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# -*- coding: utf-8 -*-
# credentials.py
# Copyright (C) 2013 LEAP
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""
Credentials utilities
"""
from PySide import QtCore, QtGui
WEAK_PASSWORDS = ("123456", "qweasd", "qwerty", "password")
USERNAME_REGEX = r"^[A-Za-z][A-Za-z\d_\-\.]+[A-Za-z]$"
USERNAME_VALIDATOR = QtGui.QRegExpValidator(QtCore.QRegExp(USERNAME_REGEX))
def username_checks(username):
# translation helper
_tr = QtCore.QObject().tr
message = None
if message is None and len(username) < 2:
message = _tr("Username must have at least 2 characters")
valid = USERNAME_VALIDATOR.validate(username, 0)
valid_username = valid[0] == QtGui.QValidator.State.Acceptable
if message is None and not valid_username:
message = _tr("Invalid username")
return message is None, message
def password_checks(username, password, password2):
"""
Performs basic password checks to avoid really easy passwords.
:param username: username provided at the registrarion form
:type username: str
:param password: password from the registration form
:type password: str
:param password2: second password from the registration form
:type password: str
:returns: True and empty message if all the checks pass,
False and an error message otherwise
:rtype: tuple(bool, str)
"""
# translation helper
_tr = QtCore.QObject().tr
message = None
if message is None and password != password2:
message = _tr("Passwords don't match")
if message is None and not password:
message = _tr("You can't use an empty password")
if message is None and len(password) < 6:
message = _tr("Password too short")
if message is None and password in WEAK_PASSWORDS:
message = _tr("Password too easy")
if message is None and username == password:
message = _tr("Password equal to username")
return message is None, message
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