Enable testing of the exploit (#4)

* Enable testing exploit

* Fix unused result warning

* Fix oversight in CI

* Fix oversight in CI II

* Fix oversight in CI III

* Fix oversight in CI IV

* Debugging CI

* Debugging CI

* Debugging CI

* Debugging & supplying custom libc

* Trying out stuff.

* Triggering CI?

* Testing around.

* Fix test_exploit CI.

* Fix test_exploit CI.

tests/Dockerfile

@@ -0,0 +1,59 @@
+FROM debian:bullseye
+
+RUN apt update -y && apt upgrade -y && apt install -y build-essential wget cmake
+
+############### 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 dummy get_flag
+COPY tests/get_flag.c /bin/get_flag.c
+RUN gcc -O3 /bin/get_flag.c -o /bin/get_flag
+RUN rm /bin/get_flag.c
+
+## Use course libc
+COPY tests/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
+
+COPY . /home/pwn/source
+
+# compile vuln in debug mode
+RUN mkdir /home/pwn/debug
+WORKDIR /home/pwn/debug
+RUN cmake /home/pwn/source -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Debug
+RUN make
+
+RUN mkdir /home/pwn/release
+WORKDIR /home/pwn/release
+RUN cmake /home/pwn/source -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Release
+RUN make
+
+RUN chown -R pwn:pwn /home/pwn
+
+ARG FNETD_PASSWORD
+ENV FNETD_PASSWORD $FNETD_PASSWORD
+
+ARG RELEASE_PORT
+ENV PORT_RELEASE $RELEASE_PORT
+
+ARG DEBUG_PORT
+ENV PORT_DEBUG $DEBUG_PORT
+
+EXPOSE $DEBUG_PORT
+EXPOSE $RELEASE_PORT
+
+WORKDIR /home/pwn
+RUN cp /home/pwn/source/activation_key.txt activation_key.txt
+
+
+ENTRYPOINT ["sh", "-c", "/fnetd/build/fnetd -p $PORT_DEBUG -u pwn -lt 2 -lm 536870912 /home/pwn/debug/vuln & /fnetd/build/fnetd -p $PORT_RELEASE -u pwn -lt 2 -lm 536870912 /home/pwn/release/vuln"]