feat: Add verify-signature plumbing and Temurin+Microsoft verification support (#1060 )

* Add verify-signature plumbing and Temurin verification support * Rebuild dist after signature verification changes * Refine signature verification errors and regenerate dist * refactor: make gpg.ts generic, move Adoptium-specific constant to temurin distribution * fix: mock renameWinArchive in temurin tests and add signature e2e job * refactor: bundle Adoptium public key, replace keyserver lookup with local import * feat: add verify-signature-public-key input to allow custom GPG key override * refactor: extract Adoptium public key to adoptium-key.ts; tighten gpg.ts cleanup scope * Add verify-signature plumbing and Temurin verification support * Potential fix for pull request finding Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com> * Potential fix for pull request finding Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com> * Add Microsoft signature verification support * Regenerate dist bundles for Microsoft signature checks * Harden Microsoft signature URL handling * Add setup-java-microsoft-signature-verification e2e job * chore: regenerate dist files * Fix e2e-versions: remove duplicate job, update signature jobs to checkout@v7 with env vars * Fix Prettier formatting in test files * fix: mock renameWinArchive in microsoft-installer tests to fix Windows CI failure * fix: use --homedir flag instead of GNUPGHOME env var for Windows GPG compatibility The Git-bundled GPG on Windows (MSYS2-based) does not automatically convert Windows-style paths in environment variables like GNUPGHOME. This caused GPG to fail with exit code 2 when verifying Microsoft JDK signatures on Windows, because the GNUPGHOME path (D:\a\_temp\...) was not recognized as a valid POSIX path. Fix: pass --homedir as an explicit command-line argument to both gpg --import and gpg --verify. MSYS2 does correctly convert Windows paths in command-line arguments, so this approach works reliably on Windows, Linux, and macOS. * fix: convert Windows paths to POSIX format for MSYS2 GPG on Windows The Git-bundled GPG on Windows (C:\Program Files\Git\usr\bin\gpg.exe) is an MSYS2-based binary that uses POSIX path conventions internally. When Windows-style paths with backslashes and drive letters (D:\a\_temp\...) are passed as arguments, GPG may fail to resolve them correctly, resulting in a fatal error (exit code 2). Fix: add a toGpgPath() helper that converts Windows paths to MSYS2 POSIX format (/d/a/_temp/...) before passing them to any gpg command. On Linux and macOS the helper is a no-op. Applied to all four paths used in verifyPackageSignature: - gpgHome (--homedir argument) - publicKeyFile (--import argument) - signaturePath (--verify signature argument) - archivePath (--verify data argument) * Fix gpg test formatting --------- Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com> Co-authored-by: Bruno Borges <brborges@microsoft.com>
Bump @typescript-eslint/parser from 8.61.1 to 8.62.0 (#1062 )
2026-06-30 16:28:00 +00:00 · 2026-06-29 13:19:49 +01:00 · 2026-06-29 09:13:56 +01:00 · 2026-06-29 09:13:25 +01:00 · 2026-06-29 09:12:58 +01:00 · 2026-06-29 09:12:17 +01:00
42 changed files with 2611 additions and 225 deletions
@@ -5,5 +5,6 @@ Describe your changes.
 Add link to the related issue.

 **Check list:**
+- [ ] Ran `npm run check` locally (format, lint, build, test) and all checks pass.
 - [ ] Mark if documentation changes are required.
 - [ ] Mark if tests were added or updated to cover the changes.
@@ -11,6 +11,9 @@ on:
    paths-ignore:
      - '**.md'

+permissions:
+  contents: read
+
 jobs:
  call-basic-validation:
    name: Basic validation
@@ -11,6 +11,9 @@ on:
      - '**.md'
  workflow_dispatch:

+permissions:
+  contents: read
+
 jobs:
  call-check-dist:
    name: Check dist/
@@ -8,6 +8,8 @@ on:
  schedule:
    - cron: '0 3 * * 0'

+permissions: {}
+
 jobs:
  call-codeQL-analysis:
    permissions:
@@ -11,6 +11,9 @@ on:
    paths-ignore:
      - '**.md'

+permissions:
+  contents: read
+
 defaults:
  run:
    shell: bash
@@ -25,6 +28,8 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
      - name: Run setup-java with the cache for gradle
        uses: ./
        id: setup-java
@@ -52,6 +57,8 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
      - name: Run setup-java with the cache for gradle
        uses: ./
        id: setup-java
@@ -77,6 +84,8 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
      - name: Run setup-java with the cache for gradle
        uses: ./
        id: setup-java
@@ -11,6 +11,9 @@ on:
    paths-ignore:
      - '**.md'

+permissions:
+  contents: read
+
 defaults:
  run:
    shell: bash
@@ -25,6 +28,8 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
      - name: Run setup-java with the cache for gradle
        uses: ./
        id: setup-java
@@ -51,6 +56,8 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
      - name: Run setup-java with the cache for gradle
        uses: ./
        id: setup-java
@@ -74,6 +81,8 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
      - name: Run setup-java with the cache for maven
        uses: ./
        id: setup-java
@@ -98,6 +107,8 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
      - name: Run setup-java with the cache for maven
        uses: ./
        id: setup-java
@@ -125,6 +136,8 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
      - name: Run setup-java with the cache for sbt
        uses: ./
        id: setup-java
@@ -175,6 +188,8 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
      - name: Run setup-java with the cache for sbt
        uses: ./
        id: setup-java
@@ -11,6 +11,9 @@ on:
    paths-ignore:
      - '**.md'

+permissions:
+  contents: read
+
 jobs:
  setup-java-local-file-adopt:
    name: Validate installation from local file Adopt
@@ -22,6 +25,8 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
      - name: Download Adopt OpenJDK file
        run: |
          if ($IsLinux) {
@@ -46,7 +51,9 @@ jobs:
          java-version: '11.0.0-ea'
          architecture: x64
      - name: Verify Java version
-        run: bash __tests__/verify-java.sh "11.0.10" "${{ steps.setup-java.outputs.path }}"
+        env:
+          JAVA_PATH: ${{ steps.setup-java.outputs.path }}
+        run: bash __tests__/verify-java.sh "11.0.10" "$JAVA_PATH"
        shell: bash

  setup-java-local-file-zulu:
@@ -59,6 +66,8 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
      - name: Download Zulu OpenJDK file
        run: |
          if ($IsLinux) {
@@ -83,7 +92,9 @@ jobs:
          java-version: '11.0.0-ea'
          architecture: x64
      - name: Verify Java version
-        run: bash __tests__/verify-java.sh "11.0" "${{ steps.setup-java.outputs.path }}"
+        env:
+          JAVA_PATH: ${{ steps.setup-java.outputs.path }}
+        run: bash __tests__/verify-java.sh "11.0" "$JAVA_PATH"
        shell: bash

  setup-java-local-file-temurin:
@@ -96,6 +107,8 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
      - name: Download Eclipse Temurin file
        run: |
          if ($IsLinux) {
@@ -120,5 +133,7 @@ jobs:
          java-version: '11.0.0-ea'
          architecture: x64
      - name: Verify Java version
-        run: bash __tests__/verify-java.sh "11.0.12" "${{ steps.setup-java.outputs.path }}"
+        env:
+          JAVA_PATH: ${{ steps.setup-java.outputs.path }}
+        run: bash __tests__/verify-java.sh "11.0.12" "$JAVA_PATH"
        shell: bash
@@ -11,6 +11,9 @@ on:
    paths-ignore:
      - '**.md'

+permissions:
+  contents: read
+
 defaults:
  run:
    shell: pwsh
@@ -26,6 +29,8 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
      - name: setup-java
        uses: ./
        id: setup-java
@@ -61,6 +66,8 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
      - name: Create fake settings.xml
        run: |
          $xmlDirectory = Join-Path $HOME ".m2"
@@ -97,6 +104,8 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
      - name: Create fake settings.xml
        run: |
          $xmlDirectory = Join-Path $HOME ".m2"
@@ -134,6 +143,8 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
      - name: setup-java
        uses: ./
        id: setup-java
@@ -13,6 +13,10 @@ on:
  schedule:
    - cron: '0 */12 * * *'
  workflow_dispatch:
+
+permissions:
+  contents: read
+
 jobs:
  setup-java-major-versions:
    name: ${{ matrix.distribution }} ${{ matrix.version }} (jdk-x64) - ${{ matrix.os }}
@@ -74,6 +78,8 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
      - name: setup-java
        uses: ./
        id: setup-java
@@ -83,14 +89,17 @@ jobs:
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      - name: Verify Java
-        run: bash __tests__/verify-java.sh "${{ matrix.version }}" "${{ steps.setup-java.outputs.path }}"
+        env:
+          JAVA_VERSION: ${{ matrix.version }}
+          JAVA_PATH: ${{ steps.setup-java.outputs.path }}
+        run: bash __tests__/verify-java.sh "$JAVA_VERSION" "$JAVA_PATH"
        shell: bash

  setup-java-alpine-linux:
    name: ${{ matrix.distribution }} ${{ matrix.version }} (jdk-x64) - alpine-linux - ${{ matrix.os }}
    runs-on: ${{ matrix.os }}
    container:
-      image: alpine:latest
+      image: alpine:3.21
    strategy:
      fail-fast: false
      matrix:
@@ -100,6 +109,8 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
      - name: Install bash
        run: apk add --no-cache bash
      - name: setup-java
@@ -109,7 +120,10 @@ jobs:
          java-version: ${{ matrix.version }}
          distribution: ${{ matrix.distribution }}
      - name: Verify Java
-        run: bash __tests__/verify-java.sh "${{ matrix.version }}" "${{ steps.setup-java.outputs.path }}"
+        env:
+          JAVA_VERSION: ${{ matrix.version }}
+          JAVA_PATH: ${{ steps.setup-java.outputs.path }}
+        run: bash __tests__/verify-java.sh "$JAVA_VERSION" "$JAVA_PATH"
        shell: bash

  setup-java-major-minor-versions:
@@ -150,6 +164,8 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
      - name: setup-java
        uses: ./
        id: setup-java
@@ -157,10 +173,12 @@ jobs:
          java-version: ${{ matrix.version }}
          distribution: ${{ matrix.distribution }}
      - name: Verify Java
-        run: bash __tests__/verify-java.sh "${{ matrix.version }}" "${{ steps.setup-java.outputs.path }}"
-        shell: bash
        env:
+          JAVA_VERSION: ${{ matrix.version }}
+          JAVA_PATH: ${{ steps.setup-java.outputs.path }}
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: bash __tests__/verify-java.sh "$JAVA_VERSION" "$JAVA_PATH"
+        shell: bash

  setup-java-check-latest:
    name: ${{ matrix.distribution }} ${{ matrix.version }} - check-latest flag - ${{ matrix.os }}
@@ -185,6 +203,8 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
      - name: setup-java
        uses: ./
        id: setup-java
@@ -195,7 +215,9 @@ jobs:
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      - name: Verify Java
-        run: bash __tests__/verify-java.sh "11" "${{ steps.setup-java.outputs.path }}"
+        env:
+          JAVA_PATH: ${{ steps.setup-java.outputs.path }}
+        run: bash __tests__/verify-java.sh "11" "$JAVA_PATH"
        shell: bash

  setup-java-multiple-jdks:
@@ -221,6 +243,8 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
      - name: setup-java
        uses: ./
        id: setup-java
@@ -245,7 +269,9 @@ jobs:
          }
        shell: pwsh
      - name: Verify Java
-        run: bash __tests__/verify-java.sh "17" "${{ steps.setup-java.outputs.path }}"
+        env:
+          JAVA_PATH: ${{ steps.setup-java.outputs.path }}
+        run: bash __tests__/verify-java.sh "17" "$JAVA_PATH"
        shell: bash

  setup-java-ea-versions-zulu:
@@ -260,6 +286,8 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
      - name: setup-java
        uses: ./
        id: setup-java
@@ -267,7 +295,10 @@ jobs:
          java-version: ${{ matrix.version }}
          distribution: zulu
      - name: Verify Java
-        run: bash __tests__/verify-java.sh "${{ matrix.version }}" "${{ steps.setup-java.outputs.path }}"
+        env:
+          JAVA_VERSION: ${{ matrix.version }}
+          JAVA_PATH: ${{ steps.setup-java.outputs.path }}
+        run: bash __tests__/verify-java.sh "$JAVA_VERSION" "$JAVA_PATH"
        shell: bash

  setup-java-ea-versions-temurin:
@@ -282,6 +313,8 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
      - name: setup-java
        uses: ./
        id: setup-java
@@ -289,7 +322,66 @@ jobs:
          java-version: ${{ matrix.version }}
          distribution: temurin
      - name: Verify Java
-        run: bash __tests__/verify-java.sh "${{ matrix.version }}" "${{ steps.setup-java.outputs.path }}"
+        env:
+          JAVA_VERSION: ${{ matrix.version }}
+          JAVA_PATH: ${{ steps.setup-java.outputs.path }}
+        run: bash __tests__/verify-java.sh "$JAVA_VERSION" "$JAVA_PATH"
+        shell: bash
+
+  setup-java-temurin-signature-verification:
+    name: temurin ${{ matrix.version }} signature verification - ${{ matrix.os }}
+    needs: setup-java-major-minor-versions
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [macos-latest, windows-latest, ubuntu-latest]
+        version: ['21', '17']
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
+      - name: setup-java with signature verification
+        uses: ./
+        id: setup-java
+        with:
+          java-version: ${{ matrix.version }}
+          distribution: temurin
+          verify-signature: true
+      - name: Verify Java
+        env:
+          JAVA_VERSION: ${{ matrix.version }}
+          JAVA_PATH: ${{ steps.setup-java.outputs.path }}
+        run: bash __tests__/verify-java.sh "$JAVA_VERSION" "$JAVA_PATH"
+        shell: bash
+
+  setup-java-microsoft-signature-verification:
+    name: microsoft ${{ matrix.version }} signature verification - ${{ matrix.os }}
+    needs: setup-java-major-minor-versions
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [macos-latest, windows-latest, ubuntu-latest]
+        version: ['21', '17']
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
+      - name: setup-java with signature verification
+        uses: ./
+        id: setup-java
+        with:
+          java-version: ${{ matrix.version }}
+          distribution: microsoft
+          verify-signature: true
+      - name: Verify Java
+        env:
+          JAVA_VERSION: ${{ matrix.version }}
+          JAVA_PATH: ${{ steps.setup-java.outputs.path }}
+        run: bash __tests__/verify-java.sh "$JAVA_VERSION" "$JAVA_PATH"
        shell: bash

  setup-java-ea-versions-sapmachine:
@@ -304,6 +396,8 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
      - name: setup-java
        uses: ./
        id: setup-java
@@ -311,7 +405,10 @@ jobs:
          java-version: ${{ matrix.version }}
          distribution: sapmachine
      - name: Verify Java
-        run: bash __tests__/verify-java.sh "${{ matrix.version }}" "${{ steps.setup-java.outputs.path }}"
+        env:
+          JAVA_VERSION: ${{ matrix.version }}
+          JAVA_PATH: ${{ steps.setup-java.outputs.path }}
+        run: bash __tests__/verify-java.sh "$JAVA_VERSION" "$JAVA_PATH"
        shell: bash

  setup-java-custom-package-type:
@@ -391,6 +488,8 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
      - name: setup-java
        uses: ./
        id: setup-java
@@ -401,7 +500,10 @@ jobs:
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      - name: Verify Java
-        run: bash __tests__/verify-java.sh "${{ matrix.version }}" "${{ steps.setup-java.outputs.path }}"
+        env:
+          JAVA_VERSION: ${{ matrix.version }}
+          JAVA_PATH: ${{ steps.setup-java.outputs.path }}
+        run: bash __tests__/verify-java.sh "$JAVA_VERSION" "$JAVA_PATH"
        shell: bash

  # Only Liberica and Zulu provide x86
@@ -419,6 +521,8 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
      - name: setup-java
        uses: ./
        id: setup-java
@@ -427,7 +531,10 @@ jobs:
          java-version: ${{ matrix.version }}
          architecture: 'x86'
      - name: Verify Java
-        run: bash __tests__/verify-java.sh "${{ matrix.version }}" "${{ steps.setup-java.outputs.path }}"
+        env:
+          JAVA_VERSION: ${{ matrix.version }}
+          JAVA_PATH: ${{ steps.setup-java.outputs.path }}
+        run: bash __tests__/verify-java.sh "$JAVA_VERSION" "$JAVA_PATH"
        shell: bash

  setup-java-version-both-version-inputs-presents:
@@ -442,6 +549,8 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
      - name: Create .java-version file
        shell: bash
        run: echo "17" > .java-version
@@ -456,7 +565,9 @@ jobs:
          java-version: 11
          java-version-file: ${{matrix.java-version-file }}
      - name: Verify Java
-        run: bash __tests__/verify-java.sh "11" "${{ steps.setup-java.outputs.path }}"
+        env:
+          JAVA_PATH: ${{ steps.setup-java.outputs.path }}
+        run: bash __tests__/verify-java.sh "11" "$JAVA_PATH"
        shell: bash

  setup-java-version-from-file-major-notation:
@@ -471,6 +582,8 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
      - name: Create .java-version file
        shell: bash
        run: echo "11" > .java-version
@@ -484,7 +597,9 @@ jobs:
          distribution: ${{ matrix.distribution }}
          java-version-file: ${{matrix.java-version-file }}
      - name: Verify Java
-        run: bash __tests__/verify-java.sh "11" "${{ steps.setup-java.outputs.path }}"
+        env:
+          JAVA_PATH: ${{ steps.setup-java.outputs.path }}
+        run: bash __tests__/verify-java.sh "11" "$JAVA_PATH"
        shell: bash

  setup-java-version-from-file-major-minor-patch-notation:
@@ -499,6 +614,8 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
      - name: Create .java-version file
        shell: bash
        run: echo "17.0.10" > .java-version
@@ -512,7 +629,9 @@ jobs:
          distribution: ${{ matrix.distribution }}
          java-version-file: ${{matrix.java-version-file }}
      - name: Verify Java
-        run: bash __tests__/verify-java.sh "17.0.10" "${{ steps.setup-java.outputs.path }}"
+        env:
+          JAVA_PATH: ${{ steps.setup-java.outputs.path }}
+        run: bash __tests__/verify-java.sh "17.0.10" "$JAVA_PATH"
        shell: bash

  setup-java-version-from-file-major-minor-patch-with-dist:
@@ -527,6 +646,8 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
      - name: Create .java-version file
        shell: bash
        run: echo "openjdk64-17.0.10" > .java-version
@@ -543,5 +664,7 @@ jobs:
          distribution: ${{ matrix.distribution }}
          java-version-file: ${{matrix.java-version-file }}
      - name: Verify Java
-        run: bash __tests__/verify-java.sh "17.0.10" "${{ steps.setup-java.outputs.path }}"
+        env:
+          JAVA_PATH: ${{ steps.setup-java.outputs.path }}
+        run: bash __tests__/verify-java.sh "17.0.10" "$JAVA_PATH"
        shell: bash
@@ -9,6 +9,9 @@ on:
      - main
  workflow_dispatch:

+permissions:
+  contents: read
+
 jobs:
  call-licensed:
    name: Licensed
@@ -5,6 +5,8 @@ on:
    types: [released]
  workflow_dispatch:

+permissions: {}
+
 jobs:
  publish:
    runs-on: ubuntu-latest
@@ -16,6 +18,8 @@ jobs:
    steps:
      - name: Checking out
        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
      - name: Publish
        id: publish
        uses: actions/publish-immutable-action@v0.0.4
@@ -5,7 +5,12 @@ on:
    - cron: '0 3 * * 0'
  workflow_dispatch:

+permissions: {}
+
 jobs:
  call-update-configuration-files:
    name: Update configuration files
+    permissions:
+      contents: write # to push the branch with updated configuration files
+      pull-requests: write # to open/update the configuration update PR
    uses: actions/reusable-workflows/.github/workflows/update-config-files.yml@main
@@ -0,0 +1,48 @@
+name: Security analysis with zizmor
+
+on:
+  push:
+    branches:
+      - main
+      - releases/*
+    paths-ignore:
+      - '**.md'
+  pull_request:
+    paths-ignore:
+      - '**.md'
+  workflow_dispatch:
+
+permissions: {}
+
+jobs:
+  zizmor:
+    name: Analyze workflows with zizmor
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      security-events: write # to upload SARIF results to code scanning
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
+
+      - name: Set up Python
+        uses: actions/setup-python@v6
+        with:
+          python-version: '3.x'
+
+      - name: Install zizmor
+        run: pip install zizmor
+
+      - name: Run zizmor
+        run: zizmor --format sarif .github/workflows/ > zizmor.sarif
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Upload SARIF results to code scanning
+        if: always() && (github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository)
+        uses: github/codeql-action/upload-sarif@v4
+        with:
+          sarif_file: zizmor.sarif
+          category: zizmor
@@ -0,0 +1,11 @@
+# Configuration for zizmor (https://docs.zizmor.sh)
+rules:
+  unpinned-uses:
+    config:
+      # First-party GitHub-maintained actions are trusted and referenced by
+      # major-version tags (the convention used across the actions org).
+      # Any third-party action must be pinned to a full commit SHA.
+      policies:
+        actions/*: ref-pin
+        github/*: ref-pin
+        '*': hash-pin
@@ -0,0 +1,4 @@
+#!/usr/bin/env sh
+. "$(dirname -- "$0")/_/husky.sh"
+
+npx lint-staged
@@ -0,0 +1,4 @@
+#!/usr/bin/env sh
+. "$(dirname -- "$0")/_/husky.sh"
+
+npm run build && npm test
@@ -41,6 +41,10 @@ For more details,  see the full release notes on the [releases page](https://git

  - `check-latest`: Setting this option makes the action to check for the latest available version for the version spec.

+  - `verify-signature`: Verifies downloaded Java package signatures when supported by the selected distribution. Currently supported for `temurin` and `microsoft`. If set to `true` for unsupported distributions, the action fails.
+
+  - `verify-signature-public-key`: ASCII-armored GPG public key used to verify the downloaded package signature. Overrides the default bundled key for the selected distribution.
+
  - `cache`: Quick [setup caching](#caching-packages-dependencies) for the dependencies managed through one of the predefined package managers. It can be one of "maven", "gradle" or "sbt".

  - `cache-dependency-path`: The path to a dependency file: pom.xml, build.gradle, build.sbt, etc. This option can be used with the `cache` option. If this option is omitted, the action searches for the dependency file in the entire repository. This option supports wildcards and a list of file names for caching multiple dependencies.
@@ -112,6 +116,7 @@ Currently, the following distributions are supported:
 | `dragonwell` | [Alibaba Dragonwell JDK](https://dragonwell-jdk.io/) | [`dragonwell` license](https://www.aliyun.com/product/dragonwell/)
 | `sapmachine` | [SAP SapMachine JDK/JRE](https://sapmachine.io/) | [`sapmachine` license](https://github.com/SAP/SapMachine/blob/sapmachine/LICENSE)
 | `graalvm` | [Oracle GraalVM](https://www.graalvm.org/) | [`graalvm` license](https://www.oracle.com/downloads/licenses/graal-free-license.html)
+| `graalvm-community` | [GraalVM Community](https://github.com/graalvm/graalvm-ce-builds/releases) | [`graalvm-community` license](https://github.com/oracle/graal/blob/master/LICENSE)
 | `jetbrains` | [JetBrains Runtime](https://github.com/JetBrains/JetBrainsRuntime/) | [`jetbrains` license](https://github.com/JetBrains/JetBrainsRuntime/blob/main/LICENSE)
 | `jdkfile` | Custom JDK Installation | |

@@ -120,6 +125,7 @@ Currently, the following distributions are supported:
 > - AdoptOpenJDK got moved to Eclipse Temurin and won't be updated anymore. It is highly recommended to migrate workflows from `adopt` and `adopt-openj9`, to `temurin` and `semeru` respectively, to keep receiving software and security updates. See more details in the [Good-bye AdoptOpenJDK post](https://blog.adoptopenjdk.net/2021/08/goodbye-adoptopenjdk-hello-adoptium/).
 > - For Azul Zulu OpenJDK architectures x64 and arm64 are mapped to x86 / arm with proper hw_bitness.
 > - To comply with the GraalVM Free Terms and Conditions (GFTC) license, it is recommended to use GraalVM JDK 17 version 17.0.12, as this is the only version of GraalVM JDK 17 available under the GFTC license. Additionally, it is encouraged to consider upgrading to GraalVM JDK 21, which offers the latest features and improvements.
+> - GraalVM Community is available as `distribution: 'graalvm-community'` for stable JDK 17 and later releases published on GitHub.

 **NOTE:** Oracle JDK 17 licensing varies by patch level. As shown on the [JDK 17 Archive](https://www.oracle.com/java/technologies/javase/jdk17-archive-downloads.html) (versions up to 17.0.12 are under the [NFTC](https://www.oracle.com/downloads/licenses/no-fee-license.html) license) and the [JDK 17.0.13+ Archive](https://www.oracle.com/java/technologies/javase/jdk17-0-13-later-archive-downloads.html) (versions 17.0.13 and later are under the [OTN](https://www.oracle.com/downloads/licenses/javase-license1.html) license). To stay on the free NFTC license, use `distribution: 'oracle'` with `java-version: '17.0.12'` (or earlier) instead of the floating `'17'`. Alternatively, upgrade to Oracle JDK 21+, which remains under the NFTC license.

@@ -15,7 +15,8 @@
          "link": "https://github.com/adoptium/temurin16-binaries/releases/download/jdk-16.0.2%2B7/OpenJDK16U-jdk_x64_linux_hotspot_16.0.2_7.tar.gz",
          "metadata_link": "https://github.com/adoptium/temurin16-binaries/releases/download/jdk-16.0.2%2B7/OpenJDK16U-jdk_x64_linux_hotspot_16.0.2_7.tar.gz.json",
          "name": "OpenJDK16U-jdk_x64_linux_hotspot_16.0.2_7.tar.gz",
-          "size": 205463525
+          "size": 205463525,
+          "signature_link": "https://github.com/adoptium/temurin16-binaries/releases/download/jdk-16.0.2%2B7/OpenJDK16U-jdk_x64_linux_hotspot_16.0.2_7.tar.gz.sig"
        },
        "project": "jdk",
        "scm_ref": "jdk-16.0.2+7_adopt",
@@ -44,7 +45,8 @@
          "link": "https://github.com/adoptium/temurin16-binaries/releases/download/jdk-16.0.2%2B7/OpenJDK16U-jdk_x64_mac_hotspot_16.0.2_7.tar.gz",
          "metadata_link": "https://github.com/adoptium/temurin16-binaries/releases/download/jdk-16.0.2%2B7/OpenJDK16U-jdk_x64_mac_hotspot_16.0.2_7.tar.gz.json",
          "name": "OpenJDK16U-jdk_x64_mac_hotspot_16.0.2_7.tar.gz",
-          "size": 206621395
+          "size": 206621395,
+          "signature_link": "https://github.com/adoptium/temurin16-binaries/releases/download/jdk-16.0.2%2B7/OpenJDK16U-jdk_x64_mac_hotspot_16.0.2_7.tar.gz.sig"
        },
        "project": "jdk",
        "scm_ref": "jdk-16.0.2+7_adopt",
@@ -73,7 +75,8 @@
          "link": "https://github.com/adoptium/temurin16-binaries/releases/download/jdk-16.0.2%2B7/OpenJDK16U-jdk_x64_windows_hotspot_16.0.2_7.zip",
          "metadata_link": "https://github.com/adoptium/temurin16-binaries/releases/download/jdk-16.0.2%2B7/OpenJDK16U-jdk_x64_windows_hotspot_16.0.2_7.zip.json",
          "name": "OpenJDK16U-jdk_x64_windows_hotspot_16.0.2_7.zip",
-          "size": 203448494
+          "size": 203448494,
+          "signature_link": "https://github.com/adoptium/temurin16-binaries/releases/download/jdk-16.0.2%2B7/OpenJDK16U-jdk_x64_windows_hotspot_16.0.2_7.zip.sig"
        },
        "project": "jdk",
        "scm_ref": "jdk-16.0.2+7_adopt",
@@ -113,7 +116,8 @@
          "link": "https://github.com/adoptium/temurin8-binaries/releases/download/jdk8u302-b08/OpenJDK8U-jdk_x64_linux_hotspot_8u302b08.tar.gz",
          "metadata_link": "https://github.com/adoptium/temurin8-binaries/releases/download/jdk8u302-b08/OpenJDK8U-jdk_x64_linux_hotspot_8u302b08.tar.gz.json",
          "name": "OpenJDK8U-jdk_x64_linux_hotspot_8u302b08.tar.gz",
-          "size": 102954777
+          "size": 102954777,
+          "signature_link": "https://github.com/adoptium/temurin8-binaries/releases/download/jdk8u302-b08/OpenJDK8U-jdk_x64_linux_hotspot_8u302b08.tar.gz.sig"
        },
        "project": "jdk",
        "scm_ref": "jdk8u302-b08",
@@ -142,7 +146,8 @@
          "link": "https://github.com/adoptium/temurin8-binaries/releases/download/jdk8u302-b08/OpenJDK8U-jdk_x64_mac_hotspot_8u302b08.tar.gz",
          "metadata_link": "https://github.com/adoptium/temurin8-binaries/releases/download/jdk8u302-b08/OpenJDK8U-jdk_x64_mac_hotspot_8u302b08.tar.gz.json",
          "name": "OpenJDK8U-jdk_x64_mac_hotspot_8u302b08.tar.gz",
-          "size": 107303398
+          "size": 107303398,
+          "signature_link": "https://github.com/adoptium/temurin8-binaries/releases/download/jdk8u302-b08/OpenJDK8U-jdk_x64_mac_hotspot_8u302b08.tar.gz.sig"
        },
        "project": "jdk",
        "scm_ref": "jdk8u302-b08",
@@ -171,7 +176,8 @@
          "link": "https://github.com/adoptium/temurin8-binaries/releases/download/jdk8u302-b08/OpenJDK8U-jdk_x64_windows_hotspot_8u302b08.zip",
          "metadata_link": "https://github.com/adoptium/temurin8-binaries/releases/download/jdk8u302-b08/OpenJDK8U-jdk_x64_windows_hotspot_8u302b08.zip.json",
          "name": "OpenJDK8U-jdk_x64_windows_hotspot_8u302b08.zip",
-          "size": 104297671
+          "size": 104297671,
+          "signature_link": "https://github.com/adoptium/temurin8-binaries/releases/download/jdk8u302-b08/OpenJDK8U-jdk_x64_windows_hotspot_8u302b08.zip.sig"
        },
        "project": "jdk",
        "scm_ref": "jdk8u302-b08",
@@ -211,7 +217,8 @@
          "link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_aarch64_linux_hotspot_2021-07-31-00-07.tar.gz",
          "metadata_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_aarch64_linux_hotspot_2021-07-31-00-07.tar.gz.json",
          "name": "OpenJDK17-jdk_aarch64_linux_hotspot_2021-07-31-00-07.tar.gz",
-          "size": 188909250
+          "size": 188909250,
+          "signature_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_aarch64_linux_hotspot_2021-07-31-00-07.tar.gz.sig"
        },
        "project": "jdk",
        "scm_ref": "jdk-17+33_adopt-16-ge39bf269d60",
@@ -240,7 +247,8 @@
          "link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_aarch64_mac_hotspot_2021-07-31-00-07.tar.gz",
          "metadata_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_aarch64_mac_hotspot_2021-07-31-00-07.tar.gz.json",
          "name": "OpenJDK17-jdk_aarch64_mac_hotspot_2021-07-31-00-07.tar.gz",
-          "size": 192952713
+          "size": 192952713,
+          "signature_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_aarch64_mac_hotspot_2021-07-31-00-07.tar.gz.sig"
        },
        "project": "jdk",
        "scm_ref": "jdk-17+33_adopt-219-ge39bf269d60",
@@ -260,7 +268,8 @@
          "link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_arm_linux_hotspot_2021-07-31-00-07.tar.gz",
          "metadata_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_arm_linux_hotspot_2021-07-31-00-07.tar.gz.json",
          "name": "OpenJDK17-jdk_arm_linux_hotspot_2021-07-31-00-07.tar.gz",
-          "size": 188816971
+          "size": 188816971,
+          "signature_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_arm_linux_hotspot_2021-07-31-00-07.tar.gz.sig"
        },
        "project": "jdk",
        "scm_ref": "jdk-17+33_adopt-16-ge39bf269d60",
@@ -280,7 +289,8 @@
          "link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_ppc64_aix_hotspot_2021-07-31-00-07.tar.gz",
          "metadata_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_ppc64_aix_hotspot_2021-07-31-00-07.tar.gz.json",
          "name": "OpenJDK17-jdk_ppc64_aix_hotspot_2021-07-31-00-07.tar.gz",
-          "size": 182299353
+          "size": 182299353,
+          "signature_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_ppc64_aix_hotspot_2021-07-31-00-07.tar.gz.sig"
        },
        "project": "jdk",
        "scm_ref": "jdk-17+33_adopt-219-ge39bf269d60",
@@ -300,7 +310,8 @@
          "link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_ppc64le_linux_hotspot_2021-07-31-00-07.tar.gz",
          "metadata_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_ppc64le_linux_hotspot_2021-07-31-00-07.tar.gz.json",
          "name": "OpenJDK17-jdk_ppc64le_linux_hotspot_2021-07-31-00-07.tar.gz",
-          "size": 187674392
+          "size": 187674392,
+          "signature_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_ppc64le_linux_hotspot_2021-07-31-00-07.tar.gz.sig"
        },
        "project": "jdk",
        "scm_ref": "jdk-17+33_adopt-46-gea8d2c72e83",
@@ -320,7 +331,8 @@
          "link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_s390x_linux_hotspot_2021-07-31-00-07.tar.gz",
          "metadata_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_s390x_linux_hotspot_2021-07-31-00-07.tar.gz.json",
          "name": "OpenJDK17-jdk_s390x_linux_hotspot_2021-07-31-00-07.tar.gz",
-          "size": 179501342
+          "size": 179501342,
+          "signature_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_s390x_linux_hotspot_2021-07-31-00-07.tar.gz.sig"
        },
        "project": "jdk",
        "scm_ref": "jdk-17+33_adopt-21-ge39bf269d60",
@@ -340,7 +352,8 @@
          "link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_x64_alpine-linux_hotspot_2021-07-29-23-34.tar.gz",
          "metadata_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_x64_alpine-linux_hotspot_2021-07-29-23-34.tar.gz.json",
          "name": "OpenJDK17-jdk_x64_alpine-linux_hotspot_2021-07-29-23-34.tar.gz",
-          "size": 192126971
+          "size": 192126971,
+          "signature_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_x64_alpine-linux_hotspot_2021-07-29-23-34.tar.gz.sig"
        },
        "project": "jdk",
        "scm_ref": "jdk-17+33_adopt-219-ge39bf269d60",
@@ -360,7 +373,8 @@
          "link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_x64_linux_hotspot_2021-07-31-00-07.tar.gz",
          "metadata_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_x64_linux_hotspot_2021-07-31-00-07.tar.gz.json",
          "name": "OpenJDK17-jdk_x64_linux_hotspot_2021-07-31-00-07.tar.gz",
-          "size": 192015878
+          "size": 192015878,
+          "signature_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_x64_linux_hotspot_2021-07-31-00-07.tar.gz.sig"
        },
        "project": "jdk",
        "scm_ref": "jdk-17+33_adopt-21-ge39bf269d60",
@@ -389,7 +403,8 @@
          "link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_x64_mac_hotspot_2021-07-31-00-07.tar.gz",
          "metadata_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_x64_mac_hotspot_2021-07-31-00-07.tar.gz.json",
          "name": "OpenJDK17-jdk_x64_mac_hotspot_2021-07-31-00-07.tar.gz",
-          "size": 192422068
+          "size": 192422068,
+          "signature_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_x64_mac_hotspot_2021-07-31-00-07.tar.gz.sig"
        },
        "project": "jdk",
        "scm_ref": "jdk-17+33_adopt-219-ge39bf269d60",
@@ -418,7 +433,8 @@
          "link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_x64_windows_hotspot_2021-07-31-00-07.zip",
          "metadata_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_x64_windows_hotspot_2021-07-31-00-07.zip.json",
          "name": "OpenJDK17-jdk_x64_windows_hotspot_2021-07-31-00-07.zip",
-          "size": 188694175
+          "size": 188694175,
+          "signature_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_x64_windows_hotspot_2021-07-31-00-07.zip.sig"
        },
        "project": "jdk",
        "scm_ref": "jdk-17+33_adopt-219-ge39bf269d60",
@@ -447,7 +463,8 @@
          "link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_x86-32_windows_hotspot_2021-07-31-00-07.zip",
          "metadata_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_x86-32_windows_hotspot_2021-07-31-00-07.zip.json",
          "name": "OpenJDK17-jdk_x86-32_windows_hotspot_2021-07-31-00-07.zip",
-          "size": 184618115
+          "size": 184618115,
+          "signature_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_x86-32_windows_hotspot_2021-07-31-00-07.zip.sig"
        },
        "project": "jdk",
        "scm_ref": "jdk-17+33_adopt-219-ge39bf269d60",
@@ -489,7 +506,8 @@
          "link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_x64_alpine-linux_hotspot_2021-07-27-23-34.tar.gz",
          "metadata_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_x64_alpine-linux_hotspot_2021-07-27-23-34.tar.gz.json",
          "name": "OpenJDK17-jdk_x64_alpine-linux_hotspot_2021-07-27-23-34.tar.gz",
-          "size": 192125161
+          "size": 192125161,
+          "signature_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-31-00-07-beta/OpenJDK17-jdk_x64_alpine-linux_hotspot_2021-07-27-23-34.tar.gz.sig"
        },
        "project": "jdk",
        "scm_ref": "jdk-17+32_adopt-242-gce1857dd7a1",
@@ -531,7 +549,8 @@
          "link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-23-03-09-beta/OpenJDK17-jdk_aarch64_linux_hotspot_2021-07-23-03-09.tar.gz",
          "metadata_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-23-03-09-beta/OpenJDK17-jdk_aarch64_linux_hotspot_2021-07-23-03-09.tar.gz.json",
          "name": "OpenJDK17-jdk_aarch64_linux_hotspot_2021-07-23-03-09.tar.gz",
-          "size": 188911467
+          "size": 188911467,
+          "signature_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-23-03-09-beta/OpenJDK17-jdk_aarch64_linux_hotspot_2021-07-23-03-09.tar.gz.sig"
        },
        "project": "jdk",
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          "link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-02-12-00-beta/OpenJDK17-jdk_x86-32_windows_hotspot_2021-07-02-12-00.zip",
          "metadata_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-02-12-00-beta/OpenJDK17-jdk_x86-32_windows_hotspot_2021-07-02-12-00.zip.json",
          "name": "OpenJDK17-jdk_x86-32_windows_hotspot_2021-07-02-12-00.zip",
-          "size": 184618232
+          "size": 184618232,
+          "signature_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-07-02-12-00-beta/OpenJDK17-jdk_x86-32_windows_hotspot_2021-07-02-12-00.zip.sig"
        },
        "project": "jdk",
        "scm_ref": "jdk-17+29_adopt-138-g6d3debb5c12",
@@ -2301,7 +2389,8 @@
          "link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_aarch64_linux_hotspot_2021-06-30-09-16.tar.gz",
          "metadata_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_aarch64_linux_hotspot_2021-06-30-09-16.tar.gz.json",
          "name": "OpenJDK17-jdk_aarch64_linux_hotspot_2021-06-30-09-16.tar.gz",
-          "size": 188940191
+          "size": 188940191,
+          "signature_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_aarch64_linux_hotspot_2021-06-30-09-16.tar.gz.sig"
        },
        "project": "jdk",
        "scm_ref": "jdk-17+28_adopt-130-g0fe0d0825e7",
@@ -2330,7 +2419,8 @@
          "link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_aarch64_mac_hotspot_2021-06-30-09-16.tar.gz",
          "metadata_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_aarch64_mac_hotspot_2021-06-30-09-16.tar.gz.json",
          "name": "OpenJDK17-jdk_aarch64_mac_hotspot_2021-06-30-09-16.tar.gz",
-          "size": 192953718
+          "size": 192953718,
+          "signature_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_aarch64_mac_hotspot_2021-06-30-09-16.tar.gz.sig"
        },
        "project": "jdk",
        "scm_ref": "jdk-17+28_adopt-130-g0fe0d0825e7",
@@ -2350,7 +2440,8 @@
          "link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_arm_linux_hotspot_2021-06-30-09-16.tar.gz",
          "metadata_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_arm_linux_hotspot_2021-06-30-09-16.tar.gz.json",
          "name": "OpenJDK17-jdk_arm_linux_hotspot_2021-06-30-09-16.tar.gz",
-          "size": 188795343
+          "size": 188795343,
+          "signature_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_arm_linux_hotspot_2021-06-30-09-16.tar.gz.sig"
        },
        "project": "jdk",
        "scm_ref": "0fe0d0825e7",
@@ -2370,7 +2461,8 @@
          "link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_ppc64_aix_hotspot_2021-06-30-09-16.tar.gz",
          "metadata_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_ppc64_aix_hotspot_2021-06-30-09-16.tar.gz.json",
          "name": "OpenJDK17-jdk_ppc64_aix_hotspot_2021-06-30-09-16.tar.gz",
-          "size": 182285782
+          "size": 182285782,
+          "signature_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_ppc64_aix_hotspot_2021-06-30-09-16.tar.gz.sig"
        },
        "project": "jdk",
        "scm_ref": "0fe0d0825e7",
@@ -2390,7 +2482,8 @@
          "link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_ppc64le_linux_hotspot_2021-06-30-09-16.tar.gz",
          "metadata_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_ppc64le_linux_hotspot_2021-06-30-09-16.tar.gz.json",
          "name": "OpenJDK17-jdk_ppc64le_linux_hotspot_2021-06-30-09-16.tar.gz",
-          "size": 187652430
+          "size": 187652430,
+          "signature_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_ppc64le_linux_hotspot_2021-06-30-09-16.tar.gz.sig"
        },
        "project": "jdk",
        "scm_ref": "0fe0d0825e7",
@@ -2410,7 +2503,8 @@
          "link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_s390x_linux_hotspot_2021-06-30-09-16.tar.gz",
          "metadata_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_s390x_linux_hotspot_2021-06-30-09-16.tar.gz.json",
          "name": "OpenJDK17-jdk_s390x_linux_hotspot_2021-06-30-09-16.tar.gz",
-          "size": 179489547
+          "size": 179489547,
+          "signature_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_s390x_linux_hotspot_2021-06-30-09-16.tar.gz.sig"
        },
        "project": "jdk",
        "scm_ref": "0fe0d0825e7",
@@ -2430,7 +2524,8 @@
          "link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_x64_alpine-linux_hotspot_2021-06-29-23-33.tar.gz",
          "metadata_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_x64_alpine-linux_hotspot_2021-06-29-23-33.tar.gz.json",
          "name": "OpenJDK17-jdk_x64_alpine-linux_hotspot_2021-06-29-23-33.tar.gz",
-          "size": 192109453
+          "size": 192109453,
+          "signature_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_x64_alpine-linux_hotspot_2021-06-29-23-33.tar.gz.sig"
        },
        "project": "jdk",
        "scm_ref": "jdk-17+28_adopt-130-g0fe0d0825e7",
@@ -2450,7 +2545,8 @@
          "link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_x64_linux_hotspot_2021-06-30-09-16.tar.gz",
          "metadata_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_x64_linux_hotspot_2021-06-30-09-16.tar.gz.json",
          "name": "OpenJDK17-jdk_x64_linux_hotspot_2021-06-30-09-16.tar.gz",
-          "size": 192013559
+          "size": 192013559,
+          "signature_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_x64_linux_hotspot_2021-06-30-09-16.tar.gz.sig"
        },
        "project": "jdk",
        "scm_ref": "jdk-17+28_adopt-130-g0fe0d0825e7",
@@ -2479,7 +2575,8 @@
          "link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_x64_mac_hotspot_2021-06-30-09-16.tar.gz",
          "metadata_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_x64_mac_hotspot_2021-06-30-09-16.tar.gz.json",
          "name": "OpenJDK17-jdk_x64_mac_hotspot_2021-06-30-09-16.tar.gz",
-          "size": 192419518
+          "size": 192419518,
+          "signature_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_x64_mac_hotspot_2021-06-30-09-16.tar.gz.sig"
        },
        "project": "jdk",
        "scm_ref": "jdk-17+28_adopt-130-g0fe0d0825e7",
@@ -2508,7 +2605,8 @@
          "link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_x64_windows_hotspot_2021-06-30-09-16.zip",
          "metadata_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_x64_windows_hotspot_2021-06-30-09-16.zip.json",
          "name": "OpenJDK17-jdk_x64_windows_hotspot_2021-06-30-09-16.zip",
-          "size": 188672489
+          "size": 188672489,
+          "signature_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_x64_windows_hotspot_2021-06-30-09-16.zip.sig"
        },
        "project": "jdk",
        "scm_ref": "jdk-17+28_adopt-130-g0fe0d0825e7",
@@ -2537,7 +2635,8 @@
          "link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_x86-32_windows_hotspot_2021-06-30-09-16.zip",
          "metadata_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_x86-32_windows_hotspot_2021-06-30-09-16.zip.json",
          "name": "OpenJDK17-jdk_x86-32_windows_hotspot_2021-06-30-09-16.zip",
-          "size": 184626094
+          "size": 184626094,
+          "signature_link": "https://github.com/adoptium/temurin17-binaries/releases/download/jdk17-2021-06-30-09-16-beta/OpenJDK17-jdk_x86-32_windows_hotspot_2021-06-30-09-16.zip.sig"
        },
        "project": "jdk",
        "scm_ref": "jdk-17+28_adopt-132-g23fbf51b850",
@@ -464,6 +464,24 @@ describe('setupJava', () => {
    }
  );

+  it('should fail when verify-signature is enabled for unsupported distributions', async () => {
+    mockJavaBase = new EmptyJavaBase({
+      version: '11',
+      architecture: 'x86',
+      packageType: 'jdk',
+      checkLatest: false,
+      verifySignature: true
+    });
+
+    await expect(mockJavaBase.setupJava()).rejects.toThrow(
+      "Input 'verify-signature' is not supported for distribution 'Empty'."
+    );
+    expect(spyTcFindAllVersions).not.toHaveBeenCalled();
+    expect(spyCoreAddPath).not.toHaveBeenCalled();
+    expect(spyCoreExportVariable).not.toHaveBeenCalled();
+    expect(spyCoreSetOutput).not.toHaveBeenCalled();
+  });
+
  it.each([
    [
      {
@@ -3,7 +3,11 @@ import * as tc from '@actions/tool-cache';
 import * as http from '@actions/http-client';
 import fs from 'fs';
 import path from 'path';
-import {GraalVMDistribution} from '../../src/distributions/graalvm/installer';
+import {
+  GraalVMCommunityDistribution,
+  GraalVMDistribution
+} from '../../src/distributions/graalvm/installer';
+import {getJavaDistribution} from '../../src/distributions/distribution-factory';
 import {JavaInstallerOptions} from '../../src/distributions/base-models';
 import * as util from '../../src/util';

@@ -41,6 +45,7 @@ beforeAll(() => {

 describe('GraalVMDistribution', () => {
  let distribution: GraalVMDistribution;
+  let communityDistribution: GraalVMCommunityDistribution;
  let mockHttpClient: jest.Mocked<http.HttpClient>;
  let spyCoreError: jest.SpyInstance;

@@ -55,9 +60,11 @@ describe('GraalVMDistribution', () => {
    jest.clearAllMocks();

    distribution = new GraalVMDistribution(defaultOptions);
+    communityDistribution = new GraalVMCommunityDistribution(defaultOptions);

    mockHttpClient = new http.HttpClient() as jest.Mocked<http.HttpClient>;
    (distribution as any).http = mockHttpClient;
+    (communityDistribution as any).http = mockHttpClient;

    (util.getDownloadArchiveExtension as jest.Mock).mockReturnValue('tar.gz');

@@ -242,6 +249,23 @@ describe('GraalVMDistribution', () => {
        path: '/cached/java/path'
      });
    });
+
+    it('should use a dedicated toolcache folder for GraalVM Community', async () => {
+      const result = await (communityDistribution as any).downloadTool(
+        javaRelease
+      );
+
+      expect(tc.cacheDir).toHaveBeenCalledWith(
+        path.join('/tmp/extracted', 'graalvm-jdk-17.0.5'),
+        'Java_GraalVM_Community_jdk',
+        '17.0.5',
+        'x64'
+      );
+      expect(result).toEqual({
+        version: '17.0.5',
+        path: '/cached/java/path'
+      });
+    });
  });

  describe('findPackageForDownload', () => {
@@ -948,5 +972,121 @@ describe('GraalVMDistribution', () => {
        configurable: true
      });
    });
+
+    describe('GraalVMCommunityDistribution', () => {
+      beforeEach(() => {
+        jest
+          .spyOn(communityDistribution, 'getPlatform')
+          .mockReturnValue('linux');
+      });
+
+      it('should resolve an exact GraalVM Community version from GitHub releases', async () => {
+        mockHttpClient.getJson.mockResolvedValue({
+          result: [
+            {
+              draft: false,
+              prerelease: false,
+              assets: [
+                {
+                  name: 'graalvm-community-jdk-21.0.2_linux-x64_bin.tar.gz',
+                  browser_download_url:
+                    'https://github.com/graalvm/graalvm-ce-builds/releases/download/jdk-21.0.2/graalvm-community-jdk-21.0.2_linux-x64_bin.tar.gz'
+                }
+              ]
+            }
+          ],
+          statusCode: 200,
+          headers: {}
+        });
+
+        const result = await (
+          communityDistribution as any
+        ).findPackageForDownload('21.0.2');
+
+        expect(result).toEqual({
+          url: 'https://github.com/graalvm/graalvm-ce-builds/releases/download/jdk-21.0.2/graalvm-community-jdk-21.0.2_linux-x64_bin.tar.gz',
+          version: '21.0.2'
+        });
+      });
+
+      it('should resolve the latest GraalVM Community release for a major version', async () => {
+        mockHttpClient.getJson.mockResolvedValue({
+          result: [
+            {
+              draft: false,
+              prerelease: false,
+              assets: [
+                {
+                  name: 'graalvm-community-jdk-21.0.1_linux-x64_bin.tar.gz',
+                  browser_download_url:
+                    'https://github.com/graalvm/graalvm-ce-builds/releases/download/jdk-21.0.1/graalvm-community-jdk-21.0.1_linux-x64_bin.tar.gz'
+                }
+              ]
+            },
+            {
+              draft: false,
+              prerelease: false,
+              assets: [
+                {
+                  name: 'graalvm-community-jdk-21.0.2_linux-x64_bin.tar.gz',
+                  browser_download_url:
+                    'https://github.com/graalvm/graalvm-ce-builds/releases/download/jdk-21.0.2/graalvm-community-jdk-21.0.2_linux-x64_bin.tar.gz'
+                }
+              ]
+            }
+          ],
+          statusCode: 200,
+          headers: {}
+        });
+
+        const result = await (
+          communityDistribution as any
+        ).findPackageForDownload('21');
+
+        expect(result).toEqual({
+          url: 'https://github.com/graalvm/graalvm-ce-builds/releases/download/jdk-21.0.2/graalvm-community-jdk-21.0.2_linux-x64_bin.tar.gz',
+          version: '21.0.2'
+        });
+      });
+
+      it('should reject GraalVM Community early access requests', async () => {
+        (communityDistribution as any).stable = false;
+
+        await expect(
+          (communityDistribution as any).findPackageForDownload('23')
+        ).rejects.toThrow(
+          'GraalVM Community does not provide early access builds'
+        );
+      });
+
+      it('should surface an error when the releases listing is not an array', async () => {
+        mockHttpClient.getJson.mockResolvedValue({
+          result: {message: 'API rate limit exceeded'},
+          statusCode: 403,
+          headers: {}
+        });
+
+        await expect(
+          (communityDistribution as any).findPackageForDownload('21')
+        ).rejects.toThrow(
+          /Unexpected response while listing GraalVM Community releases.*HTTP status code: 403/s
+        );
+      });
+    });
+  });
+});
+
+describe('distribution factory', () => {
+  const defaultOptions: JavaInstallerOptions = {
+    version: '17',
+    architecture: 'x64',
+    packageType: 'jdk',
+    checkLatest: false
+  };
+
+  it('should map graalvm-community to the community installer', () => {
+    const community = getJavaDistribution('graalvm-community', defaultOptions);
+
+    expect(community).toBeInstanceOf(GraalVMCommunityDistribution);
  });
 });
@@ -1,8 +1,15 @@
-import {MicrosoftDistributions} from '../../src/distributions/microsoft/installer';
+import {
+  MicrosoftDistributions,
+  MICROSOFT_PUBLIC_KEY
+} from '../../src/distributions/microsoft/installer';
 import os from 'os';
 import data from '../data/microsoft.json';
 import * as httpm from '@actions/http-client';
 import * as core from '@actions/core';
+import * as tc from '@actions/tool-cache';
+import * as gpg from '../../src/gpg';
+import * as util from '../../src/util';
+import fs from 'fs';

 describe('findPackageForDownload', () => {
  let distribution: MicrosoftDistributions;
@@ -102,6 +109,7 @@ describe('findPackageForDownload', () => {
      .replace('{{OS_TYPE}}', os)
      .replace('{{ARCHIVE_TYPE}}', archive);
    expect(result.url).toBe(url);
+    expect(result.signatureUrl).toBe(`${url}.sig`);
  });

  it.each([
@@ -187,4 +195,153 @@ describe('findPackageForDownload', () => {
      /No matching version found for SemVer */
    );
  });
+
+  it('uses manifest-provided signature URL when available', async () => {
+    spyGetManifestFromRepo.mockReturnValue({
+      result: [
+        {
+          version: '17.0.10',
+          stable: true,
+          release_url: 'https://example.test',
+          files: [
+            {
+              filename: 'microsoft-jdk-17.0.10-linux-x64.tar.gz',
+              arch: 'x64',
+              platform: 'linux',
+              download_url: 'https://example.test/jdk.tar.gz',
+              signature_url: 'https://example.test/jdk.tar.gz.custom.sig'
+            }
+          ]
+        }
+      ],
+      statusCode: 200,
+      headers: {}
+    });
+    jest.spyOn(os, 'platform').mockReturnValue('linux');
+
+    const result = await distribution['findPackageForDownload']('17.0.10');
+
+    expect(result.signatureUrl).toBe(
+      'https://example.test/jdk.tar.gz.custom.sig'
+    );
+  });
+});
+
+describe('downloadTool', () => {
+  let spyDownloadTool: jest.SpyInstance;
+  let spyExtractJdkFile: jest.SpyInstance;
+  let spyCacheDir: jest.SpyInstance;
+  let spyVerifySignature: jest.SpyInstance;
+  let distribution: MicrosoftDistributions;
+
+  beforeEach(() => {
+    jest
+      .spyOn(os, 'platform')
+      .mockReturnValue(process.platform as ReturnType<typeof os.platform>);
+
+    distribution = new MicrosoftDistributions({
+      version: '17',
+      architecture: 'x64',
+      packageType: 'jdk',
+      checkLatest: false
+    });
+
+    spyDownloadTool = jest.spyOn(tc, 'downloadTool');
+    spyDownloadTool.mockImplementation(async () => {
+      return '/tmp/jdk.tar.gz';
+    });
+
+    spyExtractJdkFile = jest.spyOn(util, 'extractJdkFile');
+    spyExtractJdkFile.mockImplementation(async () => {
+      return '/tmp/unpacked';
+    });
+
+    jest.spyOn(fs, 'readdirSync').mockReturnValue(['jdk'] as any);
+    spyCacheDir = jest.spyOn(tc, 'cacheDir');
+    spyCacheDir.mockImplementation(async () => {
+      return '/tmp/cached';
+    });
+
+    jest
+      .spyOn(util, 'renameWinArchive')
+      .mockImplementation((archivePath: string) => `${archivePath}.zip`);
+
+    spyVerifySignature = jest.spyOn(gpg, 'verifyPackageSignature');
+    spyVerifySignature.mockImplementation(async () => {});
+  });
+
+  afterEach(() => {
+    jest.restoreAllMocks();
+  });
+
+  it('verifies signature when enabled', async () => {
+    const signedDistribution = new MicrosoftDistributions({
+      version: '17',
+      architecture: 'x64',
+      packageType: 'jdk',
+      checkLatest: false,
+      verifySignature: true
+    });
+
+    await signedDistribution['downloadTool']({
+      version: '17.0.14+7',
+      url: 'https://example.com/jdk.tar.gz',
+      signatureUrl: 'https://example.com/jdk.tar.gz.sig'
+    });
+
+    expect(spyVerifySignature).toHaveBeenCalledWith(
+      '/tmp/jdk.tar.gz',
+      'https://example.com/jdk.tar.gz.sig',
+      MICROSOFT_PUBLIC_KEY
+    );
+  });
+
+  it('uses custom public key when verifySignaturePublicKey is provided', async () => {
+    const customKey =
+      '-----BEGIN PGP PUBLIC KEY BLOCK-----\ncustom\n-----END PGP PUBLIC KEY BLOCK-----';
+    const signedDistribution = new MicrosoftDistributions({
+      version: '17',
+      architecture: 'x64',
+      packageType: 'jdk',
+      checkLatest: false,
+      verifySignature: true,
+      verifySignaturePublicKey: customKey
+    });
+
+    await signedDistribution['downloadTool']({
+      version: '17.0.14+7',
+      url: 'https://example.com/jdk.tar.gz',
+      signatureUrl: 'https://example.com/jdk.tar.gz.sig'
+    });
+
+    expect(spyVerifySignature).toHaveBeenCalledWith(
+      '/tmp/jdk.tar.gz',
+      'https://example.com/jdk.tar.gz.sig',
+      customKey
+    );
+  });
+
+  it('fails when signature is missing and verification is enabled', async () => {
+    const signedDistribution = new MicrosoftDistributions({
+      version: '17',
+      architecture: 'x64',
+      packageType: 'jdk',
+      checkLatest: false,
+      verifySignature: true
+    });
+
+    await expect(
+      signedDistribution['downloadTool']({
+        version: '17.0.14+7',
+        url: 'https://example.com/jdk.tar.gz'
+      })
+    ).rejects.toThrow(
+      "Input 'verify-signature' is enabled, but no signature URL was found for Microsoft Build of OpenJDK version 17.0.14+7."
+    );
+    expect(spyVerifySignature).not.toHaveBeenCalled();
+  });
+
+  it('supports signature verification', () => {
+    expect(distribution['supportsSignatureVerification']()).toBe(true);
+  });
 });
@@ -1,10 +1,15 @@
 import {HttpClient} from '@actions/http-client';
+import * as tc from '@actions/tool-cache';
+import fs from 'fs';
 import os from 'os';
 import {
  TemurinDistribution,
-  TemurinImplementation
+  TemurinImplementation,
+  ADOPTIUM_PUBLIC_KEY
 } from '../../src/distributions/temurin/installer';
 import {JavaInstallerOptions} from '../../src/distributions/base-models';
+import * as util from '../../src/util';
+import * as gpg from '../../src/gpg';

 import manifestData from '../data/temurin.json';
 import * as core from '@actions/core';
@@ -231,6 +236,7 @@ describe('findPackageForDownload', () => {
    distribution['getAvailableVersions'] = async () => manifestData as any;
    const resolvedVersion = await distribution['findPackageForDownload'](input);
    expect(resolvedVersion.version).toBe(expected);
+    expect(resolvedVersion.signatureUrl).toBeDefined();
  });

  it('version is found but binaries list is empty', async () => {
@@ -281,3 +287,109 @@ describe('findPackageForDownload', () => {
    );
  });
 });
+
+describe('downloadTool', () => {
+  let spyDownloadTool: jest.SpyInstance;
+  let spyVerifySignature: jest.SpyInstance;
+  let spyExtractJdkFile: jest.SpyInstance;
+  let spyCacheDir: jest.SpyInstance;
+  let spyReadDirSync: jest.SpyInstance;
+  let spyRenameWinArchive: jest.SpyInstance;
+
+  beforeEach(() => {
+    spyDownloadTool = jest.spyOn(tc, 'downloadTool');
+    spyDownloadTool.mockResolvedValue('/tmp/jdk.tar.gz');
+    spyVerifySignature = jest.spyOn(gpg, 'verifyPackageSignature');
+    spyVerifySignature.mockResolvedValue(undefined);
+    spyExtractJdkFile = jest.spyOn(util, 'extractJdkFile');
+    spyExtractJdkFile.mockResolvedValue('/tmp/extracted');
+    spyCacheDir = jest.spyOn(tc, 'cacheDir');
+    spyCacheDir.mockResolvedValue('/tmp/toolcache');
+    spyReadDirSync = jest.spyOn(fs, 'readdirSync');
+    spyReadDirSync.mockReturnValue(['jdk-17'] as any);
+    spyRenameWinArchive = jest.spyOn(util, 'renameWinArchive');
+    spyRenameWinArchive.mockReturnValue('/tmp/jdk.tar.gz.zip');
+  });
+
+  afterEach(() => {
+    jest.resetAllMocks();
+    jest.clearAllMocks();
+    jest.restoreAllMocks();
+  });
+
+  it('verifies signature when enabled', async () => {
+    const distribution = new TemurinDistribution(
+      {
+        version: '17',
+        architecture: 'x64',
+        packageType: 'jdk',
+        checkLatest: false,
+        verifySignature: true
+      },
+      TemurinImplementation.Hotspot
+    );
+
+    await distribution['downloadTool']({
+      version: '17.0.14+7',
+      url: 'https://example.com/jdk.tar.gz',
+      signatureUrl: 'https://example.com/jdk.tar.gz.sig'
+    });
+
+    expect(spyVerifySignature).toHaveBeenCalledWith(
+      '/tmp/jdk.tar.gz',
+      'https://example.com/jdk.tar.gz.sig',
+      ADOPTIUM_PUBLIC_KEY
+    );
+  });
+
+  it('fails when signature is missing and verification is enabled', async () => {
+    const distribution = new TemurinDistribution(
+      {
+        version: '17',
+        architecture: 'x64',
+        packageType: 'jdk',
+        checkLatest: false,
+        verifySignature: true
+      },
+      TemurinImplementation.Hotspot
+    );
+
+    await expect(
+      distribution['downloadTool']({
+        version: '17.0.14+7',
+        url: 'https://example.com/jdk.tar.gz'
+      })
+    ).rejects.toThrow(
+      "Input 'verify-signature' is enabled, but no signature URL was found"
+    );
+    expect(spyVerifySignature).not.toHaveBeenCalled();
+  });
+
+  it('uses custom public key when verifySignaturePublicKey is provided', async () => {
+    const customKey =
+      '-----BEGIN PGP PUBLIC KEY BLOCK-----\ncustom\n-----END PGP PUBLIC KEY BLOCK-----';
+    const distribution = new TemurinDistribution(
+      {
+        version: '17',
+        architecture: 'x64',
+        packageType: 'jdk',
+        checkLatest: false,
+        verifySignature: true,
+        verifySignaturePublicKey: customKey
+      },
+      TemurinImplementation.Hotspot
+    );
+
+    await distribution['downloadTool']({
+      version: '17.0.14+7',
+      url: 'https://example.com/jdk.tar.gz',
+      signatureUrl: 'https://example.com/jdk.tar.gz.sig'
+    });
+
+    expect(spyVerifySignature).toHaveBeenCalledWith(
+      '/tmp/jdk.tar.gz',
+      'https://example.com/jdk.tar.gz.sig',
+      customKey
+    );
+  });
+});
@@ -1,6 +1,7 @@
 import * as path from 'path';
 import * as io from '@actions/io';
 import * as exec from '@actions/exec';
+import * as tc from '@actions/tool-cache';
 import * as gpg from '../src/gpg';

 jest.mock('@actions/exec', () => {
@@ -9,6 +10,12 @@ jest.mock('@actions/exec', () => {
  };
 });

+jest.mock('@actions/tool-cache', () => {
+  return {
+    downloadTool: jest.fn()
+  };
+});
+
 const tempDir = path.join(__dirname, 'runner', 'temp');
 process.env['RUNNER_TEMP'] = tempDir;

@@ -25,6 +32,35 @@ describe('gpg tests', () => {
    }
  });

+  describe('toGpgPath', () => {
+    const originalPlatform = process.platform;
+
+    afterEach(() => {
+      Object.defineProperty(process, 'platform', {value: originalPlatform});
+    });
+
+    it('returns path unchanged on non-Windows platforms', () => {
+      Object.defineProperty(process, 'platform', {value: 'linux'});
+      expect(gpg.toGpgPath('/tmp/some/path')).toBe('/tmp/some/path');
+      expect(gpg.toGpgPath('D:\\a\\_temp\\file')).toBe('D:\\a\\_temp\\file');
+    });
+
+    it('converts Windows backslashes and drive letter to POSIX path on Windows', () => {
+      Object.defineProperty(process, 'platform', {value: 'win32'});
+      expect(gpg.toGpgPath('D:\\a\\_temp\\gpg-home')).toBe(
+        '/d/a/_temp/gpg-home'
+      );
+      expect(
+        gpg.toGpgPath('C:\\Users\\runner\\AppData\\Local\\Temp\\key.asc')
+      ).toBe('/c/Users/runner/AppData/Local/Temp/key.asc');
+    });
+
+    it('handles uppercase and lowercase drive letters on Windows', () => {
+      Object.defineProperty(process, 'platform', {value: 'win32'});
+      expect(gpg.toGpgPath('d:\\a\\_temp\\file')).toBe('/d/a/_temp/file');
+    });
+  });
+
  describe('importKey', () => {
    it('attempts to import private key and returns null key id on failure', async () => {
      const privateKey = 'KEY CONTENTS';
@@ -51,5 +87,47 @@ describe('gpg tests', () => {
        expect.anything()
      );
    });
+
+    describe('verifyPackageSignature', () => {
+      it('imports bundled key and verifies package', async () => {
+        const publicKeyContent =
+          '-----BEGIN PGP PUBLIC KEY BLOCK-----\ntest\n-----END PGP PUBLIC KEY BLOCK-----';
+        (tc.downloadTool as jest.Mock).mockResolvedValue('/tmp/jdk.tar.gz.sig');
+        await gpg.verifyPackageSignature(
+          '/tmp/jdk.tar.gz',
+          'https://example.com/jdk.tar.gz.sig',
+          publicKeyContent
+        );
+
+        expect(tc.downloadTool).toHaveBeenCalledWith(
+          'https://example.com/jdk.tar.gz.sig'
+        );
+        expect(exec.exec).toHaveBeenNthCalledWith(
+          1,
+          'gpg',
+          [
+            '--homedir',
+            expect.any(String),
+            '--batch',
+            '--import',
+            expect.stringContaining('public-key.asc')
+          ],
+          expect.objectContaining({silent: true})
+        );
+        expect(exec.exec).toHaveBeenNthCalledWith(
+          2,
+          'gpg',
+          [
+            '--homedir',
+            expect.any(String),
+            '--batch',
+            '--verify',
+            '/tmp/jdk.tar.gz.sig',
+            '/tmp/jdk.tar.gz'
+          ],
+          expect.objectContaining({silent: true})
+        );
+      });
+    });
  });
 });
@@ -26,6 +26,13 @@ inputs:
    description: 'Set this option if you want the action to check for the latest available version that satisfies the version spec'
    required: false
    default: false
+  verify-signature:
+    description: 'Verify downloaded Java package signatures when supported by the selected distribution'
+    required: false
+    default: false
+  verify-signature-public-key:
+    description: 'ASCII-armored GPG public key used to verify the downloaded package signature. Overrides the default bundled key for the selected distribution.'
+    required: false
  server-id:
    description: 'ID of the distributionManagement repository in the pom.xml
       file. Default is `github`'
@@ -52241,7 +52241,7 @@ else {
 "use strict";

 Object.defineProperty(exports, "__esModule", ({ value: true }));
-exports.DISTRIBUTIONS_ONLY_MAJOR_VERSION = exports.INPUT_MVN_TOOLCHAIN_VENDOR = exports.INPUT_MVN_TOOLCHAIN_ID = exports.MVN_TOOLCHAINS_FILE = exports.MVN_SETTINGS_FILE = exports.M2_DIR = exports.STATE_GPG_PRIVATE_KEY_FINGERPRINT = exports.INPUT_JOB_STATUS = exports.INPUT_CACHE_DEPENDENCY_PATH = exports.INPUT_CACHE = exports.INPUT_DEFAULT_GPG_PASSPHRASE = exports.INPUT_DEFAULT_GPG_PRIVATE_KEY = exports.INPUT_GPG_PASSPHRASE = exports.INPUT_GPG_PRIVATE_KEY = exports.INPUT_OVERWRITE_SETTINGS = exports.INPUT_SETTINGS_PATH = exports.INPUT_SERVER_PASSWORD = exports.INPUT_SERVER_USERNAME = exports.INPUT_SERVER_ID = exports.INPUT_CHECK_LATEST = exports.INPUT_JDK_FILE = exports.INPUT_DISTRIBUTION = exports.INPUT_JAVA_PACKAGE = exports.INPUT_ARCHITECTURE = exports.INPUT_JAVA_VERSION_FILE = exports.INPUT_JAVA_VERSION = exports.MACOS_JAVA_CONTENT_POSTFIX = void 0;
+exports.DISTRIBUTIONS_ONLY_MAJOR_VERSION = exports.INPUT_MVN_TOOLCHAIN_VENDOR = exports.INPUT_MVN_TOOLCHAIN_ID = exports.MVN_TOOLCHAINS_FILE = exports.MVN_SETTINGS_FILE = exports.M2_DIR = exports.STATE_GPG_PRIVATE_KEY_FINGERPRINT = exports.INPUT_JOB_STATUS = exports.INPUT_CACHE_DEPENDENCY_PATH = exports.INPUT_CACHE = exports.INPUT_DEFAULT_GPG_PASSPHRASE = exports.INPUT_DEFAULT_GPG_PRIVATE_KEY = exports.INPUT_GPG_PASSPHRASE = exports.INPUT_GPG_PRIVATE_KEY = exports.INPUT_OVERWRITE_SETTINGS = exports.INPUT_SETTINGS_PATH = exports.INPUT_SERVER_PASSWORD = exports.INPUT_SERVER_USERNAME = exports.INPUT_SERVER_ID = exports.INPUT_VERIFY_SIGNATURE_PUBLIC_KEY = exports.INPUT_VERIFY_SIGNATURE = exports.INPUT_CHECK_LATEST = exports.INPUT_JDK_FILE = exports.INPUT_DISTRIBUTION = exports.INPUT_JAVA_PACKAGE = exports.INPUT_ARCHITECTURE = exports.INPUT_JAVA_VERSION_FILE = exports.INPUT_JAVA_VERSION = exports.MACOS_JAVA_CONTENT_POSTFIX = void 0;
 exports.MACOS_JAVA_CONTENT_POSTFIX = 'Contents/Home';
 exports.INPUT_JAVA_VERSION = 'java-version';
 exports.INPUT_JAVA_VERSION_FILE = 'java-version-file';
@@ -52250,6 +52250,8 @@ exports.INPUT_JAVA_PACKAGE = 'java-package';
 exports.INPUT_DISTRIBUTION = 'distribution';
 exports.INPUT_JDK_FILE = 'jdkFile';
 exports.INPUT_CHECK_LATEST = 'check-latest';
+exports.INPUT_VERIFY_SIGNATURE = 'verify-signature';
+exports.INPUT_VERIFY_SIGNATURE_PUBLIC_KEY = 'verify-signature-public-key';
 exports.INPUT_SERVER_ID = 'server-id';
 exports.INPUT_SERVER_USERNAME = 'server-username';
 exports.INPUT_SERVER_PASSWORD = 'server-password';
@@ -52311,14 +52313,27 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
    });
 };
 Object.defineProperty(exports, "__esModule", ({ value: true }));
-exports.deleteKey = exports.importKey = exports.PRIVATE_KEY_FILE = void 0;
+exports.verifyPackageSignature = exports.deleteKey = exports.importKey = exports.toGpgPath = exports.PRIVATE_KEY_FILE = void 0;
 const fs = __importStar(__nccwpck_require__(79896));
 const path = __importStar(__nccwpck_require__(16928));
 const io = __importStar(__nccwpck_require__(94994));
 const exec = __importStar(__nccwpck_require__(95236));
+const tc = __importStar(__nccwpck_require__(33472));
 const util = __importStar(__nccwpck_require__(54527));
 exports.PRIVATE_KEY_FILE = path.join(util.getTempDir(), 'private-key.asc');
 const PRIVATE_KEY_FINGERPRINT_REGEX = /\w{40}/;
+// Convert a Windows path (D:\a\_temp\...) to a POSIX path (/d/a/_temp/...).
+// The Git-bundled GPG on Windows (MSYS2-based) uses POSIX path conventions
+// internally. Passing Windows paths with backslashes can cause fatal GPG errors
+// (exit code 2), so all paths passed to GPG must be in POSIX format on Windows.
+function toGpgPath(p) {
+    if (process.platform !== 'win32')
+        return p;
+    return p
+        .replace(/\\/g, '/')
+        .replace(/^([A-Za-z]):\//, (_, drive) => `/${drive.toLowerCase()}/`);
+}
+exports.toGpgPath = toGpgPath;
 function importKey(privateKey) {
    return __awaiter(this, void 0, void 0, function* () {
        fs.writeFileSync(exports.PRIVATE_KEY_FILE, privateKey, {
@@ -52355,6 +52370,49 @@ function deleteKey(keyFingerprint) {
    });
 }
 exports.deleteKey = deleteKey;
+function verifyPackageSignature(archivePath, signatureUrl, publicKeyContent) {
+    return __awaiter(this, void 0, void 0, function* () {
+        const signaturePath = yield tc.downloadTool(signatureUrl);
+        let gpgHome;
+        try {
+            gpgHome = fs.mkdtempSync(path.join(util.getTempDir(), 'verify-signature-gpg-home-'));
+        }
+        catch (error) {
+            try {
+                yield io.rmRF(signaturePath);
+            }
+            catch (_a) {
+                // ignore cleanup failures
+            }
+            throw new Error(`Failed to create temporary GPG home directory for signature verification: ${error.message}`);
+        }
+        try {
+            const publicKeyFile = path.join(gpgHome, 'public-key.asc');
+            fs.writeFileSync(publicKeyFile, publicKeyContent, { encoding: 'utf-8' });
+            const options = { silent: true };
+            yield exec.exec('gpg', [
+                '--homedir',
+                toGpgPath(gpgHome),
+                '--batch',
+                '--import',
+                toGpgPath(publicKeyFile)
+            ], options);
+            yield exec.exec('gpg', [
+                '--homedir',
+                toGpgPath(gpgHome),
+                '--batch',
+                '--verify',
+                toGpgPath(signaturePath),
+                toGpgPath(archivePath)
+            ], options);
+        }
+        finally {
+            yield io.rmRF(signaturePath);
+            yield io.rmRF(gpgHome);
+        }
+    });
+}
+exports.verifyPackageSignature = verifyPackageSignature;


 /***/ }),
@@ -78000,7 +78000,7 @@ function isProbablyGradleDaemonProblem(packageManager, error) {
 "use strict";

 Object.defineProperty(exports, "__esModule", ({ value: true }));
-exports.DISTRIBUTIONS_ONLY_MAJOR_VERSION = exports.INPUT_MVN_TOOLCHAIN_VENDOR = exports.INPUT_MVN_TOOLCHAIN_ID = exports.MVN_TOOLCHAINS_FILE = exports.MVN_SETTINGS_FILE = exports.M2_DIR = exports.STATE_GPG_PRIVATE_KEY_FINGERPRINT = exports.INPUT_JOB_STATUS = exports.INPUT_CACHE_DEPENDENCY_PATH = exports.INPUT_CACHE = exports.INPUT_DEFAULT_GPG_PASSPHRASE = exports.INPUT_DEFAULT_GPG_PRIVATE_KEY = exports.INPUT_GPG_PASSPHRASE = exports.INPUT_GPG_PRIVATE_KEY = exports.INPUT_OVERWRITE_SETTINGS = exports.INPUT_SETTINGS_PATH = exports.INPUT_SERVER_PASSWORD = exports.INPUT_SERVER_USERNAME = exports.INPUT_SERVER_ID = exports.INPUT_CHECK_LATEST = exports.INPUT_JDK_FILE = exports.INPUT_DISTRIBUTION = exports.INPUT_JAVA_PACKAGE = exports.INPUT_ARCHITECTURE = exports.INPUT_JAVA_VERSION_FILE = exports.INPUT_JAVA_VERSION = exports.MACOS_JAVA_CONTENT_POSTFIX = void 0;
+exports.DISTRIBUTIONS_ONLY_MAJOR_VERSION = exports.INPUT_MVN_TOOLCHAIN_VENDOR = exports.INPUT_MVN_TOOLCHAIN_ID = exports.MVN_TOOLCHAINS_FILE = exports.MVN_SETTINGS_FILE = exports.M2_DIR = exports.STATE_GPG_PRIVATE_KEY_FINGERPRINT = exports.INPUT_JOB_STATUS = exports.INPUT_CACHE_DEPENDENCY_PATH = exports.INPUT_CACHE = exports.INPUT_DEFAULT_GPG_PASSPHRASE = exports.INPUT_DEFAULT_GPG_PRIVATE_KEY = exports.INPUT_GPG_PASSPHRASE = exports.INPUT_GPG_PRIVATE_KEY = exports.INPUT_OVERWRITE_SETTINGS = exports.INPUT_SETTINGS_PATH = exports.INPUT_SERVER_PASSWORD = exports.INPUT_SERVER_USERNAME = exports.INPUT_SERVER_ID = exports.INPUT_VERIFY_SIGNATURE_PUBLIC_KEY = exports.INPUT_VERIFY_SIGNATURE = exports.INPUT_CHECK_LATEST = exports.INPUT_JDK_FILE = exports.INPUT_DISTRIBUTION = exports.INPUT_JAVA_PACKAGE = exports.INPUT_ARCHITECTURE = exports.INPUT_JAVA_VERSION_FILE = exports.INPUT_JAVA_VERSION = exports.MACOS_JAVA_CONTENT_POSTFIX = void 0;
 exports.MACOS_JAVA_CONTENT_POSTFIX = 'Contents/Home';
 exports.INPUT_JAVA_VERSION = 'java-version';
 exports.INPUT_JAVA_VERSION_FILE = 'java-version-file';
@@ -78009,6 +78009,8 @@ exports.INPUT_JAVA_PACKAGE = 'java-package';
 exports.INPUT_DISTRIBUTION = 'distribution';
 exports.INPUT_JDK_FILE = 'jdkFile';
 exports.INPUT_CHECK_LATEST = 'check-latest';
+exports.INPUT_VERIFY_SIGNATURE = 'verify-signature';
+exports.INPUT_VERIFY_SIGNATURE_PUBLIC_KEY = 'verify-signature-public-key';
 exports.INPUT_SERVER_ID = 'server-id';
 exports.INPUT_SERVER_USERNAME = 'server-username';
 exports.INPUT_SERVER_PASSWORD = 'server-password';
@@ -78308,6 +78310,7 @@ const constants_1 = __nccwpck_require__(27242);
 const os_1 = __importDefault(__nccwpck_require__(70857));
 class JavaBase {
    constructor(distribution, installerOptions) {
+        var _a;
        this.distribution = distribution;
        this.http = new httpm.HttpClient('actions/setup-java', undefined, {
            allowRetries: true,
@@ -78317,10 +78320,15 @@ class JavaBase {
        this.architecture = installerOptions.architecture || os_1.default.arch();
        this.packageType = installerOptions.packageType;
        this.checkLatest = installerOptions.checkLatest;
+        this.verifySignature = (_a = installerOptions.verifySignature) !== null && _a !== void 0 ? _a : false;
+        this.verifySignaturePublicKey = installerOptions.verifySignaturePublicKey;
    }
    setupJava() {
        var _a, _b;
        return __awaiter(this, void 0, void 0, function* () {
+            if (this.verifySignature && !this.supportsSignatureVerification()) {
+                throw new Error(`Input 'verify-signature' is not supported for distribution '${this.distribution}'.`);
+            }
            let foundJava = this.findInToolcache();
            if (foundJava && !this.checkLatest) {
                core.info(`Resolved Java ${foundJava.version} from tool-cache`);
@@ -78440,6 +78448,9 @@ class JavaBase {
    get toolcacheFolderName() {
        return `Java_${this.distribution}_${this.packageType}`;
    }
+    supportsSignatureVerification() {
+        return false;
+    }
    getToolcacheVersionName(version) {
        if (!this.stable) {
            if (version.includes('+')) {
@@ -78771,6 +78782,7 @@ var JavaDistribution;
    JavaDistribution["Dragonwell"] = "dragonwell";
    JavaDistribution["SapMachine"] = "sapmachine";
    JavaDistribution["GraalVM"] = "graalvm";
+    JavaDistribution["GraalVMCommunity"] = "graalvm-community";
    JavaDistribution["JetBrains"] = "jetbrains";
 })(JavaDistribution || (JavaDistribution = {}));
 function getJavaDistribution(distributionName, installerOptions, jdkFile) {
@@ -78802,6 +78814,8 @@ function getJavaDistribution(distributionName, installerOptions, jdkFile) {
            return new installer_11.SapMachineDistribution(installerOptions);
        case JavaDistribution.GraalVM:
            return new installer_12.GraalVMDistribution(installerOptions);
+        case JavaDistribution.GraalVMCommunity:
+            return new installer_12.GraalVMCommunityDistribution(installerOptions);
        case JavaDistribution.JetBrains:
            return new installer_13.JetBrainsDistribution(installerOptions);
        default:
@@ -79069,23 +79083,29 @@ var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
 };
 Object.defineProperty(exports, "__esModule", ({ value: true }));
-exports.GraalVMDistribution = void 0;
+exports.GraalVMCommunityDistribution = exports.GraalVMDistribution = void 0;
 const core = __importStar(__nccwpck_require__(37484));
 const tc = __importStar(__nccwpck_require__(33472));
 const fs_1 = __importDefault(__nccwpck_require__(79896));
 const path_1 = __importDefault(__nccwpck_require__(16928));
+const semver_1 = __importDefault(__nccwpck_require__(62088));
 const base_installer_1 = __nccwpck_require__(79935);
 const http_client_1 = __nccwpck_require__(54844);
 const util_1 = __nccwpck_require__(54527);
 const GRAALVM_DL_BASE = 'https://download.oracle.com/graalvm';
 const GRAALVM_DOWNLOAD_URL = 'https://www.graalvm.org/downloads/';
+const GRAALVM_COMMUNITY_RELEASES_URL = 'https://api.github.com/repos/graalvm/graalvm-ce-builds/releases?per_page=100';
+const GRAALVM_COMMUNITY_RELEASES_PAGE_ORIGIN = 'https://api.github.com';
+const GRAALVM_COMMUNITY_DOWNLOAD_URL = 'https://github.com/graalvm/graalvm-ce-builds/releases';
+const GRAALVM_COMMUNITY_ASSET_PREFIX = 'graalvm-community-jdk-';
+const GRAALVM_COMMUNITY_VERSION_PATTERN = /^\d+(?:\.\d+)*$/;
 const IS_WINDOWS = process.platform === 'win32';
 const GRAALVM_PLATFORM = IS_WINDOWS ? 'windows' : process.platform;
 const GRAALVM_MIN_VERSION = 17;
 const SUPPORTED_ARCHITECTURES = ['x64', 'aarch64'];
 class GraalVMDistribution extends base_installer_1.JavaBase {
-    constructor(installerOptions) {
-        super('GraalVM', installerOptions);
+    constructor(installerOptions, distributionName = 'GraalVM') {
+        super(distributionName, installerOptions);
    }
    downloadTool(javaRelease) {
        return __awaiter(this, void 0, void 0, function* () {
@@ -79119,19 +79139,33 @@ class GraalVMDistribution extends base_installer_1.JavaBase {
    }
    findPackageForDownload(range) {
        return __awaiter(this, void 0, void 0, function* () {
-            // Add input validation
+            this.validateVersionRange(range);
+            const arch = this.getSupportedArchitecture();
+            if (!this.stable) {
+                return this.findEABuildDownloadUrl(`${range}-ea`);
+            }
+            const { platform, extension, major } = this.validateStableBuildRequest(range);
+            const fileUrl = this.constructFileUrl(range, major, platform, arch, extension);
+            const response = yield this.http.head(fileUrl);
+            this.handleHttpResponse(response, range);
+            return { url: fileUrl, version: range };
+        });
+    }
+    validateVersionRange(range) {
        if (!range || typeof range !== 'string') {
            throw new Error('Version range is required and must be a string');
        }
+    }
+    getSupportedArchitecture() {
        const arch = this.distributionArchitecture();
        if (!SUPPORTED_ARCHITECTURES.includes(arch)) {
            throw new Error(`Unsupported architecture: ${this.architecture}. Supported architectures are: ${SUPPORTED_ARCHITECTURES.join(', ')}`);
        }
-            if (!this.stable) {
-                return this.findEABuildDownloadUrl(`${range}-ea`);
+        return arch;
    }
+    validateStableBuildRequest(range) {
        if (this.packageType !== 'jdk') {
-                throw new Error('GraalVM provides only the `jdk` package type');
+            throw new Error(`${this.distribution} provides only the \`jdk\` package type`);
        }
        const platform = this.getPlatform();
        const extension = (0, util_1.getDownloadArchiveExtension)();
@@ -79141,13 +79175,13 @@ class GraalVMDistribution extends base_installer_1.JavaBase {
            throw new Error(`Invalid version format: ${range}`);
        }
        if (majorVersion < GRAALVM_MIN_VERSION) {
-                throw new Error(`GraalVM is only supported for JDK ${GRAALVM_MIN_VERSION} and later. Requested version: ${major}`);
+            throw new Error(`${this.distribution} is only supported for JDK ${GRAALVM_MIN_VERSION} and later. Requested version: ${major}`);
        }
-            const fileUrl = this.constructFileUrl(range, major, platform, arch, extension);
-            const response = yield this.http.head(fileUrl);
-            this.handleHttpResponse(response, range);
-            return { url: fileUrl, version: range };
-        });
+        return {
+            platform,
+            major,
+            extension
+        };
    }
    constructFileUrl(range, major, platform, arch, extension) {
        return range.includes('.')
@@ -79239,6 +79273,101 @@ class GraalVMDistribution extends base_installer_1.JavaBase {
    }
 }
 exports.GraalVMDistribution = GraalVMDistribution;
+class GraalVMCommunityDistribution extends GraalVMDistribution {
+    constructor(installerOptions) {
+        super(installerOptions, 'GraalVM Community');
+    }
+    get toolcacheFolderName() {
+        return `Java_GraalVM_Community_${this.packageType}`;
+    }
+    findPackageForDownload(range) {
+        return __awaiter(this, void 0, void 0, function* () {
+            this.validateVersionRange(range);
+            if (!this.stable) {
+                throw new Error('GraalVM Community does not provide early access builds');
+            }
+            const arch = this.getSupportedArchitecture();
+            const { platform, extension } = this.validateStableBuildRequest(range);
+            // GraalVM Community asset names embed the platform, architecture and
+            // archive type, e.g. `graalvm-community-jdk-21.0.2_linux-x64_bin.tar.gz`.
+            const assetSuffix = `_${platform}-${arch}_bin.${extension}`;
+            const availableVersions = yield this.getAvailableVersions(assetSuffix);
+            const satisfiedVersion = availableVersions
+                .filter(item => (0, util_1.isVersionSatisfies)(range, item.version))
+                .sort((a, b) => -semver_1.default.compareBuild(a.version, b.version))[0];
+            if (!satisfiedVersion) {
+                const error = this.createVersionNotFoundError(range, availableVersions.map(item => item.version), `Platform: ${platform}`);
+                error.message += `\nPlease check if this version is available at ${GRAALVM_COMMUNITY_DOWNLOAD_URL}.`;
+                throw error;
+            }
+            return satisfiedVersion;
+        });
+    }
+    getAvailableVersions(assetSuffix) {
+        var _a;
+        return __awaiter(this, void 0, void 0, function* () {
+            const headers = (0, util_1.getGitHubHttpHeaders)();
+            const versions = new Map();
+            let releasesUrl = GRAALVM_COMMUNITY_RELEASES_URL;
+            for (let pageIndex = 0; releasesUrl && pageIndex < util_1.MAX_PAGINATION_PAGES; pageIndex++) {
+                const response = yield this.http.getJson(releasesUrl, headers);
+                // A successful GitHub releases listing is always a JSON array (possibly
+                // empty). Anything else indicates an unexpected/error payload (rate
+                // limiting, auth failure, etc.) that must be surfaced instead of being
+                // silently treated as "no releases", which would later look like a
+                // misleading "version not found" error.
+                if (!Array.isArray(response.result)) {
+                    throw new Error(`Unexpected response while listing GraalVM Community releases from ${releasesUrl} ` +
+                        `(HTTP status code: ${response.statusCode}). Expected a JSON array of releases. ` +
+                        `Please check if the service is available at ${GRAALVM_COMMUNITY_DOWNLOAD_URL}.`);
+                }
+                const releases = response.result;
+                if (releases.length === 0) {
+                    break;
+                }
+                for (const release of releases) {
+                    if (release.draft || release.prerelease) {
+                        continue;
+                    }
+                    for (const asset of (_a = release.assets) !== null && _a !== void 0 ? _a : []) {
+                        const version = this.extractAssetVersion(asset.name, assetSuffix);
+                        if (version) {
+                            versions.set(version, {
+                                version,
+                                url: asset.browser_download_url
+                            });
+                        }
+                    }
+                }
+                releasesUrl = this.getNextReleasesUrl(response.headers);
+            }
+            return [...versions.values()];
+        });
+    }
+    // Returns the GraalVM JDK version encoded in a release asset name when it
+    // matches the requested platform/architecture/archive suffix, otherwise null.
+    extractAssetVersion(assetName, assetSuffix) {
+        if (!assetName.startsWith(GRAALVM_COMMUNITY_ASSET_PREFIX) ||
+            !assetName.endsWith(assetSuffix)) {
+            return null;
+        }
+        const rawVersion = assetName.slice(GRAALVM_COMMUNITY_ASSET_PREFIX.length, -assetSuffix.length);
+        if (!GRAALVM_COMMUNITY_VERSION_PATTERN.test(rawVersion)) {
+            return null;
+        }
+        return (0, util_1.convertVersionToSemver)(rawVersion);
+    }
+    getNextReleasesUrl(headers) {
+        const nextUrl = (0, util_1.getNextPageUrlFromLinkHeader)(headers);
+        if (nextUrl &&
+            !(0, util_1.validatePaginationUrl)(nextUrl, GRAALVM_COMMUNITY_RELEASES_PAGE_ORIGIN)) {
+            core.warning(`Ignoring pagination link with unexpected origin: ${nextUrl}`);
+            return null;
+        }
+        return nextUrl;
+    }
+}
+exports.GraalVMCommunityDistribution = GraalVMCommunityDistribution;


 /***/ }),
@@ -79794,21 +79923,38 @@ var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
 };
 Object.defineProperty(exports, "__esModule", ({ value: true }));
-exports.MicrosoftDistributions = void 0;
+exports.MicrosoftDistributions = exports.MICROSOFT_PUBLIC_KEY = void 0;
 const base_installer_1 = __nccwpck_require__(79935);
 const util_1 = __nccwpck_require__(54527);
+const gpg = __importStar(__nccwpck_require__(88343));
+const microsoft_key_1 = __nccwpck_require__(56286);
 const core = __importStar(__nccwpck_require__(37484));
 const tc = __importStar(__nccwpck_require__(33472));
 const fs_1 = __importDefault(__nccwpck_require__(79896));
 const path_1 = __importDefault(__nccwpck_require__(16928));
+var microsoft_key_2 = __nccwpck_require__(56286);
+Object.defineProperty(exports, "MICROSOFT_PUBLIC_KEY", ({ enumerable: true, get: function () { return microsoft_key_2.MICROSOFT_PUBLIC_KEY; } }));
 class MicrosoftDistributions extends base_installer_1.JavaBase {
    constructor(installerOptions) {
        super('Microsoft', installerOptions);
    }
    downloadTool(javaRelease) {
+        var _a;
        return __awaiter(this, void 0, void 0, function* () {
            core.info(`Downloading Java ${javaRelease.version} (${this.distribution}) from ${javaRelease.url} ...`);
            let javaArchivePath = yield tc.downloadTool(javaRelease.url);
+            if (this.verifySignature) {
+                if (!javaRelease.signatureUrl) {
+                    throw new Error(`Input 'verify-signature' is enabled, but no signature URL was found for Microsoft Build of OpenJDK version ${javaRelease.version}.`);
+                }
+                core.info(`Verifying Java package signature...`);
+                try {
+                    yield gpg.verifyPackageSignature(javaArchivePath, javaRelease.signatureUrl, (_a = this.verifySignaturePublicKey) !== null && _a !== void 0 ? _a : microsoft_key_1.MICROSOFT_PUBLIC_KEY);
+                }
+                catch (error) {
+                    throw new Error(`Failed to verify signature for Microsoft Build of OpenJDK version ${javaRelease.version}. Signature URL: ${javaRelease.signatureUrl}. Error: ${error.message}`);
+                }
+            }
            core.info(`Extracting Java archive...`);
            const extension = (0, util_1.getDownloadArchiveExtension)();
            if (process.platform === 'win32') {
@@ -79822,6 +79968,7 @@ class MicrosoftDistributions extends base_installer_1.JavaBase {
        });
    }
    findPackageForDownload(range) {
+        var _a;
        return __awaiter(this, void 0, void 0, function* () {
            const arch = this.distributionArchitecture();
            if (arch !== 'x64' && arch !== 'aarch64') {
@@ -79842,12 +79989,18 @@ class MicrosoftDistributions extends base_installer_1.JavaBase {
                const availableVersionStrings = manifest.map(item => item.version);
                throw this.createVersionNotFoundError(range, availableVersionStrings);
            }
+            const file = foundRelease.files[0];
+            const signatureUrl = (_a = file.signature_url) !== null && _a !== void 0 ? _a : `${file.download_url}.sig`;
            return {
-                url: foundRelease.files[0].download_url,
+                url: file.download_url,
+                signatureUrl,
                version: foundRelease.version
            };
        });
    }
+    supportsSignatureVerification() {
+        return true;
+    }
    getAvailableVersions() {
        return __awaiter(this, void 0, void 0, function* () {
            // TODO get these dynamically!
@@ -79890,6 +80043,38 @@ class MicrosoftDistributions extends base_installer_1.JavaBase {
 exports.MicrosoftDistributions = MicrosoftDistributions;


+/***/ }),
+
+/***/ 56286:
+/***/ ((__unused_webpack_module, exports) => {
+
+"use strict";
+
+Object.defineProperty(exports, "__esModule", ({ value: true }));
+exports.MICROSOFT_PUBLIC_KEY = void 0;
+// Microsoft Build of OpenJDK GPG signing key
+// Retrieved from: https://download.visualstudio.microsoft.com/download/pr/b90071e2-e0cf-4411-98be-dbeb09d67bf0/8622862bcd54206e158c5abca0582c9b/464279_464280_aoc_20210208.asc
+exports.MICROSOFT_PUBLIC_KEY = `-----BEGIN PGP PUBLIC KEY BLOCK-----
+Version: BSN Pgp v1.1.0.0
+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+=rHCS
+-----END PGP PUBLIC KEY BLOCK-----`;
+
+
 /***/ }),

 /***/ 11182:
@@ -80440,6 +80625,50 @@ class SemeruDistribution extends base_installer_1.JavaBase {
 exports.SemeruDistribution = SemeruDistribution;


+/***/ }),
+
+/***/ 80877:
+/***/ ((__unused_webpack_module, exports) => {
+
+"use strict";
+
+Object.defineProperty(exports, "__esModule", ({ value: true }));
+exports.ADOPTIUM_PUBLIC_KEY = void 0;
+// Adoptium GPG signing key (fingerprint: 3B04D753C9050D9A5D343F39843C48A565F8F04B)
+// Retrieved from: https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x3B04D753C9050D9A5D343F39843C48A565F8F04B
+exports.ADOPTIUM_PUBLIC_KEY = `-----BEGIN PGP PUBLIC KEY BLOCK-----
+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+=XLag
+-----END PGP PUBLIC KEY BLOCK-----`;
+
+
 /***/ }),

 /***/ 91986:
@@ -80483,14 +80712,18 @@ var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
 };
 Object.defineProperty(exports, "__esModule", ({ value: true }));
-exports.TemurinDistribution = exports.TemurinImplementation = void 0;
+exports.TemurinDistribution = exports.TemurinImplementation = exports.ADOPTIUM_PUBLIC_KEY = void 0;
 const core = __importStar(__nccwpck_require__(37484));
 const tc = __importStar(__nccwpck_require__(33472));
 const fs_1 = __importDefault(__nccwpck_require__(79896));
 const path_1 = __importDefault(__nccwpck_require__(16928));
 const semver_1 = __importDefault(__nccwpck_require__(62088));
+const gpg = __importStar(__nccwpck_require__(88343));
+const adoptium_key_1 = __nccwpck_require__(80877);
 const base_installer_1 = __nccwpck_require__(79935);
 const util_1 = __nccwpck_require__(54527);
+var adoptium_key_2 = __nccwpck_require__(80877);
+Object.defineProperty(exports, "ADOPTIUM_PUBLIC_KEY", ({ enumerable: true, get: function () { return adoptium_key_2.ADOPTIUM_PUBLIC_KEY; } }));
 var TemurinImplementation;
 (function (TemurinImplementation) {
    TemurinImplementation["Hotspot"] = "Hotspot";
@@ -80515,7 +80748,8 @@ class TemurinDistribution extends base_installer_1.JavaBase {
                    : item.version_data.semver.replace('-beta+', '+');
                return {
                    version: formattedVersion,
-                    url: item.binaries[0].package.link
+                    url: item.binaries[0].package.link,
+                    signatureUrl: item.binaries[0].package.signature_link
                };
            });
            const satisfiedVersions = availableVersionsWithBinaries
@@ -80532,9 +80766,22 @@ class TemurinDistribution extends base_installer_1.JavaBase {
        });
    }
    downloadTool(javaRelease) {
+        var _a;
        return __awaiter(this, void 0, void 0, function* () {
            core.info(`Downloading Java ${javaRelease.version} (${this.distribution}) from ${javaRelease.url} ...`);
            let javaArchivePath = yield tc.downloadTool(javaRelease.url);
+            if (this.verifySignature) {
+                if (!javaRelease.signatureUrl) {
+                    throw new Error(`Input 'verify-signature' is enabled, but no signature URL was found for Temurin version ${javaRelease.version}.`);
+                }
+                core.info(`Verifying Java package signature...`);
+                try {
+                    yield gpg.verifyPackageSignature(javaArchivePath, javaRelease.signatureUrl, (_a = this.verifySignaturePublicKey) !== null && _a !== void 0 ? _a : adoptium_key_1.ADOPTIUM_PUBLIC_KEY);
+                }
+                catch (error) {
+                    throw new Error(`Failed to verify signature for Temurin version ${javaRelease.version} from ${javaRelease.signatureUrl}: ${error.message}`);
+                }
+            }
            core.info(`Extracting Java archive...`);
            const extension = (0, util_1.getDownloadArchiveExtension)();
            if (process.platform === 'win32') {
@@ -80551,6 +80798,9 @@ class TemurinDistribution extends base_installer_1.JavaBase {
    get toolcacheFolderName() {
        return super.toolcacheFolderName;
    }
+    supportsSignatureVerification() {
+        return true;
+    }
    getAvailableVersions() {
        return __awaiter(this, void 0, void 0, function* () {
            const platform = this.getPlatformOption();
@@ -80843,14 +81093,27 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
    });
 };
 Object.defineProperty(exports, "__esModule", ({ value: true }));
-exports.deleteKey = exports.importKey = exports.PRIVATE_KEY_FILE = void 0;
+exports.verifyPackageSignature = exports.deleteKey = exports.importKey = exports.toGpgPath = exports.PRIVATE_KEY_FILE = void 0;
 const fs = __importStar(__nccwpck_require__(79896));
 const path = __importStar(__nccwpck_require__(16928));
 const io = __importStar(__nccwpck_require__(94994));
 const exec = __importStar(__nccwpck_require__(95236));
+const tc = __importStar(__nccwpck_require__(33472));
 const util = __importStar(__nccwpck_require__(54527));
 exports.PRIVATE_KEY_FILE = path.join(util.getTempDir(), 'private-key.asc');
 const PRIVATE_KEY_FINGERPRINT_REGEX = /\w{40}/;
+// Convert a Windows path (D:\a\_temp\...) to a POSIX path (/d/a/_temp/...).
+// The Git-bundled GPG on Windows (MSYS2-based) uses POSIX path conventions
+// internally. Passing Windows paths with backslashes can cause fatal GPG errors
+// (exit code 2), so all paths passed to GPG must be in POSIX format on Windows.
+function toGpgPath(p) {
+    if (process.platform !== 'win32')
+        return p;
+    return p
+        .replace(/\\/g, '/')
+        .replace(/^([A-Za-z]):\//, (_, drive) => `/${drive.toLowerCase()}/`);
+}
+exports.toGpgPath = toGpgPath;
 function importKey(privateKey) {
    return __awaiter(this, void 0, void 0, function* () {
        fs.writeFileSync(exports.PRIVATE_KEY_FILE, privateKey, {
@@ -80887,6 +81150,49 @@ function deleteKey(keyFingerprint) {
    });
 }
 exports.deleteKey = deleteKey;
+function verifyPackageSignature(archivePath, signatureUrl, publicKeyContent) {
+    return __awaiter(this, void 0, void 0, function* () {
+        const signaturePath = yield tc.downloadTool(signatureUrl);
+        let gpgHome;
+        try {
+            gpgHome = fs.mkdtempSync(path.join(util.getTempDir(), 'verify-signature-gpg-home-'));
+        }
+        catch (error) {
+            try {
+                yield io.rmRF(signaturePath);
+            }
+            catch (_a) {
+                // ignore cleanup failures
+            }
+            throw new Error(`Failed to create temporary GPG home directory for signature verification: ${error.message}`);
+        }
+        try {
+            const publicKeyFile = path.join(gpgHome, 'public-key.asc');
+            fs.writeFileSync(publicKeyFile, publicKeyContent, { encoding: 'utf-8' });
+            const options = { silent: true };
+            yield exec.exec('gpg', [
+                '--homedir',
+                toGpgPath(gpgHome),
+                '--batch',
+                '--import',
+                toGpgPath(publicKeyFile)
+            ], options);
+            yield exec.exec('gpg', [
+                '--homedir',
+                toGpgPath(gpgHome),
+                '--batch',
+                '--verify',
+                toGpgPath(signaturePath),
+                toGpgPath(archivePath)
+            ], options);
+        }
+        finally {
+            yield io.rmRF(signaturePath);
+            yield io.rmRF(gpgHome);
+        }
+    });
+}
+exports.verifyPackageSignature = verifyPackageSignature;


 /***/ }),
@@ -80955,6 +81261,8 @@ function run() {
            const cache = core.getInput(constants.INPUT_CACHE);
            const cacheDependencyPath = core.getInput(constants.INPUT_CACHE_DEPENDENCY_PATH);
            const checkLatest = (0, util_1.getBooleanInput)(constants.INPUT_CHECK_LATEST, false);
+            const verifySignature = (0, util_1.getBooleanInput)(constants.INPUT_VERIFY_SIGNATURE, false);
+            const verifySignaturePublicKey = core.getInput(constants.INPUT_VERIFY_SIGNATURE_PUBLIC_KEY) || undefined;
            let toolchainIds = core.getMultilineInput(constants.INPUT_MVN_TOOLCHAIN_ID);
            core.startGroup('Installed distributions');
            if (versions.length !== toolchainIds.length) {
@@ -80967,6 +81275,8 @@ function run() {
                architecture,
                packageType,
                checkLatest,
+                verifySignature,
+                verifySignaturePublicKey,
                distributionName,
                jdkFile,
                toolchainIds
@@ -81000,11 +81310,13 @@ function run() {
 run();
 function installVersion(version, options, toolchainId = 0) {
    return __awaiter(this, void 0, void 0, function* () {
-        const { distributionName, jdkFile, architecture, packageType, checkLatest, toolchainIds } = options;
+        const { distributionName, jdkFile, architecture, packageType, checkLatest, verifySignature, verifySignaturePublicKey, toolchainIds } = options;
        const installerOptions = {
            architecture,
            packageType,
            checkLatest,
+            verifySignature,
+            verifySignaturePublicKey,
            version
        };
        const distribution = (0, distribution_factory_1.getJavaDistribution)(distributionName, installerOptions, jdkFile);
@@ -10,6 +10,7 @@
  - [Alibaba Dragonwell](#Alibaba-Dragonwell)
  - [SapMachine](#SapMachine)
  - [GraalVM](#GraalVM)
+  - [GraalVM Community](#GraalVM-Community)
  - [JetBrains](#JetBrains)
 - [Installing custom Java package type](#Installing-custom-Java-package-type)
  - [JavaFX Maven project](#JavaFX-Maven-project)
@@ -22,6 +23,7 @@
 - [Hosted Tool Cache](#Hosted-Tool-Cache)
 - [Modifying Maven Toolchains](#Modifying-Maven-Toolchains)
 - [Java-version file](#Java-version-file)
+- [Self-signed certificates and internal CAs (GitHub Enterprise)](#Self-signed-certificates-and-internal-CAs-GitHub-Enterprise)

 See [action.yml](../action.yml) for more details on task inputs.

@@ -173,6 +175,21 @@ steps:
    native-image --version
 ```

+### GraalVM Community
+**NOTE:** GraalVM Community is available for stable JDK 17 and later releases.
+
+```yaml
+steps:
+- uses: actions/checkout@v6
+- uses: actions/setup-java@v5
+  with:
+    distribution: 'graalvm-community'
+    java-version: '21'
+- run: |
+    java --version
+    native-image --version
+```
+
 ### JetBrains

 **NOTE:** JetBrains is only available for LTS versions on 11 or later (11, 17, 21, etc.).
@@ -269,6 +286,9 @@ steps:
 ## Installing Java from local file
 If your use-case requires a custom distribution or a version that is not provided by setup-java, you can download it manually and setup-java will take care of the installation and caching on the VM:

+> [!NOTE]
+> This approach also lets you use builds that setup-java does not provide directly, such as **Early Access (EA)** or other unreleased JDK builds (for example, an upcoming feature release or a Loom/Valhalla preview build). Download the desired archive in a prior step and point `jdkFile` at it; setup-java will extract, install, and cache it just like a supported distribution. When targeting multiple architectures, select the correct binary per architecture in your workflow (for example, with a build matrix).
+
 ```yaml
 steps:
 - run: |
@@ -284,6 +304,23 @@ steps:
 - run: java --version
 ```

+For example, to use an **Early Access** build from [jdk.java.net](https://jdk.java.net/), download the archive for your runner OS/architecture and install it via `distribution: 'jdkfile'` (example below assumes Linux x64):
+
+```yaml
+steps:
+- run: |
+    download_url="https://download.java.net/java/early_access/jdk25/36/GPL/openjdk-25-ea+36_linux-x64_bin.tar.gz"
+    wget -O $RUNNER_TEMP/java_package.tar.gz $download_url
+- uses: actions/setup-java@v5
+  with:
+    distribution: 'jdkfile'
+    jdkFile: ${{ runner.temp }}/java_package.tar.gz
+    java-version: '25.0.0-ea.36'
+    architecture: x64
+
+- run: java --version
+```
+
 If your use-case requires a custom distribution (in the example, alpine-linux is used) or a version that is not provided by setup-java and you want to always install the latest version during runtime, then you can use the following code to auto-download the latest JDK, determine the semver needed for setup-java, and setup-java will take care of the installation and caching on the VM:

 ```yaml
@@ -660,3 +697,94 @@ If the file contains multiple versions, only the first one will be recognized.

 ***NOTE***:
 For the tool-version file, ensure that you use standard semantic versioning (semver) formats, as non-standard formats (such as jetbrains-21b212.1) may not be parsed correctly. Additionally, for complex version strings containing multiple version-like segments (for example, java semeru-openj9-11.0.15+10_openj9-0.32.0), the extraction logic may incorrectly capture the last segment (0.32.0) instead of the main version (11.0.15+10).
+
+## Self-signed certificates and internal CAs (GitHub Enterprise)
+
+When `setup-java` dynamically downloads a JDK, it makes HTTPS requests both to fetch the available version metadata and to download the JDK archive. If your runners sit behind a **TLS-inspecting corporate proxy**, or you are on **GitHub Enterprise Server (GHES)** with an internal certificate authority, those requests can fail with an error such as:
+
+```
+Error: self signed certificate in certificate chain
+```
+
+This happens because the certificate presented to the runner is signed by an **internal or self-signed CA** that is not part of the runner's default trust store. The download itself is fine — the runner simply cannot verify the certificate chain.
+
+### Recommended fix: trust your internal CA
+
+The secure way to resolve this is to make the runner trust your organization's CA, which keeps TLS verification fully enabled. `setup-java` runs on Node.js, which honors the [`NODE_EXTRA_CA_CERTS`](https://nodejs.org/api/cli.html#node_extra_ca_certsfile) environment variable. Point it at your CA bundle (in PEM format) **before** the `actions/setup-java` step:
+
+```yaml
+steps:
+  # The CA bundle is already present on the runner image in this example.
+  # Alternatively, write it from a secret in a previous step.
+  - name: Trust the internal CA
+    run: echo "NODE_EXTRA_CA_CERTS=/etc/ssl/certs/internal-ca.pem" >> "$GITHUB_ENV"
+
+  - uses: actions/setup-java@v5
+    with:
+      distribution: 'temurin'
+      java-version: '21'
+```
+
+If you keep the certificate in a secret rather than on the runner image, write it to disk first:
+
+```yaml
+steps:
+  - name: Write and trust the internal CA
+    run: |
+      echo "${{ secrets.INTERNAL_CA_PEM }}" > "${RUNNER_TEMP}/internal-ca.pem"
+      echo "NODE_EXTRA_CA_CERTS=${RUNNER_TEMP}/internal-ca.pem" >> "$GITHUB_ENV"
+
+  - uses: actions/setup-java@v5
+    with:
+      distribution: 'temurin'
+      java-version: '21'
+```
+
+For **self-hosted runners**, you can instead install your CA into the operating system's trust store (for example, `update-ca-certificates` on Debian/Ubuntu or `update-ca-trust` on RHEL). This makes the certificate trusted for all tooling on the runner, not just `setup-java`.
+
+### GitHub Enterprise customers
+
+On **GitHub Enterprise Server**, traffic from your runners frequently passes through an organization-managed proxy or terminates TLS at an appliance using a certificate from an internal CA. If your workflows hit the error above, set `NODE_EXTRA_CA_CERTS` to your enterprise CA bundle (or bake the CA into your self-hosted runner image) as shown above. Coordinate with your platform team to obtain the correct PEM bundle for your appliance and proxy chain.
+
+### Security warning: do not disable certificate verification
+
+Do **not** work around this error by disabling TLS verification (for example, by setting `NODE_TLS_REJECT_UNAUTHORIZED=0`). `setup-java` does not verify a pinned checksum or signature of the downloaded archive, so **TLS is effectively the only integrity guarantee** on the JDK download. Disabling verification would expose your workflow to a man-in-the-middle attacker who could serve a tampered JDK — which then becomes the `java` used by the rest of your pipeline, with access to your secrets and credentials. Always extend trust to your CA instead of turning verification off.
+
+### Trusting an internal CA inside the installed JDK
+
+The guidance above makes the **runner** trust your CA so that the JDK can be *downloaded*. That is a separate layer from making the **installed JDK** trust your CA at *application runtime*. If your build steps (Maven/Gradle dependency resolution, integration tests, HTTPS calls from your app, etc.) connect to internal services that present a certificate from your internal CA, the JDK will reject them with errors such as:
+
+```
+PKIX path building failed: unable to find valid certification path to requested target
+```
+
+The JDK keeps its own trust store — a keystore named `cacerts` under `$JAVA_HOME/lib/security/cacerts` — which is independent of the operating system and Node trust stores. After `setup-java` has run (so that `JAVA_HOME` points at the freshly installed JDK), import your CA into that keystore with `keytool`:
+
+```yaml
+steps:
+  - uses: actions/setup-java@v5
+    with:
+      distribution: 'temurin'
+      java-version: '21'
+
+  - name: Import internal CA into the JDK trust store
+    shell: bash
+    run: |
+      # Write the CA from a secret (or reference a file already on the runner)
+      echo "${{ secrets.INTERNAL_CA_PEM }}" > "${RUNNER_TEMP}/internal-ca.pem"
+      keytool -importcert -noprompt \
+        -alias internal-ca \
+        -file "${RUNNER_TEMP}/internal-ca.pem" \
+        -keystore "${JAVA_HOME}/lib/security/cacerts" \
+        -storepass changeit
+```
+
+Notes and caveats:
+
+- The default keystore password for `cacerts` is `changeit` unless your distribution overrides it.
+- On **hosted runners** the change applies only to the current job's JDK and is discarded when the job ends, so include the import step in every job that needs it.
+- On **self-hosted runners**, importing into a tool-cache JDK persists for as long as that cached version remains on the runner; if you want it to survive JDK reinstalls, pre-seed the CA into your runner image or re-run the import step each time.
+- Prefer giving the certificate a stable, descriptive `-alias` so re-runs are idempotent (re-importing the same alias will fail; add `keytool -delete -alias internal-ca ...` first if you re-run within a long-lived runner).
+
+This documents the post-install workflow; there is no dedicated action input for supplying a custom `cacerts` file.
+
@@ -63,6 +63,17 @@ Pull requests are the easiest way to contribute changes to git repos at GitHub.
 - To lint the code, **you need to run the `lint:fix` script**
 - To transpile source code to `javascript` we use [NCC](https://github.com/vercel/ncc). **It is very important to run the `build` script after making changes**, otherwise your changes will not get into the final `javascript` build

+> [!TIP]
+> Instead of running each script individually, you can run the aggregate scripts:
+>
+> - `npm run fix` — formats, lints (with autofix) and rebuilds the `dist/` bundle.
+> - `npm run check` — runs the same validation as CI: `format-check`, `lint`, `build` and `test`. **Run this before pushing a pull request** to make sure it will pass the required checks.
+>
+> Git hooks are installed automatically when you run `npm install` (via [husky](https://typicode.github.io/husky/)):
+>
+> - a **pre-commit** hook formats and lints staged files with [lint-staged](https://github.com/lint-staged/lint-staged);
+> - a **pre-push** hook rebuilds `dist/` and runs the test suite.
+
 **Learn more about how to implement tests:**

 Adding or changing tests is an integral part of making a change to the code. 
@@ -24,14 +24,16 @@
        "@types/node": "^26.0.0",
        "@types/semver": "^7.5.8",
        "@typescript-eslint/eslint-plugin": "^8.48.0",
-        "@typescript-eslint/parser": "^8.61.1",
+        "@typescript-eslint/parser": "^8.62.0",
        "@vercel/ncc": "^0.44.0",
        "eslint": "^8.57.0",
        "eslint-config-prettier": "^10.1.8",
        "eslint-plugin-jest": "^29.0.1",
        "eslint-plugin-node": "^11.1.0",
+        "husky": "^9.1.7",
        "jest": "^30.4.2",
        "jest-circus": "^30.4.2",
+        "lint-staged": "^17.0.8",
        "prettier": "^3.6.2",
        "ts-jest": "^29.4.11",
        "typescript": "^5.3.3"
@@ -2072,16 +2074,16 @@
      }
    },
    "node_modules/@typescript-eslint/parser": {
-      "version": "8.61.1",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/parser/-/parser-8.61.1.tgz",
-      "integrity": "sha512-PJ5vePq5/ognBbrIcoC5+SHO5dfpeLPzP9FpLkzWrguoYQEeeSjlJpVwOpo1JRSTEi7dRcwNy4h4dzV70PqHcg==",
+      "version": "8.62.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/parser/-/parser-8.62.0.tgz",
+      "integrity": "sha512-dzHeT2gySzZtLDsuqxU9AkYgIsQoHAHtRBpOqM+Ofzx1Bwrd2RcCjQJ+6iQbsHOIR6NS33bF2W1k3blN1zLDrA==",
      "dev": true,
      "license": "MIT",
      "dependencies": {
-        "@typescript-eslint/scope-manager": "8.61.1",
-        "@typescript-eslint/types": "8.61.1",
-        "@typescript-eslint/typescript-estree": "8.61.1",
-        "@typescript-eslint/visitor-keys": "8.61.1",
+        "@typescript-eslint/scope-manager": "8.62.0",
+        "@typescript-eslint/types": "8.62.0",
+        "@typescript-eslint/typescript-estree": "8.62.0",
+        "@typescript-eslint/visitor-keys": "8.62.0",
        "debug": "^4.4.3"
      },
      "engines": {
@@ -2097,14 +2099,14 @@
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    },
    "node_modules/@typescript-eslint/parser/node_modules/@typescript-eslint/project-service": {
-      "version": "8.61.1",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/project-service/-/project-service-8.61.1.tgz",
-      "integrity": "sha512-PrC4JYGmR241lYnfhmKGTXkFqv8+ymbTFgSAY0fVXpY82/QkMw5TZPl+vGzuDDU2QYJk9fIDOBTntF+yDv9LEA==",
+      "version": "8.62.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/project-service/-/project-service-8.62.0.tgz",
+      "integrity": "sha512-wexnCqiTg7BOGtbLDftYpRWlmLq4xfoMd7BKFR6Y75sZS3QmRKLdN3yWLhmIYgqMmP/OXWpj3H8odkb5nGURCQ==",
      "dev": true,
      "license": "MIT",
      "dependencies": {
-        "@typescript-eslint/tsconfig-utils": "^8.61.1",
-        "@typescript-eslint/types": "^8.61.1",
+        "@typescript-eslint/tsconfig-utils": "^8.62.0",
+        "@typescript-eslint/types": "^8.62.0",
        "debug": "^4.4.3"
      },
      "engines": {
@@ -2119,14 +2121,14 @@
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    },
    "node_modules/@typescript-eslint/parser/node_modules/@typescript-eslint/scope-manager": {
-      "version": "8.61.1",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/scope-manager/-/scope-manager-8.61.1.tgz",
-      "integrity": "sha512-L2bdIeoQS8FlKAvONAr20w6OcLXeB+qiDKbAooS9A0Ben+iSIkBef0FxqwKWYqt5sa0i4KJtxVyVmhMylKzF5w==",
+      "version": "8.62.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/scope-manager/-/scope-manager-8.62.0.tgz",
+      "integrity": "sha512-1lX38kNxXIRb8mEc3lbq5mdHq1Pf2+U0nFU65KfT18mtPxxl0fvjuEE92mHuXPuCtElJhOrddOpyMlM3Z0umEA==",
      "dev": true,
      "license": "MIT",
      "dependencies": {
-        "@typescript-eslint/types": "8.61.1",
-        "@typescript-eslint/visitor-keys": "8.61.1"
+        "@typescript-eslint/types": "8.62.0",
+        "@typescript-eslint/visitor-keys": "8.62.0"
      },
      "engines": {
        "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
@@ -2137,9 +2139,9 @@
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    },
    "node_modules/@typescript-eslint/parser/node_modules/@typescript-eslint/tsconfig-utils": {
-      "version": "8.61.1",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/tsconfig-utils/-/tsconfig-utils-8.61.1.tgz",
-      "integrity": "sha512-UN/H4di+OO7EWx2ovME+8t31YO+KVnK0RRKEHR3kOt21/Ay8BOq3M1OMvWs5vNiqcFCYGYoxK3MXPZzmMUE+yg==",
+      "version": "8.62.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/tsconfig-utils/-/tsconfig-utils-8.62.0.tgz",
+      "integrity": "sha512-y2GAdB6ykaXUvuspbYnizQc4oDDz0Tz/Yc7iWrXf9mx8vm/L/0vLHCe0tS2boG96Zy+DivnVDQ9ZUEWoHqqx1g==",
      "dev": true,
      "license": "MIT",
      "engines": {
@@ -2154,9 +2156,9 @@
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    },
    "node_modules/@typescript-eslint/parser/node_modules/@typescript-eslint/types": {
-      "version": "8.61.1",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/types/-/types-8.61.1.tgz",
-      "integrity": "sha512-G+CRlPqLv7Bz1IZVs03x5K59F1veqL0EJUROAdGhKsEq8qOiRiZbI+HUojPq5l0fEGOKModD9br6lObhB8zkoA==",
+      "version": "8.62.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/types/-/types-8.62.0.tgz",
+      "integrity": "sha512-KvAclkktORPvM54TgLgA4z9HIV1M8zOgw9ZVNXl9f/8dLYfXYX1wkMXP7qmabpijQRV5bHJLOmoyGQbLMaUYeg==",
      "dev": true,
      "license": "MIT",
      "engines": {
@@ -2168,16 +2170,16 @@
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    },
    "node_modules/@typescript-eslint/parser/node_modules/@typescript-eslint/typescript-estree": {
-      "version": "8.61.1",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-8.61.1.tgz",
-      "integrity": "sha512-u+oQD3BqYWPc8YV9Zab4vaJElJuwOLPRc10Jm1o/qS+6Qwen14HCWwx0Seo4LnSn2wxea2Ik8DxPt2/FHmuhrg==",
+      "version": "8.62.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-8.62.0.tgz",
+      "integrity": "sha512-+hVbNxtW64pIcZWDPGbyaKF7vp2IBTVY5ma1blwwksrjdsbdqqEKvJWMGbBofei4F6Dovx1M0RJgoFeNu2279A==",
      "dev": true,
      "license": "MIT",
      "dependencies": {
-        "@typescript-eslint/project-service": "8.61.1",
-        "@typescript-eslint/tsconfig-utils": "8.61.1",
-        "@typescript-eslint/types": "8.61.1",
-        "@typescript-eslint/visitor-keys": "8.61.1",
+        "@typescript-eslint/project-service": "8.62.0",
+        "@typescript-eslint/tsconfig-utils": "8.62.0",
+        "@typescript-eslint/types": "8.62.0",
+        "@typescript-eslint/visitor-keys": "8.62.0",
        "debug": "^4.4.3",
        "minimatch": "^10.2.2",
        "semver": "^7.7.3",
@@ -2196,13 +2198,13 @@
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    },
    "node_modules/@typescript-eslint/parser/node_modules/@typescript-eslint/visitor-keys": {
-      "version": "8.61.1",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/visitor-keys/-/visitor-keys-8.61.1.tgz",
-      "integrity": "sha512-6fJ9MHWtK14C1DSkiMlHUSOmrVebL7150xZJBlJiL62jjhIA4JmOq6flwBgDxIdBKKdoiZRel+dfPD5MLfny3w==",
+      "version": "8.62.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/visitor-keys/-/visitor-keys-8.62.0.tgz",
+      "integrity": "sha512-CY3uyFSRbcQv3nnSv8S0+lDftMVz6P963PoRlxrV7ew/Md564g9ut60PYzdLM5qW4jFn93GBF+Soi90ISAN+GQ==",
      "dev": true,
      "license": "MIT",
      "dependencies": {
-        "@typescript-eslint/types": "8.61.1",
+        "@typescript-eslint/types": "8.62.0",
        "eslint-visitor-keys": "^5.0.0"
      },
      "engines": {
@@ -3222,6 +3224,85 @@
      "dev": true,
      "license": "MIT"
    },
+    "node_modules/cli-cursor": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/cli-cursor/-/cli-cursor-5.0.0.tgz",
+      "integrity": "sha512-aCj4O5wKyszjMmDT4tZj93kxyydN/K5zPWSCe6/0AV/AA1pqe5ZBIw0a2ZfPQV7lL5/yb5HsUreJ6UFAF1tEQw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "restore-cursor": "^5.0.0"
+      },
+      "engines": {
+        "node": ">=18"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
+    "node_modules/cli-truncate": {
+      "version": "5.2.0",
+      "resolved": "https://registry.npmjs.org/cli-truncate/-/cli-truncate-5.2.0.tgz",
+      "integrity": "sha512-xRwvIOMGrfOAnM1JYtqQImuaNtDEv9v6oIYAs4LIHwTiKee8uwvIi363igssOC0O5U04i4AlENs79LQLu9tEMw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "slice-ansi": "^8.0.0",
+        "string-width": "^8.2.0"
+      },
+      "engines": {
+        "node": ">=20"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
+    "node_modules/cli-truncate/node_modules/ansi-regex": {
+      "version": "6.2.2",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-6.2.2.tgz",
+      "integrity": "sha512-Bq3SmSpyFHaWjPk8If9yc6svM8c56dB5BAtW4Qbw5jHTwwXXcTLoRMkpDJp6VL0XzlWaCHTXrkFURMYmD0sLqg==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://github.com/chalk/ansi-regex?sponsor=1"
+      }
+    },
+    "node_modules/cli-truncate/node_modules/string-width": {
+      "version": "8.2.1",
+      "resolved": "https://registry.npmjs.org/string-width/-/string-width-8.2.1.tgz",
+      "integrity": "sha512-IIaP0g3iy9Cyy18w3M9YcaDudujEAVHKt3a3QJg1+sr/oX96TbaGUubG0hJyCjCBThFH+tFpcIyoUHUn1ogaLA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "get-east-asian-width": "^1.5.0",
+        "strip-ansi": "^7.1.2"
+      },
+      "engines": {
+        "node": ">=20"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
+    "node_modules/cli-truncate/node_modules/strip-ansi": {
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-7.2.0.tgz",
+      "integrity": "sha512-yDPMNjp4WyfYBkHnjIRLfca1i6KMyGCtsVgoKe/z1+6vukgaENdgGBZt+ZmKPc4gavvEZ5OgHfHdrazhgNyG7w==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "ansi-regex": "^6.2.2"
+      },
+      "engines": {
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://github.com/chalk/strip-ansi?sponsor=1"
+      }
+    },
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+    "node_modules/slice-ansi/node_modules/ansi-styles": {
+      "version": "6.2.3",
+      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-6.2.3.tgz",
+      "integrity": "sha512-4Dj6M28JB+oAH8kFkTLUo+a2jwOFkuqb3yucU0CANcRRUbxS0cP0nZYCGjcc3BNXwRIsUVmDGgzawme7zvJHvg==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://github.com/chalk/ansi-styles?sponsor=1"
+      }
+    },
+    "node_modules/slice-ansi/node_modules/is-fullwidth-code-point": {
+      "version": "5.1.0",
+      "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-5.1.0.tgz",
+      "integrity": "sha512-5XHYaSyiqADb4RnZ1Bdad6cPp8Toise4TzEjcOYDHZkTCbKgiUl7WTUCpNWHuxmDt91wnsZBc9xinNzopv3JMQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "get-east-asian-width": "^1.3.1"
+      },
+      "engines": {
+        "node": ">=18"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
    "node_modules/source-map": {
      "version": "0.6.1",
      "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
@@ -6032,6 +6560,16 @@
        "node": ">=8"
      }
    },
+    "node_modules/string-argv": {
+      "version": "0.3.2",
+      "resolved": "https://registry.npmjs.org/string-argv/-/string-argv-0.3.2.tgz",
+      "integrity": "sha512-aqD2Q0144Z+/RqG52NeHEkZauTAUWJO8c6yTftGJKO3Tja5tUgIfmIl6kExvhtxSDP7fXB6DvzkfMpCd/F3G+Q==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.6.19"
+      }
+    },
    "node_modules/string-length": {
      "version": "4.0.2",
      "resolved": "https://registry.npmjs.org/string-length/-/string-length-4.0.2.tgz",
@@ -6211,6 +6749,16 @@
      "integrity": "sha512-N+8UisAXDGk8PFXP4HAzVR9nbfmVJ3zYLAWiTIoqC5v5isinhr+r5uaO8+7r3BMfuNIufIsA7RdpVgacC2cSpw==",
      "dev": true
    },
+    "node_modules/tinyexec": {
+      "version": "1.2.4",
+      "resolved": "https://registry.npmjs.org/tinyexec/-/tinyexec-1.2.4.tgz",
+      "integrity": "sha512-SHf/r48b7vOrjve9PxJo3MN5v5yuyjHvdUcrQffT3WXMUfnGmHDVbC4k3sHJaJTgZCwpUplIaAo5ANtMyp3YHg==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      }
+    },
    "node_modules/tinyglobby": {
      "version": "0.2.15",
      "resolved": "https://registry.npmjs.org/tinyglobby/-/tinyglobby-0.2.15.tgz",
@@ -6675,6 +7223,23 @@
      "dev": true,
      "license": "ISC"
    },
+    "node_modules/yaml": {
+      "version": "2.9.0",
+      "resolved": "https://registry.npmjs.org/yaml/-/yaml-2.9.0.tgz",
+      "integrity": "sha512-2AvhNX3mb8zd6Zy7INTtSpl1F15HW6Wnqj0srWlkKLcpYl/gMIMJiyuGq2KeI2YFxUPjdlB+3Lc10seMLtL4cA==",
+      "dev": true,
+      "license": "ISC",
+      "optional": true,
+      "bin": {
+        "yaml": "bin.mjs"
+      },
+      "engines": {
+        "node": ">= 14.6"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/eemeli"
+      }
+    },
    "node_modules/yargs": {
      "version": "17.7.2",
      "resolved": "https://registry.npmjs.org/yargs/-/yargs-17.7.2.tgz",
@@ -13,10 +13,22 @@
    "format-check": "prettier --no-error-on-unmatched-pattern --config ./.prettierrc.js --check \"**/*.{ts,yml,yaml}\"",
    "lint": "eslint --config ./.eslintrc.js \"**/*.ts\"",
    "lint:fix": "eslint --config ./.eslintrc.js \"**/*.ts\" --fix",
+    "check": "npm run format-check && npm run lint && npm run build && npm test",
+    "fix": "npm run format && npm run lint:fix && npm run build",
+    "prepare": "husky install",
    "prerelease": "npm run-script build",
    "release": "git add -f dist/setup/index.js dist/cleanup/index.js",
    "test": "jest"
  },
+  "lint-staged": {
+    "*.ts": [
+      "prettier --no-error-on-unmatched-pattern --config ./.prettierrc.js --write",
+      "eslint --config ./.eslintrc.js --fix"
+    ],
+    "*.{yml,yaml}": [
+      "prettier --no-error-on-unmatched-pattern --config ./.prettierrc.js --write"
+    ]
+  },
  "repository": {
    "type": "git",
    "url": "git+https://github.com/actions/setup-java.git"
@@ -44,14 +56,16 @@
    "@types/node": "^26.0.0",
    "@types/semver": "^7.5.8",
    "@typescript-eslint/eslint-plugin": "^8.48.0",
-    "@typescript-eslint/parser": "^8.61.1",
+    "@typescript-eslint/parser": "^8.62.0",
    "@vercel/ncc": "^0.44.0",
    "eslint": "^8.57.0",
    "eslint-config-prettier": "^10.1.8",
    "eslint-plugin-jest": "^29.0.1",
    "eslint-plugin-node": "^11.1.0",
+    "husky": "^9.1.7",
    "jest": "^30.4.2",
    "jest-circus": "^30.4.2",
+    "lint-staged": "^17.0.8",
    "prettier": "^3.6.2",
    "ts-jest": "^29.4.11",
    "typescript": "^5.3.3"
@@ -6,6 +6,8 @@ export const INPUT_JAVA_PACKAGE = 'java-package';
 export const INPUT_DISTRIBUTION = 'distribution';
 export const INPUT_JDK_FILE = 'jdkFile';
 export const INPUT_CHECK_LATEST = 'check-latest';
+export const INPUT_VERIFY_SIGNATURE = 'verify-signature';
+export const INPUT_VERIFY_SIGNATURE_PUBLIC_KEY = 'verify-signature-public-key';
 export const INPUT_SERVER_ID = 'server-id';
 export const INPUT_SERVER_USERNAME = 'server-username';
 export const INPUT_SERVER_PASSWORD = 'server-password';
@@ -20,6 +20,8 @@ export abstract class JavaBase {
  protected packageType: string;
  protected stable: boolean;
  protected checkLatest: boolean;
+  protected verifySignature: boolean;
+  protected verifySignaturePublicKey: string | undefined;

  constructor(
    protected distribution: string,
@@ -36,6 +38,8 @@ export abstract class JavaBase {
    this.architecture = installerOptions.architecture || os.arch();
    this.packageType = installerOptions.packageType;
    this.checkLatest = installerOptions.checkLatest;
+    this.verifySignature = installerOptions.verifySignature ?? false;
+    this.verifySignaturePublicKey = installerOptions.verifySignaturePublicKey;
  }

  protected abstract downloadTool(
@@ -46,6 +50,12 @@ export abstract class JavaBase {
  ): Promise<JavaDownloadRelease>;

  public async setupJava(): Promise<JavaInstallerResults> {
+    if (this.verifySignature && !this.supportsSignatureVerification()) {
+      throw new Error(
+        `Input 'verify-signature' is not supported for distribution '${this.distribution}'.`
+      );
+    }
+
    let foundJava = this.findInToolcache();
    if (foundJava && !this.checkLatest) {
      core.info(`Resolved Java ${foundJava.version} from tool-cache`);
@@ -179,6 +189,10 @@ export abstract class JavaBase {
    return `Java_${this.distribution}_${this.packageType}`;
  }

+  protected supportsSignatureVerification(): boolean {
+    return false;
+  }
+
  protected getToolcacheVersionName(version: string): string {
    if (!this.stable) {
      if (version.includes('+')) {
@@ -3,6 +3,8 @@ export interface JavaInstallerOptions {
  architecture: string;
  packageType: string;
  checkLatest: boolean;
+  verifySignature?: boolean;
+  verifySignaturePublicKey?: string;
 }

 export interface JavaInstallerResults {
@@ -13,4 +15,5 @@ export interface JavaInstallerResults {
 export interface JavaDownloadRelease {
  version: string;
  url: string;
+  signatureUrl?: string;
 }
@@ -11,7 +11,10 @@ import {CorrettoDistribution} from './corretto/installer';
 import {OracleDistribution} from './oracle/installer';
 import {DragonwellDistribution} from './dragonwell/installer';
 import {SapMachineDistribution} from './sapmachine/installer';
-import {GraalVMDistribution} from './graalvm/installer';
+import {
+  GraalVMCommunityDistribution,
+  GraalVMDistribution
+} from './graalvm/installer';
 import {JetBrainsDistribution} from './jetbrains/installer';

 enum JavaDistribution {
@@ -29,6 +32,7 @@ enum JavaDistribution {
  Dragonwell = 'dragonwell',
  SapMachine = 'sapmachine',
  GraalVM = 'graalvm',
+  GraalVMCommunity = 'graalvm-community',
  JetBrains = 'jetbrains'
 }

@@ -74,6 +78,8 @@ export function getJavaDistribution(
      return new SapMachineDistribution(installerOptions);
    case JavaDistribution.GraalVM:
      return new GraalVMDistribution(installerOptions);
+    case JavaDistribution.GraalVMCommunity:
+      return new GraalVMCommunityDistribution(installerOptions);
    case JavaDistribution.JetBrains:
      return new JetBrainsDistribution(installerOptions);
    default:
@@ -2,6 +2,7 @@ import * as core from '@actions/core';
 import * as tc from '@actions/tool-cache';
 import fs from 'fs';
 import path from 'path';
+import semver from 'semver';
 import {JavaBase} from '../base-installer';
 import {HttpCodes} from '@actions/http-client';
 import {GraalVMEAVersion} from './models';
@@ -11,14 +12,26 @@ import {
  JavaInstallerResults
 } from '../base-models';
 import {
+  convertVersionToSemver,
  extractJdkFile,
  getDownloadArchiveExtension,
  getGitHubHttpHeaders,
-  renameWinArchive
+  getNextPageUrlFromLinkHeader,
+  isVersionSatisfies,
+  MAX_PAGINATION_PAGES,
+  renameWinArchive,
+  validatePaginationUrl
 } from '../../util';

 const GRAALVM_DL_BASE = 'https://download.oracle.com/graalvm';
 const GRAALVM_DOWNLOAD_URL = 'https://www.graalvm.org/downloads/';
+const GRAALVM_COMMUNITY_RELEASES_URL =
+  'https://api.github.com/repos/graalvm/graalvm-ce-builds/releases?per_page=100';
+const GRAALVM_COMMUNITY_RELEASES_PAGE_ORIGIN = 'https://api.github.com';
+const GRAALVM_COMMUNITY_DOWNLOAD_URL =
+  'https://github.com/graalvm/graalvm-ce-builds/releases';
+const GRAALVM_COMMUNITY_ASSET_PREFIX = 'graalvm-community-jdk-';
+const GRAALVM_COMMUNITY_VERSION_PATTERN = /^\d+(?:\.\d+)*$/;
 const IS_WINDOWS = process.platform === 'win32';
 const GRAALVM_PLATFORM = IS_WINDOWS ? 'windows' : process.platform;
 const GRAALVM_MIN_VERSION = 17;
@@ -26,9 +39,23 @@ const SUPPORTED_ARCHITECTURES = ['x64', 'aarch64'] as const;
 type SupportedArchitecture = (typeof SUPPORTED_ARCHITECTURES)[number];
 type OsVersions = 'linux' | 'macos' | 'windows';

+interface GraalVMCommunityAsset {
+  name: string;
+  browser_download_url: string;
+}
+
+interface GraalVMCommunityRelease {
+  draft: boolean;
+  prerelease: boolean;
+  assets: GraalVMCommunityAsset[];
+}
+
 export class GraalVMDistribution extends JavaBase {
-  constructor(installerOptions: JavaInstallerOptions) {
-    super('GraalVM', installerOptions);
+  constructor(
+    installerOptions: JavaInstallerOptions,
+    distributionName = 'GraalVM'
+  ) {
+    super(distributionName, installerOptions);
  }

  protected async downloadTool(
@@ -85,40 +112,14 @@ export class GraalVMDistribution extends JavaBase {
  protected async findPackageForDownload(
    range: string
  ): Promise<JavaDownloadRelease> {
-    // Add input validation
-    if (!range || typeof range !== 'string') {
-      throw new Error('Version range is required and must be a string');
-    }
-
-    const arch = this.distributionArchitecture();
-    if (!SUPPORTED_ARCHITECTURES.includes(arch as SupportedArchitecture)) {
-      throw new Error(
-        `Unsupported architecture: ${this.architecture}. Supported architectures are: ${SUPPORTED_ARCHITECTURES.join(', ')}`
-      );
-    }
+    this.validateVersionRange(range);
+    const arch = this.getSupportedArchitecture();

    if (!this.stable) {
      return this.findEABuildDownloadUrl(`${range}-ea`);
    }

-    if (this.packageType !== 'jdk') {
-      throw new Error('GraalVM provides only the `jdk` package type');
-    }
-
-    const platform = this.getPlatform();
-    const extension = getDownloadArchiveExtension();
-    const major = range.includes('.') ? range.split('.')[0] : range;
-    const majorVersion = parseInt(major);
-
-    if (isNaN(majorVersion)) {
-      throw new Error(`Invalid version format: ${range}`);
-    }
-
-    if (majorVersion < GRAALVM_MIN_VERSION) {
-      throw new Error(
-        `GraalVM is only supported for JDK ${GRAALVM_MIN_VERSION} and later. Requested version: ${major}`
-      );
-    }
+    const {platform, extension, major} = this.validateStableBuildRequest(range);

    const fileUrl = this.constructFileUrl(
      range,
@@ -134,6 +135,56 @@ export class GraalVMDistribution extends JavaBase {
    return {url: fileUrl, version: range};
  }

+  protected validateVersionRange(range: string): void {
+    if (!range || typeof range !== 'string') {
+      throw new Error('Version range is required and must be a string');
+    }
+  }
+
+  protected getSupportedArchitecture(): SupportedArchitecture {
+    const arch = this.distributionArchitecture();
+    if (!SUPPORTED_ARCHITECTURES.includes(arch as SupportedArchitecture)) {
+      throw new Error(
+        `Unsupported architecture: ${this.architecture}. Supported architectures are: ${SUPPORTED_ARCHITECTURES.join(', ')}`
+      );
+    }
+
+    return arch as SupportedArchitecture;
+  }
+
+  protected validateStableBuildRequest(range: string): {
+    platform: OsVersions;
+    extension: string;
+    major: string;
+  } {
+    if (this.packageType !== 'jdk') {
+      throw new Error(
+        `${this.distribution} provides only the \`jdk\` package type`
+      );
+    }
+
+    const platform = this.getPlatform();
+    const extension = getDownloadArchiveExtension();
+    const major = range.includes('.') ? range.split('.')[0] : range;
+    const majorVersion = parseInt(major);
+
+    if (isNaN(majorVersion)) {
+      throw new Error(`Invalid version format: ${range}`);
+    }
+
+    if (majorVersion < GRAALVM_MIN_VERSION) {
+      throw new Error(
+        `${this.distribution} is only supported for JDK ${GRAALVM_MIN_VERSION} and later. Requested version: ${major}`
+      );
+    }
+
+    return {
+      platform,
+      major,
+      extension
+    };
+  }
+
  private constructFileUrl(
    range: string,
    major: string,
@@ -280,3 +331,144 @@ export class GraalVMDistribution extends JavaBase {
    return result;
  }
 }
+
+export class GraalVMCommunityDistribution extends GraalVMDistribution {
+  constructor(installerOptions: JavaInstallerOptions) {
+    super(installerOptions, 'GraalVM Community');
+  }
+
+  protected get toolcacheFolderName(): string {
+    return `Java_GraalVM_Community_${this.packageType}`;
+  }
+
+  protected async findPackageForDownload(
+    range: string
+  ): Promise<JavaDownloadRelease> {
+    this.validateVersionRange(range);
+
+    if (!this.stable) {
+      throw new Error('GraalVM Community does not provide early access builds');
+    }
+
+    const arch = this.getSupportedArchitecture();
+    const {platform, extension} = this.validateStableBuildRequest(range);
+    // GraalVM Community asset names embed the platform, architecture and
+    // archive type, e.g. `graalvm-community-jdk-21.0.2_linux-x64_bin.tar.gz`.
+    const assetSuffix = `_${platform}-${arch}_bin.${extension}`;
+    const availableVersions = await this.getAvailableVersions(assetSuffix);
+
+    const satisfiedVersion = availableVersions
+      .filter(item => isVersionSatisfies(range, item.version))
+      .sort((a, b) => -semver.compareBuild(a.version, b.version))[0];
+
+    if (!satisfiedVersion) {
+      const error = this.createVersionNotFoundError(
+        range,
+        availableVersions.map(item => item.version),
+        `Platform: ${platform}`
+      );
+      error.message += `\nPlease check if this version is available at ${GRAALVM_COMMUNITY_DOWNLOAD_URL}.`;
+      throw error;
+    }
+
+    return satisfiedVersion;
+  }
+
+  private async getAvailableVersions(
+    assetSuffix: string
+  ): Promise<JavaDownloadRelease[]> {
+    const headers = getGitHubHttpHeaders();
+    const versions = new Map<string, JavaDownloadRelease>();
+    let releasesUrl: string | null = GRAALVM_COMMUNITY_RELEASES_URL;
+
+    for (
+      let pageIndex = 0;
+      releasesUrl && pageIndex < MAX_PAGINATION_PAGES;
+      pageIndex++
+    ) {
+      const response = await this.http.getJson<GraalVMCommunityRelease[]>(
+        releasesUrl,
+        headers
+      );
+
+      // A successful GitHub releases listing is always a JSON array (possibly
+      // empty). Anything else indicates an unexpected/error payload (rate
+      // limiting, auth failure, etc.) that must be surfaced instead of being
+      // silently treated as "no releases", which would later look like a
+      // misleading "version not found" error.
+      if (!Array.isArray(response.result)) {
+        throw new Error(
+          `Unexpected response while listing GraalVM Community releases from ${releasesUrl} ` +
+            `(HTTP status code: ${response.statusCode}). Expected a JSON array of releases. ` +
+            `Please check if the service is available at ${GRAALVM_COMMUNITY_DOWNLOAD_URL}.`
+        );
+      }
+
+      const releases = response.result;
+      if (releases.length === 0) {
+        break;
+      }
+
+      for (const release of releases) {
+        if (release.draft || release.prerelease) {
+          continue;
+        }
+
+        for (const asset of release.assets ?? []) {
+          const version = this.extractAssetVersion(asset.name, assetSuffix);
+          if (version) {
+            versions.set(version, {
+              version,
+              url: asset.browser_download_url
+            });
+          }
+        }
+      }
+
+      releasesUrl = this.getNextReleasesUrl(response.headers);
+    }
+
+    return [...versions.values()];
+  }
+
+  // Returns the GraalVM JDK version encoded in a release asset name when it
+  // matches the requested platform/architecture/archive suffix, otherwise null.
+  private extractAssetVersion(
+    assetName: string,
+    assetSuffix: string
+  ): string | null {
+    if (
+      !assetName.startsWith(GRAALVM_COMMUNITY_ASSET_PREFIX) ||
+      !assetName.endsWith(assetSuffix)
+    ) {
+      return null;
+    }
+
+    const rawVersion = assetName.slice(
+      GRAALVM_COMMUNITY_ASSET_PREFIX.length,
+      -assetSuffix.length
+    );
+
+    if (!GRAALVM_COMMUNITY_VERSION_PATTERN.test(rawVersion)) {
+      return null;
+    }
+
+    return convertVersionToSemver(rawVersion);
+  }
+
+  private getNextReleasesUrl(
+    headers: Record<string, string | string[] | undefined>
+  ): string | null {
+    const nextUrl = getNextPageUrlFromLinkHeader(headers);
+    if (
+      nextUrl &&
+      !validatePaginationUrl(nextUrl, GRAALVM_COMMUNITY_RELEASES_PAGE_ORIGIN)
+    ) {
+      core.warning(
+        `Ignoring pagination link with unexpected origin: ${nextUrl}`
+      );
+      return null;
+    }
+    return nextUrl;
+  }
+}
@@ -10,12 +10,16 @@ import {
  getGitHubHttpHeaders,
  renameWinArchive
 } from '../../util';
+import * as gpg from '../../gpg';
+import {MICROSOFT_PUBLIC_KEY} from './microsoft-key';
 import * as core from '@actions/core';
 import * as tc from '@actions/tool-cache';
 import fs from 'fs';
 import path from 'path';
 import {TypedResponse} from '@actions/http-client/lib/interfaces';

+export {MICROSOFT_PUBLIC_KEY} from './microsoft-key';
+
 export class MicrosoftDistributions extends JavaBase {
  constructor(installerOptions: JavaInstallerOptions) {
    super('Microsoft', installerOptions);
@@ -29,6 +33,26 @@ export class MicrosoftDistributions extends JavaBase {
    );
    let javaArchivePath = await tc.downloadTool(javaRelease.url);

+    if (this.verifySignature) {
+      if (!javaRelease.signatureUrl) {
+        throw new Error(
+          `Input 'verify-signature' is enabled, but no signature URL was found for Microsoft Build of OpenJDK version ${javaRelease.version}.`
+        );
+      }
+      core.info(`Verifying Java package signature...`);
+      try {
+        await gpg.verifyPackageSignature(
+          javaArchivePath,
+          javaRelease.signatureUrl,
+          this.verifySignaturePublicKey ?? MICROSOFT_PUBLIC_KEY
+        );
+      } catch (error) {
+        throw new Error(
+          `Failed to verify signature for Microsoft Build of OpenJDK version ${javaRelease.version}. Signature URL: ${javaRelease.signatureUrl}. Error: ${(error as Error).message}`
+        );
+      }
+    }
+
    core.info(`Extracting Java archive...`);
    const extension = getDownloadArchiveExtension();
    if (process.platform === 'win32') {
@@ -80,12 +104,23 @@ export class MicrosoftDistributions extends JavaBase {
      throw this.createVersionNotFoundError(range, availableVersionStrings);
    }

+    const file = foundRelease.files[0] as {
+      download_url: string;
+      signature_url?: string;
+    };
+    const signatureUrl = file.signature_url ?? `${file.download_url}.sig`;
+
    return {
-      url: foundRelease.files[0].download_url,
+      url: file.download_url,
+      signatureUrl,
      version: foundRelease.version
    };
  }

+  protected supportsSignatureVerification(): boolean {
+    return true;
+  }
+
  private async getAvailableVersions(): Promise<tc.IToolRelease[] | null> {
    // TODO get these dynamically!
    // We will need Microsoft to add an endpoint where we can query for versions.
@@ -0,0 +1,21 @@
+// Microsoft Build of OpenJDK GPG signing key
+// Retrieved from: https://download.visualstudio.microsoft.com/download/pr/b90071e2-e0cf-4411-98be-dbeb09d67bf0/8622862bcd54206e158c5abca0582c9b/464279_464280_aoc_20210208.asc
+export const MICROSOFT_PUBLIC_KEY = `-----BEGIN PGP PUBLIC KEY BLOCK-----
+Version: BSN Pgp v1.1.0.0
+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+=rHCS
+-----END PGP PUBLIC KEY BLOCK-----`;
@@ -0,0 +1,33 @@
+// Adoptium GPG signing key (fingerprint: 3B04D753C9050D9A5D343F39843C48A565F8F04B)
+// Retrieved from: https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x3B04D753C9050D9A5D343F39843C48A565F8F04B
+export const ADOPTIUM_PUBLIC_KEY = `-----BEGIN PGP PUBLIC KEY BLOCK-----
+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+=XLag
+-----END PGP PUBLIC KEY BLOCK-----`;
@@ -4,7 +4,9 @@ import * as tc from '@actions/tool-cache';
 import fs from 'fs';
 import path from 'path';
 import semver from 'semver';
+import * as gpg from '../../gpg';

+import {ADOPTIUM_PUBLIC_KEY} from './adoptium-key';
 import {JavaBase} from '../base-installer';
 import {ITemurinAvailableVersions} from './models';
 import {
@@ -22,6 +24,8 @@ import {
  validatePaginationUrl
 } from '../../util';

+export {ADOPTIUM_PUBLIC_KEY} from './adoptium-key';
+
 export enum TemurinImplementation {
  Hotspot = 'Hotspot'
 }
@@ -50,7 +54,8 @@ export class TemurinDistribution extends JavaBase {
          : item.version_data.semver.replace('-beta+', '+');
        return {
          version: formattedVersion,
-          url: item.binaries[0].package.link
+          url: item.binaries[0].package.link,
+          signatureUrl: item.binaries[0].package.signature_link
        } as JavaDownloadRelease;
      });

@@ -80,6 +85,28 @@ export class TemurinDistribution extends JavaBase {
    );
    let javaArchivePath = await tc.downloadTool(javaRelease.url);

+    if (this.verifySignature) {
+      if (!javaRelease.signatureUrl) {
+        throw new Error(
+          `Input 'verify-signature' is enabled, but no signature URL was found for Temurin version ${javaRelease.version}.`
+        );
+      }
+      core.info(`Verifying Java package signature...`);
+      try {
+        await gpg.verifyPackageSignature(
+          javaArchivePath,
+          javaRelease.signatureUrl,
+          this.verifySignaturePublicKey ?? ADOPTIUM_PUBLIC_KEY
+        );
+      } catch (error) {
+        throw new Error(
+          `Failed to verify signature for Temurin version ${javaRelease.version} from ${javaRelease.signatureUrl}: ${
+            (error as Error).message
+          }`
+        );
+      }
+    }
+
    core.info(`Extracting Java archive...`);
    const extension = getDownloadArchiveExtension();
    if (process.platform === 'win32') {
@@ -105,6 +132,10 @@ export class TemurinDistribution extends JavaBase {
    return super.toolcacheFolderName;
  }

+  protected supportsSignatureVerification(): boolean {
+    return true;
+  }
+
  private async getAvailableVersions(): Promise<ITemurinAvailableVersions[]> {
    const platform = this.getPlatformOption();
    const arch = this.distributionArchitecture();
@@ -11,6 +11,7 @@ export interface ITemurinAvailableVersions {
      package: {
        checksum: string;
        checksum_link: string;
+        signature_link?: string;
        download_count: number;
        link: string;
        metadata_link: string;
@@ -2,6 +2,7 @@ import * as fs from 'fs';
 import * as path from 'path';
 import * as io from '@actions/io';
 import * as exec from '@actions/exec';
+import * as tc from '@actions/tool-cache';
 import * as util from './util';
 import {ExecOptions} from '@actions/exec/lib/interfaces';

@@ -9,6 +10,17 @@ export const PRIVATE_KEY_FILE = path.join(util.getTempDir(), 'private-key.asc');

 const PRIVATE_KEY_FINGERPRINT_REGEX = /\w{40}/;

+// Convert a Windows path (D:\a\_temp\...) to a POSIX path (/d/a/_temp/...).
+// The Git-bundled GPG on Windows (MSYS2-based) uses POSIX path conventions
+// internally. Passing Windows paths with backslashes can cause fatal GPG errors
+// (exit code 2), so all paths passed to GPG must be in POSIX format on Windows.
+export function toGpgPath(p: string): string {
+  if (process.platform !== 'win32') return p;
+  return p
+    .replace(/\\/g, '/')
+    .replace(/^([A-Za-z]):\//, (_, drive) => `/${drive.toLowerCase()}/`);
+}
+
 export async function importKey(privateKey: string) {
  fs.writeFileSync(PRIVATE_KEY_FILE, privateKey, {
    encoding: 'utf-8',
@@ -53,3 +65,59 @@ export async function deleteKey(keyFingerprint: string) {
    }
  );
 }
+
+export async function verifyPackageSignature(
+  archivePath: string,
+  signatureUrl: string,
+  publicKeyContent: string
+) {
+  const signaturePath = await tc.downloadTool(signatureUrl);
+  let gpgHome: string;
+  try {
+    gpgHome = fs.mkdtempSync(
+      path.join(util.getTempDir(), 'verify-signature-gpg-home-')
+    );
+  } catch (error) {
+    try {
+      await io.rmRF(signaturePath);
+    } catch {
+      // ignore cleanup failures
+    }
+    throw new Error(
+      `Failed to create temporary GPG home directory for signature verification: ${
+        (error as Error).message
+      }`
+    );
+  }
+  try {
+    const publicKeyFile = path.join(gpgHome, 'public-key.asc');
+    fs.writeFileSync(publicKeyFile, publicKeyContent, {encoding: 'utf-8'});
+    const options: ExecOptions = {silent: true};
+    await exec.exec(
+      'gpg',
+      [
+        '--homedir',
+        toGpgPath(gpgHome),
+        '--batch',
+        '--import',
+        toGpgPath(publicKeyFile)
+      ],
+      options
+    );
+    await exec.exec(
+      'gpg',
+      [
+        '--homedir',
+        toGpgPath(gpgHome),
+        '--batch',
+        '--verify',
+        toGpgPath(signaturePath),
+        toGpgPath(archivePath)
+      ],
+      options
+    );
+  } finally {
+    await io.rmRF(signaturePath);
+    await io.rmRF(gpgHome);
+  }
+}
@@ -28,6 +28,12 @@ async function run() {
      constants.INPUT_CACHE_DEPENDENCY_PATH
    );
    const checkLatest = getBooleanInput(constants.INPUT_CHECK_LATEST, false);
+    const verifySignature = getBooleanInput(
+      constants.INPUT_VERIFY_SIGNATURE,
+      false
+    );
+    const verifySignaturePublicKey =
+      core.getInput(constants.INPUT_VERIFY_SIGNATURE_PUBLIC_KEY) || undefined;
    let toolchainIds = core.getMultilineInput(constants.INPUT_MVN_TOOLCHAIN_ID);

    core.startGroup('Installed distributions');
@@ -44,6 +50,8 @@ async function run() {
      architecture,
      packageType,
      checkLatest,
+      verifySignature,
+      verifySignaturePublicKey,
      distributionName,
      jdkFile,
      toolchainIds
@@ -100,6 +108,8 @@ async function installVersion(
    architecture,
    packageType,
    checkLatest,
+    verifySignature,
+    verifySignaturePublicKey,
    toolchainIds
  } = options;

@@ -107,6 +117,8 @@ async function installVersion(
    architecture,
    packageType,
    checkLatest,
+    verifySignature,
+    verifySignaturePublicKey,
    version
  };

@@ -141,6 +153,8 @@ interface installerInputsOptions {
  architecture: string;
  packageType: string;
  checkLatest: boolean;
+  verifySignature: boolean;
+  verifySignaturePublicKey: string | undefined;
  distributionName: string;
  jdkFile: string;
  toolchainIds: Array<string>;
Author	SHA1	Message	Date
John	b150355f04	feat: Add verify-signature plumbing and Temurin+Microsoft verification support (#1060 ) * Add verify-signature plumbing and Temurin verification support * Rebuild dist after signature verification changes * Refine signature verification errors and regenerate dist * refactor: make gpg.ts generic, move Adoptium-specific constant to temurin distribution * fix: mock renameWinArchive in temurin tests and add signature e2e job * refactor: bundle Adoptium public key, replace keyserver lookup with local import * feat: add verify-signature-public-key input to allow custom GPG key override * refactor: extract Adoptium public key to adoptium-key.ts; tighten gpg.ts cleanup scope * Add verify-signature plumbing and Temurin verification support * Potential fix for pull request finding Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com> * Potential fix for pull request finding Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com> * Add Microsoft signature verification support * Regenerate dist bundles for Microsoft signature checks * Harden Microsoft signature URL handling * Add setup-java-microsoft-signature-verification e2e job * chore: regenerate dist files * Fix e2e-versions: remove duplicate job, update signature jobs to checkout@v7 with env vars * Fix Prettier formatting in test files * fix: mock renameWinArchive in microsoft-installer tests to fix Windows CI failure * fix: use --homedir flag instead of GNUPGHOME env var for Windows GPG compatibility The Git-bundled GPG on Windows (MSYS2-based) does not automatically convert Windows-style paths in environment variables like GNUPGHOME. This caused GPG to fail with exit code 2 when verifying Microsoft JDK signatures on Windows, because the GNUPGHOME path (D:\a\_temp\...) was not recognized as a valid POSIX path. Fix: pass --homedir as an explicit command-line argument to both gpg --import and gpg --verify. MSYS2 does correctly convert Windows paths in command-line arguments, so this approach works reliably on Windows, Linux, and macOS. * fix: convert Windows paths to POSIX format for MSYS2 GPG on Windows The Git-bundled GPG on Windows (C:\Program Files\Git\usr\bin\gpg.exe) is an MSYS2-based binary that uses POSIX path conventions internally. When Windows-style paths with backslashes and drive letters (D:\a\_temp\...) are passed as arguments, GPG may fail to resolve them correctly, resulting in a fatal error (exit code 2). Fix: add a toGpgPath() helper that converts Windows paths to MSYS2 POSIX format (/d/a/_temp/...) before passing them to any gpg command. On Linux and macOS the helper is a no-op. Applied to all four paths used in verifyPackageSignature: - gpgHome (--homedir argument) - publicKeyFile (--import argument) - signaturePath (--verify signature argument) - archivePath (--verify data argument) * Fix gpg test formatting --------- Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com> Co-authored-by: Bruno Borges <brborges@microsoft.com>	2026-06-29 13:19:49 +01:00
dependabot[bot]	e9339ddc84	Bump @typescript-eslint/parser from 8.61.1 to 8.62.0 (#1062 ) Bumps [@typescript-eslint/parser](https://github.com/typescript-eslint/typescript-eslint/tree/HEAD/packages/parser) from 8.61.1 to 8.62.0. - [Release notes](https://github.com/typescript-eslint/typescript-eslint/releases) - [Changelog](https://github.com/typescript-eslint/typescript-eslint/blob/main/packages/parser/CHANGELOG.md) - [Commits](https://github.com/typescript-eslint/typescript-eslint/commits/v8.62.0/packages/parser) --- updated-dependencies: - dependency-name: "@typescript-eslint/parser" dependency-version: 8.62.0 dependency-type: direct:development update-type: version-update:semver-minor ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>	2026-06-29 09:13:56 +01:00
dependabot[bot]	bf1fac860b	Bump actions/setup-python from 5 to 6 (#1067 ) Bumps [actions/setup-python](https://github.com/actions/setup-python) from 5 to 6. - [Release notes](https://github.com/actions/setup-python/releases) - [Commits](https://github.com/actions/setup-python/compare/v5...v6) --- updated-dependencies: - dependency-name: actions/setup-python dependency-version: '6' dependency-type: direct:production update-type: version-update:semver-major ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>	2026-06-29 09:13:25 +01:00
dependabot[bot]	aff09c2230	Bump actions/checkout from 6 to 7 (#1068 ) Bumps [actions/checkout](https://github.com/actions/checkout) from 6 to 7. - [Release notes](https://github.com/actions/checkout/releases) - [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md) - [Commits](https://github.com/actions/checkout/compare/v6...v7) --- updated-dependencies: - dependency-name: actions/checkout dependency-version: '7' dependency-type: direct:production update-type: version-update:semver-major ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>	2026-06-29 09:12:58 +01:00
dependabot[bot]	c5f2f2ea96	Bump github/codeql-action from 3 to 4 (#1069 ) Bumps [github/codeql-action](https://github.com/github/codeql-action) from 3 to 4. - [Release notes](https://github.com/github/codeql-action/releases) - [Changelog](https://github.com/github/codeql-action/blob/main/CHANGELOG.md) - [Commits](https://github.com/github/codeql-action/compare/v3...v4) --- updated-dependencies: - dependency-name: github/codeql-action dependency-version: '4' dependency-type: direct:production update-type: version-update:semver-major ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>	2026-06-29 09:12:17 +01:00
Bruno Borges	623c707d77	chore: enforce pre-PR validation (aggregate scripts, git hooks, PR checklist) (#1061 ) * chore: enforce pre-PR validation with aggregate scripts, git hooks, and PR checklist Add tooling to help contributors run the same checks as CI before submitting a pull request, reducing avoidable format/lint/build failures. - Add aggregate npm scripts: - `npm run check` runs format-check + lint + build + test (mirrors CI) - `npm run fix` runs format + lint:fix + build - Add husky + lint-staged git hooks (installed via `npm install`): - pre-commit formats and lints staged files - pre-push rebuilds dist/ and runs the test suite - Add a checklist item to the PR template prompting contributors to run `npm run check` locally - Document the aggregate scripts and hooks in docs/contributors.md dist/ is intentionally not auto-committed by CI to avoid pwn-request security risks; the existing `Check dist/` workflow continues to verify it. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * Apply suggestions from code review Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com> --------- Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>	2026-06-26 08:07:16 +01:00
Bruno Borges	1bcf9fb12c	dist: Address Copilot review suggestions from PR #1042 (GraalVM Community) (#1059 ) - installer: surface a clear error when the GraalVM Community releases listing is not a JSON array, instead of silently treating an error payload (rate limit, auth failure, etc.) as "no releases" which later surfaced as a misleading "version not found" error. - docs: fix the GraalVM Community advanced-usage example to check the installed binary versions (java/native-image --version) rather than running a non-existent HelloWorldApp classpath that fails when copied. - tests: cover the new non-array release listing error path. Rebuilt dist bundle. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>	2026-06-23 13:37:44 -04:00
Bruno Borges	fa2c6508d1	docs: note jdkfile approach for Early Access / unreleased JDK builds (#1058 ) * docs: note jdkfile approach for Early Access / unreleased JDK builds Clarify in advanced-usage that the existing 'jdkfile' distribution can be used to install Early Access (EA) or other unreleased JDK builds not provided directly by setup-java, by downloading the archive in a prior step and pointing jdkFile at it. Adds a concrete EA example. Addresses #612. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * Potential fix for pull request finding Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com> * Apply suggestions from code review Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com> --------- Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>	2026-06-23 13:23:45 -04:00
Copilot	1d56e31dbb	dist: Add GraalVM Community distribution support (#1042 ) * Initial plan * feat: add graalvm community distribution support * build: update bundled dist for graalvm community support * chore: address GraalVM community review feedback * fix: tidy graalvm community validation follow-ups * refactor: simplify GraalVM Community release resolution * refactor: address review feedback on Community resolver * refactor: rename pagination index for clarity * test: fix graalvm installer test formatting --------- Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: Bruno Borges <brborges@microsoft.com>	2026-06-23 13:19:27 -04:00
Bruno Borges	1d25252804	chore: Harden workflows: least-privilege permissions + zizmor integration (#1039 ) * Harden workflows with least-privilege permissions and zizmor Apply GitHub Actions security best practices to the action's own workflows and integrate zizmor to catch regressions. - Add explicit least-privilege `permissions:` to every workflow (contents: read for read-only workflows; default-deny `{}` with job-scoped grants for codeql, publish-immutable-actions and update-config-files). - Set `persist-credentials: false` on all checkout steps that don't need the GITHUB_TOKEN afterwards. - Move `${{ ... }}` expansions out of `run:` blocks into `env:` vars to avoid template injection. - Pin the alpine container image (alpine:latest -> alpine:3.21). - Add a zizmor CI workflow that uploads SARIF to code scanning, plus a `.github/zizmor.yml` pinning policy (ref-pin for actions/* and github/, hash-pin for third-party actions). zizmor now reports no findings (offline and online). Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Potential fix for pull request finding Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com> * Fix indentation of if: in zizmor SARIF upload step The `if:` key on the "Upload SARIF results to code scanning" step had no indentation, producing invalid YAML ("Nested mappings are not allowed in compact mappings"). This broke `npm run format-check` (prettier) in Basic validation. Indent `if:` to 8 spaces so it nests under the step alongside uses/with. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> --------- Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>	2026-06-23 18:10:17 +01:00
Bruno Borges	668c1ea991	docs: add post-install keytool import for the JDK cacerts trust store (#1051 ) Document how to make the installed JDK trust an internal CA at application runtime by importing it into $JAVA_HOME/lib/security/cacerts with keytool after setup-java runs. Clarifies this is the runtime trust layer, distinct from the download/transport layer (NODE_EXTRA_CA_CERTS), and notes hosted vs self-hosted persistence caveats. Refs #640 #1035 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>	2026-06-22 21:59:01 -04:00
Bruno Borges	a9a46fbe09	docs: document self-signed certificate / internal CA handling for GitHub Enterprise (#1050 ) Adds an advanced-usage section explaining the 'self signed certificate in certificate chain' error seen on GitHub Enterprise Server and behind TLS-inspecting proxies. Recommends the secure fix of trusting the internal CA via NODE_EXTRA_CA_CERTS (or the OS trust store on self-hosted runners), with a GitHub Enterprise callout, and warns against disabling TLS verification since the JDK download has no checksum fallback. Refs #640 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>	2026-06-22 21:51:01 -04:00