.remove(stored_state_path)
3279
2582
except IOError as e:
3280
2583
if e.errno == errno.ENOENT:
3281
logger.warning("Could not load persistent state:"
3282
" {}".format(os.strerror(e.errno)))
2584
logger.warning("Could not load persistent state: {}"
2585
.format(os.strerror(e.errno)))
3284
2587
logger.critical("Could not load persistent state:",
3287
2590
except EOFError as e:
3288
2591
logger.warning("Could not load persistent state: "
2592
"EOFError:", exc_info=e)
3292
2594
with PGPEngine() as pgp:
3293
2595
for client_name, client in clients_data.items():
3294
2596
# Skip removed clients
3295
2597
if client_name not in client_settings:
3298
2600
# Decide which value to use after restoring saved state.
3299
2601
# We have three different values: Old config file,
3300
2602
# new config file, and saved state.
3358
2660
for client_name in (set(client_settings)
3359
2661
- set(old_client_settings)):
3360
2662
clients_data[client_name] = client_settings[client_name]
3362
2664
# Create all client objects
3363
2665
for client_name, client in clients_data.items():
3364
2666
tcp_server.clients[client_name] = client_class(
3367
server_settings=server_settings)
2667
name = client_name, settings = client,
2668
server_settings = server_settings)
3369
2670
if not tcp_server.clients:
3370
2671
logger.warning("No clients defined")
3372
2673
if not foreground:
3373
2674
if pidfile is not None:
3377
print(pid, file=pidfile)
2678
pidfile.write("{}\n".format(pid).encode("utf-8"))
3378
2679
except IOError:
3379
2680
logger.error("Could not write to file %r with PID %d",
3380
2681
pidfilename, pid)
3382
2683
del pidfilename
3384
for termsig in (signal.SIGHUP, signal.SIGTERM):
3385
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3386
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())
3390
@alternate_dbus_interfaces(
3391
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3392
class MandosDBusService(DBusObjectWithObjectManager):
2689
@alternate_dbus_interfaces({"se.recompile.Mandos":
2690
"se.bsnet.fukt.Mandos"})
2691
class MandosDBusService(DBusObjectWithProperties):
3393
2692
"""A D-Bus proxy object"""
3395
2693
def __init__(self):
3396
2694
dbus.service.Object.__init__(self, bus, "/")
3398
2695
_interface = "se.recompile.Mandos"
2697
@dbus_interface_annotations(_interface)
2699
return { "org.freedesktop.DBus.Property"
2700
".EmitsChangedSignal":
3400
2703
@dbus.service.signal(_interface, signature="o")
3401
2704
def ClientAdded(self, objpath):
3405
2708
@dbus.service.signal(_interface, signature="ss")
3406
def ClientNotFound(self, key_id, address):
2709
def ClientNotFound(self, fingerprint, address):
3410
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3412
2713
@dbus.service.signal(_interface, signature="os")
3413
2714
def ClientRemoved(self, objpath, name):
3417
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3419
2718
@dbus.service.method(_interface, out_signature="ao")
3420
2719
def GetAllClients(self):
3422
return dbus.Array(c.dbus_object_path for c in
3423
tcp_server.clients.values())
3425
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2721
return dbus.Array(c.dbus_object_path
2723
tcp_server.clients.itervalues())
3427
2725
@dbus.service.method(_interface,
3428
2726
out_signature="a{oa{sv}}")
3429
2727
def GetAllClientsWithProperties(self):
3431
2729
return dbus.Dictionary(
3432
{c.dbus_object_path: c.GetAll(
3433
"se.recompile.Mandos.Client")
3434
for c in tcp_server.clients.values()},
2730
{ c.dbus_object_path: c.GetAll("")
2731
for c in tcp_server.clients.itervalues() },
3435
2732
signature="oa{sv}")
3437
2734
@dbus.service.method(_interface, in_signature="o")
3438
2735
def RemoveClient(self, object_path):
3440
for c in tcp_server.clients.values():
2737
for c in tcp_server.clients.itervalues():
3441
2738
if c.dbus_object_path == object_path:
3442
2739
del tcp_server.clients[c.name]
3443
2740
c.remove_from_connection()
3444
# Don't signal the disabling
2741
# Don't signal anything except ClientRemoved
3445
2742
c.disable(quiet=True)
3446
# Emit D-Bus signal for removal
3447
self.client_removed_signal(c)
2744
self.ClientRemoved(object_path, c.name)
3449
2746
raise KeyError(object_path)
3453
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3454
out_signature="a{oa{sa{sv}}}")
3455
def GetManagedObjects(self):
3457
return dbus.Dictionary(
3458
{client.dbus_object_path:
3460
{interface: client.GetAll(interface)
3462
client._get_all_interface_names()})
3463
for client in tcp_server.clients.values()})
3465
def client_added_signal(self, client):
3466
"""Send the new standard signal and the old signal"""
3468
# New standard signal
3469
self.InterfacesAdded(
3470
client.dbus_object_path,
3472
{interface: client.GetAll(interface)
3474
client._get_all_interface_names()}))
3476
self.ClientAdded(client.dbus_object_path)
3478
def client_removed_signal(self, client):
3479
"""Send the new standard signal and the old signal"""
3481
# New standard signal
3482
self.InterfacesRemoved(
3483
client.dbus_object_path,
3484
client._get_all_interface_names())
3486
self.ClientRemoved(client.dbus_object_path,
3489
2750
mandos_dbus_service = MandosDBusService()
3491
# Save modules to variables to exempt the modules from being
3492
# unloaded before the function registered with atexit() is run.
3493
mp = multiprocessing
3497
2753
"Cleanup function; run on exit"
3499
2755
service.cleanup()
3501
mp.active_children()
2757
multiprocessing.active_children()
3503
2759
if not (tcp_server.clients or client_settings):
3506
2762
# Store client before exiting. Secrets are encrypted with key
3507
2763
# based on what config file has. If config file is
3508
2764
# removed/edited, old secret will thus be unrecovable.
3510
2766
with PGPEngine() as pgp:
3511
for client in tcp_server.clients.values():
2767
for client in tcp_server.clients.itervalues():
3512
2768
key = client_settings[client.name]["secret"]
3513
2769
client.encrypted_secret = pgp.encrypt(client.secret,
3515
2771
client_dict = {}
3517
2773
# A list of attributes that can not be pickled
3519
exclude = {"bus", "changedstate", "secret",
3520
"checker", "server_settings"}
3521
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)):
3523
2779
exclude.add(name)
3525
2781
client_dict["encrypted_secret"] = (client
3526
2782
.encrypted_secret)
3527
2783
for attr in client.client_structure:
3528
2784
if attr not in exclude:
3529
2785
client_dict[attr] = getattr(client, attr)
3531
2787
clients[client.name] = client_dict
3532
2788
del client_settings[client.name]["secret"]
3535
with tempfile.NamedTemporaryFile(
3539
dir=os.path.dirname(stored_state_path),
3540
delete=False) as stored_state:
3541
pickle.dump((clients, client_settings), stored_state,
3543
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
3544
2797
os.rename(tempname, stored_state_path)
3545
2798
except (IOError, OSError) as e: