90
stored_state_path = "/var/lib/mandos/clients.pickle"
92
logger = logging.getLogger()
88
#logger = logging.getLogger('mandos')
89
logger = logging.Logger('mandos')
93
90
syslogger = (logging.handlers.SysLogHandler
94
91
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
95
92
address = str("/dev/log")))
98
if_nametoindex = (ctypes.cdll.LoadLibrary
99
(ctypes.util.find_library("c"))
101
except (OSError, AttributeError):
102
def if_nametoindex(interface):
103
"Get an interface index the hard way, i.e. using fcntl()"
104
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
105
with contextlib.closing(socket.socket()) as s:
106
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
107
struct.pack(str("16s16x"),
109
interface_index = struct.unpack(str("I"),
111
return interface_index
114
def initlogger(level=logging.WARNING):
115
"""init logger and add loglevel"""
117
syslogger.setFormatter(logging.Formatter
118
('Mandos [%(process)d]: %(levelname)s:'
120
logger.addHandler(syslogger)
122
console = logging.StreamHandler()
123
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
127
logger.addHandler(console)
128
logger.setLevel(level)
131
class CryptoError(Exception):
135
class Crypto(object):
136
"""A simple class for OpenPGP symmetric encryption & decryption"""
138
self.gnupg = GnuPGInterface.GnuPG()
139
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
140
self.gnupg = GnuPGInterface.GnuPG()
141
self.gnupg.options.meta_interactive = False
142
self.gnupg.options.homedir = self.tempdir
143
self.gnupg.options.extra_args.extend(['--force-mdc',
149
def __exit__ (self, exc_type, exc_value, traceback):
157
if self.tempdir is not None:
158
# Delete contents of tempdir
159
for root, dirs, files in os.walk(self.tempdir,
161
for filename in files:
162
os.remove(os.path.join(root, filename))
164
os.rmdir(os.path.join(root, dirname))
166
os.rmdir(self.tempdir)
169
def password_encode(self, password):
170
# Passphrase can not be empty and can not contain newlines or
171
# NUL bytes. So we prefix it and hex encode it.
172
return b"mandos" + binascii.hexlify(password)
174
def encrypt(self, data, password):
175
self.gnupg.passphrase = self.password_encode(password)
176
with open(os.devnull) as devnull:
178
proc = self.gnupg.run(['--symmetric'],
179
create_fhs=['stdin', 'stdout'],
180
attach_fhs={'stderr': devnull})
181
with contextlib.closing(proc.handles['stdin']) as f:
183
with contextlib.closing(proc.handles['stdout']) as f:
184
ciphertext = f.read()
188
self.gnupg.passphrase = None
191
def decrypt(self, data, password):
192
self.gnupg.passphrase = self.password_encode(password)
193
with open(os.devnull) as devnull:
195
proc = self.gnupg.run(['--decrypt'],
196
create_fhs=['stdin', 'stdout'],
197
attach_fhs={'stderr': devnull})
198
with contextlib.closing(proc.handles['stdin'] ) as f:
200
with contextlib.closing(proc.handles['stdout']) as f:
201
decrypted_plaintext = f.read()
205
self.gnupg.passphrase = None
206
return decrypted_plaintext
93
syslogger.setFormatter(logging.Formatter
94
('Mandos [%(process)d]: %(levelname)s:'
96
logger.addHandler(syslogger)
98
console = logging.StreamHandler()
99
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
102
logger.addHandler(console)
210
104
class AvahiError(Exception):
211
105
def __init__(self, value, *args, **kwargs):
474
358
self.host = config.get("host", "")
475
359
self.created = datetime.datetime.utcnow()
477
361
self.last_approval_request = None
478
self.last_enabled = datetime.datetime.utcnow()
362
self.last_enabled = None
479
363
self.last_checked_ok = None
480
self.last_checker_status = None
481
364
self.timeout = string_to_delta(config["timeout"])
482
365
self.extended_timeout = string_to_delta(config
483
366
["extended_timeout"])
484
367
self.interval = string_to_delta(config["interval"])
368
self.disable_hook = disable_hook
485
369
self.checker = None
486
370
self.checker_initiator_tag = None
487
371
self.disable_initiator_tag = None
488
self.expires = datetime.datetime.utcnow() + self.timeout
489
373
self.checker_callback_tag = None
490
374
self.checker_command = config["checker"]
491
375
self.current_checker_command = None
376
self.last_connect = None
492
377
self._approved = None
493
378
self.approved_by_default = config.get("approved_by_default",
500
385
self.changedstate = (multiprocessing_manager
501
386
.Condition(multiprocessing_manager
503
self.client_structure = [attr for attr in
504
self.__dict__.iterkeys()
505
if not attr.startswith("_")]
506
self.client_structure.append("client_structure")
508
for name, t in inspect.getmembers(type(self),
512
if not name.startswith("_"):
513
self.client_structure.append(name)
515
# Send notice to process children that client state has changed
516
389
def send_changedstate(self):
517
with self.changedstate:
518
self.changedstate.notify_all()
390
self.changedstate.acquire()
391
self.changedstate.notify_all()
392
self.changedstate.release()
520
394
def enable(self):
521
395
"""Start this client's checker and timeout hooks"""
544
428
gobject.source_remove(self.checker_initiator_tag)
545
429
self.checker_initiator_tag = None
546
430
self.stop_checker()
431
if self.disable_hook:
432
self.disable_hook(self)
547
433
self.enabled = False
548
434
# Do not run this again if called by a gobject.timeout_add
551
437
def __del__(self):
438
self.disable_hook = None
554
def init_checker(self):
555
# Schedule a new checker to be started an 'interval' from now,
556
# and every interval from then on.
557
self.checker_initiator_tag = (gobject.timeout_add
558
(self.interval_milliseconds(),
560
# Schedule a disable() when 'timeout' has passed
561
self.disable_initiator_tag = (gobject.timeout_add
562
(self.timeout_milliseconds(),
564
# Also start a new checker *right now*.
567
441
def checker_callback(self, pid, condition, command):
568
442
"""The checker has completed, so take appropriate actions."""
569
443
self.checker_callback_tag = None
570
444
self.checker = None
571
445
if os.WIFEXITED(condition):
572
self.last_checker_status = os.WEXITSTATUS(condition)
573
if self.last_checker_status == 0:
446
exitstatus = os.WEXITSTATUS(condition)
574
448
logger.info("Checker for %(name)s succeeded",
576
450
self.checked_ok()
1910
1767
return timevalue
1770
def if_nametoindex(interface):
1771
"""Call the C function if_nametoindex(), or equivalent
1773
Note: This function cannot accept a unicode string."""
1774
global if_nametoindex
1776
if_nametoindex = (ctypes.cdll.LoadLibrary
1777
(ctypes.util.find_library("c"))
1779
except (OSError, AttributeError):
1780
logger.warning("Doing if_nametoindex the hard way")
1781
def if_nametoindex(interface):
1782
"Get an interface index the hard way, i.e. using fcntl()"
1783
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1784
with contextlib.closing(socket.socket()) as s:
1785
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1786
struct.pack(str("16s16x"),
1788
interface_index = struct.unpack(str("I"),
1790
return interface_index
1791
return if_nametoindex(interface)
1913
1794
def daemon(nochdir = False, noclose = False):
1914
1795
"""See daemon(3). Standard BSD Unix function.
2148
2024
server_settings["use_dbus"] = False
2149
2025
tcp_server.use_dbus = False
2150
2026
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2151
service = AvahiServiceToSyslog(name =
2152
server_settings["servicename"],
2153
servicetype = "_mandos._tcp",
2154
protocol = protocol, bus = bus)
2027
service = AvahiService(name = server_settings["servicename"],
2028
servicetype = "_mandos._tcp",
2029
protocol = protocol, bus = bus)
2155
2030
if server_settings["interface"]:
2156
2031
service.interface = (if_nametoindex
2157
2032
(str(server_settings["interface"])))
2164
2039
client_class = functools.partial(ClientDBusTransitional,
2167
special_settings = {
2168
# Some settings need to be accessd by special methods;
2169
# booleans need .getboolean(), etc. Here is a list of them:
2170
"approved_by_default":
2172
client_config.getboolean(section, "approved_by_default"),
2174
# Construct a new dict of client settings of this form:
2175
# { client_name: {setting_name: value, ...}, ...}
2176
# with exceptions for any special settings as defined above
2177
client_settings = dict((clientname,
2180
if setting not in special_settings
2181
else special_settings[setting]
2183
for setting, value in
2184
client_config.items(clientname)))
2185
for clientname in client_config.sections())
2187
old_client_settings = {}
2190
# Get client data and settings from last running state.
2191
if server_settings["restore"]:
2193
with open(stored_state_path, "rb") as stored_state:
2194
clients_data, old_client_settings = (pickle.load
2196
os.remove(stored_state_path)
2197
except IOError as e:
2198
logger.warning("Could not load persistent state: {0}"
2200
if e.errno != errno.ENOENT:
2203
with Crypto() as crypt:
2204
for client in clients_data:
2205
client_name = client["name"]
2207
# Decide which value to use after restoring saved state.
2208
# We have three different values: Old config file,
2209
# new config file, and saved state.
2210
# New config value takes precedence if it differs from old
2211
# config value, otherwise use saved state.
2212
for name, value in client_settings[client_name].items():
2214
# For each value in new config, check if it
2215
# differs from the old config value (Except for
2216
# the "secret" attribute)
2217
if (name != "secret" and
2218
value != old_client_settings[client_name]
2220
setattr(client, name, value)
2224
# Clients who has passed its expire date can still be
2225
# enabled if its last checker was sucessful. Clients
2226
# whose checker failed before we stored its state is
2227
# assumed to have failed all checkers during downtime.
2228
if client["enabled"] and client["last_checked_ok"]:
2229
if ((datetime.datetime.utcnow()
2230
- client["last_checked_ok"])
2231
> client["interval"]):
2232
if client["last_checker_status"] != 0:
2233
client["enabled"] = False
2235
client["expires"] = (datetime.datetime
2237
+ client["timeout"])
2239
client["changedstate"] = (multiprocessing_manager
2241
(multiprocessing_manager
2244
new_client = (ClientDBusTransitional.__new__
2245
(ClientDBusTransitional))
2246
tcp_server.clients[client_name] = new_client
2247
new_client.bus = bus
2248
for name, value in client.iteritems():
2249
setattr(new_client, name, value)
2250
client_object_name = unicode(client_name).translate(
2251
{ord("."): ord("_"),
2252
ord("-"): ord("_")})
2253
new_client.dbus_object_path = (dbus.ObjectPath
2255
+ client_object_name))
2256
DBusObjectWithProperties.__init__(new_client,
2261
tcp_server.clients[client_name] = (Client.__new__
2263
for name, value in client.iteritems():
2264
setattr(tcp_server.clients[client_name],
2041
def client_config_items(config, section):
2042
special_settings = {
2043
"approved_by_default":
2044
lambda: config.getboolean(section,
2045
"approved_by_default"),
2047
for name, value in config.items(section):
2268
tcp_server.clients[client_name].secret = (
2269
crypt.decrypt(tcp_server.clients[client_name]
2271
client_settings[client_name]
2274
# If decryption fails, we use secret from new settings
2275
tcp_server.clients[client_name].secret = (
2276
client_settings[client_name]["secret"])
2278
# Create/remove clients based on new changes made to config
2279
for clientname in set(old_client_settings) - set(client_settings):
2280
del tcp_server.clients[clientname]
2281
for clientname in set(client_settings) - set(old_client_settings):
2282
tcp_server.clients[clientname] = (client_class(name
2049
yield (name, special_settings[name]())
2053
tcp_server.clients.update(set(
2054
client_class(name = section,
2055
config= dict(client_config_items(
2056
client_config, section)))
2057
for section in client_config.sections()))
2288
2058
if not tcp_server.clients:
2289
2059
logger.warning("No clients defined")
2370
2139
service.cleanup()
2372
2141
multiprocessing.active_children()
2373
if not (tcp_server.clients or client_settings):
2376
# Store client before exiting. Secrets are encrypted with key
2377
# based on what config file has. If config file is
2378
# removed/edited, old secret will thus be unrecovable.
2380
with Crypto() as crypt:
2381
for client in tcp_server.clients.itervalues():
2382
key = client_settings[client.name]["secret"]
2383
client.encrypted_secret = crypt.encrypt(client.secret,
2387
# A list of attributes that will not be stored when
2389
exclude = set(("bus", "changedstate", "secret"))
2390
for name, typ in (inspect.getmembers
2391
(dbus.service.Object)):
2394
client_dict["encrypted_secret"] = (client
2396
for attr in client.client_structure:
2397
if attr not in exclude:
2398
client_dict[attr] = getattr(client, attr)
2400
clients.append(client_dict)
2401
del client_settings[client.name]["secret"]
2404
with os.fdopen(os.open(stored_state_path,
2405
os.O_CREAT|os.O_WRONLY|os.O_TRUNC,
2406
0600), "wb") as stored_state:
2407
pickle.dump((clients, client_settings), stored_state)
2408
except (IOError, OSError) as e:
2409
logger.warning("Could not save persistent state: {0}"
2411
if e.errno not in (errno.ENOENT, errno.EACCES):
2414
# Delete all clients, and settings from config
2415
2142
while tcp_server.clients:
2416
name, client = tcp_server.clients.popitem()
2143
client = tcp_server.clients.pop()
2418
2145
client.remove_from_connection()
2146
client.disable_hook = None
2419
2147
# Don't signal anything except ClientRemoved
2420
2148
client.disable(quiet=True)