public async Task <IActionResult> Login(LoginInputModel model, string button)
{
// check if we are in the context of an authorization request
var context = await _interaction.GetAuthorizationContextAsync(model.ReturnUrl);
// the user clicked the "cancel" button
if (button != "login")
{
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
if (await _clientStore.IsPkceClientAsync(context.ClientId))
{
// if the client is PKCE then we assume it's native, so this change in how to
// return the response is for better UX for the end user.
return(View("Redirect", new RedirectViewModel {
RedirectUrl = model.ReturnUrl
}));
}
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)
{
if (await _usersService.AreUserCredentialsValidAsync(model.Username, model.Password))
{
var user = await _usersService.GetUserByUsernameAsync(model.Username);
// 2-F.A
var id = new ClaimsIdentity();
id.AddClaim(new Claim(JwtClaimTypes.Subject, user.SubjectId));
await HttpContext.SignInAsync(scheme : Startup.TwoFactorAuthenticationScheme,
principal : new ClaimsPrincipal(id));
await _twoFactorAuthenticationService.SendTemporaryCodeAsync(user.SubjectId);
var redirectToAdditionalFactorUrl =
Url.Action("AdditionalAuthenticationFactor",
new
{
returnUrl = model.ReturnUrl,
rememberLogin = model.RememberLogin
});
// request for a local page
if (Url.IsLocalUrl(model.ReturnUrl))
{
//return Redirect(model.ReturnUrl);
return(Redirect(redirectToAdditionalFactorUrl));
}
if (string.IsNullOrEmpty(model.ReturnUrl))
{
return(Redirect("~/"));
}
// user might have clicked on a malicious link - should be logged
throw new Exception("invalid return URL");
}
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));
}