1 files changed, 66 insertions, 0 deletions
diff --git a/crypto/src/tls/MacAlgorithm.cs b/crypto/src/tls/MacAlgorithm.cs
new file mode 100644
index 000000000..1706de1bd
--- /dev/null
+++ b/crypto/src/tls/MacAlgorithm.cs
@@ -0,0 +1,66 @@
+using System;
+
+namespace Org.BouncyCastle.Tls
+{
+    /// <summary>RFC 2246</summary>
+    /// <remarks>
+    /// Note that the values here are implementation-specific and arbitrary. It is recommended not to depend on the
+    /// particular values (e.g. serialization).
+    /// </remarks>
+    public abstract class MacAlgorithm
+    {
+        public const int cls_null = 0;
+        public const int md5 = 1;
+        public const int sha = 2;
+
+        /*
+         * RFC 5246
+         */
+        public const int hmac_md5 = md5;
+        public const int hmac_sha1 = sha;
+        public const int hmac_sha256 = 3;
+        public const int hmac_sha384 = 4;
+        public const int hmac_sha512 = 5;
+
+        public static string GetName(int macAlgorithm)
+        {
+            switch (macAlgorithm)
+            {
+            case cls_null:
+                return "null";
+            case hmac_md5:
+                return "hmac_md5";
+            case hmac_sha1:
+                return "hmac_sha1";
+            case hmac_sha256:
+                return "hmac_sha256";
+            case hmac_sha384:
+                return "hmac_sha384";
+            case hmac_sha512:
+                return "hmac_sha512";
+            default:
+                return "UNKNOWN";
+            }
+        }
+
+        public static string GetText(int macAlgorithm)
+        {
+            return GetName(macAlgorithm) + "(" + macAlgorithm + ")";
+        }
+
+        public static bool IsHmac(int macAlgorithm)
+        {
+            switch (macAlgorithm)
+            {
+            case hmac_md5:
+            case hmac_sha1:
+            case hmac_sha256:
+            case hmac_sha384:
+            case hmac_sha512:
+                return true;
+            default:
+                return false;
+            }
+        }
+    }
+}