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

/**
 * Signature Subpacket containing the number of seconds after the signatures creation
 * time after which the signature expires.
 *
 * @see 
 *     RFC4880 - Signature Expiration Time
 * @see 
 *     RFC9580 - Signature Expiration Time
 */
public class SignatureExpirationTime 
    extends SignatureSubpacket
{
    /**
     * @deprecated Will be removed
     */
    protected static byte[] timeToBytes(
        long    t)
    {
        return Utils.timeToBytes(t);
    }

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

    public SignatureExpirationTime(
        boolean    critical,
        long       seconds)
    {
        super(SignatureSubpacketTags.EXPIRE_TIME, critical, false, Utils.timeToBytes(seconds));
    }

    /**
     * return time in seconds before signature expires after creation time.
     */
    public long getTime()
    {
        return Utils.timeFromBytes(data);
    }
}