[AES] GPU cuda

__device__ void rotateLeft(byte *A){
	byte i;
    byte aux = A[0];
    for(i=0; i<3; i++){
    	A[i] = A[i+1];
    }
    A[3] = aux;
}

__global__ void key_expansion(byte *key, byte *expanded_key, byte *d_sbox, byte *d_rcon)}
	byte temp[4];
    byte c = 16;
    byte j, a, i = 0;
    for(j; j<16; j++){
    	expanded_key[j] = key[j];
    }
    if(c % 16 == 0){ //c가 16의 배수일 때
    	rotateLeft(temp);
        for(a; a<4; a++){
        	temp[a] = get_sbox(temp[a], d_sbox);
        }
        temp[0] = temp[0] ^ d_rcon[i];
        i++;
     }
     
     for(a; a<4; a++){
     	expanded_key[c] = expanded_key[c-16] ^ temp[a];
        c++;
     }
   }
}

__device__ void add_round_key(byte *state, int round, byte *expanded_key){
	int i,j;
    for(i = 0;i< 4; i++){
    	for(j = 0;j< 4; j++){
        	state[i*4+j] ^= expanded_key[round*16 +i*4 +j];
        }
    }
}

__device__ void subbytes(byte *state, byte *d_sbox){
	byte i,j;
    for(i=0; i<4; i++){
    	for(j=0; j<4; j++){
        	state[j*4+i] = get_sbox(state[j*4+i], d_sbox);
         }
    }
}