70
import cPickle as pickle
63
import cPickle as pickle
73
64
import multiprocessing
83
67
import dbus.service
85
from gi.repository import GLib
86
70
from dbus.mainloop.glib import DBusGMainLoop
89
73
import xml.dom.minidom
92
if sys.version_info.major == 2:
95
# Show warnings by default
96
if not sys.warnoptions:
98
warnings.simplefilter("default")
100
# Try to find the value of SO_BINDTODEVICE:
102
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
103
# newer, and it is also the most natural place for it:
104
77
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
105
78
except AttributeError:
107
# This is where SO_BINDTODEVICE was up to and including Python
109
80
from IN import SO_BINDTODEVICE
110
81
except ImportError:
111
# In Python 2.7 it seems to have been removed entirely.
112
# Try running the C preprocessor:
114
cc = subprocess.Popen(["cc", "--language=c", "-E",
116
stdin=subprocess.PIPE,
117
stdout=subprocess.PIPE)
118
stdout = cc.communicate(
119
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
120
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
121
except (OSError, ValueError, IndexError):
123
SO_BINDTODEVICE = None
125
if sys.version_info.major == 2:
128
if sys.version_info < (3, 2):
129
configparser.Configparser = configparser.SafeConfigParser
132
stored_state_file = "clients.pickle"
134
logger = logging.getLogger()
135
logging.captureWarnings(True) # Show warnings via the logging system
139
if_nametoindex = ctypes.cdll.LoadLibrary(
140
ctypes.util.find_library("c")).if_nametoindex
141
except (OSError, AttributeError):
143
def if_nametoindex(interface):
144
"Get an interface index the hard way, i.e. using fcntl()"
145
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
146
with contextlib.closing(socket.socket()) as s:
147
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
148
struct.pack(b"16s16x", interface))
149
interface_index = struct.unpack("I", ifreq[16:20])[0]
150
return interface_index
153
def copy_function(func):
154
"""Make a copy of a function"""
155
if sys.version_info.major == 2:
156
return types.FunctionType(func.func_code,
162
return types.FunctionType(func.__code__,
169
def initlogger(debug, level=logging.WARNING):
170
"""init logger and add loglevel"""
173
syslogger = (logging.handlers.SysLogHandler(
174
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
176
syslogger.setFormatter(logging.Formatter
177
('Mandos [%(process)d]: %(levelname)s:'
179
logger.addHandler(syslogger)
182
console = logging.StreamHandler()
183
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
187
logger.addHandler(console)
188
logger.setLevel(level)
191
class PGPError(Exception):
192
"""Exception if encryption/decryption fails"""
197
"""A simple class for OpenPGP symmetric encryption & decryption"""
200
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
203
output = subprocess.check_output(["gpgconf"])
204
for line in output.splitlines():
205
name, text, path = line.split(b":")
210
if e.errno != errno.ENOENT:
212
self.gnupgargs = ['--batch',
213
'--homedir', self.tempdir,
216
# Only GPG version 1 has the --no-use-agent option.
217
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
218
self.gnupgargs.append("--no-use-agent")
223
def __exit__(self, exc_type, exc_value, traceback):
231
if self.tempdir is not None:
232
# Delete contents of tempdir
233
for root, dirs, files in os.walk(self.tempdir,
235
for filename in files:
236
os.remove(os.path.join(root, filename))
238
os.rmdir(os.path.join(root, dirname))
240
os.rmdir(self.tempdir)
243
def password_encode(self, password):
244
# Passphrase can not be empty and can not contain newlines or
245
# NUL bytes. So we prefix it and hex encode it.
246
encoded = b"mandos" + binascii.hexlify(password)
247
if len(encoded) > 2048:
248
# GnuPG can't handle long passwords, so encode differently
249
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
250
.replace(b"\n", b"\\n")
251
.replace(b"\0", b"\\x00"))
254
def encrypt(self, data, password):
255
passphrase = self.password_encode(password)
256
with tempfile.NamedTemporaryFile(
257
dir=self.tempdir) as passfile:
258
passfile.write(passphrase)
260
proc = subprocess.Popen([self.gpg, '--symmetric',
264
stdin=subprocess.PIPE,
265
stdout=subprocess.PIPE,
266
stderr=subprocess.PIPE)
267
ciphertext, err = proc.communicate(input=data)
268
if proc.returncode != 0:
272
def decrypt(self, data, password):
273
passphrase = self.password_encode(password)
274
with tempfile.NamedTemporaryFile(
275
dir=self.tempdir) as passfile:
276
passfile.write(passphrase)
278
proc = subprocess.Popen([self.gpg, '--decrypt',
282
stdin=subprocess.PIPE,
283
stdout=subprocess.PIPE,
284
stderr=subprocess.PIPE)
285
decrypted_plaintext, err = proc.communicate(input=data)
286
if proc.returncode != 0:
288
return decrypted_plaintext
291
# Pretend that we have an Avahi module
293
"""This isn't so much a class as it is a module-like namespace."""
294
IF_UNSPEC = -1 # avahi-common/address.h
295
PROTO_UNSPEC = -1 # avahi-common/address.h
296
PROTO_INET = 0 # avahi-common/address.h
297
PROTO_INET6 = 1 # avahi-common/address.h
298
DBUS_NAME = "org.freedesktop.Avahi"
299
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
300
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
301
DBUS_PATH_SERVER = "/"
304
def string_array_to_txt_array(t):
305
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
306
for s in t), signature="ay")
307
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
308
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
309
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
310
SERVER_INVALID = 0 # avahi-common/defs.h
311
SERVER_REGISTERING = 1 # avahi-common/defs.h
312
SERVER_RUNNING = 2 # avahi-common/defs.h
313
SERVER_COLLISION = 3 # avahi-common/defs.h
314
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)
317
103
class AvahiError(Exception):
318
104
def __init__(self, value, *args, **kwargs):
319
105
self.value = value
320
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))
324
110
class AvahiServiceError(AvahiError):
328
113
class AvahiGroupError(AvahiError):
117
class AvahiService(object):
333
118
"""An Avahi (Zeroconf) service.
336
121
interface: integer; avahi.IF_UNSPEC or an interface index.
337
122
Used to optionally bind to the specified interface.
338
123
name: string; Example: 'Mandos'
339
124
type: string; Example: '_mandos._tcp'.
340
See <https://www.iana.org/assignments/service-names-port-numbers>
125
See <http://www.dns-sd.org/ServiceTypes.html>
341
126
port: integer; what port to announce
342
127
TXT: list of strings; TXT record for the service
343
128
domain: string; Domain to publish on, default to .local if empty.
502
260
follow_name_owner_changes=True),
503
261
avahi.DBUS_INTERFACE_SERVER)
504
262
self.server.connect_to_signal("StateChanged",
505
self.server_state_changed)
263
self.server_state_changed)
506
264
self.server_state_changed(self.server.GetState())
509
class AvahiServiceToSyslog(AvahiService):
510
def rename(self, *args, **kwargs):
511
"""Add the new name to the syslog messages"""
512
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
513
syslogger.setFormatter(logging.Formatter(
514
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
519
# Pretend that we have a GnuTLS module
521
"""This isn't so much a class as it is a module-like namespace."""
523
library = ctypes.util.find_library("gnutls")
525
library = ctypes.util.find_library("gnutls-deb0")
526
_library = ctypes.cdll.LoadLibrary(library)
529
# Unless otherwise indicated, the constants and types below are
530
# all from the gnutls/gnutls.h C header file.
541
E_NO_CERTIFICATE_FOUND = -49
546
KEYID_USE_SHA256 = 1 # gnutls/x509.h
547
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
550
class session_int(ctypes.Structure):
552
session_t = ctypes.POINTER(session_int)
554
class certificate_credentials_st(ctypes.Structure):
556
certificate_credentials_t = ctypes.POINTER(
557
certificate_credentials_st)
558
certificate_type_t = ctypes.c_int
560
class datum_t(ctypes.Structure):
561
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
562
('size', ctypes.c_uint)]
564
class openpgp_crt_int(ctypes.Structure):
566
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
567
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
568
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
569
credentials_type_t = ctypes.c_int
570
transport_ptr_t = ctypes.c_void_p
571
close_request_t = ctypes.c_int
574
class Error(Exception):
575
def __init__(self, message=None, code=None, args=()):
576
# Default usage is by a message string, but if a return
577
# code is passed, convert it to a string with
580
if message is None and code is not None:
581
message = gnutls.strerror(code)
582
return super(gnutls.Error, self).__init__(
585
class CertificateSecurityError(Error):
591
self._c_object = gnutls.certificate_credentials_t()
592
gnutls.certificate_allocate_credentials(
593
ctypes.byref(self._c_object))
594
self.type = gnutls.CRD_CERTIFICATE
597
gnutls.certificate_free_credentials(self._c_object)
600
def __init__(self, socket, credentials=None):
601
self._c_object = gnutls.session_t()
602
gnutls_flags = gnutls.CLIENT
603
if gnutls.check_version(b"3.5.6"):
604
gnutls_flags |= gnutls.NO_TICKETS
606
gnutls_flags |= gnutls.ENABLE_RAWPK
607
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
609
gnutls.set_default_priority(self._c_object)
610
gnutls.transport_set_ptr(self._c_object, socket.fileno())
611
gnutls.handshake_set_private_extensions(self._c_object,
614
if credentials is None:
615
credentials = gnutls.Credentials()
616
gnutls.credentials_set(self._c_object, credentials.type,
617
ctypes.cast(credentials._c_object,
619
self.credentials = credentials
622
gnutls.deinit(self._c_object)
625
return gnutls.handshake(self._c_object)
627
def send(self, data):
631
data_len -= gnutls.record_send(self._c_object,
636
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
638
# Error handling functions
639
def _error_code(result):
640
"""A function to raise exceptions on errors, suitable
641
for the 'restype' attribute on ctypes functions"""
644
if result == gnutls.E_NO_CERTIFICATE_FOUND:
645
raise gnutls.CertificateSecurityError(code=result)
646
raise gnutls.Error(code=result)
648
def _retry_on_error(result, func, arguments):
649
"""A function to retry on some errors, suitable
650
for the 'errcheck' attribute on ctypes functions"""
652
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
653
return _error_code(result)
654
result = func(*arguments)
657
# Unless otherwise indicated, the function declarations below are
658
# all from the gnutls/gnutls.h C header file.
661
priority_set_direct = _library.gnutls_priority_set_direct
662
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
663
ctypes.POINTER(ctypes.c_char_p)]
664
priority_set_direct.restype = _error_code
666
init = _library.gnutls_init
667
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
668
init.restype = _error_code
670
set_default_priority = _library.gnutls_set_default_priority
671
set_default_priority.argtypes = [session_t]
672
set_default_priority.restype = _error_code
674
record_send = _library.gnutls_record_send
675
record_send.argtypes = [session_t, ctypes.c_void_p,
677
record_send.restype = ctypes.c_ssize_t
678
record_send.errcheck = _retry_on_error
680
certificate_allocate_credentials = (
681
_library.gnutls_certificate_allocate_credentials)
682
certificate_allocate_credentials.argtypes = [
683
ctypes.POINTER(certificate_credentials_t)]
684
certificate_allocate_credentials.restype = _error_code
686
certificate_free_credentials = (
687
_library.gnutls_certificate_free_credentials)
688
certificate_free_credentials.argtypes = [
689
certificate_credentials_t]
690
certificate_free_credentials.restype = None
692
handshake_set_private_extensions = (
693
_library.gnutls_handshake_set_private_extensions)
694
handshake_set_private_extensions.argtypes = [session_t,
696
handshake_set_private_extensions.restype = None
698
credentials_set = _library.gnutls_credentials_set
699
credentials_set.argtypes = [session_t, credentials_type_t,
701
credentials_set.restype = _error_code
703
strerror = _library.gnutls_strerror
704
strerror.argtypes = [ctypes.c_int]
705
strerror.restype = ctypes.c_char_p
707
certificate_type_get = _library.gnutls_certificate_type_get
708
certificate_type_get.argtypes = [session_t]
709
certificate_type_get.restype = _error_code
711
certificate_get_peers = _library.gnutls_certificate_get_peers
712
certificate_get_peers.argtypes = [session_t,
713
ctypes.POINTER(ctypes.c_uint)]
714
certificate_get_peers.restype = ctypes.POINTER(datum_t)
716
global_set_log_level = _library.gnutls_global_set_log_level
717
global_set_log_level.argtypes = [ctypes.c_int]
718
global_set_log_level.restype = None
720
global_set_log_function = _library.gnutls_global_set_log_function
721
global_set_log_function.argtypes = [log_func]
722
global_set_log_function.restype = None
724
deinit = _library.gnutls_deinit
725
deinit.argtypes = [session_t]
726
deinit.restype = None
728
handshake = _library.gnutls_handshake
729
handshake.argtypes = [session_t]
730
handshake.restype = _error_code
731
handshake.errcheck = _retry_on_error
733
transport_set_ptr = _library.gnutls_transport_set_ptr
734
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
735
transport_set_ptr.restype = None
737
bye = _library.gnutls_bye
738
bye.argtypes = [session_t, close_request_t]
739
bye.restype = _error_code
740
bye.errcheck = _retry_on_error
742
check_version = _library.gnutls_check_version
743
check_version.argtypes = [ctypes.c_char_p]
744
check_version.restype = ctypes.c_char_p
746
_need_version = b"3.3.0"
747
if check_version(_need_version) is None:
748
raise self.Error("Needs GnuTLS {} or later"
749
.format(_need_version))
751
_tls_rawpk_version = b"3.6.6"
752
has_rawpk = bool(check_version(_tls_rawpk_version))
756
class pubkey_st(ctypes.Structure):
758
pubkey_t = ctypes.POINTER(pubkey_st)
760
x509_crt_fmt_t = ctypes.c_int
762
# All the function declarations below are from gnutls/abstract.h
763
pubkey_init = _library.gnutls_pubkey_init
764
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
765
pubkey_init.restype = _error_code
767
pubkey_import = _library.gnutls_pubkey_import
768
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
770
pubkey_import.restype = _error_code
772
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
773
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
774
ctypes.POINTER(ctypes.c_ubyte),
775
ctypes.POINTER(ctypes.c_size_t)]
776
pubkey_get_key_id.restype = _error_code
778
pubkey_deinit = _library.gnutls_pubkey_deinit
779
pubkey_deinit.argtypes = [pubkey_t]
780
pubkey_deinit.restype = None
782
# All the function declarations below are from gnutls/openpgp.h
784
openpgp_crt_init = _library.gnutls_openpgp_crt_init
785
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
786
openpgp_crt_init.restype = _error_code
788
openpgp_crt_import = _library.gnutls_openpgp_crt_import
789
openpgp_crt_import.argtypes = [openpgp_crt_t,
790
ctypes.POINTER(datum_t),
792
openpgp_crt_import.restype = _error_code
794
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
795
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
796
ctypes.POINTER(ctypes.c_uint)]
797
openpgp_crt_verify_self.restype = _error_code
799
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
800
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
801
openpgp_crt_deinit.restype = None
803
openpgp_crt_get_fingerprint = (
804
_library.gnutls_openpgp_crt_get_fingerprint)
805
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
809
openpgp_crt_get_fingerprint.restype = _error_code
811
if check_version(b"3.6.4"):
812
certificate_type_get2 = _library.gnutls_certificate_type_get2
813
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
814
certificate_type_get2.restype = _error_code
816
# Remove non-public functions
817
del _error_code, _retry_on_error
820
def call_pipe(connection, # : multiprocessing.Connection
821
func, *args, **kwargs):
822
"""This function is meant to be called by multiprocessing.Process
824
This function runs func(*args, **kwargs), and writes the resulting
825
return value on the provided multiprocessing.Connection.
827
connection.send(func(*args, **kwargs))
267
class Client(object):
832
268
"""A representation of a client host served by this server.
835
approved: bool(); 'None' if not yet approved/disapproved
271
_approved: bool(); 'None' if not yet approved/disapproved
836
272
approval_delay: datetime.timedelta(); Time to wait for approval
837
273
approval_duration: datetime.timedelta(); Duration of one approval
838
checker: multiprocessing.Process(); a running checker process used
839
to see if the client lives. 'None' if no process is
841
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
842
278
checker_command: string; External command which is run to check
843
279
if client lives. %() expansions are done at
844
280
runtime with vars(self) as dict, so that for
845
281
instance %(name)s can be used in the command.
846
checker_initiator_tag: a GLib event source tag, or None
282
checker_initiator_tag: a gobject event source tag, or None
847
283
created: datetime.datetime(); (UTC) object creation
848
client_structure: Object describing what attributes a client has
849
and is used for storing the client at exit
850
284
current_checker_command: string; current running checker_command
851
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
853
288
fingerprint: string (40 or 32 hexadecimal digits); used to
854
uniquely identify an OpenPGP client
855
key_id: string (64 hexadecimal digits); used to uniquely identify
856
a client using raw public keys
289
uniquely identify the client
857
290
host: string; available for use by the checker command
858
291
interval: datetime.timedelta(); How often to start a new checker
859
292
last_approval_request: datetime.datetime(); (UTC) or None
860
293
last_checked_ok: datetime.datetime(); (UTC) or None
861
last_checker_status: integer between 0 and 255 reflecting exit
862
status of last checker. -1 reflects crashed
863
checker, -2 means no checker completed yet.
864
last_checker_signal: The signal which killed the last checker, if
865
last_checker_status is -1
866
last_enabled: datetime.datetime(); (UTC) or None
294
last_enabled: datetime.datetime(); (UTC)
867
295
name: string; from the config file, used in log messages and
868
296
D-Bus identifiers
869
297
secret: bytestring; sent verbatim (over TLS) to client
870
298
timeout: datetime.timedelta(); How long from last_checked_ok
871
299
until this client is disabled
872
extended_timeout: extra long timeout when secret has been sent
300
extended_timeout: extra long timeout when password has been sent
873
301
runtime_expansions: Allowed attributes for runtime expansion.
874
expires: datetime.datetime(); time (UTC) when a client will be
302
expire: datetime.datetime(); time (UTC) when a client will be
875
303
disabled, or None
876
server_settings: The server_settings dict from main()
879
306
runtime_expansions = ("approval_delay", "approval_duration",
880
"created", "enabled", "expires", "key_id",
881
"fingerprint", "host", "interval",
882
"last_approval_request", "last_checked_ok",
307
"created", "enabled", "fingerprint",
308
"host", "interval", "last_checked_ok",
883
309
"last_enabled", "name", "timeout")
886
"extended_timeout": "PT15M",
888
"checker": "fping -q -- %%(host)s",
890
"approval_delay": "PT0S",
891
"approval_duration": "PT1S",
892
"approved_by_default": "True",
897
def config_parser(config):
898
"""Construct a new dict of client settings of this form:
899
{ client_name: {setting_name: value, ...}, ...}
900
with exceptions for any special settings as defined above.
901
NOTE: Must be a pure function. Must return the same result
902
value given the same arguments.
905
for client_name in config.sections():
906
section = dict(config.items(client_name))
907
client = settings[client_name] = {}
909
client["host"] = section["host"]
910
# Reformat values from string types to Python types
911
client["approved_by_default"] = config.getboolean(
912
client_name, "approved_by_default")
913
client["enabled"] = config.getboolean(client_name,
916
# Uppercase and remove spaces from key_id and fingerprint
917
# for later comparison purposes with return value from the
918
# key_id() and fingerprint() functions
919
client["key_id"] = (section.get("key_id", "").upper()
921
client["fingerprint"] = (section["fingerprint"].upper()
923
if "secret" in section:
924
client["secret"] = codecs.decode(section["secret"]
927
elif "secfile" in section:
928
with open(os.path.expanduser(os.path.expandvars
929
(section["secfile"])),
931
client["secret"] = secfile.read()
933
raise TypeError("No secret or secfile for section {}"
935
client["timeout"] = string_to_delta(section["timeout"])
936
client["extended_timeout"] = string_to_delta(
937
section["extended_timeout"])
938
client["interval"] = string_to_delta(section["interval"])
939
client["approval_delay"] = string_to_delta(
940
section["approval_delay"])
941
client["approval_duration"] = string_to_delta(
942
section["approval_duration"])
943
client["checker_command"] = section["checker"]
944
client["last_approval_request"] = None
945
client["last_checked_ok"] = None
946
client["last_checker_status"] = -2
950
def __init__(self, settings, name=None, server_settings=None):
312
def _timedelta_to_milliseconds(td):
313
"Convert a datetime.timedelta() to milliseconds"
314
return ((td.days * 24 * 60 * 60 * 1000)
315
+ (td.seconds * 1000)
316
+ (td.microseconds // 1000))
318
def timeout_milliseconds(self):
319
"Return the 'timeout' attribute in milliseconds"
320
return self._timedelta_to_milliseconds(self.timeout)
322
def extended_timeout_milliseconds(self):
323
"Return the 'extended_timeout' attribute in milliseconds"
324
return self._timedelta_to_milliseconds(self.extended_timeout)
326
def interval_milliseconds(self):
327
"Return the 'interval' attribute in milliseconds"
328
return self._timedelta_to_milliseconds(self.interval)
330
def approval_delay_milliseconds(self):
331
return self._timedelta_to_milliseconds(self.approval_delay)
333
def __init__(self, name = None, disable_hook=None, config=None):
334
"""Note: the 'checker' key in 'config' sets the
335
'checker_command' attribute and *not* the 'checker'
952
if server_settings is None:
954
self.server_settings = server_settings
955
# adding all client settings
956
for setting, value in settings.items():
957
setattr(self, setting, value)
960
if not hasattr(self, "last_enabled"):
961
self.last_enabled = datetime.datetime.utcnow()
962
if not hasattr(self, "expires"):
963
self.expires = (datetime.datetime.utcnow()
966
self.last_enabled = None
969
340
logger.debug("Creating client %r", self.name)
970
logger.debug(" Key ID: %s", self.key_id)
341
# Uppercase and remove spaces from fingerprint for later
342
# comparison purposes with return value from the fingerprint()
344
self.fingerprint = (config["fingerprint"].upper()
971
346
logger.debug(" Fingerprint: %s", self.fingerprint)
972
self.created = settings.get("created",
973
datetime.datetime.utcnow())
975
# attributes specific for this server instance
347
if "secret" in config:
348
self.secret = config["secret"].decode("base64")
349
elif "secfile" in config:
350
with open(os.path.expanduser(os.path.expandvars
351
(config["secfile"])),
353
self.secret = secfile.read()
355
raise TypeError("No secret or secfile for client %s"
357
self.host = config.get("host", "")
358
self.created = datetime.datetime.utcnow()
360
self.last_approval_request = None
361
self.last_enabled = None
362
self.last_checked_ok = None
363
self.timeout = string_to_delta(config["timeout"])
364
self.extended_timeout = string_to_delta(config["extended_timeout"])
365
self.interval = string_to_delta(config["interval"])
366
self.disable_hook = disable_hook
976
367
self.checker = None
977
368
self.checker_initiator_tag = None
978
369
self.disable_initiator_tag = None
979
371
self.checker_callback_tag = None
372
self.checker_command = config["checker"]
980
373
self.current_checker_command = None
374
self.last_connect = None
375
self._approved = None
376
self.approved_by_default = config.get("approved_by_default",
982
378
self.approvals_pending = 0
983
self.changedstate = multiprocessing_manager.Condition(
984
multiprocessing_manager.Lock())
985
self.client_structure = [attr
986
for attr in self.__dict__.keys()
987
if not attr.startswith("_")]
988
self.client_structure.append("client_structure")
990
for name, t in inspect.getmembers(
991
type(self), lambda obj: isinstance(obj, property)):
992
if not name.startswith("_"):
993
self.client_structure.append(name)
995
# Send notice to process children that client state has changed
379
self.approval_delay = string_to_delta(
380
config["approval_delay"])
381
self.approval_duration = string_to_delta(
382
config["approval_duration"])
383
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
996
385
def send_changedstate(self):
997
with self.changedstate:
998
self.changedstate.notify_all()
386
self.changedstate.acquire()
387
self.changedstate.notify_all()
388
self.changedstate.release()
1000
390
def enable(self):
1001
391
"""Start this client's checker and timeout hooks"""
1002
392
if getattr(self, "enabled", False):
1003
393
# Already enabled
395
self.send_changedstate()
396
self.last_enabled = datetime.datetime.utcnow()
397
# Schedule a new checker to be started an 'interval' from now,
398
# and every interval from then on.
399
self.checker_initiator_tag = (gobject.timeout_add
400
(self.interval_milliseconds(),
402
# Schedule a disable() when 'timeout' has passed
1005
403
self.expires = datetime.datetime.utcnow() + self.timeout
404
self.disable_initiator_tag = (gobject.timeout_add
405
(self.timeout_milliseconds(),
1006
407
self.enabled = True
1007
self.last_enabled = datetime.datetime.utcnow()
1009
self.send_changedstate()
408
# Also start a new checker *right now*.
1011
411
def disable(self, quiet=True):
1012
412
"""Disable this client."""
1013
413
if not getattr(self, "enabled", False):
416
self.send_changedstate()
1016
418
logger.info("Disabling client %s", self.name)
1017
if getattr(self, "disable_initiator_tag", None) is not None:
1018
GLib.source_remove(self.disable_initiator_tag)
419
if getattr(self, "disable_initiator_tag", False):
420
gobject.source_remove(self.disable_initiator_tag)
1019
421
self.disable_initiator_tag = None
1020
422
self.expires = None
1021
if getattr(self, "checker_initiator_tag", None) is not None:
1022
GLib.source_remove(self.checker_initiator_tag)
423
if getattr(self, "checker_initiator_tag", False):
424
gobject.source_remove(self.checker_initiator_tag)
1023
425
self.checker_initiator_tag = None
1024
426
self.stop_checker()
427
if self.disable_hook:
428
self.disable_hook(self)
1025
429
self.enabled = False
1027
self.send_changedstate()
1028
# Do not run this again if called by a GLib.timeout_add
430
# Do not run this again if called by a gobject.timeout_add
1031
433
def __del__(self):
434
self.disable_hook = None
1034
def init_checker(self):
1035
# Schedule a new checker to be started an 'interval' from now,
1036
# and every interval from then on.
1037
if self.checker_initiator_tag is not None:
1038
GLib.source_remove(self.checker_initiator_tag)
1039
self.checker_initiator_tag = GLib.timeout_add(
1040
int(self.interval.total_seconds() * 1000),
1042
# Schedule a disable() when 'timeout' has passed
1043
if self.disable_initiator_tag is not None:
1044
GLib.source_remove(self.disable_initiator_tag)
1045
self.disable_initiator_tag = GLib.timeout_add(
1046
int(self.timeout.total_seconds() * 1000), self.disable)
1047
# Also start a new checker *right now*.
1048
self.start_checker()
1050
def checker_callback(self, source, condition, connection,
437
def checker_callback(self, pid, condition, command):
1052
438
"""The checker has completed, so take appropriate actions."""
1053
# Read return code from connection (see call_pipe)
1054
returncode = connection.recv()
1057
439
self.checker_callback_tag = None
1058
440
self.checker = None
1061
self.last_checker_status = returncode
1062
self.last_checker_signal = None
1063
if self.last_checker_status == 0:
441
if os.WIFEXITED(condition):
442
exitstatus = os.WEXITSTATUS(condition)
1064
444
logger.info("Checker for %(name)s succeeded",
1066
446
self.checked_ok()
1068
logger.info("Checker for %(name)s failed", vars(self))
448
logger.info("Checker for %(name)s failed",
1070
self.last_checker_status = -1
1071
self.last_checker_signal = -returncode
1072
451
logger.warning("Checker for %(name)s crashed?",
1076
def checked_ok(self):
1077
"""Assert that the client has been seen, alive and well."""
1078
self.last_checked_ok = datetime.datetime.utcnow()
1079
self.last_checker_status = 0
1080
self.last_checker_signal = None
1083
def bump_timeout(self, timeout=None):
1084
"""Bump up the timeout for this client."""
454
def checked_ok(self, timeout=None):
455
"""Bump up the timeout for this client.
457
This should only be called when the client has been seen,
1085
460
if timeout is None:
1086
461
timeout = self.timeout
1087
if self.disable_initiator_tag is not None:
1088
GLib.source_remove(self.disable_initiator_tag)
1089
self.disable_initiator_tag = None
1090
if getattr(self, "enabled", False):
1091
self.disable_initiator_tag = GLib.timeout_add(
1092
int(timeout.total_seconds() * 1000), self.disable)
1093
self.expires = datetime.datetime.utcnow() + timeout
462
self.last_checked_ok = datetime.datetime.utcnow()
463
gobject.source_remove(self.disable_initiator_tag)
464
self.expires = datetime.datetime.utcnow() + timeout
465
self.disable_initiator_tag = (gobject.timeout_add
466
(self._timedelta_to_milliseconds(timeout),
1095
469
def need_approval(self):
1096
470
self.last_approval_request = datetime.datetime.utcnow()
1098
472
def start_checker(self):
1099
473
"""Start a new checker subprocess if one is not running.
1101
475
If a checker already exists, leave it running and do
1103
477
# The reason for not killing a running checker is that if we
1104
# did that, and if a checker (for some reason) started running
1105
# slowly and taking more than 'interval' time, then the client
1106
# would inevitably timeout, since no checker would get a
1107
# chance to run to completion. If we instead leave running
478
# did that, then if a checker (for some reason) started
479
# running slowly and taking more than 'interval' time, the
480
# client would inevitably timeout, since no checker would get
481
# a chance to run to completion. If we instead leave running
1108
482
# checkers alone, the checker would have to take more time
1109
483
# than 'timeout' for the client to be disabled, which is as it
1112
if self.checker is not None and not self.checker.is_alive():
1113
logger.warning("Checker was not alive; joining")
486
# If a checker exists, make sure it is not a zombie
488
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
489
except (AttributeError, OSError) as error:
490
if (isinstance(error, OSError)
491
and error.errno != errno.ECHILD):
495
logger.warning("Checker was a zombie")
496
gobject.source_remove(self.checker_callback_tag)
497
self.checker_callback(pid, status,
498
self.current_checker_command)
1116
499
# Start a new checker if needed
1117
500
if self.checker is None:
1118
# Escape attributes for the shell
1120
attr: re.escape(str(getattr(self, attr)))
1121
for attr in self.runtime_expansions}
1123
command = self.checker_command % escaped_attrs
1124
except TypeError as error:
1125
logger.error('Could not format string "%s"',
1126
self.checker_command,
1128
return True # Try again later
502
# In case checker_command has exactly one % operator
503
command = self.checker_command % self.host
505
# Escape attributes for the shell
506
escaped_attrs = dict(
508
re.escape(unicode(str(getattr(self, attr, "")),
512
self.runtime_expansions)
515
command = self.checker_command % escaped_attrs
516
except TypeError as error:
517
logger.error('Could not format string "%s":'
518
' %s', self.checker_command, error)
519
return True # Try again later
1129
520
self.current_checker_command = command
1130
logger.info("Starting checker %r for %s", command,
1132
# We don't need to redirect stdout and stderr, since
1133
# in normal mode, that is already done by daemon(),
1134
# and in debug mode we don't want to. (Stdin is
1135
# always replaced by /dev/null.)
1136
# The exception is when not debugging but nevertheless
1137
# running in the foreground; use the previously
1139
popen_args = {"close_fds": True,
1142
if (not self.server_settings["debug"]
1143
and self.server_settings["foreground"]):
1144
popen_args.update({"stdout": wnull,
1146
pipe = multiprocessing.Pipe(duplex=False)
1147
self.checker = multiprocessing.Process(
1149
args=(pipe[1], subprocess.call, command),
1151
self.checker.start()
1152
self.checker_callback_tag = GLib.io_add_watch(
1153
GLib.IOChannel.unix_new(pipe[0].fileno()),
1154
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
1155
self.checker_callback, pipe[0], command)
1156
# Re-run this periodically if run by GLib.timeout_add
522
logger.info("Starting checker %r for %s",
524
# We don't need to redirect stdout and stderr, since
525
# in normal mode, that is already done by daemon(),
526
# and in debug mode we don't want to. (Stdin is
527
# always replaced by /dev/null.)
528
self.checker = subprocess.Popen(command,
531
self.checker_callback_tag = (gobject.child_watch_add
533
self.checker_callback,
535
# The checker may have completed before the gobject
536
# watch was added. Check for this.
537
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
539
gobject.source_remove(self.checker_callback_tag)
540
self.checker_callback(pid, status, command)
541
except OSError as error:
542
logger.error("Failed to start subprocess: %s",
544
# Re-run this periodically if run by gobject.timeout_add
1159
547
def stop_checker(self):
1160
548
"""Force the checker process, if any, to stop."""
1161
549
if self.checker_callback_tag:
1162
GLib.source_remove(self.checker_callback_tag)
550
gobject.source_remove(self.checker_callback_tag)
1163
551
self.checker_callback_tag = None
1164
552
if getattr(self, "checker", None) is None:
1166
554
logger.debug("Stopping checker for %(name)s", vars(self))
1167
self.checker.terminate()
556
os.kill(self.checker.pid, signal.SIGTERM)
558
#if self.checker.poll() is None:
559
# os.kill(self.checker.pid, signal.SIGKILL)
560
except OSError as error:
561
if error.errno != errno.ESRCH: # No such process
1168
563
self.checker = None
1171
def dbus_service_property(dbus_interface,
565
def dbus_service_property(dbus_interface, signature="v",
566
access="readwrite", byte_arrays=False):
1175
567
"""Decorators for marking methods of a DBusObjectWithProperties to
1176
568
become properties on the D-Bus.
1178
570
The decorated method will be called with no arguments by "Get"
1179
571
and with one argument by "Set".
1181
573
The parameters, where they are supported, are the same as
1182
574
dbus.service.method, except there is only "signature", since the
1183
575
type from Get() and the type sent to Set() is the same.
1516
747
except (AttributeError, xml.dom.DOMException,
1517
748
xml.parsers.expat.ExpatError) as error:
1518
749
logger.error("Failed to override Introspection method",
1524
dbus.OBJECT_MANAGER_IFACE
1525
except AttributeError:
1526
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1529
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1530
"""A D-Bus object with an ObjectManager.
1532
Classes inheriting from this exposes the standard
1533
GetManagedObjects call and the InterfacesAdded and
1534
InterfacesRemoved signals on the standard
1535
"org.freedesktop.DBus.ObjectManager" interface.
1537
Note: No signals are sent automatically; they must be sent
1540
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1541
out_signature="a{oa{sa{sv}}}")
1542
def GetManagedObjects(self):
1543
"""This function must be overridden"""
1544
raise NotImplementedError()
1546
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1547
signature="oa{sa{sv}}")
1548
def InterfacesAdded(self, object_path, interfaces_and_properties):
1551
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1552
def InterfacesRemoved(self, object_path, interfaces):
1555
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1557
path_keyword='object_path',
1558
connection_keyword='connection')
1559
def Introspect(self, object_path, connection):
1560
"""Overloading of standard D-Bus method.
1562
Override return argument name of GetManagedObjects to be
1563
"objpath_interfaces_and_properties"
1565
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1569
document = xml.dom.minidom.parseString(xmlstring)
1571
for if_tag in document.getElementsByTagName("interface"):
1572
# Fix argument name for the GetManagedObjects method
1573
if (if_tag.getAttribute("name")
1574
== dbus.OBJECT_MANAGER_IFACE):
1575
for cn in if_tag.getElementsByTagName("method"):
1576
if (cn.getAttribute("name")
1577
== "GetManagedObjects"):
1578
for arg in cn.getElementsByTagName("arg"):
1579
if (arg.getAttribute("direction")
1583
"objpath_interfaces"
1585
xmlstring = document.toxml("utf-8")
1587
except (AttributeError, xml.dom.DOMException,
1588
xml.parsers.expat.ExpatError) as error:
1589
logger.error("Failed to override Introspection method",
1594
def datetime_to_dbus(dt, variant_level=0):
1595
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1597
return dbus.String("", variant_level=variant_level)
1598
return dbus.String(dt.isoformat(), variant_level=variant_level)
1601
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1602
"""A class decorator; applied to a subclass of
1603
dbus.service.Object, it will add alternate D-Bus attributes with
1604
interface names according to the "alt_interface_names" mapping.
1607
@alternate_dbus_interfaces({"org.example.Interface":
1608
"net.example.AlternateInterface"})
1609
class SampleDBusObject(dbus.service.Object):
1610
@dbus.service.method("org.example.Interface")
1611
def SampleDBusMethod():
1614
The above "SampleDBusMethod" on "SampleDBusObject" will be
1615
reachable via two interfaces: "org.example.Interface" and
1616
"net.example.AlternateInterface", the latter of which will have
1617
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1618
"true", unless "deprecate" is passed with a False value.
1620
This works for methods and signals, and also for D-Bus properties
1621
(from DBusObjectWithProperties) and interfaces (from the
1622
dbus_interface_annotations decorator).
1626
for orig_interface_name, alt_interface_name in (
1627
alt_interface_names.items()):
1629
interface_names = set()
1630
# Go though all attributes of the class
1631
for attrname, attribute in inspect.getmembers(cls):
1632
# Ignore non-D-Bus attributes, and D-Bus attributes
1633
# with the wrong interface name
1634
if (not hasattr(attribute, "_dbus_interface")
1635
or not attribute._dbus_interface.startswith(
1636
orig_interface_name)):
1638
# Create an alternate D-Bus interface name based on
1640
alt_interface = attribute._dbus_interface.replace(
1641
orig_interface_name, alt_interface_name)
1642
interface_names.add(alt_interface)
1643
# Is this a D-Bus signal?
1644
if getattr(attribute, "_dbus_is_signal", False):
1645
# Extract the original non-method undecorated
1646
# function by black magic
1647
if sys.version_info.major == 2:
1648
nonmethod_func = (dict(
1649
zip(attribute.func_code.co_freevars,
1650
attribute.__closure__))
1651
["func"].cell_contents)
1653
nonmethod_func = (dict(
1654
zip(attribute.__code__.co_freevars,
1655
attribute.__closure__))
1656
["func"].cell_contents)
1657
# Create a new, but exactly alike, function
1658
# object, and decorate it to be a new D-Bus signal
1659
# with the alternate D-Bus interface name
1660
new_function = copy_function(nonmethod_func)
1661
new_function = (dbus.service.signal(
1663
attribute._dbus_signature)(new_function))
1664
# Copy annotations, if any
1666
new_function._dbus_annotations = dict(
1667
attribute._dbus_annotations)
1668
except AttributeError:
1671
# Define a creator of a function to call both the
1672
# original and alternate functions, so both the
1673
# original and alternate signals gets sent when
1674
# the function is called
1675
def fixscope(func1, func2):
1676
"""This function is a scope container to pass
1677
func1 and func2 to the "call_both" function
1678
outside of its arguments"""
1680
@functools.wraps(func2)
1681
def call_both(*args, **kwargs):
1682
"""This function will emit two D-Bus
1683
signals by calling func1 and func2"""
1684
func1(*args, **kwargs)
1685
func2(*args, **kwargs)
1686
# Make wrapper function look like a D-Bus
1688
for name, attr in inspect.getmembers(func2):
1689
if name.startswith("_dbus_"):
1690
setattr(call_both, name, attr)
1693
# Create the "call_both" function and add it to
1695
attr[attrname] = fixscope(attribute, new_function)
1696
# Is this a D-Bus method?
1697
elif getattr(attribute, "_dbus_is_method", False):
1698
# Create a new, but exactly alike, function
1699
# object. Decorate it to be a new D-Bus method
1700
# with the alternate D-Bus interface name. Add it
1703
dbus.service.method(
1705
attribute._dbus_in_signature,
1706
attribute._dbus_out_signature)
1707
(copy_function(attribute)))
1708
# Copy annotations, if any
1710
attr[attrname]._dbus_annotations = dict(
1711
attribute._dbus_annotations)
1712
except AttributeError:
1714
# Is this a D-Bus property?
1715
elif getattr(attribute, "_dbus_is_property", False):
1716
# Create a new, but exactly alike, function
1717
# object, and decorate it to be a new D-Bus
1718
# property with the alternate D-Bus interface
1719
# name. Add it to the class.
1720
attr[attrname] = (dbus_service_property(
1721
alt_interface, attribute._dbus_signature,
1722
attribute._dbus_access,
1723
attribute._dbus_get_args_options
1725
(copy_function(attribute)))
1726
# Copy annotations, if any
1728
attr[attrname]._dbus_annotations = dict(
1729
attribute._dbus_annotations)
1730
except AttributeError:
1732
# Is this a D-Bus interface?
1733
elif getattr(attribute, "_dbus_is_interface", False):
1734
# Create a new, but exactly alike, function
1735
# object. Decorate it to be a new D-Bus interface
1736
# with the alternate D-Bus interface name. Add it
1739
dbus_interface_annotations(alt_interface)
1740
(copy_function(attribute)))
1742
# Deprecate all alternate interfaces
1743
iname = "_AlternateDBusNames_interface_annotation{}"
1744
for interface_name in interface_names:
1746
@dbus_interface_annotations(interface_name)
1748
return {"org.freedesktop.DBus.Deprecated":
1750
# Find an unused name
1751
for aname in (iname.format(i)
1752
for i in itertools.count()):
1753
if aname not in attr:
1757
# Replace the class with a new subclass of it with
1758
# methods, signals, etc. as created above.
1759
if sys.version_info.major == 2:
1760
cls = type(b"{}Alternate".format(cls.__name__),
1763
cls = type("{}Alternate".format(cls.__name__),
1770
@alternate_dbus_interfaces({"se.recompile.Mandos":
1771
"se.bsnet.fukt.Mandos"})
1772
754
class ClientDBus(Client, DBusObjectWithProperties):
1773
755
"""A Client class using D-Bus
1776
758
dbus_object_path: dbus.ObjectPath
1777
759
bus: dbus.SystemBus()
1780
762
runtime_expansions = (Client.runtime_expansions
1781
+ ("dbus_object_path", ))
1783
_interface = "se.recompile.Mandos.Client"
763
+ ("dbus_object_path",))
1785
765
# dbus.service.Object doesn't use super(), so we can't either.
1787
def __init__(self, bus=None, *args, **kwargs):
767
def __init__(self, bus = None, *args, **kwargs):
768
self._approvals_pending = 0
1789
770
Client.__init__(self, *args, **kwargs)
1790
771
# Only now, when this client is initialized, can it show up on
1792
client_object_name = str(self.name).translate(
773
client_object_name = unicode(self.name).translate(
1793
774
{ord("."): ord("_"),
1794
775
ord("-"): ord("_")})
1795
self.dbus_object_path = dbus.ObjectPath(
1796
"/clients/" + client_object_name)
776
self.dbus_object_path = (dbus.ObjectPath
777
("/clients/" + client_object_name))
1797
778
DBusObjectWithProperties.__init__(self, self.bus,
1798
779
self.dbus_object_path)
1800
def notifychangeproperty(transform_func, dbus_name,
1801
type_func=lambda x: x,
1803
invalidate_only=False,
1804
_interface=_interface):
1805
""" Modify a variable so that it's a property which announces
1806
its changes to DBus.
1808
transform_fun: Function that takes a value and a variant_level
1809
and transforms it to a D-Bus type.
1810
dbus_name: D-Bus name of the variable
1811
type_func: Function that transform the value before sending it
1812
to the D-Bus. Default: no transform
1813
variant_level: D-Bus variant level. Default: 1
1815
attrname = "_{}".format(dbus_name)
1817
def setter(self, value):
1818
if hasattr(self, "dbus_object_path"):
1819
if (not hasattr(self, attrname) or
1820
type_func(getattr(self, attrname, None))
1821
!= type_func(value)):
1823
self.PropertiesChanged(
1824
_interface, dbus.Dictionary(),
1825
dbus.Array((dbus_name, )))
1827
dbus_value = transform_func(
1829
variant_level=variant_level)
1830
self.PropertyChanged(dbus.String(dbus_name),
1832
self.PropertiesChanged(
1834
dbus.Dictionary({dbus.String(dbus_name):
1837
setattr(self, attrname, value)
1839
return property(lambda self: getattr(self, attrname), setter)
1841
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1842
approvals_pending = notifychangeproperty(dbus.Boolean,
1845
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1846
last_enabled = notifychangeproperty(datetime_to_dbus,
1848
checker = notifychangeproperty(
1849
dbus.Boolean, "CheckerRunning",
1850
type_func=lambda checker: checker is not None)
1851
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1853
last_checker_status = notifychangeproperty(dbus.Int16,
1854
"LastCheckerStatus")
1855
last_approval_request = notifychangeproperty(
1856
datetime_to_dbus, "LastApprovalRequest")
1857
approved_by_default = notifychangeproperty(dbus.Boolean,
1858
"ApprovedByDefault")
1859
approval_delay = notifychangeproperty(
1860
dbus.UInt64, "ApprovalDelay",
1861
type_func=lambda td: td.total_seconds() * 1000)
1862
approval_duration = notifychangeproperty(
1863
dbus.UInt64, "ApprovalDuration",
1864
type_func=lambda td: td.total_seconds() * 1000)
1865
host = notifychangeproperty(dbus.String, "Host")
1866
timeout = notifychangeproperty(
1867
dbus.UInt64, "Timeout",
1868
type_func=lambda td: td.total_seconds() * 1000)
1869
extended_timeout = notifychangeproperty(
1870
dbus.UInt64, "ExtendedTimeout",
1871
type_func=lambda td: td.total_seconds() * 1000)
1872
interval = notifychangeproperty(
1873
dbus.UInt64, "Interval",
1874
type_func=lambda td: td.total_seconds() * 1000)
1875
checker_command = notifychangeproperty(dbus.String, "Checker")
1876
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1877
invalidate_only=True)
1879
del notifychangeproperty
780
def _set_expires(self, value):
781
old_value = getattr(self, "_expires", None)
782
self._expires = value
783
if hasattr(self, "dbus_object_path") and old_value != value:
784
dbus_time = (self._datetime_to_dbus(self._expires,
786
self.PropertyChanged(dbus.String("Expires"),
788
expires = property(lambda self: self._expires, _set_expires)
791
def _get_approvals_pending(self):
792
return self._approvals_pending
793
def _set_approvals_pending(self, value):
794
old_value = self._approvals_pending
795
self._approvals_pending = value
797
if (hasattr(self, "dbus_object_path")
798
and bval is not bool(old_value)):
799
dbus_bool = dbus.Boolean(bval, variant_level=1)
800
self.PropertyChanged(dbus.String("ApprovalPending"),
803
approvals_pending = property(_get_approvals_pending,
804
_set_approvals_pending)
805
del _get_approvals_pending, _set_approvals_pending
808
def _datetime_to_dbus(dt, variant_level=0):
809
"""Convert a UTC datetime.datetime() to a D-Bus type."""
811
return dbus.String("", variant_level = variant_level)
812
return dbus.String(dt.isoformat(),
813
variant_level=variant_level)
816
oldstate = getattr(self, "enabled", False)
817
r = Client.enable(self)
818
if oldstate != self.enabled:
820
self.PropertyChanged(dbus.String("Enabled"),
821
dbus.Boolean(True, variant_level=1))
822
self.PropertyChanged(
823
dbus.String("LastEnabled"),
824
self._datetime_to_dbus(self.last_enabled,
828
def disable(self, quiet = False):
829
oldstate = getattr(self, "enabled", False)
830
r = Client.disable(self, quiet=quiet)
831
if not quiet and oldstate != self.enabled:
833
self.PropertyChanged(dbus.String("Enabled"),
834
dbus.Boolean(False, variant_level=1))
1881
837
def __del__(self, *args, **kwargs):
1883
839
self.remove_from_connection()
2382
1368
delay -= time2 - time
2385
session.send(client.secret)
2386
except gnutls.Error as error:
2387
logger.warning("gnutls send failed",
1371
while sent_size < len(client.secret):
1373
sent = session.send(client.secret[sent_size:])
1374
except gnutls.errors.GNUTLSError as error:
1375
logger.warning("gnutls send failed")
1377
logger.debug("Sent: %d, remaining: %d",
1378
sent, len(client.secret)
1379
- (sent_size + sent))
2391
1382
logger.info("Sending secret to %s", client.name)
2392
# bump the timeout using extended_timeout
2393
client.bump_timeout(client.extended_timeout)
1383
# bump the timeout as if seen
1384
client.checked_ok(client.extended_timeout)
2394
1385
if self.server.use_dbus:
2395
1386
# Emit D-Bus signal
2396
1387
client.GotSecret()
2399
1390
if approval_required:
2400
1391
client.approvals_pending -= 1
2403
except gnutls.Error as error:
2404
logger.warning("GnuTLS bye failed",
1394
except gnutls.errors.GNUTLSError as error:
1395
logger.warning("GnuTLS bye failed")
2408
1398
def peer_certificate(session):
2409
"Return the peer's certificate as a bytestring"
2411
cert_type = gnutls.certificate_type_get2(session._c_object,
2413
except AttributeError:
2414
cert_type = gnutls.certificate_type_get(session._c_object)
2415
if gnutls.has_rawpk:
2416
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2418
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2419
# If not a valid certificate type...
2420
if cert_type not in valid_cert_types:
2421
logger.info("Cert type %r not in %r", cert_type,
2423
# ...return invalid data
1399
"Return the peer's OpenPGP certificate as a bytestring"
1400
# If not an OpenPGP certificate...
1401
if (gnutls.library.functions
1402
.gnutls_certificate_type_get(session._c_object)
1403
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1404
# ...do the normal thing
1405
return session.peer_certificate
2425
1406
list_size = ctypes.c_uint(1)
2426
cert_list = (gnutls.certificate_get_peers
1407
cert_list = (gnutls.library.functions
1408
.gnutls_certificate_get_peers
2427
1409
(session._c_object, ctypes.byref(list_size)))
2428
1410
if not bool(cert_list) and list_size.value != 0:
2429
raise gnutls.Error("error getting peer certificate")
1411
raise gnutls.errors.GNUTLSError("error getting peer"
2430
1413
if list_size.value == 0:
2432
1415
cert = cert_list[0]
2433
1416
return ctypes.string_at(cert.data, cert.size)
2436
def key_id(certificate):
2437
"Convert a certificate bytestring to a hexdigit key ID"
2438
# New GnuTLS "datum" with the public key
2439
datum = gnutls.datum_t(
2440
ctypes.cast(ctypes.c_char_p(certificate),
2441
ctypes.POINTER(ctypes.c_ubyte)),
2442
ctypes.c_uint(len(certificate)))
2443
# XXX all these need to be created in the gnutls "module"
2444
# New empty GnuTLS certificate
2445
pubkey = gnutls.pubkey_t()
2446
gnutls.pubkey_init(ctypes.byref(pubkey))
2447
# Import the raw public key into the certificate
2448
gnutls.pubkey_import(pubkey,
2449
ctypes.byref(datum),
2450
gnutls.X509_FMT_DER)
2451
# New buffer for the key ID
2452
buf = ctypes.create_string_buffer(32)
2453
buf_len = ctypes.c_size_t(len(buf))
2454
# Get the key ID from the raw public key into the buffer
2455
gnutls.pubkey_get_key_id(pubkey,
2456
gnutls.KEYID_USE_SHA256,
2457
ctypes.cast(ctypes.byref(buf),
2458
ctypes.POINTER(ctypes.c_ubyte)),
2459
ctypes.byref(buf_len))
2460
# Deinit the certificate
2461
gnutls.pubkey_deinit(pubkey)
2463
# Convert the buffer to a Python bytestring
2464
key_id = ctypes.string_at(buf, buf_len.value)
2465
# Convert the bytestring to hexadecimal notation
2466
hex_key_id = binascii.hexlify(key_id).upper()
2470
1419
def fingerprint(openpgp):
2471
1420
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2472
1421
# New GnuTLS "datum" with the OpenPGP public key
2473
datum = gnutls.datum_t(
2474
ctypes.cast(ctypes.c_char_p(openpgp),
2475
ctypes.POINTER(ctypes.c_ubyte)),
2476
ctypes.c_uint(len(openpgp)))
1422
datum = (gnutls.library.types
1423
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1426
ctypes.c_uint(len(openpgp))))
2477
1427
# New empty GnuTLS certificate
2478
crt = gnutls.openpgp_crt_t()
2479
gnutls.openpgp_crt_init(ctypes.byref(crt))
1428
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1429
(gnutls.library.functions
1430
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2480
1431
# Import the OpenPGP public key into the certificate
2481
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2482
gnutls.OPENPGP_FMT_RAW)
1432
(gnutls.library.functions
1433
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1434
gnutls.library.constants
1435
.GNUTLS_OPENPGP_FMT_RAW))
2483
1436
# Verify the self signature in the key
2484
1437
crtverify = ctypes.c_uint()
2485
gnutls.openpgp_crt_verify_self(crt, 0,
2486
ctypes.byref(crtverify))
1438
(gnutls.library.functions
1439
.gnutls_openpgp_crt_verify_self(crt, 0,
1440
ctypes.byref(crtverify)))
2487
1441
if crtverify.value != 0:
2488
gnutls.openpgp_crt_deinit(crt)
2489
raise gnutls.CertificateSecurityError(code
1442
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1443
raise (gnutls.errors.CertificateSecurityError
2491
1445
# New buffer for the fingerprint
2492
1446
buf = ctypes.create_string_buffer(20)
2493
1447
buf_len = ctypes.c_size_t()
2494
1448
# Get the fingerprint from the certificate into the buffer
2495
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2496
ctypes.byref(buf_len))
1449
(gnutls.library.functions
1450
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1451
ctypes.byref(buf_len)))
2497
1452
# Deinit the certificate
2498
gnutls.openpgp_crt_deinit(crt)
1453
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2499
1454
# Convert the buffer to a Python bytestring
2500
1455
fpr = ctypes.string_at(buf, buf_len.value)
2501
1456
# Convert the bytestring to hexadecimal notation
2502
hex_fpr = binascii.hexlify(fpr).upper()
1457
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2506
class MultiprocessingMixIn:
1461
class MultiprocessingMixIn(object):
2507
1462
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2509
1463
def sub_process_main(self, request, address):
2511
1465
self.finish_request(request, address)
2513
1467
self.handle_error(request, address)
2514
1468
self.close_request(request)
2516
1470
def process_request(self, request, address):
2517
1471
"""Start a new process to process the request."""
2518
proc = multiprocessing.Process(target=self.sub_process_main,
2519
args=(request, address))
2524
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
1472
multiprocessing.Process(target = self.sub_process_main,
1473
args = (request, address)).start()
1475
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2525
1476
""" adds a pipe to the MixIn """
2527
1477
def process_request(self, request, client_address):
2528
1478
"""Overrides and wraps the original process_request().
2530
1480
This function creates a new pipe in self.pipe
2532
1482
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2534
proc = MultiprocessingMixIn.process_request(self, request,
1484
super(MultiprocessingMixInWithPipe,
1485
self).process_request(request, client_address)
2536
1486
self.child_pipe.close()
2537
self.add_pipe(parent_pipe, proc)
1487
self.add_pipe(parent_pipe)
2539
def add_pipe(self, parent_pipe, proc):
1489
def add_pipe(self, parent_pipe):
2540
1490
"""Dummy function; override as necessary"""
2541
raise NotImplementedError()
1491
raise NotImplementedError
2544
1493
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2545
socketserver.TCPServer):
1494
socketserver.TCPServer, object):
2546
1495
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2549
1498
enabled: Boolean; whether this server is activated yet
2550
1499
interface: None or a network interface name (string)
2551
1500
use_ipv6: Boolean; to use IPv6 or not
2554
1502
def __init__(self, server_address, RequestHandlerClass,
2558
"""If socketfd is set, use that file descriptor instead of
2559
creating a new one with socket.socket().
1503
interface=None, use_ipv6=True):
2561
1504
self.interface = interface
2563
1506
self.address_family = socket.AF_INET6
2564
if socketfd is not None:
2565
# Save the file descriptor
2566
self.socketfd = socketfd
2567
# Save the original socket.socket() function
2568
self.socket_socket = socket.socket
2570
# To implement --socket, we monkey patch socket.socket.
2572
# (When socketserver.TCPServer is a new-style class, we
2573
# could make self.socket into a property instead of monkey
2574
# patching socket.socket.)
2576
# Create a one-time-only replacement for socket.socket()
2577
@functools.wraps(socket.socket)
2578
def socket_wrapper(*args, **kwargs):
2579
# Restore original function so subsequent calls are
2581
socket.socket = self.socket_socket
2582
del self.socket_socket
2583
# This time only, return a new socket object from the
2584
# saved file descriptor.
2585
return socket.fromfd(self.socketfd, *args, **kwargs)
2586
# Replace socket.socket() function with wrapper
2587
socket.socket = socket_wrapper
2588
# The socketserver.TCPServer.__init__ will call
2589
# socket.socket(), which might be our replacement,
2590
# socket_wrapper(), if socketfd was set.
2591
1507
socketserver.TCPServer.__init__(self, server_address,
2592
1508
RequestHandlerClass)
2594
1509
def server_bind(self):
2595
1510
"""This overrides the normal server_bind() function
2596
1511
to bind to an interface if one was specified, and also NOT to
2597
1512
bind to an address or port if they were not specified."""
2598
global SO_BINDTODEVICE
2599
1513
if self.interface is not None:
2600
1514
if SO_BINDTODEVICE is None:
2601
# Fall back to a hard-coded value which seems to be
2603
logger.warning("SO_BINDTODEVICE not found, trying 25")
2604
SO_BINDTODEVICE = 25
2606
self.socket.setsockopt(
2607
socket.SOL_SOCKET, SO_BINDTODEVICE,
2608
(self.interface + "\0").encode("utf-8"))
2609
except socket.error as error:
2610
if error.errno == errno.EPERM:
2611
logger.error("No permission to bind to"
2612
" interface %s", self.interface)
2613
elif error.errno == errno.ENOPROTOOPT:
2614
logger.error("SO_BINDTODEVICE not available;"
2615
" cannot bind to interface %s",
2617
elif error.errno == errno.ENODEV:
2618
logger.error("Interface %s does not exist,"
2619
" cannot bind", self.interface)
1515
logger.error("SO_BINDTODEVICE does not exist;"
1516
" cannot bind to interface %s",
1520
self.socket.setsockopt(socket.SOL_SOCKET,
1524
except socket.error as error:
1525
if error[0] == errno.EPERM:
1526
logger.error("No permission to"
1527
" bind to interface %s",
1529
elif error[0] == errno.ENOPROTOOPT:
1530
logger.error("SO_BINDTODEVICE not available;"
1531
" cannot bind to interface %s",
2622
1535
# Only bind(2) the socket if we really need to.
2623
1536
if self.server_address[0] or self.server_address[1]:
2624
if self.server_address[1]:
2625
self.allow_reuse_address = True
2626
1537
if not self.server_address[0]:
2627
1538
if self.address_family == socket.AF_INET6:
2628
any_address = "::" # in6addr_any
1539
any_address = "::" # in6addr_any
2630
any_address = "0.0.0.0" # INADDR_ANY
1541
any_address = socket.INADDR_ANY
2631
1542
self.server_address = (any_address,
2632
1543
self.server_address[1])
2633
1544
elif not self.server_address[1]:
2634
self.server_address = (self.server_address[0], 0)
1545
self.server_address = (self.server_address[0],
2635
1547
# if self.interface:
2636
1548
# self.server_address = (self.server_address[0],
2964
1780
parser.add_argument("--no-dbus", action="store_false",
2965
1781
dest="use_dbus", help="Do not provide D-Bus"
2966
" system bus interface", default=None)
1782
" system bus interface")
2967
1783
parser.add_argument("--no-ipv6", action="store_false",
2968
dest="use_ipv6", help="Do not use IPv6",
2970
parser.add_argument("--no-restore", action="store_false",
2971
dest="restore", help="Do not restore stored"
2972
" state", default=None)
2973
parser.add_argument("--socket", type=int,
2974
help="Specify a file descriptor to a network"
2975
" socket to use instead of creating one")
2976
parser.add_argument("--statedir", metavar="DIR",
2977
help="Directory to save/restore state in")
2978
parser.add_argument("--foreground", action="store_true",
2979
help="Run in foreground", default=None)
2980
parser.add_argument("--no-zeroconf", action="store_false",
2981
dest="zeroconf", help="Do not use Zeroconf",
1784
dest="use_ipv6", help="Do not use IPv6")
2984
1785
options = parser.parse_args()
2986
1792
# Default values for config file for server-global settings
2987
if gnutls.has_rawpk:
2988
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2989
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2991
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2992
":+SIGN-DSA-SHA256")
2993
server_defaults = {"interface": "",
2997
"priority": priority,
2998
"servicename": "Mandos",
3004
"statedir": "/var/lib/mandos",
3005
"foreground": "False",
1793
server_defaults = { "interface": "",
1798
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1799
"servicename": "Mandos",
3010
1805
# Parse config file for server-global settings
3011
server_config = configparser.ConfigParser(server_defaults)
1806
server_config = configparser.SafeConfigParser(server_defaults)
3012
1807
del server_defaults
3013
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3014
# Convert the ConfigParser object to a dict
1808
server_config.read(os.path.join(options.configdir,
1810
# Convert the SafeConfigParser object to a dict
3015
1811
server_settings = server_config.defaults()
3016
1812
# Use the appropriate methods on the non-string config options
3017
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3018
"foreground", "zeroconf"):
1813
for option in ("debug", "use_dbus", "use_ipv6"):
3019
1814
server_settings[option] = server_config.getboolean("DEFAULT",
3021
1816
if server_settings["port"]:
3022
1817
server_settings["port"] = server_config.getint("DEFAULT",
3024
if server_settings["socket"]:
3025
server_settings["socket"] = server_config.getint("DEFAULT",
3027
# Later, stdin will, and stdout and stderr might, be dup'ed
3028
# over with an opened os.devnull. But we don't want this to
3029
# happen with a supplied network socket.
3030
if 0 <= server_settings["socket"] <= 2:
3031
server_settings["socket"] = os.dup(server_settings
3033
1819
del server_config
3035
1821
# Override the settings from the config file with command line
3036
1822
# options, if set.
3037
1823
for option in ("interface", "address", "port", "debug",
3038
"priority", "servicename", "configdir", "use_dbus",
3039
"use_ipv6", "debuglevel", "restore", "statedir",
3040
"socket", "foreground", "zeroconf"):
1824
"priority", "servicename", "configdir",
1825
"use_dbus", "use_ipv6", "debuglevel"):
3041
1826
value = getattr(options, option)
3042
1827
if value is not None:
3043
1828
server_settings[option] = value
3045
1830
# Force all strings to be unicode
3046
1831
for option in server_settings.keys():
3047
if isinstance(server_settings[option], bytes):
3048
server_settings[option] = (server_settings[option]
3050
# Force all boolean options to be boolean
3051
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3052
"foreground", "zeroconf"):
3053
server_settings[option] = bool(server_settings[option])
3054
# Debug implies foreground
3055
if server_settings["debug"]:
3056
server_settings["foreground"] = True
1832
if type(server_settings[option]) is str:
1833
server_settings[option] = unicode(server_settings[option])
3057
1834
# Now we have our good server settings in "server_settings"
3059
1836
##################################################################
3061
if (not server_settings["zeroconf"]
3062
and not (server_settings["port"]
3063
or server_settings["socket"] != "")):
3064
parser.error("Needs port or socket to work without Zeroconf")
3066
1838
# For convenience
3067
1839
debug = server_settings["debug"]
3068
1840
debuglevel = server_settings["debuglevel"]
3069
1841
use_dbus = server_settings["use_dbus"]
3070
1842
use_ipv6 = server_settings["use_ipv6"]
3071
stored_state_path = os.path.join(server_settings["statedir"],
3073
foreground = server_settings["foreground"]
3074
zeroconf = server_settings["zeroconf"]
3077
initlogger(debug, logging.DEBUG)
3082
level = getattr(logging, debuglevel.upper())
3083
initlogger(debug, level)
3085
1844
if server_settings["servicename"] != "Mandos":
3086
syslogger.setFormatter(
3087
logging.Formatter('Mandos ({}) [%(process)d]:'
3088
' %(levelname)s: %(message)s'.format(
3089
server_settings["servicename"])))
1845
syslogger.setFormatter(logging.Formatter
1846
('Mandos (%s) [%%(process)d]:'
1847
' %%(levelname)s: %%(message)s'
1848
% server_settings["servicename"]))
3091
1850
# Parse config file with clients
3092
client_config = configparser.ConfigParser(Client.client_defaults)
1851
client_defaults = { "timeout": "5m",
1852
"extended_timeout": "15m",
1854
"checker": "fping -q -- %%(host)s",
1856
"approval_delay": "0s",
1857
"approval_duration": "1s",
1859
client_config = configparser.SafeConfigParser(client_defaults)
3093
1860
client_config.read(os.path.join(server_settings["configdir"],
3094
1861
"clients.conf"))
3096
1863
global mandos_dbus_service
3097
1864
mandos_dbus_service = None
3100
if server_settings["socket"] != "":
3101
socketfd = server_settings["socket"]
3102
tcp_server = MandosServer(
3103
(server_settings["address"], server_settings["port"]),
3105
interface=(server_settings["interface"] or None),
3107
gnutls_priority=server_settings["priority"],
3111
pidfilename = "/run/mandos.pid"
3112
if not os.path.isdir("/run/."):
3113
pidfilename = "/var/run/mandos.pid"
3116
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3117
except IOError as e:
3118
logger.error("Could not open file %r", pidfilename,
3121
for name, group in (("_mandos", "_mandos"),
3122
("mandos", "mandos"),
3123
("nobody", "nogroup")):
3125
uid = pwd.getpwnam(name).pw_uid
3126
gid = pwd.getpwnam(group).pw_gid
1866
tcp_server = MandosServer((server_settings["address"],
1867
server_settings["port"]),
1869
interface=(server_settings["interface"]
1873
server_settings["priority"],
1876
pidfilename = "/var/run/mandos.pid"
1878
pidfile = open(pidfilename, "w")
1880
logger.error("Could not open file %r", pidfilename)
1883
uid = pwd.getpwnam("_mandos").pw_uid
1884
gid = pwd.getpwnam("_mandos").pw_gid
1887
uid = pwd.getpwnam("mandos").pw_uid
1888
gid = pwd.getpwnam("mandos").pw_gid
3128
1889
except KeyError:
1891
uid = pwd.getpwnam("nobody").pw_uid
1892
gid = pwd.getpwnam("nobody").pw_gid
3137
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3139
1899
except OSError as error:
3140
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3141
.format(uid, gid, os.strerror(error.errno)))
3142
if error.errno != errno.EPERM:
1900
if error[0] != errno.EPERM:
1903
if not debug and not debuglevel:
1904
syslogger.setLevel(logging.WARNING)
1905
console.setLevel(logging.WARNING)
1907
level = getattr(logging, debuglevel.upper())
1908
syslogger.setLevel(level)
1909
console.setLevel(level)
3146
1912
# Enable all possible GnuTLS debugging
3148
1914
# "Use a log level over 10 to enable all debugging options."
3149
1915
# - GnuTLS manual
3150
gnutls.global_set_log_level(11)
1916
gnutls.library.functions.gnutls_global_set_log_level(11)
1918
@gnutls.library.types.gnutls_log_func
3153
1919
def debug_gnutls(level, string):
3154
1920
logger.debug("GnuTLS: %s", string[:-1])
3156
gnutls.global_set_log_function(debug_gnutls)
1922
(gnutls.library.functions
1923
.gnutls_global_set_log_function(debug_gnutls))
3158
1925
# Redirect stdin so all checkers get /dev/null
3159
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1926
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3160
1927
os.dup2(null, sys.stdin.fileno())
1931
# No console logging
1932
logger.removeHandler(console)
3164
1934
# Need to fork before connecting to D-Bus
3166
1936
# Close all input and output, do double fork, etc.
3169
if gi.version_info < (3, 10, 2):
3170
# multiprocessing will use threads, so before we use GLib we
3171
# need to inform GLib that threads will be used.
3174
1939
global main_loop
3175
1940
# From the Avahi example code
3176
DBusGMainLoop(set_as_default=True)
3177
main_loop = GLib.MainLoop()
1941
DBusGMainLoop(set_as_default=True )
1942
main_loop = gobject.MainLoop()
3178
1943
bus = dbus.SystemBus()
3179
1944
# End of Avahi example code
3182
bus_name = dbus.service.BusName("se.recompile.Mandos",
3185
old_bus_name = dbus.service.BusName(
3186
"se.bsnet.fukt.Mandos", bus,
3188
except dbus.exceptions.DBusException as e:
3189
logger.error("Disabling D-Bus:", exc_info=e)
1947
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1948
bus, do_not_queue=True)
1949
except dbus.exceptions.NameExistsException as e:
1950
logger.error(unicode(e) + ", disabling D-Bus")
3190
1951
use_dbus = False
3191
1952
server_settings["use_dbus"] = False
3192
1953
tcp_server.use_dbus = False
3194
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3195
service = AvahiServiceToSyslog(
3196
name=server_settings["servicename"],
3197
servicetype="_mandos._tcp",
3200
if server_settings["interface"]:
3201
service.interface = if_nametoindex(
3202
server_settings["interface"].encode("utf-8"))
1954
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1955
service = AvahiService(name = server_settings["servicename"],
1956
servicetype = "_mandos._tcp",
1957
protocol = protocol, bus = bus)
1958
if server_settings["interface"]:
1959
service.interface = (if_nametoindex
1960
(str(server_settings["interface"])))
3204
1962
global multiprocessing_manager
3205
1963
multiprocessing_manager = multiprocessing.Manager()
3207
1965
client_class = Client
3209
client_class = functools.partial(ClientDBus, bus=bus)
3211
client_settings = Client.config_parser(client_config)
3212
old_client_settings = {}
3215
# This is used to redirect stdout and stderr for checker processes
3217
wnull = open(os.devnull, "w") # A writable /dev/null
3218
# Only used if server is running in foreground but not in debug
3220
if debug or not foreground:
3223
# Get client data and settings from last running state.
3224
if server_settings["restore"]:
3226
with open(stored_state_path, "rb") as stored_state:
3227
if sys.version_info.major == 2:
3228
clients_data, old_client_settings = pickle.load(
3231
bytes_clients_data, bytes_old_client_settings = (
3232
pickle.load(stored_state, encoding="bytes"))
3233
# Fix bytes to strings
3236
clients_data = {(key.decode("utf-8")
3237
if isinstance(key, bytes)
3240
bytes_clients_data.items()}
3241
del bytes_clients_data
3242
for key in clients_data:
3243
value = {(k.decode("utf-8")
3244
if isinstance(k, bytes) else k): v
3246
clients_data[key].items()}
3247
clients_data[key] = value
3249
value["client_structure"] = [
3251
if isinstance(s, bytes)
3253
value["client_structure"]]
3255
for k in ("name", "host"):
3256
if isinstance(value[k], bytes):
3257
value[k] = value[k].decode("utf-8")
3258
if "key_id" not in value:
3259
value["key_id"] = ""
3260
elif "fingerprint" not in value:
3261
value["fingerprint"] = ""
3262
# old_client_settings
3264
old_client_settings = {
3265
(key.decode("utf-8")
3266
if isinstance(key, bytes)
3269
bytes_old_client_settings.items()}
3270
del bytes_old_client_settings
3272
for value in old_client_settings.values():
3273
if isinstance(value["host"], bytes):
3274
value["host"] = (value["host"]
3276
os.remove(stored_state_path)
3277
except IOError as e:
3278
if e.errno == errno.ENOENT:
3279
logger.warning("Could not load persistent state:"
3280
" {}".format(os.strerror(e.errno)))
3282
logger.critical("Could not load persistent state:",
3285
except EOFError as e:
3286
logger.warning("Could not load persistent state: "
3290
with PGPEngine() as pgp:
3291
for client_name, client in clients_data.items():
3292
# Skip removed clients
3293
if client_name not in client_settings:
3296
# Decide which value to use after restoring saved state.
3297
# We have three different values: Old config file,
3298
# new config file, and saved state.
3299
# New config value takes precedence if it differs from old
3300
# config value, otherwise use saved state.
3301
for name, value in client_settings[client_name].items():
3303
# For each value in new config, check if it
3304
# differs from the old config value (Except for
3305
# the "secret" attribute)
3306
if (name != "secret"
3308
old_client_settings[client_name][name])):
3309
client[name] = value
3313
# Clients who has passed its expire date can still be
3314
# enabled if its last checker was successful. A Client
3315
# whose checker succeeded before we stored its state is
3316
# assumed to have successfully run all checkers during
3318
if client["enabled"]:
3319
if datetime.datetime.utcnow() >= client["expires"]:
3320
if not client["last_checked_ok"]:
3322
"disabling client {} - Client never "
3323
"performed a successful checker".format(
3325
client["enabled"] = False
3326
elif client["last_checker_status"] != 0:
3328
"disabling client {} - Client last"
3329
" checker failed with error code"
3332
client["last_checker_status"]))
3333
client["enabled"] = False
3335
client["expires"] = (
3336
datetime.datetime.utcnow()
3337
+ client["timeout"])
3338
logger.debug("Last checker succeeded,"
3339
" keeping {} enabled".format(
1967
client_class = functools.partial(ClientDBus, bus = bus)
1968
def client_config_items(config, section):
1969
special_settings = {
1970
"approved_by_default":
1971
lambda: config.getboolean(section,
1972
"approved_by_default"),
1974
for name, value in config.items(section):
3342
client["secret"] = pgp.decrypt(
3343
client["encrypted_secret"],
3344
client_settings[client_name]["secret"])
3346
# If decryption fails, we use secret from new settings
3347
logger.debug("Failed to decrypt {} old secret".format(
3349
client["secret"] = (client_settings[client_name]
3352
# Add/remove clients based on new changes made to config
3353
for client_name in (set(old_client_settings)
3354
- set(client_settings)):
3355
del clients_data[client_name]
3356
for client_name in (set(client_settings)
3357
- set(old_client_settings)):
3358
clients_data[client_name] = client_settings[client_name]
3360
# Create all client objects
3361
for client_name, client in clients_data.items():
3362
tcp_server.clients[client_name] = client_class(
3365
server_settings=server_settings)
1976
yield (name, special_settings[name]())
1980
tcp_server.clients.update(set(
1981
client_class(name = section,
1982
config= dict(client_config_items(
1983
client_config, section)))
1984
for section in client_config.sections()))
3367
1985
if not tcp_server.clients:
3368
1986
logger.warning("No clients defined")
3371
if pidfile is not None:
3375
print(pid, file=pidfile)
3377
logger.error("Could not write to file %r with PID %d",
1992
pidfile.write(str(pid) + "\n".encode("utf-8"))
1995
logger.error("Could not write to file %r with PID %d",
1998
# "pidfile" was never created
3380
2000
del pidfilename
3382
for termsig in (signal.SIGHUP, signal.SIGTERM):
3383
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3384
lambda: main_loop.quit() and False)
2002
signal.signal(signal.SIGINT, signal.SIG_IGN)
2004
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2005
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3388
@alternate_dbus_interfaces(
3389
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3390
class MandosDBusService(DBusObjectWithObjectManager):
2008
class MandosDBusService(dbus.service.Object):
3391
2009
"""A D-Bus proxy object"""
3393
2010
def __init__(self):
3394
2011
dbus.service.Object.__init__(self, bus, "/")
3396
_interface = "se.recompile.Mandos"
2012
_interface = "se.bsnet.fukt.Mandos"
3398
2014
@dbus.service.signal(_interface, signature="o")
3399
2015
def ClientAdded(self, objpath):
3403
2019
@dbus.service.signal(_interface, signature="ss")
3404
def ClientNotFound(self, key_id, address):
2020
def ClientNotFound(self, fingerprint, address):
3408
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3410
2024
@dbus.service.signal(_interface, signature="os")
3411
2025
def ClientRemoved(self, objpath, name):
3415
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3417
2029
@dbus.service.method(_interface, out_signature="ao")
3418
2030
def GetAllClients(self):
3420
return dbus.Array(c.dbus_object_path for c in
3421
tcp_server.clients.values())
3423
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2032
return dbus.Array(c.dbus_object_path
2033
for c in tcp_server.clients)
3425
2035
@dbus.service.method(_interface,
3426
2036
out_signature="a{oa{sv}}")
3427
2037
def GetAllClientsWithProperties(self):
3429
2039
return dbus.Dictionary(
3430
{c.dbus_object_path: c.GetAll(
3431
"se.recompile.Mandos.Client")
3432
for c in tcp_server.clients.values()},
2040
((c.dbus_object_path, c.GetAll(""))
2041
for c in tcp_server.clients),
3433
2042
signature="oa{sv}")
3435
2044
@dbus.service.method(_interface, in_signature="o")
3436
2045
def RemoveClient(self, object_path):
3438
for c in tcp_server.clients.values():
2047
for c in tcp_server.clients:
3439
2048
if c.dbus_object_path == object_path:
3440
del tcp_server.clients[c.name]
2049
tcp_server.clients.remove(c)
3441
2050
c.remove_from_connection()
3442
# Don't signal the disabling
2051
# Don't signal anything except ClientRemoved
3443
2052
c.disable(quiet=True)
3444
# Emit D-Bus signal for removal
3445
self.client_removed_signal(c)
2054
self.ClientRemoved(object_path, c.name)
3447
2056
raise KeyError(object_path)
3451
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3452
out_signature="a{oa{sa{sv}}}")
3453
def GetManagedObjects(self):
3455
return dbus.Dictionary(
3456
{client.dbus_object_path:
3458
{interface: client.GetAll(interface)
3460
client._get_all_interface_names()})
3461
for client in tcp_server.clients.values()})
3463
def client_added_signal(self, client):
3464
"""Send the new standard signal and the old signal"""
3466
# New standard signal
3467
self.InterfacesAdded(
3468
client.dbus_object_path,
3470
{interface: client.GetAll(interface)
3472
client._get_all_interface_names()}))
3474
self.ClientAdded(client.dbus_object_path)
3476
def client_removed_signal(self, client):
3477
"""Send the new standard signal and the old signal"""
3479
# New standard signal
3480
self.InterfacesRemoved(
3481
client.dbus_object_path,
3482
client._get_all_interface_names())
3484
self.ClientRemoved(client.dbus_object_path,
3487
2060
mandos_dbus_service = MandosDBusService()
3489
# Save modules to variables to exempt the modules from being
3490
# unloaded before the function registered with atexit() is run.
3491
mp = multiprocessing
3495
2063
"Cleanup function; run on exit"
3499
mp.active_children()
3501
if not (tcp_server.clients or client_settings):
3504
# Store client before exiting. Secrets are encrypted with key
3505
# based on what config file has. If config file is
3506
# removed/edited, old secret will thus be unrecovable.
3508
with PGPEngine() as pgp:
3509
for client in tcp_server.clients.values():
3510
key = client_settings[client.name]["secret"]
3511
client.encrypted_secret = pgp.encrypt(client.secret,
3515
# A list of attributes that can not be pickled
3517
exclude = {"bus", "changedstate", "secret",
3518
"checker", "server_settings"}
3519
for name, typ in inspect.getmembers(dbus.service
3523
client_dict["encrypted_secret"] = (client
3525
for attr in client.client_structure:
3526
if attr not in exclude:
3527
client_dict[attr] = getattr(client, attr)
3529
clients[client.name] = client_dict
3530
del client_settings[client.name]["secret"]
3533
with tempfile.NamedTemporaryFile(
3537
dir=os.path.dirname(stored_state_path),
3538
delete=False) as stored_state:
3539
pickle.dump((clients, client_settings), stored_state,
3541
tempname = stored_state.name
3542
os.rename(tempname, stored_state_path)
3543
except (IOError, OSError) as e:
3549
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3550
logger.warning("Could not save persistent state: {}"
3551
.format(os.strerror(e.errno)))
3553
logger.warning("Could not save persistent state:",
3557
# Delete all clients, and settings from config
3558
2066
while tcp_server.clients:
3559
name, client = tcp_server.clients.popitem()
2067
client = tcp_server.clients.pop()
3561
2069
client.remove_from_connection()
3562
# Don't signal the disabling
2070
client.disable_hook = None
2071
# Don't signal anything except ClientRemoved
3563
2072
client.disable(quiet=True)
3564
# Emit D-Bus signal for removal
3566
mandos_dbus_service.client_removed_signal(client)
3567
client_settings.clear()
2075
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
3569
2078
atexit.register(cleanup)
3571
for client in tcp_server.clients.values():
2080
for client in tcp_server.clients:
3573
# Emit D-Bus signal for adding
3574
mandos_dbus_service.client_added_signal(client)
3575
# Need to initiate checking of clients
3577
client.init_checker()
2083
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3579
2086
tcp_server.enable()
3580
2087
tcp_server.server_activate()
3582
2089
# Find out what port we got
3584
service.port = tcp_server.socket.getsockname()[1]
2090
service.port = tcp_server.socket.getsockname()[1]
3586
2092
logger.info("Now listening on address %r, port %d,"
3587
" flowinfo %d, scope_id %d",
3588
*tcp_server.socket.getsockname())
2093
" flowinfo %d, scope_id %d"
2094
% tcp_server.socket.getsockname())
3590
logger.info("Now listening on address %r, port %d",
3591
*tcp_server.socket.getsockname())
3593
# service.interface = tcp_server.socket.getsockname()[3]
2096
logger.info("Now listening on address %r, port %d"
2097
% tcp_server.socket.getsockname())
2099
#service.interface = tcp_server.socket.getsockname()[3]
3597
# From the Avahi example code
3600
except dbus.exceptions.DBusException as error:
3601
logger.critical("D-Bus Exception", exc_info=error)
3604
# End of Avahi example code
3607
GLib.IOChannel.unix_new(tcp_server.fileno()),
3608
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
3609
lambda *args, **kwargs: (tcp_server.handle_request
3610
(*args[2:], **kwargs) or True))
2102
# From the Avahi example code
2105
except dbus.exceptions.DBusException as error:
2106
logger.critical("DBusException: %s", error)
2109
# End of Avahi example code
2111
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2112
lambda *args, **kwargs:
2113
(tcp_server.handle_request
2114
(*args[2:], **kwargs) or True))
3612
2116
logger.debug("Starting main loop")
3613
2117
main_loop.run()
3614
2118
except AvahiError as error:
3615
logger.critical("Avahi Error", exc_info=error)
2119
logger.critical("AvahiError: %s", error)
3618
2122
except KeyboardInterrupt: