63
import cPickle as pickle
70
import cPickle as pickle
64
73
import multiprocessing
69
82
import dbus.service
84
from gi.repository import GLib
72
85
from dbus.mainloop.glib import DBusGMainLoop
75
88
import xml.dom.minidom
77
import Crypto.Cipher.AES
91
if sys.version_info.major == 2:
94
# Try to find the value of SO_BINDTODEVICE:
96
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
97
# newer, and it is also the most natural place for it:
80
98
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
81
99
except AttributeError:
101
# This is where SO_BINDTODEVICE was up to and including Python
83
103
from IN import SO_BINDTODEVICE
84
104
except ImportError:
85
SO_BINDTODEVICE = None
89
stored_state_path = "/var/lib/mandos/clients.pickle"
105
# In Python 2.7 it seems to have been removed entirely.
106
# Try running the C preprocessor:
108
cc = subprocess.Popen(["cc", "--language=c", "-E",
110
stdin=subprocess.PIPE,
111
stdout=subprocess.PIPE)
112
stdout = cc.communicate(
113
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
114
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
115
except (OSError, ValueError, IndexError):
117
SO_BINDTODEVICE = None
119
if sys.version_info.major == 2:
122
if sys.version_info < (3, 2):
123
configparser.Configparser = configparser.SafeConfigParser
126
stored_state_file = "clients.pickle"
91
128
logger = logging.getLogger()
92
syslogger = (logging.handlers.SysLogHandler
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
94
address = str("/dev/log")))
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
132
if_nametoindex = ctypes.cdll.LoadLibrary(
133
ctypes.util.find_library("c")).if_nametoindex
100
134
except (OSError, AttributeError):
101
136
def if_nametoindex(interface):
102
137
"Get an interface index the hard way, i.e. using fcntl()"
103
138
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
139
with contextlib.closing(socket.socket()) as s:
105
140
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
108
interface_index = struct.unpack(str("I"),
141
struct.pack(b"16s16x", interface))
142
interface_index = struct.unpack("I", ifreq[16:20])[0]
110
143
return interface_index
113
def initlogger(level=logging.WARNING):
146
def copy_function(func):
147
"""Make a copy of a function"""
148
if sys.version_info.major == 2:
149
return types.FunctionType(func.func_code,
155
return types.FunctionType(func.__code__,
162
def initlogger(debug, level=logging.WARNING):
114
163
"""init logger and add loglevel"""
166
syslogger = (logging.handlers.SysLogHandler(
167
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
116
169
syslogger.setFormatter(logging.Formatter
117
170
('Mandos [%(process)d]: %(levelname)s:'
119
172
logger.addHandler(syslogger)
121
console = logging.StreamHandler()
122
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
126
logger.addHandler(console)
175
console = logging.StreamHandler()
176
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
180
logger.addHandler(console)
127
181
logger.setLevel(level)
184
class PGPError(Exception):
185
"""Exception if encryption/decryption fails"""
190
"""A simple class for OpenPGP symmetric encryption & decryption"""
193
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
196
output = subprocess.check_output(["gpgconf"])
197
for line in output.splitlines():
198
name, text, path = line.split(b":")
203
if e.errno != errno.ENOENT:
205
self.gnupgargs = ['--batch',
206
'--homedir', self.tempdir,
209
# Only GPG version 1 has the --no-use-agent option.
210
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
211
self.gnupgargs.append("--no-use-agent")
216
def __exit__(self, exc_type, exc_value, traceback):
224
if self.tempdir is not None:
225
# Delete contents of tempdir
226
for root, dirs, files in os.walk(self.tempdir,
228
for filename in files:
229
os.remove(os.path.join(root, filename))
231
os.rmdir(os.path.join(root, dirname))
233
os.rmdir(self.tempdir)
236
def password_encode(self, password):
237
# Passphrase can not be empty and can not contain newlines or
238
# NUL bytes. So we prefix it and hex encode it.
239
encoded = b"mandos" + binascii.hexlify(password)
240
if len(encoded) > 2048:
241
# GnuPG can't handle long passwords, so encode differently
242
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
243
.replace(b"\n", b"\\n")
244
.replace(b"\0", b"\\x00"))
247
def encrypt(self, data, password):
248
passphrase = self.password_encode(password)
249
with tempfile.NamedTemporaryFile(
250
dir=self.tempdir) as passfile:
251
passfile.write(passphrase)
253
proc = subprocess.Popen([self.gpg, '--symmetric',
257
stdin=subprocess.PIPE,
258
stdout=subprocess.PIPE,
259
stderr=subprocess.PIPE)
260
ciphertext, err = proc.communicate(input=data)
261
if proc.returncode != 0:
265
def decrypt(self, data, password):
266
passphrase = self.password_encode(password)
267
with tempfile.NamedTemporaryFile(
268
dir=self.tempdir) as passfile:
269
passfile.write(passphrase)
271
proc = subprocess.Popen([self.gpg, '--decrypt',
275
stdin=subprocess.PIPE,
276
stdout=subprocess.PIPE,
277
stderr=subprocess.PIPE)
278
decrypted_plaintext, err = proc.communicate(input=data)
279
if proc.returncode != 0:
281
return decrypted_plaintext
284
# Pretend that we have an Avahi module
286
"""This isn't so much a class as it is a module-like namespace."""
287
IF_UNSPEC = -1 # avahi-common/address.h
288
PROTO_UNSPEC = -1 # avahi-common/address.h
289
PROTO_INET = 0 # avahi-common/address.h
290
PROTO_INET6 = 1 # avahi-common/address.h
291
DBUS_NAME = "org.freedesktop.Avahi"
292
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
293
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
294
DBUS_PATH_SERVER = "/"
297
def string_array_to_txt_array(t):
298
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
299
for s in t), signature="ay")
300
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
301
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
302
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
303
SERVER_INVALID = 0 # avahi-common/defs.h
304
SERVER_REGISTERING = 1 # avahi-common/defs.h
305
SERVER_RUNNING = 2 # avahi-common/defs.h
306
SERVER_COLLISION = 3 # avahi-common/defs.h
307
SERVER_FAILURE = 4 # avahi-common/defs.h
130
310
class AvahiError(Exception):
131
311
def __init__(self, value, *args, **kwargs):
132
312
self.value = value
133
super(AvahiError, self).__init__(value, *args, **kwargs)
134
def __unicode__(self):
135
return unicode(repr(self.value))
313
return super(AvahiError, self).__init__(value, *args,
137
317
class AvahiServiceError(AvahiError):
140
321
class AvahiGroupError(AvahiError):
144
class AvahiService(object):
145
326
"""An Avahi (Zeroconf) service.
148
329
interface: integer; avahi.IF_UNSPEC or an interface index.
149
330
Used to optionally bind to the specified interface.
150
331
name: string; Example: 'Mandos'
151
332
type: string; Example: '_mandos._tcp'.
152
See <http://www.dns-sd.org/ServiceTypes.html>
333
See <https://www.iana.org/assignments/service-names-port-numbers>
153
334
port: integer; what port to announce
154
335
TXT: list of strings; TXT record for the service
155
336
domain: string; Domain to publish on, default to .local if empty.
284
495
follow_name_owner_changes=True),
285
496
avahi.DBUS_INTERFACE_SERVER)
286
497
self.server.connect_to_signal("StateChanged",
287
self.server_state_changed)
498
self.server_state_changed)
288
499
self.server_state_changed(self.server.GetState())
290
502
class AvahiServiceToSyslog(AvahiService):
503
def rename(self, *args, **kwargs):
292
504
"""Add the new name to the syslog messages"""
293
ret = AvahiService.rename(self)
294
syslogger.setFormatter(logging.Formatter
295
('Mandos (%s) [%%(process)d]:'
296
' %%(levelname)s: %%(message)s'
505
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
506
syslogger.setFormatter(logging.Formatter(
507
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
300
def _timedelta_to_milliseconds(td):
301
"Convert a datetime.timedelta() to milliseconds"
302
return ((td.days * 24 * 60 * 60 * 1000)
303
+ (td.seconds * 1000)
304
+ (td.microseconds // 1000))
306
class Client(object):
512
# Pretend that we have a GnuTLS module
514
"""This isn't so much a class as it is a module-like namespace."""
516
library = ctypes.util.find_library("gnutls")
518
library = ctypes.util.find_library("gnutls-deb0")
519
_library = ctypes.cdll.LoadLibrary(library)
522
# Unless otherwise indicated, the constants and types below are
523
# all from the gnutls/gnutls.h C header file.
534
E_NO_CERTIFICATE_FOUND = -49
539
KEYID_USE_SHA256 = 1 # gnutls/x509.h
540
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
543
class session_int(ctypes.Structure):
545
session_t = ctypes.POINTER(session_int)
547
class certificate_credentials_st(ctypes.Structure):
549
certificate_credentials_t = ctypes.POINTER(
550
certificate_credentials_st)
551
certificate_type_t = ctypes.c_int
553
class datum_t(ctypes.Structure):
554
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
555
('size', ctypes.c_uint)]
557
class openpgp_crt_int(ctypes.Structure):
559
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
560
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
561
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
562
credentials_type_t = ctypes.c_int
563
transport_ptr_t = ctypes.c_void_p
564
close_request_t = ctypes.c_int
567
class Error(Exception):
568
def __init__(self, message=None, code=None, args=()):
569
# Default usage is by a message string, but if a return
570
# code is passed, convert it to a string with
573
if message is None and code is not None:
574
message = gnutls.strerror(code)
575
return super(gnutls.Error, self).__init__(
578
class CertificateSecurityError(Error):
584
self._c_object = gnutls.certificate_credentials_t()
585
gnutls.certificate_allocate_credentials(
586
ctypes.byref(self._c_object))
587
self.type = gnutls.CRD_CERTIFICATE
590
gnutls.certificate_free_credentials(self._c_object)
593
def __init__(self, socket, credentials=None):
594
self._c_object = gnutls.session_t()
595
gnutls_flags = gnutls.CLIENT
596
if gnutls.check_version(b"3.5.6"):
597
gnutls_flags |= gnutls.NO_TICKETS
599
gnutls_flags |= gnutls.ENABLE_RAWPK
600
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
602
gnutls.set_default_priority(self._c_object)
603
gnutls.transport_set_ptr(self._c_object, socket.fileno())
604
gnutls.handshake_set_private_extensions(self._c_object,
607
if credentials is None:
608
credentials = gnutls.Credentials()
609
gnutls.credentials_set(self._c_object, credentials.type,
610
ctypes.cast(credentials._c_object,
612
self.credentials = credentials
615
gnutls.deinit(self._c_object)
618
return gnutls.handshake(self._c_object)
620
def send(self, data):
624
data_len -= gnutls.record_send(self._c_object,
629
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
631
# Error handling functions
632
def _error_code(result):
633
"""A function to raise exceptions on errors, suitable
634
for the 'restype' attribute on ctypes functions"""
637
if result == gnutls.E_NO_CERTIFICATE_FOUND:
638
raise gnutls.CertificateSecurityError(code=result)
639
raise gnutls.Error(code=result)
641
def _retry_on_error(result, func, arguments):
642
"""A function to retry on some errors, suitable
643
for the 'errcheck' attribute on ctypes functions"""
645
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
646
return _error_code(result)
647
result = func(*arguments)
650
# Unless otherwise indicated, the function declarations below are
651
# all from the gnutls/gnutls.h C header file.
654
priority_set_direct = _library.gnutls_priority_set_direct
655
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
656
ctypes.POINTER(ctypes.c_char_p)]
657
priority_set_direct.restype = _error_code
659
init = _library.gnutls_init
660
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
661
init.restype = _error_code
663
set_default_priority = _library.gnutls_set_default_priority
664
set_default_priority.argtypes = [session_t]
665
set_default_priority.restype = _error_code
667
record_send = _library.gnutls_record_send
668
record_send.argtypes = [session_t, ctypes.c_void_p,
670
record_send.restype = ctypes.c_ssize_t
671
record_send.errcheck = _retry_on_error
673
certificate_allocate_credentials = (
674
_library.gnutls_certificate_allocate_credentials)
675
certificate_allocate_credentials.argtypes = [
676
ctypes.POINTER(certificate_credentials_t)]
677
certificate_allocate_credentials.restype = _error_code
679
certificate_free_credentials = (
680
_library.gnutls_certificate_free_credentials)
681
certificate_free_credentials.argtypes = [
682
certificate_credentials_t]
683
certificate_free_credentials.restype = None
685
handshake_set_private_extensions = (
686
_library.gnutls_handshake_set_private_extensions)
687
handshake_set_private_extensions.argtypes = [session_t,
689
handshake_set_private_extensions.restype = None
691
credentials_set = _library.gnutls_credentials_set
692
credentials_set.argtypes = [session_t, credentials_type_t,
694
credentials_set.restype = _error_code
696
strerror = _library.gnutls_strerror
697
strerror.argtypes = [ctypes.c_int]
698
strerror.restype = ctypes.c_char_p
700
certificate_type_get = _library.gnutls_certificate_type_get
701
certificate_type_get.argtypes = [session_t]
702
certificate_type_get.restype = _error_code
704
certificate_get_peers = _library.gnutls_certificate_get_peers
705
certificate_get_peers.argtypes = [session_t,
706
ctypes.POINTER(ctypes.c_uint)]
707
certificate_get_peers.restype = ctypes.POINTER(datum_t)
709
global_set_log_level = _library.gnutls_global_set_log_level
710
global_set_log_level.argtypes = [ctypes.c_int]
711
global_set_log_level.restype = None
713
global_set_log_function = _library.gnutls_global_set_log_function
714
global_set_log_function.argtypes = [log_func]
715
global_set_log_function.restype = None
717
deinit = _library.gnutls_deinit
718
deinit.argtypes = [session_t]
719
deinit.restype = None
721
handshake = _library.gnutls_handshake
722
handshake.argtypes = [session_t]
723
handshake.restype = _error_code
724
handshake.errcheck = _retry_on_error
726
transport_set_ptr = _library.gnutls_transport_set_ptr
727
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
728
transport_set_ptr.restype = None
730
bye = _library.gnutls_bye
731
bye.argtypes = [session_t, close_request_t]
732
bye.restype = _error_code
733
bye.errcheck = _retry_on_error
735
check_version = _library.gnutls_check_version
736
check_version.argtypes = [ctypes.c_char_p]
737
check_version.restype = ctypes.c_char_p
739
_need_version = b"3.3.0"
740
if check_version(_need_version) is None:
741
raise self.Error("Needs GnuTLS {} or later"
742
.format(_need_version))
744
_tls_rawpk_version = b"3.6.6"
745
has_rawpk = bool(check_version(_tls_rawpk_version))
749
class pubkey_st(ctypes.Structure):
751
pubkey_t = ctypes.POINTER(pubkey_st)
753
x509_crt_fmt_t = ctypes.c_int
755
# All the function declarations below are from gnutls/abstract.h
756
pubkey_init = _library.gnutls_pubkey_init
757
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
758
pubkey_init.restype = _error_code
760
pubkey_import = _library.gnutls_pubkey_import
761
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
763
pubkey_import.restype = _error_code
765
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
766
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
767
ctypes.POINTER(ctypes.c_ubyte),
768
ctypes.POINTER(ctypes.c_size_t)]
769
pubkey_get_key_id.restype = _error_code
771
pubkey_deinit = _library.gnutls_pubkey_deinit
772
pubkey_deinit.argtypes = [pubkey_t]
773
pubkey_deinit.restype = None
775
# All the function declarations below are from gnutls/openpgp.h
777
openpgp_crt_init = _library.gnutls_openpgp_crt_init
778
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
779
openpgp_crt_init.restype = _error_code
781
openpgp_crt_import = _library.gnutls_openpgp_crt_import
782
openpgp_crt_import.argtypes = [openpgp_crt_t,
783
ctypes.POINTER(datum_t),
785
openpgp_crt_import.restype = _error_code
787
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
788
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
789
ctypes.POINTER(ctypes.c_uint)]
790
openpgp_crt_verify_self.restype = _error_code
792
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
793
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
794
openpgp_crt_deinit.restype = None
796
openpgp_crt_get_fingerprint = (
797
_library.gnutls_openpgp_crt_get_fingerprint)
798
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
802
openpgp_crt_get_fingerprint.restype = _error_code
804
if check_version(b"3.6.4"):
805
certificate_type_get2 = _library.gnutls_certificate_type_get2
806
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
807
certificate_type_get2.restype = _error_code
809
# Remove non-public functions
810
del _error_code, _retry_on_error
813
def call_pipe(connection, # : multiprocessing.Connection
814
func, *args, **kwargs):
815
"""This function is meant to be called by multiprocessing.Process
817
This function runs func(*args, **kwargs), and writes the resulting
818
return value on the provided multiprocessing.Connection.
820
connection.send(func(*args, **kwargs))
307
825
"""A representation of a client host served by this server.
310
_approved: bool(); 'None' if not yet approved/disapproved
828
approved: bool(); 'None' if not yet approved/disapproved
311
829
approval_delay: datetime.timedelta(); Time to wait for approval
312
830
approval_duration: datetime.timedelta(); Duration of one approval
313
checker: subprocess.Popen(); a running checker process used
314
to see if the client lives.
315
'None' if no process is running.
316
checker_callback_tag: a gobject event source tag, or None
831
checker: multiprocessing.Process(); a running checker process used
832
to see if the client lives. 'None' if no process is
834
checker_callback_tag: a GLib event source tag, or None
317
835
checker_command: string; External command which is run to check
318
836
if client lives. %() expansions are done at
319
837
runtime with vars(self) as dict, so that for
320
838
instance %(name)s can be used in the command.
321
checker_initiator_tag: a gobject event source tag, or None
839
checker_initiator_tag: a GLib event source tag, or None
322
840
created: datetime.datetime(); (UTC) object creation
323
841
client_structure: Object describing what attributes a client has
324
842
and is used for storing the client at exit
325
843
current_checker_command: string; current running checker_command
326
disable_initiator_tag: a gobject event source tag, or None
844
disable_initiator_tag: a GLib event source tag, or None
328
846
fingerprint: string (40 or 32 hexadecimal digits); used to
329
uniquely identify the client
847
uniquely identify an OpenPGP client
848
key_id: string (64 hexadecimal digits); used to uniquely identify
849
a client using raw public keys
330
850
host: string; available for use by the checker command
331
851
interval: datetime.timedelta(); How often to start a new checker
332
852
last_approval_request: datetime.datetime(); (UTC) or None
333
853
last_checked_ok: datetime.datetime(); (UTC) or None
334
last_checker_status: integer between 0 and 255 reflecting exit status
335
of last checker. -1 reflect crashed checker,
337
last_enabled: datetime.datetime(); (UTC)
854
last_checker_status: integer between 0 and 255 reflecting exit
855
status of last checker. -1 reflects crashed
856
checker, -2 means no checker completed yet.
857
last_checker_signal: The signal which killed the last checker, if
858
last_checker_status is -1
859
last_enabled: datetime.datetime(); (UTC) or None
338
860
name: string; from the config file, used in log messages and
339
861
D-Bus identifiers
340
862
secret: bytestring; sent verbatim (over TLS) to client
341
863
timeout: datetime.timedelta(); How long from last_checked_ok
342
864
until this client is disabled
343
extended_timeout: extra long timeout when password has been sent
865
extended_timeout: extra long timeout when secret has been sent
344
866
runtime_expansions: Allowed attributes for runtime expansion.
345
867
expires: datetime.datetime(); time (UTC) when a client will be
346
868
disabled, or None
869
server_settings: The server_settings dict from main()
349
872
runtime_expansions = ("approval_delay", "approval_duration",
350
"created", "enabled", "fingerprint",
351
"host", "interval", "last_checked_ok",
873
"created", "enabled", "expires", "key_id",
874
"fingerprint", "host", "interval",
875
"last_approval_request", "last_checked_ok",
352
876
"last_enabled", "name", "timeout")
354
def timeout_milliseconds(self):
355
"Return the 'timeout' attribute in milliseconds"
356
return _timedelta_to_milliseconds(self.timeout)
358
def extended_timeout_milliseconds(self):
359
"Return the 'extended_timeout' attribute in milliseconds"
360
return _timedelta_to_milliseconds(self.extended_timeout)
362
def interval_milliseconds(self):
363
"Return the 'interval' attribute in milliseconds"
364
return _timedelta_to_milliseconds(self.interval)
366
def approval_delay_milliseconds(self):
367
return _timedelta_to_milliseconds(self.approval_delay)
369
def __init__(self, name = None, config=None):
370
"""Note: the 'checker' key in 'config' sets the
371
'checker_command' attribute and *not* the 'checker'
879
"extended_timeout": "PT15M",
881
"checker": "fping -q -- %%(host)s",
883
"approval_delay": "PT0S",
884
"approval_duration": "PT1S",
885
"approved_by_default": "True",
890
def config_parser(config):
891
"""Construct a new dict of client settings of this form:
892
{ client_name: {setting_name: value, ...}, ...}
893
with exceptions for any special settings as defined above.
894
NOTE: Must be a pure function. Must return the same result
895
value given the same arguments.
898
for client_name in config.sections():
899
section = dict(config.items(client_name))
900
client = settings[client_name] = {}
902
client["host"] = section["host"]
903
# Reformat values from string types to Python types
904
client["approved_by_default"] = config.getboolean(
905
client_name, "approved_by_default")
906
client["enabled"] = config.getboolean(client_name,
909
# Uppercase and remove spaces from key_id and fingerprint
910
# for later comparison purposes with return value from the
911
# key_id() and fingerprint() functions
912
client["key_id"] = (section.get("key_id", "").upper()
914
client["fingerprint"] = (section["fingerprint"].upper()
916
if "secret" in section:
917
client["secret"] = codecs.decode(section["secret"]
920
elif "secfile" in section:
921
with open(os.path.expanduser(os.path.expandvars
922
(section["secfile"])),
924
client["secret"] = secfile.read()
926
raise TypeError("No secret or secfile for section {}"
928
client["timeout"] = string_to_delta(section["timeout"])
929
client["extended_timeout"] = string_to_delta(
930
section["extended_timeout"])
931
client["interval"] = string_to_delta(section["interval"])
932
client["approval_delay"] = string_to_delta(
933
section["approval_delay"])
934
client["approval_duration"] = string_to_delta(
935
section["approval_duration"])
936
client["checker_command"] = section["checker"]
937
client["last_approval_request"] = None
938
client["last_checked_ok"] = None
939
client["last_checker_status"] = -2
943
def __init__(self, settings, name=None, server_settings=None):
945
if server_settings is None:
947
self.server_settings = server_settings
948
# adding all client settings
949
for setting, value in settings.items():
950
setattr(self, setting, value)
953
if not hasattr(self, "last_enabled"):
954
self.last_enabled = datetime.datetime.utcnow()
955
if not hasattr(self, "expires"):
956
self.expires = (datetime.datetime.utcnow()
959
self.last_enabled = None
376
962
logger.debug("Creating client %r", self.name)
377
# Uppercase and remove spaces from fingerprint for later
378
# comparison purposes with return value from the fingerprint()
380
self.fingerprint = (config["fingerprint"].upper()
963
logger.debug(" Key ID: %s", self.key_id)
382
964
logger.debug(" Fingerprint: %s", self.fingerprint)
383
if "secret" in config:
384
self.secret = config["secret"].decode("base64")
385
elif "secfile" in config:
386
with open(os.path.expanduser(os.path.expandvars
387
(config["secfile"])),
389
self.secret = secfile.read()
391
raise TypeError("No secret or secfile for client %s"
393
self.host = config.get("host", "")
394
self.created = datetime.datetime.utcnow()
396
self.last_approval_request = None
397
self.last_enabled = datetime.datetime.utcnow()
398
self.last_checked_ok = None
399
self.last_checker_status = None
400
self.timeout = string_to_delta(config["timeout"])
401
self.extended_timeout = string_to_delta(config
402
["extended_timeout"])
403
self.interval = string_to_delta(config["interval"])
965
self.created = settings.get("created",
966
datetime.datetime.utcnow())
968
# attributes specific for this server instance
404
969
self.checker = None
405
970
self.checker_initiator_tag = None
406
971
self.disable_initiator_tag = None
407
self.expires = datetime.datetime.utcnow() + self.timeout
408
972
self.checker_callback_tag = None
409
self.checker_command = config["checker"]
410
973
self.current_checker_command = None
411
self._approved = None
412
self.approved_by_default = config.get("approved_by_default",
414
975
self.approvals_pending = 0
415
self.approval_delay = string_to_delta(
416
config["approval_delay"])
417
self.approval_duration = string_to_delta(
418
config["approval_duration"])
419
self.changedstate = (multiprocessing_manager
420
.Condition(multiprocessing_manager
422
self.client_structure = [attr for attr in self.__dict__.iterkeys() if not attr.startswith("_")]
976
self.changedstate = multiprocessing_manager.Condition(
977
multiprocessing_manager.Lock())
978
self.client_structure = [attr
979
for attr in self.__dict__.keys()
980
if not attr.startswith("_")]
423
981
self.client_structure.append("client_structure")
426
for name, t in inspect.getmembers(type(self),
427
lambda obj: isinstance(obj, property)):
983
for name, t in inspect.getmembers(
984
type(self), lambda obj: isinstance(obj, property)):
428
985
if not name.startswith("_"):
429
986
self.client_structure.append(name)
431
988
# Send notice to process children that client state has changed
432
989
def send_changedstate(self):
433
990
with self.changedstate:
434
991
self.changedstate.notify_all()
436
993
def enable(self):
437
994
"""Start this client's checker and timeout hooks"""
438
995
if getattr(self, "enabled", False):
439
996
# Already enabled
441
self.send_changedstate()
442
998
self.expires = datetime.datetime.utcnow() + self.timeout
443
999
self.enabled = True
444
1000
self.last_enabled = datetime.datetime.utcnow()
445
1001
self.init_checker()
1002
self.send_changedstate()
447
1004
def disable(self, quiet=True):
448
1005
"""Disable this client."""
449
1006
if not getattr(self, "enabled", False):
452
self.send_changedstate()
454
1009
logger.info("Disabling client %s", self.name)
455
if getattr(self, "disable_initiator_tag", False):
456
gobject.source_remove(self.disable_initiator_tag)
1010
if getattr(self, "disable_initiator_tag", None) is not None:
1011
GLib.source_remove(self.disable_initiator_tag)
457
1012
self.disable_initiator_tag = None
458
1013
self.expires = None
459
if getattr(self, "checker_initiator_tag", False):
460
gobject.source_remove(self.checker_initiator_tag)
1014
if getattr(self, "checker_initiator_tag", None) is not None:
1015
GLib.source_remove(self.checker_initiator_tag)
461
1016
self.checker_initiator_tag = None
462
1017
self.stop_checker()
463
1018
self.enabled = False
464
# Do not run this again if called by a gobject.timeout_add
1020
self.send_changedstate()
1021
# Do not run this again if called by a GLib.timeout_add
467
1024
def __del__(self):
470
1027
def init_checker(self):
471
1028
# Schedule a new checker to be started an 'interval' from now,
472
1029
# and every interval from then on.
473
self.checker_initiator_tag = (gobject.timeout_add
474
(self.interval_milliseconds(),
1030
if self.checker_initiator_tag is not None:
1031
GLib.source_remove(self.checker_initiator_tag)
1032
self.checker_initiator_tag = GLib.timeout_add(
1033
int(self.interval.total_seconds() * 1000),
476
1035
# Schedule a disable() when 'timeout' has passed
477
self.disable_initiator_tag = (gobject.timeout_add
478
(self.timeout_milliseconds(),
1036
if self.disable_initiator_tag is not None:
1037
GLib.source_remove(self.disable_initiator_tag)
1038
self.disable_initiator_tag = GLib.timeout_add(
1039
int(self.timeout.total_seconds() * 1000), self.disable)
480
1040
# Also start a new checker *right now*.
481
1041
self.start_checker()
484
def checker_callback(self, pid, condition, command):
1043
def checker_callback(self, source, condition, connection,
485
1045
"""The checker has completed, so take appropriate actions."""
1046
# Read return code from connection (see call_pipe)
1047
returncode = connection.recv()
486
1050
self.checker_callback_tag = None
487
1051
self.checker = None
488
if os.WIFEXITED(condition):
489
self.last_checker_status = os.WEXITSTATUS(condition)
1054
self.last_checker_status = returncode
1055
self.last_checker_signal = None
490
1056
if self.last_checker_status == 0:
491
1057
logger.info("Checker for %(name)s succeeded",
493
1059
self.checked_ok()
495
logger.info("Checker for %(name)s failed",
1061
logger.info("Checker for %(name)s failed", vars(self))
498
1063
self.last_checker_status = -1
1064
self.last_checker_signal = -returncode
499
1065
logger.warning("Checker for %(name)s crashed?",
502
def checked_ok(self, timeout=None):
503
"""Bump up the timeout for this client.
505
This should only be called when the client has been seen,
1069
def checked_ok(self):
1070
"""Assert that the client has been seen, alive and well."""
1071
self.last_checked_ok = datetime.datetime.utcnow()
1072
self.last_checker_status = 0
1073
self.last_checker_signal = None
1076
def bump_timeout(self, timeout=None):
1077
"""Bump up the timeout for this client."""
508
1078
if timeout is None:
509
1079
timeout = self.timeout
510
self.last_checked_ok = datetime.datetime.utcnow()
511
1080
if self.disable_initiator_tag is not None:
512
gobject.source_remove(self.disable_initiator_tag)
1081
GLib.source_remove(self.disable_initiator_tag)
1082
self.disable_initiator_tag = None
513
1083
if getattr(self, "enabled", False):
514
self.disable_initiator_tag = (gobject.timeout_add
515
(_timedelta_to_milliseconds
516
(timeout), self.disable))
1084
self.disable_initiator_tag = GLib.timeout_add(
1085
int(timeout.total_seconds() * 1000), self.disable)
517
1086
self.expires = datetime.datetime.utcnow() + timeout
519
1088
def need_approval(self):
520
1089
self.last_approval_request = datetime.datetime.utcnow()
522
1091
def start_checker(self):
523
1092
"""Start a new checker subprocess if one is not running.
525
1094
If a checker already exists, leave it running and do
527
1096
# The reason for not killing a running checker is that if we
528
# did that, then if a checker (for some reason) started
529
# running slowly and taking more than 'interval' time, the
530
# client would inevitably timeout, since no checker would get
531
# a chance to run to completion. If we instead leave running
1097
# did that, and if a checker (for some reason) started running
1098
# slowly and taking more than 'interval' time, then the client
1099
# would inevitably timeout, since no checker would get a
1100
# chance to run to completion. If we instead leave running
532
1101
# checkers alone, the checker would have to take more time
533
1102
# than 'timeout' for the client to be disabled, which is as it
536
# If a checker exists, make sure it is not a zombie
538
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
539
except (AttributeError, OSError) as error:
540
if (isinstance(error, OSError)
541
and error.errno != errno.ECHILD):
545
logger.warning("Checker was a zombie")
546
gobject.source_remove(self.checker_callback_tag)
547
self.checker_callback(pid, status,
548
self.current_checker_command)
1105
if self.checker is not None and not self.checker.is_alive():
1106
logger.warning("Checker was not alive; joining")
549
1109
# Start a new checker if needed
550
1110
if self.checker is None:
1111
# Escape attributes for the shell
1113
attr: re.escape(str(getattr(self, attr)))
1114
for attr in self.runtime_expansions}
552
# In case checker_command has exactly one % operator
553
command = self.checker_command % self.host
555
# Escape attributes for the shell
556
escaped_attrs = dict(
558
re.escape(unicode(str(getattr(self, attr, "")),
562
self.runtime_expansions)
565
command = self.checker_command % escaped_attrs
566
except TypeError as error:
567
logger.error('Could not format string "%s":'
568
' %s', self.checker_command, error)
569
return True # Try again later
1116
command = self.checker_command % escaped_attrs
1117
except TypeError as error:
1118
logger.error('Could not format string "%s"',
1119
self.checker_command,
1121
return True # Try again later
570
1122
self.current_checker_command = command
572
logger.info("Starting checker %r for %s",
574
# We don't need to redirect stdout and stderr, since
575
# in normal mode, that is already done by daemon(),
576
# and in debug mode we don't want to. (Stdin is
577
# always replaced by /dev/null.)
578
self.checker = subprocess.Popen(command,
581
self.checker_callback_tag = (gobject.child_watch_add
583
self.checker_callback,
585
# The checker may have completed before the gobject
586
# watch was added. Check for this.
587
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
589
gobject.source_remove(self.checker_callback_tag)
590
self.checker_callback(pid, status, command)
591
except OSError as error:
592
logger.error("Failed to start subprocess: %s",
594
# Re-run this periodically if run by gobject.timeout_add
1123
logger.info("Starting checker %r for %s", command,
1125
# We don't need to redirect stdout and stderr, since
1126
# in normal mode, that is already done by daemon(),
1127
# and in debug mode we don't want to. (Stdin is
1128
# always replaced by /dev/null.)
1129
# The exception is when not debugging but nevertheless
1130
# running in the foreground; use the previously
1132
popen_args = {"close_fds": True,
1135
if (not self.server_settings["debug"]
1136
and self.server_settings["foreground"]):
1137
popen_args.update({"stdout": wnull,
1139
pipe = multiprocessing.Pipe(duplex=False)
1140
self.checker = multiprocessing.Process(
1142
args=(pipe[1], subprocess.call, command),
1144
self.checker.start()
1145
self.checker_callback_tag = GLib.io_add_watch(
1146
pipe[0].fileno(), GLib.IO_IN,
1147
self.checker_callback, pipe[0], command)
1148
# Re-run this periodically if run by GLib.timeout_add
597
1151
def stop_checker(self):
598
1152
"""Force the checker process, if any, to stop."""
599
1153
if self.checker_callback_tag:
600
gobject.source_remove(self.checker_callback_tag)
1154
GLib.source_remove(self.checker_callback_tag)
601
1155
self.checker_callback_tag = None
602
1156
if getattr(self, "checker", None) is None:
604
1158
logger.debug("Stopping checker for %(name)s", vars(self))
606
os.kill(self.checker.pid, signal.SIGTERM)
608
#if self.checker.poll() is None:
609
# os.kill(self.checker.pid, signal.SIGKILL)
610
except OSError as error:
611
if error.errno != errno.ESRCH: # No such process
1159
self.checker.terminate()
613
1160
self.checker = None
615
# Encrypts a client secret and stores it in a varible encrypted_secret
616
def encrypt_secret(self, key):
617
# Encryption-key need to be of a specific size, so we hash inputed key
618
hasheng = hashlib.sha256()
620
encryptionkey = hasheng.digest()
622
# Create validation hash so we know at decryption if it was sucessful
623
hasheng = hashlib.sha256()
624
hasheng.update(self.secret)
625
validationhash = hasheng.digest()
628
iv = os.urandom(Crypto.Cipher.AES.block_size)
629
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
630
Crypto.Cipher.AES.MODE_CFB, iv)
631
ciphertext = ciphereng.encrypt(validationhash+self.secret)
632
self.encrypted_secret = (ciphertext, iv)
634
# Decrypt a encrypted client secret
635
def decrypt_secret(self, key):
636
# Decryption-key need to be of a specific size, so we hash inputed key
637
hasheng = hashlib.sha256()
639
encryptionkey = hasheng.digest()
641
# Decrypt encrypted secret
642
ciphertext, iv = self.encrypted_secret
643
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
644
Crypto.Cipher.AES.MODE_CFB, iv)
645
plain = ciphereng.decrypt(ciphertext)
647
# Validate decrypted secret to know if it was succesful
648
hasheng = hashlib.sha256()
649
validationhash = plain[:hasheng.digest_size]
650
secret = plain[hasheng.digest_size:]
651
hasheng.update(secret)
653
# if validation fails, we use key as new secret. Otherwhise, we use
654
# the decrypted secret
655
if hasheng.digest() == validationhash:
659
del self.encrypted_secret
662
def dbus_service_property(dbus_interface, signature="v",
663
access="readwrite", byte_arrays=False):
1163
def dbus_service_property(dbus_interface,
664
1167
"""Decorators for marking methods of a DBusObjectWithProperties to
665
1168
become properties on the D-Bus.
667
1170
The decorated method will be called with no arguments by "Get"
668
1171
and with one argument by "Set".
670
1173
The parameters, where they are supported, are the same as
671
1174
dbus.service.method, except there is only "signature", since the
672
1175
type from Get() and the type sent to Set() is the same.
842
1508
except (AttributeError, xml.dom.DOMException,
843
1509
xml.parsers.expat.ExpatError) as error:
844
1510
logger.error("Failed to override Introspection method",
849
def datetime_to_dbus (dt, variant_level=0):
1516
dbus.OBJECT_MANAGER_IFACE
1517
except AttributeError:
1518
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1521
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1522
"""A D-Bus object with an ObjectManager.
1524
Classes inheriting from this exposes the standard
1525
GetManagedObjects call and the InterfacesAdded and
1526
InterfacesRemoved signals on the standard
1527
"org.freedesktop.DBus.ObjectManager" interface.
1529
Note: No signals are sent automatically; they must be sent
1532
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1533
out_signature="a{oa{sa{sv}}}")
1534
def GetManagedObjects(self):
1535
"""This function must be overridden"""
1536
raise NotImplementedError()
1538
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1539
signature="oa{sa{sv}}")
1540
def InterfacesAdded(self, object_path, interfaces_and_properties):
1543
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1544
def InterfacesRemoved(self, object_path, interfaces):
1547
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1549
path_keyword='object_path',
1550
connection_keyword='connection')
1551
def Introspect(self, object_path, connection):
1552
"""Overloading of standard D-Bus method.
1554
Override return argument name of GetManagedObjects to be
1555
"objpath_interfaces_and_properties"
1557
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1561
document = xml.dom.minidom.parseString(xmlstring)
1563
for if_tag in document.getElementsByTagName("interface"):
1564
# Fix argument name for the GetManagedObjects method
1565
if (if_tag.getAttribute("name")
1566
== dbus.OBJECT_MANAGER_IFACE):
1567
for cn in if_tag.getElementsByTagName("method"):
1568
if (cn.getAttribute("name")
1569
== "GetManagedObjects"):
1570
for arg in cn.getElementsByTagName("arg"):
1571
if (arg.getAttribute("direction")
1575
"objpath_interfaces"
1577
xmlstring = document.toxml("utf-8")
1579
except (AttributeError, xml.dom.DOMException,
1580
xml.parsers.expat.ExpatError) as error:
1581
logger.error("Failed to override Introspection method",
1586
def datetime_to_dbus(dt, variant_level=0):
850
1587
"""Convert a UTC datetime.datetime() to a D-Bus type."""
852
return dbus.String("", variant_level = variant_level)
853
return dbus.String(dt.isoformat(),
854
variant_level=variant_level)
856
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
858
"""Applied to an empty subclass of a D-Bus object, this metaclass
859
will add additional D-Bus attributes matching a certain pattern.
1589
return dbus.String("", variant_level=variant_level)
1590
return dbus.String(dt.isoformat(), variant_level=variant_level)
1593
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1594
"""A class decorator; applied to a subclass of
1595
dbus.service.Object, it will add alternate D-Bus attributes with
1596
interface names according to the "alt_interface_names" mapping.
1599
@alternate_dbus_interfaces({"org.example.Interface":
1600
"net.example.AlternateInterface"})
1601
class SampleDBusObject(dbus.service.Object):
1602
@dbus.service.method("org.example.Interface")
1603
def SampleDBusMethod():
1606
The above "SampleDBusMethod" on "SampleDBusObject" will be
1607
reachable via two interfaces: "org.example.Interface" and
1608
"net.example.AlternateInterface", the latter of which will have
1609
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1610
"true", unless "deprecate" is passed with a False value.
1612
This works for methods and signals, and also for D-Bus properties
1613
(from DBusObjectWithProperties) and interfaces (from the
1614
dbus_interface_annotations decorator).
861
def __new__(mcs, name, bases, attr):
862
# Go through all the base classes which could have D-Bus
863
# methods, signals, or properties in them
864
for base in (b for b in bases
865
if issubclass(b, dbus.service.Object)):
866
# Go though all attributes of the base class
867
for attrname, attribute in inspect.getmembers(base):
1618
for orig_interface_name, alt_interface_name in (
1619
alt_interface_names.items()):
1621
interface_names = set()
1622
# Go though all attributes of the class
1623
for attrname, attribute in inspect.getmembers(cls):
868
1624
# Ignore non-D-Bus attributes, and D-Bus attributes
869
1625
# with the wrong interface name
870
1626
if (not hasattr(attribute, "_dbus_interface")
871
or not attribute._dbus_interface
872
.startswith("se.recompile.Mandos")):
1627
or not attribute._dbus_interface.startswith(
1628
orig_interface_name)):
874
1630
# Create an alternate D-Bus interface name based on
875
1631
# the current name
876
alt_interface = (attribute._dbus_interface
877
.replace("se.recompile.Mandos",
878
"se.bsnet.fukt.Mandos"))
1632
alt_interface = attribute._dbus_interface.replace(
1633
orig_interface_name, alt_interface_name)
1634
interface_names.add(alt_interface)
879
1635
# Is this a D-Bus signal?
880
1636
if getattr(attribute, "_dbus_is_signal", False):
881
# Extract the original non-method function by
883
nonmethod_func = (dict(
1637
# Extract the original non-method undecorated
1638
# function by black magic
1639
if sys.version_info.major == 2:
1640
nonmethod_func = (dict(
884
1641
zip(attribute.func_code.co_freevars,
885
attribute.__closure__))["func"]
1642
attribute.__closure__))
1643
["func"].cell_contents)
1645
nonmethod_func = (dict(
1646
zip(attribute.__code__.co_freevars,
1647
attribute.__closure__))
1648
["func"].cell_contents)
887
1649
# Create a new, but exactly alike, function
888
1650
# object, and decorate it to be a new D-Bus signal
889
1651
# with the alternate D-Bus interface name
890
new_function = (dbus.service.signal
892
attribute._dbus_signature)
894
nonmethod_func.func_code,
895
nonmethod_func.func_globals,
896
nonmethod_func.func_name,
897
nonmethod_func.func_defaults,
898
nonmethod_func.func_closure)))
1652
new_function = copy_function(nonmethod_func)
1653
new_function = (dbus.service.signal(
1655
attribute._dbus_signature)(new_function))
1656
# Copy annotations, if any
1658
new_function._dbus_annotations = dict(
1659
attribute._dbus_annotations)
1660
except AttributeError:
899
1663
# Define a creator of a function to call both the
900
# old and new functions, so both the old and new
901
# signals gets sent when the function is called
1664
# original and alternate functions, so both the
1665
# original and alternate signals gets sent when
1666
# the function is called
902
1667
def fixscope(func1, func2):
903
1668
"""This function is a scope container to pass
904
1669
func1 and func2 to the "call_both" function
905
1670
outside of its arguments"""
1672
@functools.wraps(func2)
906
1673
def call_both(*args, **kwargs):
907
1674
"""This function will emit two D-Bus
908
1675
signals by calling func1 and func2"""
909
1676
func1(*args, **kwargs)
910
1677
func2(*args, **kwargs)
1678
# Make wrapper function look like a D-Bus
1680
for name, attr in inspect.getmembers(func2):
1681
if name.startswith("_dbus_"):
1682
setattr(call_both, name, attr)
911
1684
return call_both
912
1685
# Create the "call_both" function and add it to
914
attr[attrname] = fixscope(attribute,
1687
attr[attrname] = fixscope(attribute, new_function)
916
1688
# Is this a D-Bus method?
917
1689
elif getattr(attribute, "_dbus_is_method", False):
918
1690
# Create a new, but exactly alike, function
919
1691
# object. Decorate it to be a new D-Bus method
920
1692
# with the alternate D-Bus interface name. Add it
922
attr[attrname] = (dbus.service.method
924
attribute._dbus_in_signature,
925
attribute._dbus_out_signature)
927
(attribute.func_code,
928
attribute.func_globals,
930
attribute.func_defaults,
931
attribute.func_closure)))
1695
dbus.service.method(
1697
attribute._dbus_in_signature,
1698
attribute._dbus_out_signature)
1699
(copy_function(attribute)))
1700
# Copy annotations, if any
1702
attr[attrname]._dbus_annotations = dict(
1703
attribute._dbus_annotations)
1704
except AttributeError:
932
1706
# Is this a D-Bus property?
933
1707
elif getattr(attribute, "_dbus_is_property", False):
934
1708
# Create a new, but exactly alike, function
935
1709
# object, and decorate it to be a new D-Bus
936
1710
# property with the alternate D-Bus interface
937
1711
# name. Add it to the class.
938
attr[attrname] = (dbus_service_property
940
attribute._dbus_signature,
941
attribute._dbus_access,
943
._dbus_get_args_options
946
(attribute.func_code,
947
attribute.func_globals,
949
attribute.func_defaults,
950
attribute.func_closure)))
951
return type.__new__(mcs, name, bases, attr)
1712
attr[attrname] = (dbus_service_property(
1713
alt_interface, attribute._dbus_signature,
1714
attribute._dbus_access,
1715
attribute._dbus_get_args_options
1717
(copy_function(attribute)))
1718
# Copy annotations, if any
1720
attr[attrname]._dbus_annotations = dict(
1721
attribute._dbus_annotations)
1722
except AttributeError:
1724
# Is this a D-Bus interface?
1725
elif getattr(attribute, "_dbus_is_interface", False):
1726
# Create a new, but exactly alike, function
1727
# object. Decorate it to be a new D-Bus interface
1728
# with the alternate D-Bus interface name. Add it
1731
dbus_interface_annotations(alt_interface)
1732
(copy_function(attribute)))
1734
# Deprecate all alternate interfaces
1735
iname = "_AlternateDBusNames_interface_annotation{}"
1736
for interface_name in interface_names:
1738
@dbus_interface_annotations(interface_name)
1740
return {"org.freedesktop.DBus.Deprecated":
1742
# Find an unused name
1743
for aname in (iname.format(i)
1744
for i in itertools.count()):
1745
if aname not in attr:
1749
# Replace the class with a new subclass of it with
1750
# methods, signals, etc. as created above.
1751
if sys.version_info.major == 2:
1752
cls = type(b"{}Alternate".format(cls.__name__),
1755
cls = type("{}Alternate".format(cls.__name__),
1762
@alternate_dbus_interfaces({"se.recompile.Mandos":
1763
"se.bsnet.fukt.Mandos"})
953
1764
class ClientDBus(Client, DBusObjectWithProperties):
954
1765
"""A Client class using D-Bus
957
1768
dbus_object_path: dbus.ObjectPath
958
1769
bus: dbus.SystemBus()
961
1772
runtime_expansions = (Client.runtime_expansions
962
+ ("dbus_object_path",))
1773
+ ("dbus_object_path", ))
1775
_interface = "se.recompile.Mandos.Client"
964
1777
# dbus.service.Object doesn't use super(), so we can't either.
966
def __init__(self, bus = None, *args, **kwargs):
1779
def __init__(self, bus=None, *args, **kwargs):
968
1781
Client.__init__(self, *args, **kwargs)
970
self._approvals_pending = 0
971
1782
# Only now, when this client is initialized, can it show up on
973
client_object_name = unicode(self.name).translate(
1784
client_object_name = str(self.name).translate(
974
1785
{ord("."): ord("_"),
975
1786
ord("-"): ord("_")})
976
self.dbus_object_path = (dbus.ObjectPath
977
("/clients/" + client_object_name))
1787
self.dbus_object_path = dbus.ObjectPath(
1788
"/clients/" + client_object_name)
978
1789
DBusObjectWithProperties.__init__(self, self.bus,
979
1790
self.dbus_object_path)
981
def notifychangeproperty(transform_func,
982
dbus_name, type_func=lambda x: x,
1792
def notifychangeproperty(transform_func, dbus_name,
1793
type_func=lambda x: x,
1795
invalidate_only=False,
1796
_interface=_interface):
984
1797
""" Modify a variable so that it's a property which announces
985
1798
its changes to DBus.
1345
2193
self.start_checker()
1347
2195
self.stop_checker()
1349
2197
# ObjectPath - property
2199
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2200
"org.freedesktop.DBus.Deprecated": "true"})
1350
2201
@dbus_service_property(_interface, signature="o", access="read")
1351
2202
def ObjectPath_dbus_property(self):
1352
return self.dbus_object_path # is already a dbus.ObjectPath
2203
return self.dbus_object_path # is already a dbus.ObjectPath
1354
2205
# Secret = property
1355
@dbus_service_property(_interface, signature="ay",
1356
access="write", byte_arrays=True)
2207
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2209
@dbus_service_property(_interface,
1357
2213
def Secret_dbus_property(self, value):
1358
self.secret = str(value)
2214
self.secret = bytes(value)
1363
class ProxyClient(object):
1364
def __init__(self, child_pipe, fpr, address):
2220
def __init__(self, child_pipe, key_id, fpr, address):
1365
2221
self._pipe = child_pipe
1366
self._pipe.send(('init', fpr, address))
2222
self._pipe.send(('init', key_id, fpr, address))
1367
2223
if not self._pipe.recv():
2224
raise KeyError(key_id or fpr)
1370
2226
def __getattribute__(self, name):
1371
if(name == '_pipe'):
1372
2228
return super(ProxyClient, self).__getattribute__(name)
1373
2229
self._pipe.send(('getattr', name))
1374
2230
data = self._pipe.recv()
1375
2231
if data[0] == 'data':
1377
2233
if data[0] == 'function':
1378
2235
def func(*args, **kwargs):
1379
2236
self._pipe.send(('funcall', name, args, kwargs))
1380
2237
return self._pipe.recv()[1]
1383
2241
def __setattr__(self, name, value):
1384
if(name == '_pipe'):
1385
2243
return super(ProxyClient, self).__setattr__(name, value)
1386
2244
self._pipe.send(('setattr', name, value))
1388
class ClientDBusTransitional(ClientDBus):
1389
__metaclass__ = AlternateDBusNamesMetaclass
1391
2247
class ClientHandler(socketserver.BaseRequestHandler, object):
1392
2248
"""A class to handle client connections.
1394
2250
Instantiated once for each connection to handle it.
1395
2251
Note: This will run in its own forked process."""
1397
2253
def handle(self):
1398
2254
with contextlib.closing(self.server.child_pipe) as child_pipe:
1399
2255
logger.info("TCP connection from: %s",
1400
unicode(self.client_address))
2256
str(self.client_address))
1401
2257
logger.debug("Pipe FD: %d",
1402
2258
self.server.child_pipe.fileno())
1404
session = (gnutls.connection
1405
.ClientSession(self.request,
1407
.X509Credentials()))
1409
# Note: gnutls.connection.X509Credentials is really a
1410
# generic GnuTLS certificate credentials object so long as
1411
# no X.509 keys are added to it. Therefore, we can use it
1412
# here despite using OpenPGP certificates.
1414
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1415
# "+AES-256-CBC", "+SHA1",
1416
# "+COMP-NULL", "+CTYPE-OPENPGP",
2260
session = gnutls.ClientSession(self.request)
2262
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2263
# "+AES-256-CBC", "+SHA1",
2264
# "+COMP-NULL", "+CTYPE-OPENPGP",
1418
2266
# Use a fallback default, since this MUST be set.
1419
2267
priority = self.server.gnutls_priority
1420
2268
if priority is None:
1421
2269
priority = "NORMAL"
1422
(gnutls.library.functions
1423
.gnutls_priority_set_direct(session._c_object,
2270
gnutls.priority_set_direct(session._c_object,
2271
priority.encode("utf-8"),
1426
2274
# Start communication using the Mandos protocol
1427
2275
# Get protocol number
1428
2276
line = self.request.makefile().readline()
1429
2277
logger.debug("Protocol version: %r", line)
1431
2279
if int(line.strip().split()[0]) > 1:
2280
raise RuntimeError(line)
1433
2281
except (ValueError, IndexError, RuntimeError) as error:
1434
2282
logger.error("Unknown protocol version: %s", error)
1437
2285
# Start GnuTLS connection
1439
2287
session.handshake()
1440
except gnutls.errors.GNUTLSError as error:
2288
except gnutls.Error as error:
1441
2289
logger.warning("Handshake failed: %s", error)
1442
2290
# Do not run session.bye() here: the session is not
1443
2291
# established. Just abandon the request.
1445
2293
logger.debug("Handshake succeeded")
1447
2295
approval_required = False
1450
fpr = self.fingerprint(self.peer_certificate
1453
gnutls.errors.GNUTLSError) as error:
1454
logger.warning("Bad certificate: %s", error)
1456
logger.debug("Fingerprint: %s", fpr)
1457
if self.server.use_dbus:
1459
client.NewRequest(str(self.client_address))
1462
client = ProxyClient(child_pipe, fpr,
2297
if gnutls.has_rawpk:
2300
key_id = self.key_id(
2301
self.peer_certificate(session))
2302
except (TypeError, gnutls.Error) as error:
2303
logger.warning("Bad certificate: %s", error)
2305
logger.debug("Key ID: %s", key_id)
2310
fpr = self.fingerprint(
2311
self.peer_certificate(session))
2312
except (TypeError, gnutls.Error) as error:
2313
logger.warning("Bad certificate: %s", error)
2315
logger.debug("Fingerprint: %s", fpr)
2318
client = ProxyClient(child_pipe, key_id, fpr,
1463
2319
self.client_address)
1464
2320
except KeyError:
1467
2323
if client.approval_delay:
1468
2324
delay = client.approval_delay
1469
2325
client.approvals_pending += 1
1470
2326
approval_required = True
1473
2329
if not client.enabled:
1474
2330
logger.info("Client %s is disabled",
1476
2332
if self.server.use_dbus:
1477
2333
# Emit D-Bus signal
1478
2334
client.Rejected("Disabled")
1481
if client._approved or not client.approval_delay:
1482
#We are approved or approval is disabled
2337
if client.approved or not client.approval_delay:
2338
# We are approved or approval is disabled
1484
elif client._approved is None:
2340
elif client.approved is None:
1485
2341
logger.info("Client %s needs approval",
1487
2343
if self.server.use_dbus:
1488
2344
# Emit D-Bus signal
1489
2345
client.NeedApproval(
1490
client.approval_delay_milliseconds(),
1491
client.approved_by_default)
2346
client.approval_delay.total_seconds()
2347
* 1000, client.approved_by_default)
1493
2349
logger.warning("Client %s was not approved",
1520
2374
delay -= time2 - time
1523
while sent_size < len(client.secret):
1525
sent = session.send(client.secret[sent_size:])
1526
except gnutls.errors.GNUTLSError as error:
1527
logger.warning("gnutls send failed")
1529
logger.debug("Sent: %d, remaining: %d",
1530
sent, len(client.secret)
1531
- (sent_size + sent))
2377
session.send(client.secret)
2378
except gnutls.Error as error:
2379
logger.warning("gnutls send failed",
1534
2383
logger.info("Sending secret to %s", client.name)
1535
2384
# bump the timeout using extended_timeout
1536
client.checked_ok(client.extended_timeout)
2385
client.bump_timeout(client.extended_timeout)
1537
2386
if self.server.use_dbus:
1538
2387
# Emit D-Bus signal
1539
2388
client.GotSecret()
1542
2391
if approval_required:
1543
2392
client.approvals_pending -= 1
1546
except gnutls.errors.GNUTLSError as error:
1547
logger.warning("GnuTLS bye failed")
2395
except gnutls.Error as error:
2396
logger.warning("GnuTLS bye failed",
1550
2400
def peer_certificate(session):
1551
"Return the peer's OpenPGP certificate as a bytestring"
1552
# If not an OpenPGP certificate...
1553
if (gnutls.library.functions
1554
.gnutls_certificate_type_get(session._c_object)
1555
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1556
# ...do the normal thing
1557
return session.peer_certificate
2401
"Return the peer's certificate as a bytestring"
2403
cert_type = gnutls.certificate_type_get2(session._c_object,
2405
except AttributeError:
2406
cert_type = gnutls.certificate_type_get(session._c_object)
2407
if gnutls.has_rawpk:
2408
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2410
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2411
# If not a valid certificate type...
2412
if cert_type not in valid_cert_types:
2413
logger.info("Cert type %r not in %r", cert_type,
2415
# ...return invalid data
1558
2417
list_size = ctypes.c_uint(1)
1559
cert_list = (gnutls.library.functions
1560
.gnutls_certificate_get_peers
2418
cert_list = (gnutls.certificate_get_peers
1561
2419
(session._c_object, ctypes.byref(list_size)))
1562
2420
if not bool(cert_list) and list_size.value != 0:
1563
raise gnutls.errors.GNUTLSError("error getting peer"
2421
raise gnutls.Error("error getting peer certificate")
1565
2422
if list_size.value == 0:
1567
2424
cert = cert_list[0]
1568
2425
return ctypes.string_at(cert.data, cert.size)
2428
def key_id(certificate):
2429
"Convert a certificate bytestring to a hexdigit key ID"
2430
# New GnuTLS "datum" with the public key
2431
datum = gnutls.datum_t(
2432
ctypes.cast(ctypes.c_char_p(certificate),
2433
ctypes.POINTER(ctypes.c_ubyte)),
2434
ctypes.c_uint(len(certificate)))
2435
# XXX all these need to be created in the gnutls "module"
2436
# New empty GnuTLS certificate
2437
pubkey = gnutls.pubkey_t()
2438
gnutls.pubkey_init(ctypes.byref(pubkey))
2439
# Import the raw public key into the certificate
2440
gnutls.pubkey_import(pubkey,
2441
ctypes.byref(datum),
2442
gnutls.X509_FMT_DER)
2443
# New buffer for the key ID
2444
buf = ctypes.create_string_buffer(32)
2445
buf_len = ctypes.c_size_t(len(buf))
2446
# Get the key ID from the raw public key into the buffer
2447
gnutls.pubkey_get_key_id(pubkey,
2448
gnutls.KEYID_USE_SHA256,
2449
ctypes.cast(ctypes.byref(buf),
2450
ctypes.POINTER(ctypes.c_ubyte)),
2451
ctypes.byref(buf_len))
2452
# Deinit the certificate
2453
gnutls.pubkey_deinit(pubkey)
2455
# Convert the buffer to a Python bytestring
2456
key_id = ctypes.string_at(buf, buf_len.value)
2457
# Convert the bytestring to hexadecimal notation
2458
hex_key_id = binascii.hexlify(key_id).upper()
1571
2462
def fingerprint(openpgp):
1572
2463
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1573
2464
# New GnuTLS "datum" with the OpenPGP public key
1574
datum = (gnutls.library.types
1575
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1578
ctypes.c_uint(len(openpgp))))
2465
datum = gnutls.datum_t(
2466
ctypes.cast(ctypes.c_char_p(openpgp),
2467
ctypes.POINTER(ctypes.c_ubyte)),
2468
ctypes.c_uint(len(openpgp)))
1579
2469
# New empty GnuTLS certificate
1580
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1581
(gnutls.library.functions
1582
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2470
crt = gnutls.openpgp_crt_t()
2471
gnutls.openpgp_crt_init(ctypes.byref(crt))
1583
2472
# Import the OpenPGP public key into the certificate
1584
(gnutls.library.functions
1585
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1586
gnutls.library.constants
1587
.GNUTLS_OPENPGP_FMT_RAW))
2473
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2474
gnutls.OPENPGP_FMT_RAW)
1588
2475
# Verify the self signature in the key
1589
2476
crtverify = ctypes.c_uint()
1590
(gnutls.library.functions
1591
.gnutls_openpgp_crt_verify_self(crt, 0,
1592
ctypes.byref(crtverify)))
2477
gnutls.openpgp_crt_verify_self(crt, 0,
2478
ctypes.byref(crtverify))
1593
2479
if crtverify.value != 0:
1594
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1595
raise (gnutls.errors.CertificateSecurityError
2480
gnutls.openpgp_crt_deinit(crt)
2481
raise gnutls.CertificateSecurityError(code
1597
2483
# New buffer for the fingerprint
1598
2484
buf = ctypes.create_string_buffer(20)
1599
2485
buf_len = ctypes.c_size_t()
1600
2486
# Get the fingerprint from the certificate into the buffer
1601
(gnutls.library.functions
1602
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1603
ctypes.byref(buf_len)))
2487
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2488
ctypes.byref(buf_len))
1604
2489
# Deinit the certificate
1605
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2490
gnutls.openpgp_crt_deinit(crt)
1606
2491
# Convert the buffer to a Python bytestring
1607
2492
fpr = ctypes.string_at(buf, buf_len.value)
1608
2493
# Convert the bytestring to hexadecimal notation
1609
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2494
hex_fpr = binascii.hexlify(fpr).upper()
1613
class MultiprocessingMixIn(object):
2498
class MultiprocessingMixIn:
1614
2499
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1615
2501
def sub_process_main(self, request, address):
1617
2503
self.finish_request(request, address)
1619
2505
self.handle_error(request, address)
1620
2506
self.close_request(request)
1622
2508
def process_request(self, request, address):
1623
2509
"""Start a new process to process the request."""
1624
proc = multiprocessing.Process(target = self.sub_process_main,
2510
proc = multiprocessing.Process(target=self.sub_process_main,
2511
args=(request, address))
1631
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2516
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
1632
2517
""" adds a pipe to the MixIn """
1633
2519
def process_request(self, request, client_address):
1634
2520
"""Overrides and wraps the original process_request().
1636
2522
This function creates a new pipe in self.pipe
1638
2524
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1640
2526
proc = MultiprocessingMixIn.process_request(self, request,
1641
2527
client_address)
1642
2528
self.child_pipe.close()
1643
2529
self.add_pipe(parent_pipe, proc)
1645
2531
def add_pipe(self, parent_pipe, proc):
1646
2532
"""Dummy function; override as necessary"""
1647
raise NotImplementedError
2533
raise NotImplementedError()
1650
2536
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1651
socketserver.TCPServer, object):
2537
socketserver.TCPServer):
1652
2538
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1655
2541
enabled: Boolean; whether this server is activated yet
1656
2542
interface: None or a network interface name (string)
1657
2543
use_ipv6: Boolean; to use IPv6 or not
1659
2546
def __init__(self, server_address, RequestHandlerClass,
1660
interface=None, use_ipv6=True):
2550
"""If socketfd is set, use that file descriptor instead of
2551
creating a new one with socket.socket().
1661
2553
self.interface = interface
1663
2555
self.address_family = socket.AF_INET6
2556
if socketfd is not None:
2557
# Save the file descriptor
2558
self.socketfd = socketfd
2559
# Save the original socket.socket() function
2560
self.socket_socket = socket.socket
2562
# To implement --socket, we monkey patch socket.socket.
2564
# (When socketserver.TCPServer is a new-style class, we
2565
# could make self.socket into a property instead of monkey
2566
# patching socket.socket.)
2568
# Create a one-time-only replacement for socket.socket()
2569
@functools.wraps(socket.socket)
2570
def socket_wrapper(*args, **kwargs):
2571
# Restore original function so subsequent calls are
2573
socket.socket = self.socket_socket
2574
del self.socket_socket
2575
# This time only, return a new socket object from the
2576
# saved file descriptor.
2577
return socket.fromfd(self.socketfd, *args, **kwargs)
2578
# Replace socket.socket() function with wrapper
2579
socket.socket = socket_wrapper
2580
# The socketserver.TCPServer.__init__ will call
2581
# socket.socket(), which might be our replacement,
2582
# socket_wrapper(), if socketfd was set.
1664
2583
socketserver.TCPServer.__init__(self, server_address,
1665
2584
RequestHandlerClass)
1666
2586
def server_bind(self):
1667
2587
"""This overrides the normal server_bind() function
1668
2588
to bind to an interface if one was specified, and also NOT to
1669
2589
bind to an address or port if they were not specified."""
2590
global SO_BINDTODEVICE
1670
2591
if self.interface is not None:
1671
2592
if SO_BINDTODEVICE is None:
1672
logger.error("SO_BINDTODEVICE does not exist;"
1673
" cannot bind to interface %s",
1677
self.socket.setsockopt(socket.SOL_SOCKET,
1681
except socket.error as error:
1682
if error[0] == errno.EPERM:
1683
logger.error("No permission to"
1684
" bind to interface %s",
1686
elif error[0] == errno.ENOPROTOOPT:
1687
logger.error("SO_BINDTODEVICE not available;"
1688
" cannot bind to interface %s",
2593
# Fall back to a hard-coded value which seems to be
2595
logger.warning("SO_BINDTODEVICE not found, trying 25")
2596
SO_BINDTODEVICE = 25
2598
self.socket.setsockopt(
2599
socket.SOL_SOCKET, SO_BINDTODEVICE,
2600
(self.interface + "\0").encode("utf-8"))
2601
except socket.error as error:
2602
if error.errno == errno.EPERM:
2603
logger.error("No permission to bind to"
2604
" interface %s", self.interface)
2605
elif error.errno == errno.ENOPROTOOPT:
2606
logger.error("SO_BINDTODEVICE not available;"
2607
" cannot bind to interface %s",
2609
elif error.errno == errno.ENODEV:
2610
logger.error("Interface %s does not exist,"
2611
" cannot bind", self.interface)
1692
2614
# Only bind(2) the socket if we really need to.
1693
2615
if self.server_address[0] or self.server_address[1]:
2616
if self.server_address[1]:
2617
self.allow_reuse_address = True
1694
2618
if not self.server_address[0]:
1695
2619
if self.address_family == socket.AF_INET6:
1696
any_address = "::" # in6addr_any
2620
any_address = "::" # in6addr_any
1698
any_address = socket.INADDR_ANY
2622
any_address = "0.0.0.0" # INADDR_ANY
1699
2623
self.server_address = (any_address,
1700
2624
self.server_address[1])
1701
2625
elif not self.server_address[1]:
1702
self.server_address = (self.server_address[0],
2626
self.server_address = (self.server_address[0], 0)
1704
2627
# if self.interface:
1705
2628
# self.server_address = (self.server_address[0],
1927
2956
parser.add_argument("--no-dbus", action="store_false",
1928
2957
dest="use_dbus", help="Do not provide D-Bus"
1929
" system bus interface")
2958
" system bus interface", default=None)
1930
2959
parser.add_argument("--no-ipv6", action="store_false",
1931
dest="use_ipv6", help="Do not use IPv6")
2960
dest="use_ipv6", help="Do not use IPv6",
1932
2962
parser.add_argument("--no-restore", action="store_false",
1933
dest="restore", help="Do not restore stored state",
2963
dest="restore", help="Do not restore stored"
2964
" state", default=None)
2965
parser.add_argument("--socket", type=int,
2966
help="Specify a file descriptor to a network"
2967
" socket to use instead of creating one")
2968
parser.add_argument("--statedir", metavar="DIR",
2969
help="Directory to save/restore state in")
2970
parser.add_argument("--foreground", action="store_true",
2971
help="Run in foreground", default=None)
2972
parser.add_argument("--no-zeroconf", action="store_false",
2973
dest="zeroconf", help="Do not use Zeroconf",
1936
2976
options = parser.parse_args()
1938
2978
if options.check:
2980
fail_count, test_count = doctest.testmod()
2981
sys.exit(os.EX_OK if fail_count == 0 else 1)
1943
2983
# Default values for config file for server-global settings
1944
server_defaults = { "interface": "",
1949
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1950
"servicename": "Mandos",
2984
if gnutls.has_rawpk:
2985
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2986
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2988
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2989
":+SIGN-DSA-SHA256")
2990
server_defaults = {"interface": "",
2994
"priority": priority,
2995
"servicename": "Mandos",
3001
"statedir": "/var/lib/mandos",
3002
"foreground": "False",
1956
3007
# Parse config file for server-global settings
1957
server_config = configparser.SafeConfigParser(server_defaults)
3008
server_config = configparser.ConfigParser(server_defaults)
1958
3009
del server_defaults
1959
server_config.read(os.path.join(options.configdir,
1961
# Convert the SafeConfigParser object to a dict
3010
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3011
# Convert the ConfigParser object to a dict
1962
3012
server_settings = server_config.defaults()
1963
3013
# Use the appropriate methods on the non-string config options
1964
for option in ("debug", "use_dbus", "use_ipv6"):
3014
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3015
"foreground", "zeroconf"):
1965
3016
server_settings[option] = server_config.getboolean("DEFAULT",
1967
3018
if server_settings["port"]:
1968
3019
server_settings["port"] = server_config.getint("DEFAULT",
3021
if server_settings["socket"]:
3022
server_settings["socket"] = server_config.getint("DEFAULT",
3024
# Later, stdin will, and stdout and stderr might, be dup'ed
3025
# over with an opened os.devnull. But we don't want this to
3026
# happen with a supplied network socket.
3027
if 0 <= server_settings["socket"] <= 2:
3028
server_settings["socket"] = os.dup(server_settings
1970
3030
del server_config
1972
3032
# Override the settings from the config file with command line
1973
3033
# options, if set.
1974
3034
for option in ("interface", "address", "port", "debug",
1975
"priority", "servicename", "configdir",
1976
"use_dbus", "use_ipv6", "debuglevel", "restore"):
3035
"priority", "servicename", "configdir", "use_dbus",
3036
"use_ipv6", "debuglevel", "restore", "statedir",
3037
"socket", "foreground", "zeroconf"):
1977
3038
value = getattr(options, option)
1978
3039
if value is not None:
1979
3040
server_settings[option] = value
1981
3042
# Force all strings to be unicode
1982
3043
for option in server_settings.keys():
1983
if type(server_settings[option]) is str:
1984
server_settings[option] = unicode(server_settings[option])
3044
if isinstance(server_settings[option], bytes):
3045
server_settings[option] = (server_settings[option]
3047
# Force all boolean options to be boolean
3048
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3049
"foreground", "zeroconf"):
3050
server_settings[option] = bool(server_settings[option])
3051
# Debug implies foreground
3052
if server_settings["debug"]:
3053
server_settings["foreground"] = True
1985
3054
# Now we have our good server settings in "server_settings"
1987
3056
##################################################################
3058
if (not server_settings["zeroconf"]
3059
and not (server_settings["port"]
3060
or server_settings["socket"] != "")):
3061
parser.error("Needs port or socket to work without Zeroconf")
1989
3063
# For convenience
1990
3064
debug = server_settings["debug"]
1991
3065
debuglevel = server_settings["debuglevel"]
1992
3066
use_dbus = server_settings["use_dbus"]
1993
3067
use_ipv6 = server_settings["use_ipv6"]
3068
stored_state_path = os.path.join(server_settings["statedir"],
3070
foreground = server_settings["foreground"]
3071
zeroconf = server_settings["zeroconf"]
1996
initlogger(logging.DEBUG)
3074
initlogger(debug, logging.DEBUG)
1998
3076
if not debuglevel:
2001
3079
level = getattr(logging, debuglevel.upper())
3080
initlogger(debug, level)
2004
3082
if server_settings["servicename"] != "Mandos":
2005
syslogger.setFormatter(logging.Formatter
2006
('Mandos (%s) [%%(process)d]:'
2007
' %%(levelname)s: %%(message)s'
2008
% server_settings["servicename"]))
3083
syslogger.setFormatter(
3084
logging.Formatter('Mandos ({}) [%(process)d]:'
3085
' %(levelname)s: %(message)s'.format(
3086
server_settings["servicename"])))
2010
3088
# Parse config file with clients
2011
client_defaults = { "timeout": "5m",
2012
"extended_timeout": "15m",
2014
"checker": "fping -q -- %%(host)s",
2016
"approval_delay": "0s",
2017
"approval_duration": "1s",
2019
client_config = configparser.SafeConfigParser(client_defaults)
3089
client_config = configparser.ConfigParser(Client.client_defaults)
2020
3090
client_config.read(os.path.join(server_settings["configdir"],
2021
3091
"clients.conf"))
2023
3093
global mandos_dbus_service
2024
3094
mandos_dbus_service = None
2026
tcp_server = MandosServer((server_settings["address"],
2027
server_settings["port"]),
2029
interface=(server_settings["interface"]
2033
server_settings["priority"],
2036
pidfilename = "/var/run/mandos.pid"
2038
pidfile = open(pidfilename, "w")
2040
logger.error("Could not open file %r", pidfilename)
2043
uid = pwd.getpwnam("_mandos").pw_uid
2044
gid = pwd.getpwnam("_mandos").pw_gid
2047
uid = pwd.getpwnam("mandos").pw_uid
2048
gid = pwd.getpwnam("mandos").pw_gid
3097
if server_settings["socket"] != "":
3098
socketfd = server_settings["socket"]
3099
tcp_server = MandosServer(
3100
(server_settings["address"], server_settings["port"]),
3102
interface=(server_settings["interface"] or None),
3104
gnutls_priority=server_settings["priority"],
3108
pidfilename = "/run/mandos.pid"
3109
if not os.path.isdir("/run/."):
3110
pidfilename = "/var/run/mandos.pid"
3113
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3114
except IOError as e:
3115
logger.error("Could not open file %r", pidfilename,
3118
for name, group in (("_mandos", "_mandos"),
3119
("mandos", "mandos"),
3120
("nobody", "nogroup")):
3122
uid = pwd.getpwnam(name).pw_uid
3123
gid = pwd.getpwnam(group).pw_gid
2049
3125
except KeyError:
2051
uid = pwd.getpwnam("nobody").pw_uid
2052
gid = pwd.getpwnam("nobody").pw_gid
3134
logger.debug("Did setuid/setgid to {}:{}".format(uid,
2059
3136
except OSError as error:
2060
if error[0] != errno.EPERM:
3137
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3138
.format(uid, gid, os.strerror(error.errno)))
3139
if error.errno != errno.EPERM:
2064
3143
# Enable all possible GnuTLS debugging
2066
3145
# "Use a log level over 10 to enable all debugging options."
2067
3146
# - GnuTLS manual
2068
gnutls.library.functions.gnutls_global_set_log_level(11)
2070
@gnutls.library.types.gnutls_log_func
3147
gnutls.global_set_log_level(11)
2071
3150
def debug_gnutls(level, string):
2072
3151
logger.debug("GnuTLS: %s", string[:-1])
2074
(gnutls.library.functions
2075
.gnutls_global_set_log_function(debug_gnutls))
3153
gnutls.global_set_log_function(debug_gnutls)
2077
3155
# Redirect stdin so all checkers get /dev/null
2078
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3156
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2079
3157
os.dup2(null, sys.stdin.fileno())
2083
# No console logging
2084
logger.removeHandler(console)
2086
3161
# Need to fork before connecting to D-Bus
2088
3163
# Close all input and output, do double fork, etc.
3166
if gi.version_info < (3, 10, 2):
3167
# multiprocessing will use threads, so before we use GLib we
3168
# need to inform GLib that threads will be used.
2091
3171
global main_loop
2092
3172
# From the Avahi example code
2093
DBusGMainLoop(set_as_default=True )
2094
main_loop = gobject.MainLoop()
3173
DBusGMainLoop(set_as_default=True)
3174
main_loop = GLib.MainLoop()
2095
3175
bus = dbus.SystemBus()
2096
3176
# End of Avahi example code
2099
3179
bus_name = dbus.service.BusName("se.recompile.Mandos",
2100
bus, do_not_queue=True)
2101
old_bus_name = (dbus.service.BusName
2102
("se.bsnet.fukt.Mandos", bus,
2104
except dbus.exceptions.NameExistsException as e:
2105
logger.error(unicode(e) + ", disabling D-Bus")
3182
old_bus_name = dbus.service.BusName(
3183
"se.bsnet.fukt.Mandos", bus,
3185
except dbus.exceptions.DBusException as e:
3186
logger.error("Disabling D-Bus:", exc_info=e)
2106
3187
use_dbus = False
2107
3188
server_settings["use_dbus"] = False
2108
3189
tcp_server.use_dbus = False
2109
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2110
service = AvahiServiceToSyslog(name =
2111
server_settings["servicename"],
2112
servicetype = "_mandos._tcp",
2113
protocol = protocol, bus = bus)
2114
if server_settings["interface"]:
2115
service.interface = (if_nametoindex
2116
(str(server_settings["interface"])))
3191
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3192
service = AvahiServiceToSyslog(
3193
name=server_settings["servicename"],
3194
servicetype="_mandos._tcp",
3197
if server_settings["interface"]:
3198
service.interface = if_nametoindex(
3199
server_settings["interface"].encode("utf-8"))
2118
3201
global multiprocessing_manager
2119
3202
multiprocessing_manager = multiprocessing.Manager()
2121
3204
client_class = Client
2123
client_class = functools.partial(ClientDBusTransitional,
2126
special_settings = {
2127
# Some settings need to be accessd by special methods;
2128
# booleans need .getboolean(), etc. Here is a list of them:
2129
"approved_by_default":
2131
client_config.getboolean(section, "approved_by_default"),
2133
# Construct a new dict of client settings of this form:
2134
# { client_name: {setting_name: value, ...}, ...}
2135
# with exceptions for any special settings as defined above
2136
client_settings = dict((clientname,
2138
(value if setting not in special_settings
2139
else special_settings[setting](clientname)))
2140
for setting, value in client_config.items(clientname)))
2141
for clientname in client_config.sections())
3206
client_class = functools.partial(ClientDBus, bus=bus)
3208
client_settings = Client.config_parser(client_config)
2143
3209
old_client_settings = {}
2146
# Get client data and settings from last running state.
3212
# This is used to redirect stdout and stderr for checker processes
3214
wnull = open(os.devnull, "w") # A writable /dev/null
3215
# Only used if server is running in foreground but not in debug
3217
if debug or not foreground:
3220
# Get client data and settings from last running state.
2147
3221
if server_settings["restore"]:
2149
3223
with open(stored_state_path, "rb") as stored_state:
2150
clients_data, old_client_settings = pickle.load(stored_state)
3224
if sys.version_info.major == 2:
3225
clients_data, old_client_settings = pickle.load(
3228
bytes_clients_data, bytes_old_client_settings = (
3229
pickle.load(stored_state, encoding="bytes"))
3230
# Fix bytes to strings
3233
clients_data = {(key.decode("utf-8")
3234
if isinstance(key, bytes)
3237
bytes_clients_data.items()}
3238
del bytes_clients_data
3239
for key in clients_data:
3240
value = {(k.decode("utf-8")
3241
if isinstance(k, bytes) else k): v
3243
clients_data[key].items()}
3244
clients_data[key] = value
3246
value["client_structure"] = [
3248
if isinstance(s, bytes)
3250
value["client_structure"]]
3252
for k in ("name", "host"):
3253
if isinstance(value[k], bytes):
3254
value[k] = value[k].decode("utf-8")
3255
if "key_id" not in value:
3256
value["key_id"] = ""
3257
elif "fingerprint" not in value:
3258
value["fingerprint"] = ""
3259
# old_client_settings
3261
old_client_settings = {
3262
(key.decode("utf-8")
3263
if isinstance(key, bytes)
3266
bytes_old_client_settings.items()}
3267
del bytes_old_client_settings
3269
for value in old_client_settings.values():
3270
if isinstance(value["host"], bytes):
3271
value["host"] = (value["host"]
2151
3273
os.remove(stored_state_path)
2152
3274
except IOError as e:
2153
logger.warning("Could not load persistant state: {0}".format(e))
2154
if e.errno != errno.ENOENT:
3275
if e.errno == errno.ENOENT:
3276
logger.warning("Could not load persistent state:"
3277
" {}".format(os.strerror(e.errno)))
3279
logger.critical("Could not load persistent state:",
2157
for client in clients_data:
2158
client_name = client["name"]
2160
# Decide which value to use after restoring saved state.
2161
# We have three different values: Old config file,
2162
# new config file, and saved state.
2163
# New config value takes precedence if it differs from old
2164
# config value, otherwise use saved state.
2165
for name, value in client_settings[client_name].items():
3282
except EOFError as e:
3283
logger.warning("Could not load persistent state: "
3287
with PGPEngine() as pgp:
3288
for client_name, client in clients_data.items():
3289
# Skip removed clients
3290
if client_name not in client_settings:
3293
# Decide which value to use after restoring saved state.
3294
# We have three different values: Old config file,
3295
# new config file, and saved state.
3296
# New config value takes precedence if it differs from old
3297
# config value, otherwise use saved state.
3298
for name, value in client_settings[client_name].items():
3300
# For each value in new config, check if it
3301
# differs from the old config value (Except for
3302
# the "secret" attribute)
3303
if (name != "secret"
3305
old_client_settings[client_name][name])):
3306
client[name] = value
3310
# Clients who has passed its expire date can still be
3311
# enabled if its last checker was successful. A Client
3312
# whose checker succeeded before we stored its state is
3313
# assumed to have successfully run all checkers during
3315
if client["enabled"]:
3316
if datetime.datetime.utcnow() >= client["expires"]:
3317
if not client["last_checked_ok"]:
3319
"disabling client {} - Client never "
3320
"performed a successful checker".format(
3322
client["enabled"] = False
3323
elif client["last_checker_status"] != 0:
3325
"disabling client {} - Client last"
3326
" checker failed with error code"
3329
client["last_checker_status"]))
3330
client["enabled"] = False
3332
client["expires"] = (
3333
datetime.datetime.utcnow()
3334
+ client["timeout"])
3335
logger.debug("Last checker succeeded,"
3336
" keeping {} enabled".format(
2167
# For each value in new config, check if it differs
2168
# from the old config value (Except for the "secret"
2170
if name != "secret" and value != old_client_settings[client_name][name]:
2171
setattr(client, name, value)
2175
# Clients who has passed its expire date, can still be enabled if its
2176
# last checker was sucessful. Clients who checkers failed before we
2177
# stored it state is asumed to had failed checker during downtime.
2178
if client["enabled"] and client["last_checked_ok"]:
2179
if ((datetime.datetime.utcnow() - client["last_checked_ok"])
2180
> client["interval"]):
2181
if client["last_checker_status"] != 0:
2182
client["enabled"] = False
2184
client["expires"] = datetime.datetime.utcnow() + client["timeout"]
2186
client["changedstate"] = (multiprocessing_manager
2187
.Condition(multiprocessing_manager
2190
new_client = ClientDBusTransitional.__new__(ClientDBusTransitional)
2191
tcp_server.clients[client_name] = new_client
2192
new_client.bus = bus
2193
for name, value in client.iteritems():
2194
setattr(new_client, name, value)
2195
client_object_name = unicode(client_name).translate(
2196
{ord("."): ord("_"),
2197
ord("-"): ord("_")})
2198
new_client.dbus_object_path = (dbus.ObjectPath
2199
("/clients/" + client_object_name))
2200
DBusObjectWithProperties.__init__(new_client,
2202
new_client.dbus_object_path)
2204
tcp_server.clients[client_name] = Client.__new__(Client)
2205
for name, value in client.iteritems():
2206
setattr(tcp_server.clients[client_name], name, value)
2208
tcp_server.clients[client_name].decrypt_secret(
2209
client_settings[client_name]["secret"])
2211
# Create/remove clients based on new changes made to config
2212
for clientname in set(old_client_settings) - set(client_settings):
2213
del tcp_server.clients[clientname]
2214
for clientname in set(client_settings) - set(old_client_settings):
2215
tcp_server.clients[clientname] = (client_class(name = clientname,
3339
client["secret"] = pgp.decrypt(
3340
client["encrypted_secret"],
3341
client_settings[client_name]["secret"])
3343
# If decryption fails, we use secret from new settings
3344
logger.debug("Failed to decrypt {} old secret".format(
3346
client["secret"] = (client_settings[client_name]
3349
# Add/remove clients based on new changes made to config
3350
for client_name in (set(old_client_settings)
3351
- set(client_settings)):
3352
del clients_data[client_name]
3353
for client_name in (set(client_settings)
3354
- set(old_client_settings)):
3355
clients_data[client_name] = client_settings[client_name]
3357
# Create all client objects
3358
for client_name, client in clients_data.items():
3359
tcp_server.clients[client_name] = client_class(
3362
server_settings=server_settings)
2221
3364
if not tcp_server.clients:
2222
3365
logger.warning("No clients defined")
2228
pidfile.write(str(pid) + "\n".encode("utf-8"))
2231
logger.error("Could not write to file %r with PID %d",
2234
# "pidfile" was never created
3368
if pidfile is not None:
3372
print(pid, file=pidfile)
3374
logger.error("Could not write to file %r with PID %d",
2236
3377
del pidfilename
2238
signal.signal(signal.SIGINT, signal.SIG_IGN)
2240
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2241
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3379
for termsig in (signal.SIGHUP, signal.SIGTERM):
3380
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3381
lambda: main_loop.quit() and False)
2244
class MandosDBusService(dbus.service.Object):
3385
@alternate_dbus_interfaces(
3386
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3387
class MandosDBusService(DBusObjectWithObjectManager):
2245
3388
"""A D-Bus proxy object"""
2246
3390
def __init__(self):
2247
3391
dbus.service.Object.__init__(self, bus, "/")
2248
3393
_interface = "se.recompile.Mandos"
2250
3395
@dbus.service.signal(_interface, signature="o")
2251
3396
def ClientAdded(self, objpath):
2255
3400
@dbus.service.signal(_interface, signature="ss")
2256
def ClientNotFound(self, fingerprint, address):
3401
def ClientNotFound(self, key_id, address):
3405
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2260
3407
@dbus.service.signal(_interface, signature="os")
2261
3408
def ClientRemoved(self, objpath, name):
3412
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2265
3414
@dbus.service.method(_interface, out_signature="ao")
2266
3415
def GetAllClients(self):
2268
return dbus.Array(c.dbus_object_path
2270
tcp_server.clients.itervalues())
3417
return dbus.Array(c.dbus_object_path for c in
3418
tcp_server.clients.values())
3420
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2272
3422
@dbus.service.method(_interface,
2273
3423
out_signature="a{oa{sv}}")
2274
3424
def GetAllClientsWithProperties(self):
2276
3426
return dbus.Dictionary(
2277
((c.dbus_object_path, c.GetAll(""))
2278
for c in tcp_server.clients.itervalues()),
3427
{c.dbus_object_path: c.GetAll(
3428
"se.recompile.Mandos.Client")
3429
for c in tcp_server.clients.values()},
2279
3430
signature="oa{sv}")
2281
3432
@dbus.service.method(_interface, in_signature="o")
2282
3433
def RemoveClient(self, object_path):
2284
for c in tcp_server.clients.itervalues():
3435
for c in tcp_server.clients.values():
2285
3436
if c.dbus_object_path == object_path:
2286
3437
del tcp_server.clients[c.name]
2287
3438
c.remove_from_connection()
2288
# Don't signal anything except ClientRemoved
3439
# Don't signal the disabling
2289
3440
c.disable(quiet=True)
2291
self.ClientRemoved(object_path, c.name)
3441
# Emit D-Bus signal for removal
3442
self.client_removed_signal(c)
2293
3444
raise KeyError(object_path)
2297
class MandosDBusServiceTransitional(MandosDBusService):
2298
__metaclass__ = AlternateDBusNamesMetaclass
2299
mandos_dbus_service = MandosDBusServiceTransitional()
3448
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3449
out_signature="a{oa{sa{sv}}}")
3450
def GetManagedObjects(self):
3452
return dbus.Dictionary(
3453
{client.dbus_object_path:
3455
{interface: client.GetAll(interface)
3457
client._get_all_interface_names()})
3458
for client in tcp_server.clients.values()})
3460
def client_added_signal(self, client):
3461
"""Send the new standard signal and the old signal"""
3463
# New standard signal
3464
self.InterfacesAdded(
3465
client.dbus_object_path,
3467
{interface: client.GetAll(interface)
3469
client._get_all_interface_names()}))
3471
self.ClientAdded(client.dbus_object_path)
3473
def client_removed_signal(self, client):
3474
"""Send the new standard signal and the old signal"""
3476
# New standard signal
3477
self.InterfacesRemoved(
3478
client.dbus_object_path,
3479
client._get_all_interface_names())
3481
self.ClientRemoved(client.dbus_object_path,
3484
mandos_dbus_service = MandosDBusService()
3486
# Save modules to variables to exempt the modules from being
3487
# unloaded before the function registered with atexit() is run.
3488
mp = multiprocessing
2302
3492
"Cleanup function; run on exit"
2305
multiprocessing.active_children()
3496
mp.active_children()
2306
3498
if not (tcp_server.clients or client_settings):
2309
# Store client before exiting. Secrets are encrypted with key based
2310
# on what config file has. If config file is removed/edited, old
2311
# secret will thus be unrecovable.
2313
for client in tcp_server.clients.itervalues():
2314
client.encrypt_secret(client_settings[client.name]["secret"])
2318
# A list of attributes that will not be stored when shuting down.
2319
exclude = set(("bus", "changedstate", "secret"))
2320
for name, typ in inspect.getmembers(dbus.service.Object):
2323
client_dict["encrypted_secret"] = client.encrypted_secret
2324
for attr in client.client_structure:
2325
if attr not in exclude:
2326
client_dict[attr] = getattr(client, attr)
2328
clients.append(client_dict)
2329
del client_settings[client.name]["secret"]
3501
# Store client before exiting. Secrets are encrypted with key
3502
# based on what config file has. If config file is
3503
# removed/edited, old secret will thus be unrecovable.
3505
with PGPEngine() as pgp:
3506
for client in tcp_server.clients.values():
3507
key = client_settings[client.name]["secret"]
3508
client.encrypted_secret = pgp.encrypt(client.secret,
3512
# A list of attributes that can not be pickled
3514
exclude = {"bus", "changedstate", "secret",
3515
"checker", "server_settings"}
3516
for name, typ in inspect.getmembers(dbus.service
3520
client_dict["encrypted_secret"] = (client
3522
for attr in client.client_structure:
3523
if attr not in exclude:
3524
client_dict[attr] = getattr(client, attr)
3526
clients[client.name] = client_dict
3527
del client_settings[client.name]["secret"]
2332
with os.fdopen(os.open(stored_state_path, os.O_CREAT|os.O_WRONLY|os.O_TRUNC, 0600), "wb") as stored_state:
2333
pickle.dump((clients, client_settings), stored_state)
2334
except IOError as e:
2335
logger.warning("Could not save persistant state: {0}".format(e))
2336
if e.errno != errno.ENOENT:
3530
with tempfile.NamedTemporaryFile(
3534
dir=os.path.dirname(stored_state_path),
3535
delete=False) as stored_state:
3536
pickle.dump((clients, client_settings), stored_state,
3538
tempname = stored_state.name
3539
os.rename(tempname, stored_state_path)
3540
except (IOError, OSError) as e:
3546
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3547
logger.warning("Could not save persistent state: {}"
3548
.format(os.strerror(e.errno)))
3550
logger.warning("Could not save persistent state:",
2339
3554
# Delete all clients, and settings from config