/mandos/trunk : revision 549

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@fukt.bsnet.se>.

31

# Contact the authors at <mandos@recompile.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

65

68

66

69

import dbus

67

70

import dbus.service

72

75

import ctypes.util

73

76

import xml.dom.minidom

74

77

import inspect

78

import GnuPGInterface

75

79

76

80

try:

77

81

SO_BINDTODEVICE = socket.SO_BINDTODEVICE

81

85

except ImportError:

82

86

SO_BINDTODEVICE = None

83

87

84

85

version = "1.3.1"

86

87

#logger = logging.getLogger('mandos')

88

logger = logging.Logger('mandos')

88

version = "1.5.0"

89

stored_state_file = "clients.pickle"

90

91

logger = logging.getLogger()

89

92

syslogger = (logging.handlers.SysLogHandler

90

93

(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

91

94

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

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)

95

96

try:

97

if_nametoindex = (ctypes.cdll.LoadLibrary

98

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

99

.if_nametoindex)

100

except (OSError, AttributeError):

101

def if_nametoindex(interface):

102

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

103

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

104

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

105

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

106

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

107

interface))

108

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

109

ifreq[16:20])[0]

110

return interface_index

111

112

113

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

114

"""init logger and add loglevel"""

115

116

syslogger.setFormatter(logging.Formatter

117

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

118

' %(message)s'))

119

logger.addHandler(syslogger)

120

121

if debug:

122

console = logging.StreamHandler()

123

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

124

' [%(process)d]:'

125

' %(levelname)s:'

126

' %(message)s'))

127

logger.addHandler(console)

128

logger.setLevel(level)

129

130

131

class PGPError(Exception):

132

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

133

pass

134

135

136

class PGPEngine(object):

137

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

138

def __init__(self):

139

self.gnupg = GnuPGInterface.GnuPG()

140

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

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'])

147

148

def __enter__(self):

149

return self

150

151

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

152

self._cleanup()

153

return False

154

155

def __del__(self):

156

self._cleanup()

157

158

def _cleanup(self):

159

if self.tempdir is not None:

160

# Delete contents of tempdir

161

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

162

topdown = False):

163

for filename in files:

164

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

165

for dirname in dirs:

166

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

167

# Remove tempdir

168

os.rmdir(self.tempdir)

169

self.tempdir = None

170

171

def password_encode(self, password):

172

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

173

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

174

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

175

176

def encrypt(self, data, password):

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

191

return ciphertext

192

193

def decrypt(self, data, password):

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

208

return decrypted_plaintext

209

210

102

211

103

212

class AvahiError(Exception):

104

213

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

159

268

" after %i retries, exiting.",

160

269

self.rename_count)

161

270

raise AvahiServiceError("Too many renames")

162

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

271

self.name = unicode(self.server

272

.GetAlternativeServiceName(self.name))

163

273

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

164

274

self.name)

165

syslogger.setFormatter(logging.Formatter

166

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

167

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

168

% self.name))

169

275

self.remove()

170

276

try:

171

277

self.add()

191

297

avahi.DBUS_INTERFACE_ENTRY_GROUP)

192

298

self.entry_group_state_changed_match = (

193

299

self.group.connect_to_signal(

194

'StateChanged', self .entry_group_state_changed))

300

'StateChanged', self.entry_group_state_changed))

195

301

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

196

302

self.name, self.type)

197

303

self.group.AddService(

223

329

try:

224

330

self.group.Free()

225

331

except (dbus.exceptions.UnknownMethodException,

226

dbus.exceptions.DBusException) as e:

332

dbus.exceptions.DBusException):

227

333

pass

228

334

self.group = None

229

335

self.remove()

263

369

self.server_state_changed)

264

370

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

265

371

372

class AvahiServiceToSyslog(AvahiService):

373

def rename(self):

374

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

375

ret = AvahiService.rename(self)

376

syslogger.setFormatter(logging.Formatter

377

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

378

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

379

% self.name))

380

return ret

266

381

267

def _timedelta_to_milliseconds(td):

382

def timedelta_to_milliseconds(td):

268

383

"Convert a datetime.timedelta() to milliseconds"

269

384

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

270

385

+ (td.seconds * 1000)

274

389

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

275

390

276

391

Attributes:

277

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

392

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

278

393

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

279

394

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

280

395

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

287

402

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

288

403

checker_initiator_tag: a gobject event source tag, or None

289

404

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

405

client_structure: Object describing what attributes a client has

406

and is used for storing the client at exit

290

407

current_checker_command: string; current running checker_command

291

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

292

408

disable_initiator_tag: a gobject event source tag, or None

293

409

enabled: bool()

294

410

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

297

413

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

298

414

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

299

415

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

300

last_enabled: datetime.datetime(); (UTC)

416

last_checker_status: integer between 0 and 255 reflecting exit

417

status of last checker. -1 reflects crashed

418

checker, or None.

419

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

301

420

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

302

421

D-Bus identifiers

303

422

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

313

432

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

314

433

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

315

434

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

435

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

436

"extended_timeout": "15m",

437

"interval": "2m",

438

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

439

"host": "",

440

"approval_delay": "0s",

441

"approval_duration": "1s",

442

"approved_by_default": "True",

443

"enabled": "True",

444

}

316

445

317

446

def timeout_milliseconds(self):

318

447

"Return the 'timeout' attribute in milliseconds"

319

return _timedelta_to_milliseconds(self.timeout)

448

return timedelta_to_milliseconds(self.timeout)

320

449

321

450

def extended_timeout_milliseconds(self):

322

451

"Return the 'extended_timeout' attribute in milliseconds"

323

return _timedelta_to_milliseconds(self.extended_timeout)

452

return timedelta_to_milliseconds(self.extended_timeout)

324

453

325

454

def interval_milliseconds(self):

326

455

"Return the 'interval' attribute in milliseconds"

327

return _timedelta_to_milliseconds(self.interval)

456

return timedelta_to_milliseconds(self.interval)

328

457

329

458

def approval_delay_milliseconds(self):

330

return _timedelta_to_milliseconds(self.approval_delay)

331

332

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

459

return timedelta_to_milliseconds(self.approval_delay)

460

461

@staticmethod

462

def config_parser(config):

463

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

464

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

465

with exceptions for any special settings as defined above.

466

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

467

value given the same arguments.

468

"""

469

settings = {}

470

for client_name in config.sections():

471

section = dict(config.items(client_name))

472

client = settings[client_name] = {}

473

474

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

475

# Reformat values from string types to Python types

476

client["approved_by_default"] = config.getboolean(

477

client_name, "approved_by_default")

478

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

479

"enabled")

480

481

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

482

.replace(" ", ""))

483

if "secret" in section:

484

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

485

elif "secfile" in section:

486

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

487

(section["secfile"])),

488

"rb") as secfile:

489

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

490

else:

491

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

492

% section)

493

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

494

client["extended_timeout"] = string_to_delta(

495

section["extended_timeout"])

496

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

497

client["approval_delay"] = string_to_delta(

498

section["approval_delay"])

499

client["approval_duration"] = string_to_delta(

500

section["approval_duration"])

501

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

502

client["last_approval_request"] = None

503

client["last_checked_ok"] = None

504

client["last_checker_status"] = None

505

506

return settings

507

508

509

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

333

510

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

334

511

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

335

512

attribute."""

336

513

self.name = name

337

if config is None:

338

config = {}

514

# adding all client settings

515

for setting, value in settings.iteritems():

516

setattr(self, setting, value)

517

518

if self.enabled:

519

if not hasattr(self, "last_enabled"):

520

self.last_enabled = datetime.datetime.utcnow()

521

if not hasattr(self, "expires"):

522

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

523

+ self.timeout)

524

else:

525

self.last_enabled = None

526

self.expires = None

527

339

528

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

340

529

# Uppercase and remove spaces from fingerprint for later

341

530

# comparison purposes with return value from the fingerprint()

342

531

# function

343

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

344

.replace(" ", ""))

345

532

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

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

533

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

534

datetime.datetime.utcnow())

535

536

# attributes specific for this server instance

366

537

self.checker = None

367

538

self.checker_initiator_tag = None

368

539

self.disable_initiator_tag = None

369

self.expires = None

370

540

self.checker_callback_tag = None

371

self.checker_command = config["checker"]

372

541

self.current_checker_command = None

373

self.last_connect = None

374

self._approved = None

375

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

376

True)

542

self.approved = None

377

543

self.approvals_pending = 0

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())

544

self.changedstate = (multiprocessing_manager

545

.Condition(multiprocessing_manager

546

.Lock()))

547

self.client_structure = [attr for attr in

548

self.__dict__.iterkeys()

549

if not attr.startswith("_")]

550

self.client_structure.append("client_structure")

551

552

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

553

lambda obj:

554

isinstance(obj,

555

property)):

556

if not name.startswith("_"):

557

self.client_structure.append(name)

383

558

559

# Send notice to process children that client state has changed

384

560

def send_changedstate(self):

385

self.changedstate.acquire()

386

self.changedstate.notify_all()

387

self.changedstate.release()

388

561

with self.changedstate:

562

self.changedstate.notify_all()

563

389

564

def enable(self):

390

565

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

391

566

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

392

567

# Already enabled

393

568

return

394

569

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

401

570

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

402

self.disable_initiator_tag = (gobject.timeout_add

403

(self.timeout_milliseconds(),

404

self.disable))

405

571

self.enabled = True

406

572

self.last_enabled = datetime.datetime.utcnow()

407

# Also start a new checker *right now*.

408

self.start_checker()

573

self.init_checker()

409

574

410

575

def disable(self, quiet=True):

411

576

"""Disable this client."""

423

588

gobject.source_remove(self.checker_initiator_tag)

424

589

self.checker_initiator_tag = None

425

590

self.stop_checker()

426

if self.disable_hook:

427

self.disable_hook(self)

428

591

self.enabled = False

429

592

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

430

593

return False

431

594

432

595

def __del__(self):

433

self.disable_hook = None

434

596

self.disable()

435

597

598

def init_checker(self):

599

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

600

# and every interval from then on.

601

self.checker_initiator_tag = (gobject.timeout_add

602

(self.interval_milliseconds(),

603

self.start_checker))

604

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

605

self.disable_initiator_tag = (gobject.timeout_add

606

(self.timeout_milliseconds(),

607

self.disable))

608

# Also start a new checker *right now*.

609

self.start_checker()

610

436

611

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

437

612

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

438

613

self.checker_callback_tag = None

439

614

self.checker = None

440

615

if os.WIFEXITED(condition):

441

exitstatus = os.WEXITSTATUS(condition)

442

if exitstatus == 0:

616

self.last_checker_status = os.WEXITSTATUS(condition)

617

if self.last_checker_status == 0:

443

618

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

444

619

vars(self))

445

620

self.checked_ok()

447

622

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

448

623

vars(self))

449

624

else:

625

self.last_checker_status = -1

450

626

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

451

627

vars(self))

452

628

459

635

if timeout is None:

460

636

timeout = self.timeout

461

637

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))

638

if self.disable_initiator_tag is not None:

639

gobject.source_remove(self.disable_initiator_tag)

640

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

641

self.disable_initiator_tag = (gobject.timeout_add

642

(timedelta_to_milliseconds

643

(timeout), self.disable))

644

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

467

645

468

646

def need_approval(self):

469

647

self.last_approval_request = datetime.datetime.utcnow()

626

804

def _get_all_dbus_properties(self):

627

805

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

628

806

"""

629

return ((prop._dbus_name, prop)

807

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

808

for cls in self.__class__.__mro__

630

809

for name, prop in

631

inspect.getmembers(self, self._is_dbus_property))

810

inspect.getmembers(cls, self._is_dbus_property))

632

811

633

812

def _get_dbus_property(self, interface_name, property_name):

634

813

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

635

814

property with the specified name and interface.

636

815

"""

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

816

for cls in self.__class__.__mro__:

817

for name, value in (inspect.getmembers

818

(cls, self._is_dbus_property)):

819

if (value._dbus_name == property_name

820

and value._dbus_interface == interface_name):

821

return value.__get__(self)

822

647

823

# No such property

648

824

raise DBusPropertyNotFound(self.dbus_object_path + ":"

649

825

+ interface_name + "."

674

850

# signatures other than "ay".

675

851

if prop._dbus_signature != "ay":

676

852

raise ValueError

677

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

678

for byte in value))

853

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

854

for byte in value))

679

855

prop(value)

680

856

681

857

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

686

862

687

863

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

688

864

"""

689

all = {}

865

properties = {}

690

866

for name, prop in self._get_all_dbus_properties():

691

867

if (interface_name

692

868

and interface_name != prop._dbus_interface):

697

873

continue

698

874

value = prop()

699

875

if not hasattr(value, "variant_level"):

700

all[name] = value

876

properties[name] = value

701

877

continue

702

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

703

value.variant_level+1)

704

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

878

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

879

value.variant_level+1)

880

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

705

881

706

882

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

707

883

out_signature="s",

759

935

variant_level=variant_level)

760

936

761

937

938

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

939

.__metaclass__):

940

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

941

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

942

"""

943

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

944

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

945

# methods, signals, or properties in them

946

for base in (b for b in bases

947

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

948

# Go though all attributes of the base class

949

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

950

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

951

# with the wrong interface name

952

if (not hasattr(attribute, "_dbus_interface")

953

or not attribute._dbus_interface

954

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

955

continue

956

# Create an alternate D-Bus interface name based on

957

# the current name

958

alt_interface = (attribute._dbus_interface

959

.replace("se.recompile.Mandos",

960

"se.bsnet.fukt.Mandos"))

961

# Is this a D-Bus signal?

962

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

963

# Extract the original non-method function by

964

# black magic

965

nonmethod_func = (dict(

966

zip(attribute.func_code.co_freevars,

967

attribute.__closure__))["func"]

968

.cell_contents)

969

# Create a new, but exactly alike, function

970

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

971

# with the alternate D-Bus interface name

972

new_function = (dbus.service.signal

973

(alt_interface,

974

attribute._dbus_signature)

975

(types.FunctionType(

976

nonmethod_func.func_code,

977

nonmethod_func.func_globals,

978

nonmethod_func.func_name,

979

nonmethod_func.func_defaults,

980

nonmethod_func.func_closure)))

981

# Define a creator of a function to call both the

982

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

983

# signals gets sent when the function is called

984

def fixscope(func1, func2):

985

"""This function is a scope container to pass

986

func1 and func2 to the "call_both" function

987

outside of its arguments"""

988

def call_both(*args, **kwargs):

989

"""This function will emit two D-Bus

990

signals by calling func1 and func2"""

991

func1(*args, **kwargs)

992

func2(*args, **kwargs)

993

return call_both

994

# Create the "call_both" function and add it to

995

# the class

996

attr[attrname] = fixscope(attribute,

997

new_function)

998

# Is this a D-Bus method?

999

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

1000

# Create a new, but exactly alike, function

1001

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

1002

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

1003

# to the class.

1004

attr[attrname] = (dbus.service.method

1005

(alt_interface,

1006

attribute._dbus_in_signature,

1007

attribute._dbus_out_signature)

1008

(types.FunctionType

1009

(attribute.func_code,

1010

attribute.func_globals,

1011

attribute.func_name,

1012

attribute.func_defaults,

1013

attribute.func_closure)))

1014

# Is this a D-Bus property?

1015

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

1016

# Create a new, but exactly alike, function

1017

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

1018

# property with the alternate D-Bus interface

1019

# name. Add it to the class.

1020

attr[attrname] = (dbus_service_property

1021

(alt_interface,

1022

attribute._dbus_signature,

1023

attribute._dbus_access,

1024

attribute

1025

._dbus_get_args_options

1026

["byte_arrays"])

1027

(types.FunctionType

1028

(attribute.func_code,

1029

attribute.func_globals,

1030

attribute.func_name,

1031

attribute.func_defaults,

1032

attribute.func_closure)))

1033

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

1034

1035

762

1036

class ClientDBus(Client, DBusObjectWithProperties):

763

1037

"""A Client class using D-Bus

764

1038

773

1047

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

774

1048

775

1049

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

776

self._approvals_pending = 0

777

1050

self.bus = bus

778

1051

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

1052

self._approvals_pending = 0

1053

1054

self._approvals_pending = 0

779

1055

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

780

1056

# the D-Bus

781

1057

client_object_name = unicode(self.name).translate(

789

1065

def notifychangeproperty(transform_func,

790

1066

dbus_name, type_func=lambda x: x,

791

1067

variant_level=1):

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

1068

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

1069

its changes to DBus.

1070

1071

transform_fun: Function that takes a value and a variant_level

1072

and transforms it to a D-Bus type.

1073

dbus_name: D-Bus name of the variable

797

1074

type_func: Function that transform the value before sending it

798

to DBus

799

variant_level: DBus variant level. default: 1

1075

to the D-Bus. Default: no transform

1076

variant_level: D-Bus variant level. Default: 1

800

1077

"""

801

real_value = [None,]

1078

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

802

1079

def setter(self, value):

803

old_value = real_value[0]

804

real_value[0] = value

805

1080

if hasattr(self, "dbus_object_path"):

806

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

807

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

808

variant_level)

1081

if (not hasattr(self, attrname) or

1082

type_func(getattr(self, attrname, None))

1083

!= type_func(value)):

1084

dbus_value = transform_func(type_func(value),

1085

variant_level

1086

=variant_level)

809

1087

self.PropertyChanged(dbus.String(dbus_name),

810

1088

dbus_value)

1089

setattr(self, attrname, value)

811

1090

812

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

1091

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

813

1092

814

1093

815

1094

expires = notifychangeproperty(datetime_to_dbus, "Expires")

820

1099

last_enabled = notifychangeproperty(datetime_to_dbus,

821

1100

"LastEnabled")

822

1101

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

823

type_func = lambda checker: checker is not None)

1102

type_func = lambda checker:

1103

checker is not None)

824

1104

last_checked_ok = notifychangeproperty(datetime_to_dbus,

825

1105

"LastCheckedOK")

826

last_approval_request = notifychangeproperty(datetime_to_dbus,

827

"LastApprovalRequest")

1106

last_approval_request = notifychangeproperty(

1107

datetime_to_dbus, "LastApprovalRequest")

828

1108

approved_by_default = notifychangeproperty(dbus.Boolean,

829

1109

"ApprovedByDefault")

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)

1110

approval_delay = notifychangeproperty(dbus.UInt64,

1111

"ApprovalDelay",

1112

type_func =

1113

timedelta_to_milliseconds)

1114

approval_duration = notifychangeproperty(

1115

dbus.UInt64, "ApprovalDuration",

1116

type_func = timedelta_to_milliseconds)

834

1117

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

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)

1118

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

1119

type_func =

1120

timedelta_to_milliseconds)

1121

extended_timeout = notifychangeproperty(

1122

dbus.UInt64, "ExtendedTimeout",

1123

type_func = timedelta_to_milliseconds)

1124

interval = notifychangeproperty(dbus.UInt64,

1125

"Interval",

1126

type_func =

1127

timedelta_to_milliseconds)

841

1128

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

842

1129

843

1130

del notifychangeproperty

885

1172

return r

886

1173

887

1174

def _reset_approved(self):

888

self._approved = None

1175

self.approved = None

889

1176

return False

890

1177

891

1178

def approve(self, value=True):

892

1179

self.send_changedstate()

893

self._approved = value

894

gobject.timeout_add(_timedelta_to_milliseconds

1180

self.approved = value

1181

gobject.timeout_add(timedelta_to_milliseconds

895

1182

(self.approval_duration),

896

1183

self._reset_approved)

897

1184

898

1185

899

1186

## D-Bus methods, signals & properties

900

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

1187

_interface = "se.recompile.Mandos.Client"

901

1188

902

1189

## Signals

903

1190

940

1227

"D-Bus signal"

941

1228

return self.need_approval()

942

1229

1230

# NeRwequest - signal

1231

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

1232

def NewRequest(self, ip):

1233

"""D-Bus signal

1234

Is sent after a client request a password.

1235

"""

1236

pass

1237

943

1238

## Methods

944

1239

945

1240

# Approve - method

1003

1298

access="readwrite")

1004

1299

def ApprovalDuration_dbus_property(self, value=None):

1005

1300

if value is None: # get

1006

return dbus.UInt64(_timedelta_to_milliseconds(

1301

return dbus.UInt64(timedelta_to_milliseconds(

1007

1302

self.approval_duration))

1008

1303

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

1009

1304

1023

1318

def Host_dbus_property(self, value=None):

1024

1319

if value is None: # get

1025

1320

return dbus.String(self.host)

1026

self.host = value

1321

self.host = unicode(value)

1027

1322

1028

1323

# Created - property

1029

1324

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

1030

1325

def Created_dbus_property(self):

1031

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

1326

return datetime_to_dbus(self.created)

1032

1327

1033

1328

# LastEnabled - property

1034

1329

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

1072

1367

if value is None: # get

1073

1368

return dbus.UInt64(self.timeout_milliseconds())

1074

1369

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

1075

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

1076

return

1077

1370

# Reschedule timeout

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))

1371

if self.enabled:

1372

now = datetime.datetime.utcnow()

1373

time_to_die = timedelta_to_milliseconds(

1374

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

1375

if time_to_die <= 0:

1376

# The timeout has passed

1377

self.disable()

1378

else:

1379

self.expires = (now +

1380

datetime.timedelta(milliseconds =

1381

time_to_die))

1382

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

1383

is None):

1384

return

1385

gobject.source_remove(self.disable_initiator_tag)

1386

self.disable_initiator_tag = (gobject.timeout_add

1387

(time_to_die,

1388

self.disable))

1095

1389

1096

1390

# ExtendedTimeout - property

1097

1391

@dbus_service_property(_interface, signature="t",

1110

1404

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

1111

1405

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

1112

1406

return

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

1407

if self.enabled:

1408

# Reschedule checker run

1409

gobject.source_remove(self.checker_initiator_tag)

1410

self.checker_initiator_tag = (gobject.timeout_add

1411

(value, self.start_checker))

1412

self.start_checker() # Start one now, too

1118

1413

1119

1414

# Checker - property

1120

1415

@dbus_service_property(_interface, signature="s",

1122

1417

def Checker_dbus_property(self, value=None):

1123

1418

if value is None: # get

1124

1419

return dbus.String(self.checker_command)

1125

self.checker_command = value

1420

self.checker_command = unicode(value)

1126

1421

1127

1422

# CheckerRunning - property

1128

1423

@dbus_service_property(_interface, signature="b",

1157

1452

raise KeyError()

1158

1453

1159

1454

def __getattribute__(self, name):

1160

if(name == '_pipe'):

1455

if name == '_pipe':

1161

1456

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

1162

1457

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

1163

1458

data = self._pipe.recv()

1170

1465

return func

1171

1466

1172

1467

def __setattr__(self, name, value):

1173

if(name == '_pipe'):

1468

if name == '_pipe':

1174

1469

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

1175

1470

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

1176

1471

1177

1472

1473

class ClientDBusTransitional(ClientDBus):

1474

__metaclass__ = AlternateDBusNamesMetaclass

1475

1476

1178

1477

class ClientHandler(socketserver.BaseRequestHandler, object):

1179

1478

"""A class to handle client connections.

1180

1479

1248

1547

except KeyError:

1249

1548

return

1250

1549

1550

if self.server.use_dbus:

1551

# Emit D-Bus signal

1552

client.NewRequest(str(self.client_address))

1553

1251

1554

if client.approval_delay:

1252

1555

delay = client.approval_delay

1253

1556

client.approvals_pending += 1

1259

1562

client.name)

1260

1563

if self.server.use_dbus:

1261

1564

# Emit D-Bus signal

1262

client.Rejected("Disabled")

1565

client.Rejected("Disabled")

1263

1566

return

1264

1567

1265

if client._approved or not client.approval_delay:

1568

if client.approved or not client.approval_delay:

1266

1569

#We are approved or approval is disabled

1267

1570

break

1268

elif client._approved is None:

1571

elif client.approved is None:

1269

1572

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

1270

1573

client.name)

1271

1574

if self.server.use_dbus:

1282

1585

return

1283

1586

1284

1587

#wait until timeout or approved

1285

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

1286

1588

time = datetime.datetime.now()

1287

1589

client.changedstate.acquire()

1288

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

1590

(client.changedstate.wait

1591

(float(client.timedelta_to_milliseconds(delay)

1592

/ 1000)))

1289

1593

client.changedstate.release()

1290

1594

time2 = datetime.datetime.now()

1291

1595

if (time2 - time) >= delay:

1315

1619

sent_size += sent

1316

1620

1317

1621

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

1318

# bump the timeout as if seen

1622

# bump the timeout using extended_timeout

1319

1623

client.checked_ok(client.extended_timeout)

1320

1624

if self.server.use_dbus:

1321

1625

# Emit D-Bus signal

1389

1693

# Convert the buffer to a Python bytestring

1390

1694

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

1391

1695

# Convert the bytestring to hexadecimal notation

1392

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

1696

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

1393

1697

return hex_fpr

1394

1698

1395

1699

1398

1702

def sub_process_main(self, request, address):

1399

1703

try:

1400

1704

self.finish_request(request, address)

1401

except:

1705

except Exception:

1402

1706

self.handle_error(request, address)

1403

1707

self.close_request(request)

1404

1708

1405

1709

def process_request(self, request, address):

1406

1710

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

1407

multiprocessing.Process(target = self.sub_process_main,

1408

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

1711

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

1712

args = (request,

1713

address))

1714

proc.start()

1715

return proc

1409

1716

1410

1717

1411

1718

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1417

1724

"""

1418

1725

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1419

1726

1420

super(MultiprocessingMixInWithPipe,

1421

self).process_request(request, client_address)

1727

proc = MultiprocessingMixIn.process_request(self, request,

1728

client_address)

1422

1729

self.child_pipe.close()

1423

self.add_pipe(parent_pipe)

1730

self.add_pipe(parent_pipe, proc)

1424

1731

1425

def add_pipe(self, parent_pipe):

1732

def add_pipe(self, parent_pipe, proc):

1426

1733

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

1427

1734

raise NotImplementedError

1428

1735

1506

1813

self.enabled = False

1507

1814

self.clients = clients

1508

1815

if self.clients is None:

1509

self.clients = set()

1816

self.clients = {}

1510

1817

self.use_dbus = use_dbus

1511

1818

self.gnutls_priority = gnutls_priority

1512

1819

IPv6_TCPServer.__init__(self, server_address,

1516

1823

def server_activate(self):

1517

1824

if self.enabled:

1518

1825

return socketserver.TCPServer.server_activate(self)

1826

1519

1827

def enable(self):

1520

1828

self.enabled = True

1521

def add_pipe(self, parent_pipe):

1829

1830

def add_pipe(self, parent_pipe, proc):

1522

1831

# Call "handle_ipc" for both data and EOF events

1523

1832

gobject.io_add_watch(parent_pipe.fileno(),

1524

1833

gobject.IO_IN | gobject.IO_HUP,

1525

1834

functools.partial(self.handle_ipc,

1526

parent_pipe = parent_pipe))

1527

1835

parent_pipe =

1836

parent_pipe,

1837

proc = proc))

1838

1528

1839

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

1529

client_object=None):

1840

proc = None, client_object=None):

1530

1841

condition_names = {

1531

1842

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

1532

1843

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

1541

1852

for cond, name in

1542

1853

condition_names.iteritems()

1543

1854

if cond & condition)

1544

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

1855

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

1545

1856

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

1857

# Wait for other process to exit

1858

proc.join()

1546

1859

return False

1547

1860

1548

1861

# Read a request from the child

1553

1866

fpr = request[1]

1554

1867

address = request[2]

1555

1868

1556

for c in self.clients:

1869

for c in self.clients.itervalues():

1557

1870

if c.fingerprint == fpr:

1558

1871

client = c

1559

1872

break

1562

1875

"dress: %s", fpr, address)

1563

1876

if self.use_dbus:

1564

1877

# Emit D-Bus signal

1565

mandos_dbus_service.ClientNotFound(fpr, address[0])

1878

mandos_dbus_service.ClientNotFound(fpr,

1879

address[0])

1566

1880

parent_pipe.send(False)

1567

1881

return False

1568

1882

1569

1883

gobject.io_add_watch(parent_pipe.fileno(),

1570

1884

gobject.IO_IN | gobject.IO_HUP,

1571

1885

functools.partial(self.handle_ipc,

1572

parent_pipe = parent_pipe,

1573

client_object = client))

1886

parent_pipe =

1887

parent_pipe,

1888

proc = proc,

1889

client_object =

1890

client))

1574

1891

parent_pipe.send(True)

1575

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

1892

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

1893

# same fileno

1576

1894

return False

1577

1895

if command == 'funcall':

1578

1896

funcname = request[1]

1579

1897

args = request[2]

1580

1898

kwargs = request[3]

1581

1899

1582

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

1900

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

1901

funcname)(*args,

1902

**kwargs)))

1583

1903

1584

1904

if command == 'getattr':

1585

1905

attrname = request[1]

1586

1906

if callable(client_object.__getattribute__(attrname)):

1587

1907

parent_pipe.send(('function',))

1588

1908

else:

1589

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

1909

parent_pipe.send(('data', client_object

1910

.__getattribute__(attrname)))

1590

1911

1591

1912

if command == 'setattr':

1592

1913

attrname = request[1]

1635

1956

return timevalue

1636

1957

1637

1958

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

1662

1959

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

1663

1960

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

1664

1961

1719

2016

" system bus interface")

1720

2017

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

1721

2018

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

2019

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

2020

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

2021

" state")

2022

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

2023

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

2024

1722

2025

options = parser.parse_args()

1723

2026

1724

2027

if options.check:

1737

2040

"use_dbus": "True",

1738

2041

"use_ipv6": "True",

1739

2042

"debuglevel": "",

2043

"restore": "True",

2044

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

1740

2045

}

1741

2046

1742

2047

# Parse config file for server-global settings

1759

2064

# options, if set.

1760

2065

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

1761

2066

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

1762

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

2067

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

2068

"statedir"):

1763

2069

value = getattr(options, option)

1764

2070

if value is not None:

1765

2071

server_settings[option] = value

1777

2083

debuglevel = server_settings["debuglevel"]

1778

2084

use_dbus = server_settings["use_dbus"]

1779

2085

use_ipv6 = server_settings["use_ipv6"]

2086

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

2087

stored_state_file)

2088

2089

if debug:

2090

initlogger(debug, logging.DEBUG)

2091

else:

2092

if not debuglevel:

2093

initlogger(debug)

2094

else:

2095

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

2096

initlogger(debug, level)

1780

2097

1781

2098

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

1782

2099

syslogger.setFormatter(logging.Formatter

1785

2102

% server_settings["servicename"]))

1786

2103

1787

2104

# Parse config file with clients

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)

2105

client_config = configparser.SafeConfigParser(Client

2106

.client_defaults)

1797

2107

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

1798

2108

"clients.conf"))

1799

2109

1837

2147

if error[0] != errno.EPERM:

1838

2148

raise error

1839

2149

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

1848

2150

if debug:

1849

2151

# Enable all possible GnuTLS debugging

1850

2152

1864

2166

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

1865

2167

if null > 2:

1866

2168

os.close(null)

1867

else:

1868

# No console logging

1869

logger.removeHandler(console)

1870

2169

1871

2170

# Need to fork before connecting to D-Bus

1872

2171

if not debug:

1873

2172

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

1874

2173

daemon()

1875

2174

2175

gobject.threads_init()

2176

1876

2177

global main_loop

1877

2178

# From the Avahi example code

1878

2179

DBusGMainLoop(set_as_default=True )

1881

2182

# End of Avahi example code

1882

2183

if use_dbus:

1883

2184

try:

1884

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

2185

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

1885

2186

bus, do_not_queue=True)

2187

old_bus_name = (dbus.service.BusName

2188

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

2189

do_not_queue=True))

1886

2190

except dbus.exceptions.NameExistsException as e:

1887

2191

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

1888

2192

use_dbus = False

1889

2193

server_settings["use_dbus"] = False

1890

2194

tcp_server.use_dbus = False

1891

2195

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1892

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

1893

servicetype = "_mandos._tcp",

1894

protocol = protocol, bus = bus)

2196

service = AvahiServiceToSyslog(name =

2197

server_settings["servicename"],

2198

servicetype = "_mandos._tcp",

2199

protocol = protocol, bus = bus)

1895

2200

if server_settings["interface"]:

1896

2201

service.interface = (if_nametoindex

1897

2202

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

1901

2206

1902

2207

client_class = Client

1903

2208

if use_dbus:

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):

2209

client_class = functools.partial(ClientDBusTransitional,

2210

bus = bus)

2211

2212

client_settings = Client.config_parser(client_config)

2213

old_client_settings = {}

2214

clients_data = {}

2215

2216

# Get client data and settings from last running state.

2217

if server_settings["restore"]:

2218

try:

2219

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

2220

clients_data, old_client_settings = (pickle.load

2221

(stored_state))

2222

os.remove(stored_state_path)

2223

except IOError as e:

2224

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

2225

.format(e))

2226

if e.errno != errno.ENOENT:

2227

raise

2228

except EOFError as e:

2229

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

2230

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

2231

2232

with PGPEngine() as pgp:

2233

for client_name, client in clients_data.iteritems():

2234

# Decide which value to use after restoring saved state.

2235

# We have three different values: Old config file,

2236

# new config file, and saved state.

2237

# New config value takes precedence if it differs from old

2238

# config value, otherwise use saved state.

2239

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

2240

try:

2241

# For each value in new config, check if it

2242

# differs from the old config value (Except for

2243

# the "secret" attribute)

2244

if (name != "secret" and

2245

value != old_client_settings[client_name]

2246

[name]):

2247

client[name] = value

2248

except KeyError:

2249

pass

2250

2251

# Clients who has passed its expire date can still be

2252

# enabled if its last checker was successful. Clients

2253

# whose checker failed before we stored its state is

2254

# assumed to have failed all checkers during downtime.

2255

if client["enabled"]:

2256

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

2257

if not client["last_checked_ok"]:

2258

logger.warning(

2259

"disabling client {0} - Client never "

2260

"performed a successfull checker"

2261

.format(client["name"]))

2262

client["enabled"] = False

2263

elif client["last_checker_status"] != 0:

2264

logger.warning(

2265

"disabling client {0} - Client "

2266

"last checker failed with error code {1}"

2267

.format(client["name"],

2268

client["last_checker_status"]))

2269

client["enabled"] = False

2270

else:

2271

client["expires"] = (datetime.datetime

2272

.utcnow()

2273

+ client["timeout"])

2274

logger.debug("Last checker succeeded,"

2275

" keeping {0} enabled"

2276

.format(client["name"]))

1912

2277

try:

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()))

2278

client["secret"] = (

2279

pgp.decrypt(client["encrypted_secret"],

2280

client_settings[client_name]

2281

["secret"]))

2282

except PGPError:

2283

# If decryption fails, we use secret from new settings

2284

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

2285

.format(client_name))

2286

client["secret"] = (

2287

client_settings[client_name]["secret"])

2288

2289

2290

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

2291

for client_name in (set(old_client_settings)

2292

- set(client_settings)):

2293

del clients_data[client_name]

2294

for client_name in (set(client_settings)

2295

- set(old_client_settings)):

2296

clients_data[client_name] = client_settings[client_name]

2297

2298

# Create clients all clients

2299

for client_name, client in clients_data.iteritems():

2300

tcp_server.clients[client_name] = client_class(

2301

name = client_name, settings = client)

2302

1922

2303

if not tcp_server.clients:

1923

2304

logger.warning("No clients defined")

1924

2305

1935

2316

# "pidfile" was never created

1936

2317

pass

1937

2318

del pidfilename

1938

1939

2319

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

1940

2320

1941

2321

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

1946

2326

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

1947

2327

def __init__(self):

1948

2328

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

1949

_interface = "se.bsnet.fukt.Mandos"

2329

_interface = "se.recompile.Mandos"

1950

2330

1951

2331

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

1952

2332

def ClientAdded(self, objpath):

1967

2347

def GetAllClients(self):

1968

2348

"D-Bus method"

1969

2349

return dbus.Array(c.dbus_object_path

1970

for c in tcp_server.clients)

2350

for c in

2351

tcp_server.clients.itervalues())

1971

2352

1972

2353

@dbus.service.method(_interface,

1973

2354

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

1975

2356

"D-Bus method"

1976

2357

return dbus.Dictionary(

1977

2358

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

1978

for c in tcp_server.clients),

2359

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

1979

2360

signature="oa{sv}")

1980

2361

1981

2362

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

1982

2363

def RemoveClient(self, object_path):

1983

2364

"D-Bus method"

1984

for c in tcp_server.clients:

2365

for c in tcp_server.clients.itervalues():

1985

2366

if c.dbus_object_path == object_path:

1986

tcp_server.clients.remove(c)

2367

del tcp_server.clients[c.name]

1987

2368

c.remove_from_connection()

1988

2369

# Don't signal anything except ClientRemoved

1989

2370

c.disable(quiet=True)

1994

2375

1995

2376

del _interface

1996

2377

1997

mandos_dbus_service = MandosDBusService()

2378

class MandosDBusServiceTransitional(MandosDBusService):

2379

__metaclass__ = AlternateDBusNamesMetaclass

2380

mandos_dbus_service = MandosDBusServiceTransitional()

1998

2381

1999

2382

def cleanup():

2000

2383

"Cleanup function; run on exit"

2001

2384

service.cleanup()

2002

2385

2386

multiprocessing.active_children()

2387

if not (tcp_server.clients or client_settings):

2388

return

2389

2390

# Store client before exiting. Secrets are encrypted with key

2391

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

2392

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

2393

clients = {}

2394

with PGPEngine() as pgp:

2395

for client in tcp_server.clients.itervalues():

2396

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

2397

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

2398

key)

2399

client_dict = {}

2400

2401

# A list of attributes that can not be pickled

2402

# + secret.

2403

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

2404

"checker"))

2405

for name, typ in (inspect.getmembers

2406

(dbus.service.Object)):

2407

exclude.add(name)

2408

2409

client_dict["encrypted_secret"] = (client

2410

.encrypted_secret)

2411

for attr in client.client_structure:

2412

if attr not in exclude:

2413

client_dict[attr] = getattr(client, attr)

2414

2415

clients[client.name] = client_dict

2416

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

2417

2418

try:

2419

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

2420

prefix="clients-",

2421

dir=os.path.dirname

2422

(stored_state_path))

2423

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

2424

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

2425

os.rename(tempname, stored_state_path)

2426

except (IOError, OSError) as e:

2427

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

2428

.format(e))

2429

if not debug:

2430

try:

2431

os.remove(tempname)

2432

except NameError:

2433

pass

2434

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

2435

errno.EEXIST)):

2436

raise e

2437

2438

# Delete all clients, and settings from config

2003

2439

while tcp_server.clients:

2004

client = tcp_server.clients.pop()

2440

name, client = tcp_server.clients.popitem()

2005

2441

if use_dbus:

2006

2442

client.remove_from_connection()

2007

client.disable_hook = None

2008

2443

# Don't signal anything except ClientRemoved

2009

2444

client.disable(quiet=True)

2010

2445

if use_dbus:

2011

2446

# Emit D-Bus signal

2012

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2447

mandos_dbus_service.ClientRemoved(client

2448

.dbus_object_path,

2013

2449

client.name)

2450

client_settings.clear()

2014

2451

2015

2452

atexit.register(cleanup)

2016

2453

2017

for client in tcp_server.clients:

2454

for client in tcp_server.clients.itervalues():

2018

2455

if use_dbus:

2019

2456

# Emit D-Bus signal

2020

2457

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2021

client.enable()

2458

# Need to initiate checking of clients

2459

if client.enabled:

2460

client.init_checker()

2022

2461

2023

2462

tcp_server.enable()

2024

2463

tcp_server.server_activate()

2064

2503

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

2065

2504

cleanup()

2066

2505

2067

2068

2506

if __name__ == '__main__':

2069

2507

main()