package org.bouncycastle.crypto;import java.security.SecureRandom;/** * The base class for symmetric, or secret, cipher key generators. */public class CipherKeyGenerator{    protected SecureRandom  random;    protected int           strength;    /**     * initialise the key generator.     *     * @param param the parameters to be used for key generation     */    public void init(        KeyGenerationParameters param)    {        this.random = param.getRandom();        this.strength = (param.getStrength() + 7) / 8;    }    /**     * generate a secret key.     *     * @return a byte array containing the key value.     */    public byte[] generateKey()    {        byte[]  key = new byte[strength];        random.nextBytes(key);        return key;    }}