init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Crypto/Tls/HeartbeatExtension.cs

@@ -0,0 +1,35 @@
+using System;
+using System.IO;
+
+namespace Org.BouncyCastle.Crypto.Tls;
+
+public class HeartbeatExtension
+{
+	protected readonly byte mMode;
+
+	public virtual byte Mode => mMode;
+
+	public HeartbeatExtension(byte mode)
+	{
+		if (!HeartbeatMode.IsValid(mode))
+		{
+			throw new ArgumentException("not a valid HeartbeatMode value", "mode");
+		}
+		mMode = mode;
+	}
+
+	public virtual void Encode(Stream output)
+	{
+		TlsUtilities.WriteUint8(mMode, output);
+	}
+
+	public static HeartbeatExtension Parse(Stream input)
+	{
+		byte b = TlsUtilities.ReadUint8(input);
+		if (!HeartbeatMode.IsValid(b))
+		{
+			throw new TlsFatalAlert(47);
+		}
+		return new HeartbeatExtension(b);
+	}
+}