PHP实现微信小程序用户授权的工具类示例(5)

<?php
/**
 * Created by PhpStorm.
 * User: Auser
 * Time: 10:55
 */

namespace App\Http\Base\Wx;

class Prpcrypt
{
  public $key;

  public function __construct($key)
  {
    $this->key = $key;
  }

  /**
   * 对密文进行解密
   * @param string $aesCipher 需要解密的密文
   * @param string $aesIV 解密的初始向量
   * @return string 解密得到的明文
   */
  public function decrypt($aesCipher, $aesIV)
  {

    try {
      $module = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, '');
      mcrypt_generic_init($module, $this->key, $aesIV);
      //解密
      $decrypted = mdecrypt_generic($module, $aesCipher);
      mcrypt_generic_deinit($module);
      mcrypt_module_close($module);
    } catch (Exception $e) {
      return array(ErrorCode::$IllegalBuffer, null);
    }


    try {
      $result = PKCS7Encoder2::decode($decrypted);
    } catch (Exception $e) {
      //print $e;
      return array(ErrorCode::$IllegalBuffer, null);
    }
    return array(0, $result);
  }
}

<?php
/**
 * Created by PhpStorm.
 * User: Auser
 * Time: 10:33
 */

namespace App\Http\Base\Wx;


class ErrorCode
{
  public static $OK = 0;
  public static $IllegalAesKey = -41001;
  public static $IllegalIv = -41002;
  public static $IllegalBuffer = -41003;
  public static $DecodeBase64Error = -41004;

}