Add initial PowerShell script for activation

offline.bak

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+# This script is hosted on https://get.activated.win for https://massgrave.dev
+
+# Having trouble launching this script? Check https://massgrave.dev for help.
+
+if (-not $args) {
+    Write-Host ''
+    Write-Host 'Need help? Check our homepage: ' -NoNewline
+    Write-Host 'https://massgrave.dev' -ForegroundColor Green
+    Write-Host ''
+}
+
+& {
+    $psv = (Get-Host).Version.Major
+    $troubleshoot = 'https://massgrave.dev/troubleshoot'
+
+    if ($ExecutionContext.SessionState.LanguageMode.value__ -ne 0) {
+        $ExecutionContext.SessionState.LanguageMode
+        Write-Host "PowerShell is not running in Full Language Mode."
+        Write-Host "Help - https://gravesoft.dev/fix_powershell" -ForegroundColor White -BackgroundColor Blue
+        return
+    }
+
+    try {
+        [void][System.AppDomain]::CurrentDomain.GetAssemblies(); [void][System.Math]::Sqrt(144)
+    }
+    catch {
+        Write-Host "Error: $($_.Exception.Message)" -ForegroundColor Red
+        Write-Host "Powershell failed to load .NET command."
+        Write-Host "Help - https://gravesoft.dev/in-place_repair_upgrade" -ForegroundColor White -BackgroundColor Blue
+        return
+    }
+
+    function Check3rdAV {
+        $cmd = if ($psv -ge 3) { 'Get-CimInstance' } else { 'Get-WmiObject' }
+        $avList = & $cmd -Namespace root\SecurityCenter2 -Class AntiVirusProduct | Where-Object { $_.displayName -notlike '*windows*' } | Select-Object -ExpandProperty displayName
+
+        if ($avList) {
+            Write-Host '3rd party Antivirus might be blocking the script - ' -ForegroundColor White -BackgroundColor Blue -NoNewline
+            Write-Host " $($avList -join ', ')" -ForegroundColor DarkRed -BackgroundColor White
+        }
+    }
+
+    function CheckFile {
+        param ([string]$FilePath)
+        if (-not (Test-Path $FilePath)) {
+            Check3rdAV
+            Write-Host "Failed to create MAS file in temp folder, aborting!"
+            Write-Host "Help - $troubleshoot" -ForegroundColor White -BackgroundColor Blue
+            throw
+        }
+    }
+
+    try { [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12 } catch {}
+
+    $URLs = @(
+        'https://raw.githubusercontent.com/massgravel/Microsoft-Activation-Scripts/da0b2800d9c783e63af33a6178267ac2201adb2a/MAS/All-In-One-Version-KL/MAS_AIO.cmd',
+        'https://dev.azure.com/massgrave/Microsoft-Activation-Scripts/_apis/git/repositories/Microsoft-Activation-Scripts/items?path=/MAS/All-In-One-Version-KL/MAS_AIO.cmd&versionType=Commit&version=da0b2800d9c783e63af33a6178267ac2201adb2a',
+        'https://git.activated.win/Microsoft-Activation-Scripts/plain/MAS/All-In-One-Version-KL/MAS_AIO.cmd?id=da0b2800d9c783e63af33a6178267ac2201adb2a'
+    )
+    Write-Progress -Activity "Downloading..." -Status "Please wait"
+    $errors = @()
+    foreach ($URL in $URLs | Sort-Object { Get-Random }) {
+        try {
+            if ($psv -ge 3) {
+                $response = Invoke-RestMethod $URL
+            }
+            else {
+                $w = New-Object Net.WebClient
+                $response = $w.DownloadString($URL)
+            }
+            break
+        }
+        catch {
+            $errors += $_
+        }
+    }
+    Write-Progress -Activity "Downloading..." -Status "Done" -Completed
+
+    if (-not $response) {
+        Check3rdAV
+        foreach ($err in $errors) {
+            Write-Host "Error: $($err.Exception.Message)" -ForegroundColor Red
+        }
+        Write-Host "Failed to retrieve MAS from any of the available repositories, aborting!"
+        Write-Host "Check if antivirus or firewall is blocking the connection."
+        Write-Host "Help - $troubleshoot" -ForegroundColor White -BackgroundColor Blue
+        return
+    }
+
+    # Verify script integrity
+    $releaseHash = '22D51870447129A730A66887C6E48B83B4B8B230CDC10E24597BA1CB0F471864'
+    $stream = New-Object IO.MemoryStream
+    $writer = New-Object IO.StreamWriter $stream
+    $writer.Write($response)
+    $writer.Flush()
+    $stream.Position = 0
+    $hash = [BitConverter]::ToString([Security.Cryptography.SHA256]::Create().ComputeHash($stream)) -replace '-'
+    if ($hash -ne $releaseHash) {
+        Write-Warning "Hash ($hash) mismatch, aborting!`nReport this issue at $troubleshoot"
+        $response = $null
+        return
+    }
+
+    # Check for AutoRun registry which may create issues with CMD
+    $paths = "HKCU:\SOFTWARE\Microsoft\Command Processor", "HKLM:\SOFTWARE\Microsoft\Command Processor"
+    foreach ($path in $paths) { 
+        if (Get-ItemProperty -Path $path -Name "Autorun" -ErrorAction SilentlyContinue) { 
+            Write-Warning "Autorun registry found, CMD may crash! `nManually copy-paste the below command to fix...`nRemove-ItemProperty -Path '$path' -Name 'Autorun'"
+        } 
+    }
+
+    $rand = [Guid]::NewGuid().Guid
+    $isAdmin = [bool]([Security.Principal.WindowsIdentity]::GetCurrent().Groups -match 'S-1-5-32-544')
+    $FilePath = if ($isAdmin) { "$env:SystemRoot\Temp\MAS_$rand.cmd" } else { "$env:USERPROFILE\AppData\Local\Temp\MAS_$rand.cmd" }
+    Set-Content -Path $FilePath -Value "@::: $rand `r`n$response"
+    CheckFile $FilePath
+
+    $env:ComSpec = "$env:SystemRoot\system32\cmd.exe"
+    $chkcmd = & $env:ComSpec /c "echo CMD is working"
+    if ($chkcmd -notcontains "CMD is working") {
+        Write-Warning "cmd.exe is not working.`nReport this issue at $troubleshoot"
+    }
+
+    if ($psv -lt 3) {
+        if (Test-Path "$env:SystemRoot\Sysnative") {
+            Write-Warning "Command is running with x86 Powershell, run it with x64 Powershell instead..."
+            return
+        }
+        $p = saps -FilePath $env:ComSpec -ArgumentList "/c """"$FilePath"" -el -qedit $args""" -Verb RunAs -PassThru
+        $p.WaitForExit()
+    }
+    else {
+        saps -FilePath $env:ComSpec -ArgumentList "/c """"$FilePath"" -el $args""" -Wait -Verb RunAs
+    }	
+    CheckFile $FilePath
+
+    $FilePaths = @("$env:SystemRoot\Temp\MAS*.cmd", "$env:USERPROFILE\AppData\Local\Temp\MAS*.cmd")
+    foreach ($FilePath in $FilePaths) { Get-Item $FilePath -ErrorAction SilentlyContinue | Remove-Item }
+} @args
+