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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.bcpg.sig;

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

/**
 * Signature Subpacket marking a User ID as primary.
 *
 * @see 
 *     RFC4880 - Primary User ID
 * @see 
 *     RFC9580 - Primary User ID
 */
public class PrimaryUserID 
    extends SignatureSubpacket
{
    public PrimaryUserID(
        boolean    critical,
        boolean    isLongLength,
        byte[]     data)
    {
        super(SignatureSubpacketTags.PRIMARY_USER_ID, critical, isLongLength, data);
    }
    
    public PrimaryUserID(
        boolean    critical,
        boolean    isPrimaryUserID)
    {
        super(SignatureSubpacketTags.PRIMARY_USER_ID, critical, false, Utils.booleanToByteArray(isPrimaryUserID));
    }
    
    public boolean isPrimaryUserID()
    {
        return Utils.booleanFromByteArray(data);
    }
}