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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 LTS provider but may also be used with other providers providing cryptographic services.

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package org.bouncycastle.openpgp.operator.bc;

import java.util.Date;

import org.bouncycastle.bcpg.PublicKeyPacket;
import org.bouncycastle.crypto.AsymmetricCipherKeyPair;
import org.bouncycastle.crypto.params.AsymmetricKeyParameter;
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;

public class BcPGPKeyPair
    extends PGPKeyPair
{
    @Deprecated
    private static PGPPublicKey getPublicKey(int algorithm, PGPAlgorithmParameters parameters, AsymmetricKeyParameter pubKey, Date date)
        throws PGPException
    {
        return getPublicKey(PublicKeyPacket.VERSION_4, algorithm, parameters, pubKey, date);
    }

    private static PGPPublicKey getPublicKey(int version, int algorithm, PGPAlgorithmParameters parameters, AsymmetricKeyParameter pubKey, Date date)
        throws PGPException
    {
        return new BcPGPKeyConverter().getPGPPublicKey(version, algorithm, parameters, pubKey, date);
    }

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

    @Deprecated
    public BcPGPKeyPair(int algorithm, AsymmetricCipherKeyPair keyPair, Date date)
        throws PGPException
    {
        this(PublicKeyPacket.VERSION_4, algorithm, keyPair, date);
    }

    public BcPGPKeyPair(int version, int algorithm, AsymmetricCipherKeyPair keyPair, Date date)
        throws PGPException
    {
        this.pub = getPublicKey(version, algorithm, null, keyPair.getPublic(), date);
        this.priv = getPrivateKey(this.pub, keyPair.getPrivate());
    }

    @Deprecated
    public BcPGPKeyPair(int algorithm, PGPAlgorithmParameters parameters, AsymmetricCipherKeyPair keyPair, Date date)
        throws PGPException
    {
        this(PublicKeyPacket.VERSION_4, algorithm, parameters, keyPair, date);
    }

    public BcPGPKeyPair(int version, int algorithm, PGPAlgorithmParameters parameters, AsymmetricCipherKeyPair keyPair, Date date)
        throws PGPException
    {
        this.pub = getPublicKey(version, algorithm, parameters, keyPair.getPublic(), date);
        this.priv = getPrivateKey(this.pub, keyPair.getPrivate());
    }
}