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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 -*-
2
# -*- mode: python; coding: utf-8 -*-
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4
# Mandos server - give out binary blobs to connecting clients.
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6
# This program is partly derived from an example program for an Avahi
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7
# 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
22
# 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
26
24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27
25
# GNU General Public License for more details.
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27
# 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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34
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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91
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)
251
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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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
272
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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474
def rename(self, *args, **kwargs):
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"""Add the new name to the syslog messages"""
510
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
476
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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479
.format(self.name)))
517
482
# Pretend that we have a GnuTLS module
519
"""This isn't so much a class as it is a module-like namespace."""
521
library = ctypes.util.find_library("gnutls")
523
library = ctypes.util.find_library("gnutls-deb0")
524
_library = ctypes.cdll.LoadLibrary(library)
483
class GnuTLS(object):
484
"""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
494
if GnuTLS.check_version(self._need_version) is None:
495
raise GnuTLS.Error("Needs GnuTLS {} or later"
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.format(self._need_version))
527
498
# Unless otherwise indicated, the constants and types below are
528
499
# all from the gnutls/gnutls.h C header file.
532
503
E_INTERRUPTED = -52
538
508
CRD_CERTIFICATE = 1
539
509
E_NO_CERTIFICATE_FOUND = -49
544
KEYID_USE_SHA256 = 1 # gnutls/x509.h
545
510
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
548
513
class session_int(ctypes.Structure):
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session_t = ctypes.POINTER(session_int)
552
516
class certificate_credentials_st(ctypes.Structure):
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518
certificate_credentials_t = ctypes.POINTER(
555
519
certificate_credentials_st)
556
520
certificate_type_t = ctypes.c_int
558
521
class datum_t(ctypes.Structure):
559
522
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
560
523
('size', ctypes.c_uint)]
562
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class openpgp_crt_int(ctypes.Structure):
564
526
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
565
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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528
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
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529
credentials_type_t = ctypes.c_int
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530
transport_ptr_t = ctypes.c_void_p
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531
close_request_t = ctypes.c_int
572
534
class Error(Exception):
573
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
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541
# code is passed, convert it to a string with
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# gnutls.strerror()
578
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if message is None and code is not None:
579
message = gnutls.strerror(code)
580
return super(gnutls.Error, self).__init__(
545
message = GnuTLS.strerror(code)
546
return super(GnuTLS.Error, self).__init__(
583
549
class CertificateSecurityError(Error):
553
class Credentials(object):
588
554
def __init__(self):
589
555
self._c_object = gnutls.certificate_credentials_t()
590
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gnutls.certificate_allocate_credentials(
591
557
ctypes.byref(self._c_object))
592
558
self.type = gnutls.CRD_CERTIFICATE
594
560
def __del__(self):
595
561
gnutls.certificate_free_credentials(self._c_object)
598
def __init__(self, socket, credentials=None):
563
class ClientSession(object):
564
def __init__(self, socket, credentials = None):
599
565
self._c_object = gnutls.session_t()
600
gnutls_flags = gnutls.CLIENT
601
if gnutls.check_version(b"3.5.6"):
602
gnutls_flags |= gnutls.NO_TICKETS
604
gnutls_flags |= gnutls.ENABLE_RAWPK
605
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
566
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
607
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gnutls.set_default_priority(self._c_object)
608
568
gnutls.transport_set_ptr(self._c_object, socket.fileno())
609
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gnutls.handshake_set_private_extensions(self._c_object,
651
611
return _error_code(result)
652
612
result = func(*arguments)
655
615
# Unless otherwise indicated, the function declarations below are
656
616
# all from the gnutls/gnutls.h C header file.
659
619
priority_set_direct = _library.gnutls_priority_set_direct
660
620
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
661
621
ctypes.POINTER(ctypes.c_char_p)]
662
622
priority_set_direct.restype = _error_code
664
624
init = _library.gnutls_init
665
625
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
666
626
init.restype = _error_code
668
628
set_default_priority = _library.gnutls_set_default_priority
669
629
set_default_priority.argtypes = [session_t]
670
630
set_default_priority.restype = _error_code
672
632
record_send = _library.gnutls_record_send
673
633
record_send.argtypes = [session_t, ctypes.c_void_p,
675
635
record_send.restype = ctypes.c_ssize_t
676
636
record_send.errcheck = _retry_on_error
678
638
certificate_allocate_credentials = (
679
639
_library.gnutls_certificate_allocate_credentials)
680
640
certificate_allocate_credentials.argtypes = [
681
641
ctypes.POINTER(certificate_credentials_t)]
682
642
certificate_allocate_credentials.restype = _error_code
684
644
certificate_free_credentials = (
685
645
_library.gnutls_certificate_free_credentials)
686
certificate_free_credentials.argtypes = [
687
certificate_credentials_t]
646
certificate_free_credentials.argtypes = [certificate_credentials_t]
688
647
certificate_free_credentials.restype = None
690
649
handshake_set_private_extensions = (
691
650
_library.gnutls_handshake_set_private_extensions)
692
651
handshake_set_private_extensions.argtypes = [session_t,
694
653
handshake_set_private_extensions.restype = None
696
655
credentials_set = _library.gnutls_credentials_set
697
656
credentials_set.argtypes = [session_t, credentials_type_t,
699
658
credentials_set.restype = _error_code
701
660
strerror = _library.gnutls_strerror
702
661
strerror.argtypes = [ctypes.c_int]
703
662
strerror.restype = ctypes.c_char_p
705
664
certificate_type_get = _library.gnutls_certificate_type_get
706
665
certificate_type_get.argtypes = [session_t]
707
666
certificate_type_get.restype = _error_code
709
668
certificate_get_peers = _library.gnutls_certificate_get_peers
710
669
certificate_get_peers.argtypes = [session_t,
711
670
ctypes.POINTER(ctypes.c_uint)]
712
671
certificate_get_peers.restype = ctypes.POINTER(datum_t)
714
673
global_set_log_level = _library.gnutls_global_set_log_level
715
674
global_set_log_level.argtypes = [ctypes.c_int]
716
675
global_set_log_level.restype = None
718
677
global_set_log_function = _library.gnutls_global_set_log_function
719
678
global_set_log_function.argtypes = [log_func]
720
679
global_set_log_function.restype = None
722
681
deinit = _library.gnutls_deinit
723
682
deinit.argtypes = [session_t]
724
683
deinit.restype = None
726
685
handshake = _library.gnutls_handshake
727
686
handshake.argtypes = [session_t]
728
687
handshake.restype = _error_code
729
688
handshake.errcheck = _retry_on_error
731
690
transport_set_ptr = _library.gnutls_transport_set_ptr
732
691
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
733
692
transport_set_ptr.restype = None
735
694
bye = _library.gnutls_bye
736
695
bye.argtypes = [session_t, close_request_t]
737
696
bye.restype = _error_code
738
697
bye.errcheck = _retry_on_error
740
699
check_version = _library.gnutls_check_version
741
700
check_version.argtypes = [ctypes.c_char_p]
742
701
check_version.restype = ctypes.c_char_p
744
_need_version = b"3.3.0"
745
if check_version(_need_version) is None:
746
raise self.Error("Needs GnuTLS {} or later"
747
.format(_need_version))
749
_tls_rawpk_version = b"3.6.6"
750
has_rawpk = bool(check_version(_tls_rawpk_version))
754
class pubkey_st(ctypes.Structure):
756
pubkey_t = ctypes.POINTER(pubkey_st)
758
x509_crt_fmt_t = ctypes.c_int
760
# All the function declarations below are from gnutls/abstract.h
761
pubkey_init = _library.gnutls_pubkey_init
762
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
763
pubkey_init.restype = _error_code
765
pubkey_import = _library.gnutls_pubkey_import
766
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
768
pubkey_import.restype = _error_code
770
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
771
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
772
ctypes.POINTER(ctypes.c_ubyte),
773
ctypes.POINTER(ctypes.c_size_t)]
774
pubkey_get_key_id.restype = _error_code
776
pubkey_deinit = _library.gnutls_pubkey_deinit
777
pubkey_deinit.argtypes = [pubkey_t]
778
pubkey_deinit.restype = None
780
# All the function declarations below are from gnutls/openpgp.h
782
openpgp_crt_init = _library.gnutls_openpgp_crt_init
783
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
784
openpgp_crt_init.restype = _error_code
786
openpgp_crt_import = _library.gnutls_openpgp_crt_import
787
openpgp_crt_import.argtypes = [openpgp_crt_t,
788
ctypes.POINTER(datum_t),
790
openpgp_crt_import.restype = _error_code
792
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
793
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
794
ctypes.POINTER(ctypes.c_uint)]
795
openpgp_crt_verify_self.restype = _error_code
797
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
798
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
799
openpgp_crt_deinit.restype = None
801
openpgp_crt_get_fingerprint = (
802
_library.gnutls_openpgp_crt_get_fingerprint)
803
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
807
openpgp_crt_get_fingerprint.restype = _error_code
809
if check_version(b"3.6.4"):
810
certificate_type_get2 = _library.gnutls_certificate_type_get2
811
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
812
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
814
732
# Remove non-public functions
815
733
del _error_code, _retry_on_error
734
# Create the global "gnutls" object, simulating a module
818
737
def call_pipe(connection, # : multiprocessing.Connection
819
738
func, *args, **kwargs):
820
739
"""This function is meant to be called by multiprocessing.Process
822
741
This function runs func(*args, **kwargs), and writes the resulting
823
742
return value on the provided multiprocessing.Connection.
825
744
connection.send(func(*args, **kwargs))
826
745
connection.close()
747
class Client(object):
830
748
"""A representation of a client host served by this server.
833
751
approved: bool(); 'None' if not yet approved/disapproved
834
752
approval_delay: datetime.timedelta(); Time to wait for approval
835
753
approval_duration: datetime.timedelta(); Duration of one approval
836
checker: multiprocessing.Process(); a running checker process used
837
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.
839
757
checker_callback_tag: a GLib event source tag, or None
840
758
checker_command: string; External command which is run to check
841
759
if client lives. %() expansions are done at
1517
1428
exc_info=error)
1518
1429
return xmlstring
1522
1432
dbus.OBJECT_MANAGER_IFACE
1523
1433
except AttributeError:
1524
1434
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1527
1436
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1528
1437
"""A D-Bus object with an ObjectManager.
1530
1439
Classes inheriting from this exposes the standard
1531
1440
GetManagedObjects call and the InterfacesAdded and
1532
1441
InterfacesRemoved signals on the standard
1533
1442
"org.freedesktop.DBus.ObjectManager" interface.
1535
1444
Note: No signals are sent automatically; they must be sent
1538
1447
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1539
out_signature="a{oa{sa{sv}}}")
1448
out_signature = "a{oa{sa{sv}}}")
1540
1449
def GetManagedObjects(self):
1541
1450
"""This function must be overridden"""
1542
1451
raise NotImplementedError()
1544
1453
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1545
signature="oa{sa{sv}}")
1454
signature = "oa{sa{sv}}")
1546
1455
def InterfacesAdded(self, object_path, interfaces_and_properties):
1549
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1458
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1550
1459
def InterfacesRemoved(self, object_path, interfaces):
1553
1462
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1555
path_keyword='object_path',
1556
connection_keyword='connection')
1463
out_signature = "s",
1464
path_keyword = 'object_path',
1465
connection_keyword = 'connection')
1557
1466
def Introspect(self, object_path, connection):
1558
1467
"""Overloading of standard D-Bus method.
1560
1469
Override return argument name of GetManagedObjects to be
1561
1470
"objpath_interfaces_and_properties"
2253
2152
class ClientHandler(socketserver.BaseRequestHandler, object):
2254
2153
"""A class to handle client connections.
2256
2155
Instantiated once for each connection to handle it.
2257
2156
Note: This will run in its own forked process."""
2259
2158
def handle(self):
2260
2159
with contextlib.closing(self.server.child_pipe) as child_pipe:
2261
2160
logger.info("TCP connection from: %s",
2262
2161
str(self.client_address))
2263
2162
logger.debug("Pipe FD: %d",
2264
2163
self.server.child_pipe.fileno())
2266
2165
session = gnutls.ClientSession(self.request)
2268
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2269
# "+AES-256-CBC", "+SHA1",
2270
# "+COMP-NULL", "+CTYPE-OPENPGP",
2167
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
2168
# "+AES-256-CBC", "+SHA1",
2169
# "+COMP-NULL", "+CTYPE-OPENPGP",
2272
2171
# Use a fallback default, since this MUST be set.
2273
2172
priority = self.server.gnutls_priority
2274
2173
if priority is None:
2275
2174
priority = "NORMAL"
2276
gnutls.priority_set_direct(session._c_object,
2277
priority.encode("utf-8"),
2175
gnutls.priority_set_direct(session._c_object, priority,
2280
2178
# Start communication using the Mandos protocol
2281
2179
# Get protocol number
2282
2180
line = self.request.makefile().readline()
2504
class MultiprocessingMixIn:
2345
class MultiprocessingMixIn(object):
2505
2346
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2507
2348
def sub_process_main(self, request, address):
2509
2350
self.finish_request(request, address)
2510
2351
except Exception:
2511
2352
self.handle_error(request, address)
2512
2353
self.close_request(request)
2514
2355
def process_request(self, request, address):
2515
2356
"""Start a new process to process the request."""
2516
proc = multiprocessing.Process(target=self.sub_process_main,
2517
args=(request, address))
2357
proc = multiprocessing.Process(target = self.sub_process_main,
2358
args = (request, address))
2522
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
2363
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2523
2364
""" adds a pipe to the MixIn """
2525
2366
def process_request(self, request, client_address):
2526
2367
"""Overrides and wraps the original process_request().
2528
2369
This function creates a new pipe in self.pipe
2530
2371
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2532
2373
proc = MultiprocessingMixIn.process_request(self, request,
2533
2374
client_address)
2534
2375
self.child_pipe.close()
2535
2376
self.add_pipe(parent_pipe, proc)
2537
2378
def add_pipe(self, parent_pipe, proc):
2538
2379
"""Dummy function; override as necessary"""
2539
2380
raise NotImplementedError()
2542
2383
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2543
socketserver.TCPServer):
2384
socketserver.TCPServer, object):
2544
2385
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2547
2388
enabled: Boolean; whether this server is activated yet
2548
2389
interface: None or a network interface name (string)
2549
2390
use_ipv6: Boolean; to use IPv6 or not
2552
2393
def __init__(self, server_address, RequestHandlerClass,
2553
2394
interface=None,
2588
2428
# socket_wrapper(), if socketfd was set.
2589
2429
socketserver.TCPServer.__init__(self, server_address,
2590
2430
RequestHandlerClass)
2592
2432
def server_bind(self):
2593
2433
"""This overrides the normal server_bind() function
2594
2434
to bind to an interface if one was specified, and also NOT to
2595
2435
bind to an address or port if they were not specified."""
2596
global SO_BINDTODEVICE
2597
2436
if self.interface is not None:
2598
2437
if SO_BINDTODEVICE is None:
2599
# Fall back to a hard-coded value which seems to be
2601
logger.warning("SO_BINDTODEVICE not found, trying 25")
2602
SO_BINDTODEVICE = 25
2604
self.socket.setsockopt(
2605
socket.SOL_SOCKET, SO_BINDTODEVICE,
2606
(self.interface + "\0").encode("utf-8"))
2607
except socket.error as error:
2608
if error.errno == errno.EPERM:
2609
logger.error("No permission to bind to"
2610
" interface %s", self.interface)
2611
elif error.errno == errno.ENOPROTOOPT:
2612
logger.error("SO_BINDTODEVICE not available;"
2613
" cannot bind to interface %s",
2615
elif error.errno == errno.ENODEV:
2616
logger.error("Interface %s does not exist,"
2617
" 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)
2620
2459
# Only bind(2) the socket if we really need to.
2621
2460
if self.server_address[0] or self.server_address[1]:
2622
if self.server_address[1]:
2623
self.allow_reuse_address = True
2624
2461
if not self.server_address[0]:
2625
2462
if self.address_family == socket.AF_INET6:
2626
any_address = "::" # in6addr_any
2463
any_address = "::" # in6addr_any
2628
any_address = "0.0.0.0" # INADDR_ANY
2465
any_address = "0.0.0.0" # INADDR_ANY
2629
2466
self.server_address = (any_address,
2630
2467
self.server_address[1])
2631
2468
elif not self.server_address[1]:
2665
2502
self.gnutls_priority = gnutls_priority
2666
2503
IPv6_TCPServer.__init__(self, server_address,
2667
2504
RequestHandlerClass,
2668
interface=interface,
2505
interface = interface,
2506
use_ipv6 = use_ipv6,
2507
socketfd = socketfd)
2672
2509
def server_activate(self):
2673
2510
if self.enabled:
2674
2511
return socketserver.TCPServer.server_activate(self)
2676
2513
def enable(self):
2677
2514
self.enabled = True
2679
2516
def add_pipe(self, parent_pipe, proc):
2680
2517
# Call "handle_ipc" for both data and EOF events
2681
2518
GLib.io_add_watch(
2682
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2683
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2519
parent_pipe.fileno(),
2520
GLib.IO_IN | GLib.IO_HUP,
2684
2521
functools.partial(self.handle_ipc,
2685
parent_pipe=parent_pipe,
2522
parent_pipe = parent_pipe,
2688
2525
def handle_ipc(self, source, condition,
2689
2526
parent_pipe=None,
2691
2528
client_object=None):
2692
2529
# error, or the other end of multiprocessing.Pipe has closed
2693
2530
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2694
2531
# Wait for other process to exit
2698
2535
# Read a request from the child
2699
2536
request = parent_pipe.recv()
2700
2537
command = request[0]
2702
2539
if command == 'init':
2703
key_id = request[1].decode("ascii")
2704
fpr = request[2].decode("ascii")
2705
address = request[3]
2541
address = request[2]
2707
2543
for c in self.clients.values():
2708
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2710
if key_id and c.key_id == key_id:
2713
if fpr and c.fingerprint == fpr:
2544
if c.fingerprint == fpr:
2717
logger.info("Client not found for key ID: %s, address"
2718
": %s", key_id or fpr, address)
2548
logger.info("Client not found for fingerprint: %s, ad"
2549
"dress: %s", fpr, address)
2719
2550
if self.use_dbus:
2720
2551
# Emit D-Bus signal
2721
mandos_dbus_service.ClientNotFound(key_id or fpr,
2552
mandos_dbus_service.ClientNotFound(fpr,
2723
2554
parent_pipe.send(False)
2726
2557
GLib.io_add_watch(
2727
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2728
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2558
parent_pipe.fileno(),
2559
GLib.IO_IN | GLib.IO_HUP,
2729
2560
functools.partial(self.handle_ipc,
2730
parent_pipe=parent_pipe,
2732
client_object=client))
2561
parent_pipe = parent_pipe,
2563
client_object = client))
2733
2564
parent_pipe.send(True)
2734
2565
# remove the old hook in favor of the new above hook on
2752
2583
parent_pipe.send((
2753
2584
'data', client_object.__getattribute__(attrname)))
2755
2586
if command == 'setattr':
2756
2587
attrname = request[1]
2757
2588
value = request[2]
2758
2589
setattr(client_object, attrname, value)
2763
2594
def rfc3339_duration_to_delta(duration):
2764
2595
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2766
>>> rfc3339_duration_to_delta("P7D") == datetime.timedelta(7)
2768
>>> rfc3339_duration_to_delta("PT60S") == datetime.timedelta(0, 60)
2770
>>> rfc3339_duration_to_delta("PT60M") == datetime.timedelta(0, 3600)
2772
>>> rfc3339_duration_to_delta("PT24H") == datetime.timedelta(1)
2774
>>> rfc3339_duration_to_delta("P1W") == datetime.timedelta(7)
2776
>>> rfc3339_duration_to_delta("PT5M30S") == datetime.timedelta(0, 330)
2778
>>> 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)
2782
2613
# Parsing an RFC 3339 duration with regular expressions is not
2783
2614
# possible - there would have to be multiple places for the same
2784
2615
# values, like seconds. The current code, while more esoteric, is
2785
2616
# cleaner without depending on a parsing library. If Python had a
2786
2617
# built-in library for parsing we would use it, but we'd like to
2787
2618
# avoid excessive use of external libraries.
2789
2620
# New type for defining tokens, syntax, and semantics all-in-one
2790
2621
Token = collections.namedtuple("Token", (
2791
2622
"regexp", # To match token; if "value" is not None, must have
2978
2806
parser.add_argument("--no-zeroconf", action="store_false",
2979
2807
dest="zeroconf", help="Do not use Zeroconf",
2982
2810
options = parser.parse_args()
2814
fail_count, test_count = doctest.testmod()
2815
sys.exit(os.EX_OK if fail_count == 0 else 1)
2984
2817
# Default values for config file for server-global settings
2985
if gnutls.has_rawpk:
2986
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2987
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2989
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2990
":+SIGN-DSA-SHA256")
2991
server_defaults = {"interface": "",
2995
"priority": priority,
2996
"servicename": "Mandos",
3002
"statedir": "/var/lib/mandos",
3003
"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",
3008
2836
# Parse config file for server-global settings
3009
server_config = configparser.ConfigParser(server_defaults)
2837
server_config = configparser.SafeConfigParser(server_defaults)
3010
2838
del server_defaults
3011
2839
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3012
# Convert the ConfigParser object to a dict
2840
# Convert the SafeConfigParser object to a dict
3013
2841
server_settings = server_config.defaults()
3014
2842
# Use the appropriate methods on the non-string config options
3015
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3016
"foreground", "zeroconf"):
2843
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
3017
2844
server_settings[option] = server_config.getboolean("DEFAULT",
3019
2846
if server_settings["port"]:
3192
3019
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3193
3020
service = AvahiServiceToSyslog(
3194
name=server_settings["servicename"],
3195
servicetype="_mandos._tcp",
3021
name = server_settings["servicename"],
3022
servicetype = "_mandos._tcp",
3023
protocol = protocol,
3198
3025
if server_settings["interface"]:
3199
3026
service.interface = if_nametoindex(
3200
3027
server_settings["interface"].encode("utf-8"))
3202
3029
global multiprocessing_manager
3203
3030
multiprocessing_manager = multiprocessing.Manager()
3205
3032
client_class = Client
3207
client_class = functools.partial(ClientDBus, bus=bus)
3034
client_class = functools.partial(ClientDBus, bus = bus)
3209
3036
client_settings = Client.config_parser(client_config)
3210
3037
old_client_settings = {}
3211
3038
clients_data = {}
3213
3040
# This is used to redirect stdout and stderr for checker processes
3215
wnull = open(os.devnull, "w") # A writable /dev/null
3042
wnull = open(os.devnull, "w") # A writable /dev/null
3216
3043
# Only used if server is running in foreground but not in debug
3218
3045
if debug or not foreground:
3221
3048
# Get client data and settings from last running state.
3222
3049
if server_settings["restore"]:
3224
3051
with open(stored_state_path, "rb") as stored_state:
3225
if sys.version_info.major == 2:
3052
if sys.version_info.major == 2:
3226
3053
clients_data, old_client_settings = pickle.load(
3229
3056
bytes_clients_data, bytes_old_client_settings = (
3230
pickle.load(stored_state, encoding="bytes"))
3231
# Fix bytes to strings
3057
pickle.load(stored_state, encoding = "bytes"))
3058
### Fix bytes to strings
3234
clients_data = {(key.decode("utf-8")
3235
if isinstance(key, bytes)
3238
bytes_clients_data.items()}
3061
clients_data = { (key.decode("utf-8")
3062
if isinstance(key, bytes)
3065
bytes_clients_data.items() }
3239
3066
del bytes_clients_data
3240
3067
for key in clients_data:
3241
value = {(k.decode("utf-8")
3242
if isinstance(k, bytes) else k): v
3244
clients_data[key].items()}
3068
value = { (k.decode("utf-8")
3069
if isinstance(k, bytes) else k): v
3071
clients_data[key].items() }
3245
3072
clients_data[key] = value
3246
3073
# .client_structure
3247
3074
value["client_structure"] = [
3248
3075
(s.decode("utf-8")
3249
3076
if isinstance(s, bytes)
3250
3077
else s) for s in
3251
value["client_structure"]]
3252
# .name, .host, and .checker_command
3253
for k in ("name", "host", "checker_command"):
3078
value["client_structure"] ]
3080
for k in ("name", "host"):
3254
3081
if isinstance(value[k], bytes):
3255
3082
value[k] = value[k].decode("utf-8")
3256
if "key_id" not in value:
3257
value["key_id"] = ""
3258
elif "fingerprint" not in value:
3259
value["fingerprint"] = ""
3260
# old_client_settings
3083
## old_client_settings
3262
3085
old_client_settings = {
3263
3086
(key.decode("utf-8")
3264
3087
if isinstance(key, bytes)
3265
3088
else key): value
3266
3089
for key, value in
3267
bytes_old_client_settings.items()}
3090
bytes_old_client_settings.items() }
3268
3091
del bytes_old_client_settings
3269
# .host and .checker_command
3270
3093
for value in old_client_settings.values():
3271
for attribute in ("host", "checker_command"):
3272
if isinstance(value[attribute], bytes):
3273
value[attribute] = (value[attribute]
3094
if isinstance(value["host"], bytes):
3095
value["host"] = (value["host"]
3275
3097
os.remove(stored_state_path)
3276
3098
except IOError as e:
3277
3099
if e.errno == errno.ENOENT: