claude-re-setup/Dockerfile

FROM ubuntu:24.04

ARG DEBIAN_FRONTEND=noninteractive
# Match the host user so files written to mounted volumes keep the right owner.
ARG USER_NAME=re
ARG USER_UID=1000
ARG USER_GID=1000

# Fingerprint of Anthropic's apt signing key, from the official install docs:
# https://code.claude.com/docs/en/desktop-linux
ARG ANTHROPIC_APT_FPR=31DDDE24DDFAB679F42D7BD2BAA929FF1A7ECACE

RUN apt-get update \
 && apt-get install -y --no-install-recommends ca-certificates curl gnupg \
 && rm -rf /var/lib/apt/lists/*

# Add Anthropic's apt repository and refuse to continue if the key is wrong.
RUN curl -fsSLo /usr/share/keyrings/claude-desktop-archive-keyring.asc \
        https://downloads.claude.ai/claude-desktop/key.asc \
 && gpg --show-keys --with-colons /usr/share/keyrings/claude-desktop-archive-keyring.asc \
        | grep -q "^fpr:::::::::${ANTHROPIC_APT_FPR}:" \
 && echo "deb [arch=amd64,arm64 signed-by=/usr/share/keyrings/claude-desktop-archive-keyring.asc] https://downloads.claude.ai/claude-desktop/apt/stable stable main" \
        > /etc/apt/sources.list.d/claude-desktop.list

# Recommends are skipped: they pull in QEMU/OVMF for Cowork, which needs KVM
# and isn't useful in this container. No keyring is installed: sign-in is not
# kept between runs. x11-utils provides the display check tools.
RUN apt-get update \
 && apt-get install -y --no-install-recommends \
        claude-desktop \
        x11-utils \
        xauth \
        fonts-dejavu-core \
 && rm -rf /var/lib/apt/lists/*

# Ghidra from the official GitHub release, checked against the SHA-256 in the
# release notes: https://github.com/NationalSecurityAgency/ghidra/releases
# Ghidra 12.2 needs JDK 25 (application.java.min=25). The full JDK, not the
# headless one, because Ghidra's GUI needs the AWT/X11 libraries.
ARG GHIDRA_VERSION=12.2
ARG GHIDRA_BUILD_DATE=20261016
ARG GHIDRA_SHA256=2c2cd776db3c1f6a097ba418922378ac3649cadd5e844a6f5f088ae628a7be67
RUN apt-get update \
 && apt-get install -y --no-install-recommends openjdk-25-jdk unzip \
 && rm -rf /var/lib/apt/lists/* \
 && curl -fsSLo /tmp/ghidra.zip \
        "https://github.com/NationalSecurityAgency/ghidra/releases/download/Ghidra_${GHIDRA_VERSION}_build/ghidra_${GHIDRA_VERSION}_PUBLIC_${GHIDRA_BUILD_DATE}.zip" \
 && echo "${GHIDRA_SHA256}  /tmp/ghidra.zip" | sha256sum -c - \
 && unzip -q /tmp/ghidra.zip -d /opt \
 && rm /tmp/ghidra.zip \
 && ln -s "/opt/ghidra_${GHIDRA_VERSION}_PUBLIC" /opt/ghidra \
 && ln -s /opt/ghidra/ghidraRun /usr/local/bin/ghidra
ENV GHIDRA_INSTALL_DIR=/opt/ghidra

# Enable the "Developer" plugin package (File > Configure > Developer) in the
# CodeBrowser. Ghidra copies its default tools into the user's settings on
# first start, and settings are reset on every container start, so the
# default CodeBrowser.tool inside the jar is patched instead of user config.
# A bare <PACKAGE NAME="Developer" /> only adds the package's RELEASED
# plugins; the snippet also lists the STABLE ones. The build fails if the
# snippet could not be inserted.
COPY ghidra/codebrowser-developer.xml /tmp/codebrowser-developer.xml
RUN set -e; cd /tmp \
 && jar_file=/opt/ghidra/Ghidra/Configurations/Public_Release/lib/Public_Release.jar \
 && unzip -q "$jar_file" defaultTools/CodeBrowser.tool \
 && awk 'FNR==NR { snip = snip $0 "\n"; next } !done && /<ROOT_NODE/ { printf "%s", snip; done = 1 } { print }' \
        /tmp/codebrowser-developer.xml defaultTools/CodeBrowser.tool > /tmp/CodeBrowser.tool \
 && mv /tmp/CodeBrowser.tool defaultTools/CodeBrowser.tool \
 && grep -q 'FidDebugPlugin' defaultTools/CodeBrowser.tool \
 && jar uf "$jar_file" defaultTools/CodeBrowser.tool \
 && rm -r /tmp/defaultTools /tmp/codebrowser-developer.xml

# Ubuntu 24.04 ships a default "ubuntu" user on UID 1000; replace it.
RUN if id ubuntu >/dev/null 2>&1; then userdel -r ubuntu; fi \
 && groupadd -g "${USER_GID}" "${USER_NAME}" \
 && useradd -m -u "${USER_UID}" -g "${USER_GID}" -s /bin/bash "${USER_NAME}" \
 && install -d -o "${USER_UID}" -g "${USER_GID}" /workspace \
 && ln -s /workspace "/home/${USER_NAME}/workspace" \
 && install -d -o "${USER_UID}" -g "${USER_GID}" \
        "/home/${USER_NAME}/.config" \
        "/home/${USER_NAME}/.config/ghidra" \
        "/home/${USER_NAME}/.config/ghidra/ghidra_${GHIDRA_VERSION}_PUBLIC"

# Ghidra's project window has no default config to patch; it builds one in
# code and saves it on exit. So a starting FrontEndTool.xml with the Developer
# plugins is put in the user settings. Pre-creating the settings dir makes
# Ghidra ask for its user agreement, which it otherwise accepts by itself on
# a fresh start, so preferences carries the same USER_AGREEMENT=ACCEPT.
COPY --chown=${USER_UID}:${USER_GID} ghidra/FrontEndTool.xml ghidra/preferences \
     /home/${USER_NAME}/.config/ghidra/ghidra_${GHIDRA_VERSION}_PUBLIC/

COPY --chmod=755 launch-apps.sh /usr/local/bin/launch-apps

USER ${USER_NAME}
WORKDIR /home/${USER_NAME}

# launch-apps starts Claude Desktop and Ghidra and stops both (and so the
# container) when either one is closed.
# No keyring: tell Electron not to look for one. Session data lives only in
# the container's filesystem, which is discarded on exit (run with --rm), so
# the user signs in on every start.
# --no-sandbox: Docker's default seccomp profile blocks the namespaces
# Chromium's sandbox needs, so the zygote dies on start. The container's own
# seccomp/namespaces stay in place as the boundary to the host instead.
CMD ["launch-apps", "--password-store=basic", "--no-sandbox"]