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validate.php
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validate.php
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<?php
//IMathAS: Checks user's login - prompts if none.
//(c) 2006 David Lippman
header('P3P: CP="ALL CUR ADM OUR"');
$curdir = rtrim(dirname(__FILE__), '/\\');
//Look to see if a hook file is defined, and include if it is
if (isset($CFG['hooks']['validate'])) {
require_once $CFG['hooks']['validate'];
}
session_start();
$sessionid = session_id();
$myrights = 0;
$myspecialrights = 0;
$ispublic = false;
if (isset($CFG['CPS']['theme'])) {
$defaultcoursetheme = $CFG['CPS']['theme'][0];
} else if (!isset($defaultcoursetheme)) {
$defaultcoursetheme = "modern.css";
}
$coursetheme = $defaultcoursetheme; //will be overwritten later if set
if (!isset($CFG['CPS']['miniicons'])) {
$CFG['CPS']['miniicons'] = array(
'assess' => 'assess_tiny.png',
'drill' => 'drill_tiny.png',
'inline' => 'inline_tiny.png',
'linked' => 'html_tiny.png',
'forum' => 'forum_tiny.png',
'wiki' => 'wiki_tiny.png',
'folder' => 'folder_tiny.png',
'tree' => 'folder_tree_tiny.png',
'calendar' => '1day.png');
}
//check for bad sessionids.
if (strlen($sessionid) < 10) {
if (function_exists('session_regenerate_id')) {session_regenerate_id();}
echo sprintf(_("Error. Please %s try again%s"), "<a href=\"$imasroot/index.php\">", "<a href=\"$imasroot/index.php\">", "</a>");
exit;
}
if (!empty($_SESSION['userid'])) { // logged in
$userid = $_SESSION['userid'];
$tzoffset = $_SESSION['tzoffset'] ?? 0;
$tzname = '';
if (isset($_SESSION['tzname']) && $_SESSION['tzname'] != '') {
if (date_default_timezone_set($_SESSION['tzname'])) {
$tzname = $_SESSION['tzname'];
}
}
$lastSessionTime = isset($GLOBALS['sessionLastAccess']) ? $GLOBALS['sessionLastAccess'] : ($_SESSION['time'] ?? 0);
if ((time() - $lastSessionTime) > 24 * 60 * 60 && (!isset($_POST) || count($_POST) == 0)) {
$wasLTI = isset($_SESSION['ltiitemtype']);
unset($userid);
$_SESSION = array();
if ($wasLTI) {
require_once __DIR__."/header.php";
echo _('Your session has expired. Please go back to your LMS and open this assignment again.');
require_once 'footer.php';
exit;
}
}
}
$hasusername = isset($userid);
$haslogin = isset($_POST['password']) && isset($_POST['username']);
if (!$hasusername && !$haslogin && isset($_GET['guestaccess']) && isset($CFG['GEN']['guesttempaccts'])) {
if (empty($_SERVER['HTTP_REFERER'])) {
if (isset($_GET['cid'])) {
$cid = Sanitize::onlyInt($_GET['cid']);
$stm = $DBH->prepare("SELECT istemplate,available FROM imas_courses WHERE id=?");
$stm->execute(array($cid));
$row = $stm->fetch(PDO::FETCH_ASSOC);
if (($row['istemplate'] & 8) != 8 || $row['available'] >= 4) {
echo '<p>' . _('This course does not allow guest access.') . '</p>';
exit;
}
} else {
$cid = 0;
}
$placeinhead = "<script type=\"text/javascript\" src=\"$staticroot/javascript/jstz_min.js\" ></script>";
if (isset($_SERVER['QUERY_STRING'])) {
$querys = '?' . Sanitize::fullQueryString($_SERVER['QUERY_STRING']) . '&guestaccess=true';
} else {
$querys = '?guestaccess=true';
}
$formAction = $GLOBALS['basesiteurl'] . substr($_SERVER['SCRIPT_NAME'], strlen($imasroot)) . Sanitize::encodeStringForDisplay($querys);
require_once __DIR__."/header.php";
echo '<form method=post action="' . $formAction . '">';
echo '<p>' . _('You have requested guest access to a course.') . '</p>';
echo '<p><button type=button onclick="location.href=\'' . $imasroot . '/index.php\'">', _('Nevermind'), '</button> ';
echo '<button type=submit>' . _('Continue') . '</button>';
echo '<input type=hidden id=tzname name=tzname />';
echo '<script type="text/javascript">
$(function() {
var tz = jstz.determine();
document.getElementById("tzname").value = tz.name();
});
</script>';
echo '</form>';
require_once __DIR__ . '/footer.php';
exit;
}
$haslogin = true;
$_POST['username'] = 'guest';
$_POST['mathdisp'] = 0;
$_POST['graphdisp'] = 2;
if (!isset($_POST['tzname'])) { // set an arbitrary default for guests
$_POST['tzname'] = 'America/Los_Angeles';
}
}
if (isset($_GET['checksess']) && !$hasusername) {
echo '<html><body>';
echo _('Unable to establish a session. This is most likely caused by your browser blocking third-party cookies. Please adjust your browser settings and try again.');
echo '</body></html>';
exit;
}
$verified = false;
$err = '';
$now = time();
//Just put in username and password, trying to log in
if ($haslogin && !$hasusername) {
if (isset($CFG['GEN']['guesttempaccts']) && isset($_POST['username']) && $_POST['username'] == 'guest') { // create a temp account when someone logs in w/ username: guest
$stm = $DBH->query('SELECT ver FROM imas_dbschema WHERE id=2');
$guestcnt = $stm->fetchColumn(0);
$stm = $DBH->query('UPDATE imas_dbschema SET ver=ver+1 WHERE id=2');
if (isset($CFG['GEN']['homelayout'])) {
$homelayout = $CFG['GEN']['homelayout'];
} else {
$homelayout = '|0,1,2||0,1';
}
$query = "INSERT INTO imas_users (SID,password,rights,FirstName,LastName,email,msgnotify,homelayout) ";
$query .= "VALUES (:guestcnt,'',5,'Guest','Account','[email protected]',0,:homelayout)";
$stm = $DBH->prepare($query);
$stm->execute(array(':guestcnt' => "guestacct$guestcnt", ':homelayout' => $homelayout));
$userid = $DBH->lastInsertId();
$query = "SELECT id FROM imas_courses WHERE istemplate > 0 AND (istemplate&8)=8 AND available<4";
if (isset($_GET['cid'])) {$query .= ' AND id=:id';}
$stm = $DBH->prepare($query);
if (isset($_GET['cid'])) {
$stm->execute(array(':id' => $_GET['cid']));
} else {
$stm->execute(array());
}
if ($stm->rowCount() > 0) {
$query = "INSERT INTO imas_students (userid,courseid) VALUES ";
$i = 0;
while ($row = $stm->fetch(PDO::FETCH_NUM)) {
if ($i > 0) {$query .= ',';}
$query .= "($userid,{$row[0]})"; //INT's from DB - safe
$i++;
}
$DBH->query($query);
}
$line['id'] = $userid;
$line['rights'] = 5;
$line['groupid'] = 0;
$line['jsondata'] = '';
$_POST['password'] = 'temp';
if (isset($CFG['GEN']['newpasswords'])) {
require_once "includes/password.php";
$line['password'] = password_hash('temp', PASSWORD_DEFAULT);
} else {
$line['password'] = md5('temp');
}
$_POST['usedetected'] = true;
} else {
$query = "SELECT id,password,rights,groupid";
if (strpos(basename($_SERVER['PHP_SELF']), 'upgrade.php') === false) {
$query .= ',jsondata,mfa';
}
$query .= " FROM imas_users WHERE SID=:SID";
$stm = $DBH->prepare($query);
$stm->execute(array(':SID' => $_POST['username']));
$line = $stm->fetch(PDO::FETCH_ASSOC);
if ($line != false && isset($line['jsondata'])) {
$json_data = json_decode($line['jsondata'], true);
if (isset($json_data['login_blockuntil']) && time() < $json_data['login_blockuntil']) {
echo _('Too many invalid logins - please wait a minute before trying again, or use the forgot password link to reset your password');
exit;
}
}
}
if (isset($CFG['GEN']['newpasswords'])) {
require_once "includes/password.php";
}
if (!empty($line['mfa'])) {
require_once __DIR__.'/includes/mfa.php';
$mfadata = json_decode($line['mfa'], true);
if (isset($_SERVER['QUERY_STRING'])) {
$querys = '?' . Sanitize::fullQueryString($_SERVER['QUERY_STRING']);
} else {
$querys = '';
}
$formAction = $GLOBALS['basesiteurl'] . substr($_SERVER['SCRIPT_NAME'], strlen($imasroot)) . Sanitize::encodeStringForDisplay($querys);
}
if (($line != false) && (
((!isset($CFG['GEN']['newpasswords']) || $CFG['GEN']['newpasswords'] != 'only') && ((md5($line['password'] . $_SESSION['challenge']) == $_POST['password']) || ($line['password'] == md5($_POST['password']))))
|| (isset($CFG['GEN']['newpasswords']) && password_verify($_POST['password'], $line['password']))
)) {
if (empty($_POST['tzname']) && $_POST['tzoffset'] == '' && strpos(basename($_SERVER['PHP_SELF']), 'upgrade.php') === false) {
echo _('Uh oh, something went wrong. Please go back and try again');
exit;
}
$userid = $line['id'];
$groupid = $line['groupid'];
//for upgrades times:
// if ($line['rights']<100) {
// echo "The system is currently down for maintenence. Please try again later.";
// exit;
// }
//
if ($line['rights'] == 0) {
require_once __DIR__."/header.php";
echo _("You have not yet confirmed your registration. You must respond to the email that was sent to you by IMathAS.");
require_once __DIR__ . '/footer.php';
exit;
}
//$_SESSION['useragent'] = $_SERVER['HTTP_USER_AGENT'];
//$_SESSION['ip'] = $_SERVER['REMOTE_ADDR'];
if (!isset($_POST['mfatoken'])) {
// only do this stuff on initial pass from login page
$_SESSION['secsalt'] = generaterandstring();
if (!isset($_POST['tzoffset'])) {
$_POST['tzoffset'] = 0;
}
if (isset($_POST['tzname'])) {
$_SESSION['logintzname'] = $_POST['tzname'];
}
if (isset($CFG['static_server']) && !empty($_POST['static_check'])) {
$_SESSION['static_ok'] = 1;
}
require_once "$curdir/includes/userprefs.php";
generateuserprefs($userid);
$_SESSION['tzoffset'] = $_POST['tzoffset'];
if (!empty($_POST['tzname']) && strpos(basename($_SERVER['PHP_SELF']), 'upgrade.php') === false) {
$_SESSION['tzname'] = $_POST['tzname'];
}
if (isset($json_data['login_errors'])) {
unset($json_data['login_errors']);
unset($json_data['login_blockuntil']);
$line['jsondata'] = json_encode($json_data);
}
if (isset($CFG['GEN']['newpasswords']) && strlen($line['password']) == 32) { //old password - rehash it
$hashpw = password_hash($_POST['password'], PASSWORD_DEFAULT);
$stm = $DBH->prepare("UPDATE imas_users SET lastaccess=:lastaccess,password=:password,jsondata=:jsondata WHERE id=:id");
$stm->execute(array(':lastaccess' => $now, ':password' => $hashpw, ':jsondata' => $line['jsondata'], ':id' => $userid));
} else {
$stm = $DBH->prepare("UPDATE imas_users SET lastaccess=:lastaccess,jsondata=:jsondata WHERE id=:id");
$stm->execute(array(':lastaccess' => $now, ':jsondata' => $line['jsondata'], ':id' => $userid));
}
}
// check for MFA before actual login
if (!empty($line['mfa']) &&
(empty($mfadata['mfatype']) || $mfadata['mfatype'] == 'all')
) {
$loginmfaverified = false;
if (isset($_COOKIE['gatl']) && isset($mfadata['logintrusted'])) {
foreach ($mfadata['logintrusted'] as $mfatoken) {
if ($mfatoken == $_COOKIE['gatl']) {
$loginmfaverified = true;
break;
}
}
}
if (!$loginmfaverified && isset($_POST['mfatoken'])) {
$loginmfaverified = mfa_verify($mfadata, $formAction, $line['id']);
}
if (!$loginmfaverified) {
mfa_showLoginEntryForm($formAction);
exit;
}
}
// do actual login
$_SESSION['userid'] = $userid;
$_SESSION['time'] = $now;
$_SESSION['started'] = $now;
unset($loginmfaverified);
unset($_SESSION['challenge']); //challenge is used up - forget it.
//call hook, if defined
if (function_exists('onLogin')) {
onLogin();
}
if (!empty($_SERVER['QUERY_STRING'])) {
$querys = '?' . Sanitize::fullQueryString($_SERVER['QUERY_STRING']) . (isset($addtoquerystring) ? '&' . Sanitize::fullQueryString($addtoquerystring) : '');
} else {
$querys = (!empty($addtoquerystring) ? '?' . Sanitize::fullQueryString($addtoquerystring) : '');
}
$needToForcePasswordReset = false;
if ($_POST['username'] != 'guest') {
if (isset($CFG['acct']['passwordMinlength']) && strlen($_POST['password']) < $CFG['acct']['passwordMinlength']) {
$needToForcePasswordReset = true;
} else if (isset($CFG['acct']['passwordFormat'])) {
require_once "includes/newusercommon.php";
if (!checkFormatAgainstRegex($_POST['password'], $CFG['acct']['passwordFormat'])) {
$needToForcePasswordReset = true;
}
}
}
// checks if the array $querys is empty
if (!empty($querys)) {
$rqp = "&r=" . Sanitize::randomQueryStringParam();
} else {
$rqp = "?r=" . Sanitize::randomQueryStringParam();
}
if ($line['rights'] > 74 && !empty($CFG['reqadminmfa']) && empty($line['mfa'])) {
header('Location: ' . $GLOBALS['basesiteurl'] . '/forms.php?action=adminmfanotice&r=' . Sanitize::randomQueryStringParam());
} else if ($needToForcePasswordReset) {
header('Location: ' . $GLOBALS['basesiteurl'] . '/forms.php?action=forcechgpwd&r=' . Sanitize::randomQueryStringParam());
} else {
header('Location: ' . $GLOBALS['basesiteurl'] . substr($_SERVER['SCRIPT_NAME'], strlen($imasroot)) . $querys . $rqp);
}
exit;
} else {
if (empty($_SESSION['challenge'])) {
$badsession = true;
} else {
$badsession = false;
}
if ($line != false) {
if (!isset($json_data['login_errors'])) {
$json_data['login_errors'] = 0;
}
$json_data['login_errors']++;
if ($json_data['login_errors'] > 3) {
$json_data['login_blockuntil'] = time() + 60;
}
$stm = $DBH->prepare("UPDATE imas_users SET jsondata=:jsondata WHERE id=:id");
$stm->execute(array(':jsondata' => json_encode($json_data), ':id' => $line['id']));
}
/* For login error tracking - requires add'l table
if ($line==null) {
$err = "Bad SID";
} else if ($_SESSION['challenge']!=$_POST['challenge']) {
$err = "Bad Challenge (post:{$_POST['challenge']}, sess: ".addslashes($_SESSION['challenge']).")";
} else {
$err = "Bad PW";
}
$err .= ','.addslashes($_SERVER['HTTP_USER_AGENT']);
$query = "INSERT INTO imas_failures (SID,challenge,sent,type) VALUES ";
$query .= "('{$_POST['username']}','{$_SESSION['challenge']}','{$_POST['password']}','$err')";
mysql_query($query) or die("Query failed : " . mysql_error());
*/
}
}
//has logged in already
if ($hasusername) {
//check validity, if desired
//if (($_SESSION['useragent'] != $_SERVER['HTTP_USER_AGENT']) || ($_SESSION['ip'] != $_SERVER['REMOTE_ADDR'])) {
//suggests sidejacking. Delete session and require relogin
// caused issues so removed
//}
//$username = $_COOKIE['username'];
// load OWASP CSRF Protector
if (!empty($CFG['use_csrfp']) && (!isset($init_skip_csrfp) || (isset($init_skip_csrfp) && false == $init_skip_csrfp))) {
require_once __DIR__ . "/csrfp/simplecsrfp.php";
csrfProtector::init();
}
$query = "SELECT SID,rights,groupid,LastName,FirstName,deflib";
if (strpos(basename($_SERVER['PHP_SELF']), 'upgrade.php') === false) {
$query .= ',listperpage,hasuserimg,theme,specialrights,FCMtoken,forcepwreset,mfa,lastemail';
}
$query .= " FROM imas_users WHERE id=:id";
$stm = $DBH->prepare($query);
$stm->execute(array(':id' => $userid));
$line = $stm->fetch(PDO::FETCH_ASSOC);
if (!isset($_SESSION['started'])) {
$_SESSION['started'] = time();
}
if ($line['lastemail'] > $_SESSION['started']) {
// lastemail actually records last password reset
// if password has been reset since session began, force relogin in
user_logout();
header('Location: ' . $GLOBALS['basesiteurl'] . '/index.php?r=' . Sanitize::randomQueryStringParam());
exit;
}
$username = $line['SID'];
$myrights = $line['rights'];
if ($myrights == 12) {
$myrights = 5; // treat pending instructors like guest users.
}
$myspecialrights = $line['specialrights'];
$userHasAdminMFA = false;
if (($myrights > 40 || $myspecialrights > 0) && !empty($line['mfa']) && empty($_SESSION['mfaadminverified'])) {
$mfadata = json_decode($line['mfa'], true);
if (isset($_COOKIE['gat']) && isset($mfadata['trusted'])) {
foreach ($mfadata['trusted'] as $mfatoken) {
if ($mfatoken == $_COOKIE['gat']) {
$_SESSION['mfaadminverified'] = true;
break;
}
}
}
if (empty($_SESSION['mfaadminverified'])) {
$userHasAdminMFA = true;
$myrights = 40;
$myspecialrights = 0;
}
}
$groupid = $line['groupid'];
$userdeflib = $line['deflib'];
$listperpage = intval($line['listperpage']);
if ($listperpage < 1) {$listperpage = 20;}
$selfhasuserimg = $line['hasuserimg'];
/*$usertheme = $line['theme'];
if (isset($usertheme) && $usertheme!='') {
$coursetheme = $usertheme;
}
*/
$FCMtoken = $line['FCMtoken'];
$userfullname = strip_tags($line['FirstName'] . ' ' . $line['LastName']);
$inInstrStuView = false;
if (!isset($_SESSION['userprefs']) && strpos(basename($_SERVER['PHP_SELF']), 'upgrade.php') === false) {
//userprefs are missing! They should be defined from initial session setup
//we should never be here. But in case we are, reload prefs
require_once "$curdir/includes/userprefs.php";
generateuserprefs($userid);
}
if (isset($_SESSION['userprefs']['usertheme']) && strcmp($_SESSION['userprefs']['usertheme'], '0') != 0) {
$coursetheme = $_SESSION['userprefs']['usertheme'];
}
if (!empty($line['forcepwreset']) && (empty($_GET['action']) || $_GET['action'] != 'forcechgpwd')
&& (!isset($_SESSION['ltiitemtype']) || $_SESSION['ltirole'] != 'learner')
&& !isset($_SESSION['emulateuseroriginaluser'])) {
header('Location: ' . $GLOBALS['basesiteurl'] . '/forms.php?action=forcechgpwd&r=' . Sanitize::randomQueryStringParam());
exit;
}
//call hook function in validate hook, if defined
if (function_exists('alreadyLoggededIn')) {
alreadyLoggededIn($userid);
}
$basephysicaldir = rtrim(dirname(__FILE__), '/\\');
if ($myrights == 100 && (isset($_GET['debug']) || isset($_SESSION['debugmode']))) {
ini_set('display_errors', 1);
error_reporting(E_ALL ^ E_NOTICE);
if (isset($_GET['debug'])) {
$_SESSION['debugmode'] = true;
}
}
if (isset($_GET['fullwidth'])) {
$_SESSION['usefullwidth'] = true;
$usefullwidth = true;
} else if (isset($_SESSION['usefullwidth'])) {
$usefullwidth = true;
}
if (isset($_GET['mathdisp'])) {
$_SESSION['mathdisp'] = intval($_GET['mathdisp']);
}
if (isset($_GET['readernavon'])) {
$_SESSION['readernavon'] = true;
}
if (isset($_GET['useflash'])) {
$_SESSION['useflash'] = true;
}
if (isset($_GET['graphdisp'])) {
$_SESSION['graphdisp'] = $_GET['graphdisp'];
}
if (!isset($_SESSION['secsalt'])) { // if it was lost somehow
$_SESSION['secsalt'] = generaterandstring();
}
if (!function_exists('isDiagnostic')) {
function isDiagnostic() {
return isset($_SESSION['isdiag']); // && strpos(basename($_SERVER['PHP_SELF']),'showtest.php')===false) {
}
}
if (isDiagnostic()) {
$urlparts = parse_url($_SERVER['PHP_SELF']);
if ($_SESSION['diag_aver'][0] == 1 &&
!in_array(basename($urlparts['path']), array('showtest.php', 'ltiuserprefs.php'))
) {
header('Location: ' . $GLOBALS['basesiteurl'] . "/assessment/showtest.php?r=" . Sanitize::randomQueryStringParam());
exit;
} else if ($_SESSION['diag_aver'][0] > 1 &&
strpos($_SERVER['PHP_SELF'], 'assess2/') === false &&
!in_array(basename($urlparts['path']), array('ltiuserprefs.php'))
) {
$querystr = 'cid=' . Sanitize::onlyInt($_SESSION['diag_aver'][1]);
$querystr .= '&aid=' . Sanitize::onlyInt($_SESSION['diag_aver'][2]);
header('Location: ' . $GLOBALS['basesiteurl'] . "/assess2/?" . $querystr);
exit;
}
}
// update session time, if not handled by sessionLastAccess
// this is used by local and redis sessions; db sessions handle via sessionLastAccess
if (empty($GLOBALS['sessionLastAccess'])) {
$_SESSION['time'] = time();
}
if (isset($_SESSION['ltiitemtype']) && $_SERVER['PHP_SELF'] == $imasroot . '/index.php') {
if ($myrights > 18) {
foreach ($_SESSION as $k => $v) {
if (substr($k, 0, 3) == 'lti') {
unset($_SESSION[$k]);
}
}
setcookie('fromltimenu', '', time() - 3600);
} else if ($_SESSION['ltiitemtype'] == 0 && $_SESSION['ltirole'] == 'learner') {
require_once __DIR__ . '/includes/userutils.php';
user_logout();
header('Location: ' . $GLOBALS['basesiteurl'] . '/index.php?r=' . Sanitize::randomQueryStringParam());
exit;
}
}
if (isset($_SESSION['ltiitemtype'])) {
$hideAllHeaderNav = true;
if ($_SESSION['ltiitemtype'] == 1) {
if (strpos(basename($_SERVER['PHP_SELF']), 'showtest.php') === false && isset($_GET['cid']) && $_SESSION['ltiitemid'] != $_GET['cid']) {
echo "You do not have access to this page";
echo "<a href=\"$imasroot/course/course.php?cid={$_SESSION['ltiitemid']}\">Return to course page</a>";
exit;
}
$breadcrumbbase = '';
} else if ($_SESSION['ltiitemtype'] == 0 && $_SESSION['ltirole'] == 'learner') {
if (isset($_GET['cid'])) {
if (isset($_SESSION['ltiitemver']) && $_SESSION['ltiitemver'] > 1) {
$breadcrumbbase = "<a href=\"$imasroot/assess2/?cid=" . Sanitize::courseId($_GET['cid']) . "&aid={$_SESSION['ltiitemid']}\">Assignment</a> > ";
} else {
$breadcrumbbase = "<a href=\"$imasroot/assessment/showtest.php?cid=" . Sanitize::courseId($_GET['cid']) . "&id={$_SESSION['ltiitemid']}\">Assignment</a> > ";
}
} else {
$breadcrumbbase = '';
}
$urlparts = parse_url($_SERVER['PHP_SELF']);
$allowedinLTI = array('showtest.php', 'printtest.php', 'msglist.php', 'sentlist.php', 'viewmsg.php', 'msghistory.php',
'redeemlatepass.php', 'gb-viewasid.php', 'showsoln.php', 'ltiuserprefs.php', 'file_manager.php', 'upload_handler.php',
'index.php', 'gbviewassess.php', 'autosave.php', 'endassess.php', 'getscores.php', 'livepollstatus.php', 'loadassess.php',
'loadquestion.php', 'scorequestion.php', 'startassess.php', 'uselatepass.php', 'gbloadassess.php', 'gbloadassessver.php',
'gbloadquestionver.php', 'getquestions.php', 'savework.php', 'posts.php', 'thread.php', 'postsbyname.php',
'savetagged.php', 'recordlikes.php', 'listlikes.php', 'gbloadtexts.php', 'rectrack.php');
//call hook, if defined
if (function_exists('allowedInAssessment')) {
$allowedinLTI = array_merge($allowedinLTI, allowedInAssessment());
}
if (!in_array(basename($urlparts['path']), $allowedinLTI)) {
//if (strpos(basename($_SERVER['PHP_SELF']),'showtest.php')===false && strpos(basename($_SERVER['PHP_SELF']),'printtest.php')===false && strpos(basename($_SERVER['PHP_SELF']),'msglist.php')===false && strpos(basename($_SERVER['PHP_SELF']),'sentlist.php')===false && strpos(basename($_SERVER['PHP_SELF']),'viewmsg.php')===false ) {
$stm = $DBH->prepare("SELECT courseid FROM imas_assessments WHERE id=:id");
$stm->execute(array(':id' => $_SESSION['ltiitemid']));
$cid = Sanitize::courseId($stm->fetchColumn(0));
if (isset($_SESSION['ltiitemver']) && $_SESSION['ltiitemver'] > 1) {
header('Location: ' . $GLOBALS['basesiteurl'] . "/assess2/?cid=$cid&aid={$_SESSION['ltiitemid']}&r=" . Sanitize::randomQueryStringParam());
} else {
header('Location: ' . $GLOBALS['basesiteurl'] . "/assessment/showtest.php?cid=$cid&id={$_SESSION['ltiitemid']}&r=" . Sanitize::randomQueryStringParam());
}
exit;
}
} else if ($_SESSION['ltirole'] == 'instructor') {
if (!empty($_SESSION['ltiver']) && $_SESSION['ltiver'] == '1.3') {
$breadcrumbbase = '<div class="dropdown inlinediv"><a href="#"
role="button"
id="ltimenubutton"
class="dropdown-toggle arrow-down"
data-toggle="dropdown"
aria-haspopup="true"
aria-expanded="false"
>' . _('LTI') . '</a>
<div id="ltimenudiv" role="menu" class="dropdown-menu ltimenu">'
. _('Loading...') . '</div></div> ';
//$breadcrumbbase = "<a id=ltihomelink href=\"$imasroot/lti/ltihome.php\">LTI Home</a> > ";
} else {
$breadcrumbbase = "<a href=\"$imasroot/ltihome.php?showhome=true\">LTI Home</a> > ";
}
} else {
$breadcrumbbase = '';
}
} else {
$breadcrumbbase = "<a href=\"$imasroot/index.php\">Home</a> > ";
}
if ((isset($_GET['cid']) && $_GET['cid'] != "admin" && $_GET['cid'] > 0) || (isset($_SESSION['courseid']) && strpos(basename($_SERVER['PHP_SELF']), 'showtest.php') !== false)) {
if (isset($_GET['cid'])) {
$cid = Sanitize::courseId($_GET['cid']);
} else {
$cid = Sanitize::courseId($_SESSION['courseid']);
}
$stm = $DBH->prepare("SELECT id,locked,timelimitmult,section,latepass,lastaccess,lticourseid,lockaid FROM imas_students WHERE userid=:userid AND courseid=:courseid");
$stm->execute(array(':userid' => $userid, ':courseid' => $cid));
$line = $stm->fetch(PDO::FETCH_ASSOC);
if ($line != false) {
$studentid = $line['id'];
$studentinfo['timelimitmult'] = $line['timelimitmult'];
$studentinfo['section'] = $line['section'];
$studentinfo['latepasses'] = $line['latepass'];
$studentinfo['lockaid'] = $line['lockaid'];
if ($line['lticourseid'] > 0) {
$studentinfo['lticourseid'] = $line['lticourseid'];
}
if ($line['locked'] > 0) {
require_once __DIR__."/header.php";
echo "<p>", _("You have been locked out of this course by your instructor. Please see your instructor for more information."), "</p>";
echo "<p><a href=\"$imasroot/index.php\">Home</a></p>";
require_once __DIR__ . '/footer.php';
exit;
} else {
$now = time();
if (!isset($_SESSION['lastaccess' . $cid]) || $now - $_SESSION['lastaccess' . $cid] > 24 * 3600) {
$stm = $DBH->prepare("UPDATE imas_students SET lastaccess=:lastaccess WHERE id=:id");
$stm->execute(array(':lastaccess' => $now, ':id' => $studentid));
$_SESSION['lastaccess' . $cid] = $now;
$stm = $DBH->prepare("INSERT INTO imas_login_log (userid,courseid,logintime) VALUES (:userid, :courseid, :logintime)");
$stm->execute(array(':userid' => $userid, ':courseid' => $cid, ':logintime' => $now));
$_SESSION['loginlog' . $cid] = $DBH->lastInsertId();
} else if (isset($CFG['GEN']['keeplastactionlog'])) {
$stm = $DBH->prepare("UPDATE imas_login_log SET lastaction=:lastaction WHERE id=:id");
$stm->execute(array(':lastaction' => $now, ':id' => $_SESSION['loginlog' . $cid]));
}
}
} else {
$stm = $DBH->prepare("SELECT id FROM imas_teachers WHERE userid=:userid AND courseid=:courseid");
$stm->execute(array(':userid' => $userid, ':courseid' => $cid));
$line = $stm->fetch(PDO::FETCH_ASSOC);
if ($line != false) {
if ($myrights > 19) {
$teacherid = $line['id'];
if (isset($_GET['stuview'])) {
$_SESSION['stuview'] = $_GET['stuview'];
}
if (isset($_GET['teachview'])) {
unset($_SESSION['stuview']);
}
if (isset($_SESSION['stuview'])) {
$inInstrStuView = true;
unset($teacherid);
$studentid = $line['id'];
}
} else {
$tutorid = $line['id'];
}
} else if ($myrights == 100) {
$teacherid = $userid;
$adminasteacher = true;
} else {
$stm = $DBH->prepare("SELECT id,section FROM imas_tutors WHERE userid=:userid AND courseid=:courseid");
$stm->execute(array(':userid' => $userid, ':courseid' => $cid));
$line = $stm->fetch(PDO::FETCH_ASSOC);
if ($line != false) {
$tutorid = $line['id'];
$tutorsection = trim($line['section']);
} else if ($myrights == 5 && isset($_GET['guestaccess']) && isset($CFG['GEN']['guesttempaccts'])) {
//guest user not enrolled, but trying via guestaccess; enroll
$stm = $DBH->prepare("SELECT istemplate,available FROM imas_courses WHERE id=?");
$stm->execute(array($cid));
$row = $stm->fetch(PDO::FETCH_ASSOC);
if (($row['istemplate'] & 8) == 8 && $row['available'] < 4) {
$stm = $DBH->prepare("INSERT INTO imas_students (userid,courseid) VALUES (?,?)");
$stm->execute(array($userid, $cid));
$studentid = $DBH->lastInsertId();
$studentinfo = array('latepasses' => 0, 'timelimitmult' => 1, 'section' => null);
} else {
echo '<p>' . _('This course does not allow guest access.') . '</p>';
exit;
}
}
}
}
$query = "SELECT imas_courses.name,imas_courses.available,imas_courses.lockaid,imas_courses.copyrights,imas_users.groupid,imas_courses.theme,imas_courses.newflag,imas_courses.msgset,imas_courses.toolset,imas_courses.deftime,imas_courses.latepasshrs,imas_courses.startdate,imas_courses.enddate,imas_courses.UIver ";
$query .= "FROM imas_courses JOIN imas_users ON imas_users.id=imas_courses.ownerid WHERE imas_courses.id=:id";
$stm = $DBH->prepare($query);
$stm->execute(array(':id' => $cid));
if ($stm->rowCount() > 0) {
$crow = $stm->fetch(PDO::FETCH_ASSOC);
$coursename = $crow['name']; //mysql_result($result,0,0);
$coursetheme = $crow['theme']; //mysql_result($result,0,5);
/*if (isset($usertheme) && $usertheme!='') {
$coursetheme = $usertheme;
} else
*/
if (isset($_SESSION['userprefs']['usertheme']) && strcmp($_SESSION['userprefs']['usertheme'], '0') != 0) {
$coursetheme = $_SESSION['userprefs']['usertheme'];
} else if (isset($CFG['CPS']['theme']) && $CFG['CPS']['theme'][1] == 0) {
$coursetheme = $defaultcoursetheme;
} else if (isset($CFG['CPS']['themelist']) && strpos($CFG['CPS']['themelist'], $coursetheme) === false) {
$coursetheme = $defaultcoursetheme;
}
$coursenewflag = $crow['newflag']; //mysql_result($result,0,6);
$coursemsgset = $crow['msgset'] % 5;
$coursetoolset = $crow['toolset'];
$coursedeftime = $crow['deftime'] % 10000;
if ($crow['deftime'] > 10000) {
$coursedefstime = floor($crow['deftime'] / 10000) % 10000;
} else {
$coursedefstime = $coursedeftime;
}
$courseenddate = $crow['enddate'];
$latepasshrs = $crow['latepasshrs'];
$courseUIver = $crow['UIver'];
if (isset($studentid) && !$inInstrStuView && ((($crow['available']) & 1) == 1 || time() < $crow['startdate'])) {
echo _("This course is not available at this time");
exit;
}
$lockaid = $crow['lockaid'];
if (!empty($studentinfo['lockaid'])) {
$lockaid = $studentinfo['lockaid'];
}
if (isset($studentid) && $lockaid > 0) {
if ((($courseUIver == 1 && strpos(basename($_SERVER['PHP_SELF']), 'showtest.php') === false) ||
($courseUIver > 1 && (strpos($_SERVER['PHP_SELF'], 'assess2/') === false ||
strpos($_SERVER['QUERY_STRING'], '&aid=' . $lockaid) === false))
) && strpos(basename($_SERVER['PHP_SELF']), 'ltiuserprefs.php') === false
) {
$stm = $DBH->prepare('SELECT name,msgtoinstr,posttoforum FROM imas_assessments WHERE id=?');
$stm->execute([$lockaid]);
$lockaiddata = $stm->fetch(PDO::FETCH_ASSOC);
$lockaidname = $lockaiddata['name'];
$showlockmsg = true;
if ($lockaiddata['msgtoinstr'] > 0 && strpos($_SERVER['PHP_SELF'], '/msgs/') !== false) {
$showlockmsg = false;
} else if ($lockaiddata['posttoforum'] > 0 && strpos($_SERVER['PHP_SELF'], '/forums/') !== false) {
$showlockmsg = false;
}
if ($showlockmsg) {
require_once __DIR__."/header.php";
echo '<p>', sprintf(_('This course is currently locked for an assessment, <b>%s</b>'),
Sanitize::encodeStringForDisplay($lockaidname)), '</p>';
if (!empty($studentinfo['lockaid'])) {
echo '<p>' , _('That assessment must be submitted before you can open anything else in the course.') , '</p>';
}
if (isset($_SESSION['ltiitemtype']) && $_SESSION['ltiitemtype'] == 0) {
echo "<p>" . _('Go back to the LMS and open the correct assessment') . ".</p>";
if (!empty($studentinfo['lockaid'])) {
echo '<p>' . sprintf(_('Or, if you are done with <b>%s</b>, you can submit it now.'),
Sanitize::encodeStringForDisplay($lockaidname)), '</p>';
echo '<p><form method=post action="'.$imasroot.'/assess2/endassess.php?cid='.$cid.'&aid='.Sanitize::encodeUrlParam($lockaid).'" ';
echo 'onsubmit="return confirm(\''._('Are you SURE you want to submit the assessment for scoring now? If you do, you will not be able to continue working on the assessment later.').'\')">';
echo '<input type=hidden name=redirect value="'.Sanitize::encodeStringForDisplay($_GET['aid']).'"/>';
echo '<button type=submit>';
echo sprintf(_('Submit <em>%s</em> Now'), Sanitize::encodeStringForDisplay($lockaidname)) . '</button>';
echo '</form>';
}
} else if ($courseUIver > 1) {
echo "<p><a href=\"$imasroot/assess2/?cid=$cid&aid=" . Sanitize::encodeUrlParam($lockaid) . "\">", _("Go to Assessment"), "</a> | <a href=\"$imasroot/index.php\">", _("Home"), "</a></p>";
} else {
echo "<p><a href=\"$imasroot/assessment/showtest.php?cid=$cid&id=" . Sanitize::encodeUrlParam($lockaid) . "\">Go to Assessment</a> | <a href=\"$imasroot/index.php\">", _("Home"), "</a></p>";
}
require_once __DIR__ . '/footer.php';
//header('Location: ' . $GLOBALS['basesiteurl'] . "/assessment/showtest.php?cid=$cid&id=$lockaid");
exit;
}
}
}
unset($lockaid);
if ($myrights == 75 && !isset($teacherid) && !isset($studentid) && $crow['groupid'] == $groupid) {
//group admin access
$teacherid = $userid;
$adminasteacher = true;
} else if ($myrights > 19 && !isset($teacherid) && !isset($studentid) && !isset($tutorid) && !$inInstrStuView) {
if ($crow['copyrights'] == 2) {
$instrPreviewId = $userid;
} else if ($crow['copyrights'] == 1 && $crow['groupid'] == $groupid) {
$instrPreviewId = $userid;
}
}
}
} else if (!empty($_GET['cid']) && $_GET['cid'] == "admin") {
$courseUIver = 2;
}
$verified = true;
}
if (!empty($flexwidth) || !empty($hideAllHeaderNav)) {
$nologo = true;
}
if (!$verified) {
if (!isset($skiploginredirect) && strpos(basename($_SERVER['SCRIPT_NAME']), 'directaccess.php') === false) {
if (isset($no_session_handler)) {
if ($no_session_handler === 'json_error') {
header('Content-Type: application/json; charset=utf-8');
echo '{"error": "no_session"}';
} else {
call_user_func($no_session_handler);
}
exit;
}
if (!isset($loginpage)) {
$loginpage = "loginpage.php";
}
require_once $loginpage;
exit;
}
}
if (!isset($cid)) {
$cid = 0;
}
function tzdate($string, $time)
{
global $tzoffset, $tzname;
//$dstoffset = date('I',time()) - date('I',$time);
//return gmdate($string, $time-60*($tzoffset+60*$dstoffset));
if ($tzname != '') {
return date($string, $time);
} else {
$serveroffset = date('Z') + $tzoffset * 60;
return date($string, $time - $serveroffset);
}
//return gmdate($string, $time-60*$tzoffset);
}
function checkeditorok()
{
$ua = $_SERVER['HTTP_USER_AGENT'];
if ((strpos($ua, 'iPhone') !== false || strpos($ua, 'iPad') !== false) &&
preg_match('/OS (\d+)_(\d+)/', $ua, $match)
) {
if ($match[1] >= 5) {
return 1;
} else {
return 0;
}
} else if (strpos($ua, 'Android') !== false &&
preg_match('/Android\s+(\d+)((?:\.\d+)+)\b/', $ua, $match)
) {
if ($match[1] >= 4) {
return 1;
} else {
return 0;
}
} else {
return 1;
}
}
if (!isset($coursename)) {
$coursename = "Course Page";
}
function generaterandstring()
{
$chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
$pass = '';
for ($i = 0; $i < 10; $i++) {
$pass .= substr($chars, rand(0, 61), 1);
}
return $pass;
}
function user_logout() {
$_SESSION = array();
if (isset($_COOKIE[session_name()])) {
setcookie(session_name(), '', time()-42000, '/', '', false, true);
}
session_destroy();
}