1 files changed, 70 insertions, 0 deletions
diff --git a/src/DotNetOpenAuth.OpenId.Provider/OpenId/Provider/OpenIdProviderUtilities.cs b/src/DotNetOpenAuth.OpenId.Provider/OpenId/Provider/OpenIdProviderUtilities.cs
new file mode 100644
index 0000000..cf525f1
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+++ b/src/DotNetOpenAuth.OpenId.Provider/OpenId/Provider/OpenIdProviderUtilities.cs
@@ -0,0 +1,70 @@
+//-----------------------------------------------------------------------
+// <copyright file="OpenIdProviderUtilities.cs" company="Andrew Arnott">
+//     Copyright (c) Andrew Arnott. All rights reserved.
+// </copyright>
+//-----------------------------------------------------------------------
+
+namespace DotNetOpenAuth.OpenId.Provider {
+	using System;
+	using System.Collections.Generic;
+	using System.Diagnostics.Contracts;
+	using System.Linq;
+	using System.Text;
+	using DotNetOpenAuth.Messaging;
+	using DotNetOpenAuth.OpenId.Messages;
+	using DotNetOpenAuth.OpenId.Provider;
+
+	/// <summary>
+	/// Utility methods for OpenID Providers.
+	/// </summary>
+	internal static class OpenIdProviderUtilities {
+		/// <summary>
+		/// Called to create the Association based on a request previously given by the Relying Party.
+		/// </summary>
+		/// <param name="request">The prior request for an association.</param>
+		/// <param name="response">The response.</param>
+		/// <param name="associationStore">The Provider's association store.</param>
+		/// <param name="securitySettings">The security settings for the Provider.  Should be <c>null</c> for Relying Parties.</param>
+		/// <returns>
+		/// The created association.
+		/// </returns>
+		/// <remarks>
+		/// The response message is updated to include the details of the created association by this method.
+		/// This method is called by both the Provider and the Relying Party, but actually performs
+		/// quite different operations in either scenario.
+		/// </remarks>
+		internal static Association CreateAssociation(AssociateRequest request, IAssociateSuccessfulResponseProvider response, IProviderAssociationStore associationStore, ProviderSecuritySettings securitySettings) {
+			Requires.NotNull(request, "request");
+			Requires.NotNull(response, "response");
+			Requires.NotNull(securitySettings, "securitySettings");
+
+			// We need to initialize some common properties based on the created association.
+			var association = response.CreateAssociationAtProvider(request, associationStore, securitySettings);
+			response.ExpiresIn = association.SecondsTillExpiration;
+			response.AssociationHandle = association.Handle;
+
+			return association;
+		}
+
+		/// <summary>
+		/// Determines whether the association with the specified handle is (still) valid.
+		/// </summary>
+		/// <param name="associationStore">The association store.</param>
+		/// <param name="containingMessage">The OpenID message that referenced this association handle.</param>
+		/// <param name="isPrivateAssociation">A value indicating whether a private association is expected.</param>
+		/// <param name="handle">The association handle.</param>
+		/// <returns>
+		///   <c>true</c> if the specified containing message is valid; otherwise, <c>false</c>.
+		/// </returns>
+		internal static bool IsValid(this IProviderAssociationStore associationStore, IProtocolMessage containingMessage, bool isPrivateAssociation, string handle) {
+			Requires.NotNull(associationStore, "associationStore");
+			Requires.NotNull(containingMessage, "containingMessage");
+			Requires.NotNullOrEmpty(handle, "handle");
+			try {
+				return associationStore.Deserialize(containingMessage, isPrivateAssociation, handle) != null;
+			} catch (ProtocolException) {
+				return false;
+			}
+		}
+	}
+}