/mandos/trunk : revision 777

1

#!/usr/bin/python

1

#!/usr/bin/python2.7

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

try:

38

from future_builtins import *

39

except ImportError:

40

pass

37

from future_builtins import *

41

38

42

39

try:

43

40

import SocketServer as socketserver

47

44

import argparse

48

45

import datetime

49

46

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

50

53

try:

51

54

import ConfigParser as configparser

52

55

except ImportError:

79

82

80

83

import dbus

81

84

import dbus.service

82

from gi.repository import GLib

85

try:

86

import gobject

87

except ImportError:

88

from gi.repository import GObject as gobject

89

import avahi

83

90

from dbus.mainloop.glib import DBusGMainLoop

84

91

import ctypes

85

92

import ctypes.util

97

104

if sys.version_info.major == 2:

98

105

str = unicode

99

106

100

version = "1.7.7"

107

version = "1.6.9"

101

108

stored_state_file = "clients.pickle"

102

109

103

110

logger = logging.getLogger()

118

125

return interface_index

119

126

120

127

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

137

128

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

138

129

"""init logger and add loglevel"""

139

130

166

157

167

158

def __init__(self):

168

159

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

180

160

self.gnupgargs = ['--batch',

181

'--homedir', self.tempdir,

161

'--home', self.tempdir,

182

162

'--force-mdc',

183

163

'--quiet',

184

164

'--no-use-agent']

223

203

dir=self.tempdir) as passfile:

224

204

passfile.write(passphrase)

225

205

passfile.flush()

226

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

206

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

227

207

'--passphrase-file',

228

208

passfile.name]

229

209

+ self.gnupgargs,

241

221

dir = self.tempdir) as passfile:

242

222

passfile.write(passphrase)

243

223

passfile.flush()

244

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

224

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

245

225

'--passphrase-file',

246

226

passfile.name]

247

227

+ self.gnupgargs,

253

233

raise PGPError(err)

254

234

return decrypted_plaintext

255

235

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()

280

236

281

237

class AvahiError(Exception):

282

238

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

479

435

.format(self.name)))

480

436

return ret

481

437

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

737

438

def call_pipe(connection, # : multiprocessing.Connection

738

439

func, *args, **kwargs):

739

440

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

754

455

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

755

456

to see if the client lives.

756

457

'None' if no process is running.

757

checker_callback_tag: a GLib event source tag, or None

458

checker_callback_tag: a gobject event source tag, or None

758

459

checker_command: string; External command which is run to check

759

460

if client lives. %() expansions are done at

760

461

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

761

462

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

762

checker_initiator_tag: a GLib event source tag, or None

463

checker_initiator_tag: a gobject event source tag, or None

763

464

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

764

465

client_structure: Object describing what attributes a client has

765

466

and is used for storing the client at exit

766

467

current_checker_command: string; current running checker_command

767

disable_initiator_tag: a GLib event source tag, or None

468

disable_initiator_tag: a gobject event source tag, or None

768

469

enabled: bool()

769

470

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

770

471

uniquely identify the client

833

534

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

834

535

.replace(" ", ""))

835

536

if "secret" in section:

836

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

837

.encode("utf-8"),

838

"base64")

537

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

839

538

elif "secfile" in section:

840

539

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

841

540

(section["secfile"])),

894

593

self.changedstate = multiprocessing_manager.Condition(

895

594

multiprocessing_manager.Lock())

896

595

self.client_structure = [attr

897

for attr in self.__dict__.keys()

596

for attr in self.__dict__.iterkeys()

898

597

if not attr.startswith("_")]

899

598

self.client_structure.append("client_structure")

900

599

926

625

if not quiet:

927

626

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

928

627

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

929

GLib.source_remove(self.disable_initiator_tag)

628

gobject.source_remove(self.disable_initiator_tag)

930

629

self.disable_initiator_tag = None

931

630

self.expires = None

932

631

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

933

GLib.source_remove(self.checker_initiator_tag)

632

gobject.source_remove(self.checker_initiator_tag)

934

633

self.checker_initiator_tag = None

935

634

self.stop_checker()

936

635

self.enabled = False

937

636

if not quiet:

938

637

self.send_changedstate()

939

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

638

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

940

639

return False

941

640

942

641

def __del__(self):

946

645

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

947

646

# and every interval from then on.

948

647

if self.checker_initiator_tag is not None:

949

GLib.source_remove(self.checker_initiator_tag)

950

self.checker_initiator_tag = GLib.timeout_add(

648

gobject.source_remove(self.checker_initiator_tag)

649

self.checker_initiator_tag = gobject.timeout_add(

951

650

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

952

651

self.start_checker)

953

652

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

954

653

if self.disable_initiator_tag is not None:

955

GLib.source_remove(self.disable_initiator_tag)

956

self.disable_initiator_tag = GLib.timeout_add(

654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = gobject.timeout_add(

957

656

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

958

657

# Also start a new checker *right now*.

959

658

self.start_checker()

995

694

if timeout is None:

996

695

timeout = self.timeout

997

696

if self.disable_initiator_tag is not None:

998

GLib.source_remove(self.disable_initiator_tag)

697

gobject.source_remove(self.disable_initiator_tag)

999

698

self.disable_initiator_tag = None

1000

699

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

1001

self.disable_initiator_tag = GLib.timeout_add(

700

self.disable_initiator_tag = gobject.timeout_add(

1002

701

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

1003

702

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

1004

703

1059

758

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

1060

759

kwargs = popen_args)

1061

760

self.checker.start()

1062

self.checker_callback_tag = GLib.io_add_watch(

1063

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

761

self.checker_callback_tag = gobject.io_add_watch(

762

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

1064

763

self.checker_callback, pipe[0], command)

1065

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

764

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

1066

765

return True

1067

766

1068

767

def stop_checker(self):

1069

768

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

1070

769

if self.checker_callback_tag:

1071

GLib.source_remove(self.checker_callback_tag)

770

gobject.source_remove(self.checker_callback_tag)

1072

771

self.checker_callback_tag = None

1073

772

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

1074

773

return

1143

842

access="r")

1144

843

def Property_dbus_property(self):

1145

844

return dbus.Boolean(False)

1146

1147

See also the DBusObjectWithAnnotations class.

1148

845

"""

1149

846

1150

847

def decorator(func):

1172

869

pass

1173

870

1174

871

1175

class DBusObjectWithAnnotations(dbus.service.Object):

1176

"""A D-Bus object with annotations.

872

class DBusObjectWithProperties(dbus.service.Object):

873

"""A D-Bus object with properties.

1177

874

1178

Classes inheriting from this can use the dbus_annotations

1179

decorator to add annotations to methods or signals.

875

Classes inheriting from this can use the dbus_service_property

876

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

877

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

1180

878

"""

1181

879

1182

880

@staticmethod

1198

896

for name, athing in

1199

897

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

1200

898

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

1272

899

def _get_dbus_property(self, interface_name, property_name):

1273

900

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

1274

901

property with the specified name and interface.

1284

911

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

1285

912

self.dbus_object_path, interface_name, property_name))

1286

913

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

1296

914

@dbus.service.method(dbus.PROPERTIES_IFACE,

1297

915

in_signature="ss",

1298

916

out_signature="v")

1368

986

1369

987

Inserts property tags and interface annotation tags.

1370

988

"""

1371

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1372

object_path,

1373

connection)

989

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

990

connection)

1374

991

try:

1375

992

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

1376

993

1389

1006

if prop._dbus_interface

1390

1007

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

1391

1008

if_tag.appendChild(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)

1009

# Add annotation tags

1010

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

1011

for tag in if_tag.getElementsByTagName(typ):

1012

annots = dict()

1013

for name, prop in (self.

1014

_get_all_dbus_things(typ)):

1015

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

1016

and prop._dbus_interface

1017

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

1018

annots.update(getattr(

1019

prop, "_dbus_annotations", {}))

1020

for name, value in annots.items():

1021

ann_tag = document.createElement(

1022

"annotation")

1023

ann_tag.setAttribute("name", name)

1024

ann_tag.setAttribute("value", value)

1025

tag.appendChild(ann_tag)

1026

# Add interface annotation tags

1027

for annotation, value in dict(

1028

itertools.chain.from_iterable(

1029

annotations().items()

1030

for name, annotations

1031

in self._get_all_dbus_things("interface")

1032

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

1033

)).items():

1034

ann_tag = document.createElement("annotation")

1035

ann_tag.setAttribute("name", annotation)

1036

ann_tag.setAttribute("value", value)

1037

if_tag.appendChild(ann_tag)

1408

1038

# Add the names to the return values for the

1409

1039

# "org.freedesktop.DBus.Properties" methods

1410

1040

if (if_tag.getAttribute("name")

1428

1058

exc_info=error)

1429

1059

return xmlstring

1430

1060

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

1499

1061

1500

1062

def datetime_to_dbus(dt, variant_level=0):

1501

1063

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

1548

1110

interface_names.add(alt_interface)

1549

1111

# Is this a D-Bus signal?

1550

1112

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

1551

# Extract the original non-method undecorated

1552

# function by black magic

1553

1113

if sys.version_info.major == 2:

1114

# Extract the original non-method undecorated

1115

# function by black magic

1554

1116

nonmethod_func = (dict(

1555

1117

zip(attribute.func_code.co_freevars,

1556

1118

attribute.__closure__))

1557

1119

["func"].cell_contents)

1558

1120

else:

1559

nonmethod_func = (dict(

1560

zip(attribute.__code__.co_freevars,

1561

attribute.__closure__))

1562

["func"].cell_contents)

1121

nonmethod_func = attribute

1563

1122

# Create a new, but exactly alike, function

1564

1123

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

1565

1124

# with the alternate D-Bus interface name

1566

new_function = copy_function(nonmethod_func)

1125

if sys.version_info.major == 2:

1126

new_function = types.FunctionType(

1127

nonmethod_func.func_code,

1128

nonmethod_func.func_globals,

1129

nonmethod_func.func_name,

1130

nonmethod_func.func_defaults,

1131

nonmethod_func.func_closure)

1132

else:

1133

new_function = types.FunctionType(

1134

nonmethod_func.__code__,

1135

nonmethod_func.__globals__,

1136

nonmethod_func.__name__,

1137

nonmethod_func.__defaults__,

1138

nonmethod_func.__closure__)

1567

1139

new_function = (dbus.service.signal(

1568

1140

alt_interface,

1569

1141

attribute._dbus_signature)(new_function))

1582

1154

func1 and func2 to the "call_both" function

1583

1155

outside of its arguments"""

1584

1156

1585

@functools.wraps(func2)

1586

1157

def call_both(*args, **kwargs):

1587

1158

"""This function will emit two D-Bus

1588

1159

signals by calling func1 and func2"""

1589

1160

func1(*args, **kwargs)

1590

1161

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)

1595

1162

1596

1163

return call_both

1597

1164

# Create the "call_both" function and add it to

1608

1175

alt_interface,

1609

1176

attribute._dbus_in_signature,

1610

1177

attribute._dbus_out_signature)

1611

(copy_function(attribute)))

1178

(types.FunctionType(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1612

1183

# Copy annotations, if any

1613

1184

try:

1614

1185

attr[attrname]._dbus_annotations = dict(

1626

1197

attribute._dbus_access,

1627

1198

attribute._dbus_get_args_options

1628

1199

["byte_arrays"])

1629

(copy_function(attribute)))

1200

(types.FunctionType(

1201

attribute.func_code,

1202

attribute.func_globals,

1203

attribute.func_name,

1204

attribute.func_defaults,

1205

attribute.func_closure)))

1630

1206

# Copy annotations, if any

1631

1207

try:

1632

1208

attr[attrname]._dbus_annotations = dict(

1641

1217

# to the class.

1642

1218

attr[attrname] = (

1643

1219

dbus_interface_annotations(alt_interface)

1644

(copy_function(attribute)))

1220

(types.FunctionType(attribute.func_code,

1221

attribute.func_globals,

1222

attribute.func_name,

1223

attribute.func_defaults,

1224

attribute.func_closure)))

1645

1225

if deprecate:

1646

1226

# Deprecate all alternate interfaces

1647

1227

iname="_AlternateDBusNames_interface_annotation{}"

1660

1240

if interface_names:

1661

1241

# Replace the class with a new subclass of it with

1662

1242

# methods, signals, etc. as created above.

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)

1243

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

1244

(cls, ), attr)

1669

1245

return cls

1670

1246

1671

1247

return wrapper

1800

1376

if exitstatus >= 0:

1801

1377

# Emit D-Bus signal

1802

1378

self.CheckerCompleted(dbus.Int16(exitstatus),

1803

# This is specific to GNU libC

1804

dbus.Int64(exitstatus << 8),

1379

dbus.Int64(0),

1805

1380

dbus.String(command))

1806

1381

else:

1807

1382

# Emit D-Bus signal

1808

1383

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

1809

1384

dbus.Int64(

1810

# This is specific to GNU libC

1811

(exitstatus << 8)

1812

| self.last_checker_signal),

1385

self.last_checker_signal),

1813

1386

dbus.String(command))

1814

1387

return ret

1815

1388

1829

1402

1830

1403

def approve(self, value=True):

1831

1404

self.approved = value

1832

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

1833

* 1000), self._reset_approved)

1405

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

1406

* 1000), self._reset_approved)

1834

1407

self.send_changedstate()

1835

1408

1836

1409

## D-Bus methods, signals & properties

1892

1465

self.checked_ok()

1893

1466

1894

1467

# Enable - method

1895

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

1896

1468

@dbus.service.method(_interface)

1897

1469

def Enable(self):

1898

1470

"D-Bus method"

1899

1471

self.enable()

1900

1472

1901

1473

# StartChecker - method

1902

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

1903

1474

@dbus.service.method(_interface)

1904

1475

def StartChecker(self):

1905

1476

"D-Bus method"

1906

1477

self.start_checker()

1907

1478

1908

1479

# Disable - method

1909

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

1910

1480

@dbus.service.method(_interface)

1911

1481

def Disable(self):

1912

1482

"D-Bus method"

1913

1483

self.disable()

1914

1484

1915

1485

# StopChecker - method

1916

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

1917

1486

@dbus.service.method(_interface)

1918

1487

def StopChecker(self):

1919

1488

self.stop_checker()

1955

1524

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

1956

1525

1957

1526

# Name - property

1958

@dbus_annotations(

1959

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

1960

1527

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

1961

1528

def Name_dbus_property(self):

1962

1529

return dbus.String(self.name)

1963

1530

1964

1531

# Fingerprint - property

1965

@dbus_annotations(

1966

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

1967

1532

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

1968

1533

def Fingerprint_dbus_property(self):

1969

1534

return dbus.String(self.fingerprint)

1978

1543

self.host = str(value)

1979

1544

1980

1545

# Created - property

1981

@dbus_annotations(

1982

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

1983

1546

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

1984

1547

def Created_dbus_property(self):

1985

1548

return datetime_to_dbus(self.created)

2046

1609

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

2047

1610

is None):

2048

1611

return

2049

GLib.source_remove(self.disable_initiator_tag)

2050

self.disable_initiator_tag = GLib.timeout_add(

1612

gobject.source_remove(self.disable_initiator_tag)

1613

self.disable_initiator_tag = gobject.timeout_add(

2051

1614

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

2052

1615

self.disable)

2053

1616

2073

1636

return

2074

1637

if self.enabled:

2075

1638

# Reschedule checker run

2076

GLib.source_remove(self.checker_initiator_tag)

2077

self.checker_initiator_tag = GLib.timeout_add(

1639

gobject.source_remove(self.checker_initiator_tag)

1640

self.checker_initiator_tag = gobject.timeout_add(

2078

1641

value, self.start_checker)

2079

1642

self.start_checker() # Start one now, too

2080

1643

2100

1663

self.stop_checker()

2101

1664

2102

1665

# ObjectPath - property

2103

@dbus_annotations(

2104

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

2105

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

2106

1666

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

2107

1667

def ObjectPath_dbus_property(self):

2108

1668

return self.dbus_object_path # is already a dbus.ObjectPath

2109

1669

2110

1670

# Secret = property

2111

@dbus_annotations(

2112

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

2113

"invalidates"})

2114

1671

@dbus_service_property(_interface,

2115

1672

signature="ay",

2116

1673

access="write",

2162

1719

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

2163

1720

self.server.child_pipe.fileno())

2164

1721

2165

session = gnutls.ClientSession(self.request)

1722

session = gnutls.connection.ClientSession(

1723

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

1724

1725

# Note: gnutls.connection.X509Credentials is really a

1726

# generic GnuTLS certificate credentials object so long as

1727

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

1728

# here despite using OpenPGP certificates.

2166

1729

2167

1730

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

2168

1731

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

2172

1735

priority = self.server.gnutls_priority

2173

1736

if priority is None:

2174

1737

priority = "NORMAL"

2175

gnutls.priority_set_direct(session._c_object, priority,

2176

None)

1738

gnutls.library.functions.gnutls_priority_set_direct(

1739

session._c_object, priority, None)

2177

1740

2178

1741

# Start communication using the Mandos protocol

2179

1742

# Get protocol number

2189

1752

# Start GnuTLS connection

2190

1753

try:

2191

1754

session.handshake()

2192

except gnutls.Error as error:

1755

except gnutls.errors.GNUTLSError as error:

2193

1756

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

2194

1757

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

2195

1758

# established. Just abandon the request.

2201

1764

try:

2202

1765

fpr = self.fingerprint(

2203

1766

self.peer_certificate(session))

2204

except (TypeError, gnutls.Error) as error:

1767

except (TypeError,

1768

gnutls.errors.GNUTLSError) as error:

2205

1769

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

2206

1770

return

2207

1771

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

2265

1829

else:

2266

1830

delay -= time2 - time

2267

1831

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

1832

sent_size = 0

1833

while sent_size < len(client.secret):

1834

try:

1835

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

1836

except gnutls.errors.GNUTLSError as error:

1837

logger.warning("gnutls send failed",

1838

exc_info=error)

1839

return

1840

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

1841

len(client.secret) - (sent_size

1842

+ sent))

1843

sent_size += sent

2274

1844

2275

1845

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

2276

1846

# bump the timeout using extended_timeout

2284

1854

client.approvals_pending -= 1

2285

1855

try:

2286

1856

session.bye()

2287

except gnutls.Error as error:

1857

except gnutls.errors.GNUTLSError as error:

2288

1858

logger.warning("GnuTLS bye failed",

2289

1859

exc_info=error)

2290

1860

2292

1862

def peer_certificate(session):

2293

1863

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

2294

1864

# If not an OpenPGP certificate...

2295

if (gnutls.certificate_type_get(session._c_object)

2296

!= gnutls.CRT_OPENPGP):

2297

# ...return invalid data

2298

return b""

1865

if (gnutls.library.functions.gnutls_certificate_type_get(

1866

session._c_object)

1867

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1868

# ...do the normal thing

1869

return session.peer_certificate

2299

1870

list_size = ctypes.c_uint(1)

2300

cert_list = (gnutls.certificate_get_peers

1871

cert_list = (gnutls.library.functions

1872

.gnutls_certificate_get_peers

2301

1873

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

2302

1874

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

2303

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

1875

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

1876

" certificate")

2304

1877

if list_size.value == 0:

2305

1878

return None

2306

1879

cert = cert_list[0]

2310

1883

def fingerprint(openpgp):

2311

1884

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2312

1885

# New GnuTLS "datum" with the OpenPGP public key

2313

datum = gnutls.datum_t(

1886

datum = gnutls.library.types.gnutls_datum_t(

2314

1887

ctypes.cast(ctypes.c_char_p(openpgp),

2315

1888

ctypes.POINTER(ctypes.c_ubyte)),

2316

1889

ctypes.c_uint(len(openpgp)))

2317

1890

# New empty GnuTLS certificate

2318

crt = gnutls.openpgp_crt_t()

2319

gnutls.openpgp_crt_init(ctypes.byref(crt))

1891

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1892

gnutls.library.functions.gnutls_openpgp_crt_init(

1893

ctypes.byref(crt))

2320

1894

# Import the OpenPGP public key into the certificate

2321

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

2322

gnutls.OPENPGP_FMT_RAW)

1895

gnutls.library.functions.gnutls_openpgp_crt_import(

1896

crt, ctypes.byref(datum),

1897

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

2323

1898

# Verify the self signature in the key

2324

1899

crtverify = ctypes.c_uint()

2325

gnutls.openpgp_crt_verify_self(crt, 0,

2326

ctypes.byref(crtverify))

1900

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1901

crt, 0, ctypes.byref(crtverify))

2327

1902

if crtverify.value != 0:

2328

gnutls.openpgp_crt_deinit(crt)

2329

raise gnutls.CertificateSecurityError("Verify failed")

1903

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1904

raise gnutls.errors.CertificateSecurityError(

1905

"Verify failed")

2330

1906

# New buffer for the fingerprint

2331

1907

buf = ctypes.create_string_buffer(20)

2332

1908

buf_len = ctypes.c_size_t()

2333

1909

# Get the fingerprint from the certificate into the buffer

2334

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

2335

ctypes.byref(buf_len))

1910

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1911

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

2336

1912

# Deinit the certificate

2337

gnutls.openpgp_crt_deinit(crt)

1913

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2338

1914

# Convert the buffer to a Python bytestring

2339

1915

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

2340

1916

# Convert the bytestring to hexadecimal notation

2484

2060

gnutls_priority GnuTLS priority string

2485

2061

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

2486

2062

2487

Assumes a GLib.MainLoop event loop.

2063

Assumes a gobject.MainLoop event loop.

2488

2064

"""

2489

2065

2490

2066

def __init__(self, server_address, RequestHandlerClass,

2515

2091

2516

2092

def add_pipe(self, parent_pipe, proc):

2517

2093

# Call "handle_ipc" for both data and EOF events

2518

GLib.io_add_watch(

2094

gobject.io_add_watch(

2519

2095

parent_pipe.fileno(),

2520

GLib.IO_IN | GLib.IO_HUP,

2096

gobject.IO_IN | gobject.IO_HUP,

2521

2097

functools.partial(self.handle_ipc,

2522

2098

parent_pipe = parent_pipe,

2523

2099

proc = proc))

2527

2103

proc = None,

2528

2104

client_object=None):

2529

2105

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

2530

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

2106

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

2531

2107

# Wait for other process to exit

2532

2108

proc.join()

2533

2109

return False

2540

2116

fpr = request[1]

2541

2117

address = request[2]

2542

2118

2543

for c in self.clients.values():

2119

for c in self.clients.itervalues():

2544

2120

if c.fingerprint == fpr:

2545

2121

client = c

2546

2122

break

2554

2130

parent_pipe.send(False)

2555

2131

return False

2556

2132

2557

GLib.io_add_watch(

2133

gobject.io_add_watch(

2558

2134

parent_pipe.fileno(),

2559

GLib.IO_IN | GLib.IO_HUP,

2135

gobject.IO_IN | gobject.IO_HUP,

2560

2136

functools.partial(self.handle_ipc,

2561

2137

parent_pipe = parent_pipe,

2562

2138

proc = proc,

2944

2520

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

2945

2521

exc_info=e)

2946

2522

2947

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

2948

("mandos", "mandos"),

2949

("nobody", "nogroup")):

2523

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

2950

2524

try:

2951

2525

uid = pwd.getpwnam(name).pw_uid

2952

gid = pwd.getpwnam(group).pw_gid

2526

gid = pwd.getpwnam(name).pw_gid

2953

2527

break

2954

2528

except KeyError:

2955

2529

continue

2959

2533

try:

2960

2534

os.setgid(gid)

2961

2535

os.setuid(uid)

2962

if debug:

2963

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

2964

gid))

2965

2536

except OSError as error:

2966

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

2967

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

2968

2537

if error.errno != errno.EPERM:

2969

2538

raise

2970

2539

2973

2542

2974

2543

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

2975

2544

# - GnuTLS manual

2976

gnutls.global_set_log_level(11)

2545

gnutls.library.functions.gnutls_global_set_log_level(11)

2977

2546

2978

@gnutls.log_func

2547

@gnutls.library.types.gnutls_log_func

2979

2548

def debug_gnutls(level, string):

2980

2549

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

2981

2550

2982

gnutls.global_set_log_function(debug_gnutls)

2551

gnutls.library.functions.gnutls_global_set_log_function(

2552

debug_gnutls)

2983

2553

2984

2554

# Redirect stdin so all checkers get /dev/null

2985

2555

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

2992

2562

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

2993

2563

daemon()

2994

2564

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()

2565

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

2566

# need to inform gobject that threads will be used.

2567

gobject.threads_init()

2998

2568

2999

2569

global main_loop

3000

2570

# From the Avahi example code

3001

2571

DBusGMainLoop(set_as_default=True)

3002

main_loop = GLib.MainLoop()

2572

main_loop = gobject.MainLoop()

3003

2573

bus = dbus.SystemBus()

3004

2574

# End of Avahi example code

3005

2575

if use_dbus:

3049

2619

if server_settings["restore"]:

3050

2620

try:

3051

2621

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

2622

clients_data, old_client_settings = pickle.load(

2623

stored_state)

3097

2624

os.remove(stored_state_path)

3098

2625

except IOError as e:

3099

2626

if e.errno == errno.ENOENT:

3200

2727

del pidfile

3201

2728

del pidfilename

3202

2729

3203

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

3204

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3205

lambda: main_loop.quit() and False)

2730

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

2731

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

3206

2732

3207

2733

if use_dbus:

3208

2734

3209

2735

@alternate_dbus_interfaces(

3210

2736

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

3211

class MandosDBusService(DBusObjectWithObjectManager):

2737

class MandosDBusService(DBusObjectWithProperties):

3212

2738

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

3213

2739

3214

2740

def __init__(self):

3216

2742

3217

2743

_interface = "se.recompile.Mandos"

3218

2744

2745

@dbus_interface_annotations(_interface)

2746

def _foo(self):

2747

return {

2748

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

2749

"false" }

2750

3219

2751

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

3220

2752

def ClientAdded(self, objpath):

3221

2753

"D-Bus signal"

3226

2758

"D-Bus signal"

3227

2759

pass

3228

2760

3229

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

3230

"true"})

3231

2761

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

3232

2762

def ClientRemoved(self, objpath, name):

3233

2763

"D-Bus signal"

3234

2764

pass

3235

2765

3236

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

3237

"true"})

3238

2766

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

3239

2767

def GetAllClients(self):

3240

2768

"D-Bus method"

3241

2769

return dbus.Array(c.dbus_object_path for c in

3242

tcp_server.clients.values())

2770

tcp_server.clients.itervalues())

3243

2771

3244

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

3245

"true"})

3246

2772

@dbus.service.method(_interface,

3247

2773

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

3248

2774

def GetAllClientsWithProperties(self):

3249

2775

"D-Bus method"

3250

2776

return dbus.Dictionary(

3251

{ c.dbus_object_path: c.GetAll(

3252

"se.recompile.Mandos.Client")

3253

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

2777

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

2778

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

3254

2779

signature="oa{sv}")

3255

2780

3256

2781

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

3257

2782

def RemoveClient(self, object_path):

3258

2783

"D-Bus method"

3259

for c in tcp_server.clients.values():

2784

for c in tcp_server.clients.itervalues():

3260

2785

if c.dbus_object_path == object_path:

3261

2786

del tcp_server.clients[c.name]

3262

2787

c.remove_from_connection()

3263

# Don't signal the disabling

2788

# Don't signal anything except ClientRemoved

3264

2789

c.disable(quiet=True)

3265

# Emit D-Bus signal for removal

3266

self.client_removed_signal(c)

2790

# Emit D-Bus signal

2791

self.ClientRemoved(object_path, c.name)

3267

2792

return

3268

2793

raise KeyError(object_path)

3269

2794

3270

2795

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)

3307

2796

3308

2797

mandos_dbus_service = MandosDBusService()

3309

2798

3322

2811

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

3323

2812

clients = {}

3324

2813

with PGPEngine() as pgp:

3325

for client in tcp_server.clients.values():

2814

for client in tcp_server.clients.itervalues():

3326

2815

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

3327

2816

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

3328

2817

key)

3352

2841

prefix='clients-',

3353

2842

dir=os.path.dirname(stored_state_path),

3354

2843

delete=False) as stored_state:

3355

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

3356

protocol = 2)

2844

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

3357

2845

tempname = stored_state.name

3358

2846

os.rename(tempname, stored_state_path)

3359

2847

except (IOError, OSError) as e:

3375

2863

name, client = tcp_server.clients.popitem()

3376

2864

if use_dbus:

3377

2865

client.remove_from_connection()

3378

# Don't signal the disabling

2866

# Don't signal anything except ClientRemoved

3379

2867

client.disable(quiet=True)

3380

# Emit D-Bus signal for removal

3381

2868

if use_dbus:

3382

mandos_dbus_service.client_removed_signal(client)

2869

# Emit D-Bus signal

2870

mandos_dbus_service.ClientRemoved(

2871

client.dbus_object_path, client.name)

3383

2872

client_settings.clear()

3384

2873

3385

2874

atexit.register(cleanup)

3386

2875

3387

for client in tcp_server.clients.values():

2876

for client in tcp_server.clients.itervalues():

3388

2877

if use_dbus:

3389

# Emit D-Bus signal for adding

3390

mandos_dbus_service.client_added_signal(client)

2878

# Emit D-Bus signal

2879

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3391

2880

# Need to initiate checking of clients

3392

2881

if client.enabled:

3393

2882

client.init_checker()

3419

2908

sys.exit(1)

3420

2909

# End of Avahi example code

3421

2910

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))

2911

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

2912

lambda *args, **kwargs:

2913

(tcp_server.handle_request

2914

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

3426

2915

3427

2916

logger.debug("Starting main loop")

3428

2917

main_loop.run()