1 files changed, 55 insertions, 0 deletions
diff --git a/src/OAuth/OAuthServiceProvider/Code/DatabaseNonceStore.cs b/src/OAuth/OAuthServiceProvider/Code/DatabaseNonceStore.cs
new file mode 100644
index 0000000..1f8f56e
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+++ b/src/OAuth/OAuthServiceProvider/Code/DatabaseNonceStore.cs
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+namespace OAuthServiceProvider.Code {
+	using System;
+	using System.Collections.Generic;
+	using System.Linq;
+	using System.Web;
+	using DotNetOpenAuth.Messaging.Bindings;
+
+	/// <summary>
+	/// A database-persisted nonce store.
+	/// </summary>
+	public class DatabaseNonceStore : INonceStore {
+		/// <summary>
+		/// Initializes a new instance of the <see cref="DatabaseNonceStore"/> class.
+		/// </summary>
+		public DatabaseNonceStore() {
+		}
+
+		#region INonceStore Members
+
+		/// <summary>
+		/// Stores a given nonce and timestamp.
+		/// </summary>
+		/// <param name="context">The context, or namespace, within which the
+		/// <paramref name="nonce"/> must be unique.
+		/// The context SHOULD be treated as case-sensitive.
+		/// The value will never be <c>null</c> but may be the empty string.</param>
+		/// <param name="nonce">A series of random characters.</param>
+		/// <param name="timestampUtc">The UTC timestamp that together with the nonce string make it unique
+		/// within the given <paramref name="context"/>.
+		/// The timestamp may also be used by the data store to clear out old nonces.</param>
+		/// <returns>
+		/// True if the context+nonce+timestamp (combination) was not previously in the database.
+		/// False if the nonce was stored previously with the same timestamp and context.
+		/// </returns>
+		/// <remarks>
+		/// The nonce must be stored for no less than the maximum time window a message may
+		/// be processed within before being discarded as an expired message.
+		/// This maximum message age can be looked up via the
+		/// <see cref="DotNetOpenAuth.Configuration.MessagingElement.MaximumMessageLifetime"/>
+		/// property, accessible via the <see cref="DotNetOpenAuth.Configuration.DotNetOpenAuthSection.Configuration"/>
+		/// property.
+		/// </remarks>
+		public bool StoreNonce(string context, string nonce, DateTime timestampUtc) {
+			Global.DataContext.Nonces.InsertOnSubmit(new Nonce { Context = context, Code = nonce, Timestamp = timestampUtc });
+			try {
+				Global.DataContext.SubmitChanges();
+				return true;
+			} catch (System.Data.Linq.DuplicateKeyException) {
+				return false;
+			}
+		}
+
+		#endregion
+	}
+}
+\ No newline at end of file