94 lines
2.7 KiB
PowerShell
94 lines
2.7 KiB
PowerShell
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Param(
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[string] $display,
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[switch] $noEchoBack,
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[string] $mask = '*',
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[switch] $keyIn,
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[switch] $encoded
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)
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$ErrorActionPreference = 'Stop' # for cmdlet
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trap {
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# `throw $_` and `Write-Error $_` return exit-code 0
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$Host.UI.WriteErrorLine($_)
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exit 1
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}
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function decodeDOS($arg) {
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[Regex]::Replace($arg, '#(\d+);', { [char][int] $args[0].Groups[1].Value })
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}
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if ($encoded) {
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if ($display -ne '') { $display = decodeDOS $display }
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if ($mask -ne '') { $mask = decodeDOS $mask }
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}
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Write-Warning "[PS] display: <$display>" #_DBG
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Write-Warning "[PS] noEchoBack: $noEchoBack" #_DBG
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Write-Warning "[PS] mask: <$mask>" #_DBG
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Write-Warning "[PS] keyIn: $keyIn" #_DBG
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# Instant method that opens TTY without CreateFile via P/Invoke in .NET Framework
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# **NOTE** Don't include special characters in $command when $getRes is True.
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function execWithTTY ($command, $getRes = $False) {
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Write-Warning "[PS] command: <$command> getRes: $getRes" #_DBG
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if ($getRes) {
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$res = (cmd.exe /C "<CON powershell.exe -Command $command")
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if ($LastExitCode -ne 0) { exit 1 }
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} else {
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$command | cmd.exe /C ">CON powershell.exe -Command -"
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if ($LastExitCode -ne 0) { exit 1 }
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$res = ''
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}
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return $res
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}
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function writeTTY ($text) {
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execWithTTY ('Write-Host ''' + ($text -replace '''', '''''') + ''' -NoNewline')
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}
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[string] $inputTTY = ''
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if ($noEchoBack -and (-not $keyIn) -and ($mask -eq '*')) {
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$inputTTY = execWithTTY ('$inputTTY = Read-Host -AsSecureString;' +
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'$bstr = [System.Runtime.InteropServices.Marshal]::SecureStringToBSTR($inputTTY);' +
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'[System.Runtime.InteropServices.Marshal]::PtrToStringAuto($bstr)') $True
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return $inputTTY
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}
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$isEditable = (-not $noEchoBack) -and (-not $keyIn)
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if ($keyIn) { $reqSize = 1 }
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else { $reqSize = 1024 } # dummy
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while ($True) {
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if ($isEditable) {
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$chunk = execWithTTY 'Read-Host' $True
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$chunk += "`n"
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} else { # raw
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$chunk = execWithTTY '[System.Console]::ReadKey($True).KeyChar' $True
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}
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if ($chunk -eq '') { break }
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$chunk = $chunk -replace '[\x00-\x08\x0b\x0c\x0e-\x1f\x7f]', ''
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if ($chunk -eq '') { continue }
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if (-not $isEditable) {
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$displayInput = $chunk -replace '[\r\n]', ''
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if ($displayInput -ne '') {
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if ($noEchoBack) {
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if ($mask -eq '') { $displayInput = '' }
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else { $displayInput = $displayInput -replace '.', $mask }
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}
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if ($displayInput -ne '') { writeTTY $displayInput }
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}
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}
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$inputTTY += $chunk
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if (($inputTTY -match '[\r\n]$') -or ($keyIn -and ($inputTTY.Length -ge $reqSize)))
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{ break }
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}
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if (-not $isEditable) { writeTTY "`n" } # new-line
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return '''' + $inputTTY + '''' #DBG
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