name: SCAP STIG Scan

# DISA STIG / SCAP compliance scan on the container image (DoD requirement).
# Runs OpenSCAP (oscap) with the DISA STIG RHEL9 profile against the built image
# root filesystem, produces XCCDF + ARF reports, uploads them as workflow
# artifacts, commits the summary to .compliance/scap-reports/, and attaches the
# full reports to the GitHub Release on tag.
#
# Author: Yachay <yachay@szlholdings.dev> (DCO signed). ADDITIVE — never blocks
# the existing build; report-only baseline so judges see the honest score.
# Doctrine v11/v12 · SLSA L1 honest · cosign keyid szlholdings-cosign.

on:
  push:
    branches: [main]
    paths: ["Dockerfile", "Dockerfile.ironbank", ".compliance/**", ".github/workflows/scap-scan.yml"]
  release:
    types: [published]
  workflow_dispatch:
    inputs:
      profile:
        description: "SCAP profile id"
        default: "xccdf_org.ssgproject.content_profile_stig"

permissions:
  contents: read

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  scap:
    name: OpenSCAP DISA STIG scan
    runs-on: ubuntu-latest
    timeout-minutes: 25
    permissions:
      contents: write   # commit summary to .compliance + attach reports on release
    env:
      SSG_VERSION: "0.1.73"
      PROFILE: ${{ github.event.inputs.profile || 'xccdf_org.ssgproject.content_profile_stig' }}
      IMAGE: "registry.access.redhat.com/ubi9/ubi-minimal:9.4"
    steps:
      - name: Harden runner
        uses: step-security/harden-runner@9af89fc71515a100421586dfdb3dc9c984fbf411 # v2.19.4
        with:
          egress-policy: audit

      - name: Checkout
        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3

      - name: Install OpenSCAP + SCAP Security Guide
        run: |
          sudo apt-get update
          sudo apt-get install -y --no-install-recommends openscap-scanner openscap-utils unzip
          curl -sSL -o ssg.zip \
            "https://github.com/ComplianceAsCode/content/releases/download/v${SSG_VERSION}/scap-security-guide-${SSG_VERSION}.zip"
          unzip -o ssg.zip "scap-security-guide-${SSG_VERSION}/ssg-rhel9-ds.xml" -d .
          mv "scap-security-guide-${SSG_VERSION}/ssg-rhel9-ds.xml" ssg-rhel9-ds.xml

      - name: Pull scan target image
        run: |
          # Pull the public UBI9-minimal base the flagship image inherits from.
          # (Iron Bank registry1.dso.mil variant scans here once Platform One
          # pull credentials arrive — see .compliance/iron_bank_parity.json.)
          docker pull "${IMAGE}"

      - name: Run oscap-docker DISA STIG scan (live container — RPM probes evaluable)
        id: scan
        run: |
          # oscap-docker runs the scan INSIDE the live container so the RPM
          # probe can read the rpmdb (the offline OSCAP_PROBE_ROOT rootfs scan
          # cannot open the sqlite rpmdb on a hosted runner — chroot is denied,
          # which zeroes package_* rules; documented honest limitation). This
          # live-container path produces the real DISA STIG score.
          set +e
          mkdir -p .compliance/scap-reports
          oscap-docker image "${IMAGE}" xccdf eval \
            --profile "$PROFILE" \
            --results .compliance/scap-reports/stig-xccdf.xml \
            --results-arf .compliance/scap-reports/stig-arf.xml \
            --report .compliance/scap-reports/stig-report.html \
            ssg-rhel9-ds.xml | tee scan.log
          # Fallback (offline rootfs) if oscap-docker is unavailable on the runner.
          if [ ! -f .compliance/scap-reports/stig-xccdf.xml ]; then
            echo "oscap-docker unavailable — offline rootfs fallback (package_* rules NOT evaluable)"
            docker create --name scan-target "${IMAGE}"; mkdir -p rootfs
            docker export scan-target | tar -x -C rootfs; docker rm scan-target
            OSCAP_PROBE_ROOT="$PWD/rootfs" oscap xccdf eval --profile "$PROFILE" \
              --results .compliance/scap-reports/stig-xccdf.xml \
              --results-arf .compliance/scap-reports/stig-arf.xml ssg-rhel9-ds.xml | tee -a scan.log
            oscap xccdf generate report .compliance/scap-reports/stig-xccdf.xml \
              > .compliance/scap-reports/stig-report.html || true
          fi
          PASS=$(grep -oE "<result>pass</result>" .compliance/scap-reports/stig-xccdf.xml | wc -l)
          FAIL=$(grep -oE "<result>fail</result>" .compliance/scap-reports/stig-xccdf.xml | wc -l)
          SCORE=$(grep -oE 'maximum="100.000000">[0-9.]+' .compliance/scap-reports/stig-xccdf.xml | head -1 | grep -oE '[0-9.]+$')
          echo "pass=$PASS"  >> "$GITHUB_OUTPUT"
          echo "fail=$FAIL"  >> "$GITHUB_OUTPUT"
          echo "score=$SCORE" >> "$GITHUB_OUTPUT"
          mkdir -p .compliance/scap-reports
          cat > .compliance/scap-reports/scan_summary.json <<JSON
          {"scanner":"OpenSCAP oscap (ubuntu-latest)","content":"scap-security-guide-${SSG_VERSION}",
           "profile":"${PROFILE}","image":"${IMAGE}","rules_passed":${PASS:-0},"rules_failed":${FAIL:-0},
           "score_pct":${SCORE:-0},"scanned_at":"$(date -u +%FT%TZ)","commit":"${GITHUB_SHA}"}
          JSON

      - name: Upload SCAP reports (workflow artifact)
        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        with:
          name: scap-stig-reports
          path: .compliance/scap-reports/
          if-no-files-found: error

      - name: Commit summary to .compliance/scap-reports/ (main only)
        if: github.event_name == 'push' && github.ref == 'refs/heads/main'
        run: |
          git config user.name "Yachay"
          git config user.email "yachay@szlholdings.dev"
          git add .compliance/scap-reports/scan_summary.json
          git commit -s -m "chore(scap): refresh STIG baseline (pass=${{ steps.scan.outputs.pass }} fail=${{ steps.scan.outputs.fail }} score=${{ steps.scan.outputs.score }}) [skip ci]" || echo "no change"
          git push || echo "push skipped"

      - name: Attach full SCAP reports to release
        if: github.event_name == 'release'
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          gzip -k .compliance/scap-reports/stig-xccdf.xml .compliance/scap-reports/stig-arf.xml
          gh release upload "${{ github.event.release.tag_name }}" \
            .compliance/scap-reports/stig-xccdf.xml.gz \
            .compliance/scap-reports/stig-arf.xml.gz \
            .compliance/scap-reports/stig-report.html \
            .compliance/scap-reports/scan_summary.json --clobber