> php教程 > php手册 > lua 与 php 通过AES数据加密进行通讯

lua 与 php 通过AES数据加密进行通讯

WBOY
풀어 주다: 2016-06-06 19:54:34
원래의
1582명이 탐색했습니다.

最近公司有款《围住神经猫》的微信小游戏火爆的不行!公司又决定开发一系列的神经猫的小游戏,于是,我被拉过来了。 后来使用cocos-2dx 开发一款小游戏,客户端用的是lua脚本,为了服务器与客户端交互的安全性,我们决定对API接口 传输的JSON数据进行加密、

最近公司有款《围住神经猫》的微信小游戏火爆的不行!公司又决定开发一系列的神经猫的小游戏,于是,我被拉过来了。

后来使用cocos-2dx 开发一款小游戏,客户端用的是lua脚本,为了服务器与客户端交互的安全性,我们决定对API接口

传输的JSON数据进行加密、解密。一般情况就是客户端加密,服务器段进行解密:

lua客户端使用的是一个纯lua写的库:aeslua,下载地址:http://luaforge.net/projects/aeslua/

但是该库是有问题的:用该库加密解密是没有问题的,但是跟PHP通讯就存在问题了,因为该库加密后base64之后的

字符串PHP是无法解密的!为了这个问题,我查阅了好多资料,终于找到某个国外大神的解决办法:

http://chainans.blogspot.com/2012/09/working-with-lua-encryption.html(可能有些同学无法FQ,故把原文贴出来如下:)

Working with Lua encryption

Recently working with Corona SDK, I start to need some standard encryption/decryption algorithm in Lua. To start with, actually, it has rather small number of developers comparing to the Objective-C which I have been working with. Meaning that there are fewer 3rd party librarys you can rely upon. Luckily, I found one called AESLua which has some code to start. From there, my objective is to make a way to securely passing data between my client and server. (php on server-side) In fact, from what I'd read, my method is not very secure but it is better than nothing. Just for my reference, here are the list of issues along the way


Edited: Tested with iPhone 4... Input cipher text of 1280 characters. Take around 25 seconds. Unacceptable speed for general uses.


1) It requires Lua 5.2 feature which does not seem to be in Corona

Solution: Download LuaBit v0.4 and integrate it... You will need to make a mapping to allow API call to the proper place

2) Next you need to get Base64 library -- grab it here https://gist.github.com/2563975 -- It initially made to allow passing it over the URL (using '-' and '_' instead of '+' and '/') So, I change them to the latter one.

3) For AESLua, by default, it uses AES-128, CBC, some kind of random padding

http://www.unsw.adfa.edu.au/~lpb/src/AEScalc/AEScalc.html

http://www.tools4noobs.com/online_tools/decrypt/

Here are the things to do

3.1) In pwInKey function, comment the line out

 password = ciphermode.encryptString(pwBytes, password, ciphermode.encryptCBC);

3.2) In util.padByteString function, change it to

    local paddingLength = math.ceil(#data/16)*16 - #data;

    local padding = "";

    local paddingValue = string.char ( paddingLength )  -- PKCS7 padding

    for i=1,paddingLength do

padding = padding .. paddingValue;-- PKCS7 padding

    end 


    return data .. padding;


4) Set up web server for testing, you will need php / mcrypt mod to test.

5) Creating a php for testing... here is a code

Now, my plain text below is "1234567890123456ss@#%de".



$data = 'dXzNDNxckOrb7uz2ON0AAJp4BXgkYewblTNWBSAQSEw=';

$key128 = '1234567890123456';

$iv =  '\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0';


echo mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $key128, base64_decode($data), MCRYPT_MODE_CBC, $iv)



?>



That's it. The encryption backward to client machine should be a piece of cake. =)


*** By using these library, the user should be aware of the fact that Lua's performance is still far from native code. You may not want to use this algorithm to encrypt a large volume of data.


按照他的办法,一切都OK了。但是有以下几点需要说明以下:(本人摸索的)

1.利用CBC模式加密的字符串的key必须是16位,否则PHP无法解密!

2.明文字符串的必须把key作为前缀加进去

3.上面文章中没有把unpack函数写出来,本人查阅了一些资料,补充了,否则aeslua无法正常解密了!

util.lua中的下面这个函数改为如下:

function public.unpadByteString(data)
    local padLength = tonum((string.byte(data, #data)));
    return string.sub(data,1, #data-padLength)   --unpack
end

원천:php.cn
본 웹사이트의 성명
본 글의 내용은 네티즌들의 자발적인 기여로 작성되었으며, 저작권은 원저작자에게 있습니다. 본 사이트는 이에 상응하는 법적 책임을 지지 않습니다. 표절이나 침해가 의심되는 콘텐츠를 발견한 경우 admin@php.cn으로 문의하세요.
인기 추천
인기 튜토리얼
더>
최신 다운로드
더>
웹 효과
웹사이트 소스 코드
웹사이트 자료
프론트엔드 템플릿