lib/trait/CryptLib.class.php

   1 <?php
   2 /**
   3  * @author      Jan Altensen (Stricted)
   4  * @license     GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
   5  * @copyright   2015 Jan Altensen (Stricted)
   6  */
   7 trait CryptLib {
   8         /**
   9          * decrypt data from router
  10          *
  11          * @param       string  $data
  12          * @return      array
  13          */
  14         private function decrypt ($data) {
  15                 $iv = hex2bin(substr($this->challenge, 16, 16));
  16                 $adata = hex2bin(substr($this->challenge, 32, 16));
  17                 $key = hex2bin($this->derivedk);
  18                 $enc = hex2bin($data);
  19
  20                 $factory = new CryptLib\Cipher\Factory();
  21                 $aes = $factory->getBlockCipher('rijndael-128');
  22                 $aes->setKey($key);
  23                 $mode = $factory->getMode('ccm', $aes, $iv, [ 'adata' => $adata, 'lSize' => 7]);
  24
  25                 $mode->decrypt($enc);
  26
  27                 return $mode->finish();
  28         }
  29
  30         /**
  31          * decrypt data for the router
  32          *
  33          * @param       string  $data
  34          * @return      string
  35          */
  36         private function encrypt ($data) {
  37                 $iv = hex2bin(substr($this->challenge, 16, 16));
  38                 $adata = hex2bin(substr($this->challenge, 32, 16));
  39                 $key = hex2bin($this->derivedk);
  40
  41                 $factory = new CryptLib\Cipher\Factory();
  42                 $aes = $factory->getBlockCipher('rijndael-128');
  43                 $aes->setKey($key);
  44                 $mode = $factory->getMode('ccm', $aes, $iv, [ 'adata' => $adata, 'lSize' => 7]);
  45                 $mode->encrypt($data);
  46
  47                 return bin2hex($mode->finish());
  48         }
  49 }