164 lines
6.0 KiB
HTML
164 lines
6.0 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
|
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
|
<head>
|
|
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
|
<title>Security : CodeIgniter User Guide</title>
|
|
|
|
<style type='text/css' media='all'>@import url('../userguide.css');</style>
|
|
<link rel='stylesheet' type='text/css' media='all' href='../userguide.css' />
|
|
|
|
<script type="text/javascript" src="../nav/nav.js"></script>
|
|
<script type="text/javascript" src="../nav/prototype.lite.js"></script>
|
|
<script type="text/javascript" src="../nav/moo.fx.js"></script>
|
|
<script type="text/javascript" src="../nav/user_guide_menu.js"></script>
|
|
|
|
<meta http-equiv='expires' content='-1' />
|
|
<meta http-equiv= 'pragma' content='no-cache' />
|
|
<meta name='robots' content='all' />
|
|
<meta name='author' content='ExpressionEngine Dev Team' />
|
|
<meta name='description' content='CodeIgniter User Guide' />
|
|
|
|
</head>
|
|
<body>
|
|
|
|
<!-- START NAVIGATION -->
|
|
<div id="nav"><div id="nav_inner"><script type="text/javascript">create_menu('../');</script></div></div>
|
|
<div id="nav2"><a name="top"></a><a href="javascript:void(0);" onclick="myHeight.toggle();"><img src="../images/nav_toggle_darker.jpg" width="154" height="43" border="0" title="Toggle Table of Contents" alt="Toggle Table of Contents" /></a></div>
|
|
<div id="masthead">
|
|
<table cellpadding="0" cellspacing="0" border="0" style="width:100%">
|
|
<tr>
|
|
<td><h1>CodeIgniter User Guide Version 2.1.3</h1></td>
|
|
<td id="breadcrumb_right"><a href="../toc.html">Table of Contents Page</a></td>
|
|
</tr>
|
|
</table>
|
|
</div>
|
|
<!-- END NAVIGATION -->
|
|
|
|
|
|
<!-- START BREADCRUMB -->
|
|
<table cellpadding="0" cellspacing="0" border="0" style="width:100%">
|
|
<tr>
|
|
<td id="breadcrumb">
|
|
<a href="http://codeigniter.com/">CodeIgniter Home</a> ›
|
|
<a href="../index.html">User Guide Home</a> ›
|
|
Security
|
|
</td>
|
|
<td id="searchbox"><form method="get" action="http://www.google.com/search"><input type="hidden" name="as_sitesearch" id="as_sitesearch" value="codeigniter.com/user_guide/" />Search User Guide <input type="text" class="input" style="width:200px;" name="q" id="q" size="31" maxlength="255" value="" /> <input type="submit" class="submit" name="sa" value="Go" /></form></td>
|
|
</tr>
|
|
</table>
|
|
<!-- END BREADCRUMB -->
|
|
|
|
<br clear="all" />
|
|
|
|
|
|
<!-- START CONTENT -->
|
|
<div id="content">
|
|
|
|
<h1>Security</h1>
|
|
|
|
<p>This page describes some "best practices" regarding web security, and details
|
|
CodeIgniter's internal security features.</p>
|
|
|
|
|
|
<h2>URI Security</h2>
|
|
|
|
<p>CodeIgniter is fairly restrictive regarding which characters it allows in your URI strings in order to help
|
|
minimize the possibility that malicious data can be passed to your application. URIs may only contain the following:
|
|
</p>
|
|
|
|
<ul>
|
|
<li>Alpha-numeric text</li>
|
|
<li>Tilde: ~ </li>
|
|
<li>Period: .</li>
|
|
<li>Colon: :</li>
|
|
<li>Underscore: _</li>
|
|
<li>Dash: -</li>
|
|
</ul>
|
|
|
|
<h2>Register_globals</h2>
|
|
|
|
<p>During system initialization all global variables are unset, except those found in the $_GET, $_POST, and $_COOKIE arrays. The unsetting
|
|
routine is effectively the same as register_globals = off.</p>
|
|
|
|
<a name="error_reporting"></a>
|
|
<h2>error_reporting</h2>
|
|
|
|
<p>
|
|
In production environments, it is typically desirable to disable PHP's
|
|
error reporting by setting the internal error_reporting flag to a value of 0. This disables native PHP
|
|
errors from being rendered as output, which may potentially contain
|
|
sensitive information.
|
|
</p>
|
|
|
|
<p>
|
|
Setting CodeIgniter's <kbd>ENVIRONMENT</kbd> constant in index.php to a
|
|
value of '<kbd>production</kbd>' will turn off these errors. In development
|
|
mode, it is recommended that a value of '<kbd>development</kbd>' is used.
|
|
More information about differentiating between environments can be found
|
|
on the <a href="environments.html">Handling Environments</a> page.
|
|
</p>
|
|
|
|
<h2>magic_quotes_runtime</h2>
|
|
|
|
<p>The magic_quotes_runtime directive is turned off during system initialization so that you don't have to remove slashes when
|
|
retrieving data from your database.</p>
|
|
|
|
<h1>Best Practices</h1>
|
|
|
|
<p>Before accepting any data into your application, whether it be POST data from a form submission, COOKIE data, URI data,
|
|
XML-RPC data, or even data from the SERVER array, you are encouraged to practice this three step approach:</p>
|
|
|
|
<ol>
|
|
<li>Filter the data as if it were tainted.</li>
|
|
<li>Validate the data to ensure it conforms to the correct type, length, size, etc. (sometimes this step can replace step one)</li>
|
|
<li>Escape the data before submitting it into your database.</li>
|
|
</ol>
|
|
|
|
<p>CodeIgniter provides the following functions to assist in this process:</p>
|
|
|
|
<ul>
|
|
|
|
<li><h2>XSS Filtering</h2>
|
|
|
|
<p>CodeIgniter comes with a Cross Site Scripting filter. This filter looks for commonly
|
|
used techniques to embed malicious Javascript into your data, or other types of code that attempt to hijack cookies
|
|
or do other malicious things. The XSS Filter is described <a href="../libraries/security.html">here</a>.
|
|
</p>
|
|
</li>
|
|
|
|
<li><h2>Validate the data</h2>
|
|
|
|
<p>CodeIgniter has a <a href="../libraries/form_validation.html">Form Validation Class</a> that assists you in validating, filtering, and prepping
|
|
your data.</p>
|
|
</li>
|
|
|
|
<li><h2>Escape all data before database insertion</h2>
|
|
|
|
<p>Never insert information into your database without escaping it. Please see the section that discusses
|
|
<a href="../database/queries.html">queries</a> for more information.</p>
|
|
|
|
</li>
|
|
|
|
</ul>
|
|
|
|
|
|
|
|
|
|
</div>
|
|
<!-- END CONTENT -->
|
|
|
|
|
|
<div id="footer">
|
|
<p>
|
|
Previous Topic: <a href="alternative_php.html">Alternative PHP</a>
|
|
·
|
|
<a href="#top">Top of Page</a> ·
|
|
<a href="../index.html">User Guide Home</a> ·
|
|
Next Topic: <a href="styleguide.html">PHP Style Guide</a>
|
|
</p>
|
|
<p><a href="http://codeigniter.com">CodeIgniter</a> · Copyright © 2006 - 2012 · <a href="http://ellislab.com/">EllisLab, Inc.</a></p>
|
|
</div>
|
|
|
|
</body>
|
|
</html> |