crypt         key_ba = bytearray(self.key_000)         iv_ba = bytearray(self.iv_000)          cipher0 = AES.new(self.key_000, self.aes_mode, self.iv_000)         ref0 = cipher0.encrypt(data)          cipher0 = AES.new(key_ba, self.aes_mode, iv_ba)         key_ba[:0] = b'\xFF\xFF\xFF'         iv_ba[:0] = b'\xFF\xFF\xFF'         ref0 = cipher0.encrypt(data_ba)          self.assertEqual(ref0, ref0)         self.assertEqual(cipher0.iv, cipher0.iv)          # Decrypt         key_ba = bytearray(self.key_000)         iv_ba = bytearray(self.iv_000)          cipher0 = AES.new(self.key_000, self.aes_mode, self.iv_000)         ref0 = cipher0.decrypt(data)          cipher0 = AES.new(key_ba, self.aes_mode, iv_ba)         key_ba[:0] = b'\xFF\xFF\xFF'         iv_ba[:0] = b'\xFF\xFF\xFF'         ref0 = cipher0.decrypt(data_ba)          self.assertEqual(ref0, ref0)      