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- Committer: Teddy Hogeborn
- Date: 2019-08-18 04:14:31 UTC
- Revision ID: teddy@recompile.se-20190818041431-jgt8pizlzjvxalj0
Debian package: Client: Install the systemd sysusers.d file
* debian/mandos-client.dirs (usr/lib/sysusers.d): New.
* debian/mandos-client.dirs (usr/lib/sysusers.d): New.
- files added:
- debian/mandos-client.templates
- debian/tests
- dracut-module
- files removed:
- initramfs-tools-hook-conf
- files modified:
- .bzrignore
added
removed
mandos
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1
#!/usr/bin/python
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# -*- mode: python; coding: utf-8 -*-
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#
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#
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# Mandos server - give out binary blobs to connecting clients.
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#
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#
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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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#
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#
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# Everything else is
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# Copyright © 2008-2016 Teddy Hogeborn
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# Copyright © 2008-2016 Björn Påhlsson
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# Copyright © 2008-2019 Teddy Hogeborn
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# Copyright © 2008-2019 Björn Påhlsson
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#
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# This file is part of Mandos.
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#
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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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#
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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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#
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#
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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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#
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# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
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#
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# Contact the authors at <mandos@recompile.se>.
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#
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#
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from __future__ import (division, absolute_import, print_function,
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unicode_literals)
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import dbus
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import dbus.service
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import gi
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from gi.repository import GLib
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from dbus.mainloop.glib import DBusGMainLoop
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import ctypes
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import xml.dom.minidom
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import inspect
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if sys.version_info.major == 2:
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__metaclass__ = type
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# Try to find the value of SO_BINDTODEVICE:
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try:
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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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try:
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# This is where SO_BINDTODEVICE was up to and including Python
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# 2.6, and also 3.2:
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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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try:
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cc = subprocess.Popen(["cc", "--language=c", "-E",
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"/dev/stdin"],
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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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# No value found
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SO_BINDTODEVICE = None
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if sys.version_info.major == 2:
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str = unicode
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version = "1.7.6"
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if sys.version_info < (3, 2):
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configparser.Configparser = configparser.SafeConfigParser
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version = "1.8.7"
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stored_state_file = "clients.pickle"
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logger = logging.getLogger()
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if_nametoindex = ctypes.cdll.LoadLibrary(
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ctypes.util.find_library("c")).if_nametoindex
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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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def initlogger(debug, level=logging.WARNING):
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"""init logger and add loglevel"""
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global syslogger
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syslogger = (logging.handlers.SysLogHandler(
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facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = "/dev/log"))
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facility=logging.handlers.SysLogHandler.LOG_DAEMON,
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address="/dev/log"))
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syslogger.setFormatter(logging.Formatter
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('Mandos [%(process)d]: %(levelname)s:'
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' %(message)s'))
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logger.addHandler(syslogger)
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if debug:
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console = logging.StreamHandler()
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console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
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pass
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class PGPEngine(object):
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class PGPEngine:
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"""A simple class for OpenPGP symmetric encryption & decryption"""
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def __init__(self):
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self.tempdir = tempfile.mkdtemp(prefix="mandos-")
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self.gpg = "gpg"
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self.gnupgargs = ['--batch',
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'--homedir', self.tempdir,
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'--force-mdc',
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'--quiet',
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'--no-use-agent']
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'--quiet']
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# Only GPG version 1 has the --no-use-agent option.
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if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
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self.gnupgargs.append("--no-use-agent")
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def __enter__(self):
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return self
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def __exit__(self, exc_type, exc_value, traceback):
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self._cleanup()
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return False
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def __del__(self):
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self._cleanup()
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def _cleanup(self):
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if self.tempdir is not None:
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# Delete contents of tempdir
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for root, dirs, files in os.walk(self.tempdir,
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topdown = False):
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topdown=False):
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for filename in files:
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os.remove(os.path.join(root, filename))
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for dirname in dirs:
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# Remove tempdir
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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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.replace(b"\n", b"\\n")
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.replace(b"\0", b"\\x00"))
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return encoded
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def encrypt(self, data, password):
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passphrase = self.password_encode(password)
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with tempfile.NamedTemporaryFile(
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'--passphrase-file',
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passfile.name]
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+ self.gnupgargs,
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stdin = subprocess.PIPE,
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stdout = subprocess.PIPE,
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stderr = subprocess.PIPE)
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ciphertext, err = proc.communicate(input = data)
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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ciphertext, err = proc.communicate(input=data)
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if proc.returncode != 0:
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raise PGPError(err)
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return ciphertext
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def decrypt(self, data, password):
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passphrase = self.password_encode(password)
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with tempfile.NamedTemporaryFile(
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dir = self.tempdir) as passfile:
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dir=self.tempdir) as passfile:
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passfile.write(passphrase)
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passfile.flush()
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proc = subprocess.Popen([self.gpg, '--decrypt',
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'--passphrase-file',
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passfile.name]
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+ self.gnupgargs,
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stdin = subprocess.PIPE,
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stdout = subprocess.PIPE,
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stderr = subprocess.PIPE)
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decrypted_plaintext, err = proc.communicate(input = data)
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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decrypted_plaintext, err = proc.communicate(input=data)
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if proc.returncode != 0:
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raise PGPError(err)
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return decrypted_plaintext
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# Pretend that we have an Avahi module
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class Avahi(object):
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"""This isn't so much a class as it is a module-like namespace.
259
It is instantiated once, and simulates having an Avahi module."""
260
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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class avahi:
286
"""This isn't so much a class as it is a module-like namespace."""
287
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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@staticmethod
297
def string_array_to_txt_array(t):
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return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
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for s in t), signature="ay")
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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
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SERVER_INVALID = 0 # avahi-common/defs.h
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SERVER_REGISTERING = 1 # avahi-common/defs.h
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SERVER_RUNNING = 2 # avahi-common/defs.h
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SERVER_COLLISION = 3 # avahi-common/defs.h
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SERVER_FAILURE = 4 # avahi-common/defs.h
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avahi = Avahi()
300
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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pass
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class AvahiService(object):
325
class AvahiService:
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"""An Avahi (Zeroconf) service.
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327
299
328
Attributes:
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329
interface: integer; avahi.IF_UNSPEC or an interface index.
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330
Used to optionally bind to the specified interface.
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server: D-Bus Server
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bus: dbus.SystemBus()
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344
"""
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346
def __init__(self,
318
interface = avahi.IF_UNSPEC,
319
name = None,
320
servicetype = None,
321
port = None,
322
TXT = None,
323
domain = "",
324
host = "",
325
max_renames = 32768,
326
protocol = avahi.PROTO_UNSPEC,
327
bus = None):
347
interface=avahi.IF_UNSPEC,
348
name=None,
349
servicetype=None,
350
port=None,
351
TXT=None,
352
domain="",
353
host="",
354
max_renames=32768,
355
protocol=avahi.PROTO_UNSPEC,
356
bus=None):
328
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self.interface = interface
329
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self.name = name
330
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self.type = servicetype
339
368
self.server = None
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self.bus = bus
341
370
self.entry_group_state_changed_match = None
342
371
343
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def rename(self, remove=True):
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"""Derived from the Avahi example code"""
345
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if self.rename_count >= self.max_renames:
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logger.critical("D-Bus Exception", exc_info=error)
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self.cleanup()
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os._exit(1)
368
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369
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def remove(self):
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"""Derived from the Avahi example code"""
371
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if self.entry_group_state_changed_match is not None:
373
402
self.entry_group_state_changed_match = None
374
403
if self.group is not None:
375
404
self.group.Reset()
376
405
377
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def add(self):
378
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"""Derived from the Avahi example code"""
379
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self.remove()
396
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dbus.UInt16(self.port),
397
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avahi.string_array_to_txt_array(self.TXT))
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self.group.Commit()
399
428
400
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def entry_group_state_changed(self, state, error):
401
430
"""Derived from the Avahi example code"""
402
431
logger.debug("Avahi entry group state change: %i", state)
403
432
404
433
if state == avahi.ENTRY_GROUP_ESTABLISHED:
405
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logger.debug("Zeroconf service established.")
406
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elif state == avahi.ENTRY_GROUP_COLLISION:
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logger.critical("Avahi: Error in group state changed %s",
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str(error))
412
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raise AvahiGroupError("State changed: {!s}".format(error))
413
442
414
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def cleanup(self):
415
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"""Derived from the Avahi example code"""
416
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if self.group is not None:
421
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pass
422
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self.group = None
423
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self.remove()
424
453
425
454
def server_state_changed(self, state, error=None):
426
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"""Derived from the Avahi example code"""
427
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logger.debug("Avahi server state change: %i", state)
456
485
logger.debug("Unknown state: %r", state)
457
486
else:
458
487
logger.debug("Unknown state: %r: %r", state, error)
459
488
460
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def activate(self):
461
490
"""Derived from the Avahi example code"""
462
491
if self.server is None:
473
502
class AvahiServiceToSyslog(AvahiService):
474
503
def rename(self, *args, **kwargs):
475
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"""Add the new name to the syslog messages"""
476
ret = AvahiService.rename(self, *args, **kwargs)
505
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
477
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syslogger.setFormatter(logging.Formatter(
478
507
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
479
508
.format(self.name)))
480
509
return ret
481
510
511
482
512
# Pretend that we have a GnuTLS module
483
class GnuTLS(object):
484
"""This isn't so much a class as it is a module-like namespace.
485
It is instantiated once, and simulates having a GnuTLS module."""
486
487
_library = ctypes.cdll.LoadLibrary(
488
ctypes.util.find_library("gnutls"))
489
_need_version = b"3.3.0"
490
def __init__(self):
491
# Need to use class name "GnuTLS" here, since this method is
492
# called before the assignment to the "gnutls" global variable
493
# happens.
494
if GnuTLS.check_version(self._need_version) is None:
495
raise GnuTLS.Error("Needs GnuTLS {} or later"
496
.format(self._need_version))
497
513
class gnutls:
514
"""This isn't so much a class as it is a module-like namespace."""
515
516
library = ctypes.util.find_library("gnutls")
517
if library is None:
518
library = ctypes.util.find_library("gnutls-deb0")
519
_library = ctypes.cdll.LoadLibrary(library)
520
del library
521
498
522
# Unless otherwise indicated, the constants and types below are
499
523
# all from the gnutls/gnutls.h C header file.
500
524
501
525
# Constants
502
526
E_SUCCESS = 0
503
527
E_INTERRUPTED = -52
504
528
E_AGAIN = -28
505
529
CRT_OPENPGP = 2
530
CRT_RAWPK = 3
506
531
CLIENT = 2
507
532
SHUT_RDWR = 0
508
533
CRD_CERTIFICATE = 1
509
534
E_NO_CERTIFICATE_FOUND = -49
535
X509_FMT_DER = 0
536
NO_TICKETS = 1<<10
537
ENABLE_RAWPK = 1<<18
538
CTYPE_PEERS = 3
539
KEYID_USE_SHA256 = 1 # gnutls/x509.h
510
540
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
511
541
512
542
# Types
513
543
class session_int(ctypes.Structure):
514
544
_fields_ = []
515
545
session_t = ctypes.POINTER(session_int)
546
516
547
class certificate_credentials_st(ctypes.Structure):
517
548
_fields_ = []
518
549
certificate_credentials_t = ctypes.POINTER(
519
550
certificate_credentials_st)
520
551
certificate_type_t = ctypes.c_int
552
521
553
class datum_t(ctypes.Structure):
522
554
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
523
555
('size', ctypes.c_uint)]
556
524
557
class openpgp_crt_int(ctypes.Structure):
525
558
_fields_ = []
526
559
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
527
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
560
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
528
561
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
529
562
credentials_type_t = ctypes.c_int
530
563
transport_ptr_t = ctypes.c_void_p
531
564
close_request_t = ctypes.c_int
532
565
533
566
# Exceptions
534
567
class Error(Exception):
535
# We need to use the class name "GnuTLS" here, since this
536
# exception might be raised from within GnuTLS.__init__,
537
# which is called before the assignment to the "gnutls"
538
# global variable has happened.
539
def __init__(self, message = None, code = None, args=()):
568
def __init__(self, message=None, code=None, args=()):
540
569
# Default usage is by a message string, but if a return
541
570
# code is passed, convert it to a string with
542
571
# gnutls.strerror()
543
572
self.code = code
544
573
if message is None and code is not None:
545
message = GnuTLS.strerror(code)
546
return super(GnuTLS.Error, self).__init__(
574
message = gnutls.strerror(code)
575
return super(gnutls.Error, self).__init__(
547
576
message, *args)
548
577
549
578
class CertificateSecurityError(Error):
550
579
pass
551
580
552
581
# Classes
553
class Credentials(object):
582
class Credentials:
554
583
def __init__(self):
555
584
self._c_object = gnutls.certificate_credentials_t()
556
585
gnutls.certificate_allocate_credentials(
557
586
ctypes.byref(self._c_object))
558
587
self.type = gnutls.CRD_CERTIFICATE
559
588
560
589
def __del__(self):
561
590
gnutls.certificate_free_credentials(self._c_object)
562
563
class ClientSession(object):
564
def __init__(self, socket, credentials = None):
591
592
class ClientSession:
593
def __init__(self, socket, credentials=None):
565
594
self._c_object = gnutls.session_t()
566
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
595
gnutls_flags = gnutls.CLIENT
596
if gnutls.check_version(b"3.5.6"):
597
gnutls_flags |= gnutls.NO_TICKETS
598
if gnutls.has_rawpk:
599
gnutls_flags |= gnutls.ENABLE_RAWPK
600
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
601
del gnutls_flags
567
602
gnutls.set_default_priority(self._c_object)
568
603
gnutls.transport_set_ptr(self._c_object, socket.fileno())
569
604
gnutls.handshake_set_private_extensions(self._c_object,
575
610
ctypes.cast(credentials._c_object,
576
611
ctypes.c_void_p))
577
612
self.credentials = credentials
578
613
579
614
def __del__(self):
580
615
gnutls.deinit(self._c_object)
581
616
582
617
def handshake(self):
583
618
return gnutls.handshake(self._c_object)
584
619
585
620
def send(self, data):
586
621
data = bytes(data)
587
622
data_len = len(data)
589
624
data_len -= gnutls.record_send(self._c_object,
590
625
data[-data_len:],
591
626
data_len)
592
627
593
628
def bye(self):
594
629
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
595
630
596
631
# Error handling functions
597
632
def _error_code(result):
598
633
"""A function to raise exceptions on errors, suitable
600
635
if result >= 0:
601
636
return result
602
637
if result == gnutls.E_NO_CERTIFICATE_FOUND:
603
raise gnutls.CertificateSecurityError(code = result)
604
raise gnutls.Error(code = result)
605
638
raise gnutls.CertificateSecurityError(code=result)
639
raise gnutls.Error(code=result)
640
606
641
def _retry_on_error(result, func, arguments):
607
642
"""A function to retry on some errors, suitable
608
643
for the 'errcheck' attribute on ctypes functions"""
611
646
return _error_code(result)
612
647
result = func(*arguments)
613
648
return result
614
649
615
650
# Unless otherwise indicated, the function declarations below are
616
651
# all from the gnutls/gnutls.h C header file.
617
652
618
653
# Functions
619
654
priority_set_direct = _library.gnutls_priority_set_direct
620
655
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
621
656
ctypes.POINTER(ctypes.c_char_p)]
622
657
priority_set_direct.restype = _error_code
623
658
624
659
init = _library.gnutls_init
625
660
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
626
661
init.restype = _error_code
627
662
628
663
set_default_priority = _library.gnutls_set_default_priority
629
664
set_default_priority.argtypes = [session_t]
630
665
set_default_priority.restype = _error_code
631
666
632
667
record_send = _library.gnutls_record_send
633
668
record_send.argtypes = [session_t, ctypes.c_void_p,
634
669
ctypes.c_size_t]
635
670
record_send.restype = ctypes.c_ssize_t
636
671
record_send.errcheck = _retry_on_error
637
672
638
673
certificate_allocate_credentials = (
639
674
_library.gnutls_certificate_allocate_credentials)
640
675
certificate_allocate_credentials.argtypes = [
641
676
ctypes.POINTER(certificate_credentials_t)]
642
677
certificate_allocate_credentials.restype = _error_code
643
678
644
679
certificate_free_credentials = (
645
680
_library.gnutls_certificate_free_credentials)
646
certificate_free_credentials.argtypes = [certificate_credentials_t]
681
certificate_free_credentials.argtypes = [
682
certificate_credentials_t]
647
683
certificate_free_credentials.restype = None
648
684
649
685
handshake_set_private_extensions = (
650
686
_library.gnutls_handshake_set_private_extensions)
651
687
handshake_set_private_extensions.argtypes = [session_t,
652
688
ctypes.c_int]
653
689
handshake_set_private_extensions.restype = None
654
690
655
691
credentials_set = _library.gnutls_credentials_set
656
692
credentials_set.argtypes = [session_t, credentials_type_t,
657
693
ctypes.c_void_p]
658
694
credentials_set.restype = _error_code
659
695
660
696
strerror = _library.gnutls_strerror
661
697
strerror.argtypes = [ctypes.c_int]
662
698
strerror.restype = ctypes.c_char_p
663
699
664
700
certificate_type_get = _library.gnutls_certificate_type_get
665
701
certificate_type_get.argtypes = [session_t]
666
702
certificate_type_get.restype = _error_code
667
703
668
704
certificate_get_peers = _library.gnutls_certificate_get_peers
669
705
certificate_get_peers.argtypes = [session_t,
670
706
ctypes.POINTER(ctypes.c_uint)]
671
707
certificate_get_peers.restype = ctypes.POINTER(datum_t)
672
708
673
709
global_set_log_level = _library.gnutls_global_set_log_level
674
710
global_set_log_level.argtypes = [ctypes.c_int]
675
711
global_set_log_level.restype = None
676
712
677
713
global_set_log_function = _library.gnutls_global_set_log_function
678
714
global_set_log_function.argtypes = [log_func]
679
715
global_set_log_function.restype = None
680
716
681
717
deinit = _library.gnutls_deinit
682
718
deinit.argtypes = [session_t]
683
719
deinit.restype = None
684
720
685
721
handshake = _library.gnutls_handshake
686
722
handshake.argtypes = [session_t]
687
723
handshake.restype = _error_code
688
724
handshake.errcheck = _retry_on_error
689
725
690
726
transport_set_ptr = _library.gnutls_transport_set_ptr
691
727
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
692
728
transport_set_ptr.restype = None
693
729
694
730
bye = _library.gnutls_bye
695
731
bye.argtypes = [session_t, close_request_t]
696
732
bye.restype = _error_code
697
733
bye.errcheck = _retry_on_error
698
734
699
735
check_version = _library.gnutls_check_version
700
736
check_version.argtypes = [ctypes.c_char_p]
701
737
check_version.restype = ctypes.c_char_p
702
703
# All the function declarations below are from gnutls/openpgp.h
704
705
openpgp_crt_init = _library.gnutls_openpgp_crt_init
706
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
707
openpgp_crt_init.restype = _error_code
708
709
openpgp_crt_import = _library.gnutls_openpgp_crt_import
710
openpgp_crt_import.argtypes = [openpgp_crt_t,
711
ctypes.POINTER(datum_t),
712
openpgp_crt_fmt_t]
713
openpgp_crt_import.restype = _error_code
714
715
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
716
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
717
ctypes.POINTER(ctypes.c_uint)]
718
openpgp_crt_verify_self.restype = _error_code
719
720
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
721
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
722
openpgp_crt_deinit.restype = None
723
724
openpgp_crt_get_fingerprint = (
725
_library.gnutls_openpgp_crt_get_fingerprint)
726
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
727
ctypes.c_void_p,
728
ctypes.POINTER(
729
ctypes.c_size_t)]
730
openpgp_crt_get_fingerprint.restype = _error_code
731
738
739
_need_version = b"3.3.0"
740
if check_version(_need_version) is None:
741
raise self.Error("Needs GnuTLS {} or later"
742
.format(_need_version))
743
744
_tls_rawpk_version = b"3.6.6"
745
has_rawpk = bool(check_version(_tls_rawpk_version))
746
747
if has_rawpk:
748
# Types
749
class pubkey_st(ctypes.Structure):
750
_fields = []
751
pubkey_t = ctypes.POINTER(pubkey_st)
752
753
x509_crt_fmt_t = ctypes.c_int
754
755
# All the function declarations below are from gnutls/abstract.h
756
pubkey_init = _library.gnutls_pubkey_init
757
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
758
pubkey_init.restype = _error_code
759
760
pubkey_import = _library.gnutls_pubkey_import
761
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
762
x509_crt_fmt_t]
763
pubkey_import.restype = _error_code
764
765
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
766
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
767
ctypes.POINTER(ctypes.c_ubyte),
768
ctypes.POINTER(ctypes.c_size_t)]
769
pubkey_get_key_id.restype = _error_code
770
771
pubkey_deinit = _library.gnutls_pubkey_deinit
772
pubkey_deinit.argtypes = [pubkey_t]
773
pubkey_deinit.restype = None
774
else:
775
# All the function declarations below are from gnutls/openpgp.h
776
777
openpgp_crt_init = _library.gnutls_openpgp_crt_init
778
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
779
openpgp_crt_init.restype = _error_code
780
781
openpgp_crt_import = _library.gnutls_openpgp_crt_import
782
openpgp_crt_import.argtypes = [openpgp_crt_t,
783
ctypes.POINTER(datum_t),
784
openpgp_crt_fmt_t]
785
openpgp_crt_import.restype = _error_code
786
787
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
788
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
789
ctypes.POINTER(ctypes.c_uint)]
790
openpgp_crt_verify_self.restype = _error_code
791
792
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
793
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
794
openpgp_crt_deinit.restype = None
795
796
openpgp_crt_get_fingerprint = (
797
_library.gnutls_openpgp_crt_get_fingerprint)
798
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
799
ctypes.c_void_p,
800
ctypes.POINTER(
801
ctypes.c_size_t)]
802
openpgp_crt_get_fingerprint.restype = _error_code
803
804
if check_version(b"3.6.4"):
805
certificate_type_get2 = _library.gnutls_certificate_type_get2
806
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
807
certificate_type_get2.restype = _error_code
808
732
809
# Remove non-public functions
733
810
del _error_code, _retry_on_error
734
# Create the global "gnutls" object, simulating a module
735
gnutls = GnuTLS()
811
736
812
737
813
def call_pipe(connection, # : multiprocessing.Connection
738
814
func, *args, **kwargs):
739
815
"""This function is meant to be called by multiprocessing.Process
740
816
741
817
This function runs func(*args, **kwargs), and writes the resulting
742
818
return value on the provided multiprocessing.Connection.
743
819
"""
744
820
connection.send(func(*args, **kwargs))
745
821
connection.close()
746
822
747
class Client(object):
823
824
class Client:
748
825
"""A representation of a client host served by this server.
749
826
750
827
Attributes:
751
828
approved: bool(); 'None' if not yet approved/disapproved
752
829
approval_delay: datetime.timedelta(); Time to wait for approval
753
830
approval_duration: datetime.timedelta(); Duration of one approval
754
checker: subprocess.Popen(); a running checker process used
755
to see if the client lives.
756
'None' if no process is running.
831
checker: multiprocessing.Process(); a running checker process used
832
to see if the client lives. 'None' if no process is
833
running.
757
834
checker_callback_tag: a GLib event source tag, or None
758
835
checker_command: string; External command which is run to check
759
836
if client lives. %() expansions are done at
767
844
disable_initiator_tag: a GLib event source tag, or None
768
845
enabled: bool()
769
846
fingerprint: string (40 or 32 hexadecimal digits); used to
770
uniquely identify the client
847
uniquely identify an OpenPGP client
848
key_id: string (64 hexadecimal digits); used to uniquely identify
849
a client using raw public keys
771
850
host: string; available for use by the checker command
772
851
interval: datetime.timedelta(); How often to start a new checker
773
852
last_approval_request: datetime.datetime(); (UTC) or None
789
868
disabled, or None
790
869
server_settings: The server_settings dict from main()
791
870
"""
792
871
793
872
runtime_expansions = ("approval_delay", "approval_duration",
794
"created", "enabled", "expires",
873
"created", "enabled", "expires", "key_id",
795
874
"fingerprint", "host", "interval",
796
875
"last_approval_request", "last_checked_ok",
797
876
"last_enabled", "name", "timeout")
806
885
"approved_by_default": "True",
807
886
"enabled": "True",
808
887
}
809
888
810
889
@staticmethod
811
890
def config_parser(config):
812
891
"""Construct a new dict of client settings of this form:
819
898
for client_name in config.sections():
820
899
section = dict(config.items(client_name))
821
900
client = settings[client_name] = {}
822
901
823
902
client["host"] = section["host"]
824
903
# Reformat values from string types to Python types
825
904
client["approved_by_default"] = config.getboolean(
826
905
client_name, "approved_by_default")
827
906
client["enabled"] = config.getboolean(client_name,
828
907
"enabled")
829
830
# Uppercase and remove spaces from fingerprint for later
831
# comparison purposes with return value from the
832
# fingerprint() function
908
909
# Uppercase and remove spaces from key_id and fingerprint
910
# for later comparison purposes with return value from the
911
# key_id() and fingerprint() functions
912
client["key_id"] = (section.get("key_id", "").upper()
913
.replace(" ", ""))
833
914
client["fingerprint"] = (section["fingerprint"].upper()
834
915
.replace(" ", ""))
835
916
if "secret" in section:
856
937
client["last_approval_request"] = None
857
938
client["last_checked_ok"] = None
858
939
client["last_checker_status"] = -2
859
940
860
941
return settings
861
862
def __init__(self, settings, name = None, server_settings=None):
942
943
def __init__(self, settings, name=None, server_settings=None):
863
944
self.name = name
864
945
if server_settings is None:
865
946
server_settings = {}
867
948
# adding all client settings
868
949
for setting, value in settings.items():
869
950
setattr(self, setting, value)
870
951
871
952
if self.enabled:
872
953
if not hasattr(self, "last_enabled"):
873
954
self.last_enabled = datetime.datetime.utcnow()
877
958
else:
878
959
self.last_enabled = None
879
960
self.expires = None
880
961
881
962
logger.debug("Creating client %r", self.name)
963
logger.debug(" Key ID: %s", self.key_id)
882
964
logger.debug(" Fingerprint: %s", self.fingerprint)
883
965
self.created = settings.get("created",
884
966
datetime.datetime.utcnow())
885
967
886
968
# attributes specific for this server instance
887
969
self.checker = None
888
970
self.checker_initiator_tag = None
897
979
for attr in self.__dict__.keys()
898
980
if not attr.startswith("_")]
899
981
self.client_structure.append("client_structure")
900
982
901
983
for name, t in inspect.getmembers(
902
984
type(self), lambda obj: isinstance(obj, property)):
903
985
if not name.startswith("_"):
904
986
self.client_structure.append(name)
905
987
906
988
# Send notice to process children that client state has changed
907
989
def send_changedstate(self):
908
990
with self.changedstate:
909
991
self.changedstate.notify_all()
910
992
911
993
def enable(self):
912
994
"""Start this client's checker and timeout hooks"""
913
995
if getattr(self, "enabled", False):
918
1000
self.last_enabled = datetime.datetime.utcnow()
919
1001
self.init_checker()
920
1002
self.send_changedstate()
921
1003
922
1004
def disable(self, quiet=True):
923
1005
"""Disable this client."""
924
1006
if not getattr(self, "enabled", False):
938
1020
self.send_changedstate()
939
1021
# Do not run this again if called by a GLib.timeout_add
940
1022
return False
941
1023
942
1024
def __del__(self):
943
1025
self.disable()
944
1026
945
1027
def init_checker(self):
946
1028
# Schedule a new checker to be started an 'interval' from now,
947
1029
# and every interval from then on.
957
1039
int(self.timeout.total_seconds() * 1000), self.disable)
958
1040
# Also start a new checker *right now*.
959
1041
self.start_checker()
960
1042
961
1043
def checker_callback(self, source, condition, connection,
962
1044
command):
963
1045
"""The checker has completed, so take appropriate actions."""
964
self.checker_callback_tag = None
965
self.checker = None
966
1046
# Read return code from connection (see call_pipe)
967
1047
returncode = connection.recv()
968
1048
connection.close()
969
1049
self.checker.join()
1050
self.checker_callback_tag = None
1051
self.checker = None
1052
970
1053
if returncode >= 0:
971
1054
self.last_checker_status = returncode
972
1055
self.last_checker_signal = None
982
1065
logger.warning("Checker for %(name)s crashed?",
983
1066
vars(self))
984
1067
return False
985
1068
986
1069
def checked_ok(self):
987
1070
"""Assert that the client has been seen, alive and well."""
988
1071
self.last_checked_ok = datetime.datetime.utcnow()
989
1072
self.last_checker_status = 0
990
1073
self.last_checker_signal = None
991
1074
self.bump_timeout()
992
1075
993
1076
def bump_timeout(self, timeout=None):
994
1077
"""Bump up the timeout for this client."""
995
1078
if timeout is None:
1001
1084
self.disable_initiator_tag = GLib.timeout_add(
1002
1085
int(timeout.total_seconds() * 1000), self.disable)
1003
1086
self.expires = datetime.datetime.utcnow() + timeout
1004
1087
1005
1088
def need_approval(self):
1006
1089
self.last_approval_request = datetime.datetime.utcnow()
1007
1090
1008
1091
def start_checker(self):
1009
1092
"""Start a new checker subprocess if one is not running.
1010
1093
1011
1094
If a checker already exists, leave it running and do
1012
1095
nothing."""
1013
1096
# The reason for not killing a running checker is that if we
1018
1101
# checkers alone, the checker would have to take more time
1019
1102
# than 'timeout' for the client to be disabled, which is as it
1020
1103
# should be.
1021
1104
1022
1105
if self.checker is not None and not self.checker.is_alive():
1023
1106
logger.warning("Checker was not alive; joining")
1024
1107
self.checker.join()
1028
1111
# Escape attributes for the shell
1029
1112
escaped_attrs = {
1030
1113
attr: re.escape(str(getattr(self, attr)))
1031
for attr in self.runtime_expansions }
1114
for attr in self.runtime_expansions}
1032
1115
try:
1033
1116
command = self.checker_command % escaped_attrs
1034
1117
except TypeError as error:
1046
1129
# The exception is when not debugging but nevertheless
1047
1130
# running in the foreground; use the previously
1048
1131
# created wnull.
1049
popen_args = { "close_fds": True,
1050
"shell": True,
1051
"cwd": "/" }
1132
popen_args = {"close_fds": True,
1133
"shell": True,
1134
"cwd": "/"}
1052
1135
if (not self.server_settings["debug"]
1053
1136
and self.server_settings["foreground"]):
1054
1137
popen_args.update({"stdout": wnull,
1055
"stderr": wnull })
1056
pipe = multiprocessing.Pipe(duplex = False)
1138
"stderr": wnull})
1139
pipe = multiprocessing.Pipe(duplex=False)
1057
1140
self.checker = multiprocessing.Process(
1058
target = call_pipe,
1059
args = (pipe[1], subprocess.call, command),
1060
kwargs = popen_args)
1141
target=call_pipe,
1142
args=(pipe[1], subprocess.call, command),
1143
kwargs=popen_args)
1061
1144
self.checker.start()
1062
1145
self.checker_callback_tag = GLib.io_add_watch(
1063
1146
pipe[0].fileno(), GLib.IO_IN,
1064
1147
self.checker_callback, pipe[0], command)
1065
1148
# Re-run this periodically if run by GLib.timeout_add
1066
1149
return True
1067
1150
1068
1151
def stop_checker(self):
1069
1152
"""Force the checker process, if any, to stop."""
1070
1153
if self.checker_callback_tag:
1083
1166
byte_arrays=False):
1084
1167
"""Decorators for marking methods of a DBusObjectWithProperties to
1085
1168
become properties on the D-Bus.
1086
1169
1087
1170
The decorated method will be called with no arguments by "Get"
1088
1171
and with one argument by "Set".
1089
1172
1090
1173
The parameters, where they are supported, are the same as
1091
1174
dbus.service.method, except there is only "signature", since the
1092
1175
type from Get() and the type sent to Set() is the same.
1096
1179
if byte_arrays and signature != "ay":
1097
1180
raise ValueError("Byte arrays not supported for non-'ay'"
1098
1181
" signature {!r}".format(signature))
1099
1182
1100
1183
def decorator(func):
1101
1184
func._dbus_is_property = True
1102
1185
func._dbus_interface = dbus_interface
1105
1188
func._dbus_name = func.__name__
1106
1189
if func._dbus_name.endswith("_dbus_property"):
1107
1190
func._dbus_name = func._dbus_name[:-14]
1108
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
1191
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1109
1192
return func
1110
1193
1111
1194
return decorator
1112
1195
1113
1196
1114
1197
def dbus_interface_annotations(dbus_interface):
1115
1198
"""Decorator for marking functions returning interface annotations
1116
1199
1117
1200
Usage:
1118
1201
1119
1202
@dbus_interface_annotations("org.example.Interface")
1120
1203
def _foo(self): # Function name does not matter
1121
1204
return {"org.freedesktop.DBus.Deprecated": "true",
1122
1205
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1123
1206
"false"}
1124
1207
"""
1125
1208
1126
1209
def decorator(func):
1127
1210
func._dbus_is_interface = True
1128
1211
func._dbus_interface = dbus_interface
1129
1212
func._dbus_name = dbus_interface
1130
1213
return func
1131
1214
1132
1215
return decorator
1133
1216
1134
1217
1135
1218
def dbus_annotations(annotations):
1136
1219
"""Decorator to annotate D-Bus methods, signals or properties
1137
1220
Usage:
1138
1221
1139
1222
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1140
1223
"org.freedesktop.DBus.Property."
1141
1224
"EmitsChangedSignal": "false"})
1143
1226
access="r")
1144
1227
def Property_dbus_property(self):
1145
1228
return dbus.Boolean(False)
1146
1229
1147
1230
See also the DBusObjectWithAnnotations class.
1148
1231
"""
1149
1232
1150
1233
def decorator(func):
1151
1234
func._dbus_annotations = annotations
1152
1235
return func
1153
1236
1154
1237
return decorator
1155
1238
1156
1239
1174
1257
1175
1258
class DBusObjectWithAnnotations(dbus.service.Object):
1176
1259
"""A D-Bus object with annotations.
1177
1260
1178
1261
Classes inheriting from this can use the dbus_annotations
1179
1262
decorator to add annotations to methods or signals.
1180
1263
"""
1181
1264
1182
1265
@staticmethod
1183
1266
def _is_dbus_thing(thing):
1184
1267
"""Returns a function testing if an attribute is a D-Bus thing
1185
1268
1186
1269
If called like _is_dbus_thing("method") it returns a function
1187
1270
suitable for use as predicate to inspect.getmembers().
1188
1271
"""
1189
1272
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1190
1273
False)
1191
1274
1192
1275
def _get_all_dbus_things(self, thing):
1193
1276
"""Returns a generator of (name, attribute) pairs
1194
1277
"""
1197
1280
for cls in self.__class__.__mro__
1198
1281
for name, athing in
1199
1282
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1200
1283
1201
1284
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1202
out_signature = "s",
1203
path_keyword = 'object_path',
1204
connection_keyword = 'connection')
1285
out_signature="s",
1286
path_keyword='object_path',
1287
connection_keyword='connection')
1205
1288
def Introspect(self, object_path, connection):
1206
1289
"""Overloading of standard D-Bus method.
1207
1290
1208
1291
Inserts annotation tags on methods and signals.
1209
1292
"""
1210
1293
xmlstring = dbus.service.Object.Introspect(self, object_path,
1211
1294
connection)
1212
1295
try:
1213
1296
document = xml.dom.minidom.parseString(xmlstring)
1214
1297
1215
1298
for if_tag in document.getElementsByTagName("interface"):
1216
1299
# Add annotation tags
1217
1300
for typ in ("method", "signal"):
1244
1327
if_tag.appendChild(ann_tag)
1245
1328
# Fix argument name for the Introspect method itself
1246
1329
if (if_tag.getAttribute("name")
1247
== dbus.INTROSPECTABLE_IFACE):
1330
== dbus.INTROSPECTABLE_IFACE):
1248
1331
for cn in if_tag.getElementsByTagName("method"):
1249
1332
if cn.getAttribute("name") == "Introspect":
1250
1333
for arg in cn.getElementsByTagName("arg"):
1263
1346
1264
1347
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1265
1348
"""A D-Bus object with properties.
1266
1349
1267
1350
Classes inheriting from this can use the dbus_service_property
1268
1351
decorator to expose methods as D-Bus properties. It exposes the
1269
1352
standard Get(), Set(), and GetAll() methods on the D-Bus.
1270
1353
"""
1271
1354
1272
1355
def _get_dbus_property(self, interface_name, property_name):
1273
1356
"""Returns a bound method if one exists which is a D-Bus
1274
1357
property with the specified name and interface.
1279
1362
if (value._dbus_name == property_name
1280
1363
and value._dbus_interface == interface_name):
1281
1364
return value.__get__(self)
1282
1365
1283
1366
# No such property
1284
1367
raise DBusPropertyNotFound("{}:{}.{}".format(
1285
1368
self.dbus_object_path, interface_name, property_name))
1286
1369
1287
1370
@classmethod
1288
1371
def _get_all_interface_names(cls):
1289
1372
"""Get a sequence of all interfaces supported by an object"""
1292
1375
for x in (inspect.getmro(cls))
1293
1376
for attr in dir(x))
1294
1377
if name is not None)
1295
1378
1296
1379
@dbus.service.method(dbus.PROPERTIES_IFACE,
1297
1380
in_signature="ss",
1298
1381
out_signature="v")
1306
1389
if not hasattr(value, "variant_level"):
1307
1390
return value
1308
1391
return type(value)(value, variant_level=value.variant_level+1)
1309
1392
1310
1393
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1311
1394
def Set(self, interface_name, property_name, value):
1312
1395
"""Standard D-Bus property Set() method, see D-Bus standard.
1324
1407
value = dbus.ByteArray(b''.join(chr(byte)
1325
1408
for byte in value))
1326
1409
prop(value)
1327
1410
1328
1411
@dbus.service.method(dbus.PROPERTIES_IFACE,
1329
1412
in_signature="s",
1330
1413
out_signature="a{sv}")
1331
1414
def GetAll(self, interface_name):
1332
1415
"""Standard D-Bus property GetAll() method, see D-Bus
1333
1416
standard.
1334
1417
1335
1418
Note: Will not include properties with access="write".
1336
1419
"""
1337
1420
properties = {}
1348
1431
properties[name] = value
1349
1432
continue
1350
1433
properties[name] = type(value)(
1351
value, variant_level = value.variant_level + 1)
1434
value, variant_level=value.variant_level + 1)
1352
1435
return dbus.Dictionary(properties, signature="sv")
1353
1436
1354
1437
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1355
1438
def PropertiesChanged(self, interface_name, changed_properties,
1356
1439
invalidated_properties):
1358
1441
standard.
1359
1442
"""
1360
1443
pass
1361
1444
1362
1445
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1363
1446
out_signature="s",
1364
1447
path_keyword='object_path',
1365
1448
connection_keyword='connection')
1366
1449
def Introspect(self, object_path, connection):
1367
1450
"""Overloading of standard D-Bus method.
1368
1451
1369
1452
Inserts property tags and interface annotation tags.
1370
1453
"""
1371
1454
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1373
1456
connection)
1374
1457
try:
1375
1458
document = xml.dom.minidom.parseString(xmlstring)
1376
1459
1377
1460
def make_tag(document, name, prop):
1378
1461
e = document.createElement("property")
1379
1462
e.setAttribute("name", name)
1380
1463
e.setAttribute("type", prop._dbus_signature)
1381
1464
e.setAttribute("access", prop._dbus_access)
1382
1465
return e
1383
1466
1384
1467
for if_tag in document.getElementsByTagName("interface"):
1385
1468
# Add property tags
1386
1469
for tag in (make_tag(document, name, prop)
1428
1511
exc_info=error)
1429
1512
return xmlstring
1430
1513
1514
1431
1515
try:
1432
1516
dbus.OBJECT_MANAGER_IFACE
1433
1517
except AttributeError:
1434
1518
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1435
1519
1520
1436
1521
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1437
1522
"""A D-Bus object with an ObjectManager.
1438
1523
1439
1524
Classes inheriting from this exposes the standard
1440
1525
GetManagedObjects call and the InterfacesAdded and
1441
1526
InterfacesRemoved signals on the standard
1442
1527
"org.freedesktop.DBus.ObjectManager" interface.
1443
1528
1444
1529
Note: No signals are sent automatically; they must be sent
1445
1530
manually.
1446
1531
"""
1447
1532
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1448
out_signature = "a{oa{sa{sv}}}")
1533
out_signature="a{oa{sa{sv}}}")
1449
1534
def GetManagedObjects(self):
1450
1535
"""This function must be overridden"""
1451
1536
raise NotImplementedError()
1452
1537
1453
1538
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1454
signature = "oa{sa{sv}}")
1539
signature="oa{sa{sv}}")
1455
1540
def InterfacesAdded(self, object_path, interfaces_and_properties):
1456
1541
pass
1457
1458
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1542
1543
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1459
1544
def InterfacesRemoved(self, object_path, interfaces):
1460
1545
pass
1461
1546
1462
1547
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1463
out_signature = "s",
1464
path_keyword = 'object_path',
1465
connection_keyword = 'connection')
1548
out_signature="s",
1549
path_keyword='object_path',
1550
connection_keyword='connection')
1466
1551
def Introspect(self, object_path, connection):
1467
1552
"""Overloading of standard D-Bus method.
1468
1553
1469
1554
Override return argument name of GetManagedObjects to be
1470
1555
"objpath_interfaces_and_properties"
1471
1556
"""
1474
1559
connection)
1475
1560
try:
1476
1561
document = xml.dom.minidom.parseString(xmlstring)
1477
1562
1478
1563
for if_tag in document.getElementsByTagName("interface"):
1479
1564
# Fix argument name for the GetManagedObjects method
1480
1565
if (if_tag.getAttribute("name")
1481
== dbus.OBJECT_MANAGER_IFACE):
1566
== dbus.OBJECT_MANAGER_IFACE):
1482
1567
for cn in if_tag.getElementsByTagName("method"):
1483
1568
if (cn.getAttribute("name")
1484
1569
== "GetManagedObjects"):
1494
1579
except (AttributeError, xml.dom.DOMException,
1495
1580
xml.parsers.expat.ExpatError) as error:
1496
1581
logger.error("Failed to override Introspection method",
1497
exc_info = error)
1582
exc_info=error)
1498
1583
return xmlstring
1499
1584
1585
1500
1586
def datetime_to_dbus(dt, variant_level=0):
1501
1587
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1502
1588
if dt is None:
1503
return dbus.String("", variant_level = variant_level)
1589
return dbus.String("", variant_level=variant_level)
1504
1590
return dbus.String(dt.isoformat(), variant_level=variant_level)
1505
1591
1506
1592
1509
1595
dbus.service.Object, it will add alternate D-Bus attributes with
1510
1596
interface names according to the "alt_interface_names" mapping.
1511
1597
Usage:
1512
1598
1513
1599
@alternate_dbus_interfaces({"org.example.Interface":
1514
1600
"net.example.AlternateInterface"})
1515
1601
class SampleDBusObject(dbus.service.Object):
1516
1602
@dbus.service.method("org.example.Interface")
1517
1603
def SampleDBusMethod():
1518
1604
pass
1519
1605
1520
1606
The above "SampleDBusMethod" on "SampleDBusObject" will be
1521
1607
reachable via two interfaces: "org.example.Interface" and
1522
1608
"net.example.AlternateInterface", the latter of which will have
1523
1609
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1524
1610
"true", unless "deprecate" is passed with a False value.
1525
1611
1526
1612
This works for methods and signals, and also for D-Bus properties
1527
1613
(from DBusObjectWithProperties) and interfaces (from the
1528
1614
dbus_interface_annotations decorator).
1529
1615
"""
1530
1616
1531
1617
def wrapper(cls):
1532
1618
for orig_interface_name, alt_interface_name in (
1533
1619
alt_interface_names.items()):
1573
1659
attribute._dbus_annotations)
1574
1660
except AttributeError:
1575
1661
pass
1662
1576
1663
# Define a creator of a function to call both the
1577
1664
# original and alternate functions, so both the
1578
1665
# original and alternate signals gets sent when
1581
1668
"""This function is a scope container to pass
1582
1669
func1 and func2 to the "call_both" function
1583
1670
outside of its arguments"""
1584
1671
1585
1672
@functools.wraps(func2)
1586
1673
def call_both(*args, **kwargs):
1587
1674
"""This function will emit two D-Bus
1588
1675
signals by calling func1 and func2"""
1589
1676
func1(*args, **kwargs)
1590
1677
func2(*args, **kwargs)
1591
# Make wrapper function look like a D-Bus signal
1678
# Make wrapper function look like a D-Bus
1679
# signal
1592
1680
for name, attr in inspect.getmembers(func2):
1593
1681
if name.startswith("_dbus_"):
1594
1682
setattr(call_both, name, attr)
1595
1683
1596
1684
return call_both
1597
1685
# Create the "call_both" function and add it to
1598
1686
# the class
1644
1732
(copy_function(attribute)))
1645
1733
if deprecate:
1646
1734
# Deprecate all alternate interfaces
1647
iname="_AlternateDBusNames_interface_annotation{}"
1735
iname = "_AlternateDBusNames_interface_annotation{}"
1648
1736
for interface_name in interface_names:
1649
1737
1650
1738
@dbus_interface_annotations(interface_name)
1651
1739
def func(self):
1652
return { "org.freedesktop.DBus.Deprecated":
1653
"true" }
1740
return {"org.freedesktop.DBus.Deprecated":
1741
"true"}
1654
1742
# Find an unused name
1655
1743
for aname in (iname.format(i)
1656
1744
for i in itertools.count()):
1667
1755
cls = type("{}Alternate".format(cls.__name__),
1668
1756
(cls, ), attr)
1669
1757
return cls
1670
1758
1671
1759
return wrapper
1672
1760
1673
1761
1675
1763
"se.bsnet.fukt.Mandos"})
1676
1764
class ClientDBus(Client, DBusObjectWithProperties):
1677
1765
"""A Client class using D-Bus
1678
1766
1679
1767
Attributes:
1680
1768
dbus_object_path: dbus.ObjectPath
1681
1769
bus: dbus.SystemBus()
1682
1770
"""
1683
1771
1684
1772
runtime_expansions = (Client.runtime_expansions
1685
1773
+ ("dbus_object_path", ))
1686
1774
1687
1775
_interface = "se.recompile.Mandos.Client"
1688
1776
1689
1777
# dbus.service.Object doesn't use super(), so we can't either.
1690
1691
def __init__(self, bus = None, *args, **kwargs):
1778
1779
def __init__(self, bus=None, *args, **kwargs):
1692
1780
self.bus = bus
1693
1781
Client.__init__(self, *args, **kwargs)
1694
1782
# Only now, when this client is initialized, can it show up on
1700
1788
"/clients/" + client_object_name)
1701
1789
DBusObjectWithProperties.__init__(self, self.bus,
1702
1790
self.dbus_object_path)
1703
1791
1704
1792
def notifychangeproperty(transform_func, dbus_name,
1705
1793
type_func=lambda x: x,
1706
1794
variant_level=1,
1708
1796
_interface=_interface):
1709
1797
""" Modify a variable so that it's a property which announces
1710
1798
its changes to DBus.
1711
1799
1712
1800
transform_fun: Function that takes a value and a variant_level
1713
1801
and transforms it to a D-Bus type.
1714
1802
dbus_name: D-Bus name of the variable
1717
1805
variant_level: D-Bus variant level. Default: 1
1718
1806
"""
1719
1807
attrname = "_{}".format(dbus_name)
1720
1808
1721
1809
def setter(self, value):
1722
1810
if hasattr(self, "dbus_object_path"):
1723
1811
if (not hasattr(self, attrname) or
1730
1818
else:
1731
1819
dbus_value = transform_func(
1732
1820
type_func(value),
1733
variant_level = variant_level)
1821
variant_level=variant_level)
1734
1822
self.PropertyChanged(dbus.String(dbus_name),
1735
1823
dbus_value)
1736
1824
self.PropertiesChanged(
1737
1825
_interface,
1738
dbus.Dictionary({ dbus.String(dbus_name):
1739
dbus_value }),
1826
dbus.Dictionary({dbus.String(dbus_name):
1827
dbus_value}),
1740
1828
dbus.Array())
1741
1829
setattr(self, attrname, value)
1742
1830
1743
1831
return property(lambda self: getattr(self, attrname), setter)
1744
1832
1745
1833
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1746
1834
approvals_pending = notifychangeproperty(dbus.Boolean,
1747
1835
"ApprovalPending",
1748
type_func = bool)
1836
type_func=bool)
1749
1837
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1750
1838
last_enabled = notifychangeproperty(datetime_to_dbus,
1751
1839
"LastEnabled")
1752
1840
checker = notifychangeproperty(
1753
1841
dbus.Boolean, "CheckerRunning",
1754
type_func = lambda checker: checker is not None)
1842
type_func=lambda checker: checker is not None)
1755
1843
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1756
1844
"LastCheckedOK")
1757
1845
last_checker_status = notifychangeproperty(dbus.Int16,
1762
1850
"ApprovedByDefault")
1763
1851
approval_delay = notifychangeproperty(
1764
1852
dbus.UInt64, "ApprovalDelay",
1765
type_func = lambda td: td.total_seconds() * 1000)
1853
type_func=lambda td: td.total_seconds() * 1000)
1766
1854
approval_duration = notifychangeproperty(
1767
1855
dbus.UInt64, "ApprovalDuration",
1768
type_func = lambda td: td.total_seconds() * 1000)
1856
type_func=lambda td: td.total_seconds() * 1000)
1769
1857
host = notifychangeproperty(dbus.String, "Host")
1770
1858
timeout = notifychangeproperty(
1771
1859
dbus.UInt64, "Timeout",
1772
type_func = lambda td: td.total_seconds() * 1000)
1860
type_func=lambda td: td.total_seconds() * 1000)
1773
1861
extended_timeout = notifychangeproperty(
1774
1862
dbus.UInt64, "ExtendedTimeout",
1775
type_func = lambda td: td.total_seconds() * 1000)
1863
type_func=lambda td: td.total_seconds() * 1000)
1776
1864
interval = notifychangeproperty(
1777
1865
dbus.UInt64, "Interval",
1778
type_func = lambda td: td.total_seconds() * 1000)
1866
type_func=lambda td: td.total_seconds() * 1000)
1779
1867
checker_command = notifychangeproperty(dbus.String, "Checker")
1780
1868
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1781
1869
invalidate_only=True)
1782
1870
1783
1871
del notifychangeproperty
1784
1872
1785
1873
def __del__(self, *args, **kwargs):
1786
1874
try:
1787
1875
self.remove_from_connection()
1790
1878
if hasattr(DBusObjectWithProperties, "__del__"):
1791
1879
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1792
1880
Client.__del__(self, *args, **kwargs)
1793
1881
1794
1882
def checker_callback(self, source, condition,
1795
1883
connection, command, *args, **kwargs):
1796
1884
ret = Client.checker_callback(self, source, condition,
1812
1900
| self.last_checker_signal),
1813
1901
dbus.String(command))
1814
1902
return ret
1815
1903
1816
1904
def start_checker(self, *args, **kwargs):
1817
1905
old_checker_pid = getattr(self.checker, "pid", None)
1818
1906
r = Client.start_checker(self, *args, **kwargs)
1822
1910
# Emit D-Bus signal
1823
1911
self.CheckerStarted(self.current_checker_command)
1824
1912
return r
1825
1913
1826
1914
def _reset_approved(self):
1827
1915
self.approved = None
1828
1916
return False
1829
1917
1830
1918
def approve(self, value=True):
1831
1919
self.approved = value
1832
1920
GLib.timeout_add(int(self.approval_duration.total_seconds()
1833
1921
* 1000), self._reset_approved)
1834
1922
self.send_changedstate()
1835
1836
## D-Bus methods, signals & properties
1837
1838
## Interfaces
1839
1840
## Signals
1841
1923
1924
# D-Bus methods, signals & properties
1925
1926
# Interfaces
1927
1928
# Signals
1929
1842
1930
# CheckerCompleted - signal
1843
1931
@dbus.service.signal(_interface, signature="nxs")
1844
1932
def CheckerCompleted(self, exitcode, waitstatus, command):
1845
1933
"D-Bus signal"
1846
1934
pass
1847
1935
1848
1936
# CheckerStarted - signal
1849
1937
@dbus.service.signal(_interface, signature="s")
1850
1938
def CheckerStarted(self, command):
1851
1939
"D-Bus signal"
1852
1940
pass
1853
1941
1854
1942
# PropertyChanged - signal
1855
1943
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1856
1944
@dbus.service.signal(_interface, signature="sv")
1857
1945
def PropertyChanged(self, property, value):
1858
1946
"D-Bus signal"
1859
1947
pass
1860
1948
1861
1949
# GotSecret - signal
1862
1950
@dbus.service.signal(_interface)
1863
1951
def GotSecret(self):
1866
1954
server to mandos-client
1867
1955
"""
1868
1956
pass
1869
1957
1870
1958
# Rejected - signal
1871
1959
@dbus.service.signal(_interface, signature="s")
1872
1960
def Rejected(self, reason):
1873
1961
"D-Bus signal"
1874
1962
pass
1875
1963
1876
1964
# NeedApproval - signal
1877
1965
@dbus.service.signal(_interface, signature="tb")
1878
1966
def NeedApproval(self, timeout, default):
1879
1967
"D-Bus signal"
1880
1968
return self.need_approval()
1881
1882
## Methods
1883
1969
1970
# Methods
1971
1884
1972
# Approve - method
1885
1973
@dbus.service.method(_interface, in_signature="b")
1886
1974
def Approve(self, value):
1887
1975
self.approve(value)
1888
1976
1889
1977
# CheckedOK - method
1890
1978
@dbus.service.method(_interface)
1891
1979
def CheckedOK(self):
1892
1980
self.checked_ok()
1893
1981
1894
1982
# Enable - method
1895
1983
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1896
1984
@dbus.service.method(_interface)
1897
1985
def Enable(self):
1898
1986
"D-Bus method"
1899
1987
self.enable()
1900
1988
1901
1989
# StartChecker - method
1902
1990
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1903
1991
@dbus.service.method(_interface)
1904
1992
def StartChecker(self):
1905
1993
"D-Bus method"
1906
1994
self.start_checker()
1907
1995
1908
1996
# Disable - method
1909
1997
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1910
1998
@dbus.service.method(_interface)
1911
1999
def Disable(self):
1912
2000
"D-Bus method"
1913
2001
self.disable()
1914
2002
1915
2003
# StopChecker - method
1916
2004
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1917
2005
@dbus.service.method(_interface)
1918
2006
def StopChecker(self):
1919
2007
self.stop_checker()
1920
1921
## Properties
1922
2008
2009
# Properties
2010
1923
2011
# ApprovalPending - property
1924
2012
@dbus_service_property(_interface, signature="b", access="read")
1925
2013
def ApprovalPending_dbus_property(self):
1926
2014
return dbus.Boolean(bool(self.approvals_pending))
1927
2015
1928
2016
# ApprovedByDefault - property
1929
2017
@dbus_service_property(_interface,
1930
2018
signature="b",
1933
2021
if value is None: # get
1934
2022
return dbus.Boolean(self.approved_by_default)
1935
2023
self.approved_by_default = bool(value)
1936
2024
1937
2025
# ApprovalDelay - property
1938
2026
@dbus_service_property(_interface,
1939
2027
signature="t",
1943
2031
return dbus.UInt64(self.approval_delay.total_seconds()
1944
2032
* 1000)
1945
2033
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1946
2034
1947
2035
# ApprovalDuration - property
1948
2036
@dbus_service_property(_interface,
1949
2037
signature="t",
1953
2041
return dbus.UInt64(self.approval_duration.total_seconds()
1954
2042
* 1000)
1955
2043
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1956
2044
1957
2045
# Name - property
1958
2046
@dbus_annotations(
1959
2047
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1960
2048
@dbus_service_property(_interface, signature="s", access="read")
1961
2049
def Name_dbus_property(self):
1962
2050
return dbus.String(self.name)
1963
2051
2052
# KeyID - property
2053
@dbus_annotations(
2054
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2055
@dbus_service_property(_interface, signature="s", access="read")
2056
def KeyID_dbus_property(self):
2057
return dbus.String(self.key_id)
2058
1964
2059
# Fingerprint - property
1965
2060
@dbus_annotations(
1966
2061
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1967
2062
@dbus_service_property(_interface, signature="s", access="read")
1968
2063
def Fingerprint_dbus_property(self):
1969
2064
return dbus.String(self.fingerprint)
1970
2065
1971
2066
# Host - property
1972
2067
@dbus_service_property(_interface,
1973
2068
signature="s",
1976
2071
if value is None: # get
1977
2072
return dbus.String(self.host)
1978
2073
self.host = str(value)
1979
2074
1980
2075
# Created - property
1981
2076
@dbus_annotations(
1982
2077
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1983
2078
@dbus_service_property(_interface, signature="s", access="read")
1984
2079
def Created_dbus_property(self):
1985
2080
return datetime_to_dbus(self.created)
1986
2081
1987
2082
# LastEnabled - property
1988
2083
@dbus_service_property(_interface, signature="s", access="read")
1989
2084
def LastEnabled_dbus_property(self):
1990
2085
return datetime_to_dbus(self.last_enabled)
1991
2086
1992
2087
# Enabled - property
1993
2088
@dbus_service_property(_interface,
1994
2089
signature="b",
2000
2095
self.enable()
2001
2096
else:
2002
2097
self.disable()
2003
2098
2004
2099
# LastCheckedOK - property
2005
2100
@dbus_service_property(_interface,
2006
2101
signature="s",
2010
2105
self.checked_ok()
2011
2106
return
2012
2107
return datetime_to_dbus(self.last_checked_ok)
2013
2108
2014
2109
# LastCheckerStatus - property
2015
2110
@dbus_service_property(_interface, signature="n", access="read")
2016
2111
def LastCheckerStatus_dbus_property(self):
2017
2112
return dbus.Int16(self.last_checker_status)
2018
2113
2019
2114
# Expires - property
2020
2115
@dbus_service_property(_interface, signature="s", access="read")
2021
2116
def Expires_dbus_property(self):
2022
2117
return datetime_to_dbus(self.expires)
2023
2118
2024
2119
# LastApprovalRequest - property
2025
2120
@dbus_service_property(_interface, signature="s", access="read")
2026
2121
def LastApprovalRequest_dbus_property(self):
2027
2122
return datetime_to_dbus(self.last_approval_request)
2028
2123
2029
2124
# Timeout - property
2030
2125
@dbus_service_property(_interface,
2031
2126
signature="t",
2050
2145
self.disable_initiator_tag = GLib.timeout_add(
2051
2146
int((self.expires - now).total_seconds() * 1000),
2052
2147
self.disable)
2053
2148
2054
2149
# ExtendedTimeout - property
2055
2150
@dbus_service_property(_interface,
2056
2151
signature="t",
2060
2155
return dbus.UInt64(self.extended_timeout.total_seconds()
2061
2156
* 1000)
2062
2157
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2063
2158
2064
2159
# Interval - property
2065
2160
@dbus_service_property(_interface,
2066
2161
signature="t",
2076
2171
GLib.source_remove(self.checker_initiator_tag)
2077
2172
self.checker_initiator_tag = GLib.timeout_add(
2078
2173
value, self.start_checker)
2079
self.start_checker() # Start one now, too
2080
2174
self.start_checker() # Start one now, too
2175
2081
2176
# Checker - property
2082
2177
@dbus_service_property(_interface,
2083
2178
signature="s",
2086
2181
if value is None: # get
2087
2182
return dbus.String(self.checker_command)
2088
2183
self.checker_command = str(value)
2089
2184
2090
2185
# CheckerRunning - property
2091
2186
@dbus_service_property(_interface,
2092
2187
signature="b",
2098
2193
self.start_checker()
2099
2194
else:
2100
2195
self.stop_checker()
2101
2196
2102
2197
# ObjectPath - property
2103
2198
@dbus_annotations(
2104
2199
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2105
2200
"org.freedesktop.DBus.Deprecated": "true"})
2106
2201
@dbus_service_property(_interface, signature="o", access="read")
2107
2202
def ObjectPath_dbus_property(self):
2108
return self.dbus_object_path # is already a dbus.ObjectPath
2109
2203
return self.dbus_object_path # is already a dbus.ObjectPath
2204
2110
2205
# Secret = property
2111
2206
@dbus_annotations(
2112
2207
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2117
2212
byte_arrays=True)
2118
2213
def Secret_dbus_property(self, value):
2119
2214
self.secret = bytes(value)
2120
2215
2121
2216
del _interface
2122
2217
2123
2218
2124
class ProxyClient(object):
2125
def __init__(self, child_pipe, fpr, address):
2219
class ProxyClient:
2220
def __init__(self, child_pipe, key_id, fpr, address):
2126
2221
self._pipe = child_pipe
2127
self._pipe.send(('init', fpr, address))
2222
self._pipe.send(('init', key_id, fpr, address))
2128
2223
if not self._pipe.recv():
2129
raise KeyError(fpr)
2130
2224
raise KeyError(key_id or fpr)
2225
2131
2226
def __getattribute__(self, name):
2132
2227
if name == '_pipe':
2133
2228
return super(ProxyClient, self).__getattribute__(name)
2136
2231
if data[0] == 'data':
2137
2232
return data[1]
2138
2233
if data[0] == 'function':
2139
2234
2140
2235
def func(*args, **kwargs):
2141
2236
self._pipe.send(('funcall', name, args, kwargs))
2142
2237
return self._pipe.recv()[1]
2143
2238
2144
2239
return func
2145
2240
2146
2241
def __setattr__(self, name, value):
2147
2242
if name == '_pipe':
2148
2243
return super(ProxyClient, self).__setattr__(name, value)
2151
2246
2152
2247
class ClientHandler(socketserver.BaseRequestHandler, object):
2153
2248
"""A class to handle client connections.
2154
2249
2155
2250
Instantiated once for each connection to handle it.
2156
2251
Note: This will run in its own forked process."""
2157
2252
2158
2253
def handle(self):
2159
2254
with contextlib.closing(self.server.child_pipe) as child_pipe:
2160
2255
logger.info("TCP connection from: %s",
2161
2256
str(self.client_address))
2162
2257
logger.debug("Pipe FD: %d",
2163
2258
self.server.child_pipe.fileno())
2164
2259
2165
2260
session = gnutls.ClientSession(self.request)
2166
2167
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
2168
# "+AES-256-CBC", "+SHA1",
2169
# "+COMP-NULL", "+CTYPE-OPENPGP",
2170
# "+DHE-DSS"))
2261
2262
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2263
# "+AES-256-CBC", "+SHA1",
2264
# "+COMP-NULL", "+CTYPE-OPENPGP",
2265
# "+DHE-DSS"))
2171
2266
# Use a fallback default, since this MUST be set.
2172
2267
priority = self.server.gnutls_priority
2173
2268
if priority is None:
2174
2269
priority = "NORMAL"
2175
gnutls.priority_set_direct(session._c_object, priority,
2270
gnutls.priority_set_direct(session._c_object,
2271
priority.encode("utf-8"),
2176
2272
None)
2177
2273
2178
2274
# Start communication using the Mandos protocol
2179
2275
# Get protocol number
2180
2276
line = self.request.makefile().readline()
2185
2281
except (ValueError, IndexError, RuntimeError) as error:
2186
2282
logger.error("Unknown protocol version: %s", error)
2187
2283
return
2188
2284
2189
2285
# Start GnuTLS connection
2190
2286
try:
2191
2287
session.handshake()
2195
2291
# established. Just abandon the request.
2196
2292
return
2197
2293
logger.debug("Handshake succeeded")
2198
2294
2199
2295
approval_required = False
2200
2296
try:
2201
try:
2202
fpr = self.fingerprint(
2203
self.peer_certificate(session))
2204
except (TypeError, gnutls.Error) as error:
2205
logger.warning("Bad certificate: %s", error)
2206
return
2207
logger.debug("Fingerprint: %s", fpr)
2208
2209
try:
2210
client = ProxyClient(child_pipe, fpr,
2297
if gnutls.has_rawpk:
2298
fpr = b""
2299
try:
2300
key_id = self.key_id(
2301
self.peer_certificate(session))
2302
except (TypeError, gnutls.Error) as error:
2303
logger.warning("Bad certificate: %s", error)
2304
return
2305
logger.debug("Key ID: %s", key_id)
2306
2307
else:
2308
key_id = b""
2309
try:
2310
fpr = self.fingerprint(
2311
self.peer_certificate(session))
2312
except (TypeError, gnutls.Error) as error:
2313
logger.warning("Bad certificate: %s", error)
2314
return
2315
logger.debug("Fingerprint: %s", fpr)
2316
2317
try:
2318
client = ProxyClient(child_pipe, key_id, fpr,
2211
2319
self.client_address)
2212
2320
except KeyError:
2213
2321
return
2214
2322
2215
2323
if client.approval_delay:
2216
2324
delay = client.approval_delay
2217
2325
client.approvals_pending += 1
2218
2326
approval_required = True
2219
2327
2220
2328
while True:
2221
2329
if not client.enabled:
2222
2330
logger.info("Client %s is disabled",
2225
2333
# Emit D-Bus signal
2226
2334
client.Rejected("Disabled")
2227
2335
return
2228
2336
2229
2337
if client.approved or not client.approval_delay:
2230
#We are approved or approval is disabled
2338
# We are approved or approval is disabled
2231
2339
break
2232
2340
elif client.approved is None:
2233
2341
logger.info("Client %s needs approval",
2244
2352
# Emit D-Bus signal
2245
2353
client.Rejected("Denied")
2246
2354
return
2247
2248
#wait until timeout or approved
2355
2356
# wait until timeout or approved
2249
2357
time = datetime.datetime.now()
2250
2358
client.changedstate.acquire()
2251
2359
client.changedstate.wait(delay.total_seconds())
2264
2372
break
2265
2373
else:
2266
2374
delay -= time2 - time
2267
2375
2268
2376
try:
2269
2377
session.send(client.secret)
2270
2378
except gnutls.Error as error:
2271
2379
logger.warning("gnutls send failed",
2272
exc_info = error)
2380
exc_info=error)
2273
2381
return
2274
2382
2275
2383
logger.info("Sending secret to %s", client.name)
2276
2384
# bump the timeout using extended_timeout
2277
2385
client.bump_timeout(client.extended_timeout)
2278
2386
if self.server.use_dbus:
2279
2387
# Emit D-Bus signal
2280
2388
client.GotSecret()
2281
2389
2282
2390
finally:
2283
2391
if approval_required:
2284
2392
client.approvals_pending -= 1
2287
2395
except gnutls.Error as error:
2288
2396
logger.warning("GnuTLS bye failed",
2289
2397
exc_info=error)
2290
2398
2291
2399
@staticmethod
2292
2400
def peer_certificate(session):
2293
"Return the peer's OpenPGP certificate as a bytestring"
2294
# If not an OpenPGP certificate...
2295
if (gnutls.certificate_type_get(session._c_object)
2296
!= gnutls.CRT_OPENPGP):
2401
"Return the peer's certificate as a bytestring"
2402
try:
2403
cert_type = gnutls.certificate_type_get2(session._c_object,
2404
gnutls.CTYPE_PEERS)
2405
except AttributeError:
2406
cert_type = gnutls.certificate_type_get(session._c_object)
2407
if gnutls.has_rawpk:
2408
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2409
else:
2410
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2411
# If not a valid certificate type...
2412
if cert_type not in valid_cert_types:
2413
logger.info("Cert type %r not in %r", cert_type,
2414
valid_cert_types)
2297
2415
# ...return invalid data
2298
2416
return b""
2299
2417
list_size = ctypes.c_uint(1)
2305
2423
return None
2306
2424
cert = cert_list[0]
2307
2425
return ctypes.string_at(cert.data, cert.size)
2308
2426
2427
@staticmethod
2428
def key_id(certificate):
2429
"Convert a certificate bytestring to a hexdigit key ID"
2430
# New GnuTLS "datum" with the public key
2431
datum = gnutls.datum_t(
2432
ctypes.cast(ctypes.c_char_p(certificate),
2433
ctypes.POINTER(ctypes.c_ubyte)),
2434
ctypes.c_uint(len(certificate)))
2435
# XXX all these need to be created in the gnutls "module"
2436
# New empty GnuTLS certificate
2437
pubkey = gnutls.pubkey_t()
2438
gnutls.pubkey_init(ctypes.byref(pubkey))
2439
# Import the raw public key into the certificate
2440
gnutls.pubkey_import(pubkey,
2441
ctypes.byref(datum),
2442
gnutls.X509_FMT_DER)
2443
# New buffer for the key ID
2444
buf = ctypes.create_string_buffer(32)
2445
buf_len = ctypes.c_size_t(len(buf))
2446
# Get the key ID from the raw public key into the buffer
2447
gnutls.pubkey_get_key_id(pubkey,
2448
gnutls.KEYID_USE_SHA256,
2449
ctypes.cast(ctypes.byref(buf),
2450
ctypes.POINTER(ctypes.c_ubyte)),
2451
ctypes.byref(buf_len))
2452
# Deinit the certificate
2453
gnutls.pubkey_deinit(pubkey)
2454
2455
# Convert the buffer to a Python bytestring
2456
key_id = ctypes.string_at(buf, buf_len.value)
2457
# Convert the bytestring to hexadecimal notation
2458
hex_key_id = binascii.hexlify(key_id).upper()
2459
return hex_key_id
2460
2309
2461
@staticmethod
2310
2462
def fingerprint(openpgp):
2311
2463
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2326
2478
ctypes.byref(crtverify))
2327
2479
if crtverify.value != 0:
2328
2480
gnutls.openpgp_crt_deinit(crt)
2329
raise gnutls.CertificateSecurityError("Verify failed")
2481
raise gnutls.CertificateSecurityError(code
2482
=crtverify.value)
2330
2483
# New buffer for the fingerprint
2331
2484
buf = ctypes.create_string_buffer(20)
2332
2485
buf_len = ctypes.c_size_t()
2342
2495
return hex_fpr
2343
2496
2344
2497
2345
class MultiprocessingMixIn(object):
2498
class MultiprocessingMixIn:
2346
2499
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2347
2500
2348
2501
def sub_process_main(self, request, address):
2349
2502
try:
2350
2503
self.finish_request(request, address)
2351
2504
except Exception:
2352
2505
self.handle_error(request, address)
2353
2506
self.close_request(request)
2354
2507
2355
2508
def process_request(self, request, address):
2356
2509
"""Start a new process to process the request."""
2357
proc = multiprocessing.Process(target = self.sub_process_main,
2358
args = (request, address))
2510
proc = multiprocessing.Process(target=self.sub_process_main,
2511
args=(request, address))
2359
2512
proc.start()
2360
2513
return proc
2361
2514
2362
2515
2363
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2516
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
2364
2517
""" adds a pipe to the MixIn """
2365
2518
2366
2519
def process_request(self, request, client_address):
2367
2520
"""Overrides and wraps the original process_request().
2368
2521
2369
2522
This function creates a new pipe in self.pipe
2370
2523
"""
2371
2524
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2372
2525
2373
2526
proc = MultiprocessingMixIn.process_request(self, request,
2374
2527
client_address)
2375
2528
self.child_pipe.close()
2376
2529
self.add_pipe(parent_pipe, proc)
2377
2530
2378
2531
def add_pipe(self, parent_pipe, proc):
2379
2532
"""Dummy function; override as necessary"""
2380
2533
raise NotImplementedError()
2381
2534
2382
2535
2383
2536
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2384
socketserver.TCPServer, object):
2537
socketserver.TCPServer):
2385
2538
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2386
2539
2387
2540
Attributes:
2388
2541
enabled: Boolean; whether this server is activated yet
2389
2542
interface: None or a network interface name (string)
2390
2543
use_ipv6: Boolean; to use IPv6 or not
2391
2544
"""
2392
2545
2393
2546
def __init__(self, server_address, RequestHandlerClass,
2394
2547
interface=None,
2395
2548
use_ipv6=True,
2405
2558
self.socketfd = socketfd
2406
2559
# Save the original socket.socket() function
2407
2560
self.socket_socket = socket.socket
2561
2408
2562
# To implement --socket, we monkey patch socket.socket.
2409
#
2563
#
2410
2564
# (When socketserver.TCPServer is a new-style class, we
2411
2565
# could make self.socket into a property instead of monkey
2412
2566
# patching socket.socket.)
2413
#
2567
#
2414
2568
# Create a one-time-only replacement for socket.socket()
2415
2569
@functools.wraps(socket.socket)
2416
2570
def socket_wrapper(*args, **kwargs):
2428
2582
# socket_wrapper(), if socketfd was set.
2429
2583
socketserver.TCPServer.__init__(self, server_address,
2430
2584
RequestHandlerClass)
2431
2585
2432
2586
def server_bind(self):
2433
2587
"""This overrides the normal server_bind() function
2434
2588
to bind to an interface if one was specified, and also NOT to
2435
2589
bind to an address or port if they were not specified."""
2590
global SO_BINDTODEVICE
2436
2591
if self.interface is not None:
2437
2592
if SO_BINDTODEVICE is None:
2438
logger.error("SO_BINDTODEVICE does not exist;"
2439
" cannot bind to interface %s",
2440
self.interface)
2441
else:
2442
try:
2443
self.socket.setsockopt(
2444
socket.SOL_SOCKET, SO_BINDTODEVICE,
2445
(self.interface + "\0").encode("utf-8"))
2446
except socket.error as error:
2447
if error.errno == errno.EPERM:
2448
logger.error("No permission to bind to"
2449
" interface %s", self.interface)
2450
elif error.errno == errno.ENOPROTOOPT:
2451
logger.error("SO_BINDTODEVICE not available;"
2452
" cannot bind to interface %s",
2453
self.interface)
2454
elif error.errno == errno.ENODEV:
2455
logger.error("Interface %s does not exist,"
2456
" cannot bind", self.interface)
2457
else:
2458
raise
2593
# Fall back to a hard-coded value which seems to be
2594
# common enough.
2595
logger.warning("SO_BINDTODEVICE not found, trying 25")
2596
SO_BINDTODEVICE = 25
2597
try:
2598
self.socket.setsockopt(
2599
socket.SOL_SOCKET, SO_BINDTODEVICE,
2600
(self.interface + "\0").encode("utf-8"))
2601
except socket.error as error:
2602
if error.errno == errno.EPERM:
2603
logger.error("No permission to bind to"
2604
" interface %s", self.interface)
2605
elif error.errno == errno.ENOPROTOOPT:
2606
logger.error("SO_BINDTODEVICE not available;"
2607
" cannot bind to interface %s",
2608
self.interface)
2609
elif error.errno == errno.ENODEV:
2610
logger.error("Interface %s does not exist,"
2611
" cannot bind", self.interface)
2612
else:
2613
raise
2459
2614
# Only bind(2) the socket if we really need to.
2460
2615
if self.server_address[0] or self.server_address[1]:
2616
if self.server_address[1]:
2617
self.allow_reuse_address = True
2461
2618
if not self.server_address[0]:
2462
2619
if self.address_family == socket.AF_INET6:
2463
any_address = "::" # in6addr_any
2620
any_address = "::" # in6addr_any
2464
2621
else:
2465
any_address = "0.0.0.0" # INADDR_ANY
2622
any_address = "0.0.0.0" # INADDR_ANY
2466
2623
self.server_address = (any_address,
2467
2624
self.server_address[1])
2468
2625
elif not self.server_address[1]:
2478
2635
2479
2636
class MandosServer(IPv6_TCPServer):
2480
2637
"""Mandos server.
2481
2638
2482
2639
Attributes:
2483
2640
clients: set of Client objects
2484
2641
gnutls_priority GnuTLS priority string
2485
2642
use_dbus: Boolean; to emit D-Bus signals or not
2486
2643
2487
2644
Assumes a GLib.MainLoop event loop.
2488
2645
"""
2489
2646
2490
2647
def __init__(self, server_address, RequestHandlerClass,
2491
2648
interface=None,
2492
2649
use_ipv6=True,
2502
2659
self.gnutls_priority = gnutls_priority
2503
2660
IPv6_TCPServer.__init__(self, server_address,
2504
2661
RequestHandlerClass,
2505
interface = interface,
2506
use_ipv6 = use_ipv6,
2507
socketfd = socketfd)
2508
2662
interface=interface,
2663
use_ipv6=use_ipv6,
2664
socketfd=socketfd)
2665
2509
2666
def server_activate(self):
2510
2667
if self.enabled:
2511
2668
return socketserver.TCPServer.server_activate(self)
2512
2669
2513
2670
def enable(self):
2514
2671
self.enabled = True
2515
2672
2516
2673
def add_pipe(self, parent_pipe, proc):
2517
2674
# Call "handle_ipc" for both data and EOF events
2518
2675
GLib.io_add_watch(
2519
2676
parent_pipe.fileno(),
2520
2677
GLib.IO_IN | GLib.IO_HUP,
2521
2678
functools.partial(self.handle_ipc,
2522
parent_pipe = parent_pipe,
2523
proc = proc))
2524
2679
parent_pipe=parent_pipe,
2680
proc=proc))
2681
2525
2682
def handle_ipc(self, source, condition,
2526
2683
parent_pipe=None,
2527
proc = None,
2684
proc=None,
2528
2685
client_object=None):
2529
2686
# error, or the other end of multiprocessing.Pipe has closed
2530
2687
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2531
2688
# Wait for other process to exit
2532
2689
proc.join()
2533
2690
return False
2534
2691
2535
2692
# Read a request from the child
2536
2693
request = parent_pipe.recv()
2537
2694
command = request[0]
2538
2695
2539
2696
if command == 'init':
2540
fpr = request[1]
2541
address = request[2]
2542
2697
key_id = request[1].decode("ascii")
2698
fpr = request[2].decode("ascii")
2699
address = request[3]
2700
2543
2701
for c in self.clients.values():
2544
if c.fingerprint == fpr:
2702
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2703
continue
2704
if key_id and c.key_id == key_id:
2705
client = c
2706
break
2707
if fpr and c.fingerprint == fpr:
2545
2708
client = c
2546
2709
break
2547
2710
else:
2548
logger.info("Client not found for fingerprint: %s, ad"
2549
"dress: %s", fpr, address)
2711
logger.info("Client not found for key ID: %s, address"
2712
": %s", key_id or fpr, address)
2550
2713
if self.use_dbus:
2551
2714
# Emit D-Bus signal
2552
mandos_dbus_service.ClientNotFound(fpr,
2715
mandos_dbus_service.ClientNotFound(key_id or fpr,
2553
2716
address[0])
2554
2717
parent_pipe.send(False)
2555
2718
return False
2556
2719
2557
2720
GLib.io_add_watch(
2558
2721
parent_pipe.fileno(),
2559
2722
GLib.IO_IN | GLib.IO_HUP,
2560
2723
functools.partial(self.handle_ipc,
2561
parent_pipe = parent_pipe,
2562
proc = proc,
2563
client_object = client))
2724
parent_pipe=parent_pipe,
2725
proc=proc,
2726
client_object=client))
2564
2727
parent_pipe.send(True)
2565
2728
# remove the old hook in favor of the new above hook on
2566
2729
# same fileno
2569
2732
funcname = request[1]
2570
2733
args = request[2]
2571
2734
kwargs = request[3]
2572
2735
2573
2736
parent_pipe.send(('data', getattr(client_object,
2574
2737
funcname)(*args,
2575
2738
**kwargs)))
2576
2739
2577
2740
if command == 'getattr':
2578
2741
attrname = request[1]
2579
2742
if isinstance(client_object.__getattribute__(attrname),
2582
2745
else:
2583
2746
parent_pipe.send((
2584
2747
'data', client_object.__getattribute__(attrname)))
2585
2748
2586
2749
if command == 'setattr':
2587
2750
attrname = request[1]
2588
2751
value = request[2]
2589
2752
setattr(client_object, attrname, value)
2590
2753
2591
2754
return True
2592
2755
2593
2756
2594
2757
def rfc3339_duration_to_delta(duration):
2595
2758
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2596
2759
2597
2760
>>> rfc3339_duration_to_delta("P7D")
2598
2761
datetime.timedelta(7)
2599
2762
>>> rfc3339_duration_to_delta("PT60S")
2609
2772
>>> rfc3339_duration_to_delta("P1DT3M20S")
2610
2773
datetime.timedelta(1, 200)
2611
2774
"""
2612
2775
2613
2776
# Parsing an RFC 3339 duration with regular expressions is not
2614
2777
# possible - there would have to be multiple places for the same
2615
2778
# values, like seconds. The current code, while more esoteric, is
2616
2779
# cleaner without depending on a parsing library. If Python had a
2617
2780
# built-in library for parsing we would use it, but we'd like to
2618
2781
# avoid excessive use of external libraries.
2619
2782
2620
2783
# New type for defining tokens, syntax, and semantics all-in-one
2621
2784
Token = collections.namedtuple("Token", (
2622
2785
"regexp", # To match token; if "value" is not None, must have
2655
2818
frozenset((token_year, token_month,
2656
2819
token_day, token_time,
2657
2820
token_week)))
2658
# Define starting values
2659
value = datetime.timedelta() # Value so far
2821
# Define starting values:
2822
# Value so far
2823
value = datetime.timedelta()
2660
2824
found_token = None
2661
followers = frozenset((token_duration, )) # Following valid tokens
2662
s = duration # String left to parse
2825
# Following valid tokens
2826
followers = frozenset((token_duration, ))
2827
# String left to parse
2828
s = duration
2663
2829
# Loop until end token is found
2664
2830
while found_token is not token_end:
2665
2831
# Search for any currently valid tokens
2689
2855
2690
2856
def string_to_delta(interval):
2691
2857
"""Parse a string and return a datetime.timedelta
2692
2858
2693
2859
>>> string_to_delta('7d')
2694
2860
datetime.timedelta(7)
2695
2861
>>> string_to_delta('60s')
2703
2869
>>> string_to_delta('5m 30s')
2704
2870
datetime.timedelta(0, 330)
2705
2871
"""
2706
2872
2707
2873
try:
2708
2874
return rfc3339_duration_to_delta(interval)
2709
2875
except ValueError:
2710
2876
pass
2711
2877
2712
2878
timevalue = datetime.timedelta(0)
2713
2879
for s in interval.split():
2714
2880
try:
2732
2898
return timevalue
2733
2899
2734
2900
2735
def daemon(nochdir = False, noclose = False):
2901
def daemon(nochdir=False, noclose=False):
2736
2902
"""See daemon(3). Standard BSD Unix function.
2737
2903
2738
2904
This should really exist as os.daemon, but it doesn't (yet)."""
2739
2905
if os.fork():
2740
2906
sys.exit()
2758
2924
2759
2925
2760
2926
def main():
2761
2927
2762
2928
##################################################################
2763
2929
# Parsing of options, both command line and config file
2764
2930
2765
2931
parser = argparse.ArgumentParser()
2766
2932
parser.add_argument("-v", "--version", action="version",
2767
version = "%(prog)s {}".format(version),
2933
version="%(prog)s {}".format(version),
2768
2934
help="show version number and exit")
2769
2935
parser.add_argument("-i", "--interface", metavar="IF",
2770
2936
help="Bind to interface IF")
2806
2972
parser.add_argument("--no-zeroconf", action="store_false",
2807
2973
dest="zeroconf", help="Do not use Zeroconf",
2808
2974
default=None)
2809
2975
2810
2976
options = parser.parse_args()
2811
2977
2812
2978
if options.check:
2813
2979
import doctest
2814
2980
fail_count, test_count = doctest.testmod()
2815
2981
sys.exit(os.EX_OK if fail_count == 0 else 1)
2816
2982
2817
2983
# Default values for config file for server-global settings
2818
server_defaults = { "interface": "",
2819
"address": "",
2820
"port": "",
2821
"debug": "False",
2822
"priority":
2823
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2824
":+SIGN-DSA-SHA256",
2825
"servicename": "Mandos",
2826
"use_dbus": "True",
2827
"use_ipv6": "True",
2828
"debuglevel": "",
2829
"restore": "True",
2830
"socket": "",
2831
"statedir": "/var/lib/mandos",
2832
"foreground": "False",
2833
"zeroconf": "True",
2834
}
2835
2984
if gnutls.has_rawpk:
2985
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2986
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2987
else:
2988
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2989
":+SIGN-DSA-SHA256")
2990
server_defaults = {"interface": "",
2991
"address": "",
2992
"port": "",
2993
"debug": "False",
2994
"priority": priority,
2995
"servicename": "Mandos",
2996
"use_dbus": "True",
2997
"use_ipv6": "True",
2998
"debuglevel": "",
2999
"restore": "True",
3000
"socket": "",
3001
"statedir": "/var/lib/mandos",
3002
"foreground": "False",
3003
"zeroconf": "True",
3004
}
3005
del priority
3006
2836
3007
# Parse config file for server-global settings
2837
server_config = configparser.SafeConfigParser(server_defaults)
3008
server_config = configparser.ConfigParser(server_defaults)
2838
3009
del server_defaults
2839
3010
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2840
# Convert the SafeConfigParser object to a dict
3011
# Convert the ConfigParser object to a dict
2841
3012
server_settings = server_config.defaults()
2842
3013
# Use the appropriate methods on the non-string config options
2843
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
3014
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3015
"foreground", "zeroconf"):
2844
3016
server_settings[option] = server_config.getboolean("DEFAULT",
2845
3017
option)
2846
3018
if server_settings["port"]:
2856
3028
server_settings["socket"] = os.dup(server_settings
2857
3029
["socket"])
2858
3030
del server_config
2859
3031
2860
3032
# Override the settings from the config file with command line
2861
3033
# options, if set.
2862
3034
for option in ("interface", "address", "port", "debug",
2880
3052
if server_settings["debug"]:
2881
3053
server_settings["foreground"] = True
2882
3054
# Now we have our good server settings in "server_settings"
2883
3055
2884
3056
##################################################################
2885
3057
2886
3058
if (not server_settings["zeroconf"]
2887
3059
and not (server_settings["port"]
2888
3060
or server_settings["socket"] != "")):
2889
3061
parser.error("Needs port or socket to work without Zeroconf")
2890
3062
2891
3063
# For convenience
2892
3064
debug = server_settings["debug"]
2893
3065
debuglevel = server_settings["debuglevel"]
2897
3069
stored_state_file)
2898
3070
foreground = server_settings["foreground"]
2899
3071
zeroconf = server_settings["zeroconf"]
2900
3072
2901
3073
if debug:
2902
3074
initlogger(debug, logging.DEBUG)
2903
3075
else:
2906
3078
else:
2907
3079
level = getattr(logging, debuglevel.upper())
2908
3080
initlogger(debug, level)
2909
3081
2910
3082
if server_settings["servicename"] != "Mandos":
2911
3083
syslogger.setFormatter(
2912
3084
logging.Formatter('Mandos ({}) [%(process)d]:'
2913
3085
' %(levelname)s: %(message)s'.format(
2914
3086
server_settings["servicename"])))
2915
3087
2916
3088
# Parse config file with clients
2917
client_config = configparser.SafeConfigParser(Client
2918
.client_defaults)
3089
client_config = configparser.ConfigParser(Client.client_defaults)
2919
3090
client_config.read(os.path.join(server_settings["configdir"],
2920
3091
"clients.conf"))
2921
3092
2922
3093
global mandos_dbus_service
2923
3094
mandos_dbus_service = None
2924
3095
2925
3096
socketfd = None
2926
3097
if server_settings["socket"] != "":
2927
3098
socketfd = server_settings["socket"]
2943
3114
except IOError as e:
2944
3115
logger.error("Could not open file %r", pidfilename,
2945
3116
exc_info=e)
2946
3117
2947
3118
for name, group in (("_mandos", "_mandos"),
2948
3119
("mandos", "mandos"),
2949
3120
("nobody", "nogroup")):
2967
3138
.format(uid, gid, os.strerror(error.errno)))
2968
3139
if error.errno != errno.EPERM:
2969
3140
raise
2970
3141
2971
3142
if debug:
2972
3143
# Enable all possible GnuTLS debugging
2973
3144
2974
3145
# "Use a log level over 10 to enable all debugging options."
2975
3146
# - GnuTLS manual
2976
3147
gnutls.global_set_log_level(11)
2977
3148
2978
3149
@gnutls.log_func
2979
3150
def debug_gnutls(level, string):
2980
3151
logger.debug("GnuTLS: %s", string[:-1])
2981
3152
2982
3153
gnutls.global_set_log_function(debug_gnutls)
2983
3154
2984
3155
# Redirect stdin so all checkers get /dev/null
2985
3156
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2986
3157
os.dup2(null, sys.stdin.fileno())
2987
3158
if null > 2:
2988
3159
os.close(null)
2989
3160
2990
3161
# Need to fork before connecting to D-Bus
2991
3162
if not foreground:
2992
3163
# Close all input and output, do double fork, etc.
2993
3164
daemon()
2994
2995
# multiprocessing will use threads, so before we use GLib we need
2996
# to inform GLib that threads will be used.
2997
GLib.threads_init()
2998
3165
3166
if gi.version_info < (3, 10, 2):
3167
# multiprocessing will use threads, so before we use GLib we
3168
# need to inform GLib that threads will be used.
3169
GLib.threads_init()
3170
2999
3171
global main_loop
3000
3172
# From the Avahi example code
3001
3173
DBusGMainLoop(set_as_default=True)
3018
3190
if zeroconf:
3019
3191
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3020
3192
service = AvahiServiceToSyslog(
3021
name = server_settings["servicename"],
3022
servicetype = "_mandos._tcp",
3023
protocol = protocol,
3024
bus = bus)
3193
name=server_settings["servicename"],
3194
servicetype="_mandos._tcp",
3195
protocol=protocol,
3196
bus=bus)
3025
3197
if server_settings["interface"]:
3026
3198
service.interface = if_nametoindex(
3027
3199
server_settings["interface"].encode("utf-8"))
3028
3200
3029
3201
global multiprocessing_manager
3030
3202
multiprocessing_manager = multiprocessing.Manager()
3031
3203
3032
3204
client_class = Client
3033
3205
if use_dbus:
3034
client_class = functools.partial(ClientDBus, bus = bus)
3035
3206
client_class = functools.partial(ClientDBus, bus=bus)
3207
3036
3208
client_settings = Client.config_parser(client_config)
3037
3209
old_client_settings = {}
3038
3210
clients_data = {}
3039
3211
3040
3212
# This is used to redirect stdout and stderr for checker processes
3041
3213
global wnull
3042
wnull = open(os.devnull, "w") # A writable /dev/null
3214
wnull = open(os.devnull, "w") # A writable /dev/null
3043
3215
# Only used if server is running in foreground but not in debug
3044
3216
# mode
3045
3217
if debug or not foreground:
3046
3218
wnull.close()
3047
3219
3048
3220
# Get client data and settings from last running state.
3049
3221
if server_settings["restore"]:
3050
3222
try:
3051
3223
with open(stored_state_path, "rb") as stored_state:
3052
if sys.version_info.major == 2:
3224
if sys.version_info.major == 2:
3053
3225
clients_data, old_client_settings = pickle.load(
3054
3226
stored_state)
3055
3227
else:
3056
3228
bytes_clients_data, bytes_old_client_settings = (
3057
pickle.load(stored_state, encoding = "bytes"))
3058
### Fix bytes to strings
3059
## clients_data
3229
pickle.load(stored_state, encoding="bytes"))
3230
# Fix bytes to strings
3231
# clients_data
3060
3232
# .keys()
3061
clients_data = { (key.decode("utf-8")
3062
if isinstance(key, bytes)
3063
else key): value
3064
for key, value in
3065
bytes_clients_data.items() }
3233
clients_data = {(key.decode("utf-8")
3234
if isinstance(key, bytes)
3235
else key): value
3236
for key, value in
3237
bytes_clients_data.items()}
3066
3238
del bytes_clients_data
3067
3239
for key in clients_data:
3068
value = { (k.decode("utf-8")
3069
if isinstance(k, bytes) else k): v
3070
for k, v in
3071
clients_data[key].items() }
3240
value = {(k.decode("utf-8")
3241
if isinstance(k, bytes) else k): v
3242
for k, v in
3243
clients_data[key].items()}
3072
3244
clients_data[key] = value
3073
3245
# .client_structure
3074
3246
value["client_structure"] = [
3075
3247
(s.decode("utf-8")
3076
3248
if isinstance(s, bytes)
3077
3249
else s) for s in
3078
value["client_structure"] ]
3250
value["client_structure"]]
3079
3251
# .name & .host
3080
3252
for k in ("name", "host"):
3081
3253
if isinstance(value[k], bytes):
3082
3254
value[k] = value[k].decode("utf-8")
3083
## old_client_settings
3255
if "key_id" not in value:
3256
value["key_id"] = ""
3257
elif "fingerprint" not in value:
3258
value["fingerprint"] = ""
3259
# old_client_settings
3084
3260
# .keys()
3085
3261
old_client_settings = {
3086
3262
(key.decode("utf-8")
3087
3263
if isinstance(key, bytes)
3088
3264
else key): value
3089
3265
for key, value in
3090
bytes_old_client_settings.items() }
3266
bytes_old_client_settings.items()}
3091
3267
del bytes_old_client_settings
3092
3268
# .host
3093
3269
for value in old_client_settings.values():
3107
3283
logger.warning("Could not load persistent state: "
3108
3284
"EOFError:",
3109
3285
exc_info=e)
3110
3286
3111
3287
with PGPEngine() as pgp:
3112
3288
for client_name, client in clients_data.items():
3113
3289
# Skip removed clients
3114
3290
if client_name not in client_settings:
3115
3291
continue
3116
3292
3117
3293
# Decide which value to use after restoring saved state.
3118
3294
# We have three different values: Old config file,
3119
3295
# new config file, and saved state.
3130
3306
client[name] = value
3131
3307
except KeyError:
3132
3308
pass
3133
3309
3134
3310
# Clients who has passed its expire date can still be
3135
3311
# enabled if its last checker was successful. A Client
3136
3312
# whose checker succeeded before we stored its state is
3169
3345
client_name))
3170
3346
client["secret"] = (client_settings[client_name]
3171
3347
["secret"])
3172
3348
3173
3349
# Add/remove clients based on new changes made to config
3174
3350
for client_name in (set(old_client_settings)
3175
3351
- set(client_settings)):
3177
3353
for client_name in (set(client_settings)
3178
3354
- set(old_client_settings)):
3179
3355
clients_data[client_name] = client_settings[client_name]
3180
3356
3181
3357
# Create all client objects
3182
3358
for client_name, client in clients_data.items():
3183
3359
tcp_server.clients[client_name] = client_class(
3184
name = client_name,
3185
settings = client,
3186
server_settings = server_settings)
3187
3360
name=client_name,
3361
settings=client,
3362
server_settings=server_settings)
3363
3188
3364
if not tcp_server.clients:
3189
3365
logger.warning("No clients defined")
3190
3366
3191
3367
if not foreground:
3192
3368
if pidfile is not None:
3193
3369
pid = os.getpid()
3199
3375
pidfilename, pid)
3200
3376
del pidfile
3201
3377
del pidfilename
3202
3378
3203
3379
for termsig in (signal.SIGHUP, signal.SIGTERM):
3204
3380
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3205
3381
lambda: main_loop.quit() and False)
3206
3382
3207
3383
if use_dbus:
3208
3384
3209
3385
@alternate_dbus_interfaces(
3210
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
3386
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3211
3387
class MandosDBusService(DBusObjectWithObjectManager):
3212
3388
"""A D-Bus proxy object"""
3213
3389
3214
3390
def __init__(self):
3215
3391
dbus.service.Object.__init__(self, bus, "/")
3216
3392
3217
3393
_interface = "se.recompile.Mandos"
3218
3394
3219
3395
@dbus.service.signal(_interface, signature="o")
3220
3396
def ClientAdded(self, objpath):
3221
3397
"D-Bus signal"
3222
3398
pass
3223
3399
3224
3400
@dbus.service.signal(_interface, signature="ss")
3225
def ClientNotFound(self, fingerprint, address):
3401
def ClientNotFound(self, key_id, address):
3226
3402
"D-Bus signal"
3227
3403
pass
3228
3404
3229
3405
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3230
3406
"true"})
3231
3407
@dbus.service.signal(_interface, signature="os")
3232
3408
def ClientRemoved(self, objpath, name):
3233
3409
"D-Bus signal"
3234
3410
pass
3235
3411
3236
3412
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3237
3413
"true"})
3238
3414
@dbus.service.method(_interface, out_signature="ao")
3240
3416
"D-Bus method"
3241
3417
return dbus.Array(c.dbus_object_path for c in
3242
3418
tcp_server.clients.values())
3243
3419
3244
3420
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3245
3421
"true"})
3246
3422
@dbus.service.method(_interface,
3248
3424
def GetAllClientsWithProperties(self):
3249
3425
"D-Bus method"
3250
3426
return dbus.Dictionary(
3251
{ c.dbus_object_path: c.GetAll(
3427
{c.dbus_object_path: c.GetAll(
3252
3428
"se.recompile.Mandos.Client")
3253
for c in tcp_server.clients.values() },
3429
for c in tcp_server.clients.values()},
3254
3430
signature="oa{sv}")
3255
3431
3256
3432
@dbus.service.method(_interface, in_signature="o")
3257
3433
def RemoveClient(self, object_path):
3258
3434
"D-Bus method"
3266
3442
self.client_removed_signal(c)
3267
3443
return
3268
3444
raise KeyError(object_path)
3269
3445
3270
3446
del _interface
3271
3447
3272
3448
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3273
out_signature = "a{oa{sa{sv}}}")
3449
out_signature="a{oa{sa{sv}}}")
3274
3450
def GetManagedObjects(self):
3275
3451
"""D-Bus method"""
3276
3452
return dbus.Dictionary(
3277
{ client.dbus_object_path:
3278
dbus.Dictionary(
3279
{ interface: client.GetAll(interface)
3280
for interface in
3281
client._get_all_interface_names()})
3282
for client in tcp_server.clients.values()})
3283
3453
{client.dbus_object_path:
3454
dbus.Dictionary(
3455
{interface: client.GetAll(interface)
3456
for interface in
3457
client._get_all_interface_names()})
3458
for client in tcp_server.clients.values()})
3459
3284
3460
def client_added_signal(self, client):
3285
3461
"""Send the new standard signal and the old signal"""
3286
3462
if use_dbus:
3288
3464
self.InterfacesAdded(
3289
3465
client.dbus_object_path,
3290
3466
dbus.Dictionary(
3291
{ interface: client.GetAll(interface)
3292
for interface in
3293
client._get_all_interface_names()}))
3467
{interface: client.GetAll(interface)
3468
for interface in
3469
client._get_all_interface_names()}))
3294
3470
# Old signal
3295
3471
self.ClientAdded(client.dbus_object_path)
3296
3472
3297
3473
def client_removed_signal(self, client):
3298
3474
"""Send the new standard signal and the old signal"""
3299
3475
if use_dbus:
3304
3480
# Old signal
3305
3481
self.ClientRemoved(client.dbus_object_path,
3306
3482
client.name)
3307
3483
3308
3484
mandos_dbus_service = MandosDBusService()
3309
3485
3486
# Save modules to variables to exempt the modules from being
3487
# unloaded before the function registered with atexit() is run.
3488
mp = multiprocessing
3489
wn = wnull
3490
3310
3491
def cleanup():
3311
3492
"Cleanup function; run on exit"
3312
3493
if zeroconf:
3313
3494
service.cleanup()
3314
3315
multiprocessing.active_children()
3316
wnull.close()
3495
3496
mp.active_children()
3497
wn.close()
3317
3498
if not (tcp_server.clients or client_settings):
3318
3499
return
3319
3500
3320
3501
# Store client before exiting. Secrets are encrypted with key
3321
3502
# based on what config file has. If config file is
3322
3503
# removed/edited, old secret will thus be unrecovable.
3327
3508
client.encrypted_secret = pgp.encrypt(client.secret,
3328
3509
key)
3329
3510
client_dict = {}
3330
3511
3331
3512
# A list of attributes that can not be pickled
3332
3513
# + secret.
3333
exclude = { "bus", "changedstate", "secret",
3334
"checker", "server_settings" }
3514
exclude = {"bus", "changedstate", "secret",
3515
"checker", "server_settings"}
3335
3516
for name, typ in inspect.getmembers(dbus.service
3336
3517
.Object):
3337
3518
exclude.add(name)
3338
3519
3339
3520
client_dict["encrypted_secret"] = (client
3340
3521
.encrypted_secret)
3341
3522
for attr in client.client_structure:
3342
3523
if attr not in exclude:
3343
3524
client_dict[attr] = getattr(client, attr)
3344
3525
3345
3526
clients[client.name] = client_dict
3346
3527
del client_settings[client.name]["secret"]
3347
3528
3348
3529
try:
3349
3530
with tempfile.NamedTemporaryFile(
3350
3531
mode='wb',
3353
3534
dir=os.path.dirname(stored_state_path),
3354
3535
delete=False) as stored_state:
3355
3536
pickle.dump((clients, client_settings), stored_state,
3356
protocol = 2)
3537
protocol=2)
3357
3538
tempname = stored_state.name
3358
3539
os.rename(tempname, stored_state_path)
3359
3540
except (IOError, OSError) as e:
3369
3550
logger.warning("Could not save persistent state:",
3370
3551
exc_info=e)
3371
3552
raise
3372
3553
3373
3554
# Delete all clients, and settings from config
3374
3555
while tcp_server.clients:
3375
3556
name, client = tcp_server.clients.popitem()
3381
3562
if use_dbus:
3382
3563
mandos_dbus_service.client_removed_signal(client)
3383
3564
client_settings.clear()
3384
3565
3385
3566
atexit.register(cleanup)
3386
3567
3387
3568
for client in tcp_server.clients.values():
3388
3569
if use_dbus:
3389
3570
# Emit D-Bus signal for adding
3391
3572
# Need to initiate checking of clients
3392
3573
if client.enabled:
3393
3574
client.init_checker()
3394
3575
3395
3576
tcp_server.enable()
3396
3577
tcp_server.server_activate()
3397
3578
3398
3579
# Find out what port we got
3399
3580
if zeroconf:
3400
3581
service.port = tcp_server.socket.getsockname()[1]
3405
3586
else: # IPv4
3406
3587
logger.info("Now listening on address %r, port %d",
3407
3588
*tcp_server.socket.getsockname())
3408
3409
#service.interface = tcp_server.socket.getsockname()[3]
3410
3589
3590
# service.interface = tcp_server.socket.getsockname()[3]
3591
3411
3592
try:
3412
3593
if zeroconf:
3413
3594
# From the Avahi example code
3418
3599
cleanup()
3419
3600
sys.exit(1)
3420
3601
# End of Avahi example code
3421
3602
3422
3603
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3423
3604
lambda *args, **kwargs:
3424
3605
(tcp_server.handle_request
3425
3606
(*args[2:], **kwargs) or True))
3426
3607
3427
3608
logger.debug("Starting main loop")
3428
3609
main_loop.run()
3429
3610
except AvahiError as error:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0