/mandos/trunk : revision 237.6.2

1

#!/usr/bin/python2.7

1

#!/usr/bin/python

2

# -*- mode: python; coding: utf-8 -*-

3

#

4

# Mandos server - give out binary blobs to connecting clients.

11

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

12

#

13

# Everything else is

14

15

14

15

16

#

17

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

18

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

34

from __future__ import (division, absolute_import, print_function,

35

unicode_literals)

36

37

from future_builtins import *

38

39

37

import SocketServer as socketserver

40

38

import socket

41

39

import argparse

67

65

import types

68

66

import binascii

69

67

import tempfile

70

import itertools

71

import collections

72

68

73

69

import dbus

74

70

import dbus.service

79

75

import ctypes.util

80

76

import xml.dom.minidom

81

77

import inspect

78

import GnuPGInterface

82

79

83

80

try:

84

81

SO_BINDTODEVICE = socket.SO_BINDTODEVICE

88

85

except ImportError:

89

86

SO_BINDTODEVICE = None

90

87

91

if sys.version_info.major == 2:

92

str = unicode

93

94

version = "1.6.8"

88

version = "1.5.3"

95

89

stored_state_file = "clients.pickle"

96

90

97

91

logger = logging.getLogger()

98

syslogger = None

92

syslogger = (logging.handlers.SysLogHandler

93

(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

94

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

99

95

100

96

try:

101

97

if_nametoindex = (ctypes.cdll.LoadLibrary

107

103

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

108

104

with contextlib.closing(socket.socket()) as s:

109

105

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

110

struct.pack(b"16s16x", interface))

111

interface_index = struct.unpack("I", ifreq[16:20])[0]

106

struct.pack(str("16s16x"),

107

interface))

108

interface_index = struct.unpack(str("I"),

109

ifreq[16:20])[0]

112

110

return interface_index

113

111

114

112

115

113

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

116

114

"""init logger and add loglevel"""

117

115

118

global syslogger

119

syslogger = (logging.handlers.SysLogHandler

120

(facility =

121

logging.handlers.SysLogHandler.LOG_DAEMON,

122

address = "/dev/log"))

123

116

syslogger.setFormatter(logging.Formatter

124

117

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

125

118

' %(message)s'))

143

136

class PGPEngine(object):

144

137

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

145

138

def __init__(self):

139

self.gnupg = GnuPGInterface.GnuPG()

146

140

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

147

self.gnupgargs = ['--batch',

148

'--home', self.tempdir,

149

'--force-mdc',

150

'--quiet',

151

'--no-use-agent']

141

self.gnupg = GnuPGInterface.GnuPG()

142

self.gnupg.options.meta_interactive = False

143

self.gnupg.options.homedir = self.tempdir

144

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

145

'--quiet',

146

'--no-use-agent'])

152

147

153

148

def __enter__(self):

154

149

return self

155

150

156

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

151

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

157

152

self._cleanup()

158

153

return False

159

154

176

171

def password_encode(self, password):

177

172

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

178

173

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

179

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

180

if len(encoded) > 2048:

181

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

182

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

183

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

184

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

185

return encoded

174

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

186

175

187

176

def encrypt(self, data, password):

188

passphrase = self.password_encode(password)

189

with tempfile.NamedTemporaryFile(dir=self.tempdir

190

) as passfile:

191

passfile.write(passphrase)

192

passfile.flush()

193

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

194

'--passphrase-file',

195

passfile.name]

196

+ self.gnupgargs,

197

stdin = subprocess.PIPE,

198

stdout = subprocess.PIPE,

199

stderr = subprocess.PIPE)

200

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

201

if proc.returncode != 0:

202

raise PGPError(err)

177

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

178

with open(os.devnull) as devnull:

179

try:

180

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

181

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

182

attach_fhs={'stderr': devnull})

183

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

184

f.write(data)

185

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

186

ciphertext = f.read()

187

proc.wait()

188

except IOError as e:

189

raise PGPError(e)

190

self.gnupg.passphrase = None

203

191

return ciphertext

204

192

205

193

def decrypt(self, data, password):

206

passphrase = self.password_encode(password)

207

with tempfile.NamedTemporaryFile(dir = self.tempdir

208

) as passfile:

209

passfile.write(passphrase)

210

passfile.flush()

211

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

212

'--passphrase-file',

213

passfile.name]

214

+ self.gnupgargs,

215

stdin = subprocess.PIPE,

216

stdout = subprocess.PIPE,

217

stderr = subprocess.PIPE)

218

decrypted_plaintext, err = proc.communicate(input

219

= data)

220

if proc.returncode != 0:

221

raise PGPError(err)

194

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

195

with open(os.devnull) as devnull:

196

try:

197

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

198

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

199

attach_fhs={'stderr': devnull})

200

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

201

f.write(data)

202

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

203

decrypted_plaintext = f.read()

204

proc.wait()

205

except IOError as e:

206

raise PGPError(e)

207

self.gnupg.passphrase = None

222

208

return decrypted_plaintext

223

209

224

210

211

225

212

class AvahiError(Exception):

226

213

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

227

214

self.value = value

228

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

229

**kwargs)

215

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

216

def __unicode__(self):

217

return unicode(repr(self.value))

230

218

231

219

class AvahiServiceError(AvahiError):

232

220

pass

243

231

Used to optionally bind to the specified interface.

244

232

name: string; Example: 'Mandos'

245

233

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

246

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

234

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

247

235

port: integer; what port to announce

248

236

TXT: list of strings; TXT record for the service

249

237

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

255

243

server: D-Bus Server

256

244

bus: dbus.SystemBus()

257

245

"""

258

259

246

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

260

247

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

261

248

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

274

261

self.server = None

275

262

self.bus = bus

276

263

self.entry_group_state_changed_match = None

277

278

264

def rename(self):

279

265

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

280

266

if self.rename_count >= self.max_renames:

282

268

" after %i retries, exiting.",

283

269

self.rename_count)

284

270

raise AvahiServiceError("Too many renames")

285

self.name = str(self.server

286

.GetAlternativeServiceName(self.name))

271

self.name = unicode(self.server

272

.GetAlternativeServiceName(self.name))

287

273

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

288

274

self.name)

289

275

self.remove()

290

276

try:

291

277

self.add()

292

278

except dbus.exceptions.DBusException as error:

293

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

279

logger.critical("DBusException: %s", error)

294

280

self.cleanup()

295

281

os._exit(1)

296

282

self.rename_count += 1

297

298

283

def remove(self):

299

284

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

300

285

if self.entry_group_state_changed_match is not None:

302

287

self.entry_group_state_changed_match = None

303

288

if self.group is not None:

304

289

self.group.Reset()

305

306

290

def add(self):

307

291

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

308

292

self.remove()

325

309

dbus.UInt16(self.port),

326

310

avahi.string_array_to_txt_array(self.TXT))

327

311

self.group.Commit()

328

329

312

def entry_group_state_changed(self, state, error):

330

313

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

331

314

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

337

320

self.rename()

338

321

elif state == avahi.ENTRY_GROUP_FAILURE:

339

322

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

340

str(error))

341

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

342

.format(error))

343

323

unicode(error))

324

raise AvahiGroupError("State changed: %s"

325

% unicode(error))

344

326

def cleanup(self):

345

327

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

346

328

if self.group is not None:

351

333

pass

352

334

self.group = None

353

335

self.remove()

354

355

336

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

356

337

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

357

338

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

376

357

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

377

358

else:

378

359

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

379

380

360

def activate(self):

381

361

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

382

362

if self.server is None:

389

369

self.server_state_changed)

390

370

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

391

371

392

393

372

class AvahiServiceToSyslog(AvahiService):

394

373

def rename(self):

395

374

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

396

375

ret = AvahiService.rename(self)

397

376

syslogger.setFormatter(logging.Formatter

398

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

399

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

400

.format(self.name)))

377

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

378

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

379

% self.name))

401

380

return ret

402

381

403

382

def timedelta_to_milliseconds(td):

383

"Convert a datetime.timedelta() to milliseconds"

384

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

385

+ (td.seconds * 1000)

386

+ (td.microseconds // 1000))

387

404

388

class Client(object):

405

389

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

406

390

442

426

runtime_expansions: Allowed attributes for runtime expansion.

443

427

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

444

428

disabled, or None

445

server_settings: The server_settings dict from main()

446

429

"""

447

430

448

431

runtime_expansions = ("approval_delay", "approval_duration",

449

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

450

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

451

"last_approval_request", "last_checked_ok",

432

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

433

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

452

434

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

453

client_defaults = { "timeout": "PT5M",

454

"extended_timeout": "PT15M",

455

"interval": "PT2M",

435

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

436

"extended_timeout": "15m",

437

"interval": "2m",

456

438

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

457

439

"host": "",

458

"approval_delay": "PT0S",

459

"approval_duration": "PT1S",

440

"approval_delay": "0s",

441

"approval_duration": "1s",

460

442

"approved_by_default": "True",

461

443

"enabled": "True",

462

444

}

463

445

446

def timeout_milliseconds(self):

447

"Return the 'timeout' attribute in milliseconds"

448

return timedelta_to_milliseconds(self.timeout)

449

450

def extended_timeout_milliseconds(self):

451

"Return the 'extended_timeout' attribute in milliseconds"

452

return timedelta_to_milliseconds(self.extended_timeout)

453

454

def interval_milliseconds(self):

455

"Return the 'interval' attribute in milliseconds"

456

return timedelta_to_milliseconds(self.interval)

457

458

def approval_delay_milliseconds(self):

459

return timedelta_to_milliseconds(self.approval_delay)

460

464

461

@staticmethod

465

462

def config_parser(config):

466

463

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

491

488

"rb") as secfile:

492

489

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

493

490

else:

494

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

495

.format(section))

491

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

492

% section)

496

493

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

497

494

client["extended_timeout"] = string_to_delta(

498

495

section["extended_timeout"])

507

504

client["last_checker_status"] = -2

508

505

509

506

return settings

510

511

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

507

508

509

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

510

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

511

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

512

attribute."""

512

513

self.name = name

513

if server_settings is None:

514

server_settings = {}

515

self.server_settings = server_settings

516

514

# adding all client settings

517

for setting, value in settings.items():

515

for setting, value in settings.iteritems():

518

516

setattr(self, setting, value)

519

517

520

518

if self.enabled:

526

524

else:

527

525

self.last_enabled = None

528

526

self.expires = None

529

527

530

528

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

531

529

# Uppercase and remove spaces from fingerprint for later

532

530

# comparison purposes with return value from the fingerprint()

534

532

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

535

533

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

536

534

datetime.datetime.utcnow())

537

535

538

536

# attributes specific for this server instance

539

537

self.checker = None

540

538

self.checker_initiator_tag = None

568

566

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

569

567

# Already enabled

570

568

return

569

self.send_changedstate()

571

570

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

572

571

self.enabled = True

573

572

self.last_enabled = datetime.datetime.utcnow()

574

573

self.init_checker()

575

self.send_changedstate()

576

574

577

575

def disable(self, quiet=True):

578

576

"""Disable this client."""

579

577

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

580

578

return False

581

579

if not quiet:

580

self.send_changedstate()

581

if not quiet:

582

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

583

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

583

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

584

gobject.source_remove(self.disable_initiator_tag)

585

self.disable_initiator_tag = None

586

self.expires = None

587

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

587

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

588

gobject.source_remove(self.checker_initiator_tag)

589

self.checker_initiator_tag = None

590

self.stop_checker()

591

self.enabled = False

592

if not quiet:

593

self.send_changedstate()

594

592

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

595

593

return False

596

594

600

598

def init_checker(self):

601

599

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

602

600

# and every interval from then on.

603

if self.checker_initiator_tag is not None:

604

gobject.source_remove(self.checker_initiator_tag)

605

601

self.checker_initiator_tag = (gobject.timeout_add

606

(int(self.interval

607

.total_seconds() * 1000),

602

(self.interval_milliseconds(),

608

603

self.start_checker))

609

604

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

610

if self.disable_initiator_tag is not None:

611

gobject.source_remove(self.disable_initiator_tag)

612

605

self.disable_initiator_tag = (gobject.timeout_add

613

(int(self.timeout

614

.total_seconds() * 1000),

615

self.disable))

606

(self.timeout_milliseconds(),

607

self.disable))

616

608

# Also start a new checker *right now*.

617

609

self.start_checker()

618

610

646

638

timeout = self.timeout

647

639

if self.disable_initiator_tag is not None:

648

640

gobject.source_remove(self.disable_initiator_tag)

649

self.disable_initiator_tag = None

650

641

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

651

642

self.disable_initiator_tag = (gobject.timeout_add

652

(int(timeout.total_seconds()

653

* 1000), self.disable))

643

(timedelta_to_milliseconds

644

(timeout), self.disable))

654

645

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

655

646

656

647

def need_approval(self):

662

653

If a checker already exists, leave it running and do

663

654

nothing."""

664

655

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

665

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

666

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

667

# would inevitably timeout, since no checker would get a

668

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

656

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

657

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

658

# client would inevitably timeout, since no checker would get

659

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

669

660

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

670

661

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

671

662

# should be.

673

664

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

674

665

try:

675

666

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

676

except AttributeError:

677

pass

678

except OSError as error:

679

if error.errno != errno.ECHILD:

680

raise

667

except (AttributeError, OSError) as error:

668

if (isinstance(error, OSError)

669

and error.errno != errno.ECHILD):

670

raise error

681

671

else:

682

672

if pid:

683

673

logger.warning("Checker was a zombie")

686

676

self.current_checker_command)

687

677

# Start a new checker if needed

688

678

if self.checker is None:

689

# Escape attributes for the shell

690

escaped_attrs = { attr:

691

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

692

for attr in self.runtime_expansions }

693

679

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

680

# In case checker_command has exactly one % operator

681

command = self.checker_command % self.host

682

except TypeError:

683

# Escape attributes for the shell

684

escaped_attrs = dict(

685

(attr,

686

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

687

errors=

688

'replace')))

689

for attr in

690

self.runtime_expansions)

691

692

try:

693

command = self.checker_command % escaped_attrs

694

except TypeError as error:

695

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

696

' %s', self.checker_command, error)

697

return True # Try again later

699

698

self.current_checker_command = command

700

699

try:

701

700

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

704

703

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

705

704

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

706

705

# always replaced by /dev/null.)

707

# The exception is when not debugging but nevertheless

708

# running in the foreground; use the previously

709

# created wnull.

710

popen_args = {}

711

if (not self.server_settings["debug"]

712

and self.server_settings["foreground"]):

713

popen_args.update({"stdout": wnull,

714

"stderr": wnull })

715

706

self.checker = subprocess.Popen(command,

716

707

close_fds=True,

717

shell=True, cwd="/",

718

**popen_args)

719

except OSError as error:

720

logger.error("Failed to start subprocess",

721

exc_info=error)

722

return True

723

self.checker_callback_tag = (gobject.child_watch_add

724

(self.checker.pid,

725

self.checker_callback,

726

data=command))

727

# The checker may have completed before the gobject

728

# watch was added. Check for this.

729

try:

708

shell=True, cwd="/")

709

self.checker_callback_tag = (gobject.child_watch_add

710

(self.checker.pid,

711

self.checker_callback,

712

data=command))

713

# The checker may have completed before the gobject

714

# watch was added. Check for this.

730

715

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

716

if pid:

717

gobject.source_remove(self.checker_callback_tag)

718

self.checker_callback(pid, status, command)

731

719

except OSError as error:

732

if error.errno == errno.ECHILD:

733

# This should never happen

734

logger.error("Child process vanished",

735

exc_info=error)

736

return True

737

raise

738

if pid:

739

gobject.source_remove(self.checker_callback_tag)

740

self.checker_callback(pid, status, command)

720

logger.error("Failed to start subprocess: %s",

721

error)

741

722

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

742

723

return True

743

724

750

731

return

751

732

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

752

733

try:

753

self.checker.terminate()

734

os.kill(self.checker.pid, signal.SIGTERM)

754

735

#time.sleep(0.5)

755

736

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

756

# self.checker.kill()

737

# os.kill(self.checker.pid, signal.SIGKILL)

757

738

except OSError as error:

758

739

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

759

740

raise

776

757

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

777

758

if byte_arrays and signature != "ay":

778

759

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

779

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

760

" signature %r" % signature)

780

761

def decorator(func):

781

762

func._dbus_is_property = True

782

763

func._dbus_interface = dbus_interface

790

771

return decorator

791

772

792

773

793

def dbus_interface_annotations(dbus_interface):

794

"""Decorator for marking functions returning interface annotations

795

796

Usage:

797

798

@dbus_interface_annotations("org.example.Interface")

799

def _foo(self): # Function name does not matter

800

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

801

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

802

"false"}

803

"""

804

def decorator(func):

805

func._dbus_is_interface = True

806

func._dbus_interface = dbus_interface

807

func._dbus_name = dbus_interface

808

return func

809

return decorator

810

811

812

def dbus_annotations(annotations):

813

"""Decorator to annotate D-Bus methods, signals or properties

814

Usage:

815

816

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

817

"org.freedesktop.DBus.Property."

818

"EmitsChangedSignal": "false"})

819

@dbus_service_property("org.example.Interface", signature="b",

820

access="r")

821

def Property_dbus_property(self):

822

return dbus.Boolean(False)

823

"""

824

def decorator(func):

825

func._dbus_annotations = annotations

826

return func

827

return decorator

828

829

830

774

class DBusPropertyException(dbus.exceptions.DBusException):

831

775

"""A base class for D-Bus property-related exceptions

832

776

"""

833

pass

777

def __unicode__(self):

778

return unicode(str(self))

779

834

780

835

781

class DBusPropertyAccessException(DBusPropertyException):

836

782

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

853

799

"""

854

800

855

801

@staticmethod

856

def _is_dbus_thing(thing):

857

"""Returns a function testing if an attribute is a D-Bus thing

858

859

If called like _is_dbus_thing("method") it returns a function

860

suitable for use as predicate to inspect.getmembers().

861

"""

862

return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),

863

False)

802

def _is_dbus_property(obj):

803

return getattr(obj, "_dbus_is_property", False)

864

804

865

def _get_all_dbus_things(self, thing):

805

def _get_all_dbus_properties(self):

866

806

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

867

807

"""

868

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

869

name),

870

athing.__get__(self))

808

return ((prop.__get__(self)._dbus_name, prop.__get__(self))

871

809

for cls in self.__class__.__mro__

872

for name, athing in

873

inspect.getmembers(cls,

874

self._is_dbus_thing(thing)))

810

for name, prop in

811

inspect.getmembers(cls, self._is_dbus_property))

875

812

876

813

def _get_dbus_property(self, interface_name, property_name):

877

814

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

879

816

"""

880

817

for cls in self.__class__.__mro__:

881

818

for name, value in (inspect.getmembers

882

(cls,

883

self._is_dbus_thing("property"))):

819

(cls, self._is_dbus_property)):

884

820

if (value._dbus_name == property_name

885

821

and value._dbus_interface == interface_name):

886

822

return value.__get__(self)

914

850

# The byte_arrays option is not supported yet on

915

851

# signatures other than "ay".

916

852

if prop._dbus_signature != "ay":

917

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

918

"'ay' signature {!r}"

919

.format(prop._dbus_signature))

853

raise ValueError

920

854

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

921

855

for byte in value))

922

856

prop(value)

930

864

Note: Will not include properties with access="write".

931

865

"""

932

866

properties = {}

933

for name, prop in self._get_all_dbus_things("property"):

867

for name, prop in self._get_all_dbus_properties():

934

868

if (interface_name

935

869

and interface_name != prop._dbus_interface):

936

870

# Interface non-empty but did not match

946

880

value.variant_level+1)

947

881

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

948

882

949

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

950

def PropertiesChanged(self, interface_name, changed_properties,

951

invalidated_properties):

952

"""Standard D-Bus PropertiesChanged() signal, see D-Bus

953

standard.

954

"""

955

pass

956

957

883

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

958

884

out_signature="s",

959

885

path_keyword='object_path',

960

886

connection_keyword='connection')

961

887

def Introspect(self, object_path, connection):

962

"""Overloading of standard D-Bus method.

963

964

Inserts property tags and interface annotation tags.

888

"""Standard D-Bus method, overloaded to insert property tags.

965

889

"""

966

890

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

967

891

connection)

974

898

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

975

899

return e

976

900

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

977

# Add property tags

978

901

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

979

902

for name, prop

980

in self._get_all_dbus_things("property")

903

in self._get_all_dbus_properties()

981

904

if prop._dbus_interface

982

905

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

983

906

if_tag.appendChild(tag)

984

# Add annotation tags

985

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

986

for tag in if_tag.getElementsByTagName(typ):

987

annots = dict()

988

for name, prop in (self.

989

_get_all_dbus_things(typ)):

990

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

991

and prop._dbus_interface

992

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

993

annots.update(getattr

994

(prop,

995

"_dbus_annotations",

996

{}))

997

for name, value in annots.items():

998

ann_tag = document.createElement(

999

"annotation")

1000

ann_tag.setAttribute("name", name)

1001

ann_tag.setAttribute("value", value)

1002

tag.appendChild(ann_tag)

1003

# Add interface annotation tags

1004

for annotation, value in dict(

1005

itertools.chain.from_iterable(

1006

annotations().items()

1007

for name, annotations in

1008

self._get_all_dbus_things("interface")

1009

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

1010

)).items():

1011

ann_tag = document.createElement("annotation")

1012

ann_tag.setAttribute("name", annotation)

1013

ann_tag.setAttribute("value", value)

1014

if_tag.appendChild(ann_tag)

1015

907

# Add the names to the return values for the

1016

908

# "org.freedesktop.DBus.Properties" methods

1017

909

if (if_tag.getAttribute("name")

1032

924

except (AttributeError, xml.dom.DOMException,

1033

925

xml.parsers.expat.ExpatError) as error:

1034

926

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

1035

exc_info=error)

927

error)

1036

928

return xmlstring

1037

929

1038

930

1039

def datetime_to_dbus(dt, variant_level=0):

931

def datetime_to_dbus (dt, variant_level=0):

1040

932

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

1041

933

if dt is None:

1042

934

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

1044

936

variant_level=variant_level)

1045

937

1046

938

1047

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1048

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

1049

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

1050

interface names according to the "alt_interface_names" mapping.

1051

Usage:

1052

1053

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

1054

"net.example.AlternateInterface"})

1055

class SampleDBusObject(dbus.service.Object):

1056

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

1057

def SampleDBusMethod():

1058

pass

1059

1060

The above "SampleDBusMethod" on "SampleDBusObject" will be

1061

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

1062

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

1063

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

1064

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

1065

1066

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

1067

(from DBusObjectWithProperties) and interfaces (from the

1068

dbus_interface_annotations decorator).

939

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

940

.__metaclass__):

941

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

942

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

1069

943

"""

1070

def wrapper(cls):

1071

for orig_interface_name, alt_interface_name in (

1072

alt_interface_names.items()):

1073

attr = {}

1074

interface_names = set()

1075

# Go though all attributes of the class

1076

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

944

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

945

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

946

# methods, signals, or properties in them

947

for base in (b for b in bases

948

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

949

# Go though all attributes of the base class

950

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

1077

951

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

1078

952

# with the wrong interface name

1079

953

if (not hasattr(attribute, "_dbus_interface")

1080

954

or not attribute._dbus_interface

1081

.startswith(orig_interface_name)):

955

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

1082

956

continue

1083

957

# Create an alternate D-Bus interface name based on

1084

958

# the current name

1085

959

alt_interface = (attribute._dbus_interface

1086

.replace(orig_interface_name,

1087

alt_interface_name))

1088

interface_names.add(alt_interface)

960

.replace("se.recompile.Mandos",

961

"se.bsnet.fukt.Mandos"))

1089

962

# Is this a D-Bus signal?

1090

963

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

1091

# Extract the original non-method undecorated

1092

# function by black magic

964

# Extract the original non-method function by

965

# black magic

1093

966

nonmethod_func = (dict(

1094

967

zip(attribute.func_code.co_freevars,

1095

968

attribute.__closure__))["func"]

1106

979

nonmethod_func.func_name,

1107

980

nonmethod_func.func_defaults,

1108

981

nonmethod_func.func_closure)))

1109

# Copy annotations, if any

1110

try:

1111

new_function._dbus_annotations = (

1112

dict(attribute._dbus_annotations))

1113

except AttributeError:

1114

pass

1115

982

# Define a creator of a function to call both the

1116

# original and alternate functions, so both the

1117

# original and alternate signals gets sent when

1118

# the function is called

983

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

984

# signals gets sent when the function is called

1119

985

def fixscope(func1, func2):

1120

986

"""This function is a scope container to pass

1121

987

func1 and func2 to the "call_both" function

1128

994

return call_both

1129

995

# Create the "call_both" function and add it to

1130

996

# the class

1131

attr[attrname] = fixscope(attribute, new_function)

997

attr[attrname] = fixscope(attribute,

998

new_function)

1132

999

# Is this a D-Bus method?

1133

1000

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

1134

1001

# Create a new, but exactly alike, function

1145

1012

attribute.func_name,

1146

1013

attribute.func_defaults,

1147

1014

attribute.func_closure)))

1148

# Copy annotations, if any

1149

try:

1150

attr[attrname]._dbus_annotations = (

1151

dict(attribute._dbus_annotations))

1152

except AttributeError:

1153

pass

1154

1015

# Is this a D-Bus property?

1155

1016

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

1156

1017

# Create a new, but exactly alike, function

1170

1031

attribute.func_name,

1171

1032

attribute.func_defaults,

1172

1033

attribute.func_closure)))

1173

# Copy annotations, if any

1174

try:

1175

attr[attrname]._dbus_annotations = (

1176

dict(attribute._dbus_annotations))

1177

except AttributeError:

1178

pass

1179

# Is this a D-Bus interface?

1180

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

1181

# Create a new, but exactly alike, function

1182

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

1183

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

1184

# to the class.

1185

attr[attrname] = (dbus_interface_annotations

1186

(alt_interface)

1187

(types.FunctionType

1188

(attribute.func_code,

1189

attribute.func_globals,

1190

attribute.func_name,

1191

attribute.func_defaults,

1192

attribute.func_closure)))

1193

if deprecate:

1194

# Deprecate all alternate interfaces

1195

iname="_AlternateDBusNames_interface_annotation{}"

1196

for interface_name in interface_names:

1197

@dbus_interface_annotations(interface_name)

1198

def func(self):

1199

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

1200

"true" }

1201

# Find an unused name

1202

for aname in (iname.format(i)

1203

for i in itertools.count()):

1204

if aname not in attr:

1205

attr[aname] = func

1206

break

1207

if interface_names:

1208

# Replace the class with a new subclass of it with

1209

# methods, signals, etc. as created above.

1210

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

1211

(cls,), attr)

1212

return cls

1213

return wrapper

1214

1215

1216

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

1217

"se.bsnet.fukt.Mandos"})

1034

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

1035

1036

1218

1037

class ClientDBus(Client, DBusObjectWithProperties):

1219

1038

"""A Client class using D-Bus

1220

1039

1226

1045

runtime_expansions = (Client.runtime_expansions

1227

1046

+ ("dbus_object_path",))

1228

1047

1229

_interface = "se.recompile.Mandos.Client"

1230

1231

1048

# dbus.service.Object doesn't use super(), so we can't either.

1232

1049

1233

1050

def __init__(self, bus = None, *args, **kwargs):

1235

1052

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

1236

1053

# Only now, when this client is initialized, can it show up on

1237

1054

# the D-Bus

1238

client_object_name = str(self.name).translate(

1055

client_object_name = unicode(self.name).translate(

1239

1056

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

1240

1057

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

1241

1058

self.dbus_object_path = (dbus.ObjectPath

1242

1059

("/clients/" + client_object_name))

1243

1060

DBusObjectWithProperties.__init__(self, self.bus,

1244

1061

self.dbus_object_path)

1245

1062

1246

1063

def notifychangeproperty(transform_func,

1247

1064

dbus_name, type_func=lambda x: x,

1248

variant_level=1, invalidate_only=False,

1249

_interface=_interface):

1065

variant_level=1):

1250

1066

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

1251

1067

its changes to DBus.

1252

1068

1257

1073

to the D-Bus. Default: no transform

1258

1074

variant_level: D-Bus variant level. Default: 1

1259

1075

"""

1260

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

1076

attrname = "_{0}".format(dbus_name)

1261

1077

def setter(self, value):

1262

1078

if hasattr(self, "dbus_object_path"):

1263

1079

if (not hasattr(self, attrname) or

1264

1080

type_func(getattr(self, attrname, None))

1265

1081

!= type_func(value)):

1266

if invalidate_only:

1267

self.PropertiesChanged(_interface,

1268

dbus.Dictionary(),

1269

dbus.Array

1270

((dbus_name,)))

1271

else:

1272

dbus_value = transform_func(type_func(value),

1273

variant_level

1274

=variant_level)

1275

self.PropertyChanged(dbus.String(dbus_name),

1276

dbus_value)

1277

self.PropertiesChanged(_interface,

1278

dbus.Dictionary({

1279

dbus.String(dbus_name):

1280

dbus_value }), dbus.Array())

1082

dbus_value = transform_func(type_func(value),

1083

variant_level

1084

=variant_level)

1085

self.PropertyChanged(dbus.String(dbus_name),

1086

dbus_value)

1281

1087

setattr(self, attrname, value)

1282

1088

1283

1089

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

1284

1090

1091

1285

1092

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1286

1093

approvals_pending = notifychangeproperty(dbus.Boolean,

1287

1094

"ApprovalPending",

1303

1110

approval_delay = notifychangeproperty(dbus.UInt64,

1304

1111

"ApprovalDelay",

1305

1112

type_func =

1306

lambda td: td.total_seconds()

1307

* 1000)

1113

timedelta_to_milliseconds)

1308

1114

approval_duration = notifychangeproperty(

1309

1115

dbus.UInt64, "ApprovalDuration",

1310

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

1116

type_func = timedelta_to_milliseconds)

1311

1117

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

1312

1118

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

1313

type_func = lambda td:

1314

td.total_seconds() * 1000)

1119

type_func =

1120

timedelta_to_milliseconds)

1315

1121

extended_timeout = notifychangeproperty(

1316

1122

dbus.UInt64, "ExtendedTimeout",

1317

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

1123

type_func = timedelta_to_milliseconds)

1318

1124

interval = notifychangeproperty(dbus.UInt64,

1319

1125

"Interval",

1320

1126

type_func =

1321

lambda td: td.total_seconds()

1322

* 1000)

1127

timedelta_to_milliseconds)

1323

1128

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

1324

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

1325

invalidate_only=True)

1326

1129

1327

1130

del notifychangeproperty

1328

1131

1355

1158

*args, **kwargs)

1356

1159

1357

1160

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

1358

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

1161

old_checker = self.checker

1162

if self.checker is not None:

1163

old_checker_pid = self.checker.pid

1164

else:

1165

old_checker_pid = None

1359

1166

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

1360

1167

# Only if new checker process was started

1361

1168

if (self.checker is not None

1369

1176

return False

1370

1177

1371

1178

def approve(self, value=True):

1179

self.send_changedstate()

1372

1180

self.approved = value

1373

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

1374

* 1000), self._reset_approved)

1375

self.send_changedstate()

1181

gobject.timeout_add(timedelta_to_milliseconds

1182

(self.approval_duration),

1183

self._reset_approved)

1184

1376

1185

1377

1186

## D-Bus methods, signals & properties

1378

1379

## Interfaces

1187

_interface = "se.recompile.Mandos.Client"

1380

1188

1381

1189

## Signals

1382

1190

1393

1201

pass

1394

1202

1395

1203

# PropertyChanged - signal

1396

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

1397

1204

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

1398

1205

def PropertyChanged(self, property, value):

1399

1206

"D-Bus signal"

1475

1282

access="readwrite")

1476

1283

def ApprovalDelay_dbus_property(self, value=None):

1477

1284

if value is None: # get

1478

return dbus.UInt64(self.approval_delay.total_seconds()

1479

* 1000)

1285

return dbus.UInt64(self.approval_delay_milliseconds())

1480

1286

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

1481

1287

1482

1288

# ApprovalDuration - property

1484

1290

access="readwrite")

1485

1291

def ApprovalDuration_dbus_property(self, value=None):

1486

1292

if value is None: # get

1487

return dbus.UInt64(self.approval_duration.total_seconds()

1488

* 1000)

1293

return dbus.UInt64(timedelta_to_milliseconds(

1294

self.approval_duration))

1489

1295

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

1490

1296

1491

1297

# Name - property

1504

1310

def Host_dbus_property(self, value=None):

1505

1311

if value is None: # get

1506

1312

return dbus.String(self.host)

1507

self.host = str(value)

1313

self.host = unicode(value)

1508

1314

1509

1315

# Created - property

1510

1316

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

1557

1363

access="readwrite")

1558

1364

def Timeout_dbus_property(self, value=None):

1559

1365

if value is None: # get

1560

return dbus.UInt64(self.timeout.total_seconds() * 1000)

1561

old_timeout = self.timeout

1366

return dbus.UInt64(self.timeout_milliseconds())

1562

1367

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

1563

# Reschedule disabling

1368

# Reschedule timeout

1564

1369

if self.enabled:

1565

1370

now = datetime.datetime.utcnow()

1566

self.expires += self.timeout - old_timeout

1567

if self.expires <= now:

1371

time_to_die = timedelta_to_milliseconds(

1372

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

1373

if time_to_die <= 0:

1568

1374

# The timeout has passed

1569

1375

self.disable()

1570

1376

else:

1377

self.expires = (now +

1378

datetime.timedelta(milliseconds =

1379

time_to_die))

1571

1380

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

1572

1381

is None):

1573

1382

return

1574

1383

gobject.source_remove(self.disable_initiator_tag)

1575

self.disable_initiator_tag = (

1576

gobject.timeout_add(

1577

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

1578

* 1000), self.disable))

1384

self.disable_initiator_tag = (gobject.timeout_add

1385

(time_to_die,

1386

self.disable))

1579

1387

1580

1388

# ExtendedTimeout - property

1581

1389

@dbus_service_property(_interface, signature="t",

1582

1390

access="readwrite")

1583

1391

def ExtendedTimeout_dbus_property(self, value=None):

1584

1392

if value is None: # get

1585

return dbus.UInt64(self.extended_timeout.total_seconds()

1586

* 1000)

1393

return dbus.UInt64(self.extended_timeout_milliseconds())

1587

1394

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

1588

1395

1589

1396

# Interval - property

1591

1398

access="readwrite")

1592

1399

def Interval_dbus_property(self, value=None):

1593

1400

if value is None: # get

1594

return dbus.UInt64(self.interval.total_seconds() * 1000)

1401

return dbus.UInt64(self.interval_milliseconds())

1595

1402

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

1596

1403

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

1597

1404

return

1608

1415

def Checker_dbus_property(self, value=None):

1609

1416

if value is None: # get

1610

1417

return dbus.String(self.checker_command)

1611

self.checker_command = str(value)

1418

self.checker_command = unicode(value)

1612

1419

1613

1420

# CheckerRunning - property

1614

1421

@dbus_service_property(_interface, signature="b",

1630

1437

@dbus_service_property(_interface, signature="ay",

1631

1438

access="write", byte_arrays=True)

1632

1439

def Secret_dbus_property(self, value):

1633

self.secret = bytes(value)

1440

self.secret = str(value)

1634

1441

1635

1442

del _interface

1636

1443

1661

1468

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

1662

1469

1663

1470

1471

class ClientDBusTransitional(ClientDBus):

1472

__metaclass__ = AlternateDBusNamesMetaclass

1473

1474

1664

1475

class ClientHandler(socketserver.BaseRequestHandler, object):

1665

1476

"""A class to handle client connections.

1666

1477

1670

1481

def handle(self):

1671

1482

with contextlib.closing(self.server.child_pipe) as child_pipe:

1672

1483

logger.info("TCP connection from: %s",

1673

str(self.client_address))

1484

unicode(self.client_address))

1674

1485

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

1675

1486

self.server.child_pipe.fileno())

1676

1487

1702

1513

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

1703

1514

try:

1704

1515

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

1705

raise RuntimeError(line)

1516

raise RuntimeError

1706

1517

except (ValueError, IndexError, RuntimeError) as error:

1707

1518

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

1708

1519

return

1757

1568

if self.server.use_dbus:

1758

1569

# Emit D-Bus signal

1759

1570

client.NeedApproval(

1760

client.approval_delay.total_seconds()

1761

* 1000, client.approved_by_default)

1571

client.approval_delay_milliseconds(),

1572

client.approved_by_default)

1762

1573

else:

1763

1574

logger.warning("Client %s was not approved",

1764

1575

client.name)

1770

1581

#wait until timeout or approved

1771

1582

time = datetime.datetime.now()

1772

1583

client.changedstate.acquire()

1773

client.changedstate.wait(delay.total_seconds())

1584

(client.changedstate.wait

1585

(float(client.timedelta_to_milliseconds(delay)

1586

/ 1000)))

1774

1587

client.changedstate.release()

1775

1588

time2 = datetime.datetime.now()

1776

1589

if (time2 - time) >= delay:

1792

1605

try:

1793

1606

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

1794

1607

except gnutls.errors.GNUTLSError as error:

1795

logger.warning("gnutls send failed",

1796

exc_info=error)

1608

logger.warning("gnutls send failed")

1797

1609

return

1798

1610

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

1799

1611

sent, len(client.secret)

1813

1625

try:

1814

1626

session.bye()

1815

1627

except gnutls.errors.GNUTLSError as error:

1816

logger.warning("GnuTLS bye failed",

1817

exc_info=error)

1628

logger.warning("GnuTLS bye failed")

1818

1629

1819

1630

@staticmethod

1820

1631

def peer_certificate(session):

1892

1703

def process_request(self, request, address):

1893

1704

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

1894

1705

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

1895

args = (request, address))

1706

args = (request,

1707

address))

1896

1708

proc.start()

1897

1709

return proc

1898

1710

1913

1725

1914

1726

def add_pipe(self, parent_pipe, proc):

1915

1727

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

1916

raise NotImplementedError()

1728

raise NotImplementedError

1917

1729

1918

1730

1919

1731

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1926

1738

use_ipv6: Boolean; to use IPv6 or not

1927

1739

"""

1928

1740

def __init__(self, server_address, RequestHandlerClass,

1929

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

1930

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

1931

creating a new one with socket.socket().

1932

"""

1741

interface=None, use_ipv6=True):

1933

1742

self.interface = interface

1934

1743

if use_ipv6:

1935

1744

self.address_family = socket.AF_INET6

1936

if socketfd is not None:

1937

# Save the file descriptor

1938

self.socketfd = socketfd

1939

# Save the original socket.socket() function

1940

self.socket_socket = socket.socket

1941

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

1942

#

1943

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

1944

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

1945

# patching socket.socket.)

1946

#

1947

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

1948

@functools.wraps(socket.socket)

1949

def socket_wrapper(*args, **kwargs):

1950

# Restore original function so subsequent calls are

1951

# not affected.

1952

socket.socket = self.socket_socket

1953

del self.socket_socket

1954

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

1955

# saved file descriptor.

1956

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

1957

# Replace socket.socket() function with wrapper

1958

socket.socket = socket_wrapper

1959

# The socketserver.TCPServer.__init__ will call

1960

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

1961

# socket_wrapper(), if socketfd was set.

1962

1745

socketserver.TCPServer.__init__(self, server_address,

1963

1746

RequestHandlerClass)

1964

1965

1747

def server_bind(self):

1966

1748

"""This overrides the normal server_bind() function

1967

1749

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

1975

1757

try:

1976

1758

self.socket.setsockopt(socket.SOL_SOCKET,

1977

1759

SO_BINDTODEVICE,

1978

(self.interface + "\0")

1979

.encode("utf-8"))

1760

str(self.interface

1761

+ '\0'))

1980

1762

except socket.error as error:

1981

if error.errno == errno.EPERM:

1982

logger.error("No permission to bind to"

1983

" interface %s", self.interface)

1984

elif error.errno == errno.ENOPROTOOPT:

1763

if error[0] == errno.EPERM:

1764

logger.error("No permission to"

1765

" bind to interface %s",

1766

self.interface)

1767

elif error[0] == errno.ENOPROTOOPT:

1985

1768

logger.error("SO_BINDTODEVICE not available;"

1986

1769

" cannot bind to interface %s",

1987

1770

self.interface)

1988

elif error.errno == errno.ENODEV:

1989

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

1990

" cannot bind", self.interface)

1991

1771

else:

1992

1772

raise

1993

1773

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

1996

1776

if self.address_family == socket.AF_INET6:

1997

1777

any_address = "::" # in6addr_any

1998

1778

else:

1999

any_address = "0.0.0.0" # INADDR_ANY

1779

any_address = socket.INADDR_ANY

2000

1780

self.server_address = (any_address,

2001

1781

self.server_address[1])

2002

1782

elif not self.server_address[1]:

2023

1803

"""

2024

1804

def __init__(self, server_address, RequestHandlerClass,

2025

1805

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

2026

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

1806

gnutls_priority=None, use_dbus=True):

2027

1807

self.enabled = False

2028

1808

self.clients = clients

2029

1809

if self.clients is None:

2033

1813

IPv6_TCPServer.__init__(self, server_address,

2034

1814

RequestHandlerClass,

2035

1815

interface = interface,

2036

use_ipv6 = use_ipv6,

2037

socketfd = socketfd)

1816

use_ipv6 = use_ipv6)

2038

1817

def server_activate(self):

2039

1818

if self.enabled:

2040

1819

return socketserver.TCPServer.server_activate(self)

2053

1832

2054

1833

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

2055

1834

proc = None, client_object=None):

1835

condition_names = {

1836

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

1837

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

1838

# blocking).

1839

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

1840

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

1841

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

1842

# broken, usually for pipes and

1843

# sockets).

1844

}

1845

conditions_string = ' | '.join(name

1846

for cond, name in

1847

condition_names.iteritems()

1848

if cond & condition)

2056

1849

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

2057

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

1850

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

2058

1851

# Wait for other process to exit

2059

1852

proc.join()

2060

1853

return False

2118

1911

return True

2119

1912

2120

1913

2121

def rfc3339_duration_to_delta(duration):

2122

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

2123

2124

>>> rfc3339_duration_to_delta("P7D")

2125

datetime.timedelta(7)

2126

>>> rfc3339_duration_to_delta("PT60S")

2127

datetime.timedelta(0, 60)

2128

>>> rfc3339_duration_to_delta("PT60M")

2129

datetime.timedelta(0, 3600)

2130

>>> rfc3339_duration_to_delta("PT24H")

2131

datetime.timedelta(1)

2132

>>> rfc3339_duration_to_delta("P1W")

2133

datetime.timedelta(7)

2134

>>> rfc3339_duration_to_delta("PT5M30S")

2135

datetime.timedelta(0, 330)

2136

>>> rfc3339_duration_to_delta("P1DT3M20S")

2137

datetime.timedelta(1, 200)

2138

"""

2139

2140

# Parsing an RFC 3339 duration with regular expressions is not

2141

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

2142

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

2143

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

2144

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

2145

# avoid excessive use of external libraries.

2146

2147

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

2148

Token = collections.namedtuple("Token",

2149

("regexp", # To match token; if

2150

# "value" is not None,

2151

# must have a "group"

2152

# containing digits

2153

"value", # datetime.timedelta or

2154

# None

2155

"followers")) # Tokens valid after

2156

# this token

2157

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

2158

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

2159

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

2160

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

2161

datetime.timedelta(seconds=1),

2162

frozenset((token_end,)))

2163

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

2164

datetime.timedelta(minutes=1),

2165

frozenset((token_second, token_end)))

2166

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

2167

datetime.timedelta(hours=1),

2168

frozenset((token_minute, token_end)))

2169

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

2170

None,

2171

frozenset((token_hour, token_minute,

2172

token_second)))

2173

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

2174

datetime.timedelta(days=1),

2175

frozenset((token_time, token_end)))

2176

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

2177

datetime.timedelta(weeks=4),

2178

frozenset((token_day, token_end)))

2179

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

2180

datetime.timedelta(weeks=52),

2181

frozenset((token_month, token_end)))

2182

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

2183

datetime.timedelta(weeks=1),

2184

frozenset((token_end,)))

2185

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

2186

frozenset((token_year, token_month,

2187

token_day, token_time,

2188

token_week)))

2189

# Define starting values

2190

value = datetime.timedelta() # Value so far

2191

found_token = None

2192

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

2193

s = duration # String left to parse

2194

# Loop until end token is found

2195

while found_token is not token_end:

2196

# Search for any currently valid tokens

2197

for token in followers:

2198

match = token.regexp.match(s)

2199

if match is not None:

2200

# Token found

2201

if token.value is not None:

2202

# Value found, parse digits

2203

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

2204

# Add to value so far

2205

value += factor * token.value

2206

# Strip token from string

2207

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

2208

# Go to found token

2209

found_token = token

2210

# Set valid next tokens

2211

followers = found_token.followers

2212

break

2213

else:

2214

# No currently valid tokens were found

2215

raise ValueError("Invalid RFC 3339 duration")

2216

# End token found

2217

return value

2218

2219

2220

1914

def string_to_delta(interval):

2221

1915

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

2222

1916

2233

1927

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

2234

1928

datetime.timedelta(0, 330)

2235

1929

"""

2236

2237

try:

2238

return rfc3339_duration_to_delta(interval)

2239

except ValueError:

2240

pass

2241

2242

1930

timevalue = datetime.timedelta(0)

2243

1931

for s in interval.split():

2244

1932

try:

2245

suffix = s[-1]

1933

suffix = unicode(s[-1])

2246

1934

value = int(s[:-1])

2247

1935

if suffix == "d":

2248

1936

delta = datetime.timedelta(value)

2255

1943

elif suffix == "w":

2256

1944

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

2257

1945

else:

2258

raise ValueError("Unknown suffix {!r}"

2259

.format(suffix))

2260

except IndexError as e:

1946

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

1947

except (ValueError, IndexError) as e:

2261

1948

raise ValueError(*(e.args))

2262

1949

timevalue += delta

2263

1950

return timevalue

2276

1963

sys.exit()

2277

1964

if not noclose:

2278

1965

# Close all standard open file descriptors

2279

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

1966

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

2280

1967

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

2281

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

2282

.format(os.devnull))

1968

raise OSError(errno.ENODEV,

1969

"%s not a character device"

1970

% os.path.devnull)

2283

1971

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

2284

1972

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

2285

1973

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

2294

1982

2295

1983

parser = argparse.ArgumentParser()

2296

1984

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

2297

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

1985

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

2298

1986

help="show version number and exit")

2299

1987

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

2300

1988

help="Bind to interface IF")

2306

1994

help="Run self-test")

2307

1995

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

2308

1996

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

2309

" to terminal", default=None)

1997

" to terminal")

2310

1998

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

2311

1999

help="Debug level for stdout output")

2312

2000

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

2319

2007

" files")

2320

2008

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

2321

2009

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

2322

" system bus interface", default=None)

2010

" system bus interface")

2323

2011

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

2324

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

2325

default=None)

2012

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

2326

2013

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

2327

2014

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

2328

" state", default=None)

2329

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

2330

help="Specify a file descriptor to a network"

2331

" socket to use instead of creating one")

2015

" state")

2332

2016

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

2333

2017

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

2334

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

2335

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

2336

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

2337

dest="zeroconf", help="Do not use Zeroconf",

2338

default=None)

2339

2018

2340

2019

options = parser.parse_args()

2341

2020

2342

2021

if options.check:

2343

2022

import doctest

2344

fail_count, test_count = doctest.testmod()

2345

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

2023

doctest.testmod()

2024

sys.exit()

2346

2025

2347

2026

# Default values for config file for server-global settings

2348

2027

server_defaults = { "interface": "",

2350

2029

"port": "",

2351

2030

"debug": "False",

2352

2031

"priority":

2353

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

2032

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

2354

2033

"servicename": "Mandos",

2355

2034

"use_dbus": "True",

2356

2035

"use_ipv6": "True",

2357

2036

"debuglevel": "",

2358

2037

"restore": "True",

2359

"socket": "",

2360

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

2361

"foreground": "False",

2362

"zeroconf": "True",

2038

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

2363

2039

}

2364

2040

2365

2041

# Parse config file for server-global settings

2370

2046

# Convert the SafeConfigParser object to a dict

2371

2047

server_settings = server_config.defaults()

2372

2048

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

2373

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

2049

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

2374

2050

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

2375

2051

option)

2376

2052

if server_settings["port"]:

2377

2053

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

2378

2054

"port")

2379

if server_settings["socket"]:

2380

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

2381

"socket")

2382

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

2383

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

2384

# happen with a supplied network socket.

2385

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

2386

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

2387

["socket"])

2388

2055

del server_config

2389

2056

2390

2057

# Override the settings from the config file with command line

2392

2059

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

2393

2060

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

2394

2061

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

2395

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

2062

"statedir"):

2396

2063

value = getattr(options, option)

2397

2064

if value is not None:

2398

2065

server_settings[option] = value

2399

2066

del options

2400

2067

# Force all strings to be unicode

2401

2068

for option in server_settings.keys():

2402

if isinstance(server_settings[option], bytes):

2403

server_settings[option] = (server_settings[option]

2404

.decode("utf-8"))

2405

# Force all boolean options to be boolean

2406

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

2407

"foreground", "zeroconf"):

2408

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

2409

# Debug implies foreground

2410

if server_settings["debug"]:

2411

server_settings["foreground"] = True

2069

if type(server_settings[option]) is str:

2070

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

2412

2071

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

2413

2072

2414

2073

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

2415

2074

2416

if (not server_settings["zeroconf"] and

2417

not (server_settings["port"]

2418

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

2419

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

2420

" Zeroconf")

2421

2422

2075

# For convenience

2423

2076

debug = server_settings["debug"]

2424

2077

debuglevel = server_settings["debuglevel"]

2426

2079

use_ipv6 = server_settings["use_ipv6"]

2427

2080

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

2428

2081

stored_state_file)

2429

foreground = server_settings["foreground"]

2430

zeroconf = server_settings["zeroconf"]

2431

2082

2432

2083

if debug:

2433

2084

initlogger(debug, logging.DEBUG)

2440

2091

2441

2092

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

2442

2093

syslogger.setFormatter(logging.Formatter

2443

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

2444

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

2445

.format(server_settings

2446

["servicename"])))

2094

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

2095

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

2096

% server_settings["servicename"]))

2447

2097

2448

2098

# Parse config file with clients

2449

2099

client_config = configparser.SafeConfigParser(Client

2454

2104

global mandos_dbus_service

2455

2105

mandos_dbus_service = None

2456

2106

2457

socketfd = None

2458

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

2459

socketfd = server_settings["socket"]

2460

2107

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

2461

2108

server_settings["port"]),

2462

2109

ClientHandler,

2465

2112

use_ipv6=use_ipv6,

2466

2113

gnutls_priority=

2467

2114

server_settings["priority"],

2468

use_dbus=use_dbus,

2469

socketfd=socketfd)

2470

if not foreground:

2471

pidfilename = "/run/mandos.pid"

2472

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

2473

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

2474

pidfile = None

2115

use_dbus=use_dbus)

2116

if not debug:

2117

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

2475

2118

try:

2476

2119

pidfile = open(pidfilename, "w")

2477

except IOError as e:

2478

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

2479

exc_info=e)

2120

except IOError:

2121

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

2480

2122

2481

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

2123

try:

2124

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

2125

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

2126

except KeyError:

2482

2127

try:

2483

uid = pwd.getpwnam(name).pw_uid

2484

gid = pwd.getpwnam(name).pw_gid

2485

break

2128

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

2129

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

2486

2130

except KeyError:

2487

continue

2488

else:

2489

uid = 65534

2490

gid = 65534

2131

try:

2132

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

2133

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

2134

except KeyError:

2135

uid = 65534

2136

gid = 65534

2491

2137

try:

2492

2138

os.setgid(gid)

2493

2139

os.setuid(uid)

2494

2140

except OSError as error:

2495

if error.errno != errno.EPERM:

2496

raise

2141

if error[0] != errno.EPERM:

2142

raise error

2497

2143

2498

2144

if debug:

2499

2145

# Enable all possible GnuTLS debugging

2510

2156

.gnutls_global_set_log_function(debug_gnutls))

2511

2157

2512

2158

# Redirect stdin so all checkers get /dev/null

2513

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

2159

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

2514

2160

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

2515

2161

if null > 2:

2516

2162

os.close(null)

2517

2163

2518

2164

# Need to fork before connecting to D-Bus

2519

if not foreground:

2165

if not debug:

2520

2166

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

2521

2167

daemon()

2522

2168

2523

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

2524

# need to inform gobject that threads will be used.

2525

2169

gobject.threads_init()

2526

2170

2527

2171

global main_loop

2528

2172

# From the Avahi example code

2529

DBusGMainLoop(set_as_default=True)

2173

DBusGMainLoop(set_as_default=True )

2530

2174

main_loop = gobject.MainLoop()

2531

2175

bus = dbus.SystemBus()

2532

2176

# End of Avahi example code

2538

2182

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

2539

2183

do_not_queue=True))

2540

2184

except dbus.exceptions.NameExistsException as e:

2541

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

2185

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

2542

2186

use_dbus = False

2543

2187

server_settings["use_dbus"] = False

2544

2188

tcp_server.use_dbus = False

2545

if zeroconf:

2546

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2547

service = AvahiServiceToSyslog(name =

2548

server_settings["servicename"],

2549

servicetype = "_mandos._tcp",

2550

protocol = protocol, bus = bus)

2551

if server_settings["interface"]:

2552

service.interface = (if_nametoindex

2553

(server_settings["interface"]

2554

.encode("utf-8")))

2189

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2190

service = AvahiServiceToSyslog(name =

2191

server_settings["servicename"],

2192

servicetype = "_mandos._tcp",

2193

protocol = protocol, bus = bus)

2194

if server_settings["interface"]:

2195

service.interface = (if_nametoindex

2196

(str(server_settings["interface"])))

2555

2197

2556

2198

global multiprocessing_manager

2557

2199

multiprocessing_manager = multiprocessing.Manager()

2558

2200

2559

2201

client_class = Client

2560

2202

if use_dbus:

2561

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

2203

client_class = functools.partial(ClientDBusTransitional,

2204

bus = bus)

2562

2205

2563

2206

client_settings = Client.config_parser(client_config)

2564

2207

old_client_settings = {}

2565

2208

clients_data = {}

2566

2209

2567

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

2568

global wnull

2569

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

2570

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

2571

# mode

2572

if debug or not foreground:

2573

wnull.close()

2574

2575

2210

# Get client data and settings from last running state.

2576

2211

if server_settings["restore"]:

2577

2212

try:

2580

2215

(stored_state))

2581

2216

os.remove(stored_state_path)

2582

2217

except IOError as e:

2583

if e.errno == errno.ENOENT:

2584

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

2585

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

2586

else:

2587

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

2588

exc_info=e)

2218

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

2219

.format(e))

2220

if e.errno != errno.ENOENT:

2589

2221

raise

2590

2222

except EOFError as e:

2591

2223

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

2592

"EOFError:", exc_info=e)

2224

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

2593

2225

2594

2226

with PGPEngine() as pgp:

2595

for client_name, client in clients_data.items():

2596

# Skip removed clients

2597

if client_name not in client_settings:

2598

continue

2599

2227

for client_name, client in clients_data.iteritems():

2600

2228

# Decide which value to use after restoring saved state.

2601

2229

# We have three different values: Old config file,

2602

2230

# new config file, and saved state.

2623

2251

if datetime.datetime.utcnow() >= client["expires"]:

2624

2252

if not client["last_checked_ok"]:

2625

2253

logger.warning(

2626

"disabling client {} - Client never "

2254

"disabling client {0} - Client never "

2627

2255

"performed a successful checker"

2628

2256

.format(client_name))

2629

2257

client["enabled"] = False

2630

2258

elif client["last_checker_status"] != 0:

2631

2259

logger.warning(

2632

"disabling client {} - Client last"

2633

" checker failed with error code {}"

2260

"disabling client {0} - Client "

2261

"last checker failed with error code {1}"

2634

2262

.format(client_name,

2635

2263

client["last_checker_status"]))

2636

2264

client["enabled"] = False

2639

2267

.utcnow()

2640

2268

+ client["timeout"])

2641

2269

logger.debug("Last checker succeeded,"

2642

" keeping {} enabled"

2270

" keeping {0} enabled"

2643

2271

.format(client_name))

2644

2272

try:

2645

2273

client["secret"] = (

2648

2276

["secret"]))

2649

2277

except PGPError:

2650

2278

# If decryption fails, we use secret from new settings

2651

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

2279

logger.debug("Failed to decrypt {0} old secret"

2652

2280

.format(client_name))

2653

2281

client["secret"] = (

2654

2282

client_settings[client_name]["secret"])

2283

2655

2284

2656

2285

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

2657

2286

for client_name in (set(old_client_settings)

2660

2289

for client_name in (set(client_settings)

2661

2290

- set(old_client_settings)):

2662

2291

clients_data[client_name] = client_settings[client_name]

2663

2292

2664

2293

# Create all client objects

2665

for client_name, client in clients_data.items():

2294

for client_name, client in clients_data.iteritems():

2666

2295

tcp_server.clients[client_name] = client_class(

2667

name = client_name, settings = client,

2668

server_settings = server_settings)

2296

name = client_name, settings = client)

2669

2297

2670

2298

if not tcp_server.clients:

2671

2299

logger.warning("No clients defined")

2672

2673

if not foreground:

2674

if pidfile is not None:

2675

try:

2676

with pidfile:

2677

pid = os.getpid()

2678

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

2679

except IOError:

2680

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

2681

pidfilename, pid)

2682

del pidfile

2300

2301

if not debug:

2302

try:

2303

with pidfile:

2304

pid = os.getpid()

2305

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

2306

del pidfile

2307

except IOError:

2308

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

2309

pidfilename, pid)

2310

except NameError:

2311

# "pidfile" was never created

2312

pass

2683

2313

del pidfilename

2314

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

2684

2315

2685

2316

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

2686

2317

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

2687

2318

2688

2319

if use_dbus:

2689

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

2690

"se.bsnet.fukt.Mandos"})

2691

class MandosDBusService(DBusObjectWithProperties):

2320

class MandosDBusService(dbus.service.Object):

2692

2321

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

2693

2322

def __init__(self):

2694

2323

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

2695

2324

_interface = "se.recompile.Mandos"

2696

2325

2697

@dbus_interface_annotations(_interface)

2698

def _foo(self):

2699

return { "org.freedesktop.DBus.Property"

2700

".EmitsChangedSignal":

2701

"false"}

2702

2703

2326

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

2704

2327

def ClientAdded(self, objpath):

2705

2328

"D-Bus signal"

2727

2350

def GetAllClientsWithProperties(self):

2728

2351

"D-Bus method"

2729

2352

return dbus.Dictionary(

2730

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

2731

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

2353

((c.dbus_object_path, c.GetAll(""))

2354

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

2732

2355

signature="oa{sv}")

2733

2356

2734

2357

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

2747

2370

2748

2371

del _interface

2749

2372

2750

mandos_dbus_service = MandosDBusService()

2373

class MandosDBusServiceTransitional(MandosDBusService):

2374

__metaclass__ = AlternateDBusNamesMetaclass

2375

mandos_dbus_service = MandosDBusServiceTransitional()

2751

2376

2752

2377

def cleanup():

2753

2378

"Cleanup function; run on exit"

2754

if zeroconf:

2755

service.cleanup()

2379

service.cleanup()

2756

2380

2757

2381

multiprocessing.active_children()

2758

wnull.close()

2759

2382

if not (tcp_server.clients or client_settings):

2760

2383

return

2761

2384

2772

2395

2773

2396

# A list of attributes that can not be pickled

2774

2397

# + secret.

2775

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

2776

"checker", "server_settings" }

2398

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

2399

"checker"))

2777

2400

for name, typ in (inspect.getmembers

2778

2401

(dbus.service.Object)):

2779

2402

exclude.add(name)

2788

2411

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

2789

2412

2790

2413

try:

2791

with (tempfile.NamedTemporaryFile

2792

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

2793

dir=os.path.dirname(stored_state_path),

2794

delete=False)) as stored_state:

2414

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

2415

prefix="clients-",

2416

dir=os.path.dirname

2417

(stored_state_path))

2418

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

2795

2419

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

2796

tempname=stored_state.name

2797

2420

os.rename(tempname, stored_state_path)

2798

2421

except (IOError, OSError) as e:

2422

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

2423

.format(e))

2799

2424

if not debug:

2800

2425

try:

2801

2426

os.remove(tempname)

2802

2427

except NameError:

2803

2428

pass

2804

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

2805

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

2806

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

2807

else:

2808

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

2809

exc_info=e)

2810

raise

2429

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

2430

errno.EEXIST)):

2431

raise e

2811

2432

2812

2433

# Delete all clients, and settings from config

2813

2434

while tcp_server.clients:

2837

2458

tcp_server.server_activate()

2838

2459

2839

2460

# Find out what port we got

2840

if zeroconf:

2841

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

2461

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

2842

2462

if use_ipv6:

2843

2463

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

2844

" flowinfo %d, scope_id %d",

2845

*tcp_server.socket.getsockname())

2464

" flowinfo %d, scope_id %d"

2465

% tcp_server.socket.getsockname())

2846

2466

else: # IPv4

2847

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

2848

*tcp_server.socket.getsockname())

2467

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

2468

% tcp_server.socket.getsockname())

2849

2469

2850

2470

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

2851

2471

2852

2472

try:

2853

if zeroconf:

2854

# From the Avahi example code

2855

try:

2856

service.activate()

2857

except dbus.exceptions.DBusException as error:

2858

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

2859

cleanup()

2860

sys.exit(1)

2861

# End of Avahi example code

2473

# From the Avahi example code

2474

try:

2475

service.activate()

2476

except dbus.exceptions.DBusException as error:

2477

logger.critical("DBusException: %s", error)

2478

cleanup()

2479

sys.exit(1)

2480

# End of Avahi example code

2862

2481

2863

2482

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

2864

2483

lambda *args, **kwargs:

2868

2487

logger.debug("Starting main loop")

2869

2488

main_loop.run()

2870

2489

except AvahiError as error:

2871

logger.critical("Avahi Error", exc_info=error)

2490

logger.critical("AvahiError: %s", error)

2872

2491

cleanup()

2873

2492

sys.exit(1)

2874

2493

except KeyboardInterrupt: