//*****************************************************************************
//
//! AES Crypt Function
//!
//! This function Configures Key,Mode and carries out Encryption/Decryption in
//! CPU mode
//! \param uiConfig - Configuration Value
//! \param uiKeySize - KeySize used.(128,192 or 256 bit)
//! \param puiKey1 - Key Used
//! \param puiData - Input Data
//! \param puiResult - Resultant Output Data
//! \param uiDataLength - Input Data Length
//! \param uiIV - Initialization Vector used
//!
//! \return none
//
//*****************************************************************************
void
AESCrypt(unsigned int uiConfig,unsigned int uiKeySize,unsigned int *puiKey1,
unsigned int *puiData,unsigned int *puiResult,
unsigned int uiDataLength,unsigned int *uiIV)
{
//
// Step1: Enable Interrupts
// Step2: Wait for Context Ready Inteerupt
// Step3: Set the Configuration Parameters (Direction,AES Mode and Key Size)
// Step4: Set the Initialization Vector
// Step5: Write Key
// Step6: Start the Crypt Process
//
//
// Clear the flags.
//
g_bContextInIntFlag = false;
g_bDataInIntFlag = false;
g_bContextOutIntFlag = false;
g_bDataOutIntFlag = false;
//
// Enable all interrupts.
//
MAP_AESIntEnable(AES_BASE, AES_INT_CONTEXT_IN |
AES_INT_CONTEXT_OUT | AES_INT_DATA_IN |
AES_INT_DATA_OUT);
//
// Wait for the context in flag, the flag will be set in the Interrupt handler.
//
while(!g_bContextInIntFlag)
{
}
//
// Configure the AES module with direction (encryption or decryption) and
// the key size.
//
MAP_AESConfigSet(AES_BASE, uiConfig |uiKeySize);
//
// Write the initial value registers if needed, depends on the mode.
//
if(((uiConfig & AES_CFG_MODE_M) == AES_CFG_MODE_CBC) ||
((uiConfig & AES_CFG_MODE_M) == AES_CFG_MODE_CFB) ||
((uiConfig & AES_CFG_MODE_M) == AES_CFG_MODE_CTR) ||
((uiConfig & AES_CFG_MODE_M) == AES_CFG_MODE_ICM)
)
{
MAP_AESIVSet(AES_BASE, (unsigned char *)uiIV);
}
//
// Write key1.
//
MAP_AESKey1Set(AES_BASE,(unsigned char *)puiKey1,uiKeySize);
//
// Start Crypt Process
//
MAP_AESDataProcess(AES_BASE, (unsigned char *)puiData,
(unsigned char *)puiResult, uiDataLength);
}
//*****************************************************************************
//
//! AES Crypt Function
//!
//! This function Configures Key,Mode and carries out Encryption/Decryption in
//! CPU mode
//! \param uiConfig - Configuration Value
//! \param uiKeySize - KeySize used.(128,192 or 256 bit)
//! \param puiKey1 - Key Used
//! \param puiData - Input Data
//! \param puiResult - Resultant Output Data
//! \param uiDataLength - Input Data Length
//! \param uiIV - Initialization Vector used
//!
//! \return none
//
//*****************************************************************************
void
AESCrypt(unsigned int uiConfig,unsigned int uiKeySize,unsigned int *puiKey1,unsigned int *puiData,
unsigned int *puiResult,unsigned int uiDataLength,unsigned int *uiIV)
{
//
// Step1: Reset the Module
// Step2: Enable Interrupts
// Step3: Wait for Context Ready Inteerupt
// Step4: Set the Configuration Parameters (Direction,AES Mode and Key Size)
// Step5: Set the Initialization Vector
// Step6: Write Key
// Step7: Start the Crypt Process
//
MAP_PRCMPeripheralReset(PRCM_DTHE);
//
// Clear the flags.
//
g_bContextInIntFlag = false;
g_bDataInIntFlag = false;
g_bContextOutIntFlag = false;
g_bDataOutIntFlag = false;
//
// Enable all interrupts.
//
MAP_AESIntEnable(AES_BASE, AES_INT_CONTEXT_IN |
AES_INT_CONTEXT_OUT | AES_INT_DATA_IN |
AES_INT_DATA_OUT);
//
// Wait for the context in flag, the flag will be set in the Interrupt handler.
//
while(!g_bContextInIntFlag)
{
}
//
// Configure the AES module with direction (encryption or decryption) and the key size.
//
MAP_AESConfigSet(AES_BASE, uiConfig | uiKeySize);
//
// Write the initial value registers if needed, depends on the mode.
//
if(((uiConfig & AES_CFG_MODE_M) == AES_CFG_MODE_CBC) ||
((uiConfig & AES_CFG_MODE_M) == AES_CFG_MODE_CFB) ||
((uiConfig & AES_CFG_MODE_M) == AES_CFG_MODE_CTR) ||
((uiConfig & AES_CFG_MODE_M) == AES_CFG_MODE_ICM)
)
{
MAP_AESIVSet(AES_BASE, (unsigned char *)uiIV);
}
//
// Write key1.
//
//char key[] = "no-preshared-key";
MAP_AESKey1Set(AES_BASE,(unsigned char *)puiKey1, uiKeySize);
//
// Start Crypt Process
//
//if (uiConfig == 4)
//{
// unsigned char puiBuff[100] = {0x3A, 0xC1, 0xFE, 0x31, 0x71, 0x16, 0x09, 0x6C, 0x61, 0xF8, 0x91, 0xA1, 0x7A, 0xCA, 0xA2, 0x8F, 0xCC, 0xE2, 0x2A, 0x71, 0x20, 0x0C, 0x6E, 0xB9, 0x58, 0x82, 0xB5, 0xA1, 0x8E, 0xEC, 0xDC, 0xB5, 0x0E, 0x4F, 0x6C, 0x6A, 0x6A, 0xD4, 0x52, 0xFF, 0x86, 0xFA, 0x2B, 0xAD, 0x11, 0x4B, 0xA7, 0x41, 0x2F, 0x1B, 0xFB, 0x97, 0xB0, 0x1E, 0x06, 0x35, 0xA9, 0x07, 0x3C, 0x9B, 0xBE, 0xA1, 0x4E, 0x58};
//MQTT_payload_string(puiBuff);
//}
//else
//{
// unsigned char puiBuff[100] = {0x88, 0xEC, 0x18, 0x67, 0x4A, 0x63, 0x62, 0x84, 0xE6, 0xBF, 0xAF, 0xC9, 0x56, 0x77, 0x8C, 0xE8, 0xCC, 0xE2, 0x2A, 0x71, 0x20, 0x0C, 0x6E, 0xB9, 0x58, 0x82, 0xB5, 0xA1, 0x8E, 0xEC, 0xDC, 0xB5, 0x0E, 0x4F, 0x6C, 0x6A, 0x6A, 0xD4, 0x52, 0xFF, 0x86, 0xFA, 0x2B, 0xAD, 0x11, 0x4B, 0xA7, 0x41, 0xA4, 0x02, 0xB7, 0x8D, 0x75, 0x6A, 0x96, 0x8F, 0xA9, 0xC4, 0x9F, 0xAD, 0x6F, 0xE9, 0x6A, 0x25};
//}
// unsigned char resBuff[100];
MAP_AESDataProcess(AES_BASE, (unsigned char *)puiData, (unsigned char *)puiResult, uiDataLength);
}