70
import cPickle as pickle
63
import cPickle as pickle
73
64
import multiprocessing
84
68
import dbus.service
86
from gi.repository import GLib
87
71
from dbus.mainloop.glib import DBusGMainLoop
90
74
import xml.dom.minidom
93
if sys.version_info.major == 2:
97
# Add collections.abc.Callable if it does not exist
99
collections.abc.Callable
100
except AttributeError:
102
Callable = collections.Callable
103
collections.abc = abc
106
# Show warnings by default
107
if not sys.warnoptions:
109
warnings.simplefilter("default")
111
# Try to find the value of SO_BINDTODEVICE:
113
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
114
# newer, and it is also the most natural place for it:
115
78
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
116
79
except AttributeError:
118
# This is where SO_BINDTODEVICE was up to and including Python
120
81
from IN import SO_BINDTODEVICE
121
82
except ImportError:
122
# In Python 2.7 it seems to have been removed entirely.
123
# Try running the C preprocessor:
125
cc = subprocess.Popen(["cc", "--language=c", "-E",
127
stdin=subprocess.PIPE,
128
stdout=subprocess.PIPE)
129
stdout = cc.communicate(
130
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
131
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
132
except (OSError, ValueError, IndexError):
134
SO_BINDTODEVICE = None
136
if sys.version_info < (3, 2):
137
configparser.Configparser = configparser.SafeConfigParser
140
stored_state_file = "clients.pickle"
142
logger = logging.getLogger()
143
logging.captureWarnings(True) # Show warnings via the logging system
147
if_nametoindex = ctypes.cdll.LoadLibrary(
148
ctypes.util.find_library("c")).if_nametoindex
149
except (OSError, AttributeError):
151
def if_nametoindex(interface):
152
"Get an interface index the hard way, i.e. using fcntl()"
153
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
154
with contextlib.closing(socket.socket()) as s:
155
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
156
struct.pack(b"16s16x", interface))
157
interface_index = struct.unpack("I", ifreq[16:20])[0]
158
return interface_index
161
def copy_function(func):
162
"""Make a copy of a function"""
163
if sys.version_info.major == 2:
164
return types.FunctionType(func.func_code,
170
return types.FunctionType(func.__code__,
177
def initlogger(debug, level=logging.WARNING):
178
"""init logger and add loglevel"""
181
syslogger = (logging.handlers.SysLogHandler(
182
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
184
syslogger.setFormatter(logging.Formatter
185
('Mandos [%(process)d]: %(levelname)s:'
187
logger.addHandler(syslogger)
190
console = logging.StreamHandler()
191
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
195
logger.addHandler(console)
196
logger.setLevel(level)
199
class PGPError(Exception):
200
"""Exception if encryption/decryption fails"""
205
"""A simple class for OpenPGP symmetric encryption & decryption"""
208
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
211
output = subprocess.check_output(["gpgconf"])
212
for line in output.splitlines():
213
name, text, path = line.split(b":")
218
if e.errno != errno.ENOENT:
220
self.gnupgargs = ['--batch',
221
'--homedir', self.tempdir,
224
# Only GPG version 1 has the --no-use-agent option.
225
if self.gpg == b"gpg" or self.gpg.endswith(b"/gpg"):
226
self.gnupgargs.append("--no-use-agent")
231
def __exit__(self, exc_type, exc_value, traceback):
239
if self.tempdir is not None:
240
# Delete contents of tempdir
241
for root, dirs, files in os.walk(self.tempdir,
243
for filename in files:
244
os.remove(os.path.join(root, filename))
246
os.rmdir(os.path.join(root, dirname))
248
os.rmdir(self.tempdir)
251
def password_encode(self, password):
252
# Passphrase can not be empty and can not contain newlines or
253
# NUL bytes. So we prefix it and hex encode it.
254
encoded = b"mandos" + binascii.hexlify(password)
255
if len(encoded) > 2048:
256
# GnuPG can't handle long passwords, so encode differently
257
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
258
.replace(b"\n", b"\\n")
259
.replace(b"\0", b"\\x00"))
262
def encrypt(self, data, password):
263
passphrase = self.password_encode(password)
264
with tempfile.NamedTemporaryFile(
265
dir=self.tempdir) as passfile:
266
passfile.write(passphrase)
268
proc = subprocess.Popen([self.gpg, '--symmetric',
272
stdin=subprocess.PIPE,
273
stdout=subprocess.PIPE,
274
stderr=subprocess.PIPE)
275
ciphertext, err = proc.communicate(input=data)
276
if proc.returncode != 0:
280
def decrypt(self, data, password):
281
passphrase = self.password_encode(password)
282
with tempfile.NamedTemporaryFile(
283
dir=self.tempdir) as passfile:
284
passfile.write(passphrase)
286
proc = subprocess.Popen([self.gpg, '--decrypt',
290
stdin=subprocess.PIPE,
291
stdout=subprocess.PIPE,
292
stderr=subprocess.PIPE)
293
decrypted_plaintext, err = proc.communicate(input=data)
294
if proc.returncode != 0:
296
return decrypted_plaintext
299
# Pretend that we have an Avahi module
301
"""This isn't so much a class as it is a module-like namespace."""
302
IF_UNSPEC = -1 # avahi-common/address.h
303
PROTO_UNSPEC = -1 # avahi-common/address.h
304
PROTO_INET = 0 # avahi-common/address.h
305
PROTO_INET6 = 1 # avahi-common/address.h
306
DBUS_NAME = "org.freedesktop.Avahi"
307
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
308
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
309
DBUS_PATH_SERVER = "/"
312
def string_array_to_txt_array(t):
313
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
314
for s in t), signature="ay")
315
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
316
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
317
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
318
SERVER_INVALID = 0 # avahi-common/defs.h
319
SERVER_REGISTERING = 1 # avahi-common/defs.h
320
SERVER_RUNNING = 2 # avahi-common/defs.h
321
SERVER_COLLISION = 3 # avahi-common/defs.h
322
SERVER_FAILURE = 4 # avahi-common/defs.h
83
SO_BINDTODEVICE = None
88
#logger = logging.getLogger('mandos')
89
logger = logging.Logger('mandos')
90
syslogger = (logging.handlers.SysLogHandler
91
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
92
address = str("/dev/log")))
93
syslogger.setFormatter(logging.Formatter
94
('Mandos [%(process)d]: %(levelname)s:'
96
logger.addHandler(syslogger)
98
console = logging.StreamHandler()
99
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
102
logger.addHandler(console)
325
104
class AvahiError(Exception):
326
105
def __init__(self, value, *args, **kwargs):
327
106
self.value = value
328
return super(AvahiError, self).__init__(value, *args,
107
super(AvahiError, self).__init__(value, *args, **kwargs)
108
def __unicode__(self):
109
return unicode(repr(self.value))
332
111
class AvahiServiceError(AvahiError):
336
114
class AvahiGroupError(AvahiError):
118
class AvahiService(object):
341
119
"""An Avahi (Zeroconf) service.
344
122
interface: integer; avahi.IF_UNSPEC or an interface index.
345
123
Used to optionally bind to the specified interface.
346
124
name: string; Example: 'Mandos'
347
125
type: string; Example: '_mandos._tcp'.
348
See <https://www.iana.org/assignments/service-names-port-numbers>
126
See <http://www.dns-sd.org/ServiceTypes.html>
349
127
port: integer; what port to announce
350
128
TXT: list of strings; TXT record for the service
351
129
domain: string; Domain to publish on, default to .local if empty.
510
261
follow_name_owner_changes=True),
511
262
avahi.DBUS_INTERFACE_SERVER)
512
263
self.server.connect_to_signal("StateChanged",
513
self.server_state_changed)
264
self.server_state_changed)
514
265
self.server_state_changed(self.server.GetState())
517
class AvahiServiceToSyslog(AvahiService):
518
def rename(self, *args, **kwargs):
519
"""Add the new name to the syslog messages"""
520
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
521
syslogger.setFormatter(logging.Formatter(
522
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
527
# Pretend that we have a GnuTLS module
529
"""This isn't so much a class as it is a module-like namespace."""
531
library = ctypes.util.find_library("gnutls")
533
library = ctypes.util.find_library("gnutls-deb0")
534
_library = ctypes.cdll.LoadLibrary(library)
537
# Unless otherwise indicated, the constants and types below are
538
# all from the gnutls/gnutls.h C header file.
549
E_NO_CERTIFICATE_FOUND = -49
554
KEYID_USE_SHA256 = 1 # gnutls/x509.h
555
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
558
class session_int(ctypes.Structure):
560
session_t = ctypes.POINTER(session_int)
562
class certificate_credentials_st(ctypes.Structure):
564
certificate_credentials_t = ctypes.POINTER(
565
certificate_credentials_st)
566
certificate_type_t = ctypes.c_int
568
class datum_t(ctypes.Structure):
569
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
570
('size', ctypes.c_uint)]
572
class openpgp_crt_int(ctypes.Structure):
574
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
575
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
576
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
577
credentials_type_t = ctypes.c_int
578
transport_ptr_t = ctypes.c_void_p
579
close_request_t = ctypes.c_int
582
class Error(Exception):
583
def __init__(self, message=None, code=None, args=()):
584
# Default usage is by a message string, but if a return
585
# code is passed, convert it to a string with
588
if message is None and code is not None:
589
message = gnutls.strerror(code)
590
return super(gnutls.Error, self).__init__(
593
class CertificateSecurityError(Error):
599
self._c_object = gnutls.certificate_credentials_t()
600
gnutls.certificate_allocate_credentials(
601
ctypes.byref(self._c_object))
602
self.type = gnutls.CRD_CERTIFICATE
605
gnutls.certificate_free_credentials(self._c_object)
608
def __init__(self, socket, credentials=None):
609
self._c_object = gnutls.session_t()
610
gnutls_flags = gnutls.CLIENT
611
if gnutls.check_version(b"3.5.6"):
612
gnutls_flags |= gnutls.NO_TICKETS
614
gnutls_flags |= gnutls.ENABLE_RAWPK
615
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
617
gnutls.set_default_priority(self._c_object)
618
gnutls.transport_set_ptr(self._c_object, socket.fileno())
619
gnutls.handshake_set_private_extensions(self._c_object,
622
if credentials is None:
623
credentials = gnutls.Credentials()
624
gnutls.credentials_set(self._c_object, credentials.type,
625
ctypes.cast(credentials._c_object,
627
self.credentials = credentials
630
gnutls.deinit(self._c_object)
633
return gnutls.handshake(self._c_object)
635
def send(self, data):
639
data_len -= gnutls.record_send(self._c_object,
644
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
646
# Error handling functions
647
def _error_code(result):
648
"""A function to raise exceptions on errors, suitable
649
for the 'restype' attribute on ctypes functions"""
652
if result == gnutls.E_NO_CERTIFICATE_FOUND:
653
raise gnutls.CertificateSecurityError(code=result)
654
raise gnutls.Error(code=result)
656
def _retry_on_error(result, func, arguments):
657
"""A function to retry on some errors, suitable
658
for the 'errcheck' attribute on ctypes functions"""
660
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
661
return _error_code(result)
662
result = func(*arguments)
665
# Unless otherwise indicated, the function declarations below are
666
# all from the gnutls/gnutls.h C header file.
669
priority_set_direct = _library.gnutls_priority_set_direct
670
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
671
ctypes.POINTER(ctypes.c_char_p)]
672
priority_set_direct.restype = _error_code
674
init = _library.gnutls_init
675
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
676
init.restype = _error_code
678
set_default_priority = _library.gnutls_set_default_priority
679
set_default_priority.argtypes = [session_t]
680
set_default_priority.restype = _error_code
682
record_send = _library.gnutls_record_send
683
record_send.argtypes = [session_t, ctypes.c_void_p,
685
record_send.restype = ctypes.c_ssize_t
686
record_send.errcheck = _retry_on_error
688
certificate_allocate_credentials = (
689
_library.gnutls_certificate_allocate_credentials)
690
certificate_allocate_credentials.argtypes = [
691
ctypes.POINTER(certificate_credentials_t)]
692
certificate_allocate_credentials.restype = _error_code
694
certificate_free_credentials = (
695
_library.gnutls_certificate_free_credentials)
696
certificate_free_credentials.argtypes = [
697
certificate_credentials_t]
698
certificate_free_credentials.restype = None
700
handshake_set_private_extensions = (
701
_library.gnutls_handshake_set_private_extensions)
702
handshake_set_private_extensions.argtypes = [session_t,
704
handshake_set_private_extensions.restype = None
706
credentials_set = _library.gnutls_credentials_set
707
credentials_set.argtypes = [session_t, credentials_type_t,
709
credentials_set.restype = _error_code
711
strerror = _library.gnutls_strerror
712
strerror.argtypes = [ctypes.c_int]
713
strerror.restype = ctypes.c_char_p
715
certificate_type_get = _library.gnutls_certificate_type_get
716
certificate_type_get.argtypes = [session_t]
717
certificate_type_get.restype = _error_code
719
certificate_get_peers = _library.gnutls_certificate_get_peers
720
certificate_get_peers.argtypes = [session_t,
721
ctypes.POINTER(ctypes.c_uint)]
722
certificate_get_peers.restype = ctypes.POINTER(datum_t)
724
global_set_log_level = _library.gnutls_global_set_log_level
725
global_set_log_level.argtypes = [ctypes.c_int]
726
global_set_log_level.restype = None
728
global_set_log_function = _library.gnutls_global_set_log_function
729
global_set_log_function.argtypes = [log_func]
730
global_set_log_function.restype = None
732
deinit = _library.gnutls_deinit
733
deinit.argtypes = [session_t]
734
deinit.restype = None
736
handshake = _library.gnutls_handshake
737
handshake.argtypes = [session_t]
738
handshake.restype = _error_code
739
handshake.errcheck = _retry_on_error
741
transport_set_ptr = _library.gnutls_transport_set_ptr
742
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
743
transport_set_ptr.restype = None
745
bye = _library.gnutls_bye
746
bye.argtypes = [session_t, close_request_t]
747
bye.restype = _error_code
748
bye.errcheck = _retry_on_error
750
check_version = _library.gnutls_check_version
751
check_version.argtypes = [ctypes.c_char_p]
752
check_version.restype = ctypes.c_char_p
754
_need_version = b"3.3.0"
755
if check_version(_need_version) is None:
756
raise self.Error("Needs GnuTLS {} or later"
757
.format(_need_version))
759
_tls_rawpk_version = b"3.6.6"
760
has_rawpk = bool(check_version(_tls_rawpk_version))
764
class pubkey_st(ctypes.Structure):
766
pubkey_t = ctypes.POINTER(pubkey_st)
768
x509_crt_fmt_t = ctypes.c_int
770
# All the function declarations below are from gnutls/abstract.h
771
pubkey_init = _library.gnutls_pubkey_init
772
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
773
pubkey_init.restype = _error_code
775
pubkey_import = _library.gnutls_pubkey_import
776
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
778
pubkey_import.restype = _error_code
780
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
781
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
782
ctypes.POINTER(ctypes.c_ubyte),
783
ctypes.POINTER(ctypes.c_size_t)]
784
pubkey_get_key_id.restype = _error_code
786
pubkey_deinit = _library.gnutls_pubkey_deinit
787
pubkey_deinit.argtypes = [pubkey_t]
788
pubkey_deinit.restype = None
790
# All the function declarations below are from gnutls/openpgp.h
792
openpgp_crt_init = _library.gnutls_openpgp_crt_init
793
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
794
openpgp_crt_init.restype = _error_code
796
openpgp_crt_import = _library.gnutls_openpgp_crt_import
797
openpgp_crt_import.argtypes = [openpgp_crt_t,
798
ctypes.POINTER(datum_t),
800
openpgp_crt_import.restype = _error_code
802
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
803
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
804
ctypes.POINTER(ctypes.c_uint)]
805
openpgp_crt_verify_self.restype = _error_code
807
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
808
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
809
openpgp_crt_deinit.restype = None
811
openpgp_crt_get_fingerprint = (
812
_library.gnutls_openpgp_crt_get_fingerprint)
813
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
817
openpgp_crt_get_fingerprint.restype = _error_code
819
if check_version(b"3.6.4"):
820
certificate_type_get2 = _library.gnutls_certificate_type_get2
821
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
822
certificate_type_get2.restype = _error_code
824
# Remove non-public functions
825
del _error_code, _retry_on_error
828
def call_pipe(connection, # : multiprocessing.Connection
829
func, *args, **kwargs):
830
"""This function is meant to be called by multiprocessing.Process
832
This function runs func(*args, **kwargs), and writes the resulting
833
return value on the provided multiprocessing.Connection.
835
connection.send(func(*args, **kwargs))
268
def _timedelta_to_milliseconds(td):
269
"Convert a datetime.timedelta() to milliseconds"
270
return ((td.days * 24 * 60 * 60 * 1000)
271
+ (td.seconds * 1000)
272
+ (td.microseconds // 1000))
274
class Client(object):
840
275
"""A representation of a client host served by this server.
843
approved: bool(); 'None' if not yet approved/disapproved
278
_approved: bool(); 'None' if not yet approved/disapproved
844
279
approval_delay: datetime.timedelta(); Time to wait for approval
845
280
approval_duration: datetime.timedelta(); Duration of one approval
846
checker: multiprocessing.Process(); a running checker process used
847
to see if the client lives. 'None' if no process is
849
checker_callback_tag: a GLib event source tag, or None
281
checker: subprocess.Popen(); a running checker process used
282
to see if the client lives.
283
'None' if no process is running.
284
checker_callback_tag: a gobject event source tag, or None
850
285
checker_command: string; External command which is run to check
851
286
if client lives. %() expansions are done at
852
287
runtime with vars(self) as dict, so that for
853
288
instance %(name)s can be used in the command.
854
checker_initiator_tag: a GLib event source tag, or None
289
checker_initiator_tag: a gobject event source tag, or None
855
290
created: datetime.datetime(); (UTC) object creation
856
client_structure: Object describing what attributes a client has
857
and is used for storing the client at exit
858
291
current_checker_command: string; current running checker_command
859
disable_initiator_tag: a GLib event source tag, or None
292
disable_hook: If set, called by disable() as disable_hook(self)
293
disable_initiator_tag: a gobject event source tag, or None
861
295
fingerprint: string (40 or 32 hexadecimal digits); used to
862
uniquely identify an OpenPGP client
863
key_id: string (64 hexadecimal digits); used to uniquely identify
864
a client using raw public keys
296
uniquely identify the client
865
297
host: string; available for use by the checker command
866
298
interval: datetime.timedelta(); How often to start a new checker
867
299
last_approval_request: datetime.datetime(); (UTC) or None
868
300
last_checked_ok: datetime.datetime(); (UTC) or None
869
last_checker_status: integer between 0 and 255 reflecting exit
870
status of last checker. -1 reflects crashed
871
checker, -2 means no checker completed yet.
872
last_checker_signal: The signal which killed the last checker, if
873
last_checker_status is -1
874
last_enabled: datetime.datetime(); (UTC) or None
301
last_enabled: datetime.datetime(); (UTC)
875
302
name: string; from the config file, used in log messages and
876
303
D-Bus identifiers
877
304
secret: bytestring; sent verbatim (over TLS) to client
878
305
timeout: datetime.timedelta(); How long from last_checked_ok
879
306
until this client is disabled
880
extended_timeout: extra long timeout when secret has been sent
307
extended_timeout: extra long timeout when password has been sent
881
308
runtime_expansions: Allowed attributes for runtime expansion.
882
309
expires: datetime.datetime(); time (UTC) when a client will be
883
310
disabled, or None
884
server_settings: The server_settings dict from main()
887
313
runtime_expansions = ("approval_delay", "approval_duration",
888
"created", "enabled", "expires", "key_id",
889
"fingerprint", "host", "interval",
890
"last_approval_request", "last_checked_ok",
314
"created", "enabled", "fingerprint",
315
"host", "interval", "last_checked_ok",
891
316
"last_enabled", "name", "timeout")
894
"extended_timeout": "PT15M",
896
"checker": "fping -q -- %%(host)s",
898
"approval_delay": "PT0S",
899
"approval_duration": "PT1S",
900
"approved_by_default": "True",
905
def config_parser(config):
906
"""Construct a new dict of client settings of this form:
907
{ client_name: {setting_name: value, ...}, ...}
908
with exceptions for any special settings as defined above.
909
NOTE: Must be a pure function. Must return the same result
910
value given the same arguments.
913
for client_name in config.sections():
914
section = dict(config.items(client_name))
915
client = settings[client_name] = {}
917
client["host"] = section["host"]
918
# Reformat values from string types to Python types
919
client["approved_by_default"] = config.getboolean(
920
client_name, "approved_by_default")
921
client["enabled"] = config.getboolean(client_name,
924
# Uppercase and remove spaces from key_id and fingerprint
925
# for later comparison purposes with return value from the
926
# key_id() and fingerprint() functions
927
client["key_id"] = (section.get("key_id", "").upper()
929
client["fingerprint"] = (section["fingerprint"].upper()
931
if "secret" in section:
932
client["secret"] = codecs.decode(section["secret"]
935
elif "secfile" in section:
936
with open(os.path.expanduser(os.path.expandvars
937
(section["secfile"])),
939
client["secret"] = secfile.read()
941
raise TypeError("No secret or secfile for section {}"
943
client["timeout"] = string_to_delta(section["timeout"])
944
client["extended_timeout"] = string_to_delta(
945
section["extended_timeout"])
946
client["interval"] = string_to_delta(section["interval"])
947
client["approval_delay"] = string_to_delta(
948
section["approval_delay"])
949
client["approval_duration"] = string_to_delta(
950
section["approval_duration"])
951
client["checker_command"] = section["checker"]
952
client["last_approval_request"] = None
953
client["last_checked_ok"] = None
954
client["last_checker_status"] = -2
958
def __init__(self, settings, name=None, server_settings=None):
318
def timeout_milliseconds(self):
319
"Return the 'timeout' attribute in milliseconds"
320
return _timedelta_to_milliseconds(self.timeout)
322
def extended_timeout_milliseconds(self):
323
"Return the 'extended_timeout' attribute in milliseconds"
324
return _timedelta_to_milliseconds(self.extended_timeout)
326
def interval_milliseconds(self):
327
"Return the 'interval' attribute in milliseconds"
328
return _timedelta_to_milliseconds(self.interval)
330
def approval_delay_milliseconds(self):
331
return _timedelta_to_milliseconds(self.approval_delay)
333
def __init__(self, name = None, disable_hook=None, config=None):
334
"""Note: the 'checker' key in 'config' sets the
335
'checker_command' attribute and *not* the 'checker'
960
if server_settings is None:
962
self.server_settings = server_settings
963
# adding all client settings
964
for setting, value in settings.items():
965
setattr(self, setting, value)
968
if not hasattr(self, "last_enabled"):
969
self.last_enabled = datetime.datetime.utcnow()
970
if not hasattr(self, "expires"):
971
self.expires = (datetime.datetime.utcnow()
974
self.last_enabled = None
977
340
logger.debug("Creating client %r", self.name)
978
logger.debug(" Key ID: %s", self.key_id)
341
# Uppercase and remove spaces from fingerprint for later
342
# comparison purposes with return value from the fingerprint()
344
self.fingerprint = (config["fingerprint"].upper()
979
346
logger.debug(" Fingerprint: %s", self.fingerprint)
980
self.created = settings.get("created",
981
datetime.datetime.utcnow())
983
# attributes specific for this server instance
347
if "secret" in config:
348
self.secret = config["secret"].decode("base64")
349
elif "secfile" in config:
350
with open(os.path.expanduser(os.path.expandvars
351
(config["secfile"])),
353
self.secret = secfile.read()
355
raise TypeError("No secret or secfile for client %s"
357
self.host = config.get("host", "")
358
self.created = datetime.datetime.utcnow()
360
self.last_approval_request = None
361
self.last_enabled = None
362
self.last_checked_ok = None
363
self.timeout = string_to_delta(config["timeout"])
364
self.extended_timeout = string_to_delta(config["extended_timeout"])
365
self.interval = string_to_delta(config["interval"])
366
self.disable_hook = disable_hook
984
367
self.checker = None
985
368
self.checker_initiator_tag = None
986
369
self.disable_initiator_tag = None
987
371
self.checker_callback_tag = None
372
self.checker_command = config["checker"]
988
373
self.current_checker_command = None
374
self.last_connect = None
375
self._approved = None
376
self.approved_by_default = config.get("approved_by_default",
990
378
self.approvals_pending = 0
991
self.changedstate = multiprocessing_manager.Condition(
992
multiprocessing_manager.Lock())
993
self.client_structure = [attr
994
for attr in self.__dict__.keys()
995
if not attr.startswith("_")]
996
self.client_structure.append("client_structure")
998
for name, t in inspect.getmembers(
999
type(self), lambda obj: isinstance(obj, property)):
1000
if not name.startswith("_"):
1001
self.client_structure.append(name)
1003
# Send notice to process children that client state has changed
379
self.approval_delay = string_to_delta(
380
config["approval_delay"])
381
self.approval_duration = string_to_delta(
382
config["approval_duration"])
383
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
1004
385
def send_changedstate(self):
1005
with self.changedstate:
1006
self.changedstate.notify_all()
386
self.changedstate.acquire()
387
self.changedstate.notify_all()
388
self.changedstate.release()
1008
390
def enable(self):
1009
391
"""Start this client's checker and timeout hooks"""
1010
392
if getattr(self, "enabled", False):
1011
393
# Already enabled
395
self.send_changedstate()
396
# Schedule a new checker to be started an 'interval' from now,
397
# and every interval from then on.
398
self.checker_initiator_tag = (gobject.timeout_add
399
(self.interval_milliseconds(),
401
# Schedule a disable() when 'timeout' has passed
1013
402
self.expires = datetime.datetime.utcnow() + self.timeout
403
self.disable_initiator_tag = (gobject.timeout_add
404
(self.timeout_milliseconds(),
1014
406
self.enabled = True
1015
407
self.last_enabled = datetime.datetime.utcnow()
1017
self.send_changedstate()
408
# Also start a new checker *right now*.
1019
411
def disable(self, quiet=True):
1020
412
"""Disable this client."""
1021
413
if not getattr(self, "enabled", False):
416
self.send_changedstate()
1024
418
logger.info("Disabling client %s", self.name)
1025
if getattr(self, "disable_initiator_tag", None) is not None:
1026
GLib.source_remove(self.disable_initiator_tag)
419
if getattr(self, "disable_initiator_tag", False):
420
gobject.source_remove(self.disable_initiator_tag)
1027
421
self.disable_initiator_tag = None
1028
422
self.expires = None
1029
if getattr(self, "checker_initiator_tag", None) is not None:
1030
GLib.source_remove(self.checker_initiator_tag)
423
if getattr(self, "checker_initiator_tag", False):
424
gobject.source_remove(self.checker_initiator_tag)
1031
425
self.checker_initiator_tag = None
1032
426
self.stop_checker()
427
if self.disable_hook:
428
self.disable_hook(self)
1033
429
self.enabled = False
1035
self.send_changedstate()
1036
# Do not run this again if called by a GLib.timeout_add
430
# Do not run this again if called by a gobject.timeout_add
1039
433
def __del__(self):
434
self.disable_hook = None
1042
def init_checker(self):
1043
# Schedule a new checker to be started an 'interval' from now,
1044
# and every interval from then on.
1045
if self.checker_initiator_tag is not None:
1046
GLib.source_remove(self.checker_initiator_tag)
1047
self.checker_initiator_tag = GLib.timeout_add(
1048
random.randrange(int(self.interval.total_seconds() * 1000
1051
# Schedule a disable() when 'timeout' has passed
1052
if self.disable_initiator_tag is not None:
1053
GLib.source_remove(self.disable_initiator_tag)
1054
self.disable_initiator_tag = GLib.timeout_add(
1055
int(self.timeout.total_seconds() * 1000), self.disable)
1056
# Also start a new checker *right now*.
1057
self.start_checker()
1059
def checker_callback(self, source, condition, connection,
437
def checker_callback(self, pid, condition, command):
1061
438
"""The checker has completed, so take appropriate actions."""
1062
# Read return code from connection (see call_pipe)
1063
returncode = connection.recv()
1065
if self.checker is not None:
1067
439
self.checker_callback_tag = None
1068
440
self.checker = None
1071
self.last_checker_status = returncode
1072
self.last_checker_signal = None
1073
if self.last_checker_status == 0:
441
if os.WIFEXITED(condition):
442
exitstatus = os.WEXITSTATUS(condition)
1074
444
logger.info("Checker for %(name)s succeeded",
1076
446
self.checked_ok()
1078
logger.info("Checker for %(name)s failed", vars(self))
448
logger.info("Checker for %(name)s failed",
1080
self.last_checker_status = -1
1081
self.last_checker_signal = -returncode
1082
451
logger.warning("Checker for %(name)s crashed?",
1086
def checked_ok(self):
1087
"""Assert that the client has been seen, alive and well."""
1088
self.last_checked_ok = datetime.datetime.utcnow()
1089
self.last_checker_status = 0
1090
self.last_checker_signal = None
1093
def bump_timeout(self, timeout=None):
1094
"""Bump up the timeout for this client."""
454
def checked_ok(self, timeout=None):
455
"""Bump up the timeout for this client.
457
This should only be called when the client has been seen,
1095
460
if timeout is None:
1096
461
timeout = self.timeout
1097
if self.disable_initiator_tag is not None:
1098
GLib.source_remove(self.disable_initiator_tag)
1099
self.disable_initiator_tag = None
1100
if getattr(self, "enabled", False):
1101
self.disable_initiator_tag = GLib.timeout_add(
1102
int(timeout.total_seconds() * 1000), self.disable)
1103
self.expires = datetime.datetime.utcnow() + timeout
462
self.last_checked_ok = datetime.datetime.utcnow()
463
gobject.source_remove(self.disable_initiator_tag)
464
self.expires = datetime.datetime.utcnow() + timeout
465
self.disable_initiator_tag = (gobject.timeout_add
466
(_timedelta_to_milliseconds(timeout),
1105
469
def need_approval(self):
1106
470
self.last_approval_request = datetime.datetime.utcnow()
1108
472
def start_checker(self):
1109
473
"""Start a new checker subprocess if one is not running.
1111
475
If a checker already exists, leave it running and do
1113
477
# The reason for not killing a running checker is that if we
1114
# did that, and if a checker (for some reason) started running
1115
# slowly and taking more than 'interval' time, then the client
1116
# would inevitably timeout, since no checker would get a
1117
# chance to run to completion. If we instead leave running
478
# did that, then if a checker (for some reason) started
479
# running slowly and taking more than 'interval' time, the
480
# client would inevitably timeout, since no checker would get
481
# a chance to run to completion. If we instead leave running
1118
482
# checkers alone, the checker would have to take more time
1119
483
# than 'timeout' for the client to be disabled, which is as it
1122
if self.checker is not None and not self.checker.is_alive():
1123
logger.warning("Checker was not alive; joining")
486
# If a checker exists, make sure it is not a zombie
488
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
489
except (AttributeError, OSError) as error:
490
if (isinstance(error, OSError)
491
and error.errno != errno.ECHILD):
495
logger.warning("Checker was a zombie")
496
gobject.source_remove(self.checker_callback_tag)
497
self.checker_callback(pid, status,
498
self.current_checker_command)
1126
499
# Start a new checker if needed
1127
500
if self.checker is None:
1128
# Escape attributes for the shell
1130
attr: re.escape(str(getattr(self, attr)))
1131
for attr in self.runtime_expansions}
1133
command = self.checker_command % escaped_attrs
1134
except TypeError as error:
1135
logger.error('Could not format string "%s"',
1136
self.checker_command,
1138
return True # Try again later
502
# In case checker_command has exactly one % operator
503
command = self.checker_command % self.host
505
# Escape attributes for the shell
506
escaped_attrs = dict(
508
re.escape(unicode(str(getattr(self, attr, "")),
512
self.runtime_expansions)
515
command = self.checker_command % escaped_attrs
516
except TypeError as error:
517
logger.error('Could not format string "%s":'
518
' %s', self.checker_command, error)
519
return True # Try again later
1139
520
self.current_checker_command = command
1140
logger.info("Starting checker %r for %s", command,
1142
# We don't need to redirect stdout and stderr, since
1143
# in normal mode, that is already done by daemon(),
1144
# and in debug mode we don't want to. (Stdin is
1145
# always replaced by /dev/null.)
1146
# The exception is when not debugging but nevertheless
1147
# running in the foreground; use the previously
1149
popen_args = {"close_fds": True,
1152
if (not self.server_settings["debug"]
1153
and self.server_settings["foreground"]):
1154
popen_args.update({"stdout": wnull,
1156
pipe = multiprocessing.Pipe(duplex=False)
1157
self.checker = multiprocessing.Process(
1159
args=(pipe[1], subprocess.call, command),
1161
self.checker.start()
1162
self.checker_callback_tag = GLib.io_add_watch(
1163
GLib.IOChannel.unix_new(pipe[0].fileno()),
1164
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
1165
self.checker_callback, pipe[0], command)
1166
# Re-run this periodically if run by GLib.timeout_add
522
logger.info("Starting checker %r for %s",
524
# We don't need to redirect stdout and stderr, since
525
# in normal mode, that is already done by daemon(),
526
# and in debug mode we don't want to. (Stdin is
527
# always replaced by /dev/null.)
528
self.checker = subprocess.Popen(command,
531
self.checker_callback_tag = (gobject.child_watch_add
533
self.checker_callback,
535
# The checker may have completed before the gobject
536
# watch was added. Check for this.
537
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
539
gobject.source_remove(self.checker_callback_tag)
540
self.checker_callback(pid, status, command)
541
except OSError as error:
542
logger.error("Failed to start subprocess: %s",
544
# Re-run this periodically if run by gobject.timeout_add
1169
547
def stop_checker(self):
1170
548
"""Force the checker process, if any, to stop."""
1171
549
if self.checker_callback_tag:
1172
GLib.source_remove(self.checker_callback_tag)
550
gobject.source_remove(self.checker_callback_tag)
1173
551
self.checker_callback_tag = None
1174
552
if getattr(self, "checker", None) is None:
1176
554
logger.debug("Stopping checker for %(name)s", vars(self))
1177
self.checker.terminate()
556
os.kill(self.checker.pid, signal.SIGTERM)
558
#if self.checker.poll() is None:
559
# os.kill(self.checker.pid, signal.SIGKILL)
560
except OSError as error:
561
if error.errno != errno.ESRCH: # No such process
1178
563
self.checker = None
1181
def dbus_service_property(dbus_interface,
566
def dbus_service_property(dbus_interface, signature="v",
567
access="readwrite", byte_arrays=False):
1185
568
"""Decorators for marking methods of a DBusObjectWithProperties to
1186
569
become properties on the D-Bus.
1188
571
The decorated method will be called with no arguments by "Get"
1189
572
and with one argument by "Set".
1191
574
The parameters, where they are supported, are the same as
1192
575
dbus.service.method, except there is only "signature", since the
1193
576
type from Get() and the type sent to Set() is the same.
1525
743
except (AttributeError, xml.dom.DOMException,
1526
744
xml.parsers.expat.ExpatError) as error:
1527
745
logger.error("Failed to override Introspection method",
1533
dbus.OBJECT_MANAGER_IFACE
1534
except AttributeError:
1535
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1538
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1539
"""A D-Bus object with an ObjectManager.
1541
Classes inheriting from this exposes the standard
1542
GetManagedObjects call and the InterfacesAdded and
1543
InterfacesRemoved signals on the standard
1544
"org.freedesktop.DBus.ObjectManager" interface.
1546
Note: No signals are sent automatically; they must be sent
1549
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1550
out_signature="a{oa{sa{sv}}}")
1551
def GetManagedObjects(self):
1552
"""This function must be overridden"""
1553
raise NotImplementedError()
1555
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1556
signature="oa{sa{sv}}")
1557
def InterfacesAdded(self, object_path, interfaces_and_properties):
1560
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1561
def InterfacesRemoved(self, object_path, interfaces):
1564
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1566
path_keyword='object_path',
1567
connection_keyword='connection')
1568
def Introspect(self, object_path, connection):
1569
"""Overloading of standard D-Bus method.
1571
Override return argument name of GetManagedObjects to be
1572
"objpath_interfaces_and_properties"
1574
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1578
document = xml.dom.minidom.parseString(xmlstring)
1580
for if_tag in document.getElementsByTagName("interface"):
1581
# Fix argument name for the GetManagedObjects method
1582
if (if_tag.getAttribute("name")
1583
== dbus.OBJECT_MANAGER_IFACE):
1584
for cn in if_tag.getElementsByTagName("method"):
1585
if (cn.getAttribute("name")
1586
== "GetManagedObjects"):
1587
for arg in cn.getElementsByTagName("arg"):
1588
if (arg.getAttribute("direction")
1592
"objpath_interfaces"
1594
xmlstring = document.toxml("utf-8")
1596
except (AttributeError, xml.dom.DOMException,
1597
xml.parsers.expat.ExpatError) as error:
1598
logger.error("Failed to override Introspection method",
1603
def datetime_to_dbus(dt, variant_level=0):
750
def datetime_to_dbus (dt, variant_level=0):
1604
751
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1606
return dbus.String("", variant_level=variant_level)
1607
return dbus.String(dt.isoformat(), variant_level=variant_level)
1610
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1611
"""A class decorator; applied to a subclass of
1612
dbus.service.Object, it will add alternate D-Bus attributes with
1613
interface names according to the "alt_interface_names" mapping.
1616
@alternate_dbus_interfaces({"org.example.Interface":
1617
"net.example.AlternateInterface"})
1618
class SampleDBusObject(dbus.service.Object):
1619
@dbus.service.method("org.example.Interface")
1620
def SampleDBusMethod():
1623
The above "SampleDBusMethod" on "SampleDBusObject" will be
1624
reachable via two interfaces: "org.example.Interface" and
1625
"net.example.AlternateInterface", the latter of which will have
1626
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1627
"true", unless "deprecate" is passed with a False value.
1629
This works for methods and signals, and also for D-Bus properties
1630
(from DBusObjectWithProperties) and interfaces (from the
1631
dbus_interface_annotations decorator).
753
return dbus.String("", variant_level = variant_level)
754
return dbus.String(dt.isoformat(),
755
variant_level=variant_level)
757
class AlternateDBusNamesMetaclass(DBusObjectWithProperties.__metaclass__):
758
"""Applied to an empty subclass of a D-Bus object, this metaclass
759
will add additional D-Bus attributes matching a certain pattern.
1635
for orig_interface_name, alt_interface_name in (
1636
alt_interface_names.items()):
1638
interface_names = set()
1639
# Go though all attributes of the class
1640
for attrname, attribute in inspect.getmembers(cls):
761
def __new__(mcs, name, bases, attr):
762
# Go through all the base classes which could have D-Bus
763
# methods, signals, or properties in them
764
for base in (b for b in bases
765
if issubclass(b, dbus.service.Object)):
766
# Go though all attributes of the base class
767
for attrname, attribute in inspect.getmembers(base):
1641
768
# Ignore non-D-Bus attributes, and D-Bus attributes
1642
769
# with the wrong interface name
1643
770
if (not hasattr(attribute, "_dbus_interface")
1644
or not attribute._dbus_interface.startswith(
1645
orig_interface_name)):
771
or not attribute._dbus_interface
772
.startswith("se.recompile.Mandos")):
1647
774
# Create an alternate D-Bus interface name based on
1648
775
# the current name
1649
alt_interface = attribute._dbus_interface.replace(
1650
orig_interface_name, alt_interface_name)
1651
interface_names.add(alt_interface)
776
alt_interface = (attribute._dbus_interface
777
.replace("se.recompile.Mandos",
778
"se.bsnet.fukt.Mandos"))
1652
779
# Is this a D-Bus signal?
1653
780
if getattr(attribute, "_dbus_is_signal", False):
1654
# Extract the original non-method undecorated
1655
# function by black magic
1656
if sys.version_info.major == 2:
1657
nonmethod_func = (dict(
781
# Extract the original non-method function by
783
nonmethod_func = (dict(
1658
784
zip(attribute.func_code.co_freevars,
1659
attribute.__closure__))
1660
["func"].cell_contents)
1662
nonmethod_func = (dict(
1663
zip(attribute.__code__.co_freevars,
1664
attribute.__closure__))
1665
["func"].cell_contents)
785
attribute.__closure__))["func"]
1666
787
# Create a new, but exactly alike, function
1667
788
# object, and decorate it to be a new D-Bus signal
1668
789
# with the alternate D-Bus interface name
1669
new_function = copy_function(nonmethod_func)
1670
new_function = (dbus.service.signal(
1672
attribute._dbus_signature)(new_function))
1673
# Copy annotations, if any
1675
new_function._dbus_annotations = dict(
1676
attribute._dbus_annotations)
1677
except AttributeError:
790
new_function = (dbus.service.signal
792
attribute._dbus_signature)
794
nonmethod_func.func_code,
795
nonmethod_func.func_globals,
796
nonmethod_func.func_name,
797
nonmethod_func.func_defaults,
798
nonmethod_func.func_closure)))
1680
799
# Define a creator of a function to call both the
1681
# original and alternate functions, so both the
1682
# original and alternate signals gets sent when
1683
# the function is called
800
# old and new functions, so both the old and new
801
# signals gets sent when the function is called
1684
802
def fixscope(func1, func2):
1685
803
"""This function is a scope container to pass
1686
804
func1 and func2 to the "call_both" function
1687
805
outside of its arguments"""
1689
@functools.wraps(func2)
1690
806
def call_both(*args, **kwargs):
1691
807
"""This function will emit two D-Bus
1692
808
signals by calling func1 and func2"""
1693
809
func1(*args, **kwargs)
1694
810
func2(*args, **kwargs)
1695
# Make wrapper function look like a D-Bus
1697
for name, attr in inspect.getmembers(func2):
1698
if name.startswith("_dbus_"):
1699
setattr(call_both, name, attr)
1701
811
return call_both
1702
812
# Create the "call_both" function and add it to
1704
attr[attrname] = fixscope(attribute, new_function)
814
attr[attrname] = fixscope(attribute,
1705
816
# Is this a D-Bus method?
1706
817
elif getattr(attribute, "_dbus_is_method", False):
1707
818
# Create a new, but exactly alike, function
1708
819
# object. Decorate it to be a new D-Bus method
1709
820
# with the alternate D-Bus interface name. Add it
1712
dbus.service.method(
1714
attribute._dbus_in_signature,
1715
attribute._dbus_out_signature)
1716
(copy_function(attribute)))
1717
# Copy annotations, if any
1719
attr[attrname]._dbus_annotations = dict(
1720
attribute._dbus_annotations)
1721
except AttributeError:
822
attr[attrname] = (dbus.service.method
824
attribute._dbus_in_signature,
825
attribute._dbus_out_signature)
827
(attribute.func_code,
828
attribute.func_globals,
830
attribute.func_defaults,
831
attribute.func_closure)))
1723
832
# Is this a D-Bus property?
1724
833
elif getattr(attribute, "_dbus_is_property", False):
1725
834
# Create a new, but exactly alike, function
1726
835
# object, and decorate it to be a new D-Bus
1727
836
# property with the alternate D-Bus interface
1728
837
# name. Add it to the class.
1729
attr[attrname] = (dbus_service_property(
1730
alt_interface, attribute._dbus_signature,
1731
attribute._dbus_access,
1732
attribute._dbus_get_args_options
1734
(copy_function(attribute)))
1735
# Copy annotations, if any
1737
attr[attrname]._dbus_annotations = dict(
1738
attribute._dbus_annotations)
1739
except AttributeError:
1741
# Is this a D-Bus interface?
1742
elif getattr(attribute, "_dbus_is_interface", False):
1743
# Create a new, but exactly alike, function
1744
# object. Decorate it to be a new D-Bus interface
1745
# with the alternate D-Bus interface name. Add it
1748
dbus_interface_annotations(alt_interface)
1749
(copy_function(attribute)))
1751
# Deprecate all alternate interfaces
1752
iname = "_AlternateDBusNames_interface_annotation{}"
1753
for interface_name in interface_names:
1755
@dbus_interface_annotations(interface_name)
1757
return {"org.freedesktop.DBus.Deprecated":
1759
# Find an unused name
1760
for aname in (iname.format(i)
1761
for i in itertools.count()):
1762
if aname not in attr:
1766
# Replace the class with a new subclass of it with
1767
# methods, signals, etc. as created above.
1768
if sys.version_info.major == 2:
1769
cls = type(b"{}Alternate".format(cls.__name__),
1772
cls = type("{}Alternate".format(cls.__name__),
1779
@alternate_dbus_interfaces({"se.recompile.Mandos":
1780
"se.bsnet.fukt.Mandos"})
838
attr[attrname] = (dbus_service_property
840
attribute._dbus_signature,
841
attribute._dbus_access,
843
._dbus_get_args_options
846
(attribute.func_code,
847
attribute.func_globals,
849
attribute.func_defaults,
850
attribute.func_closure)))
851
return type.__new__(mcs, name, bases, attr)
1781
853
class ClientDBus(Client, DBusObjectWithProperties):
1782
854
"""A Client class using D-Bus
1785
857
dbus_object_path: dbus.ObjectPath
1786
858
bus: dbus.SystemBus()
1789
861
runtime_expansions = (Client.runtime_expansions
1790
+ ("dbus_object_path", ))
1792
_interface = "se.recompile.Mandos.Client"
862
+ ("dbus_object_path",))
1794
864
# dbus.service.Object doesn't use super(), so we can't either.
1796
def __init__(self, bus=None, *args, **kwargs):
866
def __init__(self, bus = None, *args, **kwargs):
867
self._approvals_pending = 0
1798
869
Client.__init__(self, *args, **kwargs)
1799
870
# Only now, when this client is initialized, can it show up on
1801
client_object_name = str(self.name).translate(
872
client_object_name = unicode(self.name).translate(
1802
873
{ord("."): ord("_"),
1803
874
ord("-"): ord("_")})
1804
self.dbus_object_path = dbus.ObjectPath(
1805
"/clients/" + client_object_name)
875
self.dbus_object_path = (dbus.ObjectPath
876
("/clients/" + client_object_name))
1806
877
DBusObjectWithProperties.__init__(self, self.bus,
1807
878
self.dbus_object_path)
1809
def notifychangeproperty(transform_func, dbus_name,
1810
type_func=lambda x: x,
1812
invalidate_only=False,
1813
_interface=_interface):
880
def notifychangeproperty(transform_func,
881
dbus_name, type_func=lambda x: x,
1814
883
""" Modify a variable so that it's a property which announces
1815
884
its changes to DBus.
1817
transform_fun: Function that takes a value and a variant_level
1818
and transforms it to a D-Bus type.
886
transform_fun: Function that takes a value and transforms it
1819
888
dbus_name: D-Bus name of the variable
1820
889
type_func: Function that transform the value before sending it
1821
890
to the D-Bus. Default: no transform
1822
891
variant_level: D-Bus variant level. Default: 1
1824
attrname = "_{}".format(dbus_name)
1826
894
def setter(self, value):
895
old_value = real_value[0]
896
real_value[0] = value
1827
897
if hasattr(self, "dbus_object_path"):
1828
if (not hasattr(self, attrname) or
1829
type_func(getattr(self, attrname, None))
1830
!= type_func(value)):
1832
self.PropertiesChanged(
1833
_interface, dbus.Dictionary(),
1834
dbus.Array((dbus_name, )))
1836
dbus_value = transform_func(
1838
variant_level=variant_level)
1839
self.PropertyChanged(dbus.String(dbus_name),
1841
self.PropertiesChanged(
1843
dbus.Dictionary({dbus.String(dbus_name):
1846
setattr(self, attrname, value)
1848
return property(lambda self: getattr(self, attrname), setter)
898
if type_func(old_value) != type_func(real_value[0]):
899
dbus_value = transform_func(type_func(real_value[0]),
901
self.PropertyChanged(dbus.String(dbus_name),
904
return property(lambda self: real_value[0], setter)
1850
907
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1851
908
approvals_pending = notifychangeproperty(dbus.Boolean,
1852
909
"ApprovalPending",
1854
911
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1855
912
last_enabled = notifychangeproperty(datetime_to_dbus,
1857
checker = notifychangeproperty(
1858
dbus.Boolean, "CheckerRunning",
1859
type_func=lambda checker: checker is not None)
914
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
915
type_func = lambda checker: checker is not None)
1860
916
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1861
917
"LastCheckedOK")
1862
last_checker_status = notifychangeproperty(dbus.Int16,
1863
"LastCheckerStatus")
1864
last_approval_request = notifychangeproperty(
1865
datetime_to_dbus, "LastApprovalRequest")
918
last_approval_request = notifychangeproperty(datetime_to_dbus,
919
"LastApprovalRequest")
1866
920
approved_by_default = notifychangeproperty(dbus.Boolean,
1867
921
"ApprovedByDefault")
1868
approval_delay = notifychangeproperty(
1869
dbus.UInt64, "ApprovalDelay",
1870
type_func=lambda td: td.total_seconds() * 1000)
1871
approval_duration = notifychangeproperty(
1872
dbus.UInt64, "ApprovalDuration",
1873
type_func=lambda td: td.total_seconds() * 1000)
922
approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",
923
type_func = _timedelta_to_milliseconds)
924
approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",
925
type_func = _timedelta_to_milliseconds)
1874
926
host = notifychangeproperty(dbus.String, "Host")
1875
timeout = notifychangeproperty(
1876
dbus.UInt64, "Timeout",
1877
type_func=lambda td: td.total_seconds() * 1000)
1878
extended_timeout = notifychangeproperty(
1879
dbus.UInt64, "ExtendedTimeout",
1880
type_func=lambda td: td.total_seconds() * 1000)
1881
interval = notifychangeproperty(
1882
dbus.UInt64, "Interval",
1883
type_func=lambda td: td.total_seconds() * 1000)
927
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
928
type_func = _timedelta_to_milliseconds)
929
extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",
930
type_func = _timedelta_to_milliseconds)
931
interval = notifychangeproperty(dbus.UInt16, "Interval",
932
type_func = _timedelta_to_milliseconds)
1884
933
checker_command = notifychangeproperty(dbus.String, "Checker")
1885
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1886
invalidate_only=True)
1888
935
del notifychangeproperty
1890
937
def __del__(self, *args, **kwargs):
1892
939
self.remove_from_connection()
2210
1226
self.start_checker()
2212
1228
self.stop_checker()
2214
1230
# ObjectPath - property
2216
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2217
"org.freedesktop.DBus.Deprecated": "true"})
2218
1231
@dbus_service_property(_interface, signature="o", access="read")
2219
1232
def ObjectPath_dbus_property(self):
2220
return self.dbus_object_path # is already a dbus.ObjectPath
1233
return self.dbus_object_path # is already a dbus.ObjectPath
2222
1235
# Secret = property
2224
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2226
@dbus_service_property(_interface,
1236
@dbus_service_property(_interface, signature="ay",
1237
access="write", byte_arrays=True)
2230
1238
def Secret_dbus_property(self, value):
2231
self.secret = bytes(value)
1239
self.secret = str(value)
2237
def __init__(self, child_pipe, key_id, fpr, address):
1244
class ProxyClient(object):
1245
def __init__(self, child_pipe, fpr, address):
2238
1246
self._pipe = child_pipe
2239
self._pipe.send(('init', key_id, fpr, address))
1247
self._pipe.send(('init', fpr, address))
2240
1248
if not self._pipe.recv():
2241
raise KeyError(key_id or fpr)
2243
1251
def __getattribute__(self, name):
1252
if(name == '_pipe'):
2245
1253
return super(ProxyClient, self).__getattribute__(name)
2246
1254
self._pipe.send(('getattr', name))
2247
1255
data = self._pipe.recv()
2248
1256
if data[0] == 'data':
2250
1258
if data[0] == 'function':
2252
1259
def func(*args, **kwargs):
2253
1260
self._pipe.send(('funcall', name, args, kwargs))
2254
1261
return self._pipe.recv()[1]
2258
1264
def __setattr__(self, name, value):
1265
if(name == '_pipe'):
2260
1266
return super(ProxyClient, self).__setattr__(name, value)
2261
1267
self._pipe.send(('setattr', name, value))
1269
class ClientDBusTransitional(ClientDBus):
1270
__metaclass__ = AlternateDBusNamesMetaclass
2264
1272
class ClientHandler(socketserver.BaseRequestHandler, object):
2265
1273
"""A class to handle client connections.
2267
1275
Instantiated once for each connection to handle it.
2268
1276
Note: This will run in its own forked process."""
2270
1278
def handle(self):
2271
1279
with contextlib.closing(self.server.child_pipe) as child_pipe:
2272
1280
logger.info("TCP connection from: %s",
2273
str(self.client_address))
1281
unicode(self.client_address))
2274
1282
logger.debug("Pipe FD: %d",
2275
1283
self.server.child_pipe.fileno())
2277
session = gnutls.ClientSession(self.request)
2279
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2280
# "+AES-256-CBC", "+SHA1",
2281
# "+COMP-NULL", "+CTYPE-OPENPGP",
1285
session = (gnutls.connection
1286
.ClientSession(self.request,
1288
.X509Credentials()))
1290
# Note: gnutls.connection.X509Credentials is really a
1291
# generic GnuTLS certificate credentials object so long as
1292
# no X.509 keys are added to it. Therefore, we can use it
1293
# here despite using OpenPGP certificates.
1295
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1296
# "+AES-256-CBC", "+SHA1",
1297
# "+COMP-NULL", "+CTYPE-OPENPGP",
2283
1299
# Use a fallback default, since this MUST be set.
2284
1300
priority = self.server.gnutls_priority
2285
1301
if priority is None:
2286
1302
priority = "NORMAL"
2287
gnutls.priority_set_direct(session._c_object,
2288
priority.encode("utf-8"),
1303
(gnutls.library.functions
1304
.gnutls_priority_set_direct(session._c_object,
2291
1307
# Start communication using the Mandos protocol
2292
1308
# Get protocol number
2293
1309
line = self.request.makefile().readline()
2294
1310
logger.debug("Protocol version: %r", line)
2296
1312
if int(line.strip().split()[0]) > 1:
2297
raise RuntimeError(line)
2298
1314
except (ValueError, IndexError, RuntimeError) as error:
2299
1315
logger.error("Unknown protocol version: %s", error)
2302
1318
# Start GnuTLS connection
2304
1320
session.handshake()
2305
except gnutls.Error as error:
1321
except gnutls.errors.GNUTLSError as error:
2306
1322
logger.warning("Handshake failed: %s", error)
2307
1323
# Do not run session.bye() here: the session is not
2308
1324
# established. Just abandon the request.
2310
1326
logger.debug("Handshake succeeded")
2312
1328
approval_required = False
2314
if gnutls.has_rawpk:
2317
key_id = self.key_id(
2318
self.peer_certificate(session))
2319
except (TypeError, gnutls.Error) as error:
2320
logger.warning("Bad certificate: %s", error)
2322
logger.debug("Key ID: %s", key_id)
2327
fpr = self.fingerprint(
2328
self.peer_certificate(session))
2329
except (TypeError, gnutls.Error) as error:
2330
logger.warning("Bad certificate: %s", error)
2332
logger.debug("Fingerprint: %s", fpr)
2335
client = ProxyClient(child_pipe, key_id, fpr,
1331
fpr = self.fingerprint(self.peer_certificate
1334
gnutls.errors.GNUTLSError) as error:
1335
logger.warning("Bad certificate: %s", error)
1337
logger.debug("Fingerprint: %s", fpr)
1340
client = ProxyClient(child_pipe, fpr,
2336
1341
self.client_address)
2337
1342
except KeyError:
2340
1345
if client.approval_delay:
2341
1346
delay = client.approval_delay
2342
1347
client.approvals_pending += 1
2343
1348
approval_required = True
2346
1351
if not client.enabled:
2347
1352
logger.info("Client %s is disabled",
2349
1354
if self.server.use_dbus:
2350
1355
# Emit D-Bus signal
2351
client.Rejected("Disabled")
1356
client.Rejected("Disabled")
2354
if client.approved or not client.approval_delay:
2355
# We are approved or approval is disabled
1359
if client._approved or not client.approval_delay:
1360
#We are approved or approval is disabled
2357
elif client.approved is None:
1362
elif client._approved is None:
2358
1363
logger.info("Client %s needs approval",
2360
1365
if self.server.use_dbus:
2361
1366
# Emit D-Bus signal
2362
1367
client.NeedApproval(
2363
client.approval_delay.total_seconds()
2364
* 1000, client.approved_by_default)
1368
client.approval_delay_milliseconds(),
1369
client.approved_by_default)
2366
1371
logger.warning("Client %s was not approved",
2391
1397
delay -= time2 - time
2394
session.send(client.secret)
2395
except gnutls.Error as error:
2396
logger.warning("gnutls send failed",
1400
while sent_size < len(client.secret):
1402
sent = session.send(client.secret[sent_size:])
1403
except gnutls.errors.GNUTLSError as error:
1404
logger.warning("gnutls send failed")
1406
logger.debug("Sent: %d, remaining: %d",
1407
sent, len(client.secret)
1408
- (sent_size + sent))
2400
1411
logger.info("Sending secret to %s", client.name)
2401
# bump the timeout using extended_timeout
2402
client.bump_timeout(client.extended_timeout)
1412
# bump the timeout as if seen
1413
client.checked_ok(client.extended_timeout)
2403
1414
if self.server.use_dbus:
2404
1415
# Emit D-Bus signal
2405
1416
client.GotSecret()
2408
1419
if approval_required:
2409
1420
client.approvals_pending -= 1
2412
except gnutls.Error as error:
2413
logger.warning("GnuTLS bye failed",
1423
except gnutls.errors.GNUTLSError as error:
1424
logger.warning("GnuTLS bye failed")
2417
1427
def peer_certificate(session):
2418
"Return the peer's certificate as a bytestring"
2420
cert_type = gnutls.certificate_type_get2(session._c_object,
2422
except AttributeError:
2423
cert_type = gnutls.certificate_type_get(session._c_object)
2424
if gnutls.has_rawpk:
2425
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2427
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2428
# If not a valid certificate type...
2429
if cert_type not in valid_cert_types:
2430
logger.info("Cert type %r not in %r", cert_type,
2432
# ...return invalid data
1428
"Return the peer's OpenPGP certificate as a bytestring"
1429
# If not an OpenPGP certificate...
1430
if (gnutls.library.functions
1431
.gnutls_certificate_type_get(session._c_object)
1432
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1433
# ...do the normal thing
1434
return session.peer_certificate
2434
1435
list_size = ctypes.c_uint(1)
2435
cert_list = (gnutls.certificate_get_peers
1436
cert_list = (gnutls.library.functions
1437
.gnutls_certificate_get_peers
2436
1438
(session._c_object, ctypes.byref(list_size)))
2437
1439
if not bool(cert_list) and list_size.value != 0:
2438
raise gnutls.Error("error getting peer certificate")
1440
raise gnutls.errors.GNUTLSError("error getting peer"
2439
1442
if list_size.value == 0:
2441
1444
cert = cert_list[0]
2442
1445
return ctypes.string_at(cert.data, cert.size)
2445
def key_id(certificate):
2446
"Convert a certificate bytestring to a hexdigit key ID"
2447
# New GnuTLS "datum" with the public key
2448
datum = gnutls.datum_t(
2449
ctypes.cast(ctypes.c_char_p(certificate),
2450
ctypes.POINTER(ctypes.c_ubyte)),
2451
ctypes.c_uint(len(certificate)))
2452
# XXX all these need to be created in the gnutls "module"
2453
# New empty GnuTLS certificate
2454
pubkey = gnutls.pubkey_t()
2455
gnutls.pubkey_init(ctypes.byref(pubkey))
2456
# Import the raw public key into the certificate
2457
gnutls.pubkey_import(pubkey,
2458
ctypes.byref(datum),
2459
gnutls.X509_FMT_DER)
2460
# New buffer for the key ID
2461
buf = ctypes.create_string_buffer(32)
2462
buf_len = ctypes.c_size_t(len(buf))
2463
# Get the key ID from the raw public key into the buffer
2464
gnutls.pubkey_get_key_id(pubkey,
2465
gnutls.KEYID_USE_SHA256,
2466
ctypes.cast(ctypes.byref(buf),
2467
ctypes.POINTER(ctypes.c_ubyte)),
2468
ctypes.byref(buf_len))
2469
# Deinit the certificate
2470
gnutls.pubkey_deinit(pubkey)
2472
# Convert the buffer to a Python bytestring
2473
key_id = ctypes.string_at(buf, buf_len.value)
2474
# Convert the bytestring to hexadecimal notation
2475
hex_key_id = binascii.hexlify(key_id).upper()
2479
1448
def fingerprint(openpgp):
2480
1449
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2481
1450
# New GnuTLS "datum" with the OpenPGP public key
2482
datum = gnutls.datum_t(
2483
ctypes.cast(ctypes.c_char_p(openpgp),
2484
ctypes.POINTER(ctypes.c_ubyte)),
2485
ctypes.c_uint(len(openpgp)))
1451
datum = (gnutls.library.types
1452
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1455
ctypes.c_uint(len(openpgp))))
2486
1456
# New empty GnuTLS certificate
2487
crt = gnutls.openpgp_crt_t()
2488
gnutls.openpgp_crt_init(ctypes.byref(crt))
1457
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1458
(gnutls.library.functions
1459
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2489
1460
# Import the OpenPGP public key into the certificate
2490
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2491
gnutls.OPENPGP_FMT_RAW)
1461
(gnutls.library.functions
1462
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1463
gnutls.library.constants
1464
.GNUTLS_OPENPGP_FMT_RAW))
2492
1465
# Verify the self signature in the key
2493
1466
crtverify = ctypes.c_uint()
2494
gnutls.openpgp_crt_verify_self(crt, 0,
2495
ctypes.byref(crtverify))
1467
(gnutls.library.functions
1468
.gnutls_openpgp_crt_verify_self(crt, 0,
1469
ctypes.byref(crtverify)))
2496
1470
if crtverify.value != 0:
2497
gnutls.openpgp_crt_deinit(crt)
2498
raise gnutls.CertificateSecurityError(code
1471
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1472
raise (gnutls.errors.CertificateSecurityError
2500
1474
# New buffer for the fingerprint
2501
1475
buf = ctypes.create_string_buffer(20)
2502
1476
buf_len = ctypes.c_size_t()
2503
1477
# Get the fingerprint from the certificate into the buffer
2504
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2505
ctypes.byref(buf_len))
1478
(gnutls.library.functions
1479
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1480
ctypes.byref(buf_len)))
2506
1481
# Deinit the certificate
2507
gnutls.openpgp_crt_deinit(crt)
1482
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2508
1483
# Convert the buffer to a Python bytestring
2509
1484
fpr = ctypes.string_at(buf, buf_len.value)
2510
1485
# Convert the bytestring to hexadecimal notation
2511
hex_fpr = binascii.hexlify(fpr).upper()
1486
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2515
class MultiprocessingMixIn:
1490
class MultiprocessingMixIn(object):
2516
1491
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2518
1492
def sub_process_main(self, request, address):
2520
1494
self.finish_request(request, address)
2522
1496
self.handle_error(request, address)
2523
1497
self.close_request(request)
2525
1499
def process_request(self, request, address):
2526
1500
"""Start a new process to process the request."""
2527
proc = multiprocessing.Process(target=self.sub_process_main,
2528
args=(request, address))
2533
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
1501
multiprocessing.Process(target = self.sub_process_main,
1502
args = (request, address)).start()
1505
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2534
1506
""" adds a pipe to the MixIn """
2536
1507
def process_request(self, request, client_address):
2537
1508
"""Overrides and wraps the original process_request().
2539
1510
This function creates a new pipe in self.pipe
2541
1512
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2543
proc = MultiprocessingMixIn.process_request(self, request,
1514
super(MultiprocessingMixInWithPipe,
1515
self).process_request(request, client_address)
2545
1516
self.child_pipe.close()
2546
self.add_pipe(parent_pipe, proc)
2548
def add_pipe(self, parent_pipe, proc):
1517
self.add_pipe(parent_pipe)
1519
def add_pipe(self, parent_pipe):
2549
1520
"""Dummy function; override as necessary"""
2550
raise NotImplementedError()
1521
raise NotImplementedError
2553
1524
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2554
socketserver.TCPServer):
1525
socketserver.TCPServer, object):
2555
1526
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2558
1529
enabled: Boolean; whether this server is activated yet
2559
1530
interface: None or a network interface name (string)
2560
1531
use_ipv6: Boolean; to use IPv6 or not
2563
1533
def __init__(self, server_address, RequestHandlerClass,
2567
"""If socketfd is set, use that file descriptor instead of
2568
creating a new one with socket.socket().
1534
interface=None, use_ipv6=True):
2570
1535
self.interface = interface
2572
1537
self.address_family = socket.AF_INET6
2573
if socketfd is not None:
2574
# Save the file descriptor
2575
self.socketfd = socketfd
2576
# Save the original socket.socket() function
2577
self.socket_socket = socket.socket
2579
# To implement --socket, we monkey patch socket.socket.
2581
# (When socketserver.TCPServer is a new-style class, we
2582
# could make self.socket into a property instead of monkey
2583
# patching socket.socket.)
2585
# Create a one-time-only replacement for socket.socket()
2586
@functools.wraps(socket.socket)
2587
def socket_wrapper(*args, **kwargs):
2588
# Restore original function so subsequent calls are
2590
socket.socket = self.socket_socket
2591
del self.socket_socket
2592
# This time only, return a new socket object from the
2593
# saved file descriptor.
2594
return socket.fromfd(self.socketfd, *args, **kwargs)
2595
# Replace socket.socket() function with wrapper
2596
socket.socket = socket_wrapper
2597
# The socketserver.TCPServer.__init__ will call
2598
# socket.socket(), which might be our replacement,
2599
# socket_wrapper(), if socketfd was set.
2600
1538
socketserver.TCPServer.__init__(self, server_address,
2601
1539
RequestHandlerClass)
2603
1540
def server_bind(self):
2604
1541
"""This overrides the normal server_bind() function
2605
1542
to bind to an interface if one was specified, and also NOT to
2606
1543
bind to an address or port if they were not specified."""
2607
global SO_BINDTODEVICE
2608
1544
if self.interface is not None:
2609
1545
if SO_BINDTODEVICE is None:
2610
# Fall back to a hard-coded value which seems to be
2612
logger.warning("SO_BINDTODEVICE not found, trying 25")
2613
SO_BINDTODEVICE = 25
2615
self.socket.setsockopt(
2616
socket.SOL_SOCKET, SO_BINDTODEVICE,
2617
(self.interface + "\0").encode("utf-8"))
2618
except socket.error as error:
2619
if error.errno == errno.EPERM:
2620
logger.error("No permission to bind to"
2621
" interface %s", self.interface)
2622
elif error.errno == errno.ENOPROTOOPT:
2623
logger.error("SO_BINDTODEVICE not available;"
2624
" cannot bind to interface %s",
2626
elif error.errno == errno.ENODEV:
2627
logger.error("Interface %s does not exist,"
2628
" cannot bind", self.interface)
1546
logger.error("SO_BINDTODEVICE does not exist;"
1547
" cannot bind to interface %s",
1551
self.socket.setsockopt(socket.SOL_SOCKET,
1555
except socket.error as error:
1556
if error[0] == errno.EPERM:
1557
logger.error("No permission to"
1558
" bind to interface %s",
1560
elif error[0] == errno.ENOPROTOOPT:
1561
logger.error("SO_BINDTODEVICE not available;"
1562
" cannot bind to interface %s",
2631
1566
# Only bind(2) the socket if we really need to.
2632
1567
if self.server_address[0] or self.server_address[1]:
2633
if self.server_address[1]:
2634
self.allow_reuse_address = True
2635
1568
if not self.server_address[0]:
2636
1569
if self.address_family == socket.AF_INET6:
2637
any_address = "::" # in6addr_any
1570
any_address = "::" # in6addr_any
2639
any_address = "0.0.0.0" # INADDR_ANY
1572
any_address = socket.INADDR_ANY
2640
1573
self.server_address = (any_address,
2641
1574
self.server_address[1])
2642
1575
elif not self.server_address[1]:
2643
self.server_address = (self.server_address[0], 0)
1576
self.server_address = (self.server_address[0],
2644
1578
# if self.interface:
2645
1579
# self.server_address = (self.server_address[0],
2653
1587
class MandosServer(IPv6_TCPServer):
2654
1588
"""Mandos server.
2657
1591
clients: set of Client objects
2658
1592
gnutls_priority GnuTLS priority string
2659
1593
use_dbus: Boolean; to emit D-Bus signals or not
2661
Assumes a GLib.MainLoop event loop.
1595
Assumes a gobject.MainLoop event loop.
2664
1597
def __init__(self, server_address, RequestHandlerClass,
2668
gnutls_priority=None,
1598
interface=None, use_ipv6=True, clients=None,
1599
gnutls_priority=None, use_dbus=True):
2671
1600
self.enabled = False
2672
1601
self.clients = clients
2673
1602
if self.clients is None:
1603
self.clients = set()
2675
1604
self.use_dbus = use_dbus
2676
1605
self.gnutls_priority = gnutls_priority
2677
1606
IPv6_TCPServer.__init__(self, server_address,
2678
1607
RequestHandlerClass,
2679
interface=interface,
1608
interface = interface,
1609
use_ipv6 = use_ipv6)
2683
1610
def server_activate(self):
2684
1611
if self.enabled:
2685
1612
return socketserver.TCPServer.server_activate(self)
2687
1613
def enable(self):
2688
1614
self.enabled = True
2690
def add_pipe(self, parent_pipe, proc):
1615
def add_pipe(self, parent_pipe):
2691
1616
# Call "handle_ipc" for both data and EOF events
2693
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2694
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2695
functools.partial(self.handle_ipc,
2696
parent_pipe=parent_pipe,
2699
def handle_ipc(self, source, condition,
1617
gobject.io_add_watch(parent_pipe.fileno(),
1618
gobject.IO_IN | gobject.IO_HUP,
1619
functools.partial(self.handle_ipc,
1620
parent_pipe = parent_pipe))
1622
def handle_ipc(self, source, condition, parent_pipe=None,
2702
1623
client_object=None):
2703
# error, or the other end of multiprocessing.Pipe has closed
2704
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2705
# Wait for other process to exit
1625
gobject.IO_IN: "IN", # There is data to read.
1626
gobject.IO_OUT: "OUT", # Data can be written (without
1628
gobject.IO_PRI: "PRI", # There is urgent data to read.
1629
gobject.IO_ERR: "ERR", # Error condition.
1630
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1631
# broken, usually for pipes and
1634
conditions_string = ' | '.join(name
1636
condition_names.iteritems()
1637
if cond & condition)
1638
# error or the other end of multiprocessing.Pipe has closed
1639
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2709
1642
# Read a request from the child
2710
1643
request = parent_pipe.recv()
2711
1644
command = request[0]
2713
1646
if command == 'init':
2714
key_id = request[1].decode("ascii")
2715
fpr = request[2].decode("ascii")
2716
address = request[3]
2718
for c in self.clients.values():
2719
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2721
if key_id and c.key_id == key_id:
2724
if fpr and c.fingerprint == fpr:
1648
address = request[2]
1650
for c in self.clients:
1651
if c.fingerprint == fpr:
2728
logger.info("Client not found for key ID: %s, address"
2729
": %s", key_id or fpr, address)
1655
logger.info("Client not found for fingerprint: %s, ad"
1656
"dress: %s", fpr, address)
2730
1657
if self.use_dbus:
2731
1658
# Emit D-Bus signal
2732
mandos_dbus_service.ClientNotFound(key_id or fpr,
1659
mandos_dbus_service.ClientNotFound(fpr, address[0])
2734
1660
parent_pipe.send(False)
2738
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2739
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2740
functools.partial(self.handle_ipc,
2741
parent_pipe=parent_pipe,
2743
client_object=client))
1663
gobject.io_add_watch(parent_pipe.fileno(),
1664
gobject.IO_IN | gobject.IO_HUP,
1665
functools.partial(self.handle_ipc,
1666
parent_pipe = parent_pipe,
1667
client_object = client))
2744
1668
parent_pipe.send(True)
2745
# remove the old hook in favor of the new above hook on
1669
# remove the old hook in favor of the new above hook on same fileno
2748
1671
if command == 'funcall':
2749
1672
funcname = request[1]
2750
1673
args = request[2]
2751
1674
kwargs = request[3]
2753
parent_pipe.send(('data', getattr(client_object,
1676
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
2757
1678
if command == 'getattr':
2758
1679
attrname = request[1]
2759
if isinstance(client_object.__getattribute__(attrname),
2760
collections.abc.Callable):
2761
parent_pipe.send(('function', ))
1680
if callable(client_object.__getattribute__(attrname)):
1681
parent_pipe.send(('function',))
2764
'data', client_object.__getattribute__(attrname)))
1683
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2766
1685
if command == 'setattr':
2767
1686
attrname = request[1]
2768
1687
value = request[2]
2769
1688
setattr(client_object, attrname, value)
2774
def rfc3339_duration_to_delta(duration):
2775
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2777
>>> rfc3339_duration_to_delta("P7D") == datetime.timedelta(7)
2779
>>> rfc3339_duration_to_delta("PT60S") == datetime.timedelta(0, 60)
2781
>>> rfc3339_duration_to_delta("PT60M") == datetime.timedelta(0, 3600)
2783
>>> rfc3339_duration_to_delta("PT24H") == datetime.timedelta(1)
2785
>>> rfc3339_duration_to_delta("P1W") == datetime.timedelta(7)
2787
>>> rfc3339_duration_to_delta("PT5M30S") == datetime.timedelta(0, 330)
2789
>>> rfc3339_duration_to_delta("P1DT3M20S") == datetime.timedelta(1, 200)
2793
# Parsing an RFC 3339 duration with regular expressions is not
2794
# possible - there would have to be multiple places for the same
2795
# values, like seconds. The current code, while more esoteric, is
2796
# cleaner without depending on a parsing library. If Python had a
2797
# built-in library for parsing we would use it, but we'd like to
2798
# avoid excessive use of external libraries.
2800
# New type for defining tokens, syntax, and semantics all-in-one
2801
Token = collections.namedtuple("Token", (
2802
"regexp", # To match token; if "value" is not None, must have
2803
# a "group" containing digits
2804
"value", # datetime.timedelta or None
2805
"followers")) # Tokens valid after this token
2806
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2807
# the "duration" ABNF definition in RFC 3339, Appendix A.
2808
token_end = Token(re.compile(r"$"), None, frozenset())
2809
token_second = Token(re.compile(r"(\d+)S"),
2810
datetime.timedelta(seconds=1),
2811
frozenset((token_end, )))
2812
token_minute = Token(re.compile(r"(\d+)M"),
2813
datetime.timedelta(minutes=1),
2814
frozenset((token_second, token_end)))
2815
token_hour = Token(re.compile(r"(\d+)H"),
2816
datetime.timedelta(hours=1),
2817
frozenset((token_minute, token_end)))
2818
token_time = Token(re.compile(r"T"),
2820
frozenset((token_hour, token_minute,
2822
token_day = Token(re.compile(r"(\d+)D"),
2823
datetime.timedelta(days=1),
2824
frozenset((token_time, token_end)))
2825
token_month = Token(re.compile(r"(\d+)M"),
2826
datetime.timedelta(weeks=4),
2827
frozenset((token_day, token_end)))
2828
token_year = Token(re.compile(r"(\d+)Y"),
2829
datetime.timedelta(weeks=52),
2830
frozenset((token_month, token_end)))
2831
token_week = Token(re.compile(r"(\d+)W"),
2832
datetime.timedelta(weeks=1),
2833
frozenset((token_end, )))
2834
token_duration = Token(re.compile(r"P"), None,
2835
frozenset((token_year, token_month,
2836
token_day, token_time,
2838
# Define starting values:
2840
value = datetime.timedelta()
2842
# Following valid tokens
2843
followers = frozenset((token_duration, ))
2844
# String left to parse
2846
# Loop until end token is found
2847
while found_token is not token_end:
2848
# Search for any currently valid tokens
2849
for token in followers:
2850
match = token.regexp.match(s)
2851
if match is not None:
2853
if token.value is not None:
2854
# Value found, parse digits
2855
factor = int(match.group(1), 10)
2856
# Add to value so far
2857
value += factor * token.value
2858
# Strip token from string
2859
s = token.regexp.sub("", s, 1)
2862
# Set valid next tokens
2863
followers = found_token.followers
2866
# No currently valid tokens were found
2867
raise ValueError("Invalid RFC 3339 duration: {!r}"
2873
1693
def string_to_delta(interval):
2874
1694
"""Parse a string and return a datetime.timedelta
2876
>>> string_to_delta('7d') == datetime.timedelta(7)
2878
>>> string_to_delta('60s') == datetime.timedelta(0, 60)
2880
>>> string_to_delta('60m') == datetime.timedelta(0, 3600)
2882
>>> string_to_delta('24h') == datetime.timedelta(1)
2884
>>> string_to_delta('1w') == datetime.timedelta(7)
2886
>>> string_to_delta('5m 30s') == datetime.timedelta(0, 330)
1696
>>> string_to_delta('7d')
1697
datetime.timedelta(7)
1698
>>> string_to_delta('60s')
1699
datetime.timedelta(0, 60)
1700
>>> string_to_delta('60m')
1701
datetime.timedelta(0, 3600)
1702
>>> string_to_delta('24h')
1703
datetime.timedelta(1)
1704
>>> string_to_delta('1w')
1705
datetime.timedelta(7)
1706
>>> string_to_delta('5m 30s')
1707
datetime.timedelta(0, 330)
2891
return rfc3339_duration_to_delta(interval)
2895
1709
timevalue = datetime.timedelta(0)
2896
1710
for s in interval.split():
1712
suffix = unicode(s[-1])
2899
1713
value = int(s[:-1])
2900
1714
if suffix == "d":
2901
1715
delta = datetime.timedelta(value)
2973
1811
parser.add_argument("--no-dbus", action="store_false",
2974
1812
dest="use_dbus", help="Do not provide D-Bus"
2975
" system bus interface", default=None)
1813
" system bus interface")
2976
1814
parser.add_argument("--no-ipv6", action="store_false",
2977
dest="use_ipv6", help="Do not use IPv6",
2979
parser.add_argument("--no-restore", action="store_false",
2980
dest="restore", help="Do not restore stored"
2981
" state", default=None)
2982
parser.add_argument("--socket", type=int,
2983
help="Specify a file descriptor to a network"
2984
" socket to use instead of creating one")
2985
parser.add_argument("--statedir", metavar="DIR",
2986
help="Directory to save/restore state in")
2987
parser.add_argument("--foreground", action="store_true",
2988
help="Run in foreground", default=None)
2989
parser.add_argument("--no-zeroconf", action="store_false",
2990
dest="zeroconf", help="Do not use Zeroconf",
1815
dest="use_ipv6", help="Do not use IPv6")
2993
1816
options = parser.parse_args()
2995
1823
# Default values for config file for server-global settings
2996
if gnutls.has_rawpk:
2997
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2998
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
3000
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
3001
":+SIGN-DSA-SHA256")
3002
server_defaults = {"interface": "",
3006
"priority": priority,
3007
"servicename": "Mandos",
3013
"statedir": "/var/lib/mandos",
3014
"foreground": "False",
1824
server_defaults = { "interface": "",
1829
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1830
"servicename": "Mandos",
3019
1836
# Parse config file for server-global settings
3020
server_config = configparser.ConfigParser(server_defaults)
1837
server_config = configparser.SafeConfigParser(server_defaults)
3021
1838
del server_defaults
3022
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3023
# Convert the ConfigParser object to a dict
1839
server_config.read(os.path.join(options.configdir,
1841
# Convert the SafeConfigParser object to a dict
3024
1842
server_settings = server_config.defaults()
3025
1843
# Use the appropriate methods on the non-string config options
3026
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3027
"foreground", "zeroconf"):
1844
for option in ("debug", "use_dbus", "use_ipv6"):
3028
1845
server_settings[option] = server_config.getboolean("DEFAULT",
3030
1847
if server_settings["port"]:
3031
1848
server_settings["port"] = server_config.getint("DEFAULT",
3033
if server_settings["socket"]:
3034
server_settings["socket"] = server_config.getint("DEFAULT",
3036
# Later, stdin will, and stdout and stderr might, be dup'ed
3037
# over with an opened os.devnull. But we don't want this to
3038
# happen with a supplied network socket.
3039
if 0 <= server_settings["socket"] <= 2:
3040
server_settings["socket"] = os.dup(server_settings
3042
1850
del server_config
3044
1852
# Override the settings from the config file with command line
3045
1853
# options, if set.
3046
1854
for option in ("interface", "address", "port", "debug",
3047
"priority", "servicename", "configdir", "use_dbus",
3048
"use_ipv6", "debuglevel", "restore", "statedir",
3049
"socket", "foreground", "zeroconf"):
1855
"priority", "servicename", "configdir",
1856
"use_dbus", "use_ipv6", "debuglevel"):
3050
1857
value = getattr(options, option)
3051
1858
if value is not None:
3052
1859
server_settings[option] = value
3054
1861
# Force all strings to be unicode
3055
1862
for option in server_settings.keys():
3056
if isinstance(server_settings[option], bytes):
3057
server_settings[option] = (server_settings[option]
3059
# Force all boolean options to be boolean
3060
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3061
"foreground", "zeroconf"):
3062
server_settings[option] = bool(server_settings[option])
3063
# Debug implies foreground
3064
if server_settings["debug"]:
3065
server_settings["foreground"] = True
1863
if type(server_settings[option]) is str:
1864
server_settings[option] = unicode(server_settings[option])
3066
1865
# Now we have our good server settings in "server_settings"
3068
1867
##################################################################
3070
if (not server_settings["zeroconf"]
3071
and not (server_settings["port"]
3072
or server_settings["socket"] != "")):
3073
parser.error("Needs port or socket to work without Zeroconf")
3075
1869
# For convenience
3076
1870
debug = server_settings["debug"]
3077
1871
debuglevel = server_settings["debuglevel"]
3078
1872
use_dbus = server_settings["use_dbus"]
3079
1873
use_ipv6 = server_settings["use_ipv6"]
3080
stored_state_path = os.path.join(server_settings["statedir"],
3082
foreground = server_settings["foreground"]
3083
zeroconf = server_settings["zeroconf"]
3086
initlogger(debug, logging.DEBUG)
3091
level = getattr(logging, debuglevel.upper())
3092
initlogger(debug, level)
3094
1875
if server_settings["servicename"] != "Mandos":
3095
syslogger.setFormatter(
3096
logging.Formatter('Mandos ({}) [%(process)d]:'
3097
' %(levelname)s: %(message)s'.format(
3098
server_settings["servicename"])))
1876
syslogger.setFormatter(logging.Formatter
1877
('Mandos (%s) [%%(process)d]:'
1878
' %%(levelname)s: %%(message)s'
1879
% server_settings["servicename"]))
3100
1881
# Parse config file with clients
3101
client_config = configparser.ConfigParser(Client.client_defaults)
1882
client_defaults = { "timeout": "5m",
1883
"extended_timeout": "15m",
1885
"checker": "fping -q -- %%(host)s",
1887
"approval_delay": "0s",
1888
"approval_duration": "1s",
1890
client_config = configparser.SafeConfigParser(client_defaults)
3102
1891
client_config.read(os.path.join(server_settings["configdir"],
3103
1892
"clients.conf"))
3105
1894
global mandos_dbus_service
3106
1895
mandos_dbus_service = None
3109
if server_settings["socket"] != "":
3110
socketfd = server_settings["socket"]
3111
tcp_server = MandosServer(
3112
(server_settings["address"], server_settings["port"]),
3114
interface=(server_settings["interface"] or None),
3116
gnutls_priority=server_settings["priority"],
3120
pidfilename = "/run/mandos.pid"
3121
if not os.path.isdir("/run/."):
3122
pidfilename = "/var/run/mandos.pid"
3125
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3126
except IOError as e:
3127
logger.error("Could not open file %r", pidfilename,
3130
for name, group in (("_mandos", "_mandos"),
3131
("mandos", "mandos"),
3132
("nobody", "nogroup")):
3134
uid = pwd.getpwnam(name).pw_uid
3135
gid = pwd.getpwnam(group).pw_gid
1897
tcp_server = MandosServer((server_settings["address"],
1898
server_settings["port"]),
1900
interface=(server_settings["interface"]
1904
server_settings["priority"],
1907
pidfilename = "/var/run/mandos.pid"
1909
pidfile = open(pidfilename, "w")
1911
logger.error("Could not open file %r", pidfilename)
1914
uid = pwd.getpwnam("_mandos").pw_uid
1915
gid = pwd.getpwnam("_mandos").pw_gid
1918
uid = pwd.getpwnam("mandos").pw_uid
1919
gid = pwd.getpwnam("mandos").pw_gid
3137
1920
except KeyError:
1922
uid = pwd.getpwnam("nobody").pw_uid
1923
gid = pwd.getpwnam("nobody").pw_gid
3146
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3148
1930
except OSError as error:
3149
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3150
.format(uid, gid, os.strerror(error.errno)))
3151
if error.errno != errno.EPERM:
1931
if error[0] != errno.EPERM:
1934
if not debug and not debuglevel:
1935
syslogger.setLevel(logging.WARNING)
1936
console.setLevel(logging.WARNING)
1938
level = getattr(logging, debuglevel.upper())
1939
syslogger.setLevel(level)
1940
console.setLevel(level)
3155
1943
# Enable all possible GnuTLS debugging
3157
1945
# "Use a log level over 10 to enable all debugging options."
3158
1946
# - GnuTLS manual
3159
gnutls.global_set_log_level(11)
1947
gnutls.library.functions.gnutls_global_set_log_level(11)
1949
@gnutls.library.types.gnutls_log_func
3162
1950
def debug_gnutls(level, string):
3163
1951
logger.debug("GnuTLS: %s", string[:-1])
3165
gnutls.global_set_log_function(debug_gnutls)
1953
(gnutls.library.functions
1954
.gnutls_global_set_log_function(debug_gnutls))
3167
1956
# Redirect stdin so all checkers get /dev/null
3168
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1957
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3169
1958
os.dup2(null, sys.stdin.fileno())
1962
# No console logging
1963
logger.removeHandler(console)
3173
1965
# Need to fork before connecting to D-Bus
3175
1967
# Close all input and output, do double fork, etc.
3178
if gi.version_info < (3, 10, 2):
3179
# multiprocessing will use threads, so before we use GLib we
3180
# need to inform GLib that threads will be used.
3183
1970
global main_loop
3184
1971
# From the Avahi example code
3185
DBusGMainLoop(set_as_default=True)
3186
main_loop = GLib.MainLoop()
1972
DBusGMainLoop(set_as_default=True )
1973
main_loop = gobject.MainLoop()
3187
1974
bus = dbus.SystemBus()
3188
1975
# End of Avahi example code
3191
1978
bus_name = dbus.service.BusName("se.recompile.Mandos",
3194
old_bus_name = dbus.service.BusName(
3195
"se.bsnet.fukt.Mandos", bus,
3197
except dbus.exceptions.DBusException as e:
3198
logger.error("Disabling D-Bus:", exc_info=e)
1979
bus, do_not_queue=True)
1980
old_bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1981
bus, do_not_queue=True)
1982
except dbus.exceptions.NameExistsException as e:
1983
logger.error(unicode(e) + ", disabling D-Bus")
3199
1984
use_dbus = False
3200
1985
server_settings["use_dbus"] = False
3201
1986
tcp_server.use_dbus = False
3203
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3204
service = AvahiServiceToSyslog(
3205
name=server_settings["servicename"],
3206
servicetype="_mandos._tcp",
3209
if server_settings["interface"]:
3210
service.interface = if_nametoindex(
3211
server_settings["interface"].encode("utf-8"))
1987
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1988
service = AvahiService(name = server_settings["servicename"],
1989
servicetype = "_mandos._tcp",
1990
protocol = protocol, bus = bus)
1991
if server_settings["interface"]:
1992
service.interface = (if_nametoindex
1993
(str(server_settings["interface"])))
3213
1995
global multiprocessing_manager
3214
1996
multiprocessing_manager = multiprocessing.Manager()
3216
1998
client_class = Client
3218
client_class = functools.partial(ClientDBus, bus=bus)
3220
client_settings = Client.config_parser(client_config)
3221
old_client_settings = {}
3224
# This is used to redirect stdout and stderr for checker processes
3226
wnull = open(os.devnull, "w") # A writable /dev/null
3227
# Only used if server is running in foreground but not in debug
3229
if debug or not foreground:
3232
# Get client data and settings from last running state.
3233
if server_settings["restore"]:
3235
with open(stored_state_path, "rb") as stored_state:
3236
if sys.version_info.major == 2:
3237
clients_data, old_client_settings = pickle.load(
3240
bytes_clients_data, bytes_old_client_settings = (
3241
pickle.load(stored_state, encoding="bytes"))
3242
# Fix bytes to strings
3245
clients_data = {(key.decode("utf-8")
3246
if isinstance(key, bytes)
3249
bytes_clients_data.items()}
3250
del bytes_clients_data
3251
for key in clients_data:
3252
value = {(k.decode("utf-8")
3253
if isinstance(k, bytes) else k): v
3255
clients_data[key].items()}
3256
clients_data[key] = value
3258
value["client_structure"] = [
3260
if isinstance(s, bytes)
3262
value["client_structure"]]
3263
# .name, .host, and .checker_command
3264
for k in ("name", "host", "checker_command"):
3265
if isinstance(value[k], bytes):
3266
value[k] = value[k].decode("utf-8")
3267
if "key_id" not in value:
3268
value["key_id"] = ""
3269
elif "fingerprint" not in value:
3270
value["fingerprint"] = ""
3271
# old_client_settings
3273
old_client_settings = {
3274
(key.decode("utf-8")
3275
if isinstance(key, bytes)
3278
bytes_old_client_settings.items()}
3279
del bytes_old_client_settings
3280
# .host and .checker_command
3281
for value in old_client_settings.values():
3282
for attribute in ("host", "checker_command"):
3283
if isinstance(value[attribute], bytes):
3284
value[attribute] = (value[attribute]
3286
os.remove(stored_state_path)
3287
except IOError as e:
3288
if e.errno == errno.ENOENT:
3289
logger.warning("Could not load persistent state:"
3290
" {}".format(os.strerror(e.errno)))
3292
logger.critical("Could not load persistent state:",
3295
except EOFError as e:
3296
logger.warning("Could not load persistent state: "
3300
with PGPEngine() as pgp:
3301
for client_name, client in clients_data.items():
3302
# Skip removed clients
3303
if client_name not in client_settings:
3306
# Decide which value to use after restoring saved state.
3307
# We have three different values: Old config file,
3308
# new config file, and saved state.
3309
# New config value takes precedence if it differs from old
3310
# config value, otherwise use saved state.
3311
for name, value in client_settings[client_name].items():
3313
# For each value in new config, check if it
3314
# differs from the old config value (Except for
3315
# the "secret" attribute)
3316
if (name != "secret"
3318
old_client_settings[client_name][name])):
3319
client[name] = value
3323
# Clients who has passed its expire date can still be
3324
# enabled if its last checker was successful. A Client
3325
# whose checker succeeded before we stored its state is
3326
# assumed to have successfully run all checkers during
3328
if client["enabled"]:
3329
if datetime.datetime.utcnow() >= client["expires"]:
3330
if not client["last_checked_ok"]:
3332
"disabling client {} - Client never "
3333
"performed a successful checker".format(
3335
client["enabled"] = False
3336
elif client["last_checker_status"] != 0:
3338
"disabling client {} - Client last"
3339
" checker failed with error code"
3342
client["last_checker_status"]))
3343
client["enabled"] = False
3345
client["expires"] = (
3346
datetime.datetime.utcnow()
3347
+ client["timeout"])
3348
logger.debug("Last checker succeeded,"
3349
" keeping {} enabled".format(
2000
client_class = functools.partial(ClientDBusTransitional, bus = bus)
2001
def client_config_items(config, section):
2002
special_settings = {
2003
"approved_by_default":
2004
lambda: config.getboolean(section,
2005
"approved_by_default"),
2007
for name, value in config.items(section):
3352
client["secret"] = pgp.decrypt(
3353
client["encrypted_secret"],
3354
client_settings[client_name]["secret"])
3356
# If decryption fails, we use secret from new settings
3357
logger.debug("Failed to decrypt {} old secret".format(
3359
client["secret"] = (client_settings[client_name]
3362
# Add/remove clients based on new changes made to config
3363
for client_name in (set(old_client_settings)
3364
- set(client_settings)):
3365
del clients_data[client_name]
3366
for client_name in (set(client_settings)
3367
- set(old_client_settings)):
3368
clients_data[client_name] = client_settings[client_name]
3370
# Create all client objects
3371
for client_name, client in clients_data.items():
3372
tcp_server.clients[client_name] = client_class(
3375
server_settings=server_settings)
2009
yield (name, special_settings[name]())
2013
tcp_server.clients.update(set(
2014
client_class(name = section,
2015
config= dict(client_config_items(
2016
client_config, section)))
2017
for section in client_config.sections()))
3377
2018
if not tcp_server.clients:
3378
2019
logger.warning("No clients defined")
3381
if pidfile is not None:
3385
print(pid, file=pidfile)
3387
logger.error("Could not write to file %r with PID %d",
2025
pidfile.write(str(pid) + "\n".encode("utf-8"))
2028
logger.error("Could not write to file %r with PID %d",
2031
# "pidfile" was never created
3390
2033
del pidfilename
3392
for termsig in (signal.SIGHUP, signal.SIGTERM):
3393
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3394
lambda: main_loop.quit() and False)
2035
signal.signal(signal.SIGINT, signal.SIG_IGN)
2037
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2038
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3398
@alternate_dbus_interfaces(
3399
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3400
class MandosDBusService(DBusObjectWithObjectManager):
2041
class MandosDBusService(dbus.service.Object):
3401
2042
"""A D-Bus proxy object"""
3403
2043
def __init__(self):
3404
2044
dbus.service.Object.__init__(self, bus, "/")
3406
2045
_interface = "se.recompile.Mandos"
3408
2047
@dbus.service.signal(_interface, signature="o")
3409
2048
def ClientAdded(self, objpath):
3413
2052
@dbus.service.signal(_interface, signature="ss")
3414
def ClientNotFound(self, key_id, address):
2053
def ClientNotFound(self, fingerprint, address):
3418
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3420
2057
@dbus.service.signal(_interface, signature="os")
3421
2058
def ClientRemoved(self, objpath, name):
3425
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3427
2062
@dbus.service.method(_interface, out_signature="ao")
3428
2063
def GetAllClients(self):
3430
return dbus.Array(c.dbus_object_path for c in
3431
tcp_server.clients.values())
3433
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2065
return dbus.Array(c.dbus_object_path
2066
for c in tcp_server.clients)
3435
2068
@dbus.service.method(_interface,
3436
2069
out_signature="a{oa{sv}}")
3437
2070
def GetAllClientsWithProperties(self):
3439
2072
return dbus.Dictionary(
3440
{c.dbus_object_path: c.GetAll(
3441
"se.recompile.Mandos.Client")
3442
for c in tcp_server.clients.values()},
2073
((c.dbus_object_path, c.GetAll(""))
2074
for c in tcp_server.clients),
3443
2075
signature="oa{sv}")
3445
2077
@dbus.service.method(_interface, in_signature="o")
3446
2078
def RemoveClient(self, object_path):
3448
for c in tcp_server.clients.values():
2080
for c in tcp_server.clients:
3449
2081
if c.dbus_object_path == object_path:
3450
del tcp_server.clients[c.name]
2082
tcp_server.clients.remove(c)
3451
2083
c.remove_from_connection()
3452
# Don't signal the disabling
2084
# Don't signal anything except ClientRemoved
3453
2085
c.disable(quiet=True)
3454
# Emit D-Bus signal for removal
3455
self.client_removed_signal(c)
2087
self.ClientRemoved(object_path, c.name)
3457
2089
raise KeyError(object_path)
3461
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3462
out_signature="a{oa{sa{sv}}}")
3463
def GetManagedObjects(self):
3465
return dbus.Dictionary(
3466
{client.dbus_object_path:
3468
{interface: client.GetAll(interface)
3470
client._get_all_interface_names()})
3471
for client in tcp_server.clients.values()})
3473
def client_added_signal(self, client):
3474
"""Send the new standard signal and the old signal"""
3476
# New standard signal
3477
self.InterfacesAdded(
3478
client.dbus_object_path,
3480
{interface: client.GetAll(interface)
3482
client._get_all_interface_names()}))
3484
self.ClientAdded(client.dbus_object_path)
3486
def client_removed_signal(self, client):
3487
"""Send the new standard signal and the old signal"""
3489
# New standard signal
3490
self.InterfacesRemoved(
3491
client.dbus_object_path,
3492
client._get_all_interface_names())
3494
self.ClientRemoved(client.dbus_object_path,
3497
mandos_dbus_service = MandosDBusService()
3499
# Save modules to variables to exempt the modules from being
3500
# unloaded before the function registered with atexit() is run.
3501
mp = multiprocessing
2093
class MandosDBusServiceTransitional(MandosDBusService):
2094
__metaclass__ = AlternateDBusNamesMetaclass
2095
mandos_dbus_service = MandosDBusServiceTransitional()
3505
2098
"Cleanup function; run on exit"
3509
mp.active_children()
3511
if not (tcp_server.clients or client_settings):
3514
# Store client before exiting. Secrets are encrypted with key
3515
# based on what config file has. If config file is
3516
# removed/edited, old secret will thus be unrecovable.
3518
with PGPEngine() as pgp:
3519
for client in tcp_server.clients.values():
3520
key = client_settings[client.name]["secret"]
3521
client.encrypted_secret = pgp.encrypt(client.secret,
3525
# A list of attributes that can not be pickled
3527
exclude = {"bus", "changedstate", "secret",
3528
"checker", "server_settings"}
3529
for name, typ in inspect.getmembers(dbus.service
3533
client_dict["encrypted_secret"] = (client
3535
for attr in client.client_structure:
3536
if attr not in exclude:
3537
client_dict[attr] = getattr(client, attr)
3539
clients[client.name] = client_dict
3540
del client_settings[client.name]["secret"]
3543
with tempfile.NamedTemporaryFile(
3547
dir=os.path.dirname(stored_state_path),
3548
delete=False) as stored_state:
3549
pickle.dump((clients, client_settings), stored_state,
3551
tempname = stored_state.name
3552
os.rename(tempname, stored_state_path)
3553
except (IOError, OSError) as e:
3559
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3560
logger.warning("Could not save persistent state: {}"
3561
.format(os.strerror(e.errno)))
3563
logger.warning("Could not save persistent state:",
3567
# Delete all clients, and settings from config
3568
2101
while tcp_server.clients:
3569
name, client = tcp_server.clients.popitem()
2102
client = tcp_server.clients.pop()
3571
2104
client.remove_from_connection()
3572
# Don't signal the disabling
2105
client.disable_hook = None
2106
# Don't signal anything except ClientRemoved
3573
2107
client.disable(quiet=True)
3574
# Emit D-Bus signal for removal
3576
mandos_dbus_service.client_removed_signal(client)
3577
client_settings.clear()
2110
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
3579
2113
atexit.register(cleanup)
3581
for client in tcp_server.clients.values():
2115
for client in tcp_server.clients:
3583
# Emit D-Bus signal for adding
3584
mandos_dbus_service.client_added_signal(client)
3585
# Need to initiate checking of clients
3587
client.init_checker()
2118
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3589
2121
tcp_server.enable()
3590
2122
tcp_server.server_activate()
3592
2124
# Find out what port we got
3594
service.port = tcp_server.socket.getsockname()[1]
2125
service.port = tcp_server.socket.getsockname()[1]
3596
2127
logger.info("Now listening on address %r, port %d,"
3597
" flowinfo %d, scope_id %d",
3598
*tcp_server.socket.getsockname())
2128
" flowinfo %d, scope_id %d"
2129
% tcp_server.socket.getsockname())
3600
logger.info("Now listening on address %r, port %d",
3601
*tcp_server.socket.getsockname())
3603
# service.interface = tcp_server.socket.getsockname()[3]
2131
logger.info("Now listening on address %r, port %d"
2132
% tcp_server.socket.getsockname())
2134
#service.interface = tcp_server.socket.getsockname()[3]
3607
# From the Avahi example code
3610
except dbus.exceptions.DBusException as error:
3611
logger.critical("D-Bus Exception", exc_info=error)
3614
# End of Avahi example code
3617
GLib.IOChannel.unix_new(tcp_server.fileno()),
3618
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
3619
lambda *args, **kwargs: (tcp_server.handle_request
3620
(*args[2:], **kwargs) or True))
2137
# From the Avahi example code
2140
except dbus.exceptions.DBusException as error:
2141
logger.critical("DBusException: %s", error)
2144
# End of Avahi example code
2146
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2147
lambda *args, **kwargs:
2148
(tcp_server.handle_request
2149
(*args[2:], **kwargs) or True))
3622
2151
logger.debug("Starting main loop")
3623
2152
main_loop.run()
3624
2153
except AvahiError as error:
3625
logger.critical("Avahi Error", exc_info=error)
2154
logger.critical("AvahiError: %s", error)
3628
2157
except KeyboardInterrupt: