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# -*- mode: python; coding: utf-8 -*-
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# -*- mode: python; after-save-hook: (lambda () (let ((command (if (fboundp 'file-local-name) (file-local-name (buffer-file-name)) (or (file-remote-p (buffer-file-name) 'localname) (buffer-file-name))))) (if (= (progn (if (get-buffer "*Test*") (kill-buffer "*Test*")) (process-file-shell-command (format "%s --check" (shell-quote-argument command)) nil "*Test*")) 0) (let ((w (get-buffer-window "*Test*"))) (if w (delete-window w))) (progn (with-current-buffer "*Test*" (compilation-mode)) (display-buffer "*Test*" '(display-buffer-in-side-window)))))); coding: utf-8 -*-
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# Mandos server - give out binary blobs to connecting clients.
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# This program is partly derived from an example program for an Avahi
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# service publisher, downloaded from
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# <http://avahi.org/wiki/PythonPublishExample>. This includes the
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# methods "add", "remove", "server_state_changed",
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# "entry_group_state_changed", "cleanup", and "activate" in the
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# "AvahiService" class, and some lines in "main".
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# Everything else is
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# Copyright © 2008-2016 Teddy Hogeborn
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# Copyright © 2008-2016 Björn Påhlsson
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# Copyright © 2008-2019 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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import xml.dom.minidom
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if sys.version_info.major == 2:
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# Show warnings by default
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if not sys.warnoptions:
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warnings.simplefilter("default")
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# Try to find the value of SO_BINDTODEVICE:
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# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
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# newer, and it is also the most natural place for it:
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SO_BINDTODEVICE = socket.SO_BINDTODEVICE
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except AttributeError:
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# This is where SO_BINDTODEVICE was up to and including Python
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from IN import SO_BINDTODEVICE
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except ImportError:
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SO_BINDTODEVICE = None
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if sys.version_info.major == 2:
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# In Python 2.7 it seems to have been removed entirely.
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# Try running the C preprocessor:
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cc = subprocess.Popen(["cc", "--language=c", "-E",
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE)
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stdout = cc.communicate(
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"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
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SO_BINDTODEVICE = int(stdout.splitlines()[-1])
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except (OSError, ValueError, IndexError):
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SO_BINDTODEVICE = None
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if sys.version_info < (3, 2):
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configparser.Configparser = configparser.SafeConfigParser
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stored_state_file = "clients.pickle"
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logger = logging.getLogger()
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logging.captureWarnings(True) # Show warnings via the logging system
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if_nametoindex = ctypes.cdll.LoadLibrary(
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ctypes.util.find_library("c")).if_nametoindex
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except (OSError, AttributeError):
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def if_nametoindex(interface):
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"Get an interface index the hard way, i.e. using fcntl()"
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SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
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'--passphrase-file',
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+ self.gnupgargs,
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stdin = subprocess.PIPE,
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stdout = subprocess.PIPE,
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stderr = subprocess.PIPE)
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ciphertext, err = proc.communicate(input = data)
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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ciphertext, err = proc.communicate(input=data)
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if proc.returncode != 0:
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raise PGPError(err)
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return ciphertext
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def decrypt(self, data, password):
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passphrase = self.password_encode(password)
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with tempfile.NamedTemporaryFile(
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dir = self.tempdir) as passfile:
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dir=self.tempdir) as passfile:
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passfile.write(passphrase)
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proc = subprocess.Popen([self.gpg, '--decrypt',
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'--passphrase-file',
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+ self.gnupgargs,
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stdin = subprocess.PIPE,
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stdout = subprocess.PIPE,
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stderr = subprocess.PIPE)
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decrypted_plaintext, err = proc.communicate(input = data)
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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decrypted_plaintext, err = proc.communicate(input=data)
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if proc.returncode != 0:
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raise PGPError(err)
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return decrypted_plaintext
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# Pretend that we have an Avahi module
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"""This isn't so much a class as it is a module-like namespace.
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It is instantiated once, and simulates having an Avahi module."""
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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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"""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(self, t):
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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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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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class AvahiServiceToSyslog(AvahiService):
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def rename(self, *args, **kwargs):
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"""Add the new name to the syslog messages"""
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ret = AvahiService.rename(self, *args, **kwargs)
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ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
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syslogger.setFormatter(logging.Formatter(
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'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
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.format(self.name)))
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# Pretend that we have a GnuTLS module
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class GnuTLS(object):
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"""This isn't so much a class as it is a module-like namespace.
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It is instantiated once, and simulates having a GnuTLS module."""
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_library = ctypes.cdll.LoadLibrary(
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ctypes.util.find_library("gnutls"))
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_need_version = b"3.3.0"
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# Need to use class name "GnuTLS" here, since this method is
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# called before the assignment to the "gnutls" global variable
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if GnuTLS.check_version(self._need_version) is None:
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raise GnuTLS.Error("Needs GnuTLS {} or later"
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.format(self._need_version))
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"""This isn't so much a class as it is a module-like namespace."""
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library = ctypes.util.find_library("gnutls")
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library = ctypes.util.find_library("gnutls-deb0")
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_library = ctypes.cdll.LoadLibrary(library)
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# Unless otherwise indicated, the constants and types below are
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# all from the gnutls/gnutls.h C header file.
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E_INTERRUPTED = -52
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CRD_CERTIFICATE = 1
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E_NO_CERTIFICATE_FOUND = -49
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KEYID_USE_SHA256 = 1 # gnutls/x509.h
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OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
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class session_int(ctypes.Structure):
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session_t = ctypes.POINTER(session_int)
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class certificate_credentials_st(ctypes.Structure):
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certificate_credentials_t = ctypes.POINTER(
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certificate_credentials_st)
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certificate_type_t = ctypes.c_int
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class datum_t(ctypes.Structure):
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_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
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('size', ctypes.c_uint)]
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class openpgp_crt_int(ctypes.Structure):
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openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
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openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
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openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
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log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
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credentials_type_t = ctypes.c_int
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transport_ptr_t = ctypes.c_void_p
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close_request_t = ctypes.c_int
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class Error(Exception):
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# We need to use the class name "GnuTLS" here, since this
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# exception might be raised from within GnuTLS.__init__,
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# which is called before the assignment to the "gnutls"
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# global variable has happened.
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def __init__(self, message = None, code = None, args=()):
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def __init__(self, message=None, code=None, args=()):
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# Default usage is by a message string, but if a return
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# code is passed, convert it to a string with
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# gnutls.strerror()
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if message is None and code is not None:
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message = GnuTLS.strerror(code)
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return super(GnuTLS.Error, self).__init__(
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message = gnutls.strerror(code)
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return super(gnutls.Error, self).__init__(
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class CertificateSecurityError(Error):
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class Credentials(object):
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def __init__(self):
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self._c_object = gnutls.certificate_credentials_t()
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gnutls.certificate_allocate_credentials(
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ctypes.byref(self._c_object))
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self.type = gnutls.CRD_CERTIFICATE
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def __del__(self):
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gnutls.certificate_free_credentials(self._c_object)
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class ClientSession(object):
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def __init__(self, socket, credentials = None):
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def __init__(self, socket, credentials=None):
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self._c_object = gnutls.session_t()
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gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
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gnutls_flags = gnutls.CLIENT
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if gnutls.check_version(b"3.5.6"):
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gnutls_flags |= gnutls.NO_TICKETS
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gnutls_flags |= gnutls.ENABLE_RAWPK
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gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
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gnutls.set_default_priority(self._c_object)
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gnutls.transport_set_ptr(self._c_object, socket.fileno())
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gnutls.handshake_set_private_extensions(self._c_object,
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return _error_code(result)
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result = func(*arguments)
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# Unless otherwise indicated, the function declarations below are
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# all from the gnutls/gnutls.h C header file.
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priority_set_direct = _library.gnutls_priority_set_direct
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priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
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ctypes.POINTER(ctypes.c_char_p)]
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priority_set_direct.restype = _error_code
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init = _library.gnutls_init
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init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
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init.restype = _error_code
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set_default_priority = _library.gnutls_set_default_priority
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set_default_priority.argtypes = [session_t]
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set_default_priority.restype = _error_code
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record_send = _library.gnutls_record_send
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record_send.argtypes = [session_t, ctypes.c_void_p,
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record_send.restype = ctypes.c_ssize_t
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record_send.errcheck = _retry_on_error
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certificate_allocate_credentials = (
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_library.gnutls_certificate_allocate_credentials)
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certificate_allocate_credentials.argtypes = [
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ctypes.POINTER(certificate_credentials_t)]
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certificate_allocate_credentials.restype = _error_code
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certificate_free_credentials = (
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_library.gnutls_certificate_free_credentials)
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certificate_free_credentials.argtypes = [certificate_credentials_t]
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certificate_free_credentials.argtypes = [
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certificate_credentials_t]
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certificate_free_credentials.restype = None
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handshake_set_private_extensions = (
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_library.gnutls_handshake_set_private_extensions)
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handshake_set_private_extensions.argtypes = [session_t,
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handshake_set_private_extensions.restype = None
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credentials_set = _library.gnutls_credentials_set
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credentials_set.argtypes = [session_t, credentials_type_t,
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credentials_set.restype = _error_code
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strerror = _library.gnutls_strerror
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strerror.argtypes = [ctypes.c_int]
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strerror.restype = ctypes.c_char_p
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certificate_type_get = _library.gnutls_certificate_type_get
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certificate_type_get.argtypes = [session_t]
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certificate_type_get.restype = _error_code
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certificate_get_peers = _library.gnutls_certificate_get_peers
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certificate_get_peers.argtypes = [session_t,
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ctypes.POINTER(ctypes.c_uint)]
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certificate_get_peers.restype = ctypes.POINTER(datum_t)
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global_set_log_level = _library.gnutls_global_set_log_level
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global_set_log_level.argtypes = [ctypes.c_int]
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global_set_log_level.restype = None
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global_set_log_function = _library.gnutls_global_set_log_function
680
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global_set_log_function.argtypes = [log_func]
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global_set_log_function.restype = None
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deinit = _library.gnutls_deinit
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deinit.argtypes = [session_t]
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deinit.restype = None
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handshake = _library.gnutls_handshake
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handshake.argtypes = [session_t]
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handshake.restype = _error_code
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handshake.errcheck = _retry_on_error
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731
transport_set_ptr = _library.gnutls_transport_set_ptr
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transport_set_ptr.argtypes = [session_t, transport_ptr_t]
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transport_set_ptr.restype = None
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bye = _library.gnutls_bye
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bye.argtypes = [session_t, close_request_t]
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bye.restype = _error_code
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738
bye.errcheck = _retry_on_error
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740
check_version = _library.gnutls_check_version
702
741
check_version.argtypes = [ctypes.c_char_p]
703
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check_version.restype = ctypes.c_char_p
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# All the function declarations below are from gnutls/openpgp.h
707
openpgp_crt_init = _library.gnutls_openpgp_crt_init
708
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
709
openpgp_crt_init.restype = _error_code
711
openpgp_crt_import = _library.gnutls_openpgp_crt_import
712
openpgp_crt_import.argtypes = [openpgp_crt_t,
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ctypes.POINTER(datum_t),
715
openpgp_crt_import.restype = _error_code
717
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
718
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
719
ctypes.POINTER(ctypes.c_uint)]
720
openpgp_crt_verify_self.restype = _error_code
722
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
723
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
724
openpgp_crt_deinit.restype = None
726
openpgp_crt_get_fingerprint = (
727
_library.gnutls_openpgp_crt_get_fingerprint)
728
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
732
openpgp_crt_get_fingerprint.restype = _error_code
744
_need_version = b"3.3.0"
745
if check_version(_need_version) is None:
746
raise self.Error("Needs GnuTLS {} or later"
747
.format(_need_version))
749
_tls_rawpk_version = b"3.6.6"
750
has_rawpk = bool(check_version(_tls_rawpk_version))
754
class pubkey_st(ctypes.Structure):
756
pubkey_t = ctypes.POINTER(pubkey_st)
758
x509_crt_fmt_t = ctypes.c_int
760
# All the function declarations below are from gnutls/abstract.h
761
pubkey_init = _library.gnutls_pubkey_init
762
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
763
pubkey_init.restype = _error_code
765
pubkey_import = _library.gnutls_pubkey_import
766
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
768
pubkey_import.restype = _error_code
770
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
771
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
772
ctypes.POINTER(ctypes.c_ubyte),
773
ctypes.POINTER(ctypes.c_size_t)]
774
pubkey_get_key_id.restype = _error_code
776
pubkey_deinit = _library.gnutls_pubkey_deinit
777
pubkey_deinit.argtypes = [pubkey_t]
778
pubkey_deinit.restype = None
780
# All the function declarations below are from gnutls/openpgp.h
782
openpgp_crt_init = _library.gnutls_openpgp_crt_init
783
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
784
openpgp_crt_init.restype = _error_code
786
openpgp_crt_import = _library.gnutls_openpgp_crt_import
787
openpgp_crt_import.argtypes = [openpgp_crt_t,
788
ctypes.POINTER(datum_t),
790
openpgp_crt_import.restype = _error_code
792
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
793
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
794
ctypes.POINTER(ctypes.c_uint)]
795
openpgp_crt_verify_self.restype = _error_code
797
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
798
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
799
openpgp_crt_deinit.restype = None
801
openpgp_crt_get_fingerprint = (
802
_library.gnutls_openpgp_crt_get_fingerprint)
803
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
807
openpgp_crt_get_fingerprint.restype = _error_code
809
if check_version(b"3.6.4"):
810
certificate_type_get2 = _library.gnutls_certificate_type_get2
811
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
812
certificate_type_get2.restype = _error_code
734
814
# Remove non-public functions
735
815
del _error_code, _retry_on_error
736
# Create the global "gnutls" object, simulating a module
739
818
def call_pipe(connection, # : multiprocessing.Connection
740
819
func, *args, **kwargs):
741
820
"""This function is meant to be called by multiprocessing.Process
743
822
This function runs func(*args, **kwargs), and writes the resulting
744
823
return value on the provided multiprocessing.Connection.
746
825
connection.send(func(*args, **kwargs))
747
826
connection.close()
749
class Client(object):
750
830
"""A representation of a client host served by this server.
753
833
approved: bool(); 'None' if not yet approved/disapproved
754
834
approval_delay: datetime.timedelta(); Time to wait for approval
755
835
approval_duration: datetime.timedelta(); Duration of one approval
756
checker: subprocess.Popen(); a running checker process used
757
to see if the client lives.
758
'None' if no process is running.
836
checker: multiprocessing.Process(); a running checker process used
837
to see if the client lives. 'None' if no process is
759
839
checker_callback_tag: a GLib event source tag, or None
760
840
checker_command: string; External command which is run to check
761
841
if client lives. %() expansions are done at
1430
1517
exc_info=error)
1431
1518
return xmlstring
1434
1522
dbus.OBJECT_MANAGER_IFACE
1435
1523
except AttributeError:
1436
1524
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1438
1527
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1439
1528
"""A D-Bus object with an ObjectManager.
1441
1530
Classes inheriting from this exposes the standard
1442
1531
GetManagedObjects call and the InterfacesAdded and
1443
1532
InterfacesRemoved signals on the standard
1444
1533
"org.freedesktop.DBus.ObjectManager" interface.
1446
1535
Note: No signals are sent automatically; they must be sent
1449
1538
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1450
out_signature = "a{oa{sa{sv}}}")
1539
out_signature="a{oa{sa{sv}}}")
1451
1540
def GetManagedObjects(self):
1452
1541
"""This function must be overridden"""
1453
1542
raise NotImplementedError()
1455
1544
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1456
signature = "oa{sa{sv}}")
1545
signature="oa{sa{sv}}")
1457
1546
def InterfacesAdded(self, object_path, interfaces_and_properties):
1460
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1549
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1461
1550
def InterfacesRemoved(self, object_path, interfaces):
1464
1553
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1465
out_signature = "s",
1466
path_keyword = 'object_path',
1467
connection_keyword = 'connection')
1555
path_keyword='object_path',
1556
connection_keyword='connection')
1468
1557
def Introspect(self, object_path, connection):
1469
1558
"""Overloading of standard D-Bus method.
1471
1560
Override return argument name of GetManagedObjects to be
1472
1561
"objpath_interfaces_and_properties"
2154
2253
class ClientHandler(socketserver.BaseRequestHandler, object):
2155
2254
"""A class to handle client connections.
2157
2256
Instantiated once for each connection to handle it.
2158
2257
Note: This will run in its own forked process."""
2160
2259
def handle(self):
2161
2260
with contextlib.closing(self.server.child_pipe) as child_pipe:
2162
2261
logger.info("TCP connection from: %s",
2163
2262
str(self.client_address))
2164
2263
logger.debug("Pipe FD: %d",
2165
2264
self.server.child_pipe.fileno())
2167
2266
session = gnutls.ClientSession(self.request)
2169
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
2170
# "+AES-256-CBC", "+SHA1",
2171
# "+COMP-NULL", "+CTYPE-OPENPGP",
2268
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2269
# "+AES-256-CBC", "+SHA1",
2270
# "+COMP-NULL", "+CTYPE-OPENPGP",
2173
2272
# Use a fallback default, since this MUST be set.
2174
2273
priority = self.server.gnutls_priority
2175
2274
if priority is None:
2176
2275
priority = "NORMAL"
2177
gnutls.priority_set_direct(session._c_object, priority,
2276
gnutls.priority_set_direct(session._c_object,
2277
priority.encode("utf-8"),
2180
2280
# Start communication using the Mandos protocol
2181
2281
# Get protocol number
2182
2282
line = self.request.makefile().readline()
2347
class MultiprocessingMixIn(object):
2504
class MultiprocessingMixIn:
2348
2505
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2350
2507
def sub_process_main(self, request, address):
2352
2509
self.finish_request(request, address)
2353
2510
except Exception:
2354
2511
self.handle_error(request, address)
2355
2512
self.close_request(request)
2357
2514
def process_request(self, request, address):
2358
2515
"""Start a new process to process the request."""
2359
proc = multiprocessing.Process(target = self.sub_process_main,
2360
args = (request, address))
2516
proc = multiprocessing.Process(target=self.sub_process_main,
2517
args=(request, address))
2365
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2522
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
2366
2523
""" adds a pipe to the MixIn """
2368
2525
def process_request(self, request, client_address):
2369
2526
"""Overrides and wraps the original process_request().
2371
2528
This function creates a new pipe in self.pipe
2373
2530
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2375
2532
proc = MultiprocessingMixIn.process_request(self, request,
2376
2533
client_address)
2377
2534
self.child_pipe.close()
2378
2535
self.add_pipe(parent_pipe, proc)
2380
2537
def add_pipe(self, parent_pipe, proc):
2381
2538
"""Dummy function; override as necessary"""
2382
2539
raise NotImplementedError()
2385
2542
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2386
socketserver.TCPServer, object):
2543
socketserver.TCPServer):
2387
2544
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2390
2547
enabled: Boolean; whether this server is activated yet
2391
2548
interface: None or a network interface name (string)
2392
2549
use_ipv6: Boolean; to use IPv6 or not
2395
2552
def __init__(self, server_address, RequestHandlerClass,
2396
2553
interface=None,
2430
2588
# socket_wrapper(), if socketfd was set.
2431
2589
socketserver.TCPServer.__init__(self, server_address,
2432
2590
RequestHandlerClass)
2434
2592
def server_bind(self):
2435
2593
"""This overrides the normal server_bind() function
2436
2594
to bind to an interface if one was specified, and also NOT to
2437
2595
bind to an address or port if they were not specified."""
2596
global SO_BINDTODEVICE
2438
2597
if self.interface is not None:
2439
2598
if SO_BINDTODEVICE is None:
2440
logger.error("SO_BINDTODEVICE does not exist;"
2441
" cannot bind to interface %s",
2445
self.socket.setsockopt(
2446
socket.SOL_SOCKET, SO_BINDTODEVICE,
2447
(self.interface + "\0").encode("utf-8"))
2448
except socket.error as error:
2449
if error.errno == errno.EPERM:
2450
logger.error("No permission to bind to"
2451
" interface %s", self.interface)
2452
elif error.errno == errno.ENOPROTOOPT:
2453
logger.error("SO_BINDTODEVICE not available;"
2454
" cannot bind to interface %s",
2456
elif error.errno == errno.ENODEV:
2457
logger.error("Interface %s does not exist,"
2458
" cannot bind", self.interface)
2599
# Fall back to a hard-coded value which seems to be
2601
logger.warning("SO_BINDTODEVICE not found, trying 25")
2602
SO_BINDTODEVICE = 25
2604
self.socket.setsockopt(
2605
socket.SOL_SOCKET, SO_BINDTODEVICE,
2606
(self.interface + "\0").encode("utf-8"))
2607
except socket.error as error:
2608
if error.errno == errno.EPERM:
2609
logger.error("No permission to bind to"
2610
" interface %s", self.interface)
2611
elif error.errno == errno.ENOPROTOOPT:
2612
logger.error("SO_BINDTODEVICE not available;"
2613
" cannot bind to interface %s",
2615
elif error.errno == errno.ENODEV:
2616
logger.error("Interface %s does not exist,"
2617
" cannot bind", self.interface)
2461
2620
# Only bind(2) the socket if we really need to.
2462
2621
if self.server_address[0] or self.server_address[1]:
2622
if self.server_address[1]:
2623
self.allow_reuse_address = True
2463
2624
if not self.server_address[0]:
2464
2625
if self.address_family == socket.AF_INET6:
2465
any_address = "::" # in6addr_any
2626
any_address = "::" # in6addr_any
2467
any_address = "0.0.0.0" # INADDR_ANY
2628
any_address = "0.0.0.0" # INADDR_ANY
2468
2629
self.server_address = (any_address,
2469
2630
self.server_address[1])
2470
2631
elif not self.server_address[1]:
2504
2665
self.gnutls_priority = gnutls_priority
2505
2666
IPv6_TCPServer.__init__(self, server_address,
2506
2667
RequestHandlerClass,
2507
interface = interface,
2508
use_ipv6 = use_ipv6,
2509
socketfd = socketfd)
2668
interface=interface,
2511
2672
def server_activate(self):
2512
2673
if self.enabled:
2513
2674
return socketserver.TCPServer.server_activate(self)
2515
2676
def enable(self):
2516
2677
self.enabled = True
2518
2679
def add_pipe(self, parent_pipe, proc):
2519
2680
# Call "handle_ipc" for both data and EOF events
2520
2681
GLib.io_add_watch(
2521
parent_pipe.fileno(),
2522
GLib.IO_IN | GLib.IO_HUP,
2682
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2683
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2523
2684
functools.partial(self.handle_ipc,
2524
parent_pipe = parent_pipe,
2685
parent_pipe=parent_pipe,
2527
2688
def handle_ipc(self, source, condition,
2528
2689
parent_pipe=None,
2530
2691
client_object=None):
2531
2692
# error, or the other end of multiprocessing.Pipe has closed
2532
2693
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2533
2694
# Wait for other process to exit
2537
2698
# Read a request from the child
2538
2699
request = parent_pipe.recv()
2539
2700
command = request[0]
2541
2702
if command == 'init':
2543
address = request[2]
2703
key_id = request[1].decode("ascii")
2704
fpr = request[2].decode("ascii")
2705
address = request[3]
2545
2707
for c in self.clients.values():
2546
if c.fingerprint == fpr:
2708
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2710
if key_id and c.key_id == key_id:
2713
if fpr and c.fingerprint == fpr:
2550
logger.info("Client not found for fingerprint: %s, ad"
2551
"dress: %s", fpr, address)
2717
logger.info("Client not found for key ID: %s, address"
2718
": %s", key_id or fpr, address)
2552
2719
if self.use_dbus:
2553
2720
# Emit D-Bus signal
2554
mandos_dbus_service.ClientNotFound(fpr,
2721
mandos_dbus_service.ClientNotFound(key_id or fpr,
2556
2723
parent_pipe.send(False)
2559
2726
GLib.io_add_watch(
2560
parent_pipe.fileno(),
2561
GLib.IO_IN | GLib.IO_HUP,
2727
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2728
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2562
2729
functools.partial(self.handle_ipc,
2563
parent_pipe = parent_pipe,
2565
client_object = client))
2730
parent_pipe=parent_pipe,
2732
client_object=client))
2566
2733
parent_pipe.send(True)
2567
2734
# remove the old hook in favor of the new above hook on
2585
2752
parent_pipe.send((
2586
2753
'data', client_object.__getattribute__(attrname)))
2588
2755
if command == 'setattr':
2589
2756
attrname = request[1]
2590
2757
value = request[2]
2591
2758
setattr(client_object, attrname, value)
2596
2763
def rfc3339_duration_to_delta(duration):
2597
2764
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2599
>>> rfc3339_duration_to_delta("P7D")
2600
datetime.timedelta(7)
2601
>>> rfc3339_duration_to_delta("PT60S")
2602
datetime.timedelta(0, 60)
2603
>>> rfc3339_duration_to_delta("PT60M")
2604
datetime.timedelta(0, 3600)
2605
>>> rfc3339_duration_to_delta("PT24H")
2606
datetime.timedelta(1)
2607
>>> rfc3339_duration_to_delta("P1W")
2608
datetime.timedelta(7)
2609
>>> rfc3339_duration_to_delta("PT5M30S")
2610
datetime.timedelta(0, 330)
2611
>>> rfc3339_duration_to_delta("P1DT3M20S")
2612
datetime.timedelta(1, 200)
2766
>>> rfc3339_duration_to_delta("P7D") == datetime.timedelta(7)
2768
>>> rfc3339_duration_to_delta("PT60S") == datetime.timedelta(0, 60)
2770
>>> rfc3339_duration_to_delta("PT60M") == datetime.timedelta(0, 3600)
2772
>>> rfc3339_duration_to_delta("PT24H") == datetime.timedelta(1)
2774
>>> rfc3339_duration_to_delta("P1W") == datetime.timedelta(7)
2776
>>> rfc3339_duration_to_delta("PT5M30S") == datetime.timedelta(0, 330)
2778
>>> rfc3339_duration_to_delta("P1DT3M20S") == datetime.timedelta(1, 200)
2615
2782
# Parsing an RFC 3339 duration with regular expressions is not
2616
2783
# possible - there would have to be multiple places for the same
2617
2784
# values, like seconds. The current code, while more esoteric, is
2618
2785
# cleaner without depending on a parsing library. If Python had a
2619
2786
# built-in library for parsing we would use it, but we'd like to
2620
2787
# avoid excessive use of external libraries.
2622
2789
# New type for defining tokens, syntax, and semantics all-in-one
2623
2790
Token = collections.namedtuple("Token", (
2624
2791
"regexp", # To match token; if "value" is not None, must have
2808
2978
parser.add_argument("--no-zeroconf", action="store_false",
2809
2979
dest="zeroconf", help="Do not use Zeroconf",
2812
2982
options = parser.parse_args()
2816
fail_count, test_count = doctest.testmod()
2817
sys.exit(os.EX_OK if fail_count == 0 else 1)
2819
2984
# Default values for config file for server-global settings
2820
server_defaults = { "interface": "",
2825
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2826
":+SIGN-DSA-SHA256",
2827
"servicename": "Mandos",
2833
"statedir": "/var/lib/mandos",
2834
"foreground": "False",
2985
if gnutls.has_rawpk:
2986
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2987
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2989
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2990
":+SIGN-DSA-SHA256")
2991
server_defaults = {"interface": "",
2995
"priority": priority,
2996
"servicename": "Mandos",
3002
"statedir": "/var/lib/mandos",
3003
"foreground": "False",
2838
3008
# Parse config file for server-global settings
2839
server_config = configparser.SafeConfigParser(server_defaults)
3009
server_config = configparser.ConfigParser(server_defaults)
2840
3010
del server_defaults
2841
3011
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2842
# Convert the SafeConfigParser object to a dict
3012
# Convert the ConfigParser object to a dict
2843
3013
server_settings = server_config.defaults()
2844
3014
# Use the appropriate methods on the non-string config options
2845
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
3015
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3016
"foreground", "zeroconf"):
2846
3017
server_settings[option] = server_config.getboolean("DEFAULT",
2848
3019
if server_settings["port"]:
3021
3192
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3022
3193
service = AvahiServiceToSyslog(
3023
name = server_settings["servicename"],
3024
servicetype = "_mandos._tcp",
3025
protocol = protocol,
3194
name=server_settings["servicename"],
3195
servicetype="_mandos._tcp",
3027
3198
if server_settings["interface"]:
3028
3199
service.interface = if_nametoindex(
3029
3200
server_settings["interface"].encode("utf-8"))
3031
3202
global multiprocessing_manager
3032
3203
multiprocessing_manager = multiprocessing.Manager()
3034
3205
client_class = Client
3036
client_class = functools.partial(ClientDBus, bus = bus)
3207
client_class = functools.partial(ClientDBus, bus=bus)
3038
3209
client_settings = Client.config_parser(client_config)
3039
3210
old_client_settings = {}
3040
3211
clients_data = {}
3042
3213
# This is used to redirect stdout and stderr for checker processes
3044
wnull = open(os.devnull, "w") # A writable /dev/null
3215
wnull = open(os.devnull, "w") # A writable /dev/null
3045
3216
# Only used if server is running in foreground but not in debug
3047
3218
if debug or not foreground:
3050
3221
# Get client data and settings from last running state.
3051
3222
if server_settings["restore"]:
3053
3224
with open(stored_state_path, "rb") as stored_state:
3054
if sys.version_info.major == 2:
3225
if sys.version_info.major == 2:
3055
3226
clients_data, old_client_settings = pickle.load(
3058
3229
bytes_clients_data, bytes_old_client_settings = (
3059
pickle.load(stored_state, encoding = "bytes"))
3060
### Fix bytes to strings
3230
pickle.load(stored_state, encoding="bytes"))
3231
# Fix bytes to strings
3063
clients_data = { (key.decode("utf-8")
3064
if isinstance(key, bytes)
3067
bytes_clients_data.items() }
3234
clients_data = {(key.decode("utf-8")
3235
if isinstance(key, bytes)
3238
bytes_clients_data.items()}
3068
3239
del bytes_clients_data
3069
3240
for key in clients_data:
3070
value = { (k.decode("utf-8")
3071
if isinstance(k, bytes) else k): v
3073
clients_data[key].items() }
3241
value = {(k.decode("utf-8")
3242
if isinstance(k, bytes) else k): v
3244
clients_data[key].items()}
3074
3245
clients_data[key] = value
3075
3246
# .client_structure
3076
3247
value["client_structure"] = [
3077
3248
(s.decode("utf-8")
3078
3249
if isinstance(s, bytes)
3079
3250
else s) for s in
3080
value["client_structure"] ]
3082
for k in ("name", "host"):
3251
value["client_structure"]]
3252
# .name, .host, and .checker_command
3253
for k in ("name", "host", "checker_command"):
3083
3254
if isinstance(value[k], bytes):
3084
3255
value[k] = value[k].decode("utf-8")
3085
## old_client_settings
3256
if "key_id" not in value:
3257
value["key_id"] = ""
3258
elif "fingerprint" not in value:
3259
value["fingerprint"] = ""
3260
# old_client_settings
3087
3262
old_client_settings = {
3088
3263
(key.decode("utf-8")
3089
3264
if isinstance(key, bytes)
3090
3265
else key): value
3091
3266
for key, value in
3092
bytes_old_client_settings.items() }
3267
bytes_old_client_settings.items()}
3093
3268
del bytes_old_client_settings
3269
# .host and .checker_command
3095
3270
for value in old_client_settings.values():
3096
if isinstance(value["host"], bytes):
3097
value["host"] = (value["host"]
3271
for attribute in ("host", "checker_command"):
3272
if isinstance(value[attribute], bytes):
3273
value[attribute] = (value[attribute]
3099
3275
os.remove(stored_state_path)
3100
3276
except IOError as e:
3101
3277
if e.errno == errno.ENOENT: