aes_ex2_encryptDecryptWithFirstRoundKey.c

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//******************************************************************************
//******************************************************************************
#include "driverlib.h"
 
uint8_t DataAESencrypted[16];       // Encrypted data
uint8_t DataAESdecrypted[16];   // Decrypted data
 
void main(void){
    uint8_t  Data[16] = {
    0x00, 0x11, 0x22, 0x33,
    0x44, 0x55, 0x66, 0x77,
    0x88, 0x99, 0xaa, 0xbb,
    0xcc, 0xdd, 0xee, 0xff
    };
 
    uint8_t CipherKey[16] = {
    0x00, 0x01, 0x02, 0x03,
    0x04, 0x05, 0x06, 0x07,
    0x08, 0x09, 0x0a, 0x0b,
    0x0c, 0x0d, 0x0e, 0x0f
    };
 
    // stop watchdog
    WDT_A_hold(WDT_A_BASE);
 
    // Load a cipher key to module
    AES_setCipherKey(AES_BASE, CipherKey );
 
    // Encrypt data with preloaded cipher key
    AES_encryptData(AES_BASE, Data, DataAESencrypted);
 
    // Reset module (not mandatory - just to delete all registers and keys)
    AES_reset(AES_BASE);
 
    // Load and generate decryption key for 1st decryption round - takes ~52 MCLK
    AES_setDecipherKey(AES_BASE, CipherKey);
 
    // Decrypt data by using pregenerated key - takes ~167 MCLK
    AES_decryptData(AES_BASE, DataAESencrypted, DataAESdecrypted);
 
    // Array DataunAES should now contain the same data as array Data
    while(1){};
}