AN3270

AES block processing

Doc ID 17919 Rev 2

17/23

3.3

Using the software implementation of AES chaining modes

An example is available in the firmware associated with this application note to show you

how to add a chaining mode implementation to your application.

The example performs both encryption and decryption of a text entered through

hyperterminal (or a compatible communication software) using the available chaining

modes. The key is stored in the data EEPROM of the STM8L16x device.

Figure 14. below gives a screenshot of encryption/decryption selection.

Figure 14.

Encryption / decryption selection