diff --git a/composer.json b/composer.json
index 674123b..f147509 100644
--- a/composer.json
+++ b/composer.json
@@ -27,7 +27,8 @@
         "ext-pdo": "^7.3",
         "ext-json": "*",
         "ext-yaml": "^2.0",
-        "league/mime-type-detection": "^1.11"
+        "league/mime-type-detection": "^1.11",
+        "apereo/phpcas": "^1.6"
     },
     "require-dev": {
         "phpstan/phpstan": "^1.9"
diff --git a/example/includes/config.yml b/example/includes/config.yml
index 1f1c5b3..1b2794f 100644
--- a/example/includes/config.yml
+++ b/example/includes/config.yml
@@ -134,6 +134,140 @@ db:
   #datetime_format: '%Y-%m-%d %H:%M:%S'  # Exemple : 2018-10-12 18:06:59
 
 
+#
+# Authentication
+#
+auth:
+  # Enabled authentication
+  enabled: false
+
+  # Methods to authenticate users
+  methods:
+    - form
+    - http
+    #- cas
+
+  # User backends
+  backends:
+    - ldap
+
+  #
+  # Login form
+  #
+  login_form:
+    # Display link for other authentication methods
+    # Note: method as key and label as value
+    display_other_methods:
+      http: "HTTP"
+      cas: "SSO"
+
+  #
+  # HTTP Authentication Configuration
+  #
+  http:
+    # HTTP Auth methods :
+    # * AUTHORIZATION : use HTTP_AUTHORIZATION environnement. This mode could be use with PHP FPM.
+    #                   Specific configuration is need in Apache to use this mode :
+    #                   RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
+    # * REMOTE_USER   : use REMOTE_USER environnement variable to retreive authenticated user's login
+    #                   This method could be only used with $http_auth_trust_without_password_challenge
+    #                   enabled.
+    # * PHP_AUTH      : use PHP_AUTH_USER and PHP_AUTH_PW environnement variables (only available
+    #                   using mod_php with Apache. (default)
+    method: 'PHP_AUTH'
+
+    # Trust HTTP server authentication
+    # If enabled, the application will no check user credentials and only retreive user's login
+    # from HTTP server.
+    #trust_without_password_challenge: true
+
+    # Realm (use when force HTTP login, optional)
+    #realm: "Authentication required"
+
+  #
+  # CAS Configuration
+  #
+  cas:
+    # CAS host (just the domain name)
+    host: 'idp.example.com'
+
+    # CAS context (the root path, default: '/idp/cas')
+    # Example: for 'http://idp.example.com/idp/cas', put '/idp/cas'
+    context: '/idp/cas'
+
+    # CAS HTTP port (default: 443)
+    #port: 443
+
+    # CAS procotol version
+    # Posssible values: "1.0", "2.0" (default), "3.0" or "S1" (SAML1)
+    #version: '2.0'
+
+    # CAS server SSL certificate validation (set to false to disable)
+    ca_cert_certificate_path: "/etc/ssl/certs/ca-certificates.crt"
+
+    # CAS Debug log file
+    #debug_log_file: "${root_directory_path}/data/logs/cas.log"
+
+    # CAS Logout
+    #logout: true  # Enable CAS logout on app logout
+    #logout_url: "https://my.example.fr/logout/"  # Specify custom CAS logout URL
+
+    # CAS Fake authenticated user
+    #fake_authenticated_user: 'myusername'
+
+  #
+  # LDAP user backend
+  #
+  ldap:
+    # LDAP host (required, multiple hosts could be specified with comma separator)
+    host: 'ldap://localhost'
+
+    # LDAP port (optional)
+    #port: 389
+
+    # Enable STARTTLS (optional, default: false)
+    #starttls: false
+
+    # LDAP directory base DN (required)
+    basedn: 'o=example'
+
+    # LDAP bind DN (optional)
+    #bind_dn: 'uid=eesyphp,ou=sysaccounts,${auth.ldap.basedn}'
+
+    # LDAP bind password (optional)
+    #bind_password: 'secret'
+
+    # User search filter by username. The keyword "[username]" will be replace before search by
+    # the looked username (default: "uid=[username]")
+    #user_filter_by_uid: 'uid=[username]'
+
+    # User base DN
+    user_basedn: 'ou=people,${auth.ldap.basedn}'
+
+    # Bind with username instead of user DN (optional, default: false)
+    #bind_with_username: true
+
+    # LDAP user attributes to retreive with their properties:
+    # [LDAP attr name]:
+    #   name: [map name]       # optional, default: LDAP attr name
+    #   type: [type of value]  # optional, default: 'string', possible values: string, bool, int, float
+    #   multivalued: true      # optional, default: false
+    #   default: null          # optional, default: null
+    user_attributes:
+      uid:
+        name: 'login'
+        multivalued: false
+        default: null
+      cn:
+        name: 'name'
+        multivalued: false
+        default: null
+      mail:
+        type: 'string'
+
+    # PEAR Net_LDAP2 library path (optional, default: Net/LDAP2.php)
+    #netldap2_path: 'Net/LDAP2.php'
+
 #
 # Email configuration
 #
diff --git a/locales/fr_FR.UTF8/LC_MESSAGES/EESYPHP.mo b/locales/fr_FR.UTF8/LC_MESSAGES/EESYPHP.mo
index 94e8e7a..000bbdf 100644
Binary files a/locales/fr_FR.UTF8/LC_MESSAGES/EESYPHP.mo and b/locales/fr_FR.UTF8/LC_MESSAGES/EESYPHP.mo differ
diff --git a/locales/fr_FR.UTF8/LC_MESSAGES/EESYPHP.po b/locales/fr_FR.UTF8/LC_MESSAGES/EESYPHP.po
index d15d8bd..d93a61b 100644
--- a/locales/fr_FR.UTF8/LC_MESSAGES/EESYPHP.po
+++ b/locales/fr_FR.UTF8/LC_MESSAGES/EESYPHP.po
@@ -1,7 +1,7 @@
 msgid ""
 msgstr ""
 "Project-Id-Version: \n"
-"POT-Creation-Date: 2023-02-14 01:17+0100\n"
+"POT-Creation-Date: 2023-02-25 04:54+0100\n"
 "PO-Revision-Date: \n"
 "Last-Translator: Benjamin Renard <brenard@zionetrix.net>\n"
 "Language-Team: \n"
@@ -70,6 +70,22 @@ msgstr "Une exception est survenue en exécutant la commande %s"
 msgid "Unable to connect to the database."
 msgstr "Impossible de se connecter à la base de données."
 
+#: Auth/Form.php:32
+msgid "Invalid username or password."
+msgstr "Nom d'utilisateur ou mot de passe invalide."
+
+#: Auth/Http.php:34 Url.php:176
+msgid "Authentication required"
+msgstr "Authentification requise"
+
+#: Auth/Http.php:115 Auth/Http.php:118 Url.php:180
+msgid "Access denied"
+msgstr "Accès interdit"
+
+#: Auth/Http.php:119 Auth/Http.php:123
+msgid "You must login to access this page."
+msgstr "Vous devez vous connecter pour accéder à cette page."
+
 #: Email.php:141
 #, php-format
 msgid "</hr><p><small>Mail initialy intended for %s.</small></p>"
@@ -102,35 +118,27 @@ msgstr ""
 "\n"
 "%s: %s"
 
-#: Tpl.php:355
+#: Tpl.php:394
 msgid "No template specified."
 msgstr "Aucun template spécifié."
 
-#: Tpl.php:386
+#: Tpl.php:425
 msgid "An error occurred while displaying this page."
 msgstr "Une erreur est survenue en affichant cette page."
 
-#: Url.php:141
+#: Url.php:172
 msgid "Bad request"
 msgstr "Mauvaise requête"
 
-#: Url.php:142
+#: Url.php:173
 msgid "Invalid request."
 msgstr "Requête invalide."
 
-#: Url.php:145
-msgid "Authentication required"
-msgstr "Authentification requise"
-
-#: Url.php:146
+#: Url.php:177
 msgid "You have to be authenticated to access to this page."
 msgstr "Vous devez être authentifié pour accéder à cette page."
 
-#: Url.php:149
-msgid "Access denied"
-msgstr "Accès interdit"
-
-#: Url.php:150
+#: Url.php:181
 msgid ""
 "You do not have access to this application. If you think this is an error, "
 "please contact support."
@@ -138,25 +146,25 @@ msgstr ""
 "Vous n'avez pas accès à cette application. Si vous pensez qu'il s'agit d'une "
 "erreur, merci de prendre contact avec le support."
 
-#: Url.php:153
+#: Url.php:184
 msgid "Whoops ! Page not found"
 msgstr "Oups ! Page introuvable"
 
-#: Url.php:154
+#: Url.php:185
 msgid "The requested page can not be found."
 msgstr "La page demandée est introuvable."
 
-#: Url.php:162
+#: Url.php:193
 msgid "Error"
 msgstr "Erreur"
 
-#: Url.php:163
+#: Url.php:194
 msgid "An unknown error occurred. If problem persist, please contact support."
 msgstr ""
 "Une erreur inconnue est survenue. Si le problème persiste, merci de prendre "
 "contact avec le support."
 
-#: Url.php:226
+#: Url.php:257
 msgid ""
 "Unable to determine the requested page. If the problem persists, please "
 "contact support."
@@ -164,7 +172,7 @@ msgstr ""
 "Impossible de déterminer la page demandée. Si le problème persiste, merci de "
 "prendre contact avec le support."
 
-#: Url.php:376
+#: Url.php:411
 msgid ""
 "Unable to determine the requested page (loop detected). If the problem "
 "persists, please contact support."
@@ -172,22 +180,19 @@ msgstr ""
 "Impossible de déterminer la page demandée (boucle détectée). Si le problème "
 "persiste, merci de prendre contact avec le support."
 
-#: Url.php:407
+#: Url.php:441
 msgid "This request cannot be processed."
 msgstr "Cette requête ne peut être traitée."
 
-#: Url.php:420
-msgid ""
-"Authentication required but force_authentication function is not defined."
-msgstr ""
-"Authentification requise mais la fonction force_authentication n'est pas "
-"définie."
+#: Url.php:451
+msgid "Authentication required but fail to authenticate you."
+msgstr "Authentification requise mais impossible pour vous authentifier."
 
-#: Url.php:429
+#: Url.php:460
 msgid "This request could not be processed correctly."
 msgstr "Cette requête n'a put être traitée correctement."
 
-#: I18n.php:122 App.php:120
+#: I18n.php:122 App.php:124
 msgid "Hello world !"
 msgstr "Bonjour tout le monde !"
 
@@ -379,10 +384,18 @@ msgstr "Impossible d'écrire le fichier du catalogue JS %s (%s)."
 msgid "%s JS catalog writed (%s)."
 msgstr "Catalogue JS %s créé (%s)."
 
-#: App.php:122
+#: App.php:126
 msgid "Hello world!"
 msgstr "Salut tout le monde !"
 
+#: App.php:137
+msgid "Disconnected"
+msgstr "Déconnecté"
+
+#: App.php:139
+msgid "You are now disconnected."
+msgstr "Vous êtes maintenant déconnecté."
+
 #: static/js/myconfirm.js:4 static/js/myconfirm.js:171
 #: static/js/myconfirm.js:200
 msgid "Confirmation"
@@ -460,3 +473,29 @@ msgstr ""
 "framework EesyPHP. Configurez votre propre dossier de templates et créer le "
 "fichier <em>homepage.tpl</em> pour l'écraser. Vous pouvez également écraser "
 "le gestionnaire de l'URL racine de l'application web."
+
+#: templates/empty.tpl:60
+msgid "Logout"
+msgstr "Déconnexion"
+
+#: templates/login.tpl:2
+msgid "Connection"
+msgstr "Connexion"
+
+#: templates/login.tpl:7
+msgid "Username"
+msgstr "Nom d'utilisateur"
+
+#: templates/login.tpl:11
+msgid "Password"
+msgstr "Mot de passe"
+
+#: templates/login.tpl:14
+msgid "Submit"
+msgstr "Envoyer"
+
+#~ msgid ""
+#~ "Authentication required but force_authentication function is not defined."
+#~ msgstr ""
+#~ "Authentification requise mais la fonction force_authentication n'est pas "
+#~ "définie."
diff --git a/locales/headers.pot b/locales/headers.pot
index 7d2ed67..93eecfd 100644
--- a/locales/headers.pot
+++ b/locales/headers.pot
@@ -1,7 +1,7 @@
 msgid ""
 msgstr ""
-"POT-Creation-Date: 2023-02-14 01:17+0100\n"
-"PO-Revision-Date: 2023-02-14 01:17+0100\n"
+"POT-Creation-Date: 2023-02-25 04:54+0100\n"
+"PO-Revision-Date: 2023-02-25 04:54+0100\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=utf-8\n"
 "Content-Transfer-Encoding: 8bit\n"
\ No newline at end of file
diff --git a/locales/messages.pot b/locales/messages.pot
index c3a2ba7..10c1bd5 100644
--- a/locales/messages.pot
+++ b/locales/messages.pot
@@ -1,7 +1,7 @@
 msgid ""
 msgstr ""
-"POT-Creation-Date: 2023-02-14 01:17+0100\n"
-"PO-Revision-Date: 2023-02-14 01:17+0100\n"
+"POT-Creation-Date: 2023-02-25 04:54+0100\n"
+"PO-Revision-Date: 2023-02-25 04:54+0100\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
@@ -61,6 +61,22 @@ msgstr ""
 msgid "Unable to connect to the database."
 msgstr ""
 
+#: Auth/Form.php:32
+msgid "Invalid username or password."
+msgstr ""
+
+#: Auth/Http.php:34 Url.php:176
+msgid "Authentication required"
+msgstr ""
+
+#: Auth/Http.php:115 Auth/Http.php:118 Url.php:180
+msgid "Access denied"
+msgstr ""
+
+#: Auth/Http.php:119 Auth/Http.php:123
+msgid "You must login to access this page."
+msgstr ""
+
 #: Email.php:141
 #, php-format
 msgid "</hr><p><small>Mail initialy intended for %s.</small></p>"
@@ -87,82 +103,73 @@ msgid ""
 "%s: %s"
 msgstr ""
 
-#: Tpl.php:355
+#: Tpl.php:394
 msgid "No template specified."
 msgstr ""
 
-#: Tpl.php:386
+#: Tpl.php:425
 msgid "An error occurred while displaying this page."
 msgstr ""
 
-#: Url.php:141
+#: Url.php:172
 msgid "Bad request"
 msgstr ""
 
-#: Url.php:142
+#: Url.php:173
 msgid "Invalid request."
 msgstr ""
 
-#: Url.php:145
-msgid "Authentication required"
-msgstr ""
-
-#: Url.php:146
+#: Url.php:177
 msgid "You have to be authenticated to access to this page."
 msgstr ""
 
-#: Url.php:149
-msgid "Access denied"
-msgstr ""
-
-#: Url.php:150
+#: Url.php:181
 msgid ""
 "You do not have access to this application. If you think this is an error, "
 "please contact support."
 msgstr ""
 
-#: Url.php:153
+#: Url.php:184
 msgid "Whoops ! Page not found"
 msgstr ""
 
-#: Url.php:154
+#: Url.php:185
 msgid "The requested page can not be found."
 msgstr ""
 
-#: Url.php:162
+#: Url.php:193
 msgid "Error"
 msgstr ""
 
-#: Url.php:163
+#: Url.php:194
 msgid "An unknown error occurred. If problem persist, please contact support."
 msgstr ""
 
-#: Url.php:226
+#: Url.php:257
 msgid ""
 "Unable to determine the requested page. If the problem persists, please "
 "contact support."
 msgstr ""
 
-#: Url.php:376
+#: Url.php:411
 msgid ""
 "Unable to determine the requested page (loop detected). If the problem "
 "persists, please contact support."
 msgstr ""
 
-#: Url.php:407
+#: Url.php:441
 msgid "This request cannot be processed."
 msgstr ""
 
-#: Url.php:420
-msgid ""
-"Authentication required but force_authentication function is not defined."
+#: Url.php:451
+msgid "Authentication required but fail to authenticate you."
 msgstr ""
 
-#: Url.php:429
+#: Url.php:460
 msgid "This request could not be processed correctly."
 msgstr ""
 
-#: I18n.php:122 App.php:120
+#: I18n.php:122 App.php:124
 msgid "Hello world !"
 msgstr ""
 
@@ -321,10 +328,18 @@ msgstr ""
 msgid "%s JS catalog writed (%s)."
 msgstr ""
 
-#: App.php:122
+#: App.php:126
 msgid "Hello world!"
 msgstr ""
 
+#: App.php:137
+msgid "Disconnected"
+msgstr ""
+
+#: App.php:139
+msgid "You are now disconnected."
+msgstr ""
+
 #: static/js/myconfirm.js:4 static/js/myconfirm.js:171
 #: static/js/myconfirm.js:200
 msgid "Confirmation"
@@ -395,3 +410,23 @@ msgid ""
 "it. You could also overwrite the URL handler for the root of the web "
 "application."
 msgstr ""
+
+#: templates/empty.tpl:60
+msgid "Logout"
+msgstr ""
+
+#: templates/login.tpl:2
+msgid "Connection"
+msgstr ""
+
+#: templates/login.tpl:7
+msgid "Username"
+msgstr ""
+
+#: templates/login.tpl:11
+msgid "Password"
+msgstr ""
+
+#: templates/login.tpl:14
+msgid "Submit"
+msgstr ""
diff --git a/locales/php-messages.pot b/locales/php-messages.pot
index 3019565..737a968 100644
--- a/locales/php-messages.pot
+++ b/locales/php-messages.pot
@@ -53,6 +53,22 @@ msgstr ""
 msgid "Unable to connect to the database."
 msgstr ""
 
+#: Auth/Form.php:32
+msgid "Invalid username or password."
+msgstr ""
+
+#: Auth/Http.php:34 Url.php:176
+msgid "Authentication required"
+msgstr ""
+
+#: Auth/Http.php:115 Auth/Http.php:118 Url.php:180
+msgid "Access denied"
+msgstr ""
+
+#: Auth/Http.php:119 Auth/Http.php:123
+msgid "You must login to access this page."
+msgstr ""
+
 #: Email.php:141
 #, php-format
 msgid "</hr><p><small>Mail initialy intended for %s.</small></p>"
@@ -79,82 +95,73 @@ msgid ""
 "%s: %s"
 msgstr ""
 
-#: Tpl.php:355
+#: Tpl.php:394
 msgid "No template specified."
 msgstr ""
 
-#: Tpl.php:386
+#: Tpl.php:425
 msgid "An error occurred while displaying this page."
 msgstr ""
 
-#: Url.php:141
+#: Url.php:172
 msgid "Bad request"
 msgstr ""
 
-#: Url.php:142
+#: Url.php:173
 msgid "Invalid request."
 msgstr ""
 
-#: Url.php:145
-msgid "Authentication required"
-msgstr ""
-
-#: Url.php:146
+#: Url.php:177
 msgid "You have to be authenticated to access to this page."
 msgstr ""
 
-#: Url.php:149
-msgid "Access denied"
-msgstr ""
-
-#: Url.php:150
+#: Url.php:181
 msgid ""
 "You do not have access to this application. If you think this is an error, "
 "please contact support."
 msgstr ""
 
-#: Url.php:153
+#: Url.php:184
 msgid "Whoops ! Page not found"
 msgstr ""
 
-#: Url.php:154
+#: Url.php:185
 msgid "The requested page can not be found."
 msgstr ""
 
-#: Url.php:162
+#: Url.php:193
 msgid "Error"
 msgstr ""
 
-#: Url.php:163
+#: Url.php:194
 msgid "An unknown error occurred. If problem persist, please contact support."
 msgstr ""
 
-#: Url.php:226
+#: Url.php:257
 msgid ""
 "Unable to determine the requested page. If the problem persists, please "
 "contact support."
 msgstr ""
 
-#: Url.php:376
+#: Url.php:411
 msgid ""
 "Unable to determine the requested page (loop detected). If the problem "
 "persists, please contact support."
 msgstr ""
 
-#: Url.php:407
+#: Url.php:441
 msgid "This request cannot be processed."
 msgstr ""
 
-#: Url.php:420
-msgid ""
-"Authentication required but force_authentication function is not defined."
+#: Url.php:451
+msgid "Authentication required but fail to authenticate you."
 msgstr ""
 
-#: Url.php:429
+#: Url.php:460
 msgid "This request could not be processed correctly."
 msgstr ""
 
-#: I18n.php:122 App.php:120
+#: I18n.php:122 App.php:124
 msgid "Hello world !"
 msgstr ""
 
@@ -313,6 +320,14 @@ msgstr ""
 msgid "%s JS catalog writed (%s)."
 msgstr ""
 
-#: App.php:122
+#: App.php:126
 msgid "Hello world!"
 msgstr ""
+
+#: App.php:137
+msgid "Disconnected"
+msgstr ""
+
+#: App.php:139
+msgid "You are now disconnected."
+msgstr ""
diff --git a/locales/templates-0-messages.pot b/locales/templates-0-messages.pot
index fd2244d..e239bf1 100644
--- a/locales/templates-0-messages.pot
+++ b/locales/templates-0-messages.pot
@@ -19,6 +19,14 @@ msgstr ""
 msgid "Back"
 msgstr ""
 
+#: templates/logout.tpl:5
+msgid "Disconnected"
+msgstr ""
+
+#: templates/logout.tpl:6
+msgid "You are now disconnected."
+msgstr ""
+
 #: templates/homepage.tpl:5
 msgid "Hello, world!"
 msgstr ""
@@ -30,3 +38,31 @@ msgid ""
 "it. You could also overwrite the URL handler for the root of the web "
 "application."
 msgstr ""
+
+#: templates/empty.tpl:60
+msgid "Logout"
+msgstr ""
+
+#: templates/login.tpl:2
+msgid "Connection"
+msgstr ""
+
+#: templates/login.tpl:7
+msgid "Username"
+msgstr ""
+
+#: templates/login.tpl:11
+msgid "Password"
+msgstr ""
+
+#: templates/login.tpl:14
+msgid "Submit"
+msgstr ""
+
+#: templates/must_login.tpl:5
+msgid "Access denied"
+msgstr ""
+
+#: templates/must_login.tpl:6
+msgid "You must login to access this page."
+msgstr ""
diff --git a/phpstan.neon b/phpstan.neon
index 1fc57c9..8fbe194 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -8,8 +8,22 @@ parameters:
         - example/includes/config.local.php
         - example/data/tmp/templates_c
     universalObjectCratesClasses:
+        - EesyPHP\HookEvent
         - EesyPHP\UrlRequest
+        - EesyPHP\Auth\User
     ignoreErrors:
+        -
+            message: "#Property EesyPHP\\\\Auth\\\\Ldap::\\$connection has unknown class Net_LDAP2 as its type\\.#"
+            path: src/Auth/Ldap.php
+        -
+            message: "#Call to method search\\(\\) on an unknown class Net_LDAP2\\.#"
+            path: src/Auth/Ldap.php
+        -
+            message: "#Call to static method connect\\(\\) on an unknown class Net_LDAP2\\.#"
+            path: src/Auth/Ldap.php
+        -
+            message: "#Call to static method escape\\(\\) on an unknown class Net_LDAP2_Filter\\.#"
+            path: src/Auth/Ldap.php
         -
             message: "#Instantiated class Mail_mime not found\\.#"
             path: src/Email.php
diff --git a/src/App.php b/src/App.php
index d0b2da5..1b56f66 100644
--- a/src/App.php
+++ b/src/App.php
@@ -64,6 +64,10 @@ class App {
       Url::init();
       Url :: add_url_handler('#^$#', array('EesyPHP\\App', 'handle_homepage'));
     }
+    if (Auth :: enabled()) {
+      Auth :: init();
+      Url :: add_url_handler('#^logout$#', array('EesyPHP\\App', 'handle_logout'), null, false);
+    }
     if (self :: get('mail.enabled', true, 'bool'))
       Email :: init();
     if (self :: get('i18n.enabled', true, 'bool'))
@@ -122,4 +126,17 @@ class App {
       echo "<h1>".I18n::_("Hello world!")."</h1>";
   }
 
+  /**
+   * Default logout handler
+   * @param UrlRequest $request
+   * @return void
+   */
+  public static function handle_logout($request) {
+    Auth::logout();
+    if (Tpl::initialized())
+      Tpl :: display("logout.tpl", I18n::_("Disconnected"));
+    else
+      echo "<h1>".I18n::_("You are now disconnected.")."</h1>";
+  }
+
 }
diff --git a/src/Auth.php b/src/Auth.php
new file mode 100644
index 0000000..67ddf99
--- /dev/null
+++ b/src/Auth.php
@@ -0,0 +1,306 @@
+<?php
+
+namespace EesyPHP;
+
+
+class Auth {
+
+  /**
+   * Initialized methods
+   * @var array<string,string>
+   */
+  private static $methods = array();
+
+  /**
+   * Method name used to authenticate current user
+   * @var string|null
+   */
+  private static $logged_method = null;
+
+  /**
+   * Initialized backends
+   * @var array<string,string>
+   */
+  private static $backends = array();
+
+  /**
+   * Current authenticated user
+   * @var \EesyPHP\Auth\User|null
+   */
+  private static $user = null;
+
+  /**
+   * Initialize
+   * @return void
+   */
+  public static function init() {
+    if (!self :: enabled()) return;
+    self :: $methods = array();
+    foreach(App::get('auth.methods', array(), 'array') as $method) {
+      if (!$method || !is_string($method)) {
+        Log::warning(
+          'Auth Init: Invalid auth method retreive from configuration, ignore it: %s',
+          vardump($method));
+        continue;
+      }
+      $class = (
+        $method[0] == '\\'?
+        $method:
+        "\\EesyPHP\\Auth\\".ucfirst($method)
+      );
+      if (!class_exists($class)) {
+        Log::warning(
+          "Auth Init: Unknown auth method '%s' retreived from configuration, ignore it",
+          $method
+        );
+        continue;
+      }
+      $parents = class_parents($class);
+      if (!is_array($parents) || !in_array('EesyPHP\\Auth\\Method', $parents)) {
+        Log::warning(
+          'Auth Init: Auth method %s class (%s) do not derivate from \\EesyPHP\\Auth\\Method '.
+          'class, ignore it.',
+          $method, $class);
+        continue;
+      }
+
+      if (!call_user_func(array($class, 'init'))) {
+        Log::warning(
+          'Auth Init: fail to initialize auth method %s, ignore it',
+          $method, $class);
+        continue;
+      }
+      Log::trace('Auth method %s initialized (class %s)', $method, $class);
+      self :: $methods[strtolower($method)] = $class;
+    }
+
+    self :: $backends = array();
+    foreach(App::get('auth.backends', array(), 'array') as $backend) {
+      if (!$backend || !is_string($backend)) {
+        Log::warning(
+          'Auth Init: Invalid auth backend retreive from configuration, ignore it: %s',
+          vardump($backend));
+        continue;
+      }
+      $class = (
+        $backend[0] == '\\'?
+        $backend:
+        "\\EesyPHP\\Auth\\".ucfirst($backend)
+      );
+      if (!class_exists($class)) {
+        Log::warning(
+          "Auth Init: Unknown auth backend '%s' retreived from configuration, ignore it",
+          $backend
+        );
+        continue;
+      }
+      $parents = class_parents($class);
+      if (!is_array($parents) || !in_array('EesyPHP\\Auth\\Backend', $parents)) {
+        Log::warning(
+          'Auth Init: Auth backend %s class (%s) do not derivate from \\EesyPHP\\Auth\\Backend '.
+          'class, ignore it.',
+          $backend, $class);
+        continue;
+      }
+
+      if (!call_user_func(array($class, 'init'))) {
+        Log::warning(
+          'Auth Init: fail to initialize auth backend %s, ignore it',
+          $backend, $class);
+        continue;
+      }
+      Log::trace('Auth backend %s initialized (class %s)', $backend, $class);
+      self :: $backends[strtolower($backend)] = $class;
+    }
+  }
+
+  /**
+   * Check if authentication is enabled
+   * @return bool
+   */
+  public static function enabled() {
+    if (!is_null(App::get('auth.enabled', null, 'bool')))
+      return App::get('auth.enabled', false, 'bool');
+    if (App::get('auth.methods', array(), 'array') && App::get('auth.backends', array(), 'array'))
+      return true;
+    Log :: trace('Authentication is disabled');
+    return false;
+  }
+
+  /**
+   * Check if a authentification method is enabled
+   * @param string $method
+   * @return bool
+   */
+  public static function method_is_enabled($method) {
+    return array_key_exists(strtolower($method), self :: $methods);
+  }
+
+  /**
+   * Get user by username
+   * @param string $username
+   * @param boolean $first Return only the first matched user (if authorized, optional, default: true)
+   * @return \EesyPHP\Auth\User|array<\EesyPHP\Auth\User>|null|false The user object if found, null it not, false in case of error
+   */
+  public static function get_user($username, $first=true) {
+    if (!self :: $backends) {
+      Log :: warning("No auth backend registered, can't retreive user");
+      return false;
+    }
+    $users = array();
+    foreach (self :: $backends as $backend) {
+      $user = call_user_func(array($backend, 'get_user'), $username);
+      if ($user) $users[] = $user;
+    }
+    if (!$users) return null;
+    if (count($users) > 1 && !App::get('auth.allow_multiple_match', false, 'bool')) {
+      Log :: error('Multiple user found for username "%s":\n%s', $username, vardump($users));
+      return false;
+    }
+    return $first?$users[0]:$users;
+  }
+
+  /**
+   * Search user by username and check its password
+   * @param string $username The username
+   * @param string $password The password to check
+   * @return \EesyPHP\Auth\User|null|false
+   */
+  public static function authenticate($username, $password) {
+    $users = self :: get_user($username, false);
+    if (!$users) return $users === false?false:null;
+
+    $auth_users = array();
+    foreach ($users as $user) {
+      if ($user->check_password($password))
+        $auth_users[] = $user;
+    }
+    if (!$auth_users) return null;
+    if (
+      count($auth_users) > 1
+      && !App::get(
+        'auth.allow_multiple_match_with_valid_password',
+        App::get('auth.allow_multiple_match', false, 'bool'),
+        'bool'
+      )
+    ) {
+      Log :: error(
+        'Multiple user match for username "%s" and provided password:\n%s',
+        $username, vardump($auth_users));
+      return false;
+    }
+    return $auth_users[0];
+  }
+
+  /**
+   * Log user
+   * @param bool|string $force Force user authentication: could specified desired method or true
+   *                           to use the first one (optional, default: false)
+   * @param null|string $with_method Specify with which method(s) login user (optional, default: all methods)
+   * @return \EesyPHP\Auth\User|null|false
+   */
+  public static function login($force=false, $with_method=null) {
+    // Check if already logged in
+    if (self :: $user)
+      return self :: $user;
+
+    // Check if logged in session
+    if (isset($_SESSION['user']) && isset($_SESSION['auth_method'])) {
+      $user = unserialize($_SESSION['user']);
+      if (is_a($user, '\\EesyPHP\\Auth\\User')) {
+        self :: $user = $user;
+        self :: $logged_method = (
+          array_key_exists($_SESSION['auth_method'], self :: $methods)?
+          $_SESSION['auth_method']:null
+        );
+        Log :: debug(
+          'User %s authenticated from session (method %s and backend %s)',
+          $user->username,
+          self :: $logged_method?self :: $logged_method:'unknown',
+          $user->backend);
+        return $user;
+      }
+      Log::warning('Invalid user data in session, drop it');
+      // Otherwise, drop user in session
+      unset($_SESSION['user']);
+      unset($_SESSION['auth_method']);
+    }
+
+    if (!self :: $methods) {
+      Log :: warning("No auth method registered, can't authenticate users");
+      return false;
+    }
+
+    // Otherwise, log without enforcing by using registered methods
+    foreach (self :: $methods as $method => $class) {
+      if ($with_method && !in_array($method, array_map('strtolower', ensure_is_array($with_method))))
+        continue;
+      $user = call_user_func(array($class, 'login'));
+      if ($user) {
+        self :: set_user($user, $method);
+        return $user;
+      }
+    }
+
+    // If still not logged and force mode enable, force login using specified method (or the first one)
+    if ($force) {
+      $method = (
+        is_string($force) && array_key_exists($force, self :: $methods)?
+        $force:key(self :: $methods)
+      );
+      Log::debug('Force authentication using method %s', $method);
+      $user = call_user_func(array(self :: $methods[$method], 'login'), true);
+      if ($user) {
+        self :: set_user($user, $method);
+        return $user;
+      }
+      return false;
+    }
+    return null;
+  }
+
+  /**
+   * Helper to set current authenticated user
+   * @param \EesyPHP\Auth\User $user The current authenticated user object
+   * @param string $method Method used to authenticate the user
+   * @return void
+   */
+  private static function set_user($user, $method) {
+    Log :: debug(
+      'User %s authenticated using method %s and backend %s',
+      $user->username, $method, $user->backend);
+    self :: $user = $user;
+    self :: $logged_method = $method;
+    $_SESSION['user'] = serialize($user);
+    $_SESSION['auth_method'] = $method;
+    Hook :: trigger('logged_in', array('method' => $method, 'user' => $user));
+  }
+
+  /**
+   * Logout
+   * @return void
+   */
+  public static function logout() {
+    $method = (
+      self :: $logged_method?
+      self :: $logged_method:
+      (isset($_SESSION['auth_method'])?$_SESSION['auth_method']:null)
+    );
+    self :: $user = null;
+    self :: $logged_method = null;
+    if (isset($_SESSION['user']))
+      unset($_SESSION['user']);
+    if (isset($_SESSION['auth_method']))
+      unset($_SESSION['auth_method']);
+    if ($method)
+      call_user_func(array(self :: $methods[$method], 'logout'));
+  }
+
+  /**
+   * Get current authenticated user
+   * @return \EesyPHP\Auth\User|null
+   */
+  public static function user() {
+    return self :: $user;
+  }
+}
diff --git a/src/Auth/Backend.php b/src/Auth/Backend.php
new file mode 100644
index 0000000..217d5ca
--- /dev/null
+++ b/src/Auth/Backend.php
@@ -0,0 +1,33 @@
+<?php
+
+namespace EesyPHP\Auth;
+
+class Backend {
+
+  /**
+   * Initialize
+   * @return boolean
+   */
+  public static function init() {
+    return true;
+  }
+
+  /**
+   * Retreive a user by its username
+   * @param string $username
+   * @return \EesyPHP\Auth\User|null|false The user object if found, null it not, false in case of error
+   */
+  public static function get_user($username) {
+    return null;
+  }
+
+  /**
+   * Check a user password
+   * @param \EesyPHP\Auth\User $user The user object
+   * @param string $password The password to check
+   * @return boolean
+   */
+  public static function check_password($user, $password) {
+    return false;
+  }
+}
diff --git a/src/Auth/Cas.php b/src/Auth/Cas.php
new file mode 100644
index 0000000..993eac3
--- /dev/null
+++ b/src/Auth/Cas.php
@@ -0,0 +1,132 @@
+<?php
+
+namespace EesyPHP\Auth;
+
+use EesyPHP\App;
+use EesyPHP\Auth;
+use EesyPHP\Log;
+use EesyPHP\Url;
+
+use phpCAS;
+
+class Cas extends Method {
+
+  /**
+   * Fake authenticated user login
+   * @var string|null
+   */
+  private static $fake_authenticated_user = null;
+
+  /**
+   * Initialize
+   * @return boolean
+   */
+  public static function init() {
+    self :: $fake_authenticated_user = App :: get(
+      'auth.cas.fake_authenticated_user', null, 'string');
+    if (self :: $fake_authenticated_user) return true;
+
+    if (App::get('auth.cas.debug_log_file'))
+        phpCAS::setDebug(App::get('auth.cas.debug_log_file'));
+
+    if (!App::get('auth.cas.host')) {
+        Log :: error('CAS host not configured. Check your configuration!');
+        return false;
+    }
+
+    $cas_version = App :: get('auth.cas.version', '2.0', 'string');
+    $supported_cas_versions = phpCAS::getSupportedProtocols();
+    if (!array_key_exists($cas_version, $supported_cas_versions)) {
+        Log :: error(
+            'Unsupported CAS version (%s). Check your configuration!',
+            $cas_version
+        );
+        return false;
+    }
+
+    // Init phpCAS client
+    phpCAS::client(
+        $cas_version,
+        App :: get('auth.cas.host'),
+        App :: get('auth.cas.port', 443, 'int'),
+        App :: get('auth.cas.context', '/idp/cas', 'string'),
+        Url :: get_absolute_url("/")
+    );
+    if (App :: get('auth.cas.ca_cert_certificate_path'))
+        phpCAS::setCasServerCACert(App :: get('auth.cas.ca_cert_certificate_path'));
+    else
+        phpCAS::setNoCasServerValidation();
+    Url :: add_url_handler(
+      '#^login/cas_callback$#', array('EesyPHP\\Auth\\Cas', 'handle_cas_callback'), null, false);
+    return true;
+  }
+
+  /**
+   * Compute CAS callback URL
+   * @return string
+   */
+  private static function get_cas_callback_url() {
+    return Url :: get_absolute_url(
+      'login/cas_callback?next='.(
+        isset($_REQUEST['next'])?
+        $_REQUEST['next']:
+        urlencode(Url :: get_current_url())
+      )
+    );
+  }
+
+  /**
+   * Log user
+   * @param bool $force Force user authentication
+   * @return \EesyPHP\Auth\User|null
+   */
+  public static function login($force=false) {
+    if (!phpCAS :: isAuthenticated() && $force) {
+      $_SESSION['cas_callback_url'] = self :: get_cas_callback_url();
+      phpCAS :: setFixedServiceURL($_SESSION['cas_callback_url']);
+      phpCAS :: forceAuthentication();
+    }
+    $user = (
+      phpCAS :: isAuthenticated()?
+      Auth :: get_user(phpCAS :: getUser()):
+      null
+    );
+    if ($force && !$user)
+      Log :: fatal('Fail to authenticate you');
+    return $user;
+  }
+
+  /**
+   * Logout
+   * @return void
+   */
+  public static function logout() {
+    if (App :: get('auth.cas.logout', true, 'bool') && !self :: $fake_authenticated_user) {
+      if (App :: get('auth.cas.logout_url')) {
+        Url :: redirect(App :: get('auth.cas.logout_url'));
+        exit();
+      }
+      phpCAS::logout();
+    }
+    else {
+      session_unset();
+      session_destroy();
+    }
+  }
+
+  /**
+   * The CAS callback view
+   * @param \EesyPHP\UrlRequest $request
+   * @return void
+   */
+  public static function handle_cas_callback($request) {
+    if (isset($_SESSION['cas_callback_url'])) {
+      phpCAS :: setFixedServiceURL($_SESSION['cas_callback_url']);
+      unset($_SESSION['cas_callback_url']);
+    }
+    $user = Auth :: login(false, 'Cas');
+    if ($user)
+      Url :: redirect(isset($_REQUEST['next'])?urldecode($_REQUEST['next']):null);
+    Log :: fatal('No CAS ticket or fail to authenticate you');
+  }
+}
diff --git a/src/Auth/Form.php b/src/Auth/Form.php
new file mode 100644
index 0000000..3f85941
--- /dev/null
+++ b/src/Auth/Form.php
@@ -0,0 +1,76 @@
+<?php
+
+namespace EesyPHP\Auth;
+
+use EesyPHP\App;
+use EesyPHP\Auth;
+use EesyPHP\Hook;
+use EesyPHP\Url;
+use EesyPHP\Tpl;
+
+class Form extends Method {
+
+  /**
+   * Initialize
+   * @return boolean
+   */
+  public static function init() {
+    Url :: add_url_handler('#^login$#', array('EesyPHP\\Auth\\Form', 'handle_login'), null, false);
+    Hook :: register('logged_in', array('\\EesyPHP\\Auth\\Form', 'logged_in_hook'));
+    return true;
+  }
+
+  /**
+   * Log user
+   * @param bool $force Force user authentication
+   * @return \EesyPHP\Auth\User|null
+   */
+  public static function login($force=false) {
+    $user = null;
+    if (isset($_REQUEST['username']) && isset($_REQUEST['password'])) {
+      $user = Auth :: authenticate($_REQUEST['username'], $_REQUEST['password']);
+      if (!$user) Tpl::add_error(_('Invalid username or password.'));
+    }
+    if ($force && !$user) {
+      if (Url :: get_current_url() != 'login')
+        Url :: redirect('login?next='.urlencode(Url :: get_current_url()));
+      return null;
+    }
+    return $user;
+  }
+
+  /**
+   * The login form view
+   * @param \EesyPHP\UrlRequest $request
+   * @return void
+   */
+  public static function handle_login($request) {
+    $user = Auth :: login(false, 'Form');
+    $display_other_methods = array();
+    foreach (App::get('auth.login_form.display_other_methods', array(), 'array') as $method => $label)
+      if (Auth::method_is_enabled($method))
+        $display_other_methods[$method] = $label;
+    if (
+      !$user && isset($_REQUEST['method']) &&
+      array_key_exists($_REQUEST['method'], $display_other_methods)
+    ) {
+      $user = Auth :: login($_REQUEST['method'], $_REQUEST['method']);
+    }
+    if ($user)
+      Url :: redirect(isset($_REQUEST['next'])?urldecode($_REQUEST['next']):null);
+    else
+    Tpl :: assign('next', (isset($_REQUEST['next'])?urldecode($_REQUEST['next']):''));
+    Tpl :: assign('display_other_methods', $display_other_methods);
+    Tpl :: display('login.tpl', 'Connection');
+  }
+
+  /**
+   * Logged in hook
+   * @param \EesyPHP\HookEvent $event
+   * @return void
+   */
+  public static function logged_in_hook($event) {
+    if ($event->method == 'Form' && isset($_REQUEST['next']))
+      Url :: redirect(urldecode($_REQUEST['next']));
+  }
+}
diff --git a/src/Auth/Http.php b/src/Auth/Http.php
new file mode 100644
index 0000000..b0d3808
--- /dev/null
+++ b/src/Auth/Http.php
@@ -0,0 +1,137 @@
+<?php
+
+namespace EesyPHP\Auth;
+
+use EesyPHP\App;
+use EesyPHP\Auth;
+use EesyPHP\I18n;
+use EesyPHP\Log;
+use EesyPHP\Tpl;
+use EesyPHP\Url;
+use function EesyPHP\vardump;
+
+class Http extends Method {
+
+  /**
+   * Method to retreive HTTP credentials
+   * @var string
+   */
+  private static $method;
+
+  /**
+   * HTTP realm string (use to compute WWW-Authenticate HTTP header)
+   * @var string
+   */
+  private static $realm;
+
+  /**
+   * Initialize
+   * @return boolean
+   */
+  public static function init() {
+    self :: $method = App::get('auth.http.method', 'PHP_AUTH', 'string');
+    self :: $realm = App::get(
+      'auth.http.realm', _('Authentication required'), 'string');
+    return true;
+  }
+
+  /**
+   * Retreive HTTP authentication data
+   * @return array|false array('username' => '[login]', 'password' => '[password]') or false
+   */
+  private static function get_auth_data() {
+    switch(self :: $method) {
+        case 'AUTHORIZATION':
+            Log :: debug("Auth HTTP: use AUTHORIZATION method");
+            if (isset($_SERVER['HTTP_AUTHORIZATION']) && !empty($_SERVER['HTTP_AUTHORIZATION'])) {
+                $auth_data = explode(':', base64_decode(substr($_SERVER['HTTP_AUTHORIZATION'], 6)));
+                if (is_array($auth_data) && count($auth_data) == 2) {
+                    return array(
+                        'username' => $auth_data[0],
+                        'password' => $auth_data[1],
+                    );
+                }
+                else
+                    Log :: error("Fail to parse HTTP_AUTHORIZATION environnement variable.");
+            }
+            break;
+        case 'REMOTE_USER':
+            Log :: debug("Auth HTTP : use REMOTE_USER method");
+            if (isset($_SERVER['REMOTE_USER']) && !empty($_SERVER['REMOTE_USER'])) {
+                return array(
+                    'username' => $_SERVER['REMOTE_USER'],
+                    'password' => false,
+                );
+            }
+            break;
+        case 'PHP_AUTH':
+        default:
+            Log :: debug("Auth HTTP : use PHP_AUTH method");
+            if (isset($_SERVER['PHP_AUTH_USER']) && !empty($_SERVER['PHP_AUTH_USER'])) {
+                return array(
+                    'username' => $_SERVER['PHP_AUTH_USER'],
+                    'password' => $_SERVER['PHP_AUTH_PW'],
+                );
+            }
+            break;
+    }
+    Log :: trace("HTTP::get_auth_data(): no auth data found\n".vardump($_SERVER));
+    return false;
+  }
+
+  /**
+   * Log user
+   * @param bool $force Force user authentication
+   * @return \EesyPHP\Auth\User|null
+   */
+  public static function login($force=false) {
+    $auth_data = self :: get_auth_data();
+    if (!$auth_data) {
+      if ($force) self :: force_login();
+      return null;
+    }
+
+    if (App :: get('auth.http.trust_without_password_challenge', false, 'bool'))
+      $user = Auth :: get_user($auth_data['username']);
+    else
+      $user = Auth :: authenticate($auth_data['username'], $auth_data['password']);
+
+    if (!$user && $force)
+      self :: force_login();
+
+    return $user;
+  }
+
+  /**
+   * Force HTTP user authentification
+   * @return void
+   */
+  public static function force_login() {
+    header('HTTP/1.1 401 Authorization Required');
+    header(
+      sprintf('WWW-Authenticate: Basic realm="%s"', addslashes(self :: $realm))
+    );
+    if (Tpl::initialized()) {
+      Tpl :: display("must_login.tpl", I18n::_("Access denied"));
+    }
+    else {
+      printf("<h1>%s</h1>", I18n::_("Access denied"));
+      printf("<p>%s</p>", I18n::_("You must login to access this page."));
+      printf(
+        "<p><a href='%s'>%s</a></p>",
+        Url :: public_root_url(),
+        I18n::_("You must login to access this page.")
+      );
+    }
+    exit();
+  }
+
+  /**
+   * Logout
+   * @return void
+   */
+  public static function logout() {
+    self :: force_login();
+  }
+
+}
diff --git a/src/Auth/Ldap.php b/src/Auth/Ldap.php
new file mode 100644
index 0000000..2480763
--- /dev/null
+++ b/src/Auth/Ldap.php
@@ -0,0 +1,260 @@
+<?php
+
+namespace EesyPHP\Auth;
+
+use EesyPHP\App;
+use EesyPHP\Auth\User;
+use EesyPHP\Config;
+use EesyPHP\Log;
+use function EesyPHP\ensure_is_array;
+use function EesyPHP\cast;
+use function EesyPHP\vardump;
+
+use PEAR;
+use Net_LDAP2;
+use Net_LDAP2_Filter;
+
+class Ldap extends Backend {
+
+  /**
+   * LDAP configuration as expected by Net_LDAP2
+   * @var array
+   */
+  private static $ldap_config;
+
+  /**
+   * Net_LDAP2 connection (if connected)
+   * @var Net_LDAP2|null
+   */
+  private static $connection = null;
+
+  /**
+   * Default LDAP user attributes configuration
+   * @var array<string,array>
+   */
+  private static $default_user_attributes = array(
+    'uid' => array(
+      'name' => 'login',
+      'type' => 'string',
+      'multivalued' => false,
+      'default' => null,
+    ),
+    'mail' => array(
+      'type' => 'string',
+      'multivalued' => false,
+      'default' => null,
+    ),
+    'cn' => array(
+      'name' => 'name',
+      'type' => 'string',
+      'multivalued' => false,
+      'default' => null,
+    ),
+  );
+
+  /**
+   * Initialize
+   * @return bool
+   */
+  public static function init() {
+    if (!class_exists('Net_LDAP2')) {
+      $path = App::get('auth.ldap.netldap2_path', 'Net/LDAP2.php', 'string');
+      if (!@include($path)) {
+        Log::error('Fail to load Net_LDAP2 (%s)', $path);
+        return false;
+      }
+    }
+    foreach(array('host', 'basedn') as $param) {
+      if (!App::get("auth.ldap.$param")) {
+        Log :: error('LDAP %s not configured. Check your configuration!', $param);
+        return false;
+      }
+    }
+
+    self :: $ldap_config = array (
+      'host'  => implode(' ', App :: get('auth.ldap.host', array(), 'array')),
+      'basedn' => App :: get('auth.ldap.basedn', null, 'string'),
+      'binddn' => App :: get('auth.ldap.bind_dn', null, 'string'),
+      'bindpw' => App :: get('auth.ldap.bind_password', null, 'string'),
+      'starttls' => App :: get('starttls', false, 'bool'),
+    );
+    if ($port = App :: get('auth.ldap.port', null, 'int'))
+      self :: $ldap_config['port'] = $port;
+    return true;
+  }
+
+  /**
+   * Connect on the LDAP directory
+   * @return bool
+   */
+  private static function connect() {
+    if (is_a(self :: $connection, 'Net_LDAP2')) return true;
+    Log :: debug(
+      'Connect on LDAP host "%s" as %s (base DN="%s")',
+      self :: $ldap_config['host'],
+      isset(self :: $ldap_config['binddn'])?self :: $ldap_config['binddn']:"anonymous",
+       self :: $ldap_config['basedn']
+    );
+
+    // @phpstan-ignore-next-line
+    self :: $connection = Net_LDAP2::connect(self :: $ldap_config);
+    // @phpstan-ignore-next-line
+    if (PEAR::isError(self :: $connection)) {
+      Log :: error(
+        'Could not connect to LDAP server (%s): %s',
+        self :: $ldap_config['host'], self :: $connection->getMessage());
+      self :: $connection = null;
+      return false;
+    }
+    return true;
+  }
+
+  /**
+   * Make a search in the LDAP directory
+   * @param string $filter The LDAP filter string
+   * @param array|null $attrs Expected attributes (optional, default: all existing attributes)
+   * @param string|null $basedn The base DN of the search (optional, default: configured root base
+   *                            DN of the LDAP connection)
+   * @param string|array<string>|null $sorted If defined, sort return objects by specified attribute(s)
+   * @param array|null $options Search options as expected by NetLDAP::search() (optional, default: null)
+   */
+  public static function search($filter, $attrs=null, $basedn=null, $sorted=null, $options=null) {
+    if (!self :: connect()) return false;
+    $options = is_array($options)?$options:array();
+    if (!is_null($attrs))
+      $options['attributes'] = $attrs;
+
+    Log :: debug(
+      'Run search in LDAP directory with filter "%s" on base DN "%s"',
+      $filter, $basedn?$basedn:"unset");
+    $search = self :: $connection -> search($basedn, $filter, $options);
+
+    // @phpstan-ignore-next-line
+    if (PEAR::isError($search)) {
+      Log :: error(
+        'Error occured searching in LDAP with filter "%s" on base DN "%s": %s',
+        $filter, $basedn?$basedn:"unset", $search->getMessage()
+      );
+      return false;
+    }
+
+    $entries = (
+      $sorted?
+      $search -> sorted(ensure_is_array($sorted)):
+      $search -> entries()
+    );
+
+    $result = array();
+    foreach ($entries as $entry)
+      $result[$entry->dn()] = $entry -> getValues();
+
+    return $result;
+  }
+
+  /**
+   * Cast an LDAP value
+   * @param mixed $value The raw LDAP value
+   * @param string $type The expected type: see cast() for supported types, but boolean value will
+   *                     be casted as LDAP boolean string.
+   * @return mixed The casted value
+   */
+  public static function cast($value, $type) {
+    switch($type) {
+      case 'bool':
+      case 'boolean':
+        return $value == 'TRUE';
+      case 'array_of_bool':
+      case 'array_of_boolean':
+        $values = array();
+        foreach(ensure_is_array($value) as $value)
+          $values[] = $value == 'TRUE';
+        return $values;
+      default:
+        return cast($value, $type);
+    }
+  }
+
+  /**
+   * Retreive LDAP attribute value(s) from LDAP entry
+   * @param array<string,mixed> $entry The LDAP entry
+   * @param string $attr The LDAP attribute name
+   * @param bool $all_values Return all values or just the first one (optional, default: false)
+   * @param mixed $default The default value to return if the LDAP attribute is undefined
+   *                       (optional, default: an empty array if $all_values, null otherwise)
+   * @param string|null $cast The expected type of value (optional, default: string)
+   */
+  public static function get_attr($entry, $attr, $all_values=False, $default=null, $cast=null) {
+    $values = self :: cast(
+      isset($entry[$attr])?ensure_is_array($entry[$attr]):array(),
+      "array_of_".($cast?$cast:'string')
+    );
+    if ($values)
+      return $all_values?$values:$values[0];
+    if ($all_values)
+      return !is_null($default)?$default:array();
+    return $default;
+  }
+
+  /**
+   * Retreive a user by its username
+   * @param string $username
+   * @return \EesyPHP\Auth\User|null|false The user object if found, null it not, false in case of error
+   */
+  public static function get_user($username) {
+    $attrs = App::get('auth.ldap.user_attributes', self :: $default_user_attributes, 'array');
+    $users = self :: search(
+      str_replace(
+        '[username]', Net_LDAP2_Filter::escape($username),
+        App::get('auth.ldap.user_filter_by_uid', 'uid=[username]', 'string')
+      ),
+      array_keys($attrs),
+      App::get('auth.ldap.user_basedn', null, 'string')
+    );
+    if (!is_array($users)) {
+      Log::warning('An error occured looking for user "%s" in LDAP directory', $username);
+      return false;
+    }
+    if (!$users) {
+      Log::debug('User "%s" not found in LDAP directory', $username);
+      return null;
+    }
+    if (count($users) > 1) {
+      Log::warning(
+        'More than on users found with username "%s": %s',
+        $username, implode(' / ', array_keys($users))
+      );
+    }
+    $dn = key($users);
+    $info = array('dn' => $dn);
+    foreach($attrs as $attr => $attr_config) {
+      $info[Config::get("name", $attr, 'string', false, $attr_config)] = self :: get_attr(
+        $users[$dn],
+        $attr,
+        Config::get("multivalued", false, 'bool', false, $attr_config),
+        Config::get("default", null, null, false, $attr_config)
+      );
+    }
+    Log::debug('User "%s" found in LDAP directory (%s):\n%s', $username, $dn, vardump($info));
+    return new User($username, '\\EesyPHP\\Auth\\LDAP', $info);
+  }
+
+  /**
+   * Check a user password
+   * @param \EesyPHP\Auth\User $user The user object
+   * @param string $password The password to check
+   * @return boolean
+   */
+  public static function check_password($user, $password) {
+    $config = self :: $ldap_config;
+    $config['binddn'] = (
+      App::get('auth.ldap.bind_with_username', false, 'bool')?
+      $user->username:
+      $user->dn
+    );
+    $config['bindpw'] = $password;
+    $result = Net_LDAP2::connect($config);
+    // @phpstan-ignore-next-line
+    return !PEAR::isError($result);
+  }
+
+}
diff --git a/src/Auth/Method.php b/src/Auth/Method.php
new file mode 100644
index 0000000..fcda754
--- /dev/null
+++ b/src/Auth/Method.php
@@ -0,0 +1,34 @@
+<?php
+
+namespace EesyPHP\Auth;
+
+use EesyPHP\Log;
+
+class Method {
+
+  /**
+   * Initialize
+   * @return boolean
+   */
+  public static function init() {
+    return true;
+  }
+
+  /**
+   * Log user
+   * @param bool $force Force user authentication
+   * @return \EesyPHP\Auth\User|null
+   */
+  public static function login($force=false) {
+    Log :: fatal('login() is not implement for this authentication method.');
+    return null;
+  }
+
+  /**
+   * Logout
+   * @return void
+   */
+  public static function logout() {
+    return;
+  }
+}
diff --git a/src/Auth/User.php b/src/Auth/User.php
new file mode 100644
index 0000000..d0fd95d
--- /dev/null
+++ b/src/Auth/User.php
@@ -0,0 +1,86 @@
+<?php
+
+namespace EesyPHP\Auth;
+
+use EesyPHP\Log;
+
+class User {
+
+  /**
+   * Username
+   * @var string
+   */
+  private $username;
+
+  /**
+   * User backend class name
+   * @var string
+   */
+  private $backend;
+
+  /**
+   * User info
+   * @var array<string,mixed>
+   */
+  private $info;
+
+  /**
+   * Constructor
+   * @param string $username The username
+   * @param string $backend The backend class name
+   * @param array<string,mixed>|null $info User info (optional)
+   */
+  public function __construct($username, $backend, $info=null) {
+    $this -> username = $username;
+    $this -> backend = $backend;
+    $this -> info = is_array($info)?$info:array();
+  }
+
+  /**
+   * Magic method to get a dynamic property
+   * @param string $key The property
+   * @return mixed
+   */
+  public function __get($key) {
+    switch ($key) {
+      case 'username':
+        return $this -> username;
+      case 'backend':
+        return $this -> backend;
+      default:
+        if (array_key_exists($key, $this -> info))
+          return $this -> info[$key];
+    }
+    Log::warning(
+      'Ask for unknown user property %s:\n%s', $key, Log::get_debug_backtrace_context());
+    return null;
+  }
+
+  /**
+   * Magic method to check if a dynamic property is set
+   * @param string $key The property
+   * @return bool
+   */
+  public function __isset($key) {
+    switch ($key) {
+      case 'username':
+      case 'backend':
+        return true;
+      default:
+        return array_key_exists($key, $this -> info);
+    }
+  }
+
+  /**
+   * Check user password
+   * @param string $password
+   * @return bool
+   */
+  public function check_password($password) {
+    return call_user_func(
+      array($this -> backend, 'check_password'),
+      $this, $password
+    );
+  }
+
+}
diff --git a/src/Log.php b/src/Log.php
index 1bbb911..2ed71a2 100644
--- a/src/Log.php
+++ b/src/Log.php
@@ -132,7 +132,7 @@ class Log {
    * @return true
    */
   public static function log($level, $message, ...$extra_args) {
-    global $auth_user, $argv;
+    global $argv;
 
     if (!array_key_exists($level, self :: $levels)) $level = self :: $default_level;
     if (self :: $levels[$level] < self :: $levels[self :: $level]) return true;
@@ -162,8 +162,8 @@ class Log {
         $_SERVER['REQUEST_URI'],
         $_SERVER['REMOTE_ADDR'],
       );
-      if (isset($auth_user))
-        $msg[] = ($auth_user['username']?$auth_user['username']:'anonymous');
+      if (Auth::enabled())
+        $msg[] = (Auth::user()?Auth::user()->username:'anonymous');
       $msg[] = $level;
       $msg[] = $message;
       $msg = implode(' - ', $msg)."\n";
diff --git a/src/SentryIntegration.php b/src/SentryIntegration.php
index ec0927d..397efe0 100644
--- a/src/SentryIntegration.php
+++ b/src/SentryIntegration.php
@@ -47,11 +47,8 @@ class SentryIntegration {
     ]);
 
     \Sentry\configureScope(function (\Sentry\State\Scope $scope): void {
-        global $auth_user;
         $scope->setUser([
-            'id' => isset($auth_user) && $auth_user?$auth_user['uid']:null,
-            'email' => isset($auth_user) && $auth_user?$auth_user['mail']:null,
-            'segment' => isset($auth_user) && $auth_user?$auth_user['type']:null,
+            'username' => Auth::user()?Auth::user()->username:null,
             'ip_address' => php_sapi_name()=='cli'?null:$_SERVER['REMOTE_ADDR'],
         ]);
     });
diff --git a/src/Tpl.php b/src/Tpl.php
index 9faf952..a0e9e43 100644
--- a/src/Tpl.php
+++ b/src/Tpl.php
@@ -356,7 +356,6 @@ class Tpl {
    * @return void
    */
   protected static function define_common_variables($pagetitle=null) {
-    global $auth_user;
     self :: assign('public_root_url', Url :: public_root_url());
     self :: assign('pagetitle', $pagetitle);
     self :: assign('main_pagetitle', App::get('main_pagetitle', null, 'string'));
@@ -379,8 +378,8 @@ class Tpl {
     self :: assign('TEXT_DOMAIN', I18n :: TEXT_DOMAIN);
 
     // Authenticated user info
-    if (isset($auth_user))
-      self :: assign('auth_user', $auth_user);
+    if (Auth::user())
+      self :: assign('auth_user', Auth::user());
   }
 
   /**
diff --git a/src/Url.php b/src/Url.php
index 971ed25..8a0659f 100644
--- a/src/Url.php
+++ b/src/Url.php
@@ -77,8 +77,8 @@ class Url {
    * @param array|null        $additional_info  Array of information to pass to the URL handler
    * @param boolean           $authenticated    Permit to define if this URL is accessible only for
    *                                            authenticated users (optional, default: true if the
-   *                                            special force_authentication function is defined,
-   *                                            false otherwise)
+   *                                            EesyPHP Authentication feature is enabled, false
+   *                                            otherwise)
    * @param boolean           $overwrite        Allow overwrite if a command already exists with the
    *                                            same name (optional, default: false)
    * @param boolean           $api_mode         Enable API mode (optional, default: false)
@@ -88,12 +88,6 @@ class Url {
   public static function add_url_handler($pattern, $handler=null, $additional_info=null,
                                          $authenticated=null, $overwrite=true, $api_mode=false,
                                          $http_methods=null) {
-    $authenticated = (
-      is_null($authenticated)?
-      function_exists('force_authentication'):
-      (bool)$authenticated
-    );
-
     // Check HTTP methods parameter
     if (is_null($http_methods))
       $http_methods = array('GET', 'POST');
@@ -422,8 +416,7 @@ class Url {
    * Handle the current requested URL
    *
    * Note: if the route required that user is authenticated, this method will
-   * invoke the force_authentication() special function (or trigger a fatal error
-   * if it's not defined).
+   * invoke Auth::login() in force mode (or trigger a fatal error if fail).
    *
    * @param string|null $default_url The default URL if current one does not
    *                                 match with any configured pattern.
@@ -448,11 +441,8 @@ class Url {
       Tpl :: assign('request', $request);
 
     // Check authentication (if need)
-    if($request -> authenticated)
-      if (function_exists('force_authentication'))
-        force_authentication();
-      else
-        Log :: fatal(I18n::_("Authentication required but force_authentication function is not defined."));
+    if($request  -> authenticated && !Auth::login(true))
+      Log :: fatal(I18n::_("Authentication required but fail to authenticate you."));
 
     try {
       call_user_func($request -> handler, $request);
diff --git a/src/UrlRequest.php b/src/UrlRequest.php
index 835c760..f661a8d 100644
--- a/src/UrlRequest.php
+++ b/src/UrlRequest.php
@@ -54,7 +54,7 @@ class UrlRequest {
     $this -> handler = $handler_info['handler'];
     $this -> authenticated = (
       isset($handler_info['authenticated'])?
-      boolval($handler_info['authenticated']):true);
+      $handler_info['authenticated']:null);
     $this -> api_mode = (
       isset($handler_info['api_mode'])?
       boolval($handler_info['api_mode']):false);
@@ -78,7 +78,11 @@ class UrlRequest {
     if ($key == 'handler')
       return $this -> handler;
     if ($key == 'authenticated')
-      return $this -> authenticated;
+      return (
+        is_null($this -> authenticated)?
+        Auth::enabled():
+        (bool)$this -> authenticated
+      );
     if ($key == 'api_mode')
       return $this -> api_mode;
     if ($key == 'referer')
diff --git a/src/functions.php b/src/functions.php
index d1deffd..eee6f66 100644
--- a/src/functions.php
+++ b/src/functions.php
@@ -99,6 +99,13 @@ function ensure_is_array($value) {
  * @return mixed The cast value
  **/
 function cast($value, $type, $split=false) {
+    if (strpos($type, 'array_of_') === 0) {
+      $type = substr($type, 9);
+      $values = array();
+      foreach(ensure_is_array($value) as $key => $value)
+        $values[$key] = cast($value, $type);
+      return $values;
+    }
     switch($type) {
         case 'bool':
         case 'boolean':
diff --git a/templates/empty.tpl b/templates/empty.tpl
index eedaf1a..fb2ea92 100644
--- a/templates/empty.tpl
+++ b/templates/empty.tpl
@@ -53,11 +53,11 @@
       <ul class="navbar-nav ml-md-auto">
         <li class="nav-item dropdown">
           <a class="nav-item nav-link dropdown-toggle mr-md-2" href="#" id="bd-versions" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
-            <i class="fa fa-user" aria-hidden="true"></i> {$auth_user.name|escape:"htmlall"} <span class="caret"></span>
+            <i class="fa fa-user" aria-hidden="true"></i> {$auth_user->name|escape:"htmlall"} <span class="caret"></span>
           </a>
           <div class="dropdown-menu dropdown-menu-right">
             {block name="navbar-user-menu"}{/block}
-            <a class="dropdown-item" href="?logout=1"><i class="fas fa-sign-out-alt"></i> Déconnexion</a>
+            <a class="dropdown-item" href="logout"><i class="fas fa-sign-out-alt"></i> {t domain=$CORE_TEXT_DOMAIN}Logout{/t}</a>
           </div>
         </li>
       </ul>
diff --git a/templates/login.tpl b/templates/login.tpl
new file mode 100644
index 0000000..f8edb2e
--- /dev/null
+++ b/templates/login.tpl
@@ -0,0 +1,22 @@
+{extends file='Tpl:empty.tpl'}
+{block name="pagetitle"}<h2 class="center"><i class="fas fa-sign-in-alt"></i> {t domain=$CORE_TEXT_DOMAIN}Connection{/t}</h2>{/block}
+{block name="content"}
+<form action="login" method="POST">
+  <input type="hidden" name="next" value="{$next|escape:"quotes"}"/>
+  <div class="form-group">
+    <label for="username">{t domain=$CORE_TEXT_DOMAIN}Username{/t}</label>
+    <input type="text" class="form-control" name="username" />
+  </div>
+  <div class="form-group">
+    <label for="password">{t domain=$CORE_TEXT_DOMAIN}Password{/t}</label>
+    <input type="password" class="form-control" name="password">
+  </div>
+  <button type="submit" class="btn btn-primary">{t domain=$CORE_TEXT_DOMAIN}Submit{/t}</button>
+  {foreach $display_other_methods as $method => $name}
+  <a class='btn btn-secondary' href='login?method={$method}&next={$next|escape:"url"}'>{$name}</a>
+  {/foreach}
+</form>
+{/block}
+{*
+# vim: autoindent expandtab tabstop=2 shiftwidth=2 softtabstop=2
+*}
diff --git a/templates/logout.tpl b/templates/logout.tpl
new file mode 100644
index 0000000..eca5cd3
--- /dev/null
+++ b/templates/logout.tpl
@@ -0,0 +1,11 @@
+{extends file='Tpl:empty.tpl'}
+{block name="pagetitle"}{/block}
+{block name="content"}
+<div class="jumbotron">
+  <h1 class="display-4">{t domain=$CORE_TEXT_DOMAIN}Disconnected{/t}</h1>
+  <p class="lead">{t escape=off domain=$CORE_TEXT_DOMAIN}You are now disconnected.{/t}</p>
+</div>
+{/block}
+{*
+# vim: autoindent expandtab tabstop=2 shiftwidth=2 softtabstop=2
+*}
diff --git a/templates/must_login.tpl b/templates/must_login.tpl
new file mode 100644
index 0000000..945f03c
--- /dev/null
+++ b/templates/must_login.tpl
@@ -0,0 +1,11 @@
+{extends file='Tpl:empty.tpl'}
+{block name="pagetitle"}{/block}
+{block name="content"}
+<div class="jumbotron">
+  <h1 class="display-4">{t domain=$CORE_TEXT_DOMAIN}Access denied{/t}</h1>
+  <p class="lead">{t escape=off domain=$CORE_TEXT_DOMAIN}You must login to access this page.{/t}</p>
+</div>
+{/block}
+{*
+# vim: autoindent expandtab tabstop=2 shiftwidth=2 softtabstop=2
+*}