Adds extensibility points for authenticating OAuth 2 clients at the client and authorization server ends.

Fixes #105
Related to #75

1 files changed, 26 insertions, 2 deletions

diff --git a/src/DotNetOpenAuth.OAuth2.Client/OAuth2/ChannelElements/OAuth2ClientChannel.cs b/src/DotNetOpenAuth.OAuth2.Client/OAuth2/ChannelElements/OAuth2ClientChannel.cs
index 54fc110..8ad2ed9 100644
--- a/src/DotNetOpenAuth.OAuth2.Client/OAuth2/ChannelElements/OAuth2ClientChannel.cs
+++ b/src/DotNetOpenAuth.OAuth2.Client/OAuth2/ChannelElements/OAuth2ClientChannel.cs
@@ -18,7 +18,7 @@ namespace DotNetOpenAuth.OAuth2.ChannelElements {
 	/// <summary>
 	/// The messaging channel used by OAuth 2.0 Clients.
 	/// </summary>
-	internal class OAuth2ClientChannel : OAuth2ChannelBase {
+	internal class OAuth2ClientChannel : OAuth2ChannelBase, IOAuth2ChannelWithClient {
 		/// <summary>
 		/// The messages receivable by this channel.
 		/// </summary>
@@ -34,10 +34,22 @@ namespace DotNetOpenAuth.OAuth2.ChannelElements {
 		/// <summary>
 		/// Initializes a new instance of the <see cref="OAuth2ClientChannel"/> class.
 		/// </summary>
-		internal OAuth2ClientChannel() : base(MessageTypes) {
+		internal OAuth2ClientChannel()
+			: base(MessageTypes) {
 		}
 
 		/// <summary>
+		/// Gets or sets the identifier by which this client is known to the Authorization Server.
+		/// </summary>
+		public string ClientIdentifier { get; set; }
+
+		/// <summary>
+		/// Gets or sets the tool to use to apply client credentials to authenticated requests to the Authorization Server.
+		/// </summary>
+		/// <value>May be <c>null</c> if this client has no client secret.</value>
+		public ClientCredentialApplicator ClientCredentialApplicator { get; set; }
+
+		/// <summary>
 		/// Prepares an HTTP request that carries a given message.
 		/// </summary>
 		/// <param name="request">The message to send.</param>
@@ -131,5 +143,17 @@ namespace DotNetOpenAuth.OAuth2.ChannelElements {
 			// Clients don't ever send direct responses.
 			throw new NotImplementedException();
 		}
+
+		/// <summary>
+		/// Performs additional processing on an outgoing web request before it is sent to the remote server.
+		/// </summary>
+		/// <param name="request">The request.</param>
+		protected override void PrepareHttpWebRequest(HttpWebRequest request) {
+			base.PrepareHttpWebRequest(request);
+
+			if (this.ClientCredentialApplicator != null) {
+				this.ClientCredentialApplicator.ApplyClientCredential(this.ClientIdentifier, request);
+			}
+		}
 	}
 }