AES encriptation

Question

Hi, first my english is bad.
I have this code for AES enc/dec
import java.security.*;
import javax.crypto.*;
import javax.crypto.spec.*;
import java.io.*;
* This program generates a AES key, retrieves its raw bytes, and
* then reinstantiates a AES key from the key bytes.
* The reinstantiated key is used to initialize a AES cipher for
* encryption and decryption.
public class AES {
String palabra;
byte[] par;
SecretKeySpec skeySpec;
//IvParameterSpec IvParameters;
public AES(String mesagge){
palabra="The Password";
par=palabra.getBytes();
skeySpec = new SecretKeySpec(par,"AES");
byte[] cc=encripta(mesagge);
String real=desencripta(cc);
* Turns array of bytes into string
* @param buf     Array of bytes to convert to hex string
* @return     Generated hex string
public static String asHex (byte buf[]) {
StringBuffer strbuf = new StringBuffer(buf.length * 2);
int i;
for (i = 0; i < buf.length; i++) {
if (((int) buf[i] & 0xff) < 0x10){
     strbuf.append("0");
strbuf.append(Long.toString((int) buf[i] & 0xff, 16));
return strbuf.toString();
public static void main(String[] args) throws Exception {
String message="This is just an example";
System.out.println(message);
AES aes=new AES(message);
public byte[] encripta(String mensage){
try{
Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
byte[] encrypted=cipher.doFinal(mensage.getBytes());
System.out.println("encrypted string: " + asHex(encrypted));
return encrypted;
}catch(Exception e){
e.printStackTrace();
return null;
public String desencripta(byte[] mensage){
try{
Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.DECRYPT_MODE, skeySpec);
byte[] original=cipher.doFinal(mensage);
String originalString = new String(original);
return originalString;
}catch(Exception e){
e.printStackTrace();
return "";
I have the following error
java.security.InvalidKeyException: Invalid AES key length: 96
at com.sun.crypto.provider.SunJCE_e.a(DashoA12275)
at com.sun.crypto.provider.SunJCE_i.a(DashoA12275)
at com.sun.crypto.provider.SunJCE_h.a(DashoA12275)
at com.sun.crypto.provider.SunJCE_h.a(DashoA12275)
at com.sun.crypto.provider.AESCipher.engineInit(DashoA12275)
at javax.crypto.Cipher.a(DashoA12275)
at javax.crypto.Cipher.a(DashoA12275)
at javax.crypto.Cipher.init(DashoA12275)
at javax.crypto.Cipher.init(DashoA12275)
at com.archicentro.scav.encriptador.AES.encripta(AES.java:77)
at com.archicentro.scav.encriptador.AES.<init>(AES.java:39)
at com.archicentro.scav.encriptador.AES.main(AES.java:69)
Can help me with this?

Answer 1

you should know the key length for AES.that's where the mistake is.