feat: Add Sigstore v2/v3 compatibility verification workflow #1725
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Add automated workflow to verify Sigstore v2/v3 signature compatibility using a pre-signed OCM component from a public registry. ## Workflow: sigstore-verify-compatibility.yml Tests all 4 verification combinations: - v2 CLI verifies v2 signature (baseline) - v2 CLI verifies v3 signature (forward compatibility) - v3 CLI verifies v2 signature (backward compatibility) - v3 CLI verifies v3 signature (v3 functionality) Uses pre-signed component: ghcr.io/morri-son/ocm-test//ocm.software/sigstore-test-comp:1.0.0 This component contains two keyless signatures: - sigstore-v2: Signed with OCM CLI using Sigstore v2.6.1 - sigstore-v3: Signed with OCM CLI using Sigstore v3.0.2 ## Why verify-only? Keyless signing requires OIDC authentication (browser-based device flow): - ✅ Works locally - ❌ Does NOT work in GitHub Actions (no browser) Verification does NOT require OIDC: - ✅ Works everywhere (public key embedded in signature) - ✅ Only needs anonymous Rekor access This allows automated testing of signature verification compatibility while signing must be done manually. ## Purpose This workflow enables testing whether OCM can safely upgrade from Sigstore v2 to v3 without breaking signature compatibility. If all 4 tests pass, it proves: - Signatures created with v2 can be verified with v3 (backward compatible) - Signatures created with v3 can be verified with v2 (forward compatible) - The signature format is stable across versions On-behalf-of: Gerald Morrison (SAP) <[email protected]> Signed-off-by: Gerald Morrison (SAP) <[email protected]>
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| runs-on: ubuntu-latest | ||
| strategy: | ||
| matrix: | ||
| include: | ||
| # v2 CLI verifies v2 signature | ||
| - cli_repo: ${{ inputs.v2_repository }} | ||
| cli_ref: ${{ inputs.v2_ref }} | ||
| signature_name: "sigstore-v2" | ||
| test_name: "v2_cli_verifies_v2_signature" | ||
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| # v2 CLI verifies v3 signature | ||
| - cli_repo: ${{ inputs.v2_repository }} | ||
| cli_ref: ${{ inputs.v2_ref }} | ||
| signature_name: "sigstore-v3" | ||
| test_name: "v2_cli_verifies_v3_signature" | ||
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| # v3 CLI verifies v2 signature | ||
| - cli_repo: ${{ inputs.v3_repository }} | ||
| cli_ref: ${{ inputs.v3_ref }} | ||
| signature_name: "sigstore-v2" | ||
| test_name: "v3_cli_verifies_v2_signature" | ||
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| # v3 CLI verifies v3 signature | ||
| - cli_repo: ${{ inputs.v3_repository }} | ||
| cli_ref: ${{ inputs.v3_ref }} | ||
| signature_name: "sigstore-v3" | ||
| test_name: "v3_cli_verifies_v3_signature" | ||
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| fail-fast: false | ||
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| name: ${{ matrix.test_name }} | ||
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| steps: | ||
| - name: Checkout Repository (for pre-signed component) | ||
| uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2 | ||
| with: | ||
| path: ocm-repo | ||
| fetch-depth: 1 | ||
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| - name: Setup Go | ||
| uses: actions/setup-go@3041bf56c941b39c61721a86cd11f3bb1338122a # v5.2.0 | ||
| with: | ||
| go-version: '1.25.4' | ||
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| - name: Checkout OCM CLI | ||
| uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2 | ||
| with: | ||
| repository: ${{ matrix.cli_repo }} | ||
| ref: ${{ matrix.cli_ref }} | ||
| path: ocm-cli | ||
| fetch-depth: 1 | ||
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| - name: Build OCM CLI | ||
| run: | | ||
| echo "Building OCM CLI for verification" | ||
| echo " Repository: ${{ matrix.cli_repo }}" | ||
| echo " Reference: ${{ matrix.cli_ref }}" | ||
| cd ocm-cli | ||
| make install | ||
| ocm version | ||
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| - name: Verify Pre-signed Component | ||
| env: | ||
| COSIGN_EXPERIMENTAL: "1" | ||
| run: | | ||
| echo "Verifying signature: ${{ matrix.signature_name }}" | ||
| echo "Using CLI: ${{ matrix.cli_repo }}@${{ matrix.cli_ref }}" | ||
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| ocm verify cv \ | ||
| --signature ${{ matrix.signature_name }} \ | ||
| --keyless \ | ||
| ghcr.io/morri-son/ocm-test//ocm.software/sigstore-test-comp:1.0.0 | ||
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| echo "✅ Verification successful!" | ||
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| - name: Display Component Info | ||
| if: always() | ||
| run: | | ||
| echo "=== Component Details ===" | ||
| ocm get cv ghcr.io/morri-son/ocm-test//ocm.software/sigstore-test-comp:1.0.0 -oyaml | ||
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| - name: Test Result Summary | ||
| if: success() | ||
| run: | | ||
| echo "✅ SUCCESS: ${{ matrix.test_name }}" | ||
| echo "" | ||
| echo "CLI:" | ||
| echo " Repository: ${{ matrix.cli_repo }}" | ||
| echo " Reference: ${{ matrix.cli_ref }}" | ||
| echo "" | ||
| echo "Signature: ${{ matrix.signature_name }}" | ||
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| summary: |
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| needs: verify-compatibility | ||
| runs-on: ubuntu-latest | ||
| if: always() | ||
| steps: | ||
| - name: Generate Test Summary | ||
| run: | | ||
| echo "# Sigstore Verify Compatibility Test Results" >> $GITHUB_STEP_SUMMARY | ||
| echo "" >> $GITHUB_STEP_SUMMARY | ||
| echo "## Configuration" >> $GITHUB_STEP_SUMMARY | ||
| echo "- **v2 CLI**: \`${{ inputs.v2_repository }}@${{ inputs.v2_ref }}\`" >> $GITHUB_STEP_SUMMARY | ||
| echo "- **v3 CLI**: \`${{ inputs.v3_repository }}@${{ inputs.v3_ref }}\`" >> $GITHUB_STEP_SUMMARY | ||
| echo "" >> $GITHUB_STEP_SUMMARY | ||
| echo "## Test Matrix" >> $GITHUB_STEP_SUMMARY | ||
| echo "" >> $GITHUB_STEP_SUMMARY | ||
| echo "Tests verification of pre-signed components:" >> $GITHUB_STEP_SUMMARY | ||
| echo "- **sigstore-v2**: Signed with Sigstore v2" >> $GITHUB_STEP_SUMMARY | ||
| echo "- **sigstore-v3**: Signed with Sigstore v3" >> $GITHUB_STEP_SUMMARY | ||
| echo "" >> $GITHUB_STEP_SUMMARY | ||
| echo "## Results" >> $GITHUB_STEP_SUMMARY | ||
| echo "" >> $GITHUB_STEP_SUMMARY | ||
| echo "| CLI Version | Signature | Status |" >> $GITHUB_STEP_SUMMARY | ||
| echo "|-------------|-----------|--------|" >> $GITHUB_STEP_SUMMARY | ||
| echo "| v2 | sigstore-v2 | ${{ needs.verify-compatibility.result == 'success' && '✅' || '❌' }} |" >> $GITHUB_STEP_SUMMARY | ||
| echo "| v2 | sigstore-v3 | ${{ needs.verify-compatibility.result == 'success' && '✅' || '❌' }} |" >> $GITHUB_STEP_SUMMARY | ||
| echo "| v3 | sigstore-v2 | ${{ needs.verify-compatibility.result == 'success' && '✅' || '❌' }} |" >> $GITHUB_STEP_SUMMARY | ||
| echo "| v3 | sigstore-v3 | ${{ needs.verify-compatibility.result == 'success' && '✅' || '❌' }} |" >> $GITHUB_STEP_SUMMARY | ||
| echo "" >> $GITHUB_STEP_SUMMARY | ||
| echo "## Note" >> $GITHUB_STEP_SUMMARY | ||
| echo "" >> $GITHUB_STEP_SUMMARY | ||
| echo "This workflow tests **verification only** using pre-signed components." >> $GITHUB_STEP_SUMMARY | ||
| echo "Signing tests must be performed manually due to OIDC requirements." >> $GITHUB_STEP_SUMMARY | ||
| echo "See \`.github/test-data/README.md\` for manual signing instructions." >> $GITHUB_STEP_SUMMARY |
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5 tasks
auto-merge was automatically disabled
January 8, 2026 07:56
Pull request was converted to draft
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On-behalf-of: Gerald Morrison (SAP) [email protected]
What this PR does / why we need it
Add automated workflow to verify Sigstore v2/v3 signature compatibility using a pre-signed OCM component from a public registry.
Workflow: sigstore-verify-compatibility.yml
Tests all 4 verification combinations:
Uses pre-signed component:
ghcr.io/morri-son/ocm-test//ocm.software/sigstore-test-comp:1.0.0
This component contains two keyless signatures: