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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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# -*- mode: python; coding: utf-8 -*-
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4
# 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 © 2008-2019 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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# 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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19
# the Free Software Foundation, either version 3 of the License, or
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20
# (at your option) any later version.
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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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# 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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24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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25
# 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 Mandos. If not, see <http://www.gnu.org/licenses/>.
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# along with this program. If not, see
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# <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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# 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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90
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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# 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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SO_BINDTODEVICE = None
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if sys.version_info.major == 2:
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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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107
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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111
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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256
# 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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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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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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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(t):
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def string_array_to_txt_array(self, 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 = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
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ret = AvahiService.rename(self, *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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"""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)
483
class GnuTLS(object):
484
"""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."""
487
_library = ctypes.cdll.LoadLibrary(
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ctypes.util.find_library("gnutls"))
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_need_version = b"3.3.0"
491
# 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))
537
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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
548
508
CRD_CERTIFICATE = 1
549
509
E_NO_CERTIFICATE_FOUND = -49
554
KEYID_USE_SHA256 = 1 # gnutls/x509.h
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OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
558
513
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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518
certificate_credentials_t = ctypes.POINTER(
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519
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)),
570
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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)
577
529
credentials_type_t = ctypes.c_int
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transport_ptr_t = ctypes.c_void_p
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531
close_request_t = ctypes.c_int
582
534
class Error(Exception):
583
def __init__(self, message=None, code=None, args=()):
535
# 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"
538
# global variable has happened.
539
def __init__(self, message = None, code = None, args=()):
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# Default usage is by a message string, but if a return
585
541
# code is passed, convert it to a string with
586
542
# gnutls.strerror()
588
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if message is None and code is not None:
589
message = gnutls.strerror(code)
590
return super(gnutls.Error, self).__init__(
545
message = GnuTLS.strerror(code)
546
return super(GnuTLS.Error, self).__init__(
593
549
class CertificateSecurityError(Error):
553
class Credentials(object):
598
554
def __init__(self):
599
555
self._c_object = gnutls.certificate_credentials_t()
600
556
gnutls.certificate_allocate_credentials(
601
557
ctypes.byref(self._c_object))
602
558
self.type = gnutls.CRD_CERTIFICATE
604
560
def __del__(self):
605
561
gnutls.certificate_free_credentials(self._c_object)
608
def __init__(self, socket, credentials=None):
563
class ClientSession(object):
564
def __init__(self, socket, credentials = None):
609
565
self._c_object = gnutls.session_t()
610
gnutls_flags = gnutls.CLIENT
611
if gnutls.check_version(b"3.5.6"):
612
gnutls_flags |= gnutls.NO_TICKETS
614
gnutls_flags |= gnutls.ENABLE_RAWPK
615
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
566
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
617
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gnutls.set_default_priority(self._c_object)
618
568
gnutls.transport_set_ptr(self._c_object, socket.fileno())
619
569
gnutls.handshake_set_private_extensions(self._c_object,
661
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return _error_code(result)
662
612
result = func(*arguments)
665
615
# 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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619
priority_set_direct = _library.gnutls_priority_set_direct
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priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
671
621
ctypes.POINTER(ctypes.c_char_p)]
672
622
priority_set_direct.restype = _error_code
674
624
init = _library.gnutls_init
675
625
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
676
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init.restype = _error_code
678
628
set_default_priority = _library.gnutls_set_default_priority
679
629
set_default_priority.argtypes = [session_t]
680
630
set_default_priority.restype = _error_code
682
632
record_send = _library.gnutls_record_send
683
633
record_send.argtypes = [session_t, ctypes.c_void_p,
685
635
record_send.restype = ctypes.c_ssize_t
686
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record_send.errcheck = _retry_on_error
688
638
certificate_allocate_credentials = (
689
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_library.gnutls_certificate_allocate_credentials)
690
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certificate_allocate_credentials.argtypes = [
691
641
ctypes.POINTER(certificate_credentials_t)]
692
642
certificate_allocate_credentials.restype = _error_code
694
644
certificate_free_credentials = (
695
645
_library.gnutls_certificate_free_credentials)
696
certificate_free_credentials.argtypes = [
697
certificate_credentials_t]
646
certificate_free_credentials.argtypes = [certificate_credentials_t]
698
647
certificate_free_credentials.restype = None
700
649
handshake_set_private_extensions = (
701
650
_library.gnutls_handshake_set_private_extensions)
702
651
handshake_set_private_extensions.argtypes = [session_t,
704
653
handshake_set_private_extensions.restype = None
706
655
credentials_set = _library.gnutls_credentials_set
707
656
credentials_set.argtypes = [session_t, credentials_type_t,
709
658
credentials_set.restype = _error_code
711
660
strerror = _library.gnutls_strerror
712
661
strerror.argtypes = [ctypes.c_int]
713
662
strerror.restype = ctypes.c_char_p
715
664
certificate_type_get = _library.gnutls_certificate_type_get
716
665
certificate_type_get.argtypes = [session_t]
717
666
certificate_type_get.restype = _error_code
719
668
certificate_get_peers = _library.gnutls_certificate_get_peers
720
669
certificate_get_peers.argtypes = [session_t,
721
670
ctypes.POINTER(ctypes.c_uint)]
722
671
certificate_get_peers.restype = ctypes.POINTER(datum_t)
724
673
global_set_log_level = _library.gnutls_global_set_log_level
725
674
global_set_log_level.argtypes = [ctypes.c_int]
726
675
global_set_log_level.restype = None
728
677
global_set_log_function = _library.gnutls_global_set_log_function
729
678
global_set_log_function.argtypes = [log_func]
730
679
global_set_log_function.restype = None
732
681
deinit = _library.gnutls_deinit
733
682
deinit.argtypes = [session_t]
734
683
deinit.restype = None
736
685
handshake = _library.gnutls_handshake
737
686
handshake.argtypes = [session_t]
738
687
handshake.restype = _error_code
739
688
handshake.errcheck = _retry_on_error
741
690
transport_set_ptr = _library.gnutls_transport_set_ptr
742
691
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
743
692
transport_set_ptr.restype = None
745
694
bye = _library.gnutls_bye
746
695
bye.argtypes = [session_t, close_request_t]
747
696
bye.restype = _error_code
748
697
bye.errcheck = _retry_on_error
750
699
check_version = _library.gnutls_check_version
751
700
check_version.argtypes = [ctypes.c_char_p]
752
701
check_version.restype = ctypes.c_char_p
754
_need_version = b"3.3.0"
755
if check_version(_need_version) is None:
756
raise self.Error("Needs GnuTLS {} or later"
757
.format(_need_version))
759
_tls_rawpk_version = b"3.6.6"
760
has_rawpk = bool(check_version(_tls_rawpk_version))
764
class pubkey_st(ctypes.Structure):
766
pubkey_t = ctypes.POINTER(pubkey_st)
768
x509_crt_fmt_t = ctypes.c_int
770
# All the function declarations below are from gnutls/abstract.h
771
pubkey_init = _library.gnutls_pubkey_init
772
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
773
pubkey_init.restype = _error_code
775
pubkey_import = _library.gnutls_pubkey_import
776
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
778
pubkey_import.restype = _error_code
780
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
781
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
782
ctypes.POINTER(ctypes.c_ubyte),
783
ctypes.POINTER(ctypes.c_size_t)]
784
pubkey_get_key_id.restype = _error_code
786
pubkey_deinit = _library.gnutls_pubkey_deinit
787
pubkey_deinit.argtypes = [pubkey_t]
788
pubkey_deinit.restype = None
790
# All the function declarations below are from gnutls/openpgp.h
792
openpgp_crt_init = _library.gnutls_openpgp_crt_init
793
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
794
openpgp_crt_init.restype = _error_code
796
openpgp_crt_import = _library.gnutls_openpgp_crt_import
797
openpgp_crt_import.argtypes = [openpgp_crt_t,
798
ctypes.POINTER(datum_t),
800
openpgp_crt_import.restype = _error_code
802
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
803
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
804
ctypes.POINTER(ctypes.c_uint)]
805
openpgp_crt_verify_self.restype = _error_code
807
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
808
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
809
openpgp_crt_deinit.restype = None
811
openpgp_crt_get_fingerprint = (
812
_library.gnutls_openpgp_crt_get_fingerprint)
813
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
817
openpgp_crt_get_fingerprint.restype = _error_code
819
if check_version(b"3.6.4"):
820
certificate_type_get2 = _library.gnutls_certificate_type_get2
821
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
822
certificate_type_get2.restype = _error_code
703
# All the function declarations below are from gnutls/openpgp.h
705
openpgp_crt_init = _library.gnutls_openpgp_crt_init
706
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
707
openpgp_crt_init.restype = _error_code
709
openpgp_crt_import = _library.gnutls_openpgp_crt_import
710
openpgp_crt_import.argtypes = [openpgp_crt_t,
711
ctypes.POINTER(datum_t),
713
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,
717
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
824
732
# Remove non-public functions
825
733
del _error_code, _retry_on_error
734
# Create the global "gnutls" object, simulating a module
828
737
def call_pipe(connection, # : multiprocessing.Connection
829
738
func, *args, **kwargs):
830
739
"""This function is meant to be called by multiprocessing.Process
832
741
This function runs func(*args, **kwargs), and writes the resulting
833
742
return value on the provided multiprocessing.Connection.
835
744
connection.send(func(*args, **kwargs))
836
745
connection.close()
747
class Client(object):
840
748
"""A representation of a client host served by this server.
843
751
approved: bool(); 'None' if not yet approved/disapproved
844
752
approval_delay: datetime.timedelta(); Time to wait for approval
845
753
approval_duration: datetime.timedelta(); Duration of one approval
846
checker: multiprocessing.Process(); a running checker process used
847
to see if the client lives. 'None' if no process is
754
checker: subprocess.Popen(); a running checker process used
755
to see if the client lives.
756
'None' if no process is running.
849
757
checker_callback_tag: a GLib event source tag, or None
850
758
checker_command: string; External command which is run to check
851
759
if client lives. %() expansions are done at
1528
1428
exc_info=error)
1529
1429
return xmlstring
1533
1432
dbus.OBJECT_MANAGER_IFACE
1534
1433
except AttributeError:
1535
1434
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1538
1436
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1539
1437
"""A D-Bus object with an ObjectManager.
1541
1439
Classes inheriting from this exposes the standard
1542
1440
GetManagedObjects call and the InterfacesAdded and
1543
1441
InterfacesRemoved signals on the standard
1544
1442
"org.freedesktop.DBus.ObjectManager" interface.
1546
1444
Note: No signals are sent automatically; they must be sent
1549
1447
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1550
out_signature="a{oa{sa{sv}}}")
1448
out_signature = "a{oa{sa{sv}}}")
1551
1449
def GetManagedObjects(self):
1552
1450
"""This function must be overridden"""
1553
1451
raise NotImplementedError()
1555
1453
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1556
signature="oa{sa{sv}}")
1454
signature = "oa{sa{sv}}")
1557
1455
def InterfacesAdded(self, object_path, interfaces_and_properties):
1560
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1458
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1561
1459
def InterfacesRemoved(self, object_path, interfaces):
1564
1462
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1566
path_keyword='object_path',
1567
connection_keyword='connection')
1463
out_signature = "s",
1464
path_keyword = 'object_path',
1465
connection_keyword = 'connection')
1568
1466
def Introspect(self, object_path, connection):
1569
1467
"""Overloading of standard D-Bus method.
1571
1469
Override return argument name of GetManagedObjects to be
1572
1470
"objpath_interfaces_and_properties"
2264
2152
class ClientHandler(socketserver.BaseRequestHandler, object):
2265
2153
"""A class to handle client connections.
2267
2155
Instantiated once for each connection to handle it.
2268
2156
Note: This will run in its own forked process."""
2270
2158
def handle(self):
2271
2159
with contextlib.closing(self.server.child_pipe) as child_pipe:
2272
2160
logger.info("TCP connection from: %s",
2273
2161
str(self.client_address))
2274
2162
logger.debug("Pipe FD: %d",
2275
2163
self.server.child_pipe.fileno())
2277
2165
session = gnutls.ClientSession(self.request)
2279
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2280
# "+AES-256-CBC", "+SHA1",
2281
# "+COMP-NULL", "+CTYPE-OPENPGP",
2167
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
2168
# "+AES-256-CBC", "+SHA1",
2169
# "+COMP-NULL", "+CTYPE-OPENPGP",
2283
2171
# Use a fallback default, since this MUST be set.
2284
2172
priority = self.server.gnutls_priority
2285
2173
if priority is None:
2286
2174
priority = "NORMAL"
2287
gnutls.priority_set_direct(session._c_object,
2288
priority.encode("utf-8"),
2175
gnutls.priority_set_direct(session._c_object, priority,
2291
2178
# Start communication using the Mandos protocol
2292
2179
# Get protocol number
2293
2180
line = self.request.makefile().readline()
2515
class MultiprocessingMixIn:
2345
class MultiprocessingMixIn(object):
2516
2346
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2518
2348
def sub_process_main(self, request, address):
2520
2350
self.finish_request(request, address)
2521
2351
except Exception:
2522
2352
self.handle_error(request, address)
2523
2353
self.close_request(request)
2525
2355
def process_request(self, request, address):
2526
2356
"""Start a new process to process the request."""
2527
proc = multiprocessing.Process(target=self.sub_process_main,
2528
args=(request, address))
2357
proc = multiprocessing.Process(target = self.sub_process_main,
2358
args = (request, address))
2533
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
2363
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2534
2364
""" adds a pipe to the MixIn """
2536
2366
def process_request(self, request, client_address):
2537
2367
"""Overrides and wraps the original process_request().
2539
2369
This function creates a new pipe in self.pipe
2541
2371
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2543
2373
proc = MultiprocessingMixIn.process_request(self, request,
2544
2374
client_address)
2545
2375
self.child_pipe.close()
2546
2376
self.add_pipe(parent_pipe, proc)
2548
2378
def add_pipe(self, parent_pipe, proc):
2549
2379
"""Dummy function; override as necessary"""
2550
2380
raise NotImplementedError()
2553
2383
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2554
socketserver.TCPServer):
2384
socketserver.TCPServer, object):
2555
2385
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2558
2388
enabled: Boolean; whether this server is activated yet
2559
2389
interface: None or a network interface name (string)
2560
2390
use_ipv6: Boolean; to use IPv6 or not
2563
2393
def __init__(self, server_address, RequestHandlerClass,
2564
2394
interface=None,
2599
2428
# socket_wrapper(), if socketfd was set.
2600
2429
socketserver.TCPServer.__init__(self, server_address,
2601
2430
RequestHandlerClass)
2603
2432
def server_bind(self):
2604
2433
"""This overrides the normal server_bind() function
2605
2434
to bind to an interface if one was specified, and also NOT to
2606
2435
bind to an address or port if they were not specified."""
2607
global SO_BINDTODEVICE
2608
2436
if self.interface is not None:
2609
2437
if SO_BINDTODEVICE is None:
2610
# Fall back to a hard-coded value which seems to be
2612
logger.warning("SO_BINDTODEVICE not found, trying 25")
2613
SO_BINDTODEVICE = 25
2615
self.socket.setsockopt(
2616
socket.SOL_SOCKET, SO_BINDTODEVICE,
2617
(self.interface + "\0").encode("utf-8"))
2618
except socket.error as error:
2619
if error.errno == errno.EPERM:
2620
logger.error("No permission to bind to"
2621
" interface %s", self.interface)
2622
elif error.errno == errno.ENOPROTOOPT:
2623
logger.error("SO_BINDTODEVICE not available;"
2624
" cannot bind to interface %s",
2626
elif error.errno == errno.ENODEV:
2627
logger.error("Interface %s does not exist,"
2628
" cannot bind", self.interface)
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)
2631
2459
# Only bind(2) the socket if we really need to.
2632
2460
if self.server_address[0] or self.server_address[1]:
2633
if self.server_address[1]:
2634
self.allow_reuse_address = True
2635
2461
if not self.server_address[0]:
2636
2462
if self.address_family == socket.AF_INET6:
2637
any_address = "::" # in6addr_any
2463
any_address = "::" # in6addr_any
2639
any_address = "0.0.0.0" # INADDR_ANY
2465
any_address = "0.0.0.0" # INADDR_ANY
2640
2466
self.server_address = (any_address,
2641
2467
self.server_address[1])
2642
2468
elif not self.server_address[1]:
2676
2502
self.gnutls_priority = gnutls_priority
2677
2503
IPv6_TCPServer.__init__(self, server_address,
2678
2504
RequestHandlerClass,
2679
interface=interface,
2505
interface = interface,
2506
use_ipv6 = use_ipv6,
2507
socketfd = socketfd)
2683
2509
def server_activate(self):
2684
2510
if self.enabled:
2685
2511
return socketserver.TCPServer.server_activate(self)
2687
2513
def enable(self):
2688
2514
self.enabled = True
2690
2516
def add_pipe(self, parent_pipe, proc):
2691
2517
# Call "handle_ipc" for both data and EOF events
2692
2518
GLib.io_add_watch(
2693
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2694
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2519
parent_pipe.fileno(),
2520
GLib.IO_IN | GLib.IO_HUP,
2695
2521
functools.partial(self.handle_ipc,
2696
parent_pipe=parent_pipe,
2522
parent_pipe = parent_pipe,
2699
2525
def handle_ipc(self, source, condition,
2700
2526
parent_pipe=None,
2702
2528
client_object=None):
2703
2529
# error, or the other end of multiprocessing.Pipe has closed
2704
2530
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2705
2531
# Wait for other process to exit
2709
2535
# Read a request from the child
2710
2536
request = parent_pipe.recv()
2711
2537
command = request[0]
2713
2539
if command == 'init':
2714
key_id = request[1].decode("ascii")
2715
fpr = request[2].decode("ascii")
2716
address = request[3]
2541
address = request[2]
2718
2543
for c in self.clients.values():
2719
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2721
if key_id and c.key_id == key_id:
2724
if fpr and c.fingerprint == fpr:
2544
if c.fingerprint == fpr:
2728
logger.info("Client not found for key ID: %s, address"
2729
": %s", key_id or fpr, address)
2548
logger.info("Client not found for fingerprint: %s, ad"
2549
"dress: %s", fpr, address)
2730
2550
if self.use_dbus:
2731
2551
# Emit D-Bus signal
2732
mandos_dbus_service.ClientNotFound(key_id or fpr,
2552
mandos_dbus_service.ClientNotFound(fpr,
2734
2554
parent_pipe.send(False)
2737
2557
GLib.io_add_watch(
2738
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2739
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2558
parent_pipe.fileno(),
2559
GLib.IO_IN | GLib.IO_HUP,
2740
2560
functools.partial(self.handle_ipc,
2741
parent_pipe=parent_pipe,
2743
client_object=client))
2561
parent_pipe = parent_pipe,
2563
client_object = client))
2744
2564
parent_pipe.send(True)
2745
2565
# remove the old hook in favor of the new above hook on
2749
2569
funcname = request[1]
2750
2570
args = request[2]
2751
2571
kwargs = request[3]
2753
2573
parent_pipe.send(('data', getattr(client_object,
2754
2574
funcname)(*args,
2757
2577
if command == 'getattr':
2758
2578
attrname = request[1]
2759
2579
if isinstance(client_object.__getattribute__(attrname),
2760
collections.abc.Callable):
2580
collections.Callable):
2761
2581
parent_pipe.send(('function', ))
2763
2583
parent_pipe.send((
2764
2584
'data', client_object.__getattribute__(attrname)))
2766
2586
if command == 'setattr':
2767
2587
attrname = request[1]
2768
2588
value = request[2]
2769
2589
setattr(client_object, attrname, value)
2774
2594
def rfc3339_duration_to_delta(duration):
2775
2595
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2777
>>> rfc3339_duration_to_delta("P7D") == datetime.timedelta(7)
2779
>>> rfc3339_duration_to_delta("PT60S") == datetime.timedelta(0, 60)
2781
>>> rfc3339_duration_to_delta("PT60M") == datetime.timedelta(0, 3600)
2783
>>> rfc3339_duration_to_delta("PT24H") == datetime.timedelta(1)
2785
>>> rfc3339_duration_to_delta("P1W") == datetime.timedelta(7)
2787
>>> rfc3339_duration_to_delta("PT5M30S") == datetime.timedelta(0, 330)
2789
>>> rfc3339_duration_to_delta("P1DT3M20S") == datetime.timedelta(1, 200)
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)
2793
2613
# Parsing an RFC 3339 duration with regular expressions is not
2794
2614
# possible - there would have to be multiple places for the same
2795
2615
# values, like seconds. The current code, while more esoteric, is
2796
2616
# cleaner without depending on a parsing library. If Python had a
2797
2617
# built-in library for parsing we would use it, but we'd like to
2798
2618
# avoid excessive use of external libraries.
2800
2620
# New type for defining tokens, syntax, and semantics all-in-one
2801
2621
Token = collections.namedtuple("Token", (
2802
2622
"regexp", # To match token; if "value" is not None, must have
2989
2806
parser.add_argument("--no-zeroconf", action="store_false",
2990
2807
dest="zeroconf", help="Do not use Zeroconf",
2993
2810
options = parser.parse_args()
2814
fail_count, test_count = doctest.testmod()
2815
sys.exit(os.EX_OK if fail_count == 0 else 1)
2995
2817
# Default values for config file for server-global settings
2996
if gnutls.has_rawpk:
2997
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2998
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
3000
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
3001
":+SIGN-DSA-SHA256")
3002
server_defaults = {"interface": "",
3006
"priority": priority,
3007
"servicename": "Mandos",
3013
"statedir": "/var/lib/mandos",
3014
"foreground": "False",
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",
3019
2836
# Parse config file for server-global settings
3020
server_config = configparser.ConfigParser(server_defaults)
2837
server_config = configparser.SafeConfigParser(server_defaults)
3021
2838
del server_defaults
3022
2839
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3023
# Convert the ConfigParser object to a dict
2840
# Convert the SafeConfigParser object to a dict
3024
2841
server_settings = server_config.defaults()
3025
2842
# Use the appropriate methods on the non-string config options
3026
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3027
"foreground", "zeroconf"):
2843
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
3028
2844
server_settings[option] = server_config.getboolean("DEFAULT",
3030
2846
if server_settings["port"]:
3203
3019
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3204
3020
service = AvahiServiceToSyslog(
3205
name=server_settings["servicename"],
3206
servicetype="_mandos._tcp",
3021
name = server_settings["servicename"],
3022
servicetype = "_mandos._tcp",
3023
protocol = protocol,
3209
3025
if server_settings["interface"]:
3210
3026
service.interface = if_nametoindex(
3211
3027
server_settings["interface"].encode("utf-8"))
3213
3029
global multiprocessing_manager
3214
3030
multiprocessing_manager = multiprocessing.Manager()
3216
3032
client_class = Client
3218
client_class = functools.partial(ClientDBus, bus=bus)
3034
client_class = functools.partial(ClientDBus, bus = bus)
3220
3036
client_settings = Client.config_parser(client_config)
3221
3037
old_client_settings = {}
3222
3038
clients_data = {}
3224
3040
# This is used to redirect stdout and stderr for checker processes
3226
wnull = open(os.devnull, "w") # A writable /dev/null
3042
wnull = open(os.devnull, "w") # A writable /dev/null
3227
3043
# Only used if server is running in foreground but not in debug
3229
3045
if debug or not foreground:
3232
3048
# Get client data and settings from last running state.
3233
3049
if server_settings["restore"]:
3235
3051
with open(stored_state_path, "rb") as stored_state:
3236
if sys.version_info.major == 2:
3052
if sys.version_info.major == 2:
3237
3053
clients_data, old_client_settings = pickle.load(
3240
3056
bytes_clients_data, bytes_old_client_settings = (
3241
pickle.load(stored_state, encoding="bytes"))
3242
# Fix bytes to strings
3057
pickle.load(stored_state, encoding = "bytes"))
3058
### Fix bytes to strings
3245
clients_data = {(key.decode("utf-8")
3246
if isinstance(key, bytes)
3249
bytes_clients_data.items()}
3061
clients_data = { (key.decode("utf-8")
3062
if isinstance(key, bytes)
3065
bytes_clients_data.items() }
3250
3066
del bytes_clients_data
3251
3067
for key in clients_data:
3252
value = {(k.decode("utf-8")
3253
if isinstance(k, bytes) else k): v
3255
clients_data[key].items()}
3068
value = { (k.decode("utf-8")
3069
if isinstance(k, bytes) else k): v
3071
clients_data[key].items() }
3256
3072
clients_data[key] = value
3257
3073
# .client_structure
3258
3074
value["client_structure"] = [
3259
3075
(s.decode("utf-8")
3260
3076
if isinstance(s, bytes)
3261
3077
else s) for s in
3262
value["client_structure"]]
3263
# .name, .host, and .checker_command
3264
for k in ("name", "host", "checker_command"):
3078
value["client_structure"] ]
3080
for k in ("name", "host"):
3265
3081
if isinstance(value[k], bytes):
3266
3082
value[k] = value[k].decode("utf-8")
3267
if "key_id" not in value:
3268
value["key_id"] = ""
3269
elif "fingerprint" not in value:
3270
value["fingerprint"] = ""
3271
# old_client_settings
3083
## old_client_settings
3273
3085
old_client_settings = {
3274
3086
(key.decode("utf-8")
3275
3087
if isinstance(key, bytes)
3276
3088
else key): value
3277
3089
for key, value in
3278
bytes_old_client_settings.items()}
3090
bytes_old_client_settings.items() }
3279
3091
del bytes_old_client_settings
3280
# .host and .checker_command
3281
3093
for value in old_client_settings.values():
3282
for attribute in ("host", "checker_command"):
3283
if isinstance(value[attribute], bytes):
3284
value[attribute] = (value[attribute]
3094
if isinstance(value["host"], bytes):
3095
value["host"] = (value["host"]
3286
3097
os.remove(stored_state_path)
3287
3098
except IOError as e:
3288
3099
if e.errno == errno.ENOENT:
3388
3199
pidfilename, pid)
3390
3201
del pidfilename
3392
for termsig in (signal.SIGHUP, signal.SIGTERM):
3393
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3394
lambda: main_loop.quit() and False)
3203
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
3204
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3398
3208
@alternate_dbus_interfaces(
3399
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3209
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
3400
3210
class MandosDBusService(DBusObjectWithObjectManager):
3401
3211
"""A D-Bus proxy object"""
3403
3213
def __init__(self):
3404
3214
dbus.service.Object.__init__(self, bus, "/")
3406
3216
_interface = "se.recompile.Mandos"
3408
3218
@dbus.service.signal(_interface, signature="o")
3409
3219
def ClientAdded(self, objpath):
3413
3223
@dbus.service.signal(_interface, signature="ss")
3414
def ClientNotFound(self, key_id, address):
3224
def ClientNotFound(self, fingerprint, address):
3418
3228
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3420
3230
@dbus.service.signal(_interface, signature="os")
3421
3231
def ClientRemoved(self, objpath, name):
3425
3235
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3427
3237
@dbus.service.method(_interface, out_signature="ao")