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<!doctype html> <html> <head> <title>Demo</title> </head> <body> <ol> <?php require_once 'loader.php'; Loader::register('../lib','RobThree\\Auth'); use \RobThree\Auth\TwoFactorAuth; $tfa = new TwoFactorAuth('MyApp'); echo '<li>First create a secret and associate it with a user'; $secret = $tfa->createSecret(160); // Though the default is an 80 bits secret (for backwards compatibility reasons) we recommend creating 160+ bits secrets (see RFC 4226 - Algorithm Requirements) echo '<li>Next create a QR code and let the user scan it:<br><img src="' . $tfa->getQRCodeImageAsDataUri('My label', $secret) . '"><br>...or display the secret to the user for manual entry: ' . chunk_split($secret, 4, ' '); $code = $tfa->getCode($secret); echo '<li>Next, have the user verify the code; at this time the code displayed by a 2FA-app would be: <span style="color:#00c">' . $code . '</span> (but that changes periodically)'; echo '<li>When the code checks out, 2FA can be / is enabled; store (encrypted?) secret with user and have the user verify a code each time a new session is started.'; echo '<li>When aforementioned code (' . $code . ') was entered, the result would be: ' . (($tfa->verifyCode($secret, $code) === true) ? '<span style="color:#0c0">OK</span>' : '<span style="color:#c00">FAIL</span>'); ?> </ol> <p>Note: Make sure your server-time is <a href="http://en.wikipedia.org/wiki/Network_Time_Protocol">NTP-synced</a>! Depending on the $discrepancy allowed your time cannot drift too much from the users' time!</p> <?php try { $tfa->ensureCorrectTime(); echo 'Your hosts time seems to be correct / within margin'; } catch (RobThree\Auth\TwoFactorAuthException $ex) { echo '<b>Warning:</b> Your hosts time seems to be off: ' . $ex->getMessage(); } ?> </body> </html>
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