Modules/CertificateDsc.Common/CertificateDsc.Common.psm1
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# Import the Networking Resource Helper Module Import-Module -Name (Join-Path -Path (Split-Path -Path $PSScriptRoot -Parent) ` -ChildPath (Join-Path -Path 'CertificateDsc.ResourceHelper' ` -ChildPath 'CertificateDsc.ResourceHelper.psm1')) # Import Localization Strings $localizedData = Get-LocalizedData ` -ResourceName 'CertificateDsc.Common' ` -ResourcePath $PSScriptRoot <# .SYNOPSIS Validates the existence of a file at a specific path. .PARAMETER Path The location of the file. Supports any path that Test-Path supports. .PARAMETER Quiet Returns $false if the file does not exist. By default this function throws an exception if the file is missing. .EXAMPLE Test-CertificatePath -Path '\\server\share\Certificates\mycert.cer' .EXAMPLE Test-CertificatePath -Path 'C:\certs\my_missing.cer' -Quiet .EXAMPLE 'D:\CertRepo\a_cert.cer' | Test-CertificatePath .EXAMPLE Get-ChildItem -Path D:\CertRepo\*.cer | Test-CertificatePath #> function Test-CertificatePath { [CmdletBinding()] param ( [Parameter(Mandatory = $true, ValueFromPipeline)] [String[]] $Path, [Parameter()] [Switch] $Quiet ) Process { foreach ($pathNode in $Path) { if ($pathNode | Test-Path -PathType Leaf) { $true } elseif ($Quiet) { $false } else { New-InvalidArgumentException ` -Message ($LocalizedData.FileNotFoundError -f $pathNode) ` -ArgumentName 'Path' } } } } # end function Test-CertificatePath <# .SYNOPSIS Validates whether a given certificate is valid based on the hash algoritms available on the system. .PARAMETER Thumbprint One or more thumbprints to Test. .PARAMETER Quiet Returns $false if the thumbprint is not valid. By default this function throws an exception if validation fails. .EXAMPLE Test-Thumbprint ` -Thumbprint fd94e3a5a7991cb6ed3cd5dd01045edf7e2284de .EXAMPLE Test-Thumbprint ` -Thumbprint fd94e3a5a7991cb6ed3cd5dd01045edf7e2284de,0000e3a5a7991cb6ed3cd5dd01045edf7e220000 ` -Quiet .EXAMPLE Get-ChildItem -Path Cert:\LocalMachine -Recurse | Where-Object -FilterScript { $_.Thumbprint } | Select-Object -Expression Thumbprint | Test-Thumbprint -Verbose #> function Test-Thumbprint { [CmdletBinding()] param ( [Parameter(Mandatory = $true, ValueFromPipeline)] [ValidateNotNullOrEmpty()] [System.String[]] $Thumbprint, [Parameter()] [Switch] $Quiet ) Begin { # Get FIPS registry key $fips = [System.Int32] (Get-ItemProperty -Path 'HKLM:\SYSTEM\CurrentControlSet\Control\Lsa\FipsAlgorithmPolicy' -ErrorAction SilentlyContinue).Enabled # Get a list of Hash Providers $allHashProviders = [System.AppDomain]::CurrentDomain.GetAssemblies().GetTypes() if ($fips -eq $true) { # Support only FIPS compliant Hash Algorithms $hashProviders = $allHashProviders | Where-Object -FilterScript { $_.BaseType.BaseType -eq [System.Security.Cryptography.HashAlgorithm] -and ($_.Name -cmatch 'Provider$' -and $_.Name -cnotmatch 'MD5') } } else { $hashProviders = $allHashProviders | Where-Object -FilterScript { $_.BaseType.BaseType -eq [System.Security.Cryptography.HashAlgorithm] -and ($_.Name -cmatch 'Managed$' -or $_.Name -cmatch 'Provider$') } } # Get a list of all Valid Hash types and lengths into an array $validHashes = @() foreach ($hashProvider in $hashProviders) { $bitSize = ( New-Object -TypeName $hashProvider ).HashSize $validHash = New-Object ` -TypeName PSObject ` -Property @{ Hash = $hashProvider.BaseType.Name BitSize = $bitSize HexLength = $bitSize / 4 } $validHashes += @( $validHash ) } } Process { foreach ($hash in $Thumbprint) { $isValid = $false foreach ($algorithm in $validHashes) { if ($hash -cmatch "^[a-fA-F0-9]{$($algorithm.HexLength)}$") { $isValid = $true } } if ($Quiet -or $isValid) { $isValid } else { New-InvalidOperationException ` -Message ($LocalizedData.InvalidHashError -f $hash) } } } } # end function Test-Thumbprint <# .SYNOPSIS Locates one or more certificates using the passed certificate selector parameters. If more than one certificate is found matching the selector criteria, they will be returned in order of descending expiration date. .PARAMETER Thumbprint The thumbprint of the certificate to find. .PARAMETER FriendlyName The friendly name of the certificate to find. .PARAMETER Subject The subject of the certificate to find. .PARAMETER DNSName The subject alternative name of the certificate to export must contain these values. .PARAMETER Issuer The issuer of the certificate to find. .PARAMETER KeyUsage The key usage of the certificate to find must contain these values. .PARAMETER EnhancedKeyUsage The enhanced key usage of the certificate to find must contain these values. .PARAMETER Store The Windows Certificate Store Name to search for the certificate in. Defaults to 'My'. .PARAMETER AllowExpired Allows expired certificates to be returned. #> function Find-Certificate { [CmdletBinding()] [OutputType([System.Security.Cryptography.X509Certificates.X509Certificate2[]])] param ( [Parameter()] [String] $Thumbprint, [Parameter()] [String] $FriendlyName, [Parameter()] [String] $Subject, [Parameter()] [String[]] $DNSName, [Parameter()] [String] $Issuer, [Parameter()] [String[]] $KeyUsage, [Parameter()] [String[]] $EnhancedKeyUsage, [Parameter()] [String] $Store = 'My', [Parameter()] [Boolean] $AllowExpired = $false ) $certPath = Join-Path -Path 'Cert:\LocalMachine' -ChildPath $Store if (-not (Test-Path -Path $certPath)) { # The Certificte Path is not valid New-InvalidArgumentException ` -Message ($LocalizedData.CertificatePathError -f $certPath) ` -ArgumnentName 'Store' } # if # Assemble the filter to use to select the certificate $certFilters = @() if ($PSBoundParameters.ContainsKey('Thumbprint')) { $certFilters += @('($_.Thumbprint -eq $Thumbprint)') } # if if ($PSBoundParameters.ContainsKey('FriendlyName')) { $certFilters += @('($_.FriendlyName -eq $FriendlyName)') } # if if ($PSBoundParameters.ContainsKey('Subject')) { $certFilters += @('($_.Subject -eq $Subject)') } # if if ($PSBoundParameters.ContainsKey('Issuer')) { $certFilters += @('($_.Issuer -eq $Issuer)') } # if if (-not $AllowExpired) { $certFilters += @('(((Get-Date) -le $_.NotAfter) -and ((Get-Date) -ge $_.NotBefore))') } # if if ($PSBoundParameters.ContainsKey('DNSName')) { $certFilters += @('(@(Compare-Object -ReferenceObject $_.DNSNameList.Unicode -DifferenceObject $DNSName | Where-Object -Property SideIndicator -eq "=>").Count -eq 0)') } # if if ($PSBoundParameters.ContainsKey('KeyUsage')) { $certFilters += @('(@(Compare-Object -ReferenceObject ($_.Extensions.KeyUsages -split ", ") -DifferenceObject $KeyUsage | Where-Object -Property SideIndicator -eq "=>").Count -eq 0)') } # if if ($PSBoundParameters.ContainsKey('EnhancedKeyUsage')) { $certFilters += @('(@(Compare-Object -ReferenceObject ($_.EnhancedKeyUsageList.FriendlyName) -DifferenceObject $EnhancedKeyUsage | Where-Object -Property SideIndicator -eq "=>").Count -eq 0)') } # if # Join all the filters together $certFilterScript = '(' + ($certFilters -join ' -and ') + ')' Write-Verbose ` -Message ($LocalizedData.SearchingForCertificateUsingFilters -f $store, $certFilterScript) ` -Verbose $certs = Get-ChildItem -Path $certPath | Where-Object -FilterScript ([ScriptBlock]::Create($certFilterScript)) # Sort the certificates if ($certs.count -gt 1) { $certs = $certs | Sort-Object -Descending -Property 'NotAfter' } # if return $certs } # end function Find-Certificate <# .SYNOPSIS Get CDP container. .DESCRIPTION Gets the configuration data partition from the active directory configuration naming context. .PARAMETER DomainName The domain name. #> function Get-CdpContainer { [cmdletBinding()] [OutputType([psobject])] param( [Parameter()] [String] $DomainName ) if (-not $DomainName) { $configContext = ([ADSI]'LDAP://RootDSE').configurationNamingContext if (-not $configContext) { # The computer is not domain joined New-InvalidOperationException ` -Message ($LocalizedData.DomainNotJoinedError) } } else { $ctx = New-Object -TypeName System.DirectoryServices.ActiveDirectory.DirectoryContext('Domain', $DomainName) $configContext = 'CN=Configuration,{0}' -f ([System.DirectoryServices.ActiveDirectory.Domain]::GetDomain($ctx).GetDirectoryEntry().distinguishedName[0]) } Write-Verbose ` -Message ($LocalizedData.ConfigurationNamingContext -f $configContext.toString()) ` -Verbose $cdpContainer = [ADSI]('LDAP://CN=CDP,CN=Public Key Services,CN=Services,{0}' -f $configContext.toString()) return $cdpContainer } # end function Get-CdpContainer <# .SYNOPSIS Automatically locate a certificate authority in Active Directory .DESCRIPTION Automatically locates a certificate autority in Active Directory environments by leveraging ADSI to look inside the container CDP and subsequently trying to certutil -ping every located CA until one is found. .PARAMETER DomainName The domain name of the domain that will be used to locate the CA. Can be left empty to use the current domain. #> function Find-CertificateAuthority { [cmdletBinding()] [OutputType([psobject])] param( [Parameter()] [String] $DomainName ) Write-Verbose ` -Message ($LocalizedData.StartLocateCAMessage) ` -Verbose $cdpContainer = Get-CdpContainer @PSBoundParameters -ErrorAction Stop $caFound = $false foreach ($item in $cdpContainer.Children) { if (-not $caFound) { $caServerFQDN = ($item.distinguishedName -split '=|,')[1] $caRootName = ($item.Children.distinguishedName -split '=|,')[1] $certificateAuthority = [PSObject] @{ CARootName = $caRootName CAServerFQDN = $caServerFQDN } if (Test-CertificateAuthority ` -CARootName $caRootName ` -CAServerFQDN $caServerFQDN) { $caFound = $true break } } } if ($caFound) { Write-Verbose ` -Message ($LocalizedData.CaFoundMessage -f $certificateAuthority.CAServerFQDN, $certificateAuthority.CARootName) ` -Verbose return $certificateAuthority } else { New-InvalidOperationException ` -Message ($LocalizedData.NoCaFoundError) } } # end function Find-CertificateAuthority <# .SYNOPSIS Wraps a single ADSI command to get the domain naming context so it can be mocked. #> function Get-DirectoryEntry { [CmdletBinding()] param () return ([adsi] 'LDAP://RootDSE').Get('rootDomainNamingContext') } <# .SYNOPSIS Test to see if the specified ADCS CA is available. .PARAMETER CAServerFQDN The FQDN of the ADCS CA to test for availability. .PARAMETER CARootName The name of the ADCS CA to test for availability. #> function Test-CertificateAuthority { [cmdletBinding()] [OutputType([Boolean])] param( [Parameter()] [System.String] $CAServerFQDN, [Parameter()] [System.String] $CARootName ) Write-Verbose ` -Message ($LocalizedData.StartPingCAMessage) ` -Verbose $locatorInfo = New-Object -TypeName System.Diagnostics.ProcessStartInfo $locatorInfo.FileName = 'certutil.exe' $locatorInfo.Arguments = ('-ping "{0}\{1}"' -f $CAServerFQDN, $CARootName) # Certutil does not make use of standard error stream $locatorInfo.RedirectStandardError = $false $locatorInfo.RedirectStandardOutput = $true $locatorInfo.UseShellExecute = $false $locatorInfo.CreateNoWindow = $true $locatorProcess = New-Object -TypeName System.Diagnostics.Process $locatorProcess.StartInfo = $locatorInfo $null = $locatorProcess.Start() $locatorOut = $locatorProcess.StandardOutput.ReadToEnd() $null = $locatorProcess.WaitForExit() Write-Verbose ` -Message ($LocalizedData.CaPingMessage -f $locatorProcess.ExitCode, $locatorOut) ` -Verbose if ($locatorProcess.ExitCode -eq 0) { Write-Verbose ` -Message ($LocalizedData.CaOnlineMessage -f $CAServerFQDN, $CARootName) ` -Verbose return $true } else { Write-Verbose ` -Message ($LocalizedData.CaOfflineMessage -f $CAServerFQDN, $CARootName) ` -Verbose return $false } } # end function Test-CertificateAuthority <# .SYNOPSIS Get certificate template names from Active Directory for x509 certificates. .DESCRIPTION Gets the certificate templates from Active Directory by using a DirectorySearcher object to find all objects with an objectClass of pKICertificateTemplate from the search root of CN=Certificate Templates,CN=Public Key Services,CN=Services,CN=Configuration .NOTES The domain variable is populated based on the domain of the user running the function. When run as System this will return the domain of computer. Normally this won't make any difference unless the user is from a foreign domain. #> function Get-CertificateTemplatesFromActiveDirectory { [CmdletBinding()] [OutputType([PSCustomObject[]])] param () try { $domain = Get-DirectoryEntry $searcher = New-Object -TypeName DirectoryServices.DirectorySearcher $searcher.Filter = '(objectclass=pKICertificateTemplate)' $searcher.SearchRoot = 'LDAP://CN=Certificate Templates,CN=Public Key Services,CN=Services,CN=Configuration,{0}' -f $domain $searchResults = $searcher.FindAll() } catch { Write-Verbose -Message $_.Exception.Message Write-Warning -Message $LocalizedData.ActiveDirectoryTemplateSearch } $adTemplates = @() foreach ($searchResult in $searchResults) { $templateData = @{} $properties = New-Object -TypeName Object[] -ArgumentList $searchResult.Properties.Count $searchResult.Properties.CopyTo($properties, 0) $properties.ForEach({ $templateData[$_.Name] = ($_.Value | Out-String).Trim() }) $adTemplates += [PSCustomObject] $templateData } return $adTemplates } <# .SYNOPSIS Gets information about the certificate template. .DESCRIPTION This function returns the information about the certificate template by retreiving the available templates from Active Directory and matching the formatted certificate template name against this list. In addition to the template name the display name, template OID, the major version and minor version is also returned. .PARAMETER FormattedTemplate The text from the certificate template extension, retrieved from Get-CertificateTemplateText. #> function Get-CertificateTemplateInformation { [OutputType([PSCustomObject])] param ( [Parameter(Mandatory = $true)] [String] $FormattedTemplate ) $templateInformation = @{} switch -Regex ($FormattedTemplate) { <# Example of the certificate extension template text Template=Display Name 1(1.3.6.1.4.1.311.21.8.5734392.6195358.14893705.12992936.3444946.62.3384218.1234567) Major Version Number=100 Minor Version Number=5 If the Display Name of the template has not been found then FormattedText would like something like this. Template=1.3.6.1.4.1.311.21.8.5734392.6195358.14893705.12992936.3444946.62.3384218.1234567 Major Version Number=100 Minor Version Number=5 The Name of the template is found by matching the OID or the Display Name against the list of temples in AD. #> 'Template=(?:(?<DisplayName>.+)\((?<Oid>[\d.]+)\))|(?<Oid>[\d.]+)\s*Major\sVersion\sNumber=(?<MajorVersion>\d+)\s*Minor\sVersion\sNumber=(?<MinorVersion>\d+)' { [Array] $adTemplates = Get-CertificateTemplatesFromActiveDirectory if ([String]::IsNullOrEmpty($Matches.DisplayName)) { $template = $adTemplates.Where({ $_.'msPKI-Cert-Template-OID' -eq $Matches.Oid }) $Matches['DisplayName'] = $template.DisplayName } else { $template = $adTemplates.Where({ $_.'DisplayName' -eq $Matches.DisplayName }) } $Matches['Name'] = $template.Name if ($template.Count -eq 0) { Write-Warning -Message ($LocalizedData.TemplateNameResolutionError -f ('{0}({1})' -f $Matches.DisplayName, $Matches.Oid)) } $templateInformation['Name'] = $Matches.Name $templateInformation['DisplayName'] = $Matches.DisplayName $templateInformation['Oid'] = $Matches.Oid $templateInformation['MajorVersion'] = $Matches.MajorVersion $templateInformation['MinorVersion'] = $Matches.MinorVersion } # The certificate extension template text just contains the name of the template so return that. '^(?<TemplateName>\w+)\s?$' { $templateInformation['Name'] = $Matches.TemplateName } default { Write-Warning -Message ($LocalizedData.TemplateNameNotFound -f $FormattedTemplate) } } return [PSCustomObject] $templateInformation } <# .SYNOPSIS Gets the formatted text output from an X509 certificate template extension. .DESCRIPTION The supplied X509 Extension Collected is processed to find any Certificate Template extensions. If a template extension is found the Format method is called with the parameter $true and the text output is returned. .PARAMETER TemplateExtensions The X509 extensions collection from and X509 certificate to be searched for a certificate template extension. #> function Get-CertificateTemplateExtensionText { [OutputType([String])] param ( [Parameter(Mandatory = $true)] [System.Security.Cryptography.X509Certificates.X509ExtensionCollection] $TemplateExtensions ) $templateOidNames = 'Certificate Template Information', 'Certificate Template Name' $templateExtension = $TemplateExtensions.Where({ $_.Oid.FriendlyName -in $templateOidNames })[0] if ($null -ne $templateExtension) { return $templateExtension.Format($true) } } <# .SYNOPSIS Get a certificate template name from an x509 certificate. .DESCRIPTION Gets the name of the template used for the certificate that is passed to this cmdlet by translating the OIDs "1.3.6.1.4.1.311.21.7" or "1.3.6.1.4.1.311.20.2". .PARAMETER Certificate The certificate object the template name is needed for. #> function Get-CertificateTemplateName { [cmdletBinding()] [OutputType([System.String])] param ( [Parameter(Mandatory = $true)] [object] $Certificate ) if ($Certificate -isnot [System.Security.Cryptography.X509Certificates.X509Certificate2]) { return } $templateExtensionText = Get-CertificateTemplateExtensionText -TemplateExtensions $Certificate.Extensions if ($null -ne $templateExtensionText) { return Get-CertificateTemplateInformation -FormattedTemplate $templateExtensionText | Select-Object -ExpandProperty Name } } <# .SYNOPSIS Get certificate SAN .DESCRIPTION Gets the first subject alternative name for the certificate that is passed to this cmdlet .PARAMETER Certificate The certificate object the subject alternative name is needed for #> function Get-CertificateSan { [cmdletBinding()] [OutputType([System.String])] param ( # The certificate for which the subject alternative names are needed [Parameter(Mandatory = $true)] [object] $Certificate ) if ($Certificate -isnot [System.Security.Cryptography.X509Certificates.X509Certificate2]) { return } $subjectAlternativeName = $null $sanExtension = $Certificate.Extensions | Where-Object { $_.Oid.FriendlyName -match 'subject alternative name' } if ($null -eq $sanExtension) { return $subjectAlternativeName } $sanObjects = New-Object -ComObject X509Enrollment.CX509ExtensionAlternativeNames $altNamesStr = [System.Convert]::ToBase64String($sanExtension.RawData) $sanObjects.InitializeDecode(1, $altNamesStr) if ($sanObjects.AlternativeNames.Count -gt 0) { $subjectAlternativeName = $sanObjects.AlternativeNames[0].strValue } return $subjectAlternativeName } <# .SYNOPSIS Tests whether or not the command with the specified name exists. .PARAMETER Name The name of the command to test for. #> function Test-CommandExists { [OutputType([System.Boolean])] [CmdletBinding()] param ( [Parameter(Mandatory = $true)] [ValidateNotNullOrEmpty()] [System.String] $Name ) $command = Get-Command -Name $Name -ErrorAction 'SilentlyContinue' return ($null -ne $command) } <# .SYNOPSIS This function imports a 509 public key certificate to the specific Store. .PARAMETER FilePath The path to the certificate file to import. .PARAMETER CertStoreLocation The Certificate Store and Location Path to import the certificate to. #> function Import-CertificateEx { [CmdletBinding()] param ( [Parameter(Mandatory = $true)] [System.String] $FilePath, [Parameter(Mandatory = $true)] [System.String] $CertStoreLocation ) $location = Split-Path -Path (Split-Path -Path $CertStoreLocation -Parent) -Leaf $store = Split-Path -Path $CertStoreLocation -Leaf $cert = New-Object -TypeName System.Security.Cryptography.X509Certificates.X509Certificate2 $cert.Import($FilePath) $certStore = New-Object ` -TypeName System.Security.Cryptography.X509Certificates.X509Store ` -ArgumentList ($store, $location) $certStore.Open('MaxAllowed') $certStore.Add($cert) $certStore.Close() } <# .SYNOPSIS This function imports a Pfx public - private certificate to the specific Certificate Store Location. .PARAMETER FilePath The path to the certificate file to import. .PARAMETER CertStoreLocation The Certificate Store and Location Path to import the certificate to. .PARAMETER Exportable The parameter controls if certificate will be able to export the private key. .PARAMETER Password The password that the certificate located at the FilePath needs to be imported. #> function Import-PfxCertificateEx { [CmdletBinding()] param ( [Parameter(Mandatory = $true)] [System.String] $FilePath, [Parameter(Mandatory = $true)] [System.String] $CertStoreLocation, [Parameter(Mandatory = $false)] [Switch] $Exportable, [Parameter(Mandatory = $false)] [System.Security.SecureString] $Password ) $location = Split-Path -Path (Split-Path -Path $CertStoreLocation -Parent) -Leaf $store = Split-Path -Path $CertStoreLocation -Leaf $cert = New-Object -TypeName System.Security.Cryptography.X509Certificates.X509Certificate2 $flags = [System.Security.Cryptography.X509Certificates.X509KeyStorageFlags]::PersistKeySet if ($Exportable) { $flags = $flags -bor [System.Security.Cryptography.X509Certificates.X509KeyStorageFlags]::Exportable } if ($Password) { $cert.Import($FilePath, $Password, $flags) } else { $cert.Import($FilePath, $flags) } $certStore = New-Object ` -TypeName System.Security.Cryptography.X509Certificates.X509Store ` -ArgumentList @($store, $location) $certStore.Open('MaxAllowed') $certStore.Add($cert) $certStore.Close() } <# .SYNOPSIS This function generates the path to a Windows Certificate Store. .PARAMETER Location The Windows Certificate Store Location. .PARAMETER Store The Windows Certificate Store Name. #> function Get-CertificateStorePath { [CmdletBinding()] [OutputType([System.String])] param ( [Parameter(Mandatory = $true)] [ValidateSet('CurrentUser', 'LocalMachine')] [System.String] $Location, [Parameter(Mandatory = $true)] [ValidateNotNullOrEmpty()] [System.String] $Store ) return 'Cert:' | Join-Path -ChildPath $Location | Join-Path -ChildPath $Store } |