/mandos/trunk : revision 237.4.80

1

#!/usr/bin/python2.7

1

#!/usr/bin/python

2

# -*- mode: python; coding: utf-8 -*-

3

#

4

# Mandos server - give out binary blobs to connecting clients.

11

# "AvahiService" class, and some lines in "main".

12

#

13

# Everything else is

14

15

14

15

16

#

17

# This program is free software: you can redistribute it and/or modify

18

# it under the terms of the GNU General Public License as published by

34

from __future__ import (division, absolute_import, print_function,

35

unicode_literals)

36

37

from future_builtins import *

37

try:

38

from future_builtins import *

39

except ImportError:

40

pass

38

41

39

42

try:

40

43

import SocketServer as socketserver

44

47

import argparse

45

48

import datetime

46

49

import errno

47

import gnutls.crypto

48

import gnutls.connection

49

import gnutls.errors

50

import gnutls.library.functions

51

import gnutls.library.constants

52

import gnutls.library.types

53

50

try:

54

51

import ConfigParser as configparser

55

52

except ImportError:

82

79

83

80

import dbus

84

81

import dbus.service

85

try:

86

import gobject

87

except ImportError:

88

from gi.repository import GObject as gobject

89

import avahi

82

from gi.repository import GLib

90

83

from dbus.mainloop.glib import DBusGMainLoop

91

84

import ctypes

92

85

import ctypes.util

93

86

import xml.dom.minidom

94

87

import inspect

95

88

89

# Try to find the value of SO_BINDTODEVICE:

96

90

try:

91

# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and

92

# newer, and it is also the most natural place for it:

97

93

SO_BINDTODEVICE = socket.SO_BINDTODEVICE

98

94

except AttributeError:

99

95

try:

96

# This is where SO_BINDTODEVICE was up to and including Python

97

# 2.6, and also 3.2:

100

98

from IN import SO_BINDTODEVICE

101

99

except ImportError:

102

SO_BINDTODEVICE = None

100

# In Python 2.7 it seems to have been removed entirely.

101

# Try running the C preprocessor:

102

try:

103

cc = subprocess.Popen(["cc", "--language=c", "-E",

104

"/dev/stdin"],

105

stdin=subprocess.PIPE,

106

stdout=subprocess.PIPE)

107

stdout = cc.communicate(

108

"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]

109

SO_BINDTODEVICE = int(stdout.splitlines()[-1])

110

except (OSError, ValueError, IndexError):

111

# No value found

112

SO_BINDTODEVICE = None

103

113

104

114

if sys.version_info.major == 2:

105

115

str = unicode

106

116

107

version = "1.6.9"

117

version = "1.7.10"

108

118

stored_state_file = "clients.pickle"

109

119

110

120

logger = logging.getLogger()

125

135

return interface_index

126

136

127

137

138

def copy_function(func):

139

"""Make a copy of a function"""

140

if sys.version_info.major == 2:

141

return types.FunctionType(func.func_code,

142

func.func_globals,

143

func.func_name,

144

func.func_defaults,

145

func.func_closure)

146

else:

147

return types.FunctionType(func.__code__,

148

func.__globals__,

149

func.__name__,

150

func.__defaults__,

151

func.__closure__)

152

153

128

154

def initlogger(debug, level=logging.WARNING):

129

155

"""init logger and add loglevel"""

130

156

157

183

158

184

def __init__(self):

159

185

self.tempdir = tempfile.mkdtemp(prefix="mandos-")

186

self.gpg = "gpg"

187

try:

188

output = subprocess.check_output(["gpgconf"])

189

for line in output.splitlines():

190

name, text, path = line.split(b":")

191

if name == "gpg":

192

self.gpg = path

193

break

194

except OSError as e:

195

if e.errno != errno.ENOENT:

196

raise

160

197

self.gnupgargs = ['--batch',

161

'--home', self.tempdir,

198

'--homedir', self.tempdir,

162

199

'--force-mdc',

163

'--quiet',

164

'--no-use-agent']

200

'--quiet']

201

# Only GPG version 1 has the --no-use-agent option.

202

if self.gpg == "gpg" or self.gpg.endswith("/gpg"):

203

self.gnupgargs.append("--no-use-agent")

165

204

166

205

def __enter__(self):

167

206

return self

203

242

dir=self.tempdir) as passfile:

204

243

passfile.write(passphrase)

205

244

passfile.flush()

206

proc = subprocess.Popen(['gpg', '--symmetric',

245

proc = subprocess.Popen([self.gpg, '--symmetric',

207

246

'--passphrase-file',

208

247

passfile.name]

209

248

+ self.gnupgargs,

221

260

dir = self.tempdir) as passfile:

222

261

passfile.write(passphrase)

223

262

passfile.flush()

224

proc = subprocess.Popen(['gpg', '--decrypt',

263

proc = subprocess.Popen([self.gpg, '--decrypt',

225

264

'--passphrase-file',

226

265

passfile.name]

227

266

+ self.gnupgargs,

233

272

raise PGPError(err)

234

273

return decrypted_plaintext

235

274

275

# Pretend that we have an Avahi module

276

class Avahi(object):

277

"""This isn't so much a class as it is a module-like namespace.

278

It is instantiated once, and simulates having an Avahi module."""

279

IF_UNSPEC = -1 # avahi-common/address.h

280

PROTO_UNSPEC = -1 # avahi-common/address.h

281

PROTO_INET = 0 # avahi-common/address.h

282

PROTO_INET6 = 1 # avahi-common/address.h

283

DBUS_NAME = "org.freedesktop.Avahi"

284

DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

285

DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

286

DBUS_PATH_SERVER = "/"

287

def string_array_to_txt_array(self, t):

288

return dbus.Array((dbus.ByteArray(s.encode("utf-8"))

289

for s in t), signature="ay")

290

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

291

ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

292

ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

293

SERVER_INVALID = 0 # avahi-common/defs.h

294

SERVER_REGISTERING = 1 # avahi-common/defs.h

295

SERVER_RUNNING = 2 # avahi-common/defs.h

296

SERVER_COLLISION = 3 # avahi-common/defs.h

297

SERVER_FAILURE = 4 # avahi-common/defs.h

298

avahi = Avahi()

236

299

237

300

class AvahiError(Exception):

238

301

def __init__(self, value, *args, **kwargs):

435

498

.format(self.name)))

436

499

return ret

437

500

501

# Pretend that we have a GnuTLS module

502

class GnuTLS(object):

503

"""This isn't so much a class as it is a module-like namespace.

504

It is instantiated once, and simulates having a GnuTLS module."""

505

506

_library = ctypes.cdll.LoadLibrary(

507

ctypes.util.find_library("gnutls"))

508

_need_version = b"3.3.0"

509

def __init__(self):

510

# Need to use class name "GnuTLS" here, since this method is

511

# called before the assignment to the "gnutls" global variable

512

# happens.

513

if GnuTLS.check_version(self._need_version) is None:

514

raise GnuTLS.Error("Needs GnuTLS {} or later"

515

.format(self._need_version))

516

517

# Unless otherwise indicated, the constants and types below are

518

# all from the gnutls/gnutls.h C header file.

519

520

# Constants

521

E_SUCCESS = 0

522

E_INTERRUPTED = -52

523

E_AGAIN = -28

524

CRT_OPENPGP = 2

525

CLIENT = 2

526

SHUT_RDWR = 0

527

CRD_CERTIFICATE = 1

528

E_NO_CERTIFICATE_FOUND = -49

529

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

530

531

# Types

532

class session_int(ctypes.Structure):

533

_fields_ = []

534

session_t = ctypes.POINTER(session_int)

535

class certificate_credentials_st(ctypes.Structure):

536

_fields_ = []

537

certificate_credentials_t = ctypes.POINTER(

538

certificate_credentials_st)

539

certificate_type_t = ctypes.c_int

540

class datum_t(ctypes.Structure):

541

_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),

542

('size', ctypes.c_uint)]

543

class openpgp_crt_int(ctypes.Structure):

544

_fields_ = []

545

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

546

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

547

log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)

548

credentials_type_t = ctypes.c_int

549

transport_ptr_t = ctypes.c_void_p

550

close_request_t = ctypes.c_int

551

552

# Exceptions

553

class Error(Exception):

554

# We need to use the class name "GnuTLS" here, since this

555

# exception might be raised from within GnuTLS.__init__,

556

# which is called before the assignment to the "gnutls"

557

# global variable has happened.

558

def __init__(self, message = None, code = None, args=()):

559

# Default usage is by a message string, but if a return

560

# code is passed, convert it to a string with

561

# gnutls.strerror()

562

self.code = code

563

if message is None and code is not None:

564

message = GnuTLS.strerror(code)

565

return super(GnuTLS.Error, self).__init__(

566

message, *args)

567

568

class CertificateSecurityError(Error):

569

pass

570

571

# Classes

572

class Credentials(object):

573

def __init__(self):

574

self._c_object = gnutls.certificate_credentials_t()

575

gnutls.certificate_allocate_credentials(

576

ctypes.byref(self._c_object))

577

self.type = gnutls.CRD_CERTIFICATE

578

579

def __del__(self):

580

gnutls.certificate_free_credentials(self._c_object)

581

582

class ClientSession(object):

583

def __init__(self, socket, credentials = None):

584

self._c_object = gnutls.session_t()

585

gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)

586

gnutls.set_default_priority(self._c_object)

587

gnutls.transport_set_ptr(self._c_object, socket.fileno())

588

gnutls.handshake_set_private_extensions(self._c_object,

589

True)

590

self.socket = socket

591

if credentials is None:

592

credentials = gnutls.Credentials()

593

gnutls.credentials_set(self._c_object, credentials.type,

594

ctypes.cast(credentials._c_object,

595

ctypes.c_void_p))

596

self.credentials = credentials

597

598

def __del__(self):

599

gnutls.deinit(self._c_object)

600

601

def handshake(self):

602

return gnutls.handshake(self._c_object)

603

604

def send(self, data):

605

data = bytes(data)

606

data_len = len(data)

607

while data_len > 0:

608

data_len -= gnutls.record_send(self._c_object,

609

data[-data_len:],

610

data_len)

611

612

def bye(self):

613

return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)

614

615

# Error handling functions

616

def _error_code(result):

617

"""A function to raise exceptions on errors, suitable

618

for the 'restype' attribute on ctypes functions"""

619

if result >= 0:

620

return result

621

if result == gnutls.E_NO_CERTIFICATE_FOUND:

622

raise gnutls.CertificateSecurityError(code = result)

623

raise gnutls.Error(code = result)

624

625

def _retry_on_error(result, func, arguments):

626

"""A function to retry on some errors, suitable

627

for the 'errcheck' attribute on ctypes functions"""

628

while result < 0:

629

if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):

630

return _error_code(result)

631

result = func(*arguments)

632

return result

633

634

# Unless otherwise indicated, the function declarations below are

635

# all from the gnutls/gnutls.h C header file.

636

637

# Functions

638

priority_set_direct = _library.gnutls_priority_set_direct

639

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

640

ctypes.POINTER(ctypes.c_char_p)]

641

priority_set_direct.restype = _error_code

642

643

init = _library.gnutls_init

644

init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]

645

init.restype = _error_code

646

647

set_default_priority = _library.gnutls_set_default_priority

648

set_default_priority.argtypes = [session_t]

649

set_default_priority.restype = _error_code

650

651

record_send = _library.gnutls_record_send

652

record_send.argtypes = [session_t, ctypes.c_void_p,

653

ctypes.c_size_t]

654

record_send.restype = ctypes.c_ssize_t

655

record_send.errcheck = _retry_on_error

656

657

certificate_allocate_credentials = (

658

_library.gnutls_certificate_allocate_credentials)

659

certificate_allocate_credentials.argtypes = [

660

ctypes.POINTER(certificate_credentials_t)]

661

certificate_allocate_credentials.restype = _error_code

662

663

certificate_free_credentials = (

664

_library.gnutls_certificate_free_credentials)

665

certificate_free_credentials.argtypes = [certificate_credentials_t]

666

certificate_free_credentials.restype = None

667

668

handshake_set_private_extensions = (

669

_library.gnutls_handshake_set_private_extensions)

670

handshake_set_private_extensions.argtypes = [session_t,

671

ctypes.c_int]

672

handshake_set_private_extensions.restype = None

673

674

credentials_set = _library.gnutls_credentials_set

675

credentials_set.argtypes = [session_t, credentials_type_t,

676

ctypes.c_void_p]

677

credentials_set.restype = _error_code

678

679

strerror = _library.gnutls_strerror

680

strerror.argtypes = [ctypes.c_int]

681

strerror.restype = ctypes.c_char_p

682

683

certificate_type_get = _library.gnutls_certificate_type_get

684

certificate_type_get.argtypes = [session_t]

685

certificate_type_get.restype = _error_code

686

687

certificate_get_peers = _library.gnutls_certificate_get_peers

688

certificate_get_peers.argtypes = [session_t,

689

ctypes.POINTER(ctypes.c_uint)]

690

certificate_get_peers.restype = ctypes.POINTER(datum_t)

691

692

global_set_log_level = _library.gnutls_global_set_log_level

693

global_set_log_level.argtypes = [ctypes.c_int]

694

global_set_log_level.restype = None

695

696

global_set_log_function = _library.gnutls_global_set_log_function

697

global_set_log_function.argtypes = [log_func]

698

global_set_log_function.restype = None

699

700

deinit = _library.gnutls_deinit

701

deinit.argtypes = [session_t]

702

deinit.restype = None

703

704

handshake = _library.gnutls_handshake

705

handshake.argtypes = [session_t]

706

handshake.restype = _error_code

707

handshake.errcheck = _retry_on_error

708

709

transport_set_ptr = _library.gnutls_transport_set_ptr

710

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

711

transport_set_ptr.restype = None

712

713

bye = _library.gnutls_bye

714

bye.argtypes = [session_t, close_request_t]

715

bye.restype = _error_code

716

bye.errcheck = _retry_on_error

717

718

check_version = _library.gnutls_check_version

719

check_version.argtypes = [ctypes.c_char_p]

720

check_version.restype = ctypes.c_char_p

721

722

# All the function declarations below are from gnutls/openpgp.h

723

724

openpgp_crt_init = _library.gnutls_openpgp_crt_init

725

openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]

726

openpgp_crt_init.restype = _error_code

727

728

openpgp_crt_import = _library.gnutls_openpgp_crt_import

729

openpgp_crt_import.argtypes = [openpgp_crt_t,

730

ctypes.POINTER(datum_t),

731

openpgp_crt_fmt_t]

732

openpgp_crt_import.restype = _error_code

733

734

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

735

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

736

ctypes.POINTER(ctypes.c_uint)]

737

openpgp_crt_verify_self.restype = _error_code

738

739

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

740

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

741

openpgp_crt_deinit.restype = None

742

743

openpgp_crt_get_fingerprint = (

744

_library.gnutls_openpgp_crt_get_fingerprint)

745

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

746

ctypes.c_void_p,

747

ctypes.POINTER(

748

ctypes.c_size_t)]

749

openpgp_crt_get_fingerprint.restype = _error_code

750

751

# Remove non-public functions

752

del _error_code, _retry_on_error

753

# Create the global "gnutls" object, simulating a module

754

gnutls = GnuTLS()

755

438

756

def call_pipe(connection, # : multiprocessing.Connection

439

757

func, *args, **kwargs):

440

758

"""This function is meant to be called by multiprocessing.Process

455

773

checker: subprocess.Popen(); a running checker process used

456

774

to see if the client lives.

457

775

'None' if no process is running.

458

checker_callback_tag: a gobject event source tag, or None

776

checker_callback_tag: a GLib event source tag, or None

459

777

checker_command: string; External command which is run to check

460

778

if client lives. %() expansions are done at

461

779

runtime with vars(self) as dict, so that for

462

780

instance %(name)s can be used in the command.

463

checker_initiator_tag: a gobject event source tag, or None

781

checker_initiator_tag: a GLib event source tag, or None

464

782

created: datetime.datetime(); (UTC) object creation

465

783

client_structure: Object describing what attributes a client has

466

784

and is used for storing the client at exit

467

785

current_checker_command: string; current running checker_command

468

disable_initiator_tag: a gobject event source tag, or None

786

disable_initiator_tag: a GLib event source tag, or None

469

787

enabled: bool()

470

788

fingerprint: string (40 or 32 hexadecimal digits); used to

471

789

uniquely identify the client

534

852

client["fingerprint"] = (section["fingerprint"].upper()

535

853

.replace(" ", ""))

536

854

if "secret" in section:

537

client["secret"] = section["secret"].decode("base64")

855

client["secret"] = codecs.decode(section["secret"]

856

.encode("utf-8"),

857

"base64")

538

858

elif "secfile" in section:

539

859

with open(os.path.expanduser(os.path.expandvars

540

860

(section["secfile"])),

593

913

self.changedstate = multiprocessing_manager.Condition(

594

914

multiprocessing_manager.Lock())

595

915

self.client_structure = [attr

596

for attr in self.__dict__.iterkeys()

916

for attr in self.__dict__.keys()

597

917

if not attr.startswith("_")]

598

918

self.client_structure.append("client_structure")

599

919

625

945

if not quiet:

626

946

logger.info("Disabling client %s", self.name)

627

947

if getattr(self, "disable_initiator_tag", None) is not None:

628

gobject.source_remove(self.disable_initiator_tag)

948

GLib.source_remove(self.disable_initiator_tag)

629

949

self.disable_initiator_tag = None

630

950

self.expires = None

631

951

if getattr(self, "checker_initiator_tag", None) is not None:

632

gobject.source_remove(self.checker_initiator_tag)

952

GLib.source_remove(self.checker_initiator_tag)

633

953

self.checker_initiator_tag = None

634

954

self.stop_checker()

635

955

self.enabled = False

636

956

if not quiet:

637

957

self.send_changedstate()

638

# Do not run this again if called by a gobject.timeout_add

958

# Do not run this again if called by a GLib.timeout_add

639

959

return False

640

960

641

961

def __del__(self):

645

965

# Schedule a new checker to be started an 'interval' from now,

646

966

# and every interval from then on.

647

967

if self.checker_initiator_tag is not None:

648

gobject.source_remove(self.checker_initiator_tag)

649

self.checker_initiator_tag = gobject.timeout_add(

968

GLib.source_remove(self.checker_initiator_tag)

969

self.checker_initiator_tag = GLib.timeout_add(

650

970

int(self.interval.total_seconds() * 1000),

651

971

self.start_checker)

652

972

# Schedule a disable() when 'timeout' has passed

653

973

if self.disable_initiator_tag is not None:

654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = gobject.timeout_add(

974

GLib.source_remove(self.disable_initiator_tag)

975

self.disable_initiator_tag = GLib.timeout_add(

656

976

int(self.timeout.total_seconds() * 1000), self.disable)

657

977

# Also start a new checker *right now*.

658

978

self.start_checker()

694

1014

if timeout is None:

695

1015

timeout = self.timeout

696

1016

if self.disable_initiator_tag is not None:

697

gobject.source_remove(self.disable_initiator_tag)

1017

GLib.source_remove(self.disable_initiator_tag)

698

1018

self.disable_initiator_tag = None

699

1019

if getattr(self, "enabled", False):

700

self.disable_initiator_tag = gobject.timeout_add(

1020

self.disable_initiator_tag = GLib.timeout_add(

701

1021

int(timeout.total_seconds() * 1000), self.disable)

702

1022

self.expires = datetime.datetime.utcnow() + timeout

703

1023

758

1078

args = (pipe[1], subprocess.call, command),

759

1079

kwargs = popen_args)

760

1080

self.checker.start()

761

self.checker_callback_tag = gobject.io_add_watch(

762

pipe[0].fileno(), gobject.IO_IN,

1081

self.checker_callback_tag = GLib.io_add_watch(

1082

pipe[0].fileno(), GLib.IO_IN,

763

1083

self.checker_callback, pipe[0], command)

764

# Re-run this periodically if run by gobject.timeout_add

1084

# Re-run this periodically if run by GLib.timeout_add

765

1085

return True

766

1086

767

1087

def stop_checker(self):

768

1088

"""Force the checker process, if any, to stop."""

769

1089

if self.checker_callback_tag:

770

gobject.source_remove(self.checker_callback_tag)

1090

GLib.source_remove(self.checker_callback_tag)

771

1091

self.checker_callback_tag = None

772

1092

if getattr(self, "checker", None) is None:

773

1093

return

842

1162

access="r")

843

1163

def Property_dbus_property(self):

844

1164

return dbus.Boolean(False)

1165

1166

See also the DBusObjectWithAnnotations class.

845

1167

"""

846

1168

847

1169

def decorator(func):

869

1191

pass

870

1192

871

1193

872

class DBusObjectWithProperties(dbus.service.Object):

873

"""A D-Bus object with properties.

1194

class DBusObjectWithAnnotations(dbus.service.Object):

1195

"""A D-Bus object with annotations.

874

1196

875

Classes inheriting from this can use the dbus_service_property

876

decorator to expose methods as D-Bus properties. It exposes the

877

standard Get(), Set(), and GetAll() methods on the D-Bus.

1197

Classes inheriting from this can use the dbus_annotations

1198

decorator to add annotations to methods or signals.

878

1199

"""

879

1200

880

1201

@staticmethod

896

1217

for name, athing in

897

1218

inspect.getmembers(cls, self._is_dbus_thing(thing)))

898

1219

1220

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1221

out_signature = "s",

1222

path_keyword = 'object_path',

1223

connection_keyword = 'connection')

1224

def Introspect(self, object_path, connection):

1225

"""Overloading of standard D-Bus method.

1226

1227

Inserts annotation tags on methods and signals.

1228

"""

1229

xmlstring = dbus.service.Object.Introspect(self, object_path,

1230

connection)

1231

try:

1232

document = xml.dom.minidom.parseString(xmlstring)

1233

1234

for if_tag in document.getElementsByTagName("interface"):

1235

# Add annotation tags

1236

for typ in ("method", "signal"):

1237

for tag in if_tag.getElementsByTagName(typ):

1238

annots = dict()

1239

for name, prop in (self.

1240

_get_all_dbus_things(typ)):

1241

if (name == tag.getAttribute("name")

1242

and prop._dbus_interface

1243

== if_tag.getAttribute("name")):

1244

annots.update(getattr(

1245

prop, "_dbus_annotations", {}))

1246

for name, value in annots.items():

1247

ann_tag = document.createElement(

1248

"annotation")

1249

ann_tag.setAttribute("name", name)

1250

ann_tag.setAttribute("value", value)

1251

tag.appendChild(ann_tag)

1252

# Add interface annotation tags

1253

for annotation, value in dict(

1254

itertools.chain.from_iterable(

1255

annotations().items()

1256

for name, annotations

1257

in self._get_all_dbus_things("interface")

1258

if name == if_tag.getAttribute("name")

1259

)).items():

1260

ann_tag = document.createElement("annotation")

1261

ann_tag.setAttribute("name", annotation)

1262

ann_tag.setAttribute("value", value)

1263

if_tag.appendChild(ann_tag)

1264

# Fix argument name for the Introspect method itself

1265

if (if_tag.getAttribute("name")

1266

== dbus.INTROSPECTABLE_IFACE):

1267

for cn in if_tag.getElementsByTagName("method"):

1268

if cn.getAttribute("name") == "Introspect":

1269

for arg in cn.getElementsByTagName("arg"):

1270

if (arg.getAttribute("direction")

1271

== "out"):

1272

arg.setAttribute("name",

1273

"xml_data")

1274

xmlstring = document.toxml("utf-8")

1275

document.unlink()

1276

except (AttributeError, xml.dom.DOMException,

1277

xml.parsers.expat.ExpatError) as error:

1278

logger.error("Failed to override Introspection method",

1279

exc_info=error)

1280

return xmlstring

1281

1282

1283

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1284

"""A D-Bus object with properties.

1285

1286

Classes inheriting from this can use the dbus_service_property

1287

decorator to expose methods as D-Bus properties. It exposes the

1288

standard Get(), Set(), and GetAll() methods on the D-Bus.

1289

"""

1290

899

1291

def _get_dbus_property(self, interface_name, property_name):

900

1292

"""Returns a bound method if one exists which is a D-Bus

901

1293

property with the specified name and interface.

911

1303

raise DBusPropertyNotFound("{}:{}.{}".format(

912

1304

self.dbus_object_path, interface_name, property_name))

913

1305

1306

@classmethod

1307

def _get_all_interface_names(cls):

1308

"""Get a sequence of all interfaces supported by an object"""

1309

return (name for name in set(getattr(getattr(x, attr),

1310

"_dbus_interface", None)

1311

for x in (inspect.getmro(cls))

1312

for attr in dir(x))

1313

if name is not None)

1314

914

1315

@dbus.service.method(dbus.PROPERTIES_IFACE,

915

1316

in_signature="ss",

916

1317

out_signature="v")

986

1387

987

1388

Inserts property tags and interface annotation tags.

988

1389

"""

989

xmlstring = dbus.service.Object.Introspect(self, object_path,

990

connection)

1390

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1391

object_path,

1392

connection)

991

1393

try:

992

1394

document = xml.dom.minidom.parseString(xmlstring)

993

1395

1006

1408

if prop._dbus_interface

1007

1409

== if_tag.getAttribute("name")):

1008

1410

if_tag.appendChild(tag)

1009

# Add annotation tags

1010

for typ in ("method", "signal", "property"):

1011

for tag in if_tag.getElementsByTagName(typ):

1012

annots = dict()

1013

for name, prop in (self.

1014

_get_all_dbus_things(typ)):

1015

if (name == tag.getAttribute("name")

1016

and prop._dbus_interface

1017

== if_tag.getAttribute("name")):

1018

annots.update(getattr(

1019

prop, "_dbus_annotations", {}))

1020

for name, value in annots.items():

1021

ann_tag = document.createElement(

1022

"annotation")

1023

ann_tag.setAttribute("name", name)

1024

ann_tag.setAttribute("value", value)

1025

tag.appendChild(ann_tag)

1026

# Add interface annotation tags

1027

for annotation, value in dict(

1028

itertools.chain.from_iterable(

1029

annotations().items()

1030

for name, annotations

1031

in self._get_all_dbus_things("interface")

1032

if name == if_tag.getAttribute("name")

1033

)).items():

1034

ann_tag = document.createElement("annotation")

1035

ann_tag.setAttribute("name", annotation)

1036

ann_tag.setAttribute("value", value)

1037

if_tag.appendChild(ann_tag)

1411

# Add annotation tags for properties

1412

for tag in if_tag.getElementsByTagName("property"):

1413

annots = dict()

1414

for name, prop in self._get_all_dbus_things(

1415

"property"):

1416

if (name == tag.getAttribute("name")

1417

and prop._dbus_interface

1418

== if_tag.getAttribute("name")):

1419

annots.update(getattr(

1420

prop, "_dbus_annotations", {}))

1421

for name, value in annots.items():

1422

ann_tag = document.createElement(

1423

"annotation")

1424

ann_tag.setAttribute("name", name)

1425

ann_tag.setAttribute("value", value)

1426

tag.appendChild(ann_tag)

1038

1427

# Add the names to the return values for the

1039

1428

# "org.freedesktop.DBus.Properties" methods

1040

1429

if (if_tag.getAttribute("name")

1058

1447

exc_info=error)

1059

1448

return xmlstring

1060

1449

1450

try:

1451

dbus.OBJECT_MANAGER_IFACE

1452

except AttributeError:

1453

dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"

1454

1455

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1456

"""A D-Bus object with an ObjectManager.

1457

1458

Classes inheriting from this exposes the standard

1459

GetManagedObjects call and the InterfacesAdded and

1460

InterfacesRemoved signals on the standard

1461

"org.freedesktop.DBus.ObjectManager" interface.

1462

1463

Note: No signals are sent automatically; they must be sent

1464

manually.

1465

"""

1466

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1467

out_signature = "a{oa{sa{sv}}}")

1468

def GetManagedObjects(self):

1469

"""This function must be overridden"""

1470

raise NotImplementedError()

1471

1472

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1473

signature = "oa{sa{sv}}")

1474

def InterfacesAdded(self, object_path, interfaces_and_properties):

1475

pass

1476

1477

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")

1478

def InterfacesRemoved(self, object_path, interfaces):

1479

pass

1480

1481

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1482

out_signature = "s",

1483

path_keyword = 'object_path',

1484

connection_keyword = 'connection')

1485

def Introspect(self, object_path, connection):

1486

"""Overloading of standard D-Bus method.

1487

1488

Override return argument name of GetManagedObjects to be

1489

"objpath_interfaces_and_properties"

1490

"""

1491

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1492

object_path,

1493

connection)

1494

try:

1495

document = xml.dom.minidom.parseString(xmlstring)

1496

1497

for if_tag in document.getElementsByTagName("interface"):

1498

# Fix argument name for the GetManagedObjects method

1499

if (if_tag.getAttribute("name")

1500

== dbus.OBJECT_MANAGER_IFACE):

1501

for cn in if_tag.getElementsByTagName("method"):

1502

if (cn.getAttribute("name")

1503

== "GetManagedObjects"):

1504

for arg in cn.getElementsByTagName("arg"):

1505

if (arg.getAttribute("direction")

1506

== "out"):

1507

arg.setAttribute(

1508

"name",

1509

"objpath_interfaces"

1510

"_and_properties")

1511

xmlstring = document.toxml("utf-8")

1512

document.unlink()

1513

except (AttributeError, xml.dom.DOMException,

1514

xml.parsers.expat.ExpatError) as error:

1515

logger.error("Failed to override Introspection method",

1516

exc_info = error)

1517

return xmlstring

1061

1518

1062

1519

def datetime_to_dbus(dt, variant_level=0):

1063

1520

"""Convert a UTC datetime.datetime() to a D-Bus type."""

1110

1567

interface_names.add(alt_interface)

1111

1568

# Is this a D-Bus signal?

1112

1569

if getattr(attribute, "_dbus_is_signal", False):

1570

# Extract the original non-method undecorated

1571

# function by black magic

1113

1572

if sys.version_info.major == 2:

1114

# Extract the original non-method undecorated

1115

# function by black magic

1116

1573

nonmethod_func = (dict(

1117

1574

zip(attribute.func_code.co_freevars,

1118

1575

attribute.__closure__))

1119

1576

["func"].cell_contents)

1120

1577

else:

1121

nonmethod_func = attribute

1578

nonmethod_func = (dict(

1579

zip(attribute.__code__.co_freevars,

1580

attribute.__closure__))

1581

["func"].cell_contents)

1122

1582

# Create a new, but exactly alike, function

1123

1583

# object, and decorate it to be a new D-Bus signal

1124

1584

# with the alternate D-Bus interface name

1125

if sys.version_info.major == 2:

1126

new_function = types.FunctionType(

1127

nonmethod_func.func_code,

1128

nonmethod_func.func_globals,

1129

nonmethod_func.func_name,

1130

nonmethod_func.func_defaults,

1131

nonmethod_func.func_closure)

1132

else:

1133

new_function = types.FunctionType(

1134

nonmethod_func.__code__,

1135

nonmethod_func.__globals__,

1136

nonmethod_func.__name__,

1137

nonmethod_func.__defaults__,

1138

nonmethod_func.__closure__)

1585

new_function = copy_function(nonmethod_func)

1139

1586

new_function = (dbus.service.signal(

1140

1587

alt_interface,

1141

1588

attribute._dbus_signature)(new_function))

1154

1601

func1 and func2 to the "call_both" function

1155

1602

outside of its arguments"""

1156

1603

1604

@functools.wraps(func2)

1157

1605

def call_both(*args, **kwargs):

1158

1606

"""This function will emit two D-Bus

1159

1607

signals by calling func1 and func2"""

1160

1608

func1(*args, **kwargs)

1161

1609

func2(*args, **kwargs)

1610

# Make wrapper function look like a D-Bus signal

1611

for name, attr in inspect.getmembers(func2):

1612

if name.startswith("_dbus_"):

1613

setattr(call_both, name, attr)

1162

1614

1163

1615

return call_both

1164

1616

# Create the "call_both" function and add it to

1175

1627

alt_interface,

1176

1628

attribute._dbus_in_signature,

1177

1629

attribute._dbus_out_signature)

1178

(types.FunctionType(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1630

(copy_function(attribute)))

1183

1631

# Copy annotations, if any

1184

1632

try:

1185

1633

attr[attrname]._dbus_annotations = dict(

1197

1645

attribute._dbus_access,

1198

1646

attribute._dbus_get_args_options

1199

1647

["byte_arrays"])

1200

(types.FunctionType(

1201

attribute.func_code,

1202

attribute.func_globals,

1203

attribute.func_name,

1204

attribute.func_defaults,

1205

attribute.func_closure)))

1648

(copy_function(attribute)))

1206

1649

# Copy annotations, if any

1207

1650

try:

1208

1651

attr[attrname]._dbus_annotations = dict(

1217

1660

# to the class.

1218

1661

attr[attrname] = (

1219

1662

dbus_interface_annotations(alt_interface)

1220

(types.FunctionType(attribute.func_code,

1221

attribute.func_globals,

1222

attribute.func_name,

1223

attribute.func_defaults,

1224

attribute.func_closure)))

1663

(copy_function(attribute)))

1225

1664

if deprecate:

1226

1665

# Deprecate all alternate interfaces

1227

1666

iname="_AlternateDBusNames_interface_annotation{}"

1240

1679

if interface_names:

1241

1680

# Replace the class with a new subclass of it with

1242

1681

# methods, signals, etc. as created above.

1243

cls = type(b"{}Alternate".format(cls.__name__),

1244

(cls, ), attr)

1682

if sys.version_info.major == 2:

1683

cls = type(b"{}Alternate".format(cls.__name__),

1684

(cls, ), attr)

1685

else:

1686

cls = type("{}Alternate".format(cls.__name__),

1687

(cls, ), attr)

1245

1688

return cls

1246

1689

1247

1690

return wrapper

1376

1819

if exitstatus >= 0:

1377

1820

# Emit D-Bus signal

1378

1821

self.CheckerCompleted(dbus.Int16(exitstatus),

1379

dbus.Int64(0),

1822

# This is specific to GNU libC

1823

dbus.Int64(exitstatus << 8),

1380

1824

dbus.String(command))

1381

1825

else:

1382

1826

# Emit D-Bus signal

1383

1827

self.CheckerCompleted(dbus.Int16(-1),

1384

1828

dbus.Int64(

1385

self.last_checker_signal),

1829

# This is specific to GNU libC

1830

(exitstatus << 8)

1831

| self.last_checker_signal),

1386

1832

dbus.String(command))

1387

1833

return ret

1388

1834

1402

1848

1403

1849

def approve(self, value=True):

1404

1850

self.approved = value

1405

gobject.timeout_add(int(self.approval_duration.total_seconds()

1406

* 1000), self._reset_approved)

1851

GLib.timeout_add(int(self.approval_duration.total_seconds()

1852

* 1000), self._reset_approved)

1407

1853

self.send_changedstate()

1408

1854

1409

1855

## D-Bus methods, signals & properties

1465

1911

self.checked_ok()

1466

1912

1467

1913

# Enable - method

1914

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1468

1915

@dbus.service.method(_interface)

1469

1916

def Enable(self):

1470

1917

"D-Bus method"

1471

1918

self.enable()

1472

1919

1473

1920

# StartChecker - method

1921

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1474

1922

@dbus.service.method(_interface)

1475

1923

def StartChecker(self):

1476

1924

"D-Bus method"

1477

1925

self.start_checker()

1478

1926

1479

1927

# Disable - method

1928

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1480

1929

@dbus.service.method(_interface)

1481

1930

def Disable(self):

1482

1931

"D-Bus method"

1483

1932

self.disable()

1484

1933

1485

1934

# StopChecker - method

1935

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1486

1936

@dbus.service.method(_interface)

1487

1937

def StopChecker(self):

1488

1938

self.stop_checker()

1524

1974

self.approval_duration = datetime.timedelta(0, 0, 0, value)

1525

1975

1526

1976

# Name - property

1977

@dbus_annotations(

1978

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1527

1979

@dbus_service_property(_interface, signature="s", access="read")

1528

1980

def Name_dbus_property(self):

1529

1981

return dbus.String(self.name)

1530

1982

1531

1983

# Fingerprint - property

1984

@dbus_annotations(

1985

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1532

1986

@dbus_service_property(_interface, signature="s", access="read")

1533

1987

def Fingerprint_dbus_property(self):

1534

1988

return dbus.String(self.fingerprint)

1543

1997

self.host = str(value)

1544

1998

1545

1999

# Created - property

2000

@dbus_annotations(

2001

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1546

2002

@dbus_service_property(_interface, signature="s", access="read")

1547

2003

def Created_dbus_property(self):

1548

2004

return datetime_to_dbus(self.created)

1609

2065

if (getattr(self, "disable_initiator_tag", None)

1610

2066

is None):

1611

2067

return

1612

gobject.source_remove(self.disable_initiator_tag)

1613

self.disable_initiator_tag = gobject.timeout_add(

2068

GLib.source_remove(self.disable_initiator_tag)

2069

self.disable_initiator_tag = GLib.timeout_add(

1614

2070

int((self.expires - now).total_seconds() * 1000),

1615

2071

self.disable)

1616

2072

1636

2092

return

1637

2093

if self.enabled:

1638

2094

# Reschedule checker run

1639

gobject.source_remove(self.checker_initiator_tag)

1640

self.checker_initiator_tag = gobject.timeout_add(

2095

GLib.source_remove(self.checker_initiator_tag)

2096

self.checker_initiator_tag = GLib.timeout_add(

1641

2097

value, self.start_checker)

1642

2098

self.start_checker() # Start one now, too

1643

2099

1663

2119

self.stop_checker()

1664

2120

1665

2121

# ObjectPath - property

2122

@dbus_annotations(

2123

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",

2124

"org.freedesktop.DBus.Deprecated": "true"})

1666

2125

@dbus_service_property(_interface, signature="o", access="read")

1667

2126

def ObjectPath_dbus_property(self):

1668

2127

return self.dbus_object_path # is already a dbus.ObjectPath

1669

2128

1670

2129

# Secret = property

2130

@dbus_annotations(

2131

{"org.freedesktop.DBus.Property.EmitsChangedSignal":

2132

"invalidates"})

1671

2133

@dbus_service_property(_interface,

1672

2134

signature="ay",

1673

2135

access="write",

1719

2181

logger.debug("Pipe FD: %d",

1720

2182

self.server.child_pipe.fileno())

1721

2183

1722

session = gnutls.connection.ClientSession(

1723

self.request, gnutls.connection .X509Credentials())

1724

1725

# Note: gnutls.connection.X509Credentials is really a

1726

# generic GnuTLS certificate credentials object so long as

1727

# no X.509 keys are added to it. Therefore, we can use it

1728

# here despite using OpenPGP certificates.

2184

session = gnutls.ClientSession(self.request)

1729

2185

1730

2186

#priority = ':'.join(("NONE", "+VERS-TLS1.1",

1731

2187

# "+AES-256-CBC", "+SHA1",

1735

2191

priority = self.server.gnutls_priority

1736

2192

if priority is None:

1737

2193

priority = "NORMAL"

1738

gnutls.library.functions.gnutls_priority_set_direct(

1739

session._c_object, priority, None)

2194

gnutls.priority_set_direct(session._c_object,

2195

priority.encode("utf-8"),

2196

None)

1740

2197

1741

2198

# Start communication using the Mandos protocol

1742

2199

# Get protocol number

1752

2209

# Start GnuTLS connection

1753

2210

try:

1754

2211

session.handshake()

1755

except gnutls.errors.GNUTLSError as error:

2212

except gnutls.Error as error:

1756

2213

logger.warning("Handshake failed: %s", error)

1757

2214

# Do not run session.bye() here: the session is not

1758

2215

# established. Just abandon the request.

1764

2221

try:

1765

2222

fpr = self.fingerprint(

1766

2223

self.peer_certificate(session))

1767

except (TypeError,

1768

gnutls.errors.GNUTLSError) as error:

2224

except (TypeError, gnutls.Error) as error:

1769

2225

logger.warning("Bad certificate: %s", error)

1770

2226

return

1771

2227

logger.debug("Fingerprint: %s", fpr)

1829

2285

else:

1830

2286

delay -= time2 - time

1831

2287

1832

sent_size = 0

1833

while sent_size < len(client.secret):

1834

try:

1835

sent = session.send(client.secret[sent_size:])

1836

except gnutls.errors.GNUTLSError as error:

1837

logger.warning("gnutls send failed",

1838

exc_info=error)

1839

return

1840

logger.debug("Sent: %d, remaining: %d", sent,

1841

len(client.secret) - (sent_size

1842

+ sent))

1843

sent_size += sent

2288

try:

2289

session.send(client.secret)

2290

except gnutls.Error as error:

2291

logger.warning("gnutls send failed",

2292

exc_info = error)

2293

return

1844

2294

1845

2295

logger.info("Sending secret to %s", client.name)

1846

2296

# bump the timeout using extended_timeout

1854

2304

client.approvals_pending -= 1

1855

2305

try:

1856

2306

session.bye()

1857

except gnutls.errors.GNUTLSError as error:

2307

except gnutls.Error as error:

1858

2308

logger.warning("GnuTLS bye failed",

1859

2309

exc_info=error)

1860

2310

1862

2312

def peer_certificate(session):

1863

2313

"Return the peer's OpenPGP certificate as a bytestring"

1864

2314

# If not an OpenPGP certificate...

1865

if (gnutls.library.functions.gnutls_certificate_type_get(

1866

session._c_object)

1867

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1868

# ...do the normal thing

1869

return session.peer_certificate

2315

if (gnutls.certificate_type_get(session._c_object)

2316

!= gnutls.CRT_OPENPGP):

2317

# ...return invalid data

2318

return b""

1870

2319

list_size = ctypes.c_uint(1)

1871

cert_list = (gnutls.library.functions

1872

.gnutls_certificate_get_peers

2320

cert_list = (gnutls.certificate_get_peers

1873

2321

(session._c_object, ctypes.byref(list_size)))

1874

2322

if not bool(cert_list) and list_size.value != 0:

1875

raise gnutls.errors.GNUTLSError("error getting peer"

1876

" certificate")

2323

raise gnutls.Error("error getting peer certificate")

1877

2324

if list_size.value == 0:

1878

2325

return None

1879

2326

cert = cert_list[0]

1883

2330

def fingerprint(openpgp):

1884

2331

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1885

2332

# New GnuTLS "datum" with the OpenPGP public key

1886

datum = gnutls.library.types.gnutls_datum_t(

2333

datum = gnutls.datum_t(

1887

2334

ctypes.cast(ctypes.c_char_p(openpgp),

1888

2335

ctypes.POINTER(ctypes.c_ubyte)),

1889

2336

ctypes.c_uint(len(openpgp)))

1890

2337

# New empty GnuTLS certificate

1891

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1892

gnutls.library.functions.gnutls_openpgp_crt_init(

1893

ctypes.byref(crt))

2338

crt = gnutls.openpgp_crt_t()

2339

gnutls.openpgp_crt_init(ctypes.byref(crt))

1894

2340

# Import the OpenPGP public key into the certificate

1895

gnutls.library.functions.gnutls_openpgp_crt_import(

1896

crt, ctypes.byref(datum),

1897

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

2341

gnutls.openpgp_crt_import(crt, ctypes.byref(datum),

2342

gnutls.OPENPGP_FMT_RAW)

1898

2343

# Verify the self signature in the key

1899

2344

crtverify = ctypes.c_uint()

1900

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1901

crt, 0, ctypes.byref(crtverify))

2345

gnutls.openpgp_crt_verify_self(crt, 0,

2346

ctypes.byref(crtverify))

1902

2347

if crtverify.value != 0:

1903

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1904

raise gnutls.errors.CertificateSecurityError(

1905

"Verify failed")

2348

gnutls.openpgp_crt_deinit(crt)

2349

raise gnutls.CertificateSecurityError("Verify failed")

1906

2350

# New buffer for the fingerprint

1907

2351

buf = ctypes.create_string_buffer(20)

1908

2352

buf_len = ctypes.c_size_t()

1909

2353

# Get the fingerprint from the certificate into the buffer

1910

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1911

crt, ctypes.byref(buf), ctypes.byref(buf_len))

2354

gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),

2355

ctypes.byref(buf_len))

1912

2356

# Deinit the certificate

1913

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2357

gnutls.openpgp_crt_deinit(crt)

1914

2358

# Convert the buffer to a Python bytestring

1915

2359

fpr = ctypes.string_at(buf, buf_len.value)

1916

2360

# Convert the bytestring to hexadecimal notation

2009

2453

"""This overrides the normal server_bind() function

2010

2454

to bind to an interface if one was specified, and also NOT to

2011

2455

bind to an address or port if they were not specified."""

2456

global SO_BINDTODEVICE

2012

2457

if self.interface is not None:

2013

2458

if SO_BINDTODEVICE is None:

2014

logger.error("SO_BINDTODEVICE does not exist;"

2015

" cannot bind to interface %s",

2016

self.interface)

2017

else:

2018

try:

2019

self.socket.setsockopt(

2020

socket.SOL_SOCKET, SO_BINDTODEVICE,

2021

(self.interface + "\0").encode("utf-8"))

2022

except socket.error as error:

2023

if error.errno == errno.EPERM:

2024

logger.error("No permission to bind to"

2025

" interface %s", self.interface)

2026

elif error.errno == errno.ENOPROTOOPT:

2027

logger.error("SO_BINDTODEVICE not available;"

2028

" cannot bind to interface %s",

2029

self.interface)

2030

elif error.errno == errno.ENODEV:

2031

logger.error("Interface %s does not exist,"

2032

" cannot bind", self.interface)

2033

else:

2034

raise

2459

# Fall back to a hard-coded value which seems to be

2460

# common enough.

2461

logger.warning("SO_BINDTODEVICE not found, trying 25")

2462

SO_BINDTODEVICE = 25

2463

try:

2464

self.socket.setsockopt(

2465

socket.SOL_SOCKET, SO_BINDTODEVICE,

2466

(self.interface + "\0").encode("utf-8"))

2467

except socket.error as error:

2468

if error.errno == errno.EPERM:

2469

logger.error("No permission to bind to"

2470

" interface %s", self.interface)

2471

elif error.errno == errno.ENOPROTOOPT:

2472

logger.error("SO_BINDTODEVICE not available;"

2473

" cannot bind to interface %s",

2474

self.interface)

2475

elif error.errno == errno.ENODEV:

2476

logger.error("Interface %s does not exist,"

2477

" cannot bind", self.interface)

2478

else:

2479

raise

2035

2480

# Only bind(2) the socket if we really need to.

2036

2481

if self.server_address[0] or self.server_address[1]:

2037

2482

if not self.server_address[0]:

2060

2505

gnutls_priority GnuTLS priority string

2061

2506

use_dbus: Boolean; to emit D-Bus signals or not

2062

2507

2063

Assumes a gobject.MainLoop event loop.

2508

Assumes a GLib.MainLoop event loop.

2064

2509

"""

2065

2510

2066

2511

def __init__(self, server_address, RequestHandlerClass,

2091

2536

2092

2537

def add_pipe(self, parent_pipe, proc):

2093

2538

# Call "handle_ipc" for both data and EOF events

2094

gobject.io_add_watch(

2539

GLib.io_add_watch(

2095

2540

parent_pipe.fileno(),

2096

gobject.IO_IN | gobject.IO_HUP,

2541

GLib.IO_IN | GLib.IO_HUP,

2097

2542

functools.partial(self.handle_ipc,

2098

2543

parent_pipe = parent_pipe,

2099

2544

proc = proc))

2103

2548

proc = None,

2104

2549

client_object=None):

2105

2550

# error, or the other end of multiprocessing.Pipe has closed

2106

if condition & (gobject.IO_ERR | gobject.IO_HUP):

2551

if condition & (GLib.IO_ERR | GLib.IO_HUP):

2107

2552

# Wait for other process to exit

2108

2553

proc.join()

2109

2554

return False

2116

2561

fpr = request[1]

2117

2562

address = request[2]

2118

2563

2119

for c in self.clients.itervalues():

2564

for c in self.clients.values():

2120

2565

if c.fingerprint == fpr:

2121

2566

client = c

2122

2567

break

2130

2575

parent_pipe.send(False)

2131

2576

return False

2132

2577

2133

gobject.io_add_watch(

2578

GLib.io_add_watch(

2134

2579

parent_pipe.fileno(),

2135

gobject.IO_IN | gobject.IO_HUP,

2580

GLib.IO_IN | GLib.IO_HUP,

2136

2581

functools.partial(self.handle_ipc,

2137

2582

parent_pipe = parent_pipe,

2138

2583

proc = proc,

2520

2965

logger.error("Could not open file %r", pidfilename,

2521

2966

exc_info=e)

2522

2967

2523

for name in ("_mandos", "mandos", "nobody"):

2968

for name, group in (("_mandos", "_mandos"),

2969

("mandos", "mandos"),

2970

("nobody", "nogroup")):

2524

2971

try:

2525

2972

uid = pwd.getpwnam(name).pw_uid

2526

gid = pwd.getpwnam(name).pw_gid

2973

gid = pwd.getpwnam(group).pw_gid

2527

2974

break

2528

2975

except KeyError:

2529

2976

continue

2533

2980

try:

2534

2981

os.setgid(gid)

2535

2982

os.setuid(uid)

2983

if debug:

2984

logger.debug("Did setuid/setgid to {}:{}".format(uid,

2985

gid))

2536

2986

except OSError as error:

2987

logger.warning("Failed to setuid/setgid to {}:{}: {}"

2988

.format(uid, gid, os.strerror(error.errno)))

2537

2989

if error.errno != errno.EPERM:

2538

2990

raise

2539

2991

2542

2994

2543

2995

# "Use a log level over 10 to enable all debugging options."

2544

2996

# - GnuTLS manual

2545

gnutls.library.functions.gnutls_global_set_log_level(11)

2997

gnutls.global_set_log_level(11)

2546

2998

2547

@gnutls.library.types.gnutls_log_func

2999

@gnutls.log_func

2548

3000

def debug_gnutls(level, string):

2549

3001

logger.debug("GnuTLS: %s", string[:-1])

2550

3002

2551

gnutls.library.functions.gnutls_global_set_log_function(

2552

debug_gnutls)

3003

gnutls.global_set_log_function(debug_gnutls)

2553

3004

2554

3005

# Redirect stdin so all checkers get /dev/null

2555

3006

null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)

2562

3013

# Close all input and output, do double fork, etc.

2563

3014

daemon()

2564

3015

2565

# multiprocessing will use threads, so before we use gobject we

2566

# need to inform gobject that threads will be used.

2567

gobject.threads_init()

3016

# multiprocessing will use threads, so before we use GLib we need

3017

# to inform GLib that threads will be used.

3018

GLib.threads_init()

2568

3019

2569

3020

global main_loop

2570

3021

# From the Avahi example code

2571

3022

DBusGMainLoop(set_as_default=True)

2572

main_loop = gobject.MainLoop()

3023

main_loop = GLib.MainLoop()

2573

3024

bus = dbus.SystemBus()

2574

3025

# End of Avahi example code

2575

3026

if use_dbus:

2619

3070

if server_settings["restore"]:

2620

3071

try:

2621

3072

with open(stored_state_path, "rb") as stored_state:

2622

clients_data, old_client_settings = pickle.load(

2623

stored_state)

3073

if sys.version_info.major == 2:

3074

clients_data, old_client_settings = pickle.load(

3075

stored_state)

3076

else:

3077

bytes_clients_data, bytes_old_client_settings = (

3078

pickle.load(stored_state, encoding = "bytes"))

3079

### Fix bytes to strings

3080

## clients_data

3081

# .keys()

3082

clients_data = { (key.decode("utf-8")

3083

if isinstance(key, bytes)

3084

else key): value

3085

for key, value in

3086

bytes_clients_data.items() }

3087

del bytes_clients_data

3088

for key in clients_data:

3089

value = { (k.decode("utf-8")

3090

if isinstance(k, bytes) else k): v

3091

for k, v in

3092

clients_data[key].items() }

3093

clients_data[key] = value

3094

# .client_structure

3095

value["client_structure"] = [

3096

(s.decode("utf-8")

3097

if isinstance(s, bytes)

3098

else s) for s in

3099

value["client_structure"] ]

3100

# .name & .host

3101

for k in ("name", "host"):

3102

if isinstance(value[k], bytes):

3103

value[k] = value[k].decode("utf-8")

3104

## old_client_settings

3105

# .keys()

3106

old_client_settings = {

3107

(key.decode("utf-8")

3108

if isinstance(key, bytes)

3109

else key): value

3110

for key, value in

3111

bytes_old_client_settings.items() }

3112

del bytes_old_client_settings

3113

# .host

3114

for value in old_client_settings.values():

3115

if isinstance(value["host"], bytes):

3116

value["host"] = (value["host"]

3117

.decode("utf-8"))

2624

3118

os.remove(stored_state_path)

2625

3119

except IOError as e:

2626

3120

if e.errno == errno.ENOENT:

2727

3221

del pidfile

2728

3222

del pidfilename

2729

3223

2730

signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())

2731

signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())

3224

for termsig in (signal.SIGHUP, signal.SIGTERM):

3225

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3226

lambda: main_loop.quit() and False)

2732

3227

2733

3228

if use_dbus:

2734

3229

2735

3230

@alternate_dbus_interfaces(

2736

3231

{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })

2737

class MandosDBusService(DBusObjectWithProperties):

3232

class MandosDBusService(DBusObjectWithObjectManager):

2738

3233

"""A D-Bus proxy object"""

2739

3234

2740

3235

def __init__(self):

2742

3237

2743

3238

_interface = "se.recompile.Mandos"

2744

3239

2745

@dbus_interface_annotations(_interface)

2746

def _foo(self):

2747

return {

2748

"org.freedesktop.DBus.Property.EmitsChangedSignal":

2749

"false" }

2750

2751

3240

@dbus.service.signal(_interface, signature="o")

2752

3241

def ClientAdded(self, objpath):

2753

3242

"D-Bus signal"

2758

3247

"D-Bus signal"

2759

3248

pass

2760

3249

3250

@dbus_annotations({"org.freedesktop.DBus.Deprecated":

3251

"true"})

2761

3252

@dbus.service.signal(_interface, signature="os")

2762

3253

def ClientRemoved(self, objpath, name):

2763

3254

"D-Bus signal"

2764

3255

pass

2765

3256

3257

@dbus_annotations({"org.freedesktop.DBus.Deprecated":

3258

"true"})

2766

3259

@dbus.service.method(_interface, out_signature="ao")

2767

3260

def GetAllClients(self):

2768

3261

"D-Bus method"

2769

3262

return dbus.Array(c.dbus_object_path for c in

2770

tcp_server.clients.itervalues())

3263

tcp_server.clients.values())

2771

3264

3265

@dbus_annotations({"org.freedesktop.DBus.Deprecated":

3266

"true"})

2772

3267

@dbus.service.method(_interface,

2773

3268

out_signature="a{oa{sv}}")

2774

3269

def GetAllClientsWithProperties(self):

2775

3270

"D-Bus method"

2776

3271

return dbus.Dictionary(

2777

{ c.dbus_object_path: c.GetAll("")

2778

for c in tcp_server.clients.itervalues() },

3272

{ c.dbus_object_path: c.GetAll(

3273

"se.recompile.Mandos.Client")

3274

for c in tcp_server.clients.values() },

2779

3275

signature="oa{sv}")

2780

3276

2781

3277

@dbus.service.method(_interface, in_signature="o")

2782

3278

def RemoveClient(self, object_path):

2783

3279

"D-Bus method"

2784

for c in tcp_server.clients.itervalues():

3280

for c in tcp_server.clients.values():

2785

3281

if c.dbus_object_path == object_path:

2786

3282

del tcp_server.clients[c.name]

2787

3283

c.remove_from_connection()

2788

# Don't signal anything except ClientRemoved

3284

# Don't signal the disabling

2789

3285

c.disable(quiet=True)

2790

# Emit D-Bus signal

2791

self.ClientRemoved(object_path, c.name)

3286

# Emit D-Bus signal for removal

3287

self.client_removed_signal(c)

2792

3288

return

2793

3289

raise KeyError(object_path)

2794

3290

2795

3291

del _interface

3292

3293

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3294

out_signature = "a{oa{sa{sv}}}")

3295

def GetManagedObjects(self):

3296

"""D-Bus method"""

3297

return dbus.Dictionary(

3298

{ client.dbus_object_path:

3299

dbus.Dictionary(

3300

{ interface: client.GetAll(interface)

3301

for interface in

3302

client._get_all_interface_names()})

3303

for client in tcp_server.clients.values()})

3304

3305

def client_added_signal(self, client):

3306

"""Send the new standard signal and the old signal"""

3307

if use_dbus:

3308

# New standard signal

3309

self.InterfacesAdded(

3310

client.dbus_object_path,

3311

dbus.Dictionary(

3312

{ interface: client.GetAll(interface)

3313

for interface in

3314

client._get_all_interface_names()}))

3315

# Old signal

3316

self.ClientAdded(client.dbus_object_path)

3317

3318

def client_removed_signal(self, client):

3319

"""Send the new standard signal and the old signal"""

3320

if use_dbus:

3321

# New standard signal

3322

self.InterfacesRemoved(

3323

client.dbus_object_path,

3324

client._get_all_interface_names())

3325

# Old signal

3326

self.ClientRemoved(client.dbus_object_path,

3327

client.name)

2796

3328

2797

3329

mandos_dbus_service = MandosDBusService()

2798

3330

3331

# Save modules to variables to exempt the modules from being

3332

# unloaded before the function registered with atexit() is run.

3333

mp = multiprocessing

3334

wn = wnull

2799

3335

def cleanup():

2800

3336

"Cleanup function; run on exit"

2801

3337

if zeroconf:

2802

3338

service.cleanup()

2803

3339

2804

multiprocessing.active_children()

2805

wnull.close()

3340

mp.active_children()

3341

wn.close()

2806

3342

if not (tcp_server.clients or client_settings):

2807

3343

return

2808

3344

2811

3347

# removed/edited, old secret will thus be unrecovable.

2812

3348

clients = {}

2813

3349

with PGPEngine() as pgp:

2814

for client in tcp_server.clients.itervalues():

3350

for client in tcp_server.clients.values():

2815

3351

key = client_settings[client.name]["secret"]

2816

3352

client.encrypted_secret = pgp.encrypt(client.secret,

2817

3353

key)

2841

3377

prefix='clients-',

2842

3378

dir=os.path.dirname(stored_state_path),

2843

3379

delete=False) as stored_state:

2844

pickle.dump((clients, client_settings), stored_state)

3380

pickle.dump((clients, client_settings), stored_state,

3381

protocol = 2)

2845

3382

tempname = stored_state.name

2846

3383

os.rename(tempname, stored_state_path)

2847

3384

except (IOError, OSError) as e:

2863

3400

name, client = tcp_server.clients.popitem()

2864

3401

if use_dbus:

2865

3402

client.remove_from_connection()

2866

# Don't signal anything except ClientRemoved

3403

# Don't signal the disabling

2867

3404

client.disable(quiet=True)

3405

# Emit D-Bus signal for removal

2868

3406

if use_dbus:

2869

# Emit D-Bus signal

2870

mandos_dbus_service.ClientRemoved(

2871

client.dbus_object_path, client.name)

3407

mandos_dbus_service.client_removed_signal(client)

2872

3408

client_settings.clear()

2873

3409

2874

3410

atexit.register(cleanup)

2875

3411

2876

for client in tcp_server.clients.itervalues():

3412

for client in tcp_server.clients.values():

2877

3413

if use_dbus:

2878

# Emit D-Bus signal

2879

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3414

# Emit D-Bus signal for adding

3415

mandos_dbus_service.client_added_signal(client)

2880

3416

# Need to initiate checking of clients

2881

3417

if client.enabled:

2882

3418

client.init_checker()

2908

3444

sys.exit(1)

2909

3445

# End of Avahi example code

2910

3446

2911

gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,

2912

lambda *args, **kwargs:

2913

(tcp_server.handle_request

2914

(*args[2:], **kwargs) or True))

3447

GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,

3448

lambda *args, **kwargs:

3449

(tcp_server.handle_request

3450

(*args[2:], **kwargs) or True))

2915

3451

2916

3452

logger.debug("Starting main loop")

2917

3453

main_loop.run()