functions/System/Hardening/Import-HardeningGPO.ps1
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function Import-HardeningGPO { <# .SYNOPSIS Integrates hardening rules with Group Policy Object (GPO) for domain deployment. .DESCRIPTION Creates or updates Group Policy Objects containing hardening configuration rules. Enables centralized hardening policy deployment across domain-joined systems via Active Directory Group Policy. Supports: - GPO creation from hardening profiles - Computer and User policy configuration - Registry-based rule deployment - Audit policy configuration - Firewall rule distribution - Link to organizational units (OUs) - Domain controller replication Requires: - Active Directory domain membership - Group Policy Management Console (GPMC) installed - Administrative rights on domain controller - Group Policy PowerShell module .PARAMETER Profile Hardening profile to export: Basis, Recommended, Strict. Mandatory. .PARAMETER GPOName Name for created Group Policy Object. Default: "WinHarden-Hardening-{Profile}" .PARAMETER Domain Active Directory domain name (e.g., contoso.com). If omitted, uses current domain. .PARAMETER TargetOU Organizational Unit to link GPO. If omitted, links to domain root. .PARAMETER EnableAudit If specified, enables audit events for policy application. Useful for compliance tracking. .PARAMETER Comment Description for GPO. Default: "WinHarden automated hardening policy" .EXAMPLE Import-HardeningGPO -Profile Recommended -TargetOU "OU=Servers,DC=contoso,DC=com" Creates GPO with Recommended profile and links to Servers OU. .EXAMPLE Import-HardeningGPO -Profile Strict -Domain corp.contoso.com -EnableAudit Creates Strict hardening GPO for specific domain with audit logging. .EXAMPLE Get-HardeningGPO | Where-Object Profile -eq 'Basis' List all Basis hardening GPOs in domain. .NOTES DEPENDENCIES: Write-Log (Core), Group Policy PowerShell module REQUIRES: Domain Admin rights, GPMC installed ACTIVE DIRECTORY: Domain-joined system required REPLICATION: GPO replicates to all DCs (may take time) #> [CmdletBinding(SupportsShouldProcess)] param( [Parameter(Mandatory = $true)] [ValidateSet('Basis', 'Recommended', 'Strict')] [string] $Profile, [Parameter(Mandatory = $false)] [string] $GPOName = "WinHarden-Hardening-$Profile", [Parameter(Mandatory = $false)] [string] $Domain, [Parameter(Mandatory = $false)] [string] $TargetOU, [switch] $EnableAudit, [Parameter(Mandatory = $false)] [string] $Comment = "WinHarden automated hardening policy" ) $ErrorActionPreference = 'Stop' try { Write-Log -Message "Importing hardening profile to GPO: Profile=$Profile, GPO=$GPOName" -Level Info if ($PSCmdlet.ShouldProcess($GPOName, "Create and configure hardening GPO")) { # Validate prerequisites if (-not (Get-Module GroupPolicy -ErrorAction SilentlyContinue)) { if (-not (Import-Module GroupPolicy -PassThru -ErrorAction SilentlyContinue)) { throw "Group Policy module not available. Install GPMC on domain-joined system." } } # Determine domain if (-not $Domain) { $Domain = (Get-ADDomain -ErrorAction SilentlyContinue).DNSRoot if (-not $Domain) { throw "Not domain-joined. Specify -Domain parameter." } } # Get hardening profile data $profilePath = Join-Path -Path (Split-Path -Path $PSScriptRoot -Parent) -ChildPath "Hardening.Profiles\$Profile.psd1" $profileData = Import-PowerShellDataFile -Path $profilePath if (-not $profileData) { throw "Failed to load hardening profile: $profilePath" } # Create GPO Write-Verbose "Creating Group Policy Object: $GPOName" $gpo = New-GPO -Name $GPOName -Comment $Comment -Domain $Domain if (-not $gpo) { throw "Failed to create GPO" } # Configure Registry policies _ApplyRegistryPoliciesToGPO -GPO $gpo -Rules $profileData.Rules -Domain $Domain # Configure Audit policies if ($EnableAudit) { _ApplyAuditPoliciesToGPO -GPO $gpo -Rules $profileData.Rules -Domain $Domain } # Link GPO to OU if specified if ($TargetOU) { Write-Verbose "Linking GPO to OU: $TargetOU" New-GPLink -Name $GPOName -Target $TargetOU -Domain $Domain -LinkEnabled Yes | Out-Null } Write-Log -Message "Hardening GPO created and configured: $GPOName" -Level Info $gpo } } catch { Write-ErrorLog -Message "Failed to import hardening to GPO: $($_.Exception.Message)" -Caller $MyInvocation.MyCommand.Name throw } } function _ApplyRegistryPoliciesToGPO { <# .SYNOPSIS Internal helper: Applies registry hardening policies to a Group Policy Object for domain deployment. .NOTES INTERNAL USE ONLY: Filters rules by Type='Registry' and applies via Set-GPRegistryValue. Requires Group Policy module and Domain Admin rights. #> param( [object]$GPO, [array]$Rules, [string]$Domain ) $registryRules = @($Rules | Where-Object { $_.Type -eq 'Registry' }) if ($registryRules.Count -eq 0) { return } Write-Verbose "Applying $($registryRules.Count) registry rules to GPO" foreach ($rule in $registryRules) { $regDef = $rule.RuleDefinition if ($regDef.ContainsKey('Path') -and $regDef.ContainsKey('Name')) { $path = $regDef.Path $name = $regDef.Name $value = $regDef.Value # Set registry policy in GPO Set-GPRegistryValue -Guid $GPO.Id -Key $path -ValueName $name -Value $value -Type DWord ` -Domain $Domain | Out-Null } } } function _ApplyAuditPoliciesToGPO { <# .SYNOPSIS Internal helper: Applies audit policy rules to a Group Policy Object. .NOTES INTERNAL USE ONLY: Filters rules by Type='Audit' and logs audit policy application. Logs each audit policy for GPO application (simplified implementation). #> param( [object]$GPO, [array]$Rules, [string]$Domain ) $auditRules = @($Rules | Where-Object { $_.Type -eq 'Audit' }) if ($auditRules.Count -eq 0) { return } Write-Verbose "Applying $($auditRules.Count) audit policies to GPO" # Create audit policy configuration in GPO # Note: This is a simplified version - full implementation would require # more detailed audit policy management foreach ($rule in $auditRules) { Write-Log -Message "Audit policy $($rule.Name) will be applied via GPO" -Level Info } } function Get-HardeningGPO { <# .SYNOPSIS Lists all WinHarden hardening GPOs in the domain. #> [CmdletBinding()] param( [Parameter(Mandatory = $false)] [string] $Domain, [Parameter(Mandatory = $false)] [ValidateSet('Basis', 'Recommended', 'Strict')] [string] $Profile ) $ErrorActionPreference = 'Stop' try { if (-not $Domain) { $Domain = (Get-ADDomain -ErrorAction SilentlyContinue).DNSRoot } $gpos = Get-GPO -All -Domain $Domain -ErrorAction SilentlyContinue | ` Where-Object { $_.DisplayName -like "WinHarden-Hardening*" } if ($Profile) { $gpos = $gpos | Where-Object { $_.DisplayName -like "*$Profile*" } } $gpos } catch { Write-ErrorLog -Message "Failed to retrieve hardening GPOs: $($_.Exception.Message)" -Caller $MyInvocation.MyCommand.Name throw } } |