New feature: basic LDAP authentication plugin

application/controllers/admin/authentication.php

@@ -58,6 +58,9 @@ public function index()
 
         if (!$beforeLogin->isStopped() && is_null(App()->getRequest()->getPost('login_submit')))
         {
+            if (!is_null($beforeLogin->get('default'))) {
+                $aData['defaultAuth'] = $beforeLogin->get('default');
+            }
             $newLoginForm = new PluginEvent('newLoginForm');    
             App()->getPluginManager()->dispatchEvent($newLoginForm);
             $aData['summary'] = $this->_getSummary('logout');

application/core/plugins/AuthLDAP/AuthLDAP.php

@@ -0,0 +1,110 @@
+<?php
+class AuthLDAP extends AuthPluginBase
+{
+    protected $storage = 'DbStorage';
+
+    static protected $description = 'Core: Basic LDAP authentication';
+    static protected $name = 'LDAP';
+
+    protected $settings = array(
+        'server' => array(
+            'type' => 'string',
+            'label' => 'Ldap server e.g. ldap://ldap.mydomain.com'
+        ),
+        'domainsuffix' => array(
+            'type' => 'string',
+            'label' => 'Domain suffix for username e.g. @mydomain.com'
+        ),
+        'is_default' => array(
+            'type' => 'boolean',
+            'label' => 'Should this plugin present itself as default authentication method?'
+        )
+    );
+
+    public function __construct(PluginManager $manager, $id) {
+        parent::__construct($manager, $id);
+
+        /**
+         * Here you should handle subscribing to the events your plugin will handle
+         */
+        $this->subscribe('beforeLogin');
+        $this->subscribe('newLoginForm');
+        $this->subscribe('afterLoginFormSubmit');
+        $this->subscribe('newUserSession');
+        $this->subscribe('beforeDeactivate');
+    }
+
+    public function beforeDeactivate()
+    {
+        $this->getEvent()->set('success', false);
+
+        // Optionally set a custom error message.
+        $this->getEvent()->set('message', gT('Core plugin can not be disabled.'));
+    }
+
+    public function beforeLogin()
+    {
+        if ($this->get('is_default', null, null, false) == true) { 
+            // This is configured to be the default login method
+            $this->getEvent()->set('default', get_class($this));
+        }
+    }
+
+    public function newLoginForm()
+    {
+        $this->getEvent()->getContent($this)
+             ->addContent(CHtml::tag('li', array(), "<label for='user'>"  . gT("Username") . "</label><input name='user' id='user' type='text' size='40' maxlength='40' value='' />"))
+             ->addContent(CHtml::tag('li', array(), "<label for='password'>"  . gT("Password") . "</label><input name='password' id='password' type='password' size='40' maxlength='40' value='' />"));
+    }
+
+    public function afterLoginFormSubmit()
+    {
+        // Here we handle post data        
+        $request = $this->api->getRequest();
+        if ($request->getIsPostRequest()) {
+            $this->setUsername( $request->getPost('user'));
+            $this->setPassword($request->getPost('password'));
+        }
+    }
+
+    public function newUserSession()
+    {
+        // Here we do the actual authentication       
+        $username = $this->getUsername();
+        $password = $this->getPassword();
+
+        $user = $this->api->getUserByName($username);
+
+        if ($user === null)
+        {
+            // If the user doesnt exist ín th eLS database, he can not login
+            $this->setAuthFailure(self::ERROR_USERNAME_INVALID);
+            return;
+        }
+
+        // Get configuration settings:
+        $ldapserver = $this->get('server');        
+        $domain     = $this->get('domainsuffix');;
+
+        // Try to connect
+        $ldapconn = ldap_connect($ldapserver);
+        if (false == $ldapconn) {
+            $this->setAuthFailure(1, gT('Could not connect to LDAP server.'));
+            return;
+        }
+
+        if($ldapconn) {
+            // binding to ldap server
+            $ldapbind = ldap_bind($ldapconn, $username.$domain, $password);
+            // verify binding
+            if (!$ldapbind) {
+                $this->setAuthFailure(100, ldap_error($ldapconn));
+                ldap_close($ldapconn); // all done? close connection
+                return;
+            }
+            ldap_close($ldapconn); // all done? close connection
+        }
+
+        $this->setAuthSuccess($user);
+    }
+}