def load_passwords()

in otp.py [0:0]

• 23 lines of code
• 7 McCabe index (conditional complexity)

def load_passwords():
  "Load password from the storage file."
  path = otp_path()
  try:
    s = os.lstat(path)
  except OSError:
    return { }
  if not stat.S_ISREG(s.st_mode):
    print('ERROR: not a regular file:', path)
    sys.exit(1)
  # Only user read/write. Nobody else.
  if (s.st_mode & (stat.S_IRWXU | stat.S_IRWXG | stat.S_IRWXO)) != 0o600:
    print('ERROR: should be mode 0600:', path)
    sys.exit(1)

  pwds = { }
  for l in open(path).readlines():
    m = RE_STORAGE.match(l)
    if m:
      #print('MATCH:', m.groups())
      if m.group(2):
        algo = m.group(2).lower()
      else:
        algo = DEFAULT_ALGO
      pwds[m.group(4).encode()] = (m.group(5).encode(), algo)

  return pwds