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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,
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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# 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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def decrypt(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, '--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"))
304
for s in t), signature="ay")
305
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"""
510
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."""
521
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
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KEYID_USE_SHA256 = 1 # gnutls/x509.h
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OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
548
class session_int(ctypes.Structure):
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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):
559
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
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('size', ctypes.c_uint)]
562
class openpgp_crt_int(ctypes.Structure):
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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
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transport_ptr_t = ctypes.c_void_p
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close_request_t = ctypes.c_int
572
class Error(Exception):
573
def __init__(self, message=None, code=None, args=()):
574
# Default usage is by a message string, but if a return
575
# code is passed, convert it to a string with
578
if message is None and code is not None:
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message = gnutls.strerror(code)
580
return super(gnutls.Error, self).__init__(
583
class CertificateSecurityError(Error):
589
self._c_object = gnutls.certificate_credentials_t()
590
gnutls.certificate_allocate_credentials(
591
ctypes.byref(self._c_object))
592
self.type = gnutls.CRD_CERTIFICATE
595
gnutls.certificate_free_credentials(self._c_object)
598
def __init__(self, socket, credentials=None):
599
self._c_object = gnutls.session_t()
600
gnutls_flags = gnutls.CLIENT
601
if gnutls.check_version(b"3.5.6"):
602
gnutls_flags |= gnutls.NO_TICKETS
604
gnutls_flags |= gnutls.ENABLE_RAWPK
605
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
607
gnutls.set_default_priority(self._c_object)
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gnutls.transport_set_ptr(self._c_object, socket.fileno())
609
gnutls.handshake_set_private_extensions(self._c_object,
612
if credentials is None:
613
credentials = gnutls.Credentials()
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gnutls.credentials_set(self._c_object, credentials.type,
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ctypes.cast(credentials._c_object,
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self.credentials = credentials
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gnutls.deinit(self._c_object)
623
return gnutls.handshake(self._c_object)
625
def send(self, data):
629
data_len -= gnutls.record_send(self._c_object,
634
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
636
# Error handling functions
637
def _error_code(result):
638
"""A function to raise exceptions on errors, suitable
639
for the 'restype' attribute on ctypes functions"""
642
if result == gnutls.E_NO_CERTIFICATE_FOUND:
643
raise gnutls.CertificateSecurityError(code=result)
644
raise gnutls.Error(code=result)
646
def _retry_on_error(result, func, arguments):
647
"""A function to retry on some errors, suitable
648
for the 'errcheck' attribute on ctypes functions"""
650
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
651
return _error_code(result)
652
result = func(*arguments)
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# Unless otherwise indicated, the function declarations below are
656
# all from the gnutls/gnutls.h C header file.
659
priority_set_direct = _library.gnutls_priority_set_direct
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priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
661
ctypes.POINTER(ctypes.c_char_p)]
662
priority_set_direct.restype = _error_code
664
init = _library.gnutls_init
665
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
666
init.restype = _error_code
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set_default_priority = _library.gnutls_set_default_priority
669
set_default_priority.argtypes = [session_t]
670
set_default_priority.restype = _error_code
672
record_send = _library.gnutls_record_send
673
record_send.argtypes = [session_t, ctypes.c_void_p,
675
record_send.restype = ctypes.c_ssize_t
676
record_send.errcheck = _retry_on_error
678
certificate_allocate_credentials = (
679
_library.gnutls_certificate_allocate_credentials)
680
certificate_allocate_credentials.argtypes = [
681
ctypes.POINTER(certificate_credentials_t)]
682
certificate_allocate_credentials.restype = _error_code
684
certificate_free_credentials = (
685
_library.gnutls_certificate_free_credentials)
686
certificate_free_credentials.argtypes = [
687
certificate_credentials_t]
688
certificate_free_credentials.restype = None
690
handshake_set_private_extensions = (
691
_library.gnutls_handshake_set_private_extensions)
692
handshake_set_private_extensions.argtypes = [session_t,
694
handshake_set_private_extensions.restype = None
696
credentials_set = _library.gnutls_credentials_set
697
credentials_set.argtypes = [session_t, credentials_type_t,
699
credentials_set.restype = _error_code
701
strerror = _library.gnutls_strerror
702
strerror.argtypes = [ctypes.c_int]
703
strerror.restype = ctypes.c_char_p
705
certificate_type_get = _library.gnutls_certificate_type_get
706
certificate_type_get.argtypes = [session_t]
707
certificate_type_get.restype = _error_code
709
certificate_get_peers = _library.gnutls_certificate_get_peers
710
certificate_get_peers.argtypes = [session_t,
711
ctypes.POINTER(ctypes.c_uint)]
712
certificate_get_peers.restype = ctypes.POINTER(datum_t)
714
global_set_log_level = _library.gnutls_global_set_log_level
715
global_set_log_level.argtypes = [ctypes.c_int]
716
global_set_log_level.restype = None
718
global_set_log_function = _library.gnutls_global_set_log_function
719
global_set_log_function.argtypes = [log_func]
720
global_set_log_function.restype = None
722
deinit = _library.gnutls_deinit
723
deinit.argtypes = [session_t]
724
deinit.restype = None
726
handshake = _library.gnutls_handshake
727
handshake.argtypes = [session_t]
728
handshake.restype = _error_code
729
handshake.errcheck = _retry_on_error
731
transport_set_ptr = _library.gnutls_transport_set_ptr
732
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
733
transport_set_ptr.restype = None
735
bye = _library.gnutls_bye
736
bye.argtypes = [session_t, close_request_t]
737
bye.restype = _error_code
738
bye.errcheck = _retry_on_error
740
check_version = _library.gnutls_check_version
741
check_version.argtypes = [ctypes.c_char_p]
742
check_version.restype = ctypes.c_char_p
744
_need_version = b"3.3.0"
745
if check_version(_need_version) is None:
746
raise self.Error("Needs GnuTLS {} or later"
747
.format(_need_version))
749
_tls_rawpk_version = b"3.6.6"
750
has_rawpk = bool(check_version(_tls_rawpk_version))
754
class pubkey_st(ctypes.Structure):
756
pubkey_t = ctypes.POINTER(pubkey_st)
758
x509_crt_fmt_t = ctypes.c_int
760
# All the function declarations below are from gnutls/abstract.h
761
pubkey_init = _library.gnutls_pubkey_init
762
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
763
pubkey_init.restype = _error_code
765
pubkey_import = _library.gnutls_pubkey_import
766
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
768
pubkey_import.restype = _error_code
770
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
771
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
772
ctypes.POINTER(ctypes.c_ubyte),
773
ctypes.POINTER(ctypes.c_size_t)]
774
pubkey_get_key_id.restype = _error_code
776
pubkey_deinit = _library.gnutls_pubkey_deinit
777
pubkey_deinit.argtypes = [pubkey_t]
778
pubkey_deinit.restype = None
780
# All the function declarations below are from gnutls/openpgp.h
782
openpgp_crt_init = _library.gnutls_openpgp_crt_init
783
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
784
openpgp_crt_init.restype = _error_code
786
openpgp_crt_import = _library.gnutls_openpgp_crt_import
787
openpgp_crt_import.argtypes = [openpgp_crt_t,
788
ctypes.POINTER(datum_t),
790
openpgp_crt_import.restype = _error_code
792
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
793
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
794
ctypes.POINTER(ctypes.c_uint)]
795
openpgp_crt_verify_self.restype = _error_code
797
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
798
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
799
openpgp_crt_deinit.restype = None
801
openpgp_crt_get_fingerprint = (
802
_library.gnutls_openpgp_crt_get_fingerprint)
803
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
807
openpgp_crt_get_fingerprint.restype = _error_code
809
if check_version(b"3.6.4"):
810
certificate_type_get2 = _library.gnutls_certificate_type_get2
811
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
812
certificate_type_get2.restype = _error_code
814
# Remove non-public functions
815
del _error_code, _retry_on_error
818
def call_pipe(connection, # : multiprocessing.Connection
819
func, *args, **kwargs):
820
"""This function is meant to be called by multiprocessing.Process
822
This function runs func(*args, **kwargs), and writes the resulting
823
return value on the provided multiprocessing.Connection.
825
connection.send(func(*args, **kwargs))
404
class Client(object):
830
405
"""A representation of a client host served by this server.
833
408
approved: bool(); 'None' if not yet approved/disapproved
834
409
approval_delay: datetime.timedelta(); Time to wait for approval
835
410
approval_duration: datetime.timedelta(); Duration of one approval
836
checker: multiprocessing.Process(); a running checker process used
837
to see if the client lives. 'None' if no process is
839
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
840
415
checker_command: string; External command which is run to check
841
416
if client lives. %() expansions are done at
842
417
runtime with vars(self) as dict, so that for
843
418
instance %(name)s can be used in the command.
844
checker_initiator_tag: a GLib event source tag, or None
419
checker_initiator_tag: a gobject event source tag, or None
845
420
created: datetime.datetime(); (UTC) object creation
846
421
client_structure: Object describing what attributes a client has
847
422
and is used for storing the client at exit
848
423
current_checker_command: string; current running checker_command
849
disable_initiator_tag: a GLib event source tag, or None
424
disable_initiator_tag: a gobject event source tag, or None
851
426
fingerprint: string (40 or 32 hexadecimal digits); used to
852
uniquely identify an OpenPGP client
853
key_id: string (64 hexadecimal digits); used to uniquely identify
854
a client using raw public keys
427
uniquely identify the client
855
428
host: string; available for use by the checker command
856
429
interval: datetime.timedelta(); How often to start a new checker
857
430
last_approval_request: datetime.datetime(); (UTC) or None
1014
582
logger.info("Disabling client %s", self.name)
1015
583
if getattr(self, "disable_initiator_tag", None) is not None:
1016
GLib.source_remove(self.disable_initiator_tag)
584
gobject.source_remove(self.disable_initiator_tag)
1017
585
self.disable_initiator_tag = None
1018
586
self.expires = None
1019
587
if getattr(self, "checker_initiator_tag", None) is not None:
1020
GLib.source_remove(self.checker_initiator_tag)
588
gobject.source_remove(self.checker_initiator_tag)
1021
589
self.checker_initiator_tag = None
1022
590
self.stop_checker()
1023
591
self.enabled = False
1025
593
self.send_changedstate()
1026
# 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
1029
597
def __del__(self):
1032
600
def init_checker(self):
1033
601
# Schedule a new checker to be started an 'interval' from now,
1034
602
# and every interval from then on.
1035
603
if self.checker_initiator_tag is not None:
1036
GLib.source_remove(self.checker_initiator_tag)
1037
self.checker_initiator_tag = GLib.timeout_add(
1038
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),
1040
609
# Schedule a disable() when 'timeout' has passed
1041
610
if self.disable_initiator_tag is not None:
1042
GLib.source_remove(self.disable_initiator_tag)
1043
self.disable_initiator_tag = GLib.timeout_add(
1044
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),
1045
616
# Also start a new checker *right now*.
1046
617
self.start_checker()
1048
def checker_callback(self, source, condition, connection,
619
def checker_callback(self, pid, condition, command):
1050
620
"""The checker has completed, so take appropriate actions."""
1051
# Read return code from connection (see call_pipe)
1052
returncode = connection.recv()
1054
if self.checker is not None:
1056
621
self.checker_callback_tag = None
1057
622
self.checker = None
1060
self.last_checker_status = returncode
1061
self.last_checker_signal = None
623
if os.WIFEXITED(condition):
624
self.last_checker_status = os.WEXITSTATUS(condition)
1062
625
if self.last_checker_status == 0:
1063
626
logger.info("Checker for %(name)s succeeded",
1065
628
self.checked_ok()
1067
logger.info("Checker for %(name)s failed", vars(self))
630
logger.info("Checker for %(name)s failed",
1069
633
self.last_checker_status = -1
1070
self.last_checker_signal = -returncode
1071
634
logger.warning("Checker for %(name)s crashed?",
1075
637
def checked_ok(self):
1076
638
"""Assert that the client has been seen, alive and well."""
1077
639
self.last_checked_ok = datetime.datetime.utcnow()
1078
640
self.last_checker_status = 0
1079
self.last_checker_signal = None
1080
641
self.bump_timeout()
1082
643
def bump_timeout(self, timeout=None):
1083
644
"""Bump up the timeout for this client."""
1084
645
if timeout is None:
1085
646
timeout = self.timeout
1086
647
if self.disable_initiator_tag is not None:
1087
GLib.source_remove(self.disable_initiator_tag)
648
gobject.source_remove(self.disable_initiator_tag)
1088
649
self.disable_initiator_tag = None
1089
650
if getattr(self, "enabled", False):
1090
self.disable_initiator_tag = GLib.timeout_add(
1091
int(timeout.total_seconds() * 1000), self.disable)
651
self.disable_initiator_tag = (gobject.timeout_add
652
(int(timeout.total_seconds()
653
* 1000), self.disable))
1092
654
self.expires = datetime.datetime.utcnow() + timeout
1094
656
def need_approval(self):
1095
657
self.last_approval_request = datetime.datetime.utcnow()
1097
659
def start_checker(self):
1098
660
"""Start a new checker subprocess if one is not running.
1100
662
If a checker already exists, leave it running and do
1102
664
# The reason for not killing a running checker is that if we
1107
669
# checkers alone, the checker would have to take more time
1108
670
# than 'timeout' for the client to be disabled, which is as it
1111
if self.checker is not None and not self.checker.is_alive():
1112
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)
1115
687
# Start a new checker if needed
1116
688
if self.checker is None:
1117
689
# Escape attributes for the shell
1119
attr: re.escape(str(getattr(self, attr)))
1120
for attr in self.runtime_expansions}
690
escaped_attrs = { attr:
691
re.escape(str(getattr(self, attr)))
692
for attr in self.runtime_expansions }
1122
694
command = self.checker_command % escaped_attrs
1123
695
except TypeError as error:
1124
696
logger.error('Could not format string "%s"',
1125
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",
1127
return True # Try again later
1128
self.current_checker_command = command
1129
logger.info("Starting checker %r for %s", command,
1131
# We don't need to redirect stdout and stderr, since
1132
# in normal mode, that is already done by daemon(),
1133
# and in debug mode we don't want to. (Stdin is
1134
# always replaced by /dev/null.)
1135
# The exception is when not debugging but nevertheless
1136
# running in the foreground; use the previously
1138
popen_args = {"close_fds": True,
1141
if (not self.server_settings["debug"]
1142
and self.server_settings["foreground"]):
1143
popen_args.update({"stdout": wnull,
1145
pipe = multiprocessing.Pipe(duplex=False)
1146
self.checker = multiprocessing.Process(
1148
args=(pipe[1], subprocess.call, command),
1150
self.checker.start()
1151
self.checker_callback_tag = GLib.io_add_watch(
1152
GLib.IOChannel.unix_new(pipe[0].fileno()),
1153
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
1154
self.checker_callback, pipe[0], command)
1155
# 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
1158
744
def stop_checker(self):
1159
745
"""Force the checker process, if any, to stop."""
1160
746
if self.checker_callback_tag:
1161
GLib.source_remove(self.checker_callback_tag)
747
gobject.source_remove(self.checker_callback_tag)
1162
748
self.checker_callback_tag = None
1163
749
if getattr(self, "checker", None) is None:
1165
751
logger.debug("Stopping checker for %(name)s", vars(self))
1166
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
1167
760
self.checker = None
1170
def dbus_service_property(dbus_interface,
763
def dbus_service_property(dbus_interface, signature="v",
764
access="readwrite", byte_arrays=False):
1174
765
"""Decorators for marking methods of a DBusObjectWithProperties to
1175
766
become properties on the D-Bus.
1177
768
The decorated method will be called with no arguments by "Get"
1178
769
and with one argument by "Set".
1180
771
The parameters, where they are supported, are the same as
1181
772
dbus.service.method, except there is only "signature", since the
1182
773
type from Get() and the type sent to Set() is the same.
1265
class DBusObjectWithAnnotations(dbus.service.Object):
1266
"""A D-Bus object with annotations.
1268
Classes inheriting from this can use the dbus_annotations
1269
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.
1273
856
def _is_dbus_thing(thing):
1274
857
"""Returns a function testing if an attribute is a D-Bus thing
1276
859
If called like _is_dbus_thing("method") it returns a function
1277
860
suitable for use as predicate to inspect.getmembers().
1279
862
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1282
865
def _get_all_dbus_things(self, thing):
1283
866
"""Returns a generator of (name, attribute) pairs
1285
return ((getattr(athing.__get__(self), "_dbus_name", name),
868
return ((getattr(athing.__get__(self), "_dbus_name",
1286
870
athing.__get__(self))
1287
871
for cls in self.__class__.__mro__
1288
872
for name, athing in
1289
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1291
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1293
path_keyword='object_path',
1294
connection_keyword='connection')
1295
def Introspect(self, object_path, connection):
1296
"""Overloading of standard D-Bus method.
1298
Inserts annotation tags on methods and signals.
1300
xmlstring = dbus.service.Object.Introspect(self, object_path,
1303
document = xml.dom.minidom.parseString(xmlstring)
1305
for if_tag in document.getElementsByTagName("interface"):
1306
# Add annotation tags
1307
for typ in ("method", "signal"):
1308
for tag in if_tag.getElementsByTagName(typ):
1310
for name, prop in (self.
1311
_get_all_dbus_things(typ)):
1312
if (name == tag.getAttribute("name")
1313
and prop._dbus_interface
1314
== if_tag.getAttribute("name")):
1315
annots.update(getattr(
1316
prop, "_dbus_annotations", {}))
1317
for name, value in annots.items():
1318
ann_tag = document.createElement(
1320
ann_tag.setAttribute("name", name)
1321
ann_tag.setAttribute("value", value)
1322
tag.appendChild(ann_tag)
1323
# Add interface annotation tags
1324
for annotation, value in dict(
1325
itertools.chain.from_iterable(
1326
annotations().items()
1327
for name, annotations
1328
in self._get_all_dbus_things("interface")
1329
if name == if_tag.getAttribute("name")
1331
ann_tag = document.createElement("annotation")
1332
ann_tag.setAttribute("name", annotation)
1333
ann_tag.setAttribute("value", value)
1334
if_tag.appendChild(ann_tag)
1335
# Fix argument name for the Introspect method itself
1336
if (if_tag.getAttribute("name")
1337
== dbus.INTROSPECTABLE_IFACE):
1338
for cn in if_tag.getElementsByTagName("method"):
1339
if cn.getAttribute("name") == "Introspect":
1340
for arg in cn.getElementsByTagName("arg"):
1341
if (arg.getAttribute("direction")
1343
arg.setAttribute("name",
1345
xmlstring = document.toxml("utf-8")
1347
except (AttributeError, xml.dom.DOMException,
1348
xml.parsers.expat.ExpatError) as error:
1349
logger.error("Failed to override Introspection method",
1354
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1355
"""A D-Bus object with properties.
1357
Classes inheriting from this can use the dbus_service_property
1358
decorator to expose methods as D-Bus properties. It exposes the
1359
standard Get(), Set(), and GetAll() methods on the D-Bus.
873
inspect.getmembers(cls,
874
self._is_dbus_thing(thing)))
1362
876
def _get_dbus_property(self, interface_name, property_name):
1363
877
"""Returns a bound method if one exists which is a D-Bus
1364
878
property with the specified name and interface.
1366
for cls in self.__class__.__mro__:
1367
for name, value in inspect.getmembers(
1368
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"))):
1369
884
if (value._dbus_name == property_name
1370
885
and value._dbus_interface == interface_name):
1371
886
return value.__get__(self)
1373
888
# No such property
1374
raise DBusPropertyNotFound("{}:{}.{}".format(
1375
self.dbus_object_path, interface_name, property_name))
1378
def _get_all_interface_names(cls):
1379
"""Get a sequence of all interfaces supported by an object"""
1380
return (name for name in set(getattr(getattr(x, attr),
1381
"_dbus_interface", None)
1382
for x in (inspect.getmro(cls))
1384
if name is not None)
1386
@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",
1388
894
out_signature="v")
1389
895
def Get(self, interface_name, property_name):
1390
896
"""Standard D-Bus property Get() method, see D-Bus standard.
1518
1036
return xmlstring
1522
dbus.OBJECT_MANAGER_IFACE
1523
except AttributeError:
1524
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1527
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1528
"""A D-Bus object with an ObjectManager.
1530
Classes inheriting from this exposes the standard
1531
GetManagedObjects call and the InterfacesAdded and
1532
InterfacesRemoved signals on the standard
1533
"org.freedesktop.DBus.ObjectManager" interface.
1535
Note: No signals are sent automatically; they must be sent
1538
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1539
out_signature="a{oa{sa{sv}}}")
1540
def GetManagedObjects(self):
1541
"""This function must be overridden"""
1542
raise NotImplementedError()
1544
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1545
signature="oa{sa{sv}}")
1546
def InterfacesAdded(self, object_path, interfaces_and_properties):
1549
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1550
def InterfacesRemoved(self, object_path, interfaces):
1553
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1555
path_keyword='object_path',
1556
connection_keyword='connection')
1557
def Introspect(self, object_path, connection):
1558
"""Overloading of standard D-Bus method.
1560
Override return argument name of GetManagedObjects to be
1561
"objpath_interfaces_and_properties"
1563
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1567
document = xml.dom.minidom.parseString(xmlstring)
1569
for if_tag in document.getElementsByTagName("interface"):
1570
# Fix argument name for the GetManagedObjects method
1571
if (if_tag.getAttribute("name")
1572
== dbus.OBJECT_MANAGER_IFACE):
1573
for cn in if_tag.getElementsByTagName("method"):
1574
if (cn.getAttribute("name")
1575
== "GetManagedObjects"):
1576
for arg in cn.getElementsByTagName("arg"):
1577
if (arg.getAttribute("direction")
1581
"objpath_interfaces"
1583
xmlstring = document.toxml("utf-8")
1585
except (AttributeError, xml.dom.DOMException,
1586
xml.parsers.expat.ExpatError) as error:
1587
logger.error("Failed to override Introspection method",
1592
1039
def datetime_to_dbus(dt, variant_level=0):
1593
1040
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1595
return dbus.String("", variant_level=variant_level)
1596
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)
1599
1047
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1960
1407
server to mandos-client
1964
1411
# Rejected - signal
1965
1412
@dbus.service.signal(_interface, signature="s")
1966
1413
def Rejected(self, reason):
1970
1417
# NeedApproval - signal
1971
1418
@dbus.service.signal(_interface, signature="tb")
1972
1419
def NeedApproval(self, timeout, default):
1974
1421
return self.need_approval()
1978
1425
# Approve - method
1979
1426
@dbus.service.method(_interface, in_signature="b")
1980
1427
def Approve(self, value):
1981
1428
self.approve(value)
1983
1430
# CheckedOK - method
1984
1431
@dbus.service.method(_interface)
1985
1432
def CheckedOK(self):
1986
1433
self.checked_ok()
1988
1435
# Enable - method
1989
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1990
1436
@dbus.service.method(_interface)
1991
1437
def Enable(self):
1995
1441
# StartChecker - method
1996
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1997
1442
@dbus.service.method(_interface)
1998
1443
def StartChecker(self):
2000
1445
self.start_checker()
2002
1447
# Disable - method
2003
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2004
1448
@dbus.service.method(_interface)
2005
1449
def Disable(self):
2009
1453
# StopChecker - method
2010
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2011
1454
@dbus.service.method(_interface)
2012
1455
def StopChecker(self):
2013
1456
self.stop_checker()
2017
1460
# ApprovalPending - property
2018
1461
@dbus_service_property(_interface, signature="b", access="read")
2019
1462
def ApprovalPending_dbus_property(self):
2020
1463
return dbus.Boolean(bool(self.approvals_pending))
2022
1465
# ApprovedByDefault - property
2023
@dbus_service_property(_interface,
1466
@dbus_service_property(_interface, signature="b",
2025
1467
access="readwrite")
2026
1468
def ApprovedByDefault_dbus_property(self, value=None):
2027
1469
if value is None: # get
2028
1470
return dbus.Boolean(self.approved_by_default)
2029
1471
self.approved_by_default = bool(value)
2031
1473
# ApprovalDelay - property
2032
@dbus_service_property(_interface,
1474
@dbus_service_property(_interface, signature="t",
2034
1475
access="readwrite")
2035
1476
def ApprovalDelay_dbus_property(self, value=None):
2036
1477
if value is None: # get
2037
1478
return dbus.UInt64(self.approval_delay.total_seconds()
2039
1480
self.approval_delay = datetime.timedelta(0, 0, 0, value)
2041
1482
# ApprovalDuration - property
2042
@dbus_service_property(_interface,
1483
@dbus_service_property(_interface, signature="t",
2044
1484
access="readwrite")
2045
1485
def ApprovalDuration_dbus_property(self, value=None):
2046
1486
if value is None: # get
2047
1487
return dbus.UInt64(self.approval_duration.total_seconds()
2049
1489
self.approval_duration = datetime.timedelta(0, 0, 0, value)
2051
1491
# Name - property
2053
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2054
1492
@dbus_service_property(_interface, signature="s", access="read")
2055
1493
def Name_dbus_property(self):
2056
1494
return dbus.String(self.name)
2060
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2061
@dbus_service_property(_interface, signature="s", access="read")
2062
def KeyID_dbus_property(self):
2063
return dbus.String(self.key_id)
2065
1496
# Fingerprint - property
2067
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2068
1497
@dbus_service_property(_interface, signature="s", access="read")
2069
1498
def Fingerprint_dbus_property(self):
2070
1499
return dbus.String(self.fingerprint)
2072
1501
# Host - property
2073
@dbus_service_property(_interface,
1502
@dbus_service_property(_interface, signature="s",
2075
1503
access="readwrite")
2076
1504
def Host_dbus_property(self, value=None):
2077
1505
if value is None: # get
2078
1506
return dbus.String(self.host)
2079
1507
self.host = str(value)
2081
1509
# Created - property
2083
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2084
1510
@dbus_service_property(_interface, signature="s", access="read")
2085
1511
def Created_dbus_property(self):
2086
1512
return datetime_to_dbus(self.created)
2088
1514
# LastEnabled - property
2089
1515
@dbus_service_property(_interface, signature="s", access="read")
2090
1516
def LastEnabled_dbus_property(self):
2091
1517
return datetime_to_dbus(self.last_enabled)
2093
1519
# Enabled - property
2094
@dbus_service_property(_interface,
1520
@dbus_service_property(_interface, signature="b",
2096
1521
access="readwrite")
2097
1522
def Enabled_dbus_property(self, value=None):
2098
1523
if value is None: # get
2380
1788
delay -= time2 - time
2383
session.send(client.secret)
2384
except gnutls.Error as error:
2385
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))
2389
1803
logger.info("Sending secret to %s", client.name)
2390
1804
# bump the timeout using extended_timeout
2391
1805
client.bump_timeout(client.extended_timeout)
2392
1806
if self.server.use_dbus:
2393
1807
# Emit D-Bus signal
2394
1808
client.GotSecret()
2397
1811
if approval_required:
2398
1812
client.approvals_pending -= 1
2401
except gnutls.Error as error:
1815
except gnutls.errors.GNUTLSError as error:
2402
1816
logger.warning("GnuTLS bye failed",
2403
1817
exc_info=error)
2406
1820
def peer_certificate(session):
2407
"Return the peer's certificate as a bytestring"
2409
cert_type = gnutls.certificate_type_get2(session._c_object,
2411
except AttributeError:
2412
cert_type = gnutls.certificate_type_get(session._c_object)
2413
if gnutls.has_rawpk:
2414
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2416
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2417
# If not a valid certificate type...
2418
if cert_type not in valid_cert_types:
2419
logger.info("Cert type %r not in %r", cert_type,
2421
# ...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
2423
1828
list_size = ctypes.c_uint(1)
2424
cert_list = (gnutls.certificate_get_peers
1829
cert_list = (gnutls.library.functions
1830
.gnutls_certificate_get_peers
2425
1831
(session._c_object, ctypes.byref(list_size)))
2426
1832
if not bool(cert_list) and list_size.value != 0:
2427
raise gnutls.Error("error getting peer certificate")
1833
raise gnutls.errors.GNUTLSError("error getting peer"
2428
1835
if list_size.value == 0:
2430
1837
cert = cert_list[0]
2431
1838
return ctypes.string_at(cert.data, cert.size)
2434
def key_id(certificate):
2435
"Convert a certificate bytestring to a hexdigit key ID"
2436
# New GnuTLS "datum" with the public key
2437
datum = gnutls.datum_t(
2438
ctypes.cast(ctypes.c_char_p(certificate),
2439
ctypes.POINTER(ctypes.c_ubyte)),
2440
ctypes.c_uint(len(certificate)))
2441
# XXX all these need to be created in the gnutls "module"
2442
# New empty GnuTLS certificate
2443
pubkey = gnutls.pubkey_t()
2444
gnutls.pubkey_init(ctypes.byref(pubkey))
2445
# Import the raw public key into the certificate
2446
gnutls.pubkey_import(pubkey,
2447
ctypes.byref(datum),
2448
gnutls.X509_FMT_DER)
2449
# New buffer for the key ID
2450
buf = ctypes.create_string_buffer(32)
2451
buf_len = ctypes.c_size_t(len(buf))
2452
# Get the key ID from the raw public key into the buffer
2453
gnutls.pubkey_get_key_id(pubkey,
2454
gnutls.KEYID_USE_SHA256,
2455
ctypes.cast(ctypes.byref(buf),
2456
ctypes.POINTER(ctypes.c_ubyte)),
2457
ctypes.byref(buf_len))
2458
# Deinit the certificate
2459
gnutls.pubkey_deinit(pubkey)
2461
# Convert the buffer to a Python bytestring
2462
key_id = ctypes.string_at(buf, buf_len.value)
2463
# Convert the bytestring to hexadecimal notation
2464
hex_key_id = binascii.hexlify(key_id).upper()
2468
1841
def fingerprint(openpgp):
2469
1842
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2470
1843
# New GnuTLS "datum" with the OpenPGP public key
2471
datum = gnutls.datum_t(
2472
ctypes.cast(ctypes.c_char_p(openpgp),
2473
ctypes.POINTER(ctypes.c_ubyte)),
2474
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))))
2475
1849
# New empty GnuTLS certificate
2476
crt = gnutls.openpgp_crt_t()
2477
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)))
2478
1853
# Import the OpenPGP public key into the certificate
2479
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2480
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))
2481
1858
# Verify the self signature in the key
2482
1859
crtverify = ctypes.c_uint()
2483
gnutls.openpgp_crt_verify_self(crt, 0,
2484
ctypes.byref(crtverify))
1860
(gnutls.library.functions
1861
.gnutls_openpgp_crt_verify_self(crt, 0,
1862
ctypes.byref(crtverify)))
2485
1863
if crtverify.value != 0:
2486
gnutls.openpgp_crt_deinit(crt)
2487
raise gnutls.CertificateSecurityError(code
1864
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1865
raise (gnutls.errors.CertificateSecurityError
2489
1867
# New buffer for the fingerprint
2490
1868
buf = ctypes.create_string_buffer(20)
2491
1869
buf_len = ctypes.c_size_t()
2492
1870
# Get the fingerprint from the certificate into the buffer
2493
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2494
ctypes.byref(buf_len))
1871
(gnutls.library.functions
1872
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1873
ctypes.byref(buf_len)))
2495
1874
# Deinit the certificate
2496
gnutls.openpgp_crt_deinit(crt)
1875
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2497
1876
# Convert the buffer to a Python bytestring
2498
1877
fpr = ctypes.string_at(buf, buf_len.value)
2499
1878
# Convert the bytestring to hexadecimal notation
2588
1961
# socket_wrapper(), if socketfd was set.
2589
1962
socketserver.TCPServer.__init__(self, server_address,
2590
1963
RequestHandlerClass)
2592
1965
def server_bind(self):
2593
1966
"""This overrides the normal server_bind() function
2594
1967
to bind to an interface if one was specified, and also NOT to
2595
1968
bind to an address or port if they were not specified."""
2596
global SO_BINDTODEVICE
2597
1969
if self.interface is not None:
2598
1970
if SO_BINDTODEVICE is None:
2599
# Fall back to a hard-coded value which seems to be
2601
logger.warning("SO_BINDTODEVICE not found, trying 25")
2602
SO_BINDTODEVICE = 25
2604
self.socket.setsockopt(
2605
socket.SOL_SOCKET, SO_BINDTODEVICE,
2606
(self.interface + "\0").encode("utf-8"))
2607
except socket.error as error:
2608
if error.errno == errno.EPERM:
2609
logger.error("No permission to bind to"
2610
" interface %s", self.interface)
2611
elif error.errno == errno.ENOPROTOOPT:
2612
logger.error("SO_BINDTODEVICE not available;"
2613
" cannot bind to interface %s",
2615
elif error.errno == errno.ENODEV:
2616
logger.error("Interface %s does not exist,"
2617
" 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)
2620
1993
# Only bind(2) the socket if we really need to.
2621
1994
if self.server_address[0] or self.server_address[1]:
2622
if self.server_address[1]:
2623
self.allow_reuse_address = True
2624
1995
if not self.server_address[0]:
2625
1996
if self.address_family == socket.AF_INET6:
2626
any_address = "::" # in6addr_any
1997
any_address = "::" # in6addr_any
2628
any_address = "0.0.0.0" # INADDR_ANY
1999
any_address = "0.0.0.0" # INADDR_ANY
2629
2000
self.server_address = (any_address,
2630
2001
self.server_address[1])
2631
2002
elif not self.server_address[1]:
2632
self.server_address = (self.server_address[0], 0)
2003
self.server_address = (self.server_address[0],
2633
2005
# if self.interface:
2634
2006
# self.server_address = (self.server_address[0],
2665
2032
self.gnutls_priority = gnutls_priority
2666
2033
IPv6_TCPServer.__init__(self, server_address,
2667
2034
RequestHandlerClass,
2668
interface=interface,
2035
interface = interface,
2036
use_ipv6 = use_ipv6,
2037
socketfd = socketfd)
2672
2038
def server_activate(self):
2673
2039
if self.enabled:
2674
2040
return socketserver.TCPServer.server_activate(self)
2676
2042
def enable(self):
2677
2043
self.enabled = True
2679
2045
def add_pipe(self, parent_pipe, proc):
2680
2046
# Call "handle_ipc" for both data and EOF events
2682
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2683
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2684
functools.partial(self.handle_ipc,
2685
parent_pipe=parent_pipe,
2688
def handle_ipc(self, source, condition,
2691
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):
2692
2056
# error, or the other end of multiprocessing.Pipe has closed
2693
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2057
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2694
2058
# Wait for other process to exit
2698
2062
# Read a request from the child
2699
2063
request = parent_pipe.recv()
2700
2064
command = request[0]
2702
2066
if command == 'init':
2703
key_id = request[1].decode("ascii")
2704
fpr = request[2].decode("ascii")
2705
address = request[3]
2707
for c in self.clients.values():
2708
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2710
if key_id and c.key_id == key_id:
2713
if fpr and c.fingerprint == fpr:
2068
address = request[2]
2070
for c in self.clients.itervalues():
2071
if c.fingerprint == fpr:
2717
logger.info("Client not found for key ID: %s, address"
2718
": %s", key_id or fpr, address)
2075
logger.info("Client not found for fingerprint: %s, ad"
2076
"dress: %s", fpr, address)
2719
2077
if self.use_dbus:
2720
2078
# Emit D-Bus signal
2721
mandos_dbus_service.ClientNotFound(key_id or fpr,
2079
mandos_dbus_service.ClientNotFound(fpr,
2723
2081
parent_pipe.send(False)
2727
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2728
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2729
functools.partial(self.handle_ipc,
2730
parent_pipe=parent_pipe,
2732
client_object=client))
2084
gobject.io_add_watch(parent_pipe.fileno(),
2085
gobject.IO_IN | gobject.IO_HUP,
2086
functools.partial(self.handle_ipc,
2733
2092
parent_pipe.send(True)
2734
2093
# remove the old hook in favor of the new above hook on
2738
2097
funcname = request[1]
2739
2098
args = request[2]
2740
2099
kwargs = request[3]
2742
2101
parent_pipe.send(('data', getattr(client_object,
2743
2102
funcname)(*args,
2746
2105
if command == 'getattr':
2747
2106
attrname = request[1]
2748
if isinstance(client_object.__getattribute__(attrname),
2749
collections.Callable):
2750
parent_pipe.send(('function', ))
2107
if callable(client_object.__getattribute__(attrname)):
2108
parent_pipe.send(('function',))
2753
'data', client_object.__getattribute__(attrname)))
2110
parent_pipe.send(('data', client_object
2111
.__getattribute__(attrname)))
2755
2113
if command == 'setattr':
2756
2114
attrname = request[1]
2757
2115
value = request[2]
2758
2116
setattr(client_object, attrname, value)
2763
2121
def rfc3339_duration_to_delta(duration):
2764
2122
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2766
>>> rfc3339_duration_to_delta("P7D") == datetime.timedelta(7)
2768
>>> rfc3339_duration_to_delta("PT60S") == datetime.timedelta(0, 60)
2770
>>> rfc3339_duration_to_delta("PT60M") == datetime.timedelta(0, 3600)
2772
>>> rfc3339_duration_to_delta("PT24H") == datetime.timedelta(1)
2774
>>> rfc3339_duration_to_delta("P1W") == datetime.timedelta(7)
2776
>>> rfc3339_duration_to_delta("PT5M30S") == datetime.timedelta(0, 330)
2778
>>> 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)
2782
2140
# Parsing an RFC 3339 duration with regular expressions is not
2783
2141
# possible - there would have to be multiple places for the same
2784
2142
# values, like seconds. The current code, while more esoteric, is
2785
2143
# cleaner without depending on a parsing library. If Python had a
2786
2144
# built-in library for parsing we would use it, but we'd like to
2787
2145
# avoid excessive use of external libraries.
2789
2147
# New type for defining tokens, syntax, and semantics all-in-one
2790
Token = collections.namedtuple("Token", (
2791
"regexp", # To match token; if "value" is not None, must have
2792
# a "group" containing digits
2793
"value", # datetime.timedelta or None
2794
"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
2795
2157
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2796
2158
# the "duration" ABNF definition in RFC 3339, Appendix A.
2797
2159
token_end = Token(re.compile(r"$"), None, frozenset())
2798
2160
token_second = Token(re.compile(r"(\d+)S"),
2799
2161
datetime.timedelta(seconds=1),
2800
frozenset((token_end, )))
2162
frozenset((token_end,)))
2801
2163
token_minute = Token(re.compile(r"(\d+)M"),
2802
2164
datetime.timedelta(minutes=1),
2803
2165
frozenset((token_second, token_end)))
3135
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3137
2494
except OSError as error:
3138
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3139
.format(uid, gid, os.strerror(error.errno)))
3140
2495
if error.errno != errno.EPERM:
3144
2499
# Enable all possible GnuTLS debugging
3146
2501
# "Use a log level over 10 to enable all debugging options."
3147
2502
# - GnuTLS manual
3148
gnutls.global_set_log_level(11)
2503
gnutls.library.functions.gnutls_global_set_log_level(11)
2505
@gnutls.library.types.gnutls_log_func
3151
2506
def debug_gnutls(level, string):
3152
2507
logger.debug("GnuTLS: %s", string[:-1])
3154
gnutls.global_set_log_function(debug_gnutls)
2509
(gnutls.library.functions
2510
.gnutls_global_set_log_function(debug_gnutls))
3156
2512
# Redirect stdin so all checkers get /dev/null
3157
2513
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
3158
2514
os.dup2(null, sys.stdin.fileno())
3162
2518
# Need to fork before connecting to D-Bus
3163
2519
if not foreground:
3164
2520
# Close all input and output, do double fork, etc.
3167
if gi.version_info < (3, 10, 2):
3168
# multiprocessing will use threads, so before we use GLib we
3169
# 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()
3172
2527
global main_loop
3173
2528
# From the Avahi example code
3174
2529
DBusGMainLoop(set_as_default=True)
3175
main_loop = GLib.MainLoop()
2530
main_loop = gobject.MainLoop()
3176
2531
bus = dbus.SystemBus()
3177
2532
# End of Avahi example code
3180
2535
bus_name = dbus.service.BusName("se.recompile.Mandos",
3183
old_bus_name = dbus.service.BusName(
3184
"se.bsnet.fukt.Mandos", bus,
3186
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:
3187
2541
logger.error("Disabling D-Bus:", exc_info=e)
3188
2542
use_dbus = False
3189
2543
server_settings["use_dbus"] = False
3190
2544
tcp_server.use_dbus = False
3192
2546
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3193
service = AvahiServiceToSyslog(
3194
name=server_settings["servicename"],
3195
servicetype="_mandos._tcp",
2547
service = AvahiServiceToSyslog(name =
2548
server_settings["servicename"],
2549
servicetype = "_mandos._tcp",
2550
protocol = protocol, bus = bus)
3198
2551
if server_settings["interface"]:
3199
service.interface = if_nametoindex(
3200
server_settings["interface"].encode("utf-8"))
2552
service.interface = (if_nametoindex
2553
(server_settings["interface"]
3202
2556
global multiprocessing_manager
3203
2557
multiprocessing_manager = multiprocessing.Manager()
3205
2559
client_class = Client
3207
client_class = functools.partial(ClientDBus, bus=bus)
2561
client_class = functools.partial(ClientDBus, bus = bus)
3209
2563
client_settings = Client.config_parser(client_config)
3210
2564
old_client_settings = {}
3211
2565
clients_data = {}
3213
2567
# This is used to redirect stdout and stderr for checker processes
3215
wnull = open(os.devnull, "w") # A writable /dev/null
2569
wnull = open(os.devnull, "w") # A writable /dev/null
3216
2570
# Only used if server is running in foreground but not in debug
3218
2572
if debug or not foreground:
3221
2575
# Get client data and settings from last running state.
3222
2576
if server_settings["restore"]:
3224
2578
with open(stored_state_path, "rb") as stored_state:
3225
if sys.version_info.major == 2:
3226
clients_data, old_client_settings = pickle.load(
3229
bytes_clients_data, bytes_old_client_settings = (
3230
pickle.load(stored_state, encoding="bytes"))
3231
# Fix bytes to strings
3234
clients_data = {(key.decode("utf-8")
3235
if isinstance(key, bytes)
3238
bytes_clients_data.items()}
3239
del bytes_clients_data
3240
for key in clients_data:
3241
value = {(k.decode("utf-8")
3242
if isinstance(k, bytes) else k): v
3244
clients_data[key].items()}
3245
clients_data[key] = value
3247
value["client_structure"] = [
3249
if isinstance(s, bytes)
3251
value["client_structure"]]
3252
# .name, .host, and .checker_command
3253
for k in ("name", "host", "checker_command"):
3254
if isinstance(value[k], bytes):
3255
value[k] = value[k].decode("utf-8")
3256
if "key_id" not in value:
3257
value["key_id"] = ""
3258
elif "fingerprint" not in value:
3259
value["fingerprint"] = ""
3260
# old_client_settings
3262
old_client_settings = {
3263
(key.decode("utf-8")
3264
if isinstance(key, bytes)
3267
bytes_old_client_settings.items()}
3268
del bytes_old_client_settings
3269
# .host and .checker_command
3270
for value in old_client_settings.values():
3271
for attribute in ("host", "checker_command"):
3272
if isinstance(value[attribute], bytes):
3273
value[attribute] = (value[attribute]
2579
clients_data, old_client_settings = (pickle.load
3275
2581
os.remove(stored_state_path)
3276
2582
except IOError as e:
3277
2583
if e.errno == errno.ENOENT:
3278
logger.warning("Could not load persistent state:"
3279
" {}".format(os.strerror(e.errno)))
2584
logger.warning("Could not load persistent state: {}"
2585
.format(os.strerror(e.errno)))
3281
2587
logger.critical("Could not load persistent state:",
3284
2590
except EOFError as e:
3285
2591
logger.warning("Could not load persistent state: "
2592
"EOFError:", exc_info=e)
3289
2594
with PGPEngine() as pgp:
3290
2595
for client_name, client in clients_data.items():
3291
2596
# Skip removed clients
3292
2597
if client_name not in client_settings:
3295
2600
# Decide which value to use after restoring saved state.
3296
2601
# We have three different values: Old config file,
3297
2602
# new config file, and saved state.
3355
2660
for client_name in (set(client_settings)
3356
2661
- set(old_client_settings)):
3357
2662
clients_data[client_name] = client_settings[client_name]
3359
2664
# Create all client objects
3360
2665
for client_name, client in clients_data.items():
3361
2666
tcp_server.clients[client_name] = client_class(
3364
server_settings=server_settings)
2667
name = client_name, settings = client,
2668
server_settings = server_settings)
3366
2670
if not tcp_server.clients:
3367
2671
logger.warning("No clients defined")
3369
2673
if not foreground:
3370
2674
if pidfile is not None:
3374
print(pid, file=pidfile)
2678
pidfile.write("{}\n".format(pid).encode("utf-8"))
3375
2679
except IOError:
3376
2680
logger.error("Could not write to file %r with PID %d",
3377
2681
pidfilename, pid)
3379
2683
del pidfilename
3381
for termsig in (signal.SIGHUP, signal.SIGTERM):
3382
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3383
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())
3387
@alternate_dbus_interfaces(
3388
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3389
class MandosDBusService(DBusObjectWithObjectManager):
2689
@alternate_dbus_interfaces({"se.recompile.Mandos":
2690
"se.bsnet.fukt.Mandos"})
2691
class MandosDBusService(DBusObjectWithProperties):
3390
2692
"""A D-Bus proxy object"""
3392
2693
def __init__(self):
3393
2694
dbus.service.Object.__init__(self, bus, "/")
3395
2695
_interface = "se.recompile.Mandos"
2697
@dbus_interface_annotations(_interface)
2699
return { "org.freedesktop.DBus.Property"
2700
".EmitsChangedSignal":
3397
2703
@dbus.service.signal(_interface, signature="o")
3398
2704
def ClientAdded(self, objpath):
3402
2708
@dbus.service.signal(_interface, signature="ss")
3403
def ClientNotFound(self, key_id, address):
2709
def ClientNotFound(self, fingerprint, address):
3407
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3409
2713
@dbus.service.signal(_interface, signature="os")
3410
2714
def ClientRemoved(self, objpath, name):
3414
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3416
2718
@dbus.service.method(_interface, out_signature="ao")
3417
2719
def GetAllClients(self):
3419
return dbus.Array(c.dbus_object_path for c in
3420
tcp_server.clients.values())
3422
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2721
return dbus.Array(c.dbus_object_path
2723
tcp_server.clients.itervalues())
3424
2725
@dbus.service.method(_interface,
3425
2726
out_signature="a{oa{sv}}")
3426
2727
def GetAllClientsWithProperties(self):
3428
2729
return dbus.Dictionary(
3429
{c.dbus_object_path: c.GetAll(
3430
"se.recompile.Mandos.Client")
3431
for c in tcp_server.clients.values()},
2730
{ c.dbus_object_path: c.GetAll("")
2731
for c in tcp_server.clients.itervalues() },
3432
2732
signature="oa{sv}")
3434
2734
@dbus.service.method(_interface, in_signature="o")
3435
2735
def RemoveClient(self, object_path):
3437
for c in tcp_server.clients.values():
2737
for c in tcp_server.clients.itervalues():
3438
2738
if c.dbus_object_path == object_path:
3439
2739
del tcp_server.clients[c.name]
3440
2740
c.remove_from_connection()
3441
# Don't signal the disabling
2741
# Don't signal anything except ClientRemoved
3442
2742
c.disable(quiet=True)
3443
# Emit D-Bus signal for removal
3444
self.client_removed_signal(c)
2744
self.ClientRemoved(object_path, c.name)
3446
2746
raise KeyError(object_path)
3450
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3451
out_signature="a{oa{sa{sv}}}")
3452
def GetManagedObjects(self):
3454
return dbus.Dictionary(
3455
{client.dbus_object_path:
3457
{interface: client.GetAll(interface)
3459
client._get_all_interface_names()})
3460
for client in tcp_server.clients.values()})
3462
def client_added_signal(self, client):
3463
"""Send the new standard signal and the old signal"""
3465
# New standard signal
3466
self.InterfacesAdded(
3467
client.dbus_object_path,
3469
{interface: client.GetAll(interface)
3471
client._get_all_interface_names()}))
3473
self.ClientAdded(client.dbus_object_path)
3475
def client_removed_signal(self, client):
3476
"""Send the new standard signal and the old signal"""
3478
# New standard signal
3479
self.InterfacesRemoved(
3480
client.dbus_object_path,
3481
client._get_all_interface_names())
3483
self.ClientRemoved(client.dbus_object_path,
3486
2750
mandos_dbus_service = MandosDBusService()
3488
# Save modules to variables to exempt the modules from being
3489
# unloaded before the function registered with atexit() is run.
3490
mp = multiprocessing
3494
2753
"Cleanup function; run on exit"
3496
2755
service.cleanup()
3498
mp.active_children()
2757
multiprocessing.active_children()
3500
2759
if not (tcp_server.clients or client_settings):
3503
2762
# Store client before exiting. Secrets are encrypted with key
3504
2763
# based on what config file has. If config file is
3505
2764
# removed/edited, old secret will thus be unrecovable.
3507
2766
with PGPEngine() as pgp:
3508
for client in tcp_server.clients.values():
2767
for client in tcp_server.clients.itervalues():
3509
2768
key = client_settings[client.name]["secret"]
3510
2769
client.encrypted_secret = pgp.encrypt(client.secret,
3512
2771
client_dict = {}
3514
2773
# A list of attributes that can not be pickled
3516
exclude = {"bus", "changedstate", "secret",
3517
"checker", "server_settings"}
3518
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)):
3520
2779
exclude.add(name)
3522
2781
client_dict["encrypted_secret"] = (client
3523
2782
.encrypted_secret)
3524
2783
for attr in client.client_structure:
3525
2784
if attr not in exclude:
3526
2785
client_dict[attr] = getattr(client, attr)
3528
2787
clients[client.name] = client_dict
3529
2788
del client_settings[client.name]["secret"]
3532
with tempfile.NamedTemporaryFile(
3536
dir=os.path.dirname(stored_state_path),
3537
delete=False) as stored_state:
3538
pickle.dump((clients, client_settings), stored_state,
3540
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
3541
2797
os.rename(tempname, stored_state_path)
3542
2798
except (IOError, OSError) as e: