package org.bouncycastle.crypto;public interface Wrapper{    public void init(boolean forWrapping, CipherParameters param);    /**     * Return the name of the algorithm the wrapper implements.     *     * @return the name of the algorithm the wrapper implements.     */    public String getAlgorithmName();    public byte[] wrap(byte[] in, int inOff, int inLen);    public byte[] unwrap(byte[] in, int inOff, int inLen)        throws InvalidCipherTextException;}