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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 © 2008-2012 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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# 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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# 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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# 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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# 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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# 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 this program. If not, see
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# <http://www.gnu.org/licenses/>.
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# along with Mandos. If not, see <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 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 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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SO_BINDTODEVICE = None
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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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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"))
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if_nametoindex = ctypes.cdll.LoadLibrary(
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ctypes.util.find_library("c")).if_nametoindex
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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(str("16s16x"),
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interface_index = struct.unpack(str("I"),
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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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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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return b"mandos" + binascii.hexlify(password)
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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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def encrypt(self, data, password):
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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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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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return ciphertext
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def decrypt(self, data, password):
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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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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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return decrypted_plaintext
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# Pretend that we have an Avahi module
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"""This isn't so much a class as it is a module-like namespace.
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It is instantiated once, and simulates having an Avahi module."""
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IF_UNSPEC = -1 # avahi-common/address.h
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PROTO_UNSPEC = -1 # avahi-common/address.h
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PROTO_INET = 0 # avahi-common/address.h
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PROTO_INET6 = 1 # avahi-common/address.h
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DBUS_NAME = "org.freedesktop.Avahi"
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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
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DBUS_PATH_SERVER = "/"
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def string_array_to_txt_array(self, t):
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return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
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for s in t), signature="ay")
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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
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SERVER_INVALID = 0 # avahi-common/defs.h
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SERVER_REGISTERING = 1 # avahi-common/defs.h
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SERVER_RUNNING = 2 # avahi-common/defs.h
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SERVER_COLLISION = 3 # avahi-common/defs.h
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SERVER_FAILURE = 4 # avahi-common/defs.h
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class AvahiError(Exception):
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def __init__(self, value, *args, **kwargs):
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self.value = value
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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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return super(AvahiError, self).__init__(value, *args,
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class AvahiServiceError(AvahiError):
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class AvahiGroupError(AvahiError):
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class AvahiService(object):
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"""An Avahi (Zeroconf) service.
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interface: integer; avahi.IF_UNSPEC or an interface index.
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Used to optionally bind to the specified interface.
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name: string; Example: 'Mandos'
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type: string; Example: '_mandos._tcp'.
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See <http://www.dns-sd.org/ServiceTypes.html>
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See <https://www.iana.org/assignments/service-names-port-numbers>
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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 = 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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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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def timedelta_to_milliseconds(td):
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"Convert a datetime.timedelta() to milliseconds"
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return ((td.days * 24 * 60 * 60 * 1000)
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+ (td.seconds * 1000)
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+ (td.microseconds // 1000))
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# Pretend that we have a GnuTLS module
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class GnuTLS(object):
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"""This isn't so much a class as it is a module-like namespace.
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It is instantiated once, and simulates having a GnuTLS module."""
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library = ctypes.util.find_library("gnutls")
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library = ctypes.util.find_library("gnutls-deb0")
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_library = ctypes.cdll.LoadLibrary(library)
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_need_version = b"3.3.0"
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_tls_rawpk_version = b"3.6.6"
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# Need to use "self" here, since this method is called before
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# the assignment to the "gnutls" global variable happens.
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if self.check_version(self._need_version) is None:
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raise self.Error("Needs GnuTLS {} or later"
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.format(self._need_version))
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# Unless otherwise indicated, the constants and types below are
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# all from the gnutls/gnutls.h C header file.
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E_NO_CERTIFICATE_FOUND = -49
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KEYID_USE_SHA256 = 1 # gnutls/x509.h
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OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
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class session_int(ctypes.Structure):
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session_t = ctypes.POINTER(session_int)
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class certificate_credentials_st(ctypes.Structure):
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certificate_credentials_t = ctypes.POINTER(
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certificate_credentials_st)
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certificate_type_t = ctypes.c_int
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class datum_t(ctypes.Structure):
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_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
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('size', ctypes.c_uint)]
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class openpgp_crt_int(ctypes.Structure):
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openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
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openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
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log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
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credentials_type_t = ctypes.c_int
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transport_ptr_t = ctypes.c_void_p
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close_request_t = ctypes.c_int
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class Error(Exception):
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# We need to use the class name "GnuTLS" here, since this
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# exception might be raised from within GnuTLS.__init__,
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# which is called before the assignment to the "gnutls"
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# global variable has happened.
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def __init__(self, message=None, code=None, args=()):
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# Default usage is by a message string, but if a return
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# code is passed, convert it to a string with
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if message is None and code is not None:
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message = GnuTLS.strerror(code)
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return super(GnuTLS.Error, self).__init__(
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class CertificateSecurityError(Error):
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class Credentials(object):
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self._c_object = gnutls.certificate_credentials_t()
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gnutls.certificate_allocate_credentials(
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ctypes.byref(self._c_object))
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self.type = gnutls.CRD_CERTIFICATE
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gnutls.certificate_free_credentials(self._c_object)
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class ClientSession(object):
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def __init__(self, socket, credentials=None):
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self._c_object = gnutls.session_t()
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gnutls_flags = gnutls.CLIENT
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if gnutls.check_version("3.5.6"):
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gnutls_flags |= gnutls.NO_TICKETS
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gnutls_flags |= gnutls.ENABLE_RAWPK
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gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
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gnutls.set_default_priority(self._c_object)
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gnutls.transport_set_ptr(self._c_object, socket.fileno())
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gnutls.handshake_set_private_extensions(self._c_object,
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if credentials is None:
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credentials = gnutls.Credentials()
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gnutls.credentials_set(self._c_object, credentials.type,
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ctypes.cast(credentials._c_object,
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self.credentials = credentials
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gnutls.deinit(self._c_object)
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return gnutls.handshake(self._c_object)
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def send(self, data):
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data_len -= gnutls.record_send(self._c_object,
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return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
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# Error handling functions
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def _error_code(result):
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"""A function to raise exceptions on errors, suitable
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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):
654
return _error_code(result)
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result = func(*arguments)
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# Unless otherwise indicated, the function declarations below are
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# all from the gnutls/gnutls.h C header file.
662
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)]
685
certificate_allocate_credentials.restype = _error_code
687
certificate_free_credentials = (
688
_library.gnutls_certificate_free_credentials)
689
certificate_free_credentials.argtypes = [
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certificate_credentials_t]
691
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
713
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)
717
global_set_log_level = _library.gnutls_global_set_log_level
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global_set_log_level.argtypes = [ctypes.c_int]
719
global_set_log_level.restype = None
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global_set_log_function = _library.gnutls_global_set_log_function
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global_set_log_function.argtypes = [log_func]
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global_set_log_function.restype = None
725
deinit = _library.gnutls_deinit
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deinit.argtypes = [session_t]
727
deinit.restype = None
729
handshake = _library.gnutls_handshake
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handshake.argtypes = [session_t]
731
handshake.restype = _error_code
732
handshake.errcheck = _retry_on_error
734
transport_set_ptr = _library.gnutls_transport_set_ptr
735
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
736
transport_set_ptr.restype = None
738
bye = _library.gnutls_bye
739
bye.argtypes = [session_t, close_request_t]
740
bye.restype = _error_code
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bye.errcheck = _retry_on_error
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check_version = _library.gnutls_check_version
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check_version.argtypes = [ctypes.c_char_p]
745
check_version.restype = ctypes.c_char_p
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has_rawpk = bool(check_version(_tls_rawpk_version))
751
class pubkey_st(ctypes.Structure):
753
pubkey_t = ctypes.POINTER(pubkey_st)
755
x509_crt_fmt_t = ctypes.c_int
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# All the function declarations below are from gnutls/abstract.h
758
pubkey_init = _library.gnutls_pubkey_init
759
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
760
pubkey_init.restype = _error_code
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pubkey_import = _library.gnutls_pubkey_import
763
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
765
pubkey_import.restype = _error_code
767
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
768
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
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ctypes.POINTER(ctypes.c_ubyte),
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ctypes.POINTER(ctypes.c_size_t)]
771
pubkey_get_key_id.restype = _error_code
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pubkey_deinit = _library.gnutls_pubkey_deinit
774
pubkey_deinit.argtypes = [pubkey_t]
775
pubkey_deinit.restype = None
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# All the function declarations below are from gnutls/openpgp.h
779
openpgp_crt_init = _library.gnutls_openpgp_crt_init
780
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
781
openpgp_crt_init.restype = _error_code
783
openpgp_crt_import = _library.gnutls_openpgp_crt_import
784
openpgp_crt_import.argtypes = [openpgp_crt_t,
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ctypes.POINTER(datum_t),
787
openpgp_crt_import.restype = _error_code
789
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
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openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
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ctypes.POINTER(ctypes.c_uint)]
792
openpgp_crt_verify_self.restype = _error_code
794
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
795
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
796
openpgp_crt_deinit.restype = None
798
openpgp_crt_get_fingerprint = (
799
_library.gnutls_openpgp_crt_get_fingerprint)
800
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
804
openpgp_crt_get_fingerprint.restype = _error_code
806
if check_version("3.6.4"):
807
certificate_type_get2 = _library.gnutls_certificate_type_get2
808
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
809
certificate_type_get2.restype = _error_code
811
# Remove non-public functions
812
del _error_code, _retry_on_error
813
# Create the global "gnutls" object, simulating a module
817
def call_pipe(connection, # : multiprocessing.Connection
818
func, *args, **kwargs):
819
"""This function is meant to be called by multiprocessing.Process
821
This function runs func(*args, **kwargs), and writes the resulting
822
return value on the provided multiprocessing.Connection.
824
connection.send(func(*args, **kwargs))
401
828
class Client(object):
402
829
"""A representation of a client host served by this server.
405
832
approved: bool(); 'None' if not yet approved/disapproved
406
833
approval_delay: datetime.timedelta(); Time to wait for approval
590
1013
logger.info("Disabling client %s", self.name)
591
1014
if getattr(self, "disable_initiator_tag", None) is not None:
592
gobject.source_remove(self.disable_initiator_tag)
1015
GLib.source_remove(self.disable_initiator_tag)
593
1016
self.disable_initiator_tag = None
594
1017
self.expires = None
595
1018
if getattr(self, "checker_initiator_tag", None) is not None:
596
gobject.source_remove(self.checker_initiator_tag)
1019
GLib.source_remove(self.checker_initiator_tag)
597
1020
self.checker_initiator_tag = None
598
1021
self.stop_checker()
599
1022
self.enabled = False
601
1024
self.send_changedstate()
602
# Do not run this again if called by a gobject.timeout_add
1025
# Do not run this again if called by a GLib.timeout_add
605
1028
def __del__(self):
608
1031
def init_checker(self):
609
1032
# Schedule a new checker to be started an 'interval' from now,
610
1033
# and every interval from then on.
611
1034
if self.checker_initiator_tag is not None:
612
gobject.source_remove(self.checker_initiator_tag)
613
self.checker_initiator_tag = (gobject.timeout_add
614
(self.interval_milliseconds(),
1035
GLib.source_remove(self.checker_initiator_tag)
1036
self.checker_initiator_tag = GLib.timeout_add(
1037
int(self.interval.total_seconds() * 1000),
616
1039
# Schedule a disable() when 'timeout' has passed
617
1040
if self.disable_initiator_tag is not None:
618
gobject.source_remove(self.disable_initiator_tag)
619
self.disable_initiator_tag = (gobject.timeout_add
620
(self.timeout_milliseconds(),
1041
GLib.source_remove(self.disable_initiator_tag)
1042
self.disable_initiator_tag = GLib.timeout_add(
1043
int(self.timeout.total_seconds() * 1000), self.disable)
622
1044
# Also start a new checker *right now*.
623
1045
self.start_checker()
625
def checker_callback(self, pid, condition, command):
1047
def checker_callback(self, source, condition, connection,
626
1049
"""The checker has completed, so take appropriate actions."""
627
1050
self.checker_callback_tag = None
628
1051
self.checker = None
629
if os.WIFEXITED(condition):
630
self.last_checker_status = os.WEXITSTATUS(condition)
1052
# Read return code from connection (see call_pipe)
1053
returncode = connection.recv()
1057
self.last_checker_status = returncode
1058
self.last_checker_signal = None
631
1059
if self.last_checker_status == 0:
632
1060
logger.info("Checker for %(name)s succeeded",
634
1062
self.checked_ok()
636
logger.info("Checker for %(name)s failed",
1064
logger.info("Checker for %(name)s failed", vars(self))
639
1066
self.last_checker_status = -1
1067
self.last_checker_signal = -returncode
640
1068
logger.warning("Checker for %(name)s crashed?",
643
1072
def checked_ok(self):
644
1073
"""Assert that the client has been seen, alive and well."""
645
1074
self.last_checked_ok = datetime.datetime.utcnow()
646
1075
self.last_checker_status = 0
1076
self.last_checker_signal = None
647
1077
self.bump_timeout()
649
1079
def bump_timeout(self, timeout=None):
650
1080
"""Bump up the timeout for this client."""
651
1081
if timeout is None:
652
1082
timeout = self.timeout
653
1083
if self.disable_initiator_tag is not None:
654
gobject.source_remove(self.disable_initiator_tag)
1084
GLib.source_remove(self.disable_initiator_tag)
655
1085
self.disable_initiator_tag = None
656
1086
if getattr(self, "enabled", False):
657
self.disable_initiator_tag = (gobject.timeout_add
658
(timedelta_to_milliseconds
659
(timeout), self.disable))
1087
self.disable_initiator_tag = GLib.timeout_add(
1088
int(timeout.total_seconds() * 1000), self.disable)
660
1089
self.expires = datetime.datetime.utcnow() + timeout
662
1091
def need_approval(self):
663
1092
self.last_approval_request = datetime.datetime.utcnow()
665
1094
def start_checker(self):
666
1095
"""Start a new checker subprocess if one is not running.
668
1097
If a checker already exists, leave it running and do
670
1099
# The reason for not killing a running checker is that if we
675
1104
# checkers alone, the checker would have to take more time
676
1105
# than 'timeout' for the client to be disabled, which is as it
679
# If a checker exists, make sure it is not a zombie
681
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
682
except (AttributeError, OSError) as error:
683
if (isinstance(error, OSError)
684
and error.errno != errno.ECHILD):
688
logger.warning("Checker was a zombie")
689
gobject.source_remove(self.checker_callback_tag)
690
self.checker_callback(pid, status,
691
self.current_checker_command)
1108
if self.checker is not None and not self.checker.is_alive():
1109
logger.warning("Checker was not alive; joining")
692
1112
# Start a new checker if needed
693
1113
if self.checker is None:
694
1114
# Escape attributes for the shell
695
escaped_attrs = dict(
696
(attr, re.escape(unicode(getattr(self, attr))))
698
self.runtime_expansions)
1116
attr: re.escape(str(getattr(self, attr)))
1117
for attr in self.runtime_expansions}
700
1119
command = self.checker_command % escaped_attrs
701
1120
except TypeError as error:
702
1121
logger.error('Could not format string "%s"',
703
self.checker_command, exc_info=error)
704
return True # Try again later
1122
self.checker_command,
1124
return True # Try again later
705
1125
self.current_checker_command = command
707
logger.info("Starting checker %r for %s",
709
# We don't need to redirect stdout and stderr, since
710
# in normal mode, that is already done by daemon(),
711
# and in debug mode we don't want to. (Stdin is
712
# always replaced by /dev/null.)
713
self.checker = subprocess.Popen(command,
716
except OSError as error:
717
logger.error("Failed to start subprocess",
719
self.checker_callback_tag = (gobject.child_watch_add
721
self.checker_callback,
723
# The checker may have completed before the gobject
724
# watch was added. Check for this.
725
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
727
gobject.source_remove(self.checker_callback_tag)
728
self.checker_callback(pid, status, command)
729
# Re-run this periodically if run by gobject.timeout_add
1126
logger.info("Starting checker %r for %s", command,
1128
# We don't need to redirect stdout and stderr, since
1129
# in normal mode, that is already done by daemon(),
1130
# and in debug mode we don't want to. (Stdin is
1131
# always replaced by /dev/null.)
1132
# The exception is when not debugging but nevertheless
1133
# running in the foreground; use the previously
1135
popen_args = {"close_fds": True,
1138
if (not self.server_settings["debug"]
1139
and self.server_settings["foreground"]):
1140
popen_args.update({"stdout": wnull,
1142
pipe = multiprocessing.Pipe(duplex=False)
1143
self.checker = multiprocessing.Process(
1145
args=(pipe[1], subprocess.call, command),
1147
self.checker.start()
1148
self.checker_callback_tag = GLib.io_add_watch(
1149
pipe[0].fileno(), GLib.IO_IN,
1150
self.checker_callback, pipe[0], command)
1151
# Re-run this periodically if run by GLib.timeout_add
732
1154
def stop_checker(self):
733
1155
"""Force the checker process, if any, to stop."""
734
1156
if self.checker_callback_tag:
735
gobject.source_remove(self.checker_callback_tag)
1157
GLib.source_remove(self.checker_callback_tag)
736
1158
self.checker_callback_tag = None
737
1159
if getattr(self, "checker", None) is None:
739
1161
logger.debug("Stopping checker for %(name)s", vars(self))
741
self.checker.terminate()
743
#if self.checker.poll() is None:
744
# self.checker.kill()
745
except OSError as error:
746
if error.errno != errno.ESRCH: # No such process
1162
self.checker.terminate()
748
1163
self.checker = None
751
def dbus_service_property(dbus_interface, signature="v",
752
access="readwrite", byte_arrays=False):
1166
def dbus_service_property(dbus_interface,
753
1170
"""Decorators for marking methods of a DBusObjectWithProperties to
754
1171
become properties on the D-Bus.
756
1173
The decorated method will be called with no arguments by "Get"
757
1174
and with one argument by "Set".
759
1176
The parameters, where they are supported, are the same as
760
1177
dbus.service.method, except there is only "signature", since the
761
1178
type from Get() and the type sent to Set() is the same.
837
class DBusObjectWithProperties(dbus.service.Object):
838
"""A D-Bus object with properties.
840
Classes inheriting from this can use the dbus_service_property
841
decorator to expose methods as D-Bus properties. It exposes the
842
standard Get(), Set(), and GetAll() methods on the D-Bus.
1261
class DBusObjectWithAnnotations(dbus.service.Object):
1262
"""A D-Bus object with annotations.
1264
Classes inheriting from this can use the dbus_annotations
1265
decorator to add annotations to methods or signals.
846
1269
def _is_dbus_thing(thing):
847
1270
"""Returns a function testing if an attribute is a D-Bus thing
849
1272
If called like _is_dbus_thing("method") it returns a function
850
1273
suitable for use as predicate to inspect.getmembers().
852
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
1275
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
855
1278
def _get_all_dbus_things(self, thing):
856
1279
"""Returns a generator of (name, attribute) pairs
858
return ((getattr(athing.__get__(self), "_dbus_name",
1281
return ((getattr(athing.__get__(self), "_dbus_name", name),
860
1282
athing.__get__(self))
861
1283
for cls in self.__class__.__mro__
862
1284
for name, athing in
863
inspect.getmembers(cls,
864
self._is_dbus_thing(thing)))
1285
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1287
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1289
path_keyword='object_path',
1290
connection_keyword='connection')
1291
def Introspect(self, object_path, connection):
1292
"""Overloading of standard D-Bus method.
1294
Inserts annotation tags on methods and signals.
1296
xmlstring = dbus.service.Object.Introspect(self, object_path,
1299
document = xml.dom.minidom.parseString(xmlstring)
1301
for if_tag in document.getElementsByTagName("interface"):
1302
# Add annotation tags
1303
for typ in ("method", "signal"):
1304
for tag in if_tag.getElementsByTagName(typ):
1306
for name, prop in (self.
1307
_get_all_dbus_things(typ)):
1308
if (name == tag.getAttribute("name")
1309
and prop._dbus_interface
1310
== if_tag.getAttribute("name")):
1311
annots.update(getattr(
1312
prop, "_dbus_annotations", {}))
1313
for name, value in annots.items():
1314
ann_tag = document.createElement(
1316
ann_tag.setAttribute("name", name)
1317
ann_tag.setAttribute("value", value)
1318
tag.appendChild(ann_tag)
1319
# Add interface annotation tags
1320
for annotation, value in dict(
1321
itertools.chain.from_iterable(
1322
annotations().items()
1323
for name, annotations
1324
in self._get_all_dbus_things("interface")
1325
if name == if_tag.getAttribute("name")
1327
ann_tag = document.createElement("annotation")
1328
ann_tag.setAttribute("name", annotation)
1329
ann_tag.setAttribute("value", value)
1330
if_tag.appendChild(ann_tag)
1331
# Fix argument name for the Introspect method itself
1332
if (if_tag.getAttribute("name")
1333
== dbus.INTROSPECTABLE_IFACE):
1334
for cn in if_tag.getElementsByTagName("method"):
1335
if cn.getAttribute("name") == "Introspect":
1336
for arg in cn.getElementsByTagName("arg"):
1337
if (arg.getAttribute("direction")
1339
arg.setAttribute("name",
1341
xmlstring = document.toxml("utf-8")
1343
except (AttributeError, xml.dom.DOMException,
1344
xml.parsers.expat.ExpatError) as error:
1345
logger.error("Failed to override Introspection method",
1350
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1351
"""A D-Bus object with properties.
1353
Classes inheriting from this can use the dbus_service_property
1354
decorator to expose methods as D-Bus properties. It exposes the
1355
standard Get(), Set(), and GetAll() methods on the D-Bus.
866
1358
def _get_dbus_property(self, interface_name, property_name):
867
1359
"""Returns a bound method if one exists which is a D-Bus
868
1360
property with the specified name and interface.
870
for cls in self.__class__.__mro__:
871
for name, value in (inspect.getmembers
873
self._is_dbus_thing("property"))):
1362
for cls in self.__class__.__mro__:
1363
for name, value in inspect.getmembers(
1364
cls, self._is_dbus_thing("property")):
874
1365
if (value._dbus_name == property_name
875
1366
and value._dbus_interface == interface_name):
876
1367
return value.__get__(self)
878
1369
# No such property
879
raise DBusPropertyNotFound(self.dbus_object_path + ":"
880
+ interface_name + "."
883
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1370
raise DBusPropertyNotFound("{}:{}.{}".format(
1371
self.dbus_object_path, interface_name, property_name))
1374
def _get_all_interface_names(cls):
1375
"""Get a sequence of all interfaces supported by an object"""
1376
return (name for name in set(getattr(getattr(x, attr),
1377
"_dbus_interface", None)
1378
for x in (inspect.getmro(cls))
1380
if name is not None)
1382
@dbus.service.method(dbus.PROPERTIES_IFACE,
884
1384
out_signature="v")
885
1385
def Get(self, interface_name, property_name):
886
1386
"""Standard D-Bus property Get() method, see D-Bus standard.
1016
1515
return xmlstring
1519
dbus.OBJECT_MANAGER_IFACE
1520
except AttributeError:
1521
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1524
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1525
"""A D-Bus object with an ObjectManager.
1527
Classes inheriting from this exposes the standard
1528
GetManagedObjects call and the InterfacesAdded and
1529
InterfacesRemoved signals on the standard
1530
"org.freedesktop.DBus.ObjectManager" interface.
1532
Note: No signals are sent automatically; they must be sent
1535
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1536
out_signature="a{oa{sa{sv}}}")
1537
def GetManagedObjects(self):
1538
"""This function must be overridden"""
1539
raise NotImplementedError()
1541
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1542
signature="oa{sa{sv}}")
1543
def InterfacesAdded(self, object_path, interfaces_and_properties):
1546
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1547
def InterfacesRemoved(self, object_path, interfaces):
1550
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1552
path_keyword='object_path',
1553
connection_keyword='connection')
1554
def Introspect(self, object_path, connection):
1555
"""Overloading of standard D-Bus method.
1557
Override return argument name of GetManagedObjects to be
1558
"objpath_interfaces_and_properties"
1560
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1564
document = xml.dom.minidom.parseString(xmlstring)
1566
for if_tag in document.getElementsByTagName("interface"):
1567
# Fix argument name for the GetManagedObjects method
1568
if (if_tag.getAttribute("name")
1569
== dbus.OBJECT_MANAGER_IFACE):
1570
for cn in if_tag.getElementsByTagName("method"):
1571
if (cn.getAttribute("name")
1572
== "GetManagedObjects"):
1573
for arg in cn.getElementsByTagName("arg"):
1574
if (arg.getAttribute("direction")
1578
"objpath_interfaces"
1580
xmlstring = document.toxml("utf-8")
1582
except (AttributeError, xml.dom.DOMException,
1583
xml.parsers.expat.ExpatError) as error:
1584
logger.error("Failed to override Introspection method",
1019
1589
def datetime_to_dbus(dt, variant_level=0):
1020
1590
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1022
return dbus.String("", variant_level = variant_level)
1023
return dbus.String(dt.isoformat(),
1024
variant_level=variant_level)
1592
return dbus.String("", variant_level=variant_level)
1593
return dbus.String(dt.isoformat(), variant_level=variant_level)
1027
1596
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1057
1627
# Ignore non-D-Bus attributes, and D-Bus attributes
1058
1628
# with the wrong interface name
1059
1629
if (not hasattr(attribute, "_dbus_interface")
1060
or not attribute._dbus_interface
1061
.startswith(orig_interface_name)):
1630
or not attribute._dbus_interface.startswith(
1631
orig_interface_name)):
1063
1633
# Create an alternate D-Bus interface name based on
1064
1634
# the current name
1065
alt_interface = (attribute._dbus_interface
1066
.replace(orig_interface_name,
1067
alt_interface_name))
1635
alt_interface = attribute._dbus_interface.replace(
1636
orig_interface_name, alt_interface_name)
1068
1637
interface_names.add(alt_interface)
1069
1638
# Is this a D-Bus signal?
1070
1639
if getattr(attribute, "_dbus_is_signal", False):
1071
# Extract the original non-method function by
1073
nonmethod_func = (dict(
1640
# Extract the original non-method undecorated
1641
# function by black magic
1642
if sys.version_info.major == 2:
1643
nonmethod_func = (dict(
1074
1644
zip(attribute.func_code.co_freevars,
1075
attribute.__closure__))["func"]
1645
attribute.__closure__))
1646
["func"].cell_contents)
1648
nonmethod_func = (dict(
1649
zip(attribute.__code__.co_freevars,
1650
attribute.__closure__))
1651
["func"].cell_contents)
1077
1652
# Create a new, but exactly alike, function
1078
1653
# object, and decorate it to be a new D-Bus signal
1079
1654
# with the alternate D-Bus interface name
1080
new_function = (dbus.service.signal
1082
attribute._dbus_signature)
1083
(types.FunctionType(
1084
nonmethod_func.func_code,
1085
nonmethod_func.func_globals,
1086
nonmethod_func.func_name,
1087
nonmethod_func.func_defaults,
1088
nonmethod_func.func_closure)))
1655
new_function = copy_function(nonmethod_func)
1656
new_function = (dbus.service.signal(
1658
attribute._dbus_signature)(new_function))
1089
1659
# Copy annotations, if any
1091
new_function._dbus_annotations = (
1092
dict(attribute._dbus_annotations))
1661
new_function._dbus_annotations = dict(
1662
attribute._dbus_annotations)
1093
1663
except AttributeError:
1095
1666
# Define a creator of a function to call both the
1096
1667
# original and alternate functions, so both the
1097
1668
# original and alternate signals gets sent when
1380
1957
server to mandos-client
1384
1961
# Rejected - signal
1385
1962
@dbus.service.signal(_interface, signature="s")
1386
1963
def Rejected(self, reason):
1390
1967
# NeedApproval - signal
1391
1968
@dbus.service.signal(_interface, signature="tb")
1392
1969
def NeedApproval(self, timeout, default):
1394
1971
return self.need_approval()
1398
1975
# Approve - method
1399
1976
@dbus.service.method(_interface, in_signature="b")
1400
1977
def Approve(self, value):
1401
1978
self.approve(value)
1403
1980
# CheckedOK - method
1404
1981
@dbus.service.method(_interface)
1405
1982
def CheckedOK(self):
1406
1983
self.checked_ok()
1408
1985
# Enable - method
1986
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1409
1987
@dbus.service.method(_interface)
1410
1988
def Enable(self):
1414
1992
# StartChecker - method
1993
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1415
1994
@dbus.service.method(_interface)
1416
1995
def StartChecker(self):
1418
1997
self.start_checker()
1420
1999
# Disable - method
2000
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1421
2001
@dbus.service.method(_interface)
1422
2002
def Disable(self):
1426
2006
# StopChecker - method
2007
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1427
2008
@dbus.service.method(_interface)
1428
2009
def StopChecker(self):
1429
2010
self.stop_checker()
1433
2014
# ApprovalPending - property
1434
2015
@dbus_service_property(_interface, signature="b", access="read")
1435
2016
def ApprovalPending_dbus_property(self):
1436
2017
return dbus.Boolean(bool(self.approvals_pending))
1438
2019
# ApprovedByDefault - property
1439
@dbus_service_property(_interface, signature="b",
2020
@dbus_service_property(_interface,
1440
2022
access="readwrite")
1441
2023
def ApprovedByDefault_dbus_property(self, value=None):
1442
2024
if value is None: # get
1443
2025
return dbus.Boolean(self.approved_by_default)
1444
2026
self.approved_by_default = bool(value)
1446
2028
# ApprovalDelay - property
1447
@dbus_service_property(_interface, signature="t",
2029
@dbus_service_property(_interface,
1448
2031
access="readwrite")
1449
2032
def ApprovalDelay_dbus_property(self, value=None):
1450
2033
if value is None: # get
1451
return dbus.UInt64(self.approval_delay_milliseconds())
2034
return dbus.UInt64(self.approval_delay.total_seconds()
1452
2036
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1454
2038
# ApprovalDuration - property
1455
@dbus_service_property(_interface, signature="t",
2039
@dbus_service_property(_interface,
1456
2041
access="readwrite")
1457
2042
def ApprovalDuration_dbus_property(self, value=None):
1458
2043
if value is None: # get
1459
return dbus.UInt64(timedelta_to_milliseconds(
1460
self.approval_duration))
2044
return dbus.UInt64(self.approval_duration.total_seconds()
1461
2046
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1463
2048
# Name - property
2050
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1464
2051
@dbus_service_property(_interface, signature="s", access="read")
1465
2052
def Name_dbus_property(self):
1466
2053
return dbus.String(self.name)
2057
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2058
@dbus_service_property(_interface, signature="s", access="read")
2059
def KeyID_dbus_property(self):
2060
return dbus.String(self.key_id)
1468
2062
# Fingerprint - property
2064
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1469
2065
@dbus_service_property(_interface, signature="s", access="read")
1470
2066
def Fingerprint_dbus_property(self):
1471
2067
return dbus.String(self.fingerprint)
1473
2069
# Host - property
1474
@dbus_service_property(_interface, signature="s",
2070
@dbus_service_property(_interface,
1475
2072
access="readwrite")
1476
2073
def Host_dbus_property(self, value=None):
1477
2074
if value is None: # get
1478
2075
return dbus.String(self.host)
1479
self.host = unicode(value)
2076
self.host = str(value)
1481
2078
# Created - property
2080
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1482
2081
@dbus_service_property(_interface, signature="s", access="read")
1483
2082
def Created_dbus_property(self):
1484
2083
return datetime_to_dbus(self.created)
1486
2085
# LastEnabled - property
1487
2086
@dbus_service_property(_interface, signature="s", access="read")
1488
2087
def LastEnabled_dbus_property(self):
1489
2088
return datetime_to_dbus(self.last_enabled)
1491
2090
# Enabled - property
1492
@dbus_service_property(_interface, signature="b",
2091
@dbus_service_property(_interface,
1493
2093
access="readwrite")
1494
2094
def Enabled_dbus_property(self, value=None):
1495
2095
if value is None: # get
1543
2144
if (getattr(self, "disable_initiator_tag", None)
1546
gobject.source_remove(self.disable_initiator_tag)
1547
self.disable_initiator_tag = (
1548
gobject.timeout_add(
1549
timedelta_to_milliseconds(self.expires - now),
2147
GLib.source_remove(self.disable_initiator_tag)
2148
self.disable_initiator_tag = GLib.timeout_add(
2149
int((self.expires - now).total_seconds() * 1000),
1552
2152
# ExtendedTimeout - property
1553
@dbus_service_property(_interface, signature="t",
2153
@dbus_service_property(_interface,
1554
2155
access="readwrite")
1555
2156
def ExtendedTimeout_dbus_property(self, value=None):
1556
2157
if value is None: # get
1557
return dbus.UInt64(self.extended_timeout_milliseconds())
2158
return dbus.UInt64(self.extended_timeout.total_seconds()
1558
2160
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1560
2162
# Interval - property
1561
@dbus_service_property(_interface, signature="t",
2163
@dbus_service_property(_interface,
1562
2165
access="readwrite")
1563
2166
def Interval_dbus_property(self, value=None):
1564
2167
if value is None: # get
1565
return dbus.UInt64(self.interval_milliseconds())
2168
return dbus.UInt64(self.interval.total_seconds() * 1000)
1566
2169
self.interval = datetime.timedelta(0, 0, 0, value)
1567
2170
if getattr(self, "checker_initiator_tag", None) is None:
1569
2172
if self.enabled:
1570
2173
# Reschedule checker run
1571
gobject.source_remove(self.checker_initiator_tag)
1572
self.checker_initiator_tag = (gobject.timeout_add
1573
(value, self.start_checker))
1574
self.start_checker() # Start one now, too
2174
GLib.source_remove(self.checker_initiator_tag)
2175
self.checker_initiator_tag = GLib.timeout_add(
2176
value, self.start_checker)
2177
self.start_checker() # Start one now, too
1576
2179
# Checker - property
1577
@dbus_service_property(_interface, signature="s",
2180
@dbus_service_property(_interface,
1578
2182
access="readwrite")
1579
2183
def Checker_dbus_property(self, value=None):
1580
2184
if value is None: # get
1581
2185
return dbus.String(self.checker_command)
1582
self.checker_command = unicode(value)
2186
self.checker_command = str(value)
1584
2188
# CheckerRunning - property
1585
@dbus_service_property(_interface, signature="b",
2189
@dbus_service_property(_interface,
1586
2191
access="readwrite")
1587
2192
def CheckerRunning_dbus_property(self, value=None):
1588
2193
if value is None: # get
1635
2250
class ClientHandler(socketserver.BaseRequestHandler, object):
1636
2251
"""A class to handle client connections.
1638
2253
Instantiated once for each connection to handle it.
1639
2254
Note: This will run in its own forked process."""
1641
2256
def handle(self):
1642
2257
with contextlib.closing(self.server.child_pipe) as child_pipe:
1643
2258
logger.info("TCP connection from: %s",
1644
unicode(self.client_address))
2259
str(self.client_address))
1645
2260
logger.debug("Pipe FD: %d",
1646
2261
self.server.child_pipe.fileno())
1648
session = (gnutls.connection
1649
.ClientSession(self.request,
1651
.X509Credentials()))
1653
# Note: gnutls.connection.X509Credentials is really a
1654
# generic GnuTLS certificate credentials object so long as
1655
# no X.509 keys are added to it. Therefore, we can use it
1656
# here despite using OpenPGP certificates.
1658
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1659
# "+AES-256-CBC", "+SHA1",
1660
# "+COMP-NULL", "+CTYPE-OPENPGP",
2263
session = gnutls.ClientSession(self.request)
2265
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2266
# "+AES-256-CBC", "+SHA1",
2267
# "+COMP-NULL", "+CTYPE-OPENPGP",
1662
2269
# Use a fallback default, since this MUST be set.
1663
2270
priority = self.server.gnutls_priority
1664
2271
if priority is None:
1665
2272
priority = "NORMAL"
1666
(gnutls.library.functions
1667
.gnutls_priority_set_direct(session._c_object,
2273
gnutls.priority_set_direct(session._c_object,
2274
priority.encode("utf-8"),
1670
2277
# Start communication using the Mandos protocol
1671
2278
# Get protocol number
1672
2279
line = self.request.makefile().readline()
1673
2280
logger.debug("Protocol version: %r", line)
1675
2282
if int(line.strip().split()[0]) > 1:
2283
raise RuntimeError(line)
1677
2284
except (ValueError, IndexError, RuntimeError) as error:
1678
2285
logger.error("Unknown protocol version: %s", error)
1681
2288
# Start GnuTLS connection
1683
2290
session.handshake()
1684
except gnutls.errors.GNUTLSError as error:
2291
except gnutls.Error as error:
1685
2292
logger.warning("Handshake failed: %s", error)
1686
2293
# Do not run session.bye() here: the session is not
1687
2294
# established. Just abandon the request.
1689
2296
logger.debug("Handshake succeeded")
1691
2298
approval_required = False
1694
fpr = self.fingerprint(self.peer_certificate
1697
gnutls.errors.GNUTLSError) as error:
1698
logger.warning("Bad certificate: %s", error)
1700
logger.debug("Fingerprint: %s", fpr)
1703
client = ProxyClient(child_pipe, fpr,
2300
if gnutls.has_rawpk:
2303
key_id = self.key_id(
2304
self.peer_certificate(session))
2305
except (TypeError, gnutls.Error) as error:
2306
logger.warning("Bad certificate: %s", error)
2308
logger.debug("Key ID: %s", key_id)
2313
fpr = self.fingerprint(
2314
self.peer_certificate(session))
2315
except (TypeError, gnutls.Error) as error:
2316
logger.warning("Bad certificate: %s", error)
2318
logger.debug("Fingerprint: %s", fpr)
2321
client = ProxyClient(child_pipe, key_id, fpr,
1704
2322
self.client_address)
1705
2323
except KeyError:
1708
2326
if client.approval_delay:
1709
2327
delay = client.approval_delay
1710
2328
client.approvals_pending += 1
1711
2329
approval_required = True
1714
2332
if not client.enabled:
1715
2333
logger.info("Client %s is disabled",
1717
2335
if self.server.use_dbus:
1718
2336
# Emit D-Bus signal
1719
2337
client.Rejected("Disabled")
1722
2340
if client.approved or not client.approval_delay:
1723
#We are approved or approval is disabled
2341
# We are approved or approval is disabled
1725
2343
elif client.approved is None:
1726
2344
logger.info("Client %s needs approval",
1761
2377
delay -= time2 - time
1764
while sent_size < len(client.secret):
1766
sent = session.send(client.secret[sent_size:])
1767
except gnutls.errors.GNUTLSError as error:
1768
logger.warning("gnutls send failed",
1771
logger.debug("Sent: %d, remaining: %d",
1772
sent, len(client.secret)
1773
- (sent_size + sent))
2380
session.send(client.secret)
2381
except gnutls.Error as error:
2382
logger.warning("gnutls send failed",
1776
2386
logger.info("Sending secret to %s", client.name)
1777
2387
# bump the timeout using extended_timeout
1778
2388
client.bump_timeout(client.extended_timeout)
1779
2389
if self.server.use_dbus:
1780
2390
# Emit D-Bus signal
1781
2391
client.GotSecret()
1784
2394
if approval_required:
1785
2395
client.approvals_pending -= 1
1788
except gnutls.errors.GNUTLSError as error:
2398
except gnutls.Error as error:
1789
2399
logger.warning("GnuTLS bye failed",
1790
2400
exc_info=error)
1793
2403
def peer_certificate(session):
1794
"Return the peer's OpenPGP certificate as a bytestring"
1795
# If not an OpenPGP certificate...
1796
if (gnutls.library.functions
1797
.gnutls_certificate_type_get(session._c_object)
1798
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1799
# ...do the normal thing
1800
return session.peer_certificate
2404
"Return the peer's certificate as a bytestring"
2406
cert_type = gnutls.certificate_type_get2(session._c_object,
2408
except AttributeError:
2409
cert_type = gnutls.certificate_type_get(session._c_object)
2410
if gnutls.has_rawpk:
2411
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2413
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2414
# If not a valid certificate type...
2415
if cert_type not in valid_cert_types:
2416
logger.info("Cert type %r not in %r", cert_type,
2418
# ...return invalid data
1801
2420
list_size = ctypes.c_uint(1)
1802
cert_list = (gnutls.library.functions
1803
.gnutls_certificate_get_peers
2421
cert_list = (gnutls.certificate_get_peers
1804
2422
(session._c_object, ctypes.byref(list_size)))
1805
2423
if not bool(cert_list) and list_size.value != 0:
1806
raise gnutls.errors.GNUTLSError("error getting peer"
2424
raise gnutls.Error("error getting peer certificate")
1808
2425
if list_size.value == 0:
1810
2427
cert = cert_list[0]
1811
2428
return ctypes.string_at(cert.data, cert.size)
2431
def key_id(certificate):
2432
"Convert a certificate bytestring to a hexdigit key ID"
2433
# New GnuTLS "datum" with the public key
2434
datum = gnutls.datum_t(
2435
ctypes.cast(ctypes.c_char_p(certificate),
2436
ctypes.POINTER(ctypes.c_ubyte)),
2437
ctypes.c_uint(len(certificate)))
2438
# XXX all these need to be created in the gnutls "module"
2439
# New empty GnuTLS certificate
2440
pubkey = gnutls.pubkey_t()
2441
gnutls.pubkey_init(ctypes.byref(pubkey))
2442
# Import the raw public key into the certificate
2443
gnutls.pubkey_import(pubkey,
2444
ctypes.byref(datum),
2445
gnutls.X509_FMT_DER)
2446
# New buffer for the key ID
2447
buf = ctypes.create_string_buffer(32)
2448
buf_len = ctypes.c_size_t(len(buf))
2449
# Get the key ID from the raw public key into the buffer
2450
gnutls.pubkey_get_key_id(pubkey,
2451
gnutls.KEYID_USE_SHA256,
2452
ctypes.cast(ctypes.byref(buf),
2453
ctypes.POINTER(ctypes.c_ubyte)),
2454
ctypes.byref(buf_len))
2455
# Deinit the certificate
2456
gnutls.pubkey_deinit(pubkey)
2458
# Convert the buffer to a Python bytestring
2459
key_id = ctypes.string_at(buf, buf_len.value)
2460
# Convert the bytestring to hexadecimal notation
2461
hex_key_id = binascii.hexlify(key_id).upper()
1814
2465
def fingerprint(openpgp):
1815
2466
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1816
2467
# New GnuTLS "datum" with the OpenPGP public key
1817
datum = (gnutls.library.types
1818
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1821
ctypes.c_uint(len(openpgp))))
2468
datum = gnutls.datum_t(
2469
ctypes.cast(ctypes.c_char_p(openpgp),
2470
ctypes.POINTER(ctypes.c_ubyte)),
2471
ctypes.c_uint(len(openpgp)))
1822
2472
# New empty GnuTLS certificate
1823
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1824
(gnutls.library.functions
1825
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2473
crt = gnutls.openpgp_crt_t()
2474
gnutls.openpgp_crt_init(ctypes.byref(crt))
1826
2475
# Import the OpenPGP public key into the certificate
1827
(gnutls.library.functions
1828
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1829
gnutls.library.constants
1830
.GNUTLS_OPENPGP_FMT_RAW))
2476
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2477
gnutls.OPENPGP_FMT_RAW)
1831
2478
# Verify the self signature in the key
1832
2479
crtverify = ctypes.c_uint()
1833
(gnutls.library.functions
1834
.gnutls_openpgp_crt_verify_self(crt, 0,
1835
ctypes.byref(crtverify)))
2480
gnutls.openpgp_crt_verify_self(crt, 0,
2481
ctypes.byref(crtverify))
1836
2482
if crtverify.value != 0:
1837
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1838
raise (gnutls.errors.CertificateSecurityError
2483
gnutls.openpgp_crt_deinit(crt)
2484
raise gnutls.CertificateSecurityError(code
1840
2486
# New buffer for the fingerprint
1841
2487
buf = ctypes.create_string_buffer(20)
1842
2488
buf_len = ctypes.c_size_t()
1843
2489
# Get the fingerprint from the certificate into the buffer
1844
(gnutls.library.functions
1845
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1846
ctypes.byref(buf_len)))
2490
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2491
ctypes.byref(buf_len))
1847
2492
# Deinit the certificate
1848
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2493
gnutls.openpgp_crt_deinit(crt)
1849
2494
# Convert the buffer to a Python bytestring
1850
2495
fpr = ctypes.string_at(buf, buf_len.value)
1851
2496
# Convert the bytestring to hexadecimal notation
1856
2501
class MultiprocessingMixIn(object):
1857
2502
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1858
2504
def sub_process_main(self, request, address):
1860
2506
self.finish_request(request, address)
1861
2507
except Exception:
1862
2508
self.handle_error(request, address)
1863
2509
self.close_request(request)
1865
2511
def process_request(self, request, address):
1866
2512
"""Start a new process to process the request."""
1867
proc = multiprocessing.Process(target = self.sub_process_main,
1868
args = (request, address))
2513
proc = multiprocessing.Process(target=self.sub_process_main,
2514
args=(request, address))
1873
2519
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1874
2520
""" adds a pipe to the MixIn """
1875
2522
def process_request(self, request, client_address):
1876
2523
"""Overrides and wraps the original process_request().
1878
2525
This function creates a new pipe in self.pipe
1880
2527
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1882
2529
proc = MultiprocessingMixIn.process_request(self, request,
1883
2530
client_address)
1884
2531
self.child_pipe.close()
1885
2532
self.add_pipe(parent_pipe, proc)
1887
2534
def add_pipe(self, parent_pipe, proc):
1888
2535
"""Dummy function; override as necessary"""
1889
raise NotImplementedError
2536
raise NotImplementedError()
1892
2539
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1893
2540
socketserver.TCPServer, object):
1894
2541
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1897
2544
enabled: Boolean; whether this server is activated yet
1898
2545
interface: None or a network interface name (string)
1899
2546
use_ipv6: Boolean; to use IPv6 or not
1901
2549
def __init__(self, server_address, RequestHandlerClass,
1902
interface=None, use_ipv6=True):
2553
"""If socketfd is set, use that file descriptor instead of
2554
creating a new one with socket.socket().
1903
2556
self.interface = interface
1905
2558
self.address_family = socket.AF_INET6
2559
if socketfd is not None:
2560
# Save the file descriptor
2561
self.socketfd = socketfd
2562
# Save the original socket.socket() function
2563
self.socket_socket = socket.socket
2565
# To implement --socket, we monkey patch socket.socket.
2567
# (When socketserver.TCPServer is a new-style class, we
2568
# could make self.socket into a property instead of monkey
2569
# patching socket.socket.)
2571
# Create a one-time-only replacement for socket.socket()
2572
@functools.wraps(socket.socket)
2573
def socket_wrapper(*args, **kwargs):
2574
# Restore original function so subsequent calls are
2576
socket.socket = self.socket_socket
2577
del self.socket_socket
2578
# This time only, return a new socket object from the
2579
# saved file descriptor.
2580
return socket.fromfd(self.socketfd, *args, **kwargs)
2581
# Replace socket.socket() function with wrapper
2582
socket.socket = socket_wrapper
2583
# The socketserver.TCPServer.__init__ will call
2584
# socket.socket(), which might be our replacement,
2585
# socket_wrapper(), if socketfd was set.
1906
2586
socketserver.TCPServer.__init__(self, server_address,
1907
2587
RequestHandlerClass)
1908
2589
def server_bind(self):
1909
2590
"""This overrides the normal server_bind() function
1910
2591
to bind to an interface if one was specified, and also NOT to
1911
2592
bind to an address or port if they were not specified."""
2593
global SO_BINDTODEVICE
1912
2594
if self.interface is not None:
1913
2595
if SO_BINDTODEVICE is None:
1914
logger.error("SO_BINDTODEVICE does not exist;"
1915
" cannot bind to interface %s",
1919
self.socket.setsockopt(socket.SOL_SOCKET,
1923
except socket.error as error:
1924
if error.errno == errno.EPERM:
1925
logger.error("No permission to"
1926
" bind to interface %s",
1928
elif error.errno == errno.ENOPROTOOPT:
1929
logger.error("SO_BINDTODEVICE not available;"
1930
" cannot bind to interface %s",
1932
elif error.errno == errno.ENODEV:
1933
logger.error("Interface %s does not"
1934
" exist, cannot bind",
2596
# Fall back to a hard-coded value which seems to be
2598
logger.warning("SO_BINDTODEVICE not found, trying 25")
2599
SO_BINDTODEVICE = 25
2601
self.socket.setsockopt(
2602
socket.SOL_SOCKET, SO_BINDTODEVICE,
2603
(self.interface + "\0").encode("utf-8"))
2604
except socket.error as error:
2605
if error.errno == errno.EPERM:
2606
logger.error("No permission to bind to"
2607
" interface %s", self.interface)
2608
elif error.errno == errno.ENOPROTOOPT:
2609
logger.error("SO_BINDTODEVICE not available;"
2610
" cannot bind to interface %s",
2612
elif error.errno == errno.ENODEV:
2613
logger.error("Interface %s does not exist,"
2614
" cannot bind", self.interface)
1938
2617
# Only bind(2) the socket if we really need to.
1939
2618
if self.server_address[0] or self.server_address[1]:
1940
2619
if not self.server_address[0]:
1941
2620
if self.address_family == socket.AF_INET6:
1942
any_address = "::" # in6addr_any
2621
any_address = "::" # in6addr_any
1944
any_address = socket.INADDR_ANY
2623
any_address = "0.0.0.0" # INADDR_ANY
1945
2624
self.server_address = (any_address,
1946
2625
self.server_address[1])
1947
2626
elif not self.server_address[1]:
1948
self.server_address = (self.server_address[0],
2627
self.server_address = (self.server_address[0], 0)
1950
2628
# if self.interface:
1951
2629
# self.server_address = (self.server_address[0],
1977
2660
self.gnutls_priority = gnutls_priority
1978
2661
IPv6_TCPServer.__init__(self, server_address,
1979
2662
RequestHandlerClass,
1980
interface = interface,
1981
use_ipv6 = use_ipv6)
2663
interface=interface,
1982
2667
def server_activate(self):
1983
2668
if self.enabled:
1984
2669
return socketserver.TCPServer.server_activate(self)
1986
2671
def enable(self):
1987
2672
self.enabled = True
1989
2674
def add_pipe(self, parent_pipe, proc):
1990
2675
# Call "handle_ipc" for both data and EOF events
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):
2677
parent_pipe.fileno(),
2678
GLib.IO_IN | GLib.IO_HUP,
2679
functools.partial(self.handle_ipc,
2680
parent_pipe=parent_pipe,
2683
def handle_ipc(self, source, condition,
2686
client_object=None):
2000
2687
# error, or the other end of multiprocessing.Pipe has closed
2001
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2688
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2002
2689
# Wait for other process to exit
2006
2693
# Read a request from the child
2007
2694
request = parent_pipe.recv()
2008
2695
command = request[0]
2010
2697
if command == 'init':
2012
address = request[2]
2014
for c in self.clients.itervalues():
2015
if c.fingerprint == fpr:
2698
key_id = request[1].decode("ascii")
2699
fpr = request[2].decode("ascii")
2700
address = request[3]
2702
for c in self.clients.values():
2703
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2705
if key_id and c.key_id == key_id:
2708
if fpr and c.fingerprint == fpr:
2019
logger.info("Client not found for fingerprint: %s, ad"
2020
"dress: %s", fpr, address)
2712
logger.info("Client not found for key ID: %s, address"
2713
": %s", key_id or fpr, address)
2021
2714
if self.use_dbus:
2022
2715
# Emit D-Bus signal
2023
mandos_dbus_service.ClientNotFound(fpr,
2716
mandos_dbus_service.ClientNotFound(key_id or fpr,
2025
2718
parent_pipe.send(False)
2028
gobject.io_add_watch(parent_pipe.fileno(),
2029
gobject.IO_IN | gobject.IO_HUP,
2030
functools.partial(self.handle_ipc,
2722
parent_pipe.fileno(),
2723
GLib.IO_IN | GLib.IO_HUP,
2724
functools.partial(self.handle_ipc,
2725
parent_pipe=parent_pipe,
2727
client_object=client))
2036
2728
parent_pipe.send(True)
2037
2729
# remove the old hook in favor of the new above hook on
2041
2733
funcname = request[1]
2042
2734
args = request[2]
2043
2735
kwargs = request[3]
2045
2737
parent_pipe.send(('data', getattr(client_object,
2046
2738
funcname)(*args,
2049
2741
if command == 'getattr':
2050
2742
attrname = request[1]
2051
if callable(client_object.__getattribute__(attrname)):
2052
parent_pipe.send(('function',))
2743
if isinstance(client_object.__getattribute__(attrname),
2744
collections.Callable):
2745
parent_pipe.send(('function', ))
2054
parent_pipe.send(('data', client_object
2055
.__getattribute__(attrname)))
2748
'data', client_object.__getattribute__(attrname)))
2057
2750
if command == 'setattr':
2058
2751
attrname = request[1]
2059
2752
value = request[2]
2060
2753
setattr(client_object, attrname, value)
2758
def rfc3339_duration_to_delta(duration):
2759
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2761
>>> rfc3339_duration_to_delta("P7D")
2762
datetime.timedelta(7)
2763
>>> rfc3339_duration_to_delta("PT60S")
2764
datetime.timedelta(0, 60)
2765
>>> rfc3339_duration_to_delta("PT60M")
2766
datetime.timedelta(0, 3600)
2767
>>> rfc3339_duration_to_delta("PT24H")
2768
datetime.timedelta(1)
2769
>>> rfc3339_duration_to_delta("P1W")
2770
datetime.timedelta(7)
2771
>>> rfc3339_duration_to_delta("PT5M30S")
2772
datetime.timedelta(0, 330)
2773
>>> rfc3339_duration_to_delta("P1DT3M20S")
2774
datetime.timedelta(1, 200)
2777
# Parsing an RFC 3339 duration with regular expressions is not
2778
# possible - there would have to be multiple places for the same
2779
# values, like seconds. The current code, while more esoteric, is
2780
# cleaner without depending on a parsing library. If Python had a
2781
# built-in library for parsing we would use it, but we'd like to
2782
# avoid excessive use of external libraries.
2784
# New type for defining tokens, syntax, and semantics all-in-one
2785
Token = collections.namedtuple("Token", (
2786
"regexp", # To match token; if "value" is not None, must have
2787
# a "group" containing digits
2788
"value", # datetime.timedelta or None
2789
"followers")) # Tokens valid after this token
2790
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2791
# the "duration" ABNF definition in RFC 3339, Appendix A.
2792
token_end = Token(re.compile(r"$"), None, frozenset())
2793
token_second = Token(re.compile(r"(\d+)S"),
2794
datetime.timedelta(seconds=1),
2795
frozenset((token_end, )))
2796
token_minute = Token(re.compile(r"(\d+)M"),
2797
datetime.timedelta(minutes=1),
2798
frozenset((token_second, token_end)))
2799
token_hour = Token(re.compile(r"(\d+)H"),
2800
datetime.timedelta(hours=1),
2801
frozenset((token_minute, token_end)))
2802
token_time = Token(re.compile(r"T"),
2804
frozenset((token_hour, token_minute,
2806
token_day = Token(re.compile(r"(\d+)D"),
2807
datetime.timedelta(days=1),
2808
frozenset((token_time, token_end)))
2809
token_month = Token(re.compile(r"(\d+)M"),
2810
datetime.timedelta(weeks=4),
2811
frozenset((token_day, token_end)))
2812
token_year = Token(re.compile(r"(\d+)Y"),
2813
datetime.timedelta(weeks=52),
2814
frozenset((token_month, token_end)))
2815
token_week = Token(re.compile(r"(\d+)W"),
2816
datetime.timedelta(weeks=1),
2817
frozenset((token_end, )))
2818
token_duration = Token(re.compile(r"P"), None,
2819
frozenset((token_year, token_month,
2820
token_day, token_time,
2822
# Define starting values:
2824
value = datetime.timedelta()
2826
# Following valid tokens
2827
followers = frozenset((token_duration, ))
2828
# String left to parse
2830
# Loop until end token is found
2831
while found_token is not token_end:
2832
# Search for any currently valid tokens
2833
for token in followers:
2834
match = token.regexp.match(s)
2835
if match is not None:
2837
if token.value is not None:
2838
# Value found, parse digits
2839
factor = int(match.group(1), 10)
2840
# Add to value so far
2841
value += factor * token.value
2842
# Strip token from string
2843
s = token.regexp.sub("", s, 1)
2846
# Set valid next tokens
2847
followers = found_token.followers
2850
# No currently valid tokens were found
2851
raise ValueError("Invalid RFC 3339 duration: {!r}"
2065
2857
def string_to_delta(interval):
2066
2858
"""Parse a string and return a datetime.timedelta
2068
2860
>>> string_to_delta('7d')
2069
2861
datetime.timedelta(7)
2070
2862
>>> string_to_delta('60s')
2160
2957
parser.add_argument("--no-dbus", action="store_false",
2161
2958
dest="use_dbus", help="Do not provide D-Bus"
2162
" system bus interface")
2959
" system bus interface", default=None)
2163
2960
parser.add_argument("--no-ipv6", action="store_false",
2164
dest="use_ipv6", help="Do not use IPv6")
2961
dest="use_ipv6", help="Do not use IPv6",
2165
2963
parser.add_argument("--no-restore", action="store_false",
2166
2964
dest="restore", help="Do not restore stored"
2965
" state", default=None)
2966
parser.add_argument("--socket", type=int,
2967
help="Specify a file descriptor to a network"
2968
" socket to use instead of creating one")
2168
2969
parser.add_argument("--statedir", metavar="DIR",
2169
2970
help="Directory to save/restore state in")
2971
parser.add_argument("--foreground", action="store_true",
2972
help="Run in foreground", default=None)
2973
parser.add_argument("--no-zeroconf", action="store_false",
2974
dest="zeroconf", help="Do not use Zeroconf",
2171
2977
options = parser.parse_args()
2173
2979
if options.check:
2981
fail_count, test_count = doctest.testmod()
2982
sys.exit(os.EX_OK if fail_count == 0 else 1)
2178
2984
# Default values for config file for server-global settings
2179
server_defaults = { "interface": "",
2184
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2185
"servicename": "Mandos",
2190
"statedir": "/var/lib/mandos"
2985
if gnutls.has_rawpk:
2986
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2987
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2989
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2990
":+SIGN-DSA-SHA256")
2991
server_defaults = {"interface": "",
2995
"priority": priority,
2996
"servicename": "Mandos",
3002
"statedir": "/var/lib/mandos",
3003
"foreground": "False",
2193
3008
# Parse config file for server-global settings
2194
3009
server_config = configparser.SafeConfigParser(server_defaults)
2195
3010
del server_defaults
2196
server_config.read(os.path.join(options.configdir,
3011
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2198
3012
# Convert the SafeConfigParser object to a dict
2199
3013
server_settings = server_config.defaults()
2200
3014
# Use the appropriate methods on the non-string config options
2201
for option in ("debug", "use_dbus", "use_ipv6"):
3015
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3016
"foreground", "zeroconf"):
2202
3017
server_settings[option] = server_config.getboolean("DEFAULT",
2204
3019
if server_settings["port"]:
2205
3020
server_settings["port"] = server_config.getint("DEFAULT",
3022
if server_settings["socket"]:
3023
server_settings["socket"] = server_config.getint("DEFAULT",
3025
# Later, stdin will, and stdout and stderr might, be dup'ed
3026
# over with an opened os.devnull. But we don't want this to
3027
# happen with a supplied network socket.
3028
if 0 <= server_settings["socket"] <= 2:
3029
server_settings["socket"] = os.dup(server_settings
2207
3031
del server_config
2209
3033
# Override the settings from the config file with command line
2210
3034
# options, if set.
2211
3035
for option in ("interface", "address", "port", "debug",
2212
"priority", "servicename", "configdir",
2213
"use_dbus", "use_ipv6", "debuglevel", "restore",
3036
"priority", "servicename", "configdir", "use_dbus",
3037
"use_ipv6", "debuglevel", "restore", "statedir",
3038
"socket", "foreground", "zeroconf"):
2215
3039
value = getattr(options, option)
2216
3040
if value is not None:
2217
3041
server_settings[option] = value
2219
3043
# Force all strings to be unicode
2220
3044
for option in server_settings.keys():
2221
if type(server_settings[option]) is str:
2222
server_settings[option] = unicode(server_settings[option])
3045
if isinstance(server_settings[option], bytes):
3046
server_settings[option] = (server_settings[option]
3048
# Force all boolean options to be boolean
3049
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3050
"foreground", "zeroconf"):
3051
server_settings[option] = bool(server_settings[option])
3052
# Debug implies foreground
3053
if server_settings["debug"]:
3054
server_settings["foreground"] = True
2223
3055
# Now we have our good server settings in "server_settings"
2225
3057
##################################################################
3059
if (not server_settings["zeroconf"]
3060
and not (server_settings["port"]
3061
or server_settings["socket"] != "")):
3062
parser.error("Needs port or socket to work without Zeroconf")
2227
3064
# For convenience
2228
3065
debug = server_settings["debug"]
2229
3066
debuglevel = server_settings["debuglevel"]
3136
logger.debug("Did setuid/setgid to {}:{}".format(uid,
2290
3138
except OSError as error:
3139
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3140
.format(uid, gid, os.strerror(error.errno)))
2291
3141
if error.errno != errno.EPERM:
2295
3145
# Enable all possible GnuTLS debugging
2297
3147
# "Use a log level over 10 to enable all debugging options."
2298
3148
# - GnuTLS manual
2299
gnutls.library.functions.gnutls_global_set_log_level(11)
2301
@gnutls.library.types.gnutls_log_func
3149
gnutls.global_set_log_level(11)
2302
3152
def debug_gnutls(level, string):
2303
3153
logger.debug("GnuTLS: %s", string[:-1])
2305
(gnutls.library.functions
2306
.gnutls_global_set_log_function(debug_gnutls))
3155
gnutls.global_set_log_function(debug_gnutls)
2308
3157
# Redirect stdin so all checkers get /dev/null
2309
3158
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2310
3159
os.dup2(null, sys.stdin.fileno())
2314
3163
# Need to fork before connecting to D-Bus
2316
3165
# Close all input and output, do double fork, etc.
2319
gobject.threads_init()
3168
# multiprocessing will use threads, so before we use GLib we need
3169
# to inform GLib that threads will be used.
2321
3172
global main_loop
2322
3173
# From the Avahi example code
2323
3174
DBusGMainLoop(set_as_default=True)
2324
main_loop = gobject.MainLoop()
3175
main_loop = GLib.MainLoop()
2325
3176
bus = dbus.SystemBus()
2326
3177
# End of Avahi example code
2329
3180
bus_name = dbus.service.BusName("se.recompile.Mandos",
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:
3183
old_bus_name = dbus.service.BusName(
3184
"se.bsnet.fukt.Mandos", bus,
3186
except dbus.exceptions.DBusException as e:
2335
3187
logger.error("Disabling D-Bus:", exc_info=e)
2336
3188
use_dbus = False
2337
3189
server_settings["use_dbus"] = False
2338
3190
tcp_server.use_dbus = False
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"])))
3192
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3193
service = AvahiServiceToSyslog(
3194
name=server_settings["servicename"],
3195
servicetype="_mandos._tcp",
3198
if server_settings["interface"]:
3199
service.interface = if_nametoindex(
3200
server_settings["interface"].encode("utf-8"))
2348
3202
global multiprocessing_manager
2349
3203
multiprocessing_manager = multiprocessing.Manager()
2351
3205
client_class = Client
2353
client_class = functools.partial(ClientDBus, bus = bus)
3207
client_class = functools.partial(ClientDBus, bus=bus)
2355
3209
client_settings = Client.config_parser(client_config)
2356
3210
old_client_settings = {}
2357
3211
clients_data = {}
3213
# This is used to redirect stdout and stderr for checker processes
3215
wnull = open(os.devnull, "w") # A writable /dev/null
3216
# Only used if server is running in foreground but not in debug
3218
if debug or not foreground:
2359
3221
# Get client data and settings from last running state.
2360
3222
if server_settings["restore"]:
2362
3224
with open(stored_state_path, "rb") as stored_state:
2363
clients_data, old_client_settings = (pickle.load
3225
if sys.version_info.major == 2:
3226
clients_data, old_client_settings = pickle.load(
3229
bytes_clients_data, bytes_old_client_settings = (
3230
pickle.load(stored_state, encoding="bytes"))
3231
# Fix bytes to strings
3234
clients_data = {(key.decode("utf-8")
3235
if isinstance(key, bytes)
3238
bytes_clients_data.items()}
3239
del bytes_clients_data
3240
for key in clients_data:
3241
value = {(k.decode("utf-8")
3242
if isinstance(k, bytes) else k): v
3244
clients_data[key].items()}
3245
clients_data[key] = value
3247
value["client_structure"] = [
3249
if isinstance(s, bytes)
3251
value["client_structure"]]
3253
for k in ("name", "host"):
3254
if isinstance(value[k], bytes):
3255
value[k] = value[k].decode("utf-8")
3256
if not value.has_key("key_id"):
3257
value["key_id"] = ""
3258
elif not value.has_key("fingerprint"):
3259
value["fingerprint"] = ""
3260
# old_client_settings
3262
old_client_settings = {
3263
(key.decode("utf-8")
3264
if isinstance(key, bytes)
3267
bytes_old_client_settings.items()}
3268
del bytes_old_client_settings
3270
for value in old_client_settings.values():
3271
if isinstance(value["host"], bytes):
3272
value["host"] = (value["host"]
2365
3274
os.remove(stored_state_path)
2366
3275
except IOError as e:
2367
3276
if e.errno == errno.ENOENT:
2368
logger.warning("Could not load persistent state: {0}"
2369
.format(os.strerror(e.errno)))
3277
logger.warning("Could not load persistent state:"
3278
" {}".format(os.strerror(e.errno)))
2371
3280
logger.critical("Could not load persistent state:",
2374
3283
except EOFError as e:
2375
3284
logger.warning("Could not load persistent state: "
2376
"EOFError:", exc_info=e)
2378
3288
with PGPEngine() as pgp:
2379
for client_name, client in clients_data.iteritems():
3289
for client_name, client in clients_data.items():
3290
# Skip removed clients
3291
if client_name not in client_settings:
2380
3294
# Decide which value to use after restoring saved state.
2381
3295
# We have three different values: Old config file,
2382
3296
# new config file, and saved state.
2440
3354
for client_name in (set(client_settings)
2441
3355
- set(old_client_settings)):
2442
3356
clients_data[client_name] = client_settings[client_name]
2444
3358
# Create all client objects
2445
for client_name, client in clients_data.iteritems():
3359
for client_name, client in clients_data.items():
2446
3360
tcp_server.clients[client_name] = client_class(
2447
name = client_name, settings = client)
3363
server_settings=server_settings)
2449
3365
if not tcp_server.clients:
2450
3366
logger.warning("No clients defined")
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
3369
if pidfile is not None:
3373
print(pid, file=pidfile)
3375
logger.error("Could not write to file %r with PID %d",
2464
3378
del pidfilename
2466
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2467
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3380
for termsig in (signal.SIGHUP, signal.SIGTERM):
3381
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3382
lambda: main_loop.quit() and False)
2470
@alternate_dbus_interfaces({"se.recompile.Mandos":
2471
"se.bsnet.fukt.Mandos"})
2472
class MandosDBusService(DBusObjectWithProperties):
3386
@alternate_dbus_interfaces(
3387
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3388
class MandosDBusService(DBusObjectWithObjectManager):
2473
3389
"""A D-Bus proxy object"""
2474
3391
def __init__(self):
2475
3392
dbus.service.Object.__init__(self, bus, "/")
2476
3394
_interface = "se.recompile.Mandos"
2478
@dbus_interface_annotations(_interface)
2480
return { "org.freedesktop.DBus.Property"
2481
".EmitsChangedSignal":
2484
3396
@dbus.service.signal(_interface, signature="o")
2485
3397
def ClientAdded(self, objpath):
2489
3401
@dbus.service.signal(_interface, signature="ss")
2490
def ClientNotFound(self, fingerprint, address):
3402
def ClientNotFound(self, key_id, address):
3406
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2494
3408
@dbus.service.signal(_interface, signature="os")
2495
3409
def ClientRemoved(self, objpath, name):
3413
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2499
3415
@dbus.service.method(_interface, out_signature="ao")
2500
3416
def GetAllClients(self):
2502
return dbus.Array(c.dbus_object_path
2504
tcp_server.clients.itervalues())
3418
return dbus.Array(c.dbus_object_path for c in
3419
tcp_server.clients.values())
3421
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2506
3423
@dbus.service.method(_interface,
2507
3424
out_signature="a{oa{sv}}")
2508
3425
def GetAllClientsWithProperties(self):
2510
3427
return dbus.Dictionary(
2511
((c.dbus_object_path, c.GetAll(""))
2512
for c in tcp_server.clients.itervalues()),
3428
{c.dbus_object_path: c.GetAll(
3429
"se.recompile.Mandos.Client")
3430
for c in tcp_server.clients.values()},
2513
3431
signature="oa{sv}")
2515
3433
@dbus.service.method(_interface, in_signature="o")
2516
3434
def RemoveClient(self, object_path):
2518
for c in tcp_server.clients.itervalues():
3436
for c in tcp_server.clients.values():
2519
3437
if c.dbus_object_path == object_path:
2520
3438
del tcp_server.clients[c.name]
2521
3439
c.remove_from_connection()
2522
# Don't signal anything except ClientRemoved
3440
# Don't signal the disabling
2523
3441
c.disable(quiet=True)
2525
self.ClientRemoved(object_path, c.name)
3442
# Emit D-Bus signal for removal
3443
self.client_removed_signal(c)
2527
3445
raise KeyError(object_path)
3449
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3450
out_signature="a{oa{sa{sv}}}")
3451
def GetManagedObjects(self):
3453
return dbus.Dictionary(
3454
{client.dbus_object_path:
3456
{interface: client.GetAll(interface)
3458
client._get_all_interface_names()})
3459
for client in tcp_server.clients.values()})
3461
def client_added_signal(self, client):
3462
"""Send the new standard signal and the old signal"""
3464
# New standard signal
3465
self.InterfacesAdded(
3466
client.dbus_object_path,
3468
{interface: client.GetAll(interface)
3470
client._get_all_interface_names()}))
3472
self.ClientAdded(client.dbus_object_path)
3474
def client_removed_signal(self, client):
3475
"""Send the new standard signal and the old signal"""
3477
# New standard signal
3478
self.InterfacesRemoved(
3479
client.dbus_object_path,
3480
client._get_all_interface_names())
3482
self.ClientRemoved(client.dbus_object_path,
2531
3485
mandos_dbus_service = MandosDBusService()
3487
# Save modules to variables to exempt the modules from being
3488
# unloaded before the function registered with atexit() is run.
3489
mp = multiprocessing
2534
3493
"Cleanup function; run on exit"
2537
multiprocessing.active_children()
3497
mp.active_children()
2538
3499
if not (tcp_server.clients or client_settings):
2541
3502
# Store client before exiting. Secrets are encrypted with key
2542
3503
# based on what config file has. If config file is
2543
3504
# removed/edited, old secret will thus be unrecovable.
2545
3506
with PGPEngine() as pgp:
2546
for client in tcp_server.clients.itervalues():
3507
for client in tcp_server.clients.values():
2547
3508
key = client_settings[client.name]["secret"]
2548
3509
client.encrypted_secret = pgp.encrypt(client.secret,
2550
3511
client_dict = {}
2552
3513
# A list of attributes that can not be pickled
2554
exclude = set(("bus", "changedstate", "secret",
2556
for name, typ in (inspect.getmembers
2557
(dbus.service.Object)):
3515
exclude = {"bus", "changedstate", "secret",
3516
"checker", "server_settings"}
3517
for name, typ in inspect.getmembers(dbus.service
2558
3519
exclude.add(name)
2560
3521
client_dict["encrypted_secret"] = (client
2561
3522
.encrypted_secret)
2562
3523
for attr in client.client_structure:
2563
3524
if attr not in exclude:
2564
3525
client_dict[attr] = getattr(client, attr)
2566
3527
clients[client.name] = client_dict
2567
3528
del client_settings[client.name]["secret"]
2570
with (tempfile.NamedTemporaryFile
2571
(mode='wb', suffix=".pickle", prefix='clients-',
2572
dir=os.path.dirname(stored_state_path),
2573
delete=False)) as stored_state:
2574
pickle.dump((clients, client_settings), stored_state)
2575
tempname=stored_state.name
3531
with tempfile.NamedTemporaryFile(
3535
dir=os.path.dirname(stored_state_path),
3536
delete=False) as stored_state:
3537
pickle.dump((clients, client_settings), stored_state,
3539
tempname = stored_state.name
2576
3540
os.rename(tempname, stored_state_path)
2577
3541
except (IOError, OSError) as e: