DSCResources/MSFT_xADServicePrincipalName/MSFT_xADServicePrincipalName.psm1
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<# .SYNOPSIS Returns the current state of the specified service principal name. .PARAMETER ServicePrincipalName The full SPN to add or remove, e.g. HOST/LON-DC1. #> function Get-TargetResource { [CmdletBinding()] [OutputType([System.Collections.Hashtable])] param ( [Parameter(Mandatory = $true)] [ValidateNotNullOrEmpty()] [System.String] $ServicePrincipalName ) $spnAccounts = Get-ADObject -Filter { ServicePrincipalName -eq $ServicePrincipalName } -Properties 'SamAccountName' | Select-Object -ExpandProperty 'SamAccountName' if ($spnAccounts.Count -eq 0) { # No SPN found $returnValue = @{ Ensure = 'Absent' ServicePrincipalName = $ServicePrincipalName Account = '' } } else { # One or more SPN(s) found, return the account name(s) $returnValue = @{ Ensure = 'Present' ServicePrincipalName = $ServicePrincipalName Account = $spnAccounts -join ';' } } return $returnValue } <# .SYNOPSIS Add or remove the service principal name. .PARAMETER Ensure Specifies if the service principal name should be added or remove. .PARAMETER ServicePrincipalName The full SPN to add or remove, e.g. HOST/LON-DC1. .PARAMETER Account The user or computer account to add or remove the SPN, e.b. User1 or LON-DC1$. #> function Set-TargetResource { [CmdletBinding()] param ( [Parameter()] [ValidateSet('Present', 'Absent')] [System.String] $Ensure = 'Present', [Parameter(Mandatory = $true)] [ValidateNotNullOrEmpty()] [System.String] $ServicePrincipalName, [Parameter()] [AllowEmptyString()] [System.String] $Account ) # Get all Active Directory object having the target SPN configured. $spnAccounts = Get-ADObject -Filter { ServicePrincipalName -eq $ServicePrincipalName } -Properties 'SamAccountName', 'DistinguishedName' if ($Ensure -eq 'Present') { # Throw an exception, if no account was specified or the account does # not exist. if ([String]::IsNullOrEmpty($Account) -or ($null -eq (Get-ADObject -Filter { SamAccountName -eq $Account }))) { throw "AD object with SamAccountName = '$Account' not found!" } # Remove the SPN(s) from any extra account. foreach ($spnAccount in $spnAccounts) { if ($spnAccount.SamAccountName -ne $Account) { Set-ADObject -Identity $spnAccount.DistinguishedName -Remove @{ ServicePrincipalName = $ServicePrincipalName } } } # Add the SPN to the target account. Use Get-ADObject to get the target # object filtered by SamAccountName. Set-ADObject does not support the # field SamAccountName as Identifier. if ($spnAccounts.SamAccountName -notcontains $Account) { Get-ADObject -Filter { SamAccountName -eq $Account } | Set-ADObject -Add @{ ServicePrincipalName = $ServicePrincipalName } } } # Remove the SPN from any account if ($Ensure -eq 'Absent') { foreach ($spnAccount in $spnAccounts) { Set-ADObject -Identity $spnAccount.DistinguishedName -Remove @{ ServicePrincipalName = $ServicePrincipalName } } } } <# .SYNOPSIS Tests the service principal name. .PARAMETER Ensure Specifies if the service principal name should be added or remove. .PARAMETER ServicePrincipalName The full SPN to add or remove, e.g. HOST/LON-DC1. .PARAMETER Account The user or computer account to add or remove the SPN, e.b. User1 or LON-DC1$. #> function Test-TargetResource { [CmdletBinding()] [OutputType([System.Boolean])] param ( [Parameter()] [ValidateSet('Present', 'Absent')] [System.String] $Ensure = 'Present', [Parameter(Mandatory = $true)] [ValidateNotNullOrEmpty()] [System.String] $ServicePrincipalName, [Parameter()] [AllowEmptyString()] [System.String] $Account ) $currentConfiguration = Get-TargetResource -ServicePrincipalName $ServicePrincipalName $desiredConfigurationMatch = $currentConfiguration.Ensure -eq $Ensure if ($Ensure -eq 'Present') { $desiredConfigurationMatch = $desiredConfigurationMatch -and $currentConfiguration.Account -eq $Account } return $desiredConfigurationMatch } |