309 lines
9.0 KiB
PHP
309 lines
9.0 KiB
PHP
<?php
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/**
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* @file /src/Core/Authentication.php
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*/
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namespace Friendica\Core;
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use Friendica\App;
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use Friendica\BaseObject;
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use Friendica\Database\DBA;
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use Friendica\Model\User;
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use Friendica\Network\HTTPException\ForbiddenException;
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use Friendica\Util\DateTimeFormat;
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use Friendica\Util\Network;
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use Friendica\Util\Strings;
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/**
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* Handle Authentification, Session and Cookies
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*/
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class Authentication extends BaseObject
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{
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/**
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* Attempts to authenticate using OpenId
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*
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* @param string $openid_url OpenID URL string
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* @param bool $remember Whether to set the session remember flag
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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*/
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public static function openIdAuthentication($openid_url, $remember)
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{
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$noid = Config::get('system', 'no_openid');
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$a = self::getApp();
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// if it's an email address or doesn't resolve to a URL, fail.
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if ($noid || strpos($openid_url, '@') || !Network::isUrlValid($openid_url)) {
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notice(L10n::t('Login failed.') . EOL);
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$a->internalRedirect();
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// NOTREACHED
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}
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// Otherwise it's probably an openid.
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try {
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$openid = new LightOpenID($a->getHostName());
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$openid->identity = $openid_url;
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Session::set('openid', $openid_url);
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Session::set('remember', $remember);
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$openid->returnUrl = $a->getBaseURL(true) . '/openid';
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$openid->optional = ['namePerson/friendly', 'contact/email', 'namePerson', 'namePerson/first', 'media/image/aspect11', 'media/image/default'];
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System::externalRedirect($openid->authUrl());
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} catch (Exception $e) {
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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());
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}
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}
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/**
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* Attempts to authenticate using login/password
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*
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* @param string $username User name
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* @param string $password Clear password
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* @param bool $remember Whether to set the session remember flag
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* @param string $openid_identity OpenID identity
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* @param string $openid_server OpenID URL
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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*/
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public static function passwordAuthentication($username, $password, $remember, $openid_identity, $openid_server)
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{
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$record = null;
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$addon_auth = [
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'username' => $username,
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'password' => $password,
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'authenticated' => 0,
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'user_record' => null
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];
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$a = self::getApp();
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/*
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* An addon indicates successful login by setting 'authenticated' to non-zero value and returning a user record
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* Addons should never set 'authenticated' except to indicate success - as hooks may be chained
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* and later addons should not interfere with an earlier one that succeeded.
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*/
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Hook::callAll('authenticate', $addon_auth);
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try {
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if ($addon_auth['authenticated']) {
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$record = $addon_auth['user_record'];
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if (empty($record)) {
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throw new Exception(L10n::t('Login failed.'));
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}
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} else {
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$record = DBA::selectFirst(
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'user',
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[],
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['uid' => User::getIdFromPasswordAuthentication($username, $password)]
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);
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}
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} catch (Exception $e) {
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Logger::warning('authenticate: failed login attempt', ['action' => 'login', 'username' => Strings::escapeTags($username), 'ip' => $_SERVER['REMOTE_ADDR']]);
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info('Login failed. Please check your credentials.' . EOL);
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$a->internalRedirect();
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}
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if (!$remember) {
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Authentication::setCookie(0); // 0 means delete on browser exit
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}
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// if we haven't failed up this point, log them in.
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Session::set('remember', $remember);
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Session::set('last_login_date', DateTimeFormat::utcNow());
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if (!empty($openid_identity) || !empty($openid_server)) {
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DBA::update('user', ['openid' => $openid_identity, 'openidserver' => $openid_server], ['uid' => $record['uid']]);
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}
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Session::setAuthenticatedForUser($a, $record, true, true);
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$return_path = Session::get('return_path', '');
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Session::remove('return_path');
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$a->internalRedirect($return_path);
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}
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/**
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* @brief Tries to auth the user from the cookie or session
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*
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* @todo Should be moved to Friendica\Core\Session when it's created
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*/
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public static function sessionAuth()
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{
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$a = self::getApp();
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// When the "Friendica" cookie is set, take the value to authenticate and renew the cookie.
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if (isset($_COOKIE["Friendica"])) {
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$data = json_decode($_COOKIE["Friendica"]);
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if (isset($data->uid)) {
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$user = DBA::selectFirst(
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'user',
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[],
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[
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'uid' => $data->uid,
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'blocked' => false,
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'account_expired' => false,
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'account_removed' => false,
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'verified' => true,
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]
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);
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if (DBA::isResult($user)) {
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if (!hash_equals(
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Authentication::getCookieHashForUser($user),
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$data->hash
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)) {
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Logger::log("Hash for user " . $data->uid . " doesn't fit.");
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Authentication::deleteSession();
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$a->internalRedirect();
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}
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// Renew the cookie
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// Expires after 7 days by default,
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// can be set via system.auth_cookie_lifetime
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$authcookiedays = Config::get('system', 'auth_cookie_lifetime', 7);
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Authentication::setCookie($authcookiedays * 24 * 60 * 60, $user);
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// Do the authentification if not done by now
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if (!isset($_SESSION) || !isset($_SESSION['authenticated'])) {
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Session::setAuthenticatedForUser($a, $user);
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if (Config::get('system', 'paranoia')) {
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$_SESSION['addr'] = $data->ip;
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}
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}
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}
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}
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}
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if (!empty($_SESSION['authenticated'])) {
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if (!empty($_SESSION['visitor_id']) && empty($_SESSION['uid'])) {
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$contact = DBA::selectFirst('contact', [], ['id' => $_SESSION['visitor_id']]);
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if (DBA::isResult($contact)) {
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self::getApp()->contact = $contact;
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}
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}
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if (!empty($_SESSION['uid'])) {
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// already logged in user returning
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$check = Config::get('system', 'paranoia');
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// extra paranoia - if the IP changed, log them out
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if ($check && ($_SESSION['addr'] != $_SERVER['REMOTE_ADDR'])) {
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Logger::log('Session address changed. Paranoid setting in effect, blocking session. ' .
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$_SESSION['addr'] . ' != ' . $_SERVER['REMOTE_ADDR']);
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Authentication::deleteSession();
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$a->internalRedirect();
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}
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$user = DBA::selectFirst(
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'user',
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[],
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[
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'uid' => $_SESSION['uid'],
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'blocked' => false,
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'account_expired' => false,
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'account_removed' => false,
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'verified' => true,
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]
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);
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if (!DBA::isResult($user)) {
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Authentication::deleteSession();
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$a->internalRedirect();
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}
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// Make sure to refresh the last login time for the user if the user
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// stays logged in for a long time, e.g. with "Remember Me"
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$login_refresh = false;
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if (empty($_SESSION['last_login_date'])) {
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$_SESSION['last_login_date'] = DateTimeFormat::utcNow();
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}
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if (strcmp(DateTimeFormat::utc('now - 12 hours'), $_SESSION['last_login_date']) > 0) {
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$_SESSION['last_login_date'] = DateTimeFormat::utcNow();
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$login_refresh = true;
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}
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Session::setAuthenticatedForUser($a, $user, false, false, $login_refresh);
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}
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}
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}
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/**
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* @brief Calculate the hash that is needed for the "Friendica" cookie
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*
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* @param array $user Record from "user" table
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*
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* @return string Hashed data
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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*/
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public static function getCookieHashForUser($user)
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{
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return hash_hmac(
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"sha256",
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hash_hmac("sha256", $user["password"], $user["prvkey"]),
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Config::get("system", "site_prvkey")
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);
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}
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/**
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* @brief Set the "Friendica" cookie
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*
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* @param int $time
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* @param array $user Record from "user" table
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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*/
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public static function setCookie($time, $user = [])
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{
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if ($time != 0) {
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$time = $time + time();
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}
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if ($user) {
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$value = json_encode([
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"uid" => $user["uid"],
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"hash" => self::getCookieHashForUser($user),
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"ip" => ($_SERVER['REMOTE_ADDR'] ?? '') ?: '0.0.0.0'
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]);
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} else {
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$value = "";
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}
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setcookie("Friendica", $value, $time, "/", "", (Config::get('system', 'ssl_policy') == App\BaseURL::SSL_POLICY_FULL), true);
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}
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/**
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* @brief Kills the "Friendica" cookie and all session data
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*/
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public static function deleteSession()
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{
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self::setCookie(-3600); // make sure cookie is deleted on browser close, as a security measure
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session_unset();
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session_destroy();
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}
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public static function twoFactorCheck($uid, App $a)
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{
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// Check user setting, if 2FA disabled return
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if (!PConfig::get($uid, '2fa', 'verified')) {
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return;
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}
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// Check current path, if 2fa authentication module return
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if ($a->argc > 0 && in_array($a->argv[0], ['2fa', 'view', 'help', 'api', 'proxy', 'logout'])) {
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return;
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}
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// Case 1: 2FA session present and valid: return
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if (Session::get('2fa')) {
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return;
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}
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// Case 2: No valid 2FA session: redirect to code verification page
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if ($a->isAjax()) {
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throw new ForbiddenException();
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} else {
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$a->internalRedirect('2fa');
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}
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}
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}
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