如何更新 ASP.NET Identity 中的声明?

问题描述

我正在为我的 MVC5 项目使用 OWIN 身份验证.这是我的 SignInAsync

I'm using OWIN authentication for my MVC5 project.This is my SignInAsync

 private async Task SignInAsync(ApplicationUser user, bool isPersistent)
        {
            var AccountNo = "101";
            AuthenticationManager.SignOut(DefaultAuthenticationTypes.ExternalCookie);
            var identity = await UserManager.CreateIdentityAsync(user, DefaultAuthenticationTypes.ApplicationCookie);
            identity.AddClaim(new Claim(ClaimTypes.UserData, AccountNo));
            AuthenticationManager.SignIn(new AuthenticationProperties() { IsPersistent = isPersistent, RedirectUri="Account/Index"}, identity);
        }

如您所见，我将 AccountNo 添加到声明列表中.

As you can see, i added AccountNo into the Claims list.

现在，我如何在我的申请中的某个时间点更新此声明?到目前为止，我有这个:

Now, how can I update this Claim at some point in my application? So far, i have this:

 public string AccountNo
        {

            get
            {
                var CP = ClaimsPrincipal.Current.Identities.First();
                var Account= CP.Claims.FirstOrDefault(p => p.Type == ClaimTypes.UserData);
                return Account.Value;
            }
            set
            {
                var CP = ClaimsPrincipal.Current.Identities.First();
                var AccountNo= CP.Claims.FirstOrDefault(p => p.Type == ClaimTypes.UserData).Value;
                CP.RemoveClaim(new Claim(ClaimTypes.UserData,AccountNo));
                CP.AddClaim(new Claim(ClaimTypes.UserData, value));
            }

        }

当我尝试删除声明时，出现此异常:

when i try to remove the claim, I get this exception:

索赔'http://schemas.microsoft.com/ws/2008/06/identity/claims/userdata:101' 无法删除.它要么不是这个的一部分身份或者它是包含在 Principal 中的声明这个身份.例如，委托人将拥有索赔，当创建具有角色的 GenericPrincipal.角色将暴露通过构造函数中传递的身份，但不实际上归身份所有.类似的逻辑存在于角色主体.

如何删除和更新声明?

推荐答案

我创建了一个扩展方法来根据给定的 ClaimsIdentity 添加/更新/读取声明

I created a Extension method to Add/Update/Read Claims based on a given ClaimsIdentity

namespace Foobar.Common.Extensions
{
    public static class Extensions
    {
        public static void AddUpdateClaim(this IPrincipal currentPrincipal, string key, string value)
        {
            var identity = currentPrincipal.Identity as ClaimsIdentity;
            if (identity == null)
                return;

            // check for existing claim and remove it
            var existingClaim = identity.FindFirst(key);
            if (existingClaim != null)
                identity.RemoveClaim(existingClaim);

            // add new claim
            identity.AddClaim(new Claim(key, value));
            var authenticationManager = HttpContext.Current.GetOwinContext().Authentication;
            authenticationManager.AuthenticationResponseGrant = new AuthenticationResponseGrant(new ClaimsPrincipal(identity), new AuthenticationProperties() { IsPersistent = true });
        }

        public static string GetClaimValue(this IPrincipal currentPrincipal, string key)
        {
            var identity = currentPrincipal.Identity as ClaimsIdentity;
            if (identity == null)
                return null;

            var claim = identity.Claims.FirstOrDefault(c => c.Type == key);
            return claim.Value;
        }
    }
}

然后使用它

using Foobar.Common.Extensions;

namespace Foobar.Web.Main.Controllers
{
    public class HomeController : Controller
    {
        public ActionResult Index()
        {
            // add/updating claims
            User.AddUpdateClaim("key1", "value1");
            User.AddUpdateClaim("key2", "value2");
            User.AddUpdateClaim("key3", "value3");
        }

        public ActionResult Details()
        {
            // reading a claim
            var key2 = User.GetClaimValue("key2");          
        }
    }
}

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