1 files changed, 56 insertions, 0 deletions
diff --git a/src/DotNetOpenAuth.OAuth2/OAuth2/ChannelElements/RefreshToken.cs b/src/DotNetOpenAuth.OAuth2/OAuth2/ChannelElements/RefreshToken.cs
new file mode 100644
index 0000000..ee41957
--- /dev/null
+++ b/src/DotNetOpenAuth.OAuth2/OAuth2/ChannelElements/RefreshToken.cs
@@ -0,0 +1,56 @@
+//-----------------------------------------------------------------------
+// <copyright file="RefreshToken.cs" company="Andrew Arnott">
+//     Copyright (c) Andrew Arnott. All rights reserved.
+// </copyright>
+//-----------------------------------------------------------------------
+
+namespace DotNetOpenAuth.OAuth2.ChannelElements {
+	using System;
+	using System.Diagnostics.Contracts;
+	using DotNetOpenAuth.Messaging;
+	using DotNetOpenAuth.Messaging.Bindings;
+
+	/// <summary>
+	/// The refresh token issued to a client by an authorization server that allows the client
+	/// to periodically obtain new short-lived access tokens.
+	/// </summary>
+	internal class RefreshToken : AuthorizationDataBag {
+		/// <summary>
+		/// The name of the bucket for symmetric keys used to sign refresh tokens.
+		/// </summary>
+		internal const string RefreshTokenKeyBucket = "https://localhost/dnoa/oauth_refresh_token";
+
+		/// <summary>
+		/// Initializes a new instance of the <see cref="RefreshToken"/> class.
+		/// </summary>
+		public RefreshToken() {
+		}
+
+		/// <summary>
+		/// Initializes a new instance of the <see cref="RefreshToken"/> class.
+		/// </summary>
+		/// <param name="authorization">The authorization this refresh token should describe.</param>
+		internal RefreshToken(IAuthorizationDescription authorization) {
+			Requires.NotNull(authorization, "authorization");
+
+			this.ClientIdentifier = authorization.ClientIdentifier;
+			this.UtcCreationDate = authorization.UtcIssued;
+			this.User = authorization.User;
+			this.Scope.ResetContents(authorization.Scope);
+		}
+
+		/// <summary>
+		/// Creates a formatter capable of serializing/deserializing a refresh token.
+		/// </summary>
+		/// <param name="cryptoKeyStore">The crypto key store.</param>
+		/// <returns>
+		/// A DataBag formatter.  Never null.
+		/// </returns>
+		internal static IDataBagFormatter<RefreshToken> CreateFormatter(ICryptoKeyStore cryptoKeyStore) {
+			Requires.NotNull(cryptoKeyStore, "cryptoKeyStore");
+			Contract.Ensures(Contract.Result<IDataBagFormatter<RefreshToken>>() != null);
+
+			return new UriStyleMessageFormatter<RefreshToken>(cryptoKeyStore, RefreshTokenKeyBucket, signed: true, encrypted: true);
+		}
+	}
+}