HiddenString.ps1
|
class HiddenString { hidden [SecureString]$SecureString = [SecureString]::new() hidden New([Object]$Object, [Bool]$Warn) { if ($Object -is [SecureString]) { $This.SecureString = $Object } elseif ($Object -is [HiddenString]) { $This.SecureString = $Object.SecureString } elseif ($Object -is [Byte[]]) { $String = [System.Text.StringBuilder]::new() foreach ($Byte in $Object) { $x2 = '{0:x2}' -f $Byte [void]$String.Append($x2) } $This.SecureString = ConvertTo-SecureString $String } elseif ($Object) { $This.Add($Object, $Warn) } } HiddenString() { $This.New($Null, $True) } HiddenString([Object]$Object) { $This.New($Object, $True) } HiddenString([Object]$Object, $Warn) { $This.New($Object, $Warn) } static [HiddenString]FromBase64Cypher([string]$String) { return [System.Convert]::FromBase64String($String) } [Void]Clear() { $This.SecureString.Clear() } [Void]Add([Char[]]$Characters) { $This.Add($Characters, $True) } [Void]Add([Char[]]$Characters, [bool]$Warn) { if ($Warn -and $Characters.Count -gt 1) { Write-Warning 'For better obscurity, use a hidden or secure string for input.' } $Characters.ForEach{ $This.SecureString.AppendChar($_) } } [Bool]Equals($Object) { return $This.SecureString.Equals($Object.SecureString)} [SecureString]ToSecureString() { return $This.SecureString } [String]Reveal() { return $This.Reveal($True) } [String]Reveal($Warn) { if ($Warn) { Write-Warning 'For better obscurity, use a secure string output.' } $Ptr = [System.Runtime.InteropServices.Marshal]::SecureStringToCoTaskMemUnicode($This.SecureString) $String = [System.Runtime.InteropServices.Marshal]::PtrToStringUni($Ptr) [System.Runtime.InteropServices.Marshal]::ZeroFreeCoTaskMemUnicode($Ptr) return $String } [Void]Dispose() { $This.SecureString.Dispose() } } class HiddenString2SecureString : System.Management.Automation.PSTypeConverter { [bool] CanConvertFrom([object]$sourceValue, [Type]$destinationType) { return $false } [object] ConvertFrom([object]$sourceValue, [Type]$destinationType, [IFormatProvider]$formatProvider, [bool]$ignoreCase) { throw [NotImplementedException]::new() } [bool] CanConvertTo([object]$sourceValue, [Type]$destinationType) { return ($destinationType -eq [System.Security.SecureString])} [object] ConvertTo([object]$sourceValue, [Type]$destinationType, [IFormatProvider]$formatProvider, [bool]$ignoreCase) { return $sourceValue.SecureString } } Update-TypeData -Force -TypeName HiddenString -TypeConverter HiddenString2SecureString |