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The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.5 and up. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs.

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package org.bouncycastle.crypto.params;

import org.bouncycastle.crypto.CipherParameters;
import org.bouncycastle.util.Arrays;

public class AEADParameters
    implements CipherParameters
{
    private byte[] associatedText;
    private byte[] nonce;
    private KeyParameter key;
    private int macSize;

    /**
     * Base constructor.
     *
     * @param key key to be used by underlying cipher
     * @param macSize macSize in bits
     * @param nonce nonce to be used
     */
   public AEADParameters(KeyParameter key, int macSize, byte[] nonce)
    {
       this(key, macSize, nonce, null);
    }

    /**
     * Base constructor.
     *
     * @param key key to be used by underlying cipher
     * @param macSize macSize in bits
     * @param nonce nonce to be used
     * @param associatedText initial associated text, if any
     */
    public AEADParameters(KeyParameter key, int macSize, byte[] nonce, byte[] associatedText)
    {
        this.key = key;
        this.nonce = Arrays.clone(nonce);
        this.macSize = macSize;
        this.associatedText = Arrays.clone(associatedText);
    }

    public KeyParameter getKey()
    {
        return key;
    }

    public int getMacSize()
    {
        return macSize;
    }

    public byte[] getAssociatedText()
    {
        return Arrays.clone(associatedText);
    }

    public byte[] getNonce()
    {
        return Arrays.clone(nonce);
    }
}