From d311222ed694ad4151f308310cb53812c96733eb Mon Sep 17 00:00:00 2001
From: Brock Allen <brockallen@gmail.com>
Date: Wed, 7 Jun 2023 15:30:01 -0400
Subject: [PATCH] add response generator for BackchannelAuthenticationResult

---
 .../BuilderExtensions/Core.cs                 |  1 +
 .../BackchannelAuthenticationResult.cs        | 24 +++++++++++--------
 2 files changed, 15 insertions(+), 10 deletions(-)

diff --git a/src/IdentityServer/Configuration/DependencyInjection/BuilderExtensions/Core.cs b/src/IdentityServer/Configuration/DependencyInjection/BuilderExtensions/Core.cs
index 16c4ac594..d14a54f20 100644
--- a/src/IdentityServer/Configuration/DependencyInjection/BuilderExtensions/Core.cs
+++ b/src/IdentityServer/Configuration/DependencyInjection/BuilderExtensions/Core.cs
@@ -126,6 +126,7 @@ public static IIdentityServerBuilder AddDefaultEndpoints(this IIdentityServerBui
         builder.AddEndpointResultGenerator<DiscoveryDocumentResult, DiscoveryDocumentResultGenerator>();
         builder.AddEndpointResultGenerator<AuthorizeResult, AuthorizeResultGenerator>();
         builder.AddEndpointResultGenerator<AuthorizeInteractionPageResult, AuthorizeInteractionPageResultGenerator>();
+        builder.AddEndpointResultGenerator<BackchannelAuthenticationResult, BackchannelAuthenticationResultGenerator>();
 
         return builder;
     }
diff --git a/src/IdentityServer/Endpoints/Results/BackchannelAuthenticationResult.cs b/src/IdentityServer/Endpoints/Results/BackchannelAuthenticationResult.cs
index 05dce73f0..f44255b0a 100644
--- a/src/IdentityServer/Endpoints/Results/BackchannelAuthenticationResult.cs
+++ b/src/IdentityServer/Endpoints/Results/BackchannelAuthenticationResult.cs
@@ -12,7 +12,7 @@
 
 namespace Duende.IdentityServer.Endpoints.Results;
 
-internal class BackchannelAuthenticationResult : IEndpointResult
+internal class BackchannelAuthenticationResult : EndpointResult<BackchannelAuthenticationResult>
 {
     public BackchannelAuthenticationResponse Response { get; set; }
 
@@ -20,14 +20,17 @@ public BackchannelAuthenticationResult(BackchannelAuthenticationResponse respons
     {
         Response = response ?? throw new ArgumentNullException(nameof(response));
     }
+}
 
-    public async Task ExecuteAsync(HttpContext context)
+internal class BackchannelAuthenticationResultGenerator : IEndpointResultGenerator<BackchannelAuthenticationResult>
+{
+    public async Task ExecuteAsync(BackchannelAuthenticationResult result, HttpContext context)
     {
         context.Response.SetNoCache();
 
-        if (Response.IsError)
+        if (result.Response.IsError)
         {
-            switch (Response.Error)
+            switch (result.Response.Error)
             {
                 case OidcConstants.BackchannelAuthenticationRequestErrors.InvalidClient:
                     context.Response.StatusCode = 401;
@@ -40,9 +43,10 @@ public async Task ExecuteAsync(HttpContext context)
                     break;
             }
 
-            await context.Response.WriteJsonAsync(new ErrorResultDto { 
-                error = Response.Error,
-                error_description = Response.ErrorDescription
+            await context.Response.WriteJsonAsync(new ErrorResultDto
+            {
+                error = result.Response.Error,
+                error_description = result.Response.ErrorDescription
             });
         }
         else
@@ -50,9 +54,9 @@ await context.Response.WriteJsonAsync(new ErrorResultDto {
             context.Response.StatusCode = 200;
             await context.Response.WriteJsonAsync(new SuccessResultDto
             {
-                auth_req_id = Response.AuthenticationRequestId,
-                expires_in = Response.ExpiresIn,
-                interval = Response.Interval
+                auth_req_id = result.Response.AuthenticationRequestId,
+                expires_in = result.Response.ExpiresIn,
+                interval = result.Response.Interval
             });
         }
     }