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<?php
function login($db){
/*___Database Query: Login___*/
$username = $_POST["username"];
$password = $_POST["password"];
$safe_username = SQLite3::escapeString(htmlentities($username));
$log_in = false;
$real_password = "";
if($username == "Guest"){
$real_password_db = $db->query("SELECT email FROM jg;");
while($row = $real_password_db->fetchArray(SQLITE3_NUM)){
if($row[0] == $password){
$log_in = true;
break;
}
}
} else {
$pepper = file_get_contents("../database/pepper.txt");
$password = $password . $pepper;
$real_password_db = $db->query("SELECT password FROM user WHERE name='" . $safe_username . "';");
while($real_password_array = $real_password_db->fetchArray(SQLITE3_NUM)){
foreach($real_password_array as $secondelement){
$real_password=$secondelement;
}
}
if (password_verify($password, $real_password)) {
$log_in = true;
}
}
/*___Login___*/
if(!$log_in){
return LOGIN_PASSWORD;
}
$id = user_id($db, $username);
$banned_db = $db->query("SELECT 1 FROM banned_user WHERE user=".$id);
$banned_ar = $banned_db->fetchArray(SQLITE3_NUM);
if($banned_ar[0] == 1){
echo "You are banned. ;_;";
exit;
}
if($db->exec("
BEGIN TRANSACTION;
INSERT INTO log (id, user, login) VALUES (NULL, (SELECT id FROM user WHERE name='" . $username . "'), (SELECT strftime('%s', 'now')));
COMMIT;
")){
$_SESSION["login"] = true;
$_SESSION["username"] = $username;
$_SESSION["userid"] = $id;
return LOGIN_SUCCESSFULL;
} else {
return LOGIN_DATABASE;
}
}
function logout(){
if(session_destroy()){
return LOGOUT_SUCCESSFULL;
} else {
return LOGOUT_FAILURE;
}
}
function brutforce_protection($db){
$_SESSION["login_attempts"] = $_SESSION["login_attempts"] - 1;
$remote_ip = $_SERVER["REMOTE_ADDR"];
$session_id = session_id();
$time = $_SERVER["REQUEST_TIME"];
if($_SESSION["login_attempts"] <= 0){
$db->exec("
BEGIN TRANSACTION;
INSERT INTO banned_user (id, login_attempts, ip, session_id, time) VALUES (NULL, ".$_SESSION["login_attempts"].", '".SQLite3::escapeString($remote_ip)."', '".SQLite3::escapeString($session_id)."', ".$time.");
COMMIT;
");
banned();
} else {
if($db->exec("
BEGIN TRANSACTION;
INSERT INTO banned_user (id, login_attempts, ip, session_id, time) VALUES (NULL, ".$_SESSION["login_attempts"].", '".$db->escapeString($remote_ip)."', '".SQLite3::escapeString($session_id)."', '".$time."');
COMMIT;
")){
return true;
} else {
return false;
}
}
}
function check_if_banned($db){
$remote_ip = $_SERVER["REMOTE_ADDR"];
$session_id = session_id();
$check_db = $db->query("SELECT time, login_attempts, id FROM banned_user WHERE ip='".SQLite3::escapeString($remote_ip)."' OR session_id='".SQLite3::escapeString($session_id)."' ORDER BY id DESC;");
$check_ar = $check_db->fetchArray(SQLITE3_NUM);
$log_at = $check_ar[1];
if($log_at){
$_SESSION["login_attempts"] = $log_at;
}
$accepted_time = $_SERVER["REQUEST_TIME"] - 21600; // == 6h
$db->exec("DELETE FROM banned_user WHERE time<'".$accepted_time."'");
if($log_at <= 0){
if($check_ar[0] >= $accepted_time){
return true; // still banned
}
}
return false; // not longer banned
}
function banned(){
header("Refresh: 0; ".$GLOBALS["scheme"].$_SERVER["HTTP_HOST"]."/banned");
exit;
}
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