63
import cPickle as pickle
70
import cPickle as pickle
64
73
import multiprocessing
69
83
import dbus.service
85
from gi.repository import GLib
72
86
from dbus.mainloop.glib import DBusGMainLoop
75
89
import xml.dom.minidom
77
import Crypto.Cipher.AES
92
if sys.version_info.major == 2:
96
# Show warnings by default
97
if not sys.warnoptions:
99
warnings.simplefilter("default")
101
# Try to find the value of SO_BINDTODEVICE:
103
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
104
# newer, and it is also the most natural place for it:
80
105
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
81
106
except AttributeError:
108
# This is where SO_BINDTODEVICE was up to and including Python
83
110
from IN import SO_BINDTODEVICE
84
111
except ImportError:
85
SO_BINDTODEVICE = None
112
# In Python 2.7 it seems to have been removed entirely.
113
# Try running the C preprocessor:
115
cc = subprocess.Popen(["cc", "--language=c", "-E",
117
stdin=subprocess.PIPE,
118
stdout=subprocess.PIPE)
119
stdout = cc.communicate(
120
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
121
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
122
except (OSError, ValueError, IndexError):
124
SO_BINDTODEVICE = None
126
if sys.version_info < (3, 2):
127
configparser.Configparser = configparser.SafeConfigParser
130
stored_state_file = "clients.pickle"
90
132
logger = logging.getLogger()
91
stored_state_path = "/var/lib/mandos/clients.pickle"
93
syslogger = (logging.handlers.SysLogHandler
94
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
95
address = str("/dev/log")))
96
syslogger.setFormatter(logging.Formatter
97
('Mandos [%(process)d]: %(levelname)s:'
99
logger.addHandler(syslogger)
101
console = logging.StreamHandler()
102
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
106
logger.addHandler(console)
133
logging.captureWarnings(True) # Show warnings via the logging system
137
if_nametoindex = ctypes.cdll.LoadLibrary(
138
ctypes.util.find_library("c")).if_nametoindex
139
except (OSError, AttributeError):
141
def if_nametoindex(interface):
142
"Get an interface index the hard way, i.e. using fcntl()"
143
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
144
with contextlib.closing(socket.socket()) as s:
145
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
146
struct.pack(b"16s16x", interface))
147
interface_index = struct.unpack("I", ifreq[16:20])[0]
148
return interface_index
151
def copy_function(func):
152
"""Make a copy of a function"""
153
if sys.version_info.major == 2:
154
return types.FunctionType(func.func_code,
160
return types.FunctionType(func.__code__,
167
def initlogger(debug, level=logging.WARNING):
168
"""init logger and add loglevel"""
171
syslogger = (logging.handlers.SysLogHandler(
172
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
174
syslogger.setFormatter(logging.Formatter
175
('Mandos [%(process)d]: %(levelname)s:'
177
logger.addHandler(syslogger)
180
console = logging.StreamHandler()
181
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
185
logger.addHandler(console)
186
logger.setLevel(level)
189
class PGPError(Exception):
190
"""Exception if encryption/decryption fails"""
195
"""A simple class for OpenPGP symmetric encryption & decryption"""
198
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
201
output = subprocess.check_output(["gpgconf"])
202
for line in output.splitlines():
203
name, text, path = line.split(b":")
208
if e.errno != errno.ENOENT:
210
self.gnupgargs = ['--batch',
211
'--homedir', self.tempdir,
214
# Only GPG version 1 has the --no-use-agent option.
215
if self.gpg == b"gpg" or self.gpg.endswith(b"/gpg"):
216
self.gnupgargs.append("--no-use-agent")
221
def __exit__(self, exc_type, exc_value, traceback):
229
if self.tempdir is not None:
230
# Delete contents of tempdir
231
for root, dirs, files in os.walk(self.tempdir,
233
for filename in files:
234
os.remove(os.path.join(root, filename))
236
os.rmdir(os.path.join(root, dirname))
238
os.rmdir(self.tempdir)
241
def password_encode(self, password):
242
# Passphrase can not be empty and can not contain newlines or
243
# NUL bytes. So we prefix it and hex encode it.
244
encoded = b"mandos" + binascii.hexlify(password)
245
if len(encoded) > 2048:
246
# GnuPG can't handle long passwords, so encode differently
247
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
248
.replace(b"\n", b"\\n")
249
.replace(b"\0", b"\\x00"))
252
def encrypt(self, data, password):
253
passphrase = self.password_encode(password)
254
with tempfile.NamedTemporaryFile(
255
dir=self.tempdir) as passfile:
256
passfile.write(passphrase)
258
proc = subprocess.Popen([self.gpg, '--symmetric',
262
stdin=subprocess.PIPE,
263
stdout=subprocess.PIPE,
264
stderr=subprocess.PIPE)
265
ciphertext, err = proc.communicate(input=data)
266
if proc.returncode != 0:
270
def decrypt(self, data, password):
271
passphrase = self.password_encode(password)
272
with tempfile.NamedTemporaryFile(
273
dir=self.tempdir) as passfile:
274
passfile.write(passphrase)
276
proc = subprocess.Popen([self.gpg, '--decrypt',
280
stdin=subprocess.PIPE,
281
stdout=subprocess.PIPE,
282
stderr=subprocess.PIPE)
283
decrypted_plaintext, err = proc.communicate(input=data)
284
if proc.returncode != 0:
286
return decrypted_plaintext
289
# Pretend that we have an Avahi module
291
"""This isn't so much a class as it is a module-like namespace."""
292
IF_UNSPEC = -1 # avahi-common/address.h
293
PROTO_UNSPEC = -1 # avahi-common/address.h
294
PROTO_INET = 0 # avahi-common/address.h
295
PROTO_INET6 = 1 # avahi-common/address.h
296
DBUS_NAME = "org.freedesktop.Avahi"
297
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
298
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
299
DBUS_PATH_SERVER = "/"
302
def string_array_to_txt_array(t):
303
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
304
for s in t), signature="ay")
305
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
306
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
307
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
308
SERVER_INVALID = 0 # avahi-common/defs.h
309
SERVER_REGISTERING = 1 # avahi-common/defs.h
310
SERVER_RUNNING = 2 # avahi-common/defs.h
311
SERVER_COLLISION = 3 # avahi-common/defs.h
312
SERVER_FAILURE = 4 # avahi-common/defs.h
109
315
class AvahiError(Exception):
110
316
def __init__(self, value, *args, **kwargs):
111
317
self.value = value
112
super(AvahiError, self).__init__(value, *args, **kwargs)
113
def __unicode__(self):
114
return unicode(repr(self.value))
318
return super(AvahiError, self).__init__(value, *args,
116
322
class AvahiServiceError(AvahiError):
119
326
class AvahiGroupError(AvahiError):
123
class AvahiService(object):
124
331
"""An Avahi (Zeroconf) service.
127
334
interface: integer; avahi.IF_UNSPEC or an interface index.
128
335
Used to optionally bind to the specified interface.
129
336
name: string; Example: 'Mandos'
130
337
type: string; Example: '_mandos._tcp'.
131
See <http://www.dns-sd.org/ServiceTypes.html>
338
See <https://www.iana.org/assignments/service-names-port-numbers>
132
339
port: integer; what port to announce
133
340
TXT: list of strings; TXT record for the service
134
341
domain: string; Domain to publish on, default to .local if empty.
263
500
follow_name_owner_changes=True),
264
501
avahi.DBUS_INTERFACE_SERVER)
265
502
self.server.connect_to_signal("StateChanged",
266
self.server_state_changed)
503
self.server_state_changed)
267
504
self.server_state_changed(self.server.GetState())
269
507
class AvahiServiceToSyslog(AvahiService):
508
def rename(self, *args, **kwargs):
271
509
"""Add the new name to the syslog messages"""
272
ret = AvahiService.rename(self)
273
syslogger.setFormatter(logging.Formatter
274
('Mandos (%s) [%%(process)d]:'
275
' %%(levelname)s: %%(message)s'
510
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
511
syslogger.setFormatter(logging.Formatter(
512
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
279
def _timedelta_to_milliseconds(td):
280
"Convert a datetime.timedelta() to milliseconds"
281
return ((td.days * 24 * 60 * 60 * 1000)
282
+ (td.seconds * 1000)
283
+ (td.microseconds // 1000))
285
class Client(object):
517
# Pretend that we have a GnuTLS module
519
"""This isn't so much a class as it is a module-like namespace."""
521
library = ctypes.util.find_library("gnutls")
523
library = ctypes.util.find_library("gnutls-deb0")
524
_library = ctypes.cdll.LoadLibrary(library)
527
# Unless otherwise indicated, the constants and types below are
528
# all from the gnutls/gnutls.h C header file.
539
E_NO_CERTIFICATE_FOUND = -49
544
KEYID_USE_SHA256 = 1 # gnutls/x509.h
545
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
548
class session_int(ctypes.Structure):
550
session_t = ctypes.POINTER(session_int)
552
class certificate_credentials_st(ctypes.Structure):
554
certificate_credentials_t = ctypes.POINTER(
555
certificate_credentials_st)
556
certificate_type_t = ctypes.c_int
558
class datum_t(ctypes.Structure):
559
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
560
('size', ctypes.c_uint)]
562
class openpgp_crt_int(ctypes.Structure):
564
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
565
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
566
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
567
credentials_type_t = ctypes.c_int
568
transport_ptr_t = ctypes.c_void_p
569
close_request_t = ctypes.c_int
572
class Error(Exception):
573
def __init__(self, message=None, code=None, args=()):
574
# Default usage is by a message string, but if a return
575
# code is passed, convert it to a string with
578
if message is None and code is not None:
579
message = gnutls.strerror(code)
580
return super(gnutls.Error, self).__init__(
583
class CertificateSecurityError(Error):
589
self._c_object = gnutls.certificate_credentials_t()
590
gnutls.certificate_allocate_credentials(
591
ctypes.byref(self._c_object))
592
self.type = gnutls.CRD_CERTIFICATE
595
gnutls.certificate_free_credentials(self._c_object)
598
def __init__(self, socket, credentials=None):
599
self._c_object = gnutls.session_t()
600
gnutls_flags = gnutls.CLIENT
601
if gnutls.check_version(b"3.5.6"):
602
gnutls_flags |= gnutls.NO_TICKETS
604
gnutls_flags |= gnutls.ENABLE_RAWPK
605
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
607
gnutls.set_default_priority(self._c_object)
608
gnutls.transport_set_ptr(self._c_object, socket.fileno())
609
gnutls.handshake_set_private_extensions(self._c_object,
612
if credentials is None:
613
credentials = gnutls.Credentials()
614
gnutls.credentials_set(self._c_object, credentials.type,
615
ctypes.cast(credentials._c_object,
617
self.credentials = credentials
620
gnutls.deinit(self._c_object)
623
return gnutls.handshake(self._c_object)
625
def send(self, data):
629
data_len -= gnutls.record_send(self._c_object,
634
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
636
# Error handling functions
637
def _error_code(result):
638
"""A function to raise exceptions on errors, suitable
639
for the 'restype' attribute on ctypes functions"""
642
if result == gnutls.E_NO_CERTIFICATE_FOUND:
643
raise gnutls.CertificateSecurityError(code=result)
644
raise gnutls.Error(code=result)
646
def _retry_on_error(result, func, arguments):
647
"""A function to retry on some errors, suitable
648
for the 'errcheck' attribute on ctypes functions"""
650
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
651
return _error_code(result)
652
result = func(*arguments)
655
# Unless otherwise indicated, the function declarations below are
656
# all from the gnutls/gnutls.h C header file.
659
priority_set_direct = _library.gnutls_priority_set_direct
660
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
661
ctypes.POINTER(ctypes.c_char_p)]
662
priority_set_direct.restype = _error_code
664
init = _library.gnutls_init
665
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
666
init.restype = _error_code
668
set_default_priority = _library.gnutls_set_default_priority
669
set_default_priority.argtypes = [session_t]
670
set_default_priority.restype = _error_code
672
record_send = _library.gnutls_record_send
673
record_send.argtypes = [session_t, ctypes.c_void_p,
675
record_send.restype = ctypes.c_ssize_t
676
record_send.errcheck = _retry_on_error
678
certificate_allocate_credentials = (
679
_library.gnutls_certificate_allocate_credentials)
680
certificate_allocate_credentials.argtypes = [
681
ctypes.POINTER(certificate_credentials_t)]
682
certificate_allocate_credentials.restype = _error_code
684
certificate_free_credentials = (
685
_library.gnutls_certificate_free_credentials)
686
certificate_free_credentials.argtypes = [
687
certificate_credentials_t]
688
certificate_free_credentials.restype = None
690
handshake_set_private_extensions = (
691
_library.gnutls_handshake_set_private_extensions)
692
handshake_set_private_extensions.argtypes = [session_t,
694
handshake_set_private_extensions.restype = None
696
credentials_set = _library.gnutls_credentials_set
697
credentials_set.argtypes = [session_t, credentials_type_t,
699
credentials_set.restype = _error_code
701
strerror = _library.gnutls_strerror
702
strerror.argtypes = [ctypes.c_int]
703
strerror.restype = ctypes.c_char_p
705
certificate_type_get = _library.gnutls_certificate_type_get
706
certificate_type_get.argtypes = [session_t]
707
certificate_type_get.restype = _error_code
709
certificate_get_peers = _library.gnutls_certificate_get_peers
710
certificate_get_peers.argtypes = [session_t,
711
ctypes.POINTER(ctypes.c_uint)]
712
certificate_get_peers.restype = ctypes.POINTER(datum_t)
714
global_set_log_level = _library.gnutls_global_set_log_level
715
global_set_log_level.argtypes = [ctypes.c_int]
716
global_set_log_level.restype = None
718
global_set_log_function = _library.gnutls_global_set_log_function
719
global_set_log_function.argtypes = [log_func]
720
global_set_log_function.restype = None
722
deinit = _library.gnutls_deinit
723
deinit.argtypes = [session_t]
724
deinit.restype = None
726
handshake = _library.gnutls_handshake
727
handshake.argtypes = [session_t]
728
handshake.restype = _error_code
729
handshake.errcheck = _retry_on_error
731
transport_set_ptr = _library.gnutls_transport_set_ptr
732
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
733
transport_set_ptr.restype = None
735
bye = _library.gnutls_bye
736
bye.argtypes = [session_t, close_request_t]
737
bye.restype = _error_code
738
bye.errcheck = _retry_on_error
740
check_version = _library.gnutls_check_version
741
check_version.argtypes = [ctypes.c_char_p]
742
check_version.restype = ctypes.c_char_p
744
_need_version = b"3.3.0"
745
if check_version(_need_version) is None:
746
raise self.Error("Needs GnuTLS {} or later"
747
.format(_need_version))
749
_tls_rawpk_version = b"3.6.6"
750
has_rawpk = bool(check_version(_tls_rawpk_version))
754
class pubkey_st(ctypes.Structure):
756
pubkey_t = ctypes.POINTER(pubkey_st)
758
x509_crt_fmt_t = ctypes.c_int
760
# All the function declarations below are from gnutls/abstract.h
761
pubkey_init = _library.gnutls_pubkey_init
762
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
763
pubkey_init.restype = _error_code
765
pubkey_import = _library.gnutls_pubkey_import
766
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
768
pubkey_import.restype = _error_code
770
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
771
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
772
ctypes.POINTER(ctypes.c_ubyte),
773
ctypes.POINTER(ctypes.c_size_t)]
774
pubkey_get_key_id.restype = _error_code
776
pubkey_deinit = _library.gnutls_pubkey_deinit
777
pubkey_deinit.argtypes = [pubkey_t]
778
pubkey_deinit.restype = None
780
# All the function declarations below are from gnutls/openpgp.h
782
openpgp_crt_init = _library.gnutls_openpgp_crt_init
783
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
784
openpgp_crt_init.restype = _error_code
786
openpgp_crt_import = _library.gnutls_openpgp_crt_import
787
openpgp_crt_import.argtypes = [openpgp_crt_t,
788
ctypes.POINTER(datum_t),
790
openpgp_crt_import.restype = _error_code
792
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
793
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
794
ctypes.POINTER(ctypes.c_uint)]
795
openpgp_crt_verify_self.restype = _error_code
797
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
798
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
799
openpgp_crt_deinit.restype = None
801
openpgp_crt_get_fingerprint = (
802
_library.gnutls_openpgp_crt_get_fingerprint)
803
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
807
openpgp_crt_get_fingerprint.restype = _error_code
809
if check_version(b"3.6.4"):
810
certificate_type_get2 = _library.gnutls_certificate_type_get2
811
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
812
certificate_type_get2.restype = _error_code
814
# Remove non-public functions
815
del _error_code, _retry_on_error
818
def call_pipe(connection, # : multiprocessing.Connection
819
func, *args, **kwargs):
820
"""This function is meant to be called by multiprocessing.Process
822
This function runs func(*args, **kwargs), and writes the resulting
823
return value on the provided multiprocessing.Connection.
825
connection.send(func(*args, **kwargs))
286
830
"""A representation of a client host served by this server.
289
_approved: bool(); 'None' if not yet approved/disapproved
833
approved: bool(); 'None' if not yet approved/disapproved
290
834
approval_delay: datetime.timedelta(); Time to wait for approval
291
835
approval_duration: datetime.timedelta(); Duration of one approval
292
checker: subprocess.Popen(); a running checker process used
293
to see if the client lives.
294
'None' if no process is running.
295
checker_callback_tag: a gobject event source tag, or None
836
checker: multiprocessing.Process(); a running checker process used
837
to see if the client lives. 'None' if no process is
839
checker_callback_tag: a GLib event source tag, or None
296
840
checker_command: string; External command which is run to check
297
841
if client lives. %() expansions are done at
298
842
runtime with vars(self) as dict, so that for
299
843
instance %(name)s can be used in the command.
300
checker_initiator_tag: a gobject event source tag, or None
844
checker_initiator_tag: a GLib event source tag, or None
301
845
created: datetime.datetime(); (UTC) object creation
302
846
client_structure: Object describing what attributes a client has
303
847
and is used for storing the client at exit
304
848
current_checker_command: string; current running checker_command
305
disable_initiator_tag: a gobject event source tag, or None
849
disable_initiator_tag: a GLib event source tag, or None
307
851
fingerprint: string (40 or 32 hexadecimal digits); used to
308
uniquely identify the client
852
uniquely identify an OpenPGP client
853
key_id: string (64 hexadecimal digits); used to uniquely identify
854
a client using raw public keys
309
855
host: string; available for use by the checker command
310
856
interval: datetime.timedelta(); How often to start a new checker
311
857
last_approval_request: datetime.datetime(); (UTC) or None
312
858
last_checked_ok: datetime.datetime(); (UTC) or None
313
859
last_checker_status: integer between 0 and 255 reflecting exit
314
status of last checker. -1 reflect crashed
316
last_enabled: datetime.datetime(); (UTC)
860
status of last checker. -1 reflects crashed
861
checker, -2 means no checker completed yet.
862
last_checker_signal: The signal which killed the last checker, if
863
last_checker_status is -1
864
last_enabled: datetime.datetime(); (UTC) or None
317
865
name: string; from the config file, used in log messages and
318
866
D-Bus identifiers
319
867
secret: bytestring; sent verbatim (over TLS) to client
320
868
timeout: datetime.timedelta(); How long from last_checked_ok
321
869
until this client is disabled
322
extended_timeout: extra long timeout when password has been sent
870
extended_timeout: extra long timeout when secret has been sent
323
871
runtime_expansions: Allowed attributes for runtime expansion.
324
872
expires: datetime.datetime(); time (UTC) when a client will be
325
873
disabled, or None
874
server_settings: The server_settings dict from main()
328
877
runtime_expansions = ("approval_delay", "approval_duration",
329
"created", "enabled", "fingerprint",
330
"host", "interval", "last_checked_ok",
878
"created", "enabled", "expires", "key_id",
879
"fingerprint", "host", "interval",
880
"last_approval_request", "last_checked_ok",
331
881
"last_enabled", "name", "timeout")
333
def timeout_milliseconds(self):
334
"Return the 'timeout' attribute in milliseconds"
335
return _timedelta_to_milliseconds(self.timeout)
337
def extended_timeout_milliseconds(self):
338
"Return the 'extended_timeout' attribute in milliseconds"
339
return _timedelta_to_milliseconds(self.extended_timeout)
341
def interval_milliseconds(self):
342
"Return the 'interval' attribute in milliseconds"
343
return _timedelta_to_milliseconds(self.interval)
345
def approval_delay_milliseconds(self):
346
return _timedelta_to_milliseconds(self.approval_delay)
348
def __init__(self, name = None, config=None):
349
"""Note: the 'checker' key in 'config' sets the
350
'checker_command' attribute and *not* the 'checker'
884
"extended_timeout": "PT15M",
886
"checker": "fping -q -- %%(host)s",
888
"approval_delay": "PT0S",
889
"approval_duration": "PT1S",
890
"approved_by_default": "True",
895
def config_parser(config):
896
"""Construct a new dict of client settings of this form:
897
{ client_name: {setting_name: value, ...}, ...}
898
with exceptions for any special settings as defined above.
899
NOTE: Must be a pure function. Must return the same result
900
value given the same arguments.
903
for client_name in config.sections():
904
section = dict(config.items(client_name))
905
client = settings[client_name] = {}
907
client["host"] = section["host"]
908
# Reformat values from string types to Python types
909
client["approved_by_default"] = config.getboolean(
910
client_name, "approved_by_default")
911
client["enabled"] = config.getboolean(client_name,
914
# Uppercase and remove spaces from key_id and fingerprint
915
# for later comparison purposes with return value from the
916
# key_id() and fingerprint() functions
917
client["key_id"] = (section.get("key_id", "").upper()
919
client["fingerprint"] = (section["fingerprint"].upper()
921
if "secret" in section:
922
client["secret"] = codecs.decode(section["secret"]
925
elif "secfile" in section:
926
with open(os.path.expanduser(os.path.expandvars
927
(section["secfile"])),
929
client["secret"] = secfile.read()
931
raise TypeError("No secret or secfile for section {}"
933
client["timeout"] = string_to_delta(section["timeout"])
934
client["extended_timeout"] = string_to_delta(
935
section["extended_timeout"])
936
client["interval"] = string_to_delta(section["interval"])
937
client["approval_delay"] = string_to_delta(
938
section["approval_delay"])
939
client["approval_duration"] = string_to_delta(
940
section["approval_duration"])
941
client["checker_command"] = section["checker"]
942
client["last_approval_request"] = None
943
client["last_checked_ok"] = None
944
client["last_checker_status"] = -2
948
def __init__(self, settings, name=None, server_settings=None):
950
if server_settings is None:
952
self.server_settings = server_settings
953
# adding all client settings
954
for setting, value in settings.items():
955
setattr(self, setting, value)
958
if not hasattr(self, "last_enabled"):
959
self.last_enabled = datetime.datetime.utcnow()
960
if not hasattr(self, "expires"):
961
self.expires = (datetime.datetime.utcnow()
964
self.last_enabled = None
355
967
logger.debug("Creating client %r", self.name)
356
# Uppercase and remove spaces from fingerprint for later
357
# comparison purposes with return value from the fingerprint()
359
self.fingerprint = (config["fingerprint"].upper()
968
logger.debug(" Key ID: %s", self.key_id)
361
969
logger.debug(" Fingerprint: %s", self.fingerprint)
362
if "secret" in config:
363
self.secret = config["secret"].decode("base64")
364
elif "secfile" in config:
365
with open(os.path.expanduser(os.path.expandvars
366
(config["secfile"])),
368
self.secret = secfile.read()
370
raise TypeError("No secret or secfile for client %s"
372
self.host = config.get("host", "")
373
self.created = datetime.datetime.utcnow()
375
self.last_approval_request = None
376
self.last_enabled = datetime.datetime.utcnow()
377
self.last_checked_ok = None
378
self.last_checker_status = None
379
self.timeout = string_to_delta(config["timeout"])
380
self.extended_timeout = string_to_delta(config
381
["extended_timeout"])
382
self.interval = string_to_delta(config["interval"])
970
self.created = settings.get("created",
971
datetime.datetime.utcnow())
973
# attributes specific for this server instance
383
974
self.checker = None
384
975
self.checker_initiator_tag = None
385
976
self.disable_initiator_tag = None
386
self.expires = datetime.datetime.utcnow() + self.timeout
387
977
self.checker_callback_tag = None
388
self.checker_command = config["checker"]
389
978
self.current_checker_command = None
390
self._approved = None
391
self.approved_by_default = config.get("approved_by_default",
393
980
self.approvals_pending = 0
394
self.approval_delay = string_to_delta(
395
config["approval_delay"])
396
self.approval_duration = string_to_delta(
397
config["approval_duration"])
398
self.changedstate = (multiprocessing_manager
399
.Condition(multiprocessing_manager
401
self.client_structure = [attr for attr
402
in self.__dict__.iterkeys()
981
self.changedstate = multiprocessing_manager.Condition(
982
multiprocessing_manager.Lock())
983
self.client_structure = [attr
984
for attr in self.__dict__.keys()
403
985
if not attr.startswith("_")]
404
986
self.client_structure.append("client_structure")
407
for name, t in inspect.getmembers(type(self),
988
for name, t in inspect.getmembers(
989
type(self), lambda obj: isinstance(obj, property)):
411
990
if not name.startswith("_"):
412
991
self.client_structure.append(name)
414
993
# Send notice to process children that client state has changed
415
994
def send_changedstate(self):
416
995
with self.changedstate:
417
996
self.changedstate.notify_all()
419
998
def enable(self):
420
999
"""Start this client's checker and timeout hooks"""
421
1000
if getattr(self, "enabled", False):
422
1001
# Already enabled
424
self.send_changedstate()
425
1003
self.expires = datetime.datetime.utcnow() + self.timeout
426
1004
self.enabled = True
427
1005
self.last_enabled = datetime.datetime.utcnow()
428
1006
self.init_checker()
1007
self.send_changedstate()
430
1009
def disable(self, quiet=True):
431
1010
"""Disable this client."""
432
1011
if not getattr(self, "enabled", False):
435
self.send_changedstate()
437
1014
logger.info("Disabling client %s", self.name)
438
if getattr(self, "disable_initiator_tag", False):
439
gobject.source_remove(self.disable_initiator_tag)
1015
if getattr(self, "disable_initiator_tag", None) is not None:
1016
GLib.source_remove(self.disable_initiator_tag)
440
1017
self.disable_initiator_tag = None
441
1018
self.expires = None
442
if getattr(self, "checker_initiator_tag", False):
443
gobject.source_remove(self.checker_initiator_tag)
1019
if getattr(self, "checker_initiator_tag", None) is not None:
1020
GLib.source_remove(self.checker_initiator_tag)
444
1021
self.checker_initiator_tag = None
445
1022
self.stop_checker()
446
1023
self.enabled = False
447
# Do not run this again if called by a gobject.timeout_add
1025
self.send_changedstate()
1026
# Do not run this again if called by a GLib.timeout_add
450
1029
def __del__(self):
453
1032
def init_checker(self):
454
1033
# Schedule a new checker to be started an 'interval' from now,
455
1034
# and every interval from then on.
456
self.checker_initiator_tag = (gobject.timeout_add
457
(self.interval_milliseconds(),
1035
if self.checker_initiator_tag is not None:
1036
GLib.source_remove(self.checker_initiator_tag)
1037
self.checker_initiator_tag = GLib.timeout_add(
1038
int(self.interval.total_seconds() * 1000),
459
1040
# Schedule a disable() when 'timeout' has passed
460
self.disable_initiator_tag = (gobject.timeout_add
461
(self.timeout_milliseconds(),
1041
if self.disable_initiator_tag is not None:
1042
GLib.source_remove(self.disable_initiator_tag)
1043
self.disable_initiator_tag = GLib.timeout_add(
1044
int(self.timeout.total_seconds() * 1000), self.disable)
463
1045
# Also start a new checker *right now*.
464
1046
self.start_checker()
467
def checker_callback(self, pid, condition, command):
1048
def checker_callback(self, source, condition, connection,
468
1050
"""The checker has completed, so take appropriate actions."""
1051
# Read return code from connection (see call_pipe)
1052
returncode = connection.recv()
1054
if self.checker is not None:
469
1056
self.checker_callback_tag = None
470
1057
self.checker = None
471
if os.WIFEXITED(condition):
472
self.last_checker_status = os.WEXITSTATUS(condition)
1060
self.last_checker_status = returncode
1061
self.last_checker_signal = None
473
1062
if self.last_checker_status == 0:
474
1063
logger.info("Checker for %(name)s succeeded",
476
1065
self.checked_ok()
478
logger.info("Checker for %(name)s failed",
1067
logger.info("Checker for %(name)s failed", vars(self))
481
1069
self.last_checker_status = -1
1070
self.last_checker_signal = -returncode
482
1071
logger.warning("Checker for %(name)s crashed?",
485
def checked_ok(self, timeout=None):
486
"""Bump up the timeout for this client.
488
This should only be called when the client has been seen,
1075
def checked_ok(self):
1076
"""Assert that the client has been seen, alive and well."""
1077
self.last_checked_ok = datetime.datetime.utcnow()
1078
self.last_checker_status = 0
1079
self.last_checker_signal = None
1082
def bump_timeout(self, timeout=None):
1083
"""Bump up the timeout for this client."""
491
1084
if timeout is None:
492
1085
timeout = self.timeout
493
self.last_checked_ok = datetime.datetime.utcnow()
494
1086
if self.disable_initiator_tag is not None:
495
gobject.source_remove(self.disable_initiator_tag)
1087
GLib.source_remove(self.disable_initiator_tag)
1088
self.disable_initiator_tag = None
496
1089
if getattr(self, "enabled", False):
497
self.disable_initiator_tag = (gobject.timeout_add
498
(_timedelta_to_milliseconds
499
(timeout), self.disable))
1090
self.disable_initiator_tag = GLib.timeout_add(
1091
int(timeout.total_seconds() * 1000), self.disable)
500
1092
self.expires = datetime.datetime.utcnow() + timeout
502
1094
def need_approval(self):
503
1095
self.last_approval_request = datetime.datetime.utcnow()
505
1097
def start_checker(self):
506
1098
"""Start a new checker subprocess if one is not running.
508
1100
If a checker already exists, leave it running and do
510
1102
# The reason for not killing a running checker is that if we
511
# did that, then if a checker (for some reason) started
512
# running slowly and taking more than 'interval' time, the
513
# client would inevitably timeout, since no checker would get
514
# a chance to run to completion. If we instead leave running
1103
# did that, and if a checker (for some reason) started running
1104
# slowly and taking more than 'interval' time, then the client
1105
# would inevitably timeout, since no checker would get a
1106
# chance to run to completion. If we instead leave running
515
1107
# checkers alone, the checker would have to take more time
516
1108
# than 'timeout' for the client to be disabled, which is as it
519
# If a checker exists, make sure it is not a zombie
521
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
522
except (AttributeError, OSError) as error:
523
if (isinstance(error, OSError)
524
and error.errno != errno.ECHILD):
528
logger.warning("Checker was a zombie")
529
gobject.source_remove(self.checker_callback_tag)
530
self.checker_callback(pid, status,
531
self.current_checker_command)
1111
if self.checker is not None and not self.checker.is_alive():
1112
logger.warning("Checker was not alive; joining")
532
1115
# Start a new checker if needed
533
1116
if self.checker is None:
1117
# Escape attributes for the shell
1119
attr: re.escape(str(getattr(self, attr)))
1120
for attr in self.runtime_expansions}
535
# In case checker_command has exactly one % operator
536
command = self.checker_command % self.host
538
# Escape attributes for the shell
539
escaped_attrs = dict(
541
re.escape(unicode(str(getattr(self, attr, "")),
545
self.runtime_expansions)
548
command = self.checker_command % escaped_attrs
549
except TypeError as error:
550
logger.error('Could not format string "%s":'
551
' %s', self.checker_command, error)
552
return True # Try again later
1122
command = self.checker_command % escaped_attrs
1123
except TypeError as error:
1124
logger.error('Could not format string "%s"',
1125
self.checker_command,
1127
return True # Try again later
553
1128
self.current_checker_command = command
555
logger.info("Starting checker %r for %s",
557
# We don't need to redirect stdout and stderr, since
558
# in normal mode, that is already done by daemon(),
559
# and in debug mode we don't want to. (Stdin is
560
# always replaced by /dev/null.)
561
self.checker = subprocess.Popen(command,
564
self.checker_callback_tag = (gobject.child_watch_add
566
self.checker_callback,
568
# The checker may have completed before the gobject
569
# watch was added. Check for this.
570
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
572
gobject.source_remove(self.checker_callback_tag)
573
self.checker_callback(pid, status, command)
574
except OSError as error:
575
logger.error("Failed to start subprocess: %s",
577
# Re-run this periodically if run by gobject.timeout_add
1129
logger.info("Starting checker %r for %s", command,
1131
# We don't need to redirect stdout and stderr, since
1132
# in normal mode, that is already done by daemon(),
1133
# and in debug mode we don't want to. (Stdin is
1134
# always replaced by /dev/null.)
1135
# The exception is when not debugging but nevertheless
1136
# running in the foreground; use the previously
1138
popen_args = {"close_fds": True,
1141
if (not self.server_settings["debug"]
1142
and self.server_settings["foreground"]):
1143
popen_args.update({"stdout": wnull,
1145
pipe = multiprocessing.Pipe(duplex=False)
1146
self.checker = multiprocessing.Process(
1148
args=(pipe[1], subprocess.call, command),
1150
self.checker.start()
1151
self.checker_callback_tag = GLib.io_add_watch(
1152
GLib.IOChannel.unix_new(pipe[0].fileno()),
1153
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
1154
self.checker_callback, pipe[0], command)
1155
# Re-run this periodically if run by GLib.timeout_add
580
1158
def stop_checker(self):
581
1159
"""Force the checker process, if any, to stop."""
582
1160
if self.checker_callback_tag:
583
gobject.source_remove(self.checker_callback_tag)
1161
GLib.source_remove(self.checker_callback_tag)
584
1162
self.checker_callback_tag = None
585
1163
if getattr(self, "checker", None) is None:
587
1165
logger.debug("Stopping checker for %(name)s", vars(self))
589
os.kill(self.checker.pid, signal.SIGTERM)
591
#if self.checker.poll() is None:
592
# os.kill(self.checker.pid, signal.SIGKILL)
593
except OSError as error:
594
if error.errno != errno.ESRCH: # No such process
1166
self.checker.terminate()
596
1167
self.checker = None
598
# Encrypts a client secret and stores it in a varible
600
def encrypt_secret(self, key):
601
# Encryption-key need to be of a specific size, so we hash
603
hasheng = hashlib.sha256()
605
encryptionkey = hasheng.digest()
607
# Create validation hash so we know at decryption if it was
609
hasheng = hashlib.sha256()
610
hasheng.update(self.secret)
611
validationhash = hasheng.digest()
614
iv = os.urandom(Crypto.Cipher.AES.block_size)
615
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
616
Crypto.Cipher.AES.MODE_CFB, iv)
617
ciphertext = ciphereng.encrypt(validationhash+self.secret)
618
self.encrypted_secret = (ciphertext, iv)
620
# Decrypt a encrypted client secret
621
def decrypt_secret(self, key):
622
# Decryption-key need to be of a specific size, so we hash
624
hasheng = hashlib.sha256()
626
encryptionkey = hasheng.digest()
628
# Decrypt encrypted secret
629
ciphertext, iv = self.encrypted_secret
630
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
631
Crypto.Cipher.AES.MODE_CFB, iv)
632
plain = ciphereng.decrypt(ciphertext)
634
# Validate decrypted secret to know if it was succesful
635
hasheng = hashlib.sha256()
636
validationhash = plain[:hasheng.digest_size]
637
secret = plain[hasheng.digest_size:]
638
hasheng.update(secret)
640
# If validation fails, we use key as new secret. Otherwise, we
641
# use the decrypted secret
642
if hasheng.digest() == validationhash:
646
del self.encrypted_secret
649
def dbus_service_property(dbus_interface, signature="v",
650
access="readwrite", byte_arrays=False):
1170
def dbus_service_property(dbus_interface,
651
1174
"""Decorators for marking methods of a DBusObjectWithProperties to
652
1175
become properties on the D-Bus.
654
1177
The decorated method will be called with no arguments by "Get"
655
1178
and with one argument by "Set".
657
1180
The parameters, where they are supported, are the same as
658
1181
dbus.service.method, except there is only "signature", since the
659
1182
type from Get() and the type sent to Set() is the same.
829
1514
except (AttributeError, xml.dom.DOMException,
830
1515
xml.parsers.expat.ExpatError) as error:
831
1516
logger.error("Failed to override Introspection method",
836
def datetime_to_dbus (dt, variant_level=0):
1522
dbus.OBJECT_MANAGER_IFACE
1523
except AttributeError:
1524
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1527
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1528
"""A D-Bus object with an ObjectManager.
1530
Classes inheriting from this exposes the standard
1531
GetManagedObjects call and the InterfacesAdded and
1532
InterfacesRemoved signals on the standard
1533
"org.freedesktop.DBus.ObjectManager" interface.
1535
Note: No signals are sent automatically; they must be sent
1538
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1539
out_signature="a{oa{sa{sv}}}")
1540
def GetManagedObjects(self):
1541
"""This function must be overridden"""
1542
raise NotImplementedError()
1544
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1545
signature="oa{sa{sv}}")
1546
def InterfacesAdded(self, object_path, interfaces_and_properties):
1549
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1550
def InterfacesRemoved(self, object_path, interfaces):
1553
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1555
path_keyword='object_path',
1556
connection_keyword='connection')
1557
def Introspect(self, object_path, connection):
1558
"""Overloading of standard D-Bus method.
1560
Override return argument name of GetManagedObjects to be
1561
"objpath_interfaces_and_properties"
1563
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1567
document = xml.dom.minidom.parseString(xmlstring)
1569
for if_tag in document.getElementsByTagName("interface"):
1570
# Fix argument name for the GetManagedObjects method
1571
if (if_tag.getAttribute("name")
1572
== dbus.OBJECT_MANAGER_IFACE):
1573
for cn in if_tag.getElementsByTagName("method"):
1574
if (cn.getAttribute("name")
1575
== "GetManagedObjects"):
1576
for arg in cn.getElementsByTagName("arg"):
1577
if (arg.getAttribute("direction")
1581
"objpath_interfaces"
1583
xmlstring = document.toxml("utf-8")
1585
except (AttributeError, xml.dom.DOMException,
1586
xml.parsers.expat.ExpatError) as error:
1587
logger.error("Failed to override Introspection method",
1592
def datetime_to_dbus(dt, variant_level=0):
837
1593
"""Convert a UTC datetime.datetime() to a D-Bus type."""
839
return dbus.String("", variant_level = variant_level)
840
return dbus.String(dt.isoformat(),
841
variant_level=variant_level)
843
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
845
"""Applied to an empty subclass of a D-Bus object, this metaclass
846
will add additional D-Bus attributes matching a certain pattern.
1595
return dbus.String("", variant_level=variant_level)
1596
return dbus.String(dt.isoformat(), variant_level=variant_level)
1599
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1600
"""A class decorator; applied to a subclass of
1601
dbus.service.Object, it will add alternate D-Bus attributes with
1602
interface names according to the "alt_interface_names" mapping.
1605
@alternate_dbus_interfaces({"org.example.Interface":
1606
"net.example.AlternateInterface"})
1607
class SampleDBusObject(dbus.service.Object):
1608
@dbus.service.method("org.example.Interface")
1609
def SampleDBusMethod():
1612
The above "SampleDBusMethod" on "SampleDBusObject" will be
1613
reachable via two interfaces: "org.example.Interface" and
1614
"net.example.AlternateInterface", the latter of which will have
1615
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1616
"true", unless "deprecate" is passed with a False value.
1618
This works for methods and signals, and also for D-Bus properties
1619
(from DBusObjectWithProperties) and interfaces (from the
1620
dbus_interface_annotations decorator).
848
def __new__(mcs, name, bases, attr):
849
# Go through all the base classes which could have D-Bus
850
# methods, signals, or properties in them
851
for base in (b for b in bases
852
if issubclass(b, dbus.service.Object)):
853
# Go though all attributes of the base class
854
for attrname, attribute in inspect.getmembers(base):
1624
for orig_interface_name, alt_interface_name in (
1625
alt_interface_names.items()):
1627
interface_names = set()
1628
# Go though all attributes of the class
1629
for attrname, attribute in inspect.getmembers(cls):
855
1630
# Ignore non-D-Bus attributes, and D-Bus attributes
856
1631
# with the wrong interface name
857
1632
if (not hasattr(attribute, "_dbus_interface")
858
or not attribute._dbus_interface
859
.startswith("se.recompile.Mandos")):
1633
or not attribute._dbus_interface.startswith(
1634
orig_interface_name)):
861
1636
# Create an alternate D-Bus interface name based on
862
1637
# the current name
863
alt_interface = (attribute._dbus_interface
864
.replace("se.recompile.Mandos",
865
"se.bsnet.fukt.Mandos"))
1638
alt_interface = attribute._dbus_interface.replace(
1639
orig_interface_name, alt_interface_name)
1640
interface_names.add(alt_interface)
866
1641
# Is this a D-Bus signal?
867
1642
if getattr(attribute, "_dbus_is_signal", False):
868
# Extract the original non-method function by
870
nonmethod_func = (dict(
1643
# Extract the original non-method undecorated
1644
# function by black magic
1645
if sys.version_info.major == 2:
1646
nonmethod_func = (dict(
871
1647
zip(attribute.func_code.co_freevars,
872
attribute.__closure__))["func"]
1648
attribute.__closure__))
1649
["func"].cell_contents)
1651
nonmethod_func = (dict(
1652
zip(attribute.__code__.co_freevars,
1653
attribute.__closure__))
1654
["func"].cell_contents)
874
1655
# Create a new, but exactly alike, function
875
1656
# object, and decorate it to be a new D-Bus signal
876
1657
# with the alternate D-Bus interface name
877
new_function = (dbus.service.signal
879
attribute._dbus_signature)
881
nonmethod_func.func_code,
882
nonmethod_func.func_globals,
883
nonmethod_func.func_name,
884
nonmethod_func.func_defaults,
885
nonmethod_func.func_closure)))
1658
new_function = copy_function(nonmethod_func)
1659
new_function = (dbus.service.signal(
1661
attribute._dbus_signature)(new_function))
1662
# Copy annotations, if any
1664
new_function._dbus_annotations = dict(
1665
attribute._dbus_annotations)
1666
except AttributeError:
886
1669
# Define a creator of a function to call both the
887
# old and new functions, so both the old and new
888
# signals gets sent when the function is called
1670
# original and alternate functions, so both the
1671
# original and alternate signals gets sent when
1672
# the function is called
889
1673
def fixscope(func1, func2):
890
1674
"""This function is a scope container to pass
891
1675
func1 and func2 to the "call_both" function
892
1676
outside of its arguments"""
1678
@functools.wraps(func2)
893
1679
def call_both(*args, **kwargs):
894
1680
"""This function will emit two D-Bus
895
1681
signals by calling func1 and func2"""
896
1682
func1(*args, **kwargs)
897
1683
func2(*args, **kwargs)
1684
# Make wrapper function look like a D-Bus
1686
for name, attr in inspect.getmembers(func2):
1687
if name.startswith("_dbus_"):
1688
setattr(call_both, name, attr)
898
1690
return call_both
899
1691
# Create the "call_both" function and add it to
901
attr[attrname] = fixscope(attribute,
1693
attr[attrname] = fixscope(attribute, new_function)
903
1694
# Is this a D-Bus method?
904
1695
elif getattr(attribute, "_dbus_is_method", False):
905
1696
# Create a new, but exactly alike, function
906
1697
# object. Decorate it to be a new D-Bus method
907
1698
# with the alternate D-Bus interface name. Add it
909
attr[attrname] = (dbus.service.method
911
attribute._dbus_in_signature,
912
attribute._dbus_out_signature)
914
(attribute.func_code,
915
attribute.func_globals,
917
attribute.func_defaults,
918
attribute.func_closure)))
1701
dbus.service.method(
1703
attribute._dbus_in_signature,
1704
attribute._dbus_out_signature)
1705
(copy_function(attribute)))
1706
# Copy annotations, if any
1708
attr[attrname]._dbus_annotations = dict(
1709
attribute._dbus_annotations)
1710
except AttributeError:
919
1712
# Is this a D-Bus property?
920
1713
elif getattr(attribute, "_dbus_is_property", False):
921
1714
# Create a new, but exactly alike, function
922
1715
# object, and decorate it to be a new D-Bus
923
1716
# property with the alternate D-Bus interface
924
1717
# name. Add it to the class.
925
attr[attrname] = (dbus_service_property
927
attribute._dbus_signature,
928
attribute._dbus_access,
930
._dbus_get_args_options
933
(attribute.func_code,
934
attribute.func_globals,
936
attribute.func_defaults,
937
attribute.func_closure)))
938
return type.__new__(mcs, name, bases, attr)
1718
attr[attrname] = (dbus_service_property(
1719
alt_interface, attribute._dbus_signature,
1720
attribute._dbus_access,
1721
attribute._dbus_get_args_options
1723
(copy_function(attribute)))
1724
# Copy annotations, if any
1726
attr[attrname]._dbus_annotations = dict(
1727
attribute._dbus_annotations)
1728
except AttributeError:
1730
# Is this a D-Bus interface?
1731
elif getattr(attribute, "_dbus_is_interface", False):
1732
# Create a new, but exactly alike, function
1733
# object. Decorate it to be a new D-Bus interface
1734
# with the alternate D-Bus interface name. Add it
1737
dbus_interface_annotations(alt_interface)
1738
(copy_function(attribute)))
1740
# Deprecate all alternate interfaces
1741
iname = "_AlternateDBusNames_interface_annotation{}"
1742
for interface_name in interface_names:
1744
@dbus_interface_annotations(interface_name)
1746
return {"org.freedesktop.DBus.Deprecated":
1748
# Find an unused name
1749
for aname in (iname.format(i)
1750
for i in itertools.count()):
1751
if aname not in attr:
1755
# Replace the class with a new subclass of it with
1756
# methods, signals, etc. as created above.
1757
if sys.version_info.major == 2:
1758
cls = type(b"{}Alternate".format(cls.__name__),
1761
cls = type("{}Alternate".format(cls.__name__),
1768
@alternate_dbus_interfaces({"se.recompile.Mandos":
1769
"se.bsnet.fukt.Mandos"})
940
1770
class ClientDBus(Client, DBusObjectWithProperties):
941
1771
"""A Client class using D-Bus
944
1774
dbus_object_path: dbus.ObjectPath
945
1775
bus: dbus.SystemBus()
948
1778
runtime_expansions = (Client.runtime_expansions
949
+ ("dbus_object_path",))
1779
+ ("dbus_object_path", ))
1781
_interface = "se.recompile.Mandos.Client"
951
1783
# dbus.service.Object doesn't use super(), so we can't either.
953
def __init__(self, bus = None, *args, **kwargs):
1785
def __init__(self, bus=None, *args, **kwargs):
955
self._approvals_pending = 0
956
1787
Client.__init__(self, *args, **kwargs)
959
def add_to_dbus(self):
960
1788
# Only now, when this client is initialized, can it show up on
962
client_object_name = unicode(self.name).translate(
1790
client_object_name = str(self.name).translate(
963
1791
{ord("."): ord("_"),
964
1792
ord("-"): ord("_")})
965
self.dbus_object_path = (dbus.ObjectPath
966
("/clients/" + client_object_name))
1793
self.dbus_object_path = dbus.ObjectPath(
1794
"/clients/" + client_object_name)
967
1795
DBusObjectWithProperties.__init__(self, self.bus,
968
1796
self.dbus_object_path)
970
def notifychangeproperty(transform_func,
971
dbus_name, type_func=lambda x: x,
1798
def notifychangeproperty(transform_func, dbus_name,
1799
type_func=lambda x: x,
1801
invalidate_only=False,
1802
_interface=_interface):
973
1803
""" Modify a variable so that it's a property which announces
974
1804
its changes to DBus.
1326
2199
self.start_checker()
1328
2201
self.stop_checker()
1330
2203
# ObjectPath - property
2205
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2206
"org.freedesktop.DBus.Deprecated": "true"})
1331
2207
@dbus_service_property(_interface, signature="o", access="read")
1332
2208
def ObjectPath_dbus_property(self):
1333
return self.dbus_object_path # is already a dbus.ObjectPath
2209
return self.dbus_object_path # is already a dbus.ObjectPath
1335
2211
# Secret = property
1336
@dbus_service_property(_interface, signature="ay",
1337
access="write", byte_arrays=True)
2213
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2215
@dbus_service_property(_interface,
1338
2219
def Secret_dbus_property(self, value):
1339
self.secret = str(value)
2220
self.secret = bytes(value)
1344
class ProxyClient(object):
1345
def __init__(self, child_pipe, fpr, address):
2226
def __init__(self, child_pipe, key_id, fpr, address):
1346
2227
self._pipe = child_pipe
1347
self._pipe.send(('init', fpr, address))
2228
self._pipe.send(('init', key_id, fpr, address))
1348
2229
if not self._pipe.recv():
2230
raise KeyError(key_id or fpr)
1351
2232
def __getattribute__(self, name):
1352
if(name == '_pipe'):
1353
2234
return super(ProxyClient, self).__getattribute__(name)
1354
2235
self._pipe.send(('getattr', name))
1355
2236
data = self._pipe.recv()
1356
2237
if data[0] == 'data':
1358
2239
if data[0] == 'function':
1359
2241
def func(*args, **kwargs):
1360
2242
self._pipe.send(('funcall', name, args, kwargs))
1361
2243
return self._pipe.recv()[1]
1364
2247
def __setattr__(self, name, value):
1365
if(name == '_pipe'):
1366
2249
return super(ProxyClient, self).__setattr__(name, value)
1367
2250
self._pipe.send(('setattr', name, value))
1369
class ClientDBusTransitional(ClientDBus):
1370
__metaclass__ = AlternateDBusNamesMetaclass
1372
2253
class ClientHandler(socketserver.BaseRequestHandler, object):
1373
2254
"""A class to handle client connections.
1375
2256
Instantiated once for each connection to handle it.
1376
2257
Note: This will run in its own forked process."""
1378
2259
def handle(self):
1379
2260
with contextlib.closing(self.server.child_pipe) as child_pipe:
1380
2261
logger.info("TCP connection from: %s",
1381
unicode(self.client_address))
2262
str(self.client_address))
1382
2263
logger.debug("Pipe FD: %d",
1383
2264
self.server.child_pipe.fileno())
1385
session = (gnutls.connection
1386
.ClientSession(self.request,
1388
.X509Credentials()))
1390
# Note: gnutls.connection.X509Credentials is really a
1391
# generic GnuTLS certificate credentials object so long as
1392
# no X.509 keys are added to it. Therefore, we can use it
1393
# here despite using OpenPGP certificates.
1395
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1396
# "+AES-256-CBC", "+SHA1",
1397
# "+COMP-NULL", "+CTYPE-OPENPGP",
2266
session = gnutls.ClientSession(self.request)
2268
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2269
# "+AES-256-CBC", "+SHA1",
2270
# "+COMP-NULL", "+CTYPE-OPENPGP",
1399
2272
# Use a fallback default, since this MUST be set.
1400
2273
priority = self.server.gnutls_priority
1401
2274
if priority is None:
1402
2275
priority = "NORMAL"
1403
(gnutls.library.functions
1404
.gnutls_priority_set_direct(session._c_object,
2276
gnutls.priority_set_direct(session._c_object,
2277
priority.encode("utf-8"),
1407
2280
# Start communication using the Mandos protocol
1408
2281
# Get protocol number
1409
2282
line = self.request.makefile().readline()
1410
2283
logger.debug("Protocol version: %r", line)
1412
2285
if int(line.strip().split()[0]) > 1:
2286
raise RuntimeError(line)
1414
2287
except (ValueError, IndexError, RuntimeError) as error:
1415
2288
logger.error("Unknown protocol version: %s", error)
1418
2291
# Start GnuTLS connection
1420
2293
session.handshake()
1421
except gnutls.errors.GNUTLSError as error:
2294
except gnutls.Error as error:
1422
2295
logger.warning("Handshake failed: %s", error)
1423
2296
# Do not run session.bye() here: the session is not
1424
2297
# established. Just abandon the request.
1426
2299
logger.debug("Handshake succeeded")
1428
2301
approval_required = False
1431
fpr = self.fingerprint(self.peer_certificate
1434
gnutls.errors.GNUTLSError) as error:
1435
logger.warning("Bad certificate: %s", error)
1437
logger.debug("Fingerprint: %s", fpr)
1440
client = ProxyClient(child_pipe, fpr,
2303
if gnutls.has_rawpk:
2306
key_id = self.key_id(
2307
self.peer_certificate(session))
2308
except (TypeError, gnutls.Error) as error:
2309
logger.warning("Bad certificate: %s", error)
2311
logger.debug("Key ID: %s", key_id)
2316
fpr = self.fingerprint(
2317
self.peer_certificate(session))
2318
except (TypeError, gnutls.Error) as error:
2319
logger.warning("Bad certificate: %s", error)
2321
logger.debug("Fingerprint: %s", fpr)
2324
client = ProxyClient(child_pipe, key_id, fpr,
1441
2325
self.client_address)
1442
2326
except KeyError:
1445
2329
if client.approval_delay:
1446
2330
delay = client.approval_delay
1447
2331
client.approvals_pending += 1
1448
2332
approval_required = True
1451
2335
if not client.enabled:
1452
2336
logger.info("Client %s is disabled",
1454
2338
if self.server.use_dbus:
1455
2339
# Emit D-Bus signal
1456
2340
client.Rejected("Disabled")
1459
if client._approved or not client.approval_delay:
1460
#We are approved or approval is disabled
2343
if client.approved or not client.approval_delay:
2344
# We are approved or approval is disabled
1462
elif client._approved is None:
2346
elif client.approved is None:
1463
2347
logger.info("Client %s needs approval",
1465
2349
if self.server.use_dbus:
1466
2350
# Emit D-Bus signal
1467
2351
client.NeedApproval(
1468
client.approval_delay_milliseconds(),
1469
client.approved_by_default)
2352
client.approval_delay.total_seconds()
2353
* 1000, client.approved_by_default)
1471
2355
logger.warning("Client %s was not approved",
1498
2380
delay -= time2 - time
1501
while sent_size < len(client.secret):
1503
sent = session.send(client.secret[sent_size:])
1504
except gnutls.errors.GNUTLSError as error:
1505
logger.warning("gnutls send failed")
1507
logger.debug("Sent: %d, remaining: %d",
1508
sent, len(client.secret)
1509
- (sent_size + sent))
2383
session.send(client.secret)
2384
except gnutls.Error as error:
2385
logger.warning("gnutls send failed",
1512
2389
logger.info("Sending secret to %s", client.name)
1513
2390
# bump the timeout using extended_timeout
1514
client.checked_ok(client.extended_timeout)
2391
client.bump_timeout(client.extended_timeout)
1515
2392
if self.server.use_dbus:
1516
2393
# Emit D-Bus signal
1517
2394
client.GotSecret()
1520
2397
if approval_required:
1521
2398
client.approvals_pending -= 1
1524
except gnutls.errors.GNUTLSError as error:
1525
logger.warning("GnuTLS bye failed")
2401
except gnutls.Error as error:
2402
logger.warning("GnuTLS bye failed",
1528
2406
def peer_certificate(session):
1529
"Return the peer's OpenPGP certificate as a bytestring"
1530
# If not an OpenPGP certificate...
1531
if (gnutls.library.functions
1532
.gnutls_certificate_type_get(session._c_object)
1533
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1534
# ...do the normal thing
1535
return session.peer_certificate
2407
"Return the peer's certificate as a bytestring"
2409
cert_type = gnutls.certificate_type_get2(session._c_object,
2411
except AttributeError:
2412
cert_type = gnutls.certificate_type_get(session._c_object)
2413
if gnutls.has_rawpk:
2414
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2416
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2417
# If not a valid certificate type...
2418
if cert_type not in valid_cert_types:
2419
logger.info("Cert type %r not in %r", cert_type,
2421
# ...return invalid data
1536
2423
list_size = ctypes.c_uint(1)
1537
cert_list = (gnutls.library.functions
1538
.gnutls_certificate_get_peers
2424
cert_list = (gnutls.certificate_get_peers
1539
2425
(session._c_object, ctypes.byref(list_size)))
1540
2426
if not bool(cert_list) and list_size.value != 0:
1541
raise gnutls.errors.GNUTLSError("error getting peer"
2427
raise gnutls.Error("error getting peer certificate")
1543
2428
if list_size.value == 0:
1545
2430
cert = cert_list[0]
1546
2431
return ctypes.string_at(cert.data, cert.size)
2434
def key_id(certificate):
2435
"Convert a certificate bytestring to a hexdigit key ID"
2436
# New GnuTLS "datum" with the public key
2437
datum = gnutls.datum_t(
2438
ctypes.cast(ctypes.c_char_p(certificate),
2439
ctypes.POINTER(ctypes.c_ubyte)),
2440
ctypes.c_uint(len(certificate)))
2441
# XXX all these need to be created in the gnutls "module"
2442
# New empty GnuTLS certificate
2443
pubkey = gnutls.pubkey_t()
2444
gnutls.pubkey_init(ctypes.byref(pubkey))
2445
# Import the raw public key into the certificate
2446
gnutls.pubkey_import(pubkey,
2447
ctypes.byref(datum),
2448
gnutls.X509_FMT_DER)
2449
# New buffer for the key ID
2450
buf = ctypes.create_string_buffer(32)
2451
buf_len = ctypes.c_size_t(len(buf))
2452
# Get the key ID from the raw public key into the buffer
2453
gnutls.pubkey_get_key_id(pubkey,
2454
gnutls.KEYID_USE_SHA256,
2455
ctypes.cast(ctypes.byref(buf),
2456
ctypes.POINTER(ctypes.c_ubyte)),
2457
ctypes.byref(buf_len))
2458
# Deinit the certificate
2459
gnutls.pubkey_deinit(pubkey)
2461
# Convert the buffer to a Python bytestring
2462
key_id = ctypes.string_at(buf, buf_len.value)
2463
# Convert the bytestring to hexadecimal notation
2464
hex_key_id = binascii.hexlify(key_id).upper()
1549
2468
def fingerprint(openpgp):
1550
2469
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1551
2470
# New GnuTLS "datum" with the OpenPGP public key
1552
datum = (gnutls.library.types
1553
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1556
ctypes.c_uint(len(openpgp))))
2471
datum = gnutls.datum_t(
2472
ctypes.cast(ctypes.c_char_p(openpgp),
2473
ctypes.POINTER(ctypes.c_ubyte)),
2474
ctypes.c_uint(len(openpgp)))
1557
2475
# New empty GnuTLS certificate
1558
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1559
(gnutls.library.functions
1560
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2476
crt = gnutls.openpgp_crt_t()
2477
gnutls.openpgp_crt_init(ctypes.byref(crt))
1561
2478
# Import the OpenPGP public key into the certificate
1562
(gnutls.library.functions
1563
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1564
gnutls.library.constants
1565
.GNUTLS_OPENPGP_FMT_RAW))
2479
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2480
gnutls.OPENPGP_FMT_RAW)
1566
2481
# Verify the self signature in the key
1567
2482
crtverify = ctypes.c_uint()
1568
(gnutls.library.functions
1569
.gnutls_openpgp_crt_verify_self(crt, 0,
1570
ctypes.byref(crtverify)))
2483
gnutls.openpgp_crt_verify_self(crt, 0,
2484
ctypes.byref(crtverify))
1571
2485
if crtverify.value != 0:
1572
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1573
raise (gnutls.errors.CertificateSecurityError
2486
gnutls.openpgp_crt_deinit(crt)
2487
raise gnutls.CertificateSecurityError(code
1575
2489
# New buffer for the fingerprint
1576
2490
buf = ctypes.create_string_buffer(20)
1577
2491
buf_len = ctypes.c_size_t()
1578
2492
# Get the fingerprint from the certificate into the buffer
1579
(gnutls.library.functions
1580
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1581
ctypes.byref(buf_len)))
2493
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2494
ctypes.byref(buf_len))
1582
2495
# Deinit the certificate
1583
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2496
gnutls.openpgp_crt_deinit(crt)
1584
2497
# Convert the buffer to a Python bytestring
1585
2498
fpr = ctypes.string_at(buf, buf_len.value)
1586
2499
# Convert the bytestring to hexadecimal notation
1587
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2500
hex_fpr = binascii.hexlify(fpr).upper()
1591
class MultiprocessingMixIn(object):
2504
class MultiprocessingMixIn:
1592
2505
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1593
2507
def sub_process_main(self, request, address):
1595
2509
self.finish_request(request, address)
1597
2511
self.handle_error(request, address)
1598
2512
self.close_request(request)
1600
2514
def process_request(self, request, address):
1601
2515
"""Start a new process to process the request."""
1602
proc = multiprocessing.Process(target = self.sub_process_main,
2516
proc = multiprocessing.Process(target=self.sub_process_main,
2517
args=(request, address))
1609
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2522
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
1610
2523
""" adds a pipe to the MixIn """
1611
2525
def process_request(self, request, client_address):
1612
2526
"""Overrides and wraps the original process_request().
1614
2528
This function creates a new pipe in self.pipe
1616
2530
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1618
2532
proc = MultiprocessingMixIn.process_request(self, request,
1619
2533
client_address)
1620
2534
self.child_pipe.close()
1621
2535
self.add_pipe(parent_pipe, proc)
1623
2537
def add_pipe(self, parent_pipe, proc):
1624
2538
"""Dummy function; override as necessary"""
1625
raise NotImplementedError
2539
raise NotImplementedError()
1628
2542
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1629
socketserver.TCPServer, object):
2543
socketserver.TCPServer):
1630
2544
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1633
2547
enabled: Boolean; whether this server is activated yet
1634
2548
interface: None or a network interface name (string)
1635
2549
use_ipv6: Boolean; to use IPv6 or not
1637
2552
def __init__(self, server_address, RequestHandlerClass,
1638
interface=None, use_ipv6=True):
2556
"""If socketfd is set, use that file descriptor instead of
2557
creating a new one with socket.socket().
1639
2559
self.interface = interface
1641
2561
self.address_family = socket.AF_INET6
2562
if socketfd is not None:
2563
# Save the file descriptor
2564
self.socketfd = socketfd
2565
# Save the original socket.socket() function
2566
self.socket_socket = socket.socket
2568
# To implement --socket, we monkey patch socket.socket.
2570
# (When socketserver.TCPServer is a new-style class, we
2571
# could make self.socket into a property instead of monkey
2572
# patching socket.socket.)
2574
# Create a one-time-only replacement for socket.socket()
2575
@functools.wraps(socket.socket)
2576
def socket_wrapper(*args, **kwargs):
2577
# Restore original function so subsequent calls are
2579
socket.socket = self.socket_socket
2580
del self.socket_socket
2581
# This time only, return a new socket object from the
2582
# saved file descriptor.
2583
return socket.fromfd(self.socketfd, *args, **kwargs)
2584
# Replace socket.socket() function with wrapper
2585
socket.socket = socket_wrapper
2586
# The socketserver.TCPServer.__init__ will call
2587
# socket.socket(), which might be our replacement,
2588
# socket_wrapper(), if socketfd was set.
1642
2589
socketserver.TCPServer.__init__(self, server_address,
1643
2590
RequestHandlerClass)
1644
2592
def server_bind(self):
1645
2593
"""This overrides the normal server_bind() function
1646
2594
to bind to an interface if one was specified, and also NOT to
1647
2595
bind to an address or port if they were not specified."""
2596
global SO_BINDTODEVICE
1648
2597
if self.interface is not None:
1649
2598
if SO_BINDTODEVICE is None:
1650
logger.error("SO_BINDTODEVICE does not exist;"
1651
" cannot bind to interface %s",
1655
self.socket.setsockopt(socket.SOL_SOCKET,
1659
except socket.error as error:
1660
if error[0] == errno.EPERM:
1661
logger.error("No permission to"
1662
" bind to interface %s",
1664
elif error[0] == errno.ENOPROTOOPT:
1665
logger.error("SO_BINDTODEVICE not available;"
1666
" cannot bind to interface %s",
2599
# Fall back to a hard-coded value which seems to be
2601
logger.warning("SO_BINDTODEVICE not found, trying 25")
2602
SO_BINDTODEVICE = 25
2604
self.socket.setsockopt(
2605
socket.SOL_SOCKET, SO_BINDTODEVICE,
2606
(self.interface + "\0").encode("utf-8"))
2607
except socket.error as error:
2608
if error.errno == errno.EPERM:
2609
logger.error("No permission to bind to"
2610
" interface %s", self.interface)
2611
elif error.errno == errno.ENOPROTOOPT:
2612
logger.error("SO_BINDTODEVICE not available;"
2613
" cannot bind to interface %s",
2615
elif error.errno == errno.ENODEV:
2616
logger.error("Interface %s does not exist,"
2617
" cannot bind", self.interface)
1670
2620
# Only bind(2) the socket if we really need to.
1671
2621
if self.server_address[0] or self.server_address[1]:
2622
if self.server_address[1]:
2623
self.allow_reuse_address = True
1672
2624
if not self.server_address[0]:
1673
2625
if self.address_family == socket.AF_INET6:
1674
any_address = "::" # in6addr_any
2626
any_address = "::" # in6addr_any
1676
any_address = socket.INADDR_ANY
2628
any_address = "0.0.0.0" # INADDR_ANY
1677
2629
self.server_address = (any_address,
1678
2630
self.server_address[1])
1679
2631
elif not self.server_address[1]:
1680
self.server_address = (self.server_address[0],
2632
self.server_address = (self.server_address[0], 0)
1682
2633
# if self.interface:
1683
2634
# self.server_address = (self.server_address[0],
1929
2962
parser.add_argument("--no-dbus", action="store_false",
1930
2963
dest="use_dbus", help="Do not provide D-Bus"
1931
" system bus interface")
2964
" system bus interface", default=None)
1932
2965
parser.add_argument("--no-ipv6", action="store_false",
1933
dest="use_ipv6", help="Do not use IPv6")
2966
dest="use_ipv6", help="Do not use IPv6",
1934
2968
parser.add_argument("--no-restore", action="store_false",
1936
help="Do not restore stored state",
2969
dest="restore", help="Do not restore stored"
2970
" state", default=None)
2971
parser.add_argument("--socket", type=int,
2972
help="Specify a file descriptor to a network"
2973
" socket to use instead of creating one")
2974
parser.add_argument("--statedir", metavar="DIR",
2975
help="Directory to save/restore state in")
2976
parser.add_argument("--foreground", action="store_true",
2977
help="Run in foreground", default=None)
2978
parser.add_argument("--no-zeroconf", action="store_false",
2979
dest="zeroconf", help="Do not use Zeroconf",
1939
2982
options = parser.parse_args()
1946
2984
# Default values for config file for server-global settings
1947
server_defaults = { "interface": "",
1952
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1953
"servicename": "Mandos",
2985
if gnutls.has_rawpk:
2986
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2987
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2989
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2990
":+SIGN-DSA-SHA256")
2991
server_defaults = {"interface": "",
2995
"priority": priority,
2996
"servicename": "Mandos",
3002
"statedir": "/var/lib/mandos",
3003
"foreground": "False",
1959
3008
# Parse config file for server-global settings
1960
server_config = configparser.SafeConfigParser(server_defaults)
3009
server_config = configparser.ConfigParser(server_defaults)
1961
3010
del server_defaults
1962
server_config.read(os.path.join(options.configdir,
1964
# Convert the SafeConfigParser object to a dict
3011
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3012
# Convert the ConfigParser object to a dict
1965
3013
server_settings = server_config.defaults()
1966
3014
# Use the appropriate methods on the non-string config options
1967
for option in ("debug", "use_dbus", "use_ipv6"):
3015
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3016
"foreground", "zeroconf"):
1968
3017
server_settings[option] = server_config.getboolean("DEFAULT",
1970
3019
if server_settings["port"]:
1971
3020
server_settings["port"] = server_config.getint("DEFAULT",
3022
if server_settings["socket"]:
3023
server_settings["socket"] = server_config.getint("DEFAULT",
3025
# Later, stdin will, and stdout and stderr might, be dup'ed
3026
# over with an opened os.devnull. But we don't want this to
3027
# happen with a supplied network socket.
3028
if 0 <= server_settings["socket"] <= 2:
3029
server_settings["socket"] = os.dup(server_settings
1973
3031
del server_config
1975
3033
# Override the settings from the config file with command line
1976
3034
# options, if set.
1977
3035
for option in ("interface", "address", "port", "debug",
1978
"priority", "servicename", "configdir",
1979
"use_dbus", "use_ipv6", "debuglevel", "restore"):
3036
"priority", "servicename", "configdir", "use_dbus",
3037
"use_ipv6", "debuglevel", "restore", "statedir",
3038
"socket", "foreground", "zeroconf"):
1980
3039
value = getattr(options, option)
1981
3040
if value is not None:
1982
3041
server_settings[option] = value
1984
3043
# Force all strings to be unicode
1985
3044
for option in server_settings.keys():
1986
if type(server_settings[option]) is str:
1987
server_settings[option] = unicode(server_settings[option])
3045
if isinstance(server_settings[option], bytes):
3046
server_settings[option] = (server_settings[option]
3048
# Force all boolean options to be boolean
3049
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3050
"foreground", "zeroconf"):
3051
server_settings[option] = bool(server_settings[option])
3052
# Debug implies foreground
3053
if server_settings["debug"]:
3054
server_settings["foreground"] = True
1988
3055
# Now we have our good server settings in "server_settings"
1990
3057
##################################################################
3059
if (not server_settings["zeroconf"]
3060
and not (server_settings["port"]
3061
or server_settings["socket"] != "")):
3062
parser.error("Needs port or socket to work without Zeroconf")
1992
3064
# For convenience
1993
3065
debug = server_settings["debug"]
1994
3066
debuglevel = server_settings["debuglevel"]
1995
3067
use_dbus = server_settings["use_dbus"]
1996
3068
use_ipv6 = server_settings["use_ipv6"]
3069
stored_state_path = os.path.join(server_settings["statedir"],
3071
foreground = server_settings["foreground"]
3072
zeroconf = server_settings["zeroconf"]
3075
initlogger(debug, logging.DEBUG)
3080
level = getattr(logging, debuglevel.upper())
3081
initlogger(debug, level)
1998
3083
if server_settings["servicename"] != "Mandos":
1999
syslogger.setFormatter(logging.Formatter
2000
('Mandos (%s) [%%(process)d]:'
2001
' %%(levelname)s: %%(message)s'
2002
% server_settings["servicename"]))
3084
syslogger.setFormatter(
3085
logging.Formatter('Mandos ({}) [%(process)d]:'
3086
' %(levelname)s: %(message)s'.format(
3087
server_settings["servicename"])))
2004
3089
# Parse config file with clients
2005
client_defaults = { "timeout": "5m",
2006
"extended_timeout": "15m",
2008
"checker": "fping -q -- %%(host)s",
2010
"approval_delay": "0s",
2011
"approval_duration": "1s",
2013
client_config = configparser.SafeConfigParser(client_defaults)
3090
client_config = configparser.ConfigParser(Client.client_defaults)
2014
3091
client_config.read(os.path.join(server_settings["configdir"],
2015
3092
"clients.conf"))
2017
3094
global mandos_dbus_service
2018
3095
mandos_dbus_service = None
2020
tcp_server = MandosServer((server_settings["address"],
2021
server_settings["port"]),
2023
interface=(server_settings["interface"]
2027
server_settings["priority"],
2030
pidfilename = "/var/run/mandos.pid"
2032
pidfile = open(pidfilename, "w")
2034
logger.error("Could not open file %r", pidfilename)
2037
uid = pwd.getpwnam("_mandos").pw_uid
2038
gid = pwd.getpwnam("_mandos").pw_gid
2041
uid = pwd.getpwnam("mandos").pw_uid
2042
gid = pwd.getpwnam("mandos").pw_gid
3098
if server_settings["socket"] != "":
3099
socketfd = server_settings["socket"]
3100
tcp_server = MandosServer(
3101
(server_settings["address"], server_settings["port"]),
3103
interface=(server_settings["interface"] or None),
3105
gnutls_priority=server_settings["priority"],
3109
pidfilename = "/run/mandos.pid"
3110
if not os.path.isdir("/run/."):
3111
pidfilename = "/var/run/mandos.pid"
3114
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3115
except IOError as e:
3116
logger.error("Could not open file %r", pidfilename,
3119
for name, group in (("_mandos", "_mandos"),
3120
("mandos", "mandos"),
3121
("nobody", "nogroup")):
3123
uid = pwd.getpwnam(name).pw_uid
3124
gid = pwd.getpwnam(group).pw_gid
2043
3126
except KeyError:
2045
uid = pwd.getpwnam("nobody").pw_uid
2046
gid = pwd.getpwnam("nobody").pw_gid
3135
logger.debug("Did setuid/setgid to {}:{}".format(uid,
2053
3137
except OSError as error:
2054
if error[0] != errno.EPERM:
2057
if not debug and not debuglevel:
2058
logger.setLevel(logging.WARNING)
2060
level = getattr(logging, debuglevel.upper())
2061
logger.setLevel(level)
3138
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3139
.format(uid, gid, os.strerror(error.errno)))
3140
if error.errno != errno.EPERM:
2064
logger.setLevel(logging.DEBUG)
2065
3144
# Enable all possible GnuTLS debugging
2067
3146
# "Use a log level over 10 to enable all debugging options."
2068
3147
# - GnuTLS manual
2069
gnutls.library.functions.gnutls_global_set_log_level(11)
2071
@gnutls.library.types.gnutls_log_func
3148
gnutls.global_set_log_level(11)
2072
3151
def debug_gnutls(level, string):
2073
3152
logger.debug("GnuTLS: %s", string[:-1])
2075
(gnutls.library.functions
2076
.gnutls_global_set_log_function(debug_gnutls))
3154
gnutls.global_set_log_function(debug_gnutls)
2078
3156
# Redirect stdin so all checkers get /dev/null
2079
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3157
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2080
3158
os.dup2(null, sys.stdin.fileno())
2084
# No console logging
2085
logger.removeHandler(console)
2087
3162
# Need to fork before connecting to D-Bus
2089
3164
# Close all input and output, do double fork, etc.
3167
if gi.version_info < (3, 10, 2):
3168
# multiprocessing will use threads, so before we use GLib we
3169
# need to inform GLib that threads will be used.
2092
3172
global main_loop
2093
3173
# From the Avahi example code
2094
DBusGMainLoop(set_as_default=True )
2095
main_loop = gobject.MainLoop()
3174
DBusGMainLoop(set_as_default=True)
3175
main_loop = GLib.MainLoop()
2096
3176
bus = dbus.SystemBus()
2097
3177
# End of Avahi example code
2100
3180
bus_name = dbus.service.BusName("se.recompile.Mandos",
2101
bus, do_not_queue=True)
2102
old_bus_name = (dbus.service.BusName
2103
("se.bsnet.fukt.Mandos", bus,
2105
except dbus.exceptions.NameExistsException as e:
2106
logger.error(unicode(e) + ", disabling D-Bus")
3183
old_bus_name = dbus.service.BusName(
3184
"se.bsnet.fukt.Mandos", bus,
3186
except dbus.exceptions.DBusException as e:
3187
logger.error("Disabling D-Bus:", exc_info=e)
2107
3188
use_dbus = False
2108
3189
server_settings["use_dbus"] = False
2109
3190
tcp_server.use_dbus = False
2110
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2111
service = AvahiServiceToSyslog(name =
2112
server_settings["servicename"],
2113
servicetype = "_mandos._tcp",
2114
protocol = protocol, bus = bus)
2115
if server_settings["interface"]:
2116
service.interface = (if_nametoindex
2117
(str(server_settings["interface"])))
3192
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3193
service = AvahiServiceToSyslog(
3194
name=server_settings["servicename"],
3195
servicetype="_mandos._tcp",
3198
if server_settings["interface"]:
3199
service.interface = if_nametoindex(
3200
server_settings["interface"].encode("utf-8"))
2119
3202
global multiprocessing_manager
2120
3203
multiprocessing_manager = multiprocessing.Manager()
2122
3205
client_class = Client
2124
client_class = functools.partial(ClientDBusTransitional,
2127
special_settings = {
2128
# Some settings need to be accessd by special methods;
2129
# booleans need .getboolean(), etc. Here is a list of them:
2130
"approved_by_default":
2132
client_config.getboolean(section, "approved_by_default"),
2134
# Construct a new dict of client settings of this form:
2135
# { client_name: {setting_name: value, ...}, ...}
2136
# with exceptions for any special settings as defined above
2137
client_settings = dict((clientname,
2140
setting not in special_settings
2141
else special_settings[setting]
2144
in client_config.items(clientname)))
2145
for clientname in client_config.sections())
3207
client_class = functools.partial(ClientDBus, bus=bus)
3209
client_settings = Client.config_parser(client_config)
2147
3210
old_client_settings = {}
2150
# Get client data and settings from last running state.
3213
# This is used to redirect stdout and stderr for checker processes
3215
wnull = open(os.devnull, "w") # A writable /dev/null
3216
# Only used if server is running in foreground but not in debug
3218
if debug or not foreground:
3221
# Get client data and settings from last running state.
2151
3222
if server_settings["restore"]:
2153
3224
with open(stored_state_path, "rb") as stored_state:
2154
clients_data, old_client_settings = (
2155
pickle.load(stored_state))
3225
if sys.version_info.major == 2:
3226
clients_data, old_client_settings = pickle.load(
3229
bytes_clients_data, bytes_old_client_settings = (
3230
pickle.load(stored_state, encoding="bytes"))
3231
# Fix bytes to strings
3234
clients_data = {(key.decode("utf-8")
3235
if isinstance(key, bytes)
3238
bytes_clients_data.items()}
3239
del bytes_clients_data
3240
for key in clients_data:
3241
value = {(k.decode("utf-8")
3242
if isinstance(k, bytes) else k): v
3244
clients_data[key].items()}
3245
clients_data[key] = value
3247
value["client_structure"] = [
3249
if isinstance(s, bytes)
3251
value["client_structure"]]
3252
# .name, .host, and .checker_command
3253
for k in ("name", "host", "checker_command"):
3254
if isinstance(value[k], bytes):
3255
value[k] = value[k].decode("utf-8")
3256
if "key_id" not in value:
3257
value["key_id"] = ""
3258
elif "fingerprint" not in value:
3259
value["fingerprint"] = ""
3260
# old_client_settings
3262
old_client_settings = {
3263
(key.decode("utf-8")
3264
if isinstance(key, bytes)
3267
bytes_old_client_settings.items()}
3268
del bytes_old_client_settings
3269
# .host and .checker_command
3270
for value in old_client_settings.values():
3271
for attribute in ("host", "checker_command"):
3272
if isinstance(value[attribute], bytes):
3273
value[attribute] = (value[attribute]
2156
3275
os.remove(stored_state_path)
2157
3276
except IOError as e:
2158
logger.warning("Could not load persistant state: {0}"
2160
if e.errno != errno.ENOENT:
3277
if e.errno == errno.ENOENT:
3278
logger.warning("Could not load persistent state:"
3279
" {}".format(os.strerror(e.errno)))
3281
logger.critical("Could not load persistent state:",
2163
for client in clients_data:
2164
client_name = client["name"]
2166
# Decide which value to use after restoring saved state.
2167
# We have three different values: Old config file,
2168
# new config file, and saved state.
2169
# New config value takes precedence if it differs from old
2170
# config value, otherwise use saved state.
2171
for name, value in client_settings[client_name].items():
3284
except EOFError as e:
3285
logger.warning("Could not load persistent state: "
3289
with PGPEngine() as pgp:
3290
for client_name, client in clients_data.items():
3291
# Skip removed clients
3292
if client_name not in client_settings:
3295
# Decide which value to use after restoring saved state.
3296
# We have three different values: Old config file,
3297
# new config file, and saved state.
3298
# New config value takes precedence if it differs from old
3299
# config value, otherwise use saved state.
3300
for name, value in client_settings[client_name].items():
3302
# For each value in new config, check if it
3303
# differs from the old config value (Except for
3304
# the "secret" attribute)
3305
if (name != "secret"
3307
old_client_settings[client_name][name])):
3308
client[name] = value
3312
# Clients who has passed its expire date can still be
3313
# enabled if its last checker was successful. A Client
3314
# whose checker succeeded before we stored its state is
3315
# assumed to have successfully run all checkers during
3317
if client["enabled"]:
3318
if datetime.datetime.utcnow() >= client["expires"]:
3319
if not client["last_checked_ok"]:
3321
"disabling client {} - Client never "
3322
"performed a successful checker".format(
3324
client["enabled"] = False
3325
elif client["last_checker_status"] != 0:
3327
"disabling client {} - Client last"
3328
" checker failed with error code"
3331
client["last_checker_status"]))
3332
client["enabled"] = False
3334
client["expires"] = (
3335
datetime.datetime.utcnow()
3336
+ client["timeout"])
3337
logger.debug("Last checker succeeded,"
3338
" keeping {} enabled".format(
2173
# For each value in new config, check if it differs
2174
# from the old config value (Except for the "secret"
2176
if (name != "secret" and
2177
value != old_client_settings[client_name][name]):
2178
setattr(client, name, value)
2182
# Clients who has passed its expire date, can still be enabled
2183
# if its last checker was sucessful. Clients who checkers
2184
# failed before we stored it state is asumed to had failed
2185
# checker during downtime.
2186
if client["enabled"] and client["last_checked_ok"]:
2187
if ((datetime.datetime.utcnow()
2188
- client["last_checked_ok"]) > client["interval"]):
2189
if client["last_checker_status"] != 0:
2190
client["enabled"] = False
2192
client["expires"] = (datetime.datetime.utcnow()
2193
+ client["timeout"])
2195
client["changedstate"] = (multiprocessing_manager
2196
.Condition(multiprocessing_manager
2199
new_client = ClientDBusTransitional.__new__(
2200
ClientDBusTransitional)
2201
tcp_server.clients[client_name] = new_client
2202
new_client.bus = bus
2203
for name, value in client.iteritems():
2204
setattr(new_client, name, value)
2205
new_client._approvals_pending = 0
2206
new_client.add_to_dbus()
2208
tcp_server.clients[client_name] = Client.__new__(Client)
2209
for name, value in client.iteritems():
2210
setattr(tcp_server.clients[client_name], name, value)
2212
tcp_server.clients[client_name].decrypt_secret(
2213
client_settings[client_name]["secret"])
2215
# Create/remove clients based on new changes made to config
2216
for clientname in set(old_client_settings) - set(client_settings):
2217
del tcp_server.clients[clientname]
2218
for clientname in set(client_settings) - set(old_client_settings):
2219
tcp_server.clients[clientname] = client_class(name
3341
client["secret"] = pgp.decrypt(
3342
client["encrypted_secret"],
3343
client_settings[client_name]["secret"])
3345
# If decryption fails, we use secret from new settings
3346
logger.debug("Failed to decrypt {} old secret".format(
3348
client["secret"] = (client_settings[client_name]
3351
# Add/remove clients based on new changes made to config
3352
for client_name in (set(old_client_settings)
3353
- set(client_settings)):
3354
del clients_data[client_name]
3355
for client_name in (set(client_settings)
3356
- set(old_client_settings)):
3357
clients_data[client_name] = client_settings[client_name]
3359
# Create all client objects
3360
for client_name, client in clients_data.items():
3361
tcp_server.clients[client_name] = client_class(
3364
server_settings=server_settings)
2225
3366
if not tcp_server.clients:
2226
3367
logger.warning("No clients defined")
2232
pidfile.write(str(pid) + "\n".encode("utf-8"))
2235
logger.error("Could not write to file %r with PID %d",
2238
# "pidfile" was never created
3370
if pidfile is not None:
3374
print(pid, file=pidfile)
3376
logger.error("Could not write to file %r with PID %d",
2240
3379
del pidfilename
2242
signal.signal(signal.SIGINT, signal.SIG_IGN)
2244
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2245
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3381
for termsig in (signal.SIGHUP, signal.SIGTERM):
3382
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3383
lambda: main_loop.quit() and False)
2248
class MandosDBusService(dbus.service.Object):
3387
@alternate_dbus_interfaces(
3388
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3389
class MandosDBusService(DBusObjectWithObjectManager):
2249
3390
"""A D-Bus proxy object"""
2250
3392
def __init__(self):
2251
3393
dbus.service.Object.__init__(self, bus, "/")
2252
3395
_interface = "se.recompile.Mandos"
2254
3397
@dbus.service.signal(_interface, signature="o")
2255
3398
def ClientAdded(self, objpath):
2259
3402
@dbus.service.signal(_interface, signature="ss")
2260
def ClientNotFound(self, fingerprint, address):
3403
def ClientNotFound(self, key_id, address):
3407
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2264
3409
@dbus.service.signal(_interface, signature="os")
2265
3410
def ClientRemoved(self, objpath, name):
3414
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2269
3416
@dbus.service.method(_interface, out_signature="ao")
2270
3417
def GetAllClients(self):
2272
return dbus.Array(c.dbus_object_path
2274
tcp_server.clients.itervalues())
3419
return dbus.Array(c.dbus_object_path for c in
3420
tcp_server.clients.values())
3422
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2276
3424
@dbus.service.method(_interface,
2277
3425
out_signature="a{oa{sv}}")
2278
3426
def GetAllClientsWithProperties(self):
2280
3428
return dbus.Dictionary(
2281
((c.dbus_object_path, c.GetAll(""))
2282
for c in tcp_server.clients.itervalues()),
3429
{c.dbus_object_path: c.GetAll(
3430
"se.recompile.Mandos.Client")
3431
for c in tcp_server.clients.values()},
2283
3432
signature="oa{sv}")
2285
3434
@dbus.service.method(_interface, in_signature="o")
2286
3435
def RemoveClient(self, object_path):
2288
for c in tcp_server.clients.itervalues():
3437
for c in tcp_server.clients.values():
2289
3438
if c.dbus_object_path == object_path:
2290
3439
del tcp_server.clients[c.name]
2291
3440
c.remove_from_connection()
2292
# Don't signal anything except ClientRemoved
3441
# Don't signal the disabling
2293
3442
c.disable(quiet=True)
2295
self.ClientRemoved(object_path, c.name)
3443
# Emit D-Bus signal for removal
3444
self.client_removed_signal(c)
2297
3446
raise KeyError(object_path)
2301
class MandosDBusServiceTransitional(MandosDBusService):
2302
__metaclass__ = AlternateDBusNamesMetaclass
2303
mandos_dbus_service = MandosDBusServiceTransitional()
3450
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3451
out_signature="a{oa{sa{sv}}}")
3452
def GetManagedObjects(self):
3454
return dbus.Dictionary(
3455
{client.dbus_object_path:
3457
{interface: client.GetAll(interface)
3459
client._get_all_interface_names()})
3460
for client in tcp_server.clients.values()})
3462
def client_added_signal(self, client):
3463
"""Send the new standard signal and the old signal"""
3465
# New standard signal
3466
self.InterfacesAdded(
3467
client.dbus_object_path,
3469
{interface: client.GetAll(interface)
3471
client._get_all_interface_names()}))
3473
self.ClientAdded(client.dbus_object_path)
3475
def client_removed_signal(self, client):
3476
"""Send the new standard signal and the old signal"""
3478
# New standard signal
3479
self.InterfacesRemoved(
3480
client.dbus_object_path,
3481
client._get_all_interface_names())
3483
self.ClientRemoved(client.dbus_object_path,
3486
mandos_dbus_service = MandosDBusService()
3488
# Save modules to variables to exempt the modules from being
3489
# unloaded before the function registered with atexit() is run.
3490
mp = multiprocessing
2306
3494
"Cleanup function; run on exit"
2309
multiprocessing.active_children()
3498
mp.active_children()
2310
3500
if not (tcp_server.clients or client_settings):
2313
3503
# Store client before exiting. Secrets are encrypted with key
2314
3504
# based on what config file has. If config file is
2315
3505
# removed/edited, old secret will thus be unrecovable.
2317
for client in tcp_server.clients.itervalues():
2318
client.encrypt_secret(
2319
client_settings[client.name]["secret"])
2323
# A list of attributes that will not be stored when
2325
exclude = set(("bus", "changedstate", "secret"))
2326
for name, typ in inspect.getmembers(dbus.service.Object):
2329
client_dict["encrypted_secret"] = client.encrypted_secret
2330
for attr in client.client_structure:
2331
if attr not in exclude:
2332
client_dict[attr] = getattr(client, attr)
2334
clients.append(client_dict)
2335
del client_settings[client.name]["secret"]
3507
with PGPEngine() as pgp:
3508
for client in tcp_server.clients.values():
3509
key = client_settings[client.name]["secret"]
3510
client.encrypted_secret = pgp.encrypt(client.secret,
3514
# A list of attributes that can not be pickled
3516
exclude = {"bus", "changedstate", "secret",
3517
"checker", "server_settings"}
3518
for name, typ in inspect.getmembers(dbus.service
3522
client_dict["encrypted_secret"] = (client
3524
for attr in client.client_structure:
3525
if attr not in exclude:
3526
client_dict[attr] = getattr(client, attr)
3528
clients[client.name] = client_dict
3529
del client_settings[client.name]["secret"]
2338
with os.fdopen(os.open(stored_state_path,
2339
os.O_CREAT|os.O_WRONLY|os.O_TRUNC,
2340
stat.S_IRUSR | stat.S_IWUSR),
2341
"wb") as stored_state:
2342
pickle.dump((clients, client_settings), stored_state)
2343
except IOError as e:
2344
logger.warning("Could not save persistant state: {0}"
2346
if e.errno != errno.ENOENT:
3532
with tempfile.NamedTemporaryFile(
3536
dir=os.path.dirname(stored_state_path),
3537
delete=False) as stored_state:
3538
pickle.dump((clients, client_settings), stored_state,
3540
tempname = stored_state.name
3541
os.rename(tempname, stored_state_path)
3542
except (IOError, OSError) as e:
3548
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3549
logger.warning("Could not save persistent state: {}"
3550
.format(os.strerror(e.errno)))
3552
logger.warning("Could not save persistent state:",
2349
3556
# Delete all clients, and settings from config