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)
{
var user = await _userManager.FindByNameAsync(model.Username);
if (user != null && await _userManager.CheckPasswordAsync(user, model.Password))
{
await _events.RaiseAsync(new UserLoginSuccessEvent(user.UserName, user.Id.ToString(), 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.Id.ToString(), user.UserName, props);
if (context != 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
}));
}
// we can trust model.ReturnUrl since GetAuthorizationContextAsync returned non-null
return(Redirect(model.ReturnUrl));
}
// request for a local page
if (Url.IsLocalUrl(model.ReturnUrl))
{
return(Redirect(model.ReturnUrl));
}
else if (string.IsNullOrEmpty(model.ReturnUrl))
{
return(Redirect("~/"));
}
else
{
// 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(string.Empty, AccountOptions.InvalidCredentialsErrorMessage);
}
// something went wrong, show form with error
var vm = await BuildLoginViewModelAsync(model);
return(View(vm));
}
private async Task <ProcessConsentResult> ProcessConsent(ConsentInputModel model)
{
var result = new ProcessConsentResult();
// Validate return url is still valid.
var request = await _interaction.GetAuthorizationContextAsync(model.ReturnUrl);
if (request == null)
{
return(result);
}
ConsentResponse grantedConsent = null;
// User clicked 'no' - send back the standard 'access_denied' response.
if (model?.Button == "no")
{
grantedConsent = new ConsentResponse {
Error = AuthorizationError.AccessDenied
};
// Emit event.
await _events.RaiseAsync(new ConsentDeniedEvent(User.GetSubjectId(), request.Client.ClientId, request.ValidatedResources.RawScopeValues));
}
// User clicked 'yes' - validate the data.
else if (model?.Button == "yes")
{
// If the user consented to some scope, build the response model.
if (model.ScopesConsented != null && model.ScopesConsented.Any())
{
var scopes = model.ScopesConsented;
if (ConsentOptions.EnableOfflineAccess == false)
{
scopes = scopes.Where(x => x != IdentityServerConstants.StandardScopes.OfflineAccess);
}
grantedConsent = new ConsentResponse {
RememberConsent = model.RememberConsent,
ScopesValuesConsented = scopes.ToArray(),
Description = model.Description
};
// Emit event.
await _events.RaiseAsync(new ConsentGrantedEvent(User.GetSubjectId(), request.Client.ClientId, request.ValidatedResources.RawScopeValues, grantedConsent.ScopesValuesConsented, grantedConsent.RememberConsent));
}
else
{
result.ValidationError = ConsentOptions.MustChooseOneErrorMessage;
}
}
else
{
result.ValidationError = ConsentOptions.InvalidSelectionErrorMessage;
}
if (grantedConsent != null)
{
// Communicate outcome of consent back to IdentityServer.
await _interaction.GrantConsentAsync(request, grantedConsent);
// Indicate that's it ok to redirect back to authorization endpoint.
result.RedirectUri = model.ReturnUrl;
result.Client = request.Client;
}
else
{
// We need to redisplay the consent UI.
result.ViewModel = await BuildViewModelAsync(model.ReturnUrl, model);
}
return(result);
}