From 42400a2a58cc74cdcc5a8d583a767e5a17b9478c Mon Sep 17 00:00:00 2001
From: Hamidreza Eqbal <hamidreza.eqbal@gmail.com>
Date: Sun, 27 Oct 2019 11:54:44 +0330
Subject: [PATCH] Check that secret is a valid hex number

---
 mtproxy.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/mtproxy.js b/mtproxy.js
index a82c6d9..794627a 100644
--- a/mtproxy.js
+++ b/mtproxy.js
@@ -29,6 +29,9 @@ for (let i = 0; i < telegram_servers.length; i++) {
 }
 
 var configObj = JSON.parse(fs.readFileSync('config.json', 'utf8'));
+if (Buffer.from(configObj.secret, 'hex').toString('hex') !== configObj.secret) {
+  return console.log('Secret is invalid: Secret must be a hex number');
+}
 
 function reverseInplace (buffer) {
   for (var i = 0, j = buffer.length - 1; i < j; ++i, --j) {