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Edit File: md5_phpbb2.php

<?php
/**
*
* This file is part of the phpBB Forum Software package.
*
* @copyright (c) phpBB Limited <https://www.phpbb.com>
* @license GNU General Public License, version 2 (GPL-2.0)
*
* For full copyright and license information, please see
* the docs/CREDITS.txt file.
*
*/

namespace phpbb\passwords\driver;

class md5_phpbb2 extends base
{
	const PREFIX = '$md5_phpbb2$';

/** @var \phpbb\request\request phpBB request object */
	protected $request;

/** @var \phpbb\passwords\driver\salted_md5 */
	protected $salted_md5;

/** @var \phpbb\passwords\driver\helper */
	protected $helper;

/** @var string phpBB root path */
	protected $phpbb_root_path;

/** @var string php file extension */
	protected $php_ext;

/**
	* Constructor of passwords driver object
	*
	* @param \phpbb\request\request $request phpBB request object
	* @param \phpbb\passwords\driver\salted_md5 $salted_md5 Salted md5 driver
	 * @param \phpbb\passwords\driver\helper $helper Driver helper
	* @param string $phpbb_root_path phpBB root path
	* @param string $php_ext PHP file extension
	*/
	public function __construct($request, salted_md5 $salted_md5, helper $helper, $phpbb_root_path, $php_ext)
	{
		$this->request = $request;
		$this->salted_md5 = $salted_md5;
		$this->helper = $helper;
		$this->phpbb_root_path = $phpbb_root_path;
		$this->php_ext = $php_ext;
	}

/**
	* {@inheritdoc}
	*/
	public function get_prefix()
	{
		return self::PREFIX;
	}

/**
	* {@inheritdoc}
	*/
	public function is_legacy()
	{
		return true;
	}

/**
	* {@inheritdoc}
	*/
	public function hash($password, $user_row = '')
	{
		// Do not support hashing
		return false;
	}

/**
	* {@inheritdoc}
	*/
	public function check($password, $hash, $user_row = array())
	{
		if (strlen($hash) != 32 && strlen($hash) != 34)
		{
			return false;
		}

// enable super globals to get literal value
		// this is needed to prevent unicode normalization
		$super_globals_disabled = $this->request->super_globals_disabled();
		if ($super_globals_disabled)
		{
			$this->request->enable_super_globals();
		}

// in phpBB2 passwords were used exactly as they were sent, with addslashes applied
		$password_old_format = isset($_REQUEST['password']) ? (string) $_REQUEST['password'] : '';
		$password_old_format = addslashes($password_old_format);
		$password_new_format = $this->request->variable('password', '', true);

if ($super_globals_disabled)
		{
			$this->request->disable_super_globals();
		}

if ($password == $password_new_format)
		{
			if (!function_exists('utf8_to_cp1252'))
			{
				include($this->phpbb_root_path . 'includes/utf/data/recode_basic.' . $this->php_ext);
			}

if ($this->helper->string_compare(md5($password_old_format), $hash) || $this->helper->string_compare(md5(\utf8_to_cp1252($password_old_format)), $hash)
				|| $this->salted_md5->check(md5($password_old_format), $hash) === true
				|| $this->salted_md5->check(md5(\utf8_to_cp1252($password_old_format)), $hash) === true)
			{
				return true;
			}
		}

return false;
	}
}