70
import cPickle as pickle
63
import cPickle as pickle
73
64
import multiprocessing
82
69
import dbus.service
83
from gi.repository import GLib
84
72
from dbus.mainloop.glib import DBusGMainLoop
87
75
import xml.dom.minidom
77
import Crypto.Cipher.AES
90
# Try to find the value of SO_BINDTODEVICE:
92
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
93
# newer, and it is also the most natural place for it:
94
80
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
95
81
except AttributeError:
97
# This is where SO_BINDTODEVICE was up to and including Python
99
83
from IN import SO_BINDTODEVICE
100
84
except ImportError:
101
# In Python 2.7 it seems to have been removed entirely.
102
# Try running the C preprocessor:
104
cc = subprocess.Popen(["cc", "--language=c", "-E",
106
stdin=subprocess.PIPE,
107
stdout=subprocess.PIPE)
108
stdout = cc.communicate(
109
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
110
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
111
except (OSError, ValueError, IndexError):
113
SO_BINDTODEVICE = None
115
if sys.version_info.major == 2:
119
stored_state_file = "clients.pickle"
85
SO_BINDTODEVICE = None
121
90
logger = logging.getLogger()
125
if_nametoindex = ctypes.cdll.LoadLibrary(
126
ctypes.util.find_library("c")).if_nametoindex
127
except (OSError, AttributeError):
129
def if_nametoindex(interface):
130
"Get an interface index the hard way, i.e. using fcntl()"
131
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
132
with contextlib.closing(socket.socket()) as s:
133
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
134
struct.pack(b"16s16x", interface))
135
interface_index = struct.unpack("I", ifreq[16:20])[0]
136
return interface_index
139
def copy_function(func):
140
"""Make a copy of a function"""
141
if sys.version_info.major == 2:
142
return types.FunctionType(func.func_code,
148
return types.FunctionType(func.__code__,
155
def initlogger(debug, level=logging.WARNING):
156
"""init logger and add loglevel"""
159
syslogger = (logging.handlers.SysLogHandler(
160
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
162
syslogger.setFormatter(logging.Formatter
163
('Mandos [%(process)d]: %(levelname)s:'
165
logger.addHandler(syslogger)
168
console = logging.StreamHandler()
169
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
173
logger.addHandler(console)
174
logger.setLevel(level)
177
class PGPError(Exception):
178
"""Exception if encryption/decryption fails"""
182
class PGPEngine(object):
183
"""A simple class for OpenPGP symmetric encryption & decryption"""
186
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
189
output = subprocess.check_output(["gpgconf"])
190
for line in output.splitlines():
191
name, text, path = line.split(b":")
196
if e.errno != errno.ENOENT:
198
self.gnupgargs = ['--batch',
199
'--homedir', self.tempdir,
202
# Only GPG version 1 has the --no-use-agent option.
203
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
204
self.gnupgargs.append("--no-use-agent")
209
def __exit__(self, exc_type, exc_value, traceback):
217
if self.tempdir is not None:
218
# Delete contents of tempdir
219
for root, dirs, files in os.walk(self.tempdir,
221
for filename in files:
222
os.remove(os.path.join(root, filename))
224
os.rmdir(os.path.join(root, dirname))
226
os.rmdir(self.tempdir)
229
def password_encode(self, password):
230
# Passphrase can not be empty and can not contain newlines or
231
# NUL bytes. So we prefix it and hex encode it.
232
encoded = b"mandos" + binascii.hexlify(password)
233
if len(encoded) > 2048:
234
# GnuPG can't handle long passwords, so encode differently
235
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
236
.replace(b"\n", b"\\n")
237
.replace(b"\0", b"\\x00"))
240
def encrypt(self, data, password):
241
passphrase = self.password_encode(password)
242
with tempfile.NamedTemporaryFile(
243
dir=self.tempdir) as passfile:
244
passfile.write(passphrase)
246
proc = subprocess.Popen([self.gpg, '--symmetric',
250
stdin=subprocess.PIPE,
251
stdout=subprocess.PIPE,
252
stderr=subprocess.PIPE)
253
ciphertext, err = proc.communicate(input=data)
254
if proc.returncode != 0:
258
def decrypt(self, data, password):
259
passphrase = self.password_encode(password)
260
with tempfile.NamedTemporaryFile(
261
dir=self.tempdir) as passfile:
262
passfile.write(passphrase)
264
proc = subprocess.Popen([self.gpg, '--decrypt',
268
stdin=subprocess.PIPE,
269
stdout=subprocess.PIPE,
270
stderr=subprocess.PIPE)
271
decrypted_plaintext, err = proc.communicate(input=data)
272
if proc.returncode != 0:
274
return decrypted_plaintext
277
# Pretend that we have an Avahi module
279
"""This isn't so much a class as it is a module-like namespace.
280
It is instantiated once, and simulates having an Avahi module."""
281
IF_UNSPEC = -1 # avahi-common/address.h
282
PROTO_UNSPEC = -1 # avahi-common/address.h
283
PROTO_INET = 0 # avahi-common/address.h
284
PROTO_INET6 = 1 # avahi-common/address.h
285
DBUS_NAME = "org.freedesktop.Avahi"
286
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
287
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
288
DBUS_PATH_SERVER = "/"
290
def string_array_to_txt_array(self, t):
291
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
292
for s in t), signature="ay")
293
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
294
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
295
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
296
SERVER_INVALID = 0 # avahi-common/defs.h
297
SERVER_REGISTERING = 1 # avahi-common/defs.h
298
SERVER_RUNNING = 2 # avahi-common/defs.h
299
SERVER_COLLISION = 3 # avahi-common/defs.h
300
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)
304
109
class AvahiError(Exception):
305
110
def __init__(self, value, *args, **kwargs):
306
111
self.value = value
307
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))
311
116
class AvahiServiceError(AvahiError):
315
119
class AvahiGroupError(AvahiError):
319
123
class AvahiService(object):
320
124
"""An Avahi (Zeroconf) service.
323
127
interface: integer; avahi.IF_UNSPEC or an interface index.
324
128
Used to optionally bind to the specified interface.
325
129
name: string; Example: 'Mandos'
326
130
type: string; Example: '_mandos._tcp'.
327
See <https://www.iana.org/assignments/service-names-port-numbers>
131
See <http://www.dns-sd.org/ServiceTypes.html>
328
132
port: integer; what port to announce
329
133
TXT: list of strings; TXT record for the service
330
134
domain: string; Domain to publish on, default to .local if empty.
489
263
follow_name_owner_changes=True),
490
264
avahi.DBUS_INTERFACE_SERVER)
491
265
self.server.connect_to_signal("StateChanged",
492
self.server_state_changed)
266
self.server_state_changed)
493
267
self.server_state_changed(self.server.GetState())
496
269
class AvahiServiceToSyslog(AvahiService):
497
def rename(self, *args, **kwargs):
498
271
"""Add the new name to the syslog messages"""
499
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
500
syslogger.setFormatter(logging.Formatter(
501
'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'
506
# Pretend that we have a GnuTLS module
507
class GnuTLS(object):
508
"""This isn't so much a class as it is a module-like namespace.
509
It is instantiated once, and simulates having a GnuTLS module."""
511
library = ctypes.util.find_library("gnutls")
513
library = ctypes.util.find_library("gnutls-deb0")
514
_library = ctypes.cdll.LoadLibrary(library)
516
_need_version = b"3.3.0"
517
_tls_rawpk_version = b"3.6.6"
520
# Need to use "self" here, since this method is called before
521
# the assignment to the "gnutls" global variable happens.
522
if self.check_version(self._need_version) is None:
523
raise self.Error("Needs GnuTLS {} or later"
524
.format(self._need_version))
526
# Unless otherwise indicated, the constants and types below are
527
# all from the gnutls/gnutls.h C header file.
538
E_NO_CERTIFICATE_FOUND = -49
543
KEYID_USE_SHA256 = 1 # gnutls/x509.h
544
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
547
class session_int(ctypes.Structure):
549
session_t = ctypes.POINTER(session_int)
551
class certificate_credentials_st(ctypes.Structure):
553
certificate_credentials_t = ctypes.POINTER(
554
certificate_credentials_st)
555
certificate_type_t = ctypes.c_int
557
class datum_t(ctypes.Structure):
558
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
559
('size', ctypes.c_uint)]
561
class openpgp_crt_int(ctypes.Structure):
563
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
564
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
565
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
566
credentials_type_t = ctypes.c_int
567
transport_ptr_t = ctypes.c_void_p
568
close_request_t = ctypes.c_int
571
class Error(Exception):
572
# We need to use the class name "GnuTLS" here, since this
573
# exception might be raised from within GnuTLS.__init__,
574
# which is called before the assignment to the "gnutls"
575
# global variable has happened.
576
def __init__(self, message=None, code=None, args=()):
577
# Default usage is by a message string, but if a return
578
# code is passed, convert it to a string with
581
if message is None and code is not None:
582
message = GnuTLS.strerror(code)
583
return super(GnuTLS.Error, self).__init__(
586
class CertificateSecurityError(Error):
590
class Credentials(object):
592
self._c_object = gnutls.certificate_credentials_t()
593
gnutls.certificate_allocate_credentials(
594
ctypes.byref(self._c_object))
595
self.type = gnutls.CRD_CERTIFICATE
598
gnutls.certificate_free_credentials(self._c_object)
600
class ClientSession(object):
601
def __init__(self, socket, credentials=None):
602
self._c_object = gnutls.session_t()
603
gnutls_flags = gnutls.CLIENT
604
if gnutls.check_version("3.5.6"):
605
gnutls_flags |= gnutls.NO_TICKETS
607
gnutls_flags |= gnutls.ENABLE_RAWPK
608
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
610
gnutls.set_default_priority(self._c_object)
611
gnutls.transport_set_ptr(self._c_object, socket.fileno())
612
gnutls.handshake_set_private_extensions(self._c_object,
615
if credentials is None:
616
credentials = gnutls.Credentials()
617
gnutls.credentials_set(self._c_object, credentials.type,
618
ctypes.cast(credentials._c_object,
620
self.credentials = credentials
623
gnutls.deinit(self._c_object)
626
return gnutls.handshake(self._c_object)
628
def send(self, data):
632
data_len -= gnutls.record_send(self._c_object,
637
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
639
# Error handling functions
640
def _error_code(result):
641
"""A function to raise exceptions on errors, suitable
642
for the 'restype' attribute on ctypes functions"""
645
if result == gnutls.E_NO_CERTIFICATE_FOUND:
646
raise gnutls.CertificateSecurityError(code=result)
647
raise gnutls.Error(code=result)
649
def _retry_on_error(result, func, arguments):
650
"""A function to retry on some errors, suitable
651
for the 'errcheck' attribute on ctypes functions"""
653
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
654
return _error_code(result)
655
result = func(*arguments)
658
# Unless otherwise indicated, the function declarations below are
659
# all from the gnutls/gnutls.h C header file.
662
priority_set_direct = _library.gnutls_priority_set_direct
663
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
664
ctypes.POINTER(ctypes.c_char_p)]
665
priority_set_direct.restype = _error_code
667
init = _library.gnutls_init
668
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
669
init.restype = _error_code
671
set_default_priority = _library.gnutls_set_default_priority
672
set_default_priority.argtypes = [session_t]
673
set_default_priority.restype = _error_code
675
record_send = _library.gnutls_record_send
676
record_send.argtypes = [session_t, ctypes.c_void_p,
678
record_send.restype = ctypes.c_ssize_t
679
record_send.errcheck = _retry_on_error
681
certificate_allocate_credentials = (
682
_library.gnutls_certificate_allocate_credentials)
683
certificate_allocate_credentials.argtypes = [
684
ctypes.POINTER(certificate_credentials_t)]
685
certificate_allocate_credentials.restype = _error_code
687
certificate_free_credentials = (
688
_library.gnutls_certificate_free_credentials)
689
certificate_free_credentials.argtypes = [
690
certificate_credentials_t]
691
certificate_free_credentials.restype = None
693
handshake_set_private_extensions = (
694
_library.gnutls_handshake_set_private_extensions)
695
handshake_set_private_extensions.argtypes = [session_t,
697
handshake_set_private_extensions.restype = None
699
credentials_set = _library.gnutls_credentials_set
700
credentials_set.argtypes = [session_t, credentials_type_t,
702
credentials_set.restype = _error_code
704
strerror = _library.gnutls_strerror
705
strerror.argtypes = [ctypes.c_int]
706
strerror.restype = ctypes.c_char_p
708
certificate_type_get = _library.gnutls_certificate_type_get
709
certificate_type_get.argtypes = [session_t]
710
certificate_type_get.restype = _error_code
712
certificate_get_peers = _library.gnutls_certificate_get_peers
713
certificate_get_peers.argtypes = [session_t,
714
ctypes.POINTER(ctypes.c_uint)]
715
certificate_get_peers.restype = ctypes.POINTER(datum_t)
717
global_set_log_level = _library.gnutls_global_set_log_level
718
global_set_log_level.argtypes = [ctypes.c_int]
719
global_set_log_level.restype = None
721
global_set_log_function = _library.gnutls_global_set_log_function
722
global_set_log_function.argtypes = [log_func]
723
global_set_log_function.restype = None
725
deinit = _library.gnutls_deinit
726
deinit.argtypes = [session_t]
727
deinit.restype = None
729
handshake = _library.gnutls_handshake
730
handshake.argtypes = [session_t]
731
handshake.restype = _error_code
732
handshake.errcheck = _retry_on_error
734
transport_set_ptr = _library.gnutls_transport_set_ptr
735
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
736
transport_set_ptr.restype = None
738
bye = _library.gnutls_bye
739
bye.argtypes = [session_t, close_request_t]
740
bye.restype = _error_code
741
bye.errcheck = _retry_on_error
743
check_version = _library.gnutls_check_version
744
check_version.argtypes = [ctypes.c_char_p]
745
check_version.restype = ctypes.c_char_p
747
has_rawpk = bool(check_version(_tls_rawpk_version))
751
class pubkey_st(ctypes.Structure):
753
pubkey_t = ctypes.POINTER(pubkey_st)
755
x509_crt_fmt_t = ctypes.c_int
757
# All the function declarations below are from gnutls/abstract.h
758
pubkey_init = _library.gnutls_pubkey_init
759
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
760
pubkey_init.restype = _error_code
762
pubkey_import = _library.gnutls_pubkey_import
763
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
765
pubkey_import.restype = _error_code
767
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
768
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
769
ctypes.POINTER(ctypes.c_ubyte),
770
ctypes.POINTER(ctypes.c_size_t)]
771
pubkey_get_key_id.restype = _error_code
773
pubkey_deinit = _library.gnutls_pubkey_deinit
774
pubkey_deinit.argtypes = [pubkey_t]
775
pubkey_deinit.restype = None
777
# All the function declarations below are from gnutls/openpgp.h
779
openpgp_crt_init = _library.gnutls_openpgp_crt_init
780
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
781
openpgp_crt_init.restype = _error_code
783
openpgp_crt_import = _library.gnutls_openpgp_crt_import
784
openpgp_crt_import.argtypes = [openpgp_crt_t,
785
ctypes.POINTER(datum_t),
787
openpgp_crt_import.restype = _error_code
789
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
790
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
791
ctypes.POINTER(ctypes.c_uint)]
792
openpgp_crt_verify_self.restype = _error_code
794
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
795
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
796
openpgp_crt_deinit.restype = None
798
openpgp_crt_get_fingerprint = (
799
_library.gnutls_openpgp_crt_get_fingerprint)
800
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
804
openpgp_crt_get_fingerprint.restype = _error_code
806
if check_version("3.6.4"):
807
certificate_type_get2 = _library.gnutls_certificate_type_get2
808
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
809
certificate_type_get2.restype = _error_code
811
# Remove non-public functions
812
del _error_code, _retry_on_error
813
# Create the global "gnutls" object, simulating a module
817
def call_pipe(connection, # : multiprocessing.Connection
818
func, *args, **kwargs):
819
"""This function is meant to be called by multiprocessing.Process
821
This function runs func(*args, **kwargs), and writes the resulting
822
return value on the provided multiprocessing.Connection.
824
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))
828
285
class Client(object):
829
286
"""A representation of a client host served by this server.
832
approved: bool(); 'None' if not yet approved/disapproved
289
_approved: bool(); 'None' if not yet approved/disapproved
833
290
approval_delay: datetime.timedelta(); Time to wait for approval
834
291
approval_duration: datetime.timedelta(); Duration of one approval
835
292
checker: subprocess.Popen(); a running checker process used
836
293
to see if the client lives.
837
294
'None' if no process is running.
838
checker_callback_tag: a GLib event source tag, or None
295
checker_callback_tag: a gobject event source tag, or None
839
296
checker_command: string; External command which is run to check
840
297
if client lives. %() expansions are done at
841
298
runtime with vars(self) as dict, so that for
842
299
instance %(name)s can be used in the command.
843
checker_initiator_tag: a GLib event source tag, or None
300
checker_initiator_tag: a gobject event source tag, or None
844
301
created: datetime.datetime(); (UTC) object creation
845
302
client_structure: Object describing what attributes a client has
846
303
and is used for storing the client at exit
847
304
current_checker_command: string; current running checker_command
848
disable_initiator_tag: a GLib event source tag, or None
305
disable_initiator_tag: a gobject event source tag, or None
850
307
fingerprint: string (40 or 32 hexadecimal digits); used to
851
uniquely identify an OpenPGP client
852
key_id: string (64 hexadecimal digits); used to uniquely identify
853
a client using raw public keys
308
uniquely identify the client
854
309
host: string; available for use by the checker command
855
310
interval: datetime.timedelta(); How often to start a new checker
856
311
last_approval_request: datetime.datetime(); (UTC) or None
857
312
last_checked_ok: datetime.datetime(); (UTC) or None
858
313
last_checker_status: integer between 0 and 255 reflecting exit
859
status of last checker. -1 reflects crashed
860
checker, -2 means no checker completed yet.
861
last_checker_signal: The signal which killed the last checker, if
862
last_checker_status is -1
863
last_enabled: datetime.datetime(); (UTC) or None
314
status of last checker. -1 reflect crashed
316
last_enabled: datetime.datetime(); (UTC)
864
317
name: string; from the config file, used in log messages and
865
318
D-Bus identifiers
866
319
secret: bytestring; sent verbatim (over TLS) to client
867
320
timeout: datetime.timedelta(); How long from last_checked_ok
868
321
until this client is disabled
869
extended_timeout: extra long timeout when secret has been sent
322
extended_timeout: extra long timeout when password has been sent
870
323
runtime_expansions: Allowed attributes for runtime expansion.
871
324
expires: datetime.datetime(); time (UTC) when a client will be
872
325
disabled, or None
873
server_settings: The server_settings dict from main()
876
328
runtime_expansions = ("approval_delay", "approval_duration",
877
"created", "enabled", "expires", "key_id",
878
"fingerprint", "host", "interval",
879
"last_approval_request", "last_checked_ok",
329
"created", "enabled", "fingerprint",
330
"host", "interval", "last_checked_ok",
880
331
"last_enabled", "name", "timeout")
883
"extended_timeout": "PT15M",
885
"checker": "fping -q -- %%(host)s",
887
"approval_delay": "PT0S",
888
"approval_duration": "PT1S",
889
"approved_by_default": "True",
894
def config_parser(config):
895
"""Construct a new dict of client settings of this form:
896
{ client_name: {setting_name: value, ...}, ...}
897
with exceptions for any special settings as defined above.
898
NOTE: Must be a pure function. Must return the same result
899
value given the same arguments.
902
for client_name in config.sections():
903
section = dict(config.items(client_name))
904
client = settings[client_name] = {}
906
client["host"] = section["host"]
907
# Reformat values from string types to Python types
908
client["approved_by_default"] = config.getboolean(
909
client_name, "approved_by_default")
910
client["enabled"] = config.getboolean(client_name,
913
# Uppercase and remove spaces from key_id and fingerprint
914
# for later comparison purposes with return value from the
915
# key_id() and fingerprint() functions
916
client["key_id"] = (section.get("key_id", "").upper()
918
client["fingerprint"] = (section["fingerprint"].upper()
920
if "secret" in section:
921
client["secret"] = codecs.decode(section["secret"]
924
elif "secfile" in section:
925
with open(os.path.expanduser(os.path.expandvars
926
(section["secfile"])),
928
client["secret"] = secfile.read()
930
raise TypeError("No secret or secfile for section {}"
932
client["timeout"] = string_to_delta(section["timeout"])
933
client["extended_timeout"] = string_to_delta(
934
section["extended_timeout"])
935
client["interval"] = string_to_delta(section["interval"])
936
client["approval_delay"] = string_to_delta(
937
section["approval_delay"])
938
client["approval_duration"] = string_to_delta(
939
section["approval_duration"])
940
client["checker_command"] = section["checker"]
941
client["last_approval_request"] = None
942
client["last_checked_ok"] = None
943
client["last_checker_status"] = -2
947
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'
949
if server_settings is None:
951
self.server_settings = server_settings
952
# adding all client settings
953
for setting, value in settings.items():
954
setattr(self, setting, value)
957
if not hasattr(self, "last_enabled"):
958
self.last_enabled = datetime.datetime.utcnow()
959
if not hasattr(self, "expires"):
960
self.expires = (datetime.datetime.utcnow()
963
self.last_enabled = None
966
355
logger.debug("Creating client %r", self.name)
967
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()
968
361
logger.debug(" Fingerprint: %s", self.fingerprint)
969
self.created = settings.get("created",
970
datetime.datetime.utcnow())
972
# 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"])
973
383
self.checker = None
974
384
self.checker_initiator_tag = None
975
385
self.disable_initiator_tag = None
386
self.expires = datetime.datetime.utcnow() + self.timeout
976
387
self.checker_callback_tag = None
388
self.checker_command = config["checker"]
977
389
self.current_checker_command = None
390
self._approved = None
391
self.approved_by_default = config.get("approved_by_default",
979
393
self.approvals_pending = 0
980
self.changedstate = multiprocessing_manager.Condition(
981
multiprocessing_manager.Lock())
982
self.client_structure = [attr
983
for attr in self.__dict__.keys()
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()
984
403
if not attr.startswith("_")]
985
404
self.client_structure.append("client_structure")
987
for name, t in inspect.getmembers(
988
type(self), lambda obj: isinstance(obj, property)):
407
for name, t in inspect.getmembers(type(self),
989
411
if not name.startswith("_"):
990
412
self.client_structure.append(name)
992
414
# Send notice to process children that client state has changed
993
415
def send_changedstate(self):
994
416
with self.changedstate:
995
417
self.changedstate.notify_all()
997
419
def enable(self):
998
420
"""Start this client's checker and timeout hooks"""
999
421
if getattr(self, "enabled", False):
1000
422
# Already enabled
424
self.send_changedstate()
1002
425
self.expires = datetime.datetime.utcnow() + self.timeout
1003
426
self.enabled = True
1004
427
self.last_enabled = datetime.datetime.utcnow()
1005
428
self.init_checker()
1006
self.send_changedstate()
1008
430
def disable(self, quiet=True):
1009
431
"""Disable this client."""
1010
432
if not getattr(self, "enabled", False):
435
self.send_changedstate()
1013
437
logger.info("Disabling client %s", self.name)
1014
if getattr(self, "disable_initiator_tag", None) is not None:
1015
GLib.source_remove(self.disable_initiator_tag)
438
if getattr(self, "disable_initiator_tag", False):
439
gobject.source_remove(self.disable_initiator_tag)
1016
440
self.disable_initiator_tag = None
1017
441
self.expires = None
1018
if getattr(self, "checker_initiator_tag", None) is not None:
1019
GLib.source_remove(self.checker_initiator_tag)
442
if getattr(self, "checker_initiator_tag", False):
443
gobject.source_remove(self.checker_initiator_tag)
1020
444
self.checker_initiator_tag = None
1021
445
self.stop_checker()
1022
446
self.enabled = False
1024
self.send_changedstate()
1025
# Do not run this again if called by a GLib.timeout_add
447
# Do not run this again if called by a gobject.timeout_add
1028
450
def __del__(self):
1031
453
def init_checker(self):
1032
454
# Schedule a new checker to be started an 'interval' from now,
1033
455
# and every interval from then on.
1034
if self.checker_initiator_tag is not None:
1035
GLib.source_remove(self.checker_initiator_tag)
1036
self.checker_initiator_tag = GLib.timeout_add(
1037
int(self.interval.total_seconds() * 1000),
456
self.checker_initiator_tag = (gobject.timeout_add
457
(self.interval_milliseconds(),
1039
459
# Schedule a disable() when 'timeout' has passed
1040
if self.disable_initiator_tag is not None:
1041
GLib.source_remove(self.disable_initiator_tag)
1042
self.disable_initiator_tag = GLib.timeout_add(
1043
int(self.timeout.total_seconds() * 1000), self.disable)
460
self.disable_initiator_tag = (gobject.timeout_add
461
(self.timeout_milliseconds(),
1044
463
# Also start a new checker *right now*.
1045
464
self.start_checker()
1047
def checker_callback(self, source, condition, connection,
467
def checker_callback(self, pid, condition, command):
1049
468
"""The checker has completed, so take appropriate actions."""
1050
469
self.checker_callback_tag = None
1051
470
self.checker = None
1052
# Read return code from connection (see call_pipe)
1053
returncode = connection.recv()
1057
self.last_checker_status = returncode
1058
self.last_checker_signal = None
471
if os.WIFEXITED(condition):
472
self.last_checker_status = os.WEXITSTATUS(condition)
1059
473
if self.last_checker_status == 0:
1060
474
logger.info("Checker for %(name)s succeeded",
1062
476
self.checked_ok()
1064
logger.info("Checker for %(name)s failed", vars(self))
478
logger.info("Checker for %(name)s failed",
1066
481
self.last_checker_status = -1
1067
self.last_checker_signal = -returncode
1068
482
logger.warning("Checker for %(name)s crashed?",
1072
def checked_ok(self):
1073
"""Assert that the client has been seen, alive and well."""
1074
self.last_checked_ok = datetime.datetime.utcnow()
1075
self.last_checker_status = 0
1076
self.last_checker_signal = None
1079
def bump_timeout(self, timeout=None):
1080
"""Bump up the timeout for this client."""
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,
1081
491
if timeout is None:
1082
492
timeout = self.timeout
493
self.last_checked_ok = datetime.datetime.utcnow()
1083
494
if self.disable_initiator_tag is not None:
1084
GLib.source_remove(self.disable_initiator_tag)
1085
self.disable_initiator_tag = None
495
gobject.source_remove(self.disable_initiator_tag)
1086
496
if getattr(self, "enabled", False):
1087
self.disable_initiator_tag = GLib.timeout_add(
1088
int(timeout.total_seconds() * 1000), self.disable)
497
self.disable_initiator_tag = (gobject.timeout_add
498
(_timedelta_to_milliseconds
499
(timeout), self.disable))
1089
500
self.expires = datetime.datetime.utcnow() + timeout
1091
502
def need_approval(self):
1092
503
self.last_approval_request = datetime.datetime.utcnow()
1094
505
def start_checker(self):
1095
506
"""Start a new checker subprocess if one is not running.
1097
508
If a checker already exists, leave it running and do
1099
510
# The reason for not killing a running checker is that if we
1100
# did that, and if a checker (for some reason) started running
1101
# slowly and taking more than 'interval' time, then the client
1102
# would inevitably timeout, since no checker would get a
1103
# chance to run to completion. If we instead leave running
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
1104
515
# checkers alone, the checker would have to take more time
1105
516
# than 'timeout' for the client to be disabled, which is as it
1108
if self.checker is not None and not self.checker.is_alive():
1109
logger.warning("Checker was not alive; joining")
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)
1112
532
# Start a new checker if needed
1113
533
if self.checker is None:
1114
# Escape attributes for the shell
1116
attr: re.escape(str(getattr(self, attr)))
1117
for attr in self.runtime_expansions}
1119
command = self.checker_command % escaped_attrs
1120
except TypeError as error:
1121
logger.error('Could not format string "%s"',
1122
self.checker_command,
1124
return True # Try again later
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
1125
553
self.current_checker_command = command
1126
logger.info("Starting checker %r for %s", command,
1128
# We don't need to redirect stdout and stderr, since
1129
# in normal mode, that is already done by daemon(),
1130
# and in debug mode we don't want to. (Stdin is
1131
# always replaced by /dev/null.)
1132
# The exception is when not debugging but nevertheless
1133
# running in the foreground; use the previously
1135
popen_args = {"close_fds": True,
1138
if (not self.server_settings["debug"]
1139
and self.server_settings["foreground"]):
1140
popen_args.update({"stdout": wnull,
1142
pipe = multiprocessing.Pipe(duplex=False)
1143
self.checker = multiprocessing.Process(
1145
args=(pipe[1], subprocess.call, command),
1147
self.checker.start()
1148
self.checker_callback_tag = GLib.io_add_watch(
1149
pipe[0].fileno(), GLib.IO_IN,
1150
self.checker_callback, pipe[0], command)
1151
# Re-run this periodically if run by GLib.timeout_add
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
1154
580
def stop_checker(self):
1155
581
"""Force the checker process, if any, to stop."""
1156
582
if self.checker_callback_tag:
1157
GLib.source_remove(self.checker_callback_tag)
583
gobject.source_remove(self.checker_callback_tag)
1158
584
self.checker_callback_tag = None
1159
585
if getattr(self, "checker", None) is None:
1161
587
logger.debug("Stopping checker for %(name)s", vars(self))
1162
self.checker.terminate()
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
1163
596
self.checker = None
1166
def dbus_service_property(dbus_interface,
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
651
"""Decorators for marking methods of a DBusObjectWithProperties to
1171
652
become properties on the D-Bus.
1173
654
The decorated method will be called with no arguments by "Get"
1174
655
and with one argument by "Set".
1176
657
The parameters, where they are supported, are the same as
1177
658
dbus.service.method, except there is only "signature", since the
1178
659
type from Get() and the type sent to Set() is the same.
1511
829
except (AttributeError, xml.dom.DOMException,
1512
830
xml.parsers.expat.ExpatError) as error:
1513
831
logger.error("Failed to override Introspection method",
1519
dbus.OBJECT_MANAGER_IFACE
1520
except AttributeError:
1521
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1524
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1525
"""A D-Bus object with an ObjectManager.
1527
Classes inheriting from this exposes the standard
1528
GetManagedObjects call and the InterfacesAdded and
1529
InterfacesRemoved signals on the standard
1530
"org.freedesktop.DBus.ObjectManager" interface.
1532
Note: No signals are sent automatically; they must be sent
1535
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1536
out_signature="a{oa{sa{sv}}}")
1537
def GetManagedObjects(self):
1538
"""This function must be overridden"""
1539
raise NotImplementedError()
1541
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1542
signature="oa{sa{sv}}")
1543
def InterfacesAdded(self, object_path, interfaces_and_properties):
1546
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1547
def InterfacesRemoved(self, object_path, interfaces):
1550
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1552
path_keyword='object_path',
1553
connection_keyword='connection')
1554
def Introspect(self, object_path, connection):
1555
"""Overloading of standard D-Bus method.
1557
Override return argument name of GetManagedObjects to be
1558
"objpath_interfaces_and_properties"
1560
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1564
document = xml.dom.minidom.parseString(xmlstring)
1566
for if_tag in document.getElementsByTagName("interface"):
1567
# Fix argument name for the GetManagedObjects method
1568
if (if_tag.getAttribute("name")
1569
== dbus.OBJECT_MANAGER_IFACE):
1570
for cn in if_tag.getElementsByTagName("method"):
1571
if (cn.getAttribute("name")
1572
== "GetManagedObjects"):
1573
for arg in cn.getElementsByTagName("arg"):
1574
if (arg.getAttribute("direction")
1578
"objpath_interfaces"
1580
xmlstring = document.toxml("utf-8")
1582
except (AttributeError, xml.dom.DOMException,
1583
xml.parsers.expat.ExpatError) as error:
1584
logger.error("Failed to override Introspection method",
1589
def datetime_to_dbus(dt, variant_level=0):
836
def datetime_to_dbus (dt, variant_level=0):
1590
837
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1592
return dbus.String("", variant_level=variant_level)
1593
return dbus.String(dt.isoformat(), variant_level=variant_level)
1596
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1597
"""A class decorator; applied to a subclass of
1598
dbus.service.Object, it will add alternate D-Bus attributes with
1599
interface names according to the "alt_interface_names" mapping.
1602
@alternate_dbus_interfaces({"org.example.Interface":
1603
"net.example.AlternateInterface"})
1604
class SampleDBusObject(dbus.service.Object):
1605
@dbus.service.method("org.example.Interface")
1606
def SampleDBusMethod():
1609
The above "SampleDBusMethod" on "SampleDBusObject" will be
1610
reachable via two interfaces: "org.example.Interface" and
1611
"net.example.AlternateInterface", the latter of which will have
1612
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1613
"true", unless "deprecate" is passed with a False value.
1615
This works for methods and signals, and also for D-Bus properties
1616
(from DBusObjectWithProperties) and interfaces (from the
1617
dbus_interface_annotations decorator).
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.
1621
for orig_interface_name, alt_interface_name in (
1622
alt_interface_names.items()):
1624
interface_names = set()
1625
# Go though all attributes of the class
1626
for attrname, attribute in inspect.getmembers(cls):
848
def __new__(mcs, name, bases, attr):
849
# Go through all the base classes which could have D-Bus
850
# methods, signals, or properties in them
851
for base in (b for b in bases
852
if issubclass(b, dbus.service.Object)):
853
# Go though all attributes of the base class
854
for attrname, attribute in inspect.getmembers(base):
1627
855
# Ignore non-D-Bus attributes, and D-Bus attributes
1628
856
# with the wrong interface name
1629
857
if (not hasattr(attribute, "_dbus_interface")
1630
or not attribute._dbus_interface.startswith(
1631
orig_interface_name)):
858
or not attribute._dbus_interface
859
.startswith("se.recompile.Mandos")):
1633
861
# Create an alternate D-Bus interface name based on
1634
862
# the current name
1635
alt_interface = attribute._dbus_interface.replace(
1636
orig_interface_name, alt_interface_name)
1637
interface_names.add(alt_interface)
863
alt_interface = (attribute._dbus_interface
864
.replace("se.recompile.Mandos",
865
"se.bsnet.fukt.Mandos"))
1638
866
# Is this a D-Bus signal?
1639
867
if getattr(attribute, "_dbus_is_signal", False):
1640
# Extract the original non-method undecorated
1641
# function by black magic
1642
if sys.version_info.major == 2:
1643
nonmethod_func = (dict(
868
# Extract the original non-method function by
870
nonmethod_func = (dict(
1644
871
zip(attribute.func_code.co_freevars,
1645
attribute.__closure__))
1646
["func"].cell_contents)
1648
nonmethod_func = (dict(
1649
zip(attribute.__code__.co_freevars,
1650
attribute.__closure__))
1651
["func"].cell_contents)
872
attribute.__closure__))["func"]
1652
874
# Create a new, but exactly alike, function
1653
875
# object, and decorate it to be a new D-Bus signal
1654
876
# with the alternate D-Bus interface name
1655
new_function = copy_function(nonmethod_func)
1656
new_function = (dbus.service.signal(
1658
attribute._dbus_signature)(new_function))
1659
# Copy annotations, if any
1661
new_function._dbus_annotations = dict(
1662
attribute._dbus_annotations)
1663
except AttributeError:
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)))
1666
886
# Define a creator of a function to call both the
1667
# original and alternate functions, so both the
1668
# original and alternate signals gets sent when
1669
# the function is called
887
# old and new functions, so both the old and new
888
# signals gets sent when the function is called
1670
889
def fixscope(func1, func2):
1671
890
"""This function is a scope container to pass
1672
891
func1 and func2 to the "call_both" function
1673
892
outside of its arguments"""
1675
@functools.wraps(func2)
1676
893
def call_both(*args, **kwargs):
1677
894
"""This function will emit two D-Bus
1678
895
signals by calling func1 and func2"""
1679
896
func1(*args, **kwargs)
1680
897
func2(*args, **kwargs)
1681
# Make wrapper function look like a D-Bus
1683
for name, attr in inspect.getmembers(func2):
1684
if name.startswith("_dbus_"):
1685
setattr(call_both, name, attr)
1687
898
return call_both
1688
899
# Create the "call_both" function and add it to
1690
attr[attrname] = fixscope(attribute, new_function)
901
attr[attrname] = fixscope(attribute,
1691
903
# Is this a D-Bus method?
1692
904
elif getattr(attribute, "_dbus_is_method", False):
1693
905
# Create a new, but exactly alike, function
1694
906
# object. Decorate it to be a new D-Bus method
1695
907
# with the alternate D-Bus interface name. Add it
1698
dbus.service.method(
1700
attribute._dbus_in_signature,
1701
attribute._dbus_out_signature)
1702
(copy_function(attribute)))
1703
# Copy annotations, if any
1705
attr[attrname]._dbus_annotations = dict(
1706
attribute._dbus_annotations)
1707
except AttributeError:
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)))
1709
919
# Is this a D-Bus property?
1710
920
elif getattr(attribute, "_dbus_is_property", False):
1711
921
# Create a new, but exactly alike, function
1712
922
# object, and decorate it to be a new D-Bus
1713
923
# property with the alternate D-Bus interface
1714
924
# name. Add it to the class.
1715
attr[attrname] = (dbus_service_property(
1716
alt_interface, attribute._dbus_signature,
1717
attribute._dbus_access,
1718
attribute._dbus_get_args_options
1720
(copy_function(attribute)))
1721
# Copy annotations, if any
1723
attr[attrname]._dbus_annotations = dict(
1724
attribute._dbus_annotations)
1725
except AttributeError:
1727
# Is this a D-Bus interface?
1728
elif getattr(attribute, "_dbus_is_interface", False):
1729
# Create a new, but exactly alike, function
1730
# object. Decorate it to be a new D-Bus interface
1731
# with the alternate D-Bus interface name. Add it
1734
dbus_interface_annotations(alt_interface)
1735
(copy_function(attribute)))
1737
# Deprecate all alternate interfaces
1738
iname = "_AlternateDBusNames_interface_annotation{}"
1739
for interface_name in interface_names:
1741
@dbus_interface_annotations(interface_name)
1743
return {"org.freedesktop.DBus.Deprecated":
1745
# Find an unused name
1746
for aname in (iname.format(i)
1747
for i in itertools.count()):
1748
if aname not in attr:
1752
# Replace the class with a new subclass of it with
1753
# methods, signals, etc. as created above.
1754
if sys.version_info.major == 2:
1755
cls = type(b"{}Alternate".format(cls.__name__),
1758
cls = type("{}Alternate".format(cls.__name__),
1765
@alternate_dbus_interfaces({"se.recompile.Mandos":
1766
"se.bsnet.fukt.Mandos"})
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)
1767
940
class ClientDBus(Client, DBusObjectWithProperties):
1768
941
"""A Client class using D-Bus
1771
944
dbus_object_path: dbus.ObjectPath
1772
945
bus: dbus.SystemBus()
1775
948
runtime_expansions = (Client.runtime_expansions
1776
+ ("dbus_object_path", ))
1778
_interface = "se.recompile.Mandos.Client"
949
+ ("dbus_object_path",))
1780
951
# dbus.service.Object doesn't use super(), so we can't either.
1782
def __init__(self, bus=None, *args, **kwargs):
953
def __init__(self, bus = None, *args, **kwargs):
955
self._approvals_pending = 0
1784
956
Client.__init__(self, *args, **kwargs)
959
def add_to_dbus(self):
1785
960
# Only now, when this client is initialized, can it show up on
1787
client_object_name = str(self.name).translate(
962
client_object_name = unicode(self.name).translate(
1788
963
{ord("."): ord("_"),
1789
964
ord("-"): ord("_")})
1790
self.dbus_object_path = dbus.ObjectPath(
1791
"/clients/" + client_object_name)
965
self.dbus_object_path = (dbus.ObjectPath
966
("/clients/" + client_object_name))
1792
967
DBusObjectWithProperties.__init__(self, self.bus,
1793
968
self.dbus_object_path)
1795
def notifychangeproperty(transform_func, dbus_name,
1796
type_func=lambda x: x,
1798
invalidate_only=False,
1799
_interface=_interface):
970
def notifychangeproperty(transform_func,
971
dbus_name, type_func=lambda x: x,
1800
973
""" Modify a variable so that it's a property which announces
1801
974
its changes to DBus.
2196
1326
self.start_checker()
2198
1328
self.stop_checker()
2200
1330
# ObjectPath - property
2202
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2203
"org.freedesktop.DBus.Deprecated": "true"})
2204
1331
@dbus_service_property(_interface, signature="o", access="read")
2205
1332
def ObjectPath_dbus_property(self):
2206
return self.dbus_object_path # is already a dbus.ObjectPath
1333
return self.dbus_object_path # is already a dbus.ObjectPath
2208
1335
# Secret = property
2210
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2212
@dbus_service_property(_interface,
1336
@dbus_service_property(_interface, signature="ay",
1337
access="write", byte_arrays=True)
2216
1338
def Secret_dbus_property(self, value):
2217
self.secret = bytes(value)
1339
self.secret = str(value)
2222
1344
class ProxyClient(object):
2223
def __init__(self, child_pipe, key_id, fpr, address):
1345
def __init__(self, child_pipe, fpr, address):
2224
1346
self._pipe = child_pipe
2225
self._pipe.send(('init', key_id, fpr, address))
1347
self._pipe.send(('init', fpr, address))
2226
1348
if not self._pipe.recv():
2227
raise KeyError(key_id or fpr)
2229
1351
def __getattribute__(self, name):
1352
if(name == '_pipe'):
2231
1353
return super(ProxyClient, self).__getattribute__(name)
2232
1354
self._pipe.send(('getattr', name))
2233
1355
data = self._pipe.recv()
2234
1356
if data[0] == 'data':
2236
1358
if data[0] == 'function':
2238
1359
def func(*args, **kwargs):
2239
1360
self._pipe.send(('funcall', name, args, kwargs))
2240
1361
return self._pipe.recv()[1]
2244
1364
def __setattr__(self, name, value):
1365
if(name == '_pipe'):
2246
1366
return super(ProxyClient, self).__setattr__(name, value)
2247
1367
self._pipe.send(('setattr', name, value))
1369
class ClientDBusTransitional(ClientDBus):
1370
__metaclass__ = AlternateDBusNamesMetaclass
2250
1372
class ClientHandler(socketserver.BaseRequestHandler, object):
2251
1373
"""A class to handle client connections.
2253
1375
Instantiated once for each connection to handle it.
2254
1376
Note: This will run in its own forked process."""
2256
1378
def handle(self):
2257
1379
with contextlib.closing(self.server.child_pipe) as child_pipe:
2258
1380
logger.info("TCP connection from: %s",
2259
str(self.client_address))
1381
unicode(self.client_address))
2260
1382
logger.debug("Pipe FD: %d",
2261
1383
self.server.child_pipe.fileno())
2263
session = gnutls.ClientSession(self.request)
2265
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2266
# "+AES-256-CBC", "+SHA1",
2267
# "+COMP-NULL", "+CTYPE-OPENPGP",
1385
session = (gnutls.connection
1386
.ClientSession(self.request,
1388
.X509Credentials()))
1390
# Note: gnutls.connection.X509Credentials is really a
1391
# generic GnuTLS certificate credentials object so long as
1392
# no X.509 keys are added to it. Therefore, we can use it
1393
# here despite using OpenPGP certificates.
1395
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1396
# "+AES-256-CBC", "+SHA1",
1397
# "+COMP-NULL", "+CTYPE-OPENPGP",
2269
1399
# Use a fallback default, since this MUST be set.
2270
1400
priority = self.server.gnutls_priority
2271
1401
if priority is None:
2272
1402
priority = "NORMAL"
2273
gnutls.priority_set_direct(session._c_object,
2274
priority.encode("utf-8"),
1403
(gnutls.library.functions
1404
.gnutls_priority_set_direct(session._c_object,
2277
1407
# Start communication using the Mandos protocol
2278
1408
# Get protocol number
2279
1409
line = self.request.makefile().readline()
2280
1410
logger.debug("Protocol version: %r", line)
2282
1412
if int(line.strip().split()[0]) > 1:
2283
raise RuntimeError(line)
2284
1414
except (ValueError, IndexError, RuntimeError) as error:
2285
1415
logger.error("Unknown protocol version: %s", error)
2288
1418
# Start GnuTLS connection
2290
1420
session.handshake()
2291
except gnutls.Error as error:
1421
except gnutls.errors.GNUTLSError as error:
2292
1422
logger.warning("Handshake failed: %s", error)
2293
1423
# Do not run session.bye() here: the session is not
2294
1424
# established. Just abandon the request.
2296
1426
logger.debug("Handshake succeeded")
2298
1428
approval_required = False
2300
if gnutls.has_rawpk:
2303
key_id = self.key_id(
2304
self.peer_certificate(session))
2305
except (TypeError, gnutls.Error) as error:
2306
logger.warning("Bad certificate: %s", error)
2308
logger.debug("Key ID: %s", key_id)
2313
fpr = self.fingerprint(
2314
self.peer_certificate(session))
2315
except (TypeError, gnutls.Error) as error:
2316
logger.warning("Bad certificate: %s", error)
2318
logger.debug("Fingerprint: %s", fpr)
2321
client = ProxyClient(child_pipe, key_id, fpr,
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,
2322
1441
self.client_address)
2323
1442
except KeyError:
2326
1445
if client.approval_delay:
2327
1446
delay = client.approval_delay
2328
1447
client.approvals_pending += 1
2329
1448
approval_required = True
2332
1451
if not client.enabled:
2333
1452
logger.info("Client %s is disabled",
2335
1454
if self.server.use_dbus:
2336
1455
# Emit D-Bus signal
2337
1456
client.Rejected("Disabled")
2340
if client.approved or not client.approval_delay:
2341
# We are approved or approval is disabled
1459
if client._approved or not client.approval_delay:
1460
#We are approved or approval is disabled
2343
elif client.approved is None:
1462
elif client._approved is None:
2344
1463
logger.info("Client %s needs approval",
2346
1465
if self.server.use_dbus:
2347
1466
# Emit D-Bus signal
2348
1467
client.NeedApproval(
2349
client.approval_delay.total_seconds()
2350
* 1000, client.approved_by_default)
1468
client.approval_delay_milliseconds(),
1469
client.approved_by_default)
2352
1471
logger.warning("Client %s was not approved",
2377
1498
delay -= time2 - time
2380
session.send(client.secret)
2381
except gnutls.Error as error:
2382
logger.warning("gnutls send failed",
1501
while sent_size < len(client.secret):
1503
sent = session.send(client.secret[sent_size:])
1504
except gnutls.errors.GNUTLSError as error:
1505
logger.warning("gnutls send failed")
1507
logger.debug("Sent: %d, remaining: %d",
1508
sent, len(client.secret)
1509
- (sent_size + sent))
2386
1512
logger.info("Sending secret to %s", client.name)
2387
1513
# bump the timeout using extended_timeout
2388
client.bump_timeout(client.extended_timeout)
1514
client.checked_ok(client.extended_timeout)
2389
1515
if self.server.use_dbus:
2390
1516
# Emit D-Bus signal
2391
1517
client.GotSecret()
2394
1520
if approval_required:
2395
1521
client.approvals_pending -= 1
2398
except gnutls.Error as error:
2399
logger.warning("GnuTLS bye failed",
1524
except gnutls.errors.GNUTLSError as error:
1525
logger.warning("GnuTLS bye failed")
2403
1528
def peer_certificate(session):
2404
"Return the peer's certificate as a bytestring"
2406
cert_type = gnutls.certificate_type_get2(session._c_object,
2408
except AttributeError:
2409
cert_type = gnutls.certificate_type_get(session._c_object)
2410
if gnutls.has_rawpk:
2411
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2413
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2414
# If not a valid certificate type...
2415
if cert_type not in valid_cert_types:
2416
logger.info("Cert type %r not in %r", cert_type,
2418
# ...return invalid data
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
2420
1536
list_size = ctypes.c_uint(1)
2421
cert_list = (gnutls.certificate_get_peers
1537
cert_list = (gnutls.library.functions
1538
.gnutls_certificate_get_peers
2422
1539
(session._c_object, ctypes.byref(list_size)))
2423
1540
if not bool(cert_list) and list_size.value != 0:
2424
raise gnutls.Error("error getting peer certificate")
1541
raise gnutls.errors.GNUTLSError("error getting peer"
2425
1543
if list_size.value == 0:
2427
1545
cert = cert_list[0]
2428
1546
return ctypes.string_at(cert.data, cert.size)
2431
def key_id(certificate):
2432
"Convert a certificate bytestring to a hexdigit key ID"
2433
# New GnuTLS "datum" with the public key
2434
datum = gnutls.datum_t(
2435
ctypes.cast(ctypes.c_char_p(certificate),
2436
ctypes.POINTER(ctypes.c_ubyte)),
2437
ctypes.c_uint(len(certificate)))
2438
# XXX all these need to be created in the gnutls "module"
2439
# New empty GnuTLS certificate
2440
pubkey = gnutls.pubkey_t()
2441
gnutls.pubkey_init(ctypes.byref(pubkey))
2442
# Import the raw public key into the certificate
2443
gnutls.pubkey_import(pubkey,
2444
ctypes.byref(datum),
2445
gnutls.X509_FMT_DER)
2446
# New buffer for the key ID
2447
buf = ctypes.create_string_buffer(32)
2448
buf_len = ctypes.c_size_t(len(buf))
2449
# Get the key ID from the raw public key into the buffer
2450
gnutls.pubkey_get_key_id(pubkey,
2451
gnutls.KEYID_USE_SHA256,
2452
ctypes.cast(ctypes.byref(buf),
2453
ctypes.POINTER(ctypes.c_ubyte)),
2454
ctypes.byref(buf_len))
2455
# Deinit the certificate
2456
gnutls.pubkey_deinit(pubkey)
2458
# Convert the buffer to a Python bytestring
2459
key_id = ctypes.string_at(buf, buf_len.value)
2460
# Convert the bytestring to hexadecimal notation
2461
hex_key_id = binascii.hexlify(key_id).upper()
2465
1549
def fingerprint(openpgp):
2466
1550
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2467
1551
# New GnuTLS "datum" with the OpenPGP public key
2468
datum = gnutls.datum_t(
2469
ctypes.cast(ctypes.c_char_p(openpgp),
2470
ctypes.POINTER(ctypes.c_ubyte)),
2471
ctypes.c_uint(len(openpgp)))
1552
datum = (gnutls.library.types
1553
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1556
ctypes.c_uint(len(openpgp))))
2472
1557
# New empty GnuTLS certificate
2473
crt = gnutls.openpgp_crt_t()
2474
gnutls.openpgp_crt_init(ctypes.byref(crt))
1558
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1559
(gnutls.library.functions
1560
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2475
1561
# Import the OpenPGP public key into the certificate
2476
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2477
gnutls.OPENPGP_FMT_RAW)
1562
(gnutls.library.functions
1563
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1564
gnutls.library.constants
1565
.GNUTLS_OPENPGP_FMT_RAW))
2478
1566
# Verify the self signature in the key
2479
1567
crtverify = ctypes.c_uint()
2480
gnutls.openpgp_crt_verify_self(crt, 0,
2481
ctypes.byref(crtverify))
1568
(gnutls.library.functions
1569
.gnutls_openpgp_crt_verify_self(crt, 0,
1570
ctypes.byref(crtverify)))
2482
1571
if crtverify.value != 0:
2483
gnutls.openpgp_crt_deinit(crt)
2484
raise gnutls.CertificateSecurityError(code
1572
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1573
raise (gnutls.errors.CertificateSecurityError
2486
1575
# New buffer for the fingerprint
2487
1576
buf = ctypes.create_string_buffer(20)
2488
1577
buf_len = ctypes.c_size_t()
2489
1578
# Get the fingerprint from the certificate into the buffer
2490
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2491
ctypes.byref(buf_len))
1579
(gnutls.library.functions
1580
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1581
ctypes.byref(buf_len)))
2492
1582
# Deinit the certificate
2493
gnutls.openpgp_crt_deinit(crt)
1583
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2494
1584
# Convert the buffer to a Python bytestring
2495
1585
fpr = ctypes.string_at(buf, buf_len.value)
2496
1586
# Convert the bytestring to hexadecimal notation
2497
hex_fpr = binascii.hexlify(fpr).upper()
1587
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2501
1591
class MultiprocessingMixIn(object):
2502
1592
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2504
1593
def sub_process_main(self, request, address):
2506
1595
self.finish_request(request, address)
2508
1597
self.handle_error(request, address)
2509
1598
self.close_request(request)
2511
1600
def process_request(self, request, address):
2512
1601
"""Start a new process to process the request."""
2513
proc = multiprocessing.Process(target=self.sub_process_main,
2514
args=(request, address))
1602
proc = multiprocessing.Process(target = self.sub_process_main,
2519
1609
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2520
1610
""" adds a pipe to the MixIn """
2522
1611
def process_request(self, request, client_address):
2523
1612
"""Overrides and wraps the original process_request().
2525
1614
This function creates a new pipe in self.pipe
2527
1616
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2529
1618
proc = MultiprocessingMixIn.process_request(self, request,
2530
1619
client_address)
2531
1620
self.child_pipe.close()
2532
1621
self.add_pipe(parent_pipe, proc)
2534
1623
def add_pipe(self, parent_pipe, proc):
2535
1624
"""Dummy function; override as necessary"""
2536
raise NotImplementedError()
1625
raise NotImplementedError
2539
1628
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2540
1629
socketserver.TCPServer, object):
2541
1630
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2544
1633
enabled: Boolean; whether this server is activated yet
2545
1634
interface: None or a network interface name (string)
2546
1635
use_ipv6: Boolean; to use IPv6 or not
2549
1637
def __init__(self, server_address, RequestHandlerClass,
2553
"""If socketfd is set, use that file descriptor instead of
2554
creating a new one with socket.socket().
1638
interface=None, use_ipv6=True):
2556
1639
self.interface = interface
2558
1641
self.address_family = socket.AF_INET6
2559
if socketfd is not None:
2560
# Save the file descriptor
2561
self.socketfd = socketfd
2562
# Save the original socket.socket() function
2563
self.socket_socket = socket.socket
2565
# To implement --socket, we monkey patch socket.socket.
2567
# (When socketserver.TCPServer is a new-style class, we
2568
# could make self.socket into a property instead of monkey
2569
# patching socket.socket.)
2571
# Create a one-time-only replacement for socket.socket()
2572
@functools.wraps(socket.socket)
2573
def socket_wrapper(*args, **kwargs):
2574
# Restore original function so subsequent calls are
2576
socket.socket = self.socket_socket
2577
del self.socket_socket
2578
# This time only, return a new socket object from the
2579
# saved file descriptor.
2580
return socket.fromfd(self.socketfd, *args, **kwargs)
2581
# Replace socket.socket() function with wrapper
2582
socket.socket = socket_wrapper
2583
# The socketserver.TCPServer.__init__ will call
2584
# socket.socket(), which might be our replacement,
2585
# socket_wrapper(), if socketfd was set.
2586
1642
socketserver.TCPServer.__init__(self, server_address,
2587
1643
RequestHandlerClass)
2589
1644
def server_bind(self):
2590
1645
"""This overrides the normal server_bind() function
2591
1646
to bind to an interface if one was specified, and also NOT to
2592
1647
bind to an address or port if they were not specified."""
2593
global SO_BINDTODEVICE
2594
1648
if self.interface is not None:
2595
1649
if SO_BINDTODEVICE is None:
2596
# Fall back to a hard-coded value which seems to be
2598
logger.warning("SO_BINDTODEVICE not found, trying 25")
2599
SO_BINDTODEVICE = 25
2601
self.socket.setsockopt(
2602
socket.SOL_SOCKET, SO_BINDTODEVICE,
2603
(self.interface + "\0").encode("utf-8"))
2604
except socket.error as error:
2605
if error.errno == errno.EPERM:
2606
logger.error("No permission to bind to"
2607
" interface %s", self.interface)
2608
elif error.errno == errno.ENOPROTOOPT:
2609
logger.error("SO_BINDTODEVICE not available;"
2610
" cannot bind to interface %s",
2612
elif error.errno == errno.ENODEV:
2613
logger.error("Interface %s does not exist,"
2614
" cannot bind", self.interface)
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",
2617
1670
# Only bind(2) the socket if we really need to.
2618
1671
if self.server_address[0] or self.server_address[1]:
2619
1672
if not self.server_address[0]:
2620
1673
if self.address_family == socket.AF_INET6:
2621
any_address = "::" # in6addr_any
1674
any_address = "::" # in6addr_any
2623
any_address = "0.0.0.0" # INADDR_ANY
1676
any_address = socket.INADDR_ANY
2624
1677
self.server_address = (any_address,
2625
1678
self.server_address[1])
2626
1679
elif not self.server_address[1]:
2627
self.server_address = (self.server_address[0], 0)
1680
self.server_address = (self.server_address[0],
2628
1682
# if self.interface:
2629
1683
# self.server_address = (self.server_address[0],
2957
1929
parser.add_argument("--no-dbus", action="store_false",
2958
1930
dest="use_dbus", help="Do not provide D-Bus"
2959
" system bus interface", default=None)
1931
" system bus interface")
2960
1932
parser.add_argument("--no-ipv6", action="store_false",
2961
dest="use_ipv6", help="Do not use IPv6",
1933
dest="use_ipv6", help="Do not use IPv6")
2963
1934
parser.add_argument("--no-restore", action="store_false",
2964
dest="restore", help="Do not restore stored"
2965
" state", default=None)
2966
parser.add_argument("--socket", type=int,
2967
help="Specify a file descriptor to a network"
2968
" socket to use instead of creating one")
2969
parser.add_argument("--statedir", metavar="DIR",
2970
help="Directory to save/restore state in")
2971
parser.add_argument("--foreground", action="store_true",
2972
help="Run in foreground", default=None)
2973
parser.add_argument("--no-zeroconf", action="store_false",
2974
dest="zeroconf", help="Do not use Zeroconf",
1936
help="Do not restore stored state",
2977
1939
options = parser.parse_args()
2979
1941
if options.check:
2981
fail_count, test_count = doctest.testmod()
2982
sys.exit(os.EX_OK if fail_count == 0 else 1)
2984
1946
# Default values for config file for server-global settings
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",
1947
server_defaults = { "interface": "",
1952
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1953
"servicename": "Mandos",
3008
1959
# Parse config file for server-global settings
3009
1960
server_config = configparser.SafeConfigParser(server_defaults)
3010
1961
del server_defaults
3011
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1962
server_config.read(os.path.join(options.configdir,
3012
1964
# Convert the SafeConfigParser object to a dict
3013
1965
server_settings = server_config.defaults()
3014
1966
# Use the appropriate methods on the non-string config options
3015
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3016
"foreground", "zeroconf"):
1967
for option in ("debug", "use_dbus", "use_ipv6"):
3017
1968
server_settings[option] = server_config.getboolean("DEFAULT",
3019
1970
if server_settings["port"]:
3020
1971
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
3031
1973
del server_config
3033
1975
# Override the settings from the config file with command line
3034
1976
# options, if set.
3035
1977
for option in ("interface", "address", "port", "debug",
3036
"priority", "servicename", "configdir", "use_dbus",
3037
"use_ipv6", "debuglevel", "restore", "statedir",
3038
"socket", "foreground", "zeroconf"):
1978
"priority", "servicename", "configdir",
1979
"use_dbus", "use_ipv6", "debuglevel", "restore"):
3039
1980
value = getattr(options, option)
3040
1981
if value is not None:
3041
1982
server_settings[option] = value
3043
1984
# Force all strings to be unicode
3044
1985
for option in server_settings.keys():
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
1986
if type(server_settings[option]) is str:
1987
server_settings[option] = unicode(server_settings[option])
3055
1988
# Now we have our good server settings in "server_settings"
3057
1990
##################################################################
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")
3064
1992
# For convenience
3065
1993
debug = server_settings["debug"]
3066
1994
debuglevel = server_settings["debuglevel"]
3067
1995
use_dbus = server_settings["use_dbus"]
3068
1996
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)
3083
1998
if server_settings["servicename"] != "Mandos":
3084
syslogger.setFormatter(
3085
logging.Formatter('Mandos ({}) [%(process)d]:'
3086
' %(levelname)s: %(message)s'.format(
3087
server_settings["servicename"])))
1999
syslogger.setFormatter(logging.Formatter
2000
('Mandos (%s) [%%(process)d]:'
2001
' %%(levelname)s: %%(message)s'
2002
% server_settings["servicename"]))
3089
2004
# Parse config file with clients
3090
client_config = configparser.SafeConfigParser(Client
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)
3092
2014
client_config.read(os.path.join(server_settings["configdir"],
3093
2015
"clients.conf"))
3095
2017
global mandos_dbus_service
3096
2018
mandos_dbus_service = None
3099
if server_settings["socket"] != "":
3100
socketfd = server_settings["socket"]
3101
tcp_server = MandosServer(
3102
(server_settings["address"], server_settings["port"]),
3104
interface=(server_settings["interface"] or None),
3106
gnutls_priority=server_settings["priority"],
3110
pidfilename = "/run/mandos.pid"
3111
if not os.path.isdir("/run/."):
3112
pidfilename = "/var/run/mandos.pid"
3115
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3116
except IOError as e:
3117
logger.error("Could not open file %r", pidfilename,
3120
for name, group in (("_mandos", "_mandos"),
3121
("mandos", "mandos"),
3122
("nobody", "nogroup")):
3124
uid = pwd.getpwnam(name).pw_uid
3125
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
3127
2043
except KeyError:
2045
uid = pwd.getpwnam("nobody").pw_uid
2046
gid = pwd.getpwnam("nobody").pw_gid
3136
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3138
2053
except OSError as error:
3139
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3140
.format(uid, gid, os.strerror(error.errno)))
3141
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)
3145
2065
# Enable all possible GnuTLS debugging
3147
2067
# "Use a log level over 10 to enable all debugging options."
3148
2068
# - GnuTLS manual
3149
gnutls.global_set_log_level(11)
2069
gnutls.library.functions.gnutls_global_set_log_level(11)
2071
@gnutls.library.types.gnutls_log_func
3152
2072
def debug_gnutls(level, string):
3153
2073
logger.debug("GnuTLS: %s", string[:-1])
3155
gnutls.global_set_log_function(debug_gnutls)
2075
(gnutls.library.functions
2076
.gnutls_global_set_log_function(debug_gnutls))
3157
2078
# Redirect stdin so all checkers get /dev/null
3158
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2079
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3159
2080
os.dup2(null, sys.stdin.fileno())
2084
# No console logging
2085
logger.removeHandler(console)
3163
2087
# Need to fork before connecting to D-Bus
3165
2089
# Close all input and output, do double fork, etc.
3168
# multiprocessing will use threads, so before we use GLib we need
3169
# to inform GLib that threads will be used.
3172
2092
global main_loop
3173
2093
# From the Avahi example code
3174
DBusGMainLoop(set_as_default=True)
3175
main_loop = GLib.MainLoop()
2094
DBusGMainLoop(set_as_default=True )
2095
main_loop = gobject.MainLoop()
3176
2096
bus = dbus.SystemBus()
3177
2097
# End of Avahi example code
3180
2100
bus_name = dbus.service.BusName("se.recompile.Mandos",
3183
old_bus_name = dbus.service.BusName(
3184
"se.bsnet.fukt.Mandos", bus,
3186
except dbus.exceptions.DBusException as e:
3187
logger.error("Disabling D-Bus:", exc_info=e)
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")
3188
2107
use_dbus = False
3189
2108
server_settings["use_dbus"] = False
3190
2109
tcp_server.use_dbus = False
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"))
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"])))
3202
2119
global multiprocessing_manager
3203
2120
multiprocessing_manager = multiprocessing.Manager()
3205
2122
client_class = Client
3207
client_class = functools.partial(ClientDBus, bus=bus)
3209
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,
2140
setting not in special_settings
2141
else special_settings[setting]
2144
in client_config.items(clientname)))
2145
for clientname in client_config.sections())
3210
2147
old_client_settings = {}
3213
# This is used to redirect stdout and stderr for checker processes
3215
wnull = open(os.devnull, "w") # A writable /dev/null
3216
# Only used if server is running in foreground but not in debug
3218
if debug or not foreground:
3221
# Get client data and settings from last running state.
2150
# Get client data and settings from last running state.
3222
2151
if server_settings["restore"]:
3224
2153
with open(stored_state_path, "rb") as stored_state:
3225
if sys.version_info.major == 2:
3226
clients_data, old_client_settings = pickle.load(
3229
bytes_clients_data, bytes_old_client_settings = (
3230
pickle.load(stored_state, encoding="bytes"))
3231
# Fix bytes to strings
3234
clients_data = {(key.decode("utf-8")
3235
if isinstance(key, bytes)
3238
bytes_clients_data.items()}
3239
del bytes_clients_data
3240
for key in clients_data:
3241
value = {(k.decode("utf-8")
3242
if isinstance(k, bytes) else k): v
3244
clients_data[key].items()}
3245
clients_data[key] = value
3247
value["client_structure"] = [
3249
if isinstance(s, bytes)
3251
value["client_structure"]]
3253
for k in ("name", "host"):
3254
if isinstance(value[k], bytes):
3255
value[k] = value[k].decode("utf-8")
3256
if not value.has_key("key_id"):
3257
value["key_id"] = ""
3258
elif not value.has_key("fingerprint"):
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
3270
for value in old_client_settings.values():
3271
if isinstance(value["host"], bytes):
3272
value["host"] = (value["host"]
2154
clients_data, old_client_settings = (
2155
pickle.load(stored_state))
3274
2156
os.remove(stored_state_path)
3275
2157
except IOError as e:
3276
if e.errno == errno.ENOENT:
3277
logger.warning("Could not load persistent state:"
3278
" {}".format(os.strerror(e.errno)))
3280
logger.critical("Could not load persistent state:",
2158
logger.warning("Could not load persistant state: {0}"
2160
if e.errno != errno.ENOENT:
3283
except EOFError as e:
3284
logger.warning("Could not load persistent state: "
3288
with PGPEngine() as pgp:
3289
for client_name, client in clients_data.items():
3290
# Skip removed clients
3291
if client_name not in client_settings:
3294
# Decide which value to use after restoring saved state.
3295
# We have three different values: Old config file,
3296
# new config file, and saved state.
3297
# New config value takes precedence if it differs from old
3298
# config value, otherwise use saved state.
3299
for name, value in client_settings[client_name].items():
3301
# For each value in new config, check if it
3302
# differs from the old config value (Except for
3303
# the "secret" attribute)
3304
if (name != "secret"
3306
old_client_settings[client_name][name])):
3307
client[name] = value
3311
# Clients who has passed its expire date can still be
3312
# enabled if its last checker was successful. A Client
3313
# whose checker succeeded before we stored its state is
3314
# assumed to have successfully run all checkers during
3316
if client["enabled"]:
3317
if datetime.datetime.utcnow() >= client["expires"]:
3318
if not client["last_checked_ok"]:
3320
"disabling client {} - Client never "
3321
"performed a successful checker".format(
3323
client["enabled"] = False
3324
elif client["last_checker_status"] != 0:
3326
"disabling client {} - Client last"
3327
" checker failed with error code"
3330
client["last_checker_status"]))
3331
client["enabled"] = False
3333
client["expires"] = (
3334
datetime.datetime.utcnow()
3335
+ client["timeout"])
3336
logger.debug("Last checker succeeded,"
3337
" keeping {} enabled".format(
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():
3340
client["secret"] = pgp.decrypt(
3341
client["encrypted_secret"],
3342
client_settings[client_name]["secret"])
3344
# If decryption fails, we use secret from new settings
3345
logger.debug("Failed to decrypt {} old secret".format(
3347
client["secret"] = (client_settings[client_name]
3350
# Add/remove clients based on new changes made to config
3351
for client_name in (set(old_client_settings)
3352
- set(client_settings)):
3353
del clients_data[client_name]
3354
for client_name in (set(client_settings)
3355
- set(old_client_settings)):
3356
clients_data[client_name] = client_settings[client_name]
3358
# Create all client objects
3359
for client_name, client in clients_data.items():
3360
tcp_server.clients[client_name] = client_class(
3363
server_settings=server_settings)
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
3365
2225
if not tcp_server.clients:
3366
2226
logger.warning("No clients defined")
3369
if pidfile is not None:
3373
print(pid, file=pidfile)
3375
logger.error("Could not write to file %r with PID %d",
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
3378
2240
del pidfilename
3380
for termsig in (signal.SIGHUP, signal.SIGTERM):
3381
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3382
lambda: main_loop.quit() and False)
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())
3386
@alternate_dbus_interfaces(
3387
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3388
class MandosDBusService(DBusObjectWithObjectManager):
2248
class MandosDBusService(dbus.service.Object):
3389
2249
"""A D-Bus proxy object"""
3391
2250
def __init__(self):
3392
2251
dbus.service.Object.__init__(self, bus, "/")
3394
2252
_interface = "se.recompile.Mandos"
3396
2254
@dbus.service.signal(_interface, signature="o")
3397
2255
def ClientAdded(self, objpath):
3401
2259
@dbus.service.signal(_interface, signature="ss")
3402
def ClientNotFound(self, key_id, address):
2260
def ClientNotFound(self, fingerprint, address):
3406
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3408
2264
@dbus.service.signal(_interface, signature="os")
3409
2265
def ClientRemoved(self, objpath, name):
3413
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3415
2269
@dbus.service.method(_interface, out_signature="ao")
3416
2270
def GetAllClients(self):
3418
return dbus.Array(c.dbus_object_path for c in
3419
tcp_server.clients.values())
3421
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2272
return dbus.Array(c.dbus_object_path
2274
tcp_server.clients.itervalues())
3423
2276
@dbus.service.method(_interface,
3424
2277
out_signature="a{oa{sv}}")
3425
2278
def GetAllClientsWithProperties(self):
3427
2280
return dbus.Dictionary(
3428
{c.dbus_object_path: c.GetAll(
3429
"se.recompile.Mandos.Client")
3430
for c in tcp_server.clients.values()},
2281
((c.dbus_object_path, c.GetAll(""))
2282
for c in tcp_server.clients.itervalues()),
3431
2283
signature="oa{sv}")
3433
2285
@dbus.service.method(_interface, in_signature="o")
3434
2286
def RemoveClient(self, object_path):
3436
for c in tcp_server.clients.values():
2288
for c in tcp_server.clients.itervalues():
3437
2289
if c.dbus_object_path == object_path:
3438
2290
del tcp_server.clients[c.name]
3439
2291
c.remove_from_connection()
3440
# Don't signal the disabling
2292
# Don't signal anything except ClientRemoved
3441
2293
c.disable(quiet=True)
3442
# Emit D-Bus signal for removal
3443
self.client_removed_signal(c)
2295
self.ClientRemoved(object_path, c.name)
3445
2297
raise KeyError(object_path)
3449
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3450
out_signature="a{oa{sa{sv}}}")
3451
def GetManagedObjects(self):
3453
return dbus.Dictionary(
3454
{client.dbus_object_path:
3456
{interface: client.GetAll(interface)
3458
client._get_all_interface_names()})
3459
for client in tcp_server.clients.values()})
3461
def client_added_signal(self, client):
3462
"""Send the new standard signal and the old signal"""
3464
# New standard signal
3465
self.InterfacesAdded(
3466
client.dbus_object_path,
3468
{interface: client.GetAll(interface)
3470
client._get_all_interface_names()}))
3472
self.ClientAdded(client.dbus_object_path)
3474
def client_removed_signal(self, client):
3475
"""Send the new standard signal and the old signal"""
3477
# New standard signal
3478
self.InterfacesRemoved(
3479
client.dbus_object_path,
3480
client._get_all_interface_names())
3482
self.ClientRemoved(client.dbus_object_path,
3485
mandos_dbus_service = MandosDBusService()
3487
# Save modules to variables to exempt the modules from being
3488
# unloaded before the function registered with atexit() is run.
3489
mp = multiprocessing
2301
class MandosDBusServiceTransitional(MandosDBusService):
2302
__metaclass__ = AlternateDBusNamesMetaclass
2303
mandos_dbus_service = MandosDBusServiceTransitional()
3493
2306
"Cleanup function; run on exit"
3497
mp.active_children()
2309
multiprocessing.active_children()
3499
2310
if not (tcp_server.clients or client_settings):
3502
2313
# Store client before exiting. Secrets are encrypted with key
3503
2314
# based on what config file has. If config file is
3504
2315
# removed/edited, old secret will thus be unrecovable.
3506
with PGPEngine() as pgp:
3507
for client in tcp_server.clients.values():
3508
key = client_settings[client.name]["secret"]
3509
client.encrypted_secret = pgp.encrypt(client.secret,
3513
# A list of attributes that can not be pickled
3515
exclude = {"bus", "changedstate", "secret",
3516
"checker", "server_settings"}
3517
for name, typ in inspect.getmembers(dbus.service
3521
client_dict["encrypted_secret"] = (client
3523
for attr in client.client_structure:
3524
if attr not in exclude:
3525
client_dict[attr] = getattr(client, attr)
3527
clients[client.name] = client_dict
3528
del client_settings[client.name]["secret"]
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"]
3531
with tempfile.NamedTemporaryFile(
3535
dir=os.path.dirname(stored_state_path),
3536
delete=False) as stored_state:
3537
pickle.dump((clients, client_settings), stored_state,
3539
tempname = stored_state.name
3540
os.rename(tempname, stored_state_path)
3541
except (IOError, OSError) as e:
3547
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3548
logger.warning("Could not save persistent state: {}"
3549
.format(os.strerror(e.errno)))
3551
logger.warning("Could not save persistent state:",
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:
3555
2349
# Delete all clients, and settings from config