AN3270

AES peripheral driver

Doc ID 17919 Rev 2

13/23

2

AES peripheral driver

An AES driver written in C language (stm8l15x_aes.c/.h) is available in the

STM8L15x_StdPeriph_Lib standard firmware package. This driver provides an abstraction

layer to make it easier to use the AES hardware accelerator.

A flowchart of encryption mode using the driver is shown in Figure 10.

To help you get started quickly, a set of examples is available in the

STM8L15x_StdPeriph_Lib package:

●

AES_KeyDerivation: how to get the decryption key from the encryption key

●

AES_EncryptionDecryption: how to encrypt and decrypt a single data block

●

AES_EncryptionDecryptionBlocks: how to use the DMA peripheral to manage

reading/writing data from/to AES data registers