c# - Windows Authentication Asp.net core 2 数据库角色授权

Question

我正在开发一个将使用 Asp.Net Core 2.1 和 Windows 身份验证的 Intranet 应用程序。我可以很好地从 IIS 获得传递，但我想使用存储在数据库中的角色进行授权。

我有一个 IClaimsTransformeration 类，它根据 LAN Id 从数据库中获取角色，并使用角色键将它们添加到声明列表中。

public class MyClaimsTransformer : IClaimsTransformation
{
    private readonly IUnitOfWorkMtuSecurity _unitOfWork;

    public MyClaimsTransformer(IUnitOfWorkMtuSecurity unitOfWork)
    {
        _unitOfWork = unitOfWork;
    }

    // Each time HttpContext.AuthenticateAsync() or HttpContext.SignInAsync(...) is called the claims transformer is invoked. So this might be invoked multiple times. 
    public async Task<ClaimsPrincipal> TransformAsync(ClaimsPrincipal principal)
    {
        var identity = principal.Identities.FirstOrDefault(x => x.IsAuthenticated);
        if (identity == null) return principal;

        //var user = await _userManager.GetUserAsync(principal);
        var user = identity.Name;
        if (user == null) return principal;

        //Get user with roles from repository.
        var dbUser = _unitOfWork.UserInformations.GetUserWithRoles(user);

        // Inject DbRoles into Claims list
        foreach (var role in dbUser.UserInformationUserRoles.Select((r=>r.UserRole)))
        {
            var claim = new Claim(ClaimTypes.Role, role.Name);
            identity.AddClaim(claim);
        }

        return new ClaimsPrincipal(identity);
    }  
}

我在 startup.cs 中将 IClaimsTransformation 添加到我的服务

services.AddScoped<IClaimsTransformation, MyClaimsTransformer>();

然后我将属性添加到我的 Controller

[Authorize(Roles = "Administrator")]

当我运行我的应用程序时，出现以下错误:

An unhandled exception occurred while processing the request. InvalidOperationException: No authenticationScheme was specified, and there was no DefaultForbidScheme found. Microsoft.AspNetCore.Authentication.AuthenticationService.ForbidAsync(HttpContext context, string scheme, AuthenticationProperties properties)

在 startup.cs 中，我将以下内容添加到服务中

services.AddAuthentication(IISDefaults.AuthenticationScheme);

这消除了错误，但无论如何我都会收到 403 错误。

You don't have authorization to view this page. HTTP ERROR 403

当我查看 MyClaimsTransformer 的返回值时，我可以看到管理员角色已添加到声明列表中，但无论怎样我都会收到 403 错误。

有人对我缺少的东西有什么建议吗？

如果我在我的 View 中使用以下语法，它在 View 级别起作用:

 @if (User.HasClaim("http://schemas.microsoft.com/ws/2008/06/identity/claims/role", "Administrator"))
                    {
                <li><a asp-area="" asp-controller="UserInformationAdmin" asp-action="Index">Admin</a></li>
                     } 

不过我必须指定整个架构 url。

Answer 1

ClaimIdentity 的 RoleClaimType 为“http://schemas.microsoft.com/ws/2008/06/identity/claims/groupsid”

它必须是“http://schemas.microsoft.com/ws/2008/06/identity/claims/role”的 RoleClaimType

由于这是一个只读属性，我更改了 TransformAsync 方法以创建一个新的 ClaimsPrincipal，而不是尝试将数据库角色添加到现有的声明中。我的应用程序不需要任何 AD 组，因此它只使用 Windows 进行身份验证。下面的代码似乎有效。

public class MyClaimsTransformer : IClaimsTransformation
{
    private readonly IUnitOfWorkSecurity _unitOfWork;

    public MyClaimsTransformer(IUnitOfWorkSecurity unitOfWork)
    {
        _unitOfWork = unitOfWork;
    }

    // Each time HttpContext.AuthenticateAsync() or HttpContext.SignInAsync(...) is called the claims transformer is invoked. So this might be invoked multiple times. 
    public async Task<ClaimsPrincipal> TransformAsync(ClaimsPrincipal principal)
    {
        var identity = principal.Identities.FirstOrDefault(x => x.IsAuthenticated);
        if (identity == null) return principal;

        var user = identity.Name;
        if (user == null) return principal;

        //Get user with roles from repository.
        var dbUser = _unitOfWork.UserInformations.GetUserWithRoles(user);

        var claims = new List<Claim>();

        //The claim identity uses a claim with the claim type below to determine the name property.
        claims.Add(new Claim(@"http://schemas.xmlsoap.org/ws/2005/05/identity/claims/name", user, "Name"));

        //todo: We should probably create a cache for this
        // Get User Roles from database and add to list of claims.
        foreach (var role in dbUser.UserInformationUserRoles.Select((r=>r.UserRole)))
        {
            claims.Add(new Claim(ClaimTypes.Role, role.Name));
        }

        var newClaimsIdentity = new ClaimsIdentity(claims,"Kerberos","", "http://schemas.microsoft.com/ws/2008/06/identity/claims/role");

        var newClaimsPrincipal = new ClaimsPrincipal(newClaimsIdentity);

        return new ClaimsPrincipal(newClaimsPrincipal);
    }  
}