script.py

import random
import os
import requests
import time
from datetime import datetime, timezone
from Crypto.Cipher import AES

FLAG = os.environ.get("FLAG", "glovo{f4k3_fl4g}").encode()


def blend_key(key_bytes):
    key_int = int(key_bytes.hex(), 16)
    current_ts = int(time.time())
    print(
        f"{datetime.fromtimestamp(current_ts, tz=timezone.utc).strftime('%Y-%m-%d %H:%M:%S UTC')} - Starting shuffling process"
    )
    key_int *= random.randint(1, 9999999)
    key_int *= random.randint(1, 1234567)
    key_int *= random.randint(1, 99999)
    key_int += 998877665544332211 * 13 // 9833 + 123456789
    key_int *= current_ts
    return key_int


def main():
    key = os.getenv("SECRET_KEY").encode()
    iv = b"product_security"
    cipher = AES.new(key, AES.MODE_OFB, iv)
    encrypted_flag = cipher.encrypt(FLAG)
    shuffled_key = blend_key(key)

    body = f"Your shuffled key:\n{shuffled_key}\n\nHere's your encrypted flag:\n{encrypted_flag.hex()}"
    print(body)


if __name__ == "__main__":
    main()