70
import cPickle as pickle
63
import cPickle as pickle
73
64
import multiprocessing
83
68
import dbus.service
85
from gi.repository import GLib
86
71
from dbus.mainloop.glib import DBusGMainLoop
89
74
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
78
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
105
79
except AttributeError:
107
# This is where SO_BINDTODEVICE was up to and including Python
109
81
from IN import SO_BINDTODEVICE
110
82
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 == b"gpg" or self.gpg.endswith(b"/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
83
SO_BINDTODEVICE = None
88
#logger = logging.getLogger('mandos')
89
logger = logging.Logger('mandos')
90
syslogger = (logging.handlers.SysLogHandler
91
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
92
address = str("/dev/log")))
93
syslogger.setFormatter(logging.Formatter
94
('Mandos [%(process)d]: %(levelname)s:'
96
logger.addHandler(syslogger)
98
console = logging.StreamHandler()
99
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
102
logger.addHandler(console)
317
104
class AvahiError(Exception):
318
105
def __init__(self, value, *args, **kwargs):
319
106
self.value = value
320
return super(AvahiError, self).__init__(value, *args,
107
super(AvahiError, self).__init__(value, *args, **kwargs)
108
def __unicode__(self):
109
return unicode(repr(self.value))
324
111
class AvahiServiceError(AvahiError):
328
114
class AvahiGroupError(AvahiError):
118
class AvahiService(object):
333
119
"""An Avahi (Zeroconf) service.
336
122
interface: integer; avahi.IF_UNSPEC or an interface index.
337
123
Used to optionally bind to the specified interface.
338
124
name: string; Example: 'Mandos'
339
125
type: string; Example: '_mandos._tcp'.
340
See <https://www.iana.org/assignments/service-names-port-numbers>
126
See <http://www.dns-sd.org/ServiceTypes.html>
341
127
port: integer; what port to announce
342
128
TXT: list of strings; TXT record for the service
343
129
domain: string; Domain to publish on, default to .local if empty.
502
261
follow_name_owner_changes=True),
503
262
avahi.DBUS_INTERFACE_SERVER)
504
263
self.server.connect_to_signal("StateChanged",
505
self.server_state_changed)
264
self.server_state_changed)
506
265
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))
268
def _timedelta_to_milliseconds(td):
269
"Convert a datetime.timedelta() to milliseconds"
270
return ((td.days * 24 * 60 * 60 * 1000)
271
+ (td.seconds * 1000)
272
+ (td.microseconds // 1000))
274
class Client(object):
832
275
"""A representation of a client host served by this server.
835
approved: bool(); 'None' if not yet approved/disapproved
278
_approved: bool(); 'None' if not yet approved/disapproved
836
279
approval_delay: datetime.timedelta(); Time to wait for approval
837
280
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
281
checker: subprocess.Popen(); a running checker process used
282
to see if the client lives.
283
'None' if no process is running.
284
checker_callback_tag: a gobject event source tag, or None
842
285
checker_command: string; External command which is run to check
843
286
if client lives. %() expansions are done at
844
287
runtime with vars(self) as dict, so that for
845
288
instance %(name)s can be used in the command.
846
checker_initiator_tag: a GLib event source tag, or None
289
checker_initiator_tag: a gobject event source tag, or None
847
290
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
291
current_checker_command: string; current running checker_command
851
disable_initiator_tag: a GLib event source tag, or None
292
disable_hook: If set, called by disable() as disable_hook(self)
293
disable_initiator_tag: a gobject event source tag, or None
853
295
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
296
uniquely identify the client
857
297
host: string; available for use by the checker command
858
298
interval: datetime.timedelta(); How often to start a new checker
859
299
last_approval_request: datetime.datetime(); (UTC) or None
860
300
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
301
last_enabled: datetime.datetime(); (UTC)
867
302
name: string; from the config file, used in log messages and
868
303
D-Bus identifiers
869
304
secret: bytestring; sent verbatim (over TLS) to client
870
305
timeout: datetime.timedelta(); How long from last_checked_ok
871
306
until this client is disabled
872
extended_timeout: extra long timeout when secret has been sent
307
extended_timeout: extra long timeout when password has been sent
873
308
runtime_expansions: Allowed attributes for runtime expansion.
874
309
expires: datetime.datetime(); time (UTC) when a client will be
875
310
disabled, or None
876
server_settings: The server_settings dict from main()
879
313
runtime_expansions = ("approval_delay", "approval_duration",
880
"created", "enabled", "expires", "key_id",
881
"fingerprint", "host", "interval",
882
"last_approval_request", "last_checked_ok",
314
"created", "enabled", "fingerprint",
315
"host", "interval", "last_checked_ok",
883
316
"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):
318
def timeout_milliseconds(self):
319
"Return the 'timeout' attribute in milliseconds"
320
return _timedelta_to_milliseconds(self.timeout)
322
def extended_timeout_milliseconds(self):
323
"Return the 'extended_timeout' attribute in milliseconds"
324
return _timedelta_to_milliseconds(self.extended_timeout)
326
def interval_milliseconds(self):
327
"Return the 'interval' attribute in milliseconds"
328
return _timedelta_to_milliseconds(self.interval)
330
def approval_delay_milliseconds(self):
331
return _timedelta_to_milliseconds(self.approval_delay)
333
def __init__(self, name = None, disable_hook=None, config=None):
334
"""Note: the 'checker' key in 'config' sets the
335
'checker_command' attribute and *not* the 'checker'
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
# Schedule a new checker to be started an 'interval' from now,
397
# and every interval from then on.
398
self.checker_initiator_tag = (gobject.timeout_add
399
(self.interval_milliseconds(),
401
# Schedule a disable() when 'timeout' has passed
1005
402
self.expires = datetime.datetime.utcnow() + self.timeout
403
self.disable_initiator_tag = (gobject.timeout_add
404
(self.timeout_milliseconds(),
1006
406
self.enabled = True
1007
407
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()
1056
if self.checker is not None:
1058
439
self.checker_callback_tag = None
1059
440
self.checker = None
1062
self.last_checker_status = returncode
1063
self.last_checker_signal = None
1064
if self.last_checker_status == 0:
441
if os.WIFEXITED(condition):
442
exitstatus = os.WEXITSTATUS(condition)
1065
444
logger.info("Checker for %(name)s succeeded",
1067
446
self.checked_ok()
1069
logger.info("Checker for %(name)s failed", vars(self))
448
logger.info("Checker for %(name)s failed",
1071
self.last_checker_status = -1
1072
self.last_checker_signal = -returncode
1073
451
logger.warning("Checker for %(name)s crashed?",
1077
def checked_ok(self):
1078
"""Assert that the client has been seen, alive and well."""
1079
self.last_checked_ok = datetime.datetime.utcnow()
1080
self.last_checker_status = 0
1081
self.last_checker_signal = None
1084
def bump_timeout(self, timeout=None):
1085
"""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,
1086
460
if timeout is None:
1087
461
timeout = self.timeout
1088
if self.disable_initiator_tag is not None:
1089
GLib.source_remove(self.disable_initiator_tag)
1090
self.disable_initiator_tag = None
1091
if getattr(self, "enabled", False):
1092
self.disable_initiator_tag = GLib.timeout_add(
1093
int(timeout.total_seconds() * 1000), self.disable)
1094
self.expires = datetime.datetime.utcnow() + timeout
462
self.last_checked_ok = datetime.datetime.utcnow()
463
gobject.source_remove(self.disable_initiator_tag)
464
self.expires = datetime.datetime.utcnow() + timeout
465
self.disable_initiator_tag = (gobject.timeout_add
466
(_timedelta_to_milliseconds(timeout),
1096
469
def need_approval(self):
1097
470
self.last_approval_request = datetime.datetime.utcnow()
1099
472
def start_checker(self):
1100
473
"""Start a new checker subprocess if one is not running.
1102
475
If a checker already exists, leave it running and do
1104
477
# The reason for not killing a running checker is that if we
1105
# did that, and if a checker (for some reason) started running
1106
# slowly and taking more than 'interval' time, then the client
1107
# would inevitably timeout, since no checker would get a
1108
# 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
1109
482
# checkers alone, the checker would have to take more time
1110
483
# than 'timeout' for the client to be disabled, which is as it
1113
if self.checker is not None and not self.checker.is_alive():
1114
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)
1117
499
# Start a new checker if needed
1118
500
if self.checker is None:
1119
# Escape attributes for the shell
1121
attr: re.escape(str(getattr(self, attr)))
1122
for attr in self.runtime_expansions}
1124
command = self.checker_command % escaped_attrs
1125
except TypeError as error:
1126
logger.error('Could not format string "%s"',
1127
self.checker_command,
1129
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
1130
520
self.current_checker_command = command
1131
logger.info("Starting checker %r for %s", command,
1133
# We don't need to redirect stdout and stderr, since
1134
# in normal mode, that is already done by daemon(),
1135
# and in debug mode we don't want to. (Stdin is
1136
# always replaced by /dev/null.)
1137
# The exception is when not debugging but nevertheless
1138
# running in the foreground; use the previously
1140
popen_args = {"close_fds": True,
1143
if (not self.server_settings["debug"]
1144
and self.server_settings["foreground"]):
1145
popen_args.update({"stdout": wnull,
1147
pipe = multiprocessing.Pipe(duplex=False)
1148
self.checker = multiprocessing.Process(
1150
args=(pipe[1], subprocess.call, command),
1152
self.checker.start()
1153
self.checker_callback_tag = GLib.io_add_watch(
1154
GLib.IOChannel.unix_new(pipe[0].fileno()),
1155
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
1156
self.checker_callback, pipe[0], command)
1157
# 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
1160
547
def stop_checker(self):
1161
548
"""Force the checker process, if any, to stop."""
1162
549
if self.checker_callback_tag:
1163
GLib.source_remove(self.checker_callback_tag)
550
gobject.source_remove(self.checker_callback_tag)
1164
551
self.checker_callback_tag = None
1165
552
if getattr(self, "checker", None) is None:
1167
554
logger.debug("Stopping checker for %(name)s", vars(self))
1168
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
1169
563
self.checker = None
1172
def dbus_service_property(dbus_interface,
566
def dbus_service_property(dbus_interface, signature="v",
567
access="readwrite", byte_arrays=False):
1176
568
"""Decorators for marking methods of a DBusObjectWithProperties to
1177
569
become properties on the D-Bus.
1179
571
The decorated method will be called with no arguments by "Get"
1180
572
and with one argument by "Set".
1182
574
The parameters, where they are supported, are the same as
1183
575
dbus.service.method, except there is only "signature", since the
1184
576
type from Get() and the type sent to Set() is the same.
1517
743
except (AttributeError, xml.dom.DOMException,
1518
744
xml.parsers.expat.ExpatError) as error:
1519
745
logger.error("Failed to override Introspection method",
1525
dbus.OBJECT_MANAGER_IFACE
1526
except AttributeError:
1527
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1530
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1531
"""A D-Bus object with an ObjectManager.
1533
Classes inheriting from this exposes the standard
1534
GetManagedObjects call and the InterfacesAdded and
1535
InterfacesRemoved signals on the standard
1536
"org.freedesktop.DBus.ObjectManager" interface.
1538
Note: No signals are sent automatically; they must be sent
1541
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1542
out_signature="a{oa{sa{sv}}}")
1543
def GetManagedObjects(self):
1544
"""This function must be overridden"""
1545
raise NotImplementedError()
1547
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1548
signature="oa{sa{sv}}")
1549
def InterfacesAdded(self, object_path, interfaces_and_properties):
1552
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1553
def InterfacesRemoved(self, object_path, interfaces):
1556
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1558
path_keyword='object_path',
1559
connection_keyword='connection')
1560
def Introspect(self, object_path, connection):
1561
"""Overloading of standard D-Bus method.
1563
Override return argument name of GetManagedObjects to be
1564
"objpath_interfaces_and_properties"
1566
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1570
document = xml.dom.minidom.parseString(xmlstring)
1572
for if_tag in document.getElementsByTagName("interface"):
1573
# Fix argument name for the GetManagedObjects method
1574
if (if_tag.getAttribute("name")
1575
== dbus.OBJECT_MANAGER_IFACE):
1576
for cn in if_tag.getElementsByTagName("method"):
1577
if (cn.getAttribute("name")
1578
== "GetManagedObjects"):
1579
for arg in cn.getElementsByTagName("arg"):
1580
if (arg.getAttribute("direction")
1584
"objpath_interfaces"
1586
xmlstring = document.toxml("utf-8")
1588
except (AttributeError, xml.dom.DOMException,
1589
xml.parsers.expat.ExpatError) as error:
1590
logger.error("Failed to override Introspection method",
1595
def datetime_to_dbus(dt, variant_level=0):
750
def datetime_to_dbus (dt, variant_level=0):
1596
751
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1598
return dbus.String("", variant_level=variant_level)
1599
return dbus.String(dt.isoformat(), variant_level=variant_level)
1602
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1603
"""A class decorator; applied to a subclass of
1604
dbus.service.Object, it will add alternate D-Bus attributes with
1605
interface names according to the "alt_interface_names" mapping.
1608
@alternate_dbus_interfaces({"org.example.Interface":
1609
"net.example.AlternateInterface"})
1610
class SampleDBusObject(dbus.service.Object):
1611
@dbus.service.method("org.example.Interface")
1612
def SampleDBusMethod():
1615
The above "SampleDBusMethod" on "SampleDBusObject" will be
1616
reachable via two interfaces: "org.example.Interface" and
1617
"net.example.AlternateInterface", the latter of which will have
1618
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1619
"true", unless "deprecate" is passed with a False value.
1621
This works for methods and signals, and also for D-Bus properties
1622
(from DBusObjectWithProperties) and interfaces (from the
1623
dbus_interface_annotations decorator).
753
return dbus.String("", variant_level = variant_level)
754
return dbus.String(dt.isoformat(),
755
variant_level=variant_level)
757
class AlternateDBusNamesMetaclass(DBusObjectWithProperties.__metaclass__):
758
"""Applied to an empty subclass of a D-Bus object, this metaclass
759
will add additional D-Bus attributes matching a certain pattern.
1627
for orig_interface_name, alt_interface_name in (
1628
alt_interface_names.items()):
1630
interface_names = set()
1631
# Go though all attributes of the class
1632
for attrname, attribute in inspect.getmembers(cls):
761
def __new__(mcs, name, bases, attr):
762
# Go through all the base classes which could have D-Bus
763
# methods, signals, or properties in them
764
for base in (b for b in bases
765
if issubclass(b, dbus.service.Object)):
766
# Go though all attributes of the base class
767
for attrname, attribute in inspect.getmembers(base):
1633
768
# Ignore non-D-Bus attributes, and D-Bus attributes
1634
769
# with the wrong interface name
1635
770
if (not hasattr(attribute, "_dbus_interface")
1636
or not attribute._dbus_interface.startswith(
1637
orig_interface_name)):
771
or not attribute._dbus_interface
772
.startswith("se.recompile.Mandos")):
1639
774
# Create an alternate D-Bus interface name based on
1640
775
# the current name
1641
alt_interface = attribute._dbus_interface.replace(
1642
orig_interface_name, alt_interface_name)
1643
interface_names.add(alt_interface)
776
alt_interface = (attribute._dbus_interface
777
.replace("se.recompile.Mandos",
778
"se.bsnet.fukt.Mandos"))
1644
779
# Is this a D-Bus signal?
1645
780
if getattr(attribute, "_dbus_is_signal", False):
1646
# Extract the original non-method undecorated
1647
# function by black magic
1648
if sys.version_info.major == 2:
1649
nonmethod_func = (dict(
781
# Extract the original non-method function by
783
nonmethod_func = (dict(
1650
784
zip(attribute.func_code.co_freevars,
1651
attribute.__closure__))
1652
["func"].cell_contents)
1654
nonmethod_func = (dict(
1655
zip(attribute.__code__.co_freevars,
1656
attribute.__closure__))
1657
["func"].cell_contents)
785
attribute.__closure__))["func"]
1658
787
# Create a new, but exactly alike, function
1659
788
# object, and decorate it to be a new D-Bus signal
1660
789
# with the alternate D-Bus interface name
1661
new_function = copy_function(nonmethod_func)
1662
new_function = (dbus.service.signal(
1664
attribute._dbus_signature)(new_function))
1665
# Copy annotations, if any
1667
new_function._dbus_annotations = dict(
1668
attribute._dbus_annotations)
1669
except AttributeError:
790
new_function = (dbus.service.signal
792
attribute._dbus_signature)
794
nonmethod_func.func_code,
795
nonmethod_func.func_globals,
796
nonmethod_func.func_name,
797
nonmethod_func.func_defaults,
798
nonmethod_func.func_closure)))
1672
799
# Define a creator of a function to call both the
1673
# original and alternate functions, so both the
1674
# original and alternate signals gets sent when
1675
# the function is called
800
# old and new functions, so both the old and new
801
# signals gets sent when the function is called
1676
802
def fixscope(func1, func2):
1677
803
"""This function is a scope container to pass
1678
804
func1 and func2 to the "call_both" function
1679
805
outside of its arguments"""
1681
@functools.wraps(func2)
1682
806
def call_both(*args, **kwargs):
1683
807
"""This function will emit two D-Bus
1684
808
signals by calling func1 and func2"""
1685
809
func1(*args, **kwargs)
1686
810
func2(*args, **kwargs)
1687
# Make wrapper function look like a D-Bus
1689
for name, attr in inspect.getmembers(func2):
1690
if name.startswith("_dbus_"):
1691
setattr(call_both, name, attr)
1693
811
return call_both
1694
812
# Create the "call_both" function and add it to
1696
attr[attrname] = fixscope(attribute, new_function)
814
attr[attrname] = fixscope(attribute,
1697
816
# Is this a D-Bus method?
1698
817
elif getattr(attribute, "_dbus_is_method", False):
1699
818
# Create a new, but exactly alike, function
1700
819
# object. Decorate it to be a new D-Bus method
1701
820
# with the alternate D-Bus interface name. Add it
1704
dbus.service.method(
1706
attribute._dbus_in_signature,
1707
attribute._dbus_out_signature)
1708
(copy_function(attribute)))
1709
# Copy annotations, if any
1711
attr[attrname]._dbus_annotations = dict(
1712
attribute._dbus_annotations)
1713
except AttributeError:
822
attr[attrname] = (dbus.service.method
824
attribute._dbus_in_signature,
825
attribute._dbus_out_signature)
827
(attribute.func_code,
828
attribute.func_globals,
830
attribute.func_defaults,
831
attribute.func_closure)))
1715
832
# Is this a D-Bus property?
1716
833
elif getattr(attribute, "_dbus_is_property", False):
1717
834
# Create a new, but exactly alike, function
1718
835
# object, and decorate it to be a new D-Bus
1719
836
# property with the alternate D-Bus interface
1720
837
# name. Add it to the class.
1721
attr[attrname] = (dbus_service_property(
1722
alt_interface, attribute._dbus_signature,
1723
attribute._dbus_access,
1724
attribute._dbus_get_args_options
1726
(copy_function(attribute)))
1727
# Copy annotations, if any
1729
attr[attrname]._dbus_annotations = dict(
1730
attribute._dbus_annotations)
1731
except AttributeError:
1733
# Is this a D-Bus interface?
1734
elif getattr(attribute, "_dbus_is_interface", False):
1735
# Create a new, but exactly alike, function
1736
# object. Decorate it to be a new D-Bus interface
1737
# with the alternate D-Bus interface name. Add it
1740
dbus_interface_annotations(alt_interface)
1741
(copy_function(attribute)))
1743
# Deprecate all alternate interfaces
1744
iname = "_AlternateDBusNames_interface_annotation{}"
1745
for interface_name in interface_names:
1747
@dbus_interface_annotations(interface_name)
1749
return {"org.freedesktop.DBus.Deprecated":
1751
# Find an unused name
1752
for aname in (iname.format(i)
1753
for i in itertools.count()):
1754
if aname not in attr:
1758
# Replace the class with a new subclass of it with
1759
# methods, signals, etc. as created above.
1760
if sys.version_info.major == 2:
1761
cls = type(b"{}Alternate".format(cls.__name__),
1764
cls = type("{}Alternate".format(cls.__name__),
1771
@alternate_dbus_interfaces({"se.recompile.Mandos":
1772
"se.bsnet.fukt.Mandos"})
838
attr[attrname] = (dbus_service_property
840
attribute._dbus_signature,
841
attribute._dbus_access,
843
._dbus_get_args_options
846
(attribute.func_code,
847
attribute.func_globals,
849
attribute.func_defaults,
850
attribute.func_closure)))
851
return type.__new__(mcs, name, bases, attr)
1773
853
class ClientDBus(Client, DBusObjectWithProperties):
1774
854
"""A Client class using D-Bus
1777
857
dbus_object_path: dbus.ObjectPath
1778
858
bus: dbus.SystemBus()
1781
861
runtime_expansions = (Client.runtime_expansions
1782
+ ("dbus_object_path", ))
1784
_interface = "se.recompile.Mandos.Client"
862
+ ("dbus_object_path",))
1786
864
# dbus.service.Object doesn't use super(), so we can't either.
1788
def __init__(self, bus=None, *args, **kwargs):
866
def __init__(self, bus = None, *args, **kwargs):
867
self._approvals_pending = 0
1790
869
Client.__init__(self, *args, **kwargs)
1791
870
# Only now, when this client is initialized, can it show up on
1793
client_object_name = str(self.name).translate(
872
client_object_name = unicode(self.name).translate(
1794
873
{ord("."): ord("_"),
1795
874
ord("-"): ord("_")})
1796
self.dbus_object_path = dbus.ObjectPath(
1797
"/clients/" + client_object_name)
875
self.dbus_object_path = (dbus.ObjectPath
876
("/clients/" + client_object_name))
1798
877
DBusObjectWithProperties.__init__(self, self.bus,
1799
878
self.dbus_object_path)
1801
def notifychangeproperty(transform_func, dbus_name,
1802
type_func=lambda x: x,
1804
invalidate_only=False,
1805
_interface=_interface):
880
def notifychangeproperty(transform_func,
881
dbus_name, type_func=lambda x: x,
1806
883
""" Modify a variable so that it's a property which announces
1807
884
its changes to DBus.
1809
transform_fun: Function that takes a value and a variant_level
1810
and transforms it to a D-Bus type.
886
transform_fun: Function that takes a value and transforms it
1811
888
dbus_name: D-Bus name of the variable
1812
889
type_func: Function that transform the value before sending it
1813
890
to the D-Bus. Default: no transform
1814
891
variant_level: D-Bus variant level. Default: 1
1816
attrname = "_{}".format(dbus_name)
1818
894
def setter(self, value):
895
old_value = real_value[0]
896
real_value[0] = value
1819
897
if hasattr(self, "dbus_object_path"):
1820
if (not hasattr(self, attrname) or
1821
type_func(getattr(self, attrname, None))
1822
!= type_func(value)):
1824
self.PropertiesChanged(
1825
_interface, dbus.Dictionary(),
1826
dbus.Array((dbus_name, )))
1828
dbus_value = transform_func(
1830
variant_level=variant_level)
1831
self.PropertyChanged(dbus.String(dbus_name),
1833
self.PropertiesChanged(
1835
dbus.Dictionary({dbus.String(dbus_name):
1838
setattr(self, attrname, value)
1840
return property(lambda self: getattr(self, attrname), setter)
898
if type_func(old_value) != type_func(real_value[0]):
899
dbus_value = transform_func(type_func(real_value[0]),
901
self.PropertyChanged(dbus.String(dbus_name),
904
return property(lambda self: real_value[0], setter)
1842
907
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1843
908
approvals_pending = notifychangeproperty(dbus.Boolean,
1844
909
"ApprovalPending",
1846
911
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1847
912
last_enabled = notifychangeproperty(datetime_to_dbus,
1849
checker = notifychangeproperty(
1850
dbus.Boolean, "CheckerRunning",
1851
type_func=lambda checker: checker is not None)
914
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
915
type_func = lambda checker: checker is not None)
1852
916
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1853
917
"LastCheckedOK")
1854
last_checker_status = notifychangeproperty(dbus.Int16,
1855
"LastCheckerStatus")
1856
last_approval_request = notifychangeproperty(
1857
datetime_to_dbus, "LastApprovalRequest")
918
last_approval_request = notifychangeproperty(datetime_to_dbus,
919
"LastApprovalRequest")
1858
920
approved_by_default = notifychangeproperty(dbus.Boolean,
1859
921
"ApprovedByDefault")
1860
approval_delay = notifychangeproperty(
1861
dbus.UInt64, "ApprovalDelay",
1862
type_func=lambda td: td.total_seconds() * 1000)
1863
approval_duration = notifychangeproperty(
1864
dbus.UInt64, "ApprovalDuration",
1865
type_func=lambda td: td.total_seconds() * 1000)
922
approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",
923
type_func = _timedelta_to_milliseconds)
924
approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",
925
type_func = _timedelta_to_milliseconds)
1866
926
host = notifychangeproperty(dbus.String, "Host")
1867
timeout = notifychangeproperty(
1868
dbus.UInt64, "Timeout",
1869
type_func=lambda td: td.total_seconds() * 1000)
1870
extended_timeout = notifychangeproperty(
1871
dbus.UInt64, "ExtendedTimeout",
1872
type_func=lambda td: td.total_seconds() * 1000)
1873
interval = notifychangeproperty(
1874
dbus.UInt64, "Interval",
1875
type_func=lambda td: td.total_seconds() * 1000)
927
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
928
type_func = _timedelta_to_milliseconds)
929
extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",
930
type_func = _timedelta_to_milliseconds)
931
interval = notifychangeproperty(dbus.UInt16, "Interval",
932
type_func = _timedelta_to_milliseconds)
1876
933
checker_command = notifychangeproperty(dbus.String, "Checker")
1877
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1878
invalidate_only=True)
1880
935
del notifychangeproperty
1882
937
def __del__(self, *args, **kwargs):
1884
939
self.remove_from_connection()
2202
1226
self.start_checker()
2204
1228
self.stop_checker()
2206
1230
# ObjectPath - property
2208
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2209
"org.freedesktop.DBus.Deprecated": "true"})
2210
1231
@dbus_service_property(_interface, signature="o", access="read")
2211
1232
def ObjectPath_dbus_property(self):
2212
return self.dbus_object_path # is already a dbus.ObjectPath
1233
return self.dbus_object_path # is already a dbus.ObjectPath
2214
1235
# Secret = property
2216
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2218
@dbus_service_property(_interface,
1236
@dbus_service_property(_interface, signature="ay",
1237
access="write", byte_arrays=True)
2222
1238
def Secret_dbus_property(self, value):
2223
self.secret = bytes(value)
1239
self.secret = str(value)
2229
def __init__(self, child_pipe, key_id, fpr, address):
1244
class ProxyClient(object):
1245
def __init__(self, child_pipe, fpr, address):
2230
1246
self._pipe = child_pipe
2231
self._pipe.send(('init', key_id, fpr, address))
1247
self._pipe.send(('init', fpr, address))
2232
1248
if not self._pipe.recv():
2233
raise KeyError(key_id or fpr)
2235
1251
def __getattribute__(self, name):
1252
if(name == '_pipe'):
2237
1253
return super(ProxyClient, self).__getattribute__(name)
2238
1254
self._pipe.send(('getattr', name))
2239
1255
data = self._pipe.recv()
2240
1256
if data[0] == 'data':
2242
1258
if data[0] == 'function':
2244
1259
def func(*args, **kwargs):
2245
1260
self._pipe.send(('funcall', name, args, kwargs))
2246
1261
return self._pipe.recv()[1]
2250
1264
def __setattr__(self, name, value):
1265
if(name == '_pipe'):
2252
1266
return super(ProxyClient, self).__setattr__(name, value)
2253
1267
self._pipe.send(('setattr', name, value))
1269
class ClientDBusTransitional(ClientDBus):
1270
__metaclass__ = AlternateDBusNamesMetaclass
2256
1272
class ClientHandler(socketserver.BaseRequestHandler, object):
2257
1273
"""A class to handle client connections.
2259
1275
Instantiated once for each connection to handle it.
2260
1276
Note: This will run in its own forked process."""
2262
1278
def handle(self):
2263
1279
with contextlib.closing(self.server.child_pipe) as child_pipe:
2264
1280
logger.info("TCP connection from: %s",
2265
str(self.client_address))
1281
unicode(self.client_address))
2266
1282
logger.debug("Pipe FD: %d",
2267
1283
self.server.child_pipe.fileno())
2269
session = gnutls.ClientSession(self.request)
2271
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2272
# "+AES-256-CBC", "+SHA1",
2273
# "+COMP-NULL", "+CTYPE-OPENPGP",
1285
session = (gnutls.connection
1286
.ClientSession(self.request,
1288
.X509Credentials()))
1290
# Note: gnutls.connection.X509Credentials is really a
1291
# generic GnuTLS certificate credentials object so long as
1292
# no X.509 keys are added to it. Therefore, we can use it
1293
# here despite using OpenPGP certificates.
1295
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1296
# "+AES-256-CBC", "+SHA1",
1297
# "+COMP-NULL", "+CTYPE-OPENPGP",
2275
1299
# Use a fallback default, since this MUST be set.
2276
1300
priority = self.server.gnutls_priority
2277
1301
if priority is None:
2278
1302
priority = "NORMAL"
2279
gnutls.priority_set_direct(session._c_object,
2280
priority.encode("utf-8"),
1303
(gnutls.library.functions
1304
.gnutls_priority_set_direct(session._c_object,
2283
1307
# Start communication using the Mandos protocol
2284
1308
# Get protocol number
2285
1309
line = self.request.makefile().readline()
2286
1310
logger.debug("Protocol version: %r", line)
2288
1312
if int(line.strip().split()[0]) > 1:
2289
raise RuntimeError(line)
2290
1314
except (ValueError, IndexError, RuntimeError) as error:
2291
1315
logger.error("Unknown protocol version: %s", error)
2294
1318
# Start GnuTLS connection
2296
1320
session.handshake()
2297
except gnutls.Error as error:
1321
except gnutls.errors.GNUTLSError as error:
2298
1322
logger.warning("Handshake failed: %s", error)
2299
1323
# Do not run session.bye() here: the session is not
2300
1324
# established. Just abandon the request.
2302
1326
logger.debug("Handshake succeeded")
2304
1328
approval_required = False
2306
if gnutls.has_rawpk:
2309
key_id = self.key_id(
2310
self.peer_certificate(session))
2311
except (TypeError, gnutls.Error) as error:
2312
logger.warning("Bad certificate: %s", error)
2314
logger.debug("Key ID: %s", key_id)
2319
fpr = self.fingerprint(
2320
self.peer_certificate(session))
2321
except (TypeError, gnutls.Error) as error:
2322
logger.warning("Bad certificate: %s", error)
2324
logger.debug("Fingerprint: %s", fpr)
2327
client = ProxyClient(child_pipe, key_id, fpr,
1331
fpr = self.fingerprint(self.peer_certificate
1334
gnutls.errors.GNUTLSError) as error:
1335
logger.warning("Bad certificate: %s", error)
1337
logger.debug("Fingerprint: %s", fpr)
1340
client = ProxyClient(child_pipe, fpr,
2328
1341
self.client_address)
2329
1342
except KeyError:
2332
1345
if client.approval_delay:
2333
1346
delay = client.approval_delay
2334
1347
client.approvals_pending += 1
2335
1348
approval_required = True
2338
1351
if not client.enabled:
2339
1352
logger.info("Client %s is disabled",
2341
1354
if self.server.use_dbus:
2342
1355
# Emit D-Bus signal
2343
client.Rejected("Disabled")
1356
client.Rejected("Disabled")
2346
if client.approved or not client.approval_delay:
2347
# We are approved or approval is disabled
1359
if client._approved or not client.approval_delay:
1360
#We are approved or approval is disabled
2349
elif client.approved is None:
1362
elif client._approved is None:
2350
1363
logger.info("Client %s needs approval",
2352
1365
if self.server.use_dbus:
2353
1366
# Emit D-Bus signal
2354
1367
client.NeedApproval(
2355
client.approval_delay.total_seconds()
2356
* 1000, client.approved_by_default)
1368
client.approval_delay_milliseconds(),
1369
client.approved_by_default)
2358
1371
logger.warning("Client %s was not approved",
2383
1397
delay -= time2 - time
2386
session.send(client.secret)
2387
except gnutls.Error as error:
2388
logger.warning("gnutls send failed",
1400
while sent_size < len(client.secret):
1402
sent = session.send(client.secret[sent_size:])
1403
except gnutls.errors.GNUTLSError as error:
1404
logger.warning("gnutls send failed")
1406
logger.debug("Sent: %d, remaining: %d",
1407
sent, len(client.secret)
1408
- (sent_size + sent))
2392
1411
logger.info("Sending secret to %s", client.name)
2393
# bump the timeout using extended_timeout
2394
client.bump_timeout(client.extended_timeout)
1412
# bump the timeout as if seen
1413
client.checked_ok(client.extended_timeout)
2395
1414
if self.server.use_dbus:
2396
1415
# Emit D-Bus signal
2397
1416
client.GotSecret()
2400
1419
if approval_required:
2401
1420
client.approvals_pending -= 1
2404
except gnutls.Error as error:
2405
logger.warning("GnuTLS bye failed",
1423
except gnutls.errors.GNUTLSError as error:
1424
logger.warning("GnuTLS bye failed")
2409
1427
def peer_certificate(session):
2410
"Return the peer's certificate as a bytestring"
2412
cert_type = gnutls.certificate_type_get2(session._c_object,
2414
except AttributeError:
2415
cert_type = gnutls.certificate_type_get(session._c_object)
2416
if gnutls.has_rawpk:
2417
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2419
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2420
# If not a valid certificate type...
2421
if cert_type not in valid_cert_types:
2422
logger.info("Cert type %r not in %r", cert_type,
2424
# ...return invalid data
1428
"Return the peer's OpenPGP certificate as a bytestring"
1429
# If not an OpenPGP certificate...
1430
if (gnutls.library.functions
1431
.gnutls_certificate_type_get(session._c_object)
1432
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1433
# ...do the normal thing
1434
return session.peer_certificate
2426
1435
list_size = ctypes.c_uint(1)
2427
cert_list = (gnutls.certificate_get_peers
1436
cert_list = (gnutls.library.functions
1437
.gnutls_certificate_get_peers
2428
1438
(session._c_object, ctypes.byref(list_size)))
2429
1439
if not bool(cert_list) and list_size.value != 0:
2430
raise gnutls.Error("error getting peer certificate")
1440
raise gnutls.errors.GNUTLSError("error getting peer"
2431
1442
if list_size.value == 0:
2433
1444
cert = cert_list[0]
2434
1445
return ctypes.string_at(cert.data, cert.size)
2437
def key_id(certificate):
2438
"Convert a certificate bytestring to a hexdigit key ID"
2439
# New GnuTLS "datum" with the public key
2440
datum = gnutls.datum_t(
2441
ctypes.cast(ctypes.c_char_p(certificate),
2442
ctypes.POINTER(ctypes.c_ubyte)),
2443
ctypes.c_uint(len(certificate)))
2444
# XXX all these need to be created in the gnutls "module"
2445
# New empty GnuTLS certificate
2446
pubkey = gnutls.pubkey_t()
2447
gnutls.pubkey_init(ctypes.byref(pubkey))
2448
# Import the raw public key into the certificate
2449
gnutls.pubkey_import(pubkey,
2450
ctypes.byref(datum),
2451
gnutls.X509_FMT_DER)
2452
# New buffer for the key ID
2453
buf = ctypes.create_string_buffer(32)
2454
buf_len = ctypes.c_size_t(len(buf))
2455
# Get the key ID from the raw public key into the buffer
2456
gnutls.pubkey_get_key_id(pubkey,
2457
gnutls.KEYID_USE_SHA256,
2458
ctypes.cast(ctypes.byref(buf),
2459
ctypes.POINTER(ctypes.c_ubyte)),
2460
ctypes.byref(buf_len))
2461
# Deinit the certificate
2462
gnutls.pubkey_deinit(pubkey)
2464
# Convert the buffer to a Python bytestring
2465
key_id = ctypes.string_at(buf, buf_len.value)
2466
# Convert the bytestring to hexadecimal notation
2467
hex_key_id = binascii.hexlify(key_id).upper()
2471
1448
def fingerprint(openpgp):
2472
1449
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2473
1450
# New GnuTLS "datum" with the OpenPGP public key
2474
datum = gnutls.datum_t(
2475
ctypes.cast(ctypes.c_char_p(openpgp),
2476
ctypes.POINTER(ctypes.c_ubyte)),
2477
ctypes.c_uint(len(openpgp)))
1451
datum = (gnutls.library.types
1452
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1455
ctypes.c_uint(len(openpgp))))
2478
1456
# New empty GnuTLS certificate
2479
crt = gnutls.openpgp_crt_t()
2480
gnutls.openpgp_crt_init(ctypes.byref(crt))
1457
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1458
(gnutls.library.functions
1459
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2481
1460
# Import the OpenPGP public key into the certificate
2482
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2483
gnutls.OPENPGP_FMT_RAW)
1461
(gnutls.library.functions
1462
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1463
gnutls.library.constants
1464
.GNUTLS_OPENPGP_FMT_RAW))
2484
1465
# Verify the self signature in the key
2485
1466
crtverify = ctypes.c_uint()
2486
gnutls.openpgp_crt_verify_self(crt, 0,
2487
ctypes.byref(crtverify))
1467
(gnutls.library.functions
1468
.gnutls_openpgp_crt_verify_self(crt, 0,
1469
ctypes.byref(crtverify)))
2488
1470
if crtverify.value != 0:
2489
gnutls.openpgp_crt_deinit(crt)
2490
raise gnutls.CertificateSecurityError(code
1471
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1472
raise (gnutls.errors.CertificateSecurityError
2492
1474
# New buffer for the fingerprint
2493
1475
buf = ctypes.create_string_buffer(20)
2494
1476
buf_len = ctypes.c_size_t()
2495
1477
# Get the fingerprint from the certificate into the buffer
2496
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2497
ctypes.byref(buf_len))
1478
(gnutls.library.functions
1479
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1480
ctypes.byref(buf_len)))
2498
1481
# Deinit the certificate
2499
gnutls.openpgp_crt_deinit(crt)
1482
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2500
1483
# Convert the buffer to a Python bytestring
2501
1484
fpr = ctypes.string_at(buf, buf_len.value)
2502
1485
# Convert the bytestring to hexadecimal notation
2503
hex_fpr = binascii.hexlify(fpr).upper()
1486
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2507
class MultiprocessingMixIn:
1490
class MultiprocessingMixIn(object):
2508
1491
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2510
1492
def sub_process_main(self, request, address):
2512
1494
self.finish_request(request, address)
2514
1496
self.handle_error(request, address)
2515
1497
self.close_request(request)
2517
1499
def process_request(self, request, address):
2518
1500
"""Start a new process to process the request."""
2519
proc = multiprocessing.Process(target=self.sub_process_main,
2520
args=(request, address))
2525
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
1501
multiprocessing.Process(target = self.sub_process_main,
1502
args = (request, address)).start()
1505
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2526
1506
""" adds a pipe to the MixIn """
2528
1507
def process_request(self, request, client_address):
2529
1508
"""Overrides and wraps the original process_request().
2531
1510
This function creates a new pipe in self.pipe
2533
1512
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2535
proc = MultiprocessingMixIn.process_request(self, request,
1514
super(MultiprocessingMixInWithPipe,
1515
self).process_request(request, client_address)
2537
1516
self.child_pipe.close()
2538
self.add_pipe(parent_pipe, proc)
2540
def add_pipe(self, parent_pipe, proc):
1517
self.add_pipe(parent_pipe)
1519
def add_pipe(self, parent_pipe):
2541
1520
"""Dummy function; override as necessary"""
2542
raise NotImplementedError()
1521
raise NotImplementedError
2545
1524
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2546
socketserver.TCPServer):
1525
socketserver.TCPServer, object):
2547
1526
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2550
1529
enabled: Boolean; whether this server is activated yet
2551
1530
interface: None or a network interface name (string)
2552
1531
use_ipv6: Boolean; to use IPv6 or not
2555
1533
def __init__(self, server_address, RequestHandlerClass,
2559
"""If socketfd is set, use that file descriptor instead of
2560
creating a new one with socket.socket().
1534
interface=None, use_ipv6=True):
2562
1535
self.interface = interface
2564
1537
self.address_family = socket.AF_INET6
2565
if socketfd is not None:
2566
# Save the file descriptor
2567
self.socketfd = socketfd
2568
# Save the original socket.socket() function
2569
self.socket_socket = socket.socket
2571
# To implement --socket, we monkey patch socket.socket.
2573
# (When socketserver.TCPServer is a new-style class, we
2574
# could make self.socket into a property instead of monkey
2575
# patching socket.socket.)
2577
# Create a one-time-only replacement for socket.socket()
2578
@functools.wraps(socket.socket)
2579
def socket_wrapper(*args, **kwargs):
2580
# Restore original function so subsequent calls are
2582
socket.socket = self.socket_socket
2583
del self.socket_socket
2584
# This time only, return a new socket object from the
2585
# saved file descriptor.
2586
return socket.fromfd(self.socketfd, *args, **kwargs)
2587
# Replace socket.socket() function with wrapper
2588
socket.socket = socket_wrapper
2589
# The socketserver.TCPServer.__init__ will call
2590
# socket.socket(), which might be our replacement,
2591
# socket_wrapper(), if socketfd was set.
2592
1538
socketserver.TCPServer.__init__(self, server_address,
2593
1539
RequestHandlerClass)
2595
1540
def server_bind(self):
2596
1541
"""This overrides the normal server_bind() function
2597
1542
to bind to an interface if one was specified, and also NOT to
2598
1543
bind to an address or port if they were not specified."""
2599
global SO_BINDTODEVICE
2600
1544
if self.interface is not None:
2601
1545
if SO_BINDTODEVICE is None:
2602
# Fall back to a hard-coded value which seems to be
2604
logger.warning("SO_BINDTODEVICE not found, trying 25")
2605
SO_BINDTODEVICE = 25
2607
self.socket.setsockopt(
2608
socket.SOL_SOCKET, SO_BINDTODEVICE,
2609
(self.interface + "\0").encode("utf-8"))
2610
except socket.error as error:
2611
if error.errno == errno.EPERM:
2612
logger.error("No permission to bind to"
2613
" interface %s", self.interface)
2614
elif error.errno == errno.ENOPROTOOPT:
2615
logger.error("SO_BINDTODEVICE not available;"
2616
" cannot bind to interface %s",
2618
elif error.errno == errno.ENODEV:
2619
logger.error("Interface %s does not exist,"
2620
" cannot bind", self.interface)
1546
logger.error("SO_BINDTODEVICE does not exist;"
1547
" cannot bind to interface %s",
1551
self.socket.setsockopt(socket.SOL_SOCKET,
1555
except socket.error as error:
1556
if error[0] == errno.EPERM:
1557
logger.error("No permission to"
1558
" bind to interface %s",
1560
elif error[0] == errno.ENOPROTOOPT:
1561
logger.error("SO_BINDTODEVICE not available;"
1562
" cannot bind to interface %s",
2623
1566
# Only bind(2) the socket if we really need to.
2624
1567
if self.server_address[0] or self.server_address[1]:
2625
if self.server_address[1]:
2626
self.allow_reuse_address = True
2627
1568
if not self.server_address[0]:
2628
1569
if self.address_family == socket.AF_INET6:
2629
any_address = "::" # in6addr_any
1570
any_address = "::" # in6addr_any
2631
any_address = "0.0.0.0" # INADDR_ANY
1572
any_address = socket.INADDR_ANY
2632
1573
self.server_address = (any_address,
2633
1574
self.server_address[1])
2634
1575
elif not self.server_address[1]:
2635
self.server_address = (self.server_address[0], 0)
1576
self.server_address = (self.server_address[0],
2636
1578
# if self.interface:
2637
1579
# self.server_address = (self.server_address[0],
2645
1587
class MandosServer(IPv6_TCPServer):
2646
1588
"""Mandos server.
2649
1591
clients: set of Client objects
2650
1592
gnutls_priority GnuTLS priority string
2651
1593
use_dbus: Boolean; to emit D-Bus signals or not
2653
Assumes a GLib.MainLoop event loop.
1595
Assumes a gobject.MainLoop event loop.
2656
1597
def __init__(self, server_address, RequestHandlerClass,
2660
gnutls_priority=None,
1598
interface=None, use_ipv6=True, clients=None,
1599
gnutls_priority=None, use_dbus=True):
2663
1600
self.enabled = False
2664
1601
self.clients = clients
2665
1602
if self.clients is None:
1603
self.clients = set()
2667
1604
self.use_dbus = use_dbus
2668
1605
self.gnutls_priority = gnutls_priority
2669
1606
IPv6_TCPServer.__init__(self, server_address,
2670
1607
RequestHandlerClass,
2671
interface=interface,
1608
interface = interface,
1609
use_ipv6 = use_ipv6)
2675
1610
def server_activate(self):
2676
1611
if self.enabled:
2677
1612
return socketserver.TCPServer.server_activate(self)
2679
1613
def enable(self):
2680
1614
self.enabled = True
2682
def add_pipe(self, parent_pipe, proc):
1615
def add_pipe(self, parent_pipe):
2683
1616
# Call "handle_ipc" for both data and EOF events
2685
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2686
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2687
functools.partial(self.handle_ipc,
2688
parent_pipe=parent_pipe,
2691
def handle_ipc(self, source, condition,
1617
gobject.io_add_watch(parent_pipe.fileno(),
1618
gobject.IO_IN | gobject.IO_HUP,
1619
functools.partial(self.handle_ipc,
1620
parent_pipe = parent_pipe))
1622
def handle_ipc(self, source, condition, parent_pipe=None,
2694
1623
client_object=None):
2695
# error, or the other end of multiprocessing.Pipe has closed
2696
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2697
# Wait for other process to exit
1625
gobject.IO_IN: "IN", # There is data to read.
1626
gobject.IO_OUT: "OUT", # Data can be written (without
1628
gobject.IO_PRI: "PRI", # There is urgent data to read.
1629
gobject.IO_ERR: "ERR", # Error condition.
1630
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1631
# broken, usually for pipes and
1634
conditions_string = ' | '.join(name
1636
condition_names.iteritems()
1637
if cond & condition)
1638
# error or the other end of multiprocessing.Pipe has closed
1639
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2701
1642
# Read a request from the child
2702
1643
request = parent_pipe.recv()
2703
1644
command = request[0]
2705
1646
if command == 'init':
2706
key_id = request[1].decode("ascii")
2707
fpr = request[2].decode("ascii")
2708
address = request[3]
2710
for c in self.clients.values():
2711
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2713
if key_id and c.key_id == key_id:
2716
if fpr and c.fingerprint == fpr:
1648
address = request[2]
1650
for c in self.clients:
1651
if c.fingerprint == fpr:
2720
logger.info("Client not found for key ID: %s, address"
2721
": %s", key_id or fpr, address)
1655
logger.info("Client not found for fingerprint: %s, ad"
1656
"dress: %s", fpr, address)
2722
1657
if self.use_dbus:
2723
1658
# Emit D-Bus signal
2724
mandos_dbus_service.ClientNotFound(key_id or fpr,
1659
mandos_dbus_service.ClientNotFound(fpr, address[0])
2726
1660
parent_pipe.send(False)
2730
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2731
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2732
functools.partial(self.handle_ipc,
2733
parent_pipe=parent_pipe,
2735
client_object=client))
1663
gobject.io_add_watch(parent_pipe.fileno(),
1664
gobject.IO_IN | gobject.IO_HUP,
1665
functools.partial(self.handle_ipc,
1666
parent_pipe = parent_pipe,
1667
client_object = client))
2736
1668
parent_pipe.send(True)
2737
# remove the old hook in favor of the new above hook on
1669
# remove the old hook in favor of the new above hook on same fileno
2740
1671
if command == 'funcall':
2741
1672
funcname = request[1]
2742
1673
args = request[2]
2743
1674
kwargs = request[3]
2745
parent_pipe.send(('data', getattr(client_object,
1676
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
2749
1678
if command == 'getattr':
2750
1679
attrname = request[1]
2751
if isinstance(client_object.__getattribute__(attrname),
2752
collections.Callable):
2753
parent_pipe.send(('function', ))
1680
if callable(client_object.__getattribute__(attrname)):
1681
parent_pipe.send(('function',))
2756
'data', client_object.__getattribute__(attrname)))
1683
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2758
1685
if command == 'setattr':
2759
1686
attrname = request[1]
2760
1687
value = request[2]
2761
1688
setattr(client_object, attrname, value)
2766
def rfc3339_duration_to_delta(duration):
2767
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2769
>>> rfc3339_duration_to_delta("P7D") == datetime.timedelta(7)
2771
>>> rfc3339_duration_to_delta("PT60S") == datetime.timedelta(0, 60)
2773
>>> rfc3339_duration_to_delta("PT60M") == datetime.timedelta(0, 3600)
2775
>>> rfc3339_duration_to_delta("PT24H") == datetime.timedelta(1)
2777
>>> rfc3339_duration_to_delta("P1W") == datetime.timedelta(7)
2779
>>> rfc3339_duration_to_delta("PT5M30S") == datetime.timedelta(0, 330)
2781
>>> rfc3339_duration_to_delta("P1DT3M20S") == datetime.timedelta(1, 200)
2785
# Parsing an RFC 3339 duration with regular expressions is not
2786
# possible - there would have to be multiple places for the same
2787
# values, like seconds. The current code, while more esoteric, is
2788
# cleaner without depending on a parsing library. If Python had a
2789
# built-in library for parsing we would use it, but we'd like to
2790
# avoid excessive use of external libraries.
2792
# New type for defining tokens, syntax, and semantics all-in-one
2793
Token = collections.namedtuple("Token", (
2794
"regexp", # To match token; if "value" is not None, must have
2795
# a "group" containing digits
2796
"value", # datetime.timedelta or None
2797
"followers")) # Tokens valid after this token
2798
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2799
# the "duration" ABNF definition in RFC 3339, Appendix A.
2800
token_end = Token(re.compile(r"$"), None, frozenset())
2801
token_second = Token(re.compile(r"(\d+)S"),
2802
datetime.timedelta(seconds=1),
2803
frozenset((token_end, )))
2804
token_minute = Token(re.compile(r"(\d+)M"),
2805
datetime.timedelta(minutes=1),
2806
frozenset((token_second, token_end)))
2807
token_hour = Token(re.compile(r"(\d+)H"),
2808
datetime.timedelta(hours=1),
2809
frozenset((token_minute, token_end)))
2810
token_time = Token(re.compile(r"T"),
2812
frozenset((token_hour, token_minute,
2814
token_day = Token(re.compile(r"(\d+)D"),
2815
datetime.timedelta(days=1),
2816
frozenset((token_time, token_end)))
2817
token_month = Token(re.compile(r"(\d+)M"),
2818
datetime.timedelta(weeks=4),
2819
frozenset((token_day, token_end)))
2820
token_year = Token(re.compile(r"(\d+)Y"),
2821
datetime.timedelta(weeks=52),
2822
frozenset((token_month, token_end)))
2823
token_week = Token(re.compile(r"(\d+)W"),
2824
datetime.timedelta(weeks=1),
2825
frozenset((token_end, )))
2826
token_duration = Token(re.compile(r"P"), None,
2827
frozenset((token_year, token_month,
2828
token_day, token_time,
2830
# Define starting values:
2832
value = datetime.timedelta()
2834
# Following valid tokens
2835
followers = frozenset((token_duration, ))
2836
# String left to parse
2838
# Loop until end token is found
2839
while found_token is not token_end:
2840
# Search for any currently valid tokens
2841
for token in followers:
2842
match = token.regexp.match(s)
2843
if match is not None:
2845
if token.value is not None:
2846
# Value found, parse digits
2847
factor = int(match.group(1), 10)
2848
# Add to value so far
2849
value += factor * token.value
2850
# Strip token from string
2851
s = token.regexp.sub("", s, 1)
2854
# Set valid next tokens
2855
followers = found_token.followers
2858
# No currently valid tokens were found
2859
raise ValueError("Invalid RFC 3339 duration: {!r}"
2865
1693
def string_to_delta(interval):
2866
1694
"""Parse a string and return a datetime.timedelta
2868
>>> string_to_delta('7d') == datetime.timedelta(7)
2870
>>> string_to_delta('60s') == datetime.timedelta(0, 60)
2872
>>> string_to_delta('60m') == datetime.timedelta(0, 3600)
2874
>>> string_to_delta('24h') == datetime.timedelta(1)
2876
>>> string_to_delta('1w') == datetime.timedelta(7)
2878
>>> string_to_delta('5m 30s') == datetime.timedelta(0, 330)
1696
>>> string_to_delta('7d')
1697
datetime.timedelta(7)
1698
>>> string_to_delta('60s')
1699
datetime.timedelta(0, 60)
1700
>>> string_to_delta('60m')
1701
datetime.timedelta(0, 3600)
1702
>>> string_to_delta('24h')
1703
datetime.timedelta(1)
1704
>>> string_to_delta('1w')
1705
datetime.timedelta(7)
1706
>>> string_to_delta('5m 30s')
1707
datetime.timedelta(0, 330)
2883
return rfc3339_duration_to_delta(interval)
2887
1709
timevalue = datetime.timedelta(0)
2888
1710
for s in interval.split():
1712
suffix = unicode(s[-1])
2891
1713
value = int(s[:-1])
2892
1714
if suffix == "d":
2893
1715
delta = datetime.timedelta(value)
2965
1811
parser.add_argument("--no-dbus", action="store_false",
2966
1812
dest="use_dbus", help="Do not provide D-Bus"
2967
" system bus interface", default=None)
1813
" system bus interface")
2968
1814
parser.add_argument("--no-ipv6", action="store_false",
2969
dest="use_ipv6", help="Do not use IPv6",
2971
parser.add_argument("--no-restore", action="store_false",
2972
dest="restore", help="Do not restore stored"
2973
" state", default=None)
2974
parser.add_argument("--socket", type=int,
2975
help="Specify a file descriptor to a network"
2976
" socket to use instead of creating one")
2977
parser.add_argument("--statedir", metavar="DIR",
2978
help="Directory to save/restore state in")
2979
parser.add_argument("--foreground", action="store_true",
2980
help="Run in foreground", default=None)
2981
parser.add_argument("--no-zeroconf", action="store_false",
2982
dest="zeroconf", help="Do not use Zeroconf",
1815
dest="use_ipv6", help="Do not use IPv6")
2985
1816
options = parser.parse_args()
2987
1823
# Default values for config file for server-global settings
2988
if gnutls.has_rawpk:
2989
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2990
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2992
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2993
":+SIGN-DSA-SHA256")
2994
server_defaults = {"interface": "",
2998
"priority": priority,
2999
"servicename": "Mandos",
3005
"statedir": "/var/lib/mandos",
3006
"foreground": "False",
1824
server_defaults = { "interface": "",
1829
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1830
"servicename": "Mandos",
3011
1836
# Parse config file for server-global settings
3012
server_config = configparser.ConfigParser(server_defaults)
1837
server_config = configparser.SafeConfigParser(server_defaults)
3013
1838
del server_defaults
3014
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3015
# Convert the ConfigParser object to a dict
1839
server_config.read(os.path.join(options.configdir,
1841
# Convert the SafeConfigParser object to a dict
3016
1842
server_settings = server_config.defaults()
3017
1843
# Use the appropriate methods on the non-string config options
3018
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3019
"foreground", "zeroconf"):
1844
for option in ("debug", "use_dbus", "use_ipv6"):
3020
1845
server_settings[option] = server_config.getboolean("DEFAULT",
3022
1847
if server_settings["port"]:
3023
1848
server_settings["port"] = server_config.getint("DEFAULT",
3025
if server_settings["socket"]:
3026
server_settings["socket"] = server_config.getint("DEFAULT",
3028
# Later, stdin will, and stdout and stderr might, be dup'ed
3029
# over with an opened os.devnull. But we don't want this to
3030
# happen with a supplied network socket.
3031
if 0 <= server_settings["socket"] <= 2:
3032
server_settings["socket"] = os.dup(server_settings
3034
1850
del server_config
3036
1852
# Override the settings from the config file with command line
3037
1853
# options, if set.
3038
1854
for option in ("interface", "address", "port", "debug",
3039
"priority", "servicename", "configdir", "use_dbus",
3040
"use_ipv6", "debuglevel", "restore", "statedir",
3041
"socket", "foreground", "zeroconf"):
1855
"priority", "servicename", "configdir",
1856
"use_dbus", "use_ipv6", "debuglevel"):
3042
1857
value = getattr(options, option)
3043
1858
if value is not None:
3044
1859
server_settings[option] = value
3046
1861
# Force all strings to be unicode
3047
1862
for option in server_settings.keys():
3048
if isinstance(server_settings[option], bytes):
3049
server_settings[option] = (server_settings[option]
3051
# Force all boolean options to be boolean
3052
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3053
"foreground", "zeroconf"):
3054
server_settings[option] = bool(server_settings[option])
3055
# Debug implies foreground
3056
if server_settings["debug"]:
3057
server_settings["foreground"] = True
1863
if type(server_settings[option]) is str:
1864
server_settings[option] = unicode(server_settings[option])
3058
1865
# Now we have our good server settings in "server_settings"
3060
1867
##################################################################
3062
if (not server_settings["zeroconf"]
3063
and not (server_settings["port"]
3064
or server_settings["socket"] != "")):
3065
parser.error("Needs port or socket to work without Zeroconf")
3067
1869
# For convenience
3068
1870
debug = server_settings["debug"]
3069
1871
debuglevel = server_settings["debuglevel"]
3070
1872
use_dbus = server_settings["use_dbus"]
3071
1873
use_ipv6 = server_settings["use_ipv6"]
3072
stored_state_path = os.path.join(server_settings["statedir"],
3074
foreground = server_settings["foreground"]
3075
zeroconf = server_settings["zeroconf"]
3078
initlogger(debug, logging.DEBUG)
3083
level = getattr(logging, debuglevel.upper())
3084
initlogger(debug, level)
3086
1875
if server_settings["servicename"] != "Mandos":
3087
syslogger.setFormatter(
3088
logging.Formatter('Mandos ({}) [%(process)d]:'
3089
' %(levelname)s: %(message)s'.format(
3090
server_settings["servicename"])))
1876
syslogger.setFormatter(logging.Formatter
1877
('Mandos (%s) [%%(process)d]:'
1878
' %%(levelname)s: %%(message)s'
1879
% server_settings["servicename"]))
3092
1881
# Parse config file with clients
3093
client_config = configparser.ConfigParser(Client.client_defaults)
1882
client_defaults = { "timeout": "5m",
1883
"extended_timeout": "15m",
1885
"checker": "fping -q -- %%(host)s",
1887
"approval_delay": "0s",
1888
"approval_duration": "1s",
1890
client_config = configparser.SafeConfigParser(client_defaults)
3094
1891
client_config.read(os.path.join(server_settings["configdir"],
3095
1892
"clients.conf"))
3097
1894
global mandos_dbus_service
3098
1895
mandos_dbus_service = None
3101
if server_settings["socket"] != "":
3102
socketfd = server_settings["socket"]
3103
tcp_server = MandosServer(
3104
(server_settings["address"], server_settings["port"]),
3106
interface=(server_settings["interface"] or None),
3108
gnutls_priority=server_settings["priority"],
3112
pidfilename = "/run/mandos.pid"
3113
if not os.path.isdir("/run/."):
3114
pidfilename = "/var/run/mandos.pid"
3117
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3118
except IOError as e:
3119
logger.error("Could not open file %r", pidfilename,
3122
for name, group in (("_mandos", "_mandos"),
3123
("mandos", "mandos"),
3124
("nobody", "nogroup")):
3126
uid = pwd.getpwnam(name).pw_uid
3127
gid = pwd.getpwnam(group).pw_gid
1897
tcp_server = MandosServer((server_settings["address"],
1898
server_settings["port"]),
1900
interface=(server_settings["interface"]
1904
server_settings["priority"],
1907
pidfilename = "/var/run/mandos.pid"
1909
pidfile = open(pidfilename, "w")
1911
logger.error("Could not open file %r", pidfilename)
1914
uid = pwd.getpwnam("_mandos").pw_uid
1915
gid = pwd.getpwnam("_mandos").pw_gid
1918
uid = pwd.getpwnam("mandos").pw_uid
1919
gid = pwd.getpwnam("mandos").pw_gid
3129
1920
except KeyError:
1922
uid = pwd.getpwnam("nobody").pw_uid
1923
gid = pwd.getpwnam("nobody").pw_gid
3138
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3140
1930
except OSError as error:
3141
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3142
.format(uid, gid, os.strerror(error.errno)))
3143
if error.errno != errno.EPERM:
1931
if error[0] != errno.EPERM:
1934
if not debug and not debuglevel:
1935
syslogger.setLevel(logging.WARNING)
1936
console.setLevel(logging.WARNING)
1938
level = getattr(logging, debuglevel.upper())
1939
syslogger.setLevel(level)
1940
console.setLevel(level)
3147
1943
# Enable all possible GnuTLS debugging
3149
1945
# "Use a log level over 10 to enable all debugging options."
3150
1946
# - GnuTLS manual
3151
gnutls.global_set_log_level(11)
1947
gnutls.library.functions.gnutls_global_set_log_level(11)
1949
@gnutls.library.types.gnutls_log_func
3154
1950
def debug_gnutls(level, string):
3155
1951
logger.debug("GnuTLS: %s", string[:-1])
3157
gnutls.global_set_log_function(debug_gnutls)
1953
(gnutls.library.functions
1954
.gnutls_global_set_log_function(debug_gnutls))
3159
1956
# Redirect stdin so all checkers get /dev/null
3160
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1957
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3161
1958
os.dup2(null, sys.stdin.fileno())
1962
# No console logging
1963
logger.removeHandler(console)
3165
1965
# Need to fork before connecting to D-Bus
3167
1967
# Close all input and output, do double fork, etc.
3170
if gi.version_info < (3, 10, 2):
3171
# multiprocessing will use threads, so before we use GLib we
3172
# need to inform GLib that threads will be used.
3175
1970
global main_loop
3176
1971
# From the Avahi example code
3177
DBusGMainLoop(set_as_default=True)
3178
main_loop = GLib.MainLoop()
1972
DBusGMainLoop(set_as_default=True )
1973
main_loop = gobject.MainLoop()
3179
1974
bus = dbus.SystemBus()
3180
1975
# End of Avahi example code
3183
1978
bus_name = dbus.service.BusName("se.recompile.Mandos",
3186
old_bus_name = dbus.service.BusName(
3187
"se.bsnet.fukt.Mandos", bus,
3189
except dbus.exceptions.DBusException as e:
3190
logger.error("Disabling D-Bus:", exc_info=e)
1979
bus, do_not_queue=True)
1980
old_bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1981
bus, do_not_queue=True)
1982
except dbus.exceptions.NameExistsException as e:
1983
logger.error(unicode(e) + ", disabling D-Bus")
3191
1984
use_dbus = False
3192
1985
server_settings["use_dbus"] = False
3193
1986
tcp_server.use_dbus = False
3195
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3196
service = AvahiServiceToSyslog(
3197
name=server_settings["servicename"],
3198
servicetype="_mandos._tcp",
3201
if server_settings["interface"]:
3202
service.interface = if_nametoindex(
3203
server_settings["interface"].encode("utf-8"))
1987
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1988
service = AvahiService(name = server_settings["servicename"],
1989
servicetype = "_mandos._tcp",
1990
protocol = protocol, bus = bus)
1991
if server_settings["interface"]:
1992
service.interface = (if_nametoindex
1993
(str(server_settings["interface"])))
3205
1995
global multiprocessing_manager
3206
1996
multiprocessing_manager = multiprocessing.Manager()
3208
1998
client_class = Client
3210
client_class = functools.partial(ClientDBus, bus=bus)
3212
client_settings = Client.config_parser(client_config)
3213
old_client_settings = {}
3216
# This is used to redirect stdout and stderr for checker processes
3218
wnull = open(os.devnull, "w") # A writable /dev/null
3219
# Only used if server is running in foreground but not in debug
3221
if debug or not foreground:
3224
# Get client data and settings from last running state.
3225
if server_settings["restore"]:
3227
with open(stored_state_path, "rb") as stored_state:
3228
if sys.version_info.major == 2:
3229
clients_data, old_client_settings = pickle.load(
3232
bytes_clients_data, bytes_old_client_settings = (
3233
pickle.load(stored_state, encoding="bytes"))
3234
# Fix bytes to strings
3237
clients_data = {(key.decode("utf-8")
3238
if isinstance(key, bytes)
3241
bytes_clients_data.items()}
3242
del bytes_clients_data
3243
for key in clients_data:
3244
value = {(k.decode("utf-8")
3245
if isinstance(k, bytes) else k): v
3247
clients_data[key].items()}
3248
clients_data[key] = value
3250
value["client_structure"] = [
3252
if isinstance(s, bytes)
3254
value["client_structure"]]
3255
# .name, .host, and .checker_command
3256
for k in ("name", "host", "checker_command"):
3257
if isinstance(value[k], bytes):
3258
value[k] = value[k].decode("utf-8")
3259
if "key_id" not in value:
3260
value["key_id"] = ""
3261
elif "fingerprint" not in value:
3262
value["fingerprint"] = ""
3263
# old_client_settings
3265
old_client_settings = {
3266
(key.decode("utf-8")
3267
if isinstance(key, bytes)
3270
bytes_old_client_settings.items()}
3271
del bytes_old_client_settings
3272
# .host and .checker_command
3273
for value in old_client_settings.values():
3274
for attribute in ("host", "checker_command"):
3275
if isinstance(value[attribute], bytes):
3276
value[attribute] = (value[attribute]
3278
os.remove(stored_state_path)
3279
except IOError as e:
3280
if e.errno == errno.ENOENT:
3281
logger.warning("Could not load persistent state:"
3282
" {}".format(os.strerror(e.errno)))
3284
logger.critical("Could not load persistent state:",
3287
except EOFError as e:
3288
logger.warning("Could not load persistent state: "
3292
with PGPEngine() as pgp:
3293
for client_name, client in clients_data.items():
3294
# Skip removed clients
3295
if client_name not in client_settings:
3298
# Decide which value to use after restoring saved state.
3299
# We have three different values: Old config file,
3300
# new config file, and saved state.
3301
# New config value takes precedence if it differs from old
3302
# config value, otherwise use saved state.
3303
for name, value in client_settings[client_name].items():
3305
# For each value in new config, check if it
3306
# differs from the old config value (Except for
3307
# the "secret" attribute)
3308
if (name != "secret"
3310
old_client_settings[client_name][name])):
3311
client[name] = value
3315
# Clients who has passed its expire date can still be
3316
# enabled if its last checker was successful. A Client
3317
# whose checker succeeded before we stored its state is
3318
# assumed to have successfully run all checkers during
3320
if client["enabled"]:
3321
if datetime.datetime.utcnow() >= client["expires"]:
3322
if not client["last_checked_ok"]:
3324
"disabling client {} - Client never "
3325
"performed a successful checker".format(
3327
client["enabled"] = False
3328
elif client["last_checker_status"] != 0:
3330
"disabling client {} - Client last"
3331
" checker failed with error code"
3334
client["last_checker_status"]))
3335
client["enabled"] = False
3337
client["expires"] = (
3338
datetime.datetime.utcnow()
3339
+ client["timeout"])
3340
logger.debug("Last checker succeeded,"
3341
" keeping {} enabled".format(
2000
client_class = functools.partial(ClientDBusTransitional, bus = bus)
2001
def client_config_items(config, section):
2002
special_settings = {
2003
"approved_by_default":
2004
lambda: config.getboolean(section,
2005
"approved_by_default"),
2007
for name, value in config.items(section):
3344
client["secret"] = pgp.decrypt(
3345
client["encrypted_secret"],
3346
client_settings[client_name]["secret"])
3348
# If decryption fails, we use secret from new settings
3349
logger.debug("Failed to decrypt {} old secret".format(
3351
client["secret"] = (client_settings[client_name]
3354
# Add/remove clients based on new changes made to config
3355
for client_name in (set(old_client_settings)
3356
- set(client_settings)):
3357
del clients_data[client_name]
3358
for client_name in (set(client_settings)
3359
- set(old_client_settings)):
3360
clients_data[client_name] = client_settings[client_name]
3362
# Create all client objects
3363
for client_name, client in clients_data.items():
3364
tcp_server.clients[client_name] = client_class(
3367
server_settings=server_settings)
2009
yield (name, special_settings[name]())
2013
tcp_server.clients.update(set(
2014
client_class(name = section,
2015
config= dict(client_config_items(
2016
client_config, section)))
2017
for section in client_config.sections()))
3369
2018
if not tcp_server.clients:
3370
2019
logger.warning("No clients defined")
3373
if pidfile is not None:
3377
print(pid, file=pidfile)
3379
logger.error("Could not write to file %r with PID %d",
2025
pidfile.write(str(pid) + "\n".encode("utf-8"))
2028
logger.error("Could not write to file %r with PID %d",
2031
# "pidfile" was never created
3382
2033
del pidfilename
3384
for termsig in (signal.SIGHUP, signal.SIGTERM):
3385
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3386
lambda: main_loop.quit() and False)
2035
signal.signal(signal.SIGINT, signal.SIG_IGN)
2037
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2038
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3390
@alternate_dbus_interfaces(
3391
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3392
class MandosDBusService(DBusObjectWithObjectManager):
2041
class MandosDBusService(dbus.service.Object):
3393
2042
"""A D-Bus proxy object"""
3395
2043
def __init__(self):
3396
2044
dbus.service.Object.__init__(self, bus, "/")
3398
2045
_interface = "se.recompile.Mandos"
3400
2047
@dbus.service.signal(_interface, signature="o")
3401
2048
def ClientAdded(self, objpath):
3405
2052
@dbus.service.signal(_interface, signature="ss")
3406
def ClientNotFound(self, key_id, address):
2053
def ClientNotFound(self, fingerprint, address):
3410
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3412
2057
@dbus.service.signal(_interface, signature="os")
3413
2058
def ClientRemoved(self, objpath, name):
3417
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3419
2062
@dbus.service.method(_interface, out_signature="ao")
3420
2063
def GetAllClients(self):
3422
return dbus.Array(c.dbus_object_path for c in
3423
tcp_server.clients.values())
3425
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2065
return dbus.Array(c.dbus_object_path
2066
for c in tcp_server.clients)
3427
2068
@dbus.service.method(_interface,
3428
2069
out_signature="a{oa{sv}}")
3429
2070
def GetAllClientsWithProperties(self):
3431
2072
return dbus.Dictionary(
3432
{c.dbus_object_path: c.GetAll(
3433
"se.recompile.Mandos.Client")
3434
for c in tcp_server.clients.values()},
2073
((c.dbus_object_path, c.GetAll(""))
2074
for c in tcp_server.clients),
3435
2075
signature="oa{sv}")
3437
2077
@dbus.service.method(_interface, in_signature="o")
3438
2078
def RemoveClient(self, object_path):
3440
for c in tcp_server.clients.values():
2080
for c in tcp_server.clients:
3441
2081
if c.dbus_object_path == object_path:
3442
del tcp_server.clients[c.name]
2082
tcp_server.clients.remove(c)
3443
2083
c.remove_from_connection()
3444
# Don't signal the disabling
2084
# Don't signal anything except ClientRemoved
3445
2085
c.disable(quiet=True)
3446
# Emit D-Bus signal for removal
3447
self.client_removed_signal(c)
2087
self.ClientRemoved(object_path, c.name)
3449
2089
raise KeyError(object_path)
3453
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3454
out_signature="a{oa{sa{sv}}}")
3455
def GetManagedObjects(self):
3457
return dbus.Dictionary(
3458
{client.dbus_object_path:
3460
{interface: client.GetAll(interface)
3462
client._get_all_interface_names()})
3463
for client in tcp_server.clients.values()})
3465
def client_added_signal(self, client):
3466
"""Send the new standard signal and the old signal"""
3468
# New standard signal
3469
self.InterfacesAdded(
3470
client.dbus_object_path,
3472
{interface: client.GetAll(interface)
3474
client._get_all_interface_names()}))
3476
self.ClientAdded(client.dbus_object_path)
3478
def client_removed_signal(self, client):
3479
"""Send the new standard signal and the old signal"""
3481
# New standard signal
3482
self.InterfacesRemoved(
3483
client.dbus_object_path,
3484
client._get_all_interface_names())
3486
self.ClientRemoved(client.dbus_object_path,
3489
mandos_dbus_service = MandosDBusService()
3491
# Save modules to variables to exempt the modules from being
3492
# unloaded before the function registered with atexit() is run.
3493
mp = multiprocessing
2093
class MandosDBusServiceTransitional(MandosDBusService):
2094
__metaclass__ = AlternateDBusNamesMetaclass
2095
mandos_dbus_service = MandosDBusServiceTransitional()
3497
2098
"Cleanup function; run on exit"
3501
mp.active_children()
3503
if not (tcp_server.clients or client_settings):
3506
# Store client before exiting. Secrets are encrypted with key
3507
# based on what config file has. If config file is
3508
# removed/edited, old secret will thus be unrecovable.
3510
with PGPEngine() as pgp:
3511
for client in tcp_server.clients.values():
3512
key = client_settings[client.name]["secret"]
3513
client.encrypted_secret = pgp.encrypt(client.secret,
3517
# A list of attributes that can not be pickled
3519
exclude = {"bus", "changedstate", "secret",
3520
"checker", "server_settings"}
3521
for name, typ in inspect.getmembers(dbus.service
3525
client_dict["encrypted_secret"] = (client
3527
for attr in client.client_structure:
3528
if attr not in exclude:
3529
client_dict[attr] = getattr(client, attr)
3531
clients[client.name] = client_dict
3532
del client_settings[client.name]["secret"]
3535
with tempfile.NamedTemporaryFile(
3539
dir=os.path.dirname(stored_state_path),
3540
delete=False) as stored_state:
3541
pickle.dump((clients, client_settings), stored_state,
3543
tempname = stored_state.name
3544
os.rename(tempname, stored_state_path)
3545
except (IOError, OSError) as e:
3551
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3552
logger.warning("Could not save persistent state: {}"
3553
.format(os.strerror(e.errno)))
3555
logger.warning("Could not save persistent state:",
3559
# Delete all clients, and settings from config
3560
2101
while tcp_server.clients:
3561
name, client = tcp_server.clients.popitem()
2102
client = tcp_server.clients.pop()
3563
2104
client.remove_from_connection()
3564
# Don't signal the disabling
2105
client.disable_hook = None
2106
# Don't signal anything except ClientRemoved
3565
2107
client.disable(quiet=True)
3566
# Emit D-Bus signal for removal
3568
mandos_dbus_service.client_removed_signal(client)
3569
client_settings.clear()
2110
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
3571
2113
atexit.register(cleanup)
3573
for client in tcp_server.clients.values():
2115
for client in tcp_server.clients:
3575
# Emit D-Bus signal for adding
3576
mandos_dbus_service.client_added_signal(client)
3577
# Need to initiate checking of clients
3579
client.init_checker()
2118
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3581
2121
tcp_server.enable()
3582
2122
tcp_server.server_activate()
3584
2124
# Find out what port we got
3586
service.port = tcp_server.socket.getsockname()[1]
2125
service.port = tcp_server.socket.getsockname()[1]
3588
2127
logger.info("Now listening on address %r, port %d,"
3589
" flowinfo %d, scope_id %d",
3590
*tcp_server.socket.getsockname())
2128
" flowinfo %d, scope_id %d"
2129
% tcp_server.socket.getsockname())
3592
logger.info("Now listening on address %r, port %d",
3593
*tcp_server.socket.getsockname())
3595
# service.interface = tcp_server.socket.getsockname()[3]
2131
logger.info("Now listening on address %r, port %d"
2132
% tcp_server.socket.getsockname())
2134
#service.interface = tcp_server.socket.getsockname()[3]
3599
# From the Avahi example code
3602
except dbus.exceptions.DBusException as error:
3603
logger.critical("D-Bus Exception", exc_info=error)
3606
# End of Avahi example code
3609
GLib.IOChannel.unix_new(tcp_server.fileno()),
3610
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
3611
lambda *args, **kwargs: (tcp_server.handle_request
3612
(*args[2:], **kwargs) or True))
2137
# From the Avahi example code
2140
except dbus.exceptions.DBusException as error:
2141
logger.critical("DBusException: %s", error)
2144
# End of Avahi example code
2146
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2147
lambda *args, **kwargs:
2148
(tcp_server.handle_request
2149
(*args[2:], **kwargs) or True))
3614
2151
logger.debug("Starting main loop")
3615
2152
main_loop.run()
3616
2153
except AvahiError as error:
3617
logger.critical("Avahi Error", exc_info=error)
2154
logger.critical("AvahiError: %s", error)
3620
2157
except KeyboardInterrupt: