Merge pull request #34 from nitmir/dev

Update version to 0.9.0

v0.9.0 - 2017-11-17
===================

Added
-----
* Dutch translation
* Protuguese translation (brazilian variant)
* Support for ldap3 version 2 or more (changes in the API)
  All exception are now in ldap3.core.exceptions, methodes for fetching attritutes and
  dn are renamed.
* Possibility to disable service message boxes on the login pages

Fixed
-----
* Then using the LDAP auth backend with ``bind`` method for password check, do not try to bind
  if the user dn was not found. This was causing the exception
  ``'NoneType' object has no attribute 'getitem'`` describe in #21
* Increase the max size of usernames (30 chars to 250)
* Fix XSS js injection

CHANGELOG.rst

@@ -6,6 +6,29 @@ All notable changes to this project will be documented in this file.
 .. contents:: Table of Contents
    :depth: 2
 
+
+v0.9.0 - 2017-11-17
+===================
+
+Added
+-----
+* Dutch translation
+* Protuguese translation (brazilian variant)
+* Support for ldap3 version 2 or more (changes in the API)
+  All exception are now in ldap3.core.exceptions, methodes for fetching attritutes and
+  dn are renamed.
+* Possibility to disable service message boxes on the login pages
+
+Fixed
+-----
+* Then using the LDAP auth backend with ``bind`` method for password check, do not try to bind
+  if the user dn was not found. This was causing the exception
+  ``'NoneType' object has no attribute 'getitem'`` describe in #21
+* Increase the max size of usernames (30 chars to 250)
+* Fix XSS js injection
+
+
+
 v0.8.0 - 2017-03-08
 ===================
 

README.rst

@@ -218,7 +218,8 @@ Template settings
         }
 
   if you omit some keys of the dictionnary, the default value for these keys is used.
-
+* ``CAS_SHOW_SERVICE_MESSAGES``: Messages displayed about the state of the service on the login page.
+  The default is ``True``.
 * ``CAS_INFO_MESSAGES``: Messages displayed in info-boxes on the html pages of the default templates.
   It is a dictionnary mapping message name to a message dict. A message dict has 3 keys:
 

cas_server/__init__.py

@@ -11,7 +11,7 @@
 """A django CAS server application"""
 
 #: version of the application
-VERSION = '0.8.0'
+VERSION = '0.9.0'
 
 #: path the the application configuration class
 default_app_config = 'cas_server.apps.CasAppConfig'

cas_server/auth.py

@@ -27,6 +27,7 @@ except ImportError:
 
 try:  # pragma: no cover
     import ldap3
+    import ldap3.core.exceptions
 except ImportError:
     ldap3 = None
 
@@ -297,6 +298,16 @@ class LdapAuthUser(DBAuthUser):  # pragma: no cover
                     settings.CAS_LDAP_USER_QUERY % ldap3.utils.conv.escape_bytes(username),
                     attributes=ldap3.ALL_ATTRIBUTES
                 ) and len(conn.entries) == 1:
+                    # try the new ldap3>=2 API
+                    try:
+                        user = conn.entries[0].entry_attributes_as_dict
+                        # store the user dn
+                        user["dn"] = conn.entries[0].entry_dn
+                    # fallback to ldap3<2 API
+                    except (
+                        ldap3.core.exceptions.LDAPKeyError,  # ldap3<1 exception
+                        ldap3.core.exceptions.LDAPAttributeError  # ldap3<2 exception
+                    ):
                         user = conn.entries[0].entry_get_attributes_dict()
                         # store the user dn
                         user["dn"] = conn.entries[0].entry_get_dn()
@@ -308,7 +319,7 @@ class LdapAuthUser(DBAuthUser):  # pragma: no cover
                 else:
                     super(LdapAuthUser, self).__init__(username)
                 break
-            except ldap3.LDAPCommunicationError:
+            except ldap3.core.exceptions.LDAPCommunicationError:
                 if retry_nb == 2:
                     raise
 
@@ -321,7 +332,7 @@ class LdapAuthUser(DBAuthUser):  # pragma: no cover
                 correct, ``False`` otherwise.
             :rtype: bool
         """
-        if settings.CAS_LDAP_PASSWORD_CHECK == "bind":
+        if self.user and settings.CAS_LDAP_PASSWORD_CHECK == "bind":
             try:
                 conn = ldap3.Connection(
                     settings.CAS_LDAP_SERVER,
@@ -336,6 +347,16 @@ class LdapAuthUser(DBAuthUser):  # pragma: no cover
                         settings.CAS_LDAP_USER_QUERY % ldap3.utils.conv.escape_bytes(self.username),
                         attributes=ldap3.ALL_ATTRIBUTES
                     ) and len(conn.entries) == 1:
+                        # try the ldap3>=2 API
+                        try:
+                            attributes = conn.entries[0].entry_attributes_as_dict
+                            # store the user dn
+                            attributes["dn"] = conn.entries[0].entry_dn
+                        # fallback to ldap<2 API
+                        except (
+                            ldap3.core.exceptions.LDAPKeyError,  # ldap3<1 exception
+                            ldap3.core.exceptions.LDAPAttributeError  # ldap3<2 exception
+                        ):
                             attributes = conn.entries[0].entry_get_attributes_dict()
                             attributes["dn"] = conn.entries[0].entry_get_dn()
                         # cache the attributes locally as we wont have access to the user password
@@ -346,7 +367,10 @@ class LdapAuthUser(DBAuthUser):  # pragma: no cover
                 finally:
                     conn.unbind()
                 return True
-            except (ldap3.LDAPBindError, ldap3.LDAPCommunicationError):
+            except (
+                ldap3.core.exceptions.LDAPBindError,
+                ldap3.core.exceptions.LDAPCommunicationError
+            ):
                 return False
         elif self.user and self.user.get(settings.CAS_LDAP_PASSWORD_ATTR):
             return check_password(

cas_server/default_settings.py

@@ -185,6 +185,8 @@ CAS_NEW_VERSION_EMAIL_WARNING = True
 #: You should not change it.
 CAS_NEW_VERSION_JSON_URL = "https://pypi.python.org/pypi/django-cas-server/json"
 
+#: If the service message should be displayed on the login page
+CAS_SHOW_SERVICE_MESSAGES = True
 
 #: Messages displayed in a info-box on the html pages of the default templates.
 #: ``CAS_INFO_MESSAGES`` is a :class:`dict` mapping message name to a message :class:`dict`.

cas_server/locale/pt_BR/django.po

@@ -0,0 +1,398 @@
+# SOME DESCRIPTIVE TITLE. 
+# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
+# This file is distributed under the same license as the PACKAGE package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: \n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2017-08-22 08:18-0300\n"
+"PO-Revision-Date: 2017-08-29 18:09+0200\n"
+"Language-Team: Roberto Morati <robertomorati@gmail.com>\n"
+"Language: pt_BR\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=2; plural=(n > 1);\n"
+"Last-Translator: Valentin Samir <valentin.samir@crans.org>\n"
+"X-Generator: Poedit 1.8.11\n"
+
+#: cas_server/apps.py:25 cas_server/templates/cas_server/base.html:7
+#: cas_server/templates/cas_server/base.html:26
+msgid "Central Authentication Service"
+msgstr "Central de Autenticação de Serviços"
+
+#: cas_server/default_settings.py:201
+msgid ""
+"The Central Authentication Service grants you access to most of our websites by "
+"authenticating only once, so you don't need to type your credentials again unless your "
+"session expires or you logout."
+msgstr ""
+"A Central de Autenticação de Serviços garante seu acesso à maioria dos nossos sitespor "
+"meio de uma única autenticação, então você não precisa digitar suas "
+"credenciaisnovamente, ao menos que sua sessão expire ou seu logout."
+
+#: cas_server/forms.py:85
+msgid "Identity provider"
+msgstr "Provedor de identidade"
+
+#: cas_server/forms.py:89 cas_server/forms.py:111
+msgid "Warn me before logging me into other sites."
+msgstr "Avise-me antes de me registrar em outros sites"
+
+#: cas_server/forms.py:93
+msgid "Remember the identity provider"
+msgstr "Relembrar o provedor de identidade"
+
+#: cas_server/forms.py:104 cas_server/models.py:638
+msgid "username"
+msgstr "usuário"
+
+#: cas_server/forms.py:108
+msgid "password"
+msgstr "senha"
+
+#: cas_server/forms.py:131
+msgid "The credentials you provided cannot be determined to be authentic."
+msgstr "As credenciais que você forneceu não podem ser determinadas como autênticas."
+
+#: cas_server/forms.py:183
+msgid "User not found in the temporary database, please try to reconnect"
+msgstr "Usuário não encontrado na base de dados temporária, por favor, tente se reconectar"
+
+#: cas_server/forms.py:197
+msgid "service"
+msgstr ""
+
+#: cas_server/management/commands/cas_clean_federate.py:20
+msgid "Clean old federated users"
+msgstr ""
+
+#: cas_server/management/commands/cas_clean_sessions.py:22
+msgid "Clean deleted sessions"
+msgstr ""
+
+#: cas_server/management/commands/cas_clean_tickets.py:22
+msgid "Clean old tickets"
+msgstr ""
+
+#: cas_server/models.py:71
+msgid "identity provider"
+msgstr "provedor de identidade"
+
+#: cas_server/models.py:72
+msgid "identity providers"
+msgstr "provedores de identidade"
+
+#: cas_server/models.py:78
+msgid "suffix"
+msgstr ""
+
+#: cas_server/models.py:80
+msgid "Suffix append to backend CAS returned username: ``returned_username`` @ ``suffix``."
+msgstr ""
+
+#: cas_server/models.py:87
+msgid "server url"
+msgstr ""
+
+#: cas_server/models.py:97
+msgid "CAS protocol version"
+msgstr ""
+
+#: cas_server/models.py:99
+msgid "Version of the CAS protocol to use when sending requests the the backend CAS."
+msgstr ""
+
+#: cas_server/models.py:106
+msgid "verbose name"
+msgstr ""
+
+#: cas_server/models.py:107
+msgid "Name for this identity provider displayed on the login page."
+msgstr "Nome para exibir o provedor de identidade na página de login."
+
+#: cas_server/models.py:113 cas_server/models.py:490
+msgid "position"
+msgstr ""
+
+#: cas_server/models.py:127
+msgid "display"
+msgstr ""
+
+#: cas_server/models.py:128
+msgid "Display the provider on the login page."
+msgstr ""
+
+#: cas_server/models.py:166
+msgid "Federated user"
+msgstr ""
+
+#: cas_server/models.py:167
+msgid "Federated users"
+msgstr ""
+
+#: cas_server/models.py:246
+msgid "User attributes cache"
+msgstr ""
+
+#: cas_server/models.py:247
+msgid "User attributes caches"
+msgstr ""
+
+#: cas_server/models.py:271
+msgid "User"
+msgstr ""
+
+#: cas_server/models.py:272
+msgid "Users"
+msgstr ""
+
+#: cas_server/models.py:364
+#, python-format
+msgid "Error during service logout %s"
+msgstr ""
+
+#: cas_server/models.py:484
+msgid "Service pattern"
+msgstr ""
+
+#: cas_server/models.py:485
+msgid "Services patterns"
+msgstr ""
+
+#: cas_server/models.py:491
+msgid "service patterns are sorted using the position attribute"
+msgstr ""
+
+#: cas_server/models.py:499 cas_server/models.py:664
+msgid "name"
+msgstr ""
+
+#: cas_server/models.py:500
+msgid "A name for the service"
+msgstr ""
+
+#: cas_server/models.py:508 cas_server/models.py:707 cas_server/models.py:737
+msgid "pattern"
+msgstr ""
+
+#: cas_server/models.py:510
+msgid ""
+"A regular expression matching services. Will usually looks like '^https://some\\.server"
+"\\.com/path/.*$'.As it is a regular expression, special character must be escaped with a "
+"'\\'."
+msgstr ""
+
+#: cas_server/models.py:521
+msgid "user field"
+msgstr ""
+
+#: cas_server/models.py:522
+msgid "Name of the attribute to transmit as username, empty = login"
+msgstr ""
+
+#: cas_server/models.py:527
+msgid "restrict username"
+msgstr ""
+
+#: cas_server/models.py:528
+msgid "Limit username allowed to connect to the list provided bellow"
+msgstr ""
+
+#: cas_server/models.py:533
+msgid "proxy"
+msgstr ""
+
+#: cas_server/models.py:534
+msgid "Proxy tickets can be delivered to the service"
+msgstr ""
+
+#: cas_server/models.py:540
+msgid "proxy callback"
+msgstr ""
+
+#: cas_server/models.py:541
+msgid "can be used as a proxy callback to deliver PGT"
+msgstr ""
+
+#: cas_server/models.py:548
+msgid "single log out"
+msgstr ""
+
+#: cas_server/models.py:549
+msgid "Enable SLO for the service"
+msgstr ""
+
+#: cas_server/models.py:558
+msgid ""
+"URL where the SLO request will be POST. empty = service url\n"
+"This is usefull for non HTTP proxied services."
+msgstr ""
+
+#: cas_server/models.py:639
+msgid "username allowed to connect to the service"
+msgstr ""
+
+#: cas_server/models.py:665
+msgid "name of an attribute to send to the service, use * for all attributes"
+msgstr ""
+
+#: cas_server/models.py:672 cas_server/models.py:745
+msgid "replace"
+msgstr ""
+
+#: cas_server/models.py:673
+msgid ""
+"name under which the attribute will be show to the service. empty = default name of the "
+"attribut"
+msgstr ""
+
+#: cas_server/models.py:700 cas_server/models.py:731
+msgid "attribute"
+msgstr ""
+
+#: cas_server/models.py:701
+msgid "Name of the attribute which must verify pattern"
+msgstr ""
+
+#: cas_server/models.py:708
+msgid "a regular expression"
+msgstr ""
+
+#: cas_server/models.py:732
+msgid "Name of the attribute for which the value must be replace"
+msgstr ""
+
+#: cas_server/models.py:738
+msgid "An regular expression maching whats need to be replaced"
+msgstr ""
+
+#: cas_server/models.py:746
+msgid "replace expression, groups are capture by \\1, \\2 …"
+msgstr ""
+
+#: cas_server/templates/cas_server/base.html:43
+#, python-format
+msgid ""
+"A new version of the application is available. This instance runs %(VERSION)s and the "
+"last version is %(LAST_VERSION)s. Please consider upgrading."
+msgstr ""
+"Uma nova versão da aplicação está disponível. Está instância usa a versão %(VERSION)s e "
+"a última versão é %(LAST_VERSION)s. Por favor, considere a atualização."
+
+#: cas_server/templates/cas_server/logged.html:4
+msgid ""
+"<h3>Log In Successful</h3>You have successfully logged into the Central Authentication "
+"Service.<br/>For security reasons, please Log Out and Exit your web browser when you are "
+"done accessing services that require authentication!"
+msgstr ""
+"<h3>Log In realizado com sucesso</h3>Você foi conectado com sucesso a Central de "
+"Autenticação de Serviços.<br/>Por razões de segurança, faça o Log Out e saia do seu "
+"navegador quando você terminar de acessar os serviços que exigem auntenticação!"
+
+#: cas_server/templates/cas_server/logged.html:8
+msgid "Log me out from all my sessions"
+msgstr "Desconecte-me de todas as sessões"
+
+#: cas_server/templates/cas_server/logged.html:14
+msgid "Forget the identity provider"
+msgstr "Esquecer o provedor de identidade"
+
+#: cas_server/templates/cas_server/logged.html:18
+msgid "Logout"
+msgstr ""
+
+#: cas_server/templates/cas_server/login.html:6
+msgid "Please log in"
+msgstr "Por favor, faça log in"
+
+#: cas_server/templates/cas_server/login.html:14
+msgid "Login"
+msgstr ""
+
+#: cas_server/templates/cas_server/warn.html:9
+msgid "Connect to the service"
+msgstr ""
+
+#: cas_server/utils.py:744
+#, python-format
+msgid "\"%(value)s\" is not a valid regular expression"
+msgstr ""
+
+#: cas_server/views.py:185
+msgid ""
+"<h3>Logout successful</h3>You have successfully logged out from the Central "
+"Authentication Service. For security reasons, close your web browser."
+msgstr ""
+"<h3>Logout realizado com sucesso</h3>Você foi desconectado com sucesso da Central de "
+"Autenticação de Serviços. Por razões de segurança, feche seu navegador."
+
+#: cas_server/views.py:191
+#, python-format
+msgid ""
+"<h3>Logout successful</h3>You have successfully logged out from %s sessions of the "
+"Central Authentication Service. For security reasons, close your web browser."
+msgstr ""
+"<h3>Logout realizado com sucesso</h3>Você foi desconectado com sucesso da %s sessão da "
+"Centralde Autenticação de Serviços. Por razões de segurança, feche seu navegador."
+
+#: cas_server/views.py:198
+msgid ""
+"<h3>Logout successful</h3>You were already logged out from the Central Authentication "
+"Service. For security reasons, close your web browser."
+msgstr ""
+"<h3>Logout realizado com sucesso</h3>Você já está desconectado da Central de "
+"Autenticação de Serviços. Por razões de segurança, feche seu navegador."
+
+#: cas_server/views.py:378
+#, python-format
+msgid ""
+"Invalid response from your identity provider CAS upon ticket %(ticket)s validation: "
+"%(error)r"
+msgstr ""
+"Resposta inválida do provedor de identidade CAS sobre o ticket %(ticket)svalidação: "
+"%(error)r"
+
+#: cas_server/views.py:500
+msgid "Invalid login ticket, please try to log in again"
+msgstr "Ticket de login inválido, por favor tente novamente"
+
+#: cas_server/views.py:693
+#, python-format
+msgid "Authentication has been required by service %(name)s (%(url)s)"
+msgstr "Autenticação requerida pelo serviço %(name)s (%(url)s)"
+
+#: cas_server/views.py:731
+#, python-format
+msgid "Service %(url)s not allowed."
+msgstr "Serviço %(url)s não permitido"
+
+#: cas_server/views.py:738
+msgid "Username not allowed"
+msgstr "Usuário não permitido"
+
+#: cas_server/views.py:745
+msgid "User characteristics not allowed"
+msgstr "Características de usuário não permitida"
+
+#: cas_server/views.py:752
+#, python-format
+msgid "The attribute %(field)s is needed to use that service"
+msgstr "O atributo %(field)s é necessário para usar o serviço"
+
+#: cas_server/views.py:842
+#, python-format
+msgid "Authentication renewal required by service %(name)s (%(url)s)."
+msgstr "Renovação da autenticação requerida pelo serviço %(name)s (%(url)s)."
+
+#: cas_server/views.py:849
+#, python-format
+msgid "Authentication required by service %(name)s (%(url)s)."
+msgstr "Autenticação requerida pelo serviço %(name)s (%(url)s)."
+
+#: cas_server/views.py:856
+#, python-format
+msgid "Service %s not allowed"
+msgstr "Serviço %s não permitido"

cas_server/migrations/0012_auto_20170328_1610.py

@@ -0,0 +1,30 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.10.5 on 2017-03-28 14:10
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('cas_server', '0011_auto_20161007_1258'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='federatediendityprovider',
+            name='cas_protocol_version',
+            field=models.CharField(choices=[('1', 'CAS 1.0'), ('2', 'CAS 2.0'), ('3', 'CAS 3.0'), ('CAS_2_SAML_1_0', 'SAML 1.1')], default='3', help_text='Version of the CAS protocol to use when sending requests the the backend CAS.', max_length=30, verbose_name='CAS protocol version'),
+        ),
+        migrations.AlterField(
+            model_name='servicepattern',
+            name='single_log_out_callback',
+            field=models.CharField(blank=True, default='', help_text='URL where the SLO request will be POST. empty = service url\nThis is usefull for non HTTP proxied services.', max_length=255, verbose_name='single log out callback'),
+        ),
+        migrations.AlterField(
+            model_name='servicepattern',
+            name='user_field',
+            field=models.CharField(blank=True, default='', help_text='Name of the attribute to transmit as username, empty = login', max_length=255, verbose_name='user field'),
+        ),
+    ]

cas_server/migrations/0013_auto_20170329_1748.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.10.5 on 2017-03-29 15:48
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('cas_server', '0012_auto_20170328_1610'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='user',
+            name='username',
+            field=models.CharField(max_length=250),
+        ),
+    ]

cas_server/models.py

@@ -273,7 +273,7 @@ class User(models.Model):
     #: The session key of the current authenticated user
     session_key = models.CharField(max_length=40, blank=True, null=True)
     #: The username of the current authenticated user
-    username = models.CharField(max_length=30)
+    username = models.CharField(max_length=250)
     #: Last time the authenticated user has do something (auth, fetch ticket, etc…)
     date = models.DateTimeField(auto_now=True)
     #: last time the user logged

cas_server/templates/cas_server/base.html

@@ -58,7 +58,7 @@
                         class="alert alert-danger"
                     {% endif %}
                 {% endspaceless %}>
-                    <p>{{message|safe}}</p>
+                    <p>{{message}}</p>
                 </div>
             {% endfor %}
             {% if auto_submit %}</noscript>{% endif %}

cas_server/templates/cas_server/logout.html

@@ -2,6 +2,6 @@
 {% load staticfiles %}
 {% load i18n %}
 {% block content %}
-<div class="alert alert-success" role="alert">{{logout_msg|safe}}</div>
+<div class="alert alert-success" role="alert">{{logout_msg}}</div>
 {% endblock %}
 

cas_server/tests/test_view.py

@@ -295,6 +295,24 @@ class LoginTestCase(TestCase, BaseServicePattern, CanLogin):
             ) in response.content
         )
 
+    @override_settings(CAS_SHOW_SERVICE_MESSAGES=False)
+    def test_view_login_get_allowed_service_no_message(self):
+        """Request a ticket for an allowed service by an unauthenticated client"""
+        # get a bare new http client
+        client = Client()
+        # we are not authenticated and are asking for a ticket for https://www.example.com
+        # which is a valid service matched by self.service_pattern
+        response = client.get("/login?service=https://www.example.com")
+        # the login page should be displayed
+        self.assertEqual(response.status_code, 200)
+        # we warn the user why it need to authenticated
+        self.assertFalse(
+            (
+                b"Authentication required by service "
+                b"example (https://www.example.com)"
+            ) in response.content
+        )
+
     def test_view_login_get_denied_service(self):
         """Request a ticket for an denied service by an unauthenticated client"""
         # get a bare new http client
@@ -306,6 +324,18 @@ class LoginTestCase(TestCase, BaseServicePattern, CanLogin):
         # we warn the user that https://www.example.net is not an allowed service url
         self.assertTrue(b"Service https://www.example.net not allowed" in response.content)
 
+    @override_settings(CAS_SHOW_SERVICE_MESSAGES=False)
+    def test_view_login_get_denied_service_no_message(self):
+        """Request a ticket for an denied service by an unauthenticated client"""
+        # get a bare new http client
+        client = Client()
+        # we are not authenticated and are asking for a ticket for https://www.example.net
+        # which is NOT a valid service
+        response = client.get("/login?service=https://www.example.net")
+        self.assertEqual(response.status_code, 200)
+        # we warn the user that https://www.example.net is not an allowed service url
+        self.assertFalse(b"Service https://www.example.net not allowed" in response.content)
+
     def test_view_login_get_auth_allowed_service(self):
         """Request a ticket for an allowed service by an authenticated client"""
         # get a client that is already authenticated
@@ -505,6 +535,40 @@ class LoginTestCase(TestCase, BaseServicePattern, CanLogin):
         # renewing authentication is done in the validate and serviceValidate views tests
         self.assertEqual(ticket.renew, True)
 
+    @override_settings(CAS_SHOW_SERVICE_MESSAGES=False)
+    def test_renew_message_disabled(self):
+        """test the authentication renewal request from a service"""
+        # use the default test service
+        service = "https://www.example.com"
+        # get a client that is already authenticated
+        client = get_auth_client()
+        # ask for a ticket for the service but aks for authentication renewal
+        response = client.get("/login", {'service': service, 'renew': 'on'})
+        # we are ask to reauthenticate and tell the user why
+        self.assertEqual(response.status_code, 200)
+        self.assertFalse(
+            (
+                b"Authentication renewal required by "
+                b"service example (https://www.example.com)"
+            ) in response.content
+        )
+        # get the form default parameter
+        params = copy_form(response.context["form"])
+        # set valid username/password
+        params["username"] = settings.CAS_TEST_USER
+        params["password"] = settings.CAS_TEST_PASSWORD
+        # the renew parameter from the form should be True
+        self.assertEqual(params["renew"], True)
+        # post the authentication request
+        response = client.post("/login", params)
+        # the request succed, a ticket is created and we are redirected to the service url
+        self.assertEqual(response.status_code, 302)
+        ticket_value = response['Location'].split('ticket=')[-1]
+        ticket = models.ServiceTicket.objects.get(value=ticket_value)
+        # the created ticket is marked has being gottent after a renew. Futher testing about
+        # renewing authentication is done in the validate and serviceValidate views tests
+        self.assertEqual(ticket.renew, True)
+
     @override_settings(CAS_ENABLE_AJAX_AUTH=True)
     def test_ajax_login_required(self):
         """

cas_server/views.py

@@ -23,6 +23,7 @@ from django.views.decorators.csrf import csrf_exempt
 from django.middleware.csrf import CsrfViewMiddleware
 from django.views.generic import View
 from django.utils.encoding import python_2_unicode_compatible
+from django.utils.safestring import mark_safe
 
 import re
 import logging
@@ -181,24 +182,24 @@ class LogoutView(View, LogoutMixin):
         else:
             # build logout message depending of the number of sessions the user logs out
             if session_nb == 1:
-                logout_msg = _(
+                logout_msg = mark_safe(_(
                     "<h3>Logout successful</h3>"
                     "You have successfully logged out from the Central Authentication Service. "
                     "For security reasons, close your web browser."
-                )
+                ))
             elif session_nb > 1:
-                logout_msg = _(
+                logout_msg = mark_safe(_(
                     "<h3>Logout successful</h3>"
-                    "You have successfully logged out from %s sessions of the Central "
+                    "You have successfully logged out from %d sessions of the Central "
                     "Authentication Service. "
                     "For security reasons, close your web browser."
-                ) % session_nb
+                ) % session_nb)
             else:
-                logout_msg = _(
+                logout_msg = mark_safe(_(
                     "<h3>Logout successful</h3>"
                     "You were already logged out from the Central Authentication Service. "
                     "For security reasons, close your web browser."
-                )
+                ))
 
             # depending of settings, redirect to the login page with a logout message or display
             # the logout page. The default is to display tge logout page.
@@ -835,6 +836,8 @@ class LoginView(View, LogoutMixin):
                     # clean messages before leaving django
                     list(messages.get_messages(self.request))
                     return HttpResponseRedirect(self.service)
+
+                if settings.CAS_SHOW_SERVICE_MESSAGES:
                     if self.request.session.get("authenticated") and self.renew:
                         messages.add_message(
                             self.request,
@@ -850,6 +853,7 @@ class LoginView(View, LogoutMixin):
                             {'name': service_pattern.name, 'url': self.service}
                         )
             except ServicePattern.DoesNotExist:
+                if settings.CAS_SHOW_SERVICE_MESSAGES:
                     messages.add_message(
                         self.request,
                         messages.ERROR,