.NET Core 在 AzuerAD 身份验证后添加声明 [英] .NET Core add Claim after AzuerAD Authentication

问题描述

我的应用程序通过 AzureAD 登录，但现在我需要从数据库获取信息，然后将角色存储为声明.

My application signs in via AzureAD, but now I need to get information from the DB and then store the Role as a Claim.

所以我的问题是:如何在身份验证后将角色存储为声明?

So my question is: How can I store the Role as Claim after authentication ?

这是我试过的:

var user = User as ClaimsPrincipal;
var identity = user.Identity as ClaimsIdentity;
identity.AddClaim(new Claim(ClaimTypes.Role, "Admin"));  

但是当我转到另一个控制器时，该声明不再存在?

But when I go to another controller, the claim does not exist anymore ?

谢谢

推荐答案

您可以在身份验证期间实现，在 OIDC 中间件中，OnTokenValidated 为您提供修改从传入令牌获得的 ClaimsIdentity 的机会，以下代码供您参考:

You can achieve that during the authentication , in OIDC middleware , OnTokenValidatedoffers you the chance to modify the ClaimsIdentity obtained from the incoming token , code below is for your reference :

services.AddAuthentication(AzureADDefaults.AuthenticationScheme)
            .AddAzureAD(options => Configuration.Bind("AzureAd", options));


services.Configure<OpenIdConnectOptions>(AzureADDefaults.OpenIdScheme, options =>
{
    options.Events = new OpenIdConnectEvents
    {
        OnTokenValidated = ctx =>
        {
            //query the database to get the role

            // add claims
            var claims = new List<Claim>
            {
                new Claim(ClaimTypes.Role, "Admin")
            };
            var appIdentity = new ClaimsIdentity(claims);

            ctx.Principal.AddIdentity(appIdentity);

            return Task.CompletedTask;
        },
    };
});

然后在控制器中，您可以获得如下声明:

Then in controller , you can get the claim like :

var role = User.Claims.FirstOrDefault(c => c.Type == ClaimTypes.Role)?.Value;

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