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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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# In Python 2.7 it seems to have been removed entirely.
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# Try running the C preprocessor:
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cc = subprocess.Popen(["cc", "--language=c", "-E",
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE)
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stdout = cc.communicate(
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"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
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SO_BINDTODEVICE = int(stdout.splitlines()[-1])
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except (OSError, ValueError, IndexError):
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SO_BINDTODEVICE = None
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if sys.version_info.major == 2:
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if sys.version_info < (3, 2):
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configparser.Configparser = configparser.SafeConfigParser
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stored_state_file = "clients.pickle"
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logger = logging.getLogger()
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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
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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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733
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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bye.errcheck = _retry_on_error
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742
check_version = _library.gnutls_check_version
700
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check_version.argtypes = [ctypes.c_char_p]
701
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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
705
openpgp_crt_init = _library.gnutls_openpgp_crt_init
706
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
707
openpgp_crt_init.restype = _error_code
709
openpgp_crt_import = _library.gnutls_openpgp_crt_import
710
openpgp_crt_import.argtypes = [openpgp_crt_t,
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ctypes.POINTER(datum_t),
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openpgp_crt_import.restype = _error_code
715
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
716
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
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ctypes.POINTER(ctypes.c_uint)]
718
openpgp_crt_verify_self.restype = _error_code
720
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
721
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
722
openpgp_crt_deinit.restype = None
724
openpgp_crt_get_fingerprint = (
725
_library.gnutls_openpgp_crt_get_fingerprint)
726
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
730
openpgp_crt_get_fingerprint.restype = _error_code
746
_need_version = b"3.3.0"
747
if check_version(_need_version) is None:
748
raise self.Error("Needs GnuTLS {} or later"
749
.format(_need_version))
751
_tls_rawpk_version = b"3.6.6"
752
has_rawpk = bool(check_version(_tls_rawpk_version))
756
class pubkey_st(ctypes.Structure):
758
pubkey_t = ctypes.POINTER(pubkey_st)
760
x509_crt_fmt_t = ctypes.c_int
762
# All the function declarations below are from gnutls/abstract.h
763
pubkey_init = _library.gnutls_pubkey_init
764
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
765
pubkey_init.restype = _error_code
767
pubkey_import = _library.gnutls_pubkey_import
768
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
770
pubkey_import.restype = _error_code
772
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
773
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
774
ctypes.POINTER(ctypes.c_ubyte),
775
ctypes.POINTER(ctypes.c_size_t)]
776
pubkey_get_key_id.restype = _error_code
778
pubkey_deinit = _library.gnutls_pubkey_deinit
779
pubkey_deinit.argtypes = [pubkey_t]
780
pubkey_deinit.restype = None
782
# All the function declarations below are from gnutls/openpgp.h
784
openpgp_crt_init = _library.gnutls_openpgp_crt_init
785
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
786
openpgp_crt_init.restype = _error_code
788
openpgp_crt_import = _library.gnutls_openpgp_crt_import
789
openpgp_crt_import.argtypes = [openpgp_crt_t,
790
ctypes.POINTER(datum_t),
792
openpgp_crt_import.restype = _error_code
794
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
795
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
796
ctypes.POINTER(ctypes.c_uint)]
797
openpgp_crt_verify_self.restype = _error_code
799
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
800
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
801
openpgp_crt_deinit.restype = None
803
openpgp_crt_get_fingerprint = (
804
_library.gnutls_openpgp_crt_get_fingerprint)
805
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
809
openpgp_crt_get_fingerprint.restype = _error_code
811
if check_version(b"3.6.4"):
812
certificate_type_get2 = _library.gnutls_certificate_type_get2
813
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
814
certificate_type_get2.restype = _error_code
732
816
# Remove non-public functions
733
817
del _error_code, _retry_on_error
734
# Create the global "gnutls" object, simulating a module
737
820
def call_pipe(connection, # : multiprocessing.Connection
738
821
func, *args, **kwargs):
739
822
"""This function is meant to be called by multiprocessing.Process
741
824
This function runs func(*args, **kwargs), and writes the resulting
742
825
return value on the provided multiprocessing.Connection.
744
827
connection.send(func(*args, **kwargs))
745
828
connection.close()
747
class Client(object):
748
832
"""A representation of a client host served by this server.
751
835
approved: bool(); 'None' if not yet approved/disapproved
752
836
approval_delay: datetime.timedelta(); Time to wait for approval
753
837
approval_duration: datetime.timedelta(); Duration of one approval
754
checker: subprocess.Popen(); a running checker process used
755
to see if the client lives.
756
'None' if no process is running.
838
checker: multiprocessing.Process(); a running checker process used
839
to see if the client lives. 'None' if no process is
757
841
checker_callback_tag: a GLib event source tag, or None
758
842
checker_command: string; External command which is run to check
759
843
if client lives. %() expansions are done at
1428
1519
exc_info=error)
1429
1520
return xmlstring
1432
1524
dbus.OBJECT_MANAGER_IFACE
1433
1525
except AttributeError:
1434
1526
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1436
1529
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1437
1530
"""A D-Bus object with an ObjectManager.
1439
1532
Classes inheriting from this exposes the standard
1440
1533
GetManagedObjects call and the InterfacesAdded and
1441
1534
InterfacesRemoved signals on the standard
1442
1535
"org.freedesktop.DBus.ObjectManager" interface.
1444
1537
Note: No signals are sent automatically; they must be sent
1447
1540
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1448
out_signature = "a{oa{sa{sv}}}")
1541
out_signature="a{oa{sa{sv}}}")
1449
1542
def GetManagedObjects(self):
1450
1543
"""This function must be overridden"""
1451
1544
raise NotImplementedError()
1453
1546
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1454
signature = "oa{sa{sv}}")
1547
signature="oa{sa{sv}}")
1455
1548
def InterfacesAdded(self, object_path, interfaces_and_properties):
1458
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1551
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1459
1552
def InterfacesRemoved(self, object_path, interfaces):
1462
1555
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1463
out_signature = "s",
1464
path_keyword = 'object_path',
1465
connection_keyword = 'connection')
1557
path_keyword='object_path',
1558
connection_keyword='connection')
1466
1559
def Introspect(self, object_path, connection):
1467
1560
"""Overloading of standard D-Bus method.
1469
1562
Override return argument name of GetManagedObjects to be
1470
1563
"objpath_interfaces_and_properties"
2152
2255
class ClientHandler(socketserver.BaseRequestHandler, object):
2153
2256
"""A class to handle client connections.
2155
2258
Instantiated once for each connection to handle it.
2156
2259
Note: This will run in its own forked process."""
2158
2261
def handle(self):
2159
2262
with contextlib.closing(self.server.child_pipe) as child_pipe:
2160
2263
logger.info("TCP connection from: %s",
2161
2264
str(self.client_address))
2162
2265
logger.debug("Pipe FD: %d",
2163
2266
self.server.child_pipe.fileno())
2165
2268
session = gnutls.ClientSession(self.request)
2167
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
2168
# "+AES-256-CBC", "+SHA1",
2169
# "+COMP-NULL", "+CTYPE-OPENPGP",
2270
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2271
# "+AES-256-CBC", "+SHA1",
2272
# "+COMP-NULL", "+CTYPE-OPENPGP",
2171
2274
# Use a fallback default, since this MUST be set.
2172
2275
priority = self.server.gnutls_priority
2173
2276
if priority is None:
2174
2277
priority = "NORMAL"
2175
gnutls.priority_set_direct(session._c_object, priority,
2278
gnutls.priority_set_direct(session._c_object,
2279
priority.encode("utf-8"),
2178
2282
# Start communication using the Mandos protocol
2179
2283
# Get protocol number
2180
2284
line = self.request.makefile().readline()
2345
class MultiprocessingMixIn(object):
2506
class MultiprocessingMixIn:
2346
2507
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2348
2509
def sub_process_main(self, request, address):
2350
2511
self.finish_request(request, address)
2351
2512
except Exception:
2352
2513
self.handle_error(request, address)
2353
2514
self.close_request(request)
2355
2516
def process_request(self, request, address):
2356
2517
"""Start a new process to process the request."""
2357
proc = multiprocessing.Process(target = self.sub_process_main,
2358
args = (request, address))
2518
proc = multiprocessing.Process(target=self.sub_process_main,
2519
args=(request, address))
2363
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2524
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
2364
2525
""" adds a pipe to the MixIn """
2366
2527
def process_request(self, request, client_address):
2367
2528
"""Overrides and wraps the original process_request().
2369
2530
This function creates a new pipe in self.pipe
2371
2532
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2373
2534
proc = MultiprocessingMixIn.process_request(self, request,
2374
2535
client_address)
2375
2536
self.child_pipe.close()
2376
2537
self.add_pipe(parent_pipe, proc)
2378
2539
def add_pipe(self, parent_pipe, proc):
2379
2540
"""Dummy function; override as necessary"""
2380
2541
raise NotImplementedError()
2383
2544
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2384
socketserver.TCPServer, object):
2545
socketserver.TCPServer):
2385
2546
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2388
2549
enabled: Boolean; whether this server is activated yet
2389
2550
interface: None or a network interface name (string)
2390
2551
use_ipv6: Boolean; to use IPv6 or not
2393
2554
def __init__(self, server_address, RequestHandlerClass,
2394
2555
interface=None,
2428
2590
# socket_wrapper(), if socketfd was set.
2429
2591
socketserver.TCPServer.__init__(self, server_address,
2430
2592
RequestHandlerClass)
2432
2594
def server_bind(self):
2433
2595
"""This overrides the normal server_bind() function
2434
2596
to bind to an interface if one was specified, and also NOT to
2435
2597
bind to an address or port if they were not specified."""
2598
global SO_BINDTODEVICE
2436
2599
if self.interface is not None:
2437
2600
if SO_BINDTODEVICE is None:
2438
logger.error("SO_BINDTODEVICE does not exist;"
2439
" cannot bind to interface %s",
2443
self.socket.setsockopt(
2444
socket.SOL_SOCKET, SO_BINDTODEVICE,
2445
(self.interface + "\0").encode("utf-8"))
2446
except socket.error as error:
2447
if error.errno == errno.EPERM:
2448
logger.error("No permission to bind to"
2449
" interface %s", self.interface)
2450
elif error.errno == errno.ENOPROTOOPT:
2451
logger.error("SO_BINDTODEVICE not available;"
2452
" cannot bind to interface %s",
2454
elif error.errno == errno.ENODEV:
2455
logger.error("Interface %s does not exist,"
2456
" cannot bind", self.interface)
2601
# Fall back to a hard-coded value which seems to be
2603
logger.warning("SO_BINDTODEVICE not found, trying 25")
2604
SO_BINDTODEVICE = 25
2606
self.socket.setsockopt(
2607
socket.SOL_SOCKET, SO_BINDTODEVICE,
2608
(self.interface + "\0").encode("utf-8"))
2609
except socket.error as error:
2610
if error.errno == errno.EPERM:
2611
logger.error("No permission to bind to"
2612
" interface %s", self.interface)
2613
elif error.errno == errno.ENOPROTOOPT:
2614
logger.error("SO_BINDTODEVICE not available;"
2615
" cannot bind to interface %s",
2617
elif error.errno == errno.ENODEV:
2618
logger.error("Interface %s does not exist,"
2619
" cannot bind", self.interface)
2459
2622
# Only bind(2) the socket if we really need to.
2460
2623
if self.server_address[0] or self.server_address[1]:
2624
if self.server_address[1]:
2625
self.allow_reuse_address = True
2461
2626
if not self.server_address[0]:
2462
2627
if self.address_family == socket.AF_INET6:
2463
any_address = "::" # in6addr_any
2628
any_address = "::" # in6addr_any
2465
any_address = "0.0.0.0" # INADDR_ANY
2630
any_address = "0.0.0.0" # INADDR_ANY
2466
2631
self.server_address = (any_address,
2467
2632
self.server_address[1])
2468
2633
elif not self.server_address[1]:
2502
2667
self.gnutls_priority = gnutls_priority
2503
2668
IPv6_TCPServer.__init__(self, server_address,
2504
2669
RequestHandlerClass,
2505
interface = interface,
2506
use_ipv6 = use_ipv6,
2507
socketfd = socketfd)
2670
interface=interface,
2509
2674
def server_activate(self):
2510
2675
if self.enabled:
2511
2676
return socketserver.TCPServer.server_activate(self)
2513
2678
def enable(self):
2514
2679
self.enabled = True
2516
2681
def add_pipe(self, parent_pipe, proc):
2517
2682
# Call "handle_ipc" for both data and EOF events
2518
2683
GLib.io_add_watch(
2519
parent_pipe.fileno(),
2520
GLib.IO_IN | GLib.IO_HUP,
2684
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2685
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2521
2686
functools.partial(self.handle_ipc,
2522
parent_pipe = parent_pipe,
2687
parent_pipe=parent_pipe,
2525
2690
def handle_ipc(self, source, condition,
2526
2691
parent_pipe=None,
2528
2693
client_object=None):
2529
2694
# error, or the other end of multiprocessing.Pipe has closed
2530
2695
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2531
2696
# Wait for other process to exit
2535
2700
# Read a request from the child
2536
2701
request = parent_pipe.recv()
2537
2702
command = request[0]
2539
2704
if command == 'init':
2541
address = request[2]
2705
key_id = request[1].decode("ascii")
2706
fpr = request[2].decode("ascii")
2707
address = request[3]
2543
2709
for c in self.clients.values():
2544
if c.fingerprint == fpr:
2710
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2712
if key_id and c.key_id == key_id:
2715
if fpr and c.fingerprint == fpr:
2548
logger.info("Client not found for fingerprint: %s, ad"
2549
"dress: %s", fpr, address)
2719
logger.info("Client not found for key ID: %s, address"
2720
": %s", key_id or fpr, address)
2550
2721
if self.use_dbus:
2551
2722
# Emit D-Bus signal
2552
mandos_dbus_service.ClientNotFound(fpr,
2723
mandos_dbus_service.ClientNotFound(key_id or fpr,
2554
2725
parent_pipe.send(False)
2557
2728
GLib.io_add_watch(
2558
parent_pipe.fileno(),
2559
GLib.IO_IN | GLib.IO_HUP,
2729
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2730
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2560
2731
functools.partial(self.handle_ipc,
2561
parent_pipe = parent_pipe,
2563
client_object = client))
2732
parent_pipe=parent_pipe,
2734
client_object=client))
2564
2735
parent_pipe.send(True)
2565
2736
# remove the old hook in favor of the new above hook on
2583
2754
parent_pipe.send((
2584
2755
'data', client_object.__getattribute__(attrname)))
2586
2757
if command == 'setattr':
2587
2758
attrname = request[1]
2588
2759
value = request[2]
2589
2760
setattr(client_object, attrname, value)
2594
2765
def rfc3339_duration_to_delta(duration):
2595
2766
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2597
>>> rfc3339_duration_to_delta("P7D")
2598
datetime.timedelta(7)
2599
>>> rfc3339_duration_to_delta("PT60S")
2600
datetime.timedelta(0, 60)
2601
>>> rfc3339_duration_to_delta("PT60M")
2602
datetime.timedelta(0, 3600)
2603
>>> rfc3339_duration_to_delta("PT24H")
2604
datetime.timedelta(1)
2605
>>> rfc3339_duration_to_delta("P1W")
2606
datetime.timedelta(7)
2607
>>> rfc3339_duration_to_delta("PT5M30S")
2608
datetime.timedelta(0, 330)
2609
>>> rfc3339_duration_to_delta("P1DT3M20S")
2610
datetime.timedelta(1, 200)
2768
>>> rfc3339_duration_to_delta("P7D") == datetime.timedelta(7)
2770
>>> rfc3339_duration_to_delta("PT60S") == datetime.timedelta(0, 60)
2772
>>> rfc3339_duration_to_delta("PT60M") == datetime.timedelta(0, 3600)
2774
>>> rfc3339_duration_to_delta("PT24H") == datetime.timedelta(1)
2776
>>> rfc3339_duration_to_delta("P1W") == datetime.timedelta(7)
2778
>>> rfc3339_duration_to_delta("PT5M30S") == datetime.timedelta(0, 330)
2780
>>> rfc3339_duration_to_delta("P1DT3M20S") == datetime.timedelta(1, 200)
2613
2784
# Parsing an RFC 3339 duration with regular expressions is not
2614
2785
# possible - there would have to be multiple places for the same
2615
2786
# values, like seconds. The current code, while more esoteric, is
2616
2787
# cleaner without depending on a parsing library. If Python had a
2617
2788
# built-in library for parsing we would use it, but we'd like to
2618
2789
# avoid excessive use of external libraries.
2620
2791
# New type for defining tokens, syntax, and semantics all-in-one
2621
2792
Token = collections.namedtuple("Token", (
2622
2793
"regexp", # To match token; if "value" is not None, must have
2806
2980
parser.add_argument("--no-zeroconf", action="store_false",
2807
2981
dest="zeroconf", help="Do not use Zeroconf",
2810
2984
options = parser.parse_args()
2814
fail_count, test_count = doctest.testmod()
2815
sys.exit(os.EX_OK if fail_count == 0 else 1)
2817
2986
# Default values for config file for server-global settings
2818
server_defaults = { "interface": "",
2823
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2824
":+SIGN-DSA-SHA256",
2825
"servicename": "Mandos",
2831
"statedir": "/var/lib/mandos",
2832
"foreground": "False",
2987
if gnutls.has_rawpk:
2988
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2989
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2991
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2992
":+SIGN-DSA-SHA256")
2993
server_defaults = {"interface": "",
2997
"priority": priority,
2998
"servicename": "Mandos",
3004
"statedir": "/var/lib/mandos",
3005
"foreground": "False",
2836
3010
# Parse config file for server-global settings
2837
server_config = configparser.SafeConfigParser(server_defaults)
3011
server_config = configparser.ConfigParser(server_defaults)
2838
3012
del server_defaults
2839
3013
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2840
# Convert the SafeConfigParser object to a dict
3014
# Convert the ConfigParser object to a dict
2841
3015
server_settings = server_config.defaults()
2842
3016
# Use the appropriate methods on the non-string config options
2843
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
3017
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3018
"foreground", "zeroconf"):
2844
3019
server_settings[option] = server_config.getboolean("DEFAULT",
2846
3021
if server_settings["port"]:
3019
3194
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3020
3195
service = AvahiServiceToSyslog(
3021
name = server_settings["servicename"],
3022
servicetype = "_mandos._tcp",
3023
protocol = protocol,
3196
name=server_settings["servicename"],
3197
servicetype="_mandos._tcp",
3025
3200
if server_settings["interface"]:
3026
3201
service.interface = if_nametoindex(
3027
3202
server_settings["interface"].encode("utf-8"))
3029
3204
global multiprocessing_manager
3030
3205
multiprocessing_manager = multiprocessing.Manager()
3032
3207
client_class = Client
3034
client_class = functools.partial(ClientDBus, bus = bus)
3209
client_class = functools.partial(ClientDBus, bus=bus)
3036
3211
client_settings = Client.config_parser(client_config)
3037
3212
old_client_settings = {}
3038
3213
clients_data = {}
3040
3215
# This is used to redirect stdout and stderr for checker processes
3042
wnull = open(os.devnull, "w") # A writable /dev/null
3217
wnull = open(os.devnull, "w") # A writable /dev/null
3043
3218
# Only used if server is running in foreground but not in debug
3045
3220
if debug or not foreground:
3048
3223
# Get client data and settings from last running state.
3049
3224
if server_settings["restore"]:
3051
3226
with open(stored_state_path, "rb") as stored_state:
3052
if sys.version_info.major == 2:
3227
if sys.version_info.major == 2:
3053
3228
clients_data, old_client_settings = pickle.load(
3056
3231
bytes_clients_data, bytes_old_client_settings = (
3057
pickle.load(stored_state, encoding = "bytes"))
3058
### Fix bytes to strings
3232
pickle.load(stored_state, encoding="bytes"))
3233
# Fix bytes to strings
3061
clients_data = { (key.decode("utf-8")
3062
if isinstance(key, bytes)
3065
bytes_clients_data.items() }
3236
clients_data = {(key.decode("utf-8")
3237
if isinstance(key, bytes)
3240
bytes_clients_data.items()}
3066
3241
del bytes_clients_data
3067
3242
for key in clients_data:
3068
value = { (k.decode("utf-8")
3069
if isinstance(k, bytes) else k): v
3071
clients_data[key].items() }
3243
value = {(k.decode("utf-8")
3244
if isinstance(k, bytes) else k): v
3246
clients_data[key].items()}
3072
3247
clients_data[key] = value
3073
3248
# .client_structure
3074
3249
value["client_structure"] = [
3075
3250
(s.decode("utf-8")
3076
3251
if isinstance(s, bytes)
3077
3252
else s) for s in
3078
value["client_structure"] ]
3253
value["client_structure"]]
3079
3254
# .name & .host
3080
3255
for k in ("name", "host"):
3081
3256
if isinstance(value[k], bytes):
3082
3257
value[k] = value[k].decode("utf-8")
3083
## old_client_settings
3258
if "key_id" not in value:
3259
value["key_id"] = ""
3260
elif "fingerprint" not in value:
3261
value["fingerprint"] = ""
3262
# old_client_settings
3085
3264
old_client_settings = {
3086
3265
(key.decode("utf-8")
3087
3266
if isinstance(key, bytes)
3088
3267
else key): value
3089
3268
for key, value in
3090
bytes_old_client_settings.items() }
3269
bytes_old_client_settings.items()}
3091
3270
del bytes_old_client_settings
3093
3272
for value in old_client_settings.values():