1 files changed, 49 insertions, 0 deletions
diff --git a/src/DotNetOpenAuth.ApplicationBlock/InMemoryClientAuthorizationTracker.cs b/src/DotNetOpenAuth.ApplicationBlock/InMemoryClientAuthorizationTracker.cs
new file mode 100644
index 0000000..0dad973
--- /dev/null
+++ b/src/DotNetOpenAuth.ApplicationBlock/InMemoryClientAuthorizationTracker.cs
@@ -0,0 +1,49 @@
+//-----------------------------------------------------------------------
+// <copyright file="InMemoryClientAuthorizationTracker.cs" company="Outercurve Foundation">
+//     Copyright (c) Outercurve Foundation. All rights reserved.
+// </copyright>
+//-----------------------------------------------------------------------
+
+namespace DotNetOpenAuth.ApplicationBlock {
+	using System;
+	using System.Collections.Generic;
+	using System.Globalization;
+	using System.Linq;
+	using System.ServiceModel;
+	using System.Text;
+	using System.Threading;
+	using DotNetOpenAuth.Messaging;
+	using DotNetOpenAuth.OAuth2;
+
+	internal class InMemoryClientAuthorizationTracker : IClientAuthorizationTracker {
+		private readonly Dictionary<int, IAuthorizationState> savedStates = new Dictionary<int, IAuthorizationState>();
+		private int stateCounter;
+
+		#region Implementation of IClientTokenManager
+
+		/// <summary>
+		/// Gets the state of the authorization for a given callback URL and client state.
+		/// </summary>
+		/// <param name="callbackUrl">The callback URL.</param>
+		/// <param name="clientState">State of the client stored at the beginning of an authorization request.</param>
+		/// <returns>The authorization state; may be <c>null</c> if no authorization state matches.</returns>
+		public IAuthorizationState GetAuthorizationState(Uri callbackUrl, string clientState) {
+			IAuthorizationState state;
+			if (this.savedStates.TryGetValue(int.Parse(clientState), out state)) {
+				if (state.Callback != callbackUrl) {
+					throw new DotNetOpenAuth.Messaging.ProtocolException("Client state and callback URL do not match.");
+				}
+			}
+
+			return state;
+		}
+
+		#endregion
+
+		internal IAuthorizationState NewAuthorization(HashSet<string> scope, out string clientState) {
+			int counter = Interlocked.Increment(ref this.stateCounter);
+			clientState = counter.ToString(CultureInfo.InvariantCulture);
+			return this.savedStates[counter] = new AuthorizationState(scope);
+		}
+	}
+}