#CSACTF2019 https://ctftime.org/task/8470 import sys, time from Crypto.Hash import SHA256 from Crypto.Cipher.AES import AESCipher flag = "Flag goes here" def encrypt(m): key = SHA256.new(flag).digest() try: text = 'rowdy123' + m.decode('base64') + flag except: return "Opps, bad input" pad = 16 - (le…