# get-bitlockerreport
#
# Simple tool to enumerate all Computers and look for Bitlocker recovery information in the ADSI

# Initialize Hashtable to store Computers found with Bitlocker Information

write-host "get-bitlockercomputer: Start"
$Bitlockerclients = @{}


# Search for GCs to find the Bitlocker information
$RootNC = ([ADSI]"LDAP://RootDSE").rootDomainNamingContext
$objSearcher = [adsisearcher]([ADSI]"GC://$RootNC")
$objSearcher.PageSize = 1000   # enable paging
$objSearcher.filter = "(objectclass=msFVE-RecoveryInformation)"
$objSearcher.SearchScope = "subtree"
$objSearcher.PropertiesToLoad.Clear() | Out-Null   # don't load additional data, because not used

write-host "get-bitlockercomputer: Search for Recovery Information"
[long]$volumes=0
$objSearcher.findall() | % {
	$volumes++
  	$computer = [ADSI](([adsi]($_.path)).parent) # bind to Object using ADSI to get the parent Computer Object name
	$computerdn = $computer.distinguishedname[0]
	Write-Progress -Activity "Adding Computer $computerdn" -status $volumes
	#Write-host $computerdn
	If ($Bitlockerclients.item($computerdn)) {
		$Bitlockerclients.item($computerdn)++
	}
	Else {
		$Bitlockerclients.item($computerdn)=[int]1
	}
}
[long]$totalcomputer = $Bitlockerclients.count
# Find all Computers
write-host " Search for all Computers to generate list"
$objSearcher.filter = "(objectclass=Computer)"
$objSearcher.PropertiesToLoad.Add(“Name”) | Out-Null
$objSearcher.PropertiesToLoad.Add(“distinguishedname”) | Out-Null
$objSearcher.PropertiesToLoad.Add(“dNSHostName”) | Out-Null

[long]$matchcount = 0 
$objSearcher.findall() | % {
	Write-Progress -Activity ("Matching Computer " +$_.properties.name) -status $matchcount -percentcomplete ($matchcount/$totalcomputer*100)
	$result = "" | select computername,dNSHostName,distinguishedname,bitlockervolumes
	if ($_.properties.name) {$result.computername = $_.properties.name[0]}
	if ($_.properties.dnshostname) { $result.dNSHostName = $_.properties.dnshostname[0]}
	$result.distinguishedname = $_.properties.distinguishedname[0]
  	If ($Bitlockerclients.item($_.properties.distinguishedname[0])) {
		$result.bitlockervolumes = $Bitlockerclients.item($_.properties.distinguishedname[0])
		$matchcount++
	}
	else {
		$result.bitlockervolumes = $null
	}
	$result    # send data to pipeline
}
write-host "get-bitlockercomputer: End"