[IronPython] Problem with getpass.getpass() in IronPython

[Roman Miklos]

With IronPython, this 

import getpass
pwd = getpass.getpass()

do'nt work properly, because the password will be echoed.

I worked about this problem. The NET-platform probably doesn't have a 
direct function for getting password from console. 
I found only this C# example 
http://www.harper.no/valery/content/binary/ProtectData.cs.txt
and wrote a simple module net_getpass.py which contains a function 
getpass(). 
For those who have the same problem, here is the source:

------------------------------------------------------------ source 
-------------------------------------------------------------------------------
'''
Module net_getpass
Getting password from console in IronPython (Python.NET)

Author: Roman Miklos (RMiklos at pss.sk)
'''
import clr
import System
from System import Console


def getpass(prompt="Password:"):
  '''Read Password from Console without echo'''
  # Prompt
  Console.Write(prompt)
  # create Instance of ConsoleKeyInfo
  key = System.ConsoleKeyInfo()
  # initialize vars
  pwd =""
  EnterPressed = False
  # Read while input not ends
  while not EnterPressed:
    key = Console.ReadKey(True)
    if key.Key == System.ConsoleKey.Enter:
      # End of Input
      EnterPressed = True
 
    elif key.Key == System.ConsoleKey.Backspace:
      if len(pwd)>0:
        # Clear last character in password 
        pwd = pwd[:-1]
        Console.Write(key.KeyChar)
        Console.Write(" ")
        Console.Write(key.KeyChar)
      else:
        Console.Beep()
 
    else:
      pwd += key.KeyChar
      Console.Write("*")
 
  # Next line
  Console.WriteLine()
  # return password
  return (pwd)

################################################################################
# Module Test
################################################################################
if __name__ == "__main__":
  print "Your Password is: %s" % getpass("Enter your password please:") 

------------------------------------------------------------------ end of 
source 
-------------------------------------------------------------------------

However I don't make usage of .NET SecureString() object in my module as 
showed in above C# example,
but for simplicity I used only normal python string.
Mgr. Ing. Roman MIKLÓŠ 
Prvá stavebná sporiteľňa a.s. 
Bajkalská 30, P. O. Box 48 
829 48  Bratislava 25 
Tel.: +421/ 2 / 582 31 174 
Fax: +421/ 2 / 582 31 109 
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