1 files changed, 67 insertions, 0 deletions
diff --git a/src/DotNetOpenAuth.OpenId/OpenId/Messages/AssociateRequest.cs b/src/DotNetOpenAuth.OpenId/OpenId/Messages/AssociateRequest.cs
new file mode 100644
index 0000000..db0c39e
--- /dev/null
+++ b/src/DotNetOpenAuth.OpenId/OpenId/Messages/AssociateRequest.cs
@@ -0,0 +1,67 @@
+//-----------------------------------------------------------------------
+// <copyright file="AssociateRequest.cs" company="Andrew Arnott">
+//     Copyright (c) Andrew Arnott. All rights reserved.
+// </copyright>
+//-----------------------------------------------------------------------
+
+namespace DotNetOpenAuth.OpenId.Messages {
+	using System;
+	using System.Collections.Generic;
+	using System.Diagnostics;
+	using System.Diagnostics.Contracts;
+	using System.Linq;
+	using System.Text;
+	using DotNetOpenAuth.Messaging;
+
+	/// <summary>
+	/// An OpenID direct request from Relying Party to Provider to initiate an association.
+	/// </summary>
+	[DebuggerDisplay("OpenID {Version} {Mode} {AssociationType} {SessionType}")]
+	internal abstract class AssociateRequest : RequestBase {
+		/// <summary>
+		/// Initializes a new instance of the <see cref="AssociateRequest"/> class.
+		/// </summary>
+		/// <param name="version">The OpenID version this message must comply with.</param>
+		/// <param name="providerEndpoint">The OpenID Provider endpoint.</param>
+		protected AssociateRequest(Version version, Uri providerEndpoint)
+			: base(version, providerEndpoint, GetProtocolConstant(version, p => p.Args.Mode.associate), MessageTransport.Direct) {
+		}
+
+		/// <summary>
+		/// Gets or sets the preferred association type. The association type defines the algorithm to be used to sign subsequent messages. 
+		/// </summary>
+		/// <value>Value: A valid association type from Section 8.3.</value>
+		[MessagePart("openid.assoc_type", IsRequired = true, AllowEmpty = false)]
+		internal string AssociationType { get; set; }
+
+		/// <summary>
+		/// Gets or sets the preferred association session type. This defines the method used to encrypt the association's MAC key in transit. 
+		/// </summary>
+		/// <value>Value: A valid association session type from Section 8.4 (Association Session Types). </value>
+		/// <remarks>Note: Unless using transport layer encryption, "no-encryption" MUST NOT be used. </remarks>
+		[MessagePart("openid.session_type", IsRequired = false, AllowEmpty = true)]
+		[MessagePart("openid.session_type", IsRequired = true, AllowEmpty = false, MinVersion = "2.0")]
+		internal string SessionType { get; set; }
+
+		/// <summary>
+		/// Checks the message state for conformity to the protocol specification
+		/// and throws an exception if the message is invalid.
+		/// </summary>
+		/// <remarks>
+		/// 	<para>Some messages have required fields, or combinations of fields that must relate to each other
+		/// in specialized ways.  After deserializing a message, this method checks the state of the
+		/// message to see if it conforms to the protocol.</para>
+		/// 	<para>Note that this property should <i>not</i> check signatures or perform any state checks
+		/// outside this scope of this particular message.</para>
+		/// </remarks>
+		/// <exception cref="ProtocolException">Thrown if the message is invalid.</exception>
+		public override void EnsureValidMessage() {
+			base.EnsureValidMessage();
+
+			ErrorUtilities.VerifyProtocol(
+				!string.Equals(this.SessionType, Protocol.Args.SessionType.NoEncryption, StringComparison.Ordinal) || this.Recipient.IsTransportSecure(),
+				OpenIdStrings.NoEncryptionSessionRequiresHttps,
+				this);
+		}
+	}
+}