63
import cPickle as pickle
70
import cPickle as pickle
64
73
import multiprocessing
67
83
import dbus.service
85
from gi.repository import GLib
70
86
from dbus.mainloop.glib import DBusGMainLoop
73
89
import xml.dom.minidom
92
if sys.version_info.major == 2:
96
# Show warnings by default
97
if not sys.warnoptions:
99
warnings.simplefilter("default")
101
# Try to find the value of SO_BINDTODEVICE:
103
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
104
# newer, and it is also the most natural place for it:
77
105
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
78
106
except AttributeError:
108
# This is where SO_BINDTODEVICE was up to and including Python
80
110
from IN import SO_BINDTODEVICE
81
111
except ImportError:
82
SO_BINDTODEVICE = None
87
#logger = logging.getLogger('mandos')
88
logger = logging.Logger('mandos')
89
syslogger = (logging.handlers.SysLogHandler
90
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
91
address = str("/dev/log")))
92
syslogger.setFormatter(logging.Formatter
93
('Mandos [%(process)d]: %(levelname)s:'
95
logger.addHandler(syslogger)
97
console = logging.StreamHandler()
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
101
logger.addHandler(console)
112
# In Python 2.7 it seems to have been removed entirely.
113
# Try running the C preprocessor:
115
cc = subprocess.Popen(["cc", "--language=c", "-E",
117
stdin=subprocess.PIPE,
118
stdout=subprocess.PIPE)
119
stdout = cc.communicate(
120
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
121
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
122
except (OSError, ValueError, IndexError):
124
SO_BINDTODEVICE = None
126
if sys.version_info < (3, 2):
127
configparser.Configparser = configparser.SafeConfigParser
130
stored_state_file = "clients.pickle"
132
logger = logging.getLogger()
133
logging.captureWarnings(True) # Show warnings via the logging system
137
if_nametoindex = ctypes.cdll.LoadLibrary(
138
ctypes.util.find_library("c")).if_nametoindex
139
except (OSError, AttributeError):
141
def if_nametoindex(interface):
142
"Get an interface index the hard way, i.e. using fcntl()"
143
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
144
with contextlib.closing(socket.socket()) as s:
145
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
146
struct.pack(b"16s16x", interface))
147
interface_index = struct.unpack("I", ifreq[16:20])[0]
148
return interface_index
151
def copy_function(func):
152
"""Make a copy of a function"""
153
if sys.version_info.major == 2:
154
return types.FunctionType(func.func_code,
160
return types.FunctionType(func.__code__,
167
def initlogger(debug, level=logging.WARNING):
168
"""init logger and add loglevel"""
171
syslogger = (logging.handlers.SysLogHandler(
172
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
174
syslogger.setFormatter(logging.Formatter
175
('Mandos [%(process)d]: %(levelname)s:'
177
logger.addHandler(syslogger)
180
console = logging.StreamHandler()
181
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
185
logger.addHandler(console)
186
logger.setLevel(level)
189
class PGPError(Exception):
190
"""Exception if encryption/decryption fails"""
195
"""A simple class for OpenPGP symmetric encryption & decryption"""
198
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
201
output = subprocess.check_output(["gpgconf"])
202
for line in output.splitlines():
203
name, text, path = line.split(b":")
208
if e.errno != errno.ENOENT:
210
self.gnupgargs = ['--batch',
211
'--homedir', self.tempdir,
214
# Only GPG version 1 has the --no-use-agent option.
215
if self.gpg == b"gpg" or self.gpg.endswith(b"/gpg"):
216
self.gnupgargs.append("--no-use-agent")
221
def __exit__(self, exc_type, exc_value, traceback):
229
if self.tempdir is not None:
230
# Delete contents of tempdir
231
for root, dirs, files in os.walk(self.tempdir,
233
for filename in files:
234
os.remove(os.path.join(root, filename))
236
os.rmdir(os.path.join(root, dirname))
238
os.rmdir(self.tempdir)
241
def password_encode(self, password):
242
# Passphrase can not be empty and can not contain newlines or
243
# NUL bytes. So we prefix it and hex encode it.
244
encoded = b"mandos" + binascii.hexlify(password)
245
if len(encoded) > 2048:
246
# GnuPG can't handle long passwords, so encode differently
247
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
248
.replace(b"\n", b"\\n")
249
.replace(b"\0", b"\\x00"))
252
def encrypt(self, data, password):
253
passphrase = self.password_encode(password)
254
with tempfile.NamedTemporaryFile(
255
dir=self.tempdir) as passfile:
256
passfile.write(passphrase)
258
proc = subprocess.Popen([self.gpg, '--symmetric',
262
stdin=subprocess.PIPE,
263
stdout=subprocess.PIPE,
264
stderr=subprocess.PIPE)
265
ciphertext, err = proc.communicate(input=data)
266
if proc.returncode != 0:
270
def decrypt(self, data, password):
271
passphrase = self.password_encode(password)
272
with tempfile.NamedTemporaryFile(
273
dir=self.tempdir) as passfile:
274
passfile.write(passphrase)
276
proc = subprocess.Popen([self.gpg, '--decrypt',
280
stdin=subprocess.PIPE,
281
stdout=subprocess.PIPE,
282
stderr=subprocess.PIPE)
283
decrypted_plaintext, err = proc.communicate(input=data)
284
if proc.returncode != 0:
286
return decrypted_plaintext
289
# Pretend that we have an Avahi module
291
"""This isn't so much a class as it is a module-like namespace."""
292
IF_UNSPEC = -1 # avahi-common/address.h
293
PROTO_UNSPEC = -1 # avahi-common/address.h
294
PROTO_INET = 0 # avahi-common/address.h
295
PROTO_INET6 = 1 # avahi-common/address.h
296
DBUS_NAME = "org.freedesktop.Avahi"
297
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
298
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
299
DBUS_PATH_SERVER = "/"
302
def string_array_to_txt_array(t):
303
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
304
for s in t), signature="ay")
305
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
306
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
307
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
308
SERVER_INVALID = 0 # avahi-common/defs.h
309
SERVER_REGISTERING = 1 # avahi-common/defs.h
310
SERVER_RUNNING = 2 # avahi-common/defs.h
311
SERVER_COLLISION = 3 # avahi-common/defs.h
312
SERVER_FAILURE = 4 # avahi-common/defs.h
103
315
class AvahiError(Exception):
104
316
def __init__(self, value, *args, **kwargs):
105
317
self.value = value
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
318
return super(AvahiError, self).__init__(value, *args,
110
322
class AvahiServiceError(AvahiError):
113
326
class AvahiGroupError(AvahiError):
117
class AvahiService(object):
118
331
"""An Avahi (Zeroconf) service.
121
334
interface: integer; avahi.IF_UNSPEC or an interface index.
122
335
Used to optionally bind to the specified interface.
123
336
name: string; Example: 'Mandos'
124
337
type: string; Example: '_mandos._tcp'.
125
See <http://www.dns-sd.org/ServiceTypes.html>
338
See <https://www.iana.org/assignments/service-names-port-numbers>
126
339
port: integer; what port to announce
127
340
TXT: list of strings; TXT record for the service
128
341
domain: string; Domain to publish on, default to .local if empty.
260
500
follow_name_owner_changes=True),
261
501
avahi.DBUS_INTERFACE_SERVER)
262
502
self.server.connect_to_signal("StateChanged",
263
self.server_state_changed)
503
self.server_state_changed)
264
504
self.server_state_changed(self.server.GetState())
267
def _timedelta_to_milliseconds(td):
268
"Convert a datetime.timedelta() to milliseconds"
269
return ((td.days * 24 * 60 * 60 * 1000)
270
+ (td.seconds * 1000)
271
+ (td.microseconds // 1000))
273
class Client(object):
507
class AvahiServiceToSyslog(AvahiService):
508
def rename(self, *args, **kwargs):
509
"""Add the new name to the syslog messages"""
510
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
511
syslogger.setFormatter(logging.Formatter(
512
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
517
# Pretend that we have a GnuTLS module
519
"""This isn't so much a class as it is a module-like namespace."""
521
library = ctypes.util.find_library("gnutls")
523
library = ctypes.util.find_library("gnutls-deb0")
524
_library = ctypes.cdll.LoadLibrary(library)
527
# Unless otherwise indicated, the constants and types below are
528
# all from the gnutls/gnutls.h C header file.
539
E_NO_CERTIFICATE_FOUND = -49
544
KEYID_USE_SHA256 = 1 # gnutls/x509.h
545
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
548
class session_int(ctypes.Structure):
550
session_t = ctypes.POINTER(session_int)
552
class certificate_credentials_st(ctypes.Structure):
554
certificate_credentials_t = ctypes.POINTER(
555
certificate_credentials_st)
556
certificate_type_t = ctypes.c_int
558
class datum_t(ctypes.Structure):
559
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
560
('size', ctypes.c_uint)]
562
class openpgp_crt_int(ctypes.Structure):
564
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
565
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
566
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
567
credentials_type_t = ctypes.c_int
568
transport_ptr_t = ctypes.c_void_p
569
close_request_t = ctypes.c_int
572
class Error(Exception):
573
def __init__(self, message=None, code=None, args=()):
574
# Default usage is by a message string, but if a return
575
# code is passed, convert it to a string with
578
if message is None and code is not None:
579
message = gnutls.strerror(code)
580
return super(gnutls.Error, self).__init__(
583
class CertificateSecurityError(Error):
589
self._c_object = gnutls.certificate_credentials_t()
590
gnutls.certificate_allocate_credentials(
591
ctypes.byref(self._c_object))
592
self.type = gnutls.CRD_CERTIFICATE
595
gnutls.certificate_free_credentials(self._c_object)
598
def __init__(self, socket, credentials=None):
599
self._c_object = gnutls.session_t()
600
gnutls_flags = gnutls.CLIENT
601
if gnutls.check_version(b"3.5.6"):
602
gnutls_flags |= gnutls.NO_TICKETS
604
gnutls_flags |= gnutls.ENABLE_RAWPK
605
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
607
gnutls.set_default_priority(self._c_object)
608
gnutls.transport_set_ptr(self._c_object, socket.fileno())
609
gnutls.handshake_set_private_extensions(self._c_object,
612
if credentials is None:
613
credentials = gnutls.Credentials()
614
gnutls.credentials_set(self._c_object, credentials.type,
615
ctypes.cast(credentials._c_object,
617
self.credentials = credentials
620
gnutls.deinit(self._c_object)
623
return gnutls.handshake(self._c_object)
625
def send(self, data):
629
data_len -= gnutls.record_send(self._c_object,
634
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
636
# Error handling functions
637
def _error_code(result):
638
"""A function to raise exceptions on errors, suitable
639
for the 'restype' attribute on ctypes functions"""
642
if result == gnutls.E_NO_CERTIFICATE_FOUND:
643
raise gnutls.CertificateSecurityError(code=result)
644
raise gnutls.Error(code=result)
646
def _retry_on_error(result, func, arguments):
647
"""A function to retry on some errors, suitable
648
for the 'errcheck' attribute on ctypes functions"""
650
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
651
return _error_code(result)
652
result = func(*arguments)
655
# Unless otherwise indicated, the function declarations below are
656
# all from the gnutls/gnutls.h C header file.
659
priority_set_direct = _library.gnutls_priority_set_direct
660
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
661
ctypes.POINTER(ctypes.c_char_p)]
662
priority_set_direct.restype = _error_code
664
init = _library.gnutls_init
665
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
666
init.restype = _error_code
668
set_default_priority = _library.gnutls_set_default_priority
669
set_default_priority.argtypes = [session_t]
670
set_default_priority.restype = _error_code
672
record_send = _library.gnutls_record_send
673
record_send.argtypes = [session_t, ctypes.c_void_p,
675
record_send.restype = ctypes.c_ssize_t
676
record_send.errcheck = _retry_on_error
678
certificate_allocate_credentials = (
679
_library.gnutls_certificate_allocate_credentials)
680
certificate_allocate_credentials.argtypes = [
681
ctypes.POINTER(certificate_credentials_t)]
682
certificate_allocate_credentials.restype = _error_code
684
certificate_free_credentials = (
685
_library.gnutls_certificate_free_credentials)
686
certificate_free_credentials.argtypes = [
687
certificate_credentials_t]
688
certificate_free_credentials.restype = None
690
handshake_set_private_extensions = (
691
_library.gnutls_handshake_set_private_extensions)
692
handshake_set_private_extensions.argtypes = [session_t,
694
handshake_set_private_extensions.restype = None
696
credentials_set = _library.gnutls_credentials_set
697
credentials_set.argtypes = [session_t, credentials_type_t,
699
credentials_set.restype = _error_code
701
strerror = _library.gnutls_strerror
702
strerror.argtypes = [ctypes.c_int]
703
strerror.restype = ctypes.c_char_p
705
certificate_type_get = _library.gnutls_certificate_type_get
706
certificate_type_get.argtypes = [session_t]
707
certificate_type_get.restype = _error_code
709
certificate_get_peers = _library.gnutls_certificate_get_peers
710
certificate_get_peers.argtypes = [session_t,
711
ctypes.POINTER(ctypes.c_uint)]
712
certificate_get_peers.restype = ctypes.POINTER(datum_t)
714
global_set_log_level = _library.gnutls_global_set_log_level
715
global_set_log_level.argtypes = [ctypes.c_int]
716
global_set_log_level.restype = None
718
global_set_log_function = _library.gnutls_global_set_log_function
719
global_set_log_function.argtypes = [log_func]
720
global_set_log_function.restype = None
722
deinit = _library.gnutls_deinit
723
deinit.argtypes = [session_t]
724
deinit.restype = None
726
handshake = _library.gnutls_handshake
727
handshake.argtypes = [session_t]
728
handshake.restype = _error_code
729
handshake.errcheck = _retry_on_error
731
transport_set_ptr = _library.gnutls_transport_set_ptr
732
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
733
transport_set_ptr.restype = None
735
bye = _library.gnutls_bye
736
bye.argtypes = [session_t, close_request_t]
737
bye.restype = _error_code
738
bye.errcheck = _retry_on_error
740
check_version = _library.gnutls_check_version
741
check_version.argtypes = [ctypes.c_char_p]
742
check_version.restype = ctypes.c_char_p
744
_need_version = b"3.3.0"
745
if check_version(_need_version) is None:
746
raise self.Error("Needs GnuTLS {} or later"
747
.format(_need_version))
749
_tls_rawpk_version = b"3.6.6"
750
has_rawpk = bool(check_version(_tls_rawpk_version))
754
class pubkey_st(ctypes.Structure):
756
pubkey_t = ctypes.POINTER(pubkey_st)
758
x509_crt_fmt_t = ctypes.c_int
760
# All the function declarations below are from gnutls/abstract.h
761
pubkey_init = _library.gnutls_pubkey_init
762
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
763
pubkey_init.restype = _error_code
765
pubkey_import = _library.gnutls_pubkey_import
766
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
768
pubkey_import.restype = _error_code
770
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
771
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
772
ctypes.POINTER(ctypes.c_ubyte),
773
ctypes.POINTER(ctypes.c_size_t)]
774
pubkey_get_key_id.restype = _error_code
776
pubkey_deinit = _library.gnutls_pubkey_deinit
777
pubkey_deinit.argtypes = [pubkey_t]
778
pubkey_deinit.restype = None
780
# All the function declarations below are from gnutls/openpgp.h
782
openpgp_crt_init = _library.gnutls_openpgp_crt_init
783
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
784
openpgp_crt_init.restype = _error_code
786
openpgp_crt_import = _library.gnutls_openpgp_crt_import
787
openpgp_crt_import.argtypes = [openpgp_crt_t,
788
ctypes.POINTER(datum_t),
790
openpgp_crt_import.restype = _error_code
792
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
793
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
794
ctypes.POINTER(ctypes.c_uint)]
795
openpgp_crt_verify_self.restype = _error_code
797
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
798
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
799
openpgp_crt_deinit.restype = None
801
openpgp_crt_get_fingerprint = (
802
_library.gnutls_openpgp_crt_get_fingerprint)
803
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
807
openpgp_crt_get_fingerprint.restype = _error_code
809
if check_version(b"3.6.4"):
810
certificate_type_get2 = _library.gnutls_certificate_type_get2
811
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
812
certificate_type_get2.restype = _error_code
814
# Remove non-public functions
815
del _error_code, _retry_on_error
818
def call_pipe(connection, # : multiprocessing.Connection
819
func, *args, **kwargs):
820
"""This function is meant to be called by multiprocessing.Process
822
This function runs func(*args, **kwargs), and writes the resulting
823
return value on the provided multiprocessing.Connection.
825
connection.send(func(*args, **kwargs))
274
830
"""A representation of a client host served by this server.
277
_approved: bool(); 'None' if not yet approved/disapproved
833
approved: bool(); 'None' if not yet approved/disapproved
278
834
approval_delay: datetime.timedelta(); Time to wait for approval
279
835
approval_duration: datetime.timedelta(); Duration of one approval
280
checker: subprocess.Popen(); a running checker process used
281
to see if the client lives.
282
'None' if no process is running.
283
checker_callback_tag: a gobject event source tag, or None
836
checker: multiprocessing.Process(); a running checker process used
837
to see if the client lives. 'None' if no process is
839
checker_callback_tag: a GLib event source tag, or None
284
840
checker_command: string; External command which is run to check
285
841
if client lives. %() expansions are done at
286
842
runtime with vars(self) as dict, so that for
287
843
instance %(name)s can be used in the command.
288
checker_initiator_tag: a gobject event source tag, or None
844
checker_initiator_tag: a GLib event source tag, or None
289
845
created: datetime.datetime(); (UTC) object creation
846
client_structure: Object describing what attributes a client has
847
and is used for storing the client at exit
290
848
current_checker_command: string; current running checker_command
291
disable_hook: If set, called by disable() as disable_hook(self)
292
disable_initiator_tag: a gobject event source tag, or None
849
disable_initiator_tag: a GLib event source tag, or None
294
851
fingerprint: string (40 or 32 hexadecimal digits); used to
295
uniquely identify the client
852
uniquely identify an OpenPGP client
853
key_id: string (64 hexadecimal digits); used to uniquely identify
854
a client using raw public keys
296
855
host: string; available for use by the checker command
297
856
interval: datetime.timedelta(); How often to start a new checker
298
857
last_approval_request: datetime.datetime(); (UTC) or None
299
858
last_checked_ok: datetime.datetime(); (UTC) or None
300
last_enabled: datetime.datetime(); (UTC)
859
last_checker_status: integer between 0 and 255 reflecting exit
860
status of last checker. -1 reflects crashed
861
checker, -2 means no checker completed yet.
862
last_checker_signal: The signal which killed the last checker, if
863
last_checker_status is -1
864
last_enabled: datetime.datetime(); (UTC) or None
301
865
name: string; from the config file, used in log messages and
302
866
D-Bus identifiers
303
867
secret: bytestring; sent verbatim (over TLS) to client
304
868
timeout: datetime.timedelta(); How long from last_checked_ok
305
869
until this client is disabled
306
extended_timeout: extra long timeout when password has been sent
870
extended_timeout: extra long timeout when secret has been sent
307
871
runtime_expansions: Allowed attributes for runtime expansion.
308
872
expires: datetime.datetime(); time (UTC) when a client will be
309
873
disabled, or None
874
server_settings: The server_settings dict from main()
312
877
runtime_expansions = ("approval_delay", "approval_duration",
313
"created", "enabled", "fingerprint",
314
"host", "interval", "last_checked_ok",
878
"created", "enabled", "expires", "key_id",
879
"fingerprint", "host", "interval",
880
"last_approval_request", "last_checked_ok",
315
881
"last_enabled", "name", "timeout")
317
def timeout_milliseconds(self):
318
"Return the 'timeout' attribute in milliseconds"
319
return _timedelta_to_milliseconds(self.timeout)
321
def extended_timeout_milliseconds(self):
322
"Return the 'extended_timeout' attribute in milliseconds"
323
return _timedelta_to_milliseconds(self.extended_timeout)
325
def interval_milliseconds(self):
326
"Return the 'interval' attribute in milliseconds"
327
return _timedelta_to_milliseconds(self.interval)
329
def approval_delay_milliseconds(self):
330
return _timedelta_to_milliseconds(self.approval_delay)
332
def __init__(self, name = None, disable_hook=None, config=None):
333
"""Note: the 'checker' key in 'config' sets the
334
'checker_command' attribute and *not* the 'checker'
884
"extended_timeout": "PT15M",
886
"checker": "fping -q -- %%(host)s",
888
"approval_delay": "PT0S",
889
"approval_duration": "PT1S",
890
"approved_by_default": "True",
895
def config_parser(config):
896
"""Construct a new dict of client settings of this form:
897
{ client_name: {setting_name: value, ...}, ...}
898
with exceptions for any special settings as defined above.
899
NOTE: Must be a pure function. Must return the same result
900
value given the same arguments.
903
for client_name in config.sections():
904
section = dict(config.items(client_name))
905
client = settings[client_name] = {}
907
client["host"] = section["host"]
908
# Reformat values from string types to Python types
909
client["approved_by_default"] = config.getboolean(
910
client_name, "approved_by_default")
911
client["enabled"] = config.getboolean(client_name,
914
# Uppercase and remove spaces from key_id and fingerprint
915
# for later comparison purposes with return value from the
916
# key_id() and fingerprint() functions
917
client["key_id"] = (section.get("key_id", "").upper()
919
client["fingerprint"] = (section["fingerprint"].upper()
921
if "secret" in section:
922
client["secret"] = codecs.decode(section["secret"]
925
elif "secfile" in section:
926
with open(os.path.expanduser(os.path.expandvars
927
(section["secfile"])),
929
client["secret"] = secfile.read()
931
raise TypeError("No secret or secfile for section {}"
933
client["timeout"] = string_to_delta(section["timeout"])
934
client["extended_timeout"] = string_to_delta(
935
section["extended_timeout"])
936
client["interval"] = string_to_delta(section["interval"])
937
client["approval_delay"] = string_to_delta(
938
section["approval_delay"])
939
client["approval_duration"] = string_to_delta(
940
section["approval_duration"])
941
client["checker_command"] = section["checker"]
942
client["last_approval_request"] = None
943
client["last_checked_ok"] = None
944
client["last_checker_status"] = -2
948
def __init__(self, settings, name=None, server_settings=None):
950
if server_settings is None:
952
self.server_settings = server_settings
953
# adding all client settings
954
for setting, value in settings.items():
955
setattr(self, setting, value)
958
if not hasattr(self, "last_enabled"):
959
self.last_enabled = datetime.datetime.utcnow()
960
if not hasattr(self, "expires"):
961
self.expires = (datetime.datetime.utcnow()
964
self.last_enabled = None
339
967
logger.debug("Creating client %r", self.name)
340
# Uppercase and remove spaces from fingerprint for later
341
# comparison purposes with return value from the fingerprint()
343
self.fingerprint = (config["fingerprint"].upper()
968
logger.debug(" Key ID: %s", self.key_id)
345
969
logger.debug(" Fingerprint: %s", self.fingerprint)
346
if "secret" in config:
347
self.secret = config["secret"].decode("base64")
348
elif "secfile" in config:
349
with open(os.path.expanduser(os.path.expandvars
350
(config["secfile"])),
352
self.secret = secfile.read()
354
raise TypeError("No secret or secfile for client %s"
356
self.host = config.get("host", "")
357
self.created = datetime.datetime.utcnow()
359
self.last_approval_request = None
360
self.last_enabled = None
361
self.last_checked_ok = None
362
self.timeout = string_to_delta(config["timeout"])
363
self.extended_timeout = string_to_delta(config["extended_timeout"])
364
self.interval = string_to_delta(config["interval"])
365
self.disable_hook = disable_hook
970
self.created = settings.get("created",
971
datetime.datetime.utcnow())
973
# attributes specific for this server instance
366
974
self.checker = None
367
975
self.checker_initiator_tag = None
368
976
self.disable_initiator_tag = None
370
977
self.checker_callback_tag = None
371
self.checker_command = config["checker"]
372
978
self.current_checker_command = None
373
self.last_connect = None
374
self._approved = None
375
self.approved_by_default = config.get("approved_by_default",
377
980
self.approvals_pending = 0
378
self.approval_delay = string_to_delta(
379
config["approval_delay"])
380
self.approval_duration = string_to_delta(
381
config["approval_duration"])
382
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
981
self.changedstate = multiprocessing_manager.Condition(
982
multiprocessing_manager.Lock())
983
self.client_structure = [attr
984
for attr in self.__dict__.keys()
985
if not attr.startswith("_")]
986
self.client_structure.append("client_structure")
988
for name, t in inspect.getmembers(
989
type(self), lambda obj: isinstance(obj, property)):
990
if not name.startswith("_"):
991
self.client_structure.append(name)
993
# Send notice to process children that client state has changed
384
994
def send_changedstate(self):
385
self.changedstate.acquire()
386
self.changedstate.notify_all()
387
self.changedstate.release()
995
with self.changedstate:
996
self.changedstate.notify_all()
389
998
def enable(self):
390
999
"""Start this client's checker and timeout hooks"""
391
1000
if getattr(self, "enabled", False):
392
1001
# Already enabled
394
self.send_changedstate()
395
# Schedule a new checker to be started an 'interval' from now,
396
# and every interval from then on.
397
self.checker_initiator_tag = (gobject.timeout_add
398
(self.interval_milliseconds(),
400
# Schedule a disable() when 'timeout' has passed
401
1003
self.expires = datetime.datetime.utcnow() + self.timeout
402
self.disable_initiator_tag = (gobject.timeout_add
403
(self.timeout_milliseconds(),
405
1004
self.enabled = True
406
1005
self.last_enabled = datetime.datetime.utcnow()
407
# Also start a new checker *right now*.
1007
self.send_changedstate()
410
1009
def disable(self, quiet=True):
411
1010
"""Disable this client."""
412
1011
if not getattr(self, "enabled", False):
415
self.send_changedstate()
417
1014
logger.info("Disabling client %s", self.name)
418
if getattr(self, "disable_initiator_tag", False):
419
gobject.source_remove(self.disable_initiator_tag)
1015
if getattr(self, "disable_initiator_tag", None) is not None:
1016
GLib.source_remove(self.disable_initiator_tag)
420
1017
self.disable_initiator_tag = None
421
1018
self.expires = None
422
if getattr(self, "checker_initiator_tag", False):
423
gobject.source_remove(self.checker_initiator_tag)
1019
if getattr(self, "checker_initiator_tag", None) is not None:
1020
GLib.source_remove(self.checker_initiator_tag)
424
1021
self.checker_initiator_tag = None
425
1022
self.stop_checker()
426
if self.disable_hook:
427
self.disable_hook(self)
428
1023
self.enabled = False
429
# Do not run this again if called by a gobject.timeout_add
1025
self.send_changedstate()
1026
# Do not run this again if called by a GLib.timeout_add
432
1029
def __del__(self):
433
self.disable_hook = None
436
def checker_callback(self, pid, condition, command):
1032
def init_checker(self):
1033
# Schedule a new checker to be started an 'interval' from now,
1034
# and every interval from then on.
1035
if self.checker_initiator_tag is not None:
1036
GLib.source_remove(self.checker_initiator_tag)
1037
self.checker_initiator_tag = GLib.timeout_add(
1038
int(self.interval.total_seconds() * 1000),
1040
# Schedule a disable() when 'timeout' has passed
1041
if self.disable_initiator_tag is not None:
1042
GLib.source_remove(self.disable_initiator_tag)
1043
self.disable_initiator_tag = GLib.timeout_add(
1044
int(self.timeout.total_seconds() * 1000), self.disable)
1045
# Also start a new checker *right now*.
1046
self.start_checker()
1048
def checker_callback(self, source, condition, connection,
437
1050
"""The checker has completed, so take appropriate actions."""
1051
# Read return code from connection (see call_pipe)
1052
returncode = connection.recv()
1054
if self.checker is not None:
438
1056
self.checker_callback_tag = None
439
1057
self.checker = None
440
if os.WIFEXITED(condition):
441
exitstatus = os.WEXITSTATUS(condition)
1060
self.last_checker_status = returncode
1061
self.last_checker_signal = None
1062
if self.last_checker_status == 0:
443
1063
logger.info("Checker for %(name)s succeeded",
445
1065
self.checked_ok()
447
logger.info("Checker for %(name)s failed",
1067
logger.info("Checker for %(name)s failed", vars(self))
1069
self.last_checker_status = -1
1070
self.last_checker_signal = -returncode
450
1071
logger.warning("Checker for %(name)s crashed?",
453
def checked_ok(self, timeout=None):
454
"""Bump up the timeout for this client.
456
This should only be called when the client has been seen,
1075
def checked_ok(self):
1076
"""Assert that the client has been seen, alive and well."""
1077
self.last_checked_ok = datetime.datetime.utcnow()
1078
self.last_checker_status = 0
1079
self.last_checker_signal = None
1082
def bump_timeout(self, timeout=None):
1083
"""Bump up the timeout for this client."""
459
1084
if timeout is None:
460
1085
timeout = self.timeout
461
self.last_checked_ok = datetime.datetime.utcnow()
462
gobject.source_remove(self.disable_initiator_tag)
463
self.expires = datetime.datetime.utcnow() + timeout
464
self.disable_initiator_tag = (gobject.timeout_add
465
(_timedelta_to_milliseconds(timeout),
1086
if self.disable_initiator_tag is not None:
1087
GLib.source_remove(self.disable_initiator_tag)
1088
self.disable_initiator_tag = None
1089
if getattr(self, "enabled", False):
1090
self.disable_initiator_tag = GLib.timeout_add(
1091
int(timeout.total_seconds() * 1000), self.disable)
1092
self.expires = datetime.datetime.utcnow() + timeout
468
1094
def need_approval(self):
469
1095
self.last_approval_request = datetime.datetime.utcnow()
471
1097
def start_checker(self):
472
1098
"""Start a new checker subprocess if one is not running.
474
1100
If a checker already exists, leave it running and do
476
1102
# The reason for not killing a running checker is that if we
477
# did that, then if a checker (for some reason) started
478
# running slowly and taking more than 'interval' time, the
479
# client would inevitably timeout, since no checker would get
480
# a chance to run to completion. If we instead leave running
1103
# did that, and if a checker (for some reason) started running
1104
# slowly and taking more than 'interval' time, then the client
1105
# would inevitably timeout, since no checker would get a
1106
# chance to run to completion. If we instead leave running
481
1107
# checkers alone, the checker would have to take more time
482
1108
# than 'timeout' for the client to be disabled, which is as it
485
# If a checker exists, make sure it is not a zombie
487
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
488
except (AttributeError, OSError) as error:
489
if (isinstance(error, OSError)
490
and error.errno != errno.ECHILD):
494
logger.warning("Checker was a zombie")
495
gobject.source_remove(self.checker_callback_tag)
496
self.checker_callback(pid, status,
497
self.current_checker_command)
1111
if self.checker is not None and not self.checker.is_alive():
1112
logger.warning("Checker was not alive; joining")
498
1115
# Start a new checker if needed
499
1116
if self.checker is None:
1117
# Escape attributes for the shell
1119
attr: re.escape(str(getattr(self, attr)))
1120
for attr in self.runtime_expansions}
501
# In case checker_command has exactly one % operator
502
command = self.checker_command % self.host
504
# Escape attributes for the shell
505
escaped_attrs = dict(
507
re.escape(unicode(str(getattr(self, attr, "")),
511
self.runtime_expansions)
514
command = self.checker_command % escaped_attrs
515
except TypeError as error:
516
logger.error('Could not format string "%s":'
517
' %s', self.checker_command, error)
518
return True # Try again later
1122
command = self.checker_command % escaped_attrs
1123
except TypeError as error:
1124
logger.error('Could not format string "%s"',
1125
self.checker_command,
1127
return True # Try again later
519
1128
self.current_checker_command = command
521
logger.info("Starting checker %r for %s",
523
# We don't need to redirect stdout and stderr, since
524
# in normal mode, that is already done by daemon(),
525
# and in debug mode we don't want to. (Stdin is
526
# always replaced by /dev/null.)
527
self.checker = subprocess.Popen(command,
530
self.checker_callback_tag = (gobject.child_watch_add
532
self.checker_callback,
534
# The checker may have completed before the gobject
535
# watch was added. Check for this.
536
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
538
gobject.source_remove(self.checker_callback_tag)
539
self.checker_callback(pid, status, command)
540
except OSError as error:
541
logger.error("Failed to start subprocess: %s",
543
# Re-run this periodically if run by gobject.timeout_add
1129
logger.info("Starting checker %r for %s", command,
1131
# We don't need to redirect stdout and stderr, since
1132
# in normal mode, that is already done by daemon(),
1133
# and in debug mode we don't want to. (Stdin is
1134
# always replaced by /dev/null.)
1135
# The exception is when not debugging but nevertheless
1136
# running in the foreground; use the previously
1138
popen_args = {"close_fds": True,
1141
if (not self.server_settings["debug"]
1142
and self.server_settings["foreground"]):
1143
popen_args.update({"stdout": wnull,
1145
pipe = multiprocessing.Pipe(duplex=False)
1146
self.checker = multiprocessing.Process(
1148
args=(pipe[1], subprocess.call, command),
1150
self.checker.start()
1151
self.checker_callback_tag = GLib.io_add_watch(
1152
GLib.IOChannel.unix_new(pipe[0].fileno()),
1153
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
1154
self.checker_callback, pipe[0], command)
1155
# Re-run this periodically if run by GLib.timeout_add
546
1158
def stop_checker(self):
547
1159
"""Force the checker process, if any, to stop."""
548
1160
if self.checker_callback_tag:
549
gobject.source_remove(self.checker_callback_tag)
1161
GLib.source_remove(self.checker_callback_tag)
550
1162
self.checker_callback_tag = None
551
1163
if getattr(self, "checker", None) is None:
553
1165
logger.debug("Stopping checker for %(name)s", vars(self))
555
os.kill(self.checker.pid, signal.SIGTERM)
557
#if self.checker.poll() is None:
558
# os.kill(self.checker.pid, signal.SIGKILL)
559
except OSError as error:
560
if error.errno != errno.ESRCH: # No such process
1166
self.checker.terminate()
562
1167
self.checker = None
564
def dbus_service_property(dbus_interface, signature="v",
565
access="readwrite", byte_arrays=False):
1170
def dbus_service_property(dbus_interface,
566
1174
"""Decorators for marking methods of a DBusObjectWithProperties to
567
1175
become properties on the D-Bus.
569
1177
The decorated method will be called with no arguments by "Get"
570
1178
and with one argument by "Set".
572
1180
The parameters, where they are supported, are the same as
573
1181
dbus.service.method, except there is only "signature", since the
574
1182
type from Get() and the type sent to Set() is the same.
746
1514
except (AttributeError, xml.dom.DOMException,
747
1515
xml.parsers.expat.ExpatError) as error:
748
1516
logger.error("Failed to override Introspection method",
753
def datetime_to_dbus (dt, variant_level=0):
1522
dbus.OBJECT_MANAGER_IFACE
1523
except AttributeError:
1524
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1527
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1528
"""A D-Bus object with an ObjectManager.
1530
Classes inheriting from this exposes the standard
1531
GetManagedObjects call and the InterfacesAdded and
1532
InterfacesRemoved signals on the standard
1533
"org.freedesktop.DBus.ObjectManager" interface.
1535
Note: No signals are sent automatically; they must be sent
1538
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1539
out_signature="a{oa{sa{sv}}}")
1540
def GetManagedObjects(self):
1541
"""This function must be overridden"""
1542
raise NotImplementedError()
1544
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1545
signature="oa{sa{sv}}")
1546
def InterfacesAdded(self, object_path, interfaces_and_properties):
1549
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1550
def InterfacesRemoved(self, object_path, interfaces):
1553
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1555
path_keyword='object_path',
1556
connection_keyword='connection')
1557
def Introspect(self, object_path, connection):
1558
"""Overloading of standard D-Bus method.
1560
Override return argument name of GetManagedObjects to be
1561
"objpath_interfaces_and_properties"
1563
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1567
document = xml.dom.minidom.parseString(xmlstring)
1569
for if_tag in document.getElementsByTagName("interface"):
1570
# Fix argument name for the GetManagedObjects method
1571
if (if_tag.getAttribute("name")
1572
== dbus.OBJECT_MANAGER_IFACE):
1573
for cn in if_tag.getElementsByTagName("method"):
1574
if (cn.getAttribute("name")
1575
== "GetManagedObjects"):
1576
for arg in cn.getElementsByTagName("arg"):
1577
if (arg.getAttribute("direction")
1581
"objpath_interfaces"
1583
xmlstring = document.toxml("utf-8")
1585
except (AttributeError, xml.dom.DOMException,
1586
xml.parsers.expat.ExpatError) as error:
1587
logger.error("Failed to override Introspection method",
1592
def datetime_to_dbus(dt, variant_level=0):
754
1593
"""Convert a UTC datetime.datetime() to a D-Bus type."""
756
return dbus.String("", variant_level = variant_level)
757
return dbus.String(dt.isoformat(),
758
variant_level=variant_level)
1595
return dbus.String("", variant_level=variant_level)
1596
return dbus.String(dt.isoformat(), variant_level=variant_level)
1599
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1600
"""A class decorator; applied to a subclass of
1601
dbus.service.Object, it will add alternate D-Bus attributes with
1602
interface names according to the "alt_interface_names" mapping.
1605
@alternate_dbus_interfaces({"org.example.Interface":
1606
"net.example.AlternateInterface"})
1607
class SampleDBusObject(dbus.service.Object):
1608
@dbus.service.method("org.example.Interface")
1609
def SampleDBusMethod():
1612
The above "SampleDBusMethod" on "SampleDBusObject" will be
1613
reachable via two interfaces: "org.example.Interface" and
1614
"net.example.AlternateInterface", the latter of which will have
1615
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1616
"true", unless "deprecate" is passed with a False value.
1618
This works for methods and signals, and also for D-Bus properties
1619
(from DBusObjectWithProperties) and interfaces (from the
1620
dbus_interface_annotations decorator).
1624
for orig_interface_name, alt_interface_name in (
1625
alt_interface_names.items()):
1627
interface_names = set()
1628
# Go though all attributes of the class
1629
for attrname, attribute in inspect.getmembers(cls):
1630
# Ignore non-D-Bus attributes, and D-Bus attributes
1631
# with the wrong interface name
1632
if (not hasattr(attribute, "_dbus_interface")
1633
or not attribute._dbus_interface.startswith(
1634
orig_interface_name)):
1636
# Create an alternate D-Bus interface name based on
1638
alt_interface = attribute._dbus_interface.replace(
1639
orig_interface_name, alt_interface_name)
1640
interface_names.add(alt_interface)
1641
# Is this a D-Bus signal?
1642
if getattr(attribute, "_dbus_is_signal", False):
1643
# Extract the original non-method undecorated
1644
# function by black magic
1645
if sys.version_info.major == 2:
1646
nonmethod_func = (dict(
1647
zip(attribute.func_code.co_freevars,
1648
attribute.__closure__))
1649
["func"].cell_contents)
1651
nonmethod_func = (dict(
1652
zip(attribute.__code__.co_freevars,
1653
attribute.__closure__))
1654
["func"].cell_contents)
1655
# Create a new, but exactly alike, function
1656
# object, and decorate it to be a new D-Bus signal
1657
# with the alternate D-Bus interface name
1658
new_function = copy_function(nonmethod_func)
1659
new_function = (dbus.service.signal(
1661
attribute._dbus_signature)(new_function))
1662
# Copy annotations, if any
1664
new_function._dbus_annotations = dict(
1665
attribute._dbus_annotations)
1666
except AttributeError:
1669
# Define a creator of a function to call both the
1670
# original and alternate functions, so both the
1671
# original and alternate signals gets sent when
1672
# the function is called
1673
def fixscope(func1, func2):
1674
"""This function is a scope container to pass
1675
func1 and func2 to the "call_both" function
1676
outside of its arguments"""
1678
@functools.wraps(func2)
1679
def call_both(*args, **kwargs):
1680
"""This function will emit two D-Bus
1681
signals by calling func1 and func2"""
1682
func1(*args, **kwargs)
1683
func2(*args, **kwargs)
1684
# Make wrapper function look like a D-Bus
1686
for name, attr in inspect.getmembers(func2):
1687
if name.startswith("_dbus_"):
1688
setattr(call_both, name, attr)
1691
# Create the "call_both" function and add it to
1693
attr[attrname] = fixscope(attribute, new_function)
1694
# Is this a D-Bus method?
1695
elif getattr(attribute, "_dbus_is_method", False):
1696
# Create a new, but exactly alike, function
1697
# object. Decorate it to be a new D-Bus method
1698
# with the alternate D-Bus interface name. Add it
1701
dbus.service.method(
1703
attribute._dbus_in_signature,
1704
attribute._dbus_out_signature)
1705
(copy_function(attribute)))
1706
# Copy annotations, if any
1708
attr[attrname]._dbus_annotations = dict(
1709
attribute._dbus_annotations)
1710
except AttributeError:
1712
# Is this a D-Bus property?
1713
elif getattr(attribute, "_dbus_is_property", False):
1714
# Create a new, but exactly alike, function
1715
# object, and decorate it to be a new D-Bus
1716
# property with the alternate D-Bus interface
1717
# name. Add it to the class.
1718
attr[attrname] = (dbus_service_property(
1719
alt_interface, attribute._dbus_signature,
1720
attribute._dbus_access,
1721
attribute._dbus_get_args_options
1723
(copy_function(attribute)))
1724
# Copy annotations, if any
1726
attr[attrname]._dbus_annotations = dict(
1727
attribute._dbus_annotations)
1728
except AttributeError:
1730
# Is this a D-Bus interface?
1731
elif getattr(attribute, "_dbus_is_interface", False):
1732
# Create a new, but exactly alike, function
1733
# object. Decorate it to be a new D-Bus interface
1734
# with the alternate D-Bus interface name. Add it
1737
dbus_interface_annotations(alt_interface)
1738
(copy_function(attribute)))
1740
# Deprecate all alternate interfaces
1741
iname = "_AlternateDBusNames_interface_annotation{}"
1742
for interface_name in interface_names:
1744
@dbus_interface_annotations(interface_name)
1746
return {"org.freedesktop.DBus.Deprecated":
1748
# Find an unused name
1749
for aname in (iname.format(i)
1750
for i in itertools.count()):
1751
if aname not in attr:
1755
# Replace the class with a new subclass of it with
1756
# methods, signals, etc. as created above.
1757
if sys.version_info.major == 2:
1758
cls = type(b"{}Alternate".format(cls.__name__),
1761
cls = type("{}Alternate".format(cls.__name__),
1768
@alternate_dbus_interfaces({"se.recompile.Mandos":
1769
"se.bsnet.fukt.Mandos"})
760
1770
class ClientDBus(Client, DBusObjectWithProperties):
761
1771
"""A Client class using D-Bus
764
1774
dbus_object_path: dbus.ObjectPath
765
1775
bus: dbus.SystemBus()
768
1778
runtime_expansions = (Client.runtime_expansions
769
+ ("dbus_object_path",))
1779
+ ("dbus_object_path", ))
1781
_interface = "se.recompile.Mandos.Client"
771
1783
# dbus.service.Object doesn't use super(), so we can't either.
773
def __init__(self, bus = None, *args, **kwargs):
774
self._approvals_pending = 0
1785
def __init__(self, bus=None, *args, **kwargs):
776
1787
Client.__init__(self, *args, **kwargs)
777
1788
# Only now, when this client is initialized, can it show up on
779
client_object_name = unicode(self.name).translate(
1790
client_object_name = str(self.name).translate(
780
1791
{ord("."): ord("_"),
781
1792
ord("-"): ord("_")})
782
self.dbus_object_path = (dbus.ObjectPath
783
("/clients/" + client_object_name))
1793
self.dbus_object_path = dbus.ObjectPath(
1794
"/clients/" + client_object_name)
784
1795
DBusObjectWithProperties.__init__(self, self.bus,
785
1796
self.dbus_object_path)
787
def notifychangeproperty(transform_func,
788
dbus_name, type_func=lambda x: x,
790
""" Modify a variable so that its a property that announce its
792
transform_fun: Function that takes a value and transform it to
794
dbus_name: DBus name of the variable
1798
def notifychangeproperty(transform_func, dbus_name,
1799
type_func=lambda x: x,
1801
invalidate_only=False,
1802
_interface=_interface):
1803
""" Modify a variable so that it's a property which announces
1804
its changes to DBus.
1806
transform_fun: Function that takes a value and a variant_level
1807
and transforms it to a D-Bus type.
1808
dbus_name: D-Bus name of the variable
795
1809
type_func: Function that transform the value before sending it
797
variant_level: DBus variant level. default: 1
1810
to the D-Bus. Default: no transform
1811
variant_level: D-Bus variant level. Default: 1
1813
attrname = "_{}".format(dbus_name)
800
1815
def setter(self, value):
801
old_value = real_value[0]
802
real_value[0] = value
803
1816
if hasattr(self, "dbus_object_path"):
804
if type_func(old_value) != type_func(real_value[0]):
805
dbus_value = transform_func(type_func(real_value[0]),
807
self.PropertyChanged(dbus.String(dbus_name),
810
return property(lambda self: real_value[0], setter)
1817
if (not hasattr(self, attrname) or
1818
type_func(getattr(self, attrname, None))
1819
!= type_func(value)):
1821
self.PropertiesChanged(
1822
_interface, dbus.Dictionary(),
1823
dbus.Array((dbus_name, )))
1825
dbus_value = transform_func(
1827
variant_level=variant_level)
1828
self.PropertyChanged(dbus.String(dbus_name),
1830
self.PropertiesChanged(
1832
dbus.Dictionary({dbus.String(dbus_name):
1835
setattr(self, attrname, value)
1837
return property(lambda self: getattr(self, attrname), setter)
813
1839
expires = notifychangeproperty(datetime_to_dbus, "Expires")
814
1840
approvals_pending = notifychangeproperty(dbus.Boolean,
815
1841
"ApprovalPending",
817
1843
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
818
1844
last_enabled = notifychangeproperty(datetime_to_dbus,
820
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
821
type_func = lambda checker: checker is not None)
1846
checker = notifychangeproperty(
1847
dbus.Boolean, "CheckerRunning",
1848
type_func=lambda checker: checker is not None)
822
1849
last_checked_ok = notifychangeproperty(datetime_to_dbus,
823
1850
"LastCheckedOK")
824
last_approval_request = notifychangeproperty(datetime_to_dbus,
825
"LastApprovalRequest")
1851
last_checker_status = notifychangeproperty(dbus.Int16,
1852
"LastCheckerStatus")
1853
last_approval_request = notifychangeproperty(
1854
datetime_to_dbus, "LastApprovalRequest")
826
1855
approved_by_default = notifychangeproperty(dbus.Boolean,
827
1856
"ApprovedByDefault")
828
approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",
829
type_func = _timedelta_to_milliseconds)
830
approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",
831
type_func = _timedelta_to_milliseconds)
1857
approval_delay = notifychangeproperty(
1858
dbus.UInt64, "ApprovalDelay",
1859
type_func=lambda td: td.total_seconds() * 1000)
1860
approval_duration = notifychangeproperty(
1861
dbus.UInt64, "ApprovalDuration",
1862
type_func=lambda td: td.total_seconds() * 1000)
832
1863
host = notifychangeproperty(dbus.String, "Host")
833
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
834
type_func = _timedelta_to_milliseconds)
835
extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",
836
type_func = _timedelta_to_milliseconds)
837
interval = notifychangeproperty(dbus.UInt16, "Interval",
838
type_func = _timedelta_to_milliseconds)
1864
timeout = notifychangeproperty(
1865
dbus.UInt64, "Timeout",
1866
type_func=lambda td: td.total_seconds() * 1000)
1867
extended_timeout = notifychangeproperty(
1868
dbus.UInt64, "ExtendedTimeout",
1869
type_func=lambda td: td.total_seconds() * 1000)
1870
interval = notifychangeproperty(
1871
dbus.UInt64, "Interval",
1872
type_func=lambda td: td.total_seconds() * 1000)
839
1873
checker_command = notifychangeproperty(dbus.String, "Checker")
1874
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1875
invalidate_only=True)
841
1877
del notifychangeproperty
843
1879
def __del__(self, *args, **kwargs):
845
1881
self.remove_from_connection()
1301
2380
delay -= time2 - time
1304
while sent_size < len(client.secret):
1306
sent = session.send(client.secret[sent_size:])
1307
except gnutls.errors.GNUTLSError as error:
1308
logger.warning("gnutls send failed")
1310
logger.debug("Sent: %d, remaining: %d",
1311
sent, len(client.secret)
1312
- (sent_size + sent))
2383
session.send(client.secret)
2384
except gnutls.Error as error:
2385
logger.warning("gnutls send failed",
1315
2389
logger.info("Sending secret to %s", client.name)
1316
# bump the timeout as if seen
1317
client.checked_ok(client.extended_timeout)
2390
# bump the timeout using extended_timeout
2391
client.bump_timeout(client.extended_timeout)
1318
2392
if self.server.use_dbus:
1319
2393
# Emit D-Bus signal
1320
2394
client.GotSecret()
1323
2397
if approval_required:
1324
2398
client.approvals_pending -= 1
1327
except gnutls.errors.GNUTLSError as error:
1328
logger.warning("GnuTLS bye failed")
2401
except gnutls.Error as error:
2402
logger.warning("GnuTLS bye failed",
1331
2406
def peer_certificate(session):
1332
"Return the peer's OpenPGP certificate as a bytestring"
1333
# If not an OpenPGP certificate...
1334
if (gnutls.library.functions
1335
.gnutls_certificate_type_get(session._c_object)
1336
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1337
# ...do the normal thing
1338
return session.peer_certificate
2407
"Return the peer's certificate as a bytestring"
2409
cert_type = gnutls.certificate_type_get2(session._c_object,
2411
except AttributeError:
2412
cert_type = gnutls.certificate_type_get(session._c_object)
2413
if gnutls.has_rawpk:
2414
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2416
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2417
# If not a valid certificate type...
2418
if cert_type not in valid_cert_types:
2419
logger.info("Cert type %r not in %r", cert_type,
2421
# ...return invalid data
1339
2423
list_size = ctypes.c_uint(1)
1340
cert_list = (gnutls.library.functions
1341
.gnutls_certificate_get_peers
2424
cert_list = (gnutls.certificate_get_peers
1342
2425
(session._c_object, ctypes.byref(list_size)))
1343
2426
if not bool(cert_list) and list_size.value != 0:
1344
raise gnutls.errors.GNUTLSError("error getting peer"
2427
raise gnutls.Error("error getting peer certificate")
1346
2428
if list_size.value == 0:
1348
2430
cert = cert_list[0]
1349
2431
return ctypes.string_at(cert.data, cert.size)
2434
def key_id(certificate):
2435
"Convert a certificate bytestring to a hexdigit key ID"
2436
# New GnuTLS "datum" with the public key
2437
datum = gnutls.datum_t(
2438
ctypes.cast(ctypes.c_char_p(certificate),
2439
ctypes.POINTER(ctypes.c_ubyte)),
2440
ctypes.c_uint(len(certificate)))
2441
# XXX all these need to be created in the gnutls "module"
2442
# New empty GnuTLS certificate
2443
pubkey = gnutls.pubkey_t()
2444
gnutls.pubkey_init(ctypes.byref(pubkey))
2445
# Import the raw public key into the certificate
2446
gnutls.pubkey_import(pubkey,
2447
ctypes.byref(datum),
2448
gnutls.X509_FMT_DER)
2449
# New buffer for the key ID
2450
buf = ctypes.create_string_buffer(32)
2451
buf_len = ctypes.c_size_t(len(buf))
2452
# Get the key ID from the raw public key into the buffer
2453
gnutls.pubkey_get_key_id(pubkey,
2454
gnutls.KEYID_USE_SHA256,
2455
ctypes.cast(ctypes.byref(buf),
2456
ctypes.POINTER(ctypes.c_ubyte)),
2457
ctypes.byref(buf_len))
2458
# Deinit the certificate
2459
gnutls.pubkey_deinit(pubkey)
2461
# Convert the buffer to a Python bytestring
2462
key_id = ctypes.string_at(buf, buf_len.value)
2463
# Convert the bytestring to hexadecimal notation
2464
hex_key_id = binascii.hexlify(key_id).upper()
1352
2468
def fingerprint(openpgp):
1353
2469
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1354
2470
# New GnuTLS "datum" with the OpenPGP public key
1355
datum = (gnutls.library.types
1356
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1359
ctypes.c_uint(len(openpgp))))
2471
datum = gnutls.datum_t(
2472
ctypes.cast(ctypes.c_char_p(openpgp),
2473
ctypes.POINTER(ctypes.c_ubyte)),
2474
ctypes.c_uint(len(openpgp)))
1360
2475
# New empty GnuTLS certificate
1361
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1362
(gnutls.library.functions
1363
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2476
crt = gnutls.openpgp_crt_t()
2477
gnutls.openpgp_crt_init(ctypes.byref(crt))
1364
2478
# Import the OpenPGP public key into the certificate
1365
(gnutls.library.functions
1366
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1367
gnutls.library.constants
1368
.GNUTLS_OPENPGP_FMT_RAW))
2479
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2480
gnutls.OPENPGP_FMT_RAW)
1369
2481
# Verify the self signature in the key
1370
2482
crtverify = ctypes.c_uint()
1371
(gnutls.library.functions
1372
.gnutls_openpgp_crt_verify_self(crt, 0,
1373
ctypes.byref(crtverify)))
2483
gnutls.openpgp_crt_verify_self(crt, 0,
2484
ctypes.byref(crtverify))
1374
2485
if crtverify.value != 0:
1375
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1376
raise (gnutls.errors.CertificateSecurityError
2486
gnutls.openpgp_crt_deinit(crt)
2487
raise gnutls.CertificateSecurityError(code
1378
2489
# New buffer for the fingerprint
1379
2490
buf = ctypes.create_string_buffer(20)
1380
2491
buf_len = ctypes.c_size_t()
1381
2492
# Get the fingerprint from the certificate into the buffer
1382
(gnutls.library.functions
1383
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1384
ctypes.byref(buf_len)))
2493
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2494
ctypes.byref(buf_len))
1385
2495
# Deinit the certificate
1386
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2496
gnutls.openpgp_crt_deinit(crt)
1387
2497
# Convert the buffer to a Python bytestring
1388
2498
fpr = ctypes.string_at(buf, buf_len.value)
1389
2499
# Convert the bytestring to hexadecimal notation
1390
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2500
hex_fpr = binascii.hexlify(fpr).upper()
1394
class MultiprocessingMixIn(object):
2504
class MultiprocessingMixIn:
1395
2505
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1396
2507
def sub_process_main(self, request, address):
1398
2509
self.finish_request(request, address)
1400
2511
self.handle_error(request, address)
1401
2512
self.close_request(request)
1403
2514
def process_request(self, request, address):
1404
2515
"""Start a new process to process the request."""
1405
multiprocessing.Process(target = self.sub_process_main,
1406
args = (request, address)).start()
1408
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2516
proc = multiprocessing.Process(target=self.sub_process_main,
2517
args=(request, address))
2522
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
1409
2523
""" adds a pipe to the MixIn """
1410
2525
def process_request(self, request, client_address):
1411
2526
"""Overrides and wraps the original process_request().
1413
2528
This function creates a new pipe in self.pipe
1415
2530
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1417
super(MultiprocessingMixInWithPipe,
1418
self).process_request(request, client_address)
2532
proc = MultiprocessingMixIn.process_request(self, request,
1419
2534
self.child_pipe.close()
1420
self.add_pipe(parent_pipe)
2535
self.add_pipe(parent_pipe, proc)
1422
def add_pipe(self, parent_pipe):
2537
def add_pipe(self, parent_pipe, proc):
1423
2538
"""Dummy function; override as necessary"""
1424
raise NotImplementedError
2539
raise NotImplementedError()
1426
2542
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1427
socketserver.TCPServer, object):
2543
socketserver.TCPServer):
1428
2544
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1431
2547
enabled: Boolean; whether this server is activated yet
1432
2548
interface: None or a network interface name (string)
1433
2549
use_ipv6: Boolean; to use IPv6 or not
1435
2552
def __init__(self, server_address, RequestHandlerClass,
1436
interface=None, use_ipv6=True):
2556
"""If socketfd is set, use that file descriptor instead of
2557
creating a new one with socket.socket().
1437
2559
self.interface = interface
1439
2561
self.address_family = socket.AF_INET6
2562
if socketfd is not None:
2563
# Save the file descriptor
2564
self.socketfd = socketfd
2565
# Save the original socket.socket() function
2566
self.socket_socket = socket.socket
2568
# To implement --socket, we monkey patch socket.socket.
2570
# (When socketserver.TCPServer is a new-style class, we
2571
# could make self.socket into a property instead of monkey
2572
# patching socket.socket.)
2574
# Create a one-time-only replacement for socket.socket()
2575
@functools.wraps(socket.socket)
2576
def socket_wrapper(*args, **kwargs):
2577
# Restore original function so subsequent calls are
2579
socket.socket = self.socket_socket
2580
del self.socket_socket
2581
# This time only, return a new socket object from the
2582
# saved file descriptor.
2583
return socket.fromfd(self.socketfd, *args, **kwargs)
2584
# Replace socket.socket() function with wrapper
2585
socket.socket = socket_wrapper
2586
# The socketserver.TCPServer.__init__ will call
2587
# socket.socket(), which might be our replacement,
2588
# socket_wrapper(), if socketfd was set.
1440
2589
socketserver.TCPServer.__init__(self, server_address,
1441
2590
RequestHandlerClass)
1442
2592
def server_bind(self):
1443
2593
"""This overrides the normal server_bind() function
1444
2594
to bind to an interface if one was specified, and also NOT to
1445
2595
bind to an address or port if they were not specified."""
2596
global SO_BINDTODEVICE
1446
2597
if self.interface is not None:
1447
2598
if SO_BINDTODEVICE is None:
1448
logger.error("SO_BINDTODEVICE does not exist;"
1449
" cannot bind to interface %s",
1453
self.socket.setsockopt(socket.SOL_SOCKET,
1457
except socket.error as error:
1458
if error[0] == errno.EPERM:
1459
logger.error("No permission to"
1460
" bind to interface %s",
1462
elif error[0] == errno.ENOPROTOOPT:
1463
logger.error("SO_BINDTODEVICE not available;"
1464
" cannot bind to interface %s",
2599
# Fall back to a hard-coded value which seems to be
2601
logger.warning("SO_BINDTODEVICE not found, trying 25")
2602
SO_BINDTODEVICE = 25
2604
self.socket.setsockopt(
2605
socket.SOL_SOCKET, SO_BINDTODEVICE,
2606
(self.interface + "\0").encode("utf-8"))
2607
except socket.error as error:
2608
if error.errno == errno.EPERM:
2609
logger.error("No permission to bind to"
2610
" interface %s", self.interface)
2611
elif error.errno == errno.ENOPROTOOPT:
2612
logger.error("SO_BINDTODEVICE not available;"
2613
" cannot bind to interface %s",
2615
elif error.errno == errno.ENODEV:
2616
logger.error("Interface %s does not exist,"
2617
" cannot bind", self.interface)
1468
2620
# Only bind(2) the socket if we really need to.
1469
2621
if self.server_address[0] or self.server_address[1]:
2622
if self.server_address[1]:
2623
self.allow_reuse_address = True
1470
2624
if not self.server_address[0]:
1471
2625
if self.address_family == socket.AF_INET6:
1472
any_address = "::" # in6addr_any
2626
any_address = "::" # in6addr_any
1474
any_address = socket.INADDR_ANY
2628
any_address = "0.0.0.0" # INADDR_ANY
1475
2629
self.server_address = (any_address,
1476
2630
self.server_address[1])
1477
2631
elif not self.server_address[1]:
1478
self.server_address = (self.server_address[0],
2632
self.server_address = (self.server_address[0], 0)
1480
2633
# if self.interface:
1481
2634
# self.server_address = (self.server_address[0],
1713
2962
parser.add_argument("--no-dbus", action="store_false",
1714
2963
dest="use_dbus", help="Do not provide D-Bus"
1715
" system bus interface")
2964
" system bus interface", default=None)
1716
2965
parser.add_argument("--no-ipv6", action="store_false",
1717
dest="use_ipv6", help="Do not use IPv6")
2966
dest="use_ipv6", help="Do not use IPv6",
2968
parser.add_argument("--no-restore", action="store_false",
2969
dest="restore", help="Do not restore stored"
2970
" state", default=None)
2971
parser.add_argument("--socket", type=int,
2972
help="Specify a file descriptor to a network"
2973
" socket to use instead of creating one")
2974
parser.add_argument("--statedir", metavar="DIR",
2975
help="Directory to save/restore state in")
2976
parser.add_argument("--foreground", action="store_true",
2977
help="Run in foreground", default=None)
2978
parser.add_argument("--no-zeroconf", action="store_false",
2979
dest="zeroconf", help="Do not use Zeroconf",
1718
2982
options = parser.parse_args()
1725
2984
# Default values for config file for server-global settings
1726
server_defaults = { "interface": "",
1731
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1732
"servicename": "Mandos",
2985
if gnutls.has_rawpk:
2986
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2987
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2989
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2990
":+SIGN-DSA-SHA256")
2991
server_defaults = {"interface": "",
2995
"priority": priority,
2996
"servicename": "Mandos",
3002
"statedir": "/var/lib/mandos",
3003
"foreground": "False",
1738
3008
# Parse config file for server-global settings
1739
server_config = configparser.SafeConfigParser(server_defaults)
3009
server_config = configparser.ConfigParser(server_defaults)
1740
3010
del server_defaults
1741
server_config.read(os.path.join(options.configdir,
1743
# Convert the SafeConfigParser object to a dict
3011
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3012
# Convert the ConfigParser object to a dict
1744
3013
server_settings = server_config.defaults()
1745
3014
# Use the appropriate methods on the non-string config options
1746
for option in ("debug", "use_dbus", "use_ipv6"):
3015
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3016
"foreground", "zeroconf"):
1747
3017
server_settings[option] = server_config.getboolean("DEFAULT",
1749
3019
if server_settings["port"]:
1750
3020
server_settings["port"] = server_config.getint("DEFAULT",
3022
if server_settings["socket"]:
3023
server_settings["socket"] = server_config.getint("DEFAULT",
3025
# Later, stdin will, and stdout and stderr might, be dup'ed
3026
# over with an opened os.devnull. But we don't want this to
3027
# happen with a supplied network socket.
3028
if 0 <= server_settings["socket"] <= 2:
3029
server_settings["socket"] = os.dup(server_settings
1752
3031
del server_config
1754
3033
# Override the settings from the config file with command line
1755
3034
# options, if set.
1756
3035
for option in ("interface", "address", "port", "debug",
1757
"priority", "servicename", "configdir",
1758
"use_dbus", "use_ipv6", "debuglevel"):
3036
"priority", "servicename", "configdir", "use_dbus",
3037
"use_ipv6", "debuglevel", "restore", "statedir",
3038
"socket", "foreground", "zeroconf"):
1759
3039
value = getattr(options, option)
1760
3040
if value is not None:
1761
3041
server_settings[option] = value
1763
3043
# Force all strings to be unicode
1764
3044
for option in server_settings.keys():
1765
if type(server_settings[option]) is str:
1766
server_settings[option] = unicode(server_settings[option])
3045
if isinstance(server_settings[option], bytes):
3046
server_settings[option] = (server_settings[option]
3048
# Force all boolean options to be boolean
3049
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3050
"foreground", "zeroconf"):
3051
server_settings[option] = bool(server_settings[option])
3052
# Debug implies foreground
3053
if server_settings["debug"]:
3054
server_settings["foreground"] = True
1767
3055
# Now we have our good server settings in "server_settings"
1769
3057
##################################################################
3059
if (not server_settings["zeroconf"]
3060
and not (server_settings["port"]
3061
or server_settings["socket"] != "")):
3062
parser.error("Needs port or socket to work without Zeroconf")
1771
3064
# For convenience
1772
3065
debug = server_settings["debug"]
1773
3066
debuglevel = server_settings["debuglevel"]
1774
3067
use_dbus = server_settings["use_dbus"]
1775
3068
use_ipv6 = server_settings["use_ipv6"]
3069
stored_state_path = os.path.join(server_settings["statedir"],
3071
foreground = server_settings["foreground"]
3072
zeroconf = server_settings["zeroconf"]
3075
initlogger(debug, logging.DEBUG)
3080
level = getattr(logging, debuglevel.upper())
3081
initlogger(debug, level)
1777
3083
if server_settings["servicename"] != "Mandos":
1778
syslogger.setFormatter(logging.Formatter
1779
('Mandos (%s) [%%(process)d]:'
1780
' %%(levelname)s: %%(message)s'
1781
% server_settings["servicename"]))
3084
syslogger.setFormatter(
3085
logging.Formatter('Mandos ({}) [%(process)d]:'
3086
' %(levelname)s: %(message)s'.format(
3087
server_settings["servicename"])))
1783
3089
# Parse config file with clients
1784
client_defaults = { "timeout": "5m",
1785
"extended_timeout": "15m",
1787
"checker": "fping -q -- %%(host)s",
1789
"approval_delay": "0s",
1790
"approval_duration": "1s",
1792
client_config = configparser.SafeConfigParser(client_defaults)
3090
client_config = configparser.ConfigParser(Client.client_defaults)
1793
3091
client_config.read(os.path.join(server_settings["configdir"],
1794
3092
"clients.conf"))
1796
3094
global mandos_dbus_service
1797
3095
mandos_dbus_service = None
1799
tcp_server = MandosServer((server_settings["address"],
1800
server_settings["port"]),
1802
interface=(server_settings["interface"]
1806
server_settings["priority"],
1809
pidfilename = "/var/run/mandos.pid"
1811
pidfile = open(pidfilename, "w")
1813
logger.error("Could not open file %r", pidfilename)
1816
uid = pwd.getpwnam("_mandos").pw_uid
1817
gid = pwd.getpwnam("_mandos").pw_gid
1820
uid = pwd.getpwnam("mandos").pw_uid
1821
gid = pwd.getpwnam("mandos").pw_gid
3098
if server_settings["socket"] != "":
3099
socketfd = server_settings["socket"]
3100
tcp_server = MandosServer(
3101
(server_settings["address"], server_settings["port"]),
3103
interface=(server_settings["interface"] or None),
3105
gnutls_priority=server_settings["priority"],
3109
pidfilename = "/run/mandos.pid"
3110
if not os.path.isdir("/run/."):
3111
pidfilename = "/var/run/mandos.pid"
3114
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3115
except IOError as e:
3116
logger.error("Could not open file %r", pidfilename,
3119
for name, group in (("_mandos", "_mandos"),
3120
("mandos", "mandos"),
3121
("nobody", "nogroup")):
3123
uid = pwd.getpwnam(name).pw_uid
3124
gid = pwd.getpwnam(group).pw_gid
1822
3126
except KeyError:
1824
uid = pwd.getpwnam("nobody").pw_uid
1825
gid = pwd.getpwnam("nobody").pw_gid
3135
logger.debug("Did setuid/setgid to {}:{}".format(uid,
1832
3137
except OSError as error:
1833
if error[0] != errno.EPERM:
1836
if not debug and not debuglevel:
1837
syslogger.setLevel(logging.WARNING)
1838
console.setLevel(logging.WARNING)
1840
level = getattr(logging, debuglevel.upper())
1841
syslogger.setLevel(level)
1842
console.setLevel(level)
3138
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3139
.format(uid, gid, os.strerror(error.errno)))
3140
if error.errno != errno.EPERM:
1845
3144
# Enable all possible GnuTLS debugging
1847
3146
# "Use a log level over 10 to enable all debugging options."
1848
3147
# - GnuTLS manual
1849
gnutls.library.functions.gnutls_global_set_log_level(11)
1851
@gnutls.library.types.gnutls_log_func
3148
gnutls.global_set_log_level(11)
1852
3151
def debug_gnutls(level, string):
1853
3152
logger.debug("GnuTLS: %s", string[:-1])
1855
(gnutls.library.functions
1856
.gnutls_global_set_log_function(debug_gnutls))
3154
gnutls.global_set_log_function(debug_gnutls)
1858
3156
# Redirect stdin so all checkers get /dev/null
1859
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3157
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1860
3158
os.dup2(null, sys.stdin.fileno())
1864
# No console logging
1865
logger.removeHandler(console)
1867
3162
# Need to fork before connecting to D-Bus
1869
3164
# Close all input and output, do double fork, etc.
3167
if gi.version_info < (3, 10, 2):
3168
# multiprocessing will use threads, so before we use GLib we
3169
# need to inform GLib that threads will be used.
1872
3172
global main_loop
1873
3173
# From the Avahi example code
1874
DBusGMainLoop(set_as_default=True )
1875
main_loop = gobject.MainLoop()
3174
DBusGMainLoop(set_as_default=True)
3175
main_loop = GLib.MainLoop()
1876
3176
bus = dbus.SystemBus()
1877
3177
# End of Avahi example code
1880
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1881
bus, do_not_queue=True)
1882
except dbus.exceptions.NameExistsException as e:
1883
logger.error(unicode(e) + ", disabling D-Bus")
3180
bus_name = dbus.service.BusName("se.recompile.Mandos",
3183
old_bus_name = dbus.service.BusName(
3184
"se.bsnet.fukt.Mandos", bus,
3186
except dbus.exceptions.DBusException as e:
3187
logger.error("Disabling D-Bus:", exc_info=e)
1884
3188
use_dbus = False
1885
3189
server_settings["use_dbus"] = False
1886
3190
tcp_server.use_dbus = False
1887
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1888
service = AvahiService(name = server_settings["servicename"],
1889
servicetype = "_mandos._tcp",
1890
protocol = protocol, bus = bus)
1891
if server_settings["interface"]:
1892
service.interface = (if_nametoindex
1893
(str(server_settings["interface"])))
3192
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3193
service = AvahiServiceToSyslog(
3194
name=server_settings["servicename"],
3195
servicetype="_mandos._tcp",
3198
if server_settings["interface"]:
3199
service.interface = if_nametoindex(
3200
server_settings["interface"].encode("utf-8"))
1895
3202
global multiprocessing_manager
1896
3203
multiprocessing_manager = multiprocessing.Manager()
1898
3205
client_class = Client
1900
client_class = functools.partial(ClientDBus, bus = bus)
1901
def client_config_items(config, section):
1902
special_settings = {
1903
"approved_by_default":
1904
lambda: config.getboolean(section,
1905
"approved_by_default"),
1907
for name, value in config.items(section):
3207
client_class = functools.partial(ClientDBus, bus=bus)
3209
client_settings = Client.config_parser(client_config)
3210
old_client_settings = {}
3213
# This is used to redirect stdout and stderr for checker processes
3215
wnull = open(os.devnull, "w") # A writable /dev/null
3216
# Only used if server is running in foreground but not in debug
3218
if debug or not foreground:
3221
# Get client data and settings from last running state.
3222
if server_settings["restore"]:
3224
with open(stored_state_path, "rb") as stored_state:
3225
if sys.version_info.major == 2:
3226
clients_data, old_client_settings = pickle.load(
3229
bytes_clients_data, bytes_old_client_settings = (
3230
pickle.load(stored_state, encoding="bytes"))
3231
# Fix bytes to strings
3234
clients_data = {(key.decode("utf-8")
3235
if isinstance(key, bytes)
3238
bytes_clients_data.items()}
3239
del bytes_clients_data
3240
for key in clients_data:
3241
value = {(k.decode("utf-8")
3242
if isinstance(k, bytes) else k): v
3244
clients_data[key].items()}
3245
clients_data[key] = value
3247
value["client_structure"] = [
3249
if isinstance(s, bytes)
3251
value["client_structure"]]
3252
# .name, .host, and .checker_command
3253
for k in ("name", "host", "checker_command"):
3254
if isinstance(value[k], bytes):
3255
value[k] = value[k].decode("utf-8")
3256
if "key_id" not in value:
3257
value["key_id"] = ""
3258
elif "fingerprint" not in value:
3259
value["fingerprint"] = ""
3260
# old_client_settings
3262
old_client_settings = {
3263
(key.decode("utf-8")
3264
if isinstance(key, bytes)
3267
bytes_old_client_settings.items()}
3268
del bytes_old_client_settings
3269
# .host and .checker_command
3270
for value in old_client_settings.values():
3271
for attribute in ("host", "checker_command"):
3272
if isinstance(value[attribute], bytes):
3273
value[attribute] = (value[attribute]
3275
os.remove(stored_state_path)
3276
except IOError as e:
3277
if e.errno == errno.ENOENT:
3278
logger.warning("Could not load persistent state:"
3279
" {}".format(os.strerror(e.errno)))
3281
logger.critical("Could not load persistent state:",
3284
except EOFError as e:
3285
logger.warning("Could not load persistent state: "
3289
with PGPEngine() as pgp:
3290
for client_name, client in clients_data.items():
3291
# Skip removed clients
3292
if client_name not in client_settings:
3295
# Decide which value to use after restoring saved state.
3296
# We have three different values: Old config file,
3297
# new config file, and saved state.
3298
# New config value takes precedence if it differs from old
3299
# config value, otherwise use saved state.
3300
for name, value in client_settings[client_name].items():
3302
# For each value in new config, check if it
3303
# differs from the old config value (Except for
3304
# the "secret" attribute)
3305
if (name != "secret"
3307
old_client_settings[client_name][name])):
3308
client[name] = value
3312
# Clients who has passed its expire date can still be
3313
# enabled if its last checker was successful. A Client
3314
# whose checker succeeded before we stored its state is
3315
# assumed to have successfully run all checkers during
3317
if client["enabled"]:
3318
if datetime.datetime.utcnow() >= client["expires"]:
3319
if not client["last_checked_ok"]:
3321
"disabling client {} - Client never "
3322
"performed a successful checker".format(
3324
client["enabled"] = False
3325
elif client["last_checker_status"] != 0:
3327
"disabling client {} - Client last"
3328
" checker failed with error code"
3331
client["last_checker_status"]))
3332
client["enabled"] = False
3334
client["expires"] = (
3335
datetime.datetime.utcnow()
3336
+ client["timeout"])
3337
logger.debug("Last checker succeeded,"
3338
" keeping {} enabled".format(
1909
yield (name, special_settings[name]())
1913
tcp_server.clients.update(set(
1914
client_class(name = section,
1915
config= dict(client_config_items(
1916
client_config, section)))
1917
for section in client_config.sections()))
3341
client["secret"] = pgp.decrypt(
3342
client["encrypted_secret"],
3343
client_settings[client_name]["secret"])
3345
# If decryption fails, we use secret from new settings
3346
logger.debug("Failed to decrypt {} old secret".format(
3348
client["secret"] = (client_settings[client_name]
3351
# Add/remove clients based on new changes made to config
3352
for client_name in (set(old_client_settings)
3353
- set(client_settings)):
3354
del clients_data[client_name]
3355
for client_name in (set(client_settings)
3356
- set(old_client_settings)):
3357
clients_data[client_name] = client_settings[client_name]
3359
# Create all client objects
3360
for client_name, client in clients_data.items():
3361
tcp_server.clients[client_name] = client_class(
3364
server_settings=server_settings)
1918
3366
if not tcp_server.clients:
1919
3367
logger.warning("No clients defined")
1925
pidfile.write(str(pid) + "\n".encode("utf-8"))
1928
logger.error("Could not write to file %r with PID %d",
1931
# "pidfile" was never created
3370
if pidfile is not None:
3374
print(pid, file=pidfile)
3376
logger.error("Could not write to file %r with PID %d",
1933
3379
del pidfilename
1935
signal.signal(signal.SIGINT, signal.SIG_IGN)
1937
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1938
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3381
for termsig in (signal.SIGHUP, signal.SIGTERM):
3382
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3383
lambda: main_loop.quit() and False)
1941
class MandosDBusService(dbus.service.Object):
3387
@alternate_dbus_interfaces(
3388
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3389
class MandosDBusService(DBusObjectWithObjectManager):
1942
3390
"""A D-Bus proxy object"""
1943
3392
def __init__(self):
1944
3393
dbus.service.Object.__init__(self, bus, "/")
1945
_interface = "se.bsnet.fukt.Mandos"
3395
_interface = "se.recompile.Mandos"
1947
3397
@dbus.service.signal(_interface, signature="o")
1948
3398
def ClientAdded(self, objpath):
1952
3402
@dbus.service.signal(_interface, signature="ss")
1953
def ClientNotFound(self, fingerprint, address):
3403
def ClientNotFound(self, key_id, address):
3407
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
1957
3409
@dbus.service.signal(_interface, signature="os")
1958
3410
def ClientRemoved(self, objpath, name):
3414
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
1962
3416
@dbus.service.method(_interface, out_signature="ao")
1963
3417
def GetAllClients(self):
1965
return dbus.Array(c.dbus_object_path
1966
for c in tcp_server.clients)
3419
return dbus.Array(c.dbus_object_path for c in
3420
tcp_server.clients.values())
3422
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
1968
3424
@dbus.service.method(_interface,
1969
3425
out_signature="a{oa{sv}}")
1970
3426
def GetAllClientsWithProperties(self):
1972
3428
return dbus.Dictionary(
1973
((c.dbus_object_path, c.GetAll(""))
1974
for c in tcp_server.clients),
3429
{c.dbus_object_path: c.GetAll(
3430
"se.recompile.Mandos.Client")
3431
for c in tcp_server.clients.values()},
1975
3432
signature="oa{sv}")
1977
3434
@dbus.service.method(_interface, in_signature="o")
1978
3435
def RemoveClient(self, object_path):
1980
for c in tcp_server.clients:
3437
for c in tcp_server.clients.values():
1981
3438
if c.dbus_object_path == object_path:
1982
tcp_server.clients.remove(c)
3439
del tcp_server.clients[c.name]
1983
3440
c.remove_from_connection()
1984
# Don't signal anything except ClientRemoved
3441
# Don't signal the disabling
1985
3442
c.disable(quiet=True)
1987
self.ClientRemoved(object_path, c.name)
3443
# Emit D-Bus signal for removal
3444
self.client_removed_signal(c)
1989
3446
raise KeyError(object_path)
3450
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3451
out_signature="a{oa{sa{sv}}}")
3452
def GetManagedObjects(self):
3454
return dbus.Dictionary(
3455
{client.dbus_object_path:
3457
{interface: client.GetAll(interface)
3459
client._get_all_interface_names()})
3460
for client in tcp_server.clients.values()})
3462
def client_added_signal(self, client):
3463
"""Send the new standard signal and the old signal"""
3465
# New standard signal
3466
self.InterfacesAdded(
3467
client.dbus_object_path,
3469
{interface: client.GetAll(interface)
3471
client._get_all_interface_names()}))
3473
self.ClientAdded(client.dbus_object_path)
3475
def client_removed_signal(self, client):
3476
"""Send the new standard signal and the old signal"""
3478
# New standard signal
3479
self.InterfacesRemoved(
3480
client.dbus_object_path,
3481
client._get_all_interface_names())
3483
self.ClientRemoved(client.dbus_object_path,
1993
3486
mandos_dbus_service = MandosDBusService()
3488
# Save modules to variables to exempt the modules from being
3489
# unloaded before the function registered with atexit() is run.
3490
mp = multiprocessing
1996
3494
"Cleanup function; run on exit"
3498
mp.active_children()
3500
if not (tcp_server.clients or client_settings):
3503
# Store client before exiting. Secrets are encrypted with key
3504
# based on what config file has. If config file is
3505
# removed/edited, old secret will thus be unrecovable.
3507
with PGPEngine() as pgp:
3508
for client in tcp_server.clients.values():
3509
key = client_settings[client.name]["secret"]
3510
client.encrypted_secret = pgp.encrypt(client.secret,
3514
# A list of attributes that can not be pickled
3516
exclude = {"bus", "changedstate", "secret",
3517
"checker", "server_settings"}
3518
for name, typ in inspect.getmembers(dbus.service
3522
client_dict["encrypted_secret"] = (client
3524
for attr in client.client_structure:
3525
if attr not in exclude:
3526
client_dict[attr] = getattr(client, attr)
3528
clients[client.name] = client_dict
3529
del client_settings[client.name]["secret"]
3532
with tempfile.NamedTemporaryFile(
3536
dir=os.path.dirname(stored_state_path),
3537
delete=False) as stored_state:
3538
pickle.dump((clients, client_settings), stored_state,
3540
tempname = stored_state.name
3541
os.rename(tempname, stored_state_path)
3542
except (IOError, OSError) as e:
3548
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3549
logger.warning("Could not save persistent state: {}"
3550
.format(os.strerror(e.errno)))
3552
logger.warning("Could not save persistent state:",
3556
# Delete all clients, and settings from config
1999
3557
while tcp_server.clients:
2000
client = tcp_server.clients.pop()
3558
name, client = tcp_server.clients.popitem()
2002
3560
client.remove_from_connection()
2003
client.disable_hook = None
2004
# Don't signal anything except ClientRemoved
3561
# Don't signal the disabling
2005
3562
client.disable(quiet=True)
3563
# Emit D-Bus signal for removal
2008
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
3565
mandos_dbus_service.client_removed_signal(client)
3566
client_settings.clear()
2011
3568
atexit.register(cleanup)
2013
for client in tcp_server.clients:
3570
for client in tcp_server.clients.values():
2016
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3572
# Emit D-Bus signal for adding
3573
mandos_dbus_service.client_added_signal(client)
3574
# Need to initiate checking of clients
3576
client.init_checker()
2019
3578
tcp_server.enable()
2020
3579
tcp_server.server_activate()
2022
3581
# Find out what port we got
2023
service.port = tcp_server.socket.getsockname()[1]
3583
service.port = tcp_server.socket.getsockname()[1]
2025
3585
logger.info("Now listening on address %r, port %d,"
2026
" flowinfo %d, scope_id %d"
2027
% tcp_server.socket.getsockname())
3586
" flowinfo %d, scope_id %d",
3587
*tcp_server.socket.getsockname())
2029
logger.info("Now listening on address %r, port %d"
2030
% tcp_server.socket.getsockname())
2032
#service.interface = tcp_server.socket.getsockname()[3]
3589
logger.info("Now listening on address %r, port %d",
3590
*tcp_server.socket.getsockname())
3592
# service.interface = tcp_server.socket.getsockname()[3]
2035
# From the Avahi example code
2038
except dbus.exceptions.DBusException as error:
2039
logger.critical("DBusException: %s", error)
2042
# End of Avahi example code
2044
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2045
lambda *args, **kwargs:
2046
(tcp_server.handle_request
2047
(*args[2:], **kwargs) or True))
3596
# From the Avahi example code
3599
except dbus.exceptions.DBusException as error:
3600
logger.critical("D-Bus Exception", exc_info=error)
3603
# End of Avahi example code
3606
GLib.IOChannel.unix_new(tcp_server.fileno()),
3607
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
3608
lambda *args, **kwargs: (tcp_server.handle_request
3609
(*args[2:], **kwargs) or True))
2049
3611
logger.debug("Starting main loop")
2050
3612
main_loop.run()
2051
3613
except AvahiError as error:
2052
logger.critical("AvahiError: %s", error)
3614
logger.critical("Avahi Error", exc_info=error)
2055
3617
except KeyboardInterrupt: