def clone_MT19937_prng(prng):
return mt.MT19937(5489, [untemper(prng.extract_number()) for i in range(624)])
def unbitshift_left_xor(value, shift, mask):
i = 0
result = 0
while (i * shift < 32):
partMask = (0xffffffff >> (32 - shift)) << (shift * i)
part = value & partMask
value ^= (part << shift) & mask
result += part
i += 1
return np.uint32(result)
def untemper(y):
value = y
value = unbitshift_right_xor(value, 18)
value = unbitshift_left_xor(value, 15, 4022730752)
value = unbitshift_left_xor(value, 7, 2636928640)
value = unbitshift_right_xor(value, 11)
return value
def clone_MT19937_prng(prng):
return mt.MT19937(5489, [untemper(prng.extract_number()) for i in range(624)])
if __name__ == "__main__":
rng = mt.MT19937()
clone = clone_MT19937_prng(rng)
for i in range(100000):
assert(rng.extract_number() == clone.extract_number())
def crack_seed(random_number):
curr_time = int(time.time())
for seed in range(curr_time - 1000, curr_time):
if mt.MT19937(seed).extract_number() == random_number:
return seed
def get_random_number():
time.sleep(random.randint(4, 1000))
seed = int(time.time())
rng = mt.MT19937(seed)
time.sleep(random.randint(4, 1000))
return {'rand': rng.extract_number(), 'seed': seed}
def get_keystream(key):
rng = mt.MT19937(key)
while True:
yield from int(rng.extract_number()).to_bytes(4, byteorder='little')