1 files changed, 41 insertions, 0 deletions
diff --git a/src/DotNetOpenAuth.OAuth2/OAuth2/Crypto/JwtEncryptionAlgorithm.cs b/src/DotNetOpenAuth.OAuth2/OAuth2/Crypto/JwtEncryptionAlgorithm.cs
new file mode 100644
index 0000000..b3ac78b
--- /dev/null
+++ b/src/DotNetOpenAuth.OAuth2/OAuth2/Crypto/JwtEncryptionAlgorithm.cs
@@ -0,0 +1,41 @@
+//-----------------------------------------------------------------------
+// <copyright file="JwtEncryptionAlgorithm.cs" company="Andrew Arnott">
+//     Copyright (c) Andrew Arnott. All rights reserved.
+// </copyright>
+//-----------------------------------------------------------------------
+
+namespace DotNetOpenAuth.OAuth2.Crypto {
+	using System;
+	using System.Collections.Generic;
+	using System.Linq;
+	using System.Text;
+	using DotNetOpenAuth.Messaging;
+
+	internal abstract class JwtEncryptionAlgorithm : IDisposable {
+		protected JwtEncryptionAlgorithm(string algorithmName, string encryptionMethod) {
+			Requires.NotNullOrEmpty(algorithmName, "algorithmName");
+			Requires.NotNullOrEmpty(encryptionMethod, "encryptionMethod");
+			this.Header = new JweHeader(algorithmName, encryptionMethod);
+		}
+
+		internal JweHeader Header { get; private set; }
+
+		internal abstract void Encrypt(byte[] plainText, out byte[] cipherText, out byte[] integrityValue);
+
+		internal abstract byte[] Decrypt(byte[] cipherText, byte[] integrityValue);
+
+		public void Dispose() {
+			this.Dispose(true);
+			GC.SuppressFinalize(this);
+		}
+
+		protected virtual void Dispose(bool disposing) {
+		}
+
+		protected void KeyDerivation(byte[] contentMasterKey, out byte[] contentEncryptionKey, out byte[] contentIntegrityKey) {
+			// Implementing this would be manual, or involve P/Invoke I think.
+			// http://msdn.microsoft.com/en-us/library/windows/desktop/aa375393(v=vs.85).aspx
+			throw new NotImplementedException();
+		}
+	}
+}