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- Committer: Teddy Hogeborn
- Date: 2016-08-25 17:37:05 UTC
- Revision ID: teddy@recompile.se-20160825173705-q2v6lban8ph9uw75
PEP8 compliance: mandos
* mandos: Add PEP8 compliance (as per the "pycodestyle" tool).
* mandos: Add PEP8 compliance (as per the "pycodestyle" tool).
- files modified:
- mandos
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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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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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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#
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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_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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.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(
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ctypes.util.find_library("gnutls"))
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_need_version = b"3.3.0"
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def __init__(self):
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# Need to use class name "GnuTLS" here, since this method is
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# called before the assignment to the "gnutls" global variable
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if GnuTLS.check_version(self._need_version) is None:
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raise GnuTLS.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):
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_fields_ = []
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session_t = ctypes.POINTER(session_int)
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541
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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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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close_request_t = ctypes.c_int
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# Exceptions
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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=()):
566
def __init__(self, message=None, code=None, args=()):
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# Default usage is by a message string, but if a return
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# code is passed, convert it to a string with
561
569
# gnutls.strerror()
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message = GnuTLS.strerror(code)
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return super(GnuTLS.Error, self).__init__(
566
574
message, *args)
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575
568
576
class CertificateSecurityError(Error):
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pass
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571
579
# Classes
572
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class Credentials(object):
573
581
def __init__(self):
575
583
gnutls.certificate_allocate_credentials(
576
584
ctypes.byref(self._c_object))
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self.type = gnutls.CRD_CERTIFICATE
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579
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def __del__(self):
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gnutls.certificate_free_credentials(self._c_object)
581
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582
590
class ClientSession(object):
583
def __init__(self, socket, credentials = None):
591
def __init__(self, socket, credentials=None):
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self._c_object = gnutls.session_t()
585
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gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
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gnutls.set_default_priority(self._c_object)
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ctypes.cast(credentials._c_object,
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ctypes.c_void_p))
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self.credentials = credentials
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605
598
606
def __del__(self):
599
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gnutls.deinit(self._c_object)
600
608
601
609
def handshake(self):
602
610
return gnutls.handshake(self._c_object)
603
611
604
612
def send(self, data):
605
613
data = bytes(data)
606
614
data_len = len(data)
608
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data_len -= gnutls.record_send(self._c_object,
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617
data[-data_len:],
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618
data_len)
611
619
612
620
def bye(self):
613
621
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
614
622
615
623
# Error handling functions
616
624
def _error_code(result):
617
625
"""A function to raise exceptions on errors, suitable
619
627
if result >= 0:
620
628
return result
621
629
if result == gnutls.E_NO_CERTIFICATE_FOUND:
622
raise gnutls.CertificateSecurityError(code = result)
623
raise gnutls.Error(code = result)
624
630
raise gnutls.CertificateSecurityError(code=result)
631
raise gnutls.Error(code=result)
632
625
633
def _retry_on_error(result, func, arguments):
626
634
"""A function to retry on some errors, suitable
627
635
for the 'errcheck' attribute on ctypes functions"""
630
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return _error_code(result)
631
639
result = func(*arguments)
632
640
return result
633
641
634
642
# Unless otherwise indicated, the function declarations below are
635
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# all from the gnutls/gnutls.h C header file.
636
644
637
645
# Functions
638
646
priority_set_direct = _library.gnutls_priority_set_direct
639
647
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
640
648
ctypes.POINTER(ctypes.c_char_p)]
641
649
priority_set_direct.restype = _error_code
642
650
643
651
init = _library.gnutls_init
644
652
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
645
653
init.restype = _error_code
646
654
647
655
set_default_priority = _library.gnutls_set_default_priority
648
656
set_default_priority.argtypes = [session_t]
649
657
set_default_priority.restype = _error_code
650
658
651
659
record_send = _library.gnutls_record_send
652
660
record_send.argtypes = [session_t, ctypes.c_void_p,
653
661
ctypes.c_size_t]
654
662
record_send.restype = ctypes.c_ssize_t
655
663
record_send.errcheck = _retry_on_error
656
664
657
665
certificate_allocate_credentials = (
658
666
_library.gnutls_certificate_allocate_credentials)
659
667
certificate_allocate_credentials.argtypes = [
660
668
ctypes.POINTER(certificate_credentials_t)]
661
669
certificate_allocate_credentials.restype = _error_code
662
670
663
671
certificate_free_credentials = (
664
672
_library.gnutls_certificate_free_credentials)
665
certificate_free_credentials.argtypes = [certificate_credentials_t]
673
certificate_free_credentials.argtypes = [
674
certificate_credentials_t]
666
675
certificate_free_credentials.restype = None
667
676
668
677
handshake_set_private_extensions = (
669
678
_library.gnutls_handshake_set_private_extensions)
670
679
handshake_set_private_extensions.argtypes = [session_t,
671
680
ctypes.c_int]
672
681
handshake_set_private_extensions.restype = None
673
682
674
683
credentials_set = _library.gnutls_credentials_set
675
684
credentials_set.argtypes = [session_t, credentials_type_t,
676
685
ctypes.c_void_p]
677
686
credentials_set.restype = _error_code
678
687
679
688
strerror = _library.gnutls_strerror
680
689
strerror.argtypes = [ctypes.c_int]
681
690
strerror.restype = ctypes.c_char_p
682
691
683
692
certificate_type_get = _library.gnutls_certificate_type_get
684
693
certificate_type_get.argtypes = [session_t]
685
694
certificate_type_get.restype = _error_code
686
695
687
696
certificate_get_peers = _library.gnutls_certificate_get_peers
688
697
certificate_get_peers.argtypes = [session_t,
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698
ctypes.POINTER(ctypes.c_uint)]
690
699
certificate_get_peers.restype = ctypes.POINTER(datum_t)
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700
692
701
global_set_log_level = _library.gnutls_global_set_log_level
693
702
global_set_log_level.argtypes = [ctypes.c_int]
694
703
global_set_log_level.restype = None
695
704
696
705
global_set_log_function = _library.gnutls_global_set_log_function
697
706
global_set_log_function.argtypes = [log_func]
698
707
global_set_log_function.restype = None
699
708
700
709
deinit = _library.gnutls_deinit
701
710
deinit.argtypes = [session_t]
702
711
deinit.restype = None
703
712
704
713
handshake = _library.gnutls_handshake
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714
handshake.argtypes = [session_t]
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715
handshake.restype = _error_code
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716
handshake.errcheck = _retry_on_error
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717
709
718
transport_set_ptr = _library.gnutls_transport_set_ptr
710
719
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
711
720
transport_set_ptr.restype = None
712
721
713
722
bye = _library.gnutls_bye
714
723
bye.argtypes = [session_t, close_request_t]
715
724
bye.restype = _error_code
716
725
bye.errcheck = _retry_on_error
717
726
718
727
check_version = _library.gnutls_check_version
719
728
check_version.argtypes = [ctypes.c_char_p]
720
729
check_version.restype = ctypes.c_char_p
721
730
722
731
# All the function declarations below are from gnutls/openpgp.h
723
732
724
733
openpgp_crt_init = _library.gnutls_openpgp_crt_init
725
734
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
726
735
openpgp_crt_init.restype = _error_code
727
736
728
737
openpgp_crt_import = _library.gnutls_openpgp_crt_import
729
738
openpgp_crt_import.argtypes = [openpgp_crt_t,
730
739
ctypes.POINTER(datum_t),
731
740
openpgp_crt_fmt_t]
732
741
openpgp_crt_import.restype = _error_code
733
742
734
743
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
735
744
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
736
745
ctypes.POINTER(ctypes.c_uint)]
737
746
openpgp_crt_verify_self.restype = _error_code
738
747
739
748
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
740
749
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
741
750
openpgp_crt_deinit.restype = None
742
751
743
752
openpgp_crt_get_fingerprint = (
744
753
_library.gnutls_openpgp_crt_get_fingerprint)
745
754
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
747
756
ctypes.POINTER(
748
757
ctypes.c_size_t)]
749
758
openpgp_crt_get_fingerprint.restype = _error_code
750
759
751
760
# Remove non-public functions
752
761
del _error_code, _retry_on_error
753
762
# Create the global "gnutls" object, simulating a module
754
763
gnutls = GnuTLS()
755
764
765
756
766
def call_pipe(connection, # : multiprocessing.Connection
757
767
func, *args, **kwargs):
758
768
"""This function is meant to be called by multiprocessing.Process
759
769
760
770
This function runs func(*args, **kwargs), and writes the resulting
761
771
return value on the provided multiprocessing.Connection.
762
772
"""
763
773
connection.send(func(*args, **kwargs))
764
774
connection.close()
765
775
776
766
777
class Client(object):
767
778
"""A representation of a client host served by this server.
768
779
769
780
Attributes:
770
781
approved: bool(); 'None' if not yet approved/disapproved
771
782
approval_delay: datetime.timedelta(); Time to wait for approval
808
819
disabled, or None
809
820
server_settings: The server_settings dict from main()
810
821
"""
811
822
812
823
runtime_expansions = ("approval_delay", "approval_duration",
813
824
"created", "enabled", "expires",
814
825
"fingerprint", "host", "interval",
825
836
"approved_by_default": "True",
826
837
"enabled": "True",
827
838
}
828
839
829
840
@staticmethod
830
841
def config_parser(config):
831
842
"""Construct a new dict of client settings of this form:
838
849
for client_name in config.sections():
839
850
section = dict(config.items(client_name))
840
851
client = settings[client_name] = {}
841
852
842
853
client["host"] = section["host"]
843
854
# Reformat values from string types to Python types
844
855
client["approved_by_default"] = config.getboolean(
845
856
client_name, "approved_by_default")
846
857
client["enabled"] = config.getboolean(client_name,
847
858
"enabled")
848
859
849
860
# Uppercase and remove spaces from fingerprint for later
850
861
# comparison purposes with return value from the
851
862
# fingerprint() function
875
886
client["last_approval_request"] = None
876
887
client["last_checked_ok"] = None
877
888
client["last_checker_status"] = -2
878
889
879
890
return settings
880
881
def __init__(self, settings, name = None, server_settings=None):
891
892
def __init__(self, settings, name=None, server_settings=None):
882
893
self.name = name
883
894
if server_settings is None:
884
895
server_settings = {}
886
897
# adding all client settings
887
898
for setting, value in settings.items():
888
899
setattr(self, setting, value)
889
900
890
901
if self.enabled:
891
902
if not hasattr(self, "last_enabled"):
892
903
self.last_enabled = datetime.datetime.utcnow()
896
907
else:
897
908
self.last_enabled = None
898
909
self.expires = None
899
910
900
911
logger.debug("Creating client %r", self.name)
901
912
logger.debug(" Fingerprint: %s", self.fingerprint)
902
913
self.created = settings.get("created",
903
914
datetime.datetime.utcnow())
904
915
905
916
# attributes specific for this server instance
906
917
self.checker = None
907
918
self.checker_initiator_tag = None
916
927
for attr in self.__dict__.keys()
917
928
if not attr.startswith("_")]
918
929
self.client_structure.append("client_structure")
919
930
920
931
for name, t in inspect.getmembers(
921
932
type(self), lambda obj: isinstance(obj, property)):
922
933
if not name.startswith("_"):
923
934
self.client_structure.append(name)
924
935
925
936
# Send notice to process children that client state has changed
926
937
def send_changedstate(self):
927
938
with self.changedstate:
928
939
self.changedstate.notify_all()
929
940
930
941
def enable(self):
931
942
"""Start this client's checker and timeout hooks"""
932
943
if getattr(self, "enabled", False):
937
948
self.last_enabled = datetime.datetime.utcnow()
938
949
self.init_checker()
939
950
self.send_changedstate()
940
951
941
952
def disable(self, quiet=True):
942
953
"""Disable this client."""
943
954
if not getattr(self, "enabled", False):
957
968
self.send_changedstate()
958
969
# Do not run this again if called by a GLib.timeout_add
959
970
return False
960
971
961
972
def __del__(self):
962
973
self.disable()
963
974
964
975
def init_checker(self):
965
976
# Schedule a new checker to be started an 'interval' from now,
966
977
# and every interval from then on.
976
987
int(self.timeout.total_seconds() * 1000), self.disable)
977
988
# Also start a new checker *right now*.
978
989
self.start_checker()
979
990
980
991
def checker_callback(self, source, condition, connection,
981
992
command):
982
993
"""The checker has completed, so take appropriate actions."""
985
996
# Read return code from connection (see call_pipe)
986
997
returncode = connection.recv()
987
998
connection.close()
988
999
989
1000
if returncode >= 0:
990
1001
self.last_checker_status = returncode
991
1002
self.last_checker_signal = None
1001
1012
logger.warning("Checker for %(name)s crashed?",
1002
1013
vars(self))
1003
1014
return False
1004
1015
1005
1016
def checked_ok(self):
1006
1017
"""Assert that the client has been seen, alive and well."""
1007
1018
self.last_checked_ok = datetime.datetime.utcnow()
1008
1019
self.last_checker_status = 0
1009
1020
self.last_checker_signal = None
1010
1021
self.bump_timeout()
1011
1022
1012
1023
def bump_timeout(self, timeout=None):
1013
1024
"""Bump up the timeout for this client."""
1014
1025
if timeout is None:
1020
1031
self.disable_initiator_tag = GLib.timeout_add(
1021
1032
int(timeout.total_seconds() * 1000), self.disable)
1022
1033
self.expires = datetime.datetime.utcnow() + timeout
1023
1034
1024
1035
def need_approval(self):
1025
1036
self.last_approval_request = datetime.datetime.utcnow()
1026
1037
1027
1038
def start_checker(self):
1028
1039
"""Start a new checker subprocess if one is not running.
1029
1040
1030
1041
If a checker already exists, leave it running and do
1031
1042
nothing."""
1032
1043
# The reason for not killing a running checker is that if we
1037
1048
# checkers alone, the checker would have to take more time
1038
1049
# than 'timeout' for the client to be disabled, which is as it
1039
1050
# should be.
1040
1051
1041
1052
if self.checker is not None and not self.checker.is_alive():
1042
1053
logger.warning("Checker was not alive; joining")
1043
1054
self.checker.join()
1047
1058
# Escape attributes for the shell
1048
1059
escaped_attrs = {
1049
1060
attr: re.escape(str(getattr(self, attr)))
1050
for attr in self.runtime_expansions }
1061
for attr in self.runtime_expansions}
1051
1062
try:
1052
1063
command = self.checker_command % escaped_attrs
1053
1064
except TypeError as error:
1065
1076
# The exception is when not debugging but nevertheless
1066
1077
# running in the foreground; use the previously
1067
1078
# created wnull.
1068
popen_args = { "close_fds": True,
1069
"shell": True,
1070
"cwd": "/" }
1079
popen_args = {"close_fds": True,
1080
"shell": True,
1081
"cwd": "/"}
1071
1082
if (not self.server_settings["debug"]
1072
1083
and self.server_settings["foreground"]):
1073
1084
popen_args.update({"stdout": wnull,
1074
"stderr": wnull })
1075
pipe = multiprocessing.Pipe(duplex = False)
1085
"stderr": wnull})
1086
pipe = multiprocessing.Pipe(duplex=False)
1076
1087
self.checker = multiprocessing.Process(
1077
target = call_pipe,
1078
args = (pipe[1], subprocess.call, command),
1079
kwargs = popen_args)
1088
target=call_pipe,
1089
args=(pipe[1], subprocess.call, command),
1090
kwargs=popen_args)
1080
1091
self.checker.start()
1081
1092
self.checker_callback_tag = GLib.io_add_watch(
1082
1093
pipe[0].fileno(), GLib.IO_IN,
1083
1094
self.checker_callback, pipe[0], command)
1084
1095
# Re-run this periodically if run by GLib.timeout_add
1085
1096
return True
1086
1097
1087
1098
def stop_checker(self):
1088
1099
"""Force the checker process, if any, to stop."""
1089
1100
if self.checker_callback_tag:
1102
1113
byte_arrays=False):
1103
1114
"""Decorators for marking methods of a DBusObjectWithProperties to
1104
1115
become properties on the D-Bus.
1105
1116
1106
1117
The decorated method will be called with no arguments by "Get"
1107
1118
and with one argument by "Set".
1108
1119
1109
1120
The parameters, where they are supported, are the same as
1110
1121
dbus.service.method, except there is only "signature", since the
1111
1122
type from Get() and the type sent to Set() is the same.
1115
1126
if byte_arrays and signature != "ay":
1116
1127
raise ValueError("Byte arrays not supported for non-'ay'"
1117
1128
" signature {!r}".format(signature))
1118
1129
1119
1130
def decorator(func):
1120
1131
func._dbus_is_property = True
1121
1132
func._dbus_interface = dbus_interface
1124
1135
func._dbus_name = func.__name__
1125
1136
if func._dbus_name.endswith("_dbus_property"):
1126
1137
func._dbus_name = func._dbus_name[:-14]
1127
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
1138
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1128
1139
return func
1129
1140
1130
1141
return decorator
1131
1142
1132
1143
1133
1144
def dbus_interface_annotations(dbus_interface):
1134
1145
"""Decorator for marking functions returning interface annotations
1135
1146
1136
1147
Usage:
1137
1148
1138
1149
@dbus_interface_annotations("org.example.Interface")
1139
1150
def _foo(self): # Function name does not matter
1140
1151
return {"org.freedesktop.DBus.Deprecated": "true",
1141
1152
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1142
1153
"false"}
1143
1154
"""
1144
1155
1145
1156
def decorator(func):
1146
1157
func._dbus_is_interface = True
1147
1158
func._dbus_interface = dbus_interface
1148
1159
func._dbus_name = dbus_interface
1149
1160
return func
1150
1161
1151
1162
return decorator
1152
1163
1153
1164
1154
1165
def dbus_annotations(annotations):
1155
1166
"""Decorator to annotate D-Bus methods, signals or properties
1156
1167
Usage:
1157
1168
1158
1169
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1159
1170
"org.freedesktop.DBus.Property."
1160
1171
"EmitsChangedSignal": "false"})
1162
1173
access="r")
1163
1174
def Property_dbus_property(self):
1164
1175
return dbus.Boolean(False)
1165
1176
1166
1177
See also the DBusObjectWithAnnotations class.
1167
1178
"""
1168
1179
1169
1180
def decorator(func):
1170
1181
func._dbus_annotations = annotations
1171
1182
return func
1172
1183
1173
1184
return decorator
1174
1185
1175
1186
1193
1204
1194
1205
class DBusObjectWithAnnotations(dbus.service.Object):
1195
1206
"""A D-Bus object with annotations.
1196
1207
1197
1208
Classes inheriting from this can use the dbus_annotations
1198
1209
decorator to add annotations to methods or signals.
1199
1210
"""
1200
1211
1201
1212
@staticmethod
1202
1213
def _is_dbus_thing(thing):
1203
1214
"""Returns a function testing if an attribute is a D-Bus thing
1204
1215
1205
1216
If called like _is_dbus_thing("method") it returns a function
1206
1217
suitable for use as predicate to inspect.getmembers().
1207
1218
"""
1208
1219
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1209
1220
False)
1210
1221
1211
1222
def _get_all_dbus_things(self, thing):
1212
1223
"""Returns a generator of (name, attribute) pairs
1213
1224
"""
1216
1227
for cls in self.__class__.__mro__
1217
1228
for name, athing in
1218
1229
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1219
1230
1220
1231
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1221
out_signature = "s",
1222
path_keyword = 'object_path',
1223
connection_keyword = 'connection')
1232
out_signature="s",
1233
path_keyword='object_path',
1234
connection_keyword='connection')
1224
1235
def Introspect(self, object_path, connection):
1225
1236
"""Overloading of standard D-Bus method.
1226
1237
1227
1238
Inserts annotation tags on methods and signals.
1228
1239
"""
1229
1240
xmlstring = dbus.service.Object.Introspect(self, object_path,
1230
1241
connection)
1231
1242
try:
1232
1243
document = xml.dom.minidom.parseString(xmlstring)
1233
1244
1234
1245
for if_tag in document.getElementsByTagName("interface"):
1235
1246
# Add annotation tags
1236
1247
for typ in ("method", "signal"):
1263
1274
if_tag.appendChild(ann_tag)
1264
1275
# Fix argument name for the Introspect method itself
1265
1276
if (if_tag.getAttribute("name")
1266
== dbus.INTROSPECTABLE_IFACE):
1277
== dbus.INTROSPECTABLE_IFACE):
1267
1278
for cn in if_tag.getElementsByTagName("method"):
1268
1279
if cn.getAttribute("name") == "Introspect":
1269
1280
for arg in cn.getElementsByTagName("arg"):
1282
1293
1283
1294
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1284
1295
"""A D-Bus object with properties.
1285
1296
1286
1297
Classes inheriting from this can use the dbus_service_property
1287
1298
decorator to expose methods as D-Bus properties. It exposes the
1288
1299
standard Get(), Set(), and GetAll() methods on the D-Bus.
1289
1300
"""
1290
1301
1291
1302
def _get_dbus_property(self, interface_name, property_name):
1292
1303
"""Returns a bound method if one exists which is a D-Bus
1293
1304
property with the specified name and interface.
1298
1309
if (value._dbus_name == property_name
1299
1310
and value._dbus_interface == interface_name):
1300
1311
return value.__get__(self)
1301
1312
1302
1313
# No such property
1303
1314
raise DBusPropertyNotFound("{}:{}.{}".format(
1304
1315
self.dbus_object_path, interface_name, property_name))
1305
1316
1306
1317
@classmethod
1307
1318
def _get_all_interface_names(cls):
1308
1319
"""Get a sequence of all interfaces supported by an object"""
1311
1322
for x in (inspect.getmro(cls))
1312
1323
for attr in dir(x))
1313
1324
if name is not None)
1314
1325
1315
1326
@dbus.service.method(dbus.PROPERTIES_IFACE,
1316
1327
in_signature="ss",
1317
1328
out_signature="v")
1325
1336
if not hasattr(value, "variant_level"):
1326
1337
return value
1327
1338
return type(value)(value, variant_level=value.variant_level+1)
1328
1339
1329
1340
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1330
1341
def Set(self, interface_name, property_name, value):
1331
1342
"""Standard D-Bus property Set() method, see D-Bus standard.
1343
1354
value = dbus.ByteArray(b''.join(chr(byte)
1344
1355
for byte in value))
1345
1356
prop(value)
1346
1357
1347
1358
@dbus.service.method(dbus.PROPERTIES_IFACE,
1348
1359
in_signature="s",
1349
1360
out_signature="a{sv}")
1350
1361
def GetAll(self, interface_name):
1351
1362
"""Standard D-Bus property GetAll() method, see D-Bus
1352
1363
standard.
1353
1364
1354
1365
Note: Will not include properties with access="write".
1355
1366
"""
1356
1367
properties = {}
1367
1378
properties[name] = value
1368
1379
continue
1369
1380
properties[name] = type(value)(
1370
value, variant_level = value.variant_level + 1)
1381
value, variant_level=value.variant_level + 1)
1371
1382
return dbus.Dictionary(properties, signature="sv")
1372
1383
1373
1384
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1374
1385
def PropertiesChanged(self, interface_name, changed_properties,
1375
1386
invalidated_properties):
1377
1388
standard.
1378
1389
"""
1379
1390
pass
1380
1391
1381
1392
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1382
1393
out_signature="s",
1383
1394
path_keyword='object_path',
1384
1395
connection_keyword='connection')
1385
1396
def Introspect(self, object_path, connection):
1386
1397
"""Overloading of standard D-Bus method.
1387
1398
1388
1399
Inserts property tags and interface annotation tags.
1389
1400
"""
1390
1401
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1392
1403
connection)
1393
1404
try:
1394
1405
document = xml.dom.minidom.parseString(xmlstring)
1395
1406
1396
1407
def make_tag(document, name, prop):
1397
1408
e = document.createElement("property")
1398
1409
e.setAttribute("name", name)
1399
1410
e.setAttribute("type", prop._dbus_signature)
1400
1411
e.setAttribute("access", prop._dbus_access)
1401
1412
return e
1402
1413
1403
1414
for if_tag in document.getElementsByTagName("interface"):
1404
1415
# Add property tags
1405
1416
for tag in (make_tag(document, name, prop)
1452
1463
except AttributeError:
1453
1464
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1454
1465
1466
1455
1467
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1456
1468
"""A D-Bus object with an ObjectManager.
1457
1469
1458
1470
Classes inheriting from this exposes the standard
1459
1471
GetManagedObjects call and the InterfacesAdded and
1460
1472
InterfacesRemoved signals on the standard
1461
1473
"org.freedesktop.DBus.ObjectManager" interface.
1462
1474
1463
1475
Note: No signals are sent automatically; they must be sent
1464
1476
manually.
1465
1477
"""
1466
1478
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1467
out_signature = "a{oa{sa{sv}}}")
1479
out_signature="a{oa{sa{sv}}}")
1468
1480
def GetManagedObjects(self):
1469
1481
"""This function must be overridden"""
1470
1482
raise NotImplementedError()
1471
1483
1472
1484
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1473
signature = "oa{sa{sv}}")
1485
signature="oa{sa{sv}}")
1474
1486
def InterfacesAdded(self, object_path, interfaces_and_properties):
1475
1487
pass
1476
1477
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1488
1489
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1478
1490
def InterfacesRemoved(self, object_path, interfaces):
1479
1491
pass
1480
1492
1481
1493
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1482
out_signature = "s",
1483
path_keyword = 'object_path',
1484
connection_keyword = 'connection')
1494
out_signature="s",
1495
path_keyword='object_path',
1496
connection_keyword='connection')
1485
1497
def Introspect(self, object_path, connection):
1486
1498
"""Overloading of standard D-Bus method.
1487
1499
1488
1500
Override return argument name of GetManagedObjects to be
1489
1501
"objpath_interfaces_and_properties"
1490
1502
"""
1493
1505
connection)
1494
1506
try:
1495
1507
document = xml.dom.minidom.parseString(xmlstring)
1496
1508
1497
1509
for if_tag in document.getElementsByTagName("interface"):
1498
1510
# Fix argument name for the GetManagedObjects method
1499
1511
if (if_tag.getAttribute("name")
1500
== dbus.OBJECT_MANAGER_IFACE):
1512
== dbus.OBJECT_MANAGER_IFACE):
1501
1513
for cn in if_tag.getElementsByTagName("method"):
1502
1514
if (cn.getAttribute("name")
1503
1515
== "GetManagedObjects"):
1513
1525
except (AttributeError, xml.dom.DOMException,
1514
1526
xml.parsers.expat.ExpatError) as error:
1515
1527
logger.error("Failed to override Introspection method",
1516
exc_info = error)
1528
exc_info=error)
1517
1529
return xmlstring
1518
1530
1531
1519
1532
def datetime_to_dbus(dt, variant_level=0):
1520
1533
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1521
1534
if dt is None:
1522
return dbus.String("", variant_level = variant_level)
1535
return dbus.String("", variant_level=variant_level)
1523
1536
return dbus.String(dt.isoformat(), variant_level=variant_level)
1524
1537
1525
1538
1528
1541
dbus.service.Object, it will add alternate D-Bus attributes with
1529
1542
interface names according to the "alt_interface_names" mapping.
1530
1543
Usage:
1531
1544
1532
1545
@alternate_dbus_interfaces({"org.example.Interface":
1533
1546
"net.example.AlternateInterface"})
1534
1547
class SampleDBusObject(dbus.service.Object):
1535
1548
@dbus.service.method("org.example.Interface")
1536
1549
def SampleDBusMethod():
1537
1550
pass
1538
1551
1539
1552
The above "SampleDBusMethod" on "SampleDBusObject" will be
1540
1553
reachable via two interfaces: "org.example.Interface" and
1541
1554
"net.example.AlternateInterface", the latter of which will have
1542
1555
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1543
1556
"true", unless "deprecate" is passed with a False value.
1544
1557
1545
1558
This works for methods and signals, and also for D-Bus properties
1546
1559
(from DBusObjectWithProperties) and interfaces (from the
1547
1560
dbus_interface_annotations decorator).
1548
1561
"""
1549
1562
1550
1563
def wrapper(cls):
1551
1564
for orig_interface_name, alt_interface_name in (
1552
1565
alt_interface_names.items()):
1592
1605
attribute._dbus_annotations)
1593
1606
except AttributeError:
1594
1607
pass
1608
1595
1609
# Define a creator of a function to call both the
1596
1610
# original and alternate functions, so both the
1597
1611
# original and alternate signals gets sent when
1600
1614
"""This function is a scope container to pass
1601
1615
func1 and func2 to the "call_both" function
1602
1616
outside of its arguments"""
1603
1617
1604
1618
@functools.wraps(func2)
1605
1619
def call_both(*args, **kwargs):
1606
1620
"""This function will emit two D-Bus
1607
1621
signals by calling func1 and func2"""
1608
1622
func1(*args, **kwargs)
1609
1623
func2(*args, **kwargs)
1610
# Make wrapper function look like a D-Bus signal
1624
# Make wrapper function look like a D-Bus
1625
# signal
1611
1626
for name, attr in inspect.getmembers(func2):
1612
1627
if name.startswith("_dbus_"):
1613
1628
setattr(call_both, name, attr)
1614
1629
1615
1630
return call_both
1616
1631
# Create the "call_both" function and add it to
1617
1632
# the class
1663
1678
(copy_function(attribute)))
1664
1679
if deprecate:
1665
1680
# Deprecate all alternate interfaces
1666
iname="_AlternateDBusNames_interface_annotation{}"
1681
iname = "_AlternateDBusNames_interface_annotation{}"
1667
1682
for interface_name in interface_names:
1668
1683
1669
1684
@dbus_interface_annotations(interface_name)
1670
1685
def func(self):
1671
return { "org.freedesktop.DBus.Deprecated":
1672
"true" }
1686
return {"org.freedesktop.DBus.Deprecated":
1687
"true"}
1673
1688
# Find an unused name
1674
1689
for aname in (iname.format(i)
1675
1690
for i in itertools.count()):
1686
1701
cls = type("{}Alternate".format(cls.__name__),
1687
1702
(cls, ), attr)
1688
1703
return cls
1689
1704
1690
1705
return wrapper
1691
1706
1692
1707
1694
1709
"se.bsnet.fukt.Mandos"})
1695
1710
class ClientDBus(Client, DBusObjectWithProperties):
1696
1711
"""A Client class using D-Bus
1697
1712
1698
1713
Attributes:
1699
1714
dbus_object_path: dbus.ObjectPath
1700
1715
bus: dbus.SystemBus()
1701
1716
"""
1702
1717
1703
1718
runtime_expansions = (Client.runtime_expansions
1704
1719
+ ("dbus_object_path", ))
1705
1720
1706
1721
_interface = "se.recompile.Mandos.Client"
1707
1722
1708
1723
# dbus.service.Object doesn't use super(), so we can't either.
1709
1710
def __init__(self, bus = None, *args, **kwargs):
1724
1725
def __init__(self, bus=None, *args, **kwargs):
1711
1726
self.bus = bus
1712
1727
Client.__init__(self, *args, **kwargs)
1713
1728
# Only now, when this client is initialized, can it show up on
1719
1734
"/clients/" + client_object_name)
1720
1735
DBusObjectWithProperties.__init__(self, self.bus,
1721
1736
self.dbus_object_path)
1722
1737
1723
1738
def notifychangeproperty(transform_func, dbus_name,
1724
1739
type_func=lambda x: x,
1725
1740
variant_level=1,
1727
1742
_interface=_interface):
1728
1743
""" Modify a variable so that it's a property which announces
1729
1744
its changes to DBus.
1730
1745
1731
1746
transform_fun: Function that takes a value and a variant_level
1732
1747
and transforms it to a D-Bus type.
1733
1748
dbus_name: D-Bus name of the variable
1736
1751
variant_level: D-Bus variant level. Default: 1
1737
1752
"""
1738
1753
attrname = "_{}".format(dbus_name)
1739
1754
1740
1755
def setter(self, value):
1741
1756
if hasattr(self, "dbus_object_path"):
1742
1757
if (not hasattr(self, attrname) or
1749
1764
else:
1750
1765
dbus_value = transform_func(
1751
1766
type_func(value),
1752
variant_level = variant_level)
1767
variant_level=variant_level)
1753
1768
self.PropertyChanged(dbus.String(dbus_name),
1754
1769
dbus_value)
1755
1770
self.PropertiesChanged(
1756
1771
_interface,
1757
dbus.Dictionary({ dbus.String(dbus_name):
1758
dbus_value }),
1772
dbus.Dictionary({dbus.String(dbus_name):
1773
dbus_value}),
1759
1774
dbus.Array())
1760
1775
setattr(self, attrname, value)
1761
1776
1762
1777
return property(lambda self: getattr(self, attrname), setter)
1763
1778
1764
1779
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1765
1780
approvals_pending = notifychangeproperty(dbus.Boolean,
1766
1781
"ApprovalPending",
1767
type_func = bool)
1782
type_func=bool)
1768
1783
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1769
1784
last_enabled = notifychangeproperty(datetime_to_dbus,
1770
1785
"LastEnabled")
1771
1786
checker = notifychangeproperty(
1772
1787
dbus.Boolean, "CheckerRunning",
1773
type_func = lambda checker: checker is not None)
1788
type_func=lambda checker: checker is not None)
1774
1789
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1775
1790
"LastCheckedOK")
1776
1791
last_checker_status = notifychangeproperty(dbus.Int16,
1781
1796
"ApprovedByDefault")
1782
1797
approval_delay = notifychangeproperty(
1783
1798
dbus.UInt64, "ApprovalDelay",
1784
type_func = lambda td: td.total_seconds() * 1000)
1799
type_func=lambda td: td.total_seconds() * 1000)
1785
1800
approval_duration = notifychangeproperty(
1786
1801
dbus.UInt64, "ApprovalDuration",
1787
type_func = lambda td: td.total_seconds() * 1000)
1802
type_func=lambda td: td.total_seconds() * 1000)
1788
1803
host = notifychangeproperty(dbus.String, "Host")
1789
1804
timeout = notifychangeproperty(
1790
1805
dbus.UInt64, "Timeout",
1791
type_func = lambda td: td.total_seconds() * 1000)
1806
type_func=lambda td: td.total_seconds() * 1000)
1792
1807
extended_timeout = notifychangeproperty(
1793
1808
dbus.UInt64, "ExtendedTimeout",
1794
type_func = lambda td: td.total_seconds() * 1000)
1809
type_func=lambda td: td.total_seconds() * 1000)
1795
1810
interval = notifychangeproperty(
1796
1811
dbus.UInt64, "Interval",
1797
type_func = lambda td: td.total_seconds() * 1000)
1812
type_func=lambda td: td.total_seconds() * 1000)
1798
1813
checker_command = notifychangeproperty(dbus.String, "Checker")
1799
1814
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1800
1815
invalidate_only=True)
1801
1816
1802
1817
del notifychangeproperty
1803
1818
1804
1819
def __del__(self, *args, **kwargs):
1805
1820
try:
1806
1821
self.remove_from_connection()
1809
1824
if hasattr(DBusObjectWithProperties, "__del__"):
1810
1825
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1811
1826
Client.__del__(self, *args, **kwargs)
1812
1827
1813
1828
def checker_callback(self, source, condition,
1814
1829
connection, command, *args, **kwargs):
1815
1830
ret = Client.checker_callback(self, source, condition,
1831
1846
| self.last_checker_signal),
1832
1847
dbus.String(command))
1833
1848
return ret
1834
1849
1835
1850
def start_checker(self, *args, **kwargs):
1836
1851
old_checker_pid = getattr(self.checker, "pid", None)
1837
1852
r = Client.start_checker(self, *args, **kwargs)
1841
1856
# Emit D-Bus signal
1842
1857
self.CheckerStarted(self.current_checker_command)
1843
1858
return r
1844
1859
1845
1860
def _reset_approved(self):
1846
1861
self.approved = None
1847
1862
return False
1848
1863
1849
1864
def approve(self, value=True):
1850
1865
self.approved = value
1851
1866
GLib.timeout_add(int(self.approval_duration.total_seconds()
1852
1867
* 1000), self._reset_approved)
1853
1868
self.send_changedstate()
1854
1855
## D-Bus methods, signals & properties
1856
1857
## Interfaces
1858
1859
## Signals
1860
1869
1870
# D-Bus methods, signals & properties
1871
1872
# Interfaces
1873
1874
# Signals
1875
1861
1876
# CheckerCompleted - signal
1862
1877
@dbus.service.signal(_interface, signature="nxs")
1863
1878
def CheckerCompleted(self, exitcode, waitstatus, command):
1864
1879
"D-Bus signal"
1865
1880
pass
1866
1881
1867
1882
# CheckerStarted - signal
1868
1883
@dbus.service.signal(_interface, signature="s")
1869
1884
def CheckerStarted(self, command):
1870
1885
"D-Bus signal"
1871
1886
pass
1872
1887
1873
1888
# PropertyChanged - signal
1874
1889
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1875
1890
@dbus.service.signal(_interface, signature="sv")
1876
1891
def PropertyChanged(self, property, value):
1877
1892
"D-Bus signal"
1878
1893
pass
1879
1894
1880
1895
# GotSecret - signal
1881
1896
@dbus.service.signal(_interface)
1882
1897
def GotSecret(self):
1885
1900
server to mandos-client
1886
1901
"""
1887
1902
pass
1888
1903
1889
1904
# Rejected - signal
1890
1905
@dbus.service.signal(_interface, signature="s")
1891
1906
def Rejected(self, reason):
1892
1907
"D-Bus signal"
1893
1908
pass
1894
1909
1895
1910
# NeedApproval - signal
1896
1911
@dbus.service.signal(_interface, signature="tb")
1897
1912
def NeedApproval(self, timeout, default):
1898
1913
"D-Bus signal"
1899
1914
return self.need_approval()
1900
1901
## Methods
1902
1915
1916
# Methods
1917
1903
1918
# Approve - method
1904
1919
@dbus.service.method(_interface, in_signature="b")
1905
1920
def Approve(self, value):
1906
1921
self.approve(value)
1907
1922
1908
1923
# CheckedOK - method
1909
1924
@dbus.service.method(_interface)
1910
1925
def CheckedOK(self):
1911
1926
self.checked_ok()
1912
1927
1913
1928
# Enable - method
1914
1929
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1915
1930
@dbus.service.method(_interface)
1916
1931
def Enable(self):
1917
1932
"D-Bus method"
1918
1933
self.enable()
1919
1934
1920
1935
# StartChecker - method
1921
1936
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1922
1937
@dbus.service.method(_interface)
1923
1938
def StartChecker(self):
1924
1939
"D-Bus method"
1925
1940
self.start_checker()
1926
1941
1927
1942
# Disable - method
1928
1943
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1929
1944
@dbus.service.method(_interface)
1930
1945
def Disable(self):
1931
1946
"D-Bus method"
1932
1947
self.disable()
1933
1948
1934
1949
# StopChecker - method
1935
1950
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1936
1951
@dbus.service.method(_interface)
1937
1952
def StopChecker(self):
1938
1953
self.stop_checker()
1939
1940
## Properties
1941
1954
1955
# Properties
1956
1942
1957
# ApprovalPending - property
1943
1958
@dbus_service_property(_interface, signature="b", access="read")
1944
1959
def ApprovalPending_dbus_property(self):
1945
1960
return dbus.Boolean(bool(self.approvals_pending))
1946
1961
1947
1962
# ApprovedByDefault - property
1948
1963
@dbus_service_property(_interface,
1949
1964
signature="b",
1952
1967
if value is None: # get
1953
1968
return dbus.Boolean(self.approved_by_default)
1954
1969
self.approved_by_default = bool(value)
1955
1970
1956
1971
# ApprovalDelay - property
1957
1972
@dbus_service_property(_interface,
1958
1973
signature="t",
1962
1977
return dbus.UInt64(self.approval_delay.total_seconds()
1963
1978
* 1000)
1964
1979
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1965
1980
1966
1981
# ApprovalDuration - property
1967
1982
@dbus_service_property(_interface,
1968
1983
signature="t",
1972
1987
return dbus.UInt64(self.approval_duration.total_seconds()
1973
1988
* 1000)
1974
1989
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1975
1990
1976
1991
# Name - property
1977
1992
@dbus_annotations(
1978
1993
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1979
1994
@dbus_service_property(_interface, signature="s", access="read")
1980
1995
def Name_dbus_property(self):
1981
1996
return dbus.String(self.name)
1982
1997
1983
1998
# Fingerprint - property
1984
1999
@dbus_annotations(
1985
2000
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1986
2001
@dbus_service_property(_interface, signature="s", access="read")
1987
2002
def Fingerprint_dbus_property(self):
1988
2003
return dbus.String(self.fingerprint)
1989
2004
1990
2005
# Host - property
1991
2006
@dbus_service_property(_interface,
1992
2007
signature="s",
1995
2010
if value is None: # get
1996
2011
return dbus.String(self.host)
1997
2012
self.host = str(value)
1998
2013
1999
2014
# Created - property
2000
2015
@dbus_annotations(
2001
2016
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2002
2017
@dbus_service_property(_interface, signature="s", access="read")
2003
2018
def Created_dbus_property(self):
2004
2019
return datetime_to_dbus(self.created)
2005
2020
2006
2021
# LastEnabled - property
2007
2022
@dbus_service_property(_interface, signature="s", access="read")
2008
2023
def LastEnabled_dbus_property(self):
2009
2024
return datetime_to_dbus(self.last_enabled)
2010
2025
2011
2026
# Enabled - property
2012
2027
@dbus_service_property(_interface,
2013
2028
signature="b",
2019
2034
self.enable()
2020
2035
else:
2021
2036
self.disable()
2022
2037
2023
2038
# LastCheckedOK - property
2024
2039
@dbus_service_property(_interface,
2025
2040
signature="s",
2029
2044
self.checked_ok()
2030
2045
return
2031
2046
return datetime_to_dbus(self.last_checked_ok)
2032
2047
2033
2048
# LastCheckerStatus - property
2034
2049
@dbus_service_property(_interface, signature="n", access="read")
2035
2050
def LastCheckerStatus_dbus_property(self):
2036
2051
return dbus.Int16(self.last_checker_status)
2037
2052
2038
2053
# Expires - property
2039
2054
@dbus_service_property(_interface, signature="s", access="read")
2040
2055
def Expires_dbus_property(self):
2041
2056
return datetime_to_dbus(self.expires)
2042
2057
2043
2058
# LastApprovalRequest - property
2044
2059
@dbus_service_property(_interface, signature="s", access="read")
2045
2060
def LastApprovalRequest_dbus_property(self):
2046
2061
return datetime_to_dbus(self.last_approval_request)
2047
2062
2048
2063
# Timeout - property
2049
2064
@dbus_service_property(_interface,
2050
2065
signature="t",
2069
2084
self.disable_initiator_tag = GLib.timeout_add(
2070
2085
int((self.expires - now).total_seconds() * 1000),
2071
2086
self.disable)
2072
2087
2073
2088
# ExtendedTimeout - property
2074
2089
@dbus_service_property(_interface,
2075
2090
signature="t",
2079
2094
return dbus.UInt64(self.extended_timeout.total_seconds()
2080
2095
* 1000)
2081
2096
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2082
2097
2083
2098
# Interval - property
2084
2099
@dbus_service_property(_interface,
2085
2100
signature="t",
2095
2110
GLib.source_remove(self.checker_initiator_tag)
2096
2111
self.checker_initiator_tag = GLib.timeout_add(
2097
2112
value, self.start_checker)
2098
self.start_checker() # Start one now, too
2099
2113
self.start_checker() # Start one now, too
2114
2100
2115
# Checker - property
2101
2116
@dbus_service_property(_interface,
2102
2117
signature="s",
2105
2120
if value is None: # get
2106
2121
return dbus.String(self.checker_command)
2107
2122
self.checker_command = str(value)
2108
2123
2109
2124
# CheckerRunning - property
2110
2125
@dbus_service_property(_interface,
2111
2126
signature="b",
2117
2132
self.start_checker()
2118
2133
else:
2119
2134
self.stop_checker()
2120
2135
2121
2136
# ObjectPath - property
2122
2137
@dbus_annotations(
2123
2138
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2124
2139
"org.freedesktop.DBus.Deprecated": "true"})
2125
2140
@dbus_service_property(_interface, signature="o", access="read")
2126
2141
def ObjectPath_dbus_property(self):
2127
return self.dbus_object_path # is already a dbus.ObjectPath
2128
2142
return self.dbus_object_path # is already a dbus.ObjectPath
2143
2129
2144
# Secret = property
2130
2145
@dbus_annotations(
2131
2146
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2136
2151
byte_arrays=True)
2137
2152
def Secret_dbus_property(self, value):
2138
2153
self.secret = bytes(value)
2139
2154
2140
2155
del _interface
2141
2156
2142
2157
2146
2161
self._pipe.send(('init', fpr, address))
2147
2162
if not self._pipe.recv():
2148
2163
raise KeyError(fpr)
2149
2164
2150
2165
def __getattribute__(self, name):
2151
2166
if name == '_pipe':
2152
2167
return super(ProxyClient, self).__getattribute__(name)
2155
2170
if data[0] == 'data':
2156
2171
return data[1]
2157
2172
if data[0] == 'function':
2158
2173
2159
2174
def func(*args, **kwargs):
2160
2175
self._pipe.send(('funcall', name, args, kwargs))
2161
2176
return self._pipe.recv()[1]
2162
2177
2163
2178
return func
2164
2179
2165
2180
def __setattr__(self, name, value):
2166
2181
if name == '_pipe':
2167
2182
return super(ProxyClient, self).__setattr__(name, value)
2170
2185
2171
2186
class ClientHandler(socketserver.BaseRequestHandler, object):
2172
2187
"""A class to handle client connections.
2173
2188
2174
2189
Instantiated once for each connection to handle it.
2175
2190
Note: This will run in its own forked process."""
2176
2191
2177
2192
def handle(self):
2178
2193
with contextlib.closing(self.server.child_pipe) as child_pipe:
2179
2194
logger.info("TCP connection from: %s",
2180
2195
str(self.client_address))
2181
2196
logger.debug("Pipe FD: %d",
2182
2197
self.server.child_pipe.fileno())
2183
2198
2184
2199
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"))
2200
2201
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2202
# "+AES-256-CBC", "+SHA1",
2203
# "+COMP-NULL", "+CTYPE-OPENPGP",
2204
# "+DHE-DSS"))
2190
2205
# Use a fallback default, since this MUST be set.
2191
2206
priority = self.server.gnutls_priority
2192
2207
if priority is None:
2194
2209
gnutls.priority_set_direct(session._c_object,
2195
2210
priority.encode("utf-8"),
2196
2211
None)
2197
2212
2198
2213
# Start communication using the Mandos protocol
2199
2214
# Get protocol number
2200
2215
line = self.request.makefile().readline()
2205
2220
except (ValueError, IndexError, RuntimeError) as error:
2206
2221
logger.error("Unknown protocol version: %s", error)
2207
2222
return
2208
2223
2209
2224
# Start GnuTLS connection
2210
2225
try:
2211
2226
session.handshake()
2215
2230
# established. Just abandon the request.
2216
2231
return
2217
2232
logger.debug("Handshake succeeded")
2218
2233
2219
2234
approval_required = False
2220
2235
try:
2221
2236
try:
2225
2240
logger.warning("Bad certificate: %s", error)
2226
2241
return
2227
2242
logger.debug("Fingerprint: %s", fpr)
2228
2243
2229
2244
try:
2230
2245
client = ProxyClient(child_pipe, fpr,
2231
2246
self.client_address)
2232
2247
except KeyError:
2233
2248
return
2234
2249
2235
2250
if client.approval_delay:
2236
2251
delay = client.approval_delay
2237
2252
client.approvals_pending += 1
2238
2253
approval_required = True
2239
2254
2240
2255
while True:
2241
2256
if not client.enabled:
2242
2257
logger.info("Client %s is disabled",
2245
2260
# Emit D-Bus signal
2246
2261
client.Rejected("Disabled")
2247
2262
return
2248
2263
2249
2264
if client.approved or not client.approval_delay:
2250
#We are approved or approval is disabled
2265
# We are approved or approval is disabled
2251
2266
break
2252
2267
elif client.approved is None:
2253
2268
logger.info("Client %s needs approval",
2264
2279
# Emit D-Bus signal
2265
2280
client.Rejected("Denied")
2266
2281
return
2267
2268
#wait until timeout or approved
2282
2283
# wait until timeout or approved
2269
2284
time = datetime.datetime.now()
2270
2285
client.changedstate.acquire()
2271
2286
client.changedstate.wait(delay.total_seconds())
2284
2299
break
2285
2300
else:
2286
2301
delay -= time2 - time
2287
2302
2288
2303
try:
2289
2304
session.send(client.secret)
2290
2305
except gnutls.Error as error:
2291
2306
logger.warning("gnutls send failed",
2292
exc_info = error)
2307
exc_info=error)
2293
2308
return
2294
2309
2295
2310
logger.info("Sending secret to %s", client.name)
2296
2311
# bump the timeout using extended_timeout
2297
2312
client.bump_timeout(client.extended_timeout)
2298
2313
if self.server.use_dbus:
2299
2314
# Emit D-Bus signal
2300
2315
client.GotSecret()
2301
2316
2302
2317
finally:
2303
2318
if approval_required:
2304
2319
client.approvals_pending -= 1
2307
2322
except gnutls.Error as error:
2308
2323
logger.warning("GnuTLS bye failed",
2309
2324
exc_info=error)
2310
2325
2311
2326
@staticmethod
2312
2327
def peer_certificate(session):
2313
2328
"Return the peer's OpenPGP certificate as a bytestring"
2325
2340
return None
2326
2341
cert = cert_list[0]
2327
2342
return ctypes.string_at(cert.data, cert.size)
2328
2343
2329
2344
@staticmethod
2330
2345
def fingerprint(openpgp):
2331
2346
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2364
2379
2365
2380
class MultiprocessingMixIn(object):
2366
2381
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2367
2382
2368
2383
def sub_process_main(self, request, address):
2369
2384
try:
2370
2385
self.finish_request(request, address)
2371
2386
except Exception:
2372
2387
self.handle_error(request, address)
2373
2388
self.close_request(request)
2374
2389
2375
2390
def process_request(self, request, address):
2376
2391
"""Start a new process to process the request."""
2377
proc = multiprocessing.Process(target = self.sub_process_main,
2378
args = (request, address))
2392
proc = multiprocessing.Process(target=self.sub_process_main,
2393
args=(request, address))
2379
2394
proc.start()
2380
2395
return proc
2381
2396
2382
2397
2383
2398
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2384
2399
""" adds a pipe to the MixIn """
2385
2400
2386
2401
def process_request(self, request, client_address):
2387
2402
"""Overrides and wraps the original process_request().
2388
2403
2389
2404
This function creates a new pipe in self.pipe
2390
2405
"""
2391
2406
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2392
2407
2393
2408
proc = MultiprocessingMixIn.process_request(self, request,
2394
2409
client_address)
2395
2410
self.child_pipe.close()
2396
2411
self.add_pipe(parent_pipe, proc)
2397
2412
2398
2413
def add_pipe(self, parent_pipe, proc):
2399
2414
"""Dummy function; override as necessary"""
2400
2415
raise NotImplementedError()
2403
2418
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2404
2419
socketserver.TCPServer, object):
2405
2420
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2406
2421
2407
2422
Attributes:
2408
2423
enabled: Boolean; whether this server is activated yet
2409
2424
interface: None or a network interface name (string)
2410
2425
use_ipv6: Boolean; to use IPv6 or not
2411
2426
"""
2412
2427
2413
2428
def __init__(self, server_address, RequestHandlerClass,
2414
2429
interface=None,
2415
2430
use_ipv6=True,
2425
2440
self.socketfd = socketfd
2426
2441
# Save the original socket.socket() function
2427
2442
self.socket_socket = socket.socket
2443
2428
2444
# To implement --socket, we monkey patch socket.socket.
2429
#
2445
#
2430
2446
# (When socketserver.TCPServer is a new-style class, we
2431
2447
# could make self.socket into a property instead of monkey
2432
2448
# patching socket.socket.)
2433
#
2449
#
2434
2450
# Create a one-time-only replacement for socket.socket()
2435
2451
@functools.wraps(socket.socket)
2436
2452
def socket_wrapper(*args, **kwargs):
2448
2464
# socket_wrapper(), if socketfd was set.
2449
2465
socketserver.TCPServer.__init__(self, server_address,
2450
2466
RequestHandlerClass)
2451
2467
2452
2468
def server_bind(self):
2453
2469
"""This overrides the normal server_bind() function
2454
2470
to bind to an interface if one was specified, and also NOT to
2481
2497
if self.server_address[0] or self.server_address[1]:
2482
2498
if not self.server_address[0]:
2483
2499
if self.address_family == socket.AF_INET6:
2484
any_address = "::" # in6addr_any
2500
any_address = "::" # in6addr_any
2485
2501
else:
2486
any_address = "0.0.0.0" # INADDR_ANY
2502
any_address = "0.0.0.0" # INADDR_ANY
2487
2503
self.server_address = (any_address,
2488
2504
self.server_address[1])
2489
2505
elif not self.server_address[1]:
2499
2515
2500
2516
class MandosServer(IPv6_TCPServer):
2501
2517
"""Mandos server.
2502
2518
2503
2519
Attributes:
2504
2520
clients: set of Client objects
2505
2521
gnutls_priority GnuTLS priority string
2506
2522
use_dbus: Boolean; to emit D-Bus signals or not
2507
2523
2508
2524
Assumes a GLib.MainLoop event loop.
2509
2525
"""
2510
2526
2511
2527
def __init__(self, server_address, RequestHandlerClass,
2512
2528
interface=None,
2513
2529
use_ipv6=True,
2523
2539
self.gnutls_priority = gnutls_priority
2524
2540
IPv6_TCPServer.__init__(self, server_address,
2525
2541
RequestHandlerClass,
2526
interface = interface,
2527
use_ipv6 = use_ipv6,
2528
socketfd = socketfd)
2529
2542
interface=interface,
2543
use_ipv6=use_ipv6,
2544
socketfd=socketfd)
2545
2530
2546
def server_activate(self):
2531
2547
if self.enabled:
2532
2548
return socketserver.TCPServer.server_activate(self)
2533
2549
2534
2550
def enable(self):
2535
2551
self.enabled = True
2536
2552
2537
2553
def add_pipe(self, parent_pipe, proc):
2538
2554
# Call "handle_ipc" for both data and EOF events
2539
2555
GLib.io_add_watch(
2540
2556
parent_pipe.fileno(),
2541
2557
GLib.IO_IN | GLib.IO_HUP,
2542
2558
functools.partial(self.handle_ipc,
2543
parent_pipe = parent_pipe,
2544
proc = proc))
2545
2559
parent_pipe=parent_pipe,
2560
proc=proc))
2561
2546
2562
def handle_ipc(self, source, condition,
2547
2563
parent_pipe=None,
2548
proc = None,
2564
proc=None,
2549
2565
client_object=None):
2550
2566
# error, or the other end of multiprocessing.Pipe has closed
2551
2567
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2552
2568
# Wait for other process to exit
2553
2569
proc.join()
2554
2570
return False
2555
2571
2556
2572
# Read a request from the child
2557
2573
request = parent_pipe.recv()
2558
2574
command = request[0]
2559
2575
2560
2576
if command == 'init':
2561
2577
fpr = request[1]
2562
2578
address = request[2]
2563
2579
2564
2580
for c in self.clients.values():
2565
2581
if c.fingerprint == fpr:
2566
2582
client = c
2574
2590
address[0])
2575
2591
parent_pipe.send(False)
2576
2592
return False
2577
2593
2578
2594
GLib.io_add_watch(
2579
2595
parent_pipe.fileno(),
2580
2596
GLib.IO_IN | GLib.IO_HUP,
2581
2597
functools.partial(self.handle_ipc,
2582
parent_pipe = parent_pipe,
2583
proc = proc,
2584
client_object = client))
2598
parent_pipe=parent_pipe,
2599
proc=proc,
2600
client_object=client))
2585
2601
parent_pipe.send(True)
2586
2602
# remove the old hook in favor of the new above hook on
2587
2603
# same fileno
2590
2606
funcname = request[1]
2591
2607
args = request[2]
2592
2608
kwargs = request[3]
2593
2609
2594
2610
parent_pipe.send(('data', getattr(client_object,
2595
2611
funcname)(*args,
2596
2612
**kwargs)))
2597
2613
2598
2614
if command == 'getattr':
2599
2615
attrname = request[1]
2600
2616
if isinstance(client_object.__getattribute__(attrname),
2603
2619
else:
2604
2620
parent_pipe.send((
2605
2621
'data', client_object.__getattribute__(attrname)))
2606
2622
2607
2623
if command == 'setattr':
2608
2624
attrname = request[1]
2609
2625
value = request[2]
2610
2626
setattr(client_object, attrname, value)
2611
2627
2612
2628
return True
2613
2629
2614
2630
2615
2631
def rfc3339_duration_to_delta(duration):
2616
2632
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2617
2633
2618
2634
>>> rfc3339_duration_to_delta("P7D")
2619
2635
datetime.timedelta(7)
2620
2636
>>> rfc3339_duration_to_delta("PT60S")
2630
2646
>>> rfc3339_duration_to_delta("P1DT3M20S")
2631
2647
datetime.timedelta(1, 200)
2632
2648
"""
2633
2649
2634
2650
# Parsing an RFC 3339 duration with regular expressions is not
2635
2651
# possible - there would have to be multiple places for the same
2636
2652
# values, like seconds. The current code, while more esoteric, is
2637
2653
# cleaner without depending on a parsing library. If Python had a
2638
2654
# built-in library for parsing we would use it, but we'd like to
2639
2655
# avoid excessive use of external libraries.
2640
2656
2641
2657
# New type for defining tokens, syntax, and semantics all-in-one
2642
2658
Token = collections.namedtuple("Token", (
2643
2659
"regexp", # To match token; if "value" is not None, must have
2676
2692
frozenset((token_year, token_month,
2677
2693
token_day, token_time,
2678
2694
token_week)))
2679
# Define starting values
2680
value = datetime.timedelta() # Value so far
2695
# Define starting values:
2696
# Value so far
2697
value = datetime.timedelta()
2681
2698
found_token = None
2682
followers = frozenset((token_duration, )) # Following valid tokens
2683
s = duration # String left to parse
2699
# Following valid tokens
2700
followers = frozenset((token_duration, ))
2701
# String left to parse
2702
s = duration
2684
2703
# Loop until end token is found
2685
2704
while found_token is not token_end:
2686
2705
# Search for any currently valid tokens
2710
2729
2711
2730
def string_to_delta(interval):
2712
2731
"""Parse a string and return a datetime.timedelta
2713
2732
2714
2733
>>> string_to_delta('7d')
2715
2734
datetime.timedelta(7)
2716
2735
>>> string_to_delta('60s')
2724
2743
>>> string_to_delta('5m 30s')
2725
2744
datetime.timedelta(0, 330)
2726
2745
"""
2727
2746
2728
2747
try:
2729
2748
return rfc3339_duration_to_delta(interval)
2730
2749
except ValueError:
2731
2750
pass
2732
2751
2733
2752
timevalue = datetime.timedelta(0)
2734
2753
for s in interval.split():
2735
2754
try:
2753
2772
return timevalue
2754
2773
2755
2774
2756
def daemon(nochdir = False, noclose = False):
2775
def daemon(nochdir=False, noclose=False):
2757
2776
"""See daemon(3). Standard BSD Unix function.
2758
2777
2759
2778
This should really exist as os.daemon, but it doesn't (yet)."""
2760
2779
if os.fork():
2761
2780
sys.exit()
2779
2798
2780
2799
2781
2800
def main():
2782
2801
2783
2802
##################################################################
2784
2803
# Parsing of options, both command line and config file
2785
2804
2786
2805
parser = argparse.ArgumentParser()
2787
2806
parser.add_argument("-v", "--version", action="version",
2788
version = "%(prog)s {}".format(version),
2807
version="%(prog)s {}".format(version),
2789
2808
help="show version number and exit")
2790
2809
parser.add_argument("-i", "--interface", metavar="IF",
2791
2810
help="Bind to interface IF")
2827
2846
parser.add_argument("--no-zeroconf", action="store_false",
2828
2847
dest="zeroconf", help="Do not use Zeroconf",
2829
2848
default=None)
2830
2849
2831
2850
options = parser.parse_args()
2832
2851
2833
2852
if options.check:
2834
2853
import doctest
2835
2854
fail_count, test_count = doctest.testmod()
2836
2855
sys.exit(os.EX_OK if fail_count == 0 else 1)
2837
2856
2838
2857
# 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
2858
server_defaults = {"interface": "",
2859
"address": "",
2860
"port": "",
2861
"debug": "False",
2862
"priority":
2863
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2864
":+SIGN-DSA-SHA256",
2865
"servicename": "Mandos",
2866
"use_dbus": "True",
2867
"use_ipv6": "True",
2868
"debuglevel": "",
2869
"restore": "True",
2870
"socket": "",
2871
"statedir": "/var/lib/mandos",
2872
"foreground": "False",
2873
"zeroconf": "True",
2874
}
2875
2857
2876
# Parse config file for server-global settings
2858
2877
server_config = configparser.SafeConfigParser(server_defaults)
2859
2878
del server_defaults
2877
2896
server_settings["socket"] = os.dup(server_settings
2878
2897
["socket"])
2879
2898
del server_config
2880
2899
2881
2900
# Override the settings from the config file with command line
2882
2901
# options, if set.
2883
2902
for option in ("interface", "address", "port", "debug",
2901
2920
if server_settings["debug"]:
2902
2921
server_settings["foreground"] = True
2903
2922
# Now we have our good server settings in "server_settings"
2904
2923
2905
2924
##################################################################
2906
2925
2907
2926
if (not server_settings["zeroconf"]
2908
2927
and not (server_settings["port"]
2909
2928
or server_settings["socket"] != "")):
2910
2929
parser.error("Needs port or socket to work without Zeroconf")
2911
2930
2912
2931
# For convenience
2913
2932
debug = server_settings["debug"]
2914
2933
debuglevel = server_settings["debuglevel"]
2918
2937
stored_state_file)
2919
2938
foreground = server_settings["foreground"]
2920
2939
zeroconf = server_settings["zeroconf"]
2921
2940
2922
2941
if debug:
2923
2942
initlogger(debug, logging.DEBUG)
2924
2943
else:
2927
2946
else:
2928
2947
level = getattr(logging, debuglevel.upper())
2929
2948
initlogger(debug, level)
2930
2949
2931
2950
if server_settings["servicename"] != "Mandos":
2932
2951
syslogger.setFormatter(
2933
2952
logging.Formatter('Mandos ({}) [%(process)d]:'
2934
2953
' %(levelname)s: %(message)s'.format(
2935
2954
server_settings["servicename"])))
2936
2955
2937
2956
# Parse config file with clients
2938
2957
client_config = configparser.SafeConfigParser(Client
2939
2958
.client_defaults)
2940
2959
client_config.read(os.path.join(server_settings["configdir"],
2941
2960
"clients.conf"))
2942
2961
2943
2962
global mandos_dbus_service
2944
2963
mandos_dbus_service = None
2945
2964
2946
2965
socketfd = None
2947
2966
if server_settings["socket"] != "":
2948
2967
socketfd = server_settings["socket"]
2964
2983
except IOError as e:
2965
2984
logger.error("Could not open file %r", pidfilename,
2966
2985
exc_info=e)
2967
2986
2968
2987
for name, group in (("_mandos", "_mandos"),
2969
2988
("mandos", "mandos"),
2970
2989
("nobody", "nogroup")):
2988
3007
.format(uid, gid, os.strerror(error.errno)))
2989
3008
if error.errno != errno.EPERM:
2990
3009
raise
2991
3010
2992
3011
if debug:
2993
3012
# Enable all possible GnuTLS debugging
2994
3013
2995
3014
# "Use a log level over 10 to enable all debugging options."
2996
3015
# - GnuTLS manual
2997
3016
gnutls.global_set_log_level(11)
2998
3017
2999
3018
@gnutls.log_func
3000
3019
def debug_gnutls(level, string):
3001
3020
logger.debug("GnuTLS: %s", string[:-1])
3002
3021
3003
3022
gnutls.global_set_log_function(debug_gnutls)
3004
3023
3005
3024
# Redirect stdin so all checkers get /dev/null
3006
3025
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
3007
3026
os.dup2(null, sys.stdin.fileno())
3008
3027
if null > 2:
3009
3028
os.close(null)
3010
3029
3011
3030
# Need to fork before connecting to D-Bus
3012
3031
if not foreground:
3013
3032
# Close all input and output, do double fork, etc.
3014
3033
daemon()
3015
3034
3016
3035
# multiprocessing will use threads, so before we use GLib we need
3017
3036
# to inform GLib that threads will be used.
3018
3037
GLib.threads_init()
3019
3038
3020
3039
global main_loop
3021
3040
# From the Avahi example code
3022
3041
DBusGMainLoop(set_as_default=True)
3039
3058
if zeroconf:
3040
3059
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3041
3060
service = AvahiServiceToSyslog(
3042
name = server_settings["servicename"],
3043
servicetype = "_mandos._tcp",
3044
protocol = protocol,
3045
bus = bus)
3061
name=server_settings["servicename"],
3062
servicetype="_mandos._tcp",
3063
protocol=protocol,
3064
bus=bus)
3046
3065
if server_settings["interface"]:
3047
3066
service.interface = if_nametoindex(
3048
3067
server_settings["interface"].encode("utf-8"))
3049
3068
3050
3069
global multiprocessing_manager
3051
3070
multiprocessing_manager = multiprocessing.Manager()
3052
3071
3053
3072
client_class = Client
3054
3073
if use_dbus:
3055
client_class = functools.partial(ClientDBus, bus = bus)
3056
3074
client_class = functools.partial(ClientDBus, bus=bus)
3075
3057
3076
client_settings = Client.config_parser(client_config)
3058
3077
old_client_settings = {}
3059
3078
clients_data = {}
3060
3079
3061
3080
# This is used to redirect stdout and stderr for checker processes
3062
3081
global wnull
3063
wnull = open(os.devnull, "w") # A writable /dev/null
3082
wnull = open(os.devnull, "w") # A writable /dev/null
3064
3083
# Only used if server is running in foreground but not in debug
3065
3084
# mode
3066
3085
if debug or not foreground:
3067
3086
wnull.close()
3068
3087
3069
3088
# Get client data and settings from last running state.
3070
3089
if server_settings["restore"]:
3071
3090
try:
3072
3091
with open(stored_state_path, "rb") as stored_state:
3073
if sys.version_info.major == 2:
3092
if sys.version_info.major == 2:
3074
3093
clients_data, old_client_settings = pickle.load(
3075
3094
stored_state)
3076
3095
else:
3077
3096
bytes_clients_data, bytes_old_client_settings = (
3078
pickle.load(stored_state, encoding = "bytes"))
3079
### Fix bytes to strings
3080
## clients_data
3097
pickle.load(stored_state, encoding="bytes"))
3098
# Fix bytes to strings
3099
# clients_data
3081
3100
# .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() }
3101
clients_data = {(key.decode("utf-8")
3102
if isinstance(key, bytes)
3103
else key): value
3104
for key, value in
3105
bytes_clients_data.items()}
3087
3106
del bytes_clients_data
3088
3107
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() }
3108
value = {(k.decode("utf-8")
3109
if isinstance(k, bytes) else k): v
3110
for k, v in
3111
clients_data[key].items()}
3093
3112
clients_data[key] = value
3094
3113
# .client_structure
3095
3114
value["client_structure"] = [
3096
3115
(s.decode("utf-8")
3097
3116
if isinstance(s, bytes)
3098
3117
else s) for s in
3099
value["client_structure"] ]
3118
value["client_structure"]]
3100
3119
# .name & .host
3101
3120
for k in ("name", "host"):
3102
3121
if isinstance(value[k], bytes):
3103
3122
value[k] = value[k].decode("utf-8")
3104
## old_client_settings
3123
# old_client_settings
3105
3124
# .keys()
3106
3125
old_client_settings = {
3107
3126
(key.decode("utf-8")
3108
3127
if isinstance(key, bytes)
3109
3128
else key): value
3110
3129
for key, value in
3111
bytes_old_client_settings.items() }
3130
bytes_old_client_settings.items()}
3112
3131
del bytes_old_client_settings
3113
3132
# .host
3114
3133
for value in old_client_settings.values():
3128
3147
logger.warning("Could not load persistent state: "
3129
3148
"EOFError:",
3130
3149
exc_info=e)
3131
3150
3132
3151
with PGPEngine() as pgp:
3133
3152
for client_name, client in clients_data.items():
3134
3153
# Skip removed clients
3135
3154
if client_name not in client_settings:
3136
3155
continue
3137
3156
3138
3157
# Decide which value to use after restoring saved state.
3139
3158
# We have three different values: Old config file,
3140
3159
# new config file, and saved state.
3151
3170
client[name] = value
3152
3171
except KeyError:
3153
3172
pass
3154
3173
3155
3174
# Clients who has passed its expire date can still be
3156
3175
# enabled if its last checker was successful. A Client
3157
3176
# whose checker succeeded before we stored its state is
3190
3209
client_name))
3191
3210
client["secret"] = (client_settings[client_name]
3192
3211
["secret"])
3193
3212
3194
3213
# Add/remove clients based on new changes made to config
3195
3214
for client_name in (set(old_client_settings)
3196
3215
- set(client_settings)):
3198
3217
for client_name in (set(client_settings)
3199
3218
- set(old_client_settings)):
3200
3219
clients_data[client_name] = client_settings[client_name]
3201
3220
3202
3221
# Create all client objects
3203
3222
for client_name, client in clients_data.items():
3204
3223
tcp_server.clients[client_name] = client_class(
3205
name = client_name,
3206
settings = client,
3207
server_settings = server_settings)
3208
3224
name=client_name,
3225
settings=client,
3226
server_settings=server_settings)
3227
3209
3228
if not tcp_server.clients:
3210
3229
logger.warning("No clients defined")
3211
3230
3212
3231
if not foreground:
3213
3232
if pidfile is not None:
3214
3233
pid = os.getpid()
3220
3239
pidfilename, pid)
3221
3240
del pidfile
3222
3241
del pidfilename
3223
3242
3224
3243
for termsig in (signal.SIGHUP, signal.SIGTERM):
3225
3244
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3226
3245
lambda: main_loop.quit() and False)
3227
3246
3228
3247
if use_dbus:
3229
3248
3230
3249
@alternate_dbus_interfaces(
3231
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
3250
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3232
3251
class MandosDBusService(DBusObjectWithObjectManager):
3233
3252
"""A D-Bus proxy object"""
3234
3253
3235
3254
def __init__(self):
3236
3255
dbus.service.Object.__init__(self, bus, "/")
3237
3256
3238
3257
_interface = "se.recompile.Mandos"
3239
3258
3240
3259
@dbus.service.signal(_interface, signature="o")
3241
3260
def ClientAdded(self, objpath):
3242
3261
"D-Bus signal"
3243
3262
pass
3244
3263
3245
3264
@dbus.service.signal(_interface, signature="ss")
3246
3265
def ClientNotFound(self, fingerprint, address):
3247
3266
"D-Bus signal"
3248
3267
pass
3249
3268
3250
3269
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3251
3270
"true"})
3252
3271
@dbus.service.signal(_interface, signature="os")
3253
3272
def ClientRemoved(self, objpath, name):
3254
3273
"D-Bus signal"
3255
3274
pass
3256
3275
3257
3276
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3258
3277
"true"})
3259
3278
@dbus.service.method(_interface, out_signature="ao")
3261
3280
"D-Bus method"
3262
3281
return dbus.Array(c.dbus_object_path for c in
3263
3282
tcp_server.clients.values())
3264
3283
3265
3284
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3266
3285
"true"})
3267
3286
@dbus.service.method(_interface,
3269
3288
def GetAllClientsWithProperties(self):
3270
3289
"D-Bus method"
3271
3290
return dbus.Dictionary(
3272
{ c.dbus_object_path: c.GetAll(
3291
{c.dbus_object_path: c.GetAll(
3273
3292
"se.recompile.Mandos.Client")
3274
for c in tcp_server.clients.values() },
3293
for c in tcp_server.clients.values()},
3275
3294
signature="oa{sv}")
3276
3295
3277
3296
@dbus.service.method(_interface, in_signature="o")
3278
3297
def RemoveClient(self, object_path):
3279
3298
"D-Bus method"
3287
3306
self.client_removed_signal(c)
3288
3307
return
3289
3308
raise KeyError(object_path)
3290
3309
3291
3310
del _interface
3292
3311
3293
3312
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3294
out_signature = "a{oa{sa{sv}}}")
3313
out_signature="a{oa{sa{sv}}}")
3295
3314
def GetManagedObjects(self):
3296
3315
"""D-Bus method"""
3297
3316
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
3317
{client.dbus_object_path:
3318
dbus.Dictionary(
3319
{interface: client.GetAll(interface)
3320
for interface in
3321
client._get_all_interface_names()})
3322
for client in tcp_server.clients.values()})
3323
3305
3324
def client_added_signal(self, client):
3306
3325
"""Send the new standard signal and the old signal"""
3307
3326
if use_dbus:
3309
3328
self.InterfacesAdded(
3310
3329
client.dbus_object_path,
3311
3330
dbus.Dictionary(
3312
{ interface: client.GetAll(interface)
3313
for interface in
3314
client._get_all_interface_names()}))
3331
{interface: client.GetAll(interface)
3332
for interface in
3333
client._get_all_interface_names()}))
3315
3334
# Old signal
3316
3335
self.ClientAdded(client.dbus_object_path)
3317
3336
3318
3337
def client_removed_signal(self, client):
3319
3338
"""Send the new standard signal and the old signal"""
3320
3339
if use_dbus:
3325
3344
# Old signal
3326
3345
self.ClientRemoved(client.dbus_object_path,
3327
3346
client.name)
3328
3347
3329
3348
mandos_dbus_service = MandosDBusService()
3330
3349
3331
3350
# Save modules to variables to exempt the modules from being
3332
3351
# unloaded before the function registered with atexit() is run.
3333
3352
mp = multiprocessing
3334
3353
wn = wnull
3354
3335
3355
def cleanup():
3336
3356
"Cleanup function; run on exit"
3337
3357
if zeroconf:
3338
3358
service.cleanup()
3339
3359
3340
3360
mp.active_children()
3341
3361
wn.close()
3342
3362
if not (tcp_server.clients or client_settings):
3343
3363
return
3344
3364
3345
3365
# Store client before exiting. Secrets are encrypted with key
3346
3366
# based on what config file has. If config file is
3347
3367
# removed/edited, old secret will thus be unrecovable.
3352
3372
client.encrypted_secret = pgp.encrypt(client.secret,
3353
3373
key)
3354
3374
client_dict = {}
3355
3375
3356
3376
# A list of attributes that can not be pickled
3357
3377
# + secret.
3358
exclude = { "bus", "changedstate", "secret",
3359
"checker", "server_settings" }
3378
exclude = {"bus", "changedstate", "secret",
3379
"checker", "server_settings"}
3360
3380
for name, typ in inspect.getmembers(dbus.service
3361
3381
.Object):
3362
3382
exclude.add(name)
3363
3383
3364
3384
client_dict["encrypted_secret"] = (client
3365
3385
.encrypted_secret)
3366
3386
for attr in client.client_structure:
3367
3387
if attr not in exclude:
3368
3388
client_dict[attr] = getattr(client, attr)
3369
3389
3370
3390
clients[client.name] = client_dict
3371
3391
del client_settings[client.name]["secret"]
3372
3392
3373
3393
try:
3374
3394
with tempfile.NamedTemporaryFile(
3375
3395
mode='wb',
3378
3398
dir=os.path.dirname(stored_state_path),
3379
3399
delete=False) as stored_state:
3380
3400
pickle.dump((clients, client_settings), stored_state,
3381
protocol = 2)
3401
protocol=2)
3382
3402
tempname = stored_state.name
3383
3403
os.rename(tempname, stored_state_path)
3384
3404
except (IOError, OSError) as e:
3394
3414
logger.warning("Could not save persistent state:",
3395
3415
exc_info=e)
3396
3416
raise
3397
3417
3398
3418
# Delete all clients, and settings from config
3399
3419
while tcp_server.clients:
3400
3420
name, client = tcp_server.clients.popitem()
3406
3426
if use_dbus:
3407
3427
mandos_dbus_service.client_removed_signal(client)
3408
3428
client_settings.clear()
3409
3429
3410
3430
atexit.register(cleanup)
3411
3431
3412
3432
for client in tcp_server.clients.values():
3413
3433
if use_dbus:
3414
3434
# Emit D-Bus signal for adding
3416
3436
# Need to initiate checking of clients
3417
3437
if client.enabled:
3418
3438
client.init_checker()
3419
3439
3420
3440
tcp_server.enable()
3421
3441
tcp_server.server_activate()
3422
3442
3423
3443
# Find out what port we got
3424
3444
if zeroconf:
3425
3445
service.port = tcp_server.socket.getsockname()[1]
3430
3450
else: # IPv4
3431
3451
logger.info("Now listening on address %r, port %d",
3432
3452
*tcp_server.socket.getsockname())
3433
3434
#service.interface = tcp_server.socket.getsockname()[3]
3435
3453
3454
# service.interface = tcp_server.socket.getsockname()[3]
3455
3436
3456
try:
3437
3457
if zeroconf:
3438
3458
# From the Avahi example code
3443
3463
cleanup()
3444
3464
sys.exit(1)
3445
3465
# End of Avahi example code
3446
3466
3447
3467
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3448
3468
lambda *args, **kwargs:
3449
3469
(tcp_server.handle_request
3450
3470
(*args[2:], **kwargs) or True))
3451
3471
3452
3472
logger.debug("Starting main loop")
3453
3473
main_loop.run()
3454
3474
except AvahiError as error:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0