In my current project I am developing some Jython based command line tools and had the need for masking passwords entered in the command shell. Python provides the getpass module for this purpose. Unfortunately this module has not been made available for Jython.
Here comes a module I wrote to provide this kind of functionality. It uses the mechanism described here //java.sun.com/developer/technicalArticles/Security/pwordmask/ to mask characters entered at the command prompt. Additionally if Java 6 or higher is running Jython the module will instead use the new Console.readPassword() method. In case the module is running in an environment where the getpass module is available it will delegate to the corresponding methods of this module instead of using its own implementations.
# ext_getpass.py # @author Sebastian Thomschke, //sebthom.de/ import thread, sys, time, os # exposed methods: __all__ = ["getpass","getuser"] def __doMasking(stream): __doMasking.stop = 0 while not __doMasking.stop: stream.write("b*") stream.flush() time.sleep(0.01) def generic_getpass(prompt="Password: ", stream=None): if not stream: stream = sys.stderr prompt = str(prompt) if prompt: stream.write(prompt) stream.flush() thread.start_new_thread(__doMasking, (stream,)) password = raw_input() __doMasking.stop = 1 return password def generic_getuser(): for name in ('LOGNAME', 'USER', 'LNAME', 'USERNAME'): usr = os.environ.get(name) if usr: return usr def java6_getpass(prompt="Password: ", stream=None): if not stream: stream = sys.stderr prompt = str(prompt) if prompt: stream.write(prompt) stream.flush() from java.lang import System console = System.console() if console == None: return generic_getpass(prompt, stream) else: return "".join(console.readPassword()) try: # trying to use Python's getpass implementation import getpass getpass = getpass.getpass getuser = getpass.getuser except: getuser = generic_getuser # trying to use Java 6's Console.readPassword() implementation try: from java.io import Console getpass = java6_getpass except ImportError, e: # use the generic getpass implementation getpass = generic_getpass
Here is an usage example:
import ext_getpass as getpass pw = getpass.getpass("Please enter your password:") print "The entered password was: " + pw
1 thought on “getpass for Jython”
With Jython 2.5.1, I get an AttributeError on line 51. Since that block only handles the ImportError, the script was coughing-up a traceback. In my local copy, I’ve changed line 51 to read…
except (ImportError, AttributeError), e: