/mandos/release : revision 237.7.242

11

# "AvahiService" class, and some lines in "main".

12

#

13

# Everything else is

14

15

14

15

16

#

17

# This program is free software: you can redistribute it and/or modify

18

# it under the terms of the GNU General Public License as published by

34

from __future__ import (division, absolute_import, print_function,

35

unicode_literals)

36

37

from future_builtins import *

38

37

39

import SocketServer as socketserver

38

40

import socket

39

41

import argparse

66

68

import binascii

67

69

import tempfile

68

70

import itertools

71

import collections

69

72

70

73

import dbus

71

74

import dbus.service

76

79

import ctypes.util

77

80

import xml.dom.minidom

78

81

import inspect

79

import GnuPGInterface

80

82

81

83

try:

82

84

SO_BINDTODEVICE = socket.SO_BINDTODEVICE

86

88

except ImportError:

87

89

SO_BINDTODEVICE = None

88

90

89

version = "1.5.3"

91

version = "1.6.5"

90

92

stored_state_file = "clients.pickle"

91

93

92

94

logger = logging.getLogger()

93

syslogger = (logging.handlers.SysLogHandler

94

(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

95

address = str("/dev/log")))

95

syslogger = None

96

97

try:

98

if_nametoindex = (ctypes.cdll.LoadLibrary

114

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

115

"""init logger and add loglevel"""

116

117

syslogger = (logging.handlers.SysLogHandler

118

(facility =

119

logging.handlers.SysLogHandler.LOG_DAEMON,

120

address = str("/dev/log")))

117

121

syslogger.setFormatter(logging.Formatter

118

122

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

119

123

' %(message)s'))

137

141

class PGPEngine(object):

138

142

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

139

143

def __init__(self):

140

self.gnupg = GnuPGInterface.GnuPG()

141

144

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

142

self.gnupg = GnuPGInterface.GnuPG()

143

self.gnupg.options.meta_interactive = False

144

self.gnupg.options.homedir = self.tempdir

145

self.gnupg.options.extra_args.extend(['--force-mdc',

146

'--quiet',

147

'--no-use-agent'])

145

self.gnupgargs = ['--batch',

146

'--home', self.tempdir,

147

'--force-mdc',

148

'--quiet',

149

'--no-use-agent']

148

150

149

151

def __enter__(self):

150

152

return self

151

153

152

def __exit__ (self, exc_type, exc_value, traceback):

154

def __exit__(self, exc_type, exc_value, traceback):

153

155

self._cleanup()

154

156

return False

155

157

172

174

def password_encode(self, password):

173

175

# Passphrase can not be empty and can not contain newlines or

174

176

# NUL bytes. So we prefix it and hex encode it.

175

return b"mandos" + binascii.hexlify(password)

177

encoded = b"mandos" + binascii.hexlify(password)

178

if len(encoded) > 2048:

179

# GnuPG can't handle long passwords, so encode differently

180

encoded = (b"mandos" + password.replace(b"\\", b"\\\\")

181

.replace(b"\n", b"\\n")

182

.replace(b"\0", b"\\x00"))

183

return encoded

176

184

177

185

def encrypt(self, data, password):

178

self.gnupg.passphrase = self.password_encode(password)

179

with open(os.devnull, "w") as devnull:

180

try:

181

proc = self.gnupg.run(['--symmetric'],

182

create_fhs=['stdin', 'stdout'],

183

attach_fhs={'stderr': devnull})

184

with contextlib.closing(proc.handles['stdin']) as f:

185

f.write(data)

186

with contextlib.closing(proc.handles['stdout']) as f:

187

ciphertext = f.read()

188

proc.wait()

189

except IOError as e:

190

raise PGPError(e)

191

self.gnupg.passphrase = None

186

passphrase = self.password_encode(password)

187

with tempfile.NamedTemporaryFile(dir=self.tempdir

188

) as passfile:

189

passfile.write(passphrase)

190

passfile.flush()

191

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

192

'--passphrase-file',

193

passfile.name]

194

+ self.gnupgargs,

195

stdin = subprocess.PIPE,

196

stdout = subprocess.PIPE,

197

stderr = subprocess.PIPE)

198

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

199

if proc.returncode != 0:

200

raise PGPError(err)

192

201

return ciphertext

193

202

194

203

def decrypt(self, data, password):

195

self.gnupg.passphrase = self.password_encode(password)

196

with open(os.devnull, "w") as devnull:

197

try:

198

proc = self.gnupg.run(['--decrypt'],

199

create_fhs=['stdin', 'stdout'],

200

attach_fhs={'stderr': devnull})

201

with contextlib.closing(proc.handles['stdin']) as f:

202

f.write(data)

203

with contextlib.closing(proc.handles['stdout']) as f:

204

decrypted_plaintext = f.read()

205

proc.wait()

206

except IOError as e:

207

raise PGPError(e)

208

self.gnupg.passphrase = None

204

passphrase = self.password_encode(password)

205

with tempfile.NamedTemporaryFile(dir = self.tempdir

206

) as passfile:

207

passfile.write(passphrase)

208

passfile.flush()

209

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

210

'--passphrase-file',

211

passfile.name]

212

+ self.gnupgargs,

213

stdin = subprocess.PIPE,

214

stdout = subprocess.PIPE,

215

stderr = subprocess.PIPE)

216

decrypted_plaintext, err = proc.communicate(input

217

= data)

218

if proc.returncode != 0:

219

raise PGPError(err)

209

220

return decrypted_plaintext

210

221

211

222

212

213

223

class AvahiError(Exception):

214

224

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

215

225

self.value = value

232

242

Used to optionally bind to the specified interface.

233

243

name: string; Example: 'Mandos'

234

244

type: string; Example: '_mandos._tcp'.

235

See <http://www.dns-sd.org/ServiceTypes.html>

245

See <https://www.iana.org/assignments/service-names-port-numbers>

236

246

port: integer; what port to announce

237

247

TXT: list of strings; TXT record for the service

238

248

domain: string; Domain to publish on, default to .local if empty.

244

254

server: D-Bus Server

245

255

bus: dbus.SystemBus()

246

256

"""

257

247

258

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

248

259

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

249

260

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

262

273

self.server = None

263

274

self.bus = bus

264

275

self.entry_group_state_changed_match = None

276

265

277

def rename(self):

266

278

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

267

279

if self.rename_count >= self.max_renames:

281

293

self.cleanup()

282

294

os._exit(1)

283

295

self.rename_count += 1

296

284

297

def remove(self):

285

298

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

286

299

if self.entry_group_state_changed_match is not None:

288

301

self.entry_group_state_changed_match = None

289

302

if self.group is not None:

290

303

self.group.Reset()

304

291

305

def add(self):

292

306

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

293

307

self.remove()

310

324

dbus.UInt16(self.port),

311

325

avahi.string_array_to_txt_array(self.TXT))

312

326

self.group.Commit()

327

313

328

def entry_group_state_changed(self, state, error):

314

329

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

315

330

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

322

337

elif state == avahi.ENTRY_GROUP_FAILURE:

323

338

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

324

339

unicode(error))

325

raise AvahiGroupError("State changed: %s"

326

% unicode(error))

340

raise AvahiGroupError("State changed: {0!s}"

341

.format(error))

342

327

343

def cleanup(self):

328

344

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

329

345

if self.group is not None:

334

350

pass

335

351

self.group = None

336

352

self.remove()

353

337

354

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

338

355

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

339

356

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

358

375

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

359

376

else:

360

377

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

378

361

379

def activate(self):

362

380

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

363

381

if self.server is None:

370

388

self.server_state_changed)

371

389

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

372

390

391

373

392

class AvahiServiceToSyslog(AvahiService):

374

393

def rename(self):

375

394

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

376

395

ret = AvahiService.rename(self)

377

396

syslogger.setFormatter(logging.Formatter

378

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

379

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

380

% self.name))

397

('Mandos ({0}) [%(process)d]:'

398

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

399

.format(self.name)))

381

400

return ret

382

401

402

383

403

def timedelta_to_milliseconds(td):

384

404

"Convert a datetime.timedelta() to milliseconds"

385

405

return ((td.days * 24 * 60 * 60 * 1000)

386

406

+ (td.seconds * 1000)

387

407

+ (td.microseconds // 1000))

388

408

409

389

410

class Client(object):

390

411

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

391

412

427

448

runtime_expansions: Allowed attributes for runtime expansion.

428

449

expires: datetime.datetime(); time (UTC) when a client will be

429

450

disabled, or None

451

server_settings: The server_settings dict from main()

430

452

"""

431

453

432

454

runtime_expansions = ("approval_delay", "approval_duration",

433

"created", "enabled", "fingerprint",

434

"host", "interval", "last_checked_ok",

455

"created", "enabled", "expires",

456

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

457

"last_approval_request", "last_checked_ok",

435

458

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

436

client_defaults = { "timeout": "5m",

437

"extended_timeout": "15m",

438

"interval": "2m",

459

client_defaults = { "timeout": "PT5M",

460

"extended_timeout": "PT15M",

461

"interval": "PT2M",

439

462

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

440

463

"host": "",

441

"approval_delay": "0s",

442

"approval_duration": "1s",

464

"approval_delay": "PT0S",

465

"approval_duration": "PT1S",

443

466

"approved_by_default": "True",

444

467

"enabled": "True",

445

468

}

458

481

459

482

def approval_delay_milliseconds(self):

460

483

return timedelta_to_milliseconds(self.approval_delay)

461

484

462

485

@staticmethod

463

486

def config_parser(config):

464

487

"""Construct a new dict of client settings of this form:

489

512

"rb") as secfile:

490

513

client["secret"] = secfile.read()

491

514

else:

492

raise TypeError("No secret or secfile for section %s"

493

% section)

515

raise TypeError("No secret or secfile for section {0}"

516

.format(section))

494

517

client["timeout"] = string_to_delta(section["timeout"])

495

518

client["extended_timeout"] = string_to_delta(

496

519

section["extended_timeout"])

505

528

client["last_checker_status"] = -2

506

529

507

530

return settings

508

509

510

def __init__(self, settings, name = None):

511

"""Note: the 'checker' key in 'config' sets the

512

'checker_command' attribute and *not* the 'checker'

513

attribute."""

531

532

def __init__(self, settings, name = None, server_settings=None):

514

533

self.name = name

534

if server_settings is None:

535

server_settings = {}

536

self.server_settings = server_settings

515

537

# adding all client settings

516

538

for setting, value in settings.iteritems():

517

539

setattr(self, setting, value)

525

547

else:

526

548

self.last_enabled = None

527

549

self.expires = None

528

550

529

551

logger.debug("Creating client %r", self.name)

530

552

# Uppercase and remove spaces from fingerprint for later

531

553

# comparison purposes with return value from the fingerprint()

533

555

logger.debug(" Fingerprint: %s", self.fingerprint)

534

556

self.created = settings.get("created",

535

557

datetime.datetime.utcnow())

536

558

537

559

# attributes specific for this server instance

538

560

self.checker = None

539

561

self.checker_initiator_tag = None

567

589

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

568

590

# Already enabled

569

591

return

570

self.send_changedstate()

571

592

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

572

593

self.enabled = True

573

594

self.last_enabled = datetime.datetime.utcnow()

574

595

self.init_checker()

596

self.send_changedstate()

575

597

576

598

def disable(self, quiet=True):

577

599

"""Disable this client."""

578

600

if not getattr(self, "enabled", False):

579

601

return False

580

602

if not quiet:

581

self.send_changedstate()

582

if not quiet:

583

603

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

584

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

604

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

585

605

gobject.source_remove(self.disable_initiator_tag)

586

606

self.disable_initiator_tag = None

587

607

self.expires = None

588

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

608

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

589

609

gobject.source_remove(self.checker_initiator_tag)

590

610

self.checker_initiator_tag = None

591

611

self.stop_checker()

592

612

self.enabled = False

613

if not quiet:

614

self.send_changedstate()

593

615

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

594

616

return False

595

617

599

621

def init_checker(self):

600

622

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

601

623

# and every interval from then on.

624

if self.checker_initiator_tag is not None:

625

gobject.source_remove(self.checker_initiator_tag)

602

626

self.checker_initiator_tag = (gobject.timeout_add

603

627

(self.interval_milliseconds(),

604

628

self.start_checker))

605

629

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

630

if self.disable_initiator_tag is not None:

631

gobject.source_remove(self.disable_initiator_tag)

606

632

self.disable_initiator_tag = (gobject.timeout_add

607

633

(self.timeout_milliseconds(),

608

634

self.disable))

639

665

timeout = self.timeout

640

666

if self.disable_initiator_tag is not None:

641

667

gobject.source_remove(self.disable_initiator_tag)

668

self.disable_initiator_tag = None

642

669

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

643

670

self.disable_initiator_tag = (gobject.timeout_add

644

671

(timedelta_to_milliseconds

654

681

If a checker already exists, leave it running and do

655

682

nothing."""

656

683

# The reason for not killing a running checker is that if we

657

# did that, then if a checker (for some reason) started

658

# running slowly and taking more than 'interval' time, the

659

# client would inevitably timeout, since no checker would get

660

# a chance to run to completion. If we instead leave running

684

# did that, and if a checker (for some reason) started running

685

# slowly and taking more than 'interval' time, then the client

686

# would inevitably timeout, since no checker would get a

687

# chance to run to completion. If we instead leave running

661

688

# checkers alone, the checker would have to take more time

662

689

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

663

690

# should be.

665

692

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

666

693

try:

667

694

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

668

except (AttributeError, OSError) as error:

669

if (isinstance(error, OSError)

670

and error.errno != errno.ECHILD):

671

raise error

695

except AttributeError:

696

pass

697

except OSError as error:

698

if error.errno != errno.ECHILD:

699

raise

672

700

else:

673

701

if pid:

674

702

logger.warning("Checker was a zombie")

677

705

self.current_checker_command)

678

706

# Start a new checker if needed

679

707

if self.checker is None:

708

# Escape attributes for the shell

709

escaped_attrs = dict(

710

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

711

for attr in

712

self.runtime_expansions)

680

713

try:

681

# In case checker_command has exactly one % operator

682

command = self.checker_command % self.host

683

except TypeError:

684

# Escape attributes for the shell

685

escaped_attrs = dict(

686

(attr,

687

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

688

errors=

689

'replace')))

690

for attr in

691

self.runtime_expansions)

692

693

try:

694

command = self.checker_command % escaped_attrs

695

except TypeError as error:

696

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

697

self.checker_command, exc_info=error)

698

return True # Try again later

714

command = self.checker_command % escaped_attrs

715

except TypeError as error:

716

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

717

self.checker_command, exc_info=error)

718

return True # Try again later

699

719

self.current_checker_command = command

700

720

try:

701

721

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

704

724

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

705

725

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

706

726

# always replaced by /dev/null.)

727

# The exception is when not debugging but nevertheless

728

# running in the foreground; use the previously

729

# created wnull.

730

popen_args = {}

731

if (not self.server_settings["debug"]

732

and self.server_settings["foreground"]):

733

popen_args.update({"stdout": wnull,

734

"stderr": wnull })

707

735

self.checker = subprocess.Popen(command,

708

736

close_fds=True,

709

shell=True, cwd="/")

710

self.checker_callback_tag = (gobject.child_watch_add

711

(self.checker.pid,

712

self.checker_callback,

713

data=command))

714

# The checker may have completed before the gobject

715

# watch was added. Check for this.

716

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

717

if pid:

718

gobject.source_remove(self.checker_callback_tag)

719

self.checker_callback(pid, status, command)

737

shell=True, cwd="/",

738

**popen_args)

720

739

except OSError as error:

721

740

logger.error("Failed to start subprocess",

722

741

exc_info=error)

742

return True

743

self.checker_callback_tag = (gobject.child_watch_add

744

(self.checker.pid,

745

self.checker_callback,

746

data=command))

747

# The checker may have completed before the gobject

748

# watch was added. Check for this.

749

try:

750

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

751

except OSError as error:

752

if error.errno == errno.ECHILD:

753

# This should never happen

754

logger.error("Child process vanished",

755

exc_info=error)

756

return True

757

raise

758

if pid:

759

gobject.source_remove(self.checker_callback_tag)

760

self.checker_callback(pid, status, command)

723

761

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

724

762

return True

725

763

758

796

# "Set" method, so we fail early here:

759

797

if byte_arrays and signature != "ay":

760

798

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

761

" signature %r" % signature)

799

" signature {0!r}".format(signature))

762

800

def decorator(func):

763

801

func._dbus_is_property = True

764

802

func._dbus_interface = dbus_interface

773

811

774

812

775

813

def dbus_interface_annotations(dbus_interface):

776

"""Decorator for marking functions returning interface annotations.

814

"""Decorator for marking functions returning interface annotations

777

815

778

816

Usage:

779

817

898

936

# The byte_arrays option is not supported yet on

899

937

# signatures other than "ay".

900

938

if prop._dbus_signature != "ay":

901

raise ValueError

939

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

940

"'ay' signature {0!r}"

941

.format(prop._dbus_signature))

902

942

value = dbus.ByteArray(b''.join(chr(byte)

903

943

for byte in value))

904

944

prop(value)

976

1016

tag.appendChild(ann_tag)

977

1017

# Add interface annotation tags

978

1018

for annotation, value in dict(

979

itertools.chain(

980

*(annotations().iteritems()

981

for name, annotations in

982

self._get_all_dbus_things("interface")

983

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

984

))).iteritems():

1019

itertools.chain.from_iterable(

1020

annotations().iteritems()

1021

for name, annotations in

1022

self._get_all_dbus_things("interface")

1023

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

1024

)).iteritems():

985

1025

ann_tag = document.createElement("annotation")

986

1026

ann_tag.setAttribute("name", annotation)

987

1027

ann_tag.setAttribute("value", value)

1010

1050

return xmlstring

1011

1051

1012

1052

1013

def datetime_to_dbus (dt, variant_level=0):

1053

def datetime_to_dbus(dt, variant_level=0):

1014

1054

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

1015

1055

if dt is None:

1016

1056

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

1018

1058

variant_level=variant_level)

1019

1059

1020

1060

1021

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

1022

.__metaclass__):

1023

"""Applied to an empty subclass of a D-Bus object, this metaclass

1024

will add additional D-Bus attributes matching a certain pattern.

1061

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1062

"""A class decorator; applied to a subclass of

1063

dbus.service.Object, it will add alternate D-Bus attributes with

1064

interface names according to the "alt_interface_names" mapping.

1065

Usage:

1066

1067

@alternate_dbus_interfaces({"org.example.Interface":

1068

"net.example.AlternateInterface"})

1069

class SampleDBusObject(dbus.service.Object):

1070

@dbus.service.method("org.example.Interface")

1071

def SampleDBusMethod():

1072

pass

1073

1074

The above "SampleDBusMethod" on "SampleDBusObject" will be

1075

reachable via two interfaces: "org.example.Interface" and

1076

"net.example.AlternateInterface", the latter of which will have

1077

its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to

1078

"true", unless "deprecate" is passed with a False value.

1079

1080

This works for methods and signals, and also for D-Bus properties

1081

(from DBusObjectWithProperties) and interfaces (from the

1082

dbus_interface_annotations decorator).

1025

1083

"""

1026

def __new__(mcs, name, bases, attr):

1027

# Go through all the base classes which could have D-Bus

1028

# methods, signals, or properties in them

1029

old_interface_names = []

1030

for base in (b for b in bases

1031

if issubclass(b, dbus.service.Object)):

1032

# Go though all attributes of the base class

1033

for attrname, attribute in inspect.getmembers(base):

1084

def wrapper(cls):

1085

for orig_interface_name, alt_interface_name in (

1086

alt_interface_names.iteritems()):

1087

attr = {}

1088

interface_names = set()

1089

# Go though all attributes of the class

1090

for attrname, attribute in inspect.getmembers(cls):

1034

1091

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

1035

1092

# with the wrong interface name

1036

1093

if (not hasattr(attribute, "_dbus_interface")

1037

1094

or not attribute._dbus_interface

1038

.startswith("se.recompile.Mandos")):

1095

.startswith(orig_interface_name)):

1039

1096

continue

1040

1097

# Create an alternate D-Bus interface name based on

1041

1098

# the current name

1042

1099

alt_interface = (attribute._dbus_interface

1043

.replace("se.recompile.Mandos",

1044

"se.bsnet.fukt.Mandos"))

1045

if alt_interface != attribute._dbus_interface:

1046

old_interface_names.append(alt_interface)

1100

.replace(orig_interface_name,

1101

alt_interface_name))

1102

interface_names.add(alt_interface)

1047

1103

# Is this a D-Bus signal?

1048

1104

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

1049

# Extract the original non-method function by

1050

# black magic

1105

# Extract the original non-method undecorated

1106

# function by black magic

1051

1107

nonmethod_func = (dict(

1052

1108

zip(attribute.func_code.co_freevars,

1053

1109

attribute.__closure__))["func"]

1071

1127

except AttributeError:

1072

1128

pass

1073

1129

# Define a creator of a function to call both the

1074

# old and new functions, so both the old and new

1075

# signals gets sent when the function is called

1130

# original and alternate functions, so both the

1131

# original and alternate signals gets sent when

1132

# the function is called

1076

1133

def fixscope(func1, func2):

1077

1134

"""This function is a scope container to pass

1078

1135

func1 and func2 to the "call_both" function

1085

1142

return call_both

1086

1143

# Create the "call_both" function and add it to

1087

1144

# the class

1088

attr[attrname] = fixscope(attribute,

1089

new_function)

1145

attr[attrname] = fixscope(attribute, new_function)

1090

1146

# Is this a D-Bus method?

1091

1147

elif getattr(attribute, "_dbus_is_method", False):

1092

1148

# Create a new, but exactly alike, function

1148

1204

attribute.func_name,

1149

1205

attribute.func_defaults,

1150

1206

attribute.func_closure)))

1151

# Deprecate all old interfaces

1152

basename="_AlternateDBusNamesMetaclass_interface_annotation{0}"

1153

for old_interface_name in old_interface_names:

1154

@dbus_interface_annotations(old_interface_name)

1155

def func(self):

1156

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

1157

# Find an unused name

1158

for aname in (basename.format(i) for i in

1159

itertools.count()):

1160

if aname not in attr:

1161

attr[aname] = func

1162

break

1163

return type.__new__(mcs, name, bases, attr)

1164

1165

1207

if deprecate:

1208

# Deprecate all alternate interfaces

1209

iname="_AlternateDBusNames_interface_annotation{0}"

1210

for interface_name in interface_names:

1211

@dbus_interface_annotations(interface_name)

1212

def func(self):

1213

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

1214

"true" }

1215

# Find an unused name

1216

for aname in (iname.format(i)

1217

for i in itertools.count()):

1218

if aname not in attr:

1219

attr[aname] = func

1220

break

1221

if interface_names:

1222

# Replace the class with a new subclass of it with

1223

# methods, signals, etc. as created above.

1224

cls = type(b"{0}Alternate".format(cls.__name__),

1225

(cls,), attr)

1226

return cls

1227

return wrapper

1228

1229

1230

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

1231

"se.bsnet.fukt.Mandos"})

1166

1232

class ClientDBus(Client, DBusObjectWithProperties):

1167

1233

"""A Client class using D-Bus

1168

1234

1188

1254

("/clients/" + client_object_name))

1189

1255

DBusObjectWithProperties.__init__(self, self.bus,

1190

1256

self.dbus_object_path)

1191

1257

1192

1258

def notifychangeproperty(transform_func,

1193

1259

dbus_name, type_func=lambda x: x,

1194

1260

variant_level=1):

1217

1283

1218

1284

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

1219

1285

1220

1221

1286

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1222

1287

approvals_pending = notifychangeproperty(dbus.Boolean,

1223

1288

"ApprovalPending",

1287

1352

*args, **kwargs)

1288

1353

1289

1354

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

1290

old_checker = self.checker

1291

if self.checker is not None:

1292

old_checker_pid = self.checker.pid

1293

else:

1294

old_checker_pid = None

1355

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

1295

1356

r = Client.start_checker(self, *args, **kwargs)

1296

1357

# Only if new checker process was started

1297

1358

if (self.checker is not None

1305

1366

return False

1306

1367

1307

1368

def approve(self, value=True):

1308

self.send_changedstate()

1309

1369

self.approved = value

1310

1370

gobject.timeout_add(timedelta_to_milliseconds

1311

1371

(self.approval_duration),

1312

1372

self._reset_approved)

1313

1373

self.send_changedstate()

1314

1374

1315

1375

## D-Bus methods, signals & properties

1316

1376

_interface = "se.recompile.Mandos.Client"

1500

1560

def Timeout_dbus_property(self, value=None):

1501

1561

if value is None: # get

1502

1562

return dbus.UInt64(self.timeout_milliseconds())

1563

old_timeout = self.timeout

1503

1564

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

1504

# Reschedule timeout

1565

# Reschedule disabling

1505

1566

if self.enabled:

1506

1567

now = datetime.datetime.utcnow()

1507

time_to_die = timedelta_to_milliseconds(

1508

(self.last_checked_ok + self.timeout) - now)

1509

if time_to_die <= 0:

1568

self.expires += self.timeout - old_timeout

1569

if self.expires <= now:

1510

1570

# The timeout has passed

1511

1571

self.disable()

1512

1572

else:

1513

self.expires = (now +

1514

datetime.timedelta(milliseconds =

1515

time_to_die))

1516

1573

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

1517

1574

is None):

1518

1575

return

1519

1576

gobject.source_remove(self.disable_initiator_tag)

1520

self.disable_initiator_tag = (gobject.timeout_add

1521

(time_to_die,

1522

self.disable))

1577

self.disable_initiator_tag = (

1578

gobject.timeout_add(

1579

timedelta_to_milliseconds(self.expires - now),

1580

self.disable))

1523

1581

1524

1582

# ExtendedTimeout - property

1525

1583

@dbus_service_property(_interface, signature="t",

1604

1662

self._pipe.send(('setattr', name, value))

1605

1663

1606

1664

1607

class ClientDBusTransitional(ClientDBus):

1608

__metaclass__ = AlternateDBusNamesMetaclass

1609

1610

1611

1665

class ClientHandler(socketserver.BaseRequestHandler, object):

1612

1666

"""A class to handle client connections.

1613

1667

1649

1703

logger.debug("Protocol version: %r", line)

1650

1704

try:

1651

1705

if int(line.strip().split()[0]) > 1:

1652

raise RuntimeError

1706

raise RuntimeError(line)

1653

1707

except (ValueError, IndexError, RuntimeError) as error:

1654

1708

logger.error("Unknown protocol version: %s", error)

1655

1709

return

1717

1771

#wait until timeout or approved

1718

1772

time = datetime.datetime.now()

1719

1773

client.changedstate.acquire()

1720

(client.changedstate.wait

1721

(float(client.timedelta_to_milliseconds(delay)

1722

/ 1000)))

1774

client.changedstate.wait(

1775

float(timedelta_to_milliseconds(delay)

1776

/ 1000))

1723

1777

client.changedstate.release()

1724

1778

time2 = datetime.datetime.now()

1725

1779

if (time2 - time) >= delay:

1741

1795

try:

1742

1796

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

1743

1797

except gnutls.errors.GNUTLSError as error:

1744

logger.warning("gnutls send failed")

1798

logger.warning("gnutls send failed",

1799

exc_info=error)

1745

1800

return

1746

1801

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

1747

1802

sent, len(client.secret)

1761

1816

try:

1762

1817

session.bye()

1763

1818

except gnutls.errors.GNUTLSError as error:

1764

logger.warning("GnuTLS bye failed")

1819

logger.warning("GnuTLS bye failed",

1820

exc_info=error)

1765

1821

1766

1822

@staticmethod

1767

1823

def peer_certificate(session):

1839

1895

def process_request(self, request, address):

1840

1896

"""Start a new process to process the request."""

1841

1897

proc = multiprocessing.Process(target = self.sub_process_main,

1842

args = (request,

1843

address))

1898

args = (request, address))

1844

1899

proc.start()

1845

1900

return proc

1846

1901

1861

1916

1862

1917

def add_pipe(self, parent_pipe, proc):

1863

1918

"""Dummy function; override as necessary"""

1864

raise NotImplementedError

1919

raise NotImplementedError()

1865

1920

1866

1921

1867

1922

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1874

1929

use_ipv6: Boolean; to use IPv6 or not

1875

1930

"""

1876

1931

def __init__(self, server_address, RequestHandlerClass,

1877

interface=None, use_ipv6=True):

1932

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

1933

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

1934

creating a new one with socket.socket().

1935

"""

1878

1936

self.interface = interface

1879

1937

if use_ipv6:

1880

1938

self.address_family = socket.AF_INET6

1939

if socketfd is not None:

1940

# Save the file descriptor

1941

self.socketfd = socketfd

1942

# Save the original socket.socket() function

1943

self.socket_socket = socket.socket

1944

# To implement --socket, we monkey patch socket.socket.

1945

#

1946

# (When socketserver.TCPServer is a new-style class, we

1947

# could make self.socket into a property instead of monkey

1948

# patching socket.socket.)

1949

#

1950

# Create a one-time-only replacement for socket.socket()

1951

@functools.wraps(socket.socket)

1952

def socket_wrapper(*args, **kwargs):

1953

# Restore original function so subsequent calls are

1954

# not affected.

1955

socket.socket = self.socket_socket

1956

del self.socket_socket

1957

# This time only, return a new socket object from the

1958

# saved file descriptor.

1959

return socket.fromfd(self.socketfd, *args, **kwargs)

1960

# Replace socket.socket() function with wrapper

1961

socket.socket = socket_wrapper

1962

# The socketserver.TCPServer.__init__ will call

1963

# socket.socket(), which might be our replacement,

1964

# socket_wrapper(), if socketfd was set.

1881

1965

socketserver.TCPServer.__init__(self, server_address,

1882

1966

RequestHandlerClass)

1967

1883

1968

def server_bind(self):

1884

1969

"""This overrides the normal server_bind() function

1885

1970

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

1893

1978

try:

1894

1979

self.socket.setsockopt(socket.SOL_SOCKET,

1895

1980

SO_BINDTODEVICE,

1896

str(self.interface

1897

+ '\0'))

1981

str(self.interface + '\0'))

1898

1982

except socket.error as error:

1899

if error[0] == errno.EPERM:

1900

logger.error("No permission to"

1901

" bind to interface %s",

1902

self.interface)

1903

elif error[0] == errno.ENOPROTOOPT:

1983

if error.errno == errno.EPERM:

1984

logger.error("No permission to bind to"

1985

" interface %s", self.interface)

1986

elif error.errno == errno.ENOPROTOOPT:

1904

1987

logger.error("SO_BINDTODEVICE not available;"

1905

1988

" cannot bind to interface %s",

1906

1989

self.interface)

1990

elif error.errno == errno.ENODEV:

1991

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

1992

" cannot bind", self.interface)

1907

1993

else:

1908

1994

raise

1909

1995

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

1912

1998

if self.address_family == socket.AF_INET6:

1913

1999

any_address = "::" # in6addr_any

1914

2000

else:

1915

any_address = socket.INADDR_ANY

2001

any_address = "0.0.0.0" # INADDR_ANY

1916

2002

self.server_address = (any_address,

1917

2003

self.server_address[1])

1918

2004

elif not self.server_address[1]:

1939

2025

"""

1940

2026

def __init__(self, server_address, RequestHandlerClass,

1941

2027

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

1942

gnutls_priority=None, use_dbus=True):

2028

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

1943

2029

self.enabled = False

1944

2030

self.clients = clients

1945

2031

if self.clients is None:

1949

2035

IPv6_TCPServer.__init__(self, server_address,

1950

2036

RequestHandlerClass,

1951

2037

interface = interface,

1952

use_ipv6 = use_ipv6)

2038

use_ipv6 = use_ipv6,

2039

socketfd = socketfd)

1953

2040

def server_activate(self):

1954

2041

if self.enabled:

1955

2042

return socketserver.TCPServer.server_activate(self)

1968

2055

1969

2056

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

1970

2057

proc = None, client_object=None):

1971

condition_names = {

1972

gobject.IO_IN: "IN", # There is data to read.

1973

gobject.IO_OUT: "OUT", # Data can be written (without

1974

# blocking).

1975

gobject.IO_PRI: "PRI", # There is urgent data to read.

1976

gobject.IO_ERR: "ERR", # Error condition.

1977

gobject.IO_HUP: "HUP" # Hung up (the connection has been

1978

# broken, usually for pipes and

1979

# sockets).

1980

}

1981

conditions_string = ' | '.join(name

1982

for cond, name in

1983

condition_names.iteritems()

1984

if cond & condition)

1985

2058

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

1986

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

2059

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

1987

2060

# Wait for other process to exit

1988

2061

proc.join()

1989

2062

return False

2047

2120

return True

2048

2121

2049

2122

2123

def rfc3339_duration_to_delta(duration):

2124

"""Parse an RFC 3339 "duration" and return a datetime.timedelta

2125

2126

>>> rfc3339_duration_to_delta("P7D")

2127

datetime.timedelta(7)

2128

>>> rfc3339_duration_to_delta("PT60S")

2129

datetime.timedelta(0, 60)

2130

>>> rfc3339_duration_to_delta("PT60M")

2131

datetime.timedelta(0, 3600)

2132

>>> rfc3339_duration_to_delta("PT24H")

2133

datetime.timedelta(1)

2134

>>> rfc3339_duration_to_delta("P1W")

2135

datetime.timedelta(7)

2136

>>> rfc3339_duration_to_delta("PT5M30S")

2137

datetime.timedelta(0, 330)

2138

>>> rfc3339_duration_to_delta("P1DT3M20S")

2139

datetime.timedelta(1, 200)

2140

"""

2141

2142

# Parsing an RFC 3339 duration with regular expressions is not

2143

# possible - there would have to be multiple places for the same

2144

# values, like seconds. The current code, while more esoteric, is

2145

# cleaner without depending on a parsing library. If Python had a

2146

# built-in library for parsing we would use it, but we'd like to

2147

# avoid excessive use of external libraries.

2148

2149

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

2150

Token = collections.namedtuple("Token",

2151

("regexp", # To match token; if

2152

# "value" is not None,

2153

# must have a "group"

2154

# containing digits

2155

"value", # datetime.timedelta or

2156

# None

2157

"followers")) # Tokens valid after

2158

# this token

2159

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

2160

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

2161

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

2162

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

2163

datetime.timedelta(seconds=1),

2164

frozenset((token_end,)))

2165

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

2166

datetime.timedelta(minutes=1),

2167

frozenset((token_second, token_end)))

2168

token_hour = Token(re.compile(r"(\d+)H"),

2169

datetime.timedelta(hours=1),

2170

frozenset((token_minute, token_end)))

2171

token_time = Token(re.compile(r"T"),

2172

None,

2173

frozenset((token_hour, token_minute,

2174

token_second)))

2175

token_day = Token(re.compile(r"(\d+)D"),

2176

datetime.timedelta(days=1),

2177

frozenset((token_time, token_end)))

2178

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

2179

datetime.timedelta(weeks=4),

2180

frozenset((token_day, token_end)))

2181

token_year = Token(re.compile(r"(\d+)Y"),

2182

datetime.timedelta(weeks=52),

2183

frozenset((token_month, token_end)))

2184

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

2185

datetime.timedelta(weeks=1),

2186

frozenset((token_end,)))

2187

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

2188

frozenset((token_year, token_month,

2189

token_day, token_time,

2190

token_week))),

2191

# Define starting values

2192

value = datetime.timedelta() # Value so far

2193

found_token = None

2194

followers = frozenset(token_duration,) # Following valid tokens

2195

s = duration # String left to parse

2196

# Loop until end token is found

2197

while found_token is not token_end:

2198

# Search for any currently valid tokens

2199

for token in followers:

2200

match = token.regexp.match(s)

2201

if match is not None:

2202

# Token found

2203

if token.value is not None:

2204

# Value found, parse digits

2205

factor = int(match.group(1), 10)

2206

# Add to value so far

2207

value += factor * token.value

2208

# Strip token from string

2209

s = token.regexp.sub("", s, 1)

2210

# Go to found token

2211

found_token = token

2212

# Set valid next tokens

2213

followers = found_token.followers

2214

break

2215

else:

2216

# No currently valid tokens were found

2217

raise ValueError("Invalid RFC 3339 duration")

2218

# End token found

2219

return value

2220

2221

2050

2222

def string_to_delta(interval):

2051

2223

"""Parse a string and return a datetime.timedelta

2052

2224

2063

2235

>>> string_to_delta('5m 30s')

2064

2236

datetime.timedelta(0, 330)

2065

2237

"""

2238

2239

try:

2240

return rfc3339_duration_to_delta(interval)

2241

except ValueError:

2242

pass

2243

2066

2244

timevalue = datetime.timedelta(0)

2067

2245

for s in interval.split():

2068

2246

try:

2079

2257

elif suffix == "w":

2080

2258

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

2081

2259

else:

2082

raise ValueError("Unknown suffix %r" % suffix)

2083

except (ValueError, IndexError) as e:

2260

raise ValueError("Unknown suffix {0!r}"

2261

.format(suffix))

2262

except IndexError as e:

2084

2263

raise ValueError(*(e.args))

2085

2264

timevalue += delta

2086

2265

return timevalue

2102

2281

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

2103

2282

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

2104

2283

raise OSError(errno.ENODEV,

2105

"%s not a character device"

2106

% os.devnull)

2284

"{0} not a character device"

2285

.format(os.devnull))

2107

2286

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

2108

2287

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

2109

2288

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

2118

2297

2119

2298

parser = argparse.ArgumentParser()

2120

2299

parser.add_argument("-v", "--version", action="version",

2121

version = "%%(prog)s %s" % version,

2300

version = "%(prog)s {0}".format(version),

2122

2301

help="show version number and exit")

2123

2302

parser.add_argument("-i", "--interface", metavar="IF",

2124

2303

help="Bind to interface IF")

2130

2309

help="Run self-test")

2131

2310

parser.add_argument("--debug", action="store_true",

2132

2311

help="Debug mode; run in foreground and log"

2133

" to terminal")

2312

" to terminal", default=None)

2134

2313

parser.add_argument("--debuglevel", metavar="LEVEL",

2135

2314

help="Debug level for stdout output")

2136

2315

parser.add_argument("--priority", help="GnuTLS"

2143

2322

" files")

2144

2323

parser.add_argument("--no-dbus", action="store_false",

2145

2324

dest="use_dbus", help="Do not provide D-Bus"

2146

" system bus interface")

2325

" system bus interface", default=None)

2147

2326

parser.add_argument("--no-ipv6", action="store_false",

2148

dest="use_ipv6", help="Do not use IPv6")

2327

dest="use_ipv6", help="Do not use IPv6",

2328

default=None)

2149

2329

parser.add_argument("--no-restore", action="store_false",

2150

2330

dest="restore", help="Do not restore stored"

2151

" state")

2331

" state", default=None)

2332

parser.add_argument("--socket", type=int,

2333

help="Specify a file descriptor to a network"

2334

" socket to use instead of creating one")

2152

2335

parser.add_argument("--statedir", metavar="DIR",

2153

2336

help="Directory to save/restore state in")

2337

parser.add_argument("--foreground", action="store_true",

2338

help="Run in foreground", default=None)

2154

2339

2155

2340

options = parser.parse_args()

2156

2341

2157

2342

if options.check:

2158

2343

import doctest

2159

doctest.testmod()

2160

sys.exit()

2344

fail_count, test_count = doctest.testmod()

2345

sys.exit(os.EX_OK if fail_count == 0 else 1)

2161

2346

2162

2347

# Default values for config file for server-global settings

2163

2348

server_defaults = { "interface": "",

2165

2350

"port": "",

2166

2351

"debug": "False",

2167

2352

"priority":

2168

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

2353

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

2169

2354

"servicename": "Mandos",

2170

2355

"use_dbus": "True",

2171

2356

"use_ipv6": "True",

2172

2357

"debuglevel": "",

2173

2358

"restore": "True",

2174

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

2359

"socket": "",

2360

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

2361

"foreground": "False",

2175

2362

}

2176

2363

2177

2364

# Parse config file for server-global settings

2182

2369

# Convert the SafeConfigParser object to a dict

2183

2370

server_settings = server_config.defaults()

2184

2371

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

2185

for option in ("debug", "use_dbus", "use_ipv6"):

2372

for option in ("debug", "use_dbus", "use_ipv6", "foreground"):

2186

2373

server_settings[option] = server_config.getboolean("DEFAULT",

2187

2374

option)

2188

2375

if server_settings["port"]:

2189

2376

server_settings["port"] = server_config.getint("DEFAULT",

2190

2377

"port")

2378

if server_settings["socket"]:

2379

server_settings["socket"] = server_config.getint("DEFAULT",

2380

"socket")

2381

# Later, stdin will, and stdout and stderr might, be dup'ed

2382

# over with an opened os.devnull. But we don't want this to

2383

# happen with a supplied network socket.

2384

if 0 <= server_settings["socket"] <= 2:

2385

server_settings["socket"] = os.dup(server_settings

2386

["socket"])

2191

2387

del server_config

2192

2388

2193

2389

# Override the settings from the config file with command line

2195

2391

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

2196

2392

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

2197

2393

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

2198

"statedir"):

2394

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

2199

2395

value = getattr(options, option)

2200

2396

if value is not None:

2201

2397

server_settings[option] = value

2204

2400

for option in server_settings.keys():

2205

2401

if type(server_settings[option]) is str:

2206

2402

server_settings[option] = unicode(server_settings[option])

2403

# Force all boolean options to be boolean

2404

for option in ("debug", "use_dbus", "use_ipv6", "restore",

2405

"foreground"):

2406

server_settings[option] = bool(server_settings[option])

2407

# Debug implies foreground

2408

if server_settings["debug"]:

2409

server_settings["foreground"] = True

2207

2410

# Now we have our good server settings in "server_settings"

2208

2411

2209

2412

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

2215

2418

use_ipv6 = server_settings["use_ipv6"]

2216

2419

stored_state_path = os.path.join(server_settings["statedir"],

2217

2420

stored_state_file)

2421

foreground = server_settings["foreground"]

2218

2422

2219

2423

if debug:

2220

2424

initlogger(debug, logging.DEBUG)

2227

2431

2228

2432

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

2229

2433

syslogger.setFormatter(logging.Formatter

2230

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

2231

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

2232

% server_settings["servicename"]))

2434

('Mandos ({0}) [%(process)d]:'

2435

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

2436

.format(server_settings

2437

["servicename"])))

2233

2438

2234

2439

# Parse config file with clients

2235

2440

client_config = configparser.SafeConfigParser(Client

2248

2453

use_ipv6=use_ipv6,

2249

2454

gnutls_priority=

2250

2455

server_settings["priority"],

2251

use_dbus=use_dbus)

2252

if not debug:

2253

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

2456

use_dbus=use_dbus,

2457

socketfd=(server_settings["socket"]

2458

or None))

2459

if not foreground:

2460

pidfilename = "/run/mandos.pid"

2461

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

2462

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

2463

pidfile = None

2254

2464

try:

2255

2465

pidfile = open(pidfilename, "w")

2256

except IOError:

2257

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

2466

except IOError as e:

2467

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

2468

exc_info=e)

2258

2469

2259

try:

2260

uid = pwd.getpwnam("_mandos").pw_uid

2261

gid = pwd.getpwnam("_mandos").pw_gid

2262

except KeyError:

2470

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

2263

2471

try:

2264

uid = pwd.getpwnam("mandos").pw_uid

2265

gid = pwd.getpwnam("mandos").pw_gid

2472

uid = pwd.getpwnam(name).pw_uid

2473

gid = pwd.getpwnam(name).pw_gid

2474

break

2266

2475

except KeyError:

2267

try:

2268

uid = pwd.getpwnam("nobody").pw_uid

2269

gid = pwd.getpwnam("nobody").pw_gid

2270

except KeyError:

2271

uid = 65534

2272

gid = 65534

2476

continue

2477

else:

2478

uid = 65534

2479

gid = 65534

2273

2480

try:

2274

2481

os.setgid(gid)

2275

2482

os.setuid(uid)

2276

2483

except OSError as error:

2277

if error[0] != errno.EPERM:

2278

raise error

2484

if error.errno != errno.EPERM:

2485

raise

2279

2486

2280

2487

if debug:

2281

2488

# Enable all possible GnuTLS debugging

2298

2505

os.close(null)

2299

2506

2300

2507

# Need to fork before connecting to D-Bus

2301

if not debug:

2508

if not foreground:

2302

2509

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

2303

2510

daemon()

2304

2511

2512

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

2513

# need to inform gobject that threads will be used.

2305

2514

gobject.threads_init()

2306

2515

2307

2516

global main_loop

2318

2527

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

2319

2528

do_not_queue=True))

2320

2529

except dbus.exceptions.NameExistsException as e:

2321

logger.error(unicode(e) + ", disabling D-Bus")

2530

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

2322

2531

use_dbus = False

2323

2532

server_settings["use_dbus"] = False

2324

2533

tcp_server.use_dbus = False

2336

2545

2337

2546

client_class = Client

2338

2547

if use_dbus:

2339

client_class = functools.partial(ClientDBusTransitional,

2340

bus = bus)

2548

client_class = functools.partial(ClientDBus, bus = bus)

2341

2549

2342

2550

client_settings = Client.config_parser(client_config)

2343

2551

old_client_settings = {}

2344

2552

clients_data = {}

2345

2553

2554

# This is used to redirect stdout and stderr for checker processes

2555

global wnull

2556

wnull = open(os.devnull, "w") # A writable /dev/null

2557

# Only used if server is running in foreground but not in debug

2558

# mode

2559

if debug or not foreground:

2560

wnull.close()

2561

2346

2562

# Get client data and settings from last running state.

2347

2563

if server_settings["restore"]:

2348

2564

try:

2351

2567

(stored_state))

2352

2568

os.remove(stored_state_path)

2353

2569

except IOError as e:

2354

logger.warning("Could not load persistent state: {0}"

2355

.format(e))

2356

if e.errno != errno.ENOENT:

2570

if e.errno == errno.ENOENT:

2571

logger.warning("Could not load persistent state: {0}"

2572

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

2573

else:

2574

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

2575

exc_info=e)

2357

2576

raise

2358

2577

except EOFError as e:

2359

2578

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

2360

"EOFError: {0}".format(e))

2579

"EOFError:", exc_info=e)

2361

2580

2362

2581

with PGPEngine() as pgp:

2363

2582

for client_name, client in clients_data.iteritems():

2583

# Skip removed clients

2584

if client_name not in client_settings:

2585

continue

2586

2364

2587

# Decide which value to use after restoring saved state.

2365

2588

# We have three different values: Old config file,

2366

2589

# new config file, and saved state.

2416

2639

.format(client_name))

2417

2640

client["secret"] = (

2418

2641

client_settings[client_name]["secret"])

2419

2420

2642

2421

2643

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

2422

2644

for client_name in (set(old_client_settings)

2425

2647

for client_name in (set(client_settings)

2426

2648

- set(old_client_settings)):

2427

2649

clients_data[client_name] = client_settings[client_name]

2428

2650

2429

2651

# Create all client objects

2430

2652

for client_name, client in clients_data.iteritems():

2431

2653

tcp_server.clients[client_name] = client_class(

2432

name = client_name, settings = client)

2654

name = client_name, settings = client,

2655

server_settings = server_settings)

2433

2656

2434

2657

if not tcp_server.clients:

2435

2658

logger.warning("No clients defined")

2436

2437

if not debug:

2438

try:

2439

with pidfile:

2440

pid = os.getpid()

2441

pidfile.write(str(pid) + "\n".encode("utf-8"))

2442

del pidfile

2443

except IOError:

2444

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

2445

pidfilename, pid)

2446

except NameError:

2447

# "pidfile" was never created

2448

pass

2659

2660

if not foreground:

2661

if pidfile is not None:

2662

try:

2663

with pidfile:

2664

pid = os.getpid()

2665

pidfile.write(str(pid) + "\n".encode("utf-8"))

2666

except IOError:

2667

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

2668

pidfilename, pid)

2669

del pidfile

2449

2670

del pidfilename

2450

signal.signal(signal.SIGINT, signal.SIG_IGN)

2451

2671

2452

2672

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

2453

2673

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

2454

2674

2455

2675

if use_dbus:

2676

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

2677

"se.bsnet.fukt.Mandos"})

2456

2678

class MandosDBusService(DBusObjectWithProperties):

2457

2679

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

2458

2680

def __init__(self):

2512

2734

2513

2735

del _interface

2514

2736

2515

class MandosDBusServiceTransitional(MandosDBusService):

2516

__metaclass__ = AlternateDBusNamesMetaclass

2517

mandos_dbus_service = MandosDBusServiceTransitional()

2737

mandos_dbus_service = MandosDBusService()

2518

2738

2519

2739

def cleanup():

2520

2740

"Cleanup function; run on exit"

2521

2741

service.cleanup()

2522

2742

2523

2743

multiprocessing.active_children()

2744

wnull.close()

2524

2745

if not (tcp_server.clients or client_settings):

2525

2746

return

2526

2747

2538

2759

# A list of attributes that can not be pickled

2539

2760

# + secret.

2540

2761

exclude = set(("bus", "changedstate", "secret",

2541

"checker"))

2762

"checker", "server_settings"))

2542

2763

for name, typ in (inspect.getmembers

2543

2764

(dbus.service.Object)):

2544

2765

exclude.add(name)

2553

2774

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

2554

2775

2555

2776

try:

2556

tempfd, tempname = tempfile.mkstemp(suffix=".pickle",

2557

prefix="clients-",

2558

dir=os.path.dirname

2559

(stored_state_path))

2560

with os.fdopen(tempfd, "wb") as stored_state:

2777

with (tempfile.NamedTemporaryFile

2778

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

2779

dir=os.path.dirname(stored_state_path),

2780

delete=False)) as stored_state:

2561

2781

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

2782

tempname=stored_state.name

2562

2783

os.rename(tempname, stored_state_path)

2563

2784

except (IOError, OSError) as e:

2564

logger.warning("Could not save persistent state: {0}"

2565

.format(e))

2566

2785

if not debug:

2567

2786

try:

2568

2787

os.remove(tempname)

2569

2788

except NameError:

2570

2789

pass

2571

if e.errno not in set((errno.ENOENT, errno.EACCES,

2572

errno.EEXIST)):

2573

raise e

2790

if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):

2791

logger.warning("Could not save persistent state: {0}"

2792

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

2793

else:

2794

logger.warning("Could not save persistent state:",

2795

exc_info=e)

2796

raise

2574

2797

2575

2798

# Delete all clients, and settings from config

2576

2799

while tcp_server.clients:

2603

2826

service.port = tcp_server.socket.getsockname()[1]

2604

2827

if use_ipv6:

2605

2828

logger.info("Now listening on address %r, port %d,"

2606

" flowinfo %d, scope_id %d"

2607

% tcp_server.socket.getsockname())

2829

" flowinfo %d, scope_id %d",

2830

*tcp_server.socket.getsockname())

2608

2831

else: # IPv4

2609

logger.info("Now listening on address %r, port %d"

2610

% tcp_server.socket.getsockname())

2832

logger.info("Now listening on address %r, port %d",

2833

*tcp_server.socket.getsockname())

2611

2834

2612

2835

#service.interface = tcp_server.socket.getsockname()[3]

2613

2836