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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 1.4.

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package org.bouncycastle.crypto.engines;

/**
 * an implementation of the AES Key Wrapper from the NIST Key Wrap
 * Specification.
 * 
 * For further details see: http://csrc.nist.gov/encryption/kms/key-wrap.pdf.
 */
public class AESWrapEngine
    extends RFC3394WrapEngine
{
    /**
     * Create a regular AESWrapEngine specifying the encrypt for wrapping, decrypt for unwrapping.
     */
    public AESWrapEngine()
    {
        super(new AESEngine());
    }

    /**
     * Create an AESWrapEngine where the underlying cipher is set to decrypt for wrapping, encrypt for unwrapping.
     *
     * @param useReverseDirection true if underlying cipher should be used in decryption mode, false otherwise.
     */
    public AESWrapEngine(boolean useReverseDirection)
    {
        super(new AESEngine(), useReverseDirection);
    }
}