using System;

namespace Org.BouncyCastle.Bcpg;

public class ModDetectionCodePacket : ContainedPacket
{
	private readonly byte[] digest;

	internal ModDetectionCodePacket(BcpgInputStream bcpgIn)
	{
		if (bcpgIn == null)
		{
			throw new ArgumentNullException("bcpgIn");
		}
		digest = new byte[20];
		bcpgIn.ReadFully(digest);
	}

	public ModDetectionCodePacket(byte[] digest)
	{
		if (digest == null)
		{
			throw new ArgumentNullException("digest");
		}
		this.digest = (byte[])digest.Clone();
	}

	public byte[] GetDigest()
	{
		return (byte[])digest.Clone();
	}

	public override void Encode(BcpgOutputStream bcpgOut)
	{
		bcpgOut.WritePacket(PacketTag.ModificationDetectionCode, digest, oldFormat: false);
	}
}