Recover SharePoint 2007 / 2010 / 2013 Product Key using PowerShell

Ever wanted to recover your SharePoint 2007 or SharePoint 2010 Product key from an existing SharePoint Farm? Sure! Its encoded and stored in system registry and we can recover the license key with PowerShell. Here is the code:

Here is the PowerShell Script to Recover SharePoint 2007 Product key:

function Get-SP2007ProductKey {    
    $map="BCDFGHJKMPQRTVWXY2346789" 
    $value = (get-itemproperty "HKLM:\SOFTWARE\Microsoft\Office\12.0\Registration\{90120000-110D-0000-1000-0000000FF1CE}").digitalproductid[0x34..0x42]  
    $ProductKey = ""  
    for ($i = 24; $i -ge 0; $i--) { 
      $r = 0 
      for ($j = 14; $j -ge 0; $j--) { 
        $r = ($r * 256) -bxor $value[$j] 
        $value[$j] = [math]::Floor([double]($r/24)) 
        $r = $r % 24 
      } 
      $ProductKey = $map[$r] + $ProductKey 
      if (($i % 5) -eq 0 -and $i -ne 0) { 
        $ProductKey = "-" + $ProductKey 
      } 
    } 
    $ProductKey
} 

#Call the function
Get-SP2007ProductKey 

PowerShell Script to Recover SharePoint 2010 Product Key:

function Get-SP2010ProductKey {    
    $map="BCDFGHJKMPQRTVWXY2346789" 
    $value = (get-itemproperty "HKLM:\SOFTWARE\Microsoft\Office\14.0\Registration\{90140000-110D-0000-1000-0000000FF1CE}").digitalproductid[0x34..0x42]  
    $ProductKey = ""  
    for ($i = 24; $i -ge 0; $i--) { 
      $r = 0 
      for ($j = 14; $j -ge 0; $j--) { 
        $r = ($r * 256) -bxor $value[$j] 
        $value[$j] = [math]::Floor([double]($r/24)) 
        $r = $r % 24 
      } 
      $ProductKey = $map[$r] + $ProductKey 
      if (($i % 5) -eq 0 -and $i -ne 0) { 
        $ProductKey = "-" + $ProductKey 
      } 
    } 
    $ProductKey
} 
#Call the function
Get-SP2010ProductKey

Retrieve SharePoint 2013 Product Key:
For SharePoint 2013, Set the $value parameter in the above code to :

$value = (get-itemproperty "HKLM:\SOFTWARE\Microsoft\Office\15.0\Registration\{90150000-110D-0000-1000-0000000FF1CE}").digitalproductid[0x34..0x42]    

and run the script!

Thanks to http://powershell.com/cs/blogs/tips/archive/2012/04/30/getting-windows-product-key.aspx for the idea!