ASP.Net Identity 2.0 AccessFailedCount 不递增

Question

Last night I was working on a new project using FormsAuthentication and was customizing the ticket to include a security token so if the user logs off in one browser it logs off in all of them. In looking at the latest iteration of ASP.net Identity, it looks like it already has this functionality built in.

I created a new test MVC 5 web application with Individual Accounts enabled. Registration and authentication worked right out of the box.

However, I noticed that failed login attempts were not incrementing the AccessFailedCount field in the AspNetUsers table. And since that wasn't incrementing, I could try as many failed login attempts as I wanted without getting the account locked out.

How do I enable the AccessFailedCount and Lockout functionality on ASP.net Identity 2.0?

Answer 1

You have to handle this manually. The CheckPassword method calls the PasswordHasher.VerifyHashedPassword method to validate the password, but it does not update access failed count when the provided password does not match the existing one.

Here's an example of an authenticate method that supports lockout:

UserManager<User> userManager = new UserManager<User>(new UserStore());

if (userManager.SupportsUserLockout && userManager.IsLockedOut(userId))
    return;

var user = userManager.FindById(userId);
if (userManager.CheckPassword(user, password))
{
    if (userManager.SupportsUserLockout && userManager.GetAccessFailedCount(userId) > 0)
    {
        userManager.ResetAccessFailedCount(userId);
    }

    // Authenticate user
}
else
{
    if (userManager.SupportsUserLockout && userManager.GetLockoutEnabled(userId))
    {
        userManager.AccessFailed(userId);
    }
}

Answer 2

There is also the PasswordSignInAsync which accepts a "shouldLockout" argument. Setting this to true will auto increment failed login attempts

var result = await SignInManager.PasswordSignInAsync(model.Email, model.Password, model.RememberMe, shouldLockout: true);

Answer 3

For .NET Core 2.1 the shouldLockout is now named lockoutOnFailure

So your login call should look like this to increment failed login attempts:

var result = await SignInManager.PasswordSignInAsync(loginModel.Email, loginModel.Password, loginModel.RememberMe, lockoutOnFailure: true);

This will also reset the failed login attempts once the user logs in successfully.