?php

class DesUtil
{
  /**
   * Des 加密
   *
   * @param $str
   * @param $secretKey
   * @param string $iv
   * @return string
   */
  public static function encrypt($str, $secretKey, $iv = '')
  {
    return base64_encode(openssl_encrypt($str, 'des-cbc', $secretKey, OPENSSL_RAW_DATA, $iv));
  }

  /**
   * Des 解密
   *
   * @param $str
   * @param $secretKey
   * @param string $iv
   * @return string
   */
  public static function decrypt($str, $secretKey, $iv = '')
  {
    return openssl_decrypt(base64_decode($str), 'des-cbc', $secretKey, OPENSSL_RAW_DATA, $iv);
  }
}