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# "AvahiService" class, and some lines in "main".
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# Everything else is
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# Copyright © 2008-2013 Teddy Hogeborn
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# Copyright © 2008-2013 Björn Påhlsson
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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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class PGPEngine(object):
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"""A simple class for OpenPGP symmetric encryption & decryption"""
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def __init__(self):
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self.gnupg = GnuPGInterface.GnuPG()
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self.tempdir = tempfile.mkdtemp(prefix="mandos-")
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self.gnupgargs = ['--batch',
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'--home', self.tempdir,
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self.gnupg = GnuPGInterface.GnuPG()
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self.gnupg.options.meta_interactive = False
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self.gnupg.options.homedir = self.tempdir
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self.gnupg.options.extra_args.extend(['--force-mdc',
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def __enter__(self):
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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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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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return b"mandos" + binascii.hexlify(password)
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def encrypt(self, data, password):
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passphrase = self.password_encode(password)
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with tempfile.NamedTemporaryFile(dir=self.tempdir
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passfile.write(passphrase)
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proc = subprocess.Popen(['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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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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return ciphertext
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def decrypt(self, data, password):
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passphrase = self.password_encode(password)
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with tempfile.NamedTemporaryFile(dir = self.tempdir
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passfile.write(passphrase)
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proc = subprocess.Popen(['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
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if proc.returncode != 0:
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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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return decrypted_plaintext
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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 <https://www.iana.org/assignments/service-names-port-numbers>
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See <http://www.dns-sd.org/ServiceTypes.html>
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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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def __init__(self, settings, name = None, server_settings=None):
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def __init__(self, settings, name = None):
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if server_settings is None:
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self.server_settings = server_settings
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# adding all client settings
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for setting, value in settings.iteritems():
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setattr(self, setting, value)
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# in normal mode, that is already done by daemon(),
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# and in debug mode we don't want to. (Stdin is
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# always replaced by /dev/null.)
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# The exception is when not debugging but nevertheless
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# running in the foreground; use the previously
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if (not self.server_settings["debug"]
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and self.server_settings["foreground"]):
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popen_args.update({"stdout": wnull,
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self.checker = subprocess.Popen(command,
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except OSError as error:
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logger.error("Failed to start subprocess",
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self.checker_callback_tag = (gobject.child_watch_add
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(self.checker.pid,
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self.checker_callback,
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# The checker may have completed before the gobject
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# watch was added. Check for this.
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pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
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except OSError as error:
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if error.errno == errno.ECHILD:
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# This should never happen
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logger.error("Child process vanished",
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pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
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gobject.source_remove(self.checker_callback_tag)
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self.checker_callback(pid, status, command)
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interface_names.add(alt_interface)
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# Is this a D-Bus signal?
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if getattr(attribute, "_dbus_is_signal", False):
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# Extract the original non-method undecorated
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# function by black magic
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# Extract the original non-method function by
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nonmethod_func = (dict(
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zip(attribute.func_code.co_freevars,
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attribute.__closure__))["func"]
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help="Run self-test")
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parser.add_argument("--debug", action="store_true",
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help="Debug mode; run in foreground and log"
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" to terminal", default=None)
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parser.add_argument("--debuglevel", metavar="LEVEL",
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help="Debug level for stdout output")
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parser.add_argument("--priority", help="GnuTLS"
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parser.add_argument("--no-dbus", action="store_false",
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dest="use_dbus", help="Do not provide D-Bus"
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" system bus interface", default=None)
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" system bus interface")
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parser.add_argument("--no-ipv6", action="store_false",
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dest="use_ipv6", help="Do not use IPv6",
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dest="use_ipv6", help="Do not use IPv6")
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parser.add_argument("--no-restore", action="store_false",
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dest="restore", help="Do not restore stored"
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" state", default=None)
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parser.add_argument("--socket", type=int,
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help="Specify a file descriptor to a network"
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" socket to use instead of creating one")
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parser.add_argument("--statedir", metavar="DIR",
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help="Directory to save/restore state in")
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parser.add_argument("--foreground", action="store_true",
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help="Run in foreground", default=None)
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help="Run in foreground")
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options = parser.parse_args()
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for option in server_settings.keys():
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if type(server_settings[option]) is str:
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server_settings[option] = unicode(server_settings[option])
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# Force all boolean options to be boolean
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for option in ("debug", "use_dbus", "use_ipv6", "restore",
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server_settings[option] = bool(server_settings[option])
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# Debug implies foreground
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if server_settings["debug"]:
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server_settings["foreground"] = True
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# Create all client objects
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for client_name, client in clients_data.iteritems():
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tcp_server.clients[client_name] = client_class(
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name = client_name, settings = client,
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server_settings = server_settings)
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name = client_name, settings = client)
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if not tcp_server.clients:
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logger.warning("No clients defined")