simple-machines-forum/Sources/LogInOut.php

964 lines
No EOL
35 KiB
PHP

<?php
/**
* This file is concerned pretty entirely, as you see from its name, with
* logging in and out members, and the validation of that.
*
* Simple Machines Forum (SMF)
*
* @package SMF
* @author Simple Machines https://www.simplemachines.org
* @copyright 2022 Simple Machines and individual contributors
* @license https://www.simplemachines.org/about/smf/license.php BSD
*
* @version 2.1.3
*/
if (!defined('SMF'))
die('No direct access...');
/**
* Ask them for their login information. (shows a page for the user to type
* in their username and password.)
* It caches the referring URL in $_SESSION['login_url'].
* It is accessed from ?action=login.
*
* Uses Login template and language file with the login sub-template.
*/
function Login()
{
global $txt, $context, $scripturl, $user_info;
// You are already logged in, go take a tour of the boards
if (!empty($user_info['id']))
{
// This came from a valid hashed return url. Or something that knows our secrets...
if (!empty($_REQUEST['return_hash']) && !empty($_REQUEST['return_to']) && hash_hmac('sha1', un_htmlspecialchars($_REQUEST['return_to']), get_auth_secret()) == $_REQUEST['return_hash'])
redirectexit(un_htmlspecialchars($_REQUEST['return_to']));
else
redirectexit();
}
// We need to load the Login template/language file.
loadLanguage('Login');
loadTemplate('Login');
$context['sub_template'] = 'login';
/* This is true when:
* We have a valid header indicating a JQXHR request. This is not sent during a cross domain request.
* OR we have found:
* 1. valid cors host
* 2. A header indicating a SMF request
* 3. The url has a ajax in either the GET or POST
* These are not intended for security, but ensuring the request is intended for a JQXHR response.
*/
if (
(
!empty($_SERVER['HTTP_X_REQUESTED_WITH'])
&& $_SERVER['HTTP_X_REQUESTED_WITH'] == 'XMLHttpRequest'
)
||
(
!empty($context['valid_cors_found'])
&& !empty($_SERVER['HTTP_X_SMF_AJAX'])
&& isset($_REQUEST['ajax'])
)
)
{
$context['from_ajax'] = true;
$context['template_layers'] = array();
}
// Get the template ready.... not really much else to do.
$context['page_title'] = $txt['login'];
$context['default_username'] = &$_REQUEST['u'];
$context['default_password'] = '';
$context['never_expire'] = false;
// Add the login chain to the link tree.
$context['linktree'][] = array(
'url' => $scripturl . '?action=login',
'name' => $txt['login'],
);
// Set the login URL - will be used when the login process is done (but careful not to send us to an attachment).
if (isset($_SESSION['old_url']) && strpos($_SESSION['old_url'], 'dlattach') === false && preg_match('~(board|topic)[=,]~', $_SESSION['old_url']) != 0)
$_SESSION['login_url'] = $_SESSION['old_url'];
// This came from a valid hashed return url. Or something that knows our secrets...
elseif (!empty($_REQUEST['return_hash']) && !empty($_REQUEST['return_to']) && hash_hmac('sha1', un_htmlspecialchars($_REQUEST['return_to']), get_auth_secret()) == $_REQUEST['return_hash'])
$_SESSION['login_url'] = un_htmlspecialchars($_REQUEST['return_to']);
elseif (isset($_SESSION['login_url']) && strpos($_SESSION['login_url'], 'dlattach') !== false)
unset($_SESSION['login_url']);
// Create a one time token.
createToken('login');
}
/**
* Actually logs you in.
* What it does:
* - checks credentials and checks that login was successful.
* - it employs protection against a specific IP or user trying to brute force
* a login to an account.
* - upgrades password encryption on login, if necessary.
* - after successful login, redirects you to $_SESSION['login_url'].
* - accessed from ?action=login2, by forms.
* On error, uses the same templates Login() uses.
*/
function Login2()
{
global $txt, $scripturl, $user_info, $user_settings, $smcFunc;
global $cookiename, $modSettings, $context, $sourcedir, $maintenance;
// Check to ensure we're forcing SSL for authentication
if (!empty($modSettings['force_ssl']) && empty($maintenance) && !httpsOn())
fatal_lang_error('login_ssl_required', false);
// Load cookie authentication stuff.
require_once($sourcedir . '/Subs-Auth.php');
/* This is true when:
* We have a valid header indicating a JQXHR request. This is not sent during a cross domain request.
* OR we have found:
* 1. valid cors host
* 2. A header indicating a SMF request
* 3. The url has a ajax in either the GET or POST
* These are not intended for security, but ensuring the request is intended for a JQXHR response.
*/
if (
(
!empty($_SERVER['HTTP_X_REQUESTED_WITH'])
&& $_SERVER['HTTP_X_REQUESTED_WITH'] == 'XMLHttpRequest'
)
||
(
!empty($context['valid_cors_found'])
&& !empty($_SERVER['HTTP_X_SMF_AJAX'])
&& isset($_REQUEST['ajax'])
)
)
{
$context['from_ajax'] = true;
$context['template_layers'] = array();
}
if (isset($_GET['sa']) && $_GET['sa'] == 'salt' && !$user_info['is_guest'])
{
// First check for 2.1 json-format cookie in $_COOKIE
if (isset($_COOKIE[$cookiename]) && preg_match('~^{"0":\d+,"1":"[0-9a-f]*","2":\d+~', $_COOKIE[$cookiename]) === 1)
list (,, $timeout) = $smcFunc['json_decode']($_COOKIE[$cookiename], true);
// Try checking for 2.1 json-format cookie in $_SESSION
elseif (isset($_SESSION['login_' . $cookiename]) && preg_match('~^{"0":\d+,"1":"[0-9a-f]*","2":\d+~', $_SESSION['login_' . $cookiename]) === 1)
list (,, $timeout) = $smcFunc['json_decode']($_SESSION['login_' . $cookiename]);
// Next, try checking for 2.0 serialized string cookie in $_COOKIE
elseif (isset($_COOKIE[$cookiename]) && preg_match('~^a:[34]:\{i:0;i:\d+;i:1;s:(0|40):"([a-fA-F0-9]{40})?";i:2;[id]:\d+;~', $_COOKIE[$cookiename]) === 1)
list (,, $timeout) = safe_unserialize($_COOKIE[$cookiename]);
// Last, see if you need to fall back on checking for 2.0 serialized string cookie in $_SESSION
elseif (isset($_SESSION['login_' . $cookiename]) && preg_match('~^a:[34]:\{i:0;i:\d+;i:1;s:(0|40):"([a-fA-F0-9]{40})?";i:2;[id]:\d+;~', $_SESSION['login_' . $cookiename]) === 1)
list (,, $timeout) = safe_unserialize($_SESSION['login_' . $cookiename]);
else
{
loadLanguage('Errors');
trigger_error($txt['login_no_session_cookie'], E_USER_ERROR);
}
$user_settings['password_salt'] = bin2hex($smcFunc['random_bytes'](16));
updateMemberData($user_info['id'], array('password_salt' => $user_settings['password_salt']));
// Preserve the 2FA cookie?
if (!empty($modSettings['tfa_mode']) && !empty($_COOKIE[$cookiename . '_tfa']))
{
list (,, $exp) = $smcFunc['json_decode']($_COOKIE[$cookiename . '_tfa'], true);
setTFACookie((int) $exp - time(), $user_info['password_salt'], hash_salt($user_settings['tfa_backup'], $user_settings['password_salt']));
}
setLoginCookie((int) $timeout - time(), $user_info['id'], hash_salt($user_settings['passwd'], $user_settings['password_salt']));
redirectexit('action=login2;sa=check;member=' . $user_info['id'], $context['server']['needs_login_fix']);
}
// Double check the cookie...
elseif (isset($_GET['sa']) && $_GET['sa'] == 'check')
{
// Strike! You're outta there!
if ($_GET['member'] != $user_info['id'])
fatal_lang_error('login_cookie_error', false);
$user_info['can_mod'] = allowedTo('access_mod_center') || (!$user_info['is_guest'] && ($user_info['mod_cache']['gq'] != '0=1' || $user_info['mod_cache']['bq'] != '0=1' || ($modSettings['postmod_active'] && !empty($user_info['mod_cache']['ap']))));
// Some whitelisting for login_url...
if (empty($_SESSION['login_url']))
redirectexit(empty($user_settings['tfa_secret']) ? '' : 'action=logintfa');
elseif (!empty($_SESSION['login_url']) && (strpos($_SESSION['login_url'], 'http://') === false && strpos($_SESSION['login_url'], 'https://') === false))
{
unset($_SESSION['login_url']);
redirectexit(empty($user_settings['tfa_secret']) ? '' : 'action=logintfa');
}
elseif (!empty($user_settings['tfa_secret']))
{
redirectexit('action=logintfa');
}
else
{
// Best not to clutter the session data too much...
$temp = $_SESSION['login_url'];
unset($_SESSION['login_url']);
redirectexit($temp);
}
}
// Beyond this point you are assumed to be a guest trying to login.
if (!$user_info['is_guest'])
redirectexit();
// Are you guessing with a script?
checkSession();
validateToken('login');
spamProtection('login');
// Set the login_url if it's not already set (but careful not to send us to an attachment).
if ((empty($_SESSION['login_url']) && isset($_SESSION['old_url']) && strpos($_SESSION['old_url'], 'dlattach') === false && preg_match('~(board|topic)[=,]~', $_SESSION['old_url']) != 0) || (isset($_GET['quicklogin']) && isset($_SESSION['old_url']) && strpos($_SESSION['old_url'], 'login') === false))
$_SESSION['login_url'] = $_SESSION['old_url'];
// Been guessing a lot, haven't we?
if (isset($_SESSION['failed_login']) && $_SESSION['failed_login'] >= $modSettings['failed_login_threshold'] * 3)
fatal_lang_error('login_threshold_fail', 'login');
// Set up the cookie length. (if it's invalid, just fall through and use the default.)
if (isset($_POST['cookieneverexp']) || (!empty($_POST['cookielength']) && $_POST['cookielength'] == -1))
$modSettings['cookieTime'] = 3153600;
elseif (!empty($_POST['cookielength']) && ($_POST['cookielength'] >= 1 && $_POST['cookielength'] <= 3153600))
$modSettings['cookieTime'] = (int) $_POST['cookielength'];
loadLanguage('Login');
// Load the template stuff.
loadTemplate('Login');
$context['sub_template'] = 'login';
// Create a one time token.
createToken('login');
// Set up the default/fallback stuff.
$context['default_username'] = isset($_POST['user']) ? preg_replace('~&amp;#(\\d{1,7}|x[0-9a-fA-F]{1,6});~', '&#\\1;', $smcFunc['htmlspecialchars']($_POST['user'])) : '';
$context['default_password'] = '';
$context['never_expire'] = $modSettings['cookieTime'] <= 525600;
$context['login_errors'] = array($txt['error_occured']);
$context['page_title'] = $txt['login'];
// Add the login chain to the link tree.
$context['linktree'][] = array(
'url' => $scripturl . '?action=login',
'name' => $txt['login'],
);
// You forgot to type your username, dummy!
if (!isset($_POST['user']) || $_POST['user'] == '')
{
$context['login_errors'] = array($txt['need_username']);
return;
}
// Hmm... maybe 'admin' will login with no password. Uhh... NO!
if (!isset($_POST['passwrd']) || $_POST['passwrd'] == '')
{
$context['login_errors'] = array($txt['no_password']);
return;
}
// No funky symbols either.
if (preg_match('~[<>&"\'=\\\]~', preg_replace('~(&#(\\d{1,7}|x[0-9a-fA-F]{1,6});)~', '', $_POST['user'])) != 0)
{
$context['login_errors'] = array($txt['error_invalid_characters_username']);
return;
}
// And if it's too long, trim it back.
if ($smcFunc['strlen']($_POST['user']) > 80)
{
$_POST['user'] = $smcFunc['substr']($_POST['user'], 0, 79);
$context['default_username'] = preg_replace('~&amp;#(\\d{1,7}|x[0-9a-fA-F]{1,6});~', '&#\\1;', $smcFunc['htmlspecialchars']($_POST['user']));
}
// Are we using any sort of integration to validate the login?
if (in_array('retry', call_integration_hook('integrate_validate_login', array($_POST['user'], isset($_POST['passwrd']) ? $_POST['passwrd'] : null, $modSettings['cookieTime'])), true))
{
$context['login_errors'] = array($txt['incorrect_password']);
return;
}
// Load the data up!
$request = $smcFunc['db_query']('', '
SELECT passwd, id_member, id_group, lngfile, is_activated, email_address, additional_groups, member_name, password_salt,
passwd_flood, tfa_secret
FROM {db_prefix}members
WHERE ' . ($smcFunc['db_case_sensitive'] ? 'LOWER(member_name) = LOWER({string:user_name})' : 'member_name = {string:user_name}') . '
LIMIT 1',
array(
'user_name' => $smcFunc['db_case_sensitive'] ? strtolower($_POST['user']) : $_POST['user'],
)
);
// Probably mistyped or their email, try it as an email address. (member_name first, though!)
if ($smcFunc['db_num_rows']($request) == 0 && strpos($_POST['user'], '@') !== false)
{
$smcFunc['db_free_result']($request);
$request = $smcFunc['db_query']('', '
SELECT passwd, id_member, id_group, lngfile, is_activated, email_address, additional_groups, member_name, password_salt,
passwd_flood, tfa_secret
FROM {db_prefix}members
WHERE email_address = {string:user_name}
LIMIT 1',
array(
'user_name' => $_POST['user'],
)
);
}
// Let them try again, it didn't match anything...
if ($smcFunc['db_num_rows']($request) == 0)
{
$context['login_errors'] = array($txt['username_no_exist']);
return;
}
$user_settings = $smcFunc['db_fetch_assoc']($request);
$smcFunc['db_free_result']($request);
// Bad password! Thought you could fool the database?!
if (!hash_verify_password($user_settings['member_name'], un_htmlspecialchars($_POST['passwrd']), $user_settings['passwd']))
{
// Let's be cautious, no hacking please. thanx.
validatePasswordFlood($user_settings['id_member'], $user_settings['member_name'], $user_settings['passwd_flood']);
// Maybe we were too hasty... let's try some other authentication methods.
$other_passwords = array();
// None of the below cases will be used most of the time (because the salt is normally set.)
if (!empty($modSettings['enable_password_conversion']) && $user_settings['password_salt'] == '')
{
// YaBB SE, Discus, MD5 (used a lot), SHA-1 (used some), SMF 1.0.x, IkonBoard, and none at all.
$other_passwords[] = crypt($_POST['passwrd'], substr($_POST['passwrd'], 0, 2));
$other_passwords[] = crypt($_POST['passwrd'], substr($user_settings['passwd'], 0, 2));
$other_passwords[] = md5($_POST['passwrd']);
$other_passwords[] = sha1($_POST['passwrd']);
$other_passwords[] = md5_hmac($_POST['passwrd'], strtolower($user_settings['member_name']));
$other_passwords[] = md5($_POST['passwrd'] . strtolower($user_settings['member_name']));
$other_passwords[] = md5(md5($_POST['passwrd']));
$other_passwords[] = $_POST['passwrd'];
$other_passwords[] = crypt($_POST['passwrd'], $user_settings['passwd']);
// This one is a strange one... MyPHP, crypt() on the MD5 hash.
$other_passwords[] = crypt(md5($_POST['passwrd']), md5($_POST['passwrd']));
// Snitz style - SHA-256. Technically, this is a downgrade, but most PHP configurations don't support sha256 anyway.
if (strlen($user_settings['passwd']) == 64 && function_exists('mhash') && defined('MHASH_SHA256'))
$other_passwords[] = bin2hex(mhash(MHASH_SHA256, $_POST['passwrd']));
// phpBB3 users new hashing. We now support it as well ;).
$other_passwords[] = phpBB3_password_check($_POST['passwrd'], $user_settings['passwd']);
// APBoard 2 Login Method.
$other_passwords[] = md5(crypt($_POST['passwrd'], 'CRYPT_MD5'));
}
// If the salt is set let's try some other options
elseif (!empty($modSettings['enable_password_conversion']) && $user_settings['password_salt'] != '')
{
// PHPBB 3 check this function exists in PHP 5.5 or higher
if (function_exists('password_verify'))
$other_passwords[] = password_verify($_POST['passwrd'],$user_settings['password_salt']);
// PHP-Fusion
$other_passwords[] = hash_hmac('sha256', $_POST['passwrd'], $user_settings['password_salt']);
// MyBB
$other_passwords[] = md5(md5($user_settings['password_salt']) . md5($_POST['passwrd']));
}
// The hash should be 40 if it's SHA-1, so we're safe with more here too.
elseif (!empty($modSettings['enable_password_conversion']) && strlen($user_settings['passwd']) == 32)
{
// vBulletin 3 style hashing? Let's welcome them with open arms \o/.
$other_passwords[] = md5(md5($_POST['passwrd']) . stripslashes($user_settings['password_salt']));
// Hmm.. p'raps it's Invision 2 style?
$other_passwords[] = md5(md5($user_settings['password_salt']) . md5($_POST['passwrd']));
// Some common md5 ones.
$other_passwords[] = md5($user_settings['password_salt'] . $_POST['passwrd']);
$other_passwords[] = md5($_POST['passwrd'] . $user_settings['password_salt']);
}
elseif (strlen($user_settings['passwd']) == 40)
{
// Maybe they are using a hash from before the password fix.
// This is also valid for SMF 1.1 to 2.0 style of hashing, changed to bcrypt in SMF 2.1
$other_passwords[] = sha1(strtolower($user_settings['member_name']) . un_htmlspecialchars($_POST['passwrd']));
// BurningBoard3 style of hashing.
if (!empty($modSettings['enable_password_conversion']))
$other_passwords[] = sha1($user_settings['password_salt'] . sha1($user_settings['password_salt'] . sha1($_POST['passwrd'])));
// PunBB
$other_passwords[] = sha1($user_settings['password_salt'] . sha1($_POST['passwrd']));
// Perhaps we converted to UTF-8 and have a valid password being hashed differently.
if ($context['character_set'] == 'UTF-8' && !empty($modSettings['previousCharacterSet']) && $modSettings['previousCharacterSet'] != 'utf8')
{
// Try iconv first, for no particular reason.
if (function_exists('iconv'))
$other_passwords['iconv'] = sha1(strtolower(iconv('UTF-8', $modSettings['previousCharacterSet'], $user_settings['member_name'])) . un_htmlspecialchars(iconv('UTF-8', $modSettings['previousCharacterSet'], $_POST['passwrd'])));
// Say it aint so, iconv failed!
if (empty($other_passwords['iconv']) && function_exists('mb_convert_encoding'))
$other_passwords[] = sha1(strtolower(mb_convert_encoding($user_settings['member_name'], 'UTF-8', $modSettings['previousCharacterSet'])) . un_htmlspecialchars(mb_convert_encoding($_POST['passwrd'], 'UTF-8', $modSettings['previousCharacterSet'])));
}
}
// SMF's sha1 function can give a funny result on Linux (Not our fault!). If we've now got the real one let the old one be valid!
if (stripos(PHP_OS, 'win') !== 0 && strlen($user_settings['passwd']) < hash_length())
{
require_once($sourcedir . '/Subs-Compat.php');
$other_passwords[] = sha1_smf(strtolower($user_settings['member_name']) . un_htmlspecialchars($_POST['passwrd']));
}
// Allows mods to easily extend the $other_passwords array
call_integration_hook('integrate_other_passwords', array(&$other_passwords));
// Whichever encryption it was using, let's make it use SMF's now ;).
if (in_array($user_settings['passwd'], $other_passwords))
{
$user_settings['passwd'] = hash_password($user_settings['member_name'], un_htmlspecialchars($_POST['passwrd']));
$user_settings['password_salt'] = bin2hex($smcFunc['random_bytes'](16));
// Update the password and set up the hash.
updateMemberData($user_settings['id_member'], array('passwd' => $user_settings['passwd'], 'password_salt' => $user_settings['password_salt'], 'passwd_flood' => ''));
}
// Okay, they for sure didn't enter the password!
else
{
// They've messed up again - keep a count to see if they need a hand.
$_SESSION['failed_login'] = isset($_SESSION['failed_login']) ? ($_SESSION['failed_login'] + 1) : 1;
// Hmm... don't remember it, do you? Here, try the password reminder ;).
if ($_SESSION['failed_login'] >= $modSettings['failed_login_threshold'])
redirectexit('action=reminder');
// We'll give you another chance...
else
{
// Log an error so we know that it didn't go well in the error log.
log_error($txt['incorrect_password'] . ' - <span class="remove">' . $user_settings['member_name'] . '</span>', 'user');
$context['login_errors'] = array($txt['incorrect_password']);
return;
}
}
}
elseif (!empty($user_settings['passwd_flood']))
{
// Let's be sure they weren't a little hacker.
validatePasswordFlood($user_settings['id_member'], $user_settings['member_name'], $user_settings['passwd_flood'], true);
// If we got here then we can reset the flood counter.
updateMemberData($user_settings['id_member'], array('passwd_flood' => ''));
}
// Correct password, but they've got no salt; fix it!
if (strlen($user_settings['password_salt']) < 32)
{
$user_settings['password_salt'] = bin2hex($smcFunc['random_bytes'](16));
updateMemberData($user_settings['id_member'], array('password_salt' => $user_settings['password_salt']));
}
// Check their activation status.
if (!checkActivation())
return;
DoLogin();
}
/**
* Allows the user to enter their Two-Factor Authentication code
*/
function LoginTFA()
{
global $sourcedir, $txt, $context, $user_info, $modSettings, $scripturl;
if (!$user_info['is_guest'] || empty($context['tfa_member']) || empty($modSettings['tfa_mode']))
fatal_lang_error('no_access', false);
loadLanguage('Profile');
require_once($sourcedir . '/Class-TOTP.php');
$member = $context['tfa_member'];
// Prevent replay attacks by limiting at least 2 minutes before they can log in again via 2FA
if (time() - $member['last_login'] < 120)
fatal_lang_error('tfa_wait', false);
$totp = new \TOTP\Auth($member['tfa_secret']);
$totp->setRange(1);
/* This is true when:
* We have a valid header indicating a JQXHR request. This is not sent during a cross domain request.
* OR we have found:
* 1. valid cors host
* 2. A header indicating a SMF request
* 3. The url has a ajax in either the GET or POST
* These are not intended for security, but ensuring the request is intended for a JQXHR response.
*/
if (
(
!empty($_SERVER['HTTP_X_REQUESTED_WITH'])
&& $_SERVER['HTTP_X_REQUESTED_WITH'] == 'XMLHttpRequest'
)
||
(
!empty($context['valid_cors_found'])
&& !empty($_SERVER['HTTP_X_SMF_AJAX'])
&& isset($_REQUEST['ajax'])
)
)
{
$context['from_ajax'] = true;
$context['template_layers'] = array();
}
if (!empty($_POST['tfa_code']) && empty($_POST['tfa_backup']))
{
// Check to ensure we're forcing SSL for authentication
if (!empty($modSettings['force_ssl']) && empty($maintenance) && !httpsOn())
fatal_lang_error('login_ssl_required', false);
$code = $_POST['tfa_code'];
if (strlen($code) == $totp->getCodeLength() && $totp->validateCode($code))
{
updateMemberData($member['id_member'], array('last_login' => time()));
setTFACookie(3153600, $member['id_member'], hash_salt($member['tfa_backup'], $member['password_salt']));
redirectexit();
}
else
{
validatePasswordFlood($member['id_member'], $member['member_name'], $member['passwd_flood'], false, true);
$context['tfa_error'] = true;
$context['tfa_value'] = $_POST['tfa_code'];
}
}
elseif (!empty($_POST['tfa_backup']))
{
// Check to ensure we're forcing SSL for authentication
if (!empty($modSettings['force_ssl']) && empty($maintenance) && !httpsOn())
fatal_lang_error('login_ssl_required', false);
$backup = $_POST['tfa_backup'];
if (hash_verify_password($member['member_name'], $backup, $member['tfa_backup']))
{
// Get rid of their current TFA settings
updateMemberData($member['id_member'], array(
'tfa_secret' => '',
'tfa_backup' => '',
'last_login' => time(),
));
setTFACookie(3153600, $member['id_member'], hash_salt($member['tfa_backup'], $member['password_salt']));
redirectexit('action=profile;area=tfasetup;backup');
}
else
{
validatePasswordFlood($member['id_member'], $member['member_name'], $member['passwd_flood'], false, true);
$context['tfa_backup_error'] = true;
$context['tfa_value'] = $_POST['tfa_code'];
$context['tfa_backup_value'] = $_POST['tfa_backup'];
}
}
loadTemplate('Login');
$context['sub_template'] = 'login_tfa';
$context['page_title'] = $txt['login'];
$context['tfa_url'] = $scripturl . '?action=logintfa';
}
/**
* Check activation status of the current user.
*/
function checkActivation()
{
global $context, $txt, $scripturl, $user_settings, $modSettings;
if (!isset($context['login_errors']))
$context['login_errors'] = array();
// What is the true activation status of this account?
$activation_status = $user_settings['is_activated'] > 10 ? $user_settings['is_activated'] - 10 : $user_settings['is_activated'];
// Check if the account is activated - COPPA first...
if ($activation_status == 5)
{
$context['login_errors'][] = $txt['coppa_no_consent'] . ' <a href="' . $scripturl . '?action=coppa;member=' . $user_settings['id_member'] . '">' . $txt['coppa_need_more_details'] . '</a>';
return false;
}
// Awaiting approval still?
elseif ($activation_status == 3)
fatal_lang_error('still_awaiting_approval', 'user');
// Awaiting deletion, changed their mind?
elseif ($activation_status == 4)
{
if (isset($_REQUEST['undelete']))
{
updateMemberData($user_settings['id_member'], array('is_activated' => 1));
updateSettings(array('unapprovedMembers' => ($modSettings['unapprovedMembers'] > 0 ? $modSettings['unapprovedMembers'] - 1 : 0)));
}
else
{
$context['disable_login_hashing'] = true;
$context['login_errors'][] = $txt['awaiting_delete_account'];
$context['login_show_undelete'] = true;
return false;
}
}
// Standard activation?
elseif ($activation_status != 1)
{
log_error($txt['activate_not_completed1'] . ' - <span class="remove">' . $user_settings['member_name'] . '</span>', 'user');
$context['login_errors'][] = $txt['activate_not_completed1'] . ' <a href="' . $scripturl . '?action=activate;sa=resend;u=' . $user_settings['id_member'] . '">' . $txt['activate_not_completed2'] . '</a>';
return false;
}
return true;
}
/**
* Perform the logging in. (set cookie, call hooks, etc)
*/
function DoLogin()
{
global $user_info, $user_settings, $smcFunc;
global $maintenance, $modSettings, $context, $sourcedir;
// Load cookie authentication stuff.
require_once($sourcedir . '/Subs-Auth.php');
// Call login integration functions.
call_integration_hook('integrate_login', array($user_settings['member_name'], null, $modSettings['cookieTime']));
// Get ready to set the cookie...
$user_info['id'] = $user_settings['id_member'];
// Bam! Cookie set. A session too, just in case.
setLoginCookie(60 * $modSettings['cookieTime'], $user_settings['id_member'], hash_salt($user_settings['passwd'], $user_settings['password_salt']));
// Reset the login threshold.
if (isset($_SESSION['failed_login']))
unset($_SESSION['failed_login']);
$user_info['is_guest'] = false;
$user_settings['additional_groups'] = explode(',', $user_settings['additional_groups']);
$user_info['is_admin'] = $user_settings['id_group'] == 1 || in_array(1, $user_settings['additional_groups']);
// Are you banned?
is_not_banned(true);
// Don't stick the language or theme after this point.
unset($_SESSION['language'], $_SESSION['id_theme']);
// First login?
$request = $smcFunc['db_query']('', '
SELECT last_login
FROM {db_prefix}members
WHERE id_member = {int:id_member}
AND last_login = 0',
array(
'id_member' => $user_info['id'],
)
);
if ($smcFunc['db_num_rows']($request) == 1)
$_SESSION['first_login'] = true;
else
unset($_SESSION['first_login']);
$smcFunc['db_free_result']($request);
// You've logged in, haven't you?
$update = array('member_ip' => $user_info['ip'], 'member_ip2' => $_SERVER['BAN_CHECK_IP']);
if (empty($user_settings['tfa_secret']))
$update['last_login'] = time();
updateMemberData($user_info['id'], $update);
// Get rid of the online entry for that old guest....
$smcFunc['db_query']('', '
DELETE FROM {db_prefix}log_online
WHERE session = {string:session}',
array(
'session' => 'ip' . $user_info['ip'],
)
);
$_SESSION['log_time'] = 0;
// Log this entry, only if we have it enabled.
if (!empty($modSettings['loginHistoryDays']))
$smcFunc['db_insert']('insert',
'{db_prefix}member_logins',
array(
'id_member' => 'int', 'time' => 'int', 'ip' => 'inet', 'ip2' => 'inet',
),
array(
$user_info['id'], time(), $user_info['ip'], $user_info['ip2']
),
array(
'id_member', 'time'
)
);
// Just log you back out if it's in maintenance mode and you AREN'T an admin.
if (empty($maintenance) || allowedTo('admin_forum'))
redirectexit('action=login2;sa=check;member=' . $user_info['id'], $context['server']['needs_login_fix']);
else
redirectexit('action=logout;' . $context['session_var'] . '=' . $context['session_id'], $context['server']['needs_login_fix']);
}
/**
* Logs the current user out of their account.
* It requires that the session hash is sent as well, to prevent automatic logouts by images or javascript.
* It redirects back to $_SESSION['logout_url'], if it exists.
* It is accessed via ?action=logout;session_var=...
*
* @param bool $internal If true, it doesn't check the session
* @param bool $redirect Whether or not to redirect the user after they log out
*/
function Logout($internal = false, $redirect = true)
{
global $sourcedir, $user_info, $user_settings, $context, $smcFunc, $cookiename, $modSettings;
// They decided to cancel a logout?
if (!$internal && isset($_POST['cancel']) && isset($_GET[$context['session_var']]))
redirectexit(!empty($_SESSION['logout_return']) ? $_SESSION['logout_return'] : '');
// Prompt to logout?
elseif (!$internal && !isset($_GET[$context['session_var']]))
{
loadLanguage('Login');
loadTemplate('Login');
$context['sub_template'] = 'logout';
// This came from a valid hashed return url. Or something that knows our secrets...
if (!empty($_REQUEST['return_hash']) && !empty($_REQUEST['return_to']) && hash_hmac('sha1', un_htmlspecialchars($_REQUEST['return_to']), get_auth_secret()) == $_REQUEST['return_hash'])
{
$_SESSION['logout_url'] = un_htmlspecialchars($_REQUEST['return_to']);
$_SESSION['logout_return'] = $_SESSION['logout_url'];
}
// Setup the return address.
elseif (isset($_SESSION['old_url']))
$_SESSION['logout_return'] = $_SESSION['old_url'];
// Don't go any further.
return;
}
// Make sure they aren't being auto-logged out.
elseif (!$internal && isset($_GET[$context['session_var']]))
checkSession('get');
require_once($sourcedir . '/Subs-Auth.php');
if (isset($_SESSION['pack_ftp']))
$_SESSION['pack_ftp'] = null;
// It won't be first login anymore.
unset($_SESSION['first_login']);
// Just ensure they aren't a guest!
if (!$user_info['is_guest'])
{
// Pass the logout information to integrations.
call_integration_hook('integrate_logout', array($user_settings['member_name']));
// If you log out, you aren't online anymore :P.
$smcFunc['db_query']('', '
DELETE FROM {db_prefix}log_online
WHERE id_member = {int:current_member}',
array(
'current_member' => $user_info['id'],
)
);
}
$_SESSION['log_time'] = 0;
// Empty the cookie! (set it in the past, and for id_member = 0)
setLoginCookie(-3600, 0);
// And some other housekeeping while we're at it.
$salt = bin2hex($smcFunc['random_bytes'](16));
if (!empty($user_info['id']))
updateMemberData($user_info['id'], array('password_salt' => $salt));
if (!empty($modSettings['tfa_mode']) && !empty($user_info['id']) && !empty($_COOKIE[$cookiename . '_tfa']))
{
list (,, $exp) = $smcFunc['json_decode']($_COOKIE[$cookiename . '_tfa'], true);
setTFACookie((int) $exp - time(), $salt, hash_salt($user_settings['tfa_backup'], $salt));
}
session_destroy();
// Off to the merry board index we go!
if ($redirect)
{
if (empty($_SESSION['logout_url']))
redirectexit('', $context['server']['needs_login_fix']);
elseif (!empty($_SESSION['logout_url']) && (strpos($_SESSION['logout_url'], 'http://') === false && strpos($_SESSION['logout_url'], 'https://') === false))
{
unset ($_SESSION['logout_url']);
redirectexit();
}
else
{
$temp = $_SESSION['logout_url'];
unset($_SESSION['logout_url']);
redirectexit($temp, $context['server']['needs_login_fix']);
}
}
}
/**
* MD5 Encryption used for older passwords. (SMF 1.0.x/YaBB SE 1.5.x hashing)
*
* @param string $data The data
* @param string $key The key
* @return string The HMAC MD5 of data with key
*/
function md5_hmac($data, $key)
{
$key = str_pad(strlen($key) <= 64 ? $key : pack('H*', md5($key)), 64, chr(0x00));
return md5(($key ^ str_repeat(chr(0x5c), 64)) . pack('H*', md5(($key ^ str_repeat(chr(0x36), 64)) . $data)));
}
/**
* Custom encryption for phpBB3 based passwords.
*
* @param string $passwd The raw (unhashed) password
* @param string $passwd_hash The hashed password
* @return string The hashed version of $passwd
*/
function phpBB3_password_check($passwd, $passwd_hash)
{
// Too long or too short?
if (strlen($passwd_hash) != 34)
return;
// Range of characters allowed.
$range = './0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
// Tests
$strpos = strpos($range, $passwd_hash[3]);
$count = 1 << $strpos;
$salt = substr($passwd_hash, 4, 8);
$hash = md5($salt . $passwd, true);
for (; $count != 0; --$count)
$hash = md5($hash . $passwd, true);
$output = substr($passwd_hash, 0, 12);
$i = 0;
while ($i < 16)
{
$value = ord($hash[$i++]);
$output .= $range[$value & 0x3f];
if ($i < 16)
$value |= ord($hash[$i]) << 8;
$output .= $range[($value >> 6) & 0x3f];
if ($i++ >= 16)
break;
if ($i < 16)
$value |= ord($hash[$i]) << 16;
$output .= $range[($value >> 12) & 0x3f];
if ($i++ >= 16)
break;
$output .= $range[($value >> 18) & 0x3f];
}
// Return now.
return $output;
}
/**
* This protects against brute force attacks on a member's password.
* Importantly, even if the password was right we DON'T TELL THEM!
*
* @param int $id_member The ID of the member
* @param string $member_name The name of the member.
* @param bool|string $password_flood_value False if we don't have a flood value, otherwise a string with a timestamp and number of tries separated by a |
* @param bool $was_correct Whether or not the password was correct
* @param bool $tfa Whether we're validating for two-factor authentication
*/
function validatePasswordFlood($id_member, $member_name, $password_flood_value = false, $was_correct = false, $tfa = false)
{
global $cookiename, $sourcedir;
// As this is only brute protection, we allow 5 attempts every 10 seconds.
// Destroy any session or cookie data about this member, as they validated wrong.
// Only if they're not validating for 2FA
if (!$tfa)
{
require_once($sourcedir . '/Subs-Auth.php');
setLoginCookie(-3600, 0);
if (isset($_SESSION['login_' . $cookiename]))
unset($_SESSION['login_' . $cookiename]);
}
// We need a member!
if (!$id_member)
{
// Redirect back!
redirectexit();
// Probably not needed, but still make sure...
fatal_lang_error('no_access', false);
}
// Right, have we got a flood value?
if ($password_flood_value !== false)
@list ($time_stamp, $number_tries) = explode('|', $password_flood_value);
// Timestamp or number of tries invalid?
if (empty($number_tries) || empty($time_stamp))
{
$number_tries = 0;
$time_stamp = time();
}
// They've failed logging in already
if (!empty($number_tries))
{
// Give them less chances if they failed before
$number_tries = $time_stamp < time() - 20 ? 2 : $number_tries;
// They are trying too fast, make them wait longer
if ($time_stamp < time() - 10)
$time_stamp = time();
}
$number_tries++;
// Broken the law?
if ($number_tries > 5)
fatal_lang_error('login_threshold_brute_fail', 'login', [$member_name]);
// Otherwise set the members data. If they correct on their first attempt then we actually clear it, otherwise we set it!
updateMemberData($id_member, array('passwd_flood' => $was_correct && $number_tries == 1 ? '' : $time_stamp . '|' . $number_tries));
}
?>