A quick test to see if you have the JCE Unlimited Strength Jurisdiction Policy files installed. If you don't, in Java 6 you'll see 128. If you do, you'll see 2147483647. Thanks to http://stackoverflow.com/questions/11538746/check-for-jce-unlimited-strength-jurisdiction-policy-files

compile.sh

#!/bin/bash

javac Test.java
java Test

Test.class

Test.java

import javax.crypto.Cipher;

class Test {
  public static void main(String[] args) {
    try {
      int maxKeyLen = Cipher.getMaxAllowedKeyLength("AES");
      if(maxKeyLen>128){
        System.out.println("unlimited");
      }else{
        System.out.println("limited");
      }
    } catch (Exception e){
      System.out.println("Sad world :(");
    }
  }
}