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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 passwords
*/
class phpbb_passwords_manager
{
/**
* Default hashing method
*/
protected $type = false;
/**
* Hashing algorithm types
*/
protected $type_map = false;
/**
* Password convert flag. Password should be converted
*/
public $convert_flag = false;
/**
* Crypto helper
* @var phpbb_passwords_helper
*/
protected $helper;
/**
* phpBB configuration
* @var phpbb_config
*/
protected $config;
/**
* phpBB compiled container
* @var service_container
*/
protected $container;
/**
* Construct a passwords object
*
* @param phpbb_config $config phpBB configuration
*/
public function __construct($config, $container, $hashing_algorithms, $default)
{
$this->config = $config;
$this->container = $container;
$this->type = $default;
$this->fill_type_map($hashing_algorithms);
$this->load_passwords_helper();
}
/**
* Fill algorithm type map
*
* @param phpbb_di_service_collection $hashing_algorithms
*/
protected function fill_type_map($hashing_algorithms)
{
foreach ($hashing_algorithms as $algorithm)
{
if (!isset($this->type_map[$algorithm->get_prefix()]))
{
$this->type_map[$algorithm->get_prefix()] = $algorithm;
}
}
}
/**
* Load passwords helper class
*/
protected function load_passwords_helper()
{
if ($this->helper === null)
{
$this->helper = new phpbb_passwords_helper($this, $this->container);
}
}
/**
* Get the hash type from the supplied hash
*
* @param string $hash Password hash that should be checked
*
* @return object The hash type object
*/
public function get_hashing_algorithm($hash)
{
/*
* preg_match() will also show hashing algos like $2a\H$, which
* is a combination of bcrypt and phpass. Legacy algorithms
* like md5 will not be matched by this and need to be treated
* differently.
*/
if (!preg_match('#^\$([a-zA-Z0-9\\\]*?)\$#', $hash, $match))
{
return $this->type_map['$H$'];
}
// Be on the lookout for multiple hashing algorithms
// 2 is correct: H\2a > 2, H\P > 2
if (strlen($match[1]) > 2)
{
$hash_types = explode('\\', $match[1]);
$return_ary = array();
foreach ($hash_types as $type)
{
if (isset($this->type_map["\${$type}\$"]))
{
// we do not support the same hashing
// algorithm more than once
if (isset($return_ary[$type]))
{
return false;
}
$return_ary[$type] = $this->type_map["\${$type}\$"];
}
else
{
return false;
}
}
return $return_ary;
}
if (isset($this->type_map[$match[0]]))
{
return $this->type_map[$match[0]];
}
else
{
return false;
}
}
/**
* Hash supplied password
*
* @param string $password Password that should be hashed
* @param string $type Hash type. Will default to standard hash type if
* none is supplied
* @return string|bool Password hash of supplied password or false if
* if something went wrong during hashing
*/
public function hash_password($password, $type = '')
{
$type = ($type === '') ? $this->type : $type;
if (is_array($type))
{
return $this->helper->combined_hash_password($password, $type);
}
$hashing_algorithm = $this->container->get($type);
// Do not support 8-bit characters with $2a$ bcrypt
// Also see http://www.php.net/security/crypt_blowfish.php
if ($type === 'passwords.driver.bcrypt' || ($type === 'passwords.driver.bcrypt_2y' && !$hashing_algorithm->is_supported()))
{
if (ord($password[strlen($password)-1]) & 128)
{
return false;
}
}
return $this->container->get($type)->hash($password);
}
/**
* Check supplied password against hash and set convert_flag if password
* needs to be converted to different format (preferrably newer one)
*
* @param string $password Password that should be checked
* @param string $hash Stored hash
* @return string|bool True if password is correct, false if not
*/
public function check_hash($password, $hash)
{
// First find out what kind of hash we're dealing with
$stored_hash_type = $this->get_hashing_algorithm($hash);
if ($stored_hash_type == false)
{
return false;
}
// Multiple hash passes needed
if (is_array($stored_hash_type))
{
return $this->helper->check_combined_hash($password, $stored_hash_type, $hash);
}
if ($stored_hash_type->get_name() !== $this->type)
{
$this->convert_flag = true;
}
else
{
$this->convert_flag = false;
}
return $stored_hash_type->check($password, $hash);
}
}
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