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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
683
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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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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
707
openpgp_crt_init = _library.gnutls_openpgp_crt_init
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openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
709
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
717
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
718
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
719
ctypes.POINTER(ctypes.c_uint)]
720
openpgp_crt_verify_self.restype = _error_code
722
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
723
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
724
openpgp_crt_deinit.restype = None
726
openpgp_crt_get_fingerprint = (
727
_library.gnutls_openpgp_crt_get_fingerprint)
728
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
732
openpgp_crt_get_fingerprint.restype = _error_code
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
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# 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),
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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
734
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# Remove non-public functions
735
832
del _error_code, _retry_on_error
736
# Create the global "gnutls" object, simulating a module
739
835
def call_pipe(connection, # : multiprocessing.Connection
740
836
func, *args, **kwargs):
741
837
"""This function is meant to be called by multiprocessing.Process
743
839
This function runs func(*args, **kwargs), and writes the resulting
744
840
return value on the provided multiprocessing.Connection.
746
842
connection.send(func(*args, **kwargs))
747
843
connection.close()
749
class Client(object):
750
847
"""A representation of a client host served by this server.
753
850
approved: bool(); 'None' if not yet approved/disapproved
754
851
approval_delay: datetime.timedelta(); Time to wait for approval
755
852
approval_duration: datetime.timedelta(); Duration of one approval
756
checker: subprocess.Popen(); a running checker process used
757
to see if the client lives.
758
'None' if no process is running.
853
checker: multiprocessing.Process(); a running checker process used
854
to see if the client lives. 'None' if no process is
759
856
checker_callback_tag: a GLib event source tag, or None
760
857
checker_command: string; External command which is run to check
761
858
if client lives. %() expansions are done at
1430
1535
exc_info=error)
1431
1536
return xmlstring
1434
1540
dbus.OBJECT_MANAGER_IFACE
1435
1541
except AttributeError:
1436
1542
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1438
1545
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1439
1546
"""A D-Bus object with an ObjectManager.
1441
1548
Classes inheriting from this exposes the standard
1442
1549
GetManagedObjects call and the InterfacesAdded and
1443
1550
InterfacesRemoved signals on the standard
1444
1551
"org.freedesktop.DBus.ObjectManager" interface.
1446
1553
Note: No signals are sent automatically; they must be sent
1449
1556
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1450
out_signature = "a{oa{sa{sv}}}")
1557
out_signature="a{oa{sa{sv}}}")
1451
1558
def GetManagedObjects(self):
1452
1559
"""This function must be overridden"""
1453
1560
raise NotImplementedError()
1455
1562
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1456
signature = "oa{sa{sv}}")
1563
signature="oa{sa{sv}}")
1457
1564
def InterfacesAdded(self, object_path, interfaces_and_properties):
1460
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1567
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1461
1568
def InterfacesRemoved(self, object_path, interfaces):
1464
1571
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1465
out_signature = "s",
1466
path_keyword = 'object_path',
1467
connection_keyword = 'connection')
1573
path_keyword='object_path',
1574
connection_keyword='connection')
1468
1575
def Introspect(self, object_path, connection):
1469
1576
"""Overloading of standard D-Bus method.
1471
1578
Override return argument name of GetManagedObjects to be
1472
1579
"objpath_interfaces_and_properties"
2154
2271
class ClientHandler(socketserver.BaseRequestHandler, object):
2155
2272
"""A class to handle client connections.
2157
2274
Instantiated once for each connection to handle it.
2158
2275
Note: This will run in its own forked process."""
2160
2277
def handle(self):
2161
2278
with contextlib.closing(self.server.child_pipe) as child_pipe:
2162
2279
logger.info("TCP connection from: %s",
2163
2280
str(self.client_address))
2164
2281
logger.debug("Pipe FD: %d",
2165
2282
self.server.child_pipe.fileno())
2167
2284
session = gnutls.ClientSession(self.request)
2169
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
2170
# "+AES-256-CBC", "+SHA1",
2171
# "+COMP-NULL", "+CTYPE-OPENPGP",
2286
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2287
# "+AES-256-CBC", "+SHA1",
2288
# "+COMP-NULL", "+CTYPE-OPENPGP",
2173
2290
# Use a fallback default, since this MUST be set.
2174
2291
priority = self.server.gnutls_priority
2175
2292
if priority is None:
2176
2293
priority = "NORMAL"
2177
gnutls.priority_set_direct(session._c_object, priority,
2294
gnutls.priority_set_direct(session._c_object,
2295
priority.encode("utf-8"),
2180
2298
# Start communication using the Mandos protocol
2181
2299
# Get protocol number
2182
2300
line = self.request.makefile().readline()
2347
class MultiprocessingMixIn(object):
2522
class MultiprocessingMixIn:
2348
2523
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2350
2525
def sub_process_main(self, request, address):
2352
2527
self.finish_request(request, address)
2353
2528
except Exception:
2354
2529
self.handle_error(request, address)
2355
2530
self.close_request(request)
2357
2532
def process_request(self, request, address):
2358
2533
"""Start a new process to process the request."""
2359
proc = multiprocessing.Process(target = self.sub_process_main,
2360
args = (request, address))
2534
proc = multiprocessing.Process(target=self.sub_process_main,
2535
args=(request, address))
2365
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2540
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
2366
2541
""" adds a pipe to the MixIn """
2368
2543
def process_request(self, request, client_address):
2369
2544
"""Overrides and wraps the original process_request().
2371
2546
This function creates a new pipe in self.pipe
2373
2548
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2375
2550
proc = MultiprocessingMixIn.process_request(self, request,
2376
2551
client_address)
2377
2552
self.child_pipe.close()
2378
2553
self.add_pipe(parent_pipe, proc)
2380
2555
def add_pipe(self, parent_pipe, proc):
2381
2556
"""Dummy function; override as necessary"""
2382
2557
raise NotImplementedError()
2385
2560
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2386
socketserver.TCPServer, object):
2561
socketserver.TCPServer):
2387
2562
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2390
2565
enabled: Boolean; whether this server is activated yet
2391
2566
interface: None or a network interface name (string)
2392
2567
use_ipv6: Boolean; to use IPv6 or not
2395
2570
def __init__(self, server_address, RequestHandlerClass,
2396
2571
interface=None,
2430
2606
# socket_wrapper(), if socketfd was set.
2431
2607
socketserver.TCPServer.__init__(self, server_address,
2432
2608
RequestHandlerClass)
2434
2610
def server_bind(self):
2435
2611
"""This overrides the normal server_bind() function
2436
2612
to bind to an interface if one was specified, and also NOT to
2437
2613
bind to an address or port if they were not specified."""
2614
global SO_BINDTODEVICE
2438
2615
if self.interface is not None:
2439
2616
if SO_BINDTODEVICE is None:
2440
logger.error("SO_BINDTODEVICE does not exist;"
2441
" cannot bind to interface %s",
2445
self.socket.setsockopt(
2446
socket.SOL_SOCKET, SO_BINDTODEVICE,
2447
(self.interface + "\0").encode("utf-8"))
2448
except socket.error as error:
2449
if error.errno == errno.EPERM:
2450
logger.error("No permission to bind to"
2451
" interface %s", self.interface)
2452
elif error.errno == errno.ENOPROTOOPT:
2453
logger.error("SO_BINDTODEVICE not available;"
2454
" cannot bind to interface %s",
2456
elif error.errno == errno.ENODEV:
2457
logger.error("Interface %s does not exist,"
2458
" cannot bind", self.interface)
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)
2461
2638
# Only bind(2) the socket if we really need to.
2462
2639
if self.server_address[0] or self.server_address[1]:
2640
if self.server_address[1]:
2641
self.allow_reuse_address = True
2463
2642
if not self.server_address[0]:
2464
2643
if self.address_family == socket.AF_INET6:
2465
any_address = "::" # in6addr_any
2644
any_address = "::" # in6addr_any
2467
any_address = "0.0.0.0" # INADDR_ANY
2646
any_address = "0.0.0.0" # INADDR_ANY
2468
2647
self.server_address = (any_address,
2469
2648
self.server_address[1])
2470
2649
elif not self.server_address[1]:
2504
2683
self.gnutls_priority = gnutls_priority
2505
2684
IPv6_TCPServer.__init__(self, server_address,
2506
2685
RequestHandlerClass,
2507
interface = interface,
2508
use_ipv6 = use_ipv6,
2509
socketfd = socketfd)
2686
interface=interface,
2511
2690
def server_activate(self):
2512
2691
if self.enabled:
2513
2692
return socketserver.TCPServer.server_activate(self)
2515
2694
def enable(self):
2516
2695
self.enabled = True
2518
2697
def add_pipe(self, parent_pipe, proc):
2519
2698
# Call "handle_ipc" for both data and EOF events
2520
2699
GLib.io_add_watch(
2521
parent_pipe.fileno(),
2522
GLib.IO_IN | GLib.IO_HUP,
2700
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2701
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2523
2702
functools.partial(self.handle_ipc,
2524
parent_pipe = parent_pipe,
2703
parent_pipe=parent_pipe,
2527
2706
def handle_ipc(self, source, condition,
2528
2707
parent_pipe=None,
2530
2709
client_object=None):
2531
2710
# error, or the other end of multiprocessing.Pipe has closed
2532
2711
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2533
2712
# Wait for other process to exit
2537
2716
# Read a request from the child
2538
2717
request = parent_pipe.recv()
2539
2718
command = request[0]
2541
2720
if command == 'init':
2543
address = request[2]
2721
key_id = request[1].decode("ascii")
2722
fpr = request[2].decode("ascii")
2723
address = request[3]
2545
2725
for c in self.clients.values():
2546
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:
2550
logger.info("Client not found for fingerprint: %s, ad"
2551
"dress: %s", fpr, address)
2735
logger.info("Client not found for key ID: %s, address"
2736
": %s", key_id or fpr, address)
2552
2737
if self.use_dbus:
2553
2738
# Emit D-Bus signal
2554
mandos_dbus_service.ClientNotFound(fpr,
2739
mandos_dbus_service.ClientNotFound(key_id or fpr,
2556
2741
parent_pipe.send(False)
2559
2744
GLib.io_add_watch(
2560
parent_pipe.fileno(),
2561
GLib.IO_IN | GLib.IO_HUP,
2745
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2746
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2562
2747
functools.partial(self.handle_ipc,
2563
parent_pipe = parent_pipe,
2565
client_object = client))
2748
parent_pipe=parent_pipe,
2750
client_object=client))
2566
2751
parent_pipe.send(True)
2567
2752
# remove the old hook in favor of the new above hook on
2571
2756
funcname = request[1]
2572
2757
args = request[2]
2573
2758
kwargs = request[3]
2575
2760
parent_pipe.send(('data', getattr(client_object,
2576
2761
funcname)(*args,
2579
2764
if command == 'getattr':
2580
2765
attrname = request[1]
2581
2766
if isinstance(client_object.__getattribute__(attrname),
2582
collections.Callable):
2767
collections.abc.Callable):
2583
2768
parent_pipe.send(('function', ))
2585
2770
parent_pipe.send((
2586
2771
'data', client_object.__getattribute__(attrname)))
2588
2773
if command == 'setattr':
2589
2774
attrname = request[1]
2590
2775
value = request[2]
2591
2776
setattr(client_object, attrname, value)
2596
2781
def rfc3339_duration_to_delta(duration):
2597
2782
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2599
>>> rfc3339_duration_to_delta("P7D")
2600
datetime.timedelta(7)
2601
>>> rfc3339_duration_to_delta("PT60S")
2602
datetime.timedelta(0, 60)
2603
>>> rfc3339_duration_to_delta("PT60M")
2604
datetime.timedelta(0, 3600)
2605
>>> rfc3339_duration_to_delta("PT24H")
2606
datetime.timedelta(1)
2607
>>> rfc3339_duration_to_delta("P1W")
2608
datetime.timedelta(7)
2609
>>> rfc3339_duration_to_delta("PT5M30S")
2610
datetime.timedelta(0, 330)
2611
>>> rfc3339_duration_to_delta("P1DT3M20S")
2612
datetime.timedelta(1, 200)
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)
2615
2800
# Parsing an RFC 3339 duration with regular expressions is not
2616
2801
# possible - there would have to be multiple places for the same
2617
2802
# values, like seconds. The current code, while more esoteric, is
2618
2803
# cleaner without depending on a parsing library. If Python had a
2619
2804
# built-in library for parsing we would use it, but we'd like to
2620
2805
# avoid excessive use of external libraries.
2622
2807
# New type for defining tokens, syntax, and semantics all-in-one
2623
2808
Token = collections.namedtuple("Token", (
2624
2809
"regexp", # To match token; if "value" is not None, must have
2808
2996
parser.add_argument("--no-zeroconf", action="store_false",
2809
2997
dest="zeroconf", help="Do not use Zeroconf",
2812
3000
options = parser.parse_args()
2816
fail_count, test_count = doctest.testmod()
2817
sys.exit(os.EX_OK if fail_count == 0 else 1)
2819
3002
# Default values for config file for server-global settings
2820
server_defaults = { "interface": "",
2825
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2826
":+SIGN-DSA-SHA256",
2827
"servicename": "Mandos",
2833
"statedir": "/var/lib/mandos",
2834
"foreground": "False",
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",
2838
3026
# Parse config file for server-global settings
2839
server_config = configparser.SafeConfigParser(server_defaults)
3027
server_config = configparser.ConfigParser(server_defaults)
2840
3028
del server_defaults
2841
3029
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2842
# Convert the SafeConfigParser object to a dict
3030
# Convert the ConfigParser object to a dict
2843
3031
server_settings = server_config.defaults()
2844
3032
# Use the appropriate methods on the non-string config options
2845
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
3033
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3034
"foreground", "zeroconf"):
2846
3035
server_settings[option] = server_config.getboolean("DEFAULT",
2848
3037
if server_settings["port"]:
3021
3210
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3022
3211
service = AvahiServiceToSyslog(
3023
name = server_settings["servicename"],
3024
servicetype = "_mandos._tcp",
3025
protocol = protocol,
3212
name=server_settings["servicename"],
3213
servicetype="_mandos._tcp",
3027
3216
if server_settings["interface"]:
3028
3217
service.interface = if_nametoindex(
3029
3218
server_settings["interface"].encode("utf-8"))
3031
3220
global multiprocessing_manager
3032
3221
multiprocessing_manager = multiprocessing.Manager()
3034
3223
client_class = Client
3036
client_class = functools.partial(ClientDBus, bus = bus)
3225
client_class = functools.partial(ClientDBus, bus=bus)
3038
3227
client_settings = Client.config_parser(client_config)
3039
3228
old_client_settings = {}
3040
3229
clients_data = {}
3042
3231
# This is used to redirect stdout and stderr for checker processes
3044
wnull = open(os.devnull, "w") # A writable /dev/null
3233
wnull = open(os.devnull, "w") # A writable /dev/null
3045
3234
# Only used if server is running in foreground but not in debug
3047
3236
if debug or not foreground:
3050
3239
# Get client data and settings from last running state.
3051
3240
if server_settings["restore"]:
3053
3242
with open(stored_state_path, "rb") as stored_state:
3054
if sys.version_info.major == 2:
3243
if sys.version_info.major == 2:
3055
3244
clients_data, old_client_settings = pickle.load(
3058
3247
bytes_clients_data, bytes_old_client_settings = (
3059
pickle.load(stored_state, encoding = "bytes"))
3060
### Fix bytes to strings
3248
pickle.load(stored_state, encoding="bytes"))
3249
# Fix bytes to strings
3063
clients_data = { (key.decode("utf-8")
3064
if isinstance(key, bytes)
3067
bytes_clients_data.items() }
3252
clients_data = {(key.decode("utf-8")
3253
if isinstance(key, bytes)
3256
bytes_clients_data.items()}
3068
3257
del bytes_clients_data
3069
3258
for key in clients_data:
3070
value = { (k.decode("utf-8")
3071
if isinstance(k, bytes) else k): v
3073
clients_data[key].items() }
3259
value = {(k.decode("utf-8")
3260
if isinstance(k, bytes) else k): v
3262
clients_data[key].items()}
3074
3263
clients_data[key] = value
3075
3264
# .client_structure
3076
3265
value["client_structure"] = [
3077
3266
(s.decode("utf-8")
3078
3267
if isinstance(s, bytes)
3079
3268
else s) for s in
3080
value["client_structure"] ]
3082
for k in ("name", "host"):
3269
value["client_structure"]]
3270
# .name, .host, and .checker_command
3271
for k in ("name", "host", "checker_command"):
3083
3272
if isinstance(value[k], bytes):
3084
3273
value[k] = value[k].decode("utf-8")
3085
## 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
3087
3280
old_client_settings = {
3088
3281
(key.decode("utf-8")
3089
3282
if isinstance(key, bytes)
3090
3283
else key): value
3091
3284
for key, value in
3092
bytes_old_client_settings.items() }
3285
bytes_old_client_settings.items()}
3093
3286
del bytes_old_client_settings
3287
# .host and .checker_command
3095
3288
for value in old_client_settings.values():
3096
if isinstance(value["host"], bytes):
3097
value["host"] = (value["host"]
3289
for attribute in ("host", "checker_command"):
3290
if isinstance(value[attribute], bytes):
3291
value[attribute] = (value[attribute]
3099
3293
os.remove(stored_state_path)
3100
3294
except IOError as e:
3101
3295
if e.errno == errno.ENOENT: