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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 © 2008-2019 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 © 2008-2012 Teddy Hogeborn
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# Copyright © 2008-2012 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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syslogger = (logging.handlers.SysLogHandler
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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = str("/dev/log")))
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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.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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os.rmdir(self.tempdir)
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self.tempdir = None
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def password_encode(self, password):
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# Passphrase can not be empty and can not contain newlines or
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# NUL bytes. So we prefix it and hex encode it.
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encoded = b"mandos" + binascii.hexlify(password)
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if len(encoded) > 2048:
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# GnuPG can't handle long passwords, so encode differently
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encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
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.replace(b"\n", b"\\n")
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.replace(b"\0", b"\\x00"))
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return b"mandos" + binascii.hexlify(password)
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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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passfile.write(passphrase)
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proc = subprocess.Popen([self.gpg, '--symmetric',
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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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self.gnupg.passphrase = self.password_encode(password)
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with open(os.devnull, "w") as devnull:
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proc = self.gnupg.run(['--symmetric'],
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create_fhs=['stdin', 'stdout'],
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attach_fhs={'stderr': devnull})
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with contextlib.closing(proc.handles['stdin']) as f:
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with contextlib.closing(proc.handles['stdout']) as f:
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ciphertext = f.read()
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self.gnupg.passphrase = None
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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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passfile.write(passphrase)
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proc = subprocess.Popen([self.gpg, '--decrypt',
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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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if proc.returncode != 0:
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self.gnupg.passphrase = self.password_encode(password)
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with open(os.devnull, "w") as devnull:
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proc = self.gnupg.run(['--decrypt'],
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create_fhs=['stdin', 'stdout'],
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attach_fhs={'stderr': devnull})
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with contextlib.closing(proc.handles['stdin']) as f:
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with contextlib.closing(proc.handles['stdout']) as f:
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decrypted_plaintext = f.read()
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self.gnupg.passphrase = None
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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"))
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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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name: string; Example: 'Mandos'
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type: string; Example: '_mandos._tcp'.
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See <https://www.iana.org/assignments/service-names-port-numbers>
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See <http://www.dns-sd.org/ServiceTypes.html>
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port: integer; what port to announce
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TXT: list of strings; TXT record for the service
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domain: string; Domain to publish on, default to .local if empty.
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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 ({0}) [%(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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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
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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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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
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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):
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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 = (
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_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]
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certificate_free_credentials.restype = None
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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)]
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certificate_get_peers.restype = ctypes.POINTER(datum_t)
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global_set_log_level = _library.gnutls_global_set_log_level
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global_set_log_level.argtypes = [ctypes.c_int]
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global_set_log_level.restype = None
706
global_set_log_function = _library.gnutls_global_set_log_function
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global_set_log_function.argtypes = [log_func]
708
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
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handshake = _library.gnutls_handshake
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handshake.argtypes = [session_t]
716
handshake.restype = _error_code
717
handshake.errcheck = _retry_on_error
719
transport_set_ptr = _library.gnutls_transport_set_ptr
720
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
721
transport_set_ptr.restype = None
723
bye = _library.gnutls_bye
724
bye.argtypes = [session_t, close_request_t]
725
bye.restype = _error_code
726
bye.errcheck = _retry_on_error
728
check_version = _library.gnutls_check_version
729
check_version.argtypes = [ctypes.c_char_p]
730
check_version.restype = ctypes.c_char_p
732
_need_version = b"3.3.0"
733
if check_version(_need_version) is None:
734
raise self.Error("Needs GnuTLS {} or later"
735
.format(_need_version))
737
_tls_rawpk_version = b"3.6.6"
738
has_rawpk = bool(check_version(_tls_rawpk_version))
742
class pubkey_st(ctypes.Structure):
744
pubkey_t = ctypes.POINTER(pubkey_st)
746
x509_crt_fmt_t = ctypes.c_int
748
# All the function declarations below are from gnutls/abstract.h
749
pubkey_init = _library.gnutls_pubkey_init
750
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
751
pubkey_init.restype = _error_code
753
pubkey_import = _library.gnutls_pubkey_import
754
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
756
pubkey_import.restype = _error_code
758
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
759
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
760
ctypes.POINTER(ctypes.c_ubyte),
761
ctypes.POINTER(ctypes.c_size_t)]
762
pubkey_get_key_id.restype = _error_code
764
pubkey_deinit = _library.gnutls_pubkey_deinit
765
pubkey_deinit.argtypes = [pubkey_t]
766
pubkey_deinit.restype = None
768
# All the function declarations below are from gnutls/openpgp.h
770
openpgp_crt_init = _library.gnutls_openpgp_crt_init
771
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
772
openpgp_crt_init.restype = _error_code
774
openpgp_crt_import = _library.gnutls_openpgp_crt_import
775
openpgp_crt_import.argtypes = [openpgp_crt_t,
776
ctypes.POINTER(datum_t),
778
openpgp_crt_import.restype = _error_code
780
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
781
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
782
ctypes.POINTER(ctypes.c_uint)]
783
openpgp_crt_verify_self.restype = _error_code
785
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
786
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
787
openpgp_crt_deinit.restype = None
789
openpgp_crt_get_fingerprint = (
790
_library.gnutls_openpgp_crt_get_fingerprint)
791
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
795
openpgp_crt_get_fingerprint.restype = _error_code
797
if check_version("3.6.4"):
798
certificate_type_get2 = _library.gnutls_certificate_type_get2
799
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
800
certificate_type_get2.restype = _error_code
802
# Remove non-public functions
803
del _error_code, _retry_on_error
806
def call_pipe(connection, # : multiprocessing.Connection
807
func, *args, **kwargs):
808
"""This function is meant to be called by multiprocessing.Process
810
This function runs func(*args, **kwargs), and writes the resulting
811
return value on the provided multiprocessing.Connection.
813
connection.send(func(*args, **kwargs))
392
def timedelta_to_milliseconds(td):
393
"Convert a datetime.timedelta() to milliseconds"
394
return ((td.days * 24 * 60 * 60 * 1000)
395
+ (td.seconds * 1000)
396
+ (td.microseconds // 1000))
817
398
class Client(object):
818
399
"""A representation of a client host served by this server.
821
402
approved: bool(); 'None' if not yet approved/disapproved
822
403
approval_delay: datetime.timedelta(); Time to wait for approval
859
436
runtime_expansions: Allowed attributes for runtime expansion.
860
437
expires: datetime.datetime(); time (UTC) when a client will be
861
438
disabled, or None
862
server_settings: The server_settings dict from main()
865
441
runtime_expansions = ("approval_delay", "approval_duration",
866
"created", "enabled", "expires", "key_id",
867
"fingerprint", "host", "interval",
868
"last_approval_request", "last_checked_ok",
442
"created", "enabled", "fingerprint",
443
"host", "interval", "last_checked_ok",
869
444
"last_enabled", "name", "timeout")
872
"extended_timeout": "PT15M",
874
"checker": "fping -q -- %%(host)s",
876
"approval_delay": "PT0S",
877
"approval_duration": "PT1S",
878
"approved_by_default": "True",
445
client_defaults = { "timeout": "5m",
446
"extended_timeout": "15m",
448
"checker": "fping -q -- %%(host)s",
450
"approval_delay": "0s",
451
"approval_duration": "1s",
452
"approved_by_default": "True",
456
def timeout_milliseconds(self):
457
"Return the 'timeout' attribute in milliseconds"
458
return timedelta_to_milliseconds(self.timeout)
460
def extended_timeout_milliseconds(self):
461
"Return the 'extended_timeout' attribute in milliseconds"
462
return timedelta_to_milliseconds(self.extended_timeout)
464
def interval_milliseconds(self):
465
"Return the 'interval' attribute in milliseconds"
466
return timedelta_to_milliseconds(self.interval)
468
def approval_delay_milliseconds(self):
469
return timedelta_to_milliseconds(self.approval_delay)
883
472
def config_parser(config):
884
473
"""Construct a new dict of client settings of this form:
1002
586
logger.info("Disabling client %s", self.name)
1003
587
if getattr(self, "disable_initiator_tag", None) is not None:
1004
GLib.source_remove(self.disable_initiator_tag)
588
gobject.source_remove(self.disable_initiator_tag)
1005
589
self.disable_initiator_tag = None
1006
590
self.expires = None
1007
591
if getattr(self, "checker_initiator_tag", None) is not None:
1008
GLib.source_remove(self.checker_initiator_tag)
592
gobject.source_remove(self.checker_initiator_tag)
1009
593
self.checker_initiator_tag = None
1010
594
self.stop_checker()
1011
595
self.enabled = False
1013
597
self.send_changedstate()
1014
# Do not run this again if called by a GLib.timeout_add
598
# Do not run this again if called by a gobject.timeout_add
1017
601
def __del__(self):
1020
604
def init_checker(self):
1021
605
# Schedule a new checker to be started an 'interval' from now,
1022
606
# and every interval from then on.
1023
607
if self.checker_initiator_tag is not None:
1024
GLib.source_remove(self.checker_initiator_tag)
1025
self.checker_initiator_tag = GLib.timeout_add(
1026
int(self.interval.total_seconds() * 1000),
608
gobject.source_remove(self.checker_initiator_tag)
609
self.checker_initiator_tag = (gobject.timeout_add
610
(self.interval_milliseconds(),
1028
612
# Schedule a disable() when 'timeout' has passed
1029
613
if self.disable_initiator_tag is not None:
1030
GLib.source_remove(self.disable_initiator_tag)
1031
self.disable_initiator_tag = GLib.timeout_add(
1032
int(self.timeout.total_seconds() * 1000), self.disable)
614
gobject.source_remove(self.disable_initiator_tag)
615
self.disable_initiator_tag = (gobject.timeout_add
616
(self.timeout_milliseconds(),
1033
618
# Also start a new checker *right now*.
1034
619
self.start_checker()
1036
def checker_callback(self, source, condition, connection,
621
def checker_callback(self, pid, condition, command):
1038
622
"""The checker has completed, so take appropriate actions."""
1039
623
self.checker_callback_tag = None
1040
624
self.checker = None
1041
# Read return code from connection (see call_pipe)
1042
returncode = connection.recv()
1046
self.last_checker_status = returncode
1047
self.last_checker_signal = None
625
if os.WIFEXITED(condition):
626
self.last_checker_status = os.WEXITSTATUS(condition)
1048
627
if self.last_checker_status == 0:
1049
628
logger.info("Checker for %(name)s succeeded",
1051
630
self.checked_ok()
1053
logger.info("Checker for %(name)s failed", vars(self))
632
logger.info("Checker for %(name)s failed",
1055
635
self.last_checker_status = -1
1056
self.last_checker_signal = -returncode
1057
636
logger.warning("Checker for %(name)s crashed?",
1061
639
def checked_ok(self):
1062
640
"""Assert that the client has been seen, alive and well."""
1063
641
self.last_checked_ok = datetime.datetime.utcnow()
1064
642
self.last_checker_status = 0
1065
self.last_checker_signal = None
1066
643
self.bump_timeout()
1068
645
def bump_timeout(self, timeout=None):
1069
646
"""Bump up the timeout for this client."""
1070
647
if timeout is None:
1071
648
timeout = self.timeout
1072
649
if self.disable_initiator_tag is not None:
1073
GLib.source_remove(self.disable_initiator_tag)
650
gobject.source_remove(self.disable_initiator_tag)
1074
651
self.disable_initiator_tag = None
1075
652
if getattr(self, "enabled", False):
1076
self.disable_initiator_tag = GLib.timeout_add(
1077
int(timeout.total_seconds() * 1000), self.disable)
653
self.disable_initiator_tag = (gobject.timeout_add
654
(timedelta_to_milliseconds
655
(timeout), self.disable))
1078
656
self.expires = datetime.datetime.utcnow() + timeout
1080
658
def need_approval(self):
1081
659
self.last_approval_request = datetime.datetime.utcnow()
1083
661
def start_checker(self):
1084
662
"""Start a new checker subprocess if one is not running.
1086
664
If a checker already exists, leave it running and do
1088
666
# The reason for not killing a running checker is that if we
1093
671
# checkers alone, the checker would have to take more time
1094
672
# than 'timeout' for the client to be disabled, which is as it
1097
if self.checker is not None and not self.checker.is_alive():
1098
logger.warning("Checker was not alive; joining")
675
# If a checker exists, make sure it is not a zombie
677
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
678
except (AttributeError, OSError) as error:
679
if (isinstance(error, OSError)
680
and error.errno != errno.ECHILD):
684
logger.warning("Checker was a zombie")
685
gobject.source_remove(self.checker_callback_tag)
686
self.checker_callback(pid, status,
687
self.current_checker_command)
1101
688
# Start a new checker if needed
1102
689
if self.checker is None:
1103
# Escape attributes for the shell
1105
attr: re.escape(str(getattr(self, attr)))
1106
for attr in self.runtime_expansions}
1108
command = self.checker_command % escaped_attrs
1109
except TypeError as error:
1110
logger.error('Could not format string "%s"',
1111
self.checker_command,
691
# In case checker_command has exactly one % operator
692
command = self.checker_command % self.host
694
# Escape attributes for the shell
695
escaped_attrs = dict(
697
re.escape(unicode(str(getattr(self, attr, "")),
701
self.runtime_expansions)
704
command = self.checker_command % escaped_attrs
705
except TypeError as error:
706
logger.error('Could not format string "%s"',
707
self.checker_command, exc_info=error)
708
return True # Try again later
709
self.current_checker_command = command
711
logger.info("Starting checker %r for %s",
713
# We don't need to redirect stdout and stderr, since
714
# in normal mode, that is already done by daemon(),
715
# and in debug mode we don't want to. (Stdin is
716
# always replaced by /dev/null.)
717
self.checker = subprocess.Popen(command,
720
self.checker_callback_tag = (gobject.child_watch_add
722
self.checker_callback,
724
# The checker may have completed before the gobject
725
# watch was added. Check for this.
726
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
728
gobject.source_remove(self.checker_callback_tag)
729
self.checker_callback(pid, status, command)
730
except OSError as error:
731
logger.error("Failed to start subprocess",
1113
return True # Try again later
1114
self.current_checker_command = command
1115
logger.info("Starting checker %r for %s", command,
1117
# We don't need to redirect stdout and stderr, since
1118
# in normal mode, that is already done by daemon(),
1119
# and in debug mode we don't want to. (Stdin is
1120
# always replaced by /dev/null.)
1121
# The exception is when not debugging but nevertheless
1122
# running in the foreground; use the previously
1124
popen_args = {"close_fds": True,
1127
if (not self.server_settings["debug"]
1128
and self.server_settings["foreground"]):
1129
popen_args.update({"stdout": wnull,
1131
pipe = multiprocessing.Pipe(duplex=False)
1132
self.checker = multiprocessing.Process(
1134
args=(pipe[1], subprocess.call, command),
1136
self.checker.start()
1137
self.checker_callback_tag = GLib.io_add_watch(
1138
pipe[0].fileno(), GLib.IO_IN,
1139
self.checker_callback, pipe[0], command)
1140
# Re-run this periodically if run by GLib.timeout_add
733
# Re-run this periodically if run by gobject.timeout_add
1143
736
def stop_checker(self):
1144
737
"""Force the checker process, if any, to stop."""
1145
738
if self.checker_callback_tag:
1146
GLib.source_remove(self.checker_callback_tag)
739
gobject.source_remove(self.checker_callback_tag)
1147
740
self.checker_callback_tag = None
1148
741
if getattr(self, "checker", None) is None:
1150
743
logger.debug("Stopping checker for %(name)s", vars(self))
1151
self.checker.terminate()
745
self.checker.terminate()
747
#if self.checker.poll() is None:
748
# self.checker.kill()
749
except OSError as error:
750
if error.errno != errno.ESRCH: # No such process
1152
752
self.checker = None
1155
def dbus_service_property(dbus_interface,
755
def dbus_service_property(dbus_interface, signature="v",
756
access="readwrite", byte_arrays=False):
1159
757
"""Decorators for marking methods of a DBusObjectWithProperties to
1160
758
become properties on the D-Bus.
1162
760
The decorated method will be called with no arguments by "Get"
1163
761
and with one argument by "Set".
1165
763
The parameters, where they are supported, are the same as
1166
764
dbus.service.method, except there is only "signature", since the
1167
765
type from Get() and the type sent to Set() is the same.
1250
class DBusObjectWithAnnotations(dbus.service.Object):
1251
"""A D-Bus object with annotations.
1253
Classes inheriting from this can use the dbus_annotations
1254
decorator to add annotations to methods or signals.
841
class DBusObjectWithProperties(dbus.service.Object):
842
"""A D-Bus object with properties.
844
Classes inheriting from this can use the dbus_service_property
845
decorator to expose methods as D-Bus properties. It exposes the
846
standard Get(), Set(), and GetAll() methods on the D-Bus.
1258
850
def _is_dbus_thing(thing):
1259
851
"""Returns a function testing if an attribute is a D-Bus thing
1261
853
If called like _is_dbus_thing("method") it returns a function
1262
854
suitable for use as predicate to inspect.getmembers().
1264
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
856
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
1267
859
def _get_all_dbus_things(self, thing):
1268
860
"""Returns a generator of (name, attribute) pairs
1270
return ((getattr(athing.__get__(self), "_dbus_name", name),
862
return ((getattr(athing.__get__(self), "_dbus_name",
1271
864
athing.__get__(self))
1272
865
for cls in self.__class__.__mro__
1273
866
for name, athing in
1274
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1276
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1278
path_keyword='object_path',
1279
connection_keyword='connection')
1280
def Introspect(self, object_path, connection):
1281
"""Overloading of standard D-Bus method.
1283
Inserts annotation tags on methods and signals.
1285
xmlstring = dbus.service.Object.Introspect(self, object_path,
1288
document = xml.dom.minidom.parseString(xmlstring)
1290
for if_tag in document.getElementsByTagName("interface"):
1291
# Add annotation tags
1292
for typ in ("method", "signal"):
1293
for tag in if_tag.getElementsByTagName(typ):
1295
for name, prop in (self.
1296
_get_all_dbus_things(typ)):
1297
if (name == tag.getAttribute("name")
1298
and prop._dbus_interface
1299
== if_tag.getAttribute("name")):
1300
annots.update(getattr(
1301
prop, "_dbus_annotations", {}))
1302
for name, value in annots.items():
1303
ann_tag = document.createElement(
1305
ann_tag.setAttribute("name", name)
1306
ann_tag.setAttribute("value", value)
1307
tag.appendChild(ann_tag)
1308
# Add interface annotation tags
1309
for annotation, value in dict(
1310
itertools.chain.from_iterable(
1311
annotations().items()
1312
for name, annotations
1313
in self._get_all_dbus_things("interface")
1314
if name == if_tag.getAttribute("name")
1316
ann_tag = document.createElement("annotation")
1317
ann_tag.setAttribute("name", annotation)
1318
ann_tag.setAttribute("value", value)
1319
if_tag.appendChild(ann_tag)
1320
# Fix argument name for the Introspect method itself
1321
if (if_tag.getAttribute("name")
1322
== dbus.INTROSPECTABLE_IFACE):
1323
for cn in if_tag.getElementsByTagName("method"):
1324
if cn.getAttribute("name") == "Introspect":
1325
for arg in cn.getElementsByTagName("arg"):
1326
if (arg.getAttribute("direction")
1328
arg.setAttribute("name",
1330
xmlstring = document.toxml("utf-8")
1332
except (AttributeError, xml.dom.DOMException,
1333
xml.parsers.expat.ExpatError) as error:
1334
logger.error("Failed to override Introspection method",
1339
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1340
"""A D-Bus object with properties.
1342
Classes inheriting from this can use the dbus_service_property
1343
decorator to expose methods as D-Bus properties. It exposes the
1344
standard Get(), Set(), and GetAll() methods on the D-Bus.
867
inspect.getmembers(cls,
868
self._is_dbus_thing(thing)))
1347
870
def _get_dbus_property(self, interface_name, property_name):
1348
871
"""Returns a bound method if one exists which is a D-Bus
1349
872
property with the specified name and interface.
1351
for cls in self.__class__.__mro__:
1352
for name, value in inspect.getmembers(
1353
cls, self._is_dbus_thing("property")):
874
for cls in self.__class__.__mro__:
875
for name, value in (inspect.getmembers
877
self._is_dbus_thing("property"))):
1354
878
if (value._dbus_name == property_name
1355
879
and value._dbus_interface == interface_name):
1356
880
return value.__get__(self)
1358
882
# No such property
1359
raise DBusPropertyNotFound("{}:{}.{}".format(
1360
self.dbus_object_path, interface_name, property_name))
1363
def _get_all_interface_names(cls):
1364
"""Get a sequence of all interfaces supported by an object"""
1365
return (name for name in set(getattr(getattr(x, attr),
1366
"_dbus_interface", None)
1367
for x in (inspect.getmro(cls))
1369
if name is not None)
1371
@dbus.service.method(dbus.PROPERTIES_IFACE,
883
raise DBusPropertyNotFound(self.dbus_object_path + ":"
884
+ interface_name + "."
887
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1373
888
out_signature="v")
1374
889
def Get(self, interface_name, property_name):
1375
890
"""Standard D-Bus property Get() method, see D-Bus standard.
1504
1020
return xmlstring
1508
dbus.OBJECT_MANAGER_IFACE
1509
except AttributeError:
1510
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1513
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1514
"""A D-Bus object with an ObjectManager.
1516
Classes inheriting from this exposes the standard
1517
GetManagedObjects call and the InterfacesAdded and
1518
InterfacesRemoved signals on the standard
1519
"org.freedesktop.DBus.ObjectManager" interface.
1521
Note: No signals are sent automatically; they must be sent
1524
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1525
out_signature="a{oa{sa{sv}}}")
1526
def GetManagedObjects(self):
1527
"""This function must be overridden"""
1528
raise NotImplementedError()
1530
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1531
signature="oa{sa{sv}}")
1532
def InterfacesAdded(self, object_path, interfaces_and_properties):
1535
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1536
def InterfacesRemoved(self, object_path, interfaces):
1539
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1541
path_keyword='object_path',
1542
connection_keyword='connection')
1543
def Introspect(self, object_path, connection):
1544
"""Overloading of standard D-Bus method.
1546
Override return argument name of GetManagedObjects to be
1547
"objpath_interfaces_and_properties"
1549
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1553
document = xml.dom.minidom.parseString(xmlstring)
1555
for if_tag in document.getElementsByTagName("interface"):
1556
# Fix argument name for the GetManagedObjects method
1557
if (if_tag.getAttribute("name")
1558
== dbus.OBJECT_MANAGER_IFACE):
1559
for cn in if_tag.getElementsByTagName("method"):
1560
if (cn.getAttribute("name")
1561
== "GetManagedObjects"):
1562
for arg in cn.getElementsByTagName("arg"):
1563
if (arg.getAttribute("direction")
1567
"objpath_interfaces"
1569
xmlstring = document.toxml("utf-8")
1571
except (AttributeError, xml.dom.DOMException,
1572
xml.parsers.expat.ExpatError) as error:
1573
logger.error("Failed to override Introspection method",
1578
def datetime_to_dbus(dt, variant_level=0):
1023
def datetime_to_dbus (dt, variant_level=0):
1579
1024
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1581
return dbus.String("", variant_level=variant_level)
1582
return dbus.String(dt.isoformat(), variant_level=variant_level)
1026
return dbus.String("", variant_level = variant_level)
1027
return dbus.String(dt.isoformat(),
1028
variant_level=variant_level)
1585
1031
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1616
1061
# Ignore non-D-Bus attributes, and D-Bus attributes
1617
1062
# with the wrong interface name
1618
1063
if (not hasattr(attribute, "_dbus_interface")
1619
or not attribute._dbus_interface.startswith(
1620
orig_interface_name)):
1064
or not attribute._dbus_interface
1065
.startswith(orig_interface_name)):
1622
1067
# Create an alternate D-Bus interface name based on
1623
1068
# the current name
1624
alt_interface = attribute._dbus_interface.replace(
1625
orig_interface_name, alt_interface_name)
1069
alt_interface = (attribute._dbus_interface
1070
.replace(orig_interface_name,
1071
alt_interface_name))
1626
1072
interface_names.add(alt_interface)
1627
1073
# Is this a D-Bus signal?
1628
1074
if getattr(attribute, "_dbus_is_signal", False):
1629
# Extract the original non-method undecorated
1630
# function by black magic
1631
if sys.version_info.major == 2:
1632
nonmethod_func = (dict(
1075
# Extract the original non-method function by
1077
nonmethod_func = (dict(
1633
1078
zip(attribute.func_code.co_freevars,
1634
attribute.__closure__))
1635
["func"].cell_contents)
1637
nonmethod_func = (dict(
1638
zip(attribute.__code__.co_freevars,
1639
attribute.__closure__))
1640
["func"].cell_contents)
1079
attribute.__closure__))["func"]
1641
1081
# Create a new, but exactly alike, function
1642
1082
# object, and decorate it to be a new D-Bus signal
1643
1083
# with the alternate D-Bus interface name
1644
new_function = copy_function(nonmethod_func)
1645
new_function = (dbus.service.signal(
1647
attribute._dbus_signature)(new_function))
1084
new_function = (dbus.service.signal
1086
attribute._dbus_signature)
1087
(types.FunctionType(
1088
nonmethod_func.func_code,
1089
nonmethod_func.func_globals,
1090
nonmethod_func.func_name,
1091
nonmethod_func.func_defaults,
1092
nonmethod_func.func_closure)))
1648
1093
# Copy annotations, if any
1650
new_function._dbus_annotations = dict(
1651
attribute._dbus_annotations)
1095
new_function._dbus_annotations = (
1096
dict(attribute._dbus_annotations))
1652
1097
except AttributeError:
1655
1099
# Define a creator of a function to call both the
1656
1100
# original and alternate functions, so both the
1657
1101
# original and alternate signals gets sent when
1946
1384
server to mandos-client
1950
1388
# Rejected - signal
1951
1389
@dbus.service.signal(_interface, signature="s")
1952
1390
def Rejected(self, reason):
1956
1394
# NeedApproval - signal
1957
1395
@dbus.service.signal(_interface, signature="tb")
1958
1396
def NeedApproval(self, timeout, default):
1960
1398
return self.need_approval()
1964
1402
# Approve - method
1965
1403
@dbus.service.method(_interface, in_signature="b")
1966
1404
def Approve(self, value):
1967
1405
self.approve(value)
1969
1407
# CheckedOK - method
1970
1408
@dbus.service.method(_interface)
1971
1409
def CheckedOK(self):
1972
1410
self.checked_ok()
1974
1412
# Enable - method
1975
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1976
1413
@dbus.service.method(_interface)
1977
1414
def Enable(self):
1981
1418
# StartChecker - method
1982
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1983
1419
@dbus.service.method(_interface)
1984
1420
def StartChecker(self):
1986
1422
self.start_checker()
1988
1424
# Disable - method
1989
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1990
1425
@dbus.service.method(_interface)
1991
1426
def Disable(self):
1995
1430
# StopChecker - method
1996
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1997
1431
@dbus.service.method(_interface)
1998
1432
def StopChecker(self):
1999
1433
self.stop_checker()
2003
1437
# ApprovalPending - property
2004
1438
@dbus_service_property(_interface, signature="b", access="read")
2005
1439
def ApprovalPending_dbus_property(self):
2006
1440
return dbus.Boolean(bool(self.approvals_pending))
2008
1442
# ApprovedByDefault - property
2009
@dbus_service_property(_interface,
1443
@dbus_service_property(_interface, signature="b",
2011
1444
access="readwrite")
2012
1445
def ApprovedByDefault_dbus_property(self, value=None):
2013
1446
if value is None: # get
2014
1447
return dbus.Boolean(self.approved_by_default)
2015
1448
self.approved_by_default = bool(value)
2017
1450
# ApprovalDelay - property
2018
@dbus_service_property(_interface,
1451
@dbus_service_property(_interface, signature="t",
2020
1452
access="readwrite")
2021
1453
def ApprovalDelay_dbus_property(self, value=None):
2022
1454
if value is None: # get
2023
return dbus.UInt64(self.approval_delay.total_seconds()
1455
return dbus.UInt64(self.approval_delay_milliseconds())
2025
1456
self.approval_delay = datetime.timedelta(0, 0, 0, value)
2027
1458
# ApprovalDuration - property
2028
@dbus_service_property(_interface,
1459
@dbus_service_property(_interface, signature="t",
2030
1460
access="readwrite")
2031
1461
def ApprovalDuration_dbus_property(self, value=None):
2032
1462
if value is None: # get
2033
return dbus.UInt64(self.approval_duration.total_seconds()
1463
return dbus.UInt64(timedelta_to_milliseconds(
1464
self.approval_duration))
2035
1465
self.approval_duration = datetime.timedelta(0, 0, 0, value)
2037
1467
# Name - property
2039
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2040
1468
@dbus_service_property(_interface, signature="s", access="read")
2041
1469
def Name_dbus_property(self):
2042
1470
return dbus.String(self.name)
2046
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2047
@dbus_service_property(_interface, signature="s", access="read")
2048
def KeyID_dbus_property(self):
2049
return dbus.String(self.key_id)
2051
1472
# Fingerprint - property
2053
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2054
1473
@dbus_service_property(_interface, signature="s", access="read")
2055
1474
def Fingerprint_dbus_property(self):
2056
1475
return dbus.String(self.fingerprint)
2058
1477
# Host - property
2059
@dbus_service_property(_interface,
1478
@dbus_service_property(_interface, signature="s",
2061
1479
access="readwrite")
2062
1480
def Host_dbus_property(self, value=None):
2063
1481
if value is None: # get
2064
1482
return dbus.String(self.host)
2065
self.host = str(value)
1483
self.host = unicode(value)
2067
1485
# Created - property
2069
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2070
1486
@dbus_service_property(_interface, signature="s", access="read")
2071
1487
def Created_dbus_property(self):
2072
1488
return datetime_to_dbus(self.created)
2074
1490
# LastEnabled - property
2075
1491
@dbus_service_property(_interface, signature="s", access="read")
2076
1492
def LastEnabled_dbus_property(self):
2077
1493
return datetime_to_dbus(self.last_enabled)
2079
1495
# Enabled - property
2080
@dbus_service_property(_interface,
1496
@dbus_service_property(_interface, signature="b",
2082
1497
access="readwrite")
2083
1498
def Enabled_dbus_property(self, value=None):
2084
1499
if value is None: # get
2133
1547
if (getattr(self, "disable_initiator_tag", None)
2136
GLib.source_remove(self.disable_initiator_tag)
2137
self.disable_initiator_tag = GLib.timeout_add(
2138
int((self.expires - now).total_seconds() * 1000),
1550
gobject.source_remove(self.disable_initiator_tag)
1551
self.disable_initiator_tag = (
1552
gobject.timeout_add(
1553
timedelta_to_milliseconds(self.expires - now),
2141
1556
# ExtendedTimeout - property
2142
@dbus_service_property(_interface,
1557
@dbus_service_property(_interface, signature="t",
2144
1558
access="readwrite")
2145
1559
def ExtendedTimeout_dbus_property(self, value=None):
2146
1560
if value is None: # get
2147
return dbus.UInt64(self.extended_timeout.total_seconds()
1561
return dbus.UInt64(self.extended_timeout_milliseconds())
2149
1562
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2151
1564
# Interval - property
2152
@dbus_service_property(_interface,
1565
@dbus_service_property(_interface, signature="t",
2154
1566
access="readwrite")
2155
1567
def Interval_dbus_property(self, value=None):
2156
1568
if value is None: # get
2157
return dbus.UInt64(self.interval.total_seconds() * 1000)
1569
return dbus.UInt64(self.interval_milliseconds())
2158
1570
self.interval = datetime.timedelta(0, 0, 0, value)
2159
1571
if getattr(self, "checker_initiator_tag", None) is None:
2161
1573
if self.enabled:
2162
1574
# Reschedule checker run
2163
GLib.source_remove(self.checker_initiator_tag)
2164
self.checker_initiator_tag = GLib.timeout_add(
2165
value, self.start_checker)
2166
self.start_checker() # Start one now, too
1575
gobject.source_remove(self.checker_initiator_tag)
1576
self.checker_initiator_tag = (gobject.timeout_add
1577
(value, self.start_checker))
1578
self.start_checker() # Start one now, too
2168
1580
# Checker - property
2169
@dbus_service_property(_interface,
1581
@dbus_service_property(_interface, signature="s",
2171
1582
access="readwrite")
2172
1583
def Checker_dbus_property(self, value=None):
2173
1584
if value is None: # get
2174
1585
return dbus.String(self.checker_command)
2175
self.checker_command = str(value)
1586
self.checker_command = unicode(value)
2177
1588
# CheckerRunning - property
2178
@dbus_service_property(_interface,
1589
@dbus_service_property(_interface, signature="b",
2180
1590
access="readwrite")
2181
1591
def CheckerRunning_dbus_property(self, value=None):
2182
1592
if value is None: # get
2239
1639
class ClientHandler(socketserver.BaseRequestHandler, object):
2240
1640
"""A class to handle client connections.
2242
1642
Instantiated once for each connection to handle it.
2243
1643
Note: This will run in its own forked process."""
2245
1645
def handle(self):
2246
1646
with contextlib.closing(self.server.child_pipe) as child_pipe:
2247
1647
logger.info("TCP connection from: %s",
2248
str(self.client_address))
1648
unicode(self.client_address))
2249
1649
logger.debug("Pipe FD: %d",
2250
1650
self.server.child_pipe.fileno())
2252
session = gnutls.ClientSession(self.request)
2254
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2255
# "+AES-256-CBC", "+SHA1",
2256
# "+COMP-NULL", "+CTYPE-OPENPGP",
1652
session = (gnutls.connection
1653
.ClientSession(self.request,
1655
.X509Credentials()))
1657
# Note: gnutls.connection.X509Credentials is really a
1658
# generic GnuTLS certificate credentials object so long as
1659
# no X.509 keys are added to it. Therefore, we can use it
1660
# here despite using OpenPGP certificates.
1662
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1663
# "+AES-256-CBC", "+SHA1",
1664
# "+COMP-NULL", "+CTYPE-OPENPGP",
2258
1666
# Use a fallback default, since this MUST be set.
2259
1667
priority = self.server.gnutls_priority
2260
1668
if priority is None:
2261
1669
priority = "NORMAL"
2262
gnutls.priority_set_direct(session._c_object,
2263
priority.encode("utf-8"),
1670
(gnutls.library.functions
1671
.gnutls_priority_set_direct(session._c_object,
2266
1674
# Start communication using the Mandos protocol
2267
1675
# Get protocol number
2268
1676
line = self.request.makefile().readline()
2269
1677
logger.debug("Protocol version: %r", line)
2271
1679
if int(line.strip().split()[0]) > 1:
2272
raise RuntimeError(line)
2273
1681
except (ValueError, IndexError, RuntimeError) as error:
2274
1682
logger.error("Unknown protocol version: %s", error)
2277
1685
# Start GnuTLS connection
2279
1687
session.handshake()
2280
except gnutls.Error as error:
1688
except gnutls.errors.GNUTLSError as error:
2281
1689
logger.warning("Handshake failed: %s", error)
2282
1690
# Do not run session.bye() here: the session is not
2283
1691
# established. Just abandon the request.
2285
1693
logger.debug("Handshake succeeded")
2287
1695
approval_required = False
2289
if gnutls.has_rawpk:
2292
key_id = self.key_id(
2293
self.peer_certificate(session))
2294
except (TypeError, gnutls.Error) as error:
2295
logger.warning("Bad certificate: %s", error)
2297
logger.debug("Key ID: %s", key_id)
2302
fpr = self.fingerprint(
2303
self.peer_certificate(session))
2304
except (TypeError, gnutls.Error) as error:
2305
logger.warning("Bad certificate: %s", error)
2307
logger.debug("Fingerprint: %s", fpr)
2310
client = ProxyClient(child_pipe, key_id, fpr,
1698
fpr = self.fingerprint(self.peer_certificate
1701
gnutls.errors.GNUTLSError) as error:
1702
logger.warning("Bad certificate: %s", error)
1704
logger.debug("Fingerprint: %s", fpr)
1707
client = ProxyClient(child_pipe, fpr,
2311
1708
self.client_address)
2312
1709
except KeyError:
2315
1712
if client.approval_delay:
2316
1713
delay = client.approval_delay
2317
1714
client.approvals_pending += 1
2318
1715
approval_required = True
2321
1718
if not client.enabled:
2322
1719
logger.info("Client %s is disabled",
2324
1721
if self.server.use_dbus:
2325
1722
# Emit D-Bus signal
2326
1723
client.Rejected("Disabled")
2329
1726
if client.approved or not client.approval_delay:
2330
# We are approved or approval is disabled
1727
#We are approved or approval is disabled
2332
1729
elif client.approved is None:
2333
1730
logger.info("Client %s needs approval",
2366
1765
delay -= time2 - time
2369
session.send(client.secret)
2370
except gnutls.Error as error:
2371
logger.warning("gnutls send failed",
1768
while sent_size < len(client.secret):
1770
sent = session.send(client.secret[sent_size:])
1771
except gnutls.errors.GNUTLSError as error:
1772
logger.warning("gnutls send failed",
1775
logger.debug("Sent: %d, remaining: %d",
1776
sent, len(client.secret)
1777
- (sent_size + sent))
2375
1780
logger.info("Sending secret to %s", client.name)
2376
1781
# bump the timeout using extended_timeout
2377
1782
client.bump_timeout(client.extended_timeout)
2378
1783
if self.server.use_dbus:
2379
1784
# Emit D-Bus signal
2380
1785
client.GotSecret()
2383
1788
if approval_required:
2384
1789
client.approvals_pending -= 1
2387
except gnutls.Error as error:
1792
except gnutls.errors.GNUTLSError as error:
2388
1793
logger.warning("GnuTLS bye failed",
2389
1794
exc_info=error)
2392
1797
def peer_certificate(session):
2393
"Return the peer's certificate as a bytestring"
2395
cert_type = gnutls.certificate_type_get2(session._c_object,
2397
except AttributeError:
2398
cert_type = gnutls.certificate_type_get(session._c_object)
2399
if gnutls.has_rawpk:
2400
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2402
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2403
# If not a valid certificate type...
2404
if cert_type not in valid_cert_types:
2405
logger.info("Cert type %r not in %r", cert_type,
2407
# ...return invalid data
1798
"Return the peer's OpenPGP certificate as a bytestring"
1799
# If not an OpenPGP certificate...
1800
if (gnutls.library.functions
1801
.gnutls_certificate_type_get(session._c_object)
1802
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1803
# ...do the normal thing
1804
return session.peer_certificate
2409
1805
list_size = ctypes.c_uint(1)
2410
cert_list = (gnutls.certificate_get_peers
1806
cert_list = (gnutls.library.functions
1807
.gnutls_certificate_get_peers
2411
1808
(session._c_object, ctypes.byref(list_size)))
2412
1809
if not bool(cert_list) and list_size.value != 0:
2413
raise gnutls.Error("error getting peer certificate")
1810
raise gnutls.errors.GNUTLSError("error getting peer"
2414
1812
if list_size.value == 0:
2416
1814
cert = cert_list[0]
2417
1815
return ctypes.string_at(cert.data, cert.size)
2420
def key_id(certificate):
2421
"Convert a certificate bytestring to a hexdigit key ID"
2422
# New GnuTLS "datum" with the public key
2423
datum = gnutls.datum_t(
2424
ctypes.cast(ctypes.c_char_p(certificate),
2425
ctypes.POINTER(ctypes.c_ubyte)),
2426
ctypes.c_uint(len(certificate)))
2427
# XXX all these need to be created in the gnutls "module"
2428
# New empty GnuTLS certificate
2429
pubkey = gnutls.pubkey_t()
2430
gnutls.pubkey_init(ctypes.byref(pubkey))
2431
# Import the raw public key into the certificate
2432
gnutls.pubkey_import(pubkey,
2433
ctypes.byref(datum),
2434
gnutls.X509_FMT_DER)
2435
# New buffer for the key ID
2436
buf = ctypes.create_string_buffer(32)
2437
buf_len = ctypes.c_size_t(len(buf))
2438
# Get the key ID from the raw public key into the buffer
2439
gnutls.pubkey_get_key_id(pubkey,
2440
gnutls.KEYID_USE_SHA256,
2441
ctypes.cast(ctypes.byref(buf),
2442
ctypes.POINTER(ctypes.c_ubyte)),
2443
ctypes.byref(buf_len))
2444
# Deinit the certificate
2445
gnutls.pubkey_deinit(pubkey)
2447
# Convert the buffer to a Python bytestring
2448
key_id = ctypes.string_at(buf, buf_len.value)
2449
# Convert the bytestring to hexadecimal notation
2450
hex_key_id = binascii.hexlify(key_id).upper()
2454
1818
def fingerprint(openpgp):
2455
1819
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2456
1820
# New GnuTLS "datum" with the OpenPGP public key
2457
datum = gnutls.datum_t(
2458
ctypes.cast(ctypes.c_char_p(openpgp),
2459
ctypes.POINTER(ctypes.c_ubyte)),
2460
ctypes.c_uint(len(openpgp)))
1821
datum = (gnutls.library.types
1822
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1825
ctypes.c_uint(len(openpgp))))
2461
1826
# New empty GnuTLS certificate
2462
crt = gnutls.openpgp_crt_t()
2463
gnutls.openpgp_crt_init(ctypes.byref(crt))
1827
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1828
(gnutls.library.functions
1829
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2464
1830
# Import the OpenPGP public key into the certificate
2465
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2466
gnutls.OPENPGP_FMT_RAW)
1831
(gnutls.library.functions
1832
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1833
gnutls.library.constants
1834
.GNUTLS_OPENPGP_FMT_RAW))
2467
1835
# Verify the self signature in the key
2468
1836
crtverify = ctypes.c_uint()
2469
gnutls.openpgp_crt_verify_self(crt, 0,
2470
ctypes.byref(crtverify))
1837
(gnutls.library.functions
1838
.gnutls_openpgp_crt_verify_self(crt, 0,
1839
ctypes.byref(crtverify)))
2471
1840
if crtverify.value != 0:
2472
gnutls.openpgp_crt_deinit(crt)
2473
raise gnutls.CertificateSecurityError(code
1841
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1842
raise (gnutls.errors.CertificateSecurityError
2475
1844
# New buffer for the fingerprint
2476
1845
buf = ctypes.create_string_buffer(20)
2477
1846
buf_len = ctypes.c_size_t()
2478
1847
# Get the fingerprint from the certificate into the buffer
2479
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2480
ctypes.byref(buf_len))
1848
(gnutls.library.functions
1849
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1850
ctypes.byref(buf_len)))
2481
1851
# Deinit the certificate
2482
gnutls.openpgp_crt_deinit(crt)
1852
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2483
1853
# Convert the buffer to a Python bytestring
2484
1854
fpr = ctypes.string_at(buf, buf_len.value)
2485
1855
# Convert the bytestring to hexadecimal notation
2490
1860
class MultiprocessingMixIn(object):
2491
1861
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2493
1862
def sub_process_main(self, request, address):
2495
1864
self.finish_request(request, address)
2496
1865
except Exception:
2497
1866
self.handle_error(request, address)
2498
1867
self.close_request(request)
2500
1869
def process_request(self, request, address):
2501
1870
"""Start a new process to process the request."""
2502
proc = multiprocessing.Process(target=self.sub_process_main,
2503
args=(request, address))
1871
proc = multiprocessing.Process(target = self.sub_process_main,
1872
args = (request, address))
2508
1877
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2509
1878
""" adds a pipe to the MixIn """
2511
1879
def process_request(self, request, client_address):
2512
1880
"""Overrides and wraps the original process_request().
2514
1882
This function creates a new pipe in self.pipe
2516
1884
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2518
1886
proc = MultiprocessingMixIn.process_request(self, request,
2519
1887
client_address)
2520
1888
self.child_pipe.close()
2521
1889
self.add_pipe(parent_pipe, proc)
2523
1891
def add_pipe(self, parent_pipe, proc):
2524
1892
"""Dummy function; override as necessary"""
2525
raise NotImplementedError()
1893
raise NotImplementedError
2528
1896
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2529
1897
socketserver.TCPServer, object):
2530
1898
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2533
1901
enabled: Boolean; whether this server is activated yet
2534
1902
interface: None or a network interface name (string)
2535
1903
use_ipv6: Boolean; to use IPv6 or not
2538
1905
def __init__(self, server_address, RequestHandlerClass,
2542
"""If socketfd is set, use that file descriptor instead of
2543
creating a new one with socket.socket().
1906
interface=None, use_ipv6=True):
2545
1907
self.interface = interface
2547
1909
self.address_family = socket.AF_INET6
2548
if socketfd is not None:
2549
# Save the file descriptor
2550
self.socketfd = socketfd
2551
# Save the original socket.socket() function
2552
self.socket_socket = socket.socket
2554
# To implement --socket, we monkey patch socket.socket.
2556
# (When socketserver.TCPServer is a new-style class, we
2557
# could make self.socket into a property instead of monkey
2558
# patching socket.socket.)
2560
# Create a one-time-only replacement for socket.socket()
2561
@functools.wraps(socket.socket)
2562
def socket_wrapper(*args, **kwargs):
2563
# Restore original function so subsequent calls are
2565
socket.socket = self.socket_socket
2566
del self.socket_socket
2567
# This time only, return a new socket object from the
2568
# saved file descriptor.
2569
return socket.fromfd(self.socketfd, *args, **kwargs)
2570
# Replace socket.socket() function with wrapper
2571
socket.socket = socket_wrapper
2572
# The socketserver.TCPServer.__init__ will call
2573
# socket.socket(), which might be our replacement,
2574
# socket_wrapper(), if socketfd was set.
2575
1910
socketserver.TCPServer.__init__(self, server_address,
2576
1911
RequestHandlerClass)
2578
1912
def server_bind(self):
2579
1913
"""This overrides the normal server_bind() function
2580
1914
to bind to an interface if one was specified, and also NOT to
2581
1915
bind to an address or port if they were not specified."""
2582
global SO_BINDTODEVICE
2583
1916
if self.interface is not None:
2584
1917
if SO_BINDTODEVICE is None:
2585
# Fall back to a hard-coded value which seems to be
2587
logger.warning("SO_BINDTODEVICE not found, trying 25")
2588
SO_BINDTODEVICE = 25
2590
self.socket.setsockopt(
2591
socket.SOL_SOCKET, SO_BINDTODEVICE,
2592
(self.interface + "\0").encode("utf-8"))
2593
except socket.error as error:
2594
if error.errno == errno.EPERM:
2595
logger.error("No permission to bind to"
2596
" interface %s", self.interface)
2597
elif error.errno == errno.ENOPROTOOPT:
2598
logger.error("SO_BINDTODEVICE not available;"
2599
" cannot bind to interface %s",
2601
elif error.errno == errno.ENODEV:
2602
logger.error("Interface %s does not exist,"
2603
" cannot bind", self.interface)
1918
logger.error("SO_BINDTODEVICE does not exist;"
1919
" cannot bind to interface %s",
1923
self.socket.setsockopt(socket.SOL_SOCKET,
1927
except socket.error as error:
1928
if error[0] == errno.EPERM:
1929
logger.error("No permission to"
1930
" bind to interface %s",
1932
elif error[0] == errno.ENOPROTOOPT:
1933
logger.error("SO_BINDTODEVICE not available;"
1934
" cannot bind to interface %s",
2606
1938
# Only bind(2) the socket if we really need to.
2607
1939
if self.server_address[0] or self.server_address[1]:
2608
1940
if not self.server_address[0]:
2609
1941
if self.address_family == socket.AF_INET6:
2610
any_address = "::" # in6addr_any
1942
any_address = "::" # in6addr_any
2612
any_address = "0.0.0.0" # INADDR_ANY
1944
any_address = socket.INADDR_ANY
2613
1945
self.server_address = (any_address,
2614
1946
self.server_address[1])
2615
1947
elif not self.server_address[1]:
2616
self.server_address = (self.server_address[0], 0)
1948
self.server_address = (self.server_address[0],
2617
1950
# if self.interface:
2618
1951
# self.server_address = (self.server_address[0],
2649
1977
self.gnutls_priority = gnutls_priority
2650
1978
IPv6_TCPServer.__init__(self, server_address,
2651
1979
RequestHandlerClass,
2652
interface=interface,
1980
interface = interface,
1981
use_ipv6 = use_ipv6)
2656
1982
def server_activate(self):
2657
1983
if self.enabled:
2658
1984
return socketserver.TCPServer.server_activate(self)
2660
1986
def enable(self):
2661
1987
self.enabled = True
2663
1989
def add_pipe(self, parent_pipe, proc):
2664
1990
# Call "handle_ipc" for both data and EOF events
2666
parent_pipe.fileno(),
2667
GLib.IO_IN | GLib.IO_HUP,
2668
functools.partial(self.handle_ipc,
2669
parent_pipe=parent_pipe,
2672
def handle_ipc(self, source, condition,
2675
client_object=None):
1991
gobject.io_add_watch(parent_pipe.fileno(),
1992
gobject.IO_IN | gobject.IO_HUP,
1993
functools.partial(self.handle_ipc,
1998
def handle_ipc(self, source, condition, parent_pipe=None,
1999
proc = None, client_object=None):
2676
2000
# error, or the other end of multiprocessing.Pipe has closed
2677
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2001
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2678
2002
# Wait for other process to exit
2682
2006
# Read a request from the child
2683
2007
request = parent_pipe.recv()
2684
2008
command = request[0]
2686
2010
if command == 'init':
2687
key_id = request[1].decode("ascii")
2688
fpr = request[2].decode("ascii")
2689
address = request[3]
2691
for c in self.clients.values():
2692
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2694
if key_id and c.key_id == key_id:
2697
if fpr and c.fingerprint == fpr:
2012
address = request[2]
2014
for c in self.clients.itervalues():
2015
if c.fingerprint == fpr:
2701
logger.info("Client not found for key ID: %s, address"
2702
": %s", key_id or fpr, address)
2019
logger.info("Client not found for fingerprint: %s, ad"
2020
"dress: %s", fpr, address)
2703
2021
if self.use_dbus:
2704
2022
# Emit D-Bus signal
2705
mandos_dbus_service.ClientNotFound(key_id or fpr,
2023
mandos_dbus_service.ClientNotFound(fpr,
2707
2025
parent_pipe.send(False)
2711
parent_pipe.fileno(),
2712
GLib.IO_IN | GLib.IO_HUP,
2713
functools.partial(self.handle_ipc,
2714
parent_pipe=parent_pipe,
2716
client_object=client))
2028
gobject.io_add_watch(parent_pipe.fileno(),
2029
gobject.IO_IN | gobject.IO_HUP,
2030
functools.partial(self.handle_ipc,
2717
2036
parent_pipe.send(True)
2718
2037
# remove the old hook in favor of the new above hook on
2722
2041
funcname = request[1]
2723
2042
args = request[2]
2724
2043
kwargs = request[3]
2726
2045
parent_pipe.send(('data', getattr(client_object,
2727
2046
funcname)(*args,
2730
2049
if command == 'getattr':
2731
2050
attrname = request[1]
2732
if isinstance(client_object.__getattribute__(attrname),
2733
collections.Callable):
2734
parent_pipe.send(('function', ))
2051
if callable(client_object.__getattribute__(attrname)):
2052
parent_pipe.send(('function',))
2737
'data', client_object.__getattribute__(attrname)))
2054
parent_pipe.send(('data', client_object
2055
.__getattribute__(attrname)))
2739
2057
if command == 'setattr':
2740
2058
attrname = request[1]
2741
2059
value = request[2]
2742
2060
setattr(client_object, attrname, value)
2747
def rfc3339_duration_to_delta(duration):
2748
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2750
>>> rfc3339_duration_to_delta("P7D")
2751
datetime.timedelta(7)
2752
>>> rfc3339_duration_to_delta("PT60S")
2753
datetime.timedelta(0, 60)
2754
>>> rfc3339_duration_to_delta("PT60M")
2755
datetime.timedelta(0, 3600)
2756
>>> rfc3339_duration_to_delta("PT24H")
2757
datetime.timedelta(1)
2758
>>> rfc3339_duration_to_delta("P1W")
2759
datetime.timedelta(7)
2760
>>> rfc3339_duration_to_delta("PT5M30S")
2761
datetime.timedelta(0, 330)
2762
>>> rfc3339_duration_to_delta("P1DT3M20S")
2763
datetime.timedelta(1, 200)
2766
# Parsing an RFC 3339 duration with regular expressions is not
2767
# possible - there would have to be multiple places for the same
2768
# values, like seconds. The current code, while more esoteric, is
2769
# cleaner without depending on a parsing library. If Python had a
2770
# built-in library for parsing we would use it, but we'd like to
2771
# avoid excessive use of external libraries.
2773
# New type for defining tokens, syntax, and semantics all-in-one
2774
Token = collections.namedtuple("Token", (
2775
"regexp", # To match token; if "value" is not None, must have
2776
# a "group" containing digits
2777
"value", # datetime.timedelta or None
2778
"followers")) # Tokens valid after this token
2779
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2780
# the "duration" ABNF definition in RFC 3339, Appendix A.
2781
token_end = Token(re.compile(r"$"), None, frozenset())
2782
token_second = Token(re.compile(r"(\d+)S"),
2783
datetime.timedelta(seconds=1),
2784
frozenset((token_end, )))
2785
token_minute = Token(re.compile(r"(\d+)M"),
2786
datetime.timedelta(minutes=1),
2787
frozenset((token_second, token_end)))
2788
token_hour = Token(re.compile(r"(\d+)H"),
2789
datetime.timedelta(hours=1),
2790
frozenset((token_minute, token_end)))
2791
token_time = Token(re.compile(r"T"),
2793
frozenset((token_hour, token_minute,
2795
token_day = Token(re.compile(r"(\d+)D"),
2796
datetime.timedelta(days=1),
2797
frozenset((token_time, token_end)))
2798
token_month = Token(re.compile(r"(\d+)M"),
2799
datetime.timedelta(weeks=4),
2800
frozenset((token_day, token_end)))
2801
token_year = Token(re.compile(r"(\d+)Y"),
2802
datetime.timedelta(weeks=52),
2803
frozenset((token_month, token_end)))
2804
token_week = Token(re.compile(r"(\d+)W"),
2805
datetime.timedelta(weeks=1),
2806
frozenset((token_end, )))
2807
token_duration = Token(re.compile(r"P"), None,
2808
frozenset((token_year, token_month,
2809
token_day, token_time,
2811
# Define starting values:
2813
value = datetime.timedelta()
2815
# Following valid tokens
2816
followers = frozenset((token_duration, ))
2817
# String left to parse
2819
# Loop until end token is found
2820
while found_token is not token_end:
2821
# Search for any currently valid tokens
2822
for token in followers:
2823
match = token.regexp.match(s)
2824
if match is not None:
2826
if token.value is not None:
2827
# Value found, parse digits
2828
factor = int(match.group(1), 10)
2829
# Add to value so far
2830
value += factor * token.value
2831
# Strip token from string
2832
s = token.regexp.sub("", s, 1)
2835
# Set valid next tokens
2836
followers = found_token.followers
2839
# No currently valid tokens were found
2840
raise ValueError("Invalid RFC 3339 duration: {!r}"
2846
2065
def string_to_delta(interval):
2847
2066
"""Parse a string and return a datetime.timedelta
2849
2068
>>> string_to_delta('7d')
2850
2069
datetime.timedelta(7)
2851
2070
>>> string_to_delta('60s')
2946
2160
parser.add_argument("--no-dbus", action="store_false",
2947
2161
dest="use_dbus", help="Do not provide D-Bus"
2948
" system bus interface", default=None)
2162
" system bus interface")
2949
2163
parser.add_argument("--no-ipv6", action="store_false",
2950
dest="use_ipv6", help="Do not use IPv6",
2164
dest="use_ipv6", help="Do not use IPv6")
2952
2165
parser.add_argument("--no-restore", action="store_false",
2953
2166
dest="restore", help="Do not restore stored"
2954
" state", default=None)
2955
parser.add_argument("--socket", type=int,
2956
help="Specify a file descriptor to a network"
2957
" socket to use instead of creating one")
2958
2168
parser.add_argument("--statedir", metavar="DIR",
2959
2169
help="Directory to save/restore state in")
2960
parser.add_argument("--foreground", action="store_true",
2961
help="Run in foreground", default=None)
2962
parser.add_argument("--no-zeroconf", action="store_false",
2963
dest="zeroconf", help="Do not use Zeroconf",
2966
2171
options = parser.parse_args()
2968
2173
if options.check:
2970
fail_count, test_count = doctest.testmod()
2971
sys.exit(os.EX_OK if fail_count == 0 else 1)
2973
2178
# Default values for config file for server-global settings
2974
if gnutls.has_rawpk:
2975
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2976
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2978
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2979
":+SIGN-DSA-SHA256")
2980
server_defaults = {"interface": "",
2984
"priority": priority,
2985
"servicename": "Mandos",
2991
"statedir": "/var/lib/mandos",
2992
"foreground": "False",
2179
server_defaults = { "interface": "",
2184
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2185
"servicename": "Mandos",
2190
"statedir": "/var/lib/mandos"
2997
2193
# Parse config file for server-global settings
2998
2194
server_config = configparser.SafeConfigParser(server_defaults)
2999
2195
del server_defaults
3000
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2196
server_config.read(os.path.join(options.configdir,
3001
2198
# Convert the SafeConfigParser object to a dict
3002
2199
server_settings = server_config.defaults()
3003
2200
# Use the appropriate methods on the non-string config options
3004
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3005
"foreground", "zeroconf"):
2201
for option in ("debug", "use_dbus", "use_ipv6"):
3006
2202
server_settings[option] = server_config.getboolean("DEFAULT",
3008
2204
if server_settings["port"]:
3009
2205
server_settings["port"] = server_config.getint("DEFAULT",
3011
if server_settings["socket"]:
3012
server_settings["socket"] = server_config.getint("DEFAULT",
3014
# Later, stdin will, and stdout and stderr might, be dup'ed
3015
# over with an opened os.devnull. But we don't want this to
3016
# happen with a supplied network socket.
3017
if 0 <= server_settings["socket"] <= 2:
3018
server_settings["socket"] = os.dup(server_settings
3020
2207
del server_config
3022
2209
# Override the settings from the config file with command line
3023
2210
# options, if set.
3024
2211
for option in ("interface", "address", "port", "debug",
3025
"priority", "servicename", "configdir", "use_dbus",
3026
"use_ipv6", "debuglevel", "restore", "statedir",
3027
"socket", "foreground", "zeroconf"):
2212
"priority", "servicename", "configdir",
2213
"use_dbus", "use_ipv6", "debuglevel", "restore",
3028
2215
value = getattr(options, option)
3029
2216
if value is not None:
3030
2217
server_settings[option] = value
3032
2219
# Force all strings to be unicode
3033
2220
for option in server_settings.keys():
3034
if isinstance(server_settings[option], bytes):
3035
server_settings[option] = (server_settings[option]
3037
# Force all boolean options to be boolean
3038
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3039
"foreground", "zeroconf"):
3040
server_settings[option] = bool(server_settings[option])
3041
# Debug implies foreground
3042
if server_settings["debug"]:
3043
server_settings["foreground"] = True
2221
if type(server_settings[option]) is str:
2222
server_settings[option] = unicode(server_settings[option])
3044
2223
# Now we have our good server settings in "server_settings"
3046
2225
##################################################################
3048
if (not server_settings["zeroconf"]
3049
and not (server_settings["port"]
3050
or server_settings["socket"] != "")):
3051
parser.error("Needs port or socket to work without Zeroconf")
3053
2227
# For convenience
3054
2228
debug = server_settings["debug"]
3055
2229
debuglevel = server_settings["debuglevel"]
3125
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3127
2290
except OSError as error:
3128
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3129
.format(uid, gid, os.strerror(error.errno)))
3130
if error.errno != errno.EPERM:
2291
if error[0] != errno.EPERM:
3134
2295
# Enable all possible GnuTLS debugging
3136
2297
# "Use a log level over 10 to enable all debugging options."
3137
2298
# - GnuTLS manual
3138
gnutls.global_set_log_level(11)
2299
gnutls.library.functions.gnutls_global_set_log_level(11)
2301
@gnutls.library.types.gnutls_log_func
3141
2302
def debug_gnutls(level, string):
3142
2303
logger.debug("GnuTLS: %s", string[:-1])
3144
gnutls.global_set_log_function(debug_gnutls)
2305
(gnutls.library.functions
2306
.gnutls_global_set_log_function(debug_gnutls))
3146
2308
# Redirect stdin so all checkers get /dev/null
3147
2309
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
3148
2310
os.dup2(null, sys.stdin.fileno())
3152
2314
# Need to fork before connecting to D-Bus
3154
2316
# Close all input and output, do double fork, etc.
3157
# multiprocessing will use threads, so before we use GLib we need
3158
# to inform GLib that threads will be used.
2319
gobject.threads_init()
3161
2321
global main_loop
3162
2322
# From the Avahi example code
3163
2323
DBusGMainLoop(set_as_default=True)
3164
main_loop = GLib.MainLoop()
2324
main_loop = gobject.MainLoop()
3165
2325
bus = dbus.SystemBus()
3166
2326
# End of Avahi example code
3169
2329
bus_name = dbus.service.BusName("se.recompile.Mandos",
3172
old_bus_name = dbus.service.BusName(
3173
"se.bsnet.fukt.Mandos", bus,
3175
except dbus.exceptions.DBusException as e:
2330
bus, do_not_queue=True)
2331
old_bus_name = (dbus.service.BusName
2332
("se.bsnet.fukt.Mandos", bus,
2334
except dbus.exceptions.NameExistsException as e:
3176
2335
logger.error("Disabling D-Bus:", exc_info=e)
3177
2336
use_dbus = False
3178
2337
server_settings["use_dbus"] = False
3179
2338
tcp_server.use_dbus = False
3181
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3182
service = AvahiServiceToSyslog(
3183
name=server_settings["servicename"],
3184
servicetype="_mandos._tcp",
3187
if server_settings["interface"]:
3188
service.interface = if_nametoindex(
3189
server_settings["interface"].encode("utf-8"))
2339
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2340
service = AvahiServiceToSyslog(name =
2341
server_settings["servicename"],
2342
servicetype = "_mandos._tcp",
2343
protocol = protocol, bus = bus)
2344
if server_settings["interface"]:
2345
service.interface = (if_nametoindex
2346
(str(server_settings["interface"])))
3191
2348
global multiprocessing_manager
3192
2349
multiprocessing_manager = multiprocessing.Manager()
3194
2351
client_class = Client
3196
client_class = functools.partial(ClientDBus, bus=bus)
2353
client_class = functools.partial(ClientDBus, bus = bus)
3198
2355
client_settings = Client.config_parser(client_config)
3199
2356
old_client_settings = {}
3200
2357
clients_data = {}
3202
# This is used to redirect stdout and stderr for checker processes
3204
wnull = open(os.devnull, "w") # A writable /dev/null
3205
# Only used if server is running in foreground but not in debug
3207
if debug or not foreground:
3210
2359
# Get client data and settings from last running state.
3211
2360
if server_settings["restore"]:
3213
2362
with open(stored_state_path, "rb") as stored_state:
3214
if sys.version_info.major == 2:
3215
clients_data, old_client_settings = pickle.load(
3218
bytes_clients_data, bytes_old_client_settings = (
3219
pickle.load(stored_state, encoding="bytes"))
3220
# Fix bytes to strings
3223
clients_data = {(key.decode("utf-8")
3224
if isinstance(key, bytes)
3227
bytes_clients_data.items()}
3228
del bytes_clients_data
3229
for key in clients_data:
3230
value = {(k.decode("utf-8")
3231
if isinstance(k, bytes) else k): v
3233
clients_data[key].items()}
3234
clients_data[key] = value
3236
value["client_structure"] = [
3238
if isinstance(s, bytes)
3240
value["client_structure"]]
3242
for k in ("name", "host"):
3243
if isinstance(value[k], bytes):
3244
value[k] = value[k].decode("utf-8")
3245
if not value.has_key("key_id"):
3246
value["key_id"] = ""
3247
elif not value.has_key("fingerprint"):
3248
value["fingerprint"] = ""
3249
# old_client_settings
3251
old_client_settings = {
3252
(key.decode("utf-8")
3253
if isinstance(key, bytes)
3256
bytes_old_client_settings.items()}
3257
del bytes_old_client_settings
3259
for value in old_client_settings.values():
3260
if isinstance(value["host"], bytes):
3261
value["host"] = (value["host"]
2363
clients_data, old_client_settings = (pickle.load
3263
2365
os.remove(stored_state_path)
3264
2366
except IOError as e:
3265
2367
if e.errno == errno.ENOENT:
3266
logger.warning("Could not load persistent state:"
3267
" {}".format(os.strerror(e.errno)))
2368
logger.warning("Could not load persistent state: {0}"
2369
.format(os.strerror(e.errno)))
3269
2371
logger.critical("Could not load persistent state:",
3272
2374
except EOFError as e:
3273
2375
logger.warning("Could not load persistent state: "
2376
"EOFError:", exc_info=e)
3277
2378
with PGPEngine() as pgp:
3278
for client_name, client in clients_data.items():
3279
# Skip removed clients
3280
if client_name not in client_settings:
2379
for client_name, client in clients_data.iteritems():
3283
2380
# Decide which value to use after restoring saved state.
3284
2381
# We have three different values: Old config file,
3285
2382
# new config file, and saved state.
3343
2440
for client_name in (set(client_settings)
3344
2441
- set(old_client_settings)):
3345
2442
clients_data[client_name] = client_settings[client_name]
3347
2444
# Create all client objects
3348
for client_name, client in clients_data.items():
2445
for client_name, client in clients_data.iteritems():
3349
2446
tcp_server.clients[client_name] = client_class(
3352
server_settings=server_settings)
2447
name = client_name, settings = client)
3354
2449
if not tcp_server.clients:
3355
2450
logger.warning("No clients defined")
3358
if pidfile is not None:
3362
print(pid, file=pidfile)
3364
logger.error("Could not write to file %r with PID %d",
2456
pidfile.write(str(pid) + "\n".encode("utf-8"))
2459
logger.error("Could not write to file %r with PID %d",
2462
# "pidfile" was never created
3367
2464
del pidfilename
3369
for termsig in (signal.SIGHUP, signal.SIGTERM):
3370
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3371
lambda: main_loop.quit() and False)
2465
signal.signal(signal.SIGINT, signal.SIG_IGN)
2467
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2468
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3375
@alternate_dbus_interfaces(
3376
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3377
class MandosDBusService(DBusObjectWithObjectManager):
2471
@alternate_dbus_interfaces({"se.recompile.Mandos":
2472
"se.bsnet.fukt.Mandos"})
2473
class MandosDBusService(DBusObjectWithProperties):
3378
2474
"""A D-Bus proxy object"""
3380
2475
def __init__(self):
3381
2476
dbus.service.Object.__init__(self, bus, "/")
3383
2477
_interface = "se.recompile.Mandos"
2479
@dbus_interface_annotations(_interface)
2481
return { "org.freedesktop.DBus.Property"
2482
".EmitsChangedSignal":
3385
2485
@dbus.service.signal(_interface, signature="o")
3386
2486
def ClientAdded(self, objpath):
3390
2490
@dbus.service.signal(_interface, signature="ss")
3391
def ClientNotFound(self, key_id, address):
2491
def ClientNotFound(self, fingerprint, address):
3395
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3397
2495
@dbus.service.signal(_interface, signature="os")
3398
2496
def ClientRemoved(self, objpath, name):
3402
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3404
2500
@dbus.service.method(_interface, out_signature="ao")
3405
2501
def GetAllClients(self):
3407
return dbus.Array(c.dbus_object_path for c in
3408
tcp_server.clients.values())
3410
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2503
return dbus.Array(c.dbus_object_path
2505
tcp_server.clients.itervalues())
3412
2507
@dbus.service.method(_interface,
3413
2508
out_signature="a{oa{sv}}")
3414
2509
def GetAllClientsWithProperties(self):
3416
2511
return dbus.Dictionary(
3417
{c.dbus_object_path: c.GetAll(
3418
"se.recompile.Mandos.Client")
3419
for c in tcp_server.clients.values()},
2512
((c.dbus_object_path, c.GetAll(""))
2513
for c in tcp_server.clients.itervalues()),
3420
2514
signature="oa{sv}")
3422
2516
@dbus.service.method(_interface, in_signature="o")
3423
2517
def RemoveClient(self, object_path):
3425
for c in tcp_server.clients.values():
2519
for c in tcp_server.clients.itervalues():
3426
2520
if c.dbus_object_path == object_path:
3427
2521
del tcp_server.clients[c.name]
3428
2522
c.remove_from_connection()
3429
# Don't signal the disabling
2523
# Don't signal anything except ClientRemoved
3430
2524
c.disable(quiet=True)
3431
# Emit D-Bus signal for removal
3432
self.client_removed_signal(c)
2526
self.ClientRemoved(object_path, c.name)
3434
2528
raise KeyError(object_path)
3438
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3439
out_signature="a{oa{sa{sv}}}")
3440
def GetManagedObjects(self):
3442
return dbus.Dictionary(
3443
{client.dbus_object_path:
3445
{interface: client.GetAll(interface)
3447
client._get_all_interface_names()})
3448
for client in tcp_server.clients.values()})
3450
def client_added_signal(self, client):
3451
"""Send the new standard signal and the old signal"""
3453
# New standard signal
3454
self.InterfacesAdded(
3455
client.dbus_object_path,
3457
{interface: client.GetAll(interface)
3459
client._get_all_interface_names()}))
3461
self.ClientAdded(client.dbus_object_path)
3463
def client_removed_signal(self, client):
3464
"""Send the new standard signal and the old signal"""
3466
# New standard signal
3467
self.InterfacesRemoved(
3468
client.dbus_object_path,
3469
client._get_all_interface_names())
3471
self.ClientRemoved(client.dbus_object_path,
3474
2532
mandos_dbus_service = MandosDBusService()
3476
# Save modules to variables to exempt the modules from being
3477
# unloaded before the function registered with atexit() is run.
3478
mp = multiprocessing
3482
2535
"Cleanup function; run on exit"
3486
mp.active_children()
2538
multiprocessing.active_children()
3488
2539
if not (tcp_server.clients or client_settings):
3491
2542
# Store client before exiting. Secrets are encrypted with key
3492
2543
# based on what config file has. If config file is
3493
2544
# removed/edited, old secret will thus be unrecovable.
3495
2546
with PGPEngine() as pgp:
3496
for client in tcp_server.clients.values():
2547
for client in tcp_server.clients.itervalues():
3497
2548
key = client_settings[client.name]["secret"]
3498
2549
client.encrypted_secret = pgp.encrypt(client.secret,
3500
2551
client_dict = {}
3502
2553
# A list of attributes that can not be pickled
3504
exclude = {"bus", "changedstate", "secret",
3505
"checker", "server_settings"}
3506
for name, typ in inspect.getmembers(dbus.service
2555
exclude = set(("bus", "changedstate", "secret",
2557
for name, typ in (inspect.getmembers
2558
(dbus.service.Object)):
3508
2559
exclude.add(name)
3510
2561
client_dict["encrypted_secret"] = (client
3511
2562
.encrypted_secret)
3512
2563
for attr in client.client_structure:
3513
2564
if attr not in exclude:
3514
2565
client_dict[attr] = getattr(client, attr)
3516
2567
clients[client.name] = client_dict
3517
2568
del client_settings[client.name]["secret"]
3520
with tempfile.NamedTemporaryFile(
3524
dir=os.path.dirname(stored_state_path),
3525
delete=False) as stored_state:
3526
pickle.dump((clients, client_settings), stored_state,
3528
tempname = stored_state.name
2571
with (tempfile.NamedTemporaryFile
2572
(mode='wb', suffix=".pickle", prefix='clients-',
2573
dir=os.path.dirname(stored_state_path),
2574
delete=False)) as stored_state:
2575
pickle.dump((clients, client_settings), stored_state)
2576
tempname=stored_state.name
3529
2577
os.rename(tempname, stored_state_path)
3530
2578
except (IOError, OSError) as e: