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# -*- mode: python; coding: utf-8 -*-
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# Mandos server - give out binary blobs to connecting clients.
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# This program is partly derived from an example program for an Avahi
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# 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 © 2008-2018 Teddy Hogeborn
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# Copyright © 2008-2018 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
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (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
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# 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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import cPickle as pickle
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import cPickle as pickle
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import multiprocessing
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import dbus.service
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from gi.repository import GLib
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from dbus.mainloop.glib import DBusGMainLoop
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import xml.dom.minidom
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# Try to find the value of SO_BINDTODEVICE:
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# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
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# newer, and it is also the most natural place for it:
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SO_BINDTODEVICE = socket.SO_BINDTODEVICE
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except AttributeError:
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# This is where SO_BINDTODEVICE was up to and including Python
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from IN import SO_BINDTODEVICE
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except ImportError:
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# In Python 2.7 it seems to have been removed entirely.
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# Try running the C preprocessor:
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cc = subprocess.Popen(["cc", "--language=c", "-E",
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE)
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stdout = cc.communicate(
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"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
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SO_BINDTODEVICE = int(stdout.splitlines()[-1])
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except (OSError, ValueError, IndexError):
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SO_BINDTODEVICE = None
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if sys.version_info.major == 2:
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SO_BINDTODEVICE = None
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stored_state_file = "clients.pickle"
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logger = logging.getLogger()
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if_nametoindex = ctypes.cdll.LoadLibrary(
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ctypes.util.find_library("c")).if_nametoindex
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if_nametoindex = (ctypes.cdll.LoadLibrary
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(ctypes.util.find_library("c"))
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except (OSError, AttributeError):
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def if_nametoindex(interface):
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"Get an interface index the hard way, i.e. using fcntl()"
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SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
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with contextlib.closing(socket.socket()) as s:
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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
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struct.pack(b"16s16x", interface))
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interface_index = struct.unpack("I", ifreq[16:20])[0]
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struct.pack(str("16s16x"),
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interface_index = struct.unpack(str("I"),
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return interface_index
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def copy_function(func):
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"""Make a copy of a function"""
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if sys.version_info.major == 2:
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return types.FunctionType(func.func_code,
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return types.FunctionType(func.__code__,
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def initlogger(debug, level=logging.WARNING):
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"""init logger and add loglevel"""
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syslogger = (logging.handlers.SysLogHandler(
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facility=logging.handlers.SysLogHandler.LOG_DAEMON,
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syslogger = (logging.handlers.SysLogHandler
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logging.handlers.SysLogHandler.LOG_DAEMON,
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address = str("/dev/log")))
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syslogger.setFormatter(logging.Formatter
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('Mandos [%(process)d]: %(levelname)s:'
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logger.addHandler(syslogger)
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console = logging.StreamHandler()
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console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
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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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It is instantiated once, and simulates having an Avahi module."""
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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(self, t):
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return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
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for s in t), signature="ay")
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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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super(AvahiError, self).__init__(value, *args, **kwargs)
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def __unicode__(self):
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return unicode(repr(self.value))
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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"""
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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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class GnuTLS(object):
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"""This isn't so much a class as it is a module-like namespace.
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It is instantiated once, and simulates having a GnuTLS module."""
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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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_need_version = b"3.3.0"
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_tls_rawpk_version = b"3.6.6"
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# Need to use "self" here, since this method is called before
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# the assignment to the "gnutls" global variable happens.
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if self.check_version(self._need_version) is None:
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raise self.Error("Needs GnuTLS {} or later"
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.format(self._need_version))
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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
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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):
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_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
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('size', ctypes.c_uint)]
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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
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class Error(Exception):
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# We need to use the class name "GnuTLS" here, since this
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# exception might be raised from within GnuTLS.__init__,
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# which is called before the assignment to the "gnutls"
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# global variable has happened.
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def __init__(self, message=None, code=None, args=()):
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# Default usage is by a message string, but if a return
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# code is passed, convert it to a string with
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if message is None and code is not None:
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message = GnuTLS.strerror(code)
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return super(GnuTLS.Error, self).__init__(
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class CertificateSecurityError(Error):
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class Credentials(object):
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self._c_object = gnutls.certificate_credentials_t()
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gnutls.certificate_allocate_credentials(
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ctypes.byref(self._c_object))
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self.type = gnutls.CRD_CERTIFICATE
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gnutls.certificate_free_credentials(self._c_object)
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class ClientSession(object):
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def __init__(self, socket, credentials=None):
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self._c_object = gnutls.session_t()
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gnutls_flags = gnutls.CLIENT
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if gnutls.check_version("3.5.6"):
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gnutls_flags |= gnutls.NO_TICKETS
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gnutls_flags |= gnutls.ENABLE_RAWPK
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gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
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gnutls.set_default_priority(self._c_object)
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gnutls.transport_set_ptr(self._c_object, socket.fileno())
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gnutls.handshake_set_private_extensions(self._c_object,
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if credentials is None:
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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)
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return gnutls.handshake(self._c_object)
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def send(self, data):
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data_len -= gnutls.record_send(self._c_object,
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return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
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# Error handling functions
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def _error_code(result):
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"""A function to raise exceptions on errors, suitable
642
for the 'restype' attribute on ctypes functions"""
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if result == gnutls.E_NO_CERTIFICATE_FOUND:
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raise gnutls.CertificateSecurityError(code=result)
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raise gnutls.Error(code=result)
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def _retry_on_error(result, func, arguments):
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"""A function to retry on some errors, suitable
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for the 'errcheck' attribute on ctypes functions"""
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if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
654
return _error_code(result)
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result = func(*arguments)
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# Unless otherwise indicated, the function declarations below are
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# all from the gnutls/gnutls.h C header file.
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priority_set_direct = _library.gnutls_priority_set_direct
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priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
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ctypes.POINTER(ctypes.c_char_p)]
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priority_set_direct.restype = _error_code
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init = _library.gnutls_init
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init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
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init.restype = _error_code
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set_default_priority = _library.gnutls_set_default_priority
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set_default_priority.argtypes = [session_t]
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set_default_priority.restype = _error_code
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record_send = _library.gnutls_record_send
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record_send.argtypes = [session_t, ctypes.c_void_p,
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record_send.restype = ctypes.c_ssize_t
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record_send.errcheck = _retry_on_error
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certificate_allocate_credentials = (
682
_library.gnutls_certificate_allocate_credentials)
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certificate_allocate_credentials.argtypes = [
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ctypes.POINTER(certificate_credentials_t)]
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certificate_allocate_credentials.restype = _error_code
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certificate_free_credentials = (
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_library.gnutls_certificate_free_credentials)
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certificate_free_credentials.argtypes = [
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certificate_credentials_t]
691
certificate_free_credentials.restype = None
693
handshake_set_private_extensions = (
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_library.gnutls_handshake_set_private_extensions)
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handshake_set_private_extensions.argtypes = [session_t,
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handshake_set_private_extensions.restype = None
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credentials_set = _library.gnutls_credentials_set
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credentials_set.argtypes = [session_t, credentials_type_t,
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credentials_set.restype = _error_code
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strerror = _library.gnutls_strerror
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strerror.argtypes = [ctypes.c_int]
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strerror.restype = ctypes.c_char_p
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certificate_type_get = _library.gnutls_certificate_type_get
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certificate_type_get.argtypes = [session_t]
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certificate_type_get.restype = _error_code
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certificate_get_peers = _library.gnutls_certificate_get_peers
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certificate_get_peers.argtypes = [session_t,
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ctypes.POINTER(ctypes.c_uint)]
715
certificate_get_peers.restype = ctypes.POINTER(datum_t)
717
global_set_log_level = _library.gnutls_global_set_log_level
718
global_set_log_level.argtypes = [ctypes.c_int]
719
global_set_log_level.restype = None
721
global_set_log_function = _library.gnutls_global_set_log_function
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global_set_log_function.argtypes = [log_func]
723
global_set_log_function.restype = None
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deinit = _library.gnutls_deinit
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deinit.argtypes = [session_t]
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deinit.restype = None
729
handshake = _library.gnutls_handshake
730
handshake.argtypes = [session_t]
731
handshake.restype = _error_code
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handshake.errcheck = _retry_on_error
734
transport_set_ptr = _library.gnutls_transport_set_ptr
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transport_set_ptr.argtypes = [session_t, transport_ptr_t]
736
transport_set_ptr.restype = None
738
bye = _library.gnutls_bye
739
bye.argtypes = [session_t, close_request_t]
740
bye.restype = _error_code
741
bye.errcheck = _retry_on_error
743
check_version = _library.gnutls_check_version
744
check_version.argtypes = [ctypes.c_char_p]
745
check_version.restype = ctypes.c_char_p
747
has_rawpk = bool(check_version(_tls_rawpk_version))
751
class pubkey_st(ctypes.Structure):
753
pubkey_t = ctypes.POINTER(pubkey_st)
755
x509_crt_fmt_t = ctypes.c_int
757
# All the function declarations below are from gnutls/abstract.h
758
pubkey_init = _library.gnutls_pubkey_init
759
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
760
pubkey_init.restype = _error_code
762
pubkey_import = _library.gnutls_pubkey_import
763
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
765
pubkey_import.restype = _error_code
767
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
768
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
769
ctypes.POINTER(ctypes.c_ubyte),
770
ctypes.POINTER(ctypes.c_size_t)]
771
pubkey_get_key_id.restype = _error_code
773
pubkey_deinit = _library.gnutls_pubkey_deinit
774
pubkey_deinit.argtypes = [pubkey_t]
775
pubkey_deinit.restype = None
777
# All the function declarations below are from gnutls/openpgp.h
779
openpgp_crt_init = _library.gnutls_openpgp_crt_init
780
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
781
openpgp_crt_init.restype = _error_code
783
openpgp_crt_import = _library.gnutls_openpgp_crt_import
784
openpgp_crt_import.argtypes = [openpgp_crt_t,
785
ctypes.POINTER(datum_t),
787
openpgp_crt_import.restype = _error_code
789
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
790
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
791
ctypes.POINTER(ctypes.c_uint)]
792
openpgp_crt_verify_self.restype = _error_code
794
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
795
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
796
openpgp_crt_deinit.restype = None
798
openpgp_crt_get_fingerprint = (
799
_library.gnutls_openpgp_crt_get_fingerprint)
800
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
804
openpgp_crt_get_fingerprint.restype = _error_code
806
if check_version("3.6.4"):
807
certificate_type_get2 = _library.gnutls_certificate_type_get2
808
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
809
certificate_type_get2.restype = _error_code
811
# Remove non-public functions
812
del _error_code, _retry_on_error
813
# Create the global "gnutls" object, simulating a module
817
def call_pipe(connection, # : multiprocessing.Connection
818
func, *args, **kwargs):
819
"""This function is meant to be called by multiprocessing.Process
821
This function runs func(*args, **kwargs), and writes the resulting
822
return value on the provided multiprocessing.Connection.
824
connection.send(func(*args, **kwargs))
828
404
class Client(object):
829
405
"""A representation of a client host served by this server.
832
408
approved: bool(); 'None' if not yet approved/disapproved
833
409
approval_delay: datetime.timedelta(); Time to wait for approval
1013
582
logger.info("Disabling client %s", self.name)
1014
583
if getattr(self, "disable_initiator_tag", None) is not None:
1015
GLib.source_remove(self.disable_initiator_tag)
584
gobject.source_remove(self.disable_initiator_tag)
1016
585
self.disable_initiator_tag = None
1017
586
self.expires = None
1018
587
if getattr(self, "checker_initiator_tag", None) is not None:
1019
GLib.source_remove(self.checker_initiator_tag)
588
gobject.source_remove(self.checker_initiator_tag)
1020
589
self.checker_initiator_tag = None
1021
590
self.stop_checker()
1022
591
self.enabled = False
1024
593
self.send_changedstate()
1025
# 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
1028
597
def __del__(self):
1031
600
def init_checker(self):
1032
601
# Schedule a new checker to be started an 'interval' from now,
1033
602
# and every interval from then on.
1034
603
if self.checker_initiator_tag is not None:
1035
GLib.source_remove(self.checker_initiator_tag)
1036
self.checker_initiator_tag = GLib.timeout_add(
1037
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),
1039
609
# Schedule a disable() when 'timeout' has passed
1040
610
if self.disable_initiator_tag is not None:
1041
GLib.source_remove(self.disable_initiator_tag)
1042
self.disable_initiator_tag = GLib.timeout_add(
1043
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),
1044
616
# Also start a new checker *right now*.
1045
617
self.start_checker()
1047
def checker_callback(self, source, condition, connection,
619
def checker_callback(self, pid, condition, command):
1049
620
"""The checker has completed, so take appropriate actions."""
1050
621
self.checker_callback_tag = None
1051
622
self.checker = None
1052
# Read return code from connection (see call_pipe)
1053
returncode = connection.recv()
1057
self.last_checker_status = returncode
1058
self.last_checker_signal = None
623
if os.WIFEXITED(condition):
624
self.last_checker_status = os.WEXITSTATUS(condition)
1059
625
if self.last_checker_status == 0:
1060
626
logger.info("Checker for %(name)s succeeded",
1062
628
self.checked_ok()
1064
logger.info("Checker for %(name)s failed", vars(self))
630
logger.info("Checker for %(name)s failed",
1066
633
self.last_checker_status = -1
1067
self.last_checker_signal = -returncode
1068
634
logger.warning("Checker for %(name)s crashed?",
1072
637
def checked_ok(self):
1073
638
"""Assert that the client has been seen, alive and well."""
1074
639
self.last_checked_ok = datetime.datetime.utcnow()
1075
640
self.last_checker_status = 0
1076
self.last_checker_signal = None
1077
641
self.bump_timeout()
1079
643
def bump_timeout(self, timeout=None):
1080
644
"""Bump up the timeout for this client."""
1081
645
if timeout is None:
1082
646
timeout = self.timeout
1083
647
if self.disable_initiator_tag is not None:
1084
GLib.source_remove(self.disable_initiator_tag)
648
gobject.source_remove(self.disable_initiator_tag)
1085
649
self.disable_initiator_tag = None
1086
650
if getattr(self, "enabled", False):
1087
self.disable_initiator_tag = GLib.timeout_add(
1088
int(timeout.total_seconds() * 1000), self.disable)
651
self.disable_initiator_tag = (gobject.timeout_add
652
(int(timeout.total_seconds()
653
* 1000), self.disable))
1089
654
self.expires = datetime.datetime.utcnow() + timeout
1091
656
def need_approval(self):
1092
657
self.last_approval_request = datetime.datetime.utcnow()
1094
659
def start_checker(self):
1095
660
"""Start a new checker subprocess if one is not running.
1097
662
If a checker already exists, leave it running and do
1099
664
# The reason for not killing a running checker is that if we
1104
669
# checkers alone, the checker would have to take more time
1105
670
# than 'timeout' for the client to be disabled, which is as it
1108
if self.checker is not None and not self.checker.is_alive():
1109
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)
1112
687
# Start a new checker if needed
1113
688
if self.checker is None:
1114
689
# Escape attributes for the shell
1116
attr: re.escape(str(getattr(self, attr)))
1117
for attr in self.runtime_expansions}
690
escaped_attrs = { attr:
691
re.escape(unicode(getattr(self,
693
for attr in self.runtime_expansions }
1119
695
command = self.checker_command % escaped_attrs
1120
696
except TypeError as error:
1121
697
logger.error('Could not format string "%s"',
1122
self.checker_command,
698
self.checker_command, exc_info=error)
699
return True # Try again later
700
self.current_checker_command = command
702
logger.info("Starting checker %r for %s",
704
# We don't need to redirect stdout and stderr, since
705
# in normal mode, that is already done by daemon(),
706
# and in debug mode we don't want to. (Stdin is
707
# always replaced by /dev/null.)
708
# The exception is when not debugging but nevertheless
709
# running in the foreground; use the previously
712
if (not self.server_settings["debug"]
713
and self.server_settings["foreground"]):
714
popen_args.update({"stdout": wnull,
716
self.checker = subprocess.Popen(command,
720
except OSError as error:
721
logger.error("Failed to start subprocess",
1124
return True # Try again later
1125
self.current_checker_command = command
1126
logger.info("Starting checker %r for %s", command,
1128
# We don't need to redirect stdout and stderr, since
1129
# in normal mode, that is already done by daemon(),
1130
# and in debug mode we don't want to. (Stdin is
1131
# always replaced by /dev/null.)
1132
# The exception is when not debugging but nevertheless
1133
# running in the foreground; use the previously
1135
popen_args = {"close_fds": True,
1138
if (not self.server_settings["debug"]
1139
and self.server_settings["foreground"]):
1140
popen_args.update({"stdout": wnull,
1142
pipe = multiprocessing.Pipe(duplex=False)
1143
self.checker = multiprocessing.Process(
1145
args=(pipe[1], subprocess.call, command),
1147
self.checker.start()
1148
self.checker_callback_tag = GLib.io_add_watch(
1149
pipe[0].fileno(), GLib.IO_IN,
1150
self.checker_callback, pipe[0], command)
1151
# Re-run this periodically if run by GLib.timeout_add
724
self.checker_callback_tag = (gobject.child_watch_add
726
self.checker_callback,
728
# The checker may have completed before the gobject
729
# watch was added. Check for this.
731
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
732
except OSError as error:
733
if error.errno == errno.ECHILD:
734
# This should never happen
735
logger.error("Child process vanished",
740
gobject.source_remove(self.checker_callback_tag)
741
self.checker_callback(pid, status, command)
742
# Re-run this periodically if run by gobject.timeout_add
1154
745
def stop_checker(self):
1155
746
"""Force the checker process, if any, to stop."""
1156
747
if self.checker_callback_tag:
1157
GLib.source_remove(self.checker_callback_tag)
748
gobject.source_remove(self.checker_callback_tag)
1158
749
self.checker_callback_tag = None
1159
750
if getattr(self, "checker", None) is None:
1161
752
logger.debug("Stopping checker for %(name)s", vars(self))
1162
self.checker.terminate()
754
self.checker.terminate()
756
#if self.checker.poll() is None:
757
# self.checker.kill()
758
except OSError as error:
759
if error.errno != errno.ESRCH: # No such process
1163
761
self.checker = None
1166
def dbus_service_property(dbus_interface,
764
def dbus_service_property(dbus_interface, signature="v",
765
access="readwrite", byte_arrays=False):
1170
766
"""Decorators for marking methods of a DBusObjectWithProperties to
1171
767
become properties on the D-Bus.
1173
769
The decorated method will be called with no arguments by "Get"
1174
770
and with one argument by "Set".
1176
772
The parameters, where they are supported, are the same as
1177
773
dbus.service.method, except there is only "signature", since the
1178
774
type from Get() and the type sent to Set() is the same.
1261
class DBusObjectWithAnnotations(dbus.service.Object):
1262
"""A D-Bus object with annotations.
1264
Classes inheriting from this can use the dbus_annotations
1265
decorator to add annotations to methods or signals.
850
class DBusObjectWithProperties(dbus.service.Object):
851
"""A D-Bus object with properties.
853
Classes inheriting from this can use the dbus_service_property
854
decorator to expose methods as D-Bus properties. It exposes the
855
standard Get(), Set(), and GetAll() methods on the D-Bus.
1269
859
def _is_dbus_thing(thing):
1270
860
"""Returns a function testing if an attribute is a D-Bus thing
1272
862
If called like _is_dbus_thing("method") it returns a function
1273
863
suitable for use as predicate to inspect.getmembers().
1275
865
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1278
868
def _get_all_dbus_things(self, thing):
1279
869
"""Returns a generator of (name, attribute) pairs
1281
return ((getattr(athing.__get__(self), "_dbus_name", name),
871
return ((getattr(athing.__get__(self), "_dbus_name",
1282
873
athing.__get__(self))
1283
874
for cls in self.__class__.__mro__
1284
875
for name, athing in
1285
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1287
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1289
path_keyword='object_path',
1290
connection_keyword='connection')
1291
def Introspect(self, object_path, connection):
1292
"""Overloading of standard D-Bus method.
1294
Inserts annotation tags on methods and signals.
1296
xmlstring = dbus.service.Object.Introspect(self, object_path,
1299
document = xml.dom.minidom.parseString(xmlstring)
1301
for if_tag in document.getElementsByTagName("interface"):
1302
# Add annotation tags
1303
for typ in ("method", "signal"):
1304
for tag in if_tag.getElementsByTagName(typ):
1306
for name, prop in (self.
1307
_get_all_dbus_things(typ)):
1308
if (name == tag.getAttribute("name")
1309
and prop._dbus_interface
1310
== if_tag.getAttribute("name")):
1311
annots.update(getattr(
1312
prop, "_dbus_annotations", {}))
1313
for name, value in annots.items():
1314
ann_tag = document.createElement(
1316
ann_tag.setAttribute("name", name)
1317
ann_tag.setAttribute("value", value)
1318
tag.appendChild(ann_tag)
1319
# Add interface annotation tags
1320
for annotation, value in dict(
1321
itertools.chain.from_iterable(
1322
annotations().items()
1323
for name, annotations
1324
in self._get_all_dbus_things("interface")
1325
if name == if_tag.getAttribute("name")
1327
ann_tag = document.createElement("annotation")
1328
ann_tag.setAttribute("name", annotation)
1329
ann_tag.setAttribute("value", value)
1330
if_tag.appendChild(ann_tag)
1331
# Fix argument name for the Introspect method itself
1332
if (if_tag.getAttribute("name")
1333
== dbus.INTROSPECTABLE_IFACE):
1334
for cn in if_tag.getElementsByTagName("method"):
1335
if cn.getAttribute("name") == "Introspect":
1336
for arg in cn.getElementsByTagName("arg"):
1337
if (arg.getAttribute("direction")
1339
arg.setAttribute("name",
1341
xmlstring = document.toxml("utf-8")
1343
except (AttributeError, xml.dom.DOMException,
1344
xml.parsers.expat.ExpatError) as error:
1345
logger.error("Failed to override Introspection method",
1350
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1351
"""A D-Bus object with properties.
1353
Classes inheriting from this can use the dbus_service_property
1354
decorator to expose methods as D-Bus properties. It exposes the
1355
standard Get(), Set(), and GetAll() methods on the D-Bus.
876
inspect.getmembers(cls,
877
self._is_dbus_thing(thing)))
1358
879
def _get_dbus_property(self, interface_name, property_name):
1359
880
"""Returns a bound method if one exists which is a D-Bus
1360
881
property with the specified name and interface.
1362
for cls in self.__class__.__mro__:
1363
for name, value in inspect.getmembers(
1364
cls, self._is_dbus_thing("property")):
883
for cls in self.__class__.__mro__:
884
for name, value in (inspect.getmembers
886
self._is_dbus_thing("property"))):
1365
887
if (value._dbus_name == property_name
1366
888
and value._dbus_interface == interface_name):
1367
889
return value.__get__(self)
1369
891
# No such property
1370
raise DBusPropertyNotFound("{}:{}.{}".format(
1371
self.dbus_object_path, interface_name, property_name))
1374
def _get_all_interface_names(cls):
1375
"""Get a sequence of all interfaces supported by an object"""
1376
return (name for name in set(getattr(getattr(x, attr),
1377
"_dbus_interface", None)
1378
for x in (inspect.getmro(cls))
1380
if name is not None)
1382
@dbus.service.method(dbus.PROPERTIES_IFACE,
892
raise DBusPropertyNotFound(self.dbus_object_path + ":"
893
+ interface_name + "."
896
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1384
897
out_signature="v")
1385
898
def Get(self, interface_name, property_name):
1386
899
"""Standard D-Bus property Get() method, see D-Bus standard.
1515
1031
return xmlstring
1519
dbus.OBJECT_MANAGER_IFACE
1520
except AttributeError:
1521
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1524
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1525
"""A D-Bus object with an ObjectManager.
1527
Classes inheriting from this exposes the standard
1528
GetManagedObjects call and the InterfacesAdded and
1529
InterfacesRemoved signals on the standard
1530
"org.freedesktop.DBus.ObjectManager" interface.
1532
Note: No signals are sent automatically; they must be sent
1535
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1536
out_signature="a{oa{sa{sv}}}")
1537
def GetManagedObjects(self):
1538
"""This function must be overridden"""
1539
raise NotImplementedError()
1541
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1542
signature="oa{sa{sv}}")
1543
def InterfacesAdded(self, object_path, interfaces_and_properties):
1546
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1547
def InterfacesRemoved(self, object_path, interfaces):
1550
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1552
path_keyword='object_path',
1553
connection_keyword='connection')
1554
def Introspect(self, object_path, connection):
1555
"""Overloading of standard D-Bus method.
1557
Override return argument name of GetManagedObjects to be
1558
"objpath_interfaces_and_properties"
1560
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1564
document = xml.dom.minidom.parseString(xmlstring)
1566
for if_tag in document.getElementsByTagName("interface"):
1567
# Fix argument name for the GetManagedObjects method
1568
if (if_tag.getAttribute("name")
1569
== dbus.OBJECT_MANAGER_IFACE):
1570
for cn in if_tag.getElementsByTagName("method"):
1571
if (cn.getAttribute("name")
1572
== "GetManagedObjects"):
1573
for arg in cn.getElementsByTagName("arg"):
1574
if (arg.getAttribute("direction")
1578
"objpath_interfaces"
1580
xmlstring = document.toxml("utf-8")
1582
except (AttributeError, xml.dom.DOMException,
1583
xml.parsers.expat.ExpatError) as error:
1584
logger.error("Failed to override Introspection method",
1589
1034
def datetime_to_dbus(dt, variant_level=0):
1590
1035
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1592
return dbus.String("", variant_level=variant_level)
1593
return dbus.String(dt.isoformat(), variant_level=variant_level)
1037
return dbus.String("", variant_level = variant_level)
1038
return dbus.String(dt.isoformat(),
1039
variant_level=variant_level)
1596
1042
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1627
1072
# Ignore non-D-Bus attributes, and D-Bus attributes
1628
1073
# with the wrong interface name
1629
1074
if (not hasattr(attribute, "_dbus_interface")
1630
or not attribute._dbus_interface.startswith(
1631
orig_interface_name)):
1075
or not attribute._dbus_interface
1076
.startswith(orig_interface_name)):
1633
1078
# Create an alternate D-Bus interface name based on
1634
1079
# the current name
1635
alt_interface = attribute._dbus_interface.replace(
1636
orig_interface_name, alt_interface_name)
1080
alt_interface = (attribute._dbus_interface
1081
.replace(orig_interface_name,
1082
alt_interface_name))
1637
1083
interface_names.add(alt_interface)
1638
1084
# Is this a D-Bus signal?
1639
1085
if getattr(attribute, "_dbus_is_signal", False):
1640
1086
# Extract the original non-method undecorated
1641
1087
# function by black magic
1642
if sys.version_info.major == 2:
1643
nonmethod_func = (dict(
1088
nonmethod_func = (dict(
1644
1089
zip(attribute.func_code.co_freevars,
1645
attribute.__closure__))
1646
["func"].cell_contents)
1648
nonmethod_func = (dict(
1649
zip(attribute.__code__.co_freevars,
1650
attribute.__closure__))
1651
["func"].cell_contents)
1090
attribute.__closure__))["func"]
1652
1092
# Create a new, but exactly alike, function
1653
1093
# object, and decorate it to be a new D-Bus signal
1654
1094
# with the alternate D-Bus interface name
1655
new_function = copy_function(nonmethod_func)
1656
new_function = (dbus.service.signal(
1658
attribute._dbus_signature)(new_function))
1095
new_function = (dbus.service.signal
1097
attribute._dbus_signature)
1098
(types.FunctionType(
1099
nonmethod_func.func_code,
1100
nonmethod_func.func_globals,
1101
nonmethod_func.func_name,
1102
nonmethod_func.func_defaults,
1103
nonmethod_func.func_closure)))
1659
1104
# Copy annotations, if any
1661
new_function._dbus_annotations = dict(
1662
attribute._dbus_annotations)
1106
new_function._dbus_annotations = (
1107
dict(attribute._dbus_annotations))
1663
1108
except AttributeError:
1666
1110
# Define a creator of a function to call both the
1667
1111
# original and alternate functions, so both the
1668
1112
# original and alternate signals gets sent when
1957
1392
server to mandos-client
1961
1396
# Rejected - signal
1962
1397
@dbus.service.signal(_interface, signature="s")
1963
1398
def Rejected(self, reason):
1967
1402
# NeedApproval - signal
1968
1403
@dbus.service.signal(_interface, signature="tb")
1969
1404
def NeedApproval(self, timeout, default):
1971
1406
return self.need_approval()
1975
1410
# Approve - method
1976
1411
@dbus.service.method(_interface, in_signature="b")
1977
1412
def Approve(self, value):
1978
1413
self.approve(value)
1980
1415
# CheckedOK - method
1981
1416
@dbus.service.method(_interface)
1982
1417
def CheckedOK(self):
1983
1418
self.checked_ok()
1985
1420
# Enable - method
1986
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1987
1421
@dbus.service.method(_interface)
1988
1422
def Enable(self):
1992
1426
# StartChecker - method
1993
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1994
1427
@dbus.service.method(_interface)
1995
1428
def StartChecker(self):
1997
1430
self.start_checker()
1999
1432
# Disable - method
2000
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2001
1433
@dbus.service.method(_interface)
2002
1434
def Disable(self):
2006
1438
# StopChecker - method
2007
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2008
1439
@dbus.service.method(_interface)
2009
1440
def StopChecker(self):
2010
1441
self.stop_checker()
2014
1445
# ApprovalPending - property
2015
1446
@dbus_service_property(_interface, signature="b", access="read")
2016
1447
def ApprovalPending_dbus_property(self):
2017
1448
return dbus.Boolean(bool(self.approvals_pending))
2019
1450
# ApprovedByDefault - property
2020
@dbus_service_property(_interface,
1451
@dbus_service_property(_interface, signature="b",
2022
1452
access="readwrite")
2023
1453
def ApprovedByDefault_dbus_property(self, value=None):
2024
1454
if value is None: # get
2025
1455
return dbus.Boolean(self.approved_by_default)
2026
1456
self.approved_by_default = bool(value)
2028
1458
# ApprovalDelay - property
2029
@dbus_service_property(_interface,
1459
@dbus_service_property(_interface, signature="t",
2031
1460
access="readwrite")
2032
1461
def ApprovalDelay_dbus_property(self, value=None):
2033
1462
if value is None: # get
2034
1463
return dbus.UInt64(self.approval_delay.total_seconds()
2036
1465
self.approval_delay = datetime.timedelta(0, 0, 0, value)
2038
1467
# ApprovalDuration - property
2039
@dbus_service_property(_interface,
1468
@dbus_service_property(_interface, signature="t",
2041
1469
access="readwrite")
2042
1470
def ApprovalDuration_dbus_property(self, value=None):
2043
1471
if value is None: # get
2044
1472
return dbus.UInt64(self.approval_duration.total_seconds()
2046
1474
self.approval_duration = datetime.timedelta(0, 0, 0, value)
2048
1476
# Name - property
2050
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2051
1477
@dbus_service_property(_interface, signature="s", access="read")
2052
1478
def Name_dbus_property(self):
2053
1479
return dbus.String(self.name)
2057
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2058
@dbus_service_property(_interface, signature="s", access="read")
2059
def KeyID_dbus_property(self):
2060
return dbus.String(self.key_id)
2062
1481
# Fingerprint - property
2064
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2065
1482
@dbus_service_property(_interface, signature="s", access="read")
2066
1483
def Fingerprint_dbus_property(self):
2067
1484
return dbus.String(self.fingerprint)
2069
1486
# Host - property
2070
@dbus_service_property(_interface,
1487
@dbus_service_property(_interface, signature="s",
2072
1488
access="readwrite")
2073
1489
def Host_dbus_property(self, value=None):
2074
1490
if value is None: # get
2075
1491
return dbus.String(self.host)
2076
self.host = str(value)
1492
self.host = unicode(value)
2078
1494
# Created - property
2080
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2081
1495
@dbus_service_property(_interface, signature="s", access="read")
2082
1496
def Created_dbus_property(self):
2083
1497
return datetime_to_dbus(self.created)
2085
1499
# LastEnabled - property
2086
1500
@dbus_service_property(_interface, signature="s", access="read")
2087
1501
def LastEnabled_dbus_property(self):
2088
1502
return datetime_to_dbus(self.last_enabled)
2090
1504
# Enabled - property
2091
@dbus_service_property(_interface,
1505
@dbus_service_property(_interface, signature="b",
2093
1506
access="readwrite")
2094
1507
def Enabled_dbus_property(self, value=None):
2095
1508
if value is None: # get
2377
1773
delay -= time2 - time
2380
session.send(client.secret)
2381
except gnutls.Error as error:
2382
logger.warning("gnutls send failed",
1776
while sent_size < len(client.secret):
1778
sent = session.send(client.secret[sent_size:])
1779
except gnutls.errors.GNUTLSError as error:
1780
logger.warning("gnutls send failed",
1783
logger.debug("Sent: %d, remaining: %d",
1784
sent, len(client.secret)
1785
- (sent_size + sent))
2386
1788
logger.info("Sending secret to %s", client.name)
2387
1789
# bump the timeout using extended_timeout
2388
1790
client.bump_timeout(client.extended_timeout)
2389
1791
if self.server.use_dbus:
2390
1792
# Emit D-Bus signal
2391
1793
client.GotSecret()
2394
1796
if approval_required:
2395
1797
client.approvals_pending -= 1
2398
except gnutls.Error as error:
1800
except gnutls.errors.GNUTLSError as error:
2399
1801
logger.warning("GnuTLS bye failed",
2400
1802
exc_info=error)
2403
1805
def peer_certificate(session):
2404
"Return the peer's certificate as a bytestring"
2406
cert_type = gnutls.certificate_type_get2(session._c_object,
2408
except AttributeError:
2409
cert_type = gnutls.certificate_type_get(session._c_object)
2410
if gnutls.has_rawpk:
2411
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2413
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2414
# If not a valid certificate type...
2415
if cert_type not in valid_cert_types:
2416
logger.info("Cert type %r not in %r", cert_type,
2418
# ...return invalid data
1806
"Return the peer's OpenPGP certificate as a bytestring"
1807
# If not an OpenPGP certificate...
1808
if (gnutls.library.functions
1809
.gnutls_certificate_type_get(session._c_object)
1810
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1811
# ...do the normal thing
1812
return session.peer_certificate
2420
1813
list_size = ctypes.c_uint(1)
2421
cert_list = (gnutls.certificate_get_peers
1814
cert_list = (gnutls.library.functions
1815
.gnutls_certificate_get_peers
2422
1816
(session._c_object, ctypes.byref(list_size)))
2423
1817
if not bool(cert_list) and list_size.value != 0:
2424
raise gnutls.Error("error getting peer certificate")
1818
raise gnutls.errors.GNUTLSError("error getting peer"
2425
1820
if list_size.value == 0:
2427
1822
cert = cert_list[0]
2428
1823
return ctypes.string_at(cert.data, cert.size)
2431
def key_id(certificate):
2432
"Convert a certificate bytestring to a hexdigit key ID"
2433
# New GnuTLS "datum" with the public key
2434
datum = gnutls.datum_t(
2435
ctypes.cast(ctypes.c_char_p(certificate),
2436
ctypes.POINTER(ctypes.c_ubyte)),
2437
ctypes.c_uint(len(certificate)))
2438
# XXX all these need to be created in the gnutls "module"
2439
# New empty GnuTLS certificate
2440
pubkey = gnutls.pubkey_t()
2441
gnutls.pubkey_init(ctypes.byref(pubkey))
2442
# Import the raw public key into the certificate
2443
gnutls.pubkey_import(pubkey,
2444
ctypes.byref(datum),
2445
gnutls.X509_FMT_DER)
2446
# New buffer for the key ID
2447
buf = ctypes.create_string_buffer(32)
2448
buf_len = ctypes.c_size_t(len(buf))
2449
# Get the key ID from the raw public key into the buffer
2450
gnutls.pubkey_get_key_id(pubkey,
2451
gnutls.KEYID_USE_SHA256,
2452
ctypes.cast(ctypes.byref(buf),
2453
ctypes.POINTER(ctypes.c_ubyte)),
2454
ctypes.byref(buf_len))
2455
# Deinit the certificate
2456
gnutls.pubkey_deinit(pubkey)
2458
# Convert the buffer to a Python bytestring
2459
key_id = ctypes.string_at(buf, buf_len.value)
2460
# Convert the bytestring to hexadecimal notation
2461
hex_key_id = binascii.hexlify(key_id).upper()
2465
1826
def fingerprint(openpgp):
2466
1827
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2467
1828
# New GnuTLS "datum" with the OpenPGP public key
2468
datum = gnutls.datum_t(
2469
ctypes.cast(ctypes.c_char_p(openpgp),
2470
ctypes.POINTER(ctypes.c_ubyte)),
2471
ctypes.c_uint(len(openpgp)))
1829
datum = (gnutls.library.types
1830
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1833
ctypes.c_uint(len(openpgp))))
2472
1834
# New empty GnuTLS certificate
2473
crt = gnutls.openpgp_crt_t()
2474
gnutls.openpgp_crt_init(ctypes.byref(crt))
1835
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1836
(gnutls.library.functions
1837
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2475
1838
# Import the OpenPGP public key into the certificate
2476
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2477
gnutls.OPENPGP_FMT_RAW)
1839
(gnutls.library.functions
1840
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1841
gnutls.library.constants
1842
.GNUTLS_OPENPGP_FMT_RAW))
2478
1843
# Verify the self signature in the key
2479
1844
crtverify = ctypes.c_uint()
2480
gnutls.openpgp_crt_verify_self(crt, 0,
2481
ctypes.byref(crtverify))
1845
(gnutls.library.functions
1846
.gnutls_openpgp_crt_verify_self(crt, 0,
1847
ctypes.byref(crtverify)))
2482
1848
if crtverify.value != 0:
2483
gnutls.openpgp_crt_deinit(crt)
2484
raise gnutls.CertificateSecurityError(code
1849
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1850
raise (gnutls.errors.CertificateSecurityError
2486
1852
# New buffer for the fingerprint
2487
1853
buf = ctypes.create_string_buffer(20)
2488
1854
buf_len = ctypes.c_size_t()
2489
1855
# Get the fingerprint from the certificate into the buffer
2490
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2491
ctypes.byref(buf_len))
1856
(gnutls.library.functions
1857
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1858
ctypes.byref(buf_len)))
2492
1859
# Deinit the certificate
2493
gnutls.openpgp_crt_deinit(crt)
1860
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2494
1861
# Convert the buffer to a Python bytestring
2495
1862
fpr = ctypes.string_at(buf, buf_len.value)
2496
1863
# Convert the bytestring to hexadecimal notation
2585
1946
# socket_wrapper(), if socketfd was set.
2586
1947
socketserver.TCPServer.__init__(self, server_address,
2587
1948
RequestHandlerClass)
2589
1950
def server_bind(self):
2590
1951
"""This overrides the normal server_bind() function
2591
1952
to bind to an interface if one was specified, and also NOT to
2592
1953
bind to an address or port if they were not specified."""
2593
global SO_BINDTODEVICE
2594
1954
if self.interface is not None:
2595
1955
if SO_BINDTODEVICE is None:
2596
# Fall back to a hard-coded value which seems to be
2598
logger.warning("SO_BINDTODEVICE not found, trying 25")
2599
SO_BINDTODEVICE = 25
2601
self.socket.setsockopt(
2602
socket.SOL_SOCKET, SO_BINDTODEVICE,
2603
(self.interface + "\0").encode("utf-8"))
2604
except socket.error as error:
2605
if error.errno == errno.EPERM:
2606
logger.error("No permission to bind to"
2607
" interface %s", self.interface)
2608
elif error.errno == errno.ENOPROTOOPT:
2609
logger.error("SO_BINDTODEVICE not available;"
2610
" cannot bind to interface %s",
2612
elif error.errno == errno.ENODEV:
2613
logger.error("Interface %s does not exist,"
2614
" cannot bind", self.interface)
1956
logger.error("SO_BINDTODEVICE does not exist;"
1957
" cannot bind to interface %s",
1961
self.socket.setsockopt(socket.SOL_SOCKET,
1963
str(self.interface + '\0'))
1964
except socket.error as error:
1965
if error.errno == errno.EPERM:
1966
logger.error("No permission to bind to"
1967
" interface %s", self.interface)
1968
elif error.errno == errno.ENOPROTOOPT:
1969
logger.error("SO_BINDTODEVICE not available;"
1970
" cannot bind to interface %s",
1972
elif error.errno == errno.ENODEV:
1973
logger.error("Interface %s does not exist,"
1974
" cannot bind", self.interface)
2617
1977
# Only bind(2) the socket if we really need to.
2618
1978
if self.server_address[0] or self.server_address[1]:
2619
1979
if not self.server_address[0]:
2620
1980
if self.address_family == socket.AF_INET6:
2621
any_address = "::" # in6addr_any
1981
any_address = "::" # in6addr_any
2623
any_address = "0.0.0.0" # INADDR_ANY
1983
any_address = "0.0.0.0" # INADDR_ANY
2624
1984
self.server_address = (any_address,
2625
1985
self.server_address[1])
2626
1986
elif not self.server_address[1]:
2627
self.server_address = (self.server_address[0], 0)
1987
self.server_address = (self.server_address[0],
2628
1989
# if self.interface:
2629
1990
# self.server_address = (self.server_address[0],
2660
2016
self.gnutls_priority = gnutls_priority
2661
2017
IPv6_TCPServer.__init__(self, server_address,
2662
2018
RequestHandlerClass,
2663
interface=interface,
2019
interface = interface,
2020
use_ipv6 = use_ipv6,
2021
socketfd = socketfd)
2667
2022
def server_activate(self):
2668
2023
if self.enabled:
2669
2024
return socketserver.TCPServer.server_activate(self)
2671
2026
def enable(self):
2672
2027
self.enabled = True
2674
2029
def add_pipe(self, parent_pipe, proc):
2675
2030
# Call "handle_ipc" for both data and EOF events
2677
parent_pipe.fileno(),
2678
GLib.IO_IN | GLib.IO_HUP,
2679
functools.partial(self.handle_ipc,
2680
parent_pipe=parent_pipe,
2683
def handle_ipc(self, source, condition,
2686
client_object=None):
2031
gobject.io_add_watch(parent_pipe.fileno(),
2032
gobject.IO_IN | gobject.IO_HUP,
2033
functools.partial(self.handle_ipc,
2038
def handle_ipc(self, source, condition, parent_pipe=None,
2039
proc = None, client_object=None):
2687
2040
# error, or the other end of multiprocessing.Pipe has closed
2688
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2041
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2689
2042
# Wait for other process to exit
2693
2046
# Read a request from the child
2694
2047
request = parent_pipe.recv()
2695
2048
command = request[0]
2697
2050
if command == 'init':
2698
key_id = request[1].decode("ascii")
2699
fpr = request[2].decode("ascii")
2700
address = request[3]
2702
for c in self.clients.values():
2703
if key_id and c.key_id == key_id:
2706
if fpr and c.fingerprint == fpr:
2052
address = request[2]
2054
for c in self.clients.itervalues():
2055
if c.fingerprint == fpr:
2710
logger.info("Client not found for key ID: %s, address"
2711
": %s", key_id or fpr, address)
2059
logger.info("Client not found for fingerprint: %s, ad"
2060
"dress: %s", fpr, address)
2712
2061
if self.use_dbus:
2713
2062
# Emit D-Bus signal
2714
mandos_dbus_service.ClientNotFound(key_id or fpr,
2063
mandos_dbus_service.ClientNotFound(fpr,
2716
2065
parent_pipe.send(False)
2720
parent_pipe.fileno(),
2721
GLib.IO_IN | GLib.IO_HUP,
2722
functools.partial(self.handle_ipc,
2723
parent_pipe=parent_pipe,
2725
client_object=client))
2068
gobject.io_add_watch(parent_pipe.fileno(),
2069
gobject.IO_IN | gobject.IO_HUP,
2070
functools.partial(self.handle_ipc,
2726
2076
parent_pipe.send(True)
2727
2077
# remove the old hook in favor of the new above hook on
3134
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3136
2477
except OSError as error:
3137
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3138
.format(uid, gid, os.strerror(error.errno)))
3139
2478
if error.errno != errno.EPERM:
3143
2482
# Enable all possible GnuTLS debugging
3145
2484
# "Use a log level over 10 to enable all debugging options."
3146
2485
# - GnuTLS manual
3147
gnutls.global_set_log_level(11)
2486
gnutls.library.functions.gnutls_global_set_log_level(11)
2488
@gnutls.library.types.gnutls_log_func
3150
2489
def debug_gnutls(level, string):
3151
2490
logger.debug("GnuTLS: %s", string[:-1])
3153
gnutls.global_set_log_function(debug_gnutls)
2492
(gnutls.library.functions
2493
.gnutls_global_set_log_function(debug_gnutls))
3155
2495
# Redirect stdin so all checkers get /dev/null
3156
2496
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
3157
2497
os.dup2(null, sys.stdin.fileno())
3161
2501
# Need to fork before connecting to D-Bus
3162
2502
if not foreground:
3163
2503
# Close all input and output, do double fork, etc.
3166
# multiprocessing will use threads, so before we use GLib we need
3167
# to inform GLib that threads will be used.
2506
# multiprocessing will use threads, so before we use gobject we
2507
# need to inform gobject that threads will be used.
2508
gobject.threads_init()
3170
2510
global main_loop
3171
2511
# From the Avahi example code
3172
2512
DBusGMainLoop(set_as_default=True)
3173
main_loop = GLib.MainLoop()
2513
main_loop = gobject.MainLoop()
3174
2514
bus = dbus.SystemBus()
3175
2515
# End of Avahi example code
3178
2518
bus_name = dbus.service.BusName("se.recompile.Mandos",
3181
old_bus_name = dbus.service.BusName(
3182
"se.bsnet.fukt.Mandos", bus,
3184
except dbus.exceptions.DBusException as e:
2519
bus, do_not_queue=True)
2520
old_bus_name = (dbus.service.BusName
2521
("se.bsnet.fukt.Mandos", bus,
2523
except dbus.exceptions.NameExistsException as e:
3185
2524
logger.error("Disabling D-Bus:", exc_info=e)
3186
2525
use_dbus = False
3187
2526
server_settings["use_dbus"] = False
3188
2527
tcp_server.use_dbus = False
3190
2529
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3191
service = AvahiServiceToSyslog(
3192
name=server_settings["servicename"],
3193
servicetype="_mandos._tcp",
2530
service = AvahiServiceToSyslog(name =
2531
server_settings["servicename"],
2532
servicetype = "_mandos._tcp",
2533
protocol = protocol, bus = bus)
3196
2534
if server_settings["interface"]:
3197
service.interface = if_nametoindex(
3198
server_settings["interface"].encode("utf-8"))
2535
service.interface = (if_nametoindex
2536
(str(server_settings["interface"])))
3200
2538
global multiprocessing_manager
3201
2539
multiprocessing_manager = multiprocessing.Manager()
3203
2541
client_class = Client
3205
client_class = functools.partial(ClientDBus, bus=bus)
2543
client_class = functools.partial(ClientDBus, bus = bus)
3207
2545
client_settings = Client.config_parser(client_config)
3208
2546
old_client_settings = {}
3209
2547
clients_data = {}
3211
2549
# This is used to redirect stdout and stderr for checker processes
3213
wnull = open(os.devnull, "w") # A writable /dev/null
2551
wnull = open(os.devnull, "w") # A writable /dev/null
3214
2552
# Only used if server is running in foreground but not in debug
3216
2554
if debug or not foreground:
3219
2557
# Get client data and settings from last running state.
3220
2558
if server_settings["restore"]:
3222
2560
with open(stored_state_path, "rb") as stored_state:
3223
if sys.version_info.major == 2:
3224
clients_data, old_client_settings = pickle.load(
3227
bytes_clients_data, bytes_old_client_settings = (
3228
pickle.load(stored_state, encoding="bytes"))
3229
# Fix bytes to strings
3232
clients_data = {(key.decode("utf-8")
3233
if isinstance(key, bytes)
3236
bytes_clients_data.items()}
3237
del bytes_clients_data
3238
for key in clients_data:
3239
value = {(k.decode("utf-8")
3240
if isinstance(k, bytes) else k): v
3242
clients_data[key].items()}
3243
clients_data[key] = value
3245
value["client_structure"] = [
3247
if isinstance(s, bytes)
3249
value["client_structure"]]
3251
for k in ("name", "host"):
3252
if isinstance(value[k], bytes):
3253
value[k] = value[k].decode("utf-8")
3254
if not value.has_key("key_id"):
3255
value["key_id"] = ""
3256
elif not value.has_key("fingerprint"):
3257
value["fingerprint"] = ""
3258
# old_client_settings
3260
old_client_settings = {
3261
(key.decode("utf-8")
3262
if isinstance(key, bytes)
3265
bytes_old_client_settings.items()}
3266
del bytes_old_client_settings
3268
for value in old_client_settings.values():
3269
if isinstance(value["host"], bytes):
3270
value["host"] = (value["host"]
2561
clients_data, old_client_settings = (pickle.load
3272
2563
os.remove(stored_state_path)
3273
2564
except IOError as e:
3274
2565
if e.errno == errno.ENOENT:
3275
logger.warning("Could not load persistent state:"
3276
" {}".format(os.strerror(e.errno)))
2566
logger.warning("Could not load persistent state: {}"
2567
.format(os.strerror(e.errno)))
3278
2569
logger.critical("Could not load persistent state:",
3281
2572
except EOFError as e:
3282
2573
logger.warning("Could not load persistent state: "
2574
"EOFError:", exc_info=e)
3286
2576
with PGPEngine() as pgp:
3287
2577
for client_name, client in clients_data.items():
3288
2578
# Skip removed clients
3289
2579
if client_name not in client_settings:
3292
2582
# Decide which value to use after restoring saved state.
3293
2583
# We have three different values: Old config file,
3294
2584
# new config file, and saved state.
3352
2642
for client_name in (set(client_settings)
3353
2643
- set(old_client_settings)):
3354
2644
clients_data[client_name] = client_settings[client_name]
3356
2646
# Create all client objects
3357
2647
for client_name, client in clients_data.items():
3358
2648
tcp_server.clients[client_name] = client_class(
3361
server_settings=server_settings)
2649
name = client_name, settings = client,
2650
server_settings = server_settings)
3363
2652
if not tcp_server.clients:
3364
2653
logger.warning("No clients defined")
3366
2655
if not foreground:
3367
2656
if pidfile is not None:
3371
print(pid, file=pidfile)
2660
pidfile.write(str(pid) + "\n".encode("utf-8"))
3372
2661
except IOError:
3373
2662
logger.error("Could not write to file %r with PID %d",
3374
2663
pidfilename, pid)
3376
2665
del pidfilename
3378
for termsig in (signal.SIGHUP, signal.SIGTERM):
3379
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3380
lambda: main_loop.quit() and False)
2667
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2668
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3384
@alternate_dbus_interfaces(
3385
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3386
class MandosDBusService(DBusObjectWithObjectManager):
2671
@alternate_dbus_interfaces({"se.recompile.Mandos":
2672
"se.bsnet.fukt.Mandos"})
2673
class MandosDBusService(DBusObjectWithProperties):
3387
2674
"""A D-Bus proxy object"""
3389
2675
def __init__(self):
3390
2676
dbus.service.Object.__init__(self, bus, "/")
3392
2677
_interface = "se.recompile.Mandos"
2679
@dbus_interface_annotations(_interface)
2681
return { "org.freedesktop.DBus.Property"
2682
".EmitsChangedSignal":
3394
2685
@dbus.service.signal(_interface, signature="o")
3395
2686
def ClientAdded(self, objpath):
3399
2690
@dbus.service.signal(_interface, signature="ss")
3400
def ClientNotFound(self, key_id, address):
2691
def ClientNotFound(self, fingerprint, address):
3404
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3406
2695
@dbus.service.signal(_interface, signature="os")
3407
2696
def ClientRemoved(self, objpath, name):
3411
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3413
2700
@dbus.service.method(_interface, out_signature="ao")
3414
2701
def GetAllClients(self):
3416
return dbus.Array(c.dbus_object_path for c in
3417
tcp_server.clients.values())
3419
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2703
return dbus.Array(c.dbus_object_path
2705
tcp_server.clients.itervalues())
3421
2707
@dbus.service.method(_interface,
3422
2708
out_signature="a{oa{sv}}")
3423
2709
def GetAllClientsWithProperties(self):
3425
2711
return dbus.Dictionary(
3426
{c.dbus_object_path: c.GetAll(
3427
"se.recompile.Mandos.Client")
3428
for c in tcp_server.clients.values()},
2712
((c.dbus_object_path, c.GetAll(""))
2713
for c in tcp_server.clients.itervalues()),
3429
2714
signature="oa{sv}")
3431
2716
@dbus.service.method(_interface, in_signature="o")
3432
2717
def RemoveClient(self, object_path):
3434
for c in tcp_server.clients.values():
2719
for c in tcp_server.clients.itervalues():
3435
2720
if c.dbus_object_path == object_path:
3436
2721
del tcp_server.clients[c.name]
3437
2722
c.remove_from_connection()
3438
# Don't signal the disabling
2723
# Don't signal anything except ClientRemoved
3439
2724
c.disable(quiet=True)
3440
# Emit D-Bus signal for removal
3441
self.client_removed_signal(c)
2726
self.ClientRemoved(object_path, c.name)
3443
2728
raise KeyError(object_path)
3447
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3448
out_signature="a{oa{sa{sv}}}")
3449
def GetManagedObjects(self):
3451
return dbus.Dictionary(
3452
{client.dbus_object_path:
3454
{interface: client.GetAll(interface)
3456
client._get_all_interface_names()})
3457
for client in tcp_server.clients.values()})
3459
def client_added_signal(self, client):
3460
"""Send the new standard signal and the old signal"""
3462
# New standard signal
3463
self.InterfacesAdded(
3464
client.dbus_object_path,
3466
{interface: client.GetAll(interface)
3468
client._get_all_interface_names()}))
3470
self.ClientAdded(client.dbus_object_path)
3472
def client_removed_signal(self, client):
3473
"""Send the new standard signal and the old signal"""
3475
# New standard signal
3476
self.InterfacesRemoved(
3477
client.dbus_object_path,
3478
client._get_all_interface_names())
3480
self.ClientRemoved(client.dbus_object_path,
3483
2732
mandos_dbus_service = MandosDBusService()
3485
# Save modules to variables to exempt the modules from being
3486
# unloaded before the function registered with atexit() is run.
3487
mp = multiprocessing
3491
2735
"Cleanup function; run on exit"
3493
2737
service.cleanup()
3495
mp.active_children()
2739
multiprocessing.active_children()
3497
2741
if not (tcp_server.clients or client_settings):
3500
2744
# Store client before exiting. Secrets are encrypted with key
3501
2745
# based on what config file has. If config file is
3502
2746
# removed/edited, old secret will thus be unrecovable.
3504
2748
with PGPEngine() as pgp:
3505
for client in tcp_server.clients.values():
2749
for client in tcp_server.clients.itervalues():
3506
2750
key = client_settings[client.name]["secret"]
3507
2751
client.encrypted_secret = pgp.encrypt(client.secret,
3509
2753
client_dict = {}
3511
2755
# A list of attributes that can not be pickled
3513
exclude = {"bus", "changedstate", "secret",
3514
"checker", "server_settings"}
3515
for name, typ in inspect.getmembers(dbus.service
2757
exclude = { "bus", "changedstate", "secret",
2758
"checker", "server_settings" }
2759
for name, typ in (inspect.getmembers
2760
(dbus.service.Object)):
3517
2761
exclude.add(name)
3519
2763
client_dict["encrypted_secret"] = (client
3520
2764
.encrypted_secret)
3521
2765
for attr in client.client_structure:
3522
2766
if attr not in exclude:
3523
2767
client_dict[attr] = getattr(client, attr)
3525
2769
clients[client.name] = client_dict
3526
2770
del client_settings[client.name]["secret"]
3529
with tempfile.NamedTemporaryFile(
3533
dir=os.path.dirname(stored_state_path),
3534
delete=False) as stored_state:
3535
pickle.dump((clients, client_settings), stored_state,
3537
tempname = stored_state.name
2773
with (tempfile.NamedTemporaryFile
2774
(mode='wb', suffix=".pickle", prefix='clients-',
2775
dir=os.path.dirname(stored_state_path),
2776
delete=False)) as stored_state:
2777
pickle.dump((clients, client_settings), stored_state)
2778
tempname=stored_state.name
3538
2779
os.rename(tempname, stored_state_path)
3539
2780
except (IOError, OSError) as e: