Added support for password validation using Django or custom validators e. g. for minimum password length.

CHANGELOG

@@ -29,6 +29,8 @@ Users:
   motion submitters and supporters, assignment candidates, mediafile
   uploader and chat message users if they have the respective
   permissions [#3191].
+- Added support for password validation using Django or custom validators
+  e. g. for minimum password length [#3200].
 
 
 Version 2.1.1 (2017-04-05)

openslides/users/views.py

@@ -2,6 +2,8 @@ from django.contrib.auth import login as auth_login
 from django.contrib.auth import logout as auth_logout
 from django.contrib.auth import update_session_auth_hash
 from django.contrib.auth.forms import AuthenticationForm
+from django.contrib.auth.password_validation import validate_password
+from django.core.exceptions import ValidationError as DjangoValidationError
 from django.utils.encoding import force_text
 from django.utils.translation import ugettext as _
 
@@ -102,6 +104,10 @@ class UserViewSet(ModelViewSet):
         """
         user = self.get_object()
         if isinstance(request.data.get('password'), str):
+            try:
+                validate_password(request.data.get('password'), user=request.user)
+            except DjangoValidationError as errors:
+                raise ValidationError({'detail': ' '.join(errors)})
             user.set_password(request.data.get('password'))
             user.save()
             return Response({'detail': _('Password successfully reset.')})
@@ -319,6 +325,10 @@ class SetPasswordView(APIView):
     def post(self, request, *args, **kwargs):
         user = request.user
         if user.check_password(request.data['old_password']):
+            try:
+                validate_password(request.data.get('new_password'), user=user)
+            except DjangoValidationError as errors:
+                raise ValidationError({'detail': ' '.join(errors)})
             user.set_password(request.data['new_password'])
             user.save()
             update_session_auth_hash(request, user)

openslides/utils/settings.py.tpl

@@ -68,9 +68,7 @@ DATABASES = {
 # Set use_redis to True to activate redis as cache-, asgi- and session backend.
 use_redis = False
 
-
 if use_redis:
-
     # Django Channels
 
     # Unless you have only a small assembly uncomment the following lines to
@@ -111,7 +109,6 @@ if use_redis:
     SESSION_ENGINE = 'redis_sessions.session'
 
 
-
 # Internationalization
 # https://docs.djangoproject.com/en/1.10/topics/i18n/
 
@@ -132,6 +129,11 @@ STATIC_ROOT = os.path.join(OPENSLIDES_USER_DATA_PATH, 'collected-static')
 MEDIA_ROOT = os.path.join(OPENSLIDES_USER_DATA_PATH, 'media', '')
 
 
+# Password validation
+# https://docs.djangoproject.com/en/1.10/topics/auth/passwords/#module-django.contrib.auth.password_validation
+# AUTH_PASSWORD_VALIDATORS = []
+
+
 # Customization of OpenSlides apps
 
 MOTION_IDENTIFIER_MIN_DIGITS = 1