xRegistry: Cannot create registry value containing ":" in the path

[mkht]

Description

Attempts to create a registry value with ":" (colons) in the path using the xRegistry resource will fail with an exception.

The DSC configuration that is used to reproduce the issue

Configuration test
{
    Import-DscResource -ModuleName xPSDesiredStateConfiguration

    xRegistry test
    {
        Ensure = 'Present'
        Key = 'HKEY_LOCAL_MACHINE\Software\dsc\mw1.jothgxmws.com:443'
        ValueName = 'TestValue'
        ValueData = '1'
        ValueType = 'DWORD'
        Force = $true
    }
}

Verbose logs showing the problem

詳細: パラメーター ''methodName' = SendConfigurationApply,'className' = MSFT_DSCLocalConfigurationManager,'namespaceName' = root/Microsoft/Windows/DesiredSt
ateConfiguration' を使用して操作 'CimMethod の呼び出し' を実行します。
詳細: コンピューター VM1321A1J、ユーザー SID S-1-5-21-3239056254-3345395085-1586727800-1116 から LCM メソッドが呼び出されました。
詳細: [VM1321A1J]: LCM:  [ 開始     設定       ]
詳細: [VM1321A1J]: LCM:  [ 開始     リソース     ]  [[xRegistry]test]
詳細: [VM1321A1J]: LCM:  [ 開始     テスト      ]  [[xRegistry]test]
詳細: [VM1321A1J]:                            [[xRegistry]test] Test-TargetResource is starting for Registry resource with Key HKEY_LOCAL_MACHINE\Sof
tware\dsc\mw1.jothgxmws.com:443
詳細: [VM1321A1J]:                            [[xRegistry]test] Get-TargetResource is starting for Registry resource with Key HKEY_LOCAL_MACHINE\Soft
ware\dsc\mw1.jothgxmws.com:443
詳細: [VM1321A1J]: LCM:  [ 終了     テスト      ]  [[xRegistry]test]  (0.1540 秒)。
PowerShell DSC リソース DSC_xRegistryResource は Test-TargetResource 機能を実行できませんでした。エラー メッセージ: The registry drive HKEY_LOCAL_MACHINE\Software\dsc\mw1.jot
hgxmws.com:443 is invalid. Please update the Key parameter to include a valid registry drive.
パラメーター名:Key 
    + CategoryInfo          : InvalidOperation: (:) []、CimException
    + FullyQualifiedErrorId : ProviderOperationExecutionFailure
    + PSComputerName        : localhost
 
詳細: [VM1321A1J]: LCM:  [ 終了     設定       ]
SendConfigurationApply 関数が失敗しました。
    + CategoryInfo          : NotSpecified: (root/Microsoft/...gurationManager:String) [], CimException
    + FullyQualifiedErrorId : MI RESULT 1
    + PSComputerName        : localhost
 
詳細: 操作 'CimMethod の呼び出し' が完了しました。
詳細: 構成ジョブが完了するまでにかかった時間は 0.8 秒です

Suggested solution to the issue

The Get-PathRoot function has a problem. It does not returns proper root drive when paths containing colons.

xPSDesiredStateConfiguration/source/DSCResources/DSC_xRegistryResource/DSC_xRegistryResource.psm1

Lines 559 to 581 in efbee5b

	function Get-PathRoot
	{
	[OutputType([System.String])]
	[CmdletBinding()]
	param
	(
	[Parameter(Mandatory = $true)]
	[ValidateNotNullOrEmpty()]
	[System.String]
	$Path
	)
	$pathParent = Split-Path -Path $Path -Parent
	$pathRoot = $Path
	while (-not [System.String]::IsNullOrEmpty($pathParent))
	{
	$pathRoot = Split-Path -Path $pathParent -Leaf
	$pathParent = Split-Path -Path $pathParent -Parent
	}
	return $pathRoot
	}

[mkht]

This issue only occurs if we specify the Common registry style for the root of the path like HKEY_LOCAL_MACHINE\.... and does not occur when specifying a PSDrive style path like HKLM:\....

Sample DSC configuration that has issue.

Configuration test
{
    Import-DscResource -ModuleName xPSDesiredStateConfiguration

    xRegistry test
    {
        Ensure = 'Present'
        Key = 'HKEY_LOCAL_MACHINE\Software\dsc\mw1.jothgxmws.com:443'
        ValueName = 'TestValue'
        ValueData = '1'
        ValueType = 'DWORD'
        Force = $true
    }
}

Sample DSC configuration that has NOT issue.

Configuration test
{
    Import-DscResource -ModuleName xPSDesiredStateConfiguration

    xRegistry test
    {
        Ensure = 'Present'
        Key = 'HKLM:\Software\dsc\mw1.jothgxmws.com:443'
        ValueName = 'TestValue'
        ValueData = '1'
        ValueType = 'DWORD'
        Force = $true
    }
}