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The Bouncy Castle Java API for handling the OpenPGP protocol. This jar contains the OpenPGP API for JDK 1.8 and up. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs.

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package org.bouncycastle.bcpg.sig;

import java.util.Date;

import org.bouncycastle.bcpg.SignatureSubpacket;
import org.bouncycastle.bcpg.SignatureSubpacketTags;

/**
 * Signature Subpacket containing the time at which the signature was created.
 *
 * @see 
 *     RFC4880 - Signature Creation Time
 * @see 
 *     RFC9580 - Signature Creation Time
 */
public class SignatureCreationTime 
    extends SignatureSubpacket
{
    /**
     * @deprecated Will be removed
     */
    protected static byte[] timeToBytes(
        Date    date)
    {
        long t = date.getTime() / 1000;
        return Utils.timeToBytes(t);
    }

    public SignatureCreationTime(
        boolean    critical,
        boolean    isLongLength,
        byte[]     data)
    {
        super(SignatureSubpacketTags.CREATION_TIME, critical, isLongLength, data);
    }

    public SignatureCreationTime(
        boolean    critical,
        Date       date)
    {
        super(SignatureSubpacketTags.CREATION_TIME, critical, false, timeToBytes(date));
    }

    public SignatureCreationTime(
            Date date)
    {
        this(true, date);
    }

    public Date getTime()
    {
        long time = Utils.timeFromBytes(data);
        return new Date(time * 1000);
    }
}