feat: add SBOM generation and attestation to GitHub workflow (coder#17277)

Move SBOM generation and attestation to GitHub workflow

This PR moves the SBOM generation and attestation process from the `build_docker.sh` script to the GitHub workflow. The change:

1. Removes SBOM generation and attestation from the `build_docker.sh` script
2. Adds a new "SBOM Generation and Attestation" step in the GitHub workflow
3. Generates and attests SBOMs for both multi-arch images and latest tags when applicable

This approach ensures SBOM generation happens once for the final multi-architecture image rather than for each architecture separately.

Change-Id: I2e15d7322ddec933bbc9bd7880abba9b0842719f
Signed-off-by: Thomas Kosiewski <tk@coder.com>

Author: ThomasK33

.github/workflows/ci.yaml

@@ -1180,6 +1180,33 @@ jobs:
             done
           fi
 
+      - name: SBOM Generation and Attestation
+        if: github.ref == 'refs/heads/main'
+        env:
+          COSIGN_EXPERIMENTAL: 1
+        run: |
+          set -euxo pipefail
+
+          # Define image base and tags
+          IMAGE_BASE="ghcr.io/coder/coder-preview"
+          TAGS=("${{ steps.build-docker.outputs.tag }}" "main" "latest")
+
+          # Generate and attest SBOM for each tag
+          for tag in "${TAGS[@]}"; do
+            IMAGE="${IMAGE_BASE}:${tag}"
+            SBOM_FILE="coder_sbom_${tag//[:\/]/_}.spdx.json"
+
+            echo "Generating SBOM for image: ${IMAGE}"
+            syft "${IMAGE}" -o spdx-json > "${SBOM_FILE}"
+
+            echo "Attesting SBOM to image: ${IMAGE}"
+            cosign clean "${IMAGE}"
+            cosign attest --type spdxjson \
+              --predicate "${SBOM_FILE}" \
+              --yes \
+              "${IMAGE}"
+          done
+
       # GitHub attestation provides SLSA provenance for the Docker images, establishing a verifiable
       # record that these images were built in GitHub Actions with specific inputs and environment.
       # This complements our existing cosign attestations which focus on SBOMs.

.github/workflows/release.yaml

@@ -496,6 +496,39 @@ jobs:
         env:
           CODER_BASE_IMAGE_TAG: ${{ steps.image-base-tag.outputs.tag }}
 
+      - name: SBOM Generation and Attestation
+        if: ${{ !inputs.dry_run }}
+        env:
+          COSIGN_EXPERIMENTAL: "1"
+        run: |
+          set -euxo pipefail
+
+          # Generate SBOM for multi-arch image with version in filename
+          echo "Generating SBOM for multi-arch image: ${{ steps.build_docker.outputs.multiarch_image }}"
+          syft "${{ steps.build_docker.outputs.multiarch_image }}" -o spdx-json > coder_${{ steps.version.outputs.version }}_sbom.spdx.json
+
+          # Attest SBOM to multi-arch image
+          echo "Attesting SBOM to multi-arch image: ${{ steps.build_docker.outputs.multiarch_image }}"
+          cosign clean "${{ steps.build_docker.outputs.multiarch_image }}"
+          cosign attest --type spdxjson \
+            --predicate coder_${{ steps.version.outputs.version }}_sbom.spdx.json \
+            --yes \
+            "${{ steps.build_docker.outputs.multiarch_image }}"
+
+          # If latest tag was created, also attest it
+          if [[ "${{ steps.build_docker.outputs.created_latest_tag }}" == "true" ]]; then
+            latest_tag="$(./scripts/image_tag.sh --version latest)"
+            echo "Generating SBOM for latest image: ${latest_tag}"
+            syft "${latest_tag}" -o spdx-json > coder_latest_sbom.spdx.json
+
+            echo "Attesting SBOM to latest image: ${latest_tag}"
+            cosign clean "${latest_tag}"
+            cosign attest --type spdxjson \
+              --predicate coder_latest_sbom.spdx.json \
+              --yes \
+              "${latest_tag}"
+          fi
+
       - name: GitHub Attestation for Docker image
         id: attest_main
         if: ${{ !inputs.dry_run }}
@@ -612,16 +645,27 @@ jobs:
           fi
           declare -p publish_args
 
+          # Build the list of files to publish
+          files=(
+            ./build/*_installer.exe
+            ./build/*.zip
+            ./build/*.tar.gz
+            ./build/*.tgz
+            ./build/*.apk
+            ./build/*.deb
+            ./build/*.rpm
+            ./coder_${{ steps.version.outputs.version }}_sbom.spdx.json
+          )
+
+          # Only include the latest SBOM file if it was created
+          if [[ "${{ steps.build_docker.outputs.created_latest_tag }}" == "true" ]]; then
+            files+=(./coder_latest_sbom.spdx.json)
+          fi
+
           ./scripts/release/publish.sh \
             "${publish_args[@]}" \
             --release-notes-file "$CODER_RELEASE_NOTES_FILE" \
-            ./build/*_installer.exe \
-            ./build/*.zip \
-            ./build/*.tar.gz \
-            ./build/*.tgz \
-            ./build/*.apk \
-            ./build/*.deb \
-            ./build/*.rpm
+            "${files[@]}"
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           CODER_GPG_RELEASE_KEY_BASE64: ${{ secrets.GPG_RELEASE_KEY_BASE64 }}
@@ -663,6 +707,15 @@ jobs:
             ./build/*.apk
             ./build/*.deb
             ./build/*.rpm
+            ./coder_${{ steps.version.outputs.version }}_sbom.spdx.json
+          retention-days: 7
+
+      - name: Upload latest sbom artifact to actions (if dry-run)
+        if: inputs.dry_run && steps.build_docker.outputs.created_latest_tag == 'true'
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
+        with:
+          name: latest-sbom-artifact
+          path: ./coder_latest_sbom.spdx.json
           retention-days: 7
 
       - name: Send repository-dispatch event

scripts/build_docker.sh

@@ -153,17 +153,6 @@ if [[ "$push" == 1 ]]; then
 	docker push "$image_tag" 1>&2
 fi
 
-log "--- Generating SBOM for Docker image ($image_tag)"
-syft "$image_tag" -o spdx-json >"${image_tag//[:\/]/_}.spdx.json"
-
-if [[ "$push" == 1 ]]; then
-	log "--- Attesting SBOM to Docker image for $arch ($image_tag)"
-	COSIGN_EXPERIMENTAL=1 cosign clean "$image_tag"
-
-	COSIGN_EXPERIMENTAL=1 cosign attest --type spdxjson \
-		--predicate "${image_tag//[:\/]/_}.spdx.json" \
-		--yes \
-		"$image_tag"
-fi
+# SBOM generation and attestation moved to the GitHub workflow
 
 echo "$image_tag"