107
106
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
108
107
with contextlib.closing(socket.socket()) as s:
109
108
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
110
struct.pack(b"16s16x", interface))
111
interface_index = struct.unpack("I", ifreq[16:20])[0]
109
struct.pack(str("16s16x"),
111
interface_index = struct.unpack(str("I"),
112
113
return interface_index
115
116
def initlogger(debug, level=logging.WARNING):
116
117
"""init logger and add loglevel"""
119
syslogger = (logging.handlers.SysLogHandler
121
logging.handlers.SysLogHandler.LOG_DAEMON,
122
address = "/dev/log"))
123
119
syslogger.setFormatter(logging.Formatter
124
120
('Mandos [%(process)d]: %(levelname)s:'
176
174
def password_encode(self, password):
177
175
# Passphrase can not be empty and can not contain newlines or
178
176
# NUL bytes. So we prefix it and hex encode it.
179
encoded = b"mandos" + binascii.hexlify(password)
180
if len(encoded) > 2048:
181
# GnuPG can't handle long passwords, so encode differently
182
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
183
.replace(b"\n", b"\\n")
184
.replace(b"\0", b"\\x00"))
177
return b"mandos" + binascii.hexlify(password)
187
179
def encrypt(self, data, password):
188
passphrase = self.password_encode(password)
189
with tempfile.NamedTemporaryFile(dir=self.tempdir
191
passfile.write(passphrase)
193
proc = subprocess.Popen(['gpg', '--symmetric',
197
stdin = subprocess.PIPE,
198
stdout = subprocess.PIPE,
199
stderr = subprocess.PIPE)
200
ciphertext, err = proc.communicate(input = data)
201
if proc.returncode != 0:
180
self.gnupg.passphrase = self.password_encode(password)
181
with open(os.devnull, "w") as devnull:
183
proc = self.gnupg.run(['--symmetric'],
184
create_fhs=['stdin', 'stdout'],
185
attach_fhs={'stderr': devnull})
186
with contextlib.closing(proc.handles['stdin']) as f:
188
with contextlib.closing(proc.handles['stdout']) as f:
189
ciphertext = f.read()
193
self.gnupg.passphrase = None
203
194
return ciphertext
205
196
def decrypt(self, data, password):
206
passphrase = self.password_encode(password)
207
with tempfile.NamedTemporaryFile(dir = self.tempdir
209
passfile.write(passphrase)
211
proc = subprocess.Popen(['gpg', '--decrypt',
215
stdin = subprocess.PIPE,
216
stdout = subprocess.PIPE,
217
stderr = subprocess.PIPE)
218
decrypted_plaintext, err = proc.communicate(input
220
if proc.returncode != 0:
197
self.gnupg.passphrase = self.password_encode(password)
198
with open(os.devnull, "w") as devnull:
200
proc = self.gnupg.run(['--decrypt'],
201
create_fhs=['stdin', 'stdout'],
202
attach_fhs={'stderr': devnull})
203
with contextlib.closing(proc.handles['stdin']) as f:
205
with contextlib.closing(proc.handles['stdout']) as f:
206
decrypted_plaintext = f.read()
210
self.gnupg.passphrase = None
222
211
return decrypted_plaintext
225
214
class AvahiError(Exception):
226
215
def __init__(self, value, *args, **kwargs):
227
216
self.value = value
228
return super(AvahiError, self).__init__(value, *args,
217
super(AvahiError, self).__init__(value, *args, **kwargs)
218
def __unicode__(self):
219
return unicode(repr(self.value))
231
221
class AvahiServiceError(AvahiError):
450
446
"fingerprint", "host", "interval",
451
447
"last_approval_request", "last_checked_ok",
452
448
"last_enabled", "name", "timeout")
453
client_defaults = { "timeout": "PT5M",
454
"extended_timeout": "PT15M",
449
client_defaults = { "timeout": "5m",
450
"extended_timeout": "15m",
456
452
"checker": "fping -q -- %%(host)s",
458
"approval_delay": "PT0S",
459
"approval_duration": "PT1S",
454
"approval_delay": "0s",
455
"approval_duration": "1s",
460
456
"approved_by_default": "True",
461
457
"enabled": "True",
460
def timeout_milliseconds(self):
461
"Return the 'timeout' attribute in milliseconds"
462
return timedelta_to_milliseconds(self.timeout)
464
def extended_timeout_milliseconds(self):
465
"Return the 'extended_timeout' attribute in milliseconds"
466
return timedelta_to_milliseconds(self.extended_timeout)
468
def interval_milliseconds(self):
469
"Return the 'interval' attribute in milliseconds"
470
return timedelta_to_milliseconds(self.interval)
472
def approval_delay_milliseconds(self):
473
return timedelta_to_milliseconds(self.approval_delay)
465
476
def config_parser(config):
466
477
"""Construct a new dict of client settings of this form:
704
710
# in normal mode, that is already done by daemon(),
705
711
# and in debug mode we don't want to. (Stdin is
706
712
# always replaced by /dev/null.)
707
# The exception is when not debugging but nevertheless
708
# running in the foreground; use the previously
711
if (not self.server_settings["debug"]
712
and self.server_settings["foreground"]):
713
popen_args.update({"stdout": wnull,
715
713
self.checker = subprocess.Popen(command,
719
716
except OSError as error:
720
717
logger.error("Failed to start subprocess",
723
719
self.checker_callback_tag = (gobject.child_watch_add
724
720
(self.checker.pid,
725
721
self.checker_callback,
727
723
# The checker may have completed before the gobject
728
724
# watch was added. Check for this.
730
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
731
except OSError as error:
732
if error.errno == errno.ECHILD:
733
# This should never happen
734
logger.error("Child process vanished",
725
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
739
727
gobject.source_remove(self.checker_callback_tag)
740
728
self.checker_callback(pid, status, command)
1282
1270
approval_delay = notifychangeproperty(dbus.UInt64,
1283
1271
"ApprovalDelay",
1285
lambda td: td.total_seconds()
1273
timedelta_to_milliseconds)
1287
1274
approval_duration = notifychangeproperty(
1288
1275
dbus.UInt64, "ApprovalDuration",
1289
type_func = lambda td: td.total_seconds() * 1000)
1276
type_func = timedelta_to_milliseconds)
1290
1277
host = notifychangeproperty(dbus.String, "Host")
1291
1278
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1292
type_func = lambda td:
1293
td.total_seconds() * 1000)
1280
timedelta_to_milliseconds)
1294
1281
extended_timeout = notifychangeproperty(
1295
1282
dbus.UInt64, "ExtendedTimeout",
1296
type_func = lambda td: td.total_seconds() * 1000)
1283
type_func = timedelta_to_milliseconds)
1297
1284
interval = notifychangeproperty(dbus.UInt64,
1300
lambda td: td.total_seconds()
1287
timedelta_to_milliseconds)
1302
1288
checker_command = notifychangeproperty(dbus.String, "Checker")
1304
1290
del notifychangeproperty
1958
1949
self.socket.setsockopt(socket.SOL_SOCKET,
1959
1950
SO_BINDTODEVICE,
1960
(self.interface + "\0")
1962
1953
except socket.error as error:
1963
1954
if error.errno == errno.EPERM:
1964
logger.error("No permission to bind to"
1965
" interface %s", self.interface)
1955
logger.error("No permission to"
1956
" bind to interface %s",
1966
1958
elif error.errno == errno.ENOPROTOOPT:
1967
1959
logger.error("SO_BINDTODEVICE not available;"
1968
1960
" cannot bind to interface %s",
1969
1961
self.interface)
1970
1962
elif error.errno == errno.ENODEV:
1971
logger.error("Interface %s does not exist,"
1972
" cannot bind", self.interface)
1963
logger.error("Interface %s does not"
1964
" exist, cannot bind",
1975
1968
# Only bind(2) the socket if we really need to.
2103
def rfc3339_duration_to_delta(duration):
2104
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2106
>>> rfc3339_duration_to_delta("P7D")
2107
datetime.timedelta(7)
2108
>>> rfc3339_duration_to_delta("PT60S")
2109
datetime.timedelta(0, 60)
2110
>>> rfc3339_duration_to_delta("PT60M")
2111
datetime.timedelta(0, 3600)
2112
>>> rfc3339_duration_to_delta("PT24H")
2113
datetime.timedelta(1)
2114
>>> rfc3339_duration_to_delta("P1W")
2115
datetime.timedelta(7)
2116
>>> rfc3339_duration_to_delta("PT5M30S")
2117
datetime.timedelta(0, 330)
2118
>>> rfc3339_duration_to_delta("P1DT3M20S")
2119
datetime.timedelta(1, 200)
2122
# Parsing an RFC 3339 duration with regular expressions is not
2123
# possible - there would have to be multiple places for the same
2124
# values, like seconds. The current code, while more esoteric, is
2125
# cleaner without depending on a parsing library. If Python had a
2126
# built-in library for parsing we would use it, but we'd like to
2127
# avoid excessive use of external libraries.
2129
# New type for defining tokens, syntax, and semantics all-in-one
2130
Token = collections.namedtuple("Token",
2131
("regexp", # To match token; if
2132
# "value" is not None,
2133
# must have a "group"
2135
"value", # datetime.timedelta or
2137
"followers")) # Tokens valid after
2139
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2140
# the "duration" ABNF definition in RFC 3339, Appendix A.
2141
token_end = Token(re.compile(r"$"), None, frozenset())
2142
token_second = Token(re.compile(r"(\d+)S"),
2143
datetime.timedelta(seconds=1),
2144
frozenset((token_end,)))
2145
token_minute = Token(re.compile(r"(\d+)M"),
2146
datetime.timedelta(minutes=1),
2147
frozenset((token_second, token_end)))
2148
token_hour = Token(re.compile(r"(\d+)H"),
2149
datetime.timedelta(hours=1),
2150
frozenset((token_minute, token_end)))
2151
token_time = Token(re.compile(r"T"),
2153
frozenset((token_hour, token_minute,
2155
token_day = Token(re.compile(r"(\d+)D"),
2156
datetime.timedelta(days=1),
2157
frozenset((token_time, token_end)))
2158
token_month = Token(re.compile(r"(\d+)M"),
2159
datetime.timedelta(weeks=4),
2160
frozenset((token_day, token_end)))
2161
token_year = Token(re.compile(r"(\d+)Y"),
2162
datetime.timedelta(weeks=52),
2163
frozenset((token_month, token_end)))
2164
token_week = Token(re.compile(r"(\d+)W"),
2165
datetime.timedelta(weeks=1),
2166
frozenset((token_end,)))
2167
token_duration = Token(re.compile(r"P"), None,
2168
frozenset((token_year, token_month,
2169
token_day, token_time,
2171
# Define starting values
2172
value = datetime.timedelta() # Value so far
2174
followers = frozenset((token_duration,)) # Following valid tokens
2175
s = duration # String left to parse
2176
# Loop until end token is found
2177
while found_token is not token_end:
2178
# Search for any currently valid tokens
2179
for token in followers:
2180
match = token.regexp.match(s)
2181
if match is not None:
2183
if token.value is not None:
2184
# Value found, parse digits
2185
factor = int(match.group(1), 10)
2186
# Add to value so far
2187
value += factor * token.value
2188
# Strip token from string
2189
s = token.regexp.sub("", s, 1)
2192
# Set valid next tokens
2193
followers = found_token.followers
2196
# No currently valid tokens were found
2197
raise ValueError("Invalid RFC 3339 duration")
2202
2096
def string_to_delta(interval):
2203
2097
"""Parse a string and return a datetime.timedelta
2302
2191
parser.add_argument("--no-dbus", action="store_false",
2303
2192
dest="use_dbus", help="Do not provide D-Bus"
2304
" system bus interface", default=None)
2193
" system bus interface")
2305
2194
parser.add_argument("--no-ipv6", action="store_false",
2306
dest="use_ipv6", help="Do not use IPv6",
2195
dest="use_ipv6", help="Do not use IPv6")
2308
2196
parser.add_argument("--no-restore", action="store_false",
2309
2197
dest="restore", help="Do not restore stored"
2310
" state", default=None)
2311
2199
parser.add_argument("--socket", type=int,
2312
2200
help="Specify a file descriptor to a network"
2313
2201
" socket to use instead of creating one")
2314
2202
parser.add_argument("--statedir", metavar="DIR",
2315
2203
help="Directory to save/restore state in")
2316
parser.add_argument("--foreground", action="store_true",
2317
help="Run in foreground", default=None)
2318
parser.add_argument("--no-zeroconf", action="store_false",
2319
dest="zeroconf", help="Do not use Zeroconf",
2322
2205
options = parser.parse_args()
2324
2207
if options.check:
2326
fail_count, test_count = doctest.testmod()
2327
sys.exit(os.EX_OK if fail_count == 0 else 1)
2329
2212
# Default values for config file for server-global settings
2330
2213
server_defaults = { "interface": "",
2374
2255
for option in ("interface", "address", "port", "debug",
2375
2256
"priority", "servicename", "configdir",
2376
2257
"use_dbus", "use_ipv6", "debuglevel", "restore",
2377
"statedir", "socket", "foreground", "zeroconf"):
2258
"statedir", "socket"):
2378
2259
value = getattr(options, option)
2379
2260
if value is not None:
2380
2261
server_settings[option] = value
2382
2263
# Force all strings to be unicode
2383
2264
for option in server_settings.keys():
2384
if isinstance(server_settings[option], bytes):
2385
server_settings[option] = (server_settings[option]
2387
# Force all boolean options to be boolean
2388
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2389
"foreground", "zeroconf"):
2390
server_settings[option] = bool(server_settings[option])
2391
# Debug implies foreground
2392
if server_settings["debug"]:
2393
server_settings["foreground"] = True
2265
if type(server_settings[option]) is str:
2266
server_settings[option] = unicode(server_settings[option])
2394
2267
# Now we have our good server settings in "server_settings"
2396
2269
##################################################################
2398
if (not server_settings["zeroconf"] and
2399
not (server_settings["port"]
2400
or server_settings["socket"] != "")):
2401
parser.error("Needs port or socket to work without"
2404
2271
# For convenience
2405
2272
debug = server_settings["debug"]
2406
2273
debuglevel = server_settings["debuglevel"]
2524
2384
use_dbus = False
2525
2385
server_settings["use_dbus"] = False
2526
2386
tcp_server.use_dbus = False
2528
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2529
service = AvahiServiceToSyslog(name =
2530
server_settings["servicename"],
2531
servicetype = "_mandos._tcp",
2532
protocol = protocol, bus = bus)
2533
if server_settings["interface"]:
2534
service.interface = (if_nametoindex
2535
(server_settings["interface"]
2387
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2388
service = AvahiServiceToSyslog(name =
2389
server_settings["servicename"],
2390
servicetype = "_mandos._tcp",
2391
protocol = protocol, bus = bus)
2392
if server_settings["interface"]:
2393
service.interface = (if_nametoindex
2394
(str(server_settings["interface"])))
2538
2396
global multiprocessing_manager
2539
2397
multiprocessing_manager = multiprocessing.Manager()
2644
2490
clients_data[client_name] = client_settings[client_name]
2646
2492
# Create all client objects
2647
for client_name, client in clients_data.items():
2493
for client_name, client in clients_data.iteritems():
2648
2494
tcp_server.clients[client_name] = client_class(
2649
name = client_name, settings = client,
2650
server_settings = server_settings)
2495
name = client_name, settings = client)
2652
2497
if not tcp_server.clients:
2653
2498
logger.warning("No clients defined")
2656
if pidfile is not None:
2660
pidfile.write("{}\n".format(pid).encode("utf-8"))
2662
logger.error("Could not write to file %r with PID %d",
2504
pidfile.write(str(pid) + "\n".encode("utf-8"))
2507
logger.error("Could not write to file %r with PID %d",
2510
# "pidfile" was never created
2665
2512
del pidfilename
2667
2514
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())