Can I mask an input text in a bat file?

Question

I am writing a batch file to execute some other programs. In this case I need to prompt for a password. Do I have any way to mask the input text? I don't need to print ******* characters instead of input characters. Linux's Password prompt behavior (Print nothing while typing) is enough.

@echo off SET /P variable=Password :  echo %variable% Pause 

This will read the input but I can't mask the text using this approach.

Answer 1

Yes - I am 4 years late.

But I found a way to do this in one line without having to create an external script; by calling powershell commands from a batch file.

Thanks to TessellatingHeckler - without outputting to a text file (I set the powershell command in a variable, because it's pretty messy in one long line inside a for loop).

@echo off set "psCommand=powershell -Command "$pword = read-host 'Enter Password' -AsSecureString ; ^     $BSTR=[System.Runtime.InteropServices.Marshal]::SecureStringToBSTR($pword); ^         [System.Runtime.InteropServices.Marshal]::PtrToStringAuto($BSTR)"" for /f "usebackq delims=" %%p in (`%psCommand%`) do set password=%%p echo %password% 

Originally I wrote it to output to a text file, then read from that text file. But the above method is better. In one extremely long, near incomprehensible line:

@echo off powershell -Command $pword = read-host "Enter password" -AsSecureString ; $BSTR=[System.Runtime.InteropServices.Marshal]::SecureStringToBSTR($pword) ; [System.Runtime.InteropServices.Marshal]::PtrToStringAuto($BSTR) > .tmp.txt & set /p password=<.tmp.txt & del .tmp.txt echo %password% 

I'll break this down - you can split it up over a few lines using caret ^, which is much nicer...

@echo off powershell -Command $pword = read-host "Enter password" -AsSecureString ; ^     $BSTR=[System.Runtime.InteropServices.Marshal]::SecureStringToBSTR($pword) ; ^         [System.Runtime.InteropServices.Marshal]::PtrToStringAuto($BSTR) > .tmp.txt  set /p password=<.tmp.txt & del .tmp.txt echo %password% 

This article explains what the powershell commands are doing; essentially it gets input using Read-Host -AsSecureString - the following two lines convert that secure string back into plain text, the output (plaintext password) is then sent to a text file using >.tmp.txt. That file is then read into a variable and deleted.