Simple Library Encrypt function In codeigniter

readme.md

in file application/libraries/autoload.php, add load library encrption

$autoload['libraries'] = array('Encryption');

On encrypt and decrypt proses, you can use something like this

$this->encryption->encode('Your data'); $this->encryption->decode('Your encrypted data');

Referensi : http://www.99points.info/2010/06/php-encrypt-decrypt-functions-to-encrypt-url-data/

Encryption.php

<?php

class Encryption {
 var $skey  = "SuPerEncKey2010"; // you can change it
 
    public  function safe_b64encode($string) {
 
        $data = base64_encode($string);
        $data = str_replace(array('+','/','='),array('-','_',''),$data);
        return $data;
    }

 public function safe_b64decode($string) {
        $data = str_replace(array('-','_'),array('+','/'),$string);
        $mod4 = strlen($data) % 4;
        if ($mod4) {
            $data .= substr('====', $mod4);
        }
        return base64_decode($data);
    }
 
    public  function encode($value){ 
  
     if(!$value){return false;}
        $text = $value;
        $iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
        $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
        $crypttext = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $this->skey, $text, MCRYPT_MODE_ECB, $iv);
        return trim($this->safe_b64encode($crypttext)); 
    }
    
    public function decode($value){
  
        if(!$value){return false;}
        $crypttext = $this->safe_b64decode($value); 
        $iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
        $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
        $decrypttext = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $this->skey, $crypttext, MCRYPT_MODE_ECB, $iv);
        return trim($decrypttext);
    }
}