1 files changed, 35 insertions, 0 deletions
diff --git a/src/DotNetOpenAuth.Core/Messaging/Bindings/IReplayProtectedProtocolMessage.cs b/src/DotNetOpenAuth.Core/Messaging/Bindings/IReplayProtectedProtocolMessage.cs
new file mode 100644
index 0000000..1edf934
--- /dev/null
+++ b/src/DotNetOpenAuth.Core/Messaging/Bindings/IReplayProtectedProtocolMessage.cs
@@ -0,0 +1,35 @@
+//-----------------------------------------------------------------------
+// <copyright file="IReplayProtectedProtocolMessage.cs" company="Andrew Arnott">
+//     Copyright (c) Andrew Arnott. All rights reserved.
+// </copyright>
+//-----------------------------------------------------------------------
+
+namespace DotNetOpenAuth.Messaging.Bindings {
+	using System;
+	using DotNetOpenAuth.Messaging;
+
+	/// <summary>
+	/// The contract a message that has an allowable time window for processing must implement.
+	/// </summary>
+	/// <remarks>
+	/// All replay-protected messages must also be set to expire so the nonces do not have
+	/// to be stored indefinitely.
+	/// </remarks>
+	internal interface IReplayProtectedProtocolMessage : IExpiringProtocolMessage, IDirectedProtocolMessage {
+		/// <summary>
+		/// Gets the context within which the nonce must be unique.
+		/// </summary>
+		/// <value>
+		/// The value of this property must be a value assigned by the nonce consumer
+		/// to represent the entity that generated the nonce.  The value must never be
+		/// <c>null</c> but may be the empty string.
+		/// This value is treated as case-sensitive.
+		/// </value>
+		string NonceContext { get; }
+
+		/// <summary>
+		/// Gets or sets the nonce that will protect the message from replay attacks.
+		/// </summary>
+		string Nonce { get; set; }
+	}
+}