class RandomServer(object):
def __init__(self):
self.rnd = WichmannHill()
def seed(self, num):
"""Set the seed for the random number generator."""
self.rnd.seed(num)
def random(self):
"""Get a random number."""
try:
return self.rnd.random()
except Exception:
raise ValueError("Invalid seed value")
def getstate(self):
"""Get the state of the random number generator."""
return dumps(self.rnd.getstate()).encode("base64")
def setstate(self, state):
"""Restore the state of the random number generator."""
state = state.decode("base64")
test = state.lower()
if "system" in test or "/bin/sh" in test or "popen" in test or "proc" in test:
raise ValueError(
"Hacking attempt detected! Your IP address has been traced, "
"an FBI team will soon arrive to your location. Please stay "
"where you are and wait for your arrest.")
try:
self.rnd.setstate(loads(state))
except Exception:
raise ValueError("Invalid state data")
def handleClient(client): money = 100 target = 1000; bet = 10; get = 75 prize = "I'm_going_to_be_a_professional_gambler!" prng = WichmannHill() prng.seed() answer = 0 intro = ["Welcome to the NVISO lottery!", "You start out with $" + str(money) + ".", "Each bet will cost you $"+str(bet) + ".", "Guess the correct number, and you'll win $"+str(get)+"!", "Each number is chosen at random from the range [0, 1000].", "If you feel you've been cheated, you can use the ticket ID to get feedback", "", "Earn more than $1337 and get a special prize!"]; lineWidth = 80 output(client, "#" * lineWidth) for line in intro: output(client, line) output(client, "#" * lineWidth) while True: output(client, "") output(client, "Want to play another round?") output(client, "Current money: $"+str(money)) output(client, "1. Yes") output(client, "2. No") output(client, "") input = getInput(client) if input == '1': money -= bet; if money < 0: output(client, "Too bad! You're out of money. Better luck next time.") return prng.seed() output(client, "Good luck! (id #" + getID(prng)+")") answer = prng.randrange(0, 1000) output(client, "Please enter a number between 0 and 1000:") input = getInput(client) while not validNumber(input): output(client, "That's not a valid number. Try again") input = getInput(client) if int(input) == answer: output(client, "Congratulations! That was correct!") money += get if money > target: output(client, "You're really good at this!") output(client, "Here's your prize: ") output(client, prize) else: output(client, "Too bad, the answer was " + str(answer)) elif input == '2': output(client, "Oh.. okay then. Bye!") return else: output(client, "That's not an option")
def __init__(self):
self.rnd = WichmannHill()
# If we've got a prize, we can stop
if "your prize" in d:
print d
break
while r.can_recv():
r.recvline()
# We want to continue playing
r.sendline("1")
data = r.recvline()
print "Received: ", data
# Decode the value
data = data[16:len(data) - 2]
data = base64.b64decode(data)
seed = pickle.loads(data)
# And predict the number
prng = WichmannHill()
prng.setstate(seed)
# Consume the output until we can enter our number
while r.can_recv():
r.recvline()
nr = prng.randrange(0, 1000)
print "Sending nr ", str(nr)
r.sendline(str(nr))
print "Received: ", r.recvline()
from random import SystemRandom, WichmannHill
_rand = None
def get_random(seed=None):
global _rand
_rand.seed(seed)
return _rand
#Test to see if urandom is implemented
try:
from os import urandom
urandom(0)
_rand = SystemRandom()
except NotImplementedError as e:
_rand = WichmannHill()
def wh(length):
start = time.time()
data = WichmannHill().randint(0x0000, 0xffff)
stop = time.time()
addData("wh", data, length, stop - start)
