github: Use IAM Roles to push files on AWS S3

For security reasons long lived credentials are not considered secure.
To overcome this issue we can configure Github Workflows to use AWS OpenID Connect instead:
For further details: https://docs.github.com/en/actions/deployment/security-hardening-your-deployments/about-security-hardening-with-openid-connect

Author: alessio-perugini

.github/workflows/publish-go-nightly-task.yml

@@ -8,6 +8,7 @@ env:
   DIST_DIR: dist
   # The project's folder on Arduino's download server for uploading builds
   AWS_PLUGIN_TARGET: /arduino-lint/
+  AWS_REGION: "us-east-1"
   ARTIFACT_PREFIX: dist-
 
 # See: https://docs.github.com/actions/writing-workflows/choosing-when-your-workflow-runs/events-that-trigger-workflows
@@ -183,8 +184,10 @@ jobs:
 
   publish-nightly:
     runs-on: ubuntu-latest
+    environment: production
     needs: notarize-macos
-    permissions: {}
+    permissions:
+      id-token: write # This is required for requesting the JWT
 
     steps:
       - name: Download artifact
@@ -200,15 +203,15 @@ jobs:
           TAG="nightly-$(date -u +"%Y%m%d")"
           sha256sum ${{ env.PROJECT_NAME }}_${TAG}* > ${TAG}-checksums.txt
 
+      - name: configure aws credentials
+        uses: aws-actions/configure-aws-credentials@v4
+        with:
+          role-to-assume: ${{ secrets.AWS_ROLE_TO_ASSUME }}
+          role-session-name: "github_${{ env.PROJECT_NAME }}"
+          aws-region: ${{ env.AWS_REGION }}
+
       - name: Upload release files on Arduino downloads servers
-        uses: docker://plugins/s3
-        env:
-          PLUGIN_SOURCE: "${{ env.DIST_DIR }}/*"
-          PLUGIN_TARGET: "${{ env.AWS_PLUGIN_TARGET }}nightly"
-          PLUGIN_STRIP_PREFIX: "${{ env.DIST_DIR }}/"
-          PLUGIN_BUCKET: ${{ secrets.DOWNLOADS_BUCKET }}
-          AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
-          AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+        run: aws s3 sync ${{ env.DIST_DIR }} s3://${{ secrets.DOWNLOADS_BUCKET }}${{ env.AWS_PLUGIN_TARGET }}nightly
 
   report:
     runs-on: ubuntu-latest

.github/workflows/release-go-task.yml

@@ -8,6 +8,7 @@ env:
   DIST_DIR: dist
   # The project's folder on Arduino's download server for uploading builds
   AWS_PLUGIN_TARGET: /arduino-lint/
+  AWS_REGION: "us-east-1"
   ARTIFACT_PREFIX: dist-
 
 on:
@@ -189,9 +190,11 @@ jobs:
 
   create-release:
     runs-on: ubuntu-latest
+    environment: production
     needs: notarize-macos
     permissions:
       contents: write
+      id-token: write # This is required for requesting the JWT
 
     steps:
       - name: Download artifact
@@ -235,12 +238,12 @@ jobs:
           # (all the files we need are in the DIST_DIR root)
           artifacts: ${{ env.DIST_DIR }}/*
 
+      - name: configure aws credentials
+        uses: aws-actions/configure-aws-credentials@v4
+        with:
+          role-to-assume: ${{ secrets.AWS_ROLE_TO_ASSUME }}
+          role-session-name: "github_${{ env.PROJECT_NAME }}"
+          aws-region: ${{ env.AWS_REGION }}
+
       - name: Upload release files on Arduino downloads servers
-        uses: docker://plugins/s3
-        env:
-          PLUGIN_SOURCE: "${{ env.DIST_DIR }}/*"
-          PLUGIN_TARGET: ${{ env.AWS_PLUGIN_TARGET }}
-          PLUGIN_STRIP_PREFIX: "${{ env.DIST_DIR }}/"
-          PLUGIN_BUCKET: ${{ secrets.DOWNLOADS_BUCKET }}
-          AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
-          AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+        run: aws s3 sync ${{ env.DIST_DIR }} s3://${{ secrets.DOWNLOADS_BUCKET }}${{ env.AWS_PLUGIN_TARGET }}