<?php
/**
* @file src/Module/Login.php
*/
namespace Friendica\Module;
use Exception;
use Friendica\BaseModule;
use Friendica\Core\Authentication;
use Friendica\Core\Config;
use Friendica\Core\Hook;
use Friendica\Core\L10n;
use Friendica\Core\Logger;
use Friendica\Core\Renderer;
use Friendica\Core\Session;
use Friendica\Core\System;
use Friendica\Database\DBA;
use Friendica\Model\User;
use Friendica\Util\DateTimeFormat;
use Friendica\Util\Network;
use Friendica\Util\Strings;
use LightOpenID;
/**
* Login module
*
* @author Hypolite Petovan <hypolite@mrpetovan.com>
*/
class Login extends BaseModule
{
public static function content()
{
$a = self::getApp();
Session::remove('theme');
Session::remove('mobile-theme');
if (local_user()) {
$a->internalRedirect();
}
return self::form(Session::get('return_path'), intval(Config::get('config', 'register_policy')) !== \Friendica\Module\Register::CLOSED);
}
public static function post()
{
$return_path = Session::get('return_path');
session_unset();
Session::set('return_path', $return_path);
// OpenId Login
if (
empty($_POST['password'])
&& (
!empty($_POST['openid_url'])
|| !empty($_POST['username'])
)
) {
$openid_url = trim(defaults($_POST, 'openid_url', $_POST['username']));
self::openIdAuthentication($openid_url, !empty($_POST['remember']));
}
if (!empty($_POST['auth-params']) && $_POST['auth-params'] === 'login') {
self::passwordAuthentication(
trim($_POST['username']),
trim($_POST['password']),
!empty($_POST['remember'])
);
}
}
/**
* Attempts to authenticate using OpenId
*
* @param string $openid_url OpenID URL string
* @param bool $remember Whether to set the session remember flag
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
*/
private static function openIdAuthentication($openid_url, $remember)
{
$noid = Config::get('system', 'no_openid');
$a = self::getApp();
// if it's an email address or doesn't resolve to a URL, fail.
if ($noid || strpos($openid_url, '@') || !Network::isUrlValid($openid_url)) {
notice(L10n::t('Login failed.') . EOL);
$a->internalRedirect();
// NOTREACHED
}
// Otherwise it's probably an openid.
try {
$openid = new LightOpenID($a->getHostName());
$openid->identity = $openid_url;
$_SESSION['openid'] = $openid_url;
$_SESSION['remember'] = $remember;
$openid->returnUrl = $a->getBaseURL(true) . '/openid';
System::externalRedirect($openid->authUrl());
} catch (Exception $e) {
notice(L10n::t('We encountered a problem while logging in with the OpenID you provided. Please check the correct spelling of the ID.') . '<br /><br >' . L10n::t('The error message was:') . ' ' . $e->getMessage());
}
}
/**
* Attempts to authenticate using login/password
*
* @param string $username User name
* @param string $password Clear password
* @param bool $remember Whether to set the session remember flag
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
*/
private static function passwordAuthentication($username, $password, $remember)
{
$record = null;
$addon_auth = [
'username' => $username,
'password' => $password,
'authenticated' => 0,
'user_record' => null
];
$a = self::getApp();
/*
* An addon indicates successful login by setting 'authenticated' to non-zero value and returning a user record
* Addons should never set 'authenticated' except to indicate success - as hooks may be chained
* and later addons should not interfere with an earlier one that succeeded.
*/
Hook::callAll('authenticate', $addon_auth);
try {
if ($addon_auth['authenticated']) {
$record = $addon_auth['user_record'];
if (empty($record)) {
throw new Exception(L10n::t('Login failed.'));
}
} else {
$record = DBA::selectFirst('user', [],
['uid' => User::getIdFromPasswordAuthentication($username, $password)]
);
}
} catch (Exception $e) {
Logger::warning('authenticate: failed login attempt', ['action' => 'login', 'username' => Strings::escapeTags($username), 'ip' => $_SERVER['REMOTE_ADDR']]);
info('Login failed. Please check your credentials.' . EOL);
$a->internalRedirect();
}
if (!$remember) {
Authentication::setCookie(0); // 0 means delete on browser exit
}
// if we haven't failed up this point, log them in.
Session::set('remember', $remember);
Session::set('last_login_date', DateTimeFormat::utcNow());
Session::setAuthenticatedForUser($a, $record, true, true);
$return_path = Session::get('return_path', '');
Session::remove('return_path');
$a->internalRedirect($return_path);
}
/**
* @brief Tries to auth the user from the cookie or session
*
* @todo Should be moved to Friendica\Core\Session when it's created
*/
public static function sessionAuth()
{
$a = self::getApp();
// When the "Friendica" cookie is set, take the value to authenticate and renew the cookie.
if (isset($_COOKIE["Friendica"])) {
$data = json_decode($_COOKIE["Friendica"]);
if (isset($data->uid)) {
$user = DBA::selectFirst('user', [],
[
'uid' => $data->uid,
'blocked' => false,
'account_expired' => false,
'account_removed' => false,
'verified' => true,
]
);
if (DBA::isResult($user)) {
if ($data->hash != Authentication::getCookieHashForUser($user)) {
Logger::log("Hash for user " . $data->uid . " doesn't fit.");
Authentication::deleteSession();
$a->internalRedirect();
}
// Renew the cookie
// Expires after 7 days by default,
// can be set via system.auth_cookie_lifetime
$authcookiedays = Config::get('system', 'auth_cookie_lifetime', 7);
Authentication::setCookie($authcookiedays * 24 * 60 * 60, $user);
// Do the authentification if not done by now
if (!isset($_SESSION) || !isset($_SESSION['authenticated'])) {
Session::setAuthenticatedForUser($a, $user);
if (Config::get('system', 'paranoia')) {
$_SESSION['addr'] = $data->ip;
}
}
}
}
}
if (!empty($_SESSION['authenticated'])) {
if (!empty($_SESSION['visitor_id']) && empty($_SESSION['uid'])) {
$contact = DBA::selectFirst('contact', [], ['id' => $_SESSION['visitor_id']]);
if (DBA::isResult($contact)) {
self::getApp()->contact = $contact;
}
}
if (!empty($_SESSION['uid'])) {
// already logged in user returning
$check = Config::get('system', 'paranoia');
// extra paranoia - if the IP changed, log them out
if ($check && ($_SESSION['addr'] != $_SERVER['REMOTE_ADDR'])) {
Logger::log('Session address changed. Paranoid setting in effect, blocking session. ' .
$_SESSION['addr'] . ' != ' . $_SERVER['REMOTE_ADDR']);
Authentication::deleteSession();
$a->internalRedirect();
}
$user = DBA::selectFirst('user', [],
[
'uid' => $_SESSION['uid'],
'blocked' => false,
'account_expired' => false,
'account_removed' => false,
'verified' => true,
]
);
if (!DBA::isResult($user)) {
Authentication::deleteSession();
$a->internalRedirect();
}
// Make sure to refresh the last login time for the user if the user
// stays logged in for a long time, e.g. with "Remember Me"
$login_refresh = false;
if (empty($_SESSION['last_login_date'])) {
$_SESSION['last_login_date'] = DateTimeFormat::utcNow();
}
if (strcmp(DateTimeFormat::utc('now - 12 hours'), $_SESSION['last_login_date']) > 0) {
$_SESSION['last_login_date'] = DateTimeFormat::utcNow();
$login_refresh = true;
}
Session::setAuthenticatedForUser($a, $user, false, false, $login_refresh);
}
}
}
/**
* @brief Wrapper for adding a login box.
*
* @param string $return_path The path relative to the base the user should be sent
* back to after login completes
* @param bool $register If $register == true provide a registration link.
* This will most always depend on the value of config.register_policy.
* @param array $hiddens optional
*
* @return string Returns the complete html for inserting into the page
*
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @hooks 'login_hook' string $o
*/
public static function form($return_path = null, $register = false, $hiddens = [])
{
$a = self::getApp();
$o = '';
$reg = false;
if ($register && intval($a->getConfig()->get('config', 'register_policy')) !== Register::CLOSED) {
$reg = [
'title' => L10n::t('Create a New Account'),
'desc' => L10n::t('Register')
];
}
$noid = Config::get('system', 'no_openid');
if (is_null($return_path)) {
$return_path = $a->query_string;
}
if (local_user()) {
$tpl = Renderer::getMarkupTemplate('logout.tpl');
} else {
$a->page['htmlhead'] .= Renderer::replaceMacros(
Renderer::getMarkupTemplate('login_head.tpl'),
[
'$baseurl' => $a->getBaseURL(true)
]
);
$tpl = Renderer::getMarkupTemplate('login.tpl');
$_SESSION['return_path'] = $return_path;
}
$o .= Renderer::replaceMacros(
$tpl,
[
'$dest_url' => self::getApp()->getBaseURL(true) . '/login',
'$logout' => L10n::t('Logout'),
'$login' => L10n::t('Login'),
'$lname' => ['username', L10n::t('Nickname or Email: ') , '', ''],
'$lpassword' => ['password', L10n::t('Password: '), '', ''],
'$lremember' => ['remember', L10n::t('Remember me'), 0, ''],
'$openid' => !$noid,
'$lopenid' => ['openid_url', L10n::t('Or login using OpenID: '),'',''],
'$hiddens' => $hiddens,
'$register' => $reg,
'$lostpass' => L10n::t('Forgot your password?'),
'$lostlink' => L10n::t('Password Reset'),
'$tostitle' => L10n::t('Website Terms of Service'),
'$toslink' => L10n::t('terms of service'),
'$privacytitle' => L10n::t('Website Privacy Policy'),
'$privacylink' => L10n::t('privacy policy'),
]
);
Hook::callAll('login_hook', $o);
return $o;
}
}