70
import cPickle as pickle
63
import cPickle as pickle
73
64
import multiprocessing
85
67
import dbus.service
87
from gi.repository import GLib
88
70
from dbus.mainloop.glib import DBusGMainLoop
91
73
import xml.dom.minidom
94
if sys.version_info.major == 2:
98
# Add collections.abc.Callable if it does not exist
100
collections.abc.Callable
101
except AttributeError:
103
Callable = collections.Callable
104
collections.abc = abc
107
# Add shlex.quote if it does not exist
110
except AttributeError:
111
shlex.quote = re.escape
113
# Show warnings by default
114
if not sys.warnoptions:
116
warnings.simplefilter("default")
118
# Try to find the value of SO_BINDTODEVICE:
120
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
121
# newer, and it is also the most natural place for it:
122
77
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
123
78
except AttributeError:
125
# This is where SO_BINDTODEVICE was up to and including Python
127
80
from IN import SO_BINDTODEVICE
128
81
except ImportError:
129
# In Python 2.7 it seems to have been removed entirely.
130
# Try running the C preprocessor:
132
cc = subprocess.Popen(["cc", "--language=c", "-E",
134
stdin=subprocess.PIPE,
135
stdout=subprocess.PIPE)
136
stdout = cc.communicate(
137
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
138
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
139
except (OSError, ValueError, IndexError):
141
SO_BINDTODEVICE = None
143
if sys.version_info < (3, 2):
144
configparser.Configparser = configparser.SafeConfigParser
147
stored_state_file = "clients.pickle"
149
logger = logging.getLogger()
150
logging.captureWarnings(True) # Show warnings via the logging system
154
if_nametoindex = ctypes.cdll.LoadLibrary(
155
ctypes.util.find_library("c")).if_nametoindex
156
except (OSError, AttributeError):
158
def if_nametoindex(interface):
159
"Get an interface index the hard way, i.e. using fcntl()"
160
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
161
with contextlib.closing(socket.socket()) as s:
162
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
163
struct.pack(b"16s16x", interface))
164
interface_index = struct.unpack("I", ifreq[16:20])[0]
165
return interface_index
168
def copy_function(func):
169
"""Make a copy of a function"""
170
if sys.version_info.major == 2:
171
return types.FunctionType(func.func_code,
177
return types.FunctionType(func.__code__,
184
def initlogger(debug, level=logging.WARNING):
185
"""init logger and add loglevel"""
188
syslogger = (logging.handlers.SysLogHandler(
189
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
191
syslogger.setFormatter(logging.Formatter
192
("Mandos [%(process)d]: %(levelname)s:"
194
logger.addHandler(syslogger)
197
console = logging.StreamHandler()
198
console.setFormatter(logging.Formatter("%(asctime)s %(name)s"
202
logger.addHandler(console)
203
logger.setLevel(level)
206
class PGPError(Exception):
207
"""Exception if encryption/decryption fails"""
212
"""A simple class for OpenPGP symmetric encryption & decryption"""
215
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
218
output = subprocess.check_output(["gpgconf"])
219
for line in output.splitlines():
220
name, text, path = line.split(b":")
225
if e.errno != errno.ENOENT:
227
self.gnupgargs = ["--batch",
228
"--homedir", self.tempdir,
231
# Only GPG version 1 has the --no-use-agent option.
232
if self.gpg == b"gpg" or self.gpg.endswith(b"/gpg"):
233
self.gnupgargs.append("--no-use-agent")
238
def __exit__(self, exc_type, exc_value, traceback):
246
if self.tempdir is not None:
247
# Delete contents of tempdir
248
for root, dirs, files in os.walk(self.tempdir,
250
for filename in files:
251
os.remove(os.path.join(root, filename))
253
os.rmdir(os.path.join(root, dirname))
255
os.rmdir(self.tempdir)
258
def password_encode(self, password):
259
# Passphrase can not be empty and can not contain newlines or
260
# NUL bytes. So we prefix it and hex encode it.
261
encoded = b"mandos" + binascii.hexlify(password)
262
if len(encoded) > 2048:
263
# GnuPG can't handle long passwords, so encode differently
264
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
265
.replace(b"\n", b"\\n")
266
.replace(b"\0", b"\\x00"))
269
def encrypt(self, data, password):
270
passphrase = self.password_encode(password)
271
with tempfile.NamedTemporaryFile(
272
dir=self.tempdir) as passfile:
273
passfile.write(passphrase)
275
proc = subprocess.Popen([self.gpg, "--symmetric",
279
stdin=subprocess.PIPE,
280
stdout=subprocess.PIPE,
281
stderr=subprocess.PIPE)
282
ciphertext, err = proc.communicate(input=data)
283
if proc.returncode != 0:
287
def decrypt(self, data, password):
288
passphrase = self.password_encode(password)
289
with tempfile.NamedTemporaryFile(
290
dir=self.tempdir) as passfile:
291
passfile.write(passphrase)
293
proc = subprocess.Popen([self.gpg, "--decrypt",
297
stdin=subprocess.PIPE,
298
stdout=subprocess.PIPE,
299
stderr=subprocess.PIPE)
300
decrypted_plaintext, err = proc.communicate(input=data)
301
if proc.returncode != 0:
303
return decrypted_plaintext
306
# Pretend that we have an Avahi module
308
"""This isn't so much a class as it is a module-like namespace."""
309
IF_UNSPEC = -1 # avahi-common/address.h
310
PROTO_UNSPEC = -1 # avahi-common/address.h
311
PROTO_INET = 0 # avahi-common/address.h
312
PROTO_INET6 = 1 # avahi-common/address.h
313
DBUS_NAME = "org.freedesktop.Avahi"
314
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
315
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
316
DBUS_PATH_SERVER = "/"
319
def string_array_to_txt_array(t):
320
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
321
for s in t), signature="ay")
322
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
323
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
324
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
325
SERVER_INVALID = 0 # avahi-common/defs.h
326
SERVER_REGISTERING = 1 # avahi-common/defs.h
327
SERVER_RUNNING = 2 # avahi-common/defs.h
328
SERVER_COLLISION = 3 # avahi-common/defs.h
329
SERVER_FAILURE = 4 # avahi-common/defs.h
82
SO_BINDTODEVICE = None
87
#logger = logging.getLogger('mandos')
88
logger = logging.Logger('mandos')
89
syslogger = (logging.handlers.SysLogHandler
90
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
91
address = str("/dev/log")))
92
syslogger.setFormatter(logging.Formatter
93
('Mandos [%(process)d]: %(levelname)s:'
95
logger.addHandler(syslogger)
97
console = logging.StreamHandler()
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
101
logger.addHandler(console)
332
103
class AvahiError(Exception):
333
104
def __init__(self, value, *args, **kwargs):
334
105
self.value = value
335
return super(AvahiError, self).__init__(value, *args,
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
339
110
class AvahiServiceError(AvahiError):
343
113
class AvahiGroupError(AvahiError):
117
class AvahiService(object):
348
118
"""An Avahi (Zeroconf) service.
351
121
interface: integer; avahi.IF_UNSPEC or an interface index.
352
122
Used to optionally bind to the specified interface.
353
name: string; Example: "Mandos"
354
type: string; Example: "_mandos._tcp".
355
See <https://www.iana.org/assignments/service-names-port-numbers>
123
name: string; Example: 'Mandos'
124
type: string; Example: '_mandos._tcp'.
125
See <http://www.dns-sd.org/ServiceTypes.html>
356
126
port: integer; what port to announce
357
127
TXT: list of strings; TXT record for the service
358
128
domain: string; Domain to publish on, default to .local if empty.
517
260
follow_name_owner_changes=True),
518
261
avahi.DBUS_INTERFACE_SERVER)
519
262
self.server.connect_to_signal("StateChanged",
520
self.server_state_changed)
263
self.server_state_changed)
521
264
self.server_state_changed(self.server.GetState())
524
class AvahiServiceToSyslog(AvahiService):
525
def rename(self, *args, **kwargs):
526
"""Add the new name to the syslog messages"""
527
ret = super(AvahiServiceToSyslog, self).rename(*args,
529
syslogger.setFormatter(logging.Formatter(
530
"Mandos ({}) [%(process)d]: %(levelname)s: %(message)s"
535
# Pretend that we have a GnuTLS module
537
"""This isn't so much a class as it is a module-like namespace."""
539
library = ctypes.util.find_library("gnutls")
541
library = ctypes.util.find_library("gnutls-deb0")
542
_library = ctypes.cdll.LoadLibrary(library)
545
# Unless otherwise indicated, the constants and types below are
546
# all from the gnutls/gnutls.h C header file.
557
E_NO_CERTIFICATE_FOUND = -49
562
KEYID_USE_SHA256 = 1 # gnutls/x509.h
563
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
566
class _session_int(ctypes.Structure):
568
session_t = ctypes.POINTER(_session_int)
570
class certificate_credentials_st(ctypes.Structure):
572
certificate_credentials_t = ctypes.POINTER(
573
certificate_credentials_st)
574
certificate_type_t = ctypes.c_int
576
class datum_t(ctypes.Structure):
577
_fields_ = [("data", ctypes.POINTER(ctypes.c_ubyte)),
578
("size", ctypes.c_uint)]
580
class _openpgp_crt_int(ctypes.Structure):
582
openpgp_crt_t = ctypes.POINTER(_openpgp_crt_int)
583
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
584
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
585
credentials_type_t = ctypes.c_int
586
transport_ptr_t = ctypes.c_void_p
587
close_request_t = ctypes.c_int
590
class Error(Exception):
591
def __init__(self, message=None, code=None, args=()):
592
# Default usage is by a message string, but if a return
593
# code is passed, convert it to a string with
596
if message is None and code is not None:
597
message = gnutls.strerror(code).decode(
598
"utf-8", errors="replace")
599
return super(gnutls.Error, self).__init__(
602
class CertificateSecurityError(Error):
606
def __init__(self, cls):
609
def from_param(self, obj):
610
if not isinstance(obj, self.cls):
611
raise TypeError("Not of type {}: {!r}"
612
.format(self.cls.__name__, obj))
613
return ctypes.byref(obj.from_param(obj))
615
class CastToVoidPointer:
616
def __init__(self, cls):
619
def from_param(self, obj):
620
if not isinstance(obj, self.cls):
621
raise TypeError("Not of type {}: {!r}"
622
.format(self.cls.__name__, obj))
623
return ctypes.cast(obj.from_param(obj), ctypes.c_void_p)
625
class With_from_param:
627
def from_param(cls, obj):
628
return obj._as_parameter_
631
class Credentials(With_from_param):
633
self._as_parameter_ = gnutls.certificate_credentials_t()
634
gnutls.certificate_allocate_credentials(self)
635
self.type = gnutls.CRD_CERTIFICATE
638
gnutls.certificate_free_credentials(self)
640
class ClientSession(With_from_param):
641
def __init__(self, socket, credentials=None):
642
self._as_parameter_ = gnutls.session_t()
643
gnutls_flags = gnutls.CLIENT
644
if gnutls.check_version(b"3.5.6"):
645
gnutls_flags |= gnutls.NO_TICKETS
647
gnutls_flags |= gnutls.ENABLE_RAWPK
648
gnutls.init(self, gnutls_flags)
650
gnutls.set_default_priority(self)
651
gnutls.transport_set_ptr(self, socket.fileno())
652
gnutls.handshake_set_private_extensions(self, True)
654
if credentials is None:
655
credentials = gnutls.Credentials()
656
gnutls.credentials_set(self, credentials.type,
658
self.credentials = credentials
664
return gnutls.handshake(self)
666
def send(self, data):
670
data_len -= gnutls.record_send(self, data[-data_len:],
674
return gnutls.bye(self, gnutls.SHUT_RDWR)
676
# Error handling functions
677
def _error_code(result):
678
"""A function to raise exceptions on errors, suitable
679
for the "restype" attribute on ctypes functions"""
680
if result >= gnutls.E_SUCCESS:
682
if result == gnutls.E_NO_CERTIFICATE_FOUND:
683
raise gnutls.CertificateSecurityError(code=result)
684
raise gnutls.Error(code=result)
686
def _retry_on_error(result, func, arguments,
687
_error_code=_error_code):
688
"""A function to retry on some errors, suitable
689
for the "errcheck" attribute on ctypes functions"""
690
while result < gnutls.E_SUCCESS:
691
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
692
return _error_code(result)
693
result = func(*arguments)
696
# Unless otherwise indicated, the function declarations below are
697
# all from the gnutls/gnutls.h C header file.
700
priority_set_direct = _library.gnutls_priority_set_direct
701
priority_set_direct.argtypes = [ClientSession, ctypes.c_char_p,
702
ctypes.POINTER(ctypes.c_char_p)]
703
priority_set_direct.restype = _error_code
705
init = _library.gnutls_init
706
init.argtypes = [PointerTo(ClientSession), ctypes.c_int]
707
init.restype = _error_code
709
set_default_priority = _library.gnutls_set_default_priority
710
set_default_priority.argtypes = [ClientSession]
711
set_default_priority.restype = _error_code
713
record_send = _library.gnutls_record_send
714
record_send.argtypes = [ClientSession, ctypes.c_void_p,
716
record_send.restype = ctypes.c_ssize_t
717
record_send.errcheck = _retry_on_error
719
certificate_allocate_credentials = (
720
_library.gnutls_certificate_allocate_credentials)
721
certificate_allocate_credentials.argtypes = [
722
PointerTo(Credentials)]
723
certificate_allocate_credentials.restype = _error_code
725
certificate_free_credentials = (
726
_library.gnutls_certificate_free_credentials)
727
certificate_free_credentials.argtypes = [Credentials]
728
certificate_free_credentials.restype = None
730
handshake_set_private_extensions = (
731
_library.gnutls_handshake_set_private_extensions)
732
handshake_set_private_extensions.argtypes = [ClientSession,
734
handshake_set_private_extensions.restype = None
736
credentials_set = _library.gnutls_credentials_set
737
credentials_set.argtypes = [ClientSession, credentials_type_t,
738
CastToVoidPointer(Credentials)]
739
credentials_set.restype = _error_code
741
strerror = _library.gnutls_strerror
742
strerror.argtypes = [ctypes.c_int]
743
strerror.restype = ctypes.c_char_p
745
certificate_type_get = _library.gnutls_certificate_type_get
746
certificate_type_get.argtypes = [ClientSession]
747
certificate_type_get.restype = _error_code
749
certificate_get_peers = _library.gnutls_certificate_get_peers
750
certificate_get_peers.argtypes = [ClientSession,
751
ctypes.POINTER(ctypes.c_uint)]
752
certificate_get_peers.restype = ctypes.POINTER(datum_t)
754
global_set_log_level = _library.gnutls_global_set_log_level
755
global_set_log_level.argtypes = [ctypes.c_int]
756
global_set_log_level.restype = None
758
global_set_log_function = _library.gnutls_global_set_log_function
759
global_set_log_function.argtypes = [log_func]
760
global_set_log_function.restype = None
762
deinit = _library.gnutls_deinit
763
deinit.argtypes = [ClientSession]
764
deinit.restype = None
766
handshake = _library.gnutls_handshake
767
handshake.argtypes = [ClientSession]
768
handshake.restype = ctypes.c_int
769
handshake.errcheck = _retry_on_error
771
transport_set_ptr = _library.gnutls_transport_set_ptr
772
transport_set_ptr.argtypes = [ClientSession, transport_ptr_t]
773
transport_set_ptr.restype = None
775
bye = _library.gnutls_bye
776
bye.argtypes = [ClientSession, close_request_t]
777
bye.restype = ctypes.c_int
778
bye.errcheck = _retry_on_error
780
check_version = _library.gnutls_check_version
781
check_version.argtypes = [ctypes.c_char_p]
782
check_version.restype = ctypes.c_char_p
784
_need_version = b"3.3.0"
785
if check_version(_need_version) is None:
786
raise self.Error("Needs GnuTLS {} or later"
787
.format(_need_version))
789
_tls_rawpk_version = b"3.6.6"
790
has_rawpk = bool(check_version(_tls_rawpk_version))
794
class pubkey_st(ctypes.Structure):
796
pubkey_t = ctypes.POINTER(pubkey_st)
798
x509_crt_fmt_t = ctypes.c_int
800
# All the function declarations below are from
802
pubkey_init = _library.gnutls_pubkey_init
803
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
804
pubkey_init.restype = _error_code
806
pubkey_import = _library.gnutls_pubkey_import
807
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
809
pubkey_import.restype = _error_code
811
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
812
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
813
ctypes.POINTER(ctypes.c_ubyte),
814
ctypes.POINTER(ctypes.c_size_t)]
815
pubkey_get_key_id.restype = _error_code
817
pubkey_deinit = _library.gnutls_pubkey_deinit
818
pubkey_deinit.argtypes = [pubkey_t]
819
pubkey_deinit.restype = None
821
# All the function declarations below are from
824
openpgp_crt_init = _library.gnutls_openpgp_crt_init
825
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
826
openpgp_crt_init.restype = _error_code
828
openpgp_crt_import = _library.gnutls_openpgp_crt_import
829
openpgp_crt_import.argtypes = [openpgp_crt_t,
830
ctypes.POINTER(datum_t),
832
openpgp_crt_import.restype = _error_code
834
openpgp_crt_verify_self = \
835
_library.gnutls_openpgp_crt_verify_self
836
openpgp_crt_verify_self.argtypes = [
839
ctypes.POINTER(ctypes.c_uint),
841
openpgp_crt_verify_self.restype = _error_code
843
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
844
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
845
openpgp_crt_deinit.restype = None
847
openpgp_crt_get_fingerprint = (
848
_library.gnutls_openpgp_crt_get_fingerprint)
849
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
853
openpgp_crt_get_fingerprint.restype = _error_code
855
if check_version(b"3.6.4"):
856
certificate_type_get2 = _library.gnutls_certificate_type_get2
857
certificate_type_get2.argtypes = [ClientSession, ctypes.c_int]
858
certificate_type_get2.restype = _error_code
860
# Remove non-public functions
861
del _error_code, _retry_on_error
864
def call_pipe(connection, # : multiprocessing.Connection
865
func, *args, **kwargs):
866
"""This function is meant to be called by multiprocessing.Process
868
This function runs func(*args, **kwargs), and writes the resulting
869
return value on the provided multiprocessing.Connection.
871
connection.send(func(*args, **kwargs))
267
class Client(object):
876
268
"""A representation of a client host served by this server.
879
approved: bool(); None if not yet approved/disapproved
271
_approved: bool(); 'None' if not yet approved/disapproved
880
272
approval_delay: datetime.timedelta(); Time to wait for approval
881
273
approval_duration: datetime.timedelta(); Duration of one approval
882
checker: multiprocessing.Process(); a running checker process used
883
to see if the client lives. None if no process is
885
checker_callback_tag: a GLib event source tag, or None
274
checker: subprocess.Popen(); a running checker process used
275
to see if the client lives.
276
'None' if no process is running.
277
checker_callback_tag: a gobject event source tag, or None
886
278
checker_command: string; External command which is run to check
887
279
if client lives. %() expansions are done at
888
280
runtime with vars(self) as dict, so that for
889
281
instance %(name)s can be used in the command.
890
checker_initiator_tag: a GLib event source tag, or None
282
checker_initiator_tag: a gobject event source tag, or None
891
283
created: datetime.datetime(); (UTC) object creation
892
client_structure: Object describing what attributes a client has
893
and is used for storing the client at exit
894
284
current_checker_command: string; current running checker_command
895
disable_initiator_tag: a GLib event source tag, or None
285
disable_hook: If set, called by disable() as disable_hook(self)
286
disable_initiator_tag: a gobject event source tag, or None
897
288
fingerprint: string (40 or 32 hexadecimal digits); used to
898
uniquely identify an OpenPGP client
899
key_id: string (64 hexadecimal digits); used to uniquely identify
900
a client using raw public keys
289
uniquely identify the client
901
290
host: string; available for use by the checker command
902
291
interval: datetime.timedelta(); How often to start a new checker
903
292
last_approval_request: datetime.datetime(); (UTC) or None
904
293
last_checked_ok: datetime.datetime(); (UTC) or None
905
last_checker_status: integer between 0 and 255 reflecting exit
906
status of last checker. -1 reflects crashed
907
checker, -2 means no checker completed yet.
908
last_checker_signal: The signal which killed the last checker, if
909
last_checker_status is -1
910
last_enabled: datetime.datetime(); (UTC) or None
294
last_enabled: datetime.datetime(); (UTC)
911
295
name: string; from the config file, used in log messages and
912
296
D-Bus identifiers
913
297
secret: bytestring; sent verbatim (over TLS) to client
914
298
timeout: datetime.timedelta(); How long from last_checked_ok
915
299
until this client is disabled
916
extended_timeout: extra long timeout when secret has been sent
917
300
runtime_expansions: Allowed attributes for runtime expansion.
918
expires: datetime.datetime(); time (UTC) when a client will be
920
server_settings: The server_settings dict from main()
923
303
runtime_expansions = ("approval_delay", "approval_duration",
924
"created", "enabled", "expires", "key_id",
925
"fingerprint", "host", "interval",
926
"last_approval_request", "last_checked_ok",
304
"created", "enabled", "fingerprint",
305
"host", "interval", "last_checked_ok",
927
306
"last_enabled", "name", "timeout")
930
"extended_timeout": "PT15M",
932
"checker": "fping -q -- %%(host)s",
934
"approval_delay": "PT0S",
935
"approval_duration": "PT1S",
936
"approved_by_default": "True",
941
def config_parser(config):
942
"""Construct a new dict of client settings of this form:
943
{ client_name: {setting_name: value, ...}, ...}
944
with exceptions for any special settings as defined above.
945
NOTE: Must be a pure function. Must return the same result
946
value given the same arguments.
949
for client_name in config.sections():
950
section = dict(config.items(client_name))
951
client = settings[client_name] = {}
953
client["host"] = section["host"]
954
# Reformat values from string types to Python types
955
client["approved_by_default"] = config.getboolean(
956
client_name, "approved_by_default")
957
client["enabled"] = config.getboolean(client_name,
960
# Uppercase and remove spaces from key_id and fingerprint
961
# for later comparison purposes with return value from the
962
# key_id() and fingerprint() functions
963
client["key_id"] = (section.get("key_id", "").upper()
965
client["fingerprint"] = (section["fingerprint"].upper()
967
if "secret" in section:
968
client["secret"] = codecs.decode(section["secret"]
971
elif "secfile" in section:
972
with open(os.path.expanduser(os.path.expandvars
973
(section["secfile"])),
975
client["secret"] = secfile.read()
977
raise TypeError("No secret or secfile for section {}"
979
client["timeout"] = string_to_delta(section["timeout"])
980
client["extended_timeout"] = string_to_delta(
981
section["extended_timeout"])
982
client["interval"] = string_to_delta(section["interval"])
983
client["approval_delay"] = string_to_delta(
984
section["approval_delay"])
985
client["approval_duration"] = string_to_delta(
986
section["approval_duration"])
987
client["checker_command"] = section["checker"]
988
client["last_approval_request"] = None
989
client["last_checked_ok"] = None
990
client["last_checker_status"] = -2
994
def __init__(self, settings, name=None, server_settings=None):
309
def _timedelta_to_milliseconds(td):
310
"Convert a datetime.timedelta() to milliseconds"
311
return ((td.days * 24 * 60 * 60 * 1000)
312
+ (td.seconds * 1000)
313
+ (td.microseconds // 1000))
315
def timeout_milliseconds(self):
316
"Return the 'timeout' attribute in milliseconds"
317
return self._timedelta_to_milliseconds(self.timeout)
319
def interval_milliseconds(self):
320
"Return the 'interval' attribute in milliseconds"
321
return self._timedelta_to_milliseconds(self.interval)
323
def approval_delay_milliseconds(self):
324
return self._timedelta_to_milliseconds(self.approval_delay)
326
def __init__(self, name = None, disable_hook=None, config=None):
327
"""Note: the 'checker' key in 'config' sets the
328
'checker_command' attribute and *not* the 'checker'
996
if server_settings is None:
998
self.server_settings = server_settings
999
# adding all client settings
1000
for setting, value in settings.items():
1001
setattr(self, setting, value)
1004
if not hasattr(self, "last_enabled"):
1005
self.last_enabled = datetime.datetime.utcnow()
1006
if not hasattr(self, "expires"):
1007
self.expires = (datetime.datetime.utcnow()
1010
self.last_enabled = None
1013
333
logger.debug("Creating client %r", self.name)
1014
logger.debug(" Key ID: %s", self.key_id)
334
# Uppercase and remove spaces from fingerprint for later
335
# comparison purposes with return value from the fingerprint()
337
self.fingerprint = (config["fingerprint"].upper()
1015
339
logger.debug(" Fingerprint: %s", self.fingerprint)
1016
self.created = settings.get("created",
1017
datetime.datetime.utcnow())
1019
# attributes specific for this server instance
340
if "secret" in config:
341
self.secret = config["secret"].decode("base64")
342
elif "secfile" in config:
343
with open(os.path.expanduser(os.path.expandvars
344
(config["secfile"])),
346
self.secret = secfile.read()
348
raise TypeError("No secret or secfile for client %s"
350
self.host = config.get("host", "")
351
self.created = datetime.datetime.utcnow()
353
self.last_approval_request = None
354
self.last_enabled = None
355
self.last_checked_ok = None
356
self.timeout = string_to_delta(config["timeout"])
357
self.interval = string_to_delta(config["interval"])
358
self.disable_hook = disable_hook
1020
359
self.checker = None
1021
360
self.checker_initiator_tag = None
1022
361
self.disable_initiator_tag = None
1023
362
self.checker_callback_tag = None
363
self.checker_command = config["checker"]
1024
364
self.current_checker_command = None
1025
self.approved = None
365
self.last_connect = None
366
self._approved = None
367
self.approved_by_default = config.get("approved_by_default",
1026
369
self.approvals_pending = 0
1027
self.changedstate = multiprocessing_manager.Condition(
1028
multiprocessing_manager.Lock())
1029
self.client_structure = [attr
1030
for attr in self.__dict__.keys()
1031
if not attr.startswith("_")]
1032
self.client_structure.append("client_structure")
1034
for name, t in inspect.getmembers(
1035
type(self), lambda obj: isinstance(obj, property)):
1036
if not name.startswith("_"):
1037
self.client_structure.append(name)
1039
# Send notice to process children that client state has changed
370
self.approval_delay = string_to_delta(
371
config["approval_delay"])
372
self.approval_duration = string_to_delta(
373
config["approval_duration"])
374
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
1040
376
def send_changedstate(self):
1041
with self.changedstate:
1042
self.changedstate.notify_all()
377
self.changedstate.acquire()
378
self.changedstate.notify_all()
379
self.changedstate.release()
1044
381
def enable(self):
1045
382
"""Start this client's checker and timeout hooks"""
1046
383
if getattr(self, "enabled", False):
1047
384
# Already enabled
1049
self.expires = datetime.datetime.utcnow() + self.timeout
386
self.send_changedstate()
1051
387
self.last_enabled = datetime.datetime.utcnow()
1053
self.send_changedstate()
388
# Schedule a new checker to be started an 'interval' from now,
389
# and every interval from then on.
390
self.checker_initiator_tag = (gobject.timeout_add
391
(self.interval_milliseconds(),
393
# Schedule a disable() when 'timeout' has passed
394
self.disable_initiator_tag = (gobject.timeout_add
395
(self.timeout_milliseconds(),
398
# Also start a new checker *right now*.
1055
401
def disable(self, quiet=True):
1056
402
"""Disable this client."""
1057
403
if not getattr(self, "enabled", False):
406
self.send_changedstate()
1060
408
logger.info("Disabling client %s", self.name)
1061
if getattr(self, "disable_initiator_tag", None) is not None:
1062
GLib.source_remove(self.disable_initiator_tag)
409
if getattr(self, "disable_initiator_tag", False):
410
gobject.source_remove(self.disable_initiator_tag)
1063
411
self.disable_initiator_tag = None
1065
if getattr(self, "checker_initiator_tag", None) is not None:
1066
GLib.source_remove(self.checker_initiator_tag)
412
if getattr(self, "checker_initiator_tag", False):
413
gobject.source_remove(self.checker_initiator_tag)
1067
414
self.checker_initiator_tag = None
1068
415
self.stop_checker()
416
if self.disable_hook:
417
self.disable_hook(self)
1069
418
self.enabled = False
1071
self.send_changedstate()
1072
# Do not run this again if called by a GLib.timeout_add
419
# Do not run this again if called by a gobject.timeout_add
1075
422
def __del__(self):
423
self.disable_hook = None
1078
def init_checker(self):
1079
# Schedule a new checker to be started an 'interval' from now,
1080
# and every interval from then on.
1081
if self.checker_initiator_tag is not None:
1082
GLib.source_remove(self.checker_initiator_tag)
1083
self.checker_initiator_tag = GLib.timeout_add(
1084
random.randrange(int(self.interval.total_seconds() * 1000
1087
# Schedule a disable() when 'timeout' has passed
1088
if self.disable_initiator_tag is not None:
1089
GLib.source_remove(self.disable_initiator_tag)
1090
self.disable_initiator_tag = GLib.timeout_add(
1091
int(self.timeout.total_seconds() * 1000), self.disable)
1092
# Also start a new checker *right now*.
1093
self.start_checker()
1095
def checker_callback(self, source, condition, connection,
426
def checker_callback(self, pid, condition, command):
1097
427
"""The checker has completed, so take appropriate actions."""
1098
# Read return code from connection (see call_pipe)
1099
returncode = connection.recv()
1101
if self.checker is not None:
1103
428
self.checker_callback_tag = None
1104
429
self.checker = None
1107
self.last_checker_status = returncode
1108
self.last_checker_signal = None
1109
if self.last_checker_status == 0:
430
if os.WIFEXITED(condition):
431
exitstatus = os.WEXITSTATUS(condition)
1110
433
logger.info("Checker for %(name)s succeeded",
1112
435
self.checked_ok()
1114
logger.info("Checker for %(name)s failed", vars(self))
437
logger.info("Checker for %(name)s failed",
1116
self.last_checker_status = -1
1117
self.last_checker_signal = -returncode
1118
440
logger.warning("Checker for %(name)s crashed?",
1122
443
def checked_ok(self):
1123
"""Assert that the client has been seen, alive and well."""
444
"""Bump up the timeout for this client.
446
This should only be called when the client has been seen,
1124
449
self.last_checked_ok = datetime.datetime.utcnow()
1125
self.last_checker_status = 0
1126
self.last_checker_signal = None
1129
def bump_timeout(self, timeout=None):
1130
"""Bump up the timeout for this client."""
1132
timeout = self.timeout
1133
if self.disable_initiator_tag is not None:
1134
GLib.source_remove(self.disable_initiator_tag)
1135
self.disable_initiator_tag = None
1136
if getattr(self, "enabled", False):
1137
self.disable_initiator_tag = GLib.timeout_add(
1138
int(timeout.total_seconds() * 1000), self.disable)
1139
self.expires = datetime.datetime.utcnow() + timeout
450
gobject.source_remove(self.disable_initiator_tag)
451
self.disable_initiator_tag = (gobject.timeout_add
452
(self.timeout_milliseconds(),
1141
455
def need_approval(self):
1142
456
self.last_approval_request = datetime.datetime.utcnow()
1144
458
def start_checker(self):
1145
459
"""Start a new checker subprocess if one is not running.
1147
461
If a checker already exists, leave it running and do
1149
463
# The reason for not killing a running checker is that if we
1150
# did that, and if a checker (for some reason) started running
1151
# slowly and taking more than 'interval' time, then the client
1152
# would inevitably timeout, since no checker would get a
1153
# chance to run to completion. If we instead leave running
464
# did that, then if a checker (for some reason) started
465
# running slowly and taking more than 'interval' time, the
466
# client would inevitably timeout, since no checker would get
467
# a chance to run to completion. If we instead leave running
1154
468
# checkers alone, the checker would have to take more time
1155
469
# than 'timeout' for the client to be disabled, which is as it
1158
if self.checker is not None and not self.checker.is_alive():
1159
logger.warning("Checker was not alive; joining")
472
# If a checker exists, make sure it is not a zombie
474
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
475
except (AttributeError, OSError) as error:
476
if (isinstance(error, OSError)
477
and error.errno != errno.ECHILD):
481
logger.warning("Checker was a zombie")
482
gobject.source_remove(self.checker_callback_tag)
483
self.checker_callback(pid, status,
484
self.current_checker_command)
1162
485
# Start a new checker if needed
1163
486
if self.checker is None:
1164
# Escape attributes for the shell
1166
attr: shlex.quote(str(getattr(self, attr)))
1167
for attr in self.runtime_expansions}
1169
command = self.checker_command % escaped_attrs
1170
except TypeError as error:
1171
logger.error('Could not format string "%s"',
1172
self.checker_command,
1174
return True # Try again later
488
# In case checker_command has exactly one % operator
489
command = self.checker_command % self.host
491
# Escape attributes for the shell
492
escaped_attrs = dict(
494
re.escape(unicode(str(getattr(self, attr, "")),
498
self.runtime_expansions)
501
command = self.checker_command % escaped_attrs
502
except TypeError as error:
503
logger.error('Could not format string "%s":'
504
' %s', self.checker_command, error)
505
return True # Try again later
1175
506
self.current_checker_command = command
1176
logger.info("Starting checker %r for %s", command,
1178
# We don't need to redirect stdout and stderr, since
1179
# in normal mode, that is already done by daemon(),
1180
# and in debug mode we don't want to. (Stdin is
1181
# always replaced by /dev/null.)
1182
# The exception is when not debugging but nevertheless
1183
# running in the foreground; use the previously
1185
popen_args = {"close_fds": True,
1188
if (not self.server_settings["debug"]
1189
and self.server_settings["foreground"]):
1190
popen_args.update({"stdout": wnull,
1192
pipe = multiprocessing.Pipe(duplex=False)
1193
self.checker = multiprocessing.Process(
1195
args=(pipe[1], subprocess.call, command),
1197
self.checker.start()
1198
self.checker_callback_tag = GLib.io_add_watch(
1199
GLib.IOChannel.unix_new(pipe[0].fileno()),
1200
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
1201
self.checker_callback, pipe[0], command)
1202
# Re-run this periodically if run by GLib.timeout_add
508
logger.info("Starting checker %r for %s",
510
# We don't need to redirect stdout and stderr, since
511
# in normal mode, that is already done by daemon(),
512
# and in debug mode we don't want to. (Stdin is
513
# always replaced by /dev/null.)
514
self.checker = subprocess.Popen(command,
517
self.checker_callback_tag = (gobject.child_watch_add
519
self.checker_callback,
521
# The checker may have completed before the gobject
522
# watch was added. Check for this.
523
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
525
gobject.source_remove(self.checker_callback_tag)
526
self.checker_callback(pid, status, command)
527
except OSError as error:
528
logger.error("Failed to start subprocess: %s",
530
# Re-run this periodically if run by gobject.timeout_add
1205
533
def stop_checker(self):
1206
534
"""Force the checker process, if any, to stop."""
1207
535
if self.checker_callback_tag:
1208
GLib.source_remove(self.checker_callback_tag)
536
gobject.source_remove(self.checker_callback_tag)
1209
537
self.checker_callback_tag = None
1210
538
if getattr(self, "checker", None) is None:
1212
540
logger.debug("Stopping checker for %(name)s", vars(self))
1213
self.checker.terminate()
542
os.kill(self.checker.pid, signal.SIGTERM)
544
#if self.checker.poll() is None:
545
# os.kill(self.checker.pid, signal.SIGKILL)
546
except OSError as error:
547
if error.errno != errno.ESRCH: # No such process
1214
549
self.checker = None
1217
def dbus_service_property(dbus_interface,
551
def dbus_service_property(dbus_interface, signature="v",
552
access="readwrite", byte_arrays=False):
1221
553
"""Decorators for marking methods of a DBusObjectWithProperties to
1222
554
become properties on the D-Bus.
1224
556
The decorated method will be called with no arguments by "Get"
1225
557
and with one argument by "Set".
1227
559
The parameters, where they are supported, are the same as
1228
560
dbus.service.method, except there is only "signature", since the
1229
561
type from Get() and the type sent to Set() is the same.
1561
733
except (AttributeError, xml.dom.DOMException,
1562
734
xml.parsers.expat.ExpatError) as error:
1563
735
logger.error("Failed to override Introspection method",
1569
dbus.OBJECT_MANAGER_IFACE
1570
except AttributeError:
1571
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1574
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1575
"""A D-Bus object with an ObjectManager.
1577
Classes inheriting from this exposes the standard
1578
GetManagedObjects call and the InterfacesAdded and
1579
InterfacesRemoved signals on the standard
1580
"org.freedesktop.DBus.ObjectManager" interface.
1582
Note: No signals are sent automatically; they must be sent
1585
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1586
out_signature="a{oa{sa{sv}}}")
1587
def GetManagedObjects(self):
1588
"""This function must be overridden"""
1589
raise NotImplementedError()
1591
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1592
signature="oa{sa{sv}}")
1593
def InterfacesAdded(self, object_path, interfaces_and_properties):
1596
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1597
def InterfacesRemoved(self, object_path, interfaces):
1600
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1602
path_keyword="object_path",
1603
connection_keyword="connection")
1604
def Introspect(self, object_path, connection):
1605
"""Overloading of standard D-Bus method.
1607
Override return argument name of GetManagedObjects to be
1608
"objpath_interfaces_and_properties"
1610
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1614
document = xml.dom.minidom.parseString(xmlstring)
1616
for if_tag in document.getElementsByTagName("interface"):
1617
# Fix argument name for the GetManagedObjects method
1618
if (if_tag.getAttribute("name")
1619
== dbus.OBJECT_MANAGER_IFACE):
1620
for cn in if_tag.getElementsByTagName("method"):
1621
if (cn.getAttribute("name")
1622
== "GetManagedObjects"):
1623
for arg in cn.getElementsByTagName("arg"):
1624
if (arg.getAttribute("direction")
1628
"objpath_interfaces"
1630
xmlstring = document.toxml("utf-8")
1632
except (AttributeError, xml.dom.DOMException,
1633
xml.parsers.expat.ExpatError) as error:
1634
logger.error("Failed to override Introspection method",
1639
def datetime_to_dbus(dt, variant_level=0):
1640
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1642
return dbus.String("", variant_level=variant_level)
1643
return dbus.String(dt.isoformat(), variant_level=variant_level)
1646
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1647
"""A class decorator; applied to a subclass of
1648
dbus.service.Object, it will add alternate D-Bus attributes with
1649
interface names according to the "alt_interface_names" mapping.
1652
@alternate_dbus_interfaces({"org.example.Interface":
1653
"net.example.AlternateInterface"})
1654
class SampleDBusObject(dbus.service.Object):
1655
@dbus.service.method("org.example.Interface")
1656
def SampleDBusMethod():
1659
The above "SampleDBusMethod" on "SampleDBusObject" will be
1660
reachable via two interfaces: "org.example.Interface" and
1661
"net.example.AlternateInterface", the latter of which will have
1662
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1663
"true", unless "deprecate" is passed with a False value.
1665
This works for methods and signals, and also for D-Bus properties
1666
(from DBusObjectWithProperties) and interfaces (from the
1667
dbus_interface_annotations decorator).
1671
for orig_interface_name, alt_interface_name in (
1672
alt_interface_names.items()):
1674
interface_names = set()
1675
# Go though all attributes of the class
1676
for attrname, attribute in inspect.getmembers(cls):
1677
# Ignore non-D-Bus attributes, and D-Bus attributes
1678
# with the wrong interface name
1679
if (not hasattr(attribute, "_dbus_interface")
1680
or not attribute._dbus_interface.startswith(
1681
orig_interface_name)):
1683
# Create an alternate D-Bus interface name based on
1685
alt_interface = attribute._dbus_interface.replace(
1686
orig_interface_name, alt_interface_name)
1687
interface_names.add(alt_interface)
1688
# Is this a D-Bus signal?
1689
if getattr(attribute, "_dbus_is_signal", False):
1690
# Extract the original non-method undecorated
1691
# function by black magic
1692
if sys.version_info.major == 2:
1693
nonmethod_func = (dict(
1694
zip(attribute.func_code.co_freevars,
1695
attribute.__closure__))
1696
["func"].cell_contents)
1698
nonmethod_func = (dict(
1699
zip(attribute.__code__.co_freevars,
1700
attribute.__closure__))
1701
["func"].cell_contents)
1702
# Create a new, but exactly alike, function
1703
# object, and decorate it to be a new D-Bus signal
1704
# with the alternate D-Bus interface name
1705
new_function = copy_function(nonmethod_func)
1706
new_function = (dbus.service.signal(
1708
attribute._dbus_signature)(new_function))
1709
# Copy annotations, if any
1711
new_function._dbus_annotations = dict(
1712
attribute._dbus_annotations)
1713
except AttributeError:
1716
# Define a creator of a function to call both the
1717
# original and alternate functions, so both the
1718
# original and alternate signals gets sent when
1719
# the function is called
1720
def fixscope(func1, func2):
1721
"""This function is a scope container to pass
1722
func1 and func2 to the "call_both" function
1723
outside of its arguments"""
1725
@functools.wraps(func2)
1726
def call_both(*args, **kwargs):
1727
"""This function will emit two D-Bus
1728
signals by calling func1 and func2"""
1729
func1(*args, **kwargs)
1730
func2(*args, **kwargs)
1731
# Make wrapper function look like a D-Bus
1733
for name, attr in inspect.getmembers(func2):
1734
if name.startswith("_dbus_"):
1735
setattr(call_both, name, attr)
1738
# Create the "call_both" function and add it to
1740
attr[attrname] = fixscope(attribute, new_function)
1741
# Is this a D-Bus method?
1742
elif getattr(attribute, "_dbus_is_method", False):
1743
# Create a new, but exactly alike, function
1744
# object. Decorate it to be a new D-Bus method
1745
# with the alternate D-Bus interface name. Add it
1748
dbus.service.method(
1750
attribute._dbus_in_signature,
1751
attribute._dbus_out_signature)
1752
(copy_function(attribute)))
1753
# Copy annotations, if any
1755
attr[attrname]._dbus_annotations = dict(
1756
attribute._dbus_annotations)
1757
except AttributeError:
1759
# Is this a D-Bus property?
1760
elif getattr(attribute, "_dbus_is_property", False):
1761
# Create a new, but exactly alike, function
1762
# object, and decorate it to be a new D-Bus
1763
# property with the alternate D-Bus interface
1764
# name. Add it to the class.
1765
attr[attrname] = (dbus_service_property(
1766
alt_interface, attribute._dbus_signature,
1767
attribute._dbus_access,
1768
attribute._dbus_get_args_options
1770
(copy_function(attribute)))
1771
# Copy annotations, if any
1773
attr[attrname]._dbus_annotations = dict(
1774
attribute._dbus_annotations)
1775
except AttributeError:
1777
# Is this a D-Bus interface?
1778
elif getattr(attribute, "_dbus_is_interface", False):
1779
# Create a new, but exactly alike, function
1780
# object. Decorate it to be a new D-Bus interface
1781
# with the alternate D-Bus interface name. Add it
1784
dbus_interface_annotations(alt_interface)
1785
(copy_function(attribute)))
1787
# Deprecate all alternate interfaces
1788
iname = "_AlternateDBusNames_interface_annotation{}"
1789
for interface_name in interface_names:
1791
@dbus_interface_annotations(interface_name)
1793
return {"org.freedesktop.DBus.Deprecated":
1795
# Find an unused name
1796
for aname in (iname.format(i)
1797
for i in itertools.count()):
1798
if aname not in attr:
1802
# Replace the class with a new subclass of it with
1803
# methods, signals, etc. as created above.
1804
if sys.version_info.major == 2:
1805
cls = type(b"{}Alternate".format(cls.__name__),
1808
cls = type("{}Alternate".format(cls.__name__),
1815
@alternate_dbus_interfaces({"se.recompile.Mandos":
1816
"se.bsnet.fukt.Mandos"})
1817
740
class ClientDBus(Client, DBusObjectWithProperties):
1818
741
"""A Client class using D-Bus
1821
744
dbus_object_path: dbus.ObjectPath
1822
745
bus: dbus.SystemBus()
1825
748
runtime_expansions = (Client.runtime_expansions
1826
+ ("dbus_object_path", ))
1828
_interface = "se.recompile.Mandos.Client"
749
+ ("dbus_object_path",))
1830
751
# dbus.service.Object doesn't use super(), so we can't either.
1832
def __init__(self, bus=None, *args, **kwargs):
753
def __init__(self, bus = None, *args, **kwargs):
754
self._approvals_pending = 0
1834
756
Client.__init__(self, *args, **kwargs)
1835
757
# Only now, when this client is initialized, can it show up on
1837
client_object_name = str(self.name).translate(
759
client_object_name = unicode(self.name).translate(
1838
760
{ord("."): ord("_"),
1839
761
ord("-"): ord("_")})
1840
self.dbus_object_path = dbus.ObjectPath(
1841
"/clients/" + client_object_name)
762
self.dbus_object_path = (dbus.ObjectPath
763
("/clients/" + client_object_name))
1842
764
DBusObjectWithProperties.__init__(self, self.bus,
1843
765
self.dbus_object_path)
1845
def notifychangeproperty(transform_func, dbus_name,
1846
type_func=lambda x: x,
1848
invalidate_only=False,
1849
_interface=_interface):
1850
""" Modify a variable so that it's a property which announces
1851
its changes to DBus.
1853
transform_fun: Function that takes a value and a variant_level
1854
and transforms it to a D-Bus type.
1855
dbus_name: D-Bus name of the variable
1856
type_func: Function that transform the value before sending it
1857
to the D-Bus. Default: no transform
1858
variant_level: D-Bus variant level. Default: 1
1860
attrname = "_{}".format(dbus_name)
1862
def setter(self, value):
1863
if hasattr(self, "dbus_object_path"):
1864
if (not hasattr(self, attrname) or
1865
type_func(getattr(self, attrname, None))
1866
!= type_func(value)):
1868
self.PropertiesChanged(
1869
_interface, dbus.Dictionary(),
1870
dbus.Array((dbus_name, )))
1872
dbus_value = transform_func(
1874
variant_level=variant_level)
1875
self.PropertyChanged(dbus.String(dbus_name),
1877
self.PropertiesChanged(
1879
dbus.Dictionary({dbus.String(dbus_name):
1882
setattr(self, attrname, value)
1884
return property(lambda self: getattr(self, attrname), setter)
1886
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1887
approvals_pending = notifychangeproperty(dbus.Boolean,
1890
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1891
last_enabled = notifychangeproperty(datetime_to_dbus,
1893
checker = notifychangeproperty(
1894
dbus.Boolean, "CheckerRunning",
1895
type_func=lambda checker: checker is not None)
1896
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1898
last_checker_status = notifychangeproperty(dbus.Int16,
1899
"LastCheckerStatus")
1900
last_approval_request = notifychangeproperty(
1901
datetime_to_dbus, "LastApprovalRequest")
1902
approved_by_default = notifychangeproperty(dbus.Boolean,
1903
"ApprovedByDefault")
1904
approval_delay = notifychangeproperty(
1905
dbus.UInt64, "ApprovalDelay",
1906
type_func=lambda td: td.total_seconds() * 1000)
1907
approval_duration = notifychangeproperty(
1908
dbus.UInt64, "ApprovalDuration",
1909
type_func=lambda td: td.total_seconds() * 1000)
1910
host = notifychangeproperty(dbus.String, "Host")
1911
timeout = notifychangeproperty(
1912
dbus.UInt64, "Timeout",
1913
type_func=lambda td: td.total_seconds() * 1000)
1914
extended_timeout = notifychangeproperty(
1915
dbus.UInt64, "ExtendedTimeout",
1916
type_func=lambda td: td.total_seconds() * 1000)
1917
interval = notifychangeproperty(
1918
dbus.UInt64, "Interval",
1919
type_func=lambda td: td.total_seconds() * 1000)
1920
checker_command = notifychangeproperty(dbus.String, "Checker")
1921
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1922
invalidate_only=True)
1924
del notifychangeproperty
767
def _get_approvals_pending(self):
768
return self._approvals_pending
769
def _set_approvals_pending(self, value):
770
old_value = self._approvals_pending
771
self._approvals_pending = value
773
if (hasattr(self, "dbus_object_path")
774
and bval is not bool(old_value)):
775
dbus_bool = dbus.Boolean(bval, variant_level=1)
776
self.PropertyChanged(dbus.String("ApprovalPending"),
779
approvals_pending = property(_get_approvals_pending,
780
_set_approvals_pending)
781
del _get_approvals_pending, _set_approvals_pending
784
def _datetime_to_dbus(dt, variant_level=0):
785
"""Convert a UTC datetime.datetime() to a D-Bus type."""
786
return dbus.String(dt.isoformat(),
787
variant_level=variant_level)
790
oldstate = getattr(self, "enabled", False)
791
r = Client.enable(self)
792
if oldstate != self.enabled:
794
self.PropertyChanged(dbus.String("Enabled"),
795
dbus.Boolean(True, variant_level=1))
796
self.PropertyChanged(
797
dbus.String("LastEnabled"),
798
self._datetime_to_dbus(self.last_enabled,
802
def disable(self, quiet = False):
803
oldstate = getattr(self, "enabled", False)
804
r = Client.disable(self, quiet=quiet)
805
if not quiet and oldstate != self.enabled:
807
self.PropertyChanged(dbus.String("Enabled"),
808
dbus.Boolean(False, variant_level=1))
1926
811
def __del__(self, *args, **kwargs):
1928
813
self.remove_from_connection()
2428
1316
delay -= time2 - time
2431
session.send(client.secret)
2432
except gnutls.Error as error:
2433
logger.warning("gnutls send failed",
1319
while sent_size < len(client.secret):
1321
sent = session.send(client.secret[sent_size:])
1322
except gnutls.errors.GNUTLSError as error:
1323
logger.warning("gnutls send failed")
1325
logger.debug("Sent: %d, remaining: %d",
1326
sent, len(client.secret)
1327
- (sent_size + sent))
2437
1330
logger.info("Sending secret to %s", client.name)
2438
# bump the timeout using extended_timeout
2439
client.bump_timeout(client.extended_timeout)
1331
# bump the timeout as if seen
2440
1333
if self.server.use_dbus:
2441
1334
# Emit D-Bus signal
2442
1335
client.GotSecret()
2445
1338
if approval_required:
2446
1339
client.approvals_pending -= 1
2449
except gnutls.Error as error:
2450
logger.warning("GnuTLS bye failed",
1342
except gnutls.errors.GNUTLSError as error:
1343
logger.warning("GnuTLS bye failed")
2454
1346
def peer_certificate(session):
2455
"Return the peer's certificate as a bytestring"
2457
cert_type = gnutls.certificate_type_get2(
2458
session, gnutls.CTYPE_PEERS)
2459
except AttributeError:
2460
cert_type = gnutls.certificate_type_get(session)
2461
if gnutls.has_rawpk:
2462
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2464
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2465
# If not a valid certificate type...
2466
if cert_type not in valid_cert_types:
2467
logger.info("Cert type %r not in %r", cert_type,
2469
# ...return invalid data
1347
"Return the peer's OpenPGP certificate as a bytestring"
1348
# If not an OpenPGP certificate...
1349
if (gnutls.library.functions
1350
.gnutls_certificate_type_get(session._c_object)
1351
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1352
# ...do the normal thing
1353
return session.peer_certificate
2471
1354
list_size = ctypes.c_uint(1)
2472
cert_list = (gnutls.certificate_get_peers
2473
(session, ctypes.byref(list_size)))
1355
cert_list = (gnutls.library.functions
1356
.gnutls_certificate_get_peers
1357
(session._c_object, ctypes.byref(list_size)))
2474
1358
if not bool(cert_list) and list_size.value != 0:
2475
raise gnutls.Error("error getting peer certificate")
1359
raise gnutls.errors.GNUTLSError("error getting peer"
2476
1361
if list_size.value == 0:
2478
1363
cert = cert_list[0]
2479
1364
return ctypes.string_at(cert.data, cert.size)
2482
def key_id(certificate):
2483
"Convert a certificate bytestring to a hexdigit key ID"
2484
# New GnuTLS "datum" with the public key
2485
datum = gnutls.datum_t(
2486
ctypes.cast(ctypes.c_char_p(certificate),
2487
ctypes.POINTER(ctypes.c_ubyte)),
2488
ctypes.c_uint(len(certificate)))
2489
# XXX all these need to be created in the gnutls "module"
2490
# New empty GnuTLS certificate
2491
pubkey = gnutls.pubkey_t()
2492
gnutls.pubkey_init(ctypes.byref(pubkey))
2493
# Import the raw public key into the certificate
2494
gnutls.pubkey_import(pubkey,
2495
ctypes.byref(datum),
2496
gnutls.X509_FMT_DER)
2497
# New buffer for the key ID
2498
buf = ctypes.create_string_buffer(32)
2499
buf_len = ctypes.c_size_t(len(buf))
2500
# Get the key ID from the raw public key into the buffer
2501
gnutls.pubkey_get_key_id(
2503
gnutls.KEYID_USE_SHA256,
2504
ctypes.cast(ctypes.byref(buf),
2505
ctypes.POINTER(ctypes.c_ubyte)),
2506
ctypes.byref(buf_len))
2507
# Deinit the certificate
2508
gnutls.pubkey_deinit(pubkey)
2510
# Convert the buffer to a Python bytestring
2511
key_id = ctypes.string_at(buf, buf_len.value)
2512
# Convert the bytestring to hexadecimal notation
2513
hex_key_id = binascii.hexlify(key_id).upper()
2517
1367
def fingerprint(openpgp):
2518
1368
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2519
1369
# New GnuTLS "datum" with the OpenPGP public key
2520
datum = gnutls.datum_t(
2521
ctypes.cast(ctypes.c_char_p(openpgp),
2522
ctypes.POINTER(ctypes.c_ubyte)),
2523
ctypes.c_uint(len(openpgp)))
1370
datum = (gnutls.library.types
1371
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1374
ctypes.c_uint(len(openpgp))))
2524
1375
# New empty GnuTLS certificate
2525
crt = gnutls.openpgp_crt_t()
2526
gnutls.openpgp_crt_init(ctypes.byref(crt))
1376
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1377
(gnutls.library.functions
1378
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2527
1379
# Import the OpenPGP public key into the certificate
2528
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2529
gnutls.OPENPGP_FMT_RAW)
1380
(gnutls.library.functions
1381
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1382
gnutls.library.constants
1383
.GNUTLS_OPENPGP_FMT_RAW))
2530
1384
# Verify the self signature in the key
2531
1385
crtverify = ctypes.c_uint()
2532
gnutls.openpgp_crt_verify_self(crt, 0,
2533
ctypes.byref(crtverify))
1386
(gnutls.library.functions
1387
.gnutls_openpgp_crt_verify_self(crt, 0,
1388
ctypes.byref(crtverify)))
2534
1389
if crtverify.value != 0:
2535
gnutls.openpgp_crt_deinit(crt)
2536
raise gnutls.CertificateSecurityError(code
1390
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1391
raise (gnutls.errors.CertificateSecurityError
2538
1393
# New buffer for the fingerprint
2539
1394
buf = ctypes.create_string_buffer(20)
2540
1395
buf_len = ctypes.c_size_t()
2541
1396
# Get the fingerprint from the certificate into the buffer
2542
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2543
ctypes.byref(buf_len))
1397
(gnutls.library.functions
1398
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1399
ctypes.byref(buf_len)))
2544
1400
# Deinit the certificate
2545
gnutls.openpgp_crt_deinit(crt)
1401
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2546
1402
# Convert the buffer to a Python bytestring
2547
1403
fpr = ctypes.string_at(buf, buf_len.value)
2548
1404
# Convert the bytestring to hexadecimal notation
2549
hex_fpr = binascii.hexlify(fpr).upper()
1405
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2553
class MultiprocessingMixIn:
1409
class MultiprocessingMixIn(object):
2554
1410
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2556
1411
def sub_process_main(self, request, address):
2558
1413
self.finish_request(request, address)
2560
1415
self.handle_error(request, address)
2561
1416
self.close_request(request)
2563
1418
def process_request(self, request, address):
2564
1419
"""Start a new process to process the request."""
2565
proc = multiprocessing.Process(target=self.sub_process_main,
2566
args=(request, address))
2571
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
1420
multiprocessing.Process(target = self.sub_process_main,
1421
args = (request, address)).start()
1423
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2572
1424
""" adds a pipe to the MixIn """
2574
1425
def process_request(self, request, client_address):
2575
1426
"""Overrides and wraps the original process_request().
2577
1428
This function creates a new pipe in self.pipe
2579
1430
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2581
proc = MultiprocessingMixIn.process_request(self, request,
1432
super(MultiprocessingMixInWithPipe,
1433
self).process_request(request, client_address)
2583
1434
self.child_pipe.close()
2584
self.add_pipe(parent_pipe, proc)
1435
self.add_pipe(parent_pipe)
2586
def add_pipe(self, parent_pipe, proc):
1437
def add_pipe(self, parent_pipe):
2587
1438
"""Dummy function; override as necessary"""
2588
raise NotImplementedError()
1439
raise NotImplementedError
2591
1441
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2592
socketserver.TCPServer):
2593
"""IPv6-capable TCP server. Accepts None as address and/or port
1442
socketserver.TCPServer, object):
1443
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2596
1446
enabled: Boolean; whether this server is activated yet
2597
1447
interface: None or a network interface name (string)
2598
1448
use_ipv6: Boolean; to use IPv6 or not
2601
1450
def __init__(self, server_address, RequestHandlerClass,
2605
"""If socketfd is set, use that file descriptor instead of
2606
creating a new one with socket.socket().
1451
interface=None, use_ipv6=True):
2608
1452
self.interface = interface
2610
1454
self.address_family = socket.AF_INET6
2611
if socketfd is not None:
2612
# Save the file descriptor
2613
self.socketfd = socketfd
2614
# Save the original socket.socket() function
2615
self.socket_socket = socket.socket
2617
# To implement --socket, we monkey patch socket.socket.
2619
# (When socketserver.TCPServer is a new-style class, we
2620
# could make self.socket into a property instead of monkey
2621
# patching socket.socket.)
2623
# Create a one-time-only replacement for socket.socket()
2624
@functools.wraps(socket.socket)
2625
def socket_wrapper(*args, **kwargs):
2626
# Restore original function so subsequent calls are
2628
socket.socket = self.socket_socket
2629
del self.socket_socket
2630
# This time only, return a new socket object from the
2631
# saved file descriptor.
2632
return socket.fromfd(self.socketfd, *args, **kwargs)
2633
# Replace socket.socket() function with wrapper
2634
socket.socket = socket_wrapper
2635
# The socketserver.TCPServer.__init__ will call
2636
# socket.socket(), which might be our replacement,
2637
# socket_wrapper(), if socketfd was set.
2638
1455
socketserver.TCPServer.__init__(self, server_address,
2639
1456
RequestHandlerClass)
2641
1457
def server_bind(self):
2642
1458
"""This overrides the normal server_bind() function
2643
1459
to bind to an interface if one was specified, and also NOT to
2644
1460
bind to an address or port if they were not specified."""
2645
global SO_BINDTODEVICE
2646
1461
if self.interface is not None:
2647
1462
if SO_BINDTODEVICE is None:
2648
# Fall back to a hard-coded value which seems to be
2650
logger.warning("SO_BINDTODEVICE not found, trying 25")
2651
SO_BINDTODEVICE = 25
2653
self.socket.setsockopt(
2654
socket.SOL_SOCKET, SO_BINDTODEVICE,
2655
(self.interface + "\0").encode("utf-8"))
2656
except socket.error as error:
2657
if error.errno == errno.EPERM:
2658
logger.error("No permission to bind to"
2659
" interface %s", self.interface)
2660
elif error.errno == errno.ENOPROTOOPT:
2661
logger.error("SO_BINDTODEVICE not available;"
2662
" cannot bind to interface %s",
2664
elif error.errno == errno.ENODEV:
2665
logger.error("Interface %s does not exist,"
2666
" cannot bind", self.interface)
1463
logger.error("SO_BINDTODEVICE does not exist;"
1464
" cannot bind to interface %s",
1468
self.socket.setsockopt(socket.SOL_SOCKET,
1472
except socket.error as error:
1473
if error[0] == errno.EPERM:
1474
logger.error("No permission to"
1475
" bind to interface %s",
1477
elif error[0] == errno.ENOPROTOOPT:
1478
logger.error("SO_BINDTODEVICE not available;"
1479
" cannot bind to interface %s",
2669
1483
# Only bind(2) the socket if we really need to.
2670
1484
if self.server_address[0] or self.server_address[1]:
2671
if self.server_address[1]:
2672
self.allow_reuse_address = True
2673
1485
if not self.server_address[0]:
2674
1486
if self.address_family == socket.AF_INET6:
2675
any_address = "::" # in6addr_any
1487
any_address = "::" # in6addr_any
2677
any_address = "0.0.0.0" # INADDR_ANY
1489
any_address = socket.INADDR_ANY
2678
1490
self.server_address = (any_address,
2679
1491
self.server_address[1])
2680
1492
elif not self.server_address[1]:
2681
self.server_address = (self.server_address[0], 0)
1493
self.server_address = (self.server_address[0],
2682
1495
# if self.interface:
2683
1496
# self.server_address = (self.server_address[0],
3014
1728
parser.add_argument("--no-dbus", action="store_false",
3015
1729
dest="use_dbus", help="Do not provide D-Bus"
3016
" system bus interface", default=None)
1730
" system bus interface")
3017
1731
parser.add_argument("--no-ipv6", action="store_false",
3018
dest="use_ipv6", help="Do not use IPv6",
3020
parser.add_argument("--no-restore", action="store_false",
3021
dest="restore", help="Do not restore stored"
3022
" state", default=None)
3023
parser.add_argument("--socket", type=int,
3024
help="Specify a file descriptor to a network"
3025
" socket to use instead of creating one")
3026
parser.add_argument("--statedir", metavar="DIR",
3027
help="Directory to save/restore state in")
3028
parser.add_argument("--foreground", action="store_true",
3029
help="Run in foreground", default=None)
3030
parser.add_argument("--no-zeroconf", action="store_false",
3031
dest="zeroconf", help="Do not use Zeroconf",
1732
dest="use_ipv6", help="Do not use IPv6")
3034
1733
options = parser.parse_args()
3036
1740
# Default values for config file for server-global settings
3037
if gnutls.has_rawpk:
3038
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
3039
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
3041
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
3042
":+SIGN-DSA-SHA256")
3043
server_defaults = {"interface": "",
3047
"priority": priority,
3048
"servicename": "Mandos",
3054
"statedir": "/var/lib/mandos",
3055
"foreground": "False",
1741
server_defaults = { "interface": "",
1746
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1747
"servicename": "Mandos",
3060
1753
# Parse config file for server-global settings
3061
server_config = configparser.ConfigParser(server_defaults)
1754
server_config = configparser.SafeConfigParser(server_defaults)
3062
1755
del server_defaults
3063
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3064
# Convert the ConfigParser object to a dict
1756
server_config.read(os.path.join(options.configdir,
1758
# Convert the SafeConfigParser object to a dict
3065
1759
server_settings = server_config.defaults()
3066
1760
# Use the appropriate methods on the non-string config options
3067
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3068
"foreground", "zeroconf"):
1761
for option in ("debug", "use_dbus", "use_ipv6"):
3069
1762
server_settings[option] = server_config.getboolean("DEFAULT",
3071
1764
if server_settings["port"]:
3072
1765
server_settings["port"] = server_config.getint("DEFAULT",
3074
if server_settings["socket"]:
3075
server_settings["socket"] = server_config.getint("DEFAULT",
3077
# Later, stdin will, and stdout and stderr might, be dup'ed
3078
# over with an opened os.devnull. But we don't want this to
3079
# happen with a supplied network socket.
3080
if 0 <= server_settings["socket"] <= 2:
3081
server_settings["socket"] = os.dup(server_settings
3083
1767
del server_config
3085
1769
# Override the settings from the config file with command line
3086
1770
# options, if set.
3087
1771
for option in ("interface", "address", "port", "debug",
3088
"priority", "servicename", "configdir", "use_dbus",
3089
"use_ipv6", "debuglevel", "restore", "statedir",
3090
"socket", "foreground", "zeroconf"):
1772
"priority", "servicename", "configdir",
1773
"use_dbus", "use_ipv6", "debuglevel"):
3091
1774
value = getattr(options, option)
3092
1775
if value is not None:
3093
1776
server_settings[option] = value
3095
1778
# Force all strings to be unicode
3096
1779
for option in server_settings.keys():
3097
if isinstance(server_settings[option], bytes):
3098
server_settings[option] = (server_settings[option]
3100
# Force all boolean options to be boolean
3101
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3102
"foreground", "zeroconf"):
3103
server_settings[option] = bool(server_settings[option])
3104
# Debug implies foreground
3105
if server_settings["debug"]:
3106
server_settings["foreground"] = True
1780
if type(server_settings[option]) is str:
1781
server_settings[option] = unicode(server_settings[option])
3107
1782
# Now we have our good server settings in "server_settings"
3109
1784
##################################################################
3111
if (not server_settings["zeroconf"]
3112
and not (server_settings["port"]
3113
or server_settings["socket"] != "")):
3114
parser.error("Needs port or socket to work without Zeroconf")
3116
1786
# For convenience
3117
1787
debug = server_settings["debug"]
3118
1788
debuglevel = server_settings["debuglevel"]
3119
1789
use_dbus = server_settings["use_dbus"]
3120
1790
use_ipv6 = server_settings["use_ipv6"]
3121
stored_state_path = os.path.join(server_settings["statedir"],
3123
foreground = server_settings["foreground"]
3124
zeroconf = server_settings["zeroconf"]
3127
initlogger(debug, logging.DEBUG)
3132
level = getattr(logging, debuglevel.upper())
3133
initlogger(debug, level)
3135
1792
if server_settings["servicename"] != "Mandos":
3136
syslogger.setFormatter(
3137
logging.Formatter("Mandos ({}) [%(process)d]:"
3138
" %(levelname)s: %(message)s".format(
3139
server_settings["servicename"])))
1793
syslogger.setFormatter(logging.Formatter
1794
('Mandos (%s) [%%(process)d]:'
1795
' %%(levelname)s: %%(message)s'
1796
% server_settings["servicename"]))
3141
1798
# Parse config file with clients
3142
client_config = configparser.ConfigParser(Client.client_defaults)
1799
client_defaults = { "timeout": "1h",
1801
"checker": "fping -q -- %%(host)s",
1803
"approval_delay": "0s",
1804
"approval_duration": "1s",
1806
client_config = configparser.SafeConfigParser(client_defaults)
3143
1807
client_config.read(os.path.join(server_settings["configdir"],
3144
1808
"clients.conf"))
3146
1810
global mandos_dbus_service
3147
1811
mandos_dbus_service = None
3150
if server_settings["socket"] != "":
3151
socketfd = server_settings["socket"]
3152
tcp_server = MandosServer(
3153
(server_settings["address"], server_settings["port"]),
3155
interface=(server_settings["interface"] or None),
3157
gnutls_priority=server_settings["priority"],
3161
pidfilename = "/run/mandos.pid"
3162
if not os.path.isdir("/run/."):
3163
pidfilename = "/var/run/mandos.pid"
3166
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3167
except IOError as e:
3168
logger.error("Could not open file %r", pidfilename,
3171
for name, group in (("_mandos", "_mandos"),
3172
("mandos", "mandos"),
3173
("nobody", "nogroup")):
3175
uid = pwd.getpwnam(name).pw_uid
3176
gid = pwd.getpwnam(group).pw_gid
1813
tcp_server = MandosServer((server_settings["address"],
1814
server_settings["port"]),
1816
interface=(server_settings["interface"]
1820
server_settings["priority"],
1823
pidfilename = "/var/run/mandos.pid"
1825
pidfile = open(pidfilename, "w")
1827
logger.error("Could not open file %r", pidfilename)
1830
uid = pwd.getpwnam("_mandos").pw_uid
1831
gid = pwd.getpwnam("_mandos").pw_gid
1834
uid = pwd.getpwnam("mandos").pw_uid
1835
gid = pwd.getpwnam("mandos").pw_gid
3178
1836
except KeyError:
1838
uid = pwd.getpwnam("nobody").pw_uid
1839
gid = pwd.getpwnam("nobody").pw_gid
3187
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3189
1846
except OSError as error:
3190
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3191
.format(uid, gid, os.strerror(error.errno)))
3192
if error.errno != errno.EPERM:
1847
if error[0] != errno.EPERM:
1850
if not debug and not debuglevel:
1851
syslogger.setLevel(logging.WARNING)
1852
console.setLevel(logging.WARNING)
1854
level = getattr(logging, debuglevel.upper())
1855
syslogger.setLevel(level)
1856
console.setLevel(level)
3196
1859
# Enable all possible GnuTLS debugging
3198
1861
# "Use a log level over 10 to enable all debugging options."
3199
1862
# - GnuTLS manual
3200
gnutls.global_set_log_level(11)
1863
gnutls.library.functions.gnutls_global_set_log_level(11)
1865
@gnutls.library.types.gnutls_log_func
3203
1866
def debug_gnutls(level, string):
3204
logger.debug("GnuTLS: %s",
3205
string[:-1].decode("utf-8",
3208
gnutls.global_set_log_function(debug_gnutls)
1867
logger.debug("GnuTLS: %s", string[:-1])
1869
(gnutls.library.functions
1870
.gnutls_global_set_log_function(debug_gnutls))
3210
1872
# Redirect stdin so all checkers get /dev/null
3211
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1873
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3212
1874
os.dup2(null, sys.stdin.fileno())
1878
# No console logging
1879
logger.removeHandler(console)
3216
1881
# Need to fork before connecting to D-Bus
3218
1883
# Close all input and output, do double fork, etc.
3221
if gi.version_info < (3, 10, 2):
3222
# multiprocessing will use threads, so before we use GLib we
3223
# need to inform GLib that threads will be used.
3226
1886
global main_loop
3227
1887
# From the Avahi example code
3228
DBusGMainLoop(set_as_default=True)
3229
main_loop = GLib.MainLoop()
1888
DBusGMainLoop(set_as_default=True )
1889
main_loop = gobject.MainLoop()
3230
1890
bus = dbus.SystemBus()
3231
1891
# End of Avahi example code
3234
bus_name = dbus.service.BusName("se.recompile.Mandos",
3237
old_bus_name = dbus.service.BusName(
3238
"se.bsnet.fukt.Mandos", bus,
3240
except dbus.exceptions.DBusException as e:
3241
logger.error("Disabling D-Bus:", exc_info=e)
1894
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1895
bus, do_not_queue=True)
1896
except dbus.exceptions.NameExistsException as e:
1897
logger.error(unicode(e) + ", disabling D-Bus")
3242
1898
use_dbus = False
3243
1899
server_settings["use_dbus"] = False
3244
1900
tcp_server.use_dbus = False
3246
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3247
service = AvahiServiceToSyslog(
3248
name=server_settings["servicename"],
3249
servicetype="_mandos._tcp",
3252
if server_settings["interface"]:
3253
service.interface = if_nametoindex(
3254
server_settings["interface"].encode("utf-8"))
1901
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1902
service = AvahiService(name = server_settings["servicename"],
1903
servicetype = "_mandos._tcp",
1904
protocol = protocol, bus = bus)
1905
if server_settings["interface"]:
1906
service.interface = (if_nametoindex
1907
(str(server_settings["interface"])))
3256
1909
global multiprocessing_manager
3257
1910
multiprocessing_manager = multiprocessing.Manager()
3259
1912
client_class = Client
3261
client_class = functools.partial(ClientDBus, bus=bus)
3263
client_settings = Client.config_parser(client_config)
3264
old_client_settings = {}
3267
# This is used to redirect stdout and stderr for checker processes
3269
wnull = open(os.devnull, "w") # A writable /dev/null
3270
# Only used if server is running in foreground but not in debug
3272
if debug or not foreground:
3275
# Get client data and settings from last running state.
3276
if server_settings["restore"]:
3278
with open(stored_state_path, "rb") as stored_state:
3279
if sys.version_info.major == 2:
3280
clients_data, old_client_settings = pickle.load(
3283
bytes_clients_data, bytes_old_client_settings = (
3284
pickle.load(stored_state, encoding="bytes"))
3285
# Fix bytes to strings
3288
clients_data = {(key.decode("utf-8")
3289
if isinstance(key, bytes)
3292
bytes_clients_data.items()}
3293
del bytes_clients_data
3294
for key in clients_data:
3295
value = {(k.decode("utf-8")
3296
if isinstance(k, bytes) else k): v
3298
clients_data[key].items()}
3299
clients_data[key] = value
3301
value["client_structure"] = [
3303
if isinstance(s, bytes)
3305
value["client_structure"]]
3306
# .name, .host, and .checker_command
3307
for k in ("name", "host", "checker_command"):
3308
if isinstance(value[k], bytes):
3309
value[k] = value[k].decode("utf-8")
3310
if "key_id" not in value:
3311
value["key_id"] = ""
3312
elif "fingerprint" not in value:
3313
value["fingerprint"] = ""
3314
# old_client_settings
3316
old_client_settings = {
3317
(key.decode("utf-8")
3318
if isinstance(key, bytes)
3321
bytes_old_client_settings.items()}
3322
del bytes_old_client_settings
3323
# .host and .checker_command
3324
for value in old_client_settings.values():
3325
for attribute in ("host", "checker_command"):
3326
if isinstance(value[attribute], bytes):
3327
value[attribute] = (value[attribute]
3329
os.remove(stored_state_path)
3330
except IOError as e:
3331
if e.errno == errno.ENOENT:
3332
logger.warning("Could not load persistent state:"
3333
" {}".format(os.strerror(e.errno)))
3335
logger.critical("Could not load persistent state:",
3338
except EOFError as e:
3339
logger.warning("Could not load persistent state: "
3343
with PGPEngine() as pgp:
3344
for client_name, client in clients_data.items():
3345
# Skip removed clients
3346
if client_name not in client_settings:
3349
# Decide which value to use after restoring saved state.
3350
# We have three different values: Old config file,
3351
# new config file, and saved state.
3352
# New config value takes precedence if it differs from old
3353
# config value, otherwise use saved state.
3354
for name, value in client_settings[client_name].items():
3356
# For each value in new config, check if it
3357
# differs from the old config value (Except for
3358
# the "secret" attribute)
3359
if (name != "secret"
3361
old_client_settings[client_name][name])):
3362
client[name] = value
3366
# Clients who has passed its expire date can still be
3367
# enabled if its last checker was successful. A Client
3368
# whose checker succeeded before we stored its state is
3369
# assumed to have successfully run all checkers during
3371
if client["enabled"]:
3372
if datetime.datetime.utcnow() >= client["expires"]:
3373
if not client["last_checked_ok"]:
3375
"disabling client {} - Client never "
3376
"performed a successful checker".format(
3378
client["enabled"] = False
3379
elif client["last_checker_status"] != 0:
3381
"disabling client {} - Client last"
3382
" checker failed with error code"
3385
client["last_checker_status"]))
3386
client["enabled"] = False
3388
client["expires"] = (
3389
datetime.datetime.utcnow()
3390
+ client["timeout"])
3391
logger.debug("Last checker succeeded,"
3392
" keeping {} enabled".format(
1914
client_class = functools.partial(ClientDBus, bus = bus)
1915
def client_config_items(config, section):
1916
special_settings = {
1917
"approved_by_default":
1918
lambda: config.getboolean(section,
1919
"approved_by_default"),
1921
for name, value in config.items(section):
3395
client["secret"] = pgp.decrypt(
3396
client["encrypted_secret"],
3397
client_settings[client_name]["secret"])
3399
# If decryption fails, we use secret from new settings
3400
logger.debug("Failed to decrypt {} old secret".format(
3402
client["secret"] = (client_settings[client_name]
3405
# Add/remove clients based on new changes made to config
3406
for client_name in (set(old_client_settings)
3407
- set(client_settings)):
3408
del clients_data[client_name]
3409
for client_name in (set(client_settings)
3410
- set(old_client_settings)):
3411
clients_data[client_name] = client_settings[client_name]
3413
# Create all client objects
3414
for client_name, client in clients_data.items():
3415
tcp_server.clients[client_name] = client_class(
3418
server_settings=server_settings)
1923
yield (name, special_settings[name]())
1927
tcp_server.clients.update(set(
1928
client_class(name = section,
1929
config= dict(client_config_items(
1930
client_config, section)))
1931
for section in client_config.sections()))
3420
1932
if not tcp_server.clients:
3421
1933
logger.warning("No clients defined")
3424
if pidfile is not None:
3428
print(pid, file=pidfile)
3430
logger.error("Could not write to file %r with PID %d",
1939
pidfile.write(str(pid) + "\n".encode("utf-8"))
1942
logger.error("Could not write to file %r with PID %d",
1945
# "pidfile" was never created
3433
1947
del pidfilename
3435
for termsig in (signal.SIGHUP, signal.SIGTERM):
3436
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3437
lambda: main_loop.quit() and False)
1949
signal.signal(signal.SIGINT, signal.SIG_IGN)
1951
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1952
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3441
@alternate_dbus_interfaces(
3442
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3443
class MandosDBusService(DBusObjectWithObjectManager):
1955
class MandosDBusService(dbus.service.Object):
3444
1956
"""A D-Bus proxy object"""
3446
1957
def __init__(self):
3447
1958
dbus.service.Object.__init__(self, bus, "/")
3449
_interface = "se.recompile.Mandos"
1959
_interface = "se.bsnet.fukt.Mandos"
3451
1961
@dbus.service.signal(_interface, signature="o")
3452
1962
def ClientAdded(self, objpath):
3456
1966
@dbus.service.signal(_interface, signature="ss")
3457
def ClientNotFound(self, key_id, address):
1967
def ClientNotFound(self, fingerprint, address):
3461
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3463
1971
@dbus.service.signal(_interface, signature="os")
3464
1972
def ClientRemoved(self, objpath, name):
3468
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3470
1976
@dbus.service.method(_interface, out_signature="ao")
3471
1977
def GetAllClients(self):
3473
return dbus.Array(c.dbus_object_path for c in
3474
tcp_server.clients.values())
3476
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
1979
return dbus.Array(c.dbus_object_path
1980
for c in tcp_server.clients)
3478
1982
@dbus.service.method(_interface,
3479
1983
out_signature="a{oa{sv}}")
3480
1984
def GetAllClientsWithProperties(self):
3482
1986
return dbus.Dictionary(
3483
{c.dbus_object_path: c.GetAll(
3484
"se.recompile.Mandos.Client")
3485
for c in tcp_server.clients.values()},
1987
((c.dbus_object_path, c.GetAll(""))
1988
for c in tcp_server.clients),
3486
1989
signature="oa{sv}")
3488
1991
@dbus.service.method(_interface, in_signature="o")
3489
1992
def RemoveClient(self, object_path):
3491
for c in tcp_server.clients.values():
1994
for c in tcp_server.clients:
3492
1995
if c.dbus_object_path == object_path:
3493
del tcp_server.clients[c.name]
1996
tcp_server.clients.remove(c)
3494
1997
c.remove_from_connection()
3495
# Don't signal the disabling
1998
# Don't signal anything except ClientRemoved
3496
1999
c.disable(quiet=True)
3497
# Emit D-Bus signal for removal
3498
self.client_removed_signal(c)
2001
self.ClientRemoved(object_path, c.name)
3500
2003
raise KeyError(object_path)
3504
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3505
out_signature="a{oa{sa{sv}}}")
3506
def GetManagedObjects(self):
3508
return dbus.Dictionary(
3509
{client.dbus_object_path:
3511
{interface: client.GetAll(interface)
3513
client._get_all_interface_names()})
3514
for client in tcp_server.clients.values()})
3516
def client_added_signal(self, client):
3517
"""Send the new standard signal and the old signal"""
3519
# New standard signal
3520
self.InterfacesAdded(
3521
client.dbus_object_path,
3523
{interface: client.GetAll(interface)
3525
client._get_all_interface_names()}))
3527
self.ClientAdded(client.dbus_object_path)
3529
def client_removed_signal(self, client):
3530
"""Send the new standard signal and the old signal"""
3532
# New standard signal
3533
self.InterfacesRemoved(
3534
client.dbus_object_path,
3535
client._get_all_interface_names())
3537
self.ClientRemoved(client.dbus_object_path,
3540
2007
mandos_dbus_service = MandosDBusService()
3542
# Save modules to variables to exempt the modules from being
3543
# unloaded before the function registered with atexit() is run.
3544
mp = multiprocessing
3548
2010
"Cleanup function; run on exit"
3552
mp.active_children()
3554
if not (tcp_server.clients or client_settings):
3557
# Store client before exiting. Secrets are encrypted with key
3558
# based on what config file has. If config file is
3559
# removed/edited, old secret will thus be unrecovable.
3561
with PGPEngine() as pgp:
3562
for client in tcp_server.clients.values():
3563
key = client_settings[client.name]["secret"]
3564
client.encrypted_secret = pgp.encrypt(client.secret,
3568
# A list of attributes that can not be pickled
3570
exclude = {"bus", "changedstate", "secret",
3571
"checker", "server_settings"}
3572
for name, typ in inspect.getmembers(dbus.service
3576
client_dict["encrypted_secret"] = (client
3578
for attr in client.client_structure:
3579
if attr not in exclude:
3580
client_dict[attr] = getattr(client, attr)
3582
clients[client.name] = client_dict
3583
del client_settings[client.name]["secret"]
3586
with tempfile.NamedTemporaryFile(
3590
dir=os.path.dirname(stored_state_path),
3591
delete=False) as stored_state:
3592
pickle.dump((clients, client_settings), stored_state,
3594
tempname = stored_state.name
3595
os.rename(tempname, stored_state_path)
3596
except (IOError, OSError) as e:
3602
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3603
logger.warning("Could not save persistent state: {}"
3604
.format(os.strerror(e.errno)))
3606
logger.warning("Could not save persistent state:",
3610
# Delete all clients, and settings from config
3611
2013
while tcp_server.clients:
3612
name, client = tcp_server.clients.popitem()
2014
client = tcp_server.clients.pop()
3614
2016
client.remove_from_connection()
3615
# Don't signal the disabling
2017
client.disable_hook = None
2018
# Don't signal anything except ClientRemoved
3616
2019
client.disable(quiet=True)
3617
# Emit D-Bus signal for removal
3619
mandos_dbus_service.client_removed_signal(client)
3620
client_settings.clear()
2022
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
3622
2025
atexit.register(cleanup)
3624
for client in tcp_server.clients.values():
2027
for client in tcp_server.clients:
3626
# Emit D-Bus signal for adding
3627
mandos_dbus_service.client_added_signal(client)
3628
# Need to initiate checking of clients
3630
client.init_checker()
2030
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3632
2033
tcp_server.enable()
3633
2034
tcp_server.server_activate()
3635
2036
# Find out what port we got
3637
service.port = tcp_server.socket.getsockname()[1]
2037
service.port = tcp_server.socket.getsockname()[1]
3639
2039
logger.info("Now listening on address %r, port %d,"
3640
" flowinfo %d, scope_id %d",
3641
*tcp_server.socket.getsockname())
2040
" flowinfo %d, scope_id %d"
2041
% tcp_server.socket.getsockname())
3643
logger.info("Now listening on address %r, port %d",
3644
*tcp_server.socket.getsockname())
3646
# service.interface = tcp_server.socket.getsockname()[3]
2043
logger.info("Now listening on address %r, port %d"
2044
% tcp_server.socket.getsockname())
2046
#service.interface = tcp_server.socket.getsockname()[3]
3650
# From the Avahi example code
3653
except dbus.exceptions.DBusException as error:
3654
logger.critical("D-Bus Exception", exc_info=error)
3657
# End of Avahi example code
3660
GLib.IOChannel.unix_new(tcp_server.fileno()),
3661
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
3662
lambda *args, **kwargs: (tcp_server.handle_request
3663
(*args[2:], **kwargs) or True))
2049
# From the Avahi example code
2052
except dbus.exceptions.DBusException as error:
2053
logger.critical("DBusException: %s", error)
2056
# End of Avahi example code
2058
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2059
lambda *args, **kwargs:
2060
(tcp_server.handle_request
2061
(*args[2:], **kwargs) or True))
3665
2063
logger.debug("Starting main loop")
3666
2064
main_loop.run()
3667
2065
except AvahiError as error:
3668
logger.critical("Avahi Error", exc_info=error)
2066
logger.critical("AvahiError: %s", error)
3671
2069
except KeyboardInterrupt: