#!/usr/bin/python
# -#- coding: utf-8 -#-

##  unandpwlist
##  @Description: 
##  @Author: Richard S. Hutchison
##  @Email: rich.hutch@live.com
##  @Creation Date:   2015-11-23 22:13:52
##  
##  @Usage: 
##  
##  @Last Modified by:   Innovate
##  @Last Modified time: 2019-12-08 13:32:43

import hashlib, os
resource_file = "passwords.txt"
def encode(username,password):
  return "$%s::%s:"%(username,hashlib.sha1(password).hexdigest())
def add_user(username,password):
  if os.path.exists(resource_file):
    with open(resource_file) as f:
      if "$%s::"%username in f.read():
        raise Exception("user already exists")
  with open(resource_file, "w") as f:
    print >> f, encode(username,password)
  return username
def check_login(username,password):
  with open(resource_file) as f:
    if encode(username,password) in f.read():
      return username

def create_username():
  try:
    username = add_user(raw_input("enter username:"),raw_input("enter password:"))
    print "Added User! %s"%username
  except Exception as e:
    print "Failed to add user %s! ... user already exists??"%username

def login():
    if check_login(raw_input("enter username:"), raw_input("enter password:")):
      print "Login Success!!"
    else:
      print "there was a problem logging in"

while True:
  {'c':create_username, 'l':login}.get(raw_input("(c)reate user\n(l)ogin\n------------\n>").lower(),login)()