Authentication backends refactoring

17 files changed, 647 insertions, 439 deletions

diff --git a/app/Auth/Base.php b/app/Auth/Base.php
new file mode 100644
index 00000000..f9c1c329
--- /dev/null
+++ b/app/Auth/Base.php
@@ -0,0 +1,60 @@
+<?php
+
+namespace Auth;
+
+use Core\Tool;
+use Core\Registry;
+use PicoDb\Database;
+
+/**
+ * Base auth class
+ *
+ * @package  auth
+ * @author   Frederic Guillot
+ *
+ * @property \Model\Acl                $acl
+ * @property \Model\LastLogin          $lastLogin
+ * @property \Model\User               $user
+ */
+abstract class Base
+{
+    /**
+     * Database instance
+     *
+     * @access protected
+     * @var \PicoDb\Database
+     */
+    protected $db;
+
+    /**
+     * Registry instance
+     *
+     * @access protected
+     * @var \Core\Registry
+     */
+    protected $registry;
+
+    /**
+     * Constructor
+     *
+     * @access public
+     * @param  \Core\Registry  $registry  Registry instance
+     */
+    public function __construct(Registry $registry)
+    {
+        $this->registry = $registry;
+        $this->db = $this->registry->shared('db');
+    }
+
+    /**
+     * Load automatically models
+     *
+     * @access public
+     * @param  string $name Model name
+     * @return mixed
+     */
+    public function __get($name)
+    {
+        return Tool::loadModel($this->registry, $name);
+    }
+}
diff --git a/app/Auth/Database.php b/app/Auth/Database.php
new file mode 100644
index 00000000..67881593
--- /dev/null
+++ b/app/Auth/Database.php
@@ -0,0 +1,52 @@
+<?php
+
+namespace Auth;
+
+use Model\User;
+
+/**
+ * Database authentication
+ *
+ * @package  auth
+ * @author   Frederic Guillot
+ */
+class Database extends Base
+{
+    /**
+     * Backend name
+     *
+     * @var string
+     */
+    const AUTH_NAME = 'Database';
+
+    /**
+     * Authenticate a user
+     *
+     * @access public
+     * @param  string  $username  Username
+     * @param  string  $password  Password
+     * @return boolean
+     */
+    public function authenticate($username, $password)
+    {
+        $user = $this->db->table(User::TABLE)->eq('username', $username)->eq('is_ldap_user', 0)->findOne();
+
+        if ($user && password_verify($password, $user['password'])) {
+
+            // Update user session
+            $this->user->updateSession($user);
+
+            // Update login history
+            $this->lastLogin->create(
+                self::AUTH_NAME,
+                $user['id'],
+                $this->user->getIpAddress(),
+                $this->user->getUserAgent()
+            );
+
+            return true;
+        }
+
+        return false;
+    }
+}
diff --git a/app/Model/GitHub.php b/app/Auth/GitHub.php
index bf4f4c51..1e99df41 100644
--- a/app/Model/GitHub.php
+++ b/app/Auth/GitHub.php
@@ -1,171 +1,178 @@
-<?php

-

-namespace Model;

-

-require __DIR__.'/../../vendor/OAuth/bootstrap.php';

-

-use OAuth\Common\Storage\Session;

-use OAuth\Common\Consumer\Credentials;

-use OAuth\Common\Http\Uri\UriFactory;

-use OAuth\ServiceFactory;

-use OAuth\Common\Http\Exception\TokenResponseException;

-

-/**

- * GitHub model

- *

- * @package  model

- */

-class GitHub extends Base

-{

-    /**

-     * Authenticate a GitHub user

-     *

-     * @access public

-     * @param  string  $github_id   GitHub user id

-     * @return boolean

-     */

-    public function authenticate($github_id)

-    {

-        $user = $this->user->getByGitHubId($github_id);

-

-        if ($user) {

-

-            // Create the user session

-            $this->user->updateSession($user);

-

-            // Update login history

-            $this->lastLogin->create(

-                LastLogin::AUTH_GITHUB,

-                $user['id'],

-                $this->user->getIpAddress(),

-                $this->user->getUserAgent()

-            );

-

-            return true;

-        }

-

-        return false;

-    }

-

-    /**

-     * Unlink a GitHub account for a given user

-     *

-     * @access public

-     * @param  integer   $user_id    User id

-     * @return boolean

-     */

-    public function unlink($user_id)

-    {

-        return $this->user->update(array(

-            'id' => $user_id,

-            'github_id' => '',

-        ));

-    }

-

-    /**

-     * Update the user table based on the GitHub profile information

-     *

-     * @access public

-     * @param  integer   $user_id    User id

-     * @param  array     $profile    GitHub profile

-     * @return boolean

-     * @todo Don't overwrite existing email/name with empty GitHub data

-     */

-    public function updateUser($user_id, array $profile)

-    {

-        return $this->user->update(array(

-            'id' => $user_id,

-            'github_id' => $profile['id'],

-            'email' => $profile['email'],

-            'name' => $profile['name'],

-        ));

-    }

-

-    /**

-     * Get the GitHub service instance

-     *

-     * @access public

-     * @return \OAuth\OAuth2\Service\GitHub

-     */

-    public function getService()

-    {

-        $uriFactory = new UriFactory();

-        $currentUri = $uriFactory->createFromSuperGlobalArray($_SERVER);

-        $currentUri->setQuery('controller=user&action=gitHub');

-

-        $storage = new Session(false);

-

-        $credentials = new Credentials(

-            GITHUB_CLIENT_ID,

-            GITHUB_CLIENT_SECRET,

-            $currentUri->getAbsoluteUri()

-        );

-

-        $serviceFactory = new ServiceFactory();

-

-        return $serviceFactory->createService(

-            'gitHub',

-            $credentials,

-            $storage,

-            array('')

-        );

-    }

-

-    /**

-     * Get the authorization URL

-     *

-     * @access public

-     * @return \OAuth\Common\Http\Uri\Uri

-     */

-    public function getAuthorizationUrl()

-    {

-        return $this->getService()->getAuthorizationUri();

-    }

-

-    /**

-     * Get GitHub profile information from the API

-     *

-     * @access public

-     * @param  string    $code   GitHub authorization code

-     * @return bool|array

-     */

-    public function getGitHubProfile($code)

-    {

-        try {

-            $gitHubService = $this->getService();

-            $gitHubService->requestAccessToken($code);

-

-            return json_decode($gitHubService->request('user'), true);

-        }

-        catch (TokenResponseException $e) {

-            return false;

-        }

-

-        return false;

-    }

-

-    /**

-     * Revokes this user's GitHub tokens for Kanboard

-     *

-     * @access public

-     * @return bool|array

-     * @todo Currently this simply removes all our tokens for this user, ideally it should

-     *       restrict itself to the one in question

-     */

-    public function revokeGitHubAccess()

-    {

-        try {

-            $gitHubService = $this->getService();

-

-            $basicAuthHeader = array('Authorization' => 'Basic ' .

-            base64_encode(GITHUB_CLIENT_ID.':'.GITHUB_CLIENT_SECRET));

-

-            return json_decode($gitHubService->request('/applications/'.GITHUB_CLIENT_ID.'/tokens', 'DELETE', null, $basicAuthHeader), true);

-        }

-        catch (TokenResponseException $e) {

-            return false;

-        }

-

-        return false;

-    }

-}

+<?php
+
+namespace Auth;
+
+require __DIR__.'/../../vendor/OAuth/bootstrap.php';
+
+use OAuth\Common\Storage\Session;
+use OAuth\Common\Consumer\Credentials;
+use OAuth\Common\Http\Uri\UriFactory;
+use OAuth\ServiceFactory;
+use OAuth\Common\Http\Exception\TokenResponseException;
+
+/**
+ * GitHub backend
+ *
+ * @package auth
+ */
+class GitHub extends Base
+{
+    /**
+     * Backend name
+     *
+     * @var string
+     */
+    const AUTH_NAME = 'Github';
+
+    /**
+     * Authenticate a GitHub user
+     *
+     * @access public
+     * @param  string  $github_id   GitHub user id
+     * @return boolean
+     */
+    public function authenticate($github_id)
+    {
+        $user = $this->user->getByGitHubId($github_id);
+
+        if ($user) {
+
+            // Create the user session
+            $this->user->updateSession($user);
+
+            // Update login history
+            $this->lastLogin->create(
+                self::AUTH_NAME,
+                $user['id'],
+                $this->user->getIpAddress(),
+                $this->user->getUserAgent()
+            );
+
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * Unlink a GitHub account for a given user
+     *
+     * @access public
+     * @param  integer   $user_id    User id
+     * @return boolean
+     */
+    public function unlink($user_id)
+    {
+        return $this->user->update(array(
+            'id' => $user_id,
+            'github_id' => '',
+        ));
+    }
+
+    /**
+     * Update the user table based on the GitHub profile information
+     *
+     * @access public
+     * @param  integer   $user_id    User id
+     * @param  array     $profile    GitHub profile
+     * @return boolean
+     * @todo Don't overwrite existing email/name with empty GitHub data
+     */
+    public function updateUser($user_id, array $profile)
+    {
+        return $this->user->update(array(
+            'id' => $user_id,
+            'github_id' => $profile['id'],
+            'email' => $profile['email'],
+            'name' => $profile['name'],
+        ));
+    }
+
+    /**
+     * Get the GitHub service instance
+     *
+     * @access public
+     * @return \OAuth\OAuth2\Service\GitHub
+     */
+    public function getService()
+    {
+        $uriFactory = new UriFactory();
+        $currentUri = $uriFactory->createFromSuperGlobalArray($_SERVER);
+        $currentUri->setQuery('controller=user&action=gitHub');
+
+        $storage = new Session(false);
+
+        $credentials = new Credentials(
+            GITHUB_CLIENT_ID,
+            GITHUB_CLIENT_SECRET,
+            $currentUri->getAbsoluteUri()
+        );
+
+        $serviceFactory = new ServiceFactory();
+
+        return $serviceFactory->createService(
+            'gitHub',
+            $credentials,
+            $storage,
+            array('')
+        );
+    }
+
+    /**
+     * Get the authorization URL
+     *
+     * @access public
+     * @return \OAuth\Common\Http\Uri\Uri
+     */
+    public function getAuthorizationUrl()
+    {
+        return $this->getService()->getAuthorizationUri();
+    }
+
+    /**
+     * Get GitHub profile information from the API
+     *
+     * @access public
+     * @param  string    $code   GitHub authorization code
+     * @return bool|array
+     */
+    public function getGitHubProfile($code)
+    {
+        try {
+            $gitHubService = $this->getService();
+            $gitHubService->requestAccessToken($code);
+
+            return json_decode($gitHubService->request('user'), true);
+        }
+        catch (TokenResponseException $e) {
+            return false;
+        }
+
+        return false;
+    }
+
+    /**
+     * Revokes this user's GitHub tokens for Kanboard
+     *
+     * @access public
+     * @return bool|array
+     * @todo Currently this simply removes all our tokens for this user, ideally it should
+     *       restrict itself to the one in question
+     */
+    public function revokeGitHubAccess()
+    {
+        try {
+            $gitHubService = $this->getService();
+
+            $basicAuthHeader = array('Authorization' => 'Basic ' .
+            base64_encode(GITHUB_CLIENT_ID.':'.GITHUB_CLIENT_SECRET));
+
+            return json_decode($gitHubService->request('/applications/'.GITHUB_CLIENT_ID.'/tokens', 'DELETE', null, $basicAuthHeader), true);
+        }
+        catch (TokenResponseException $e) {
+            return false;
+        }
+
+        return false;
+    }
+}
diff --git a/app/Model/Google.php b/app/Auth/Google.php
index cca4f668..3dca96be 100644
--- a/app/Model/Google.php
+++ b/app/Auth/Google.php
@@ -1,6 +1,6 @@
 <?php
 
-namespace Model;
+namespace Auth;
 
 require __DIR__.'/../../vendor/OAuth/bootstrap.php';
 
@@ -11,14 +11,21 @@ use OAuth\ServiceFactory;
 use OAuth\Common\Http\Exception\TokenResponseException;
 
 /**
- * Google model
+ * Google backend
  *
- * @package  model
+ * @package  auth
  * @author   Frederic Guillot
  */
 class Google extends Base
 {
     /**
+     * Backend name
+     *
+     * @var string
+     */
+    const AUTH_NAME = 'Google';
+
+    /**
      * Authenticate a Google user
      *
      * @access public
@@ -36,7 +43,7 @@ class Google extends Base
 
             // Update login history
             $this->lastLogin->create(
-                LastLogin::AUTH_GOOGLE,
+                self::AUTH_NAME,
                 $user['id'],
                 $this->user->getIpAddress(),
                 $this->user->getUserAgent()
diff --git a/app/Auth/Ldap.php b/app/Auth/Ldap.php
new file mode 100644
index 00000000..bb17653d
--- /dev/null
+++ b/app/Auth/Ldap.php
@@ -0,0 +1,150 @@
+<?php
+
+namespace Auth;
+
+/**
+ * LDAP model
+ *
+ * @package  auth
+ * @author   Frederic Guillot
+ */
+class Ldap extends Base
+{
+    /**
+     * Backend name
+     *
+     * @var string
+     */
+    const AUTH_NAME = 'LDAP';
+
+    /**
+     * Authenticate the user
+     *
+     * @access public
+     * @param  string  $username  Username
+     * @param  string  $password  Password
+     * @return boolean
+     */
+    public function authenticate($username, $password)
+    {
+        $result = $this->findUser($username, $password);
+
+        if (is_array($result)) {
+
+            $user = $this->user->getByUsername($username);
+
+            if ($user) {
+
+                // There is already a local user with that name
+                if ($user['is_ldap_user'] == 0) {
+                    return false;
+                }
+            }
+            else {
+
+                // We create automatically a new user
+                if ($this->createUser($username, $result['name'], $result['email'])) {
+                    $user = $this->user->getByUsername($username);
+                }
+                else {
+                    return false;
+                }
+            }
+
+            // We open the session
+            $this->user->updateSession($user);
+
+            // Update login history
+            $this->lastLogin->create(
+                self::AUTH_NAME,
+                $user['id'],
+                $this->user->getIpAddress(),
+                $this->user->getUserAgent()
+            );
+
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * Find the user from the LDAP server
+     *
+     * @access public
+     * @param  string  $username  Username
+     * @param  string  $password  Password
+     * @return boolean|array
+     */
+    public function findUser($username, $password)
+    {
+        if (! function_exists('ldap_connect')) {
+            die('The PHP LDAP extension is required');
+        }
+
+        // Skip SSL certificate verification
+        if (! LDAP_SSL_VERIFY) {
+            putenv('LDAPTLS_REQCERT=never');
+        }
+
+        $ldap = ldap_connect(LDAP_SERVER, LDAP_PORT);
+
+        if (! is_resource($ldap)) {
+            die('Unable to connect to the LDAP server: "'.LDAP_SERVER.'"');
+        }
+
+        ldap_set_option($ldap, LDAP_OPT_PROTOCOL_VERSION, 3);
+        ldap_set_option($ldap, LDAP_OPT_REFERRALS, 0);
+
+        if (! @ldap_bind($ldap, LDAP_USERNAME, LDAP_PASSWORD)) {
+            die('Unable to bind to the LDAP server: "'.LDAP_SERVER.'"');
+        }
+
+        $sr = @ldap_search($ldap, LDAP_ACCOUNT_BASE, sprintf(LDAP_USER_PATTERN, $username), array(LDAP_ACCOUNT_FULLNAME, LDAP_ACCOUNT_EMAIL));
+
+        if ($sr === false) {
+            return false;
+        }
+
+        $info = ldap_get_entries($ldap, $sr);
+
+        // User not found
+        if (count($info) == 0 || $info['count'] == 0) {
+            return false;
+        }
+
+        // We got our user
+        if (@ldap_bind($ldap, $info[0]['dn'], $password)) {
+
+            return array(
+                'username' => $username,
+                'name' => isset($info[0][LDAP_ACCOUNT_FULLNAME][0]) ? $info[0][LDAP_ACCOUNT_FULLNAME][0] : '',
+                'email' => isset($info[0][LDAP_ACCOUNT_EMAIL][0]) ? $info[0][LDAP_ACCOUNT_EMAIL][0] : '',
+            );
+        }
+
+        return false;
+    }
+
+    /**
+     * Create a new local user after the LDAP authentication
+     *
+     * @access public
+     * @param  string  $username    Username
+     * @param  string  $name        Name of the user
+     * @param  string  $email       Email address
+     * @return bool
+     */
+    public function createUser($username, $name, $email)
+    {
+        $values = array(
+            'username' => $username,
+            'name' => $name,
+            'email' => $email,
+            'is_admin' => 0,
+            'is_ldap_user' => 1,
+        );
+
+        return $this->user->create($values);
+    }
+}
diff --git a/app/Model/RememberMe.php b/app/Auth/RememberMe.php
index e23ed887..3cf6fc86 100644
--- a/app/Model/RememberMe.php
+++ b/app/Auth/RememberMe.php
@@ -1,18 +1,25 @@
 <?php
 
-namespace Model;
+namespace Auth;
 
 use Core\Security;
 
 /**
  * RememberMe model
  *
- * @package  model
+ * @package  auth
  * @author   Frederic Guillot
  */
 class RememberMe extends Base
 {
     /**
+     * Backend name
+     *
+     * @var string
+     */
+    const AUTH_NAME = 'RememberMe';
+
+    /**
      * SQL table name
      *
      * @var string
@@ -95,6 +102,14 @@ class RememberMe extends Base
                 $this->user->updateSession($this->user->getById($record['user_id']));
                 $this->acl->isRememberMe(true);
 
+                // Update last login infos
+                $this->lastLogin->create(
+                    self::AUTH_NAME,
+                    $this->acl->getUserId(),
+                    $this->user->getIpAddress(),
+                    $this->user->getUserAgent()
+                );
+
                 return true;
             }
         }
diff --git a/app/Model/ReverseProxyAuth.php b/app/Auth/ReverseProxy.php
index 14d18ba3..e23ee24f 100644
--- a/app/Model/ReverseProxyAuth.php
+++ b/app/Auth/ReverseProxy.php
@@ -1,18 +1,25 @@
 <?php
 
-namespace Model;
+namespace Auth;
 
 use Core\Security;
 
 /**
- * ReverseProxyAuth model
+ * ReverseProxy backend
  *
- * @package  model
+ * @package  auth
  * @author   Sylvain Veyrié
  */
-class ReverseProxyAuth extends Base
+class ReverseProxy extends Base
 {
     /**
+     * Backend name
+     *
+     * @var string
+     */
+    const AUTH_NAME = 'ReverseProxy';
+
+    /**
      * Authenticate the user with the HTTP header
      *
      * @access public
@@ -35,7 +42,7 @@ class ReverseProxyAuth extends Base
 
             // Update login history
             $this->lastLogin->create(
-                LastLogin::AUTH_REVERSE_PROXY,
+                self::AUTH_NAME,
                 $user['id'],
                 $this->user->getIpAddress(),
                 $this->user->getUserAgent()
diff --git a/app/Controller/Base.php b/app/Controller/Base.php
index 11841e09..ed8a6b3b 100644
--- a/app/Controller/Base.php
+++ b/app/Controller/Base.php
@@ -15,20 +15,16 @@ use Model\LastLogin;
  * @author   Frederic Guillot
  *
  * @property \Model\Acl                $acl
+ * @property \Model\Authentication     $authentication
  * @property \Model\Action             $action
  * @property \Model\Board              $board
  * @property \Model\Category           $category
  * @property \Model\Comment            $comment
  * @property \Model\Config             $config
  * @property \Model\File               $file
- * @property \Model\Google             $google
- * @property \Model\GitHub             $gitHub
  * @property \Model\LastLogin          $lastLogin
- * @property \Model\Ldap               $ldap
  * @property \Model\Notification       $notification
  * @property \Model\Project            $project
- * @property \Model\RememberMe         $rememberMe
- * @property \Model\ReverseProxyAuth   $reverseProxyAuth
  * @property \Model\SubTask            $subTask
  * @property \Model\Task               $task
  * @property \Model\User               $user
@@ -123,29 +119,8 @@ abstract class Base
         date_default_timezone_set($this->config->get('timezone', 'UTC'));
 
         // Authentication
-        if (! $this->acl->isLogged() && ! $this->acl->isPublicAction($controller, $action)) {
-
-            // Try the "remember me" authentication first
-            if (! $this->rememberMe->authenticate()) {
-
-                // Automatic reverse proxy header authentication
-                if(! (REVERSE_PROXY_AUTH && $this->reverseProxyAuth->authenticate()) ) {
-                    // Redirect to the login form if not authenticated
-                    $this->response->redirect('?controller=user&action=login');
-                }
-            }
-            else {
-
-                $this->lastLogin->create(
-                    LastLogin::AUTH_REMEMBER_ME,
-                    $this->acl->getUserId(),
-                    $this->user->getIpAddress(),
-                    $this->user->getUserAgent()
-                );
-            }
-        }
-        else if ($this->rememberMe->hasCookie()) {
-            $this->rememberMe->refresh();
+        if (! $this->authentication->isAuthenticated($controller, $action)) {
+            $this->response->redirect('?controller=user&action=login');
         }
 
         // Check if the user is allowed to see this page
diff --git a/app/Controller/Config.php b/app/Controller/Config.php
index 498f3214..48bfb9cf 100644
--- a/app/Controller/Config.php
+++ b/app/Controller/Config.php
@@ -28,7 +28,7 @@ class Config extends Base
             'menu' => 'config',
             'title' => t('Settings'),
             'timezones' => $this->config->getTimezones(),
-            'remember_me_sessions' => $this->rememberMe->getAll($this->acl->getUserId()),
+            'remember_me_sessions' => $this->authentication->backend('rememberMe')->getAll($this->acl->getUserId()),
             'last_logins' => $this->lastLogin->getAll($this->acl->getUserId()),
         )));
     }
@@ -73,7 +73,7 @@ class Config extends Base
             'menu' => 'config',
             'title' => t('Settings'),
             'timezones' => $this->config->getTimezones(),
-            'remember_me_sessions' => $this->rememberMe->getAll($this->acl->getUserId()),
+            'remember_me_sessions' => $this->authentication->backend('rememberMe')->getAll($this->acl->getUserId()),
             'last_logins' => $this->lastLogin->getAll($this->acl->getUserId()),
         )));
     }
@@ -124,7 +124,7 @@ class Config extends Base
     public function removeRememberMeToken()
     {
         $this->checkCSRFParam();
-        $this->rememberMe->remove($this->request->getIntegerParam('id'));
+        $this->authentication->backend('rememberMe')->remove($this->request->getIntegerParam('id'));
         $this->response->redirect('?controller=config&action=index#remember-me');
     }
 }
diff --git a/app/Controller/User.php b/app/Controller/User.php
index d30c6fd2..0bb7aec1 100644
--- a/app/Controller/User.php
+++ b/app/Controller/User.php
@@ -18,7 +18,7 @@ class User extends Base
     public function logout()
     {
         $this->checkCSRFParam();
-        $this->rememberMe->destroy($this->acl->getUserId());
+        $this->authentication->backend('rememberMe')->destroy($this->acl->getUserId());
         $this->session->close();
         $this->response->redirect('?controller=user&action=login');
     }
@@ -30,7 +30,7 @@ class User extends Base
      */
     public function login()
     {
-        if (isset($_SESSION['user'])) {
+        if ($this->acl->isLogged()) {
             $this->response->redirect('?controller=app');
         }
 
@@ -50,7 +50,7 @@ class User extends Base
     public function check()
     {
         $values = $this->request->getValues();
-        list($valid, $errors) = $this->user->validateLogin($values);
+        list($valid, $errors) = $this->authentication->validateForm($values);
 
         if ($valid) {
             $this->response->redirect('?controller=app');
@@ -249,14 +249,14 @@ class User extends Base
 
         if ($code) {
 
-            $profile = $this->google->getGoogleProfile($code);
+            $profile = $this->authentication->backend('google')->getGoogleProfile($code);
 
             if (is_array($profile)) {
 
                 // If the user is already logged, link the account otherwise authenticate
                 if ($this->acl->isLogged()) {
 
-                    if ($this->google->updateUser($this->acl->getUserId(), $profile)) {
+                    if ($this->authentication->backend('google')->updateUser($this->acl->getUserId(), $profile)) {
                         $this->session->flash(t('Your Google Account is linked to your profile successfully.'));
                     }
                     else {
@@ -265,7 +265,7 @@ class User extends Base
 
                     $this->response->redirect('?controller=user');
                 }
-                else if ($this->google->authenticate($profile['id'])) {
+                else if ($this->authentication->backend('google')->authenticate($profile['id'])) {
                     $this->response->redirect('?controller=app');
                 }
                 else {
@@ -279,7 +279,7 @@ class User extends Base
             }
         }
 
-        $this->response->redirect($this->google->getAuthorizationUrl());
+        $this->response->redirect($this->authentication->backend('google')->getAuthorizationUrl());
     }
 
     /**
@@ -290,7 +290,7 @@ class User extends Base
     public function unlinkGoogle()
     {
         $this->checkCSRFParam();
-        if ($this->google->unlink($this->acl->getUserId())) {
+        if ($this->authentication->backend('google')->unlink($this->acl->getUserId())) {
             $this->session->flash(t('Your Google Account is not linked anymore to your profile.'));
         }
         else {
@@ -310,14 +310,14 @@ class User extends Base
         $code = $this->request->getStringParam('code');
 
         if ($code) {
-            $profile = $this->gitHub->getGitHubProfile($code);
+            $profile = $this->authentication->backend('gitHub')->getGitHubProfile($code);
 
             if (is_array($profile)) {
 
                 // If the user is already logged, link the account otherwise authenticate
                 if ($this->acl->isLogged()) {
 
-                    if ($this->gitHub->updateUser($this->acl->getUserId(), $profile)) {
+                    if ($this->authentication->backend('gitHub')->updateUser($this->acl->getUserId(), $profile)) {
                         $this->session->flash(t('Your GitHub account was successfully linked to your profile.'));
                     }
                     else {
@@ -326,7 +326,7 @@ class User extends Base
 
                     $this->response->redirect('?controller=user');
                 }
-                else if ($this->gitHub->authenticate($profile['id'])) {
+                else if ($this->authentication->backend('gitHub')->authenticate($profile['id'])) {
                     $this->response->redirect('?controller=app');
                 }
                 else {
@@ -340,7 +340,7 @@ class User extends Base
             }
         }
 
-        $this->response->redirect($this->gitHub->getAuthorizationUrl());
+        $this->response->redirect($this->authentication->backend('gitHub')->getAuthorizationUrl());
     }
 
     /**
@@ -352,9 +352,9 @@ class User extends Base
     {
         $this->checkCSRFParam();
 
-        $this->gitHub->revokeGitHubAccess();
+        $this->authentication->backend('gitHub')->revokeGitHubAccess();
 
-        if ($this->gitHub->unlink($this->acl->getUserId())) {
+        if ($this->authentication->backend('gitHub')->unlink($this->acl->getUserId())) {
             $this->session->flash(t('Your GitHub account is no longer linked to your profile.'));
         }
         else {
diff --git a/app/Core/Tool.php b/app/Core/Tool.php
index 1a2e9904..85b684e2 100644
--- a/app/Core/Tool.php
+++ b/app/Core/Tool.php
@@ -34,8 +34,11 @@ class Tool
 
     public static function loadModel(Registry $registry, $name)
     {
-        $class = '\Model\\'.ucfirst($name);
-        $registry->$name = new $class($registry);
+        if (! isset($registry->$name)) {
+            $class = '\Model\\'.ucfirst($name);
+            $registry->$name = new $class($registry);
+        }
+
         return $registry->shared($name);
     }
 }
diff --git a/app/Model/Authentication.php b/app/Model/Authentication.php
new file mode 100644
index 00000000..4c8aad82
--- /dev/null
+++ b/app/Model/Authentication.php
@@ -0,0 +1,125 @@
+<?php
+
+namespace Model;
+
+use Auth\Database;
+use SimpleValidator\Validator;
+use SimpleValidator\Validators;
+
+/**
+ * Authentication model
+ *
+ * @package  model
+ * @author   Frederic Guillot
+ */
+class Authentication extends Base
+{
+    /**
+     * Load automatically an authentication backend
+     *
+     * @access public
+     * @param  string   $name    Backend class name
+     * @return mixed
+     */
+    public function backend($name)
+    {
+        if (! isset($this->registry->$name)) {
+            $class = '\Auth\\'.ucfirst($name);
+            $this->registry->$name = new $class($this->registry);
+        }
+
+        return $this->registry->shared($name);
+    }
+
+    /**
+     * Check if the current user is authenticated
+     *
+     * @access public
+     * @param  string    $controller    Controller
+     * @param  string    $action        Action name
+     * @return bool
+     */
+    public function isAuthenticated($controller, $action)
+    {
+        // If the action is public we don't need to do any checks
+        if ($this->acl->isPublicAction($controller, $action)) {
+            return true;
+        }
+
+        // If the user is already logged it's ok
+        if ($this->acl->isLogged()) {
+
+            // We update each time the RememberMe cookie tokens
+            if ($this->backend('rememberMe')->hasCookie()) {
+                $this->backend('rememberMe')->refresh();
+            }
+
+            return true;
+        }
+
+        // We try first with the RememberMe cookie
+        if ($this->backend('rememberMe')->authenticate()) {
+            return true;
+        }
+
+        // Then with the ReverseProxy authentication
+        if (REVERSE_PROXY_AUTH && $this->backend('reverseProxy')->authenticate()) {
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * Validate user login form
+     *
+     * @access public
+     * @param  array   $values           Form values
+     * @return array   $valid, $errors   [0] = Success or not, [1] = List of errors
+     */
+    public function validateForm(array $values)
+    {
+        $v = new Validator($values, array(
+            new Validators\Required('username', t('The username is required')),
+            new Validators\MaxLength('username', t('The maximum length is %d characters', 50), 50),
+            new Validators\Required('password', t('The password is required')),
+        ));
+
+        $result = $v->execute();
+        $errors = $v->getErrors();
+
+        if ($result) {
+
+            $authenticated = false;
+
+            // Try first the database auth and then LDAP if activated
+            if ($this->backend('database')->authenticate($values['username'], $values['password'])) {
+                $authenticated = true;
+            }
+            else if (LDAP_AUTH && $this->backend('ldap')->authenticate($values['username'], $values['password'])) {
+                $authenticated = true;
+            }
+
+            if ($authenticated) {
+
+                // Setup the remember me feature
+                if (! empty($values['remember_me'])) {
+
+                    $credentials = $this->backend('rememberMe')
+                                        ->create($this->acl->getUserId(), $this->user->getIpAddress(), $this->user->getUserAgent());
+
+                    $this->backend('rememberMe')->writeCookie($credentials['token'], $credentials['sequence'], $credentials['expiration']);
+                }
+            }
+            else {
+                $result = false;
+                $errors['login'] = t('Bad username or password');
+            }
+        }
+
+        return array(
+            $result,
+            $errors
+        );
+    }
+}
diff --git a/app/Model/Base.php b/app/Model/Base.php
index 92578ffc..1439a36e 100644
--- a/app/Model/Base.php
+++ b/app/Model/Base.php
@@ -2,20 +2,6 @@
 
 namespace Model;
 
-require __DIR__.'/../../vendor/SimpleValidator/Validator.php';
-require __DIR__.'/../../vendor/SimpleValidator/Base.php';
-require __DIR__.'/../../vendor/SimpleValidator/Validators/Required.php';
-require __DIR__.'/../../vendor/SimpleValidator/Validators/Unique.php';
-require __DIR__.'/../../vendor/SimpleValidator/Validators/MaxLength.php';
-require __DIR__.'/../../vendor/SimpleValidator/Validators/MinLength.php';
-require __DIR__.'/../../vendor/SimpleValidator/Validators/Integer.php';
-require __DIR__.'/../../vendor/SimpleValidator/Validators/Equals.php';
-require __DIR__.'/../../vendor/SimpleValidator/Validators/AlphaNumeric.php';
-require __DIR__.'/../../vendor/SimpleValidator/Validators/GreaterThan.php';
-require __DIR__.'/../../vendor/SimpleValidator/Validators/Date.php';
-require __DIR__.'/../../vendor/SimpleValidator/Validators/Email.php';
-require __DIR__.'/../../vendor/SimpleValidator/Validators/Numeric.php';
-
 use Core\Event;
 use Core\Tool;
 use Core\Registry;
@@ -35,7 +21,6 @@ use PicoDb\Database;
  * @property \Model\Config             $config
  * @property \Model\File               $file
  * @property \Model\LastLogin          $lastLogin
- * @property \Model\Ldap               $ldap
  * @property \Model\Notification       $notification
  * @property \Model\Project            $project
  * @property \Model\SubTask            $subTask
diff --git a/app/Model/LastLogin.php b/app/Model/LastLogin.php
index e2ea63e1..3391db50 100644
--- a/app/Model/LastLogin.php
+++ b/app/Model/LastLogin.php
@@ -25,18 +25,6 @@ class LastLogin extends Base
     const NB_LOGINS = 10;
 
     /**
-     * Authentication methods
-     *
-     * @var string
-     */
-    const AUTH_DATABASE    = 'database';
-    const AUTH_REMEMBER_ME = 'remember_me';
-    const AUTH_LDAP        = 'ldap';
-    const AUTH_GOOGLE      = 'google';
-    const AUTH_GITHUB      = 'github';
-    const AUTH_REVERSE_PROXY = 'reverse_proxy';
-
-    /**
      * Create a new record
      *
      * @access public
diff --git a/app/Model/Ldap.php b/app/Model/Ldap.php
deleted file mode 100644
index 007f7171..00000000
--- a/app/Model/Ldap.php
+++ /dev/null
@@ -1,104 +0,0 @@
-<?php
-
-namespace Model;
-
-/**
- * LDAP model
- *
- * @package  model
- * @author   Frederic Guillot
- */
-class Ldap extends Base
-{
-    /**
-     * Authenticate a user
-     *
-     * @access public
-     * @param  string  $username  Username
-     * @param  string  $password  Password
-     * @return null|boolean
-     */
-    public function authenticate($username, $password)
-    {
-        if (! function_exists('ldap_connect')) {
-            die('The PHP LDAP extension is required');
-        }
-
-        // Skip SSL certificate verification
-        if (! LDAP_SSL_VERIFY) {
-            putenv('LDAPTLS_REQCERT=never');
-        }
-
-        $ldap = ldap_connect(LDAP_SERVER, LDAP_PORT);
-
-        if (! is_resource($ldap)) {
-            die('Unable to connect to the LDAP server: "'.LDAP_SERVER.'"');
-        }
-
-        ldap_set_option($ldap, LDAP_OPT_PROTOCOL_VERSION, 3);
-        ldap_set_option($ldap, LDAP_OPT_REFERRALS, 0);
-
-        if (! @ldap_bind($ldap, LDAP_USERNAME, LDAP_PASSWORD)) {
-            die('Unable to bind to the LDAP server: "'.LDAP_SERVER.'"');
-        }
-
-        $sr = @ldap_search($ldap, LDAP_ACCOUNT_BASE, sprintf(LDAP_USER_PATTERN, $username), array(LDAP_ACCOUNT_FULLNAME, LDAP_ACCOUNT_EMAIL));
-
-        if ($sr === false) {
-            return false;
-        }
-
-        $info = ldap_get_entries($ldap, $sr);
-
-        // User not found
-        if (count($info) == 0 || $info['count'] == 0) {
-            return false;
-        }
-
-        if (@ldap_bind($ldap,  $info[0]['dn'], $password)) {
-            return $this->create($username, $info[0][LDAP_ACCOUNT_FULLNAME][0], $info[0][LDAP_ACCOUNT_EMAIL][0]);
-        }
-
-        return false;
-    }
-
-    /**
-     * Create automatically a new local user after the LDAP authentication
-     *
-     * @access public
-     * @param  string  $username  Username
-     * @param  string  $name      Name of the user
-     * @param  string  $email       Email address
-     * @return bool
-     */
-    public function create($username, $name, $email)
-    {
-        $user = $this->user->getByUsername($username);
-
-        // There is an existing user account
-        if ($user) {
-
-            if ($user['is_ldap_user'] == 1) {
-
-                // LDAP user already created
-                return true;
-            }
-            else {
-
-                // There is already a local user with that username
-                return false;
-            }
-        }
-
-        // Create a LDAP user
-        $values = array(
-            'username' => $username,
-            'name' => $name,
-            'email' => $email,
-            'is_admin' => 0,
-            'is_ldap_user' => 1,
-        );
-
-        return $userModel->create($values);
-    }
-}
diff --git a/app/Model/User.php b/app/Model/User.php
index d0e33fd0..5f6b8a3a 100644
--- a/app/Model/User.php
+++ b/app/Model/User.php
@@ -312,84 +312,6 @@ class User extends Base
     }
 
     /**
-     * Validate user login
-     *
-     * @access public
-     * @param  array   $values           Form values
-     * @return array   $valid, $errors   [0] = Success or not, [1] = List of errors
-     */
-    public function validateLogin(array $values)
-    {
-        $v = new Validator($values, array(
-            new Validators\Required('username', t('The username is required')),
-            new Validators\MaxLength('username', t('The maximum length is %d characters', 50), 50),
-            new Validators\Required('password', t('The password is required')),
-        ));
-
-        $result = $v->execute();
-        $errors = $v->getErrors();
-
-        if ($result) {
-
-            list($authenticated, $method) = $this->authenticate($values['username'], $values['password']);
-
-            if ($authenticated === true) {
-
-                // Create the user session
-                $user = $this->getByUsername($values['username']);
-                $this->updateSession($user);
-
-                // Update login history
-                $this->lastLogin->create(
-                    $method,
-                    $user['id'],
-                    $this->getIpAddress(),
-                    $this->getUserAgent()
-                );
-
-                // Setup the remember me feature
-                if (! empty($values['remember_me'])) {
-                    $credentials = $this->rememberMe->create($user['id'], $this->getIpAddress(), $this->getUserAgent());
-                    $this->rememberMe->writeCookie($credentials['token'], $credentials['sequence'], $credentials['expiration']);
-                }
-            }
-            else {
-                $result = false;
-                $errors['login'] = t('Bad username or password');
-            }
-        }
-
-        return array(
-            $result,
-            $errors
-        );
-    }
-
-    /**
-     * Authenticate a user
-     *
-     * @access public
-     * @param  string  $username  Username
-     * @param  string  $password  Password
-     * @return array
-     */
-    public function authenticate($username, $password)
-    {
-        // Database authentication
-        $user = $this->db->table(self::TABLE)->eq('username', $username)->eq('is_ldap_user', 0)->findOne();
-        $authenticated = $user && \password_verify($password, $user['password']);
-        $method = LastLogin::AUTH_DATABASE;
-
-        // LDAP authentication
-        if (! $authenticated && LDAP_AUTH) {
-            $authenticated = $this->ldap->authenticate($username, $password);
-            $method = LastLogin::AUTH_LDAP;
-        }
-
-        return array($authenticated, $method);
-    }
-
-    /**
      * Get the user agent of the connected user
      *
      * @access public
diff --git a/app/common.php b/app/common.php
index 9ce0016a..55ecd894 100644
--- a/app/common.php
+++ b/app/common.php
@@ -4,7 +4,19 @@ require __DIR__.'/Core/Loader.php';
 require __DIR__.'/helpers.php';
 require __DIR__.'/translator.php';
 
-require 'vendor/swiftmailer/swift_required.php';
+require __DIR__.'/../vendor/SimpleValidator/Validator.php';
+require __DIR__.'/../vendor/SimpleValidator/Base.php';
+require __DIR__.'/../vendor/SimpleValidator/Validators/Required.php';
+require __DIR__.'/../vendor/SimpleValidator/Validators/Unique.php';
+require __DIR__.'/../vendor/SimpleValidator/Validators/MaxLength.php';
+require __DIR__.'/../vendor/SimpleValidator/Validators/MinLength.php';
+require __DIR__.'/../vendor/SimpleValidator/Validators/Integer.php';
+require __DIR__.'/../vendor/SimpleValidator/Validators/Equals.php';
+require __DIR__.'/../vendor/SimpleValidator/Validators/AlphaNumeric.php';
+require __DIR__.'/../vendor/SimpleValidator/Validators/GreaterThan.php';
+require __DIR__.'/../vendor/SimpleValidator/Validators/Date.php';
+require __DIR__.'/../vendor/SimpleValidator/Validators/Email.php';
+require __DIR__.'/../vendor/SimpleValidator/Validators/Numeric.php';
 
 use Core\Event;
 use Core\Loader;
@@ -47,6 +59,10 @@ defined('LDAP_AUTH') or define('LDAP_AUTH', false);
 defined('LDAP_SERVER') or define('LDAP_SERVER', '');
 defined('LDAP_PORT') or define('LDAP_PORT', 389);
 defined('LDAP_SSL_VERIFY') or define('LDAP_SSL_VERIFY', true);
+defined('LDAP_USERNAME') or define('LDAP_USERNAME', null);
+defined('LDAP_PASSWORD') or define('LDAP_PASSWORD', null);
+defined('LDAP_ACCOUNT_BASE') or define('LDAP_ACCOUNT_BASE', '');
+defined('LDAP_USER_PATTERN') or define('LDAP_USER_PATTERN', '');
 defined('LDAP_ACCOUNT_FULLNAME') or define('LDAP_ACCOUNT_FULLNAME', 'displayname');
 defined('LDAP_ACCOUNT_EMAIL') or define('LDAP_ACCOUNT_EMAIL', 'mail');