init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Bcpg/ModDetectionCodePacket.cs

@@ -0,0 +1,37 @@
+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);
+	}
+}