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Spongy Castle is a package-rename (org.bouncycastle.* to org.spongycastle.*) of Bouncy Castle intended for Android. Android ships with a stripped-down version of Bouncy Castle - this causes classloader collisions if you try to add an alternative (updated/complete) Bouncy Castle jar. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5.

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package org.spongycastle.crypto.params;

import org.spongycastle.crypto.DerivationParameters;

/**
 * parameters for Key derivation functions for IEEE P1363a
 */
public class KDFParameters
    implements DerivationParameters
{
    byte[]  iv;
    byte[]  shared;

    public KDFParameters(
        byte[]  shared,
        byte[]  iv)
    {
        this.shared = shared;
        this.iv = iv;
    }

    public byte[] getSharedSecret()
    {
        return shared;
    }

    public byte[] getIV()
    {
        return iv;
    }
}