Startup.cs

using System;
using System.Collections.Generic;
using System.IdentityModel.Tokens.Jwt;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Authentication.Cookies;
using Microsoft.AspNetCore.Authentication.OpenIdConnect;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.IdentityModel.Tokens;
using WebMvc.Infrastructure;
using WebMvc.Services;

namespace WebMvc
{
    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.Configure<CookiePolicyOptions>(options =>
            {
                // This lambda determines whether user consent for non-essential cookies is needed for a given request.
                options.CheckConsentNeeded = context => true;
                options.MinimumSameSitePolicy = SameSiteMode.None;
            });

            JwtSecurityTokenHandler.DefaultInboundClaimTypeMap.Clear();
            var identityUrl = Configuration.GetValue<string>("IdentityUrl");
            var callBackUrl = Configuration.GetValue<string>("CallBackUrl");
            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);
            services.AddSingleton<IHttpClient, CustomHttpClient>();
            services.AddTransient<ICatalogService, CatalogService>();
            services.AddAuthentication(options =>
            {
                options.DefaultScheme = CookieAuthenticationDefaults.AuthenticationScheme;
                options.DefaultChallengeScheme = OpenIdConnectDefaults.AuthenticationScheme;
                // options.DefaultAuthenticateScheme = "Cookies";
            })
           .AddCookie()
           .AddOpenIdConnect(options =>
           {
               options.SignInScheme = CookieAuthenticationDefaults.AuthenticationScheme;

               options.Authority = identityUrl.ToString();
               options.SignedOutRedirectUri = callBackUrl.ToString();
               options.ClientId = "mvc";
               options.ClientSecret = "secret";
               options.ResponseType = "code id_token";
               options.SaveTokens = true;
               options.GetClaimsFromUserInfoEndpoint = true;
               options.RequireHttpsMetadata = false;
               options.Scope.Add("openid");
               options.Scope.Add("profile");
               options.Scope.Add("offline_access");
               options.TokenValidationParameters = new TokenValidationParameters()
               {

                   NameClaimType = "name",
                   RoleClaimType = "role"
               };
           });

        }
        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
            }

            app.UseStaticFiles();
            app.UseAuthentication();
            app.UseCookiePolicy();

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