70
import cPickle as pickle
63
import cPickle as pickle
73
64
import multiprocessing
85
69
import dbus.service
87
from gi.repository import GLib
88
72
from dbus.mainloop.glib import DBusGMainLoop
91
75
import xml.dom.minidom
94
if sys.version_info.major == 2:
98
# Add collections.abc.Callable if it does not exist
100
collections.abc.Callable
101
except AttributeError:
103
Callable = collections.Callable
104
collections.abc = abc
107
# Add shlex.quote if it does not exist
110
except AttributeError:
111
shlex.quote = re.escape
113
# Show warnings by default
114
if not sys.warnoptions:
116
warnings.simplefilter("default")
118
# Try to find the value of SO_BINDTODEVICE:
120
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
121
# newer, and it is also the most natural place for it:
77
import Crypto.Cipher.AES
122
80
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
123
81
except AttributeError:
125
# This is where SO_BINDTODEVICE was up to and including Python
127
83
from IN import SO_BINDTODEVICE
128
84
except ImportError:
129
# In Python 2.7 it seems to have been removed entirely.
130
# Try running the C preprocessor:
132
cc = subprocess.Popen(["cc", "--language=c", "-E",
134
stdin=subprocess.PIPE,
135
stdout=subprocess.PIPE)
136
stdout = cc.communicate(
137
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
138
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
139
except (OSError, ValueError, IndexError):
141
SO_BINDTODEVICE = None
143
if sys.version_info < (3, 2):
144
configparser.Configparser = configparser.SafeConfigParser
147
stored_state_file = "clients.pickle"
85
SO_BINDTODEVICE = None
149
90
logger = logging.getLogger()
150
logging.captureWarnings(True) # Show warnings via the logging system
154
if_nametoindex = ctypes.cdll.LoadLibrary(
155
ctypes.util.find_library("c")).if_nametoindex
156
except (OSError, AttributeError):
158
def if_nametoindex(interface):
159
"Get an interface index the hard way, i.e. using fcntl()"
160
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
161
with contextlib.closing(socket.socket()) as s:
162
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
163
struct.pack(b"16s16x", interface))
164
interface_index = struct.unpack("I", ifreq[16:20])[0]
165
return interface_index
168
def copy_function(func):
169
"""Make a copy of a function"""
170
if sys.version_info.major == 2:
171
return types.FunctionType(func.func_code,
177
return types.FunctionType(func.__code__,
184
def initlogger(debug, level=logging.WARNING):
185
"""init logger and add loglevel"""
188
syslogger = (logging.handlers.SysLogHandler(
189
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
191
syslogger.setFormatter(logging.Formatter
192
('Mandos [%(process)d]: %(levelname)s:'
194
logger.addHandler(syslogger)
197
console = logging.StreamHandler()
198
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
202
logger.addHandler(console)
203
logger.setLevel(level)
206
class PGPError(Exception):
207
"""Exception if encryption/decryption fails"""
212
"""A simple class for OpenPGP symmetric encryption & decryption"""
215
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
218
output = subprocess.check_output(["gpgconf"])
219
for line in output.splitlines():
220
name, text, path = line.split(b":")
225
if e.errno != errno.ENOENT:
227
self.gnupgargs = ['--batch',
228
'--homedir', self.tempdir,
231
# Only GPG version 1 has the --no-use-agent option.
232
if self.gpg == b"gpg" or self.gpg.endswith(b"/gpg"):
233
self.gnupgargs.append("--no-use-agent")
238
def __exit__(self, exc_type, exc_value, traceback):
246
if self.tempdir is not None:
247
# Delete contents of tempdir
248
for root, dirs, files in os.walk(self.tempdir,
250
for filename in files:
251
os.remove(os.path.join(root, filename))
253
os.rmdir(os.path.join(root, dirname))
255
os.rmdir(self.tempdir)
258
def password_encode(self, password):
259
# Passphrase can not be empty and can not contain newlines or
260
# NUL bytes. So we prefix it and hex encode it.
261
encoded = b"mandos" + binascii.hexlify(password)
262
if len(encoded) > 2048:
263
# GnuPG can't handle long passwords, so encode differently
264
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
265
.replace(b"\n", b"\\n")
266
.replace(b"\0", b"\\x00"))
269
def encrypt(self, data, password):
270
passphrase = self.password_encode(password)
271
with tempfile.NamedTemporaryFile(
272
dir=self.tempdir) as passfile:
273
passfile.write(passphrase)
275
proc = subprocess.Popen([self.gpg, '--symmetric',
279
stdin=subprocess.PIPE,
280
stdout=subprocess.PIPE,
281
stderr=subprocess.PIPE)
282
ciphertext, err = proc.communicate(input=data)
283
if proc.returncode != 0:
287
def decrypt(self, data, password):
288
passphrase = self.password_encode(password)
289
with tempfile.NamedTemporaryFile(
290
dir=self.tempdir) as passfile:
291
passfile.write(passphrase)
293
proc = subprocess.Popen([self.gpg, '--decrypt',
297
stdin=subprocess.PIPE,
298
stdout=subprocess.PIPE,
299
stderr=subprocess.PIPE)
300
decrypted_plaintext, err = proc.communicate(input=data)
301
if proc.returncode != 0:
303
return decrypted_plaintext
306
# Pretend that we have an Avahi module
308
"""This isn't so much a class as it is a module-like namespace."""
309
IF_UNSPEC = -1 # avahi-common/address.h
310
PROTO_UNSPEC = -1 # avahi-common/address.h
311
PROTO_INET = 0 # avahi-common/address.h
312
PROTO_INET6 = 1 # avahi-common/address.h
313
DBUS_NAME = "org.freedesktop.Avahi"
314
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
315
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
316
DBUS_PATH_SERVER = "/"
319
def string_array_to_txt_array(t):
320
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
321
for s in t), signature="ay")
322
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
323
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
324
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
325
SERVER_INVALID = 0 # avahi-common/defs.h
326
SERVER_REGISTERING = 1 # avahi-common/defs.h
327
SERVER_RUNNING = 2 # avahi-common/defs.h
328
SERVER_COLLISION = 3 # avahi-common/defs.h
329
SERVER_FAILURE = 4 # avahi-common/defs.h
91
stored_state_path = "/var/lib/mandos/clients.pickle"
93
syslogger = (logging.handlers.SysLogHandler
94
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
95
address = str("/dev/log")))
96
syslogger.setFormatter(logging.Formatter
97
('Mandos [%(process)d]: %(levelname)s:'
99
logger.addHandler(syslogger)
101
console = logging.StreamHandler()
102
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
106
logger.addHandler(console)
332
109
class AvahiError(Exception):
333
110
def __init__(self, value, *args, **kwargs):
334
111
self.value = value
335
return super(AvahiError, self).__init__(value, *args,
112
super(AvahiError, self).__init__(value, *args, **kwargs)
113
def __unicode__(self):
114
return unicode(repr(self.value))
339
116
class AvahiServiceError(AvahiError):
343
119
class AvahiGroupError(AvahiError):
123
class AvahiService(object):
348
124
"""An Avahi (Zeroconf) service.
351
127
interface: integer; avahi.IF_UNSPEC or an interface index.
352
128
Used to optionally bind to the specified interface.
353
129
name: string; Example: 'Mandos'
354
130
type: string; Example: '_mandos._tcp'.
355
See <https://www.iana.org/assignments/service-names-port-numbers>
131
See <http://www.dns-sd.org/ServiceTypes.html>
356
132
port: integer; what port to announce
357
133
TXT: list of strings; TXT record for the service
358
134
domain: string; Domain to publish on, default to .local if empty.
517
263
follow_name_owner_changes=True),
518
264
avahi.DBUS_INTERFACE_SERVER)
519
265
self.server.connect_to_signal("StateChanged",
520
self.server_state_changed)
266
self.server_state_changed)
521
267
self.server_state_changed(self.server.GetState())
524
269
class AvahiServiceToSyslog(AvahiService):
525
def rename(self, *args, **kwargs):
526
271
"""Add the new name to the syslog messages"""
527
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
528
syslogger.setFormatter(logging.Formatter(
529
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
272
ret = AvahiService.rename(self)
273
syslogger.setFormatter(logging.Formatter
274
('Mandos (%s) [%%(process)d]:'
275
' %%(levelname)s: %%(message)s'
534
# Pretend that we have a GnuTLS module
536
"""This isn't so much a class as it is a module-like namespace."""
538
library = ctypes.util.find_library("gnutls")
540
library = ctypes.util.find_library("gnutls-deb0")
541
_library = ctypes.cdll.LoadLibrary(library)
544
# Unless otherwise indicated, the constants and types below are
545
# all from the gnutls/gnutls.h C header file.
556
E_NO_CERTIFICATE_FOUND = -49
561
KEYID_USE_SHA256 = 1 # gnutls/x509.h
562
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
565
class session_int(ctypes.Structure):
567
session_t = ctypes.POINTER(session_int)
569
class certificate_credentials_st(ctypes.Structure):
571
certificate_credentials_t = ctypes.POINTER(
572
certificate_credentials_st)
573
certificate_type_t = ctypes.c_int
575
class datum_t(ctypes.Structure):
576
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
577
('size', ctypes.c_uint)]
579
class openpgp_crt_int(ctypes.Structure):
581
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
582
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
583
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
584
credentials_type_t = ctypes.c_int
585
transport_ptr_t = ctypes.c_void_p
586
close_request_t = ctypes.c_int
589
class Error(Exception):
590
def __init__(self, message=None, code=None, args=()):
591
# Default usage is by a message string, but if a return
592
# code is passed, convert it to a string with
595
if message is None and code is not None:
596
message = gnutls.strerror(code)
597
return super(gnutls.Error, self).__init__(
600
class CertificateSecurityError(Error):
606
self._c_object = gnutls.certificate_credentials_t()
607
gnutls.certificate_allocate_credentials(
608
ctypes.byref(self._c_object))
609
self.type = gnutls.CRD_CERTIFICATE
612
gnutls.certificate_free_credentials(self._c_object)
615
def __init__(self, socket, credentials=None):
616
self._c_object = gnutls.session_t()
617
gnutls_flags = gnutls.CLIENT
618
if gnutls.check_version(b"3.5.6"):
619
gnutls_flags |= gnutls.NO_TICKETS
621
gnutls_flags |= gnutls.ENABLE_RAWPK
622
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
624
gnutls.set_default_priority(self._c_object)
625
gnutls.transport_set_ptr(self._c_object, socket.fileno())
626
gnutls.handshake_set_private_extensions(self._c_object,
629
if credentials is None:
630
credentials = gnutls.Credentials()
631
gnutls.credentials_set(self._c_object, credentials.type,
632
ctypes.cast(credentials._c_object,
634
self.credentials = credentials
637
gnutls.deinit(self._c_object)
640
return gnutls.handshake(self._c_object)
642
def send(self, data):
646
data_len -= gnutls.record_send(self._c_object,
651
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
653
# Error handling functions
654
def _error_code(result):
655
"""A function to raise exceptions on errors, suitable
656
for the 'restype' attribute on ctypes functions"""
659
if result == gnutls.E_NO_CERTIFICATE_FOUND:
660
raise gnutls.CertificateSecurityError(code=result)
661
raise gnutls.Error(code=result)
663
def _retry_on_error(result, func, arguments):
664
"""A function to retry on some errors, suitable
665
for the 'errcheck' attribute on ctypes functions"""
667
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
668
return _error_code(result)
669
result = func(*arguments)
672
# Unless otherwise indicated, the function declarations below are
673
# all from the gnutls/gnutls.h C header file.
676
priority_set_direct = _library.gnutls_priority_set_direct
677
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
678
ctypes.POINTER(ctypes.c_char_p)]
679
priority_set_direct.restype = _error_code
681
init = _library.gnutls_init
682
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
683
init.restype = _error_code
685
set_default_priority = _library.gnutls_set_default_priority
686
set_default_priority.argtypes = [session_t]
687
set_default_priority.restype = _error_code
689
record_send = _library.gnutls_record_send
690
record_send.argtypes = [session_t, ctypes.c_void_p,
692
record_send.restype = ctypes.c_ssize_t
693
record_send.errcheck = _retry_on_error
695
certificate_allocate_credentials = (
696
_library.gnutls_certificate_allocate_credentials)
697
certificate_allocate_credentials.argtypes = [
698
ctypes.POINTER(certificate_credentials_t)]
699
certificate_allocate_credentials.restype = _error_code
701
certificate_free_credentials = (
702
_library.gnutls_certificate_free_credentials)
703
certificate_free_credentials.argtypes = [
704
certificate_credentials_t]
705
certificate_free_credentials.restype = None
707
handshake_set_private_extensions = (
708
_library.gnutls_handshake_set_private_extensions)
709
handshake_set_private_extensions.argtypes = [session_t,
711
handshake_set_private_extensions.restype = None
713
credentials_set = _library.gnutls_credentials_set
714
credentials_set.argtypes = [session_t, credentials_type_t,
716
credentials_set.restype = _error_code
718
strerror = _library.gnutls_strerror
719
strerror.argtypes = [ctypes.c_int]
720
strerror.restype = ctypes.c_char_p
722
certificate_type_get = _library.gnutls_certificate_type_get
723
certificate_type_get.argtypes = [session_t]
724
certificate_type_get.restype = _error_code
726
certificate_get_peers = _library.gnutls_certificate_get_peers
727
certificate_get_peers.argtypes = [session_t,
728
ctypes.POINTER(ctypes.c_uint)]
729
certificate_get_peers.restype = ctypes.POINTER(datum_t)
731
global_set_log_level = _library.gnutls_global_set_log_level
732
global_set_log_level.argtypes = [ctypes.c_int]
733
global_set_log_level.restype = None
735
global_set_log_function = _library.gnutls_global_set_log_function
736
global_set_log_function.argtypes = [log_func]
737
global_set_log_function.restype = None
739
deinit = _library.gnutls_deinit
740
deinit.argtypes = [session_t]
741
deinit.restype = None
743
handshake = _library.gnutls_handshake
744
handshake.argtypes = [session_t]
745
handshake.restype = _error_code
746
handshake.errcheck = _retry_on_error
748
transport_set_ptr = _library.gnutls_transport_set_ptr
749
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
750
transport_set_ptr.restype = None
752
bye = _library.gnutls_bye
753
bye.argtypes = [session_t, close_request_t]
754
bye.restype = _error_code
755
bye.errcheck = _retry_on_error
757
check_version = _library.gnutls_check_version
758
check_version.argtypes = [ctypes.c_char_p]
759
check_version.restype = ctypes.c_char_p
761
_need_version = b"3.3.0"
762
if check_version(_need_version) is None:
763
raise self.Error("Needs GnuTLS {} or later"
764
.format(_need_version))
766
_tls_rawpk_version = b"3.6.6"
767
has_rawpk = bool(check_version(_tls_rawpk_version))
771
class pubkey_st(ctypes.Structure):
773
pubkey_t = ctypes.POINTER(pubkey_st)
775
x509_crt_fmt_t = ctypes.c_int
777
# All the function declarations below are from gnutls/abstract.h
778
pubkey_init = _library.gnutls_pubkey_init
779
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
780
pubkey_init.restype = _error_code
782
pubkey_import = _library.gnutls_pubkey_import
783
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
785
pubkey_import.restype = _error_code
787
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
788
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
789
ctypes.POINTER(ctypes.c_ubyte),
790
ctypes.POINTER(ctypes.c_size_t)]
791
pubkey_get_key_id.restype = _error_code
793
pubkey_deinit = _library.gnutls_pubkey_deinit
794
pubkey_deinit.argtypes = [pubkey_t]
795
pubkey_deinit.restype = None
797
# All the function declarations below are from gnutls/openpgp.h
799
openpgp_crt_init = _library.gnutls_openpgp_crt_init
800
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
801
openpgp_crt_init.restype = _error_code
803
openpgp_crt_import = _library.gnutls_openpgp_crt_import
804
openpgp_crt_import.argtypes = [openpgp_crt_t,
805
ctypes.POINTER(datum_t),
807
openpgp_crt_import.restype = _error_code
809
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
810
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
811
ctypes.POINTER(ctypes.c_uint)]
812
openpgp_crt_verify_self.restype = _error_code
814
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
815
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
816
openpgp_crt_deinit.restype = None
818
openpgp_crt_get_fingerprint = (
819
_library.gnutls_openpgp_crt_get_fingerprint)
820
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
824
openpgp_crt_get_fingerprint.restype = _error_code
826
if check_version(b"3.6.4"):
827
certificate_type_get2 = _library.gnutls_certificate_type_get2
828
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
829
certificate_type_get2.restype = _error_code
831
# Remove non-public functions
832
del _error_code, _retry_on_error
835
def call_pipe(connection, # : multiprocessing.Connection
836
func, *args, **kwargs):
837
"""This function is meant to be called by multiprocessing.Process
839
This function runs func(*args, **kwargs), and writes the resulting
840
return value on the provided multiprocessing.Connection.
842
connection.send(func(*args, **kwargs))
279
def _timedelta_to_milliseconds(td):
280
"Convert a datetime.timedelta() to milliseconds"
281
return ((td.days * 24 * 60 * 60 * 1000)
282
+ (td.seconds * 1000)
283
+ (td.microseconds // 1000))
285
class Client(object):
847
286
"""A representation of a client host served by this server.
850
approved: bool(); 'None' if not yet approved/disapproved
289
_approved: bool(); 'None' if not yet approved/disapproved
851
290
approval_delay: datetime.timedelta(); Time to wait for approval
852
291
approval_duration: datetime.timedelta(); Duration of one approval
853
checker: multiprocessing.Process(); a running checker process used
854
to see if the client lives. 'None' if no process is
856
checker_callback_tag: a GLib event source tag, or None
292
checker: subprocess.Popen(); a running checker process used
293
to see if the client lives.
294
'None' if no process is running.
295
checker_callback_tag: a gobject event source tag, or None
857
296
checker_command: string; External command which is run to check
858
297
if client lives. %() expansions are done at
859
298
runtime with vars(self) as dict, so that for
860
299
instance %(name)s can be used in the command.
861
checker_initiator_tag: a GLib event source tag, or None
300
checker_initiator_tag: a gobject event source tag, or None
862
301
created: datetime.datetime(); (UTC) object creation
863
302
client_structure: Object describing what attributes a client has
864
303
and is used for storing the client at exit
865
304
current_checker_command: string; current running checker_command
866
disable_initiator_tag: a GLib event source tag, or None
305
disable_initiator_tag: a gobject event source tag, or None
868
307
fingerprint: string (40 or 32 hexadecimal digits); used to
869
uniquely identify an OpenPGP client
870
key_id: string (64 hexadecimal digits); used to uniquely identify
871
a client using raw public keys
308
uniquely identify the client
872
309
host: string; available for use by the checker command
873
310
interval: datetime.timedelta(); How often to start a new checker
874
311
last_approval_request: datetime.datetime(); (UTC) or None
875
312
last_checked_ok: datetime.datetime(); (UTC) or None
876
last_checker_status: integer between 0 and 255 reflecting exit
877
status of last checker. -1 reflects crashed
878
checker, -2 means no checker completed yet.
879
last_checker_signal: The signal which killed the last checker, if
880
last_checker_status is -1
881
last_enabled: datetime.datetime(); (UTC) or None
313
last_checker_status: integer between 0 and 255 reflecting exit status
314
of last checker. -1 reflect crashed checker,
316
last_enabled: datetime.datetime(); (UTC)
882
317
name: string; from the config file, used in log messages and
883
318
D-Bus identifiers
884
319
secret: bytestring; sent verbatim (over TLS) to client
885
320
timeout: datetime.timedelta(); How long from last_checked_ok
886
321
until this client is disabled
887
extended_timeout: extra long timeout when secret has been sent
322
extended_timeout: extra long timeout when password has been sent
888
323
runtime_expansions: Allowed attributes for runtime expansion.
889
324
expires: datetime.datetime(); time (UTC) when a client will be
890
325
disabled, or None
891
server_settings: The server_settings dict from main()
894
328
runtime_expansions = ("approval_delay", "approval_duration",
895
"created", "enabled", "expires", "key_id",
896
"fingerprint", "host", "interval",
897
"last_approval_request", "last_checked_ok",
329
"created", "enabled", "fingerprint",
330
"host", "interval", "last_checked_ok",
898
331
"last_enabled", "name", "timeout")
901
"extended_timeout": "PT15M",
903
"checker": "fping -q -- %%(host)s",
905
"approval_delay": "PT0S",
906
"approval_duration": "PT1S",
907
"approved_by_default": "True",
912
def config_parser(config):
913
"""Construct a new dict of client settings of this form:
914
{ client_name: {setting_name: value, ...}, ...}
915
with exceptions for any special settings as defined above.
916
NOTE: Must be a pure function. Must return the same result
917
value given the same arguments.
920
for client_name in config.sections():
921
section = dict(config.items(client_name))
922
client = settings[client_name] = {}
924
client["host"] = section["host"]
925
# Reformat values from string types to Python types
926
client["approved_by_default"] = config.getboolean(
927
client_name, "approved_by_default")
928
client["enabled"] = config.getboolean(client_name,
931
# Uppercase and remove spaces from key_id and fingerprint
932
# for later comparison purposes with return value from the
933
# key_id() and fingerprint() functions
934
client["key_id"] = (section.get("key_id", "").upper()
936
client["fingerprint"] = (section["fingerprint"].upper()
938
if "secret" in section:
939
client["secret"] = codecs.decode(section["secret"]
942
elif "secfile" in section:
943
with open(os.path.expanduser(os.path.expandvars
944
(section["secfile"])),
946
client["secret"] = secfile.read()
948
raise TypeError("No secret or secfile for section {}"
950
client["timeout"] = string_to_delta(section["timeout"])
951
client["extended_timeout"] = string_to_delta(
952
section["extended_timeout"])
953
client["interval"] = string_to_delta(section["interval"])
954
client["approval_delay"] = string_to_delta(
955
section["approval_delay"])
956
client["approval_duration"] = string_to_delta(
957
section["approval_duration"])
958
client["checker_command"] = section["checker"]
959
client["last_approval_request"] = None
960
client["last_checked_ok"] = None
961
client["last_checker_status"] = -2
965
def __init__(self, settings, name=None, server_settings=None):
333
def timeout_milliseconds(self):
334
"Return the 'timeout' attribute in milliseconds"
335
return _timedelta_to_milliseconds(self.timeout)
337
def extended_timeout_milliseconds(self):
338
"Return the 'extended_timeout' attribute in milliseconds"
339
return _timedelta_to_milliseconds(self.extended_timeout)
341
def interval_milliseconds(self):
342
"Return the 'interval' attribute in milliseconds"
343
return _timedelta_to_milliseconds(self.interval)
345
def approval_delay_milliseconds(self):
346
return _timedelta_to_milliseconds(self.approval_delay)
348
def __init__(self, name = None, config=None):
349
"""Note: the 'checker' key in 'config' sets the
350
'checker_command' attribute and *not* the 'checker'
967
if server_settings is None:
969
self.server_settings = server_settings
970
# adding all client settings
971
for setting, value in settings.items():
972
setattr(self, setting, value)
975
if not hasattr(self, "last_enabled"):
976
self.last_enabled = datetime.datetime.utcnow()
977
if not hasattr(self, "expires"):
978
self.expires = (datetime.datetime.utcnow()
981
self.last_enabled = None
984
355
logger.debug("Creating client %r", self.name)
985
logger.debug(" Key ID: %s", self.key_id)
356
# Uppercase and remove spaces from fingerprint for later
357
# comparison purposes with return value from the fingerprint()
359
self.fingerprint = (config["fingerprint"].upper()
986
361
logger.debug(" Fingerprint: %s", self.fingerprint)
987
self.created = settings.get("created",
988
datetime.datetime.utcnow())
990
# attributes specific for this server instance
362
if "secret" in config:
363
self.secret = config["secret"].decode("base64")
364
elif "secfile" in config:
365
with open(os.path.expanduser(os.path.expandvars
366
(config["secfile"])),
368
self.secret = secfile.read()
370
raise TypeError("No secret or secfile for client %s"
372
self.host = config.get("host", "")
373
self.created = datetime.datetime.utcnow()
375
self.last_approval_request = None
376
self.last_enabled = datetime.datetime.utcnow()
377
self.last_checked_ok = None
378
self.last_checker_status = None
379
self.timeout = string_to_delta(config["timeout"])
380
self.extended_timeout = string_to_delta(config
381
["extended_timeout"])
382
self.interval = string_to_delta(config["interval"])
991
383
self.checker = None
992
384
self.checker_initiator_tag = None
993
385
self.disable_initiator_tag = None
386
self.expires = datetime.datetime.utcnow() + self.timeout
994
387
self.checker_callback_tag = None
388
self.checker_command = config["checker"]
995
389
self.current_checker_command = None
390
self._approved = None
391
self.approved_by_default = config.get("approved_by_default",
997
393
self.approvals_pending = 0
998
self.changedstate = multiprocessing_manager.Condition(
999
multiprocessing_manager.Lock())
1000
self.client_structure = [attr
1001
for attr in self.__dict__.keys()
1002
if not attr.startswith("_")]
394
self.approval_delay = string_to_delta(
395
config["approval_delay"])
396
self.approval_duration = string_to_delta(
397
config["approval_duration"])
398
self.changedstate = (multiprocessing_manager
399
.Condition(multiprocessing_manager
401
self.client_structure = [attr for attr in self.__dict__.iterkeys() if not attr.startswith("_")]
1003
402
self.client_structure.append("client_structure")
1005
for name, t in inspect.getmembers(
1006
type(self), lambda obj: isinstance(obj, property)):
405
for name, t in inspect.getmembers(type(self),
406
lambda obj: isinstance(obj, property)):
1007
407
if not name.startswith("_"):
1008
408
self.client_structure.append(name)
1010
410
# Send notice to process children that client state has changed
1011
411
def send_changedstate(self):
1012
412
with self.changedstate:
1013
413
self.changedstate.notify_all()
1015
415
def enable(self):
1016
416
"""Start this client's checker and timeout hooks"""
1017
417
if getattr(self, "enabled", False):
1018
418
# Already enabled
420
self.send_changedstate()
1020
421
self.expires = datetime.datetime.utcnow() + self.timeout
1021
422
self.enabled = True
1022
423
self.last_enabled = datetime.datetime.utcnow()
1023
424
self.init_checker()
1024
self.send_changedstate()
1026
426
def disable(self, quiet=True):
1027
427
"""Disable this client."""
1028
428
if not getattr(self, "enabled", False):
431
self.send_changedstate()
1031
433
logger.info("Disabling client %s", self.name)
1032
if getattr(self, "disable_initiator_tag", None) is not None:
1033
GLib.source_remove(self.disable_initiator_tag)
434
if getattr(self, "disable_initiator_tag", False):
435
gobject.source_remove(self.disable_initiator_tag)
1034
436
self.disable_initiator_tag = None
1035
437
self.expires = None
1036
if getattr(self, "checker_initiator_tag", None) is not None:
1037
GLib.source_remove(self.checker_initiator_tag)
438
if getattr(self, "checker_initiator_tag", False):
439
gobject.source_remove(self.checker_initiator_tag)
1038
440
self.checker_initiator_tag = None
1039
441
self.stop_checker()
1040
442
self.enabled = False
1042
self.send_changedstate()
1043
# Do not run this again if called by a GLib.timeout_add
443
# Do not run this again if called by a gobject.timeout_add
1046
446
def __del__(self):
1049
449
def init_checker(self):
1050
450
# Schedule a new checker to be started an 'interval' from now,
1051
451
# and every interval from then on.
1052
if self.checker_initiator_tag is not None:
1053
GLib.source_remove(self.checker_initiator_tag)
1054
self.checker_initiator_tag = GLib.timeout_add(
1055
random.randrange(int(self.interval.total_seconds() * 1000
452
self.checker_initiator_tag = (gobject.timeout_add
453
(self.interval_milliseconds(),
1058
455
# Schedule a disable() when 'timeout' has passed
1059
if self.disable_initiator_tag is not None:
1060
GLib.source_remove(self.disable_initiator_tag)
1061
self.disable_initiator_tag = GLib.timeout_add(
1062
int(self.timeout.total_seconds() * 1000), self.disable)
456
self.disable_initiator_tag = (gobject.timeout_add
457
(self.timeout_milliseconds(),
1063
459
# Also start a new checker *right now*.
1064
460
self.start_checker()
1066
def checker_callback(self, source, condition, connection,
463
def checker_callback(self, pid, condition, command):
1068
464
"""The checker has completed, so take appropriate actions."""
1069
# Read return code from connection (see call_pipe)
1070
returncode = connection.recv()
1072
if self.checker is not None:
1074
465
self.checker_callback_tag = None
1075
466
self.checker = None
1078
self.last_checker_status = returncode
1079
self.last_checker_signal = None
467
if os.WIFEXITED(condition):
468
self.last_checker_status = os.WEXITSTATUS(condition)
1080
469
if self.last_checker_status == 0:
1081
470
logger.info("Checker for %(name)s succeeded",
1083
472
self.checked_ok()
1085
logger.info("Checker for %(name)s failed", vars(self))
474
logger.info("Checker for %(name)s failed",
1087
477
self.last_checker_status = -1
1088
self.last_checker_signal = -returncode
1089
478
logger.warning("Checker for %(name)s crashed?",
1093
def checked_ok(self):
1094
"""Assert that the client has been seen, alive and well."""
1095
self.last_checked_ok = datetime.datetime.utcnow()
1096
self.last_checker_status = 0
1097
self.last_checker_signal = None
1100
def bump_timeout(self, timeout=None):
1101
"""Bump up the timeout for this client."""
481
def checked_ok(self, timeout=None):
482
"""Bump up the timeout for this client.
484
This should only be called when the client has been seen,
1102
487
if timeout is None:
1103
488
timeout = self.timeout
489
self.last_checked_ok = datetime.datetime.utcnow()
1104
490
if self.disable_initiator_tag is not None:
1105
GLib.source_remove(self.disable_initiator_tag)
1106
self.disable_initiator_tag = None
491
gobject.source_remove(self.disable_initiator_tag)
1107
492
if getattr(self, "enabled", False):
1108
self.disable_initiator_tag = GLib.timeout_add(
1109
int(timeout.total_seconds() * 1000), self.disable)
493
self.disable_initiator_tag = (gobject.timeout_add
494
(_timedelta_to_milliseconds
495
(timeout), self.disable))
1110
496
self.expires = datetime.datetime.utcnow() + timeout
1112
498
def need_approval(self):
1113
499
self.last_approval_request = datetime.datetime.utcnow()
1115
501
def start_checker(self):
1116
502
"""Start a new checker subprocess if one is not running.
1118
504
If a checker already exists, leave it running and do
1120
506
# The reason for not killing a running checker is that if we
1121
# did that, and if a checker (for some reason) started running
1122
# slowly and taking more than 'interval' time, then the client
1123
# would inevitably timeout, since no checker would get a
1124
# chance to run to completion. If we instead leave running
507
# did that, then if a checker (for some reason) started
508
# running slowly and taking more than 'interval' time, the
509
# client would inevitably timeout, since no checker would get
510
# a chance to run to completion. If we instead leave running
1125
511
# checkers alone, the checker would have to take more time
1126
512
# than 'timeout' for the client to be disabled, which is as it
1129
if self.checker is not None and not self.checker.is_alive():
1130
logger.warning("Checker was not alive; joining")
515
# If a checker exists, make sure it is not a zombie
517
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
518
except (AttributeError, OSError) as error:
519
if (isinstance(error, OSError)
520
and error.errno != errno.ECHILD):
524
logger.warning("Checker was a zombie")
525
gobject.source_remove(self.checker_callback_tag)
526
self.checker_callback(pid, status,
527
self.current_checker_command)
1133
528
# Start a new checker if needed
1134
529
if self.checker is None:
1135
# Escape attributes for the shell
1137
attr: shlex.quote(str(getattr(self, attr)))
1138
for attr in self.runtime_expansions}
1140
command = self.checker_command % escaped_attrs
1141
except TypeError as error:
1142
logger.error('Could not format string "%s"',
1143
self.checker_command,
1145
return True # Try again later
531
# In case checker_command has exactly one % operator
532
command = self.checker_command % self.host
534
# Escape attributes for the shell
535
escaped_attrs = dict(
537
re.escape(unicode(str(getattr(self, attr, "")),
541
self.runtime_expansions)
544
command = self.checker_command % escaped_attrs
545
except TypeError as error:
546
logger.error('Could not format string "%s":'
547
' %s', self.checker_command, error)
548
return True # Try again later
1146
549
self.current_checker_command = command
1147
logger.info("Starting checker %r for %s", command,
1149
# We don't need to redirect stdout and stderr, since
1150
# in normal mode, that is already done by daemon(),
1151
# and in debug mode we don't want to. (Stdin is
1152
# always replaced by /dev/null.)
1153
# The exception is when not debugging but nevertheless
1154
# running in the foreground; use the previously
1156
popen_args = {"close_fds": True,
1159
if (not self.server_settings["debug"]
1160
and self.server_settings["foreground"]):
1161
popen_args.update({"stdout": wnull,
1163
pipe = multiprocessing.Pipe(duplex=False)
1164
self.checker = multiprocessing.Process(
1166
args=(pipe[1], subprocess.call, command),
1168
self.checker.start()
1169
self.checker_callback_tag = GLib.io_add_watch(
1170
GLib.IOChannel.unix_new(pipe[0].fileno()),
1171
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
1172
self.checker_callback, pipe[0], command)
1173
# Re-run this periodically if run by GLib.timeout_add
551
logger.info("Starting checker %r for %s",
553
# We don't need to redirect stdout and stderr, since
554
# in normal mode, that is already done by daemon(),
555
# and in debug mode we don't want to. (Stdin is
556
# always replaced by /dev/null.)
557
self.checker = subprocess.Popen(command,
560
self.checker_callback_tag = (gobject.child_watch_add
562
self.checker_callback,
564
# The checker may have completed before the gobject
565
# watch was added. Check for this.
566
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
568
gobject.source_remove(self.checker_callback_tag)
569
self.checker_callback(pid, status, command)
570
except OSError as error:
571
logger.error("Failed to start subprocess: %s",
573
# Re-run this periodically if run by gobject.timeout_add
1176
576
def stop_checker(self):
1177
577
"""Force the checker process, if any, to stop."""
1178
578
if self.checker_callback_tag:
1179
GLib.source_remove(self.checker_callback_tag)
579
gobject.source_remove(self.checker_callback_tag)
1180
580
self.checker_callback_tag = None
1181
581
if getattr(self, "checker", None) is None:
1183
583
logger.debug("Stopping checker for %(name)s", vars(self))
1184
self.checker.terminate()
585
os.kill(self.checker.pid, signal.SIGTERM)
587
#if self.checker.poll() is None:
588
# os.kill(self.checker.pid, signal.SIGKILL)
589
except OSError as error:
590
if error.errno != errno.ESRCH: # No such process
1185
592
self.checker = None
1188
def dbus_service_property(dbus_interface,
594
# Encrypts a client secret and stores it in a varible encrypted_secret
595
def encrypt_secret(self, key):
596
# Encryption-key need to be of a specific size, so we hash inputed key
597
hasheng = hashlib.sha256()
599
encryptionkey = hasheng.digest()
601
# Create validation hash so we know at decryption if it was sucessful
602
hasheng = hashlib.sha256()
603
hasheng.update(self.secret)
604
validationhash = hasheng.digest()
607
iv = os.urandom(Crypto.Cipher.AES.block_size)
608
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
609
Crypto.Cipher.AES.MODE_CFB, iv)
610
ciphertext = ciphereng.encrypt(validationhash+self.secret)
611
self.encrypted_secret = (ciphertext, iv)
613
# Decrypt a encrypted client secret
614
def decrypt_secret(self, key):
615
# Decryption-key need to be of a specific size, so we hash inputed key
616
hasheng = hashlib.sha256()
618
encryptionkey = hasheng.digest()
620
# Decrypt encrypted secret
621
ciphertext, iv = self.encrypted_secret
622
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
623
Crypto.Cipher.AES.MODE_CFB, iv)
624
plain = ciphereng.decrypt(ciphertext)
626
# Validate decrypted secret to know if it was succesful
627
hasheng = hashlib.sha256()
628
validationhash = plain[:hasheng.digest_size]
629
secret = plain[hasheng.digest_size:]
630
hasheng.update(secret)
632
# if validation fails, we use key as new secret. Otherwhise, we use
633
# the decrypted secret
634
if hasheng.digest() == validationhash:
638
del self.encrypted_secret
641
def dbus_service_property(dbus_interface, signature="v",
642
access="readwrite", byte_arrays=False):
1192
643
"""Decorators for marking methods of a DBusObjectWithProperties to
1193
644
become properties on the D-Bus.
1195
646
The decorated method will be called with no arguments by "Get"
1196
647
and with one argument by "Set".
1198
649
The parameters, where they are supported, are the same as
1199
650
dbus.service.method, except there is only "signature", since the
1200
651
type from Get() and the type sent to Set() is the same.
1532
821
except (AttributeError, xml.dom.DOMException,
1533
822
xml.parsers.expat.ExpatError) as error:
1534
823
logger.error("Failed to override Introspection method",
1540
dbus.OBJECT_MANAGER_IFACE
1541
except AttributeError:
1542
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1545
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1546
"""A D-Bus object with an ObjectManager.
1548
Classes inheriting from this exposes the standard
1549
GetManagedObjects call and the InterfacesAdded and
1550
InterfacesRemoved signals on the standard
1551
"org.freedesktop.DBus.ObjectManager" interface.
1553
Note: No signals are sent automatically; they must be sent
1556
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1557
out_signature="a{oa{sa{sv}}}")
1558
def GetManagedObjects(self):
1559
"""This function must be overridden"""
1560
raise NotImplementedError()
1562
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1563
signature="oa{sa{sv}}")
1564
def InterfacesAdded(self, object_path, interfaces_and_properties):
1567
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1568
def InterfacesRemoved(self, object_path, interfaces):
1571
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1573
path_keyword='object_path',
1574
connection_keyword='connection')
1575
def Introspect(self, object_path, connection):
1576
"""Overloading of standard D-Bus method.
1578
Override return argument name of GetManagedObjects to be
1579
"objpath_interfaces_and_properties"
1581
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1585
document = xml.dom.minidom.parseString(xmlstring)
1587
for if_tag in document.getElementsByTagName("interface"):
1588
# Fix argument name for the GetManagedObjects method
1589
if (if_tag.getAttribute("name")
1590
== dbus.OBJECT_MANAGER_IFACE):
1591
for cn in if_tag.getElementsByTagName("method"):
1592
if (cn.getAttribute("name")
1593
== "GetManagedObjects"):
1594
for arg in cn.getElementsByTagName("arg"):
1595
if (arg.getAttribute("direction")
1599
"objpath_interfaces"
1601
xmlstring = document.toxml("utf-8")
1603
except (AttributeError, xml.dom.DOMException,
1604
xml.parsers.expat.ExpatError) as error:
1605
logger.error("Failed to override Introspection method",
1610
def datetime_to_dbus(dt, variant_level=0):
828
def datetime_to_dbus (dt, variant_level=0):
1611
829
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1613
return dbus.String("", variant_level=variant_level)
1614
return dbus.String(dt.isoformat(), variant_level=variant_level)
1617
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1618
"""A class decorator; applied to a subclass of
1619
dbus.service.Object, it will add alternate D-Bus attributes with
1620
interface names according to the "alt_interface_names" mapping.
1623
@alternate_dbus_interfaces({"org.example.Interface":
1624
"net.example.AlternateInterface"})
1625
class SampleDBusObject(dbus.service.Object):
1626
@dbus.service.method("org.example.Interface")
1627
def SampleDBusMethod():
1630
The above "SampleDBusMethod" on "SampleDBusObject" will be
1631
reachable via two interfaces: "org.example.Interface" and
1632
"net.example.AlternateInterface", the latter of which will have
1633
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1634
"true", unless "deprecate" is passed with a False value.
1636
This works for methods and signals, and also for D-Bus properties
1637
(from DBusObjectWithProperties) and interfaces (from the
1638
dbus_interface_annotations decorator).
831
return dbus.String("", variant_level = variant_level)
832
return dbus.String(dt.isoformat(),
833
variant_level=variant_level)
835
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
837
"""Applied to an empty subclass of a D-Bus object, this metaclass
838
will add additional D-Bus attributes matching a certain pattern.
1642
for orig_interface_name, alt_interface_name in (
1643
alt_interface_names.items()):
1645
interface_names = set()
1646
# Go though all attributes of the class
1647
for attrname, attribute in inspect.getmembers(cls):
840
def __new__(mcs, name, bases, attr):
841
# Go through all the base classes which could have D-Bus
842
# methods, signals, or properties in them
843
for base in (b for b in bases
844
if issubclass(b, dbus.service.Object)):
845
# Go though all attributes of the base class
846
for attrname, attribute in inspect.getmembers(base):
1648
847
# Ignore non-D-Bus attributes, and D-Bus attributes
1649
848
# with the wrong interface name
1650
849
if (not hasattr(attribute, "_dbus_interface")
1651
or not attribute._dbus_interface.startswith(
1652
orig_interface_name)):
850
or not attribute._dbus_interface
851
.startswith("se.recompile.Mandos")):
1654
853
# Create an alternate D-Bus interface name based on
1655
854
# the current name
1656
alt_interface = attribute._dbus_interface.replace(
1657
orig_interface_name, alt_interface_name)
1658
interface_names.add(alt_interface)
855
alt_interface = (attribute._dbus_interface
856
.replace("se.recompile.Mandos",
857
"se.bsnet.fukt.Mandos"))
1659
858
# Is this a D-Bus signal?
1660
859
if getattr(attribute, "_dbus_is_signal", False):
1661
# Extract the original non-method undecorated
1662
# function by black magic
1663
if sys.version_info.major == 2:
1664
nonmethod_func = (dict(
860
# Extract the original non-method function by
862
nonmethod_func = (dict(
1665
863
zip(attribute.func_code.co_freevars,
1666
attribute.__closure__))
1667
["func"].cell_contents)
1669
nonmethod_func = (dict(
1670
zip(attribute.__code__.co_freevars,
1671
attribute.__closure__))
1672
["func"].cell_contents)
864
attribute.__closure__))["func"]
1673
866
# Create a new, but exactly alike, function
1674
867
# object, and decorate it to be a new D-Bus signal
1675
868
# with the alternate D-Bus interface name
1676
new_function = copy_function(nonmethod_func)
1677
new_function = (dbus.service.signal(
1679
attribute._dbus_signature)(new_function))
1680
# Copy annotations, if any
1682
new_function._dbus_annotations = dict(
1683
attribute._dbus_annotations)
1684
except AttributeError:
869
new_function = (dbus.service.signal
871
attribute._dbus_signature)
873
nonmethod_func.func_code,
874
nonmethod_func.func_globals,
875
nonmethod_func.func_name,
876
nonmethod_func.func_defaults,
877
nonmethod_func.func_closure)))
1687
878
# Define a creator of a function to call both the
1688
# original and alternate functions, so both the
1689
# original and alternate signals gets sent when
1690
# the function is called
879
# old and new functions, so both the old and new
880
# signals gets sent when the function is called
1691
881
def fixscope(func1, func2):
1692
882
"""This function is a scope container to pass
1693
883
func1 and func2 to the "call_both" function
1694
884
outside of its arguments"""
1696
@functools.wraps(func2)
1697
885
def call_both(*args, **kwargs):
1698
886
"""This function will emit two D-Bus
1699
887
signals by calling func1 and func2"""
1700
888
func1(*args, **kwargs)
1701
889
func2(*args, **kwargs)
1702
# Make wrapper function look like a D-Bus
1704
for name, attr in inspect.getmembers(func2):
1705
if name.startswith("_dbus_"):
1706
setattr(call_both, name, attr)
1708
890
return call_both
1709
891
# Create the "call_both" function and add it to
1711
attr[attrname] = fixscope(attribute, new_function)
893
attr[attrname] = fixscope(attribute,
1712
895
# Is this a D-Bus method?
1713
896
elif getattr(attribute, "_dbus_is_method", False):
1714
897
# Create a new, but exactly alike, function
1715
898
# object. Decorate it to be a new D-Bus method
1716
899
# with the alternate D-Bus interface name. Add it
1719
dbus.service.method(
1721
attribute._dbus_in_signature,
1722
attribute._dbus_out_signature)
1723
(copy_function(attribute)))
1724
# Copy annotations, if any
1726
attr[attrname]._dbus_annotations = dict(
1727
attribute._dbus_annotations)
1728
except AttributeError:
901
attr[attrname] = (dbus.service.method
903
attribute._dbus_in_signature,
904
attribute._dbus_out_signature)
906
(attribute.func_code,
907
attribute.func_globals,
909
attribute.func_defaults,
910
attribute.func_closure)))
1730
911
# Is this a D-Bus property?
1731
912
elif getattr(attribute, "_dbus_is_property", False):
1732
913
# Create a new, but exactly alike, function
1733
914
# object, and decorate it to be a new D-Bus
1734
915
# property with the alternate D-Bus interface
1735
916
# name. Add it to the class.
1736
attr[attrname] = (dbus_service_property(
1737
alt_interface, attribute._dbus_signature,
1738
attribute._dbus_access,
1739
attribute._dbus_get_args_options
1741
(copy_function(attribute)))
1742
# Copy annotations, if any
1744
attr[attrname]._dbus_annotations = dict(
1745
attribute._dbus_annotations)
1746
except AttributeError:
1748
# Is this a D-Bus interface?
1749
elif getattr(attribute, "_dbus_is_interface", False):
1750
# Create a new, but exactly alike, function
1751
# object. Decorate it to be a new D-Bus interface
1752
# with the alternate D-Bus interface name. Add it
1755
dbus_interface_annotations(alt_interface)
1756
(copy_function(attribute)))
1758
# Deprecate all alternate interfaces
1759
iname = "_AlternateDBusNames_interface_annotation{}"
1760
for interface_name in interface_names:
1762
@dbus_interface_annotations(interface_name)
1764
return {"org.freedesktop.DBus.Deprecated":
1766
# Find an unused name
1767
for aname in (iname.format(i)
1768
for i in itertools.count()):
1769
if aname not in attr:
1773
# Replace the class with a new subclass of it with
1774
# methods, signals, etc. as created above.
1775
if sys.version_info.major == 2:
1776
cls = type(b"{}Alternate".format(cls.__name__),
1779
cls = type("{}Alternate".format(cls.__name__),
1786
@alternate_dbus_interfaces({"se.recompile.Mandos":
1787
"se.bsnet.fukt.Mandos"})
917
attr[attrname] = (dbus_service_property
919
attribute._dbus_signature,
920
attribute._dbus_access,
922
._dbus_get_args_options
925
(attribute.func_code,
926
attribute.func_globals,
928
attribute.func_defaults,
929
attribute.func_closure)))
930
return type.__new__(mcs, name, bases, attr)
1788
932
class ClientDBus(Client, DBusObjectWithProperties):
1789
933
"""A Client class using D-Bus
1792
936
dbus_object_path: dbus.ObjectPath
1793
937
bus: dbus.SystemBus()
1796
940
runtime_expansions = (Client.runtime_expansions
1797
+ ("dbus_object_path", ))
1799
_interface = "se.recompile.Mandos.Client"
941
+ ("dbus_object_path",))
1801
943
# dbus.service.Object doesn't use super(), so we can't either.
1803
def __init__(self, bus=None, *args, **kwargs):
945
def __init__(self, bus = None, *args, **kwargs):
1805
947
Client.__init__(self, *args, **kwargs)
949
self._approvals_pending = 0
1806
950
# Only now, when this client is initialized, can it show up on
1808
client_object_name = str(self.name).translate(
952
client_object_name = unicode(self.name).translate(
1809
953
{ord("."): ord("_"),
1810
954
ord("-"): ord("_")})
1811
self.dbus_object_path = dbus.ObjectPath(
1812
"/clients/" + client_object_name)
955
self.dbus_object_path = (dbus.ObjectPath
956
("/clients/" + client_object_name))
1813
957
DBusObjectWithProperties.__init__(self, self.bus,
1814
958
self.dbus_object_path)
1816
def notifychangeproperty(transform_func, dbus_name,
1817
type_func=lambda x: x,
1819
invalidate_only=False,
1820
_interface=_interface):
960
def notifychangeproperty(transform_func,
961
dbus_name, type_func=lambda x: x,
1821
963
""" Modify a variable so that it's a property which announces
1822
964
its changes to DBus.
2217
1324
self.start_checker()
2219
1326
self.stop_checker()
2221
1328
# ObjectPath - property
2223
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2224
"org.freedesktop.DBus.Deprecated": "true"})
2225
1329
@dbus_service_property(_interface, signature="o", access="read")
2226
1330
def ObjectPath_dbus_property(self):
2227
return self.dbus_object_path # is already a dbus.ObjectPath
1331
return self.dbus_object_path # is already a dbus.ObjectPath
2229
1333
# Secret = property
2231
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2233
@dbus_service_property(_interface,
1334
@dbus_service_property(_interface, signature="ay",
1335
access="write", byte_arrays=True)
2237
1336
def Secret_dbus_property(self, value):
2238
self.secret = bytes(value)
1337
self.secret = str(value)
2244
def __init__(self, child_pipe, key_id, fpr, address):
1342
class ProxyClient(object):
1343
def __init__(self, child_pipe, fpr, address):
2245
1344
self._pipe = child_pipe
2246
self._pipe.send(('init', key_id, fpr, address))
1345
self._pipe.send(('init', fpr, address))
2247
1346
if not self._pipe.recv():
2248
raise KeyError(key_id or fpr)
2250
1349
def __getattribute__(self, name):
1350
if(name == '_pipe'):
2252
1351
return super(ProxyClient, self).__getattribute__(name)
2253
1352
self._pipe.send(('getattr', name))
2254
1353
data = self._pipe.recv()
2255
1354
if data[0] == 'data':
2257
1356
if data[0] == 'function':
2259
1357
def func(*args, **kwargs):
2260
1358
self._pipe.send(('funcall', name, args, kwargs))
2261
1359
return self._pipe.recv()[1]
2265
1362
def __setattr__(self, name, value):
1363
if(name == '_pipe'):
2267
1364
return super(ProxyClient, self).__setattr__(name, value)
2268
1365
self._pipe.send(('setattr', name, value))
1367
class ClientDBusTransitional(ClientDBus):
1368
__metaclass__ = AlternateDBusNamesMetaclass
2271
1370
class ClientHandler(socketserver.BaseRequestHandler, object):
2272
1371
"""A class to handle client connections.
2274
1373
Instantiated once for each connection to handle it.
2275
1374
Note: This will run in its own forked process."""
2277
1376
def handle(self):
2278
1377
with contextlib.closing(self.server.child_pipe) as child_pipe:
2279
1378
logger.info("TCP connection from: %s",
2280
str(self.client_address))
1379
unicode(self.client_address))
2281
1380
logger.debug("Pipe FD: %d",
2282
1381
self.server.child_pipe.fileno())
2284
session = gnutls.ClientSession(self.request)
2286
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2287
# "+AES-256-CBC", "+SHA1",
2288
# "+COMP-NULL", "+CTYPE-OPENPGP",
1383
session = (gnutls.connection
1384
.ClientSession(self.request,
1386
.X509Credentials()))
1388
# Note: gnutls.connection.X509Credentials is really a
1389
# generic GnuTLS certificate credentials object so long as
1390
# no X.509 keys are added to it. Therefore, we can use it
1391
# here despite using OpenPGP certificates.
1393
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1394
# "+AES-256-CBC", "+SHA1",
1395
# "+COMP-NULL", "+CTYPE-OPENPGP",
2290
1397
# Use a fallback default, since this MUST be set.
2291
1398
priority = self.server.gnutls_priority
2292
1399
if priority is None:
2293
1400
priority = "NORMAL"
2294
gnutls.priority_set_direct(session._c_object,
2295
priority.encode("utf-8"),
1401
(gnutls.library.functions
1402
.gnutls_priority_set_direct(session._c_object,
2298
1405
# Start communication using the Mandos protocol
2299
1406
# Get protocol number
2300
1407
line = self.request.makefile().readline()
2301
1408
logger.debug("Protocol version: %r", line)
2303
1410
if int(line.strip().split()[0]) > 1:
2304
raise RuntimeError(line)
2305
1412
except (ValueError, IndexError, RuntimeError) as error:
2306
1413
logger.error("Unknown protocol version: %s", error)
2309
1416
# Start GnuTLS connection
2311
1418
session.handshake()
2312
except gnutls.Error as error:
1419
except gnutls.errors.GNUTLSError as error:
2313
1420
logger.warning("Handshake failed: %s", error)
2314
1421
# Do not run session.bye() here: the session is not
2315
1422
# established. Just abandon the request.
2317
1424
logger.debug("Handshake succeeded")
2319
1426
approval_required = False
2321
if gnutls.has_rawpk:
2324
key_id = self.key_id(
2325
self.peer_certificate(session))
2326
except (TypeError, gnutls.Error) as error:
2327
logger.warning("Bad certificate: %s", error)
2329
logger.debug("Key ID: %s", key_id)
2334
fpr = self.fingerprint(
2335
self.peer_certificate(session))
2336
except (TypeError, gnutls.Error) as error:
2337
logger.warning("Bad certificate: %s", error)
2339
logger.debug("Fingerprint: %s", fpr)
2342
client = ProxyClient(child_pipe, key_id, fpr,
1429
fpr = self.fingerprint(self.peer_certificate
1432
gnutls.errors.GNUTLSError) as error:
1433
logger.warning("Bad certificate: %s", error)
1435
logger.debug("Fingerprint: %s", fpr)
1436
if self.server.use_dbus:
1438
client.NewRequest(str(self.client_address))
1441
client = ProxyClient(child_pipe, fpr,
2343
1442
self.client_address)
2344
1443
except KeyError:
2347
1446
if client.approval_delay:
2348
1447
delay = client.approval_delay
2349
1448
client.approvals_pending += 1
2350
1449
approval_required = True
2353
1452
if not client.enabled:
2354
1453
logger.info("Client %s is disabled",
2356
1455
if self.server.use_dbus:
2357
1456
# Emit D-Bus signal
2358
1457
client.Rejected("Disabled")
2361
if client.approved or not client.approval_delay:
2362
# We are approved or approval is disabled
1460
if client._approved or not client.approval_delay:
1461
#We are approved or approval is disabled
2364
elif client.approved is None:
1463
elif client._approved is None:
2365
1464
logger.info("Client %s needs approval",
2367
1466
if self.server.use_dbus:
2368
1467
# Emit D-Bus signal
2369
1468
client.NeedApproval(
2370
client.approval_delay.total_seconds()
2371
* 1000, client.approved_by_default)
1469
client.approval_delay_milliseconds(),
1470
client.approved_by_default)
2373
1472
logger.warning("Client %s was not approved",
2398
1499
delay -= time2 - time
2401
session.send(client.secret)
2402
except gnutls.Error as error:
2403
logger.warning("gnutls send failed",
1502
while sent_size < len(client.secret):
1504
sent = session.send(client.secret[sent_size:])
1505
except gnutls.errors.GNUTLSError as error:
1506
logger.warning("gnutls send failed")
1508
logger.debug("Sent: %d, remaining: %d",
1509
sent, len(client.secret)
1510
- (sent_size + sent))
2407
1513
logger.info("Sending secret to %s", client.name)
2408
1514
# bump the timeout using extended_timeout
2409
client.bump_timeout(client.extended_timeout)
1515
client.checked_ok(client.extended_timeout)
2410
1516
if self.server.use_dbus:
2411
1517
# Emit D-Bus signal
2412
1518
client.GotSecret()
2415
1521
if approval_required:
2416
1522
client.approvals_pending -= 1
2419
except gnutls.Error as error:
2420
logger.warning("GnuTLS bye failed",
1525
except gnutls.errors.GNUTLSError as error:
1526
logger.warning("GnuTLS bye failed")
2424
1529
def peer_certificate(session):
2425
"Return the peer's certificate as a bytestring"
2427
cert_type = gnutls.certificate_type_get2(session._c_object,
2429
except AttributeError:
2430
cert_type = gnutls.certificate_type_get(session._c_object)
2431
if gnutls.has_rawpk:
2432
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2434
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2435
# If not a valid certificate type...
2436
if cert_type not in valid_cert_types:
2437
logger.info("Cert type %r not in %r", cert_type,
2439
# ...return invalid data
1530
"Return the peer's OpenPGP certificate as a bytestring"
1531
# If not an OpenPGP certificate...
1532
if (gnutls.library.functions
1533
.gnutls_certificate_type_get(session._c_object)
1534
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1535
# ...do the normal thing
1536
return session.peer_certificate
2441
1537
list_size = ctypes.c_uint(1)
2442
cert_list = (gnutls.certificate_get_peers
1538
cert_list = (gnutls.library.functions
1539
.gnutls_certificate_get_peers
2443
1540
(session._c_object, ctypes.byref(list_size)))
2444
1541
if not bool(cert_list) and list_size.value != 0:
2445
raise gnutls.Error("error getting peer certificate")
1542
raise gnutls.errors.GNUTLSError("error getting peer"
2446
1544
if list_size.value == 0:
2448
1546
cert = cert_list[0]
2449
1547
return ctypes.string_at(cert.data, cert.size)
2452
def key_id(certificate):
2453
"Convert a certificate bytestring to a hexdigit key ID"
2454
# New GnuTLS "datum" with the public key
2455
datum = gnutls.datum_t(
2456
ctypes.cast(ctypes.c_char_p(certificate),
2457
ctypes.POINTER(ctypes.c_ubyte)),
2458
ctypes.c_uint(len(certificate)))
2459
# XXX all these need to be created in the gnutls "module"
2460
# New empty GnuTLS certificate
2461
pubkey = gnutls.pubkey_t()
2462
gnutls.pubkey_init(ctypes.byref(pubkey))
2463
# Import the raw public key into the certificate
2464
gnutls.pubkey_import(pubkey,
2465
ctypes.byref(datum),
2466
gnutls.X509_FMT_DER)
2467
# New buffer for the key ID
2468
buf = ctypes.create_string_buffer(32)
2469
buf_len = ctypes.c_size_t(len(buf))
2470
# Get the key ID from the raw public key into the buffer
2471
gnutls.pubkey_get_key_id(pubkey,
2472
gnutls.KEYID_USE_SHA256,
2473
ctypes.cast(ctypes.byref(buf),
2474
ctypes.POINTER(ctypes.c_ubyte)),
2475
ctypes.byref(buf_len))
2476
# Deinit the certificate
2477
gnutls.pubkey_deinit(pubkey)
2479
# Convert the buffer to a Python bytestring
2480
key_id = ctypes.string_at(buf, buf_len.value)
2481
# Convert the bytestring to hexadecimal notation
2482
hex_key_id = binascii.hexlify(key_id).upper()
2486
1550
def fingerprint(openpgp):
2487
1551
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2488
1552
# New GnuTLS "datum" with the OpenPGP public key
2489
datum = gnutls.datum_t(
2490
ctypes.cast(ctypes.c_char_p(openpgp),
2491
ctypes.POINTER(ctypes.c_ubyte)),
2492
ctypes.c_uint(len(openpgp)))
1553
datum = (gnutls.library.types
1554
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1557
ctypes.c_uint(len(openpgp))))
2493
1558
# New empty GnuTLS certificate
2494
crt = gnutls.openpgp_crt_t()
2495
gnutls.openpgp_crt_init(ctypes.byref(crt))
1559
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1560
(gnutls.library.functions
1561
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2496
1562
# Import the OpenPGP public key into the certificate
2497
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2498
gnutls.OPENPGP_FMT_RAW)
1563
(gnutls.library.functions
1564
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1565
gnutls.library.constants
1566
.GNUTLS_OPENPGP_FMT_RAW))
2499
1567
# Verify the self signature in the key
2500
1568
crtverify = ctypes.c_uint()
2501
gnutls.openpgp_crt_verify_self(crt, 0,
2502
ctypes.byref(crtverify))
1569
(gnutls.library.functions
1570
.gnutls_openpgp_crt_verify_self(crt, 0,
1571
ctypes.byref(crtverify)))
2503
1572
if crtverify.value != 0:
2504
gnutls.openpgp_crt_deinit(crt)
2505
raise gnutls.CertificateSecurityError(code
1573
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1574
raise (gnutls.errors.CertificateSecurityError
2507
1576
# New buffer for the fingerprint
2508
1577
buf = ctypes.create_string_buffer(20)
2509
1578
buf_len = ctypes.c_size_t()
2510
1579
# Get the fingerprint from the certificate into the buffer
2511
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2512
ctypes.byref(buf_len))
1580
(gnutls.library.functions
1581
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1582
ctypes.byref(buf_len)))
2513
1583
# Deinit the certificate
2514
gnutls.openpgp_crt_deinit(crt)
1584
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2515
1585
# Convert the buffer to a Python bytestring
2516
1586
fpr = ctypes.string_at(buf, buf_len.value)
2517
1587
# Convert the bytestring to hexadecimal notation
2518
hex_fpr = binascii.hexlify(fpr).upper()
1588
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2522
class MultiprocessingMixIn:
1592
class MultiprocessingMixIn(object):
2523
1593
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2525
1594
def sub_process_main(self, request, address):
2527
1596
self.finish_request(request, address)
2529
1598
self.handle_error(request, address)
2530
1599
self.close_request(request)
2532
1601
def process_request(self, request, address):
2533
1602
"""Start a new process to process the request."""
2534
proc = multiprocessing.Process(target=self.sub_process_main,
2535
args=(request, address))
1603
proc = multiprocessing.Process(target = self.sub_process_main,
2540
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
1610
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2541
1611
""" adds a pipe to the MixIn """
2543
1612
def process_request(self, request, client_address):
2544
1613
"""Overrides and wraps the original process_request().
2546
1615
This function creates a new pipe in self.pipe
2548
1617
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2550
1619
proc = MultiprocessingMixIn.process_request(self, request,
2551
1620
client_address)
2552
1621
self.child_pipe.close()
2553
1622
self.add_pipe(parent_pipe, proc)
2555
1624
def add_pipe(self, parent_pipe, proc):
2556
1625
"""Dummy function; override as necessary"""
2557
raise NotImplementedError()
1626
raise NotImplementedError
2560
1629
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2561
socketserver.TCPServer):
1630
socketserver.TCPServer, object):
2562
1631
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2565
1634
enabled: Boolean; whether this server is activated yet
2566
1635
interface: None or a network interface name (string)
2567
1636
use_ipv6: Boolean; to use IPv6 or not
2570
1638
def __init__(self, server_address, RequestHandlerClass,
2574
"""If socketfd is set, use that file descriptor instead of
2575
creating a new one with socket.socket().
1639
interface=None, use_ipv6=True):
2577
1640
self.interface = interface
2579
1642
self.address_family = socket.AF_INET6
2580
if socketfd is not None:
2581
# Save the file descriptor
2582
self.socketfd = socketfd
2583
# Save the original socket.socket() function
2584
self.socket_socket = socket.socket
2586
# To implement --socket, we monkey patch socket.socket.
2588
# (When socketserver.TCPServer is a new-style class, we
2589
# could make self.socket into a property instead of monkey
2590
# patching socket.socket.)
2592
# Create a one-time-only replacement for socket.socket()
2593
@functools.wraps(socket.socket)
2594
def socket_wrapper(*args, **kwargs):
2595
# Restore original function so subsequent calls are
2597
socket.socket = self.socket_socket
2598
del self.socket_socket
2599
# This time only, return a new socket object from the
2600
# saved file descriptor.
2601
return socket.fromfd(self.socketfd, *args, **kwargs)
2602
# Replace socket.socket() function with wrapper
2603
socket.socket = socket_wrapper
2604
# The socketserver.TCPServer.__init__ will call
2605
# socket.socket(), which might be our replacement,
2606
# socket_wrapper(), if socketfd was set.
2607
1643
socketserver.TCPServer.__init__(self, server_address,
2608
1644
RequestHandlerClass)
2610
1645
def server_bind(self):
2611
1646
"""This overrides the normal server_bind() function
2612
1647
to bind to an interface if one was specified, and also NOT to
2613
1648
bind to an address or port if they were not specified."""
2614
global SO_BINDTODEVICE
2615
1649
if self.interface is not None:
2616
1650
if SO_BINDTODEVICE is None:
2617
# Fall back to a hard-coded value which seems to be
2619
logger.warning("SO_BINDTODEVICE not found, trying 25")
2620
SO_BINDTODEVICE = 25
2622
self.socket.setsockopt(
2623
socket.SOL_SOCKET, SO_BINDTODEVICE,
2624
(self.interface + "\0").encode("utf-8"))
2625
except socket.error as error:
2626
if error.errno == errno.EPERM:
2627
logger.error("No permission to bind to"
2628
" interface %s", self.interface)
2629
elif error.errno == errno.ENOPROTOOPT:
2630
logger.error("SO_BINDTODEVICE not available;"
2631
" cannot bind to interface %s",
2633
elif error.errno == errno.ENODEV:
2634
logger.error("Interface %s does not exist,"
2635
" cannot bind", self.interface)
1651
logger.error("SO_BINDTODEVICE does not exist;"
1652
" cannot bind to interface %s",
1656
self.socket.setsockopt(socket.SOL_SOCKET,
1660
except socket.error as error:
1661
if error[0] == errno.EPERM:
1662
logger.error("No permission to"
1663
" bind to interface %s",
1665
elif error[0] == errno.ENOPROTOOPT:
1666
logger.error("SO_BINDTODEVICE not available;"
1667
" cannot bind to interface %s",
2638
1671
# Only bind(2) the socket if we really need to.
2639
1672
if self.server_address[0] or self.server_address[1]:
2640
if self.server_address[1]:
2641
self.allow_reuse_address = True
2642
1673
if not self.server_address[0]:
2643
1674
if self.address_family == socket.AF_INET6:
2644
any_address = "::" # in6addr_any
1675
any_address = "::" # in6addr_any
2646
any_address = "0.0.0.0" # INADDR_ANY
1677
any_address = socket.INADDR_ANY
2647
1678
self.server_address = (any_address,
2648
1679
self.server_address[1])
2649
1680
elif not self.server_address[1]:
2650
self.server_address = (self.server_address[0], 0)
1681
self.server_address = (self.server_address[0],
2651
1683
# if self.interface:
2652
1684
# self.server_address = (self.server_address[0],
2980
1930
parser.add_argument("--no-dbus", action="store_false",
2981
1931
dest="use_dbus", help="Do not provide D-Bus"
2982
" system bus interface", default=None)
1932
" system bus interface")
2983
1933
parser.add_argument("--no-ipv6", action="store_false",
2984
dest="use_ipv6", help="Do not use IPv6",
1934
dest="use_ipv6", help="Do not use IPv6")
2986
1935
parser.add_argument("--no-restore", action="store_false",
2987
dest="restore", help="Do not restore stored"
2988
" state", default=None)
2989
parser.add_argument("--socket", type=int,
2990
help="Specify a file descriptor to a network"
2991
" socket to use instead of creating one")
2992
parser.add_argument("--statedir", metavar="DIR",
2993
help="Directory to save/restore state in")
2994
parser.add_argument("--foreground", action="store_true",
2995
help="Run in foreground", default=None)
2996
parser.add_argument("--no-zeroconf", action="store_false",
2997
dest="zeroconf", help="Do not use Zeroconf",
1936
dest="restore", help="Do not restore stored state",
3000
1939
options = parser.parse_args()
3002
1946
# Default values for config file for server-global settings
3003
if gnutls.has_rawpk:
3004
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
3005
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
3007
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
3008
":+SIGN-DSA-SHA256")
3009
server_defaults = {"interface": "",
3013
"priority": priority,
3014
"servicename": "Mandos",
3020
"statedir": "/var/lib/mandos",
3021
"foreground": "False",
1947
server_defaults = { "interface": "",
1952
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1953
"servicename": "Mandos",
3026
1959
# Parse config file for server-global settings
3027
server_config = configparser.ConfigParser(server_defaults)
1960
server_config = configparser.SafeConfigParser(server_defaults)
3028
1961
del server_defaults
3029
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3030
# Convert the ConfigParser object to a dict
1962
server_config.read(os.path.join(options.configdir,
1964
# Convert the SafeConfigParser object to a dict
3031
1965
server_settings = server_config.defaults()
3032
1966
# Use the appropriate methods on the non-string config options
3033
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3034
"foreground", "zeroconf"):
1967
for option in ("debug", "use_dbus", "use_ipv6"):
3035
1968
server_settings[option] = server_config.getboolean("DEFAULT",
3037
1970
if server_settings["port"]:
3038
1971
server_settings["port"] = server_config.getint("DEFAULT",
3040
if server_settings["socket"]:
3041
server_settings["socket"] = server_config.getint("DEFAULT",
3043
# Later, stdin will, and stdout and stderr might, be dup'ed
3044
# over with an opened os.devnull. But we don't want this to
3045
# happen with a supplied network socket.
3046
if 0 <= server_settings["socket"] <= 2:
3047
server_settings["socket"] = os.dup(server_settings
3049
1973
del server_config
3051
1975
# Override the settings from the config file with command line
3052
1976
# options, if set.
3053
1977
for option in ("interface", "address", "port", "debug",
3054
"priority", "servicename", "configdir", "use_dbus",
3055
"use_ipv6", "debuglevel", "restore", "statedir",
3056
"socket", "foreground", "zeroconf"):
1978
"priority", "servicename", "configdir",
1979
"use_dbus", "use_ipv6", "debuglevel", "restore"):
3057
1980
value = getattr(options, option)
3058
1981
if value is not None:
3059
1982
server_settings[option] = value
3061
1984
# Force all strings to be unicode
3062
1985
for option in server_settings.keys():
3063
if isinstance(server_settings[option], bytes):
3064
server_settings[option] = (server_settings[option]
3066
# Force all boolean options to be boolean
3067
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3068
"foreground", "zeroconf"):
3069
server_settings[option] = bool(server_settings[option])
3070
# Debug implies foreground
3071
if server_settings["debug"]:
3072
server_settings["foreground"] = True
1986
if type(server_settings[option]) is str:
1987
server_settings[option] = unicode(server_settings[option])
3073
1988
# Now we have our good server settings in "server_settings"
3075
1990
##################################################################
3077
if (not server_settings["zeroconf"]
3078
and not (server_settings["port"]
3079
or server_settings["socket"] != "")):
3080
parser.error("Needs port or socket to work without Zeroconf")
3082
1992
# For convenience
3083
1993
debug = server_settings["debug"]
3084
1994
debuglevel = server_settings["debuglevel"]
3085
1995
use_dbus = server_settings["use_dbus"]
3086
1996
use_ipv6 = server_settings["use_ipv6"]
3087
stored_state_path = os.path.join(server_settings["statedir"],
3089
foreground = server_settings["foreground"]
3090
zeroconf = server_settings["zeroconf"]
3093
initlogger(debug, logging.DEBUG)
3098
level = getattr(logging, debuglevel.upper())
3099
initlogger(debug, level)
3101
1998
if server_settings["servicename"] != "Mandos":
3102
syslogger.setFormatter(
3103
logging.Formatter('Mandos ({}) [%(process)d]:'
3104
' %(levelname)s: %(message)s'.format(
3105
server_settings["servicename"])))
1999
syslogger.setFormatter(logging.Formatter
2000
('Mandos (%s) [%%(process)d]:'
2001
' %%(levelname)s: %%(message)s'
2002
% server_settings["servicename"]))
3107
2004
# Parse config file with clients
3108
client_config = configparser.ConfigParser(Client.client_defaults)
2005
client_defaults = { "timeout": "5m",
2006
"extended_timeout": "15m",
2008
"checker": "fping -q -- %%(host)s",
2010
"approval_delay": "0s",
2011
"approval_duration": "1s",
2013
client_config = configparser.SafeConfigParser(client_defaults)
3109
2014
client_config.read(os.path.join(server_settings["configdir"],
3110
2015
"clients.conf"))
3112
2017
global mandos_dbus_service
3113
2018
mandos_dbus_service = None
3116
if server_settings["socket"] != "":
3117
socketfd = server_settings["socket"]
3118
tcp_server = MandosServer(
3119
(server_settings["address"], server_settings["port"]),
3121
interface=(server_settings["interface"] or None),
3123
gnutls_priority=server_settings["priority"],
3127
pidfilename = "/run/mandos.pid"
3128
if not os.path.isdir("/run/."):
3129
pidfilename = "/var/run/mandos.pid"
3132
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3133
except IOError as e:
3134
logger.error("Could not open file %r", pidfilename,
3137
for name, group in (("_mandos", "_mandos"),
3138
("mandos", "mandos"),
3139
("nobody", "nogroup")):
3141
uid = pwd.getpwnam(name).pw_uid
3142
gid = pwd.getpwnam(group).pw_gid
2020
tcp_server = MandosServer((server_settings["address"],
2021
server_settings["port"]),
2023
interface=(server_settings["interface"]
2027
server_settings["priority"],
2030
pidfilename = "/var/run/mandos.pid"
2032
pidfile = open(pidfilename, "w")
2034
logger.error("Could not open file %r", pidfilename)
2037
uid = pwd.getpwnam("_mandos").pw_uid
2038
gid = pwd.getpwnam("_mandos").pw_gid
2041
uid = pwd.getpwnam("mandos").pw_uid
2042
gid = pwd.getpwnam("mandos").pw_gid
3144
2043
except KeyError:
2045
uid = pwd.getpwnam("nobody").pw_uid
2046
gid = pwd.getpwnam("nobody").pw_gid
3153
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3155
2053
except OSError as error:
3156
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3157
.format(uid, gid, os.strerror(error.errno)))
3158
if error.errno != errno.EPERM:
2054
if error[0] != errno.EPERM:
2057
if not debug and not debuglevel:
2058
logger.setLevel(logging.WARNING)
2060
level = getattr(logging, debuglevel.upper())
2061
logger.setLevel(level)
2064
logger.setLevel(logging.DEBUG)
3162
2065
# Enable all possible GnuTLS debugging
3164
2067
# "Use a log level over 10 to enable all debugging options."
3165
2068
# - GnuTLS manual
3166
gnutls.global_set_log_level(11)
2069
gnutls.library.functions.gnutls_global_set_log_level(11)
2071
@gnutls.library.types.gnutls_log_func
3169
2072
def debug_gnutls(level, string):
3170
2073
logger.debug("GnuTLS: %s", string[:-1])
3172
gnutls.global_set_log_function(debug_gnutls)
2075
(gnutls.library.functions
2076
.gnutls_global_set_log_function(debug_gnutls))
3174
2078
# Redirect stdin so all checkers get /dev/null
3175
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2079
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3176
2080
os.dup2(null, sys.stdin.fileno())
2084
# No console logging
2085
logger.removeHandler(console)
3180
2087
# Need to fork before connecting to D-Bus
3182
2089
# Close all input and output, do double fork, etc.
3185
if gi.version_info < (3, 10, 2):
3186
# multiprocessing will use threads, so before we use GLib we
3187
# need to inform GLib that threads will be used.
3190
2092
global main_loop
3191
2093
# From the Avahi example code
3192
DBusGMainLoop(set_as_default=True)
3193
main_loop = GLib.MainLoop()
2094
DBusGMainLoop(set_as_default=True )
2095
main_loop = gobject.MainLoop()
3194
2096
bus = dbus.SystemBus()
3195
2097
# End of Avahi example code
3198
2100
bus_name = dbus.service.BusName("se.recompile.Mandos",
3201
old_bus_name = dbus.service.BusName(
3202
"se.bsnet.fukt.Mandos", bus,
3204
except dbus.exceptions.DBusException as e:
3205
logger.error("Disabling D-Bus:", exc_info=e)
2101
bus, do_not_queue=True)
2102
old_bus_name = (dbus.service.BusName
2103
("se.bsnet.fukt.Mandos", bus,
2105
except dbus.exceptions.NameExistsException as e:
2106
logger.error(unicode(e) + ", disabling D-Bus")
3206
2107
use_dbus = False
3207
2108
server_settings["use_dbus"] = False
3208
2109
tcp_server.use_dbus = False
3210
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3211
service = AvahiServiceToSyslog(
3212
name=server_settings["servicename"],
3213
servicetype="_mandos._tcp",
3216
if server_settings["interface"]:
3217
service.interface = if_nametoindex(
3218
server_settings["interface"].encode("utf-8"))
2110
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2111
service = AvahiServiceToSyslog(name =
2112
server_settings["servicename"],
2113
servicetype = "_mandos._tcp",
2114
protocol = protocol, bus = bus)
2115
if server_settings["interface"]:
2116
service.interface = (if_nametoindex
2117
(str(server_settings["interface"])))
3220
2119
global multiprocessing_manager
3221
2120
multiprocessing_manager = multiprocessing.Manager()
3223
2122
client_class = Client
3225
client_class = functools.partial(ClientDBus, bus=bus)
3227
client_settings = Client.config_parser(client_config)
2124
client_class = functools.partial(ClientDBusTransitional,
2127
special_settings = {
2128
# Some settings need to be accessd by special methods;
2129
# booleans need .getboolean(), etc. Here is a list of them:
2130
"approved_by_default":
2132
client_config.getboolean(section, "approved_by_default"),
2134
# Construct a new dict of client settings of this form:
2135
# { client_name: {setting_name: value, ...}, ...}
2136
# with exceptions for any special settings as defined above
2137
client_settings = dict((clientname,
2139
(value if setting not in special_settings
2140
else special_settings[setting](clientname)))
2141
for setting, value in client_config.items(clientname)))
2142
for clientname in client_config.sections())
3228
2144
old_client_settings = {}
3231
# This is used to redirect stdout and stderr for checker processes
3233
wnull = open(os.devnull, "w") # A writable /dev/null
3234
# Only used if server is running in foreground but not in debug
3236
if debug or not foreground:
3239
# Get client data and settings from last running state.
2147
# Get client data and settings from last running state.
3240
2148
if server_settings["restore"]:
3242
2150
with open(stored_state_path, "rb") as stored_state:
3243
if sys.version_info.major == 2:
3244
clients_data, old_client_settings = pickle.load(
3247
bytes_clients_data, bytes_old_client_settings = (
3248
pickle.load(stored_state, encoding="bytes"))
3249
# Fix bytes to strings
3252
clients_data = {(key.decode("utf-8")
3253
if isinstance(key, bytes)
3256
bytes_clients_data.items()}
3257
del bytes_clients_data
3258
for key in clients_data:
3259
value = {(k.decode("utf-8")
3260
if isinstance(k, bytes) else k): v
3262
clients_data[key].items()}
3263
clients_data[key] = value
3265
value["client_structure"] = [
3267
if isinstance(s, bytes)
3269
value["client_structure"]]
3270
# .name, .host, and .checker_command
3271
for k in ("name", "host", "checker_command"):
3272
if isinstance(value[k], bytes):
3273
value[k] = value[k].decode("utf-8")
3274
if "key_id" not in value:
3275
value["key_id"] = ""
3276
elif "fingerprint" not in value:
3277
value["fingerprint"] = ""
3278
# old_client_settings
3280
old_client_settings = {
3281
(key.decode("utf-8")
3282
if isinstance(key, bytes)
3285
bytes_old_client_settings.items()}
3286
del bytes_old_client_settings
3287
# .host and .checker_command
3288
for value in old_client_settings.values():
3289
for attribute in ("host", "checker_command"):
3290
if isinstance(value[attribute], bytes):
3291
value[attribute] = (value[attribute]
2151
clients_data, old_client_settings = pickle.load(stored_state)
3293
2152
os.remove(stored_state_path)
3294
2153
except IOError as e:
3295
if e.errno == errno.ENOENT:
3296
logger.warning("Could not load persistent state:"
3297
" {}".format(os.strerror(e.errno)))
3299
logger.critical("Could not load persistent state:",
2154
logger.warning("Could not load persistant state: {0}".format(e))
2155
if e.errno != errno.ENOENT:
3302
except EOFError as e:
3303
logger.warning("Could not load persistent state: "
3307
with PGPEngine() as pgp:
3308
for client_name, client in clients_data.items():
3309
# Skip removed clients
3310
if client_name not in client_settings:
3313
# Decide which value to use after restoring saved state.
3314
# We have three different values: Old config file,
3315
# new config file, and saved state.
3316
# New config value takes precedence if it differs from old
3317
# config value, otherwise use saved state.
3318
for name, value in client_settings[client_name].items():
3320
# For each value in new config, check if it
3321
# differs from the old config value (Except for
3322
# the "secret" attribute)
3323
if (name != "secret"
3325
old_client_settings[client_name][name])):
3326
client[name] = value
3330
# Clients who has passed its expire date can still be
3331
# enabled if its last checker was successful. A Client
3332
# whose checker succeeded before we stored its state is
3333
# assumed to have successfully run all checkers during
3335
if client["enabled"]:
3336
if datetime.datetime.utcnow() >= client["expires"]:
3337
if not client["last_checked_ok"]:
3339
"disabling client {} - Client never "
3340
"performed a successful checker".format(
3342
client["enabled"] = False
3343
elif client["last_checker_status"] != 0:
3345
"disabling client {} - Client last"
3346
" checker failed with error code"
3349
client["last_checker_status"]))
3350
client["enabled"] = False
3352
client["expires"] = (
3353
datetime.datetime.utcnow()
3354
+ client["timeout"])
3355
logger.debug("Last checker succeeded,"
3356
" keeping {} enabled".format(
2158
for client in clients_data:
2159
client_name = client["name"]
2161
# Decide which value to use after restoring saved state.
2162
# We have three different values: Old config file,
2163
# new config file, and saved state.
2164
# New config value takes precedence if it differs from old
2165
# config value, otherwise use saved state.
2166
for name, value in client_settings[client_name].items():
3359
client["secret"] = pgp.decrypt(
3360
client["encrypted_secret"],
3361
client_settings[client_name]["secret"])
3363
# If decryption fails, we use secret from new settings
3364
logger.debug("Failed to decrypt {} old secret".format(
3366
client["secret"] = (client_settings[client_name]
3369
# Add/remove clients based on new changes made to config
3370
for client_name in (set(old_client_settings)
3371
- set(client_settings)):
3372
del clients_data[client_name]
3373
for client_name in (set(client_settings)
3374
- set(old_client_settings)):
3375
clients_data[client_name] = client_settings[client_name]
3377
# Create all client objects
3378
for client_name, client in clients_data.items():
3379
tcp_server.clients[client_name] = client_class(
3382
server_settings=server_settings)
2168
# For each value in new config, check if it differs
2169
# from the old config value (Except for the "secret"
2171
if name != "secret" and value != old_client_settings[client_name][name]:
2172
setattr(client, name, value)
2176
# Clients who has passed its expire date, can still be enabled if its
2177
# last checker was sucessful. Clients who checkers failed before we
2178
# stored it state is asumed to had failed checker during downtime.
2179
if client["enabled"] and client["last_checked_ok"]:
2180
if ((datetime.datetime.utcnow() - client["last_checked_ok"])
2181
> client["interval"]):
2182
if client["last_checker_status"] != 0:
2183
client["enabled"] = False
2185
client["expires"] = datetime.datetime.utcnow() + client["timeout"]
2187
client["changedstate"] = (multiprocessing_manager
2188
.Condition(multiprocessing_manager
2191
new_client = ClientDBusTransitional.__new__(ClientDBusTransitional)
2192
tcp_server.clients[client_name] = new_client
2193
new_client.bus = bus
2194
for name, value in client.iteritems():
2195
setattr(new_client, name, value)
2196
client_object_name = unicode(client_name).translate(
2197
{ord("."): ord("_"),
2198
ord("-"): ord("_")})
2199
new_client.dbus_object_path = (dbus.ObjectPath
2200
("/clients/" + client_object_name))
2201
DBusObjectWithProperties.__init__(new_client,
2203
new_client.dbus_object_path)
2205
tcp_server.clients[client_name] = Client.__new__(Client)
2206
for name, value in client.iteritems():
2207
setattr(tcp_server.clients[client_name], name, value)
2209
tcp_server.clients[client_name].decrypt_secret(
2210
client_settings[client_name]["secret"])
2212
# Create/remove clients based on new changes made to config
2213
for clientname in set(old_client_settings) - set(client_settings):
2214
del tcp_server.clients[clientname]
2215
for clientname in set(client_settings) - set(old_client_settings):
2216
tcp_server.clients[clientname] = (client_class(name = clientname,
3384
2222
if not tcp_server.clients:
3385
2223
logger.warning("No clients defined")
3388
if pidfile is not None:
3392
print(pid, file=pidfile)
3394
logger.error("Could not write to file %r with PID %d",
2229
pidfile.write(str(pid) + "\n".encode("utf-8"))
2232
logger.error("Could not write to file %r with PID %d",
2235
# "pidfile" was never created
3397
2237
del pidfilename
3399
for termsig in (signal.SIGHUP, signal.SIGTERM):
3400
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3401
lambda: main_loop.quit() and False)
2239
signal.signal(signal.SIGINT, signal.SIG_IGN)
2241
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2242
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3405
@alternate_dbus_interfaces(
3406
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3407
class MandosDBusService(DBusObjectWithObjectManager):
2245
class MandosDBusService(dbus.service.Object):
3408
2246
"""A D-Bus proxy object"""
3410
2247
def __init__(self):
3411
2248
dbus.service.Object.__init__(self, bus, "/")
3413
2249
_interface = "se.recompile.Mandos"
3415
2251
@dbus.service.signal(_interface, signature="o")
3416
2252
def ClientAdded(self, objpath):
3420
2256
@dbus.service.signal(_interface, signature="ss")
3421
def ClientNotFound(self, key_id, address):
2257
def ClientNotFound(self, fingerprint, address):
3425
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3427
2261
@dbus.service.signal(_interface, signature="os")
3428
2262
def ClientRemoved(self, objpath, name):
3432
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3434
2266
@dbus.service.method(_interface, out_signature="ao")
3435
2267
def GetAllClients(self):
3437
return dbus.Array(c.dbus_object_path for c in
3438
tcp_server.clients.values())
3440
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2269
return dbus.Array(c.dbus_object_path
2271
tcp_server.clients.itervalues())
3442
2273
@dbus.service.method(_interface,
3443
2274
out_signature="a{oa{sv}}")
3444
2275
def GetAllClientsWithProperties(self):
3446
2277
return dbus.Dictionary(
3447
{c.dbus_object_path: c.GetAll(
3448
"se.recompile.Mandos.Client")
3449
for c in tcp_server.clients.values()},
2278
((c.dbus_object_path, c.GetAll(""))
2279
for c in tcp_server.clients.itervalues()),
3450
2280
signature="oa{sv}")
3452
2282
@dbus.service.method(_interface, in_signature="o")
3453
2283
def RemoveClient(self, object_path):
3455
for c in tcp_server.clients.values():
2285
for c in tcp_server.clients.itervalues():
3456
2286
if c.dbus_object_path == object_path:
3457
2287
del tcp_server.clients[c.name]
3458
2288
c.remove_from_connection()
3459
# Don't signal the disabling
2289
# Don't signal anything except ClientRemoved
3460
2290
c.disable(quiet=True)
3461
# Emit D-Bus signal for removal
3462
self.client_removed_signal(c)
2292
self.ClientRemoved(object_path, c.name)
3464
2294
raise KeyError(object_path)
3468
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3469
out_signature="a{oa{sa{sv}}}")
3470
def GetManagedObjects(self):
3472
return dbus.Dictionary(
3473
{client.dbus_object_path:
3475
{interface: client.GetAll(interface)
3477
client._get_all_interface_names()})
3478
for client in tcp_server.clients.values()})
3480
def client_added_signal(self, client):
3481
"""Send the new standard signal and the old signal"""
3483
# New standard signal
3484
self.InterfacesAdded(
3485
client.dbus_object_path,
3487
{interface: client.GetAll(interface)
3489
client._get_all_interface_names()}))
3491
self.ClientAdded(client.dbus_object_path)
3493
def client_removed_signal(self, client):
3494
"""Send the new standard signal and the old signal"""
3496
# New standard signal
3497
self.InterfacesRemoved(
3498
client.dbus_object_path,
3499
client._get_all_interface_names())
3501
self.ClientRemoved(client.dbus_object_path,
3504
mandos_dbus_service = MandosDBusService()
3506
# Save modules to variables to exempt the modules from being
3507
# unloaded before the function registered with atexit() is run.
3508
mp = multiprocessing
2298
class MandosDBusServiceTransitional(MandosDBusService):
2299
__metaclass__ = AlternateDBusNamesMetaclass
2300
mandos_dbus_service = MandosDBusServiceTransitional()
3512
2303
"Cleanup function; run on exit"
3516
mp.active_children()
2306
multiprocessing.active_children()
3518
2307
if not (tcp_server.clients or client_settings):
3521
# Store client before exiting. Secrets are encrypted with key
3522
# based on what config file has. If config file is
3523
# removed/edited, old secret will thus be unrecovable.
3525
with PGPEngine() as pgp:
3526
for client in tcp_server.clients.values():
3527
key = client_settings[client.name]["secret"]
3528
client.encrypted_secret = pgp.encrypt(client.secret,
3532
# A list of attributes that can not be pickled
3534
exclude = {"bus", "changedstate", "secret",
3535
"checker", "server_settings"}
3536
for name, typ in inspect.getmembers(dbus.service
3540
client_dict["encrypted_secret"] = (client
3542
for attr in client.client_structure:
3543
if attr not in exclude:
3544
client_dict[attr] = getattr(client, attr)
3546
clients[client.name] = client_dict
3547
del client_settings[client.name]["secret"]
2310
# Store client before exiting. Secrets are encrypted with key based
2311
# on what config file has. If config file is removed/edited, old
2312
# secret will thus be unrecovable.
2314
for client in tcp_server.clients.itervalues():
2315
client.encrypt_secret(client_settings[client.name]["secret"])
2319
# A list of attributes that will not be stored when shuting down.
2320
exclude = set(("bus", "changedstate", "secret"))
2321
for name, typ in inspect.getmembers(dbus.service.Object):
2324
client_dict["encrypted_secret"] = client.encrypted_secret
2325
for attr in client.client_structure:
2326
if attr not in exclude:
2327
client_dict[attr] = getattr(client, attr)
2329
clients.append(client_dict)
2330
del client_settings[client.name]["secret"]
3550
with tempfile.NamedTemporaryFile(
3554
dir=os.path.dirname(stored_state_path),
3555
delete=False) as stored_state:
3556
pickle.dump((clients, client_settings), stored_state,
3558
tempname = stored_state.name
3559
os.rename(tempname, stored_state_path)
3560
except (IOError, OSError) as e:
3566
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3567
logger.warning("Could not save persistent state: {}"
3568
.format(os.strerror(e.errno)))
3570
logger.warning("Could not save persistent state:",
2333
with os.fdopen(os.open(stored_state_path, os.O_CREAT|os.O_WRONLY|os.O_TRUNC, 0600), "wb") as stored_state:
2334
pickle.dump((clients, client_settings), stored_state)
2335
except IOError as e:
2336
logger.warning("Could not save persistant state: {0}".format(e))
2337
if e.errno != errno.ENOENT:
3574
2340
# Delete all clients, and settings from config