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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 © 2008-2012 Teddy Hogeborn
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# Copyright © 2008-2012 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 SocketServer as socketserver
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import gnutls.connection
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import gnutls.library.functions
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import gnutls.library.constants
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import gnutls.library.types
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import ConfigParser as configparser
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import ConfigParser as configparser
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import cPickle as pickle
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import cPickle as pickle
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import multiprocessing
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import dbus.service
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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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# 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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# 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.major == 2:
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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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syslogger = (logging.handlers.SysLogHandler
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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = str("/dev/log")))
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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"))
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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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with contextlib.closing(socket.socket()) as s:
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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
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struct.pack(str("16s16x"),
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interface_index = struct.unpack(str("I"),
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struct.pack(b"16s16x", interface))
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interface_index = struct.unpack("I", ifreq[16:20])[0]
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return interface_index
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def copy_function(func):
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"""Make a copy of a function"""
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if sys.version_info.major == 2:
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return types.FunctionType(func.func_code,
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return types.FunctionType(func.__code__,
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def initlogger(debug, level=logging.WARNING):
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"""init logger and add loglevel"""
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syslogger = (logging.handlers.SysLogHandler(
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facility=logging.handlers.SysLogHandler.LOG_DAEMON,
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syslogger.setFormatter(logging.Formatter
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('Mandos [%(process)d]: %(levelname)s:'
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logger.addHandler(syslogger)
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console = logging.StreamHandler()
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console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
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os.rmdir(self.tempdir)
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self.tempdir = None
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def password_encode(self, password):
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# Passphrase can not be empty and can not contain newlines or
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# NUL bytes. So we prefix it and hex encode it.
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return b"mandos" + binascii.hexlify(password)
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encoded = b"mandos" + binascii.hexlify(password)
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if len(encoded) > 2048:
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# GnuPG can't handle long passwords, so encode differently
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encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
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.replace(b"\n", b"\\n")
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.replace(b"\0", b"\\x00"))
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def encrypt(self, data, password):
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self.gnupg.passphrase = self.password_encode(password)
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with open(os.devnull, "w") as devnull:
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proc = self.gnupg.run(['--symmetric'],
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create_fhs=['stdin', 'stdout'],
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attach_fhs={'stderr': devnull})
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with contextlib.closing(proc.handles['stdin']) as f:
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with contextlib.closing(proc.handles['stdout']) as f:
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ciphertext = f.read()
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self.gnupg.passphrase = None
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passphrase = self.password_encode(password)
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with tempfile.NamedTemporaryFile(
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dir=self.tempdir) as passfile:
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passfile.write(passphrase)
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proc = subprocess.Popen([self.gpg, '--symmetric',
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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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return ciphertext
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def decrypt(self, data, password):
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self.gnupg.passphrase = self.password_encode(password)
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with open(os.devnull, "w") as devnull:
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proc = self.gnupg.run(['--decrypt'],
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create_fhs=['stdin', 'stdout'],
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attach_fhs={'stderr': devnull})
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with contextlib.closing(proc.handles['stdin']) as f:
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with contextlib.closing(proc.handles['stdout']) as f:
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decrypted_plaintext = f.read()
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self.gnupg.passphrase = None
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passphrase = self.password_encode(password)
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with tempfile.NamedTemporaryFile(
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dir=self.tempdir) as passfile:
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passfile.write(passphrase)
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proc = subprocess.Popen([self.gpg, '--decrypt',
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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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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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super(AvahiError, self).__init__(value, *args, **kwargs)
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def __unicode__(self):
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return unicode(repr(self.value))
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return super(AvahiError, self).__init__(value, *args,
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class AvahiServiceError(AvahiError):
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class AvahiGroupError(AvahiError):
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class AvahiService(object):
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"""An Avahi (Zeroconf) service.
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interface: integer; avahi.IF_UNSPEC or an interface index.
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Used to optionally bind to the specified interface.
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name: string; Example: 'Mandos'
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type: string; Example: '_mandos._tcp'.
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See <http://www.dns-sd.org/ServiceTypes.html>
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See <https://www.iana.org/assignments/service-names-port-numbers>
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port: integer; what port to announce
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TXT: list of strings; TXT record for the service
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domain: string; Domain to publish on, default to .local if empty.
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follow_name_owner_changes=True),
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avahi.DBUS_INTERFACE_SERVER)
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self.server.connect_to_signal("StateChanged",
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self.server_state_changed)
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self.server_state_changed)
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self.server_state_changed(self.server.GetState())
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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)
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syslogger.setFormatter(logging.Formatter
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('Mandos ({0}) [%(process)d]:'
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' %(levelname)s: %(message)s'
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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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def timedelta_to_milliseconds(td):
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"Convert a datetime.timedelta() to milliseconds"
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return ((td.days * 24 * 60 * 60 * 1000)
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+ (td.seconds * 1000)
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+ (td.microseconds // 1000))
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class Client(object):
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# Pretend that we have a GnuTLS module
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"""This isn't so much a class as it is a module-like namespace."""
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library = ctypes.util.find_library("gnutls")
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library = ctypes.util.find_library("gnutls-deb0")
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_library = ctypes.cdll.LoadLibrary(library)
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# 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_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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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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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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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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class CertificateSecurityError(Error):
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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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gnutls.certificate_free_credentials(self._c_object)
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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_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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if credentials is None:
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credentials = gnutls.Credentials()
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gnutls.credentials_set(self._c_object, credentials.type,
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ctypes.cast(credentials._c_object,
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self.credentials = credentials
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gnutls.deinit(self._c_object)
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return gnutls.handshake(self._c_object)
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def send(self, data):
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data_len -= gnutls.record_send(self._c_object,
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return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
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# Error handling functions
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def _error_code(result):
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"""A function to raise exceptions on errors, suitable
641
for the 'restype' attribute on ctypes functions"""
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if result == gnutls.E_NO_CERTIFICATE_FOUND:
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raise gnutls.CertificateSecurityError(code=result)
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raise gnutls.Error(code=result)
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def _retry_on_error(result, func, arguments):
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"""A function to retry on some errors, suitable
650
for the 'errcheck' attribute on ctypes functions"""
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if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
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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.
661
priority_set_direct = _library.gnutls_priority_set_direct
662
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
671
set_default_priority.argtypes = [session_t]
672
set_default_priority.restype = _error_code
674
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
678
record_send.errcheck = _retry_on_error
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certificate_allocate_credentials = (
681
_library.gnutls_certificate_allocate_credentials)
682
certificate_allocate_credentials.argtypes = [
683
ctypes.POINTER(certificate_credentials_t)]
684
certificate_allocate_credentials.restype = _error_code
686
certificate_free_credentials = (
687
_library.gnutls_certificate_free_credentials)
688
certificate_free_credentials.argtypes = [
689
certificate_credentials_t]
690
certificate_free_credentials.restype = None
692
handshake_set_private_extensions = (
693
_library.gnutls_handshake_set_private_extensions)
694
handshake_set_private_extensions.argtypes = [session_t,
696
handshake_set_private_extensions.restype = None
698
credentials_set = _library.gnutls_credentials_set
699
credentials_set.argtypes = [session_t, credentials_type_t,
701
credentials_set.restype = _error_code
703
strerror = _library.gnutls_strerror
704
strerror.argtypes = [ctypes.c_int]
705
strerror.restype = ctypes.c_char_p
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certificate_type_get = _library.gnutls_certificate_type_get
708
certificate_type_get.argtypes = [session_t]
709
certificate_type_get.restype = _error_code
711
certificate_get_peers = _library.gnutls_certificate_get_peers
712
certificate_get_peers.argtypes = [session_t,
713
ctypes.POINTER(ctypes.c_uint)]
714
certificate_get_peers.restype = ctypes.POINTER(datum_t)
716
global_set_log_level = _library.gnutls_global_set_log_level
717
global_set_log_level.argtypes = [ctypes.c_int]
718
global_set_log_level.restype = None
720
global_set_log_function = _library.gnutls_global_set_log_function
721
global_set_log_function.argtypes = [log_func]
722
global_set_log_function.restype = None
724
deinit = _library.gnutls_deinit
725
deinit.argtypes = [session_t]
726
deinit.restype = None
728
handshake = _library.gnutls_handshake
729
handshake.argtypes = [session_t]
730
handshake.restype = _error_code
731
handshake.errcheck = _retry_on_error
733
transport_set_ptr = _library.gnutls_transport_set_ptr
734
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
735
transport_set_ptr.restype = None
737
bye = _library.gnutls_bye
738
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
743
check_version.argtypes = [ctypes.c_char_p]
744
check_version.restype = ctypes.c_char_p
746
_need_version = b"3.3.0"
747
if check_version(_need_version) is None:
748
raise self.Error("Needs GnuTLS {} or later"
749
.format(_need_version))
751
_tls_rawpk_version = b"3.6.6"
752
has_rawpk = bool(check_version(_tls_rawpk_version))
756
class pubkey_st(ctypes.Structure):
758
pubkey_t = ctypes.POINTER(pubkey_st)
760
x509_crt_fmt_t = ctypes.c_int
762
# All the function declarations below are from gnutls/abstract.h
763
pubkey_init = _library.gnutls_pubkey_init
764
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
765
pubkey_init.restype = _error_code
767
pubkey_import = _library.gnutls_pubkey_import
768
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
770
pubkey_import.restype = _error_code
772
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
773
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
774
ctypes.POINTER(ctypes.c_ubyte),
775
ctypes.POINTER(ctypes.c_size_t)]
776
pubkey_get_key_id.restype = _error_code
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pubkey_deinit = _library.gnutls_pubkey_deinit
779
pubkey_deinit.argtypes = [pubkey_t]
780
pubkey_deinit.restype = None
782
# All the function declarations below are from gnutls/openpgp.h
784
openpgp_crt_init = _library.gnutls_openpgp_crt_init
785
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
786
openpgp_crt_init.restype = _error_code
788
openpgp_crt_import = _library.gnutls_openpgp_crt_import
789
openpgp_crt_import.argtypes = [openpgp_crt_t,
790
ctypes.POINTER(datum_t),
792
openpgp_crt_import.restype = _error_code
794
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
795
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
796
ctypes.POINTER(ctypes.c_uint)]
797
openpgp_crt_verify_self.restype = _error_code
799
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
800
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
801
openpgp_crt_deinit.restype = None
803
openpgp_crt_get_fingerprint = (
804
_library.gnutls_openpgp_crt_get_fingerprint)
805
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
809
openpgp_crt_get_fingerprint.restype = _error_code
811
if check_version(b"3.6.4"):
812
certificate_type_get2 = _library.gnutls_certificate_type_get2
813
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
814
certificate_type_get2.restype = _error_code
816
# Remove non-public functions
817
del _error_code, _retry_on_error
820
def call_pipe(connection, # : multiprocessing.Connection
821
func, *args, **kwargs):
822
"""This function is meant to be called by multiprocessing.Process
824
This function runs func(*args, **kwargs), and writes the resulting
825
return value on the provided multiprocessing.Connection.
827
connection.send(func(*args, **kwargs))
403
832
"""A representation of a client host served by this server.
406
835
approved: bool(); 'None' if not yet approved/disapproved
407
836
approval_delay: datetime.timedelta(); Time to wait for approval
408
837
approval_duration: datetime.timedelta(); Duration of one approval
409
checker: subprocess.Popen(); a running checker process used
410
to see if the client lives.
411
'None' if no process is running.
412
checker_callback_tag: a gobject event source tag, or None
838
checker: multiprocessing.Process(); a running checker process used
839
to see if the client lives. 'None' if no process is
841
checker_callback_tag: a GLib event source tag, or None
413
842
checker_command: string; External command which is run to check
414
843
if client lives. %() expansions are done at
415
844
runtime with vars(self) as dict, so that for
416
845
instance %(name)s can be used in the command.
417
checker_initiator_tag: a gobject event source tag, or None
846
checker_initiator_tag: a GLib event source tag, or None
418
847
created: datetime.datetime(); (UTC) object creation
419
848
client_structure: Object describing what attributes a client has
420
849
and is used for storing the client at exit
421
850
current_checker_command: string; current running checker_command
422
disable_initiator_tag: a gobject event source tag, or None
851
disable_initiator_tag: a GLib event source tag, or None
424
853
fingerprint: string (40 or 32 hexadecimal digits); used to
425
uniquely identify the client
854
uniquely identify an OpenPGP client
855
key_id: string (64 hexadecimal digits); used to uniquely identify
856
a client using raw public keys
426
857
host: string; available for use by the checker command
427
858
interval: datetime.timedelta(); How often to start a new checker
428
859
last_approval_request: datetime.datetime(); (UTC) or None
591
1016
logger.info("Disabling client %s", self.name)
592
1017
if getattr(self, "disable_initiator_tag", None) is not None:
593
gobject.source_remove(self.disable_initiator_tag)
1018
GLib.source_remove(self.disable_initiator_tag)
594
1019
self.disable_initiator_tag = None
595
1020
self.expires = None
596
1021
if getattr(self, "checker_initiator_tag", None) is not None:
597
gobject.source_remove(self.checker_initiator_tag)
1022
GLib.source_remove(self.checker_initiator_tag)
598
1023
self.checker_initiator_tag = None
599
1024
self.stop_checker()
600
1025
self.enabled = False
602
1027
self.send_changedstate()
603
# Do not run this again if called by a gobject.timeout_add
1028
# Do not run this again if called by a GLib.timeout_add
606
1031
def __del__(self):
609
1034
def init_checker(self):
610
1035
# Schedule a new checker to be started an 'interval' from now,
611
1036
# and every interval from then on.
612
1037
if self.checker_initiator_tag is not None:
613
gobject.source_remove(self.checker_initiator_tag)
614
self.checker_initiator_tag = (gobject.timeout_add
615
(self.interval_milliseconds(),
1038
GLib.source_remove(self.checker_initiator_tag)
1039
self.checker_initiator_tag = GLib.timeout_add(
1040
int(self.interval.total_seconds() * 1000),
617
1042
# Schedule a disable() when 'timeout' has passed
618
1043
if self.disable_initiator_tag is not None:
619
gobject.source_remove(self.disable_initiator_tag)
620
self.disable_initiator_tag = (gobject.timeout_add
621
(self.timeout_milliseconds(),
1044
GLib.source_remove(self.disable_initiator_tag)
1045
self.disable_initiator_tag = GLib.timeout_add(
1046
int(self.timeout.total_seconds() * 1000), self.disable)
623
1047
# Also start a new checker *right now*.
624
1048
self.start_checker()
626
def checker_callback(self, pid, condition, command):
1050
def checker_callback(self, source, condition, connection,
627
1052
"""The checker has completed, so take appropriate actions."""
1053
# Read return code from connection (see call_pipe)
1054
returncode = connection.recv()
1056
if self.checker is not None:
628
1058
self.checker_callback_tag = None
629
1059
self.checker = None
630
if os.WIFEXITED(condition):
631
self.last_checker_status = os.WEXITSTATUS(condition)
1062
self.last_checker_status = returncode
1063
self.last_checker_signal = None
632
1064
if self.last_checker_status == 0:
633
1065
logger.info("Checker for %(name)s succeeded",
635
1067
self.checked_ok()
637
logger.info("Checker for %(name)s failed",
1069
logger.info("Checker for %(name)s failed", vars(self))
640
1071
self.last_checker_status = -1
1072
self.last_checker_signal = -returncode
641
1073
logger.warning("Checker for %(name)s crashed?",
644
1077
def checked_ok(self):
645
1078
"""Assert that the client has been seen, alive and well."""
646
1079
self.last_checked_ok = datetime.datetime.utcnow()
647
1080
self.last_checker_status = 0
1081
self.last_checker_signal = None
648
1082
self.bump_timeout()
650
1084
def bump_timeout(self, timeout=None):
651
1085
"""Bump up the timeout for this client."""
652
1086
if timeout is None:
653
1087
timeout = self.timeout
654
1088
if self.disable_initiator_tag is not None:
655
gobject.source_remove(self.disable_initiator_tag)
1089
GLib.source_remove(self.disable_initiator_tag)
656
1090
self.disable_initiator_tag = None
657
1091
if getattr(self, "enabled", False):
658
self.disable_initiator_tag = (gobject.timeout_add
659
(timedelta_to_milliseconds
660
(timeout), self.disable))
1092
self.disable_initiator_tag = GLib.timeout_add(
1093
int(timeout.total_seconds() * 1000), self.disable)
661
1094
self.expires = datetime.datetime.utcnow() + timeout
663
1096
def need_approval(self):
664
1097
self.last_approval_request = datetime.datetime.utcnow()
666
1099
def start_checker(self):
667
1100
"""Start a new checker subprocess if one is not running.
669
1102
If a checker already exists, leave it running and do
671
1104
# The reason for not killing a running checker is that if we
676
1109
# checkers alone, the checker would have to take more time
677
1110
# than 'timeout' for the client to be disabled, which is as it
680
# If a checker exists, make sure it is not a zombie
682
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
683
except (AttributeError, OSError) as error:
684
if (isinstance(error, OSError)
685
and error.errno != errno.ECHILD):
689
logger.warning("Checker was a zombie")
690
gobject.source_remove(self.checker_callback_tag)
691
self.checker_callback(pid, status,
692
self.current_checker_command)
1113
if self.checker is not None and not self.checker.is_alive():
1114
logger.warning("Checker was not alive; joining")
693
1117
# Start a new checker if needed
694
1118
if self.checker is None:
695
1119
# Escape attributes for the shell
696
escaped_attrs = dict(
697
(attr, re.escape(unicode(getattr(self, attr))))
699
self.runtime_expansions)
1121
attr: re.escape(str(getattr(self, attr)))
1122
for attr in self.runtime_expansions}
701
1124
command = self.checker_command % escaped_attrs
702
1125
except TypeError as error:
703
1126
logger.error('Could not format string "%s"',
704
self.checker_command, exc_info=error)
705
return True # Try again later
1127
self.checker_command,
1129
return True # Try again later
706
1130
self.current_checker_command = command
708
logger.info("Starting checker %r for %s",
710
# We don't need to redirect stdout and stderr, since
711
# in normal mode, that is already done by daemon(),
712
# and in debug mode we don't want to. (Stdin is
713
# always replaced by /dev/null.)
714
self.checker = subprocess.Popen(command,
717
except OSError as error:
718
logger.error("Failed to start subprocess",
720
self.checker_callback_tag = (gobject.child_watch_add
722
self.checker_callback,
724
# The checker may have completed before the gobject
725
# watch was added. Check for this.
726
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
728
gobject.source_remove(self.checker_callback_tag)
729
self.checker_callback(pid, status, command)
730
# Re-run this periodically if run by gobject.timeout_add
1131
logger.info("Starting checker %r for %s", command,
1133
# We don't need to redirect stdout and stderr, since
1134
# in normal mode, that is already done by daemon(),
1135
# and in debug mode we don't want to. (Stdin is
1136
# always replaced by /dev/null.)
1137
# The exception is when not debugging but nevertheless
1138
# running in the foreground; use the previously
1140
popen_args = {"close_fds": True,
1143
if (not self.server_settings["debug"]
1144
and self.server_settings["foreground"]):
1145
popen_args.update({"stdout": wnull,
1147
pipe = multiprocessing.Pipe(duplex=False)
1148
self.checker = multiprocessing.Process(
1150
args=(pipe[1], subprocess.call, command),
1152
self.checker.start()
1153
self.checker_callback_tag = GLib.io_add_watch(
1154
GLib.IOChannel.unix_new(pipe[0].fileno()),
1155
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
1156
self.checker_callback, pipe[0], command)
1157
# Re-run this periodically if run by GLib.timeout_add
733
1160
def stop_checker(self):
734
1161
"""Force the checker process, if any, to stop."""
735
1162
if self.checker_callback_tag:
736
gobject.source_remove(self.checker_callback_tag)
1163
GLib.source_remove(self.checker_callback_tag)
737
1164
self.checker_callback_tag = None
738
1165
if getattr(self, "checker", None) is None:
740
1167
logger.debug("Stopping checker for %(name)s", vars(self))
742
self.checker.terminate()
744
#if self.checker.poll() is None:
745
# self.checker.kill()
746
except OSError as error:
747
if error.errno != errno.ESRCH: # No such process
1168
self.checker.terminate()
749
1169
self.checker = None
752
def dbus_service_property(dbus_interface, signature="v",
753
access="readwrite", byte_arrays=False):
1172
def dbus_service_property(dbus_interface,
754
1176
"""Decorators for marking methods of a DBusObjectWithProperties to
755
1177
become properties on the D-Bus.
757
1179
The decorated method will be called with no arguments by "Get"
758
1180
and with one argument by "Set".
760
1182
The parameters, where they are supported, are the same as
761
1183
dbus.service.method, except there is only "signature", since the
762
1184
type from Get() and the type sent to Set() is the same.
838
class DBusObjectWithProperties(dbus.service.Object):
839
"""A D-Bus object with properties.
841
Classes inheriting from this can use the dbus_service_property
842
decorator to expose methods as D-Bus properties. It exposes the
843
standard Get(), Set(), and GetAll() methods on the D-Bus.
1267
class DBusObjectWithAnnotations(dbus.service.Object):
1268
"""A D-Bus object with annotations.
1270
Classes inheriting from this can use the dbus_annotations
1271
decorator to add annotations to methods or signals.
847
1275
def _is_dbus_thing(thing):
848
1276
"""Returns a function testing if an attribute is a D-Bus thing
850
1278
If called like _is_dbus_thing("method") it returns a function
851
1279
suitable for use as predicate to inspect.getmembers().
853
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
1281
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
856
1284
def _get_all_dbus_things(self, thing):
857
1285
"""Returns a generator of (name, attribute) pairs
859
return ((getattr(athing.__get__(self), "_dbus_name",
1287
return ((getattr(athing.__get__(self), "_dbus_name", name),
861
1288
athing.__get__(self))
862
1289
for cls in self.__class__.__mro__
863
1290
for name, athing in
864
inspect.getmembers(cls,
865
self._is_dbus_thing(thing)))
1291
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1293
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1295
path_keyword='object_path',
1296
connection_keyword='connection')
1297
def Introspect(self, object_path, connection):
1298
"""Overloading of standard D-Bus method.
1300
Inserts annotation tags on methods and signals.
1302
xmlstring = dbus.service.Object.Introspect(self, object_path,
1305
document = xml.dom.minidom.parseString(xmlstring)
1307
for if_tag in document.getElementsByTagName("interface"):
1308
# Add annotation tags
1309
for typ in ("method", "signal"):
1310
for tag in if_tag.getElementsByTagName(typ):
1312
for name, prop in (self.
1313
_get_all_dbus_things(typ)):
1314
if (name == tag.getAttribute("name")
1315
and prop._dbus_interface
1316
== if_tag.getAttribute("name")):
1317
annots.update(getattr(
1318
prop, "_dbus_annotations", {}))
1319
for name, value in annots.items():
1320
ann_tag = document.createElement(
1322
ann_tag.setAttribute("name", name)
1323
ann_tag.setAttribute("value", value)
1324
tag.appendChild(ann_tag)
1325
# Add interface annotation tags
1326
for annotation, value in dict(
1327
itertools.chain.from_iterable(
1328
annotations().items()
1329
for name, annotations
1330
in self._get_all_dbus_things("interface")
1331
if name == if_tag.getAttribute("name")
1333
ann_tag = document.createElement("annotation")
1334
ann_tag.setAttribute("name", annotation)
1335
ann_tag.setAttribute("value", value)
1336
if_tag.appendChild(ann_tag)
1337
# Fix argument name for the Introspect method itself
1338
if (if_tag.getAttribute("name")
1339
== dbus.INTROSPECTABLE_IFACE):
1340
for cn in if_tag.getElementsByTagName("method"):
1341
if cn.getAttribute("name") == "Introspect":
1342
for arg in cn.getElementsByTagName("arg"):
1343
if (arg.getAttribute("direction")
1345
arg.setAttribute("name",
1347
xmlstring = document.toxml("utf-8")
1349
except (AttributeError, xml.dom.DOMException,
1350
xml.parsers.expat.ExpatError) as error:
1351
logger.error("Failed to override Introspection method",
1356
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1357
"""A D-Bus object with properties.
1359
Classes inheriting from this can use the dbus_service_property
1360
decorator to expose methods as D-Bus properties. It exposes the
1361
standard Get(), Set(), and GetAll() methods on the D-Bus.
867
1364
def _get_dbus_property(self, interface_name, property_name):
868
1365
"""Returns a bound method if one exists which is a D-Bus
869
1366
property with the specified name and interface.
871
for cls in self.__class__.__mro__:
872
for name, value in (inspect.getmembers
874
self._is_dbus_thing("property"))):
1368
for cls in self.__class__.__mro__:
1369
for name, value in inspect.getmembers(
1370
cls, self._is_dbus_thing("property")):
875
1371
if (value._dbus_name == property_name
876
1372
and value._dbus_interface == interface_name):
877
1373
return value.__get__(self)
879
1375
# No such property
880
raise DBusPropertyNotFound(self.dbus_object_path + ":"
881
+ interface_name + "."
884
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1376
raise DBusPropertyNotFound("{}:{}.{}".format(
1377
self.dbus_object_path, interface_name, property_name))
1380
def _get_all_interface_names(cls):
1381
"""Get a sequence of all interfaces supported by an object"""
1382
return (name for name in set(getattr(getattr(x, attr),
1383
"_dbus_interface", None)
1384
for x in (inspect.getmro(cls))
1386
if name is not None)
1388
@dbus.service.method(dbus.PROPERTIES_IFACE,
885
1390
out_signature="v")
886
1391
def Get(self, interface_name, property_name):
887
1392
"""Standard D-Bus property Get() method, see D-Bus standard.
1017
1521
return xmlstring
1525
dbus.OBJECT_MANAGER_IFACE
1526
except AttributeError:
1527
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1530
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1531
"""A D-Bus object with an ObjectManager.
1533
Classes inheriting from this exposes the standard
1534
GetManagedObjects call and the InterfacesAdded and
1535
InterfacesRemoved signals on the standard
1536
"org.freedesktop.DBus.ObjectManager" interface.
1538
Note: No signals are sent automatically; they must be sent
1541
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1542
out_signature="a{oa{sa{sv}}}")
1543
def GetManagedObjects(self):
1544
"""This function must be overridden"""
1545
raise NotImplementedError()
1547
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1548
signature="oa{sa{sv}}")
1549
def InterfacesAdded(self, object_path, interfaces_and_properties):
1552
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1553
def InterfacesRemoved(self, object_path, interfaces):
1556
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1558
path_keyword='object_path',
1559
connection_keyword='connection')
1560
def Introspect(self, object_path, connection):
1561
"""Overloading of standard D-Bus method.
1563
Override return argument name of GetManagedObjects to be
1564
"objpath_interfaces_and_properties"
1566
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1570
document = xml.dom.minidom.parseString(xmlstring)
1572
for if_tag in document.getElementsByTagName("interface"):
1573
# Fix argument name for the GetManagedObjects method
1574
if (if_tag.getAttribute("name")
1575
== dbus.OBJECT_MANAGER_IFACE):
1576
for cn in if_tag.getElementsByTagName("method"):
1577
if (cn.getAttribute("name")
1578
== "GetManagedObjects"):
1579
for arg in cn.getElementsByTagName("arg"):
1580
if (arg.getAttribute("direction")
1584
"objpath_interfaces"
1586
xmlstring = document.toxml("utf-8")
1588
except (AttributeError, xml.dom.DOMException,
1589
xml.parsers.expat.ExpatError) as error:
1590
logger.error("Failed to override Introspection method",
1020
1595
def datetime_to_dbus(dt, variant_level=0):
1021
1596
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1023
return dbus.String("", variant_level = variant_level)
1024
return dbus.String(dt.isoformat(),
1025
variant_level=variant_level)
1598
return dbus.String("", variant_level=variant_level)
1599
return dbus.String(dt.isoformat(), variant_level=variant_level)
1028
1602
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1381
1963
server to mandos-client
1385
1967
# Rejected - signal
1386
1968
@dbus.service.signal(_interface, signature="s")
1387
1969
def Rejected(self, reason):
1391
1973
# NeedApproval - signal
1392
1974
@dbus.service.signal(_interface, signature="tb")
1393
1975
def NeedApproval(self, timeout, default):
1395
1977
return self.need_approval()
1399
1981
# Approve - method
1400
1982
@dbus.service.method(_interface, in_signature="b")
1401
1983
def Approve(self, value):
1402
1984
self.approve(value)
1404
1986
# CheckedOK - method
1405
1987
@dbus.service.method(_interface)
1406
1988
def CheckedOK(self):
1407
1989
self.checked_ok()
1409
1991
# Enable - method
1992
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1410
1993
@dbus.service.method(_interface)
1411
1994
def Enable(self):
1415
1998
# StartChecker - method
1999
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1416
2000
@dbus.service.method(_interface)
1417
2001
def StartChecker(self):
1419
2003
self.start_checker()
1421
2005
# Disable - method
2006
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1422
2007
@dbus.service.method(_interface)
1423
2008
def Disable(self):
1427
2012
# StopChecker - method
2013
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1428
2014
@dbus.service.method(_interface)
1429
2015
def StopChecker(self):
1430
2016
self.stop_checker()
1434
2020
# ApprovalPending - property
1435
2021
@dbus_service_property(_interface, signature="b", access="read")
1436
2022
def ApprovalPending_dbus_property(self):
1437
2023
return dbus.Boolean(bool(self.approvals_pending))
1439
2025
# ApprovedByDefault - property
1440
@dbus_service_property(_interface, signature="b",
2026
@dbus_service_property(_interface,
1441
2028
access="readwrite")
1442
2029
def ApprovedByDefault_dbus_property(self, value=None):
1443
2030
if value is None: # get
1444
2031
return dbus.Boolean(self.approved_by_default)
1445
2032
self.approved_by_default = bool(value)
1447
2034
# ApprovalDelay - property
1448
@dbus_service_property(_interface, signature="t",
2035
@dbus_service_property(_interface,
1449
2037
access="readwrite")
1450
2038
def ApprovalDelay_dbus_property(self, value=None):
1451
2039
if value is None: # get
1452
return dbus.UInt64(self.approval_delay_milliseconds())
2040
return dbus.UInt64(self.approval_delay.total_seconds()
1453
2042
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1455
2044
# ApprovalDuration - property
1456
@dbus_service_property(_interface, signature="t",
2045
@dbus_service_property(_interface,
1457
2047
access="readwrite")
1458
2048
def ApprovalDuration_dbus_property(self, value=None):
1459
2049
if value is None: # get
1460
return dbus.UInt64(timedelta_to_milliseconds(
1461
self.approval_duration))
2050
return dbus.UInt64(self.approval_duration.total_seconds()
1462
2052
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1464
2054
# Name - property
2056
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1465
2057
@dbus_service_property(_interface, signature="s", access="read")
1466
2058
def Name_dbus_property(self):
1467
2059
return dbus.String(self.name)
2063
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2064
@dbus_service_property(_interface, signature="s", access="read")
2065
def KeyID_dbus_property(self):
2066
return dbus.String(self.key_id)
1469
2068
# Fingerprint - property
2070
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1470
2071
@dbus_service_property(_interface, signature="s", access="read")
1471
2072
def Fingerprint_dbus_property(self):
1472
2073
return dbus.String(self.fingerprint)
1474
2075
# Host - property
1475
@dbus_service_property(_interface, signature="s",
2076
@dbus_service_property(_interface,
1476
2078
access="readwrite")
1477
2079
def Host_dbus_property(self, value=None):
1478
2080
if value is None: # get
1479
2081
return dbus.String(self.host)
1480
self.host = unicode(value)
2082
self.host = str(value)
1482
2084
# Created - property
2086
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1483
2087
@dbus_service_property(_interface, signature="s", access="read")
1484
2088
def Created_dbus_property(self):
1485
2089
return datetime_to_dbus(self.created)
1487
2091
# LastEnabled - property
1488
2092
@dbus_service_property(_interface, signature="s", access="read")
1489
2093
def LastEnabled_dbus_property(self):
1490
2094
return datetime_to_dbus(self.last_enabled)
1492
2096
# Enabled - property
1493
@dbus_service_property(_interface, signature="b",
2097
@dbus_service_property(_interface,
1494
2099
access="readwrite")
1495
2100
def Enabled_dbus_property(self, value=None):
1496
2101
if value is None: # get
1544
2150
if (getattr(self, "disable_initiator_tag", None)
1547
gobject.source_remove(self.disable_initiator_tag)
1548
self.disable_initiator_tag = (
1549
gobject.timeout_add(
1550
timedelta_to_milliseconds(self.expires - now),
2153
GLib.source_remove(self.disable_initiator_tag)
2154
self.disable_initiator_tag = GLib.timeout_add(
2155
int((self.expires - now).total_seconds() * 1000),
1553
2158
# ExtendedTimeout - property
1554
@dbus_service_property(_interface, signature="t",
2159
@dbus_service_property(_interface,
1555
2161
access="readwrite")
1556
2162
def ExtendedTimeout_dbus_property(self, value=None):
1557
2163
if value is None: # get
1558
return dbus.UInt64(self.extended_timeout_milliseconds())
2164
return dbus.UInt64(self.extended_timeout.total_seconds()
1559
2166
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1561
2168
# Interval - property
1562
@dbus_service_property(_interface, signature="t",
2169
@dbus_service_property(_interface,
1563
2171
access="readwrite")
1564
2172
def Interval_dbus_property(self, value=None):
1565
2173
if value is None: # get
1566
return dbus.UInt64(self.interval_milliseconds())
2174
return dbus.UInt64(self.interval.total_seconds() * 1000)
1567
2175
self.interval = datetime.timedelta(0, 0, 0, value)
1568
2176
if getattr(self, "checker_initiator_tag", None) is None:
1570
2178
if self.enabled:
1571
2179
# Reschedule checker run
1572
gobject.source_remove(self.checker_initiator_tag)
1573
self.checker_initiator_tag = (gobject.timeout_add
1574
(value, self.start_checker))
1575
self.start_checker() # Start one now, too
2180
GLib.source_remove(self.checker_initiator_tag)
2181
self.checker_initiator_tag = GLib.timeout_add(
2182
value, self.start_checker)
2183
self.start_checker() # Start one now, too
1577
2185
# Checker - property
1578
@dbus_service_property(_interface, signature="s",
2186
@dbus_service_property(_interface,
1579
2188
access="readwrite")
1580
2189
def Checker_dbus_property(self, value=None):
1581
2190
if value is None: # get
1582
2191
return dbus.String(self.checker_command)
1583
self.checker_command = unicode(value)
2192
self.checker_command = str(value)
1585
2194
# CheckerRunning - property
1586
@dbus_service_property(_interface, signature="b",
2195
@dbus_service_property(_interface,
1587
2197
access="readwrite")
1588
2198
def CheckerRunning_dbus_property(self, value=None):
1589
2199
if value is None: # get
1636
2256
class ClientHandler(socketserver.BaseRequestHandler, object):
1637
2257
"""A class to handle client connections.
1639
2259
Instantiated once for each connection to handle it.
1640
2260
Note: This will run in its own forked process."""
1642
2262
def handle(self):
1643
2263
with contextlib.closing(self.server.child_pipe) as child_pipe:
1644
2264
logger.info("TCP connection from: %s",
1645
unicode(self.client_address))
2265
str(self.client_address))
1646
2266
logger.debug("Pipe FD: %d",
1647
2267
self.server.child_pipe.fileno())
1649
session = (gnutls.connection
1650
.ClientSession(self.request,
1652
.X509Credentials()))
1654
# Note: gnutls.connection.X509Credentials is really a
1655
# generic GnuTLS certificate credentials object so long as
1656
# no X.509 keys are added to it. Therefore, we can use it
1657
# here despite using OpenPGP certificates.
1659
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1660
# "+AES-256-CBC", "+SHA1",
1661
# "+COMP-NULL", "+CTYPE-OPENPGP",
2269
session = gnutls.ClientSession(self.request)
2271
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2272
# "+AES-256-CBC", "+SHA1",
2273
# "+COMP-NULL", "+CTYPE-OPENPGP",
1663
2275
# Use a fallback default, since this MUST be set.
1664
2276
priority = self.server.gnutls_priority
1665
2277
if priority is None:
1666
2278
priority = "NORMAL"
1667
(gnutls.library.functions
1668
.gnutls_priority_set_direct(session._c_object,
2279
gnutls.priority_set_direct(session._c_object,
2280
priority.encode("utf-8"),
1671
2283
# Start communication using the Mandos protocol
1672
2284
# Get protocol number
1673
2285
line = self.request.makefile().readline()
1674
2286
logger.debug("Protocol version: %r", line)
1676
2288
if int(line.strip().split()[0]) > 1:
2289
raise RuntimeError(line)
1678
2290
except (ValueError, IndexError, RuntimeError) as error:
1679
2291
logger.error("Unknown protocol version: %s", error)
1682
2294
# Start GnuTLS connection
1684
2296
session.handshake()
1685
except gnutls.errors.GNUTLSError as error:
2297
except gnutls.Error as error:
1686
2298
logger.warning("Handshake failed: %s", error)
1687
2299
# Do not run session.bye() here: the session is not
1688
2300
# established. Just abandon the request.
1690
2302
logger.debug("Handshake succeeded")
1692
2304
approval_required = False
1695
fpr = self.fingerprint(self.peer_certificate
1698
gnutls.errors.GNUTLSError) as error:
1699
logger.warning("Bad certificate: %s", error)
1701
logger.debug("Fingerprint: %s", fpr)
1704
client = ProxyClient(child_pipe, fpr,
2306
if gnutls.has_rawpk:
2309
key_id = self.key_id(
2310
self.peer_certificate(session))
2311
except (TypeError, gnutls.Error) as error:
2312
logger.warning("Bad certificate: %s", error)
2314
logger.debug("Key ID: %s", key_id)
2319
fpr = self.fingerprint(
2320
self.peer_certificate(session))
2321
except (TypeError, gnutls.Error) as error:
2322
logger.warning("Bad certificate: %s", error)
2324
logger.debug("Fingerprint: %s", fpr)
2327
client = ProxyClient(child_pipe, key_id, fpr,
1705
2328
self.client_address)
1706
2329
except KeyError:
1709
2332
if client.approval_delay:
1710
2333
delay = client.approval_delay
1711
2334
client.approvals_pending += 1
1712
2335
approval_required = True
1715
2338
if not client.enabled:
1716
2339
logger.info("Client %s is disabled",
1718
2341
if self.server.use_dbus:
1719
2342
# Emit D-Bus signal
1720
2343
client.Rejected("Disabled")
1723
2346
if client.approved or not client.approval_delay:
1724
#We are approved or approval is disabled
2347
# We are approved or approval is disabled
1726
2349
elif client.approved is None:
1727
2350
logger.info("Client %s needs approval",
1762
2383
delay -= time2 - time
1765
while sent_size < len(client.secret):
1767
sent = session.send(client.secret[sent_size:])
1768
except gnutls.errors.GNUTLSError as error:
1769
logger.warning("gnutls send failed",
1772
logger.debug("Sent: %d, remaining: %d",
1773
sent, len(client.secret)
1774
- (sent_size + sent))
2386
session.send(client.secret)
2387
except gnutls.Error as error:
2388
logger.warning("gnutls send failed",
1777
2392
logger.info("Sending secret to %s", client.name)
1778
2393
# bump the timeout using extended_timeout
1779
2394
client.bump_timeout(client.extended_timeout)
1780
2395
if self.server.use_dbus:
1781
2396
# Emit D-Bus signal
1782
2397
client.GotSecret()
1785
2400
if approval_required:
1786
2401
client.approvals_pending -= 1
1789
except gnutls.errors.GNUTLSError as error:
2404
except gnutls.Error as error:
1790
2405
logger.warning("GnuTLS bye failed",
1791
2406
exc_info=error)
1794
2409
def peer_certificate(session):
1795
"Return the peer's OpenPGP certificate as a bytestring"
1796
# If not an OpenPGP certificate...
1797
if (gnutls.library.functions
1798
.gnutls_certificate_type_get(session._c_object)
1799
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1800
# ...do the normal thing
1801
return session.peer_certificate
2410
"Return the peer's certificate as a bytestring"
2412
cert_type = gnutls.certificate_type_get2(session._c_object,
2414
except AttributeError:
2415
cert_type = gnutls.certificate_type_get(session._c_object)
2416
if gnutls.has_rawpk:
2417
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2419
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2420
# If not a valid certificate type...
2421
if cert_type not in valid_cert_types:
2422
logger.info("Cert type %r not in %r", cert_type,
2424
# ...return invalid data
1802
2426
list_size = ctypes.c_uint(1)
1803
cert_list = (gnutls.library.functions
1804
.gnutls_certificate_get_peers
2427
cert_list = (gnutls.certificate_get_peers
1805
2428
(session._c_object, ctypes.byref(list_size)))
1806
2429
if not bool(cert_list) and list_size.value != 0:
1807
raise gnutls.errors.GNUTLSError("error getting peer"
2430
raise gnutls.Error("error getting peer certificate")
1809
2431
if list_size.value == 0:
1811
2433
cert = cert_list[0]
1812
2434
return ctypes.string_at(cert.data, cert.size)
2437
def key_id(certificate):
2438
"Convert a certificate bytestring to a hexdigit key ID"
2439
# New GnuTLS "datum" with the public key
2440
datum = gnutls.datum_t(
2441
ctypes.cast(ctypes.c_char_p(certificate),
2442
ctypes.POINTER(ctypes.c_ubyte)),
2443
ctypes.c_uint(len(certificate)))
2444
# XXX all these need to be created in the gnutls "module"
2445
# New empty GnuTLS certificate
2446
pubkey = gnutls.pubkey_t()
2447
gnutls.pubkey_init(ctypes.byref(pubkey))
2448
# Import the raw public key into the certificate
2449
gnutls.pubkey_import(pubkey,
2450
ctypes.byref(datum),
2451
gnutls.X509_FMT_DER)
2452
# New buffer for the key ID
2453
buf = ctypes.create_string_buffer(32)
2454
buf_len = ctypes.c_size_t(len(buf))
2455
# Get the key ID from the raw public key into the buffer
2456
gnutls.pubkey_get_key_id(pubkey,
2457
gnutls.KEYID_USE_SHA256,
2458
ctypes.cast(ctypes.byref(buf),
2459
ctypes.POINTER(ctypes.c_ubyte)),
2460
ctypes.byref(buf_len))
2461
# Deinit the certificate
2462
gnutls.pubkey_deinit(pubkey)
2464
# Convert the buffer to a Python bytestring
2465
key_id = ctypes.string_at(buf, buf_len.value)
2466
# Convert the bytestring to hexadecimal notation
2467
hex_key_id = binascii.hexlify(key_id).upper()
1815
2471
def fingerprint(openpgp):
1816
2472
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1817
2473
# New GnuTLS "datum" with the OpenPGP public key
1818
datum = (gnutls.library.types
1819
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1822
ctypes.c_uint(len(openpgp))))
2474
datum = gnutls.datum_t(
2475
ctypes.cast(ctypes.c_char_p(openpgp),
2476
ctypes.POINTER(ctypes.c_ubyte)),
2477
ctypes.c_uint(len(openpgp)))
1823
2478
# New empty GnuTLS certificate
1824
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1825
(gnutls.library.functions
1826
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2479
crt = gnutls.openpgp_crt_t()
2480
gnutls.openpgp_crt_init(ctypes.byref(crt))
1827
2481
# Import the OpenPGP public key into the certificate
1828
(gnutls.library.functions
1829
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1830
gnutls.library.constants
1831
.GNUTLS_OPENPGP_FMT_RAW))
2482
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2483
gnutls.OPENPGP_FMT_RAW)
1832
2484
# Verify the self signature in the key
1833
2485
crtverify = ctypes.c_uint()
1834
(gnutls.library.functions
1835
.gnutls_openpgp_crt_verify_self(crt, 0,
1836
ctypes.byref(crtverify)))
2486
gnutls.openpgp_crt_verify_self(crt, 0,
2487
ctypes.byref(crtverify))
1837
2488
if crtverify.value != 0:
1838
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1839
raise (gnutls.errors.CertificateSecurityError
2489
gnutls.openpgp_crt_deinit(crt)
2490
raise gnutls.CertificateSecurityError(code
1841
2492
# New buffer for the fingerprint
1842
2493
buf = ctypes.create_string_buffer(20)
1843
2494
buf_len = ctypes.c_size_t()
1844
2495
# Get the fingerprint from the certificate into the buffer
1845
(gnutls.library.functions
1846
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1847
ctypes.byref(buf_len)))
2496
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2497
ctypes.byref(buf_len))
1848
2498
# Deinit the certificate
1849
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2499
gnutls.openpgp_crt_deinit(crt)
1850
2500
# Convert the buffer to a Python bytestring
1851
2501
fpr = ctypes.string_at(buf, buf_len.value)
1852
2502
# Convert the bytestring to hexadecimal notation
1935
2591
# socket_wrapper(), if socketfd was set.
1936
2592
socketserver.TCPServer.__init__(self, server_address,
1937
2593
RequestHandlerClass)
1939
2595
def server_bind(self):
1940
2596
"""This overrides the normal server_bind() function
1941
2597
to bind to an interface if one was specified, and also NOT to
1942
2598
bind to an address or port if they were not specified."""
2599
global SO_BINDTODEVICE
1943
2600
if self.interface is not None:
1944
2601
if SO_BINDTODEVICE is None:
1945
logger.error("SO_BINDTODEVICE does not exist;"
1946
" cannot bind to interface %s",
1950
self.socket.setsockopt(socket.SOL_SOCKET,
1952
str(self.interface + '\0'))
1953
except socket.error as error:
1954
if error.errno == errno.EPERM:
1955
logger.error("No permission to bind to"
1956
" interface %s", self.interface)
1957
elif error.errno == errno.ENOPROTOOPT:
1958
logger.error("SO_BINDTODEVICE not available;"
1959
" cannot bind to interface %s",
1961
elif error.errno == errno.ENODEV:
1962
logger.error("Interface %s does not exist,"
1963
" cannot bind", self.interface)
2602
# Fall back to a hard-coded value which seems to be
2604
logger.warning("SO_BINDTODEVICE not found, trying 25")
2605
SO_BINDTODEVICE = 25
2607
self.socket.setsockopt(
2608
socket.SOL_SOCKET, SO_BINDTODEVICE,
2609
(self.interface + "\0").encode("utf-8"))
2610
except socket.error as error:
2611
if error.errno == errno.EPERM:
2612
logger.error("No permission to bind to"
2613
" interface %s", self.interface)
2614
elif error.errno == errno.ENOPROTOOPT:
2615
logger.error("SO_BINDTODEVICE not available;"
2616
" cannot bind to interface %s",
2618
elif error.errno == errno.ENODEV:
2619
logger.error("Interface %s does not exist,"
2620
" cannot bind", self.interface)
1966
2623
# Only bind(2) the socket if we really need to.
1967
2624
if self.server_address[0] or self.server_address[1]:
2625
if self.server_address[1]:
2626
self.allow_reuse_address = True
1968
2627
if not self.server_address[0]:
1969
2628
if self.address_family == socket.AF_INET6:
1970
any_address = "::" # in6addr_any
2629
any_address = "::" # in6addr_any
1972
any_address = socket.INADDR_ANY
2631
any_address = "0.0.0.0" # INADDR_ANY
1973
2632
self.server_address = (any_address,
1974
2633
self.server_address[1])
1975
2634
elif not self.server_address[1]:
1976
self.server_address = (self.server_address[0],
2635
self.server_address = (self.server_address[0], 0)
1978
2636
# if self.interface:
1979
2637
# self.server_address = (self.server_address[0],
2005
2668
self.gnutls_priority = gnutls_priority
2006
2669
IPv6_TCPServer.__init__(self, server_address,
2007
2670
RequestHandlerClass,
2008
interface = interface,
2009
use_ipv6 = use_ipv6,
2010
socketfd = socketfd)
2671
interface=interface,
2011
2675
def server_activate(self):
2012
2676
if self.enabled:
2013
2677
return socketserver.TCPServer.server_activate(self)
2015
2679
def enable(self):
2016
2680
self.enabled = True
2018
2682
def add_pipe(self, parent_pipe, proc):
2019
2683
# Call "handle_ipc" for both data and EOF events
2020
gobject.io_add_watch(parent_pipe.fileno(),
2021
gobject.IO_IN | gobject.IO_HUP,
2022
functools.partial(self.handle_ipc,
2027
def handle_ipc(self, source, condition, parent_pipe=None,
2028
proc = None, client_object=None):
2685
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2686
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2687
functools.partial(self.handle_ipc,
2688
parent_pipe=parent_pipe,
2691
def handle_ipc(self, source, condition,
2694
client_object=None):
2029
2695
# error, or the other end of multiprocessing.Pipe has closed
2030
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2696
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2031
2697
# Wait for other process to exit
2035
2701
# Read a request from the child
2036
2702
request = parent_pipe.recv()
2037
2703
command = request[0]
2039
2705
if command == 'init':
2041
address = request[2]
2043
for c in self.clients.itervalues():
2044
if c.fingerprint == fpr:
2706
key_id = request[1].decode("ascii")
2707
fpr = request[2].decode("ascii")
2708
address = request[3]
2710
for c in self.clients.values():
2711
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2713
if key_id and c.key_id == key_id:
2716
if fpr and c.fingerprint == fpr:
2048
logger.info("Client not found for fingerprint: %s, ad"
2049
"dress: %s", fpr, address)
2720
logger.info("Client not found for key ID: %s, address"
2721
": %s", key_id or fpr, address)
2050
2722
if self.use_dbus:
2051
2723
# Emit D-Bus signal
2052
mandos_dbus_service.ClientNotFound(fpr,
2724
mandos_dbus_service.ClientNotFound(key_id or fpr,
2054
2726
parent_pipe.send(False)
2057
gobject.io_add_watch(parent_pipe.fileno(),
2058
gobject.IO_IN | gobject.IO_HUP,
2059
functools.partial(self.handle_ipc,
2730
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2731
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2732
functools.partial(self.handle_ipc,
2733
parent_pipe=parent_pipe,
2735
client_object=client))
2065
2736
parent_pipe.send(True)
2066
2737
# remove the old hook in favor of the new above hook on
2070
2741
funcname = request[1]
2071
2742
args = request[2]
2072
2743
kwargs = request[3]
2074
2745
parent_pipe.send(('data', getattr(client_object,
2075
2746
funcname)(*args,
2078
2749
if command == 'getattr':
2079
2750
attrname = request[1]
2080
if callable(client_object.__getattribute__(attrname)):
2081
parent_pipe.send(('function',))
2751
if isinstance(client_object.__getattribute__(attrname),
2752
collections.Callable):
2753
parent_pipe.send(('function', ))
2083
parent_pipe.send(('data', client_object
2084
.__getattribute__(attrname)))
2756
'data', client_object.__getattribute__(attrname)))
2086
2758
if command == 'setattr':
2087
2759
attrname = request[1]
2088
2760
value = request[2]
2089
2761
setattr(client_object, attrname, value)
2094
2766
def rfc3339_duration_to_delta(duration):
2095
2767
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2097
>>> rfc3339_duration_to_delta("P7D")
2098
datetime.timedelta(7)
2099
>>> rfc3339_duration_to_delta("PT60S")
2100
datetime.timedelta(0, 60)
2101
>>> rfc3339_duration_to_delta("PT60M")
2102
datetime.timedelta(0, 3600)
2103
>>> rfc3339_duration_to_delta("PT24H")
2104
datetime.timedelta(1)
2105
>>> rfc3339_duration_to_delta("P1W")
2106
datetime.timedelta(7)
2107
>>> rfc3339_duration_to_delta("PT5M30S")
2108
datetime.timedelta(0, 330)
2109
>>> rfc3339_duration_to_delta("P1DT3M20S")
2110
datetime.timedelta(1, 200)
2769
>>> rfc3339_duration_to_delta("P7D") == datetime.timedelta(7)
2771
>>> rfc3339_duration_to_delta("PT60S") == datetime.timedelta(0, 60)
2773
>>> rfc3339_duration_to_delta("PT60M") == datetime.timedelta(0, 3600)
2775
>>> rfc3339_duration_to_delta("PT24H") == datetime.timedelta(1)
2777
>>> rfc3339_duration_to_delta("P1W") == datetime.timedelta(7)
2779
>>> rfc3339_duration_to_delta("PT5M30S") == datetime.timedelta(0, 330)
2781
>>> rfc3339_duration_to_delta("P1DT3M20S") == datetime.timedelta(1, 200)
2113
2785
# Parsing an RFC 3339 duration with regular expressions is not
2114
2786
# possible - there would have to be multiple places for the same
2115
2787
# values, like seconds. The current code, while more esoteric, is
2116
2788
# cleaner without depending on a parsing library. If Python had a
2117
2789
# built-in library for parsing we would use it, but we'd like to
2118
2790
# avoid excessive use of external libraries.
2120
2792
# New type for defining tokens, syntax, and semantics all-in-one
2121
Token = collections.namedtuple("Token",
2122
("regexp", # To match token; if
2123
# "value" is not None,
2124
# must have a "group"
2126
"value", # datetime.timedelta or
2128
"followers")) # Tokens valid after
2793
Token = collections.namedtuple("Token", (
2794
"regexp", # To match token; if "value" is not None, must have
2795
# a "group" containing digits
2796
"value", # datetime.timedelta or None
2797
"followers")) # Tokens valid after this token
2130
2798
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2131
2799
# the "duration" ABNF definition in RFC 3339, Appendix A.
2132
2800
token_end = Token(re.compile(r"$"), None, frozenset())
2133
2801
token_second = Token(re.compile(r"(\d+)S"),
2134
2802
datetime.timedelta(seconds=1),
2135
frozenset((token_end,)))
2803
frozenset((token_end, )))
2136
2804
token_minute = Token(re.compile(r"(\d+)M"),
2137
2805
datetime.timedelta(minutes=1),
2138
2806
frozenset((token_second, token_end)))
2294
2965
parser.add_argument("--no-dbus", action="store_false",
2295
2966
dest="use_dbus", help="Do not provide D-Bus"
2296
" system bus interface")
2967
" system bus interface", default=None)
2297
2968
parser.add_argument("--no-ipv6", action="store_false",
2298
dest="use_ipv6", help="Do not use IPv6")
2969
dest="use_ipv6", help="Do not use IPv6",
2299
2971
parser.add_argument("--no-restore", action="store_false",
2300
2972
dest="restore", help="Do not restore stored"
2973
" state", default=None)
2302
2974
parser.add_argument("--socket", type=int,
2303
2975
help="Specify a file descriptor to a network"
2304
2976
" socket to use instead of creating one")
2305
2977
parser.add_argument("--statedir", metavar="DIR",
2306
2978
help="Directory to save/restore state in")
2307
2979
parser.add_argument("--foreground", action="store_true",
2308
help="Run in foreground")
2980
help="Run in foreground", default=None)
2981
parser.add_argument("--no-zeroconf", action="store_false",
2982
dest="zeroconf", help="Do not use Zeroconf",
2310
2985
options = parser.parse_args()
2317
2987
# Default values for config file for server-global settings
2318
server_defaults = { "interface": "",
2323
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2324
"servicename": "Mandos",
2330
"statedir": "/var/lib/mandos",
2331
"foreground": "False",
2988
if gnutls.has_rawpk:
2989
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2990
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2992
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2993
":+SIGN-DSA-SHA256")
2994
server_defaults = {"interface": "",
2998
"priority": priority,
2999
"servicename": "Mandos",
3005
"statedir": "/var/lib/mandos",
3006
"foreground": "False",
2334
3011
# Parse config file for server-global settings
2335
server_config = configparser.SafeConfigParser(server_defaults)
3012
server_config = configparser.ConfigParser(server_defaults)
2336
3013
del server_defaults
2337
server_config.read(os.path.join(options.configdir,
2339
# Convert the SafeConfigParser object to a dict
3014
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3015
# Convert the ConfigParser object to a dict
2340
3016
server_settings = server_config.defaults()
2341
3017
# Use the appropriate methods on the non-string config options
2342
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
3018
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3019
"foreground", "zeroconf"):
2343
3020
server_settings[option] = server_config.getboolean("DEFAULT",
2345
3022
if server_settings["port"]:
3138
logger.debug("Did setuid/setgid to {}:{}".format(uid,
2447
3140
except OSError as error:
3141
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3142
.format(uid, gid, os.strerror(error.errno)))
2448
3143
if error.errno != errno.EPERM:
2452
3147
# Enable all possible GnuTLS debugging
2454
3149
# "Use a log level over 10 to enable all debugging options."
2455
3150
# - GnuTLS manual
2456
gnutls.library.functions.gnutls_global_set_log_level(11)
2458
@gnutls.library.types.gnutls_log_func
3151
gnutls.global_set_log_level(11)
2459
3154
def debug_gnutls(level, string):
2460
3155
logger.debug("GnuTLS: %s", string[:-1])
2462
(gnutls.library.functions
2463
.gnutls_global_set_log_function(debug_gnutls))
3157
gnutls.global_set_log_function(debug_gnutls)
2465
3159
# Redirect stdin so all checkers get /dev/null
2466
3160
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2467
3161
os.dup2(null, sys.stdin.fileno())
2471
3165
# Need to fork before connecting to D-Bus
2472
3166
if not foreground:
2473
3167
# Close all input and output, do double fork, etc.
2476
# multiprocessing will use threads, so before we use gobject we
2477
# need to inform gobject that threads will be used.
2478
gobject.threads_init()
3170
if gi.version_info < (3, 10, 2):
3171
# multiprocessing will use threads, so before we use GLib we
3172
# need to inform GLib that threads will be used.
2480
3175
global main_loop
2481
3176
# From the Avahi example code
2482
3177
DBusGMainLoop(set_as_default=True)
2483
main_loop = gobject.MainLoop()
3178
main_loop = GLib.MainLoop()
2484
3179
bus = dbus.SystemBus()
2485
3180
# End of Avahi example code
2488
3183
bus_name = dbus.service.BusName("se.recompile.Mandos",
2489
bus, do_not_queue=True)
2490
old_bus_name = (dbus.service.BusName
2491
("se.bsnet.fukt.Mandos", bus,
2493
except dbus.exceptions.NameExistsException as e:
3186
old_bus_name = dbus.service.BusName(
3187
"se.bsnet.fukt.Mandos", bus,
3189
except dbus.exceptions.DBusException as e:
2494
3190
logger.error("Disabling D-Bus:", exc_info=e)
2495
3191
use_dbus = False
2496
3192
server_settings["use_dbus"] = False
2497
3193
tcp_server.use_dbus = False
2498
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2499
service = AvahiServiceToSyslog(name =
2500
server_settings["servicename"],
2501
servicetype = "_mandos._tcp",
2502
protocol = protocol, bus = bus)
2503
if server_settings["interface"]:
2504
service.interface = (if_nametoindex
2505
(str(server_settings["interface"])))
3195
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3196
service = AvahiServiceToSyslog(
3197
name=server_settings["servicename"],
3198
servicetype="_mandos._tcp",
3201
if server_settings["interface"]:
3202
service.interface = if_nametoindex(
3203
server_settings["interface"].encode("utf-8"))
2507
3205
global multiprocessing_manager
2508
3206
multiprocessing_manager = multiprocessing.Manager()
2510
3208
client_class = Client
2512
client_class = functools.partial(ClientDBus, bus = bus)
3210
client_class = functools.partial(ClientDBus, bus=bus)
2514
3212
client_settings = Client.config_parser(client_config)
2515
3213
old_client_settings = {}
2516
3214
clients_data = {}
3216
# This is used to redirect stdout and stderr for checker processes
3218
wnull = open(os.devnull, "w") # A writable /dev/null
3219
# Only used if server is running in foreground but not in debug
3221
if debug or not foreground:
2518
3224
# Get client data and settings from last running state.
2519
3225
if server_settings["restore"]:
2521
3227
with open(stored_state_path, "rb") as stored_state:
2522
clients_data, old_client_settings = (pickle.load
3228
if sys.version_info.major == 2:
3229
clients_data, old_client_settings = pickle.load(
3232
bytes_clients_data, bytes_old_client_settings = (
3233
pickle.load(stored_state, encoding="bytes"))
3234
# Fix bytes to strings
3237
clients_data = {(key.decode("utf-8")
3238
if isinstance(key, bytes)
3241
bytes_clients_data.items()}
3242
del bytes_clients_data
3243
for key in clients_data:
3244
value = {(k.decode("utf-8")
3245
if isinstance(k, bytes) else k): v
3247
clients_data[key].items()}
3248
clients_data[key] = value
3250
value["client_structure"] = [
3252
if isinstance(s, bytes)
3254
value["client_structure"]]
3255
# .name, .host, and .checker_command
3256
for k in ("name", "host", "checker_command"):
3257
if isinstance(value[k], bytes):
3258
value[k] = value[k].decode("utf-8")
3259
if "key_id" not in value:
3260
value["key_id"] = ""
3261
elif "fingerprint" not in value:
3262
value["fingerprint"] = ""
3263
# old_client_settings
3265
old_client_settings = {
3266
(key.decode("utf-8")
3267
if isinstance(key, bytes)
3270
bytes_old_client_settings.items()}
3271
del bytes_old_client_settings
3272
# .host and .checker_command
3273
for value in old_client_settings.values():
3274
for attribute in ("host", "checker_command"):
3275
if isinstance(value[attribute], bytes):
3276
value[attribute] = (value[attribute]
2524
3278
os.remove(stored_state_path)
2525
3279
except IOError as e:
2526
3280
if e.errno == errno.ENOENT:
2527
logger.warning("Could not load persistent state: {0}"
2528
.format(os.strerror(e.errno)))
3281
logger.warning("Could not load persistent state:"
3282
" {}".format(os.strerror(e.errno)))
2530
3284
logger.critical("Could not load persistent state:",
2533
3287
except EOFError as e:
2534
3288
logger.warning("Could not load persistent state: "
2535
"EOFError:", exc_info=e)
2537
3292
with PGPEngine() as pgp:
2538
for client_name, client in clients_data.iteritems():
3293
for client_name, client in clients_data.items():
3294
# Skip removed clients
3295
if client_name not in client_settings:
2539
3298
# Decide which value to use after restoring saved state.
2540
3299
# We have three different values: Old config file,
2541
3300
# new config file, and saved state.
2599
3358
for client_name in (set(client_settings)
2600
3359
- set(old_client_settings)):
2601
3360
clients_data[client_name] = client_settings[client_name]
2603
3362
# Create all client objects
2604
for client_name, client in clients_data.iteritems():
3363
for client_name, client in clients_data.items():
2605
3364
tcp_server.clients[client_name] = client_class(
2606
name = client_name, settings = client)
3367
server_settings=server_settings)
2608
3369
if not tcp_server.clients:
2609
3370
logger.warning("No clients defined")
2611
3372
if not foreground:
2612
3373
if pidfile is not None:
2616
pidfile.write(str(pid) + "\n".encode("utf-8"))
3377
print(pid, file=pidfile)
2617
3378
except IOError:
2618
3379
logger.error("Could not write to file %r with PID %d",
2619
3380
pidfilename, pid)
2621
3382
del pidfilename
2623
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2624
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3384
for termsig in (signal.SIGHUP, signal.SIGTERM):
3385
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3386
lambda: main_loop.quit() and False)
2627
@alternate_dbus_interfaces({"se.recompile.Mandos":
2628
"se.bsnet.fukt.Mandos"})
2629
class MandosDBusService(DBusObjectWithProperties):
3390
@alternate_dbus_interfaces(
3391
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3392
class MandosDBusService(DBusObjectWithObjectManager):
2630
3393
"""A D-Bus proxy object"""
2631
3395
def __init__(self):
2632
3396
dbus.service.Object.__init__(self, bus, "/")
2633
3398
_interface = "se.recompile.Mandos"
2635
@dbus_interface_annotations(_interface)
2637
return { "org.freedesktop.DBus.Property"
2638
".EmitsChangedSignal":
2641
3400
@dbus.service.signal(_interface, signature="o")
2642
3401
def ClientAdded(self, objpath):
2646
3405
@dbus.service.signal(_interface, signature="ss")
2647
def ClientNotFound(self, fingerprint, address):
3406
def ClientNotFound(self, key_id, address):
3410
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2651
3412
@dbus.service.signal(_interface, signature="os")
2652
3413
def ClientRemoved(self, objpath, name):
3417
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2656
3419
@dbus.service.method(_interface, out_signature="ao")
2657
3420
def GetAllClients(self):
2659
return dbus.Array(c.dbus_object_path
2661
tcp_server.clients.itervalues())
3422
return dbus.Array(c.dbus_object_path for c in
3423
tcp_server.clients.values())
3425
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2663
3427
@dbus.service.method(_interface,
2664
3428
out_signature="a{oa{sv}}")
2665
3429
def GetAllClientsWithProperties(self):
2667
3431
return dbus.Dictionary(
2668
((c.dbus_object_path, c.GetAll(""))
2669
for c in tcp_server.clients.itervalues()),
3432
{c.dbus_object_path: c.GetAll(
3433
"se.recompile.Mandos.Client")
3434
for c in tcp_server.clients.values()},
2670
3435
signature="oa{sv}")
2672
3437
@dbus.service.method(_interface, in_signature="o")
2673
3438
def RemoveClient(self, object_path):
2675
for c in tcp_server.clients.itervalues():
3440
for c in tcp_server.clients.values():
2676
3441
if c.dbus_object_path == object_path:
2677
3442
del tcp_server.clients[c.name]
2678
3443
c.remove_from_connection()
2679
# Don't signal anything except ClientRemoved
3444
# Don't signal the disabling
2680
3445
c.disable(quiet=True)
2682
self.ClientRemoved(object_path, c.name)
3446
# Emit D-Bus signal for removal
3447
self.client_removed_signal(c)
2684
3449
raise KeyError(object_path)
3453
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3454
out_signature="a{oa{sa{sv}}}")
3455
def GetManagedObjects(self):
3457
return dbus.Dictionary(
3458
{client.dbus_object_path:
3460
{interface: client.GetAll(interface)
3462
client._get_all_interface_names()})
3463
for client in tcp_server.clients.values()})
3465
def client_added_signal(self, client):
3466
"""Send the new standard signal and the old signal"""
3468
# New standard signal
3469
self.InterfacesAdded(
3470
client.dbus_object_path,
3472
{interface: client.GetAll(interface)
3474
client._get_all_interface_names()}))
3476
self.ClientAdded(client.dbus_object_path)
3478
def client_removed_signal(self, client):
3479
"""Send the new standard signal and the old signal"""
3481
# New standard signal
3482
self.InterfacesRemoved(
3483
client.dbus_object_path,
3484
client._get_all_interface_names())
3486
self.ClientRemoved(client.dbus_object_path,
2688
3489
mandos_dbus_service = MandosDBusService()
3491
# Save modules to variables to exempt the modules from being
3492
# unloaded before the function registered with atexit() is run.
3493
mp = multiprocessing
2691
3497
"Cleanup function; run on exit"
2694
multiprocessing.active_children()
3501
mp.active_children()
2695
3503
if not (tcp_server.clients or client_settings):
2698
3506
# Store client before exiting. Secrets are encrypted with key
2699
3507
# based on what config file has. If config file is
2700
3508
# removed/edited, old secret will thus be unrecovable.
2702
3510
with PGPEngine() as pgp:
2703
for client in tcp_server.clients.itervalues():
3511
for client in tcp_server.clients.values():
2704
3512
key = client_settings[client.name]["secret"]
2705
3513
client.encrypted_secret = pgp.encrypt(client.secret,
2707
3515
client_dict = {}
2709
3517
# A list of attributes that can not be pickled
2711
exclude = set(("bus", "changedstate", "secret",
2713
for name, typ in (inspect.getmembers
2714
(dbus.service.Object)):
3519
exclude = {"bus", "changedstate", "secret",
3520
"checker", "server_settings"}
3521
for name, typ in inspect.getmembers(dbus.service
2715
3523
exclude.add(name)
2717
3525
client_dict["encrypted_secret"] = (client
2718
3526
.encrypted_secret)
2719
3527
for attr in client.client_structure:
2720
3528
if attr not in exclude:
2721
3529
client_dict[attr] = getattr(client, attr)
2723
3531
clients[client.name] = client_dict
2724
3532
del client_settings[client.name]["secret"]
2727
with (tempfile.NamedTemporaryFile
2728
(mode='wb', suffix=".pickle", prefix='clients-',
2729
dir=os.path.dirname(stored_state_path),
2730
delete=False)) as stored_state:
2731
pickle.dump((clients, client_settings), stored_state)
2732
tempname=stored_state.name
3535
with tempfile.NamedTemporaryFile(
3539
dir=os.path.dirname(stored_state_path),
3540
delete=False) as stored_state:
3541
pickle.dump((clients, client_settings), stored_state,
3543
tempname = stored_state.name
2733
3544
os.rename(tempname, stored_state_path)
2734
3545
except (IOError, OSError) as e: