ASP.NET Core 5 WebAPI-Azure AD-使用Azure广告访问令牌的调用图API-C#/.NET问题

ASP.NET Core 5 WebAPI - Azure AD - Call Graph API Using Azure Ad Access Token(ASP.NET Core 5 WebAPI-Azure AD-使用Azure广告访问令牌的调用图API)

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问题描述

我已经使用.NET5创建了一个WebAPI，使用Azure AD对用户进行身份验证。我正在使用Postman生成访问令牌，并且WebAPI在作为持有者传递访问令牌时起作用。

我想使用访问令牌调用Graph API来获取用户日历&；配置文件，但无法这样做。我已经关注了下面提到的几篇文章，但没有运气。

使用访问令牌调用/我图形API时出现无效的身份验证令牌错误

仅使用我的组织的应用程序注册。我已将委派权限添加到Graph API。

已使用公开API创建自定义作用域，因为WebAPI引发签名无效错误。

我的WebAPI在StartUp.cs中配置服务代码：

services.AddMicrosoftIdentityWebApiAuthentication(Configuration);

我的AppSettings.json

  "AzureAd": {
    "Instance": "https://login.microsoftonline.com/",
    "Domain": "<Domain",
    "ClientId": "<ClientId>",
    "TenantId": "<TenantId>"
  },

我试着关注了几篇代表Flow的文章

https://joonasw.net/view/azure-ad-on-behalf-of-aspnet-core

Struggle with MS Graph and asp.net Core API

我迷路了，非常感谢您的帮助。

EDIT1：

我尝试实现Farid建议的解决方案。邮递员输出返回HTML响应以登录。它是一个ASP.NET Core 5 WebAPI，因此我将ConfigureServices代码更改为以下代码：

services.AddAuthentication(OpenIdConnectDefaults.AuthenticationScheme)              
         .AddMicrosoftIdentityWebApi(Configuration.GetSection("AzureAd"))
         .EnableTokenAcquisitionToCallDownstreamApi()
         .AddMicrosoftGraph(Configuration.GetSection("DownstreamApi"))
         .AddInMemoryTokenCaches();

我收到以下错误。

System.InvalidOperationException: No authenticationScheme was specified, and there was no DefaultChallengeScheme found. The default schemes can be set using either AddAuthentication(string defaultScheme) or AddAuthentication(Action<AuthenticationOptions> configureOptions).
   at Microsoft.AspNetCore.Authentication.AuthenticationService.ChallengeAsync(HttpContext context, String scheme, AuthenticationProperties properties)
   at Microsoft.AspNetCore.Authorization.Policy.AuthorizationMiddlewareResultHandler.HandleAsync(RequestDelegate next, HttpContext context, AuthorizationPolicy policy, PolicyAuthorizationResult authorizeResult)
   at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
   at Swashbuckle.AspNetCore.SwaggerUI.SwaggerUIMiddleware.Invoke(HttpContext httpContext)
   at Swashbuckle.AspNetCore.Swagger.SwaggerMiddleware.Invoke(HttpContext httpContext, ISwaggerProvider swaggerProvider)
   at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)

更新：

我使用以下代码解决了该错误：

services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)                 .AddMicrosoftIdentityWebApi(Configuration.GetSection("AzureAd"))
.EnableTokenAcquisitionToCallDownstreamApi()                    .AddMicrosoftGraph(Configuration.GetSection("DownstreamApi"))
.AddInMemoryTokenCaches();

我可以读取我的个人资料，但无法获取日历项目。这可能是由于管理员同意的要求。

推荐答案

根据您提供的信息，您的令牌似乎已过期，因此首先尝试重新生成令牌，此外，您已经添加了Delegated permissions这很好，但我怀疑您在添加Graph API权限后是否添加了授予管理员同意。所以这是强制性的，请仔细检查一下。请参见下面的屏幕截图。请按照以下步骤使用Microsoft Graph API获取令牌和用户信息

授予管理员同意：

令牌获取示例：

勾选appsettings.json，应如下所示：

{
  "AzureAd": {
    "Instance": "https://login.microsoftonline.com/",
    "Domain": "yourdemain.onmicrosoft.com",
    "TenantId": "",
    "ClientId": "",
    "ClientSecret": "",
    "ClientCertificates": [
    ],
    "CallbackPath": "/signin-oidc"
  },
  "DownstreamApi": {

    "BaseUrl": "https://graph.microsoft.com/v1.0",
    "Scopes": "https://graph.microsoft.com/.default"
  },
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  },
  "AllowedHosts": "*"
}

Startup.cs

  public void ConfigureServices(IServiceCollection services)
        {
            string[] initialScopes = Configuration.GetValue<string>("DownstreamApi:Scopes")?.Split(' ');

            services.AddAuthentication(OpenIdConnectDefaults.AuthenticationScheme)
                .AddMicrosoftIdentityWebApp(Configuration.GetSection("AzureAd"))
                .EnableTokenAcquisitionToCallDownstreamApi(initialScopes)
                .AddMicrosoftGraph(Configuration.GetSection("DownstreamApi"))
                .AddInMemoryTokenCaches();

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

注意：您可以忽略startup.cs.EnableTokenAcquisitionToCallDownstreamApi(initialScopes) .AddMicrosoftGraph(Configuration.GetSection("DownstreamApi"))下的ConfigureServices中的以下两项服务因为我使用Graph API SDK并从 appsettings.json所以在示例中，我为您的测试用例。因此，这不是必需的，也不取决于您。

控制器操作：

public async Task<object> GetUserInfoFromGraphAPI()
        {

            try
            {

                //Initialize on behalf of user token aquisition service

                var _tokenAcquisition = this.HttpContext.RequestServices.GetRequiredService<ITokenAcquisition>() as ITokenAcquisition;

                //define the scope
                string[] scopes = new string[] { "https://graph.microsoft.com/.default" };

                //Getting token from Azure Active Directory
                string accessToken = await _tokenAcquisition.GetAccessTokenForUserAsync(scopes);

                //Request Grap API end point
                HttpClient _client = new HttpClient();
                HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Get, string.Format("https://graph.microsoft.com/v1.0/me"));

                //Passing Token For this Request
                request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);
                HttpResponseMessage response = await _client.SendAsync(request);

                //Get User into from grpah API
                dynamic userInfo = JsonConvert.DeserializeObject<dynamic>(await response.Content.ReadAsStringAsync());


                return userInfo;
            }
            catch (Exception ex)
            {

                throw;
            }

        }

输出：