Release v2.276.1

* Update ldd check with dotnet 5.

* Runner v2.276.0 fixes (#928)

* Revert "always use Fips Cryptography (#896)"

3b34e203dc

* Revert "Update ldd check with dotnet 5."

4b6ded0a01

* Revert "Update SDK to .NET 5 (#799)"

fc3ca9bb92

* Update dotnet-install scripts

* prep 2.276.1 runner release (#929)

Co-authored-by: Tingluo Huang <huangtingluo@gmail.com>

.github/workflows/codeql.yml

@@ -2,6 +2,7 @@ name: "Code Scanning - Action"
 
 on:
   push:
+  pull_request:
   schedule:
     - cron: '0 0 * * 0'
 

.github/workflows/e2etest.yml

@@ -0,0 +1,335 @@
+name: Runner E2E Test
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+    - main
+    - releases/*
+
+jobs:
+  init:
+    name: Initialize workflow ☕
+    runs-on: ubuntu-latest
+    outputs:
+      unique_runner_label: ${{steps.generator.outputs.runner_label}}
+    steps:
+    - name: Delete all runners
+      uses: actions/github-script@v3
+      with:
+        debug: true
+        script: |
+          var runnersResp = await github.actions.listSelfHostedRunnersForRepo({
+              owner: 'actions',
+              repo: 'runner',
+              per_page: '100'
+          });
+          for(var i=0; i<runnersResp.data.total_count; i++){
+            core.debug(JSON.stringify(runnersResp.data.runners[i]))
+            await github.actions.deleteSelfHostedRunnerFromRepo({
+              owner: 'actions',
+              repo: 'runner',
+              runner_id: runnersResp.data.runners[i].id
+            });
+          }
+        github-token: ${{secrets.PAT}}
+    - name: Generate Unique Runner label
+      id: generator
+      run: |
+        label=$(openssl rand -hex 16)
+        echo ::set-output name=runner_label::$label
+
+  build:
+    name: Build runner packages 🏗 📦
+    strategy:
+      matrix:
+        runtime: [ linux-x64, linux-arm64, linux-arm, win-x64, osx-x64 ]
+        include:
+        - runtime: linux-x64
+          os: ubuntu-latest
+          devScript: ./dev.sh
+
+        - runtime: linux-arm64
+          os: ubuntu-latest
+          devScript: ./dev.sh
+
+        - runtime: linux-arm
+          os: ubuntu-latest
+          devScript: ./dev.sh
+
+        - runtime: osx-x64
+          os: macOS-latest
+          devScript: ./dev.sh
+
+        - runtime: win-x64
+          os: windows-latest
+          devScript: ./dev
+
+    runs-on: ${{ matrix.os }}
+    steps:
+    - uses: actions/checkout@v1
+
+    # Build runner layout
+    - name: Build & Layout Release
+      run: |
+        ${{ matrix.devScript }} layout Release ${{ matrix.runtime }}
+      working-directory: src
+    
+    # Create runner package tar.gz/zip
+    - name: Package Release
+      run: |
+         ${{ matrix.devScript }} package Release ${{ matrix.runtime }}
+      working-directory: src
+
+    # Upload runner package tar.gz/zip as artifact
+    - name: Publish Artifact
+      uses: actions/upload-artifact@v1
+      with:
+        name: runner-package-${{ matrix.runtime }}
+        path: _package
+
+  dispatch_workflow:
+    name: Dispatch workflow to runners 🚨
+    needs: [init, build]
+    runs-on: ubuntu-latest
+    steps:
+    - name: Dispatch workflow
+      timeout-minutes: 10
+      uses: actions/github-script@v3
+      with:
+        debug: true
+        script: |
+          function sleep(ms) { return new Promise(resolve => setTimeout(resolve, ms)); }
+          async function dispatchWorkflow(runner) {
+            await github.actions.createWorkflowDispatch({
+              owner: 'actions',
+              repo: 'runner',
+              workflow_id: 'runner-basic-e2e-test-case.yml',
+              ref: 'main',
+              inputs: {target_runner: runner}
+            });
+          }
+          var runWin64 = false, runLinux64 = false, runOsx64 = false, runLinuxARM64 = false;
+          while (true) {
+            core.info(`------------- Waiting for runners to be configured --------------`)
+            await sleep(10000);
+            var runnersResp = await github.actions.listSelfHostedRunnersForRepo({owner: 'actions', repo: 'runner', per_page: '100'});
+            for (var i = 0; i < runnersResp.data.total_count; i++) {
+              core.debug(JSON.stringify(runnersResp.data.runners[i]))
+              var labels = runnersResp.data.runners[i].labels;
+              for (var j = 0; j < labels.length; j++) {
+                core.debug(`Comparing: ${labels[j].name} to win-x64/linux-x64/osx-x64/linux-arm64-${{ needs.init.outputs.unique_runner_label }}`)
+                if (labels[j].name == 'win-x64-${{needs.init.outputs.unique_runner_label}}' && runWin64 == false) {
+                  core.info(`------------------- Windows runner is configured, queue Windows Run -------------------------`)
+                  runWin64 = true;
+                  await dispatchWorkflow('win-x64-${{needs.init.outputs.unique_runner_label}}');
+                  break;
+                } else if (labels[j].name == 'linux-x64-${{needs.init.outputs.unique_runner_label}}' && runLinux64 == false) {
+                  core.info(`------------------- Linux runner is configured, queue Linux Run -------------------------`)
+                  runLinux64 = true;
+                  await dispatchWorkflow('linux-x64-${{needs.init.outputs.unique_runner_label}}');
+                  break;
+                } else if (labels[j].name == 'osx-x64-${{needs.init.outputs.unique_runner_label}}' && runOsx64 == false) {
+                  core.info(`------------------- macOS runner is configured, queue macOS Run -------------------------`)
+                  runOsx64 = true;
+                  await dispatchWorkflow('osx-x64-${{needs.init.outputs.unique_runner_label}}');
+                  break;
+                } else if (labels[j].name == 'linux-arm64-${{needs.init.outputs.unique_runner_label}}' && runLinuxARM64 == false) {
+                  core.info(`------------------- Linux ARM64 runner is configured, queue Linux ARM64 Run-------------------------`)
+                  runLinuxARM64 = true;
+                  await dispatchWorkflow('linux-arm64-${{needs.init.outputs.unique_runner_label}}');
+                  break;
+                }
+              }
+            }
+            if (runWin64 && runLinux64 && runOsx64 && runLinuxARM64) {
+              core.info(`--------------------- ALL runner are running jobs --------------------------`)
+              break;
+            } else {
+              core.info(`---------- Windows running: ${runWin64} -- Linux running: ${runLinux64} -- macOS running: ${runOsx64} -- Linux ARM64 running: ${runLinuxARM64} -----------`)
+            }
+          }
+        github-token: ${{secrets.PAT}}
+
+  LinuxE2E:
+    needs: [build, init]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download Runner
+        uses: actions/download-artifact@v2
+        with:
+          name: runner-package-linux-x64
+      - name: Unzip Runner Package
+        run: |
+          tar -xzf *.tar.gz
+      - name: Configure Runner
+        env:
+          unique_runner_name: linux-x64-${{needs.init.outputs.unique_runner_label}}
+        run: |
+          ./config.sh --url ${{github.event.repository.html_url}} --unattended --name $unique_runner_name --pat ${{secrets.PAT}} --labels $unique_runner_name --replace
+      - name: Start Runner and Wait for Job
+        timeout-minutes: 5
+        run: |
+          ./run.sh --once
+      - name: Remove Runner
+        if: always()
+        continue-on-error: true
+        run: |
+          ./config.sh remove --pat ${{secrets.PAT}}
+      - name: Upload Runner Logs
+        if: always()
+        uses: actions/upload-artifact@v2
+        with:
+          name: linux_x64_logs
+          path: _diag
+  macOSE2E:
+    needs: [build, init]
+    runs-on: macos-latest
+    steps:
+      - name: Download Runner
+        uses: actions/download-artifact@v2
+        with:
+          name: runner-package-osx-x64
+      - name: Unzip Runner Package
+        run: |
+          tar -xzf *.tar.gz
+      - name: Configure Runner
+        env:
+          unique_runner_name: osx-x64-${{needs.init.outputs.unique_runner_label}}
+        run: |
+          ./config.sh --url ${{github.event.repository.html_url}} --unattended --name $unique_runner_name --pat ${{secrets.PAT}} --labels $unique_runner_name --replace
+      - name: Start Runner and Wait for Job
+        timeout-minutes: 5
+        run: |
+          ./run.sh --once
+      - name: Remove Runner
+        if: always()
+        continue-on-error: true
+        run: |
+          ./config.sh remove --pat ${{secrets.PAT}}
+      - name: Upload Runner Logs
+        if: always()
+        uses: actions/upload-artifact@v2
+        with:
+          name: osx_x64_logs
+          path: _diag
+
+  ARM64E2E:
+    needs: [build, init]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download Runner
+        uses: actions/download-artifact@v2
+        with:
+          name: runner-package-linux-arm64
+      - name: Unzip Runner Package
+        run: |
+          tar -xzf *.tar.gz
+      - name: Prepare QEMU
+        run: |
+          docker run --rm --privileged multiarch/qemu-user-static:register --reset
+      - name: Configure Runner
+        uses: docker://multiarch/ubuntu-core:arm64-bionic
+        with:
+          args: 'bash -c "apt-get update && apt-get install -y curl && ./bin/installdependencies.sh && ./config.sh --unattended --name $unique_runner_name --url ${{github.event.repository.html_url}} --pat ${{secrets.PAT}} --labels $unique_runner_name  --replace"'
+        env:
+          RUNNER_ALLOW_RUNASROOT: 1
+          unique_runner_name: linux-arm64-${{needs.init.outputs.unique_runner_label}}
+
+      - name: Start Runner and Wait for Job
+        timeout-minutes: 5
+        uses: docker://multiarch/ubuntu-core:arm64-bionic
+        with:
+          args: 'bash -c "apt-get update && apt-get install -y curl git && ./bin/installdependencies.sh && ./run.sh --once"'
+        env:
+          RUNNER_ALLOW_RUNASROOT: 1
+
+      - name: Remove Runner
+        if: always()
+        continue-on-error: true
+        uses: docker://multiarch/ubuntu-core:arm64-bionic
+        with:
+          args: 'bash -c "apt-get update && apt-get install -y curl && ./bin/installdependencies.sh && ./config.sh remove --pat ${{secrets.PAT}}"'
+        env:
+          RUNNER_ALLOW_RUNASROOT: 1
+
+      - name: Upload Runner Logs
+        if: always()
+        uses: actions/upload-artifact@v2
+        with:
+          name: linux_arm64_logs
+          path: _diag
+
+  WindowsE2E:
+    needs: [build, init]
+    runs-on: windows-latest
+    steps:
+      - name: Download Runner
+        uses: actions/download-artifact@v2
+        with:
+          name: runner-package-win-x64
+      - name: Unzip Runner Package
+        run: |
+          Get-ChildItem *.zip | Expand-Archive -DestinationPath $PWD
+      - name: Configure Runner
+        shell: cmd
+        run: |
+          config.cmd --unattended --url ${{github.event.repository.html_url}} --name %unique_runner_name% --pat ${{secrets.PAT}} --labels %unique_runner_name% --replace
+        env:
+          unique_runner_name: win-x64-${{needs.init.outputs.unique_runner_label}}
+
+      - name: Start Runner and Wait for Job
+        shell: cmd
+        timeout-minutes: 5
+        run: |
+          run.cmd --once
+      - name: Remove Runner
+        shell: cmd
+        if: always()
+        continue-on-error: true
+        run: |
+          config.cmd remove --pat ${{secrets.PAT}}
+      - name: Upload Runner Logs
+        if: always()
+        uses: actions/upload-artifact@v2
+        with:
+          name: win_x64_logs
+          path: _diag
+  
+  check:
+    name: Check runner logs 🕵️‍♂️
+    needs: [WindowsE2E, LinuxE2E, macOSE2E, ARM64E2E]
+    runs-on: ubuntu-latest
+    steps:
+    - name: Download Linux Runner Logs
+      uses: actions/download-artifact@v2
+      with:
+        name: linux_x64_logs
+        path: linux_x64_logs
+    - name: Download macOS Runner Logs
+      uses: actions/download-artifact@v2
+      with:
+        name: osx_x64_logs
+        path: osx_x64_logs
+    - name: Download Linux ARM64 Runner Logs
+      uses: actions/download-artifact@v2
+      with:
+        name: linux_arm64_logs
+        path: linux_arm64_logs
+    - name: Download Windows Runner Logs
+      uses: actions/download-artifact@v2
+      with:
+        name: win_x64_logs
+        path: win_x64_logs
+    - name: Check Runner Logs
+      run: |
+        function failed()
+        {
+            local error=${1:-Undefined error}
+            echo "Failed: $error" >&2
+            exit 1
+        }
+        grep -R "completed with result: Succeeded" ./win_x64_logs || failed "Windows Runner fail to run the job, please check logs"
+        grep -R "completed with result: Succeeded" ./linux_x64_logs || failed "Linux Runner fail to run the job, please check logs"
+        grep -R "completed with result: Succeeded" ./osx_x64_logs || failed "macOS Runner fail to run the job, please check logs"
+        grep -R "completed with result: Succeeded" ./linux_arm64_logs || failed "Linux ARM64 Runner fail to run the job, please check logs"

.github/workflows/runner-basic-e2e-test-case.yml

@@ -0,0 +1,31 @@
+name: Runner Basics Test Case
+
+on:
+  workflow_dispatch:
+    inputs: 
+      target_runner:
+        description: 'Self-hosted runner will run the job'
+        required: true
+
+jobs:
+  test:
+    runs-on:
+    - self-hosted
+    - ${{github.event.inputs.target_runner}}
+
+    name: Runner Basic Test 🛠
+    steps:
+    - uses: actions/checkout@v2
+    - name: Run a one-line script
+      run: echo Hello, world!
+    - name: Run a multi-line script
+      shell: bash
+      run: |
+        printenv|sort
+        cat $GITHUB_EVENT_PATH
+    - name: Validate GitHub Context
+      shell: bash
+      run: |
+        declare -a context_vars=("GITHUB_ACTION" "GITHUB_ACTIONS" "GITHUB_REPOSITORY" "GITHUB_WORKSPACE" "GITHUB_SHA" "GITHUB_RUN_ID" "GITHUB_RUN_NUMBER")
+        for var in ${context_vars[@]};
+        do [ -z "${!var}" ] && echo "##[error]$var not found" && exit 1 || echo "$var: ${!var}"; done

CODEOWNERS

@@ -0,0 +1 @@
+* @actions/actions-runtime

README.md

@@ -5,6 +5,7 @@
 # GitHub Actions Runner
 
 [![Actions Status](https://github.com/actions/runner/workflows/Runner%20CI/badge.svg)](https://github.com/actions/runner/actions)
+[![Runner E2E Test](https://github.com/actions/runner/workflows/Runner%20E2E%20Test/badge.svg)](https://github.com/actions/runner/actions)
 
 The runner is the application that runs a job from a GitHub Actions workflow. It is used by GitHub Actions in the [hosted virtual environments](https://github.com/actions/virtual-environments), or you can [self-host the runner](https://help.github.com/en/actions/automating-your-workflow-with-github-actions/about-self-hosted-runners) in your own environment.
 

docs/checks/actions.md

@@ -0,0 +1,44 @@
+
+# Actions Connection Check
+
+## What is this check for?
+
+Make sure the runner has access to actions service for GitHub.com or GitHub Enterprise Server
+
+- For GitHub.com
+  - The runner needs to access https://api.github.com for downloading actions.
+  - The runner needs to access https://vstoken.actions.githubusercontent.com/_apis/.../ for requesting an access token.
+  - The runner needs to access https://pipelines.actions.githubusercontent.com/_apis/.../ for receiving workflow jobs.
+- For GitHub Enterprise Server
+  - The runner needs to access https://myGHES.com/api/v3 for downloading actions.
+  - The runner needs to access https://myGHES.com/_services/vstoken/_apis/.../ for requesting an access token.
+  - The runner needs to access https://myGHES.com/_services/pipelines/_apis/.../ for receiving workflow jobs.
+
+## What is checked?
+
+- DNS lookup for api.github.com or myGHES.com using dotnet
+- Ping api.github.com or myGHES.com using dotnet
+- Make HTTP GET to https://api.github.com or https://myGHES.com/api/v3 using dotnet, check response headers contains `X-GitHub-Request-Id` 
+---
+- DNS lookup for vstoken.actions.githubusercontent.com using dotnet
+- Ping vstoken.actions.githubusercontent.com using dotnet
+- Make HTTP GET to https://vstoken.actions.githubusercontent.com/_apis/health or https://myGHES.com/_services/vstoken/_apis/health using dotnet, check response headers contains `x-vss-e2eid` 
+---
+- DNS lookup for pipelines.actions.githubusercontent.com using dotnet
+- Ping pipelines.actions.githubusercontent.com using dotnet
+- Make HTTP GET to https://pipelines.actions.githubusercontent.com/_apis/health or https://myGHES.com/_services/pipelines/_apis/health using dotnet, check response headers contains `x-vss-e2eid` 
+
+## How to fix the issue?
+
+### 1. Check the common network issue
+  
+  > Please check the [network doc](./network.md)
+
+### 2. SSL certificate related issue
+
+  If you are seeing `System.Net.Http.HttpRequestException: The SSL connection could not be established, see inner exception.` in the log, it means the runner can't connect to Actions service due to SSL handshake failure.
+  > Please check the [SSL cert doc](./sslcert.md)
+  
+## Still not working?
+
+Contact GitHub customer service or log an issue at https://github.com/actions/runner if you think it's a runner issue.

docs/checks/git.md

@@ -0,0 +1,34 @@
+# Git Connection Check
+
+## What is this check for?
+
+Make sure `git` can access GitHub.com or your GitHub Enterprise Server.
+
+
+## What is checked?
+
+The test is done by executing
+```bash
+# For GitHub.com
+git ls-remote --exit-code https://github.com/actions/checkout HEAD
+
+# For GitHub Enterprise Server
+git ls-remote --exit-code https://ghes.me/actions/checkout HEAD
+```
+
+The test also set environment variable `GIT_TRACE=1` and `GIT_CURL_VERBOSE=1` before running `git ls-remote`, this will make `git` to produce debug log for better debug any potential issues.
+
+## How to fix the issue?
+
+### 1. Check the common network issue
+  
+    > Please check the [network doc](./network.md)
+
+### 2. SSL certificate related issue
+
+  If you are seeing `SSL Certificate problem:` in the log, it means the `git` can't connect to the GitHub server due to SSL handshake failure.
+  > Please check the [SSL cert doc](./sslcert.md)
+  
+## Still not working?
+
+Contact GitHub customer service or log an issue at https://github.com/actions/runner if you think it's a runner issue.

docs/checks/internet.md

@@ -0,0 +1,26 @@
+# Internet Connection Check
+
+## What is this check for?
+
+Make sure the runner has access to https://api.github.com
+
+The runner needs to access https://api.github.com to download any actions from the marketplace.
+
+Even the runner is configured to GitHub Enterprise Server, the runner can still download actions from GitHub.com with [GitHub Connect](https://docs.github.com/en/enterprise-server@2.22/admin/github-actions/enabling-automatic-access-to-githubcom-actions-using-github-connect)
+
+
+## What is checked?
+
+- DNS lookup for api.github.com using dotnet
+- Ping api.github.com using dotnet
+- Make HTTP GET to https://api.github.com using dotnet, check response headers contains `X-GitHub-Request-Id` 
+
+## How to fix the issue?
+
+### 1. Check the common network issue
+  
+  > Please check the [network doc](./network.md)
+
+## Still not working?
+
+Contact GitHub customer service or log an issue at https://github.com/actions/runner if you think it's a runner issue.

docs/checks/network.md

@@ -0,0 +1,29 @@
+## Common Network Related Issues
+
+### Common things that can cause the runner to not working properly
+
+- Bug in the runner or the dotnet framework that causes actions runner can't make Http request in a certain network environment.
+
+- Proxy/Firewall block certain HTTP method, like it block all POST and PUT calls which the runner will use to upload logs.
+
+- Proxy/Firewall only allows requests with certain user-agent to pass through and the actions runner user-agent is not in the allow list.
+
+- Proxy try to decrypt and exam HTTPS traffic for security purpose but cause the actions-runner to fail to finish SSL handshake due to the lack of trusting proxy's CA.
+
+- Firewall rules that block action runner from accessing certain hosts, ex: `*.github.com`, `*.actions.githubusercontent.com`, etc.
+
+
+### Identify and solve these problems
+
+The key is to figure out where is the problem, the network environment, or the actions runner?
+
+Use a 3rd party tool to make the same requests as the runner did would be a good start point.
+
+- Use `nslookup` to check DNS
+- Use `ping` to check Ping
+- Use `curl -v` to check the network stack, good for verifying default certificate/proxy settings.
+- Use `Invoke-WebRequest` from `pwsh` (`PowerShell Core`) to check the dotnet network stack, good for verifying bugs in the dotnet framework.
+
+If the 3rd party tool is also experiencing the same error as the runner does, then you might want to contact your network administrator for help.
+
+Otherwise, contact GitHub customer support or log an issue at https://github.com/actions/runner

docs/checks/nodejs.md

@@ -0,0 +1,30 @@
+# Node.js Connection Check
+
+## What is this check for?
+
+Make sure the built-in node.js has access to GitHub.com or GitHub Enterprise Server.
+
+The runner carries it's own copy of node.js executable under `<runner_root>/externals/node12/`.
+
+All javascript base Actions will get executed by the built-in `node` at `<runner_root>/externals/node12/`.
+
+> Not the `node` from `$PATH`
+
+## What is checked?
+
+- Make HTTPS GET to https://api.github.com or https://myGHES.com/api/v3 using node.js, make sure it gets 200 response code.
+
+## How to fix the issue?
+
+### 1. Check the common network issue
+  
+  > Please check the [network doc](./network.md)
+
+### 2. SSL certificate related issue
+
+  If you are seeing `Https request failed due to SSL cert issue` in the log, it means the `node.js` can't connect to the GitHub server due to SSL handshake failure.
+  > Please check the [SSL cert doc](./sslcert.md)
+  
+## Still not working?
+
+Contact GitHub customer service or log an issue at https://github.com/actions/runner if you think it's a runner issue.

docs/checks/sslcert.md

@@ -0,0 +1,89 @@
+## SSL Certificate Related Issues
+
+You might run into an SSL certificate error when your GitHub Enterprise Server is using a self-signed SSL server certificate or a web proxy within your network is decrypting HTTPS traffic for a security audit.
+
+As long as your certificate is generated properly, most of the issues should be fixed after your trust the certificate properly on the runner machine.
+
+> Different OS might have extra requirements on SSL certificate,
+> Ex: macOS requires `ExtendedKeyUsage` https://support.apple.com/en-us/HT210176
+
+### Don't skip SSL cert validation
+
+> !!! DO NOT SKIP SSL CERT VALIDATION !!!  
+> !!! IT IS A BAD SECURITY PRACTICE !!!  
+
+### Download SSL certificate chain 
+
+Depends on how your SSL server certificate gets configured, you might need to download the whole certificate chain from a machine that has trusted the SSL certificate's CA.
+
+- Approach 1: Download certificate chain using a browser (Chrome, Firefox, IT), you can google for more example, [here is what I found](https://medium.com/@menakajain/export-download-ssl-certificate-from-server-site-url-bcfc41ea46a2)
+
+- Approach 2: Download certificate chain using OpenSSL, you can google for more example, [here is what I found](https://superuser.com/a/176721)
+
+- Approach 3: Ask your network administrator or the owner of the CA certificate to send you a copy of it
+
+### Trust CA certificate for the Runner
+
+The actions runner is a dotnet core application which will follow how dotnet load SSL CA certificates on each OS.
+
+You can get full details documentation at [here](https://docs.microsoft.com/en-us/dotnet/standard/security/cross-platform-cryptography#x509store)
+
+In short: 
+- Windows: Load from Windows certificate store.
+- Linux: Load from OpenSSL CA cert bundle.
+- macOS: Load from macOS KeyChain.
+
+To let the runner trusts your CA certificate, you will need to:
+1. Save your SSL certificate chain which includes the root CA and all intermediate CAs into a `.pem` file.
+2. Use `OpenSSL` to convert `.pem` file to a proper format for different OS, here is some [doc with sample commands](https://www.sslshopper.com/ssl-converter.html)
+3. Trust CA on different OS:
+    - Windows: https://docs.microsoft.com/en-us/skype-sdk/sdn/articles/installing-the-trusted-root-certificate
+    - macOS: ![trust ca cert](./../res/macOStrustCA.gif)
+    - Linux: Refer to the distribution documentation
+      1. RedHat: https://www.redhat.com/sysadmin/ca-certificates-cli
+      2. Ubuntu: http://manpages.ubuntu.com/manpages/focal/man8/update-ca-certificates.8.html
+      3. Google search: "trust ca certificate on [linux distribution]"
+      4. If all approaches failed, set environment variable `SSL_CERT_FILE` to the CA bundle `.pem` file we get. 
+    > To verity cert gets installed properly on Linux, you can try use `curl -v https://sitewithsslissue.com` and `pwsh -Command \"Invoke-WebRequest -Uri https://sitewithsslissue.com\"`
+
+### Trust CA certificate for Git CLI
+
+Git uses various CA bundle file depends on your operation system.
+- Git packaged the CA bundle file within the Git installation on Windows 
+- Git use OpenSSL certificate CA bundle file on Linux and macOS
+
+You can check where Git check CA file by running:
+```bash
+export GIT_CURL_VERBOSE=1
+git ls-remote https://github.com/actions/runner HEAD
+```
+
+You should see something like:
+```
+* Couldn't find host github.com in the .netrc file; using defaults
+*   Trying 140.82.114.4...
+* TCP_NODELAY set
+* Connected to github.com (140.82.114.4) port 443 (#0)
+* ALPN, offering h2
+* ALPN, offering http/1.1
+* successfully set certificate verify locations:
+*   CAfile: /etc/ssl/cert.pem
+  CApath: none
+* SSL connection using TLSv1.2 / ECDHE-RSA-AES128-GCM-SHA256
+```
+This tells me `/etc/ssl/cert.pem` is where it read trusted CA certificates.
+
+To let Git trusts your CA certificate, you will need to:
+1. Save your SSL certificate chain which includes the root CA and all intermediate CAs into a `.pem` file.
+2. Set `http.sslCAInfo` Git config or `GIT_SSL_CAINFO` environment variable to the full path of the `.pem` file [Git Doc](https://git-scm.com/docs/git-config#Documentation/git-config.txt-httpsslCAInfo)
+> I would recommend using `http.sslCAInfo` since it can be scope to certain hosts that need the extra trusted CA.  
+> Ex: `git config --global http.https://myghes.com/.sslCAInfo /extra/ca/cert.pem`  
+> This will make Git use the `/extra/ca/cert.pem` only when communicates with `https://myghes.com` and keep using the default CA bundle with others.
+
+### Trust CA certificate for Node.js
+
+Node.js has compiled a snapshot of the Mozilla CA store that is fixed at each version of Node.js' release time.
+
+To let Node.js trusts your CA certificate, you will need to:
+1. Save your SSL certificate chain which includes the root CA and all intermediate CAs into a `.pem` file.
+2. Set environment variable `NODE_EXTRA_CA_CERTS` which point to the file. ex: `export NODE_EXTRA_CA_CERTS=/full/path/to/cacert.pem` or `set NODE_EXTRA_CA_CERTS=C:\full\path\to\cacert.pem`

docs/start/envlinux.md

@@ -15,16 +15,16 @@ x64
   - openSUSE 15+
   - SUSE Enterprise Linux (SLES) 12 SP2+
 
-## Install .Net Core 3.x Linux Dependencies
+## Install .Net Core 5 Linux Dependencies
 
-The `./config.sh` will check .Net Core 3.x dependencies during runner configuration.  
+The `./config.sh` will check .Net Core 5 dependencies during runner configuration.  
 You might see something like this which indicate a dependency's missing.
 ```bash
 ./config.sh
     libunwind.so.8 => not found
     libunwind-x86_64.so.8 => not found
-Dependencies is missing for Dotnet Core 3.0
+Dependencies is missing for Dotnet 5
-Execute ./bin/installdependencies.sh to install any missing Dotnet Core 3.0 dependencies.
+Execute ./bin/installdependencies.sh to install any missing Dotnet 5 dependencies.
 ```
 You can easily correct the problem by executing `./bin/installdependencies.sh`.  
 The `installdependencies.sh` script should install all required dependencies on all supported Linux versions   

releaseNote.md

@@ -1,11 +1,11 @@
 ## Features
-  - Support environment URL parsing (#762, #778)
 
 ## Bugs
-  - Fixes #759 doesn't change proxy environment variables (#760)
+  - Downgrade runner to .NET 3 to address an issue with broken pipes in Ubuntu (#928)
+  - Fixed an issue where FIPS Cryptography broke back-compat scenarios (#928)
 
 ## Misc
-  - Add .editorconfig (#768)
+  - Updated dotnet install scripts (#928)
 
 ## Windows x64
 We recommend configuring the runner in a root folder of the Windows drive (e.g. "C:\actions-runner"). This will help avoid issues related to service identity folder permissions and long file path restrictions on Windows.

releaseVersion

@@ -1 +1 @@
-<Update to ./src/runnerversion when creating release>
+2.276.1

scripts/create-latest-svc.sh

@@ -12,12 +12,13 @@ set -e
 #
 # Usage:
 #     export RUNNER_CFG_PAT=<yourPAT>
-#     ./create-latest-svc scope [ghe_domain] [name] [user]
+#     ./create-latest-svc scope [ghe_domain] [name] [user] [labels]
 #
 #      scope       required  repo (:owner/:repo) or org (:organization)
 #      ghe_domain  optional  the fully qualified domain name of your GitHub Enterprise Server deployment
 #      name        optional  defaults to hostname
 #      user        optional  user svc will run as. defaults to current
+#      labels      optional  list of labels (split by comma) applied on the runner
 #
 # Notes:
 # PATS over envvars are more secure
@@ -30,6 +31,7 @@ runner_scope=${1}
 ghe_hostname=${2}
 runner_name=${3:-$(hostname)}
 svc_user=${4:-$USER}
+labels=${5}
 
 echo "Configuring runner @ ${runner_scope}"
 sudo echo
@@ -130,8 +132,8 @@ fi
 
 echo
 echo "Configuring ${runner_name} @ $runner_url"
-echo "./config.sh --unattended --url $runner_url --token *** --name $runner_name"
+echo "./config.sh --unattended --url $runner_url --token *** --name $runner_name --labels $labels"
-sudo -E -u ${svc_user} ./config.sh --unattended --url $runner_url --token $RUNNER_TOKEN --name $runner_name
+sudo -E -u ${svc_user} ./config.sh --unattended --url $runner_url --token $RUNNER_TOKEN --name $runner_name --labels $labels
 
 #---------------------------------------
 # Configuring as a service

src/Misc/dotnet-install.ps1

@@ -23,8 +23,6 @@
     Default: latest
     Represents a build version on specific channel. Possible values:
     - latest - most latest build on specific channel
-    - coherent - most latest coherent build on specific channel
-          coherent applies only to SDK downloads
     - 3-part version in a format A.B.C - represents specific version of build
           examples: 2.0.0-preview2-006120, 1.1.0
 .PARAMETER InstallDir
@@ -122,24 +120,42 @@ $VersionRegEx="/\d+\.\d+[^/]+/"
 $OverrideNonVersionedFiles = !$SkipNonVersionedFiles
 
 function Say($str) {
-    try
+    try {
-    {
         Write-Host "dotnet-install: $str"
     }
-    catch
+    catch {
-    {
         # Some platforms cannot utilize Write-Host (Azure Functions, for instance). Fall back to Write-Output
         Write-Output "dotnet-install: $str"
     }
 }
 
+function Say-Warning($str) {
+    try {
+        Write-Warning "dotnet-install: $str"
+    }
+    catch {
+        # Some platforms cannot utilize Write-Warning (Azure Functions, for instance). Fall back to Write-Output
+        Write-Output "dotnet-install: Warning: $str"
+    }
+}
+
+# Writes a line with error style settings.
+# Use this function to show a human-readable comment along with an exception.
+function Say-Error($str) {
+    try {
+        # Write-Error is quite oververbose for the purpose of the function, let's write one line with error style settings.
+        $Host.UI.WriteErrorLine("dotnet-install: $str")
+    }
+    catch {
+        Write-Output "dotnet-install: Error: $str"
+    }
+}
+
 function Say-Verbose($str) {
-    try
+    try {
-    {
         Write-Verbose "dotnet-install: $str"
     }
-    catch
+    catch {
-    {
         # Some platforms cannot utilize Write-Verbose (Azure Functions, for instance). Fall back to Write-Output
         Write-Output "dotnet-install: $str"
     }
@@ -156,7 +172,7 @@ function Invoke-With-Retry([ScriptBlock]$ScriptBlock, [int]$MaxAttempts = 3, [in
 
     while ($true) {
         try {
-            return $ScriptBlock.Invoke()
+            return & $ScriptBlock
         }
         catch {
             $Attempts++
@@ -270,18 +286,41 @@ function GetHTTPResponse([Uri] $Uri)
             # Default timeout for HttpClient is 100s.  For a 50 MB download this assumes 500 KB/s average, any less will time out
             # 20 minutes allows it to work over much slower connections.
             $HttpClient.Timeout = New-TimeSpan -Minutes 20
-            $Response = $HttpClient.GetAsync("${Uri}${FeedCredential}").Result
+            $Task = $HttpClient.GetAsync("${Uri}${FeedCredential}").ConfigureAwait("false");
-            if (($Response -eq $null) -or (-not ($Response.IsSuccessStatusCode))) {
+            $Response = $Task.GetAwaiter().GetResult();
-                 # The feed credential is potentially sensitive info. Do not log FeedCredential to console output.
+
-                $ErrorMsg = "Failed to download $Uri."
+            if (($null -eq $Response) -or (-not ($Response.IsSuccessStatusCode))) {
-                if ($Response -ne $null) {
+                # The feed credential is potentially sensitive info. Do not log FeedCredential to console output.
-                    $ErrorMsg += "  $Response"
+                $DownloadException = [System.Exception] "Unable to download $Uri."
+
+                if ($null -ne $Response) {
+                    $DownloadException.Data["StatusCode"] = [int] $Response.StatusCode
+                    $DownloadException.Data["ErrorMessage"] = "Unable to download $Uri. Returned HTTP status code: " + $DownloadException.Data["StatusCode"]
                 }
 
-                throw $ErrorMsg
+                throw $DownloadException
             }
 
-             return $Response
+            return $Response
+        }
+        catch [System.Net.Http.HttpRequestException] {
+            $DownloadException = [System.Exception] "Unable to download $Uri."
+
+            # Pick up the exception message and inner exceptions' messages if they exist
+            $CurrentException = $PSItem.Exception
+            $ErrorMsg = $CurrentException.Message + "`r`n"
+            while ($CurrentException.InnerException) {
+              $CurrentException = $CurrentException.InnerException
+              $ErrorMsg += $CurrentException.Message + "`r`n"
+            }
+
+            # Check if there is an issue concerning TLS.
+            if ($ErrorMsg -like "*SSL/TLS*") {
+                $ErrorMsg += "Ensure that TLS 1.2 or higher is enabled to use this script.`r`n"
+            }
+
+            $DownloadException.Data["ErrorMessage"] = $ErrorMsg
+            throw $DownloadException
         }
         finally {
              if ($HttpClient -ne $null) {
@@ -291,7 +330,7 @@ function GetHTTPResponse([Uri] $Uri)
     })
 }
 
-function Get-Latest-Version-Info([string]$AzureFeed, [string]$Channel, [bool]$Coherent) {
+function Get-Latest-Version-Info([string]$AzureFeed, [string]$Channel) {
     Say-Invocation $MyInvocation
 
     $VersionFileUrl = $null
@@ -306,12 +345,7 @@ function Get-Latest-Version-Info([string]$AzureFeed, [string]$Channel, [bool]$Co
         $VersionFileUrl = "$UncachedFeed/Runtime/$Channel/latest.version"
     }
     elseif (-not $Runtime) {
-        if ($Coherent) {
+        $VersionFileUrl = "$UncachedFeed/Sdk/$Channel/latest.version"
-            $VersionFileUrl = "$UncachedFeed/Sdk/$Channel/latest.coherent.version"
-        }
-        else {
-            $VersionFileUrl = "$UncachedFeed/Sdk/$Channel/latest.version"
-        }
     }
     else {
         throw "Invalid value for `$Runtime"
@@ -320,7 +354,8 @@ function Get-Latest-Version-Info([string]$AzureFeed, [string]$Channel, [bool]$Co
         $Response = GetHTTPResponse -Uri $VersionFileUrl
     }
     catch {
-        throw "Could not resolve version information."
+        Say-Error "Could not resolve version information."
+        throw
     }
     $StringContent = $Response.Content.ReadAsStringAsync().Result
 
@@ -346,7 +381,8 @@ function Parse-Jsonfile-For-Version([string]$JSonFile) {
         $JSonContent = Get-Content($JSonFile) -Raw | ConvertFrom-Json | Select-Object -expand "sdk" -ErrorAction SilentlyContinue
     }
     catch {
-        throw "Json file unreadable: '$JSonFile'"
+        Say-Error "Json file unreadable: '$JSonFile'"
+        throw
     }
     if ($JSonContent) {
         try {
@@ -359,7 +395,8 @@ function Parse-Jsonfile-For-Version([string]$JSonFile) {
             }
         }
         catch {
-            throw "Unable to parse the SDK node in '$JSonFile'"
+            Say-Error "Unable to parse the SDK node in '$JSonFile'"
+            throw
         }
     }
     else {
@@ -375,16 +412,12 @@ function Get-Specific-Version-From-Version([string]$AzureFeed, [string]$Channel,
     Say-Invocation $MyInvocation
 
     if (-not $JSonFile) {
-        switch ($Version.ToLower()) {
+        if ($Version.ToLower() -eq "latest") {
-            { $_ -eq "latest" } {
+            $LatestVersionInfo = Get-Latest-Version-Info -AzureFeed $AzureFeed -Channel $Channel
-                $LatestVersionInfo = Get-Latest-Version-Info -AzureFeed $AzureFeed -Channel $Channel -Coherent $False
+            return $LatestVersionInfo.Version
-                return $LatestVersionInfo.Version
+        }
-            }
+        else {
-            { $_ -eq "coherent" } {
+            return $Version 
-                $LatestVersionInfo = Get-Latest-Version-Info -AzureFeed $AzureFeed -Channel $Channel -Coherent $True
-                return $LatestVersionInfo.Version
-            }
-            default { return $Version }
         }
     }
     else {
@@ -619,6 +652,23 @@ function DownloadFile($Source, [string]$OutPath) {
     }
 }
 
+function SafeRemoveFile($Path) {
+    try {
+        if (Test-Path $Path) {
+            Remove-Item $Path
+            Say-Verbose "The temporary file `"$Path`" was removed."
+        }
+        else
+        {
+            Say-Verbose "The temporary file `"$Path`" does not exist, therefore is not removed."
+        }
+    }
+    catch
+    {
+        Say-Warning "Failed to remove the temporary file: `"$Path`", remove it manually."
+    }
+}
+
 function Prepend-Sdk-InstallRoot-To-Path([string]$InstallRoot, [string]$BinFolderRelativePath) {
     $BinPath = Get-Absolute-Path $(Join-Path -Path $InstallRoot -ChildPath $BinFolderRelativePath)
     if (-Not $NoPath) {
@@ -635,6 +685,11 @@ function Prepend-Sdk-InstallRoot-To-Path([string]$InstallRoot, [string]$BinFolde
     }
 }
 
+Say "Note that the intended use of this script is for Continuous Integration (CI) scenarios, where:"
+Say "- The SDK needs to be installed without user interaction and without admin rights."
+Say "- The SDK installation doesn't need to persist across multiple CI runs."
+Say "To set up a development environment or to run apps, use installers rather than this script. Visit https://dotnet.microsoft.com/download to get the installer.`r`n"
+
 $CLIArchitecture = Get-CLIArchitecture-From-Architecture $Architecture
 $SpecificVersion = Get-Specific-Version-From-Version -AzureFeed $AzureFeed -Channel $Channel -Version $Version -JSonFile $JSonFile
 $DownloadLink, $EffectiveVersion = Get-Download-Link -AzureFeed $AzureFeed -SpecificVersion $SpecificVersion -CLIArchitecture $CLIArchitecture
@@ -668,7 +723,7 @@ if ($DryRun) {
         Say "NOTE: Due to finding a version manifest with this runtime, it would actually install with version '$EffectiveVersion'"
     }
 
-    exit 0
+    return
 }
 
 if ($Runtime -eq "dotnet") {
@@ -702,7 +757,7 @@ $isAssetInstalled = Is-Dotnet-Package-Installed -InstallRoot $InstallRoot -Relat
 if ($isAssetInstalled) {
     Say "$assetName version $SpecificVersion is already installed."
     Prepend-Sdk-InstallRoot-To-Path -InstallRoot $InstallRoot -BinFolderRelativePath $BinFolderRelativePath
-    exit 0
+    return
 }
 
 New-Item -ItemType Directory -Force -Path $InstallRoot | Out-Null
@@ -710,30 +765,69 @@ New-Item -ItemType Directory -Force -Path $InstallRoot | Out-Null
 $installDrive = $((Get-Item $InstallRoot).PSDrive.Name);
 $diskInfo = Get-PSDrive -Name $installDrive
 if ($diskInfo.Free / 1MB -le 100) {
-    Say "There is not enough disk space on drive ${installDrive}:"
+    throw "There is not enough disk space on drive ${installDrive}:"
-    exit 0
 }
 
 $ZipPath = [System.IO.Path]::combine([System.IO.Path]::GetTempPath(), [System.IO.Path]::GetRandomFileName())
 Say-Verbose "Zip path: $ZipPath"
 
 $DownloadFailed = $false
-Say "Downloading link: $DownloadLink"
+
+$PrimaryDownloadStatusCode = 0
+$LegacyDownloadStatusCode = 0
+
+$PrimaryDownloadFailedMsg = ""
+$LegacyDownloadFailedMsg = ""
+
+Say "Downloading primary link $DownloadLink"
 try {
     DownloadFile -Source $DownloadLink -OutPath $ZipPath
 }
 catch {
-    Say "Cannot download: $DownloadLink"
+    if ($PSItem.Exception.Data.Contains("StatusCode")) {
+        $PrimaryDownloadStatusCode = $PSItem.Exception.Data["StatusCode"]
+    }
+
+    if ($PSItem.Exception.Data.Contains("ErrorMessage")) {
+        $PrimaryDownloadFailedMsg = $PSItem.Exception.Data["ErrorMessage"]
+    } else {
+        $PrimaryDownloadFailedMsg = $PSItem.Exception.Message
+    }
+
+    if ($PrimaryDownloadStatusCode -eq 404) {
+        Say "The resource at $DownloadLink is not available."
+    } else {
+        Say $PSItem.Exception.Message
+    }
+
+    SafeRemoveFile -Path $ZipPath
+
     if ($LegacyDownloadLink) {
         $DownloadLink = $LegacyDownloadLink
         $ZipPath = [System.IO.Path]::combine([System.IO.Path]::GetTempPath(), [System.IO.Path]::GetRandomFileName())
         Say-Verbose "Legacy zip path: $ZipPath"
-        Say "Downloading legacy link: $DownloadLink"
+        Say "Downloading legacy link $DownloadLink"
         try {
             DownloadFile -Source $DownloadLink -OutPath $ZipPath
         }
         catch {
-            Say "Cannot download: $DownloadLink"
+            if ($PSItem.Exception.Data.Contains("StatusCode")) {
+                $LegacyDownloadStatusCode = $PSItem.Exception.Data["StatusCode"]
+            }
+
+            if ($PSItem.Exception.Data.Contains("ErrorMessage")) {
+                $LegacyDownloadFailedMsg = $PSItem.Exception.Data["ErrorMessage"]
+            } else {
+                $LegacyDownloadFailedMsg = $PSItem.Exception.Message
+            }
+
+            if ($LegacyDownloadStatusCode -eq 404) {
+                Say "The resource at $DownloadLink is not available."
+            } else {
+                Say $PSItem.Exception.Message
+            }
+
+            SafeRemoveFile -Path $ZipPath
             $DownloadFailed = $true
         }
     }
@@ -743,7 +837,19 @@ catch {
 }
 
 if ($DownloadFailed) {
-    throw "Could not find/download: `"$assetName`" with version = $SpecificVersion`nRefer to: https://aka.ms/dotnet-os-lifecycle for information on .NET Core support"
+    if (($PrimaryDownloadStatusCode -eq 404) -and ((-not $LegacyDownloadLink) -or ($LegacyDownloadStatusCode -eq 404))) {
+        throw "Could not find `"$assetName`" with version = $SpecificVersion`nRefer to: https://aka.ms/dotnet-os-lifecycle for information on .NET Core support"
+    } else {
+        # 404-NotFound is an expected response if it goes from only one of the links, do not show that error.
+        # If primary path is available (not 404-NotFound) then show the primary error else show the legacy error.
+        if ($PrimaryDownloadStatusCode -ne 404) {
+            throw "Could not download `"$assetName`" with version = $SpecificVersion`r`n$PrimaryDownloadFailedMsg"
+        }
+        if (($LegacyDownloadLink) -and ($LegacyDownloadStatusCode -ne 404)) {
+            throw "Could not download `"$assetName`" with version = $SpecificVersion`r`n$LegacyDownloadFailedMsg"
+        }
+        throw "Could not download `"$assetName`" with version = $SpecificVersion"
+    }
 }
 
 Say "Extracting zip from $DownloadLink"
@@ -765,21 +871,24 @@ if (!$isAssetInstalled) {
     $isAssetInstalled = Is-Dotnet-Package-Installed -InstallRoot $InstallRoot -RelativePathToPackage $dotnetPackageRelativePath -SpecificVersion $SpecificVersion
 }
 
+# Version verification failed. More likely something is wrong either with the downloaded content or with the verification algorithm.
 if (!$isAssetInstalled) {
+    Say-Error "Failed to verify the version of installed `"$assetName`".`nInstallation source: $DownloadLink.`nInstallation location: $InstallRoot.`nReport the bug at https://github.com/dotnet/install-scripts/issues."
     throw "`"$assetName`" with version = $SpecificVersion failed to install with an unknown error."
 }
 
-Remove-Item $ZipPath
+SafeRemoveFile -Path $ZipPath
 
 Prepend-Sdk-InstallRoot-To-Path -InstallRoot $InstallRoot -BinFolderRelativePath $BinFolderRelativePath
 
+Say "Note that the script does not resolve dependencies during installation."
+Say "To check the list of dependencies, go to https://docs.microsoft.com/dotnet/core/install/windows#dependencies"
 Say "Installation finished"
-exit 0
 # SIG # Begin signature block
 # MIIjkgYJKoZIhvcNAQcCoIIjgzCCI38CAQExDzANBglghkgBZQMEAgEFADB5Bgor
 # BgEEAYI3AgEEoGswaTA0BgorBgEEAYI3AgEeMCYCAwEAAAQQH8w7YFlLCE63JNLG
-# KX7zUQIBAAIBAAIBAAIBAAIBADAxMA0GCWCGSAFlAwQCAQUABCAdMJOqDPFy5F1i
+# KX7zUQIBAAIBAAIBAAIBAAIBADAxMA0GCWCGSAFlAwQCAQUABCD2c707qnCLOLIC
-# HBXPyOE4hGkUv5EGyQzmS901lRr+baCCDYEwggX/MIID56ADAgECAhMzAAABh3IX
+# n6Mu5Gr4+Xp68foyZlGlTycnycc5l6CCDYEwggX/MIID56ADAgECAhMzAAABh3IX
 # chVZQMcJAAAAAAGHMA0GCSqGSIb3DQEBCwUAMH4xCzAJBgNVBAYTAlVTMRMwEQYD
 # VQQIEwpXYXNoaW5ndG9uMRAwDgYDVQQHEwdSZWRtb25kMR4wHAYDVQQKExVNaWNy
 # b3NvZnQgQ29ycG9yYXRpb24xKDAmBgNVBAMTH01pY3Jvc29mdCBDb2RlIFNpZ25p
@@ -856,50 +965,50 @@ exit 0
 # HjAcBgNVBAoTFU1pY3Jvc29mdCBDb3Jwb3JhdGlvbjEoMCYGA1UEAxMfTWljcm9z
 # b2Z0IENvZGUgU2lnbmluZyBQQ0EgMjAxMQITMwAAAYdyF3IVWUDHCQAAAAABhzAN
 # BglghkgBZQMEAgEFAKCBrjAZBgkqhkiG9w0BCQMxDAYKKwYBBAGCNwIBBDAcBgor
-# BgEEAYI3AgELMQ4wDAYKKwYBBAGCNwIBFTAvBgkqhkiG9w0BCQQxIgQgGfshXxhl
+# BgEEAYI3AgELMQ4wDAYKKwYBBAGCNwIBFTAvBgkqhkiG9w0BCQQxIgQgE/MRhWyu
-# 7+O9cl90lOU62gZCBmJzcomUxEL8+XyoDYQwQgYKKwYBBAGCNwIBDDE0MDKgFIAS
+# Zg+EA2WKcxYC31nHVCTE6guHppZppc70RtkwQgYKKwYBBAGCNwIBDDE0MDKgFIAS
 # AE0AaQBjAHIAbwBzAG8AZgB0oRqAGGh0dHA6Ly93d3cubWljcm9zb2Z0LmNvbTAN
-# BgkqhkiG9w0BAQEFAASCAQCPVhcZxxdIzkFdrv/FCW737QgR8fCO1/oRXwhigOyQ
+# BgkqhkiG9w0BAQEFAASCAQBvcYCjRDXUYEIz9j2j0r4GFI2Y3g/CoNxDDBaeQ+gV
-# P2MF39fIYsVXuzVnO8pYZZOeW04kMECcWf9420okd4lXP7Xc5m+5UrqPuN1UgNle
+# khO0fK0oLh18RbV271Mg6SF7X7+mXB5MnL68voVQDqHnsCYrIAuMF/AEpv9YuDDp
-# hhwLBiXuZaAfllBMWMeQi7DZmg7XW8Yay9TAbc2XSTGQ8foDxPllKFbdPvvQ2DRy
+# ZRJuqN7Vwg3HM02l/FyATBIMgf/V79aYzJL3jjtt9bRIyxk6aPU4XcwMeA4usnUQ
-# VRLyNNQQEo3IuHHa0nnVNaL2PUYJf0udMCdGkxIMbApAYcitJLSwMLqMzrMkrvS9
+# rMhIiQz07DgfSrcQWe4AvGFAIvqTAKE4P944EZWWVnWI/10rvatEAefqJZX3XljW
-# ubm7CgigsKRJ3cZtCtFFMUkMsstoVuKLFtu69OvOfgLy1qmKotE6EnF7xudV+qAA
+# sK/6NY/0MyAyiILOuXbvVS0YFbHaR2qd1jUXbrY79fS+H4Ts6qnbufOkHQvmcDxs
-# a+UxGVT715tK5kgb5eTr1K2NdWRj517oANQNOjR/m6OPoYIS8TCCEu0GCisGAQQB
+# 801wKLHumMdPTtMVzfVMCwPvrHP0wtzsFlmCcKjBbGpvoYIS8TCCEu0GCisGAQQB
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-# MDEwDQYJYIZIAWUDBAIBBQAEIHYNJoLIl+IWj/Npb6r479Guw3UW/q0/jJhqKgHm
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-# ZTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAJ4wvoacTvMNlXQTtfF/
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 # BgNVHSMEGDAWgBTVYzpcijGQ80N7fEYbxTNoWoVtVTBWBgNVHR8ETzBNMEugSaBH
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 # aW1TdGFQQ0FfMjAxMC0wNy0wMS5jcmwwWgYIKwYBBQUHAQEETjBMMEoGCCsGAQUF
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-# LB46l6XUch+qNN45ZmOTFwLot3JjwSrn4oycQ9qTET1TFDYd1QND0LiXmKz9OqBX
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-# ai6S8XdyCQEZvfL82jIAs9pwsAQ6XvV9jNybPStRgF/sOAM/Deyfmej9Tg9FcRwX
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-# ank2qgzdZZNb8GoEze7f1orcTF0Q89IUXWIlmwEwQFYF1wjn87N4ZxL9Z/xA2m/R
+# RKeJi6r5arSyI+NfKxvgoM21JNt1BcdlXuAecdd/k8UjxCscffanoK2n6LFw1PcZ
-# 1zizFylWP/mpamCnVfZZLkafFLNUNVmcvc+9gM7vceJs37d3ydabk4wR6ObR34sW
+# lEO7NId7o+soM2C0QY5BYdghpn7uqopB6ixyFIIkDXFub+1E7GmAEwfU6VwEHL7y
-# aLppmyPlsI1Qq5Lu6bJCWoXzYuWpkoK6oEep1gML6SRC3HKVS3UscZhtMIIGcTCC
+# 9rNE8bd+JrQs+yAtkkHy9FmXg/PsGq1daVzX1So7CJ6nyphpuHSN3VfTMIIGcTCC
 # BFmgAwIBAgIKYQmBKgAAAAAAAjANBgkqhkiG9w0BAQsFADCBiDELMAkGA1UEBhMC
 # VVMxEzARBgNVBAgTCldhc2hpbmd0b24xEDAOBgNVBAcTB1JlZG1vbmQxHjAcBgNV
 # BAoTFU1pY3Jvc29mdCBDb3Jwb3JhdGlvbjEyMDAGA1UEAxMpTWljcm9zb2Z0IFJv
@@ -937,33 +1046,33 @@ exit 0
 # NR4Iuto229Nfj950iEkSoYIC0jCCAjsCAQEwgfyhgdSkgdEwgc4xCzAJBgNVBAYT
 # AlVTMRMwEQYDVQQIEwpXYXNoaW5ndG9uMRAwDgYDVQQHEwdSZWRtb25kMR4wHAYD
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-# cGVyYXRpb25zIFB1ZXJ0byBSaWNvMSYwJAYDVQQLEx1UaGFsZXMgVFNTIEVTTjo2
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-# fvIEusNgYkb2kl5xQfxm3wynbxtP249vWF4GACZtqqSj3tcQ+xQ=
+# SZh2VLY/Yni9SCVHbYgvTOCh5ZZE5eOi6BwLf0T4xl5alHUx+AA=
 # SIG # End signature block

src/Misc/dotnet-install.sh

@@ -40,7 +40,7 @@ if [ -t 1 ] && command -v tput > /dev/null; then
 fi
 
 say_warning() {
-    printf "%b\n" "${yellow:-}dotnet_install: Warning: $1${normal:-}"
+    printf "%b\n" "${yellow:-}dotnet_install: Warning: $1${normal:-}" >&3
 }
 
 say_err() {
@@ -183,6 +183,9 @@ get_current_os_name() {
         elif is_musl_based_distro; then
             echo "linux-musl"
             return 0
+        elif [ "$linux_platform_name" = "linux-musl" ]; then
+            echo "linux-musl"
+            return 0
         else
             echo "linux"
             return 0
@@ -241,42 +244,6 @@ check_min_reqs() {
     return 0
 }
 
-check_pre_reqs() {
-    eval $invocation
-
-    if [ "${DOTNET_INSTALL_SKIP_PREREQS:-}" = "1" ]; then
-        return 0
-    fi
-
-    if [ "$(uname)" = "Linux" ]; then
-        if is_musl_based_distro; then
-            if ! command -v scanelf > /dev/null; then
-                say_warning "scanelf not found, please install pax-utils package."
-                return 0
-            fi
-            LDCONFIG_COMMAND="scanelf --ldpath -BF '%f'"
-            [ -z "$($LDCONFIG_COMMAND 2>/dev/null | grep libintl)" ] && say_warning "Unable to locate libintl. Probable prerequisite missing; install libintl (or gettext)."
-        else
-            if [ ! -x "$(command -v ldconfig)" ]; then
-                say_verbose "ldconfig is not in PATH, trying /sbin/ldconfig."
-                LDCONFIG_COMMAND="/sbin/ldconfig"
-            else
-                LDCONFIG_COMMAND="ldconfig"
-            fi
-            local librarypath=${LD_LIBRARY_PATH:-}
-            LDCONFIG_COMMAND="$LDCONFIG_COMMAND -NXv ${librarypath//:/ }"
-        fi
-
-        [ -z "$($LDCONFIG_COMMAND 2>/dev/null | grep zlib)" ] && say_warning "Unable to locate zlib. Probable prerequisite missing; install zlib."
-        [ -z "$($LDCONFIG_COMMAND 2>/dev/null | grep ssl)" ] && say_warning "Unable to locate libssl. Probable prerequisite missing; install libssl."
-        [ -z "$($LDCONFIG_COMMAND 2>/dev/null | grep libicu)" ] && say_warning "Unable to locate libicu. Probable prerequisite missing; install libicu."
-        [ -z "$($LDCONFIG_COMMAND 2>/dev/null | grep lttng)" ] && say_warning "Unable to locate liblttng. Probable prerequisite missing; install liblttng."
-        [ -z "$($LDCONFIG_COMMAND 2>/dev/null | grep libcurl)" ] && say_warning "Unable to locate libcurl. Probable prerequisite missing; install libcurl."
-    fi
-
-    return 0
-}
-
 # args:
 # input - $1
 to_lowercase() {
@@ -332,7 +299,7 @@ get_machine_architecture() {
     if command -v uname > /dev/null; then
         CPUName=$(uname -m)
         case $CPUName in
-        armv7l)
+        armv*l)
             echo "arm"
             return 0
             ;;
@@ -377,6 +344,30 @@ get_normalized_architecture_from_architecture() {
     return 1
 }
 
+# args:
+# user_defined_os - $1
+get_normalized_os() {
+    eval $invocation
+
+    local osname="$(to_lowercase "$1")"
+    if [ ! -z "$osname" ]; then
+        case "$osname" in
+            osx | freebsd | rhel.6 | linux-musl | linux)
+                echo "$osname"
+                return 0
+                ;;
+            *)
+                say_err "'$user_defined_os' is not a supported value for --os option, supported values are: osx, linux, linux-musl, freebsd, rhel.6. If you think this is a bug, report it at https://github.com/dotnet/install-scripts/issues."
+                return 1
+                ;;
+        esac
+    else
+        osname="$(get_current_os_name)" || return 1
+    fi
+    echo "$osname"
+    return 0
+}
+
 # The version text returned from the feeds is a 1-line or 2-line string:
 # For the SDK and the dotnet runtime (2 lines):
 # Line 1: # commit_hash
@@ -418,14 +409,12 @@ is_dotnet_package_installed() {
 # azure_feed - $1
 # channel - $2
 # normalized_architecture - $3
-# coherent - $4
 get_latest_version_info() {
     eval $invocation
 
     local azure_feed="$1"
     local channel="$2"
     local normalized_architecture="$3"
-    local coherent="$4"
 
     local version_file_url=null
     if [[ "$runtime" == "dotnet" ]]; then
@@ -433,11 +422,7 @@ get_latest_version_info() {
     elif [[ "$runtime" == "aspnetcore" ]]; then
         version_file_url="$uncached_feed/aspnetcore/Runtime/$channel/latest.version"
     elif [ -z "$runtime" ]; then
-        if [ "$coherent" = true ]; then
+         version_file_url="$uncached_feed/Sdk/$channel/latest.version"
-            version_file_url="$uncached_feed/Sdk/$channel/latest.coherent.version"
-        else
-            version_file_url="$uncached_feed/Sdk/$channel/latest.version"
-        fi
     else
         say_err "Invalid value for \$runtime"
         return 1
@@ -468,7 +453,6 @@ parse_jsonfile_for_version() {
     sdk_list=$(echo $sdk_section | awk -F"[{}]" '{print $2}')
     sdk_list=${sdk_list//[\" ]/}
     sdk_list=${sdk_list//,/$'\n'}
-    sdk_list="$(echo -e "${sdk_list}" | tr -d '[[:space:]]')"
 
     local version_info=""
     while read -r line; do
@@ -505,26 +489,16 @@ get_specific_version_from_version() {
     local json_file="$5"
 
     if [ -z "$json_file" ]; then
-        case "$version" in
+        if [[ "$version" == "latest" ]]; then 
-            latest)
+            local version_info
-                local version_info
+            version_info="$(get_latest_version_info "$azure_feed" "$channel" "$normalized_architecture" false)" || return 1
-                version_info="$(get_latest_version_info "$azure_feed" "$channel" "$normalized_architecture" false)" || return 1
+            say_verbose "get_specific_version_from_version: version_info=$version_info"
-                say_verbose "get_specific_version_from_version: version_info=$version_info"
+            echo "$version_info" | get_version_from_version_info
-                echo "$version_info" | get_version_from_version_info
+            return 0
-                return 0
+        else
-                ;;
+            echo "$version"
-            coherent)
+            return 0
-                local version_info
+        fi
-                version_info="$(get_latest_version_info "$azure_feed" "$channel" "$normalized_architecture" true)" || return 1
-                say_verbose "get_specific_version_from_version: version_info=$version_info"
-                echo "$version_info" | get_version_from_version_info
-                return 0
-                ;;
-            *)
-                echo "$version"
-                return 0
-                ;;
-        esac
     else
         local version_info
         version_info="$(parse_jsonfile_for_version "$json_file")" || return 1
@@ -538,6 +512,7 @@ get_specific_version_from_version() {
 # channel - $2
 # normalized_architecture - $3
 # specific_version - $4
+# normalized_os - $5
 construct_download_link() {
     eval $invocation
 
@@ -546,10 +521,8 @@ construct_download_link() {
     local normalized_architecture="$3"
     local specific_version="${4//[$'\t\r\n']}"
     local specific_product_version="$(get_specific_product_version "$1" "$4")"
-
+    local osname="$5"
-    local osname
+    
-    osname="$(get_current_os_name)" || return 1
-
     local download_link=null
     if [[ "$runtime" == "dotnet" ]]; then
         download_link="$azure_feed/Runtime/$specific_version/dotnet-runtime-$specific_product_version-$osname-$normalized_architecture.tar.gz"
@@ -588,14 +561,20 @@ get_specific_product_version() {
         return 1
     fi
 
-    specific_product_version=$(curl -s --fail "$download_link")
+    if machine_has "curl"
-    if [ $? -ne 0 ]
     then
-      specific_product_version=$(wget -qO- "$download_link")
+        specific_product_version=$(curl -s --fail "$download_link")
-      if [ $? -ne 0 ]
+        if [ $? -ne 0 ]
-      then
+        then
-        specific_product_version=$specific_version
+            specific_product_version=$specific_version
-      fi
+        fi
+    elif machine_has "wget"
+    then
+        specific_product_version=$(wget -qO- "$download_link")
+        if [ $? -ne 0 ]
+        then
+            specific_product_version=$specific_version
+        fi
     fi
     specific_product_version="${specific_product_version//[$'\t\r\n']}"
 
@@ -723,11 +702,31 @@ extract_dotnet_package() {
     find "$temp_out_path" -type f | grep -Ev "$folders_with_version_regex" | copy_files_or_dirs_from_list "$temp_out_path" "$out_path" "$override_non_versioned_files"
 
     rm -rf "$temp_out_path"
+    rm -f "$zip_path" && say_verbose "Temporary zip file $zip_path was removed"
 
     if [ "$failed" = true ]; then
         say_err "Extraction failed"
         return 1
     fi
+    return 0
+}
+
+get_http_header_curl() {
+    eval $invocation
+    local remote_path="$1"
+    remote_path_with_credential="${remote_path}${feed_credential}"
+    curl_options="-I -sSL --retry 5 --retry-delay 2 --connect-timeout 15 "
+    curl $curl_options "$remote_path_with_credential" || return 1
+    return 0
+}
+
+get_http_header_wget() {
+    eval $invocation
+    local remote_path="$1"
+    remote_path_with_credential="${remote_path}${feed_credential}"
+    wget_options="-q -S --spider --tries 5 --waitretry 2 --connect-timeout 15 "
+    wget $wget_options "$remote_path_with_credential" 2>&1 || return 1
+    return 0
 }
 
 # args:
@@ -759,44 +758,56 @@ download() {
     return 0
 }
 
+# Updates global variables $http_code and $download_error_msg
 downloadcurl() {
     eval $invocation
     local remote_path="$1"
     local out_path="${2:-}"
-
     # Append feed_credential as late as possible before calling curl to avoid logging feed_credential
-    remote_path="${remote_path}${feed_credential}"
+    local remote_path_with_credential="${remote_path}${feed_credential}"
-
     local curl_options="--retry 20 --retry-delay 2 --connect-timeout 15 -sSL -f --create-dirs "
     local failed=false
     if [ -z "$out_path" ]; then
-        curl $curl_options "$remote_path" || failed=true
+        curl $curl_options "$remote_path_with_credential" || failed=true
     else
-        curl $curl_options -o "$out_path" "$remote_path" || failed=true
+        curl $curl_options -o "$out_path" "$remote_path_with_credential" || failed=true
     fi
     if [ "$failed" = true ]; then
-        say_verbose "Curl download failed"
+        local response=$(get_http_header_curl $remote_path_with_credential)
+        http_code=$( echo "$response" | awk '/^HTTP/{print $2}' | tail -1 )
+        download_error_msg="Unable to download $remote_path."
+        if  [[ $http_code != 2* ]]; then
+            download_error_msg+=" Returned HTTP status code: $http_code."
+        fi
+        say_verbose "$download_error_msg"
         return 1
     fi
     return 0
 }
 
+
+# Updates global variables $http_code and $download_error_msg
 downloadwget() {
     eval $invocation
     local remote_path="$1"
     local out_path="${2:-}"
-
     # Append feed_credential as late as possible before calling wget to avoid logging feed_credential
-    remote_path="${remote_path}${feed_credential}"
+    local remote_path_with_credential="${remote_path}${feed_credential}"
     local wget_options="--tries 20 --waitretry 2 --connect-timeout 15 "
     local failed=false
     if [ -z "$out_path" ]; then
-        wget -q $wget_options -O - "$remote_path" || failed=true
+        wget -q $wget_options -O - "$remote_path_with_credential" || failed=true
     else
-        wget $wget_options -O "$out_path" "$remote_path" || failed=true
+        wget $wget_options -O "$out_path" "$remote_path_with_credential" || failed=true
     fi
     if [ "$failed" = true ]; then
-        say_verbose "Wget download failed"
+        local response=$(get_http_header_wget $remote_path_with_credential)
+        http_code=$( echo "$response" | awk '/^  HTTP/{print $2}' | tail -1 )
+        download_error_msg="Unable to download $remote_path."
+        if  [[ $http_code != 2* ]]; then
+            download_error_msg+=" Returned HTTP status code: $http_code."
+        fi
+        say_verbose "$download_error_msg"
         return 1
     fi
     return 0
@@ -809,6 +820,9 @@ calculate_vars() {
     normalized_architecture="$(get_normalized_architecture_from_architecture "$architecture")"
     say_verbose "normalized_architecture=$normalized_architecture"
 
+    normalized_os="$(get_normalized_os "$user_defined_os")"
+    say_verbose "normalized_os=$normalized_os"
+
     specific_version="$(get_specific_version_from_version "$azure_feed" "$channel" "$normalized_architecture" "$version" "$json_file")"
     specific_product_version="$(get_specific_product_version "$azure_feed" "$specific_version")"
     say_verbose "specific_version=$specific_version"
@@ -817,7 +831,7 @@ calculate_vars() {
         return 1
     fi
 
-    download_link="$(construct_download_link "$azure_feed" "$channel" "$normalized_architecture" "$specific_version")"
+    download_link="$(construct_download_link "$azure_feed" "$channel" "$normalized_architecture" "$specific_version" "$normalized_os")"
     say_verbose "Constructed primary named payload URL: $download_link"
 
     legacy_download_link="$(construct_legacy_download_link "$azure_feed" "$channel" "$normalized_architecture" "$specific_version")" || valid_legacy_download_link=false
@@ -862,38 +876,76 @@ install_dotnet() {
     zip_path="$(mktemp "$temporary_file_template")"
     say_verbose "Zip path: $zip_path"
 
-    say "Downloading link: $download_link"
 
     # Failures are normal in the non-legacy case for ultimately legacy downloads.
     # Do not output to stderr, since output to stderr is considered an error.
+    say "Downloading primary link $download_link"
+
+    # The download function will set variables $http_code and $download_error_msg in case of failure.
+    http_code=""; download_error_msg=""
     download "$download_link" "$zip_path" 2>&1 || download_failed=true
+    primary_path_http_code="$http_code"; primary_path_download_error_msg="$download_error_msg"
 
     #  if the download fails, download the legacy_download_link
     if [ "$download_failed" = true ]; then
-        say "Cannot download: $download_link"
+        case $primary_path_http_code in
-
+        404)
+            say "The resource at $download_link is not available."
+            ;;
+        *)
+            say "$primary_path_download_error_msg"
+            ;;
+        esac
+        rm -f "$zip_path" 2>&1 && say_verbose "Temporary zip file $zip_path was removed"
         if [ "$valid_legacy_download_link" = true ]; then
             download_failed=false
             download_link="$legacy_download_link"
             zip_path="$(mktemp "$temporary_file_template")"
             say_verbose "Legacy zip path: $zip_path"
-            say "Downloading legacy link: $download_link"
+
+            say "Downloading legacy link $download_link"
+
+            # The download function will set variables $http_code and $download_error_msg in case of failure.
+            http_code=""; download_error_msg=""
             download "$download_link" "$zip_path" 2>&1 || download_failed=true
+            legacy_path_http_code="$http_code";  legacy_path_download_error_msg="$download_error_msg"
 
             if [ "$download_failed" = true ]; then
-                say "Cannot download: $download_link"
+                case $legacy_path_http_code in
+                404)
+                    say "The resource at $download_link is not available."
+                    ;;
+                *)
+                    say "$legacy_path_download_error_msg"
+                    ;;
+                esac
+                rm -f "$zip_path" 2>&1 && say_verbose "Temporary zip file $zip_path was removed"
             fi
         fi
     fi
 
     if [ "$download_failed" = true ]; then
-        say_err "Could not find/download: \`$asset_name\` with version = $specific_version"
+        if [[ "$primary_path_http_code" = "404" && ( "$valid_legacy_download_link" = false || "$legacy_path_http_code" = "404") ]]; then
-        say_err "Refer to: https://aka.ms/dotnet-os-lifecycle for information on .NET Core support"
+            say_err "Could not find \`$asset_name\` with version = $specific_version"
+            say_err "Refer to: https://aka.ms/dotnet-os-lifecycle for information on .NET Core support"
+        else
+            say_err "Could not download: \`$asset_name\` with version = $specific_version"
+            # 404-NotFound is an expected response if it goes from only one of the links, do not show that error.
+            # If primary path is available (not 404-NotFound) then show the primary error else show the legacy error.
+            if [ "$primary_path_http_code" != "404" ]; then
+                say_err "$primary_path_download_error_msg"
+                return 1
+            fi
+            if [[ "$valid_legacy_download_link" = true  && "$legacy_path_http_code" != "404" ]]; then
+                say_err "$legacy_path_download_error_msg"
+                return 1
+            fi
+        fi
         return 1
     fi
 
     say "Extracting zip from $download_link"
-    extract_dotnet_package "$zip_path" "$install_root"
+    extract_dotnet_package "$zip_path" "$install_root" || return 1
 
     #  Check if the SDK version is installed; if not, fail the installation.
     # if the version contains "RTM" or "servicing"; check if a 'release-type' SDK version is installed.
@@ -914,6 +966,8 @@ install_dotnet() {
         return 0
     fi
 
+    # Version verification failed. More likely something is wrong either with the downloaded content or with the verification algorithm.
+    say_err "Failed to verify the version of installed \`$asset_name\`.\nInstallation source: $download_link.\nInstallation location: $install_root.\nReport the bug at https://github.com/dotnet/install-scripts/issues."
     say_err "\`$asset_name\` with version = $specific_product_version failed to install with an unknown error."
     return 1
 }
@@ -940,6 +994,7 @@ runtime=""
 runtime_id=""
 override_non_versioned_files=true
 non_dynamic_parameters=""
+user_defined_os=""
 
 while [ $# -ne 0 ]
 do
@@ -961,6 +1016,10 @@ do
             shift
             architecture="$1"
             ;;
+        --os|-[Oo][SS])
+            shift
+            user_defined_os="$1"
+            ;;
         --shared-runtime|-[Ss]hared[Rr]untime)
             say_warning "The --shared-runtime flag is obsolete and may be removed in a future version of this script. The recommended usage is to specify '--runtime dotnet'."
             if [ -z "$runtime" ]; then
@@ -1012,6 +1071,7 @@ do
             shift
             runtime_id="$1"
             non_dynamic_parameters+=" $name "\""$1"\"""
+            say_warning "Use of --runtime-id is obsolete and should be limited to the versions below 2.1. To override architecture, use --architecture option instead. To override OS, use --os option instead."
             ;;
         --jsonfile|-[Jj][Ss]on[Ff]ile)
             shift
@@ -1044,8 +1104,6 @@ do
             echo "      -Version"
             echo "          Possible values:"
             echo "          - latest - most latest build on specific channel"
-            echo "          - coherent - most latest coherent build on specific channel"
-            echo "              coherent applies only to SDK downloads"
             echo "          - 3-part version in a format A.B.C - represents specific version of build"
             echo "              examples: 2.0.0-preview2-006120; 1.1.0"
             echo "  -i,--install-dir <DIR>             Install under specified location (see Install Location below)"
@@ -1053,6 +1111,11 @@ do
             echo "  --architecture <ARCHITECTURE>      Architecture of dotnet binaries to be installed, Defaults to \`$architecture\`."
             echo "      --arch,-Architecture,-Arch"
             echo "          Possible values: x64, arm, and arm64"
+            echo "  --os <system>                    Specifies operating system to be used when selecting the installer."
+            echo "          Overrides the OS determination approach used by the script. Supported values: osx, linux, linux-musl, freebsd, rhel.6."  
+            echo "          In case any other value is provided, the platform will be determined by the script based on machine configuration."       
+            echo "          Not supported for legacy links. Use --runtime-id to specify platform for legacy links."
+            echo "          Refer to: https://aka.ms/dotnet-os-lifecycle for more information."                 
             echo "  --runtime <RUNTIME>                Installs a shared runtime only, without the SDK."
             echo "      -Runtime"
             echo "          Possible values:"
@@ -1069,14 +1132,15 @@ do
             echo "  --no-cdn,-NoCdn                    Disable downloading from the Azure CDN, and use the uncached feed directly."
             echo "  --jsonfile <JSONFILE>              Determines the SDK version from a user specified global.json file."
             echo "                                     Note: global.json must have a value for 'SDK:Version'"
-            echo "  --runtime-id                       Installs the .NET Tools for the given platform (use linux-x64 for portable linux)."
-            echo "      -RuntimeId"
             echo "  -?,--?,-h,--help,-Help             Shows this help message"
             echo ""
             echo "Obsolete parameters:"
             echo "  --shared-runtime                   The recommended alternative is '--runtime dotnet'."
             echo "                                     This parameter is obsolete and may be removed in a future version of this script."
             echo "                                     Installs just the shared runtime bits, not the entire SDK."
+            echo "  --runtime-id                       Installs the .NET Tools for the given platform (use linux-x64 for portable linux)."
+            echo "      -RuntimeId"                    The parameter is obsolete and may be removed in a future version of this script. Should be used only for versions below 2.1.
+            echo "                                     For primary links to override OS or/and architecture, use --os and --architecture option instead." 
             echo ""
             echo "Install Location:"
             echo "  Location is chosen in following order:"
@@ -1098,6 +1162,11 @@ if [ "$no_cdn" = true ]; then
     azure_feed="$uncached_feed"
 fi
 
+say "Note that the intended use of this script is for Continuous Integration (CI) scenarios, where:"
+say "- The SDK needs to be installed without user interaction and without admin rights."
+say "- The SDK installation doesn't need to persist across multiple CI runs."
+say "To set up a development environment or to run apps, use installers rather than this script. Visit https://dotnet.microsoft.com/download to get the installer.\n"
+
 check_min_reqs
 calculate_vars
 script_name=$(basename "$0")
@@ -1108,7 +1177,7 @@ if [ "$dry_run" = true ]; then
     if [ "$valid_legacy_download_link" = true ]; then
         say "Legacy named payload URL: $legacy_download_link"
     fi
-    repeatable_command="./$script_name --version "\""$specific_version"\"" --install-dir "\""$install_root"\"" --architecture "\""$normalized_architecture"\"""
+    repeatable_command="./$script_name --version "\""$specific_version"\"" --install-dir "\""$install_root"\"" --architecture "\""$normalized_architecture"\"" --os "\""$normalized_os"\""" 
     if [[ "$runtime" == "dotnet" ]]; then
         repeatable_command+=" --runtime "\""dotnet"\"""
     elif [[ "$runtime" == "aspnetcore" ]]; then
@@ -1119,7 +1188,6 @@ if [ "$dry_run" = true ]; then
     exit 0
 fi
 
-check_pre_reqs
 install_dotnet
 
 bin_path="$(get_absolute_path "$(combine_paths "$install_root" "$bin_folder_relative_path")")"
@@ -1130,4 +1198,6 @@ else
     say "Binaries of dotnet can be found in $bin_path"
 fi
 
+say "Note that the script does not resolve dependencies during installation."
+say "To check the list of dependencies, go to https://docs.microsoft.com/dotnet/core/install, select your operating system and check the \"Dependencies\" section."
 say "Installation finished successfully."

src/Misc/layoutbin/checkScripts/downloadCert.js

@@ -0,0 +1,115 @@
+const https = require('https')
+const fs = require('fs')
+const http = require('http')
+const hostname = process.env['HOSTNAME'] || ''
+const port = process.env['PORT'] || ''
+const path = process.env['PATH'] || ''
+const pat = process.env['PAT'] || ''
+const proxyHost = process.env['PROXYHOST'] || ''
+const proxyPort = process.env['PROXYPORT'] || ''
+const proxyUsername = process.env['PROXYUSERNAME'] || ''
+const proxyPassword = process.env['PROXYPASSWORD'] || ''
+
+process.env['NODE_TLS_REJECT_UNAUTHORIZED'] = '0'
+
+if (proxyHost === '') {
+    const options = {
+        hostname: hostname,
+        port: port,
+        path: path,
+        method: 'GET',
+        headers: {
+            'User-Agent': 'GitHubActionsRunnerCheck/1.0',
+            'Authorization': `token ${pat}`
+        },
+    }
+    const req = https.request(options, res => {
+        console.log(`statusCode: ${res.statusCode}`)
+        console.log(`headers: ${JSON.stringify(res.headers)}`)
+        let cert = socket.getPeerCertificate(true)
+        let certPEM = ''
+        let fingerprints = {}
+        while (cert != null && fingerprints[cert.fingerprint] != '1') {
+            fingerprints[cert.fingerprint] = '1'
+            certPEM = certPEM + '-----BEGIN CERTIFICATE-----\n'
+            let certEncoded = cert.raw.toString('base64')
+            for (let i = 0; i < certEncoded.length; i++) {
+                certPEM = certPEM + certEncoded[i]
+                if (i != certEncoded.length - 1 && (i + 1) % 64 == 0) {
+                    certPEM = certPEM + '\n'
+                }
+            }
+            certPEM = certPEM + '\n-----END CERTIFICATE-----\n'
+            cert = cert.issuerCertificate
+        }
+        console.log(certPEM)
+        fs.writeFileSync('./download_ca_cert.pem', certPEM)
+        res.on('data', d => {
+            process.stdout.write(d)
+        })
+    })
+    req.on('error', error => {
+        console.error(error)
+    })
+    req.end()
+}
+else {
+    const auth = 'Basic ' + Buffer.from(proxyUsername + ':' + proxyPassword).toString('base64')
+
+    const options = {
+        host: proxyHost,
+        port: proxyPort,
+        method: 'CONNECT',
+        path: `${hostname}:${port}`,
+    }
+
+    if (proxyUsername != '' || proxyPassword != '') {
+        options.headers = {
+            'Proxy-Authorization': auth,
+        }
+    }
+
+    http.request(options).on('connect', (res, socket) => {
+        if (res.statusCode != 200) {
+            throw new Error(`Proxy returns code: ${res.statusCode}`)
+        }
+
+        https.get({
+            host: hostname,
+            port: port,
+            socket: socket,
+            agent: false,
+            path: '/',
+            headers: {
+                'User-Agent': 'GitHubActionsRunnerCheck/1.0',
+                'Authorization': `token ${pat}`
+            }
+        }, (res) => {
+            let cert = res.socket.getPeerCertificate(true)
+            let certPEM = ''
+            let fingerprints = {}
+            while (cert != null && fingerprints[cert.fingerprint] != '1') {
+                fingerprints[cert.fingerprint] = '1'
+                certPEM = certPEM + '-----BEGIN CERTIFICATE-----\n'
+                let certEncoded = cert.raw.toString('base64')
+                for (let i = 0; i < certEncoded.length; i++) {
+                    certPEM = certPEM + certEncoded[i]
+                    if (i != certEncoded.length - 1 && (i + 1) % 64 == 0) {
+                        certPEM = certPEM + '\n'
+                    }
+                }
+                certPEM = certPEM + '\n-----END CERTIFICATE-----\n'
+                cert = cert.issuerCertificate
+            }
+            console.log(certPEM)
+            fs.writeFileSync('./download_ca_cert.pem', certPEM)
+            console.log(`statusCode: ${res.statusCode}`)
+            console.log(`headers: ${JSON.stringify(res.headers)}`)
+            res.on('data', d => {
+                process.stdout.write(d)
+            })
+        })
+    }).on('error', (err) => {
+        console.error('error', err)
+    }).end()
+}

src/Misc/layoutbin/checkScripts/makeWebRequest.js

@@ -0,0 +1,75 @@
+const https = require('https')
+const http = require('http')
+const hostname = process.env['HOSTNAME'] || ''
+const port = process.env['PORT'] || ''
+const path = process.env['PATH'] || ''
+const pat = process.env['PAT'] || ''
+const proxyHost = process.env['PROXYHOST'] || ''
+const proxyPort = process.env['PROXYPORT'] || ''
+const proxyUsername = process.env['PROXYUSERNAME'] || ''
+const proxyPassword = process.env['PROXYPASSWORD'] || ''
+
+if (proxyHost === '') {
+    const options = {
+        hostname: hostname,
+        port: port,
+        path: path,
+        method: 'GET',
+        headers: {
+            'User-Agent': 'GitHubActionsRunnerCheck/1.0',
+            'Authorization': `token ${pat}`,
+        }
+    }
+    const req = https.request(options, res => {
+        console.log(`statusCode: ${res.statusCode}`)
+        console.log(`headers: ${JSON.stringify(res.headers)}`)
+
+        res.on('data', d => {
+            process.stdout.write(d)
+        })
+    })
+    req.on('error', error => {
+        console.error(error)
+    })
+    req.end()
+}
+else {
+    const proxyAuth = 'Basic ' + Buffer.from(proxyUsername + ':' + proxyPassword).toString('base64')
+    const options = {
+        hostname: proxyHost,
+        port: proxyPort,
+        method: 'CONNECT',
+        path: `${hostname}:${port}`
+    }
+
+    if (proxyUsername != '' || proxyPassword != '') {
+        options.headers = {
+            'Proxy-Authorization': proxyAuth,
+        }
+    }
+    http.request(options).on('connect', (res, socket) => {
+        if (res.statusCode != 200) {
+            throw new Error(`Proxy returns code: ${res.statusCode}`)
+        }
+        https.get({
+            host: hostname,
+            port: port,
+            socket: socket,
+            agent: false,
+            path: path,
+            headers: {
+                'User-Agent': 'GitHubActionsRunnerCheck/1.0',
+                'Authorization': `token ${pat}`,
+            }
+        }, (res) => {
+            console.log(`statusCode: ${res.statusCode}`)
+            console.log(`headers: ${JSON.stringify(res.headers)}`)
+
+            res.on('data', d => {
+                process.stdout.write(d)
+            })
+        })
+    }).on('error', (err) => {
+        console.error('error', err)
+    }).end()
+}

src/Misc/layoutbin/installdependencies.sh

@@ -14,14 +14,14 @@ fi
 
 function print_errormessage() 
 {
-    echo "Can't install dotnet core dependencies."
+    echo "Can't install dotnet 5 dependencies."
     echo "You can manually install all required dependencies based on following documentation"
     echo "https://docs.microsoft.com/en-us/dotnet/core/linux-prerequisites?tabs=netcore2x"
 }
 
 function print_rhel6message() 
 {
-    echo "We did our best effort to install dotnet core dependencies"
+    echo "We did our best effort to install dotnet 5 dependencies"
     echo "However, there are some dependencies which require manual installation" 
     echo "You can install all remaining required dependencies based on the following documentation"
     echo "https://github.com/dotnet/core/blob/master/Documentation/build-and-install-rhel6-prerequisites.md"
@@ -29,7 +29,7 @@ function print_rhel6message()
 
 function print_rhel6errormessage() 
 {
-    echo "We couldn't install dotnet core dependencies"
+    echo "We couldn't install dotnet 5 dependencies"
     echo "You can manually install all required dependencies based on following documentation"
     echo "https://docs.microsoft.com/en-us/dotnet/core/linux-prerequisites?tabs=netcore2x"
     echo "In addition, there are some dependencies which require manual installation. Please follow this documentation" 

src/Misc/layoutroot/config.sh

@@ -8,7 +8,7 @@ if [ $user_id -eq 0 -a -z "$RUNNER_ALLOW_RUNASROOT" ]; then
     exit 1
 fi
 
-# Check dotnet core 3.0 dependencies for Linux
+# Check dotnet 5 dependencies for Linux
 if [[ (`uname` == "Linux") ]]
 then
     command -v ldd > /dev/null
@@ -18,25 +18,25 @@ then
         exit 1
     fi
 
-    message="Execute sudo ./bin/installdependencies.sh to install any missing Dotnet Core 3.0 dependencies."
+    message="Execute sudo ./bin/installdependencies.sh to install any missing Dotnet 5 dependencies."
 
     ldd ./bin/libcoreclr.so | grep 'not found'
     if [ $? -eq 0 ]; then
-        echo "Dependencies is missing for Dotnet Core 3.0"
+        echo "Dependencies is missing for Dotnet 5"
         echo $message
         exit 1
     fi
 
-    ldd ./bin/System.Security.Cryptography.Native.OpenSsl.so | grep 'not found'
+    ldd ./bin/libSystem.Security.Cryptography.Native.OpenSsl.so | grep 'not found'
     if [ $? -eq 0 ]; then
-        echo "Dependencies is missing for Dotnet Core 3.0"
+        echo "Dependencies is missing for Dotnet 5"
         echo $message
         exit 1
     fi
 
-    ldd ./bin/System.IO.Compression.Native.so | grep 'not found'
+    ldd ./bin/libSystem.IO.Compression.Native.so | grep 'not found'
     if [ $? -eq 0 ]; then
-        echo "Dependencies is missing for Dotnet Core 3.0"
+        echo "Dependencies is missing for Dotnet 5"
         echo $message
         exit 1
     fi
@@ -54,7 +54,7 @@ then
     libpath=${LD_LIBRARY_PATH:-}
     $LDCONFIG_COMMAND -NXv ${libpath//:/ } 2>&1 | grep libicu >/dev/null 2>&1
     if [ $? -ne 0 ]; then
-        echo "Libicu's dependencies is missing for Dotnet Core 3.0"
+        echo "Libicu's dependencies is missing for Dotnet 5"
         echo $message
         exit 1
     fi

src/Misc/layoutroot/env.sh

@@ -6,6 +6,7 @@ varCheckList=(
     'ANT_HOME' 
     'M2_HOME' 
     'ANDROID_HOME' 
+    'ANDROID_SDK_ROOT'
     'GRADLE_HOME' 
     'NVM_BIN' 
     'NVM_PATH'

src/Runner.Common/Constants.cs

@@ -99,9 +99,11 @@ namespace GitHub.Runner.Common
 
                     // Secret args. Must be added to the "Secrets" getter as well.
                     public static readonly string Token = "token";
+                    public static readonly string PAT = "pat";
                     public static readonly string WindowsLogonPassword = "windowslogonpassword";
                     public static string[] Secrets => new[]
                     {
+                        PAT,
                         Token,
                         WindowsLogonPassword,
                     };
@@ -119,6 +121,7 @@ namespace GitHub.Runner.Common
                 //validFlags array as well present in the CommandSettings.cs
                 public static class Flags
                 {
+                    public static readonly string Check = "check";
                     public static readonly string Commit = "commit";
                     public static readonly string Help = "help";
                     public static readonly string Replace = "replace";
@@ -138,10 +141,15 @@ namespace GitHub.Runner.Common
                 public const int RunOnceRunnerUpdating = 4;
             }
 
+            public static class Features
+            {
+                public static readonly string DiskSpaceWarning = "runner.diskspace.warning";
+            }
+
             public static readonly string InternalTelemetryIssueDataKey = "_internal_telemetry";
             public static readonly string WorkerCrash = "WORKER_CRASH";
+            public static readonly string LowDiskSpace = "LOW_DISK_SPACE";
             public static readonly string UnsupportedCommand = "UNSUPPORTED_COMMAND";
-            public static readonly string UnsupportedCommandMessage = "The `{0}` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2020-10-01-github-actions-deprecating-set-env-and-add-path-commands/";
             public static readonly string UnsupportedCommandMessageDisabled = "The `{0}` command is disabled. Please upgrade to using Environment Files or opt into unsecure command execution by setting the `ACTIONS_ALLOW_UNSECURE_COMMANDS` environment variable to `true`. For more information see: https://github.blog/changelog/2020-10-01-github-actions-deprecating-set-env-and-add-path-commands/";
         }
 

src/Runner.Common/ExtensionManager.cs

@@ -60,6 +60,12 @@ namespace GitHub.Runner.Common
                     Add<T>(extensions, "GitHub.Runner.Worker.AddPathFileCommand, Runner.Worker");
                     Add<T>(extensions, "GitHub.Runner.Worker.SetEnvFileCommand, Runner.Worker");
                     break;
+                case "GitHub.Runner.Listener.Check.ICheckExtension":
+                    Add<T>(extensions, "GitHub.Runner.Listener.Check.InternetCheck, Runner.Listener");
+                    Add<T>(extensions, "GitHub.Runner.Listener.Check.ActionsCheck, Runner.Listener");
+                    Add<T>(extensions, "GitHub.Runner.Listener.Check.GitCheck, Runner.Listener");
+                    Add<T>(extensions, "GitHub.Runner.Listener.Check.NodeJsCheck, Runner.Listener");
+                    break;
                 default:
                     // This should never happen.
                     throw new NotSupportedException($"Unexpected extension type: '{typeof(T).FullName}'");

src/Runner.Listener/Checks/ActionsCheck.cs

@@ -0,0 +1,90 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Threading.Tasks;
+using GitHub.Runner.Common;
+using GitHub.Runner.Sdk;
+
+namespace GitHub.Runner.Listener.Check
+{
+    public sealed class ActionsCheck : RunnerService, ICheckExtension
+    {
+        private string _logFile = null;
+
+        public int Order => 2;
+
+        public string CheckName => "GitHub Actions Connection";
+
+        public string CheckDescription => "Make sure the actions runner have access to the GitHub Actions Service.";
+
+        public string CheckLog => _logFile;
+
+        public string HelpLink => "https://github.com/actions/runner/blob/main/docs/checks/actions.md";
+
+        public Type ExtensionType => typeof(ICheckExtension);
+
+        public override void Initialize(IHostContext hostContext)
+        {
+            base.Initialize(hostContext);
+            _logFile = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Diag), StringUtil.Format("{0}_{1:yyyyMMdd-HHmmss}-utc.log", nameof(ActionsCheck), DateTime.UtcNow));
+        }
+
+        // runner access to actions service
+        public async Task<bool> RunCheck(string url, string pat)
+        {
+            await File.AppendAllLinesAsync(_logFile, HostContext.WarnLog());
+            await File.AppendAllLinesAsync(_logFile, HostContext.CheckProxy());
+
+            var checkTasks = new List<Task<CheckResult>>();
+            string githubApiUrl = null;
+            string actionsTokenServiceUrl = null;
+            string actionsPipelinesServiceUrl = null;
+            var urlBuilder = new UriBuilder(url);
+            if (UrlUtil.IsHostedServer(urlBuilder))
+            {
+                urlBuilder.Host = $"api.{urlBuilder.Host}";
+                urlBuilder.Path = "";
+                githubApiUrl = urlBuilder.Uri.AbsoluteUri;
+                actionsTokenServiceUrl = "https://vstoken.actions.githubusercontent.com/_apis/health";
+                actionsPipelinesServiceUrl = "https://pipelines.actions.githubusercontent.com/_apis/health";
+            }
+            else
+            {
+                urlBuilder.Path = "api/v3";
+                githubApiUrl = urlBuilder.Uri.AbsoluteUri;
+                urlBuilder.Path = "_services/vstoken/_apis/health";
+                actionsTokenServiceUrl = urlBuilder.Uri.AbsoluteUri;
+                urlBuilder.Path = "_services/pipelines/_apis/health";
+                actionsPipelinesServiceUrl = urlBuilder.Uri.AbsoluteUri;
+            }
+
+            // check github api
+            checkTasks.Add(CheckUtil.CheckDns(githubApiUrl));
+            checkTasks.Add(CheckUtil.CheckPing(githubApiUrl));
+            checkTasks.Add(HostContext.CheckHttpsRequests(githubApiUrl, pat, expectedHeader: "X-GitHub-Request-Id"));
+
+            // check actions token service
+            checkTasks.Add(CheckUtil.CheckDns(actionsTokenServiceUrl));
+            checkTasks.Add(CheckUtil.CheckPing(actionsTokenServiceUrl));
+            checkTasks.Add(HostContext.CheckHttpsRequests(actionsTokenServiceUrl, pat, expectedHeader: "x-vss-e2eid"));
+
+            // check actions pipelines service
+            checkTasks.Add(CheckUtil.CheckDns(actionsPipelinesServiceUrl));
+            checkTasks.Add(CheckUtil.CheckPing(actionsPipelinesServiceUrl));
+            checkTasks.Add(HostContext.CheckHttpsRequests(actionsPipelinesServiceUrl, pat, expectedHeader: "x-vss-e2eid"));
+
+            var result = true;
+            while (checkTasks.Count > 0)
+            {
+                var finishedCheckTask = await Task.WhenAny<CheckResult>(checkTasks);
+                var finishedCheck = await finishedCheckTask;
+                result = result && finishedCheck.Pass;
+                await File.AppendAllLinesAsync(_logFile, finishedCheck.Logs);
+                checkTasks.Remove(finishedCheckTask);
+            }
+
+            await Task.WhenAll(checkTasks);
+            return result;
+        }
+    }
+}

src/Runner.Listener/Checks/CheckUtil.cs

@@ -0,0 +1,351 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics.Tracing;
+using System.IO;
+using System.Linq;
+using System.Net;
+using System.Net.Http;
+using System.Net.Http.Headers;
+using System.Net.NetworkInformation;
+using System.Threading;
+using System.Threading.Tasks;
+using GitHub.Runner.Common;
+using GitHub.Runner.Sdk;
+using GitHub.Services.Common;
+
+namespace GitHub.Runner.Listener.Check
+{
+    public static class CheckUtil
+    {
+        public static List<string> WarnLog(this IHostContext hostContext)
+        {
+            var logs = new List<string>();
+            logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+            logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+            logs.Add($"{DateTime.UtcNow.ToString("O")} ****     !!! WARNING !!! ");
+            logs.Add($"{DateTime.UtcNow.ToString("O")} ****     DO NOT share the log in public place! The log may contains secrets in plain text. ");
+            logs.Add($"{DateTime.UtcNow.ToString("O")} ****     !!! WARNING !!! ");
+            logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+            logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+            return logs;
+        }
+
+        public static List<string> CheckProxy(this IHostContext hostContext)
+        {
+            var logs = new List<string>();
+            if (!string.IsNullOrEmpty(hostContext.WebProxy.HttpProxyAddress) ||
+                !string.IsNullOrEmpty(hostContext.WebProxy.HttpsProxyAddress))
+            {
+                logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                logs.Add($"{DateTime.UtcNow.ToString("O")} ****     Runner is behind web proxy {hostContext.WebProxy.HttpsProxyAddress ?? hostContext.WebProxy.HttpProxyAddress} ");
+                logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+            }
+
+            return logs;
+        }
+
+        public static async Task<CheckResult> CheckDns(string targetUrl)
+        {
+            var result = new CheckResult();
+            var url = new Uri(targetUrl);
+            try
+            {
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****     Try DNS lookup for {url.Host} ");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                IPHostEntry host = await Dns.GetHostEntryAsync(url.Host);
+                foreach (var address in host.AddressList)
+                {
+                    result.Logs.Add($"{DateTime.UtcNow.ToString("O")} Resolved DNS for {url.Host} to '{address}'");
+                }
+
+                result.Pass = true;
+            }
+            catch (Exception ex)
+            {
+                result.Pass = false;
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****     Resolved DNS for {url.Host} failed with error: {ex}");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+            }
+
+            return result;
+        }
+
+        public static async Task<CheckResult> CheckPing(string targetUrl)
+        {
+            var result = new CheckResult();
+            var url = new Uri(targetUrl);
+            try
+            {
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****     Try ping {url.Host} ");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                using (var ping = new Ping())
+                {
+                    var reply = await ping.SendPingAsync(url.Host);
+                    if (reply.Status == IPStatus.Success)
+                    {
+                        result.Pass = true;
+                        result.Logs.Add($"{DateTime.UtcNow.ToString("O")} Ping {url.Host} ({reply.Address}) succeed within to '{reply.RoundtripTime} ms'");
+                    }
+                    else
+                    {
+                        result.Pass = false;
+                        result.Logs.Add($"{DateTime.UtcNow.ToString("O")} Ping {url.Host} ({reply.Address}) failed with '{reply.Status}'");
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                result.Pass = false;
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****     Ping api.github.com failed with error: {ex}");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+            }
+
+            return result;
+        }
+
+        public static async Task<CheckResult> CheckHttpsRequests(this IHostContext hostContext, string url, string pat, string expectedHeader)
+        {
+            var result = new CheckResult();
+            try
+            {
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****     Send HTTPS Request to {url} ");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                using (var _ = new HttpEventSourceListener(result.Logs))
+                using (var httpClientHandler = hostContext.CreateHttpClientHandler())
+                using (var httpClient = new HttpClient(httpClientHandler))
+                {
+                    httpClient.DefaultRequestHeaders.UserAgent.AddRange(hostContext.UserAgents);
+                    if (!string.IsNullOrEmpty(pat))
+                    {
+                        httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("token", pat);
+                    }
+
+                    var response = await httpClient.GetAsync(url);
+
+                    result.Logs.Add($"{DateTime.UtcNow.ToString("O")} Http status code: {response.StatusCode}");
+                    result.Logs.Add($"{DateTime.UtcNow.ToString("O")} Http response headers: {response.Headers}");
+
+                    var responseContent = await response.Content.ReadAsStringAsync();
+                    result.Logs.Add($"{DateTime.UtcNow.ToString("O")} Http response body: {responseContent}");
+                    if (response.IsSuccessStatusCode)
+                    {
+                        if (response.Headers.Contains(expectedHeader))
+                        {
+                            result.Pass = true;
+                            result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                            result.Logs.Add($"{DateTime.UtcNow.ToString("O")} Http request 'GET' to {url} succeed");
+                            result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                            result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ");
+                            result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ");
+                        }
+                        else
+                        {
+                            result.Pass = false;
+                            result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                            result.Logs.Add($"{DateTime.UtcNow.ToString("O")} Http request 'GET' to {url} succeed but doesn't have expected HTTP Header.");
+                            result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                            result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ");
+                            result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ");
+                        }
+                    }
+                    else
+                    {
+                        result.Pass = false;
+                        result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                        result.Logs.Add($"{DateTime.UtcNow.ToString("O")} Http request 'GET' to {url} failed with {response.StatusCode}");
+                        result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                        result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ");
+                        result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ");
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                result.Pass = false;
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****     Https request 'GET' to {url} failed with error: {ex}");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+            }
+
+            return result;
+        }
+
+        public static async Task<CheckResult> DownloadExtraCA(this IHostContext hostContext, string url, string pat)
+        {
+            var result = new CheckResult();
+            try
+            {
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****     Download SSL Certificate from {url} ");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+
+                var uri = new Uri(url);
+                var env = new Dictionary<string, string>()
+                {
+                    { "HOSTNAME", uri.Host },
+                    { "PORT", uri.IsDefaultPort ? (uri.Scheme.ToLowerInvariant() == "https" ? "443" : "80") : uri.Port.ToString() },
+                    { "PATH", uri.AbsolutePath },
+                    { "PAT", pat }
+                };
+
+                var proxy = hostContext.WebProxy.GetProxy(uri);
+                if (proxy != null)
+                {
+                    env["PROXYHOST"] = proxy.Host;
+                    env["PROXYPORT"] = proxy.IsDefaultPort ? (proxy.Scheme.ToLowerInvariant() == "https" ? "443" : "80") : proxy.Port.ToString();
+                    if (hostContext.WebProxy.HttpProxyUsername != null ||
+                        hostContext.WebProxy.HttpsProxyUsername != null)
+                    {
+                        env["PROXYUSERNAME"] = hostContext.WebProxy.HttpProxyUsername ?? hostContext.WebProxy.HttpsProxyUsername;
+                        env["PROXYPASSWORD"] = hostContext.WebProxy.HttpProxyPassword ?? hostContext.WebProxy.HttpsProxyPassword;
+                    }
+                    else
+                    {
+                        env["PROXYUSERNAME"] = "";
+                        env["PROXYPASSWORD"] = "";
+                    }
+                }
+                else
+                {
+                    env["PROXYHOST"] = "";
+                    env["PROXYPORT"] = "";
+                    env["PROXYUSERNAME"] = "";
+                    env["PROXYPASSWORD"] = "";
+                }
+
+                using (var processInvoker = hostContext.CreateService<IProcessInvoker>())
+                {
+                    processInvoker.OutputDataReceived += new EventHandler<ProcessDataReceivedEventArgs>((sender, args) =>
+                    {
+                        if (!string.IsNullOrEmpty(args.Data))
+                        {
+                            result.Logs.Add($"{DateTime.UtcNow.ToString("O")} [STDOUT] {args.Data}");
+                        }
+                    });
+
+                    processInvoker.ErrorDataReceived += new EventHandler<ProcessDataReceivedEventArgs>((sender, args) =>
+                    {
+                        if (!string.IsNullOrEmpty(args.Data))
+                        {
+                            result.Logs.Add($"{DateTime.UtcNow.ToString("O")} [STDERR] {args.Data}");
+                        }
+                    });
+
+                    var downloadCertScript = Path.Combine(hostContext.GetDirectory(WellKnownDirectory.Bin), "checkScripts", "downloadCert");
+                    var node12 = Path.Combine(hostContext.GetDirectory(WellKnownDirectory.Externals), "node12", "bin", $"node{IOUtil.ExeExtension}");
+                    result.Logs.Add($"{DateTime.UtcNow.ToString("O")} Run '{node12} \"{downloadCertScript}\"' ");
+                    result.Logs.Add($"{DateTime.UtcNow.ToString("O")} {StringUtil.ConvertToJson(env)}");
+                    await processInvoker.ExecuteAsync(
+                        hostContext.GetDirectory(WellKnownDirectory.Root),
+                        node12,
+                        $"\"{downloadCertScript}\"",
+                        env,
+                        true,
+                        CancellationToken.None);
+                }
+
+                result.Pass = true;
+            }
+            catch (Exception ex)
+            {
+                result.Pass = false;
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****     Download SSL Certificate from '{url}' failed with error: {ex}");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+            }
+
+            return result;
+        }
+    }
+
+    // EventSource listener for dotnet debug trace for HTTP and SSL
+    public sealed class HttpEventSourceListener : EventListener
+    {
+        private readonly List<string> _logs;
+        private readonly object _lock = new object();
+        private readonly Dictionary<string, HashSet<string>> _ignoredEvent = new Dictionary<string, HashSet<string>>
+        {
+            {
+                "Private.InternalDiagnostics.System.Net.Http",
+                new HashSet<string>
+                {
+                    "Info",
+                    "Associate"
+                }
+            },
+            {
+                "Private.InternalDiagnostics.System.Net.Security",
+                new HashSet<string>
+                {
+                    "Info",
+                    "SslStreamCtor",
+                    "SecureChannelCtor",
+                    "NoDelegateNoClientCert",
+                    "CertsAfterFiltering",
+                    "UsingCachedCredential",
+                    "SspiSelectedCipherSuite"
+                }
+            }
+        };
+
+        public HttpEventSourceListener(List<string> logs)
+        {
+            _logs = logs;
+            if (Environment.GetEnvironmentVariable("ACTIONS_RUNNER_TRACE_ALL_HTTP_EVENT") == "1")
+            {
+                _ignoredEvent.Clear();
+            }
+        }
+
+        protected override void OnEventSourceCreated(EventSource eventSource)
+        {
+            base.OnEventSourceCreated(eventSource);
+
+            if (eventSource.Name == "Private.InternalDiagnostics.System.Net.Http" ||
+                eventSource.Name == "Private.InternalDiagnostics.System.Net.Security")
+            {
+                EnableEvents(eventSource, EventLevel.Verbose, EventKeywords.All);
+            }
+        }
+
+        protected override void OnEventWritten(EventWrittenEventArgs eventData)
+        {
+            base.OnEventWritten(eventData);
+            lock (_lock)
+            {
+                if (_ignoredEvent.TryGetValue(eventData.EventSource.Name, out var ignored) &&
+                    ignored.Contains(eventData.EventName))
+                {
+                    return;
+                }
+
+                _logs.Add($"{DateTime.UtcNow.ToString("O")} [START {eventData.EventSource.Name} - {eventData.EventName}]");
+                _logs.AddRange(eventData.Payload.Select(x => string.Join(Environment.NewLine, x.ToString().Split(Environment.NewLine).Select(y => $"{DateTime.UtcNow.ToString("O")} {y}"))));
+                _logs.Add($"{DateTime.UtcNow.ToString("O")} [END {eventData.EventSource.Name} - {eventData.EventName}]");
+            }
+        }
+    }
+}

src/Runner.Listener/Checks/GitCheck.cs

@@ -0,0 +1,171 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Net;
+using System.Threading;
+using System.Threading.Tasks;
+using GitHub.Runner.Common;
+using GitHub.Runner.Sdk;
+
+namespace GitHub.Runner.Listener.Check
+{
+    public sealed class GitCheck : RunnerService, ICheckExtension
+    {
+        private string _logFile = null;
+        private string _gitPath = null;
+
+        public int Order => 3;
+
+        public string CheckName => "Git Certificate/Proxy Validation";
+
+        public string CheckDescription => "Make sure the git cli can access to GitHub.com or the GitHub Enterprise Server.";
+
+        public string CheckLog => _logFile;
+
+        public string HelpLink => "https://github.com/actions/runner/blob/main/docs/checks/git.md";
+
+        public Type ExtensionType => typeof(ICheckExtension);
+
+        public override void Initialize(IHostContext hostContext)
+        {
+            base.Initialize(hostContext);
+            _logFile = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Diag), StringUtil.Format("{0}_{1:yyyyMMdd-HHmmss}-utc.log", nameof(GitCheck), DateTime.UtcNow));
+            _gitPath = WhichUtil.Which("git");
+        }
+
+        // git access to ghes/gh 
+        public async Task<bool> RunCheck(string url, string pat)
+        {
+            await File.AppendAllLinesAsync(_logFile, HostContext.WarnLog());
+            await File.AppendAllLinesAsync(_logFile, HostContext.CheckProxy());
+
+            if (string.IsNullOrEmpty(_gitPath))
+            {
+                await File.AppendAllLinesAsync(_logFile, new[] { $"{DateTime.UtcNow.ToString("O")} Can't verify git with GitHub.com or GitHub Enterprise Server since git is not installed." });
+                return false;
+            }
+
+            var checkGit = await CheckGit(url, pat);
+            var result = checkGit.Pass;
+            await File.AppendAllLinesAsync(_logFile, checkGit.Logs);
+
+            // try fix SSL error by providing extra CA certificate.
+            if (checkGit.SslError)
+            {
+                await File.AppendAllLinesAsync(_logFile, new[] { $"{DateTime.UtcNow.ToString("O")} Try fix SSL error by providing extra CA certificate." });
+                var downloadCert = await HostContext.DownloadExtraCA(url, pat);
+                await File.AppendAllLinesAsync(_logFile, downloadCert.Logs);
+
+                if (downloadCert.Pass)
+                {
+                    var recheckGit = await CheckGit(url, pat, extraCA: true);
+                    await File.AppendAllLinesAsync(_logFile, recheckGit.Logs);
+                    if (recheckGit.Pass)
+                    {
+                        await File.AppendAllLinesAsync(_logFile, new[] { $"{DateTime.UtcNow.ToString("O")} Fixed SSL error by providing extra CA certs." });
+                    }
+                }
+            }
+
+            return result;
+        }
+
+        private async Task<CheckResult> CheckGit(string url, string pat, bool extraCA = false)
+        {
+            var result = new CheckResult();
+            try
+            {
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****     Validate server cert and proxy configuration with Git ");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                var repoUrlBuilder = new UriBuilder(url);
+                repoUrlBuilder.Path = "actions/checkout";
+                repoUrlBuilder.UserName = "gh";
+                repoUrlBuilder.Password = pat;
+
+                var gitProxy = "";
+                var proxy = HostContext.WebProxy.GetProxy(repoUrlBuilder.Uri);
+                if (proxy != null)
+                {
+                    result.Logs.Add($"{DateTime.UtcNow.ToString("O")} Runner is behind http proxy '{proxy.AbsoluteUri}'");
+                    if (HostContext.WebProxy.HttpProxyUsername != null ||
+                        HostContext.WebProxy.HttpsProxyUsername != null)
+                    {
+                        var proxyUrlWithCred = UrlUtil.GetCredentialEmbeddedUrl(
+                            proxy,
+                            HostContext.WebProxy.HttpProxyUsername ?? HostContext.WebProxy.HttpsProxyUsername,
+                            HostContext.WebProxy.HttpProxyPassword ?? HostContext.WebProxy.HttpsProxyPassword);
+                        gitProxy = $"-c http.proxy={proxyUrlWithCred}";
+                    }
+                    else
+                    {
+                        gitProxy = $"-c http.proxy={proxy.AbsoluteUri}";
+                    }
+                }
+
+                using (var processInvoker = HostContext.CreateService<IProcessInvoker>())
+                {
+                    processInvoker.OutputDataReceived += new EventHandler<ProcessDataReceivedEventArgs>((sender, args) =>
+                    {
+                        if (!string.IsNullOrEmpty(args.Data))
+                        {
+                            result.Logs.Add($"{DateTime.UtcNow.ToString("O")} {args.Data}");
+                        }
+                    });
+
+                    processInvoker.ErrorDataReceived += new EventHandler<ProcessDataReceivedEventArgs>((sender, args) =>
+                    {
+                        if (!string.IsNullOrEmpty(args.Data))
+                        {
+                            result.Logs.Add($"{DateTime.UtcNow.ToString("O")} {args.Data}");
+                        }
+                    });
+
+                    var gitArgs = $"{gitProxy} ls-remote --exit-code {repoUrlBuilder.Uri.AbsoluteUri} HEAD";
+                    result.Logs.Add($"{DateTime.UtcNow.ToString("O")} Run 'git {gitArgs}' ");
+
+                    var env = new Dictionary<string, string>
+                    {
+                        { "GIT_TRACE", "1" },
+                        { "GIT_CURL_VERBOSE", "1" }
+                    };
+
+                    if (extraCA)
+                    {
+                        env["GIT_SSL_CAINFO"] = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Root), "download_ca_cert.pem");
+                    }
+
+                    await processInvoker.ExecuteAsync(
+                        HostContext.GetDirectory(WellKnownDirectory.Root),
+                        _gitPath,
+                        gitArgs,
+                        env,
+                        true,
+                        CancellationToken.None);
+                }
+
+                result.Pass = true;
+            }
+            catch (Exception ex)
+            {
+                result.Pass = false;
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****     git ls-remote failed with error: {ex}");
+                if (result.Logs.Any(x => x.Contains("SSL Certificate problem", StringComparison.OrdinalIgnoreCase)))
+                {
+                    result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****     git ls-remote failed due to SSL cert issue.");
+                    result.SslError = true;
+                }
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+
+            }
+
+            return result;
+        }
+    }
+}

src/Runner.Listener/Checks/ICheckExtension.cs

@@ -0,0 +1,30 @@
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using GitHub.Runner.Common;
+
+namespace GitHub.Runner.Listener.Check
+{
+    public interface ICheckExtension : IExtension
+    {
+        int Order { get; }
+        string CheckName { get; }
+        string CheckDescription { get; }
+        string CheckLog { get; }
+        string HelpLink { get; }
+        Task<bool> RunCheck(string url, string pat);
+    }
+
+    public class CheckResult
+    {
+        public CheckResult()
+        {
+            Logs = new List<string>();
+        }
+
+        public bool Pass { get; set; }
+
+        public bool SslError { get; set; }
+
+        public List<string> Logs { get; set; }
+    }
+}

src/Runner.Listener/Checks/InternetCheck.cs

@@ -0,0 +1,59 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Threading.Tasks;
+using GitHub.Runner.Common;
+using GitHub.Runner.Sdk;
+
+namespace GitHub.Runner.Listener.Check
+{
+    public sealed class InternetCheck : RunnerService, ICheckExtension
+    {
+        private string _logFile = null;
+
+        public int Order => 1;
+
+        public string CheckName => "Internet Connection";
+
+        public string CheckDescription => "Make sure the actions runner have access to public internet.";
+
+        public string CheckLog => _logFile;
+
+        public string HelpLink => "https://github.com/actions/runner/blob/main/docs/checks/internet.md";
+
+        public Type ExtensionType => typeof(ICheckExtension);
+
+        public override void Initialize(IHostContext hostContext)
+        {
+            base.Initialize(hostContext);
+            _logFile = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Diag), StringUtil.Format("{0}_{1:yyyyMMdd-HHmmss}-utc.log", nameof(InternetCheck), DateTime.UtcNow));
+        }
+
+        // check runner access to api.github.com
+        public async Task<bool> RunCheck(string url, string pat)
+        {
+            await File.AppendAllLinesAsync(_logFile, HostContext.WarnLog());
+            await File.AppendAllLinesAsync(_logFile, HostContext.CheckProxy());
+
+            var checkTasks = new List<Task<CheckResult>>();
+            checkTasks.Add(CheckUtil.CheckDns("https://api.github.com"));
+            checkTasks.Add(CheckUtil.CheckPing("https://api.github.com"));
+
+            // We don't need to pass a PAT since it might be a token for GHES.
+            checkTasks.Add(HostContext.CheckHttpsRequests("https://api.github.com", pat: null, expectedHeader: "X-GitHub-Request-Id"));
+
+            var result = true;
+            while (checkTasks.Count > 0)
+            {
+                var finishedCheckTask = await Task.WhenAny<CheckResult>(checkTasks);
+                var finishedCheck = await finishedCheckTask;
+                result = result && finishedCheck.Pass;
+                await File.AppendAllLinesAsync(_logFile, finishedCheck.Logs);
+                checkTasks.Remove(finishedCheckTask);
+            }
+
+            await Task.WhenAll(checkTasks);
+            return result;
+        }
+    }
+}

src/Runner.Listener/Checks/NodeJsCheck.cs

@@ -0,0 +1,181 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Net;
+using System.Threading;
+using System.Threading.Tasks;
+using GitHub.Runner.Common;
+using GitHub.Runner.Sdk;
+
+namespace GitHub.Runner.Listener.Check
+{
+    public sealed class NodeJsCheck : RunnerService, ICheckExtension
+    {
+        private string _logFile = null;
+
+        public int Order => 4;
+
+        public string CheckName => "Node.js Certificate/Proxy Validation";
+
+        public string CheckDescription => "Make sure the node.js have access to GitHub.com or the GitHub Enterprise Server.";
+
+        public string CheckLog => _logFile;
+
+        public string HelpLink => "https://github.com/actions/runner/blob/main/docs/checks/nodejs.md";
+
+        public Type ExtensionType => typeof(ICheckExtension);
+
+        public override void Initialize(IHostContext hostContext)
+        {
+            base.Initialize(hostContext);
+            _logFile = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Diag), StringUtil.Format("{0}_{1:yyyyMMdd-HHmmss}-utc.log", nameof(NodeJsCheck), DateTime.UtcNow));
+        }
+
+        // node access to ghes/gh
+        public async Task<bool> RunCheck(string url, string pat)
+        {
+            await File.AppendAllLinesAsync(_logFile, HostContext.WarnLog());
+            await File.AppendAllLinesAsync(_logFile, HostContext.CheckProxy());
+
+            // Request to github.com or ghes server
+            var urlBuilder = new UriBuilder(url);
+            if (UrlUtil.IsHostedServer(urlBuilder))
+            {
+                urlBuilder.Host = $"api.{urlBuilder.Host}";
+                urlBuilder.Path = "";
+            }
+            else
+            {
+                urlBuilder.Path = "api/v3";
+            }
+
+            var checkNode = await CheckNodeJs(urlBuilder.Uri.AbsoluteUri, pat);
+            var result = checkNode.Pass;
+            await File.AppendAllLinesAsync(_logFile, checkNode.Logs);
+
+            // try fix SSL error by providing extra CA certificate.
+            if (checkNode.SslError)
+            {
+                var downloadCert = await HostContext.DownloadExtraCA(urlBuilder.Uri.AbsoluteUri, pat);
+                await File.AppendAllLinesAsync(_logFile, downloadCert.Logs);
+
+                if (downloadCert.Pass)
+                {
+                    var recheckNode = await CheckNodeJs(urlBuilder.Uri.AbsoluteUri, pat, extraCA: true);
+                    await File.AppendAllLinesAsync(_logFile, recheckNode.Logs);
+                    if (recheckNode.Pass)
+                    {
+                        await File.AppendAllLinesAsync(_logFile, new[] { $"{DateTime.UtcNow.ToString("O")} Fixed SSL error by providing extra CA certs." });
+                    }
+                }
+            }
+
+            return result;
+        }
+
+        private async Task<CheckResult> CheckNodeJs(string url, string pat, bool extraCA = false)
+        {
+            var result = new CheckResult();
+            try
+            {
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****     Make Http request to {url} using node.js ");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+
+                // Request to github.com or ghes server
+                Uri requestUrl = new Uri(url);
+                var env = new Dictionary<string, string>()
+                {
+                    { "HOSTNAME", requestUrl.Host },
+                    { "PORT", requestUrl.IsDefaultPort ? (requestUrl.Scheme.ToLowerInvariant() == "https" ? "443" : "80") : requestUrl.Port.ToString() },
+                    { "PATH", requestUrl.AbsolutePath },
+                    { "PAT", pat }
+                };
+
+                var proxy = HostContext.WebProxy.GetProxy(requestUrl);
+                if (proxy != null)
+                {
+                    env["PROXYHOST"] = proxy.Host;
+                    env["PROXYPORT"] = proxy.IsDefaultPort ? (proxy.Scheme.ToLowerInvariant() == "https" ? "443" : "80") : proxy.Port.ToString();
+                    if (HostContext.WebProxy.HttpProxyUsername != null ||
+                        HostContext.WebProxy.HttpsProxyUsername != null)
+                    {
+                        env["PROXYUSERNAME"] = HostContext.WebProxy.HttpProxyUsername ?? HostContext.WebProxy.HttpsProxyUsername;
+                        env["PROXYPASSWORD"] = HostContext.WebProxy.HttpProxyPassword ?? HostContext.WebProxy.HttpsProxyPassword;
+                    }
+                    else
+                    {
+                        env["PROXYUSERNAME"] = "";
+                        env["PROXYPASSWORD"] = "";
+                    }
+                }
+                else
+                {
+                    env["PROXYHOST"] = "";
+                    env["PROXYPORT"] = "";
+                    env["PROXYUSERNAME"] = "";
+                    env["PROXYPASSWORD"] = "";
+                }
+
+                if (extraCA)
+                {
+                    env["NODE_EXTRA_CA_CERTS"] = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Root), "download_ca_cert.pem");
+                }
+
+                using (var processInvoker = HostContext.CreateService<IProcessInvoker>())
+                {
+                    processInvoker.OutputDataReceived += new EventHandler<ProcessDataReceivedEventArgs>((sender, args) =>
+                    {
+                        if (!string.IsNullOrEmpty(args.Data))
+                        {
+                            result.Logs.Add($"{DateTime.UtcNow.ToString("O")} [STDOUT] {args.Data}");
+                        }
+                    });
+
+                    processInvoker.ErrorDataReceived += new EventHandler<ProcessDataReceivedEventArgs>((sender, args) =>
+                    {
+                        if (!string.IsNullOrEmpty(args.Data))
+                        {
+                            result.Logs.Add($"{DateTime.UtcNow.ToString("O")} [STDERR] {args.Data}");
+                        }
+                    });
+
+                    var makeWebRequestScript = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Bin), "checkScripts", "makeWebRequest.js");
+                    var node12 = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Externals), "node12", "bin", $"node{IOUtil.ExeExtension}");
+                    result.Logs.Add($"{DateTime.UtcNow.ToString("O")} Run '{node12} \"{makeWebRequestScript}\"' ");
+                    result.Logs.Add($"{DateTime.UtcNow.ToString("O")} {StringUtil.ConvertToJson(env)}");
+                    await processInvoker.ExecuteAsync(
+                        HostContext.GetDirectory(WellKnownDirectory.Root),
+                        node12,
+                        $"\"{makeWebRequestScript}\"",
+                        env,
+                        true,
+                        CancellationToken.None);
+                }
+
+                result.Pass = true;
+            }
+            catch (Exception ex)
+            {
+                result.Pass = false;
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****     Make https request to {url} using node.js failed with error: {ex}");
+                if (result.Logs.Any(x => x.Contains("UNABLE_TO_VERIFY_LEAF_SIGNATURE") ||
+                                         x.Contains("UNABLE_TO_GET_ISSUER_CERT_LOCALLY") ||
+                                         x.Contains("SELF_SIGNED_CERT_IN_CHAIN")))
+                {
+                    result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****     Https request failed due to SSL cert issue.");
+                    result.SslError = true;
+                }
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+            }
+
+            return result;
+        }
+    }
+}

src/Runner.Listener/CommandSettings.cs

@@ -27,6 +27,7 @@ namespace GitHub.Runner.Listener
 
         private readonly string[] validFlags =
         {
+            Constants.Runner.CommandLine.Flags.Check,
             Constants.Runner.CommandLine.Flags.Commit,
             Constants.Runner.CommandLine.Flags.Help,
             Constants.Runner.CommandLine.Flags.Replace,
@@ -42,6 +43,7 @@ namespace GitHub.Runner.Listener
             Constants.Runner.CommandLine.Args.Labels,
             Constants.Runner.CommandLine.Args.MonitorSocketAddress,
             Constants.Runner.CommandLine.Args.Name,
+            Constants.Runner.CommandLine.Args.PAT,
             Constants.Runner.CommandLine.Args.RunnerGroup,
             Constants.Runner.CommandLine.Args.StartupType,
             Constants.Runner.CommandLine.Args.Token,
@@ -59,6 +61,7 @@ namespace GitHub.Runner.Listener
         public bool Warmup => TestCommand(Constants.Runner.CommandLine.Commands.Warmup);
 
         // Flags.
+        public bool Check => TestFlag(Constants.Runner.CommandLine.Flags.Check);
         public bool Commit => TestFlag(Constants.Runner.CommandLine.Flags.Commit);
         public bool Help => TestFlag(Constants.Runner.CommandLine.Flags.Help);
         public bool Unattended => TestFlag(Constants.Runner.CommandLine.Flags.Unattended);
@@ -187,6 +190,22 @@ namespace GitHub.Runner.Listener
                 validator: Validators.NonEmptyValidator);
         }
 
+        public string GetGitHubPersonalAccessToken(bool required = false)
+        {
+            if (required)
+            {
+                return GetArgOrPrompt(
+                    name: Constants.Runner.CommandLine.Args.PAT,
+                    description: "What is your GitHub personal access token?",
+                    defaultValue: string.Empty,
+                    validator: Validators.NonEmptyValidator);
+            }
+            else
+            {
+                return GetArg(name: Constants.Runner.CommandLine.Args.PAT);
+            }
+        }
+
         public string GetRunnerRegisterToken()
         {
             return GetArgOrPrompt(

src/Runner.Listener/Configuration/ConfigurationManager.cs

@@ -4,7 +4,6 @@ using GitHub.Runner.Common.Util;
 using GitHub.Runner.Sdk;
 using GitHub.Services.Common;
 using GitHub.Services.OAuth;
-using GitHub.Services.WebApi;
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -12,6 +11,7 @@ using System.Net.Http;
 using System.Net.Http.Headers;
 using System.Runtime.InteropServices;
 using System.Security.Cryptography;
+using System.Text;
 using System.Threading.Tasks;
 
 namespace GitHub.Runner.Listener.Configuration
@@ -107,8 +107,8 @@ namespace GitHub.Runner.Listener.Configuration
                 else
                 {
                     runnerSettings.GitHubUrl = inputUrl;
-                    var githubToken = command.GetRunnerRegisterToken();
+                    var registerToken = await GetRunnerTokenAsync(command, inputUrl, "registration");
-                    GitHubAuthResult authResult = await GetTenantCredential(inputUrl, githubToken, Constants.RunnerEvent.Register);
+                    GitHubAuthResult authResult = await GetTenantCredential(inputUrl, registerToken, Constants.RunnerEvent.Register);
                     runnerSettings.ServerUrl = authResult.TenantUrl;
                     creds = authResult.ToVssCredentials();
                     Trace.Info("cred retrieved via GitHub auth");
@@ -117,7 +117,7 @@ namespace GitHub.Runner.Listener.Configuration
                 try
                 {
                     // Determine the service deployment type based on connection data. (Hosted/OnPremises)
-                    runnerSettings.IsHostedServer = runnerSettings.GitHubUrl == null || IsHostedServer(new UriBuilder(runnerSettings.GitHubUrl));
+                    runnerSettings.IsHostedServer = runnerSettings.GitHubUrl == null || UrlUtil.IsHostedServer(new UriBuilder(runnerSettings.GitHubUrl));
 
                     // Warn if the Actions server url and GHES server url has different Host
                     if (!runnerSettings.IsHostedServer)
@@ -263,6 +263,7 @@ namespace GitHub.Runner.Listener.Configuration
                     {
                         { "clientId", agent.Authorization.ClientId.ToString("D") },
                         { "authorizationUrl", agent.Authorization.AuthorizationUrl.AbsoluteUri },
+                        { "requireFipsCryptography", agent.Properties.GetValue("RequireFipsCryptography", false).ToString() }
                     },
                 };
 
@@ -373,8 +374,8 @@ namespace GitHub.Runner.Listener.Configuration
                     }
                     else
                     {
-                        var githubToken = command.GetRunnerDeletionToken();
+                        var deletionToken = await GetRunnerTokenAsync(command, settings.GitHubUrl, "remove");
-                        GitHubAuthResult authResult = await GetTenantCredential(settings.GitHubUrl, githubToken, Constants.RunnerEvent.Remove);
+                        GitHubAuthResult authResult = await GetTenantCredential(settings.GitHubUrl, deletionToken, Constants.RunnerEvent.Remove);
                         creds = authResult.ToVssCredentials();
                         Trace.Info("cred retrieved via GitHub auth");
                     }
@@ -508,18 +509,107 @@ namespace GitHub.Runner.Listener.Configuration
             return agent;
         }
 
-        private bool IsHostedServer(UriBuilder gitHubUrl)
+        private async Task<string> GetRunnerTokenAsync(CommandSettings command, string githubUrl, string tokenType)
         {
-            return string.Equals(gitHubUrl.Host, "github.com", StringComparison.OrdinalIgnoreCase) ||
+            var githubPAT = command.GetGitHubPersonalAccessToken();
-                string.Equals(gitHubUrl.Host, "www.github.com", StringComparison.OrdinalIgnoreCase) ||
+            var runnerToken = string.Empty;
-                string.Equals(gitHubUrl.Host, "github.localhost", StringComparison.OrdinalIgnoreCase);
+            if (!string.IsNullOrEmpty(githubPAT))
+            {
+                Trace.Info($"Retriving runner {tokenType} token using GitHub PAT.");
+                var jitToken = await GetJITRunnerTokenAsync(githubUrl, githubPAT, tokenType);
+                Trace.Info($"Retrived runner {tokenType} token is good to {jitToken.ExpiresAt}.");
+                HostContext.SecretMasker.AddValue(jitToken.Token);
+                runnerToken = jitToken.Token;
+            }
+
+            if (string.IsNullOrEmpty(runnerToken))
+            {
+                if (string.Equals("registration", tokenType, StringComparison.OrdinalIgnoreCase))
+                {
+                    runnerToken = command.GetRunnerRegisterToken();
+                }
+                else
+                {
+                    runnerToken = command.GetRunnerDeletionToken();
+                }
+            }
+
+            return runnerToken;
+        }
+
+        private async Task<GitHubRunnerRegisterToken> GetJITRunnerTokenAsync(string githubUrl, string githubToken, string tokenType)
+        {
+            var githubApiUrl = "";
+            var gitHubUrlBuilder = new UriBuilder(githubUrl);
+            var path = gitHubUrlBuilder.Path.Split('/', '\\', StringSplitOptions.RemoveEmptyEntries);
+            if (path.Length == 1)
+            {
+                // org runner
+                if (UrlUtil.IsHostedServer(gitHubUrlBuilder))
+                {
+                    githubApiUrl = $"{gitHubUrlBuilder.Scheme}://api.{gitHubUrlBuilder.Host}/orgs/{path[0]}/actions/runners/{tokenType}-token";
+                }
+                else
+                {
+                    githubApiUrl = $"{gitHubUrlBuilder.Scheme}://{gitHubUrlBuilder.Host}/api/v3/orgs/{path[0]}/actions/runners/{tokenType}-token";
+                }
+            }
+            else if (path.Length == 2)
+            {
+                // repo or enterprise runner.
+                var repoScope = "repos/";
+                if (string.Equals(path[0], "enterprises", StringComparison.OrdinalIgnoreCase))
+                {
+                    repoScope = "";
+                }
+
+                if (UrlUtil.IsHostedServer(gitHubUrlBuilder))
+                {
+                    githubApiUrl = $"{gitHubUrlBuilder.Scheme}://api.{gitHubUrlBuilder.Host}/{repoScope}{path[0]}/{path[1]}/actions/runners/{tokenType}-token";
+                }
+                else
+                {
+                    githubApiUrl = $"{gitHubUrlBuilder.Scheme}://{gitHubUrlBuilder.Host}/api/v3/{repoScope}{path[0]}/{path[1]}/actions/runners/{tokenType}-token";
+                }
+            }
+            else
+            {
+                throw new ArgumentException($"'{githubUrl}' should point to an org or repository.");
+            }
+
+            using (var httpClientHandler = HostContext.CreateHttpClientHandler())
+            using (var httpClient = new HttpClient(httpClientHandler))
+            {
+                var base64EncodingToken = Convert.ToBase64String(Encoding.UTF8.GetBytes($"github:{githubToken}"));
+                HostContext.SecretMasker.AddValue(base64EncodingToken);
+                httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("basic", base64EncodingToken);
+                httpClient.DefaultRequestHeaders.UserAgent.AddRange(HostContext.UserAgents);
+                httpClient.DefaultRequestHeaders.Accept.ParseAdd("application/vnd.github.v3+json");
+
+                var response = await httpClient.PostAsync(githubApiUrl, new StringContent(string.Empty));
+
+                if (response.IsSuccessStatusCode)
+                {
+                    Trace.Info($"Http response code: {response.StatusCode} from 'POST {githubApiUrl}'");
+                    var jsonResponse = await response.Content.ReadAsStringAsync();
+                    return StringUtil.ConvertFromJson<GitHubRunnerRegisterToken>(jsonResponse);
+                }
+                else
+                {
+                    _term.WriteError($"Http response code: {response.StatusCode} from 'POST {githubApiUrl}'");
+                    var errorResponse = await response.Content.ReadAsStringAsync();
+                    _term.WriteError(errorResponse);
+                    response.EnsureSuccessStatusCode();
+                    return null;
+                }
+            }
         }
 
         private async Task<GitHubAuthResult> GetTenantCredential(string githubUrl, string githubToken, string runnerEvent)
         {
             var githubApiUrl = "";
             var gitHubUrlBuilder = new UriBuilder(githubUrl);
-            if (IsHostedServer(gitHubUrlBuilder))
+            if (UrlUtil.IsHostedServer(gitHubUrlBuilder))
             {
                 githubApiUrl = $"{gitHubUrlBuilder.Scheme}://api.{gitHubUrlBuilder.Host}/actions/runner-registration";
             }

src/Runner.Listener/Configuration/CredentialManager.cs

@@ -71,6 +71,16 @@ namespace GitHub.Runner.Listener.Configuration
         }
     }
 
+    [DataContract]
+    public sealed class GitHubRunnerRegisterToken
+    {
+        [DataMember(Name = "token")]
+        public string Token { get; set; }
+
+        [DataMember(Name = "expires_at")]
+        public string ExpiresAt { get; set; }
+    }
+
     [DataContract]
     public sealed class GitHubAuthResult
     {

src/Runner.Listener/Configuration/IRSAKeyManager.cs

@@ -20,7 +20,7 @@ namespace GitHub.Runner.Listener.Configuration
         /// key is returned to the caller.
         /// </summary>
         /// <returns>An <c>RSACryptoServiceProvider</c> instance representing the key for the runner</returns>
-        RSACryptoServiceProvider CreateKey();
+        RSA CreateKey();
 
         /// <summary>
         /// Deletes the RSA key managed by the key manager.
@@ -32,7 +32,7 @@ namespace GitHub.Runner.Listener.Configuration
         /// </summary>
         /// <returns>An <c>RSACryptoServiceProvider</c> instance representing the key for the runner</returns>
         /// <exception cref="CryptographicException">No key exists in the store</exception>
-        RSACryptoServiceProvider GetKey();
+        RSA GetKey();
     }
 
     // Newtonsoft 10 is not working properly with dotnet RSAParameters class

src/Runner.Listener/Configuration/OAuthCredential.cs

@@ -36,7 +36,7 @@ namespace GitHub.Runner.Listener.Configuration
             // We expect the key to be in the machine store at this point. Configuration should have set all of
             // this up correctly so we can use the key to generate access tokens.
             var keyManager = context.GetService<IRSAKeyManager>();
-            var signingCredentials = VssSigningCredentials.Create(() => keyManager.GetKey());
+            var signingCredentials = VssSigningCredentials.Create(() => keyManager.GetKey(), StringUtil.ConvertToBoolean(CredentialData.Data.GetValueOrDefault("requireFipsCryptography"), false));
             var clientCredential = new VssOAuthJwtBearerClientCredential(clientId, authorizationUrl, signingCredentials);
             var agentCredential = new VssOAuthCredential(new Uri(oauthEndpointUrl, UriKind.Absolute), VssOAuthGrant.ClientCredentials, clientCredential);
 

src/Runner.Listener/Configuration/RSAEncryptedFileKeyManager.cs

@@ -13,14 +13,14 @@ namespace GitHub.Runner.Listener.Configuration
         private string _keyFile;
         private IHostContext _context;
 
-        public RSACryptoServiceProvider CreateKey()
+        public RSA CreateKey()
         {
-            RSACryptoServiceProvider rsa = null;
+            RSA rsa = null;
             if (!File.Exists(_keyFile))
             {
                 Trace.Info("Creating new RSA key using 2048-bit key length");
 
-                rsa = new RSACryptoServiceProvider(2048);
+                rsa = RSA.Create(2048);
 
                 // Now write the parameters to disk
                 SaveParameters(rsa.ExportParameters(true));
@@ -30,7 +30,7 @@ namespace GitHub.Runner.Listener.Configuration
             {
                 Trace.Info("Found existing RSA key parameters file {0}", _keyFile);
 
-                rsa = new RSACryptoServiceProvider();
+                rsa = RSA.Create();
                 rsa.ImportParameters(LoadParameters());
             }
 
@@ -46,7 +46,7 @@ namespace GitHub.Runner.Listener.Configuration
             }
         }
 
-        public RSACryptoServiceProvider GetKey()
+        public RSA GetKey()
         {
             if (!File.Exists(_keyFile))
             {
@@ -55,7 +55,7 @@ namespace GitHub.Runner.Listener.Configuration
 
             Trace.Info("Loading RSA key parameters from file {0}", _keyFile);
 
-            var rsa = new RSACryptoServiceProvider();
+            var rsa = RSA.Create();
             rsa.ImportParameters(LoadParameters());
             return rsa;
         }

src/Runner.Listener/Configuration/RSAFileKeyManager.cs

@@ -14,14 +14,14 @@ namespace GitHub.Runner.Listener.Configuration
         private string _keyFile;
         private IHostContext _context;
 
-        public RSACryptoServiceProvider CreateKey()
+        public RSA CreateKey()
         {
-            RSACryptoServiceProvider rsa = null;
+            RSA rsa = null;
             if (!File.Exists(_keyFile))
             {
                 Trace.Info("Creating new RSA key using 2048-bit key length");
 
-                rsa = new RSACryptoServiceProvider(2048);
+                rsa = RSA.Create(2048);
 
                 // Now write the parameters to disk
                 IOUtil.SaveObject(new RSAParametersSerializable(rsa.ExportParameters(true)), _keyFile);
@@ -54,7 +54,7 @@ namespace GitHub.Runner.Listener.Configuration
             {
                 Trace.Info("Found existing RSA key parameters file {0}", _keyFile);
 
-                rsa = new RSACryptoServiceProvider();
+                rsa = RSA.Create();
                 rsa.ImportParameters(IOUtil.LoadObject<RSAParametersSerializable>(_keyFile).RSAParameters);
             }
 
@@ -70,7 +70,7 @@ namespace GitHub.Runner.Listener.Configuration
             }
         }
 
-        public RSACryptoServiceProvider GetKey()
+        public RSA GetKey()
         {
             if (!File.Exists(_keyFile))
             {
@@ -80,7 +80,7 @@ namespace GitHub.Runner.Listener.Configuration
             Trace.Info("Loading RSA key parameters from file {0}", _keyFile);
 
             var parameters = IOUtil.LoadObject<RSAParametersSerializable>(_keyFile).RSAParameters;
-            var rsa = new RSACryptoServiceProvider();
+            var rsa = RSA.Create();
             rsa.ImportParameters(parameters);
             return rsa;
         }

src/Runner.Listener/MessageListener.cs

@@ -319,7 +319,8 @@ namespace GitHub.Runner.Listener
                 var keyManager = HostContext.GetService<IRSAKeyManager>();
                 using (var rsa = keyManager.GetKey())
                 {
-                    return aes.CreateDecryptor(rsa.Decrypt(_session.EncryptionKey.Value, RSAEncryptionPadding.OaepSHA1), message.IV);
+                    var padding = _session.UseFipsEncryption ? RSAEncryptionPadding.OaepSHA256 : RSAEncryptionPadding.OaepSHA1;
+                    return aes.CreateDecryptor(rsa.Decrypt(_session.EncryptionKey.Value, padding), message.IV);
                 }
             }
             else

src/Runner.Listener/Runner.cs

@@ -1,6 +1,5 @@
 using GitHub.DistributedTask.WebApi;
 using GitHub.Runner.Listener.Configuration;
-using GitHub.Runner.Common.Util;
 using System;
 using System.Threading;
 using System.Threading.Tasks;
@@ -11,6 +10,8 @@ using System.Reflection;
 using System.Runtime.CompilerServices;
 using GitHub.Runner.Common;
 using GitHub.Runner.Sdk;
+using System.Linq;
+using GitHub.Runner.Listener.Check;
 
 namespace GitHub.Runner.Listener
 {
@@ -72,6 +73,46 @@ namespace GitHub.Runner.Listener
                     return Constants.Runner.ReturnCode.Success;
                 }
 
+                if (command.Check)
+                {
+                    var url = command.GetUrl();
+                    var pat = command.GetGitHubPersonalAccessToken(required: true);
+                    var checkExtensions = HostContext.GetService<IExtensionManager>().GetExtensions<ICheckExtension>();
+                    var sortedChecks = checkExtensions.OrderBy(x => x.Order);
+                    foreach (var check in sortedChecks)
+                    {
+                        _term.WriteLine($"**********************************************************************************************************************");
+                        _term.WriteLine($"**  Check:               {check.CheckName}");
+                        _term.WriteLine($"**  Description:         {check.CheckDescription}");
+                        _term.WriteLine($"**********************************************************************************************************************");
+                        var result = await check.RunCheck(url, pat);
+                        if (!result)
+                        {
+                            _term.WriteLine($"**                                                                                                                  **");
+                            _term.WriteLine($"**                                            F A I L                                                               **");
+                            _term.WriteLine($"**                                                                                                                  **");
+                            _term.WriteLine($"**********************************************************************************************************************");
+                            _term.WriteLine($"** Log: {check.CheckLog}");
+                            _term.WriteLine($"** Help Doc: {check.HelpLink}");
+                            _term.WriteLine($"**********************************************************************************************************************");
+                        }
+                        else
+                        {
+                            _term.WriteLine($"**                                                                                                                  **");
+                            _term.WriteLine($"**                                            P A S S                                                               **");
+                            _term.WriteLine($"**                                                                                                                  **");
+                            _term.WriteLine($"**********************************************************************************************************************");
+                            _term.WriteLine($"** Log: {check.CheckLog}");
+                            _term.WriteLine($"**********************************************************************************************************************");
+                        }
+
+                        _term.WriteLine();
+                        _term.WriteLine();
+                    }
+
+                    return Constants.Runner.ReturnCode.Success;
+                }
+
                 // Configure runner prompt for args if not supplied
                 // Unattended configure mode will not prompt for args if not supplied and error on any missing or invalid value.
                 if (command.Configure)

src/Runner.Sdk/Util/UrlUtil.cs

@@ -4,6 +4,13 @@ namespace GitHub.Runner.Sdk
 {
     public static class UrlUtil
     {
+        public static bool IsHostedServer(UriBuilder gitHubUrl)
+        {
+            return string.Equals(gitHubUrl.Host, "github.com", StringComparison.OrdinalIgnoreCase) ||
+                string.Equals(gitHubUrl.Host, "www.github.com", StringComparison.OrdinalIgnoreCase) ||
+                string.Equals(gitHubUrl.Host, "github.localhost", StringComparison.OrdinalIgnoreCase);
+        }
+
         public static Uri GetCredentialEmbeddedUrl(Uri baseUrl, string username, string password)
         {
             ArgUtil.NotNull(baseUrl, nameof(baseUrl));

src/Runner.Worker/ActionCommandManager.cs

@@ -184,9 +184,6 @@ namespace GitHub.Runner.Worker
 
         public void ProcessCommand(IExecutionContext context, string line, ActionCommand command, ContainerInfo container)
         {
-            var configurationStore = HostContext.GetService<IConfigurationStore>();
-            var isHostedServer = configurationStore.GetSettings().IsHostedServer;
-
             var allowUnsecureCommands = false;
             bool.TryParse(Environment.GetEnvironmentVariable(Constants.Variables.Actions.AllowUnsupportedCommands), out allowUnsecureCommands);
 
@@ -201,22 +198,10 @@ namespace GitHub.Runner.Worker
                 bool.TryParse(envContext[Constants.Variables.Actions.AllowUnsupportedCommands].ToString(), out allowUnsecureCommands);
             }
 
-            // TODO: Eventually remove isHostedServer and apply this to dotcom customers as well
+            if (!allowUnsecureCommands)
-            if (!isHostedServer && !allowUnsecureCommands)
             {
                 throw new Exception(String.Format(Constants.Runner.UnsupportedCommandMessageDisabled, this.Command));
             }
-            else if (!allowUnsecureCommands)
-            {
-                // Log Telemetry and let user know they shouldn't do this
-                var issue = new Issue()
-                {
-                    Type = IssueType.Error,
-                    Message = String.Format(Constants.Runner.UnsupportedCommandMessage, this.Command)
-                };
-                issue.Data[Constants.Runner.InternalTelemetryIssueDataKey] = Constants.Runner.UnsupportedCommand;
-                context.AddIssue(issue);
-            }
 
             if (!command.Properties.TryGetValue(SetEnvCommandProperties.Name, out string envName) || string.IsNullOrEmpty(envName))
             {
@@ -339,10 +324,7 @@ namespace GitHub.Runner.Worker
         public Type ExtensionType => typeof(IActionCommandExtension);
 
         public void ProcessCommand(IExecutionContext context, string line, ActionCommand command, ContainerInfo container)
-        {
+        {          
-            var configurationStore = HostContext.GetService<IConfigurationStore>();
-            var isHostedServer = configurationStore.GetSettings().IsHostedServer;
-
             var allowUnsecureCommands = false;
             bool.TryParse(Environment.GetEnvironmentVariable(Constants.Variables.Actions.AllowUnsupportedCommands), out allowUnsecureCommands);
 
@@ -357,22 +339,10 @@ namespace GitHub.Runner.Worker
                 bool.TryParse(envContext[Constants.Variables.Actions.AllowUnsupportedCommands].ToString(), out allowUnsecureCommands);
             }
 
-            // TODO: Eventually remove isHostedServer and apply this to dotcom customers as well
+            if (!allowUnsecureCommands)
-            if (!isHostedServer && !allowUnsecureCommands)
             {
                 throw new Exception(String.Format(Constants.Runner.UnsupportedCommandMessageDisabled, this.Command));
             }
-            else if (!allowUnsecureCommands)
-            {
-                // Log Telemetry and let user know they shouldn't do this
-                var issue = new Issue()
-                {
-                    Type = IssueType.Error,
-                    Message = String.Format(Constants.Runner.UnsupportedCommandMessage, this.Command)
-                };
-                issue.Data[Constants.Runner.InternalTelemetryIssueDataKey] = Constants.Runner.UnsupportedCommand;
-                context.AddIssue(issue);
-            }
 
             ArgUtil.NotNullOrEmpty(command.Data, "path");
             context.Global.PrependPath.RemoveAll(x => string.Equals(x, command.Data, StringComparison.CurrentCulture));

src/Runner.Worker/ActionManager.cs

@@ -594,15 +594,33 @@ namespace GitHub.Runner.Worker
                     actionDownloadInfos = await jobServer.ResolveActionDownloadInfoAsync(executionContext.Global.Plan.ScopeIdentifier, executionContext.Global.Plan.PlanType, executionContext.Global.Plan.PlanId, new WebApi.ActionReferenceList { Actions = actionReferences }, executionContext.CancellationToken);
                     break;
                 }
-                catch (Exception ex) when (attempt < 3)
+                catch (Exception ex) when (!executionContext.CancellationToken.IsCancellationRequested) // Do not retry if the run is canceled.
                 {
-                    executionContext.Output($"Failed to resolve action download info. Error: {ex.Message}");
+                    if (attempt < 3)
-                    executionContext.Debug(ex.ToString());
-                    if (String.IsNullOrEmpty(Environment.GetEnvironmentVariable("_GITHUB_ACTION_DOWNLOAD_NO_BACKOFF")))
                     {
-                        var backoff = BackoffTimerHelper.GetRandomBackoff(TimeSpan.FromSeconds(10), TimeSpan.FromSeconds(30));
+                        executionContext.Output($"Failed to resolve action download info. Error: {ex.Message}");
-                        executionContext.Output($"Retrying in {backoff.TotalSeconds} seconds");
+                        executionContext.Debug(ex.ToString());
-                        await Task.Delay(backoff);
+                        if (String.IsNullOrEmpty(Environment.GetEnvironmentVariable("_GITHUB_ACTION_DOWNLOAD_NO_BACKOFF")))
+                        {
+                            var backoff = BackoffTimerHelper.GetRandomBackoff(TimeSpan.FromSeconds(10), TimeSpan.FromSeconds(30));
+                            executionContext.Output($"Retrying in {backoff.TotalSeconds} seconds");
+                            await Task.Delay(backoff);
+                        }
+                    }
+                    else
+                    {
+                        // Some possible cases are:
+                        // * Repo is rate limited
+                        // * Repo or tag doesn't exist, or isn't public
+                        if (ex is WebApi.UnresolvableActionDownloadInfoException)
+                        {
+                            throw;
+                        }
+                        else
+                        {
+                            // This exception will be traced as an infrastructure failure
+                            throw new WebApi.FailedToResolveActionDownloadInfoException("Failed to resolve action download info.", ex);
+                        }
                     }
                 }
             }

src/Runner.Worker/ActionRunner.cs

@@ -142,6 +142,11 @@ namespace GitHub.Runner.Worker
                 ExecutionContext.SetGitHubContext("action_repository", repoPathReferenceAction.Name);
                 ExecutionContext.SetGitHubContext("action_ref", repoPathReferenceAction.Ref);
             }
+            else
+            {
+                ExecutionContext.SetGitHubContext("action_repository", null);
+                ExecutionContext.SetGitHubContext("action_ref", null);
+            }
 
             // Setup container stephost for running inside the container.
             if (ExecutionContext.Global.Container != null)
@@ -250,11 +255,11 @@ namespace GitHub.Runner.Worker
             handler.PrintActionDetails(Stage);
 
             // Run the task.
-            try 
+            try
             {
                 await handler.RunAsync(Stage);
             }
-            finally 
+            finally
             {
                 fileCommandManager.ProcessFiles(ExecutionContext, ExecutionContext.Global.Container);
             }

src/Runner.Worker/Container/ContainerInfo.cs

@@ -21,6 +21,11 @@ namespace GitHub.Runner.Worker.Container
         {
         }
 
+        public ContainerInfo(IHostContext hostContext)
+        {
+            UpdateWebProxyEnv(hostContext.WebProxy);
+        }
+
         public ContainerInfo(IHostContext hostContext, Pipelines.JobContainer container, bool isJobContainer = true, string networkAlias = null)
         {
             this.ContainerName = container.Alias;

src/Runner.Worker/ExecutionContext.cs

@@ -918,6 +918,12 @@ namespace GitHub.Runner.Worker
             context.AddIssue(new Issue() { Type = IssueType.Error, Message = message });
         }
 
+        // Do not add a format string overload. See comment on ExecutionContext.Write().
+        public static void InfrastructureError(this IExecutionContext context, string message)
+        {
+            context.AddIssue(new Issue() { Type = IssueType.Error, Message = message, IsInfrastructureIssue = true});
+        }
+
         // Do not add a format string overload. See comment on ExecutionContext.Write().
         public static void Warning(this IExecutionContext context, string message)
         {

src/Runner.Worker/Handlers/ContainerActionHandler.cs

@@ -70,7 +70,7 @@ namespace GitHub.Runner.Worker.Handlers
             }
 
             // run container
-            var container = new ContainerInfo()
+            var container = new ContainerInfo(HostContext)
             {
                 ContainerImage = Data.Image,
                 ContainerName = ExecutionContext.Id.ToString("N"),

src/Runner.Worker/JobExtension.cs

@@ -1,10 +1,11 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.Globalization;
 using System.IO;
 using System.Linq;
 using System.Runtime.Serialization;
+using System.Threading;
 using System.Threading.Tasks;
 using GitHub.DistributedTask.Expressions2;
 using GitHub.DistributedTask.ObjectTemplating.Tokens;
@@ -41,6 +42,8 @@ namespace GitHub.Runner.Worker
         private readonly HashSet<string> _existingProcesses = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
         private bool _processCleanup;
         private string _processLookupId = $"github_{Guid.NewGuid()}";
+        private CancellationTokenSource _diskSpaceCheckToken = new CancellationTokenSource();
+        private Task _diskSpaceCheckTask = null;
 
         // Download all required actions.
         // Make sure all condition inputs are valid.
@@ -325,6 +328,12 @@ namespace GitHub.Runner.Worker
                         }
                     }
 
+                    jobContext.Global.EnvironmentVariables.TryGetValue(Constants.Runner.Features.DiskSpaceWarning, out var enableWarning);
+                    if (StringUtil.ConvertToBoolean(enableWarning, defaultValue: true))
+                    {
+                        _diskSpaceCheckTask = CheckDiskSpaceAsync(context, _diskSpaceCheckToken.Token);
+                    }
+
                     return steps;
                 }
                 catch (OperationCanceledException ex) when (jobContext.CancellationToken.IsCancellationRequested)
@@ -335,6 +344,14 @@ namespace GitHub.Runner.Worker
                     context.Result = TaskResult.Canceled;
                     throw;
                 }
+                catch (FailedToResolveActionDownloadInfoException ex)
+                {
+                    // Log the error and fail the JobExtension Initialization.
+                    Trace.Error($"Caught exception from JobExtenion Initialization: {ex}");
+                    context.InfrastructureError(ex.Message);
+                    context.Result = TaskResult.Failed;
+                    throw;
+                }
                 catch (Exception ex)
                 {
                     // Log the error and fail the JobExtension Initialization.
@@ -521,6 +538,11 @@ namespace GitHub.Runner.Worker
                             }
                         }
                     }
+
+                    if (_diskSpaceCheckTask != null)
+                    {
+                        _diskSpaceCheckToken.Cancel();
+                    }
                 }
                 catch (Exception ex)
                 {
@@ -536,6 +558,39 @@ namespace GitHub.Runner.Worker
             }
         }
 
+        private async Task CheckDiskSpaceAsync(IExecutionContext context, CancellationToken token)
+        {
+            while (!token.IsCancellationRequested)
+            {
+                // Add warning when disk is lower than system.runner.lowdiskspacethreshold from service (default to 100 MB on service side)
+                var lowDiskSpaceThreshold = context.Global.Variables.GetInt(WellKnownDistributedTaskVariables.RunnerLowDiskspaceThreshold);
+                if (lowDiskSpaceThreshold == null)
+                {
+                    Trace.Info($"Low diskspace warning is not enabled.");
+                    return;
+                }
+                var workDirRoot = Directory.GetDirectoryRoot(HostContext.GetDirectory(WellKnownDirectory.Work));
+                var driveInfo = new DriveInfo(workDirRoot);
+                var freeSpaceInMB = driveInfo.AvailableFreeSpace / 1024 / 1024;
+                if (freeSpaceInMB < lowDiskSpaceThreshold)
+                {
+                    var issue = new Issue() { Type = IssueType.Warning, Message = $"You are running out of disk space. The runner will stop working when the machine runs out of disk space. Free space left: {freeSpaceInMB} MB" };
+                    issue.Data[Constants.Runner.InternalTelemetryIssueDataKey] = Constants.Runner.LowDiskSpace;
+                    context.AddIssue(issue);
+                    return;
+                }
+
+                try
+                {
+                    await Task.Delay(10 * 1000, token);
+                }
+                catch (TaskCanceledException)
+                {
+                    // ignore
+                }
+            }
+        }
+
         private Dictionary<int, Process> SnapshotProcesses()
         {
             Dictionary<int, Process> snapshot = new Dictionary<int, Process>();

src/Sdk/DTWebApi/WebApi/Exceptions.cs

@@ -2458,4 +2458,42 @@ namespace GitHub.DistributedTask.WebApi
         {
         }
     }
+
+    [Serializable]
+    public class UnresolvableActionDownloadInfoException : DistributedTaskException
+    {
+        public UnresolvableActionDownloadInfoException(String message)
+            : base(message)
+        {
+        }
+
+        public UnresolvableActionDownloadInfoException(String message, Exception innerException)
+            : base(message, innerException)
+        {
+        }
+
+        protected UnresolvableActionDownloadInfoException(SerializationInfo info, StreamingContext context)
+            : base(info, context)
+        {
+        }
+    }
+
+    [Serializable]
+    public sealed class FailedToResolveActionDownloadInfoException : DistributedTaskException
+    {
+        public FailedToResolveActionDownloadInfoException(String message)
+            : base(message)
+        {
+        }
+
+        public FailedToResolveActionDownloadInfoException(String message, Exception innerException)
+            : base(message, innerException)
+        {
+        }
+
+        private FailedToResolveActionDownloadInfoException(SerializationInfo info, StreamingContext context)
+            : base(info, context)
+        {
+        }
+    }
 }

src/Sdk/DTWebApi/WebApi/Issue.cs

@@ -17,6 +17,7 @@ namespace GitHub.DistributedTask.WebApi
             this.Type = issueToBeCloned.Type;
             this.Category = issueToBeCloned.Category;
             this.Message = issueToBeCloned.Message;
+            this.IsInfrastructureIssue = issueToBeCloned.IsInfrastructureIssue;
 
             if (issueToBeCloned.m_data != null)
             {
@@ -48,6 +49,13 @@ namespace GitHub.DistributedTask.WebApi
             set;
         }
 
+        [DataMember(Order = 4)]
+        public bool? IsInfrastructureIssue
+        {
+            get;
+            set;
+        }
+
         public IDictionary<String, String> Data
         {
             get

src/Sdk/DTWebApi/WebApi/TaskAgentSession.cs

@@ -65,5 +65,15 @@ namespace GitHub.DistributedTask.WebApi
             get;
             set;
         }
+
+        /// <summary>
+        /// Gets or sets whether to use FIPS compliant encryption scheme for job message key
+        /// </summary>
+        [DataMember]
+        public bool UseFipsEncryption
+        {
+            get;
+            set;
+        }
     }
 }

src/Sdk/DTWebApi/WebApi/TimelineRecordState.cs

@@ -13,5 +13,8 @@ namespace GitHub.DistributedTask.WebApi
 
         [EnumMember]
         Completed,
+
+        [EnumMember]
+        Delayed,
     }
 }

src/Sdk/DTWebApi/WebApi/WellKnownDistributedTaskVariables.cs

@@ -5,5 +5,6 @@ namespace GitHub.DistributedTask.WebApi
     public static class WellKnownDistributedTaskVariables
     {
         public static readonly String JobId = "system.jobId";
+        public static readonly String RunnerLowDiskspaceThreshold = "system.runner.lowdiskspacethreshold";
     }
 }

src/Sdk/WebApi/WebApi/Jwt/JsonWebTokenUtilities.cs

@@ -130,55 +130,6 @@ namespace GitHub.Services.WebApi.Jwt
             return credentials.SignatureAlgorithm;
         }
 
-        public static ClaimsPrincipal ValidateToken(this JsonWebToken token, JsonWebTokenValidationParameters parameters)
-        {
-            ArgumentUtility.CheckForNull(token, nameof(token));
-            ArgumentUtility.CheckForNull(parameters, nameof(parameters));
-
-            ClaimsIdentity actorIdentity = ValidateActor(token, parameters);
-            ValidateLifetime(token, parameters);
-            ValidateAudience(token, parameters);
-            ValidateSignature(token, parameters);
-            ValidateIssuer(token, parameters);
-
-            ClaimsIdentity identity = new ClaimsIdentity("Federation", parameters.IdentityNameClaimType, ClaimTypes.Role);
-
-            if (actorIdentity != null)
-            {
-                identity.Actor = actorIdentity;
-            }
-
-            IEnumerable<Claim> claims = token.ExtractClaims();
-
-            foreach (Claim claim in claims)
-            {
-                identity.AddClaim(new Claim(claim.Type, claim.Value, claim.ValueType, token.Issuer));
-            }
-
-            return new ClaimsPrincipal(identity);
-        }
-
-        private static ClaimsIdentity ValidateActor(JsonWebToken token, JsonWebTokenValidationParameters parameters)
-        {
-            ArgumentUtility.CheckForNull(token, nameof(token));
-            ArgumentUtility.CheckForNull(parameters, nameof(parameters));
-
-            if (!parameters.ValidateActor)
-            {
-                return null;
-            }
-
-            //this recursive call with check the parameters
-            ClaimsPrincipal principal = token.Actor.ValidateToken(parameters.ActorValidationParameters);
-
-            if (!(principal?.Identity is ClaimsIdentity))
-            {
-                throw new ActorValidationException();
-            }
-
-            return (ClaimsIdentity)principal.Identity;
-        }
-
         private static void ValidateLifetime(JsonWebToken token, JsonWebTokenValidationParameters parameters)
         {
             ArgumentUtility.CheckForNull(token, nameof(token));
@@ -241,59 +192,6 @@ namespace GitHub.Services.WebApi.Jwt
             throw new InvalidAudienceException(); //validation exception;            
         }
 
-        private static void ValidateSignature(JsonWebToken token, JsonWebTokenValidationParameters parameters)
-        {
-            ArgumentUtility.CheckForNull(token, nameof(token));
-            ArgumentUtility.CheckForNull(parameters, nameof(parameters));
-
-            if (!parameters.ValidateSignature)
-            {
-                return;
-            }
-
-            string encodedData = token.EncodedToken;
-
-            string[] parts = encodedData.Split('.');
-
-            if (parts.Length != 3)
-            {
-                throw new InvalidTokenException(JwtResources.EncodedTokenDataMalformed()); //validation exception
-            }
-
-            if (string.IsNullOrEmpty(parts[2]))
-            {
-                throw new InvalidTokenException(JwtResources.SignatureNotFound()); //validation exception
-            }
-
-            if (token.Algorithm == JWTAlgorithm.None)
-            {
-                throw new InvalidTokenException(JwtResources.InvalidSignatureAlgorithm()); //validation exception
-            }
-
-            ArgumentUtility.CheckForNull(parameters.SigningCredentials, nameof(parameters.SigningCredentials));
-
-            //ArgumentUtility.CheckEnumerableForNullOrEmpty(parameters.SigningToken.SecurityKeys, nameof(parameters.SigningToken.SecurityKeys));
-
-            byte[] sourceInput = Encoding.UTF8.GetBytes(string.Format("{0}.{1}", parts[0], parts[1]));
-
-            byte[] sourceSignature = parts[2].FromBase64StringNoPadding();
-
-
-            try
-            {
-                if (parameters.SigningCredentials.VerifySignature(sourceInput, sourceSignature))
-                {
-                    return;
-                }
-            }
-            catch (Exception)
-            {
-                //swallow exceptions here, we'll throw if nothing works...
-            }
-
-            throw new SignatureValidationException(); //valiation exception
-        }
-
         private static void ValidateIssuer(JsonWebToken token, JsonWebTokenValidationParameters parameters)
         {
             ArgumentUtility.CheckForNull(token, nameof(token));

src/Sdk/WebApi/WebApi/VssSigningCredentials.cs

@@ -1,7 +1,6 @@
 using System;
 using System.Collections.Generic;
 using System.Security.Cryptography;
-using System.Security.Cryptography.X509Certificates;
 using GitHub.Services.Common;
 using GitHub.Services.WebApi.Jwt;
 
@@ -75,7 +74,6 @@ namespace GitHub.Services.WebApi
             {
                 throw new InvalidOperationException();
             }
-
             return GetSignature(input);
         }
 
@@ -86,48 +84,13 @@ namespace GitHub.Services.WebApi
         /// <returns>A blob of data representing the signature of the input data</returns>
         protected abstract Byte[] GetSignature(Byte[] input);
 
-        /// <summary>
-        /// Verifies the signature of the input data, returning true if the signature is valid.
-        /// </summary>
-        /// <param name="input">The data which should be signed</param>
-        /// <param name="signature">The signature which should be verified</param>
-        /// <returns>True if the provided signature matches the current signing token; otherwise, false</returns>
-        public abstract Boolean VerifySignature(Byte[] input, Byte[] signature);
-
-        /// <summary>
-        /// Creates a new <c>VssSigningCredentials</c> instance using the specified <paramref name="certificate"/> instance
-        /// as the signing key.
-        /// </summary>
-        /// <param name="certificate">The certificate which contains the key used for signing and verification</param>
-        /// <returns>A new <c>VssSigningCredentials</c> instance which uses the specified certificate for signing</returns>
-        public static VssSigningCredentials Create(X509Certificate2 certificate)
-        {
-            ArgumentUtility.CheckForNull(certificate, nameof(certificate));
-
-            if (certificate.HasPrivateKey)
-            {
-                var rsa = certificate.GetRSAPrivateKey();
-                if (rsa == null)
-                {
-                    throw new SignatureAlgorithmUnsupportedException(certificate.SignatureAlgorithm.FriendlyName);
-                }
-
-                if (rsa.KeySize < c_minKeySize)
-                {
-                    throw new InvalidCredentialsException(JwtResources.SigningTokenKeyTooSmall());
-                }
-            }
-
-            return new X509Certificate2SigningToken(certificate);
-        }
-
         /// <summary>
         /// Creates a new <c>VssSigningCredentials</c> instance using the specified <paramref name="factory"/> 
         /// callback function to retrieve the signing key.
         /// </summary>
         /// <param name="factory">The factory which creates <c>RSA</c> keys used for signing and verification</param>
         /// <returns>A new <c>VssSigningCredentials</c> instance which uses the specified provider for signing</returns>
-        public static VssSigningCredentials Create(Func<RSA> factory)
+        public static VssSigningCredentials Create(Func<RSA> factory, bool requireFipsCryptography)
         {
             ArgumentUtility.CheckForNull(factory, nameof(factory));
 
@@ -143,80 +106,19 @@ namespace GitHub.Services.WebApi
                     throw new InvalidCredentialsException(JwtResources.SigningTokenKeyTooSmall());
                 }
 
-                return new RSASigningToken(factory, rsa.KeySize);
+                if (requireFipsCryptography)
+                {
+                    return new RSASigningToken(factory, rsa.KeySize, RSASignaturePadding.Pss);
+                }
+                return new RSASigningToken(factory, rsa.KeySize, RSASignaturePadding.Pkcs1);
             }
         }
 
-        /// <summary>
-        /// Creates a new <c>VssSigningCredentials</c> instance using the specified <paramref name="key"/> as the signing 
-        /// key. The returned signing token performs symmetric key signing and verification.
-        /// </summary>
-        /// <param name="rsa">The key used for signing and verification</param>
-        /// <returns>A new <c>VssSigningCredentials</c> instance which uses the specified key for signing</returns>
-        public static VssSigningCredentials Create(Byte[] key)
-        {
-            ArgumentUtility.CheckForNull(key, nameof(key));
-
-            // Probably should have validation here, but there was none previously
-            return new SymmetricKeySigningToken(key);
-        }
-
         private const Int32 c_minKeySize = 2048;
         private readonly DateTime m_effectiveDate;
 
 #region Concrete Implementations
 
-        private class SymmetricKeySigningToken : VssSigningCredentials
-        {
-            public SymmetricKeySigningToken(Byte[] key)
-            {
-                m_key = new Byte[key.Length];
-                Buffer.BlockCopy(key, 0, m_key, 0, m_key.Length);
-            }
-
-            public override Boolean CanSignData
-            {
-                get
-                {
-                    return true;
-                }
-            }
-
-            public override Int32 KeySize
-            {
-                get
-                {
-                    return m_key.Length * 8;
-                }
-            }
-
-            public override JWTAlgorithm SignatureAlgorithm
-            {
-                get
-                {
-                    return JWTAlgorithm.HS256;
-                }
-            }
-
-            protected override Byte[] GetSignature(Byte[] input)
-            {
-                using (var hash = new HMACSHA256(m_key))
-                {
-                    return hash.ComputeHash(input);
-                }
-            }
-
-            public override Boolean VerifySignature(
-                Byte[] input,
-                Byte[] signature)
-            {
-                var computedSignature = SignData(input);
-                return SecureCompare.TimeInvariantEquals(computedSignature, signature);
-            }
-
-            private readonly Byte[] m_key;
-        }
-
         private abstract class AsymmetricKeySigningToken : VssSigningCredentials
         {
             protected abstract Boolean HasPrivateKey();
@@ -244,70 +146,14 @@ namespace GitHub.Services.WebApi
             private Boolean? m_hasPrivateKey;
         }
 
-        private class X509Certificate2SigningToken : AsymmetricKeySigningToken, IJsonWebTokenHeaderProvider
-        {
-            public X509Certificate2SigningToken(X509Certificate2 certificate)
-            {
-                m_certificate = certificate;
-            }
-
-            public override Int32 KeySize
-            {
-                get
-                {
-                    return m_certificate.GetRSAPublicKey().KeySize;
-                }
-            }
-
-            public override DateTime ValidFrom
-            {
-                get
-                {
-                    return m_certificate.NotBefore;
-                }
-            }
-
-            public override DateTime ValidTo
-            {
-                get
-                {
-                    return m_certificate.NotAfter;
-                }
-            }
-
-            public override Boolean VerifySignature(
-                Byte[] input,
-                Byte[] signature)
-            {
-                var rsa = m_certificate.GetRSAPublicKey();
-                return rsa.VerifyData(input, signature, HashAlgorithmName.SHA256, RSASignaturePadding.Pkcs1);
-            }
-
-            protected override Byte[] GetSignature(Byte[] input)
-            {
-                var rsa = m_certificate.GetRSAPrivateKey();
-                return rsa.SignData(input, HashAlgorithmName.SHA256, RSASignaturePadding.Pkcs1);
-            }
-
-            protected override Boolean HasPrivateKey()
-            {
-                return m_certificate.HasPrivateKey;
-            }
-
-            void IJsonWebTokenHeaderProvider.SetHeaders(IDictionary<String, Object> headers)
-            {
-                headers[JsonWebTokenHeaderParameters.X509CertificateThumbprint] = m_certificate.GetCertHash().ToBase64StringNoPadding();
-            }
-
-            private readonly X509Certificate2 m_certificate;
-        }
-
         private class RSASigningToken : AsymmetricKeySigningToken
         {
             public RSASigningToken(
                 Func<RSA> factory,
-                Int32 keySize)
+                Int32 keySize,
+                RSASignaturePadding signaturePadding)
             {
+                m_signaturePadding = signaturePadding;
                 m_keySize = keySize;
                 m_factory = factory;
             }
@@ -324,7 +170,7 @@ namespace GitHub.Services.WebApi
             {
                 using (var rsa = m_factory())
                 {
-                    return rsa.SignData(input, HashAlgorithmName.SHA256, RSASignaturePadding.Pkcs1);
+                    return rsa.SignData(input, HashAlgorithmName.SHA256, m_signaturePadding);
                 }
             }
 
@@ -335,7 +181,7 @@ namespace GitHub.Services.WebApi
                     // As unfortunate as this is, there is no way to tell from an RSA implementation, based on querying
                     // properties alone, if it supports signature operations or has a private key. This is a one-time
                     // hit for the signing credentials implementation, so it shouldn't be a huge deal.
-                    GetSignature(new Byte[1] { 1 });    
+                    GetSignature(new Byte[1] { 1 });
                     return true;
                 }
                 catch (CryptographicException)
@@ -344,18 +190,9 @@ namespace GitHub.Services.WebApi
                 }
             }
 
-            public override Boolean VerifySignature(
-                Byte[] input,
-                Byte[] signature)
-            {
-                using (var rsa = m_factory())
-                {
-                    return rsa.VerifyData(input, signature, HashAlgorithmName.SHA256, RSASignaturePadding.Pkcs1);
-                }
-            }
-
             private readonly Int32 m_keySize;
             private readonly Func<RSA> m_factory;
+            private readonly RSASignaturePadding m_signaturePadding;
         }
 
         #endregion

src/Test/L0/ServiceInterfacesL0.cs

@@ -1,4 +1,5 @@
 using GitHub.Runner.Listener;
+using GitHub.Runner.Listener.Check;
 using GitHub.Runner.Listener.Configuration;
 using GitHub.Runner.Worker;
 using GitHub.Runner.Worker.Handlers;
@@ -21,7 +22,8 @@ namespace GitHub.Runner.Common.Tests
             // Otherwise, the interface needs to whitelisted.
             var whitelist = new[]
             {
-                typeof(ICredentialProvider)
+                typeof(ICredentialProvider),
+                typeof(ICheckExtension),
             };
             Validate(
                 assembly: typeof(IMessageListener).GetTypeInfo().Assembly,
@@ -85,7 +87,8 @@ namespace GitHub.Runner.Common.Tests
                     continue;
                 }
 
-                if (interfaceTypeInfo.FullName.Contains("IConverter")){
+                if (interfaceTypeInfo.FullName.Contains("IConverter"))
+                {
                     continue;
                 }
 

src/Test/L0/Worker/ActionRunnerL0.cs

@@ -333,6 +333,66 @@ namespace GitHub.Runner.Common.Tests.Worker
             _ec.Verify(x => x.AddIssue(It.Is<Issue>(s => s.Message.Contains("Unexpected input(s) 'invalid1', 'invalid2'")), It.IsAny<string>()), Times.Once);
         }
 
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Worker")]
+        public async void SetGitHubContextActionRepoRef()
+        {
+            //Arrange
+            Setup();
+            var actionId = Guid.NewGuid();
+            var actionInputs = new MappingToken(null, null, null);
+            actionInputs.Add(new StringToken(null, null, null, "input1"), new StringToken(null, null, null, "test1"));
+            actionInputs.Add(new StringToken(null, null, null, "input2"), new StringToken(null, null, null, "test2"));
+            var action = new Pipelines.ActionStep()
+            {
+                Name = "action",
+                Id = actionId,
+                Reference = new Pipelines.RepositoryPathReference()
+                {
+                    Name = "actions/test",
+                    Ref = "master"
+                },
+                Inputs = actionInputs
+            };
+
+            _actionRunner.Action = action;
+
+            Dictionary<string, string> finialInputs = new Dictionary<string, string>();
+            _handlerFactory.Setup(x => x.Create(It.IsAny<IExecutionContext>(), It.IsAny<ActionStepDefinitionReference>(), It.IsAny<IStepHost>(), It.IsAny<ActionExecutionData>(), It.IsAny<Dictionary<string, string>>(), It.IsAny<Dictionary<string, string>>(), It.IsAny<Variables>(), It.IsAny<string>()))
+                           .Callback((IExecutionContext executionContext, Pipelines.ActionStepDefinitionReference actionReference, IStepHost stepHost, ActionExecutionData data, Dictionary<string, string> inputs, Dictionary<string, string> environment, Variables runtimeVariables, string taskDirectory) =>
+                           {
+                               finialInputs = inputs;
+                           })
+                           .Returns(new Mock<IHandler>().Object);
+
+            //Act
+            await _actionRunner.RunAsync();
+
+            //Assert
+            _ec.Verify(x => x.SetGitHubContext("action_repository", "actions/test"), Times.Once);
+            _ec.Verify(x => x.SetGitHubContext("action_ref", "master"), Times.Once);
+
+            action = new Pipelines.ActionStep()
+            {
+                Name = "action",
+                Id = actionId,
+                Reference = new Pipelines.ScriptReference(),
+                Inputs = actionInputs
+            };
+            _actionRunner.Action = action;
+
+            _hc.EnqueueInstance<IDefaultStepHost>(_defaultStepHost.Object);
+            _hc.EnqueueInstance(_fileCommandManager.Object);
+
+            //Act
+            await _actionRunner.RunAsync();
+
+            //Assert
+            _ec.Verify(x => x.SetGitHubContext("action_repository", null), Times.Once);
+            _ec.Verify(x => x.SetGitHubContext("action_ref", null), Times.Once);
+        }
+
         private void Setup([CallerMemberName] string name = "")
         {
             _ecTokenSource?.Dispose();

src/runnerversion

@@ -1 +1 @@
-2.274.0
+2.276.1