A basic sanity test of the local AES key length.

CipherTest.java

import javax.crypto.Cipher;
class CipherTest {
    public static void main(String args[]) {
        try {
            int maxKeyLen = Cipher.getMaxAllowedKeyLength("AES");
            if(maxKeyLen < 256) {
                System.out.println("FAILED: Max key length too small! (" + maxKeyLen + ").");
            } else {
                System.out.println("PASSED: Max key length OK! (" + maxKeyLen + ").");
            }
        } catch(Exception e) {
            System.out.println("FAILED: No AES found!");
        }
    }
}