Refactor authentication system.

Big work, not finished. A lot of features have been removed.

See https://github.com/marienfressinaud/FreshRSS/issues/655

20 files changed, 309 insertions, 434 deletions

diff --git a/app/Controllers/categoryController.php b/app/Controllers/categoryController.php
index c79f37fa4..537a2b210 100644
--- a/app/Controllers/categoryController.php
+++ b/app/Controllers/categoryController.php
@@ -12,7 +12,7 @@ class FreshRSS_category_Controller extends Minz_ActionController {
 	 *
 	 */
 	public function firstAction() {
-		if (!$this->view->loginOk) {
+		if (!FreshRSS_Auth::hasAccess()) {
 			Minz_Error::error(
 				403,
 				array('error' => array(_t('access_denied')))
diff --git a/app/Controllers/configureController.php b/app/Controllers/configureController.php
index 789e9dfb0..7e77a757a 100755
--- a/app/Controllers/configureController.php
+++ b/app/Controllers/configureController.php
@@ -10,7 +10,7 @@ class FreshRSS_configure_Controller extends Minz_ActionController {
 	 * underlying framework.
 	 */
 	public function firstAction() {
-		if (!$this->view->loginOk) {
+		if (!FreshRSS_Auth::hasAccess()) {
 			Minz_Error::error(
 				403,
 				array('error' => array(_t('access_denied')))
diff --git a/app/Controllers/entryController.php b/app/Controllers/entryController.php
index c46fbf346..a1dfacb4d 100755
--- a/app/Controllers/entryController.php
+++ b/app/Controllers/entryController.php
@@ -10,7 +10,7 @@ class FreshRSS_entry_Controller extends Minz_ActionController {
 	 * underlying framework.
 	 */
 	public function firstAction() {
-		if (!$this->view->loginOk) {
+		if (!FreshRSS_Auth::hasAccess()) {
 			Minz_Error::error(
 				403,
 				array('error' => array(_t('access_denied')))
diff --git a/app/Controllers/feedController.php b/app/Controllers/feedController.php
index 18829d252..2a7238eaf 100755
--- a/app/Controllers/feedController.php
+++ b/app/Controllers/feedController.php
@@ -10,7 +10,7 @@ class FreshRSS_feed_Controller extends Minz_ActionController {
 	 * underlying framework.
 	 */
 	public function firstAction() {
-		if (!$this->view->loginOk) {
+		if (!FreshRSS_Auth::hasAccess()) {
 			// Token is useful in the case that anonymous refresh is forbidden
 			// and CRON task cannot be used with php command so the user can
 			// set a CRON task to refresh his feeds by using token inside url
diff --git a/app/Controllers/importExportController.php b/app/Controllers/importExportController.php
index 57759f277..aaac1b68b 100644
--- a/app/Controllers/importExportController.php
+++ b/app/Controllers/importExportController.php
@@ -10,7 +10,7 @@ class FreshRSS_importExport_Controller extends Minz_ActionController {
 	 * underlying framework.
 	 */
 	public function firstAction() {
-		if (!$this->view->loginOk) {
+		if (!FreshRSS_Auth::hasAccess()) {
 			Minz_Error::error(
 				403,
 				array('error' => array(_t('access_denied')))
diff --git a/app/Controllers/indexController.php b/app/Controllers/indexController.php
index 0d2eff700..3006480f9 100755
--- a/app/Controllers/indexController.php
+++ b/app/Controllers/indexController.php
@@ -8,7 +8,7 @@ class FreshRSS_index_Controller extends Minz_ActionController {
 		$token = $this->view->conf->token;
 
 		// check if user is logged in
-		if (!$this->view->loginOk && !Minz_Configuration::allowAnonymous()) {
+		if (!FreshRSS_Auth::hasAccess() && !Minz_Configuration::allowAnonymous()) {
 			$token_param = Minz_Request::param('token', '');
 			$token_is_ok = ($token != '' && $token === $token_param);
 			if ($output === 'rss' && !$token_is_ok) {
@@ -20,7 +20,7 @@ class FreshRSS_index_Controller extends Minz_ActionController {
 			} elseif ($output !== 'rss') {
 				// "hard" redirection is not required, just ask dispatcher to
 				// forward to the login form without 302 redirection
-				Minz_Request::forward(array('c' => 'index', 'a' => 'formLogin'));
+				Minz_Request::forward(array('c' => 'index', 'a' => 'login'));
 				return;
 			}
 		}
@@ -207,7 +207,7 @@ class FreshRSS_index_Controller extends Minz_ActionController {
 	}
 
 	public function logsAction() {
-		if (!$this->view->loginOk) {
+		if (!FreshRSS_Auth::hasAccess()) {
 			Minz_Error::error(
 				403,
 				array('error' => array(_t('access_denied')))
@@ -229,265 +229,91 @@ class FreshRSS_index_Controller extends Minz_ActionController {
 		$this->view->logsPaginator->_currentPage($page);
 	}
 
+	/**
+	 * This action handles the login page.
+	 */
 	public function loginAction() {
-		$this->view->_useLayout(false);
-
-		$url = 'https://verifier.login.persona.org/verify';
-		$assert = Minz_Request::param('assertion');
-		$params = 'assertion=' . $assert . '&audience=' .
-		          urlencode(Minz_Url::display(null, 'php', true));
-		$ch = curl_init();
-		$options = array(
-			CURLOPT_URL => $url,
-			CURLOPT_RETURNTRANSFER => TRUE,
-			CURLOPT_POST => 2,
-			CURLOPT_POSTFIELDS => $params
-		);
-		curl_setopt_array($ch, $options);
-		$result = curl_exec($ch);
-		curl_close($ch);
-
-		$res = json_decode($result, true);
-
-		$loginOk = false;
-		$reason = '';
-		if ($res['status'] === 'okay') {
-			$email = filter_var($res['email'], FILTER_VALIDATE_EMAIL);
-			if ($email != '') {
-				$personaFile = DATA_PATH . '/persona/' . $email . '.txt';
-				if (($currentUser = @file_get_contents($personaFile)) !== false) {
-					$currentUser = trim($currentUser);
-					if (ctype_alnum($currentUser)) {
-						try {
-							$this->conf = new FreshRSS_Configuration($currentUser);
-							$loginOk = strcasecmp($email, $this->conf->mail_login) === 0;
-						} catch (Minz_Exception $e) {
-							$reason = 'Invalid configuration for user [' . $currentUser . ']! ' . $e->getMessage();	//Permission denied or conf file does not exist
-						}
-					} else {
-						$reason = 'Invalid username format [' . $currentUser . ']!';
-					}
-				}
-			} else {
-				$reason = 'Invalid email format [' . $res['email'] . ']!';
-			}
-		}
-		if ($loginOk) {
-			Minz_Session::_param('currentUser', $currentUser);
-			Minz_Session::_param('mail', $email);
-			$this->view->loginOk = true;
-			invalidateHttpCache();
-		} else {
-			$res = array();
-			$res['status'] = 'failure';
-			$res['reason'] = $reason == '' ? _t('invalid_login') : $reason;
-			Minz_Log::warning('Persona: ' . $res['reason']);
+		if (FreshRSS_Auth::hasAccess()) {
+			Minz_Request::forward(array('c' => 'index', 'a' => 'index'), true);
 		}
 
-		header('Content-Type: application/json; charset=UTF-8');
-		$this->view->res = json_encode($res);
-	}
-
-	public function logoutAction() {
-		$this->view->_useLayout(false);
 		invalidateHttpCache();
-		Minz_Session::_param('currentUser');
-		Minz_Session::_param('mail');
-		Minz_Session::_param('passwordHash');
-	}
-
-	private static function makeLongTermCookie($username, $passwordHash) {
-		do {
-			$token = sha1(Minz_Configuration::salt() . $username . uniqid(mt_rand(), true));
-			$tokenFile = DATA_PATH . '/tokens/' . $token . '.txt';
-		} while (file_exists($tokenFile));
-		if (@file_put_contents($tokenFile, $username . "\t" . $passwordHash) === false) {
-			return false;
-		}
-		$expire = time() + 2629744;	//1 month	//TODO: Use a configuration instead
-		Minz_Session::setLongTermCookie('FreshRSS_login', $token, $expire);
-		Minz_Session::_param('token', $token);
-		return $token;
-	}
-
-	private static function deleteLongTermCookie() {
-		Minz_Session::deleteLongTermCookie('FreshRSS_login');
-		$token = Minz_Session::param('token', null);
-		if (ctype_alnum($token)) {
-			@unlink(DATA_PATH . '/tokens/' . $token . '.txt');
-		}
-		Minz_Session::_param('token');
-		if (rand(0, 10) === 1) {
-			self::purgeTokens();
-		}
-	}
 
-	private static function purgeTokens() {
-		$oldest = time() - 2629744;	//1 month	//TODO: Use a configuration instead
-		foreach (new DirectoryIterator(DATA_PATH . '/tokens/') as $fileInfo) {
-			if ($fileInfo->getExtension() === 'txt' && $fileInfo->getMTime() < $oldest) {
-				@unlink($fileInfo->getPathname());
-			}
+		$auth_type = Minz_Configuration::authType();
+		switch ($auth_type) {
+		case 'form':
+			Minz_Request::forward(array('c' => 'index', 'a' => 'formLogin'));
+			break;
+		case 'http_auth':
+		case 'none':
+			// It should not happened!
+			Minz_Error::error(404);
+		default:
+			// TODO load plugin instead
+			Minz_Error::error(404);
 		}
 	}
 
+	/**
+	 *
+	 */
 	public function formLoginAction() {
-		if ($this->view->loginOk) {
+		if (FreshRSS_Auth::hasAccess()) {
 			Minz_Request::forward(array('c' => 'index', 'a' => 'index'), true);
 		}
 
-		if (Minz_Request::isPost()) {
-			$ok = false;
-			$nonce = Minz_Session::param('nonce');
-			$username = Minz_Request::param('username', '');
-			$c = Minz_Request::param('challenge', '');
-			if (ctype_alnum($username) && ctype_graph($c) && ctype_alnum($nonce)) {
-				if (!function_exists('password_verify')) {
-					include_once(LIB_PATH . '/password_compat.php');
-				}
-				try {
-					$conf = new FreshRSS_Configuration($username);
-					$s = $conf->passwordHash;
-					$ok = password_verify($nonce . $s, $c);
-					if ($ok) {
-						Minz_Session::_param('currentUser', $username);
-						Minz_Session::_param('passwordHash', $s);
-						if (Minz_Request::param('keep_logged_in', false)) {
-							self::makeLongTermCookie($username, $s);
-						} else {
-							self::deleteLongTermCookie();
-						}
-					} else {
-						Minz_Log::warning('Password mismatch for user ' . $username . ', nonce=' . $nonce . ', c=' . $c);
-					}
-				} catch (Minz_Exception $me) {
-					Minz_Log::warning('Login failure: ' . $me->getMessage());
-				}
-			} else {
-				Minz_Log::debug('Invalid credential parameters: user=' . $username . ' challenge=' . $c . ' nonce=' . $nonce);
-			}
-			if (!$ok) {
-				$notif = array(
-					'type' => 'bad',
-					'content' => _t('invalid_login')
-				);
-				Minz_Session::_param('notification', $notif);
-			}
-			$this->view->_useLayout(false);
-			Minz_Request::forward(array('c' => 'index', 'a' => 'index'), true);
-		} elseif (Minz_Configuration::unsafeAutologinEnabled() && isset($_GET['u']) && isset($_GET['p'])) {
-			Minz_Session::_param('currentUser');
-			Minz_Session::_param('mail');
-			Minz_Session::_param('passwordHash');
-			$username = ctype_alnum($_GET['u']) ? $_GET['u'] : '';
-			$passwordPlain = $_GET['p'];
-			Minz_Request::_param('p');	//Discard plain-text password ASAP
-			$_GET['p'] = '';
-			if (!function_exists('password_verify')) {
-				include_once(LIB_PATH . '/password_compat.php');
-			}
-			try {
-				$conf = new FreshRSS_Configuration($username);
-				$s = $conf->passwordHash;
-				$ok = password_verify($passwordPlain, $s);
-				unset($passwordPlain);
-				if ($ok) {
-					Minz_Session::_param('currentUser', $username);
-					Minz_Session::_param('passwordHash', $s);
-				} else {
-					Minz_Log::warning('Unsafe password mismatch for user ' . $username);
-				}
-			} catch (Minz_Exception $me) {
-				Minz_Log::warning('Unsafe login failure: ' . $me->getMessage());
-			}
-			Minz_Request::forward(array('c' => 'index', 'a' => 'index'), true);
-		} elseif (!Minz_Configuration::canLogIn()) {
-			Minz_Error::error(
-				403,
-				array('error' => array(_t('access_denied')))
-			);
-		}
 		invalidateHttpCache();
-	}
 
-	public function formLogoutAction() {
-		$this->view->_useLayout(false);
-		invalidateHttpCache();
-		Minz_Session::_param('currentUser');
-		Minz_Session::_param('mail');
-		Minz_Session::_param('passwordHash');
-		self::deleteLongTermCookie();
-		Minz_Request::forward(array('c' => 'index', 'a' => 'index'), true);
-	}
-
-	public function resetAuthAction() {
-		Minz_View::prependTitle(_t('auth_reset') . ' · ');
-		Minz_View::appendScript(Minz_Url::display(
-			'/scripts/bcrypt.min.js?' . @filemtime(PUBLIC_PATH . '/scripts/bcrypt.min.js')
-		));
-
-		$this->view->no_form = false;
-		// Enable changement of auth only if Persona!
-		if (Minz_Configuration::authType() != 'persona') {
-			$this->view->message = array(
-				'status' => 'bad',
-				'title' => _t('damn'),
-				'body' => _t('auth_not_persona')
-			);
-			$this->view->no_form = true;
-			return;
-		}
-
-		$conf = new FreshRSS_Configuration(Minz_Configuration::defaultUser());
-		// Admin user must have set its master password.
-		if (!$conf->passwordHash) {
-			$this->view->message = array(
-				'status' => 'bad',
-				'title' => _t('damn'),
-				'body' => _t('auth_no_password_set')
-			);
-			$this->view->no_form = true;
-			return;
-		}
-
-		invalidateHttpCache();
+		$file_mtime = @filemtime(PUBLIC_PATH . '/scripts/bcrypt.min.js');
+		Minz_View::appendScript(Minz_Url::display('/scripts/bcrypt.min.js?' . $file_mtime));
 
 		if (Minz_Request::isPost()) {
 			$nonce = Minz_Session::param('nonce');
 			$username = Minz_Request::param('username', '');
-			$c = Minz_Request::param('challenge', '');
-			if (!(ctype_alnum($username) && ctype_graph($c) && ctype_alnum($nonce))) {
-				Minz_Log::debug('Invalid credential parameters:' .
-				                ' user=' . $username .
-				                ' challenge=' . $c .
-				                ' nonce=' . $nonce);
+			$challenge = Minz_Request::param('challenge', '');
+			try {
+				$conf = new FreshRSS_Configuration($username);
+			} catch(Minz_Exception $e) {
+				// $username is not a valid user, nor the configuration file!
+				Minz_Log::warning('Login failure: ' . $e->getMessage());
 				Minz_Request::bad(_t('invalid_login'),
-				                  array('c' => 'index', 'a' => 'resetAuth'));
-			}
-
-			if (!function_exists('password_verify')) {
-				include_once(LIB_PATH . '/password_compat.php');
+				                  array('c' => 'index', 'a' => 'login'));
 			}
 
-			$s = $conf->passwordHash;
-			$ok = password_verify($nonce . $s, $c);
+			$ok = FreshRSS_FormAuth::checkCredentials(
+				$username, $conf->passwordHash, $nonce, $challenge
+			);
 			if ($ok) {
-				Minz_Configuration::_authType('form');
-				$ok = Minz_Configuration::writeFile();
-
-				if ($ok) {
-					Minz_Request::good(_t('auth_form_set'));
+				// Set session parameter to give access to the user.
+				Minz_Session::_param('currentUser', $username);
+				Minz_Session::_param('passwordHash', $conf->passwordHash);
+				FreshRSS_Auth::giveAccess();
+
+				// Set cookie parameter if nedded.
+				if (Minz_Request::param('keep_logged_in', false)) {
+					FreshRSS_FormAuth::makeCookie($username, $conf->passwordHash);
 				} else {
-					Minz_Request::bad(_t('auth_form_not_set'),
-				                      array('c' => 'index', 'a' => 'resetAuth'));
+					FreshRSS_FormAuth::deleteCookie();
 				}
-			} else {
-				Minz_Log::debug('Password mismatch for user ' . $username .
-				                ', nonce=' . $nonce . ', c=' . $c);
 
+				// All is good, go back to the index.
+				Minz_Request::good(_t('login'),
+				                   array('c' => 'index', 'a' => 'index'));
+			} else {
+				Minz_Log::warning('Password mismatch for' .
+				                  ' user=' . $username .
+				                  ', nonce=' . $nonce .
+				                  ', c=' . $challenge);
 				Minz_Request::bad(_t('invalid_login'),
-				                  array('c' => 'index', 'a' => 'resetAuth'));
+				                  array('c' => 'index', 'a' => 'login'));
 			}
 		}
 	}
+
+	public function logoutAction() {
+		invalidateHttpCache();
+		FreshRSS_Auth::removeAccess();
+		Minz_Request::good(_t('disconnected'),
+		                   array('c' => 'index', 'a' => 'index'));
+	}
 }
diff --git a/app/Controllers/statsController.php b/app/Controllers/statsController.php
index 99c57c809..0e3430fcc 100644
--- a/app/Controllers/statsController.php
+++ b/app/Controllers/statsController.php
@@ -118,7 +118,7 @@ class FreshRSS_stats_Controller extends Minz_ActionController {
 	 * underlying framework.
 	 */
 	public function firstAction() {
-		if (!$this->view->loginOk) {
+		if (!FreshRSS_Auth::hasAccess()) {
 			Minz_Error::error(
 			    403, array('error' => array(_t('access_denied')))
 			);
diff --git a/app/Controllers/subscriptionController.php b/app/Controllers/subscriptionController.php
index 7cc8179a0..a89168eb3 100644
--- a/app/Controllers/subscriptionController.php
+++ b/app/Controllers/subscriptionController.php
@@ -10,7 +10,7 @@ class FreshRSS_subscription_Controller extends Minz_ActionController {
 	 * underlying framework.
 	 */
 	public function firstAction() {
-		if (!$this->view->loginOk) {
+		if (!FreshRSS_Auth::hasAccess()) {
 			Minz_Error::error(
 				403,
 				array('error' => array(_t('access_denied')))
diff --git a/app/Controllers/updateController.php b/app/Controllers/updateController.php
index da5bddc65..9da1e8657 100644
--- a/app/Controllers/updateController.php
+++ b/app/Controllers/updateController.php
@@ -3,7 +3,7 @@
 class FreshRSS_update_Controller extends Minz_ActionController {
 	public function firstAction() {
 		$current_user = Minz_Session::param('currentUser', '');
-		if (!$this->view->loginOk && Minz_Configuration::isAdmin($current_user)) {
+		if (!FreshRSS_Auth::hasAccess() && Minz_Configuration::isAdmin($current_user)) {
 			Minz_Error::error(
 				403,
 				array('error' => array(_t('access_denied')))
diff --git a/app/Controllers/usersController.php b/app/Controllers/usersController.php
index 7d0171bc7..c2b1d163f 100644
--- a/app/Controllers/usersController.php
+++ b/app/Controllers/usersController.php
@@ -5,7 +5,7 @@ class FreshRSS_users_Controller extends Minz_ActionController {
 	const BCRYPT_COST = 9;	//Will also have to be computed client side on mobile devices, so do not use a too high cost
 
 	public function firstAction() {
-		if (!$this->view->loginOk) {
+		if (!FreshRSS_Auth::hasAccess()) {
 			Minz_Error::error(
 				403,
 				array('error' => array(_t('access_denied')))
diff --git a/app/FreshRSS.php b/app/FreshRSS.php
index efd302ecc..35a37b887 100644
--- a/app/FreshRSS.php
+++ b/app/FreshRSS.php
@@ -4,130 +4,33 @@ class FreshRSS extends Minz_FrontController {
 		if (!isset($_SESSION)) {
 			Minz_Session::init('FreshRSS');
 		}
-		$loginOk = $this->accessControl(Minz_Session::param('currentUser', ''));
+
+		FreshRSS_Auth::init();
+		$this->loadConfiguration();
 		$this->loadParamsView();
 		if (Minz_Request::isPost() && !is_referer_from_same_domain()) {
-			$loginOk = false;	//Basic protection against XSRF attacks
+			//Basic protection against XSRF attacks
+			FreshRSS_Auth::removeAccess();
 			Minz_Error::error(
 				403,
 				array('error' => array(_t('access_denied') . ' [HTTP_REFERER=' .
-					htmlspecialchars(empty($_SERVER['HTTP_REFERER']) ? '' : $_SERVER['HTTP_REFERER']) . ']'))
+				      htmlspecialchars(empty($_SERVER['HTTP_REFERER']) ? '' : $_SERVER['HTTP_REFERER']) . ']'))
 			);
 		}
-		Minz_View::_param('loginOk', $loginOk);
-		$this->loadStylesAndScripts($loginOk);	//TODO: Do not load that when not needed, e.g. some Ajax requests
+		$this->loadStylesAndScripts();
 		$this->loadNotifications();
 		$this->loadExtensions();
 	}
 
-	private static function getCredentialsFromLongTermCookie() {
-		$token = Minz_Session::getLongTermCookie('FreshRSS_login');
-		if (!ctype_alnum($token)) {
-			return array();
-		}
-		$tokenFile = DATA_PATH . '/tokens/' . $token . '.txt';
-		$mtime = @filemtime($tokenFile);
-		if ($mtime + 2629744 < time()) {	//1 month	//TODO: Use a configuration instead
-			@unlink($tokenFile);
-			return array(); 	//Expired or token does not exist
-		}
-		$credentials = @file_get_contents($tokenFile);
-		return $credentials === false ? array() : explode("\t", $credentials, 2);
-	}
-
-	private function accessControl($currentUser) {
-		if ($currentUser == '') {
-			switch (Minz_Configuration::authType()) {
-				case 'form':
-					$credentials = self::getCredentialsFromLongTermCookie();
-					if (isset($credentials[1])) {
-						$currentUser = trim($credentials[0]);
-						Minz_Session::_param('passwordHash', trim($credentials[1]));
-					}
-					$loginOk = $currentUser != '';
-					if (!$loginOk) {
-						$currentUser = Minz_Configuration::defaultUser();
-						Minz_Session::_param('passwordHash');
-					}
-					break;
-				case 'http_auth':
-					$currentUser = httpAuthUser();
-					$loginOk = $currentUser != '';
-					break;
-				case 'persona':
-					$loginOk = false;
-					$email = filter_var(Minz_Session::param('mail'), FILTER_VALIDATE_EMAIL);
-					if ($email != '') {	//TODO: Remove redundancy with indexController
-						$personaFile = DATA_PATH . '/persona/' . $email . '.txt';
-						if (($currentUser = @file_get_contents($personaFile)) !== false) {
-							$currentUser = trim($currentUser);
-							$loginOk = true;
-						}
-					}
-					if (!$loginOk) {
-						$currentUser = Minz_Configuration::defaultUser();
-					}
-					break;
-				case 'none':
-					$currentUser = Minz_Configuration::defaultUser();
-					$loginOk = true;
-					break;
-				default:
-					$currentUser = Minz_Configuration::defaultUser();
-					$loginOk = false;
-					break;
-			}
-		} else {
-			$loginOk = true;
-		}
-
-		if (!ctype_alnum($currentUser)) {
-			Minz_Session::_param('currentUser', '');
-			die('Invalid username [' . $currentUser . ']!');
-		}
-
+	private function loadConfiguration() {
+		$current_user = Minz_Session::param('currentUser');
 		try {
-			$this->conf = new FreshRSS_Configuration($currentUser);
+			$this->conf = new FreshRSS_Configuration($current_user);
 			Minz_View::_param('conf', $this->conf);
-			Minz_Session::_param('currentUser', $currentUser);
-		} catch (Minz_Exception $me) {
-			$loginOk = false;
-			try {
-				$this->conf = new FreshRSS_Configuration(Minz_Configuration::defaultUser());
-				Minz_Session::_param('currentUser', Minz_Configuration::defaultUser());
-				Minz_View::_param('conf', $this->conf);
-				$notif = array(
-					'type' => 'bad',
-					'content' => 'Invalid configuration for user [' . $currentUser . ']!',
-				);
-				Minz_Session::_param('notification', $notif);
-				Minz_Log::warning($notif['content'] . ' ' . $me->getMessage());
-				Minz_Session::_param('currentUser', '');
-			} catch (Exception $e) {
-				die($e->getMessage());
-			}
-		}
-
-		if ($loginOk) {
-			switch (Minz_Configuration::authType()) {
-				case 'form':
-					$loginOk = Minz_Session::param('passwordHash') === $this->conf->passwordHash;
-					break;
-				case 'http_auth':
-					$loginOk = strcasecmp($currentUser, httpAuthUser()) === 0;
-					break;
-				case 'persona':
-					$loginOk = strcasecmp(Minz_Session::param('mail'), $this->conf->mail_login) === 0;
-					break;
-				case 'none':
-					$loginOk = true;
-					break;
-				default:
-					$loginOk = false;
-					break;
-			}
+		} catch(Minz_Exception $e) {
+			Minz_Log::error('Cannot load configuration file of user `' . $current_user . '`');
+			die($e->getMessage());
 		}
-		return $loginOk;
 	}
 
 	private function loadParamsView() {
@@ -140,7 +43,7 @@ class FreshRSS extends Minz_FrontController {
 		}
 	}
 
-	private function loadStylesAndScripts($loginOk) {
+	private function loadStylesAndScripts() {
 		$theme = FreshRSS_Themes::load($this->conf->theme);
 		if ($theme) {
 			foreach($theme['files'] as $file) {
@@ -158,16 +61,6 @@ class FreshRSS extends Minz_FrontController {
 			}
 		}
 
-		switch (Minz_Configuration::authType()) {
-			case 'form':
-				if (!$loginOk) {
-					Minz_View::appendScript(Minz_Url::display('/scripts/bcrypt.min.js?' . @filemtime(PUBLIC_PATH . '/scripts/bcrypt.min.js')));
-				}
-				break;
-			case 'persona':
-				Minz_View::appendScript('https://login.persona.org/include.js');
-				break;
-		}
 		Minz_View::appendScript(Minz_Url::display('/scripts/jquery.min.js?' . @filemtime(PUBLIC_PATH . '/scripts/jquery.min.js')));
 		Minz_View::appendScript(Minz_Url::display('/scripts/shortcut.js?' . @filemtime(PUBLIC_PATH . '/scripts/shortcut.js')));
 		Minz_View::appendScript(Minz_Url::display('/scripts/main.js?' . @filemtime(PUBLIC_PATH . '/scripts/main.js')));
diff --git a/app/Models/Auth.php b/app/Models/Auth.php
new file mode 100644
index 000000000..c4a3abd98
--- /dev/null
+++ b/app/Models/Auth.php
@@ -0,0 +1,209 @@
+<?php
+
+/**
+ * This class handles all authentication process.
+ */
+class FreshRSS_Auth {
+	/**
+	 * Determines if user is connected.
+	 */
+	private static $login_ok = false;
+
+	/**
+	 * This method initializes authentication system.
+	 */
+	public static function init() {
+		self::$login_ok = Minz_Session::param('loginOk', false);
+		$current_user = Minz_Session::param('currentUser', '');
+		if ($current_user === '') {
+			$current_user = Minz_Configuration::defaultUser();
+			Minz_Session::_param('currentUser', $current_user);
+		}
+
+		$access_ok = self::accessControl($current_user);
+
+		if ($access_ok) {
+			self::giveAccess();
+		} else {
+			// Be sure all accesses are removed!
+			self::removeAccess();
+		}
+	}
+
+	/**
+	 * This method checks if user is allowed to connect.
+	 *
+	 * Required session parameters are also set in this method (such as
+	 * currentUser).
+	 *
+	 * @param string $username username of the user to check access.
+	 * @return boolean true if user can be connected, false else.
+	 */
+	public static function accessControl($username) {
+		if (self::$login_ok) {
+			return true;
+		}
+
+		switch (Minz_Configuration::authType()) {
+		case 'form':
+			$credentials = FreshRSS_FormAuth::getCredentialsFromCookie();
+			$current_user = '';
+			if (isset($credentials[1])) {
+				$current_user = trim($credentials[0]);
+				Minz_Session::_param('currentUser', $current_user);
+				Minz_Session::_param('passwordHash', trim($credentials[1]));
+			}
+			return $current_user != '';
+		case 'http_auth':
+			$current_user = httpAuthUser();
+			$login_ok = $current_user != '';
+			if ($login_ok) {
+				Minz_Session::_param('currentUser', $current_user);
+			}
+			return $login_ok;
+		case 'none':
+			return true;
+		default:
+			// TODO load extension
+			return false;
+		}
+	}
+
+	/**
+	 * Gives access to the current user.
+	 */
+	public static function giveAccess() {
+		$current_user = Minz_Session::param('currentUser');
+		try {
+			$conf = new FreshRSS_Configuration($current_user);
+		} catch(Minz_Exception $e) {
+			die($e->getMessage());
+		}
+
+		switch (Minz_Configuration::authType()) {
+		case 'form':
+			self::$login_ok = Minz_Session::param('passwordHash') === $conf->passwordHash;
+			break;
+		case 'http_auth':
+			self::$login_ok = strcasecmp($current_user, httpAuthUser()) === 0;
+			break;
+		case 'none':
+			self::$login_ok = true;
+			break;
+		default:
+			// TODO: extensions
+			self::$login_ok = false;
+		}
+
+		Minz_Session::_param('loginOk', self::$login_ok);
+	}
+
+	/**
+	 * Returns if current user is connected.
+	 *
+	 * @return boolean true if user is connected, false else.
+	 */
+	public static function hasAccess() {
+		return self::$login_ok;
+	}
+
+	/**
+	 * Removes all accesses for the current user.
+	 */
+	public static function removeAccess() {
+		Minz_Session::_param('loginOk');
+		self::$login_ok = false;
+		Minz_Session::_param('currentUser', Minz_Configuration::defaultUser());
+
+		switch (Minz_Configuration::authType()) {
+		case 'form':
+			Minz_Session::_param('passwordHash');
+			FreshRSS_FormAuth::deleteCookie();
+			break;
+		case 'http_auth':
+		case 'none':
+			// Nothing to do...
+			break;
+		default:
+			// TODO: extensions
+		}
+	}
+}
+
+
+class FreshRSS_FormAuth {
+	public static function checkCredentials($username, $hash, $nonce, $challenge) {
+		if (!ctype_alnum($username) ||
+				!ctype_graph($challenge) ||
+				!ctype_alnum($nonce)) {
+			Minz_Log::debug('Invalid credential parameters:' .
+			                ' user=' . $username .
+			                ' challenge=' . $challenge .
+			                ' nonce=' . $nonce);
+			return false;
+		}
+
+		if (!function_exists('password_verify')) {
+			include_once(LIB_PATH . '/password_compat.php');
+		}
+
+		return password_verify($nonce . $hash, $challenge);
+	}
+
+	public static function getCredentialsFromCookie() {
+		$token = Minz_Session::getLongTermCookie('FreshRSS_login');
+		if (!ctype_alnum($token)) {
+			return array();
+		}
+
+		$token_file = DATA_PATH . '/tokens/' . $token . '.txt';
+		$mtime = @filemtime($token_file);
+		if ($mtime + 2629744 < time()) {
+			// Token has expired (> 1 month) or does not exist.
+			// TODO: 1 month -> use a configuration instead
+			@unlink($token_file);
+			return array(); 	
+		}
+
+		$credentials = @file_get_contents($token_file);
+		return $credentials === false ? array() : explode("\t", $credentials, 2);
+	}
+
+	public static function makeCookie($username, $password_hash) {
+		do {
+			$token = sha1(Minz_Configuration::salt() . $username . uniqid(mt_rand(), true));
+			$token_file = DATA_PATH . '/tokens/' . $token . '.txt';
+		} while (file_exists($token_file));
+
+		if (@file_put_contents($token_file, $username . "\t" . $password_hash) === false) {
+			return false;
+		}
+
+		$expire = time() + 2629744;	//1 month	//TODO: Use a configuration instead
+		Minz_Session::setLongTermCookie('FreshRSS_login', $token, $expire);
+		return $token;
+	}
+
+	public static function deleteCookie() {
+		$token = Minz_Session::getLongTermCookie('FreshRSS_login');
+		Minz_Session::deleteLongTermCookie('FreshRSS_login');
+		if (ctype_alnum($token)) {
+			@unlink(DATA_PATH . '/tokens/' . $token . '.txt');
+		}
+
+		if (rand(0, 10) === 1) {
+			self::purgeTokens();
+		}
+	}
+
+	public static function purgeTokens() {
+		$oldest = time() - 2629744;	// 1 month	// TODO: Use a configuration instead
+		foreach (new DirectoryIterator(DATA_PATH . '/tokens/') as $file_info) {
+			// $extension = $file_info->getExtension(); doesn't work in PHP < 5.3.7
+			$extension = pathinfo($file_info->getFilename(), PATHINFO_EXTENSION);
+			if ($extension === 'txt' && $file_info->getMTime() < $oldest) {
+				@unlink($file_info->getPathname());
+			}
+		}
+	}
+}
diff --git a/app/layout/aside_flux.phtml b/app/layout/aside_flux.phtml
index a8ae2f424..a66be2ed9 100644
--- a/app/layout/aside_flux.phtml
+++ b/app/layout/aside_flux.phtml
@@ -2,7 +2,7 @@
 	<a class="toggle_aside" href="#close"><?php echo _i('close'); ?></a>
 
 	<ul class="categories">
-		<?php if ($this->loginOk) { ?>
+		<?php if (FreshRSS_Auth::hasAccess()) { ?>
 		<form id="mark-read-aside" method="post" style="display: none"></form>
 
 		<li>
@@ -83,11 +83,11 @@
 	<ul class="dropdown-menu">
 		<li class="dropdown-close"><a href="#close">❌</a></li>
 		<li class="item"><a href="<?php echo _url('index', 'index', 'get', 'f_!!!!!!'); ?>"><?php echo _t('filter'); ?></a></li>
-		<?php if ($this->loginOk) { ?>
+		<?php if (FreshRSS_Auth::hasAccess()) { ?>
 		<li class="item"><a href="<?php echo _url('stats', 'repartition', 'id', '!!!!!!'); ?>"><?php echo _t('stats'); ?></a></li>
 		<?php } ?>
 		<li class="item"><a target="_blank" href="http://example.net/"><?php echo _t('see_website'); ?></a></li>
-		<?php if ($this->loginOk) { ?>
+		<?php if (FreshRSS_Auth::hasAccess()) { ?>
 		<li class="separator"></li>
 		<li class="item"><a href="<?php echo _url('subscription', 'index', 'id', '!!!!!!'); ?>"><?php echo _t('administration'); ?></a></li>
 		<li class="item"><a href="<?php echo _url('feed', 'actualize', 'id', '!!!!!!'); ?>"><?php echo _t('actualize'); ?></a></li>
diff --git a/app/layout/header.phtml b/app/layout/header.phtml
index 4b571ef06..fadfd13d7 100644
--- a/app/layout/header.phtml
+++ b/app/layout/header.phtml
@@ -1,22 +1,11 @@
 <?php
 if (Minz_Configuration::canLogIn()) {
 	?><ul class="nav nav-head nav-login"><?php
-	switch (Minz_Configuration::authType()) {
-	case 'form':
-		if ($this->loginOk) {
-			?><li class="item"><?php echo _i('logout'); ?> <a class="signout" href="<?php echo _url('index', 'formLogout'); ?>"><?php echo _t('logout'); ?></a></li><?php
+		if (FreshRSS_Auth::hasAccess()) {
+			?><li class="item"><?php echo _i('logout'); ?> <a class="signout" href="<?php echo _url('index', 'logout'); ?>"><?php echo _t('logout'); ?></a></li><?php
 		} else {
-			?><li class="item"><?php echo _i('login'); ?> <a class="signin" href="<?php echo _url('index', 'formLogin'); ?>"><?php echo _t('login'); ?></a></li><?php
+			?><li class="item"><?php echo _i('login'); ?> <a class="signin" href="<?php echo _url('index', 'login'); ?>"><?php echo _t('login'); ?></a></li><?php
 		}
-		break;
-	case 'persona':
-		if ($this->loginOk) {
-			?><li class="item"><?php echo _i('logout'); ?> <a class="signout" href="#"><?php echo _t('logout'); ?></a></li><?php
-		} else {
-			?><li class="item"><?php echo _i('login'); ?> <a class="signin" href="#"><?php echo _t('login'); ?></a></li><?php
-		}
-		break;
-	}
 	?></ul><?php
 }
 ?>
@@ -32,7 +21,7 @@ if (Minz_Configuration::canLogIn()) {
 	</div>
 
 	<div class="item search">
-		<?php if ($this->loginOk || Minz_Configuration::allowAnonymous()) { ?>
+		<?php if (FreshRSS_Auth::hasAccess() || Minz_Configuration::allowAnonymous()) { ?>
 		<form action="<?php echo _url('index', 'index'); ?>" method="get">
 			<div class="stick">
 				<?php $search = Minz_Request::param('search', ''); ?>
@@ -59,7 +48,7 @@ if (Minz_Configuration::canLogIn()) {
 		<?php } ?>
 	</div>
 
-	<?php if ($this->loginOk) { ?>
+	<?php if (FreshRSS_Auth::hasAccess()) { ?>
 	<div class="item configure">
 		<div class="dropdown">
 			<div id="dropdown-configure" class="dropdown-target"></div>
@@ -87,15 +76,8 @@ if (Minz_Configuration::canLogIn()) {
 				<li class="item"><a href="<?php echo _url('index', 'about'); ?>"><?php echo _t('about'); ?></a></li>
 				<?php
 				if (Minz_Configuration::canLogIn()) {
-					?><li class="separator"></li><?php
-					switch (Minz_Configuration::authType()) {
-					case 'form':
-						?><li class="item"><a class="signout" href="<?php echo _url('index', 'formLogout'); ?>"><?php echo _i('logout'), ' ', _t('logout'); ?></a></li><?php
-						break;
-					case 'persona':
-						?><li class="item"><a class="signout" href="#"><?php echo _i('logout'), ' ', _t('logout'); ?></a></li><?php
-						break;
-					}
+					?><li class="separator"></li>
+				<li class="item"><a class="signout" href="<?php echo _url('index', 'logout'); ?>"><?php echo _i('logout'), ' ', _t('logout'); ?></a></li><?php
 				} ?>
 			</ul>
 		</div>
diff --git a/app/layout/nav_menu.phtml b/app/layout/nav_menu.phtml
index a9e6614e7..090b55785 100644
--- a/app/layout/nav_menu.phtml
+++ b/app/layout/nav_menu.phtml
@@ -6,7 +6,7 @@
 	<a class="btn toggle_aside" href="#aside_flux"><?php echo _i('category'); ?></a>
 	<?php } ?>
 
-	<?php if ($this->loginOk) { ?>
+	<?php if (FreshRSS_Auth::hasAccess()) { ?>
 	<div id="nav_menu_actions" class="stick">
 		<?php
 			$url_state = $this->url;
@@ -300,7 +300,7 @@
 		<?php echo _i($icon); ?>
 	</a>
 	
-	<?php if ($this->loginOk || Minz_Configuration::allowAnonymousRefresh()) { ?>
+	<?php if (FreshRSS_Auth::hasAccess() || Minz_Configuration::allowAnonymousRefresh()) { ?>
 	<a id="actualize" class="btn" href="<?php echo _url('feed', 'actualize'); ?>"><?php echo _i('refresh'); ?></a>
 	<?php } ?>
 </div>
diff --git a/app/views/helpers/view/normal_view.phtml b/app/views/helpers/view/normal_view.phtml
index 109fad0eb..db25714bb 100644
--- a/app/views/helpers/view/normal_view.phtml
+++ b/app/views/helpers/view/normal_view.phtml
@@ -7,7 +7,7 @@ if (!empty($this->entries)) {
 	$display_today = true;
 	$display_yesterday = true;
 	$display_others = true;
-	if ($this->loginOk) {
+	if (FreshRSS_Auth::hasAccess()) {
 		$sharing = $this->conf->sharing;
 	} else {
 		$sharing = array();
@@ -58,7 +58,7 @@ if (!empty($this->entries)) {
 		}
 	?><div class="flux<?php echo !$item->isRead() ? ' not_read' : ''; ?><?php echo $item->isFavorite() ? ' favorite' : ''; ?>" id="flux_<?php echo $item->id(); ?>">
 		<ul class="horizontal-list flux_header"><?php
-			if ($this->loginOk) {
+			if (FreshRSS_Auth::hasAccess()) {
 				if ($topline_read) {
 					?><li class="item manage"><?php
 						$arUrl = array('c' => 'entry', 'a' => 'read', 'params' => array('id' => $item->id()));
@@ -103,7 +103,7 @@ if (!empty($this->entries)) {
 				?>
 			</div>
 			<ul class="horizontal-list bottom"><?php
-				if ($this->loginOk) {
+				if (FreshRSS_Auth::hasAccess()) {
 					if ($bottomline_read) {
 						?><li class="item manage"><?php
 							$arUrl = array('c' => 'entry', 'a' => 'read', 'params' => array('id' => $item->id()));
diff --git a/app/views/index/index.phtml b/app/views/index/index.phtml
index 584792e29..a59063557 100644
--- a/app/views/index/index.phtml
+++ b/app/views/index/index.phtml
@@ -2,7 +2,7 @@
 
 $output = Minz_Request::param('output', 'normal');
 
-if ($this->loginOk || Minz_Configuration::allowAnonymous()) {
+if (FreshRSS_Auth::hasAccess() || Minz_Configuration::allowAnonymous()) {
 	if ($output === 'normal') {
 		$this->renderHelper('view/normal_view');
 	} elseif ($output === 'reader') {
diff --git a/app/views/index/login.phtml b/app/views/index/login.phtml
deleted file mode 100644
index 79fbe9d21..000000000
--- a/app/views/index/login.phtml
+++ /dev/null
@@ -1 +0,0 @@
-<?php print_r($this->res); ?>
diff --git a/app/views/index/logout.phtml b/app/views/index/logout.phtml
deleted file mode 100644
index a0aba9318..000000000
--- a/app/views/index/logout.phtml
+++ /dev/null
@@ -1 +0,0 @@
-OK
\ No newline at end of file
diff --git a/app/views/index/resetAuth.phtml b/app/views/index/resetAuth.phtml
deleted file mode 100644
index 6d4282c14..000000000
--- a/app/views/index/resetAuth.phtml
+++ /dev/null
@@ -1,33 +0,0 @@
-<div class="prompt">
-	<h1><?php echo _t('auth_reset'); ?></h1>
-
-	<?php if (!empty($this->message)) { ?>
-	<p class="alert <?php echo $this->message['status'] === 'bad' ? 'alert-error' : 'alert-warn'; ?>">
-		<span class="alert-head"><?php echo $this->message['title']; ?></span><br />
-		<?php echo $this->message['body']; ?>
-	</p>
-	<?php } ?>
-
-	<?php if (!$this->no_form) { ?>
-	<form id="crypto-form" method="post" action="<?php echo _url('index', 'resetAuth'); ?>">
-		<p class="alert alert-warn">
-			<span class="alert-head"><?php echo _t('attention'); ?></span><br />
-			<?php echo _t('auth_will_reset'); ?>
-		</p>
-
-		<div>
-			<label for="username"><?php echo _t('username_admin'); ?></label>
-			<input type="text" id="username" name="username" size="16" required="required" maxlength="16" pattern="[0-9a-zA-Z]{1,16}" autofocus="autofocus" />
-		</div>
-		<div>
-			<label for="passwordPlain"><?php echo _t('password'); ?></label>
-				<input type="password" id="passwordPlain" required="required" />
-				<input type="hidden" id="challenge" name="challenge" /><br />
-				<noscript><strong><?php echo _t('javascript_should_be_activated'); ?></strong></noscript>
-		</div>
-		<div>
-			<button id="loginButton" type="submit" class="btn btn-important"><?php echo _t('submit'); ?></button>
-		</div>
-	</form>
-	<?php } ?>
-</div>