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# -*- mode: python; coding: utf-8 -*-
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# Mandos server - give out binary blobs to connecting clients.
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# This program is partly derived from an example program for an Avahi
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# service publisher, downloaded from
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# <http://avahi.org/wiki/PythonPublishExample>. This includes the
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# methods "add", "remove", "server_state_changed",
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# "entry_group_state_changed", "cleanup", and "activate" in the
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# "AvahiService" class, and some lines in "main".
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# Everything else is
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# Copyright © 2008-2019 Teddy Hogeborn
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# Copyright © 2008-2019 Björn Påhlsson
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# This file is part of Mandos.
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# Mandos is free software: you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by
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# Copyright © 2008-2012 Teddy Hogeborn
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# Copyright © 2008-2012 Björn Påhlsson
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# Mandos is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
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# along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
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# Contact the authors at <mandos@recompile.se>.
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from __future__ import (division, absolute_import, print_function,
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from future_builtins import *
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from future_builtins import *
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import SocketServer as socketserver
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import SocketServer as socketserver
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import ConfigParser as configparser
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import gnutls.connection
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import gnutls.library.functions
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import gnutls.library.constants
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import gnutls.library.types
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import ConfigParser as configparser
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import cPickle as pickle
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import cPickle as pickle
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import multiprocessing
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import dbus.service
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from gi.repository import GLib
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from dbus.mainloop.glib import DBusGMainLoop
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import xml.dom.minidom
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# Try to find the value of SO_BINDTODEVICE:
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# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
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# newer, and it is also the most natural place for it:
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SO_BINDTODEVICE = socket.SO_BINDTODEVICE
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except AttributeError:
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# This is where SO_BINDTODEVICE was up to and including Python
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from IN import SO_BINDTODEVICE
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except ImportError:
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# In Python 2.7 it seems to have been removed entirely.
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# Try running the C preprocessor:
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cc = subprocess.Popen(["cc", "--language=c", "-E",
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE)
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stdout = cc.communicate(
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"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
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SO_BINDTODEVICE = int(stdout.splitlines()[-1])
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except (OSError, ValueError, IndexError):
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SO_BINDTODEVICE = None
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if sys.version_info.major == 2:
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SO_BINDTODEVICE = None
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stored_state_file = "clients.pickle"
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logger = logging.getLogger()
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syslogger = (logging.handlers.SysLogHandler
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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = str("/dev/log")))
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if_nametoindex = ctypes.cdll.LoadLibrary(
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ctypes.util.find_library("c")).if_nametoindex
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if_nametoindex = (ctypes.cdll.LoadLibrary
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(ctypes.util.find_library("c"))
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except (OSError, AttributeError):
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def if_nametoindex(interface):
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"Get an interface index the hard way, i.e. using fcntl()"
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SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
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with contextlib.closing(socket.socket()) as s:
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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
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struct.pack(b"16s16x", interface))
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interface_index = struct.unpack("I", ifreq[16:20])[0]
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struct.pack(str("16s16x"),
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interface_index = struct.unpack(str("I"),
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return interface_index
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def copy_function(func):
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"""Make a copy of a function"""
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if sys.version_info.major == 2:
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return types.FunctionType(func.func_code,
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return types.FunctionType(func.__code__,
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def initlogger(debug, level=logging.WARNING):
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"""init logger and add loglevel"""
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syslogger = (logging.handlers.SysLogHandler(
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facility=logging.handlers.SysLogHandler.LOG_DAEMON,
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syslogger.setFormatter(logging.Formatter
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('Mandos [%(process)d]: %(levelname)s:'
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logger.addHandler(syslogger)
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console = logging.StreamHandler()
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console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
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os.rmdir(self.tempdir)
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self.tempdir = None
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def password_encode(self, password):
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# Passphrase can not be empty and can not contain newlines or
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# NUL bytes. So we prefix it and hex encode it.
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encoded = b"mandos" + binascii.hexlify(password)
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if len(encoded) > 2048:
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# GnuPG can't handle long passwords, so encode differently
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encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
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.replace(b"\n", b"\\n")
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.replace(b"\0", b"\\x00"))
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return b"mandos" + binascii.hexlify(password)
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def encrypt(self, data, password):
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passphrase = self.password_encode(password)
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with tempfile.NamedTemporaryFile(
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dir=self.tempdir) as passfile:
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passfile.write(passphrase)
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proc = subprocess.Popen([self.gpg, '--symmetric',
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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ciphertext, err = proc.communicate(input=data)
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if proc.returncode != 0:
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self.gnupg.passphrase = self.password_encode(password)
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with open(os.devnull, "w") as devnull:
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proc = self.gnupg.run(['--symmetric'],
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create_fhs=['stdin', 'stdout'],
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attach_fhs={'stderr': devnull})
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with contextlib.closing(proc.handles['stdin']) as f:
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with contextlib.closing(proc.handles['stdout']) as f:
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ciphertext = f.read()
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self.gnupg.passphrase = None
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return ciphertext
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def decrypt(self, data, password):
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passphrase = self.password_encode(password)
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with tempfile.NamedTemporaryFile(
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dir=self.tempdir) as passfile:
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passfile.write(passphrase)
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proc = subprocess.Popen([self.gpg, '--decrypt',
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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decrypted_plaintext, err = proc.communicate(input=data)
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if proc.returncode != 0:
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self.gnupg.passphrase = self.password_encode(password)
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with open(os.devnull, "w") as devnull:
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proc = self.gnupg.run(['--decrypt'],
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create_fhs=['stdin', 'stdout'],
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attach_fhs={'stderr': devnull})
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with contextlib.closing(proc.handles['stdin']) as f:
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with contextlib.closing(proc.handles['stdout']) as f:
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decrypted_plaintext = f.read()
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self.gnupg.passphrase = None
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return decrypted_plaintext
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# Pretend that we have an Avahi module
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"""This isn't so much a class as it is a module-like namespace."""
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IF_UNSPEC = -1 # avahi-common/address.h
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PROTO_UNSPEC = -1 # avahi-common/address.h
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PROTO_INET = 0 # avahi-common/address.h
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PROTO_INET6 = 1 # avahi-common/address.h
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DBUS_NAME = "org.freedesktop.Avahi"
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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
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DBUS_PATH_SERVER = "/"
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def string_array_to_txt_array(t):
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return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
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for s in t), signature="ay")
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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
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SERVER_INVALID = 0 # avahi-common/defs.h
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SERVER_REGISTERING = 1 # avahi-common/defs.h
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SERVER_RUNNING = 2 # avahi-common/defs.h
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SERVER_COLLISION = 3 # avahi-common/defs.h
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SERVER_FAILURE = 4 # avahi-common/defs.h
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class AvahiError(Exception):
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def __init__(self, value, *args, **kwargs):
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self.value = value
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return super(AvahiError, self).__init__(value, *args,
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super(AvahiError, self).__init__(value, *args, **kwargs)
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def __unicode__(self):
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return unicode(repr(self.value))
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class AvahiServiceError(AvahiError):
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class AvahiGroupError(AvahiError):
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class AvahiService(object):
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"""An Avahi (Zeroconf) service.
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interface: integer; avahi.IF_UNSPEC or an interface index.
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Used to optionally bind to the specified interface.
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name: string; Example: 'Mandos'
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type: string; Example: '_mandos._tcp'.
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See <https://www.iana.org/assignments/service-names-port-numbers>
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See <http://www.dns-sd.org/ServiceTypes.html>
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port: integer; what port to announce
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TXT: list of strings; TXT record for the service
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domain: string; Domain to publish on, default to .local if empty.
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follow_name_owner_changes=True),
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avahi.DBUS_INTERFACE_SERVER)
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self.server.connect_to_signal("StateChanged",
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self.server_state_changed)
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self.server_state_changed)
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self.server_state_changed(self.server.GetState())
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class AvahiServiceToSyslog(AvahiService):
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def rename(self, *args, **kwargs):
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"""Add the new name to the syslog messages"""
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ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
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syslogger.setFormatter(logging.Formatter(
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'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
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ret = AvahiService.rename(self)
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syslogger.setFormatter(logging.Formatter
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('Mandos ({0}) [%(process)d]:'
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' %(levelname)s: %(message)s'
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# Pretend that we have a GnuTLS module
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class gnutls(object):
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"""This isn't so much a class as it is a module-like namespace."""
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library = ctypes.util.find_library("gnutls")
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library = ctypes.util.find_library("gnutls-deb0")
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_library = ctypes.cdll.LoadLibrary(library)
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# Unless otherwise indicated, the constants and types below are
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# all from the gnutls/gnutls.h C header file.
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E_NO_CERTIFICATE_FOUND = -49
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KEYID_USE_SHA256 = 1 # gnutls/x509.h
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OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
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class session_int(ctypes.Structure):
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session_t = ctypes.POINTER(session_int)
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class certificate_credentials_st(ctypes.Structure):
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certificate_credentials_t = ctypes.POINTER(
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certificate_credentials_st)
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certificate_type_t = ctypes.c_int
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class datum_t(ctypes.Structure):
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_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
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('size', ctypes.c_uint)]
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class openpgp_crt_int(ctypes.Structure):
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openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
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openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
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log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
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credentials_type_t = ctypes.c_int
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transport_ptr_t = ctypes.c_void_p
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close_request_t = ctypes.c_int
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class Error(Exception):
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def __init__(self, message=None, code=None, args=()):
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# Default usage is by a message string, but if a return
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# code is passed, convert it to a string with
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if message is None and code is not None:
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message = gnutls.strerror(code)
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return super(gnutls.Error, self).__init__(
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class CertificateSecurityError(Error):
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class Credentials(object):
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self._c_object = gnutls.certificate_credentials_t()
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gnutls.certificate_allocate_credentials(
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ctypes.byref(self._c_object))
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self.type = gnutls.CRD_CERTIFICATE
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gnutls.certificate_free_credentials(self._c_object)
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class ClientSession(object):
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def __init__(self, socket, credentials=None):
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self._c_object = gnutls.session_t()
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gnutls_flags = gnutls.CLIENT
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if gnutls.check_version("3.5.6"):
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gnutls_flags |= gnutls.NO_TICKETS
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gnutls_flags |= gnutls.ENABLE_RAWPK
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gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
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gnutls.set_default_priority(self._c_object)
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gnutls.transport_set_ptr(self._c_object, socket.fileno())
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gnutls.handshake_set_private_extensions(self._c_object,
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if credentials is None:
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credentials = gnutls.Credentials()
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gnutls.credentials_set(self._c_object, credentials.type,
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ctypes.cast(credentials._c_object,
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self.credentials = credentials
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gnutls.deinit(self._c_object)
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return gnutls.handshake(self._c_object)
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def send(self, data):
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data_len -= gnutls.record_send(self._c_object,
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return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
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# Error handling functions
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def _error_code(result):
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"""A function to raise exceptions on errors, suitable
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for the 'restype' attribute on ctypes functions"""
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if result == gnutls.E_NO_CERTIFICATE_FOUND:
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raise gnutls.CertificateSecurityError(code=result)
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raise gnutls.Error(code=result)
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def _retry_on_error(result, func, arguments):
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"""A function to retry on some errors, suitable
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for the 'errcheck' attribute on ctypes functions"""
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if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
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return _error_code(result)
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result = func(*arguments)
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# Unless otherwise indicated, the function declarations below are
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# all from the gnutls/gnutls.h C header file.
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priority_set_direct = _library.gnutls_priority_set_direct
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priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
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ctypes.POINTER(ctypes.c_char_p)]
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priority_set_direct.restype = _error_code
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init = _library.gnutls_init
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init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
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init.restype = _error_code
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set_default_priority = _library.gnutls_set_default_priority
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set_default_priority.argtypes = [session_t]
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set_default_priority.restype = _error_code
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record_send = _library.gnutls_record_send
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record_send.argtypes = [session_t, ctypes.c_void_p,
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record_send.restype = ctypes.c_ssize_t
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record_send.errcheck = _retry_on_error
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certificate_allocate_credentials = (
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_library.gnutls_certificate_allocate_credentials)
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certificate_allocate_credentials.argtypes = [
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ctypes.POINTER(certificate_credentials_t)]
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certificate_allocate_credentials.restype = _error_code
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certificate_free_credentials = (
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_library.gnutls_certificate_free_credentials)
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certificate_free_credentials.argtypes = [
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certificate_credentials_t]
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certificate_free_credentials.restype = None
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handshake_set_private_extensions = (
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_library.gnutls_handshake_set_private_extensions)
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handshake_set_private_extensions.argtypes = [session_t,
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handshake_set_private_extensions.restype = None
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credentials_set = _library.gnutls_credentials_set
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credentials_set.argtypes = [session_t, credentials_type_t,
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credentials_set.restype = _error_code
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strerror = _library.gnutls_strerror
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strerror.argtypes = [ctypes.c_int]
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strerror.restype = ctypes.c_char_p
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certificate_type_get = _library.gnutls_certificate_type_get
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certificate_type_get.argtypes = [session_t]
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certificate_type_get.restype = _error_code
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certificate_get_peers = _library.gnutls_certificate_get_peers
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certificate_get_peers.argtypes = [session_t,
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ctypes.POINTER(ctypes.c_uint)]
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certificate_get_peers.restype = ctypes.POINTER(datum_t)
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global_set_log_level = _library.gnutls_global_set_log_level
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global_set_log_level.argtypes = [ctypes.c_int]
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global_set_log_level.restype = None
706
global_set_log_function = _library.gnutls_global_set_log_function
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global_set_log_function.argtypes = [log_func]
708
global_set_log_function.restype = None
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deinit = _library.gnutls_deinit
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deinit.argtypes = [session_t]
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deinit.restype = None
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handshake = _library.gnutls_handshake
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handshake.argtypes = [session_t]
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handshake.restype = _error_code
717
handshake.errcheck = _retry_on_error
719
transport_set_ptr = _library.gnutls_transport_set_ptr
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transport_set_ptr.argtypes = [session_t, transport_ptr_t]
721
transport_set_ptr.restype = None
723
bye = _library.gnutls_bye
724
bye.argtypes = [session_t, close_request_t]
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bye.restype = _error_code
726
bye.errcheck = _retry_on_error
728
check_version = _library.gnutls_check_version
729
check_version.argtypes = [ctypes.c_char_p]
730
check_version.restype = ctypes.c_char_p
732
_need_version = b"3.3.0"
733
if check_version(_need_version) is None:
734
raise self.Error("Needs GnuTLS {} or later"
735
.format(_need_version))
737
_tls_rawpk_version = b"3.6.6"
738
has_rawpk = bool(check_version(_tls_rawpk_version))
742
class pubkey_st(ctypes.Structure):
744
pubkey_t = ctypes.POINTER(pubkey_st)
746
x509_crt_fmt_t = ctypes.c_int
748
# All the function declarations below are from gnutls/abstract.h
749
pubkey_init = _library.gnutls_pubkey_init
750
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
751
pubkey_init.restype = _error_code
753
pubkey_import = _library.gnutls_pubkey_import
754
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
756
pubkey_import.restype = _error_code
758
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
759
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
760
ctypes.POINTER(ctypes.c_ubyte),
761
ctypes.POINTER(ctypes.c_size_t)]
762
pubkey_get_key_id.restype = _error_code
764
pubkey_deinit = _library.gnutls_pubkey_deinit
765
pubkey_deinit.argtypes = [pubkey_t]
766
pubkey_deinit.restype = None
768
# All the function declarations below are from gnutls/openpgp.h
770
openpgp_crt_init = _library.gnutls_openpgp_crt_init
771
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
772
openpgp_crt_init.restype = _error_code
774
openpgp_crt_import = _library.gnutls_openpgp_crt_import
775
openpgp_crt_import.argtypes = [openpgp_crt_t,
776
ctypes.POINTER(datum_t),
778
openpgp_crt_import.restype = _error_code
780
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
781
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
782
ctypes.POINTER(ctypes.c_uint)]
783
openpgp_crt_verify_self.restype = _error_code
785
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
786
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
787
openpgp_crt_deinit.restype = None
789
openpgp_crt_get_fingerprint = (
790
_library.gnutls_openpgp_crt_get_fingerprint)
791
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
795
openpgp_crt_get_fingerprint.restype = _error_code
797
if check_version("3.6.4"):
798
certificate_type_get2 = _library.gnutls_certificate_type_get2
799
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
800
certificate_type_get2.restype = _error_code
802
# Remove non-public functions
803
del _error_code, _retry_on_error
806
def call_pipe(connection, # : multiprocessing.Connection
807
func, *args, **kwargs):
808
"""This function is meant to be called by multiprocessing.Process
810
This function runs func(*args, **kwargs), and writes the resulting
811
return value on the provided multiprocessing.Connection.
813
connection.send(func(*args, **kwargs))
395
def timedelta_to_milliseconds(td):
396
"Convert a datetime.timedelta() to milliseconds"
397
return ((td.days * 24 * 60 * 60 * 1000)
398
+ (td.seconds * 1000)
399
+ (td.microseconds // 1000))
817
402
class Client(object):
818
403
"""A representation of a client host served by this server.
821
406
approved: bool(); 'None' if not yet approved/disapproved
822
407
approval_delay: datetime.timedelta(); Time to wait for approval
859
440
runtime_expansions: Allowed attributes for runtime expansion.
860
441
expires: datetime.datetime(); time (UTC) when a client will be
861
442
disabled, or None
862
server_settings: The server_settings dict from main()
865
445
runtime_expansions = ("approval_delay", "approval_duration",
866
"created", "enabled", "expires", "key_id",
446
"created", "enabled", "expires",
867
447
"fingerprint", "host", "interval",
868
448
"last_approval_request", "last_checked_ok",
869
449
"last_enabled", "name", "timeout")
872
"extended_timeout": "PT15M",
874
"checker": "fping -q -- %%(host)s",
876
"approval_delay": "PT0S",
877
"approval_duration": "PT1S",
878
"approved_by_default": "True",
450
client_defaults = { "timeout": "PT5M",
451
"extended_timeout": "PT15M",
453
"checker": "fping -q -- %%(host)s",
455
"approval_delay": "PT0S",
456
"approval_duration": "PT1S",
457
"approved_by_default": "True",
461
def timeout_milliseconds(self):
462
"Return the 'timeout' attribute in milliseconds"
463
return timedelta_to_milliseconds(self.timeout)
465
def extended_timeout_milliseconds(self):
466
"Return the 'extended_timeout' attribute in milliseconds"
467
return timedelta_to_milliseconds(self.extended_timeout)
469
def interval_milliseconds(self):
470
"Return the 'interval' attribute in milliseconds"
471
return timedelta_to_milliseconds(self.interval)
473
def approval_delay_milliseconds(self):
474
return timedelta_to_milliseconds(self.approval_delay)
883
477
def config_parser(config):
884
478
"""Construct a new dict of client settings of this form:
1002
591
logger.info("Disabling client %s", self.name)
1003
592
if getattr(self, "disable_initiator_tag", None) is not None:
1004
GLib.source_remove(self.disable_initiator_tag)
593
gobject.source_remove(self.disable_initiator_tag)
1005
594
self.disable_initiator_tag = None
1006
595
self.expires = None
1007
596
if getattr(self, "checker_initiator_tag", None) is not None:
1008
GLib.source_remove(self.checker_initiator_tag)
597
gobject.source_remove(self.checker_initiator_tag)
1009
598
self.checker_initiator_tag = None
1010
599
self.stop_checker()
1011
600
self.enabled = False
1013
602
self.send_changedstate()
1014
# Do not run this again if called by a GLib.timeout_add
603
# Do not run this again if called by a gobject.timeout_add
1017
606
def __del__(self):
1020
609
def init_checker(self):
1021
610
# Schedule a new checker to be started an 'interval' from now,
1022
611
# and every interval from then on.
1023
612
if self.checker_initiator_tag is not None:
1024
GLib.source_remove(self.checker_initiator_tag)
1025
self.checker_initiator_tag = GLib.timeout_add(
1026
int(self.interval.total_seconds() * 1000),
613
gobject.source_remove(self.checker_initiator_tag)
614
self.checker_initiator_tag = (gobject.timeout_add
615
(self.interval_milliseconds(),
1028
617
# Schedule a disable() when 'timeout' has passed
1029
618
if self.disable_initiator_tag is not None:
1030
GLib.source_remove(self.disable_initiator_tag)
1031
self.disable_initiator_tag = GLib.timeout_add(
1032
int(self.timeout.total_seconds() * 1000), self.disable)
619
gobject.source_remove(self.disable_initiator_tag)
620
self.disable_initiator_tag = (gobject.timeout_add
621
(self.timeout_milliseconds(),
1033
623
# Also start a new checker *right now*.
1034
624
self.start_checker()
1036
def checker_callback(self, source, condition, connection,
626
def checker_callback(self, pid, condition, command):
1038
627
"""The checker has completed, so take appropriate actions."""
1039
628
self.checker_callback_tag = None
1040
629
self.checker = None
1041
# Read return code from connection (see call_pipe)
1042
returncode = connection.recv()
1046
self.last_checker_status = returncode
1047
self.last_checker_signal = None
630
if os.WIFEXITED(condition):
631
self.last_checker_status = os.WEXITSTATUS(condition)
1048
632
if self.last_checker_status == 0:
1049
633
logger.info("Checker for %(name)s succeeded",
1051
635
self.checked_ok()
1053
logger.info("Checker for %(name)s failed", vars(self))
637
logger.info("Checker for %(name)s failed",
1055
640
self.last_checker_status = -1
1056
self.last_checker_signal = -returncode
1057
641
logger.warning("Checker for %(name)s crashed?",
1061
644
def checked_ok(self):
1062
645
"""Assert that the client has been seen, alive and well."""
1063
646
self.last_checked_ok = datetime.datetime.utcnow()
1064
647
self.last_checker_status = 0
1065
self.last_checker_signal = None
1066
648
self.bump_timeout()
1068
650
def bump_timeout(self, timeout=None):
1069
651
"""Bump up the timeout for this client."""
1070
652
if timeout is None:
1071
653
timeout = self.timeout
1072
654
if self.disable_initiator_tag is not None:
1073
GLib.source_remove(self.disable_initiator_tag)
655
gobject.source_remove(self.disable_initiator_tag)
1074
656
self.disable_initiator_tag = None
1075
657
if getattr(self, "enabled", False):
1076
self.disable_initiator_tag = GLib.timeout_add(
1077
int(timeout.total_seconds() * 1000), self.disable)
658
self.disable_initiator_tag = (gobject.timeout_add
659
(timedelta_to_milliseconds
660
(timeout), self.disable))
1078
661
self.expires = datetime.datetime.utcnow() + timeout
1080
663
def need_approval(self):
1081
664
self.last_approval_request = datetime.datetime.utcnow()
1083
666
def start_checker(self):
1084
667
"""Start a new checker subprocess if one is not running.
1086
669
If a checker already exists, leave it running and do
1088
671
# The reason for not killing a running checker is that if we
1093
676
# checkers alone, the checker would have to take more time
1094
677
# than 'timeout' for the client to be disabled, which is as it
1097
if self.checker is not None and not self.checker.is_alive():
1098
logger.warning("Checker was not alive; joining")
680
# If a checker exists, make sure it is not a zombie
682
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
683
except (AttributeError, OSError) as error:
684
if (isinstance(error, OSError)
685
and error.errno != errno.ECHILD):
689
logger.warning("Checker was a zombie")
690
gobject.source_remove(self.checker_callback_tag)
691
self.checker_callback(pid, status,
692
self.current_checker_command)
1101
693
# Start a new checker if needed
1102
694
if self.checker is None:
1103
695
# Escape attributes for the shell
1105
attr: re.escape(str(getattr(self, attr)))
1106
for attr in self.runtime_expansions}
696
escaped_attrs = dict(
697
(attr, re.escape(unicode(getattr(self, attr))))
699
self.runtime_expansions)
1108
701
command = self.checker_command % escaped_attrs
1109
702
except TypeError as error:
1110
703
logger.error('Could not format string "%s"',
1111
self.checker_command,
704
self.checker_command, exc_info=error)
705
return True # Try again later
706
self.current_checker_command = command
708
logger.info("Starting checker %r for %s",
710
# We don't need to redirect stdout and stderr, since
711
# in normal mode, that is already done by daemon(),
712
# and in debug mode we don't want to. (Stdin is
713
# always replaced by /dev/null.)
714
self.checker = subprocess.Popen(command,
717
except OSError as error:
718
logger.error("Failed to start subprocess",
1113
return True # Try again later
1114
self.current_checker_command = command
1115
logger.info("Starting checker %r for %s", command,
1117
# We don't need to redirect stdout and stderr, since
1118
# in normal mode, that is already done by daemon(),
1119
# and in debug mode we don't want to. (Stdin is
1120
# always replaced by /dev/null.)
1121
# The exception is when not debugging but nevertheless
1122
# running in the foreground; use the previously
1124
popen_args = {"close_fds": True,
1127
if (not self.server_settings["debug"]
1128
and self.server_settings["foreground"]):
1129
popen_args.update({"stdout": wnull,
1131
pipe = multiprocessing.Pipe(duplex=False)
1132
self.checker = multiprocessing.Process(
1134
args=(pipe[1], subprocess.call, command),
1136
self.checker.start()
1137
self.checker_callback_tag = GLib.io_add_watch(
1138
pipe[0].fileno(), GLib.IO_IN,
1139
self.checker_callback, pipe[0], command)
1140
# Re-run this periodically if run by GLib.timeout_add
721
self.checker_callback_tag = (gobject.child_watch_add
723
self.checker_callback,
725
# The checker may have completed before the gobject
726
# watch was added. Check for this.
728
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
729
except OSError as error:
730
if error.errno == errno.ECHILD:
731
# This should never happen
732
logger.error("Child process vanished",
737
gobject.source_remove(self.checker_callback_tag)
738
self.checker_callback(pid, status, command)
739
# Re-run this periodically if run by gobject.timeout_add
1143
742
def stop_checker(self):
1144
743
"""Force the checker process, if any, to stop."""
1145
744
if self.checker_callback_tag:
1146
GLib.source_remove(self.checker_callback_tag)
745
gobject.source_remove(self.checker_callback_tag)
1147
746
self.checker_callback_tag = None
1148
747
if getattr(self, "checker", None) is None:
1150
749
logger.debug("Stopping checker for %(name)s", vars(self))
1151
self.checker.terminate()
751
self.checker.terminate()
753
#if self.checker.poll() is None:
754
# self.checker.kill()
755
except OSError as error:
756
if error.errno != errno.ESRCH: # No such process
1152
758
self.checker = None
1155
def dbus_service_property(dbus_interface,
761
def dbus_service_property(dbus_interface, signature="v",
762
access="readwrite", byte_arrays=False):
1159
763
"""Decorators for marking methods of a DBusObjectWithProperties to
1160
764
become properties on the D-Bus.
1162
766
The decorated method will be called with no arguments by "Get"
1163
767
and with one argument by "Set".
1165
769
The parameters, where they are supported, are the same as
1166
770
dbus.service.method, except there is only "signature", since the
1167
771
type from Get() and the type sent to Set() is the same.
1250
class DBusObjectWithAnnotations(dbus.service.Object):
1251
"""A D-Bus object with annotations.
1253
Classes inheriting from this can use the dbus_annotations
1254
decorator to add annotations to methods or signals.
847
class DBusObjectWithProperties(dbus.service.Object):
848
"""A D-Bus object with properties.
850
Classes inheriting from this can use the dbus_service_property
851
decorator to expose methods as D-Bus properties. It exposes the
852
standard Get(), Set(), and GetAll() methods on the D-Bus.
1258
856
def _is_dbus_thing(thing):
1259
857
"""Returns a function testing if an attribute is a D-Bus thing
1261
859
If called like _is_dbus_thing("method") it returns a function
1262
860
suitable for use as predicate to inspect.getmembers().
1264
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
862
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
1267
865
def _get_all_dbus_things(self, thing):
1268
866
"""Returns a generator of (name, attribute) pairs
1270
return ((getattr(athing.__get__(self), "_dbus_name", name),
868
return ((getattr(athing.__get__(self), "_dbus_name",
1271
870
athing.__get__(self))
1272
871
for cls in self.__class__.__mro__
1273
872
for name, athing in
1274
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1276
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1278
path_keyword='object_path',
1279
connection_keyword='connection')
1280
def Introspect(self, object_path, connection):
1281
"""Overloading of standard D-Bus method.
1283
Inserts annotation tags on methods and signals.
1285
xmlstring = dbus.service.Object.Introspect(self, object_path,
1288
document = xml.dom.minidom.parseString(xmlstring)
1290
for if_tag in document.getElementsByTagName("interface"):
1291
# Add annotation tags
1292
for typ in ("method", "signal"):
1293
for tag in if_tag.getElementsByTagName(typ):
1295
for name, prop in (self.
1296
_get_all_dbus_things(typ)):
1297
if (name == tag.getAttribute("name")
1298
and prop._dbus_interface
1299
== if_tag.getAttribute("name")):
1300
annots.update(getattr(
1301
prop, "_dbus_annotations", {}))
1302
for name, value in annots.items():
1303
ann_tag = document.createElement(
1305
ann_tag.setAttribute("name", name)
1306
ann_tag.setAttribute("value", value)
1307
tag.appendChild(ann_tag)
1308
# Add interface annotation tags
1309
for annotation, value in dict(
1310
itertools.chain.from_iterable(
1311
annotations().items()
1312
for name, annotations
1313
in self._get_all_dbus_things("interface")
1314
if name == if_tag.getAttribute("name")
1316
ann_tag = document.createElement("annotation")
1317
ann_tag.setAttribute("name", annotation)
1318
ann_tag.setAttribute("value", value)
1319
if_tag.appendChild(ann_tag)
1320
# Fix argument name for the Introspect method itself
1321
if (if_tag.getAttribute("name")
1322
== dbus.INTROSPECTABLE_IFACE):
1323
for cn in if_tag.getElementsByTagName("method"):
1324
if cn.getAttribute("name") == "Introspect":
1325
for arg in cn.getElementsByTagName("arg"):
1326
if (arg.getAttribute("direction")
1328
arg.setAttribute("name",
1330
xmlstring = document.toxml("utf-8")
1332
except (AttributeError, xml.dom.DOMException,
1333
xml.parsers.expat.ExpatError) as error:
1334
logger.error("Failed to override Introspection method",
1339
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1340
"""A D-Bus object with properties.
1342
Classes inheriting from this can use the dbus_service_property
1343
decorator to expose methods as D-Bus properties. It exposes the
1344
standard Get(), Set(), and GetAll() methods on the D-Bus.
873
inspect.getmembers(cls,
874
self._is_dbus_thing(thing)))
1347
876
def _get_dbus_property(self, interface_name, property_name):
1348
877
"""Returns a bound method if one exists which is a D-Bus
1349
878
property with the specified name and interface.
1351
for cls in self.__class__.__mro__:
1352
for name, value in inspect.getmembers(
1353
cls, self._is_dbus_thing("property")):
880
for cls in self.__class__.__mro__:
881
for name, value in (inspect.getmembers
883
self._is_dbus_thing("property"))):
1354
884
if (value._dbus_name == property_name
1355
885
and value._dbus_interface == interface_name):
1356
886
return value.__get__(self)
1358
888
# No such property
1359
raise DBusPropertyNotFound("{}:{}.{}".format(
1360
self.dbus_object_path, interface_name, property_name))
1363
def _get_all_interface_names(cls):
1364
"""Get a sequence of all interfaces supported by an object"""
1365
return (name for name in set(getattr(getattr(x, attr),
1366
"_dbus_interface", None)
1367
for x in (inspect.getmro(cls))
1369
if name is not None)
1371
@dbus.service.method(dbus.PROPERTIES_IFACE,
889
raise DBusPropertyNotFound(self.dbus_object_path + ":"
890
+ interface_name + "."
893
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1373
894
out_signature="v")
1374
895
def Get(self, interface_name, property_name):
1375
896
"""Standard D-Bus property Get() method, see D-Bus standard.
1504
1026
return xmlstring
1508
dbus.OBJECT_MANAGER_IFACE
1509
except AttributeError:
1510
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1513
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1514
"""A D-Bus object with an ObjectManager.
1516
Classes inheriting from this exposes the standard
1517
GetManagedObjects call and the InterfacesAdded and
1518
InterfacesRemoved signals on the standard
1519
"org.freedesktop.DBus.ObjectManager" interface.
1521
Note: No signals are sent automatically; they must be sent
1524
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1525
out_signature="a{oa{sa{sv}}}")
1526
def GetManagedObjects(self):
1527
"""This function must be overridden"""
1528
raise NotImplementedError()
1530
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1531
signature="oa{sa{sv}}")
1532
def InterfacesAdded(self, object_path, interfaces_and_properties):
1535
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1536
def InterfacesRemoved(self, object_path, interfaces):
1539
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1541
path_keyword='object_path',
1542
connection_keyword='connection')
1543
def Introspect(self, object_path, connection):
1544
"""Overloading of standard D-Bus method.
1546
Override return argument name of GetManagedObjects to be
1547
"objpath_interfaces_and_properties"
1549
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1553
document = xml.dom.minidom.parseString(xmlstring)
1555
for if_tag in document.getElementsByTagName("interface"):
1556
# Fix argument name for the GetManagedObjects method
1557
if (if_tag.getAttribute("name")
1558
== dbus.OBJECT_MANAGER_IFACE):
1559
for cn in if_tag.getElementsByTagName("method"):
1560
if (cn.getAttribute("name")
1561
== "GetManagedObjects"):
1562
for arg in cn.getElementsByTagName("arg"):
1563
if (arg.getAttribute("direction")
1567
"objpath_interfaces"
1569
xmlstring = document.toxml("utf-8")
1571
except (AttributeError, xml.dom.DOMException,
1572
xml.parsers.expat.ExpatError) as error:
1573
logger.error("Failed to override Introspection method",
1578
1029
def datetime_to_dbus(dt, variant_level=0):
1579
1030
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1581
return dbus.String("", variant_level=variant_level)
1582
return dbus.String(dt.isoformat(), variant_level=variant_level)
1032
return dbus.String("", variant_level = variant_level)
1033
return dbus.String(dt.isoformat(),
1034
variant_level=variant_level)
1585
1037
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1616
1067
# Ignore non-D-Bus attributes, and D-Bus attributes
1617
1068
# with the wrong interface name
1618
1069
if (not hasattr(attribute, "_dbus_interface")
1619
or not attribute._dbus_interface.startswith(
1620
orig_interface_name)):
1070
or not attribute._dbus_interface
1071
.startswith(orig_interface_name)):
1622
1073
# Create an alternate D-Bus interface name based on
1623
1074
# the current name
1624
alt_interface = attribute._dbus_interface.replace(
1625
orig_interface_name, alt_interface_name)
1075
alt_interface = (attribute._dbus_interface
1076
.replace(orig_interface_name,
1077
alt_interface_name))
1626
1078
interface_names.add(alt_interface)
1627
1079
# Is this a D-Bus signal?
1628
1080
if getattr(attribute, "_dbus_is_signal", False):
1629
# Extract the original non-method undecorated
1630
# function by black magic
1631
if sys.version_info.major == 2:
1632
nonmethod_func = (dict(
1081
# Extract the original non-method function by
1083
nonmethod_func = (dict(
1633
1084
zip(attribute.func_code.co_freevars,
1634
attribute.__closure__))
1635
["func"].cell_contents)
1637
nonmethod_func = (dict(
1638
zip(attribute.__code__.co_freevars,
1639
attribute.__closure__))
1640
["func"].cell_contents)
1085
attribute.__closure__))["func"]
1641
1087
# Create a new, but exactly alike, function
1642
1088
# object, and decorate it to be a new D-Bus signal
1643
1089
# with the alternate D-Bus interface name
1644
new_function = copy_function(nonmethod_func)
1645
new_function = (dbus.service.signal(
1647
attribute._dbus_signature)(new_function))
1090
new_function = (dbus.service.signal
1092
attribute._dbus_signature)
1093
(types.FunctionType(
1094
nonmethod_func.func_code,
1095
nonmethod_func.func_globals,
1096
nonmethod_func.func_name,
1097
nonmethod_func.func_defaults,
1098
nonmethod_func.func_closure)))
1648
1099
# Copy annotations, if any
1650
new_function._dbus_annotations = dict(
1651
attribute._dbus_annotations)
1101
new_function._dbus_annotations = (
1102
dict(attribute._dbus_annotations))
1652
1103
except AttributeError:
1655
1105
# Define a creator of a function to call both the
1656
1106
# original and alternate functions, so both the
1657
1107
# original and alternate signals gets sent when
1946
1390
server to mandos-client
1950
1394
# Rejected - signal
1951
1395
@dbus.service.signal(_interface, signature="s")
1952
1396
def Rejected(self, reason):
1956
1400
# NeedApproval - signal
1957
1401
@dbus.service.signal(_interface, signature="tb")
1958
1402
def NeedApproval(self, timeout, default):
1960
1404
return self.need_approval()
1964
1408
# Approve - method
1965
1409
@dbus.service.method(_interface, in_signature="b")
1966
1410
def Approve(self, value):
1967
1411
self.approve(value)
1969
1413
# CheckedOK - method
1970
1414
@dbus.service.method(_interface)
1971
1415
def CheckedOK(self):
1972
1416
self.checked_ok()
1974
1418
# Enable - method
1975
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1976
1419
@dbus.service.method(_interface)
1977
1420
def Enable(self):
1981
1424
# StartChecker - method
1982
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1983
1425
@dbus.service.method(_interface)
1984
1426
def StartChecker(self):
1986
1428
self.start_checker()
1988
1430
# Disable - method
1989
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1990
1431
@dbus.service.method(_interface)
1991
1432
def Disable(self):
1995
1436
# StopChecker - method
1996
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1997
1437
@dbus.service.method(_interface)
1998
1438
def StopChecker(self):
1999
1439
self.stop_checker()
2003
1443
# ApprovalPending - property
2004
1444
@dbus_service_property(_interface, signature="b", access="read")
2005
1445
def ApprovalPending_dbus_property(self):
2006
1446
return dbus.Boolean(bool(self.approvals_pending))
2008
1448
# ApprovedByDefault - property
2009
@dbus_service_property(_interface,
1449
@dbus_service_property(_interface, signature="b",
2011
1450
access="readwrite")
2012
1451
def ApprovedByDefault_dbus_property(self, value=None):
2013
1452
if value is None: # get
2014
1453
return dbus.Boolean(self.approved_by_default)
2015
1454
self.approved_by_default = bool(value)
2017
1456
# ApprovalDelay - property
2018
@dbus_service_property(_interface,
1457
@dbus_service_property(_interface, signature="t",
2020
1458
access="readwrite")
2021
1459
def ApprovalDelay_dbus_property(self, value=None):
2022
1460
if value is None: # get
2023
return dbus.UInt64(self.approval_delay.total_seconds()
1461
return dbus.UInt64(self.approval_delay_milliseconds())
2025
1462
self.approval_delay = datetime.timedelta(0, 0, 0, value)
2027
1464
# ApprovalDuration - property
2028
@dbus_service_property(_interface,
1465
@dbus_service_property(_interface, signature="t",
2030
1466
access="readwrite")
2031
1467
def ApprovalDuration_dbus_property(self, value=None):
2032
1468
if value is None: # get
2033
return dbus.UInt64(self.approval_duration.total_seconds()
1469
return dbus.UInt64(timedelta_to_milliseconds(
1470
self.approval_duration))
2035
1471
self.approval_duration = datetime.timedelta(0, 0, 0, value)
2037
1473
# Name - property
2039
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2040
1474
@dbus_service_property(_interface, signature="s", access="read")
2041
1475
def Name_dbus_property(self):
2042
1476
return dbus.String(self.name)
2046
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2047
@dbus_service_property(_interface, signature="s", access="read")
2048
def KeyID_dbus_property(self):
2049
return dbus.String(self.key_id)
2051
1478
# Fingerprint - property
2053
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2054
1479
@dbus_service_property(_interface, signature="s", access="read")
2055
1480
def Fingerprint_dbus_property(self):
2056
1481
return dbus.String(self.fingerprint)
2058
1483
# Host - property
2059
@dbus_service_property(_interface,
1484
@dbus_service_property(_interface, signature="s",
2061
1485
access="readwrite")
2062
1486
def Host_dbus_property(self, value=None):
2063
1487
if value is None: # get
2064
1488
return dbus.String(self.host)
2065
self.host = str(value)
1489
self.host = unicode(value)
2067
1491
# Created - property
2069
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2070
1492
@dbus_service_property(_interface, signature="s", access="read")
2071
1493
def Created_dbus_property(self):
2072
1494
return datetime_to_dbus(self.created)
2074
1496
# LastEnabled - property
2075
1497
@dbus_service_property(_interface, signature="s", access="read")
2076
1498
def LastEnabled_dbus_property(self):
2077
1499
return datetime_to_dbus(self.last_enabled)
2079
1501
# Enabled - property
2080
@dbus_service_property(_interface,
1502
@dbus_service_property(_interface, signature="b",
2082
1503
access="readwrite")
2083
1504
def Enabled_dbus_property(self, value=None):
2084
1505
if value is None: # get
2133
1553
if (getattr(self, "disable_initiator_tag", None)
2136
GLib.source_remove(self.disable_initiator_tag)
2137
self.disable_initiator_tag = GLib.timeout_add(
2138
int((self.expires - now).total_seconds() * 1000),
1556
gobject.source_remove(self.disable_initiator_tag)
1557
self.disable_initiator_tag = (
1558
gobject.timeout_add(
1559
timedelta_to_milliseconds(self.expires - now),
2141
1562
# ExtendedTimeout - property
2142
@dbus_service_property(_interface,
1563
@dbus_service_property(_interface, signature="t",
2144
1564
access="readwrite")
2145
1565
def ExtendedTimeout_dbus_property(self, value=None):
2146
1566
if value is None: # get
2147
return dbus.UInt64(self.extended_timeout.total_seconds()
1567
return dbus.UInt64(self.extended_timeout_milliseconds())
2149
1568
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2151
1570
# Interval - property
2152
@dbus_service_property(_interface,
1571
@dbus_service_property(_interface, signature="t",
2154
1572
access="readwrite")
2155
1573
def Interval_dbus_property(self, value=None):
2156
1574
if value is None: # get
2157
return dbus.UInt64(self.interval.total_seconds() * 1000)
1575
return dbus.UInt64(self.interval_milliseconds())
2158
1576
self.interval = datetime.timedelta(0, 0, 0, value)
2159
1577
if getattr(self, "checker_initiator_tag", None) is None:
2161
1579
if self.enabled:
2162
1580
# Reschedule checker run
2163
GLib.source_remove(self.checker_initiator_tag)
2164
self.checker_initiator_tag = GLib.timeout_add(
2165
value, self.start_checker)
2166
self.start_checker() # Start one now, too
1581
gobject.source_remove(self.checker_initiator_tag)
1582
self.checker_initiator_tag = (gobject.timeout_add
1583
(value, self.start_checker))
1584
self.start_checker() # Start one now, too
2168
1586
# Checker - property
2169
@dbus_service_property(_interface,
1587
@dbus_service_property(_interface, signature="s",
2171
1588
access="readwrite")
2172
1589
def Checker_dbus_property(self, value=None):
2173
1590
if value is None: # get
2174
1591
return dbus.String(self.checker_command)
2175
self.checker_command = str(value)
1592
self.checker_command = unicode(value)
2177
1594
# CheckerRunning - property
2178
@dbus_service_property(_interface,
1595
@dbus_service_property(_interface, signature="b",
2180
1596
access="readwrite")
2181
1597
def CheckerRunning_dbus_property(self, value=None):
2182
1598
if value is None: # get
2239
1645
class ClientHandler(socketserver.BaseRequestHandler, object):
2240
1646
"""A class to handle client connections.
2242
1648
Instantiated once for each connection to handle it.
2243
1649
Note: This will run in its own forked process."""
2245
1651
def handle(self):
2246
1652
with contextlib.closing(self.server.child_pipe) as child_pipe:
2247
1653
logger.info("TCP connection from: %s",
2248
str(self.client_address))
1654
unicode(self.client_address))
2249
1655
logger.debug("Pipe FD: %d",
2250
1656
self.server.child_pipe.fileno())
2252
session = gnutls.ClientSession(self.request)
2254
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2255
# "+AES-256-CBC", "+SHA1",
2256
# "+COMP-NULL", "+CTYPE-OPENPGP",
1658
session = (gnutls.connection
1659
.ClientSession(self.request,
1661
.X509Credentials()))
1663
# Note: gnutls.connection.X509Credentials is really a
1664
# generic GnuTLS certificate credentials object so long as
1665
# no X.509 keys are added to it. Therefore, we can use it
1666
# here despite using OpenPGP certificates.
1668
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1669
# "+AES-256-CBC", "+SHA1",
1670
# "+COMP-NULL", "+CTYPE-OPENPGP",
2258
1672
# Use a fallback default, since this MUST be set.
2259
1673
priority = self.server.gnutls_priority
2260
1674
if priority is None:
2261
1675
priority = "NORMAL"
2262
gnutls.priority_set_direct(session._c_object,
2263
priority.encode("utf-8"),
1676
(gnutls.library.functions
1677
.gnutls_priority_set_direct(session._c_object,
2266
1680
# Start communication using the Mandos protocol
2267
1681
# Get protocol number
2268
1682
line = self.request.makefile().readline()
2269
1683
logger.debug("Protocol version: %r", line)
2271
1685
if int(line.strip().split()[0]) > 1:
2272
raise RuntimeError(line)
2273
1687
except (ValueError, IndexError, RuntimeError) as error:
2274
1688
logger.error("Unknown protocol version: %s", error)
2277
1691
# Start GnuTLS connection
2279
1693
session.handshake()
2280
except gnutls.Error as error:
1694
except gnutls.errors.GNUTLSError as error:
2281
1695
logger.warning("Handshake failed: %s", error)
2282
1696
# Do not run session.bye() here: the session is not
2283
1697
# established. Just abandon the request.
2285
1699
logger.debug("Handshake succeeded")
2287
1701
approval_required = False
2289
if gnutls.has_rawpk:
2292
key_id = self.key_id(
2293
self.peer_certificate(session))
2294
except (TypeError, gnutls.Error) as error:
2295
logger.warning("Bad certificate: %s", error)
2297
logger.debug("Key ID: %s", key_id)
2302
fpr = self.fingerprint(
2303
self.peer_certificate(session))
2304
except (TypeError, gnutls.Error) as error:
2305
logger.warning("Bad certificate: %s", error)
2307
logger.debug("Fingerprint: %s", fpr)
2310
client = ProxyClient(child_pipe, key_id, fpr,
1704
fpr = self.fingerprint(self.peer_certificate
1707
gnutls.errors.GNUTLSError) as error:
1708
logger.warning("Bad certificate: %s", error)
1710
logger.debug("Fingerprint: %s", fpr)
1713
client = ProxyClient(child_pipe, fpr,
2311
1714
self.client_address)
2312
1715
except KeyError:
2315
1718
if client.approval_delay:
2316
1719
delay = client.approval_delay
2317
1720
client.approvals_pending += 1
2318
1721
approval_required = True
2321
1724
if not client.enabled:
2322
1725
logger.info("Client %s is disabled",
2324
1727
if self.server.use_dbus:
2325
1728
# Emit D-Bus signal
2326
1729
client.Rejected("Disabled")
2329
1732
if client.approved or not client.approval_delay:
2330
# We are approved or approval is disabled
1733
#We are approved or approval is disabled
2332
1735
elif client.approved is None:
2333
1736
logger.info("Client %s needs approval",
2366
1771
delay -= time2 - time
2369
session.send(client.secret)
2370
except gnutls.Error as error:
2371
logger.warning("gnutls send failed",
1774
while sent_size < len(client.secret):
1776
sent = session.send(client.secret[sent_size:])
1777
except gnutls.errors.GNUTLSError as error:
1778
logger.warning("gnutls send failed",
1781
logger.debug("Sent: %d, remaining: %d",
1782
sent, len(client.secret)
1783
- (sent_size + sent))
2375
1786
logger.info("Sending secret to %s", client.name)
2376
1787
# bump the timeout using extended_timeout
2377
1788
client.bump_timeout(client.extended_timeout)
2378
1789
if self.server.use_dbus:
2379
1790
# Emit D-Bus signal
2380
1791
client.GotSecret()
2383
1794
if approval_required:
2384
1795
client.approvals_pending -= 1
2387
except gnutls.Error as error:
1798
except gnutls.errors.GNUTLSError as error:
2388
1799
logger.warning("GnuTLS bye failed",
2389
1800
exc_info=error)
2392
1803
def peer_certificate(session):
2393
"Return the peer's certificate as a bytestring"
2395
cert_type = gnutls.certificate_type_get2(session._c_object,
2397
except AttributeError:
2398
cert_type = gnutls.certificate_type_get(session._c_object)
2399
if gnutls.has_rawpk:
2400
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2402
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2403
# If not a valid certificate type...
2404
if cert_type not in valid_cert_types:
2405
logger.info("Cert type %r not in %r", cert_type,
2407
# ...return invalid data
1804
"Return the peer's OpenPGP certificate as a bytestring"
1805
# If not an OpenPGP certificate...
1806
if (gnutls.library.functions
1807
.gnutls_certificate_type_get(session._c_object)
1808
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1809
# ...do the normal thing
1810
return session.peer_certificate
2409
1811
list_size = ctypes.c_uint(1)
2410
cert_list = (gnutls.certificate_get_peers
1812
cert_list = (gnutls.library.functions
1813
.gnutls_certificate_get_peers
2411
1814
(session._c_object, ctypes.byref(list_size)))
2412
1815
if not bool(cert_list) and list_size.value != 0:
2413
raise gnutls.Error("error getting peer certificate")
1816
raise gnutls.errors.GNUTLSError("error getting peer"
2414
1818
if list_size.value == 0:
2416
1820
cert = cert_list[0]
2417
1821
return ctypes.string_at(cert.data, cert.size)
2420
def key_id(certificate):
2421
"Convert a certificate bytestring to a hexdigit key ID"
2422
# New GnuTLS "datum" with the public key
2423
datum = gnutls.datum_t(
2424
ctypes.cast(ctypes.c_char_p(certificate),
2425
ctypes.POINTER(ctypes.c_ubyte)),
2426
ctypes.c_uint(len(certificate)))
2427
# XXX all these need to be created in the gnutls "module"
2428
# New empty GnuTLS certificate
2429
pubkey = gnutls.pubkey_t()
2430
gnutls.pubkey_init(ctypes.byref(pubkey))
2431
# Import the raw public key into the certificate
2432
gnutls.pubkey_import(pubkey,
2433
ctypes.byref(datum),
2434
gnutls.X509_FMT_DER)
2435
# New buffer for the key ID
2436
buf = ctypes.create_string_buffer(32)
2437
buf_len = ctypes.c_size_t(len(buf))
2438
# Get the key ID from the raw public key into the buffer
2439
gnutls.pubkey_get_key_id(pubkey,
2440
gnutls.KEYID_USE_SHA256,
2441
ctypes.cast(ctypes.byref(buf),
2442
ctypes.POINTER(ctypes.c_ubyte)),
2443
ctypes.byref(buf_len))
2444
# Deinit the certificate
2445
gnutls.pubkey_deinit(pubkey)
2447
# Convert the buffer to a Python bytestring
2448
key_id = ctypes.string_at(buf, buf_len.value)
2449
# Convert the bytestring to hexadecimal notation
2450
hex_key_id = binascii.hexlify(key_id).upper()
2454
1824
def fingerprint(openpgp):
2455
1825
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2456
1826
# New GnuTLS "datum" with the OpenPGP public key
2457
datum = gnutls.datum_t(
2458
ctypes.cast(ctypes.c_char_p(openpgp),
2459
ctypes.POINTER(ctypes.c_ubyte)),
2460
ctypes.c_uint(len(openpgp)))
1827
datum = (gnutls.library.types
1828
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1831
ctypes.c_uint(len(openpgp))))
2461
1832
# New empty GnuTLS certificate
2462
crt = gnutls.openpgp_crt_t()
2463
gnutls.openpgp_crt_init(ctypes.byref(crt))
1833
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1834
(gnutls.library.functions
1835
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2464
1836
# Import the OpenPGP public key into the certificate
2465
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2466
gnutls.OPENPGP_FMT_RAW)
1837
(gnutls.library.functions
1838
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1839
gnutls.library.constants
1840
.GNUTLS_OPENPGP_FMT_RAW))
2467
1841
# Verify the self signature in the key
2468
1842
crtverify = ctypes.c_uint()
2469
gnutls.openpgp_crt_verify_self(crt, 0,
2470
ctypes.byref(crtverify))
1843
(gnutls.library.functions
1844
.gnutls_openpgp_crt_verify_self(crt, 0,
1845
ctypes.byref(crtverify)))
2471
1846
if crtverify.value != 0:
2472
gnutls.openpgp_crt_deinit(crt)
2473
raise gnutls.CertificateSecurityError(code
1847
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1848
raise (gnutls.errors.CertificateSecurityError
2475
1850
# New buffer for the fingerprint
2476
1851
buf = ctypes.create_string_buffer(20)
2477
1852
buf_len = ctypes.c_size_t()
2478
1853
# Get the fingerprint from the certificate into the buffer
2479
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2480
ctypes.byref(buf_len))
1854
(gnutls.library.functions
1855
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1856
ctypes.byref(buf_len)))
2481
1857
# Deinit the certificate
2482
gnutls.openpgp_crt_deinit(crt)
1858
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2483
1859
# Convert the buffer to a Python bytestring
2484
1860
fpr = ctypes.string_at(buf, buf_len.value)
2485
1861
# Convert the bytestring to hexadecimal notation
2490
1866
class MultiprocessingMixIn(object):
2491
1867
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2493
1868
def sub_process_main(self, request, address):
2495
1870
self.finish_request(request, address)
2496
1871
except Exception:
2497
1872
self.handle_error(request, address)
2498
1873
self.close_request(request)
2500
1875
def process_request(self, request, address):
2501
1876
"""Start a new process to process the request."""
2502
proc = multiprocessing.Process(target=self.sub_process_main,
2503
args=(request, address))
1877
proc = multiprocessing.Process(target = self.sub_process_main,
1878
args = (request, address))
2508
1883
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2509
1884
""" adds a pipe to the MixIn """
2511
1885
def process_request(self, request, client_address):
2512
1886
"""Overrides and wraps the original process_request().
2514
1888
This function creates a new pipe in self.pipe
2516
1890
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2518
1892
proc = MultiprocessingMixIn.process_request(self, request,
2519
1893
client_address)
2520
1894
self.child_pipe.close()
2521
1895
self.add_pipe(parent_pipe, proc)
2523
1897
def add_pipe(self, parent_pipe, proc):
2524
1898
"""Dummy function; override as necessary"""
2525
raise NotImplementedError()
1899
raise NotImplementedError
2528
1902
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2529
1903
socketserver.TCPServer, object):
2530
1904
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2533
1907
enabled: Boolean; whether this server is activated yet
2534
1908
interface: None or a network interface name (string)
2535
1909
use_ipv6: Boolean; to use IPv6 or not
2538
1911
def __init__(self, server_address, RequestHandlerClass,
1912
interface=None, use_ipv6=True, socketfd=None):
2542
1913
"""If socketfd is set, use that file descriptor instead of
2543
1914
creating a new one with socket.socket().
2574
1944
# socket_wrapper(), if socketfd was set.
2575
1945
socketserver.TCPServer.__init__(self, server_address,
2576
1946
RequestHandlerClass)
2578
1948
def server_bind(self):
2579
1949
"""This overrides the normal server_bind() function
2580
1950
to bind to an interface if one was specified, and also NOT to
2581
1951
bind to an address or port if they were not specified."""
2582
global SO_BINDTODEVICE
2583
1952
if self.interface is not None:
2584
1953
if SO_BINDTODEVICE is None:
2585
# Fall back to a hard-coded value which seems to be
2587
logger.warning("SO_BINDTODEVICE not found, trying 25")
2588
SO_BINDTODEVICE = 25
2590
self.socket.setsockopt(
2591
socket.SOL_SOCKET, SO_BINDTODEVICE,
2592
(self.interface + "\0").encode("utf-8"))
2593
except socket.error as error:
2594
if error.errno == errno.EPERM:
2595
logger.error("No permission to bind to"
2596
" interface %s", self.interface)
2597
elif error.errno == errno.ENOPROTOOPT:
2598
logger.error("SO_BINDTODEVICE not available;"
2599
" cannot bind to interface %s",
2601
elif error.errno == errno.ENODEV:
2602
logger.error("Interface %s does not exist,"
2603
" cannot bind", self.interface)
1954
logger.error("SO_BINDTODEVICE does not exist;"
1955
" cannot bind to interface %s",
1959
self.socket.setsockopt(socket.SOL_SOCKET,
1961
str(self.interface + '\0'))
1962
except socket.error as error:
1963
if error.errno == errno.EPERM:
1964
logger.error("No permission to bind to"
1965
" interface %s", self.interface)
1966
elif error.errno == errno.ENOPROTOOPT:
1967
logger.error("SO_BINDTODEVICE not available;"
1968
" cannot bind to interface %s",
1970
elif error.errno == errno.ENODEV:
1971
logger.error("Interface %s does not exist,"
1972
" cannot bind", self.interface)
2606
1975
# Only bind(2) the socket if we really need to.
2607
1976
if self.server_address[0] or self.server_address[1]:
2608
1977
if not self.server_address[0]:
2609
1978
if self.address_family == socket.AF_INET6:
2610
any_address = "::" # in6addr_any
1979
any_address = "::" # in6addr_any
2612
any_address = "0.0.0.0" # INADDR_ANY
1981
any_address = socket.INADDR_ANY
2613
1982
self.server_address = (any_address,
2614
1983
self.server_address[1])
2615
1984
elif not self.server_address[1]:
2616
self.server_address = (self.server_address[0], 0)
1985
self.server_address = (self.server_address[0],
2617
1987
# if self.interface:
2618
1988
# self.server_address = (self.server_address[0],
2649
2014
self.gnutls_priority = gnutls_priority
2650
2015
IPv6_TCPServer.__init__(self, server_address,
2651
2016
RequestHandlerClass,
2652
interface=interface,
2017
interface = interface,
2018
use_ipv6 = use_ipv6,
2019
socketfd = socketfd)
2656
2020
def server_activate(self):
2657
2021
if self.enabled:
2658
2022
return socketserver.TCPServer.server_activate(self)
2660
2024
def enable(self):
2661
2025
self.enabled = True
2663
2027
def add_pipe(self, parent_pipe, proc):
2664
2028
# Call "handle_ipc" for both data and EOF events
2666
parent_pipe.fileno(),
2667
GLib.IO_IN | GLib.IO_HUP,
2668
functools.partial(self.handle_ipc,
2669
parent_pipe=parent_pipe,
2672
def handle_ipc(self, source, condition,
2675
client_object=None):
2029
gobject.io_add_watch(parent_pipe.fileno(),
2030
gobject.IO_IN | gobject.IO_HUP,
2031
functools.partial(self.handle_ipc,
2036
def handle_ipc(self, source, condition, parent_pipe=None,
2037
proc = None, client_object=None):
2676
2038
# error, or the other end of multiprocessing.Pipe has closed
2677
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2039
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2678
2040
# Wait for other process to exit
2682
2044
# Read a request from the child
2683
2045
request = parent_pipe.recv()
2684
2046
command = request[0]
2686
2048
if command == 'init':
2687
key_id = request[1].decode("ascii")
2688
fpr = request[2].decode("ascii")
2689
address = request[3]
2691
for c in self.clients.values():
2692
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2694
if key_id and c.key_id == key_id:
2697
if fpr and c.fingerprint == fpr:
2050
address = request[2]
2052
for c in self.clients.itervalues():
2053
if c.fingerprint == fpr:
2701
logger.info("Client not found for key ID: %s, address"
2702
": %s", key_id or fpr, address)
2057
logger.info("Client not found for fingerprint: %s, ad"
2058
"dress: %s", fpr, address)
2703
2059
if self.use_dbus:
2704
2060
# Emit D-Bus signal
2705
mandos_dbus_service.ClientNotFound(key_id or fpr,
2061
mandos_dbus_service.ClientNotFound(fpr,
2707
2063
parent_pipe.send(False)
2711
parent_pipe.fileno(),
2712
GLib.IO_IN | GLib.IO_HUP,
2713
functools.partial(self.handle_ipc,
2714
parent_pipe=parent_pipe,
2716
client_object=client))
2066
gobject.io_add_watch(parent_pipe.fileno(),
2067
gobject.IO_IN | gobject.IO_HUP,
2068
functools.partial(self.handle_ipc,
2717
2074
parent_pipe.send(True)
2718
2075
# remove the old hook in favor of the new above hook on
2946
2303
parser.add_argument("--no-dbus", action="store_false",
2947
2304
dest="use_dbus", help="Do not provide D-Bus"
2948
" system bus interface", default=None)
2305
" system bus interface")
2949
2306
parser.add_argument("--no-ipv6", action="store_false",
2950
dest="use_ipv6", help="Do not use IPv6",
2307
dest="use_ipv6", help="Do not use IPv6")
2952
2308
parser.add_argument("--no-restore", action="store_false",
2953
2309
dest="restore", help="Do not restore stored"
2954
" state", default=None)
2955
2311
parser.add_argument("--socket", type=int,
2956
2312
help="Specify a file descriptor to a network"
2957
2313
" socket to use instead of creating one")
2958
2314
parser.add_argument("--statedir", metavar="DIR",
2959
2315
help="Directory to save/restore state in")
2960
2316
parser.add_argument("--foreground", action="store_true",
2961
help="Run in foreground", default=None)
2962
parser.add_argument("--no-zeroconf", action="store_false",
2963
dest="zeroconf", help="Do not use Zeroconf",
2317
help="Run in foreground")
2966
2319
options = parser.parse_args()
2968
2321
if options.check:
2970
fail_count, test_count = doctest.testmod()
2971
sys.exit(os.EX_OK if fail_count == 0 else 1)
2973
2326
# Default values for config file for server-global settings
2974
if gnutls.has_rawpk:
2975
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2976
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2978
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2979
":+SIGN-DSA-SHA256")
2980
server_defaults = {"interface": "",
2984
"priority": priority,
2985
"servicename": "Mandos",
2991
"statedir": "/var/lib/mandos",
2992
"foreground": "False",
2327
server_defaults = { "interface": "",
2332
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2333
"servicename": "Mandos",
2339
"statedir": "/var/lib/mandos",
2340
"foreground": "False",
2997
2343
# Parse config file for server-global settings
2998
2344
server_config = configparser.SafeConfigParser(server_defaults)
2999
2345
del server_defaults
3000
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2346
server_config.read(os.path.join(options.configdir,
3001
2348
# Convert the SafeConfigParser object to a dict
3002
2349
server_settings = server_config.defaults()
3003
2350
# Use the appropriate methods on the non-string config options
3004
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3005
"foreground", "zeroconf"):
2351
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
3006
2352
server_settings[option] = server_config.getboolean("DEFAULT",
3008
2354
if server_settings["port"]:
3018
2364
server_settings["socket"] = os.dup(server_settings
3020
2366
del server_config
3022
2368
# Override the settings from the config file with command line
3023
2369
# options, if set.
3024
2370
for option in ("interface", "address", "port", "debug",
3025
"priority", "servicename", "configdir", "use_dbus",
3026
"use_ipv6", "debuglevel", "restore", "statedir",
3027
"socket", "foreground", "zeroconf"):
2371
"priority", "servicename", "configdir",
2372
"use_dbus", "use_ipv6", "debuglevel", "restore",
2373
"statedir", "socket", "foreground"):
3028
2374
value = getattr(options, option)
3029
2375
if value is not None:
3030
2376
server_settings[option] = value
3032
2378
# Force all strings to be unicode
3033
2379
for option in server_settings.keys():
3034
if isinstance(server_settings[option], bytes):
3035
server_settings[option] = (server_settings[option]
3037
# Force all boolean options to be boolean
3038
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3039
"foreground", "zeroconf"):
3040
server_settings[option] = bool(server_settings[option])
2380
if type(server_settings[option]) is str:
2381
server_settings[option] = unicode(server_settings[option])
3041
2382
# Debug implies foreground
3042
2383
if server_settings["debug"]:
3043
2384
server_settings["foreground"] = True
3044
2385
# Now we have our good server settings in "server_settings"
3046
2387
##################################################################
3048
if (not server_settings["zeroconf"]
3049
and not (server_settings["port"]
3050
or server_settings["socket"] != "")):
3051
parser.error("Needs port or socket to work without Zeroconf")
3053
2389
# For convenience
3054
2390
debug = server_settings["debug"]
3055
2391
debuglevel = server_settings["debuglevel"]
3069
2404
level = getattr(logging, debuglevel.upper())
3070
2405
initlogger(debug, level)
3072
2407
if server_settings["servicename"] != "Mandos":
3073
syslogger.setFormatter(
3074
logging.Formatter('Mandos ({}) [%(process)d]:'
3075
' %(levelname)s: %(message)s'.format(
3076
server_settings["servicename"])))
2408
syslogger.setFormatter(logging.Formatter
2409
('Mandos ({0}) [%(process)d]:'
2410
' %(levelname)s: %(message)s'
2411
.format(server_settings
3078
2414
# Parse config file with clients
3079
2415
client_config = configparser.SafeConfigParser(Client
3080
2416
.client_defaults)
3081
2417
client_config.read(os.path.join(server_settings["configdir"],
3082
2418
"clients.conf"))
3084
2420
global mandos_dbus_service
3085
2421
mandos_dbus_service = None
3088
if server_settings["socket"] != "":
3089
socketfd = server_settings["socket"]
3090
tcp_server = MandosServer(
3091
(server_settings["address"], server_settings["port"]),
3093
interface=(server_settings["interface"] or None),
3095
gnutls_priority=server_settings["priority"],
2423
tcp_server = MandosServer((server_settings["address"],
2424
server_settings["port"]),
2426
interface=(server_settings["interface"]
2430
server_settings["priority"],
2432
socketfd=(server_settings["socket"]
3098
2434
if not foreground:
3099
pidfilename = "/run/mandos.pid"
3100
if not os.path.isdir("/run/."):
3101
pidfilename = "/var/run/mandos.pid"
2435
pidfilename = "/var/run/mandos.pid"
3104
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2438
pidfile = open(pidfilename, "w")
3105
2439
except IOError as e:
3106
2440
logger.error("Could not open file %r", pidfilename,
3109
for name, group in (("_mandos", "_mandos"),
3110
("mandos", "mandos"),
3111
("nobody", "nogroup")):
2443
for name in ("_mandos", "mandos", "nobody"):
3113
2445
uid = pwd.getpwnam(name).pw_uid
3114
gid = pwd.getpwnam(group).pw_gid
2446
gid = pwd.getpwnam(name).pw_gid
3116
2448
except KeyError:
3125
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3127
2456
except OSError as error:
3128
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3129
.format(uid, gid, os.strerror(error.errno)))
3130
2457
if error.errno != errno.EPERM:
3134
2461
# Enable all possible GnuTLS debugging
3136
2463
# "Use a log level over 10 to enable all debugging options."
3137
2464
# - GnuTLS manual
3138
gnutls.global_set_log_level(11)
2465
gnutls.library.functions.gnutls_global_set_log_level(11)
2467
@gnutls.library.types.gnutls_log_func
3141
2468
def debug_gnutls(level, string):
3142
2469
logger.debug("GnuTLS: %s", string[:-1])
3144
gnutls.global_set_log_function(debug_gnutls)
2471
(gnutls.library.functions
2472
.gnutls_global_set_log_function(debug_gnutls))
3146
2474
# Redirect stdin so all checkers get /dev/null
3147
2475
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
3148
2476
os.dup2(null, sys.stdin.fileno())
3152
2480
# Need to fork before connecting to D-Bus
3153
2481
if not foreground:
3154
2482
# Close all input and output, do double fork, etc.
3157
# multiprocessing will use threads, so before we use GLib we need
3158
# to inform GLib that threads will be used.
2485
# multiprocessing will use threads, so before we use gobject we
2486
# need to inform gobject that threads will be used.
2487
gobject.threads_init()
3161
2489
global main_loop
3162
2490
# From the Avahi example code
3163
2491
DBusGMainLoop(set_as_default=True)
3164
main_loop = GLib.MainLoop()
2492
main_loop = gobject.MainLoop()
3165
2493
bus = dbus.SystemBus()
3166
2494
# End of Avahi example code
3169
2497
bus_name = dbus.service.BusName("se.recompile.Mandos",
3172
old_bus_name = dbus.service.BusName(
3173
"se.bsnet.fukt.Mandos", bus,
3175
except dbus.exceptions.DBusException as e:
2498
bus, do_not_queue=True)
2499
old_bus_name = (dbus.service.BusName
2500
("se.bsnet.fukt.Mandos", bus,
2502
except dbus.exceptions.NameExistsException as e:
3176
2503
logger.error("Disabling D-Bus:", exc_info=e)
3177
2504
use_dbus = False
3178
2505
server_settings["use_dbus"] = False
3179
2506
tcp_server.use_dbus = False
3181
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3182
service = AvahiServiceToSyslog(
3183
name=server_settings["servicename"],
3184
servicetype="_mandos._tcp",
3187
if server_settings["interface"]:
3188
service.interface = if_nametoindex(
3189
server_settings["interface"].encode("utf-8"))
2507
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2508
service = AvahiServiceToSyslog(name =
2509
server_settings["servicename"],
2510
servicetype = "_mandos._tcp",
2511
protocol = protocol, bus = bus)
2512
if server_settings["interface"]:
2513
service.interface = (if_nametoindex
2514
(str(server_settings["interface"])))
3191
2516
global multiprocessing_manager
3192
2517
multiprocessing_manager = multiprocessing.Manager()
3194
2519
client_class = Client
3196
client_class = functools.partial(ClientDBus, bus=bus)
2521
client_class = functools.partial(ClientDBus, bus = bus)
3198
2523
client_settings = Client.config_parser(client_config)
3199
2524
old_client_settings = {}
3200
2525
clients_data = {}
3202
# This is used to redirect stdout and stderr for checker processes
3204
wnull = open(os.devnull, "w") # A writable /dev/null
3205
# Only used if server is running in foreground but not in debug
3207
if debug or not foreground:
3210
2527
# Get client data and settings from last running state.
3211
2528
if server_settings["restore"]:
3213
2530
with open(stored_state_path, "rb") as stored_state:
3214
if sys.version_info.major == 2:
3215
clients_data, old_client_settings = pickle.load(
3218
bytes_clients_data, bytes_old_client_settings = (
3219
pickle.load(stored_state, encoding="bytes"))
3220
# Fix bytes to strings
3223
clients_data = {(key.decode("utf-8")
3224
if isinstance(key, bytes)
3227
bytes_clients_data.items()}
3228
del bytes_clients_data
3229
for key in clients_data:
3230
value = {(k.decode("utf-8")
3231
if isinstance(k, bytes) else k): v
3233
clients_data[key].items()}
3234
clients_data[key] = value
3236
value["client_structure"] = [
3238
if isinstance(s, bytes)
3240
value["client_structure"]]
3242
for k in ("name", "host"):
3243
if isinstance(value[k], bytes):
3244
value[k] = value[k].decode("utf-8")
3245
if not value.has_key("key_id"):
3246
value["key_id"] = ""
3247
elif not value.has_key("fingerprint"):
3248
value["fingerprint"] = ""
3249
# old_client_settings
3251
old_client_settings = {
3252
(key.decode("utf-8")
3253
if isinstance(key, bytes)
3256
bytes_old_client_settings.items()}
3257
del bytes_old_client_settings
3259
for value in old_client_settings.values():
3260
if isinstance(value["host"], bytes):
3261
value["host"] = (value["host"]
2531
clients_data, old_client_settings = (pickle.load
3263
2533
os.remove(stored_state_path)
3264
2534
except IOError as e:
3265
2535
if e.errno == errno.ENOENT:
3266
logger.warning("Could not load persistent state:"
3267
" {}".format(os.strerror(e.errno)))
2536
logger.warning("Could not load persistent state: {0}"
2537
.format(os.strerror(e.errno)))
3269
2539
logger.critical("Could not load persistent state:",
3272
2542
except EOFError as e:
3273
2543
logger.warning("Could not load persistent state: "
2544
"EOFError:", exc_info=e)
3277
2546
with PGPEngine() as pgp:
3278
for client_name, client in clients_data.items():
3279
# Skip removed clients
3280
if client_name not in client_settings:
2547
for client_name, client in clients_data.iteritems():
3283
2548
# Decide which value to use after restoring saved state.
3284
2549
# We have three different values: Old config file,
3285
2550
# new config file, and saved state.
3343
2608
for client_name in (set(client_settings)
3344
2609
- set(old_client_settings)):
3345
2610
clients_data[client_name] = client_settings[client_name]
3347
2612
# Create all client objects
3348
for client_name, client in clients_data.items():
2613
for client_name, client in clients_data.iteritems():
3349
2614
tcp_server.clients[client_name] = client_class(
3352
server_settings=server_settings)
2615
name = client_name, settings = client)
3354
2617
if not tcp_server.clients:
3355
2618
logger.warning("No clients defined")
3357
2620
if not foreground:
3358
2621
if pidfile is not None:
3362
print(pid, file=pidfile)
2625
pidfile.write(str(pid) + "\n".encode("utf-8"))
3363
2626
except IOError:
3364
2627
logger.error("Could not write to file %r with PID %d",
3365
2628
pidfilename, pid)
3367
2630
del pidfilename
3369
for termsig in (signal.SIGHUP, signal.SIGTERM):
3370
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3371
lambda: main_loop.quit() and False)
2632
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2633
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3375
@alternate_dbus_interfaces(
3376
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3377
class MandosDBusService(DBusObjectWithObjectManager):
2636
@alternate_dbus_interfaces({"se.recompile.Mandos":
2637
"se.bsnet.fukt.Mandos"})
2638
class MandosDBusService(DBusObjectWithProperties):
3378
2639
"""A D-Bus proxy object"""
3380
2640
def __init__(self):
3381
2641
dbus.service.Object.__init__(self, bus, "/")
3383
2642
_interface = "se.recompile.Mandos"
2644
@dbus_interface_annotations(_interface)
2646
return { "org.freedesktop.DBus.Property"
2647
".EmitsChangedSignal":
3385
2650
@dbus.service.signal(_interface, signature="o")
3386
2651
def ClientAdded(self, objpath):
3390
2655
@dbus.service.signal(_interface, signature="ss")
3391
def ClientNotFound(self, key_id, address):
2656
def ClientNotFound(self, fingerprint, address):
3395
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3397
2660
@dbus.service.signal(_interface, signature="os")
3398
2661
def ClientRemoved(self, objpath, name):
3402
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3404
2665
@dbus.service.method(_interface, out_signature="ao")
3405
2666
def GetAllClients(self):
3407
return dbus.Array(c.dbus_object_path for c in
3408
tcp_server.clients.values())
3410
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2668
return dbus.Array(c.dbus_object_path
2670
tcp_server.clients.itervalues())
3412
2672
@dbus.service.method(_interface,
3413
2673
out_signature="a{oa{sv}}")
3414
2674
def GetAllClientsWithProperties(self):
3416
2676
return dbus.Dictionary(
3417
{c.dbus_object_path: c.GetAll(
3418
"se.recompile.Mandos.Client")
3419
for c in tcp_server.clients.values()},
2677
((c.dbus_object_path, c.GetAll(""))
2678
for c in tcp_server.clients.itervalues()),
3420
2679
signature="oa{sv}")
3422
2681
@dbus.service.method(_interface, in_signature="o")
3423
2682
def RemoveClient(self, object_path):
3425
for c in tcp_server.clients.values():
2684
for c in tcp_server.clients.itervalues():
3426
2685
if c.dbus_object_path == object_path:
3427
2686
del tcp_server.clients[c.name]
3428
2687
c.remove_from_connection()
3429
# Don't signal the disabling
2688
# Don't signal anything except ClientRemoved
3430
2689
c.disable(quiet=True)
3431
# Emit D-Bus signal for removal
3432
self.client_removed_signal(c)
2691
self.ClientRemoved(object_path, c.name)
3434
2693
raise KeyError(object_path)
3438
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3439
out_signature="a{oa{sa{sv}}}")
3440
def GetManagedObjects(self):
3442
return dbus.Dictionary(
3443
{client.dbus_object_path:
3445
{interface: client.GetAll(interface)
3447
client._get_all_interface_names()})
3448
for client in tcp_server.clients.values()})
3450
def client_added_signal(self, client):
3451
"""Send the new standard signal and the old signal"""
3453
# New standard signal
3454
self.InterfacesAdded(
3455
client.dbus_object_path,
3457
{interface: client.GetAll(interface)
3459
client._get_all_interface_names()}))
3461
self.ClientAdded(client.dbus_object_path)
3463
def client_removed_signal(self, client):
3464
"""Send the new standard signal and the old signal"""
3466
# New standard signal
3467
self.InterfacesRemoved(
3468
client.dbus_object_path,
3469
client._get_all_interface_names())
3471
self.ClientRemoved(client.dbus_object_path,
3474
2697
mandos_dbus_service = MandosDBusService()
3476
# Save modules to variables to exempt the modules from being
3477
# unloaded before the function registered with atexit() is run.
3478
mp = multiprocessing
3482
2700
"Cleanup function; run on exit"
3486
mp.active_children()
2703
multiprocessing.active_children()
3488
2704
if not (tcp_server.clients or client_settings):
3491
2707
# Store client before exiting. Secrets are encrypted with key
3492
2708
# based on what config file has. If config file is
3493
2709
# removed/edited, old secret will thus be unrecovable.
3495
2711
with PGPEngine() as pgp:
3496
for client in tcp_server.clients.values():
2712
for client in tcp_server.clients.itervalues():
3497
2713
key = client_settings[client.name]["secret"]
3498
2714
client.encrypted_secret = pgp.encrypt(client.secret,
3500
2716
client_dict = {}
3502
2718
# A list of attributes that can not be pickled
3504
exclude = {"bus", "changedstate", "secret",
3505
"checker", "server_settings"}
3506
for name, typ in inspect.getmembers(dbus.service
2720
exclude = set(("bus", "changedstate", "secret",
2722
for name, typ in (inspect.getmembers
2723
(dbus.service.Object)):
3508
2724
exclude.add(name)
3510
2726
client_dict["encrypted_secret"] = (client
3511
2727
.encrypted_secret)
3512
2728
for attr in client.client_structure:
3513
2729
if attr not in exclude:
3514
2730
client_dict[attr] = getattr(client, attr)
3516
2732
clients[client.name] = client_dict
3517
2733
del client_settings[client.name]["secret"]
3520
with tempfile.NamedTemporaryFile(
3524
dir=os.path.dirname(stored_state_path),
3525
delete=False) as stored_state:
3526
pickle.dump((clients, client_settings), stored_state,
3528
tempname = stored_state.name
2736
with (tempfile.NamedTemporaryFile
2737
(mode='wb', suffix=".pickle", prefix='clients-',
2738
dir=os.path.dirname(stored_state_path),
2739
delete=False)) as stored_state:
2740
pickle.dump((clients, client_settings), stored_state)
2741
tempname=stored_state.name
3529
2742
os.rename(tempname, stored_state_path)
3530
2743
except (IOError, OSError) as e: