Workflow for PR run checks to manage secret usage (#71)

* Workflow for PR run checks to manage secret usage

* Use full permission check

* Make check-run only for workflow calls and scan on targets

* Check target

* Preliminary needs

* Keep target removed

* Temporarily open up

* Revert "Temporarily open up"

This reverts commit 24c4e28.

* Always run check

* Allow PRs again, and check only on targets

* Incremental for both PR events

* Do not skip

* Removal for final testing post-merge

Author: withinfocus

.github/workflows/check-run.yml

@@ -0,0 +1,29 @@
+name: Check PR run
+
+on:
+  workflow_call:
+
+permissions: read-all
+
+jobs:
+  check:
+    name: Check
+    runs-on: ubuntu-22.04
+
+    steps:
+      - name: Get user permission
+        id: get-permission
+        uses: actions-cool/check-user-permission@956b2e73cdfe3bcb819bb7225e490cb3b18fd76e # v2.2.1
+        with:
+          require: write
+          username: ${{ github.triggering_actor }}
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Check user permission
+        if: steps.get-permission.outputs.require-result == 'false'
+        run: |
+          echo "User ${{ github.triggering_actor }} does not have the necessary access for this repository."
+          echo "Current permission level is ${{ steps.get-permission.outputs.user-permission }}."
+          echo "Job originally triggered by ${{ github.actor }}."
+          exit 1

.github/workflows/scan.yml

@@ -7,25 +7,33 @@ on:
       - "main"
       - "rc"
       - "hotfix-rc"
-  pull_request:
+  pull_request_target:
+    types: [opened, synchronize]
 
 permissions: read-all
 
 jobs:
+  check-run:
+    name: Check PR run
+    uses: ./.github/workflows/check-run.yml
+
   sast:
     name: SAST scan
     runs-on: ubuntu-22.04
+    needs: check-run
     permissions:
       security-events: write
 
     steps:
       - name: Check out repo
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+        with:
+          ref: ${{  github.event.pull_request.head.sha }}
 
       - name: Scan with Checkmarx
         uses: checkmarx/ast-github-action@749fec53e0db0f6404a97e2e0807c3e80e3583a7 #2.0.23
         env:
-          INCREMENTAL: "${{ github.event_name == 'pull_request' && '--sast-incremental' || '' }}"
+          INCREMENTAL: "${{ contains(github.event_name, 'pull_request') && '--sast-incremental' || '' }}"
         with:
           project_name: ${{ github.repository }}
           cx_tenant: ${{ secrets.CHECKMARX_TENANT }}
@@ -42,12 +50,14 @@ jobs:
   quality:
     name: Quality scan
     runs-on: ubuntu-22.04
+    needs: check-run
 
     steps:
       - name: Check out repo
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
         with:
           fetch-depth: 0
+          ref: ${{  github.event.pull_request.head.sha }}
 
       - name: Scan with SonarCloud
         uses: sonarsource/sonarcloud-github-action@49e6cd3b187936a73b8280d59ffd9da69df63ec9 # v2.1.1