70
import cPickle as pickle
63
import cPickle as pickle
73
64
import multiprocessing
85
68
import dbus.service
87
from gi.repository import GLib
88
71
from dbus.mainloop.glib import DBusGMainLoop
91
74
import xml.dom.minidom
94
if sys.version_info.major == 2:
98
# Add collections.abc.Callable if it does not exist
100
collections.abc.Callable
101
except AttributeError:
103
Callable = collections.Callable
104
collections.abc = abc
107
# Add shlex.quote if it does not exist
110
except AttributeError:
111
shlex.quote = re.escape
113
# Show warnings by default
114
if not sys.warnoptions:
116
warnings.simplefilter("default")
118
# Try to find the value of SO_BINDTODEVICE:
120
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
121
# newer, and it is also the most natural place for it:
122
78
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
123
79
except AttributeError:
125
# This is where SO_BINDTODEVICE was up to and including Python
127
81
from IN import SO_BINDTODEVICE
128
82
except ImportError:
129
# In Python 2.7 it seems to have been removed entirely.
130
# Try running the C preprocessor:
132
cc = subprocess.Popen(["cc", "--language=c", "-E",
134
stdin=subprocess.PIPE,
135
stdout=subprocess.PIPE)
136
stdout = cc.communicate(
137
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
138
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
139
except (OSError, ValueError, IndexError):
141
SO_BINDTODEVICE = None
143
if sys.version_info < (3, 2):
144
configparser.Configparser = configparser.SafeConfigParser
147
stored_state_file = "clients.pickle"
149
logger = logging.getLogger()
150
logging.captureWarnings(True) # Show warnings via the logging system
154
if_nametoindex = ctypes.cdll.LoadLibrary(
155
ctypes.util.find_library("c")).if_nametoindex
156
except (OSError, AttributeError):
158
def if_nametoindex(interface):
159
"Get an interface index the hard way, i.e. using fcntl()"
160
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
161
with contextlib.closing(socket.socket()) as s:
162
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
163
struct.pack(b"16s16x", interface))
164
interface_index = struct.unpack("I", ifreq[16:20])[0]
165
return interface_index
168
def copy_function(func):
169
"""Make a copy of a function"""
170
if sys.version_info.major == 2:
171
return types.FunctionType(func.func_code,
177
return types.FunctionType(func.__code__,
184
def initlogger(debug, level=logging.WARNING):
185
"""init logger and add loglevel"""
188
syslogger = (logging.handlers.SysLogHandler(
189
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
191
syslogger.setFormatter(logging.Formatter
192
('Mandos [%(process)d]: %(levelname)s:'
194
logger.addHandler(syslogger)
197
console = logging.StreamHandler()
198
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
202
logger.addHandler(console)
203
logger.setLevel(level)
206
class PGPError(Exception):
207
"""Exception if encryption/decryption fails"""
212
"""A simple class for OpenPGP symmetric encryption & decryption"""
215
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
218
output = subprocess.check_output(["gpgconf"])
219
for line in output.splitlines():
220
name, text, path = line.split(b":")
225
if e.errno != errno.ENOENT:
227
self.gnupgargs = ['--batch',
228
'--homedir', self.tempdir,
231
# Only GPG version 1 has the --no-use-agent option.
232
if self.gpg == b"gpg" or self.gpg.endswith(b"/gpg"):
233
self.gnupgargs.append("--no-use-agent")
238
def __exit__(self, exc_type, exc_value, traceback):
246
if self.tempdir is not None:
247
# Delete contents of tempdir
248
for root, dirs, files in os.walk(self.tempdir,
250
for filename in files:
251
os.remove(os.path.join(root, filename))
253
os.rmdir(os.path.join(root, dirname))
255
os.rmdir(self.tempdir)
258
def password_encode(self, password):
259
# Passphrase can not be empty and can not contain newlines or
260
# NUL bytes. So we prefix it and hex encode it.
261
encoded = b"mandos" + binascii.hexlify(password)
262
if len(encoded) > 2048:
263
# GnuPG can't handle long passwords, so encode differently
264
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
265
.replace(b"\n", b"\\n")
266
.replace(b"\0", b"\\x00"))
269
def encrypt(self, data, password):
270
passphrase = self.password_encode(password)
271
with tempfile.NamedTemporaryFile(
272
dir=self.tempdir) as passfile:
273
passfile.write(passphrase)
275
proc = subprocess.Popen([self.gpg, '--symmetric',
279
stdin=subprocess.PIPE,
280
stdout=subprocess.PIPE,
281
stderr=subprocess.PIPE)
282
ciphertext, err = proc.communicate(input=data)
283
if proc.returncode != 0:
287
def decrypt(self, data, password):
288
passphrase = self.password_encode(password)
289
with tempfile.NamedTemporaryFile(
290
dir=self.tempdir) as passfile:
291
passfile.write(passphrase)
293
proc = subprocess.Popen([self.gpg, '--decrypt',
297
stdin=subprocess.PIPE,
298
stdout=subprocess.PIPE,
299
stderr=subprocess.PIPE)
300
decrypted_plaintext, err = proc.communicate(input=data)
301
if proc.returncode != 0:
303
return decrypted_plaintext
306
# Pretend that we have an Avahi module
308
"""This isn't so much a class as it is a module-like namespace."""
309
IF_UNSPEC = -1 # avahi-common/address.h
310
PROTO_UNSPEC = -1 # avahi-common/address.h
311
PROTO_INET = 0 # avahi-common/address.h
312
PROTO_INET6 = 1 # avahi-common/address.h
313
DBUS_NAME = "org.freedesktop.Avahi"
314
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
315
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
316
DBUS_PATH_SERVER = "/"
319
def string_array_to_txt_array(t):
320
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
321
for s in t), signature="ay")
322
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
323
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
324
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
325
SERVER_INVALID = 0 # avahi-common/defs.h
326
SERVER_REGISTERING = 1 # avahi-common/defs.h
327
SERVER_RUNNING = 2 # avahi-common/defs.h
328
SERVER_COLLISION = 3 # avahi-common/defs.h
329
SERVER_FAILURE = 4 # avahi-common/defs.h
83
SO_BINDTODEVICE = None
88
#logger = logging.getLogger('mandos')
89
logger = logging.Logger('mandos')
90
syslogger = (logging.handlers.SysLogHandler
91
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
92
address = str("/dev/log")))
93
syslogger.setFormatter(logging.Formatter
94
('Mandos [%(process)d]: %(levelname)s:'
96
logger.addHandler(syslogger)
98
console = logging.StreamHandler()
99
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
102
logger.addHandler(console)
332
104
class AvahiError(Exception):
333
105
def __init__(self, value, *args, **kwargs):
334
106
self.value = value
335
return super(AvahiError, self).__init__(value, *args,
107
super(AvahiError, self).__init__(value, *args, **kwargs)
108
def __unicode__(self):
109
return unicode(repr(self.value))
339
111
class AvahiServiceError(AvahiError):
343
114
class AvahiGroupError(AvahiError):
118
class AvahiService(object):
348
119
"""An Avahi (Zeroconf) service.
351
122
interface: integer; avahi.IF_UNSPEC or an interface index.
352
123
Used to optionally bind to the specified interface.
353
124
name: string; Example: 'Mandos'
354
125
type: string; Example: '_mandos._tcp'.
355
See <https://www.iana.org/assignments/service-names-port-numbers>
126
See <http://www.dns-sd.org/ServiceTypes.html>
356
127
port: integer; what port to announce
357
128
TXT: list of strings; TXT record for the service
358
129
domain: string; Domain to publish on, default to .local if empty.
517
261
follow_name_owner_changes=True),
518
262
avahi.DBUS_INTERFACE_SERVER)
519
263
self.server.connect_to_signal("StateChanged",
520
self.server_state_changed)
264
self.server_state_changed)
521
265
self.server_state_changed(self.server.GetState())
524
class AvahiServiceToSyslog(AvahiService):
525
def rename(self, *args, **kwargs):
526
"""Add the new name to the syslog messages"""
527
ret = super(AvahiServiceToSyslog, self).rename(*args,
529
syslogger.setFormatter(logging.Formatter(
530
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
535
# Pretend that we have a GnuTLS module
537
"""This isn't so much a class as it is a module-like namespace."""
539
library = ctypes.util.find_library("gnutls")
541
library = ctypes.util.find_library("gnutls-deb0")
542
_library = ctypes.cdll.LoadLibrary(library)
545
# Unless otherwise indicated, the constants and types below are
546
# all from the gnutls/gnutls.h C header file.
557
E_NO_CERTIFICATE_FOUND = -49
562
KEYID_USE_SHA256 = 1 # gnutls/x509.h
563
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
566
class _session_int(ctypes.Structure):
568
session_t = ctypes.POINTER(_session_int)
570
class certificate_credentials_st(ctypes.Structure):
572
certificate_credentials_t = ctypes.POINTER(
573
certificate_credentials_st)
574
certificate_type_t = ctypes.c_int
576
class datum_t(ctypes.Structure):
577
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
578
('size', ctypes.c_uint)]
580
class _openpgp_crt_int(ctypes.Structure):
582
openpgp_crt_t = ctypes.POINTER(_openpgp_crt_int)
583
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
584
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
585
credentials_type_t = ctypes.c_int
586
transport_ptr_t = ctypes.c_void_p
587
close_request_t = ctypes.c_int
590
class Error(Exception):
591
def __init__(self, message=None, code=None, args=()):
592
# Default usage is by a message string, but if a return
593
# code is passed, convert it to a string with
596
if message is None and code is not None:
597
message = gnutls.strerror(code).decode(
598
"utf-8", errors="replace")
599
return super(gnutls.Error, self).__init__(
602
class CertificateSecurityError(Error):
606
def __init__(self, cls):
609
def from_param(self, obj):
610
if not isinstance(obj, self.cls):
611
raise TypeError("Not of type {}: {!r}"
612
.format(self.cls.__name__, obj))
613
return ctypes.byref(obj.from_param(obj))
615
class CastToVoidPointer:
616
def __init__(self, cls):
619
def from_param(self, obj):
620
if not isinstance(obj, self.cls):
621
raise TypeError("Not of type {}: {!r}"
622
.format(self.cls.__name__, obj))
623
return ctypes.cast(obj.from_param(obj), ctypes.c_void_p)
625
class With_from_param:
627
def from_param(cls, obj):
628
return obj._as_parameter_
631
class Credentials(With_from_param):
633
self._as_parameter_ = gnutls.certificate_credentials_t()
634
gnutls.certificate_allocate_credentials(self)
635
self.type = gnutls.CRD_CERTIFICATE
638
gnutls.certificate_free_credentials(self)
640
class ClientSession(With_from_param):
641
def __init__(self, socket, credentials=None):
642
self._as_parameter_ = gnutls.session_t()
643
gnutls_flags = gnutls.CLIENT
644
if gnutls.check_version(b"3.5.6"):
645
gnutls_flags |= gnutls.NO_TICKETS
647
gnutls_flags |= gnutls.ENABLE_RAWPK
648
gnutls.init(self, gnutls_flags)
650
gnutls.set_default_priority(self)
651
gnutls.transport_set_ptr(self, socket.fileno())
652
gnutls.handshake_set_private_extensions(self, True)
654
if credentials is None:
655
credentials = gnutls.Credentials()
656
gnutls.credentials_set(self, credentials.type,
658
self.credentials = credentials
664
return gnutls.handshake(self)
666
def send(self, data):
670
data_len -= gnutls.record_send(self, data[-data_len:],
674
return gnutls.bye(self, gnutls.SHUT_RDWR)
676
# Error handling functions
677
def _error_code(result):
678
"""A function to raise exceptions on errors, suitable
679
for the 'restype' attribute on ctypes functions"""
680
if result >= gnutls.E_SUCCESS:
682
if result == gnutls.E_NO_CERTIFICATE_FOUND:
683
raise gnutls.CertificateSecurityError(code=result)
684
raise gnutls.Error(code=result)
686
def _retry_on_error(result, func, arguments,
687
_error_code=_error_code):
688
"""A function to retry on some errors, suitable
689
for the 'errcheck' attribute on ctypes functions"""
690
while result < gnutls.E_SUCCESS:
691
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
692
return _error_code(result)
693
result = func(*arguments)
696
# Unless otherwise indicated, the function declarations below are
697
# all from the gnutls/gnutls.h C header file.
700
priority_set_direct = _library.gnutls_priority_set_direct
701
priority_set_direct.argtypes = [ClientSession, ctypes.c_char_p,
702
ctypes.POINTER(ctypes.c_char_p)]
703
priority_set_direct.restype = _error_code
705
init = _library.gnutls_init
706
init.argtypes = [PointerTo(ClientSession), ctypes.c_int]
707
init.restype = _error_code
709
set_default_priority = _library.gnutls_set_default_priority
710
set_default_priority.argtypes = [ClientSession]
711
set_default_priority.restype = _error_code
713
record_send = _library.gnutls_record_send
714
record_send.argtypes = [ClientSession, ctypes.c_void_p,
716
record_send.restype = ctypes.c_ssize_t
717
record_send.errcheck = _retry_on_error
719
certificate_allocate_credentials = (
720
_library.gnutls_certificate_allocate_credentials)
721
certificate_allocate_credentials.argtypes = [
722
PointerTo(Credentials)]
723
certificate_allocate_credentials.restype = _error_code
725
certificate_free_credentials = (
726
_library.gnutls_certificate_free_credentials)
727
certificate_free_credentials.argtypes = [Credentials]
728
certificate_free_credentials.restype = None
730
handshake_set_private_extensions = (
731
_library.gnutls_handshake_set_private_extensions)
732
handshake_set_private_extensions.argtypes = [ClientSession,
734
handshake_set_private_extensions.restype = None
736
credentials_set = _library.gnutls_credentials_set
737
credentials_set.argtypes = [ClientSession, credentials_type_t,
738
CastToVoidPointer(Credentials)]
739
credentials_set.restype = _error_code
741
strerror = _library.gnutls_strerror
742
strerror.argtypes = [ctypes.c_int]
743
strerror.restype = ctypes.c_char_p
745
certificate_type_get = _library.gnutls_certificate_type_get
746
certificate_type_get.argtypes = [ClientSession]
747
certificate_type_get.restype = _error_code
749
certificate_get_peers = _library.gnutls_certificate_get_peers
750
certificate_get_peers.argtypes = [ClientSession,
751
ctypes.POINTER(ctypes.c_uint)]
752
certificate_get_peers.restype = ctypes.POINTER(datum_t)
754
global_set_log_level = _library.gnutls_global_set_log_level
755
global_set_log_level.argtypes = [ctypes.c_int]
756
global_set_log_level.restype = None
758
global_set_log_function = _library.gnutls_global_set_log_function
759
global_set_log_function.argtypes = [log_func]
760
global_set_log_function.restype = None
762
deinit = _library.gnutls_deinit
763
deinit.argtypes = [ClientSession]
764
deinit.restype = None
766
handshake = _library.gnutls_handshake
767
handshake.argtypes = [ClientSession]
768
handshake.restype = ctypes.c_int
769
handshake.errcheck = _retry_on_error
771
transport_set_ptr = _library.gnutls_transport_set_ptr
772
transport_set_ptr.argtypes = [ClientSession, transport_ptr_t]
773
transport_set_ptr.restype = None
775
bye = _library.gnutls_bye
776
bye.argtypes = [ClientSession, close_request_t]
777
bye.restype = ctypes.c_int
778
bye.errcheck = _retry_on_error
780
check_version = _library.gnutls_check_version
781
check_version.argtypes = [ctypes.c_char_p]
782
check_version.restype = ctypes.c_char_p
784
_need_version = b"3.3.0"
785
if check_version(_need_version) is None:
786
raise self.Error("Needs GnuTLS {} or later"
787
.format(_need_version))
789
_tls_rawpk_version = b"3.6.6"
790
has_rawpk = bool(check_version(_tls_rawpk_version))
794
class pubkey_st(ctypes.Structure):
796
pubkey_t = ctypes.POINTER(pubkey_st)
798
x509_crt_fmt_t = ctypes.c_int
800
# All the function declarations below are from
802
pubkey_init = _library.gnutls_pubkey_init
803
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
804
pubkey_init.restype = _error_code
806
pubkey_import = _library.gnutls_pubkey_import
807
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
809
pubkey_import.restype = _error_code
811
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
812
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
813
ctypes.POINTER(ctypes.c_ubyte),
814
ctypes.POINTER(ctypes.c_size_t)]
815
pubkey_get_key_id.restype = _error_code
817
pubkey_deinit = _library.gnutls_pubkey_deinit
818
pubkey_deinit.argtypes = [pubkey_t]
819
pubkey_deinit.restype = None
821
# All the function declarations below are from
824
openpgp_crt_init = _library.gnutls_openpgp_crt_init
825
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
826
openpgp_crt_init.restype = _error_code
828
openpgp_crt_import = _library.gnutls_openpgp_crt_import
829
openpgp_crt_import.argtypes = [openpgp_crt_t,
830
ctypes.POINTER(datum_t),
832
openpgp_crt_import.restype = _error_code
834
openpgp_crt_verify_self = \
835
_library.gnutls_openpgp_crt_verify_self
836
openpgp_crt_verify_self.argtypes = [
839
ctypes.POINTER(ctypes.c_uint),
841
openpgp_crt_verify_self.restype = _error_code
843
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
844
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
845
openpgp_crt_deinit.restype = None
847
openpgp_crt_get_fingerprint = (
848
_library.gnutls_openpgp_crt_get_fingerprint)
849
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
853
openpgp_crt_get_fingerprint.restype = _error_code
855
if check_version(b"3.6.4"):
856
certificate_type_get2 = _library.gnutls_certificate_type_get2
857
certificate_type_get2.argtypes = [ClientSession, ctypes.c_int]
858
certificate_type_get2.restype = _error_code
860
# Remove non-public functions
861
del _error_code, _retry_on_error
864
def call_pipe(connection, # : multiprocessing.Connection
865
func, *args, **kwargs):
866
"""This function is meant to be called by multiprocessing.Process
868
This function runs func(*args, **kwargs), and writes the resulting
869
return value on the provided multiprocessing.Connection.
871
connection.send(func(*args, **kwargs))
268
def _timedelta_to_milliseconds(td):
269
"Convert a datetime.timedelta() to milliseconds"
270
return ((td.days * 24 * 60 * 60 * 1000)
271
+ (td.seconds * 1000)
272
+ (td.microseconds // 1000))
274
class Client(object):
876
275
"""A representation of a client host served by this server.
879
approved: bool(); 'None' if not yet approved/disapproved
278
_approved: bool(); 'None' if not yet approved/disapproved
880
279
approval_delay: datetime.timedelta(); Time to wait for approval
881
280
approval_duration: datetime.timedelta(); Duration of one approval
882
checker: multiprocessing.Process(); a running checker process used
883
to see if the client lives. 'None' if no process is
885
checker_callback_tag: a GLib event source tag, or None
281
checker: subprocess.Popen(); a running checker process used
282
to see if the client lives.
283
'None' if no process is running.
284
checker_callback_tag: a gobject event source tag, or None
886
285
checker_command: string; External command which is run to check
887
286
if client lives. %() expansions are done at
888
287
runtime with vars(self) as dict, so that for
889
288
instance %(name)s can be used in the command.
890
checker_initiator_tag: a GLib event source tag, or None
289
checker_initiator_tag: a gobject event source tag, or None
891
290
created: datetime.datetime(); (UTC) object creation
892
client_structure: Object describing what attributes a client has
893
and is used for storing the client at exit
894
291
current_checker_command: string; current running checker_command
895
disable_initiator_tag: a GLib event source tag, or None
292
disable_hook: If set, called by disable() as disable_hook(self)
293
disable_initiator_tag: a gobject event source tag, or None
897
295
fingerprint: string (40 or 32 hexadecimal digits); used to
898
uniquely identify an OpenPGP client
899
key_id: string (64 hexadecimal digits); used to uniquely identify
900
a client using raw public keys
296
uniquely identify the client
901
297
host: string; available for use by the checker command
902
298
interval: datetime.timedelta(); How often to start a new checker
903
299
last_approval_request: datetime.datetime(); (UTC) or None
904
300
last_checked_ok: datetime.datetime(); (UTC) or None
905
last_checker_status: integer between 0 and 255 reflecting exit
906
status of last checker. -1 reflects crashed
907
checker, -2 means no checker completed yet.
908
last_checker_signal: The signal which killed the last checker, if
909
last_checker_status is -1
910
last_enabled: datetime.datetime(); (UTC) or None
301
last_enabled: datetime.datetime(); (UTC)
911
302
name: string; from the config file, used in log messages and
912
303
D-Bus identifiers
913
304
secret: bytestring; sent verbatim (over TLS) to client
914
305
timeout: datetime.timedelta(); How long from last_checked_ok
915
306
until this client is disabled
916
extended_timeout: extra long timeout when secret has been sent
307
extended_timeout: extra long timeout when password has been sent
917
308
runtime_expansions: Allowed attributes for runtime expansion.
918
309
expires: datetime.datetime(); time (UTC) when a client will be
919
310
disabled, or None
920
server_settings: The server_settings dict from main()
923
313
runtime_expansions = ("approval_delay", "approval_duration",
924
"created", "enabled", "expires", "key_id",
925
"fingerprint", "host", "interval",
926
"last_approval_request", "last_checked_ok",
314
"created", "enabled", "fingerprint",
315
"host", "interval", "last_checked_ok",
927
316
"last_enabled", "name", "timeout")
930
"extended_timeout": "PT15M",
932
"checker": "fping -q -- %%(host)s",
934
"approval_delay": "PT0S",
935
"approval_duration": "PT1S",
936
"approved_by_default": "True",
941
def config_parser(config):
942
"""Construct a new dict of client settings of this form:
943
{ client_name: {setting_name: value, ...}, ...}
944
with exceptions for any special settings as defined above.
945
NOTE: Must be a pure function. Must return the same result
946
value given the same arguments.
949
for client_name in config.sections():
950
section = dict(config.items(client_name))
951
client = settings[client_name] = {}
953
client["host"] = section["host"]
954
# Reformat values from string types to Python types
955
client["approved_by_default"] = config.getboolean(
956
client_name, "approved_by_default")
957
client["enabled"] = config.getboolean(client_name,
960
# Uppercase and remove spaces from key_id and fingerprint
961
# for later comparison purposes with return value from the
962
# key_id() and fingerprint() functions
963
client["key_id"] = (section.get("key_id", "").upper()
965
client["fingerprint"] = (section["fingerprint"].upper()
967
if "secret" in section:
968
client["secret"] = codecs.decode(section["secret"]
971
elif "secfile" in section:
972
with open(os.path.expanduser(os.path.expandvars
973
(section["secfile"])),
975
client["secret"] = secfile.read()
977
raise TypeError("No secret or secfile for section {}"
979
client["timeout"] = string_to_delta(section["timeout"])
980
client["extended_timeout"] = string_to_delta(
981
section["extended_timeout"])
982
client["interval"] = string_to_delta(section["interval"])
983
client["approval_delay"] = string_to_delta(
984
section["approval_delay"])
985
client["approval_duration"] = string_to_delta(
986
section["approval_duration"])
987
client["checker_command"] = section["checker"]
988
client["last_approval_request"] = None
989
client["last_checked_ok"] = None
990
client["last_checker_status"] = -2
994
def __init__(self, settings, name=None, server_settings=None):
318
def timeout_milliseconds(self):
319
"Return the 'timeout' attribute in milliseconds"
320
return _timedelta_to_milliseconds(self.timeout)
322
def extended_timeout_milliseconds(self):
323
"Return the 'extended_timeout' attribute in milliseconds"
324
return _timedelta_to_milliseconds(self.extended_timeout)
326
def interval_milliseconds(self):
327
"Return the 'interval' attribute in milliseconds"
328
return _timedelta_to_milliseconds(self.interval)
330
def approval_delay_milliseconds(self):
331
return _timedelta_to_milliseconds(self.approval_delay)
333
def __init__(self, name = None, disable_hook=None, config=None):
334
"""Note: the 'checker' key in 'config' sets the
335
'checker_command' attribute and *not* the 'checker'
996
if server_settings is None:
998
self.server_settings = server_settings
999
# adding all client settings
1000
for setting, value in settings.items():
1001
setattr(self, setting, value)
1004
if not hasattr(self, "last_enabled"):
1005
self.last_enabled = datetime.datetime.utcnow()
1006
if not hasattr(self, "expires"):
1007
self.expires = (datetime.datetime.utcnow()
1010
self.last_enabled = None
1013
340
logger.debug("Creating client %r", self.name)
1014
logger.debug(" Key ID: %s", self.key_id)
341
# Uppercase and remove spaces from fingerprint for later
342
# comparison purposes with return value from the fingerprint()
344
self.fingerprint = (config["fingerprint"].upper()
1015
346
logger.debug(" Fingerprint: %s", self.fingerprint)
1016
self.created = settings.get("created",
1017
datetime.datetime.utcnow())
1019
# attributes specific for this server instance
347
if "secret" in config:
348
self.secret = config["secret"].decode("base64")
349
elif "secfile" in config:
350
with open(os.path.expanduser(os.path.expandvars
351
(config["secfile"])),
353
self.secret = secfile.read()
355
raise TypeError("No secret or secfile for client %s"
357
self.host = config.get("host", "")
358
self.created = datetime.datetime.utcnow()
360
self.last_approval_request = None
361
self.last_enabled = None
362
self.last_checked_ok = None
363
self.timeout = string_to_delta(config["timeout"])
364
self.extended_timeout = string_to_delta(config["extended_timeout"])
365
self.interval = string_to_delta(config["interval"])
366
self.disable_hook = disable_hook
1020
367
self.checker = None
1021
368
self.checker_initiator_tag = None
1022
369
self.disable_initiator_tag = None
1023
371
self.checker_callback_tag = None
372
self.checker_command = config["checker"]
1024
373
self.current_checker_command = None
1025
self.approved = None
374
self.last_connect = None
375
self._approved = None
376
self.approved_by_default = config.get("approved_by_default",
1026
378
self.approvals_pending = 0
1027
self.changedstate = multiprocessing_manager.Condition(
1028
multiprocessing_manager.Lock())
1029
self.client_structure = [attr
1030
for attr in self.__dict__.keys()
1031
if not attr.startswith("_")]
1032
self.client_structure.append("client_structure")
1034
for name, t in inspect.getmembers(
1035
type(self), lambda obj: isinstance(obj, property)):
1036
if not name.startswith("_"):
1037
self.client_structure.append(name)
1039
# Send notice to process children that client state has changed
379
self.approval_delay = string_to_delta(
380
config["approval_delay"])
381
self.approval_duration = string_to_delta(
382
config["approval_duration"])
383
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
1040
385
def send_changedstate(self):
1041
with self.changedstate:
1042
self.changedstate.notify_all()
386
self.changedstate.acquire()
387
self.changedstate.notify_all()
388
self.changedstate.release()
1044
390
def enable(self):
1045
391
"""Start this client's checker and timeout hooks"""
1046
392
if getattr(self, "enabled", False):
1047
393
# Already enabled
395
self.send_changedstate()
396
# Schedule a new checker to be started an 'interval' from now,
397
# and every interval from then on.
398
self.checker_initiator_tag = (gobject.timeout_add
399
(self.interval_milliseconds(),
401
# Schedule a disable() when 'timeout' has passed
1049
402
self.expires = datetime.datetime.utcnow() + self.timeout
403
self.disable_initiator_tag = (gobject.timeout_add
404
(self.timeout_milliseconds(),
1050
406
self.enabled = True
1051
407
self.last_enabled = datetime.datetime.utcnow()
1053
self.send_changedstate()
408
# Also start a new checker *right now*.
1055
411
def disable(self, quiet=True):
1056
412
"""Disable this client."""
1057
413
if not getattr(self, "enabled", False):
416
self.send_changedstate()
1060
418
logger.info("Disabling client %s", self.name)
1061
if getattr(self, "disable_initiator_tag", None) is not None:
1062
GLib.source_remove(self.disable_initiator_tag)
419
if getattr(self, "disable_initiator_tag", False):
420
gobject.source_remove(self.disable_initiator_tag)
1063
421
self.disable_initiator_tag = None
1064
422
self.expires = None
1065
if getattr(self, "checker_initiator_tag", None) is not None:
1066
GLib.source_remove(self.checker_initiator_tag)
423
if getattr(self, "checker_initiator_tag", False):
424
gobject.source_remove(self.checker_initiator_tag)
1067
425
self.checker_initiator_tag = None
1068
426
self.stop_checker()
427
if self.disable_hook:
428
self.disable_hook(self)
1069
429
self.enabled = False
1071
self.send_changedstate()
1072
# Do not run this again if called by a GLib.timeout_add
430
# Do not run this again if called by a gobject.timeout_add
1075
433
def __del__(self):
434
self.disable_hook = None
1078
def init_checker(self):
1079
# Schedule a new checker to be started an 'interval' from now,
1080
# and every interval from then on.
1081
if self.checker_initiator_tag is not None:
1082
GLib.source_remove(self.checker_initiator_tag)
1083
self.checker_initiator_tag = GLib.timeout_add(
1084
random.randrange(int(self.interval.total_seconds() * 1000
1087
# Schedule a disable() when 'timeout' has passed
1088
if self.disable_initiator_tag is not None:
1089
GLib.source_remove(self.disable_initiator_tag)
1090
self.disable_initiator_tag = GLib.timeout_add(
1091
int(self.timeout.total_seconds() * 1000), self.disable)
1092
# Also start a new checker *right now*.
1093
self.start_checker()
1095
def checker_callback(self, source, condition, connection,
437
def checker_callback(self, pid, condition, command):
1097
438
"""The checker has completed, so take appropriate actions."""
1098
# Read return code from connection (see call_pipe)
1099
returncode = connection.recv()
1101
if self.checker is not None:
1103
439
self.checker_callback_tag = None
1104
440
self.checker = None
1107
self.last_checker_status = returncode
1108
self.last_checker_signal = None
1109
if self.last_checker_status == 0:
441
if os.WIFEXITED(condition):
442
exitstatus = os.WEXITSTATUS(condition)
1110
444
logger.info("Checker for %(name)s succeeded",
1112
446
self.checked_ok()
1114
logger.info("Checker for %(name)s failed", vars(self))
448
logger.info("Checker for %(name)s failed",
1116
self.last_checker_status = -1
1117
self.last_checker_signal = -returncode
1118
451
logger.warning("Checker for %(name)s crashed?",
1122
def checked_ok(self):
1123
"""Assert that the client has been seen, alive and well."""
1124
self.last_checked_ok = datetime.datetime.utcnow()
1125
self.last_checker_status = 0
1126
self.last_checker_signal = None
1129
def bump_timeout(self, timeout=None):
1130
"""Bump up the timeout for this client."""
454
def checked_ok(self, timeout=None):
455
"""Bump up the timeout for this client.
457
This should only be called when the client has been seen,
1131
460
if timeout is None:
1132
461
timeout = self.timeout
1133
if self.disable_initiator_tag is not None:
1134
GLib.source_remove(self.disable_initiator_tag)
1135
self.disable_initiator_tag = None
1136
if getattr(self, "enabled", False):
1137
self.disable_initiator_tag = GLib.timeout_add(
1138
int(timeout.total_seconds() * 1000), self.disable)
1139
self.expires = datetime.datetime.utcnow() + timeout
462
self.last_checked_ok = datetime.datetime.utcnow()
463
gobject.source_remove(self.disable_initiator_tag)
464
self.expires = datetime.datetime.utcnow() + timeout
465
self.disable_initiator_tag = (gobject.timeout_add
466
(_timedelta_to_milliseconds(timeout),
1141
469
def need_approval(self):
1142
470
self.last_approval_request = datetime.datetime.utcnow()
1144
472
def start_checker(self):
1145
473
"""Start a new checker subprocess if one is not running.
1147
475
If a checker already exists, leave it running and do
1149
477
# The reason for not killing a running checker is that if we
1150
# did that, and if a checker (for some reason) started running
1151
# slowly and taking more than 'interval' time, then the client
1152
# would inevitably timeout, since no checker would get a
1153
# chance to run to completion. If we instead leave running
478
# did that, then if a checker (for some reason) started
479
# running slowly and taking more than 'interval' time, the
480
# client would inevitably timeout, since no checker would get
481
# a chance to run to completion. If we instead leave running
1154
482
# checkers alone, the checker would have to take more time
1155
483
# than 'timeout' for the client to be disabled, which is as it
1158
if self.checker is not None and not self.checker.is_alive():
1159
logger.warning("Checker was not alive; joining")
486
# If a checker exists, make sure it is not a zombie
488
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
489
except (AttributeError, OSError) as error:
490
if (isinstance(error, OSError)
491
and error.errno != errno.ECHILD):
495
logger.warning("Checker was a zombie")
496
gobject.source_remove(self.checker_callback_tag)
497
self.checker_callback(pid, status,
498
self.current_checker_command)
1162
499
# Start a new checker if needed
1163
500
if self.checker is None:
1164
# Escape attributes for the shell
1166
attr: shlex.quote(str(getattr(self, attr)))
1167
for attr in self.runtime_expansions}
1169
command = self.checker_command % escaped_attrs
1170
except TypeError as error:
1171
logger.error('Could not format string "%s"',
1172
self.checker_command,
1174
return True # Try again later
502
# In case checker_command has exactly one % operator
503
command = self.checker_command % self.host
505
# Escape attributes for the shell
506
escaped_attrs = dict(
508
re.escape(unicode(str(getattr(self, attr, "")),
512
self.runtime_expansions)
515
command = self.checker_command % escaped_attrs
516
except TypeError as error:
517
logger.error('Could not format string "%s":'
518
' %s', self.checker_command, error)
519
return True # Try again later
1175
520
self.current_checker_command = command
1176
logger.info("Starting checker %r for %s", command,
1178
# We don't need to redirect stdout and stderr, since
1179
# in normal mode, that is already done by daemon(),
1180
# and in debug mode we don't want to. (Stdin is
1181
# always replaced by /dev/null.)
1182
# The exception is when not debugging but nevertheless
1183
# running in the foreground; use the previously
1185
popen_args = {"close_fds": True,
1188
if (not self.server_settings["debug"]
1189
and self.server_settings["foreground"]):
1190
popen_args.update({"stdout": wnull,
1192
pipe = multiprocessing.Pipe(duplex=False)
1193
self.checker = multiprocessing.Process(
1195
args=(pipe[1], subprocess.call, command),
1197
self.checker.start()
1198
self.checker_callback_tag = GLib.io_add_watch(
1199
GLib.IOChannel.unix_new(pipe[0].fileno()),
1200
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
1201
self.checker_callback, pipe[0], command)
1202
# Re-run this periodically if run by GLib.timeout_add
522
logger.info("Starting checker %r for %s",
524
# We don't need to redirect stdout and stderr, since
525
# in normal mode, that is already done by daemon(),
526
# and in debug mode we don't want to. (Stdin is
527
# always replaced by /dev/null.)
528
self.checker = subprocess.Popen(command,
531
self.checker_callback_tag = (gobject.child_watch_add
533
self.checker_callback,
535
# The checker may have completed before the gobject
536
# watch was added. Check for this.
537
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
539
gobject.source_remove(self.checker_callback_tag)
540
self.checker_callback(pid, status, command)
541
except OSError as error:
542
logger.error("Failed to start subprocess: %s",
544
# Re-run this periodically if run by gobject.timeout_add
1205
547
def stop_checker(self):
1206
548
"""Force the checker process, if any, to stop."""
1207
549
if self.checker_callback_tag:
1208
GLib.source_remove(self.checker_callback_tag)
550
gobject.source_remove(self.checker_callback_tag)
1209
551
self.checker_callback_tag = None
1210
552
if getattr(self, "checker", None) is None:
1212
554
logger.debug("Stopping checker for %(name)s", vars(self))
1213
self.checker.terminate()
556
os.kill(self.checker.pid, signal.SIGTERM)
558
#if self.checker.poll() is None:
559
# os.kill(self.checker.pid, signal.SIGKILL)
560
except OSError as error:
561
if error.errno != errno.ESRCH: # No such process
1214
563
self.checker = None
1217
def dbus_service_property(dbus_interface,
566
def dbus_service_property(dbus_interface, signature="v",
567
access="readwrite", byte_arrays=False):
1221
568
"""Decorators for marking methods of a DBusObjectWithProperties to
1222
569
become properties on the D-Bus.
1224
571
The decorated method will be called with no arguments by "Get"
1225
572
and with one argument by "Set".
1227
574
The parameters, where they are supported, are the same as
1228
575
dbus.service.method, except there is only "signature", since the
1229
576
type from Get() and the type sent to Set() is the same.
1561
743
except (AttributeError, xml.dom.DOMException,
1562
744
xml.parsers.expat.ExpatError) as error:
1563
745
logger.error("Failed to override Introspection method",
1569
dbus.OBJECT_MANAGER_IFACE
1570
except AttributeError:
1571
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1574
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1575
"""A D-Bus object with an ObjectManager.
1577
Classes inheriting from this exposes the standard
1578
GetManagedObjects call and the InterfacesAdded and
1579
InterfacesRemoved signals on the standard
1580
"org.freedesktop.DBus.ObjectManager" interface.
1582
Note: No signals are sent automatically; they must be sent
1585
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1586
out_signature="a{oa{sa{sv}}}")
1587
def GetManagedObjects(self):
1588
"""This function must be overridden"""
1589
raise NotImplementedError()
1591
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1592
signature="oa{sa{sv}}")
1593
def InterfacesAdded(self, object_path, interfaces_and_properties):
1596
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1597
def InterfacesRemoved(self, object_path, interfaces):
1600
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1602
path_keyword='object_path',
1603
connection_keyword='connection')
1604
def Introspect(self, object_path, connection):
1605
"""Overloading of standard D-Bus method.
1607
Override return argument name of GetManagedObjects to be
1608
"objpath_interfaces_and_properties"
1610
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1614
document = xml.dom.minidom.parseString(xmlstring)
1616
for if_tag in document.getElementsByTagName("interface"):
1617
# Fix argument name for the GetManagedObjects method
1618
if (if_tag.getAttribute("name")
1619
== dbus.OBJECT_MANAGER_IFACE):
1620
for cn in if_tag.getElementsByTagName("method"):
1621
if (cn.getAttribute("name")
1622
== "GetManagedObjects"):
1623
for arg in cn.getElementsByTagName("arg"):
1624
if (arg.getAttribute("direction")
1628
"objpath_interfaces"
1630
xmlstring = document.toxml("utf-8")
1632
except (AttributeError, xml.dom.DOMException,
1633
xml.parsers.expat.ExpatError) as error:
1634
logger.error("Failed to override Introspection method",
1639
def datetime_to_dbus(dt, variant_level=0):
750
def datetime_to_dbus (dt, variant_level=0):
1640
751
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1642
return dbus.String("", variant_level=variant_level)
1643
return dbus.String(dt.isoformat(), variant_level=variant_level)
1646
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1647
"""A class decorator; applied to a subclass of
1648
dbus.service.Object, it will add alternate D-Bus attributes with
1649
interface names according to the "alt_interface_names" mapping.
1652
@alternate_dbus_interfaces({"org.example.Interface":
1653
"net.example.AlternateInterface"})
1654
class SampleDBusObject(dbus.service.Object):
1655
@dbus.service.method("org.example.Interface")
1656
def SampleDBusMethod():
1659
The above "SampleDBusMethod" on "SampleDBusObject" will be
1660
reachable via two interfaces: "org.example.Interface" and
1661
"net.example.AlternateInterface", the latter of which will have
1662
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1663
"true", unless "deprecate" is passed with a False value.
1665
This works for methods and signals, and also for D-Bus properties
1666
(from DBusObjectWithProperties) and interfaces (from the
1667
dbus_interface_annotations decorator).
753
return dbus.String("", variant_level = variant_level)
754
return dbus.String(dt.isoformat(),
755
variant_level=variant_level)
757
class AlternateDBusNamesMetaclass(DBusObjectWithProperties.__metaclass__):
758
"""Applied to an empty subclass of a D-Bus object, this metaclass
759
will add additional D-Bus attributes matching a certain pattern.
1671
for orig_interface_name, alt_interface_name in (
1672
alt_interface_names.items()):
1674
interface_names = set()
1675
# Go though all attributes of the class
1676
for attrname, attribute in inspect.getmembers(cls):
761
def __new__(mcs, name, bases, attr):
762
# Go through all the base classes which could have D-Bus
763
# methods, signals, or properties in them
764
for base in (b for b in bases
765
if issubclass(b, dbus.service.Object)):
766
# Go though all attributes of the base class
767
for attrname, attribute in inspect.getmembers(base):
1677
768
# Ignore non-D-Bus attributes, and D-Bus attributes
1678
769
# with the wrong interface name
1679
770
if (not hasattr(attribute, "_dbus_interface")
1680
or not attribute._dbus_interface.startswith(
1681
orig_interface_name)):
771
or not attribute._dbus_interface
772
.startswith("se.recompile.Mandos")):
1683
774
# Create an alternate D-Bus interface name based on
1684
775
# the current name
1685
alt_interface = attribute._dbus_interface.replace(
1686
orig_interface_name, alt_interface_name)
1687
interface_names.add(alt_interface)
776
alt_interface = (attribute._dbus_interface
777
.replace("se.recompile.Mandos",
778
"se.bsnet.fukt.Mandos"))
1688
779
# Is this a D-Bus signal?
1689
780
if getattr(attribute, "_dbus_is_signal", False):
1690
# Extract the original non-method undecorated
1691
# function by black magic
1692
if sys.version_info.major == 2:
1693
nonmethod_func = (dict(
781
# Extract the original non-method function by
783
nonmethod_func = (dict(
1694
784
zip(attribute.func_code.co_freevars,
1695
attribute.__closure__))
1696
["func"].cell_contents)
1698
nonmethod_func = (dict(
1699
zip(attribute.__code__.co_freevars,
1700
attribute.__closure__))
1701
["func"].cell_contents)
785
attribute.__closure__))["func"]
1702
787
# Create a new, but exactly alike, function
1703
788
# object, and decorate it to be a new D-Bus signal
1704
789
# with the alternate D-Bus interface name
1705
new_function = copy_function(nonmethod_func)
1706
new_function = (dbus.service.signal(
1708
attribute._dbus_signature)(new_function))
1709
# Copy annotations, if any
1711
new_function._dbus_annotations = dict(
1712
attribute._dbus_annotations)
1713
except AttributeError:
790
new_function = (dbus.service.signal
792
attribute._dbus_signature)
794
nonmethod_func.func_code,
795
nonmethod_func.func_globals,
796
nonmethod_func.func_name,
797
nonmethod_func.func_defaults,
798
nonmethod_func.func_closure)))
1716
799
# Define a creator of a function to call both the
1717
# original and alternate functions, so both the
1718
# original and alternate signals gets sent when
1719
# the function is called
800
# old and new functions, so both the old and new
801
# signals gets sent when the function is called
1720
802
def fixscope(func1, func2):
1721
803
"""This function is a scope container to pass
1722
804
func1 and func2 to the "call_both" function
1723
805
outside of its arguments"""
1725
@functools.wraps(func2)
1726
806
def call_both(*args, **kwargs):
1727
807
"""This function will emit two D-Bus
1728
808
signals by calling func1 and func2"""
1729
809
func1(*args, **kwargs)
1730
810
func2(*args, **kwargs)
1731
# Make wrapper function look like a D-Bus
1733
for name, attr in inspect.getmembers(func2):
1734
if name.startswith("_dbus_"):
1735
setattr(call_both, name, attr)
1737
811
return call_both
1738
812
# Create the "call_both" function and add it to
1740
attr[attrname] = fixscope(attribute, new_function)
814
attr[attrname] = fixscope(attribute,
1741
816
# Is this a D-Bus method?
1742
817
elif getattr(attribute, "_dbus_is_method", False):
1743
818
# Create a new, but exactly alike, function
1744
819
# object. Decorate it to be a new D-Bus method
1745
820
# with the alternate D-Bus interface name. Add it
1748
dbus.service.method(
1750
attribute._dbus_in_signature,
1751
attribute._dbus_out_signature)
1752
(copy_function(attribute)))
1753
# Copy annotations, if any
1755
attr[attrname]._dbus_annotations = dict(
1756
attribute._dbus_annotations)
1757
except AttributeError:
822
attr[attrname] = (dbus.service.method
824
attribute._dbus_in_signature,
825
attribute._dbus_out_signature)
827
(attribute.func_code,
828
attribute.func_globals,
830
attribute.func_defaults,
831
attribute.func_closure)))
1759
832
# Is this a D-Bus property?
1760
833
elif getattr(attribute, "_dbus_is_property", False):
1761
834
# Create a new, but exactly alike, function
1762
835
# object, and decorate it to be a new D-Bus
1763
836
# property with the alternate D-Bus interface
1764
837
# name. Add it to the class.
1765
attr[attrname] = (dbus_service_property(
1766
alt_interface, attribute._dbus_signature,
1767
attribute._dbus_access,
1768
attribute._dbus_get_args_options
1770
(copy_function(attribute)))
1771
# Copy annotations, if any
1773
attr[attrname]._dbus_annotations = dict(
1774
attribute._dbus_annotations)
1775
except AttributeError:
1777
# Is this a D-Bus interface?
1778
elif getattr(attribute, "_dbus_is_interface", False):
1779
# Create a new, but exactly alike, function
1780
# object. Decorate it to be a new D-Bus interface
1781
# with the alternate D-Bus interface name. Add it
1784
dbus_interface_annotations(alt_interface)
1785
(copy_function(attribute)))
1787
# Deprecate all alternate interfaces
1788
iname = "_AlternateDBusNames_interface_annotation{}"
1789
for interface_name in interface_names:
1791
@dbus_interface_annotations(interface_name)
1793
return {"org.freedesktop.DBus.Deprecated":
1795
# Find an unused name
1796
for aname in (iname.format(i)
1797
for i in itertools.count()):
1798
if aname not in attr:
1802
# Replace the class with a new subclass of it with
1803
# methods, signals, etc. as created above.
1804
if sys.version_info.major == 2:
1805
cls = type(b"{}Alternate".format(cls.__name__),
1808
cls = type("{}Alternate".format(cls.__name__),
1815
@alternate_dbus_interfaces({"se.recompile.Mandos":
1816
"se.bsnet.fukt.Mandos"})
838
attr[attrname] = (dbus_service_property
840
attribute._dbus_signature,
841
attribute._dbus_access,
843
._dbus_get_args_options
846
(attribute.func_code,
847
attribute.func_globals,
849
attribute.func_defaults,
850
attribute.func_closure)))
851
return type.__new__(mcs, name, bases, attr)
1817
853
class ClientDBus(Client, DBusObjectWithProperties):
1818
854
"""A Client class using D-Bus
1821
857
dbus_object_path: dbus.ObjectPath
1822
858
bus: dbus.SystemBus()
1825
861
runtime_expansions = (Client.runtime_expansions
1826
+ ("dbus_object_path", ))
1828
_interface = "se.recompile.Mandos.Client"
862
+ ("dbus_object_path",))
1830
864
# dbus.service.Object doesn't use super(), so we can't either.
1832
def __init__(self, bus=None, *args, **kwargs):
866
def __init__(self, bus = None, *args, **kwargs):
867
self._approvals_pending = 0
1834
869
Client.__init__(self, *args, **kwargs)
1835
870
# Only now, when this client is initialized, can it show up on
1837
client_object_name = str(self.name).translate(
872
client_object_name = unicode(self.name).translate(
1838
873
{ord("."): ord("_"),
1839
874
ord("-"): ord("_")})
1840
self.dbus_object_path = dbus.ObjectPath(
1841
"/clients/" + client_object_name)
875
self.dbus_object_path = (dbus.ObjectPath
876
("/clients/" + client_object_name))
1842
877
DBusObjectWithProperties.__init__(self, self.bus,
1843
878
self.dbus_object_path)
1845
def notifychangeproperty(transform_func, dbus_name,
1846
type_func=lambda x: x,
1848
invalidate_only=False,
1849
_interface=_interface):
880
def notifychangeproperty(transform_func,
881
dbus_name, type_func=lambda x: x,
1850
883
""" Modify a variable so that it's a property which announces
1851
884
its changes to DBus.
1853
transform_fun: Function that takes a value and a variant_level
1854
and transforms it to a D-Bus type.
886
transform_fun: Function that takes a value and transforms it
1855
888
dbus_name: D-Bus name of the variable
1856
889
type_func: Function that transform the value before sending it
1857
890
to the D-Bus. Default: no transform
1858
891
variant_level: D-Bus variant level. Default: 1
1860
attrname = "_{}".format(dbus_name)
1862
894
def setter(self, value):
895
old_value = real_value[0]
896
real_value[0] = value
1863
897
if hasattr(self, "dbus_object_path"):
1864
if (not hasattr(self, attrname) or
1865
type_func(getattr(self, attrname, None))
1866
!= type_func(value)):
1868
self.PropertiesChanged(
1869
_interface, dbus.Dictionary(),
1870
dbus.Array((dbus_name, )))
1872
dbus_value = transform_func(
1874
variant_level=variant_level)
1875
self.PropertyChanged(dbus.String(dbus_name),
1877
self.PropertiesChanged(
1879
dbus.Dictionary({dbus.String(dbus_name):
1882
setattr(self, attrname, value)
1884
return property(lambda self: getattr(self, attrname), setter)
898
if type_func(old_value) != type_func(real_value[0]):
899
dbus_value = transform_func(type_func(real_value[0]),
901
self.PropertyChanged(dbus.String(dbus_name),
904
return property(lambda self: real_value[0], setter)
1886
907
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1887
908
approvals_pending = notifychangeproperty(dbus.Boolean,
1888
909
"ApprovalPending",
1890
911
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1891
912
last_enabled = notifychangeproperty(datetime_to_dbus,
1893
checker = notifychangeproperty(
1894
dbus.Boolean, "CheckerRunning",
1895
type_func=lambda checker: checker is not None)
914
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
915
type_func = lambda checker: checker is not None)
1896
916
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1897
917
"LastCheckedOK")
1898
last_checker_status = notifychangeproperty(dbus.Int16,
1899
"LastCheckerStatus")
1900
last_approval_request = notifychangeproperty(
1901
datetime_to_dbus, "LastApprovalRequest")
918
last_approval_request = notifychangeproperty(datetime_to_dbus,
919
"LastApprovalRequest")
1902
920
approved_by_default = notifychangeproperty(dbus.Boolean,
1903
921
"ApprovedByDefault")
1904
approval_delay = notifychangeproperty(
1905
dbus.UInt64, "ApprovalDelay",
1906
type_func=lambda td: td.total_seconds() * 1000)
1907
approval_duration = notifychangeproperty(
1908
dbus.UInt64, "ApprovalDuration",
1909
type_func=lambda td: td.total_seconds() * 1000)
922
approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",
923
type_func = _timedelta_to_milliseconds)
924
approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",
925
type_func = _timedelta_to_milliseconds)
1910
926
host = notifychangeproperty(dbus.String, "Host")
1911
timeout = notifychangeproperty(
1912
dbus.UInt64, "Timeout",
1913
type_func=lambda td: td.total_seconds() * 1000)
1914
extended_timeout = notifychangeproperty(
1915
dbus.UInt64, "ExtendedTimeout",
1916
type_func=lambda td: td.total_seconds() * 1000)
1917
interval = notifychangeproperty(
1918
dbus.UInt64, "Interval",
1919
type_func=lambda td: td.total_seconds() * 1000)
927
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
928
type_func = _timedelta_to_milliseconds)
929
extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",
930
type_func = _timedelta_to_milliseconds)
931
interval = notifychangeproperty(dbus.UInt16, "Interval",
932
type_func = _timedelta_to_milliseconds)
1920
933
checker_command = notifychangeproperty(dbus.String, "Checker")
1921
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1922
invalidate_only=True)
1924
935
del notifychangeproperty
1926
937
def __del__(self, *args, **kwargs):
1928
939
self.remove_from_connection()
2246
1226
self.start_checker()
2248
1228
self.stop_checker()
2250
1230
# ObjectPath - property
2252
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2253
"org.freedesktop.DBus.Deprecated": "true"})
2254
1231
@dbus_service_property(_interface, signature="o", access="read")
2255
1232
def ObjectPath_dbus_property(self):
2256
return self.dbus_object_path # is already a dbus.ObjectPath
1233
return self.dbus_object_path # is already a dbus.ObjectPath
2258
1235
# Secret = property
2260
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2262
@dbus_service_property(_interface,
1236
@dbus_service_property(_interface, signature="ay",
1237
access="write", byte_arrays=True)
2266
1238
def Secret_dbus_property(self, value):
2267
self.secret = bytes(value)
1239
self.secret = str(value)
2273
def __init__(self, child_pipe, key_id, fpr, address):
1244
class ProxyClient(object):
1245
def __init__(self, child_pipe, fpr, address):
2274
1246
self._pipe = child_pipe
2275
self._pipe.send(('init', key_id, fpr, address))
1247
self._pipe.send(('init', fpr, address))
2276
1248
if not self._pipe.recv():
2277
raise KeyError(key_id or fpr)
2279
1251
def __getattribute__(self, name):
1252
if(name == '_pipe'):
2281
1253
return super(ProxyClient, self).__getattribute__(name)
2282
1254
self._pipe.send(('getattr', name))
2283
1255
data = self._pipe.recv()
2284
1256
if data[0] == 'data':
2286
1258
if data[0] == 'function':
2288
1259
def func(*args, **kwargs):
2289
1260
self._pipe.send(('funcall', name, args, kwargs))
2290
1261
return self._pipe.recv()[1]
2294
1264
def __setattr__(self, name, value):
1265
if(name == '_pipe'):
2296
1266
return super(ProxyClient, self).__setattr__(name, value)
2297
1267
self._pipe.send(('setattr', name, value))
1269
class ClientDBusTransitional(ClientDBus):
1270
__metaclass__ = AlternateDBusNamesMetaclass
2300
1272
class ClientHandler(socketserver.BaseRequestHandler, object):
2301
1273
"""A class to handle client connections.
2303
1275
Instantiated once for each connection to handle it.
2304
1276
Note: This will run in its own forked process."""
2306
1278
def handle(self):
2307
1279
with contextlib.closing(self.server.child_pipe) as child_pipe:
2308
1280
logger.info("TCP connection from: %s",
2309
str(self.client_address))
1281
unicode(self.client_address))
2310
1282
logger.debug("Pipe FD: %d",
2311
1283
self.server.child_pipe.fileno())
2313
session = gnutls.ClientSession(self.request)
2315
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2316
# "+AES-256-CBC", "+SHA1",
2317
# "+COMP-NULL", "+CTYPE-OPENPGP",
1285
session = (gnutls.connection
1286
.ClientSession(self.request,
1288
.X509Credentials()))
1290
# Note: gnutls.connection.X509Credentials is really a
1291
# generic GnuTLS certificate credentials object so long as
1292
# no X.509 keys are added to it. Therefore, we can use it
1293
# here despite using OpenPGP certificates.
1295
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1296
# "+AES-256-CBC", "+SHA1",
1297
# "+COMP-NULL", "+CTYPE-OPENPGP",
2319
1299
# Use a fallback default, since this MUST be set.
2320
1300
priority = self.server.gnutls_priority
2321
1301
if priority is None:
2322
1302
priority = "NORMAL"
2323
gnutls.priority_set_direct(session,
2324
priority.encode("utf-8"), None)
1303
(gnutls.library.functions
1304
.gnutls_priority_set_direct(session._c_object,
2326
1307
# Start communication using the Mandos protocol
2327
1308
# Get protocol number
2328
1309
line = self.request.makefile().readline()
2329
1310
logger.debug("Protocol version: %r", line)
2331
1312
if int(line.strip().split()[0]) > 1:
2332
raise RuntimeError(line)
2333
1314
except (ValueError, IndexError, RuntimeError) as error:
2334
1315
logger.error("Unknown protocol version: %s", error)
2337
1318
# Start GnuTLS connection
2339
1320
session.handshake()
2340
except gnutls.Error as error:
1321
except gnutls.errors.GNUTLSError as error:
2341
1322
logger.warning("Handshake failed: %s", error)
2342
1323
# Do not run session.bye() here: the session is not
2343
1324
# established. Just abandon the request.
2345
1326
logger.debug("Handshake succeeded")
2347
1328
approval_required = False
2349
if gnutls.has_rawpk:
2352
key_id = self.key_id(
2353
self.peer_certificate(session))
2354
except (TypeError, gnutls.Error) as error:
2355
logger.warning("Bad certificate: %s", error)
2357
logger.debug("Key ID: %s",
2358
key_id.decode("utf-8",
2364
fpr = self.fingerprint(
2365
self.peer_certificate(session))
2366
except (TypeError, gnutls.Error) as error:
2367
logger.warning("Bad certificate: %s", error)
2369
logger.debug("Fingerprint: %s", fpr)
2372
client = ProxyClient(child_pipe, key_id, fpr,
1331
fpr = self.fingerprint(self.peer_certificate
1334
gnutls.errors.GNUTLSError) as error:
1335
logger.warning("Bad certificate: %s", error)
1337
logger.debug("Fingerprint: %s", fpr)
1340
client = ProxyClient(child_pipe, fpr,
2373
1341
self.client_address)
2374
1342
except KeyError:
2377
1345
if client.approval_delay:
2378
1346
delay = client.approval_delay
2379
1347
client.approvals_pending += 1
2380
1348
approval_required = True
2383
1351
if not client.enabled:
2384
1352
logger.info("Client %s is disabled",
2386
1354
if self.server.use_dbus:
2387
1355
# Emit D-Bus signal
2388
client.Rejected("Disabled")
1356
client.Rejected("Disabled")
2391
if client.approved or not client.approval_delay:
2392
# We are approved or approval is disabled
1359
if client._approved or not client.approval_delay:
1360
#We are approved or approval is disabled
2394
elif client.approved is None:
1362
elif client._approved is None:
2395
1363
logger.info("Client %s needs approval",
2397
1365
if self.server.use_dbus:
2398
1366
# Emit D-Bus signal
2399
1367
client.NeedApproval(
2400
client.approval_delay.total_seconds()
2401
* 1000, client.approved_by_default)
1368
client.approval_delay_milliseconds(),
1369
client.approved_by_default)
2403
1371
logger.warning("Client %s was not approved",
2428
1397
delay -= time2 - time
2431
session.send(client.secret)
2432
except gnutls.Error as error:
2433
logger.warning("gnutls send failed",
1400
while sent_size < len(client.secret):
1402
sent = session.send(client.secret[sent_size:])
1403
except gnutls.errors.GNUTLSError as error:
1404
logger.warning("gnutls send failed")
1406
logger.debug("Sent: %d, remaining: %d",
1407
sent, len(client.secret)
1408
- (sent_size + sent))
2437
1411
logger.info("Sending secret to %s", client.name)
2438
# bump the timeout using extended_timeout
2439
client.bump_timeout(client.extended_timeout)
1412
# bump the timeout as if seen
1413
client.checked_ok(client.extended_timeout)
2440
1414
if self.server.use_dbus:
2441
1415
# Emit D-Bus signal
2442
1416
client.GotSecret()
2445
1419
if approval_required:
2446
1420
client.approvals_pending -= 1
2449
except gnutls.Error as error:
2450
logger.warning("GnuTLS bye failed",
1423
except gnutls.errors.GNUTLSError as error:
1424
logger.warning("GnuTLS bye failed")
2454
1427
def peer_certificate(session):
2455
"Return the peer's certificate as a bytestring"
2457
cert_type = gnutls.certificate_type_get2(
2458
session, gnutls.CTYPE_PEERS)
2459
except AttributeError:
2460
cert_type = gnutls.certificate_type_get(session)
2461
if gnutls.has_rawpk:
2462
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2464
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2465
# If not a valid certificate type...
2466
if cert_type not in valid_cert_types:
2467
logger.info("Cert type %r not in %r", cert_type,
2469
# ...return invalid data
1428
"Return the peer's OpenPGP certificate as a bytestring"
1429
# If not an OpenPGP certificate...
1430
if (gnutls.library.functions
1431
.gnutls_certificate_type_get(session._c_object)
1432
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1433
# ...do the normal thing
1434
return session.peer_certificate
2471
1435
list_size = ctypes.c_uint(1)
2472
cert_list = (gnutls.certificate_get_peers
2473
(session, ctypes.byref(list_size)))
1436
cert_list = (gnutls.library.functions
1437
.gnutls_certificate_get_peers
1438
(session._c_object, ctypes.byref(list_size)))
2474
1439
if not bool(cert_list) and list_size.value != 0:
2475
raise gnutls.Error("error getting peer certificate")
1440
raise gnutls.errors.GNUTLSError("error getting peer"
2476
1442
if list_size.value == 0:
2478
1444
cert = cert_list[0]
2479
1445
return ctypes.string_at(cert.data, cert.size)
2482
def key_id(certificate):
2483
"Convert a certificate bytestring to a hexdigit key ID"
2484
# New GnuTLS "datum" with the public key
2485
datum = gnutls.datum_t(
2486
ctypes.cast(ctypes.c_char_p(certificate),
2487
ctypes.POINTER(ctypes.c_ubyte)),
2488
ctypes.c_uint(len(certificate)))
2489
# XXX all these need to be created in the gnutls "module"
2490
# New empty GnuTLS certificate
2491
pubkey = gnutls.pubkey_t()
2492
gnutls.pubkey_init(ctypes.byref(pubkey))
2493
# Import the raw public key into the certificate
2494
gnutls.pubkey_import(pubkey,
2495
ctypes.byref(datum),
2496
gnutls.X509_FMT_DER)
2497
# New buffer for the key ID
2498
buf = ctypes.create_string_buffer(32)
2499
buf_len = ctypes.c_size_t(len(buf))
2500
# Get the key ID from the raw public key into the buffer
2501
gnutls.pubkey_get_key_id(
2503
gnutls.KEYID_USE_SHA256,
2504
ctypes.cast(ctypes.byref(buf),
2505
ctypes.POINTER(ctypes.c_ubyte)),
2506
ctypes.byref(buf_len))
2507
# Deinit the certificate
2508
gnutls.pubkey_deinit(pubkey)
2510
# Convert the buffer to a Python bytestring
2511
key_id = ctypes.string_at(buf, buf_len.value)
2512
# Convert the bytestring to hexadecimal notation
2513
hex_key_id = binascii.hexlify(key_id).upper()
2517
1448
def fingerprint(openpgp):
2518
1449
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2519
1450
# New GnuTLS "datum" with the OpenPGP public key
2520
datum = gnutls.datum_t(
2521
ctypes.cast(ctypes.c_char_p(openpgp),
2522
ctypes.POINTER(ctypes.c_ubyte)),
2523
ctypes.c_uint(len(openpgp)))
1451
datum = (gnutls.library.types
1452
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1455
ctypes.c_uint(len(openpgp))))
2524
1456
# New empty GnuTLS certificate
2525
crt = gnutls.openpgp_crt_t()
2526
gnutls.openpgp_crt_init(ctypes.byref(crt))
1457
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1458
(gnutls.library.functions
1459
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2527
1460
# Import the OpenPGP public key into the certificate
2528
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2529
gnutls.OPENPGP_FMT_RAW)
1461
(gnutls.library.functions
1462
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1463
gnutls.library.constants
1464
.GNUTLS_OPENPGP_FMT_RAW))
2530
1465
# Verify the self signature in the key
2531
1466
crtverify = ctypes.c_uint()
2532
gnutls.openpgp_crt_verify_self(crt, 0,
2533
ctypes.byref(crtverify))
1467
(gnutls.library.functions
1468
.gnutls_openpgp_crt_verify_self(crt, 0,
1469
ctypes.byref(crtverify)))
2534
1470
if crtverify.value != 0:
2535
gnutls.openpgp_crt_deinit(crt)
2536
raise gnutls.CertificateSecurityError(code
1471
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1472
raise (gnutls.errors.CertificateSecurityError
2538
1474
# New buffer for the fingerprint
2539
1475
buf = ctypes.create_string_buffer(20)
2540
1476
buf_len = ctypes.c_size_t()
2541
1477
# Get the fingerprint from the certificate into the buffer
2542
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2543
ctypes.byref(buf_len))
1478
(gnutls.library.functions
1479
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1480
ctypes.byref(buf_len)))
2544
1481
# Deinit the certificate
2545
gnutls.openpgp_crt_deinit(crt)
1482
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2546
1483
# Convert the buffer to a Python bytestring
2547
1484
fpr = ctypes.string_at(buf, buf_len.value)
2548
1485
# Convert the bytestring to hexadecimal notation
2549
hex_fpr = binascii.hexlify(fpr).upper()
1486
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2553
class MultiprocessingMixIn:
1490
class MultiprocessingMixIn(object):
2554
1491
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2556
1492
def sub_process_main(self, request, address):
2558
1494
self.finish_request(request, address)
2560
1496
self.handle_error(request, address)
2561
1497
self.close_request(request)
2563
1499
def process_request(self, request, address):
2564
1500
"""Start a new process to process the request."""
2565
proc = multiprocessing.Process(target=self.sub_process_main,
2566
args=(request, address))
2571
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
1501
multiprocessing.Process(target = self.sub_process_main,
1502
args = (request, address)).start()
1505
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2572
1506
""" adds a pipe to the MixIn """
2574
1507
def process_request(self, request, client_address):
2575
1508
"""Overrides and wraps the original process_request().
2577
1510
This function creates a new pipe in self.pipe
2579
1512
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2581
proc = MultiprocessingMixIn.process_request(self, request,
1514
super(MultiprocessingMixInWithPipe,
1515
self).process_request(request, client_address)
2583
1516
self.child_pipe.close()
2584
self.add_pipe(parent_pipe, proc)
2586
def add_pipe(self, parent_pipe, proc):
1517
self.add_pipe(parent_pipe)
1519
def add_pipe(self, parent_pipe):
2587
1520
"""Dummy function; override as necessary"""
2588
raise NotImplementedError()
1521
raise NotImplementedError
2591
1524
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2592
socketserver.TCPServer):
1525
socketserver.TCPServer, object):
2593
1526
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2596
1529
enabled: Boolean; whether this server is activated yet
2597
1530
interface: None or a network interface name (string)
2598
1531
use_ipv6: Boolean; to use IPv6 or not
2601
1533
def __init__(self, server_address, RequestHandlerClass,
2605
"""If socketfd is set, use that file descriptor instead of
2606
creating a new one with socket.socket().
1534
interface=None, use_ipv6=True):
2608
1535
self.interface = interface
2610
1537
self.address_family = socket.AF_INET6
2611
if socketfd is not None:
2612
# Save the file descriptor
2613
self.socketfd = socketfd
2614
# Save the original socket.socket() function
2615
self.socket_socket = socket.socket
2617
# To implement --socket, we monkey patch socket.socket.
2619
# (When socketserver.TCPServer is a new-style class, we
2620
# could make self.socket into a property instead of monkey
2621
# patching socket.socket.)
2623
# Create a one-time-only replacement for socket.socket()
2624
@functools.wraps(socket.socket)
2625
def socket_wrapper(*args, **kwargs):
2626
# Restore original function so subsequent calls are
2628
socket.socket = self.socket_socket
2629
del self.socket_socket
2630
# This time only, return a new socket object from the
2631
# saved file descriptor.
2632
return socket.fromfd(self.socketfd, *args, **kwargs)
2633
# Replace socket.socket() function with wrapper
2634
socket.socket = socket_wrapper
2635
# The socketserver.TCPServer.__init__ will call
2636
# socket.socket(), which might be our replacement,
2637
# socket_wrapper(), if socketfd was set.
2638
1538
socketserver.TCPServer.__init__(self, server_address,
2639
1539
RequestHandlerClass)
2641
1540
def server_bind(self):
2642
1541
"""This overrides the normal server_bind() function
2643
1542
to bind to an interface if one was specified, and also NOT to
2644
1543
bind to an address or port if they were not specified."""
2645
global SO_BINDTODEVICE
2646
1544
if self.interface is not None:
2647
1545
if SO_BINDTODEVICE is None:
2648
# Fall back to a hard-coded value which seems to be
2650
logger.warning("SO_BINDTODEVICE not found, trying 25")
2651
SO_BINDTODEVICE = 25
2653
self.socket.setsockopt(
2654
socket.SOL_SOCKET, SO_BINDTODEVICE,
2655
(self.interface + "\0").encode("utf-8"))
2656
except socket.error as error:
2657
if error.errno == errno.EPERM:
2658
logger.error("No permission to bind to"
2659
" interface %s", self.interface)
2660
elif error.errno == errno.ENOPROTOOPT:
2661
logger.error("SO_BINDTODEVICE not available;"
2662
" cannot bind to interface %s",
2664
elif error.errno == errno.ENODEV:
2665
logger.error("Interface %s does not exist,"
2666
" cannot bind", self.interface)
1546
logger.error("SO_BINDTODEVICE does not exist;"
1547
" cannot bind to interface %s",
1551
self.socket.setsockopt(socket.SOL_SOCKET,
1555
except socket.error as error:
1556
if error[0] == errno.EPERM:
1557
logger.error("No permission to"
1558
" bind to interface %s",
1560
elif error[0] == errno.ENOPROTOOPT:
1561
logger.error("SO_BINDTODEVICE not available;"
1562
" cannot bind to interface %s",
2669
1566
# Only bind(2) the socket if we really need to.
2670
1567
if self.server_address[0] or self.server_address[1]:
2671
if self.server_address[1]:
2672
self.allow_reuse_address = True
2673
1568
if not self.server_address[0]:
2674
1569
if self.address_family == socket.AF_INET6:
2675
any_address = "::" # in6addr_any
1570
any_address = "::" # in6addr_any
2677
any_address = "0.0.0.0" # INADDR_ANY
1572
any_address = socket.INADDR_ANY
2678
1573
self.server_address = (any_address,
2679
1574
self.server_address[1])
2680
1575
elif not self.server_address[1]:
2681
self.server_address = (self.server_address[0], 0)
1576
self.server_address = (self.server_address[0],
2682
1578
# if self.interface:
2683
1579
# self.server_address = (self.server_address[0],
2691
1587
class MandosServer(IPv6_TCPServer):
2692
1588
"""Mandos server.
2695
1591
clients: set of Client objects
2696
1592
gnutls_priority GnuTLS priority string
2697
1593
use_dbus: Boolean; to emit D-Bus signals or not
2699
Assumes a GLib.MainLoop event loop.
1595
Assumes a gobject.MainLoop event loop.
2702
1597
def __init__(self, server_address, RequestHandlerClass,
2706
gnutls_priority=None,
1598
interface=None, use_ipv6=True, clients=None,
1599
gnutls_priority=None, use_dbus=True):
2709
1600
self.enabled = False
2710
1601
self.clients = clients
2711
1602
if self.clients is None:
1603
self.clients = set()
2713
1604
self.use_dbus = use_dbus
2714
1605
self.gnutls_priority = gnutls_priority
2715
1606
IPv6_TCPServer.__init__(self, server_address,
2716
1607
RequestHandlerClass,
2717
interface=interface,
1608
interface = interface,
1609
use_ipv6 = use_ipv6)
2721
1610
def server_activate(self):
2722
1611
if self.enabled:
2723
1612
return socketserver.TCPServer.server_activate(self)
2725
1613
def enable(self):
2726
1614
self.enabled = True
2728
def add_pipe(self, parent_pipe, proc):
1615
def add_pipe(self, parent_pipe):
2729
1616
# Call "handle_ipc" for both data and EOF events
2731
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2732
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2733
functools.partial(self.handle_ipc,
2734
parent_pipe=parent_pipe,
2737
def handle_ipc(self, source, condition,
1617
gobject.io_add_watch(parent_pipe.fileno(),
1618
gobject.IO_IN | gobject.IO_HUP,
1619
functools.partial(self.handle_ipc,
1620
parent_pipe = parent_pipe))
1622
def handle_ipc(self, source, condition, parent_pipe=None,
2740
1623
client_object=None):
2741
# error, or the other end of multiprocessing.Pipe has closed
2742
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2743
# Wait for other process to exit
1625
gobject.IO_IN: "IN", # There is data to read.
1626
gobject.IO_OUT: "OUT", # Data can be written (without
1628
gobject.IO_PRI: "PRI", # There is urgent data to read.
1629
gobject.IO_ERR: "ERR", # Error condition.
1630
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1631
# broken, usually for pipes and
1634
conditions_string = ' | '.join(name
1636
condition_names.iteritems()
1637
if cond & condition)
1638
# error or the other end of multiprocessing.Pipe has closed
1639
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2747
1642
# Read a request from the child
2748
1643
request = parent_pipe.recv()
2749
1644
command = request[0]
2751
1646
if command == 'init':
2752
key_id = request[1].decode("ascii")
2753
fpr = request[2].decode("ascii")
2754
address = request[3]
2756
for c in self.clients.values():
2757
if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"
2758
"27AE41E4649B934CA495991B7852B855"):
2760
if key_id and c.key_id == key_id:
2763
if fpr and c.fingerprint == fpr:
1648
address = request[2]
1650
for c in self.clients:
1651
if c.fingerprint == fpr:
2767
logger.info("Client not found for key ID: %s, address"
2768
": %s", key_id or fpr, address)
1655
logger.info("Client not found for fingerprint: %s, ad"
1656
"dress: %s", fpr, address)
2769
1657
if self.use_dbus:
2770
1658
# Emit D-Bus signal
2771
mandos_dbus_service.ClientNotFound(key_id or fpr,
1659
mandos_dbus_service.ClientNotFound(fpr, address[0])
2773
1660
parent_pipe.send(False)
2777
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2778
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2779
functools.partial(self.handle_ipc,
2780
parent_pipe=parent_pipe,
2782
client_object=client))
1663
gobject.io_add_watch(parent_pipe.fileno(),
1664
gobject.IO_IN | gobject.IO_HUP,
1665
functools.partial(self.handle_ipc,
1666
parent_pipe = parent_pipe,
1667
client_object = client))
2783
1668
parent_pipe.send(True)
2784
# remove the old hook in favor of the new above hook on
1669
# remove the old hook in favor of the new above hook on same fileno
2787
1671
if command == 'funcall':
2788
1672
funcname = request[1]
2789
1673
args = request[2]
2790
1674
kwargs = request[3]
2792
parent_pipe.send(('data', getattr(client_object,
1676
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
2796
1678
if command == 'getattr':
2797
1679
attrname = request[1]
2798
if isinstance(client_object.__getattribute__(attrname),
2799
collections.abc.Callable):
2800
parent_pipe.send(('function', ))
1680
if callable(client_object.__getattribute__(attrname)):
1681
parent_pipe.send(('function',))
2803
'data', client_object.__getattribute__(attrname)))
1683
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2805
1685
if command == 'setattr':
2806
1686
attrname = request[1]
2807
1687
value = request[2]
2808
1688
setattr(client_object, attrname, value)
2813
def rfc3339_duration_to_delta(duration):
2814
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2816
>>> timedelta = datetime.timedelta
2817
>>> rfc3339_duration_to_delta("P7D") == timedelta(7)
2819
>>> rfc3339_duration_to_delta("PT60S") == timedelta(0, 60)
2821
>>> rfc3339_duration_to_delta("PT60M") == timedelta(0, 3600)
2823
>>> rfc3339_duration_to_delta("PT24H") == timedelta(1)
2825
>>> rfc3339_duration_to_delta("P1W") == timedelta(7)
2827
>>> rfc3339_duration_to_delta("PT5M30S") == timedelta(0, 330)
2829
>>> rfc3339_duration_to_delta("P1DT3M20S") == timedelta(1, 200)
2834
# Parsing an RFC 3339 duration with regular expressions is not
2835
# possible - there would have to be multiple places for the same
2836
# values, like seconds. The current code, while more esoteric, is
2837
# cleaner without depending on a parsing library. If Python had a
2838
# built-in library for parsing we would use it, but we'd like to
2839
# avoid excessive use of external libraries.
2841
# New type for defining tokens, syntax, and semantics all-in-one
2842
Token = collections.namedtuple("Token", (
2843
"regexp", # To match token; if "value" is not None, must have
2844
# a "group" containing digits
2845
"value", # datetime.timedelta or None
2846
"followers")) # Tokens valid after this token
2847
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2848
# the "duration" ABNF definition in RFC 3339, Appendix A.
2849
token_end = Token(re.compile(r"$"), None, frozenset())
2850
token_second = Token(re.compile(r"(\d+)S"),
2851
datetime.timedelta(seconds=1),
2852
frozenset((token_end, )))
2853
token_minute = Token(re.compile(r"(\d+)M"),
2854
datetime.timedelta(minutes=1),
2855
frozenset((token_second, token_end)))
2856
token_hour = Token(re.compile(r"(\d+)H"),
2857
datetime.timedelta(hours=1),
2858
frozenset((token_minute, token_end)))
2859
token_time = Token(re.compile(r"T"),
2861
frozenset((token_hour, token_minute,
2863
token_day = Token(re.compile(r"(\d+)D"),
2864
datetime.timedelta(days=1),
2865
frozenset((token_time, token_end)))
2866
token_month = Token(re.compile(r"(\d+)M"),
2867
datetime.timedelta(weeks=4),
2868
frozenset((token_day, token_end)))
2869
token_year = Token(re.compile(r"(\d+)Y"),
2870
datetime.timedelta(weeks=52),
2871
frozenset((token_month, token_end)))
2872
token_week = Token(re.compile(r"(\d+)W"),
2873
datetime.timedelta(weeks=1),
2874
frozenset((token_end, )))
2875
token_duration = Token(re.compile(r"P"), None,
2876
frozenset((token_year, token_month,
2877
token_day, token_time,
2879
# Define starting values:
2881
value = datetime.timedelta()
2883
# Following valid tokens
2884
followers = frozenset((token_duration, ))
2885
# String left to parse
2887
# Loop until end token is found
2888
while found_token is not token_end:
2889
# Search for any currently valid tokens
2890
for token in followers:
2891
match = token.regexp.match(s)
2892
if match is not None:
2894
if token.value is not None:
2895
# Value found, parse digits
2896
factor = int(match.group(1), 10)
2897
# Add to value so far
2898
value += factor * token.value
2899
# Strip token from string
2900
s = token.regexp.sub("", s, 1)
2903
# Set valid next tokens
2904
followers = found_token.followers
2907
# No currently valid tokens were found
2908
raise ValueError("Invalid RFC 3339 duration: {!r}"
2914
1693
def string_to_delta(interval):
2915
1694
"""Parse a string and return a datetime.timedelta
2917
>>> string_to_delta('7d') == datetime.timedelta(7)
2919
>>> string_to_delta('60s') == datetime.timedelta(0, 60)
2921
>>> string_to_delta('60m') == datetime.timedelta(0, 3600)
2923
>>> string_to_delta('24h') == datetime.timedelta(1)
2925
>>> string_to_delta('1w') == datetime.timedelta(7)
2927
>>> string_to_delta('5m 30s') == datetime.timedelta(0, 330)
1696
>>> string_to_delta('7d')
1697
datetime.timedelta(7)
1698
>>> string_to_delta('60s')
1699
datetime.timedelta(0, 60)
1700
>>> string_to_delta('60m')
1701
datetime.timedelta(0, 3600)
1702
>>> string_to_delta('24h')
1703
datetime.timedelta(1)
1704
>>> string_to_delta('1w')
1705
datetime.timedelta(7)
1706
>>> string_to_delta('5m 30s')
1707
datetime.timedelta(0, 330)
2932
return rfc3339_duration_to_delta(interval)
2936
1709
timevalue = datetime.timedelta(0)
2937
1710
for s in interval.split():
1712
suffix = unicode(s[-1])
2940
1713
value = int(s[:-1])
2941
1714
if suffix == "d":
2942
1715
delta = datetime.timedelta(value)
3014
1811
parser.add_argument("--no-dbus", action="store_false",
3015
1812
dest="use_dbus", help="Do not provide D-Bus"
3016
" system bus interface", default=None)
1813
" system bus interface")
3017
1814
parser.add_argument("--no-ipv6", action="store_false",
3018
dest="use_ipv6", help="Do not use IPv6",
3020
parser.add_argument("--no-restore", action="store_false",
3021
dest="restore", help="Do not restore stored"
3022
" state", default=None)
3023
parser.add_argument("--socket", type=int,
3024
help="Specify a file descriptor to a network"
3025
" socket to use instead of creating one")
3026
parser.add_argument("--statedir", metavar="DIR",
3027
help="Directory to save/restore state in")
3028
parser.add_argument("--foreground", action="store_true",
3029
help="Run in foreground", default=None)
3030
parser.add_argument("--no-zeroconf", action="store_false",
3031
dest="zeroconf", help="Do not use Zeroconf",
1815
dest="use_ipv6", help="Do not use IPv6")
3034
1816
options = parser.parse_args()
3036
1823
# Default values for config file for server-global settings
3037
if gnutls.has_rawpk:
3038
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
3039
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
3041
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
3042
":+SIGN-DSA-SHA256")
3043
server_defaults = {"interface": "",
3047
"priority": priority,
3048
"servicename": "Mandos",
3054
"statedir": "/var/lib/mandos",
3055
"foreground": "False",
1824
server_defaults = { "interface": "",
1829
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1830
"servicename": "Mandos",
3060
1836
# Parse config file for server-global settings
3061
server_config = configparser.ConfigParser(server_defaults)
1837
server_config = configparser.SafeConfigParser(server_defaults)
3062
1838
del server_defaults
3063
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3064
# Convert the ConfigParser object to a dict
1839
server_config.read(os.path.join(options.configdir,
1841
# Convert the SafeConfigParser object to a dict
3065
1842
server_settings = server_config.defaults()
3066
1843
# Use the appropriate methods on the non-string config options
3067
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3068
"foreground", "zeroconf"):
1844
for option in ("debug", "use_dbus", "use_ipv6"):
3069
1845
server_settings[option] = server_config.getboolean("DEFAULT",
3071
1847
if server_settings["port"]:
3072
1848
server_settings["port"] = server_config.getint("DEFAULT",
3074
if server_settings["socket"]:
3075
server_settings["socket"] = server_config.getint("DEFAULT",
3077
# Later, stdin will, and stdout and stderr might, be dup'ed
3078
# over with an opened os.devnull. But we don't want this to
3079
# happen with a supplied network socket.
3080
if 0 <= server_settings["socket"] <= 2:
3081
server_settings["socket"] = os.dup(server_settings
3083
1850
del server_config
3085
1852
# Override the settings from the config file with command line
3086
1853
# options, if set.
3087
1854
for option in ("interface", "address", "port", "debug",
3088
"priority", "servicename", "configdir", "use_dbus",
3089
"use_ipv6", "debuglevel", "restore", "statedir",
3090
"socket", "foreground", "zeroconf"):
1855
"priority", "servicename", "configdir",
1856
"use_dbus", "use_ipv6", "debuglevel"):
3091
1857
value = getattr(options, option)
3092
1858
if value is not None:
3093
1859
server_settings[option] = value
3095
1861
# Force all strings to be unicode
3096
1862
for option in server_settings.keys():
3097
if isinstance(server_settings[option], bytes):
3098
server_settings[option] = (server_settings[option]
3100
# Force all boolean options to be boolean
3101
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3102
"foreground", "zeroconf"):
3103
server_settings[option] = bool(server_settings[option])
3104
# Debug implies foreground
3105
if server_settings["debug"]:
3106
server_settings["foreground"] = True
1863
if type(server_settings[option]) is str:
1864
server_settings[option] = unicode(server_settings[option])
3107
1865
# Now we have our good server settings in "server_settings"
3109
1867
##################################################################
3111
if (not server_settings["zeroconf"]
3112
and not (server_settings["port"]
3113
or server_settings["socket"] != "")):
3114
parser.error("Needs port or socket to work without Zeroconf")
3116
1869
# For convenience
3117
1870
debug = server_settings["debug"]
3118
1871
debuglevel = server_settings["debuglevel"]
3119
1872
use_dbus = server_settings["use_dbus"]
3120
1873
use_ipv6 = server_settings["use_ipv6"]
3121
stored_state_path = os.path.join(server_settings["statedir"],
3123
foreground = server_settings["foreground"]
3124
zeroconf = server_settings["zeroconf"]
3127
initlogger(debug, logging.DEBUG)
3132
level = getattr(logging, debuglevel.upper())
3133
initlogger(debug, level)
3135
1875
if server_settings["servicename"] != "Mandos":
3136
syslogger.setFormatter(
3137
logging.Formatter('Mandos ({}) [%(process)d]:'
3138
' %(levelname)s: %(message)s'.format(
3139
server_settings["servicename"])))
1876
syslogger.setFormatter(logging.Formatter
1877
('Mandos (%s) [%%(process)d]:'
1878
' %%(levelname)s: %%(message)s'
1879
% server_settings["servicename"]))
3141
1881
# Parse config file with clients
3142
client_config = configparser.ConfigParser(Client.client_defaults)
1882
client_defaults = { "timeout": "5m",
1883
"extended_timeout": "15m",
1885
"checker": "fping -q -- %%(host)s",
1887
"approval_delay": "0s",
1888
"approval_duration": "1s",
1890
client_config = configparser.SafeConfigParser(client_defaults)
3143
1891
client_config.read(os.path.join(server_settings["configdir"],
3144
1892
"clients.conf"))
3146
1894
global mandos_dbus_service
3147
1895
mandos_dbus_service = None
3150
if server_settings["socket"] != "":
3151
socketfd = server_settings["socket"]
3152
tcp_server = MandosServer(
3153
(server_settings["address"], server_settings["port"]),
3155
interface=(server_settings["interface"] or None),
3157
gnutls_priority=server_settings["priority"],
3161
pidfilename = "/run/mandos.pid"
3162
if not os.path.isdir("/run/."):
3163
pidfilename = "/var/run/mandos.pid"
3166
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3167
except IOError as e:
3168
logger.error("Could not open file %r", pidfilename,
3171
for name, group in (("_mandos", "_mandos"),
3172
("mandos", "mandos"),
3173
("nobody", "nogroup")):
3175
uid = pwd.getpwnam(name).pw_uid
3176
gid = pwd.getpwnam(group).pw_gid
1897
tcp_server = MandosServer((server_settings["address"],
1898
server_settings["port"]),
1900
interface=(server_settings["interface"]
1904
server_settings["priority"],
1907
pidfilename = "/var/run/mandos.pid"
1909
pidfile = open(pidfilename, "w")
1911
logger.error("Could not open file %r", pidfilename)
1914
uid = pwd.getpwnam("_mandos").pw_uid
1915
gid = pwd.getpwnam("_mandos").pw_gid
1918
uid = pwd.getpwnam("mandos").pw_uid
1919
gid = pwd.getpwnam("mandos").pw_gid
3178
1920
except KeyError:
1922
uid = pwd.getpwnam("nobody").pw_uid
1923
gid = pwd.getpwnam("nobody").pw_gid
3187
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3189
1930
except OSError as error:
3190
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3191
.format(uid, gid, os.strerror(error.errno)))
3192
if error.errno != errno.EPERM:
1931
if error[0] != errno.EPERM:
1934
if not debug and not debuglevel:
1935
syslogger.setLevel(logging.WARNING)
1936
console.setLevel(logging.WARNING)
1938
level = getattr(logging, debuglevel.upper())
1939
syslogger.setLevel(level)
1940
console.setLevel(level)
3196
1943
# Enable all possible GnuTLS debugging
3198
1945
# "Use a log level over 10 to enable all debugging options."
3199
1946
# - GnuTLS manual
3200
gnutls.global_set_log_level(11)
1947
gnutls.library.functions.gnutls_global_set_log_level(11)
1949
@gnutls.library.types.gnutls_log_func
3203
1950
def debug_gnutls(level, string):
3204
logger.debug("GnuTLS: %s",
3205
string[:-1].decode("utf-8",
3208
gnutls.global_set_log_function(debug_gnutls)
1951
logger.debug("GnuTLS: %s", string[:-1])
1953
(gnutls.library.functions
1954
.gnutls_global_set_log_function(debug_gnutls))
3210
1956
# Redirect stdin so all checkers get /dev/null
3211
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1957
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3212
1958
os.dup2(null, sys.stdin.fileno())
1962
# No console logging
1963
logger.removeHandler(console)
3216
1965
# Need to fork before connecting to D-Bus
3218
1967
# Close all input and output, do double fork, etc.
3221
if gi.version_info < (3, 10, 2):
3222
# multiprocessing will use threads, so before we use GLib we
3223
# need to inform GLib that threads will be used.
3226
1970
global main_loop
3227
1971
# From the Avahi example code
3228
DBusGMainLoop(set_as_default=True)
3229
main_loop = GLib.MainLoop()
1972
DBusGMainLoop(set_as_default=True )
1973
main_loop = gobject.MainLoop()
3230
1974
bus = dbus.SystemBus()
3231
1975
# End of Avahi example code
3234
1978
bus_name = dbus.service.BusName("se.recompile.Mandos",
3237
old_bus_name = dbus.service.BusName(
3238
"se.bsnet.fukt.Mandos", bus,
3240
except dbus.exceptions.DBusException as e:
3241
logger.error("Disabling D-Bus:", exc_info=e)
1979
bus, do_not_queue=True)
1980
old_bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1981
bus, do_not_queue=True)
1982
except dbus.exceptions.NameExistsException as e:
1983
logger.error(unicode(e) + ", disabling D-Bus")
3242
1984
use_dbus = False
3243
1985
server_settings["use_dbus"] = False
3244
1986
tcp_server.use_dbus = False
3246
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3247
service = AvahiServiceToSyslog(
3248
name=server_settings["servicename"],
3249
servicetype="_mandos._tcp",
3252
if server_settings["interface"]:
3253
service.interface = if_nametoindex(
3254
server_settings["interface"].encode("utf-8"))
1987
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1988
service = AvahiService(name = server_settings["servicename"],
1989
servicetype = "_mandos._tcp",
1990
protocol = protocol, bus = bus)
1991
if server_settings["interface"]:
1992
service.interface = (if_nametoindex
1993
(str(server_settings["interface"])))
3256
1995
global multiprocessing_manager
3257
1996
multiprocessing_manager = multiprocessing.Manager()
3259
1998
client_class = Client
3261
client_class = functools.partial(ClientDBus, bus=bus)
3263
client_settings = Client.config_parser(client_config)
3264
old_client_settings = {}
3267
# This is used to redirect stdout and stderr for checker processes
3269
wnull = open(os.devnull, "w") # A writable /dev/null
3270
# Only used if server is running in foreground but not in debug
3272
if debug or not foreground:
3275
# Get client data and settings from last running state.
3276
if server_settings["restore"]:
3278
with open(stored_state_path, "rb") as stored_state:
3279
if sys.version_info.major == 2:
3280
clients_data, old_client_settings = pickle.load(
3283
bytes_clients_data, bytes_old_client_settings = (
3284
pickle.load(stored_state, encoding="bytes"))
3285
# Fix bytes to strings
3288
clients_data = {(key.decode("utf-8")
3289
if isinstance(key, bytes)
3292
bytes_clients_data.items()}
3293
del bytes_clients_data
3294
for key in clients_data:
3295
value = {(k.decode("utf-8")
3296
if isinstance(k, bytes) else k): v
3298
clients_data[key].items()}
3299
clients_data[key] = value
3301
value["client_structure"] = [
3303
if isinstance(s, bytes)
3305
value["client_structure"]]
3306
# .name, .host, and .checker_command
3307
for k in ("name", "host", "checker_command"):
3308
if isinstance(value[k], bytes):
3309
value[k] = value[k].decode("utf-8")
3310
if "key_id" not in value:
3311
value["key_id"] = ""
3312
elif "fingerprint" not in value:
3313
value["fingerprint"] = ""
3314
# old_client_settings
3316
old_client_settings = {
3317
(key.decode("utf-8")
3318
if isinstance(key, bytes)
3321
bytes_old_client_settings.items()}
3322
del bytes_old_client_settings
3323
# .host and .checker_command
3324
for value in old_client_settings.values():
3325
for attribute in ("host", "checker_command"):
3326
if isinstance(value[attribute], bytes):
3327
value[attribute] = (value[attribute]
3329
os.remove(stored_state_path)
3330
except IOError as e:
3331
if e.errno == errno.ENOENT:
3332
logger.warning("Could not load persistent state:"
3333
" {}".format(os.strerror(e.errno)))
3335
logger.critical("Could not load persistent state:",
3338
except EOFError as e:
3339
logger.warning("Could not load persistent state: "
3343
with PGPEngine() as pgp:
3344
for client_name, client in clients_data.items():
3345
# Skip removed clients
3346
if client_name not in client_settings:
3349
# Decide which value to use after restoring saved state.
3350
# We have three different values: Old config file,
3351
# new config file, and saved state.
3352
# New config value takes precedence if it differs from old
3353
# config value, otherwise use saved state.
3354
for name, value in client_settings[client_name].items():
3356
# For each value in new config, check if it
3357
# differs from the old config value (Except for
3358
# the "secret" attribute)
3359
if (name != "secret"
3361
old_client_settings[client_name][name])):
3362
client[name] = value
3366
# Clients who has passed its expire date can still be
3367
# enabled if its last checker was successful. A Client
3368
# whose checker succeeded before we stored its state is
3369
# assumed to have successfully run all checkers during
3371
if client["enabled"]:
3372
if datetime.datetime.utcnow() >= client["expires"]:
3373
if not client["last_checked_ok"]:
3375
"disabling client {} - Client never "
3376
"performed a successful checker".format(
3378
client["enabled"] = False
3379
elif client["last_checker_status"] != 0:
3381
"disabling client {} - Client last"
3382
" checker failed with error code"
3385
client["last_checker_status"]))
3386
client["enabled"] = False
3388
client["expires"] = (
3389
datetime.datetime.utcnow()
3390
+ client["timeout"])
3391
logger.debug("Last checker succeeded,"
3392
" keeping {} enabled".format(
2000
client_class = functools.partial(ClientDBusTransitional, bus = bus)
2001
def client_config_items(config, section):
2002
special_settings = {
2003
"approved_by_default":
2004
lambda: config.getboolean(section,
2005
"approved_by_default"),
2007
for name, value in config.items(section):
3395
client["secret"] = pgp.decrypt(
3396
client["encrypted_secret"],
3397
client_settings[client_name]["secret"])
3399
# If decryption fails, we use secret from new settings
3400
logger.debug("Failed to decrypt {} old secret".format(
3402
client["secret"] = (client_settings[client_name]
3405
# Add/remove clients based on new changes made to config
3406
for client_name in (set(old_client_settings)
3407
- set(client_settings)):
3408
del clients_data[client_name]
3409
for client_name in (set(client_settings)
3410
- set(old_client_settings)):
3411
clients_data[client_name] = client_settings[client_name]
3413
# Create all client objects
3414
for client_name, client in clients_data.items():
3415
tcp_server.clients[client_name] = client_class(
3418
server_settings=server_settings)
2009
yield (name, special_settings[name]())
2013
tcp_server.clients.update(set(
2014
client_class(name = section,
2015
config= dict(client_config_items(
2016
client_config, section)))
2017
for section in client_config.sections()))
3420
2018
if not tcp_server.clients:
3421
2019
logger.warning("No clients defined")
3424
if pidfile is not None:
3428
print(pid, file=pidfile)
3430
logger.error("Could not write to file %r with PID %d",
2025
pidfile.write(str(pid) + "\n".encode("utf-8"))
2028
logger.error("Could not write to file %r with PID %d",
2031
# "pidfile" was never created
3433
2033
del pidfilename
3435
for termsig in (signal.SIGHUP, signal.SIGTERM):
3436
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3437
lambda: main_loop.quit() and False)
2035
signal.signal(signal.SIGINT, signal.SIG_IGN)
2037
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2038
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3441
@alternate_dbus_interfaces(
3442
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3443
class MandosDBusService(DBusObjectWithObjectManager):
2041
class MandosDBusService(dbus.service.Object):
3444
2042
"""A D-Bus proxy object"""
3446
2043
def __init__(self):
3447
2044
dbus.service.Object.__init__(self, bus, "/")
3449
2045
_interface = "se.recompile.Mandos"
3451
2047
@dbus.service.signal(_interface, signature="o")
3452
2048
def ClientAdded(self, objpath):
3456
2052
@dbus.service.signal(_interface, signature="ss")
3457
def ClientNotFound(self, key_id, address):
2053
def ClientNotFound(self, fingerprint, address):
3461
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3463
2057
@dbus.service.signal(_interface, signature="os")
3464
2058
def ClientRemoved(self, objpath, name):
3468
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3470
2062
@dbus.service.method(_interface, out_signature="ao")
3471
2063
def GetAllClients(self):
3473
return dbus.Array(c.dbus_object_path for c in
3474
tcp_server.clients.values())
3476
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2065
return dbus.Array(c.dbus_object_path
2066
for c in tcp_server.clients)
3478
2068
@dbus.service.method(_interface,
3479
2069
out_signature="a{oa{sv}}")
3480
2070
def GetAllClientsWithProperties(self):
3482
2072
return dbus.Dictionary(
3483
{c.dbus_object_path: c.GetAll(
3484
"se.recompile.Mandos.Client")
3485
for c in tcp_server.clients.values()},
2073
((c.dbus_object_path, c.GetAll(""))
2074
for c in tcp_server.clients),
3486
2075
signature="oa{sv}")
3488
2077
@dbus.service.method(_interface, in_signature="o")
3489
2078
def RemoveClient(self, object_path):
3491
for c in tcp_server.clients.values():
2080
for c in tcp_server.clients:
3492
2081
if c.dbus_object_path == object_path:
3493
del tcp_server.clients[c.name]
2082
tcp_server.clients.remove(c)
3494
2083
c.remove_from_connection()
3495
# Don't signal the disabling
2084
# Don't signal anything except ClientRemoved
3496
2085
c.disable(quiet=True)
3497
# Emit D-Bus signal for removal
3498
self.client_removed_signal(c)
2087
self.ClientRemoved(object_path, c.name)
3500
2089
raise KeyError(object_path)
3504
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3505
out_signature="a{oa{sa{sv}}}")
3506
def GetManagedObjects(self):
3508
return dbus.Dictionary(
3509
{client.dbus_object_path:
3511
{interface: client.GetAll(interface)
3513
client._get_all_interface_names()})
3514
for client in tcp_server.clients.values()})
3516
def client_added_signal(self, client):
3517
"""Send the new standard signal and the old signal"""
3519
# New standard signal
3520
self.InterfacesAdded(
3521
client.dbus_object_path,
3523
{interface: client.GetAll(interface)
3525
client._get_all_interface_names()}))
3527
self.ClientAdded(client.dbus_object_path)
3529
def client_removed_signal(self, client):
3530
"""Send the new standard signal and the old signal"""
3532
# New standard signal
3533
self.InterfacesRemoved(
3534
client.dbus_object_path,
3535
client._get_all_interface_names())
3537
self.ClientRemoved(client.dbus_object_path,
3540
mandos_dbus_service = MandosDBusService()
3542
# Save modules to variables to exempt the modules from being
3543
# unloaded before the function registered with atexit() is run.
3544
mp = multiprocessing
2093
class MandosDBusServiceTransitional(MandosDBusService):
2094
__metaclass__ = AlternateDBusNamesMetaclass
2095
mandos_dbus_service = MandosDBusServiceTransitional()
3548
2098
"Cleanup function; run on exit"
3552
mp.active_children()
3554
if not (tcp_server.clients or client_settings):
3557
# Store client before exiting. Secrets are encrypted with key
3558
# based on what config file has. If config file is
3559
# removed/edited, old secret will thus be unrecovable.
3561
with PGPEngine() as pgp:
3562
for client in tcp_server.clients.values():
3563
key = client_settings[client.name]["secret"]
3564
client.encrypted_secret = pgp.encrypt(client.secret,
3568
# A list of attributes that can not be pickled
3570
exclude = {"bus", "changedstate", "secret",
3571
"checker", "server_settings"}
3572
for name, typ in inspect.getmembers(dbus.service
3576
client_dict["encrypted_secret"] = (client
3578
for attr in client.client_structure:
3579
if attr not in exclude:
3580
client_dict[attr] = getattr(client, attr)
3582
clients[client.name] = client_dict
3583
del client_settings[client.name]["secret"]
3586
with tempfile.NamedTemporaryFile(
3590
dir=os.path.dirname(stored_state_path),
3591
delete=False) as stored_state:
3592
pickle.dump((clients, client_settings), stored_state,
3594
tempname = stored_state.name
3595
os.rename(tempname, stored_state_path)
3596
except (IOError, OSError) as e:
3602
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3603
logger.warning("Could not save persistent state: {}"
3604
.format(os.strerror(e.errno)))
3606
logger.warning("Could not save persistent state:",
3610
# Delete all clients, and settings from config
3611
2101
while tcp_server.clients:
3612
name, client = tcp_server.clients.popitem()
2102
client = tcp_server.clients.pop()
3614
2104
client.remove_from_connection()
3615
# Don't signal the disabling
2105
client.disable_hook = None
2106
# Don't signal anything except ClientRemoved
3616
2107
client.disable(quiet=True)
3617
# Emit D-Bus signal for removal
3619
mandos_dbus_service.client_removed_signal(client)
3620
client_settings.clear()
2110
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
3622
2113
atexit.register(cleanup)
3624
for client in tcp_server.clients.values():
2115
for client in tcp_server.clients:
3626
# Emit D-Bus signal for adding
3627
mandos_dbus_service.client_added_signal(client)
3628
# Need to initiate checking of clients
3630
client.init_checker()
2118
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3632
2121
tcp_server.enable()
3633
2122
tcp_server.server_activate()
3635
2124
# Find out what port we got
3637
service.port = tcp_server.socket.getsockname()[1]
2125
service.port = tcp_server.socket.getsockname()[1]
3639
2127
logger.info("Now listening on address %r, port %d,"
3640
" flowinfo %d, scope_id %d",
3641
*tcp_server.socket.getsockname())
2128
" flowinfo %d, scope_id %d"
2129
% tcp_server.socket.getsockname())
3643
logger.info("Now listening on address %r, port %d",
3644
*tcp_server.socket.getsockname())
3646
# service.interface = tcp_server.socket.getsockname()[3]
2131
logger.info("Now listening on address %r, port %d"
2132
% tcp_server.socket.getsockname())
2134
#service.interface = tcp_server.socket.getsockname()[3]
3650
# From the Avahi example code
3653
except dbus.exceptions.DBusException as error:
3654
logger.critical("D-Bus Exception", exc_info=error)
3657
# End of Avahi example code
3660
GLib.IOChannel.unix_new(tcp_server.fileno()),
3661
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
3662
lambda *args, **kwargs: (tcp_server.handle_request
3663
(*args[2:], **kwargs) or True))
2137
# From the Avahi example code
2140
except dbus.exceptions.DBusException as error:
2141
logger.critical("DBusException: %s", error)
2144
# End of Avahi example code
2146
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2147
lambda *args, **kwargs:
2148
(tcp_server.handle_request
2149
(*args[2:], **kwargs) or True))
3665
2151
logger.debug("Starting main loop")
3666
2152
main_loop.run()
3667
2153
except AvahiError as error:
3668
logger.critical("Avahi Error", exc_info=error)
2154
logger.critical("AvahiError: %s", error)
3671
2157
except KeyboardInterrupt: