fix(security): add auth to FCM relay, HMAC to shamcash webhook, fix jwtconnect webhook bypass

backend/ride/firebase/send_fcm.php

@@ -1,7 +1,16 @@
 <?php
-// send_fcm.php - FCM HTTP v1 Sender
+// send_fcm.php - FCM HTTP v1 Sender (Internal use only)
 header('Content-Type: application/json; charset=utf-8');
 
+// 🔐 Require internal API key for authentication
+$apiKey = $_SERVER['HTTP_X_API_KEY'] ?? '';
+$expectedKey = getenv('FCM_INTERNAL_API_KEY');
+if (empty($expectedKey) || !hash_equals($expectedKey, $apiKey)) {
+    http_response_code(403);
+    echo json_encode(['status' => 'error', 'message' => 'Unauthorized']);
+    exit;
+}
+
 $serviceAccountFile = __DIR__ . '/service-account.json';
 
 // السماح فقط بـ POST

walletintaleq.intaleq.xyz/v2/main/jwtconnect.php

@@ -93,11 +93,11 @@ try {
     }
 
     // --- Path 3: Webhook Auth Token (MTN/Cliq external services) ---
-    // ملاحظة: البوابة تعترف بوجود الهيدر فقط. كل webhook يتحقق من القيمة الفعلية بنفسه.
     if (!$authMethod) {
         $webhookToken = $_SERVER['HTTP_X_AUTH_TOKEN'] ?? '';
+        $expectedWebhook = getenv('WEBHOOK_AUTH_TOKEN');
         
-        if (!empty($webhookToken)) {
+        if (!empty($expectedWebhook) && !empty($webhookToken) && hash_equals($expectedWebhook, $webhookToken)) {
             $authMethod = 'WEBHOOK';
         }
     }

walletintaleq.intaleq.xyz/v2/main/ride/shamcash/save_transactions.php

@@ -1,9 +1,8 @@
 <?php
-// shamcash/save_transactions.php (Debug Edition)
+// shamcash/save_transactions.php
 
 ini_set('display_errors', 0);
 error_reporting(E_ALL);
-header("Access-Control-Allow-Origin: *");
 header("Content-Type: application/json");
 
 $log_file = __DIR__ . '/transactions.log';
@@ -17,10 +16,35 @@ function logMsg($msg) {
 
 if ($_SERVER['REQUEST_METHOD'] === 'OPTIONS') { http_response_code(200); exit; }
 
+// 🔐 HMAC Signature Verification
+$sharedSecret = getenv('SHAMCASH_WEBHOOK_SECRET');
+$signature = $_SERVER['HTTP_X_WEBHOOK_SIGNATURE'] ?? '';
+$timestamp = $_SERVER['HTTP_X_TIMESTAMP'] ?? '';
+$rawBody = file_get_contents('php://input');
+
+if (!empty($sharedSecret)) {
+    if (empty($signature) || empty($timestamp)) {
+        http_response_code(401);
+        exit(json_encode(["status" => "error", "msg" => "Missing authentication headers"]));
+    }
+    // Verify timestamp is within 5 minutes
+    if (abs(time() - (int)$timestamp) > 300) {
+        http_response_code(401);
+        exit(json_encode(["status" => "error", "msg" => "Request expired"]));
+    }
+    $expectedSig = hash_hmac('sha256', $timestamp . '.' . $rawBody, $sharedSecret);
+    if (!hash_equals($expectedSig, $signature)) {
+        logMsg("SECURITY: Invalid webhook signature");
+        http_response_code(403);
+        exit(json_encode(["status" => "error", "msg" => "Invalid signature"]));
+    }
+    logMsg("SECURITY: Webhook signature verified");
+}
+
 // الاتصال بقاعدة البيانات
 $paths = [__DIR__.'/../jwtconnect.php', __DIR__.'/../../jwtconnect.php', __DIR__.'/../../../jwtconnect.php'];
-foreach ($paths as $p) { if (file_exists($p)) { include $p; if(isset($con)) break; } }
+foreach ($paths as $p) { if (file_exists($p)) { include $p; } }
-if (!isset($con)) { logMsg("CRITICAL: DB Connection Failed"); exit(json_encode(["status" => "error", "msg" => "DB Failed"])); }
+if (!isset($con) || !$con) { logMsg("CRITICAL: DB Connection Failed"); exit(json_encode(["status" => "error", "msg" => "DB Failed"])); }
 
 if (file_exists(__DIR__ . "/finalize_deposit.php")) include_once __DIR__ . "/finalize_deposit.php";
 if (file_exists(__DIR__ . "/passenger/finalize_deposit.php")) include_once __DIR__ . "/passenger/finalize_deposit.php";