Checking if Unlimited Cryptography is available

How can I check, in Java code, if the current JVM have unlimited strength cryptography available?

In the same spirit as the answer of Dan Cruz, but with a single line of code and without going trough exceptions:

boolean limit = Cipher.getMaxAllowedKeyLength("RC5")<256;

So a complete program might be:

import javax.crypto.Cipher;

public class TestUCE {
  public static void main(String args[]) throws Exception {
    boolean unlimited =
      Cipher.getMaxAllowedKeyLength("RC5") >= 256;
    System.out.println("Unlimited cryptography enabled: " + unlimited);
  }
}

If you are on Linux and you have installed the JDK (but Beanshell is not available), you can check with the runscript command provided with the JDK.

jrunscript -e 'exit (javax.crypto.Cipher.getMaxAllowedKeyLength("RC5") >= 256 ? 0 : 1);'; echo $?

This returns a 0 status code if the Unlimited Cryptography is available, or 1 if not available. Zero is the correct 'success' return value for shell functions, and non-zero indicates a failure.