/mandos/trunk : revision 504

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

28

# along with this program. If not, see

29

# <http://www.gnu.org/licenses/>.

30

#

31

# Contact the authors at <mandos@recompile.se>.

31

# Contact the authors at <mandos@fukt.bsnet.se>.

32

#

33

34

from __future__ import (division, absolute_import, print_function,

62

import functools

63

import cPickle as pickle

64

import multiprocessing

65

import types

66

import binascii

67

import tempfile

68

import itertools

69

65

70

66

import dbus

71

67

import dbus.service

76

72

import ctypes.util

77

73

import xml.dom.minidom

78

74

import inspect

79

import GnuPGInterface

80

75

81

76

try:

82

77

SO_BINDTODEVICE = socket.SO_BINDTODEVICE

86

81

except ImportError:

87

82

SO_BINDTODEVICE = None

88

83

89

version = "1.5.3"

90

stored_state_file = "clients.pickle"

91

92

logger = logging.getLogger()

84

85

version = "1.3.1"

86

87

#logger = logging.getLogger('mandos')

88

logger = logging.Logger('mandos')

93

89

syslogger = (logging.handlers.SysLogHandler

94

90

(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

95

91

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

96

97

try:

98

if_nametoindex = (ctypes.cdll.LoadLibrary

99

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

100

.if_nametoindex)

101

except (OSError, AttributeError):

102

def if_nametoindex(interface):

103

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

104

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

105

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

106

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

107

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

108

interface))

109

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

110

ifreq[16:20])[0]

111

return interface_index

112

113

114

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

115

"""init logger and add loglevel"""

116

117

syslogger.setFormatter(logging.Formatter

118

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

119

' %(message)s'))

120

logger.addHandler(syslogger)

121

122

if debug:

123

console = logging.StreamHandler()

124

console.setFormatter(logging.Formatter('%(asctime)s %(name)s'

125

' [%(process)d]:'

126

' %(levelname)s:'

127

' %(message)s'))

128

logger.addHandler(console)

129

logger.setLevel(level)

130

131

132

class PGPError(Exception):

133

"""Exception if encryption/decryption fails"""

134

pass

135

136

137

class PGPEngine(object):

138

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

139

def __init__(self):

140

self.gnupg = GnuPGInterface.GnuPG()

141

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'])

148

149

def __enter__(self):

150

return self

151

152

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

153

self._cleanup()

154

return False

155

156

def __del__(self):

157

self._cleanup()

158

159

def _cleanup(self):

160

if self.tempdir is not None:

161

# Delete contents of tempdir

162

for root, dirs, files in os.walk(self.tempdir,

163

topdown = False):

164

for filename in files:

165

os.remove(os.path.join(root, filename))

166

for dirname in dirs:

167

os.rmdir(os.path.join(root, dirname))

168

# Remove tempdir

169

os.rmdir(self.tempdir)

170

self.tempdir = None

171

172

def password_encode(self, password):

173

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

174

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

175

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

176

177

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

192

return ciphertext

193

194

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

209

return decrypted_plaintext

210

211

92

syslogger.setFormatter(logging.Formatter

93

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

94

' %(message)s'))

95

logger.addHandler(syslogger)

96

97

console = logging.StreamHandler()

98

console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'

99

' %(levelname)s:'

100

' %(message)s'))

101

logger.addHandler(console)

212

102

213

103

class AvahiError(Exception):

214

104

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

269

159

" after %i retries, exiting.",

270

160

self.rename_count)

271

161

raise AvahiServiceError("Too many renames")

272

self.name = unicode(self.server

273

.GetAlternativeServiceName(self.name))

162

self.name = unicode(self.server.GetAlternativeServiceName(self.name))

274

163

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

275

164

self.name)

165

syslogger.setFormatter(logging.Formatter

166

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

167

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

168

% self.name))

276

169

self.remove()

277

170

try:

278

171

self.add()

279

172

except dbus.exceptions.DBusException as error:

280

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

173

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

281

174

self.cleanup()

282

175

os._exit(1)

283

176

self.rename_count += 1

298

191

avahi.DBUS_INTERFACE_ENTRY_GROUP)

299

192

self.entry_group_state_changed_match = (

300

193

self.group.connect_to_signal(

301

'StateChanged', self.entry_group_state_changed))

194

'StateChanged', self .entry_group_state_changed))

302

195

logger.debug("Adding Zeroconf service '%s' of type '%s' ...",

303

196

self.name, self.type)

304

197

self.group.AddService(

330

223

try:

331

224

self.group.Free()

332

225

except (dbus.exceptions.UnknownMethodException,

333

dbus.exceptions.DBusException):

226

dbus.exceptions.DBusException) as e:

334

227

pass

335

228

self.group = None

336

229

self.remove()

370

263

self.server_state_changed)

371

264

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

372

265

373

class AvahiServiceToSyslog(AvahiService):

374

def rename(self):

375

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

376

ret = AvahiService.rename(self)

377

syslogger.setFormatter(logging.Formatter

378

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

379

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

380

% self.name))

381

return ret

382

266

383

def timedelta_to_milliseconds(td):

267

def _timedelta_to_milliseconds(td):

384

268

"Convert a datetime.timedelta() to milliseconds"

385

269

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

386

270

+ (td.seconds * 1000)

390

274

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

391

275

392

276

Attributes:

393

approved: bool(); 'None' if not yet approved/disapproved

277

_approved: bool(); 'None' if not yet approved/disapproved

394

278

approval_delay: datetime.timedelta(); Time to wait for approval

395

279

approval_duration: datetime.timedelta(); Duration of one approval

396

280

checker: subprocess.Popen(); a running checker process used

403

287

instance %(name)s can be used in the command.

404

288

checker_initiator_tag: a gobject event source tag, or None

405

289

created: datetime.datetime(); (UTC) object creation

406

client_structure: Object describing what attributes a client has

407

and is used for storing the client at exit

408

290

current_checker_command: string; current running checker_command

291

disable_hook: If set, called by disable() as disable_hook(self)

409

292

disable_initiator_tag: a gobject event source tag, or None

410

293

enabled: bool()

411

294

fingerprint: string (40 or 32 hexadecimal digits); used to

414

297

interval: datetime.timedelta(); How often to start a new checker

415

298

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

416

299

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

417

last_checker_status: integer between 0 and 255 reflecting exit

418

status of last checker. -1 reflects crashed

419

checker, -2 means no checker completed yet.

420

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

300

last_enabled: datetime.datetime(); (UTC)

421

301

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

422

302

D-Bus identifiers

423

303

secret: bytestring; sent verbatim (over TLS) to client

424

304

timeout: datetime.timedelta(); How long from last_checked_ok

425

305

until this client is disabled

426

extended_timeout: extra long timeout when secret has been sent

306

extended_timeout: extra long timeout when password has been sent

427

307

runtime_expansions: Allowed attributes for runtime expansion.

428

308

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

429

309

disabled, or None

433

313

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

434

314

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

435

315

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

436

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

437

"extended_timeout": "15m",

438

"interval": "2m",

439

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

440

"host": "",

441

"approval_delay": "0s",

442

"approval_duration": "1s",

443

"approved_by_default": "True",

444

"enabled": "True",

445

}

446

316

447

317

def timeout_milliseconds(self):

448

318

"Return the 'timeout' attribute in milliseconds"

449

return timedelta_to_milliseconds(self.timeout)

319

return _timedelta_to_milliseconds(self.timeout)

450

320

451

321

def extended_timeout_milliseconds(self):

452

322

"Return the 'extended_timeout' attribute in milliseconds"

453

return timedelta_to_milliseconds(self.extended_timeout)

323

return _timedelta_to_milliseconds(self.extended_timeout)

454

324

455

325

def interval_milliseconds(self):

456

326

"Return the 'interval' attribute in milliseconds"

457

return timedelta_to_milliseconds(self.interval)

327

return _timedelta_to_milliseconds(self.interval)

458

328

459

329

def approval_delay_milliseconds(self):

460

return timedelta_to_milliseconds(self.approval_delay)

461

462

@staticmethod

463

def config_parser(config):

464

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

465

{ client_name: {setting_name: value, ...}, ...}

466

with exceptions for any special settings as defined above.

467

NOTE: Must be a pure function. Must return the same result

468

value given the same arguments.

469

"""

470

settings = {}

471

for client_name in config.sections():

472

section = dict(config.items(client_name))

473

client = settings[client_name] = {}

474

475

client["host"] = section["host"]

476

# Reformat values from string types to Python types

477

client["approved_by_default"] = config.getboolean(

478

client_name, "approved_by_default")

479

client["enabled"] = config.getboolean(client_name,

480

"enabled")

481

482

client["fingerprint"] = (section["fingerprint"].upper()

483

.replace(" ", ""))

484

if "secret" in section:

485

client["secret"] = section["secret"].decode("base64")

486

elif "secfile" in section:

487

with open(os.path.expanduser(os.path.expandvars

488

(section["secfile"])),

489

"rb") as secfile:

490

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

491

else:

492

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

493

% section)

494

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

495

client["extended_timeout"] = string_to_delta(

496

section["extended_timeout"])

497

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

498

client["approval_delay"] = string_to_delta(

499

section["approval_delay"])

500

client["approval_duration"] = string_to_delta(

501

section["approval_duration"])

502

client["checker_command"] = section["checker"]

503

client["last_approval_request"] = None

504

client["last_checked_ok"] = None

505

client["last_checker_status"] = -2

506

507

return settings

508

509

510

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

330

return _timedelta_to_milliseconds(self.approval_delay)

331

332

def __init__(self, name = None, disable_hook=None, config=None):

511

333

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

512

334

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

513

335

attribute."""

514

336

self.name = name

515

# adding all client settings

516

for setting, value in settings.iteritems():

517

setattr(self, setting, value)

518

519

if self.enabled:

520

if not hasattr(self, "last_enabled"):

521

self.last_enabled = datetime.datetime.utcnow()

522

if not hasattr(self, "expires"):

523

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

524

+ self.timeout)

525

else:

526

self.last_enabled = None

527

self.expires = None

528

337

if config is None:

338

config = {}

529

339

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

530

340

# Uppercase and remove spaces from fingerprint for later

531

341

# comparison purposes with return value from the fingerprint()

532

342

# function

343

self.fingerprint = (config["fingerprint"].upper()

344

.replace(" ", ""))

533

345

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

534

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

535

datetime.datetime.utcnow())

536

537

# attributes specific for this server instance

346

if "secret" in config:

347

self.secret = config["secret"].decode("base64")

348

elif "secfile" in config:

349

with open(os.path.expanduser(os.path.expandvars

350

(config["secfile"])),

351

"rb") as secfile:

352

self.secret = secfile.read()

353

else:

354

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

355

% self.name)

356

self.host = config.get("host", "")

357

self.created = datetime.datetime.utcnow()

358

self.enabled = False

359

self.last_approval_request = None

360

self.last_enabled = None

361

self.last_checked_ok = None

362

self.timeout = string_to_delta(config["timeout"])

363

self.extended_timeout = string_to_delta(config["extended_timeout"])

364

self.interval = string_to_delta(config["interval"])

365

self.disable_hook = disable_hook

538

366

self.checker = None

539

367

self.checker_initiator_tag = None

540

368

self.disable_initiator_tag = None

369

self.expires = None

541

370

self.checker_callback_tag = None

371

self.checker_command = config["checker"]

542

372

self.current_checker_command = None

543

self.approved = None

373

self.last_connect = None

374

self._approved = None

375

self.approved_by_default = config.get("approved_by_default",

376

True)

544

377

self.approvals_pending = 0

545

self.changedstate = (multiprocessing_manager

546

.Condition(multiprocessing_manager

547

.Lock()))

548

self.client_structure = [attr for attr in

549

self.__dict__.iterkeys()

550

if not attr.startswith("_")]

551

self.client_structure.append("client_structure")

552

553

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

554

lambda obj:

555

isinstance(obj,

556

property)):

557

if not name.startswith("_"):

558

self.client_structure.append(name)

378

self.approval_delay = string_to_delta(

379

config["approval_delay"])

380

self.approval_duration = string_to_delta(

381

config["approval_duration"])

382

self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())

559

383

560

# Send notice to process children that client state has changed

561

384

def send_changedstate(self):

562

with self.changedstate:

563

self.changedstate.notify_all()

564

385

self.changedstate.acquire()

386

self.changedstate.notify_all()

387

self.changedstate.release()

388

565

389

def enable(self):

566

390

"""Start this client's checker and timeout hooks"""

567

391

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

568

392

# Already enabled

569

393

return

570

394

self.send_changedstate()

395

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

396

# and every interval from then on.

397

self.checker_initiator_tag = (gobject.timeout_add

398

(self.interval_milliseconds(),

399

self.start_checker))

400

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

571

401

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

402

self.disable_initiator_tag = (gobject.timeout_add

403

(self.timeout_milliseconds(),

404

self.disable))

572

405

self.enabled = True

573

406

self.last_enabled = datetime.datetime.utcnow()

574

self.init_checker()

407

# Also start a new checker *right now*.

408

self.start_checker()

575

409

576

410

def disable(self, quiet=True):

577

411

"""Disable this client."""

589

423

gobject.source_remove(self.checker_initiator_tag)

590

424

self.checker_initiator_tag = None

591

425

self.stop_checker()

426

if self.disable_hook:

427

self.disable_hook(self)

592

428

self.enabled = False

593

429

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

594

430

return False

595

431

596

432

def __del__(self):

433

self.disable_hook = None

597

434

self.disable()

598

435

599

def init_checker(self):

600

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

601

# and every interval from then on.

602

self.checker_initiator_tag = (gobject.timeout_add

603

(self.interval_milliseconds(),

604

self.start_checker))

605

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

606

self.disable_initiator_tag = (gobject.timeout_add

607

(self.timeout_milliseconds(),

608

self.disable))

609

# Also start a new checker *right now*.

610

self.start_checker()

611

612

436

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

613

437

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

614

438

self.checker_callback_tag = None

615

439

self.checker = None

616

440

if os.WIFEXITED(condition):

617

self.last_checker_status = os.WEXITSTATUS(condition)

618

if self.last_checker_status == 0:

441

exitstatus = os.WEXITSTATUS(condition)

442

if exitstatus == 0:

619

443

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

620

444

vars(self))

621

445

self.checked_ok()

623

447

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

624

448

vars(self))

625

449

else:

626

self.last_checker_status = -1

627

450

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

628

451

vars(self))

629

452

630

def checked_ok(self):

631

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

632

self.last_checked_ok = datetime.datetime.utcnow()

633

self.last_checker_status = 0

634

self.bump_timeout()

635

636

def bump_timeout(self, timeout=None):

637

"""Bump up the timeout for this client."""

453

def checked_ok(self, timeout=None):

454

"""Bump up the timeout for this client.

455

456

This should only be called when the client has been seen,

457

alive and well.

458

"""

638

459

if timeout is None:

639

460

timeout = self.timeout

640

if self.disable_initiator_tag is not None:

641

gobject.source_remove(self.disable_initiator_tag)

642

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

643

self.disable_initiator_tag = (gobject.timeout_add

644

(timedelta_to_milliseconds

645

(timeout), self.disable))

646

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

461

self.last_checked_ok = datetime.datetime.utcnow()

462

gobject.source_remove(self.disable_initiator_tag)

463

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

464

self.disable_initiator_tag = (gobject.timeout_add

465

(_timedelta_to_milliseconds(timeout),

466

self.disable))

647

467

648

468

def need_approval(self):

649

469

self.last_approval_request = datetime.datetime.utcnow()

693

513

try:

694

514

command = self.checker_command % escaped_attrs

695

515

except TypeError as error:

696

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

697

self.checker_command, exc_info=error)

516

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

517

' %s', self.checker_command, error)

698

518

return True # Try again later

699

519

self.current_checker_command = command

700

520

try:

718

538

gobject.source_remove(self.checker_callback_tag)

719

539

self.checker_callback(pid, status, command)

720

540

except OSError as error:

721

logger.error("Failed to start subprocess",

722

exc_info=error)

541

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

542

error)

723

543

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

724

544

return True

725

545

732

552

return

733

553

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

734

554

try:

735

self.checker.terminate()

555

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

736

556

#time.sleep(0.5)

737

557

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

738

# self.checker.kill()

558

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

739

559

except OSError as error:

740

560

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

741

561

raise

772

592

return decorator

773

593

774

594

775

def dbus_interface_annotations(dbus_interface):

776

"""Decorator for marking functions returning interface annotations.

777

778

Usage:

779

780

@dbus_interface_annotations("org.example.Interface")

781

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

782

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

783

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

784

"false"}

785

"""

786

def decorator(func):

787

func._dbus_is_interface = True

788

func._dbus_interface = dbus_interface

789

func._dbus_name = dbus_interface

790

return func

791

return decorator

792

793

794

def dbus_annotations(annotations):

795

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

796

Usage:

797

798

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

799

access="r")

800

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

801

"org.freedesktop.DBus.Property."

802

"EmitsChangedSignal": "false"})

803

def Property_dbus_property(self):

804

return dbus.Boolean(False)

805

"""

806

def decorator(func):

807

func._dbus_annotations = annotations

808

return func

809

return decorator

810

811

812

595

class DBusPropertyException(dbus.exceptions.DBusException):

813

596

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

814

597

"""

837

620

"""

838

621

839

622

@staticmethod

840

def _is_dbus_thing(thing):

841

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

842

843

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

844

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

845

"""

846

return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),

847

False)

623

def _is_dbus_property(obj):

624

return getattr(obj, "_dbus_is_property", False)

848

625

849

def _get_all_dbus_things(self, thing):

626

def _get_all_dbus_properties(self):

850

627

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

851

628

"""

852

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

853

name),

854

athing.__get__(self))

855

for cls in self.__class__.__mro__

856

for name, athing in

857

inspect.getmembers(cls,

858

self._is_dbus_thing(thing)))

629

return ((prop._dbus_name, prop)

630

for name, prop in

631

inspect.getmembers(self, self._is_dbus_property))

859

632

860

633

def _get_dbus_property(self, interface_name, property_name):

861

634

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

862

635

property with the specified name and interface.

863

636

"""

864

for cls in self.__class__.__mro__:

865

for name, value in (inspect.getmembers

866

(cls,

867

self._is_dbus_thing("property"))):

868

if (value._dbus_name == property_name

869

and value._dbus_interface == interface_name):

870

return value.__get__(self)

871

637

for name in (property_name,

638

property_name + "_dbus_property"):

639

prop = getattr(self, name, None)

640

if (prop is None

641

or not self._is_dbus_property(prop)

642

or prop._dbus_name != property_name

643

or (interface_name and prop._dbus_interface

644

and interface_name != prop._dbus_interface)):

645

continue

646

return prop

872

647

# No such property

873

648

raise DBusPropertyNotFound(self.dbus_object_path + ":"

874

649

+ interface_name + "."

899

674

# signatures other than "ay".

900

675

if prop._dbus_signature != "ay":

901

676

raise ValueError

902

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

903

for byte in value))

677

value = dbus.ByteArray(''.join(unichr(byte)

678

for byte in value))

904

679

prop(value)

905

680

906

681

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

911

686

912

687

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

913

688

"""

914

properties = {}

915

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

689

all = {}

690

for name, prop in self._get_all_dbus_properties():

916

691

if (interface_name

917

692

and interface_name != prop._dbus_interface):

918

693

# Interface non-empty but did not match

922

697

continue

923

698

value = prop()

924

699

if not hasattr(value, "variant_level"):

925

properties[name] = value

700

all[name] = value

926

701

continue

927

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

928

value.variant_level+1)

929

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

702

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

703

value.variant_level+1)

704

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

930

705

931

706

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

932

707

out_signature="s",

933

708

path_keyword='object_path',

934

709

connection_keyword='connection')

935

710

def Introspect(self, object_path, connection):

936

"""Overloading of standard D-Bus method.

937

938

Inserts property tags and interface annotation tags.

711

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

939

712

"""

940

713

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

941

714

connection)

948

721

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

949

722

return e

950

723

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

951

# Add property tags

952

724

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

953

725

for name, prop

954

in self._get_all_dbus_things("property")

726

in self._get_all_dbus_properties()

955

727

if prop._dbus_interface

956

728

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

957

729

if_tag.appendChild(tag)

958

# Add annotation tags

959

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

960

for tag in if_tag.getElementsByTagName(typ):

961

annots = dict()

962

for name, prop in (self.

963

_get_all_dbus_things(typ)):

964

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

965

and prop._dbus_interface

966

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

967

annots.update(getattr

968

(prop,

969

"_dbus_annotations",

970

{}))

971

for name, value in annots.iteritems():

972

ann_tag = document.createElement(

973

"annotation")

974

ann_tag.setAttribute("name", name)

975

ann_tag.setAttribute("value", value)

976

tag.appendChild(ann_tag)

977

# Add interface annotation tags

978

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():

985

ann_tag = document.createElement("annotation")

986

ann_tag.setAttribute("name", annotation)

987

ann_tag.setAttribute("value", value)

988

if_tag.appendChild(ann_tag)

989

730

# Add the names to the return values for the

990

731

# "org.freedesktop.DBus.Properties" methods

991

732

if (if_tag.getAttribute("name")

1006

747

except (AttributeError, xml.dom.DOMException,

1007

748

xml.parsers.expat.ExpatError) as error:

1008

749

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

1009

exc_info=error)

750

error)

1010

751

return xmlstring

1011

752

1012

753

1018

759

variant_level=variant_level)

1019

760

1020

761

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.

1025

"""

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):

1034

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

1035

# with the wrong interface name

1036

if (not hasattr(attribute, "_dbus_interface")

1037

or not attribute._dbus_interface

1038

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

1039

continue

1040

# Create an alternate D-Bus interface name based on

1041

# the current name

1042

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)

1047

# Is this a D-Bus signal?

1048

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

1049

# Extract the original non-method function by

1050

# black magic

1051

nonmethod_func = (dict(

1052

zip(attribute.func_code.co_freevars,

1053

attribute.__closure__))["func"]

1054

.cell_contents)

1055

# Create a new, but exactly alike, function

1056

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

1057

# with the alternate D-Bus interface name

1058

new_function = (dbus.service.signal

1059

(alt_interface,

1060

attribute._dbus_signature)

1061

(types.FunctionType(

1062

nonmethod_func.func_code,

1063

nonmethod_func.func_globals,

1064

nonmethod_func.func_name,

1065

nonmethod_func.func_defaults,

1066

nonmethod_func.func_closure)))

1067

# Copy annotations, if any

1068

try:

1069

new_function._dbus_annotations = (

1070

dict(attribute._dbus_annotations))

1071

except AttributeError:

1072

pass

1073

# 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

1076

def fixscope(func1, func2):

1077

"""This function is a scope container to pass

1078

func1 and func2 to the "call_both" function

1079

outside of its arguments"""

1080

def call_both(*args, **kwargs):

1081

"""This function will emit two D-Bus

1082

signals by calling func1 and func2"""

1083

func1(*args, **kwargs)

1084

func2(*args, **kwargs)

1085

return call_both

1086

# Create the "call_both" function and add it to

1087

# the class

1088

attr[attrname] = fixscope(attribute,

1089

new_function)

1090

# Is this a D-Bus method?

1091

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

1092

# Create a new, but exactly alike, function

1093

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

1094

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

1095

# to the class.

1096

attr[attrname] = (dbus.service.method

1097

(alt_interface,

1098

attribute._dbus_in_signature,

1099

attribute._dbus_out_signature)

1100

(types.FunctionType

1101

(attribute.func_code,

1102

attribute.func_globals,

1103

attribute.func_name,

1104

attribute.func_defaults,

1105

attribute.func_closure)))

1106

# Copy annotations, if any

1107

try:

1108

attr[attrname]._dbus_annotations = (

1109

dict(attribute._dbus_annotations))

1110

except AttributeError:

1111

pass

1112

# Is this a D-Bus property?

1113

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

1114

# Create a new, but exactly alike, function

1115

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

1116

# property with the alternate D-Bus interface

1117

# name. Add it to the class.

1118

attr[attrname] = (dbus_service_property

1119

(alt_interface,

1120

attribute._dbus_signature,

1121

attribute._dbus_access,

1122

attribute

1123

._dbus_get_args_options

1124

["byte_arrays"])

1125

(types.FunctionType

1126

(attribute.func_code,

1127

attribute.func_globals,

1128

attribute.func_name,

1129

attribute.func_defaults,

1130

attribute.func_closure)))

1131

# Copy annotations, if any

1132

try:

1133

attr[attrname]._dbus_annotations = (

1134

dict(attribute._dbus_annotations))

1135

except AttributeError:

1136

pass

1137

# Is this a D-Bus interface?

1138

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

1139

# Create a new, but exactly alike, function

1140

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

1141

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

1142

# to the class.

1143

attr[attrname] = (dbus_interface_annotations

1144

(alt_interface)

1145

(types.FunctionType

1146

(attribute.func_code,

1147

attribute.func_globals,

1148

attribute.func_name,

1149

attribute.func_defaults,

1150

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

1166

762

class ClientDBus(Client, DBusObjectWithProperties):

1167

763

"""A Client class using D-Bus

1168

764

1177

773

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

1178

774

1179

775

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

776

self._approvals_pending = 0

1180

777

self.bus = bus

1181

778

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

1182

779

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

1192

789

def notifychangeproperty(transform_func,

1193

790

dbus_name, type_func=lambda x: x,

1194

791

variant_level=1):

1195

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

1196

its changes to DBus.

1197

1198

transform_fun: Function that takes a value and a variant_level

1199

and transforms it to a D-Bus type.

1200

dbus_name: D-Bus name of the variable

792

""" Modify a variable so that its a property that announce its

793

changes to DBus.

794

transform_fun: Function that takes a value and transform it to

795

DBus type.

796

dbus_name: DBus name of the variable

1201

797

type_func: Function that transform the value before sending it

1202

to the D-Bus. Default: no transform

1203

variant_level: D-Bus variant level. Default: 1

798

to DBus

799

variant_level: DBus variant level. default: 1

1204

800

"""

1205

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

801

real_value = [None,]

1206

802

def setter(self, value):

803

old_value = real_value[0]

804

real_value[0] = value

1207

805

if hasattr(self, "dbus_object_path"):

1208

if (not hasattr(self, attrname) or

1209

type_func(getattr(self, attrname, None))

1210

!= type_func(value)):

1211

dbus_value = transform_func(type_func(value),

1212

variant_level

1213

=variant_level)

806

if type_func(old_value) != type_func(real_value[0]):

807

dbus_value = transform_func(type_func(real_value[0]),

808

variant_level)

1214

809

self.PropertyChanged(dbus.String(dbus_name),

1215

810

dbus_value)

1216

setattr(self, attrname, value)

1217

811

1218

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

812

return property(lambda self: real_value[0], setter)

1219

813

1220

814

1221

815

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1226

820

last_enabled = notifychangeproperty(datetime_to_dbus,

1227

821

"LastEnabled")

1228

822

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

1229

type_func = lambda checker:

1230

checker is not None)

823

type_func = lambda checker: checker is not None)

1231

824

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1232

825

"LastCheckedOK")

1233

last_checker_status = notifychangeproperty(dbus.Int16,

1234

"LastCheckerStatus")

1235

last_approval_request = notifychangeproperty(

1236

datetime_to_dbus, "LastApprovalRequest")

826

last_approval_request = notifychangeproperty(datetime_to_dbus,

827

"LastApprovalRequest")

1237

828

approved_by_default = notifychangeproperty(dbus.Boolean,

1238

829

"ApprovedByDefault")

1239

approval_delay = notifychangeproperty(dbus.UInt64,

1240

"ApprovalDelay",

1241

type_func =

1242

timedelta_to_milliseconds)

1243

approval_duration = notifychangeproperty(

1244

dbus.UInt64, "ApprovalDuration",

1245

type_func = timedelta_to_milliseconds)

830

approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",

831

type_func = _timedelta_to_milliseconds)

832

approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",

833

type_func = _timedelta_to_milliseconds)

1246

834

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

1247

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

1248

type_func =

1249

timedelta_to_milliseconds)

1250

extended_timeout = notifychangeproperty(

1251

dbus.UInt64, "ExtendedTimeout",

1252

type_func = timedelta_to_milliseconds)

1253

interval = notifychangeproperty(dbus.UInt64,

1254

"Interval",

1255

type_func =

1256

timedelta_to_milliseconds)

835

timeout = notifychangeproperty(dbus.UInt16, "Timeout",

836

type_func = _timedelta_to_milliseconds)

837

extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",

838

type_func = _timedelta_to_milliseconds)

839

interval = notifychangeproperty(dbus.UInt16, "Interval",

840

type_func = _timedelta_to_milliseconds)

1257

841

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

1258

842

1259

843

del notifychangeproperty

1301

885

return r

1302

886

1303

887

def _reset_approved(self):

1304

self.approved = None

888

self._approved = None

1305

889

return False

1306

890

1307

891

def approve(self, value=True):

1308

892

self.send_changedstate()

1309

self.approved = value

1310

gobject.timeout_add(timedelta_to_milliseconds

893

self._approved = value

894

gobject.timeout_add(_timedelta_to_milliseconds

1311

895

(self.approval_duration),

1312

896

self._reset_approved)

1313

897

1314

898

1315

899

## D-Bus methods, signals & properties

1316

_interface = "se.recompile.Mandos.Client"

1317

1318

## Interfaces

1319

1320

@dbus_interface_annotations(_interface)

1321

def _foo(self):

1322

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

1323

"false"}

900

_interface = "se.bsnet.fukt.Mandos.Client"

1324

901

1325

902

## Signals

1326

903

1426

1003

access="readwrite")

1427

1004

def ApprovalDuration_dbus_property(self, value=None):

1428

1005

if value is None: # get

1429

return dbus.UInt64(timedelta_to_milliseconds(

1006

return dbus.UInt64(_timedelta_to_milliseconds(

1430

1007

self.approval_duration))

1431

1008

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

1432

1009

1446

1023

def Host_dbus_property(self, value=None):

1447

1024

if value is None: # get

1448

1025

return dbus.String(self.host)

1449

self.host = unicode(value)

1026

self.host = value

1450

1027

1451

1028

# Created - property

1452

1029

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

1453

1030

def Created_dbus_property(self):

1454

return datetime_to_dbus(self.created)

1031

return dbus.String(datetime_to_dbus(self.created))

1455

1032

1456

1033

# LastEnabled - property

1457

1034

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

1478

1055

return

1479

1056

return datetime_to_dbus(self.last_checked_ok)

1480

1057

1481

# LastCheckerStatus - property

1482

@dbus_service_property(_interface, signature="n",

1483

access="read")

1484

def LastCheckerStatus_dbus_property(self):

1485

return dbus.Int16(self.last_checker_status)

1486

1487

1058

# Expires - property

1488

1059

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

1489

1060

def Expires_dbus_property(self):

1501

1072

if value is None: # get

1502

1073

return dbus.UInt64(self.timeout_milliseconds())

1503

1074

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

1075

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

1076

return

1504

1077

# Reschedule timeout

1505

if self.enabled:

1506

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:

1510

# The timeout has passed

1511

self.disable()

1512

else:

1513

self.expires = (now +

1514

datetime.timedelta(milliseconds =

1515

time_to_die))

1516

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

1517

is None):

1518

return

1519

gobject.source_remove(self.disable_initiator_tag)

1520

self.disable_initiator_tag = (gobject.timeout_add

1521

(time_to_die,

1522

self.disable))

1078

gobject.source_remove(self.disable_initiator_tag)

1079

self.disable_initiator_tag = None

1080

self.expires = None

1081

time_to_die = (self.

1082

_timedelta_to_milliseconds((self

1083

.last_checked_ok

1084

+ self.timeout)

1085

- datetime.datetime

1086

.utcnow()))

1087

if time_to_die <= 0:

1088

# The timeout has passed

1089

self.disable()

1090

else:

1091

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

1092

+ datetime.timedelta(milliseconds = time_to_die))

1093

self.disable_initiator_tag = (gobject.timeout_add

1094

(time_to_die, self.disable))

1523

1095

1524

1096

# ExtendedTimeout - property

1525

1097

@dbus_service_property(_interface, signature="t",

1538

1110

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

1539

1111

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

1540

1112

return

1541

if self.enabled:

1542

# Reschedule checker run

1543

gobject.source_remove(self.checker_initiator_tag)

1544

self.checker_initiator_tag = (gobject.timeout_add

1545

(value, self.start_checker))

1546

self.start_checker() # Start one now, too

1113

# Reschedule checker run

1114

gobject.source_remove(self.checker_initiator_tag)

1115

self.checker_initiator_tag = (gobject.timeout_add

1116

(value, self.start_checker))

1117

self.start_checker() # Start one now, too

1547

1118

1548

1119

# Checker - property

1549

1120

@dbus_service_property(_interface, signature="s",

1551

1122

def Checker_dbus_property(self, value=None):

1552

1123

if value is None: # get

1553

1124

return dbus.String(self.checker_command)

1554

self.checker_command = unicode(value)

1125

self.checker_command = value

1555

1126

1556

1127

# CheckerRunning - property

1557

1128

@dbus_service_property(_interface, signature="b",

1586

1157

raise KeyError()

1587

1158

1588

1159

def __getattribute__(self, name):

1589

if name == '_pipe':

1160

if(name == '_pipe'):

1590

1161

return super(ProxyClient, self).__getattribute__(name)

1591

1162

self._pipe.send(('getattr', name))

1592

1163

data = self._pipe.recv()

1599

1170

return func

1600

1171

1601

1172

def __setattr__(self, name, value):

1602

if name == '_pipe':

1173

if(name == '_pipe'):

1603

1174

return super(ProxyClient, self).__setattr__(name, value)

1604

1175

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

1605

1176

1606

1177

1607

class ClientDBusTransitional(ClientDBus):

1608

__metaclass__ = AlternateDBusNamesMetaclass

1609

1610

1611

1178

class ClientHandler(socketserver.BaseRequestHandler, object):

1612

1179

"""A class to handle client connections.

1613

1180

1692

1259

client.name)

1693

1260

if self.server.use_dbus:

1694

1261

# Emit D-Bus signal

1695

client.Rejected("Disabled")

1262

client.Rejected("Disabled")

1696

1263

return

1697

1264

1698

if client.approved or not client.approval_delay:

1265

if client._approved or not client.approval_delay:

1699

1266

#We are approved or approval is disabled

1700

1267

break

1701

elif client.approved is None:

1268

elif client._approved is None:

1702

1269

logger.info("Client %s needs approval",

1703

1270

client.name)

1704

1271

if self.server.use_dbus:

1715

1282

return

1716

1283

1717

1284

#wait until timeout or approved

1285

#x = float(client._timedelta_to_milliseconds(delay))

1718

1286

time = datetime.datetime.now()

1719

1287

client.changedstate.acquire()

1720

(client.changedstate.wait

1721

(float(client.timedelta_to_milliseconds(delay)

1722

/ 1000)))

1288

client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))

1723

1289

client.changedstate.release()

1724

1290

time2 = datetime.datetime.now()

1725

1291

if (time2 - time) >= delay:

1749

1315

sent_size += sent

1750

1316

1751

1317

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

1752

# bump the timeout using extended_timeout

1753

client.bump_timeout(client.extended_timeout)

1318

# bump the timeout as if seen

1319

client.checked_ok(client.extended_timeout)

1754

1320

if self.server.use_dbus:

1755

1321

# Emit D-Bus signal

1756

1322

client.GotSecret()

1823

1389

# Convert the buffer to a Python bytestring

1824

1390

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

1825

1391

# Convert the bytestring to hexadecimal notation

1826

hex_fpr = binascii.hexlify(fpr).upper()

1392

hex_fpr = ''.join("%02X" % ord(char) for char in fpr)

1827

1393

return hex_fpr

1828

1394

1829

1395

1832

1398

def sub_process_main(self, request, address):

1833

1399

try:

1834

1400

self.finish_request(request, address)

1835

except Exception:

1401

except:

1836

1402

self.handle_error(request, address)

1837

1403

self.close_request(request)

1838

1404

1839

1405

def process_request(self, request, address):

1840

1406

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

1841

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

1842

args = (request,

1843

address))

1844

proc.start()

1845

return proc

1407

multiprocessing.Process(target = self.sub_process_main,

1408

args = (request, address)).start()

1846

1409

1847

1410

1848

1411

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1854

1417

"""

1855

1418

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1856

1419

1857

proc = MultiprocessingMixIn.process_request(self, request,

1858

client_address)

1420

super(MultiprocessingMixInWithPipe,

1421

self).process_request(request, client_address)

1859

1422

self.child_pipe.close()

1860

self.add_pipe(parent_pipe, proc)

1423

self.add_pipe(parent_pipe)

1861

1424

1862

def add_pipe(self, parent_pipe, proc):

1425

def add_pipe(self, parent_pipe):

1863

1426

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

1864

1427

raise NotImplementedError

1865

1428

1943

1506

self.enabled = False

1944

1507

self.clients = clients

1945

1508

if self.clients is None:

1946

self.clients = {}

1509

self.clients = set()

1947

1510

self.use_dbus = use_dbus

1948

1511

self.gnutls_priority = gnutls_priority

1949

1512

IPv6_TCPServer.__init__(self, server_address,

1953

1516

def server_activate(self):

1954

1517

if self.enabled:

1955

1518

return socketserver.TCPServer.server_activate(self)

1956

1957

1519

def enable(self):

1958

1520

self.enabled = True

1959

1960

def add_pipe(self, parent_pipe, proc):

1521

def add_pipe(self, parent_pipe):

1961

1522

# Call "handle_ipc" for both data and EOF events

1962

1523

gobject.io_add_watch(parent_pipe.fileno(),

1963

1524

gobject.IO_IN | gobject.IO_HUP,

1964

1525

functools.partial(self.handle_ipc,

1965

parent_pipe =

1966

parent_pipe,

1967

proc = proc))

1968

1526

parent_pipe = parent_pipe))

1527

1969

1528

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

1970

proc = None, client_object=None):

1529

client_object=None):

1971

1530

condition_names = {

1972

1531

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

1973

1532

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

1982

1541

for cond, name in

1983

1542

condition_names.iteritems()

1984

1543

if cond & condition)

1985

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

1544

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

1986

1545

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

1987

# Wait for other process to exit

1988

proc.join()

1989

1546

return False

1990

1547

1991

1548

# Read a request from the child

1996

1553

fpr = request[1]

1997

1554

address = request[2]

1998

1555

1999

for c in self.clients.itervalues():

1556

for c in self.clients:

2000

1557

if c.fingerprint == fpr:

2001

1558

client = c

2002

1559

break

2005

1562

"dress: %s", fpr, address)

2006

1563

if self.use_dbus:

2007

1564

# Emit D-Bus signal

2008

mandos_dbus_service.ClientNotFound(fpr,

2009

address[0])

1565

mandos_dbus_service.ClientNotFound(fpr, address[0])

2010

1566

parent_pipe.send(False)

2011

1567

return False

2012

1568

2013

1569

gobject.io_add_watch(parent_pipe.fileno(),

2014

1570

gobject.IO_IN | gobject.IO_HUP,

2015

1571

functools.partial(self.handle_ipc,

2016

parent_pipe =

2017

parent_pipe,

2018

proc = proc,

2019

client_object =

2020

client))

1572

parent_pipe = parent_pipe,

1573

client_object = client))

2021

1574

parent_pipe.send(True)

2022

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

2023

# same fileno

1575

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

2024

1576

return False

2025

1577

if command == 'funcall':

2026

1578

funcname = request[1]

2027

1579

args = request[2]

2028

1580

kwargs = request[3]

2029

1581

2030

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

2031

funcname)(*args,

2032

**kwargs)))

1582

parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))

2033

1583

2034

1584

if command == 'getattr':

2035

1585

attrname = request[1]

2036

1586

if callable(client_object.__getattribute__(attrname)):

2037

1587

parent_pipe.send(('function',))

2038

1588

else:

2039

parent_pipe.send(('data', client_object

2040

.__getattribute__(attrname)))

1589

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

2041

1590

2042

1591

if command == 'setattr':

2043

1592

attrname = request[1]

2086

1635

return timevalue

2087

1636

2088

1637

1638

def if_nametoindex(interface):

1639

"""Call the C function if_nametoindex(), or equivalent

1640

1641

Note: This function cannot accept a unicode string."""

1642

global if_nametoindex

1643

try:

1644

if_nametoindex = (ctypes.cdll.LoadLibrary

1645

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

1646

.if_nametoindex)

1647

except (OSError, AttributeError):

1648

logger.warning("Doing if_nametoindex the hard way")

1649

def if_nametoindex(interface):

1650

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

1651

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

1652

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

1653

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1654

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

1655

interface))

1656

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

1657

ifreq[16:20])[0]

1658

return interface_index

1659

return if_nametoindex(interface)

1660

1661

2089

1662

def daemon(nochdir = False, noclose = False):

2090

1663

"""See daemon(3). Standard BSD Unix function.

2091

1664

2099

1672

sys.exit()

2100

1673

if not noclose:

2101

1674

# Close all standard open file descriptors

2102

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

1675

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

2103

1676

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

2104

1677

raise OSError(errno.ENODEV,

2105

1678

"%s not a character device"

2106

% os.devnull)

1679

% os.path.devnull)

2107

1680

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

2108

1681

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

2109

1682

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

2146

1719

" system bus interface")

2147

1720

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

2148

1721

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

2149

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

2150

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

2151

" state")

2152

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

2153

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

2154

2155

1722

options = parser.parse_args()

2156

1723

2157

1724

if options.check:

2170

1737

"use_dbus": "True",

2171

1738

"use_ipv6": "True",

2172

1739

"debuglevel": "",

2173

"restore": "True",

2174

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

2175

1740

}

2176

1741

2177

1742

# Parse config file for server-global settings

2194

1759

# options, if set.

2195

1760

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

2196

1761

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

2197

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

2198

"statedir"):

1762

"use_dbus", "use_ipv6", "debuglevel"):

2199

1763

value = getattr(options, option)

2200

1764

if value is not None:

2201

1765

server_settings[option] = value

2213

1777

debuglevel = server_settings["debuglevel"]

2214

1778

use_dbus = server_settings["use_dbus"]

2215

1779

use_ipv6 = server_settings["use_ipv6"]

2216

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

2217

stored_state_file)

2218

2219

if debug:

2220

initlogger(debug, logging.DEBUG)

2221

else:

2222

if not debuglevel:

2223

initlogger(debug)

2224

else:

2225

level = getattr(logging, debuglevel.upper())

2226

initlogger(debug, level)

2227

1780

2228

1781

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

2229

1782

syslogger.setFormatter(logging.Formatter

2232

1785

% server_settings["servicename"]))

2233

1786

2234

1787

# Parse config file with clients

2235

client_config = configparser.SafeConfigParser(Client

2236

.client_defaults)

1788

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

1789

"extended_timeout": "15m",

1790

"interval": "2m",

1791

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

1792

"host": "",

1793

"approval_delay": "0s",

1794

"approval_duration": "1s",

1795

}

1796

client_config = configparser.SafeConfigParser(client_defaults)

2237

1797

client_config.read(os.path.join(server_settings["configdir"],

2238

1798

"clients.conf"))

2239

1799

2256

1816

except IOError:

2257

1817

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

2258

1818

2259

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

1819

try:

1820

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

1821

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

1822

except KeyError:

2260

1823

try:

2261

uid = pwd.getpwnam(name).pw_uid

2262

gid = pwd.getpwnam(name).pw_gid

2263

break

1824

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

1825

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

2264

1826

except KeyError:

2265

continue

2266

else:

2267

uid = 65534

2268

gid = 65534

1827

try:

1828

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

1829

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

1830

except KeyError:

1831

uid = 65534

1832

gid = 65534

2269

1833

try:

2270

1834

os.setgid(gid)

2271

1835

os.setuid(uid)

2273

1837

if error[0] != errno.EPERM:

2274

1838

raise error

2275

1839

1840

if not debug and not debuglevel:

1841

syslogger.setLevel(logging.WARNING)

1842

console.setLevel(logging.WARNING)

1843

if debuglevel:

1844

level = getattr(logging, debuglevel.upper())

1845

syslogger.setLevel(level)

1846

console.setLevel(level)

1847

2276

1848

if debug:

2277

1849

# Enable all possible GnuTLS debugging

2278

1850

2288

1860

.gnutls_global_set_log_function(debug_gnutls))

2289

1861

2290

1862

# Redirect stdin so all checkers get /dev/null

2291

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

1863

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

2292

1864

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

2293

1865

if null > 2:

2294

1866

os.close(null)

1867

else:

1868

# No console logging

1869

logger.removeHandler(console)

2295

1870

2296

1871

# Need to fork before connecting to D-Bus

2297

1872

if not debug:

2298

1873

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

2299

1874

daemon()

2300

1875

2301

gobject.threads_init()

2302

2303

1876

global main_loop

2304

1877

# From the Avahi example code

2305

DBusGMainLoop(set_as_default=True)

1878

DBusGMainLoop(set_as_default=True )

2306

1879

main_loop = gobject.MainLoop()

2307

1880

bus = dbus.SystemBus()

2308

1881

# End of Avahi example code

2309

1882

if use_dbus:

2310

1883

try:

2311

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

1884

bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",

2312

1885

bus, do_not_queue=True)

2313

old_bus_name = (dbus.service.BusName

2314

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

2315

do_not_queue=True))

2316

1886

except dbus.exceptions.NameExistsException as e:

2317

1887

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

2318

1888

use_dbus = False

2319

1889

server_settings["use_dbus"] = False

2320

1890

tcp_server.use_dbus = False

2321

1891

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2322

service = AvahiServiceToSyslog(name =

2323

server_settings["servicename"],

2324

servicetype = "_mandos._tcp",

2325

protocol = protocol, bus = bus)

1892

service = AvahiService(name = server_settings["servicename"],

1893

servicetype = "_mandos._tcp",

1894

protocol = protocol, bus = bus)

2326

1895

if server_settings["interface"]:

2327

1896

service.interface = (if_nametoindex

2328

1897

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

2332

1901

2333

1902

client_class = Client

2334

1903

if use_dbus:

2335

client_class = functools.partial(ClientDBusTransitional,

2336

bus = bus)

2337

2338

client_settings = Client.config_parser(client_config)

2339

old_client_settings = {}

2340

clients_data = {}

2341

2342

# Get client data and settings from last running state.

2343

if server_settings["restore"]:

2344

try:

2345

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

2346

clients_data, old_client_settings = (pickle.load

2347

(stored_state))

2348

os.remove(stored_state_path)

2349

except IOError as e:

2350

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

2351

.format(e))

2352

if e.errno != errno.ENOENT:

2353

raise

2354

except EOFError as e:

2355

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

2356

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

2357

2358

with PGPEngine() as pgp:

2359

for client_name, client in clients_data.iteritems():

2360

# Decide which value to use after restoring saved state.

2361

# We have three different values: Old config file,

2362

# new config file, and saved state.

2363

# New config value takes precedence if it differs from old

2364

# config value, otherwise use saved state.

2365

for name, value in client_settings[client_name].items():

2366

try:

2367

# For each value in new config, check if it

2368

# differs from the old config value (Except for

2369

# the "secret" attribute)

2370

if (name != "secret" and

2371

value != old_client_settings[client_name]

2372

[name]):

2373

client[name] = value

2374

except KeyError:

2375

pass

2376

2377

# Clients who has passed its expire date can still be

2378

# enabled if its last checker was successful. Clients

2379

# whose checker succeeded before we stored its state is

2380

# assumed to have successfully run all checkers during

2381

# downtime.

2382

if client["enabled"]:

2383

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

2384

if not client["last_checked_ok"]:

2385

logger.warning(

2386

"disabling client {0} - Client never "

2387

"performed a successful checker"

2388

.format(client_name))

2389

client["enabled"] = False

2390

elif client["last_checker_status"] != 0:

2391

logger.warning(

2392

"disabling client {0} - Client "

2393

"last checker failed with error code {1}"

2394

.format(client_name,

2395

client["last_checker_status"]))

2396

client["enabled"] = False

2397

else:

2398

client["expires"] = (datetime.datetime

2399

.utcnow()

2400

+ client["timeout"])

2401

logger.debug("Last checker succeeded,"

2402

" keeping {0} enabled"

2403

.format(client_name))

1904

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

1905

def client_config_items(config, section):

1906

special_settings = {

1907

"approved_by_default":

1908

lambda: config.getboolean(section,

1909

"approved_by_default"),

1910

}

1911

for name, value in config.items(section):

2404

1912

try:

2405

client["secret"] = (

2406

pgp.decrypt(client["encrypted_secret"],

2407

client_settings[client_name]

2408

["secret"]))

2409

except PGPError:

2410

# If decryption fails, we use secret from new settings

2411

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

2412

.format(client_name))

2413

client["secret"] = (

2414

client_settings[client_name]["secret"])

2415

2416

2417

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

2418

for client_name in (set(old_client_settings)

2419

- set(client_settings)):

2420

del clients_data[client_name]

2421

for client_name in (set(client_settings)

2422

- set(old_client_settings)):

2423

clients_data[client_name] = client_settings[client_name]

2424

2425

# Create all client objects

2426

for client_name, client in clients_data.iteritems():

2427

tcp_server.clients[client_name] = client_class(

2428

name = client_name, settings = client)

2429

1913

yield (name, special_settings[name]())

1914

except KeyError:

1915

yield (name, value)

1916

1917

tcp_server.clients.update(set(

1918

client_class(name = section,

1919

config= dict(client_config_items(

1920

client_config, section)))

1921

for section in client_config.sections()))

2430

1922

if not tcp_server.clients:

2431

1923

logger.warning("No clients defined")

2432

1924

2443

1935

# "pidfile" was never created

2444

1936

pass

2445

1937

del pidfilename

1938

2446

1939

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

2447

1940

2448

1941

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

2449

1942

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

2450

1943

2451

1944

if use_dbus:

2452

class MandosDBusService(DBusObjectWithProperties):

1945

class MandosDBusService(dbus.service.Object):

2453

1946

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

2454

1947

def __init__(self):

2455

1948

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

2456

_interface = "se.recompile.Mandos"

2457

2458

@dbus_interface_annotations(_interface)

2459

def _foo(self):

2460

return { "org.freedesktop.DBus.Property"

2461

".EmitsChangedSignal":

2462

"false"}

1949

_interface = "se.bsnet.fukt.Mandos"

2463

1950

2464

1951

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

2465

1952

def ClientAdded(self, objpath):

2480

1967

def GetAllClients(self):

2481

1968

"D-Bus method"

2482

1969

return dbus.Array(c.dbus_object_path

2483

for c in

2484

tcp_server.clients.itervalues())

1970

for c in tcp_server.clients)

2485

1971

2486

1972

@dbus.service.method(_interface,

2487

1973

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

2489

1975

"D-Bus method"

2490

1976

return dbus.Dictionary(

2491

1977

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

2492

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

1978

for c in tcp_server.clients),

2493

1979

signature="oa{sv}")

2494

1980

2495

1981

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

2496

1982

def RemoveClient(self, object_path):

2497

1983

"D-Bus method"

2498

for c in tcp_server.clients.itervalues():

1984

for c in tcp_server.clients:

2499

1985

if c.dbus_object_path == object_path:

2500

del tcp_server.clients[c.name]

1986

tcp_server.clients.remove(c)

2501

1987

c.remove_from_connection()

2502

1988

# Don't signal anything except ClientRemoved

2503

1989

c.disable(quiet=True)

2508

1994

2509

1995

del _interface

2510

1996

2511

class MandosDBusServiceTransitional(MandosDBusService):

2512

__metaclass__ = AlternateDBusNamesMetaclass

2513

mandos_dbus_service = MandosDBusServiceTransitional()

1997

mandos_dbus_service = MandosDBusService()

2514

1998

2515

1999

def cleanup():

2516

2000

"Cleanup function; run on exit"

2517

2001

service.cleanup()

2518

2002

2519

multiprocessing.active_children()

2520

if not (tcp_server.clients or client_settings):

2521

return

2522

2523

# Store client before exiting. Secrets are encrypted with key

2524

# based on what config file has. If config file is

2525

# removed/edited, old secret will thus be unrecovable.

2526

clients = {}

2527

with PGPEngine() as pgp:

2528

for client in tcp_server.clients.itervalues():

2529

key = client_settings[client.name]["secret"]

2530

client.encrypted_secret = pgp.encrypt(client.secret,

2531

key)

2532

client_dict = {}

2533

2534

# A list of attributes that can not be pickled

2535

# + secret.

2536

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

2537

"checker"))

2538

for name, typ in (inspect.getmembers

2539

(dbus.service.Object)):

2540

exclude.add(name)

2541

2542

client_dict["encrypted_secret"] = (client

2543

.encrypted_secret)

2544

for attr in client.client_structure:

2545

if attr not in exclude:

2546

client_dict[attr] = getattr(client, attr)

2547

2548

clients[client.name] = client_dict

2549

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

2550

2551

try:

2552

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

2553

prefix="clients-",

2554

dir=os.path.dirname

2555

(stored_state_path))

2556

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

2557

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

2558

os.rename(tempname, stored_state_path)

2559

except (IOError, OSError) as e:

2560

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

2561

.format(e))

2562

if not debug:

2563

try:

2564

os.remove(tempname)

2565

except NameError:

2566

pass

2567

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

2568

errno.EEXIST)):

2569

raise e

2570

2571

# Delete all clients, and settings from config

2572

2003

while tcp_server.clients:

2573

name, client = tcp_server.clients.popitem()

2004

client = tcp_server.clients.pop()

2574

2005

if use_dbus:

2575

2006

client.remove_from_connection()

2007

client.disable_hook = None

2576

2008

# Don't signal anything except ClientRemoved

2577

2009

client.disable(quiet=True)

2578

2010

if use_dbus:

2579

2011

# Emit D-Bus signal

2580

mandos_dbus_service.ClientRemoved(client

2581

.dbus_object_path,

2012

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2582

2013

client.name)

2583

client_settings.clear()

2584

2014

2585

2015

atexit.register(cleanup)

2586

2016

2587

for client in tcp_server.clients.itervalues():

2017

for client in tcp_server.clients:

2588

2018

if use_dbus:

2589

2019

# Emit D-Bus signal

2590

2020

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2591

# Need to initiate checking of clients

2592

if client.enabled:

2593

client.init_checker()

2021

client.enable()

2594

2022

2595

2023

tcp_server.enable()

2596

2024

tcp_server.server_activate()

2612

2040

try:

2613

2041

service.activate()

2614

2042

except dbus.exceptions.DBusException as error:

2615

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

2043

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

2616

2044

cleanup()

2617

2045

sys.exit(1)

2618

2046

# End of Avahi example code

2625

2053

logger.debug("Starting main loop")

2626

2054

main_loop.run()

2627

2055

except AvahiError as error:

2628

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

2056

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

2629

2057

cleanup()

2630

2058

sys.exit(1)

2631

2059

except KeyboardInterrupt:

2636

2064

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

2637

2065

cleanup()

2638

2066

2067

2639

2068

if __name__ == '__main__':

2640

2069

main()