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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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# Add collections.abc.Callable if it does not exist
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collections.abc.Callable
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except AttributeError:
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Callable = collections.Callable
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collections.abc = abc
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# Add shlex.quote if it does not exist
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except AttributeError:
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shlex.quote = re.escape
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# Show warnings by default
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if not sys.warnoptions:
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warnings.simplefilter("default")
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# Try to find the value of SO_BINDTODEVICE:
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# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
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# newer, and it is also the most natural place for it:
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SO_BINDTODEVICE = socket.SO_BINDTODEVICE
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except AttributeError:
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# This is where SO_BINDTODEVICE was up to and including Python
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from IN import SO_BINDTODEVICE
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except ImportError:
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SO_BINDTODEVICE = None
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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
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global_set_log_function.argtypes = [log_func]
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global_set_log_function.restype = None
681
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deinit = _library.gnutls_deinit
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deinit.argtypes = [session_t]
683
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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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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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check_version = _library.gnutls_check_version
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check_version.argtypes = [ctypes.c_char_p]
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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
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openpgp_crt_import = _library.gnutls_openpgp_crt_import
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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
761
_need_version = b"3.3.0"
762
if check_version(_need_version) is None:
763
raise self.Error("Needs GnuTLS {} or later"
764
.format(_need_version))
766
_tls_rawpk_version = b"3.6.6"
767
has_rawpk = bool(check_version(_tls_rawpk_version))
771
class pubkey_st(ctypes.Structure):
773
pubkey_t = ctypes.POINTER(pubkey_st)
775
x509_crt_fmt_t = ctypes.c_int
777
# All the function declarations below are from gnutls/abstract.h
778
pubkey_init = _library.gnutls_pubkey_init
779
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
780
pubkey_init.restype = _error_code
782
pubkey_import = _library.gnutls_pubkey_import
783
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
785
pubkey_import.restype = _error_code
787
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
788
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
789
ctypes.POINTER(ctypes.c_ubyte),
790
ctypes.POINTER(ctypes.c_size_t)]
791
pubkey_get_key_id.restype = _error_code
793
pubkey_deinit = _library.gnutls_pubkey_deinit
794
pubkey_deinit.argtypes = [pubkey_t]
795
pubkey_deinit.restype = None
797
# All the function declarations below are from gnutls/openpgp.h
799
openpgp_crt_init = _library.gnutls_openpgp_crt_init
800
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
801
openpgp_crt_init.restype = _error_code
803
openpgp_crt_import = _library.gnutls_openpgp_crt_import
804
openpgp_crt_import.argtypes = [openpgp_crt_t,
805
ctypes.POINTER(datum_t),
807
openpgp_crt_import.restype = _error_code
809
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
810
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
811
ctypes.POINTER(ctypes.c_uint)]
812
openpgp_crt_verify_self.restype = _error_code
814
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
815
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
816
openpgp_crt_deinit.restype = None
818
openpgp_crt_get_fingerprint = (
819
_library.gnutls_openpgp_crt_get_fingerprint)
820
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
824
openpgp_crt_get_fingerprint.restype = _error_code
826
if check_version(b"3.6.4"):
827
certificate_type_get2 = _library.gnutls_certificate_type_get2
828
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
829
certificate_type_get2.restype = _error_code
732
831
# Remove non-public functions
733
832
del _error_code, _retry_on_error
734
# Create the global "gnutls" object, simulating a module
737
835
def call_pipe(connection, # : multiprocessing.Connection
738
836
func, *args, **kwargs):
739
837
"""This function is meant to be called by multiprocessing.Process
741
839
This function runs func(*args, **kwargs), and writes the resulting
742
840
return value on the provided multiprocessing.Connection.
744
842
connection.send(func(*args, **kwargs))
745
843
connection.close()
747
class Client(object):
748
847
"""A representation of a client host served by this server.
751
850
approved: bool(); 'None' if not yet approved/disapproved
752
851
approval_delay: datetime.timedelta(); Time to wait for approval
753
852
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.
853
checker: multiprocessing.Process(); a running checker process used
854
to see if the client lives. 'None' if no process is
757
856
checker_callback_tag: a GLib event source tag, or None
758
857
checker_command: string; External command which is run to check
759
858
if client lives. %() expansions are done at
1428
1535
exc_info=error)
1429
1536
return xmlstring
1432
1540
dbus.OBJECT_MANAGER_IFACE
1433
1541
except AttributeError:
1434
1542
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1436
1545
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1437
1546
"""A D-Bus object with an ObjectManager.
1439
1548
Classes inheriting from this exposes the standard
1440
1549
GetManagedObjects call and the InterfacesAdded and
1441
1550
InterfacesRemoved signals on the standard
1442
1551
"org.freedesktop.DBus.ObjectManager" interface.
1444
1553
Note: No signals are sent automatically; they must be sent
1447
1556
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1448
out_signature = "a{oa{sa{sv}}}")
1557
out_signature="a{oa{sa{sv}}}")
1449
1558
def GetManagedObjects(self):
1450
1559
"""This function must be overridden"""
1451
1560
raise NotImplementedError()
1453
1562
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1454
signature = "oa{sa{sv}}")
1563
signature="oa{sa{sv}}")
1455
1564
def InterfacesAdded(self, object_path, interfaces_and_properties):
1458
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1567
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1459
1568
def InterfacesRemoved(self, object_path, interfaces):
1462
1571
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1463
out_signature = "s",
1464
path_keyword = 'object_path',
1465
connection_keyword = 'connection')
1573
path_keyword='object_path',
1574
connection_keyword='connection')
1466
1575
def Introspect(self, object_path, connection):
1467
1576
"""Overloading of standard D-Bus method.
1469
1578
Override return argument name of GetManagedObjects to be
1470
1579
"objpath_interfaces_and_properties"
2152
2271
class ClientHandler(socketserver.BaseRequestHandler, object):
2153
2272
"""A class to handle client connections.
2155
2274
Instantiated once for each connection to handle it.
2156
2275
Note: This will run in its own forked process."""
2158
2277
def handle(self):
2159
2278
with contextlib.closing(self.server.child_pipe) as child_pipe:
2160
2279
logger.info("TCP connection from: %s",
2161
2280
str(self.client_address))
2162
2281
logger.debug("Pipe FD: %d",
2163
2282
self.server.child_pipe.fileno())
2165
2284
session = gnutls.ClientSession(self.request)
2167
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
2168
# "+AES-256-CBC", "+SHA1",
2169
# "+COMP-NULL", "+CTYPE-OPENPGP",
2286
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2287
# "+AES-256-CBC", "+SHA1",
2288
# "+COMP-NULL", "+CTYPE-OPENPGP",
2171
2290
# Use a fallback default, since this MUST be set.
2172
2291
priority = self.server.gnutls_priority
2173
2292
if priority is None:
2174
2293
priority = "NORMAL"
2175
gnutls.priority_set_direct(session._c_object, priority,
2294
gnutls.priority_set_direct(session._c_object,
2295
priority.encode("utf-8"),
2178
2298
# Start communication using the Mandos protocol
2179
2299
# Get protocol number
2180
2300
line = self.request.makefile().readline()
2345
class MultiprocessingMixIn(object):
2522
class MultiprocessingMixIn:
2346
2523
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2348
2525
def sub_process_main(self, request, address):
2350
2527
self.finish_request(request, address)
2351
2528
except Exception:
2352
2529
self.handle_error(request, address)
2353
2530
self.close_request(request)
2355
2532
def process_request(self, request, address):
2356
2533
"""Start a new process to process the request."""
2357
proc = multiprocessing.Process(target = self.sub_process_main,
2358
args = (request, address))
2534
proc = multiprocessing.Process(target=self.sub_process_main,
2535
args=(request, address))
2363
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2540
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
2364
2541
""" adds a pipe to the MixIn """
2366
2543
def process_request(self, request, client_address):
2367
2544
"""Overrides and wraps the original process_request().
2369
2546
This function creates a new pipe in self.pipe
2371
2548
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2373
2550
proc = MultiprocessingMixIn.process_request(self, request,
2374
2551
client_address)
2375
2552
self.child_pipe.close()
2376
2553
self.add_pipe(parent_pipe, proc)
2378
2555
def add_pipe(self, parent_pipe, proc):
2379
2556
"""Dummy function; override as necessary"""
2380
2557
raise NotImplementedError()
2383
2560
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2384
socketserver.TCPServer, object):
2561
socketserver.TCPServer):
2385
2562
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2388
2565
enabled: Boolean; whether this server is activated yet
2389
2566
interface: None or a network interface name (string)
2390
2567
use_ipv6: Boolean; to use IPv6 or not
2393
2570
def __init__(self, server_address, RequestHandlerClass,
2394
2571
interface=None,
2428
2606
# socket_wrapper(), if socketfd was set.
2429
2607
socketserver.TCPServer.__init__(self, server_address,
2430
2608
RequestHandlerClass)
2432
2610
def server_bind(self):
2433
2611
"""This overrides the normal server_bind() function
2434
2612
to bind to an interface if one was specified, and also NOT to
2435
2613
bind to an address or port if they were not specified."""
2614
global SO_BINDTODEVICE
2436
2615
if self.interface is not None:
2437
2616
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)
2617
# Fall back to a hard-coded value which seems to be
2619
logger.warning("SO_BINDTODEVICE not found, trying 25")
2620
SO_BINDTODEVICE = 25
2622
self.socket.setsockopt(
2623
socket.SOL_SOCKET, SO_BINDTODEVICE,
2624
(self.interface + "\0").encode("utf-8"))
2625
except socket.error as error:
2626
if error.errno == errno.EPERM:
2627
logger.error("No permission to bind to"
2628
" interface %s", self.interface)
2629
elif error.errno == errno.ENOPROTOOPT:
2630
logger.error("SO_BINDTODEVICE not available;"
2631
" cannot bind to interface %s",
2633
elif error.errno == errno.ENODEV:
2634
logger.error("Interface %s does not exist,"
2635
" cannot bind", self.interface)
2459
2638
# Only bind(2) the socket if we really need to.
2460
2639
if self.server_address[0] or self.server_address[1]:
2640
if self.server_address[1]:
2641
self.allow_reuse_address = True
2461
2642
if not self.server_address[0]:
2462
2643
if self.address_family == socket.AF_INET6:
2463
any_address = "::" # in6addr_any
2644
any_address = "::" # in6addr_any
2465
any_address = "0.0.0.0" # INADDR_ANY
2646
any_address = "0.0.0.0" # INADDR_ANY
2466
2647
self.server_address = (any_address,
2467
2648
self.server_address[1])
2468
2649
elif not self.server_address[1]:
2502
2683
self.gnutls_priority = gnutls_priority
2503
2684
IPv6_TCPServer.__init__(self, server_address,
2504
2685
RequestHandlerClass,
2505
interface = interface,
2506
use_ipv6 = use_ipv6,
2507
socketfd = socketfd)
2686
interface=interface,
2509
2690
def server_activate(self):
2510
2691
if self.enabled:
2511
2692
return socketserver.TCPServer.server_activate(self)
2513
2694
def enable(self):
2514
2695
self.enabled = True
2516
2697
def add_pipe(self, parent_pipe, proc):
2517
2698
# Call "handle_ipc" for both data and EOF events
2518
2699
GLib.io_add_watch(
2519
parent_pipe.fileno(),
2520
GLib.IO_IN | GLib.IO_HUP,
2700
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2701
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2521
2702
functools.partial(self.handle_ipc,
2522
parent_pipe = parent_pipe,
2703
parent_pipe=parent_pipe,
2525
2706
def handle_ipc(self, source, condition,
2526
2707
parent_pipe=None,
2528
2709
client_object=None):
2529
2710
# error, or the other end of multiprocessing.Pipe has closed
2530
2711
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2531
2712
# Wait for other process to exit
2535
2716
# Read a request from the child
2536
2717
request = parent_pipe.recv()
2537
2718
command = request[0]
2539
2720
if command == 'init':
2541
address = request[2]
2721
key_id = request[1].decode("ascii")
2722
fpr = request[2].decode("ascii")
2723
address = request[3]
2543
2725
for c in self.clients.values():
2544
if c.fingerprint == fpr:
2726
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2728
if key_id and c.key_id == key_id:
2731
if fpr and c.fingerprint == fpr:
2548
logger.info("Client not found for fingerprint: %s, ad"
2549
"dress: %s", fpr, address)
2735
logger.info("Client not found for key ID: %s, address"
2736
": %s", key_id or fpr, address)
2550
2737
if self.use_dbus:
2551
2738
# Emit D-Bus signal
2552
mandos_dbus_service.ClientNotFound(fpr,
2739
mandos_dbus_service.ClientNotFound(key_id or fpr,
2554
2741
parent_pipe.send(False)
2557
2744
GLib.io_add_watch(
2558
parent_pipe.fileno(),
2559
GLib.IO_IN | GLib.IO_HUP,
2745
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2746
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2560
2747
functools.partial(self.handle_ipc,
2561
parent_pipe = parent_pipe,
2563
client_object = client))
2748
parent_pipe=parent_pipe,
2750
client_object=client))
2564
2751
parent_pipe.send(True)
2565
2752
# remove the old hook in favor of the new above hook on
2569
2756
funcname = request[1]
2570
2757
args = request[2]
2571
2758
kwargs = request[3]
2573
2760
parent_pipe.send(('data', getattr(client_object,
2574
2761
funcname)(*args,
2577
2764
if command == 'getattr':
2578
2765
attrname = request[1]
2579
2766
if isinstance(client_object.__getattribute__(attrname),
2580
collections.Callable):
2767
collections.abc.Callable):
2581
2768
parent_pipe.send(('function', ))
2583
2770
parent_pipe.send((
2584
2771
'data', client_object.__getattribute__(attrname)))
2586
2773
if command == 'setattr':
2587
2774
attrname = request[1]
2588
2775
value = request[2]
2589
2776
setattr(client_object, attrname, value)
2594
2781
def rfc3339_duration_to_delta(duration):
2595
2782
"""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)
2784
>>> rfc3339_duration_to_delta("P7D") == datetime.timedelta(7)
2786
>>> rfc3339_duration_to_delta("PT60S") == datetime.timedelta(0, 60)
2788
>>> rfc3339_duration_to_delta("PT60M") == datetime.timedelta(0, 3600)
2790
>>> rfc3339_duration_to_delta("PT24H") == datetime.timedelta(1)
2792
>>> rfc3339_duration_to_delta("P1W") == datetime.timedelta(7)
2794
>>> rfc3339_duration_to_delta("PT5M30S") == datetime.timedelta(0, 330)
2796
>>> rfc3339_duration_to_delta("P1DT3M20S") == datetime.timedelta(1, 200)
2613
2800
# Parsing an RFC 3339 duration with regular expressions is not
2614
2801
# possible - there would have to be multiple places for the same
2615
2802
# values, like seconds. The current code, while more esoteric, is
2616
2803
# cleaner without depending on a parsing library. If Python had a
2617
2804
# built-in library for parsing we would use it, but we'd like to
2618
2805
# avoid excessive use of external libraries.
2620
2807
# New type for defining tokens, syntax, and semantics all-in-one
2621
2808
Token = collections.namedtuple("Token", (
2622
2809
"regexp", # To match token; if "value" is not None, must have
2806
2996
parser.add_argument("--no-zeroconf", action="store_false",
2807
2997
dest="zeroconf", help="Do not use Zeroconf",
2810
3000
options = parser.parse_args()
2814
fail_count, test_count = doctest.testmod()
2815
sys.exit(os.EX_OK if fail_count == 0 else 1)
2817
3002
# 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",
3003
if gnutls.has_rawpk:
3004
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
3005
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
3007
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
3008
":+SIGN-DSA-SHA256")
3009
server_defaults = {"interface": "",
3013
"priority": priority,
3014
"servicename": "Mandos",
3020
"statedir": "/var/lib/mandos",
3021
"foreground": "False",
2836
3026
# Parse config file for server-global settings
2837
server_config = configparser.SafeConfigParser(server_defaults)
3027
server_config = configparser.ConfigParser(server_defaults)
2838
3028
del server_defaults
2839
3029
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2840
# Convert the SafeConfigParser object to a dict
3030
# Convert the ConfigParser object to a dict
2841
3031
server_settings = server_config.defaults()
2842
3032
# Use the appropriate methods on the non-string config options
2843
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
3033
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3034
"foreground", "zeroconf"):
2844
3035
server_settings[option] = server_config.getboolean("DEFAULT",
2846
3037
if server_settings["port"]:
3019
3210
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3020
3211
service = AvahiServiceToSyslog(
3021
name = server_settings["servicename"],
3022
servicetype = "_mandos._tcp",
3023
protocol = protocol,
3212
name=server_settings["servicename"],
3213
servicetype="_mandos._tcp",
3025
3216
if server_settings["interface"]:
3026
3217
service.interface = if_nametoindex(
3027
3218
server_settings["interface"].encode("utf-8"))
3029
3220
global multiprocessing_manager
3030
3221
multiprocessing_manager = multiprocessing.Manager()
3032
3223
client_class = Client
3034
client_class = functools.partial(ClientDBus, bus = bus)
3225
client_class = functools.partial(ClientDBus, bus=bus)
3036
3227
client_settings = Client.config_parser(client_config)
3037
3228
old_client_settings = {}
3038
3229
clients_data = {}
3040
3231
# This is used to redirect stdout and stderr for checker processes
3042
wnull = open(os.devnull, "w") # A writable /dev/null
3233
wnull = open(os.devnull, "w") # A writable /dev/null
3043
3234
# Only used if server is running in foreground but not in debug
3045
3236
if debug or not foreground:
3048
3239
# Get client data and settings from last running state.
3049
3240
if server_settings["restore"]:
3051
3242
with open(stored_state_path, "rb") as stored_state:
3052
if sys.version_info.major == 2:
3243
if sys.version_info.major == 2:
3053
3244
clients_data, old_client_settings = pickle.load(
3056
3247
bytes_clients_data, bytes_old_client_settings = (
3057
pickle.load(stored_state, encoding = "bytes"))
3058
### Fix bytes to strings
3248
pickle.load(stored_state, encoding="bytes"))
3249
# Fix bytes to strings
3061
clients_data = { (key.decode("utf-8")
3062
if isinstance(key, bytes)
3065
bytes_clients_data.items() }
3252
clients_data = {(key.decode("utf-8")
3253
if isinstance(key, bytes)
3256
bytes_clients_data.items()}
3066
3257
del bytes_clients_data
3067
3258
for key in clients_data:
3068
value = { (k.decode("utf-8")
3069
if isinstance(k, bytes) else k): v
3071
clients_data[key].items() }
3259
value = {(k.decode("utf-8")
3260
if isinstance(k, bytes) else k): v
3262
clients_data[key].items()}
3072
3263
clients_data[key] = value
3073
3264
# .client_structure
3074
3265
value["client_structure"] = [
3075
3266
(s.decode("utf-8")
3076
3267
if isinstance(s, bytes)
3077
3268
else s) for s in
3078
value["client_structure"] ]
3080
for k in ("name", "host"):
3269
value["client_structure"]]
3270
# .name, .host, and .checker_command
3271
for k in ("name", "host", "checker_command"):
3081
3272
if isinstance(value[k], bytes):
3082
3273
value[k] = value[k].decode("utf-8")
3083
## old_client_settings
3274
if "key_id" not in value:
3275
value["key_id"] = ""
3276
elif "fingerprint" not in value:
3277
value["fingerprint"] = ""
3278
# old_client_settings
3085
3280
old_client_settings = {
3086
3281
(key.decode("utf-8")
3087
3282
if isinstance(key, bytes)
3088
3283
else key): value
3089
3284
for key, value in
3090
bytes_old_client_settings.items() }
3285
bytes_old_client_settings.items()}
3091
3286
del bytes_old_client_settings
3287
# .host and .checker_command
3093
3288
for value in old_client_settings.values():
3094
if isinstance(value["host"], bytes):
3095
value["host"] = (value["host"]
3289
for attribute in ("host", "checker_command"):
3290
if isinstance(value[attribute], bytes):
3291
value[attribute] = (value[attribute]
3097
3293
os.remove(stored_state_path)
3098
3294
except IOError as e:
3099
3295
if e.errno == errno.ENOENT: