1 files changed, 117 insertions, 0 deletions
diff --git a/projecttemplates/WebFormsRelyingParty/Code/OAuthServiceProvider.cs b/projecttemplates/WebFormsRelyingParty/Code/OAuthServiceProvider.cs
new file mode 100644
index 0000000..473b6d2
--- /dev/null
+++ b/projecttemplates/WebFormsRelyingParty/Code/OAuthServiceProvider.cs
@@ -0,0 +1,117 @@
+//-----------------------------------------------------------------------
+// <copyright file="OAuthServiceProvider.cs" company="Andrew Arnott">
+//     Copyright (c) Andrew Arnott. All rights reserved.
+// </copyright>
+//-----------------------------------------------------------------------
+
+namespace WebFormsRelyingParty.Code {
+	using System;
+	using System.Collections.Generic;
+	using System.Linq;
+	using System.Web;
+	using DotNetOpenAuth.Messaging;
+	using DotNetOpenAuth.OAuth;
+	using DotNetOpenAuth.OAuth.ChannelElements;
+	using DotNetOpenAuth.OAuth.Messages;
+
+	public class OAuthServiceProvider {
+		private const string PendingAuthorizationRequestSessionKey = "PendingAuthorizationRequest";
+
+		/// <summary>
+		/// The shared service description for this web site.
+		/// </summary>
+		private static ServiceProviderDescription serviceDescription;
+
+		private static OAuthServiceProviderTokenManager tokenManager;
+
+		/// <summary>
+		/// The shared service provider object.
+		/// </summary>
+		private static ServiceProvider serviceProvider;
+
+		/// <summary>
+		/// The lock to synchronize initialization of the <see cref="serviceProvider"/> field.
+		/// </summary>
+		private static object initializerLock = new object();
+
+		/// <summary>
+		/// Gets the service provider.
+		/// </summary>
+		/// <value>The service provider.</value>
+		public static ServiceProvider ServiceProvider {
+			get {
+				EnsureInitialized();
+				return serviceProvider;
+			}
+		}
+
+		/// <summary>
+		/// Gets the service description.
+		/// </summary>
+		/// <value>The service description.</value>
+		public static ServiceProviderDescription ServiceDescription {
+			get {
+				EnsureInitialized();
+				return serviceDescription;
+			}
+		}
+
+		public static UserAuthorizationRequest PendingAuthorizationRequest {
+			get { return HttpContext.Current.Session[PendingAuthorizationRequestSessionKey] as UserAuthorizationRequest; }
+			set { HttpContext.Current.Session[PendingAuthorizationRequestSessionKey] = value; }
+		}
+
+		public static WebFormsRelyingParty.Consumer PendingAuthorizationConsumer {
+			get {
+				ITokenContainingMessage message = PendingAuthorizationRequest;
+				if (message == null) {
+					throw new InvalidOperationException();
+				}
+
+				return Global.DataContext.IssuedToken.OfType<IssuedRequestToken>().First(t => t.Token == message.Token).Consumer;
+			}
+		}
+
+		public static void AuthorizePendingRequestToken() {
+			var pendingRequest = PendingAuthorizationRequest;
+			if (pendingRequest == null) {
+				throw new InvalidOperationException("No pending authorization request to authorize.");
+			}
+
+			ITokenContainingMessage msg = pendingRequest;
+			var token = Global.DataContext.IssuedToken.OfType<IssuedRequestToken>().First(t => t.Token == msg.Token);
+			token.Authorize();
+
+			var response = serviceProvider.PrepareAuthorizationResponse(pendingRequest);
+			serviceProvider.Channel.Send(response);
+			PendingAuthorizationRequest = null;
+		}
+
+		/// <summary>
+		/// Initializes the <see cref="serviceProvider"/> field if it has not yet been initialized.
+		/// </summary>
+		private static void EnsureInitialized() {
+			if (serviceProvider == null) {
+				lock (initializerLock) {
+					if (serviceDescription == null) {
+						var endpoint = new MessageReceivingEndpoint(Utilities.ApplicationRoot + "OAuth.ashx", HttpDeliveryMethods.PostRequest);
+						serviceDescription = new ServiceProviderDescription {
+							TamperProtectionElements = new ITamperProtectionChannelBindingElement[] { new HmacSha1SigningBindingElement() },
+							RequestTokenEndpoint = endpoint,
+							AccessTokenEndpoint = endpoint,
+							UserAuthorizationEndpoint = endpoint,
+						};
+					}
+
+					if (tokenManager == null) {
+						tokenManager = new OAuthServiceProviderTokenManager();
+					}
+
+					if (serviceProvider == null) {
+						serviceProvider = new ServiceProvider(serviceDescription, tokenManager);
+					}
+				}
+			}
+		}
+	}
+}