|
|
|
|
|
|
by jandrese
2386 days ago
|
|
|
I guess he's saying that an unminifier tool is effectively no different than a decompiler, and both are basically unreadable without it. That said, I don't know of any webassembly decompilers, although I guess they must exist by this point. But also historically decompilers have been imperfect as some of the structure of the code is lost in the compilation process and has to be inferred, sometimes incorrectly, by the decompiler. Compare to a minifier where all you lose is the variable names, comments, and possibly helpful whitespace. All of the structure of the code is still there and there are no heuristics necessary to recreate something that resembles the original source. |
|
|
I haven't written any productive WebAssembly but I play Capture The Flag competitions, and it's become frequent for a wasm reverse engineering challenge to be thrown in. The tools are good enough to make that tractable, even for non-experts in wasm like me.
It helps a little that it's a stack-based rather than register-based VM. Usually more of the intent of code is preserved that way. It's like reversing a JVM class, rather than like reversing a native binary.