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Enhance SLSA provenance generation: add file hash generation and separate job for provenance #16

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Merged
michaelbeale-IL merged 1 commit into from
Feb 3, 2026
Merged

Enhance SLSA provenance generation: add file hash generation and separate job for provenance #16

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41 changes: 34 additions & 7 deletions .github/workflows/release.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,8 @@ permissions:
jobs:
build-and-sign-release:
runs-on: ubuntu-latest
outputs:
digests: ${{ steps.hash.outputs.digests }}
steps:
- name: Checkout code
uses: actions/checkout@v4
Expand All @@ -45,6 +47,25 @@ jobs:
run: |
uv build

- name: Generate file hashes for SLSA
shell: bash
id: hash
run: |
set -euo pipefail

# Generate SHA256 digests for all built artifacts
(
cd dist/
for file in *; do
if [ -f "$file" ]; then
echo "$file:$(sha256sum "$file" | head -c 64)"
fi
done
) > checksums

# Create base64-encoded subjects for SLSA
echo "digests=$(cat checksums | base64 -w0)" >> "$GITHUB_OUTPUT"

- name: Install cosign
uses: sigstore/cosign-installer@v3
with:
Expand Down Expand Up @@ -121,12 +142,6 @@ jobs:
fi
done

- name: Generate SLSA provenance
uses: slsa-framework/slsa-github-generator/.github/workflows/generator_generic_slsa3.yml@v2.0.0
with:
base64-subjects: |
${{ hashFiles('dist/*') }}

- name: Update release with security information
run: |
# Create a security attestation file
Expand Down Expand Up @@ -207,4 +222,16 @@ jobs:
cosign sign-blob --bundle "${file}.sig" "$file"
echo "Signed $file"
fi
done
done

# Generate SLSA provenance as a separate job
provenance:
needs: [build-and-sign-release]
permissions:
actions: read # To read the workflow path
id-token: write # To sign the provenance
contents: write # To add assets to a release
uses: slsa-framework/slsa-github-generator/.github/workflows/generator_generic_slsa3.yml@v2.0.0
with:
base64-subjects: "${{ needs.build-and-sign-release.outputs.digests }}"
upload-assets: true # upload to a new release
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