basic trufflehog scanning (#129)

.github/workflows/secret-scan.yml

@@ -0,0 +1,73 @@
+name: Secret Scan
+
+on: [pull_request]
+
+jobs:
+  secret-scan:
+    name: Secret Scan
+    runs-on: ubuntu-latest
+    permissions:
+      contents: "read"
+
+    outputs:
+      branch: ${{ steps.fetch_depth.outputs.branch }}
+      depth: ${{ steps.fetch_depth.outputs.depth }}
+      latest_release: ${{ steps.trufflehog_release.outputs.latest_release }}
+      latest_tag_name: ${{ steps.trufflehog_release.outputs.latest_tag_name }}
+
+    steps:
+      - name: Set fetch depth
+        id: fetch_depth
+        shell: bash
+        run: |
+          if [ "${{ github.event_name }}" == "push" ]; then
+            echo "depth=$(($(jq length <<< '${{ toJson(github.event.commits) }}') + 2))" >> "$GITHUB_OUTPUT"
+            echo "branch=${{ github.ref_name }}" >> "$GITHUB_OUTPUT"
+          fi
+          if [ "${{ github.event_name }}" == "pull_request" ]; then
+            echo "depth=$((${{ github.event.pull_request.commits }}+2))" >> "$GITHUB_OUTPUT"
+            echo "branch=${{ github.event.pull_request.head.ref }}" >> "$GITHUB_OUTPUT"
+          fi
+
+      - name: Checkout Code
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ steps.fetch_depth.outputs.branch }}
+          fetch-depth: ${{ steps.fetch_depth.outputs.depth }}
+
+      - name: Install Cosign
+        uses: sigstore/cosign-installer@v3.5.0
+
+      - name: Get latest TruffleHog release
+        id: trufflehog_release
+        shell: bash
+        run: |
+          LATEST_TAG_NAME=$(curl -s https://api.github.com/repos/trufflesecurity/trufflehog/releases/latest | jq -r .name)
+          LATEST_RELEASE=$(echo ${LATEST_TAG_NAME:1})
+          echo "latest_tag_name=$LATEST_TAG_NAME" >> "$GITHUB_OUTPUT"
+          echo "latest_release=$LATEST_RELEASE" >> "$GITHUB_OUTPUT"
+
+      - name: Download and verify TruffleHog release
+        run: |
+          curl -sLO https://github.com/trufflesecurity/trufflehog/releases/download/${{ steps.trufflehog_release.outputs.latest_tag_name }}/trufflehog_${{ steps.trufflehog_release.outputs.latest_release }}_checksums.txt
+          curl -sLO https://github.com/trufflesecurity/trufflehog/releases/download/${{ steps.trufflehog_release.outputs.latest_tag_name }}/trufflehog_${{ steps.trufflehog_release.outputs.latest_release }}_checksums.txt.pem
+          curl -sLO https://github.com/trufflesecurity/trufflehog/releases/download/${{ steps.trufflehog_release.outputs.latest_tag_name }}/trufflehog_${{ steps.trufflehog_release.outputs.latest_release }}_checksums.txt.sig
+          curl -sLO https://github.com/trufflesecurity/trufflehog/releases/download/${{ steps.trufflehog_release.outputs.latest_tag_name }}/trufflehog_${{ steps.trufflehog_release.outputs.latest_release }}_linux_amd64.tar.gz
+
+          cosign verify-blob trufflehog_${{ steps.trufflehog_release.outputs.latest_release }}_checksums.txt \
+            --certificate trufflehog_${{ steps.trufflehog_release.outputs.latest_release }}_checksums.txt.pem \
+            --signature trufflehog_${{ steps.trufflehog_release.outputs.latest_release }}_checksums.txt.sig \
+            --certificate-identity-regexp 'https://github\.com/trufflesecurity/trufflehog/\.github/workflows/.+' \
+            --certificate-oidc-issuer "https://token.actions.githubusercontent.com"
+
+          sha256sum --ignore-missing -c trufflehog_${{ steps.trufflehog_release.outputs.latest_release }}_checksums.txt 
+
+
+      - name: Extract TruffleHog
+        run: |
+          tar xzf trufflehog_${{ steps.trufflehog_release.outputs.latest_release }}_linux_amd64.tar.gz -C /usr/local/bin
+          chmod +x /usr/local/bin/trufflehog
+
+      - name: Run TruffleHog scan
+        run: |
+          trufflehog git file://. --only-verified --github-actions --fail