functions/schemadefaultpermissions/Invoke-FMSchemaDefaultPermission.ps1
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function Invoke-FMSchemaDefaultPermission { <# .SYNOPSIS Brings the target forest into compliance with the defined default permissions in its schema. .DESCRIPTION Brings the target forest into compliance with the defined default permissions in its schema. Use the module's configuration settings to govern schema admin credentials. The configuration can be read with Get-PSFConfig and updated with Set-PSFConfig. .PARAMETER InputObject Test results from Test-FMSchemaDefaultPermission to apply. .PARAMETER Server The server / domain to work with. .PARAMETER Credential The credentials to use for this operation. .PARAMETER EnableException This parameters disables user-friendly warnings and enables the throwing of exceptions. This is less user friendly, but allows catching exceptions in calling scripts. .PARAMETER Confirm If this switch is enabled, you will be prompted for confirmation before executing any operations that change state. .PARAMETER WhatIf If this switch is enabled, no actions are performed but informational messages will be displayed that explain what would happen if the command were to run. .EXAMPLE PS C:\> Invoke-FMSchemaDefaultPermission -Server contoso.com Brings the contoso.com forest into compliance with the defined default permissions in its schema. #> [Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSUseUsingScopeModifierInNewRunspaces", "")] [Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSUseDeclaredVarsMoreThanAssignments", "")] [CmdletBinding(SupportsShouldProcess = $true, ConfirmImpact = 'Medium')] Param ( [Parameter(ValueFromPipeline = $true)] $InputObject, [PSFComputer] $Server, [PSCredential] $Credential, [switch] $EnableException ) begin { #region Utility Functions function Add-AccessRule { [Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSUseUsingScopeModifierInNewRunspaces", "")] [CmdletBinding()] param ( $Change, $Session, [Hashtable] $Tracking ) Invoke-Command -Session $Session -ArgumentList $Change -ScriptBlock { param ($Change) $rule = New-Object System.DirectoryServices.ActiveDirectoryAccessRule( [System.Security.Principal.SecurityIdentifier]$Change.Configuration.Principal, $Change.Configuration.ActiveDirectoryRights, $Change.Configuration.AccessControlType, $Change.Configuration.ObjectTypeGuid, $Change.Configuration.InheritanceType, $Change.Configuration.InheritedObjectTypeGuid ) $null = $acl.AddAccessRule($rule) } -ErrorAction Stop $Tracking[$Change] = $Change } function Remove-AccessRule { [Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSUseUsingScopeModifierInNewRunspaces", "")] [Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSUseShouldProcessForStateChangingFunctions", "")] [CmdletBinding()] param ( $Change, $Session, [Hashtable] $Tracking ) Invoke-Command -Session $Session -ArgumentList $Change -ScriptBlock { param ($Change) $rules = $acl.GetAccessRules($true, $true, [System.Security.Principal.SecurityIdentifier]) foreach ($rule in $rules) { if ($rule.ActiveDirectoryRights -ne $Change.ADObject.ActiveDirectoryRights) { continue } if ($rule.InheritanceType -ne $Change.ADObject.InheritanceType) { continue } if ($rule.ObjectType -ne $Change.ADObject.ObjectType) { continue } if ($rule.InheritedObjectType -ne $Change.ADObject.InheritedObjectType) { continue } if ($rule.AccessControlType -ne $Change.ADObject.AccessControlType) { continue } if ("$($rule.IdentityReference)" -ne "$($Change.ADObject.IdentityReference)") { continue } $null = $acl.RemoveAccessRule($rule) } } -ErrorAction Stop $Tracking[$Change] = $Change } function Write-SchemaDefaultPermission { [Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSUseUsingScopeModifierInNewRunspaces", "")] [CmdletBinding()] param ( $Session, [hashtable] $SchemaParameters ) $newSddl, $schemaObjectDN = Invoke-Command -Session $Session -ScriptBlock { $acl.Sddl, $schemaObject.DistinguishedName } Set-ADObject @SchemaParameters -Identity $schemaObjectDN -Replace @{ defaultSecurityDescriptor = $newSddl } -ErrorAction Stop } #endregion Utility Functions $parameters = $PSBoundParameters | ConvertTo-PSFHashtable -Include Server, Credential $parameters['Debug'] = $false Assert-ADConnection @parameters -Cmdlet $PSCmdlet Invoke-Callback @parameters -Cmdlet $PSCmdlet Assert-Configuration -Type SchemaDefaultPermissions -Cmdlet $PSCmdlet try { $rootDSE = Get-ADRootDSE @parameters -ErrorAction Stop } catch { Stop-PSFFunction -String 'Invoke-FMSchemaDefaultPermission.Connect.Failed' -StringValues $Server -ErrorRecord $_ -EnableException $EnableException -Exception $_.Exception.GetBaseException() return } $forest = Get-ADForest @parameters $parameters["Server"] = $forest.SchemaMaster #region WinRM Invoke-PSFProtectedCommand -ActionString 'Invoke-FMSchemaDefaultPermission.WinRM.Connect' -Target $forest.SchemaMaster -ScriptBlock { $psParameters = $parameters.Clone() $psParameters.Remove('Server') $psParameters.ComputerName = $forest.SchemaMaster $session = New-PSSession @psParameters -ErrorAction Stop } -EnableException $EnableException -PSCmdlet $PSCmdlet -WhatIf:$false -Confirm:$false #endregion WinRM #region Resolve Credentials $cred = $null $schemaParameters = $parameters.Clone() Invoke-PSFProtectedCommand -ActionString 'Invoke-FMSchemaDefaultPermission.Schema.Credentials' -Target $forest.SchemaMaster -ScriptBlock { [PSCredential]$cred = Get-SchemaAdminCredential @parameters | Write-Output | Select-Object -First 1 if ($cred) { $schemaParameters['Credential'] = $cred } } -EnableException $EnableException -PSCmdlet $PSCmdlet if (Test-PSFFunctionInterrupt) { return } $null = Invoke-PSFProtectedCommand -ActionString 'Invoke-FMSchemaDefaultPermission.Credentials.Test' -Target $forest.SchemaMaster -ScriptBlock { $null = Get-ADDomain @schemaParameters -ErrorAction Stop } -EnableException $EnableException -PSCmdlet $PSCmdlet -RetryCount 5 -RetryWait 1 if (Test-PSFFunctionInterrupt) { return } #endregion Resolve Credentials } process { if (Test-PSFFunctionInterrupt) { return } if (-not $InputObject) { $InputObject = Test-FMSchemaDefaultPermission @parameters -EnableException:$EnableException } foreach ($testItem in $InputObject) { # Catch invalid input - can only process test results if ($testItem.PSObject.TypeNames -notcontains 'ForestManagement.SchemaDefaultPermission.TestResult') { Stop-PSFFunction -String 'General.Invalid.Input' -StringValues 'Test-FMSchemaDefaultPermission', $testItem -Target $testItem -Continue -EnableException $EnableException } switch ($testItem.Type) { 'Update' { #region Load Acl from SDDL Invoke-Command -Session $session -ArgumentList $rootDSE.schemaNamingContext, $testItem.Identity -ScriptBlock { param ($SchemaNC, $ClassName) $schemaObject = Get-ADObject -Server localhost -SearchBase $SchemaNC -LDAPFilter "(name=$ClassName)" -Properties defaultSecurityDescriptor $acl = New-Object System.DirectoryServices.ActiveDirectorySecurity $acl.SetSecurityDescriptorSddlForm($schemaObject.defaultSecurityDescriptor) } #endregion Load Acl from SDDL #region Apply individual changes to in-memory ACL $tracking = @{ } # Apply remove changes foreach ($change in $testItem.Changed) { if ($change.Type -ne 'Remove') { continue } Invoke-PSFProtectedCommand -ActionString 'Invoke-FMSchemaDefaultPermission.AccessRule.Remove' -ActionStringValues $change.Identity, $change.Privilege, $change.Access -Target $testItem -ScriptBlock { Remove-AccessRule -Change $change -Session $session -Tracking $tracking -ErrorAction Stop } -EnableException $EnableException -PSCmdlet $PSCmdlet -Continue -Tag invoke } # Apply add changes foreach ($change in $testItem.Changed) { if ($change.Type -ne 'Add') { continue } Invoke-PSFProtectedCommand -ActionString 'Invoke-FMSchemaDefaultPermission.AccessRule.Add' -ActionStringValues $change.Identity, $change.Privilege, $change.Access -Target $testItem -ScriptBlock { Add-AccessRule -Change $change -Session $session -Tracking $tracking -ErrorAction Stop } -EnableException $EnableException -PSCmdlet $PSCmdlet -Continue -Tag invoke } #endregion Apply individual changes to in-memory ACL # Write SDDL back to schema object Invoke-PSFProtectedCommand -ActionString 'Invoke-FMSchemaDefaultPermission.Permissions.Update' -ActionStringValues $tracking.Count, $testItem.Changed.Count, $testItem.Identity -Target $testItem -ScriptBlock { Write-SchemaDefaultPermission -Session $session -SchemaParameters $schemaParameters -ErrorAction Stop } -EnableException $EnableException -PSCmdlet $PSCmdlet -Continue -Tag invoke } 'NotFound' { Write-PSFMessage -Level Warning -String 'Invoke-FMSchemaDefaultPermission.NotFound' -StringValues $testItem.Identity -Target $testItem } 'IdentityError' { Write-PSFMessage -Level Warning -String 'Invoke-FMSchemaDefaultPermission.IdentityError' -StringValues $testItem.Identity -Target $testItem } } } } end { if ($session) { Remove-PSSession -Session $session -ErrorAction Ignore -WhatIf:$false -Confirm:$false } if (Test-PSFFunctionInterrupt) { return } Invoke-PSFProtectedCommand -ActionString 'Invoke-FMSchemaDefaultPermission.Schema.Credentials.Release' -Target $forest.SchemaMaster -ScriptBlock { $null = Remove-SchemaAdminCredential @parameters -ErrorAction Stop } -EnableException $EnableException.ToBool() -PSCmdlet $PSCmdlet } } |