/site/helpers/encryption.php

<?php

/**

 * SimpleDownload default encryption functions.  These are really only intended

 * for educational purposes and for areas where security is not highly important.

 * 

 * @package    Joomla.Joelrowley.Com

 * @subpackage Components

 * @link http://joomla.joelrowley.com/

 * @license		GNU/GPL

 */



// no direct access

defined('_JEXEC') or die('Restricted access');



function jcrypt($str, $offset=3) {

    $max = strlen($str);

    for($i = 0; $i < $max; $i++){

        //if the letter is upper case, keep it uppercase

        if(ord($str[$i]) >= 65 && ord($str[$i]) <= 90){

            if((ord($str[$i])+$offset) > 90) {

                $crypt .= chr(65+((ord($str[$i])+$offset)-91));

            } else if((ord($str[$i])+$offset) < 65) {

                $crypt .= chr(90+((ord($str[$i])+$offset)-64));

            } else {

                $crypt .= chr(ord($str[$i])+$offset);

            }

        }

        

        //if the letter is lower case, keep it lower case

        else if(ord($str[$i]) >= 97 && ord($str[$i]) <= 122){

            if((ord($str[$i])+$offset) > 122) {

                $crypt .= chr(97+((ord($str[$i])+$offset)-123));

            } else if((ord($str[$i])+$offset) < 97) {

                $crypt .= chr(122+((ord($str[$i])+$offset)-96));

            } else {

                $crypt .= chr(ord($str[$i])+$offset);

            }

        }

        

    	else if(ord($str[$i]) >= 48 && ord($str[$i]) <= 57){

            if((ord($str[$i])+$offset) > 57) {

                $crypt .= chr(48+((ord($str[$i])+$offset)-58));

            } else {

                $crypt .= chr(ord($str[$i])+$offset);

            }

        }

        

        else {

        	$crypt .= chr(ord($str[$i])+$offset);

        	// in case of path separator

        	/*if (ord($str[$i]) == 47) {

        		$crypt .= '#';

        	// in case of period

        	} else if (ord($str[$i]) == 46) {

        		$crypt .= '*';

        	// in case of dash (-)

        	} else if (ord($str[$i]) == 45) {

        		$crypt .= '!';

        	} else {

        		echo "<- " . $i . " - " . ord($str[$i]) . " ->";

        	}*/

            //die("You can only use letters.");

            //$crypt .= chr(ord($str[$i])+$offset);

        }

    }

    //$crypt = strtoupper($crypt);

    return $crypt;

}



function jdecrypt($str) {

	return jcrypt($str, -3);

}



function jcrypt64($str) {

	return base64_encode($str);

}



function jdecrypt64($str) {

	return base64_decode($str);

}



?>