63
import cPickle as pickle
70
import cPickle as pickle
64
73
import multiprocessing
69
83
import dbus.service
85
from gi.repository import GLib
72
86
from dbus.mainloop.glib import DBusGMainLoop
75
89
import xml.dom.minidom
77
import Crypto.Cipher.AES
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:
80
104
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
81
105
except AttributeError:
107
# This is where SO_BINDTODEVICE was up to and including Python
83
109
from IN import SO_BINDTODEVICE
84
110
except ImportError:
85
SO_BINDTODEVICE = None
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"
90
134
logger = logging.getLogger()
91
stored_state_path = "/var/lib/mandos/clients.pickle"
93
syslogger = (logging.handlers.SysLogHandler
94
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
95
address = str("/dev/log")))
96
syslogger.setFormatter(logging.Formatter
97
('Mandos [%(process)d]: %(levelname)s:'
99
logger.addHandler(syslogger)
101
console = logging.StreamHandler()
102
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
106
logger.addHandler(console)
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
109
317
class AvahiError(Exception):
110
318
def __init__(self, value, *args, **kwargs):
111
319
self.value = value
112
super(AvahiError, self).__init__(value, *args, **kwargs)
113
def __unicode__(self):
114
return unicode(repr(self.value))
320
return super(AvahiError, self).__init__(value, *args,
116
324
class AvahiServiceError(AvahiError):
119
328
class AvahiGroupError(AvahiError):
123
class AvahiService(object):
124
333
"""An Avahi (Zeroconf) service.
127
336
interface: integer; avahi.IF_UNSPEC or an interface index.
128
337
Used to optionally bind to the specified interface.
129
338
name: string; Example: 'Mandos'
130
339
type: string; Example: '_mandos._tcp'.
131
See <http://www.dns-sd.org/ServiceTypes.html>
340
See <https://www.iana.org/assignments/service-names-port-numbers>
132
341
port: integer; what port to announce
133
342
TXT: list of strings; TXT record for the service
134
343
domain: string; Domain to publish on, default to .local if empty.
263
502
follow_name_owner_changes=True),
264
503
avahi.DBUS_INTERFACE_SERVER)
265
504
self.server.connect_to_signal("StateChanged",
266
self.server_state_changed)
505
self.server_state_changed)
267
506
self.server_state_changed(self.server.GetState())
269
509
class AvahiServiceToSyslog(AvahiService):
510
def rename(self, *args, **kwargs):
271
511
"""Add the new name to the syslog messages"""
272
ret = AvahiService.rename(self)
273
syslogger.setFormatter(logging.Formatter
274
('Mandos (%s) [%%(process)d]:'
275
' %%(levelname)s: %%(message)s'
512
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
513
syslogger.setFormatter(logging.Formatter(
514
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
279
def _timedelta_to_milliseconds(td):
280
"Convert a datetime.timedelta() to milliseconds"
281
return ((td.days * 24 * 60 * 60 * 1000)
282
+ (td.seconds * 1000)
283
+ (td.microseconds // 1000))
285
class Client(object):
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))
286
832
"""A representation of a client host served by this server.
289
_approved: bool(); 'None' if not yet approved/disapproved
835
approved: bool(); 'None' if not yet approved/disapproved
290
836
approval_delay: datetime.timedelta(); Time to wait for approval
291
837
approval_duration: datetime.timedelta(); Duration of one approval
292
checker: subprocess.Popen(); a running checker process used
293
to see if the client lives.
294
'None' if no process is running.
295
checker_callback_tag: a gobject event source tag, or None
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
296
842
checker_command: string; External command which is run to check
297
843
if client lives. %() expansions are done at
298
844
runtime with vars(self) as dict, so that for
299
845
instance %(name)s can be used in the command.
300
checker_initiator_tag: a gobject event source tag, or None
846
checker_initiator_tag: a GLib event source tag, or None
301
847
created: datetime.datetime(); (UTC) object creation
302
848
client_structure: Object describing what attributes a client has
303
849
and is used for storing the client at exit
304
850
current_checker_command: string; current running checker_command
305
disable_initiator_tag: a gobject event source tag, or None
851
disable_initiator_tag: a GLib event source tag, or None
307
853
fingerprint: string (40 or 32 hexadecimal digits); used to
308
uniquely identify the client
854
uniquely identify an OpenPGP client
855
key_id: string (64 hexadecimal digits); used to uniquely identify
856
a client using raw public keys
309
857
host: string; available for use by the checker command
310
858
interval: datetime.timedelta(); How often to start a new checker
311
859
last_approval_request: datetime.datetime(); (UTC) or None
312
860
last_checked_ok: datetime.datetime(); (UTC) or None
313
861
last_checker_status: integer between 0 and 255 reflecting exit
314
status of last checker. -1 reflect crashed
316
last_enabled: datetime.datetime(); (UTC)
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
317
867
name: string; from the config file, used in log messages and
318
868
D-Bus identifiers
319
869
secret: bytestring; sent verbatim (over TLS) to client
320
870
timeout: datetime.timedelta(); How long from last_checked_ok
321
871
until this client is disabled
322
extended_timeout: extra long timeout when password has been sent
872
extended_timeout: extra long timeout when secret has been sent
323
873
runtime_expansions: Allowed attributes for runtime expansion.
324
874
expires: datetime.datetime(); time (UTC) when a client will be
325
875
disabled, or None
876
server_settings: The server_settings dict from main()
328
879
runtime_expansions = ("approval_delay", "approval_duration",
329
"created", "enabled", "fingerprint",
330
"host", "interval", "last_checked_ok",
880
"created", "enabled", "expires", "key_id",
881
"fingerprint", "host", "interval",
882
"last_approval_request", "last_checked_ok",
331
883
"last_enabled", "name", "timeout")
333
def timeout_milliseconds(self):
334
"Return the 'timeout' attribute in milliseconds"
335
return _timedelta_to_milliseconds(self.timeout)
337
def extended_timeout_milliseconds(self):
338
"Return the 'extended_timeout' attribute in milliseconds"
339
return _timedelta_to_milliseconds(self.extended_timeout)
341
def interval_milliseconds(self):
342
"Return the 'interval' attribute in milliseconds"
343
return _timedelta_to_milliseconds(self.interval)
345
def approval_delay_milliseconds(self):
346
return _timedelta_to_milliseconds(self.approval_delay)
348
def __init__(self, name = None, config=None):
349
"""Note: the 'checker' key in 'config' sets the
350
'checker_command' attribute and *not* the 'checker'
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):
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
355
969
logger.debug("Creating client %r", self.name)
356
# Uppercase and remove spaces from fingerprint for later
357
# comparison purposes with return value from the fingerprint()
359
self.fingerprint = (config["fingerprint"].upper()
970
logger.debug(" Key ID: %s", self.key_id)
361
971
logger.debug(" Fingerprint: %s", self.fingerprint)
362
if "secret" in config:
363
self.secret = config["secret"].decode("base64")
364
elif "secfile" in config:
365
with open(os.path.expanduser(os.path.expandvars
366
(config["secfile"])),
368
self.secret = secfile.read()
370
raise TypeError("No secret or secfile for client %s"
372
self.host = config.get("host", "")
373
self.created = datetime.datetime.utcnow()
375
self.last_approval_request = None
376
self.last_enabled = datetime.datetime.utcnow()
377
self.last_checked_ok = None
378
self.last_checker_status = None
379
self.timeout = string_to_delta(config["timeout"])
380
self.extended_timeout = string_to_delta(config
381
["extended_timeout"])
382
self.interval = string_to_delta(config["interval"])
972
self.created = settings.get("created",
973
datetime.datetime.utcnow())
975
# attributes specific for this server instance
383
976
self.checker = None
384
977
self.checker_initiator_tag = None
385
978
self.disable_initiator_tag = None
386
self.expires = datetime.datetime.utcnow() + self.timeout
387
979
self.checker_callback_tag = None
388
self.checker_command = config["checker"]
389
980
self.current_checker_command = None
390
self._approved = None
391
self.approved_by_default = config.get("approved_by_default",
393
982
self.approvals_pending = 0
394
self.approval_delay = string_to_delta(
395
config["approval_delay"])
396
self.approval_duration = string_to_delta(
397
config["approval_duration"])
398
self.changedstate = (multiprocessing_manager
399
.Condition(multiprocessing_manager
401
self.client_structure = [attr for attr
402
in self.__dict__.iterkeys()
983
self.changedstate = multiprocessing_manager.Condition(
984
multiprocessing_manager.Lock())
985
self.client_structure = [attr
986
for attr in self.__dict__.keys()
403
987
if not attr.startswith("_")]
404
988
self.client_structure.append("client_structure")
407
for name, t in inspect.getmembers(type(self),
990
for name, t in inspect.getmembers(
991
type(self), lambda obj: isinstance(obj, property)):
411
992
if not name.startswith("_"):
412
993
self.client_structure.append(name)
414
995
# Send notice to process children that client state has changed
415
996
def send_changedstate(self):
416
997
with self.changedstate:
417
998
self.changedstate.notify_all()
419
1000
def enable(self):
420
1001
"""Start this client's checker and timeout hooks"""
421
1002
if getattr(self, "enabled", False):
422
1003
# Already enabled
424
self.send_changedstate()
425
1005
self.expires = datetime.datetime.utcnow() + self.timeout
426
1006
self.enabled = True
427
1007
self.last_enabled = datetime.datetime.utcnow()
428
1008
self.init_checker()
1009
self.send_changedstate()
430
1011
def disable(self, quiet=True):
431
1012
"""Disable this client."""
432
1013
if not getattr(self, "enabled", False):
435
self.send_changedstate()
437
1016
logger.info("Disabling client %s", self.name)
438
if getattr(self, "disable_initiator_tag", False):
439
gobject.source_remove(self.disable_initiator_tag)
1017
if getattr(self, "disable_initiator_tag", None) is not None:
1018
GLib.source_remove(self.disable_initiator_tag)
440
1019
self.disable_initiator_tag = None
441
1020
self.expires = None
442
if getattr(self, "checker_initiator_tag", False):
443
gobject.source_remove(self.checker_initiator_tag)
1021
if getattr(self, "checker_initiator_tag", None) is not None:
1022
GLib.source_remove(self.checker_initiator_tag)
444
1023
self.checker_initiator_tag = None
445
1024
self.stop_checker()
446
1025
self.enabled = False
447
# Do not run this again if called by a gobject.timeout_add
1027
self.send_changedstate()
1028
# Do not run this again if called by a GLib.timeout_add
450
1031
def __del__(self):
453
1034
def init_checker(self):
454
1035
# Schedule a new checker to be started an 'interval' from now,
455
1036
# and every interval from then on.
456
self.checker_initiator_tag = (gobject.timeout_add
457
(self.interval_milliseconds(),
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),
459
1042
# Schedule a disable() when 'timeout' has passed
460
self.disable_initiator_tag = (gobject.timeout_add
461
(self.timeout_milliseconds(),
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)
463
1047
# Also start a new checker *right now*.
464
1048
self.start_checker()
467
def checker_callback(self, pid, condition, command):
1050
def checker_callback(self, source, condition, connection,
468
1052
"""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:
469
1058
self.checker_callback_tag = None
470
1059
self.checker = None
471
if os.WIFEXITED(condition):
472
self.last_checker_status = os.WEXITSTATUS(condition)
1062
self.last_checker_status = returncode
1063
self.last_checker_signal = None
473
1064
if self.last_checker_status == 0:
474
1065
logger.info("Checker for %(name)s succeeded",
476
1067
self.checked_ok()
478
logger.info("Checker for %(name)s failed",
1069
logger.info("Checker for %(name)s failed", vars(self))
481
1071
self.last_checker_status = -1
1072
self.last_checker_signal = -returncode
482
1073
logger.warning("Checker for %(name)s crashed?",
485
def checked_ok(self, timeout=None):
486
"""Bump up the timeout for this client.
488
This should only be called when the client has been seen,
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."""
491
1086
if timeout is None:
492
1087
timeout = self.timeout
493
self.last_checked_ok = datetime.datetime.utcnow()
494
1088
if self.disable_initiator_tag is not None:
495
gobject.source_remove(self.disable_initiator_tag)
1089
GLib.source_remove(self.disable_initiator_tag)
1090
self.disable_initiator_tag = None
496
1091
if getattr(self, "enabled", False):
497
self.disable_initiator_tag = (gobject.timeout_add
498
(_timedelta_to_milliseconds
499
(timeout), self.disable))
1092
self.disable_initiator_tag = GLib.timeout_add(
1093
int(timeout.total_seconds() * 1000), self.disable)
500
1094
self.expires = datetime.datetime.utcnow() + timeout
502
1096
def need_approval(self):
503
1097
self.last_approval_request = datetime.datetime.utcnow()
505
1099
def start_checker(self):
506
1100
"""Start a new checker subprocess if one is not running.
508
1102
If a checker already exists, leave it running and do
510
1104
# The reason for not killing a running checker is that if we
511
# did that, then if a checker (for some reason) started
512
# running slowly and taking more than 'interval' time, the
513
# client would inevitably timeout, since no checker would get
514
# a chance to run to completion. If we instead leave running
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
515
1109
# checkers alone, the checker would have to take more time
516
1110
# than 'timeout' for the client to be disabled, which is as it
519
# If a checker exists, make sure it is not a zombie
521
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
522
except (AttributeError, OSError) as error:
523
if (isinstance(error, OSError)
524
and error.errno != errno.ECHILD):
528
logger.warning("Checker was a zombie")
529
gobject.source_remove(self.checker_callback_tag)
530
self.checker_callback(pid, status,
531
self.current_checker_command)
1113
if self.checker is not None and not self.checker.is_alive():
1114
logger.warning("Checker was not alive; joining")
532
1117
# Start a new checker if needed
533
1118
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}
535
# In case checker_command has exactly one % operator
536
command = self.checker_command % self.host
538
# Escape attributes for the shell
539
escaped_attrs = dict(
541
re.escape(unicode(str(getattr(self, attr, "")),
545
self.runtime_expansions)
548
command = self.checker_command % escaped_attrs
549
except TypeError as error:
550
logger.error('Could not format string "%s":'
551
' %s', self.checker_command, error)
552
return True # Try again later
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
553
1130
self.current_checker_command = command
555
logger.info("Starting checker %r for %s",
557
# We don't need to redirect stdout and stderr, since
558
# in normal mode, that is already done by daemon(),
559
# and in debug mode we don't want to. (Stdin is
560
# always replaced by /dev/null.)
561
self.checker = subprocess.Popen(command,
564
self.checker_callback_tag = (gobject.child_watch_add
566
self.checker_callback,
568
# The checker may have completed before the gobject
569
# watch was added. Check for this.
570
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
572
gobject.source_remove(self.checker_callback_tag)
573
self.checker_callback(pid, status, command)
574
except OSError as error:
575
logger.error("Failed to start subprocess: %s",
577
# Re-run this periodically if run by gobject.timeout_add
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
580
1160
def stop_checker(self):
581
1161
"""Force the checker process, if any, to stop."""
582
1162
if self.checker_callback_tag:
583
gobject.source_remove(self.checker_callback_tag)
1163
GLib.source_remove(self.checker_callback_tag)
584
1164
self.checker_callback_tag = None
585
1165
if getattr(self, "checker", None) is None:
587
1167
logger.debug("Stopping checker for %(name)s", vars(self))
589
os.kill(self.checker.pid, signal.SIGTERM)
591
#if self.checker.poll() is None:
592
# os.kill(self.checker.pid, signal.SIGKILL)
593
except OSError as error:
594
if error.errno != errno.ESRCH: # No such process
1168
self.checker.terminate()
596
1169
self.checker = None
598
# Encrypts a client secret and stores it in a varible
600
def encrypt_secret(self, key):
601
# Encryption-key need to be of a specific size, so we hash
603
hasheng = hashlib.sha256()
605
encryptionkey = hasheng.digest()
607
# Create validation hash so we know at decryption if it was
609
hasheng = hashlib.sha256()
610
hasheng.update(self.secret)
611
validationhash = hasheng.digest()
614
iv = os.urandom(Crypto.Cipher.AES.block_size)
615
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
616
Crypto.Cipher.AES.MODE_CFB, iv)
617
ciphertext = ciphereng.encrypt(validationhash+self.secret)
618
self.encrypted_secret = (ciphertext, iv)
620
# Decrypt a encrypted client secret
621
def decrypt_secret(self, key):
622
# Decryption-key need to be of a specific size, so we hash
624
hasheng = hashlib.sha256()
626
encryptionkey = hasheng.digest()
628
# Decrypt encrypted secret
629
ciphertext, iv = self.encrypted_secret
630
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
631
Crypto.Cipher.AES.MODE_CFB, iv)
632
plain = ciphereng.decrypt(ciphertext)
634
# Validate decrypted secret to know if it was succesful
635
hasheng = hashlib.sha256()
636
validationhash = plain[:hasheng.digest_size]
637
secret = plain[hasheng.digest_size:]
638
hasheng.update(secret)
640
# If validation fails, we use key as new secret. Otherwise, we
641
# use the decrypted secret
642
if hasheng.digest() == validationhash:
646
del self.encrypted_secret
649
def dbus_service_property(dbus_interface, signature="v",
650
access="readwrite", byte_arrays=False):
1172
def dbus_service_property(dbus_interface,
651
1176
"""Decorators for marking methods of a DBusObjectWithProperties to
652
1177
become properties on the D-Bus.
654
1179
The decorated method will be called with no arguments by "Get"
655
1180
and with one argument by "Set".
657
1182
The parameters, where they are supported, are the same as
658
1183
dbus.service.method, except there is only "signature", since the
659
1184
type from Get() and the type sent to Set() is the same.
829
1517
except (AttributeError, xml.dom.DOMException,
830
1518
xml.parsers.expat.ExpatError) as error:
831
1519
logger.error("Failed to override Introspection method",
836
def datetime_to_dbus (dt, variant_level=0):
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):
837
1596
"""Convert a UTC datetime.datetime() to a D-Bus type."""
839
return dbus.String("", variant_level = variant_level)
840
return dbus.String(dt.isoformat(),
841
variant_level=variant_level)
843
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
845
"""Applied to an empty subclass of a D-Bus object, this metaclass
846
will add additional D-Bus attributes matching a certain pattern.
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).
848
def __new__(mcs, name, bases, attr):
849
# Go through all the base classes which could have D-Bus
850
# methods, signals, or properties in them
851
for base in (b for b in bases
852
if issubclass(b, dbus.service.Object)):
853
# Go though all attributes of the base class
854
for attrname, attribute in inspect.getmembers(base):
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):
855
1633
# Ignore non-D-Bus attributes, and D-Bus attributes
856
1634
# with the wrong interface name
857
1635
if (not hasattr(attribute, "_dbus_interface")
858
or not attribute._dbus_interface
859
.startswith("se.recompile.Mandos")):
1636
or not attribute._dbus_interface.startswith(
1637
orig_interface_name)):
861
1639
# Create an alternate D-Bus interface name based on
862
1640
# the current name
863
alt_interface = (attribute._dbus_interface
864
.replace("se.recompile.Mandos",
865
"se.bsnet.fukt.Mandos"))
1641
alt_interface = attribute._dbus_interface.replace(
1642
orig_interface_name, alt_interface_name)
1643
interface_names.add(alt_interface)
866
1644
# Is this a D-Bus signal?
867
1645
if getattr(attribute, "_dbus_is_signal", False):
868
# Extract the original non-method function by
870
nonmethod_func = (dict(
1646
# Extract the original non-method undecorated
1647
# function by black magic
1648
if sys.version_info.major == 2:
1649
nonmethod_func = (dict(
871
1650
zip(attribute.func_code.co_freevars,
872
attribute.__closure__))["func"]
1651
attribute.__closure__))
1652
["func"].cell_contents)
1654
nonmethod_func = (dict(
1655
zip(attribute.__code__.co_freevars,
1656
attribute.__closure__))
1657
["func"].cell_contents)
874
1658
# Create a new, but exactly alike, function
875
1659
# object, and decorate it to be a new D-Bus signal
876
1660
# with the alternate D-Bus interface name
877
new_function = (dbus.service.signal
879
attribute._dbus_signature)
881
nonmethod_func.func_code,
882
nonmethod_func.func_globals,
883
nonmethod_func.func_name,
884
nonmethod_func.func_defaults,
885
nonmethod_func.func_closure)))
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:
886
1672
# Define a creator of a function to call both the
887
# old and new functions, so both the old and new
888
# signals gets sent when the function is called
1673
# original and alternate functions, so both the
1674
# original and alternate signals gets sent when
1675
# the function is called
889
1676
def fixscope(func1, func2):
890
1677
"""This function is a scope container to pass
891
1678
func1 and func2 to the "call_both" function
892
1679
outside of its arguments"""
1681
@functools.wraps(func2)
893
1682
def call_both(*args, **kwargs):
894
1683
"""This function will emit two D-Bus
895
1684
signals by calling func1 and func2"""
896
1685
func1(*args, **kwargs)
897
1686
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)
898
1693
return call_both
899
1694
# Create the "call_both" function and add it to
901
attr[attrname] = fixscope(attribute,
1696
attr[attrname] = fixscope(attribute, new_function)
903
1697
# Is this a D-Bus method?
904
1698
elif getattr(attribute, "_dbus_is_method", False):
905
1699
# Create a new, but exactly alike, function
906
1700
# object. Decorate it to be a new D-Bus method
907
1701
# with the alternate D-Bus interface name. Add it
909
attr[attrname] = (dbus.service.method
911
attribute._dbus_in_signature,
912
attribute._dbus_out_signature)
914
(attribute.func_code,
915
attribute.func_globals,
917
attribute.func_defaults,
918
attribute.func_closure)))
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:
919
1715
# Is this a D-Bus property?
920
1716
elif getattr(attribute, "_dbus_is_property", False):
921
1717
# Create a new, but exactly alike, function
922
1718
# object, and decorate it to be a new D-Bus
923
1719
# property with the alternate D-Bus interface
924
1720
# name. Add it to the class.
925
attr[attrname] = (dbus_service_property
927
attribute._dbus_signature,
928
attribute._dbus_access,
930
._dbus_get_args_options
933
(attribute.func_code,
934
attribute.func_globals,
936
attribute.func_defaults,
937
attribute.func_closure)))
938
return type.__new__(mcs, name, bases, attr)
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"})
940
1773
class ClientDBus(Client, DBusObjectWithProperties):
941
1774
"""A Client class using D-Bus
944
1777
dbus_object_path: dbus.ObjectPath
945
1778
bus: dbus.SystemBus()
948
1781
runtime_expansions = (Client.runtime_expansions
949
+ ("dbus_object_path",))
1782
+ ("dbus_object_path", ))
1784
_interface = "se.recompile.Mandos.Client"
951
1786
# dbus.service.Object doesn't use super(), so we can't either.
953
def __init__(self, bus = None, *args, **kwargs):
1788
def __init__(self, bus=None, *args, **kwargs):
955
self._approvals_pending = 0
956
1790
Client.__init__(self, *args, **kwargs)
959
def add_to_dbus(self):
960
1791
# Only now, when this client is initialized, can it show up on
962
client_object_name = unicode(self.name).translate(
1793
client_object_name = str(self.name).translate(
963
1794
{ord("."): ord("_"),
964
1795
ord("-"): ord("_")})
965
self.dbus_object_path = (dbus.ObjectPath
966
("/clients/" + client_object_name))
1796
self.dbus_object_path = dbus.ObjectPath(
1797
"/clients/" + client_object_name)
967
1798
DBusObjectWithProperties.__init__(self, self.bus,
968
1799
self.dbus_object_path)
970
def notifychangeproperty(transform_func,
971
dbus_name, type_func=lambda x: x,
1801
def notifychangeproperty(transform_func, dbus_name,
1802
type_func=lambda x: x,
1804
invalidate_only=False,
1805
_interface=_interface):
973
1806
""" Modify a variable so that it's a property which announces
974
1807
its changes to DBus.
1326
2202
self.start_checker()
1328
2204
self.stop_checker()
1330
2206
# ObjectPath - property
2208
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2209
"org.freedesktop.DBus.Deprecated": "true"})
1331
2210
@dbus_service_property(_interface, signature="o", access="read")
1332
2211
def ObjectPath_dbus_property(self):
1333
return self.dbus_object_path # is already a dbus.ObjectPath
2212
return self.dbus_object_path # is already a dbus.ObjectPath
1335
2214
# Secret = property
1336
@dbus_service_property(_interface, signature="ay",
1337
access="write", byte_arrays=True)
2216
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2218
@dbus_service_property(_interface,
1338
2222
def Secret_dbus_property(self, value):
1339
self.secret = str(value)
2223
self.secret = bytes(value)
1344
class ProxyClient(object):
1345
def __init__(self, child_pipe, fpr, address):
2229
def __init__(self, child_pipe, key_id, fpr, address):
1346
2230
self._pipe = child_pipe
1347
self._pipe.send(('init', fpr, address))
2231
self._pipe.send(('init', key_id, fpr, address))
1348
2232
if not self._pipe.recv():
2233
raise KeyError(key_id or fpr)
1351
2235
def __getattribute__(self, name):
1352
if(name == '_pipe'):
1353
2237
return super(ProxyClient, self).__getattribute__(name)
1354
2238
self._pipe.send(('getattr', name))
1355
2239
data = self._pipe.recv()
1356
2240
if data[0] == 'data':
1358
2242
if data[0] == 'function':
1359
2244
def func(*args, **kwargs):
1360
2245
self._pipe.send(('funcall', name, args, kwargs))
1361
2246
return self._pipe.recv()[1]
1364
2250
def __setattr__(self, name, value):
1365
if(name == '_pipe'):
1366
2252
return super(ProxyClient, self).__setattr__(name, value)
1367
2253
self._pipe.send(('setattr', name, value))
1369
class ClientDBusTransitional(ClientDBus):
1370
__metaclass__ = AlternateDBusNamesMetaclass
1372
2256
class ClientHandler(socketserver.BaseRequestHandler, object):
1373
2257
"""A class to handle client connections.
1375
2259
Instantiated once for each connection to handle it.
1376
2260
Note: This will run in its own forked process."""
1378
2262
def handle(self):
1379
2263
with contextlib.closing(self.server.child_pipe) as child_pipe:
1380
2264
logger.info("TCP connection from: %s",
1381
unicode(self.client_address))
2265
str(self.client_address))
1382
2266
logger.debug("Pipe FD: %d",
1383
2267
self.server.child_pipe.fileno())
1385
session = (gnutls.connection
1386
.ClientSession(self.request,
1388
.X509Credentials()))
1390
# Note: gnutls.connection.X509Credentials is really a
1391
# generic GnuTLS certificate credentials object so long as
1392
# no X.509 keys are added to it. Therefore, we can use it
1393
# here despite using OpenPGP certificates.
1395
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1396
# "+AES-256-CBC", "+SHA1",
1397
# "+COMP-NULL", "+CTYPE-OPENPGP",
2269
session = gnutls.ClientSession(self.request)
2271
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2272
# "+AES-256-CBC", "+SHA1",
2273
# "+COMP-NULL", "+CTYPE-OPENPGP",
1399
2275
# Use a fallback default, since this MUST be set.
1400
2276
priority = self.server.gnutls_priority
1401
2277
if priority is None:
1402
2278
priority = "NORMAL"
1403
(gnutls.library.functions
1404
.gnutls_priority_set_direct(session._c_object,
2279
gnutls.priority_set_direct(session._c_object,
2280
priority.encode("utf-8"),
1407
2283
# Start communication using the Mandos protocol
1408
2284
# Get protocol number
1409
2285
line = self.request.makefile().readline()
1410
2286
logger.debug("Protocol version: %r", line)
1412
2288
if int(line.strip().split()[0]) > 1:
2289
raise RuntimeError(line)
1414
2290
except (ValueError, IndexError, RuntimeError) as error:
1415
2291
logger.error("Unknown protocol version: %s", error)
1418
2294
# Start GnuTLS connection
1420
2296
session.handshake()
1421
except gnutls.errors.GNUTLSError as error:
2297
except gnutls.Error as error:
1422
2298
logger.warning("Handshake failed: %s", error)
1423
2299
# Do not run session.bye() here: the session is not
1424
2300
# established. Just abandon the request.
1426
2302
logger.debug("Handshake succeeded")
1428
2304
approval_required = False
1431
fpr = self.fingerprint(self.peer_certificate
1434
gnutls.errors.GNUTLSError) as error:
1435
logger.warning("Bad certificate: %s", error)
1437
logger.debug("Fingerprint: %s", fpr)
1440
client = ProxyClient(child_pipe, fpr,
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,
1441
2328
self.client_address)
1442
2329
except KeyError:
1445
2332
if client.approval_delay:
1446
2333
delay = client.approval_delay
1447
2334
client.approvals_pending += 1
1448
2335
approval_required = True
1451
2338
if not client.enabled:
1452
2339
logger.info("Client %s is disabled",
1454
2341
if self.server.use_dbus:
1455
2342
# Emit D-Bus signal
1456
2343
client.Rejected("Disabled")
1459
if client._approved or not client.approval_delay:
1460
#We are approved or approval is disabled
2346
if client.approved or not client.approval_delay:
2347
# We are approved or approval is disabled
1462
elif client._approved is None:
2349
elif client.approved is None:
1463
2350
logger.info("Client %s needs approval",
1465
2352
if self.server.use_dbus:
1466
2353
# Emit D-Bus signal
1467
2354
client.NeedApproval(
1468
client.approval_delay_milliseconds(),
1469
client.approved_by_default)
2355
client.approval_delay.total_seconds()
2356
* 1000, client.approved_by_default)
1471
2358
logger.warning("Client %s was not approved",
1498
2383
delay -= time2 - time
1501
while sent_size < len(client.secret):
1503
sent = session.send(client.secret[sent_size:])
1504
except gnutls.errors.GNUTLSError as error:
1505
logger.warning("gnutls send failed")
1507
logger.debug("Sent: %d, remaining: %d",
1508
sent, len(client.secret)
1509
- (sent_size + sent))
2386
session.send(client.secret)
2387
except gnutls.Error as error:
2388
logger.warning("gnutls send failed",
1512
2392
logger.info("Sending secret to %s", client.name)
1513
2393
# bump the timeout using extended_timeout
1514
client.checked_ok(client.extended_timeout)
2394
client.bump_timeout(client.extended_timeout)
1515
2395
if self.server.use_dbus:
1516
2396
# Emit D-Bus signal
1517
2397
client.GotSecret()
1520
2400
if approval_required:
1521
2401
client.approvals_pending -= 1
1524
except gnutls.errors.GNUTLSError as error:
1525
logger.warning("GnuTLS bye failed")
2404
except gnutls.Error as error:
2405
logger.warning("GnuTLS bye failed",
1528
2409
def peer_certificate(session):
1529
"Return the peer's OpenPGP certificate as a bytestring"
1530
# If not an OpenPGP certificate...
1531
if (gnutls.library.functions
1532
.gnutls_certificate_type_get(session._c_object)
1533
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1534
# ...do the normal thing
1535
return session.peer_certificate
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
1536
2426
list_size = ctypes.c_uint(1)
1537
cert_list = (gnutls.library.functions
1538
.gnutls_certificate_get_peers
2427
cert_list = (gnutls.certificate_get_peers
1539
2428
(session._c_object, ctypes.byref(list_size)))
1540
2429
if not bool(cert_list) and list_size.value != 0:
1541
raise gnutls.errors.GNUTLSError("error getting peer"
2430
raise gnutls.Error("error getting peer certificate")
1543
2431
if list_size.value == 0:
1545
2433
cert = cert_list[0]
1546
2434
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()
1549
2471
def fingerprint(openpgp):
1550
2472
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1551
2473
# New GnuTLS "datum" with the OpenPGP public key
1552
datum = (gnutls.library.types
1553
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1556
ctypes.c_uint(len(openpgp))))
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)))
1557
2478
# New empty GnuTLS certificate
1558
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1559
(gnutls.library.functions
1560
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2479
crt = gnutls.openpgp_crt_t()
2480
gnutls.openpgp_crt_init(ctypes.byref(crt))
1561
2481
# Import the OpenPGP public key into the certificate
1562
(gnutls.library.functions
1563
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1564
gnutls.library.constants
1565
.GNUTLS_OPENPGP_FMT_RAW))
2482
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2483
gnutls.OPENPGP_FMT_RAW)
1566
2484
# Verify the self signature in the key
1567
2485
crtverify = ctypes.c_uint()
1568
(gnutls.library.functions
1569
.gnutls_openpgp_crt_verify_self(crt, 0,
1570
ctypes.byref(crtverify)))
2486
gnutls.openpgp_crt_verify_self(crt, 0,
2487
ctypes.byref(crtverify))
1571
2488
if crtverify.value != 0:
1572
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1573
raise (gnutls.errors.CertificateSecurityError
2489
gnutls.openpgp_crt_deinit(crt)
2490
raise gnutls.CertificateSecurityError(code
1575
2492
# New buffer for the fingerprint
1576
2493
buf = ctypes.create_string_buffer(20)
1577
2494
buf_len = ctypes.c_size_t()
1578
2495
# Get the fingerprint from the certificate into the buffer
1579
(gnutls.library.functions
1580
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1581
ctypes.byref(buf_len)))
2496
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2497
ctypes.byref(buf_len))
1582
2498
# Deinit the certificate
1583
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2499
gnutls.openpgp_crt_deinit(crt)
1584
2500
# Convert the buffer to a Python bytestring
1585
2501
fpr = ctypes.string_at(buf, buf_len.value)
1586
2502
# Convert the bytestring to hexadecimal notation
1587
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2503
hex_fpr = binascii.hexlify(fpr).upper()
1591
class MultiprocessingMixIn(object):
2507
class MultiprocessingMixIn:
1592
2508
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1593
2510
def sub_process_main(self, request, address):
1595
2512
self.finish_request(request, address)
1597
2514
self.handle_error(request, address)
1598
2515
self.close_request(request)
1600
2517
def process_request(self, request, address):
1601
2518
"""Start a new process to process the request."""
1602
proc = multiprocessing.Process(target = self.sub_process_main,
2519
proc = multiprocessing.Process(target=self.sub_process_main,
2520
args=(request, address))
1609
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2525
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
1610
2526
""" adds a pipe to the MixIn """
1611
2528
def process_request(self, request, client_address):
1612
2529
"""Overrides and wraps the original process_request().
1614
2531
This function creates a new pipe in self.pipe
1616
2533
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1618
2535
proc = MultiprocessingMixIn.process_request(self, request,
1619
2536
client_address)
1620
2537
self.child_pipe.close()
1621
2538
self.add_pipe(parent_pipe, proc)
1623
2540
def add_pipe(self, parent_pipe, proc):
1624
2541
"""Dummy function; override as necessary"""
1625
raise NotImplementedError
2542
raise NotImplementedError()
1628
2545
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1629
socketserver.TCPServer, object):
2546
socketserver.TCPServer):
1630
2547
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1633
2550
enabled: Boolean; whether this server is activated yet
1634
2551
interface: None or a network interface name (string)
1635
2552
use_ipv6: Boolean; to use IPv6 or not
1637
2555
def __init__(self, server_address, RequestHandlerClass,
1638
interface=None, use_ipv6=True):
2559
"""If socketfd is set, use that file descriptor instead of
2560
creating a new one with socket.socket().
1639
2562
self.interface = interface
1641
2564
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.
1642
2592
socketserver.TCPServer.__init__(self, server_address,
1643
2593
RequestHandlerClass)
1644
2595
def server_bind(self):
1645
2596
"""This overrides the normal server_bind() function
1646
2597
to bind to an interface if one was specified, and also NOT to
1647
2598
bind to an address or port if they were not specified."""
2599
global SO_BINDTODEVICE
1648
2600
if self.interface is not None:
1649
2601
if SO_BINDTODEVICE is None:
1650
logger.error("SO_BINDTODEVICE does not exist;"
1651
" cannot bind to interface %s",
1655
self.socket.setsockopt(socket.SOL_SOCKET,
1659
except socket.error as error:
1660
if error[0] == errno.EPERM:
1661
logger.error("No permission to"
1662
" bind to interface %s",
1664
elif error[0] == errno.ENOPROTOOPT:
1665
logger.error("SO_BINDTODEVICE not available;"
1666
" cannot bind to interface %s",
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)
1670
2623
# Only bind(2) the socket if we really need to.
1671
2624
if self.server_address[0] or self.server_address[1]:
2625
if self.server_address[1]:
2626
self.allow_reuse_address = True
1672
2627
if not self.server_address[0]:
1673
2628
if self.address_family == socket.AF_INET6:
1674
any_address = "::" # in6addr_any
2629
any_address = "::" # in6addr_any
1676
any_address = socket.INADDR_ANY
2631
any_address = "0.0.0.0" # INADDR_ANY
1677
2632
self.server_address = (any_address,
1678
2633
self.server_address[1])
1679
2634
elif not self.server_address[1]:
1680
self.server_address = (self.server_address[0],
2635
self.server_address = (self.server_address[0], 0)
1682
2636
# if self.interface:
1683
2637
# self.server_address = (self.server_address[0],
1929
2965
parser.add_argument("--no-dbus", action="store_false",
1930
2966
dest="use_dbus", help="Do not provide D-Bus"
1931
" system bus interface")
2967
" system bus interface", default=None)
1932
2968
parser.add_argument("--no-ipv6", action="store_false",
1933
dest="use_ipv6", help="Do not use IPv6")
2969
dest="use_ipv6", help="Do not use IPv6",
1934
2971
parser.add_argument("--no-restore", action="store_false",
1936
help="Do not restore stored state",
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",
1939
2985
options = parser.parse_args()
1946
2987
# Default values for config file for server-global settings
1947
server_defaults = { "interface": "",
1952
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1953
"servicename": "Mandos",
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",
1959
3011
# Parse config file for server-global settings
1960
server_config = configparser.SafeConfigParser(server_defaults)
3012
server_config = configparser.ConfigParser(server_defaults)
1961
3013
del server_defaults
1962
server_config.read(os.path.join(options.configdir,
1964
# Convert the SafeConfigParser object to a dict
3014
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3015
# Convert the ConfigParser object to a dict
1965
3016
server_settings = server_config.defaults()
1966
3017
# Use the appropriate methods on the non-string config options
1967
for option in ("debug", "use_dbus", "use_ipv6"):
3018
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3019
"foreground", "zeroconf"):
1968
3020
server_settings[option] = server_config.getboolean("DEFAULT",
1970
3022
if server_settings["port"]:
1971
3023
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
1973
3034
del server_config
1975
3036
# Override the settings from the config file with command line
1976
3037
# options, if set.
1977
3038
for option in ("interface", "address", "port", "debug",
1978
"priority", "servicename", "configdir",
1979
"use_dbus", "use_ipv6", "debuglevel", "restore"):
3039
"priority", "servicename", "configdir", "use_dbus",
3040
"use_ipv6", "debuglevel", "restore", "statedir",
3041
"socket", "foreground", "zeroconf"):
1980
3042
value = getattr(options, option)
1981
3043
if value is not None:
1982
3044
server_settings[option] = value
1984
3046
# Force all strings to be unicode
1985
3047
for option in server_settings.keys():
1986
if type(server_settings[option]) is str:
1987
server_settings[option] = unicode(server_settings[option])
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
1988
3058
# Now we have our good server settings in "server_settings"
1990
3060
##################################################################
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")
1992
3067
# For convenience
1993
3068
debug = server_settings["debug"]
1994
3069
debuglevel = server_settings["debuglevel"]
1995
3070
use_dbus = server_settings["use_dbus"]
1996
3071
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)
1998
3086
if server_settings["servicename"] != "Mandos":
1999
syslogger.setFormatter(logging.Formatter
2000
('Mandos (%s) [%%(process)d]:'
2001
' %%(levelname)s: %%(message)s'
2002
% server_settings["servicename"]))
3087
syslogger.setFormatter(
3088
logging.Formatter('Mandos ({}) [%(process)d]:'
3089
' %(levelname)s: %(message)s'.format(
3090
server_settings["servicename"])))
2004
3092
# Parse config file with clients
2005
client_defaults = { "timeout": "5m",
2006
"extended_timeout": "15m",
2008
"checker": "fping -q -- %%(host)s",
2010
"approval_delay": "0s",
2011
"approval_duration": "1s",
2013
client_config = configparser.SafeConfigParser(client_defaults)
3093
client_config = configparser.ConfigParser(Client.client_defaults)
2014
3094
client_config.read(os.path.join(server_settings["configdir"],
2015
3095
"clients.conf"))
2017
3097
global mandos_dbus_service
2018
3098
mandos_dbus_service = None
2020
tcp_server = MandosServer((server_settings["address"],
2021
server_settings["port"]),
2023
interface=(server_settings["interface"]
2027
server_settings["priority"],
2030
pidfilename = "/var/run/mandos.pid"
2032
pidfile = open(pidfilename, "w")
2034
logger.error("Could not open file %r", pidfilename)
2037
uid = pwd.getpwnam("_mandos").pw_uid
2038
gid = pwd.getpwnam("_mandos").pw_gid
2041
uid = pwd.getpwnam("mandos").pw_uid
2042
gid = pwd.getpwnam("mandos").pw_gid
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
2043
3129
except KeyError:
2045
uid = pwd.getpwnam("nobody").pw_uid
2046
gid = pwd.getpwnam("nobody").pw_gid
3138
logger.debug("Did setuid/setgid to {}:{}".format(uid,
2053
3140
except OSError as error:
2054
if error[0] != errno.EPERM:
2057
if not debug and not debuglevel:
2058
logger.setLevel(logging.WARNING)
2060
level = getattr(logging, debuglevel.upper())
2061
logger.setLevel(level)
3141
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3142
.format(uid, gid, os.strerror(error.errno)))
3143
if error.errno != errno.EPERM:
2064
logger.setLevel(logging.DEBUG)
2065
3147
# Enable all possible GnuTLS debugging
2067
3149
# "Use a log level over 10 to enable all debugging options."
2068
3150
# - GnuTLS manual
2069
gnutls.library.functions.gnutls_global_set_log_level(11)
2071
@gnutls.library.types.gnutls_log_func
3151
gnutls.global_set_log_level(11)
2072
3154
def debug_gnutls(level, string):
2073
3155
logger.debug("GnuTLS: %s", string[:-1])
2075
(gnutls.library.functions
2076
.gnutls_global_set_log_function(debug_gnutls))
3157
gnutls.global_set_log_function(debug_gnutls)
2078
3159
# Redirect stdin so all checkers get /dev/null
2079
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3160
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2080
3161
os.dup2(null, sys.stdin.fileno())
2084
# No console logging
2085
logger.removeHandler(console)
2087
3165
# Need to fork before connecting to D-Bus
2089
3167
# 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.
2092
3175
global main_loop
2093
3176
# From the Avahi example code
2094
DBusGMainLoop(set_as_default=True )
2095
main_loop = gobject.MainLoop()
3177
DBusGMainLoop(set_as_default=True)
3178
main_loop = GLib.MainLoop()
2096
3179
bus = dbus.SystemBus()
2097
3180
# End of Avahi example code
2100
3183
bus_name = dbus.service.BusName("se.recompile.Mandos",
2101
bus, do_not_queue=True)
2102
old_bus_name = (dbus.service.BusName
2103
("se.bsnet.fukt.Mandos", bus,
2105
except dbus.exceptions.NameExistsException as e:
2106
logger.error(unicode(e) + ", disabling D-Bus")
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)
2107
3191
use_dbus = False
2108
3192
server_settings["use_dbus"] = False
2109
3193
tcp_server.use_dbus = False
2110
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2111
service = AvahiServiceToSyslog(name =
2112
server_settings["servicename"],
2113
servicetype = "_mandos._tcp",
2114
protocol = protocol, bus = bus)
2115
if server_settings["interface"]:
2116
service.interface = (if_nametoindex
2117
(str(server_settings["interface"])))
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"))
2119
3205
global multiprocessing_manager
2120
3206
multiprocessing_manager = multiprocessing.Manager()
2122
3208
client_class = Client
2124
client_class = functools.partial(ClientDBusTransitional,
2127
special_settings = {
2128
# Some settings need to be accessd by special methods;
2129
# booleans need .getboolean(), etc. Here is a list of them:
2130
"approved_by_default":
2132
client_config.getboolean(section, "approved_by_default"),
2134
# Construct a new dict of client settings of this form:
2135
# { client_name: {setting_name: value, ...}, ...}
2136
# with exceptions for any special settings as defined above
2137
client_settings = dict((clientname,
2140
setting not in special_settings
2141
else special_settings[setting]
2144
in client_config.items(clientname)))
2145
for clientname in client_config.sections())
3210
client_class = functools.partial(ClientDBus, bus=bus)
3212
client_settings = Client.config_parser(client_config)
2147
3213
old_client_settings = {}
2150
# Get client data and settings from last running state.
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.
2151
3225
if server_settings["restore"]:
2153
3227
with open(stored_state_path, "rb") as stored_state:
2154
clients_data, old_client_settings = (
2155
pickle.load(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]
2156
3278
os.remove(stored_state_path)
2157
3279
except IOError as e:
2158
logger.warning("Could not load persistant state: {0}"
2160
if e.errno != errno.ENOENT:
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:",
2163
for client in clients_data:
2164
client_name = client["name"]
2166
# Decide which value to use after restoring saved state.
2167
# We have three different values: Old config file,
2168
# new config file, and saved state.
2169
# New config value takes precedence if it differs from old
2170
# config value, otherwise use saved state.
2171
for name, value in client_settings[client_name].items():
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(
2173
# For each value in new config, check if it differs
2174
# from the old config value (Except for the "secret"
2176
if (name != "secret" and
2177
value != old_client_settings[client_name][name]):
2178
setattr(client, name, value)
2182
# Clients who has passed its expire date, can still be enabled
2183
# if its last checker was sucessful. Clients who checkers
2184
# failed before we stored it state is asumed to had failed
2185
# checker during downtime.
2186
if client["enabled"] and client["last_checked_ok"]:
2187
if ((datetime.datetime.utcnow()
2188
- client["last_checked_ok"]) > client["interval"]):
2189
if client["last_checker_status"] != 0:
2190
client["enabled"] = False
2192
client["expires"] = (datetime.datetime.utcnow()
2193
+ client["timeout"])
2195
client["changedstate"] = (multiprocessing_manager
2196
.Condition(multiprocessing_manager
2199
new_client = ClientDBusTransitional.__new__(
2200
ClientDBusTransitional)
2201
tcp_server.clients[client_name] = new_client
2202
new_client.bus = bus
2203
for name, value in client.iteritems():
2204
setattr(new_client, name, value)
2205
new_client._approvals_pending = 0
2206
new_client.add_to_dbus()
2208
tcp_server.clients[client_name] = Client.__new__(Client)
2209
for name, value in client.iteritems():
2210
setattr(tcp_server.clients[client_name], name, value)
2212
tcp_server.clients[client_name].decrypt_secret(
2213
client_settings[client_name]["secret"])
2215
# Create/remove clients based on new changes made to config
2216
for clientname in set(old_client_settings) - set(client_settings):
2217
del tcp_server.clients[clientname]
2218
for clientname in set(client_settings) - set(old_client_settings):
2219
tcp_server.clients[clientname] = client_class(name
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)
2225
3369
if not tcp_server.clients:
2226
3370
logger.warning("No clients defined")
2232
pidfile.write(str(pid) + "\n".encode("utf-8"))
2235
logger.error("Could not write to file %r with PID %d",
2238
# "pidfile" was never created
3373
if pidfile is not None:
3377
print(pid, file=pidfile)
3379
logger.error("Could not write to file %r with PID %d",
2240
3382
del pidfilename
2242
signal.signal(signal.SIGINT, signal.SIG_IGN)
2244
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2245
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3384
for termsig in (signal.SIGHUP, signal.SIGTERM):
3385
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3386
lambda: main_loop.quit() and False)
2248
class MandosDBusService(dbus.service.Object):
3390
@alternate_dbus_interfaces(
3391
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3392
class MandosDBusService(DBusObjectWithObjectManager):
2249
3393
"""A D-Bus proxy object"""
2250
3395
def __init__(self):
2251
3396
dbus.service.Object.__init__(self, bus, "/")
2252
3398
_interface = "se.recompile.Mandos"
2254
3400
@dbus.service.signal(_interface, signature="o")
2255
3401
def ClientAdded(self, objpath):
2259
3405
@dbus.service.signal(_interface, signature="ss")
2260
def ClientNotFound(self, fingerprint, address):
3406
def ClientNotFound(self, key_id, address):
3410
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2264
3412
@dbus.service.signal(_interface, signature="os")
2265
3413
def ClientRemoved(self, objpath, name):
3417
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2269
3419
@dbus.service.method(_interface, out_signature="ao")
2270
3420
def GetAllClients(self):
2272
return dbus.Array(c.dbus_object_path
2274
tcp_server.clients.itervalues())
3422
return dbus.Array(c.dbus_object_path for c in
3423
tcp_server.clients.values())
3425
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2276
3427
@dbus.service.method(_interface,
2277
3428
out_signature="a{oa{sv}}")
2278
3429
def GetAllClientsWithProperties(self):
2280
3431
return dbus.Dictionary(
2281
((c.dbus_object_path, c.GetAll(""))
2282
for c in tcp_server.clients.itervalues()),
3432
{c.dbus_object_path: c.GetAll(
3433
"se.recompile.Mandos.Client")
3434
for c in tcp_server.clients.values()},
2283
3435
signature="oa{sv}")
2285
3437
@dbus.service.method(_interface, in_signature="o")
2286
3438
def RemoveClient(self, object_path):
2288
for c in tcp_server.clients.itervalues():
3440
for c in tcp_server.clients.values():
2289
3441
if c.dbus_object_path == object_path:
2290
3442
del tcp_server.clients[c.name]
2291
3443
c.remove_from_connection()
2292
# Don't signal anything except ClientRemoved
3444
# Don't signal the disabling
2293
3445
c.disable(quiet=True)
2295
self.ClientRemoved(object_path, c.name)
3446
# Emit D-Bus signal for removal
3447
self.client_removed_signal(c)
2297
3449
raise KeyError(object_path)
2301
class MandosDBusServiceTransitional(MandosDBusService):
2302
__metaclass__ = AlternateDBusNamesMetaclass
2303
mandos_dbus_service = MandosDBusServiceTransitional()
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
2306
3497
"Cleanup function; run on exit"
2309
multiprocessing.active_children()
3501
mp.active_children()
2310
3503
if not (tcp_server.clients or client_settings):
2313
3506
# Store client before exiting. Secrets are encrypted with key
2314
3507
# based on what config file has. If config file is
2315
3508
# removed/edited, old secret will thus be unrecovable.
2317
for client in tcp_server.clients.itervalues():
2318
client.encrypt_secret(
2319
client_settings[client.name]["secret"])
2323
# A list of attributes that will not be stored when
2325
exclude = set(("bus", "changedstate", "secret"))
2326
for name, typ in inspect.getmembers(dbus.service.Object):
2329
client_dict["encrypted_secret"] = client.encrypted_secret
2330
for attr in client.client_structure:
2331
if attr not in exclude:
2332
client_dict[attr] = getattr(client, attr)
2334
clients.append(client_dict)
2335
del client_settings[client.name]["secret"]
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"]
2338
with os.fdopen(os.open(stored_state_path,
2339
os.O_CREAT|os.O_WRONLY|os.O_TRUNC,
2340
stat.S_IRUSR | stat.S_IWUSR),
2341
"wb") as stored_state:
2342
pickle.dump((clients, client_settings), stored_state)
2343
except IOError as e:
2344
logger.warning("Could not save persistant state: {0}"
2346
if e.errno != errno.ENOENT:
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:",
2349
3559
# Delete all clients, and settings from config