IdnentiyServer-使用客户端凭据访问API

情景如下:一个客户端要访问一个api,不需要用户登录,但是又不想直接暴露api给外部使用,这时可以使用identityserver添加访问权限。

客户端通过clientid和secrect访问identitserver的Token Endpoint,获取accesstoken;

接着客户端再使用accesstoken作为头部验证访问webapi。(webapi已经添加了identityserver的相关验证)。

 

代码实现:其中 “http://localhost:5000″是identityserver地址,”http://localhost:5001″是api地址

identityserver:在identityserver添加api和客户端,如下所示:定义了一个api1资源,client客户端。client客户端指定为ClientCredentials(客户端凭据)模式,并允许其访问api1。

 public class Config
    {
        // scopes define the API resources in your system
        public static IEnumerable<ApiResource> GetApiResources()
        {
            return new List<ApiResource>
            {
                new ApiResource("api1", "My API")
            };
        }

        // clients want to access resources (aka scopes)
        public static IEnumerable<Client> GetClients()
        {
            // client credentials client
            return new List<Client>
            {
                new Client
                {
                    ClientId = "client",
                    AllowedGrantTypes = GrantTypes.ClientCredentials,

                    ClientSecrets = 
                    {
                        new Secret("secret".Sha256())
                    },
                    AllowedScopes = { "api1" }
                }
            };
        }
    }

 

在startup配置identityserver如下:

public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            // configure identity server with in-memory stores, keys, clients and scopes
            services.AddIdentityServer()
                .AddDeveloperSigningCredential()
                .AddInMemoryApiResources(Config.GetApiResources())
                .AddInMemoryClients(Config.GetClients());
        }

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

            app.UseIdentityServer();
        }
    }

 

WebApi:在api添加identityserver的验证,代码如下,其中定义了同样的api名称,”http://localhost:5000″是identityserver的地址。

 public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddMvcCore()
                .AddAuthorization()
                .AddJsonFormatters();

            services.AddAuthentication("Bearer")
                .AddIdentityServerAuthentication(options =>
                {
                    options.Authority = "http://localhost:5000";
                    options.RequireHttpsMetadata = false;

                    options.ApiName = "api1";
                });
        }

        public void Configure(IApplicationBuilder app)
        {
            app.UseAuthentication();

            app.UseMvc();
        }
    }

 添加一个需要验证的控制器:

 [Route("[controller]")]
    [Authorize]
    public class IdentityController : ControllerBase
    {
        [HttpGet]
        public IActionResult Get()
        {
            return new JsonResult(from c in User.Claims select new { c.Type, c.Value });
        }
    }

 

客户端:

这里使用里IdentityModel类库

实际请求如下:

1.获取accesstoken:http://localhost:5000/connect/token?client_id=client&client_secret=secret&grant_type=client_credentials&scope=api1

2.请求api1

http://localhost:5001/identity
Headers
Authorization:accesstoken

 

public class Program
    {
        public static void Main(string[] args) => MainAsync().GetAwaiter().GetResult();
        
        private static async Task MainAsync()
        {
 //获取identitserver的各个端点地址
var disco = await DiscoveryClient.GetAsync("http://localhost:5000"); if (disco.IsError) { Console.WriteLine(disco.Error); return; }
//获取具有api1访问权限的accesstoken
var tokenClient = new TokenClient(disco.TokenEndpoint, "client", "secret"); var tokenResponse = await tokenClient.RequestClientCredentialsAsync("api1"); if (tokenResponse.IsError) { Console.WriteLine(tokenResponse.Error); return; } Console.WriteLine(tokenResponse.Json); Console.WriteLine("\n\n");
//设置accesstoken为http请求头,并访问api1
var client = new HttpClient(); client.SetBearerToken(tokenResponse.AccessToken); var response = await client.GetAsync("http://localhost:5001/identity"); if (!response.IsSuccessStatusCode) { Console.WriteLine(response.StatusCode); } else { var content = await response.Content.ReadAsStringAsync(); Console.WriteLine(JArray.Parse(content)); } } }

 

ps:

1.这里默认的accesstoken为jwt格式,客户端访问api时,api只需要在启动的时候访问identity获取秘钥即可。若为referencetoken,客户端访问api时,api需要授权访问的都会再请求一次identityserver,,而且api必须设置秘钥,client设置AccessTokenType属性为Reference。

2.可自定义AccessTokenLifetime(token存活时间),默认是3600秒,即一小时