前段时间在flashseer看到有人提到:可以通过socket方式传送swf文件,让用户无法获取到swf文件… 当时还没有出as3的反编译,所以对程序的保护没有在意.随着反编译程序的平民化,不希望别人看到源代码的朋友就比较着急…
通过socket方式传送swf文件来避免泄漏源代码的思路(只适用as3): 让主程序的loader(前台swf)通过socket连接到后台程序,然后请求需要的主程序文件.后台读取主程序数据通过socket发送给主程序的 loader.前台swf适用Loader.loadBytes方法显示主程序文件.
下面是测试的源程序:
package {
import flash.display.Sprite;
import flash.net.Socket;
import flash.events.*;
import flash.errors.IOError;
import flash.display.Loader;
public class SocketTest extends Sprite {
public function SocketTest() {
var socket = new Socket();
socket.connect("localhost", 5277);
socket.addEventListener(Event.CLOSE, closeHandler);
socket.addEventListener(Event.CONNECT, connectHandler);
socket.addEventListener(IOErrorEvent.IO_ERROR, ioErrorHandler);
socket.addEventListener(SecurityErrorEvent.SECURITY_ERROR, securityErrorHandler);
socket.addEventListener(ProgressEvent.SOCKET_DATA, socketDataHandler);
var response:String;
function writeln(str:String):void {
str+="";
try {
socket.writeUTFBytes(str);
} catch (e:IOError) {
trace(e);
}
}
function sendRequest():void {
trace("sendRequest");
response="";
writeln('bin');
socket.flush();
}
function readResponse():void {
//接受数据
var str:String=socket.readUTFBytes(socket.bytesAvailable);
response+=str;
//当数据以end结束的时候,数据传输结束
if (StringUtil.endsWith(str,'end')) {
response=response.substr(0,response.length-3);
//把字符串转换为ByteArray
var ba=Base64.decodeToByteArray(response);
//trace('bytearray=====',ba);
var l:Loader = new Loader();
//从 ByteArray 对象中所存储的二进制数据中加载。
l.loadBytes(ba);
//trace(l.content);
addChild(l);
}
}
function closeHandler(e:Event):void {
trace("Socket closed! ");
}
function connectHandler(e:Event):void {
trace("Socket connected!");
sendRequest();
}
function ioErrorHandler(e:IOErrorEvent):void {
trace("IOError!");
}
function securityErrorHandler(e:SecurityErrorEvent):void {
trace("SecurityError!");
}
function socketDataHandler(e:ProgressEvent):void {
trace("Socket have data!");
readResponse();
}
}
}
}
PHP:
//后台scoket程序,由于适用php写比较简单,就用php写了.
//error_reporting(E_ALL);
error_reporting(0);
set_time_limit(0);
ob_implicit_flush();
$address = 'localhost';
$port = 5277;
if (($sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)) < 0) {
echo 'socket_create() failed: reason: ' . socket_strerror($sock) . 'n';
}
if (($ret = socket_bind($sock, $address, $port)) < 0) {
echo 'socket_bind() failed: reason: ' . socket_strerror($ret) . 'n';
}
if (($ret = socket_listen($sock, 5)) < 0) {
echo 'socket_listen() failed: reason: ' . socket_strerror($ret) . 'n';
}
echo 'connect…………….';
do {
if (($msgsock = socket_accept($sock)) < 0) {
echo 'socket_accept() failed: reason: ' . socket_strerror($msgsock) . 'n';
break;
}
do {
socket_recv($msgsock, $buf, 2048, 0);
if ($buf == "") {
socket_close($msgsock);
echo "some one quit";
break;
} else if ($buf == "bin") {
//读取主程序数据
$f = fopen('main.swf','r');
$data = fread($f,filesize('main.swf'));
fclose($f);
//转换为字符串
//echo base64_encode($data);
$talkback = base64_encode($data).'end';
}
//发送
socket_send($msgsock, $talkback, strlen($talkback),0);
} while (true);
socket_close($msgsock);
} while (true);
socket_close($sock);