/mandos/trunk : revision 766

44

import argparse

45

import datetime

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

47

53

try:

48

54

import ConfigParser as configparser

49

55

except ImportError:

98

104

if sys.version_info.major == 2:

99

105

str = unicode

100

106

101

version = "1.7.1"

107

version = "1.6.9"

102

108

stored_state_file = "clients.pickle"

103

109

104

110

logger = logging.getLogger()

389

395

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

390

396

self.cleanup()

391

397

elif state == avahi.SERVER_RUNNING:

392

try:

393

self.add()

394

except dbus.exceptions.DBusException as error:

395

if (error.get_dbus_name()

396

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

397

logger.info("Local Zeroconf service name"

398

" collision.")

399

return self.rename(remove=False)

400

else:

401

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

402

self.cleanup()

403

os._exit(1)

398

self.add()

404

399

else:

405

400

if error is None:

406

401

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

429

424

.format(self.name)))

430

425

return ret

431

426

432

# Pretend that we have a GnuTLS module

433

class GnuTLS(object):

434

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

435

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

436

437

_library = ctypes.cdll.LoadLibrary(

438

ctypes.util.find_library("gnutls"))

439

_need_version = "3.3.0"

440

def __init__(self):

441

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

442

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

443

# happens.

444

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

445

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

446

.format(self._need_version))

447

448

# Unless otherwise indicated, the constants and types below are

449

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

450

451

# Constants

452

E_SUCCESS = 0

453

CRT_OPENPGP = 2

454

CLIENT = 2

455

SHUT_RDWR = 0

456

CRD_CERTIFICATE = 1

457

E_NO_CERTIFICATE_FOUND = -49

458

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

459

460

# Types

461

class session_int(ctypes.Structure):

462

_fields_ = []

463

session_t = ctypes.POINTER(session_int)

464

class certificate_credentials_st(ctypes.Structure):

465

_fields_ = []

466

certificate_credentials_t = ctypes.POINTER(

467

certificate_credentials_st)

468

certificate_type_t = ctypes.c_int

469

class datum_t(ctypes.Structure):

470

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

471

('size', ctypes.c_uint)]

472

class openpgp_crt_int(ctypes.Structure):

473

_fields_ = []

474

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

475

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

476

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

477

credentials_type_t = ctypes.c_int #

478

transport_ptr_t = ctypes.c_void_p

479

close_request_t = ctypes.c_int

480

481

# Exceptions

482

class Error(Exception):

483

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

484

# exception might be raised from within GnuTLS.__init__,

485

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

486

# global variable happens.

487

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

488

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

489

# code is passed, convert it to a string with

490

# gnutls.strerror()

491

if message is None and code is not None:

492

message = GnuTLS.strerror(code)

493

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

494

message, *args)

495

496

class CertificateSecurityError(Error):

497

pass

498

499

# Classes

500

class Credentials(object):

501

def __init__(self):

502

self._c_object = gnutls.certificate_credentials_t()

503

gnutls.certificate_allocate_credentials(

504

ctypes.byref(self._c_object))

505

self.type = gnutls.CRD_CERTIFICATE

506

507

def __del__(self):

508

gnutls.certificate_free_credentials(self._c_object)

509

510

class ClientSession(object):

511

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

512

self._c_object = gnutls.session_t()

513

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

514

gnutls.set_default_priority(self._c_object)

515

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

516

gnutls.handshake_set_private_extensions(self._c_object,

517

True)

518

self.socket = socket

519

if credentials is None:

520

credentials = gnutls.Credentials()

521

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

522

ctypes.cast(credentials._c_object,

523

ctypes.c_void_p))

524

self.credentials = credentials

525

526

def __del__(self):

527

gnutls.deinit(self._c_object)

528

529

def handshake(self):

530

return gnutls.handshake(self._c_object)

531

532

def send(self, data):

533

data = bytes(data)

534

if not data:

535

return 0

536

return gnutls.record_send(self._c_object, data, len(data))

537

538

def bye(self):

539

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

540

541

# Error handling function

542

def _error_code(result):

543

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

544

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

545

if result >= 0:

546

return result

547

if result == gnutls.E_NO_CERTIFICATE_FOUND:

548

raise gnutls.CertificateSecurityError(code = result)

549

raise gnutls.Error(code = result)

550

551

# Unless otherwise indicated, the function declarations below are

552

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

553

554

# Functions

555

priority_set_direct = _library.gnutls_priority_set_direct

556

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

557

ctypes.POINTER(ctypes.c_char_p)]

558

priority_set_direct.restype = _error_code

559

560

init = _library.gnutls_init

561

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

562

init.restype = _error_code

563

564

set_default_priority = _library.gnutls_set_default_priority

565

set_default_priority.argtypes = [session_t]

566

set_default_priority.restype = _error_code

567

568

record_send = _library.gnutls_record_send

569

record_send.argtypes = [session_t, ctypes.c_void_p,

570

ctypes.c_size_t]

571

record_send.restype = ctypes.c_ssize_t

572

573

certificate_allocate_credentials = (

574

_library.gnutls_certificate_allocate_credentials)

575

certificate_allocate_credentials.argtypes = [

576

ctypes.POINTER(certificate_credentials_t)]

577

certificate_allocate_credentials.restype = _error_code

578

579

certificate_free_credentials = (

580

_library.gnutls_certificate_free_credentials)

581

certificate_free_credentials.argtypes = [certificate_credentials_t]

582

certificate_free_credentials.restype = None

583

584

handshake_set_private_extensions = (

585

_library.gnutls_handshake_set_private_extensions)

586

handshake_set_private_extensions.argtypes = [session_t,

587

ctypes.c_int]

588

handshake_set_private_extensions.restype = None

589

590

credentials_set = _library.gnutls_credentials_set

591

credentials_set.argtypes = [session_t, credentials_type_t,

592

ctypes.c_void_p]

593

credentials_set.restype = _error_code

594

595

strerror = _library.gnutls_strerror

596

strerror.argtypes = [ctypes.c_int]

597

strerror.restype = ctypes.c_char_p

598

599

certificate_type_get = _library.gnutls_certificate_type_get

600

certificate_type_get.argtypes = [session_t]

601

certificate_type_get.restype = _error_code

602

603

certificate_get_peers = _library.gnutls_certificate_get_peers

604

certificate_get_peers.argtypes = [session_t,

605

ctypes.POINTER(ctypes.c_uint)]

606

certificate_get_peers.restype = ctypes.POINTER(datum_t)

607

608

global_set_log_level = _library.gnutls_global_set_log_level

609

global_set_log_level.argtypes = [ctypes.c_int]

610

global_set_log_level.restype = None

611

612

global_set_log_function = _library.gnutls_global_set_log_function

613

global_set_log_function.argtypes = [log_func]

614

global_set_log_function.restype = None

615

616

deinit = _library.gnutls_deinit

617

deinit.argtypes = [session_t]

618

deinit.restype = None

619

620

handshake = _library.gnutls_handshake

621

handshake.argtypes = [session_t]

622

handshake.restype = _error_code

623

624

transport_set_ptr = _library.gnutls_transport_set_ptr

625

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

626

transport_set_ptr.restype = None

627

628

bye = _library.gnutls_bye

629

bye.argtypes = [session_t, close_request_t]

630

bye.restype = _error_code

631

632

check_version = _library.gnutls_check_version

633

check_version.argtypes = [ctypes.c_char_p]

634

check_version.restype = ctypes.c_char_p

635

636

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

637

638

openpgp_crt_init = _library.gnutls_openpgp_crt_init

639

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

640

openpgp_crt_init.restype = _error_code

641

642

openpgp_crt_import = _library.gnutls_openpgp_crt_import

643

openpgp_crt_import.argtypes = [openpgp_crt_t,

644

ctypes.POINTER(datum_t),

645

openpgp_crt_fmt_t]

646

openpgp_crt_import.restype = _error_code

647

648

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

649

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

650

ctypes.POINTER(ctypes.c_uint)]

651

openpgp_crt_verify_self.restype = _error_code

652

653

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

654

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

655

openpgp_crt_deinit.restype = None

656

657

openpgp_crt_get_fingerprint = (

658

_library.gnutls_openpgp_crt_get_fingerprint)

659

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

660

ctypes.c_void_p,

661

ctypes.POINTER(

662

ctypes.c_size_t)]

663

openpgp_crt_get_fingerprint.restype = _error_code

664

665

# Remove non-public function

666

del _error_code

667

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

668

gnutls = GnuTLS()

669

670

427

def call_pipe(connection, # : multiprocessing.Connection

671

428

func, *args, **kwargs):

672

429

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

1074

831

access="r")

1075

832

def Property_dbus_property(self):

1076

833

return dbus.Boolean(False)

1077

1078

See also the DBusObjectWithAnnotations class.

1079

834

"""

1080

835

1081

836

def decorator(func):

1103

858

pass

1104

859

1105

860

1106

class DBusObjectWithAnnotations(dbus.service.Object):

1107

"""A D-Bus object with annotations.

861

class DBusObjectWithProperties(dbus.service.Object):

862

"""A D-Bus object with properties.

1108

863

1109

Classes inheriting from this can use the dbus_annotations

1110

decorator to add annotations to methods or signals.

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.

1111

867

"""

1112

868

1113

869

@staticmethod

1129

885

for name, athing in

1130

886

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

1131

887

1132

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1133

out_signature = "s",

1134

path_keyword = 'object_path',

1135

connection_keyword = 'connection')

1136

def Introspect(self, object_path, connection):

1137

"""Overloading of standard D-Bus method.

1138

1139

Inserts annotation tags on methods and signals.

1140

"""

1141

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

1142

connection)

1143

try:

1144

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

1145

1146

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

1147

# Add annotation tags

1148

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

1149

for tag in if_tag.getElementsByTagName(typ):

1150

annots = dict()

1151

for name, prop in (self.

1152

_get_all_dbus_things(typ)):

1153

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

1154

and prop._dbus_interface

1155

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

1156

annots.update(getattr(

1157

prop, "_dbus_annotations", {}))

1158

for name, value in annots.items():

1159

ann_tag = document.createElement(

1160

"annotation")

1161

ann_tag.setAttribute("name", name)

1162

ann_tag.setAttribute("value", value)

1163

tag.appendChild(ann_tag)

1164

# Add interface annotation tags

1165

for annotation, value in dict(

1166

itertools.chain.from_iterable(

1167

annotations().items()

1168

for name, annotations

1169

in self._get_all_dbus_things("interface")

1170

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

1171

)).items():

1172

ann_tag = document.createElement("annotation")

1173

ann_tag.setAttribute("name", annotation)

1174

ann_tag.setAttribute("value", value)

1175

if_tag.appendChild(ann_tag)

1176

# Fix argument name for the Introspect method itself

1177

if (if_tag.getAttribute("name")

1178

== dbus.INTROSPECTABLE_IFACE):

1179

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

1180

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

1181

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

1182

if (arg.getAttribute("direction")

1183

== "out"):

1184

arg.setAttribute("name",

1185

"xml_data")

1186

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

1187

document.unlink()

1188

except (AttributeError, xml.dom.DOMException,

1189

xml.parsers.expat.ExpatError) as error:

1190

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

1191

exc_info=error)

1192

return xmlstring

1193

1194

1195

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1196

"""A D-Bus object with properties.

1197

1198

Classes inheriting from this can use the dbus_service_property

1199

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

1200

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

1201

"""

1202

1203

888

def _get_dbus_property(self, interface_name, property_name):

1204

889

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

1205

890

property with the specified name and interface.

1215

900

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

1216

901

self.dbus_object_path, interface_name, property_name))

1217

902

1218

@classmethod

1219

def _get_all_interface_names(cls):

1220

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

1221

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

1222

"_dbus_interface", None)

1223

for x in (inspect.getmro(cls))

1224

for attr in dir(x))

1225

if name is not None)

1226

1227

903

@dbus.service.method(dbus.PROPERTIES_IFACE,

1228

904

in_signature="ss",

1229

905

out_signature="v")

1299

975

1300

976

Inserts property tags and interface annotation tags.

1301

977

"""

1302

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1303

object_path,

1304

connection)

978

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

979

connection)

1305

980

try:

1306

981

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

1307

982

1320

995

if prop._dbus_interface

1321

996

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

1322

997

if_tag.appendChild(tag)

1323

# Add annotation tags for properties

1324

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

1325

annots = dict()

1326

for name, prop in self._get_all_dbus_things(

1327

"property"):

1328

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

1329

and prop._dbus_interface

1330

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

1331

annots.update(getattr(

1332

prop, "_dbus_annotations", {}))

1333

for name, value in annots.items():

1334

ann_tag = document.createElement(

1335

"annotation")

1336

ann_tag.setAttribute("name", name)

1337

ann_tag.setAttribute("value", value)

1338

tag.appendChild(ann_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)

1339

1027

# Add the names to the return values for the

1340

1028

# "org.freedesktop.DBus.Properties" methods

1341

1029

if (if_tag.getAttribute("name")

1359

1047

exc_info=error)

1360

1048

return xmlstring

1361

1049

1362

try:

1363

dbus.OBJECT_MANAGER_IFACE

1364

except AttributeError:

1365

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

1366

1367

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1368

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

1369

1370

Classes inheriting from this exposes the standard

1371

GetManagedObjects call and the InterfacesAdded and

1372

InterfacesRemoved signals on the standard

1373

"org.freedesktop.DBus.ObjectManager" interface.

1374

1375

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

1376

manually.

1377

"""

1378

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1379

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

1380

def GetManagedObjects(self):

1381

"""This function must be overridden"""

1382

raise NotImplementedError()

1383

1384

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1385

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

1386

def InterfacesAdded(self, object_path, interfaces_and_properties):

1387

pass

1388

1389

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

1390

def InterfacesRemoved(self, object_path, interfaces):

1391

pass

1392

1393

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1394

out_signature = "s",

1395

path_keyword = 'object_path',

1396

connection_keyword = 'connection')

1397

def Introspect(self, object_path, connection):

1398

"""Overloading of standard D-Bus method.

1399

1400

Override return argument name of GetManagedObjects to be

1401

"objpath_interfaces_and_properties"

1402

"""

1403

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1404

object_path,

1405

connection)

1406

try:

1407

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

1408

1409

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

1410

# Fix argument name for the GetManagedObjects method

1411

if (if_tag.getAttribute("name")

1412

== dbus.OBJECT_MANAGER_IFACE):

1413

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

1414

if (cn.getAttribute("name")

1415

== "GetManagedObjects"):

1416

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

1417

if (arg.getAttribute("direction")

1418

== "out"):

1419

arg.setAttribute(

1420

"name",

1421

"objpath_interfaces"

1422

"_and_properties")

1423

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

1424

document.unlink()

1425

except (AttributeError, xml.dom.DOMException,

1426

xml.parsers.expat.ExpatError) as error:

1427

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

1428

exc_info = error)

1429

return xmlstring

1430

1050

1431

1051

def datetime_to_dbus(dt, variant_level=0):

1432

1052

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

1523

1143

func1 and func2 to the "call_both" function

1524

1144

outside of its arguments"""

1525

1145

1526

@functools.wraps(func2)

1527

1146

def call_both(*args, **kwargs):

1528

1147

"""This function will emit two D-Bus

1529

1148

signals by calling func1 and func2"""

1530

1149

func1(*args, **kwargs)

1531

1150

func2(*args, **kwargs)

1532

# Make wrapper function look like a D-Bus signal

1533

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

1534

if name.startswith("_dbus_"):

1535

setattr(call_both, name, attr)

1536

1151

1537

1152

return call_both

1538

1153

# Create the "call_both" function and add it to

1750

1365

if exitstatus >= 0:

1751

1366

# Emit D-Bus signal

1752

1367

self.CheckerCompleted(dbus.Int16(exitstatus),

1753

# This is specific to GNU libC

1754

dbus.Int64(exitstatus << 8),

1368

dbus.Int64(0),

1755

1369

dbus.String(command))

1756

1370

else:

1757

1371

# Emit D-Bus signal

1758

1372

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

1759

1373

dbus.Int64(

1760

# This is specific to GNU libC

1761

(exitstatus << 8)

1762

| self.last_checker_signal),

1374

self.last_checker_signal),

1763

1375

dbus.String(command))

1764

1376

return ret

1765

1377

1842

1454

self.checked_ok()

1843

1455

1844

1456

# Enable - method

1845

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

1846

1457

@dbus.service.method(_interface)

1847

1458

def Enable(self):

1848

1459

"D-Bus method"

1849

1460

self.enable()

1850

1461

1851

1462

# StartChecker - method

1852

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

1853

1463

@dbus.service.method(_interface)

1854

1464

def StartChecker(self):

1855

1465

"D-Bus method"

1856

1466

self.start_checker()

1857

1467

1858

1468

# Disable - method

1859

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

1860

1469

@dbus.service.method(_interface)

1861

1470

def Disable(self):

1862

1471

"D-Bus method"

1863

1472

self.disable()

1864

1473

1865

1474

# StopChecker - method

1866

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

1867

1475

@dbus.service.method(_interface)

1868

1476

def StopChecker(self):

1869

1477

self.stop_checker()

1905

1513

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

1906

1514

1907

1515

# Name - property

1908

@dbus_annotations(

1909

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

1910

1516

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

1911

1517

def Name_dbus_property(self):

1912

1518

return dbus.String(self.name)

1913

1519

1914

1520

# Fingerprint - property

1915

@dbus_annotations(

1916

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

1917

1521

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

1918

1522

def Fingerprint_dbus_property(self):

1919

1523

return dbus.String(self.fingerprint)

1928

1532

self.host = str(value)

1929

1533

1930

1534

# Created - property

1931

@dbus_annotations(

1932

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

1933

1535

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

1934

1536

def Created_dbus_property(self):

1935

1537

return datetime_to_dbus(self.created)

2050

1652

self.stop_checker()

2051

1653

2052

1654

# ObjectPath - property

2053

@dbus_annotations(

2054

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

2055

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

2056

1655

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

2057

1656

def ObjectPath_dbus_property(self):

2058

1657

return self.dbus_object_path # is already a dbus.ObjectPath

2059

1658

2060

1659

# Secret = property

2061

@dbus_annotations(

2062

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

2063

"invalidates"})

2064

1660

@dbus_service_property(_interface,

2065

1661

signature="ay",

2066

1662

access="write",

2112

1708

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

2113

1709

self.server.child_pipe.fileno())

2114

1710

2115

session = gnutls.ClientSession(self.request)

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.

2116

1718

2117

1719

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

2118

1720

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

2122

1724

priority = self.server.gnutls_priority

2123

1725

if priority is None:

2124

1726

priority = "NORMAL"

2125

gnutls.priority_set_direct(session._c_object, priority,

2126

None)

1727

gnutls.library.functions.gnutls_priority_set_direct(

1728

session._c_object, priority, None)

2127

1729

2128

1730

# Start communication using the Mandos protocol

2129

1731

# Get protocol number

2139

1741

# Start GnuTLS connection

2140

1742

try:

2141

1743

session.handshake()

2142

except gnutls.Error as error:

1744

except gnutls.errors.GNUTLSError as error:

2143

1745

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

2144

1746

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

2145

1747

# established. Just abandon the request.

2151

1753

try:

2152

1754

fpr = self.fingerprint(

2153

1755

self.peer_certificate(session))

2154

except (TypeError, gnutls.Error) as error:

1756

except (TypeError,

1757

gnutls.errors.GNUTLSError) as error:

2155

1758

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

2156

1759

return

2157

1760

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

2219

1822

while sent_size < len(client.secret):

2220

1823

try:

2221

1824

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

2222

except gnutls.Error as error:

1825

except gnutls.errors.GNUTLSError as error:

2223

1826

logger.warning("gnutls send failed",

2224

1827

exc_info=error)

2225

1828

return

2240

1843

client.approvals_pending -= 1

2241

1844

try:

2242

1845

session.bye()

2243

except gnutls.Error as error:

1846

except gnutls.errors.GNUTLSError as error:

2244

1847

logger.warning("GnuTLS bye failed",

2245

1848

exc_info=error)

2246

1849

2248

1851

def peer_certificate(session):

2249

1852

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

2250

1853

# If not an OpenPGP certificate...

2251

if (gnutls.certificate_type_get(session._c_object)

2252

!= gnutls.CRT_OPENPGP):

2253

# ...return invalid data

2254

return b""

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

2255

1859

list_size = ctypes.c_uint(1)

2256

cert_list = (gnutls.certificate_get_peers

1860

cert_list = (gnutls.library.functions

1861

.gnutls_certificate_get_peers

2257

1862

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

2258

1863

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

2259

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

1864

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

1865

" certificate")

2260

1866

if list_size.value == 0:

2261

1867

return None

2262

1868

cert = cert_list[0]

2266

1872

def fingerprint(openpgp):

2267

1873

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2268

1874

# New GnuTLS "datum" with the OpenPGP public key

2269

datum = gnutls.datum_t(

1875

datum = gnutls.library.types.gnutls_datum_t(

2270

1876

ctypes.cast(ctypes.c_char_p(openpgp),

2271

1877

ctypes.POINTER(ctypes.c_ubyte)),

2272

1878

ctypes.c_uint(len(openpgp)))

2273

1879

# New empty GnuTLS certificate

2274

crt = gnutls.openpgp_crt_t()

2275

gnutls.openpgp_crt_init(ctypes.byref(crt))

1880

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1881

gnutls.library.functions.gnutls_openpgp_crt_init(

1882

ctypes.byref(crt))

2276

1883

# Import the OpenPGP public key into the certificate

2277

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

2278

gnutls.OPENPGP_FMT_RAW)

1884

gnutls.library.functions.gnutls_openpgp_crt_import(

1885

crt, ctypes.byref(datum),

1886

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

2279

1887

# Verify the self signature in the key

2280

1888

crtverify = ctypes.c_uint()

2281

gnutls.openpgp_crt_verify_self(crt, 0,

2282

ctypes.byref(crtverify))

1889

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1890

crt, 0, ctypes.byref(crtverify))

2283

1891

if crtverify.value != 0:

2284

gnutls.openpgp_crt_deinit(crt)

2285

raise gnutls.CertificateSecurityError("Verify failed")

1892

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1893

raise gnutls.errors.CertificateSecurityError(

1894

"Verify failed")

2286

1895

# New buffer for the fingerprint

2287

1896

buf = ctypes.create_string_buffer(20)

2288

1897

buf_len = ctypes.c_size_t()

2289

1898

# Get the fingerprint from the certificate into the buffer

2290

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

2291

ctypes.byref(buf_len))

1899

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1900

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

2292

1901

# Deinit the certificate

2293

gnutls.openpgp_crt_deinit(crt)

1902

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2294

1903

# Convert the buffer to a Python bytestring

2295

1904

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

2296

1905

# Convert the bytestring to hexadecimal notation

2777

2386

"debug": "False",

2778

2387

"priority":

2779

2388

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

2780

":+SIGN-DSA-SHA256",

2389

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

2781

2390

"servicename": "Mandos",

2782

2391

"use_dbus": "True",

2783

2392

"use_ipv6": "True",

2922

2531

2923

2532

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

2924

2533

# - GnuTLS manual

2925

gnutls.global_set_log_level(11)

2534

gnutls.library.functions.gnutls_global_set_log_level(11)

2926

2535

2927

@gnutls.log_func

2536

@gnutls.library.types.gnutls_log_func

2928

2537

def debug_gnutls(level, string):

2929

2538

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

2930

2539

2931

gnutls.global_set_log_function(debug_gnutls)

2540

gnutls.library.functions.gnutls_global_set_log_function(

2541

debug_gnutls)

2932

2542

2933

2543

# Redirect stdin so all checkers get /dev/null

2934

2544

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

3113

2723

3114

2724

@alternate_dbus_interfaces(

3115

2725

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

3116

class MandosDBusService(DBusObjectWithObjectManager):

2726

class MandosDBusService(DBusObjectWithProperties):

3117

2727

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

3118

2728

3119

2729

def __init__(self):

3121

2731

3122

2732

_interface = "se.recompile.Mandos"

3123

2733

2734

@dbus_interface_annotations(_interface)

2735

def _foo(self):

2736

return {

2737

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

2738

"false" }

2739

3124

2740

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

3125

2741

def ClientAdded(self, objpath):

3126

2742

"D-Bus signal"

3131

2747

"D-Bus signal"

3132

2748

pass

3133

2749

3134

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

3135

"true"})

3136

2750

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

3137

2751

def ClientRemoved(self, objpath, name):

3138

2752

"D-Bus signal"

3139

2753

pass

3140

2754

3141

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

3142

"true"})

3143

2755

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

3144

2756

def GetAllClients(self):

3145

2757

"D-Bus method"

3146

2758

return dbus.Array(c.dbus_object_path for c in

3147

2759

tcp_server.clients.itervalues())

3148

2760

3149

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

3150

"true"})

3151

2761

@dbus.service.method(_interface,

3152

2762

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

3153

2763

def GetAllClientsWithProperties(self):

3154

2764

"D-Bus method"

3155

2765

return dbus.Dictionary(

3156

{ c.dbus_object_path: c.GetAll(

3157

"se.recompile.Mandos.Client")

2766

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

3158

2767

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

3159

2768

signature="oa{sv}")

3160

2769

3165

2774

if c.dbus_object_path == object_path:

3166

2775

del tcp_server.clients[c.name]

3167

2776

c.remove_from_connection()

3168

# Don't signal the disabling

2777

# Don't signal anything except ClientRemoved

3169

2778

c.disable(quiet=True)

3170

# Emit D-Bus signal for removal

3171

self.client_removed_signal(c)

2779

# Emit D-Bus signal

2780

self.ClientRemoved(object_path, c.name)

3172

2781

return

3173

2782

raise KeyError(object_path)

3174

2783

3175

2784

del _interface

3176

3177

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3178

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

3179

def GetManagedObjects(self):

3180

"""D-Bus method"""

3181

return dbus.Dictionary(

3182

{ client.dbus_object_path:

3183

dbus.Dictionary(

3184

{ interface: client.GetAll(interface)

3185

for interface in

3186

client._get_all_interface_names()})

3187

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

3188

3189

def client_added_signal(self, client):

3190

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

3191

if use_dbus:

3192

# New standard signal

3193

self.InterfacesAdded(

3194

client.dbus_object_path,

3195

dbus.Dictionary(

3196

{ interface: client.GetAll(interface)

3197

for interface in

3198

client._get_all_interface_names()}))

3199

# Old signal

3200

self.ClientAdded(client.dbus_object_path)

3201

3202

def client_removed_signal(self, client):

3203

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

3204

if use_dbus:

3205

# New standard signal

3206

self.InterfacesRemoved(

3207

client.dbus_object_path,

3208

client._get_all_interface_names())

3209

# Old signal

3210

self.ClientRemoved(client.dbus_object_path,

3211

client.name)

3212

2785

3213

2786

mandos_dbus_service = MandosDBusService()

3214

2787

3279

2852

name, client = tcp_server.clients.popitem()

3280

2853

if use_dbus:

3281

2854

client.remove_from_connection()

3282

# Don't signal the disabling

2855

# Don't signal anything except ClientRemoved

3283

2856

client.disable(quiet=True)

3284

# Emit D-Bus signal for removal

3285

2857

if use_dbus:

3286

mandos_dbus_service.client_removed_signal(client)

2858

# Emit D-Bus signal

2859

mandos_dbus_service.ClientRemoved(

2860

client.dbus_object_path, client.name)

3287

2861

client_settings.clear()

3288

2862

3289

2863

atexit.register(cleanup)

3290

2864

3291

2865

for client in tcp_server.clients.itervalues():

3292

2866

if use_dbus:

3293

# Emit D-Bus signal for adding

3294

mandos_dbus_service.client_added_signal(client)

2867

# Emit D-Bus signal

2868

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3295

2869

# Need to initiate checking of clients

3296

2870

if client.enabled:

3297

2871

client.init_checker()