feat: add safely wrapped scan-* workflows

2026-04-10 19:05:43 +02:00
parent 3d3c7b3265
commit 6e5f62d4dd
8 changed files with 502 additions and 1 deletions
@@ -0,0 +1,82 @@
+name: "Trivy scan (filesystem)"
+description: "Run trivy filesystem in a locked-down Docker container; report is always SARIF"
+author: "Timo Behrendt <t.behrendt@t00n.de>"
+branding:
+  icon: "search"
+  color: "blue"
+
+inputs:
+  scan-path:
+    description: "Host path to the directory to scan (mounted read-only at /scan in the container)"
+    required: true
+  cache-dir:
+    description: "Host path to the Trivy cache directory (mounted read-only at /cache; use the same path as setup-db)"
+    required: false
+    default: "${{ runner.temp }}/trivy"
+  output-dir:
+    description: "Host directory where the report file is written (mounted read-write at /out)"
+    required: true
+  output-file:
+    description: "SARIF report file name only (no slashes); written under output-dir"
+    required: true
+  trivy-version:
+    description: "Trivy Docker image reference (digest pin recommended)"
+    required: false
+    default: "ghcr.io/aquasecurity/trivy:0.69.3@sha256:bcc376de8d77cfe086a917230e818dc9f8528e3c852f7b1aff648949b6258d1c"
+
+outputs:
+  output-path:
+    description: "Host path to the generated report file"
+    value: ${{ steps.scan.outputs.output-path }}
+
+runs:
+  using: "composite"
+  steps:
+    - id: scan
+      shell: bash
+      env:
+        SCAN_PATH_IN: ${{ inputs.scan-path }}
+        CACHE_DIR_IN: ${{ inputs.cache-dir }}
+        OUTPUT_DIR_IN: ${{ inputs.output-dir }}
+        OUTPUT_FILE: ${{ inputs.output-file }}
+        TRIVY_IMAGE: ${{ inputs.trivy-version }}
+      run: |
+        set -euo pipefail
+        case "$OUTPUT_FILE" in */*|".."*) echo "FAIL: output-file must be a single file name (no path separators)"; exit 1 ;; esac
+        scan_path=$(realpath "$SCAN_PATH_IN")
+        cache_dir=$(realpath "$CACHE_DIR_IN")
+        mkdir -p "$OUTPUT_DIR_IN"
+        output_dir=$(realpath "$OUTPUT_DIR_IN")
+        test -d "$scan_path" || { echo "FAIL: scan-path is not a directory: $scan_path"; exit 1; }
+        test -d "$cache_dir" || { echo "FAIL: cache-dir is not a directory: $cache_dir"; exit 1; }
+
+        docker run --rm \
+          --name trivy-scan-fs \
+          --user "$(id -u):$(id -g)" \
+          --read-only \
+          --env-file /dev/null \
+          --cap-drop ALL \
+          --pids-limit 64 \
+          --memory=512m \
+          --memory-swap=512m \
+          --cpus=1 \
+          --ipc private \
+          --cgroupns private \
+          --security-opt no-new-privileges \
+          --security-opt apparmor=docker-default \
+          --tmpfs /tmp:rw,noexec,nosuid,nodev,size=1g \
+          --network none \
+          --mount type=bind,src="$scan_path",dst=/scan,ro \
+          --mount type=bind,src="$cache_dir",dst=/cache,ro \
+          --mount type=bind,src="$output_dir",dst=/out \
+          "$TRIVY_IMAGE" \
+          filesystem /scan \
+          --cache-dir /cache \
+          --skip-db-update \
+          --skip-check-update \
+          --offline-scan \
+          --format sarif \
+          --exit-code 0 \
+          -o "/out/$OUTPUT_FILE"
+
+        echo "output-path=$output_dir/$OUTPUT_FILE" >> "$GITHUB_OUTPUT"