public function decrypt($data){
	  ksort($data);
	  $toSign ='';
	  foreach($data as $key=>$value){
		 if(strcmp($key, 'sign')!= 0  && $value!=''){
		  $toSign .= $key.'='.$value.'&';
		}
	  }
	  
	  $str = rtrim($toSign,'&');
	  
	  $encrypted = '';
	  //替换自己的公钥
	  $pem = chunk_split('MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDd1nUQ6b3fgC8ARNSvTeJ2aKeUfN8QSi8DulFqgczmI6Wh/Y27HiQOr9Hb9/0lBeG9ALyvAcGcVNFlPbiAzl2EfRkY2thh3GTBjTXMKpMvIX2QUedJ8aqAy9cntXo3OHcSGD4b4hL3yg9B3BQzgYDZDN76x93zY0CB/9Og/qxF6QIDAQAB', 64, "\n");
	  $pem = "-----BEGIN PUBLIC KEY-----\n" . $pem . "-----END PUBLIC KEY-----\n";
	  $publickey = openssl_pkey_get_public($pem);
	  
	  $base64=str_replace(array('-', '_'), array('+', '/'), $data['sign']);
	  
	  $crypto = '';
	  foreach(str_split(base64_decode($base64), 128) as $chunk) {
		openssl_public_decrypt($chunk,$decrypted,$publickey);
		$crypto .= $decrypted;
	  }

	  if($str != $crypto){  
		exit('sign fail');
	  }
	}
	
	//加密
	public function encrypt($data){
		ksort($data);
		$str = '';
		foreach ($data as $k => $v){
		  if(!empty($v)){
			$str .=(string) $k.'='.$v.'&';
		  }
		}    
		$str = rtrim($str,'&');
		$encrypted = '';
		//替换成自己的私钥
		$pem = chunk_split('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', 64, "\n");
		$pem = "-----BEGIN PRIVATE KEY-----\n" . $pem . "-----END PRIVATE KEY-----\n";
		$private_key = openssl_pkey_get_private($pem);
		$crypto = '';
		foreach (str_split($str, 117) as $chunk) {
		  openssl_private_encrypt($chunk, $encryptData, $private_key);
		  $crypto .= $encryptData;
		}
		$encrypted = base64_encode($crypto);
		$encrypted = str_replace(array('+','/','='),array('-','_',''),$encrypted);
		
		$data['sign']=$encrypted;
		return $data;
	}
    public static function globalpay_http_post_res_json($url, $postData)
	{
          $options = array(
            'http' => array(
              'method' => 'POST',
              'header' => 'Content-type:application/json',
              'content' => $postData,
              'timeout' => 15 * 60 // 超时时间（单位:s）
            )
          );
          $context = stream_context_create($options);
          $result = file_get_contents($url, false, $context);
          return $result;
	}