PoshCode Archive  Artifact [f454528438]

Artifact f4545284382c9c7286772f77dcb4e8ecb028df4cbcf8b48b18a26836b9a9a061:

• File Get-ProductKey.ps1 — part of check-in [06dbbffe33] at 2018-06-10 13:47:05 on branch trunk — From gregs repository on github. (user: greg zakharov size: 1491)

# encoding: ascii
# api: powershell
# title: Get-ProductKey
# description: From greg’s repository on github.
# version: 0.1
# type: function
# author: greg zakharov
# license: CC0
# function: Get-ProductKey
# x-poshcode-id: 4864
# x-archived: 2014-02-09T11:28:50
# x-published: 2014-01-31T06:08:00
#
#
#requires -version 2.0
function Get-ProductKey([String]$Computer = '.') {
  <#
    .NOTES
        Author: greg zakharov
  #>
  
  begin {
    $reg = 'SOFTWARE\Microsoft\Windows NT\CurrentVersion'
    
    function get([Object[]]$obj) {
      begin {
        $map = "BCDFGHJKMPQRTVWXY2346789"
        $key = ""
      }
      process {
        for ($i = 24; $i -ge 0; $i--) {
          $k = 0
          for ($j = 14; $j -ge 0; $j--) {
            $k = ($k * 256) -bxor $obj[$j]
            $obj[$j] = [Math]::Floor([Double]($k / 24))
            $k = $k % 24
          }
          $key = $map[$k] + $key

          if (($i % 5) -eq 0 -and $i -ne 0) {$key = "-" + $key}
        }
      }
      end {$key}
    }
  }
  process {
    try {
      $val = [Byte[]]([wmiclass]('\\' + $Computer + '\root\default:StdRegProv')
          ).GetBinaryValue(2147483650, $reg, 'DigitalProductId').uValue[52..66]
      get $val
    }
    catch [Management.Automation.RuntimeException] {
      if ((Read-Host "Access denied. Get local product key?") -eq 'y') {
        get (gp ('HKLM:\' + $reg)).DigitalProductId[52..66]
      }
    }
  }
  end {}
}