ASP.NET Core 2.0 Web API Azure Ad v2令牌授权无效

Question

我正在尝试使用ASP.NET Core 2.0创建一个Web API服务器，该服务器使用azure ad v2端点令牌授权。我还有一个Angular 2应用程序，其中发生了office365登录。我从那里获得一个令牌，然后向Web API服务器中的授权操作发送一个简单的请求。但是我的令牌没有通过授权检查，我收到401 Unauthorized响应。提供的描述是：

Bearer error =“invalid_token”，error_description =“找不到签名密钥”

我解码了令牌，解码器也抛出了无效的签名错误。以下是我用于配置和令牌授权的代码的重要部分：

Web服务器API：

appsettings.json

{
  "AzureAd": {
    "Instance": "https://login.microsoftonline.com/",
    "ClientId": "my-registered-app-client-id",
  },
  "Logging": {
    "IncludeScopes": false,
    "Debug": {
      "LogLevel": {
        "Default": "Warning"
      }
    },
    "Console": {
      "LogLevel": {
        "Default": "Warning"
      }
    }
  }
}

AzureAdAuthenticationBuilderExtensions.cs

public static class AzureAdServiceCollectionExtensions
{
    public static AuthenticationBuilder AddAzureAdBearer(this AuthenticationBuilder builder)
        => builder.AddAzureAdBearer(_ => { });

    public static AuthenticationBuilder AddAzureAdBearer(this AuthenticationBuilder builder, Action<AzureAdOptions> configureOptions)
    {
        builder.Services.Configure(configureOptions);
        builder.Services.AddSingleton<IConfigureOptions<JwtBearerOptions>, ConfigureAzureOptions>();
        builder.AddJwtBearer();
        return builder;
    }

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

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

        public void Configure(string name, JwtBearerOptions options)
        {
            options.Audience = _azureOptions.ClientId;
            options.Authority = $"{_azureOptions.Instance}common/v2.0";

            options.TokenValidationParameters = new TokenValidationParameters
            {
                ValidateIssuer = false,
            };
        }

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

Startup.cs

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.AddAuthentication(sharedOptions =>
        {
            sharedOptions.DefaultScheme = JwtBearerDefaults.AuthenticationScheme;
        })
        .AddAzureAdBearer(options => Configuration.Bind("AzureAd", options));

        services.AddMvc();
        services.AddCors(options =>
        {
            options.AddPolicy("AllowAllOrigins",
             builder =>
             {
                 builder.AllowAnyMethod().AllowAnyHeader().AllowAnyOrigin();
             });
        });
    }

    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
    public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
    {
        loggerFactory.AddConsole(Configuration.GetSection("Logging"));
        loggerFactory.AddDebug();

        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }

        app.UseCors("AllowAllOrigins");

        app.UseAuthentication();
        app.UseMvc();
    }
}

现在这里是我用于在Angular2应用程序中进行身份验证的代码：

import { Injectable } from '@angular/core';
import { Headers } from '@angular/http';
import * as hello from 'hellojs/dist/hello.all.js';

import * as MicrosoftGraph from "@microsoft/microsoft-graph-types";
import * as MicrosoftGraphClient from "@microsoft/microsoft-graph-client";
import { Configs } from "../../../shared/configs"

@Injectable()
export class HttpService {
  url = `https://login.microsoftonline.com/common/oauth2/v2.0/authorize?client_id=${Configs.appId}&response_type=code&redirect_uri=http%3A%2F%2Flocalhost%2Fmyapp%2F&response_mode=query&scope=openid%20offline_access%20https%3A%2F%2Fgraph.microsoft.com%2Fmail.read&state=12345`;

  getAccessToken() {
    const msft = hello('msft').getAuthResponse();
    const accessToken = msft.access_token;
    return accessToken;
  }


  getClient(): MicrosoftGraphClient.Client
  {
    var client = MicrosoftGraphClient.Client.init({
      authProvider: (done) => {
          done(null, this.getAccessToken()); //first parameter takes an error if you can't get an access token
      },
      defaultVersion: 'v2.0'
    });
    return client;
  }
}

从端点返回令牌时，我向Web API服务器上的有效端点发送请求。

重要说明：我在Web API和Angular应用程序中使用相同的AppId，因为AzureAd v2.0端点需要它。

我的观点是，我认为我正在通过这本书做一切，但显然有些东西缺失了。如果有人能告诉我在配置中我做错了什么，我会感激不尽！

解码令牌的aud属性是：

https://graph.microsoft.com

Answer 1

在评论中进行了不那么短暂的讨论后，问题得到了解决。

讨论的关键点：

• 访问令牌包含aud声明，其值为https://graph.microsoft.com，这意味着该令牌适用于Microsoft Graph API，而不是其API
• 需要在https://apps.dev.microsoft.com/注册Web API，之后应用程序需要使用类似于scope的api://25f66106-edd6-4724-ae6f-3a204cfd9f63/access_as_user来请求访问令牌：aud

因此，请确保resource声明包含API的客户端ID或应用ID URI。这意味着它适用于您的API。

令牌还需要包含必要的范围。

在从AAD请求访问令牌时，请确保指定正确的范围。

此外，如果您使用的是v1端点，请确保使用ADAL，而不是MSAL。在v1中也代替范围，您必须使用qazxswpoi，其值必须设置为API的客户端ID或应用程序ID URI。