class Header(object):
format = struct.Struct("!QQQQQQ")
size = len(checksum().digest()) + format.size
@classmethod
def unpack(cls, data):
digest = data[cls.format.size:]
if digest != checksum(data[:cls.format.size]).digest():
raise HeaderError("header data does not match the checksum")
unpacked = cls.format.unpack(data[:cls.format.size])
return cls(*unpacked)
def __init__(self, last_commit, count, last, tail, open_head, open_tail):
self.last_commit = last_commit
self.count = count
self.last = last
self.tail = tail
self.open_head = open_head
self.open_tail = open_tail
def pack(self):
data = self.format.pack(self.last_commit, self.count, self.last,
self.tail, self.open_head, self.open_tail)
return data + checksum(data).digest()
def validate(data):
sh = data.pop()
if checksum(str(data)).hexdigest() == sh:
return True
else:
return False
try:
scheduled = int(now())
seat(scheduled)
rc = RC4(KEY)
ticket = rc.decrypt(raw_input(welcome(scheduled)))
if "invalid" in ticket:
free = raw_input(" Wanna Free Ticket? [y/N] ")
if free.lower() == "y":
data = ["free", "guest"]
data.append(str(scheduled + 60))
else:
data = ["book"]
data.append(raw_input(" Booking NOW!!!\n Name: "))
data.append(str(scheduled + 60**2 * 4 * 4))
data.append(checksum(str(data)).hexdigest())
print " Your Ticket:", rc.encrypt(data),
else:
if ticket[0] == "flag":
flag = FLAG
elif ticket[0] == "book":
if validate(ticket) and "flag" in ticket:
if int(now()) > int(ticket[2]):
flag = FLAG
else:
flag = "ToO SoOn"
else:
flag = ticket[1]
else:
flag = ""
congrat(flag)
def pack(self):
data = self.format.pack(self.last_commit, self.count, self.last,
self.tail, self.open_head, self.open_tail)
return data + checksum(data).digest()
def unpack(cls, data):
digest = data[cls.format.size:]
if digest != checksum(data[:cls.format.size]).digest():
raise HeaderError("header data does not match the checksum")
unpacked = cls.format.unpack(data[:cls.format.size])
return cls(*unpacked)
def pack(self):
data = self.format.pack(self.last_commit,
self.count, self.last, self.tail,
self.open_head, self.open_tail)
return data + checksum(data).digest()
def unpack(cls, data):
digest = data[cls.format.size:]
if digest != checksum(data[:cls.format.size]).digest():
raise HeaderError("header data does not match the checksum")
unpacked = cls.format.unpack(data[:cls.format.size])
return cls(*unpacked)