/mandos/release : revision 237.7.349

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

53

47

try:

54

48

import ConfigParser as configparser

55

49

except ImportError:

104

98

if sys.version_info.major == 2:

105

99

str = unicode

106

100

107

version = "1.6.9"

101

version = "1.7.1"

108

102

stored_state_file = "clients.pickle"

109

103

110

104

logger = logging.getLogger()

395

389

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

396

390

self.cleanup()

397

391

elif state == avahi.SERVER_RUNNING:

398

self.add()

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)

399

404

else:

400

405

if error is None:

401

406

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

424

429

.format(self.name)))

425

430

return ret

426

431

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

def call_pipe(connection, # : multiprocessing.Connection

671

func, *args, **kwargs):

672

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

673

674

This function runs func(*args, **kwargs), and writes the resulting

675

return value on the provided multiprocessing.Connection.

676

"""

677

connection.send(func(*args, **kwargs))

678

connection.close()

427

679

428

680

class Client(object):

429

681

"""A representation of a client host served by this server.

456

708

last_checker_status: integer between 0 and 255 reflecting exit

457

709

status of last checker. -1 reflects crashed

458

710

checker, -2 means no checker completed yet.

711

last_checker_signal: The signal which killed the last checker, if

712

last_checker_status is -1

459

713

last_enabled: datetime.datetime(); (UTC) or None

460

714

name: string; from the config file, used in log messages and

461

715

D-Bus identifiers

635

889

# Also start a new checker *right now*.

636

890

self.start_checker()

637

891

638

def checker_callback(self, pid, condition, command):

892

def checker_callback(self, source, condition, connection,

893

command):

639

894

"""The checker has completed, so take appropriate actions."""

640

895

self.checker_callback_tag = None

641

896

self.checker = None

642

if os.WIFEXITED(condition):

643

self.last_checker_status = os.WEXITSTATUS(condition)

897

# Read return code from connection (see call_pipe)

898

returncode = connection.recv()

899

connection.close()

900

901

if returncode >= 0:

902

self.last_checker_status = returncode

903

self.last_checker_signal = None

644

904

if self.last_checker_status == 0:

645

905

logger.info("Checker for %(name)s succeeded",

646

906

vars(self))

649

909

logger.info("Checker for %(name)s failed", vars(self))

650

910

else:

651

911

self.last_checker_status = -1

912

self.last_checker_signal = -returncode

652

913

logger.warning("Checker for %(name)s crashed?",

653

914

vars(self))

915

return False

654

916

655

917

def checked_ok(self):

656

918

"""Assert that the client has been seen, alive and well."""

657

919

self.last_checked_ok = datetime.datetime.utcnow()

658

920

self.last_checker_status = 0

921

self.last_checker_signal = None

659

922

self.bump_timeout()

660

923

661

924

def bump_timeout(self, timeout=None):

687

950

# than 'timeout' for the client to be disabled, which is as it

688

951

# should be.

689

952

690

# If a checker exists, make sure it is not a zombie

691

try:

692

pid, status = os.waitpid(self.checker.pid, os.WNOHANG)

693

except AttributeError:

694

pass

695

except OSError as error:

696

if error.errno != errno.ECHILD:

697

raise

698

else:

699

if pid:

700

logger.warning("Checker was a zombie")

701

gobject.source_remove(self.checker_callback_tag)

702

self.checker_callback(pid, status,

703

self.current_checker_command)

953

if self.checker is not None and not self.checker.is_alive():

954

logger.warning("Checker was not alive; joining")

955

self.checker.join()

956

self.checker = None

704

957

# Start a new checker if needed

705

958

if self.checker is None:

706

959

# Escape attributes for the shell

715

968

exc_info=error)

716

969

return True # Try again later

717

970

self.current_checker_command = command

718

try:

719

logger.info("Starting checker %r for %s", command,

720

self.name)

721

# We don't need to redirect stdout and stderr, since

722

# in normal mode, that is already done by daemon(),

723

# and in debug mode we don't want to. (Stdin is

724

# always replaced by /dev/null.)

725

# The exception is when not debugging but nevertheless

726

# running in the foreground; use the previously

727

# created wnull.

728

popen_args = {}

729

if (not self.server_settings["debug"]

730

and self.server_settings["foreground"]):

731

popen_args.update({"stdout": wnull,

732

"stderr": wnull })

733

self.checker = subprocess.Popen(command,

734

close_fds=True,

735

shell=True,

736

cwd="/",

737

**popen_args)

738

except OSError as error:

739

logger.error("Failed to start subprocess",

740

exc_info=error)

741

return True

742

self.checker_callback_tag = gobject.child_watch_add(

743

self.checker.pid, self.checker_callback, data=command)

744

# The checker may have completed before the gobject

745

# watch was added. Check for this.

746

try:

747

pid, status = os.waitpid(self.checker.pid, os.WNOHANG)

748

except OSError as error:

749

if error.errno == errno.ECHILD:

750

# This should never happen

751

logger.error("Child process vanished",

752

exc_info=error)

753

return True

754

raise

755

if pid:

756

gobject.source_remove(self.checker_callback_tag)

757

self.checker_callback(pid, status, command)

971

logger.info("Starting checker %r for %s", command,

972

self.name)

973

# We don't need to redirect stdout and stderr, since

974

# in normal mode, that is already done by daemon(),

975

# and in debug mode we don't want to. (Stdin is

976

# always replaced by /dev/null.)

977

# The exception is when not debugging but nevertheless

978

# running in the foreground; use the previously

979

# created wnull.

980

popen_args = { "close_fds": True,

981

"shell": True,

982

"cwd": "/" }

983

if (not self.server_settings["debug"]

984

and self.server_settings["foreground"]):

985

popen_args.update({"stdout": wnull,

986

"stderr": wnull })

987

pipe = multiprocessing.Pipe(duplex = False)

988

self.checker = multiprocessing.Process(

989

target = call_pipe,

990

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

991

kwargs = popen_args)

992

self.checker.start()

993

self.checker_callback_tag = gobject.io_add_watch(

994

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

995

self.checker_callback, pipe[0], command)

758

996

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

759

997

return True

760

998

766

1004

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

767

1005

return

768

1006

logger.debug("Stopping checker for %(name)s", vars(self))

769

try:

770

self.checker.terminate()

771

#time.sleep(0.5)

772

#if self.checker.poll() is None:

773

# self.checker.kill()

774

except OSError as error:

775

if error.errno != errno.ESRCH: # No such process

776

raise

1007

self.checker.terminate()

777

1008

self.checker = None

778

1009

779

1010

843

1074

access="r")

844

1075

def Property_dbus_property(self):

845

1076

return dbus.Boolean(False)

1077

1078

See also the DBusObjectWithAnnotations class.

846

1079

"""

847

1080

848

1081

def decorator(func):

870

1103

pass

871

1104

872

1105

873

class DBusObjectWithProperties(dbus.service.Object):

874

"""A D-Bus object with properties.

1106

class DBusObjectWithAnnotations(dbus.service.Object):

1107

"""A D-Bus object with annotations.

875

1108

876

Classes inheriting from this can use the dbus_service_property

877

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

878

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

1109

Classes inheriting from this can use the dbus_annotations

1110

decorator to add annotations to methods or signals.

879

1111

"""

880

1112

881

1113

@staticmethod

897

1129

for name, athing in

898

1130

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

899

1131

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

900

1203

def _get_dbus_property(self, interface_name, property_name):

901

1204

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

902

1205

property with the specified name and interface.

912

1215

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

913

1216

self.dbus_object_path, interface_name, property_name))

914

1217

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

915

1227

@dbus.service.method(dbus.PROPERTIES_IFACE,

916

1228

in_signature="ss",

917

1229

out_signature="v")

987

1299

988

1300

Inserts property tags and interface annotation tags.

989

1301

"""

990

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

991

connection)

1302

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1303

object_path,

1304

connection)

992

1305

try:

993

1306

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

994

1307

1007

1320

if prop._dbus_interface

1008

1321

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

1009

1322

if_tag.appendChild(tag)

1010

# Add annotation tags

1011

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

1012

for tag in if_tag.getElementsByTagName(typ):

1013

annots = dict()

1014

for name, prop in (self.

1015

_get_all_dbus_things(typ)):

1016

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

1017

and prop._dbus_interface

1018

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

1019

annots.update(getattr(

1020

prop, "_dbus_annotations", {}))

1021

for name, value in annots.items():

1022

ann_tag = document.createElement(

1023

"annotation")

1024

ann_tag.setAttribute("name", name)

1025

ann_tag.setAttribute("value", value)

1026

tag.appendChild(ann_tag)

1027

# Add interface annotation tags

1028

for annotation, value in dict(

1029

itertools.chain.from_iterable(

1030

annotations().items()

1031

for name, annotations

1032

in self._get_all_dbus_things("interface")

1033

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

1034

)).items():

1035

ann_tag = document.createElement("annotation")

1036

ann_tag.setAttribute("name", annotation)

1037

ann_tag.setAttribute("value", value)

1038

if_tag.appendChild(ann_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)

1039

1339

# Add the names to the return values for the

1040

1340

# "org.freedesktop.DBus.Properties" methods

1041

1341

if (if_tag.getAttribute("name")

1059

1359

exc_info=error)

1060

1360

return xmlstring

1061

1361

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

1062

1430

1063

1431

def datetime_to_dbus(dt, variant_level=0):

1064

1432

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

1111

1479

interface_names.add(alt_interface)

1112

1480

# Is this a D-Bus signal?

1113

1481

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

1114

# Extract the original non-method undecorated

1115

# function by black magic

1116

nonmethod_func = (dict(

1117

zip(attribute.func_code.co_freevars,

1118

attribute.__closure__))

1119

["func"].cell_contents)

1482

if sys.version_info.major == 2:

1483

# Extract the original non-method undecorated

1484

# function by black magic

1485

nonmethod_func = (dict(

1486

zip(attribute.func_code.co_freevars,

1487

attribute.__closure__))

1488

["func"].cell_contents)

1489

else:

1490

nonmethod_func = attribute

1120

1491

# Create a new, but exactly alike, function

1121

1492

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

1122

1493

# with the alternate D-Bus interface name

1494

if sys.version_info.major == 2:

1495

new_function = types.FunctionType(

1496

nonmethod_func.func_code,

1497

nonmethod_func.func_globals,

1498

nonmethod_func.func_name,

1499

nonmethod_func.func_defaults,

1500

nonmethod_func.func_closure)

1501

else:

1502

new_function = types.FunctionType(

1503

nonmethod_func.__code__,

1504

nonmethod_func.__globals__,

1505

nonmethod_func.__name__,

1506

nonmethod_func.__defaults__,

1507

nonmethod_func.__closure__)

1123

1508

new_function = (dbus.service.signal(

1124

alt_interface, attribute._dbus_signature)

1125

(types.FunctionType(

1126

nonmethod_func.func_code,

1127

nonmethod_func.func_globals,

1128

nonmethod_func.func_name,

1129

nonmethod_func.func_defaults,

1130

nonmethod_func.func_closure)))

1509

alt_interface,

1510

attribute._dbus_signature)(new_function))

1131

1511

# Copy annotations, if any

1132

1512

try:

1133

1513

new_function._dbus_annotations = dict(

1143

1523

func1 and func2 to the "call_both" function

1144

1524

outside of its arguments"""

1145

1525

1526

@functools.wraps(func2)

1146

1527

def call_both(*args, **kwargs):

1147

1528

"""This function will emit two D-Bus

1148

1529

signals by calling func1 and func2"""

1149

1530

func1(*args, **kwargs)

1150

1531

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)

1151

1536

1152

1537

return call_both

1153

1538

# Create the "call_both" function and add it to

1356

1741

DBusObjectWithProperties.__del__(self, *args, **kwargs)

1357

1742

Client.__del__(self, *args, **kwargs)

1358

1743

1359

def checker_callback(self, pid, condition, command,

1360

*args, **kwargs):

1361

self.checker_callback_tag = None

1362

self.checker = None

1363

if os.WIFEXITED(condition):

1364

exitstatus = os.WEXITSTATUS(condition)

1744

def checker_callback(self, source, condition,

1745

connection, command, *args, **kwargs):

1746

ret = Client.checker_callback(self, source, condition,

1747

connection, command, *args,

1748

**kwargs)

1749

exitstatus = self.last_checker_status

1750

if exitstatus >= 0:

1365

1751

# Emit D-Bus signal

1366

1752

self.CheckerCompleted(dbus.Int16(exitstatus),

1367

dbus.Int64(condition),

1753

# This is specific to GNU libC

1754

dbus.Int64(exitstatus << 8),

1368

1755

dbus.String(command))

1369

1756

else:

1370

1757

# Emit D-Bus signal

1371

1758

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

1372

dbus.Int64(condition),

1759

dbus.Int64(

1760

# This is specific to GNU libC

1761

(exitstatus << 8)

1762

| self.last_checker_signal),

1373

1763

dbus.String(command))

1374

1375

return Client.checker_callback(self, pid, condition, command,

1376

*args, **kwargs)

1764

return ret

1377

1765

1378

1766

def start_checker(self, *args, **kwargs):

1379

1767

old_checker_pid = getattr(self.checker, "pid", None)

1454

1842

self.checked_ok()

1455

1843

1456

1844

# Enable - method

1845

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

1457

1846

@dbus.service.method(_interface)

1458

1847

def Enable(self):

1459

1848

"D-Bus method"

1460

1849

self.enable()

1461

1850

1462

1851

# StartChecker - method

1852

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

1463

1853

@dbus.service.method(_interface)

1464

1854

def StartChecker(self):

1465

1855

"D-Bus method"

1466

1856

self.start_checker()

1467

1857

1468

1858

# Disable - method

1859

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

1469

1860

@dbus.service.method(_interface)

1470

1861

def Disable(self):

1471

1862

"D-Bus method"

1472

1863

self.disable()

1473

1864

1474

1865

# StopChecker - method

1866

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

1475

1867

@dbus.service.method(_interface)

1476

1868

def StopChecker(self):

1477

1869

self.stop_checker()

1513

1905

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

1514

1906

1515

1907

# Name - property

1908

@dbus_annotations(

1909

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

1516

1910

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

1517

1911

def Name_dbus_property(self):

1518

1912

return dbus.String(self.name)

1519

1913

1520

1914

# Fingerprint - property

1915

@dbus_annotations(

1916

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

1521

1917

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

1522

1918

def Fingerprint_dbus_property(self):

1523

1919

return dbus.String(self.fingerprint)

1532

1928

self.host = str(value)

1533

1929

1534

1930

# Created - property

1931

@dbus_annotations(

1932

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

1535

1933

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

1536

1934

def Created_dbus_property(self):

1537

1935

return datetime_to_dbus(self.created)

1652

2050

self.stop_checker()

1653

2051

1654

2052

# ObjectPath - property

2053

@dbus_annotations(

2054

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

2055

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

1655

2056

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

1656

2057

def ObjectPath_dbus_property(self):

1657

2058

return self.dbus_object_path # is already a dbus.ObjectPath

1658

2059

1659

2060

# Secret = property

2061

@dbus_annotations(

2062

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

2063

"invalidates"})

1660

2064

@dbus_service_property(_interface,

1661

2065

signature="ay",

1662

2066

access="write",

1708

2112

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

1709

2113

self.server.child_pipe.fileno())

1710

2114

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.

2115

session = gnutls.ClientSession(self.request)

1718

2116

1719

2117

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

1720

2118

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

1724

2122

priority = self.server.gnutls_priority

1725

2123

if priority is None:

1726

2124

priority = "NORMAL"

1727

gnutls.library.functions.gnutls_priority_set_direct(

1728

session._c_object, priority, None)

2125

gnutls.priority_set_direct(session._c_object, priority,

2126

None)

1729

2127

1730

2128

# Start communication using the Mandos protocol

1731

2129

# Get protocol number

1741

2139

# Start GnuTLS connection

1742

2140

try:

1743

2141

session.handshake()

1744

except gnutls.errors.GNUTLSError as error:

2142

except gnutls.Error as error:

1745

2143

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

1746

2144

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

1747

2145

# established. Just abandon the request.

1753

2151

try:

1754

2152

fpr = self.fingerprint(

1755

2153

self.peer_certificate(session))

1756

except (TypeError,

1757

gnutls.errors.GNUTLSError) as error:

2154

except (TypeError, gnutls.Error) as error:

1758

2155

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

1759

2156

return

1760

2157

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

1822

2219

while sent_size < len(client.secret):

1823

2220

try:

1824

2221

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

1825

except gnutls.errors.GNUTLSError as error:

2222

except gnutls.Error as error:

1826

2223

logger.warning("gnutls send failed",

1827

2224

exc_info=error)

1828

2225

return

1843

2240

client.approvals_pending -= 1

1844

2241

try:

1845

2242

session.bye()

1846

except gnutls.errors.GNUTLSError as error:

2243

except gnutls.Error as error:

1847

2244

logger.warning("GnuTLS bye failed",

1848

2245

exc_info=error)

1849

2246

1851

2248

def peer_certificate(session):

1852

2249

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

1853

2250

# 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

2251

if (gnutls.certificate_type_get(session._c_object)

2252

!= gnutls.CRT_OPENPGP):

2253

# ...return invalid data

2254

return b""

1859

2255

list_size = ctypes.c_uint(1)

1860

cert_list = (gnutls.library.functions

1861

.gnutls_certificate_get_peers

2256

cert_list = (gnutls.certificate_get_peers

1862

2257

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

1863

2258

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

1864

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

1865

" certificate")

2259

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

1866

2260

if list_size.value == 0:

1867

2261

return None

1868

2262

cert = cert_list[0]

1872

2266

def fingerprint(openpgp):

1873

2267

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1874

2268

# New GnuTLS "datum" with the OpenPGP public key

1875

datum = gnutls.library.types.gnutls_datum_t(

2269

datum = gnutls.datum_t(

1876

2270

ctypes.cast(ctypes.c_char_p(openpgp),

1877

2271

ctypes.POINTER(ctypes.c_ubyte)),

1878

2272

ctypes.c_uint(len(openpgp)))

1879

2273

# 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))

2274

crt = gnutls.openpgp_crt_t()

2275

gnutls.openpgp_crt_init(ctypes.byref(crt))

1883

2276

# 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)

2277

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

2278

gnutls.OPENPGP_FMT_RAW)

1887

2279

# Verify the self signature in the key

1888

2280

crtverify = ctypes.c_uint()

1889

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1890

crt, 0, ctypes.byref(crtverify))

2281

gnutls.openpgp_crt_verify_self(crt, 0,

2282

ctypes.byref(crtverify))

1891

2283

if crtverify.value != 0:

1892

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1893

raise gnutls.errors.CertificateSecurityError(

1894

"Verify failed")

2284

gnutls.openpgp_crt_deinit(crt)

2285

raise gnutls.CertificateSecurityError("Verify failed")

1895

2286

# New buffer for the fingerprint

1896

2287

buf = ctypes.create_string_buffer(20)

1897

2288

buf_len = ctypes.c_size_t()

1898

2289

# 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))

2290

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

2291

ctypes.byref(buf_len))

1901

2292

# Deinit the certificate

1902

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2293

gnutls.openpgp_crt_deinit(crt)

1903

2294

# Convert the buffer to a Python bytestring

1904

2295

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

1905

2296

# Convert the bytestring to hexadecimal notation

2141

2532

2142

2533

if command == 'getattr':

2143

2534

attrname = request[1]

2144

if callable(client_object.__getattribute__(attrname)):

2535

if isinstance(client_object.__getattribute__(attrname),

2536

collections.Callable):

2145

2537

parent_pipe.send(('function', ))

2146

2538

else:

2147

2539

parent_pipe.send((

2182

2574

# avoid excessive use of external libraries.

2183

2575

2184

2576

# New type for defining tokens, syntax, and semantics all-in-one

2185

Token = collections.namedtuple("Token",

2186

("regexp", # To match token; if

2187

# "value" is not None,

2188

# must have a "group"

2189

# containing digits

2190

"value", # datetime.timedelta or

2191

# None

2192

"followers")) # Tokens valid after

2193

# this token

2194

2577

Token = collections.namedtuple("Token", (

2195

2578

"regexp", # To match token; if "value" is not None, must have

2196

2579

# a "group" containing digits

2231

2614

# Define starting values

2232

2615

value = datetime.timedelta() # Value so far

2233

2616

found_token = None

2234

followers = frozenset((token_duration,)) # Following valid tokens

2617

followers = frozenset((token_duration, )) # Following valid tokens

2235

2618

s = duration # String left to parse

2236

2619

# Loop until end token is found

2237

2620

while found_token is not token_end:

2394

2777

"debug": "False",

2395

2778

"priority":

2396

2779

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

2397

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

2780

":+SIGN-DSA-SHA256",

2398

2781

"servicename": "Mandos",

2399

2782

"use_dbus": "True",

2400

2783

"use_ipv6": "True",

2539

2922

2540

2923

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

2541

2924

# - GnuTLS manual

2542

gnutls.library.functions.gnutls_global_set_log_level(11)

2925

gnutls.global_set_log_level(11)

2543

2926

2544

@gnutls.library.types.gnutls_log_func

2927

@gnutls.log_func

2545

2928

def debug_gnutls(level, string):

2546

2929

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

2547

2930

2548

gnutls.library.functions.gnutls_global_set_log_function(

2549

debug_gnutls)

2931

gnutls.global_set_log_function(debug_gnutls)

2550

2932

2551

2933

# Redirect stdin so all checkers get /dev/null

2552

2934

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

2656

3038

pass

2657

3039

2658

3040

# Clients who has passed its expire date can still be

2659

# enabled if its last checker was successful. Clients

3041

# enabled if its last checker was successful. A Client

2660

3042

# whose checker succeeded before we stored its state is

2661

3043

# assumed to have successfully run all checkers during

2662

3044

# downtime.

2731

3113

2732

3114

@alternate_dbus_interfaces(

2733

3115

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

2734

class MandosDBusService(DBusObjectWithProperties):

3116

class MandosDBusService(DBusObjectWithObjectManager):

2735

3117

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

2736

3118

2737

3119

def __init__(self):

2739

3121

2740

3122

_interface = "se.recompile.Mandos"

2741

3123

2742

@dbus_interface_annotations(_interface)

2743

def _foo(self):

2744

return {

2745

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

2746

"false" }

2747

2748

3124

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

2749

3125

def ClientAdded(self, objpath):

2750

3126

"D-Bus signal"

2755

3131

"D-Bus signal"

2756

3132

pass

2757

3133

3134

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

3135

"true"})

2758

3136

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

2759

3137

def ClientRemoved(self, objpath, name):

2760

3138

"D-Bus signal"

2761

3139

pass

2762

3140

3141

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

3142

"true"})

2763

3143

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

2764

3144

def GetAllClients(self):

2765

3145

"D-Bus method"

2766

3146

return dbus.Array(c.dbus_object_path for c in

2767

3147

tcp_server.clients.itervalues())

2768

3148

3149

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

3150

"true"})

2769

3151

@dbus.service.method(_interface,

2770

3152

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

2771

3153

def GetAllClientsWithProperties(self):

2772

3154

"D-Bus method"

2773

3155

return dbus.Dictionary(

2774

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

3156

{ c.dbus_object_path: c.GetAll(

3157

"se.recompile.Mandos.Client")

2775

3158

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

2776

3159

signature="oa{sv}")

2777

3160

2782

3165

if c.dbus_object_path == object_path:

2783

3166

del tcp_server.clients[c.name]

2784

3167

c.remove_from_connection()

2785

# Don't signal anything except ClientRemoved

3168

# Don't signal the disabling

2786

3169

c.disable(quiet=True)

2787

# Emit D-Bus signal

2788

self.ClientRemoved(object_path, c.name)

3170

# Emit D-Bus signal for removal

3171

self.client_removed_signal(c)

2789

3172

return

2790

3173

raise KeyError(object_path)

2791

3174

2792

3175

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)

2793

3212

2794

3213

mandos_dbus_service = MandosDBusService()

2795

3214

2860

3279

name, client = tcp_server.clients.popitem()

2861

3280

if use_dbus:

2862

3281

client.remove_from_connection()

2863

# Don't signal anything except ClientRemoved

3282

# Don't signal the disabling

2864

3283

client.disable(quiet=True)

3284

# Emit D-Bus signal for removal

2865

3285

if use_dbus:

2866

# Emit D-Bus signal

2867

mandos_dbus_service.ClientRemoved(

2868

client.dbus_object_path, client.name)

3286

mandos_dbus_service.client_removed_signal(client)

2869

3287

client_settings.clear()

2870

3288

2871

3289

atexit.register(cleanup)

2872

3290

2873

3291

for client in tcp_server.clients.itervalues():

2874

3292

if use_dbus:

2875

# Emit D-Bus signal

2876

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3293

# Emit D-Bus signal for adding

3294

mandos_dbus_service.client_added_signal(client)

2877

3295

# Need to initiate checking of clients

2878

3296

if client.enabled:

2879

3297

client.init_checker()