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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
639
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)]
664
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
670
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]
739
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
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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))
402
832
"""A representation of a client host served by this server.
405
835
approved: bool(); 'None' if not yet approved/disapproved
406
836
approval_delay: datetime.timedelta(); Time to wait for approval
407
837
approval_duration: datetime.timedelta(); Duration of one approval
408
checker: subprocess.Popen(); a running checker process used
409
to see if the client lives.
410
'None' if no process is running.
411
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
412
842
checker_command: string; External command which is run to check
413
843
if client lives. %() expansions are done at
414
844
runtime with vars(self) as dict, so that for
415
845
instance %(name)s can be used in the command.
416
checker_initiator_tag: a gobject event source tag, or None
846
checker_initiator_tag: a GLib event source tag, or None
417
847
created: datetime.datetime(); (UTC) object creation
418
848
client_structure: Object describing what attributes a client has
419
849
and is used for storing the client at exit
420
850
current_checker_command: string; current running checker_command
421
disable_initiator_tag: a gobject event source tag, or None
851
disable_initiator_tag: a GLib event source tag, or None
423
853
fingerprint: string (40 or 32 hexadecimal digits); used to
424
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
425
857
host: string; available for use by the checker command
426
858
interval: datetime.timedelta(); How often to start a new checker
427
859
last_approval_request: datetime.datetime(); (UTC) or None
590
1016
logger.info("Disabling client %s", self.name)
591
1017
if getattr(self, "disable_initiator_tag", None) is not None:
592
gobject.source_remove(self.disable_initiator_tag)
1018
GLib.source_remove(self.disable_initiator_tag)
593
1019
self.disable_initiator_tag = None
594
1020
self.expires = None
595
1021
if getattr(self, "checker_initiator_tag", None) is not None:
596
gobject.source_remove(self.checker_initiator_tag)
1022
GLib.source_remove(self.checker_initiator_tag)
597
1023
self.checker_initiator_tag = None
598
1024
self.stop_checker()
599
1025
self.enabled = False
601
1027
self.send_changedstate()
602
# 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
605
1031
def __del__(self):
608
1034
def init_checker(self):
609
1035
# Schedule a new checker to be started an 'interval' from now,
610
1036
# and every interval from then on.
611
1037
if self.checker_initiator_tag is not None:
612
gobject.source_remove(self.checker_initiator_tag)
613
self.checker_initiator_tag = (gobject.timeout_add
614
(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),
616
1042
# Schedule a disable() when 'timeout' has passed
617
1043
if self.disable_initiator_tag is not None:
618
gobject.source_remove(self.disable_initiator_tag)
619
self.disable_initiator_tag = (gobject.timeout_add
620
(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)
622
1047
# Also start a new checker *right now*.
623
1048
self.start_checker()
625
def checker_callback(self, pid, condition, command):
1050
def checker_callback(self, source, condition, connection,
626
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:
627
1058
self.checker_callback_tag = None
628
1059
self.checker = None
629
if os.WIFEXITED(condition):
630
self.last_checker_status = os.WEXITSTATUS(condition)
1062
self.last_checker_status = returncode
1063
self.last_checker_signal = None
631
1064
if self.last_checker_status == 0:
632
1065
logger.info("Checker for %(name)s succeeded",
634
1067
self.checked_ok()
636
logger.info("Checker for %(name)s failed",
1069
logger.info("Checker for %(name)s failed", vars(self))
639
1071
self.last_checker_status = -1
1072
self.last_checker_signal = -returncode
640
1073
logger.warning("Checker for %(name)s crashed?",
643
1077
def checked_ok(self):
644
1078
"""Assert that the client has been seen, alive and well."""
645
1079
self.last_checked_ok = datetime.datetime.utcnow()
646
1080
self.last_checker_status = 0
1081
self.last_checker_signal = None
647
1082
self.bump_timeout()
649
1084
def bump_timeout(self, timeout=None):
650
1085
"""Bump up the timeout for this client."""
651
1086
if timeout is None:
652
1087
timeout = self.timeout
653
1088
if self.disable_initiator_tag is not None:
654
gobject.source_remove(self.disable_initiator_tag)
1089
GLib.source_remove(self.disable_initiator_tag)
655
1090
self.disable_initiator_tag = None
656
1091
if getattr(self, "enabled", False):
657
self.disable_initiator_tag = (gobject.timeout_add
658
(timedelta_to_milliseconds
659
(timeout), self.disable))
1092
self.disable_initiator_tag = GLib.timeout_add(
1093
int(timeout.total_seconds() * 1000), self.disable)
660
1094
self.expires = datetime.datetime.utcnow() + timeout
662
1096
def need_approval(self):
663
1097
self.last_approval_request = datetime.datetime.utcnow()
665
1099
def start_checker(self):
666
1100
"""Start a new checker subprocess if one is not running.
668
1102
If a checker already exists, leave it running and do
670
1104
# The reason for not killing a running checker is that if we
675
1109
# checkers alone, the checker would have to take more time
676
1110
# than 'timeout' for the client to be disabled, which is as it
679
# If a checker exists, make sure it is not a zombie
681
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
682
except (AttributeError, OSError) as error:
683
if (isinstance(error, OSError)
684
and error.errno != errno.ECHILD):
688
logger.warning("Checker was a zombie")
689
gobject.source_remove(self.checker_callback_tag)
690
self.checker_callback(pid, status,
691
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")
692
1117
# Start a new checker if needed
693
1118
if self.checker is None:
694
1119
# Escape attributes for the shell
695
escaped_attrs = dict(
696
(attr, re.escape(unicode(getattr(self, attr))))
698
self.runtime_expansions)
1121
attr: re.escape(str(getattr(self, attr)))
1122
for attr in self.runtime_expansions}
700
1124
command = self.checker_command % escaped_attrs
701
1125
except TypeError as error:
702
1126
logger.error('Could not format string "%s"',
703
self.checker_command, exc_info=error)
704
return True # Try again later
1127
self.checker_command,
1129
return True # Try again later
705
1130
self.current_checker_command = command
707
logger.info("Starting checker %r for %s",
709
# We don't need to redirect stdout and stderr, since
710
# in normal mode, that is already done by daemon(),
711
# and in debug mode we don't want to. (Stdin is
712
# always replaced by /dev/null.)
713
self.checker = subprocess.Popen(command,
716
except OSError as error:
717
logger.error("Failed to start subprocess",
719
self.checker_callback_tag = (gobject.child_watch_add
721
self.checker_callback,
723
# The checker may have completed before the gobject
724
# watch was added. Check for this.
725
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
727
gobject.source_remove(self.checker_callback_tag)
728
self.checker_callback(pid, status, command)
729
# 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
732
1160
def stop_checker(self):
733
1161
"""Force the checker process, if any, to stop."""
734
1162
if self.checker_callback_tag:
735
gobject.source_remove(self.checker_callback_tag)
1163
GLib.source_remove(self.checker_callback_tag)
736
1164
self.checker_callback_tag = None
737
1165
if getattr(self, "checker", None) is None:
739
1167
logger.debug("Stopping checker for %(name)s", vars(self))
741
self.checker.terminate()
743
#if self.checker.poll() is None:
744
# self.checker.kill()
745
except OSError as error:
746
if error.errno != errno.ESRCH: # No such process
1168
self.checker.terminate()
748
1169
self.checker = None
751
def dbus_service_property(dbus_interface, signature="v",
752
access="readwrite", byte_arrays=False):
1172
def dbus_service_property(dbus_interface,
753
1176
"""Decorators for marking methods of a DBusObjectWithProperties to
754
1177
become properties on the D-Bus.
756
1179
The decorated method will be called with no arguments by "Get"
757
1180
and with one argument by "Set".
759
1182
The parameters, where they are supported, are the same as
760
1183
dbus.service.method, except there is only "signature", since the
761
1184
type from Get() and the type sent to Set() is the same.
837
class DBusObjectWithProperties(dbus.service.Object):
838
"""A D-Bus object with properties.
840
Classes inheriting from this can use the dbus_service_property
841
decorator to expose methods as D-Bus properties. It exposes the
842
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.
846
1275
def _is_dbus_thing(thing):
847
1276
"""Returns a function testing if an attribute is a D-Bus thing
849
1278
If called like _is_dbus_thing("method") it returns a function
850
1279
suitable for use as predicate to inspect.getmembers().
852
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
1281
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
855
1284
def _get_all_dbus_things(self, thing):
856
1285
"""Returns a generator of (name, attribute) pairs
858
return ((getattr(athing.__get__(self), "_dbus_name",
1287
return ((getattr(athing.__get__(self), "_dbus_name", name),
860
1288
athing.__get__(self))
861
1289
for cls in self.__class__.__mro__
862
1290
for name, athing in
863
inspect.getmembers(cls,
864
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.
866
1364
def _get_dbus_property(self, interface_name, property_name):
867
1365
"""Returns a bound method if one exists which is a D-Bus
868
1366
property with the specified name and interface.
870
for cls in self.__class__.__mro__:
871
for name, value in (inspect.getmembers
873
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")):
874
1371
if (value._dbus_name == property_name
875
1372
and value._dbus_interface == interface_name):
876
1373
return value.__get__(self)
878
1375
# No such property
879
raise DBusPropertyNotFound(self.dbus_object_path + ":"
880
+ interface_name + "."
883
@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,
884
1390
out_signature="v")
885
1391
def Get(self, interface_name, property_name):
886
1392
"""Standard D-Bus property Get() method, see D-Bus standard.
1016
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",
1019
1595
def datetime_to_dbus(dt, variant_level=0):
1020
1596
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1022
return dbus.String("", variant_level = variant_level)
1023
return dbus.String(dt.isoformat(),
1024
variant_level=variant_level)
1598
return dbus.String("", variant_level=variant_level)
1599
return dbus.String(dt.isoformat(), variant_level=variant_level)
1027
1602
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1380
1963
server to mandos-client
1384
1967
# Rejected - signal
1385
1968
@dbus.service.signal(_interface, signature="s")
1386
1969
def Rejected(self, reason):
1390
1973
# NeedApproval - signal
1391
1974
@dbus.service.signal(_interface, signature="tb")
1392
1975
def NeedApproval(self, timeout, default):
1394
1977
return self.need_approval()
1398
1981
# Approve - method
1399
1982
@dbus.service.method(_interface, in_signature="b")
1400
1983
def Approve(self, value):
1401
1984
self.approve(value)
1403
1986
# CheckedOK - method
1404
1987
@dbus.service.method(_interface)
1405
1988
def CheckedOK(self):
1406
1989
self.checked_ok()
1408
1991
# Enable - method
1992
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1409
1993
@dbus.service.method(_interface)
1410
1994
def Enable(self):
1414
1998
# StartChecker - method
1999
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1415
2000
@dbus.service.method(_interface)
1416
2001
def StartChecker(self):
1418
2003
self.start_checker()
1420
2005
# Disable - method
2006
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1421
2007
@dbus.service.method(_interface)
1422
2008
def Disable(self):
1426
2012
# StopChecker - method
2013
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1427
2014
@dbus.service.method(_interface)
1428
2015
def StopChecker(self):
1429
2016
self.stop_checker()
1433
2020
# ApprovalPending - property
1434
2021
@dbus_service_property(_interface, signature="b", access="read")
1435
2022
def ApprovalPending_dbus_property(self):
1436
2023
return dbus.Boolean(bool(self.approvals_pending))
1438
2025
# ApprovedByDefault - property
1439
@dbus_service_property(_interface, signature="b",
2026
@dbus_service_property(_interface,
1440
2028
access="readwrite")
1441
2029
def ApprovedByDefault_dbus_property(self, value=None):
1442
2030
if value is None: # get
1443
2031
return dbus.Boolean(self.approved_by_default)
1444
2032
self.approved_by_default = bool(value)
1446
2034
# ApprovalDelay - property
1447
@dbus_service_property(_interface, signature="t",
2035
@dbus_service_property(_interface,
1448
2037
access="readwrite")
1449
2038
def ApprovalDelay_dbus_property(self, value=None):
1450
2039
if value is None: # get
1451
return dbus.UInt64(self.approval_delay_milliseconds())
2040
return dbus.UInt64(self.approval_delay.total_seconds()
1452
2042
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1454
2044
# ApprovalDuration - property
1455
@dbus_service_property(_interface, signature="t",
2045
@dbus_service_property(_interface,
1456
2047
access="readwrite")
1457
2048
def ApprovalDuration_dbus_property(self, value=None):
1458
2049
if value is None: # get
1459
return dbus.UInt64(timedelta_to_milliseconds(
1460
self.approval_duration))
2050
return dbus.UInt64(self.approval_duration.total_seconds()
1461
2052
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1463
2054
# Name - property
2056
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1464
2057
@dbus_service_property(_interface, signature="s", access="read")
1465
2058
def Name_dbus_property(self):
1466
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)
1468
2068
# Fingerprint - property
2070
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1469
2071
@dbus_service_property(_interface, signature="s", access="read")
1470
2072
def Fingerprint_dbus_property(self):
1471
2073
return dbus.String(self.fingerprint)
1473
2075
# Host - property
1474
@dbus_service_property(_interface, signature="s",
2076
@dbus_service_property(_interface,
1475
2078
access="readwrite")
1476
2079
def Host_dbus_property(self, value=None):
1477
2080
if value is None: # get
1478
2081
return dbus.String(self.host)
1479
self.host = unicode(value)
2082
self.host = str(value)
1481
2084
# Created - property
2086
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1482
2087
@dbus_service_property(_interface, signature="s", access="read")
1483
2088
def Created_dbus_property(self):
1484
2089
return datetime_to_dbus(self.created)
1486
2091
# LastEnabled - property
1487
2092
@dbus_service_property(_interface, signature="s", access="read")
1488
2093
def LastEnabled_dbus_property(self):
1489
2094
return datetime_to_dbus(self.last_enabled)
1491
2096
# Enabled - property
1492
@dbus_service_property(_interface, signature="b",
2097
@dbus_service_property(_interface,
1493
2099
access="readwrite")
1494
2100
def Enabled_dbus_property(self, value=None):
1495
2101
if value is None: # get
1543
2150
if (getattr(self, "disable_initiator_tag", None)
1546
gobject.source_remove(self.disable_initiator_tag)
1547
self.disable_initiator_tag = (
1548
gobject.timeout_add(
1549
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),
1552
2158
# ExtendedTimeout - property
1553
@dbus_service_property(_interface, signature="t",
2159
@dbus_service_property(_interface,
1554
2161
access="readwrite")
1555
2162
def ExtendedTimeout_dbus_property(self, value=None):
1556
2163
if value is None: # get
1557
return dbus.UInt64(self.extended_timeout_milliseconds())
2164
return dbus.UInt64(self.extended_timeout.total_seconds()
1558
2166
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1560
2168
# Interval - property
1561
@dbus_service_property(_interface, signature="t",
2169
@dbus_service_property(_interface,
1562
2171
access="readwrite")
1563
2172
def Interval_dbus_property(self, value=None):
1564
2173
if value is None: # get
1565
return dbus.UInt64(self.interval_milliseconds())
2174
return dbus.UInt64(self.interval.total_seconds() * 1000)
1566
2175
self.interval = datetime.timedelta(0, 0, 0, value)
1567
2176
if getattr(self, "checker_initiator_tag", None) is None:
1569
2178
if self.enabled:
1570
2179
# Reschedule checker run
1571
gobject.source_remove(self.checker_initiator_tag)
1572
self.checker_initiator_tag = (gobject.timeout_add
1573
(value, self.start_checker))
1574
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
1576
2185
# Checker - property
1577
@dbus_service_property(_interface, signature="s",
2186
@dbus_service_property(_interface,
1578
2188
access="readwrite")
1579
2189
def Checker_dbus_property(self, value=None):
1580
2190
if value is None: # get
1581
2191
return dbus.String(self.checker_command)
1582
self.checker_command = unicode(value)
2192
self.checker_command = str(value)
1584
2194
# CheckerRunning - property
1585
@dbus_service_property(_interface, signature="b",
2195
@dbus_service_property(_interface,
1586
2197
access="readwrite")
1587
2198
def CheckerRunning_dbus_property(self, value=None):
1588
2199
if value is None: # get
1635
2256
class ClientHandler(socketserver.BaseRequestHandler, object):
1636
2257
"""A class to handle client connections.
1638
2259
Instantiated once for each connection to handle it.
1639
2260
Note: This will run in its own forked process."""
1641
2262
def handle(self):
1642
2263
with contextlib.closing(self.server.child_pipe) as child_pipe:
1643
2264
logger.info("TCP connection from: %s",
1644
unicode(self.client_address))
2265
str(self.client_address))
1645
2266
logger.debug("Pipe FD: %d",
1646
2267
self.server.child_pipe.fileno())
1648
session = (gnutls.connection
1649
.ClientSession(self.request,
1651
.X509Credentials()))
1653
# Note: gnutls.connection.X509Credentials is really a
1654
# generic GnuTLS certificate credentials object so long as
1655
# no X.509 keys are added to it. Therefore, we can use it
1656
# here despite using OpenPGP certificates.
1658
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1659
# "+AES-256-CBC", "+SHA1",
1660
# "+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",
1662
2275
# Use a fallback default, since this MUST be set.
1663
2276
priority = self.server.gnutls_priority
1664
2277
if priority is None:
1665
2278
priority = "NORMAL"
1666
(gnutls.library.functions
1667
.gnutls_priority_set_direct(session._c_object,
2279
gnutls.priority_set_direct(session._c_object,
2280
priority.encode("utf-8"),
1670
2283
# Start communication using the Mandos protocol
1671
2284
# Get protocol number
1672
2285
line = self.request.makefile().readline()
1673
2286
logger.debug("Protocol version: %r", line)
1675
2288
if int(line.strip().split()[0]) > 1:
2289
raise RuntimeError(line)
1677
2290
except (ValueError, IndexError, RuntimeError) as error:
1678
2291
logger.error("Unknown protocol version: %s", error)
1681
2294
# Start GnuTLS connection
1683
2296
session.handshake()
1684
except gnutls.errors.GNUTLSError as error:
2297
except gnutls.Error as error:
1685
2298
logger.warning("Handshake failed: %s", error)
1686
2299
# Do not run session.bye() here: the session is not
1687
2300
# established. Just abandon the request.
1689
2302
logger.debug("Handshake succeeded")
1691
2304
approval_required = False
1694
fpr = self.fingerprint(self.peer_certificate
1697
gnutls.errors.GNUTLSError) as error:
1698
logger.warning("Bad certificate: %s", error)
1700
logger.debug("Fingerprint: %s", fpr)
1703
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,
1704
2328
self.client_address)
1705
2329
except KeyError:
1708
2332
if client.approval_delay:
1709
2333
delay = client.approval_delay
1710
2334
client.approvals_pending += 1
1711
2335
approval_required = True
1714
2338
if not client.enabled:
1715
2339
logger.info("Client %s is disabled",
1717
2341
if self.server.use_dbus:
1718
2342
# Emit D-Bus signal
1719
2343
client.Rejected("Disabled")
1722
2346
if client.approved or not client.approval_delay:
1723
#We are approved or approval is disabled
2347
# We are approved or approval is disabled
1725
2349
elif client.approved is None:
1726
2350
logger.info("Client %s needs approval",
1761
2383
delay -= time2 - time
1764
while sent_size < len(client.secret):
1766
sent = session.send(client.secret[sent_size:])
1767
except gnutls.errors.GNUTLSError as error:
1768
logger.warning("gnutls send failed",
1771
logger.debug("Sent: %d, remaining: %d",
1772
sent, len(client.secret)
1773
- (sent_size + sent))
2386
session.send(client.secret)
2387
except gnutls.Error as error:
2388
logger.warning("gnutls send failed",
1776
2392
logger.info("Sending secret to %s", client.name)
1777
2393
# bump the timeout using extended_timeout
1778
2394
client.bump_timeout(client.extended_timeout)
1779
2395
if self.server.use_dbus:
1780
2396
# Emit D-Bus signal
1781
2397
client.GotSecret()
1784
2400
if approval_required:
1785
2401
client.approvals_pending -= 1
1788
except gnutls.errors.GNUTLSError as error:
2404
except gnutls.Error as error:
1789
2405
logger.warning("GnuTLS bye failed",
1790
2406
exc_info=error)
1793
2409
def peer_certificate(session):
1794
"Return the peer's OpenPGP certificate as a bytestring"
1795
# If not an OpenPGP certificate...
1796
if (gnutls.library.functions
1797
.gnutls_certificate_type_get(session._c_object)
1798
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1799
# ...do the normal thing
1800
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
1801
2426
list_size = ctypes.c_uint(1)
1802
cert_list = (gnutls.library.functions
1803
.gnutls_certificate_get_peers
2427
cert_list = (gnutls.certificate_get_peers
1804
2428
(session._c_object, ctypes.byref(list_size)))
1805
2429
if not bool(cert_list) and list_size.value != 0:
1806
raise gnutls.errors.GNUTLSError("error getting peer"
2430
raise gnutls.Error("error getting peer certificate")
1808
2431
if list_size.value == 0:
1810
2433
cert = cert_list[0]
1811
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()
1814
2471
def fingerprint(openpgp):
1815
2472
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1816
2473
# New GnuTLS "datum" with the OpenPGP public key
1817
datum = (gnutls.library.types
1818
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1821
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)))
1822
2478
# New empty GnuTLS certificate
1823
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1824
(gnutls.library.functions
1825
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2479
crt = gnutls.openpgp_crt_t()
2480
gnutls.openpgp_crt_init(ctypes.byref(crt))
1826
2481
# Import the OpenPGP public key into the certificate
1827
(gnutls.library.functions
1828
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1829
gnutls.library.constants
1830
.GNUTLS_OPENPGP_FMT_RAW))
2482
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2483
gnutls.OPENPGP_FMT_RAW)
1831
2484
# Verify the self signature in the key
1832
2485
crtverify = ctypes.c_uint()
1833
(gnutls.library.functions
1834
.gnutls_openpgp_crt_verify_self(crt, 0,
1835
ctypes.byref(crtverify)))
2486
gnutls.openpgp_crt_verify_self(crt, 0,
2487
ctypes.byref(crtverify))
1836
2488
if crtverify.value != 0:
1837
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1838
raise (gnutls.errors.CertificateSecurityError
2489
gnutls.openpgp_crt_deinit(crt)
2490
raise gnutls.CertificateSecurityError(code
1840
2492
# New buffer for the fingerprint
1841
2493
buf = ctypes.create_string_buffer(20)
1842
2494
buf_len = ctypes.c_size_t()
1843
2495
# Get the fingerprint from the certificate into the buffer
1844
(gnutls.library.functions
1845
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1846
ctypes.byref(buf_len)))
2496
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2497
ctypes.byref(buf_len))
1847
2498
# Deinit the certificate
1848
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2499
gnutls.openpgp_crt_deinit(crt)
1849
2500
# Convert the buffer to a Python bytestring
1850
2501
fpr = ctypes.string_at(buf, buf_len.value)
1851
2502
# Convert the bytestring to hexadecimal notation
1934
2591
# socket_wrapper(), if socketfd was set.
1935
2592
socketserver.TCPServer.__init__(self, server_address,
1936
2593
RequestHandlerClass)
1938
2595
def server_bind(self):
1939
2596
"""This overrides the normal server_bind() function
1940
2597
to bind to an interface if one was specified, and also NOT to
1941
2598
bind to an address or port if they were not specified."""
2599
global SO_BINDTODEVICE
1942
2600
if self.interface is not None:
1943
2601
if SO_BINDTODEVICE is None:
1944
logger.error("SO_BINDTODEVICE does not exist;"
1945
" cannot bind to interface %s",
1949
self.socket.setsockopt(socket.SOL_SOCKET,
1953
except socket.error as error:
1954
if error.errno == errno.EPERM:
1955
logger.error("No permission to"
1956
" bind to interface %s",
1958
elif error.errno == errno.ENOPROTOOPT:
1959
logger.error("SO_BINDTODEVICE not available;"
1960
" cannot bind to interface %s",
1962
elif error.errno == errno.ENODEV:
1963
logger.error("Interface %s does not"
1964
" exist, cannot bind",
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)
1968
2623
# Only bind(2) the socket if we really need to.
1969
2624
if self.server_address[0] or self.server_address[1]:
2625
if self.server_address[1]:
2626
self.allow_reuse_address = True
1970
2627
if not self.server_address[0]:
1971
2628
if self.address_family == socket.AF_INET6:
1972
any_address = "::" # in6addr_any
2629
any_address = "::" # in6addr_any
1974
any_address = socket.INADDR_ANY
2631
any_address = "0.0.0.0" # INADDR_ANY
1975
2632
self.server_address = (any_address,
1976
2633
self.server_address[1])
1977
2634
elif not self.server_address[1]:
1978
self.server_address = (self.server_address[0],
2635
self.server_address = (self.server_address[0], 0)
1980
2636
# if self.interface:
1981
2637
# self.server_address = (self.server_address[0],
2007
2668
self.gnutls_priority = gnutls_priority
2008
2669
IPv6_TCPServer.__init__(self, server_address,
2009
2670
RequestHandlerClass,
2010
interface = interface,
2011
use_ipv6 = use_ipv6,
2012
socketfd = socketfd)
2671
interface=interface,
2013
2675
def server_activate(self):
2014
2676
if self.enabled:
2015
2677
return socketserver.TCPServer.server_activate(self)
2017
2679
def enable(self):
2018
2680
self.enabled = True
2020
2682
def add_pipe(self, parent_pipe, proc):
2021
2683
# Call "handle_ipc" for both data and EOF events
2022
gobject.io_add_watch(parent_pipe.fileno(),
2023
gobject.IO_IN | gobject.IO_HUP,
2024
functools.partial(self.handle_ipc,
2029
def handle_ipc(self, source, condition, parent_pipe=None,
2030
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):
2031
2695
# error, or the other end of multiprocessing.Pipe has closed
2032
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2696
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2033
2697
# Wait for other process to exit
2037
2701
# Read a request from the child
2038
2702
request = parent_pipe.recv()
2039
2703
command = request[0]
2041
2705
if command == 'init':
2043
address = request[2]
2045
for c in self.clients.itervalues():
2046
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:
2050
logger.info("Client not found for fingerprint: %s, ad"
2051
"dress: %s", fpr, address)
2720
logger.info("Client not found for key ID: %s, address"
2721
": %s", key_id or fpr, address)
2052
2722
if self.use_dbus:
2053
2723
# Emit D-Bus signal
2054
mandos_dbus_service.ClientNotFound(fpr,
2724
mandos_dbus_service.ClientNotFound(key_id or fpr,
2056
2726
parent_pipe.send(False)
2059
gobject.io_add_watch(parent_pipe.fileno(),
2060
gobject.IO_IN | gobject.IO_HUP,
2061
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))
2067
2736
parent_pipe.send(True)
2068
2737
# remove the old hook in favor of the new above hook on
2072
2741
funcname = request[1]
2073
2742
args = request[2]
2074
2743
kwargs = request[3]
2076
2745
parent_pipe.send(('data', getattr(client_object,
2077
2746
funcname)(*args,
2080
2749
if command == 'getattr':
2081
2750
attrname = request[1]
2082
if callable(client_object.__getattribute__(attrname)):
2083
parent_pipe.send(('function',))
2751
if isinstance(client_object.__getattribute__(attrname),
2752
collections.Callable):
2753
parent_pipe.send(('function', ))
2085
parent_pipe.send(('data', client_object
2086
.__getattribute__(attrname)))
2756
'data', client_object.__getattribute__(attrname)))
2088
2758
if command == 'setattr':
2089
2759
attrname = request[1]
2090
2760
value = request[2]
2091
2761
setattr(client_object, attrname, value)
2766
def rfc3339_duration_to_delta(duration):
2767
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
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)
2785
# Parsing an RFC 3339 duration with regular expressions is not
2786
# possible - there would have to be multiple places for the same
2787
# values, like seconds. The current code, while more esoteric, is
2788
# cleaner without depending on a parsing library. If Python had a
2789
# built-in library for parsing we would use it, but we'd like to
2790
# avoid excessive use of external libraries.
2792
# New type for defining tokens, syntax, and semantics all-in-one
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
2798
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2799
# the "duration" ABNF definition in RFC 3339, Appendix A.
2800
token_end = Token(re.compile(r"$"), None, frozenset())
2801
token_second = Token(re.compile(r"(\d+)S"),
2802
datetime.timedelta(seconds=1),
2803
frozenset((token_end, )))
2804
token_minute = Token(re.compile(r"(\d+)M"),
2805
datetime.timedelta(minutes=1),
2806
frozenset((token_second, token_end)))
2807
token_hour = Token(re.compile(r"(\d+)H"),
2808
datetime.timedelta(hours=1),
2809
frozenset((token_minute, token_end)))
2810
token_time = Token(re.compile(r"T"),
2812
frozenset((token_hour, token_minute,
2814
token_day = Token(re.compile(r"(\d+)D"),
2815
datetime.timedelta(days=1),
2816
frozenset((token_time, token_end)))
2817
token_month = Token(re.compile(r"(\d+)M"),
2818
datetime.timedelta(weeks=4),
2819
frozenset((token_day, token_end)))
2820
token_year = Token(re.compile(r"(\d+)Y"),
2821
datetime.timedelta(weeks=52),
2822
frozenset((token_month, token_end)))
2823
token_week = Token(re.compile(r"(\d+)W"),
2824
datetime.timedelta(weeks=1),
2825
frozenset((token_end, )))
2826
token_duration = Token(re.compile(r"P"), None,
2827
frozenset((token_year, token_month,
2828
token_day, token_time,
2830
# Define starting values:
2832
value = datetime.timedelta()
2834
# Following valid tokens
2835
followers = frozenset((token_duration, ))
2836
# String left to parse
2838
# Loop until end token is found
2839
while found_token is not token_end:
2840
# Search for any currently valid tokens
2841
for token in followers:
2842
match = token.regexp.match(s)
2843
if match is not None:
2845
if token.value is not None:
2846
# Value found, parse digits
2847
factor = int(match.group(1), 10)
2848
# Add to value so far
2849
value += factor * token.value
2850
# Strip token from string
2851
s = token.regexp.sub("", s, 1)
2854
# Set valid next tokens
2855
followers = found_token.followers
2858
# No currently valid tokens were found
2859
raise ValueError("Invalid RFC 3339 duration: {!r}"
2096
2865
def string_to_delta(interval):
2097
2866
"""Parse a string and return a datetime.timedelta
2099
>>> string_to_delta('7d')
2100
datetime.timedelta(7)
2101
>>> string_to_delta('60s')
2102
datetime.timedelta(0, 60)
2103
>>> string_to_delta('60m')
2104
datetime.timedelta(0, 3600)
2105
>>> string_to_delta('24h')
2106
datetime.timedelta(1)
2107
>>> string_to_delta('1w')
2108
datetime.timedelta(7)
2109
>>> string_to_delta('5m 30s')
2110
datetime.timedelta(0, 330)
2868
>>> string_to_delta('7d') == datetime.timedelta(7)
2870
>>> string_to_delta('60s') == datetime.timedelta(0, 60)
2872
>>> string_to_delta('60m') == datetime.timedelta(0, 3600)
2874
>>> string_to_delta('24h') == datetime.timedelta(1)
2876
>>> string_to_delta('1w') == datetime.timedelta(7)
2878
>>> string_to_delta('5m 30s') == datetime.timedelta(0, 330)
2883
return rfc3339_duration_to_delta(interval)
2112
2887
timevalue = datetime.timedelta(0)
2113
2888
for s in interval.split():
2115
suffix = unicode(s[-1])
2116
2891
value = int(s[:-1])
2117
2892
if suffix == "d":
2118
2893
delta = datetime.timedelta(value)
2191
2965
parser.add_argument("--no-dbus", action="store_false",
2192
2966
dest="use_dbus", help="Do not provide D-Bus"
2193
" system bus interface")
2967
" system bus interface", default=None)
2194
2968
parser.add_argument("--no-ipv6", action="store_false",
2195
dest="use_ipv6", help="Do not use IPv6")
2969
dest="use_ipv6", help="Do not use IPv6",
2196
2971
parser.add_argument("--no-restore", action="store_false",
2197
2972
dest="restore", help="Do not restore stored"
2973
" state", default=None)
2199
2974
parser.add_argument("--socket", type=int,
2200
2975
help="Specify a file descriptor to a network"
2201
2976
" socket to use instead of creating one")
2202
2977
parser.add_argument("--statedir", metavar="DIR",
2203
2978
help="Directory to save/restore state in")
2979
parser.add_argument("--foreground", action="store_true",
2980
help="Run in foreground", default=None)
2981
parser.add_argument("--no-zeroconf", action="store_false",
2982
dest="zeroconf", help="Do not use Zeroconf",
2205
2985
options = parser.parse_args()
2212
2987
# Default values for config file for server-global settings
2213
server_defaults = { "interface": "",
2218
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2219
"servicename": "Mandos",
2225
"statedir": "/var/lib/mandos"
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",
2228
3011
# Parse config file for server-global settings
2229
server_config = configparser.SafeConfigParser(server_defaults)
3012
server_config = configparser.ConfigParser(server_defaults)
2230
3013
del server_defaults
2231
server_config.read(os.path.join(options.configdir,
2233
# 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
2234
3016
server_settings = server_config.defaults()
2235
3017
# Use the appropriate methods on the non-string config options
2236
for option in ("debug", "use_dbus", "use_ipv6"):
3018
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3019
"foreground", "zeroconf"):
2237
3020
server_settings[option] = server_config.getboolean("DEFAULT",
2239
3022
if server_settings["port"]:
3138
logger.debug("Did setuid/setgid to {}:{}".format(uid,
2336
3140
except OSError as error:
3141
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3142
.format(uid, gid, os.strerror(error.errno)))
2337
3143
if error.errno != errno.EPERM:
2341
3147
# Enable all possible GnuTLS debugging
2343
3149
# "Use a log level over 10 to enable all debugging options."
2344
3150
# - GnuTLS manual
2345
gnutls.library.functions.gnutls_global_set_log_level(11)
2347
@gnutls.library.types.gnutls_log_func
3151
gnutls.global_set_log_level(11)
2348
3154
def debug_gnutls(level, string):
2349
3155
logger.debug("GnuTLS: %s", string[:-1])
2351
(gnutls.library.functions
2352
.gnutls_global_set_log_function(debug_gnutls))
3157
gnutls.global_set_log_function(debug_gnutls)
2354
3159
# Redirect stdin so all checkers get /dev/null
2355
3160
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2356
3161
os.dup2(null, sys.stdin.fileno())
2360
3165
# Need to fork before connecting to D-Bus
2362
3167
# Close all input and output, do double fork, etc.
2365
# multiprocessing will use threads, so before we use gobject we
2366
# need to inform gobject that threads will be used.
2367
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.
2369
3175
global main_loop
2370
3176
# From the Avahi example code
2371
3177
DBusGMainLoop(set_as_default=True)
2372
main_loop = gobject.MainLoop()
3178
main_loop = GLib.MainLoop()
2373
3179
bus = dbus.SystemBus()
2374
3180
# End of Avahi example code
2377
3183
bus_name = dbus.service.BusName("se.recompile.Mandos",
2378
bus, do_not_queue=True)
2379
old_bus_name = (dbus.service.BusName
2380
("se.bsnet.fukt.Mandos", bus,
2382
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:
2383
3190
logger.error("Disabling D-Bus:", exc_info=e)
2384
3191
use_dbus = False
2385
3192
server_settings["use_dbus"] = False
2386
3193
tcp_server.use_dbus = False
2387
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2388
service = AvahiServiceToSyslog(name =
2389
server_settings["servicename"],
2390
servicetype = "_mandos._tcp",
2391
protocol = protocol, bus = bus)
2392
if server_settings["interface"]:
2393
service.interface = (if_nametoindex
2394
(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"))
2396
3205
global multiprocessing_manager
2397
3206
multiprocessing_manager = multiprocessing.Manager()
2399
3208
client_class = Client
2401
client_class = functools.partial(ClientDBus, bus = bus)
3210
client_class = functools.partial(ClientDBus, bus=bus)
2403
3212
client_settings = Client.config_parser(client_config)
2404
3213
old_client_settings = {}
2405
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:
2407
3224
# Get client data and settings from last running state.
2408
3225
if server_settings["restore"]:
2410
3227
with open(stored_state_path, "rb") as stored_state:
2411
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]
2413
3278
os.remove(stored_state_path)
2414
3279
except IOError as e:
2415
3280
if e.errno == errno.ENOENT:
2416
logger.warning("Could not load persistent state: {0}"
2417
.format(os.strerror(e.errno)))
3281
logger.warning("Could not load persistent state:"
3282
" {}".format(os.strerror(e.errno)))
2419
3284
logger.critical("Could not load persistent state:",
2422
3287
except EOFError as e:
2423
3288
logger.warning("Could not load persistent state: "
2424
"EOFError:", exc_info=e)
2426
3292
with PGPEngine() as pgp:
2427
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:
2428
3298
# Decide which value to use after restoring saved state.
2429
3299
# We have three different values: Old config file,
2430
3300
# new config file, and saved state.
2488
3358
for client_name in (set(client_settings)
2489
3359
- set(old_client_settings)):
2490
3360
clients_data[client_name] = client_settings[client_name]
2492
3362
# Create all client objects
2493
for client_name, client in clients_data.iteritems():
3363
for client_name, client in clients_data.items():
2494
3364
tcp_server.clients[client_name] = client_class(
2495
name = client_name, settings = client)
3367
server_settings=server_settings)
2497
3369
if not tcp_server.clients:
2498
3370
logger.warning("No clients defined")
2504
pidfile.write(str(pid) + "\n".encode("utf-8"))
2507
logger.error("Could not write to file %r with PID %d",
2510
# "pidfile" was never created
3373
if pidfile is not None:
3377
print(pid, file=pidfile)
3379
logger.error("Could not write to file %r with PID %d",
2512
3382
del pidfilename
2514
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2515
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)
2518
@alternate_dbus_interfaces({"se.recompile.Mandos":
2519
"se.bsnet.fukt.Mandos"})
2520
class MandosDBusService(DBusObjectWithProperties):
3390
@alternate_dbus_interfaces(
3391
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3392
class MandosDBusService(DBusObjectWithObjectManager):
2521
3393
"""A D-Bus proxy object"""
2522
3395
def __init__(self):
2523
3396
dbus.service.Object.__init__(self, bus, "/")
2524
3398
_interface = "se.recompile.Mandos"
2526
@dbus_interface_annotations(_interface)
2528
return { "org.freedesktop.DBus.Property"
2529
".EmitsChangedSignal":
2532
3400
@dbus.service.signal(_interface, signature="o")
2533
3401
def ClientAdded(self, objpath):
2537
3405
@dbus.service.signal(_interface, signature="ss")
2538
def ClientNotFound(self, fingerprint, address):
3406
def ClientNotFound(self, key_id, address):
3410
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2542
3412
@dbus.service.signal(_interface, signature="os")
2543
3413
def ClientRemoved(self, objpath, name):
3417
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2547
3419
@dbus.service.method(_interface, out_signature="ao")
2548
3420
def GetAllClients(self):
2550
return dbus.Array(c.dbus_object_path
2552
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":
2554
3427
@dbus.service.method(_interface,
2555
3428
out_signature="a{oa{sv}}")
2556
3429
def GetAllClientsWithProperties(self):
2558
3431
return dbus.Dictionary(
2559
((c.dbus_object_path, c.GetAll(""))
2560
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()},
2561
3435
signature="oa{sv}")
2563
3437
@dbus.service.method(_interface, in_signature="o")
2564
3438
def RemoveClient(self, object_path):
2566
for c in tcp_server.clients.itervalues():
3440
for c in tcp_server.clients.values():
2567
3441
if c.dbus_object_path == object_path:
2568
3442
del tcp_server.clients[c.name]
2569
3443
c.remove_from_connection()
2570
# Don't signal anything except ClientRemoved
3444
# Don't signal the disabling
2571
3445
c.disable(quiet=True)
2573
self.ClientRemoved(object_path, c.name)
3446
# Emit D-Bus signal for removal
3447
self.client_removed_signal(c)
2575
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,
2579
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
2582
3497
"Cleanup function; run on exit"
2585
multiprocessing.active_children()
3501
mp.active_children()
2586
3503
if not (tcp_server.clients or client_settings):
2589
3506
# Store client before exiting. Secrets are encrypted with key
2590
3507
# based on what config file has. If config file is
2591
3508
# removed/edited, old secret will thus be unrecovable.
2593
3510
with PGPEngine() as pgp:
2594
for client in tcp_server.clients.itervalues():
3511
for client in tcp_server.clients.values():
2595
3512
key = client_settings[client.name]["secret"]
2596
3513
client.encrypted_secret = pgp.encrypt(client.secret,
2598
3515
client_dict = {}
2600
3517
# A list of attributes that can not be pickled
2602
exclude = set(("bus", "changedstate", "secret",
2604
for name, typ in (inspect.getmembers
2605
(dbus.service.Object)):
3519
exclude = {"bus", "changedstate", "secret",
3520
"checker", "server_settings"}
3521
for name, typ in inspect.getmembers(dbus.service
2606
3523
exclude.add(name)
2608
3525
client_dict["encrypted_secret"] = (client
2609
3526
.encrypted_secret)
2610
3527
for attr in client.client_structure:
2611
3528
if attr not in exclude:
2612
3529
client_dict[attr] = getattr(client, attr)
2614
3531
clients[client.name] = client_dict
2615
3532
del client_settings[client.name]["secret"]
2618
with (tempfile.NamedTemporaryFile
2619
(mode='wb', suffix=".pickle", prefix='clients-',
2620
dir=os.path.dirname(stored_state_path),
2621
delete=False)) as stored_state:
2622
pickle.dump((clients, client_settings), stored_state)
2623
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
2624
3544
os.rename(tempname, stored_state_path)
2625
3545
except (IOError, OSError) as e: