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- Committer: Teddy Hogeborn
- Date: 2018-08-19 14:58:40 UTC
- Revision ID: teddy@recompile.se-20180819145840-s1a3xar41lyoq4ty
Set executable permissions on new files
* initramfs-tools-script-stop: Did "chmod +x".
* mandos-to-cryptroot-unlock: - '' -
* initramfs-tools-script-stop: Did "chmod +x".
* mandos-to-cryptroot-unlock: - '' -
- files added:
- initramfs-tools-conf
- files removed:
- initramfs-tools-hook-conf
- files modified:
- DBUS-API
added
removed
mandos
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#!/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 © 2008-2018 Teddy Hogeborn
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# Copyright © 2008-2018 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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if sys.version_info.major == 2:
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str = unicode
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version = "1.7.10"
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version = "1.7.19"
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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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class PGPEngine(object):
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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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# 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.
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It is instantiated once, and simulates having an Avahi module."""
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IF_UNSPEC = -1 # avahi-common/address.h
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PROTO_UNSPEC = -1 # avahi-common/address.h
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PROTO_INET = 0 # avahi-common/address.h
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PROTO_INET6 = 1 # avahi-common/address.h
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IF_UNSPEC = -1 # avahi-common/address.h
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PROTO_UNSPEC = -1 # avahi-common/address.h
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PROTO_INET = 0 # avahi-common/address.h
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PROTO_INET6 = 1 # avahi-common/address.h
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DBUS_NAME = "org.freedesktop.Avahi"
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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
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DBUS_PATH_SERVER = "/"
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def string_array_to_txt_array(self, t):
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return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
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for s in t), signature="ay")
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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
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SERVER_INVALID = 0 # avahi-common/defs.h
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SERVER_REGISTERING = 1 # avahi-common/defs.h
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SERVER_RUNNING = 2 # avahi-common/defs.h
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SERVER_COLLISION = 3 # avahi-common/defs.h
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SERVER_FAILURE = 4 # avahi-common/defs.h
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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()
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class AvahiError(Exception):
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def __init__(self, value, *args, **kwargs):
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self.value = value
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class AvahiService(object):
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"""An Avahi (Zeroconf) service.
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Attributes:
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interface: integer; avahi.IF_UNSPEC or an interface index.
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Used to optionally bind to the specified interface.
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server: D-Bus Server
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bus: dbus.SystemBus()
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"""
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def __init__(self,
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interface = avahi.IF_UNSPEC,
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name = None,
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servicetype = None,
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port = None,
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TXT = None,
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domain = "",
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host = "",
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max_renames = 32768,
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protocol = avahi.PROTO_UNSPEC,
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bus = None):
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interface=avahi.IF_UNSPEC,
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name=None,
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servicetype=None,
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port=None,
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TXT=None,
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domain="",
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host="",
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max_renames=32768,
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protocol=avahi.PROTO_UNSPEC,
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bus=None):
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self.interface = interface
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self.name = name
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self.type = servicetype
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self.server = None
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self.bus = bus
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self.entry_group_state_changed_match = None
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def rename(self, remove=True):
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"""Derived from the Avahi example code"""
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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)
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def remove(self):
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"""Derived from the Avahi example code"""
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if self.entry_group_state_changed_match is not None:
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self.entry_group_state_changed_match = None
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if self.group is not None:
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self.group.Reset()
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def add(self):
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"""Derived from the Avahi example code"""
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self.remove()
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dbus.UInt16(self.port),
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avahi.string_array_to_txt_array(self.TXT))
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self.group.Commit()
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def entry_group_state_changed(self, state, error):
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"""Derived from the Avahi example code"""
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logger.debug("Avahi entry group state change: %i", state)
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if state == avahi.ENTRY_GROUP_ESTABLISHED:
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logger.debug("Zeroconf service established.")
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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))
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raise AvahiGroupError("State changed: {!s}".format(error))
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def cleanup(self):
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"""Derived from the Avahi example code"""
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if self.group is not None:
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pass
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self.group = None
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self.remove()
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def server_state_changed(self, state, error=None):
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"""Derived from the Avahi example code"""
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logger.debug("Avahi server state change: %i", state)
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logger.debug("Unknown state: %r", state)
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else:
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logger.debug("Unknown state: %r: %r", state, error)
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def activate(self):
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"""Derived from the Avahi example code"""
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if self.server is None:
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class AvahiServiceToSyslog(AvahiService):
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def rename(self, *args, **kwargs):
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"""Add the new name to the syslog messages"""
495
ret = AvahiService.rename(self, *args, **kwargs)
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ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
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syslogger.setFormatter(logging.Formatter(
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'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
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.format(self.name)))
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return ret
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# Pretend that we have a GnuTLS module
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class GnuTLS(object):
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"""This isn't so much a class as it is a module-like namespace.
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It is instantiated once, and simulates having a GnuTLS module."""
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_library = ctypes.cdll.LoadLibrary(
507
ctypes.util.find_library("gnutls"))
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library = ctypes.util.find_library("gnutls")
512
if library is None:
513
library = ctypes.util.find_library("gnutls-deb0")
514
_library = ctypes.cdll.LoadLibrary(library)
515
del library
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_need_version = b"3.3.0"
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509
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def __init__(self):
510
# Need to use class name "GnuTLS" here, since this method is
511
# called before the assignment to the "gnutls" global variable
512
# happens.
513
if GnuTLS.check_version(self._need_version) is None:
514
raise GnuTLS.Error("Needs GnuTLS {} or later"
515
.format(self._need_version))
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# Need to use "self" here, since this method is called before
520
# the assignment to the "gnutls" global variable happens.
521
if self.check_version(self._need_version) is None:
522
raise self.Error("Needs GnuTLS {} or later"
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.format(self._need_version))
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# Unless otherwise indicated, the constants and types below are
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# all from the gnutls/gnutls.h C header file.
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# Constants
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E_SUCCESS = 0
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E_INTERRUPTED = -52
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CRD_CERTIFICATE = 1
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E_NO_CERTIFICATE_FOUND = -49
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OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
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# Types
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class session_int(ctypes.Structure):
533
541
_fields_ = []
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session_t = ctypes.POINTER(session_int)
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535
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class certificate_credentials_st(ctypes.Structure):
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_fields_ = []
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certificate_credentials_t = ctypes.POINTER(
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certificate_credentials_st)
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certificate_type_t = ctypes.c_int
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540
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class datum_t(ctypes.Structure):
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_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
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('size', ctypes.c_uint)]
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543
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class openpgp_crt_int(ctypes.Structure):
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_fields_ = []
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openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
546
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
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openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
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log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
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credentials_type_t = ctypes.c_int
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transport_ptr_t = ctypes.c_void_p
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561
close_request_t = ctypes.c_int
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562
552
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# Exceptions
553
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class Error(Exception):
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# We need to use the class name "GnuTLS" here, since this
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# exception might be raised from within GnuTLS.__init__,
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# which is called before the assignment to the "gnutls"
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# global variable has happened.
558
def __init__(self, message = None, code = None, args=()):
569
def __init__(self, message=None, code=None, args=()):
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# Default usage is by a message string, but if a return
560
571
# code is passed, convert it to a string with
561
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# gnutls.strerror()
564
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message = GnuTLS.strerror(code)
565
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return super(GnuTLS.Error, self).__init__(
566
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message, *args)
567
578
568
579
class CertificateSecurityError(Error):
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pass
570
581
571
582
# Classes
572
583
class Credentials(object):
573
584
def __init__(self):
575
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gnutls.certificate_allocate_credentials(
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ctypes.byref(self._c_object))
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self.type = gnutls.CRD_CERTIFICATE
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589
579
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def __del__(self):
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gnutls.certificate_free_credentials(self._c_object)
581
592
582
593
class ClientSession(object):
583
def __init__(self, socket, credentials = None):
594
def __init__(self, socket, credentials=None):
584
595
self._c_object = gnutls.session_t()
585
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gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
586
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gnutls.set_default_priority(self._c_object)
594
605
ctypes.cast(credentials._c_object,
595
606
ctypes.c_void_p))
596
607
self.credentials = credentials
597
608
598
609
def __del__(self):
599
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gnutls.deinit(self._c_object)
600
611
601
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def handshake(self):
602
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return gnutls.handshake(self._c_object)
603
614
604
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def send(self, data):
605
616
data = bytes(data)
606
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data_len = len(data)
608
619
data_len -= gnutls.record_send(self._c_object,
609
620
data[-data_len:],
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621
data_len)
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622
612
623
def bye(self):
613
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return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
614
625
615
626
# Error handling functions
616
627
def _error_code(result):
617
628
"""A function to raise exceptions on errors, suitable
619
630
if result >= 0:
620
631
return result
621
632
if result == gnutls.E_NO_CERTIFICATE_FOUND:
622
raise gnutls.CertificateSecurityError(code = result)
623
raise gnutls.Error(code = result)
624
633
raise gnutls.CertificateSecurityError(code=result)
634
raise gnutls.Error(code=result)
635
625
636
def _retry_on_error(result, func, arguments):
626
637
"""A function to retry on some errors, suitable
627
638
for the 'errcheck' attribute on ctypes functions"""
630
641
return _error_code(result)
631
642
result = func(*arguments)
632
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return result
633
644
634
645
# Unless otherwise indicated, the function declarations below are
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# all from the gnutls/gnutls.h C header file.
636
647
637
648
# Functions
638
649
priority_set_direct = _library.gnutls_priority_set_direct
639
650
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
640
651
ctypes.POINTER(ctypes.c_char_p)]
641
652
priority_set_direct.restype = _error_code
642
653
643
654
init = _library.gnutls_init
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655
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
645
656
init.restype = _error_code
646
657
647
658
set_default_priority = _library.gnutls_set_default_priority
648
659
set_default_priority.argtypes = [session_t]
649
660
set_default_priority.restype = _error_code
650
661
651
662
record_send = _library.gnutls_record_send
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record_send.argtypes = [session_t, ctypes.c_void_p,
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664
ctypes.c_size_t]
654
665
record_send.restype = ctypes.c_ssize_t
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666
record_send.errcheck = _retry_on_error
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667
657
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certificate_allocate_credentials = (
658
669
_library.gnutls_certificate_allocate_credentials)
659
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certificate_allocate_credentials.argtypes = [
660
671
ctypes.POINTER(certificate_credentials_t)]
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672
certificate_allocate_credentials.restype = _error_code
662
673
663
674
certificate_free_credentials = (
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675
_library.gnutls_certificate_free_credentials)
665
certificate_free_credentials.argtypes = [certificate_credentials_t]
676
certificate_free_credentials.argtypes = [
677
certificate_credentials_t]
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678
certificate_free_credentials.restype = None
667
679
668
680
handshake_set_private_extensions = (
669
681
_library.gnutls_handshake_set_private_extensions)
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handshake_set_private_extensions.argtypes = [session_t,
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683
ctypes.c_int]
672
684
handshake_set_private_extensions.restype = None
673
685
674
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credentials_set = _library.gnutls_credentials_set
675
687
credentials_set.argtypes = [session_t, credentials_type_t,
676
688
ctypes.c_void_p]
677
689
credentials_set.restype = _error_code
678
690
679
691
strerror = _library.gnutls_strerror
680
692
strerror.argtypes = [ctypes.c_int]
681
693
strerror.restype = ctypes.c_char_p
682
694
683
695
certificate_type_get = _library.gnutls_certificate_type_get
684
696
certificate_type_get.argtypes = [session_t]
685
697
certificate_type_get.restype = _error_code
686
698
687
699
certificate_get_peers = _library.gnutls_certificate_get_peers
688
700
certificate_get_peers.argtypes = [session_t,
689
701
ctypes.POINTER(ctypes.c_uint)]
690
702
certificate_get_peers.restype = ctypes.POINTER(datum_t)
691
703
692
704
global_set_log_level = _library.gnutls_global_set_log_level
693
705
global_set_log_level.argtypes = [ctypes.c_int]
694
706
global_set_log_level.restype = None
695
707
696
708
global_set_log_function = _library.gnutls_global_set_log_function
697
709
global_set_log_function.argtypes = [log_func]
698
710
global_set_log_function.restype = None
699
711
700
712
deinit = _library.gnutls_deinit
701
713
deinit.argtypes = [session_t]
702
714
deinit.restype = None
703
715
704
716
handshake = _library.gnutls_handshake
705
717
handshake.argtypes = [session_t]
706
718
handshake.restype = _error_code
707
719
handshake.errcheck = _retry_on_error
708
720
709
721
transport_set_ptr = _library.gnutls_transport_set_ptr
710
722
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
711
723
transport_set_ptr.restype = None
712
724
713
725
bye = _library.gnutls_bye
714
726
bye.argtypes = [session_t, close_request_t]
715
727
bye.restype = _error_code
716
728
bye.errcheck = _retry_on_error
717
729
718
730
check_version = _library.gnutls_check_version
719
731
check_version.argtypes = [ctypes.c_char_p]
720
732
check_version.restype = ctypes.c_char_p
721
733
722
734
# All the function declarations below are from gnutls/openpgp.h
723
735
724
736
openpgp_crt_init = _library.gnutls_openpgp_crt_init
725
737
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
726
738
openpgp_crt_init.restype = _error_code
727
739
728
740
openpgp_crt_import = _library.gnutls_openpgp_crt_import
729
741
openpgp_crt_import.argtypes = [openpgp_crt_t,
730
742
ctypes.POINTER(datum_t),
731
743
openpgp_crt_fmt_t]
732
744
openpgp_crt_import.restype = _error_code
733
745
734
746
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
735
747
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
736
748
ctypes.POINTER(ctypes.c_uint)]
737
749
openpgp_crt_verify_self.restype = _error_code
738
750
739
751
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
740
752
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
741
753
openpgp_crt_deinit.restype = None
742
754
743
755
openpgp_crt_get_fingerprint = (
744
756
_library.gnutls_openpgp_crt_get_fingerprint)
745
757
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
747
759
ctypes.POINTER(
748
760
ctypes.c_size_t)]
749
761
openpgp_crt_get_fingerprint.restype = _error_code
750
762
751
763
# Remove non-public functions
752
764
del _error_code, _retry_on_error
753
765
# Create the global "gnutls" object, simulating a module
754
766
gnutls = GnuTLS()
755
767
768
756
769
def call_pipe(connection, # : multiprocessing.Connection
757
770
func, *args, **kwargs):
758
771
"""This function is meant to be called by multiprocessing.Process
759
772
760
773
This function runs func(*args, **kwargs), and writes the resulting
761
774
return value on the provided multiprocessing.Connection.
762
775
"""
763
776
connection.send(func(*args, **kwargs))
764
777
connection.close()
765
778
779
766
780
class Client(object):
767
781
"""A representation of a client host served by this server.
768
782
769
783
Attributes:
770
784
approved: bool(); 'None' if not yet approved/disapproved
771
785
approval_delay: datetime.timedelta(); Time to wait for approval
808
822
disabled, or None
809
823
server_settings: The server_settings dict from main()
810
824
"""
811
825
812
826
runtime_expansions = ("approval_delay", "approval_duration",
813
827
"created", "enabled", "expires",
814
828
"fingerprint", "host", "interval",
825
839
"approved_by_default": "True",
826
840
"enabled": "True",
827
841
}
828
842
829
843
@staticmethod
830
844
def config_parser(config):
831
845
"""Construct a new dict of client settings of this form:
838
852
for client_name in config.sections():
839
853
section = dict(config.items(client_name))
840
854
client = settings[client_name] = {}
841
855
842
856
client["host"] = section["host"]
843
857
# Reformat values from string types to Python types
844
858
client["approved_by_default"] = config.getboolean(
845
859
client_name, "approved_by_default")
846
860
client["enabled"] = config.getboolean(client_name,
847
861
"enabled")
848
862
849
863
# Uppercase and remove spaces from fingerprint for later
850
864
# comparison purposes with return value from the
851
865
# fingerprint() function
875
889
client["last_approval_request"] = None
876
890
client["last_checked_ok"] = None
877
891
client["last_checker_status"] = -2
878
892
879
893
return settings
880
881
def __init__(self, settings, name = None, server_settings=None):
894
895
def __init__(self, settings, name=None, server_settings=None):
882
896
self.name = name
883
897
if server_settings is None:
884
898
server_settings = {}
886
900
# adding all client settings
887
901
for setting, value in settings.items():
888
902
setattr(self, setting, value)
889
903
890
904
if self.enabled:
891
905
if not hasattr(self, "last_enabled"):
892
906
self.last_enabled = datetime.datetime.utcnow()
896
910
else:
897
911
self.last_enabled = None
898
912
self.expires = None
899
913
900
914
logger.debug("Creating client %r", self.name)
901
915
logger.debug(" Fingerprint: %s", self.fingerprint)
902
916
self.created = settings.get("created",
903
917
datetime.datetime.utcnow())
904
918
905
919
# attributes specific for this server instance
906
920
self.checker = None
907
921
self.checker_initiator_tag = None
916
930
for attr in self.__dict__.keys()
917
931
if not attr.startswith("_")]
918
932
self.client_structure.append("client_structure")
919
933
920
934
for name, t in inspect.getmembers(
921
935
type(self), lambda obj: isinstance(obj, property)):
922
936
if not name.startswith("_"):
923
937
self.client_structure.append(name)
924
938
925
939
# Send notice to process children that client state has changed
926
940
def send_changedstate(self):
927
941
with self.changedstate:
928
942
self.changedstate.notify_all()
929
943
930
944
def enable(self):
931
945
"""Start this client's checker and timeout hooks"""
932
946
if getattr(self, "enabled", False):
937
951
self.last_enabled = datetime.datetime.utcnow()
938
952
self.init_checker()
939
953
self.send_changedstate()
940
954
941
955
def disable(self, quiet=True):
942
956
"""Disable this client."""
943
957
if not getattr(self, "enabled", False):
957
971
self.send_changedstate()
958
972
# Do not run this again if called by a GLib.timeout_add
959
973
return False
960
974
961
975
def __del__(self):
962
976
self.disable()
963
977
964
978
def init_checker(self):
965
979
# Schedule a new checker to be started an 'interval' from now,
966
980
# and every interval from then on.
976
990
int(self.timeout.total_seconds() * 1000), self.disable)
977
991
# Also start a new checker *right now*.
978
992
self.start_checker()
979
993
980
994
def checker_callback(self, source, condition, connection,
981
995
command):
982
996
"""The checker has completed, so take appropriate actions."""
985
999
# Read return code from connection (see call_pipe)
986
1000
returncode = connection.recv()
987
1001
connection.close()
988
1002
989
1003
if returncode >= 0:
990
1004
self.last_checker_status = returncode
991
1005
self.last_checker_signal = None
1001
1015
logger.warning("Checker for %(name)s crashed?",
1002
1016
vars(self))
1003
1017
return False
1004
1018
1005
1019
def checked_ok(self):
1006
1020
"""Assert that the client has been seen, alive and well."""
1007
1021
self.last_checked_ok = datetime.datetime.utcnow()
1008
1022
self.last_checker_status = 0
1009
1023
self.last_checker_signal = None
1010
1024
self.bump_timeout()
1011
1025
1012
1026
def bump_timeout(self, timeout=None):
1013
1027
"""Bump up the timeout for this client."""
1014
1028
if timeout is None:
1020
1034
self.disable_initiator_tag = GLib.timeout_add(
1021
1035
int(timeout.total_seconds() * 1000), self.disable)
1022
1036
self.expires = datetime.datetime.utcnow() + timeout
1023
1037
1024
1038
def need_approval(self):
1025
1039
self.last_approval_request = datetime.datetime.utcnow()
1026
1040
1027
1041
def start_checker(self):
1028
1042
"""Start a new checker subprocess if one is not running.
1029
1043
1030
1044
If a checker already exists, leave it running and do
1031
1045
nothing."""
1032
1046
# The reason for not killing a running checker is that if we
1037
1051
# checkers alone, the checker would have to take more time
1038
1052
# than 'timeout' for the client to be disabled, which is as it
1039
1053
# should be.
1040
1054
1041
1055
if self.checker is not None and not self.checker.is_alive():
1042
1056
logger.warning("Checker was not alive; joining")
1043
1057
self.checker.join()
1047
1061
# Escape attributes for the shell
1048
1062
escaped_attrs = {
1049
1063
attr: re.escape(str(getattr(self, attr)))
1050
for attr in self.runtime_expansions }
1064
for attr in self.runtime_expansions}
1051
1065
try:
1052
1066
command = self.checker_command % escaped_attrs
1053
1067
except TypeError as error:
1065
1079
# The exception is when not debugging but nevertheless
1066
1080
# running in the foreground; use the previously
1067
1081
# created wnull.
1068
popen_args = { "close_fds": True,
1069
"shell": True,
1070
"cwd": "/" }
1082
popen_args = {"close_fds": True,
1083
"shell": True,
1084
"cwd": "/"}
1071
1085
if (not self.server_settings["debug"]
1072
1086
and self.server_settings["foreground"]):
1073
1087
popen_args.update({"stdout": wnull,
1074
"stderr": wnull })
1075
pipe = multiprocessing.Pipe(duplex = False)
1088
"stderr": wnull})
1089
pipe = multiprocessing.Pipe(duplex=False)
1076
1090
self.checker = multiprocessing.Process(
1077
target = call_pipe,
1078
args = (pipe[1], subprocess.call, command),
1079
kwargs = popen_args)
1091
target=call_pipe,
1092
args=(pipe[1], subprocess.call, command),
1093
kwargs=popen_args)
1080
1094
self.checker.start()
1081
1095
self.checker_callback_tag = GLib.io_add_watch(
1082
1096
pipe[0].fileno(), GLib.IO_IN,
1083
1097
self.checker_callback, pipe[0], command)
1084
1098
# Re-run this periodically if run by GLib.timeout_add
1085
1099
return True
1086
1100
1087
1101
def stop_checker(self):
1088
1102
"""Force the checker process, if any, to stop."""
1089
1103
if self.checker_callback_tag:
1102
1116
byte_arrays=False):
1103
1117
"""Decorators for marking methods of a DBusObjectWithProperties to
1104
1118
become properties on the D-Bus.
1105
1119
1106
1120
The decorated method will be called with no arguments by "Get"
1107
1121
and with one argument by "Set".
1108
1122
1109
1123
The parameters, where they are supported, are the same as
1110
1124
dbus.service.method, except there is only "signature", since the
1111
1125
type from Get() and the type sent to Set() is the same.
1115
1129
if byte_arrays and signature != "ay":
1116
1130
raise ValueError("Byte arrays not supported for non-'ay'"
1117
1131
" signature {!r}".format(signature))
1118
1132
1119
1133
def decorator(func):
1120
1134
func._dbus_is_property = True
1121
1135
func._dbus_interface = dbus_interface
1124
1138
func._dbus_name = func.__name__
1125
1139
if func._dbus_name.endswith("_dbus_property"):
1126
1140
func._dbus_name = func._dbus_name[:-14]
1127
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
1141
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1128
1142
return func
1129
1143
1130
1144
return decorator
1131
1145
1132
1146
1133
1147
def dbus_interface_annotations(dbus_interface):
1134
1148
"""Decorator for marking functions returning interface annotations
1135
1149
1136
1150
Usage:
1137
1151
1138
1152
@dbus_interface_annotations("org.example.Interface")
1139
1153
def _foo(self): # Function name does not matter
1140
1154
return {"org.freedesktop.DBus.Deprecated": "true",
1141
1155
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1142
1156
"false"}
1143
1157
"""
1144
1158
1145
1159
def decorator(func):
1146
1160
func._dbus_is_interface = True
1147
1161
func._dbus_interface = dbus_interface
1148
1162
func._dbus_name = dbus_interface
1149
1163
return func
1150
1164
1151
1165
return decorator
1152
1166
1153
1167
1154
1168
def dbus_annotations(annotations):
1155
1169
"""Decorator to annotate D-Bus methods, signals or properties
1156
1170
Usage:
1157
1171
1158
1172
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1159
1173
"org.freedesktop.DBus.Property."
1160
1174
"EmitsChangedSignal": "false"})
1162
1176
access="r")
1163
1177
def Property_dbus_property(self):
1164
1178
return dbus.Boolean(False)
1165
1179
1166
1180
See also the DBusObjectWithAnnotations class.
1167
1181
"""
1168
1182
1169
1183
def decorator(func):
1170
1184
func._dbus_annotations = annotations
1171
1185
return func
1172
1186
1173
1187
return decorator
1174
1188
1175
1189
1193
1207
1194
1208
class DBusObjectWithAnnotations(dbus.service.Object):
1195
1209
"""A D-Bus object with annotations.
1196
1210
1197
1211
Classes inheriting from this can use the dbus_annotations
1198
1212
decorator to add annotations to methods or signals.
1199
1213
"""
1200
1214
1201
1215
@staticmethod
1202
1216
def _is_dbus_thing(thing):
1203
1217
"""Returns a function testing if an attribute is a D-Bus thing
1204
1218
1205
1219
If called like _is_dbus_thing("method") it returns a function
1206
1220
suitable for use as predicate to inspect.getmembers().
1207
1221
"""
1208
1222
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1209
1223
False)
1210
1224
1211
1225
def _get_all_dbus_things(self, thing):
1212
1226
"""Returns a generator of (name, attribute) pairs
1213
1227
"""
1216
1230
for cls in self.__class__.__mro__
1217
1231
for name, athing in
1218
1232
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1219
1233
1220
1234
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1221
out_signature = "s",
1222
path_keyword = 'object_path',
1223
connection_keyword = 'connection')
1235
out_signature="s",
1236
path_keyword='object_path',
1237
connection_keyword='connection')
1224
1238
def Introspect(self, object_path, connection):
1225
1239
"""Overloading of standard D-Bus method.
1226
1240
1227
1241
Inserts annotation tags on methods and signals.
1228
1242
"""
1229
1243
xmlstring = dbus.service.Object.Introspect(self, object_path,
1230
1244
connection)
1231
1245
try:
1232
1246
document = xml.dom.minidom.parseString(xmlstring)
1233
1247
1234
1248
for if_tag in document.getElementsByTagName("interface"):
1235
1249
# Add annotation tags
1236
1250
for typ in ("method", "signal"):
1263
1277
if_tag.appendChild(ann_tag)
1264
1278
# Fix argument name for the Introspect method itself
1265
1279
if (if_tag.getAttribute("name")
1266
== dbus.INTROSPECTABLE_IFACE):
1280
== dbus.INTROSPECTABLE_IFACE):
1267
1281
for cn in if_tag.getElementsByTagName("method"):
1268
1282
if cn.getAttribute("name") == "Introspect":
1269
1283
for arg in cn.getElementsByTagName("arg"):
1282
1296
1283
1297
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1284
1298
"""A D-Bus object with properties.
1285
1299
1286
1300
Classes inheriting from this can use the dbus_service_property
1287
1301
decorator to expose methods as D-Bus properties. It exposes the
1288
1302
standard Get(), Set(), and GetAll() methods on the D-Bus.
1289
1303
"""
1290
1304
1291
1305
def _get_dbus_property(self, interface_name, property_name):
1292
1306
"""Returns a bound method if one exists which is a D-Bus
1293
1307
property with the specified name and interface.
1298
1312
if (value._dbus_name == property_name
1299
1313
and value._dbus_interface == interface_name):
1300
1314
return value.__get__(self)
1301
1315
1302
1316
# No such property
1303
1317
raise DBusPropertyNotFound("{}:{}.{}".format(
1304
1318
self.dbus_object_path, interface_name, property_name))
1305
1319
1306
1320
@classmethod
1307
1321
def _get_all_interface_names(cls):
1308
1322
"""Get a sequence of all interfaces supported by an object"""
1311
1325
for x in (inspect.getmro(cls))
1312
1326
for attr in dir(x))
1313
1327
if name is not None)
1314
1328
1315
1329
@dbus.service.method(dbus.PROPERTIES_IFACE,
1316
1330
in_signature="ss",
1317
1331
out_signature="v")
1325
1339
if not hasattr(value, "variant_level"):
1326
1340
return value
1327
1341
return type(value)(value, variant_level=value.variant_level+1)
1328
1342
1329
1343
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1330
1344
def Set(self, interface_name, property_name, value):
1331
1345
"""Standard D-Bus property Set() method, see D-Bus standard.
1343
1357
value = dbus.ByteArray(b''.join(chr(byte)
1344
1358
for byte in value))
1345
1359
prop(value)
1346
1360
1347
1361
@dbus.service.method(dbus.PROPERTIES_IFACE,
1348
1362
in_signature="s",
1349
1363
out_signature="a{sv}")
1350
1364
def GetAll(self, interface_name):
1351
1365
"""Standard D-Bus property GetAll() method, see D-Bus
1352
1366
standard.
1353
1367
1354
1368
Note: Will not include properties with access="write".
1355
1369
"""
1356
1370
properties = {}
1367
1381
properties[name] = value
1368
1382
continue
1369
1383
properties[name] = type(value)(
1370
value, variant_level = value.variant_level + 1)
1384
value, variant_level=value.variant_level + 1)
1371
1385
return dbus.Dictionary(properties, signature="sv")
1372
1386
1373
1387
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1374
1388
def PropertiesChanged(self, interface_name, changed_properties,
1375
1389
invalidated_properties):
1377
1391
standard.
1378
1392
"""
1379
1393
pass
1380
1394
1381
1395
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1382
1396
out_signature="s",
1383
1397
path_keyword='object_path',
1384
1398
connection_keyword='connection')
1385
1399
def Introspect(self, object_path, connection):
1386
1400
"""Overloading of standard D-Bus method.
1387
1401
1388
1402
Inserts property tags and interface annotation tags.
1389
1403
"""
1390
1404
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1392
1406
connection)
1393
1407
try:
1394
1408
document = xml.dom.minidom.parseString(xmlstring)
1395
1409
1396
1410
def make_tag(document, name, prop):
1397
1411
e = document.createElement("property")
1398
1412
e.setAttribute("name", name)
1399
1413
e.setAttribute("type", prop._dbus_signature)
1400
1414
e.setAttribute("access", prop._dbus_access)
1401
1415
return e
1402
1416
1403
1417
for if_tag in document.getElementsByTagName("interface"):
1404
1418
# Add property tags
1405
1419
for tag in (make_tag(document, name, prop)
1447
1461
exc_info=error)
1448
1462
return xmlstring
1449
1463
1464
1450
1465
try:
1451
1466
dbus.OBJECT_MANAGER_IFACE
1452
1467
except AttributeError:
1453
1468
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1454
1469
1470
1455
1471
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1456
1472
"""A D-Bus object with an ObjectManager.
1457
1473
1458
1474
Classes inheriting from this exposes the standard
1459
1475
GetManagedObjects call and the InterfacesAdded and
1460
1476
InterfacesRemoved signals on the standard
1461
1477
"org.freedesktop.DBus.ObjectManager" interface.
1462
1478
1463
1479
Note: No signals are sent automatically; they must be sent
1464
1480
manually.
1465
1481
"""
1466
1482
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1467
out_signature = "a{oa{sa{sv}}}")
1483
out_signature="a{oa{sa{sv}}}")
1468
1484
def GetManagedObjects(self):
1469
1485
"""This function must be overridden"""
1470
1486
raise NotImplementedError()
1471
1487
1472
1488
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1473
signature = "oa{sa{sv}}")
1489
signature="oa{sa{sv}}")
1474
1490
def InterfacesAdded(self, object_path, interfaces_and_properties):
1475
1491
pass
1476
1477
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1492
1493
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1478
1494
def InterfacesRemoved(self, object_path, interfaces):
1479
1495
pass
1480
1496
1481
1497
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1482
out_signature = "s",
1483
path_keyword = 'object_path',
1484
connection_keyword = 'connection')
1498
out_signature="s",
1499
path_keyword='object_path',
1500
connection_keyword='connection')
1485
1501
def Introspect(self, object_path, connection):
1486
1502
"""Overloading of standard D-Bus method.
1487
1503
1488
1504
Override return argument name of GetManagedObjects to be
1489
1505
"objpath_interfaces_and_properties"
1490
1506
"""
1493
1509
connection)
1494
1510
try:
1495
1511
document = xml.dom.minidom.parseString(xmlstring)
1496
1512
1497
1513
for if_tag in document.getElementsByTagName("interface"):
1498
1514
# Fix argument name for the GetManagedObjects method
1499
1515
if (if_tag.getAttribute("name")
1500
== dbus.OBJECT_MANAGER_IFACE):
1516
== dbus.OBJECT_MANAGER_IFACE):
1501
1517
for cn in if_tag.getElementsByTagName("method"):
1502
1518
if (cn.getAttribute("name")
1503
1519
== "GetManagedObjects"):
1513
1529
except (AttributeError, xml.dom.DOMException,
1514
1530
xml.parsers.expat.ExpatError) as error:
1515
1531
logger.error("Failed to override Introspection method",
1516
exc_info = error)
1532
exc_info=error)
1517
1533
return xmlstring
1518
1534
1535
1519
1536
def datetime_to_dbus(dt, variant_level=0):
1520
1537
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1521
1538
if dt is None:
1522
return dbus.String("", variant_level = variant_level)
1539
return dbus.String("", variant_level=variant_level)
1523
1540
return dbus.String(dt.isoformat(), variant_level=variant_level)
1524
1541
1525
1542
1528
1545
dbus.service.Object, it will add alternate D-Bus attributes with
1529
1546
interface names according to the "alt_interface_names" mapping.
1530
1547
Usage:
1531
1548
1532
1549
@alternate_dbus_interfaces({"org.example.Interface":
1533
1550
"net.example.AlternateInterface"})
1534
1551
class SampleDBusObject(dbus.service.Object):
1535
1552
@dbus.service.method("org.example.Interface")
1536
1553
def SampleDBusMethod():
1537
1554
pass
1538
1555
1539
1556
The above "SampleDBusMethod" on "SampleDBusObject" will be
1540
1557
reachable via two interfaces: "org.example.Interface" and
1541
1558
"net.example.AlternateInterface", the latter of which will have
1542
1559
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1543
1560
"true", unless "deprecate" is passed with a False value.
1544
1561
1545
1562
This works for methods and signals, and also for D-Bus properties
1546
1563
(from DBusObjectWithProperties) and interfaces (from the
1547
1564
dbus_interface_annotations decorator).
1548
1565
"""
1549
1566
1550
1567
def wrapper(cls):
1551
1568
for orig_interface_name, alt_interface_name in (
1552
1569
alt_interface_names.items()):
1592
1609
attribute._dbus_annotations)
1593
1610
except AttributeError:
1594
1611
pass
1612
1595
1613
# Define a creator of a function to call both the
1596
1614
# original and alternate functions, so both the
1597
1615
# original and alternate signals gets sent when
1600
1618
"""This function is a scope container to pass
1601
1619
func1 and func2 to the "call_both" function
1602
1620
outside of its arguments"""
1603
1621
1604
1622
@functools.wraps(func2)
1605
1623
def call_both(*args, **kwargs):
1606
1624
"""This function will emit two D-Bus
1607
1625
signals by calling func1 and func2"""
1608
1626
func1(*args, **kwargs)
1609
1627
func2(*args, **kwargs)
1610
# Make wrapper function look like a D-Bus signal
1628
# Make wrapper function look like a D-Bus
1629
# signal
1611
1630
for name, attr in inspect.getmembers(func2):
1612
1631
if name.startswith("_dbus_"):
1613
1632
setattr(call_both, name, attr)
1614
1633
1615
1634
return call_both
1616
1635
# Create the "call_both" function and add it to
1617
1636
# the class
1663
1682
(copy_function(attribute)))
1664
1683
if deprecate:
1665
1684
# Deprecate all alternate interfaces
1666
iname="_AlternateDBusNames_interface_annotation{}"
1685
iname = "_AlternateDBusNames_interface_annotation{}"
1667
1686
for interface_name in interface_names:
1668
1687
1669
1688
@dbus_interface_annotations(interface_name)
1670
1689
def func(self):
1671
return { "org.freedesktop.DBus.Deprecated":
1672
"true" }
1690
return {"org.freedesktop.DBus.Deprecated":
1691
"true"}
1673
1692
# Find an unused name
1674
1693
for aname in (iname.format(i)
1675
1694
for i in itertools.count()):
1686
1705
cls = type("{}Alternate".format(cls.__name__),
1687
1706
(cls, ), attr)
1688
1707
return cls
1689
1708
1690
1709
return wrapper
1691
1710
1692
1711
1694
1713
"se.bsnet.fukt.Mandos"})
1695
1714
class ClientDBus(Client, DBusObjectWithProperties):
1696
1715
"""A Client class using D-Bus
1697
1716
1698
1717
Attributes:
1699
1718
dbus_object_path: dbus.ObjectPath
1700
1719
bus: dbus.SystemBus()
1701
1720
"""
1702
1721
1703
1722
runtime_expansions = (Client.runtime_expansions
1704
1723
+ ("dbus_object_path", ))
1705
1724
1706
1725
_interface = "se.recompile.Mandos.Client"
1707
1726
1708
1727
# dbus.service.Object doesn't use super(), so we can't either.
1709
1710
def __init__(self, bus = None, *args, **kwargs):
1728
1729
def __init__(self, bus=None, *args, **kwargs):
1711
1730
self.bus = bus
1712
1731
Client.__init__(self, *args, **kwargs)
1713
1732
# Only now, when this client is initialized, can it show up on
1719
1738
"/clients/" + client_object_name)
1720
1739
DBusObjectWithProperties.__init__(self, self.bus,
1721
1740
self.dbus_object_path)
1722
1741
1723
1742
def notifychangeproperty(transform_func, dbus_name,
1724
1743
type_func=lambda x: x,
1725
1744
variant_level=1,
1727
1746
_interface=_interface):
1728
1747
""" Modify a variable so that it's a property which announces
1729
1748
its changes to DBus.
1730
1749
1731
1750
transform_fun: Function that takes a value and a variant_level
1732
1751
and transforms it to a D-Bus type.
1733
1752
dbus_name: D-Bus name of the variable
1736
1755
variant_level: D-Bus variant level. Default: 1
1737
1756
"""
1738
1757
attrname = "_{}".format(dbus_name)
1739
1758
1740
1759
def setter(self, value):
1741
1760
if hasattr(self, "dbus_object_path"):
1742
1761
if (not hasattr(self, attrname) or
1749
1768
else:
1750
1769
dbus_value = transform_func(
1751
1770
type_func(value),
1752
variant_level = variant_level)
1771
variant_level=variant_level)
1753
1772
self.PropertyChanged(dbus.String(dbus_name),
1754
1773
dbus_value)
1755
1774
self.PropertiesChanged(
1756
1775
_interface,
1757
dbus.Dictionary({ dbus.String(dbus_name):
1758
dbus_value }),
1776
dbus.Dictionary({dbus.String(dbus_name):
1777
dbus_value}),
1759
1778
dbus.Array())
1760
1779
setattr(self, attrname, value)
1761
1780
1762
1781
return property(lambda self: getattr(self, attrname), setter)
1763
1782
1764
1783
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1765
1784
approvals_pending = notifychangeproperty(dbus.Boolean,
1766
1785
"ApprovalPending",
1767
type_func = bool)
1786
type_func=bool)
1768
1787
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1769
1788
last_enabled = notifychangeproperty(datetime_to_dbus,
1770
1789
"LastEnabled")
1771
1790
checker = notifychangeproperty(
1772
1791
dbus.Boolean, "CheckerRunning",
1773
type_func = lambda checker: checker is not None)
1792
type_func=lambda checker: checker is not None)
1774
1793
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1775
1794
"LastCheckedOK")
1776
1795
last_checker_status = notifychangeproperty(dbus.Int16,
1781
1800
"ApprovedByDefault")
1782
1801
approval_delay = notifychangeproperty(
1783
1802
dbus.UInt64, "ApprovalDelay",
1784
type_func = lambda td: td.total_seconds() * 1000)
1803
type_func=lambda td: td.total_seconds() * 1000)
1785
1804
approval_duration = notifychangeproperty(
1786
1805
dbus.UInt64, "ApprovalDuration",
1787
type_func = lambda td: td.total_seconds() * 1000)
1806
type_func=lambda td: td.total_seconds() * 1000)
1788
1807
host = notifychangeproperty(dbus.String, "Host")
1789
1808
timeout = notifychangeproperty(
1790
1809
dbus.UInt64, "Timeout",
1791
type_func = lambda td: td.total_seconds() * 1000)
1810
type_func=lambda td: td.total_seconds() * 1000)
1792
1811
extended_timeout = notifychangeproperty(
1793
1812
dbus.UInt64, "ExtendedTimeout",
1794
type_func = lambda td: td.total_seconds() * 1000)
1813
type_func=lambda td: td.total_seconds() * 1000)
1795
1814
interval = notifychangeproperty(
1796
1815
dbus.UInt64, "Interval",
1797
type_func = lambda td: td.total_seconds() * 1000)
1816
type_func=lambda td: td.total_seconds() * 1000)
1798
1817
checker_command = notifychangeproperty(dbus.String, "Checker")
1799
1818
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1800
1819
invalidate_only=True)
1801
1820
1802
1821
del notifychangeproperty
1803
1822
1804
1823
def __del__(self, *args, **kwargs):
1805
1824
try:
1806
1825
self.remove_from_connection()
1809
1828
if hasattr(DBusObjectWithProperties, "__del__"):
1810
1829
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1811
1830
Client.__del__(self, *args, **kwargs)
1812
1831
1813
1832
def checker_callback(self, source, condition,
1814
1833
connection, command, *args, **kwargs):
1815
1834
ret = Client.checker_callback(self, source, condition,
1831
1850
| self.last_checker_signal),
1832
1851
dbus.String(command))
1833
1852
return ret
1834
1853
1835
1854
def start_checker(self, *args, **kwargs):
1836
1855
old_checker_pid = getattr(self.checker, "pid", None)
1837
1856
r = Client.start_checker(self, *args, **kwargs)
1841
1860
# Emit D-Bus signal
1842
1861
self.CheckerStarted(self.current_checker_command)
1843
1862
return r
1844
1863
1845
1864
def _reset_approved(self):
1846
1865
self.approved = None
1847
1866
return False
1848
1867
1849
1868
def approve(self, value=True):
1850
1869
self.approved = value
1851
1870
GLib.timeout_add(int(self.approval_duration.total_seconds()
1852
1871
* 1000), self._reset_approved)
1853
1872
self.send_changedstate()
1854
1855
## D-Bus methods, signals & properties
1856
1857
## Interfaces
1858
1859
## Signals
1860
1873
1874
# D-Bus methods, signals & properties
1875
1876
# Interfaces
1877
1878
# Signals
1879
1861
1880
# CheckerCompleted - signal
1862
1881
@dbus.service.signal(_interface, signature="nxs")
1863
1882
def CheckerCompleted(self, exitcode, waitstatus, command):
1864
1883
"D-Bus signal"
1865
1884
pass
1866
1885
1867
1886
# CheckerStarted - signal
1868
1887
@dbus.service.signal(_interface, signature="s")
1869
1888
def CheckerStarted(self, command):
1870
1889
"D-Bus signal"
1871
1890
pass
1872
1891
1873
1892
# PropertyChanged - signal
1874
1893
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1875
1894
@dbus.service.signal(_interface, signature="sv")
1876
1895
def PropertyChanged(self, property, value):
1877
1896
"D-Bus signal"
1878
1897
pass
1879
1898
1880
1899
# GotSecret - signal
1881
1900
@dbus.service.signal(_interface)
1882
1901
def GotSecret(self):
1885
1904
server to mandos-client
1886
1905
"""
1887
1906
pass
1888
1907
1889
1908
# Rejected - signal
1890
1909
@dbus.service.signal(_interface, signature="s")
1891
1910
def Rejected(self, reason):
1892
1911
"D-Bus signal"
1893
1912
pass
1894
1913
1895
1914
# NeedApproval - signal
1896
1915
@dbus.service.signal(_interface, signature="tb")
1897
1916
def NeedApproval(self, timeout, default):
1898
1917
"D-Bus signal"
1899
1918
return self.need_approval()
1900
1901
## Methods
1902
1919
1920
# Methods
1921
1903
1922
# Approve - method
1904
1923
@dbus.service.method(_interface, in_signature="b")
1905
1924
def Approve(self, value):
1906
1925
self.approve(value)
1907
1926
1908
1927
# CheckedOK - method
1909
1928
@dbus.service.method(_interface)
1910
1929
def CheckedOK(self):
1911
1930
self.checked_ok()
1912
1931
1913
1932
# Enable - method
1914
1933
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1915
1934
@dbus.service.method(_interface)
1916
1935
def Enable(self):
1917
1936
"D-Bus method"
1918
1937
self.enable()
1919
1938
1920
1939
# StartChecker - method
1921
1940
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1922
1941
@dbus.service.method(_interface)
1923
1942
def StartChecker(self):
1924
1943
"D-Bus method"
1925
1944
self.start_checker()
1926
1945
1927
1946
# Disable - method
1928
1947
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1929
1948
@dbus.service.method(_interface)
1930
1949
def Disable(self):
1931
1950
"D-Bus method"
1932
1951
self.disable()
1933
1952
1934
1953
# StopChecker - method
1935
1954
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1936
1955
@dbus.service.method(_interface)
1937
1956
def StopChecker(self):
1938
1957
self.stop_checker()
1939
1940
## Properties
1941
1958
1959
# Properties
1960
1942
1961
# ApprovalPending - property
1943
1962
@dbus_service_property(_interface, signature="b", access="read")
1944
1963
def ApprovalPending_dbus_property(self):
1945
1964
return dbus.Boolean(bool(self.approvals_pending))
1946
1965
1947
1966
# ApprovedByDefault - property
1948
1967
@dbus_service_property(_interface,
1949
1968
signature="b",
1952
1971
if value is None: # get
1953
1972
return dbus.Boolean(self.approved_by_default)
1954
1973
self.approved_by_default = bool(value)
1955
1974
1956
1975
# ApprovalDelay - property
1957
1976
@dbus_service_property(_interface,
1958
1977
signature="t",
1962
1981
return dbus.UInt64(self.approval_delay.total_seconds()
1963
1982
* 1000)
1964
1983
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1965
1984
1966
1985
# ApprovalDuration - property
1967
1986
@dbus_service_property(_interface,
1968
1987
signature="t",
1972
1991
return dbus.UInt64(self.approval_duration.total_seconds()
1973
1992
* 1000)
1974
1993
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1975
1994
1976
1995
# Name - property
1977
1996
@dbus_annotations(
1978
1997
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1979
1998
@dbus_service_property(_interface, signature="s", access="read")
1980
1999
def Name_dbus_property(self):
1981
2000
return dbus.String(self.name)
1982
2001
1983
2002
# Fingerprint - property
1984
2003
@dbus_annotations(
1985
2004
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1986
2005
@dbus_service_property(_interface, signature="s", access="read")
1987
2006
def Fingerprint_dbus_property(self):
1988
2007
return dbus.String(self.fingerprint)
1989
2008
1990
2009
# Host - property
1991
2010
@dbus_service_property(_interface,
1992
2011
signature="s",
1995
2014
if value is None: # get
1996
2015
return dbus.String(self.host)
1997
2016
self.host = str(value)
1998
2017
1999
2018
# Created - property
2000
2019
@dbus_annotations(
2001
2020
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2002
2021
@dbus_service_property(_interface, signature="s", access="read")
2003
2022
def Created_dbus_property(self):
2004
2023
return datetime_to_dbus(self.created)
2005
2024
2006
2025
# LastEnabled - property
2007
2026
@dbus_service_property(_interface, signature="s", access="read")
2008
2027
def LastEnabled_dbus_property(self):
2009
2028
return datetime_to_dbus(self.last_enabled)
2010
2029
2011
2030
# Enabled - property
2012
2031
@dbus_service_property(_interface,
2013
2032
signature="b",
2019
2038
self.enable()
2020
2039
else:
2021
2040
self.disable()
2022
2041
2023
2042
# LastCheckedOK - property
2024
2043
@dbus_service_property(_interface,
2025
2044
signature="s",
2029
2048
self.checked_ok()
2030
2049
return
2031
2050
return datetime_to_dbus(self.last_checked_ok)
2032
2051
2033
2052
# LastCheckerStatus - property
2034
2053
@dbus_service_property(_interface, signature="n", access="read")
2035
2054
def LastCheckerStatus_dbus_property(self):
2036
2055
return dbus.Int16(self.last_checker_status)
2037
2056
2038
2057
# Expires - property
2039
2058
@dbus_service_property(_interface, signature="s", access="read")
2040
2059
def Expires_dbus_property(self):
2041
2060
return datetime_to_dbus(self.expires)
2042
2061
2043
2062
# LastApprovalRequest - property
2044
2063
@dbus_service_property(_interface, signature="s", access="read")
2045
2064
def LastApprovalRequest_dbus_property(self):
2046
2065
return datetime_to_dbus(self.last_approval_request)
2047
2066
2048
2067
# Timeout - property
2049
2068
@dbus_service_property(_interface,
2050
2069
signature="t",
2069
2088
self.disable_initiator_tag = GLib.timeout_add(
2070
2089
int((self.expires - now).total_seconds() * 1000),
2071
2090
self.disable)
2072
2091
2073
2092
# ExtendedTimeout - property
2074
2093
@dbus_service_property(_interface,
2075
2094
signature="t",
2079
2098
return dbus.UInt64(self.extended_timeout.total_seconds()
2080
2099
* 1000)
2081
2100
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2082
2101
2083
2102
# Interval - property
2084
2103
@dbus_service_property(_interface,
2085
2104
signature="t",
2095
2114
GLib.source_remove(self.checker_initiator_tag)
2096
2115
self.checker_initiator_tag = GLib.timeout_add(
2097
2116
value, self.start_checker)
2098
self.start_checker() # Start one now, too
2099
2117
self.start_checker() # Start one now, too
2118
2100
2119
# Checker - property
2101
2120
@dbus_service_property(_interface,
2102
2121
signature="s",
2105
2124
if value is None: # get
2106
2125
return dbus.String(self.checker_command)
2107
2126
self.checker_command = str(value)
2108
2127
2109
2128
# CheckerRunning - property
2110
2129
@dbus_service_property(_interface,
2111
2130
signature="b",
2117
2136
self.start_checker()
2118
2137
else:
2119
2138
self.stop_checker()
2120
2139
2121
2140
# ObjectPath - property
2122
2141
@dbus_annotations(
2123
2142
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2124
2143
"org.freedesktop.DBus.Deprecated": "true"})
2125
2144
@dbus_service_property(_interface, signature="o", access="read")
2126
2145
def ObjectPath_dbus_property(self):
2127
return self.dbus_object_path # is already a dbus.ObjectPath
2128
2146
return self.dbus_object_path # is already a dbus.ObjectPath
2147
2129
2148
# Secret = property
2130
2149
@dbus_annotations(
2131
2150
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2136
2155
byte_arrays=True)
2137
2156
def Secret_dbus_property(self, value):
2138
2157
self.secret = bytes(value)
2139
2158
2140
2159
del _interface
2141
2160
2142
2161
2146
2165
self._pipe.send(('init', fpr, address))
2147
2166
if not self._pipe.recv():
2148
2167
raise KeyError(fpr)
2149
2168
2150
2169
def __getattribute__(self, name):
2151
2170
if name == '_pipe':
2152
2171
return super(ProxyClient, self).__getattribute__(name)
2155
2174
if data[0] == 'data':
2156
2175
return data[1]
2157
2176
if data[0] == 'function':
2158
2177
2159
2178
def func(*args, **kwargs):
2160
2179
self._pipe.send(('funcall', name, args, kwargs))
2161
2180
return self._pipe.recv()[1]
2162
2181
2163
2182
return func
2164
2183
2165
2184
def __setattr__(self, name, value):
2166
2185
if name == '_pipe':
2167
2186
return super(ProxyClient, self).__setattr__(name, value)
2170
2189
2171
2190
class ClientHandler(socketserver.BaseRequestHandler, object):
2172
2191
"""A class to handle client connections.
2173
2192
2174
2193
Instantiated once for each connection to handle it.
2175
2194
Note: This will run in its own forked process."""
2176
2195
2177
2196
def handle(self):
2178
2197
with contextlib.closing(self.server.child_pipe) as child_pipe:
2179
2198
logger.info("TCP connection from: %s",
2180
2199
str(self.client_address))
2181
2200
logger.debug("Pipe FD: %d",
2182
2201
self.server.child_pipe.fileno())
2183
2202
2184
2203
session = gnutls.ClientSession(self.request)
2185
2186
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
2187
# "+AES-256-CBC", "+SHA1",
2188
# "+COMP-NULL", "+CTYPE-OPENPGP",
2189
# "+DHE-DSS"))
2204
2205
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2206
# "+AES-256-CBC", "+SHA1",
2207
# "+COMP-NULL", "+CTYPE-OPENPGP",
2208
# "+DHE-DSS"))
2190
2209
# Use a fallback default, since this MUST be set.
2191
2210
priority = self.server.gnutls_priority
2192
2211
if priority is None:
2194
2213
gnutls.priority_set_direct(session._c_object,
2195
2214
priority.encode("utf-8"),
2196
2215
None)
2197
2216
2198
2217
# Start communication using the Mandos protocol
2199
2218
# Get protocol number
2200
2219
line = self.request.makefile().readline()
2205
2224
except (ValueError, IndexError, RuntimeError) as error:
2206
2225
logger.error("Unknown protocol version: %s", error)
2207
2226
return
2208
2227
2209
2228
# Start GnuTLS connection
2210
2229
try:
2211
2230
session.handshake()
2215
2234
# established. Just abandon the request.
2216
2235
return
2217
2236
logger.debug("Handshake succeeded")
2218
2237
2219
2238
approval_required = False
2220
2239
try:
2221
2240
try:
2225
2244
logger.warning("Bad certificate: %s", error)
2226
2245
return
2227
2246
logger.debug("Fingerprint: %s", fpr)
2228
2247
2229
2248
try:
2230
2249
client = ProxyClient(child_pipe, fpr,
2231
2250
self.client_address)
2232
2251
except KeyError:
2233
2252
return
2234
2253
2235
2254
if client.approval_delay:
2236
2255
delay = client.approval_delay
2237
2256
client.approvals_pending += 1
2238
2257
approval_required = True
2239
2258
2240
2259
while True:
2241
2260
if not client.enabled:
2242
2261
logger.info("Client %s is disabled",
2245
2264
# Emit D-Bus signal
2246
2265
client.Rejected("Disabled")
2247
2266
return
2248
2267
2249
2268
if client.approved or not client.approval_delay:
2250
#We are approved or approval is disabled
2269
# We are approved or approval is disabled
2251
2270
break
2252
2271
elif client.approved is None:
2253
2272
logger.info("Client %s needs approval",
2264
2283
# Emit D-Bus signal
2265
2284
client.Rejected("Denied")
2266
2285
return
2267
2268
#wait until timeout or approved
2286
2287
# wait until timeout or approved
2269
2288
time = datetime.datetime.now()
2270
2289
client.changedstate.acquire()
2271
2290
client.changedstate.wait(delay.total_seconds())
2284
2303
break
2285
2304
else:
2286
2305
delay -= time2 - time
2287
2306
2288
2307
try:
2289
2308
session.send(client.secret)
2290
2309
except gnutls.Error as error:
2291
2310
logger.warning("gnutls send failed",
2292
exc_info = error)
2311
exc_info=error)
2293
2312
return
2294
2313
2295
2314
logger.info("Sending secret to %s", client.name)
2296
2315
# bump the timeout using extended_timeout
2297
2316
client.bump_timeout(client.extended_timeout)
2298
2317
if self.server.use_dbus:
2299
2318
# Emit D-Bus signal
2300
2319
client.GotSecret()
2301
2320
2302
2321
finally:
2303
2322
if approval_required:
2304
2323
client.approvals_pending -= 1
2307
2326
except gnutls.Error as error:
2308
2327
logger.warning("GnuTLS bye failed",
2309
2328
exc_info=error)
2310
2329
2311
2330
@staticmethod
2312
2331
def peer_certificate(session):
2313
2332
"Return the peer's OpenPGP certificate as a bytestring"
2325
2344
return None
2326
2345
cert = cert_list[0]
2327
2346
return ctypes.string_at(cert.data, cert.size)
2328
2347
2329
2348
@staticmethod
2330
2349
def fingerprint(openpgp):
2331
2350
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2346
2365
ctypes.byref(crtverify))
2347
2366
if crtverify.value != 0:
2348
2367
gnutls.openpgp_crt_deinit(crt)
2349
raise gnutls.CertificateSecurityError("Verify failed")
2368
raise gnutls.CertificateSecurityError(code
2369
=crtverify.value)
2350
2370
# New buffer for the fingerprint
2351
2371
buf = ctypes.create_string_buffer(20)
2352
2372
buf_len = ctypes.c_size_t()
2364
2384
2365
2385
class MultiprocessingMixIn(object):
2366
2386
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2367
2387
2368
2388
def sub_process_main(self, request, address):
2369
2389
try:
2370
2390
self.finish_request(request, address)
2371
2391
except Exception:
2372
2392
self.handle_error(request, address)
2373
2393
self.close_request(request)
2374
2394
2375
2395
def process_request(self, request, address):
2376
2396
"""Start a new process to process the request."""
2377
proc = multiprocessing.Process(target = self.sub_process_main,
2378
args = (request, address))
2397
proc = multiprocessing.Process(target=self.sub_process_main,
2398
args=(request, address))
2379
2399
proc.start()
2380
2400
return proc
2381
2401
2382
2402
2383
2403
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2384
2404
""" adds a pipe to the MixIn """
2385
2405
2386
2406
def process_request(self, request, client_address):
2387
2407
"""Overrides and wraps the original process_request().
2388
2408
2389
2409
This function creates a new pipe in self.pipe
2390
2410
"""
2391
2411
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2392
2412
2393
2413
proc = MultiprocessingMixIn.process_request(self, request,
2394
2414
client_address)
2395
2415
self.child_pipe.close()
2396
2416
self.add_pipe(parent_pipe, proc)
2397
2417
2398
2418
def add_pipe(self, parent_pipe, proc):
2399
2419
"""Dummy function; override as necessary"""
2400
2420
raise NotImplementedError()
2403
2423
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2404
2424
socketserver.TCPServer, object):
2405
2425
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2406
2426
2407
2427
Attributes:
2408
2428
enabled: Boolean; whether this server is activated yet
2409
2429
interface: None or a network interface name (string)
2410
2430
use_ipv6: Boolean; to use IPv6 or not
2411
2431
"""
2412
2432
2413
2433
def __init__(self, server_address, RequestHandlerClass,
2414
2434
interface=None,
2415
2435
use_ipv6=True,
2425
2445
self.socketfd = socketfd
2426
2446
# Save the original socket.socket() function
2427
2447
self.socket_socket = socket.socket
2448
2428
2449
# To implement --socket, we monkey patch socket.socket.
2429
#
2450
#
2430
2451
# (When socketserver.TCPServer is a new-style class, we
2431
2452
# could make self.socket into a property instead of monkey
2432
2453
# patching socket.socket.)
2433
#
2454
#
2434
2455
# Create a one-time-only replacement for socket.socket()
2435
2456
@functools.wraps(socket.socket)
2436
2457
def socket_wrapper(*args, **kwargs):
2448
2469
# socket_wrapper(), if socketfd was set.
2449
2470
socketserver.TCPServer.__init__(self, server_address,
2450
2471
RequestHandlerClass)
2451
2472
2452
2473
def server_bind(self):
2453
2474
"""This overrides the normal server_bind() function
2454
2475
to bind to an interface if one was specified, and also NOT to
2481
2502
if self.server_address[0] or self.server_address[1]:
2482
2503
if not self.server_address[0]:
2483
2504
if self.address_family == socket.AF_INET6:
2484
any_address = "::" # in6addr_any
2505
any_address = "::" # in6addr_any
2485
2506
else:
2486
any_address = "0.0.0.0" # INADDR_ANY
2507
any_address = "0.0.0.0" # INADDR_ANY
2487
2508
self.server_address = (any_address,
2488
2509
self.server_address[1])
2489
2510
elif not self.server_address[1]:
2499
2520
2500
2521
class MandosServer(IPv6_TCPServer):
2501
2522
"""Mandos server.
2502
2523
2503
2524
Attributes:
2504
2525
clients: set of Client objects
2505
2526
gnutls_priority GnuTLS priority string
2506
2527
use_dbus: Boolean; to emit D-Bus signals or not
2507
2528
2508
2529
Assumes a GLib.MainLoop event loop.
2509
2530
"""
2510
2531
2511
2532
def __init__(self, server_address, RequestHandlerClass,
2512
2533
interface=None,
2513
2534
use_ipv6=True,
2523
2544
self.gnutls_priority = gnutls_priority
2524
2545
IPv6_TCPServer.__init__(self, server_address,
2525
2546
RequestHandlerClass,
2526
interface = interface,
2527
use_ipv6 = use_ipv6,
2528
socketfd = socketfd)
2529
2547
interface=interface,
2548
use_ipv6=use_ipv6,
2549
socketfd=socketfd)
2550
2530
2551
def server_activate(self):
2531
2552
if self.enabled:
2532
2553
return socketserver.TCPServer.server_activate(self)
2533
2554
2534
2555
def enable(self):
2535
2556
self.enabled = True
2536
2557
2537
2558
def add_pipe(self, parent_pipe, proc):
2538
2559
# Call "handle_ipc" for both data and EOF events
2539
2560
GLib.io_add_watch(
2540
2561
parent_pipe.fileno(),
2541
2562
GLib.IO_IN | GLib.IO_HUP,
2542
2563
functools.partial(self.handle_ipc,
2543
parent_pipe = parent_pipe,
2544
proc = proc))
2545
2564
parent_pipe=parent_pipe,
2565
proc=proc))
2566
2546
2567
def handle_ipc(self, source, condition,
2547
2568
parent_pipe=None,
2548
proc = None,
2569
proc=None,
2549
2570
client_object=None):
2550
2571
# error, or the other end of multiprocessing.Pipe has closed
2551
2572
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2552
2573
# Wait for other process to exit
2553
2574
proc.join()
2554
2575
return False
2555
2576
2556
2577
# Read a request from the child
2557
2578
request = parent_pipe.recv()
2558
2579
command = request[0]
2559
2580
2560
2581
if command == 'init':
2561
fpr = request[1]
2582
fpr = request[1].decode("ascii")
2562
2583
address = request[2]
2563
2584
2564
2585
for c in self.clients.values():
2565
2586
if c.fingerprint == fpr:
2566
2587
client = c
2574
2595
address[0])
2575
2596
parent_pipe.send(False)
2576
2597
return False
2577
2598
2578
2599
GLib.io_add_watch(
2579
2600
parent_pipe.fileno(),
2580
2601
GLib.IO_IN | GLib.IO_HUP,
2581
2602
functools.partial(self.handle_ipc,
2582
parent_pipe = parent_pipe,
2583
proc = proc,
2584
client_object = client))
2603
parent_pipe=parent_pipe,
2604
proc=proc,
2605
client_object=client))
2585
2606
parent_pipe.send(True)
2586
2607
# remove the old hook in favor of the new above hook on
2587
2608
# same fileno
2590
2611
funcname = request[1]
2591
2612
args = request[2]
2592
2613
kwargs = request[3]
2593
2614
2594
2615
parent_pipe.send(('data', getattr(client_object,
2595
2616
funcname)(*args,
2596
2617
**kwargs)))
2597
2618
2598
2619
if command == 'getattr':
2599
2620
attrname = request[1]
2600
2621
if isinstance(client_object.__getattribute__(attrname),
2603
2624
else:
2604
2625
parent_pipe.send((
2605
2626
'data', client_object.__getattribute__(attrname)))
2606
2627
2607
2628
if command == 'setattr':
2608
2629
attrname = request[1]
2609
2630
value = request[2]
2610
2631
setattr(client_object, attrname, value)
2611
2632
2612
2633
return True
2613
2634
2614
2635
2615
2636
def rfc3339_duration_to_delta(duration):
2616
2637
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2617
2638
2618
2639
>>> rfc3339_duration_to_delta("P7D")
2619
2640
datetime.timedelta(7)
2620
2641
>>> rfc3339_duration_to_delta("PT60S")
2630
2651
>>> rfc3339_duration_to_delta("P1DT3M20S")
2631
2652
datetime.timedelta(1, 200)
2632
2653
"""
2633
2654
2634
2655
# Parsing an RFC 3339 duration with regular expressions is not
2635
2656
# possible - there would have to be multiple places for the same
2636
2657
# values, like seconds. The current code, while more esoteric, is
2637
2658
# cleaner without depending on a parsing library. If Python had a
2638
2659
# built-in library for parsing we would use it, but we'd like to
2639
2660
# avoid excessive use of external libraries.
2640
2661
2641
2662
# New type for defining tokens, syntax, and semantics all-in-one
2642
2663
Token = collections.namedtuple("Token", (
2643
2664
"regexp", # To match token; if "value" is not None, must have
2676
2697
frozenset((token_year, token_month,
2677
2698
token_day, token_time,
2678
2699
token_week)))
2679
# Define starting values
2680
value = datetime.timedelta() # Value so far
2700
# Define starting values:
2701
# Value so far
2702
value = datetime.timedelta()
2681
2703
found_token = None
2682
followers = frozenset((token_duration, )) # Following valid tokens
2683
s = duration # String left to parse
2704
# Following valid tokens
2705
followers = frozenset((token_duration, ))
2706
# String left to parse
2707
s = duration
2684
2708
# Loop until end token is found
2685
2709
while found_token is not token_end:
2686
2710
# Search for any currently valid tokens
2710
2734
2711
2735
def string_to_delta(interval):
2712
2736
"""Parse a string and return a datetime.timedelta
2713
2737
2714
2738
>>> string_to_delta('7d')
2715
2739
datetime.timedelta(7)
2716
2740
>>> string_to_delta('60s')
2724
2748
>>> string_to_delta('5m 30s')
2725
2749
datetime.timedelta(0, 330)
2726
2750
"""
2727
2751
2728
2752
try:
2729
2753
return rfc3339_duration_to_delta(interval)
2730
2754
except ValueError:
2731
2755
pass
2732
2756
2733
2757
timevalue = datetime.timedelta(0)
2734
2758
for s in interval.split():
2735
2759
try:
2753
2777
return timevalue
2754
2778
2755
2779
2756
def daemon(nochdir = False, noclose = False):
2780
def daemon(nochdir=False, noclose=False):
2757
2781
"""See daemon(3). Standard BSD Unix function.
2758
2782
2759
2783
This should really exist as os.daemon, but it doesn't (yet)."""
2760
2784
if os.fork():
2761
2785
sys.exit()
2779
2803
2780
2804
2781
2805
def main():
2782
2806
2783
2807
##################################################################
2784
2808
# Parsing of options, both command line and config file
2785
2809
2786
2810
parser = argparse.ArgumentParser()
2787
2811
parser.add_argument("-v", "--version", action="version",
2788
version = "%(prog)s {}".format(version),
2812
version="%(prog)s {}".format(version),
2789
2813
help="show version number and exit")
2790
2814
parser.add_argument("-i", "--interface", metavar="IF",
2791
2815
help="Bind to interface IF")
2827
2851
parser.add_argument("--no-zeroconf", action="store_false",
2828
2852
dest="zeroconf", help="Do not use Zeroconf",
2829
2853
default=None)
2830
2854
2831
2855
options = parser.parse_args()
2832
2856
2833
2857
if options.check:
2834
2858
import doctest
2835
2859
fail_count, test_count = doctest.testmod()
2836
2860
sys.exit(os.EX_OK if fail_count == 0 else 1)
2837
2861
2838
2862
# Default values for config file for server-global settings
2839
server_defaults = { "interface": "",
2840
"address": "",
2841
"port": "",
2842
"debug": "False",
2843
"priority":
2844
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2845
":+SIGN-DSA-SHA256",
2846
"servicename": "Mandos",
2847
"use_dbus": "True",
2848
"use_ipv6": "True",
2849
"debuglevel": "",
2850
"restore": "True",
2851
"socket": "",
2852
"statedir": "/var/lib/mandos",
2853
"foreground": "False",
2854
"zeroconf": "True",
2855
}
2856
2863
server_defaults = {"interface": "",
2864
"address": "",
2865
"port": "",
2866
"debug": "False",
2867
"priority":
2868
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2869
":+SIGN-DSA-SHA256",
2870
"servicename": "Mandos",
2871
"use_dbus": "True",
2872
"use_ipv6": "True",
2873
"debuglevel": "",
2874
"restore": "True",
2875
"socket": "",
2876
"statedir": "/var/lib/mandos",
2877
"foreground": "False",
2878
"zeroconf": "True",
2879
}
2880
2857
2881
# Parse config file for server-global settings
2858
2882
server_config = configparser.SafeConfigParser(server_defaults)
2859
2883
del server_defaults
2861
2885
# Convert the SafeConfigParser object to a dict
2862
2886
server_settings = server_config.defaults()
2863
2887
# Use the appropriate methods on the non-string config options
2864
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2888
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2889
"foreground", "zeroconf"):
2865
2890
server_settings[option] = server_config.getboolean("DEFAULT",
2866
2891
option)
2867
2892
if server_settings["port"]:
2877
2902
server_settings["socket"] = os.dup(server_settings
2878
2903
["socket"])
2879
2904
del server_config
2880
2905
2881
2906
# Override the settings from the config file with command line
2882
2907
# options, if set.
2883
2908
for option in ("interface", "address", "port", "debug",
2901
2926
if server_settings["debug"]:
2902
2927
server_settings["foreground"] = True
2903
2928
# Now we have our good server settings in "server_settings"
2904
2929
2905
2930
##################################################################
2906
2931
2907
2932
if (not server_settings["zeroconf"]
2908
2933
and not (server_settings["port"]
2909
2934
or server_settings["socket"] != "")):
2910
2935
parser.error("Needs port or socket to work without Zeroconf")
2911
2936
2912
2937
# For convenience
2913
2938
debug = server_settings["debug"]
2914
2939
debuglevel = server_settings["debuglevel"]
2918
2943
stored_state_file)
2919
2944
foreground = server_settings["foreground"]
2920
2945
zeroconf = server_settings["zeroconf"]
2921
2946
2922
2947
if debug:
2923
2948
initlogger(debug, logging.DEBUG)
2924
2949
else:
2927
2952
else:
2928
2953
level = getattr(logging, debuglevel.upper())
2929
2954
initlogger(debug, level)
2930
2955
2931
2956
if server_settings["servicename"] != "Mandos":
2932
2957
syslogger.setFormatter(
2933
2958
logging.Formatter('Mandos ({}) [%(process)d]:'
2934
2959
' %(levelname)s: %(message)s'.format(
2935
2960
server_settings["servicename"])))
2936
2961
2937
2962
# Parse config file with clients
2938
2963
client_config = configparser.SafeConfigParser(Client
2939
2964
.client_defaults)
2940
2965
client_config.read(os.path.join(server_settings["configdir"],
2941
2966
"clients.conf"))
2942
2967
2943
2968
global mandos_dbus_service
2944
2969
mandos_dbus_service = None
2945
2970
2946
2971
socketfd = None
2947
2972
if server_settings["socket"] != "":
2948
2973
socketfd = server_settings["socket"]
2964
2989
except IOError as e:
2965
2990
logger.error("Could not open file %r", pidfilename,
2966
2991
exc_info=e)
2967
2992
2968
2993
for name, group in (("_mandos", "_mandos"),
2969
2994
("mandos", "mandos"),
2970
2995
("nobody", "nogroup")):
2988
3013
.format(uid, gid, os.strerror(error.errno)))
2989
3014
if error.errno != errno.EPERM:
2990
3015
raise
2991
3016
2992
3017
if debug:
2993
3018
# Enable all possible GnuTLS debugging
2994
3019
2995
3020
# "Use a log level over 10 to enable all debugging options."
2996
3021
# - GnuTLS manual
2997
3022
gnutls.global_set_log_level(11)
2998
3023
2999
3024
@gnutls.log_func
3000
3025
def debug_gnutls(level, string):
3001
3026
logger.debug("GnuTLS: %s", string[:-1])
3002
3027
3003
3028
gnutls.global_set_log_function(debug_gnutls)
3004
3029
3005
3030
# Redirect stdin so all checkers get /dev/null
3006
3031
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
3007
3032
os.dup2(null, sys.stdin.fileno())
3008
3033
if null > 2:
3009
3034
os.close(null)
3010
3035
3011
3036
# Need to fork before connecting to D-Bus
3012
3037
if not foreground:
3013
3038
# Close all input and output, do double fork, etc.
3014
3039
daemon()
3015
3040
3016
3041
# multiprocessing will use threads, so before we use GLib we need
3017
3042
# to inform GLib that threads will be used.
3018
3043
GLib.threads_init()
3019
3044
3020
3045
global main_loop
3021
3046
# From the Avahi example code
3022
3047
DBusGMainLoop(set_as_default=True)
3039
3064
if zeroconf:
3040
3065
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3041
3066
service = AvahiServiceToSyslog(
3042
name = server_settings["servicename"],
3043
servicetype = "_mandos._tcp",
3044
protocol = protocol,
3045
bus = bus)
3067
name=server_settings["servicename"],
3068
servicetype="_mandos._tcp",
3069
protocol=protocol,
3070
bus=bus)
3046
3071
if server_settings["interface"]:
3047
3072
service.interface = if_nametoindex(
3048
3073
server_settings["interface"].encode("utf-8"))
3049
3074
3050
3075
global multiprocessing_manager
3051
3076
multiprocessing_manager = multiprocessing.Manager()
3052
3077
3053
3078
client_class = Client
3054
3079
if use_dbus:
3055
client_class = functools.partial(ClientDBus, bus = bus)
3056
3080
client_class = functools.partial(ClientDBus, bus=bus)
3081
3057
3082
client_settings = Client.config_parser(client_config)
3058
3083
old_client_settings = {}
3059
3084
clients_data = {}
3060
3085
3061
3086
# This is used to redirect stdout and stderr for checker processes
3062
3087
global wnull
3063
wnull = open(os.devnull, "w") # A writable /dev/null
3088
wnull = open(os.devnull, "w") # A writable /dev/null
3064
3089
# Only used if server is running in foreground but not in debug
3065
3090
# mode
3066
3091
if debug or not foreground:
3067
3092
wnull.close()
3068
3093
3069
3094
# Get client data and settings from last running state.
3070
3095
if server_settings["restore"]:
3071
3096
try:
3072
3097
with open(stored_state_path, "rb") as stored_state:
3073
if sys.version_info.major == 2:
3098
if sys.version_info.major == 2:
3074
3099
clients_data, old_client_settings = pickle.load(
3075
3100
stored_state)
3076
3101
else:
3077
3102
bytes_clients_data, bytes_old_client_settings = (
3078
pickle.load(stored_state, encoding = "bytes"))
3079
### Fix bytes to strings
3080
## clients_data
3103
pickle.load(stored_state, encoding="bytes"))
3104
# Fix bytes to strings
3105
# clients_data
3081
3106
# .keys()
3082
clients_data = { (key.decode("utf-8")
3083
if isinstance(key, bytes)
3084
else key): value
3085
for key, value in
3086
bytes_clients_data.items() }
3107
clients_data = {(key.decode("utf-8")
3108
if isinstance(key, bytes)
3109
else key): value
3110
for key, value in
3111
bytes_clients_data.items()}
3087
3112
del bytes_clients_data
3088
3113
for key in clients_data:
3089
value = { (k.decode("utf-8")
3090
if isinstance(k, bytes) else k): v
3091
for k, v in
3092
clients_data[key].items() }
3114
value = {(k.decode("utf-8")
3115
if isinstance(k, bytes) else k): v
3116
for k, v in
3117
clients_data[key].items()}
3093
3118
clients_data[key] = value
3094
3119
# .client_structure
3095
3120
value["client_structure"] = [
3096
3121
(s.decode("utf-8")
3097
3122
if isinstance(s, bytes)
3098
3123
else s) for s in
3099
value["client_structure"] ]
3124
value["client_structure"]]
3100
3125
# .name & .host
3101
3126
for k in ("name", "host"):
3102
3127
if isinstance(value[k], bytes):
3103
3128
value[k] = value[k].decode("utf-8")
3104
## old_client_settings
3129
# old_client_settings
3105
3130
# .keys()
3106
3131
old_client_settings = {
3107
3132
(key.decode("utf-8")
3108
3133
if isinstance(key, bytes)
3109
3134
else key): value
3110
3135
for key, value in
3111
bytes_old_client_settings.items() }
3136
bytes_old_client_settings.items()}
3112
3137
del bytes_old_client_settings
3113
3138
# .host
3114
3139
for value in old_client_settings.values():
3128
3153
logger.warning("Could not load persistent state: "
3129
3154
"EOFError:",
3130
3155
exc_info=e)
3131
3156
3132
3157
with PGPEngine() as pgp:
3133
3158
for client_name, client in clients_data.items():
3134
3159
# Skip removed clients
3135
3160
if client_name not in client_settings:
3136
3161
continue
3137
3162
3138
3163
# Decide which value to use after restoring saved state.
3139
3164
# We have three different values: Old config file,
3140
3165
# new config file, and saved state.
3151
3176
client[name] = value
3152
3177
except KeyError:
3153
3178
pass
3154
3179
3155
3180
# Clients who has passed its expire date can still be
3156
3181
# enabled if its last checker was successful. A Client
3157
3182
# whose checker succeeded before we stored its state is
3190
3215
client_name))
3191
3216
client["secret"] = (client_settings[client_name]
3192
3217
["secret"])
3193
3218
3194
3219
# Add/remove clients based on new changes made to config
3195
3220
for client_name in (set(old_client_settings)
3196
3221
- set(client_settings)):
3198
3223
for client_name in (set(client_settings)
3199
3224
- set(old_client_settings)):
3200
3225
clients_data[client_name] = client_settings[client_name]
3201
3226
3202
3227
# Create all client objects
3203
3228
for client_name, client in clients_data.items():
3204
3229
tcp_server.clients[client_name] = client_class(
3205
name = client_name,
3206
settings = client,
3207
server_settings = server_settings)
3208
3230
name=client_name,
3231
settings=client,
3232
server_settings=server_settings)
3233
3209
3234
if not tcp_server.clients:
3210
3235
logger.warning("No clients defined")
3211
3236
3212
3237
if not foreground:
3213
3238
if pidfile is not None:
3214
3239
pid = os.getpid()
3220
3245
pidfilename, pid)
3221
3246
del pidfile
3222
3247
del pidfilename
3223
3248
3224
3249
for termsig in (signal.SIGHUP, signal.SIGTERM):
3225
3250
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3226
3251
lambda: main_loop.quit() and False)
3227
3252
3228
3253
if use_dbus:
3229
3254
3230
3255
@alternate_dbus_interfaces(
3231
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
3256
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3232
3257
class MandosDBusService(DBusObjectWithObjectManager):
3233
3258
"""A D-Bus proxy object"""
3234
3259
3235
3260
def __init__(self):
3236
3261
dbus.service.Object.__init__(self, bus, "/")
3237
3262
3238
3263
_interface = "se.recompile.Mandos"
3239
3264
3240
3265
@dbus.service.signal(_interface, signature="o")
3241
3266
def ClientAdded(self, objpath):
3242
3267
"D-Bus signal"
3243
3268
pass
3244
3269
3245
3270
@dbus.service.signal(_interface, signature="ss")
3246
3271
def ClientNotFound(self, fingerprint, address):
3247
3272
"D-Bus signal"
3248
3273
pass
3249
3274
3250
3275
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3251
3276
"true"})
3252
3277
@dbus.service.signal(_interface, signature="os")
3253
3278
def ClientRemoved(self, objpath, name):
3254
3279
"D-Bus signal"
3255
3280
pass
3256
3281
3257
3282
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3258
3283
"true"})
3259
3284
@dbus.service.method(_interface, out_signature="ao")
3261
3286
"D-Bus method"
3262
3287
return dbus.Array(c.dbus_object_path for c in
3263
3288
tcp_server.clients.values())
3264
3289
3265
3290
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3266
3291
"true"})
3267
3292
@dbus.service.method(_interface,
3269
3294
def GetAllClientsWithProperties(self):
3270
3295
"D-Bus method"
3271
3296
return dbus.Dictionary(
3272
{ c.dbus_object_path: c.GetAll(
3297
{c.dbus_object_path: c.GetAll(
3273
3298
"se.recompile.Mandos.Client")
3274
for c in tcp_server.clients.values() },
3299
for c in tcp_server.clients.values()},
3275
3300
signature="oa{sv}")
3276
3301
3277
3302
@dbus.service.method(_interface, in_signature="o")
3278
3303
def RemoveClient(self, object_path):
3279
3304
"D-Bus method"
3287
3312
self.client_removed_signal(c)
3288
3313
return
3289
3314
raise KeyError(object_path)
3290
3315
3291
3316
del _interface
3292
3317
3293
3318
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3294
out_signature = "a{oa{sa{sv}}}")
3319
out_signature="a{oa{sa{sv}}}")
3295
3320
def GetManagedObjects(self):
3296
3321
"""D-Bus method"""
3297
3322
return dbus.Dictionary(
3298
{ client.dbus_object_path:
3299
dbus.Dictionary(
3300
{ interface: client.GetAll(interface)
3301
for interface in
3302
client._get_all_interface_names()})
3303
for client in tcp_server.clients.values()})
3304
3323
{client.dbus_object_path:
3324
dbus.Dictionary(
3325
{interface: client.GetAll(interface)
3326
for interface in
3327
client._get_all_interface_names()})
3328
for client in tcp_server.clients.values()})
3329
3305
3330
def client_added_signal(self, client):
3306
3331
"""Send the new standard signal and the old signal"""
3307
3332
if use_dbus:
3309
3334
self.InterfacesAdded(
3310
3335
client.dbus_object_path,
3311
3336
dbus.Dictionary(
3312
{ interface: client.GetAll(interface)
3313
for interface in
3314
client._get_all_interface_names()}))
3337
{interface: client.GetAll(interface)
3338
for interface in
3339
client._get_all_interface_names()}))
3315
3340
# Old signal
3316
3341
self.ClientAdded(client.dbus_object_path)
3317
3342
3318
3343
def client_removed_signal(self, client):
3319
3344
"""Send the new standard signal and the old signal"""
3320
3345
if use_dbus:
3325
3350
# Old signal
3326
3351
self.ClientRemoved(client.dbus_object_path,
3327
3352
client.name)
3328
3353
3329
3354
mandos_dbus_service = MandosDBusService()
3330
3355
3331
3356
# Save modules to variables to exempt the modules from being
3332
3357
# unloaded before the function registered with atexit() is run.
3333
3358
mp = multiprocessing
3334
3359
wn = wnull
3360
3335
3361
def cleanup():
3336
3362
"Cleanup function; run on exit"
3337
3363
if zeroconf:
3338
3364
service.cleanup()
3339
3365
3340
3366
mp.active_children()
3341
3367
wn.close()
3342
3368
if not (tcp_server.clients or client_settings):
3343
3369
return
3344
3370
3345
3371
# Store client before exiting. Secrets are encrypted with key
3346
3372
# based on what config file has. If config file is
3347
3373
# removed/edited, old secret will thus be unrecovable.
3352
3378
client.encrypted_secret = pgp.encrypt(client.secret,
3353
3379
key)
3354
3380
client_dict = {}
3355
3381
3356
3382
# A list of attributes that can not be pickled
3357
3383
# + secret.
3358
exclude = { "bus", "changedstate", "secret",
3359
"checker", "server_settings" }
3384
exclude = {"bus", "changedstate", "secret",
3385
"checker", "server_settings"}
3360
3386
for name, typ in inspect.getmembers(dbus.service
3361
3387
.Object):
3362
3388
exclude.add(name)
3363
3389
3364
3390
client_dict["encrypted_secret"] = (client
3365
3391
.encrypted_secret)
3366
3392
for attr in client.client_structure:
3367
3393
if attr not in exclude:
3368
3394
client_dict[attr] = getattr(client, attr)
3369
3395
3370
3396
clients[client.name] = client_dict
3371
3397
del client_settings[client.name]["secret"]
3372
3398
3373
3399
try:
3374
3400
with tempfile.NamedTemporaryFile(
3375
3401
mode='wb',
3378
3404
dir=os.path.dirname(stored_state_path),
3379
3405
delete=False) as stored_state:
3380
3406
pickle.dump((clients, client_settings), stored_state,
3381
protocol = 2)
3407
protocol=2)
3382
3408
tempname = stored_state.name
3383
3409
os.rename(tempname, stored_state_path)
3384
3410
except (IOError, OSError) as e:
3394
3420
logger.warning("Could not save persistent state:",
3395
3421
exc_info=e)
3396
3422
raise
3397
3423
3398
3424
# Delete all clients, and settings from config
3399
3425
while tcp_server.clients:
3400
3426
name, client = tcp_server.clients.popitem()
3406
3432
if use_dbus:
3407
3433
mandos_dbus_service.client_removed_signal(client)
3408
3434
client_settings.clear()
3409
3435
3410
3436
atexit.register(cleanup)
3411
3437
3412
3438
for client in tcp_server.clients.values():
3413
3439
if use_dbus:
3414
3440
# Emit D-Bus signal for adding
3416
3442
# Need to initiate checking of clients
3417
3443
if client.enabled:
3418
3444
client.init_checker()
3419
3445
3420
3446
tcp_server.enable()
3421
3447
tcp_server.server_activate()
3422
3448
3423
3449
# Find out what port we got
3424
3450
if zeroconf:
3425
3451
service.port = tcp_server.socket.getsockname()[1]
3430
3456
else: # IPv4
3431
3457
logger.info("Now listening on address %r, port %d",
3432
3458
*tcp_server.socket.getsockname())
3433
3434
#service.interface = tcp_server.socket.getsockname()[3]
3435
3459
3460
# service.interface = tcp_server.socket.getsockname()[3]
3461
3436
3462
try:
3437
3463
if zeroconf:
3438
3464
# From the Avahi example code
3443
3469
cleanup()
3444
3470
sys.exit(1)
3445
3471
# End of Avahi example code
3446
3472
3447
3473
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3448
3474
lambda *args, **kwargs:
3449
3475
(tcp_server.handle_request
3450
3476
(*args[2:], **kwargs) or True))
3451
3477
3452
3478
logger.debug("Starting main loop")
3453
3479
main_loop.run()
3454
3480
except AvahiError as error:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0