/mandos/trunk : revision 844

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

104

97

if sys.version_info.major == 2:

105

98

str = unicode

106

99

107

version = "1.6.9"

100

version = "1.7.7"

108

101

stored_state_file = "clients.pickle"

109

102

110

103

logger = logging.getLogger()

125

118

return interface_index

126

119

127

120

121

def copy_function(func):

122

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

123

if sys.version_info.major == 2:

124

return types.FunctionType(func.func_code,

125

func.func_globals,

126

func.func_name,

127

func.func_defaults,

128

func.func_closure)

129

else:

130

return types.FunctionType(func.__code__,

131

func.__globals__,

132

func.__name__,

133

func.__defaults__,

134

func.__closure__)

135

136

128

137

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

129

138

"""init logger and add loglevel"""

130

139

157

166

158

167

def __init__(self):

159

168

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

169

self.gpg = "gpg"

170

try:

171

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

172

for line in output.splitlines():

173

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

174

if name == "gpg":

175

self.gpg = path

176

break

177

except OSError as e:

178

if e.errno != errno.ENOENT:

179

raise

160

180

self.gnupgargs = ['--batch',

161

'--home', self.tempdir,

181

'--homedir', self.tempdir,

162

182

'--force-mdc',

163

183

'--quiet',

164

184

'--no-use-agent']

203

223

dir=self.tempdir) as passfile:

204

224

passfile.write(passphrase)

205

225

passfile.flush()

206

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

226

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

207

227

'--passphrase-file',

208

228

passfile.name]

209

229

+ self.gnupgargs,

221

241

dir = self.tempdir) as passfile:

222

242

passfile.write(passphrase)

223

243

passfile.flush()

224

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

244

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

225

245

'--passphrase-file',

226

246

passfile.name]

227

247

+ self.gnupgargs,

233

253

raise PGPError(err)

234

254

return decrypted_plaintext

235

255

256

# Pretend that we have an Avahi module

257

class Avahi(object):

258

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

259

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

260

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

261

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

262

PROTO_INET = 0 # avahi-common/address.h

263

PROTO_INET6 = 1 # avahi-common/address.h

264

DBUS_NAME = "org.freedesktop.Avahi"

265

DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

266

DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

267

DBUS_PATH_SERVER = "/"

268

def string_array_to_txt_array(self, t):

269

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

270

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

271

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

272

ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

273

ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

274

SERVER_INVALID = 0 # avahi-common/defs.h

275

SERVER_REGISTERING = 1 # avahi-common/defs.h

276

SERVER_RUNNING = 2 # avahi-common/defs.h

277

SERVER_COLLISION = 3 # avahi-common/defs.h

278

SERVER_FAILURE = 4 # avahi-common/defs.h

279

avahi = Avahi()

236

280

237

281

class AvahiError(Exception):

238

282

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

395

439

logger.error(bad_states[state] + ": %r", error)

396

440

self.cleanup()

397

441

elif state == avahi.SERVER_RUNNING:

398

self.add()

442

try:

443

self.add()

444

except dbus.exceptions.DBusException as error:

445

if (error.get_dbus_name()

446

== "org.freedesktop.Avahi.CollisionError"):

447

logger.info("Local Zeroconf service name"

448

" collision.")

449

return self.rename(remove=False)

450

else:

451

logger.critical("D-Bus Exception", exc_info=error)

452

self.cleanup()

453

os._exit(1)

399

454

else:

400

455

if error is None:

401

456

logger.debug("Unknown state: %r", state)

424

479

.format(self.name)))

425

480

return ret

426

481

482

# Pretend that we have a GnuTLS module

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."""

486

487

_library = ctypes.cdll.LoadLibrary(

488

ctypes.util.find_library("gnutls"))

489

_need_version = b"3.3.0"

490

def __init__(self):

491

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

492

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

493

# happens.

494

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

495

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

496

.format(self._need_version))

497

498

# Unless otherwise indicated, the constants and types below are

499

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

500

501

# Constants

502

E_SUCCESS = 0

503

E_INTERRUPTED = -52

504

E_AGAIN = -28

505

CRT_OPENPGP = 2

506

CLIENT = 2

507

SHUT_RDWR = 0

508

CRD_CERTIFICATE = 1

509

E_NO_CERTIFICATE_FOUND = -49

510

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

511

512

# Types

513

class session_int(ctypes.Structure):

514

_fields_ = []

515

session_t = ctypes.POINTER(session_int)

516

class certificate_credentials_st(ctypes.Structure):

517

_fields_ = []

518

certificate_credentials_t = ctypes.POINTER(

519

certificate_credentials_st)

520

certificate_type_t = ctypes.c_int

521

class datum_t(ctypes.Structure):

522

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

523

('size', ctypes.c_uint)]

524

class openpgp_crt_int(ctypes.Structure):

525

_fields_ = []

526

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

527

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

528

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

529

credentials_type_t = ctypes.c_int

530

transport_ptr_t = ctypes.c_void_p

531

close_request_t = ctypes.c_int

532

533

# Exceptions

534

class Error(Exception):

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=()):

540

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

541

# code is passed, convert it to a string with

542

# gnutls.strerror()

543

self.code = code

544

if message is None and code is not None:

545

message = GnuTLS.strerror(code)

546

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

547

message, *args)

548

549

class CertificateSecurityError(Error):

550

pass

551

552

# Classes

553

class Credentials(object):

554

def __init__(self):

555

self._c_object = gnutls.certificate_credentials_t()

556

gnutls.certificate_allocate_credentials(

557

ctypes.byref(self._c_object))

558

self.type = gnutls.CRD_CERTIFICATE

559

560

def __del__(self):

561

gnutls.certificate_free_credentials(self._c_object)

562

563

class ClientSession(object):

564

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

565

self._c_object = gnutls.session_t()

566

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

567

gnutls.set_default_priority(self._c_object)

568

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

569

gnutls.handshake_set_private_extensions(self._c_object,

570

True)

571

self.socket = socket

572

if credentials is None:

573

credentials = gnutls.Credentials()

574

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

575

ctypes.cast(credentials._c_object,

576

ctypes.c_void_p))

577

self.credentials = credentials

578

579

def __del__(self):

580

gnutls.deinit(self._c_object)

581

582

def handshake(self):

583

return gnutls.handshake(self._c_object)

584

585

def send(self, data):

586

data = bytes(data)

587

data_len = len(data)

588

while data_len > 0:

589

data_len -= gnutls.record_send(self._c_object,

590

data[-data_len:],

591

data_len)

592

593

def bye(self):

594

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

595

596

# Error handling functions

597

def _error_code(result):

598

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

599

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

600

if result >= 0:

601

return result

602

if result == gnutls.E_NO_CERTIFICATE_FOUND:

603

raise gnutls.CertificateSecurityError(code = result)

604

raise gnutls.Error(code = result)

605

606

def _retry_on_error(result, func, arguments):

607

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

608

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

609

while result < 0:

610

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

611

return _error_code(result)

612

result = func(*arguments)

613

return result

614

615

# Unless otherwise indicated, the function declarations below are

616

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

617

618

# Functions

619

priority_set_direct = _library.gnutls_priority_set_direct

620

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

621

ctypes.POINTER(ctypes.c_char_p)]

622

priority_set_direct.restype = _error_code

623

624

init = _library.gnutls_init

625

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

626

init.restype = _error_code

627

628

set_default_priority = _library.gnutls_set_default_priority

629

set_default_priority.argtypes = [session_t]

630

set_default_priority.restype = _error_code

631

632

record_send = _library.gnutls_record_send

633

record_send.argtypes = [session_t, ctypes.c_void_p,

634

ctypes.c_size_t]

635

record_send.restype = ctypes.c_ssize_t

636

record_send.errcheck = _retry_on_error

637

638

certificate_allocate_credentials = (

639

_library.gnutls_certificate_allocate_credentials)

640

certificate_allocate_credentials.argtypes = [

641

ctypes.POINTER(certificate_credentials_t)]

642

certificate_allocate_credentials.restype = _error_code

643

644

certificate_free_credentials = (

645

_library.gnutls_certificate_free_credentials)

646

certificate_free_credentials.argtypes = [certificate_credentials_t]

647

certificate_free_credentials.restype = None

648

649

handshake_set_private_extensions = (

650

_library.gnutls_handshake_set_private_extensions)

651

handshake_set_private_extensions.argtypes = [session_t,

652

ctypes.c_int]

653

handshake_set_private_extensions.restype = None

654

655

credentials_set = _library.gnutls_credentials_set

656

credentials_set.argtypes = [session_t, credentials_type_t,

657

ctypes.c_void_p]

658

credentials_set.restype = _error_code

659

660

strerror = _library.gnutls_strerror

661

strerror.argtypes = [ctypes.c_int]

662

strerror.restype = ctypes.c_char_p

663

664

certificate_type_get = _library.gnutls_certificate_type_get

665

certificate_type_get.argtypes = [session_t]

666

certificate_type_get.restype = _error_code

667

668

certificate_get_peers = _library.gnutls_certificate_get_peers

669

certificate_get_peers.argtypes = [session_t,

670

ctypes.POINTER(ctypes.c_uint)]

671

certificate_get_peers.restype = ctypes.POINTER(datum_t)

672

673

global_set_log_level = _library.gnutls_global_set_log_level

674

global_set_log_level.argtypes = [ctypes.c_int]

675

global_set_log_level.restype = None

676

677

global_set_log_function = _library.gnutls_global_set_log_function

678

global_set_log_function.argtypes = [log_func]

679

global_set_log_function.restype = None

680

681

deinit = _library.gnutls_deinit

682

deinit.argtypes = [session_t]

683

deinit.restype = None

684

685

handshake = _library.gnutls_handshake

686

handshake.argtypes = [session_t]

687

handshake.restype = _error_code

688

handshake.errcheck = _retry_on_error

689

690

transport_set_ptr = _library.gnutls_transport_set_ptr

691

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

692

transport_set_ptr.restype = None

693

694

bye = _library.gnutls_bye

695

bye.argtypes = [session_t, close_request_t]

696

bye.restype = _error_code

697

bye.errcheck = _retry_on_error

698

699

check_version = _library.gnutls_check_version

700

check_version.argtypes = [ctypes.c_char_p]

701

check_version.restype = ctypes.c_char_p

702

703

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

704

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

708

709

openpgp_crt_import = _library.gnutls_openpgp_crt_import

710

openpgp_crt_import.argtypes = [openpgp_crt_t,

711

ctypes.POINTER(datum_t),

712

openpgp_crt_fmt_t]

713

openpgp_crt_import.restype = _error_code

714

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

719

720

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

721

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

722

openpgp_crt_deinit.restype = None

723

724

openpgp_crt_get_fingerprint = (

725

_library.gnutls_openpgp_crt_get_fingerprint)

726

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

727

ctypes.c_void_p,

728

ctypes.POINTER(

729

ctypes.c_size_t)]

730

openpgp_crt_get_fingerprint.restype = _error_code

731

732

# Remove non-public functions

733

del _error_code, _retry_on_error

734

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

735

gnutls = GnuTLS()

736

427

737

def call_pipe(connection, # : multiprocessing.Connection

428

738

func, *args, **kwargs):

429

739

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

444

754

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

445

755

to see if the client lives.

446

756

'None' if no process is running.

447

checker_callback_tag: a gobject event source tag, or None

757

checker_callback_tag: a GLib event source tag, or None

448

758

checker_command: string; External command which is run to check

449

759

if client lives. %() expansions are done at

450

760

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

451

761

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

452

checker_initiator_tag: a gobject event source tag, or None

762

checker_initiator_tag: a GLib event source tag, or None

453

763

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

454

764

client_structure: Object describing what attributes a client has

455

765

and is used for storing the client at exit

456

766

current_checker_command: string; current running checker_command

457

disable_initiator_tag: a gobject event source tag, or None

767

disable_initiator_tag: a GLib event source tag, or None

458

768

enabled: bool()

459

769

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

460

770

uniquely identify the client

523

833

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

524

834

.replace(" ", ""))

525

835

if "secret" in section:

526

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

836

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

837

.encode("utf-8"),

838

"base64")

527

839

elif "secfile" in section:

528

840

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

529

841

(section["secfile"])),

582

894

self.changedstate = multiprocessing_manager.Condition(

583

895

multiprocessing_manager.Lock())

584

896

self.client_structure = [attr

585

for attr in self.__dict__.iterkeys()

897

for attr in self.__dict__.keys()

586

898

if not attr.startswith("_")]

587

899

self.client_structure.append("client_structure")

588

900

614

926

if not quiet:

615

927

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

616

928

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

617

gobject.source_remove(self.disable_initiator_tag)

929

GLib.source_remove(self.disable_initiator_tag)

618

930

self.disable_initiator_tag = None

619

931

self.expires = None

620

932

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

621

gobject.source_remove(self.checker_initiator_tag)

933

GLib.source_remove(self.checker_initiator_tag)

622

934

self.checker_initiator_tag = None

623

935

self.stop_checker()

624

936

self.enabled = False

625

937

if not quiet:

626

938

self.send_changedstate()

627

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

939

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

628

940

return False

629

941

630

942

def __del__(self):

634

946

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

635

947

# and every interval from then on.

636

948

if self.checker_initiator_tag is not None:

637

gobject.source_remove(self.checker_initiator_tag)

638

self.checker_initiator_tag = gobject.timeout_add(

949

GLib.source_remove(self.checker_initiator_tag)

950

self.checker_initiator_tag = GLib.timeout_add(

639

951

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

640

952

self.start_checker)

641

953

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

642

954

if self.disable_initiator_tag is not None:

643

gobject.source_remove(self.disable_initiator_tag)

644

self.disable_initiator_tag = gobject.timeout_add(

955

GLib.source_remove(self.disable_initiator_tag)

956

self.disable_initiator_tag = GLib.timeout_add(

645

957

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

646

958

# Also start a new checker *right now*.

647

959

self.start_checker()

683

995

if timeout is None:

684

996

timeout = self.timeout

685

997

if self.disable_initiator_tag is not None:

686

gobject.source_remove(self.disable_initiator_tag)

998

GLib.source_remove(self.disable_initiator_tag)

687

999

self.disable_initiator_tag = None

688

1000

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

689

self.disable_initiator_tag = gobject.timeout_add(

1001

self.disable_initiator_tag = GLib.timeout_add(

690

1002

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

691

1003

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

692

1004

747

1059

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

748

1060

kwargs = popen_args)

749

1061

self.checker.start()

750

self.checker_callback_tag = gobject.io_add_watch(

751

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

1062

self.checker_callback_tag = GLib.io_add_watch(

1063

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

752

1064

self.checker_callback, pipe[0], command)

753

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

1065

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

754

1066

return True

755

1067

756

1068

def stop_checker(self):

757

1069

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

758

1070

if self.checker_callback_tag:

759

gobject.source_remove(self.checker_callback_tag)

1071

GLib.source_remove(self.checker_callback_tag)

760

1072

self.checker_callback_tag = None

761

1073

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

762

1074

return

831

1143

access="r")

832

1144

def Property_dbus_property(self):

833

1145

return dbus.Boolean(False)

1146

1147

See also the DBusObjectWithAnnotations class.

834

1148

"""

835

1149

836

1150

def decorator(func):

858

1172

pass

859

1173

860

1174

861

class DBusObjectWithProperties(dbus.service.Object):

862

"""A D-Bus object with properties.

1175

class DBusObjectWithAnnotations(dbus.service.Object):

1176

"""A D-Bus object with annotations.

863

1177

864

Classes inheriting from this can use the dbus_service_property

865

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

866

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

1178

Classes inheriting from this can use the dbus_annotations

1179

decorator to add annotations to methods or signals.

867

1180

"""

868

1181

869

1182

@staticmethod

885

1198

for name, athing in

886

1199

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

887

1200

1201

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1202

out_signature = "s",

1203

path_keyword = 'object_path',

1204

connection_keyword = 'connection')

1205

def Introspect(self, object_path, connection):

1206

"""Overloading of standard D-Bus method.

1207

1208

Inserts annotation tags on methods and signals.

1209

"""

1210

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

1211

connection)

1212

try:

1213

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

1214

1215

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

1216

# Add annotation tags

1217

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

1218

for tag in if_tag.getElementsByTagName(typ):

1219

annots = dict()

1220

for name, prop in (self.

1221

_get_all_dbus_things(typ)):

1222

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

1223

and prop._dbus_interface

1224

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

1225

annots.update(getattr(

1226

prop, "_dbus_annotations", {}))

1227

for name, value in annots.items():

1228

ann_tag = document.createElement(

1229

"annotation")

1230

ann_tag.setAttribute("name", name)

1231

ann_tag.setAttribute("value", value)

1232

tag.appendChild(ann_tag)

1233

# Add interface annotation tags

1234

for annotation, value in dict(

1235

itertools.chain.from_iterable(

1236

annotations().items()

1237

for name, annotations

1238

in self._get_all_dbus_things("interface")

1239

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

1240

)).items():

1241

ann_tag = document.createElement("annotation")

1242

ann_tag.setAttribute("name", annotation)

1243

ann_tag.setAttribute("value", value)

1244

if_tag.appendChild(ann_tag)

1245

# Fix argument name for the Introspect method itself

1246

if (if_tag.getAttribute("name")

1247

== dbus.INTROSPECTABLE_IFACE):

1248

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

1249

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

1250

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

1251

if (arg.getAttribute("direction")

1252

== "out"):

1253

arg.setAttribute("name",

1254

"xml_data")

1255

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

1256

document.unlink()

1257

except (AttributeError, xml.dom.DOMException,

1258

xml.parsers.expat.ExpatError) as error:

1259

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

1260

exc_info=error)

1261

return xmlstring

1262

1263

1264

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1265

"""A D-Bus object with properties.

1266

1267

Classes inheriting from this can use the dbus_service_property

1268

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

1269

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

1270

"""

1271

888

1272

def _get_dbus_property(self, interface_name, property_name):

889

1273

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

890

1274

property with the specified name and interface.

900

1284

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

901

1285

self.dbus_object_path, interface_name, property_name))

902

1286

1287

@classmethod

1288

def _get_all_interface_names(cls):

1289

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

1290

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

1291

"_dbus_interface", None)

1292

for x in (inspect.getmro(cls))

1293

for attr in dir(x))

1294

if name is not None)

1295

903

1296

@dbus.service.method(dbus.PROPERTIES_IFACE,

904

1297

in_signature="ss",

905

1298

out_signature="v")

975

1368

976

1369

Inserts property tags and interface annotation tags.

977

1370

"""

978

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

979

connection)

1371

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1372

object_path,

1373

connection)

980

1374

try:

981

1375

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

982

1376

995

1389

if prop._dbus_interface

996

1390

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

997

1391

if_tag.appendChild(tag)

998

# Add annotation tags

999

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

1000

for tag in if_tag.getElementsByTagName(typ):

1001

annots = dict()

1002

for name, prop in (self.

1003

_get_all_dbus_things(typ)):

1004

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

1005

and prop._dbus_interface

1006

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

1007

annots.update(getattr(

1008

prop, "_dbus_annotations", {}))

1009

for name, value in annots.items():

1010

ann_tag = document.createElement(

1011

"annotation")

1012

ann_tag.setAttribute("name", name)

1013

ann_tag.setAttribute("value", value)

1014

tag.appendChild(ann_tag)

1015

# Add interface annotation tags

1016

for annotation, value in dict(

1017

itertools.chain.from_iterable(

1018

annotations().items()

1019

for name, annotations

1020

in self._get_all_dbus_things("interface")

1021

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

1022

)).items():

1023

ann_tag = document.createElement("annotation")

1024

ann_tag.setAttribute("name", annotation)

1025

ann_tag.setAttribute("value", value)

1026

if_tag.appendChild(ann_tag)

1392

# Add annotation tags for properties

1393

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

1394

annots = dict()

1395

for name, prop in self._get_all_dbus_things(

1396

"property"):

1397

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

1398

and prop._dbus_interface

1399

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

1400

annots.update(getattr(

1401

prop, "_dbus_annotations", {}))

1402

for name, value in annots.items():

1403

ann_tag = document.createElement(

1404

"annotation")

1405

ann_tag.setAttribute("name", name)

1406

ann_tag.setAttribute("value", value)

1407

tag.appendChild(ann_tag)

1027

1408

# Add the names to the return values for the

1028

1409

# "org.freedesktop.DBus.Properties" methods

1029

1410

if (if_tag.getAttribute("name")

1047

1428

exc_info=error)

1048

1429

return xmlstring

1049

1430

1431

try:

1432

dbus.OBJECT_MANAGER_IFACE

1433

except AttributeError:

1434

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

1435

1436

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1437

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

1438

1439

Classes inheriting from this exposes the standard

1440

GetManagedObjects call and the InterfacesAdded and

1441

InterfacesRemoved signals on the standard

1442

"org.freedesktop.DBus.ObjectManager" interface.

1443

1444

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

1445

manually.

1446

"""

1447

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1448

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

1449

def GetManagedObjects(self):

1450

"""This function must be overridden"""

1451

raise NotImplementedError()

1452

1453

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1454

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

1455

def InterfacesAdded(self, object_path, interfaces_and_properties):

1456

pass

1457

1458

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

1459

def InterfacesRemoved(self, object_path, interfaces):

1460

pass

1461

1462

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1463

out_signature = "s",

1464

path_keyword = 'object_path',

1465

connection_keyword = 'connection')

1466

def Introspect(self, object_path, connection):

1467

"""Overloading of standard D-Bus method.

1468

1469

Override return argument name of GetManagedObjects to be

1470

"objpath_interfaces_and_properties"

1471

"""

1472

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1473

object_path,

1474

connection)

1475

try:

1476

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

1477

1478

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

1479

# Fix argument name for the GetManagedObjects method

1480

if (if_tag.getAttribute("name")

1481

== dbus.OBJECT_MANAGER_IFACE):

1482

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

1483

if (cn.getAttribute("name")

1484

== "GetManagedObjects"):

1485

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

1486

if (arg.getAttribute("direction")

1487

== "out"):

1488

arg.setAttribute(

1489

"name",

1490

"objpath_interfaces"

1491

"_and_properties")

1492

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

1493

document.unlink()

1494

except (AttributeError, xml.dom.DOMException,

1495

xml.parsers.expat.ExpatError) as error:

1496

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

1497

exc_info = error)

1498

return xmlstring

1050

1499

1051

1500

def datetime_to_dbus(dt, variant_level=0):

1052

1501

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

1099

1548

interface_names.add(alt_interface)

1100

1549

# Is this a D-Bus signal?

1101

1550

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

1551

# Extract the original non-method undecorated

1552

# function by black magic

1102

1553

if sys.version_info.major == 2:

1103

# Extract the original non-method undecorated

1104

# function by black magic

1105

1554

nonmethod_func = (dict(

1106

1555

zip(attribute.func_code.co_freevars,

1107

1556

attribute.__closure__))

1108

1557

["func"].cell_contents)

1109

1558

else:

1110

nonmethod_func = attribute

1559

nonmethod_func = (dict(

1560

zip(attribute.__code__.co_freevars,

1561

attribute.__closure__))

1562

["func"].cell_contents)

1111

1563

# Create a new, but exactly alike, function

1112

1564

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

1113

1565

# with the alternate D-Bus interface name

1114

if sys.version_info.major == 2:

1115

new_function = types.FunctionType(

1116

nonmethod_func.func_code,

1117

nonmethod_func.func_globals,

1118

nonmethod_func.func_name,

1119

nonmethod_func.func_defaults,

1120

nonmethod_func.func_closure)

1121

else:

1122

new_function = types.FunctionType(

1123

nonmethod_func.__code__,

1124

nonmethod_func.__globals__,

1125

nonmethod_func.__name__,

1126

nonmethod_func.__defaults__,

1127

nonmethod_func.__closure__)

1566

new_function = copy_function(nonmethod_func)

1128

1567

new_function = (dbus.service.signal(

1129

1568

alt_interface,

1130

1569

attribute._dbus_signature)(new_function))

1143

1582

func1 and func2 to the "call_both" function

1144

1583

outside of its arguments"""

1145

1584

1585

@functools.wraps(func2)

1146

1586

def call_both(*args, **kwargs):

1147

1587

"""This function will emit two D-Bus

1148

1588

signals by calling func1 and func2"""

1149

1589

func1(*args, **kwargs)

1150

1590

func2(*args, **kwargs)

1591

# Make wrapper function look like a D-Bus signal

1592

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

1593

if name.startswith("_dbus_"):

1594

setattr(call_both, name, attr)

1151

1595

1152

1596

return call_both

1153

1597

# Create the "call_both" function and add it to

1164

1608

alt_interface,

1165

1609

attribute._dbus_in_signature,

1166

1610

attribute._dbus_out_signature)

1167

(types.FunctionType(attribute.func_code,

1168

attribute.func_globals,

1169

attribute.func_name,

1170

attribute.func_defaults,

1171

attribute.func_closure)))

1611

(copy_function(attribute)))

1172

1612

# Copy annotations, if any

1173

1613

try:

1174

1614

attr[attrname]._dbus_annotations = dict(

1186

1626

attribute._dbus_access,

1187

1627

attribute._dbus_get_args_options

1188

1628

["byte_arrays"])

1189

(types.FunctionType(

1190

attribute.func_code,

1191

attribute.func_globals,

1192

attribute.func_name,

1193

attribute.func_defaults,

1194

attribute.func_closure)))

1629

(copy_function(attribute)))

1195

1630

# Copy annotations, if any

1196

1631

try:

1197

1632

attr[attrname]._dbus_annotations = dict(

1206

1641

# to the class.

1207

1642

attr[attrname] = (

1208

1643

dbus_interface_annotations(alt_interface)

1209

(types.FunctionType(attribute.func_code,

1210

attribute.func_globals,

1211

attribute.func_name,

1212

attribute.func_defaults,

1213

attribute.func_closure)))

1644

(copy_function(attribute)))

1214

1645

if deprecate:

1215

1646

# Deprecate all alternate interfaces

1216

1647

iname="_AlternateDBusNames_interface_annotation{}"

1229

1660

if interface_names:

1230

1661

# Replace the class with a new subclass of it with

1231

1662

# methods, signals, etc. as created above.

1232

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

1233

(cls, ), attr)

1663

if sys.version_info.major == 2:

1664

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

1665

(cls, ), attr)

1666

else:

1667

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

1668

(cls, ), attr)

1234

1669

return cls

1235

1670

1236

1671

return wrapper

1365

1800

if exitstatus >= 0:

1366

1801

# Emit D-Bus signal

1367

1802

self.CheckerCompleted(dbus.Int16(exitstatus),

1368

dbus.Int64(0),

1803

# This is specific to GNU libC

1804

dbus.Int64(exitstatus << 8),

1369

1805

dbus.String(command))

1370

1806

else:

1371

1807

# Emit D-Bus signal

1372

1808

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

1373

1809

dbus.Int64(

1374

self.last_checker_signal),

1810

# This is specific to GNU libC

1811

(exitstatus << 8)

1812

| self.last_checker_signal),

1375

1813

dbus.String(command))

1376

1814

return ret

1377

1815

1391

1829

1392

1830

def approve(self, value=True):

1393

1831

self.approved = value

1394

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

1395

* 1000), self._reset_approved)

1832

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

1833

* 1000), self._reset_approved)

1396

1834

self.send_changedstate()

1397

1835

1398

1836

## D-Bus methods, signals & properties

1454

1892

self.checked_ok()

1455

1893

1456

1894

# Enable - method

1895

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

1457

1896

@dbus.service.method(_interface)

1458

1897

def Enable(self):

1459

1898

"D-Bus method"

1460

1899

self.enable()

1461

1900

1462

1901

# StartChecker - method

1902

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

1463

1903

@dbus.service.method(_interface)

1464

1904

def StartChecker(self):

1465

1905

"D-Bus method"

1466

1906

self.start_checker()

1467

1907

1468

1908

# Disable - method

1909

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

1469

1910

@dbus.service.method(_interface)

1470

1911

def Disable(self):

1471

1912

"D-Bus method"

1472

1913

self.disable()

1473

1914

1474

1915

# StopChecker - method

1916

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

1475

1917

@dbus.service.method(_interface)

1476

1918

def StopChecker(self):

1477

1919

self.stop_checker()

1513

1955

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

1514

1956

1515

1957

# Name - property

1958

@dbus_annotations(

1959

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

1516

1960

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

1517

1961

def Name_dbus_property(self):

1518

1962

return dbus.String(self.name)

1519

1963

1520

1964

# Fingerprint - property

1965

@dbus_annotations(

1966

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

1521

1967

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

1522

1968

def Fingerprint_dbus_property(self):

1523

1969

return dbus.String(self.fingerprint)

1532

1978

self.host = str(value)

1533

1979

1534

1980

# Created - property

1981

@dbus_annotations(

1982

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

1535

1983

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

1536

1984

def Created_dbus_property(self):

1537

1985

return datetime_to_dbus(self.created)

1598

2046

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

1599

2047

is None):

1600

2048

return

1601

gobject.source_remove(self.disable_initiator_tag)

1602

self.disable_initiator_tag = gobject.timeout_add(

2049

GLib.source_remove(self.disable_initiator_tag)

2050

self.disable_initiator_tag = GLib.timeout_add(

1603

2051

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

1604

2052

self.disable)

1605

2053

1625

2073

return

1626

2074

if self.enabled:

1627

2075

# Reschedule checker run

1628

gobject.source_remove(self.checker_initiator_tag)

1629

self.checker_initiator_tag = gobject.timeout_add(

2076

GLib.source_remove(self.checker_initiator_tag)

2077

self.checker_initiator_tag = GLib.timeout_add(

1630

2078

value, self.start_checker)

1631

2079

self.start_checker() # Start one now, too

1632

2080

1652

2100

self.stop_checker()

1653

2101

1654

2102

# ObjectPath - property

2103

@dbus_annotations(

2104

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

2105

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

1655

2106

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

1656

2107

def ObjectPath_dbus_property(self):

1657

2108

return self.dbus_object_path # is already a dbus.ObjectPath

1658

2109

1659

2110

# Secret = property

2111

@dbus_annotations(

2112

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

2113

"invalidates"})

1660

2114

@dbus_service_property(_interface,

1661

2115

signature="ay",

1662

2116

access="write",

1708

2162

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

1709

2163

self.server.child_pipe.fileno())

1710

2164

1711

session = gnutls.connection.ClientSession(

1712

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

1713

1714

# Note: gnutls.connection.X509Credentials is really a

1715

# generic GnuTLS certificate credentials object so long as

1716

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

1717

# here despite using OpenPGP certificates.

2165

session = gnutls.ClientSession(self.request)

1718

2166

1719

2167

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

1720

2168

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

1724

2172

priority = self.server.gnutls_priority

1725

2173

if priority is None:

1726

2174

priority = "NORMAL"

1727

gnutls.library.functions.gnutls_priority_set_direct(

1728

session._c_object, priority, None)

2175

gnutls.priority_set_direct(session._c_object, priority,

2176

None)

1729

2177

1730

2178

# Start communication using the Mandos protocol

1731

2179

# Get protocol number

1741

2189

# Start GnuTLS connection

1742

2190

try:

1743

2191

session.handshake()

1744

except gnutls.errors.GNUTLSError as error:

2192

except gnutls.Error as error:

1745

2193

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

1746

2194

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

1747

2195

# established. Just abandon the request.

1753

2201

try:

1754

2202

fpr = self.fingerprint(

1755

2203

self.peer_certificate(session))

1756

except (TypeError,

1757

gnutls.errors.GNUTLSError) as error:

2204

except (TypeError, gnutls.Error) as error:

1758

2205

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

1759

2206

return

1760

2207

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

1818

2265

else:

1819

2266

delay -= time2 - time

1820

2267

1821

sent_size = 0

1822

while sent_size < len(client.secret):

1823

try:

1824

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

1825

except gnutls.errors.GNUTLSError as error:

1826

logger.warning("gnutls send failed",

1827

exc_info=error)

1828

return

1829

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

1830

len(client.secret) - (sent_size

1831

+ sent))

1832

sent_size += sent

2268

try:

2269

session.send(client.secret)

2270

except gnutls.Error as error:

2271

logger.warning("gnutls send failed",

2272

exc_info = error)

2273

return

1833

2274

1834

2275

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

1835

2276

# bump the timeout using extended_timeout

1843

2284

client.approvals_pending -= 1

1844

2285

try:

1845

2286

session.bye()

1846

except gnutls.errors.GNUTLSError as error:

2287

except gnutls.Error as error:

1847

2288

logger.warning("GnuTLS bye failed",

1848

2289

exc_info=error)

1849

2290

1851

2292

def peer_certificate(session):

1852

2293

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

1853

2294

# If not an OpenPGP certificate...

1854

if (gnutls.library.functions.gnutls_certificate_type_get(

1855

session._c_object)

1856

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1857

# ...do the normal thing

1858

return session.peer_certificate

2295

if (gnutls.certificate_type_get(session._c_object)

2296

!= gnutls.CRT_OPENPGP):

2297

# ...return invalid data

2298

return b""

1859

2299

list_size = ctypes.c_uint(1)

1860

cert_list = (gnutls.library.functions

1861

.gnutls_certificate_get_peers

2300

cert_list = (gnutls.certificate_get_peers

1862

2301

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

1863

2302

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

1864

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

1865

" certificate")

2303

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

1866

2304

if list_size.value == 0:

1867

2305

return None

1868

2306

cert = cert_list[0]

1872

2310

def fingerprint(openpgp):

1873

2311

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1874

2312

# New GnuTLS "datum" with the OpenPGP public key

1875

datum = gnutls.library.types.gnutls_datum_t(

2313

datum = gnutls.datum_t(

1876

2314

ctypes.cast(ctypes.c_char_p(openpgp),

1877

2315

ctypes.POINTER(ctypes.c_ubyte)),

1878

2316

ctypes.c_uint(len(openpgp)))

1879

2317

# New empty GnuTLS certificate

1880

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1881

gnutls.library.functions.gnutls_openpgp_crt_init(

1882

ctypes.byref(crt))

2318

crt = gnutls.openpgp_crt_t()

2319

gnutls.openpgp_crt_init(ctypes.byref(crt))

1883

2320

# Import the OpenPGP public key into the certificate

1884

gnutls.library.functions.gnutls_openpgp_crt_import(

1885

crt, ctypes.byref(datum),

1886

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

2321

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

2322

gnutls.OPENPGP_FMT_RAW)

1887

2323

# Verify the self signature in the key

1888

2324

crtverify = ctypes.c_uint()

1889

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1890

crt, 0, ctypes.byref(crtverify))

2325

gnutls.openpgp_crt_verify_self(crt, 0,

2326

ctypes.byref(crtverify))

1891

2327

if crtverify.value != 0:

1892

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1893

raise gnutls.errors.CertificateSecurityError(

1894

"Verify failed")

2328

gnutls.openpgp_crt_deinit(crt)

2329

raise gnutls.CertificateSecurityError("Verify failed")

1895

2330

# New buffer for the fingerprint

1896

2331

buf = ctypes.create_string_buffer(20)

1897

2332

buf_len = ctypes.c_size_t()

1898

2333

# Get the fingerprint from the certificate into the buffer

1899

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1900

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

2334

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

2335

ctypes.byref(buf_len))

1901

2336

# Deinit the certificate

1902

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2337

gnutls.openpgp_crt_deinit(crt)

1903

2338

# Convert the buffer to a Python bytestring

1904

2339

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

1905

2340

# Convert the bytestring to hexadecimal notation

2049

2484

gnutls_priority GnuTLS priority string

2050

2485

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

2051

2486

2052

Assumes a gobject.MainLoop event loop.

2487

Assumes a GLib.MainLoop event loop.

2053

2488

"""

2054

2489

2055

2490

def __init__(self, server_address, RequestHandlerClass,

2080

2515

2081

2516

def add_pipe(self, parent_pipe, proc):

2082

2517

# Call "handle_ipc" for both data and EOF events

2083

gobject.io_add_watch(

2518

GLib.io_add_watch(

2084

2519

parent_pipe.fileno(),

2085

gobject.IO_IN | gobject.IO_HUP,

2520

GLib.IO_IN | GLib.IO_HUP,

2086

2521

functools.partial(self.handle_ipc,

2087

2522

parent_pipe = parent_pipe,

2088

2523

proc = proc))

2092

2527

proc = None,

2093

2528

client_object=None):

2094

2529

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

2095

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

2530

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

2096

2531

# Wait for other process to exit

2097

2532

proc.join()

2098

2533

return False

2105

2540

fpr = request[1]

2106

2541

address = request[2]

2107

2542

2108

for c in self.clients.itervalues():

2543

for c in self.clients.values():

2109

2544

if c.fingerprint == fpr:

2110

2545

client = c

2111

2546

break

2119

2554

parent_pipe.send(False)

2120

2555

return False

2121

2556

2122

gobject.io_add_watch(

2557

GLib.io_add_watch(

2123

2558

parent_pipe.fileno(),

2124

gobject.IO_IN | gobject.IO_HUP,

2559

GLib.IO_IN | GLib.IO_HUP,

2125

2560

functools.partial(self.handle_ipc,

2126

2561

parent_pipe = parent_pipe,

2127

2562

proc = proc,

2386

2821

"debug": "False",

2387

2822

"priority":

2388

2823

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"

2389

":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

2824

":+SIGN-DSA-SHA256",

2390

2825

"servicename": "Mandos",

2391

2826

"use_dbus": "True",

2392

2827

"use_ipv6": "True",

2509

2944

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

2510

2945

exc_info=e)

2511

2946

2512

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

2947

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

2948

("mandos", "mandos"),

2949

("nobody", "nogroup")):

2513

2950

try:

2514

2951

uid = pwd.getpwnam(name).pw_uid

2515

gid = pwd.getpwnam(name).pw_gid

2952

gid = pwd.getpwnam(group).pw_gid

2516

2953

break

2517

2954

except KeyError:

2518

2955

continue

2522

2959

try:

2523

2960

os.setgid(gid)

2524

2961

os.setuid(uid)

2962

if debug:

2963

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

2964

gid))

2525

2965

except OSError as error:

2966

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

2967

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

2526

2968

if error.errno != errno.EPERM:

2527

2969

raise

2528

2970

2531

2973

2532

2974

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

2533

2975

# - GnuTLS manual

2534

gnutls.library.functions.gnutls_global_set_log_level(11)

2976

gnutls.global_set_log_level(11)

2535

2977

2536

@gnutls.library.types.gnutls_log_func

2978

@gnutls.log_func

2537

2979

def debug_gnutls(level, string):

2538

2980

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

2539

2981

2540

gnutls.library.functions.gnutls_global_set_log_function(

2541

debug_gnutls)

2982

gnutls.global_set_log_function(debug_gnutls)

2542

2983

2543

2984

# Redirect stdin so all checkers get /dev/null

2544

2985

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

2551

2992

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

2552

2993

daemon()

2553

2994

2554

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

2555

# need to inform gobject that threads will be used.

2556

gobject.threads_init()

2995

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

2996

# to inform GLib that threads will be used.

2997

GLib.threads_init()

2557

2998

2558

2999

global main_loop

2559

3000

# From the Avahi example code

2560

3001

DBusGMainLoop(set_as_default=True)

2561

main_loop = gobject.MainLoop()

3002

main_loop = GLib.MainLoop()

2562

3003

bus = dbus.SystemBus()

2563

3004

# End of Avahi example code

2564

3005

if use_dbus:

2608

3049

if server_settings["restore"]:

2609

3050

try:

2610

3051

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

2611

clients_data, old_client_settings = pickle.load(

2612

stored_state)

3052

if sys.version_info.major == 2:

3053

clients_data, old_client_settings = pickle.load(

3054

stored_state)

3055

else:

3056

bytes_clients_data, bytes_old_client_settings = (

3057

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

3058

### Fix bytes to strings

3059

## clients_data

3060

# .keys()

3061

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

3062

if isinstance(key, bytes)

3063

else key): value

3064

for key, value in

3065

bytes_clients_data.items() }

3066

del bytes_clients_data

3067

for key in clients_data:

3068

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

3069

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

3070

for k, v in

3071

clients_data[key].items() }

3072

clients_data[key] = value

3073

# .client_structure

3074

value["client_structure"] = [

3075

(s.decode("utf-8")

3076

if isinstance(s, bytes)

3077

else s) for s in

3078

value["client_structure"] ]

3079

# .name & .host

3080

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

3081

if isinstance(value[k], bytes):

3082

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

3083

## old_client_settings

3084

# .keys()

3085

old_client_settings = {

3086

(key.decode("utf-8")

3087

if isinstance(key, bytes)

3088

else key): value

3089

for key, value in

3090

bytes_old_client_settings.items() }

3091

del bytes_old_client_settings

3092

# .host

3093

for value in old_client_settings.values():

3094

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

3095

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

3096

.decode("utf-8"))

2613

3097

os.remove(stored_state_path)

2614

3098

except IOError as e:

2615

3099

if e.errno == errno.ENOENT:

2716

3200

del pidfile

2717

3201

del pidfilename

2718

3202

2719

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

2720

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

3203

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

3204

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3205

lambda: main_loop.quit() and False)

2721

3206

2722

3207

if use_dbus:

2723

3208

2724

3209

@alternate_dbus_interfaces(

2725

3210

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

2726

class MandosDBusService(DBusObjectWithProperties):

3211

class MandosDBusService(DBusObjectWithObjectManager):

2727

3212

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

2728

3213

2729

3214

def __init__(self):

2731

3216

2732

3217

_interface = "se.recompile.Mandos"

2733

3218

2734

@dbus_interface_annotations(_interface)

2735

def _foo(self):

2736

return {

2737

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

2738

"false" }

2739

2740

3219

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

2741

3220

def ClientAdded(self, objpath):

2742

3221

"D-Bus signal"

2747

3226

"D-Bus signal"

2748

3227

pass

2749

3228

3229

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

3230

"true"})

2750

3231

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

2751

3232

def ClientRemoved(self, objpath, name):

2752

3233

"D-Bus signal"

2753

3234

pass

2754

3235

3236

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

3237

"true"})

2755

3238

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

2756

3239

def GetAllClients(self):

2757

3240

"D-Bus method"

2758

3241

return dbus.Array(c.dbus_object_path for c in

2759

tcp_server.clients.itervalues())

3242

tcp_server.clients.values())

2760

3243

3244

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

3245

"true"})

2761

3246

@dbus.service.method(_interface,

2762

3247

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

2763

3248

def GetAllClientsWithProperties(self):

2764

3249

"D-Bus method"

2765

3250

return dbus.Dictionary(

2766

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

2767

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

3251

{ c.dbus_object_path: c.GetAll(

3252

"se.recompile.Mandos.Client")

3253

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

2768

3254

signature="oa{sv}")

2769

3255

2770

3256

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

2771

3257

def RemoveClient(self, object_path):

2772

3258

"D-Bus method"

2773

for c in tcp_server.clients.itervalues():

3259

for c in tcp_server.clients.values():

2774

3260

if c.dbus_object_path == object_path:

2775

3261

del tcp_server.clients[c.name]

2776

3262

c.remove_from_connection()

2777

# Don't signal anything except ClientRemoved

3263

# Don't signal the disabling

2778

3264

c.disable(quiet=True)

2779

# Emit D-Bus signal

2780

self.ClientRemoved(object_path, c.name)

3265

# Emit D-Bus signal for removal

3266

self.client_removed_signal(c)

2781

3267

return

2782

3268

raise KeyError(object_path)

2783

3269

2784

3270

del _interface

3271

3272

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3273

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

3274

def GetManagedObjects(self):

3275

"""D-Bus method"""

3276

return dbus.Dictionary(

3277

{ client.dbus_object_path:

3278

dbus.Dictionary(

3279

{ interface: client.GetAll(interface)

3280

for interface in

3281

client._get_all_interface_names()})

3282

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

3283

3284

def client_added_signal(self, client):

3285

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

3286

if use_dbus:

3287

# New standard signal

3288

self.InterfacesAdded(

3289

client.dbus_object_path,

3290

dbus.Dictionary(

3291

{ interface: client.GetAll(interface)

3292

for interface in

3293

client._get_all_interface_names()}))

3294

# Old signal

3295

self.ClientAdded(client.dbus_object_path)

3296

3297

def client_removed_signal(self, client):

3298

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

3299

if use_dbus:

3300

# New standard signal

3301

self.InterfacesRemoved(

3302

client.dbus_object_path,

3303

client._get_all_interface_names())

3304

# Old signal

3305

self.ClientRemoved(client.dbus_object_path,

3306

client.name)

2785

3307

2786

3308

mandos_dbus_service = MandosDBusService()

2787

3309

2800

3322

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

2801

3323

clients = {}

2802

3324

with PGPEngine() as pgp:

2803

for client in tcp_server.clients.itervalues():

3325

for client in tcp_server.clients.values():

2804

3326

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

2805

3327

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

2806

3328

key)

2830

3352

prefix='clients-',

2831

3353

dir=os.path.dirname(stored_state_path),

2832

3354

delete=False) as stored_state:

2833

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

3355

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

3356

protocol = 2)

2834

3357

tempname = stored_state.name

2835

3358

os.rename(tempname, stored_state_path)

2836

3359

except (IOError, OSError) as e:

2852

3375

name, client = tcp_server.clients.popitem()

2853

3376

if use_dbus:

2854

3377

client.remove_from_connection()

2855

# Don't signal anything except ClientRemoved

3378

# Don't signal the disabling

2856

3379

client.disable(quiet=True)

3380

# Emit D-Bus signal for removal

2857

3381

if use_dbus:

2858

# Emit D-Bus signal

2859

mandos_dbus_service.ClientRemoved(

2860

client.dbus_object_path, client.name)

3382

mandos_dbus_service.client_removed_signal(client)

2861

3383

client_settings.clear()

2862

3384

2863

3385

atexit.register(cleanup)

2864

3386

2865

for client in tcp_server.clients.itervalues():

3387

for client in tcp_server.clients.values():

2866

3388

if use_dbus:

2867

# Emit D-Bus signal

2868

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3389

# Emit D-Bus signal for adding

3390

mandos_dbus_service.client_added_signal(client)

2869

3391

# Need to initiate checking of clients

2870

3392

if client.enabled:

2871

3393

client.init_checker()

2897

3419

sys.exit(1)

2898

3420

# End of Avahi example code

2899

3421

2900

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

2901

lambda *args, **kwargs:

2902

(tcp_server.handle_request

2903

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

3422

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

3423

lambda *args, **kwargs:

3424

(tcp_server.handle_request

3425

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

2904

3426

2905

3427

logger.debug("Starting main loop")

2906

3428

main_loop.run()