1 files changed, 98 insertions, 0 deletions
diff --git a/src/DotNetOpenAuth.OpenId/OpenId/ChannelElements/RelyingPartySecurityOptions.cs b/src/DotNetOpenAuth.OpenId/OpenId/ChannelElements/RelyingPartySecurityOptions.cs
new file mode 100644
index 0000000..d8fc103
--- /dev/null
+++ b/src/DotNetOpenAuth.OpenId/OpenId/ChannelElements/RelyingPartySecurityOptions.cs
@@ -0,0 +1,98 @@
+//-----------------------------------------------------------------------
+// <copyright file="RelyingPartySecurityOptions.cs" company="Andrew Arnott">
+//     Copyright (c) Andrew Arnott. All rights reserved.
+// </copyright>
+//-----------------------------------------------------------------------
+
+namespace DotNetOpenAuth.OpenId.ChannelElements {
+	using DotNetOpenAuth.Messaging;
+	using DotNetOpenAuth.OpenId.Messages;
+	using DotNetOpenAuth.OpenId.RelyingParty;
+
+	/// <summary>
+	/// Helps ensure compliance to some properties in the <see cref="RelyingPartySecuritySettings"/>.
+	/// </summary>
+	internal class RelyingPartySecurityOptions : IChannelBindingElement {
+		/// <summary>
+		/// The security settings that are active on the relying party.
+		/// </summary>
+		private RelyingPartySecuritySettings securitySettings;
+
+		/// <summary>
+		/// Initializes a new instance of the <see cref="RelyingPartySecurityOptions"/> class.
+		/// </summary>
+		/// <param name="securitySettings">The security settings.</param>
+		internal RelyingPartySecurityOptions(RelyingPartySecuritySettings securitySettings) {
+			this.securitySettings = securitySettings;
+		}
+
+		#region IChannelBindingElement Members
+
+		/// <summary>
+		/// Gets or sets the channel that this binding element belongs to.
+		/// </summary>
+		/// <remarks>
+		/// This property is set by the channel when it is first constructed.
+		/// </remarks>
+		public Channel Channel { get; set; }
+
+		/// <summary>
+		/// Gets the protection commonly offered (if any) by this binding element.
+		/// </summary>
+		/// <remarks>
+		/// This value is used to assist in sorting binding elements in the channel stack.
+		/// </remarks>
+		public 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 MessageProtections? ProcessOutgoingMessage(IProtocolMessage message) {
+			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>
+		public MessageProtections? ProcessIncomingMessage(IProtocolMessage message) {
+			var positiveAssertion = message as PositiveAssertionResponse;
+			if (positiveAssertion != null) {
+				ErrorUtilities.VerifyProtocol(
+					!this.securitySettings.RejectDelegatingIdentifiers ||
+					positiveAssertion.LocalIdentifier == positiveAssertion.ClaimedIdentifier,
+					OpenIdStrings.DelegatingIdentifiersNotAllowed);
+
+				return MessageProtections.None;
+			}
+
+			return null;
+		}
+
+		#endregion
+	}
+}