Got LDAP auth working to a functional state

app/Http/Controllers/Auth/AuthController.php

@@ -2,6 +2,7 @@
 
 namespace BookStack\Http\Controllers\Auth;
 
+use Illuminate\Contracts\Auth\Authenticatable;
 use Illuminate\Http\Request;
 use BookStack\Exceptions\SocialSignInException;
 use BookStack\Exceptions\UserRegistrationException;
@@ -31,6 +32,8 @@ class AuthController extends Controller
 
     protected $redirectPath = '/';
     protected $redirectAfterLogout = '/login';
+    protected $username = 'email';
+
 
     protected $socialAuthService;
     protected $emailConfirmationService;
@@ -48,6 +51,7 @@ class AuthController extends Controller
         $this->socialAuthService = $socialAuthService;
         $this->emailConfirmationService = $emailConfirmationService;
         $this->userRepo = $userRepo;
+        $this->username = config('auth.method') === 'standard' ? 'email' : 'username';
         parent::__construct();
     }
 
@@ -104,6 +108,24 @@ class AuthController extends Controller
         return $this->registerUser($userData);
     }
 
+
+    /**
+     * Overrides the action when a user is authenticated.
+     * If the user authenticated but does not exist in the user table we create them.
+     * @param Request         $request
+     * @param Authenticatable $user
+     * @return \Illuminate\Http\RedirectResponse
+     */
+    protected function authenticated(Request $request, Authenticatable $user)
+    {
+        if(!$user->exists) {
+            $user->save();
+            $this->userRepo->attachDefaultRole($user);
+            auth()->login($user);
+        }
+        return redirect()->intended($this->redirectPath());
+    }
+
     /**
      * Register a new user after a registration callback.
      * @param $socialDriver
@@ -232,7 +254,7 @@ class AuthController extends Controller
     public function getLogin()
     {
         $socialDrivers = $this->socialAuthService->getActiveDrivers();
-        $authMethod = 'standard'; // TODO - rewrite to use config.
+        $authMethod = config('auth.method');
         return view('auth/login', ['socialDrivers' => $socialDrivers, 'authMethod' => $authMethod]);
     }
 

app/Http/routes.php

@@ -3,7 +3,7 @@
 Route::get('/test', function() {
     // TODO - remove this
     $service = new \BookStack\Services\LdapService();
-    $service->getUserDetails('ssmith');
+    dd($service->getUserDetails('ksmith'));
 });
 
 // Authenticated routes...

app/Providers/AuthServiceProvider.php

@@ -25,7 +25,7 @@ class AuthServiceProvider extends ServiceProvider
     public function register()
     {
         Auth::provider('ldap', function($app, array $config) {
-            return new LdapUserProvider($config['model']);
+            return new LdapUserProvider($config['model'], $app['BookStack\Services\LdapService']);
         });
     }
 }

app/Providers/LdapUserProvider.php

@@ -3,6 +3,8 @@
 namespace BookStack\Providers;
 
 
+use BookStack\Role;
+use BookStack\Services\LdapService;
 use BookStack\User;
 use Illuminate\Contracts\Auth\Authenticatable;
 use Illuminate\Contracts\Auth\UserProvider;
@@ -17,14 +19,21 @@ class LdapUserProvider implements UserProvider
      */
     protected $model;
 
+    /**
+     * @var LdapService
+     */
+    protected $ldapService;
+
 
     /**
      * LdapUserProvider constructor.
      * @param             $model
+     * @param LdapService $ldapService
      */
-    public function __construct($model)
+    public function __construct($model, LdapService $ldapService)
     {
         $this->model = $model;
+        $this->ldapService = $ldapService;
     }
 
     /**
@@ -34,8 +43,7 @@ class LdapUserProvider implements UserProvider
      */
     public function createModel()
     {
-        $class = '\\'.ltrim($this->model, '\\');
-
+        $class = '\\' . ltrim($this->model, '\\');
         return new $class;
     }
 
@@ -91,16 +99,21 @@ class LdapUserProvider implements UserProvider
      */
     public function retrieveByCredentials(array $credentials)
     {
-        // TODO: Implement retrieveByCredentials() method.
-
         // Get user via LDAP
+        $userDetails = $this->ldapService->getUserDetails($credentials['username']);
+        if ($userDetails === null) return null;
 
         // Search current user base by looking up a uid
+        $model = $this->createModel();
+        $currentUser = $model->newQuery()
+            ->where('external_auth_id', $userDetails['uid'])
+            ->first();
 
-        // If not exists create a new user instance with attached role
-        // but do not store it in the database yet
+        if ($currentUser !== null) return $currentUser;
 
-        //
+        $model->name = $userDetails['name'];
+        $model->external_auth_id = $userDetails['uid'];
+        return $model;
     }
 
     /**
@@ -112,6 +125,6 @@ class LdapUserProvider implements UserProvider
      */
     public function validateCredentials(Authenticatable $user, array $credentials)
     {
-        // TODO: Implement validateCredentials() method.
+        return $this->ldapService->validateUserCredentials($user, $credentials['username'], $credentials['password']);
     }
 }

app/Repos/UserRepo.php

@@ -3,6 +3,7 @@
 
 use BookStack\Role;
 use BookStack\User;
+use Setting;
 
 class UserRepo
 {
@@ -56,7 +57,7 @@ class UserRepo
      */
     public function attachDefaultRole($user)
     {
-        $roleId = \Setting::get('registration-role');
+        $roleId = Setting::get('registration-role');
         if ($roleId === false) $roleId = $this->role->getDefault()->id;
         $user->attachRoleId($roleId);
     }

app/Role.php

@@ -7,7 +7,7 @@ use Illuminate\Database\Eloquent\Model;
 class Role extends Model
 {
     /**
-     * Sets the default role name for newly registed users.
+     * Sets the default role name for newly registered users.
      * @var string
      */
     protected static $default = 'viewer';

app/Services/LdapService.php

@@ -2,18 +2,94 @@
 
 
 use BookStack\Exceptions\LdapException;
+use Illuminate\Contracts\Auth\Authenticatable;
 
 class LdapService
 {
 
+    protected $ldapConnection;
+
+    /**
+     * Get the details of a user from LDAP using the given username.
+     * User found via configurable user filter.
+     * @param $userName
+     * @return array|null
+     * @throws LdapException
+     */
     public function getUserDetails($userName)
     {
+        $ldapConnection = $this->getConnection();
 
-        if(!function_exists('ldap_connect')) {
+        // Find user
+        $userFilter = $this->buildFilter(config('services.ldap.user_filter'), ['user' => $userName]);
+        $baseDn = config('services.ldap.base_dn');
+        $ldapSearch = ldap_search($ldapConnection, $baseDn, $userFilter, ['cn', 'uid', 'dn']);
+        $users = ldap_get_entries($ldapConnection, $ldapSearch);
+        if ($users['count'] === 0) return null;
+
+        $user = $users[0];
+        return [
+            'uid'  => $user['uid'][0],
+            'name' => $user['cn'][0],
+            'dn'   => $user['dn']
+        ];
+    }
+
+    /**
+     * @param Authenticatable $user
+     * @param string          $username
+     * @param string          $password
+     * @return bool
+     * @throws LdapException
+     */
+    public function validateUserCredentials(Authenticatable $user, $username, $password)
+    {
+        $ldapUser = $this->getUserDetails($username);
+        if ($ldapUser === null) return false;
+        if ($ldapUser['uid'] !== $user->external_auth_id) return false;
+
+        $ldapConnection = $this->getConnection();
+        $ldapBind = @ldap_bind($ldapConnection, $ldapUser['dn'], $password);
+        return $ldapBind;
+    }
+
+    /**
+     * Bind the system user to the LDAP connection using the given credentials
+     * otherwise anonymous access is attempted.
+     * @param $connection
+     * @throws LdapException
+     */
+    protected function bindSystemUser($connection)
+    {
+        $ldapDn = config('services.ldap.dn');
+        $ldapPass = config('services.ldap.pass');
+
+        $isAnonymous = ($ldapDn === false || $ldapPass === false);
+        if ($isAnonymous) {
+            $ldapBind = ldap_bind($connection);
+        } else {
+            $ldapBind = ldap_bind($connection, $ldapDn, $ldapPass);
+        }
+
+        if (!$ldapBind) throw new LdapException('LDAP access failed using ' . $isAnonymous ? ' anonymous bind.' : ' given dn & pass details');
+    }
+
+    /**
+     * Get the connection to the LDAP server.
+     * Creates a new connection if one does not exist.
+     * @return resource
+     * @throws LdapException
+     */
+    protected function getConnection()
+    {
+        if ($this->ldapConnection !== null) return $this->ldapConnection;
+
+        // Check LDAP extension in installed
+        if (!function_exists('ldap_connect')) {
             throw new LdapException('LDAP PHP extension not installed');
         }
 
-
+        // Get port from server string if specified.
         $ldapServer = explode(':', config('services.ldap.server'));
         $ldapConnection = ldap_connect($ldapServer[0], count($ldapServer) > 1 ? $ldapServer[1] : 389);
 
@@ -21,37 +97,24 @@ class LdapService
             throw new LdapException('Cannot connect to ldap server, Initial connection failed');
         }
 
-        // Options
-
+        // Set any required options
         ldap_set_option($ldapConnection, LDAP_OPT_PROTOCOL_VERSION, 3); // TODO - make configurable
 
-        $ldapDn = config('services.ldap.dn');
-        $ldapPass = config('services.ldap.pass');
-        $isAnonymous = ($ldapDn === false || $ldapPass === false);
-        if ($isAnonymous) {
-            $ldapBind = ldap_bind($ldapConnection);
-        } else {
-            $ldapBind = ldap_bind($ldapConnection, $ldapDn, $ldapPass);
+        $this->ldapConnection = $ldapConnection;
+        return $this->ldapConnection;
     }
 
-        if (!$ldapBind) throw new LdapException('LDAP access failed using ' . $isAnonymous ? ' anonymous bind.' : ' given dn & pass details');
-
-        // Find user
-        $userFilter = $this->buildFilter(config('services.ldap.user_filter'), ['user' => $userName]);
-        //dd($userFilter);
-        $baseDn = config('services.ldap.base_dn');
-        $ldapSearch = ldap_search($ldapConnection, $baseDn, $userFilter);
-        $users = ldap_get_entries($ldapConnection, $ldapSearch);
-
-        dd($users);
-    }
-
-
-    private function buildFilter($filterString, $attrs)
+    /**
+     * Build a filter string by injecting common variables.
+     * @param       $filterString
+     * @param array $attrs
+     * @return string
+     */
+    protected function buildFilter($filterString, array $attrs)
     {
         $newAttrs = [];
         foreach ($attrs as $key => $attrText) {
-            $newKey = '${'.$key.'}';
+            $newKey = '${' . $key . '}';
             $newAttrs[$newKey] = $attrText;
         }
         return strtr($filterString, $newAttrs);

config/auth.php

@@ -70,7 +70,7 @@ return [
     'providers' => [
         'users' => [
             'driver' => env('AUTH_METHOD', 'eloquent'),
-            'model' => Bookstack\User::class,
+            'model' => BookStack\User::class,
         ],
 
         // 'users' => [

database/migrations/2016_01_11_210908_add_external_auth_to_users.php

@@ -0,0 +1,31 @@
+<?php
+
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class AddExternalAuthToUsers extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('users', function (Blueprint $table) {
+            $table->string('external_auth_id')->index();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('users', function (Blueprint $table) {
+            $table->dropColumn('external_auth_id');
+        });
+    }
+}

resources/views/auth/forms/login/ldap.blade.php

@@ -1,6 +1,6 @@
 <div class="form-group">
-    <label for="email">Username</label>
-    @include('form/text', ['name' => 'email', 'tabindex' => 1])
+    <label for="username">Username</label>
+    @include('form/text', ['name' => 'username', 'tabindex' => 1])
 </div>
 
 <div class="form-group">