diff --git a/README.md b/README.md
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--- /dev/null
+++ b/README.md
@@ -0,0 +1,10 @@
+user_sql
+========
+
+Owncloud SQL authentification
+
+This is plugin is heavily based on user_imap, user_pwauth and user_ldap!
+
+Enable it in your Admin -> Apps section and configure your server's details.
+Currently, it only works with mySQL and the crypt() password encryption string. 
+It was tested and developed for a postfixadmin database.
diff --git a/appinfo/app.php b/appinfo/app.php
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--- /dev/null
+++ b/appinfo/app.php
@@ -0,0 +1,49 @@
+<?php
+
+/**
+* ownCloud - user_sql
+*
+* @author Andreas Böhler
+* @copyright 2012 Andreas Böhler <andreas (at) aboehler (dot) at>
+*
+* This library is free software; you can redistribute it and/or
+* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
+* License as published by the Free Software Foundation; either
+* version 3 of the License, or any later version.
+*
+* This library is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
+*
+* You should have received a copy of the GNU Affero General Public
+* License along with this library.  If not, see <http://www.gnu.org/licenses/>.
+*
+*/
+
+require_once('apps/user_sql/user_sql.php');
+
+OC_App::registerAdmin('user_sql','settings');
+
+// define IMAP_DEFAULTs
+define('OC_USER_BACKEND_SQL_DEFAULT_HOST', 'localhost');
+define('OC_USER_BACKEND_SQL_DEFAULT_USER', 'mail_admin');
+define('OC_USER_BACKEND_SQL_DEFAULT_DB', 'postfixadmin');
+define('OC_USER_BACKEND_SQL_DEFAULT_PASSWORD', 'password');
+define('OC_USER_BACKEND_SQL_DEFAULT_TABLE', 'users');
+define('OC_USER_BACKEND_SQL_DEFAULT_PW_COLUMN', 'password');
+define('OC_USER_BACKEND_SQL_DEFAULT_USER_COLUMN', 'username');
+
+// register user backend
+OC_User::registerBackend('SQL');
+OC_User::useBackend('SQL');
+
+// add settings page to navigation
+$entry = array(
+        'id' => "user_sql_settings",
+        'order'=>1,
+        'href' => OC_Helper::linkTo( "user_sql", "settings.php" ),
+        'name' => 'SQL'
+);
+
+
diff --git a/appinfo/info.xml b/appinfo/info.xml
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--- /dev/null
+++ b/appinfo/info.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0"?>
+<info>
+       <id>user_sql</id>
+       <name>SQL user backend</name>
+       <description>Authenticate Users by SQL</description>
+       <licence>AGPL</licence>
+       <author>Andreas Boehler &lt;andreas.boehler@pmu.ac.at&gt;</author>
+       <require>4.5</require>
+       <shipped>false</shipped>
+       <types>
+       		<authentication/>
+       </types>
+</info>
diff --git a/appinfo/version b/appinfo/version
new file mode 100644
--- /dev/null
+++ b/appinfo/version
@@ -0,0 +1,1 @@
+0.1
diff --git a/js/settings.js b/js/settings.js
new file mode 100644
--- /dev/null
+++ b/js/settings.js
@@ -0,0 +1,1 @@
+//
diff --git a/settings.php b/settings.php
new file mode 100644
--- /dev/null
+++ b/settings.php
@@ -0,0 +1,51 @@
+<?php
+
+/**
+ * ownCloud - user_sql
+ *
+ * @author Andreas Böhler
+ * @copyright 2012 Andreas Böhler <andreas (at) aboehler (dot) at>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU AFFERO GENERAL PUBLIC LICENSE for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public
+ * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+$params = array('sql_host', 'sql_user', 'sql_database', 'sql_password', 'sql_table', 'sql_column_username', 'sql_column_password');
+
+OCP\Util::addscript('user_sql', 'settings');
+
+if ($_POST) {
+       foreach($params as $param){
+               if(isset($_POST[$param])){
+                       OCP\Config::setAppValue('user_sql', $param, $_POST[$param]);
+               }
+       }
+}
+
+// fill template
+$tmpl = new OCP\Template( 'user_sql', 'settings');
+foreach($params as $param){
+       $value = htmlentities(OCP\Config::getAppValue('user_sql', $param,''));
+       $tmpl->assign($param, $value);
+}
+
+// settings with default values
+$tmpl->assign( 'sql_host', OCP\Config::getAppValue('user_sql', 'sql_host', OC_USER_BACKEND_SQL_DEFAULT_HOST));
+$tmpl->assign( 'sql_user', OCP\Config::getAppValue('user_sql', 'sql_user', OC_USER_BACKEND_SQL_DEFAULT_USER));
+$tmpl->assign( 'sql_database', OCP\Config::getAppValue( 'user_sql', 'sql_database', OC_USER_BACKEND_SQL_DEFAULT_DB));
+$tmpl->assign( 'sql_password', OCP\Config::getAppValue( 'user_sql', 'sql_password', OC_USER_BACKEND_SQL_DEFAULT_PASSWORD));
+$tmpl->assign( 'sql_table', OCP\Config::getAppValue( 'user_sql', 'sql_table', OC_USER_BACKEND_SQL_DEFAULT_TABLE));
+$tmpl->assign( 'sql_column_password', OCP\Config::getAppValue( 'user_sql', 'sql_column_password', OC_USER_BACKEND_SQL_DEFAULT_PW_COLUMN));
+$tmpl->assign( 'sql_column_username', OCP\Config::getAppValue( 'user_sql', 'sql_column_username', OC_USER_BACKEND_SQL_DEFAULT_USER_COLUMN));
+
+return $tmpl->fetchPage();
diff --git a/templates/settings.php b/templates/settings.php
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--- /dev/null
+++ b/templates/settings.php
@@ -0,0 +1,14 @@
+<form id="sql" action="#" method="post">
+       <fieldset class="personalblock">
+               <legend><?php echo $l->t('SQL'); ?></legend>
+               <p><label for="sql_host"><?php echo $l->t('Host');?></label><input type="text" id="sql_host" name="sql_host" value="<?php echo $_['sql_host']; ?>"></p>
+               <p><label for="sql_user"><?php echo $l->t('Username');?></label><input type="text" id="sql_user" name="sql_user" value="<?php echo $_['sql_user']; ?>" /></p>
+               <p><label for="sql_database"><?php echo $l->t('Database');?></label><input type="text" id="sql_database" name="sql_database" value="<?php echo $_['sql_database']; ?>" /></p>
+               <p><label for="sql_password"><?php echo $l->t('Password');?></label><input type="password" id="sql_password" name="sql_password" value="<?php echo $_['sql_password']; ?>" /></p>
+               <p><label for="sql_table"><?php echo $l->t('Table');?></label><input type="text" id="sql_table" name="sql_table" value="<?php echo $_['sql_table']; ?>" /></p>
+               <p><label for="sql_column_username"><?php echo $l->t('Username Column');?></label><input type="text" id="sql_column_username" name="sql_column_username" value="<?php echo $_['sql_column_username']; ?>" /></p>
+               <p><label for="sql_column_password"><?php echo $l->t('Password Column');?></label><input type="text" id="sql_column_password" name="sql_column_password" value="<?php echo $_['sql_column_password']; ?>" /></p>
+
+       <input type="submit" value="<?php echo $l->t('Save'); ?>" />
+       </fieldset>
+</form>
diff --git a/user_sql.php b/user_sql.php
new file mode 100644
--- /dev/null
+++ b/user_sql.php
@@ -0,0 +1,194 @@
+<?php
+
+/**
+ * ownCloud - user_sql
+ *
+ * @author Andreas Böhler
+ * @copyright 2012 Andreas Böhler <andreas (at) aboehler (dot) at>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU AFFERO GENERAL PUBLIC LICENSE for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public
+ * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+class OC_USER_SQL extends OC_User_Backend implements OC_User_Interface {
+
+       // cached settings
+        protected $sql_host;
+        protected $sql_username;
+        protected $sql_database;
+        protected $sql_password;
+        protected $sql_table;
+        protected $sql_column_username;
+        protected $sql_column_password;
+
+       public function __construct() {
+                $this->sql_host = OCP\Config::getAppValue('user_sql', 'sql_host', '');
+                $this->sql_username = OCP\Config::getAppValue('user_sql', 'sql_user', '');
+                $this->sql_database = OCP\Config::getAppValue('user_sql', 'sql_database', '');
+                $this->sql_password = OCP\Config::getAppValue('user_sql', 'sql_password', '');
+                $this->sql_table = OCP\Config::getAppValue('user_sql', 'sql_table', '');
+                $this->sql_column_username = OCP\Config::getAppValue('user_sql', 'sql_column_username', '');
+                $this->sql_column_password = OCP\Config::getAppValue('user_sql', 'sql_column_password', '');
+       }
+
+	    public function implementsAction($actions) {
+		    return (bool)((OC_USER_BACKEND_CHECK_PASSWORD) & $actions);
+	    }
+
+	    public function createUser() {
+            // Can't create user
+            OC_Log::write('OC_USER_SQL', 'Not possible to create local users from web frontend using SQL user backend',3);
+            return false;
+        }
+
+        public function deleteUser( $uid ) {
+            // Can't delete user
+            OC_Log::write('OC_USER_SQL', 'Not possible to delete local users from web frontend using SQL user backend',3);
+            return false;
+        }
+
+        public function setPassword ( $uid, $password ) {
+            // We can't change user password
+            OC_Log::write('OC_USER_SQL', 'Not possible to change password for local users from web frontend using SQL user backend',3);
+            return false;
+        }
+
+       /**
+        * @brief Check if the password is correct
+        * @param $uid The username
+        * @param $password The password
+        * @returns true/false
+        *
+        * Check if the password is correct without logging in the user
+        */
+       public function checkPassword($uid, $password){
+           $db = mysqli_connect ($this->sql_host, $this->sql_username, $this->sql_password);
+           if ($db) 
+           {
+               $success = mysqli_select_db ($db, $this->sql_database);
+               if(!$success)
+               {
+                return false;
+               }
+           }
+           else
+           {
+            return false;
+           }
+		    $query = "SELECT $this->sql_column_username, $this->sql_column_password FROM $this->sql_table WHERE $this->sql_column_username = '$uid';";
+		    $result = mysqli_query($db, $query);
+		    if(!$result)
+		    {
+		        return false;
+		    }
+		    if(mysqli_num_rows($result) == 0)
+		    {
+		        return false;
+		    }
+		    $row = mysqli_fetch_row($result);
+		    if(crypt($password, $row[1]) == $row[1])
+		    {
+		        return $uid;
+		    }
+		    else
+		    {
+		        return false;
+		    }
+       }
+
+       /**
+        * @brief Get a list of all users
+        * @returns array with all uids
+        *
+        * Get a list of all users.
+        */
+
+       public function getUsers($search = '', $limit = null, $offset = null){
+           $users = array();
+           $db = mysqli_connect ($this->sql_host, $this->sql_username, $this->sql_password);
+           if ($db) 
+           {
+               $success = mysqli_select_db ($db, $this->sql_database);
+               if(!$success)
+               {
+                return false;
+               }
+           }
+           else
+           {
+            return false;
+           }
+		   $query = "SELECT $this->sql_column_username FROM $this->sql_table";
+		   if($search != '')
+		      $query .= " WHERE $this->sql_column_username LIKE '%$search%'";
+		   if($limit != null)
+		      $query .= " LIMIT $limit";
+		   if($offset != null)
+		      $query .= " OFFSET $offset";
+		   $result = mysqli_query($db, $query);
+		   if(!$result)
+		   {
+		    return array();
+		   }
+		   if(mysqli_num_rows($result) == 0)
+		   {
+		    return array();
+		   }
+		   while($row = mysqli_fetch_row($result))
+		   {
+		       $users[] = $row[0];
+		   }
+           return $users;
+       }
+
+       /**
+        * @brief check if a user exists
+        * @param string $uid the username
+        * @return boolean
+        */
+
+       public function userExists($uid)
+       {
+           $db = mysqli_connect ($this->sql_host, $this->sql_username, $this->sql_password);
+           if ($db) 
+           {
+               $success = mysqli_select_db ($db, $this->sql_database);
+               if(!$success)
+               {
+                return false;
+               }
+		    $query = "SELECT $this->sql_column_username FROM $this->sql_table WHERE $this->sql_column_username = '$uid';";
+		    $result = mysqli_query($db, $query);
+		    if(!$result)
+		    {
+		        return false;
+		    }
+		    if(mysqli_num_rows($result) == 0)
+		    {
+		        return false;
+		    }
+		    return true;
+               
+               
+           }
+           else
+           {
+            return false;
+           }
+
+       }
+
+}
+
+?>