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          * sends the encrypted request to router
  10          *
  11          * @param       string  $path
  12          * @param       mixed   $fields
  13          * @param       string  $cookie
  14          * @return      array
  15          */
  16         private function sentEncryptedRequest ($path, $fields, $cookie = false) {
  17                 $count = count($fields);
  18                 $fields = $this->encrypt(http_build_query($fields));
  19                 return $this->sentRequest($path, $fields, $cookie, $count);
  20         }
  21
  22         /**
  23          * decrypt data from router
  24          *
  25          * @param       string  $data
  26          * @return      array
  27          */
  28         private function decrypt ($data) {
  29                 $iv = hex2bin(substr($this->challenge, 16, 16));
  30                 $adata = hex2bin(substr($this->challenge, 32, 16));
  31                 $key = hex2bin($this->derivedk);
  32                 $enc = hex2bin($data);
  33
  34                 $factory = new CryptLib\Cipher\Factory();
  35                 $aes = $factory->getBlockCipher('rijndael-128');
  36                 $aes->setKey($key);
  37                 $mode = $factory->getMode('ccm', $aes, $iv, [ 'adata' => $adata, 'lSize' => 7]);
  38
  39                 $mode->decrypt($enc);
  40
  41                 return $mode->finish();
  42         }
  43
  44         /**
  45          * decrypt data for the router
  46          *
  47          * @param       string  $data
  48          * @return      string
  49          */
  50         private function encrypt ($data) {
  51                 $iv = hex2bin(substr($this->challenge, 16, 16));
  52                 $adata = hex2bin(substr($this->challenge, 32, 16));
  53                 $key = hex2bin($this->derivedk);
  54
  55                 $factory = new CryptLib\Cipher\Factory();
  56                 $aes = $factory->getBlockCipher('rijndael-128');
  57                 $aes->setKey($key);
  58                 $mode = $factory->getMode('ccm', $aes, $iv, [ 'adata' => $adata, 'lSize' => 7]);
  59                 $mode->encrypt($data);
  60
  61                 return bin2hex($mode->finish());
  62         }
  63 }