GreHack 2019 - Reverse Prechall

Clone data repository

In gh19_thepuzzle repository, do:

git clone https://github.com/GreHack/gh19_thepuzzle_data data

Requirements

r2 and r2pipe are needed for the obfuscation

# Compile radare2
git clone https://github.com/radare/radare2
cd radare2
./sys/user.sh
./configure --prefix=~/.local
make -j4

# Install r2pipe in user home
pip3 install --user r2pipe

Then edit R2_PATH value in 2pac.py to the directory where radare2 executable is located, or set R2_PATH to None if the executable is in your environment PATH variable.

Building

Type in, at the root directory:

make clean && make