.net - Azure Active Directory API 始终显示禁止消息

Question

我是使用 Azure Active Directory 实现的初学者。我有一个带有 Azure Active Directory 保护的 WEB API (.net core)。我正在尝试通过 Postman 使用我的 WEB API，我知道它需要 Auth2 token 才能使用 Web API。我已经按照此生成 auth2 token documentation link .

生成 Auth2 token 后，在 header 中添加 auth2 token ，如 Authorization: Bearer e.... 但结果始终显示如下图所示。

我确信我会在“API 权限”部分中授予所需的权限，并且 Azure 门户中的“权限类型”为“委派权限”。

请参阅我的启动类(class):

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

    public IConfiguration Configuration { get; }

    public void ConfigureServices(IServiceCollection services)
    {
        services.AddMvc(o =>
        {
            o.Filters.Add(new AuthorizeFilter("default"));
        }).SetCompatibilityVersion(CompatibilityVersion.Version_2_1);

        services.AddAuthorization(o =>
        {
            o.AddPolicy("default", policy =>
            {
                // Require the basic "Access app-name" claim by default
                policy.RequireClaim(DotNetCoreApiSample.Authorization.Constants.ScopeClaimType, "user_impersonation");
            });
        });

        services
            .AddAuthentication(o =>
            {
                o.DefaultScheme = JwtBearerDefaults.AuthenticationScheme;
            })
            .AddJwtBearer(o =>
            {
                o.Authority = Configuration["Authentication:Authority"];
                o.TokenValidationParameters = new Microsoft.IdentityModel.Tokens.TokenValidationParameters
                {
                    // Both App ID URI and client id are valid audiences in the access token
                    ValidAudiences = new List<string>
                    {
                    Configuration["Authentication:AppIdUri"],
                    Configuration["Authentication:ClientId"]
                    }
                };
            });
        // Add claims transformation to split the scope claim value
        services.AddSingleton<IClaimsTransformation, AzureAdScopeClaimTransformation>();
    }

    public void Configure(IApplicationBuilder app, IHostingEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }

        // Very important that this is before MVC (or anything that will require authentication)
        app.UseAuthentication();

        app.UseMvc();
    }
}

Answer 1

根据我的测试，一旦配置了策略，您就可以使用范围 {您的资源 url}/user_impersonation 来请求访问 token ，然后您可以使用访问 token 调用您的应用程序。否则，您将收到 403 错误。请通过 link 检查您的访问 token 确保您的范围

我的测试代码如下1. Stratup.cs

 public void ConfigureServices(IServiceCollection services)
        {
            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);
            var tenatId = Configuration["AzureAd:TenantId"];
              services
             .AddAuthentication(o =>
             {
                 o.DefaultScheme = JwtBearerDefaults.AuthenticationScheme;
             })
             .AddJwtBearer(o =>
             {
                 o.Authority = "https://login.microsoftonline.com/<tenant id>/v2.0";
                 o.TokenValidationParameters = new Microsoft.IdentityModel.Tokens.TokenValidationParameters
                 {




                     ValidIssuers = new[] {
                     "https://sts.windows.net/<tenant id>/",
                  "https://login.microsoftonline.com/<tenant id>/v2.0"



                     },
                    // Both App ID URI and client id are valid audiences in the access token
                    ValidAudiences = new List<string>
                     {
                    "<app id>",
                    "<app id url>"
                     }
                 };
             });
            services.AddAuthorization(o =>
            {
                o.AddPolicy("default", policy =>
                {
                  policy.RequireClaim("http://schemas.microsoft.com/identity/claims/scope", "user_impersonation");
                });
            });
        }



        // 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.UseHsts();
            }
            app.UseAuthentication();



            app.UseHttpsRedirection();
            app.UseMvc();
        }

测试

a.获取访问 token

b.调用api