/halogy/helpers/security_helper.php

  1<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
  2/**
  3 * CodeIgniter
  4 *
  5 * An open source application development framework for PHP 4.3.2 or newer
  6 *
  7 * @package		CodeIgniter
  8 * @author		ExpressionEngine Dev Team
  9 * @copyright	Copyright (c) 2008 - 2009, EllisLab, Inc.
 10 * @license		http://codeigniter.com/user_guide/license.html
 11 * @link		http://codeigniter.com
 12 * @since		Version 1.0
 13 * @filesource
 14 */
 15
 16// ------------------------------------------------------------------------
 17
 18/**
 19 * CodeIgniter Security Helpers
 20 *
 21 * @package		CodeIgniter
 22 * @subpackage	Helpers
 23 * @category	Helpers
 24 * @author		ExpressionEngine Dev Team
 25 * @link		http://codeigniter.com/user_guide/helpers/security_helper.html
 26 */
 27
 28// ------------------------------------------------------------------------
 29
 30/**
 31 * XSS Filtering
 32 *
 33 * @access	public
 34 * @param	string
 35 * @param	bool	whether or not the content is an image file
 36 * @return	string
 37 */	
 38if ( ! function_exists('xss_clean'))
 39{
 40	function xss_clean($str, $is_image = FALSE)
 41	{
 42		$CI =& get_instance();
 43		return $CI->input->xss_clean($str, $is_image);
 44	}
 45}
 46
 47// --------------------------------------------------------------------
 48
 49/**
 50 * Hash encode a string
 51 *
 52 * @access	public
 53 * @param	string
 54 * @return	string
 55 */	
 56if ( ! function_exists('dohash'))
 57{	
 58	function dohash($str, $type = 'sha1')
 59	{
 60		if ($type == 'sha1')
 61		{
 62			if ( ! function_exists('sha1'))
 63			{
 64				if ( ! function_exists('mhash'))
 65				{	
 66					require_once(BASEPATH.'libraries/Sha1'.EXT);
 67					$SH = new CI_SHA;
 68					return $SH->generate($str);
 69				}
 70				else
 71				{
 72					return bin2hex(mhash(MHASH_SHA1, $str));
 73				}
 74			}
 75			else
 76			{
 77				return sha1($str);
 78			}	
 79		}
 80		else
 81		{
 82			return md5($str);
 83		}
 84	}
 85}
 86	
 87// ------------------------------------------------------------------------
 88
 89/**
 90 * Strip Image Tags
 91 *
 92 * @access	public
 93 * @param	string
 94 * @return	string
 95 */	
 96if ( ! function_exists('strip_image_tags'))
 97{
 98	function strip_image_tags($str)
 99	{
100		$str = preg_replace("#<img\s+.*?src\s*=\s*[\"'](.+?)[\"'].*?\>#", "\\1", $str);
101		$str = preg_replace("#<img\s+.*?src\s*=\s*(.+?).*?\>#", "\\1", $str);
102			
103		return $str;
104	}
105}
106	
107// ------------------------------------------------------------------------
108
109/**
110 * Convert PHP tags to entities
111 *
112 * @access	public
113 * @param	string
114 * @return	string
115 */	
116if ( ! function_exists('encode_php_tags'))
117{
118	function encode_php_tags($str)
119	{
120		return str_replace(array('<?php', '<?PHP', '<?', '?>'),  array('&lt;?php', '&lt;?PHP', '&lt;?', '?&gt;'), $str);
121	}
122}
123
124
125/* End of file security_helper.php */
126/* Location: ./system/helpers/security_helper.php */