ADCSTemplate.psm1
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#requires -Version 5.0 -Modules ActiveDirectory Function Get-RandomHex { param ([int]$Length) $Hex = '0123456789ABCDEF' [string]$Return = $null For ($i=1;$i -le $length;$i++) { $Return += $Hex.Substring((Get-Random -Minimum 0 -Maximum 16),1) } Return $Return } Function IsUniqueOID { param ($cn,$TemplateOID,$Server,$ConfigNC) $Search = Get-ADObject -Server $Server ` -SearchBase "CN=OID,CN=Public Key Services,CN=Services,$ConfigNC" ` -Filter {cn -eq $cn -and msPKI-Cert-Template-OID -eq $TemplateOID} If ($Search) {$False} Else {$True} } Function New-TemplateOID { Param($Server,$ConfigNC) <# OID CN/Name [10000000-99999999].[32 hex characters (MD5hash)] OID msPKI-Cert-Template-OID [Forest base OID].[1000000-99999999].[10000000-99999999] <--- second number same as first number in OID name #> do { $OID_Part_1 = Get-Random -Minimum 10000000 -Maximum 99999999 $OID_Part_2 = Get-Random -Minimum 10000000 -Maximum 99999999 $OID_Part_3 = Get-RandomHex -Length 32 $OID_Forest = Get-ADObject -Server $Server ` -Identity "CN=OID,CN=Public Key Services,CN=Services,$ConfigNC" ` -Properties msPKI-Cert-Template-OID | Select-Object -ExpandProperty msPKI-Cert-Template-OID $msPKICertTemplateOID = "$OID_Forest.$OID_Part_1.$OID_Part_2" $Name = "$OID_Part_2.$OID_Part_3" } until (IsUniqueOID -cn $Name -TemplateOID $msPKICertTemplateOID -Server $Server -ConfigNC $ConfigNC) Return @{ TemplateOID = $msPKICertTemplateOID TemplateName = $Name } } <# .SYNOPSIS Returns the properties of either a single or all Active Directory Certificate Template(s). .DESCRIPTION Returns the properties of either a single or list of Active Directory Certificate Template(s) depending on whether a DisplayName parameter was passed. .PARAMETER DisplayName Name of an AD CS template to retrieve. .PARAMETER Server FQDN of Active Directory Domain Controller to target for the operation. When not specified it will search for the nearest Domain Controller. .EXAMPLE PS C:\> Get-ADCSTemplate .EXAMPLE PS C:\> Get-ADCSTemplate -DisplayName PowerShellCMS .EXAMPLE PS C:\> Get-ADCSTemplate | Sort-Object Name | ft Name, Created, Modified .EXAMPLE PS C:\> ###View template permissions (Get-ADCSTemplate pscms).nTSecurityDescriptor (Get-ADCSTemplate pscms).nTSecurityDescriptor.Sddl (Get-ADCSTemplate pscms).nTSecurityDescriptor.Access ConvertFrom-SddlString -Sddl (Get-ADCSTemplate pscms).nTSecurityDescriptor.sddl -Type ActiveDirectoryRights .NOTES Requires Enterprise Administrator permissions, since this touches the AD Configuration partition. #> Function Get-ADCSTemplate { param( [parameter(Position=0)] [string] $DisplayName, [string] $Server = (Get-ADDomainController -Discover -ForceDiscover -Writable).HostName[0] ) If ($PSBoundParameters.ContainsKey('DisplayName')) { $LDAPFilter = "(&(objectClass=pKICertificateTemplate)(displayName=$DisplayName))" } Else { $LDAPFilter = '(objectClass=pKICertificateTemplate)' } $ConfigNC = $((Get-ADRootDSE -Server $Server).configurationNamingContext) $TemplatePath = "CN=Certificate Templates,CN=Public Key Services,CN=Services,$ConfigNC" Get-ADObject -SearchScope Subtree -SearchBase $TemplatePath -LDAPFilter $LDAPFilter -Properties * -Server $Server } <# .SYNOPSIS Adds an ACL to an Active Directory Certificate template. .DESCRIPTION Adds an ACL to an Active Directory Certificate template. Default permission is read (without the Enroll or AutoEnroll switches). .PARAMETER DisplayName Name of an AD CS template to receive the ACL. .PARAMETER Server FQDN of Active Directory Domain Controller to target for the operation. When not specified it will search for the nearest Domain Controller. .PARAMETER Type ACL type: Allow or Deny .PARAMETER Identity String or string array of Active Directory identities (users or groups) .PARAMETER Enroll Set the Enroll permission .PARAMETER AutoEnroll Set the AutoEnroll permission .EXAMPLE PS C:\> Set-ADCSTemplateACL -DisplayName PowerShellCMS -Type Allow -Identity 'CONTOSO\Servers Group' -Enroll .EXAMPLE PS C:\> Set-ADCSTemplateACL -DisplayName PowerShellCMS -Type Allow -Identity 'CONTOSO\Servers Group','CONTOSO\Workstations Group' -Enroll -AutoEnroll .EXAMPLE PS C:\> Set-ADCSTemplateACL -DisplayName PowerShellCMS -Type Deny -Identity 'CONTOSO\Servers Group' .NOTES Requires Enterprise Administrator permissions, since this touches the AD Configuration partition. #> Function Set-ADCSTemplateACL { param( [parameter(Mandatory)] [string]$DisplayName, [string]$Server = (Get-ADDomainController -Discover -ForceDiscover -Writable).HostName[0], [ValidateSet('Allow','Deny')] [string]$Type = 'Allow', [string[]]$Identity, [switch]$Enroll, [switch]$AutoEnroll ) ## Potential issue here that the AD: drive may not be targetting the selected DC in the -SERVER parameter $TemplatePath = "AD:\" + (Get-ADCSTemplate -DisplayName $DisplayName -Server $Server).DistinguishedName $acl = Get-ACL $TemplatePath $InheritedObjectType = [GUID]'00000000-0000-0000-0000-000000000000' ForEach ($Group in $Identity) { $account = New-Object System.Security.Principal.NTAccount($Group) $sid = $account.Translate([System.Security.Principal.SecurityIdentifier]) If ($Type -ne 'Deny') { # Read, but only if Allow $ObjectType = [GUID]'00000000-0000-0000-0000-000000000000' $ace = New-Object System.DirectoryServices.ActiveDirectoryAccessRule ` $sid, 'GenericRead', $Type, $ObjectType, 'None', $InheritedObjectType $acl.AddAccessRule($ace) } If ($Enroll) { $ObjectType = [GUID]'0e10c968-78fb-11d2-90d4-00c04f79dc55' $ace = New-Object System.DirectoryServices.ActiveDirectoryAccessRule ` $sid, 'ExtendedRight', $Type, $ObjectType, 'None', $InheritedObjectType $acl.AddAccessRule($ace) } If ($AutoEnroll) { $ObjectType = [GUID]'a05b8cc2-17bc-4802-a710-e7c15ab866a2' $ace = New-Object System.DirectoryServices.ActiveDirectoryAccessRule ` $sid, 'ExtendedRight', $Type, $ObjectType, 'None', $InheritedObjectType $acl.AddAccessRule($ace) } } Set-ACL $TemplatePath -AclObject $acl } <# .SYNOPSIS Returns a JSON string with the properties of an Active Directory certificate template. .DESCRIPTION Returns a JSON string with the properties of an Active Directory certificate template. By default returns only the PKI-related properties of the object. These properties are sufficient for passing to the New-ADCSTemplate function. .PARAMETER DisplayName DisplayName for the certificate to export. .PARAMETER Server FQDN of Active Directory Domain Controller to target for the operation. When not specified it will search for the nearest Domain Controller. .PARAMETER Detailed Includes all ADObject properties of the template. These are not required for use with the New-ADCSTemplate function. .NOTES C.R.U.D. AD CS Template Operations in this module. No longer have to use the cert GUI to clone a template and build a new one. Create one manually the first time in the GUI, then export it to JSON. Pass the JSON in your new environment (file, here string, DSC, etc.) to build from scratch. Requires Enterprise Administrator permissions, since this touches the AD Configuration partition. .EXAMPLE PS C:\> Export-ADCSTemplate -DisplayName PowerShellCMS .EXAMPLE PS C:\> Export-ADCSTemplate -DisplayName PowerShellCMS -Detailed .EXAMPLE ### Backup all the templates to JSON md C:\ADCSTemplates -ErrorAction SilentlyContinue cd C:\ADCSTemplates (Get-ADCSTemplate).name | ForEach-Object {"Exporting $_"; Export-ADCSTemplate -DisplayName $_ | Out-File .\$_.json -Force} dir .EXAMPLE PS C:\> New-ADCSTemplate -DisplayName PowerShellCMS-NEW -JSON (Export-ADCSTemplate -DisplayName PowerShellCMS-OLD) #> Function Export-ADCSTemplate { param( [parameter(Mandatory)] [string]$DisplayName, [string]$Server = (Get-ADDomainController -Discover -ForceDiscover -Writable).HostName[0], [switch]$Detailed # Detailed output is not required for export/import. Use for documentation/backup purposes. ) If ($Detailed) { Get-ADCSTemplate -DisplayName $DisplayName -Server $Server | ConvertTo-Json } Else { Get-ADCSTemplate -DisplayName $DisplayName -Server $Server | Select-Object -Property name, displayName, objectClass, flags, revision, *pki* | ConvertTo-Json } } <# .SYNOPSIS Creates a new Active Directory Certificate Services template based on a JSON export. .DESCRIPTION Creates a new Active Directory Certificate Services template based on a JSON export. Optionally can permission and publish the template (best practice). .PARAMETER DisplayName DisplayName for the certificate template to create. This does not have to match the original name of the exported template. .PARAMETER JSON JSON string output from Export-ADCSTemplate. Defines the template to create. Can be retrieved from file using Get-Content -Raw. .PARAMETER Server FQDN of Active Directory Domain Controller to target for the operation. When not specified it will search for the nearest Domain Controller. .PARAMETER Identity String or string array of Active Directory identities (users or groups). This is optional for permissioning the template. .PARAMETER AutoEnroll Default permission is Read and Enroll. Use this switch to also grant AutoEnroll to the identity. Only used when Identity parameter is used. .PARAMETER Publish Publish the template to *ALL* Certificate Authority issuers. Use with caution in production environments. You may want to manually publish to only specific Certificate Authorities in production. In a lab this is ideal. .NOTES This function does not use the official (complicated) API for PKI management. Instead it creates the exact same AD objects that are generated by the API, including AD forest-specific OIDs. Requires Enterprise Administrator permissions, since this touches the AD Configuration partition. .EXAMPLE PS C:\> New-ADCSTemplate -DisplayName PowerShellCMS -JSON (Get-Content .\pscms.json -Raw) .EXAMPLE PS C:\> New-ADCSTemplate -DisplayName PowerShellCMS -JSON (Get-Content .\pscms.json -Raw) -Server dc1.contoso.com -Identity G_DSCNodes -AutoEnroll -Publish # From a client configured for AD CS autoenrollment: $Req = @{ Template = 'PowerShellCMS' Url = 'ldap:' CertStoreLocation = 'Cert:\LocalMachine\My' } Get-Certificate @Req # Note: If you have the Carbon module installed, it conflicts with Get-Certificate native cmdlet. $DocEncrCert = (dir Cert:\LocalMachine\My -DocumentEncryptionCert | Sort-Object NotBefore)[-1] Protect-CmsMessage -To $DocEncrCert -Content "Encrypted with my new cert from the new template!" .EXAMPLE PS C:\> New-ADCSTemplate -DisplayName PowerShellCMS-NEW -JSON (Export-ADCSTemplate -DisplayName PowerShellCMS-OLD) #> Function New-ADCSTemplate { param( [parameter(Mandatory)] [string]$DisplayName, # name in JSON export is ignored [parameter(Mandatory)] [string]$JSON, [string]$Server = (Get-ADDomainController -Discover -ForceDiscover -Writable).HostName[0], [string[]]$Identity, # = "$((Get-ADDomain).NetBIOSName)\Domain Computers", [switch]$AutoEnroll, [switch]$Publish ) ### Put GroupName and AutoEnroll into a parameter set # Manually import AD module to get AD: drive used later for permissions Import-Module ActiveDirectory -Verbose:$false $ConfigNC = $((Get-ADRootDSE -Server $Server).configurationNamingContext) #region CREATE OID <# CN : 14891906.F2AC4390685318BD1D950A66EDB50FF4 DisplayName : TemplateNameHere DistinguishedName : CN=14891906.F2AC4390685318BD1D950A66EDB50FF4,CN=OID,CN=Public Key Services,CN=Services,CN=Configuration,DC=contoso,DC=com dSCorePropagationData : {1/1/1601 12:00:00 AM} flags : 1 instanceType : 4 msPKI-Cert-Template-OID : 1.3.6.1.4.1.311.21.8.11489019.14294623.5588661.594850.12204198.151.6616009.14891906 Name : 14891906.F2AC4390685318BD1D950A66EDB50FF4 ObjectCategory : CN=ms-PKI-Enterprise-Oid,CN=Schema,CN=Configuration,DC=contoso,DC=com ObjectClass : msPKI-Enterprise-Oid #> $OID = New-TemplateOID -Server $Server -ConfigNC $ConfigNC $TemplateOIDPath = "CN=OID,CN=Public Key Services,CN=Services,$ConfigNC" $oa = @{ 'DisplayName' = $DisplayName 'flags' = [System.Int32]'1' 'msPKI-Cert-Template-OID' = $OID.TemplateOID } New-ADObject -Path $TemplateOIDPath -OtherAttributes $oa -Name $OID.TemplateName -Type 'msPKI-Enterprise-Oid' -Server $Server #endregion #region CREATE TEMPLATE # https://docs.microsoft.com/en-us/powershell/dsc/securemof#certificate-requirements # https://blogs.technet.microsoft.com/option_explicit/2012/04/09/pki-certificates-and-the-x-509-standard/ # https://technet.microsoft.com/en-us/library/cc776447(v=ws.10).aspx $import = $JSON | ConvertFrom-Json $oa = @{ 'msPKI-Cert-Template-OID' = $OID.TemplateOID } ForEach ($prop in ($import | Get-Member -MemberType NoteProperty)) { Switch ($prop.Name) { { $_ -in 'flags', 'msPKI-Certificate-Name-Flag', 'msPKI-Enrollment-Flag', 'msPKI-Minimal-Key-Size', 'msPKI-Private-Key-Flag', 'msPKI-Template-Minor-Revision', 'msPKI-Template-Schema-Version', 'msPKI-RA-Signature', 'pKIMaxIssuingDepth', 'pKIDefaultKeySpec', 'revision' } { $oa.Add($_,[System.Int32]$import.$_); break } { $_ -in 'msPKI-Certificate-Application-Policy', 'pKICriticalExtensions', 'pKIDefaultCSPs', 'pKIExtendedKeyUsage' } { $oa.Add($_,[Microsoft.ActiveDirectory.Management.ADPropertyValueCollection]$import.$_); break } { $_ -in 'pKIExpirationPeriod', 'pKIKeyUsage', 'pKIOverlapPeriod' } { $oa.Add($_,[System.Byte[]]$import.$_); break } } } $TemplatePath = "CN=Certificate Templates,CN=Public Key Services,CN=Services,$ConfigNC" New-ADObject -Path $TemplatePath -OtherAttributes $oa -Name $DisplayName.Replace(' ','') ` -DisplayName $DisplayName -Type pKICertificateTemplate -Server $Server #endregion #region PERMISSIONS ## Potential issue here that the AD: drive may not be targetting the selected DC in the -SERVER parameter If ($PSBoundParameters.ContainsKey('Identity')) { If ($AutoEnroll) { Set-ADCSTemplateACL -DisplayName $DisplayName -Server $Server -Type Allow -Identity $Identity -Enroll -AutoEnroll } Else { Set-ADCSTemplateACL -DisplayName $DisplayName -Server $Server -Type Allow -Identity $Identity -Enroll } } #endregion #region ISSUE If ($Publish) { ### WARNING: Issues on all available CAs. Test in your environment. $EnrollmentPath = "CN=Enrollment Services,CN=Public Key Services,CN=Services,$ConfigNC" $CAs = Get-ADObject -SearchBase $EnrollmentPath -SearchScope OneLevel -Filter * -Server $Server ForEach ($CA in $CAs) { Set-ADObject -Identity $CA.DistinguishedName -Add @{certificateTemplates=$DisplayName.Replace(' ','')} -Server $Server } } #endregion } <# .SYNOPSIS Removes a certificate template from Active Directory. .DESCRIPTION Removes the template from any issuers where it is published. Removes the template itself. Removes the unique OID object of the template. .PARAMETER DisplayName DisplayName for the certificate template to delete. .PARAMETER Server FQDN of Active Directory Domain Controller to target for the operation. When not specified it will search for the nearest Domain Controller. .EXAMPLE PS C:\> Remove-ADCSTemplate -DisplayName PowerShellCMS .EXAMPLE PS C:\> (Get-ADCSTemplate).name | Where-Object {$_ -like "PowerShellCMS*"} | ForEach-Object {Remove-ADCSTemplate -DisplayName $_ -Verbose} .NOTES Use with caution! Requires Enterprise Administrator permissions, since this touches the AD Configuration partition. #> Function Remove-ADCSTemplate { [CmdletBinding(SupportsShouldProcess=$true,ConfirmImpact='High')] param( [parameter(Mandatory)] [string]$DisplayName, [string]$Server = (Get-ADDomainController -Discover -ForceDiscover -Writable).HostName[0] ) if ($pscmdlet.ShouldProcess($DisplayName, 'Remove certificate template')) { $ConfigNC = $((Get-ADRootDSE -Server $Server).configurationNamingContext) $Template = Get-ADCSTemplate -DisplayName $DisplayName -Server $Server #region REMOVE ISSUE IF IT EXISTS $EnrollmentPath = "CN=Enrollment Services,CN=Public Key Services,CN=Services,$ConfigNC" $CAs = Get-ADObject -SearchBase $EnrollmentPath -SearchScope OneLevel -Filter * -Server $Server ForEach ($CA in $CAs) { Set-ADObject -Identity $CA.DistinguishedName -Remove @{certificateTemplates=$Template.cn} -Server $Server -Confirm:$false } #endregion #region REMOVE TEMPLATE Remove-ADObject -Identity $Template.distinguishedName -Server $Server -Confirm:$false #endregion #region REMOVE OID $TemplateOIDPath = "CN=OID,CN=Public Key Services,CN=Services,$ConfigNC" Get-ADObject -SearchBase $TemplateOIDPath -LDAPFilter "(DisplayName=$DisplayName)" -Server $Server | Remove-ADObject -Confirm:$false #endregion } } <# .SYNOPSIS Maps a PowerShell drive to the Active Directory Certificate Services location. .DESCRIPTION Maps a PowerShell drive to the Active Directory Certificate Services location of the Configuration partition under CN=Public Key Services,CN=Services,... . The new drive is ADCS:. This is purely for convenience of checking the objects updated by functions in the ADCSTemplate module. .PARAMETER Server FQDN of Active Directory Domain Controller to target for the operation. When not specified it will search for the nearest Domain Controller. .EXAMPLE PS C:\> New-ADCSDrive PS C:\> Set-Location ADCS: .EXAMPLE ### Explore templates with drive New-ADCSDrive Get-PSDrive cd ADCS: dir # List templates cd '.\CN=Certificate Templates' dir dir | fl * dir *WebServer* # list CAs cd \ cd '.\CN=Enrollment Services' dir cd C: .NOTES Requires Enterprise Administrator permissions, since this touches the AD Configuration partition. #> Function New-ADCSDrive { param( [string]$Server = (Get-ADDomainController -Discover -ForceDiscover -Writable).HostName[0] ) $ConfigNC = $((Get-ADRootDSE -Server $Server).configurationNamingContext) New-PSDrive -Name ADCS -PSProvider ActiveDirectory -Root "CN=Public Key Services,CN=Services,$ConfigNC" -Server $Server -Scope Global } Export-ModuleMember -Function *-ADCS* |