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HOTP.php
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HOTP.php
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<?php
/**
* Kolab 2-Factor-Authentication HOTP driver implementation
*
* @author Thomas Bruederli <bruederli@kolabsys.com>
*
* Copyright (C) 2015, Kolab Systems AG <contact@kolabsys.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
namespace Kolab2FA\Driver;
class HOTP extends Base
{
public $method = 'hotp';
protected $config = array(
'digits' => 6,
'window' => 4,
'digest' => 'sha1',
);
protected $backend;
/**
*
*/
public function init($config)
{
parent::init($config);
$this->user_settings += array(
'secret' => array(
'type' => 'text',
'private' => true,
'label' => 'secret',
'generator' => 'generate_secret',
),
'counter' => array(
'type' => 'integer',
'editable' => false,
'hidden' => true,
'generator' => 'random_counter',
),
);
// copy config options
$this->backend = new \Kolab2FA\OTP\HOTP();
$this->backend
->setDigits($this->config['digits'])
->setDigest($this->config['digest'])
->setIssuer($this->config['issuer'])
->setIssuerIncludedAsParameter(true);
}
/**
*
*/
public function verify($code, $timestamp = null)
{
// get my secret from the user storage
$secret = $this->get('secret');
$counter = $this->get('counter');
if (!strlen($secret)) {
// LOG: "no secret set for user $this->username"
// rcube::console("VERIFY HOTP: no secret set for user $this->username");
return false;
}
try {
$this->backend->setLabel($this->username)->setSecret($secret)->setCounter(intval($this->get('counter')));
$pass = $this->backend->verify($code, $counter, $this->config['window']);
// store incremented counter value
$this->set('counter', $this->backend->getCounter());
$this->commit();
}
catch (\Exception $e) {
// LOG: exception
// rcube::console("VERIFY HOTP: $this->id, " . strval($e));
$pass = false;
}
// rcube::console('VERIFY HOTP', $this->username, $secret, $counter, $code, $pass);
return $pass;
}
/**
*
*/
public function get_provisioning_uri()
{
if (!$this->secret) {
// generate new secret and store it
$this->set('secret', $this->get('secret', true));
$this->set('counter', $this->get('counter', true));
$this->set('created', $this->get('created', true));
$this->commit();
}
// TODO: deny call if already active?
$this->backend->setLabel($this->username)->setSecret($this->secret)->setCounter(intval($this->get('counter')));
return $this->backend->getProvisioningUri();
}
/**
* Generate a random counter value
*/
public function random_counter()
{
return mt_rand(1, 999);
}
}

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HOTP.php (3 KB)

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