Update docker base image for trivy. (#44)

* Remove docker build step

* Update README.md

Co-authored-by: Simar <1254783+simar7@users.noreply.github.com>

Dockerfile

@@ -1,4 +1,4 @@
-FROM aquasec/trivy:latest
+FROM aquasec/trivy:0.18.0
 COPY entrypoint.sh /
 RUN apk --no-cache add bash
 RUN chmod +x /entrypoint.sh

README.md

@@ -107,10 +107,6 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v2
 
-      - name: Build an image from Dockerfile
-        run: |
-          docker build -t docker.io/my-organization/my-app:${{ github.sha }} .
-
       - name: Run Trivy vulnerability scanner in repo mode
         uses: aquasecurity/trivy-action@master
         with:
@@ -127,6 +123,152 @@ jobs:
           sarif_file: 'trivy-results.sarif'
 ```
 
+### Using Trivy to scan your private registry
+It's also possible to scan your private registry with Trivy's built-in image scan. All you have to do is set ENV vars.
+
+#### Docker Hub registry
+Docker Hub needs `TRIVY_USERNAME` and `TRIVY_PASSWORD`.
+You don't need to set ENV vars when downloading from a public repository.
+```yaml
+name: build
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-18.04
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+        
+      - name: Run Trivy vulnerability scanner
+        uses: aquasecurity/trivy-action@master
+        with:
+          image-ref: 'docker.io/my-organization/my-app:${{ github.sha }}'
+          format: 'template'
+          template: '@/contrib/sarif.tpl'
+          output: 'trivy-results.sarif'
+        env:
+          TRIVY_USERNAME: Username
+          TRIVY_PASSWORD: Password        
+
+      - name: Upload Trivy scan results to GitHub Security tab
+        uses: github/codeql-action/upload-sarif@v1
+        with:
+          sarif_file: 'trivy-results.sarif'
+```
+
+#### AWS ECR (Elastic Container Registry)
+Trivy uses AWS SDK. You don't need to install `aws` CLI tool.
+You can use [AWS CLI's ENV Vars][env-var].
+
+[env-var]: https://docs.aws.amazon.com/cli/latest/userguide/cli-configure-envvars.html
+```yaml
+name: build
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-18.04
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+        
+      - name: Run Trivy vulnerability scanner
+        uses: aquasecurity/trivy-action@master
+        with:
+          image-ref: 'aws_account_id.dkr.ecr.region.amazonaws.com/imageName:${{ github.sha }}'
+          format: 'template'
+          template: '@/contrib/sarif.tpl'
+          output: 'trivy-results.sarif'
+        env:
+          AWS_ACCESS_KEY_ID: key_id
+          AWS_SECRET_ACCESS_KEY: access_key
+          AWS_DEFAULT_REGION: us-west-2
+
+      - name: Upload Trivy scan results to GitHub Security tab
+        uses: github/codeql-action/upload-sarif@v1
+        with:
+          sarif_file: 'trivy-results.sarif'
+```
+
+#### GCR (Google Container Registry)
+Trivy uses Google Cloud SDK. You don't need to install `gcloud` command.
+
+If you want to use target project's repository, you can set it via `GOOGLE_APPLICATION_CREDENTIAL`.
+```yaml
+name: build
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-18.04
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+        
+      - name: Run Trivy vulnerability scanner
+        uses: aquasecurity/trivy-action@master
+        with:
+          image-ref: 'docker.io/my-organization/my-app:${{ github.sha }}'
+          format: 'template'
+          template: '@/contrib/sarif.tpl'
+          output: 'trivy-results.sarif'
+        env:
+          GOOGLE_APPLICATION_CREDENTIAL: /path/to/credential.json
+
+      - name: Upload Trivy scan results to GitHub Security tab
+        uses: github/codeql-action/upload-sarif@v1
+        with:
+          sarif_file: 'trivy-results.sarif'
+```
+
+#### Self-Hosted
+BasicAuth server needs `TRIVY_USERNAME` and `TRIVY_PASSWORD`.
+if you want to use 80 port, use NonSSL `TRIVY_NON_SSL=true`
+```yaml
+name: build
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-18.04
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+        
+      - name: Run Trivy vulnerability scanner
+        uses: aquasecurity/trivy-action@master
+        with:
+          image-ref: 'docker.io/my-organization/my-app:${{ github.sha }}'
+          format: 'template'
+          template: '@/contrib/sarif.tpl'
+          output: 'trivy-results.sarif'
+        env:
+          TRIVY_USERNAME: Username
+          TRIVY_PASSWORD: Password        
+
+      - name: Upload Trivy scan results to GitHub Security tab
+        uses: github/codeql-action/upload-sarif@v1
+        with:
+          sarif_file: 'trivy-results.sarif'
+```
+
 ## Customizing
 
 ### inputs
@@ -147,6 +289,8 @@ Following inputs can be used as `step.with` keys:
 | `vuln-type`      | String  | `os,library`                       | Vulnerability types (os,library)              |
 | `severity`       | String  | `UNKNOWN,LOW,MEDIUM,HIGH,CRITICAL` | Severities of vulnerabilities to be displayed |
 | `skip-dirs`       | String  |                                   | Comma separated list of directories where traversal is skipped |
+| `cache-dir`      | String  |                                    | Cache directory                               |
+| `timeout`        | String  | `2m0s`                             | Scan timeout duration                         |
 
 [release]: https://github.com/aquasecurity/trivy-action/releases/latest
 [release-img]: https://img.shields.io/github/release/aquasecurity/trivy-action.svg?logo=github

action.yaml

@@ -49,6 +49,14 @@ inputs:
     description: 'comma separated list of directories where traversal is skipped'
     required: false
     default: ''
+  cache-dir:
+    description: 'specify where the cache is stored'
+    required: false
+    default: ''
+  timeout:
+    description: 'timeout (default 2m0s)'
+    required: false
+    default: ''
 runs:
   using: 'docker'
   image: "Dockerfile"
@@ -65,3 +73,5 @@ runs:
     - '-j ${{ inputs.scan-ref }}'
     - '-k ${{ inputs.skip-dirs }}'
     - '-l ${{ inputs.input }}'
+    - '-m ${{ inputs.cache-dir }}'
+    - '-n ${{ inputs.timeout }}'

entrypoint.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 set -e
-while getopts "a:b:c:d:e:f:g:h:i:j:k:l:" o; do
+while getopts "a:b:c:d:e:f:g:h:i:j:k:l:m:n:" o; do
    case "${o}" in
        a)
          export scanType=${OPTARG}
@@ -38,6 +38,12 @@ while getopts "a:b:c:d:e:f:g:h:i:j:k:l:" o; do
        l)
          export input=${OPTARG}
        ;;
+       m)
+         export cacheDir=${OPTARG}
+       ;;
+       n)
+         export timeout=${OPTARG}
+       ;;
   esac
 done
 
@@ -75,7 +81,16 @@ if [ $output ];then
   ARGS="$ARGS --output $output"
 fi
 if [ $skipDirs ];then
-  ARGS="$ARGS --skip-dirs $skipDirs"
+  for i in $(echo $skipDirs | tr "," "\n")
+  do
+    ARGS="$ARGS --skip-dirs $i"
+  done
+fi
+if [ $cacheDir ];then
+  ARGS="$ARGS --cache-dir $cacheDir"
+fi
+if [ $timeout ];then
+  ARGS="$ARGS --timeout $timeout"
 fi
 
 echo "Running trivy with options: " --no-progress "${ARGS}" "${artifactRef}"