1 files changed, 13 insertions, 0 deletions
diff --git a/crypto/src/tls/SupplementalDataType.cs b/crypto/src/tls/SupplementalDataType.cs
new file mode 100644
index 000000000..d1eebfdc1
--- /dev/null
+++ b/crypto/src/tls/SupplementalDataType.cs
@@ -0,0 +1,13 @@
+using System;
+
+namespace Org.BouncyCastle.Tls
+{
+    /// <summary>RFC 4680</summary>
+    public abstract class SupplementalDataType
+    {
+        /*
+         * RFC 4681
+         */
+        public const int user_mapping_data = 0;
+    }
+}