带有自定义API密钥中间件的.Net Core JWT身份验证

我有一个使用JWT令牌授权用户的.Net Core 2.0应用程序。一切正常，但我想拥有某种API密钥机制以允许其他应用程序集成，但是我似乎无法使它与当前身份验证一起使用。

码：

启动文件

public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory,
            IMemoryCache cache, IServiceProvider serviceProvider)
{
    app.UseAuthentication();

    ApiKeyMiddlewear(app, serviceProvider);

    app.UseMvc(routes =>
    { 
        routes.MapRoute(
               name: "default",
                template: "{controller=Home}/{action=Index}/{id?}");

            routes.MapSpaFallbackRoute(
                name: "spa-fallback",
                defaults: new { controller = "Home", action = "Index" });
        });
    }
}


    private static void ApiKeyMiddlewear(IApplicationBuilder app, IServiceProvider serviceProvider)
    {
        app.Use(async (context, next) =>
        {
            if (context.Request.Path.StartsWithSegments(new PathString("/api")))
            {
                // Let's check if this is an API Call
                if (context.Request.Headers["ApiKey"].Any())
                {
                    // validate the supplied API key
                    // Validate it
                    var headerKey = context.Request.Headers["ApiKey"].FirstOrDefault();
                    var settingsProvider = serviceProvider.GetService<ISettingsService<OmbiSettings>>();
                    var ombiSettings = settingsProvider.GetSettings();
                    var valid = ombiSettings.ApiKey.Equals(headerKey, StringComparison.CurrentCultureIgnoreCase);
                    if (!valid)
                    {
                        context.Response.StatusCode = (int) HttpStatusCode.Unauthorized;
                        await context.Response.WriteAsync("Invalid API Key");
                    }
                    else
                    {
                        var identity = new GenericIdentity("API");
                        identity.AddClaim(new System.Security.Claims.Claim("Origin", "Api"));
                        identity.AddClaim(new System.Security.Claims.Claim("role", "Admin"));

                        var principal = new GenericPrincipal(identity, new[] {"ApiUser"});
                        context.User = principal;
                        await next();
                    }
                }
                else
                {
                    await next();
                }
            }
            else
            {
                await next();
            }
        });
    }
}

因此，在上面的代码中，您可以看到我正在拦截提供名为ApiKey的标头的HTTP请求，然后将其验证为已存储的内容。这部分都可以使用，但是当使用Authorize属性调用API方法时，该方法不起作用，并且我得到以下错误日志：

2017-09-19 08:15:17.280 +01:00 [Information] Request starting HTTP/1.1 POST http://localhost:52038/api/v1/Identity/ application/json 372
2017-09-19 08:15:21.967 +01:00 [Information] Authorization failed for user: "API".
2017-09-19 08:15:21.976 +01:00 [Information] Authorization failed for the request at filter '"Microsoft.AspNetCore.Mvc.Authorization.AuthorizeFilter"'.
2017-09-19 08:15:21.981 +01:00 [Information] Executing ForbidResult with authentication schemes ([]).
2017-09-19 08:15:21.991 +01:00 [Information] AuthenticationScheme: "Bearer" was forbidden.
2017-09-19 08:15:21.996 +01:00 [Information] Executed action "Ombi.Controllers.IdentityController.CreateUser (Ombi)" in 38.8268ms
2017-09-19 08:15:22.004 +01:00 [Information] Request finished in 4723.032ms 403 

现在，我猜测这与仅提供ApiKey标头而不是Authorization提供具有正确JWT令牌的标头的请求有关。

如何仅提供ApiKey标头，而当没有ApiKey标头时又回退到需要JWT令牌？