added Security class docs, cleaned up Input class for changes to both

3 files changed, 176 insertions, 30 deletions

diff --git a/user_guide/libraries/input.html b/user_guide/libraries/input.html
index 59198a245..055f12bf4 100644
--- a/user_guide/libraries/input.html
+++ b/user_guide/libraries/input.html
@@ -42,7 +42,7 @@
 <td id="breadcrumb">
 <a href="http://codeigniter.com/">CodeIgniter Home</a> &nbsp;&#8250;&nbsp;
 <a href="../index.html">User Guide Home</a> &nbsp;&#8250;&nbsp;
-Input and Security Class
+Input Class
 </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&nbsp; <input type="text" class="input" style="width:200px;" name="q" id="q" size="31" maxlength="255" value="" />&nbsp;<input type="submit" class="submit" name="sa" value="Go" /></form></td>
 </tr>
@@ -83,38 +83,12 @@ Input and Security Class
 
 <h2>XSS Filtering</h2>
 
-<p>CodeIgniter comes with a Cross Site Scripting Hack prevention filter which can either run automatically to filter
-all POST and COOKIE data that is encountered, or you can run it on a per item basis.  By default it does <strong>not</strong>
-run globally since it requires a bit of processing overhead, and since you may not need it in all cases.</p>
-
-<p>The XSS filter looks for commonly used techniques to trigger Javascript or other types of code that attempt to hijack cookies
-or do other malicious things.  If anything disallowed is encountered it is rendered safe by converting the data to character entities.</p>
-
-<p>
-Note: This function should only be used to deal with data upon submission. It's not something that should be used for general runtime processing since it requires a fair amount of processing overhead.</p>
-
-
-<p>To filter data through the XSS filter use this function:</p>
-
-<h2>$this->input->xss_clean()</h2>
-
-<p>Here is an usage example:</p>
-
-<code>$data = $this->input->xss_clean($data);</code>
-
-<p>If you want the filter to run automatically every time it encounters POST or COOKIE data you can enable it by opening your
+<p>The Input class has the ability to filter input automatically to prevent cross-site scripting attacks.  If you want the filter to run automatically every time it encounters POST or COOKIE data you can enable it by opening your
 <kbd>application/config/config.php</kbd> file and setting this:</p>
 
 <code>$config['global_xss_filtering'] = TRUE;</code>
 
-<p>Note: If you use the form validation class, it gives you the option of XSS filtering as well.</p>
-
-<p>An optional second parameter, <dfn>is_image</dfn>, allows this function to be used to test images for potential XSS attacks, useful for file upload security.  When this second parameter is set to <dfn>TRUE</dfn>, instead of returning an altered string, the function returns TRUE if the image is safe, and FALSE if it contained potentially malicious information that a browser may attempt to execute.</p>
-
-<code>if ($this->input->xss_clean($file, TRUE) === FALSE)<br />
-{<br />
-&nbsp;&nbsp;&nbsp;&nbsp;// file failed the XSS test<br />
-}</code>
+<p>Please refer to the <a href="security.html">Security class</a> documentation for information on using XSS Filtering in your application.</p>
 
 
 <h2>Using POST, COOKIE, or SERVER Data</h2>
@@ -183,6 +157,55 @@ else<br />
 <code>$this->input->server('some_data');</code>
 
 
+<h2>$this->input->set_cookie()</h2>
+
+<p>Sets a cookie containing the values you specify.  There are two ways to pass information to this function so that a cookie can be set:
+Array Method, and Discrete Parameters:</p>
+
+<h4>Array Method</h4>
+
+<p>Using this method, an associative array is passed to the first parameter:</p>
+
+<code>$cookie = array(<br />
+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;'name'&nbsp;&nbsp;&nbsp;=> 'The Cookie Name',<br />
+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;'value'&nbsp;&nbsp;=> 'The Value',<br />
+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;'expire' => '86500',<br />
+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;'domain' => '.some-domain.com',<br />
+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;'path'&nbsp;&nbsp;&nbsp;=> '/',<br />
+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;'prefix' => 'myprefix_',<br />
+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;);<br />
+<br />
+$this->input->set_cookie($cookie);
+</code>
+
+<p><strong>Notes:</strong></p>
+
+<p>Only the name and value are required. To delete a cookie set it with the expiration blank.</p>
+
+<p>The expiration is set in <strong>seconds</strong>, which will be added to the current time.  Do not include the time, but rather only the
+number of seconds from <em>now</em> that you wish the cookie to be valid.  If the expiration is set to
+zero the cookie will only last as long as the browser is open.</p>
+<p>For site-wide cookies regardless of how your site is requested, add your URL to the <strong>domain</strong> starting with a period, like this:  .your-domain.com</p>
+<p>The path is usually not needed since the function sets a root path.</p>
+<p>The prefix is only needed if you need to avoid name collisions with other identically named cookies for your server.</p>
+
+<h4>Discrete Parameters</h4>
+
+<p>If you prefer, you can set the cookie by passing data using individual parameters:</p>
+
+<code>$this->input->set_cookie($name, $value, $expire, $domain, $path, $prefix);</code>
+
+<h2>$this->input->get_cookie()</h2>
+
+<p>Lets you fetch a cookie.  The first parameter will contain the name of the cookie you are looking for (including any prefixes):</p>
+
+<code>get_cookie('some_cookie');</code>
+
+<p>The function returns FALSE (boolean) if the item you are attempting to retrieve does not exist.</p>
+
+<p>The second optional parameter lets you run the data through the XSS filter.  It's enabled by setting the second parameter to boolean TRUE;</p>
+
+<p><code>get_cookie('some_cookie', TRUE);</code></p>
 
 
 <h2>$this->input->ip_address()</h2>
diff --git a/user_guide/libraries/security.html b/user_guide/libraries/security.html
new file mode 100644
index 000000000..d5d725381
--- /dev/null
+++ b/user_guide/libraries/security.html
@@ -0,0 +1,123 @@
+<!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 Class : 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 2.0.0</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> &nbsp;&#8250;&nbsp;
+<a href="../index.html">User Guide Home</a> &nbsp;&#8250;&nbsp;
+Security Class
+</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&nbsp; <input type="text" class="input" style="width:200px;" name="q" id="q" size="31" maxlength="255" value="" />&nbsp;<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 Class</h1>
+
+<p>The Security Class contains methods that help you create a secure application, processing input data for security.</p>
+
+<h2>XSS Filtering</h2>
+
+<p>CodeIgniter comes with a Cross Site Scripting Hack prevention filter which can either run automatically to filter
+all POST and COOKIE data that is encountered, or you can run it on a per item basis.  By default it does <strong>not</strong>
+run globally since it requires a bit of processing overhead, and since you may not need it in all cases.</p>
+
+<p>The XSS filter looks for commonly used techniques to trigger Javascript or other types of code that attempt to hijack cookies
+or do other malicious things.  If anything disallowed is encountered it is rendered safe by converting the data to character entities.</p>
+
+<p>
+Note: This function should only be used to deal with data upon submission. It's not something that should be used for general runtime processing since it requires a fair amount of processing overhead.</p>
+
+
+<p>To filter data through the XSS filter use this function:</p>
+
+<h2>$this->security->xss_clean()</h2>
+
+<p>Here is an usage example:</p>
+
+<code>$data = $this->security->xss_clean($data);</code>
+
+<p>If you want the filter to run automatically every time it encounters POST or COOKIE data you can enable it by opening your
+<kbd>application/config/config.php</kbd> file and setting this:</p>
+
+<code>$config['global_xss_filtering'] = TRUE;</code>
+
+<p>Note: If you use the form validation class, it gives you the option of XSS filtering as well.</p>
+
+<p>An optional second parameter, <dfn>is_image</dfn>, allows this function to be used to test images for potential XSS attacks, useful for file upload security.  When this second parameter is set to <dfn>TRUE</dfn>, instead of returning an altered string, the function returns TRUE if the image is safe, and FALSE if it contained potentially malicious information that a browser may attempt to execute.</p>
+
+<code>if ($this->security->xss_clean($file, TRUE) === FALSE)<br />
+{<br />
+&nbsp;&nbsp;&nbsp;&nbsp;// file failed the XSS test<br />
+}</code>
+
+
+<h2>$this->security->sanitize_filename()</h2>
+
+<p>When accepting filenames from user input, it is best to sanitize them to prevent directory traversal and other security related issues.  To do so, use the <dfn>sanitize_filename()</dfn> method of the Security class.  Here is an example:</p>
+
+<code>$filename = $this->security->sanitize_filename($this->input->post('filename'));</code>
+
+<!-- @todo write docs for CSRF methods -->
+
+</div>
+<!-- END CONTENT -->
+
+
+<div id="footer">
+<p>
+Previous Topic:&nbsp;&nbsp;<a href="pagination.html">Pagination Class</a>
+&nbsp;&nbsp;&nbsp;&middot;&nbsp;&nbsp;
+<a href="#top">Top of Page</a>&nbsp;&nbsp;&nbsp;&middot;&nbsp;&nbsp;
+<a href="../index.html">User Guide Home</a>&nbsp;&nbsp;&nbsp;&middot;&nbsp;&nbsp;
+Next Topic:&nbsp;&nbsp;<a href="sessions.html">Session Class</a>
+</p>
+<p><a href="http://codeigniter.com">CodeIgniter</a> &nbsp;&middot;&nbsp; Copyright &#169; 2006-2010 &nbsp;&middot;&nbsp; <a href="http://ellislab.com/">Ellislab, Inc.</a></p>
+</div>
+
+</body>
+</html>
\ No newline at end of file
diff --git a/user_guide/libraries/sessions.html b/user_guide/libraries/sessions.html
index 059f6fbc6..31b4047e5 100644
--- a/user_guide/libraries/sessions.html
+++ b/user_guide/libraries/sessions.html
@@ -298,7 +298,7 @@ do not need to write your own routine to do it.</p>
 
 <div id="footer">
 <p>
-Previous Topic:&nbsp;&nbsp;<a href="pagination.html">Pagination Class</a>
+Previous Topic:&nbsp;&nbsp;<a href="security.html">Security Class</a>
 &nbsp;&nbsp;&nbsp;&middot;&nbsp;&nbsp;
 <a href="#top">Top of Page</a>&nbsp;&nbsp;&nbsp;&middot;&nbsp;&nbsp;
 <a href="../index.html">User Guide Home</a>&nbsp;&nbsp;&nbsp;&middot;&nbsp;&nbsp;