TSA #7
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| --- | |
| name: TSA | |
| on: workflow_dispatch | |
| permissions: {} | |
| jobs: | |
| probe-tsa: | |
| runs-on: ubuntu-latest | |
| steps: | |
| - name: Create artifact | |
| run: | | |
| date > artifact | |
| - name: Digest artifact | |
| run: | | |
| # SHA256 digest in base64 | |
| cat artifact | shasum -a 256 | | |
| cut -d ' ' -f 1 | xxd -revert -plain | base64 > digest | |
| - name: Request timestamp | |
| run: | | |
| jq --raw-input \ | |
| '{"hashAlgorithm":"sha256","certificates":true,"artifactHash":.}' \ | |
| digest > payload.json | |
| curl --silent --fail-with-body \ | |
| --header "Content-Type: application/json" \ | |
| --data @payload.json \ | |
| "https://timestamp.githubapp.com/api/v1/timestamp" | | |
| tee response.tsr | |
| - name: Dump timestamp | |
| run: | | |
| openssl ts -reply -in response.tsr -text | |
| - name: Get certificate chain | |
| run: | | |
| curl --silent --fail-with-body \ | |
| --output certchain.pem \ | |
| "https://timestamp.githubapp.com/api/v1/timestamp/certchain" | |
| - name: Verify timestamp | |
| run: | | |
| openssl ts -verify \ | |
| -data ./artifact \ | |
| -in ./response.tsr \ | |
| -CAfile ./certchain.pem |