FROM debian:bullseye

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############ FOR DEBUGGING ONLY! ############
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RUN apt update -y && apt upgrade -y && apt install -y build-essential wget cmake tar gdb libc6-dbg python3 file strace

COPY fnetd /bin/

## 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 DISABLE_PRESENTATION_BUILD=true cmake /home/pwn/source -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Release
RUN make
WORKDIR /

RUN cp /home/pwn/build/vuln /home/pwn/vuln
RUN cp /home/pwn/source/activation_key.txt /home/pwn/activation_key.txt

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", "-p", "1337", "-u", "pwn", "-lt", "2", "-lm", "536870912", "./vuln"]