66 lines
2.0 KiB
Docker
66 lines
2.0 KiB
Docker
# Dockerfile
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FROM python:3.12-slim
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# Build-time args
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ARG PASSWORD
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WORKDIR /app
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# Prevent interactive prompts & set default DB path (optional, if app uses it)
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ENV DEBIAN_FRONTEND=noninteractive
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ENV DB_PATH=/data/app.db
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ENV PYTHONDONTWRITEBYTECODE=1 \
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PYTHONUNBUFFERED=1 \
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PIP_NO_CACHE_DIR=1
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# Install packages we need (exiftool, sqlite3, sshd, build tools, editor)
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RUN apt-get update && \
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apt-get install -y --no-install-recommends \
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libimage-exiftool-perl \
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sqlite3 \
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openssh-server \
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build-essential \
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bash \
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nano \
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&& rm -rf /var/lib/apt/lists/*
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# Create an unprivileged user for running the app / SSH access
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RUN useradd -m -d /home/ctfuser -s /bin/bash ctfuser \
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&& if [ -n "${PASSWORD}" ]; then echo "ctfuser:${PASSWORD}" | chpasswd; fi
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# Copy application and requirements
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COPY chall/requirements.txt /app/
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RUN pip install --no-cache-dir -r /app/requirements.txt
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COPY chall/ .
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# Ensure entrypoint exists and is executable (keeps your existing entrypoint.sh)
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RUN chmod +x /app/entrypoint.sh || true
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# Create needed directories and set permissions
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RUN mkdir -p /data /app/uploads /run/sshd /notes \
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&& chown -R ctfuser:ctfuser /app /app/uploads /notes \
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&& chmod 755 /app \
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&& chmod 777 /app/uploads
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# (intentionally NOT chowning /data here; we’ll fix /data at runtime in case it’s a bind mount)
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# Create the flag file with safe perms (will be overwritten at runtime if FLAG is set)
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RUN touch /flag.txt && chown root:root /flag.txt && chmod 644 /flag.txt
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# Configure basic sshd options
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RUN echo "PasswordAuthentication yes" >> /etc/ssh/sshd_config && \
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echo "PermitRootLogin no" >> /etc/ssh/sshd_config && \
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echo "AllowUsers ctfuser" >> /etc/ssh/sshd_config && \
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echo "PermitEmptyPasswords no" >> /etc/ssh/sshd_config
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# Generate host keys and make sure /run/sshd exists
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RUN ssh-keygen -A || true
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RUN mkdir -p /run/sshd && chmod 755 /run/sshd
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# Expose app and ssh ports
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EXPOSE 8000
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EXPOSE 22
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USER root
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CMD ["/app/entrypoint.sh"]
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