/mandos/trunk : revision 742

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

36

37

from future_builtins import *

38

39

try:

40

import SocketServer as socketserver

41

except ImportError:

42

import socketserver

39

import SocketServer as socketserver

43

40

import socket

44

41

import argparse

45

42

import datetime

50

47

import gnutls.library.functions

51

48

import gnutls.library.constants

52

49

import gnutls.library.types

53

try:

54

import ConfigParser as configparser

55

except ImportError:

56

import configparser

50

import ConfigParser as configparser

57

51

import sys

58

52

import re

59

53

import os

68

62

import struct

69

63

import fcntl

70

64

import functools

71

try:

72

import cPickle as pickle

73

except ImportError:

74

import pickle

65

import cPickle as pickle

75

66

import multiprocessing

76

67

import types

77

68

import binascii

78

69

import tempfile

79

70

import itertools

80

71

import collections

81

import codecs

82

72

83

73

import dbus

84

74

import dbus.service

85

try:

86

import gobject

87

except ImportError:

88

from gi.repository import GObject as gobject

75

import gobject

89

76

import avahi

90

77

from dbus.mainloop.glib import DBusGMainLoop

91

78

import ctypes

111

98

syslogger = None

112

99

113

100

try:

114

if_nametoindex = ctypes.cdll.LoadLibrary(

115

ctypes.util.find_library("c")).if_nametoindex

101

if_nametoindex = (ctypes.cdll.LoadLibrary

102

(ctypes.util.find_library("c"))

103

.if_nametoindex)

116

104

except (OSError, AttributeError):

117

118

105

def if_nametoindex(interface):

119

106

"Get an interface index the hard way, i.e. using fcntl()"

120

107

SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h

129

116

"""init logger and add loglevel"""

130

117

131

118

global syslogger

132

syslogger = (logging.handlers.SysLogHandler(

133

facility = logging.handlers.SysLogHandler.LOG_DAEMON,

134

address = "/dev/log"))

119

syslogger = (logging.handlers.SysLogHandler

120

(facility =

121

logging.handlers.SysLogHandler.LOG_DAEMON,

122

address = "/dev/log"))

135

123

syslogger.setFormatter(logging.Formatter

136

124

('Mandos [%(process)d]: %(levelname)s:'

137

125

' %(message)s'))

154

142

155

143

class PGPEngine(object):

156

144

"""A simple class for OpenPGP symmetric encryption & decryption"""

157

158

145

def __init__(self):

159

146

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

160

147

self.gnupgargs = ['--batch',

199

186

200

187

def encrypt(self, data, password):

201

188

passphrase = self.password_encode(password)

202

with tempfile.NamedTemporaryFile(

203

dir=self.tempdir) as passfile:

189

with tempfile.NamedTemporaryFile(dir=self.tempdir

190

) as passfile:

204

191

passfile.write(passphrase)

205

192

passfile.flush()

206

193

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

217

204

218

205

def decrypt(self, data, password):

219

206

passphrase = self.password_encode(password)

220

with tempfile.NamedTemporaryFile(

221

dir = self.tempdir) as passfile:

207

with tempfile.NamedTemporaryFile(dir = self.tempdir

208

) as passfile:

222

209

passfile.write(passphrase)

223

210

passfile.flush()

224

211

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

228

215

stdin = subprocess.PIPE,

229

216

stdout = subprocess.PIPE,

230

217

stderr = subprocess.PIPE)

231

decrypted_plaintext, err = proc.communicate(input = data)

218

decrypted_plaintext, err = proc.communicate(input

219

= data)

232

220

if proc.returncode != 0:

233

221

raise PGPError(err)

234

222

return decrypted_plaintext

240

228

return super(AvahiError, self).__init__(value, *args,

241

229

**kwargs)

242

230

243

244

231

class AvahiServiceError(AvahiError):

245

232

pass

246

233

247

248

234

class AvahiGroupError(AvahiError):

249

235

pass

250

236

270

256

bus: dbus.SystemBus()

271

257

"""

272

258

273

def __init__(self,

274

interface = avahi.IF_UNSPEC,

275

name = None,

276

servicetype = None,

277

port = None,

278

TXT = None,

279

domain = "",

280

host = "",

281

max_renames = 32768,

282

protocol = avahi.PROTO_UNSPEC,

283

bus = None):

259

def __init__(self, interface = avahi.IF_UNSPEC, name = None,

260

servicetype = None, port = None, TXT = None,

261

domain = "", host = "", max_renames = 32768,

262

protocol = avahi.PROTO_UNSPEC, bus = None):

284

263

self.interface = interface

285

264

self.name = name

286

265

self.type = servicetype

303

282

" after %i retries, exiting.",

304

283

self.rename_count)

305

284

raise AvahiServiceError("Too many renames")

306

self.name = str(

307

self.server.GetAlternativeServiceName(self.name))

285

self.name = str(self.server

286

.GetAlternativeServiceName(self.name))

308

287

self.rename_count += 1

309

288

logger.info("Changing Zeroconf service name to %r ...",

310

289

self.name)

365

344

elif state == avahi.ENTRY_GROUP_FAILURE:

366

345

logger.critical("Avahi: Error in group state changed %s",

367

346

str(error))

368

raise AvahiGroupError("State changed: {!s}".format(error))

347

raise AvahiGroupError("State changed: {!s}"

348

.format(error))

369

349

370

350

def cleanup(self):

371

351

"""Derived from the Avahi example code"""

381

361

def server_state_changed(self, state, error=None):

382

362

"""Derived from the Avahi example code"""

383

363

logger.debug("Avahi server state change: %i", state)

384

bad_states = {

385

avahi.SERVER_INVALID: "Zeroconf server invalid",

386

avahi.SERVER_REGISTERING: None,

387

avahi.SERVER_COLLISION: "Zeroconf server name collision",

388

avahi.SERVER_FAILURE: "Zeroconf server failure",

389

}

364

bad_states = { avahi.SERVER_INVALID:

365

"Zeroconf server invalid",

366

avahi.SERVER_REGISTERING: None,

367

avahi.SERVER_COLLISION:

368

"Zeroconf server name collision",

369

avahi.SERVER_FAILURE:

370

"Zeroconf server failure" }

390

371

if state in bad_states:

391

372

if bad_states[state] is not None:

392

373

if error is None:

411

392

follow_name_owner_changes=True),

412

393

avahi.DBUS_INTERFACE_SERVER)

413

394

self.server.connect_to_signal("StateChanged",

414

self.server_state_changed)

395

self.server_state_changed)

415

396

self.server_state_changed(self.server.GetState())

416

397

417

398

419

400

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

420

401

"""Add the new name to the syslog messages"""

421

402

ret = AvahiService.rename(self, *args, **kwargs)

422

syslogger.setFormatter(logging.Formatter(

423

'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'

424

.format(self.name)))

403

syslogger.setFormatter(logging.Formatter

404

('Mandos ({}) [%(process)d]:'

405

' %(levelname)s: %(message)s'

406

.format(self.name)))

425

407

return ret

426

408

427

def call_pipe(connection, # : multiprocessing.Connection

428

func, *args, **kwargs):

429

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

430

431

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

432

return value on the provided multiprocessing.Connection.

433

"""

434

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

435

connection.close()

436

409

437

410

class Client(object):

438

411

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

465

438

last_checker_status: integer between 0 and 255 reflecting exit

466

439

status of last checker. -1 reflects crashed

467

440

checker, -2 means no checker completed yet.

468

last_checker_signal: The signal which killed the last checker, if

469

last_checker_status is -1

470

441

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

471

442

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

472

443

D-Bus identifiers

485

456

"fingerprint", "host", "interval",

486

457

"last_approval_request", "last_checked_ok",

487

458

"last_enabled", "name", "timeout")

488

client_defaults = {

489

"timeout": "PT5M",

490

"extended_timeout": "PT15M",

491

"interval": "PT2M",

492

"checker": "fping -q -- %%(host)s",

493

"host": "",

494

"approval_delay": "PT0S",

495

"approval_duration": "PT1S",

496

"approved_by_default": "True",

497

"enabled": "True",

498

}

459

client_defaults = { "timeout": "PT5M",

460

"extended_timeout": "PT15M",

461

"interval": "PT2M",

462

"checker": "fping -q -- %%(host)s",

463

"host": "",

464

"approval_delay": "PT0S",

465

"approval_duration": "PT1S",

466

"approved_by_default": "True",

467

"enabled": "True",

468

}

499

469

500

470

@staticmethod

501

471

def config_parser(config):

579

549

self.current_checker_command = None

580

550

self.approved = None

581

551

self.approvals_pending = 0

582

self.changedstate = multiprocessing_manager.Condition(

583

multiprocessing_manager.Lock())

584

self.client_structure = [attr

585

for attr in self.__dict__.iterkeys()

552

self.changedstate = (multiprocessing_manager

553

.Condition(multiprocessing_manager

554

.Lock()))

555

self.client_structure = [attr for attr in

556

self.__dict__.iterkeys()

586

557

if not attr.startswith("_")]

587

558

self.client_structure.append("client_structure")

588

559

589

for name, t in inspect.getmembers(

590

type(self), lambda obj: isinstance(obj, property)):

560

for name, t in inspect.getmembers(type(self),

561

lambda obj:

562

isinstance(obj,

563

property)):

591

564

if not name.startswith("_"):

592

565

self.client_structure.append(name)

593

566

635

608

# and every interval from then on.

636

609

if self.checker_initiator_tag is not None:

637

610

gobject.source_remove(self.checker_initiator_tag)

638

self.checker_initiator_tag = gobject.timeout_add(

639

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

640

self.start_checker)

611

self.checker_initiator_tag = (gobject.timeout_add

612

(int(self.interval

613

.total_seconds() * 1000),

614

self.start_checker))

641

615

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

642

616

if self.disable_initiator_tag is not None:

643

617

gobject.source_remove(self.disable_initiator_tag)

644

self.disable_initiator_tag = gobject.timeout_add(

645

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

618

self.disable_initiator_tag = (gobject.timeout_add

619

(int(self.timeout

620

.total_seconds() * 1000),

621

self.disable))

646

622

# Also start a new checker *right now*.

647

623

self.start_checker()

648

624

649

def checker_callback(self, source, condition, connection,

650

command):

625

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

651

626

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

652

627

self.checker_callback_tag = None

653

628

self.checker = None

654

# Read return code from connection (see call_pipe)

655

returncode = connection.recv()

656

connection.close()

657

658

if returncode >= 0:

659

self.last_checker_status = returncode

660

self.last_checker_signal = None

629

if os.WIFEXITED(condition):

630

self.last_checker_status = os.WEXITSTATUS(condition)

661

631

if self.last_checker_status == 0:

662

632

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

663

633

vars(self))

664

634

self.checked_ok()

665

635

else:

666

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

636

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

637

vars(self))

667

638

else:

668

639

self.last_checker_status = -1

669

self.last_checker_signal = -returncode

670

640

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

671

641

vars(self))

672

return False

673

642

674

643

def checked_ok(self):

675

644

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

676

645

self.last_checked_ok = datetime.datetime.utcnow()

677

646

self.last_checker_status = 0

678

self.last_checker_signal = None

679

647

self.bump_timeout()

680

648

681

649

def bump_timeout(self, timeout=None):

686

654

gobject.source_remove(self.disable_initiator_tag)

687

655

self.disable_initiator_tag = None

688

656

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

689

self.disable_initiator_tag = gobject.timeout_add(

690

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

657

self.disable_initiator_tag = (gobject.timeout_add

658

(int(timeout.total_seconds()

659

* 1000), self.disable))

691

660

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

692

661

693

662

def need_approval(self):

707

676

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

708

677

# should be.

709

678

710

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

711

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

712

self.checker.join()

713

self.checker = None

679

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

680

try:

681

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

682

except AttributeError:

683

pass

684

except OSError as error:

685

if error.errno != errno.ECHILD:

686

raise

687

else:

688

if pid:

689

logger.warning("Checker was a zombie")

690

gobject.source_remove(self.checker_callback_tag)

691

self.checker_callback(pid, status,

692

self.current_checker_command)

714

693

# Start a new checker if needed

715

694

if self.checker is None:

716

695

# Escape attributes for the shell

717

escaped_attrs = {

718

attr: re.escape(str(getattr(self, attr)))

719

for attr in self.runtime_expansions }

696

escaped_attrs = { attr:

697

re.escape(str(getattr(self, attr)))

698

for attr in self.runtime_expansions }

720

699

try:

721

700

command = self.checker_command % escaped_attrs

722

701

except TypeError as error:

723

702

logger.error('Could not format string "%s"',

724

self.checker_command,

703

self.checker_command, exc_info=error)

704

return True # Try again later

705

self.current_checker_command = command

706

try:

707

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

708

command, self.name)

709

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

710

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

711

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

712

# always replaced by /dev/null.)

713

# The exception is when not debugging but nevertheless

714

# running in the foreground; use the previously

715

# created wnull.

716

popen_args = {}

717

if (not self.server_settings["debug"]

718

and self.server_settings["foreground"]):

719

popen_args.update({"stdout": wnull,

720

"stderr": wnull })

721

self.checker = subprocess.Popen(command,

722

close_fds=True,

723

shell=True, cwd="/",

724

**popen_args)

725

except OSError as error:

726

logger.error("Failed to start subprocess",

725

727

exc_info=error)

726

return True # Try again later

727

self.current_checker_command = command

728

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

729

self.name)

730

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

731

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

732

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

733

# always replaced by /dev/null.)

734

# The exception is when not debugging but nevertheless

735

# running in the foreground; use the previously

736

# created wnull.

737

popen_args = { "close_fds": True,

738

"shell": True,

739

"cwd": "/" }

740

if (not self.server_settings["debug"]

741

and self.server_settings["foreground"]):

742

popen_args.update({"stdout": wnull,

743

"stderr": wnull })

744

pipe = multiprocessing.Pipe(duplex = False)

745

self.checker = multiprocessing.Process(

746

target = call_pipe,

747

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

748

kwargs = popen_args)

749

self.checker.start()

750

self.checker_callback_tag = gobject.io_add_watch(

751

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

752

self.checker_callback, pipe[0], command)

728

return True

729

self.checker_callback_tag = (gobject.child_watch_add

730

(self.checker.pid,

731

self.checker_callback,

732

data=command))

733

# The checker may have completed before the gobject

734

# watch was added. Check for this.

735

try:

736

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

737

except OSError as error:

738

if error.errno == errno.ECHILD:

739

# This should never happen

740

logger.error("Child process vanished",

741

exc_info=error)

742

return True

743

raise

744

if pid:

745

gobject.source_remove(self.checker_callback_tag)

746

self.checker_callback(pid, status, command)

753

747

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

754

748

return True

755

749

761

755

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

762

756

return

763

757

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

764

self.checker.terminate()

758

try:

759

self.checker.terminate()

760

#time.sleep(0.5)

761

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

762

# self.checker.kill()

763

except OSError as error:

764

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

765

raise

765

766

self.checker = None

766

767

768

def dbus_service_property(dbus_interface,

769

signature="v",

770

access="readwrite",

771

byte_arrays=False):

769

def dbus_service_property(dbus_interface, signature="v",

770

access="readwrite", byte_arrays=False):

772

771

"""Decorators for marking methods of a DBusObjectWithProperties to

773

772

become properties on the D-Bus.

774

773

784

783

if byte_arrays and signature != "ay":

785

784

raise ValueError("Byte arrays not supported for non-'ay'"

786

785

" signature {!r}".format(signature))

787

788

786

def decorator(func):

789

787

func._dbus_is_property = True

790

788

func._dbus_interface = dbus_interface

795

793

func._dbus_name = func._dbus_name[:-14]

796

794

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

797

795

return func

798

799

796

return decorator

800

797

801

798

810

807

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

811

808

"false"}

812

809

"""

813

814

810

def decorator(func):

815

811

func._dbus_is_interface = True

816

812

func._dbus_interface = dbus_interface

817

813

func._dbus_name = dbus_interface

818

814

return func

819

820

815

return decorator

821

816

822

817

832

827

def Property_dbus_property(self):

833

828

return dbus.Boolean(False)

834

829

"""

835

836

830

def decorator(func):

837

831

func._dbus_annotations = annotations

838

832

return func

839

840

833

return decorator

841

834

842

835

845

838

"""

846

839

pass

847

840

848

849

841

class DBusPropertyAccessException(DBusPropertyException):

850

842

"""A property's access permissions disallows an operation.

851

843

"""

879

871

def _get_all_dbus_things(self, thing):

880

872

"""Returns a generator of (name, attribute) pairs

881

873

"""

882

return ((getattr(athing.__get__(self), "_dbus_name", name),

874

return ((getattr(athing.__get__(self), "_dbus_name",

875

name),

883

876

athing.__get__(self))

884

877

for cls in self.__class__.__mro__

885

878

for name, athing in

886

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

879

inspect.getmembers(cls,

880

self._is_dbus_thing(thing)))

887

881

888

882

def _get_dbus_property(self, interface_name, property_name):

889

883

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

890

884

property with the specified name and interface.

891

885

"""

892

for cls in self.__class__.__mro__:

893

for name, value in inspect.getmembers(

894

cls, self._is_dbus_thing("property")):

886

for cls in self.__class__.__mro__:

887

for name, value in (inspect.getmembers

888

(cls,

889

self._is_dbus_thing("property"))):

895

890

if (value._dbus_name == property_name

896

891

and value._dbus_interface == interface_name):

897

892

return value.__get__(self)

898

893

899

894

# No such property

900

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

901

self.dbus_object_path, interface_name, property_name))

895

raise DBusPropertyNotFound(self.dbus_object_path + ":"

896

+ interface_name + "."

897

+ property_name)

902

898

903

@dbus.service.method(dbus.PROPERTIES_IFACE,

904

in_signature="ss",

899

@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",

905

900

out_signature="v")

906

901

def Get(self, interface_name, property_name):

907

902

"""Standard D-Bus property Get() method, see D-Bus standard.

932

927

for byte in value))

933

928

prop(value)

934

929

935

@dbus.service.method(dbus.PROPERTIES_IFACE,

936

in_signature="s",

930

@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",

937

931

out_signature="a{sv}")

938

932

def GetAll(self, interface_name):

939

933

"""Standard D-Bus property GetAll() method, see D-Bus

954

948

if not hasattr(value, "variant_level"):

955

949

properties[name] = value

956

950

continue

957

properties[name] = type(value)(

958

value, variant_level = value.variant_level + 1)

951

properties[name] = type(value)(value, variant_level=

952

value.variant_level+1)

959

953

return dbus.Dictionary(properties, signature="sv")

960

954

961

955

@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")

979

973

connection)

980

974

try:

981

975

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

982

983

976

def make_tag(document, name, prop):

984

977

e = document.createElement("property")

985

978

e.setAttribute("name", name)

986

979

e.setAttribute("type", prop._dbus_signature)

987

980

e.setAttribute("access", prop._dbus_access)

988

981

return e

989

990

982

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

991

983

# Add property tags

992

984

for tag in (make_tag(document, name, prop)

1004

996

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

1005

997

and prop._dbus_interface

1006

998

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

1007

annots.update(getattr(

1008

prop, "_dbus_annotations", {}))

999

annots.update(getattr

1000

(prop,

1001

"_dbus_annotations",

1002

{}))

1009

1003

for name, value in annots.items():

1010

1004

ann_tag = document.createElement(

1011

1005

"annotation")

1016

1010

for annotation, value in dict(

1017

1011

itertools.chain.from_iterable(

1018

1012

annotations().items()

1019

for name, annotations

1020

in self._get_all_dbus_things("interface")

1013

for name, annotations in

1014

self._get_all_dbus_things("interface")

1021

1015

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

1022

1016

)).items():

1023

1017

ann_tag = document.createElement("annotation")

1052

1046

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

1053

1047

if dt is None:

1054

1048

return dbus.String("", variant_level = variant_level)

1055

return dbus.String(dt.isoformat(), variant_level=variant_level)

1049

return dbus.String(dt.isoformat(),

1050

variant_level=variant_level)

1056

1051

1057

1052

1058

1053

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1078

1073

(from DBusObjectWithProperties) and interfaces (from the

1079

1074

dbus_interface_annotations decorator).

1080

1075

"""

1081

1082

1076

def wrapper(cls):

1083

1077

for orig_interface_name, alt_interface_name in (

1084

alt_interface_names.items()):

1078

alt_interface_names.items()):

1085

1079

attr = {}

1086

1080

interface_names = set()

1087

1081

# Go though all attributes of the class

1089

1083

# Ignore non-D-Bus attributes, and D-Bus attributes

1090

1084

# with the wrong interface name

1091

1085

if (not hasattr(attribute, "_dbus_interface")

1092

or not attribute._dbus_interface.startswith(

1093

orig_interface_name)):

1086

or not attribute._dbus_interface

1087

.startswith(orig_interface_name)):

1094

1088

continue

1095

1089

# Create an alternate D-Bus interface name based on

1096

1090

# the current name

1097

alt_interface = attribute._dbus_interface.replace(

1098

orig_interface_name, alt_interface_name)

1091

alt_interface = (attribute._dbus_interface

1092

.replace(orig_interface_name,

1093

alt_interface_name))

1099

1094

interface_names.add(alt_interface)

1100

1095

# Is this a D-Bus signal?

1101

1096

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

1102

if sys.version_info.major == 2:

1103

# Extract the original non-method undecorated

1104

# function by black magic

1105

nonmethod_func = (dict(

1097

# Extract the original non-method undecorated

1098

# function by black magic

1099

nonmethod_func = (dict(

1106

1100

zip(attribute.func_code.co_freevars,

1107

attribute.__closure__))

1108

["func"].cell_contents)

1109

else:

1110

nonmethod_func = attribute

1101

attribute.__closure__))["func"]

1102

.cell_contents)

1111

1103

# Create a new, but exactly alike, function

1112

1104

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

1113

1105

# with the alternate D-Bus interface name

1114

if sys.version_info.major == 2:

1115

new_function = types.FunctionType(

1116

nonmethod_func.func_code,

1117

nonmethod_func.func_globals,

1118

nonmethod_func.func_name,

1119

nonmethod_func.func_defaults,

1120

nonmethod_func.func_closure)

1121

else:

1122

new_function = types.FunctionType(

1123

nonmethod_func.__code__,

1124

nonmethod_func.__globals__,

1125

nonmethod_func.__name__,

1126

nonmethod_func.__defaults__,

1127

nonmethod_func.__closure__)

1128

new_function = (dbus.service.signal(

1129

alt_interface,

1130

attribute._dbus_signature)(new_function))

1106

new_function = (dbus.service.signal

1107

(alt_interface,

1108

attribute._dbus_signature)

1109

(types.FunctionType(

1110

nonmethod_func.func_code,

1111

nonmethod_func.func_globals,

1112

nonmethod_func.func_name,

1113

nonmethod_func.func_defaults,

1114

nonmethod_func.func_closure)))

1131

1115

# Copy annotations, if any

1132

1116

try:

1133

new_function._dbus_annotations = dict(

1134

attribute._dbus_annotations)

1117

new_function._dbus_annotations = (

1118

dict(attribute._dbus_annotations))

1135

1119

except AttributeError:

1136

1120

pass

1137

1121

# Define a creator of a function to call both the

1142

1126

"""This function is a scope container to pass

1143

1127

func1 and func2 to the "call_both" function

1144

1128

outside of its arguments"""

1145

1146

1129

def call_both(*args, **kwargs):

1147

1130

"""This function will emit two D-Bus

1148

1131

signals by calling func1 and func2"""

1149

1132

func1(*args, **kwargs)

1150

1133

func2(*args, **kwargs)

1151

1152

1134

return call_both

1153

1135

# Create the "call_both" function and add it to

1154

1136

# the class

1159

1141

# object. Decorate it to be a new D-Bus method

1160

1142

# with the alternate D-Bus interface name. Add it

1161

1143

# to the class.

1162

attr[attrname] = (

1163

dbus.service.method(

1164

alt_interface,

1165

attribute._dbus_in_signature,

1166

attribute._dbus_out_signature)

1167

(types.FunctionType(attribute.func_code,

1168

attribute.func_globals,

1169

attribute.func_name,

1170

attribute.func_defaults,

1171

attribute.func_closure)))

1144

attr[attrname] = (dbus.service.method

1145

(alt_interface,

1146

attribute._dbus_in_signature,

1147

attribute._dbus_out_signature)

1148

(types.FunctionType

1149

(attribute.func_code,

1150

attribute.func_globals,

1151

attribute.func_name,

1152

attribute.func_defaults,

1153

attribute.func_closure)))

1172

1154

# Copy annotations, if any

1173

1155

try:

1174

attr[attrname]._dbus_annotations = dict(

1175

attribute._dbus_annotations)

1156

attr[attrname]._dbus_annotations = (

1157

dict(attribute._dbus_annotations))

1176

1158

except AttributeError:

1177

1159

pass

1178

1160

# Is this a D-Bus property?

1181

1163

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

1182

1164

# property with the alternate D-Bus interface

1183

1165

# name. Add it to the class.

1184

attr[attrname] = (dbus_service_property(

1185

alt_interface, attribute._dbus_signature,

1186

attribute._dbus_access,

1187

attribute._dbus_get_args_options

1188

["byte_arrays"])

1189

(types.FunctionType(

1190

attribute.func_code,

1191

attribute.func_globals,

1192

attribute.func_name,

1193

attribute.func_defaults,

1194

attribute.func_closure)))

1166

attr[attrname] = (dbus_service_property

1167

(alt_interface,

1168

attribute._dbus_signature,

1169

attribute._dbus_access,

1170

attribute

1171

._dbus_get_args_options

1172

["byte_arrays"])

1173

(types.FunctionType

1174

(attribute.func_code,

1175

attribute.func_globals,

1176

attribute.func_name,

1177

attribute.func_defaults,

1178

attribute.func_closure)))

1195

1179

# Copy annotations, if any

1196

1180

try:

1197

attr[attrname]._dbus_annotations = dict(

1198

attribute._dbus_annotations)

1181

attr[attrname]._dbus_annotations = (

1182

dict(attribute._dbus_annotations))

1199

1183

except AttributeError:

1200

1184

pass

1201

1185

# Is this a D-Bus interface?

1204

1188

# object. Decorate it to be a new D-Bus interface

1205

1189

# with the alternate D-Bus interface name. Add it

1206

1190

# to the class.

1207

attr[attrname] = (

1208

dbus_interface_annotations(alt_interface)

1209

(types.FunctionType(attribute.func_code,

1210

attribute.func_globals,

1211

attribute.func_name,

1212

attribute.func_defaults,

1213

attribute.func_closure)))

1191

attr[attrname] = (dbus_interface_annotations

1192

(alt_interface)

1193

(types.FunctionType

1194

(attribute.func_code,

1195

attribute.func_globals,

1196

attribute.func_name,

1197

attribute.func_defaults,

1198

attribute.func_closure)))

1214

1199

if deprecate:

1215

1200

# Deprecate all alternate interfaces

1216

1201

iname="_AlternateDBusNames_interface_annotation{}"

1217

1202

for interface_name in interface_names:

1218

1219

1203

@dbus_interface_annotations(interface_name)

1220

1204

def func(self):

1221

1205

return { "org.freedesktop.DBus.Deprecated":

1222

"true" }

1206

"true" }

1223

1207

# Find an unused name

1224

1208

for aname in (iname.format(i)

1225

1209

for i in itertools.count()):

1230

1214

# Replace the class with a new subclass of it with

1231

1215

# methods, signals, etc. as created above.

1232

1216

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

1233

(cls, ), attr)

1217

(cls,), attr)

1234

1218

return cls

1235

1236

1219

return wrapper

1237

1220

1238

1221

1239

1222

@alternate_dbus_interfaces({"se.recompile.Mandos":

1240

"se.bsnet.fukt.Mandos"})

1223

"se.bsnet.fukt.Mandos"})

1241

1224

class ClientDBus(Client, DBusObjectWithProperties):

1242

1225

"""A Client class using D-Bus

1243

1226

1247

1230

"""

1248

1231

1249

1232

runtime_expansions = (Client.runtime_expansions

1250

+ ("dbus_object_path", ))

1233

+ ("dbus_object_path",))

1251

1234

1252

1235

_interface = "se.recompile.Mandos.Client"

1253

1236

1261

1244

client_object_name = str(self.name).translate(

1262

1245

{ord("."): ord("_"),

1263

1246

ord("-"): ord("_")})

1264

self.dbus_object_path = dbus.ObjectPath(

1265

"/clients/" + client_object_name)

1247

self.dbus_object_path = (dbus.ObjectPath

1248

("/clients/" + client_object_name))

1266

1249

DBusObjectWithProperties.__init__(self, self.bus,

1267

1250

self.dbus_object_path)

1268

1251

1269

def notifychangeproperty(transform_func, dbus_name,

1270

type_func=lambda x: x,

1271

variant_level=1,

1272

invalidate_only=False,

1252

def notifychangeproperty(transform_func,

1253

dbus_name, type_func=lambda x: x,

1254

variant_level=1, invalidate_only=False,

1273

1255

_interface=_interface):

1274

1256

""" Modify a variable so that it's a property which announces

1275

1257

its changes to DBus.

1282

1264

variant_level: D-Bus variant level. Default: 1

1283

1265

"""

1284

1266

attrname = "_{}".format(dbus_name)

1285

1286

1267

def setter(self, value):

1287

1268

if hasattr(self, "dbus_object_path"):

1288

1269

if (not hasattr(self, attrname) or

1289

1270

type_func(getattr(self, attrname, None))

1290

1271

!= type_func(value)):

1291

1272

if invalidate_only:

1292

self.PropertiesChanged(

1293

_interface, dbus.Dictionary(),

1294

dbus.Array((dbus_name, )))

1273

self.PropertiesChanged(_interface,

1274

dbus.Dictionary(),

1275

dbus.Array

1276

((dbus_name,)))

1295

1277

else:

1296

dbus_value = transform_func(

1297

type_func(value),

1298

variant_level = variant_level)

1278

dbus_value = transform_func(type_func(value),

1279

variant_level

1280

=variant_level)

1299

1281

self.PropertyChanged(dbus.String(dbus_name),

1300

1282

dbus_value)

1301

self.PropertiesChanged(

1302

_interface,

1303

dbus.Dictionary({ dbus.String(dbus_name):

1304

dbus_value }),

1305

dbus.Array())

1283

self.PropertiesChanged(_interface,

1284

dbus.Dictionary({

1285

dbus.String(dbus_name):

1286

dbus_value }), dbus.Array())

1306

1287

setattr(self, attrname, value)

1307

1288

1308

1289

return property(lambda self: getattr(self, attrname), setter)

1314

1295

enabled = notifychangeproperty(dbus.Boolean, "Enabled")

1315

1296

last_enabled = notifychangeproperty(datetime_to_dbus,

1316

1297

"LastEnabled")

1317

checker = notifychangeproperty(

1318

dbus.Boolean, "CheckerRunning",

1319

type_func = lambda checker: checker is not None)

1298

checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",

1299

type_func = lambda checker:

1300

checker is not None)

1320

1301

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1321

1302

"LastCheckedOK")

1322

1303

last_checker_status = notifychangeproperty(dbus.Int16,

1325

1306

datetime_to_dbus, "LastApprovalRequest")

1326

1307

approved_by_default = notifychangeproperty(dbus.Boolean,

1327

1308

"ApprovedByDefault")

1328

approval_delay = notifychangeproperty(

1329

dbus.UInt64, "ApprovalDelay",

1330

type_func = lambda td: td.total_seconds() * 1000)

1309

approval_delay = notifychangeproperty(dbus.UInt64,

1310

"ApprovalDelay",

1311

type_func =

1312

lambda td: td.total_seconds()

1313

* 1000)

1331

1314

approval_duration = notifychangeproperty(

1332

1315

dbus.UInt64, "ApprovalDuration",

1333

1316

type_func = lambda td: td.total_seconds() * 1000)

1334

1317

host = notifychangeproperty(dbus.String, "Host")

1335

timeout = notifychangeproperty(

1336

dbus.UInt64, "Timeout",

1337

type_func = lambda td: td.total_seconds() * 1000)

1318

timeout = notifychangeproperty(dbus.UInt64, "Timeout",

1319

type_func = lambda td:

1320

td.total_seconds() * 1000)

1338

1321

extended_timeout = notifychangeproperty(

1339

1322

dbus.UInt64, "ExtendedTimeout",

1340

1323

type_func = lambda td: td.total_seconds() * 1000)

1341

interval = notifychangeproperty(

1342

dbus.UInt64, "Interval",

1343

type_func = lambda td: td.total_seconds() * 1000)

1324

interval = notifychangeproperty(dbus.UInt64,

1325

"Interval",

1326

type_func =

1327

lambda td: td.total_seconds()

1328

* 1000)

1344

1329

checker_command = notifychangeproperty(dbus.String, "Checker")

1345

1330

secret = notifychangeproperty(dbus.ByteArray, "Secret",

1346

1331

invalidate_only=True)

1356

1341

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

1357

1342

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

1358

1343

1359

def checker_callback(self, source, condition,

1360

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

1361

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

1362

connection, command, *args,

1363

**kwargs)

1364

exitstatus = self.last_checker_status

1365

if exitstatus >= 0:

1344

def checker_callback(self, pid, condition, command,

1345

*args, **kwargs):

1346

self.checker_callback_tag = None

1347

self.checker = None

1348

if os.WIFEXITED(condition):

1349

exitstatus = os.WEXITSTATUS(condition)

1366

1350

# Emit D-Bus signal

1367

1351

self.CheckerCompleted(dbus.Int16(exitstatus),

1368

dbus.Int64(0),

1352

dbus.Int64(condition),

1369

1353

dbus.String(command))

1370

1354

else:

1371

1355

# Emit D-Bus signal

1372

1356

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

1373

dbus.Int64(

1374

self.last_checker_signal),

1357

dbus.Int64(condition),

1375

1358

dbus.String(command))

1376

return ret

1359

1360

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

1361

*args, **kwargs)

1377

1362

1378

1363

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

1379

1364

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

1484

1469

return dbus.Boolean(bool(self.approvals_pending))

1485

1470

1486

1471

# ApprovedByDefault - property

1487

@dbus_service_property(_interface,

1488

signature="b",

1472

@dbus_service_property(_interface, signature="b",

1489

1473

access="readwrite")

1490

1474

def ApprovedByDefault_dbus_property(self, value=None):

1491

1475

if value is None: # get

1493

1477

self.approved_by_default = bool(value)

1494

1478

1495

1479

# ApprovalDelay - property

1496

@dbus_service_property(_interface,

1497

signature="t",

1480

@dbus_service_property(_interface, signature="t",

1498

1481

access="readwrite")

1499

1482

def ApprovalDelay_dbus_property(self, value=None):

1500

1483

if value is None: # get

1503

1486

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

1504

1487

1505

1488

# ApprovalDuration - property

1506

@dbus_service_property(_interface,

1507

signature="t",

1489

@dbus_service_property(_interface, signature="t",

1508

1490

access="readwrite")

1509

1491

def ApprovalDuration_dbus_property(self, value=None):

1510

1492

if value is None: # get

1523

1505

return dbus.String(self.fingerprint)

1524

1506

1525

1507

# Host - property

1526

@dbus_service_property(_interface,

1527

signature="s",

1508

@dbus_service_property(_interface, signature="s",

1528

1509

access="readwrite")

1529

1510

def Host_dbus_property(self, value=None):

1530

1511

if value is None: # get

1542

1523

return datetime_to_dbus(self.last_enabled)

1543

1524

1544

1525

# Enabled - property

1545

@dbus_service_property(_interface,

1546

signature="b",

1526

@dbus_service_property(_interface, signature="b",

1547

1527

access="readwrite")

1548

1528

def Enabled_dbus_property(self, value=None):

1549

1529

if value is None: # get

1554

1534

self.disable()

1555

1535

1556

1536

# LastCheckedOK - property

1557

@dbus_service_property(_interface,

1558

signature="s",

1537

@dbus_service_property(_interface, signature="s",

1559

1538

access="readwrite")

1560

1539

def LastCheckedOK_dbus_property(self, value=None):

1561

1540

if value is not None:

1564

1543

return datetime_to_dbus(self.last_checked_ok)

1565

1544

1566

1545

# LastCheckerStatus - property

1567

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

1546

@dbus_service_property(_interface, signature="n",

1547

access="read")

1568

1548

def LastCheckerStatus_dbus_property(self):

1569

1549

return dbus.Int16(self.last_checker_status)

1570

1550

1579

1559

return datetime_to_dbus(self.last_approval_request)

1580

1560

1581

1561

# Timeout - property

1582

@dbus_service_property(_interface,

1583

signature="t",

1562

@dbus_service_property(_interface, signature="t",

1584

1563

access="readwrite")

1585

1564

def Timeout_dbus_property(self, value=None):

1586

1565

if value is None: # get

1599

1578

is None):

1600

1579

return

1601

1580

gobject.source_remove(self.disable_initiator_tag)

1602

self.disable_initiator_tag = gobject.timeout_add(

1603

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

1604

self.disable)

1581

self.disable_initiator_tag = (

1582

gobject.timeout_add(

1583

int((self.expires - now).total_seconds()

1584

* 1000), self.disable))

1605

1585

1606

1586

# ExtendedTimeout - property

1607

@dbus_service_property(_interface,

1608

signature="t",

1587

@dbus_service_property(_interface, signature="t",

1609

1588

access="readwrite")

1610

1589

def ExtendedTimeout_dbus_property(self, value=None):

1611

1590

if value is None: # get

1614

1593

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

1615

1594

1616

1595

# Interval - property

1617

@dbus_service_property(_interface,

1618

signature="t",

1596

@dbus_service_property(_interface, signature="t",

1619

1597

access="readwrite")

1620

1598

def Interval_dbus_property(self, value=None):

1621

1599

if value is None: # get

1626

1604

if self.enabled:

1627

1605

# Reschedule checker run

1628

1606

gobject.source_remove(self.checker_initiator_tag)

1629

self.checker_initiator_tag = gobject.timeout_add(

1630

value, self.start_checker)

1631

self.start_checker() # Start one now, too

1607

self.checker_initiator_tag = (gobject.timeout_add

1608

(value, self.start_checker))

1609

self.start_checker() # Start one now, too

1632

1610

1633

1611

# Checker - property

1634

@dbus_service_property(_interface,

1635

signature="s",

1612

@dbus_service_property(_interface, signature="s",

1636

1613

access="readwrite")

1637

1614

def Checker_dbus_property(self, value=None):

1638

1615

if value is None: # get

1640

1617

self.checker_command = str(value)

1641

1618

1642

1619

# CheckerRunning - property

1643

@dbus_service_property(_interface,

1644

signature="b",

1620

@dbus_service_property(_interface, signature="b",

1645

1621

access="readwrite")

1646

1622

def CheckerRunning_dbus_property(self, value=None):

1647

1623

if value is None: # get

1657

1633

return self.dbus_object_path # is already a dbus.ObjectPath

1658

1634

1659

1635

# Secret = property

1660

@dbus_service_property(_interface,

1661

signature="ay",

1662

access="write",

1663

byte_arrays=True)

1636

@dbus_service_property(_interface, signature="ay",

1637

access="write", byte_arrays=True)

1664

1638

def Secret_dbus_property(self, value):

1665

1639

self.secret = bytes(value)

1666

1640

1672

1646

self._pipe = child_pipe

1673

1647

self._pipe.send(('init', fpr, address))

1674

1648

if not self._pipe.recv():

1675

raise KeyError(fpr)

1649

raise KeyError()

1676

1650

1677

1651

def __getattribute__(self, name):

1678

1652

if name == '_pipe':

1682

1656

if data[0] == 'data':

1683

1657

return data[1]

1684

1658

if data[0] == 'function':

1685

1686

1659

def func(*args, **kwargs):

1687

1660

self._pipe.send(('funcall', name, args, kwargs))

1688

1661

return self._pipe.recv()[1]

1689

1690

1662

return func

1691

1663

1692

1664

def __setattr__(self, name, value):

1708

1680

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

1709

1681

self.server.child_pipe.fileno())

1710

1682

1711

session = gnutls.connection.ClientSession(

1712

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

1683

session = (gnutls.connection

1684

.ClientSession(self.request,

1685

gnutls.connection

1686

.X509Credentials()))

1713

1687

1714

1688

# Note: gnutls.connection.X509Credentials is really a

1715

1689

# generic GnuTLS certificate credentials object so long as

1724

1698

priority = self.server.gnutls_priority

1725

1699

if priority is None:

1726

1700

priority = "NORMAL"

1727

gnutls.library.functions.gnutls_priority_set_direct(

1728

session._c_object, priority, None)

1701

(gnutls.library.functions

1702

.gnutls_priority_set_direct(session._c_object,

1703

priority, None))

1729

1704

1730

1705

# Start communication using the Mandos protocol

1731

1706

# Get protocol number

1751

1726

approval_required = False

1752

1727

try:

1753

1728

try:

1754

fpr = self.fingerprint(

1755

self.peer_certificate(session))

1729

fpr = self.fingerprint(self.peer_certificate

1730

(session))

1756

1731

except (TypeError,

1757

1732

gnutls.errors.GNUTLSError) as error:

1758

1733

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

1773

1748

while True:

1774

1749

if not client.enabled:

1775

1750

logger.info("Client %s is disabled",

1776

client.name)

1751

client.name)

1777

1752

if self.server.use_dbus:

1778

1753

# Emit D-Bus signal

1779

1754

client.Rejected("Disabled")

1826

1801

logger.warning("gnutls send failed",

1827

1802

exc_info=error)

1828

1803

return

1829

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

1830

len(client.secret) - (sent_size

1831

+ sent))

1804

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

1805

sent, len(client.secret)

1806

- (sent_size + sent))

1832

1807

sent_size += sent

1833

1808

1834

1809

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

1851

1826

def peer_certificate(session):

1852

1827

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

1853

1828

# If not an OpenPGP certificate...

1854

if (gnutls.library.functions.gnutls_certificate_type_get(

1855

session._c_object)

1829

if (gnutls.library.functions

1830

.gnutls_certificate_type_get(session._c_object)

1856

1831

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1857

1832

# ...do the normal thing

1858

1833

return session.peer_certificate

1872

1847

def fingerprint(openpgp):

1873

1848

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1874

1849

# New GnuTLS "datum" with the OpenPGP public key

1875

datum = gnutls.library.types.gnutls_datum_t(

1876

ctypes.cast(ctypes.c_char_p(openpgp),

1877

ctypes.POINTER(ctypes.c_ubyte)),

1878

ctypes.c_uint(len(openpgp)))

1850

datum = (gnutls.library.types

1851

.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),

1852

ctypes.POINTER

1853

(ctypes.c_ubyte)),

1854

ctypes.c_uint(len(openpgp))))

1879

1855

# New empty GnuTLS certificate

1880

1856

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1881

gnutls.library.functions.gnutls_openpgp_crt_init(

1882

ctypes.byref(crt))

1857

(gnutls.library.functions

1858

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1883

1859

# 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)

1860

(gnutls.library.functions

1861

.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),

1862

gnutls.library.constants

1863

.GNUTLS_OPENPGP_FMT_RAW))

1887

1864

# Verify the self signature in the key

1888

1865

crtverify = ctypes.c_uint()

1889

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1890

crt, 0, ctypes.byref(crtverify))

1866

(gnutls.library.functions

1867

.gnutls_openpgp_crt_verify_self(crt, 0,

1868

ctypes.byref(crtverify)))

1891

1869

if crtverify.value != 0:

1892

1870

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1893

raise gnutls.errors.CertificateSecurityError(

1894

"Verify failed")

1871

raise (gnutls.errors.CertificateSecurityError

1872

("Verify failed"))

1895

1873

# New buffer for the fingerprint

1896

1874

buf = ctypes.create_string_buffer(20)

1897

1875

buf_len = ctypes.c_size_t()

1898

1876

# 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))

1877

(gnutls.library.functions

1878

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

1879

ctypes.byref(buf_len)))

1901

1880

# Deinit the certificate

1902

1881

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1903

1882

# Convert the buffer to a Python bytestring

1909

1888

1910

1889

class MultiprocessingMixIn(object):

1911

1890

"""Like socketserver.ThreadingMixIn, but with multiprocessing"""

1912

1913

1891

def sub_process_main(self, request, address):

1914

1892

try:

1915

1893

self.finish_request(request, address)

1927

1905

1928

1906

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1929

1907

""" adds a pipe to the MixIn """

1930

1931

1908

def process_request(self, request, client_address):

1932

1909

"""Overrides and wraps the original process_request().

1933

1910

1954

1931

interface: None or a network interface name (string)

1955

1932

use_ipv6: Boolean; to use IPv6 or not

1956

1933

"""

1957

1958

1934

def __init__(self, server_address, RequestHandlerClass,

1959

interface=None,

1960

use_ipv6=True,

1961

socketfd=None):

1935

interface=None, use_ipv6=True, socketfd=None):

1962

1936

"""If socketfd is set, use that file descriptor instead of

1963

1937

creating a new one with socket.socket().

1964

1938

"""

2005

1979

self.interface)

2006

1980

else:

2007

1981

try:

2008

self.socket.setsockopt(

2009

socket.SOL_SOCKET, SO_BINDTODEVICE,

2010

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

1982

self.socket.setsockopt(socket.SOL_SOCKET,

1983

SO_BINDTODEVICE,

1984

(self.interface + "\0")

1985

.encode("utf-8"))

2011

1986

except socket.error as error:

2012

1987

if error.errno == errno.EPERM:

2013

1988

logger.error("No permission to bind to"

2031

2006

self.server_address = (any_address,

2032

2007

self.server_address[1])

2033

2008

elif not self.server_address[1]:

2034

self.server_address = (self.server_address[0], 0)

2009

self.server_address = (self.server_address[0],

2010

0)

2035

2011

# if self.interface:

2036

2012

# self.server_address = (self.server_address[0],

2037

2013

# 0, # port

2051

2027

2052

2028

Assumes a gobject.MainLoop event loop.

2053

2029

"""

2054

2055

2030

def __init__(self, server_address, RequestHandlerClass,

2056

interface=None,

2057

use_ipv6=True,

2058

clients=None,

2059

gnutls_priority=None,

2060

use_dbus=True,

2061

socketfd=None):

2031

interface=None, use_ipv6=True, clients=None,

2032

gnutls_priority=None, use_dbus=True, socketfd=None):

2062

2033

self.enabled = False

2063

2034

self.clients = clients

2064

2035

if self.clients is None:

2070

2041

interface = interface,

2071

2042

use_ipv6 = use_ipv6,

2072

2043

socketfd = socketfd)

2073

2074

2044

def server_activate(self):

2075

2045

if self.enabled:

2076

2046

return socketserver.TCPServer.server_activate(self)

2080

2050

2081

2051

def add_pipe(self, parent_pipe, proc):

2082

2052

# Call "handle_ipc" for both data and EOF events

2083

gobject.io_add_watch(

2084

parent_pipe.fileno(),

2085

gobject.IO_IN | gobject.IO_HUP,

2086

functools.partial(self.handle_ipc,

2087

parent_pipe = parent_pipe,

2088

proc = proc))

2053

gobject.io_add_watch(parent_pipe.fileno(),

2054

gobject.IO_IN | gobject.IO_HUP,

2055

functools.partial(self.handle_ipc,

2056

parent_pipe =

2057

parent_pipe,

2058

proc = proc))

2089

2059

2090

def handle_ipc(self, source, condition,

2091

parent_pipe=None,

2092

proc = None,

2093

client_object=None):

2060

def handle_ipc(self, source, condition, parent_pipe=None,

2061

proc = None, client_object=None):

2094

2062

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

2095

2063

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

2096

2064

# Wait for other process to exit

2119

2087

parent_pipe.send(False)

2120

2088

return False

2121

2089

2122

gobject.io_add_watch(

2123

parent_pipe.fileno(),

2124

gobject.IO_IN | gobject.IO_HUP,

2125

functools.partial(self.handle_ipc,

2126

parent_pipe = parent_pipe,

2127

proc = proc,

2128

client_object = client))

2090

gobject.io_add_watch(parent_pipe.fileno(),

2091

gobject.IO_IN | gobject.IO_HUP,

2092

functools.partial(self.handle_ipc,

2093

parent_pipe =

2094

parent_pipe,

2095

proc = proc,

2096

client_object =

2097

client))

2129

2098

parent_pipe.send(True)

2130

2099

# remove the old hook in favor of the new above hook on

2131

2100

# same fileno

2137

2106

2138

2107

parent_pipe.send(('data', getattr(client_object,

2139

2108

funcname)(*args,

2140

**kwargs)))

2109

**kwargs)))

2141

2110

2142

2111

if command == 'getattr':

2143

2112

attrname = request[1]

2144

if isinstance(client_object.__getattribute__(attrname),

2145

collections.Callable):

2146

parent_pipe.send(('function', ))

2113

if callable(client_object.__getattribute__(attrname)):

2114

parent_pipe.send(('function',))

2147

2115

else:

2148

parent_pipe.send((

2149

'data', client_object.__getattribute__(attrname)))

2116

parent_pipe.send(('data', client_object

2117

.__getattribute__(attrname)))

2150

2118

2151

2119

if command == 'setattr':

2152

2120

attrname = request[1]

2183

2151

# avoid excessive use of external libraries.

2184

2152

2185

2153

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

2186

Token = collections.namedtuple("Token", (

2187

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

2188

# a "group" containing digits

2189

"value", # datetime.timedelta or None

2190

"followers")) # Tokens valid after this token

2154

Token = collections.namedtuple("Token",

2155

("regexp", # To match token; if

2156

# "value" is not None,

2157

# must have a "group"

2158

# containing digits

2159

"value", # datetime.timedelta or

2160

# None

2161

"followers")) # Tokens valid after

2162

# this token

2191

2163

# RFC 3339 "duration" tokens, syntax, and semantics; taken from

2192

2164

# the "duration" ABNF definition in RFC 3339, Appendix A.

2193

2165

token_end = Token(re.compile(r"$"), None, frozenset())

2194

2166

token_second = Token(re.compile(r"(\d+)S"),

2195

2167

datetime.timedelta(seconds=1),

2196

frozenset((token_end, )))

2168

frozenset((token_end,)))

2197

2169

token_minute = Token(re.compile(r"(\d+)M"),

2198

2170

datetime.timedelta(minutes=1),

2199

2171

frozenset((token_second, token_end)))

2215

2187

frozenset((token_month, token_end)))

2216

2188

token_week = Token(re.compile(r"(\d+)W"),

2217

2189

datetime.timedelta(weeks=1),

2218

frozenset((token_end, )))

2190

frozenset((token_end,)))

2219

2191

token_duration = Token(re.compile(r"P"), None,

2220

2192

frozenset((token_year, token_month,

2221

2193

token_day, token_time,

2223

2195

# Define starting values

2224

2196

value = datetime.timedelta() # Value so far

2225

2197

found_token = None

2226

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

2198

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

2227

2199

s = duration # String left to parse

2228

2200

# Loop until end token is found

2229

2201

while found_token is not token_end:

2246

2218

break

2247

2219

else:

2248

2220

# No currently valid tokens were found

2249

raise ValueError("Invalid RFC 3339 duration: {!r}"

2250

.format(duration))

2221

raise ValueError("Invalid RFC 3339 duration")

2251

2222

# End token found

2252

2223

return value

2253

2224

2290

2261

elif suffix == "w":

2291

2262

delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)

2292

2263

else:

2293

raise ValueError("Unknown suffix {!r}".format(suffix))

2264

raise ValueError("Unknown suffix {!r}"

2265

.format(suffix))

2294

2266

except IndexError as e:

2295

2267

raise ValueError(*(e.args))

2296

2268

timevalue += delta

2312

2284

# Close all standard open file descriptors

2313

2285

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

2314

2286

if not stat.S_ISCHR(os.fstat(null).st_mode):

2315

raise OSError(errno.ENODEV,

2316

"{} not a character device"

2287

raise OSError(errno.ENODEV, "{} not a character device"

2317

2288

.format(os.devnull))

2318

2289

os.dup2(null, sys.stdin.fileno())

2319

2290

os.dup2(null, sys.stdout.fileno())

2396

2367

"statedir": "/var/lib/mandos",

2397

2368

"foreground": "False",

2398

2369

"zeroconf": "True",

2399

}

2370

}

2400

2371

2401

2372

# Parse config file for server-global settings

2402

2373

server_config = configparser.SafeConfigParser(server_defaults)

2403

2374

del server_defaults

2404

server_config.read(os.path.join(options.configdir, "mandos.conf"))

2375

server_config.read(os.path.join(options.configdir,

2376

"mandos.conf"))

2405

2377

# Convert the SafeConfigParser object to a dict

2406

2378

server_settings = server_config.defaults()

2407

2379

# Use the appropriate methods on the non-string config options

2425

2397

# Override the settings from the config file with command line

2426

2398

# options, if set.

2427

2399

for option in ("interface", "address", "port", "debug",

2428

"priority", "servicename", "configdir", "use_dbus",

2429

"use_ipv6", "debuglevel", "restore", "statedir",

2430

"socket", "foreground", "zeroconf"):

2400

"priority", "servicename", "configdir",

2401

"use_dbus", "use_ipv6", "debuglevel", "restore",

2402

"statedir", "socket", "foreground", "zeroconf"):

2431

2403

value = getattr(options, option)

2432

2404

if value is not None:

2433

2405

server_settings[option] = value

2448

2420

2449

2421

##################################################################

2450

2422

2451

if (not server_settings["zeroconf"]

2452

and not (server_settings["port"]

2453

or server_settings["socket"] != "")):

2454

parser.error("Needs port or socket to work without Zeroconf")

2423

if (not server_settings["zeroconf"] and

2424

not (server_settings["port"]

2425

or server_settings["socket"] != "")):

2426

parser.error("Needs port or socket to work without"

2427

" Zeroconf")

2455

2428

2456

2429

# For convenience

2457

2430

debug = server_settings["debug"]

2473

2446

initlogger(debug, level)

2474

2447

2475

2448

if server_settings["servicename"] != "Mandos":

2476

syslogger.setFormatter(

2477

logging.Formatter('Mandos ({}) [%(process)d]:'

2478

' %(levelname)s: %(message)s'.format(

2479

server_settings["servicename"])))

2449

syslogger.setFormatter(logging.Formatter

2450

('Mandos ({}) [%(process)d]:'

2451

' %(levelname)s: %(message)s'

2452

.format(server_settings

2453

["servicename"])))

2480

2454

2481

2455

# Parse config file with clients

2482

2456

client_config = configparser.SafeConfigParser(Client

2490

2464

socketfd = None

2491

2465

if server_settings["socket"] != "":

2492

2466

socketfd = server_settings["socket"]

2493

tcp_server = MandosServer(

2494

(server_settings["address"], server_settings["port"]),

2495

ClientHandler,

2496

interface=(server_settings["interface"] or None),

2497

use_ipv6=use_ipv6,

2498

gnutls_priority=server_settings["priority"],

2499

use_dbus=use_dbus,

2500

socketfd=socketfd)

2467

tcp_server = MandosServer((server_settings["address"],

2468

server_settings["port"]),

2469

ClientHandler,

2470

interface=(server_settings["interface"]

2471

or None),

2472

use_ipv6=use_ipv6,

2473

gnutls_priority=

2474

server_settings["priority"],

2475

use_dbus=use_dbus,

2476

socketfd=socketfd)

2501

2477

if not foreground:

2502

2478

pidfilename = "/run/mandos.pid"

2503

2479

if not os.path.isdir("/run/."):

2504

2480

pidfilename = "/var/run/mandos.pid"

2505

2481

pidfile = None

2506

2482

try:

2507

pidfile = codecs.open(pidfilename, "w", encoding="utf-8")

2483

pidfile = open(pidfilename, "w")

2508

2484

except IOError as e:

2509

2485

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

2510

2486

exc_info=e)

2537

2513

def debug_gnutls(level, string):

2538

2514

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

2539

2515

2540

gnutls.library.functions.gnutls_global_set_log_function(

2541

debug_gnutls)

2516

(gnutls.library.functions

2517

.gnutls_global_set_log_function(debug_gnutls))

2542

2518

2543

2519

# Redirect stdin so all checkers get /dev/null

2544

2520

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

2564

2540

if use_dbus:

2565

2541

try:

2566

2542

bus_name = dbus.service.BusName("se.recompile.Mandos",

2567

bus,

2568

do_not_queue=True)

2569

old_bus_name = dbus.service.BusName(

2570

"se.bsnet.fukt.Mandos", bus,

2571

do_not_queue=True)

2572

except dbus.exceptions.DBusException as e:

2543

bus, do_not_queue=True)

2544

old_bus_name = (dbus.service.BusName

2545

("se.bsnet.fukt.Mandos", bus,

2546

do_not_queue=True))

2547

except dbus.exceptions.NameExistsException as e:

2573

2548

logger.error("Disabling D-Bus:", exc_info=e)

2574

2549

use_dbus = False

2575

2550

server_settings["use_dbus"] = False

2576

2551

tcp_server.use_dbus = False

2577

2552

if zeroconf:

2578

2553

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2579

service = AvahiServiceToSyslog(

2580

name = server_settings["servicename"],

2581

servicetype = "_mandos._tcp",

2582

protocol = protocol,

2583

bus = bus)

2554

service = AvahiServiceToSyslog(name =

2555

server_settings["servicename"],

2556

servicetype = "_mandos._tcp",

2557

protocol = protocol, bus = bus)

2584

2558

if server_settings["interface"]:

2585

service.interface = if_nametoindex(

2586

server_settings["interface"].encode("utf-8"))

2559

service.interface = (if_nametoindex

2560

(server_settings["interface"]

2561

.encode("utf-8")))

2587

2562

2588

2563

global multiprocessing_manager

2589

2564

multiprocessing_manager = multiprocessing.Manager()

2608

2583

if server_settings["restore"]:

2609

2584

try:

2610

2585

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

2611

clients_data, old_client_settings = pickle.load(

2612

stored_state)

2586

clients_data, old_client_settings = (pickle.load

2587

(stored_state))

2613

2588

os.remove(stored_state_path)

2614

2589

except IOError as e:

2615

2590

if e.errno == errno.ENOENT:

2616

logger.warning("Could not load persistent state:"

2617

" {}".format(os.strerror(e.errno)))

2591

logger.warning("Could not load persistent state: {}"

2592

.format(os.strerror(e.errno)))

2618

2593

else:

2619

2594

logger.critical("Could not load persistent state:",

2620

2595

exc_info=e)

2621

2596

raise

2622

2597

except EOFError as e:

2623

2598

logger.warning("Could not load persistent state: "

2624

"EOFError:",

2625

exc_info=e)

2599

"EOFError:", exc_info=e)

2626

2600

2627

2601

with PGPEngine() as pgp:

2628

2602

for client_name, client in clients_data.items():

2640

2614

# For each value in new config, check if it

2641

2615

# differs from the old config value (Except for

2642

2616

# the "secret" attribute)

2643

if (name != "secret"

2644

and (value !=

2645

old_client_settings[client_name][name])):

2617

if (name != "secret" and

2618

value != old_client_settings[client_name]

2619

[name]):

2646

2620

client[name] = value

2647

2621

except KeyError:

2648

2622

pass

2649

2623

2650

2624

# Clients who has passed its expire date can still be

2651

# enabled if its last checker was successful. A Client

2625

# enabled if its last checker was successful. Clients

2652

2626

# whose checker succeeded before we stored its state is

2653

2627

# assumed to have successfully run all checkers during

2654

2628

# downtime.

2657

2631

if not client["last_checked_ok"]:

2658

2632

logger.warning(

2659

2633

"disabling client {} - Client never "

2660

"performed a successful checker".format(

2661

client_name))

2634

"performed a successful checker"

2635

.format(client_name))

2662

2636

client["enabled"] = False

2663

2637

elif client["last_checker_status"] != 0:

2664

2638

logger.warning(

2665

2639

"disabling client {} - Client last"

2666

" checker failed with error code"

2667

" {}".format(

2668

client_name,

2669

client["last_checker_status"]))

2640

" checker failed with error code {}"

2641

.format(client_name,

2642

client["last_checker_status"]))

2670

2643

client["enabled"] = False

2671

2644

else:

2672

client["expires"] = (

2673

datetime.datetime.utcnow()

2674

+ client["timeout"])

2645

client["expires"] = (datetime.datetime

2646

.utcnow()

2647

+ client["timeout"])

2675

2648

logger.debug("Last checker succeeded,"

2676

" keeping {} enabled".format(

2677

client_name))

2649

" keeping {} enabled"

2650

.format(client_name))

2678

2651

try:

2679

client["secret"] = pgp.decrypt(

2680

client["encrypted_secret"],

2681

client_settings[client_name]["secret"])

2652

client["secret"] = (

2653

pgp.decrypt(client["encrypted_secret"],

2654

client_settings[client_name]

2655

["secret"]))

2682

2656

except PGPError:

2683

2657

# If decryption fails, we use secret from new settings

2684

logger.debug("Failed to decrypt {} old secret".format(

2685

client_name))

2686

client["secret"] = (client_settings[client_name]

2687

["secret"])

2658

logger.debug("Failed to decrypt {} old secret"

2659

.format(client_name))

2660

client["secret"] = (

2661

client_settings[client_name]["secret"])

2688

2662

2689

2663

# Add/remove clients based on new changes made to config

2690

2664

for client_name in (set(old_client_settings)

2697

2671

# Create all client objects

2698

2672

for client_name, client in clients_data.items():

2699

2673

tcp_server.clients[client_name] = client_class(

2700

name = client_name,

2701

settings = client,

2674

name = client_name, settings = client,

2702

2675

server_settings = server_settings)

2703

2676

2704

2677

if not tcp_server.clients:

2706

2679

2707

2680

if not foreground:

2708

2681

if pidfile is not None:

2709

pid = os.getpid()

2710

2682

try:

2711

2683

with pidfile:

2712

print(pid, file=pidfile)

2684

pid = os.getpid()

2685

pidfile.write("{}\n".format(pid).encode("utf-8"))

2713

2686

except IOError:

2714

2687

logger.error("Could not write to file %r with PID %d",

2715

2688

pidfilename, pid)

2720

2693

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

2721

2694

2722

2695

if use_dbus:

2723

2724

@alternate_dbus_interfaces(

2725

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

2696

@alternate_dbus_interfaces({"se.recompile.Mandos":

2697

"se.bsnet.fukt.Mandos"})

2726

2698

class MandosDBusService(DBusObjectWithProperties):

2727

2699

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

2728

2729

2700

def __init__(self):

2730

2701

dbus.service.Object.__init__(self, bus, "/")

2731

2732

2702

_interface = "se.recompile.Mandos"

2733

2703

2734

2704

@dbus_interface_annotations(_interface)

2735

2705

def _foo(self):

2736

return {

2737

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

2738

"false" }

2706

return { "org.freedesktop.DBus.Property"

2707

".EmitsChangedSignal":

2708

"false"}

2739

2709

2740

2710

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

2741

2711

def ClientAdded(self, objpath):

2755

2725

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

2756

2726

def GetAllClients(self):

2757

2727

"D-Bus method"

2758

return dbus.Array(c.dbus_object_path for c in

2728

return dbus.Array(c.dbus_object_path

2729

for c in

2759

2730

tcp_server.clients.itervalues())

2760

2731

2761

2732

@dbus.service.method(_interface,

2810

2781

# + secret.

2811

2782

exclude = { "bus", "changedstate", "secret",

2812

2783

"checker", "server_settings" }

2813

for name, typ in inspect.getmembers(dbus.service

2814

.Object):

2784

for name, typ in (inspect.getmembers

2785

(dbus.service.Object)):

2815

2786

exclude.add(name)

2816

2787

2817

2788

client_dict["encrypted_secret"] = (client

2824

2795

del client_settings[client.name]["secret"]

2825

2796

2826

2797

try:

2827

with tempfile.NamedTemporaryFile(

2828

mode='wb',

2829

suffix=".pickle",

2830

prefix='clients-',

2831

dir=os.path.dirname(stored_state_path),

2832

delete=False) as stored_state:

2798

with (tempfile.NamedTemporaryFile

2799

(mode='wb', suffix=".pickle", prefix='clients-',

2800

dir=os.path.dirname(stored_state_path),

2801

delete=False)) as stored_state:

2833

2802

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

2834

tempname = stored_state.name

2803

tempname=stored_state.name

2835

2804

os.rename(tempname, stored_state_path)

2836

2805

except (IOError, OSError) as e:

2837

2806

if not debug:

2856

2825

client.disable(quiet=True)

2857

2826

if use_dbus:

2858

2827

# Emit D-Bus signal

2859

mandos_dbus_service.ClientRemoved(

2860

client.dbus_object_path, client.name)

2828

mandos_dbus_service.ClientRemoved(client

2829

.dbus_object_path,

2830

client.name)

2861

2831

client_settings.clear()

2862

2832

2863

2833

atexit.register(cleanup)

2916

2886

# Must run before the D-Bus bus name gets deregistered

2917

2887

cleanup()

2918

2888

2919

2920

2889

if __name__ == '__main__':

2921

2890

main()