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# -*- mode: python; coding: utf-8 -*-
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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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# 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 © 2008-2016 Teddy Hogeborn
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# Copyright © 2008-2016 Björn Påhlsson
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# Copyright © 2008-2019 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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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# Mandos is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
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# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
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# Contact the authors at <mandos@recompile.se>.
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from __future__ import (division, absolute_import, print_function,
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from future_builtins import *
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from future_builtins import *
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import SocketServer as socketserver
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import dbus.service
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from gi.repository import GObject
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import gobject as GObject
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from gi.repository import GLib
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from dbus.mainloop.glib import DBusGMainLoop
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import xml.dom.minidom
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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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SO_BINDTODEVICE = None
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if sys.version_info.major == 2:
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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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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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'--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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'--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 = AvahiService.rename(self, *args, **kwargs)
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ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
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syslogger.setFormatter(logging.Formatter(
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'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
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.format(self.name)))
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# 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 = "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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"""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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# 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
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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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transport_ptr_t = ctypes.c_void_p
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close_request_t = ctypes.c_int
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class Error(Exception):
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# We need to use the class name "GnuTLS" here, since this
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# exception might be raised from within GnuTLS.__init__,
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# which is called before the assignment to the "gnutls"
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# global variable has happened.
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def __init__(self, message = None, code = None, args=()):
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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):
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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)
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class ClientSession(object):
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def __init__(self, socket, credentials = None):
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def __init__(self, socket, credentials=None):
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self._c_object = gnutls.session_t()
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gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
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gnutls_flags = gnutls.CLIENT
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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.set_default_priority(self._c_object)
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gnutls.transport_set_ptr(self._c_object, socket.fileno())
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gnutls.handshake_set_private_extensions(self._c_object,
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return _error_code(result)
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result = func(*arguments)
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# Unless otherwise indicated, the function declarations below are
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# all from the gnutls/gnutls.h C header file.
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priority_set_direct = _library.gnutls_priority_set_direct
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priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
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ctypes.POINTER(ctypes.c_char_p)]
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priority_set_direct.restype = _error_code
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init = _library.gnutls_init
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init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
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init.restype = _error_code
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set_default_priority = _library.gnutls_set_default_priority
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set_default_priority.argtypes = [session_t]
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set_default_priority.restype = _error_code
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record_send = _library.gnutls_record_send
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record_send.argtypes = [session_t, ctypes.c_void_p,
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record_send.restype = ctypes.c_ssize_t
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record_send.errcheck = _retry_on_error
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certificate_allocate_credentials = (
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_library.gnutls_certificate_allocate_credentials)
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certificate_allocate_credentials.argtypes = [
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ctypes.POINTER(certificate_credentials_t)]
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certificate_allocate_credentials.restype = _error_code
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certificate_free_credentials = (
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_library.gnutls_certificate_free_credentials)
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certificate_free_credentials.argtypes = [certificate_credentials_t]
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certificate_free_credentials.argtypes = [
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certificate_credentials_t]
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certificate_free_credentials.restype = None
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handshake_set_private_extensions = (
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_library.gnutls_handshake_set_private_extensions)
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handshake_set_private_extensions.argtypes = [session_t,
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handshake_set_private_extensions.restype = None
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credentials_set = _library.gnutls_credentials_set
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credentials_set.argtypes = [session_t, credentials_type_t,
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credentials_set.restype = _error_code
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strerror = _library.gnutls_strerror
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strerror.argtypes = [ctypes.c_int]
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strerror.restype = ctypes.c_char_p
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certificate_type_get = _library.gnutls_certificate_type_get
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certificate_type_get.argtypes = [session_t]
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certificate_type_get.restype = _error_code
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certificate_get_peers = _library.gnutls_certificate_get_peers
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certificate_get_peers.argtypes = [session_t,
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ctypes.POINTER(ctypes.c_uint)]
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certificate_get_peers.restype = ctypes.POINTER(datum_t)
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global_set_log_level = _library.gnutls_global_set_log_level
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global_set_log_level.argtypes = [ctypes.c_int]
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global_set_log_level.restype = None
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global_set_log_function = _library.gnutls_global_set_log_function
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global_set_log_function.argtypes = [log_func]
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global_set_log_function.restype = None
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deinit = _library.gnutls_deinit
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deinit.argtypes = [session_t]
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deinit.restype = None
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handshake = _library.gnutls_handshake
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handshake.argtypes = [session_t]
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handshake.restype = _error_code
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handshake.errcheck = _retry_on_error
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transport_set_ptr = _library.gnutls_transport_set_ptr
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transport_set_ptr.argtypes = [session_t, transport_ptr_t]
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transport_set_ptr.restype = None
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bye = _library.gnutls_bye
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bye.argtypes = [session_t, close_request_t]
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bye.restype = _error_code
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bye.errcheck = _retry_on_error
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check_version = _library.gnutls_check_version
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check_version.argtypes = [ctypes.c_char_p]
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check_version.restype = ctypes.c_char_p
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# All the function declarations below are from gnutls/openpgp.h
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openpgp_crt_init = _library.gnutls_openpgp_crt_init
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openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
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openpgp_crt_init.restype = _error_code
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openpgp_crt_import = _library.gnutls_openpgp_crt_import
671
openpgp_crt_import.argtypes = [openpgp_crt_t,
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ctypes.POINTER(datum_t),
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openpgp_crt_import.restype = _error_code
676
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
677
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
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ctypes.POINTER(ctypes.c_uint)]
679
openpgp_crt_verify_self.restype = _error_code
681
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
682
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
683
openpgp_crt_deinit.restype = None
685
openpgp_crt_get_fingerprint = (
686
_library.gnutls_openpgp_crt_get_fingerprint)
687
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
691
openpgp_crt_get_fingerprint.restype = _error_code
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
693
831
# Remove non-public functions
694
832
del _error_code, _retry_on_error
695
# Create the global "gnutls" object, simulating a module
698
835
def call_pipe(connection, # : multiprocessing.Connection
699
836
func, *args, **kwargs):
700
837
"""This function is meant to be called by multiprocessing.Process
702
839
This function runs func(*args, **kwargs), and writes the resulting
703
840
return value on the provided multiprocessing.Connection.
705
842
connection.send(func(*args, **kwargs))
706
843
connection.close()
708
class Client(object):
709
847
"""A representation of a client host served by this server.
712
850
approved: bool(); 'None' if not yet approved/disapproved
713
851
approval_delay: datetime.timedelta(); Time to wait for approval
714
852
approval_duration: datetime.timedelta(); Duration of one approval
715
checker: subprocess.Popen(); a running checker process used
716
to see if the client lives.
717
'None' if no process is running.
718
checker_callback_tag: a GObject event source tag, or None
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
719
857
checker_command: string; External command which is run to check
720
858
if client lives. %() expansions are done at
721
859
runtime with vars(self) as dict, so that for
722
860
instance %(name)s can be used in the command.
723
checker_initiator_tag: a GObject event source tag, or None
861
checker_initiator_tag: a GLib event source tag, or None
724
862
created: datetime.datetime(); (UTC) object creation
725
863
client_structure: Object describing what attributes a client has
726
864
and is used for storing the client at exit
727
865
current_checker_command: string; current running checker_command
728
disable_initiator_tag: a GObject event source tag, or None
866
disable_initiator_tag: a GLib event source tag, or None
730
868
fingerprint: string (40 or 32 hexadecimal digits); used to
731
uniquely identify the client
869
uniquely identify an OpenPGP client
870
key_id: string (64 hexadecimal digits); used to uniquely identify
871
a client using raw public keys
732
872
host: string; available for use by the checker command
733
873
interval: datetime.timedelta(); How often to start a new checker
734
874
last_approval_request: datetime.datetime(); (UTC) or None
886
1031
logger.info("Disabling client %s", self.name)
887
1032
if getattr(self, "disable_initiator_tag", None) is not None:
888
GObject.source_remove(self.disable_initiator_tag)
1033
GLib.source_remove(self.disable_initiator_tag)
889
1034
self.disable_initiator_tag = None
890
1035
self.expires = None
891
1036
if getattr(self, "checker_initiator_tag", None) is not None:
892
GObject.source_remove(self.checker_initiator_tag)
1037
GLib.source_remove(self.checker_initiator_tag)
893
1038
self.checker_initiator_tag = None
894
1039
self.stop_checker()
895
1040
self.enabled = False
897
1042
self.send_changedstate()
898
# Do not run this again if called by a GObject.timeout_add
1043
# Do not run this again if called by a GLib.timeout_add
901
1046
def __del__(self):
904
1049
def init_checker(self):
905
1050
# Schedule a new checker to be started an 'interval' from now,
906
1051
# and every interval from then on.
907
1052
if self.checker_initiator_tag is not None:
908
GObject.source_remove(self.checker_initiator_tag)
909
self.checker_initiator_tag = GObject.timeout_add(
910
int(self.interval.total_seconds() * 1000),
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
911
1057
self.start_checker)
912
1058
# Schedule a disable() when 'timeout' has passed
913
1059
if self.disable_initiator_tag is not None:
914
GObject.source_remove(self.disable_initiator_tag)
915
self.disable_initiator_tag = GObject.timeout_add(
1060
GLib.source_remove(self.disable_initiator_tag)
1061
self.disable_initiator_tag = GLib.timeout_add(
916
1062
int(self.timeout.total_seconds() * 1000), self.disable)
917
1063
# Also start a new checker *right now*.
918
1064
self.start_checker()
920
1066
def checker_callback(self, source, condition, connection,
922
1068
"""The checker has completed, so take appropriate actions."""
923
self.checker_callback_tag = None
925
1069
# Read return code from connection (see call_pipe)
926
1070
returncode = connection.recv()
927
1071
connection.close()
1072
if self.checker is not None:
1074
self.checker_callback_tag = None
929
1077
if returncode >= 0:
930
1078
self.last_checker_status = returncode
931
1079
self.last_checker_signal = None
1387
1535
exc_info=error)
1388
1536
return xmlstring
1391
1540
dbus.OBJECT_MANAGER_IFACE
1392
1541
except AttributeError:
1393
1542
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1395
1545
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1396
1546
"""A D-Bus object with an ObjectManager.
1398
1548
Classes inheriting from this exposes the standard
1399
1549
GetManagedObjects call and the InterfacesAdded and
1400
1550
InterfacesRemoved signals on the standard
1401
1551
"org.freedesktop.DBus.ObjectManager" interface.
1403
1553
Note: No signals are sent automatically; they must be sent
1406
1556
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1407
out_signature = "a{oa{sa{sv}}}")
1557
out_signature="a{oa{sa{sv}}}")
1408
1558
def GetManagedObjects(self):
1409
1559
"""This function must be overridden"""
1410
1560
raise NotImplementedError()
1412
1562
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1413
signature = "oa{sa{sv}}")
1563
signature="oa{sa{sv}}")
1414
1564
def InterfacesAdded(self, object_path, interfaces_and_properties):
1417
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1567
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1418
1568
def InterfacesRemoved(self, object_path, interfaces):
1421
1571
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1422
out_signature = "s",
1423
path_keyword = 'object_path',
1424
connection_keyword = 'connection')
1573
path_keyword='object_path',
1574
connection_keyword='connection')
1425
1575
def Introspect(self, object_path, connection):
1426
1576
"""Overloading of standard D-Bus method.
1428
1578
Override return argument name of GetManagedObjects to be
1429
1579
"objpath_interfaces_and_properties"
2323
class MultiprocessingMixIn(object):
2522
class MultiprocessingMixIn:
2324
2523
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2326
2525
def sub_process_main(self, request, address):
2328
2527
self.finish_request(request, address)
2329
2528
except Exception:
2330
2529
self.handle_error(request, address)
2331
2530
self.close_request(request)
2333
2532
def process_request(self, request, address):
2334
2533
"""Start a new process to process the request."""
2335
proc = multiprocessing.Process(target = self.sub_process_main,
2336
args = (request, address))
2534
proc = multiprocessing.Process(target=self.sub_process_main,
2535
args=(request, address))
2341
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2540
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
2342
2541
""" adds a pipe to the MixIn """
2344
2543
def process_request(self, request, client_address):
2345
2544
"""Overrides and wraps the original process_request().
2347
2546
This function creates a new pipe in self.pipe
2349
2548
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2351
2550
proc = MultiprocessingMixIn.process_request(self, request,
2352
2551
client_address)
2353
2552
self.child_pipe.close()
2354
2553
self.add_pipe(parent_pipe, proc)
2356
2555
def add_pipe(self, parent_pipe, proc):
2357
2556
"""Dummy function; override as necessary"""
2358
2557
raise NotImplementedError()
2361
2560
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2362
socketserver.TCPServer, object):
2561
socketserver.TCPServer):
2363
2562
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2366
2565
enabled: Boolean; whether this server is activated yet
2367
2566
interface: None or a network interface name (string)
2368
2567
use_ipv6: Boolean; to use IPv6 or not
2371
2570
def __init__(self, server_address, RequestHandlerClass,
2372
2571
interface=None,
2406
2606
# socket_wrapper(), if socketfd was set.
2407
2607
socketserver.TCPServer.__init__(self, server_address,
2408
2608
RequestHandlerClass)
2410
2610
def server_bind(self):
2411
2611
"""This overrides the normal server_bind() function
2412
2612
to bind to an interface if one was specified, and also NOT to
2413
2613
bind to an address or port if they were not specified."""
2614
global SO_BINDTODEVICE
2414
2615
if self.interface is not None:
2415
2616
if SO_BINDTODEVICE is None:
2416
logger.error("SO_BINDTODEVICE does not exist;"
2417
" cannot bind to interface %s",
2421
self.socket.setsockopt(
2422
socket.SOL_SOCKET, SO_BINDTODEVICE,
2423
(self.interface + "\0").encode("utf-8"))
2424
except socket.error as error:
2425
if error.errno == errno.EPERM:
2426
logger.error("No permission to bind to"
2427
" interface %s", self.interface)
2428
elif error.errno == errno.ENOPROTOOPT:
2429
logger.error("SO_BINDTODEVICE not available;"
2430
" cannot bind to interface %s",
2432
elif error.errno == errno.ENODEV:
2433
logger.error("Interface %s does not exist,"
2434
" cannot bind", self.interface)
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)
2437
2638
# Only bind(2) the socket if we really need to.
2438
2639
if self.server_address[0] or self.server_address[1]:
2640
if self.server_address[1]:
2641
self.allow_reuse_address = True
2439
2642
if not self.server_address[0]:
2440
2643
if self.address_family == socket.AF_INET6:
2441
any_address = "::" # in6addr_any
2644
any_address = "::" # in6addr_any
2443
any_address = "0.0.0.0" # INADDR_ANY
2646
any_address = "0.0.0.0" # INADDR_ANY
2444
2647
self.server_address = (any_address,
2445
2648
self.server_address[1])
2446
2649
elif not self.server_address[1]:
2480
2683
self.gnutls_priority = gnutls_priority
2481
2684
IPv6_TCPServer.__init__(self, server_address,
2482
2685
RequestHandlerClass,
2483
interface = interface,
2484
use_ipv6 = use_ipv6,
2485
socketfd = socketfd)
2686
interface=interface,
2487
2690
def server_activate(self):
2488
2691
if self.enabled:
2489
2692
return socketserver.TCPServer.server_activate(self)
2491
2694
def enable(self):
2492
2695
self.enabled = True
2494
2697
def add_pipe(self, parent_pipe, proc):
2495
2698
# Call "handle_ipc" for both data and EOF events
2496
GObject.io_add_watch(
2497
parent_pipe.fileno(),
2498
GObject.IO_IN | GObject.IO_HUP,
2700
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2701
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2499
2702
functools.partial(self.handle_ipc,
2500
parent_pipe = parent_pipe,
2703
parent_pipe=parent_pipe,
2503
2706
def handle_ipc(self, source, condition,
2504
2707
parent_pipe=None,
2506
2709
client_object=None):
2507
2710
# error, or the other end of multiprocessing.Pipe has closed
2508
if condition & (GObject.IO_ERR | GObject.IO_HUP):
2711
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2509
2712
# Wait for other process to exit
2513
2716
# Read a request from the child
2514
2717
request = parent_pipe.recv()
2515
2718
command = request[0]
2517
2720
if command == 'init':
2519
address = request[2]
2521
for c in self.clients.itervalues():
2522
if c.fingerprint == fpr:
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:
2526
logger.info("Client not found for fingerprint: %s, ad"
2527
"dress: %s", fpr, address)
2735
logger.info("Client not found for key ID: %s, address"
2736
": %s", key_id or fpr, address)
2528
2737
if self.use_dbus:
2529
2738
# Emit D-Bus signal
2530
mandos_dbus_service.ClientNotFound(fpr,
2739
mandos_dbus_service.ClientNotFound(key_id or fpr,
2532
2741
parent_pipe.send(False)
2535
GObject.io_add_watch(
2536
parent_pipe.fileno(),
2537
GObject.IO_IN | GObject.IO_HUP,
2745
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2746
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2538
2747
functools.partial(self.handle_ipc,
2539
parent_pipe = parent_pipe,
2541
client_object = client))
2748
parent_pipe=parent_pipe,
2750
client_object=client))
2542
2751
parent_pipe.send(True)
2543
2752
# remove the old hook in favor of the new above hook on
2547
2756
funcname = request[1]
2548
2757
args = request[2]
2549
2758
kwargs = request[3]
2551
2760
parent_pipe.send(('data', getattr(client_object,
2552
2761
funcname)(*args,
2555
2764
if command == 'getattr':
2556
2765
attrname = request[1]
2557
2766
if isinstance(client_object.__getattribute__(attrname),
2558
collections.Callable):
2767
collections.abc.Callable):
2559
2768
parent_pipe.send(('function', ))
2561
2770
parent_pipe.send((
2562
2771
'data', client_object.__getattribute__(attrname)))
2564
2773
if command == 'setattr':
2565
2774
attrname = request[1]
2566
2775
value = request[2]
2567
2776
setattr(client_object, attrname, value)
2572
2781
def rfc3339_duration_to_delta(duration):
2573
2782
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2575
>>> rfc3339_duration_to_delta("P7D")
2576
datetime.timedelta(7)
2577
>>> rfc3339_duration_to_delta("PT60S")
2578
datetime.timedelta(0, 60)
2579
>>> rfc3339_duration_to_delta("PT60M")
2580
datetime.timedelta(0, 3600)
2581
>>> rfc3339_duration_to_delta("PT24H")
2582
datetime.timedelta(1)
2583
>>> rfc3339_duration_to_delta("P1W")
2584
datetime.timedelta(7)
2585
>>> rfc3339_duration_to_delta("PT5M30S")
2586
datetime.timedelta(0, 330)
2587
>>> rfc3339_duration_to_delta("P1DT3M20S")
2588
datetime.timedelta(1, 200)
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)
2591
2800
# Parsing an RFC 3339 duration with regular expressions is not
2592
2801
# possible - there would have to be multiple places for the same
2593
2802
# values, like seconds. The current code, while more esoteric, is
2594
2803
# cleaner without depending on a parsing library. If Python had a
2595
2804
# built-in library for parsing we would use it, but we'd like to
2596
2805
# avoid excessive use of external libraries.
2598
2807
# New type for defining tokens, syntax, and semantics all-in-one
2599
2808
Token = collections.namedtuple("Token", (
2600
2809
"regexp", # To match token; if "value" is not None, must have
2784
2996
parser.add_argument("--no-zeroconf", action="store_false",
2785
2997
dest="zeroconf", help="Do not use Zeroconf",
2788
3000
options = parser.parse_args()
2792
fail_count, test_count = doctest.testmod()
2793
sys.exit(os.EX_OK if fail_count == 0 else 1)
2795
3002
# Default values for config file for server-global settings
2796
server_defaults = { "interface": "",
2801
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2802
":+SIGN-DSA-SHA256",
2803
"servicename": "Mandos",
2809
"statedir": "/var/lib/mandos",
2810
"foreground": "False",
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",
2814
3026
# Parse config file for server-global settings
2815
server_config = configparser.SafeConfigParser(server_defaults)
3027
server_config = configparser.ConfigParser(server_defaults)
2816
3028
del server_defaults
2817
3029
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2818
# Convert the SafeConfigParser object to a dict
3030
# Convert the ConfigParser object to a dict
2819
3031
server_settings = server_config.defaults()
2820
3032
# Use the appropriate methods on the non-string config options
2821
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
3033
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3034
"foreground", "zeroconf"):
2822
3035
server_settings[option] = server_config.getboolean("DEFAULT",
2824
3037
if server_settings["port"]:
2997
3210
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2998
3211
service = AvahiServiceToSyslog(
2999
name = server_settings["servicename"],
3000
servicetype = "_mandos._tcp",
3001
protocol = protocol,
3212
name=server_settings["servicename"],
3213
servicetype="_mandos._tcp",
3003
3216
if server_settings["interface"]:
3004
3217
service.interface = if_nametoindex(
3005
3218
server_settings["interface"].encode("utf-8"))
3007
3220
global multiprocessing_manager
3008
3221
multiprocessing_manager = multiprocessing.Manager()
3010
3223
client_class = Client
3012
client_class = functools.partial(ClientDBus, bus = bus)
3225
client_class = functools.partial(ClientDBus, bus=bus)
3014
3227
client_settings = Client.config_parser(client_config)
3015
3228
old_client_settings = {}
3016
3229
clients_data = {}
3018
3231
# This is used to redirect stdout and stderr for checker processes
3020
wnull = open(os.devnull, "w") # A writable /dev/null
3233
wnull = open(os.devnull, "w") # A writable /dev/null
3021
3234
# Only used if server is running in foreground but not in debug
3023
3236
if debug or not foreground:
3026
3239
# Get client data and settings from last running state.
3027
3240
if server_settings["restore"]:
3029
3242
with open(stored_state_path, "rb") as stored_state:
3030
clients_data, old_client_settings = pickle.load(
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]
3032
3293
os.remove(stored_state_path)
3033
3294
except IOError as e:
3034
3295
if e.errno == errno.ENOENT:
3134
3395
pidfilename, pid)
3136
3397
del pidfilename
3138
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
3139
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3399
for termsig in (signal.SIGHUP, signal.SIGTERM):
3400
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3401
lambda: main_loop.quit() and False)
3143
3405
@alternate_dbus_interfaces(
3144
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
3406
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3145
3407
class MandosDBusService(DBusObjectWithObjectManager):
3146
3408
"""A D-Bus proxy object"""
3148
3410
def __init__(self):
3149
3411
dbus.service.Object.__init__(self, bus, "/")
3151
3413
_interface = "se.recompile.Mandos"
3153
3415
@dbus.service.signal(_interface, signature="o")
3154
3416
def ClientAdded(self, objpath):
3158
3420
@dbus.service.signal(_interface, signature="ss")
3159
def ClientNotFound(self, fingerprint, address):
3421
def ClientNotFound(self, key_id, address):
3163
3425
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3165
3427
@dbus.service.signal(_interface, signature="os")
3166
3428
def ClientRemoved(self, objpath, name):
3170
3432
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3172
3434
@dbus.service.method(_interface, out_signature="ao")
3173
3435
def GetAllClients(self):
3175
3437
return dbus.Array(c.dbus_object_path for c in
3176
tcp_server.clients.itervalues())
3438
tcp_server.clients.values())
3178
3440
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3180
3442
@dbus.service.method(_interface,