177
175
return b"mandos" + binascii.hexlify(password)
179
177
def encrypt(self, data, password):
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
178
passphrase = self.password_encode(password)
179
with tempfile.NamedTemporaryFile(dir=self.tempdir
181
passfile.write(passphrase)
183
proc = subprocess.Popen(['gpg', '--symmetric',
187
stdin = subprocess.PIPE,
188
stdout = subprocess.PIPE,
189
stderr = subprocess.PIPE)
190
ciphertext, err = proc.communicate(input = data)
191
if proc.returncode != 0:
194
193
return ciphertext
196
195
def decrypt(self, data, password):
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
196
passphrase = self.password_encode(password)
197
with tempfile.NamedTemporaryFile(dir = self.tempdir
199
passfile.write(passphrase)
201
proc = subprocess.Popen(['gpg', '--decrypt',
205
stdin = subprocess.PIPE,
206
stdout = subprocess.PIPE,
207
stderr = subprocess.PIPE)
208
decrypted_plaintext, err = proc.communicate(input
210
if proc.returncode != 0:
211
212
return decrypted_plaintext
439
440
runtime_expansions: Allowed attributes for runtime expansion.
440
441
expires: datetime.datetime(); time (UTC) when a client will be
441
442
disabled, or None
443
server_settings: The server_settings dict from main()
444
446
runtime_expansions = ("approval_delay", "approval_duration",
445
"created", "enabled", "fingerprint",
446
"host", "interval", "last_checked_ok",
447
"created", "enabled", "expires",
448
"fingerprint", "host", "interval",
449
"last_approval_request", "last_checked_ok",
447
450
"last_enabled", "name", "timeout")
448
client_defaults = { "timeout": "5m",
449
"extended_timeout": "15m",
451
client_defaults = { "timeout": "PT5M",
452
"extended_timeout": "PT15M",
451
454
"checker": "fping -q -- %%(host)s",
453
"approval_delay": "0s",
454
"approval_duration": "1s",
456
"approval_delay": "PT0S",
457
"approval_duration": "PT1S",
455
458
"approved_by_default": "True",
456
459
"enabled": "True",
690
696
self.current_checker_command)
691
697
# Start a new checker if needed
692
698
if self.checker is None:
699
# Escape attributes for the shell
700
escaped_attrs = dict(
701
(attr, re.escape(unicode(getattr(self, attr))))
703
self.runtime_expansions)
694
# In case checker_command has exactly one % operator
695
command = self.checker_command % self.host
697
# Escape attributes for the shell
698
escaped_attrs = dict(
700
re.escape(unicode(str(getattr(self, attr, "")),
704
self.runtime_expansions)
707
command = self.checker_command % escaped_attrs
708
except TypeError as error:
709
logger.error('Could not format string "%s"',
710
self.checker_command, exc_info=error)
711
return True # Try again later
705
command = self.checker_command % escaped_attrs
706
except TypeError as error:
707
logger.error('Could not format string "%s"',
708
self.checker_command, exc_info=error)
709
return True # Try again later
712
710
self.current_checker_command = command
714
712
logger.info("Starting checker %r for %s",
717
715
# in normal mode, that is already done by daemon(),
718
716
# and in debug mode we don't want to. (Stdin is
719
717
# always replaced by /dev/null.)
718
# The exception is when not debugging but nevertheless
719
# running in the foreground; use the previously
722
if (not self.server_settings["debug"]
723
and self.server_settings["foreground"]):
724
popen_args.update({"stdout": wnull,
720
726
self.checker = subprocess.Popen(command,
723
self.checker_callback_tag = (gobject.child_watch_add
725
self.checker_callback,
727
# The checker may have completed before the gobject
728
# watch was added. Check for this.
729
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
731
gobject.source_remove(self.checker_callback_tag)
732
self.checker_callback(pid, status, command)
733
730
except OSError as error:
734
731
logger.error("Failed to start subprocess",
734
self.checker_callback_tag = (gobject.child_watch_add
736
self.checker_callback,
738
# The checker may have completed before the gobject
739
# watch was added. Check for this.
741
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
742
except OSError as error:
743
if error.errno == errno.ECHILD:
744
# This should never happen
745
logger.error("Child process vanished",
750
gobject.source_remove(self.checker_callback_tag)
751
self.checker_callback(pid, status, command)
736
752
# Re-run this periodically if run by gobject.timeout_add
1906
1922
use_ipv6: Boolean; to use IPv6 or not
1908
1924
def __init__(self, server_address, RequestHandlerClass,
1909
interface=None, use_ipv6=True):
1925
interface=None, use_ipv6=True, socketfd=None):
1926
"""If socketfd is set, use that file descriptor instead of
1927
creating a new one with socket.socket().
1910
1929
self.interface = interface
1912
1931
self.address_family = socket.AF_INET6
1932
if socketfd is not None:
1933
# Save the file descriptor
1934
self.socketfd = socketfd
1935
# Save the original socket.socket() function
1936
self.socket_socket = socket.socket
1937
# To implement --socket, we monkey patch socket.socket.
1939
# (When socketserver.TCPServer is a new-style class, we
1940
# could make self.socket into a property instead of monkey
1941
# patching socket.socket.)
1943
# Create a one-time-only replacement for socket.socket()
1944
@functools.wraps(socket.socket)
1945
def socket_wrapper(*args, **kwargs):
1946
# Restore original function so subsequent calls are
1948
socket.socket = self.socket_socket
1949
del self.socket_socket
1950
# This time only, return a new socket object from the
1951
# saved file descriptor.
1952
return socket.fromfd(self.socketfd, *args, **kwargs)
1953
# Replace socket.socket() function with wrapper
1954
socket.socket = socket_wrapper
1955
# The socketserver.TCPServer.__init__ will call
1956
# socket.socket(), which might be our replacement,
1957
# socket_wrapper(), if socketfd was set.
1913
1958
socketserver.TCPServer.__init__(self, server_address,
1914
1959
RequestHandlerClass)
1915
1961
def server_bind(self):
1916
1962
"""This overrides the normal server_bind() function
1917
1963
to bind to an interface if one was specified, and also NOT to
1926
1972
self.socket.setsockopt(socket.SOL_SOCKET,
1927
1973
SO_BINDTODEVICE,
1974
str(self.interface + '\0'))
1930
1975
except socket.error as error:
1931
1976
if error.errno == errno.EPERM:
1932
logger.error("No permission to"
1933
" bind to interface %s",
1977
logger.error("No permission to bind to"
1978
" interface %s", self.interface)
1935
1979
elif error.errno == errno.ENOPROTOOPT:
1936
1980
logger.error("SO_BINDTODEVICE not available;"
1937
1981
" cannot bind to interface %s",
1938
1982
self.interface)
1939
1983
elif error.errno == errno.ENODEV:
1940
logger.error("Interface %s does not"
1941
" exist, cannot bind",
1984
logger.error("Interface %s does not exist,"
1985
" cannot bind", self.interface)
1945
1988
# Only bind(2) the socket if we really need to.
2116
def rfc3339_duration_to_delta(duration):
2117
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2119
>>> rfc3339_duration_to_delta("P7D")
2120
datetime.timedelta(7)
2121
>>> rfc3339_duration_to_delta("PT60S")
2122
datetime.timedelta(0, 60)
2123
>>> rfc3339_duration_to_delta("PT60M")
2124
datetime.timedelta(0, 3600)
2125
>>> rfc3339_duration_to_delta("PT24H")
2126
datetime.timedelta(1)
2127
>>> rfc3339_duration_to_delta("P1W")
2128
datetime.timedelta(7)
2129
>>> rfc3339_duration_to_delta("PT5M30S")
2130
datetime.timedelta(0, 330)
2131
>>> rfc3339_duration_to_delta("P1DT3M20S")
2132
datetime.timedelta(1, 200)
2135
# Parsing an RFC 3339 duration with regular expressions is not
2136
# possible - there would have to be multiple places for the same
2137
# values, like seconds. The current code, while more esoteric, is
2138
# cleaner without depending on a parsing library. If Python had a
2139
# built-in library for parsing we would use it, but we'd like to
2140
# avoid excessive use of external libraries.
2142
# New type for defining tokens, syntax, and semantics all-in-one
2143
Token = collections.namedtuple("Token",
2144
("regexp", # To match token; if
2145
# "value" is not None,
2146
# must have a "group"
2148
"value", # datetime.timedelta or
2150
"followers")) # Tokens valid after
2152
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2153
# the "duration" ABNF definition in RFC 3339, Appendix A.
2154
token_end = Token(re.compile(r"$"), None, frozenset())
2155
token_second = Token(re.compile(r"(\d+)S"),
2156
datetime.timedelta(seconds=1),
2157
frozenset((token_end,)))
2158
token_minute = Token(re.compile(r"(\d+)M"),
2159
datetime.timedelta(minutes=1),
2160
frozenset((token_second, token_end)))
2161
token_hour = Token(re.compile(r"(\d+)H"),
2162
datetime.timedelta(hours=1),
2163
frozenset((token_minute, token_end)))
2164
token_time = Token(re.compile(r"T"),
2166
frozenset((token_hour, token_minute,
2168
token_day = Token(re.compile(r"(\d+)D"),
2169
datetime.timedelta(days=1),
2170
frozenset((token_time, token_end)))
2171
token_month = Token(re.compile(r"(\d+)M"),
2172
datetime.timedelta(weeks=4),
2173
frozenset((token_day, token_end)))
2174
token_year = Token(re.compile(r"(\d+)Y"),
2175
datetime.timedelta(weeks=52),
2176
frozenset((token_month, token_end)))
2177
token_week = Token(re.compile(r"(\d+)W"),
2178
datetime.timedelta(weeks=1),
2179
frozenset((token_end,)))
2180
token_duration = Token(re.compile(r"P"), None,
2181
frozenset((token_year, token_month,
2182
token_day, token_time,
2184
# Define starting values
2185
value = datetime.timedelta() # Value so far
2187
followers = frozenset(token_duration,) # Following valid tokens
2188
s = duration # String left to parse
2189
# Loop until end token is found
2190
while found_token is not token_end:
2191
# Search for any currently valid tokens
2192
for token in followers:
2193
match = token.regexp.match(s)
2194
if match is not None:
2196
if token.value is not None:
2197
# Value found, parse digits
2198
factor = int(match.group(1), 10)
2199
# Add to value so far
2200
value += factor * token.value
2201
# Strip token from string
2202
s = token.regexp.sub("", s, 1)
2205
# Set valid next tokens
2206
followers = found_token.followers
2209
# No currently valid tokens were found
2210
raise ValueError("Invalid RFC 3339 duration")
2072
2215
def string_to_delta(interval):
2073
2216
"""Parse a string and return a datetime.timedelta
2167
2316
parser.add_argument("--no-dbus", action="store_false",
2168
2317
dest="use_dbus", help="Do not provide D-Bus"
2169
" system bus interface")
2318
" system bus interface", default=None)
2170
2319
parser.add_argument("--no-ipv6", action="store_false",
2171
dest="use_ipv6", help="Do not use IPv6")
2320
dest="use_ipv6", help="Do not use IPv6",
2172
2322
parser.add_argument("--no-restore", action="store_false",
2173
2323
dest="restore", help="Do not restore stored"
2324
" state", default=None)
2325
parser.add_argument("--socket", type=int,
2326
help="Specify a file descriptor to a network"
2327
" socket to use instead of creating one")
2175
2328
parser.add_argument("--statedir", metavar="DIR",
2176
2329
help="Directory to save/restore state in")
2330
parser.add_argument("--foreground", action="store_true",
2331
help="Run in foreground", default=None)
2178
2333
options = parser.parse_args()
2205
2362
# Convert the SafeConfigParser object to a dict
2206
2363
server_settings = server_config.defaults()
2207
2364
# Use the appropriate methods on the non-string config options
2208
for option in ("debug", "use_dbus", "use_ipv6"):
2365
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2209
2366
server_settings[option] = server_config.getboolean("DEFAULT",
2211
2368
if server_settings["port"]:
2212
2369
server_settings["port"] = server_config.getint("DEFAULT",
2371
if server_settings["socket"]:
2372
server_settings["socket"] = server_config.getint("DEFAULT",
2374
# Later, stdin will, and stdout and stderr might, be dup'ed
2375
# over with an opened os.devnull. But we don't want this to
2376
# happen with a supplied network socket.
2377
if 0 <= server_settings["socket"] <= 2:
2378
server_settings["socket"] = os.dup(server_settings
2214
2380
del server_config
2216
2382
# Override the settings from the config file with command line
2451
2642
# Create all client objects
2452
2643
for client_name, client in clients_data.iteritems():
2453
2644
tcp_server.clients[client_name] = client_class(
2454
name = client_name, settings = client)
2645
name = client_name, settings = client,
2646
server_settings = server_settings)
2456
2648
if not tcp_server.clients:
2457
2649
logger.warning("No clients defined")
2463
pidfile.write(str(pid) + "\n".encode("utf-8"))
2466
logger.error("Could not write to file %r with PID %d",
2469
# "pidfile" was never created
2652
if pidfile is not None:
2656
pidfile.write(str(pid) + "\n".encode("utf-8"))
2658
logger.error("Could not write to file %r with PID %d",
2471
2661
del pidfilename
2472
signal.signal(signal.SIGINT, signal.SIG_IGN)
2474
2663
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2475
2664
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())