ASP.Net Core Cookie 身份验证不是持久的

Question

我开始使用ASP.Net Core 2.2开发网站。我正在通过自定义 cookie 身份验证（而不是身份）实现登录/注销。

请查看或克隆repo：

git clone https://github.com/mrmowji/aspcore-custom-cookie-authentication.git .

...或阅读以下代码片段。

这里是代码Startup.cs：

public void ConfigureServices(IServiceCollection services) {
  ...

  services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme)
    .AddCookie(options => {
      options.LoginPath = new PathString("/login");
      options.ExpireTimeSpan = TimeSpan.FromDays(30);
      options.Cookie.Expiration = TimeSpan.FromDays(30);
      options.SlidingExpiration = true;
    });

  ...

public void Configure(IApplicationBuilder app, IHostingEnvironment env) {
  ...

  app.UseHttpsRedirection();
  app.UseStaticFiles();
  app.UseCookiePolicy();

  app.UseAuthentication();

  app.UseMvc(routes =>
  {
    ...

这是Login操作代码：

public async Task<IActionResult> Login(LoginViewModel userToLogin) {
  var username = "username"; // just to test
  var password = "password"; // just to test
  if (userToLogin.UserName == username && userToLogin.Password == password) {
    var claims = new List<Claim> {
      new Claim(ClaimTypes.Name, "admin"),
      new Claim(ClaimTypes.Role, "Administrator"),
    };

  var claimsIdentity = new ClaimsIdentity(
    claims, CookieAuthenticationDefaults.AuthenticationScheme);

  var authProperties = new AuthenticationProperties {
    AllowRefresh = true,
    ExpiresUtc = DateTimeOffset.UtcNow.AddDays(10),
    IsPersistent = true,
  };

  await HttpContext.SignInAsync(
    CookieAuthenticationDefaults.AuthenticationScheme,
    new ClaimsPrincipal(claimsIdentity),
    authProperties);

    ...

Cookie 已按预期设置。我有一个.AspNetCore.Cookies有效期为 10 天后的cookie。但是大约 30 分钟后，用户就被注销了。即使浏览器关闭，如何强制经过身份验证的用户保持登录状态？

Answer 1

感谢@LeonardoSeccia，我可以找到答案。请阅读对主要问题的评论。

我只需要在方法中添加数据保护服务ConfigureServices并提供一种方法来在某处存储/保留密钥（用于加密/解密敏感数据），否则每当服务器或应用程序池重新启动时，就会生成新密钥和旧密钥加密的数据（包括身份验证 cookie）不会以它们必须的方式解密，这会导致身份验证失败。如果您要部署到像我这样的共享主机，这是必要的。

如果您之前使用过 .Net Framework 中的 ASP.Net，则此数据保护概念在某种程度上等同于MachineKey.

我决定使用一个文件来存储密钥。这是最终的变化Startup.cs：

public Startup(IConfiguration configuration, IHostingEnvironment environment) {
  Configuration = configuration;
  hostingEnvironment = environment;
}

private IHostingEnvironment hostingEnvironment;

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) {
  // create a directory for keys if it doesn't exist
  // it'll be created in the root, beside the wwwroot directory
  var keysDirectoryName = "Keys";
  var keysDirectoryPath = Path.Combine(hostingEnvironment.ContentRootPath, keysDirectoryName);
  if (!Directory.Exists(keysDirectoryPath)) {
    Directory.CreateDirectory(keysDirectoryPath);
  }
  services.AddDataProtection()
    .PersistKeysToFileSystem(new DirectoryInfo(keysDirectoryPath))
    .SetApplicationName("CustomCookieAuthentication");

  services.Configure<CookiePolicyOptions>(options =>
  {
  ...