1 files changed, 47 insertions, 0 deletions
diff --git a/crypto/src/tls/CertificateCompressionAlgorithm.cs b/crypto/src/tls/CertificateCompressionAlgorithm.cs
new file mode 100644
index 000000000..4b6ebdadc
--- /dev/null
+++ b/crypto/src/tls/CertificateCompressionAlgorithm.cs
@@ -0,0 +1,47 @@
+using System;
+
+namespace Org.BouncyCastle.Tls
+{
+    /**
+     * RFC 8879
+     */
+    public abstract class CertificateCompressionAlgorithm
+    {
+        public const int zlib = 1;
+        public const int brotli = 2;
+        public const int zstd = 3;
+
+        public static string GetName(int certificateCompressionAlgorithm)
+        {
+            switch (certificateCompressionAlgorithm)
+            {
+            case zlib:
+                return "zlib";
+            case brotli:
+                return "brotli";
+            case zstd:
+                return "zstd";
+            default:
+                return "UNKNOWN";
+            }
+        }
+
+        public static string GetText(int certificateCompressionAlgorithm)
+        {
+            return GetName(certificateCompressionAlgorithm) + "(" + certificateCompressionAlgorithm + ")";
+        }
+
+        public static bool IsRecognized(int certificateCompressionAlgorithm)
+        {
+            switch (certificateCompressionAlgorithm)
+            {
+            case zlib:
+            case brotli:
+            case zstd:
+                return true;
+            default:
+                return false;
+            }
+        }
+    }
+}