Personalizar el formulario de autenticación de dos factores

Not related tho this video, but related to 2FA,

How can I test this? I have this set up in an API and we are supposed to make 2FA mandatory, but I cannot really enforce that on the backend because of the tests... if I do it then I cannot login because I have no clue how to generate the code from the known seed so that I could cover the entire Auth flow on the tests...

Thanks

Never mind I found what I needed...

if someone else is in need of generating TOTP codes on their tests, do it like this:

```
use OTPHP\TOTP;

....

$otp = TOTP::create($totpSecret, 30, 'sha1', 6);
$key = $otp->at(time());

```

$key will be your 6 digit code...
play around have fun

Thanks for listening to my ted talk

Best TED talk ever, short and right to the point. Thanks for sharing your solution with others Fernando A.

Hello,

Thank you for another excellent tutorial! One thing that I was looking for in a security tutorial that was not covered was how to use LDAP/Active Directory for authentication. I have read through the documentation, but as a new Symfony user, it seems a bit fuzzy how to enable this along with a User entity. Perhaps this topic can be added in a future tutorial. It would be a huge help.

Cheers!

Nitrox

Hey Nitrox,

Yeah, this tutorial is missing that LDAP, but we already complicated it a lot with 2FA authentication, so no LDAP this time as well, sorry! I'll add this topic to our ideas pool, but fairly speaking I'm not sure we will cover this topic in the nearest future unfortunately - a lot of other good stuff is coming though.

Meanwhile, you can take a look at this Disqus thread: https://symfonycasts.com/sc... that I hope might help you at least partially - that LDAP topic is kinda popular and we get more and more requests about it. Maybe in the future we will cover it. Also, feel free to search for LDAP in comments on SymfonyCasts - you may find more related information about it: https://symfonycasts.com/se...

I hope this helps!

Cheers!

Thank you for your response. It was definitely helpful to see the approach to configure and debug LDAP. Keep up the amazing work you're doing and I look forward to the next tutorial.

Hey Nitrox,

You're welcome! I really happy to hear it was useful for you :)

Cheers!

Hi there!

Which next tutorial? And when it will happen?
Thanks for you job :)

Hey dzianisr our next course will be EasyAdminBundle and it will start releasing this week! :)

Any tip on how to set the user language in the /2fa page?
I see two possible ways, but can't find how to implement any of them :(

1. Instead of redirecting to /2fa, redirect to /{_locale}/2fa where {_locale} is taken from $user->getLang()
2. Keep the "/2fa" route, but show the localized strings in the form, and apply the correct language to the redirect after the successfull 2fa verification

I tried with
`$this->session->set('_locale', $user->getLang());`
in the LoginFormAuthenticator::onAuthenticationSuccess(), but it's not working

To localize the twig template I can read app.user.lang and manually pass that to the trans filter, but the issue is that after the 2fa submission, they are not redirected to the homepage with their language...

Hey The_nuts,

Tricky question. Ideally, go with the 1st option you mentioned. If you could localize that route, i.e. add {_locale} there - then Symfony will do the rest itself I think. If your website localized - then all routes that are generating in your system would be automatically generated in the current user locale thanks to the _locale in your routes. But for this, you need to localize all the routes in the system, including /2fa one and the other routes where the form is submitted on the /2fa page (I don't remember if it's a different route or the same /2fa).

With the 2nd option you will just have more problems IMO. First of all, search engine robots may index your website in one locale only which is not great for SEO and you will have problems generating links as you will need to pass the locale explicitly to all the links that are generated on non-localized page. Or yes, you can probably do it with listeners, but you need to choose the correct event. I suppose you need to inject the proper locale *before* the Symfony core event, otherwise if you set it later in the code - it may not have any effect.

So, I'd suggest you to go with the first option as I think it should be the best, probably you can easily achieve this for all 2fa bundle routes with route prefix, see https://symfony.com/doc/cur...

I hope this helps!

Cheers!

Thank you very much, yes all my routes are already localized, it was quite simple!

Hey The_nuts,

Awesome! Thanks for confirming it worked for you, happy to hear it was achieved that easy :)

Cheers!

I found this event (subscribed to TwoFactorAuthenticationEvents::FORM),
I can read the user lang and set it to the request, but it doesn't work :(

public function onTwoFactorForm(TwoFactorAuthenticationEvent $event)
{
    $event->getRequest()->setLocale($event->getToken()->getUser()->getLang());
}

Hello, for the activation of 2fa with the qr-code, I set up a form for the user to scan the qr-code then validate immediately afterwards with a code, in order to formalize the fact that it will use 2fa.

When he submits the verification code after scanning the QR-code, if he is wrong, then the page is reloaded and the error that the code is incorrect is displayed, but the qr-code is also changed.

So he will have to delete the previously created account and scan a qr-code again.

In the following method:

    #[Route(path: '/authentification/2fa/qr-code', name: 'app_qr_code')]
    public function displayGoogleAuthenticatorQrCode(): Response
    {
        $qrCodeContent = $this->totpAuthenticator->getQRContent($this->getUser());
        $result = Builder::create()
            ->data($qrCodeContent)
            ->build();

        return new Response($result->getString(), 200, ['Content-Type' => 'image/png']);
    }

Can I set up a user-specific cache so that the qr-code doesn't change if they make a mistake confirming the code?

A cache of 15 min for example.
And I also cache 15 minutes when generating a totpCode that I assign to the user.

Does this pose security issues? Will the QR-code still be valid?

Thanks !

Hey Kiuega,

You probably should not render that QR code on the same page where you prompt user for input the code. Take a look at other websites that have similar behaviour, the easiest would be to render the QR on one page, and then ask user to go to the next page where they will be able to validate it, i.e. those should be different pages.

But in short, you just should not re-render the QR code. You can achieve this in a different way: use different pages, or use a boolean flag on User field that will help you to decide if you should render the code or no, etc.

I hope this helps!

Cheers!