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The Bouncy Castle Java APIs for the OpenPGP Protocol. The APIs are designed primarily to be used in conjunction with the BC FIPS provider. The APIs may also be used with other providers although if being used in a FIPS context it is the responsibility of the user to ensure that any other providers used are FIPS certified and used appropriately.

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package org.bouncycastle.openpgp.operator.jcajce;

import java.security.KeyPair;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.util.Date;

import org.bouncycastle.openpgp.PGPAlgorithmParameters;
import org.bouncycastle.openpgp.PGPException;
import org.bouncycastle.openpgp.PGPKeyPair;
import org.bouncycastle.openpgp.PGPPrivateKey;
import org.bouncycastle.openpgp.PGPPublicKey;

/**
 * A PGP key pair class that is constructed from JCA/JCE key pairs.
 */
public class JcaPGPKeyPair
    extends PGPKeyPair
{
    private static PGPPublicKey getPublicKey(int algorithm, PublicKey pubKey, Date date)
        throws PGPException
    {
        return  new JcaPGPKeyConverter().getPGPPublicKey(algorithm, pubKey, date);
    }

    private static PGPPublicKey getPublicKey(int algorithm, PGPAlgorithmParameters algorithmParameters, PublicKey pubKey, Date date)
        throws PGPException
    {
        return  new JcaPGPKeyConverter().getPGPPublicKey(algorithm, algorithmParameters, pubKey, date);
    }

    private static PGPPrivateKey getPrivateKey(PGPPublicKey pub, PrivateKey privKey)
        throws PGPException
    {
        return new JcaPGPKeyConverter().getPGPPrivateKey(pub, privKey);
    }

    /**
     * Construct PGP key pair from a JCA/JCE key pair.
     *
     * @param algorithm the PGP algorithm the key is for.
     * @param keyPair  the public/private key pair to convert.
     * @param date the creation date to associate with the key pair.
     * @throws PGPException if conversion fails.
     */
    public JcaPGPKeyPair(int algorithm, KeyPair keyPair, Date date)
        throws PGPException
    {
        this.pub = getPublicKey(algorithm, keyPair.getPublic(), date);
        this.priv = getPrivateKey(this.pub, keyPair.getPrivate());
    }

    /**
     * Construct PGP key pair from a JCA/JCE key pair.
     *
     * @param algorithm the PGP algorithm the key is for.
     * @param parameters additional parameters to be stored against the public key.
     * @param keyPair  the public/private key pair to convert.
     * @param date the creation date to associate with the key pair.
     * @throws PGPException if conversion fails.
     */
    public JcaPGPKeyPair(int algorithm, PGPAlgorithmParameters parameters, KeyPair keyPair, Date date)
        throws PGPException
    {
        this.pub = getPublicKey(algorithm, parameters, keyPair.getPublic(), date);
        this.priv = getPrivateKey(this.pub, keyPair.getPrivate());
    }
}