/usr/share/pyshared/nuauth_command/command_dec.py is in nuauth-utils 2.4.3-2.1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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import datetime
import IPy
PROTO_VERSION = "NuFW 0.1"
class Message:
def __str__(self):
raise NotImplementedError()
def __repr__(self):
return '<%s %s>' % (self.__class__.__name__, str(self))
class Answer(Message):
def __init__(self, ok, content):
self.ok = ok
self.content = content
def __str__(self):
return "ok=%s content=%r" % (self.ok, self.content)
class Uptime(Message):
def __init__(self, start, diff):
self.start = start
self.diff = datetime.timedelta(seconds=diff)
def __str__(self):
return "Uptime: %s since %s" % (self.diff, self.start)
class User(Message):
def __init__(self, client_version, socket, name, addr, sport, uid, groups,
connect_timestamp, uptime, expire,
sysname, release, version, activated):
self.client_version = client_version
self.socket = socket
self.name = name
self.addr = addr
self.sport = sport
self.uid = uid
self.groups = groups
self.connect_timestamp = connect_timestamp
self.uptime = datetime.timedelta(seconds=uptime)
if expire < 0:
self.expire = None
else:
self.expire = datetime.timedelta(seconds=expire)
self.sysname = sysname
self.release = release
self.version = version
self.activated = activated
def __str__(self):
addr = self.addr.strCompressed()
groups = ", ".join([ str(group) for group in self.groups])
if self.expire:
expire = ", %s" % self.expire
else:
expire = ""
return "#%s: %r at %s (port %s) %s since %s\n id: %s, groups: %s%s\n %s %s (%s)" % (
self.socket, self.name, addr,
self.sport, self.uptime, self.connect_timestamp,
self.uid, groups, expire,
self.sysname, self.release, self.version)
class NuFW:
def __init__(self, version, socket, peername, connect_timestamp, uptime, usage, alive):
self.version = version
self.socket = socket
self.peername = peername
self.connect_timestamp = connect_timestamp
self.uptime = datetime.timedelta(seconds=uptime)
self.usage = usage
self.alive = alive
def __str__(self):
addr = self.peername.strCompressed()
return "#%s: nufw at %s, %s since %s (usage=%s, alive=%s)" % (
self.socket, addr, self.uptime, self.connect_timestamp,
self.usage, self.alive)
class Decoder:
def __init__(self, data):
self.data = data
self.index = 0
self.end = len(data)
def decode(self, maxlen=None, check_end=False):
oldend = self.end
if maxlen is not None:
self.end = maxlen
bytecode = self.read("c")
try:
decoder = self.DECODER[bytecode]
except KeyError, err:
raise ValueError("decode() error: invalid bytecode (%r)" % bytecode)
try:
value = decoder(self)
except (struct.error, KeyError), err:
raise ValueError("decode() error: %s" % err)
if check_end and self.index != self.end:
raise IndexError("Data at the end: %r" % self.data[self.index:self.end])
self.end = oldend
return value
def readMany(self, format):
size = struct.calcsize(format)
if self.end < (self.index + size):
raise IndexError("Buffer underflow")
value = struct.unpack(format, self.data[self.index:self.index+size])
self.index += size
return value
def read(self, format):
value = self.readMany(format)
assert len(value) == 1
return value[0]
def checkBytecode(self, expected):
bytecode = self.read("c")
if bytecode != expected:
raise ValueError("invalid bytecode: %r instead of %r" % (
bytecode, expected))
# --- Low level ----
def decode_bool(self):
return (self.read("!B") == 1)
def decode_int32(self):
return self.read("!i")
def decode_string(self):
size = self.read("!i")
text = self.read("!%us" % size)
try:
text = unicode(text, "UTF-8", "strict")
except UnicodeDecodeError:
text = unicode(text, "ISO-8859-1", "strict")
return text
def decode_ipv6(self):
raw = self.readMany("!16B")
value = reduce(lambda x,y: x*256+y, raw)
return IPy.IP(value)
def decode_timestamp(self):
sec = self.read("!I")
return datetime.datetime.fromtimestamp(sec)
def decode_tuple(self):
count = self.read("!i")
items = []
for index in xrange(count):
items.append( self.decode(check_end=False) )
return items
# --- High level ----
def readBool(self):
self.checkBytecode('b')
return self.decode_bool()
def readInt32(self):
self.checkBytecode('i')
return self.decode_int32()
def readTimestamp(self):
self.checkBytecode('t')
return self.decode_timestamp()
def readString(self):
self.checkBytecode('s')
return self.decode_string()
def readIPv6(self):
self.checkBytecode('p')
return self.decode_ipv6()
def readTuple(self):
self.checkBytecode('(')
return self.decode_tuple()
def decode_answer(self):
size = self.readInt32()
ok = self.readInt32()
content = self.decode(self.index + size)
return Answer(ok == 1, content)
def decode_uptime(self):
index = self.index
start = self.readTimestamp()
diff = self.readInt32()
return Uptime(start, diff)
def decode_user(self):
index = self.index
version = self.readInt32()
socket = self.readInt32()
name = self.readString()
addr = self.readIPv6()
sport = self.readInt32()
uid = self.readInt32()
groups = self.readTuple()
timestamp = self.readTimestamp()
uptime = self.readInt32()
expire = self.readInt32()
sysname = self.readString()
release = self.readString()
version = self.readString()
activated = self.readBool()
return User(version, socket, name, addr, sport,
uid, groups, timestamp, uptime, expire,
sysname, release, version, activated)
def decode_nufw(self):
index = self.index
version = self.readInt32()
socket = self.readInt32()
peername = self.readIPv6()
timestamp = self.readTimestamp()
uptime = self.readInt32()
usage = self.readInt32()
alive = self.readBool()
return NuFW(version, socket, peername, timestamp, uptime, usage, alive)
DECODER = {
'b': decode_bool,
'i': decode_int32,
's': decode_string,
'(': decode_tuple,
'p': decode_ipv6,
't': decode_timestamp,
'a': decode_answer,
'U': decode_uptime,
'u': decode_user,
'w': decode_nufw,
}
def decode(data):
return Decoder(data).decode()
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