public async Task <IActionResult> Login(LoginInputModel model, string button) { if (button != "login") { // the user clicked the "cancel" button var context = await _interaction.GetAuthorizationContextAsync(model.ReturnUrl); if (context != null) { // if the user cancels, send a result back into IdentityServer as if they // denied the consent (even if this client does not require consent). // this will send back an access denied OIDC error response to the client. await _interaction.GrantConsentAsync(context, ConsentResponse.Denied); // we can trust model.ReturnUrl since GetAuthorizationContextAsync returned non-null return(Redirect(model.ReturnUrl)); } else { // since we don't have a valid context, then we just go back to the home page return(Redirect("~/")); } } if (ModelState.IsValid) { // validate username/password against in-memory store if (_users.ValidateCredentials(model.Username, model.Password)) { var user = _users.FindByUsername(model.Username); await _events.RaiseAsync(new UserLoginSuccessEvent(user.Username, user.SubjectId, user.Username)); // only set explicit expiration here if user chooses "remember me". // otherwise we rely upon expiration configured in cookie middleware. AuthenticationProperties props = null; if (AccountOptions.AllowRememberLogin && model.RememberLogin) { props = new AuthenticationProperties { IsPersistent = true, ExpiresUtc = DateTimeOffset.UtcNow.Add(AccountOptions.RememberMeLoginDuration) }; } ; // issue authentication cookie with subject ID and username await HttpContext.SignInAsync(user.SubjectId, user.Username, props); // make sure the returnUrl is still valid, and if so redirect back to authorize endpoint or a local page // the IsLocalUrl check is only necessary if you want to support additional local pages, otherwise IsValidReturnUrl is more strict if (_interaction.IsValidReturnUrl(model.ReturnUrl) || Url.IsLocalUrl(model.ReturnUrl)) { return(Redirect(model.ReturnUrl)); } return(Redirect("~/")); } await _events.RaiseAsync(new UserLoginFailureEvent(model.Username, "invalid credentials")); ModelState.AddModelError("", AccountOptions.InvalidCredentialsErrorMessage); } // something went wrong, show form with error var vm = await BuildLoginViewModelAsync(model); return(View(vm)); }