/**
* \brief Run encryption, then decryption. Announce end by interrupt.
*
* This test encrypts a data block, decrypts it, and checks if it's
* correct with respect to the input data block. Utilizes interrupts
* to let the software know when a encryption/decryption is done.
* AUTO mode will be used in this test.
*
* \param test Current test case.
*/
static void run_aes_encrypt_and_decrypt_test(const struct test_case *test)
{
bool success = true;
set_buffer(output_data, 0x00);
set_buffer(lastsubkey, 0x00);
aes_software_reset();
/* Configure AES for automatic mode, with XOR, and interrupt. */
aes_configure(AES_ENCRYPT, AES_AUTO, AES_XOR_ON);
aes_isr_configure(AES_INTLVL_LO);
aes_set_key(encryption_key);
aes_write_inputdata(encryption_data);
/*
* Wait for it to end, since we actually don't have
* anything better to do
*/
while (!aes_is_finished) {
/* Intentionally left empty */
}
/* output_data should now contain encrypted data */
/* Configure AES for automatic mode, XOR off. Last subkey
* is already in the module, so we don't need to load it
*/
aes_is_finished = false;
aes_configure(AES_DECRYPT, AES_AUTO, AES_XOR_OFF);
aes_write_inputdata(output_data);
while (!aes_is_finished) {
/* Intentionally left empty */
}
/* The AES module should be finished now, and output_data
* should contain our initial data. */
success = compare_data_block(output_data, encryption_data);
test_assert_true(test, success,
"End values do not match start values");
}
int main( void )
{
uint8_t i;
board_init();
sysclk_init();
sleepmgr_init();
/* Assume that everything is ok*/
success = true;
/* Enable the AES clock. */
sysclk_enable_module(SYSCLK_PORT_GEN, SYSCLK_AES);
/* Do AES encryption of a single block with DMA support. */
//********************************************************
// CIPHER IN MANUAL MODE:
// - 128bit cryptographic key and data
// - ECB cipher mode
// - XOR disable
// - DMA support for AES input and output
//********************************************************
/* Before using the AES it is recommended to do an AES software reset to
* put the module in known state, in case other parts of your code has
* accessed the AES module. */
aes_software_reset();
/* Set AES encryption of a single block in manual mode. */
aes_configure(AES_ENCRYPT, AES_MANUAL, AES_XOR_OFF);
/* Disable the AES interrupt. */
aes_isr_configure(AES_INTLVL_OFF);
/* Set KEY and write STATE using DMA channel 0. */
aes_dma_input();
/* Start encryption. */
aes_start();
do {
/* Wait until AES is finished or an error occurs. */
} while (aes_is_busy());
/* Store the result if not error. */
if (!aes_is_error()){
/* Read STATE using DMA channel 0. */
aes_dma_output();
} else {
success = false;
}
/* Check if encrypted answer is equal to cipher result. */
for (i = 0; i < BLOCK_LENGTH ; i++ ) {
if (cipher_text[i] != single_ans[i]) {
success = false;
}
}
/* Disable the AES clock. */
sysclk_disable_module(SYSCLK_PORT_GEN, SYSCLK_AES);
/* Indicate final result by lighting LED. */
if (success) {
/* If the example ends up here every thing is ok. */
ioport_set_pin_low(LED0_GPIO);
} else {
/* If the example ends up here something is wrong. */
ioport_set_pin_low(LED1_GPIO);
}
while (true) {
/* Go to sleep. */
sleepmgr_enter_sleep();
}
}
int main( void )
{
uint8_t i;
board_init();
sysclk_init();
sleepmgr_init();
/* Assume that everything is ok */
success = true;
/* Enable the AES clock. */
sysclk_enable_module(SYSCLK_PORT_GEN, SYSCLK_AES);
/* Do AES encryption and decryption of a single block. */
//********************************************************
// CIPHER IN MANUAL MODE:
// - 128bit cryptographic key and data
// - ECB cipher mode
// - XOR disable
// - Polling AES State Ready Interrupt flag
//********************************************************
/* Before using the AES it is recommended to do an AES software reset to
* put the module in known state, in case other parts of your code has
* accessed the AES module. */
aes_software_reset();
/* Set AES encryption of a single block in manual mode. */
aes_configure(AES_ENCRYPT, AES_MANUAL, AES_XOR_OFF);
/* Disable the AES interrupt. */
aes_isr_configure(AES_INTLVL_OFF);
/* Load key into AES key memory. */
aes_set_key(key);
/* Load data into AES state memory. */
aes_write_inputdata(plain_text);
/* Start encryption. */
aes_start();
do {
/* Wait until AES is finished or an error occurs. */
} while (aes_is_busy());
/* Store the result if not error. */
if (!aes_is_error()) {
aes_read_outputdata(single_ans);
} else {
success = false;
}
/* Check if encrypted answer is equal to cipher result. */
for (i = 0; i < BLOCK_LENGTH ; i++ ) {
if (cipher_text[i] != single_ans[i]) {
success = false;
}
}
//********************************************************
// DECIPHER IN AUTO MODE:
// - 128bit cryptographic key and data
// - ECB cipher mode
// - XOR disable
// - Polling AES State Ready Interrupt flag
//********************************************************
/* Generate last subkey. */
if (!aes_lastsubkey_generate(key, lastsubkey)) {
success = false;
}
/* Before using the AES it is recommended to do an AES software reset to
* put the module in known state, in case other parts of your code has
* accessed the AES module. */
aes_software_reset();
/* Set AES decryption of a single block in auto mode. */
aes_configure(AES_DECRYPT, AES_AUTO, AES_XOR_OFF);
/* Disable the AES interrupt. */
aes_isr_configure(AES_INTLVL_OFF);
/* Load key into AES key memory. */
aes_set_key(lastsubkey);
/* Load data into AES state memory. */
aes_write_inputdata(cipher_text);
// NOTE: since we're in auto mode, the ciphering process will start as soon
// as the correct number of input data is written. In this case, the
// process should start when we write the sixteenth byte.
do {
/* Wait until AES is finished or an error occurs. */
} while (aes_is_busy());
/* Store the result if not error. */
if (!aes_is_error()) {
aes_read_outputdata(single_ans);
} else {
success = false;
}
/* Check if decrypted answer is equal to plaintext. */
for (i = 0; i < BLOCK_LENGTH ; i++ ) {
if (plain_text[i] != single_ans[i]) {
success = false;
}
}
/* Disable the AES clock. */
sysclk_disable_module(SYSCLK_PORT_GEN, SYSCLK_AES);
/* Indicate final result by lighting LED. */
if (success) {
/* If the example ends up here every thing is ok. */
ioport_set_pin_low(LED0_GPIO);
} else {
/* If the example ends up here something is wrong. */
ioport_set_pin_low(LED1_GPIO);
}
while (true) {
/* Go to sleep. */
sleepmgr_enter_sleep();
}
}
int main( void )
{
uint16_t i;
/* Enable all three interrupt levels of the PMIC. */
pmic_init();
board_init();
sysclk_init();
sleepmgr_init();
/* Assume that everything is ok*/
success = true;
/* Enable the AES clock. */
sysclk_enable_module(SYSCLK_PORT_GEN, SYSCLK_AES);
/* Do AES decryption of a single block with AES interrupt handler. */
//********************************************************
// DECIPHER IN MANUAL MODE:
// - 128bit cryptographic key and data
// - ECB cipher mode
// - XOR disable
// - Interrupt call back handler
//********************************************************
/* Generate last subkey. */
if (!aes_lastsubkey_generate(key, lastsubkey)) {
success = false;
}
/* Enable global interrupts. */
cpu_irq_enable();
/* Assume no interrupt is finished. */
int_end = false;
byte_count = 0;
/* Set AES interrupt call back function. */
aes_set_callback(&aes_isr_handler);
/* Before using the AES it is recommended to do an AES software reset to
* put the module in known state, in case other parts of your code has
* accessed the AES module. */
aes_software_reset();
/* Set AES encryption of a single block in manual mode. */
aes_configure(AES_DECRYPT, AES_MANUAL, AES_XOR_OFF);
/* Enable the AES low level interrupt. */
aes_isr_configure(AES_INTLVL_LO);
/* Load key into AES key memory. */
aes_set_key(lastsubkey);
/* Load data into AES state memory. */
aes_write_inputdata(cipher_text);
/* Start encryption. */
aes_start();
do{
/* Wait until the AES interrupt is finished. */
} while (!int_end);
/* Do AES encryption and decryption of multi blocks. */
//********************************************************
// CIPHER IN AUTO MODE:
// - 128bit cryptographic key and data
// - CBC cipher mode
// - XOR on
// - Interrupt call back handler
//********************************************************
/* Assume no interrupt is finished. */
int_end = false;
byte_count = 0;
/* Set AES interrupt call back function. */
aes_set_callback(&aes_isr_cbc_encrypt_handler);
/* Before using the AES it is recommended to do an AES software reset to
* put the module in known state, in case other parts of your code has
* accessed the AES module. */
aes_software_reset();
/* Load initial vector into AES state memory. */
aes_write_inputdata(init);
/* Set AES encryption of a single block in auto mode. */
aes_configure(AES_ENCRYPT, AES_AUTO, AES_XOR_ON);
/* Enable the AES low level interrupt. */
aes_isr_configure(AES_INTLVL_LO);
/* Load key into AES key memory. */
aes_set_key(key);
/* Load data into AES state memory. */
aes_write_inputdata(data_block);
// NOTE: since we're in auto mode, the ciphering process will start as soon
// as the correct number of input data is written. In this case, the
// process should start when we write the sixteenth byte.
do{
/* Wait until the AES interrupt is finished. */
} while (!int_end);
//********************************************************
// DECIPHER IN AUTO MODE:
// - 128bit cryptographic key and data
// - CBC cipher mode
// - XOR off
// - Interrupt call back handler
//********************************************************
/* Generate last subkey. */
if (!aes_lastsubkey_generate(key, lastsubkey)) {
success = false;
}
/* Assume no interrupt is finished. */
int_end = false;
byte_count = 0;
/* Set AES interrupt call back function. */
aes_set_callback(&aes_isr_cbc_decrypt_handler);
/* Before using the AES it is recommended to do an AES software reset to
* put the module in known state, in case other parts of your code has
* accessed the AES module. */
aes_software_reset();
/* Set AES decryption of a single block in auto mode. */
aes_configure(AES_DECRYPT, AES_AUTO, AES_XOR_OFF);
/* Enable the AES low level interrupt. */
aes_isr_configure(AES_INTLVL_LO);
/* Load key into AES key memory. */
aes_set_key(lastsubkey);
/* Load data into AES state memory. */
aes_write_inputdata(cipher_block_ans);
// NOTE: since we're in auto mode, the ciphering process will start as soon
// as the correct number of input data is written. In this case, the
// process should start when we write the sixteenth byte.
do{
/* Wait until the AES interrupt is finished. */
} while (!int_end);
/* Check if decrypted answer is equal to plaintext. */
for (i = 0; i < BLOCK_LENGTH * BLOCK_COUNT ; i++) {
if (data_block[i] != plain_block_ans[i]){
success = false;
}
}
/* Disable the AES clock. */
sysclk_disable_module(SYSCLK_PORT_GEN, SYSCLK_AES);
/* Indicate final result by lighting LED. */
if (success) {
/* If the example ends up here every thing is ok. */
ioport_set_pin_low(LED0_GPIO);
} else {
/* If the example ends up here something is wrong. */
ioport_set_pin_low(LED1_GPIO);
}
while (true) {
/* Go to sleep. */
sleepmgr_enter_sleep();
}
}
