Set options in Program.cs

(Of note, current .NET 6 won't do TLS 1.3 on macOS. Like, at all. See
dotnet/runtime#1979)

Minor other changes
fixed an error in ExtensionType enum

Program.cs

@@ -3,13 +3,27 @@
 using TlsPrinter;
 
 string url = "https://httpbin.org/post";
+url = "https://android.clients.google.com/auth";
 
 Uri uri = new(url);
 
 Socket tcpSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
 tcpSocket.Connect(uri.IdnHost, uri.Port);
 NetworkStream tcpStream = new(tcpSocket, true);
-SslClientAuthenticationOptions sslOptions = new() { TargetHost = uri.IdnHost };
+CipherSuitesPolicy ciphers = new CipherSuitesPolicy(new List<TlsCipherSuite>(){
+	TlsCipherSuite.TLS_AES_256_GCM_SHA384,
+	TlsCipherSuite.TLS_AES_128_GCM_SHA256,
+	TlsCipherSuite.TLS_CHACHA20_POLY1305_SHA256,
+	TlsCipherSuite.TLS_AES_128_CCM_SHA256,
+	TlsCipherSuite.TLS_AES_128_CCM_8_SHA256,
+});
+
+SslClientAuthenticationOptions sslOptions = new()
+{
+	TargetHost = uri.IdnHost,
+	//CipherSuitesPolicy = ciphers,
+	EnabledSslProtocols = System.Security.Authentication.SslProtocols.Tls13
+};
 TlsPrinterSettings tlsSettings = new(sslOptions);
 TlsPrinterStream tlsStream = new(tcpStream, tlsSettings);
 SslStream sslStream = new(tlsStream);

classes/TlsObjectModel/ClientHello.cs

@@ -89,6 +89,9 @@ public override void AddBytes(byte[] bytes)
 						Extension newExtension;
 						switch (extensionType)
 						{
+							//case ExtensionType.server_name:
+							//newExtension = new ServerNameExtension(extensionBytes);
+							//break;
 							default:
 								newExtension = new UnknownExtension(extensionBytes);
 								break;

classes/TlsObjectModel/ExtensionType.cs

@@ -2,8 +2,8 @@ namespace TlsObjectModel
 {
 	public enum ExtensionType : ushort
 	{
-		server_name = 1,
-		max_fragment_length = 2,
+		server_name = 0,
+		max_fragment_length = 1,
 		status_request = 5,
 		supported_groups = 10,
 		signature_algorithms = 13,

classes/TlsObjectModel/UnknownExtension.cs

@@ -2,7 +2,7 @@ namespace TlsObjectModel
 {
 	public class UnknownExtension : Extension
 	{
-		ushort ExtensionType;
+		ExtensionType ExtensionType;
 		byte[] ExtensionData = new byte[0];
 		public UnknownExtension(byte[] bytes)
 		{
@@ -29,7 +29,7 @@ public override void AddBytes(byte[] bytes)
 					case 1:
 						BackingBytes = BackingBytes.Append(bytes[0]).ToArray();
 						bytes = bytes.Remove(1);
-						ExtensionType = (ushort)TlsUtils.BytesToUInt64(BackingBytes[0..2]);
+						ExtensionType = (ExtensionType)TlsUtils.BytesToUInt64(BackingBytes[0..2]);
 						break;
 					case 2:
 						BackingBytes = BackingBytes.Append(bytes[0]).ToArray();