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The Long Term Stable (LTS) Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains the JCA/JCE provider and low-level API for the BC LTS version 2.73.7 for Java 8 and later.

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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;
}