476 lines
12 KiB
PHP
476 lines
12 KiB
PHP
<?php
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/*
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+--------------------------------------------------------------------------
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| Invision Power Board 2.1.7
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| =============================================
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| by Matthew Mecham
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| (c) 2001 - 2005 Invision Power Services, Inc.
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| http://www.invisionpower.com
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| =============================================
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| Web: http://www.invisionboard.com
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| http://www.ibresource.ru/products/invisionpowerboard/
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| Time: Tuesday 18th of July 2006 05:56:00 PM
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| Release: 52f408a29988b02f45b5e6f4ba5af0ae
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| Licence Info: http://www.invisionboard.com/?license
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| http://www.ibresource.ru/license
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+---------------------------------------------------------------------------
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| INVISION POWER BOARD IS NOT FREE / OPEN SOURCE!
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+---------------------------------------------------------------------------
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| INVISION POWER BOARD ÍÅ ßÂËßÅÒÑß ÁÅÑÏËÀÒÍÛÌ ÏÐÎÃÐÀÌÌÍÛÌ ÎÁÅÑÏÅ×ÅÍÈÅÌ!
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| Ïðàâà íà ÏÎ ïðèíàäëåæàò Invision Power Services
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| Ïðàâà íà ïåðåâîä IBResource (http://www.ibresource.ru)
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+---------------------------------------------------------------------------
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| > $Date: 2005-10-10 14:03:20 +0100 (Mon, 10 Oct 2005) $
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| > $Revision: 22 $
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| > $Author: matt $
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+---------------------------------------------------------------------------
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| > UPLOAD handling methods (KERNEL)
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| > Module written by Matt Mecham
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| > Date started: 15th March 2004
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| > Module Version Number: 1.0.0
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+--------------------------------------------------------------------------
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| ERRORS:
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| 1: No upload
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| 2: Not valid upload type
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| 3: Upload exceeds $max_file_size
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| 4: Could not move uploaded file, upload deleted
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| 5: File pretending to be an image but isn't (poss XSS attack)
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+--------------------------------------------------------------------------
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*/
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/**
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* IPS Kernel Pages: Upload
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*
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* This class contains all generic functions to handle
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* the parsing of $_FILE data.
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*
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* Example Usage:
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* <code>
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* $upload = new class_upload();
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* $upload->out_file_dir = './uploads';
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* $upload->max_file_size = '10000000';
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* $upload->make_script_safe = 1;
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* $upload->allowed_file_ext = array( 'gif', 'jpg', 'jpeg', 'png' );
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* $upload->upload_process();
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*
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* if ( $upload->error_no )
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* {
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* switch( $upload->error_no )
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* {
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* case 1:
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* // No upload
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* print "No upload"; exit();
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* case 2:
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* case 5:
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* // Invalid file ext
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* print "Invalid File Extension"; exit();
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* case 3:
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* // Too big...
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* print "File too big"; exit();
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* case 4:
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* // Cannot move uploaded file
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* print "Move failed"; exit();
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* }
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* }
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* print $upload->saved_upload_name . " uploaded!";
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* </code>
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* ERRORS:
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* 1: No upload
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* 2: Not valid upload type
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* 3: Upload exceeds $max_file_size
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* 4: Could not move uploaded file, upload deleted
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* 5: File pretending to be an image but isn't (poss XSS attack)
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*
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* @package IPS_KERNEL
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* @author Matt Mecham
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* @copyright Invision Power Services, Inc.
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* @version 2.1
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*/
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/**
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*
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*/
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/**
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* Upload Class
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*
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* Methods and functions for handling file uploads
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*
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* @package IPS_KERNEL
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* @author Matt Mecham
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* @version 2.1
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*/
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class class_upload
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{
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/**
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* Name of upload form field
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*
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* @var string
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*/
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var $upload_form_field = 'FILE_UPLOAD';
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/**
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* Out filename *without* extension
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* (Leave blank to retain user filename)
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*
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* @var string
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*/
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var $out_file_name = '';
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/**
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* Out dir (./upload) - no trailing slash
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*
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* @var string
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*/
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var $out_file_dir = './';
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/**
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* maximum file size of this upload
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*
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* @var integer
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*/
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var $max_file_size = 0;
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/**
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* Forces PHP, CGI, etc to text
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*
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* @var integer
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*/
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var $make_script_safe = 1;
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/**
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* Force non-img file extenstion (leave blank if not) (ex: 'ibf' makes upload.doc => upload.ibf)
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*
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* @var string
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*/
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var $force_data_ext = '';
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/**
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* Allowed file extensions array( 'gif', 'jpg', 'jpeg'..)
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*
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* @var array
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*/
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var $allowed_file_ext = array();
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/**
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* Array of IMAGE file extensions
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*
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* @var array
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*/
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var $image_ext = array( 'gif', 'jpeg', 'jpg', 'jpe', 'png' );
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/**
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* Check to make sure an image is an image
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*
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* @var boolean flag
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*/
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var $image_check = 1;
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/**
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* Returns current file extension
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*
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* @var string
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*/
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var $file_extension = '';
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/**
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* If force_data_ext == 1, this will return the 'real' extension
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* and $file_extension will return the 'force_data_ext'
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*
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* @var string
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*/
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var $real_file_extension = '';
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/**
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* Returns error number
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*
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* @var integer
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*/
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var $error_no = 0;
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/**
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* Returns if upload is img or not
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*
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* @var integer
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*/
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var $is_image = 0;
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/**
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* Returns file name as was uploaded by user
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*
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* @var string
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*/
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var $original_file_name = "";
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/**
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* Returns final file name as is saved on disk. (no path info)
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*
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* @var string
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*/
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var $parsed_file_name = "";
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/**
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* Returns final file name with path info
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*
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* @var string
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*/
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var $saved_upload_name = "";
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/*-------------------------------------------------------------------------*/
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// CONSTRUCTOR
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/*-------------------------------------------------------------------------*/
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function class_upload()
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{
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}
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/*-------------------------------------------------------------------------*/
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// PROCESS THE UPLOAD
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/*-------------------------------------------------------------------------*/
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/**
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* Processes the upload
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*
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*/
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function upload_process()
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{
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$this->_clean_paths();
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//-------------------------------------------------
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// Check for getimagesize
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//-------------------------------------------------
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if ( ! function_exists( 'getimagesize' ) )
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{
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$this->image_check = 0;
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}
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//-------------------------------------------------
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// Set up some variables to stop carpals developing
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//-------------------------------------------------
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$FILE_NAME = $_FILES[ $this->upload_form_field ]['name'];
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$FILE_SIZE = $_FILES[ $this->upload_form_field ]['size'];
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$FILE_TYPE = $_FILES[ $this->upload_form_field ]['type'];
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//-------------------------------------------------
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// Naughty Opera adds the filename on the end of the
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// mime type - we don't want this.
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//-------------------------------------------------
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$FILE_TYPE = preg_replace( "/^(.+?);.*$/", "\\1", $FILE_TYPE );
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//-------------------------------------------------
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// Naughty Mozilla likes to use "none" to indicate an empty upload field.
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// I love universal languages that aren't universal.
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//-------------------------------------------------
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if ($_FILES[ $this->upload_form_field ]['name'] == ""
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or !$_FILES[ $this->upload_form_field ]['name']
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or !$_FILES[ $this->upload_form_field ]['size']
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or ($_FILES[ $this->upload_form_field ]['name'] == "none") )
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{
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$this->error_no = 1;
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return;
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}
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//-------------------------------------------------
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// De we have allowed file_extensions?
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//-------------------------------------------------
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if ( ! is_array( $this->allowed_file_ext ) or ! count( $this->allowed_file_ext ) )
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{
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$this->error_no = 2;
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return;
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}
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//-------------------------------------------------
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// Get file extension
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//-------------------------------------------------
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$this->file_extension = $this->_get_file_extension( $FILE_NAME );
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if ( ! $this->file_extension )
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{
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$this->error_no = 2;
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return;
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}
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$this->real_file_extension = $this->file_extension;
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//-------------------------------------------------
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// Valid extension?
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//-------------------------------------------------
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if ( ! in_array( $this->file_extension, $this->allowed_file_ext ) )
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{
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$this->error_no = 2;
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return;
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}
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//-------------------------------------------------
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// Check the file size
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//-------------------------------------------------
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if ( ( $this->max_file_size ) and ( $FILE_SIZE > $this->max_file_size ) )
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{
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$this->error_no = 3;
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return;
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}
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//-------------------------------------------------
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// Make the uploaded file safe
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//-------------------------------------------------
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$FILE_NAME = preg_replace( "/[^\w\.]/", "_", $FILE_NAME );
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$this->original_file_name = $FILE_NAME;
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//-------------------------------------------------
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// Convert file name?
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// In any case, file name is WITHOUT extension
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//-------------------------------------------------
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if ( $this->out_file_name )
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{
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$this->parsed_file_name = $this->out_file_name;
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}
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else
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{
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$this->parsed_file_name = preg_replace( '#\.'.$this->file_extension."#is", "", $FILE_NAME );
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}
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//-------------------------------------------------
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// Make safe?
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//-------------------------------------------------
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if ( $this->make_script_safe )
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{
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if ( preg_match( "/\.(cgi|pl|js|asp|php|html|htm|jsp|jar)/", $FILE_NAME ) )
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{
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$FILE_TYPE = 'text/plain';
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$this->file_extension = 'txt';
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}
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}
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//-------------------------------------------------
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// Is it an image?
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//-------------------------------------------------
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if ( is_array( $this->image_ext ) and count( $this->image_ext ) )
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{
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if ( in_array( $this->file_extension, $this->image_ext ) )
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{
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$this->is_image = 1;
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}
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}
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//-------------------------------------------------
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// Add on the extension...
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//-------------------------------------------------
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if ( $this->force_data_ext and ! $this->is_image )
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{
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$this->file_extension = str_replace( ".", "", $this->force_data_ext );
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}
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$this->parsed_file_name .= '.'.$this->file_extension;
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//-------------------------------------------------
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// Copy the upload to the uploads directory
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// ^^ We need to do this before checking the img
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// size for the openbasedir restriction peeps
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// We'll just unlink if it doesn't checkout
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//-------------------------------------------------
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$this->saved_upload_name = $this->out_file_dir.'/'.$this->parsed_file_name;
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if ( ! @move_uploaded_file( $_FILES[ $this->upload_form_field ]['tmp_name'], $this->saved_upload_name) )
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{
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$this->error_no = 4;
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return;
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}
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else
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{
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@chmod( $this->saved_upload_name, 0777 );
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}
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//-------------------------------------------------
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// Is it an image?
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//-------------------------------------------------
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if ( $this->is_image )
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{
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//-------------------------------------------------
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// Are we making sure its an image?
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//-------------------------------------------------
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if ( $this->image_check )
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{
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$img_attributes = @getimagesize( $this->saved_upload_name );
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if ( ! is_array( $img_attributes ) or ! count( $img_attributes ) )
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{
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// Unlink the file first
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@unlink( $this->saved_upload_name );
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$this->error_no = 5;
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return;
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}
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else if ( ! $img_attributes[2] )
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{
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// Unlink the file first
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@unlink( $this->saved_upload_name );
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$this->error_no = 5;
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return;
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}
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else if ( $img_attributes[2] == 1 AND ( $this->file_extension == 'jpg' OR $this->file_extension == 'jpeg' ) )
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{
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// Potential XSS attack with a fake GIF header in a JPEG
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@unlink( $this->saved_upload_name );
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$this->error_no = 5;
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return;
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}
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}
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}
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}
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/*-------------------------------------------------------------------------*/
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// INTERNAL: Get file extension
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/*-------------------------------------------------------------------------*/
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/**
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* Returns the file extension of the current filename
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*
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* @param string Filename
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*/
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function _get_file_extension($file)
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{
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return strtolower( str_replace( ".", "", substr( $file, strrpos( $file, '.' ) ) ) );
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}
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/*-------------------------------------------------------------------------*/
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// INTERNAL: Clean paths
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/*-------------------------------------------------------------------------*/
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/**
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* Trims off trailing slashes
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*
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*/
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function _clean_paths()
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{
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$this->out_file_dir = preg_replace( "#/$#", "", $this->out_file_dir );
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}
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}
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?>
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