How to validate security stamp on next request

Question

When using ASP.NET Core Identity how can I make it so a user's security stamp will be validated on the next request they make? For context I have a logout all sessions feature and I want to logout other sessions immediately on the next request after the account owner disconnects all. However Identity has an interval of X minutes before validating the security stamp of a session, so how can I make this immediate without setting the validation interval to 0?

Answer 1

the only way to validate the security token is via a database hit to get the saved value. If you want on every request, then set to 0, else the maximum time you want allow access.

Answer 2

so how can I make this immediate without setting the validation interval to 0?

Please try calling userManager.UpdateSecurityStampAsync(user) when logging out.

Please refer to the following Microsoft document for details:

ISecurityStampValidator and SignOut everywhere

"Call userManager.UpdateSecurityStampAsync(user) to force existing cookies to be invalided the next time they are checked."

Answer 3

Hi @iKingNinja,

As SurferOnWww said, you could use the userManager.UpdateSecurityStampAsync(user) method and the SecurityStampValidatorOptions.ValidationInterval Property to make the logout user's cookie invalid.

In the Asp.net core Identity Logout.cshtml.cs page (if you can't find this page from the Identity Areas, see Scaffold Identity in ASP.NET Core projects), in the OnPost method, find the current user and update the Security Stamp:

    public class LogoutModel : PageModel
    {
        private readonly SignInManager<IdentityUser> _signInManager;
        private readonly ILogger<LogoutModel> _logger;
        private readonly UserManager<IdentityUser> _userManager;
        public LogoutModel(SignInManager<IdentityUser> signInManager, ILogger<LogoutModel> logger, UserManager<IdentityUser> userManager)
        {
            _signInManager = signInManager;
            _logger = logger;
            _userManager = userManager;
        }

        public async Task<IActionResult> OnPost(string returnUrl = null)
        {
            //get the current user.
            var userId = _userManager.GetUserId(User);
            var user = await _userManager.FindByIdAsync(userId);

            //update the security stamp
            await _userManager.UpdateSecurityStampAsync(user);

            //signoutasync clears the user's claims stored in the cookie.
            await _signInManager.SignOutAsync();
            _logger.LogInformation("User logged out.");
            if (returnUrl != null)
            {
                return LocalRedirect(returnUrl);
            }
            else
            {
                // This needs to be a redirect so that the browser performs a new
                // request and the identity for the user gets updated.
                return RedirectToPage();
            }
        }
    }

Then, in the Program.cs file, add the following code to modify the validation interval.

builder.Services.Configure<SecurityStampValidatorOptions>(options =>
{
    // Force Identity's security stamp to be validated every 10 seconds.
    options.ValidationInterval = TimeSpan.FromSeconds(10); 
});

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Best regards,

Dillion