Easy way to activate unlimited JCE in java

Since java 1.8.0_152, it has become very easy to activate JCE with unlimited strength. Simply uncomment the following line in /path/to/jdk/jre/lib/security/java.security:


Java: test JCE strength

To quickly test if JCE with unlimited strength is activated on your java installation, run this:

import javax.crypto.Cipher;

class JceTest {
  public static void main(String[] args) {
    try {
      int maxKeyLen = Cipher.getMaxAllowedKeyLength("AES");
      System.out.printf("maxKeyLen=%d%n", maxKeyLen);
      if(maxKeyLen == 2147483647) {
        System.out.println("JCE with unlimited strength activated.");
      } else {
        System.out.println("JCE with unlimited strength NOT activated!");
    } catch (Exception e){
      System.out.println("Sad world :(");