Add SLSA provenance to releases

.github/workflows/create-prerelease-on-tag.yml

@@ -7,11 +7,13 @@ on:
 permissions:
   contents: read
 jobs:
-  build-release-publish:
+  build:
     runs-on: ubuntu-latest
     permissions:
       actions: write
       contents: write
+    outputs:
+      hashes: ${{ steps.hash.outputs.hashes }}
     steps:
       - uses: actions/checkout@v4
 
@@ -24,6 +26,12 @@ jobs:
         run: npm run-script build -- --all --yomitan-version ${{ github.ref_name }}
         shell: bash
 
+      - name: Generate hashes
+        id: hash
+        run: |
+          cd builds
+          echo "hashes=$(sha256sum * | base64 -w0)" >> "$GITHUB_OUTPUT"
+
       - name: Release
         id: release
         uses: softprops/action-gh-release@de2c0eb89ae2a093876385947365aca7b0e5f844 # [email protected]
@@ -46,3 +54,14 @@ jobs:
           token: ${{ secrets.GITHUB_TOKEN }}
           wait-for-completion: false
           inputs: '{ "upload_url": "${{ steps.release.outputs.upload_url }}" }'
+
+  provenance:
+    needs: [build]
+    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@07e64b653f10a80b6510f4568f685f8b7b9ea830
+    with:
+      base64-subjects: "${{ needs.build.outputs.hashes }}"
+      upload-assets: true

.github/workflows/publish-firefox-development.yml

@@ -12,11 +12,13 @@ on:
 permissions:
   contents: read
 jobs:
-  build-signed-xpi-asset:
+  build:
     runs-on: ubuntu-latest
     environment: cd
     permissions:
       contents: write
+    outputs:
+      hashes: ${{ steps.hash.outputs.hashes }}
     steps:
       - uses: robinraju/release-downloader@efa4cd07bd0195e6cc65e9e30c251b49ce4d3e51 # [email protected]
         with:
@@ -41,6 +43,11 @@ jobs:
           steps.ffSignXpi.outputs.sameVersionAlreadyUploadedError != 'true'
         run: exit 1
 
+      - name: Generate hashes
+        id: hash
+        run: |
+          echo "hashes=$(sha256sum yomitan-firefox-dev.xpi | base64 -w0)" >> "$GITHUB_OUTPUT"
+
       - name: Upload offline xpi release asset
         id: uploadReleaseAsset
         if: steps.ffSignXpi.outcome == 'success'
@@ -86,3 +93,14 @@ jobs:
         uses: ad-m/github-push-action@29f05e01bb17e6f28228b47437e03a7b69e1f9ef # pin@master
         with:
           branch: metadata
+
+  provenance:
+    needs: [build]
+    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@07e64b653f10a80b6510f4568f685f8b7b9ea830
+    with:
+      base64-subjects: "${{ needs.build.outputs.hashes }}"
+      upload-assets: true