http://www.bouncycastle.org/java.html: The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5 to JDK 1.8.
  • The Legion of the Bouncy Castle Inc. 
package org.bouncycastle.jcajce.spec;

import java.security.spec.AlgorithmParameterSpec;

import org.bouncycastle.util.Arrays;

public class UserKeyingMaterialSpec
    implements AlgorithmParameterSpec
{
    private final byte[] userKeyingMaterial;

    public UserKeyingMaterialSpec(byte[] userKeyingMaterial)
    {
        this.userKeyingMaterial = Arrays.clone(userKeyingMaterial);
    }

    public byte[] getUserKeyingMaterial()
    {
        return Arrays.clone(userKeyingMaterial);
    }
}