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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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# Add collections.abc.Callable if it does not exist
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collections.abc.Callable
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except AttributeError:
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Callable = collections.Callable
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collections.abc = abc
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# Add shlex.quote if it does not exist
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except AttributeError:
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shlex.quote = re.escape
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# Show warnings by default
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if not sys.warnoptions:
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warnings.simplefilter("default")
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# Try to find the value of SO_BINDTODEVICE:
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# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
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# newer, and it is also the most natural place for it:
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SO_BINDTODEVICE = socket.SO_BINDTODEVICE
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except AttributeError:
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# This is where SO_BINDTODEVICE was up to and including Python
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from IN import SO_BINDTODEVICE
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except ImportError:
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SO_BINDTODEVICE = None
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# In Python 2.7 it seems to have been removed entirely.
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# Try running the C preprocessor:
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cc = subprocess.Popen(["cc", "--language=c", "-E",
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE)
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stdout = cc.communicate(
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"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
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SO_BINDTODEVICE = int(stdout.splitlines()[-1])
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except (OSError, ValueError, IndexError):
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SO_BINDTODEVICE = None
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if sys.version_info < (3, 2):
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configparser.Configparser = configparser.SafeConfigParser
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stored_state_file = "clients.pickle"
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logger = logging.getLogger()
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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):
567
session_t = ctypes.POINTER(session_int)
569
class certificate_credentials_st(ctypes.Structure):
571
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):
576
_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):
590
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:
596
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
612
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,
629
if credentials is None:
630
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,
651
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
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# Error handling functions
654
def _error_code(result):
655
"""A function to raise exceptions on errors, suitable
656
for the 'restype' attribute on ctypes functions"""
659
if result == gnutls.E_NO_CERTIFICATE_FOUND:
660
raise gnutls.CertificateSecurityError(code=result)
661
raise gnutls.Error(code=result)
663
def _retry_on_error(result, func, arguments):
664
"""A function to retry on some errors, suitable
665
for the 'errcheck' attribute on ctypes functions"""
667
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
668
return _error_code(result)
669
result = func(*arguments)
672
# Unless otherwise indicated, the function declarations below are
673
# all from the gnutls/gnutls.h C header file.
676
priority_set_direct = _library.gnutls_priority_set_direct
677
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
678
ctypes.POINTER(ctypes.c_char_p)]
679
priority_set_direct.restype = _error_code
681
init = _library.gnutls_init
682
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
683
init.restype = _error_code
685
set_default_priority = _library.gnutls_set_default_priority
686
set_default_priority.argtypes = [session_t]
687
set_default_priority.restype = _error_code
689
record_send = _library.gnutls_record_send
690
record_send.argtypes = [session_t, ctypes.c_void_p,
692
record_send.restype = ctypes.c_ssize_t
693
record_send.errcheck = _retry_on_error
695
certificate_allocate_credentials = (
696
_library.gnutls_certificate_allocate_credentials)
697
certificate_allocate_credentials.argtypes = [
698
ctypes.POINTER(certificate_credentials_t)]
699
certificate_allocate_credentials.restype = _error_code
701
certificate_free_credentials = (
702
_library.gnutls_certificate_free_credentials)
703
certificate_free_credentials.argtypes = [
704
certificate_credentials_t]
705
certificate_free_credentials.restype = None
707
handshake_set_private_extensions = (
708
_library.gnutls_handshake_set_private_extensions)
709
handshake_set_private_extensions.argtypes = [session_t,
711
handshake_set_private_extensions.restype = None
713
credentials_set = _library.gnutls_credentials_set
714
credentials_set.argtypes = [session_t, credentials_type_t,
716
credentials_set.restype = _error_code
718
strerror = _library.gnutls_strerror
719
strerror.argtypes = [ctypes.c_int]
720
strerror.restype = ctypes.c_char_p
722
certificate_type_get = _library.gnutls_certificate_type_get
723
certificate_type_get.argtypes = [session_t]
724
certificate_type_get.restype = _error_code
726
certificate_get_peers = _library.gnutls_certificate_get_peers
727
certificate_get_peers.argtypes = [session_t,
728
ctypes.POINTER(ctypes.c_uint)]
729
certificate_get_peers.restype = ctypes.POINTER(datum_t)
731
global_set_log_level = _library.gnutls_global_set_log_level
732
global_set_log_level.argtypes = [ctypes.c_int]
733
global_set_log_level.restype = None
735
global_set_log_function = _library.gnutls_global_set_log_function
736
global_set_log_function.argtypes = [log_func]
737
global_set_log_function.restype = None
739
deinit = _library.gnutls_deinit
740
deinit.argtypes = [session_t]
741
deinit.restype = None
743
handshake = _library.gnutls_handshake
744
handshake.argtypes = [session_t]
745
handshake.restype = _error_code
746
handshake.errcheck = _retry_on_error
748
transport_set_ptr = _library.gnutls_transport_set_ptr
749
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
750
transport_set_ptr.restype = None
752
bye = _library.gnutls_bye
753
bye.argtypes = [session_t, close_request_t]
754
bye.restype = _error_code
755
bye.errcheck = _retry_on_error
757
check_version = _library.gnutls_check_version
758
check_version.argtypes = [ctypes.c_char_p]
759
check_version.restype = ctypes.c_char_p
761
_need_version = b"3.3.0"
762
if check_version(_need_version) is None:
763
raise self.Error("Needs GnuTLS {} or later"
764
.format(_need_version))
766
_tls_rawpk_version = b"3.6.6"
767
has_rawpk = bool(check_version(_tls_rawpk_version))
771
class pubkey_st(ctypes.Structure):
773
pubkey_t = ctypes.POINTER(pubkey_st)
775
x509_crt_fmt_t = ctypes.c_int
777
# All the function declarations below are from gnutls/abstract.h
778
pubkey_init = _library.gnutls_pubkey_init
779
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
780
pubkey_init.restype = _error_code
782
pubkey_import = _library.gnutls_pubkey_import
783
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
785
pubkey_import.restype = _error_code
787
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
788
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
789
ctypes.POINTER(ctypes.c_ubyte),
790
ctypes.POINTER(ctypes.c_size_t)]
791
pubkey_get_key_id.restype = _error_code
793
pubkey_deinit = _library.gnutls_pubkey_deinit
794
pubkey_deinit.argtypes = [pubkey_t]
795
pubkey_deinit.restype = None
797
# All the function declarations below are from gnutls/openpgp.h
799
openpgp_crt_init = _library.gnutls_openpgp_crt_init
800
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
801
openpgp_crt_init.restype = _error_code
803
openpgp_crt_import = _library.gnutls_openpgp_crt_import
804
openpgp_crt_import.argtypes = [openpgp_crt_t,
805
ctypes.POINTER(datum_t),
807
openpgp_crt_import.restype = _error_code
809
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
810
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
811
ctypes.POINTER(ctypes.c_uint)]
812
openpgp_crt_verify_self.restype = _error_code
814
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
815
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
816
openpgp_crt_deinit.restype = None
818
openpgp_crt_get_fingerprint = (
819
_library.gnutls_openpgp_crt_get_fingerprint)
820
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
824
openpgp_crt_get_fingerprint.restype = _error_code
826
if check_version(b"3.6.4"):
827
certificate_type_get2 = _library.gnutls_certificate_type_get2
828
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
829
certificate_type_get2.restype = _error_code
831
# Remove non-public functions
832
del _error_code, _retry_on_error
835
def call_pipe(connection, # : multiprocessing.Connection
836
func, *args, **kwargs):
837
"""This function is meant to be called by multiprocessing.Process
839
This function runs func(*args, **kwargs), and writes the resulting
840
return value on the provided multiprocessing.Connection.
842
connection.send(func(*args, **kwargs))
402
847
"""A representation of a client host served by this server.
405
850
approved: bool(); 'None' if not yet approved/disapproved
406
851
approval_delay: datetime.timedelta(); Time to wait for approval
407
852
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
853
checker: multiprocessing.Process(); a running checker process used
854
to see if the client lives. 'None' if no process is
856
checker_callback_tag: a GLib event source tag, or None
412
857
checker_command: string; External command which is run to check
413
858
if client lives. %() expansions are done at
414
859
runtime with vars(self) as dict, so that for
415
860
instance %(name)s can be used in the command.
416
checker_initiator_tag: a gobject event source tag, or None
861
checker_initiator_tag: a GLib event source tag, or None
417
862
created: datetime.datetime(); (UTC) object creation
418
863
client_structure: Object describing what attributes a client has
419
864
and is used for storing the client at exit
420
865
current_checker_command: string; current running checker_command
421
disable_initiator_tag: a gobject event source tag, or None
866
disable_initiator_tag: a GLib event source tag, or None
423
868
fingerprint: string (40 or 32 hexadecimal digits); used to
424
uniquely identify the client
869
uniquely identify an OpenPGP client
870
key_id: string (64 hexadecimal digits); used to uniquely identify
871
a client using raw public keys
425
872
host: string; available for use by the checker command
426
873
interval: datetime.timedelta(); How often to start a new checker
427
874
last_approval_request: datetime.datetime(); (UTC) or None
590
1031
logger.info("Disabling client %s", self.name)
591
1032
if getattr(self, "disable_initiator_tag", None) is not None:
592
gobject.source_remove(self.disable_initiator_tag)
1033
GLib.source_remove(self.disable_initiator_tag)
593
1034
self.disable_initiator_tag = None
594
1035
self.expires = None
595
1036
if getattr(self, "checker_initiator_tag", None) is not None:
596
gobject.source_remove(self.checker_initiator_tag)
1037
GLib.source_remove(self.checker_initiator_tag)
597
1038
self.checker_initiator_tag = None
598
1039
self.stop_checker()
599
1040
self.enabled = False
601
1042
self.send_changedstate()
602
# Do not run this again if called by a gobject.timeout_add
1043
# Do not run this again if called by a GLib.timeout_add
605
1046
def __del__(self):
608
1049
def init_checker(self):
609
1050
# Schedule a new checker to be started an 'interval' from now,
610
1051
# and every interval from then on.
611
1052
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(),
1053
GLib.source_remove(self.checker_initiator_tag)
1054
self.checker_initiator_tag = GLib.timeout_add(
1055
random.randrange(int(self.interval.total_seconds() * 1000
616
1058
# Schedule a disable() when 'timeout' has passed
617
1059
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(),
1060
GLib.source_remove(self.disable_initiator_tag)
1061
self.disable_initiator_tag = GLib.timeout_add(
1062
int(self.timeout.total_seconds() * 1000), self.disable)
622
1063
# Also start a new checker *right now*.
623
1064
self.start_checker()
625
def checker_callback(self, pid, condition, command):
1066
def checker_callback(self, source, condition, connection,
626
1068
"""The checker has completed, so take appropriate actions."""
1069
# Read return code from connection (see call_pipe)
1070
returncode = connection.recv()
1072
if self.checker is not None:
627
1074
self.checker_callback_tag = None
628
1075
self.checker = None
629
if os.WIFEXITED(condition):
630
self.last_checker_status = os.WEXITSTATUS(condition)
1078
self.last_checker_status = returncode
1079
self.last_checker_signal = None
631
1080
if self.last_checker_status == 0:
632
1081
logger.info("Checker for %(name)s succeeded",
634
1083
self.checked_ok()
636
logger.info("Checker for %(name)s failed",
1085
logger.info("Checker for %(name)s failed", vars(self))
639
1087
self.last_checker_status = -1
1088
self.last_checker_signal = -returncode
640
1089
logger.warning("Checker for %(name)s crashed?",
643
1093
def checked_ok(self):
644
1094
"""Assert that the client has been seen, alive and well."""
645
1095
self.last_checked_ok = datetime.datetime.utcnow()
646
1096
self.last_checker_status = 0
1097
self.last_checker_signal = None
647
1098
self.bump_timeout()
649
1100
def bump_timeout(self, timeout=None):
650
1101
"""Bump up the timeout for this client."""
651
1102
if timeout is None:
652
1103
timeout = self.timeout
653
1104
if self.disable_initiator_tag is not None:
654
gobject.source_remove(self.disable_initiator_tag)
1105
GLib.source_remove(self.disable_initiator_tag)
655
1106
self.disable_initiator_tag = None
656
1107
if getattr(self, "enabled", False):
657
self.disable_initiator_tag = (gobject.timeout_add
658
(timedelta_to_milliseconds
659
(timeout), self.disable))
1108
self.disable_initiator_tag = GLib.timeout_add(
1109
int(timeout.total_seconds() * 1000), self.disable)
660
1110
self.expires = datetime.datetime.utcnow() + timeout
662
1112
def need_approval(self):
663
1113
self.last_approval_request = datetime.datetime.utcnow()
665
1115
def start_checker(self):
666
1116
"""Start a new checker subprocess if one is not running.
668
1118
If a checker already exists, leave it running and do
670
1120
# The reason for not killing a running checker is that if we
675
1125
# checkers alone, the checker would have to take more time
676
1126
# 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)
1129
if self.checker is not None and not self.checker.is_alive():
1130
logger.warning("Checker was not alive; joining")
692
1133
# Start a new checker if needed
693
1134
if self.checker is None:
694
1135
# Escape attributes for the shell
695
escaped_attrs = dict(
696
(attr, re.escape(unicode(getattr(self, attr))))
698
self.runtime_expansions)
1137
attr: shlex.quote(str(getattr(self, attr)))
1138
for attr in self.runtime_expansions}
700
1140
command = self.checker_command % escaped_attrs
701
1141
except TypeError as error:
702
1142
logger.error('Could not format string "%s"',
703
self.checker_command, exc_info=error)
704
return True # Try again later
1143
self.checker_command,
1145
return True # Try again later
705
1146
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
1147
logger.info("Starting checker %r for %s", command,
1149
# We don't need to redirect stdout and stderr, since
1150
# in normal mode, that is already done by daemon(),
1151
# and in debug mode we don't want to. (Stdin is
1152
# always replaced by /dev/null.)
1153
# The exception is when not debugging but nevertheless
1154
# running in the foreground; use the previously
1156
popen_args = {"close_fds": True,
1159
if (not self.server_settings["debug"]
1160
and self.server_settings["foreground"]):
1161
popen_args.update({"stdout": wnull,
1163
pipe = multiprocessing.Pipe(duplex=False)
1164
self.checker = multiprocessing.Process(
1166
args=(pipe[1], subprocess.call, command),
1168
self.checker.start()
1169
self.checker_callback_tag = GLib.io_add_watch(
1170
GLib.IOChannel.unix_new(pipe[0].fileno()),
1171
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
1172
self.checker_callback, pipe[0], command)
1173
# Re-run this periodically if run by GLib.timeout_add
732
1176
def stop_checker(self):
733
1177
"""Force the checker process, if any, to stop."""
734
1178
if self.checker_callback_tag:
735
gobject.source_remove(self.checker_callback_tag)
1179
GLib.source_remove(self.checker_callback_tag)
736
1180
self.checker_callback_tag = None
737
1181
if getattr(self, "checker", None) is None:
739
1183
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
1184
self.checker.terminate()
748
1185
self.checker = None
751
def dbus_service_property(dbus_interface, signature="v",
752
access="readwrite", byte_arrays=False):
1188
def dbus_service_property(dbus_interface,
753
1192
"""Decorators for marking methods of a DBusObjectWithProperties to
754
1193
become properties on the D-Bus.
756
1195
The decorated method will be called with no arguments by "Get"
757
1196
and with one argument by "Set".
759
1198
The parameters, where they are supported, are the same as
760
1199
dbus.service.method, except there is only "signature", since the
761
1200
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.
1283
class DBusObjectWithAnnotations(dbus.service.Object):
1284
"""A D-Bus object with annotations.
1286
Classes inheriting from this can use the dbus_annotations
1287
decorator to add annotations to methods or signals.
846
1291
def _is_dbus_thing(thing):
847
1292
"""Returns a function testing if an attribute is a D-Bus thing
849
1294
If called like _is_dbus_thing("method") it returns a function
850
1295
suitable for use as predicate to inspect.getmembers().
852
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
1297
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
855
1300
def _get_all_dbus_things(self, thing):
856
1301
"""Returns a generator of (name, attribute) pairs
858
return ((getattr(athing.__get__(self), "_dbus_name",
1303
return ((getattr(athing.__get__(self), "_dbus_name", name),
860
1304
athing.__get__(self))
861
1305
for cls in self.__class__.__mro__
862
1306
for name, athing in
863
inspect.getmembers(cls,
864
self._is_dbus_thing(thing)))
1307
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1309
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1311
path_keyword='object_path',
1312
connection_keyword='connection')
1313
def Introspect(self, object_path, connection):
1314
"""Overloading of standard D-Bus method.
1316
Inserts annotation tags on methods and signals.
1318
xmlstring = dbus.service.Object.Introspect(self, object_path,
1321
document = xml.dom.minidom.parseString(xmlstring)
1323
for if_tag in document.getElementsByTagName("interface"):
1324
# Add annotation tags
1325
for typ in ("method", "signal"):
1326
for tag in if_tag.getElementsByTagName(typ):
1328
for name, prop in (self.
1329
_get_all_dbus_things(typ)):
1330
if (name == tag.getAttribute("name")
1331
and prop._dbus_interface
1332
== if_tag.getAttribute("name")):
1333
annots.update(getattr(
1334
prop, "_dbus_annotations", {}))
1335
for name, value in annots.items():
1336
ann_tag = document.createElement(
1338
ann_tag.setAttribute("name", name)
1339
ann_tag.setAttribute("value", value)
1340
tag.appendChild(ann_tag)
1341
# Add interface annotation tags
1342
for annotation, value in dict(
1343
itertools.chain.from_iterable(
1344
annotations().items()
1345
for name, annotations
1346
in self._get_all_dbus_things("interface")
1347
if name == if_tag.getAttribute("name")
1349
ann_tag = document.createElement("annotation")
1350
ann_tag.setAttribute("name", annotation)
1351
ann_tag.setAttribute("value", value)
1352
if_tag.appendChild(ann_tag)
1353
# Fix argument name for the Introspect method itself
1354
if (if_tag.getAttribute("name")
1355
== dbus.INTROSPECTABLE_IFACE):
1356
for cn in if_tag.getElementsByTagName("method"):
1357
if cn.getAttribute("name") == "Introspect":
1358
for arg in cn.getElementsByTagName("arg"):
1359
if (arg.getAttribute("direction")
1361
arg.setAttribute("name",
1363
xmlstring = document.toxml("utf-8")
1365
except (AttributeError, xml.dom.DOMException,
1366
xml.parsers.expat.ExpatError) as error:
1367
logger.error("Failed to override Introspection method",
1372
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1373
"""A D-Bus object with properties.
1375
Classes inheriting from this can use the dbus_service_property
1376
decorator to expose methods as D-Bus properties. It exposes the
1377
standard Get(), Set(), and GetAll() methods on the D-Bus.
866
1380
def _get_dbus_property(self, interface_name, property_name):
867
1381
"""Returns a bound method if one exists which is a D-Bus
868
1382
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"))):
1384
for cls in self.__class__.__mro__:
1385
for name, value in inspect.getmembers(
1386
cls, self._is_dbus_thing("property")):
874
1387
if (value._dbus_name == property_name
875
1388
and value._dbus_interface == interface_name):
876
1389
return value.__get__(self)
878
1391
# No such property
879
raise DBusPropertyNotFound(self.dbus_object_path + ":"
880
+ interface_name + "."
883
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1392
raise DBusPropertyNotFound("{}:{}.{}".format(
1393
self.dbus_object_path, interface_name, property_name))
1396
def _get_all_interface_names(cls):
1397
"""Get a sequence of all interfaces supported by an object"""
1398
return (name for name in set(getattr(getattr(x, attr),
1399
"_dbus_interface", None)
1400
for x in (inspect.getmro(cls))
1402
if name is not None)
1404
@dbus.service.method(dbus.PROPERTIES_IFACE,
884
1406
out_signature="v")
885
1407
def Get(self, interface_name, property_name):
886
1408
"""Standard D-Bus property Get() method, see D-Bus standard.
1016
1536
return xmlstring
1540
dbus.OBJECT_MANAGER_IFACE
1541
except AttributeError:
1542
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1545
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1546
"""A D-Bus object with an ObjectManager.
1548
Classes inheriting from this exposes the standard
1549
GetManagedObjects call and the InterfacesAdded and
1550
InterfacesRemoved signals on the standard
1551
"org.freedesktop.DBus.ObjectManager" interface.
1553
Note: No signals are sent automatically; they must be sent
1556
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1557
out_signature="a{oa{sa{sv}}}")
1558
def GetManagedObjects(self):
1559
"""This function must be overridden"""
1560
raise NotImplementedError()
1562
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1563
signature="oa{sa{sv}}")
1564
def InterfacesAdded(self, object_path, interfaces_and_properties):
1567
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1568
def InterfacesRemoved(self, object_path, interfaces):
1571
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1573
path_keyword='object_path',
1574
connection_keyword='connection')
1575
def Introspect(self, object_path, connection):
1576
"""Overloading of standard D-Bus method.
1578
Override return argument name of GetManagedObjects to be
1579
"objpath_interfaces_and_properties"
1581
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1585
document = xml.dom.minidom.parseString(xmlstring)
1587
for if_tag in document.getElementsByTagName("interface"):
1588
# Fix argument name for the GetManagedObjects method
1589
if (if_tag.getAttribute("name")
1590
== dbus.OBJECT_MANAGER_IFACE):
1591
for cn in if_tag.getElementsByTagName("method"):
1592
if (cn.getAttribute("name")
1593
== "GetManagedObjects"):
1594
for arg in cn.getElementsByTagName("arg"):
1595
if (arg.getAttribute("direction")
1599
"objpath_interfaces"
1601
xmlstring = document.toxml("utf-8")
1603
except (AttributeError, xml.dom.DOMException,
1604
xml.parsers.expat.ExpatError) as error:
1605
logger.error("Failed to override Introspection method",
1019
1610
def datetime_to_dbus(dt, variant_level=0):
1020
1611
"""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)
1613
return dbus.String("", variant_level=variant_level)
1614
return dbus.String(dt.isoformat(), variant_level=variant_level)
1027
1617
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1380
1978
server to mandos-client
1384
1982
# Rejected - signal
1385
1983
@dbus.service.signal(_interface, signature="s")
1386
1984
def Rejected(self, reason):
1390
1988
# NeedApproval - signal
1391
1989
@dbus.service.signal(_interface, signature="tb")
1392
1990
def NeedApproval(self, timeout, default):
1394
1992
return self.need_approval()
1398
1996
# Approve - method
1399
1997
@dbus.service.method(_interface, in_signature="b")
1400
1998
def Approve(self, value):
1401
1999
self.approve(value)
1403
2001
# CheckedOK - method
1404
2002
@dbus.service.method(_interface)
1405
2003
def CheckedOK(self):
1406
2004
self.checked_ok()
1408
2006
# Enable - method
2007
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1409
2008
@dbus.service.method(_interface)
1410
2009
def Enable(self):
1414
2013
# StartChecker - method
2014
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1415
2015
@dbus.service.method(_interface)
1416
2016
def StartChecker(self):
1418
2018
self.start_checker()
1420
2020
# Disable - method
2021
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1421
2022
@dbus.service.method(_interface)
1422
2023
def Disable(self):
1426
2027
# StopChecker - method
2028
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1427
2029
@dbus.service.method(_interface)
1428
2030
def StopChecker(self):
1429
2031
self.stop_checker()
1433
2035
# ApprovalPending - property
1434
2036
@dbus_service_property(_interface, signature="b", access="read")
1435
2037
def ApprovalPending_dbus_property(self):
1436
2038
return dbus.Boolean(bool(self.approvals_pending))
1438
2040
# ApprovedByDefault - property
1439
@dbus_service_property(_interface, signature="b",
2041
@dbus_service_property(_interface,
1440
2043
access="readwrite")
1441
2044
def ApprovedByDefault_dbus_property(self, value=None):
1442
2045
if value is None: # get
1443
2046
return dbus.Boolean(self.approved_by_default)
1444
2047
self.approved_by_default = bool(value)
1446
2049
# ApprovalDelay - property
1447
@dbus_service_property(_interface, signature="t",
2050
@dbus_service_property(_interface,
1448
2052
access="readwrite")
1449
2053
def ApprovalDelay_dbus_property(self, value=None):
1450
2054
if value is None: # get
1451
return dbus.UInt64(self.approval_delay_milliseconds())
2055
return dbus.UInt64(self.approval_delay.total_seconds()
1452
2057
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1454
2059
# ApprovalDuration - property
1455
@dbus_service_property(_interface, signature="t",
2060
@dbus_service_property(_interface,
1456
2062
access="readwrite")
1457
2063
def ApprovalDuration_dbus_property(self, value=None):
1458
2064
if value is None: # get
1459
return dbus.UInt64(timedelta_to_milliseconds(
1460
self.approval_duration))
2065
return dbus.UInt64(self.approval_duration.total_seconds()
1461
2067
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1463
2069
# Name - property
2071
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1464
2072
@dbus_service_property(_interface, signature="s", access="read")
1465
2073
def Name_dbus_property(self):
1466
2074
return dbus.String(self.name)
2078
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2079
@dbus_service_property(_interface, signature="s", access="read")
2080
def KeyID_dbus_property(self):
2081
return dbus.String(self.key_id)
1468
2083
# Fingerprint - property
2085
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1469
2086
@dbus_service_property(_interface, signature="s", access="read")
1470
2087
def Fingerprint_dbus_property(self):
1471
2088
return dbus.String(self.fingerprint)
1473
2090
# Host - property
1474
@dbus_service_property(_interface, signature="s",
2091
@dbus_service_property(_interface,
1475
2093
access="readwrite")
1476
2094
def Host_dbus_property(self, value=None):
1477
2095
if value is None: # get
1478
2096
return dbus.String(self.host)
1479
self.host = unicode(value)
2097
self.host = str(value)
1481
2099
# Created - property
2101
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1482
2102
@dbus_service_property(_interface, signature="s", access="read")
1483
2103
def Created_dbus_property(self):
1484
2104
return datetime_to_dbus(self.created)
1486
2106
# LastEnabled - property
1487
2107
@dbus_service_property(_interface, signature="s", access="read")
1488
2108
def LastEnabled_dbus_property(self):
1489
2109
return datetime_to_dbus(self.last_enabled)
1491
2111
# Enabled - property
1492
@dbus_service_property(_interface, signature="b",
2112
@dbus_service_property(_interface,
1493
2114
access="readwrite")
1494
2115
def Enabled_dbus_property(self, value=None):
1495
2116
if value is None: # get
1543
2165
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),
2168
GLib.source_remove(self.disable_initiator_tag)
2169
self.disable_initiator_tag = GLib.timeout_add(
2170
int((self.expires - now).total_seconds() * 1000),
1552
2173
# ExtendedTimeout - property
1553
@dbus_service_property(_interface, signature="t",
2174
@dbus_service_property(_interface,
1554
2176
access="readwrite")
1555
2177
def ExtendedTimeout_dbus_property(self, value=None):
1556
2178
if value is None: # get
1557
return dbus.UInt64(self.extended_timeout_milliseconds())
2179
return dbus.UInt64(self.extended_timeout.total_seconds()
1558
2181
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1560
2183
# Interval - property
1561
@dbus_service_property(_interface, signature="t",
2184
@dbus_service_property(_interface,
1562
2186
access="readwrite")
1563
2187
def Interval_dbus_property(self, value=None):
1564
2188
if value is None: # get
1565
return dbus.UInt64(self.interval_milliseconds())
2189
return dbus.UInt64(self.interval.total_seconds() * 1000)
1566
2190
self.interval = datetime.timedelta(0, 0, 0, value)
1567
2191
if getattr(self, "checker_initiator_tag", None) is None:
1569
2193
if self.enabled:
1570
2194
# 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
2195
GLib.source_remove(self.checker_initiator_tag)
2196
self.checker_initiator_tag = GLib.timeout_add(
2197
value, self.start_checker)
2198
self.start_checker() # Start one now, too
1576
2200
# Checker - property
1577
@dbus_service_property(_interface, signature="s",
2201
@dbus_service_property(_interface,
1578
2203
access="readwrite")
1579
2204
def Checker_dbus_property(self, value=None):
1580
2205
if value is None: # get
1581
2206
return dbus.String(self.checker_command)
1582
self.checker_command = unicode(value)
2207
self.checker_command = str(value)
1584
2209
# CheckerRunning - property
1585
@dbus_service_property(_interface, signature="b",
2210
@dbus_service_property(_interface,
1586
2212
access="readwrite")
1587
2213
def CheckerRunning_dbus_property(self, value=None):
1588
2214
if value is None: # get
1635
2271
class ClientHandler(socketserver.BaseRequestHandler, object):
1636
2272
"""A class to handle client connections.
1638
2274
Instantiated once for each connection to handle it.
1639
2275
Note: This will run in its own forked process."""
1641
2277
def handle(self):
1642
2278
with contextlib.closing(self.server.child_pipe) as child_pipe:
1643
2279
logger.info("TCP connection from: %s",
1644
unicode(self.client_address))
2280
str(self.client_address))
1645
2281
logger.debug("Pipe FD: %d",
1646
2282
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",
2284
session = gnutls.ClientSession(self.request)
2286
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2287
# "+AES-256-CBC", "+SHA1",
2288
# "+COMP-NULL", "+CTYPE-OPENPGP",
1662
2290
# Use a fallback default, since this MUST be set.
1663
2291
priority = self.server.gnutls_priority
1664
2292
if priority is None:
1665
2293
priority = "NORMAL"
1666
(gnutls.library.functions
1667
.gnutls_priority_set_direct(session._c_object,
2294
gnutls.priority_set_direct(session._c_object,
2295
priority.encode("utf-8"),
1670
2298
# Start communication using the Mandos protocol
1671
2299
# Get protocol number
1672
2300
line = self.request.makefile().readline()
1673
2301
logger.debug("Protocol version: %r", line)
1675
2303
if int(line.strip().split()[0]) > 1:
2304
raise RuntimeError(line)
1677
2305
except (ValueError, IndexError, RuntimeError) as error:
1678
2306
logger.error("Unknown protocol version: %s", error)
1681
2309
# Start GnuTLS connection
1683
2311
session.handshake()
1684
except gnutls.errors.GNUTLSError as error:
2312
except gnutls.Error as error:
1685
2313
logger.warning("Handshake failed: %s", error)
1686
2314
# Do not run session.bye() here: the session is not
1687
2315
# established. Just abandon the request.
1689
2317
logger.debug("Handshake succeeded")
1691
2319
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,
2321
if gnutls.has_rawpk:
2324
key_id = self.key_id(
2325
self.peer_certificate(session))
2326
except (TypeError, gnutls.Error) as error:
2327
logger.warning("Bad certificate: %s", error)
2329
logger.debug("Key ID: %s", key_id)
2334
fpr = self.fingerprint(
2335
self.peer_certificate(session))
2336
except (TypeError, gnutls.Error) as error:
2337
logger.warning("Bad certificate: %s", error)
2339
logger.debug("Fingerprint: %s", fpr)
2342
client = ProxyClient(child_pipe, key_id, fpr,
1704
2343
self.client_address)
1705
2344
except KeyError:
1708
2347
if client.approval_delay:
1709
2348
delay = client.approval_delay
1710
2349
client.approvals_pending += 1
1711
2350
approval_required = True
1714
2353
if not client.enabled:
1715
2354
logger.info("Client %s is disabled",
1717
2356
if self.server.use_dbus:
1718
2357
# Emit D-Bus signal
1719
2358
client.Rejected("Disabled")
1722
2361
if client.approved or not client.approval_delay:
1723
#We are approved or approval is disabled
2362
# We are approved or approval is disabled
1725
2364
elif client.approved is None:
1726
2365
logger.info("Client %s needs approval",
1761
2398
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))
2401
session.send(client.secret)
2402
except gnutls.Error as error:
2403
logger.warning("gnutls send failed",
1776
2407
logger.info("Sending secret to %s", client.name)
1777
2408
# bump the timeout using extended_timeout
1778
2409
client.bump_timeout(client.extended_timeout)
1779
2410
if self.server.use_dbus:
1780
2411
# Emit D-Bus signal
1781
2412
client.GotSecret()
1784
2415
if approval_required:
1785
2416
client.approvals_pending -= 1
1788
except gnutls.errors.GNUTLSError as error:
2419
except gnutls.Error as error:
1789
2420
logger.warning("GnuTLS bye failed",
1790
2421
exc_info=error)
1793
2424
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
2425
"Return the peer's certificate as a bytestring"
2427
cert_type = gnutls.certificate_type_get2(session._c_object,
2429
except AttributeError:
2430
cert_type = gnutls.certificate_type_get(session._c_object)
2431
if gnutls.has_rawpk:
2432
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2434
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2435
# If not a valid certificate type...
2436
if cert_type not in valid_cert_types:
2437
logger.info("Cert type %r not in %r", cert_type,
2439
# ...return invalid data
1801
2441
list_size = ctypes.c_uint(1)
1802
cert_list = (gnutls.library.functions
1803
.gnutls_certificate_get_peers
2442
cert_list = (gnutls.certificate_get_peers
1804
2443
(session._c_object, ctypes.byref(list_size)))
1805
2444
if not bool(cert_list) and list_size.value != 0:
1806
raise gnutls.errors.GNUTLSError("error getting peer"
2445
raise gnutls.Error("error getting peer certificate")
1808
2446
if list_size.value == 0:
1810
2448
cert = cert_list[0]
1811
2449
return ctypes.string_at(cert.data, cert.size)
2452
def key_id(certificate):
2453
"Convert a certificate bytestring to a hexdigit key ID"
2454
# New GnuTLS "datum" with the public key
2455
datum = gnutls.datum_t(
2456
ctypes.cast(ctypes.c_char_p(certificate),
2457
ctypes.POINTER(ctypes.c_ubyte)),
2458
ctypes.c_uint(len(certificate)))
2459
# XXX all these need to be created in the gnutls "module"
2460
# New empty GnuTLS certificate
2461
pubkey = gnutls.pubkey_t()
2462
gnutls.pubkey_init(ctypes.byref(pubkey))
2463
# Import the raw public key into the certificate
2464
gnutls.pubkey_import(pubkey,
2465
ctypes.byref(datum),
2466
gnutls.X509_FMT_DER)
2467
# New buffer for the key ID
2468
buf = ctypes.create_string_buffer(32)
2469
buf_len = ctypes.c_size_t(len(buf))
2470
# Get the key ID from the raw public key into the buffer
2471
gnutls.pubkey_get_key_id(pubkey,
2472
gnutls.KEYID_USE_SHA256,
2473
ctypes.cast(ctypes.byref(buf),
2474
ctypes.POINTER(ctypes.c_ubyte)),
2475
ctypes.byref(buf_len))
2476
# Deinit the certificate
2477
gnutls.pubkey_deinit(pubkey)
2479
# Convert the buffer to a Python bytestring
2480
key_id = ctypes.string_at(buf, buf_len.value)
2481
# Convert the bytestring to hexadecimal notation
2482
hex_key_id = binascii.hexlify(key_id).upper()
1814
2486
def fingerprint(openpgp):
1815
2487
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1816
2488
# 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))))
2489
datum = gnutls.datum_t(
2490
ctypes.cast(ctypes.c_char_p(openpgp),
2491
ctypes.POINTER(ctypes.c_ubyte)),
2492
ctypes.c_uint(len(openpgp)))
1822
2493
# 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)))
2494
crt = gnutls.openpgp_crt_t()
2495
gnutls.openpgp_crt_init(ctypes.byref(crt))
1826
2496
# 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))
2497
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2498
gnutls.OPENPGP_FMT_RAW)
1831
2499
# Verify the self signature in the key
1832
2500
crtverify = ctypes.c_uint()
1833
(gnutls.library.functions
1834
.gnutls_openpgp_crt_verify_self(crt, 0,
1835
ctypes.byref(crtverify)))
2501
gnutls.openpgp_crt_verify_self(crt, 0,
2502
ctypes.byref(crtverify))
1836
2503
if crtverify.value != 0:
1837
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1838
raise (gnutls.errors.CertificateSecurityError
2504
gnutls.openpgp_crt_deinit(crt)
2505
raise gnutls.CertificateSecurityError(code
1840
2507
# New buffer for the fingerprint
1841
2508
buf = ctypes.create_string_buffer(20)
1842
2509
buf_len = ctypes.c_size_t()
1843
2510
# 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)))
2511
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2512
ctypes.byref(buf_len))
1847
2513
# Deinit the certificate
1848
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2514
gnutls.openpgp_crt_deinit(crt)
1849
2515
# Convert the buffer to a Python bytestring
1850
2516
fpr = ctypes.string_at(buf, buf_len.value)
1851
2517
# Convert the bytestring to hexadecimal notation
1934
2606
# socket_wrapper(), if socketfd was set.
1935
2607
socketserver.TCPServer.__init__(self, server_address,
1936
2608
RequestHandlerClass)
1938
2610
def server_bind(self):
1939
2611
"""This overrides the normal server_bind() function
1940
2612
to bind to an interface if one was specified, and also NOT to
1941
2613
bind to an address or port if they were not specified."""
2614
global SO_BINDTODEVICE
1942
2615
if self.interface is not None:
1943
2616
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",
2617
# Fall back to a hard-coded value which seems to be
2619
logger.warning("SO_BINDTODEVICE not found, trying 25")
2620
SO_BINDTODEVICE = 25
2622
self.socket.setsockopt(
2623
socket.SOL_SOCKET, SO_BINDTODEVICE,
2624
(self.interface + "\0").encode("utf-8"))
2625
except socket.error as error:
2626
if error.errno == errno.EPERM:
2627
logger.error("No permission to bind to"
2628
" interface %s", self.interface)
2629
elif error.errno == errno.ENOPROTOOPT:
2630
logger.error("SO_BINDTODEVICE not available;"
2631
" cannot bind to interface %s",
2633
elif error.errno == errno.ENODEV:
2634
logger.error("Interface %s does not exist,"
2635
" cannot bind", self.interface)
1968
2638
# Only bind(2) the socket if we really need to.
1969
2639
if self.server_address[0] or self.server_address[1]:
2640
if self.server_address[1]:
2641
self.allow_reuse_address = True
1970
2642
if not self.server_address[0]:
1971
2643
if self.address_family == socket.AF_INET6:
1972
any_address = "::" # in6addr_any
2644
any_address = "::" # in6addr_any
1974
any_address = socket.INADDR_ANY
2646
any_address = "0.0.0.0" # INADDR_ANY
1975
2647
self.server_address = (any_address,
1976
2648
self.server_address[1])
1977
2649
elif not self.server_address[1]:
1978
self.server_address = (self.server_address[0],
2650
self.server_address = (self.server_address[0], 0)
1980
2651
# if self.interface:
1981
2652
# self.server_address = (self.server_address[0],
2007
2683
self.gnutls_priority = gnutls_priority
2008
2684
IPv6_TCPServer.__init__(self, server_address,
2009
2685
RequestHandlerClass,
2010
interface = interface,
2011
use_ipv6 = use_ipv6,
2012
socketfd = socketfd)
2686
interface=interface,
2013
2690
def server_activate(self):
2014
2691
if self.enabled:
2015
2692
return socketserver.TCPServer.server_activate(self)
2017
2694
def enable(self):
2018
2695
self.enabled = True
2020
2697
def add_pipe(self, parent_pipe, proc):
2021
2698
# 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):
2700
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2701
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2702
functools.partial(self.handle_ipc,
2703
parent_pipe=parent_pipe,
2706
def handle_ipc(self, source, condition,
2709
client_object=None):
2031
2710
# error, or the other end of multiprocessing.Pipe has closed
2032
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2711
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2033
2712
# Wait for other process to exit
2037
2716
# Read a request from the child
2038
2717
request = parent_pipe.recv()
2039
2718
command = request[0]
2041
2720
if command == 'init':
2043
address = request[2]
2045
for c in self.clients.itervalues():
2046
if c.fingerprint == fpr:
2721
key_id = request[1].decode("ascii")
2722
fpr = request[2].decode("ascii")
2723
address = request[3]
2725
for c in self.clients.values():
2726
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2728
if key_id and c.key_id == key_id:
2731
if fpr and c.fingerprint == fpr:
2050
logger.info("Client not found for fingerprint: %s, ad"
2051
"dress: %s", fpr, address)
2735
logger.info("Client not found for key ID: %s, address"
2736
": %s", key_id or fpr, address)
2052
2737
if self.use_dbus:
2053
2738
# Emit D-Bus signal
2054
mandos_dbus_service.ClientNotFound(fpr,
2739
mandos_dbus_service.ClientNotFound(key_id or fpr,
2056
2741
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,
2745
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2746
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2747
functools.partial(self.handle_ipc,
2748
parent_pipe=parent_pipe,
2750
client_object=client))
2067
2751
parent_pipe.send(True)
2068
2752
# remove the old hook in favor of the new above hook on
2072
2756
funcname = request[1]
2073
2757
args = request[2]
2074
2758
kwargs = request[3]
2076
2760
parent_pipe.send(('data', getattr(client_object,
2077
2761
funcname)(*args,
2080
2764
if command == 'getattr':
2081
2765
attrname = request[1]
2082
if callable(client_object.__getattribute__(attrname)):
2083
parent_pipe.send(('function',))
2766
if isinstance(client_object.__getattribute__(attrname),
2767
collections.abc.Callable):
2768
parent_pipe.send(('function', ))
2085
parent_pipe.send(('data', client_object
2086
.__getattribute__(attrname)))
2771
'data', client_object.__getattribute__(attrname)))
2088
2773
if command == 'setattr':
2089
2774
attrname = request[1]
2090
2775
value = request[2]
2091
2776
setattr(client_object, attrname, value)
2781
def rfc3339_duration_to_delta(duration):
2782
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2784
>>> rfc3339_duration_to_delta("P7D") == datetime.timedelta(7)
2786
>>> rfc3339_duration_to_delta("PT60S") == datetime.timedelta(0, 60)
2788
>>> rfc3339_duration_to_delta("PT60M") == datetime.timedelta(0, 3600)
2790
>>> rfc3339_duration_to_delta("PT24H") == datetime.timedelta(1)
2792
>>> rfc3339_duration_to_delta("P1W") == datetime.timedelta(7)
2794
>>> rfc3339_duration_to_delta("PT5M30S") == datetime.timedelta(0, 330)
2796
>>> rfc3339_duration_to_delta("P1DT3M20S") == datetime.timedelta(1, 200)
2800
# Parsing an RFC 3339 duration with regular expressions is not
2801
# possible - there would have to be multiple places for the same
2802
# values, like seconds. The current code, while more esoteric, is
2803
# cleaner without depending on a parsing library. If Python had a
2804
# built-in library for parsing we would use it, but we'd like to
2805
# avoid excessive use of external libraries.
2807
# New type for defining tokens, syntax, and semantics all-in-one
2808
Token = collections.namedtuple("Token", (
2809
"regexp", # To match token; if "value" is not None, must have
2810
# a "group" containing digits
2811
"value", # datetime.timedelta or None
2812
"followers")) # Tokens valid after this token
2813
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2814
# the "duration" ABNF definition in RFC 3339, Appendix A.
2815
token_end = Token(re.compile(r"$"), None, frozenset())
2816
token_second = Token(re.compile(r"(\d+)S"),
2817
datetime.timedelta(seconds=1),
2818
frozenset((token_end, )))
2819
token_minute = Token(re.compile(r"(\d+)M"),
2820
datetime.timedelta(minutes=1),
2821
frozenset((token_second, token_end)))
2822
token_hour = Token(re.compile(r"(\d+)H"),
2823
datetime.timedelta(hours=1),
2824
frozenset((token_minute, token_end)))
2825
token_time = Token(re.compile(r"T"),
2827
frozenset((token_hour, token_minute,
2829
token_day = Token(re.compile(r"(\d+)D"),
2830
datetime.timedelta(days=1),
2831
frozenset((token_time, token_end)))
2832
token_month = Token(re.compile(r"(\d+)M"),
2833
datetime.timedelta(weeks=4),
2834
frozenset((token_day, token_end)))
2835
token_year = Token(re.compile(r"(\d+)Y"),
2836
datetime.timedelta(weeks=52),
2837
frozenset((token_month, token_end)))
2838
token_week = Token(re.compile(r"(\d+)W"),
2839
datetime.timedelta(weeks=1),
2840
frozenset((token_end, )))
2841
token_duration = Token(re.compile(r"P"), None,
2842
frozenset((token_year, token_month,
2843
token_day, token_time,
2845
# Define starting values:
2847
value = datetime.timedelta()
2849
# Following valid tokens
2850
followers = frozenset((token_duration, ))
2851
# String left to parse
2853
# Loop until end token is found
2854
while found_token is not token_end:
2855
# Search for any currently valid tokens
2856
for token in followers:
2857
match = token.regexp.match(s)
2858
if match is not None:
2860
if token.value is not None:
2861
# Value found, parse digits
2862
factor = int(match.group(1), 10)
2863
# Add to value so far
2864
value += factor * token.value
2865
# Strip token from string
2866
s = token.regexp.sub("", s, 1)
2869
# Set valid next tokens
2870
followers = found_token.followers
2873
# No currently valid tokens were found
2874
raise ValueError("Invalid RFC 3339 duration: {!r}"
2096
2880
def string_to_delta(interval):
2097
2881
"""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)
2883
>>> string_to_delta('7d') == datetime.timedelta(7)
2885
>>> string_to_delta('60s') == datetime.timedelta(0, 60)
2887
>>> string_to_delta('60m') == datetime.timedelta(0, 3600)
2889
>>> string_to_delta('24h') == datetime.timedelta(1)
2891
>>> string_to_delta('1w') == datetime.timedelta(7)
2893
>>> string_to_delta('5m 30s') == datetime.timedelta(0, 330)
2898
return rfc3339_duration_to_delta(interval)
2112
2902
timevalue = datetime.timedelta(0)
2113
2903
for s in interval.split():
2115
suffix = unicode(s[-1])
2116
2906
value = int(s[:-1])
2117
2907
if suffix == "d":
2118
2908
delta = datetime.timedelta(value)
2191
2980
parser.add_argument("--no-dbus", action="store_false",
2192
2981
dest="use_dbus", help="Do not provide D-Bus"
2193
" system bus interface")
2982
" system bus interface", default=None)
2194
2983
parser.add_argument("--no-ipv6", action="store_false",
2195
dest="use_ipv6", help="Do not use IPv6")
2984
dest="use_ipv6", help="Do not use IPv6",
2196
2986
parser.add_argument("--no-restore", action="store_false",
2197
2987
dest="restore", help="Do not restore stored"
2988
" state", default=None)
2199
2989
parser.add_argument("--socket", type=int,
2200
2990
help="Specify a file descriptor to a network"
2201
2991
" socket to use instead of creating one")
2202
2992
parser.add_argument("--statedir", metavar="DIR",
2203
2993
help="Directory to save/restore state in")
2994
parser.add_argument("--foreground", action="store_true",
2995
help="Run in foreground", default=None)
2996
parser.add_argument("--no-zeroconf", action="store_false",
2997
dest="zeroconf", help="Do not use Zeroconf",
2205
3000
options = parser.parse_args()
2212
3002
# 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"
3003
if gnutls.has_rawpk:
3004
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
3005
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
3007
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
3008
":+SIGN-DSA-SHA256")
3009
server_defaults = {"interface": "",
3013
"priority": priority,
3014
"servicename": "Mandos",
3020
"statedir": "/var/lib/mandos",
3021
"foreground": "False",
2228
3026
# Parse config file for server-global settings
2229
server_config = configparser.SafeConfigParser(server_defaults)
3027
server_config = configparser.ConfigParser(server_defaults)
2230
3028
del server_defaults
2231
server_config.read(os.path.join(options.configdir,
2233
# Convert the SafeConfigParser object to a dict
3029
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3030
# Convert the ConfigParser object to a dict
2234
3031
server_settings = server_config.defaults()
2235
3032
# Use the appropriate methods on the non-string config options
2236
for option in ("debug", "use_dbus", "use_ipv6"):
3033
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3034
"foreground", "zeroconf"):
2237
3035
server_settings[option] = server_config.getboolean("DEFAULT",
2239
3037
if server_settings["port"]:
2242
3040
if server_settings["socket"]:
2243
3041
server_settings["socket"] = server_config.getint("DEFAULT",
2245
# Later, stdin will, and stdout, and stderr might, be dup'ed
3043
# Later, stdin will, and stdout and stderr might, be dup'ed
2246
3044
# over with an opened os.devnull. But we don't want this to
2247
3045
# happen with a supplied network socket.
2248
3046
if 0 <= server_settings["socket"] <= 2:
2249
3047
server_settings["socket"] = os.dup(server_settings
2251
3049
del server_config
2253
3051
# Override the settings from the config file with command line
2254
3052
# options, if set.
2255
3053
for option in ("interface", "address", "port", "debug",
2256
"priority", "servicename", "configdir",
2257
"use_dbus", "use_ipv6", "debuglevel", "restore",
2258
"statedir", "socket"):
3054
"priority", "servicename", "configdir", "use_dbus",
3055
"use_ipv6", "debuglevel", "restore", "statedir",
3056
"socket", "foreground", "zeroconf"):
2259
3057
value = getattr(options, option)
2260
3058
if value is not None:
2261
3059
server_settings[option] = value
2263
3061
# Force all strings to be unicode
2264
3062
for option in server_settings.keys():
2265
if type(server_settings[option]) is str:
2266
server_settings[option] = unicode(server_settings[option])
3063
if isinstance(server_settings[option], bytes):
3064
server_settings[option] = (server_settings[option]
3066
# Force all boolean options to be boolean
3067
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3068
"foreground", "zeroconf"):
3069
server_settings[option] = bool(server_settings[option])
3070
# Debug implies foreground
3071
if server_settings["debug"]:
3072
server_settings["foreground"] = True
2267
3073
# Now we have our good server settings in "server_settings"
2269
3075
##################################################################
3077
if (not server_settings["zeroconf"]
3078
and not (server_settings["port"]
3079
or server_settings["socket"] != "")):
3080
parser.error("Needs port or socket to work without Zeroconf")
2271
3082
# For convenience
2272
3083
debug = server_settings["debug"]
2273
3084
debuglevel = server_settings["debuglevel"]
3153
logger.debug("Did setuid/setgid to {}:{}".format(uid,
2336
3155
except OSError as error:
3156
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3157
.format(uid, gid, os.strerror(error.errno)))
2337
3158
if error.errno != errno.EPERM:
2341
3162
# Enable all possible GnuTLS debugging
2343
3164
# "Use a log level over 10 to enable all debugging options."
2344
3165
# - GnuTLS manual
2345
gnutls.library.functions.gnutls_global_set_log_level(11)
2347
@gnutls.library.types.gnutls_log_func
3166
gnutls.global_set_log_level(11)
2348
3169
def debug_gnutls(level, string):
2349
3170
logger.debug("GnuTLS: %s", string[:-1])
2351
(gnutls.library.functions
2352
.gnutls_global_set_log_function(debug_gnutls))
3172
gnutls.global_set_log_function(debug_gnutls)
2354
3174
# Redirect stdin so all checkers get /dev/null
2355
3175
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2356
3176
os.dup2(null, sys.stdin.fileno())
2360
3180
# Need to fork before connecting to D-Bus
2362
3182
# Close all input and output, do double fork, etc.
2365
gobject.threads_init()
3185
if gi.version_info < (3, 10, 2):
3186
# multiprocessing will use threads, so before we use GLib we
3187
# need to inform GLib that threads will be used.
2367
3190
global main_loop
2368
3191
# From the Avahi example code
2369
3192
DBusGMainLoop(set_as_default=True)
2370
main_loop = gobject.MainLoop()
3193
main_loop = GLib.MainLoop()
2371
3194
bus = dbus.SystemBus()
2372
3195
# End of Avahi example code
2375
3198
bus_name = dbus.service.BusName("se.recompile.Mandos",
2376
bus, do_not_queue=True)
2377
old_bus_name = (dbus.service.BusName
2378
("se.bsnet.fukt.Mandos", bus,
2380
except dbus.exceptions.NameExistsException as e:
3201
old_bus_name = dbus.service.BusName(
3202
"se.bsnet.fukt.Mandos", bus,
3204
except dbus.exceptions.DBusException as e:
2381
3205
logger.error("Disabling D-Bus:", exc_info=e)
2382
3206
use_dbus = False
2383
3207
server_settings["use_dbus"] = False
2384
3208
tcp_server.use_dbus = False
2385
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2386
service = AvahiServiceToSyslog(name =
2387
server_settings["servicename"],
2388
servicetype = "_mandos._tcp",
2389
protocol = protocol, bus = bus)
2390
if server_settings["interface"]:
2391
service.interface = (if_nametoindex
2392
(str(server_settings["interface"])))
3210
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3211
service = AvahiServiceToSyslog(
3212
name=server_settings["servicename"],
3213
servicetype="_mandos._tcp",
3216
if server_settings["interface"]:
3217
service.interface = if_nametoindex(
3218
server_settings["interface"].encode("utf-8"))
2394
3220
global multiprocessing_manager
2395
3221
multiprocessing_manager = multiprocessing.Manager()
2397
3223
client_class = Client
2399
client_class = functools.partial(ClientDBus, bus = bus)
3225
client_class = functools.partial(ClientDBus, bus=bus)
2401
3227
client_settings = Client.config_parser(client_config)
2402
3228
old_client_settings = {}
2403
3229
clients_data = {}
3231
# This is used to redirect stdout and stderr for checker processes
3233
wnull = open(os.devnull, "w") # A writable /dev/null
3234
# Only used if server is running in foreground but not in debug
3236
if debug or not foreground:
2405
3239
# Get client data and settings from last running state.
2406
3240
if server_settings["restore"]:
2408
3242
with open(stored_state_path, "rb") as stored_state:
2409
clients_data, old_client_settings = (pickle.load
3243
if sys.version_info.major == 2:
3244
clients_data, old_client_settings = pickle.load(
3247
bytes_clients_data, bytes_old_client_settings = (
3248
pickle.load(stored_state, encoding="bytes"))
3249
# Fix bytes to strings
3252
clients_data = {(key.decode("utf-8")
3253
if isinstance(key, bytes)
3256
bytes_clients_data.items()}
3257
del bytes_clients_data
3258
for key in clients_data:
3259
value = {(k.decode("utf-8")
3260
if isinstance(k, bytes) else k): v
3262
clients_data[key].items()}
3263
clients_data[key] = value
3265
value["client_structure"] = [
3267
if isinstance(s, bytes)
3269
value["client_structure"]]
3270
# .name, .host, and .checker_command
3271
for k in ("name", "host", "checker_command"):
3272
if isinstance(value[k], bytes):
3273
value[k] = value[k].decode("utf-8")
3274
if "key_id" not in value:
3275
value["key_id"] = ""
3276
elif "fingerprint" not in value:
3277
value["fingerprint"] = ""
3278
# old_client_settings
3280
old_client_settings = {
3281
(key.decode("utf-8")
3282
if isinstance(key, bytes)
3285
bytes_old_client_settings.items()}
3286
del bytes_old_client_settings
3287
# .host and .checker_command
3288
for value in old_client_settings.values():
3289
for attribute in ("host", "checker_command"):
3290
if isinstance(value[attribute], bytes):
3291
value[attribute] = (value[attribute]
2411
3293
os.remove(stored_state_path)
2412
3294
except IOError as e:
2413
3295
if e.errno == errno.ENOENT:
2414
logger.warning("Could not load persistent state: {0}"
2415
.format(os.strerror(e.errno)))
3296
logger.warning("Could not load persistent state:"
3297
" {}".format(os.strerror(e.errno)))
2417
3299
logger.critical("Could not load persistent state:",
2420
3302
except EOFError as e:
2421
3303
logger.warning("Could not load persistent state: "
2422
"EOFError:", exc_info=e)
2424
3307
with PGPEngine() as pgp:
2425
for client_name, client in clients_data.iteritems():
3308
for client_name, client in clients_data.items():
3309
# Skip removed clients
3310
if client_name not in client_settings:
2426
3313
# Decide which value to use after restoring saved state.
2427
3314
# We have three different values: Old config file,
2428
3315
# new config file, and saved state.
2486
3373
for client_name in (set(client_settings)
2487
3374
- set(old_client_settings)):
2488
3375
clients_data[client_name] = client_settings[client_name]
2490
3377
# Create all client objects
2491
for client_name, client in clients_data.iteritems():
3378
for client_name, client in clients_data.items():
2492
3379
tcp_server.clients[client_name] = client_class(
2493
name = client_name, settings = client)
3382
server_settings=server_settings)
2495
3384
if not tcp_server.clients:
2496
3385
logger.warning("No clients defined")
2502
pidfile.write(str(pid) + "\n".encode("utf-8"))
2505
logger.error("Could not write to file %r with PID %d",
2508
# "pidfile" was never created
3388
if pidfile is not None:
3392
print(pid, file=pidfile)
3394
logger.error("Could not write to file %r with PID %d",
2510
3397
del pidfilename
2512
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2513
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3399
for termsig in (signal.SIGHUP, signal.SIGTERM):
3400
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3401
lambda: main_loop.quit() and False)
2516
@alternate_dbus_interfaces({"se.recompile.Mandos":
2517
"se.bsnet.fukt.Mandos"})
2518
class MandosDBusService(DBusObjectWithProperties):
3405
@alternate_dbus_interfaces(
3406
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3407
class MandosDBusService(DBusObjectWithObjectManager):
2519
3408
"""A D-Bus proxy object"""
2520
3410
def __init__(self):
2521
3411
dbus.service.Object.__init__(self, bus, "/")
2522
3413
_interface = "se.recompile.Mandos"
2524
@dbus_interface_annotations(_interface)
2526
return { "org.freedesktop.DBus.Property"
2527
".EmitsChangedSignal":
2530
3415
@dbus.service.signal(_interface, signature="o")
2531
3416
def ClientAdded(self, objpath):
2535
3420
@dbus.service.signal(_interface, signature="ss")
2536
def ClientNotFound(self, fingerprint, address):
3421
def ClientNotFound(self, key_id, address):
3425
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2540
3427
@dbus.service.signal(_interface, signature="os")
2541
3428
def ClientRemoved(self, objpath, name):
3432
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2545
3434
@dbus.service.method(_interface, out_signature="ao")
2546
3435
def GetAllClients(self):
2548
return dbus.Array(c.dbus_object_path
2550
tcp_server.clients.itervalues())
3437
return dbus.Array(c.dbus_object_path for c in
3438
tcp_server.clients.values())
3440
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2552
3442
@dbus.service.method(_interface,
2553
3443
out_signature="a{oa{sv}}")
2554
3444
def GetAllClientsWithProperties(self):
2556
3446
return dbus.Dictionary(
2557
((c.dbus_object_path, c.GetAll(""))
2558
for c in tcp_server.clients.itervalues()),
3447
{c.dbus_object_path: c.GetAll(
3448
"se.recompile.Mandos.Client")
3449
for c in tcp_server.clients.values()},
2559
3450
signature="oa{sv}")
2561
3452
@dbus.service.method(_interface, in_signature="o")
2562
3453
def RemoveClient(self, object_path):
2564
for c in tcp_server.clients.itervalues():
3455
for c in tcp_server.clients.values():
2565
3456
if c.dbus_object_path == object_path:
2566
3457
del tcp_server.clients[c.name]
2567
3458
c.remove_from_connection()
2568
# Don't signal anything except ClientRemoved
3459
# Don't signal the disabling
2569
3460
c.disable(quiet=True)
2571
self.ClientRemoved(object_path, c.name)
3461
# Emit D-Bus signal for removal
3462
self.client_removed_signal(c)
2573
3464
raise KeyError(object_path)
3468
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3469
out_signature="a{oa{sa{sv}}}")
3470
def GetManagedObjects(self):
3472
return dbus.Dictionary(
3473
{client.dbus_object_path:
3475
{interface: client.GetAll(interface)
3477
client._get_all_interface_names()})
3478
for client in tcp_server.clients.values()})
3480
def client_added_signal(self, client):
3481
"""Send the new standard signal and the old signal"""
3483
# New standard signal
3484
self.InterfacesAdded(
3485
client.dbus_object_path,
3487
{interface: client.GetAll(interface)
3489
client._get_all_interface_names()}))
3491
self.ClientAdded(client.dbus_object_path)
3493
def client_removed_signal(self, client):
3494
"""Send the new standard signal and the old signal"""
3496
# New standard signal
3497
self.InterfacesRemoved(
3498
client.dbus_object_path,
3499
client._get_all_interface_names())
3501
self.ClientRemoved(client.dbus_object_path,
2577
3504
mandos_dbus_service = MandosDBusService()
3506
# Save modules to variables to exempt the modules from being
3507
# unloaded before the function registered with atexit() is run.
3508
mp = multiprocessing
2580
3512
"Cleanup function; run on exit"
2583
multiprocessing.active_children()
3516
mp.active_children()
2584
3518
if not (tcp_server.clients or client_settings):
2587
3521
# Store client before exiting. Secrets are encrypted with key
2588
3522
# based on what config file has. If config file is
2589
3523
# removed/edited, old secret will thus be unrecovable.
2591
3525
with PGPEngine() as pgp:
2592
for client in tcp_server.clients.itervalues():
3526
for client in tcp_server.clients.values():
2593
3527
key = client_settings[client.name]["secret"]
2594
3528
client.encrypted_secret = pgp.encrypt(client.secret,
2596
3530
client_dict = {}
2598
3532
# A list of attributes that can not be pickled
2600
exclude = set(("bus", "changedstate", "secret",
2602
for name, typ in (inspect.getmembers
2603
(dbus.service.Object)):
3534
exclude = {"bus", "changedstate", "secret",
3535
"checker", "server_settings"}
3536
for name, typ in inspect.getmembers(dbus.service
2604
3538
exclude.add(name)
2606
3540
client_dict["encrypted_secret"] = (client
2607
3541
.encrypted_secret)
2608
3542
for attr in client.client_structure:
2609
3543
if attr not in exclude:
2610
3544
client_dict[attr] = getattr(client, attr)
2612
3546
clients[client.name] = client_dict
2613
3547
del client_settings[client.name]["secret"]
2616
with (tempfile.NamedTemporaryFile
2617
(mode='wb', suffix=".pickle", prefix='clients-',
2618
dir=os.path.dirname(stored_state_path),
2619
delete=False)) as stored_state:
2620
pickle.dump((clients, client_settings), stored_state)
2621
tempname=stored_state.name
3550
with tempfile.NamedTemporaryFile(
3554
dir=os.path.dirname(stored_state_path),
3555
delete=False) as stored_state:
3556
pickle.dump((clients, client_settings), stored_state,
3558
tempname = stored_state.name
2622
3559
os.rename(tempname, stored_state_path)
2623
3560
except (IOError, OSError) as e: