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# -*- mode: python; coding: utf-8 -*-
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# Mandos server - give out binary blobs to connecting clients.
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# This program is partly derived from an example program for an Avahi
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# service publisher, downloaded from
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# <http://avahi.org/wiki/PythonPublishExample>. This includes the
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# methods "add", "remove", "server_state_changed",
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# "entry_group_state_changed", "cleanup", and "activate" in the
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# "AvahiService" class, and some lines in "main".
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# Everything else is
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# Copyright © 2008-2012 Teddy Hogeborn
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# Copyright © 2008-2012 Björn Påhlsson
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# Copyright © 2008-2018 Teddy Hogeborn
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# Copyright © 2008-2018 Björn Påhlsson
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# This file is part of Mandos.
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# Mandos is free software: you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# Mandos is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
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# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
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# Contact the authors at <mandos@recompile.se>.
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from __future__ import (division, absolute_import, print_function,
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from future_builtins import *
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from future_builtins import *
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import SocketServer as socketserver
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import SocketServer as socketserver
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import gnutls.connection
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import gnutls.library.functions
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import gnutls.library.constants
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import gnutls.library.types
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import ConfigParser as configparser
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import ConfigParser as configparser
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import cPickle as pickle
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import cPickle as pickle
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import multiprocessing
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import dbus.service
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from gi.repository import GLib
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from dbus.mainloop.glib import DBusGMainLoop
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import xml.dom.minidom
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# Try to find the value of SO_BINDTODEVICE:
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# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
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# newer, and it is also the most natural place for it:
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SO_BINDTODEVICE = socket.SO_BINDTODEVICE
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except AttributeError:
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# This is where SO_BINDTODEVICE was up to and including Python
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from IN import SO_BINDTODEVICE
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except ImportError:
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SO_BINDTODEVICE = None
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# In Python 2.7 it seems to have been removed entirely.
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# Try running the C preprocessor:
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cc = subprocess.Popen(["cc", "--language=c", "-E",
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE)
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stdout = cc.communicate(
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"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
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SO_BINDTODEVICE = int(stdout.splitlines()[-1])
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except (OSError, ValueError, IndexError):
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SO_BINDTODEVICE = None
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if sys.version_info.major == 2:
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stored_state_file = "clients.pickle"
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logger = logging.getLogger()
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syslogger = (logging.handlers.SysLogHandler
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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = str("/dev/log")))
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if_nametoindex = (ctypes.cdll.LoadLibrary
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(ctypes.util.find_library("c"))
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if_nametoindex = ctypes.cdll.LoadLibrary(
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ctypes.util.find_library("c")).if_nametoindex
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except (OSError, AttributeError):
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def if_nametoindex(interface):
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"Get an interface index the hard way, i.e. using fcntl()"
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SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
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with contextlib.closing(socket.socket()) as s:
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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
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struct.pack(str("16s16x"),
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interface_index = struct.unpack(str("I"),
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struct.pack(b"16s16x", interface))
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interface_index = struct.unpack("I", ifreq[16:20])[0]
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return interface_index
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def copy_function(func):
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"""Make a copy of a function"""
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if sys.version_info.major == 2:
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return types.FunctionType(func.func_code,
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return types.FunctionType(func.__code__,
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def initlogger(debug, level=logging.WARNING):
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"""init logger and add loglevel"""
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syslogger = (logging.handlers.SysLogHandler(
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facility=logging.handlers.SysLogHandler.LOG_DAEMON,
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syslogger.setFormatter(logging.Formatter
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('Mandos [%(process)d]: %(levelname)s:'
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logger.addHandler(syslogger)
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console = logging.StreamHandler()
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console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
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os.rmdir(self.tempdir)
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self.tempdir = None
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def password_encode(self, password):
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# Passphrase can not be empty and can not contain newlines or
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# NUL bytes. So we prefix it and hex encode it.
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return b"mandos" + binascii.hexlify(password)
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encoded = b"mandos" + binascii.hexlify(password)
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if len(encoded) > 2048:
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# GnuPG can't handle long passwords, so encode differently
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encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
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.replace(b"\n", b"\\n")
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.replace(b"\0", b"\\x00"))
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def encrypt(self, data, password):
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self.gnupg.passphrase = self.password_encode(password)
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with open(os.devnull, "w") as devnull:
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proc = self.gnupg.run(['--symmetric'],
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create_fhs=['stdin', 'stdout'],
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attach_fhs={'stderr': devnull})
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with contextlib.closing(proc.handles['stdin']) as f:
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with contextlib.closing(proc.handles['stdout']) as f:
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ciphertext = f.read()
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self.gnupg.passphrase = None
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passphrase = self.password_encode(password)
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with tempfile.NamedTemporaryFile(
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dir=self.tempdir) as passfile:
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passfile.write(passphrase)
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proc = subprocess.Popen([self.gpg, '--symmetric',
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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ciphertext, err = proc.communicate(input=data)
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if proc.returncode != 0:
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return ciphertext
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def decrypt(self, data, password):
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self.gnupg.passphrase = self.password_encode(password)
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with open(os.devnull, "w") as devnull:
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proc = self.gnupg.run(['--decrypt'],
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create_fhs=['stdin', 'stdout'],
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attach_fhs={'stderr': devnull})
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with contextlib.closing(proc.handles['stdin']) as f:
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with contextlib.closing(proc.handles['stdout']) as f:
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decrypted_plaintext = f.read()
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self.gnupg.passphrase = None
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passphrase = self.password_encode(password)
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with tempfile.NamedTemporaryFile(
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dir=self.tempdir) as passfile:
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passfile.write(passphrase)
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proc = subprocess.Popen([self.gpg, '--decrypt',
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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decrypted_plaintext, err = proc.communicate(input=data)
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if proc.returncode != 0:
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return decrypted_plaintext
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# Pretend that we have an Avahi module
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"""This isn't so much a class as it is a module-like namespace.
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It is instantiated once, and simulates having an Avahi module."""
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IF_UNSPEC = -1 # avahi-common/address.h
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PROTO_UNSPEC = -1 # avahi-common/address.h
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PROTO_INET = 0 # avahi-common/address.h
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PROTO_INET6 = 1 # avahi-common/address.h
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DBUS_NAME = "org.freedesktop.Avahi"
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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
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DBUS_PATH_SERVER = "/"
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def string_array_to_txt_array(self, t):
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return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
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for s in t), signature="ay")
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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
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SERVER_INVALID = 0 # avahi-common/defs.h
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SERVER_REGISTERING = 1 # avahi-common/defs.h
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SERVER_RUNNING = 2 # avahi-common/defs.h
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SERVER_COLLISION = 3 # avahi-common/defs.h
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SERVER_FAILURE = 4 # avahi-common/defs.h
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class AvahiError(Exception):
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def __init__(self, value, *args, **kwargs):
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self.value = value
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super(AvahiError, self).__init__(value, *args, **kwargs)
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def __unicode__(self):
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return unicode(repr(self.value))
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return super(AvahiError, self).__init__(value, *args,
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class AvahiServiceError(AvahiError):
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class AvahiGroupError(AvahiError):
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class AvahiService(object):
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"""An Avahi (Zeroconf) service.
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interface: integer; avahi.IF_UNSPEC or an interface index.
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Used to optionally bind to the specified interface.
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name: string; Example: 'Mandos'
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type: string; Example: '_mandos._tcp'.
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See <http://www.dns-sd.org/ServiceTypes.html>
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See <https://www.iana.org/assignments/service-names-port-numbers>
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port: integer; what port to announce
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TXT: list of strings; TXT record for the service
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domain: string; Domain to publish on, default to .local if empty.
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follow_name_owner_changes=True),
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avahi.DBUS_INTERFACE_SERVER)
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self.server.connect_to_signal("StateChanged",
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self.server_state_changed)
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self.server_state_changed)
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self.server_state_changed(self.server.GetState())
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class AvahiServiceToSyslog(AvahiService):
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def rename(self, *args, **kwargs):
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"""Add the new name to the syslog messages"""
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ret = AvahiService.rename(self)
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syslogger.setFormatter(logging.Formatter
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('Mandos ({0}) [%(process)d]:'
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' %(levelname)s: %(message)s'
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ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
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syslogger.setFormatter(logging.Formatter(
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'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
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def timedelta_to_milliseconds(td):
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"Convert a datetime.timedelta() to milliseconds"
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return ((td.days * 24 * 60 * 60 * 1000)
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+ (td.seconds * 1000)
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+ (td.microseconds // 1000))
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# Pretend that we have a GnuTLS module
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class GnuTLS(object):
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"""This isn't so much a class as it is a module-like namespace.
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It is instantiated once, and simulates having a GnuTLS module."""
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library = ctypes.util.find_library("gnutls")
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library = ctypes.util.find_library("gnutls-deb0")
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_library = ctypes.cdll.LoadLibrary(library)
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_need_version = b"3.3.0"
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# Need to use "self" here, since this method is called before
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# the assignment to the "gnutls" global variable happens.
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if self.check_version(self._need_version) is None:
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raise self.Error("Needs GnuTLS {} or later"
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.format(self._need_version))
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# Unless otherwise indicated, the constants and types below are
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# all from the gnutls/gnutls.h C header file.
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E_NO_CERTIFICATE_FOUND = -49
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OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
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class session_int(ctypes.Structure):
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session_t = ctypes.POINTER(session_int)
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class certificate_credentials_st(ctypes.Structure):
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certificate_credentials_t = ctypes.POINTER(
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certificate_credentials_st)
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certificate_type_t = ctypes.c_int
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class datum_t(ctypes.Structure):
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_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
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('size', ctypes.c_uint)]
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class openpgp_crt_int(ctypes.Structure):
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openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
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openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
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log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
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credentials_type_t = ctypes.c_int
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transport_ptr_t = ctypes.c_void_p
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close_request_t = ctypes.c_int
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class Error(Exception):
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# We need to use the class name "GnuTLS" here, since this
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# exception might be raised from within GnuTLS.__init__,
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# which is called before the assignment to the "gnutls"
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# global variable has happened.
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def __init__(self, message=None, code=None, args=()):
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# Default usage is by a message string, but if a return
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# code is passed, convert it to a string with
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if message is None and code is not None:
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message = GnuTLS.strerror(code)
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return super(GnuTLS.Error, self).__init__(
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class CertificateSecurityError(Error):
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class Credentials(object):
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self._c_object = gnutls.certificate_credentials_t()
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gnutls.certificate_allocate_credentials(
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ctypes.byref(self._c_object))
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self.type = gnutls.CRD_CERTIFICATE
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gnutls.certificate_free_credentials(self._c_object)
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class ClientSession(object):
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def __init__(self, socket, credentials=None):
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self._c_object = gnutls.session_t()
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gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
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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
629
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
680
handshake_set_private_extensions = (
681
_library.gnutls_handshake_set_private_extensions)
682
handshake_set_private_extensions.argtypes = [session_t,
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handshake_set_private_extensions.restype = None
686
credentials_set = _library.gnutls_credentials_set
687
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)
704
global_set_log_level = _library.gnutls_global_set_log_level
705
global_set_log_level.argtypes = [ctypes.c_int]
706
global_set_log_level.restype = None
708
global_set_log_function = _library.gnutls_global_set_log_function
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global_set_log_function.argtypes = [log_func]
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global_set_log_function.restype = None
712
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]
718
handshake.restype = _error_code
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handshake.errcheck = _retry_on_error
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transport_set_ptr = _library.gnutls_transport_set_ptr
722
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
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transport_set_ptr.restype = None
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bye = _library.gnutls_bye
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bye.argtypes = [session_t, close_request_t]
727
bye.restype = _error_code
728
bye.errcheck = _retry_on_error
730
check_version = _library.gnutls_check_version
731
check_version.argtypes = [ctypes.c_char_p]
732
check_version.restype = ctypes.c_char_p
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# All the function declarations below are from gnutls/openpgp.h
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openpgp_crt_init = _library.gnutls_openpgp_crt_init
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openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
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openpgp_crt_init.restype = _error_code
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openpgp_crt_import = _library.gnutls_openpgp_crt_import
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openpgp_crt_import.argtypes = [openpgp_crt_t,
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ctypes.POINTER(datum_t),
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openpgp_crt_import.restype = _error_code
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openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
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openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
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ctypes.POINTER(ctypes.c_uint)]
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openpgp_crt_verify_self.restype = _error_code
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openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
752
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
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openpgp_crt_deinit.restype = None
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openpgp_crt_get_fingerprint = (
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_library.gnutls_openpgp_crt_get_fingerprint)
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openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
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openpgp_crt_get_fingerprint.restype = _error_code
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# Remove non-public functions
764
del _error_code, _retry_on_error
765
# Create the global "gnutls" object, simulating a module
769
def call_pipe(connection, # : multiprocessing.Connection
770
func, *args, **kwargs):
771
"""This function is meant to be called by multiprocessing.Process
773
This function runs func(*args, **kwargs), and writes the resulting
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return value on the provided multiprocessing.Connection.
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connection.send(func(*args, **kwargs))
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780
class Client(object):
402
781
"""A representation of a client host served by this server.
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approved: bool(); 'None' if not yet approved/disapproved
406
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approval_delay: datetime.timedelta(); Time to wait for approval
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runtime_expansions: Allowed attributes for runtime expansion.
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expires: datetime.datetime(); time (UTC) when a client will be
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disabled, or None
823
server_settings: The server_settings dict from main()
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runtime_expansions = ("approval_delay", "approval_duration",
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"created", "enabled", "expires",
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"fingerprint", "host", "interval",
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"last_approval_request", "last_checked_ok",
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"last_enabled", "name", "timeout")
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client_defaults = { "timeout": "5m",
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"extended_timeout": "15m",
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"checker": "fping -q -- %%(host)s",
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"approval_delay": "0s",
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"approval_duration": "1s",
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"approved_by_default": "True",
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def timeout_milliseconds(self):
461
"Return the 'timeout' attribute in milliseconds"
462
return timedelta_to_milliseconds(self.timeout)
464
def extended_timeout_milliseconds(self):
465
"Return the 'extended_timeout' attribute in milliseconds"
466
return timedelta_to_milliseconds(self.extended_timeout)
468
def interval_milliseconds(self):
469
"Return the 'interval' attribute in milliseconds"
470
return timedelta_to_milliseconds(self.interval)
472
def approval_delay_milliseconds(self):
473
return timedelta_to_milliseconds(self.approval_delay)
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"extended_timeout": "PT15M",
835
"checker": "fping -q -- %%(host)s",
837
"approval_delay": "PT0S",
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"approval_duration": "PT1S",
839
"approved_by_default": "True",
476
844
def config_parser(config):
477
845
"""Construct a new dict of client settings of this form:
590
960
logger.info("Disabling client %s", self.name)
591
961
if getattr(self, "disable_initiator_tag", None) is not None:
592
gobject.source_remove(self.disable_initiator_tag)
962
GLib.source_remove(self.disable_initiator_tag)
593
963
self.disable_initiator_tag = None
594
964
self.expires = None
595
965
if getattr(self, "checker_initiator_tag", None) is not None:
596
gobject.source_remove(self.checker_initiator_tag)
966
GLib.source_remove(self.checker_initiator_tag)
597
967
self.checker_initiator_tag = None
598
968
self.stop_checker()
599
969
self.enabled = False
601
971
self.send_changedstate()
602
# Do not run this again if called by a gobject.timeout_add
972
# Do not run this again if called by a GLib.timeout_add
605
975
def __del__(self):
608
978
def init_checker(self):
609
979
# Schedule a new checker to be started an 'interval' from now,
610
980
# and every interval from then on.
611
981
if self.checker_initiator_tag is not None:
612
gobject.source_remove(self.checker_initiator_tag)
613
self.checker_initiator_tag = (gobject.timeout_add
614
(self.interval_milliseconds(),
982
GLib.source_remove(self.checker_initiator_tag)
983
self.checker_initiator_tag = GLib.timeout_add(
984
int(self.interval.total_seconds() * 1000),
616
986
# Schedule a disable() when 'timeout' has passed
617
987
if self.disable_initiator_tag is not None:
618
gobject.source_remove(self.disable_initiator_tag)
619
self.disable_initiator_tag = (gobject.timeout_add
620
(self.timeout_milliseconds(),
988
GLib.source_remove(self.disable_initiator_tag)
989
self.disable_initiator_tag = GLib.timeout_add(
990
int(self.timeout.total_seconds() * 1000), self.disable)
622
991
# Also start a new checker *right now*.
623
992
self.start_checker()
625
def checker_callback(self, pid, condition, command):
994
def checker_callback(self, source, condition, connection,
626
996
"""The checker has completed, so take appropriate actions."""
627
997
self.checker_callback_tag = None
628
998
self.checker = None
629
if os.WIFEXITED(condition):
630
self.last_checker_status = os.WEXITSTATUS(condition)
999
# Read return code from connection (see call_pipe)
1000
returncode = connection.recv()
1004
self.last_checker_status = returncode
1005
self.last_checker_signal = None
631
1006
if self.last_checker_status == 0:
632
1007
logger.info("Checker for %(name)s succeeded",
634
1009
self.checked_ok()
636
logger.info("Checker for %(name)s failed",
1011
logger.info("Checker for %(name)s failed", vars(self))
639
1013
self.last_checker_status = -1
1014
self.last_checker_signal = -returncode
640
1015
logger.warning("Checker for %(name)s crashed?",
643
1019
def checked_ok(self):
644
1020
"""Assert that the client has been seen, alive and well."""
645
1021
self.last_checked_ok = datetime.datetime.utcnow()
646
1022
self.last_checker_status = 0
1023
self.last_checker_signal = None
647
1024
self.bump_timeout()
649
1026
def bump_timeout(self, timeout=None):
650
1027
"""Bump up the timeout for this client."""
651
1028
if timeout is None:
652
1029
timeout = self.timeout
653
1030
if self.disable_initiator_tag is not None:
654
gobject.source_remove(self.disable_initiator_tag)
1031
GLib.source_remove(self.disable_initiator_tag)
655
1032
self.disable_initiator_tag = None
656
1033
if getattr(self, "enabled", False):
657
self.disable_initiator_tag = (gobject.timeout_add
658
(timedelta_to_milliseconds
659
(timeout), self.disable))
1034
self.disable_initiator_tag = GLib.timeout_add(
1035
int(timeout.total_seconds() * 1000), self.disable)
660
1036
self.expires = datetime.datetime.utcnow() + timeout
662
1038
def need_approval(self):
663
1039
self.last_approval_request = datetime.datetime.utcnow()
665
1041
def start_checker(self):
666
1042
"""Start a new checker subprocess if one is not running.
668
1044
If a checker already exists, leave it running and do
670
1046
# The reason for not killing a running checker is that if we
675
1051
# checkers alone, the checker would have to take more time
676
1052
# than 'timeout' for the client to be disabled, which is as it
679
# If a checker exists, make sure it is not a zombie
681
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
682
except (AttributeError, OSError) as error:
683
if (isinstance(error, OSError)
684
and error.errno != errno.ECHILD):
688
logger.warning("Checker was a zombie")
689
gobject.source_remove(self.checker_callback_tag)
690
self.checker_callback(pid, status,
691
self.current_checker_command)
1055
if self.checker is not None and not self.checker.is_alive():
1056
logger.warning("Checker was not alive; joining")
692
1059
# Start a new checker if needed
693
1060
if self.checker is None:
694
1061
# Escape attributes for the shell
695
escaped_attrs = dict(
696
(attr, re.escape(unicode(getattr(self, attr))))
698
self.runtime_expansions)
1063
attr: re.escape(str(getattr(self, attr)))
1064
for attr in self.runtime_expansions}
700
1066
command = self.checker_command % escaped_attrs
701
1067
except TypeError as error:
702
1068
logger.error('Could not format string "%s"',
703
self.checker_command, exc_info=error)
704
return True # Try again later
1069
self.checker_command,
1071
return True # Try again later
705
1072
self.current_checker_command = command
707
logger.info("Starting checker %r for %s",
709
# We don't need to redirect stdout and stderr, since
710
# in normal mode, that is already done by daemon(),
711
# and in debug mode we don't want to. (Stdin is
712
# always replaced by /dev/null.)
713
self.checker = subprocess.Popen(command,
716
except OSError as error:
717
logger.error("Failed to start subprocess",
719
self.checker_callback_tag = (gobject.child_watch_add
721
self.checker_callback,
723
# The checker may have completed before the gobject
724
# watch was added. Check for this.
725
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
727
gobject.source_remove(self.checker_callback_tag)
728
self.checker_callback(pid, status, command)
729
# Re-run this periodically if run by gobject.timeout_add
1073
logger.info("Starting checker %r for %s", command,
1075
# We don't need to redirect stdout and stderr, since
1076
# in normal mode, that is already done by daemon(),
1077
# and in debug mode we don't want to. (Stdin is
1078
# always replaced by /dev/null.)
1079
# The exception is when not debugging but nevertheless
1080
# running in the foreground; use the previously
1082
popen_args = {"close_fds": True,
1085
if (not self.server_settings["debug"]
1086
and self.server_settings["foreground"]):
1087
popen_args.update({"stdout": wnull,
1089
pipe = multiprocessing.Pipe(duplex=False)
1090
self.checker = multiprocessing.Process(
1092
args=(pipe[1], subprocess.call, command),
1094
self.checker.start()
1095
self.checker_callback_tag = GLib.io_add_watch(
1096
pipe[0].fileno(), GLib.IO_IN,
1097
self.checker_callback, pipe[0], command)
1098
# Re-run this periodically if run by GLib.timeout_add
732
1101
def stop_checker(self):
733
1102
"""Force the checker process, if any, to stop."""
734
1103
if self.checker_callback_tag:
735
gobject.source_remove(self.checker_callback_tag)
1104
GLib.source_remove(self.checker_callback_tag)
736
1105
self.checker_callback_tag = None
737
1106
if getattr(self, "checker", None) is None:
739
1108
logger.debug("Stopping checker for %(name)s", vars(self))
741
self.checker.terminate()
743
#if self.checker.poll() is None:
744
# self.checker.kill()
745
except OSError as error:
746
if error.errno != errno.ESRCH: # No such process
1109
self.checker.terminate()
748
1110
self.checker = None
751
def dbus_service_property(dbus_interface, signature="v",
752
access="readwrite", byte_arrays=False):
1113
def dbus_service_property(dbus_interface,
753
1117
"""Decorators for marking methods of a DBusObjectWithProperties to
754
1118
become properties on the D-Bus.
756
1120
The decorated method will be called with no arguments by "Get"
757
1121
and with one argument by "Set".
759
1123
The parameters, where they are supported, are the same as
760
1124
dbus.service.method, except there is only "signature", since the
761
1125
type from Get() and the type sent to Set() is the same.
837
class DBusObjectWithProperties(dbus.service.Object):
838
"""A D-Bus object with properties.
840
Classes inheriting from this can use the dbus_service_property
841
decorator to expose methods as D-Bus properties. It exposes the
842
standard Get(), Set(), and GetAll() methods on the D-Bus.
1208
class DBusObjectWithAnnotations(dbus.service.Object):
1209
"""A D-Bus object with annotations.
1211
Classes inheriting from this can use the dbus_annotations
1212
decorator to add annotations to methods or signals.
846
1216
def _is_dbus_thing(thing):
847
1217
"""Returns a function testing if an attribute is a D-Bus thing
849
1219
If called like _is_dbus_thing("method") it returns a function
850
1220
suitable for use as predicate to inspect.getmembers().
852
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
1222
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
855
1225
def _get_all_dbus_things(self, thing):
856
1226
"""Returns a generator of (name, attribute) pairs
858
return ((getattr(athing.__get__(self), "_dbus_name",
1228
return ((getattr(athing.__get__(self), "_dbus_name", name),
860
1229
athing.__get__(self))
861
1230
for cls in self.__class__.__mro__
862
1231
for name, athing in
863
inspect.getmembers(cls,
864
self._is_dbus_thing(thing)))
1232
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1234
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1236
path_keyword='object_path',
1237
connection_keyword='connection')
1238
def Introspect(self, object_path, connection):
1239
"""Overloading of standard D-Bus method.
1241
Inserts annotation tags on methods and signals.
1243
xmlstring = dbus.service.Object.Introspect(self, object_path,
1246
document = xml.dom.minidom.parseString(xmlstring)
1248
for if_tag in document.getElementsByTagName("interface"):
1249
# Add annotation tags
1250
for typ in ("method", "signal"):
1251
for tag in if_tag.getElementsByTagName(typ):
1253
for name, prop in (self.
1254
_get_all_dbus_things(typ)):
1255
if (name == tag.getAttribute("name")
1256
and prop._dbus_interface
1257
== if_tag.getAttribute("name")):
1258
annots.update(getattr(
1259
prop, "_dbus_annotations", {}))
1260
for name, value in annots.items():
1261
ann_tag = document.createElement(
1263
ann_tag.setAttribute("name", name)
1264
ann_tag.setAttribute("value", value)
1265
tag.appendChild(ann_tag)
1266
# Add interface annotation tags
1267
for annotation, value in dict(
1268
itertools.chain.from_iterable(
1269
annotations().items()
1270
for name, annotations
1271
in self._get_all_dbus_things("interface")
1272
if name == if_tag.getAttribute("name")
1274
ann_tag = document.createElement("annotation")
1275
ann_tag.setAttribute("name", annotation)
1276
ann_tag.setAttribute("value", value)
1277
if_tag.appendChild(ann_tag)
1278
# Fix argument name for the Introspect method itself
1279
if (if_tag.getAttribute("name")
1280
== dbus.INTROSPECTABLE_IFACE):
1281
for cn in if_tag.getElementsByTagName("method"):
1282
if cn.getAttribute("name") == "Introspect":
1283
for arg in cn.getElementsByTagName("arg"):
1284
if (arg.getAttribute("direction")
1286
arg.setAttribute("name",
1288
xmlstring = document.toxml("utf-8")
1290
except (AttributeError, xml.dom.DOMException,
1291
xml.parsers.expat.ExpatError) as error:
1292
logger.error("Failed to override Introspection method",
1297
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1298
"""A D-Bus object with properties.
1300
Classes inheriting from this can use the dbus_service_property
1301
decorator to expose methods as D-Bus properties. It exposes the
1302
standard Get(), Set(), and GetAll() methods on the D-Bus.
866
1305
def _get_dbus_property(self, interface_name, property_name):
867
1306
"""Returns a bound method if one exists which is a D-Bus
868
1307
property with the specified name and interface.
870
for cls in self.__class__.__mro__:
871
for name, value in (inspect.getmembers
873
self._is_dbus_thing("property"))):
1309
for cls in self.__class__.__mro__:
1310
for name, value in inspect.getmembers(
1311
cls, self._is_dbus_thing("property")):
874
1312
if (value._dbus_name == property_name
875
1313
and value._dbus_interface == interface_name):
876
1314
return value.__get__(self)
878
1316
# No such property
879
raise DBusPropertyNotFound(self.dbus_object_path + ":"
880
+ interface_name + "."
883
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1317
raise DBusPropertyNotFound("{}:{}.{}".format(
1318
self.dbus_object_path, interface_name, property_name))
1321
def _get_all_interface_names(cls):
1322
"""Get a sequence of all interfaces supported by an object"""
1323
return (name for name in set(getattr(getattr(x, attr),
1324
"_dbus_interface", None)
1325
for x in (inspect.getmro(cls))
1327
if name is not None)
1329
@dbus.service.method(dbus.PROPERTIES_IFACE,
884
1331
out_signature="v")
885
1332
def Get(self, interface_name, property_name):
886
1333
"""Standard D-Bus property Get() method, see D-Bus standard.
1016
1462
return xmlstring
1466
dbus.OBJECT_MANAGER_IFACE
1467
except AttributeError:
1468
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1471
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1472
"""A D-Bus object with an ObjectManager.
1474
Classes inheriting from this exposes the standard
1475
GetManagedObjects call and the InterfacesAdded and
1476
InterfacesRemoved signals on the standard
1477
"org.freedesktop.DBus.ObjectManager" interface.
1479
Note: No signals are sent automatically; they must be sent
1482
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1483
out_signature="a{oa{sa{sv}}}")
1484
def GetManagedObjects(self):
1485
"""This function must be overridden"""
1486
raise NotImplementedError()
1488
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1489
signature="oa{sa{sv}}")
1490
def InterfacesAdded(self, object_path, interfaces_and_properties):
1493
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1494
def InterfacesRemoved(self, object_path, interfaces):
1497
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1499
path_keyword='object_path',
1500
connection_keyword='connection')
1501
def Introspect(self, object_path, connection):
1502
"""Overloading of standard D-Bus method.
1504
Override return argument name of GetManagedObjects to be
1505
"objpath_interfaces_and_properties"
1507
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1511
document = xml.dom.minidom.parseString(xmlstring)
1513
for if_tag in document.getElementsByTagName("interface"):
1514
# Fix argument name for the GetManagedObjects method
1515
if (if_tag.getAttribute("name")
1516
== dbus.OBJECT_MANAGER_IFACE):
1517
for cn in if_tag.getElementsByTagName("method"):
1518
if (cn.getAttribute("name")
1519
== "GetManagedObjects"):
1520
for arg in cn.getElementsByTagName("arg"):
1521
if (arg.getAttribute("direction")
1525
"objpath_interfaces"
1527
xmlstring = document.toxml("utf-8")
1529
except (AttributeError, xml.dom.DOMException,
1530
xml.parsers.expat.ExpatError) as error:
1531
logger.error("Failed to override Introspection method",
1019
1536
def datetime_to_dbus(dt, variant_level=0):
1020
1537
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1022
return dbus.String("", variant_level = variant_level)
1023
return dbus.String(dt.isoformat(),
1024
variant_level=variant_level)
1539
return dbus.String("", variant_level=variant_level)
1540
return dbus.String(dt.isoformat(), variant_level=variant_level)
1027
1543
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1057
1574
# Ignore non-D-Bus attributes, and D-Bus attributes
1058
1575
# with the wrong interface name
1059
1576
if (not hasattr(attribute, "_dbus_interface")
1060
or not attribute._dbus_interface
1061
.startswith(orig_interface_name)):
1577
or not attribute._dbus_interface.startswith(
1578
orig_interface_name)):
1063
1580
# Create an alternate D-Bus interface name based on
1064
1581
# the current name
1065
alt_interface = (attribute._dbus_interface
1066
.replace(orig_interface_name,
1067
alt_interface_name))
1582
alt_interface = attribute._dbus_interface.replace(
1583
orig_interface_name, alt_interface_name)
1068
1584
interface_names.add(alt_interface)
1069
1585
# Is this a D-Bus signal?
1070
1586
if getattr(attribute, "_dbus_is_signal", False):
1071
# Extract the original non-method function by
1073
nonmethod_func = (dict(
1587
# Extract the original non-method undecorated
1588
# function by black magic
1589
if sys.version_info.major == 2:
1590
nonmethod_func = (dict(
1074
1591
zip(attribute.func_code.co_freevars,
1075
attribute.__closure__))["func"]
1592
attribute.__closure__))
1593
["func"].cell_contents)
1595
nonmethod_func = (dict(
1596
zip(attribute.__code__.co_freevars,
1597
attribute.__closure__))
1598
["func"].cell_contents)
1077
1599
# Create a new, but exactly alike, function
1078
1600
# object, and decorate it to be a new D-Bus signal
1079
1601
# with the alternate D-Bus interface name
1080
new_function = (dbus.service.signal
1082
attribute._dbus_signature)
1083
(types.FunctionType(
1084
nonmethod_func.func_code,
1085
nonmethod_func.func_globals,
1086
nonmethod_func.func_name,
1087
nonmethod_func.func_defaults,
1088
nonmethod_func.func_closure)))
1602
new_function = copy_function(nonmethod_func)
1603
new_function = (dbus.service.signal(
1605
attribute._dbus_signature)(new_function))
1089
1606
# Copy annotations, if any
1091
new_function._dbus_annotations = (
1092
dict(attribute._dbus_annotations))
1608
new_function._dbus_annotations = dict(
1609
attribute._dbus_annotations)
1093
1610
except AttributeError:
1095
1613
# Define a creator of a function to call both the
1096
1614
# original and alternate functions, so both the
1097
1615
# original and alternate signals gets sent when
1187
1698
if interface_names:
1188
1699
# Replace the class with a new subclass of it with
1189
1700
# methods, signals, etc. as created above.
1190
cls = type(b"{0}Alternate".format(cls.__name__),
1701
if sys.version_info.major == 2:
1702
cls = type(b"{}Alternate".format(cls.__name__),
1705
cls = type("{}Alternate".format(cls.__name__),
1196
1712
@alternate_dbus_interfaces({"se.recompile.Mandos":
1197
"se.bsnet.fukt.Mandos"})
1713
"se.bsnet.fukt.Mandos"})
1198
1714
class ClientDBus(Client, DBusObjectWithProperties):
1199
1715
"""A Client class using D-Bus
1202
1718
dbus_object_path: dbus.ObjectPath
1203
1719
bus: dbus.SystemBus()
1206
1722
runtime_expansions = (Client.runtime_expansions
1207
+ ("dbus_object_path",))
1723
+ ("dbus_object_path", ))
1725
_interface = "se.recompile.Mandos.Client"
1209
1727
# dbus.service.Object doesn't use super(), so we can't either.
1211
def __init__(self, bus = None, *args, **kwargs):
1729
def __init__(self, bus=None, *args, **kwargs):
1213
1731
Client.__init__(self, *args, **kwargs)
1214
1732
# Only now, when this client is initialized, can it show up on
1216
client_object_name = unicode(self.name).translate(
1734
client_object_name = str(self.name).translate(
1217
1735
{ord("."): ord("_"),
1218
1736
ord("-"): ord("_")})
1219
self.dbus_object_path = (dbus.ObjectPath
1220
("/clients/" + client_object_name))
1737
self.dbus_object_path = dbus.ObjectPath(
1738
"/clients/" + client_object_name)
1221
1739
DBusObjectWithProperties.__init__(self, self.bus,
1222
1740
self.dbus_object_path)
1224
def notifychangeproperty(transform_func,
1225
dbus_name, type_func=lambda x: x,
1742
def notifychangeproperty(transform_func, dbus_name,
1743
type_func=lambda x: x,
1745
invalidate_only=False,
1746
_interface=_interface):
1227
1747
""" Modify a variable so that it's a property which announces
1228
1748
its changes to DBus.
1230
1750
transform_fun: Function that takes a value and a variant_level
1231
1751
and transforms it to a D-Bus type.
1232
1752
dbus_name: D-Bus name of the variable
1297
1828
if hasattr(DBusObjectWithProperties, "__del__"):
1298
1829
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1299
1830
Client.__del__(self, *args, **kwargs)
1301
def checker_callback(self, pid, condition, command,
1303
self.checker_callback_tag = None
1305
if os.WIFEXITED(condition):
1306
exitstatus = os.WEXITSTATUS(condition)
1832
def checker_callback(self, source, condition,
1833
connection, command, *args, **kwargs):
1834
ret = Client.checker_callback(self, source, condition,
1835
connection, command, *args,
1837
exitstatus = self.last_checker_status
1307
1839
# Emit D-Bus signal
1308
1840
self.CheckerCompleted(dbus.Int16(exitstatus),
1309
dbus.Int64(condition),
1841
# This is specific to GNU libC
1842
dbus.Int64(exitstatus << 8),
1310
1843
dbus.String(command))
1312
1845
# Emit D-Bus signal
1313
1846
self.CheckerCompleted(dbus.Int16(-1),
1314
dbus.Int64(condition),
1848
# This is specific to GNU libC
1850
| self.last_checker_signal),
1315
1851
dbus.String(command))
1317
return Client.checker_callback(self, pid, condition, command,
1320
1854
def start_checker(self, *args, **kwargs):
1321
old_checker = self.checker
1322
if self.checker is not None:
1323
old_checker_pid = self.checker.pid
1325
old_checker_pid = None
1855
old_checker_pid = getattr(self.checker, "pid", None)
1326
1856
r = Client.start_checker(self, *args, **kwargs)
1327
1857
# Only if new checker process was started
1328
1858
if (self.checker is not None
1380
1904
server to mandos-client
1384
1908
# Rejected - signal
1385
1909
@dbus.service.signal(_interface, signature="s")
1386
1910
def Rejected(self, reason):
1390
1914
# NeedApproval - signal
1391
1915
@dbus.service.signal(_interface, signature="tb")
1392
1916
def NeedApproval(self, timeout, default):
1394
1918
return self.need_approval()
1398
1922
# Approve - method
1399
1923
@dbus.service.method(_interface, in_signature="b")
1400
1924
def Approve(self, value):
1401
1925
self.approve(value)
1403
1927
# CheckedOK - method
1404
1928
@dbus.service.method(_interface)
1405
1929
def CheckedOK(self):
1406
1930
self.checked_ok()
1408
1932
# Enable - method
1933
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1409
1934
@dbus.service.method(_interface)
1410
1935
def Enable(self):
1414
1939
# StartChecker - method
1940
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1415
1941
@dbus.service.method(_interface)
1416
1942
def StartChecker(self):
1418
1944
self.start_checker()
1420
1946
# Disable - method
1947
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1421
1948
@dbus.service.method(_interface)
1422
1949
def Disable(self):
1426
1953
# StopChecker - method
1954
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1427
1955
@dbus.service.method(_interface)
1428
1956
def StopChecker(self):
1429
1957
self.stop_checker()
1433
1961
# ApprovalPending - property
1434
1962
@dbus_service_property(_interface, signature="b", access="read")
1435
1963
def ApprovalPending_dbus_property(self):
1436
1964
return dbus.Boolean(bool(self.approvals_pending))
1438
1966
# ApprovedByDefault - property
1439
@dbus_service_property(_interface, signature="b",
1967
@dbus_service_property(_interface,
1440
1969
access="readwrite")
1441
1970
def ApprovedByDefault_dbus_property(self, value=None):
1442
1971
if value is None: # get
1443
1972
return dbus.Boolean(self.approved_by_default)
1444
1973
self.approved_by_default = bool(value)
1446
1975
# ApprovalDelay - property
1447
@dbus_service_property(_interface, signature="t",
1976
@dbus_service_property(_interface,
1448
1978
access="readwrite")
1449
1979
def ApprovalDelay_dbus_property(self, value=None):
1450
1980
if value is None: # get
1451
return dbus.UInt64(self.approval_delay_milliseconds())
1981
return dbus.UInt64(self.approval_delay.total_seconds()
1452
1983
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1454
1985
# ApprovalDuration - property
1455
@dbus_service_property(_interface, signature="t",
1986
@dbus_service_property(_interface,
1456
1988
access="readwrite")
1457
1989
def ApprovalDuration_dbus_property(self, value=None):
1458
1990
if value is None: # get
1459
return dbus.UInt64(timedelta_to_milliseconds(
1460
self.approval_duration))
1991
return dbus.UInt64(self.approval_duration.total_seconds()
1461
1993
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1463
1995
# Name - property
1997
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1464
1998
@dbus_service_property(_interface, signature="s", access="read")
1465
1999
def Name_dbus_property(self):
1466
2000
return dbus.String(self.name)
1468
2002
# Fingerprint - property
2004
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1469
2005
@dbus_service_property(_interface, signature="s", access="read")
1470
2006
def Fingerprint_dbus_property(self):
1471
2007
return dbus.String(self.fingerprint)
1473
2009
# Host - property
1474
@dbus_service_property(_interface, signature="s",
2010
@dbus_service_property(_interface,
1475
2012
access="readwrite")
1476
2013
def Host_dbus_property(self, value=None):
1477
2014
if value is None: # get
1478
2015
return dbus.String(self.host)
1479
self.host = unicode(value)
2016
self.host = str(value)
1481
2018
# Created - property
2020
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1482
2021
@dbus_service_property(_interface, signature="s", access="read")
1483
2022
def Created_dbus_property(self):
1484
2023
return datetime_to_dbus(self.created)
1486
2025
# LastEnabled - property
1487
2026
@dbus_service_property(_interface, signature="s", access="read")
1488
2027
def LastEnabled_dbus_property(self):
1489
2028
return datetime_to_dbus(self.last_enabled)
1491
2030
# Enabled - property
1492
@dbus_service_property(_interface, signature="b",
2031
@dbus_service_property(_interface,
1493
2033
access="readwrite")
1494
2034
def Enabled_dbus_property(self, value=None):
1495
2035
if value is None: # get
1543
2084
if (getattr(self, "disable_initiator_tag", None)
1546
gobject.source_remove(self.disable_initiator_tag)
1547
self.disable_initiator_tag = (
1548
gobject.timeout_add(
1549
timedelta_to_milliseconds(self.expires - now),
2087
GLib.source_remove(self.disable_initiator_tag)
2088
self.disable_initiator_tag = GLib.timeout_add(
2089
int((self.expires - now).total_seconds() * 1000),
1552
2092
# ExtendedTimeout - property
1553
@dbus_service_property(_interface, signature="t",
2093
@dbus_service_property(_interface,
1554
2095
access="readwrite")
1555
2096
def ExtendedTimeout_dbus_property(self, value=None):
1556
2097
if value is None: # get
1557
return dbus.UInt64(self.extended_timeout_milliseconds())
2098
return dbus.UInt64(self.extended_timeout.total_seconds()
1558
2100
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1560
2102
# Interval - property
1561
@dbus_service_property(_interface, signature="t",
2103
@dbus_service_property(_interface,
1562
2105
access="readwrite")
1563
2106
def Interval_dbus_property(self, value=None):
1564
2107
if value is None: # get
1565
return dbus.UInt64(self.interval_milliseconds())
2108
return dbus.UInt64(self.interval.total_seconds() * 1000)
1566
2109
self.interval = datetime.timedelta(0, 0, 0, value)
1567
2110
if getattr(self, "checker_initiator_tag", None) is None:
1569
2112
if self.enabled:
1570
2113
# Reschedule checker run
1571
gobject.source_remove(self.checker_initiator_tag)
1572
self.checker_initiator_tag = (gobject.timeout_add
1573
(value, self.start_checker))
1574
self.start_checker() # Start one now, too
2114
GLib.source_remove(self.checker_initiator_tag)
2115
self.checker_initiator_tag = GLib.timeout_add(
2116
value, self.start_checker)
2117
self.start_checker() # Start one now, too
1576
2119
# Checker - property
1577
@dbus_service_property(_interface, signature="s",
2120
@dbus_service_property(_interface,
1578
2122
access="readwrite")
1579
2123
def Checker_dbus_property(self, value=None):
1580
2124
if value is None: # get
1581
2125
return dbus.String(self.checker_command)
1582
self.checker_command = unicode(value)
2126
self.checker_command = str(value)
1584
2128
# CheckerRunning - property
1585
@dbus_service_property(_interface, signature="b",
2129
@dbus_service_property(_interface,
1586
2131
access="readwrite")
1587
2132
def CheckerRunning_dbus_property(self, value=None):
1588
2133
if value is None: # get
1635
2190
class ClientHandler(socketserver.BaseRequestHandler, object):
1636
2191
"""A class to handle client connections.
1638
2193
Instantiated once for each connection to handle it.
1639
2194
Note: This will run in its own forked process."""
1641
2196
def handle(self):
1642
2197
with contextlib.closing(self.server.child_pipe) as child_pipe:
1643
2198
logger.info("TCP connection from: %s",
1644
unicode(self.client_address))
2199
str(self.client_address))
1645
2200
logger.debug("Pipe FD: %d",
1646
2201
self.server.child_pipe.fileno())
1648
session = (gnutls.connection
1649
.ClientSession(self.request,
1651
.X509Credentials()))
1653
# Note: gnutls.connection.X509Credentials is really a
1654
# generic GnuTLS certificate credentials object so long as
1655
# no X.509 keys are added to it. Therefore, we can use it
1656
# here despite using OpenPGP certificates.
1658
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1659
# "+AES-256-CBC", "+SHA1",
1660
# "+COMP-NULL", "+CTYPE-OPENPGP",
2203
session = gnutls.ClientSession(self.request)
2205
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2206
# "+AES-256-CBC", "+SHA1",
2207
# "+COMP-NULL", "+CTYPE-OPENPGP",
1662
2209
# Use a fallback default, since this MUST be set.
1663
2210
priority = self.server.gnutls_priority
1664
2211
if priority is None:
1665
2212
priority = "NORMAL"
1666
(gnutls.library.functions
1667
.gnutls_priority_set_direct(session._c_object,
2213
gnutls.priority_set_direct(session._c_object,
2214
priority.encode("utf-8"),
1670
2217
# Start communication using the Mandos protocol
1671
2218
# Get protocol number
1672
2219
line = self.request.makefile().readline()
1673
2220
logger.debug("Protocol version: %r", line)
1675
2222
if int(line.strip().split()[0]) > 1:
2223
raise RuntimeError(line)
1677
2224
except (ValueError, IndexError, RuntimeError) as error:
1678
2225
logger.error("Unknown protocol version: %s", error)
1681
2228
# Start GnuTLS connection
1683
2230
session.handshake()
1684
except gnutls.errors.GNUTLSError as error:
2231
except gnutls.Error as error:
1685
2232
logger.warning("Handshake failed: %s", error)
1686
2233
# Do not run session.bye() here: the session is not
1687
2234
# established. Just abandon the request.
1689
2236
logger.debug("Handshake succeeded")
1691
2238
approval_required = False
1694
fpr = self.fingerprint(self.peer_certificate
1697
gnutls.errors.GNUTLSError) as error:
2241
fpr = self.fingerprint(
2242
self.peer_certificate(session))
2243
except (TypeError, gnutls.Error) as error:
1698
2244
logger.warning("Bad certificate: %s", error)
1700
2246
logger.debug("Fingerprint: %s", fpr)
1703
2249
client = ProxyClient(child_pipe, fpr,
1704
2250
self.client_address)
1705
2251
except KeyError:
1708
2254
if client.approval_delay:
1709
2255
delay = client.approval_delay
1710
2256
client.approvals_pending += 1
1711
2257
approval_required = True
1714
2260
if not client.enabled:
1715
2261
logger.info("Client %s is disabled",
1717
2263
if self.server.use_dbus:
1718
2264
# Emit D-Bus signal
1719
2265
client.Rejected("Disabled")
1722
2268
if client.approved or not client.approval_delay:
1723
#We are approved or approval is disabled
2269
# We are approved or approval is disabled
1725
2271
elif client.approved is None:
1726
2272
logger.info("Client %s needs approval",
1761
2305
delay -= time2 - time
1764
while sent_size < len(client.secret):
1766
sent = session.send(client.secret[sent_size:])
1767
except gnutls.errors.GNUTLSError as error:
1768
logger.warning("gnutls send failed",
1771
logger.debug("Sent: %d, remaining: %d",
1772
sent, len(client.secret)
1773
- (sent_size + sent))
2308
session.send(client.secret)
2309
except gnutls.Error as error:
2310
logger.warning("gnutls send failed",
1776
2314
logger.info("Sending secret to %s", client.name)
1777
2315
# bump the timeout using extended_timeout
1778
2316
client.bump_timeout(client.extended_timeout)
1779
2317
if self.server.use_dbus:
1780
2318
# Emit D-Bus signal
1781
2319
client.GotSecret()
1784
2322
if approval_required:
1785
2323
client.approvals_pending -= 1
1788
except gnutls.errors.GNUTLSError as error:
2326
except gnutls.Error as error:
1789
2327
logger.warning("GnuTLS bye failed",
1790
2328
exc_info=error)
1793
2331
def peer_certificate(session):
1794
2332
"Return the peer's OpenPGP certificate as a bytestring"
1795
2333
# If not an OpenPGP certificate...
1796
if (gnutls.library.functions
1797
.gnutls_certificate_type_get(session._c_object)
1798
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1799
# ...do the normal thing
1800
return session.peer_certificate
2334
if (gnutls.certificate_type_get(session._c_object)
2335
!= gnutls.CRT_OPENPGP):
2336
# ...return invalid data
1801
2338
list_size = ctypes.c_uint(1)
1802
cert_list = (gnutls.library.functions
1803
.gnutls_certificate_get_peers
2339
cert_list = (gnutls.certificate_get_peers
1804
2340
(session._c_object, ctypes.byref(list_size)))
1805
2341
if not bool(cert_list) and list_size.value != 0:
1806
raise gnutls.errors.GNUTLSError("error getting peer"
2342
raise gnutls.Error("error getting peer certificate")
1808
2343
if list_size.value == 0:
1810
2345
cert = cert_list[0]
1811
2346
return ctypes.string_at(cert.data, cert.size)
1814
2349
def fingerprint(openpgp):
1815
2350
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1816
2351
# New GnuTLS "datum" with the OpenPGP public key
1817
datum = (gnutls.library.types
1818
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1821
ctypes.c_uint(len(openpgp))))
2352
datum = gnutls.datum_t(
2353
ctypes.cast(ctypes.c_char_p(openpgp),
2354
ctypes.POINTER(ctypes.c_ubyte)),
2355
ctypes.c_uint(len(openpgp)))
1822
2356
# New empty GnuTLS certificate
1823
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1824
(gnutls.library.functions
1825
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2357
crt = gnutls.openpgp_crt_t()
2358
gnutls.openpgp_crt_init(ctypes.byref(crt))
1826
2359
# Import the OpenPGP public key into the certificate
1827
(gnutls.library.functions
1828
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1829
gnutls.library.constants
1830
.GNUTLS_OPENPGP_FMT_RAW))
2360
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2361
gnutls.OPENPGP_FMT_RAW)
1831
2362
# Verify the self signature in the key
1832
2363
crtverify = ctypes.c_uint()
1833
(gnutls.library.functions
1834
.gnutls_openpgp_crt_verify_self(crt, 0,
1835
ctypes.byref(crtverify)))
2364
gnutls.openpgp_crt_verify_self(crt, 0,
2365
ctypes.byref(crtverify))
1836
2366
if crtverify.value != 0:
1837
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1838
raise (gnutls.errors.CertificateSecurityError
2367
gnutls.openpgp_crt_deinit(crt)
2368
raise gnutls.CertificateSecurityError(code
1840
2370
# New buffer for the fingerprint
1841
2371
buf = ctypes.create_string_buffer(20)
1842
2372
buf_len = ctypes.c_size_t()
1843
2373
# Get the fingerprint from the certificate into the buffer
1844
(gnutls.library.functions
1845
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1846
ctypes.byref(buf_len)))
2374
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2375
ctypes.byref(buf_len))
1847
2376
# Deinit the certificate
1848
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2377
gnutls.openpgp_crt_deinit(crt)
1849
2378
# Convert the buffer to a Python bytestring
1850
2379
fpr = ctypes.string_at(buf, buf_len.value)
1851
2380
# Convert the bytestring to hexadecimal notation
1856
2385
class MultiprocessingMixIn(object):
1857
2386
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1858
2388
def sub_process_main(self, request, address):
1860
2390
self.finish_request(request, address)
1861
2391
except Exception:
1862
2392
self.handle_error(request, address)
1863
2393
self.close_request(request)
1865
2395
def process_request(self, request, address):
1866
2396
"""Start a new process to process the request."""
1867
proc = multiprocessing.Process(target = self.sub_process_main,
1868
args = (request, address))
2397
proc = multiprocessing.Process(target=self.sub_process_main,
2398
args=(request, address))
1873
2403
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1874
2404
""" adds a pipe to the MixIn """
1875
2406
def process_request(self, request, client_address):
1876
2407
"""Overrides and wraps the original process_request().
1878
2409
This function creates a new pipe in self.pipe
1880
2411
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1882
2413
proc = MultiprocessingMixIn.process_request(self, request,
1883
2414
client_address)
1884
2415
self.child_pipe.close()
1885
2416
self.add_pipe(parent_pipe, proc)
1887
2418
def add_pipe(self, parent_pipe, proc):
1888
2419
"""Dummy function; override as necessary"""
1889
raise NotImplementedError
2420
raise NotImplementedError()
1892
2423
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1893
2424
socketserver.TCPServer, object):
1894
2425
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1897
2428
enabled: Boolean; whether this server is activated yet
1898
2429
interface: None or a network interface name (string)
1899
2430
use_ipv6: Boolean; to use IPv6 or not
1901
2433
def __init__(self, server_address, RequestHandlerClass,
1902
interface=None, use_ipv6=True, socketfd=None):
1903
2437
"""If socketfd is set, use that file descriptor instead of
1904
2438
creating a new one with socket.socket().
1934
2469
# socket_wrapper(), if socketfd was set.
1935
2470
socketserver.TCPServer.__init__(self, server_address,
1936
2471
RequestHandlerClass)
1938
2473
def server_bind(self):
1939
2474
"""This overrides the normal server_bind() function
1940
2475
to bind to an interface if one was specified, and also NOT to
1941
2476
bind to an address or port if they were not specified."""
2477
global SO_BINDTODEVICE
1942
2478
if self.interface is not None:
1943
2479
if SO_BINDTODEVICE is None:
1944
logger.error("SO_BINDTODEVICE does not exist;"
1945
" cannot bind to interface %s",
1949
self.socket.setsockopt(socket.SOL_SOCKET,
1953
except socket.error as error:
1954
if error.errno == errno.EPERM:
1955
logger.error("No permission to"
1956
" bind to interface %s",
1958
elif error.errno == errno.ENOPROTOOPT:
1959
logger.error("SO_BINDTODEVICE not available;"
1960
" cannot bind to interface %s",
1962
elif error.errno == errno.ENODEV:
1963
logger.error("Interface %s does not"
1964
" exist, cannot bind",
2480
# Fall back to a hard-coded value which seems to be
2482
logger.warning("SO_BINDTODEVICE not found, trying 25")
2483
SO_BINDTODEVICE = 25
2485
self.socket.setsockopt(
2486
socket.SOL_SOCKET, SO_BINDTODEVICE,
2487
(self.interface + "\0").encode("utf-8"))
2488
except socket.error as error:
2489
if error.errno == errno.EPERM:
2490
logger.error("No permission to bind to"
2491
" interface %s", self.interface)
2492
elif error.errno == errno.ENOPROTOOPT:
2493
logger.error("SO_BINDTODEVICE not available;"
2494
" cannot bind to interface %s",
2496
elif error.errno == errno.ENODEV:
2497
logger.error("Interface %s does not exist,"
2498
" cannot bind", self.interface)
1968
2501
# Only bind(2) the socket if we really need to.
1969
2502
if self.server_address[0] or self.server_address[1]:
1970
2503
if not self.server_address[0]:
1971
2504
if self.address_family == socket.AF_INET6:
1972
any_address = "::" # in6addr_any
2505
any_address = "::" # in6addr_any
1974
any_address = socket.INADDR_ANY
2507
any_address = "0.0.0.0" # INADDR_ANY
1975
2508
self.server_address = (any_address,
1976
2509
self.server_address[1])
1977
2510
elif not self.server_address[1]:
1978
self.server_address = (self.server_address[0],
2511
self.server_address = (self.server_address[0], 0)
1980
2512
# if self.interface:
1981
2513
# self.server_address = (self.server_address[0],
2072
2611
funcname = request[1]
2073
2612
args = request[2]
2074
2613
kwargs = request[3]
2076
2615
parent_pipe.send(('data', getattr(client_object,
2077
2616
funcname)(*args,
2080
2619
if command == 'getattr':
2081
2620
attrname = request[1]
2082
if callable(client_object.__getattribute__(attrname)):
2083
parent_pipe.send(('function',))
2621
if isinstance(client_object.__getattribute__(attrname),
2622
collections.Callable):
2623
parent_pipe.send(('function', ))
2085
parent_pipe.send(('data', client_object
2086
.__getattribute__(attrname)))
2626
'data', client_object.__getattribute__(attrname)))
2088
2628
if command == 'setattr':
2089
2629
attrname = request[1]
2090
2630
value = request[2]
2091
2631
setattr(client_object, attrname, value)
2636
def rfc3339_duration_to_delta(duration):
2637
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2639
>>> rfc3339_duration_to_delta("P7D")
2640
datetime.timedelta(7)
2641
>>> rfc3339_duration_to_delta("PT60S")
2642
datetime.timedelta(0, 60)
2643
>>> rfc3339_duration_to_delta("PT60M")
2644
datetime.timedelta(0, 3600)
2645
>>> rfc3339_duration_to_delta("PT24H")
2646
datetime.timedelta(1)
2647
>>> rfc3339_duration_to_delta("P1W")
2648
datetime.timedelta(7)
2649
>>> rfc3339_duration_to_delta("PT5M30S")
2650
datetime.timedelta(0, 330)
2651
>>> rfc3339_duration_to_delta("P1DT3M20S")
2652
datetime.timedelta(1, 200)
2655
# Parsing an RFC 3339 duration with regular expressions is not
2656
# possible - there would have to be multiple places for the same
2657
# values, like seconds. The current code, while more esoteric, is
2658
# cleaner without depending on a parsing library. If Python had a
2659
# built-in library for parsing we would use it, but we'd like to
2660
# avoid excessive use of external libraries.
2662
# New type for defining tokens, syntax, and semantics all-in-one
2663
Token = collections.namedtuple("Token", (
2664
"regexp", # To match token; if "value" is not None, must have
2665
# a "group" containing digits
2666
"value", # datetime.timedelta or None
2667
"followers")) # Tokens valid after this token
2668
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2669
# the "duration" ABNF definition in RFC 3339, Appendix A.
2670
token_end = Token(re.compile(r"$"), None, frozenset())
2671
token_second = Token(re.compile(r"(\d+)S"),
2672
datetime.timedelta(seconds=1),
2673
frozenset((token_end, )))
2674
token_minute = Token(re.compile(r"(\d+)M"),
2675
datetime.timedelta(minutes=1),
2676
frozenset((token_second, token_end)))
2677
token_hour = Token(re.compile(r"(\d+)H"),
2678
datetime.timedelta(hours=1),
2679
frozenset((token_minute, token_end)))
2680
token_time = Token(re.compile(r"T"),
2682
frozenset((token_hour, token_minute,
2684
token_day = Token(re.compile(r"(\d+)D"),
2685
datetime.timedelta(days=1),
2686
frozenset((token_time, token_end)))
2687
token_month = Token(re.compile(r"(\d+)M"),
2688
datetime.timedelta(weeks=4),
2689
frozenset((token_day, token_end)))
2690
token_year = Token(re.compile(r"(\d+)Y"),
2691
datetime.timedelta(weeks=52),
2692
frozenset((token_month, token_end)))
2693
token_week = Token(re.compile(r"(\d+)W"),
2694
datetime.timedelta(weeks=1),
2695
frozenset((token_end, )))
2696
token_duration = Token(re.compile(r"P"), None,
2697
frozenset((token_year, token_month,
2698
token_day, token_time,
2700
# Define starting values:
2702
value = datetime.timedelta()
2704
# Following valid tokens
2705
followers = frozenset((token_duration, ))
2706
# String left to parse
2708
# Loop until end token is found
2709
while found_token is not token_end:
2710
# Search for any currently valid tokens
2711
for token in followers:
2712
match = token.regexp.match(s)
2713
if match is not None:
2715
if token.value is not None:
2716
# Value found, parse digits
2717
factor = int(match.group(1), 10)
2718
# Add to value so far
2719
value += factor * token.value
2720
# Strip token from string
2721
s = token.regexp.sub("", s, 1)
2724
# Set valid next tokens
2725
followers = found_token.followers
2728
# No currently valid tokens were found
2729
raise ValueError("Invalid RFC 3339 duration: {!r}"
2096
2735
def string_to_delta(interval):
2097
2736
"""Parse a string and return a datetime.timedelta
2099
2738
>>> string_to_delta('7d')
2100
2739
datetime.timedelta(7)
2101
2740
>>> string_to_delta('60s')
2191
2835
parser.add_argument("--no-dbus", action="store_false",
2192
2836
dest="use_dbus", help="Do not provide D-Bus"
2193
" system bus interface")
2837
" system bus interface", default=None)
2194
2838
parser.add_argument("--no-ipv6", action="store_false",
2195
dest="use_ipv6", help="Do not use IPv6")
2839
dest="use_ipv6", help="Do not use IPv6",
2196
2841
parser.add_argument("--no-restore", action="store_false",
2197
2842
dest="restore", help="Do not restore stored"
2843
" state", default=None)
2199
2844
parser.add_argument("--socket", type=int,
2200
2845
help="Specify a file descriptor to a network"
2201
2846
" socket to use instead of creating one")
2202
2847
parser.add_argument("--statedir", metavar="DIR",
2203
2848
help="Directory to save/restore state in")
2849
parser.add_argument("--foreground", action="store_true",
2850
help="Run in foreground", default=None)
2851
parser.add_argument("--no-zeroconf", action="store_false",
2852
dest="zeroconf", help="Do not use Zeroconf",
2205
2855
options = parser.parse_args()
2207
2857
if options.check:
2859
fail_count, test_count = doctest.testmod()
2860
sys.exit(os.EX_OK if fail_count == 0 else 1)
2212
2862
# Default values for config file for server-global settings
2213
server_defaults = { "interface": "",
2218
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2219
"servicename": "Mandos",
2225
"statedir": "/var/lib/mandos"
2863
server_defaults = {"interface": "",
2868
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2869
":+SIGN-DSA-SHA256",
2870
"servicename": "Mandos",
2876
"statedir": "/var/lib/mandos",
2877
"foreground": "False",
2228
2881
# Parse config file for server-global settings
2229
2882
server_config = configparser.SafeConfigParser(server_defaults)
2230
2883
del server_defaults
2231
server_config.read(os.path.join(options.configdir,
2884
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2233
2885
# Convert the SafeConfigParser object to a dict
2234
2886
server_settings = server_config.defaults()
2235
2887
# Use the appropriate methods on the non-string config options
2236
for option in ("debug", "use_dbus", "use_ipv6"):
2888
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2889
"foreground", "zeroconf"):
2237
2890
server_settings[option] = server_config.getboolean("DEFAULT",
2239
2892
if server_settings["port"]:
2242
2895
if server_settings["socket"]:
2243
2896
server_settings["socket"] = server_config.getint("DEFAULT",
2245
# Later, stdin will, and stdout, and stderr might, be dup'ed
2898
# Later, stdin will, and stdout and stderr might, be dup'ed
2246
2899
# over with an opened os.devnull. But we don't want this to
2247
2900
# happen with a supplied network socket.
2248
2901
if 0 <= server_settings["socket"] <= 2:
2249
2902
server_settings["socket"] = os.dup(server_settings
2251
2904
del server_config
2253
2906
# Override the settings from the config file with command line
2254
2907
# options, if set.
2255
2908
for option in ("interface", "address", "port", "debug",
2256
"priority", "servicename", "configdir",
2257
"use_dbus", "use_ipv6", "debuglevel", "restore",
2258
"statedir", "socket"):
2909
"priority", "servicename", "configdir", "use_dbus",
2910
"use_ipv6", "debuglevel", "restore", "statedir",
2911
"socket", "foreground", "zeroconf"):
2259
2912
value = getattr(options, option)
2260
2913
if value is not None:
2261
2914
server_settings[option] = value
2263
2916
# Force all strings to be unicode
2264
2917
for option in server_settings.keys():
2265
if type(server_settings[option]) is str:
2266
server_settings[option] = unicode(server_settings[option])
2918
if isinstance(server_settings[option], bytes):
2919
server_settings[option] = (server_settings[option]
2921
# Force all boolean options to be boolean
2922
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2923
"foreground", "zeroconf"):
2924
server_settings[option] = bool(server_settings[option])
2925
# Debug implies foreground
2926
if server_settings["debug"]:
2927
server_settings["foreground"] = True
2267
2928
# Now we have our good server settings in "server_settings"
2269
2930
##################################################################
2932
if (not server_settings["zeroconf"]
2933
and not (server_settings["port"]
2934
or server_settings["socket"] != "")):
2935
parser.error("Needs port or socket to work without Zeroconf")
2271
2937
# For convenience
2272
2938
debug = server_settings["debug"]
2273
2939
debuglevel = server_settings["debuglevel"]
2285
2953
level = getattr(logging, debuglevel.upper())
2286
2954
initlogger(debug, level)
2288
2956
if server_settings["servicename"] != "Mandos":
2289
syslogger.setFormatter(logging.Formatter
2290
('Mandos ({0}) [%(process)d]:'
2291
' %(levelname)s: %(message)s'
2292
.format(server_settings
2957
syslogger.setFormatter(
2958
logging.Formatter('Mandos ({}) [%(process)d]:'
2959
' %(levelname)s: %(message)s'.format(
2960
server_settings["servicename"])))
2295
2962
# Parse config file with clients
2296
2963
client_config = configparser.SafeConfigParser(Client
2297
2964
.client_defaults)
2298
2965
client_config.read(os.path.join(server_settings["configdir"],
2299
2966
"clients.conf"))
2301
2968
global mandos_dbus_service
2302
2969
mandos_dbus_service = None
2304
tcp_server = MandosServer((server_settings["address"],
2305
server_settings["port"]),
2307
interface=(server_settings["interface"]
2311
server_settings["priority"],
2313
socketfd=(server_settings["socket"]
2316
pidfilename = "/var/run/mandos.pid"
2972
if server_settings["socket"] != "":
2973
socketfd = server_settings["socket"]
2974
tcp_server = MandosServer(
2975
(server_settings["address"], server_settings["port"]),
2977
interface=(server_settings["interface"] or None),
2979
gnutls_priority=server_settings["priority"],
2983
pidfilename = "/run/mandos.pid"
2984
if not os.path.isdir("/run/."):
2985
pidfilename = "/var/run/mandos.pid"
2318
pidfile = open(pidfilename, "w")
2988
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2319
2989
except IOError as e:
2320
2990
logger.error("Could not open file %r", pidfilename,
2323
for name in ("_mandos", "mandos", "nobody"):
2993
for name, group in (("_mandos", "_mandos"),
2994
("mandos", "mandos"),
2995
("nobody", "nogroup")):
2325
2997
uid = pwd.getpwnam(name).pw_uid
2326
gid = pwd.getpwnam(name).pw_gid
2998
gid = pwd.getpwnam(group).pw_gid
2328
3000
except KeyError:
3009
logger.debug("Did setuid/setgid to {}:{}".format(uid,
2336
3011
except OSError as error:
3012
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3013
.format(uid, gid, os.strerror(error.errno)))
2337
3014
if error.errno != errno.EPERM:
2341
3018
# Enable all possible GnuTLS debugging
2343
3020
# "Use a log level over 10 to enable all debugging options."
2344
3021
# - GnuTLS manual
2345
gnutls.library.functions.gnutls_global_set_log_level(11)
2347
@gnutls.library.types.gnutls_log_func
3022
gnutls.global_set_log_level(11)
2348
3025
def debug_gnutls(level, string):
2349
3026
logger.debug("GnuTLS: %s", string[:-1])
2351
(gnutls.library.functions
2352
.gnutls_global_set_log_function(debug_gnutls))
3028
gnutls.global_set_log_function(debug_gnutls)
2354
3030
# Redirect stdin so all checkers get /dev/null
2355
3031
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2356
3032
os.dup2(null, sys.stdin.fileno())
2360
3036
# Need to fork before connecting to D-Bus
2362
3038
# Close all input and output, do double fork, etc.
2365
gobject.threads_init()
3041
# multiprocessing will use threads, so before we use GLib we need
3042
# to inform GLib that threads will be used.
2367
3045
global main_loop
2368
3046
# From the Avahi example code
2369
3047
DBusGMainLoop(set_as_default=True)
2370
main_loop = gobject.MainLoop()
3048
main_loop = GLib.MainLoop()
2371
3049
bus = dbus.SystemBus()
2372
3050
# End of Avahi example code
2375
3053
bus_name = dbus.service.BusName("se.recompile.Mandos",
2376
bus, do_not_queue=True)
2377
old_bus_name = (dbus.service.BusName
2378
("se.bsnet.fukt.Mandos", bus,
2380
except dbus.exceptions.NameExistsException as e:
3056
old_bus_name = dbus.service.BusName(
3057
"se.bsnet.fukt.Mandos", bus,
3059
except dbus.exceptions.DBusException as e:
2381
3060
logger.error("Disabling D-Bus:", exc_info=e)
2382
3061
use_dbus = False
2383
3062
server_settings["use_dbus"] = False
2384
3063
tcp_server.use_dbus = False
2385
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2386
service = AvahiServiceToSyslog(name =
2387
server_settings["servicename"],
2388
servicetype = "_mandos._tcp",
2389
protocol = protocol, bus = bus)
2390
if server_settings["interface"]:
2391
service.interface = (if_nametoindex
2392
(str(server_settings["interface"])))
3065
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3066
service = AvahiServiceToSyslog(
3067
name=server_settings["servicename"],
3068
servicetype="_mandos._tcp",
3071
if server_settings["interface"]:
3072
service.interface = if_nametoindex(
3073
server_settings["interface"].encode("utf-8"))
2394
3075
global multiprocessing_manager
2395
3076
multiprocessing_manager = multiprocessing.Manager()
2397
3078
client_class = Client
2399
client_class = functools.partial(ClientDBus, bus = bus)
3080
client_class = functools.partial(ClientDBus, bus=bus)
2401
3082
client_settings = Client.config_parser(client_config)
2402
3083
old_client_settings = {}
2403
3084
clients_data = {}
3086
# This is used to redirect stdout and stderr for checker processes
3088
wnull = open(os.devnull, "w") # A writable /dev/null
3089
# Only used if server is running in foreground but not in debug
3091
if debug or not foreground:
2405
3094
# Get client data and settings from last running state.
2406
3095
if server_settings["restore"]:
2408
3097
with open(stored_state_path, "rb") as stored_state:
2409
clients_data, old_client_settings = (pickle.load
3098
if sys.version_info.major == 2:
3099
clients_data, old_client_settings = pickle.load(
3102
bytes_clients_data, bytes_old_client_settings = (
3103
pickle.load(stored_state, encoding="bytes"))
3104
# Fix bytes to strings
3107
clients_data = {(key.decode("utf-8")
3108
if isinstance(key, bytes)
3111
bytes_clients_data.items()}
3112
del bytes_clients_data
3113
for key in clients_data:
3114
value = {(k.decode("utf-8")
3115
if isinstance(k, bytes) else k): v
3117
clients_data[key].items()}
3118
clients_data[key] = value
3120
value["client_structure"] = [
3122
if isinstance(s, bytes)
3124
value["client_structure"]]
3126
for k in ("name", "host"):
3127
if isinstance(value[k], bytes):
3128
value[k] = value[k].decode("utf-8")
3129
# old_client_settings
3131
old_client_settings = {
3132
(key.decode("utf-8")
3133
if isinstance(key, bytes)
3136
bytes_old_client_settings.items()}
3137
del bytes_old_client_settings
3139
for value in old_client_settings.values():
3140
if isinstance(value["host"], bytes):
3141
value["host"] = (value["host"]
2411
3143
os.remove(stored_state_path)
2412
3144
except IOError as e:
2413
3145
if e.errno == errno.ENOENT:
2414
logger.warning("Could not load persistent state: {0}"
2415
.format(os.strerror(e.errno)))
3146
logger.warning("Could not load persistent state:"
3147
" {}".format(os.strerror(e.errno)))
2417
3149
logger.critical("Could not load persistent state:",
2420
3152
except EOFError as e:
2421
3153
logger.warning("Could not load persistent state: "
2422
"EOFError:", exc_info=e)
2424
3157
with PGPEngine() as pgp:
2425
for client_name, client in clients_data.iteritems():
3158
for client_name, client in clients_data.items():
3159
# Skip removed clients
3160
if client_name not in client_settings:
2426
3163
# Decide which value to use after restoring saved state.
2427
3164
# We have three different values: Old config file,
2428
3165
# new config file, and saved state.
2486
3223
for client_name in (set(client_settings)
2487
3224
- set(old_client_settings)):
2488
3225
clients_data[client_name] = client_settings[client_name]
2490
3227
# Create all client objects
2491
for client_name, client in clients_data.iteritems():
3228
for client_name, client in clients_data.items():
2492
3229
tcp_server.clients[client_name] = client_class(
2493
name = client_name, settings = client)
3232
server_settings=server_settings)
2495
3234
if not tcp_server.clients:
2496
3235
logger.warning("No clients defined")
2502
pidfile.write(str(pid) + "\n".encode("utf-8"))
2505
logger.error("Could not write to file %r with PID %d",
2508
# "pidfile" was never created
3238
if pidfile is not None:
3242
print(pid, file=pidfile)
3244
logger.error("Could not write to file %r with PID %d",
2510
3247
del pidfilename
2512
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2513
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3249
for termsig in (signal.SIGHUP, signal.SIGTERM):
3250
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3251
lambda: main_loop.quit() and False)
2516
@alternate_dbus_interfaces({"se.recompile.Mandos":
2517
"se.bsnet.fukt.Mandos"})
2518
class MandosDBusService(DBusObjectWithProperties):
3255
@alternate_dbus_interfaces(
3256
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3257
class MandosDBusService(DBusObjectWithObjectManager):
2519
3258
"""A D-Bus proxy object"""
2520
3260
def __init__(self):
2521
3261
dbus.service.Object.__init__(self, bus, "/")
2522
3263
_interface = "se.recompile.Mandos"
2524
@dbus_interface_annotations(_interface)
2526
return { "org.freedesktop.DBus.Property"
2527
".EmitsChangedSignal":
2530
3265
@dbus.service.signal(_interface, signature="o")
2531
3266
def ClientAdded(self, objpath):
2535
3270
@dbus.service.signal(_interface, signature="ss")
2536
3271
def ClientNotFound(self, fingerprint, address):
3275
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2540
3277
@dbus.service.signal(_interface, signature="os")
2541
3278
def ClientRemoved(self, objpath, name):
3282
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2545
3284
@dbus.service.method(_interface, out_signature="ao")
2546
3285
def GetAllClients(self):
2548
return dbus.Array(c.dbus_object_path
2550
tcp_server.clients.itervalues())
3287
return dbus.Array(c.dbus_object_path for c in
3288
tcp_server.clients.values())
3290
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2552
3292
@dbus.service.method(_interface,
2553
3293
out_signature="a{oa{sv}}")
2554
3294
def GetAllClientsWithProperties(self):
2556
3296
return dbus.Dictionary(
2557
((c.dbus_object_path, c.GetAll(""))
2558
for c in tcp_server.clients.itervalues()),
3297
{c.dbus_object_path: c.GetAll(
3298
"se.recompile.Mandos.Client")
3299
for c in tcp_server.clients.values()},
2559
3300
signature="oa{sv}")
2561
3302
@dbus.service.method(_interface, in_signature="o")
2562
3303
def RemoveClient(self, object_path):
2564
for c in tcp_server.clients.itervalues():
3305
for c in tcp_server.clients.values():
2565
3306
if c.dbus_object_path == object_path:
2566
3307
del tcp_server.clients[c.name]
2567
3308
c.remove_from_connection()
2568
# Don't signal anything except ClientRemoved
3309
# Don't signal the disabling
2569
3310
c.disable(quiet=True)
2571
self.ClientRemoved(object_path, c.name)
3311
# Emit D-Bus signal for removal
3312
self.client_removed_signal(c)
2573
3314
raise KeyError(object_path)
3318
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3319
out_signature="a{oa{sa{sv}}}")
3320
def GetManagedObjects(self):
3322
return dbus.Dictionary(
3323
{client.dbus_object_path:
3325
{interface: client.GetAll(interface)
3327
client._get_all_interface_names()})
3328
for client in tcp_server.clients.values()})
3330
def client_added_signal(self, client):
3331
"""Send the new standard signal and the old signal"""
3333
# New standard signal
3334
self.InterfacesAdded(
3335
client.dbus_object_path,
3337
{interface: client.GetAll(interface)
3339
client._get_all_interface_names()}))
3341
self.ClientAdded(client.dbus_object_path)
3343
def client_removed_signal(self, client):
3344
"""Send the new standard signal and the old signal"""
3346
# New standard signal
3347
self.InterfacesRemoved(
3348
client.dbus_object_path,
3349
client._get_all_interface_names())
3351
self.ClientRemoved(client.dbus_object_path,
2577
3354
mandos_dbus_service = MandosDBusService()
3356
# Save modules to variables to exempt the modules from being
3357
# unloaded before the function registered with atexit() is run.
3358
mp = multiprocessing
2580
3362
"Cleanup function; run on exit"
2583
multiprocessing.active_children()
3366
mp.active_children()
2584
3368
if not (tcp_server.clients or client_settings):
2587
3371
# Store client before exiting. Secrets are encrypted with key
2588
3372
# based on what config file has. If config file is
2589
3373
# removed/edited, old secret will thus be unrecovable.
2591
3375
with PGPEngine() as pgp:
2592
for client in tcp_server.clients.itervalues():
3376
for client in tcp_server.clients.values():
2593
3377
key = client_settings[client.name]["secret"]
2594
3378
client.encrypted_secret = pgp.encrypt(client.secret,
2596
3380
client_dict = {}
2598
3382
# A list of attributes that can not be pickled
2600
exclude = set(("bus", "changedstate", "secret",
2602
for name, typ in (inspect.getmembers
2603
(dbus.service.Object)):
3384
exclude = {"bus", "changedstate", "secret",
3385
"checker", "server_settings"}
3386
for name, typ in inspect.getmembers(dbus.service
2604
3388
exclude.add(name)
2606
3390
client_dict["encrypted_secret"] = (client
2607
3391
.encrypted_secret)
2608
3392
for attr in client.client_structure:
2609
3393
if attr not in exclude:
2610
3394
client_dict[attr] = getattr(client, attr)
2612
3396
clients[client.name] = client_dict
2613
3397
del client_settings[client.name]["secret"]
2616
with (tempfile.NamedTemporaryFile
2617
(mode='wb', suffix=".pickle", prefix='clients-',
2618
dir=os.path.dirname(stored_state_path),
2619
delete=False)) as stored_state:
2620
pickle.dump((clients, client_settings), stored_state)
2621
tempname=stored_state.name
3400
with tempfile.NamedTemporaryFile(
3404
dir=os.path.dirname(stored_state_path),
3405
delete=False) as stored_state:
3406
pickle.dump((clients, client_settings), stored_state,
3408
tempname = stored_state.name
2622
3409
os.rename(tempname, stored_state_path)
2623
3410
except (IOError, OSError) as e: