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The FIPS 140-2 Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms certified to FIPS 140-2 level 1. This jar contains the debug version JCE provider and low-level API for the BC-FJA version 1.0.2.3, FIPS Certificate #3514. Please note the debug jar is not certified.

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package org.bouncycastle.jcajce.provider;

import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.security.PrivateKey;

import javax.security.auth.Destroyable;

import org.bouncycastle.asn1.pkcs.PrivateKeyInfo;
import org.bouncycastle.crypto.asymmetric.AsymmetricXDHPrivateKey;
import org.bouncycastle.crypto.asymmetric.AsymmetricXDHPublicKey;
import org.bouncycastle.jcajce.interfaces.XDHPrivateKey;
import org.bouncycastle.jcajce.interfaces.XDHPublicKey;
import org.bouncycastle.util.Arrays;

class ProvXDHPrivateKey
    implements Destroyable, XDHPrivateKey
{
    static final long serialVersionUID = 1L;

    private transient AsymmetricXDHPrivateKey baseKey;

    ProvXDHPrivateKey(AsymmetricXDHPrivateKey privKey)
    {
        this.baseKey = privKey;
    }

    ProvXDHPrivateKey(PrivateKeyInfo keyInfo)
        throws IOException
    {
        baseKey = new AsymmetricXDHPrivateKey(keyInfo);
    }

    public String getAlgorithm()
    {
        return getBaseKey().getAlgorithm().getName();
    }

    public String getFormat()
    {
        KeyUtil.checkDestroyed(this);
        
        return "PKCS#8";
    }

    public byte[] getPublicData()
    {
        return getBaseKey().getPublicData();
    }
    
    public byte[] getEncoded()
    {
        return getBaseKey().getEncoded();
    }

    public void destroy()
    {
        baseKey.destroy();
    }

    public boolean isDestroyed()
    {
        return baseKey.isDestroyed();
    }
    
    public AsymmetricXDHPrivateKey getBaseKey()
    {
        KeyUtil.checkDestroyed(this);

        return baseKey;
    }

    public XDHPublicKey getPublicKey()
    {
        return new ProvXDHPublicKey(new AsymmetricXDHPublicKey(baseKey.getAlgorithm(), baseKey.getPublicData()));
    }

    public String toString()
    {
        if (isDestroyed())
        {
             return KeyUtil.destroyedPrivateKeyToString("XDH");
        }

        AsymmetricXDHPublicKey pubKey = new AsymmetricXDHPublicKey(baseKey.getAlgorithm(), baseKey.getPublicData());

        return KeyUtil.keyToString("Private Key", getAlgorithm(), pubKey);
    }

    public boolean equals(Object o)
    {
        if (o == this)
        {
            return true;
        }

        if (o instanceof ProvXDHPrivateKey)
        {
            return this.baseKey.equals(((ProvXDHPrivateKey)o).baseKey);
        }

        return false;
    }

    public int hashCode()
    {
        return baseKey.hashCode();
    }

    private void readObject(
        ObjectInputStream in)
        throws IOException, ClassNotFoundException
    {
        in.defaultReadObject();

        byte[] enc = (byte[])in.readObject();

        baseKey = new AsymmetricXDHPrivateKey(enc);
    }

    private void writeObject(
        ObjectOutputStream out)
        throws IOException
    {
        if (isDestroyed())
        {
            throw new IOException("key has been destroyed");
        }

        out.defaultWriteObject();

        out.writeObject(this.getEncoded());
    }
}