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<?php
/**
*
* @package phpBB3
* @copyright (c) 2013 phpBB Group
* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
*
*/
/**
* @ignore
*/
if (!defined('IN_PHPBB'))
{
exit;
}
/**
* @package crypto
*/
class phpbb_crypto_driver_bcrypt extends phpbb_crypto_driver_base
{
const PREFIX = '$2a$';
/**
* @inheritdoc
*/
public function get_prefix()
{
return self::PREFIX;
}
/**
* @inheritdoc
*/
public function get_type()
{
return get_class($this);
}
/**
* @inheritdoc
*/
public function hash($password, $salt = '')
{
// The 2x and 2y prefixes of bcrypt might not be supported
// Revert to 2a if this is the case
$prefix = (!$this->is_supported()) ? '$2a$' : $this->get_prefix();
if ($salt == '')
{
$salt = $prefix . '10$' . $this->get_random_salt();
}
$hash = crypt($password, $salt);
return $hash;
}
/**
* @inheritdoc
*/
public function check($password, $hash)
{
$salt = substr($hash, 0, 29);
if (strlen($salt) != 29)
{
return false;
}
if ($hash == $this->hash($password, $salt))
{
return true;
}
return false;
}
/**
* Get a random salt value with a length of 22 characters
*
* @return string Salt for password hashing
*/
protected function get_random_salt()
{
return substr(str_replace('+', '.', bin2hex(openssl_random_pseudo_bytes(22))), 0, 22);
}
}
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