/mandos/trunk : revision 815

1

#!/usr/bin/python2.7

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#!/usr/bin/python

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

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#

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

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

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#

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# Everything else is

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#

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

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

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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try:

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import ConfigParser as configparser

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except ImportError:

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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.9"

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version = "1.7.3"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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def __init__(self):

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

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self.gpg = "gpg"

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try:

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output = subprocess.check_output(["gpgconf"])

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for line in output.splitlines():

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name, text, path = line.split(":")

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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.format(self.name)))

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return ret

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# Pretend that we have a GnuTLS module

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class GnuTLS(object):

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"""This isn't so much a class as it is a module-like namespace.

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It is instantiated once, and simulates having a GnuTLS module."""

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_library = ctypes.cdll.LoadLibrary(

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ctypes.util.find_library("gnutls"))

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_need_version = "3.3.0"

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def __init__(self):

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# Need to use class name "GnuTLS" here, since this method is

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# called before the assignment to the "gnutls" global variable

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# happens.

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if GnuTLS.check_version(self._need_version) is None:

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raise GnuTLS.Error("Needs GnuTLS {} or later"

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.format(self._need_version))

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# Unless otherwise indicated, the constants and types below are

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# all from the gnutls/gnutls.h C header file.

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# Constants

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E_SUCCESS = 0

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E_INTERRUPTED = -52

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E_AGAIN = -28

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CRT_OPENPGP = 2

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CLIENT = 2

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SHUT_RDWR = 0

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CRD_CERTIFICATE = 1

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E_NO_CERTIFICATE_FOUND = -49

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OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

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# Types

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class session_int(ctypes.Structure):

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_fields_ = []

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session_t = ctypes.POINTER(session_int)

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class certificate_credentials_st(ctypes.Structure):

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_fields_ = []

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certificate_credentials_t = ctypes.POINTER(

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certificate_credentials_st)

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certificate_type_t = ctypes.c_int

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class datum_t(ctypes.Structure):

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_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),

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('size', ctypes.c_uint)]

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class openpgp_crt_int(ctypes.Structure):

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_fields_ = []

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openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

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openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

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log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)

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credentials_type_t = ctypes.c_int #

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transport_ptr_t = ctypes.c_void_p

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close_request_t = ctypes.c_int

493

494

# Exceptions

495

class Error(Exception):

496

# We need to use the class name "GnuTLS" here, since this

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# exception might be raised from within GnuTLS.__init__,

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# which is called before the assignment to the "gnutls"

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# global variable has happened.

500

def __init__(self, message = None, code = None, args=()):

501

# Default usage is by a message string, but if a return

502

# code is passed, convert it to a string with

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# gnutls.strerror()

504

self.code = code

505

if message is None and code is not None:

506

message = GnuTLS.strerror(code)

507

return super(GnuTLS.Error, self).__init__(

508

message, *args)

509

510

class CertificateSecurityError(Error):

511

pass

512

513

# Classes

514

class Credentials(object):

515

def __init__(self):

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self._c_object = gnutls.certificate_credentials_t()

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gnutls.certificate_allocate_credentials(

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ctypes.byref(self._c_object))

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self.type = gnutls.CRD_CERTIFICATE

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def __del__(self):

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gnutls.certificate_free_credentials(self._c_object)

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class ClientSession(object):

525

def __init__(self, socket, credentials = None):

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self._c_object = gnutls.session_t()

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gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)

528

gnutls.set_default_priority(self._c_object)

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gnutls.transport_set_ptr(self._c_object, socket.fileno())

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gnutls.handshake_set_private_extensions(self._c_object,

531

True)

532

self.socket = socket

533

if credentials is None:

534

credentials = gnutls.Credentials()

535

gnutls.credentials_set(self._c_object, credentials.type,

536

ctypes.cast(credentials._c_object,

537

ctypes.c_void_p))

538

self.credentials = credentials

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540

def __del__(self):

541

gnutls.deinit(self._c_object)

542

543

def handshake(self):

544

return gnutls.handshake(self._c_object)

545

546

def send(self, data):

547

data = bytes(data)

548

data_len = len(data)

549

while data_len > 0:

550

data_len -= gnutls.record_send(self._c_object,

551

data[-data_len:],

552

data_len)

553

554

def bye(self):

555

return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)

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557

# Error handling functions

558

def _error_code(result):

559

"""A function to raise exceptions on errors, suitable

560

for the 'restype' attribute on ctypes functions"""

561

if result >= 0:

562

return result

563

if result == gnutls.E_NO_CERTIFICATE_FOUND:

564

raise gnutls.CertificateSecurityError(code = result)

565

raise gnutls.Error(code = result)

566

567

def _retry_on_error(result, func, arguments):

568

"""A function to retry on some errors, suitable

569

for the 'errcheck' attribute on ctypes functions"""

570

while result < 0:

571

if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):

572

return _error_code(result)

573

result = func(*arguments)

574

return result

575

576

# Unless otherwise indicated, the function declarations below are

577

# all from the gnutls/gnutls.h C header file.

578

579

# Functions

580

priority_set_direct = _library.gnutls_priority_set_direct

581

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

582

ctypes.POINTER(ctypes.c_char_p)]

583

priority_set_direct.restype = _error_code

584

585

init = _library.gnutls_init

586

init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]

587

init.restype = _error_code

588

589

set_default_priority = _library.gnutls_set_default_priority

590

set_default_priority.argtypes = [session_t]

591

set_default_priority.restype = _error_code

592

593

record_send = _library.gnutls_record_send

594

record_send.argtypes = [session_t, ctypes.c_void_p,

595

ctypes.c_size_t]

596

record_send.restype = ctypes.c_ssize_t

597

record_send.errcheck = _retry_on_error

598

599

certificate_allocate_credentials = (

600

_library.gnutls_certificate_allocate_credentials)

601

certificate_allocate_credentials.argtypes = [

602

ctypes.POINTER(certificate_credentials_t)]

603

certificate_allocate_credentials.restype = _error_code

604

605

certificate_free_credentials = (

606

_library.gnutls_certificate_free_credentials)

607

certificate_free_credentials.argtypes = [certificate_credentials_t]

608

certificate_free_credentials.restype = None

609

610

handshake_set_private_extensions = (

611

_library.gnutls_handshake_set_private_extensions)

612

handshake_set_private_extensions.argtypes = [session_t,

613

ctypes.c_int]

614

handshake_set_private_extensions.restype = None

615

616

credentials_set = _library.gnutls_credentials_set

617

credentials_set.argtypes = [session_t, credentials_type_t,

618

ctypes.c_void_p]

619

credentials_set.restype = _error_code

620

621

strerror = _library.gnutls_strerror

622

strerror.argtypes = [ctypes.c_int]

623

strerror.restype = ctypes.c_char_p

624

625

certificate_type_get = _library.gnutls_certificate_type_get

626

certificate_type_get.argtypes = [session_t]

627

certificate_type_get.restype = _error_code

628

629

certificate_get_peers = _library.gnutls_certificate_get_peers

630

certificate_get_peers.argtypes = [session_t,

631

ctypes.POINTER(ctypes.c_uint)]

632

certificate_get_peers.restype = ctypes.POINTER(datum_t)

633

634

global_set_log_level = _library.gnutls_global_set_log_level

635

global_set_log_level.argtypes = [ctypes.c_int]

636

global_set_log_level.restype = None

637

638

global_set_log_function = _library.gnutls_global_set_log_function

639

global_set_log_function.argtypes = [log_func]

640

global_set_log_function.restype = None

641

642

deinit = _library.gnutls_deinit

643

deinit.argtypes = [session_t]

644

deinit.restype = None

645

646

handshake = _library.gnutls_handshake

647

handshake.argtypes = [session_t]

648

handshake.restype = _error_code

649

handshake.errcheck = _retry_on_error

650

651

transport_set_ptr = _library.gnutls_transport_set_ptr

652

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

653

transport_set_ptr.restype = None

654

655

bye = _library.gnutls_bye

656

bye.argtypes = [session_t, close_request_t]

657

bye.restype = _error_code

658

bye.errcheck = _retry_on_error

659

660

check_version = _library.gnutls_check_version

661

check_version.argtypes = [ctypes.c_char_p]

662

check_version.restype = ctypes.c_char_p

663

664

# All the function declarations below are from gnutls/openpgp.h

665

666

openpgp_crt_init = _library.gnutls_openpgp_crt_init

667

openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]

668

openpgp_crt_init.restype = _error_code

669

670

openpgp_crt_import = _library.gnutls_openpgp_crt_import

671

openpgp_crt_import.argtypes = [openpgp_crt_t,

672

ctypes.POINTER(datum_t),

673

openpgp_crt_fmt_t]

674

openpgp_crt_import.restype = _error_code

675

676

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

677

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

678

ctypes.POINTER(ctypes.c_uint)]

679

openpgp_crt_verify_self.restype = _error_code

680

681

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

682

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

683

openpgp_crt_deinit.restype = None

684

685

openpgp_crt_get_fingerprint = (

686

_library.gnutls_openpgp_crt_get_fingerprint)

687

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

688

ctypes.c_void_p,

689

ctypes.POINTER(

690

ctypes.c_size_t)]

691

openpgp_crt_get_fingerprint.restype = _error_code

692

693

# Remove non-public functions

694

del _error_code, _retry_on_error

695

# Create the global "gnutls" object, simulating a module

696

gnutls = GnuTLS()

697

438

698

def call_pipe(connection, # : multiprocessing.Connection

439

699

func, *args, **kwargs):

440

700

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

842

1102

access="r")

843

1103

def Property_dbus_property(self):

844

1104

return dbus.Boolean(False)

1105

1106

See also the DBusObjectWithAnnotations class.

845

1107

"""

846

1108

847

1109

def decorator(func):

869

1131

pass

870

1132

871

1133

872

class DBusObjectWithProperties(dbus.service.Object):

873

"""A D-Bus object with properties.

1134

class DBusObjectWithAnnotations(dbus.service.Object):

1135

"""A D-Bus object with annotations.

874

1136

875

Classes inheriting from this can use the dbus_service_property

876

decorator to expose methods as D-Bus properties. It exposes the

877

standard Get(), Set(), and GetAll() methods on the D-Bus.

1137

Classes inheriting from this can use the dbus_annotations

1138

decorator to add annotations to methods or signals.

878

1139

"""

879

1140

880

1141

@staticmethod

896

1157

for name, athing in

897

1158

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

898

1159

1160

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1161

out_signature = "s",

1162

path_keyword = 'object_path',

1163

connection_keyword = 'connection')

1164

def Introspect(self, object_path, connection):

1165

"""Overloading of standard D-Bus method.

1166

1167

Inserts annotation tags on methods and signals.

1168

"""

1169

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

1170

connection)

1171

try:

1172

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

1173

1174

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

1175

# Add annotation tags

1176

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

1177

for tag in if_tag.getElementsByTagName(typ):

1178

annots = dict()

1179

for name, prop in (self.

1180

_get_all_dbus_things(typ)):

1181

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

1182

and prop._dbus_interface

1183

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

1184

annots.update(getattr(

1185

prop, "_dbus_annotations", {}))

1186

for name, value in annots.items():

1187

ann_tag = document.createElement(

1188

"annotation")

1189

ann_tag.setAttribute("name", name)

1190

ann_tag.setAttribute("value", value)

1191

tag.appendChild(ann_tag)

1192

# Add interface annotation tags

1193

for annotation, value in dict(

1194

itertools.chain.from_iterable(

1195

annotations().items()

1196

for name, annotations

1197

in self._get_all_dbus_things("interface")

1198

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

1199

)).items():

1200

ann_tag = document.createElement("annotation")

1201

ann_tag.setAttribute("name", annotation)

1202

ann_tag.setAttribute("value", value)

1203

if_tag.appendChild(ann_tag)

1204

# Fix argument name for the Introspect method itself

1205

if (if_tag.getAttribute("name")

1206

== dbus.INTROSPECTABLE_IFACE):

1207

for cn in if_tag.getElementsByTagName("method"):

1208

if cn.getAttribute("name") == "Introspect":

1209

for arg in cn.getElementsByTagName("arg"):

1210

if (arg.getAttribute("direction")

1211

== "out"):

1212

arg.setAttribute("name",

1213

"xml_data")

1214

xmlstring = document.toxml("utf-8")

1215

document.unlink()

1216

except (AttributeError, xml.dom.DOMException,

1217

xml.parsers.expat.ExpatError) as error:

1218

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

1219

exc_info=error)

1220

return xmlstring

1221

1222

1223

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1224

"""A D-Bus object with properties.

1225

1226

Classes inheriting from this can use the dbus_service_property

1227

decorator to expose methods as D-Bus properties. It exposes the

1228

standard Get(), Set(), and GetAll() methods on the D-Bus.

1229

"""

1230

899

1231

def _get_dbus_property(self, interface_name, property_name):

900

1232

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

901

1233

property with the specified name and interface.

911

1243

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

912

1244

self.dbus_object_path, interface_name, property_name))

913

1245

1246

@classmethod

1247

def _get_all_interface_names(cls):

1248

"""Get a sequence of all interfaces supported by an object"""

1249

return (name for name in set(getattr(getattr(x, attr),

1250

"_dbus_interface", None)

1251

for x in (inspect.getmro(cls))

1252

for attr in dir(x))

1253

if name is not None)

1254

914

1255

@dbus.service.method(dbus.PROPERTIES_IFACE,

915

1256

in_signature="ss",

916

1257

out_signature="v")

986

1327

987

1328

Inserts property tags and interface annotation tags.

988

1329

"""

989

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

990

connection)

1330

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1331

object_path,

1332

connection)

991

1333

try:

992

1334

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

993

1335

1006

1348

if prop._dbus_interface

1007

1349

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

1008

1350

if_tag.appendChild(tag)

1009

# Add annotation tags

1010

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

1011

for tag in if_tag.getElementsByTagName(typ):

1012

annots = dict()

1013

for name, prop in (self.

1014

_get_all_dbus_things(typ)):

1015

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

1016

and prop._dbus_interface

1017

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

1018

annots.update(getattr(

1019

prop, "_dbus_annotations", {}))

1020

for name, value in annots.items():

1021

ann_tag = document.createElement(

1022

"annotation")

1023

ann_tag.setAttribute("name", name)

1024

ann_tag.setAttribute("value", value)

1025

tag.appendChild(ann_tag)

1026

# Add interface annotation tags

1027

for annotation, value in dict(

1028

itertools.chain.from_iterable(

1029

annotations().items()

1030

for name, annotations

1031

in self._get_all_dbus_things("interface")

1032

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

1033

)).items():

1034

ann_tag = document.createElement("annotation")

1035

ann_tag.setAttribute("name", annotation)

1036

ann_tag.setAttribute("value", value)

1037

if_tag.appendChild(ann_tag)

1351

# Add annotation tags for properties

1352

for tag in if_tag.getElementsByTagName("property"):

1353

annots = dict()

1354

for name, prop in self._get_all_dbus_things(

1355

"property"):

1356

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

1357

and prop._dbus_interface

1358

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

1359

annots.update(getattr(

1360

prop, "_dbus_annotations", {}))

1361

for name, value in annots.items():

1362

ann_tag = document.createElement(

1363

"annotation")

1364

ann_tag.setAttribute("name", name)

1365

ann_tag.setAttribute("value", value)

1366

tag.appendChild(ann_tag)

1038

1367

# Add the names to the return values for the

1039

1368

# "org.freedesktop.DBus.Properties" methods

1040

1369

if (if_tag.getAttribute("name")

1058

1387

exc_info=error)

1059

1388

return xmlstring

1060

1389

1390

try:

1391

dbus.OBJECT_MANAGER_IFACE

1392

except AttributeError:

1393

dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"

1394

1395

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1396

"""A D-Bus object with an ObjectManager.

1397

1398

Classes inheriting from this exposes the standard

1399

GetManagedObjects call and the InterfacesAdded and

1400

InterfacesRemoved signals on the standard

1401

"org.freedesktop.DBus.ObjectManager" interface.

1402

1403

Note: No signals are sent automatically; they must be sent

1404

manually.

1405

"""

1406

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1407

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

1408

def GetManagedObjects(self):

1409

"""This function must be overridden"""

1410

raise NotImplementedError()

1411

1412

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1413

signature = "oa{sa{sv}}")

1414

def InterfacesAdded(self, object_path, interfaces_and_properties):

1415

pass

1416

1417

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")

1418

def InterfacesRemoved(self, object_path, interfaces):

1419

pass

1420

1421

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1422

out_signature = "s",

1423

path_keyword = 'object_path',

1424

connection_keyword = 'connection')

1425

def Introspect(self, object_path, connection):

1426

"""Overloading of standard D-Bus method.

1427

1428

Override return argument name of GetManagedObjects to be

1429

"objpath_interfaces_and_properties"

1430

"""

1431

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1432

object_path,

1433

connection)

1434

try:

1435

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

1436

1437

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

1438

# Fix argument name for the GetManagedObjects method

1439

if (if_tag.getAttribute("name")

1440

== dbus.OBJECT_MANAGER_IFACE):

1441

for cn in if_tag.getElementsByTagName("method"):

1442

if (cn.getAttribute("name")

1443

== "GetManagedObjects"):

1444

for arg in cn.getElementsByTagName("arg"):

1445

if (arg.getAttribute("direction")

1446

== "out"):

1447

arg.setAttribute(

1448

"name",

1449

"objpath_interfaces"

1450

"_and_properties")

1451

xmlstring = document.toxml("utf-8")

1452

document.unlink()

1453

except (AttributeError, xml.dom.DOMException,

1454

xml.parsers.expat.ExpatError) as error:

1455

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

1456

exc_info = error)

1457

return xmlstring

1061

1458

1062

1459

def datetime_to_dbus(dt, variant_level=0):

1063

1460

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

1154

1551

func1 and func2 to the "call_both" function

1155

1552

outside of its arguments"""

1156

1553

1554

@functools.wraps(func2)

1157

1555

def call_both(*args, **kwargs):

1158

1556

"""This function will emit two D-Bus

1159

1557

signals by calling func1 and func2"""

1160

1558

func1(*args, **kwargs)

1161

1559

func2(*args, **kwargs)

1560

# Make wrapper function look like a D-Bus signal

1561

for name, attr in inspect.getmembers(func2):

1562

if name.startswith("_dbus_"):

1563

setattr(call_both, name, attr)

1162

1564

1163

1565

return call_both

1164

1566

# Create the "call_both" function and add it to

1738

2140

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

1739

2141

self.server.child_pipe.fileno())

1740

2142

1741

session = gnutls.connection.ClientSession(

1742

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

1743

1744

# Note: gnutls.connection.X509Credentials is really a

1745

# generic GnuTLS certificate credentials object so long as

1746

# no X.509 keys are added to it. Therefore, we can use it

1747

# here despite using OpenPGP certificates.

2143

session = gnutls.ClientSession(self.request)

1748

2144

1749

2145

#priority = ':'.join(("NONE", "+VERS-TLS1.1",

1750

2146

# "+AES-256-CBC", "+SHA1",

1754

2150

priority = self.server.gnutls_priority

1755

2151

if priority is None:

1756

2152

priority = "NORMAL"

1757

gnutls.library.functions.gnutls_priority_set_direct(

1758

session._c_object, priority, None)

2153

gnutls.priority_set_direct(session._c_object, priority,

2154

None)

1759

2155

1760

2156

# Start communication using the Mandos protocol

1761

2157

# Get protocol number

1771

2167

# Start GnuTLS connection

1772

2168

try:

1773

2169

session.handshake()

1774

except gnutls.errors.GNUTLSError as error:

2170

except gnutls.Error as error:

1775

2171

logger.warning("Handshake failed: %s", error)

1776

2172

# Do not run session.bye() here: the session is not

1777

2173

# established. Just abandon the request.

1783

2179

try:

1784

2180

fpr = self.fingerprint(

1785

2181

self.peer_certificate(session))

1786

except (TypeError,

1787

gnutls.errors.GNUTLSError) as error:

2182

except (TypeError, gnutls.Error) as error:

1788

2183

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

1789

2184

return

1790

2185

logger.debug("Fingerprint: %s", fpr)

1848

2243

else:

1849

2244

delay -= time2 - time

1850

2245

1851

sent_size = 0

1852

while sent_size < len(client.secret):

1853

try:

1854

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

1855

except gnutls.errors.GNUTLSError as error:

1856

logger.warning("gnutls send failed",

1857

exc_info=error)

1858

return

1859

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

1860

len(client.secret) - (sent_size

1861

+ sent))

1862

sent_size += sent

2246

try:

2247

session.send(client.secret)

2248

except gnutls.Error as error:

2249

logger.warning("gnutls send failed",

2250

exc_info = error)

2251

return

1863

2252

1864

2253

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

1865

2254

# bump the timeout using extended_timeout

1873

2262

client.approvals_pending -= 1

1874

2263

try:

1875

2264

session.bye()

1876

except gnutls.errors.GNUTLSError as error:

2265

except gnutls.Error as error:

1877

2266

logger.warning("GnuTLS bye failed",

1878

2267

exc_info=error)

1879

2268

1881

2270

def peer_certificate(session):

1882

2271

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

1883

2272

# If not an OpenPGP certificate...

1884

if (gnutls.library.functions.gnutls_certificate_type_get(

1885

session._c_object)

1886

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1887

# ...do the normal thing

1888

return session.peer_certificate

2273

if (gnutls.certificate_type_get(session._c_object)

2274

!= gnutls.CRT_OPENPGP):

2275

# ...return invalid data

2276

return b""

1889

2277

list_size = ctypes.c_uint(1)

1890

cert_list = (gnutls.library.functions

1891

.gnutls_certificate_get_peers

2278

cert_list = (gnutls.certificate_get_peers

1892

2279

(session._c_object, ctypes.byref(list_size)))

1893

2280

if not bool(cert_list) and list_size.value != 0:

1894

raise gnutls.errors.GNUTLSError("error getting peer"

1895

" certificate")

2281

raise gnutls.Error("error getting peer certificate")

1896

2282

if list_size.value == 0:

1897

2283

return None

1898

2284

cert = cert_list[0]

1902

2288

def fingerprint(openpgp):

1903

2289

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1904

2290

# New GnuTLS "datum" with the OpenPGP public key

1905

datum = gnutls.library.types.gnutls_datum_t(

2291

datum = gnutls.datum_t(

1906

2292

ctypes.cast(ctypes.c_char_p(openpgp),

1907

2293

ctypes.POINTER(ctypes.c_ubyte)),

1908

2294

ctypes.c_uint(len(openpgp)))

1909

2295

# New empty GnuTLS certificate

1910

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1911

gnutls.library.functions.gnutls_openpgp_crt_init(

1912

ctypes.byref(crt))

2296

crt = gnutls.openpgp_crt_t()

2297

gnutls.openpgp_crt_init(ctypes.byref(crt))

1913

2298

# Import the OpenPGP public key into the certificate

1914

gnutls.library.functions.gnutls_openpgp_crt_import(

1915

crt, ctypes.byref(datum),

1916

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

2299

gnutls.openpgp_crt_import(crt, ctypes.byref(datum),

2300

gnutls.OPENPGP_FMT_RAW)

1917

2301

# Verify the self signature in the key

1918

2302

crtverify = ctypes.c_uint()

1919

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1920

crt, 0, ctypes.byref(crtverify))

2303

gnutls.openpgp_crt_verify_self(crt, 0,

2304

ctypes.byref(crtverify))

1921

2305

if crtverify.value != 0:

1922

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1923

raise gnutls.errors.CertificateSecurityError(

1924

"Verify failed")

2306

gnutls.openpgp_crt_deinit(crt)

2307

raise gnutls.CertificateSecurityError("Verify failed")

1925

2308

# New buffer for the fingerprint

1926

2309

buf = ctypes.create_string_buffer(20)

1927

2310

buf_len = ctypes.c_size_t()

1928

2311

# Get the fingerprint from the certificate into the buffer

1929

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1930

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

2312

gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),

2313

ctypes.byref(buf_len))

1931

2314

# Deinit the certificate

1932

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2315

gnutls.openpgp_crt_deinit(crt)

1933

2316

# Convert the buffer to a Python bytestring

1934

2317

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

1935

2318

# Convert the bytestring to hexadecimal notation

2561

2944

2562

2945

# "Use a log level over 10 to enable all debugging options."

2563

2946

# - GnuTLS manual

2564

gnutls.library.functions.gnutls_global_set_log_level(11)

2947

gnutls.global_set_log_level(11)

2565

2948

2566

@gnutls.library.types.gnutls_log_func

2949

@gnutls.log_func

2567

2950

def debug_gnutls(level, string):

2568

2951

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

2569

2952

2570

gnutls.library.functions.gnutls_global_set_log_function(

2571

debug_gnutls)

2953

gnutls.global_set_log_function(debug_gnutls)

2572

2954

2573

2955

# Redirect stdin so all checkers get /dev/null

2574

2956

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

2753

3135

2754

3136

@alternate_dbus_interfaces(

2755

3137

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

2756

class MandosDBusService(DBusObjectWithProperties):

3138

class MandosDBusService(DBusObjectWithObjectManager):

2757

3139

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

2758

3140

2759

3141

def __init__(self):

2761

3143

2762

3144

_interface = "se.recompile.Mandos"

2763

3145

2764

@dbus_interface_annotations(_interface)

2765

def _foo(self):

2766

return {

2767

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

2768

"false" }

2769

2770

3146

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

2771

3147

def ClientAdded(self, objpath):

2772

3148

"D-Bus signal"

2777

3153

"D-Bus signal"

2778

3154

pass

2779

3155

3156

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

3157

"true"})

2780

3158

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

2781

3159

def ClientRemoved(self, objpath, name):

2782

3160

"D-Bus signal"

2783

3161

pass

2784

3162

3163

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

3164

"true"})

2785

3165

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

2786

3166

def GetAllClients(self):

2787

3167

"D-Bus method"

2788

3168

return dbus.Array(c.dbus_object_path for c in

2789

3169

tcp_server.clients.itervalues())

2790

3170

3171

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

3172

"true"})

2791

3173

@dbus.service.method(_interface,

2792

3174

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

2793

3175

def GetAllClientsWithProperties(self):

2794

3176

"D-Bus method"

2795

3177

return dbus.Dictionary(

2796

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

3178

{ c.dbus_object_path: c.GetAll(

3179

"se.recompile.Mandos.Client")

2797

3180

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

2798

3181

signature="oa{sv}")

2799

3182

2804

3187

if c.dbus_object_path == object_path:

2805

3188

del tcp_server.clients[c.name]

2806

3189

c.remove_from_connection()

2807

# Don't signal anything except ClientRemoved

3190

# Don't signal the disabling

2808

3191

c.disable(quiet=True)

2809

# Emit D-Bus signal

2810

self.ClientRemoved(object_path, c.name)

3192

# Emit D-Bus signal for removal

3193

self.client_removed_signal(c)

2811

3194

return

2812

3195

raise KeyError(object_path)

2813

3196

2814

3197

del _interface

3198

3199

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3200

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

3201

def GetManagedObjects(self):

3202

"""D-Bus method"""

3203

return dbus.Dictionary(

3204

{ client.dbus_object_path:

3205

dbus.Dictionary(

3206

{ interface: client.GetAll(interface)

3207

for interface in

3208

client._get_all_interface_names()})

3209

for client in tcp_server.clients.values()})

3210

3211

def client_added_signal(self, client):

3212

"""Send the new standard signal and the old signal"""

3213

if use_dbus:

3214

# New standard signal

3215

self.InterfacesAdded(

3216

client.dbus_object_path,

3217

dbus.Dictionary(

3218

{ interface: client.GetAll(interface)

3219

for interface in

3220

client._get_all_interface_names()}))

3221

# Old signal

3222

self.ClientAdded(client.dbus_object_path)

3223

3224

def client_removed_signal(self, client):

3225

"""Send the new standard signal and the old signal"""

3226

if use_dbus:

3227

# New standard signal

3228

self.InterfacesRemoved(

3229

client.dbus_object_path,

3230

client._get_all_interface_names())

3231

# Old signal

3232

self.ClientRemoved(client.dbus_object_path,

3233

client.name)

2815

3234

2816

3235

mandos_dbus_service = MandosDBusService()

2817

3236

2882

3301

name, client = tcp_server.clients.popitem()

2883

3302

if use_dbus:

2884

3303

client.remove_from_connection()

2885

# Don't signal anything except ClientRemoved

3304

# Don't signal the disabling

2886

3305

client.disable(quiet=True)

3306

# Emit D-Bus signal for removal

2887

3307

if use_dbus:

2888

# Emit D-Bus signal

2889

mandos_dbus_service.ClientRemoved(

2890

client.dbus_object_path, client.name)

3308

mandos_dbus_service.client_removed_signal(client)

2891

3309

client_settings.clear()

2892

3310

2893

3311

atexit.register(cleanup)

2894

3312

2895

3313

for client in tcp_server.clients.itervalues():

2896

3314

if use_dbus:

2897

# Emit D-Bus signal

2898

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3315

# Emit D-Bus signal for adding

3316

mandos_dbus_service.client_added_signal(client)

2899

3317

# Need to initiate checking of clients

2900

3318

if client.enabled:

2901

3319

client.init_checker()