指定 Windows AuthenticationScheme 和角色不起作用

Question

如何指定 AuthenticationScheme 是 Windows 并检查用户是否是 AD 组的成员？

当我指定 AuthenticationScheme 时，设置 Roles 不再有效，为什么不呢？我该如何解决？

public class SomeController : Controller
{
    //this works
    [Authorize(Roles = @"SOME.DOMAIN\SOME GROUP")]
    public IActionResult SomeAction(){ ... }

    //this works
    [Authorize(AuthenticationSchemes = "Windows")]
    //this doesn't work
    //[Authorize(Roles = @"SOME.DOMAIN\SOME GROUP", AuthenticationSchemes = "Windows")]
    public ActionResult SomeAction2(){ ... }
}

Full sample on GitHub

一些背景

我们有一个名为 SOME GROUP 的广告组，用户必须是该组的成员才能执行某些操作。在 Web 应用程序的其他部分，我们使用 cookie 身份验证，因此我需要在此特定控制器中指定身份验证方法。

参考：Authorize with a specific scheme in ASP.NET Core

Answer 1

Windows 身份验证对每个其他身份验证处理程序都是 different。 ASP.NET 不执行身份验证，windows 组件执行，并向 ASP.NET 核心传递它创建的身份的句柄。它不是为其他身份验证类型设计的，也不是为了与其他身份验证类型混合使用，它是 Windows 和匿名，或者只是 Windows。

不支持将它与其他任何东西混合使用，因此您永远不需要按方案进行限制，即使它确实有效。

Answer 2

事实证明，WindowsIdentity 保存在 HttpContext.User 对象中，允许我们检查 group/role 成员资格。

内联示例

using System.Security.Principal;

[Authorize(AuthenticationSchemes = IISServerDefaults.AuthenticationScheme)]
public ActionResult SomeAction()
{
    var windowsIdentity = HttpContext.User.Identity as WindowsIdentity;
    var windowsUser = new WindowsPrincipal(windowsIdentity);
    var role = "[MY-COMPUTER-NAME || AD GROUP NAME]\[GROUP NAME]";
    var inInRole = windowsUser.IsInRole(role);

    // todo: if not allowed write code to handle it

    return View();
}

Full source

政策示例

//AuthorizationHandler<T>
protected override Task HandleRequirementAsync(AuthorizationHandlerContext context, RoleRequirement requirement)
{
    if (!(context.User.Identity is WindowsIdentity windowsIdentity))
        return Task.CompletedTask;

    var windowsUser = new WindowsPrincipal(windowsIdentity);
    try
    {
        var hasRole = windowsUser?.IsInRole(requirement.GroupName) ?? false;
        if (hasRole)
            context.Succeed(requirement);
    }
    catch (Exception ex)
    {
        logger.LogError(ex, "Unable to check groups the user belongs too");
    }

    return Task.CompletedTask;
}

//IAuthorizationRequirement
public class RoleRequirement : IAuthorizationRequirement
{
    public RoleRequirement(string groupName)
    { GroupName = groupName; }

    /// <summary>
    /// The Windows / AD Group Name that is allowed to call the OMS API
    /// </summary>
    public string GroupName { get; }
}

//action protected with the policy
[Authorize("Super User Role")]
public IActionResult Contact()
{ return View(); }

//startup.cs
public void ConfigureServices(IServiceCollection services)
{
    //pull group name from the config
    var securityOptions = Configuration.GetSection("Security").Get<SecurityOptions>();

    services.AddAuthentication(IISDefaults.AuthenticationScheme);
    services.AddAuthorization(options =>
    {
        options.AddPolicy("Super User Role", policy =>
        {
            policy.Requirements.Add(new RoleRequirement(securityOptions.AllowedGroup));
            policy.AddAuthenticationSchemes("Windows");
        });
    });
    services.AddSingleton<IAuthorizationHandler, RoleHandler>();
    // ...
}

Full Source

指定 Windows AuthenticationScheme 和角色不起作用

Specifying Windows AuthenticationScheme and Roles Doesn't Work

authorization

asp.net-core

asp.net-core-security