1 files changed, 122 insertions, 0 deletions
diff --git a/src/DotNetOpenAuth.OAuth2.AuthorizationServer/OAuth2/ChannelElements/TokenCodeSerializationBindingElement.cs b/src/DotNetOpenAuth.OAuth2.AuthorizationServer/OAuth2/ChannelElements/TokenCodeSerializationBindingElement.cs
new file mode 100644
index 0000000..41bc609
--- /dev/null
+++ b/src/DotNetOpenAuth.OAuth2.AuthorizationServer/OAuth2/ChannelElements/TokenCodeSerializationBindingElement.cs
@@ -0,0 +1,122 @@
+//-----------------------------------------------------------------------
+// <copyright file="TokenCodeSerializationBindingElement.cs" company="Outercurve Foundation">
+//     Copyright (c) Outercurve Foundation. All rights reserved.
+// </copyright>
+//-----------------------------------------------------------------------
+
+namespace DotNetOpenAuth.OAuth2.ChannelElements {
+	using System;
+	using System.Collections.Generic;
+	using System.Diagnostics.CodeAnalysis;
+	using System.Globalization;
+	using System.Linq;
+	using System.Security.Cryptography;
+	using System.Text;
+	using DotNetOpenAuth.Messaging;
+	using DotNetOpenAuth.Messaging.Bindings;
+	using DotNetOpenAuth.OAuth2.AuthServer.ChannelElements;
+	using DotNetOpenAuth.OAuth2.Messages;
+
+	/// <summary>
+	/// Serializes and deserializes authorization codes, refresh tokens and access tokens
+	/// on incoming and outgoing messages.
+	/// </summary>
+	internal class TokenCodeSerializationBindingElement : AuthServerBindingElementBase {
+		/// <summary>
+		/// Gets the protection commonly offered (if any) by this binding element.
+		/// </summary>
+		/// <value></value>
+		/// <remarks>
+		/// This value is used to assist in sorting binding elements in the channel stack.
+		/// </remarks>
+		public override MessageProtections Protection {
+			get { return MessageProtections.None; }
+		}
+
+		/// <summary>
+		/// Prepares a message for sending based on the rules of this channel binding element.
+		/// </summary>
+		/// <param name="message">The message to prepare for sending.</param>
+		/// <returns>
+		/// The protections (if any) that this binding element applied to the message.
+		/// Null if this binding element did not even apply to this binding element.
+		/// </returns>
+		/// <remarks>
+		/// Implementations that provide message protection must honor the
+		/// <see cref="MessagePartAttribute.RequiredProtection"/> properties where applicable.
+		/// </remarks>
+		public override MessageProtections? ProcessOutgoingMessage(IProtocolMessage message) {
+			var directResponse = message as IDirectResponseProtocolMessage;
+			var request = directResponse != null ? directResponse.OriginatingRequest as IAccessTokenRequestInternal : null;
+
+			// Serialize the authorization code, if there is one.
+			var authCodeCarrier = message as IAuthorizationCodeCarryingRequest;
+			if (authCodeCarrier != null) {
+				var codeFormatter = AuthorizationCode.CreateFormatter(this.AuthorizationServer);
+				var code = authCodeCarrier.AuthorizationDescription;
+				authCodeCarrier.Code = codeFormatter.Serialize(code);
+				return MessageProtections.None;
+			}
+
+			// Serialize the refresh token, if applicable.
+			var refreshTokenResponse = message as AccessTokenSuccessResponse;
+			if (refreshTokenResponse != null && refreshTokenResponse.HasRefreshToken) {
+				var refreshTokenCarrier = (IAuthorizationCarryingRequest)message;
+				var refreshToken = new RefreshToken(refreshTokenCarrier.AuthorizationDescription);
+				var refreshTokenFormatter = RefreshToken.CreateFormatter(this.AuthorizationServer.CryptoKeyStore);
+				refreshTokenResponse.RefreshToken = refreshTokenFormatter.Serialize(refreshToken);
+			}
+
+			// Serialize the access token, if applicable.
+			var accessTokenResponse = message as IAccessTokenIssuingResponse;
+			if (accessTokenResponse != null && accessTokenResponse.AuthorizationDescription != null) {
+				ErrorUtilities.VerifyInternal(request != null, "We should always have a direct request message for this case.");
+				var accessTokenFormatter = AccessToken.CreateFormatter(
+					request.AccessTokenCreationParameters.AccessTokenSigningKey,
+					request.AccessTokenCreationParameters.ResourceServerEncryptionKey);
+				accessTokenResponse.AccessToken = accessTokenFormatter.Serialize(accessTokenResponse.AuthorizationDescription);
+			}
+
+			return null;
+		}
+
+		/// <summary>
+		/// Performs any transformation on an incoming message that may be necessary and/or
+		/// validates an incoming message based on the rules of this channel binding element.
+		/// </summary>
+		/// <param name="message">The incoming message to process.</param>
+		/// <returns>
+		/// The protections (if any) that this binding element applied to the message.
+		/// Null if this binding element did not even apply to this binding element.
+		/// </returns>
+		/// <exception cref="ProtocolException">
+		/// Thrown when the binding element rules indicate that this message is invalid and should
+		/// NOT be processed.
+		/// </exception>
+		/// <remarks>
+		/// Implementations that provide message protection must honor the
+		/// <see cref="MessagePartAttribute.RequiredProtection"/> properties where applicable.
+		/// </remarks>
+		[SuppressMessage("Microsoft.Naming", "CA2204:Literals should be spelled correctly", MessageId = "unauthorizedclient", Justification = "Protocol requirement")]
+		[SuppressMessage("Microsoft.Naming", "CA2204:Literals should be spelled correctly", MessageId = "incorrectclientcredentials", Justification = "Protocol requirement")]
+		[SuppressMessage("Microsoft.Naming", "CA2204:Literals should be spelled correctly", MessageId = "authorizationexpired", Justification = "Protocol requirement")]
+		[SuppressMessage("Microsoft.Globalization", "CA1303:Do not pass literals as localized parameters", MessageId = "DotNetOpenAuth.Messaging.ErrorUtilities.VerifyProtocol(System.Boolean,System.String,System.Object[])", Justification = "Protocol requirement")]
+		public override MessageProtections? ProcessIncomingMessage(IProtocolMessage message) {
+			var authCodeCarrier = message as IAuthorizationCodeCarryingRequest;
+			if (authCodeCarrier != null) {
+				var authorizationCodeFormatter = AuthorizationCode.CreateFormatter(this.AuthorizationServer);
+				var authorizationCode = authorizationCodeFormatter.Deserialize(message, authCodeCarrier.Code, Protocol.code);
+				authCodeCarrier.AuthorizationDescription = authorizationCode;
+			}
+
+			var refreshTokenCarrier = message as IRefreshTokenCarryingRequest;
+			if (refreshTokenCarrier != null) {
+				var refreshTokenFormatter = RefreshToken.CreateFormatter(this.AuthorizationServer.CryptoKeyStore);
+				var refreshToken = refreshTokenFormatter.Deserialize(message, refreshTokenCarrier.RefreshToken, Protocol.refresh_token);
+				refreshTokenCarrier.AuthorizationDescription = refreshToken;
+			}
+
+			return null;
+		}
+	}
+}