Docker images

Prelude

ggshield docker scanning tool (ggshield secret scan docker) is used to scan local docker images for secrets present in the image's creation process (dockerfile and build arguments) and in the image's layers' filesystem.

ggshield is a wrapper around GitGuardian API for secrets detection that requires an API key to work.

If the image is not available locally on the user's machine, GitGuardian shield will attempt to pull the image using docker pull <IMAGE_NAME>.

Preview

docker preview

Usage

Docker: scan a Docker image after exporting its filesystem and manifest with the docker save command.

Usage: ggshield secret scan docker [OPTIONS] IMAGE_NAME

  ggshield will try to pull the image if it's not available locally
Options:
  -h, --help  Show this message and exit.

Example: ggshield secret scan docker gitguardian/ggshield

Example integration (GitHub Actions)

In this example integration we build and push the ggshield image on GitHub Actions and then scan this image.

name: ci

on:
  push:
    branches:
      - 'master'

jobs:
  docker:
    runs-on: ubuntu-latest
    services:
      registry:
        image: registry:2
        ports:
          - 5000:5000

    container: gitguardian/ggshield:latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v1
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v1
        with:
          driver-opts: network=host
      - name: Build and push to local registry
        uses: docker/build-push-action@v2
        with:
          context: .
          push: true
          tags: localhost:5000/gitguardian/ggshield:latest
      - name: Scan image
        run: |
          ggshield secret scan docker localhost:5000/gitguardian/ggshield:latest