.net core gRPC与IdentityServer4集成认证授权

本文主要是介绍.net core gRPC与IdentityServer4集成认证授权，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

前言

随着.net core3.0的正式发布，gRPC服务被集成到了VS2019。本文主要演示如何对gRPC的服务进行认证授权。

分析

目前.net core使用最广的认证授权组件是基于OAuth2.0协议的IdentityServer4。而gRPC可以与ASP.NET Core Authentication一起使用来实现认证授权功能。本文将创建3个应用程序来完成gRPC的认证授权演示过程。
img_www.wityx.com

步骤

Ids4.Server

1.创建一个.net core的webapi

2.nuget引用最新的IdentityServer4的包

<PackageReference Include="IdentityServer4" Version="3.0.1" />

IdentityServer4相关配置，因为是演示所以很简单，生产场景大家根据实际情况配置。

namespace Ids4.Server
{public class Config{public static IEnumerable<IdentityResource> GetIdentityResources(){return new List<IdentityResource>{new IdentityResources.OpenId(),new IdentityResources.Profile(),new IdentityResources.Email(),};}public static IEnumerable<ApiResource> GetApis(){return new List<ApiResource>{new ApiResource("api", "Demo API"){ApiSecrets = { new Secret("secret".Sha256()) }}};}public static IEnumerable<Client> GetClients(){return new List<Client>{new Client{ClientId = "client",ClientSecrets = { new Secret("secret".Sha256()) },AllowedGrantTypes = GrantTypes.ClientCredentials,AllowedScopes = { "api" },},};}}
}

4. startup.cs 注入服务

services.AddIdentityServer().AddInMemoryApiResources(Config.GetApis()).AddInMemoryIdentityResources(Config.GetIdentityResources()).AddInMemoryClients(Config.GetClients()).AddDeveloperSigningCredential(persistKey: false);

5. startup.cs 配置http请求管道

app.UseIdentityServer();

6. 启动服务，使用PostMan进行调试，有返回结果表示服务创建成功

POST /connect/token HTTP/1.1
Host: localhost:5000
Content-Type: application/x-www-form-urlencoded
grant_type=client_credentials&client_id=client1&client_secret=secret

{"access_token": "eyJhbGciOiJSUzI1NiIsImtpZCI6IlVyMmxuM2EwNGhWaGdDdWZTVTNtZVEiLCJ0eXAiOiJhdCtqd3QifQ.eyJuYmYiOjE1NzEzMDkwMTMsImV4cCI6MTU3MTMxMjYxMywiaXNzIjoiaHR0cDovL2xvY2FsaG9zdDo1MDAwIiwiYXVkIjoiYXBpIiwiY2xpZW50X2lkIjoiY2xpZW50Iiwic2NvcGUiOlsiYXBpIl19.X4pg9_FbPbWZl814XC0NYWTslfhMG4aXWEyXLrXhIojPJaL7Qvq9ieDF4S7x0psRcClwbwCg81hTrG3j2Cmcl0nzj_Ic7UY8MfN0dvAuy_fJdUf76TX0oOpir3SxgC8gnfaKyEoWmmbIyvwicWbKp9PP-EeTxG6-oMYn6PO22cwRVHDD28ZdEAq2DEkATOh9XPavoi9vGZhPQ1nviKL1K6tcYUGXSQbhWI9ISEqnTHqMX1xA_gcDIAplGvquXmtXdgyTsRoGolEtzDAYVH4sGUb1SpYx2nc8bgl6Qw27fhe0Uy9MR70kQMcEkCTdXLivjYjkuI9_quUyJHzdi5KgnQ","expires_in": 3600,"token_type": "Bearer","scope": "api"
}

本篇不对IdentityServer4做更多的讲解，大家可以参考官方文档了解更多。

Grpc.Server

1. 使用vs2019创建gRPC服务端。

2. 不用做任何更改，直接使用默认创建的gRPC服务

Grpc.Client

1. 创建一个控制台程序

2. 引入nuget安装包

<PackageReference Include="Google.Protobuf" Version="3.10.0" />
<PackageReference Include="Grpc.Net.Client" Version="2.23.2" />
<PackageReference Include="Grpc.Tools" Version="2.24.0"><PrivateAssets>all</PrivateAssets><IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
</PackageReference>

这3个核心包是客户端必备的，其中grpc.tools帮我们把proto文件转化成C#代码。

3. 创建Protos文件夹

4. 复制Grpc.Server项目Protos文件夹下的greet.proto文件到本项目的Protos文件夹

5. greet.proto文件右键设置gGRC Stub Classes为Client only。

img_www.wityx.com
也可以直接使用在项目文件里面代码设置如下：

<ItemGroup><Protobuf Include="Protos\greet.proto" GrpcServices="Client" />
</ItemGroup>

6. gRPC客户端访问服务端代码

var channel = GrpcChannel.ForAddress("https://localhost:5001");
var client = new Greeter.GreeterClient(channel);
var response = client.SayHello(new HelloRequest { Name = "World" });
Console.WriteLine(response.Message);

启动gRPC服务端，在启动gRPC客户端控制台打印hello word表示成功。
img_www.wityx.com
identityServer接入gRPC是非常容易，和传统webapi差不多。

改造Grpc.Server支持IdentityServer4

1. 引入nuget包

<PackageReference Include="IdentityServer4.AccessTokenValidation" Version="3.0.1" />

2. startup.cs 注入服务，和IdentityServer4一样。

services.AddGrpc(x => x.EnableDetailedErrors = false);
services.AddAuthorization();
services.AddAuthentication(IdentityServerAuthenticationDefaults.AuthenticationScheme).AddIdentityServerAuthentication(options =>{options.Authority = "http://localhost:5000";options.RequireHttpsMetadata = false;});

3. startup.cs 配置http请求管道

if (env.IsDevelopment())
{app.UseDeveloperExceptionPage();
}
app.UseRouting();
app.UseAuthentication();
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{endpoints.MapGrpcService<GreeterService>();endpoints.MapGet("/", async context =>{await context.Response.WriteAsync("Communication with gRPC endpoints must be made through a gRPC client. To learn how to create a client, visit: https://go.microsoft.com/fwlink/?linkid=2086909");});
});

4. 对需要授权的服务打标签[Authorize]，可以打在类上也可以打在方法上

[Authorize]
public class GreeterService : Greeter.GreeterBase
{
}

这个时候我们启动Grpc.Client访问Grpc.Server服务
www.wityx.com
发现报错401。说明此服务需要携带令牌才能访问。

改造Grpc.Client携带令牌访问

//获取token可以直接使用HttpClient来获取，这里使用IdentityModel来获取token
var httpClient = new HttpClient();
var disco = await httpClient.GetDiscoveryDocumentAsync("http://localhost:5000");
if (!disco.IsError)
{var token = await httpClient.RequestClientCredentialsTokenAsync(new ClientCredentialsTokenRequest(){Address = disco.TokenEndpoint,ClientId = "client",ClientSecret = "secret"});var tokenValue = "Bearer " + token.AccessToken;var metadata = new Metadata{{ "Authorization", tokenValue }};var callOptions = new CallOptions(metadata);var channel = GrpcChannel.ForAddress("https://localhost:5001");var client = new Greeter.GreeterClient(channel);var response = client.SayHello(new HelloRequest { Name = "World" }, callOptions);Console.WriteLine(response.Message);
}

执行程序返回hello world表示成功。