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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 © 2008-2020 Teddy Hogeborn
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# Copyright © 2008-2020 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 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,
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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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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)]
668
openpgp_crt_init.restype = _error_code
670
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,
678
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
762
_need_version = b"3.3.0"
763
if check_version(_need_version) is None:
764
raise self.Error("Needs GnuTLS {} or later"
765
.format(_need_version))
767
_tls_rawpk_version = b"3.6.6"
768
has_rawpk = bool(check_version(_tls_rawpk_version))
772
class pubkey_st(ctypes.Structure):
774
pubkey_t = ctypes.POINTER(pubkey_st)
776
x509_crt_fmt_t = ctypes.c_int
778
# All the function declarations below are from
780
pubkey_init = _library.gnutls_pubkey_init
781
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
782
pubkey_init.restype = _error_code
784
pubkey_import = _library.gnutls_pubkey_import
785
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
787
pubkey_import.restype = _error_code
789
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
790
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
791
ctypes.POINTER(ctypes.c_ubyte),
792
ctypes.POINTER(ctypes.c_size_t)]
793
pubkey_get_key_id.restype = _error_code
795
pubkey_deinit = _library.gnutls_pubkey_deinit
796
pubkey_deinit.argtypes = [pubkey_t]
797
pubkey_deinit.restype = None
799
# All the function declarations below are from
802
openpgp_crt_init = _library.gnutls_openpgp_crt_init
803
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
804
openpgp_crt_init.restype = _error_code
806
openpgp_crt_import = _library.gnutls_openpgp_crt_import
807
openpgp_crt_import.argtypes = [openpgp_crt_t,
808
ctypes.POINTER(datum_t),
810
openpgp_crt_import.restype = _error_code
812
openpgp_crt_verify_self = \
813
_library.gnutls_openpgp_crt_verify_self
814
openpgp_crt_verify_self.argtypes = [
817
ctypes.POINTER(ctypes.c_uint),
819
openpgp_crt_verify_self.restype = _error_code
821
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
822
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
823
openpgp_crt_deinit.restype = None
825
openpgp_crt_get_fingerprint = (
826
_library.gnutls_openpgp_crt_get_fingerprint)
827
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
831
openpgp_crt_get_fingerprint.restype = _error_code
833
if check_version(b"3.6.4"):
834
certificate_type_get2 = _library.gnutls_certificate_type_get2
835
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
836
certificate_type_get2.restype = _error_code
693
838
# Remove non-public functions
694
839
del _error_code, _retry_on_error
695
# Create the global "gnutls" object, simulating a module
698
842
def call_pipe(connection, # : multiprocessing.Connection
699
843
func, *args, **kwargs):
700
844
"""This function is meant to be called by multiprocessing.Process
702
846
This function runs func(*args, **kwargs), and writes the resulting
703
847
return value on the provided multiprocessing.Connection.
705
849
connection.send(func(*args, **kwargs))
706
850
connection.close()
708
class Client(object):
709
854
"""A representation of a client host served by this server.
712
857
approved: bool(); 'None' if not yet approved/disapproved
713
858
approval_delay: datetime.timedelta(); Time to wait for approval
714
859
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
860
checker: multiprocessing.Process(); a running checker process used
861
to see if the client lives. 'None' if no process is
863
checker_callback_tag: a GLib event source tag, or None
719
864
checker_command: string; External command which is run to check
720
865
if client lives. %() expansions are done at
721
866
runtime with vars(self) as dict, so that for
722
867
instance %(name)s can be used in the command.
723
checker_initiator_tag: a gobject event source tag, or None
868
checker_initiator_tag: a GLib event source tag, or None
724
869
created: datetime.datetime(); (UTC) object creation
725
870
client_structure: Object describing what attributes a client has
726
871
and is used for storing the client at exit
727
872
current_checker_command: string; current running checker_command
728
disable_initiator_tag: a gobject event source tag, or None
873
disable_initiator_tag: a GLib event source tag, or None
730
875
fingerprint: string (40 or 32 hexadecimal digits); used to
731
uniquely identify the client
876
uniquely identify an OpenPGP client
877
key_id: string (64 hexadecimal digits); used to uniquely identify
878
a client using raw public keys
732
879
host: string; available for use by the checker command
733
880
interval: datetime.timedelta(); How often to start a new checker
734
881
last_approval_request: datetime.datetime(); (UTC) or None
886
1038
logger.info("Disabling client %s", self.name)
887
1039
if getattr(self, "disable_initiator_tag", None) is not None:
888
gobject.source_remove(self.disable_initiator_tag)
1040
GLib.source_remove(self.disable_initiator_tag)
889
1041
self.disable_initiator_tag = None
890
1042
self.expires = None
891
1043
if getattr(self, "checker_initiator_tag", None) is not None:
892
gobject.source_remove(self.checker_initiator_tag)
1044
GLib.source_remove(self.checker_initiator_tag)
893
1045
self.checker_initiator_tag = None
894
1046
self.stop_checker()
895
1047
self.enabled = False
897
1049
self.send_changedstate()
898
# Do not run this again if called by a gobject.timeout_add
1050
# Do not run this again if called by a GLib.timeout_add
901
1053
def __del__(self):
904
1056
def init_checker(self):
905
1057
# Schedule a new checker to be started an 'interval' from now,
906
1058
# and every interval from then on.
907
1059
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),
1060
GLib.source_remove(self.checker_initiator_tag)
1061
self.checker_initiator_tag = GLib.timeout_add(
1062
random.randrange(int(self.interval.total_seconds() * 1000
911
1064
self.start_checker)
912
1065
# Schedule a disable() when 'timeout' has passed
913
1066
if self.disable_initiator_tag is not None:
914
gobject.source_remove(self.disable_initiator_tag)
915
self.disable_initiator_tag = gobject.timeout_add(
1067
GLib.source_remove(self.disable_initiator_tag)
1068
self.disable_initiator_tag = GLib.timeout_add(
916
1069
int(self.timeout.total_seconds() * 1000), self.disable)
917
1070
# Also start a new checker *right now*.
918
1071
self.start_checker()
920
1073
def checker_callback(self, source, condition, connection,
922
1075
"""The checker has completed, so take appropriate actions."""
923
self.checker_callback_tag = None
925
1076
# Read return code from connection (see call_pipe)
926
1077
returncode = connection.recv()
927
1078
connection.close()
1079
if self.checker is not None:
1081
self.checker_callback_tag = None
929
1084
if returncode >= 0:
930
1085
self.last_checker_status = returncode
931
1086
self.last_checker_signal = None
1387
1542
exc_info=error)
1388
1543
return xmlstring
1391
1547
dbus.OBJECT_MANAGER_IFACE
1392
1548
except AttributeError:
1393
1549
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1395
1552
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1396
1553
"""A D-Bus object with an ObjectManager.
1398
1555
Classes inheriting from this exposes the standard
1399
1556
GetManagedObjects call and the InterfacesAdded and
1400
1557
InterfacesRemoved signals on the standard
1401
1558
"org.freedesktop.DBus.ObjectManager" interface.
1403
1560
Note: No signals are sent automatically; they must be sent
1406
1563
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1407
out_signature = "a{oa{sa{sv}}}")
1564
out_signature="a{oa{sa{sv}}}")
1408
1565
def GetManagedObjects(self):
1409
1566
"""This function must be overridden"""
1410
1567
raise NotImplementedError()
1412
1569
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1413
signature = "oa{sa{sv}}")
1570
signature="oa{sa{sv}}")
1414
1571
def InterfacesAdded(self, object_path, interfaces_and_properties):
1417
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1574
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1418
1575
def InterfacesRemoved(self, object_path, interfaces):
1421
1578
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1422
out_signature = "s",
1423
path_keyword = 'object_path',
1424
connection_keyword = 'connection')
1580
path_keyword='object_path',
1581
connection_keyword='connection')
1425
1582
def Introspect(self, object_path, connection):
1426
1583
"""Overloading of standard D-Bus method.
1428
1585
Override return argument name of GetManagedObjects to be
1429
1586
"objpath_interfaces_and_properties"
2323
class MultiprocessingMixIn(object):
2530
class MultiprocessingMixIn:
2324
2531
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2326
2533
def sub_process_main(self, request, address):
2328
2535
self.finish_request(request, address)
2329
2536
except Exception:
2330
2537
self.handle_error(request, address)
2331
2538
self.close_request(request)
2333
2540
def process_request(self, request, address):
2334
2541
"""Start a new process to process the request."""
2335
proc = multiprocessing.Process(target = self.sub_process_main,
2336
args = (request, address))
2542
proc = multiprocessing.Process(target=self.sub_process_main,
2543
args=(request, address))
2341
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2548
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
2342
2549
""" adds a pipe to the MixIn """
2344
2551
def process_request(self, request, client_address):
2345
2552
"""Overrides and wraps the original process_request().
2347
2554
This function creates a new pipe in self.pipe
2349
2556
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2351
2558
proc = MultiprocessingMixIn.process_request(self, request,
2352
2559
client_address)
2353
2560
self.child_pipe.close()
2354
2561
self.add_pipe(parent_pipe, proc)
2356
2563
def add_pipe(self, parent_pipe, proc):
2357
2564
"""Dummy function; override as necessary"""
2358
2565
raise NotImplementedError()
2361
2568
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2362
socketserver.TCPServer, object):
2569
socketserver.TCPServer):
2363
2570
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2366
2573
enabled: Boolean; whether this server is activated yet
2367
2574
interface: None or a network interface name (string)
2368
2575
use_ipv6: Boolean; to use IPv6 or not
2371
2578
def __init__(self, server_address, RequestHandlerClass,
2372
2579
interface=None,
2406
2614
# socket_wrapper(), if socketfd was set.
2407
2615
socketserver.TCPServer.__init__(self, server_address,
2408
2616
RequestHandlerClass)
2410
2618
def server_bind(self):
2411
2619
"""This overrides the normal server_bind() function
2412
2620
to bind to an interface if one was specified, and also NOT to
2413
2621
bind to an address or port if they were not specified."""
2622
global SO_BINDTODEVICE
2414
2623
if self.interface is not None:
2415
2624
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)
2625
# Fall back to a hard-coded value which seems to be
2627
logger.warning("SO_BINDTODEVICE not found, trying 25")
2628
SO_BINDTODEVICE = 25
2630
self.socket.setsockopt(
2631
socket.SOL_SOCKET, SO_BINDTODEVICE,
2632
(self.interface + "\0").encode("utf-8"))
2633
except socket.error as error:
2634
if error.errno == errno.EPERM:
2635
logger.error("No permission to bind to"
2636
" interface %s", self.interface)
2637
elif error.errno == errno.ENOPROTOOPT:
2638
logger.error("SO_BINDTODEVICE not available;"
2639
" cannot bind to interface %s",
2641
elif error.errno == errno.ENODEV:
2642
logger.error("Interface %s does not exist,"
2643
" cannot bind", self.interface)
2437
2646
# Only bind(2) the socket if we really need to.
2438
2647
if self.server_address[0] or self.server_address[1]:
2648
if self.server_address[1]:
2649
self.allow_reuse_address = True
2439
2650
if not self.server_address[0]:
2440
2651
if self.address_family == socket.AF_INET6:
2441
any_address = "::" # in6addr_any
2652
any_address = "::" # in6addr_any
2443
any_address = "0.0.0.0" # INADDR_ANY
2654
any_address = "0.0.0.0" # INADDR_ANY
2444
2655
self.server_address = (any_address,
2445
2656
self.server_address[1])
2446
2657
elif not self.server_address[1]:
2480
2691
self.gnutls_priority = gnutls_priority
2481
2692
IPv6_TCPServer.__init__(self, server_address,
2482
2693
RequestHandlerClass,
2483
interface = interface,
2484
use_ipv6 = use_ipv6,
2485
socketfd = socketfd)
2694
interface=interface,
2487
2698
def server_activate(self):
2488
2699
if self.enabled:
2489
2700
return socketserver.TCPServer.server_activate(self)
2491
2702
def enable(self):
2492
2703
self.enabled = True
2494
2705
def add_pipe(self, parent_pipe, proc):
2495
2706
# 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,
2708
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2709
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2499
2710
functools.partial(self.handle_ipc,
2500
parent_pipe = parent_pipe,
2711
parent_pipe=parent_pipe,
2503
2714
def handle_ipc(self, source, condition,
2504
2715
parent_pipe=None,
2506
2717
client_object=None):
2507
2718
# error, or the other end of multiprocessing.Pipe has closed
2508
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2719
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2509
2720
# Wait for other process to exit
2513
2724
# Read a request from the child
2514
2725
request = parent_pipe.recv()
2515
2726
command = request[0]
2517
2728
if command == 'init':
2519
address = request[2]
2521
for c in self.clients.itervalues():
2522
if c.fingerprint == fpr:
2729
key_id = request[1].decode("ascii")
2730
fpr = request[2].decode("ascii")
2731
address = request[3]
2733
for c in self.clients.values():
2734
if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"
2735
"27AE41E4649B934CA495991B7852B855"):
2737
if key_id and c.key_id == key_id:
2740
if fpr and c.fingerprint == fpr:
2526
logger.info("Client not found for fingerprint: %s, ad"
2527
"dress: %s", fpr, address)
2744
logger.info("Client not found for key ID: %s, address"
2745
": %s", key_id or fpr, address)
2528
2746
if self.use_dbus:
2529
2747
# Emit D-Bus signal
2530
mandos_dbus_service.ClientNotFound(fpr,
2748
mandos_dbus_service.ClientNotFound(key_id or fpr,
2532
2750
parent_pipe.send(False)
2535
gobject.io_add_watch(
2536
parent_pipe.fileno(),
2537
gobject.IO_IN | gobject.IO_HUP,
2754
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2755
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2538
2756
functools.partial(self.handle_ipc,
2539
parent_pipe = parent_pipe,
2541
client_object = client))
2757
parent_pipe=parent_pipe,
2759
client_object=client))
2542
2760
parent_pipe.send(True)
2543
2761
# remove the old hook in favor of the new above hook on
2547
2765
funcname = request[1]
2548
2766
args = request[2]
2549
2767
kwargs = request[3]
2551
2769
parent_pipe.send(('data', getattr(client_object,
2552
2770
funcname)(*args,
2555
2773
if command == 'getattr':
2556
2774
attrname = request[1]
2557
2775
if isinstance(client_object.__getattribute__(attrname),
2558
collections.Callable):
2776
collections.abc.Callable):
2559
2777
parent_pipe.send(('function', ))
2561
2779
parent_pipe.send((
2562
2780
'data', client_object.__getattribute__(attrname)))
2564
2782
if command == 'setattr':
2565
2783
attrname = request[1]
2566
2784
value = request[2]
2567
2785
setattr(client_object, attrname, value)
2572
2790
def rfc3339_duration_to_delta(duration):
2573
2791
"""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)
2793
>>> timedelta = datetime.timedelta
2794
>>> rfc3339_duration_to_delta("P7D") == timedelta(7)
2796
>>> rfc3339_duration_to_delta("PT60S") == timedelta(0, 60)
2798
>>> rfc3339_duration_to_delta("PT60M") == timedelta(0, 3600)
2800
>>> rfc3339_duration_to_delta("PT24H") == timedelta(1)
2802
>>> rfc3339_duration_to_delta("P1W") == timedelta(7)
2804
>>> rfc3339_duration_to_delta("PT5M30S") == timedelta(0, 330)
2806
>>> rfc3339_duration_to_delta("P1DT3M20S") == timedelta(1, 200)
2591
2811
# Parsing an RFC 3339 duration with regular expressions is not
2592
2812
# possible - there would have to be multiple places for the same
2593
2813
# values, like seconds. The current code, while more esoteric, is
2594
2814
# cleaner without depending on a parsing library. If Python had a
2595
2815
# built-in library for parsing we would use it, but we'd like to
2596
2816
# avoid excessive use of external libraries.
2598
2818
# New type for defining tokens, syntax, and semantics all-in-one
2599
2819
Token = collections.namedtuple("Token", (
2600
2820
"regexp", # To match token; if "value" is not None, must have
2784
3007
parser.add_argument("--no-zeroconf", action="store_false",
2785
3008
dest="zeroconf", help="Do not use Zeroconf",
2788
3011
options = parser.parse_args()
2792
fail_count, test_count = doctest.testmod()
2793
sys.exit(os.EX_OK if fail_count == 0 else 1)
2795
3013
# 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",
3014
if gnutls.has_rawpk:
3015
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
3016
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
3018
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
3019
":+SIGN-DSA-SHA256")
3020
server_defaults = {"interface": "",
3024
"priority": priority,
3025
"servicename": "Mandos",
3031
"statedir": "/var/lib/mandos",
3032
"foreground": "False",
2814
3037
# Parse config file for server-global settings
2815
server_config = configparser.SafeConfigParser(server_defaults)
3038
server_config = configparser.ConfigParser(server_defaults)
2816
3039
del server_defaults
2817
3040
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2818
# Convert the SafeConfigParser object to a dict
3041
# Convert the ConfigParser object to a dict
2819
3042
server_settings = server_config.defaults()
2820
3043
# Use the appropriate methods on the non-string config options
2821
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
3044
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3045
"foreground", "zeroconf"):
2822
3046
server_settings[option] = server_config.getboolean("DEFAULT",
2824
3048
if server_settings["port"]:
2990
3221
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2991
3222
service = AvahiServiceToSyslog(
2992
name = server_settings["servicename"],
2993
servicetype = "_mandos._tcp",
2994
protocol = protocol,
3223
name=server_settings["servicename"],
3224
servicetype="_mandos._tcp",
2996
3227
if server_settings["interface"]:
2997
3228
service.interface = if_nametoindex(
2998
3229
server_settings["interface"].encode("utf-8"))
3000
3231
global multiprocessing_manager
3001
3232
multiprocessing_manager = multiprocessing.Manager()
3003
3234
client_class = Client
3005
client_class = functools.partial(ClientDBus, bus = bus)
3236
client_class = functools.partial(ClientDBus, bus=bus)
3007
3238
client_settings = Client.config_parser(client_config)
3008
3239
old_client_settings = {}
3009
3240
clients_data = {}
3011
3242
# This is used to redirect stdout and stderr for checker processes
3013
wnull = open(os.devnull, "w") # A writable /dev/null
3244
wnull = open(os.devnull, "w") # A writable /dev/null
3014
3245
# Only used if server is running in foreground but not in debug
3016
3247
if debug or not foreground:
3019
3250
# Get client data and settings from last running state.
3020
3251
if server_settings["restore"]:
3022
3253
with open(stored_state_path, "rb") as stored_state:
3023
clients_data, old_client_settings = pickle.load(
3254
if sys.version_info.major == 2:
3255
clients_data, old_client_settings = pickle.load(
3258
bytes_clients_data, bytes_old_client_settings = (
3259
pickle.load(stored_state, encoding="bytes"))
3260
# Fix bytes to strings
3263
clients_data = {(key.decode("utf-8")
3264
if isinstance(key, bytes)
3267
bytes_clients_data.items()}
3268
del bytes_clients_data
3269
for key in clients_data:
3270
value = {(k.decode("utf-8")
3271
if isinstance(k, bytes) else k): v
3273
clients_data[key].items()}
3274
clients_data[key] = value
3276
value["client_structure"] = [
3278
if isinstance(s, bytes)
3280
value["client_structure"]]
3281
# .name, .host, and .checker_command
3282
for k in ("name", "host", "checker_command"):
3283
if isinstance(value[k], bytes):
3284
value[k] = value[k].decode("utf-8")
3285
if "key_id" not in value:
3286
value["key_id"] = ""
3287
elif "fingerprint" not in value:
3288
value["fingerprint"] = ""
3289
# old_client_settings
3291
old_client_settings = {
3292
(key.decode("utf-8")
3293
if isinstance(key, bytes)
3296
bytes_old_client_settings.items()}
3297
del bytes_old_client_settings
3298
# .host and .checker_command
3299
for value in old_client_settings.values():
3300
for attribute in ("host", "checker_command"):
3301
if isinstance(value[attribute], bytes):
3302
value[attribute] = (value[attribute]
3025
3304
os.remove(stored_state_path)
3026
3305
except IOError as e:
3027
3306
if e.errno == errno.ENOENT:
3127
3406
pidfilename, pid)
3129
3408
del pidfilename
3131
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
3132
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3410
for termsig in (signal.SIGHUP, signal.SIGTERM):
3411
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3412
lambda: main_loop.quit() and False)
3136
3416
@alternate_dbus_interfaces(
3137
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
3417
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3138
3418
class MandosDBusService(DBusObjectWithObjectManager):
3139
3419
"""A D-Bus proxy object"""
3141
3421
def __init__(self):
3142
3422
dbus.service.Object.__init__(self, bus, "/")
3144
3424
_interface = "se.recompile.Mandos"
3146
3426
@dbus.service.signal(_interface, signature="o")
3147
3427
def ClientAdded(self, objpath):
3151
3431
@dbus.service.signal(_interface, signature="ss")
3152
def ClientNotFound(self, fingerprint, address):
3432
def ClientNotFound(self, key_id, address):
3156
3436
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3158
3438
@dbus.service.signal(_interface, signature="os")
3159
3439
def ClientRemoved(self, objpath, name):
3163
3443
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3165
3445
@dbus.service.method(_interface, out_signature="ao")
3166
3446
def GetAllClients(self):
3168
3448
return dbus.Array(c.dbus_object_path for c in
3169
tcp_server.clients.itervalues())
3449
tcp_server.clients.values())
3171
3451
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3173
3453
@dbus.service.method(_interface,