started adding authentication stack, thing that decides if we should be authenticated is in

src/Ocelot.Library/Infrastructure/Authentication/CouldNotFindConfigurationError.cs

@@ -0,0 +1,11 @@
+namespace Ocelot.Library.Infrastructure.Authentication
+{
+    using Responses;
+    public class CouldNotFindConfigurationError : Error
+    {
+        public CouldNotFindConfigurationError(string message) 
+            : base(message)
+        {
+        }
+    }
+}

src/Ocelot.Library/Infrastructure/Authentication/IRouteRequiresAuthentication.cs

@@ -0,0 +1,10 @@
+namespace Ocelot.Library.Infrastructure.Authentication
+{
+    using DownstreamRouteFinder;
+    using Responses;
+
+    public interface IRouteRequiresAuthentication
+    {
+        Response<bool> IsAuthenticated(DownstreamRoute downstreamRoute, string httpMethod);
+    }
+}

src/Ocelot.Library/Infrastructure/Authentication/RouteRequiresAuthentication.cs

@@ -0,0 +1,35 @@
+namespace Ocelot.Library.Infrastructure.Authentication
+{
+    using System;
+    using System.Collections.Generic;
+    using System.Linq;
+    using Configuration;
+    using DownstreamRouteFinder;
+    using Responses;
+
+    public class RouteRequiresAuthentication : IRouteRequiresAuthentication
+    {
+        private readonly IOcelotConfiguration _configuration;
+
+        public RouteRequiresAuthentication(IOcelotConfiguration configuration)
+        {
+            _configuration = configuration;
+        }
+
+        public Response<bool> IsAuthenticated(DownstreamRoute downstreamRoute, string httpMethod)
+        {
+            var reRoute =
+                _configuration.ReRoutes.FirstOrDefault(
+                    x =>
+                        x.DownstreamTemplate == downstreamRoute.DownstreamUrlTemplate &&
+                        string.Equals(x.UpstreamHttpMethod, httpMethod, StringComparison.CurrentCultureIgnoreCase));
+
+            if (reRoute == null)
+            {
+                return new ErrorResponse<bool>(new List<Error> {new CouldNotFindConfigurationError($"Could not find configuration for {downstreamRoute.DownstreamUrlTemplate} using method {httpMethod}")});
+            }
+
+            return new OkResponse<bool>(reRoute.IsAuthenticated);
+        }
+    }
+}