Private/Get-MaskedString.ps1
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using namespace System.Runtime.InteropServices function Get-MaskedString { [CmdletBinding()] [OutputType([string])] param ( [Parameter(Mandatory, Position = 0, ValueFromPipeline)] [AllowEmptyString()] [string]$Source, [Parameter(Mandatory, Position = 1)] [AllowNull()] [securestring[]][SecureStringTransformation()]$Target, [Parameter()] [uint32]$First = 0, [Parameter()] [uint32]$Last = 0, [Parameter()] [uint32]$MaxNumberOfAsterisks = [int]::MaxValue, [Parameter()] [uint32]$MinNumberOfAsterisks = 0 ) begin { # decrypt securestring [string[]]$PlainTarget = @() foreach ($t in $Target) { if ($null -ne $t) { $PlainTarget += DecryptSecureString $t } } } process { if ([string]::IsNullOrEmpty($Source)) { [string]::Empty return } foreach ($pt in $PlainTarget) { if ([string]::IsNullOrEmpty($pt)) { continue } if ($First + $Last -gt $pt.Length) { continue } [int]$numberOfAsterisks = $pt.Length - $First - $Last if ($numberOfAsterisks -lt $MinNumberOfAsterisks) { $numberOfAsterisks = $MinNumberOfAsterisks } if ($numberOfAsterisks -gt $MaxNumberOfAsterisks) { $numberOfAsterisks = $MaxNumberOfAsterisks } [string]$Masked = [string]::Concat( $pt.Substring(0, $First), ''.PadLeft($numberOfAsterisks, '*'), $pt.Substring($pt.Length - $Last, $Last) ) $Source = [regex]::Replace($Source, $pt, $Masked, [System.Text.RegularExpressions.RegexOptions]::IgnoreCase) } $Source } end {} } |