Encrypt – Decrypt Class

I have come across a few petitions from some of you readers, and I will try to accomplish all of your requests as soon as possible. The first here is a class that I have built based on some ecnryption and decryption functions that I have used in the past. These functions can be found here: http://www.webmasterworld.com/php/3086138.htm?highlight=msg3086437

I took the liberty to create a class so that it can be downloaded by you guys. The use is simple and I can explain how to use it. Just include the class file and create a new object from it:

Usage

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<?php     /* Including encrypt class file */     include_once('jtcrypt.php');     /* Create a new object */     $enc = new jtcrypt(); ?>

In order to encrypt or decrypt, we will need to send in the the string to process, and a passphrase called the key. This key is to make your encryption/decryption process unique to your website. The way to do it is as follows:

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<?php     /* Encrypt a password */     $pass = $_POST['password'];     $key = 'SomeKeyThatYouWant';     $enc_pass = $enc->encrypt($pass, $key);          /* Do whatever you need to do with the encrypted phrase */     // ..     // ..          /* Decrypt password */     $dec_pass = $enc->decrypt($enc_pass, $key);     echo 'The decrypted password is :' .$dec_pass.'<br />';     ?>

Before Using!!

Make sure you initialize the the variables within the class before you encrypt or decrypt. This is to prevent errors.

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<?php     /* Initialize variable data */     $enc->init_values(); ?>

Below I have the full code for the class. I will soon put it up on github so that it will be available fordownloaded.

PHP

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<?php /** * Author: Jorge Torres - jotorres1@gmail.com * Website: http://www.jotorres.com * Source Website: http://www.webmasterworld.com/php/3086138.htm?highlight=msg3086437 * Date: 10/17/2012 * Version: 1.0 * Description: An encryption and decryption class for small projects * Documentation: http://www.jotorres.com/ */ class jtcrypt{          /**      * @access private      * @var string      */     private $result;     /**      * @access private      * @var int      */     private $count;              public function __construct(){         // Initial values         $this->init_values();     }          /**     * Function to encrypt     */     public function encrypt($string, $key) {                  for($i=0; $i<strlen($string); $i++) {             $char = substr($string, $i, 1);             $keychar = substr($key, ($i % strlen($key))-1, 1);             $char = chr(ord($char)+ord($keychar));             $this->result.=$char;         }         return base64_encode($this->result);     }          /**     * Function to decrypt     */     public function decrypt($string, $key) {                  $string = base64_decode($string);         for($i=0; $i<strlen($string); $i++) {             $char = substr($string, $i, 1);             $keychar = substr($key, ($i % strlen($key))-1, 1);             $char = chr(ord($char)-ord($keychar));             $this->result.=$char;         }         return $this->result;     }          /**     * Initialize values     */     public function init_values(){         $this->result = '';         $this->count = 0;     } } ?>