Batch File password

password_bat.bat

:: This batch file demonstrates how to use a powershell command to do password entry. The password entry part 
:: is done as a batch file function.
:: As ever, call it with 
:: CALL :Func param1, param2
@ECHO OFF

CALL :GET_PASSWORD "Enter password", PASSWORD
ECHO Password was: %PASSWORD%

EXIT /b 0

:: Usage: CALL :GET_PASSWORD prompt output
::   prompt: Text prompt to the user
::   output: Variable to set the password
:GET_PASSWORD
set "__psCommand=powershell -Command "$pword = read-host '%~1' -AsSecureString ; ^
    $BSTR=[System.Runtime.InteropServices.Marshal]::SecureStringToBSTR($pword); ^
        [System.Runtime.InteropServices.Marshal]::PtrToStringAuto($BSTR)""
for /f "usebackq delims=" %%p in (`%__psCommand%`) do set %~2=%%p

Source for the powershell stuff: https://stackoverflow.com/a/20343074/3274353