File indexing completed on 2024-05-12 06:02:19

 <?php
 /**
  * Zend Framework
  *
  * LICENSE
  *
  * This source file is subject to the new BSD license that is bundled
  * with this package in the file LICENSE.txt.
  * It is also available through the world-wide-web at this URL:
  * http://framework.zend.com/license/new-bsd
  * If you did not receive a copy of the license and are unable to
  * obtain it through the world-wide-web, please send an email
  * to license@zend.com so we can send you a copy immediately.
  *
  * @category   Zend
  * @package    Zend_Captcha
  * @subpackage Adapter
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 
 /** @see Zend_Captcha_Base */
 // require_once 'Zend/Captcha/Base.php';
 
 /** @see Zend_Crypt_Math */
 // require_once 'Zend/Crypt/Math.php';
 
 /**
  * Word-based captcha adapter
  *
  * Generates random word which user should recognise
  *
  * @category   Zend
  * @package    Zend_Captcha
  * @subpackage Adapter
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 abstract class Zend_Captcha_Word extends Zend_Captcha_Base
 {
     /**#@+
      * @var array Character sets
      */
     static public $V  = array("a", "e", "i", "o", "u", "y");
     static public $VN = array("a", "e", "i", "o", "u", "y","2","3","4","5","6","7","8","9");
     static public $C  = array("b","c","d","f","g","h","j","k","m","n","p","q","r","s","t","u","v","w","x","z");
     static public $CN = array("b","c","d","f","g","h","j","k","m","n","p","q","r","s","t","u","v","w","x","z","2","3","4","5","6","7","8","9");
     /**#@-*/
 
     /**
      * Random session ID
      *
      * @var string
      */
     protected $_id;
 
     /**
      * Generated word
      *
      * @var string
      */
     protected $_word;
 
     /**
      * Session
      *
      * @var Zend_Session_Namespace
      */
     protected $_session;
 
     /**
      * Class name for sessions
      *
      * @var string
      */
     protected $_sessionClass = 'Zend_Session_Namespace';
 
     /**
      * Should the numbers be used or only letters
      *
      * @var boolean
      */
     protected $_useNumbers = true;
 
     /**
      * Should both cases be used or only lowercase
      *
      * @var boolean
      */
     // protected $_useCase = false;
 
     /**
      * Session lifetime for the captcha data
      *
      * @var integer
      */
     protected $_timeout = 300;
 
     /**
      * Should generate() keep session or create a new one?
      *
      * @var boolean
      */
     protected $_keepSession = false;
 
     /**#@+
      * Error codes
      */
     const MISSING_VALUE = 'missingValue';
     const MISSING_ID    = 'missingID';
     const BAD_CAPTCHA   = 'badCaptcha';
     /**#@-*/
 
     /**
      * Error messages
      * @var array
      */
     protected $_messageTemplates = array(
         self::MISSING_VALUE => 'Empty captcha value',
         self::MISSING_ID    => 'Captcha ID field is missing',
         self::BAD_CAPTCHA   => 'Captcha value is wrong',
     );
 
     /**
      * Length of the word to generate
      *
      * @var integer
      */
     protected $_wordlen = 8;
 
     /**
      * Retrieve session class to utilize
      *
      * @return string
      */
     public function getSessionClass()
     {
         return $this->_sessionClass;
     }
 
     /**
      * Set session class for persistence
      *
      * @param  string $_sessionClass
      * @return Zend_Captcha_Word
      */
     public function setSessionClass($_sessionClass)
     {
         $this->_sessionClass = $_sessionClass;
         return $this;
     }
 
     /**
      * Retrieve word length to use when genrating captcha
      *
      * @return integer
      */
     public function getWordlen()
     {
         return $this->_wordlen;
     }
 
     /**
      * Set word length of captcha
      *
      * @param integer $wordlen
      * @return Zend_Captcha_Word
      */
     public function setWordlen($wordlen)
     {
         $this->_wordlen = $wordlen;
         return $this;
     }
 
     /**
      * Retrieve captcha ID
      *
      * @return string
      */
     public function getId()
     {
         if (null === $this->_id) {
             $this->_setId($this->_generateRandomId());
         }
         return $this->_id;
     }
 
     /**
      * Set captcha identifier
      *
      * @param string $id
      * @return Zend_Captcha_Word
      */
     protected function _setId($id)
     {
         $this->_id = $id;
         return $this;
     }
 
     /**
      * Set timeout for session token
      *
      * @param  int $ttl
      * @return Zend_Captcha_Word
      */
     public function setTimeout($ttl)
     {
         $this->_timeout = (int) $ttl;
         return $this;
     }
 
     /**
      * Get session token timeout
      *
      * @return int
      */
     public function getTimeout()
     {
         return $this->_timeout;
     }
 
     /**
      * Sets if session should be preserved on generate()
      *
      * @param bool $keepSession Should session be kept on generate()?
      * @return Zend_Captcha_Word
      */
     public function setKeepSession($keepSession)
     {
         $this->_keepSession = $keepSession;
         return $this;
     }
 
     /**
      * Numbers should be included in the pattern?
      *
      * @return bool
      */
     public function getUseNumbers()
     {
         return $this->_useNumbers;
     }
 
     /**
      * Set if numbers should be included in the pattern
      *
      * @param bool $_useNumbers numbers should be included in the pattern?
      * @return Zend_Captcha_Word
      */
     public function setUseNumbers($_useNumbers)
     {
         $this->_useNumbers = $_useNumbers;
         return $this;
     }
 
     /**
      * Get session object
      *
      * @return Zend_Session_Namespace
      */
     public function getSession()
     {
         if (!isset($this->_session) || (null === $this->_session)) {
             $id = $this->getId();
             if (!class_exists($this->_sessionClass)) {
                 // require_once 'Zend/Loader.php';
                 Zend_Loader::loadClass($this->_sessionClass);
             }
             $this->_session = new $this->_sessionClass('Zend_Form_Captcha_' . $id);
             $this->_session->setExpirationHops(1, null, true);
             $this->_session->setExpirationSeconds($this->getTimeout());
         }
         return $this->_session;
     }
 
     /**
      * Set session namespace object
      *
      * @param  Zend_Session_Namespace $session
      * @return Zend_Captcha_Word
      */
     public function setSession(Zend_Session_Namespace $session)
     {
         $this->_session = $session;
         if ($session) {
             $this->_keepSession = true;
         }
         return $this;
     }
 
     /**
      * Get captcha word
      *
      * @return string
      */
     public function getWord()
     {
         if (empty($this->_word)) {
             $session     = $this->getSession();
             $this->_word = $session->word;
         }
         return $this->_word;
     }
 
     /**
      * Set captcha word
      *
      * @param  string $word
      * @return Zend_Captcha_Word
      */
     protected function _setWord($word)
     {
         $session       = $this->getSession();
         $session->word = $word;
         $this->_word   = $word;
         return $this;
     }
 
     /**
      * Generate new random word
      *
      * @return string
      */
     protected function _generateWord()
     {
         $word       = '';
         $wordLen    = $this->getWordLen();
         $vowels     = $this->_useNumbers ? self::$VN : self::$V;
         $consonants = $this->_useNumbers ? self::$CN : self::$C;
 
         $totIndexCon = count($consonants) - 1;
         $totIndexVow = count($vowels) - 1;
         for ($i=0; $i < $wordLen; $i = $i + 2) {
             // generate word with mix of vowels and consonants
             $consonant = $consonants[Zend_Crypt_Math::randInteger(0, $totIndexCon, true)];
             $vowel     = $vowels[Zend_Crypt_Math::randInteger(0, $totIndexVow, true)];
             $word     .= $consonant . $vowel;
         }
 
         if (strlen($word) > $wordLen) {
             $word = substr($word, 0, $wordLen);
         }
 
         return $word;
     }
 
     /**
      * Generate new session ID and new word
      *
      * @return string session ID
      */
     public function generate()
     {
         if (!$this->_keepSession) {
             $this->_session = null;
         }
         $id = $this->_generateRandomId();
         $this->_setId($id);
         $word = $this->_generateWord();
         $this->_setWord($word);
         return $id;
     }
 
     protected function _generateRandomId()
     {
         return md5(Zend_Crypt_Math::randBytes(32));
     }
 
     /**
      * Validate the word
      *
      * @see    Zend_Validate_Interface::isValid()
      * @param  mixed      $value
      * @param  array|null $context
      * @return boolean
      */
     public function isValid($value, $context = null)
     {
         if (!is_array($value) && !is_array($context)) {
             $this->_error(self::MISSING_VALUE);
             return false;
         }
         if (!is_array($value) && is_array($context)) {
             $value = $context;
         }
 
         $name = $this->getName();
 
         if (isset($value[$name])) {
             $value = $value[$name];
         }
 
         if (!isset($value['input'])) {
             $this->_error(self::MISSING_VALUE);
             return false;
         }
         $input = strtolower($value['input']);
         $this->_setValue($input);
 
         if (!isset($value['id'])) {
             $this->_error(self::MISSING_ID);
             return false;
         }
 
         $this->_id = $value['id'];
         if ($input !== $this->getWord()) {
             $this->_error(self::BAD_CAPTCHA);
             return false;
         }
 
         return true;
     }
 
     /**
      * Get captcha decorator
      *
      * @return string
      */
     public function getDecorator()
     {
         return "Captcha_Word";
     }
 }