dimaslanjaka / universal-framework

src/shim/Cipher.php

<?php

/**
 * Decrypt data from a CryptoJS json encoding string
 *
 * @param mixed $passphrase
 * @param mixed $jsonString
 * @return mixed
 */
function aesDecrypt($jsonString, $passphrase)
{
  $jsonString = base64_decode($jsonString);
  $jsondata = json_decode($jsonString, true);
  $salt = hex2bin($jsondata["s"]);
  $ct = base64_decode($jsondata["ct"]);
  $iv  = hex2bin($jsondata["iv"]);
  $concatedPassphrase = $passphrase . $salt;
  $md5 = array();
  $md5[0] = md5($concatedPassphrase, true);
  $result = $md5[0];
  for ($i = 1; $i < 3; $i++) {
    $md5[$i] = md5($md5[$i - 1] . $concatedPassphrase, true);
    $result .= $md5[$i];
  }
  $key = substr($result, 0, 32);
  $data = openssl_decrypt($ct, 'aes-256-cbc', $key, true, $iv);

true of type true is incompatible with the type integer expected by parameter $options of openssl_decrypt().

  return json_decode($data, true);
}

/**
 * Encrypt value to a cryptojs compatiable json encoding string
 *
 * @param mixed $passphrase
 * @param mixed $value
 * @return string
 */
function aesEncrypt($value, $passphrase)
{
  $salt = openssl_random_pseudo_bytes(8);
  $salted = '';
  $dx = '';
  while (strlen($salted) < 48) {
    $dx = md5($dx . $passphrase . $salt, true);
    $salted .= $dx;
  }
  $key = substr($salted, 0, 32);
  $iv  = substr($salted, 32, 16);
  $encrypted_data = openssl_encrypt(json_encode($value), 'aes-256-cbc', $key, true, $iv);

true of type true is incompatible with the type integer expected by parameter $options of openssl_encrypt().

  $data = array("ct" => base64_encode($encrypted_data), "iv" => bin2hex($iv), "s" => bin2hex($salt));
  $json = json_encode($data);
  return base64_encode($json);
}