<?php

namespace app\service;

use laytp\traits\Error;
use think\facade\Cache;
use think\facade\Config;
use think\facade\Request;

class Encrypt{
  use Error;

  /**
   * 初始化
   * @param $token
   * @return bool
   * @throws \think\db\exception\DataNotFoundException
   * @throws \think\db\exception\DbException
   * @throws \think\db\exception\ModelNotFoundException
   */
   public function encrypt($str, $key='A68AA4BA448752AC147A81ACBE2A8B4C'){
         $mixStr = md5(date('Y-m-d H:i:s').rand(1000,10000));
         $tmp = '';
         $strLen = strlen($str);
         for($i=0, $j=0; $i<$strLen; $i++, $j++){
             $j = $j == 32 ? 0 : $j;
             $tmp .= $mixStr[$j].($str[$i] ^ $mixStr[$j]);
         }
         return base64_encode($this->bind_key($tmp, $key));
     }

     public function bind_key($str, $key){
         $encrypt_key = md5($key);

         $tmp = '';
         $strLen = strlen($str);
         for($i=0, $j=0; $i<$strLen; $i++, $j++){
             $j = $j == 32 ? 0 : $j;
             $tmp .= $str[$i] ^ $encrypt_key[$j];
         }
         return $tmp;
     }

}