我想做一个JavaScript应用程序,不是开源的,因此我希望学习如何可以混淆我的JS代码?这可能吗?


当前回答

有许多免费的JavaScript混淆工具;然而,我认为重要的是要注意,很难混淆JavaScript到不能进行逆向工程的地步。

为此,我在一定程度上使用了几个选项:

YUI Compressor. Yahoo!'s JavaScript compressor does a good job of condensing the code that will improve its load time. There is a small level of obfuscation that works relatively well. Essentially, Compressor will change function names, remove white space, and modify local variables. This is what I use most often. This is an open-source Java-based tool. JSMin is a tool written by Douglas Crockford that seeks to minify your JavaScript source. In Crockford's own words, "JSMin does not obfuscate, but it does uglify." It's primary goal is to minify the size of your source for faster loading in browsers. Free JavaScript Obfuscator. This is a web-based tool that attempts to obfuscate your code by actually encoding it. I think that the trade-offs of its form of encoding (or obfuscation) could come at the cost of filesize; however, that's a matter of personal preference.

其他回答

Dean Edward's Packer是一个很好的混淆器,尽管它主要是混淆代码,而不是代码中可能存在的任何字符串元素。

参见:在线Javascript压缩工具,并从下拉菜单中选择Packer (Dean Edwards)

我以前用过这个,它做得很好。它不是免费的,但你一定要看看。 JavaScript混淆器和编码器

你不能保护客户端代码:只需在谷歌Chrome上按F12,暂停javascript执行,你就会得到所有的字符串,即使是那些加密的。美化它和重命名变量,你会得到几乎原始的代码。

如果你正在编写服务器端javascript(即NodeJS),害怕有人入侵你的服务器,并想让黑客的工作更加困难,给你更多的时间来取回你的访问权限,那么使用javacript编译器:

你需要在高级编译中使用闭包编译器,因为它是唯一重命名所有变量的工具,即使这些变量在多个文件/模块中使用。但它有一个问题:它只有在你用它的编码风格写的时候才能工作。

与大多数其他答案相反,我建议反对YUI压缩机;你应该使用谷歌闭包。

不是因为它压缩更多,但主要是因为它会捕捉javascript错误,如a = [1,2,3,];这让IE失去了控制。

困惑:

试试YUI压缩机。这是一个非常流行的工具,由Yahoo UI团队构建、增强和维护。

你也可以使用:

闭包编译器 UglifyJS

更新:这个问题最初是在2008年提出的,并且所提到的技术已弃用。你可以使用:

Terser -更多信息在web.dev。

私有字符串数据:

保持字符串值为私有是另一个问题,混淆不会有太大的好处。当然,通过将您的源代码打包到一个混乱的、最小化的混乱中,您可以通过模糊获得轻量级的安全性。大多数情况下,是您的用户在查看源代码,客户端上的字符串值是为他们使用的,因此通常不需要那种私有字符串值。

If you really had a value that you never wanted a user to see, you would have a couple of options. First, you could do some kind of encryption, which is decrypted at page load. That would probably be one of the most secure options, but also a lot of work which may be unnecessary. You could probably base64 encode some string values, and that would be easier.. but someone who really wanted those string values could easily decode them. Encryption is the only way to truly prevent anyone from accessing your data, and most people find that to be more security than they need.

Sidenote:

众所周知,Javascript中的混淆会导致一些错误。混淆者在这方面做得越来越好,但许多公司认为他们从缩小和gzipping中看到了足够的好处,而混淆所带来的额外节省并不总是值得麻烦。如果您试图保护您的源代码,也许您会认为这是值得的,只是为了让您的代码更难阅读。JSMin是一个很好的替代方案。