FST Serialize BouncyCastle Keypair

gistfile1.java

import java.math.BigInteger;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.SecureRandom;
import java.security.Security;
import java.security.spec.RSAKeyGenParameterSpec;

import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.nustaq.serialization.FSTConfiguration;

public class TestSerializeKeyFST {

	// Fermat F4, largest known fermat prime
	private static final BigInteger PUBLIC_EXP = new BigInteger("10001", 16);;
	private static final int STRENGTH = 1024;

	public static void main(String[] args) throws Exception {
		// install BouncyCastle provider
		Security.addProvider(new BouncyCastleProvider());

		// generate a keypair
		KeyPairGenerator gen = KeyPairGenerator.getInstance("RSA", "BC");
		RSAKeyGenParameterSpec params = new RSAKeyGenParameterSpec(STRENGTH, PUBLIC_EXP);
		gen.initialize(params, new SecureRandom());
		KeyPair keyPair = gen.generateKeyPair();

		FSTConfiguration fst = FSTConfiguration.createDefaultConfiguration();

		// serialize
		byte[] serialized = fst.asByteArray(keyPair);

		// deserialize --> crash
		KeyPair deserialized = (KeyPair) fst.asObject(serialized);
	}
}

Also they made OptionalDataException private, so I can't throw it from my code ... WTF