Actualización

main/inc/lib/pear/Text/CAPTCHA/Driver/Base.php

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+<?php
+/**
+ * Base class file for all Text_CAPTCHA drivers.
+ *
+ * PHP version 5
+ *
+ * @category Text
+ * @package  Text_CAPTCHA
+ * @author   Michael Cramer <michael@bigmichi1.de>
+ * @license  http://www.opensource.org/licenses/bsd-license.php BSD License
+ * @link     http://pear.php.net/package/Text_CAPTCHA
+ */
+
+/**
+ * Base class file for all Text_CAPTCHA drivers.
+ *
+ * @category Text
+ * @package  Text_CAPTCHA
+ * @author   Michael Cramer <michael@bigmichi1.de>
+ * @license  http://www.opensource.org/licenses/bsd-license.php BSD License
+ * @link     http://pear.php.net/package/Text_CAPTCHA
+ */
+abstract class Text_CAPTCHA_Driver_Base implements Text_CAPTCHA_Driver
+{
+    /**
+     * Captcha
+     *
+     * @var object|string
+     */
+    private $_captcha;
+
+    /**
+     * Phrase
+     *
+     * @var string
+     */
+    private $_phrase;
+
+    /**
+     * Sets secret CAPTCHA phrase.
+     * This method sets the CAPTCHA phrase (use null for a random phrase)
+     *
+     * @param string $phrase The (new) phrase
+     *
+     * @return void
+     */
+    public final function setPhrase($phrase)
+    {
+        $this->_phrase = $phrase;
+    }
+
+    /**
+     * Return secret CAPTCHA phrase
+     * This method returns the CAPTCHA phrase
+     *
+     * @return  string   secret phrase
+     */
+    public final function getPhrase()
+    {
+        return $this->_phrase;
+    }
+
+    /**
+     * Sets the generated captcha.
+     *
+     * @param object|string $captcha the generated captcha
+     *
+     * @return void
+     */
+    protected final function setCaptcha($captcha)
+    {
+        $this->_captcha = $captcha;
+    }
+
+    /**
+     * Place holder for the real getCAPTCHA() method
+     * used by extended classes to return the generated CAPTCHA
+     * (as an image resource, as an ASCII text, ...)
+     *
+     * @return string|object
+     */
+    public final function getCAPTCHA()
+    {
+        return $this->_captcha;
+    }
+
+    /**
+     * Reset the phrase and the CAPTCHA.
+     *
+     * @return void
+     */
+    public function resetDriver()
+    {
+        $this->setPhrase(null);
+        $this->setCaptcha(null);
+    }
+}

main/inc/lib/pear/Text/CAPTCHA/Driver/Equation.php

@@ -0,0 +1,215 @@
+<?php
+/**
+ * Equation driver for Text_CAPTCHA.
+ * Returns simple equations as string, e.g. "9 - 2"
+ *
+ * PHP version 5
+ *
+ * @category Text
+ * @package  Text_CAPTCHA
+ * @author   Christian Weiske <cweiske@php.net>
+ * @author   Christian Wenz <wenz@php.net>
+ * @author   Michael Cramer <michael@bigmichi1.de>
+ * @license  http://www.opensource.org/licenses/bsd-license.php BSD License
+ * @link     http://pear.php.net/package/Text_CAPTCHA
+ */
+
+/**
+ * Equation driver for Text_CAPTCHA.
+ * Returns simple equations as string, e.g. "9 - 2"
+ *
+ * @category Text
+ * @package  Text_CAPTCHA
+ * @author   Christian Weiske <cweiske@php.net>
+ * @author   Christian Wenz <wenz@php.net>
+ * @author   Michael Cramer <michael@bigmichi1.de>
+ * @license  http://www.opensource.org/licenses/bsd-license.php BSD License
+ * @link     http://pear.php.net/package/Text_CAPTCHA
+ */
+class Text_CAPTCHA_Driver_Equation extends Text_CAPTCHA_Driver_Base
+{
+    /**
+     * Operators that may be used in the equation. Two numbers have to be filled in,
+     * and %s is needed since number2text conversion may be applied and strings
+     * filled in.
+     *
+     * @var array
+     */
+    private $_operators = array(
+        '%s * %s',
+        '%s + %s',
+        '%s - %s',
+        'min(%s, %s)',
+        'max(%s, %s)'
+    );
+
+    /**
+     * Minimal number to use in an equation.
+     *
+     * @var int
+     */
+    private $_min = 1;
+
+    /**
+     * Maximum number to use in an equation.
+     *
+     * @var int
+     */
+    private $_max = 10;
+
+    /**
+     * Whether numbers shall be converted to text.
+     *
+     * @var bool
+     */
+    private $_numbersToText = false;
+
+    /**
+     * This variable holds the locale for Numbers_Words.
+     *
+     * @var string
+     */
+    private $_locale = '';
+
+    /**
+     * Complexity of the generated equations.<br>
+     * 1 - simple ones such as "1 + 10"<br>
+     * 2 - harder ones such as "(3-2)*(min(5,6))"
+     *
+     * @var int
+     */
+    private $_severity = 1;
+
+    /**
+     * Initialize the driver.
+     *
+     * @param array $options CAPTCHA options with these keys:<br>
+     *                       min           minimum numeric value
+     *                       max           maximum numeric value
+     *                       numbersToText boolean for number to text conversion
+     *                       locale        locale for number to text conversion
+     *                       severity      number for complexity
+     *
+     * @return void
+     * @throws Text_CAPTCHA_Exception when numbersToText is true, but Number_Words
+     *                                package is not available
+     */
+    public function initDriver($options = array())
+    {
+        if (isset($options['min'])) {
+            $this->_min = (int)$options['min'];
+        } else {
+            $this->_min = 1;
+        }
+        if (isset($options['max'])) {
+            $this->_max = (int)$options['max'];
+        } else {
+            $this->_max = 10;
+        }
+        if (isset($options['numbersToText'])) {
+            $this->_numbersToText = (bool)$options['numbersToText'];
+        } else {
+            $this->_numbersToText = false;
+        }
+        if (isset($options['locale'])) {
+            $this->_locale = (string)$options['locale'];
+        } else {
+            $this->_locale = '';
+        }
+        if (isset($options['severity'])) {
+            $this->_severity = (int)$options['severity'];
+        } else {
+            $this->_severity = 1;
+        }
+
+        if ($this->_numbersToText) {
+            include_once 'Numbers/Words.php';
+            if (!class_exists('Numbers_Words')) {
+                throw new Text_CAPTCHA_Exception('Number_Words package required');
+            }
+        }
+    }
+
+    /**
+     * Create random CAPTCHA equation.
+     * This method creates a random equation.
+     *
+     * @return void
+     * @throws Text_CAPTCHA_Exception when invalid severity is specified
+     */
+    public function createCAPTCHA()
+    {
+        switch ($this->_severity) {
+        case 1:
+            list($equation, $phrase) = $this->_createSimpleEquation();
+            break;
+        case 2:
+            list($eq1, $sol1) = $this->_createSimpleEquation();
+            list($eq2, $sol2) = $this->_createSimpleEquation();
+            $op3 = $this->_operators[mt_rand(0, count($this->_operators) - 1)];
+            list(, $phrase) = $this->_solveSimpleEquation($sol1, $sol2, $op3);
+            $equation = sprintf($op3, '(' . $eq1 . ')', '(' . $eq2 . ')');
+            break;
+        default:
+            throw new Text_CAPTCHA_Exception(
+                'Equation complexity of ' . $this->_severity . ' not supported'
+            );
+        }
+        $this->setCaptcha($equation);
+        $this->setPhrase($phrase);
+    }
+
+    /**
+     * Creates a simple equation of type (number operator number).
+     *
+     * @return array Array with equation and solution
+     */
+    private function _createSimpleEquation()
+    {
+        $one = mt_rand($this->_min, $this->_max);
+        $two = mt_rand($this->_min, $this->_max);
+        $operator = $this->_operators[mt_rand(0, count($this->_operators) - 1)];
+
+        return $this->_solveSimpleEquation($one, $two, $operator);
+    }
+
+    /**
+     * Solves a simple equation with two given numbers and one operator as defined
+     * in $this->_operators.
+     * Also converts the numbers to words if required.
+     *
+     * @param int    $one      First number
+     * @param int    $two      Second number
+     * @param string $operator Operator used with those two numbers
+     *
+     * @return array    Array with equation and solution
+     */
+    private function _solveSimpleEquation($one, $two, $operator)
+    {
+        $equation = sprintf($operator, $one, $two);
+
+        $function = create_function('', 'return ' . $equation . ';');
+
+        if ($this->_numbersToText) {
+            $numberWords = new Numbers_Words();
+            $equation = sprintf(
+                $operator,
+                $numberWords->toWords($one, $this->_locale),
+                $numberWords->toWords($two, $this->_locale)
+            );
+        }
+        return array($equation, $function());
+    }
+
+    /**
+     * Creates the captcha. This method is a placeholder, since the equation is
+     * created in createCAPTCHA()
+     *
+     * @return void
+     * @see createCAPTCHA()
+     */
+    public function createPhrase()
+    {
+        $this->setPhrase(null);
+    }
+}

main/inc/lib/pear/Text/CAPTCHA/Driver/Figlet.php

@@ -0,0 +1,231 @@
+<?php
+/**
+ * Require Figlet class for rendering the text.
+ *
+ * PHP version 5
+ *
+ * @category Text
+ * @package  Text_CAPTCHA
+ * @author   Aaron Wormus <wormus@php.net>
+ * @author   Christian Wenz <wenz@php.net>
+ * @author   Michael Cramer <michael@bigmichi1.de>
+ * @license  http://www.opensource.org/licenses/bsd-license.php BSD License
+ * @link     http://pear.php.net/package/Text_CAPTCHA
+ */
+/**
+ * Text_CAPTCHA_Driver_Figlet - Text_CAPTCHA driver Figlet based CAPTCHAs
+ *
+ * @category Text
+ * @package  Text_CAPTCHA
+ * @author   Aaron Wormus <wormus@php.net>
+ * @author   Christian Wenz <wenz@php.net>
+ * @license  http://www.opensource.org/licenses/bsd-license.php BSD License
+ * @link     http://pear.php.net/package/Text_CAPTCHA
+ * @todo     define an obfuscation algorithm
+ */
+class Text_CAPTCHA_Driver_Figlet extends Text_CAPTCHA_Driver_Base
+{
+    /**
+     * Text_Password options.
+     *
+     * @var array
+     */
+    private $_textPasswordOptions;
+
+    /**
+     * Width of CAPTCHA
+     *
+     * @var int
+     */
+    private $_width;
+
+    /**
+     * Length of CAPTCHA
+     *
+     * @var int
+     */
+    private $_length;
+
+    /**
+     * Figlet font
+     *
+     * @var string
+     */
+    private $_font;
+
+    /**
+     * Figlet font
+     *
+     * @var array
+     */
+    private $_style = array();
+
+    /**
+     * Output Format
+     *
+     * @var string
+     */
+    private $_output;
+
+    /**
+     * init function
+     *
+     * Initializes the new Text_CAPTCHA_Driver_Figlet object and creates a GD image
+     *
+     * @param array $options CAPTCHA options
+     *
+     * @return void
+     * @throws Text_CAPTCHA_Exception when no options are given
+     */
+    public function initDriver($options = array())
+    {
+        if (!empty($options['output'])) {
+            $this->_output = (string)$options['output'];
+        } else {
+            $this->_output = 'html';
+        }
+
+        if (isset($options['width']) && $options['width']) {
+            $this->_width = (int)$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->_textPasswordOptions = $phraseOptions;
+        } else {
+            $this->setPhrase($options['phrase']);
+        }
+
+        if (!empty($options['style'])
+            && is_array($options['style'])
+        ) {
+            $this->_style = $options['style'];
+        }
+
+        if (empty($this->_style['padding'])) {
+            $this->_style['padding'] = '5px';
+        }
+
+        if (!empty($options['font_file'])) {
+            if (is_array($options['font_file'])) {
+                $arr = $options['font_file'];
+                $this->_font = $arr[array_rand($arr)];
+            } else {
+                $this->_font = $options['font_file'];
+            }
+        }
+    }
+
+    /**
+     * Create the passphrase.
+     *
+     * @return string
+     */
+    public function createPhrase()
+    {
+        $options = $this->_textPasswordOptions;
+        $textPassword = new Text_Password();
+        if (!is_array($options) || count($options) === 0) {
+            $this->setPhrase($textPassword->create($this->_length));
+        } else {
+            if (count($options) === 1) {
+                $this->setPhrase($textPassword->create($this->_length, $options[0]));
+            } else {
+                $this->setPhrase(
+                    $textPassword->create($this->_length, $options[0], $options[1])
+                );
+            }
+        }
+    }
+
+    /**
+     * Create CAPTCHA image.
+     *
+     * This method creates a CAPTCHA image.
+     *
+     * @return void on error
+     * @throws Text_CAPTCHA_Exception when loading font fails
+     */
+    public function createCAPTCHA()
+    {
+        $pear = new PEAR();
+        $figlet = new Text_Figlet();
+        if ($pear->isError($figlet->loadFont($this->_font))) {
+            throw new Text_CAPTCHA_Exception('Error loading Text_Figlet font');
+        }
+
+        $outputString = $figlet->lineEcho($this->getPhrase());
+
+        switch ($this->_output) {
+        case 'text':
+            $this->setCaptcha($outputString);
+            break;
+        case 'html':
+            $this->setCaptcha($this->_getCAPTCHAAsHTML($outputString));
+            break;
+        case 'javascript':
+            $this->setCaptcha($this->_getCAPTCHAAsJavascript($outputString));
+            break;
+        default:
+            throw new Text_CAPTCHA_Exception('Invalid output option given');
+        }
+    }
+
+    /**
+     * Return CAPTCHA as HTML.
+     *
+     * This method returns the CAPTCHA as HTML.
+     *
+     * @param string $figletOutput output string from Figlet.
+     *
+     * @return string HTML Figlet image or PEAR error
+     */
+    private function _getCAPTCHAAsHTML($figletOutput)
+    {
+        $charWidth = strpos($figletOutput, "\n");
+        $data = str_replace("\n", '<br />', $figletOutput);
+        $textSize = ($this->_width / $charWidth) * 1.4;
+        $cssOutput = "";
+        foreach ($this->_style as $key => $value) {
+            $cssOutput .= "$key: $value;";
+        }
+
+        $htmlOutput = '<div style="font-family: courier;
+          font-size: ' . $textSize . 'px;
+          width:' . $this->_width . 'px;
+          text-align:center;">';
+        $htmlOutput .= '<div style="' . $cssOutput . '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.
+     *
+     * @param string $figletOutput output string from Figlet.
+     *
+     * @return string javascript string or PEAR error
+     */
+    private function _getCAPTCHAAsJavascript($figletOutput)
+    {
+        $obfusData = rawurlencode($figletOutput);
+        $javascript = "<script language=\"javascript\">
+          document.write(unescape(\"$obfusData\" ) );
+          </script>";
+        return $javascript;
+    }
+}

main/inc/lib/pear/Text/CAPTCHA/Driver/Image.php

@@ -0,0 +1,289 @@
+<?php
+/**
+ * Require Image_Text class for generating the text.
+ *
+ * PHP version 5
+ *
+ * @category Text
+ * @package  Text_CAPTCHA
+ * @author   Christian Wenz <wenz@php.net>
+ * @author   Michael Cramer <michael@bigmichi1.de>
+ * @license  http://www.opensource.org/licenses/bsd-license.php BSD License
+ * @link     http://pear.php.net/package/Text_CAPTCHA
+ */
+
+/**
+ * Text_CAPTCHA_Driver_Image - Text_CAPTCHA driver graphical CAPTCHAs
+ *
+ * Class to create a graphical Turing test
+ *
+ * @category Text
+ * @package  Text_CAPTCHA
+ * @author   Christian Wenz <wenz@php.net>
+ * @author   Michael Cramer <michael@bigmichi1.de>
+ * @license  http://www.opensource.org/licenses/bsd-license.php BSD License
+ * @link     http://pear.php.net/package/Text_CAPTCHA
+ * @todo     refine the obfuscation algorithm :-)
+ * @todo     consider removing Image_Text dependency
+ */
+class Text_CAPTCHA_Driver_Image extends Text_CAPTCHA_Driver_Base
+{
+    /**
+     * Text_Password options.
+     *
+     * @var array
+     */
+    private $_textPasswordOptions;
+    /**
+     * Width of CAPTCHA
+     *
+     * @var int
+     */
+    private $_width;
+
+    /**
+     * Height of CAPTCHA
+     *
+     * @var int
+     */
+    private $_height;
+
+    /**
+     * CAPTCHA output format
+     *
+     * @var string
+     */
+    private $_output;
+
+    /**
+     * Further options (here: for Image_Text)
+     *
+     * @var array
+     */
+    private $_imageOptions = array(
+        'font_size' => 24,
+        'font_path' => './',
+        'font_file' => 'COUR.TTF',
+        'text_color' => '#000000',
+        'lines_color' => '#CACACA',
+        'background_color' => '#555555',
+        'antialias' => false
+    );
+
+    /**
+     * Init function
+     *
+     * Initializes the new Text_CAPTCHA_Driver_Image object and creates a GD image
+     *
+     * @param array $options CAPTCHA options
+     *
+     * @return void
+     */
+    public function initDriver($options = array())
+    {
+        if (is_array($options)) {
+            if (isset($options['width']) && is_int($options['width'])) {
+                $this->_width = $options['width'];
+            } else {
+                $this->_width = 200;
+            }
+            if (isset($options['height']) && is_int($options['height'])) {
+                $this->_height = $options['height'];
+            } else {
+                $this->_height = 80;
+            }
+            if (!isset($options['phrase']) || empty($options['phrase'])) {
+                $phraseOptions = (isset($options['phraseOptions'])
+                    && is_array($options['phraseOptions']))
+                    ? $options['phraseOptions'] : array();
+                $this->_textPasswordOptions = $phraseOptions;
+            } else {
+                $this->setPhrase($options['phrase']);
+            }
+            if (!isset($options['output']) || empty($options['output'])) {
+                $this->_output = 'jpeg';
+            } else {
+                $this->_output = $options['output'];
+            }
+            if (isset($options['imageOptions'])
+                && is_array($options['imageOptions'])
+                && count($options['imageOptions']) > 0
+            ) {
+                $this->_imageOptions = array_merge(
+                    $this->_imageOptions, $options['imageOptions']
+                );
+            }
+        }
+    }
+
+    /**
+     * Create CAPTCHA image.
+     *
+     * This method creates a CAPTCHA image.
+     *
+     * @return void
+     * @throws Text_CAPTCHA_Exception when image generation with Image_Text produces
+     *               an error
+     */
+    public function createCAPTCHA()
+    {
+        $options['canvas'] = array(
+            'width' => $this->_width,
+            'height' => $this->_height
+        );
+        $options['width'] = $this->_width - 20;
+        $options['height'] = $this->_height - 20;
+        $options['cx'] = ceil(($this->_width) / 2 + 10);
+        $options['cy'] = ceil(($this->_height) / 2 + 10);
+        $options['angle'] = rand(0, 30) - 15;
+        $options['font_size'] = $this->_imageOptions['font_size'];
+        $options['font_path'] = $this->_imageOptions['font_path'];
+        $options['font_file'] = $this->_imageOptions['font_file'];
+        $options['color'] = array($this->_imageOptions['text_color']);
+        $options['background_color'] = $this->_imageOptions['background_color'];
+        $options['max_lines'] = 1;
+        $options['mode'] = 'auto';
+
+        do {
+            $imageText = new Image_Text($this->getPhrase(), $options);
+            $imageText->init();
+            $result = $imageText->measurize();
+        } while ($result === false && --$options['font_size'] > 0);
+        if ($result === false) {
+            throw new Text_CAPTCHA_Exception(
+                'The text provided does not fit in the image dimensions'
+            );
+        }
+        $imageText->render();
+        $image = $imageText->getImg();
+
+        if ($this->_imageOptions['antialias'] && function_exists('imageantialias')) {
+            imageantialias($image, true);
+        }
+
+        $colors = Image_Text::convertString2RGB(
+            $this->_imageOptions['lines_color']
+        );
+        $linesColor = imagecolorallocate(
+            $image, $colors['r'], $colors['g'], $colors['b']
+        );
+        //some obfuscation
+        for ($i = 0; $i < 3; $i++) {
+            $x1 = rand(0, $this->_width - 1);
+            $y1 = rand(0, round($this->_height / 10, 0));
+            $x2 = rand(0, round($this->_width / 10, 0));
+            $y2 = rand(0, $this->_height - 1);
+            imageline($image, $x1, $y1, $x2, $y2, $linesColor);
+            $x1 = rand(0, $this->_width - 1);
+            $y1 = $this->_height - rand(1, round($this->_height / 10, 0));
+            $x2 = $this->_width - rand(1, round($this->_width / 10, 0));
+            $y2 = rand(0, $this->_height - 1);
+            imageline($image, $x1, $y1, $x2, $y2, $linesColor);
+            $cx = rand(0, $this->_width - 50) + 25;
+            $cy = rand(0, $this->_height - 50) + 25;
+            $w = rand(1, 24);
+            imagearc($image, $cx, $cy, $w, $w, 0, 360, $linesColor);
+        }
+
+        // @todo remove hardcoded value
+        $this->_output = 'jpg';
+
+        if ($this->_output == 'gif' && imagetypes() & IMG_GIF) {
+            $this->setCaptcha($this->_getCAPTCHAAsGIF($image));
+        } else if (($this->_output == 'jpg' && imagetypes() & IMG_JPG)
+            || ($this->_output == 'jpeg' && imagetypes() & IMG_JPEG)
+        ) {
+            $this->setCaptcha($this->_getCAPTCHAAsJPEG($image));
+        } else if ($this->_output == 'png' && imagetypes() & IMG_PNG) {
+            $this->setCaptcha($this->_getCAPTCHAAsPNG($image));
+        } else if ($this->_output == 'resource') {
+            $this->setCaptcha($image);
+        } else {
+            throw new Text_CAPTCHA_Exception(
+                "Unknown or unsupported output type specified"
+            );
+        }
+
+        imagedestroy($image);
+    }
+
+    /**
+     * Return CAPTCHA as PNG.
+     *
+     * This method returns the CAPTCHA as PNG.
+     *
+     * @param resource $image generated image
+     *
+     * @return string image contents
+     */
+    private function _getCAPTCHAAsPNG($image)
+    {
+        ob_start();
+        imagepng($image);
+        $data = ob_get_contents();
+        ob_end_clean();
+        return $data;
+    }
+
+    /**
+     * Return CAPTCHA as JPEG.
+     *
+     * This method returns the CAPTCHA as JPEG.
+     *
+     * @param resource $image generated image
+     *
+     * @return string image contents
+     */
+    public function _getCAPTCHAAsJPEG($image)
+    {
+        ob_start();
+        imagejpeg($image);
+        $data = ob_get_contents();
+        ob_end_clean();
+        return $data;
+    }
+
+    /**
+     * Return CAPTCHA as GIF.
+     *
+     * This method returns the CAPTCHA as GIF.
+     *
+     * @param resource $image generated image
+     *
+     * @return string image contents
+     */
+    private function _getCAPTCHAAsGIF($image)
+    {
+        ob_start();
+        imagegif($image);
+        $data = ob_get_contents();
+        ob_end_clean();
+        return $data;
+    }
+
+    /**
+     * Create random CAPTCHA phrase, Image edition (with size check).
+     *
+     * This method creates a random phrase, maximum 8 characters or width / 25,
+     * whatever is smaller.
+     *
+     * @return void
+     */
+    public function createPhrase()
+    {
+        $len = intval(min(8, $this->_width / 25));
+        $options = $this->_textPasswordOptions;
+        $textPassword = new Text_Password();
+        if (!is_array($options) || count($options) === 0) {
+            $this->setPhrase($textPassword->create($len));
+        } else {
+            if (count($options) === 1) {
+                $this->setPhrase($textPassword->create($len, $options[0]));
+            } else {
+                $this->setPhrase(
+                    $textPassword->create($len, $options[0], $options[1])
+                );
+            }
+        }
+    }
+}

main/inc/lib/pear/Text/CAPTCHA/Driver/Numeral.php

@@ -0,0 +1,268 @@
+<?php
+/**
+ * Class used for numeral captchas
+ *
+ * PHP version 5
+ *
+ * @category Text
+ * @package  Text_CAPTCHA
+ * @author   David Coallier <davidc@agoraproduction.com>
+ * @author   Christian Wenz <wenz@php.net>
+ * @author   Michael Cramer <michael@bigmichi1.de>
+ * @license  http://www.opensource.org/licenses/bsd-license.php BSD License
+ * @link     http://pear.php.net/package/Text_CAPTCHA
+ */
+
+/**
+ * Class used for numeral captchas
+ *
+ * This class is intended to be used to generate numeral captchas as such as:
+ * Example:
+ *  Give me the answer to "54 + 2" to prove that you are human.
+ *
+ * @category Text
+ * @package  Text_CAPTCHA
+ * @author   David Coallier <davidc@agoraproduction.com>
+ * @author   Christian Wenz <wenz@php.net>
+ * @author   Michael Cramer <michael@bigmichi1.de>
+ * @license  http://www.opensource.org/licenses/bsd-license.php BSD License
+ * @link     http://pear.php.net/package/Text_CAPTCHA
+ */
+class Text_CAPTCHA_Driver_Numeral extends Text_CAPTCHA_Driver_Base
+{
+    /**
+     * This variable holds the minimum range value default set to "1".
+     *
+     * @var integer $_minValue The minimum value of the number range.
+     */
+    private $_minValue = 1;
+
+    /**
+     * This variable holds the maximum range value default set to "50".
+     *
+     * @var integer $_maxValue The maximum value of the number range.
+     */
+    private $_maxValue = 50;
+
+    /**
+     * The valid operators to use in the numeral captcha. We could use / and * but
+     * not yet.
+     *
+     * @var array $_operators The operations for the captcha.
+     */
+    private $_operators = array('-', '+');
+
+    /**
+     * This variable is basically the operation that we're going to be using in the
+     * numeral captcha we are about to generate.
+     *
+     * @var string $_operator The operation's operator to use.
+     */
+    private $_operator = '';
+
+    /**
+     * This variable holds the first number of the numeral operation we are about to
+     * generate.
+     *
+     * @var integer $_firstNumber The first number of the operation.
+     */
+    private $_firstNumber = 0;
+
+    /**
+     * This variable holds the value of the second variable of the operation we are
+     * about to generate for the captcha.
+     *
+     * @var integer $_secondNumber The second number of the operation.
+     */
+    private $_secondNumber = 0;
+
+    /**
+     * Initialize numeric CAPTCHA.
+     *
+     * @param array $options CAPTCHA options with these keys:<br>
+     *                       minValue minimum value<br>
+     *                       maxValue maximum value
+     *
+     * @return void
+     */
+    public function initDriver($options = array())
+    {
+        if (isset($options['minValue'])) {
+            $this->_minValue = (int)$options['minValue'];
+        } else {
+            $this->_minValue = 1;
+        }
+        if (isset($options['maxValue'])) {
+            $this->_maxValue = (int)$options['maxValue'];
+        } else {
+            $this->_maxValue = 50;
+        }
+        if (isset($options['operator'])) {
+            $this->_operator = $options['operator'];
+        } else {
+            $this->_operator = '';
+        }
+        if (isset($options['firstValue'])) {
+            $this->_firstNumber = (int)$options['firstValue'];
+        } else {
+            $this->_firstNumber = 0;
+        }
+        if (isset($options['secondValue'])) {
+            $this->_secondNumber = (int)$options['secondValue'];
+        } else {
+            $this->_secondNumber = 0;
+        }
+    }
+
+    /**
+     * Create the CAPTCHA (the numeral expression).
+     *
+     * This function determines a random numeral expression and set the associated
+     * class properties.
+     *
+     * @return void
+     * @see _generateFirstNumber()
+     * @see _generateSecondNumber()
+     * @see _generateOperator()
+     * @see _generateOperation()
+     */
+    public function createCAPTCHA()
+    {
+        if ($this->_firstNumber == 0) {
+            $this->_firstNumber = $this->_generateNumber();
+        }
+        if ($this->_secondNumber == 0) {
+            $this->_secondNumber = $this->_generateNumber();
+        }
+        if (empty($this->_operator)) {
+            $this->_operator = $this->_operators[array_rand($this->_operators)];
+        }
+        $this->_generateOperation();
+    }
+
+    /**
+     * Set operation.
+     *
+     * This variable sets the operation variable by taking the firstNumber,
+     * secondNumber and operator.
+     *
+     * @return void
+     * @see _operation
+     * @see _firstNumber
+     * @see _operator
+     * @see _secondNumber
+     */
+    private function _setOperation()
+    {
+        $this->setCaptcha(
+            $this->_firstNumber . ' ' . $this->_operator . ' ' . $this->_secondNumber
+        );
+    }
+
+    /**
+     * Generate a number.
+     *
+     * This function takes the parameters that are in the $this->_maxValue and
+     * $this->_minValue and get the random number from them using mt_rand().
+     *
+     * @return integer Random value between _minValue and _maxValue
+     * @see _minValue
+     * @see _maxValue
+     */
+    private function _generateNumber()
+    {
+        return mt_rand($this->_minValue, $this->_maxValue);
+    }
+
+    /**
+     * Adds values.
+     *
+     * This function will add the firstNumber and the secondNumber value and then
+     * call setAnswer to set the answer value.
+     *
+     * @return void
+     * @see _firstNumber
+     * @see _secondNumber
+     * @see _setAnswer()
+     */
+    private function _doAdd()
+    {
+        $phrase = $this->_firstNumber + $this->_secondNumber;
+        $this->setPhrase($phrase);
+    }
+
+    /**
+     * Does a subtract on the values.
+     *
+     * This function executes a subtraction on the firstNumber and the secondNumber
+     * to then call $this->setAnswer to set the answer value.
+     *
+     * If the _firstNumber value is smaller than the _secondNumber value then we
+     * regenerate the first number and regenerate the operation.
+     *
+     * @return void
+     * @see _firstNumber
+     * @see _secondNumber
+     * @see _setOperation()
+     * @see Text_CAPTCHA::setPhrase()
+     */
+    private function _doSubtract()
+    {
+        $first = $this->_firstNumber;
+        $second = $this->_secondNumber;
+
+        /**
+         * Check if firstNumber is smaller than secondNumber
+         */
+        if ($first < $second) {
+            $this->_firstNumber = $second;
+            $this->_secondNumber = $first;
+            $this->_setOperation();
+        }
+
+        $phrase = $this->_firstNumber - $this->_secondNumber;
+        $this->setPhrase($phrase);
+    }
+
+    /**
+     * Generate the operation
+     *
+     * This function will call the _setOperation() function to set the operation
+     * string that will be called to display the operation, and call the function
+     * necessary depending on which operation is set by this->operator.
+     *
+     * @return void
+     * @see _setOperation()
+     * @see _operator
+     * @see _doAdd()
+     * @see _doSubtract()
+     */
+    private function _generateOperation()
+    {
+        $this->_setOperation();
+        switch ($this->_operator) {
+        case '+':
+            $this->_doAdd();
+            break;
+        case '-':
+            $this->_doSubtract();
+            break;
+        default:
+            $this->_operator = "+";
+            $this->_setOperation();
+            $this->_doAdd();
+            break;
+        }
+    }
+
+    /**
+     * Create random CAPTCHA phrase. This method is a placeholder, since the equation
+     * is created in createCAPTCHA()
+     *
+     * @return string
+     */
+    public function createPhrase()
+    {
+        $this->setCaptcha(null);
+    }
+}

main/inc/lib/pear/Text/CAPTCHA/Driver/Word.php

@@ -0,0 +1,126 @@
+<?php
+/**
+ * Text_CAPTCHA_Driver_Word - Text_CAPTCHA driver word CAPTCHAs
+ * Class to create a textual Turing test
+ *
+ * PHP version 5
+ *
+ * @category Text
+ * @package  Text_CAPTCHA
+ * @author   Tobias Schlitt <schlitt@php.net>
+ * @author   Christian Wenz <wenz@php.net>
+ * @author   Michael Cramer <michael@bigmichi1.de>
+ * @license  http://www.opensource.org/licenses/bsd-license.php BSD License
+ * @link     http://pear.php.net/package/Text_CAPTCHA
+ */
+
+/**
+ * Require Numbers_Words class for generating the text.
+ *
+ * @category Text
+ * @package  Text_CAPTCHA
+ * @author   Tobias Schlitt <schlitt@php.net>
+ * @author   Christian Wenz <wenz@php.net>
+ * @author   Michael Cramer <michael@bigmichi1.de>
+ * @license  http://www.opensource.org/licenses/bsd-license.php BSD License
+ * @link     http://pear.php.net/package/Text_CAPTCHA
+ */
+class Text_CAPTCHA_Driver_Word extends Text_CAPTCHA_Driver_Base
+{
+    /**
+     * Phrase length.
+     * This variable holds the length of the Word.
+     *
+     * @var integer
+     */
+    private $_length;
+
+    /**
+     * Numbers_Words mode.
+     * This variable holds the mode for Numbers_Words.
+     *
+     * @var String
+     */
+    private $_mode;
+
+    /**
+     * Locale
+     * This variable holds the locale for Numbers_Words
+     *
+     * @var string
+     */
+    private $_locale;
+
+    /**
+     * Initializes the new Text_CAPTCHA_Driver_Word object.
+     *
+     * @param array $options CAPTCHA options with these keys:<br>
+     *                       phrase  The "secret word" of the CAPTCHA<br>
+     *                       length  The number of characters in the phrase<br>
+     *                       locale  The locale for Numbers_Words<br>
+     *                       mode    The mode for Numbers_Words
+     *
+     * @return void
+     */
+    public function initDriver($options = array())
+    {
+        if (isset($options['length']) && is_int($options['length'])) {
+            $this->_length = $options['length'];
+        } else {
+            $this->_length = 4;
+        }
+        if (isset($options['phrase']) && !empty($options['phrase'])) {
+            $this->setPhrase((string)$options['phrase']);
+        } else {
+            $this->createPhrase();
+        }
+        if (isset($options['mode']) && !empty($options['mode'])) {
+            $this->_mode = $options['mode'];
+        } else {
+            $this->_mode = 'single';
+        }
+        if (isset($options['locale']) && !empty($options['locale'])) {
+            $this->_locale = $options['locale'];
+        } else {
+            $this->_locale = 'en_US';
+        }
+    }
+
+    /**
+     * Create random CAPTCHA phrase, "Word edition" (numbers only).
+     * This method creates a random phrase
+     *
+     * @return void
+     */
+    public function createPhrase()
+    {
+        $phrase = new Text_Password();
+        $this->setPhrase(
+            $phrase->create(
+                $this->_length, 'unpronounceable', 'numeric'
+            )
+        );
+    }
+
+    /**
+     * Place holder for the real _createCAPTCHA() method
+     * used by extended classes to generate CAPTCHA from phrase
+     *
+     * @return void
+     */
+    public function createCAPTCHA()
+    {
+        $res = '';
+        $numberWords = new Numbers_Words();
+        $phrase = $this->getPhrase();
+        if ($this->_mode == 'single') {
+            $phraseArr = str_split($phrase);
+            for ($i = 0; $i < strlen($phrase); $i++) {
+                $res .= ' ' . $numberWords->toWords($phraseArr[$i], $this->_locale);
+            }
+        } else {
+            $res = $numberWords->toWords($phrase, $this->_locale);
+        }
+        $this->setCaptcha($res);
+    }
+}