oldschool.py

from secret import flag, insecure_prng_generator
import os
import random
from pwn import *
padding1 = os.urandom(random.randint(1,100))
padding2 = os.urandom(random.randint(1,100))
message = padding1 + flag + padding2

seed = random.randint(10**9, 10**10)
key = bytes(list(map(lambda x: x % 256, insecure_prng_generator(seed, len(message)))))
print(xor(message, key).hex())

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