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Janis Steiner
220
server/app-code/system/insecure_zone/php/login_backend.php
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220
server/app-code/system/insecure_zone/php/login_backend.php
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<?php
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//this file handles the login via passkey
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//with db:
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require_once 'WebAuthn.php';
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include "../../../config.php";
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$conn = new mysqli($DB_SERVERNAME, $DB_USERNAME, $DB_PASSWORD,$DB_DATABASE);
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if ($conn->connect_error) {
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$success=0;
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die("Connection failed: " . $conn->connect_error);
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}
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include "../../../api/php/notifications/sendmessage.php"; //to send user notification on login
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include "../../../api/php/log/add_server_entry.php"; //to log things
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try {
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session_start();
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// read get argument and post body
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$fn = filter_input(INPUT_GET, 'fn');
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$requireResidentKey = !!filter_input(INPUT_GET, 'requireResidentKey');
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$userVerification = filter_input(INPUT_GET, 'userVerification', FILTER_SANITIZE_SPECIAL_CHARS);
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$userId = filter_input(INPUT_GET, 'userId', FILTER_SANITIZE_SPECIAL_CHARS);
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$userName = filter_input(INPUT_GET, 'userName', FILTER_SANITIZE_SPECIAL_CHARS);
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$userDisplayName = filter_input(INPUT_GET, 'userDisplayName', FILTER_SANITIZE_SPECIAL_CHARS);
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$userId = preg_replace('/[^0-9a-f]/i', '', $userId);
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$userName = preg_replace('/[^0-9a-z]/i', '', $userName);
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$userDisplayName = preg_replace('/[^0-9a-z öüäéèàÖÜÄÉÈÀÂÊÎÔÛâêîôû]/i', '', $userDisplayName);
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$post = trim(file_get_contents('php://input'));
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if ($post) {
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$post = json_decode($post, null, 512, JSON_THROW_ON_ERROR);
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}
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if ($fn !== 'getStoredDataHtml') {
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// Formats
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$formats = [];
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//if (filter_input(INPUT_GET, 'fmt_android-key')) {
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$formats[] = 'android-key';
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//}
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///if (filter_input(INPUT_GET, 'fmt_android-safetynet')) {
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$formats[] = 'android-safetynet';
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//}
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//if (filter_input(INPUT_GET, 'fmt_apple')) {
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$formats[] = 'apple';
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//}
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//if (filter_input(INPUT_GET, 'fmt_fido-u2f')) {
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$formats[] = 'fido-u2f';
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//}
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//if (filter_input(INPUT_GET, 'fmt_none')) {
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$formats[] = 'none';
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//}
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//if (filter_input(INPUT_GET, 'fmt_packed')) {
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$formats[] = 'packed';
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//}
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//if (filter_input(INPUT_GET, 'fmt_tpm')) {
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$formats[] = 'tpm';
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//}
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$rpId=$_SERVER['SERVER_NAME'];
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$typeUsb = true;
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$typeNfc = true;
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$typeBle = true;
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$typeInt = true;
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$typeHyb = true;
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// cross-platform: true, if type internal is not allowed
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// false, if only internal is allowed
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// null, if internal and cross-platform is allowed
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$crossPlatformAttachment = null;
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if (($typeUsb || $typeNfc || $typeBle || $typeHyb) && !$typeInt) {
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$crossPlatformAttachment = true;
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} else if (!$typeUsb && !$typeNfc && !$typeBle && !$typeHyb && $typeInt) {
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$crossPlatformAttachment = false;
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}
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// new Instance of the server library.
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// make sure that $rpId is the domain name.
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$WebAuthn = new lbuchs\WebAuthn\WebAuthn('WebAuthn Library', $rpId, $formats);
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// add root certificates to validate new registrations
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//if (filter_input(INPUT_GET, 'solo')) {
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$WebAuthn->addRootCertificates('rootCertificates/solo.pem');
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//}
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//if (filter_input(INPUT_GET, 'apple')) {
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$WebAuthn->addRootCertificates('rootCertificates/apple.pem');
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//}
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//if (filter_input(INPUT_GET, 'yubico')) {
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$WebAuthn->addRootCertificates('rootCertificates/yubico.pem');
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//}
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//if (filter_input(INPUT_GET, 'hypersecu')) {
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$WebAuthn->addRootCertificates('rootCertificates/hypersecu.pem');
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//}
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//if (filter_input(INPUT_GET, 'google')) {
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$WebAuthn->addRootCertificates('rootCertificates/globalSign.pem');
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$WebAuthn->addRootCertificates('rootCertificates/googleHardware.pem');
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//}
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//if (filter_input(INPUT_GET, 'microsoft')) {
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$WebAuthn->addRootCertificates('rootCertificates/microsoftTpmCollection.pem');
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//}
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//if (filter_input(INPUT_GET, 'mds')) {
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$WebAuthn->addRootCertificates('rootCertificates/mds');
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//}
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}
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// Handle different functions
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if ($fn === 'getCreateArgs') {
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// Get create arguments
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$createArgs = $WebAuthn->getCreateArgs(\hex2bin($userId), $userName, $userDisplayName, 60*4, $requireResidentKey, $userVerification);
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header('Content-Type: application/json');
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print(json_encode($createArgs));
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// Save challenge to session or somewhere else if needed
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} else if ($fn === 'getGetArgs') {
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$ids = [];
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//get registrations form user table
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//put credential id into session where userid = $userId
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$stmt = $conn->prepare("SELECT credential_id FROM users WHERE user_hex_id = ?");
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$stmt->bind_param("s", $userId);
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$stmt->execute();
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$registration = $stmt->get_result();
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$row = $registration->fetch_assoc();
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if ($registration->num_rows <= 0) {
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throw new Exception('User does not exist');
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}
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$_SESSION["registrations"]["credentialId"]=$row["credential_id"];
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$ids[]=$row["credential_id"];
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$_SESSION["registrations"]["userId"]=$userId;
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$getArgs = $WebAuthn->getGetArgs($ids, 60*4, $typeUsb, $typeNfc, $typeBle, $typeHyb, $typeInt, $userVerification);
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header('Content-Type: application/json');
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print(json_encode($getArgs));
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// save challange to session. you have to deliver it to processGet later.
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$_SESSION['challenge'] = $WebAuthn->getChallenge();
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}else if ($fn === 'processGet') {
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// Process get
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// Retrieve registration data from the database based on credential ID
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$id = base64_decode($post->id);
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$stmt = $conn->prepare("SELECT * FROM users WHERE credential_id = ?");
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$stmt->bind_param("s", $_SESSION["registrations"]["credentialId"]);
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$stmt->execute();
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$registration = $stmt->get_result();
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$row = $registration->fetch_assoc();
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if (!$registration) {
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throw new Exception('Public Key for credential ID not found!');
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}
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$clientDataJSON = base64_decode($post->clientDataJSON);
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$authenticatorData = base64_decode($post->authenticatorData);
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$signature = base64_decode($post->signature);
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$userHandle = base64_decode($post->userHandle);
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$challenge = $_SESSION['challenge'] ?? '';
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$credentialPublicKey = $row['public_key'];
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// Process the get request
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$WebAuthn->processGet($clientDataJSON, $authenticatorData, $signature, $credentialPublicKey, $challenge, null, $userVerification === 'required');
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// Authentication success
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//set sessionso user is authenticated
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$_SESSION["username"]=htmlspecialchars($row["username"]);
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$_SESSION["login"]=true;
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$_SESSION["perms"]=$row["perms"];
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$_SESSION["id"]=$row["id"];
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$_SESSION["email"]=$row["email"];
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$_SESSION["telegram_id"]=$row["telegram_id"];
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$_SESSION["allow_pw_login"]=$row["allow_pw_login"];
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$_SESSION["send_login_message"]=$row["send_login_message"];
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$_SESSION["use_2fa"]=$row["use_2fa"];
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$return = new stdClass();
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$return->success = true;
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if($_SESSION["use_2fa"]=="1"){
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unset($_SESSION["login"]); //set the login state to false
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$_SESSION["2fa_auth"]=true;
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$pin=mt_rand(100000, 999999);
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$_SESSION["pin"]=$pin;
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$ip = $_SERVER['REMOTE_ADDR'];
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$username=$row["username"];
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send_to_user("[2FA-Pin]\nHello $username\nHere is your pin to log into cyberhex: $pin. If you did not try to log in please take steps to secure your account!\nIP: $ip\n",$username);
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//send the user to 2fa auth page
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$return->msg="send_to_2fa";
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}else{
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log_action("LOGIN::SUCCESS","User ".$_SESSION["username"]." logged in with passkey.",$_SESSION["id"]);
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if($_SESSION["send_login_message"]=="1"){
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$ip = $_SERVER['REMOTE_ADDR'];
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$username=$row["username"];
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send_to_user("[LOGIN WARNING]\nHello $username\nSomebody has logged into Cyberhex with your account.\nIf this was you, you can ignore this message. Else please take steps to secure your account!\nIP: $ip\n",$username);
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}
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}
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header('Content-Type: application/json');
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print(json_encode($return));
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}
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} catch (Throwable $ex) {
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$return = new stdClass();
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$return->success = false;
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$return->msg = $ex->getMessage();
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header('Content-Type: application/json');
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print(json_encode($return));
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}
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?>
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