#!/usr/bin/python

import sys


def gftp_descrable_password(password):
    """gftp password descrambler

    This code has been released in the Public Domain by the original author.

    """
    if not password.startswith('$'):
        return password
    newpassword = []
    pwdparts = map(ord, password)
    for i in range(1, len(pwdparts), 2):
        if ((pwdparts[i] & 0xc3) != 0x41 or
            (pwdparts[i+1] & 0xc3) != 0x41):
            return password
        newpassword.append(chr(((pwdparts[i] & 0x3c) << 2) +
                               ((pwdparts[i+1] & 0x3c) >> 2)))
    return "".join(newpassword)



def main(argv):
    crypt = argv[1]
    if len(crypt) != 0:
        print "decoding..."
        print gftp_descrable_password(argv[1])
    else:
        print """usage: python decode.py \\$YOURPASSWORDFROMFILE

        may you missed to add a leading \\ infront if the password?
        """


if __name__ == "__main__":
    main(sys.argv)