No IUserTokenProvider is registered

问题

I recently updated Asp.Net Identity Core of my application form 1.0 to 2.0.

There are new features which I wanted to try like GenerateEmailConfirmationToken, etc.

I'm using this project as a reference.

When the user tries to register, I get error during the execution of Post method of Register

private readonly UserManager<ApplicationUser> _userManager;     

public ActionResult Register(RegisterViewModel model)
{
    if (ModelState.IsValid)
    {
        var ifUserEXists = _userManager.FindByName(model.EmailId);
        if (ifUserEXists == null) return View(model);
        var confirmationToken = _userRepository.CreateConfirmationToken();//this is how i'm generating token currently.                
        var result = _userRepository.CreateUser(model,confirmationToken);
        var user = _userManager.FindByName(model.EmailId);
        if (result)
        {
            var code = _userManager.GenerateEmailConfirmationToken(user.Id);//error here
            _userRepository.SendEmailConfirmation(model.EmailId, model.FirstName, confirmationToken);
            //Information("An email is sent to your email address. Please follow the link to activate your account.");
            return View("~/Views/Account/Thank_You_For_Registering.cshtml");
        }     
    }

    //Error("Sorry! email address already exists. Please try again with different email id.");
    ModelState.AddModelError(string.Empty, Resource.AccountController_Register_Sorry__User_already_exists__please_try_again_);
    return View(model);
}

In the line

 var code = _userManager.GenerateEmailConfirmationToken(user.Id);

I get error saying:

No IUserTokenProvider is registered.

For now, I just wanted to see what kind of code it generates. Is there some change I need to make to my ApplicationUser class that inherits from IdentityUser class?

Or is there something I need to change to get those function work?

回答1:

You have to specify a UserTokenProvider to generate a token.

using Microsoft.Owin.Security.DataProtection;
using Microsoft.AspNet.Identity.Owin;
// ...

var provider = new DpapiDataProtectionProvider("SampleAppName");

var userManager = new UserManager<ApplicationUser>(new UserStore<ApplicationUser>());

userManager.UserTokenProvider = new DataProtectorTokenProvider<ApplicationUser>(
    provider.Create("SampleTokenName"));

You should also read this article: Adding Two Factor Authentication to an Application Using ASP.NET Identity.

回答2:

In ASP.NET Core it's nowadays possible to configure a default service in the Startup.cs like this:

services.AddIdentity<ApplicationUser, IdentityRole>()
    .AddDefaultTokenProviders();

There is no need to call the DpapiDataProtectionProvideror anything like that. The DefaultTokenProviders() will take care of the call to GenerateEmailConfirmationToken from the UserManager.

回答3:

In addition to the accepted answer, I'd like to add that this approach will not work in Azure Web-Sites, you'd get CryptographicException instead of a token.

To get it fixed for Azure, implement your own IDataProtector: see this answer

Slightly more detail in blog-post

回答4:

My solution :

    var provider = new DpapiDataProtectionProvider("YourAppName");
    UserManager.UserTokenProvider = new DataProtectorTokenProvider<User, string>(provider.Create("UserToken")) 
        as IUserTokenProvider<User, string>;

My problem with this code solved.
Good luck friends.

回答5:

In case anyone else makes the same mistake that I did. I tried to make a function like the one below and sure enough the error "No IUserTokenProvider is registered." was gone. However as soon as I tried to use the link generated from "callbackUrl" I got the error "Invalid token." In order for it to work you need to get the HttpContext UserManager. If you are using a standard ASP.NET MVC 5 application with individual user accounts you can do it like below..

Code that works:

public ActionResult Index()
     {
         //Code to create ResetPassword URL
         var userManager = HttpContext.GetOwinContext().GetUserManager<ApplicationUserManager>();
         var user = userManager.FindByName("useremail@gmail.com");
         string code = userManager.GeneratePasswordResetToken(user.Id);
         var callbackUrl = Url.Action("ResetPassword", "Account", new { userId = user.Id, code = code }, protocol: Request.Url.Scheme);
         return View();
     }

First try that does not work, No IUserTokenProvider is registered. is gone but the URL created gets Invalid token..

public ActionResult NotWorkingCode()
     {
             //DOES NOT WORK - When used the error "Invalid token." will always trigger.
             var provider = new DpapiDataProtectionProvider("ApplicationName");
             var userManager = new ApplicationUserManager(new UserStore<ApplicationUser>(new ApplicationDbContext()));
             userManager.UserTokenProvider = new DataProtectorTokenProvider<ApplicationUser>(provider.Create("ASP.NET Identity"));
             var user = userManager.FindByName("useremail@gmail.com");
             string code = userManager.GeneratePasswordResetToken(user.Id);
             var callbackUrl = Url.Action("ResetPassword", "Account", new { userId = user.Id, code = code }, protocol: Request.Url.Scheme);
             //DOES NOT WORK - When used the error "Invalid token." will always trigger.
         return View();
     }

回答6:

As per pisker above

In startup.cs you can use

services.AddIdentity<ApplicationUser, IdentityRole>()
    .AddDefaultTokenProviders();

In .net core 2.0 you may need to add to the startup.cs:

using Microsoft.AspNetCore.Identity;

This worked fine for me.

回答7:

While modifying .NET Core's Identity files, I stumbled upon this error:

NotSupportedException: No IUserTwoFactorTokenProvider named 'Default' is registered.

The

Microsoft.AspNetCore.Identity.UserManager.GenerateUserTokenAsync

function couldn't generate a token because no provider was available upon registering a new user. This error has an easy fix though!

If you're like me, you changed AddDefaultIdentity in the Startup.cs file to AddIdentity. I wanted to implement my own user that inherited from the base user. By doing this I lost the default token providers. The fix was to add them back with AddDefaultTokenProviders().

        services.AddIdentity<User, UserRole>()
            .AddEntityFrameworkStores<ApplicationDbContext>()
            .AddDefaultTokenProviders();

After that fix, everything worked again!

source: https://mattferderer.com/NotSupportedException-No-IUserTwoFactorTokenProvider-tuser-named-default-registered

回答8:

You may also be intrested in looking here:
How to implement a TokenProvider in ASP.NET Identity 1.1 nightly build?
to use the default token provider implementation from Microsoft.Identity.Owin package

回答9:

I got the same error after updating Identity, and found that it was because I was using Unity.

See this question thread on the solution: Register IAuthenticationManager with Unity

Also below for quick reference:

Here is what I did to make Unity play nice with ASP.NET Identity 2.0:

I added the following to the RegisterTypes method in the UnityConfig class:

container.RegisterType<DbContext, ApplicationDbContext>(new HierarchicalLifetimeManager());
container.RegisterType<UserManager<ApplicationUser>>(new HierarchicalLifetimeManager());
container.RegisterType<IUserStore<ApplicationUser>, UserStore<ApplicationUser>>(new HierarchicalLifetimeManager());
container.RegisterType<AccountController>(new InjectionConstructor());

回答10:

in IdentityConfig.cs, Add your twofactor option:

        manager.RegisterTwoFactorProvider("PhoneCode", new PhoneNumberTokenProvider<ApplicationUser>
        {
            MessageFormat = "Your security code is {0}"
        });
        manager.RegisterTwoFactorProvider("EmailCode", new EmailTokenProvider<ApplicationUser>
        {
            Subject = "Security Code",
            BodyFormat = "Your security code is {0}"
        });
        //config sms service 
        manager.SmsService = new Services.SMS();
        var dataProtectionProvider = options.DataProtectionProvider;
        if (dataProtectionProvider != null)
        {
            manager.UserTokenProvider = new DataProtectorTokenProvider<ApplicationUser>(dataProtectionProvider.Create("ASP.NET Identity"));
        }

来源：https://stackoverflow.com/questions/22629936/no-iusertokenprovider-is-registered