Appendix A - License file compression and encoding PowerShell helper function

function ConvertTo-CompressedBase64String {
      [CmdletBinding()]
      Param (
          [Parameter(Mandatory)]
          [ValidateScript( {
              if (-Not ($_ | Test-Path) ) {
                  throw "The file or folder $_ does not exist"
              }
              if (-Not ($_ | Test-Path -PathType Leaf) ) {
                  throw "The Path argument must be a file. Folder paths are not allowed."
              }
              return $true
          })]
      [string] $Path
  )
  $fileBytes = [System.IO.File]::ReadAllBytes($Path)
  [System.IO.MemoryStream] $memoryStream = New-Object System.IO.MemoryStream
  $gzipStream = New-Object System.IO.Compression.GzipStream $memoryStream,([IO.Compression.CompressionMode]::Compress)
  $gzipStream.Write($fileBytes, 0, $fileBytes.Length)
  $gzipStream.Close()
  $memoryStream.Close()
  $compressedFileBytes = $memoryStream.ToArray()
  $encodedCompressedFileData = [Convert]::ToBase64String($compressedFileBytes)
  $gzipStream.Dispose()
  $memoryStream.Dispose()
  return $encodedCompressedFileData
}
ConvertTo-CompressedBase64String -Path .\license.xml