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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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# 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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# 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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SO_BINDTODEVICE = None
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if sys.version_info.major == 2:
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if sys.version_info < (3, 2):
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configparser.Configparser = configparser.SafeConfigParser
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stored_state_file = "clients.pickle"
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logger = logging.getLogger()
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logging.captureWarnings(True) # Show warnings via the logging system
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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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# 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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264
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")
526
_library = ctypes.cdll.LoadLibrary(library)
483
class GnuTLS(object):
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"""This isn't so much a class as it is a module-like namespace.
485
It is instantiated once, and simulates having a GnuTLS module."""
487
_library = ctypes.cdll.LoadLibrary(
488
ctypes.util.find_library("gnutls"))
489
_need_version = b"3.3.0"
491
# Need to use class name "GnuTLS" here, since this method is
492
# 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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# Unless otherwise indicated, the constants and types below are
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# all from the gnutls/gnutls.h C header file.
534
503
E_INTERRUPTED = -52
540
508
CRD_CERTIFICATE = 1
541
509
E_NO_CERTIFICATE_FOUND = -49
546
KEYID_USE_SHA256 = 1 # gnutls/x509.h
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510
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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516
class certificate_credentials_st(ctypes.Structure):
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518
certificate_credentials_t = ctypes.POINTER(
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519
certificate_credentials_st)
558
520
certificate_type_t = ctypes.c_int
560
521
class datum_t(ctypes.Structure):
561
522
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
562
523
('size', ctypes.c_uint)]
564
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class openpgp_crt_int(ctypes.Structure):
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openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
567
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
527
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
571
531
close_request_t = ctypes.c_int
574
534
class Error(Exception):
575
def __init__(self, message=None, code=None, args=()):
535
# We need to use the class name "GnuTLS" here, since this
536
# exception might be raised from within GnuTLS.__init__,
537
# 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
577
541
# code is passed, convert it to a string with
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# gnutls.strerror()
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544
if message is None and code is not None:
581
message = gnutls.strerror(code)
582
return super(gnutls.Error, self).__init__(
545
message = GnuTLS.strerror(code)
546
return super(GnuTLS.Error, self).__init__(
585
549
class CertificateSecurityError(Error):
553
class Credentials(object):
590
554
def __init__(self):
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555
self._c_object = gnutls.certificate_credentials_t()
592
556
gnutls.certificate_allocate_credentials(
593
557
ctypes.byref(self._c_object))
594
558
self.type = gnutls.CRD_CERTIFICATE
596
560
def __del__(self):
597
561
gnutls.certificate_free_credentials(self._c_object)
600
def __init__(self, socket, credentials=None):
563
class ClientSession(object):
564
def __init__(self, socket, credentials = None):
601
565
self._c_object = gnutls.session_t()
602
gnutls_flags = gnutls.CLIENT
603
if gnutls.check_version(b"3.5.6"):
604
gnutls_flags |= gnutls.NO_TICKETS
606
gnutls_flags |= gnutls.ENABLE_RAWPK
607
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
566
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
609
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gnutls.set_default_priority(self._c_object)
610
568
gnutls.transport_set_ptr(self._c_object, socket.fileno())
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569
gnutls.handshake_set_private_extensions(self._c_object,
653
611
return _error_code(result)
654
612
result = func(*arguments)
657
615
# Unless otherwise indicated, the function declarations below are
658
616
# all from the gnutls/gnutls.h C header file.
661
619
priority_set_direct = _library.gnutls_priority_set_direct
662
620
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
663
621
ctypes.POINTER(ctypes.c_char_p)]
664
622
priority_set_direct.restype = _error_code
666
624
init = _library.gnutls_init
667
625
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
668
626
init.restype = _error_code
670
628
set_default_priority = _library.gnutls_set_default_priority
671
629
set_default_priority.argtypes = [session_t]
672
630
set_default_priority.restype = _error_code
674
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record_send = _library.gnutls_record_send
675
633
record_send.argtypes = [session_t, ctypes.c_void_p,
677
635
record_send.restype = ctypes.c_ssize_t
678
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record_send.errcheck = _retry_on_error
680
638
certificate_allocate_credentials = (
681
639
_library.gnutls_certificate_allocate_credentials)
682
640
certificate_allocate_credentials.argtypes = [
683
641
ctypes.POINTER(certificate_credentials_t)]
684
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certificate_allocate_credentials.restype = _error_code
686
644
certificate_free_credentials = (
687
645
_library.gnutls_certificate_free_credentials)
688
certificate_free_credentials.argtypes = [
689
certificate_credentials_t]
646
certificate_free_credentials.argtypes = [certificate_credentials_t]
690
647
certificate_free_credentials.restype = None
692
649
handshake_set_private_extensions = (
693
650
_library.gnutls_handshake_set_private_extensions)
694
651
handshake_set_private_extensions.argtypes = [session_t,
696
653
handshake_set_private_extensions.restype = None
698
655
credentials_set = _library.gnutls_credentials_set
699
656
credentials_set.argtypes = [session_t, credentials_type_t,
701
658
credentials_set.restype = _error_code
703
660
strerror = _library.gnutls_strerror
704
661
strerror.argtypes = [ctypes.c_int]
705
662
strerror.restype = ctypes.c_char_p
707
664
certificate_type_get = _library.gnutls_certificate_type_get
708
665
certificate_type_get.argtypes = [session_t]
709
666
certificate_type_get.restype = _error_code
711
668
certificate_get_peers = _library.gnutls_certificate_get_peers
712
669
certificate_get_peers.argtypes = [session_t,
713
670
ctypes.POINTER(ctypes.c_uint)]
714
671
certificate_get_peers.restype = ctypes.POINTER(datum_t)
716
673
global_set_log_level = _library.gnutls_global_set_log_level
717
674
global_set_log_level.argtypes = [ctypes.c_int]
718
675
global_set_log_level.restype = None
720
677
global_set_log_function = _library.gnutls_global_set_log_function
721
678
global_set_log_function.argtypes = [log_func]
722
679
global_set_log_function.restype = None
724
681
deinit = _library.gnutls_deinit
725
682
deinit.argtypes = [session_t]
726
683
deinit.restype = None
728
685
handshake = _library.gnutls_handshake
729
686
handshake.argtypes = [session_t]
730
687
handshake.restype = _error_code
731
688
handshake.errcheck = _retry_on_error
733
690
transport_set_ptr = _library.gnutls_transport_set_ptr
734
691
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
735
692
transport_set_ptr.restype = None
737
694
bye = _library.gnutls_bye
738
695
bye.argtypes = [session_t, close_request_t]
739
696
bye.restype = _error_code
740
697
bye.errcheck = _retry_on_error
742
699
check_version = _library.gnutls_check_version
743
700
check_version.argtypes = [ctypes.c_char_p]
744
701
check_version.restype = ctypes.c_char_p
746
_need_version = b"3.3.0"
747
if check_version(_need_version) is None:
748
raise self.Error("Needs GnuTLS {} or later"
749
.format(_need_version))
751
_tls_rawpk_version = b"3.6.6"
752
has_rawpk = bool(check_version(_tls_rawpk_version))
756
class pubkey_st(ctypes.Structure):
758
pubkey_t = ctypes.POINTER(pubkey_st)
760
x509_crt_fmt_t = ctypes.c_int
762
# All the function declarations below are from gnutls/abstract.h
763
pubkey_init = _library.gnutls_pubkey_init
764
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
765
pubkey_init.restype = _error_code
767
pubkey_import = _library.gnutls_pubkey_import
768
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
770
pubkey_import.restype = _error_code
772
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
773
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
774
ctypes.POINTER(ctypes.c_ubyte),
775
ctypes.POINTER(ctypes.c_size_t)]
776
pubkey_get_key_id.restype = _error_code
778
pubkey_deinit = _library.gnutls_pubkey_deinit
779
pubkey_deinit.argtypes = [pubkey_t]
780
pubkey_deinit.restype = None
782
# All the function declarations below are from gnutls/openpgp.h
784
openpgp_crt_init = _library.gnutls_openpgp_crt_init
785
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
786
openpgp_crt_init.restype = _error_code
788
openpgp_crt_import = _library.gnutls_openpgp_crt_import
789
openpgp_crt_import.argtypes = [openpgp_crt_t,
790
ctypes.POINTER(datum_t),
792
openpgp_crt_import.restype = _error_code
794
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
795
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
796
ctypes.POINTER(ctypes.c_uint)]
797
openpgp_crt_verify_self.restype = _error_code
799
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
800
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
801
openpgp_crt_deinit.restype = None
803
openpgp_crt_get_fingerprint = (
804
_library.gnutls_openpgp_crt_get_fingerprint)
805
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
809
openpgp_crt_get_fingerprint.restype = _error_code
811
if check_version(b"3.6.4"):
812
certificate_type_get2 = _library.gnutls_certificate_type_get2
813
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
814
certificate_type_get2.restype = _error_code
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
816
732
# Remove non-public functions
817
733
del _error_code, _retry_on_error
734
# Create the global "gnutls" object, simulating a module
820
737
def call_pipe(connection, # : multiprocessing.Connection
821
738
func, *args, **kwargs):
822
739
"""This function is meant to be called by multiprocessing.Process
824
741
This function runs func(*args, **kwargs), and writes the resulting
825
742
return value on the provided multiprocessing.Connection.
827
744
connection.send(func(*args, **kwargs))
828
745
connection.close()
747
class Client(object):
832
748
"""A representation of a client host served by this server.
835
751
approved: bool(); 'None' if not yet approved/disapproved
836
752
approval_delay: datetime.timedelta(); Time to wait for approval
837
753
approval_duration: datetime.timedelta(); Duration of one approval
838
checker: multiprocessing.Process(); a running checker process used
839
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.
841
757
checker_callback_tag: a GLib event source tag, or None
842
758
checker_command: string; External command which is run to check
843
759
if client lives. %() expansions are done at
1520
1428
exc_info=error)
1521
1429
return xmlstring
1525
1432
dbus.OBJECT_MANAGER_IFACE
1526
1433
except AttributeError:
1527
1434
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1530
1436
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1531
1437
"""A D-Bus object with an ObjectManager.
1533
1439
Classes inheriting from this exposes the standard
1534
1440
GetManagedObjects call and the InterfacesAdded and
1535
1441
InterfacesRemoved signals on the standard
1536
1442
"org.freedesktop.DBus.ObjectManager" interface.
1538
1444
Note: No signals are sent automatically; they must be sent
1541
1447
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1542
out_signature="a{oa{sa{sv}}}")
1448
out_signature = "a{oa{sa{sv}}}")
1543
1449
def GetManagedObjects(self):
1544
1450
"""This function must be overridden"""
1545
1451
raise NotImplementedError()
1547
1453
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1548
signature="oa{sa{sv}}")
1454
signature = "oa{sa{sv}}")
1549
1455
def InterfacesAdded(self, object_path, interfaces_and_properties):
1552
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1458
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1553
1459
def InterfacesRemoved(self, object_path, interfaces):
1556
1462
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1558
path_keyword='object_path',
1559
connection_keyword='connection')
1463
out_signature = "s",
1464
path_keyword = 'object_path',
1465
connection_keyword = 'connection')
1560
1466
def Introspect(self, object_path, connection):
1561
1467
"""Overloading of standard D-Bus method.
1563
1469
Override return argument name of GetManagedObjects to be
1564
1470
"objpath_interfaces_and_properties"
2256
2152
class ClientHandler(socketserver.BaseRequestHandler, object):
2257
2153
"""A class to handle client connections.
2259
2155
Instantiated once for each connection to handle it.
2260
2156
Note: This will run in its own forked process."""
2262
2158
def handle(self):
2263
2159
with contextlib.closing(self.server.child_pipe) as child_pipe:
2264
2160
logger.info("TCP connection from: %s",
2265
2161
str(self.client_address))
2266
2162
logger.debug("Pipe FD: %d",
2267
2163
self.server.child_pipe.fileno())
2269
2165
session = gnutls.ClientSession(self.request)
2271
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2272
# "+AES-256-CBC", "+SHA1",
2273
# "+COMP-NULL", "+CTYPE-OPENPGP",
2167
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
2168
# "+AES-256-CBC", "+SHA1",
2169
# "+COMP-NULL", "+CTYPE-OPENPGP",
2275
2171
# Use a fallback default, since this MUST be set.
2276
2172
priority = self.server.gnutls_priority
2277
2173
if priority is None:
2278
2174
priority = "NORMAL"
2279
gnutls.priority_set_direct(session._c_object,
2280
priority.encode("utf-8"),
2175
gnutls.priority_set_direct(session._c_object, priority,
2283
2178
# Start communication using the Mandos protocol
2284
2179
# Get protocol number
2285
2180
line = self.request.makefile().readline()
2507
class MultiprocessingMixIn:
2345
class MultiprocessingMixIn(object):
2508
2346
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2510
2348
def sub_process_main(self, request, address):
2512
2350
self.finish_request(request, address)
2513
2351
except Exception:
2514
2352
self.handle_error(request, address)
2515
2353
self.close_request(request)
2517
2355
def process_request(self, request, address):
2518
2356
"""Start a new process to process the request."""
2519
proc = multiprocessing.Process(target=self.sub_process_main,
2520
args=(request, address))
2357
proc = multiprocessing.Process(target = self.sub_process_main,
2358
args = (request, address))
2525
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
2363
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2526
2364
""" adds a pipe to the MixIn """
2528
2366
def process_request(self, request, client_address):
2529
2367
"""Overrides and wraps the original process_request().
2531
2369
This function creates a new pipe in self.pipe
2533
2371
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2535
2373
proc = MultiprocessingMixIn.process_request(self, request,
2536
2374
client_address)
2537
2375
self.child_pipe.close()
2538
2376
self.add_pipe(parent_pipe, proc)
2540
2378
def add_pipe(self, parent_pipe, proc):
2541
2379
"""Dummy function; override as necessary"""
2542
2380
raise NotImplementedError()
2545
2383
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2546
socketserver.TCPServer):
2384
socketserver.TCPServer, object):
2547
2385
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2550
2388
enabled: Boolean; whether this server is activated yet
2551
2389
interface: None or a network interface name (string)
2552
2390
use_ipv6: Boolean; to use IPv6 or not
2555
2393
def __init__(self, server_address, RequestHandlerClass,
2556
2394
interface=None,
2591
2428
# socket_wrapper(), if socketfd was set.
2592
2429
socketserver.TCPServer.__init__(self, server_address,
2593
2430
RequestHandlerClass)
2595
2432
def server_bind(self):
2596
2433
"""This overrides the normal server_bind() function
2597
2434
to bind to an interface if one was specified, and also NOT to
2598
2435
bind to an address or port if they were not specified."""
2599
global SO_BINDTODEVICE
2600
2436
if self.interface is not None:
2601
2437
if SO_BINDTODEVICE is None:
2602
# Fall back to a hard-coded value which seems to be
2604
logger.warning("SO_BINDTODEVICE not found, trying 25")
2605
SO_BINDTODEVICE = 25
2607
self.socket.setsockopt(
2608
socket.SOL_SOCKET, SO_BINDTODEVICE,
2609
(self.interface + "\0").encode("utf-8"))
2610
except socket.error as error:
2611
if error.errno == errno.EPERM:
2612
logger.error("No permission to bind to"
2613
" interface %s", self.interface)
2614
elif error.errno == errno.ENOPROTOOPT:
2615
logger.error("SO_BINDTODEVICE not available;"
2616
" cannot bind to interface %s",
2618
elif error.errno == errno.ENODEV:
2619
logger.error("Interface %s does not exist,"
2620
" 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)
2623
2459
# Only bind(2) the socket if we really need to.
2624
2460
if self.server_address[0] or self.server_address[1]:
2625
if self.server_address[1]:
2626
self.allow_reuse_address = True
2627
2461
if not self.server_address[0]:
2628
2462
if self.address_family == socket.AF_INET6:
2629
any_address = "::" # in6addr_any
2463
any_address = "::" # in6addr_any
2631
any_address = "0.0.0.0" # INADDR_ANY
2465
any_address = "0.0.0.0" # INADDR_ANY
2632
2466
self.server_address = (any_address,
2633
2467
self.server_address[1])
2634
2468
elif not self.server_address[1]:
2668
2502
self.gnutls_priority = gnutls_priority
2669
2503
IPv6_TCPServer.__init__(self, server_address,
2670
2504
RequestHandlerClass,
2671
interface=interface,
2505
interface = interface,
2506
use_ipv6 = use_ipv6,
2507
socketfd = socketfd)
2675
2509
def server_activate(self):
2676
2510
if self.enabled:
2677
2511
return socketserver.TCPServer.server_activate(self)
2679
2513
def enable(self):
2680
2514
self.enabled = True
2682
2516
def add_pipe(self, parent_pipe, proc):
2683
2517
# Call "handle_ipc" for both data and EOF events
2684
2518
GLib.io_add_watch(
2685
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2686
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2519
parent_pipe.fileno(),
2520
GLib.IO_IN | GLib.IO_HUP,
2687
2521
functools.partial(self.handle_ipc,
2688
parent_pipe=parent_pipe,
2522
parent_pipe = parent_pipe,
2691
2525
def handle_ipc(self, source, condition,
2692
2526
parent_pipe=None,
2694
2528
client_object=None):
2695
2529
# error, or the other end of multiprocessing.Pipe has closed
2696
2530
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2697
2531
# Wait for other process to exit
2701
2535
# Read a request from the child
2702
2536
request = parent_pipe.recv()
2703
2537
command = request[0]
2705
2539
if command == 'init':
2706
key_id = request[1].decode("ascii")
2707
fpr = request[2].decode("ascii")
2708
address = request[3]
2541
address = request[2]
2710
2543
for c in self.clients.values():
2711
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2713
if key_id and c.key_id == key_id:
2716
if fpr and c.fingerprint == fpr:
2544
if c.fingerprint == fpr:
2720
logger.info("Client not found for key ID: %s, address"
2721
": %s", key_id or fpr, address)
2548
logger.info("Client not found for fingerprint: %s, ad"
2549
"dress: %s", fpr, address)
2722
2550
if self.use_dbus:
2723
2551
# Emit D-Bus signal
2724
mandos_dbus_service.ClientNotFound(key_id or fpr,
2552
mandos_dbus_service.ClientNotFound(fpr,
2726
2554
parent_pipe.send(False)
2729
2557
GLib.io_add_watch(
2730
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2731
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2558
parent_pipe.fileno(),
2559
GLib.IO_IN | GLib.IO_HUP,
2732
2560
functools.partial(self.handle_ipc,
2733
parent_pipe=parent_pipe,
2735
client_object=client))
2561
parent_pipe = parent_pipe,
2563
client_object = client))
2736
2564
parent_pipe.send(True)
2737
2565
# remove the old hook in favor of the new above hook on
2755
2583
parent_pipe.send((
2756
2584
'data', client_object.__getattribute__(attrname)))
2758
2586
if command == 'setattr':
2759
2587
attrname = request[1]
2760
2588
value = request[2]
2761
2589
setattr(client_object, attrname, value)
2766
2594
def rfc3339_duration_to_delta(duration):
2767
2595
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2769
>>> rfc3339_duration_to_delta("P7D") == datetime.timedelta(7)
2771
>>> rfc3339_duration_to_delta("PT60S") == datetime.timedelta(0, 60)
2773
>>> rfc3339_duration_to_delta("PT60M") == datetime.timedelta(0, 3600)
2775
>>> rfc3339_duration_to_delta("PT24H") == datetime.timedelta(1)
2777
>>> rfc3339_duration_to_delta("P1W") == datetime.timedelta(7)
2779
>>> rfc3339_duration_to_delta("PT5M30S") == datetime.timedelta(0, 330)
2781
>>> 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)
2785
2613
# Parsing an RFC 3339 duration with regular expressions is not
2786
2614
# possible - there would have to be multiple places for the same
2787
2615
# values, like seconds. The current code, while more esoteric, is
2788
2616
# cleaner without depending on a parsing library. If Python had a
2789
2617
# built-in library for parsing we would use it, but we'd like to
2790
2618
# avoid excessive use of external libraries.
2792
2620
# New type for defining tokens, syntax, and semantics all-in-one
2793
2621
Token = collections.namedtuple("Token", (
2794
2622
"regexp", # To match token; if "value" is not None, must have
2981
2806
parser.add_argument("--no-zeroconf", action="store_false",
2982
2807
dest="zeroconf", help="Do not use Zeroconf",
2985
2810
options = parser.parse_args()
2814
fail_count, test_count = doctest.testmod()
2815
sys.exit(os.EX_OK if fail_count == 0 else 1)
2987
2817
# Default values for config file for server-global settings
2988
if gnutls.has_rawpk:
2989
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2990
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2992
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2993
":+SIGN-DSA-SHA256")
2994
server_defaults = {"interface": "",
2998
"priority": priority,
2999
"servicename": "Mandos",
3005
"statedir": "/var/lib/mandos",
3006
"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",
3011
2836
# Parse config file for server-global settings
3012
server_config = configparser.ConfigParser(server_defaults)
2837
server_config = configparser.SafeConfigParser(server_defaults)
3013
2838
del server_defaults
3014
2839
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3015
# Convert the ConfigParser object to a dict
2840
# Convert the SafeConfigParser object to a dict
3016
2841
server_settings = server_config.defaults()
3017
2842
# Use the appropriate methods on the non-string config options
3018
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3019
"foreground", "zeroconf"):
2843
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
3020
2844
server_settings[option] = server_config.getboolean("DEFAULT",
3022
2846
if server_settings["port"]:
3195
3019
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3196
3020
service = AvahiServiceToSyslog(
3197
name=server_settings["servicename"],
3198
servicetype="_mandos._tcp",
3021
name = server_settings["servicename"],
3022
servicetype = "_mandos._tcp",
3023
protocol = protocol,
3201
3025
if server_settings["interface"]:
3202
3026
service.interface = if_nametoindex(
3203
3027
server_settings["interface"].encode("utf-8"))
3205
3029
global multiprocessing_manager
3206
3030
multiprocessing_manager = multiprocessing.Manager()
3208
3032
client_class = Client
3210
client_class = functools.partial(ClientDBus, bus=bus)
3034
client_class = functools.partial(ClientDBus, bus = bus)
3212
3036
client_settings = Client.config_parser(client_config)
3213
3037
old_client_settings = {}
3214
3038
clients_data = {}
3216
3040
# This is used to redirect stdout and stderr for checker processes
3218
wnull = open(os.devnull, "w") # A writable /dev/null
3042
wnull = open(os.devnull, "w") # A writable /dev/null
3219
3043
# Only used if server is running in foreground but not in debug
3221
3045
if debug or not foreground:
3224
3048
# Get client data and settings from last running state.
3225
3049
if server_settings["restore"]:
3227
3051
with open(stored_state_path, "rb") as stored_state:
3228
if sys.version_info.major == 2:
3052
if sys.version_info.major == 2:
3229
3053
clients_data, old_client_settings = pickle.load(
3232
3056
bytes_clients_data, bytes_old_client_settings = (
3233
pickle.load(stored_state, encoding="bytes"))
3234
# Fix bytes to strings
3057
pickle.load(stored_state, encoding = "bytes"))
3058
### Fix bytes to strings
3237
clients_data = {(key.decode("utf-8")
3238
if isinstance(key, bytes)
3241
bytes_clients_data.items()}
3061
clients_data = { (key.decode("utf-8")
3062
if isinstance(key, bytes)
3065
bytes_clients_data.items() }
3242
3066
del bytes_clients_data
3243
3067
for key in clients_data:
3244
value = {(k.decode("utf-8")
3245
if isinstance(k, bytes) else k): v
3247
clients_data[key].items()}
3068
value = { (k.decode("utf-8")
3069
if isinstance(k, bytes) else k): v
3071
clients_data[key].items() }
3248
3072
clients_data[key] = value
3249
3073
# .client_structure
3250
3074
value["client_structure"] = [
3251
3075
(s.decode("utf-8")
3252
3076
if isinstance(s, bytes)
3253
3077
else s) for s in
3254
value["client_structure"]]
3255
# .name, .host, and .checker_command
3256
for k in ("name", "host", "checker_command"):
3078
value["client_structure"] ]
3080
for k in ("name", "host"):
3257
3081
if isinstance(value[k], bytes):
3258
3082
value[k] = value[k].decode("utf-8")
3259
if "key_id" not in value:
3260
value["key_id"] = ""
3261
elif "fingerprint" not in value:
3262
value["fingerprint"] = ""
3263
# old_client_settings
3083
## old_client_settings
3265
3085
old_client_settings = {
3266
3086
(key.decode("utf-8")
3267
3087
if isinstance(key, bytes)
3268
3088
else key): value
3269
3089
for key, value in
3270
bytes_old_client_settings.items()}
3090
bytes_old_client_settings.items() }
3271
3091
del bytes_old_client_settings
3272
# .host and .checker_command
3273
3093
for value in old_client_settings.values():
3274
for attribute in ("host", "checker_command"):
3275
if isinstance(value[attribute], bytes):
3276
value[attribute] = (value[attribute]
3094
if isinstance(value["host"], bytes):
3095
value["host"] = (value["host"]
3278
3097
os.remove(stored_state_path)
3279
3098
except IOError as e:
3280
3099
if e.errno == errno.ENOENT: