<?php
/************************************************************************
 * MXChange v0.2.1                                    Start: 10/08/2005 *
 * ===============                              Last change: 01/01/2006 *
 *                                                                      *
 * -------------------------------------------------------------------- *
 * File              : gen_sql_patches.php                              *
 * -------------------------------------------------------------------- *
 * Short description : Patch password system after upgrading            *
 * -------------------------------------------------------------------- *
 * Kurzbeschreibung  : Patcht das Passwort-System nach DB-Update        *
 * -------------------------------------------------------------------- *
 *                                                                      *
 * -------------------------------------------------------------------- *
 * Copyright (c) 2003 - 2008 by Roland Haeder                           *
 * For more information visit: http://www.mxchange.org                  *
 *                                                                      *
 * This program is free software; you can redistribute it and/or modify *
 * it under the terms of the GNU General Public License as published by *
 * the Free Software Foundation; either version 2 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 General Public License for more details.                         *
 *                                                                      *
 * You should have received a copy of the GNU General Public License    *
 * along with this program; if not, write to the Free Software          *
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,               *
 * MA  02110-1301  USA                                                  *
 ************************************************************************/

// Some security stuff...
if (ereg(basename(__FILE__), $_SERVER['PHP_SELF']))
{
        $INC = substr(dirname(__FILE__), 0, strpos(dirname(__FILE__), "/inc") + 4)."/security.php";
        require($INC);
}

// Check for version of sql_patches
if (GET_EXT_VERSION("sql_patches") < "0.3.6") return false;

// Check if there is no scrambling string
if (empty($CONFIG['pass_scramble']))
{
        // Generate 40 chars long scramble string
        $scrambleString = genScrambleString(40);

        // ... and store it there for future usage
        $result = SQL_QUERY_ESC("UPDATE "._MYSQL_PREFIX."_config SET pass_scramble='%s' WHERE config='0' LIMIT 1",
         array($scrambleString), __FILE__, __LINE__);

        // Also remember it in config
        $CONFIG['pass_scramble'] = $scrambleString;
        unset($scrambleString);
}

// Check if there is no master salt string
if (empty($CONFIG['master_salt']))
{
        // Generate the master salt which is the first chars minus 40 chars of this random hash
        // We do an extra scrambling here...
        $masterSalt = scrambleString(substr(generateHash(GEN_PASS(rand(128, 256))), 0, -40));

        // ... and store it there for future usage
        $result = SQL_QUERY_ESC("UPDATE "._MYSQL_PREFIX."_config SET master_salt='%s' WHERE config='0' LIMIT 1",
         array($masterSalt), __FILE__, __LINE__);

        // Also remember it in config
        $CONFIG['master_salt'] = $masterSalt;
        unset($masterSalt);
}

if (empty($CONFIG['file_hash']))
{
        // Create filename from hashed random string
        $file_hash = generateHash(GEN_PASS(rand(128, 256)));
        $file = PATH."inc/.secret/.".$file_hash;

        // File hash was never created
        $fp = @fopen($file, 'w') or mxchange_die("Cannot write secret key file!");
        if ($fp != false)
        {
                // Could write to secret file! So let's generate the secret key...
                // 1. Count of chars to be taken from back of the string
                $nums = rand(40, 45);
                // 2. Generate secret key from a randomized string
                $secretKey = substr(generateHash(GEN_PASS(rand(128, 256))), -$nums);
                // 3. Write the key to the file
                fwrite($fp, $secretKey);
                // 4. Close file
                fclose($fp);

                // Change access rights for more security
                @chmod($file, 0644);

                //* DEBUG: */ unlink($file);
                //* DEBUG: */ $test = hexdec($_COOKIE['u_hash']) / hexdec($secretKey);
                //* DEBUG: */ $test = generateHash(str_replace('.', '', $test));
                //* DEBUG: */ die("Secret-Key: ".$secretKey."<br>Cookie: ".$_COOKIE['u_hash']."<br>Test: ".$test);

                // Write $file_hash to database
                $result = SQL_QUERY_ESC("UPDATE "._MYSQL_PREFIX."_config SET file_hash='%s' WHERE config='0' LIMIT 1",
                 array($file_hash), __FILE__, __LINE__);

                // Also create .htaccess file
                $fp = @fopen(PATH."inc/.secret/.htaccess", 'w') or mxchange_die("Cannot write to .htaccess file!");
                if ($fp != false)
                {
                        // Add deny line to file
                        fwrite($fp, "Deny from all");

                        // Close the file
                        fclose($fp);
                }

                // Also update configuration
                $CONFIG['secret_key'] = $secretKey; unset($secretKey);
                $CONFIG['file_hash']  = $file_hash; unset($file_hash);
        }
}

//
?>