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I'm looking for a way to obfuscate and deobfuscate a string in JavaScript; by which I mean encryption and decryption when security is not an issue. Ideally something native to JS (like base64_encode() and base64_decode() in PHP) to "turn a string into something else and back again" without having to write a function.
Any suggestions welcome!
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If you have Google Chrome, open the web page that has the JavaScript you are trying to decrypt. Press F12 to open Developer Tools inside Chrome. Now switch to the Scripts tab, right-click and choose De-obfuscate source. That's it!
You can obfuscate the javascript source all you want, but it will always be reverse-engineerable just by virtue of requiring all the source code to actually run on the client machine... the best option I can think of is having all your processing done with server-side code, and all the client code javascript does is ...
String obfuscation is an established technique used by proprietary, closed-source applications to protect intellectual property. Furthermore, it is also frequently used to hide spyware or malware in applications. In both cases, the techniques range from bit-manipulation over XOR operations to AES encryption.
Encrypting some or all of a program's code is one obfuscation method. Other approaches include stripping out potentially revealing metadata, replacing class and variable names with meaningless labels and adding unused or meaningless code to an application script.
You can use btoa() and atob(). btoa() is like base64_encode() and atob() like base64_decode().
Here is an example:
btoa('Some text'); // U29tZSB0ZXh0 atob('U29tZSB0ZXh0'); // Some text Keep in mind that this is not a secure way to keep secrets. Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format by translating it into a radix-64 representation.
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It's worth noting that
(![]+[])[+[]]+(![]+[])[+!+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]
evaluates to the string "fail" without ever looking like a string. Seriously, enter it into node and be amazed. You can spell anything in JavaScript by being crazy.
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