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Add sha256 validation for binaries in Dockerfile #197

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Sep 13, 2025
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Add sha256 validation for binaries in Dockerfile #197

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12 changes: 9 additions & 3 deletions Dockerfile
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,9 @@ ARG DENO_DIR='/deno-dir' \
HOST='0.0.0.0' \
PORT='8282'

# sha256 checksums for binaries
ARG THC_SHA256='cb1797948015da46c222764a99ee30c06a6a9a30f5b87f212a28ea3c6d07610d' \
TINI_SHA256='93dcc18adc78c65a028a84799ecf8ad40c936fdfc5f2a57b1acda5a8117fa82c'

# we can use these aliases and let dependabot remain simple
# inspired by:
Expand All @@ -35,11 +38,12 @@ RUN DEBIAN_FRONTEND='noninteractive' && export DEBIAN_FRONTEND && \

# Download tiny-health-checker from GitHub
FROM debian-curl AS thc-download
ARG GH_BASE_URL THC_VERSION
ARG GH_BASE_URL THC_VERSION THC_SHA256
RUN arch="$(uname -m)" && \
gh_url() { printf -- "${GH_BASE_URL}/%s/releases/download/%s/%s\n" "$@" ; } && \
URL="$(gh_url dmikusa/tiny-health-checker v${THC_VERSION} tiny-health-checker-${arch}-unknown-linux-musl.tar.xz)" && \
curl -fsSL --output /tiny-health-checker-${arch}-unknown-linux-musl.tar.xz "${URL}" && \
echo "${THC_SHA256} /tiny-health-checker-${arch}-unknown-linux-musl.tar.xz" | sha256sum -c && \
tar -xvf /tiny-health-checker-${arch}-unknown-linux-musl.tar.xz && \
mv /tiny-health-checker-${arch}-unknown-linux-musl/thc /thc && \
chmod -v 00555 /thc
Expand All @@ -52,11 +56,13 @@ COPY --from=thc-download /thc /thc

# Download tini from GitHub
FROM debian-curl AS tini-download
ARG GH_BASE_URL TINI_VERSION
ARG GH_BASE_URL TINI_VERSION TINI_SHA256
RUN arch="$(dpkg --print-architecture)" && \
gh_url() { printf -- "${GH_BASE_URL}/%s/releases/download/%s/%s\n" "$@" ; } && \
URL="$(gh_url krallin/tini v${TINI_VERSION} tini-${arch})" && \
curl -fsSL --output /tini "${URL}" && chmod -v 00555 /tini
curl -fsSL --output /tini "${URL}" && \
echo "${TINI_SHA256} /tini" | sha256sum -c && \
chmod -v 00555 /tini

# Cache the tini binary as a layer
FROM scratch AS tini-bin
Expand Down