oracle_padding.py 文件源码

def cipher(clear, key, IV):
    pad_len = 8 - len(clear) % 8 # length of padding
    padding = chr(pad_len) * pad_len # PKCS5 padding content
    clear += padding
    cipher = DES.new( key, DES.MODE_CBC, IV )
    return base64.urlsafe_b64encode(IV + cipher.encrypt(clear))