/**
* \brief Application entry point for usart_dmac_serial example.
*
* \return Unused (ANSI-C compatibility).
*/
int main(void)
{
/* Initialize the SAM system. */
sysclk_init();
board_init();
/* Configure UART for debug message output. */
configure_console();
/* Output example information. */
puts(STRING_HEADER);
/* Configure USART. */
configure_usart();
/* Configure DMAC. */
configure_dmac();
/* Configure DMAC RX channel. */
configure_dmac_rx();
while (1) {
}
}
/**
* \brief ECB mode encryption and decryption test with DMA.
*/
static void ecb_mode_test_dma(void)
{
/* Configure DMAC. */
configure_dmac();
/* Disable DMAC channel. */
dmac_channel_disable(DMAC, AES_DMA_TX_CH);
dmac_channel_disable(DMAC, AES_DMA_RX_CH);
printf("\r\n-----------------------------------\r\n");
printf("- 128bit cryptographic key\r\n");
printf("- ECB cipher mode\r\n");
printf("- DMA mode\r\n");
printf("- input of 4 32bit words with DMA\r\n");
printf("-----------------------------------\r\n");
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_IDATAR0_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, &g_aes_cfg);
/* Set the cryptographic key. */
aes_write_key(AES, key128);
/* The initialization vector is not used by the ECB cipher mode. */
/* Write the data to be ciphered by DMA. */
aes_dma_transmit_config(ref_plain_text, AES_EXAMPLE_REFBUF_SIZE);
aes_dma_receive_config(output_data, AES_EXAMPLE_REFBUF_SIZE);
/* Enable DMAC channel. */
dmac_channel_enable(DMAC, AES_DMA_RX_CH);
dmac_channel_enable(DMAC, AES_DMA_TX_CH);
/* Wait for the end of the encryption process. */
while (false == state) {
}
/* Disable DMAC channel. */
dmac_channel_disable(DMAC, AES_DMA_TX_CH);
dmac_channel_disable(DMAC, AES_DMA_RX_CH);
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");
}
printf("\r\n-----------------------------------\r\n");
printf("- 128bit cryptographic key\r\n");
printf("- ECB decipher mode\r\n");
printf("- DMA mode\r\n");
printf("- input of 4 32bit words with DMA\r\n");
printf("-----------------------------------\r\n");
state = false;
/* Configure the AES. */
g_aes_cfg.encrypt_mode = AES_DECRYPTION;
g_aes_cfg.key_size = AES_KEY_SIZE_128;
g_aes_cfg.start_mode = AES_IDATAR0_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, &g_aes_cfg);
/* Set the cryptographic key. */
aes_write_key(AES, key128);
/* The initialization vector is not used by the ECB cipher mode. */
/* Write the data to be ciphered by DMA. */
aes_dma_transmit_config(ref_cipher_text_ecb, AES_EXAMPLE_REFBUF_SIZE);
aes_dma_receive_config(output_data, AES_EXAMPLE_REFBUF_SIZE);
/* Enable DMAC channel. */
dmac_channel_enable(DMAC, AES_DMA_RX_CH);
dmac_channel_enable(DMAC, AES_DMA_TX_CH);
/* Wait for the end of the decryption process. */
while (false == state) {
}
/* Disable DMAC channel. */
dmac_channel_disable(DMAC, AES_DMA_TX_CH);
dmac_channel_disable(DMAC, AES_DMA_RX_CH);
/* check the result. */
if ((ref_plain_text[0] != output_data[0]) ||
(ref_plain_text[1] != output_data[1]) ||
(ref_plain_text[2] != output_data[2]) ||
(ref_plain_text[3] != output_data[3])) {
printf("\r\nKO!!!\r\n");
} else {
printf("\r\nOK!!!\r\n");
}
/* Disable DMAC module */
dmac_disable(DMAC);
}
/**
* \brief Test ECB mode encryption and decryption with DMA.
*
* \param test Current test case.
*/
static void run_ecb_mode_test_dma(const struct test_case *test)
{
/* Configure DMAC. */
configure_dmac();
/* Disable DMAC channel. */
dmac_channel_disable(DMAC, AES_DMA_TX_CH);
dmac_channel_disable(DMAC, AES_DMA_RX_CH);
/* 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_DMA_MODE;
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, &g_aes_cfg);
/* Set the cryptographic key. */
aes_write_key(AES, key128);
/* The initialization vector is not used by the ECB cipher mode. */
/* Write the data to be ciphered by DMA. */
aes_dma_transmit_config(ref_plain_text, AES_EXAMPLE_REFBUF_SIZE);
aes_dma_receive_config(output_data, AES_EXAMPLE_REFBUF_SIZE);
/* Enable DMAC channel. */
dmac_channel_enable(DMAC, AES_DMA_RX_CH);
dmac_channel_enable(DMAC, AES_DMA_TX_CH);
/* Wait for the end of the encryption process. */
delay_ms(30);
/* Disable DMAC channel. */
dmac_channel_disable(DMAC, AES_DMA_TX_CH);
dmac_channel_disable(DMAC, AES_DMA_RX_CH);
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])) {
flag = false;
} else {
flag = true;
}
test_assert_true(test, flag == true, "ECB mode encryption not work!");
/* Configure the AES. */
g_aes_cfg.encrypt_mode = AES_DECRYPTION;
g_aes_cfg.key_size = AES_KEY_SIZE_128;
g_aes_cfg.start_mode = AES_DMA_MODE;
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, &g_aes_cfg);
/* Set the cryptographic key. */
aes_write_key(AES, key128);
/* The initialization vector is not used by the ECB cipher mode. */
/* Write the data to be ciphered by DMA. */
aes_dma_transmit_config(ref_cipher_text_ecb, AES_EXAMPLE_REFBUF_SIZE);
aes_dma_receive_config(output_data, AES_EXAMPLE_REFBUF_SIZE);
/* Enable DMAC channel. */
dmac_channel_enable(DMAC, AES_DMA_RX_CH);
dmac_channel_enable(DMAC, AES_DMA_TX_CH);
/* Wait for the end of the decryption process. */
delay_ms(30);
/* Disable DMAC channel. */
dmac_channel_disable(DMAC, AES_DMA_TX_CH);
dmac_channel_disable(DMAC, AES_DMA_RX_CH);
/* check the result. */
if ((ref_plain_text[0] != output_data[0]) ||
(ref_plain_text[1] != output_data[1]) ||
(ref_plain_text[2] != output_data[2]) ||
(ref_plain_text[3] != output_data[3])) {
flag = false;
} else {
flag = true;
}
test_assert_true(test, flag == true, "ECB mode decryption not work!");
/* Disable DMAC module */
dmac_disable(DMAC);
}