Update README.md #1
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| name: TOCTOU Pattern | |
| on: | |
| pull_request_target: | |
| types: [labeled] | |
| permissions: {} # No permissions by default | |
| jobs: | |
| vulnerable-pattern: | |
| # DO NOT USE THIS PATTERN - It is vulnerable to TOCTOU | |
| if: github.event.label.name == 'approved' | |
| runs-on: ubuntu-latest | |
| permissions: | |
| contents: read | |
| pull-requests: read | |
| steps: | |
| - uses: actions/checkout@v4 | |
| - name: Wait for demo purposes | |
| run: | | |
| echo "Waiting 2 minutes to allow push of new commit..." | |
| sleep 120 | |
| # VULNERABLE: Could get different code than what was approved | |
| - name: Checkout PR (Vulnerable) | |
| run: | | |
| gh pr checkout ${{ github.event.pull_request.number }} | |
| # Show what we got | |
| echo "Commit we got:" | |
| git rev-parse HEAD | |
| echo "Content of README.md:" | |
| cat README.md | |
| secure-pattern: | |
| # USE THIS PATTERN - It is secure against TOCTOU | |
| if: github.event.label.name == 'approved' | |
| runs-on: ubuntu-latest | |
| permissions: | |
| contents: read | |
| pull-requests: read | |
| steps: | |
| - uses: actions/checkout@v4 | |
| - name: Wait for demo purposes | |
| run: | | |
| echo "Waiting 2 minutes to allow push of new commit..." | |
| sleep 120 | |
| # SECURE: Gets exactly the code that was approved | |
| - name: Checkout PR (Secure) | |
| run: | | |
| gh pr checkout ${{ github.event.pull_request.number }} --commit ${{ github.event.pull_request.head.sha }} | |
| # Show what we got | |
| echo "Commit we got:" | |
| git rev-parse HEAD | |
| echo "Content of README.md:" | |
| cat README.md |