ASP.NET Core 2.0 AzureAD 身份验证不起作用

问题描述

我有一个 ASP.NET Core 2.0 应用程序设置，我想使用 AzureAd 对我公司的目录进行身份验证.我已经设置了类和启动方法并使身份验证工作正常，我遇到的问题是我正在尝试为 OnAuthorizationCodeReceived 事件设置事件处理程序，以便我可以请求一个用户令牌，然后用于 Microsoft 图形调用.

I have an ASP.NET Core 2.0 application setup that I want to use AzureAd for the authentication with my company's directory. I have setup the classes and startup method and have the authentication piece working, the problem that I'm having is that I'm trying to setup and event handler to the OnAuthorizationCodeReceived event, so that I can request a user token that will then be used for Microsoft graph calls.

在我的 Startup.cs 中，我有以下代码

In my Startup.cs I have the following code

public void ConfigureServices(IServiceCollection services)
        {
            services.AddAuthentication(sharedOptions =>
            {
                sharedOptions.DefaultScheme = CookieAuthenticationDefaults.AuthenticationScheme;
                sharedOptions.DefaultChallengeScheme = OpenIdConnectDefaults.AuthenticationScheme;
                sharedOptions.DefaultSignInScheme = CookieAuthenticationDefaults.AuthenticationScheme;
            })
            .AddAzureAd(options => Configuration.Bind("AzureAd", options))
            .AddCookie();

            services.AddMvc();

            services.AddSingleton(Configuration);
            services.AddSingleton<IGraphAuthProvider, GraphAuthProvider>();
            services.AddTransient<IGraphSDKHelper, GraphSDKHelper>();
        }

        // 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();
                app.UseBrowserLink();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
            }

            app.UseStaticFiles();

            app.UseAuthentication();

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

然后在 AzureAdAuthenticationBuilderExtensions.cs 我有以下代码.

Then in the AzureAdAuthenticationBuilderExtensions.cs I have the following code.

public static class AzureAdAuthenticationBuilderExtensions
{        
    public static AuthenticationBuilder AddAzureAd(this AuthenticationBuilder builder, IConfiguration configuration)
        => builder.AddAzureAd(_ => { }, configuration);

    public static AuthenticationBuilder AddAzureAd(this AuthenticationBuilder builder, Action<AzureAdOptions> configureOptions, 
        IConfiguration configuration)
    {
        builder.Services.Configure(configureOptions);
        builder.Services.AddSingleton<IConfigureOptions<OpenIdConnectOptions>, ConfigureAzureOptions>();
        builder.AddOpenIdConnect(opts =>
        {
            opts.ResponseType = "code id_token";

            opts.ClientId = configuration["AzureAd:ClientId"];
            opts.Authority = $"{configuration["AzureAd:Instance"]}{configuration["AzureAd:TenantId"]}";
            opts.UseTokenLifetime = true;
            opts.CallbackPath = configuration["AzureAd:CallbackPath"];
            opts.ClientSecret = configuration["AzureAd:ClientSecret"];
            opts.RequireHttpsMetadata = false;

            opts.Events = new OpenIdConnectEvents
            {
                OnAuthorizationCodeReceived = async context =>
                {
                    var credential = new ClientCredential(context.Options.ClientId, context.Options.ClientSecret);

                    var distributedCache = context.HttpContext.RequestServices.GetRequiredService<IDistributedCache>();
                    var userId = context.Principal
                        .FindFirst("http://schemas.microsoft.com/identity/claims/objectidentifier")
                        .Value;
                    var cache = new AdalDistributedTokenCache(distributedCache, userId);
                    var authContext = new AuthenticationContext(context.Options.Authority, cache);
                    await authContext.AcquireTokenByAuthorizationCodeAsync(context.TokenEndpointRequest.Code,
                        new Uri(context.TokenEndpointRequest.RedirectUri, UriKind.RelativeOrAbsolute), credential, context.Options.Resource);
                    context.HandleCodeRedemption();
                }
            };
        });
        return builder;
    }

    private class ConfigureAzureOptions: IConfigureNamedOptions<OpenIdConnectOptions>
    {
        private readonly AzureAdOptions _azureOptions;

        public ConfigureAzureOptions(IOptions<AzureAdOptions> azureOptions)
        {
            if (azureOptions != null)
            {
                _azureOptions = azureOptions.Value;
            }
        }

        public void Configure(string name, OpenIdConnectOptions options)
        {
            options.ClientId = _azureOptions.ClientId;
            options.Authority = $"{_azureOptions.Instance}{_azureOptions.TenantId}";
            options.UseTokenLifetime = true;
            options.CallbackPath = _azureOptions.CallbackPath;
            options.RequireHttpsMetadata = false;
            options.ClientSecret = _azureOptions.ClientSecret;
        }

        public void Configure(OpenIdConnectOptions options)
        {
            Configure(Options.DefaultName, options);
        }
    }
}

然后调用 AddAzureAd 方法，我可以看到它遍历该方法中的所有代码，但是当我在 OnAuthorizationCodeReceived 方法中放置断点时，断点永远不会被命中.我做了一堆阅读，看起来我所拥有的是正确的，所以我猜我一定在这里遗漏了一些简单的东西，但找不到问题.

Then AddAzureAd method is being called and I can see it walk through all of the code in this method, but when I put a breakpoint in the OnAuthorizationCodeReceived method that breakpoint never gets hit. I've done a bunch of reading and it looks like what I have is right, so I'm guessing that I must be missing something simple here, but can't find the problem.

已编辑我现在正在点击 OnAuthorizationCodeReceived 事件，但现在应用程序无法继续登录，出现以下错误

Editted I'm now hitting the OnAuthorizationCodeReceived event, but now the application is failing to continue to log in getting the following error

SecurityTokenException: Unable to validate the 'id_token', no suitable ISecurityTokenValidator was found for: ''."
Microsoft.AspNetCore.Authentication.RemoteAuthenticationHandler+<HandleRequestAsync>d__12.MoveNext()

Stack Query Cookies Headers
SecurityTokenException: Unable to validate the 'id_token', no suitable ISecurityTokenValidator was found for: ''."
Microsoft.AspNetCore.Authentication.RemoteAuthenticationHandler+<HandleRequestAsync>d__12.MoveNext()
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
System.Runtime.CompilerServices.TaskAwaiter.GetResult()
Microsoft.AspNetCore.Authentication.AuthenticationMiddleware+<Invoke>d__6.MoveNext()
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware+<Invoke>d__7.MoveNext()

推荐答案

Asp.net core 2.0的OpenIdConnect组件使用隐式流(response_type的值为id_token).

The OpenIdConnect component for Asp.net core 2.0 uses implicit flow(the value of response_type is id_token).

要触发 OnAuthorizationCodeReceived 事件，我们应该使用 'response_type' 参数包含 code 值的混合流.(例如.id_token 代码).我们需要通过 OpenIdConnectOptions 设置它，如下代码:

To fire the OnAuthorizationCodeReceived the event, we should use the hybrid flow which's 'response_type' parameter contains code value.(eg. id_token code). And we need set it through the OpenIdConnectOptions like code below:

.AddOpenIdConnect(options =>
{
    options.Authority = String.Format(Configuration["AzureAd:AadInstance"], Configuration["AzureAd:Tenant"]);
    options.ClientId = Configuration["AzureAd:ClientId"];
    options.ResponseType = "code id_token";     
});

options.Events = new OpenIdConnectEvents
{
    OnAuthorizationCodeReceived = async context =>
    {
        var credential = new ClientCredential(context.Options.ClientId, context.Options.ClientSecret);

        var authContext = new AuthenticationContext(context.Options.Authority);
        var authResult=await authContext.AcquireTokenByAuthorizationCodeAsync(context.TokenEndpointRequest.Code,
            new Uri(context.TokenEndpointRequest.RedirectUri, UriKind.RelativeOrAbsolute), credential, context.Options.Resource);
        context.HandleCodeRedemption(authResult.AccessToken, context.ProtocolMessage.IdToken);
    },
};

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