إعداد "تسجيل الدخول باستخدام JS Staff"

{
  "user_id": 3,
  "nama": "Sela",
  "email": "sela@contoh.com",
  "peran": "staff",
  "tenant_id": 1,
  "tenant_nama": "Jidanshoppu",
  "tenant_slug": "jidanshoppu"
}

<?php
// sso-config.php — JANGAN di-commit. Isi dari env var.
const SSO_BASE      = 'https://staff.jidanshoppu.com';
const SSO_CLIENT_ID = 'app_xxxxxxxxxxxxxxxx';
const SSO_SECRET    = 'sec_xxxxxxxxxxxxxxxx';
const SSO_REDIRECT  = 'https://order.jidanshoppu.com/sso-callback.php';

<?php
// sso-mulai.php
require 'sso-config.php';
session_start();

/*
 * `state` WAJIB. Acak, disimpan di sesi, dicocokkan lagi di callback.
 * Tanpa ini, penyerang bisa mengirim link callback berisi kode MILIK DIA ke korban —
 * korban jadi login sebagai akun penyerang, lalu mengetik data ke akun itu tanpa sadar.
 */
$_SESSION['sso_state'] = bin2hex(random_bytes(16));

$url = SSO_BASE . '/sso/authorize.php?' . http_build_query([
    'client_id'    => SSO_CLIENT_ID,
    'redirect_uri' => SSO_REDIRECT,
    'state'        => $_SESSION['sso_state'],
]);

header('Location: ' . $url);
exit;

<?php
// sso-callback.php
require 'sso-config.php';
session_start();

// --- Orangnya menolak di layar persetujuan ---
if (isset($_GET['error'])) {
    exit('Login dibatalkan.');
}

// --- Cocokkan state DULU, sebelum menyentuh code ---
$state = (string)($_GET['state'] ?? '');

if ($state === ''
    || !isset($_SESSION['sso_state'])
    || !hash_equals($_SESSION['sso_state'], $state)) {
    // hash_equals, bukan ===: perbandingan biasa berhenti di huruf pertama yang beda,
    // dan selisih waktunya bisa dipakai menebak nilainya.
    exit('State tidak cocok. Ulangi dari awal.');
}
unset($_SESSION['sso_state']);   // sekali pakai

$code = (string)($_GET['code'] ?? '');
if ($code === '') {
    exit('Kode tidak ada.');
}

// --- Tukar kode jadi identitas (SERVER ke server) ---
$ch = curl_init(SSO_BASE . '/sso/token.php');
curl_setopt_array($ch, [
    CURLOPT_POST           => true,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_TIMEOUT        => 10,
    CURLOPT_POSTFIELDS     => http_build_query([
        'client_id'     => SSO_CLIENT_ID,
        'client_secret' => SSO_SECRET,
        'code'          => $code,
        'redirect_uri'  => SSO_REDIRECT,   // harus sama dengan langkah 3
    ]),
]);

$body = curl_exec($ch);
$kode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);

if ($kode !== 200) {
    // Jangan tampilkan $body apa adanya ke pengguna — itu pesan untuk kamu, bukan dia.
    error_log('SSO gagal: ' . $kode . ' ' . $body);
    exit('Login gagal. Coba lagi.');
}

$data = json_decode((string)$body, true);
if (!is_array($data) || empty($data['ok'])) {
    exit('Login gagal. Coba lagi.');
}

$u = $data['user'];

// --- Mulai dari sini urusan kamu ---
session_regenerate_id(true);   // cegah session fixation

$_SESSION['jss_user_id']   = $u['user_id'];
$_SESSION['jss_tenant_id'] = $u['tenant_id'];
$_SESSION['nama']          = $u['nama'];
$_SESSION['peran']         = $u['peran'];

header('Location: /app.php');
exit;

ALTER TABLE staff ADD COLUMN jss_user_id   INTEGER NULL;
ALTER TABLE staff ADD COLUMN jss_tenant_id INTEGER NULL;
CREATE UNIQUE INDEX uq_staff_jss ON staff (jss_user_id);