package org.bouncycastle.bcpg.sig;

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

/**
 * packet giving signature creation time.
 */
public class IssuerKeyID 
	extends SignatureSubpacket
{
	protected static byte[] keyIDToBytes(
		long	keyId)
	{
		byte[]	data = new byte[8];
		
		data[0] = (byte)(keyId >> 56);
		data[1] = (byte)(keyId >> 48);
		data[2] = (byte)(keyId >> 40);
		data[3] = (byte)(keyId >> 32);
		data[4] = (byte)(keyId >> 24);
		data[5] = (byte)(keyId >> 16);
		data[6] = (byte)(keyId >> 8);
		data[7] = (byte)keyId;
		
		return data;
	}
	
	public IssuerKeyID(
		boolean	critical,
		byte[]		data)
	{
		super(SignatureSubpacketTags.ISSUER_KEY_ID, critical, data);
	}
	
	public IssuerKeyID(
		boolean	critical,
		long			keyID)
	{
		super(SignatureSubpacketTags.ISSUER_KEY_ID, critical, keyIDToBytes(keyID));
	}
	
	public long getKeyID()
	{
		long	keyID = ((long)(data[0] & 0xff) << 56) | ((long)(data[1] & 0xff) << 48) | ((long)(data[2] & 0xff) << 40) | ((long)(data[3] & 0xff) << 32)
								| ((long)(data[4] & 0xff) << 24) | ((data[5] & 0xff) << 16) | ((data[6] & 0xff) << 8) | (data[7] & 0xff);
		
		return keyID;
	}
}
