Check if Powershell is running in admin mode before running script (#493)

contrib/win32/openssh/install-sshd.ps1

@@ -3,6 +3,13 @@
 # @manojampalam - removed ntrights.exe dependency
 # @bingbing8 - removed secedit.exe dependency
 
+$ErrorActionPreference = 'Stop'
+
+if (!([bool]([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole] "Administrator")))
+{
+    throw "You must be running as an administrator, please restart as administrator"
+}
+
 $scriptpath = $MyInvocation.MyCommand.Path
 $scriptdir = Split-Path $scriptpath
 
@@ -48,6 +55,7 @@ finally {
 }
 
 # Fix the registry permissions
+If ($PSVersiontable.PSVersion.Major -le 2) {$PSScriptRoot = Split-Path -Parent $MyInvocation.MyCommand.Path}
 Import-Module $PSScriptRoot\OpenSSHUtils -Force
 Enable-Privilege SeRestorePrivilege | out-null
 

contrib/win32/openssh/uninstall-sshd.ps1

@@ -1,4 +1,9 @@
-$scriptpath = $MyInvocation.MyCommand.Path
+if (!([bool]([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole] "Administrator")))
+{
+    throw "You must be running as an administrator, please restart as administrator"
+}
+
+$scriptpath = $MyInvocation.MyCommand.Path
 $scriptdir = Split-Path $scriptpath
 $etwman = Join-Path $scriptdir "openssh-events.man"