/usr/share/php/Text/CAPTCHA/Driver/Figlet.php is in php-text-captcha 0.4.3-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/**
* Require Figlet class for rendering the text.
*/
require_once 'Text/CAPTCHA.php';
require_once 'Text/Figlet.php';
/**
* Text_CAPTCHA_Driver_Figlet - Text_CAPTCHA driver Figlet based CAPTCHAs
*
* @author Aaron Wormus <wormus@php.net>
* @author Christian Wenz <wenz@php.net>
* @license BSD License
* @todo define an obfuscation algorithm
*/
class Text_CAPTCHA_Driver_Figlet extends Text_CAPTCHA
{
/**
* Text_Figlet object
*
* @access private
* @var resource
*/
var $_fig;
/**
* Width of CAPTCHA
*
* @access private
* @var int
*/
var $_width;
/**
* Figlet output string
*
* @access private
* @var string
*/
var $_output_string;
/**
* Figlet font options
*
* @access private
* @var array
*/
var $_fonts = array();
/**
* Figlet font
*
* @access private
* @var string
*/
var $_font;
/**
* Figlet font
*
* @access private
* @var array
*/
var $_style = array();
/**
* Output Format
*
* @access private
* @var string
*/
var $_output;
/**
* Last error
*
* @access protected
* @var PEAR_Error
*/
var $_error = null;
/**
* init function
*
* Initializes the new Text_CAPTCHA_Driver_Figlet object and creates a GD image
*
* @param array $options CAPTCHA options
* @access public
* @return mixed true upon success, PEAR error otherwise
*/
function init($options = array())
{
if (is_array($options)) {
if (!empty($options['output'])) {
$this->_output = $options['output'];
} else {
$this->_output = 'html';
}
if (isset($options['width']) && is_int($options['width'])) {
$this->_width = $options['width'];
} else {
$this->_width = 200;
}
if (!empty($options['length'])) {
$this->_length = $options['length'];
} else {
$this->_length = 6;
}
if (!isset($options['phrase']) || empty($options['phrase'])) {
$phraseoptions = (isset($options['phraseOptions']) && is_array($options['phraseOptions'])) ? $options['phraseOptions'] : array();
$this->_createPhrase($phraseoptions);
} else {
$this->_phrase = $options['phrase'];
}
}
if (!isset($options['options']) || empty($options['options']) || !is_array($options['options'])) {
die;
} else {
if (isset($options['options']['style']) && !empty($options['options']['style']) && is_array($options['options']['style'])) {
$this->_style = $options['options']['style'];
}
if (!isset($this->_style['padding']) || empty($this->_style['padding'])) {
$this->_style['padding'] = '5px';
}
if (isset($options['options']['font_file']) && !empty($options['options']['font_file'])) {
if (is_array($options['options']['font_file'])) {
$this->_font = $options['options']['font_file'][array_rand($options['options']['font_file'])];
} else {
$this->_font = $options['options']['font_file'];
}
}
}
}
/**
* Create random CAPTCHA phrase
* This method creates a random phrase
*
* @param array $options Optionally supply advanced options for the phase creation;
* used for the initialization of Text_Password
*
* @access private
* @return void
*/
function _createPhrase($options = array())
{
if (!is_array($options) || count($options) === 0) {
$this->_phrase = Text_Password::create($this->_length);
} else {
if (count($options) === 1) {
$this->_phrase = Text_Password::create($this->_length, $options[0]);
} else {
$this->_phrase = Text_Password::create($this->_length, $options[0], $options[1]);
}
}
}
/**
* Create CAPTCHA image
*
* This method creates a CAPTCHA image
*
* @access private
* @return void PEAR_Error on error
*/
function _createCAPTCHA()
{
$this->_fig = new Text_Figlet();
if (PEAR::isError($this->_fig->LoadFont($this->_font))) {
$this->_error = PEAR::raiseError('Error loading Text_Figlet font');
return $this->_error;
}
$this->_output_string = $this->_fig->LineEcho($this->_phrase);
}
/**
* Return CAPTCHA in the specified format
*
* This method returns the CAPTCHA depending on the output format
*
* @access public
* @return mixed Formatted captcha or PEAR error
*/
function getCAPTCHA()
{
$retval = $this->_createCAPTCHA();
if (PEAR::isError($retval)) {
return PEAR::raiseError($retval->getMessage());
}
switch ($this->_output) {
case 'text':
return $this->_output_string;
break;
case 'html':
return $this->getCAPTCHAAsHTML();
break;
case 'javascript':
return $this->getCAPTCHAAsJavascript();
break;
}
}
/**
* Return CAPTCHA as HTML
*
* This method returns the CAPTCHA as HTML
*
* @access public
* @return mixed HTML Figlet image or PEAR error
*/
function getCAPTCHAAsHTML()
{
$retval = $this->_createCAPTCHA();
if (PEAR::isError($retval)) {
return PEAR::raiseError($retval->getMessage());
}
$charwidth = strpos($this->_output_string, "\n");
$data = str_replace("\n", '<br />', $this->_output_string);
$textsize = ($this->_width / $charwidth) * 1.4;
$css_output = "";
foreach ($this->_style as $key => $value) {
$css_output .= "$key: $value;";
}
$htmloutput = '<div style="font-family: courier;
font-size: '.$textsize.'px;
width:'.$this->_width.'px;
text-align:center;">';
$htmloutput .= '<div style="'.$css_output.'margin:0px;">
<pre style="padding: 0px; margin: 0px;">'. $data. '</pre></div></div>';
return $htmloutput;
}
/**
* Return CAPTCHA as JavaScript version of HTML
*
* This method returns the CAPTCHA as a JavaScript string
* I'm not exactly sure what the point of doing this would be.
*
* @access public
* @return mixed JavaScript string or PEAR error
*/
function getCAPTCHAAsJavascript()
{
$data = $this->getCAPTCHAAsHTML();
if (PEAR::isError($data)) {
return PEAR::raiseError($data->getMessage());
}
$obfus_data = rawurlencode($data);
$javascript = "<script type=\"text/javascript\">
document.write(unescape(\"${obfus_data}\"));
</script>";
return $javascript;
}
}
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