cscg ist super

2026/cscg/crypto/zipper/Dockerfile

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+FROM sagemath/sagemath:10.6@sha256:19995db6194f4a4bab18ce9a88556fd15b9ed5e916b4504fefe618a7796ddbdb
+
+USER root
+
+ADD --chmod=0755 --checksum=sha256:c125df9762b0c7233459087bb840c0e5dbfc4d9690ee227f1ed8994f4d51d2e0 \
+    https://raw.githubusercontent.com/reproducible-containers/repro-sources-list.sh/v0.1.4/repro-sources-list.sh \
+    /usr/local/bin/repro-sources-list.sh
+RUN repro-sources-list.sh
+
+RUN apt-get update && apt-get install -y xinetd
+
+RUN sage -pip install --no-cache-dir --upgrade pip
+RUN sage -pip install --no-cache-dir pycryptodome
+
+RUN mkdir /ctf
+WORKDIR /ctf
+
+RUN echo "Connection blocked." > /etc/banner_fail
+COPY ctf.xinetd /etc/xinetd.d/ctf
+
+COPY run.sh .
+COPY challenge.py .
+
+RUN chown -R root:sage /ctf && chmod -R 750 /ctf && chmod 777 /ctf/run.sh && chmod 770 /ctf
+
+CMD [ "xinetd", "-dontfork" ]
+
+EXPOSE 1337