Create a new secret
| public createSecret ( $bits = 80, $requirecryptosecure = true ) |
public function testCreateSecretGeneratesDesiredAmountOfEntropy()
{
$rng = new TestRNGProvider(true);
$tfa = new TwoFactorAuth('Test', 6, 30, 'sha1', null, $rng);
$this->assertEquals('A', $tfa->createSecret(5));
$this->assertEquals('AB', $tfa->createSecret(6));
$this->assertEquals('ABCDEFGHIJKLMNOPQRSTUVWXYZ', $tfa->createSecret(128));
$this->assertEquals('ABCDEFGHIJKLMNOPQRSTUVWXYZ234567', $tfa->createSecret(160));
$this->assertEquals('ABCDEFGHIJKLMNOPQRSTUVWXYZ234567ABCDEFGHIJKLMNOPQRSTUVWXYZ234567', $tfa->createSecret(320));
$this->assertEquals('ABCDEFGHIJKLMNOPQRSTUVWXYZ234567ABCDEFGHIJKLMNOPQRSTUVWXYZ234567A', $tfa->createSecret(321));
}
/**
* Configure the Two-factor Authentication.
*
* @return \Cake\Network\Response|void
*/
public function configure()
{
$this->loadModel('Users');
$user = $this->Users->find()->contain(['UsersTwoFactorAuth'])->where(['Users.id' => $this->Auth->user('id')])->select(['Users.id', 'Users.username', 'Users.two_factor_auth_enabled', 'UsersTwoFactorAuth.id', 'UsersTwoFactorAuth.user_id', 'UsersTwoFactorAuth.secret', 'UsersTwoFactorAuth.username'])->first();
if ($user->two_factor_auth_enabled == true) {
$this->Flash->error(__('You have already set-up the Two-factor authentication.'));
return $this->redirect(['controller' => 'users', 'action' => 'security']);
}
$tfa = new TwoFactorAuth('Xeta');
if (!is_null($user->users_two_factor_auth)) {
$secret = $user->users_two_factor_auth->secret;
} else {
$this->loadModel('UsersTwoFactorAuth');
$secret = $tfa->createSecret();
$data = ['user_id' => $this->Auth->user('id'), 'secret' => $secret, 'username' => $user->username];
$entity = $this->UsersTwoFactorAuth->newEntity($data);
$this->UsersTwoFactorAuth->save($entity);
}
$imgSrc = $tfa->getQRCodeImageAsDataUri($user->username, $secret);
$secretCode = chunk_split($secret, 4, ' ');
$this->set(compact('imgSrc', 'secretCode'));
}
<!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();
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>
</body>
</html>
/**
* createSecret
* @return base32 shared secret stored in users table
*/
public function createSecret()
{
return $this->tfa->createSecret();
}
