app.py #!/usr/bin/env python3from Crypto.Util.Padding import pad, unpadfrom Crypto.Cipher import AESfrom Crypto.Random import get_random_bytes import binasciifrom flag import FLAG BLOCKSIZE = 16 def generate_body(key: bytes) -> dict: “”” Generate encrypted body to give to user “”” pt = ‘u=user’ iv = get_random_bytes(16) cipher = AES.new(key, AES.MODE_CBC, iv = iv) ct_hex = cipher.encrypt(pad(pt.encode(), block_size=BLOCKSIZE)).hex() […]