On Wed, Sep 1, 2021 at 7:17 PM Mehaboob kk <mehaboo...@gmail.com> wrote:
> Sorry, I missed this post. Thank you for answering my question. What I am > doing now is to build multiple .a files and combine while linking into one > wasm file. > I tried reverse engineer wasm and .a files back to c file and its still > wat like format not getting back to the original c/c++ code which I started > with. However, someone who is intimately familiar with wasm may be able to > figure out the source, just like a assembly language expert can understand > the logic. Now I am trying to apply some source obfuscation as binary > obfuscation tools not available for wasm. > Do you think my understanding is correct? Are there any tools out there to > reproduce the exact c code from wasm binary? > > No, just like with other binary formats, disassemblers and de-compilers can never reproduce the exact C code from a binary. For example local variable names cannot ever be recovered. > > > On Sat, Jun 19, 2021 at 8:23 PM 'Sam Clegg' via emscripten-discuss < > emscripten-discuss@googlegroups.com> wrote: > >> What is the current mechanism for loading the wasm file you are >> supplying? Are you using emscripten's dynamic linking capability (i.e. >> MAIN_MODULE + SIDE_MODULE?). >> >> If that answer is yes, and you are asking about linking a SIDE_MODULE >> into the MAIN_MODULE ahead of time, its not something that is supported >> no. Also, shared libraries (side moudles) are are only slightly more >> obfuscated than object files and `.a` archives. They are all in the wasm >> format which is fairly easy to disassembly. If you want to try to prevent >> decompilation or disassembly you would need to do more than just ship as a >> shared library (side module) you would also need to perform some kind of >> obfuscation, which by its nature (and the nature of WebAssemlby in >> particular) is always going to have limits. >> >> On Sat, Jun 19, 2021 at 3:45 PM Mehaboob kk <mehaboo...@gmail.com> wrote: >> >>> Hello, >>> >>> Is it possible to combine multiple .wasm files to one single .wasm file? >>> >>> Scenario: >>> I want to share a library(SDK) to an end customer who is building the >>> .wasm/JS application. Customer concerned that loading multiple wasm files >>> is not efficient. So we wanted to combine two wasm files. Although I can >>> share static lib generated using Emscripten, its not preferred because .a >>> file is easy to reverse compared to wasm right? >>> >>> Any inputs on this please? >>> >>> Thank you >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "emscripten-discuss" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to emscripten-discuss+unsubscr...@googlegroups.com. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/emscripten-discuss/CAO5iXcCQC45LU%3DNMFev5PYjn%2BmzOOgDfhXx0ahDXq8GqKRVjJQ%40mail.gmail.com >>> <https://groups.google.com/d/msgid/emscripten-discuss/CAO5iXcCQC45LU%3DNMFev5PYjn%2BmzOOgDfhXx0ahDXq8GqKRVjJQ%40mail.gmail.com?utm_medium=email&utm_source=footer> >>> . >>> >> -- >> You received this message because you are subscribed to the Google Groups >> "emscripten-discuss" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to emscripten-discuss+unsubscr...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/emscripten-discuss/CAL_va29zxMEFFi8gHEP5C0pBJ0idQh8qeqT%2B1S5v%3D9XO5BMKNA%40mail.gmail.com >> <https://groups.google.com/d/msgid/emscripten-discuss/CAL_va29zxMEFFi8gHEP5C0pBJ0idQh8qeqT%2B1S5v%3D9XO5BMKNA%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> > -- > You received this message because you are subscribed to the Google Groups > "emscripten-discuss" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to emscripten-discuss+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/emscripten-discuss/CAO5iXcA7%3DS0SD%2Bas_BZGvwKD95DT-%2B32%2Bk3zn_bDfNL77LhnOg%40mail.gmail.com > <https://groups.google.com/d/msgid/emscripten-discuss/CAO5iXcA7%3DS0SD%2Bas_BZGvwKD95DT-%2B32%2Bk3zn_bDfNL77LhnOg%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "emscripten-discuss" group. To unsubscribe from this group and stop receiving emails from it, send an email to emscripten-discuss+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/emscripten-discuss/CAL_va2_ztg_58RTBTMMotMezq2%3Dm_2FRhdBgQde92ByupNNA4A%40mail.gmail.com.
