Add two factor authentication

app/Template/twofactor/index.php

@@ -0,0 +1,37 @@
+<div class="page-header">
+    <h2><?= t('Two factor authentication') ?></h2>
+</div>
+
+<form method="post" action="<?= $this->u('twofactor', 'save', array('user_id' => $user['id'])) ?>" autocomplete="off">
+
+    <?= $this->formCsrf() ?>
+    <?= $this->formCheckbox('twofactor_activated', t('Enable/disable two factor authentication'), 1, isset($user['twofactor_activated']) && $user['twofactor_activated'] == 1) ?>
+
+    <div class="form-actions">
+        <input type="submit" value="<?= t('Save') ?>" class="btn btn-blue"/>
+    </div>
+</form>
+
+<?php if ($user['twofactor_activated'] == 1): ?>
+<div class="listing">
+    <p><?= t('Secret key: ') ?><strong><?= $this->e($user['twofactor_secret']) ?></strong> (base32)</p>
+    <p><br/><img src="<?= $qrcode_url ?>"/><br/><br/></p>
+    <p>
+        <?= t('This QR Ccde contains the key URI: ') ?><strong><?= $this->e($key_url) ?></strong>
+        <br/><br/>
+        <?= t('Save the secret key in your TOTP software (by example Google Authenticator or FreeOTP).') ?>
+    </p>
+</div>
+
+<h3><?= t('Test your device') ?></h3>
+<form method="post" action="<?= $this->u('twofactor', 'test', array('user_id' => $user['id'])) ?>" autocomplete="off">
+
+    <?= $this->formCsrf() ?>
+    <?= $this->formLabel(t('Code'), 'code') ?>
+    <?= $this->formText('code', array(), array(), array('placeholder="123456"'), 'form-numeric') ?>
+
+    <div class="form-actions">
+        <input type="submit" value="<?= t('Check my code') ?>" class="btn btn-blue"/>
+    </div>
+</form>
+<?php endif ?>