1
2012
Encrypt – Decrypt Class
An article by 
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 for downloaded.
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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; } } ?> |
