#!/usr/local/bin/pythonfrom io import BytesIO
from os import _exit
from pathlib import Path
from pickle import Pickler, Unpickler
from sys import stderr, stdin, stdout
from time import time
from faker import Faker
Faker.seed(time())
fake = Faker("en_US")
flag = Path("flag").read_text()
defprint(_):
stdout.buffer.write(f"{_}\n".encode())
stdout.buffer.flush()
definput(_=None, limit: int =-1):
if _:
print(_)
_ = stdin.buffer.readline(limit)
stdin.buffer.flush()
return _
defbye(_):
print(_)
_exit(0)
players = [fake.unique.first_name().encode() for _ in range(50)]
print("Welcome to this jail game!")
print(f"Play this game to get the flag with these players: {players}!")
name = input("So... What's your name?", 300).strip()
assert name notin players, "You are already joined!"print(f"Welcome {name}!")
players.append(name)
biox = BytesIO()
Pickler(biox).dump(
(
name,
players,
flag,
)
)
data = bytearray(biox.getvalue())
num = input("Enter a random number to win: ", 1)[0]
assert num < len(data), "You are not allowed to win!"data[num] +=1data[num] %=0xFFdel name, players, flag
biox.close()
stderr.close()
try:
safe_dic = {
"__builtins__": None,
"n": BytesIO(data),
"F": type("f", (Unpickler,), {"find_class": lambda*_: "H4cker"}),
}
name, players, _ = eval("F(n).load()", safe_dic, {})
if name in players:
del _
print(f"{name} joined this game, but here is no flag!")
exceptException:
print("What happened? IDK...")
finally:
bye("Break this jail to get the flag!")
