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# -*- mode: python; after-save-hook: (lambda () (let ((command (if (fboundp 'file-local-name) (file-local-name (buffer-file-name)) (or (file-remote-p (buffer-file-name) 'localname) (buffer-file-name))))) (if (= (progn (if (get-buffer "*Test*") (kill-buffer "*Test*")) (process-file-shell-command (format "%s --check" (shell-quote-argument command)) nil "*Test*")) 0) (let ((w (get-buffer-window "*Test*"))) (if w (delete-window w))) (progn (with-current-buffer "*Test*" (compilation-mode)) (display-buffer "*Test*" '(display-buffer-in-side-window)))))); coding: utf-8 -*-
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# -*- mode: python; coding: utf-8 -*-
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# Mandos server - give out binary blobs to connecting clients.
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# This program is partly derived from an example program for an Avahi
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# service publisher, downloaded from
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# <http://avahi.org/wiki/PythonPublishExample>. This includes the
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# methods "add", "remove", "server_state_changed",
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# "entry_group_state_changed", "cleanup", and "activate" in the
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# "AvahiService" class, and some lines in "main".
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# Everything else is
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# Copyright © 2008-2019 Teddy Hogeborn
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# Copyright © 2008-2019 Björn Påhlsson
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# This file is part of Mandos.
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# Mandos is free software: you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by
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# Copyright © 2008-2015 Teddy Hogeborn
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# Copyright © 2008-2015 Björn Påhlsson
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# Mandos is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
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# along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
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# Contact the authors at <mandos@recompile.se>.
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from __future__ import (division, absolute_import, print_function,
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from future_builtins import *
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from future_builtins import *
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import SocketServer as socketserver
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import dbus.service
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from gi.repository import GLib
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from gi.repository import GObject as gobject
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from dbus.mainloop.glib import DBusGMainLoop
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import xml.dom.minidom
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if sys.version_info.major == 2:
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# Add collections.abc.Callable if it does not exist
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collections.abc.Callable
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except AttributeError:
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Callable = collections.Callable
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collections.abc = abc
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# Add shlex.quote if it does not exist
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except AttributeError:
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shlex.quote = re.escape
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# Show warnings by default
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if not sys.warnoptions:
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warnings.simplefilter("default")
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# Try to find the value of SO_BINDTODEVICE:
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# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
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# newer, and it is also the most natural place for it:
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SO_BINDTODEVICE = socket.SO_BINDTODEVICE
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except AttributeError:
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# This is where SO_BINDTODEVICE was up to and including Python
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from IN import SO_BINDTODEVICE
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except ImportError:
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# In Python 2.7 it seems to have been removed entirely.
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# Try running the C preprocessor:
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cc = subprocess.Popen(["cc", "--language=c", "-E",
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE)
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stdout = cc.communicate(
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"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
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SO_BINDTODEVICE = int(stdout.splitlines()[-1])
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except (OSError, ValueError, IndexError):
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SO_BINDTODEVICE = None
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if sys.version_info < (3, 2):
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configparser.Configparser = configparser.SafeConfigParser
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SO_BINDTODEVICE = None
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if sys.version_info.major == 2:
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stored_state_file = "clients.pickle"
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logger = logging.getLogger()
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logging.captureWarnings(True) # Show warnings via the logging system
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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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.replace(b"\n", b"\\n")
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.replace(b"\0", b"\\x00"))
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def encrypt(self, data, password):
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passphrase = self.password_encode(password)
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with tempfile.NamedTemporaryFile(
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dir=self.tempdir) as passfile:
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passfile.write(passphrase)
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proc = subprocess.Popen([self.gpg, '--symmetric',
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proc = subprocess.Popen(['gpg', '--symmetric',
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'--passphrase-file',
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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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proc = subprocess.Popen([self.gpg, '--decrypt',
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proc = subprocess.Popen(['gpg', '--decrypt',
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'--passphrase-file',
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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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"""This isn't so much a class as it is a module-like namespace."""
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IF_UNSPEC = -1 # avahi-common/address.h
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PROTO_UNSPEC = -1 # avahi-common/address.h
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PROTO_INET = 0 # avahi-common/address.h
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PROTO_INET6 = 1 # avahi-common/address.h
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DBUS_NAME = "org.freedesktop.Avahi"
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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
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DBUS_PATH_SERVER = "/"
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def string_array_to_txt_array(t):
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return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
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for s in t), signature="ay")
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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
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SERVER_INVALID = 0 # avahi-common/defs.h
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SERVER_REGISTERING = 1 # avahi-common/defs.h
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SERVER_RUNNING = 2 # avahi-common/defs.h
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SERVER_COLLISION = 3 # avahi-common/defs.h
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SERVER_FAILURE = 4 # avahi-common/defs.h
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class AvahiError(Exception):
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def __init__(self, value, *args, **kwargs):
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self.value = value
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class AvahiServiceToSyslog(AvahiService):
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def rename(self, *args, **kwargs):
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"""Add the new name to the syslog messages"""
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ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
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ret = AvahiService.rename(self, *args, **kwargs)
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syslogger.setFormatter(logging.Formatter(
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'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
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.format(self.name)))
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# Pretend that we have a GnuTLS module
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"""This isn't so much a class as it is a module-like namespace."""
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library = ctypes.util.find_library("gnutls")
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library = ctypes.util.find_library("gnutls-deb0")
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_library = ctypes.cdll.LoadLibrary(library)
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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 = "3.3.0"
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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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E_INTERRUPTED = -52
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CRD_CERTIFICATE = 1
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E_NO_CERTIFICATE_FOUND = -49
561
KEYID_USE_SHA256 = 1 # gnutls/x509.h
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OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
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class session_int(ctypes.Structure):
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session_t = ctypes.POINTER(session_int)
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class certificate_credentials_st(ctypes.Structure):
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certificate_credentials_t = ctypes.POINTER(
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certificate_credentials_st)
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certificate_type_t = ctypes.c_int
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class datum_t(ctypes.Structure):
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_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
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('size', ctypes.c_uint)]
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class openpgp_crt_int(ctypes.Structure):
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openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
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openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
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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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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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484
class Error(Exception):
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def __init__(self, message=None, code=None, args=()):
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# We need to use the class name "GnuTLS" here, since this
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# exception might be raised from within GnuTLS.__init__,
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# which is called before the assignment to the "gnutls"
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# global variable has happened.
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def __init__(self, message = None, code = None, args=()):
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# Default usage is by a message string, but if a return
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# code is passed, convert it to a string with
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# gnutls.strerror()
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if message is None and code is not None:
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message = gnutls.strerror(code)
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return super(gnutls.Error, self).__init__(
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message = GnuTLS.strerror(code)
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return super(GnuTLS.Error, self).__init__(
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class CertificateSecurityError(Error):
503
class Credentials(object):
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def __init__(self):
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self._c_object = gnutls.certificate_credentials_t()
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gnutls.certificate_allocate_credentials(
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ctypes.byref(self._c_object))
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self.type = gnutls.CRD_CERTIFICATE
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def __del__(self):
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gnutls.certificate_free_credentials(self._c_object)
615
def __init__(self, socket, credentials=None):
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class ClientSession(object):
514
def __init__(self, socket, credentials = None):
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515
self._c_object = gnutls.session_t()
617
gnutls_flags = gnutls.CLIENT
618
if gnutls.check_version(b"3.5.6"):
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gnutls_flags |= gnutls.NO_TICKETS
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gnutls_flags |= gnutls.ENABLE_RAWPK
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gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
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gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
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gnutls.set_default_priority(self._c_object)
625
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gnutls.transport_set_ptr(self._c_object, socket.fileno())
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gnutls.handshake_set_private_extensions(self._c_object,
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return _error_code(result)
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result = func(*arguments)
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# Unless otherwise indicated, the function declarations below are
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# all from the gnutls/gnutls.h C header file.
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priority_set_direct = _library.gnutls_priority_set_direct
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priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
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ctypes.POINTER(ctypes.c_char_p)]
679
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priority_set_direct.restype = _error_code
681
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init = _library.gnutls_init
682
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init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
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init.restype = _error_code
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set_default_priority = _library.gnutls_set_default_priority
686
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set_default_priority.argtypes = [session_t]
687
580
set_default_priority.restype = _error_code
689
582
record_send = _library.gnutls_record_send
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583
record_send.argtypes = [session_t, ctypes.c_void_p,
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record_send.restype = ctypes.c_ssize_t
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record_send.errcheck = _retry_on_error
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certificate_allocate_credentials = (
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_library.gnutls_certificate_allocate_credentials)
697
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certificate_allocate_credentials.argtypes = [
698
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ctypes.POINTER(certificate_credentials_t)]
699
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certificate_allocate_credentials.restype = _error_code
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certificate_free_credentials = (
702
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_library.gnutls_certificate_free_credentials)
703
certificate_free_credentials.argtypes = [
704
certificate_credentials_t]
596
certificate_free_credentials.argtypes = [certificate_credentials_t]
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certificate_free_credentials.restype = None
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handshake_set_private_extensions = (
708
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_library.gnutls_handshake_set_private_extensions)
709
601
handshake_set_private_extensions.argtypes = [session_t,
711
603
handshake_set_private_extensions.restype = None
713
605
credentials_set = _library.gnutls_credentials_set
714
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credentials_set.argtypes = [session_t, credentials_type_t,
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credentials_set.restype = _error_code
718
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strerror = _library.gnutls_strerror
719
611
strerror.argtypes = [ctypes.c_int]
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strerror.restype = ctypes.c_char_p
722
614
certificate_type_get = _library.gnutls_certificate_type_get
723
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certificate_type_get.argtypes = [session_t]
724
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certificate_type_get.restype = _error_code
726
618
certificate_get_peers = _library.gnutls_certificate_get_peers
727
619
certificate_get_peers.argtypes = [session_t,
728
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ctypes.POINTER(ctypes.c_uint)]
729
621
certificate_get_peers.restype = ctypes.POINTER(datum_t)
731
623
global_set_log_level = _library.gnutls_global_set_log_level
732
624
global_set_log_level.argtypes = [ctypes.c_int]
733
625
global_set_log_level.restype = None
735
627
global_set_log_function = _library.gnutls_global_set_log_function
736
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global_set_log_function.argtypes = [log_func]
737
629
global_set_log_function.restype = None
739
631
deinit = _library.gnutls_deinit
740
632
deinit.argtypes = [session_t]
741
633
deinit.restype = None
743
635
handshake = _library.gnutls_handshake
744
636
handshake.argtypes = [session_t]
745
637
handshake.restype = _error_code
746
638
handshake.errcheck = _retry_on_error
748
640
transport_set_ptr = _library.gnutls_transport_set_ptr
749
641
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
750
642
transport_set_ptr.restype = None
752
644
bye = _library.gnutls_bye
753
645
bye.argtypes = [session_t, close_request_t]
754
646
bye.restype = _error_code
755
647
bye.errcheck = _retry_on_error
757
649
check_version = _library.gnutls_check_version
758
650
check_version.argtypes = [ctypes.c_char_p]
759
651
check_version.restype = ctypes.c_char_p
761
_need_version = b"3.3.0"
762
if check_version(_need_version) is None:
763
raise self.Error("Needs GnuTLS {} or later"
764
.format(_need_version))
766
_tls_rawpk_version = b"3.6.6"
767
has_rawpk = bool(check_version(_tls_rawpk_version))
771
class pubkey_st(ctypes.Structure):
773
pubkey_t = ctypes.POINTER(pubkey_st)
775
x509_crt_fmt_t = ctypes.c_int
777
# All the function declarations below are from gnutls/abstract.h
778
pubkey_init = _library.gnutls_pubkey_init
779
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
780
pubkey_init.restype = _error_code
782
pubkey_import = _library.gnutls_pubkey_import
783
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
785
pubkey_import.restype = _error_code
787
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
788
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
789
ctypes.POINTER(ctypes.c_ubyte),
790
ctypes.POINTER(ctypes.c_size_t)]
791
pubkey_get_key_id.restype = _error_code
793
pubkey_deinit = _library.gnutls_pubkey_deinit
794
pubkey_deinit.argtypes = [pubkey_t]
795
pubkey_deinit.restype = None
797
# All the function declarations below are from gnutls/openpgp.h
799
openpgp_crt_init = _library.gnutls_openpgp_crt_init
800
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
801
openpgp_crt_init.restype = _error_code
803
openpgp_crt_import = _library.gnutls_openpgp_crt_import
804
openpgp_crt_import.argtypes = [openpgp_crt_t,
805
ctypes.POINTER(datum_t),
807
openpgp_crt_import.restype = _error_code
809
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
810
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
811
ctypes.POINTER(ctypes.c_uint)]
812
openpgp_crt_verify_self.restype = _error_code
814
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
815
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
816
openpgp_crt_deinit.restype = None
818
openpgp_crt_get_fingerprint = (
819
_library.gnutls_openpgp_crt_get_fingerprint)
820
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
824
openpgp_crt_get_fingerprint.restype = _error_code
826
if check_version(b"3.6.4"):
827
certificate_type_get2 = _library.gnutls_certificate_type_get2
828
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
829
certificate_type_get2.restype = _error_code
653
# All the function declarations below are from gnutls/openpgp.h
655
openpgp_crt_init = _library.gnutls_openpgp_crt_init
656
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
657
openpgp_crt_init.restype = _error_code
659
openpgp_crt_import = _library.gnutls_openpgp_crt_import
660
openpgp_crt_import.argtypes = [openpgp_crt_t,
661
ctypes.POINTER(datum_t),
663
openpgp_crt_import.restype = _error_code
665
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
666
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
667
ctypes.POINTER(ctypes.c_uint)]
668
openpgp_crt_verify_self.restype = _error_code
670
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
671
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
672
openpgp_crt_deinit.restype = None
674
openpgp_crt_get_fingerprint = (
675
_library.gnutls_openpgp_crt_get_fingerprint)
676
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
680
openpgp_crt_get_fingerprint.restype = _error_code
831
682
# Remove non-public functions
832
683
del _error_code, _retry_on_error
684
# Create the global "gnutls" object, simulating a module
835
687
def call_pipe(connection, # : multiprocessing.Connection
836
688
func, *args, **kwargs):
837
689
"""This function is meant to be called by multiprocessing.Process
839
691
This function runs func(*args, **kwargs), and writes the resulting
840
692
return value on the provided multiprocessing.Connection.
842
694
connection.send(func(*args, **kwargs))
843
695
connection.close()
697
class Client(object):
847
698
"""A representation of a client host served by this server.
850
701
approved: bool(); 'None' if not yet approved/disapproved
851
702
approval_delay: datetime.timedelta(); Time to wait for approval
852
703
approval_duration: datetime.timedelta(); Duration of one approval
853
checker: multiprocessing.Process(); a running checker process used
854
to see if the client lives. 'None' if no process is
856
checker_callback_tag: a GLib event source tag, or None
704
checker: subprocess.Popen(); a running checker process used
705
to see if the client lives.
706
'None' if no process is running.
707
checker_callback_tag: a gobject event source tag, or None
857
708
checker_command: string; External command which is run to check
858
709
if client lives. %() expansions are done at
859
710
runtime with vars(self) as dict, so that for
860
711
instance %(name)s can be used in the command.
861
checker_initiator_tag: a GLib event source tag, or None
712
checker_initiator_tag: a gobject event source tag, or None
862
713
created: datetime.datetime(); (UTC) object creation
863
714
client_structure: Object describing what attributes a client has
864
715
and is used for storing the client at exit
865
716
current_checker_command: string; current running checker_command
866
disable_initiator_tag: a GLib event source tag, or None
717
disable_initiator_tag: a gobject event source tag, or None
868
719
fingerprint: string (40 or 32 hexadecimal digits); used to
869
uniquely identify an OpenPGP client
870
key_id: string (64 hexadecimal digits); used to uniquely identify
871
a client using raw public keys
720
uniquely identify the client
872
721
host: string; available for use by the checker command
873
722
interval: datetime.timedelta(); How often to start a new checker
874
723
last_approval_request: datetime.datetime(); (UTC) or None
1031
875
logger.info("Disabling client %s", self.name)
1032
876
if getattr(self, "disable_initiator_tag", None) is not None:
1033
GLib.source_remove(self.disable_initiator_tag)
877
gobject.source_remove(self.disable_initiator_tag)
1034
878
self.disable_initiator_tag = None
1035
879
self.expires = None
1036
880
if getattr(self, "checker_initiator_tag", None) is not None:
1037
GLib.source_remove(self.checker_initiator_tag)
881
gobject.source_remove(self.checker_initiator_tag)
1038
882
self.checker_initiator_tag = None
1039
883
self.stop_checker()
1040
884
self.enabled = False
1042
886
self.send_changedstate()
1043
# Do not run this again if called by a GLib.timeout_add
887
# Do not run this again if called by a gobject.timeout_add
1046
890
def __del__(self):
1049
893
def init_checker(self):
1050
894
# Schedule a new checker to be started an 'interval' from now,
1051
895
# and every interval from then on.
1052
896
if self.checker_initiator_tag is not None:
1053
GLib.source_remove(self.checker_initiator_tag)
1054
self.checker_initiator_tag = GLib.timeout_add(
1055
random.randrange(int(self.interval.total_seconds() * 1000
897
gobject.source_remove(self.checker_initiator_tag)
898
self.checker_initiator_tag = gobject.timeout_add(
899
int(self.interval.total_seconds() * 1000),
1057
900
self.start_checker)
1058
901
# Schedule a disable() when 'timeout' has passed
1059
902
if self.disable_initiator_tag is not None:
1060
GLib.source_remove(self.disable_initiator_tag)
1061
self.disable_initiator_tag = GLib.timeout_add(
903
gobject.source_remove(self.disable_initiator_tag)
904
self.disable_initiator_tag = gobject.timeout_add(
1062
905
int(self.timeout.total_seconds() * 1000), self.disable)
1063
906
# Also start a new checker *right now*.
1064
907
self.start_checker()
1066
909
def checker_callback(self, source, condition, connection,
1068
911
"""The checker has completed, so take appropriate actions."""
912
self.checker_callback_tag = None
1069
914
# Read return code from connection (see call_pipe)
1070
915
returncode = connection.recv()
1071
916
connection.close()
1072
if self.checker is not None:
1074
self.checker_callback_tag = None
1077
918
if returncode >= 0:
1078
919
self.last_checker_status = returncode
1079
920
self.last_checker_signal = None
1535
1376
exc_info=error)
1536
1377
return xmlstring
1540
1380
dbus.OBJECT_MANAGER_IFACE
1541
1381
except AttributeError:
1542
1382
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1545
1384
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1546
1385
"""A D-Bus object with an ObjectManager.
1548
1387
Classes inheriting from this exposes the standard
1549
1388
GetManagedObjects call and the InterfacesAdded and
1550
1389
InterfacesRemoved signals on the standard
1551
1390
"org.freedesktop.DBus.ObjectManager" interface.
1553
1392
Note: No signals are sent automatically; they must be sent
1556
1395
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1557
out_signature="a{oa{sa{sv}}}")
1396
out_signature = "a{oa{sa{sv}}}")
1558
1397
def GetManagedObjects(self):
1559
1398
"""This function must be overridden"""
1560
1399
raise NotImplementedError()
1562
1401
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1563
signature="oa{sa{sv}}")
1402
signature = "oa{sa{sv}}")
1564
1403
def InterfacesAdded(self, object_path, interfaces_and_properties):
1567
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1406
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1568
1407
def InterfacesRemoved(self, object_path, interfaces):
1571
1410
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1573
path_keyword='object_path',
1574
connection_keyword='connection')
1411
out_signature = "s",
1412
path_keyword = 'object_path',
1413
connection_keyword = 'connection')
1575
1414
def Introspect(self, object_path, connection):
1576
1415
"""Overloading of standard D-Bus method.
1578
1417
Override return argument name of GetManagedObjects to be
1579
1418
"objpath_interfaces_and_properties"
2522
class MultiprocessingMixIn:
2312
class MultiprocessingMixIn(object):
2523
2313
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2525
2315
def sub_process_main(self, request, address):
2527
2317
self.finish_request(request, address)
2528
2318
except Exception:
2529
2319
self.handle_error(request, address)
2530
2320
self.close_request(request)
2532
2322
def process_request(self, request, address):
2533
2323
"""Start a new process to process the request."""
2534
proc = multiprocessing.Process(target=self.sub_process_main,
2535
args=(request, address))
2324
proc = multiprocessing.Process(target = self.sub_process_main,
2325
args = (request, address))
2540
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
2330
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2541
2331
""" adds a pipe to the MixIn """
2543
2333
def process_request(self, request, client_address):
2544
2334
"""Overrides and wraps the original process_request().
2546
2336
This function creates a new pipe in self.pipe
2548
2338
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2550
2340
proc = MultiprocessingMixIn.process_request(self, request,
2551
2341
client_address)
2552
2342
self.child_pipe.close()
2553
2343
self.add_pipe(parent_pipe, proc)
2555
2345
def add_pipe(self, parent_pipe, proc):
2556
2346
"""Dummy function; override as necessary"""
2557
2347
raise NotImplementedError()
2560
2350
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2561
socketserver.TCPServer):
2351
socketserver.TCPServer, object):
2562
2352
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2565
2355
enabled: Boolean; whether this server is activated yet
2566
2356
interface: None or a network interface name (string)
2567
2357
use_ipv6: Boolean; to use IPv6 or not
2570
2360
def __init__(self, server_address, RequestHandlerClass,
2571
2361
interface=None,
2606
2395
# socket_wrapper(), if socketfd was set.
2607
2396
socketserver.TCPServer.__init__(self, server_address,
2608
2397
RequestHandlerClass)
2610
2399
def server_bind(self):
2611
2400
"""This overrides the normal server_bind() function
2612
2401
to bind to an interface if one was specified, and also NOT to
2613
2402
bind to an address or port if they were not specified."""
2614
global SO_BINDTODEVICE
2615
2403
if self.interface is not None:
2616
2404
if SO_BINDTODEVICE is None:
2617
# Fall back to a hard-coded value which seems to be
2619
logger.warning("SO_BINDTODEVICE not found, trying 25")
2620
SO_BINDTODEVICE = 25
2622
self.socket.setsockopt(
2623
socket.SOL_SOCKET, SO_BINDTODEVICE,
2624
(self.interface + "\0").encode("utf-8"))
2625
except socket.error as error:
2626
if error.errno == errno.EPERM:
2627
logger.error("No permission to bind to"
2628
" interface %s", self.interface)
2629
elif error.errno == errno.ENOPROTOOPT:
2630
logger.error("SO_BINDTODEVICE not available;"
2631
" cannot bind to interface %s",
2633
elif error.errno == errno.ENODEV:
2634
logger.error("Interface %s does not exist,"
2635
" cannot bind", self.interface)
2405
logger.error("SO_BINDTODEVICE does not exist;"
2406
" cannot bind to interface %s",
2410
self.socket.setsockopt(
2411
socket.SOL_SOCKET, SO_BINDTODEVICE,
2412
(self.interface + "\0").encode("utf-8"))
2413
except socket.error as error:
2414
if error.errno == errno.EPERM:
2415
logger.error("No permission to bind to"
2416
" interface %s", self.interface)
2417
elif error.errno == errno.ENOPROTOOPT:
2418
logger.error("SO_BINDTODEVICE not available;"
2419
" cannot bind to interface %s",
2421
elif error.errno == errno.ENODEV:
2422
logger.error("Interface %s does not exist,"
2423
" cannot bind", self.interface)
2638
2426
# Only bind(2) the socket if we really need to.
2639
2427
if self.server_address[0] or self.server_address[1]:
2640
if self.server_address[1]:
2641
self.allow_reuse_address = True
2642
2428
if not self.server_address[0]:
2643
2429
if self.address_family == socket.AF_INET6:
2644
any_address = "::" # in6addr_any
2430
any_address = "::" # in6addr_any
2646
any_address = "0.0.0.0" # INADDR_ANY
2432
any_address = "0.0.0.0" # INADDR_ANY
2647
2433
self.server_address = (any_address,
2648
2434
self.server_address[1])
2649
2435
elif not self.server_address[1]:
2683
2469
self.gnutls_priority = gnutls_priority
2684
2470
IPv6_TCPServer.__init__(self, server_address,
2685
2471
RequestHandlerClass,
2686
interface=interface,
2472
interface = interface,
2473
use_ipv6 = use_ipv6,
2474
socketfd = socketfd)
2690
2476
def server_activate(self):
2691
2477
if self.enabled:
2692
2478
return socketserver.TCPServer.server_activate(self)
2694
2480
def enable(self):
2695
2481
self.enabled = True
2697
2483
def add_pipe(self, parent_pipe, proc):
2698
2484
# Call "handle_ipc" for both data and EOF events
2700
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2701
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2485
gobject.io_add_watch(
2486
parent_pipe.fileno(),
2487
gobject.IO_IN | gobject.IO_HUP,
2702
2488
functools.partial(self.handle_ipc,
2703
parent_pipe=parent_pipe,
2489
parent_pipe = parent_pipe,
2706
2492
def handle_ipc(self, source, condition,
2707
2493
parent_pipe=None,
2709
2495
client_object=None):
2710
2496
# error, or the other end of multiprocessing.Pipe has closed
2711
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2497
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2712
2498
# Wait for other process to exit
2716
2502
# Read a request from the child
2717
2503
request = parent_pipe.recv()
2718
2504
command = request[0]
2720
2506
if command == 'init':
2721
key_id = request[1].decode("ascii")
2722
fpr = request[2].decode("ascii")
2723
address = request[3]
2725
for c in self.clients.values():
2726
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2728
if key_id and c.key_id == key_id:
2731
if fpr and c.fingerprint == fpr:
2508
address = request[2]
2510
for c in self.clients.itervalues():
2511
if c.fingerprint == fpr:
2735
logger.info("Client not found for key ID: %s, address"
2736
": %s", key_id or fpr, address)
2515
logger.info("Client not found for fingerprint: %s, ad"
2516
"dress: %s", fpr, address)
2737
2517
if self.use_dbus:
2738
2518
# Emit D-Bus signal
2739
mandos_dbus_service.ClientNotFound(key_id or fpr,
2519
mandos_dbus_service.ClientNotFound(fpr,
2741
2521
parent_pipe.send(False)
2745
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2746
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2524
gobject.io_add_watch(
2525
parent_pipe.fileno(),
2526
gobject.IO_IN | gobject.IO_HUP,
2747
2527
functools.partial(self.handle_ipc,
2748
parent_pipe=parent_pipe,
2750
client_object=client))
2528
parent_pipe = parent_pipe,
2530
client_object = client))
2751
2531
parent_pipe.send(True)
2752
2532
# remove the old hook in favor of the new above hook on
2756
2536
funcname = request[1]
2757
2537
args = request[2]
2758
2538
kwargs = request[3]
2760
2540
parent_pipe.send(('data', getattr(client_object,
2761
2541
funcname)(*args,
2764
2544
if command == 'getattr':
2765
2545
attrname = request[1]
2766
2546
if isinstance(client_object.__getattribute__(attrname),
2767
collections.abc.Callable):
2547
collections.Callable):
2768
2548
parent_pipe.send(('function', ))
2770
2550
parent_pipe.send((
2771
2551
'data', client_object.__getattribute__(attrname)))
2773
2553
if command == 'setattr':
2774
2554
attrname = request[1]
2775
2555
value = request[2]
2776
2556
setattr(client_object, attrname, value)
2781
2561
def rfc3339_duration_to_delta(duration):
2782
2562
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2784
>>> rfc3339_duration_to_delta("P7D") == datetime.timedelta(7)
2786
>>> rfc3339_duration_to_delta("PT60S") == datetime.timedelta(0, 60)
2788
>>> rfc3339_duration_to_delta("PT60M") == datetime.timedelta(0, 3600)
2790
>>> rfc3339_duration_to_delta("PT24H") == datetime.timedelta(1)
2792
>>> rfc3339_duration_to_delta("P1W") == datetime.timedelta(7)
2794
>>> rfc3339_duration_to_delta("PT5M30S") == datetime.timedelta(0, 330)
2796
>>> rfc3339_duration_to_delta("P1DT3M20S") == datetime.timedelta(1, 200)
2564
>>> rfc3339_duration_to_delta("P7D")
2565
datetime.timedelta(7)
2566
>>> rfc3339_duration_to_delta("PT60S")
2567
datetime.timedelta(0, 60)
2568
>>> rfc3339_duration_to_delta("PT60M")
2569
datetime.timedelta(0, 3600)
2570
>>> rfc3339_duration_to_delta("PT24H")
2571
datetime.timedelta(1)
2572
>>> rfc3339_duration_to_delta("P1W")
2573
datetime.timedelta(7)
2574
>>> rfc3339_duration_to_delta("PT5M30S")
2575
datetime.timedelta(0, 330)
2576
>>> rfc3339_duration_to_delta("P1DT3M20S")
2577
datetime.timedelta(1, 200)
2800
2580
# Parsing an RFC 3339 duration with regular expressions is not
2801
2581
# possible - there would have to be multiple places for the same
2802
2582
# values, like seconds. The current code, while more esoteric, is
2803
2583
# cleaner without depending on a parsing library. If Python had a
2804
2584
# built-in library for parsing we would use it, but we'd like to
2805
2585
# avoid excessive use of external libraries.
2807
2587
# New type for defining tokens, syntax, and semantics all-in-one
2808
2588
Token = collections.namedtuple("Token", (
2809
2589
"regexp", # To match token; if "value" is not None, must have
2996
2773
parser.add_argument("--no-zeroconf", action="store_false",
2997
2774
dest="zeroconf", help="Do not use Zeroconf",
3000
2777
options = parser.parse_args()
2781
fail_count, test_count = doctest.testmod()
2782
sys.exit(os.EX_OK if fail_count == 0 else 1)
3002
2784
# Default values for config file for server-global settings
3003
if gnutls.has_rawpk:
3004
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
3005
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
3007
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
3008
":+SIGN-DSA-SHA256")
3009
server_defaults = {"interface": "",
3013
"priority": priority,
3014
"servicename": "Mandos",
3020
"statedir": "/var/lib/mandos",
3021
"foreground": "False",
2785
server_defaults = { "interface": "",
2790
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2791
":+SIGN-DSA-SHA256",
2792
"servicename": "Mandos",
2798
"statedir": "/var/lib/mandos",
2799
"foreground": "False",
3026
2803
# Parse config file for server-global settings
3027
server_config = configparser.ConfigParser(server_defaults)
2804
server_config = configparser.SafeConfigParser(server_defaults)
3028
2805
del server_defaults
3029
2806
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3030
# Convert the ConfigParser object to a dict
2807
# Convert the SafeConfigParser object to a dict
3031
2808
server_settings = server_config.defaults()
3032
2809
# Use the appropriate methods on the non-string config options
3033
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3034
"foreground", "zeroconf"):
2810
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
3035
2811
server_settings[option] = server_config.getboolean("DEFAULT",
3037
2813
if server_settings["port"]:
3210
2979
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3211
2980
service = AvahiServiceToSyslog(
3212
name=server_settings["servicename"],
3213
servicetype="_mandos._tcp",
2981
name = server_settings["servicename"],
2982
servicetype = "_mandos._tcp",
2983
protocol = protocol,
3216
2985
if server_settings["interface"]:
3217
2986
service.interface = if_nametoindex(
3218
2987
server_settings["interface"].encode("utf-8"))
3220
2989
global multiprocessing_manager
3221
2990
multiprocessing_manager = multiprocessing.Manager()
3223
2992
client_class = Client
3225
client_class = functools.partial(ClientDBus, bus=bus)
2994
client_class = functools.partial(ClientDBus, bus = bus)
3227
2996
client_settings = Client.config_parser(client_config)
3228
2997
old_client_settings = {}
3229
2998
clients_data = {}
3231
3000
# This is used to redirect stdout and stderr for checker processes
3233
wnull = open(os.devnull, "w") # A writable /dev/null
3002
wnull = open(os.devnull, "w") # A writable /dev/null
3234
3003
# Only used if server is running in foreground but not in debug
3236
3005
if debug or not foreground:
3239
3008
# Get client data and settings from last running state.
3240
3009
if server_settings["restore"]:
3242
3011
with open(stored_state_path, "rb") as stored_state:
3243
if sys.version_info.major == 2:
3244
clients_data, old_client_settings = pickle.load(
3247
bytes_clients_data, bytes_old_client_settings = (
3248
pickle.load(stored_state, encoding="bytes"))
3249
# Fix bytes to strings
3252
clients_data = {(key.decode("utf-8")
3253
if isinstance(key, bytes)
3256
bytes_clients_data.items()}
3257
del bytes_clients_data
3258
for key in clients_data:
3259
value = {(k.decode("utf-8")
3260
if isinstance(k, bytes) else k): v
3262
clients_data[key].items()}
3263
clients_data[key] = value
3265
value["client_structure"] = [
3267
if isinstance(s, bytes)
3269
value["client_structure"]]
3270
# .name, .host, and .checker_command
3271
for k in ("name", "host", "checker_command"):
3272
if isinstance(value[k], bytes):
3273
value[k] = value[k].decode("utf-8")
3274
if "key_id" not in value:
3275
value["key_id"] = ""
3276
elif "fingerprint" not in value:
3277
value["fingerprint"] = ""
3278
# old_client_settings
3280
old_client_settings = {
3281
(key.decode("utf-8")
3282
if isinstance(key, bytes)
3285
bytes_old_client_settings.items()}
3286
del bytes_old_client_settings
3287
# .host and .checker_command
3288
for value in old_client_settings.values():
3289
for attribute in ("host", "checker_command"):
3290
if isinstance(value[attribute], bytes):
3291
value[attribute] = (value[attribute]
3012
clients_data, old_client_settings = pickle.load(
3293
3014
os.remove(stored_state_path)
3294
3015
except IOError as e:
3295
3016
if e.errno == errno.ENOENT:
3395
3116
pidfilename, pid)
3397
3118
del pidfilename
3399
for termsig in (signal.SIGHUP, signal.SIGTERM):
3400
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3401
lambda: main_loop.quit() and False)
3120
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
3121
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3405
3125
@alternate_dbus_interfaces(
3406
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3126
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
3407
3127
class MandosDBusService(DBusObjectWithObjectManager):
3408
3128
"""A D-Bus proxy object"""
3410
3130
def __init__(self):
3411
3131
dbus.service.Object.__init__(self, bus, "/")
3413
3133
_interface = "se.recompile.Mandos"
3415
3135
@dbus.service.signal(_interface, signature="o")
3416
3136
def ClientAdded(self, objpath):
3420
3140
@dbus.service.signal(_interface, signature="ss")
3421
def ClientNotFound(self, key_id, address):
3141
def ClientNotFound(self, fingerprint, address):
3425
3145
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3427
3147
@dbus.service.signal(_interface, signature="os")
3428
3148
def ClientRemoved(self, objpath, name):
3432
3152
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3434
3154
@dbus.service.method(_interface, out_signature="ao")
3435
3155
def GetAllClients(self):
3437
3157
return dbus.Array(c.dbus_object_path for c in
3438
tcp_server.clients.values())
3158
tcp_server.clients.itervalues())
3440
3160
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3442
3162
@dbus.service.method(_interface,