init commit

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

@@ -0,0 +1,76 @@
+using System;
+using System.IO;
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Crypto.Tls;
+
+public class ServerName
+{
+	protected readonly byte mNameType;
+
+	protected readonly object mName;
+
+	public virtual byte NameType => mNameType;
+
+	public virtual object Name => mName;
+
+	public ServerName(byte nameType, object name)
+	{
+		if (!IsCorrectType(nameType, name))
+		{
+			throw new ArgumentException("not an instance of the correct type", "name");
+		}
+		mNameType = nameType;
+		mName = name;
+	}
+
+	public virtual string GetHostName()
+	{
+		if (!IsCorrectType(0, mName))
+		{
+			throw new InvalidOperationException("'name' is not a HostName string");
+		}
+		return (string)mName;
+	}
+
+	public virtual void Encode(Stream output)
+	{
+		TlsUtilities.WriteUint8(mNameType, output);
+		if (mNameType == 0)
+		{
+			byte[] array = Strings.ToAsciiByteArray((string)mName);
+			if (array.Length < 1)
+			{
+				throw new TlsFatalAlert(80);
+			}
+			TlsUtilities.WriteOpaque16(array, output);
+			return;
+		}
+		throw new TlsFatalAlert(80);
+	}
+
+	public static ServerName Parse(Stream input)
+	{
+		byte b = TlsUtilities.ReadUint8(input);
+		if (b == 0)
+		{
+			byte[] array = TlsUtilities.ReadOpaque16(input);
+			if (array.Length < 1)
+			{
+				throw new TlsFatalAlert(50);
+			}
+			object name = Strings.FromAsciiByteArray(array);
+			return new ServerName(b, name);
+		}
+		throw new TlsFatalAlert(50);
+	}
+
+	protected static bool IsCorrectType(byte nameType, object name)
+	{
+		if (nameType == 0)
+		{
+			return name is string;
+		}
+		throw new ArgumentException("unsupported NameType", "nameType");
+	}
+}