lyciumlee / flofli

flofli is an opensource project which aims to protect your software easily. flofli is the abbreviation for free llvm obuscator for llvm ir. It will let your software hard to analyse.

llvm-mini-Passes-build-cmake and flofli

source base on https://github.com/banach-space/llvm-tutor .

What is the flofli

flofli is an opensource project which aims to protect your software easily. flofli is the abbreviation for free llvm obuscator for llvm ir. It will let your software hard to analyse. But obuscation may let your software slow.

plan

1. I will dissect other famous llvm obuscator to let the obfuscator model compile easylily.
2. The project can compile all obfuscator independently. Other obfuscator need compile all llvm and clang source code.

env

llvm 11 cmake make

How to build

mkdir build
cd build
cmake ../{Project Name}
make

How to use

split basic block

clang-11 -c -emit-llvm test.c -o test.bc
opt-11 -load ./libSplitBlocks.so --split_num=3 --splitbbl < test.bc -o test_split.bc
opt-11 --view-cfg ./test_split.bc

Flattening

Note: Flattening need cfg which have two or more blocks.

clang-11 -c -emit-llvm test.c -o test.bc
opt-11 -load ./libFlattening.so --flattening < test.bc -o test_split.bc
opt-11 --view-cfg ./test_split.bc

bogus control flow

Note: bogus control flow need cfg which have two or more blocks.

clang-11 -c -emit-llvm test.c -o test.bc
opt-11 -load ./libBogusControlFlow.so --boguscf --bcf_prob=100 ./test_split.ll -o ./test_bogus.bc
opt-11 --view-cfg ./test_bogus.bc