3.8.3.2.2 Workflow

  1. Configure ECB mode encryption with DMA and run test. 
    
    state = false;

    /* Configure the AES. */
    g_aes_cfg.encrypt_mode = AES_ENCRYPTION;
    g_aes_cfg.key_size = AES_KEY_SIZE_128;
    g_aes_cfg.start_mode = AES_AUTO_START;
    g_aes_cfg.opmode = AES_ECB_MODE;
    g_aes_cfg.cfb_size = AES_CFB_SIZE_128;
    g_aes_cfg.lod = false;
    aes_set_config(&aes_instance,AES, &g_aes_cfg);

    /* Set the cryptographic key. */
    aes_write_key(&aes_instance, key128);

    /* The initialization vector is not used by the ECB cipher mode. */

    dma_start_transfer_job(&example_resource_tx);
    aes_set_new_message(&aes_instance);
    aes_clear_new_message(&aes_instance);

    /* Wait DMA transfer */
    while (false == state) {
    }

    /* Wait for the end of the encryption process. */
    while (!(aes_get_status(&aes_instance) & AES_ENCRYPTION_COMPLETE)) {
    }

    state = false;
    dma_start_transfer_job(&example_resource_rx);

    /* Wait DMA transfer */
    while (false == state) {
    }

    if ((ref_cipher_text_ecb[0] != output_data[0]) ||
            (ref_cipher_text_ecb[1] != output_data[1]) ||
            (ref_cipher_text_ecb[2] != output_data[2]) ||
            (ref_cipher_text_ecb[3] != output_data[3])) {
        printf("\r\nKO!!!\r\n");
    } else {
        printf("\r\nOK!!!\r\n");
    }