/*
* AES-CTR buffer encryption/decryption
*/
int aes_crypt_ctr( aes_context *ctx,
size_t length,
size_t *nc_off,
unsigned char nonce_counter[16],
unsigned char stream_block[16],
const unsigned char *input,
unsigned char *output )
{
if( CRYP_AES_CTR(ctx->dir, nonce_counter, ctx->key, ctx->keySize, (uint8_t*)input, length, (uint8_t*)output) == ERROR ) {
printf("ERROR in CRYP_AES_CTR.\n");
return -1;
}
return 0;
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/*!< At this stage the microcontroller clock setting is already configured,
this is done through SystemInit() function which is called from startup
files (startup_stm32f40_41xxx.s/startup_stm32f427_437xx.s/startup_stm32f429_439xx.s)
before to branch to application main.
*/
/* USARTx configured as follow:
- BaudRate = 115200 baud
- Word Length = 8 Bits
- One Stop Bit
- No parity
- Hardware flow control disabled (RTS and CTS signals)
- Receive and transmit enabled
*/
USART_Config();
/* Enable CRYP clock */
RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_CRYP, ENABLE);
while(1)
{
/* Display Plain Data*/
Display_PlainData(AES_TEXT_SIZE);
/******************************************************************************/
/* AES mode ECB */
/******************************************************************************/
/*=====================================================
Encryption ECB mode
======================================================*/
PressToContinue();
/****************************************/
/* AES 128 **/
/****************************************/
/* Encrypt the plaintext message*/
if(CRYP_AES_ECB(MODE_ENCRYPT, AES128key, 128, Plaintext, AES_TEXT_SIZE, Encryptedtext) == SUCCESS)
{
/* Display encrypted Data*/
Display_EncryptedData(ECB,128,AES_TEXT_SIZE);
}
/****************************************/
/* AES 192 **/
/****************************************/
/* Encrypt the plaintext message*/
if(CRYP_AES_ECB(MODE_ENCRYPT,AES192key,192,Plaintext,AES_TEXT_SIZE,Encryptedtext) == SUCCESS)
{
/* Display encrypted Data*/
Display_EncryptedData(ECB,192,AES_TEXT_SIZE);
}
/****************************************/
/* AES 256 **/
/****************************************/
/* Encrypt the plaintext message*/
if(CRYP_AES_ECB(MODE_ENCRYPT,AES256key,256,Plaintext,AES_TEXT_SIZE,Encryptedtext) == SUCCESS)
{
/* Display encrypted Data*/
Display_EncryptedData(ECB, 256,AES_TEXT_SIZE);
}
/*=====================================================
Decryption in ECB mode
======================================================*/
PressToContinue();
/****************************************/
/* AES 128 **/
/****************************************/
/* Decrypt the plaintext message */
if(CRYP_AES_ECB(MODE_DECRYPT,AES128key,128,Ciphertext,AES_TEXT_SIZE,Decryptedtext) == SUCCESS)
{
/* Display decrypted data*/
Display_DecryptedData(ECB,128,AES_TEXT_SIZE);
}
/****************************************/
/* AES 192 **/
/****************************************/
/* Decrypt the plaintext message */
if(CRYP_AES_ECB(MODE_DECRYPT,AES192key, 192,Ciphertext, AES_TEXT_SIZE,Decryptedtext) == SUCCESS)
{
/* Display decrypted data*/
Display_DecryptedData(ECB, 192,AES_TEXT_SIZE);
}
/****************************************/
/* AES 256 **/
/****************************************/
/* Decrypt the plaintext message */
if(CRYP_AES_ECB(MODE_DECRYPT,AES256key, 256,Ciphertext, AES_TEXT_SIZE,Decryptedtext) == SUCCESS)
{
/* Display decrypted data*/
Display_DecryptedData(ECB,256,AES_TEXT_SIZE);
}
/******************************************************************************/
/* AES mode CBC */
/******************************************************************************/
PressToContinue();
/*=====================================================
Encryption CBC mode
======================================================*/
/****************************************/
/* AES 128 **/
/****************************************/
/* Encrypt the plaintext message*/
if(CRYP_AES_CBC(MODE_ENCRYPT,IV_1,AES128key,128,Plaintext,AES_TEXT_SIZE,Encryptedtext) == SUCCESS)
{
/* Display encrypted Data*/
Display_EncryptedData(CBC,128,AES_TEXT_SIZE);
}
/****************************************/
/* AES 192 **/
/****************************************/
/* Encrypt the plaintext message*/
if(CRYP_AES_CBC(MODE_ENCRYPT,IV_1,AES192key,192,Plaintext,AES_TEXT_SIZE,Encryptedtext) == SUCCESS)
{
/* Display encrypted Data*/
Display_EncryptedData(CBC,192,AES_TEXT_SIZE);
}
/****************************************/
/* AES 256 **/
/****************************************/
/* Encrypt the plaintext message*/
if(CRYP_AES_CBC(MODE_ENCRYPT,IV_1,AES256key,256,Plaintext,AES_TEXT_SIZE,Encryptedtext) == SUCCESS)
{
/* Display encrypted Data*/
Display_EncryptedData(CBC, 256,AES_TEXT_SIZE);
}
/*=====================================================
Decryption in CBC mode
======================================================*/
PressToContinue();
/* Deinitializes the CRYP peripheral */
CRYP_DeInit();
/****************************************/
/* AES 128 **/
/****************************************/
/* Decrypt the plaintext message */
if(CRYP_AES_CBC(MODE_DECRYPT,IV_1,AES128key,128,Ciphertext,AES_TEXT_SIZE,Decryptedtext) == SUCCESS)
{
/* Display decrypted data*/
Display_DecryptedData(CBC,128,AES_TEXT_SIZE);
}
/****************************************/
/* AES 192 **/
/****************************************/
/* Deinitializes the CRYP peripheral */
CRYP_DeInit();
/* Decrypt the plaintext message */
if(CRYP_AES_CBC(MODE_DECRYPT,IV_1,AES192key, 192,Ciphertext, AES_TEXT_SIZE,Decryptedtext) == SUCCESS)
{
/* Display decrypted data*/
Display_DecryptedData(CBC, 192,AES_TEXT_SIZE);
}
/****************************************/
/* AES 256 **/
/****************************************/
/* Deinitializes the CRYP peripheral */
CRYP_DeInit();
/* Decrypt the plaintext message */
if(CRYP_AES_CBC(MODE_DECRYPT,IV_1,AES256key, 256,Ciphertext, AES_TEXT_SIZE,Decryptedtext) == SUCCESS)
{
/* Display decrypted data*/
Display_DecryptedData(CBC,256,AES_TEXT_SIZE);
}
/******************************************************************************/
/* AES mode CTR */
/******************************************************************************/
/*=====================================================
Encryption CTR mode
======================================================*/
PressToContinue();
/****************************************/
/* AES 128 **/
/****************************************/
/* Encrypt the plaintext message*/
if(CRYP_AES_CTR(MODE_ENCRYPT,IV_1,AES128key,128,Plaintext,AES_TEXT_SIZE,Encryptedtext) == SUCCESS)
{
/* Display encrypted Data*/
Display_EncryptedData(CTR,128, AES_TEXT_SIZE);
}
/****************************************/
/* AES 192 **/
/****************************************/
/* Encrypt the plaintext message*/
if(CRYP_AES_CTR(MODE_ENCRYPT,IV_1,AES192key,192,Plaintext,AES_TEXT_SIZE,Encryptedtext) == SUCCESS)
{
/* Display encrypted Data*/
Display_EncryptedData(CTR,192, AES_TEXT_SIZE);
}
/****************************************/
/* AES 256 **/
/****************************************/
/* Encrypt the plaintext message*/
if(CRYP_AES_CTR(MODE_ENCRYPT,IV_1,AES256key,256,Plaintext,AES_TEXT_SIZE,Encryptedtext) == SUCCESS)
{
/* Display encrypted Data*/
Display_EncryptedData(CTR, 256, AES_TEXT_SIZE);
}
/*=====================================================
Decryption in CTR mode
======================================================*/
PressToContinue();
/****************************************/
/* AES 128 **/
/****************************************/
/* Decrypt the plaintext message */
if(CRYP_AES_CTR(MODE_DECRYPT,IV_1,AES128key,128,Ciphertext,AES_TEXT_SIZE,Decryptedtext) == SUCCESS)
{
/* Display decrypted data*/
Display_DecryptedData(CTR, 128, AES_TEXT_SIZE);
}
/****************************************/
/* AES 192 **/
/****************************************/
/* Decrypt the plaintext message */
if(CRYP_AES_CTR(MODE_DECRYPT,IV_1,AES192key,192,Ciphertext,AES_TEXT_SIZE,Decryptedtext) == SUCCESS)
{
/* Display decrypted data*/
Display_DecryptedData(CTR, 192, AES_TEXT_SIZE);
}
/****************************************/
/* AES 256 **/
/****************************************/
/* Decrypt the plaintext message */
if(CRYP_AES_CTR(MODE_DECRYPT,IV_1,AES256key, 256,Ciphertext, AES_TEXT_SIZE,Decryptedtext) == SUCCESS)
{
/* Display decrypted data*/
Display_DecryptedData(CTR, 256, AES_TEXT_SIZE);
}
/******************************************************************************/
PressToContinue();
printf("\n\r Example restarted...\n ");
}
}