No IUserTokenProvider is registered

Question

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?

Oxus

Is there any way you can check if a user exists based on other fields than the email address? For instance if i had two fields called CustomerNumber and Postcode for users who would already pre exist in the database to stop just anyone from registering – Sexy

You can refer to this S.O answer which takes care of this error and updates the password for the identity: https://mcmap.net/q/179520/-asp-net-identity-reset-password – Incommodious

Answer 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.

Liederkranz

what are "Sample" and "EmailConfirmation"? some text that can be anything? – Oxus

"Sample"=AppName, "EmailConfirmation"=purpose (like the parameter names) – Liederkranz

Yes, but you'll have to use the same for generating and validating tokens – Liederkranz

The link is OK. You put this code where you initialize the UserManager – Liederkranz

this causes 'Could not load type 'System.Security.Cryptography.DpapiDataProtector' from assembly in .netcore – Lise

Kind of surprised that 5 years later, the asp.net core docs still provide no helpful information that guides you to use this properly... – Finn

Answer 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.

Closure

That line save 2 hours of my time... thnak you . – Capernaum

Answer 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

Douceur

Answer 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.

Retinoscope

using Microsoft.Owin.Security.DataProtection; – Retinoscope

I had to use DataProtectorTokenProvider<IdentityUser, string> instead of <User, string> for both generics. Also the userId in GeneratePasswordResetToken is the guid string Id and not the userName or Email. – Alejandroalejo

Answer 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("[email protected]");
         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("[email protected]");
             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();
     }

Hydrogenate

Worked in web api controller too, just needed to use HttpContext.Current.GetOwinContext() – Loire

Answer 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.

Brookhouse

I think that's important to remember that this is a Asp .NET Core solution, it will not work with Asp .NET Framework. – Predacious

Answer 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

Piedadpiedmont

Answer 8

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());

Collusion

I followed this, but it didn't work (for GeneratePasswordResetToken -- but got the same error of "No IUserTokenProvider is registered"). After adding container.RegisterType<ApplicationUserManager>( new InjectionFactory(c => HttpContext.Current.GetOwinContext().GetUserManager<ApplicationUserManager>())); to UnityConfig.cs, it worked. – Tewell

Answer 9

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

Walkling

Answer 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"));
        }

Deme

Answer 11

It can also be useful for ASP.NET Framework (with simple sync task):

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

var userStore = new UserStore<IdentityUser>();
var userManager = new UserManager<IdentityUser>(userStore);
var user = userManager.FindByName(MyUserNameTextBox.Text);

var provider = new DpapiDataProtectionProvider(System.Web.Hosting.HostingEnvironment.ApplicationHost.GetSiteName());
userManager.UserTokenProvider = (IUserTokenProvider<IdentityUser, string>)(new DataProtectorTokenProvider<IdentityUser, string>(provider.Create("UserToken")) as IUserTokenProvider<IdentityUser, string>);

var token = userManager.GeneratePasswordResetToken(user.Id);
var result = userManager.ResetPassword(user.Id, token, MyPasswordTextBox.Text);

Tomahawk