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Spongy Castle is a package-rename (org.bouncycastle.* to org.spongycastle.*) of Bouncy Castle intended for the Android platform. Android unfortunately ships with a stripped-down version of Bouncy Castle, which prevents easy upgrades - Spongy Castle overcomes this and provides a full, up-to-date version of the Bouncy Castle cryptographic libs.

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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;
    }
}