63
import cPickle as pickle
70
import cPickle as pickle
64
73
import multiprocessing
69
82
import dbus.service
83
from gi.repository import GLib
72
84
from dbus.mainloop.glib import DBusGMainLoop
75
87
import xml.dom.minidom
77
import Crypto.Cipher.AES
90
# Try to find the value of SO_BINDTODEVICE:
92
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
93
# newer, and it is also the most natural place for it:
80
94
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
81
95
except AttributeError:
97
# This is where SO_BINDTODEVICE was up to and including Python
83
99
from IN import SO_BINDTODEVICE
84
100
except ImportError:
85
SO_BINDTODEVICE = None
89
stored_state_path = "/var/lib/mandos/clients.pickle"
101
# In Python 2.7 it seems to have been removed entirely.
102
# Try running the C preprocessor:
104
cc = subprocess.Popen(["cc", "--language=c", "-E",
106
stdin=subprocess.PIPE,
107
stdout=subprocess.PIPE)
108
stdout = cc.communicate(
109
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
110
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
111
except (OSError, ValueError, IndexError):
113
SO_BINDTODEVICE = None
115
if sys.version_info.major == 2:
119
stored_state_file = "clients.pickle"
91
121
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"))
125
if_nametoindex = ctypes.cdll.LoadLibrary(
126
ctypes.util.find_library("c")).if_nametoindex
100
127
except (OSError, AttributeError):
101
129
def if_nametoindex(interface):
102
130
"Get an interface index the hard way, i.e. using fcntl()"
103
131
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
132
with contextlib.closing(socket.socket()) as s:
105
133
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
108
interface_index = struct.unpack(str("I"),
134
struct.pack(b"16s16x", interface))
135
interface_index = struct.unpack("I", ifreq[16:20])[0]
110
136
return interface_index
113
def initlogger(level=logging.WARNING):
139
def copy_function(func):
140
"""Make a copy of a function"""
141
if sys.version_info.major == 2:
142
return types.FunctionType(func.func_code,
148
return types.FunctionType(func.__code__,
155
def initlogger(debug, level=logging.WARNING):
114
156
"""init logger and add loglevel"""
159
syslogger = (logging.handlers.SysLogHandler(
160
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
116
162
syslogger.setFormatter(logging.Formatter
117
163
('Mandos [%(process)d]: %(levelname)s:'
119
165
logger.addHandler(syslogger)
121
console = logging.StreamHandler()
122
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
126
logger.addHandler(console)
168
console = logging.StreamHandler()
169
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
173
logger.addHandler(console)
127
174
logger.setLevel(level)
177
class PGPError(Exception):
178
"""Exception if encryption/decryption fails"""
182
class PGPEngine(object):
183
"""A simple class for OpenPGP symmetric encryption & decryption"""
186
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
189
output = subprocess.check_output(["gpgconf"])
190
for line in output.splitlines():
191
name, text, path = line.split(b":")
196
if e.errno != errno.ENOENT:
198
self.gnupgargs = ['--batch',
199
'--homedir', self.tempdir,
202
# Only GPG version 1 has the --no-use-agent option.
203
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
204
self.gnupgargs.append("--no-use-agent")
209
def __exit__(self, exc_type, exc_value, traceback):
217
if self.tempdir is not None:
218
# Delete contents of tempdir
219
for root, dirs, files in os.walk(self.tempdir,
221
for filename in files:
222
os.remove(os.path.join(root, filename))
224
os.rmdir(os.path.join(root, dirname))
226
os.rmdir(self.tempdir)
229
def password_encode(self, password):
230
# Passphrase can not be empty and can not contain newlines or
231
# NUL bytes. So we prefix it and hex encode it.
232
encoded = b"mandos" + binascii.hexlify(password)
233
if len(encoded) > 2048:
234
# GnuPG can't handle long passwords, so encode differently
235
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
236
.replace(b"\n", b"\\n")
237
.replace(b"\0", b"\\x00"))
240
def encrypt(self, data, password):
241
passphrase = self.password_encode(password)
242
with tempfile.NamedTemporaryFile(
243
dir=self.tempdir) as passfile:
244
passfile.write(passphrase)
246
proc = subprocess.Popen([self.gpg, '--symmetric',
250
stdin=subprocess.PIPE,
251
stdout=subprocess.PIPE,
252
stderr=subprocess.PIPE)
253
ciphertext, err = proc.communicate(input=data)
254
if proc.returncode != 0:
258
def decrypt(self, data, password):
259
passphrase = self.password_encode(password)
260
with tempfile.NamedTemporaryFile(
261
dir=self.tempdir) as passfile:
262
passfile.write(passphrase)
264
proc = subprocess.Popen([self.gpg, '--decrypt',
268
stdin=subprocess.PIPE,
269
stdout=subprocess.PIPE,
270
stderr=subprocess.PIPE)
271
decrypted_plaintext, err = proc.communicate(input=data)
272
if proc.returncode != 0:
274
return decrypted_plaintext
277
# Pretend that we have an Avahi module
279
"""This isn't so much a class as it is a module-like namespace.
280
It is instantiated once, and simulates having an Avahi module."""
281
IF_UNSPEC = -1 # avahi-common/address.h
282
PROTO_UNSPEC = -1 # avahi-common/address.h
283
PROTO_INET = 0 # avahi-common/address.h
284
PROTO_INET6 = 1 # avahi-common/address.h
285
DBUS_NAME = "org.freedesktop.Avahi"
286
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
287
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
288
DBUS_PATH_SERVER = "/"
290
def string_array_to_txt_array(self, t):
291
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
292
for s in t), signature="ay")
293
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
294
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
295
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
296
SERVER_INVALID = 0 # avahi-common/defs.h
297
SERVER_REGISTERING = 1 # avahi-common/defs.h
298
SERVER_RUNNING = 2 # avahi-common/defs.h
299
SERVER_COLLISION = 3 # avahi-common/defs.h
300
SERVER_FAILURE = 4 # avahi-common/defs.h
130
304
class AvahiError(Exception):
131
305
def __init__(self, value, *args, **kwargs):
132
306
self.value = value
133
super(AvahiError, self).__init__(value, *args, **kwargs)
134
def __unicode__(self):
135
return unicode(repr(self.value))
307
return super(AvahiError, self).__init__(value, *args,
137
311
class AvahiServiceError(AvahiError):
140
315
class AvahiGroupError(AvahiError):
144
319
class AvahiService(object):
145
320
"""An Avahi (Zeroconf) service.
148
323
interface: integer; avahi.IF_UNSPEC or an interface index.
149
324
Used to optionally bind to the specified interface.
150
325
name: string; Example: 'Mandos'
151
326
type: string; Example: '_mandos._tcp'.
152
See <http://www.dns-sd.org/ServiceTypes.html>
327
See <https://www.iana.org/assignments/service-names-port-numbers>
153
328
port: integer; what port to announce
154
329
TXT: list of strings; TXT record for the service
155
330
domain: string; Domain to publish on, default to .local if empty.
284
489
follow_name_owner_changes=True),
285
490
avahi.DBUS_INTERFACE_SERVER)
286
491
self.server.connect_to_signal("StateChanged",
287
self.server_state_changed)
492
self.server_state_changed)
288
493
self.server_state_changed(self.server.GetState())
290
496
class AvahiServiceToSyslog(AvahiService):
497
def rename(self, *args, **kwargs):
292
498
"""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'
499
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
500
syslogger.setFormatter(logging.Formatter(
501
'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))
506
# Pretend that we have a GnuTLS module
507
class GnuTLS(object):
508
"""This isn't so much a class as it is a module-like namespace.
509
It is instantiated once, and simulates having a GnuTLS module."""
511
library = ctypes.util.find_library("gnutls")
513
library = ctypes.util.find_library("gnutls-deb0")
514
_library = ctypes.cdll.LoadLibrary(library)
516
_need_version = b"3.3.0"
517
_tls_rawpk_version = b"3.6.6"
520
# Need to use "self" here, since this method is called before
521
# the assignment to the "gnutls" global variable happens.
522
if self.check_version(self._need_version) is None:
523
raise self.Error("Needs GnuTLS {} or later"
524
.format(self._need_version))
526
# Unless otherwise indicated, the constants and types below are
527
# all from the gnutls/gnutls.h C header file.
538
E_NO_CERTIFICATE_FOUND = -49
543
KEYID_USE_SHA256 = 1 # gnutls/x509.h
544
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
547
class session_int(ctypes.Structure):
549
session_t = ctypes.POINTER(session_int)
551
class certificate_credentials_st(ctypes.Structure):
553
certificate_credentials_t = ctypes.POINTER(
554
certificate_credentials_st)
555
certificate_type_t = ctypes.c_int
557
class datum_t(ctypes.Structure):
558
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
559
('size', ctypes.c_uint)]
561
class openpgp_crt_int(ctypes.Structure):
563
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
564
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
565
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
566
credentials_type_t = ctypes.c_int
567
transport_ptr_t = ctypes.c_void_p
568
close_request_t = ctypes.c_int
571
class Error(Exception):
572
# We need to use the class name "GnuTLS" here, since this
573
# exception might be raised from within GnuTLS.__init__,
574
# which is called before the assignment to the "gnutls"
575
# global variable has happened.
576
def __init__(self, message=None, code=None, args=()):
577
# Default usage is by a message string, but if a return
578
# code is passed, convert it to a string with
581
if message is None and code is not None:
582
message = GnuTLS.strerror(code)
583
return super(GnuTLS.Error, self).__init__(
586
class CertificateSecurityError(Error):
590
class Credentials(object):
592
self._c_object = gnutls.certificate_credentials_t()
593
gnutls.certificate_allocate_credentials(
594
ctypes.byref(self._c_object))
595
self.type = gnutls.CRD_CERTIFICATE
598
gnutls.certificate_free_credentials(self._c_object)
600
class ClientSession(object):
601
def __init__(self, socket, credentials=None):
602
self._c_object = gnutls.session_t()
603
gnutls_flags = gnutls.CLIENT
604
if gnutls.check_version("3.5.6"):
605
gnutls_flags |= gnutls.NO_TICKETS
607
gnutls_flags |= gnutls.ENABLE_RAWPK
608
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
610
gnutls.set_default_priority(self._c_object)
611
gnutls.transport_set_ptr(self._c_object, socket.fileno())
612
gnutls.handshake_set_private_extensions(self._c_object,
615
if credentials is None:
616
credentials = gnutls.Credentials()
617
gnutls.credentials_set(self._c_object, credentials.type,
618
ctypes.cast(credentials._c_object,
620
self.credentials = credentials
623
gnutls.deinit(self._c_object)
626
return gnutls.handshake(self._c_object)
628
def send(self, data):
632
data_len -= gnutls.record_send(self._c_object,
637
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
639
# Error handling functions
640
def _error_code(result):
641
"""A function to raise exceptions on errors, suitable
642
for the 'restype' attribute on ctypes functions"""
645
if result == gnutls.E_NO_CERTIFICATE_FOUND:
646
raise gnutls.CertificateSecurityError(code=result)
647
raise gnutls.Error(code=result)
649
def _retry_on_error(result, func, arguments):
650
"""A function to retry on some errors, suitable
651
for the 'errcheck' attribute on ctypes functions"""
653
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
654
return _error_code(result)
655
result = func(*arguments)
658
# Unless otherwise indicated, the function declarations below are
659
# all from the gnutls/gnutls.h C header file.
662
priority_set_direct = _library.gnutls_priority_set_direct
663
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
664
ctypes.POINTER(ctypes.c_char_p)]
665
priority_set_direct.restype = _error_code
667
init = _library.gnutls_init
668
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
669
init.restype = _error_code
671
set_default_priority = _library.gnutls_set_default_priority
672
set_default_priority.argtypes = [session_t]
673
set_default_priority.restype = _error_code
675
record_send = _library.gnutls_record_send
676
record_send.argtypes = [session_t, ctypes.c_void_p,
678
record_send.restype = ctypes.c_ssize_t
679
record_send.errcheck = _retry_on_error
681
certificate_allocate_credentials = (
682
_library.gnutls_certificate_allocate_credentials)
683
certificate_allocate_credentials.argtypes = [
684
ctypes.POINTER(certificate_credentials_t)]
685
certificate_allocate_credentials.restype = _error_code
687
certificate_free_credentials = (
688
_library.gnutls_certificate_free_credentials)
689
certificate_free_credentials.argtypes = [
690
certificate_credentials_t]
691
certificate_free_credentials.restype = None
693
handshake_set_private_extensions = (
694
_library.gnutls_handshake_set_private_extensions)
695
handshake_set_private_extensions.argtypes = [session_t,
697
handshake_set_private_extensions.restype = None
699
credentials_set = _library.gnutls_credentials_set
700
credentials_set.argtypes = [session_t, credentials_type_t,
702
credentials_set.restype = _error_code
704
strerror = _library.gnutls_strerror
705
strerror.argtypes = [ctypes.c_int]
706
strerror.restype = ctypes.c_char_p
708
certificate_type_get = _library.gnutls_certificate_type_get
709
certificate_type_get.argtypes = [session_t]
710
certificate_type_get.restype = _error_code
712
certificate_get_peers = _library.gnutls_certificate_get_peers
713
certificate_get_peers.argtypes = [session_t,
714
ctypes.POINTER(ctypes.c_uint)]
715
certificate_get_peers.restype = ctypes.POINTER(datum_t)
717
global_set_log_level = _library.gnutls_global_set_log_level
718
global_set_log_level.argtypes = [ctypes.c_int]
719
global_set_log_level.restype = None
721
global_set_log_function = _library.gnutls_global_set_log_function
722
global_set_log_function.argtypes = [log_func]
723
global_set_log_function.restype = None
725
deinit = _library.gnutls_deinit
726
deinit.argtypes = [session_t]
727
deinit.restype = None
729
handshake = _library.gnutls_handshake
730
handshake.argtypes = [session_t]
731
handshake.restype = _error_code
732
handshake.errcheck = _retry_on_error
734
transport_set_ptr = _library.gnutls_transport_set_ptr
735
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
736
transport_set_ptr.restype = None
738
bye = _library.gnutls_bye
739
bye.argtypes = [session_t, close_request_t]
740
bye.restype = _error_code
741
bye.errcheck = _retry_on_error
743
check_version = _library.gnutls_check_version
744
check_version.argtypes = [ctypes.c_char_p]
745
check_version.restype = ctypes.c_char_p
747
has_rawpk = bool(check_version(_tls_rawpk_version))
751
class pubkey_st(ctypes.Structure):
753
pubkey_t = ctypes.POINTER(pubkey_st)
755
x509_crt_fmt_t = ctypes.c_int
757
# All the function declarations below are from gnutls/abstract.h
758
pubkey_init = _library.gnutls_pubkey_init
759
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
760
pubkey_init.restype = _error_code
762
pubkey_import = _library.gnutls_pubkey_import
763
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
765
pubkey_import.restype = _error_code
767
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
768
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
769
ctypes.POINTER(ctypes.c_ubyte),
770
ctypes.POINTER(ctypes.c_size_t)]
771
pubkey_get_key_id.restype = _error_code
773
pubkey_deinit = _library.gnutls_pubkey_deinit
774
pubkey_deinit.argtypes = [pubkey_t]
775
pubkey_deinit.restype = None
777
# All the function declarations below are from gnutls/openpgp.h
779
openpgp_crt_init = _library.gnutls_openpgp_crt_init
780
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
781
openpgp_crt_init.restype = _error_code
783
openpgp_crt_import = _library.gnutls_openpgp_crt_import
784
openpgp_crt_import.argtypes = [openpgp_crt_t,
785
ctypes.POINTER(datum_t),
787
openpgp_crt_import.restype = _error_code
789
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
790
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
791
ctypes.POINTER(ctypes.c_uint)]
792
openpgp_crt_verify_self.restype = _error_code
794
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
795
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
796
openpgp_crt_deinit.restype = None
798
openpgp_crt_get_fingerprint = (
799
_library.gnutls_openpgp_crt_get_fingerprint)
800
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
804
openpgp_crt_get_fingerprint.restype = _error_code
806
if check_version("3.6.4"):
807
certificate_type_get2 = _library.gnutls_certificate_type_get2
808
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
809
certificate_type_get2.restype = _error_code
811
# Remove non-public functions
812
del _error_code, _retry_on_error
813
# Create the global "gnutls" object, simulating a module
817
def call_pipe(connection, # : multiprocessing.Connection
818
func, *args, **kwargs):
819
"""This function is meant to be called by multiprocessing.Process
821
This function runs func(*args, **kwargs), and writes the resulting
822
return value on the provided multiprocessing.Connection.
824
connection.send(func(*args, **kwargs))
306
828
class Client(object):
307
829
"""A representation of a client host served by this server.
310
_approved: bool(); 'None' if not yet approved/disapproved
832
approved: bool(); 'None' if not yet approved/disapproved
311
833
approval_delay: datetime.timedelta(); Time to wait for approval
312
834
approval_duration: datetime.timedelta(); Duration of one approval
313
835
checker: subprocess.Popen(); a running checker process used
314
836
to see if the client lives.
315
837
'None' if no process is running.
316
checker_callback_tag: a gobject event source tag, or None
838
checker_callback_tag: a GLib event source tag, or None
317
839
checker_command: string; External command which is run to check
318
840
if client lives. %() expansions are done at
319
841
runtime with vars(self) as dict, so that for
320
842
instance %(name)s can be used in the command.
321
checker_initiator_tag: a gobject event source tag, or None
843
checker_initiator_tag: a GLib event source tag, or None
322
844
created: datetime.datetime(); (UTC) object creation
323
845
client_structure: Object describing what attributes a client has
324
846
and is used for storing the client at exit
325
847
current_checker_command: string; current running checker_command
326
disable_initiator_tag: a gobject event source tag, or None
848
disable_initiator_tag: a GLib event source tag, or None
328
850
fingerprint: string (40 or 32 hexadecimal digits); used to
329
uniquely identify the client
851
uniquely identify an OpenPGP client
852
key_id: string (64 hexadecimal digits); used to uniquely identify
853
a client using raw public keys
330
854
host: string; available for use by the checker command
331
855
interval: datetime.timedelta(); How often to start a new checker
332
856
last_approval_request: datetime.datetime(); (UTC) or None
333
857
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)
858
last_checker_status: integer between 0 and 255 reflecting exit
859
status of last checker. -1 reflects crashed
860
checker, -2 means no checker completed yet.
861
last_checker_signal: The signal which killed the last checker, if
862
last_checker_status is -1
863
last_enabled: datetime.datetime(); (UTC) or None
338
864
name: string; from the config file, used in log messages and
339
865
D-Bus identifiers
340
866
secret: bytestring; sent verbatim (over TLS) to client
341
867
timeout: datetime.timedelta(); How long from last_checked_ok
342
868
until this client is disabled
343
extended_timeout: extra long timeout when password has been sent
869
extended_timeout: extra long timeout when secret has been sent
344
870
runtime_expansions: Allowed attributes for runtime expansion.
345
871
expires: datetime.datetime(); time (UTC) when a client will be
346
872
disabled, or None
873
server_settings: The server_settings dict from main()
349
876
runtime_expansions = ("approval_delay", "approval_duration",
350
"created", "enabled", "fingerprint",
351
"host", "interval", "last_checked_ok",
877
"created", "enabled", "expires", "key_id",
878
"fingerprint", "host", "interval",
879
"last_approval_request", "last_checked_ok",
352
880
"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'
883
"extended_timeout": "PT15M",
885
"checker": "fping -q -- %%(host)s",
887
"approval_delay": "PT0S",
888
"approval_duration": "PT1S",
889
"approved_by_default": "True",
894
def config_parser(config):
895
"""Construct a new dict of client settings of this form:
896
{ client_name: {setting_name: value, ...}, ...}
897
with exceptions for any special settings as defined above.
898
NOTE: Must be a pure function. Must return the same result
899
value given the same arguments.
902
for client_name in config.sections():
903
section = dict(config.items(client_name))
904
client = settings[client_name] = {}
906
client["host"] = section["host"]
907
# Reformat values from string types to Python types
908
client["approved_by_default"] = config.getboolean(
909
client_name, "approved_by_default")
910
client["enabled"] = config.getboolean(client_name,
913
# Uppercase and remove spaces from key_id and fingerprint
914
# for later comparison purposes with return value from the
915
# key_id() and fingerprint() functions
916
client["key_id"] = (section.get("key_id", "").upper()
918
client["fingerprint"] = (section["fingerprint"].upper()
920
if "secret" in section:
921
client["secret"] = codecs.decode(section["secret"]
924
elif "secfile" in section:
925
with open(os.path.expanduser(os.path.expandvars
926
(section["secfile"])),
928
client["secret"] = secfile.read()
930
raise TypeError("No secret or secfile for section {}"
932
client["timeout"] = string_to_delta(section["timeout"])
933
client["extended_timeout"] = string_to_delta(
934
section["extended_timeout"])
935
client["interval"] = string_to_delta(section["interval"])
936
client["approval_delay"] = string_to_delta(
937
section["approval_delay"])
938
client["approval_duration"] = string_to_delta(
939
section["approval_duration"])
940
client["checker_command"] = section["checker"]
941
client["last_approval_request"] = None
942
client["last_checked_ok"] = None
943
client["last_checker_status"] = -2
947
def __init__(self, settings, name=None, server_settings=None):
949
if server_settings is None:
951
self.server_settings = server_settings
952
# adding all client settings
953
for setting, value in settings.items():
954
setattr(self, setting, value)
957
if not hasattr(self, "last_enabled"):
958
self.last_enabled = datetime.datetime.utcnow()
959
if not hasattr(self, "expires"):
960
self.expires = (datetime.datetime.utcnow()
963
self.last_enabled = None
376
966
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()
967
logger.debug(" Key ID: %s", self.key_id)
382
968
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"])
969
self.created = settings.get("created",
970
datetime.datetime.utcnow())
972
# attributes specific for this server instance
404
973
self.checker = None
405
974
self.checker_initiator_tag = None
406
975
self.disable_initiator_tag = None
407
self.expires = datetime.datetime.utcnow() + self.timeout
408
976
self.checker_callback_tag = None
409
self.checker_command = config["checker"]
410
977
self.current_checker_command = None
411
self._approved = None
412
self.approved_by_default = config.get("approved_by_default",
414
979
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("_")]
980
self.changedstate = multiprocessing_manager.Condition(
981
multiprocessing_manager.Lock())
982
self.client_structure = [attr
983
for attr in self.__dict__.keys()
984
if not attr.startswith("_")]
423
985
self.client_structure.append("client_structure")
426
for name, t in inspect.getmembers(type(self),
427
lambda obj: isinstance(obj, property)):
987
for name, t in inspect.getmembers(
988
type(self), lambda obj: isinstance(obj, property)):
428
989
if not name.startswith("_"):
429
990
self.client_structure.append(name)
431
992
# Send notice to process children that client state has changed
432
993
def send_changedstate(self):
433
994
with self.changedstate:
434
995
self.changedstate.notify_all()
436
997
def enable(self):
437
998
"""Start this client's checker and timeout hooks"""
438
999
if getattr(self, "enabled", False):
439
1000
# Already enabled
441
self.send_changedstate()
442
1002
self.expires = datetime.datetime.utcnow() + self.timeout
443
1003
self.enabled = True
444
1004
self.last_enabled = datetime.datetime.utcnow()
445
1005
self.init_checker()
1006
self.send_changedstate()
447
1008
def disable(self, quiet=True):
448
1009
"""Disable this client."""
449
1010
if not getattr(self, "enabled", False):
452
self.send_changedstate()
454
1013
logger.info("Disabling client %s", self.name)
455
if getattr(self, "disable_initiator_tag", False):
456
gobject.source_remove(self.disable_initiator_tag)
1014
if getattr(self, "disable_initiator_tag", None) is not None:
1015
GLib.source_remove(self.disable_initiator_tag)
457
1016
self.disable_initiator_tag = None
458
1017
self.expires = None
459
if getattr(self, "checker_initiator_tag", False):
460
gobject.source_remove(self.checker_initiator_tag)
1018
if getattr(self, "checker_initiator_tag", None) is not None:
1019
GLib.source_remove(self.checker_initiator_tag)
461
1020
self.checker_initiator_tag = None
462
1021
self.stop_checker()
463
1022
self.enabled = False
464
# Do not run this again if called by a gobject.timeout_add
1024
self.send_changedstate()
1025
# Do not run this again if called by a GLib.timeout_add
467
1028
def __del__(self):
470
1031
def init_checker(self):
471
1032
# Schedule a new checker to be started an 'interval' from now,
472
1033
# and every interval from then on.
473
self.checker_initiator_tag = (gobject.timeout_add
474
(self.interval_milliseconds(),
1034
if self.checker_initiator_tag is not None:
1035
GLib.source_remove(self.checker_initiator_tag)
1036
self.checker_initiator_tag = GLib.timeout_add(
1037
int(self.interval.total_seconds() * 1000),
476
1039
# Schedule a disable() when 'timeout' has passed
477
self.disable_initiator_tag = (gobject.timeout_add
478
(self.timeout_milliseconds(),
1040
if self.disable_initiator_tag is not None:
1041
GLib.source_remove(self.disable_initiator_tag)
1042
self.disable_initiator_tag = GLib.timeout_add(
1043
int(self.timeout.total_seconds() * 1000), self.disable)
480
1044
# Also start a new checker *right now*.
481
1045
self.start_checker()
484
def checker_callback(self, pid, condition, command):
1047
def checker_callback(self, source, condition, connection,
485
1049
"""The checker has completed, so take appropriate actions."""
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)
1052
# Read return code from connection (see call_pipe)
1053
returncode = connection.recv()
1057
self.last_checker_status = returncode
1058
self.last_checker_signal = None
490
1059
if self.last_checker_status == 0:
491
1060
logger.info("Checker for %(name)s succeeded",
493
1062
self.checked_ok()
495
logger.info("Checker for %(name)s failed",
1064
logger.info("Checker for %(name)s failed", vars(self))
498
1066
self.last_checker_status = -1
1067
self.last_checker_signal = -returncode
499
1068
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,
1072
def checked_ok(self):
1073
"""Assert that the client has been seen, alive and well."""
1074
self.last_checked_ok = datetime.datetime.utcnow()
1075
self.last_checker_status = 0
1076
self.last_checker_signal = None
1079
def bump_timeout(self, timeout=None):
1080
"""Bump up the timeout for this client."""
508
1081
if timeout is None:
509
1082
timeout = self.timeout
510
self.last_checked_ok = datetime.datetime.utcnow()
511
1083
if self.disable_initiator_tag is not None:
512
gobject.source_remove(self.disable_initiator_tag)
1084
GLib.source_remove(self.disable_initiator_tag)
1085
self.disable_initiator_tag = None
513
1086
if getattr(self, "enabled", False):
514
self.disable_initiator_tag = (gobject.timeout_add
515
(_timedelta_to_milliseconds
516
(timeout), self.disable))
1087
self.disable_initiator_tag = GLib.timeout_add(
1088
int(timeout.total_seconds() * 1000), self.disable)
517
1089
self.expires = datetime.datetime.utcnow() + timeout
519
1091
def need_approval(self):
520
1092
self.last_approval_request = datetime.datetime.utcnow()
522
1094
def start_checker(self):
523
1095
"""Start a new checker subprocess if one is not running.
525
1097
If a checker already exists, leave it running and do
527
1099
# 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
1100
# did that, and if a checker (for some reason) started running
1101
# slowly and taking more than 'interval' time, then the client
1102
# would inevitably timeout, since no checker would get a
1103
# chance to run to completion. If we instead leave running
532
1104
# checkers alone, the checker would have to take more time
533
1105
# 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)
1108
if self.checker is not None and not self.checker.is_alive():
1109
logger.warning("Checker was not alive; joining")
549
1112
# Start a new checker if needed
550
1113
if self.checker is None:
1114
# Escape attributes for the shell
1116
attr: re.escape(str(getattr(self, attr)))
1117
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
1119
command = self.checker_command % escaped_attrs
1120
except TypeError as error:
1121
logger.error('Could not format string "%s"',
1122
self.checker_command,
1124
return True # Try again later
570
1125
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
1126
logger.info("Starting checker %r for %s", command,
1128
# We don't need to redirect stdout and stderr, since
1129
# in normal mode, that is already done by daemon(),
1130
# and in debug mode we don't want to. (Stdin is
1131
# always replaced by /dev/null.)
1132
# The exception is when not debugging but nevertheless
1133
# running in the foreground; use the previously
1135
popen_args = {"close_fds": True,
1138
if (not self.server_settings["debug"]
1139
and self.server_settings["foreground"]):
1140
popen_args.update({"stdout": wnull,
1142
pipe = multiprocessing.Pipe(duplex=False)
1143
self.checker = multiprocessing.Process(
1145
args=(pipe[1], subprocess.call, command),
1147
self.checker.start()
1148
self.checker_callback_tag = GLib.io_add_watch(
1149
pipe[0].fileno(), GLib.IO_IN,
1150
self.checker_callback, pipe[0], command)
1151
# Re-run this periodically if run by GLib.timeout_add
597
1154
def stop_checker(self):
598
1155
"""Force the checker process, if any, to stop."""
599
1156
if self.checker_callback_tag:
600
gobject.source_remove(self.checker_callback_tag)
1157
GLib.source_remove(self.checker_callback_tag)
601
1158
self.checker_callback_tag = None
602
1159
if getattr(self, "checker", None) is None:
604
1161
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
1162
self.checker.terminate()
613
1163
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):
1166
def dbus_service_property(dbus_interface,
664
1170
"""Decorators for marking methods of a DBusObjectWithProperties to
665
1171
become properties on the D-Bus.
667
1173
The decorated method will be called with no arguments by "Get"
668
1174
and with one argument by "Set".
670
1176
The parameters, where they are supported, are the same as
671
1177
dbus.service.method, except there is only "signature", since the
672
1178
type from Get() and the type sent to Set() is the same.
842
1511
except (AttributeError, xml.dom.DOMException,
843
1512
xml.parsers.expat.ExpatError) as error:
844
1513
logger.error("Failed to override Introspection method",
849
def datetime_to_dbus (dt, variant_level=0):
1519
dbus.OBJECT_MANAGER_IFACE
1520
except AttributeError:
1521
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1524
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1525
"""A D-Bus object with an ObjectManager.
1527
Classes inheriting from this exposes the standard
1528
GetManagedObjects call and the InterfacesAdded and
1529
InterfacesRemoved signals on the standard
1530
"org.freedesktop.DBus.ObjectManager" interface.
1532
Note: No signals are sent automatically; they must be sent
1535
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1536
out_signature="a{oa{sa{sv}}}")
1537
def GetManagedObjects(self):
1538
"""This function must be overridden"""
1539
raise NotImplementedError()
1541
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1542
signature="oa{sa{sv}}")
1543
def InterfacesAdded(self, object_path, interfaces_and_properties):
1546
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1547
def InterfacesRemoved(self, object_path, interfaces):
1550
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1552
path_keyword='object_path',
1553
connection_keyword='connection')
1554
def Introspect(self, object_path, connection):
1555
"""Overloading of standard D-Bus method.
1557
Override return argument name of GetManagedObjects to be
1558
"objpath_interfaces_and_properties"
1560
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1564
document = xml.dom.minidom.parseString(xmlstring)
1566
for if_tag in document.getElementsByTagName("interface"):
1567
# Fix argument name for the GetManagedObjects method
1568
if (if_tag.getAttribute("name")
1569
== dbus.OBJECT_MANAGER_IFACE):
1570
for cn in if_tag.getElementsByTagName("method"):
1571
if (cn.getAttribute("name")
1572
== "GetManagedObjects"):
1573
for arg in cn.getElementsByTagName("arg"):
1574
if (arg.getAttribute("direction")
1578
"objpath_interfaces"
1580
xmlstring = document.toxml("utf-8")
1582
except (AttributeError, xml.dom.DOMException,
1583
xml.parsers.expat.ExpatError) as error:
1584
logger.error("Failed to override Introspection method",
1589
def datetime_to_dbus(dt, variant_level=0):
850
1590
"""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.
1592
return dbus.String("", variant_level=variant_level)
1593
return dbus.String(dt.isoformat(), variant_level=variant_level)
1596
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1597
"""A class decorator; applied to a subclass of
1598
dbus.service.Object, it will add alternate D-Bus attributes with
1599
interface names according to the "alt_interface_names" mapping.
1602
@alternate_dbus_interfaces({"org.example.Interface":
1603
"net.example.AlternateInterface"})
1604
class SampleDBusObject(dbus.service.Object):
1605
@dbus.service.method("org.example.Interface")
1606
def SampleDBusMethod():
1609
The above "SampleDBusMethod" on "SampleDBusObject" will be
1610
reachable via two interfaces: "org.example.Interface" and
1611
"net.example.AlternateInterface", the latter of which will have
1612
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1613
"true", unless "deprecate" is passed with a False value.
1615
This works for methods and signals, and also for D-Bus properties
1616
(from DBusObjectWithProperties) and interfaces (from the
1617
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):
1621
for orig_interface_name, alt_interface_name in (
1622
alt_interface_names.items()):
1624
interface_names = set()
1625
# Go though all attributes of the class
1626
for attrname, attribute in inspect.getmembers(cls):
868
1627
# Ignore non-D-Bus attributes, and D-Bus attributes
869
1628
# with the wrong interface name
870
1629
if (not hasattr(attribute, "_dbus_interface")
871
or not attribute._dbus_interface
872
.startswith("se.recompile.Mandos")):
1630
or not attribute._dbus_interface.startswith(
1631
orig_interface_name)):
874
1633
# Create an alternate D-Bus interface name based on
875
1634
# the current name
876
alt_interface = (attribute._dbus_interface
877
.replace("se.recompile.Mandos",
878
"se.bsnet.fukt.Mandos"))
1635
alt_interface = attribute._dbus_interface.replace(
1636
orig_interface_name, alt_interface_name)
1637
interface_names.add(alt_interface)
879
1638
# Is this a D-Bus signal?
880
1639
if getattr(attribute, "_dbus_is_signal", False):
881
# Extract the original non-method function by
883
nonmethod_func = (dict(
1640
# Extract the original non-method undecorated
1641
# function by black magic
1642
if sys.version_info.major == 2:
1643
nonmethod_func = (dict(
884
1644
zip(attribute.func_code.co_freevars,
885
attribute.__closure__))["func"]
1645
attribute.__closure__))
1646
["func"].cell_contents)
1648
nonmethod_func = (dict(
1649
zip(attribute.__code__.co_freevars,
1650
attribute.__closure__))
1651
["func"].cell_contents)
887
1652
# Create a new, but exactly alike, function
888
1653
# object, and decorate it to be a new D-Bus signal
889
1654
# 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)))
1655
new_function = copy_function(nonmethod_func)
1656
new_function = (dbus.service.signal(
1658
attribute._dbus_signature)(new_function))
1659
# Copy annotations, if any
1661
new_function._dbus_annotations = dict(
1662
attribute._dbus_annotations)
1663
except AttributeError:
899
1666
# 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
1667
# original and alternate functions, so both the
1668
# original and alternate signals gets sent when
1669
# the function is called
902
1670
def fixscope(func1, func2):
903
1671
"""This function is a scope container to pass
904
1672
func1 and func2 to the "call_both" function
905
1673
outside of its arguments"""
1675
@functools.wraps(func2)
906
1676
def call_both(*args, **kwargs):
907
1677
"""This function will emit two D-Bus
908
1678
signals by calling func1 and func2"""
909
1679
func1(*args, **kwargs)
910
1680
func2(*args, **kwargs)
1681
# Make wrapper function look like a D-Bus
1683
for name, attr in inspect.getmembers(func2):
1684
if name.startswith("_dbus_"):
1685
setattr(call_both, name, attr)
911
1687
return call_both
912
1688
# Create the "call_both" function and add it to
914
attr[attrname] = fixscope(attribute,
1690
attr[attrname] = fixscope(attribute, new_function)
916
1691
# Is this a D-Bus method?
917
1692
elif getattr(attribute, "_dbus_is_method", False):
918
1693
# Create a new, but exactly alike, function
919
1694
# object. Decorate it to be a new D-Bus method
920
1695
# 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)))
1698
dbus.service.method(
1700
attribute._dbus_in_signature,
1701
attribute._dbus_out_signature)
1702
(copy_function(attribute)))
1703
# Copy annotations, if any
1705
attr[attrname]._dbus_annotations = dict(
1706
attribute._dbus_annotations)
1707
except AttributeError:
932
1709
# Is this a D-Bus property?
933
1710
elif getattr(attribute, "_dbus_is_property", False):
934
1711
# Create a new, but exactly alike, function
935
1712
# object, and decorate it to be a new D-Bus
936
1713
# property with the alternate D-Bus interface
937
1714
# 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)
1715
attr[attrname] = (dbus_service_property(
1716
alt_interface, attribute._dbus_signature,
1717
attribute._dbus_access,
1718
attribute._dbus_get_args_options
1720
(copy_function(attribute)))
1721
# Copy annotations, if any
1723
attr[attrname]._dbus_annotations = dict(
1724
attribute._dbus_annotations)
1725
except AttributeError:
1727
# Is this a D-Bus interface?
1728
elif getattr(attribute, "_dbus_is_interface", False):
1729
# Create a new, but exactly alike, function
1730
# object. Decorate it to be a new D-Bus interface
1731
# with the alternate D-Bus interface name. Add it
1734
dbus_interface_annotations(alt_interface)
1735
(copy_function(attribute)))
1737
# Deprecate all alternate interfaces
1738
iname = "_AlternateDBusNames_interface_annotation{}"
1739
for interface_name in interface_names:
1741
@dbus_interface_annotations(interface_name)
1743
return {"org.freedesktop.DBus.Deprecated":
1745
# Find an unused name
1746
for aname in (iname.format(i)
1747
for i in itertools.count()):
1748
if aname not in attr:
1752
# Replace the class with a new subclass of it with
1753
# methods, signals, etc. as created above.
1754
if sys.version_info.major == 2:
1755
cls = type(b"{}Alternate".format(cls.__name__),
1758
cls = type("{}Alternate".format(cls.__name__),
1765
@alternate_dbus_interfaces({"se.recompile.Mandos":
1766
"se.bsnet.fukt.Mandos"})
953
1767
class ClientDBus(Client, DBusObjectWithProperties):
954
1768
"""A Client class using D-Bus
957
1771
dbus_object_path: dbus.ObjectPath
958
1772
bus: dbus.SystemBus()
961
1775
runtime_expansions = (Client.runtime_expansions
962
+ ("dbus_object_path",))
1776
+ ("dbus_object_path", ))
1778
_interface = "se.recompile.Mandos.Client"
964
1780
# dbus.service.Object doesn't use super(), so we can't either.
966
def __init__(self, bus = None, *args, **kwargs):
1782
def __init__(self, bus=None, *args, **kwargs):
968
1784
Client.__init__(self, *args, **kwargs)
970
self._approvals_pending = 0
971
1785
# Only now, when this client is initialized, can it show up on
973
client_object_name = unicode(self.name).translate(
1787
client_object_name = str(self.name).translate(
974
1788
{ord("."): ord("_"),
975
1789
ord("-"): ord("_")})
976
self.dbus_object_path = (dbus.ObjectPath
977
("/clients/" + client_object_name))
1790
self.dbus_object_path = dbus.ObjectPath(
1791
"/clients/" + client_object_name)
978
1792
DBusObjectWithProperties.__init__(self, self.bus,
979
1793
self.dbus_object_path)
981
def notifychangeproperty(transform_func,
982
dbus_name, type_func=lambda x: x,
1795
def notifychangeproperty(transform_func, dbus_name,
1796
type_func=lambda x: x,
1798
invalidate_only=False,
1799
_interface=_interface):
984
1800
""" Modify a variable so that it's a property which announces
985
1801
its changes to DBus.
1345
2196
self.start_checker()
1347
2198
self.stop_checker()
1349
2200
# ObjectPath - property
2202
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2203
"org.freedesktop.DBus.Deprecated": "true"})
1350
2204
@dbus_service_property(_interface, signature="o", access="read")
1351
2205
def ObjectPath_dbus_property(self):
1352
return self.dbus_object_path # is already a dbus.ObjectPath
2206
return self.dbus_object_path # is already a dbus.ObjectPath
1354
2208
# Secret = property
1355
@dbus_service_property(_interface, signature="ay",
1356
access="write", byte_arrays=True)
2210
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2212
@dbus_service_property(_interface,
1357
2216
def Secret_dbus_property(self, value):
1358
self.secret = str(value)
2217
self.secret = bytes(value)
1363
2222
class ProxyClient(object):
1364
def __init__(self, child_pipe, fpr, address):
2223
def __init__(self, child_pipe, key_id, fpr, address):
1365
2224
self._pipe = child_pipe
1366
self._pipe.send(('init', fpr, address))
2225
self._pipe.send(('init', key_id, fpr, address))
1367
2226
if not self._pipe.recv():
2227
raise KeyError(key_id or fpr)
1370
2229
def __getattribute__(self, name):
1371
if(name == '_pipe'):
1372
2231
return super(ProxyClient, self).__getattribute__(name)
1373
2232
self._pipe.send(('getattr', name))
1374
2233
data = self._pipe.recv()
1375
2234
if data[0] == 'data':
1377
2236
if data[0] == 'function':
1378
2238
def func(*args, **kwargs):
1379
2239
self._pipe.send(('funcall', name, args, kwargs))
1380
2240
return self._pipe.recv()[1]
1383
2244
def __setattr__(self, name, value):
1384
if(name == '_pipe'):
1385
2246
return super(ProxyClient, self).__setattr__(name, value)
1386
2247
self._pipe.send(('setattr', name, value))
1388
class ClientDBusTransitional(ClientDBus):
1389
__metaclass__ = AlternateDBusNamesMetaclass
1391
2250
class ClientHandler(socketserver.BaseRequestHandler, object):
1392
2251
"""A class to handle client connections.
1394
2253
Instantiated once for each connection to handle it.
1395
2254
Note: This will run in its own forked process."""
1397
2256
def handle(self):
1398
2257
with contextlib.closing(self.server.child_pipe) as child_pipe:
1399
2258
logger.info("TCP connection from: %s",
1400
unicode(self.client_address))
2259
str(self.client_address))
1401
2260
logger.debug("Pipe FD: %d",
1402
2261
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",
2263
session = gnutls.ClientSession(self.request)
2265
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2266
# "+AES-256-CBC", "+SHA1",
2267
# "+COMP-NULL", "+CTYPE-OPENPGP",
1418
2269
# Use a fallback default, since this MUST be set.
1419
2270
priority = self.server.gnutls_priority
1420
2271
if priority is None:
1421
2272
priority = "NORMAL"
1422
(gnutls.library.functions
1423
.gnutls_priority_set_direct(session._c_object,
2273
gnutls.priority_set_direct(session._c_object,
2274
priority.encode("utf-8"),
1426
2277
# Start communication using the Mandos protocol
1427
2278
# Get protocol number
1428
2279
line = self.request.makefile().readline()
1429
2280
logger.debug("Protocol version: %r", line)
1431
2282
if int(line.strip().split()[0]) > 1:
2283
raise RuntimeError(line)
1433
2284
except (ValueError, IndexError, RuntimeError) as error:
1434
2285
logger.error("Unknown protocol version: %s", error)
1437
2288
# Start GnuTLS connection
1439
2290
session.handshake()
1440
except gnutls.errors.GNUTLSError as error:
2291
except gnutls.Error as error:
1441
2292
logger.warning("Handshake failed: %s", error)
1442
2293
# Do not run session.bye() here: the session is not
1443
2294
# established. Just abandon the request.
1445
2296
logger.debug("Handshake succeeded")
1447
2298
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,
2300
if gnutls.has_rawpk:
2303
key_id = self.key_id(
2304
self.peer_certificate(session))
2305
except (TypeError, gnutls.Error) as error:
2306
logger.warning("Bad certificate: %s", error)
2308
logger.debug("Key ID: %s", key_id)
2313
fpr = self.fingerprint(
2314
self.peer_certificate(session))
2315
except (TypeError, gnutls.Error) as error:
2316
logger.warning("Bad certificate: %s", error)
2318
logger.debug("Fingerprint: %s", fpr)
2321
client = ProxyClient(child_pipe, key_id, fpr,
1463
2322
self.client_address)
1464
2323
except KeyError:
1467
2326
if client.approval_delay:
1468
2327
delay = client.approval_delay
1469
2328
client.approvals_pending += 1
1470
2329
approval_required = True
1473
2332
if not client.enabled:
1474
2333
logger.info("Client %s is disabled",
1476
2335
if self.server.use_dbus:
1477
2336
# Emit D-Bus signal
1478
2337
client.Rejected("Disabled")
1481
if client._approved or not client.approval_delay:
1482
#We are approved or approval is disabled
2340
if client.approved or not client.approval_delay:
2341
# We are approved or approval is disabled
1484
elif client._approved is None:
2343
elif client.approved is None:
1485
2344
logger.info("Client %s needs approval",
1487
2346
if self.server.use_dbus:
1488
2347
# Emit D-Bus signal
1489
2348
client.NeedApproval(
1490
client.approval_delay_milliseconds(),
1491
client.approved_by_default)
2349
client.approval_delay.total_seconds()
2350
* 1000, client.approved_by_default)
1493
2352
logger.warning("Client %s was not approved",
1520
2377
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))
2380
session.send(client.secret)
2381
except gnutls.Error as error:
2382
logger.warning("gnutls send failed",
1534
2386
logger.info("Sending secret to %s", client.name)
1535
2387
# bump the timeout using extended_timeout
1536
client.checked_ok(client.extended_timeout)
2388
client.bump_timeout(client.extended_timeout)
1537
2389
if self.server.use_dbus:
1538
2390
# Emit D-Bus signal
1539
2391
client.GotSecret()
1542
2394
if approval_required:
1543
2395
client.approvals_pending -= 1
1546
except gnutls.errors.GNUTLSError as error:
1547
logger.warning("GnuTLS bye failed")
2398
except gnutls.Error as error:
2399
logger.warning("GnuTLS bye failed",
1550
2403
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
2404
"Return the peer's certificate as a bytestring"
2406
cert_type = gnutls.certificate_type_get2(session._c_object,
2408
except AttributeError:
2409
cert_type = gnutls.certificate_type_get(session._c_object)
2410
if gnutls.has_rawpk:
2411
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2413
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2414
# If not a valid certificate type...
2415
if cert_type not in valid_cert_types:
2416
logger.info("Cert type %r not in %r", cert_type,
2418
# ...return invalid data
1558
2420
list_size = ctypes.c_uint(1)
1559
cert_list = (gnutls.library.functions
1560
.gnutls_certificate_get_peers
2421
cert_list = (gnutls.certificate_get_peers
1561
2422
(session._c_object, ctypes.byref(list_size)))
1562
2423
if not bool(cert_list) and list_size.value != 0:
1563
raise gnutls.errors.GNUTLSError("error getting peer"
2424
raise gnutls.Error("error getting peer certificate")
1565
2425
if list_size.value == 0:
1567
2427
cert = cert_list[0]
1568
2428
return ctypes.string_at(cert.data, cert.size)
2431
def key_id(certificate):
2432
"Convert a certificate bytestring to a hexdigit key ID"
2433
# New GnuTLS "datum" with the public key
2434
datum = gnutls.datum_t(
2435
ctypes.cast(ctypes.c_char_p(certificate),
2436
ctypes.POINTER(ctypes.c_ubyte)),
2437
ctypes.c_uint(len(certificate)))
2438
# XXX all these need to be created in the gnutls "module"
2439
# New empty GnuTLS certificate
2440
pubkey = gnutls.pubkey_t()
2441
gnutls.pubkey_init(ctypes.byref(pubkey))
2442
# Import the raw public key into the certificate
2443
gnutls.pubkey_import(pubkey,
2444
ctypes.byref(datum),
2445
gnutls.X509_FMT_DER)
2446
# New buffer for the key ID
2447
buf = ctypes.create_string_buffer(32)
2448
buf_len = ctypes.c_size_t(len(buf))
2449
# Get the key ID from the raw public key into the buffer
2450
gnutls.pubkey_get_key_id(pubkey,
2451
gnutls.KEYID_USE_SHA256,
2452
ctypes.cast(ctypes.byref(buf),
2453
ctypes.POINTER(ctypes.c_ubyte)),
2454
ctypes.byref(buf_len))
2455
# Deinit the certificate
2456
gnutls.pubkey_deinit(pubkey)
2458
# Convert the buffer to a Python bytestring
2459
key_id = ctypes.string_at(buf, buf_len.value)
2460
# Convert the bytestring to hexadecimal notation
2461
hex_key_id = binascii.hexlify(key_id).upper()
1571
2465
def fingerprint(openpgp):
1572
2466
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1573
2467
# 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))))
2468
datum = gnutls.datum_t(
2469
ctypes.cast(ctypes.c_char_p(openpgp),
2470
ctypes.POINTER(ctypes.c_ubyte)),
2471
ctypes.c_uint(len(openpgp)))
1579
2472
# 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)))
2473
crt = gnutls.openpgp_crt_t()
2474
gnutls.openpgp_crt_init(ctypes.byref(crt))
1583
2475
# 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))
2476
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2477
gnutls.OPENPGP_FMT_RAW)
1588
2478
# Verify the self signature in the key
1589
2479
crtverify = ctypes.c_uint()
1590
(gnutls.library.functions
1591
.gnutls_openpgp_crt_verify_self(crt, 0,
1592
ctypes.byref(crtverify)))
2480
gnutls.openpgp_crt_verify_self(crt, 0,
2481
ctypes.byref(crtverify))
1593
2482
if crtverify.value != 0:
1594
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1595
raise (gnutls.errors.CertificateSecurityError
2483
gnutls.openpgp_crt_deinit(crt)
2484
raise gnutls.CertificateSecurityError(code
1597
2486
# New buffer for the fingerprint
1598
2487
buf = ctypes.create_string_buffer(20)
1599
2488
buf_len = ctypes.c_size_t()
1600
2489
# 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)))
2490
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2491
ctypes.byref(buf_len))
1604
2492
# Deinit the certificate
1605
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2493
gnutls.openpgp_crt_deinit(crt)
1606
2494
# Convert the buffer to a Python bytestring
1607
2495
fpr = ctypes.string_at(buf, buf_len.value)
1608
2496
# Convert the bytestring to hexadecimal notation
1609
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2497
hex_fpr = binascii.hexlify(fpr).upper()
1613
2501
class MultiprocessingMixIn(object):
1614
2502
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1615
2504
def sub_process_main(self, request, address):
1617
2506
self.finish_request(request, address)
1619
2508
self.handle_error(request, address)
1620
2509
self.close_request(request)
1622
2511
def process_request(self, request, address):
1623
2512
"""Start a new process to process the request."""
1624
proc = multiprocessing.Process(target = self.sub_process_main,
2513
proc = multiprocessing.Process(target=self.sub_process_main,
2514
args=(request, address))
1631
2519
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1632
2520
""" adds a pipe to the MixIn """
1633
2522
def process_request(self, request, client_address):
1634
2523
"""Overrides and wraps the original process_request().
1636
2525
This function creates a new pipe in self.pipe
1638
2527
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1640
2529
proc = MultiprocessingMixIn.process_request(self, request,
1641
2530
client_address)
1642
2531
self.child_pipe.close()
1643
2532
self.add_pipe(parent_pipe, proc)
1645
2534
def add_pipe(self, parent_pipe, proc):
1646
2535
"""Dummy function; override as necessary"""
1647
raise NotImplementedError
2536
raise NotImplementedError()
1650
2539
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1651
2540
socketserver.TCPServer, object):
1652
2541
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1655
2544
enabled: Boolean; whether this server is activated yet
1656
2545
interface: None or a network interface name (string)
1657
2546
use_ipv6: Boolean; to use IPv6 or not
1659
2549
def __init__(self, server_address, RequestHandlerClass,
1660
interface=None, use_ipv6=True):
2553
"""If socketfd is set, use that file descriptor instead of
2554
creating a new one with socket.socket().
1661
2556
self.interface = interface
1663
2558
self.address_family = socket.AF_INET6
2559
if socketfd is not None:
2560
# Save the file descriptor
2561
self.socketfd = socketfd
2562
# Save the original socket.socket() function
2563
self.socket_socket = socket.socket
2565
# To implement --socket, we monkey patch socket.socket.
2567
# (When socketserver.TCPServer is a new-style class, we
2568
# could make self.socket into a property instead of monkey
2569
# patching socket.socket.)
2571
# Create a one-time-only replacement for socket.socket()
2572
@functools.wraps(socket.socket)
2573
def socket_wrapper(*args, **kwargs):
2574
# Restore original function so subsequent calls are
2576
socket.socket = self.socket_socket
2577
del self.socket_socket
2578
# This time only, return a new socket object from the
2579
# saved file descriptor.
2580
return socket.fromfd(self.socketfd, *args, **kwargs)
2581
# Replace socket.socket() function with wrapper
2582
socket.socket = socket_wrapper
2583
# The socketserver.TCPServer.__init__ will call
2584
# socket.socket(), which might be our replacement,
2585
# socket_wrapper(), if socketfd was set.
1664
2586
socketserver.TCPServer.__init__(self, server_address,
1665
2587
RequestHandlerClass)
1666
2589
def server_bind(self):
1667
2590
"""This overrides the normal server_bind() function
1668
2591
to bind to an interface if one was specified, and also NOT to
1669
2592
bind to an address or port if they were not specified."""
2593
global SO_BINDTODEVICE
1670
2594
if self.interface is not None:
1671
2595
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",
2596
# Fall back to a hard-coded value which seems to be
2598
logger.warning("SO_BINDTODEVICE not found, trying 25")
2599
SO_BINDTODEVICE = 25
2601
self.socket.setsockopt(
2602
socket.SOL_SOCKET, SO_BINDTODEVICE,
2603
(self.interface + "\0").encode("utf-8"))
2604
except socket.error as error:
2605
if error.errno == errno.EPERM:
2606
logger.error("No permission to bind to"
2607
" interface %s", self.interface)
2608
elif error.errno == errno.ENOPROTOOPT:
2609
logger.error("SO_BINDTODEVICE not available;"
2610
" cannot bind to interface %s",
2612
elif error.errno == errno.ENODEV:
2613
logger.error("Interface %s does not exist,"
2614
" cannot bind", self.interface)
1692
2617
# Only bind(2) the socket if we really need to.
1693
2618
if self.server_address[0] or self.server_address[1]:
1694
2619
if not self.server_address[0]:
1695
2620
if self.address_family == socket.AF_INET6:
1696
any_address = "::" # in6addr_any
2621
any_address = "::" # in6addr_any
1698
any_address = socket.INADDR_ANY
2623
any_address = "0.0.0.0" # INADDR_ANY
1699
2624
self.server_address = (any_address,
1700
2625
self.server_address[1])
1701
2626
elif not self.server_address[1]:
1702
self.server_address = (self.server_address[0],
2627
self.server_address = (self.server_address[0], 0)
1704
2628
# if self.interface:
1705
2629
# self.server_address = (self.server_address[0],
1927
2957
parser.add_argument("--no-dbus", action="store_false",
1928
2958
dest="use_dbus", help="Do not provide D-Bus"
1929
" system bus interface")
2959
" system bus interface", default=None)
1930
2960
parser.add_argument("--no-ipv6", action="store_false",
1931
dest="use_ipv6", help="Do not use IPv6")
2961
dest="use_ipv6", help="Do not use IPv6",
1932
2963
parser.add_argument("--no-restore", action="store_false",
1933
dest="restore", help="Do not restore stored state",
2964
dest="restore", help="Do not restore stored"
2965
" state", default=None)
2966
parser.add_argument("--socket", type=int,
2967
help="Specify a file descriptor to a network"
2968
" socket to use instead of creating one")
2969
parser.add_argument("--statedir", metavar="DIR",
2970
help="Directory to save/restore state in")
2971
parser.add_argument("--foreground", action="store_true",
2972
help="Run in foreground", default=None)
2973
parser.add_argument("--no-zeroconf", action="store_false",
2974
dest="zeroconf", help="Do not use Zeroconf",
1936
2977
options = parser.parse_args()
1938
2979
if options.check:
2981
fail_count, test_count = doctest.testmod()
2982
sys.exit(os.EX_OK if fail_count == 0 else 1)
1943
2984
# Default values for config file for server-global settings
1944
server_defaults = { "interface": "",
1949
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1950
"servicename": "Mandos",
2985
if gnutls.has_rawpk:
2986
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2987
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2989
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2990
":+SIGN-DSA-SHA256")
2991
server_defaults = {"interface": "",
2995
"priority": priority,
2996
"servicename": "Mandos",
3002
"statedir": "/var/lib/mandos",
3003
"foreground": "False",
1956
3008
# Parse config file for server-global settings
1957
3009
server_config = configparser.SafeConfigParser(server_defaults)
1958
3010
del server_defaults
1959
server_config.read(os.path.join(options.configdir,
3011
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1961
3012
# Convert the SafeConfigParser object to a dict
1962
3013
server_settings = server_config.defaults()
1963
3014
# Use the appropriate methods on the non-string config options
1964
for option in ("debug", "use_dbus", "use_ipv6"):
3015
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3016
"foreground", "zeroconf"):
1965
3017
server_settings[option] = server_config.getboolean("DEFAULT",
1967
3019
if server_settings["port"]:
1968
3020
server_settings["port"] = server_config.getint("DEFAULT",
3022
if server_settings["socket"]:
3023
server_settings["socket"] = server_config.getint("DEFAULT",
3025
# Later, stdin will, and stdout and stderr might, be dup'ed
3026
# over with an opened os.devnull. But we don't want this to
3027
# happen with a supplied network socket.
3028
if 0 <= server_settings["socket"] <= 2:
3029
server_settings["socket"] = os.dup(server_settings
1970
3031
del server_config
1972
3033
# Override the settings from the config file with command line
1973
3034
# options, if set.
1974
3035
for option in ("interface", "address", "port", "debug",
1975
"priority", "servicename", "configdir",
1976
"use_dbus", "use_ipv6", "debuglevel", "restore"):
3036
"priority", "servicename", "configdir", "use_dbus",
3037
"use_ipv6", "debuglevel", "restore", "statedir",
3038
"socket", "foreground", "zeroconf"):
1977
3039
value = getattr(options, option)
1978
3040
if value is not None:
1979
3041
server_settings[option] = value
1981
3043
# Force all strings to be unicode
1982
3044
for option in server_settings.keys():
1983
if type(server_settings[option]) is str:
1984
server_settings[option] = unicode(server_settings[option])
3045
if isinstance(server_settings[option], bytes):
3046
server_settings[option] = (server_settings[option]
3048
# Force all boolean options to be boolean
3049
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3050
"foreground", "zeroconf"):
3051
server_settings[option] = bool(server_settings[option])
3052
# Debug implies foreground
3053
if server_settings["debug"]:
3054
server_settings["foreground"] = True
1985
3055
# Now we have our good server settings in "server_settings"
1987
3057
##################################################################
3059
if (not server_settings["zeroconf"]
3060
and not (server_settings["port"]
3061
or server_settings["socket"] != "")):
3062
parser.error("Needs port or socket to work without Zeroconf")
1989
3064
# For convenience
1990
3065
debug = server_settings["debug"]
1991
3066
debuglevel = server_settings["debuglevel"]
1992
3067
use_dbus = server_settings["use_dbus"]
1993
3068
use_ipv6 = server_settings["use_ipv6"]
3069
stored_state_path = os.path.join(server_settings["statedir"],
3071
foreground = server_settings["foreground"]
3072
zeroconf = server_settings["zeroconf"]
1996
initlogger(logging.DEBUG)
3075
initlogger(debug, logging.DEBUG)
1998
3077
if not debuglevel:
2001
3080
level = getattr(logging, debuglevel.upper())
3081
initlogger(debug, level)
2004
3083
if server_settings["servicename"] != "Mandos":
2005
syslogger.setFormatter(logging.Formatter
2006
('Mandos (%s) [%%(process)d]:'
2007
' %%(levelname)s: %%(message)s'
2008
% server_settings["servicename"]))
3084
syslogger.setFormatter(
3085
logging.Formatter('Mandos ({}) [%(process)d]:'
3086
' %(levelname)s: %(message)s'.format(
3087
server_settings["servicename"])))
2010
3089
# 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)
3090
client_config = configparser.SafeConfigParser(Client
2020
3092
client_config.read(os.path.join(server_settings["configdir"],
2021
3093
"clients.conf"))
2023
3095
global mandos_dbus_service
2024
3096
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
3099
if server_settings["socket"] != "":
3100
socketfd = server_settings["socket"]
3101
tcp_server = MandosServer(
3102
(server_settings["address"], server_settings["port"]),
3104
interface=(server_settings["interface"] or None),
3106
gnutls_priority=server_settings["priority"],
3110
pidfilename = "/run/mandos.pid"
3111
if not os.path.isdir("/run/."):
3112
pidfilename = "/var/run/mandos.pid"
3115
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3116
except IOError as e:
3117
logger.error("Could not open file %r", pidfilename,
3120
for name, group in (("_mandos", "_mandos"),
3121
("mandos", "mandos"),
3122
("nobody", "nogroup")):
3124
uid = pwd.getpwnam(name).pw_uid
3125
gid = pwd.getpwnam(group).pw_gid
2049
3127
except KeyError:
2051
uid = pwd.getpwnam("nobody").pw_uid
2052
gid = pwd.getpwnam("nobody").pw_gid
3136
logger.debug("Did setuid/setgid to {}:{}".format(uid,
2059
3138
except OSError as error:
2060
if error[0] != errno.EPERM:
3139
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3140
.format(uid, gid, os.strerror(error.errno)))
3141
if error.errno != errno.EPERM:
2064
3145
# Enable all possible GnuTLS debugging
2066
3147
# "Use a log level over 10 to enable all debugging options."
2067
3148
# - GnuTLS manual
2068
gnutls.library.functions.gnutls_global_set_log_level(11)
2070
@gnutls.library.types.gnutls_log_func
3149
gnutls.global_set_log_level(11)
2071
3152
def debug_gnutls(level, string):
2072
3153
logger.debug("GnuTLS: %s", string[:-1])
2074
(gnutls.library.functions
2075
.gnutls_global_set_log_function(debug_gnutls))
3155
gnutls.global_set_log_function(debug_gnutls)
2077
3157
# Redirect stdin so all checkers get /dev/null
2078
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3158
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2079
3159
os.dup2(null, sys.stdin.fileno())
2083
# No console logging
2084
logger.removeHandler(console)
2086
3163
# Need to fork before connecting to D-Bus
2088
3165
# Close all input and output, do double fork, etc.
3168
# multiprocessing will use threads, so before we use GLib we need
3169
# to inform GLib that threads will be used.
2091
3172
global main_loop
2092
3173
# From the Avahi example code
2093
DBusGMainLoop(set_as_default=True )
2094
main_loop = gobject.MainLoop()
3174
DBusGMainLoop(set_as_default=True)
3175
main_loop = GLib.MainLoop()
2095
3176
bus = dbus.SystemBus()
2096
3177
# End of Avahi example code
2099
3180
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")
3183
old_bus_name = dbus.service.BusName(
3184
"se.bsnet.fukt.Mandos", bus,
3186
except dbus.exceptions.DBusException as e:
3187
logger.error("Disabling D-Bus:", exc_info=e)
2106
3188
use_dbus = False
2107
3189
server_settings["use_dbus"] = False
2108
3190
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"])))
3192
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3193
service = AvahiServiceToSyslog(
3194
name=server_settings["servicename"],
3195
servicetype="_mandos._tcp",
3198
if server_settings["interface"]:
3199
service.interface = if_nametoindex(
3200
server_settings["interface"].encode("utf-8"))
2118
3202
global multiprocessing_manager
2119
3203
multiprocessing_manager = multiprocessing.Manager()
2121
3205
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())
3207
client_class = functools.partial(ClientDBus, bus=bus)
3209
client_settings = Client.config_parser(client_config)
2143
3210
old_client_settings = {}
2146
# Get client data and settings from last running state.
3213
# This is used to redirect stdout and stderr for checker processes
3215
wnull = open(os.devnull, "w") # A writable /dev/null
3216
# Only used if server is running in foreground but not in debug
3218
if debug or not foreground:
3221
# Get client data and settings from last running state.
2147
3222
if server_settings["restore"]:
2149
3224
with open(stored_state_path, "rb") as stored_state:
2150
clients_data, old_client_settings = pickle.load(stored_state)
3225
if sys.version_info.major == 2:
3226
clients_data, old_client_settings = pickle.load(
3229
bytes_clients_data, bytes_old_client_settings = (
3230
pickle.load(stored_state, encoding="bytes"))
3231
# Fix bytes to strings
3234
clients_data = {(key.decode("utf-8")
3235
if isinstance(key, bytes)
3238
bytes_clients_data.items()}
3239
del bytes_clients_data
3240
for key in clients_data:
3241
value = {(k.decode("utf-8")
3242
if isinstance(k, bytes) else k): v
3244
clients_data[key].items()}
3245
clients_data[key] = value
3247
value["client_structure"] = [
3249
if isinstance(s, bytes)
3251
value["client_structure"]]
3253
for k in ("name", "host"):
3254
if isinstance(value[k], bytes):
3255
value[k] = value[k].decode("utf-8")
3256
if not value.has_key("key_id"):
3257
value["key_id"] = ""
3258
elif not value.has_key("fingerprint"):
3259
value["fingerprint"] = ""
3260
# old_client_settings
3262
old_client_settings = {
3263
(key.decode("utf-8")
3264
if isinstance(key, bytes)
3267
bytes_old_client_settings.items()}
3268
del bytes_old_client_settings
3270
for value in old_client_settings.values():
3271
if isinstance(value["host"], bytes):
3272
value["host"] = (value["host"]
2151
3274
os.remove(stored_state_path)
2152
3275
except IOError as e:
2153
logger.warning("Could not load persistant state: {0}".format(e))
2154
if e.errno != errno.ENOENT:
3276
if e.errno == errno.ENOENT:
3277
logger.warning("Could not load persistent state:"
3278
" {}".format(os.strerror(e.errno)))
3280
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():
3283
except EOFError as e:
3284
logger.warning("Could not load persistent state: "
3288
with PGPEngine() as pgp:
3289
for client_name, client in clients_data.items():
3290
# Skip removed clients
3291
if client_name not in client_settings:
3294
# Decide which value to use after restoring saved state.
3295
# We have three different values: Old config file,
3296
# new config file, and saved state.
3297
# New config value takes precedence if it differs from old
3298
# config value, otherwise use saved state.
3299
for name, value in client_settings[client_name].items():
3301
# For each value in new config, check if it
3302
# differs from the old config value (Except for
3303
# the "secret" attribute)
3304
if (name != "secret"
3306
old_client_settings[client_name][name])):
3307
client[name] = value
3311
# Clients who has passed its expire date can still be
3312
# enabled if its last checker was successful. A Client
3313
# whose checker succeeded before we stored its state is
3314
# assumed to have successfully run all checkers during
3316
if client["enabled"]:
3317
if datetime.datetime.utcnow() >= client["expires"]:
3318
if not client["last_checked_ok"]:
3320
"disabling client {} - Client never "
3321
"performed a successful checker".format(
3323
client["enabled"] = False
3324
elif client["last_checker_status"] != 0:
3326
"disabling client {} - Client last"
3327
" checker failed with error code"
3330
client["last_checker_status"]))
3331
client["enabled"] = False
3333
client["expires"] = (
3334
datetime.datetime.utcnow()
3335
+ client["timeout"])
3336
logger.debug("Last checker succeeded,"
3337
" 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,
3340
client["secret"] = pgp.decrypt(
3341
client["encrypted_secret"],
3342
client_settings[client_name]["secret"])
3344
# If decryption fails, we use secret from new settings
3345
logger.debug("Failed to decrypt {} old secret".format(
3347
client["secret"] = (client_settings[client_name]
3350
# Add/remove clients based on new changes made to config
3351
for client_name in (set(old_client_settings)
3352
- set(client_settings)):
3353
del clients_data[client_name]
3354
for client_name in (set(client_settings)
3355
- set(old_client_settings)):
3356
clients_data[client_name] = client_settings[client_name]
3358
# Create all client objects
3359
for client_name, client in clients_data.items():
3360
tcp_server.clients[client_name] = client_class(
3363
server_settings=server_settings)
2221
3365
if not tcp_server.clients:
2222
3366
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
3369
if pidfile is not None:
3373
print(pid, file=pidfile)
3375
logger.error("Could not write to file %r with PID %d",
2236
3378
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())
3380
for termsig in (signal.SIGHUP, signal.SIGTERM):
3381
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3382
lambda: main_loop.quit() and False)
2244
class MandosDBusService(dbus.service.Object):
3386
@alternate_dbus_interfaces(
3387
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3388
class MandosDBusService(DBusObjectWithObjectManager):
2245
3389
"""A D-Bus proxy object"""
2246
3391
def __init__(self):
2247
3392
dbus.service.Object.__init__(self, bus, "/")
2248
3394
_interface = "se.recompile.Mandos"
2250
3396
@dbus.service.signal(_interface, signature="o")
2251
3397
def ClientAdded(self, objpath):
2255
3401
@dbus.service.signal(_interface, signature="ss")
2256
def ClientNotFound(self, fingerprint, address):
3402
def ClientNotFound(self, key_id, address):
3406
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2260
3408
@dbus.service.signal(_interface, signature="os")
2261
3409
def ClientRemoved(self, objpath, name):
3413
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2265
3415
@dbus.service.method(_interface, out_signature="ao")
2266
3416
def GetAllClients(self):
2268
return dbus.Array(c.dbus_object_path
2270
tcp_server.clients.itervalues())
3418
return dbus.Array(c.dbus_object_path for c in
3419
tcp_server.clients.values())
3421
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2272
3423
@dbus.service.method(_interface,
2273
3424
out_signature="a{oa{sv}}")
2274
3425
def GetAllClientsWithProperties(self):
2276
3427
return dbus.Dictionary(
2277
((c.dbus_object_path, c.GetAll(""))
2278
for c in tcp_server.clients.itervalues()),
3428
{c.dbus_object_path: c.GetAll(
3429
"se.recompile.Mandos.Client")
3430
for c in tcp_server.clients.values()},
2279
3431
signature="oa{sv}")
2281
3433
@dbus.service.method(_interface, in_signature="o")
2282
3434
def RemoveClient(self, object_path):
2284
for c in tcp_server.clients.itervalues():
3436
for c in tcp_server.clients.values():
2285
3437
if c.dbus_object_path == object_path:
2286
3438
del tcp_server.clients[c.name]
2287
3439
c.remove_from_connection()
2288
# Don't signal anything except ClientRemoved
3440
# Don't signal the disabling
2289
3441
c.disable(quiet=True)
2291
self.ClientRemoved(object_path, c.name)
3442
# Emit D-Bus signal for removal
3443
self.client_removed_signal(c)
2293
3445
raise KeyError(object_path)
2297
class MandosDBusServiceTransitional(MandosDBusService):
2298
__metaclass__ = AlternateDBusNamesMetaclass
2299
mandos_dbus_service = MandosDBusServiceTransitional()
3449
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3450
out_signature="a{oa{sa{sv}}}")
3451
def GetManagedObjects(self):
3453
return dbus.Dictionary(
3454
{client.dbus_object_path:
3456
{interface: client.GetAll(interface)
3458
client._get_all_interface_names()})
3459
for client in tcp_server.clients.values()})
3461
def client_added_signal(self, client):
3462
"""Send the new standard signal and the old signal"""
3464
# New standard signal
3465
self.InterfacesAdded(
3466
client.dbus_object_path,
3468
{interface: client.GetAll(interface)
3470
client._get_all_interface_names()}))
3472
self.ClientAdded(client.dbus_object_path)
3474
def client_removed_signal(self, client):
3475
"""Send the new standard signal and the old signal"""
3477
# New standard signal
3478
self.InterfacesRemoved(
3479
client.dbus_object_path,
3480
client._get_all_interface_names())
3482
self.ClientRemoved(client.dbus_object_path,
3485
mandos_dbus_service = MandosDBusService()
3487
# Save modules to variables to exempt the modules from being
3488
# unloaded before the function registered with atexit() is run.
3489
mp = multiprocessing
2302
3493
"Cleanup function; run on exit"
2305
multiprocessing.active_children()
3497
mp.active_children()
2306
3499
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"]
3502
# Store client before exiting. Secrets are encrypted with key
3503
# based on what config file has. If config file is
3504
# removed/edited, old secret will thus be unrecovable.
3506
with PGPEngine() as pgp:
3507
for client in tcp_server.clients.values():
3508
key = client_settings[client.name]["secret"]
3509
client.encrypted_secret = pgp.encrypt(client.secret,
3513
# A list of attributes that can not be pickled
3515
exclude = {"bus", "changedstate", "secret",
3516
"checker", "server_settings"}
3517
for name, typ in inspect.getmembers(dbus.service
3521
client_dict["encrypted_secret"] = (client
3523
for attr in client.client_structure:
3524
if attr not in exclude:
3525
client_dict[attr] = getattr(client, attr)
3527
clients[client.name] = client_dict
3528
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:
3531
with tempfile.NamedTemporaryFile(
3535
dir=os.path.dirname(stored_state_path),
3536
delete=False) as stored_state:
3537
pickle.dump((clients, client_settings), stored_state,
3539
tempname = stored_state.name
3540
os.rename(tempname, stored_state_path)
3541
except (IOError, OSError) as e:
3547
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3548
logger.warning("Could not save persistent state: {}"
3549
.format(os.strerror(e.errno)))
3551
logger.warning("Could not save persistent state:",
2339
3555
# Delete all clients, and settings from config