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ci(native-arch): verify the Go tarball before running the compiler out of it #781

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Merged
tannevaled merged 2 commits into from
Oct 4, 2026
Merged

ci(native-arch): verify the Go tarball before running the compiler out of it #781

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d6c0b7b
ci(native-arch): verify the Go tarball before running the compiler ou…
tannevaled Oct 4, 2026
141bdb7
Merge remote-tracking branch 'origin/main' into wave62-verify-go-tarball
tannevaled Oct 4, 2026
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60 changes: 58 additions & 2 deletions .github/workflows/native-arch.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -193,7 +193,35 @@ jobs:
workdir="$(mktemp -d)"
tarball="go${GOVER}.linux-${GOARCH}.tar.gz"
echo "== fetching $tarball"
( cd "$workdir" && curl -fsSL "https://go.dev/dl/${tarball}" -o "$tarball" && tar -xzf "$tarball" )
curl -fsSL "https://go.dev/dl/${tarball}" -o "$workdir/$tarball"

# Verify before executing anything out of it. These sums are the ones
# published at https://go.dev/dl/?mode=json for this GO_VERSION, and
# they live HERE, in the repository, rather than being fetched next to
# the tarball: a checksum served from the same origin as the file it
# describes cannot attest to that file. Bumping GO_VERSION means
# updating these, and the `*)` arm below is what says so out loud
# instead of silently skipping the check.
case "${GOVER}/${GOARCH}" in
1.26.4/ppc64le) want=53f49b8c7eace2d30389327b4a516b13321f90377fdf5929a6b63174609bc22e ;;
1.26.4/riscv64) want=2b9ba137baaa3031fd74330cb36ab54c5abe380867ca9fbab7c552f3db740555 ;;
1.26.4/s390x) want=1e12a2318f3dd4c57027c865f6cb51f5d1e36b02d10f3e6316ce7b61a27b3ca1 ;;
*)
echo "== no pinned SHA256 for go${GOVER} on ${GOARCH}"
echo "== add it from https://go.dev/dl/?mode=json; refusing to run an unverified toolchain"
exit 1
;;
esac
got="$(sha256sum "$workdir/$tarball" | cut -d' ' -f1)"
if [ "$got" != "$want" ]; then
echo "== SHA256 mismatch for $tarball"
echo "== want $want"
echo "== got $got"
exit 1
fi
echo "== $tarball sha256 verified"

( cd "$workdir" && tar -xzf "$tarball" )
export PATH="$workdir/go/bin:$PATH"
export GOROOT="$workdir/go"
fi
Expand Down Expand Up @@ -283,7 +311,35 @@ jobs:
workdir="$(mktemp -d)"
tarball="go${GOVER}.linux-${GOARCH}.tar.gz"
echo "== fetching $tarball"
( cd "$workdir" && curl -fsSL "https://go.dev/dl/${tarball}" -o "$tarball" && tar -xzf "$tarball" )
curl -fsSL "https://go.dev/dl/${tarball}" -o "$workdir/$tarball"

# Verify before executing anything out of it. These sums are the ones
# published at https://go.dev/dl/?mode=json for this GO_VERSION, and
# they live HERE, in the repository, rather than being fetched next to
# the tarball: a checksum served from the same origin as the file it
# describes cannot attest to that file. Bumping GO_VERSION means
# updating these, and the `*)` arm below is what says so out loud
# instead of silently skipping the check.
case "${GOVER}/${GOARCH}" in
1.26.4/ppc64le) want=53f49b8c7eace2d30389327b4a516b13321f90377fdf5929a6b63174609bc22e ;;
1.26.4/riscv64) want=2b9ba137baaa3031fd74330cb36ab54c5abe380867ca9fbab7c552f3db740555 ;;
1.26.4/s390x) want=1e12a2318f3dd4c57027c865f6cb51f5d1e36b02d10f3e6316ce7b61a27b3ca1 ;;
*)
echo "== no pinned SHA256 for go${GOVER} on ${GOARCH}"
echo "== add it from https://go.dev/dl/?mode=json; refusing to run an unverified toolchain"
exit 1
;;
esac
got="$(sha256sum "$workdir/$tarball" | cut -d' ' -f1)"
if [ "$got" != "$want" ]; then
echo "== SHA256 mismatch for $tarball"
echo "== want $want"
echo "== got $got"
exit 1
fi
echo "== $tarball sha256 verified"

( cd "$workdir" && tar -xzf "$tarball" )
export PATH="$workdir/go/bin:$PATH"
export GOROOT="$workdir/go"
fi
Expand Down
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