/mandos/trunk : revision 866

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):

395

458

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

396

459

self.cleanup()

397

460

elif state == avahi.SERVER_RUNNING:

398

self.add()

461

try:

462

self.add()

463

except dbus.exceptions.DBusException as error:

464

if (error.get_dbus_name()

465

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

466

logger.info("Local Zeroconf service name"

467

" collision.")

468

return self.rename(remove=False)

469

else:

470

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

471

self.cleanup()

472

os._exit(1)

399

473

else:

400

474

if error is None:

401

475

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

424

498

.format(self.name)))

425

499

return ret

426

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

427

756

def call_pipe(connection, # : multiprocessing.Connection

428

757

func, *args, **kwargs):

429

758

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

444

773

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

445

774

to see if the client lives.

446

775

'None' if no process is running.

447

checker_callback_tag: a gobject event source tag, or None

776

checker_callback_tag: a GLib event source tag, or None

448

777

checker_command: string; External command which is run to check

449

778

if client lives. %() expansions are done at

450

779

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

451

780

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

452

checker_initiator_tag: a gobject event source tag, or None

781

checker_initiator_tag: a GLib event source tag, or None

453

782

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

454

783

client_structure: Object describing what attributes a client has

455

784

and is used for storing the client at exit

456

785

current_checker_command: string; current running checker_command

457

disable_initiator_tag: a gobject event source tag, or None

786

disable_initiator_tag: a GLib event source tag, or None

458

787

enabled: bool()

459

788

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

460

789

uniquely identify the client

523

852

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

524

853

.replace(" ", ""))

525

854

if "secret" in section:

526

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

855

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

856

.encode("utf-8"),

857

"base64")

527

858

elif "secfile" in section:

528

859

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

529

860

(section["secfile"])),

582

913

self.changedstate = multiprocessing_manager.Condition(

583

914

multiprocessing_manager.Lock())

584

915

self.client_structure = [attr

585

for attr in self.__dict__.iterkeys()

916

for attr in self.__dict__.keys()

586

917

if not attr.startswith("_")]

587

918

self.client_structure.append("client_structure")

588

919

614

945

if not quiet:

615

946

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

616

947

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

617

gobject.source_remove(self.disable_initiator_tag)

948

GLib.source_remove(self.disable_initiator_tag)

618

949

self.disable_initiator_tag = None

619

950

self.expires = None

620

951

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

621

gobject.source_remove(self.checker_initiator_tag)

952

GLib.source_remove(self.checker_initiator_tag)

622

953

self.checker_initiator_tag = None

623

954

self.stop_checker()

624

955

self.enabled = False

625

956

if not quiet:

626

957

self.send_changedstate()

627

# 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

628

959

return False

629

960

630

961

def __del__(self):

634

965

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

635

966

# and every interval from then on.

636

967

if self.checker_initiator_tag is not None:

637

gobject.source_remove(self.checker_initiator_tag)

638

self.checker_initiator_tag = gobject.timeout_add(

968

GLib.source_remove(self.checker_initiator_tag)

969

self.checker_initiator_tag = GLib.timeout_add(

639

970

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

640

971

self.start_checker)

641

972

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

642

973

if self.disable_initiator_tag is not None:

643

gobject.source_remove(self.disable_initiator_tag)

644

self.disable_initiator_tag = gobject.timeout_add(

974

GLib.source_remove(self.disable_initiator_tag)

975

self.disable_initiator_tag = GLib.timeout_add(

645

976

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

646

977

# Also start a new checker *right now*.

647

978

self.start_checker()

683

1014

if timeout is None:

684

1015

timeout = self.timeout

685

1016

if self.disable_initiator_tag is not None:

686

gobject.source_remove(self.disable_initiator_tag)

1017

GLib.source_remove(self.disable_initiator_tag)

687

1018

self.disable_initiator_tag = None

688

1019

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

689

self.disable_initiator_tag = gobject.timeout_add(

1020

self.disable_initiator_tag = GLib.timeout_add(

690

1021

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

691

1022

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

692

1023

747

1078

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

748

1079

kwargs = popen_args)

749

1080

self.checker.start()

750

self.checker_callback_tag = gobject.io_add_watch(

751

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

1081

self.checker_callback_tag = GLib.io_add_watch(

1082

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

752

1083

self.checker_callback, pipe[0], command)

753

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

1084

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

754

1085

return True

755

1086

756

1087

def stop_checker(self):

757

1088

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

758

1089

if self.checker_callback_tag:

759

gobject.source_remove(self.checker_callback_tag)

1090

GLib.source_remove(self.checker_callback_tag)

760

1091

self.checker_callback_tag = None

761

1092

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

762

1093

return

831

1162

access="r")

832

1163

def Property_dbus_property(self):

833

1164

return dbus.Boolean(False)

1165

1166

See also the DBusObjectWithAnnotations class.

834

1167

"""

835

1168

836

1169

def decorator(func):

858

1191

pass

859

1192

860

1193

861

class DBusObjectWithProperties(dbus.service.Object):

862

"""A D-Bus object with properties.

1194

class DBusObjectWithAnnotations(dbus.service.Object):

1195

"""A D-Bus object with annotations.

863

1196

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.

1197

Classes inheriting from this can use the dbus_annotations

1198

decorator to add annotations to methods or signals.

867

1199

"""

868

1200

869

1201

@staticmethod

885

1217

for name, athing in

886

1218

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

887

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

888

1291

def _get_dbus_property(self, interface_name, property_name):

889

1292

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

890

1293

property with the specified name and interface.

900

1303

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

901

1304

self.dbus_object_path, interface_name, property_name))

902

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

903

1315

@dbus.service.method(dbus.PROPERTIES_IFACE,

904

1316

in_signature="ss",

905

1317

out_signature="v")

975

1387

976

1388

Inserts property tags and interface annotation tags.

977

1389

"""

978

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

979

connection)

1390

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1391

object_path,

1392

connection)

980

1393

try:

981

1394

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

982

1395

995

1408

if prop._dbus_interface

996

1409

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

997

1410

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)

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)

1027

1427

# Add the names to the return values for the

1028

1428

# "org.freedesktop.DBus.Properties" methods

1029

1429

if (if_tag.getAttribute("name")

1047

1447

exc_info=error)

1048

1448

return xmlstring

1049

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

1050

1518

1051

1519

def datetime_to_dbus(dt, variant_level=0):

1052

1520

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

1099

1567

interface_names.add(alt_interface)

1100

1568

# Is this a D-Bus signal?

1101

1569

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

1570

# Extract the original non-method undecorated

1571

# function by black magic

1102

1572

if sys.version_info.major == 2:

1103

# Extract the original non-method undecorated

1104

# function by black magic

1105

1573

nonmethod_func = (dict(

1106

1574

zip(attribute.func_code.co_freevars,

1107

1575

attribute.__closure__))

1108

1576

["func"].cell_contents)

1109

1577

else:

1110

nonmethod_func = attribute

1578

nonmethod_func = (dict(

1579

zip(attribute.__code__.co_freevars,

1580

attribute.__closure__))

1581

["func"].cell_contents)

1111

1582

# Create a new, but exactly alike, function

1112

1583

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

1113

1584

# 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__)

1585

new_function = copy_function(nonmethod_func)

1128

1586

new_function = (dbus.service.signal(

1129

1587

alt_interface,

1130

1588

attribute._dbus_signature)(new_function))

1143

1601

func1 and func2 to the "call_both" function

1144

1602

outside of its arguments"""

1145

1603

1604

@functools.wraps(func2)

1146

1605

def call_both(*args, **kwargs):

1147

1606

"""This function will emit two D-Bus

1148

1607

signals by calling func1 and func2"""

1149

1608

func1(*args, **kwargs)

1150

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)

1151

1614

1152

1615

return call_both

1153

1616

# Create the "call_both" function and add it to

1164

1627

alt_interface,

1165

1628

attribute._dbus_in_signature,

1166

1629

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)))

1630

(copy_function(attribute)))

1172

1631

# Copy annotations, if any

1173

1632

try:

1174

1633

attr[attrname]._dbus_annotations = dict(

1186

1645

attribute._dbus_access,

1187

1646

attribute._dbus_get_args_options

1188

1647

["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)))

1648

(copy_function(attribute)))

1195

1649

# Copy annotations, if any

1196

1650

try:

1197

1651

attr[attrname]._dbus_annotations = dict(

1206

1660

# to the class.

1207

1661

attr[attrname] = (

1208

1662

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)))

1663

(copy_function(attribute)))

1214

1664

if deprecate:

1215

1665

# Deprecate all alternate interfaces

1216

1666

iname="_AlternateDBusNames_interface_annotation{}"

1229

1679

if interface_names:

1230

1680

# Replace the class with a new subclass of it with

1231

1681

# methods, signals, etc. as created above.

1232

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

1233

(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)

1234

1688

return cls

1235

1689

1236

1690

return wrapper

1365

1819

if exitstatus >= 0:

1366

1820

# Emit D-Bus signal

1367

1821

self.CheckerCompleted(dbus.Int16(exitstatus),

1368

dbus.Int64(0),

1822

# This is specific to GNU libC

1823

dbus.Int64(exitstatus << 8),

1369

1824

dbus.String(command))

1370

1825

else:

1371

1826

# Emit D-Bus signal

1372

1827

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

1373

1828

dbus.Int64(

1374

self.last_checker_signal),

1829

# This is specific to GNU libC

1830

(exitstatus << 8)

1831

| self.last_checker_signal),

1375

1832

dbus.String(command))

1376

1833

return ret

1377

1834

1391

1848

1392

1849

def approve(self, value=True):

1393

1850

self.approved = value

1394

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

1395

* 1000), self._reset_approved)

1851

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

1852

* 1000), self._reset_approved)

1396

1853

self.send_changedstate()

1397

1854

1398

1855

## D-Bus methods, signals & properties

1454

1911

self.checked_ok()

1455

1912

1456

1913

# Enable - method

1914

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

1457

1915

@dbus.service.method(_interface)

1458

1916

def Enable(self):

1459

1917

"D-Bus method"

1460

1918

self.enable()

1461

1919

1462

1920

# StartChecker - method

1921

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

1463

1922

@dbus.service.method(_interface)

1464

1923

def StartChecker(self):

1465

1924

"D-Bus method"

1466

1925

self.start_checker()

1467

1926

1468

1927

# Disable - method

1928

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

1469

1929

@dbus.service.method(_interface)

1470

1930

def Disable(self):

1471

1931

"D-Bus method"

1472

1932

self.disable()

1473

1933

1474

1934

# StopChecker - method

1935

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

1475

1936

@dbus.service.method(_interface)

1476

1937

def StopChecker(self):

1477

1938

self.stop_checker()

1513

1974

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

1514

1975

1515

1976

# Name - property

1977

@dbus_annotations(

1978

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

1516

1979

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

1517

1980

def Name_dbus_property(self):

1518

1981

return dbus.String(self.name)

1519

1982

1520

1983

# Fingerprint - property

1984

@dbus_annotations(

1985

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

1521

1986

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

1522

1987

def Fingerprint_dbus_property(self):

1523

1988

return dbus.String(self.fingerprint)

1532

1997

self.host = str(value)

1533

1998

1534

1999

# Created - property

2000

@dbus_annotations(

2001

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

1535

2002

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

1536

2003

def Created_dbus_property(self):

1537

2004

return datetime_to_dbus(self.created)

1598

2065

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

1599

2066

is None):

1600

2067

return

1601

gobject.source_remove(self.disable_initiator_tag)

1602

self.disable_initiator_tag = gobject.timeout_add(

2068

GLib.source_remove(self.disable_initiator_tag)

2069

self.disable_initiator_tag = GLib.timeout_add(

1603

2070

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

1604

2071

self.disable)

1605

2072

1625

2092

return

1626

2093

if self.enabled:

1627

2094

# Reschedule checker run

1628

gobject.source_remove(self.checker_initiator_tag)

1629

self.checker_initiator_tag = gobject.timeout_add(

2095

GLib.source_remove(self.checker_initiator_tag)

2096

self.checker_initiator_tag = GLib.timeout_add(

1630

2097

value, self.start_checker)

1631

2098

self.start_checker() # Start one now, too

1632

2099

1652

2119

self.stop_checker()

1653

2120

1654

2121

# ObjectPath - property

2122

@dbus_annotations(

2123

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

2124

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

1655

2125

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

1656

2126

def ObjectPath_dbus_property(self):

1657

2127

return self.dbus_object_path # is already a dbus.ObjectPath

1658

2128

1659

2129

# Secret = property

2130

@dbus_annotations(

2131

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

2132

"invalidates"})

1660

2133

@dbus_service_property(_interface,

1661

2134

signature="ay",

1662

2135

access="write",

1708

2181

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

1709

2182

self.server.child_pipe.fileno())

1710

2183

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.

2184

session = gnutls.ClientSession(self.request)

1718

2185

1719

2186

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

1720

2187

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

1724

2191

priority = self.server.gnutls_priority

1725

2192

if priority is None:

1726

2193

priority = "NORMAL"

1727

gnutls.library.functions.gnutls_priority_set_direct(

1728

session._c_object, priority, None)

2194

gnutls.priority_set_direct(session._c_object,

2195

priority.encode("utf-8"),

2196

None)

1729

2197

1730

2198

# Start communication using the Mandos protocol

1731

2199

# Get protocol number

1741

2209

# Start GnuTLS connection

1742

2210

try:

1743

2211

session.handshake()

1744

except gnutls.errors.GNUTLSError as error:

2212

except gnutls.Error as error:

1745

2213

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

1746

2214

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

1747

2215

# established. Just abandon the request.

1753

2221

try:

1754

2222

fpr = self.fingerprint(

1755

2223

self.peer_certificate(session))

1756

except (TypeError,

1757

gnutls.errors.GNUTLSError) as error:

2224

except (TypeError, gnutls.Error) as error:

1758

2225

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

1759

2226

return

1760

2227

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

1818

2285

else:

1819

2286

delay -= time2 - time

1820

2287

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

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

1833

2294

1834

2295

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

1835

2296

# bump the timeout using extended_timeout

1843

2304

client.approvals_pending -= 1

1844

2305

try:

1845

2306

session.bye()

1846

except gnutls.errors.GNUTLSError as error:

2307

except gnutls.Error as error:

1847

2308

logger.warning("GnuTLS bye failed",

1848

2309

exc_info=error)

1849

2310

1851

2312

def peer_certificate(session):

1852

2313

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

1853

2314

# 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

2315

if (gnutls.certificate_type_get(session._c_object)

2316

!= gnutls.CRT_OPENPGP):

2317

# ...return invalid data

2318

return b""

1859

2319

list_size = ctypes.c_uint(1)

1860

cert_list = (gnutls.library.functions

1861

.gnutls_certificate_get_peers

2320

cert_list = (gnutls.certificate_get_peers

1862

2321

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

1863

2322

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

1864

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

1865

" certificate")

2323

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

1866

2324

if list_size.value == 0:

1867

2325

return None

1868

2326

cert = cert_list[0]

1872

2330

def fingerprint(openpgp):

1873

2331

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1874

2332

# New GnuTLS "datum" with the OpenPGP public key

1875

datum = gnutls.library.types.gnutls_datum_t(

2333

datum = gnutls.datum_t(

1876

2334

ctypes.cast(ctypes.c_char_p(openpgp),

1877

2335

ctypes.POINTER(ctypes.c_ubyte)),

1878

2336

ctypes.c_uint(len(openpgp)))

1879

2337

# 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))

2338

crt = gnutls.openpgp_crt_t()

2339

gnutls.openpgp_crt_init(ctypes.byref(crt))

1883

2340

# 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)

2341

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

2342

gnutls.OPENPGP_FMT_RAW)

1887

2343

# Verify the self signature in the key

1888

2344

crtverify = ctypes.c_uint()

1889

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1890

crt, 0, ctypes.byref(crtverify))

2345

gnutls.openpgp_crt_verify_self(crt, 0,

2346

ctypes.byref(crtverify))

1891

2347

if crtverify.value != 0:

1892

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1893

raise gnutls.errors.CertificateSecurityError(

1894

"Verify failed")

2348

gnutls.openpgp_crt_deinit(crt)

2349

raise gnutls.CertificateSecurityError("Verify failed")

1895

2350

# New buffer for the fingerprint

1896

2351

buf = ctypes.create_string_buffer(20)

1897

2352

buf_len = ctypes.c_size_t()

1898

2353

# 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))

2354

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

2355

ctypes.byref(buf_len))

1901

2356

# Deinit the certificate

1902

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2357

gnutls.openpgp_crt_deinit(crt)

1903

2358

# Convert the buffer to a Python bytestring

1904

2359

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

1905

2360

# Convert the bytestring to hexadecimal notation

1998

2453

"""This overrides the normal server_bind() function

1999

2454

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

2000

2455

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

2456

global SO_BINDTODEVICE

2001

2457

if self.interface is not None:

2002

2458

if SO_BINDTODEVICE is None:

2003

logger.error("SO_BINDTODEVICE does not exist;"

2004

" cannot bind to interface %s",

2005

self.interface)

2006

else:

2007

try:

2008

self.socket.setsockopt(

2009

socket.SOL_SOCKET, SO_BINDTODEVICE,

2010

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

2011

except socket.error as error:

2012

if error.errno == errno.EPERM:

2013

logger.error("No permission to bind to"

2014

" interface %s", self.interface)

2015

elif error.errno == errno.ENOPROTOOPT:

2016

logger.error("SO_BINDTODEVICE not available;"

2017

" cannot bind to interface %s",

2018

self.interface)

2019

elif error.errno == errno.ENODEV:

2020

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

2021

" cannot bind", self.interface)

2022

else:

2023

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

2024

2480

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

2025

2481

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

2026

2482

if not self.server_address[0]:

2049

2505

gnutls_priority GnuTLS priority string

2050

2506

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

2051

2507

2052

Assumes a gobject.MainLoop event loop.

2508

Assumes a GLib.MainLoop event loop.

2053

2509

"""

2054

2510

2055

2511

def __init__(self, server_address, RequestHandlerClass,

2080

2536

2081

2537

def add_pipe(self, parent_pipe, proc):

2082

2538

# Call "handle_ipc" for both data and EOF events

2083

gobject.io_add_watch(

2539

GLib.io_add_watch(

2084

2540

parent_pipe.fileno(),

2085

gobject.IO_IN | gobject.IO_HUP,

2541

GLib.IO_IN | GLib.IO_HUP,

2086

2542

functools.partial(self.handle_ipc,

2087

2543

parent_pipe = parent_pipe,

2088

2544

proc = proc))

2092

2548

proc = None,

2093

2549

client_object=None):

2094

2550

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

2095

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

2551

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

2096

2552

# Wait for other process to exit

2097

2553

proc.join()

2098

2554

return False

2105

2561

fpr = request[1]

2106

2562

address = request[2]

2107

2563

2108

for c in self.clients.itervalues():

2564

for c in self.clients.values():

2109

2565

if c.fingerprint == fpr:

2110

2566

client = c

2111

2567

break

2119

2575

parent_pipe.send(False)

2120

2576

return False

2121

2577

2122

gobject.io_add_watch(

2578

GLib.io_add_watch(

2123

2579

parent_pipe.fileno(),

2124

gobject.IO_IN | gobject.IO_HUP,

2580

GLib.IO_IN | GLib.IO_HUP,

2125

2581

functools.partial(self.handle_ipc,

2126

2582

parent_pipe = parent_pipe,

2127

2583

proc = proc,

2386

2842

"debug": "False",

2387

2843

"priority":

2388

2844

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

2389

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

2845

":+SIGN-DSA-SHA256",

2390

2846

"servicename": "Mandos",

2391

2847

"use_dbus": "True",

2392

2848

"use_ipv6": "True",

2509

2965

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

2510

2966

exc_info=e)

2511

2967

2512

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

2968

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

2969

("mandos", "mandos"),

2970

("nobody", "nogroup")):

2513

2971

try:

2514

2972

uid = pwd.getpwnam(name).pw_uid

2515

gid = pwd.getpwnam(name).pw_gid

2973

gid = pwd.getpwnam(group).pw_gid

2516

2974

break

2517

2975

except KeyError:

2518

2976

continue

2522

2980

try:

2523

2981

os.setgid(gid)

2524

2982

os.setuid(uid)

2983

if debug:

2984

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

2985

gid))

2525

2986

except OSError as error:

2987

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

2988

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

2526

2989

if error.errno != errno.EPERM:

2527

2990

raise

2528

2991

2531

2994

2532

2995

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

2533

2996

# - GnuTLS manual

2534

gnutls.library.functions.gnutls_global_set_log_level(11)

2997

gnutls.global_set_log_level(11)

2535

2998

2536

@gnutls.library.types.gnutls_log_func

2999

@gnutls.log_func

2537

3000

def debug_gnutls(level, string):

2538

3001

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

2539

3002

2540

gnutls.library.functions.gnutls_global_set_log_function(

2541

debug_gnutls)

3003

gnutls.global_set_log_function(debug_gnutls)

2542

3004

2543

3005

# Redirect stdin so all checkers get /dev/null

2544

3006

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

2551

3013

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

2552

3014

daemon()

2553

3015

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()

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()

2557

3019

2558

3020

global main_loop

2559

3021

# From the Avahi example code

2560

3022

DBusGMainLoop(set_as_default=True)

2561

main_loop = gobject.MainLoop()

3023

main_loop = GLib.MainLoop()

2562

3024

bus = dbus.SystemBus()

2563

3025

# End of Avahi example code

2564

3026

if use_dbus:

2608

3070

if server_settings["restore"]:

2609

3071

try:

2610

3072

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

2611

clients_data, old_client_settings = pickle.load(

2612

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"))

2613

3118

os.remove(stored_state_path)

2614

3119

except IOError as e:

2615

3120

if e.errno == errno.ENOENT:

2716

3221

del pidfile

2717

3222

del pidfilename

2718

3223

2719

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

2720

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)

2721

3227

2722

3228

if use_dbus:

2723

3229

2724

3230

@alternate_dbus_interfaces(

2725

3231

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

2726

class MandosDBusService(DBusObjectWithProperties):

3232

class MandosDBusService(DBusObjectWithObjectManager):

2727

3233

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

2728

3234

2729

3235

def __init__(self):

2731

3237

2732

3238

_interface = "se.recompile.Mandos"

2733

3239

2734

@dbus_interface_annotations(_interface)

2735

def _foo(self):

2736

return {

2737

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

2738

"false" }

2739

2740

3240

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

2741

3241

def ClientAdded(self, objpath):

2742

3242

"D-Bus signal"

2747

3247

"D-Bus signal"

2748

3248

pass

2749

3249

3250

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

3251

"true"})

2750

3252

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

2751

3253

def ClientRemoved(self, objpath, name):

2752

3254

"D-Bus signal"

2753

3255

pass

2754

3256

3257

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

3258

"true"})

2755

3259

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

2756

3260

def GetAllClients(self):

2757

3261

"D-Bus method"

2758

3262

return dbus.Array(c.dbus_object_path for c in

2759

tcp_server.clients.itervalues())

3263

tcp_server.clients.values())

2760

3264

3265

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

3266

"true"})

2761

3267

@dbus.service.method(_interface,

2762

3268

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

2763

3269

def GetAllClientsWithProperties(self):

2764

3270

"D-Bus method"

2765

3271

return dbus.Dictionary(

2766

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

2767

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() },

2768

3275

signature="oa{sv}")

2769

3276

2770

3277

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

2771

3278

def RemoveClient(self, object_path):

2772

3279

"D-Bus method"

2773

for c in tcp_server.clients.itervalues():

3280

for c in tcp_server.clients.values():

2774

3281

if c.dbus_object_path == object_path:

2775

3282

del tcp_server.clients[c.name]

2776

3283

c.remove_from_connection()

2777

# Don't signal anything except ClientRemoved

3284

# Don't signal the disabling

2778

3285

c.disable(quiet=True)

2779

# Emit D-Bus signal

2780

self.ClientRemoved(object_path, c.name)

3286

# Emit D-Bus signal for removal

3287

self.client_removed_signal(c)

2781

3288

return

2782

3289

raise KeyError(object_path)

2783

3290

2784

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)

2785

3328

2786

3329

mandos_dbus_service = MandosDBusService()

2787

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

2788

3335

def cleanup():

2789

3336

"Cleanup function; run on exit"

2790

3337

if zeroconf:

2791

3338

service.cleanup()

2792

3339

2793

multiprocessing.active_children()

2794

wnull.close()

3340

mp.active_children()

3341

wn.close()

2795

3342

if not (tcp_server.clients or client_settings):

2796

3343

return

2797

3344

2800

3347

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

2801

3348

clients = {}

2802

3349

with PGPEngine() as pgp:

2803

for client in tcp_server.clients.itervalues():

3350

for client in tcp_server.clients.values():

2804

3351

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

2805

3352

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

2806

3353

key)

2830

3377

prefix='clients-',

2831

3378

dir=os.path.dirname(stored_state_path),

2832

3379

delete=False) as stored_state:

2833

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

3380

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

3381

protocol = 2)

2834

3382

tempname = stored_state.name

2835

3383

os.rename(tempname, stored_state_path)

2836

3384

except (IOError, OSError) as e:

2852

3400

name, client = tcp_server.clients.popitem()

2853

3401

if use_dbus:

2854

3402

client.remove_from_connection()

2855

# Don't signal anything except ClientRemoved

3403

# Don't signal the disabling

2856

3404

client.disable(quiet=True)

3405

# Emit D-Bus signal for removal

2857

3406

if use_dbus:

2858

# Emit D-Bus signal

2859

mandos_dbus_service.ClientRemoved(

2860

client.dbus_object_path, client.name)

3407

mandos_dbus_service.client_removed_signal(client)

2861

3408

client_settings.clear()

2862

3409

2863

3410

atexit.register(cleanup)

2864

3411

2865

for client in tcp_server.clients.itervalues():

3412

for client in tcp_server.clients.values():

2866

3413

if use_dbus:

2867

# Emit D-Bus signal

2868

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3414

# Emit D-Bus signal for adding

3415

mandos_dbus_service.client_added_signal(client)

2869

3416

# Need to initiate checking of clients

2870

3417

if client.enabled:

2871

3418

client.init_checker()

2897

3444

sys.exit(1)

2898

3445

# End of Avahi example code

2899

3446

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))

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))

2904

3451

2905

3452

logger.debug("Starting main loop")

2906

3453

main_loop.run()