Date: Tue, 28 Nov 2017 15:17:43 +0100 From: harrim4n <harrim4n@...rim4n.com> To: john-users@...ts.openwall.com Subject: Compiling John as a shared object Hi all, I'm trying to compile John as a shared object to use in python bindings for a project I'm working on. I'm using the latest version from https://github.com/magnumripper/JohnTheRipper/tree/bleeding-jumbo. However I'm running into some issues doing so, namely the x86-64.S file. As this file is assembly, I can't simply recompile it with -fPIC. This causes the following error when trying to create a "libjohn.so" file: /usr/bin/ld: x86-64.o: relocation R_X86_64_PC32 against symbol `nt_buffer8x' can not be used when making a shared object; recompile with -fPIC However, to me, the assembly already looks to be position independent. This is also indicated by the comment on line 1769: /* ...converted to use %rip-relative addressing, still public domain */ Does anyone have pointers as to how I could either modify the assembly to be PI or any other way I could create python bindings for John? I am aware that I could rebuild the python interpreter and use static linking, however I would like to avoid this option because of obvious maintainability issues. I also tried simply using a statically built lib in the setup.py file, but then I get ImportError: /usr/lib/python2.7/site-packages/pyJohn.so: undefined symbol: fmt_nsec3 Thanks! harrim4n
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