FROM debian:bullseye

#############################################
############ FOR DEBUGGING ONLY! ############
#############################################



RUN apt update -y && apt upgrade -y && apt install -y build-essential wget cmake tar gdb libc6-dbg python3 file


############### INSTALL FNETD
RUN wget https://cloud.sec.in.tum.de/index.php/s/n5cJnDqnnpSeEpd/download/fnetd.tar.xz -O /fnetd.tar.xz
RUN tar -xf fnetd.tar.xz
RUN mkdir /fnetd/build

WORKDIR /fnetd/build
RUN cmake .. -G "Unix Makefiles"
RUN make

WORKDIR /
############### END INSTALL

## Add your own dummy get_flag here
COPY get_flag /bin/get_flag

## Uncomment to use course libc.
COPY libc-2.31.so /lib/x86_64-linux-gnu/libc-2.31-bx.so
RUN ln -sf /lib/x86_64-linux-gnu/libc-2.31-bx.so /lib/x86_64-linux-gnu/libc.so.6

RUN useradd -m pwn

# compile vuln
COPY parent.tar.xz /home/pwn/parent.tar.xz
RUN mkdir /home/pwn/source
RUN tar xvf /home/pwn/parent.tar.xz -C /home/pwn/source
RUN mkdir /home/pwn/build
WORKDIR /home/pwn/build
RUN cmake /home/pwn/source -G "Unix Makefiles"
RUN make
WORKDIR /

RUN cp /home/pwn/build/vuln /home/pwn/vuln

RUN chmod 0755 /home/pwn/vuln

# setup for usage of gdb inside container
RUN echo "export LC_CTYPE=C.UTF-8" >> ~/.bashrc
RUN bash -c "$(wget https://gef.blah.cat/sh -O -)"

EXPOSE 1337

# Feel free to replace password with the actual chall pw
ENV FNETD_PASSWORD=1234
CMD ["/fnetd/build/fnetd", "-p", "1337", "-u", "pwn", "-lt", "2", "-lm", "536870912", "./vuln"]