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我正在尝试运行在 RHEL 7 上托管的 debian 10 容器上运行的 asp.net core 3.1 mvc Web 应用程序。该应用程序正在通过 Azure Ad OIDC SSO 进行身份验证。该应用程序必须通过公司代理连接到 Azure AD。我正在尝试在 asp.net 核心中设置代理，以便只有身份验证流量通过代理。我的启动文件如下所示：

using AutoMapper;
using CMM_MVP.Factories;
using CMM_MVP.Models;
using CMM_MVP.Services;
using CMM_MVP.Utils;
using Microsoft.AspNetCore.Authentication.OpenIdConnect;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.DataProtection;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc.Authorization;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Identity.Web;
using Microsoft.Identity.Web.UI;
using Microsoft.IdentityModel.Logging;
using System;
using System.Data;
using System.Data.SqlClient;
using System.Net;
using System.Net.Http;

namespace CMM_MVP
{
    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.
        // For more information on how to configure your application, visit https://go.microsoft.com/fwlink/?LinkID=398940
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddAutoMapper(typeof(Startup));
            services.AddCors();
            services.AddAuthentication(OpenIdConnectDefaults.AuthenticationScheme)   
                .AddMicrosoftIdentityWebApp(Configuration.GetSection("AzureAd"));

            IdentityModelEventSource.ShowPII = true;

            services.AddControllersWithViews(options =>
            {
                var policy = new AuthorizationPolicyBuilder()
                .RequireAuthenticatedUser()
                .Build();
                options.Filters.Add(new AuthorizeFilter(policy));
            });

            services.AddRazorPages().AddMicrosoftIdentityUI();


            //allow the HTTP Context object to be passed as a service to the controllers.
            services.AddHttpContextAccessor();

            services.AddSingleton<ISqlServerConnectionUtil, SqlServerConnectionUtil>();
            services.AddSingleton<IRepository<CustomerModel>, MockCustomersRepository>();
            services.AddScoped<ICustomerService, CustomerService>();
            services.AddSingleton<IUserService, UserService>();
            services.AddScoped<ICaseService, CaseService>();
            services.AddScoped<IViewCaseService, ViewCaseService>();
            services.AddScoped(typeof(IModelFactory<>), typeof(ModelFactory<>));

            services.AddDataProtection()
                .SetApplicationName("xxx")
                .PersistKeysToFileSystem(new System.IO.DirectoryInfo(@"/var/dpkeys/"));

        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
                IdentityModelEventSource.ShowPII = true;
            }
            else {
                app.UseHsts();
            }
            // Add support for sessions before using routing 
            //app.UseSession();
            app.UseHttpsRedirection();
            app.UseStaticFiles();
            app.UseRouting();
            app.UseCors(builder =>
            {
                builder
                .AllowAnyOrigin()
                .AllowAnyMethod()
                .AllowAnyHeader();
            });

            app.UseAuthentication();
            app.UseAuthorization();
            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllerRoute(
                    name: "default",
                    pattern: "{controller=Home}/{action=Index}/{id?}");
            });
        }
    }
}

我已经看到使用 OpenIDConnect 存在其他线程：使用 .Net Core 3.00 从企业代理后面使用 Azure AD 进行身份验证 但是从那时起，Microsoft 已经引入并推荐 Microsoft.Identity.Web 用于我正在使用的 Azure AD OIDC 身份验证。我发现另一位同事使用了成功的以下设置（在 .AddMicrosoftIdentityWebApp(Configuration.GetSection("AzureAd")); 之后开始）：

        var aadProxy = new WebProxy()
        {
            Address = new Uri("http://address:port"),
            UseDefaultCredentials = true
            
        };

        IdentityModelEventSource.ShowPII = true;

        services.AddHttpClient("proxiedClient")
            .ConfigurePrimaryHttpMessageHandler(() => new HttpClientHandler()
            {
                UseProxy = true,
                Proxy = aadProxy,
                PreAuthenticate = true
            });
        services.Configure<AadIssuerValidatorOptions>(options => { options.HttpClientName = "proxiedClient"; });

他还使用了以下代码，这不适用于我，因为我没有设置 JwtTokens：

services.Configure<JwtBearerOptions>(JwtBearerDefaults.AuthenticationScheme, options =>
        {
            options.TokenValidationParameters.RoleClaimType = "roles";
            options.BackchannelHttpHandler = new HttpClientHandler()
            {
                UseProxy = true,
                Proxy = aadProxy,
                PreAuthenticate = true,
            };
        });

我知道“BackchannelHttpHandler”是处理来自 Azure AD 的元数据。我已经搜索了为我的用例设置 BackchannelHttpHandler 的方法，但找不到任何方法。

在我看来，设置 BackchannelHttpHandler 是我唯一缺少的 atm 但我不确定吗？

另外我不知道怎么配置呢？

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1 回答 1

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我已经让这个工作几天了，没有任何问题。回答我的两个问题：

  1. 在我看来，设置 BackchannelHttpHandler 是我唯一缺少的 atm 但我不确定吗？

答：BackchannelHttpHandler 确实是我唯一缺少的东西。

  1. 另外我不知道怎么配置呢？

答案：使用选项模式： https ://docs.microsoft.com/en-us/aspnet/core/fundamentals/configuration/options?view= aspnetcore-3.1 可以配置 BackchannelHttpHandler 属性：https ://docs.microsoft .com/en-us/dotnet/api/microsoft.aspnetcore.authentication.openidconnect.openidconnectoptions?view=aspnetcore-3.1 就在以下行之后： services.Configure(options => { options.HttpClientName = "proxiedClient"; });

在问题中。OpenIDConnect选项中配置BackchannelHttpHandler属性需要在上一行之后添加的代码如下：

    services.Configure<OpenIdConnectOptions>(OpenIdConnectDefaults.AuthenticationScheme, 
options =>
    {
        options.BackchannelHttpHandler = new HttpClientHandler()
        {
            UseProxy = true,
            Proxy = aadProxy,
            PreAuthenticate = true,
        };
    });

就这样。通过 Azure AD OpenID Connect 的 SSO 现在可以成功运行。

于 2021-06-24T09:56:09.840 回答